binutils-gdb/gdb/ravenscar-thread.c

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/* Ada Ravenscar thread support.
Copyright (C) 2004-2018 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "gdbcore.h"
#include "gdbthread.h"
#include "ada-lang.h"
#include "target.h"
#include "inferior.h"
#include "command.h"
#include "ravenscar-thread.h"
Convert observers to C++ This converts observers from using a special source-generating script to be plain C++. This version of the patch takes advantage of C++11 by using std::function and variadic templates; incorporates Pedro's patches; and renames the header file to "observable.h" (this change eliminates the need for a clean rebuild). Note that Pedro's patches used a template lambda in tui-hooks.c, but this failed to compile on some buildbot instances (presumably due to differing C++ versions); I replaced this with an ordinary template function. Regression tested on the buildbot. gdb/ChangeLog 2018-03-19 Pedro Alves <palves@redhat.com> Tom Tromey <tom@tromey.com> * unittests/observable-selftests.c: New file. * common/observable.h: New file. * observable.h: New file. * ada-lang.c, ada-tasks.c, agent.c, aix-thread.c, annotate.c, arm-tdep.c, auto-load.c, auxv.c, break-catch-syscall.c, breakpoint.c, bsd-uthread.c, cli/cli-interp.c, cli/cli-setshow.c, corefile.c, dummy-frame.c, event-loop.c, event-top.c, exec.c, extension.c, frame.c, gdbarch.c, guile/scm-breakpoint.c, infcall.c, infcmd.c, inferior.c, inflow.c, infrun.c, jit.c, linux-tdep.c, linux-thread-db.c, m68klinux-tdep.c, mi/mi-cmd-break.c, mi/mi-interp.c, mi/mi-main.c, objfiles.c, ppc-linux-nat.c, ppc-linux-tdep.c, printcmd.c, procfs.c, python/py-breakpoint.c, python/py-finishbreakpoint.c, python/py-inferior.c, python/py-unwind.c, ravenscar-thread.c, record-btrace.c, record-full.c, record.c, regcache.c, remote.c, riscv-tdep.c, sol-thread.c, solib-aix.c, solib-spu.c, solib.c, spu-multiarch.c, spu-tdep.c, stack.c, symfile-mem.c, symfile.c, symtab.c, thread.c, top.c, tracepoint.c, tui/tui-hooks.c, tui/tui-interp.c, valops.c: Update all users. * tui/tui-hooks.c (tui_bp_created_observer) (tui_bp_deleted_observer, tui_bp_modified_observer) (tui_inferior_exit_observer, tui_before_prompt_observer) (tui_normal_stop_observer, tui_register_changed_observer): Remove. (tui_observers_token): New global. (attach_or_detach, tui_attach_detach_observers): New functions. (tui_install_hooks, tui_remove_hooks): Use tui_attach_detach_observers. * record-btrace.c (record_btrace_thread_observer): Remove. (record_btrace_thread_observer_token): New global. * observer.sh: Remove. * observer.c: Rename to observable.c. * observable.c (namespace gdb_observers): Define new objects. (observer_debug): Move into gdb_observers namespace. (struct observer, struct observer_list, xalloc_observer_list_node) (xfree_observer_list_node, generic_observer_attach) (generic_observer_detach, generic_observer_notify): Remove. (_initialize_observer): Update. Don't include observer.inc. * Makefile.in (generated_files): Remove observer.h, observer.inc. (clean mostlyclean): Likewise. (observer.h, observer.inc): Remove targets. (SUBDIR_UNITTESTS_SRCS): Add observable-selftests.c. (COMMON_SFILES): Use observable.c, not observer.c. * .gitignore: Remove observer.h. gdb/doc/ChangeLog 2018-03-19 Tom Tromey <tom@tromey.com> * observer.texi: Remove. gdb/testsuite/ChangeLog 2018-03-19 Tom Tromey <tom@tromey.com> * gdb.gdb/observer.exp: Remove.
2016-10-02 18:50:20 +02:00
#include "observable.h"
#include "gdbcmd.h"
#include "top.h"
#include "regcache.h"
start change to progspace independence This patch starts changing minimal symbols to be independent of the program space. Specifically, it adds a new objfile parameter to MSYMBOL_VALUE_ADDRESS and changes all the code to use it. This is needed so we can change gdb to apply the section offset when a minsym's address is computed, as opposed to baking the offsets into the symbol itself. A few spots still need the unrelocated address. For these, we introduce MSYMBOL_VALUE_RAW_ADDRESS. As a convenience, we also add the new macro BMSYMBOL_VALUE_ADDRESS, which computes the address of a bound minimal symbol. This just does the obvious thing with the fields. Note that this change does not actually enable program space independence. That requires more changes to gdb. However, to ensure that these changes compile properly, this patch does add the needed section lookup code to MSYMBOL_VALUE_ADDRESS -- it just ensures it has no effect at runtime by multiplying the offset by 0. 2014-02-26 Tom Tromey <tromey@redhat.com> * ada-lang.c (ada_main_name): Update. (ada_add_standard_exceptions): Update. * ada-tasks.c (ada_tasks_inferior_data_sniffer): Update. * aix-thread.c (pdc_symbol_addrs, pd_enable): Update. * arm-tdep.c (skip_prologue_function, arm_skip_stub): Update. * auxv.c (ld_so_xfer_auxv): Update. * avr-tdep.c (avr_scan_prologue): Update. * ax-gdb.c (gen_var_ref): Update. * blockframe.c (get_pc_function_start) (find_pc_partial_function_gnu_ifunc): Update. * breakpoint.c (create_overlay_event_breakpoint) (create_longjmp_master_breakpoint) (create_std_terminate_master_breakpoint) (create_exception_master_breakpoint): Update. * bsd-uthread.c (bsd_uthread_lookup_address): Update. * c-valprint.c (c_val_print): Update. * coff-pe-read.c (add_pe_forwarded_sym): Update. * common/agent.c (agent_look_up_symbols): Update. * dbxread.c (find_stab_function_addr, end_psymtab): Update. * dwarf2loc.c (call_site_to_target_addr): Update. * dwarf2read.c (dw2_find_pc_sect_symtab): Update. * elfread.c (elf_gnu_ifunc_record_cache) (elf_gnu_ifunc_resolve_by_got): Update. * findvar.c (default_read_var_value): Update. * frame.c (inside_main_func): Update. * frv-tdep.c (frv_frame_this_id): Update. * glibc-tdep.c (glibc_skip_solib_resolver): Update. * gnu-v3-abi.c (gnuv3_get_typeid, gnuv3_skip_trampoline): Update. * hppa-hpux-tdep.c (hppa64_hpux_search_dummy_call_sequence) (hppa_hpux_find_dummy_bpaddr): Update. * hppa-tdep.c (hppa_symbol_address): Update. * infcmd.c (until_next_command): Update. * jit.c (jit_read_descriptor, jit_breakpoint_re_set_internal): Update. * linespec.c (minsym_found, add_minsym): Update. * linux-nat.c (get_signo): Update. * linux-thread-db.c (inferior_has_bug): Update. * m32c-tdep.c (m32c_return_value) (m32c_m16c_address_to_pointer): Update. * m32r-tdep.c (m32r_frame_this_id): Update. * m68hc11-tdep.c (m68hc11_get_register_info): Update. * machoread.c (macho_resolve_oso_sym_with_minsym): Update. * maint.c (maintenance_translate_address): Update. * minsyms.c (lookup_minimal_symbol_by_pc_name): Update. (frob_address): New function. (lookup_minimal_symbol_by_pc_section_1): Use raw addresses, frob_address. Rename parameter to "pc_in". (compare_minimal_symbols, compact_minimal_symbols): Use raw addresses. (find_solib_trampoline_target, minimal_symbol_upper_bound): Update. * mips-linux-tdep.c (mips_linux_skip_resolver): Update. * mips-tdep.c (mips_skip_pic_trampoline_code): Update. * objc-lang.c (find_objc_msgsend): Update. * objfiles.c (objfile_relocate1): Update. * obsd-tdep.c (obsd_skip_solib_resolver): Update. * p-valprint.c (pascal_val_print): Update. * parse.c (write_exp_msymbol): Update. * ppc-linux-tdep.c (ppc_linux_spe_context_lookup) (ppc_elfv2_skip_entrypoint): Update. * ppc-sysv-tdep.c (convert_code_addr_to_desc_addr): Update. * printcmd.c (build_address_symbolic, msym_info) (address_info): Update. * proc-service.c (ps_pglobal_lookup): Update. * psymtab.c (find_pc_sect_psymtab_closer) (find_pc_sect_psymtab, find_pc_sect_symtab_from_partial): Change msymbol parameter to bound_minimal_symbol. * ravenscar-thread.c (get_running_thread_id): Update. * remote.c (remote_check_symbols): Update. * sh64-tdep.c (sh64_elf_make_msymbol_special): Use raw address. * sol2-tdep.c (sol2_skip_solib_resolver): Update. * solib-dsbt.c (lm_base): Update. * solib-frv.c (lm_base, main_got): Update. * solib-irix.c (locate_base): Update. * solib-som.c (som_solib_create_inferior_hook) (link_map_start): Update. * solib-spu.c (spu_enable_break, ocl_enable_break): Update. * solib-svr4.c (elf_locate_base, enable_break): Update. * spu-tdep.c (spu_get_overlay_table, spu_catch_start) (flush_ea_cache): Update. * stabsread.c (define_symbol, scan_file_globals): Update. * stack.c (find_frame_funname): Update. * symfile-debug.c (debug_qf_expand_symtabs_matching) (debug_qf_find_pc_sect_symtab): Update. * symfile.c (simple_read_overlay_table) (simple_overlay_update): Update. * symfile.h (struct quick_symbol_functions) <find_pc_sect_symtab>: Change type of msymbol to bound_minimal_symbol. * symmisc.c (dump_msymbols): Update. * symtab.c (find_pc_sect_symtab_via_partial) (find_pc_sect_psymtab, find_pc_sect_line, skip_prologue_sal) (search_symbols, print_msymbol_info): Update. * symtab.h (MSYMBOL_VALUE_RAW_ADDRESS): New macro. (MSYMBOL_VALUE_ADDRESS): Redefine. (BMSYMBOL_VALUE_ADDRESS): New macro. * tracepoint.c (scope_info): Update. * tui/tui-disasm.c (tui_find_disassembly_address) (tui_get_begin_asm_address): Update. * valops.c (find_function_in_inferior): Update. * value.c (value_static_field, value_fn_field): Update.
2013-08-15 16:46:35 +02:00
#include "objfiles.h"
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
/* This module provides support for "Ravenscar" tasks (Ada) when
debugging on bare-metal targets.
The typical situation is when debugging a bare-metal target over
the remote protocol. In that situation, the system does not know
about high-level comcepts such as threads, only about some code
running on one or more CPUs. And since the remote protocol does not
provide any handling for CPUs, the de facto standard for handling
them is to have one thread per CPU, where the thread's ptid has
its lwp field set to the CPU number (eg: 1 for the first CPU,
2 for the second one, etc). This module will make that assumption.
This module then creates and maintains the list of threads based
on the list of Ada tasks, with one thread per Ada tasks. The convention
is that threads corresponding to the CPUs (see assumption above)
have a ptid_t of the form (PID, LWP, 0), which threads corresponding
to our Ada tasks have a ptid_t of the form (PID, 0, TID) where TID
is the Ada task's ID as extracted from Ada runtime information.
Switching to a given Ada tasks (or its underlying thread) is performed
by fetching the registers of that tasks from the memory area where
the registers were saved. For any of the other operations, the
operation is performed by first finding the CPU on which the task
is running, switching to its corresponding ptid, and then performing
the operation on that ptid using the target beneath us. */
/* If non-null, ravenscar task support is enabled. */
static int ravenscar_task_support = 1;
/* This module's target-specific operations. */
static struct target_ops ravenscar_ops;
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
/* PTID of the last thread that received an event.
This can be useful to determine the associated task that received
the event, to make it the current task. */
static ptid_t base_ptid;
static const char running_thread_name[] = "__gnat_running_thread_table";
static const char known_tasks_name[] = "system__tasking__debug__known_tasks";
static const char first_task_name[] = "system__tasking__debug__first_task";
static const char ravenscar_runtime_initializer[] =
"system__bb__threads__initialize";
Push pruning old threads down to the target When GDB wants to sync the thread list with the target's (e.g., due to "info threads"), it calls update_thread_list: update_thread_list (void) { prune_threads (); target_find_new_threads (); update_threads_executing (); } And then prune_threads does: prune_threads (void) { struct thread_info *tp, *next; for (tp = thread_list; tp; tp = next) { next = tp->next; if (!thread_alive (tp)) delete_thread (tp->ptid); } } Calling thread_live on each thread one by one is expensive. E.g., on Linux, it ends up doing kill(SIG0) once for each thread. Not a big deal, but still a bunch of syscalls... With the remote target, it's cumbersome. That thread_alive call ends up generating one T packet per thread: Sending packet: $Tp2141.2150#82...Packet received: OK Sending packet: $Tp2141.214f#b7...Packet received: OK Sending packet: $Tp2141.2141#82...Packet received: OK Sending packet: $qXfer:threads:read::0,fff#03...Packet received: l<threads>\n<thread id="p2141.2141" core="2"/>\n<thread id="p2141.214f" core="1"/>\n<thread id="p2141.2150" core="2"/>\n</threads>\n That seems a bit silly when target_find_new_threads method implementations will always fetch the whole current set of target threads, and then add those that are not in GDB's thread list, to GDB's thread list. This patch thus pushes down the responsibility of pruning dead threads to the target_find_new_threads method instead, so a target may implement pruning dead threads however it wants. Once we do that, target_find_new_threads becomes a misnomer, so the patch renames it to target_update_thread_list. The patch doesn't attempt to do any optimization to any target yet. It simply exports prune_threads, and makes all implementations of target_update_thread_list call that. It's meant to be a no-op. gdb/ 2014-10-15 Pedro Alves <palves@redhat.com> * ada-tasks.c (print_ada_task_info, task_command_1): Adjust. * bsd-uthread.c (bsd_uthread_find_new_threads): Rename to ... (bsd_uthread_update_thread_list): ... this. Call prune_threads. (bsd_uthread_target): Adjust. * corelow.c (core_open): Adjust. * dec-thread.c (dec_thread_find_new_threads): Update comment. (dec_thread_update_thread_list): New function. (init_dec_thread_ops): Adjust. * gdbthread.h (prune_threads): New declaration. * linux-thread-db.c (thread_db_find_new_threads): Rename to ... (thread_db_update_thread_list): ... this. Call prune_threads. (init_thread_db_ops): Adjust. * nto-procfs.c (procfs_find_new_threads): Rename to ... (procfs_update_thread_list): ... this. Call prune_threads. (procfs_attach, procfs_create_inferior, init_procfs_targets): Adjust. * obsd-nat.c (obsd_find_new_threads): Rename to ... (obsd_update_thread_list): ... this. Call prune_threads. (obsd_add_target): Adjust. * procfs.c (procfs_target): Adjust. (procfs_notice_thread): Update comment. (procfs_find_new_threads): Rename to ... (procfs_update_thread_list): ... this. Call prune_threads. * ravenscar-thread.c (ravenscar_update_inferior_ptid): Update comment. (ravenscar_wait): Adjust. (ravenscar_find_new_threads): Rename to ... (ravenscar_update_thread_list): ... this. Call prune_threads. (init_ravenscar_thread_ops): Adjust. * record-btrace.c (record_btrace_find_new_threads): Rename to ... (record_btrace_update_thread_list): ... this. Adjust comment. (init_record_btrace_ops): Adjust. * remote.c (remote_threads_info): Rename to ... (remote_update_thread_list): ... this. Call prune_threads. (remote_start_remote, extended_remote_attach_1, init_remote_ops): Adjust. * sol-thread.c (check_for_thread_db): Adjust. (sol_find_new_threads_callback): Rename to ... (sol_update_thread_list_callback): ... this. (sol_find_new_threads): Rename to ... (sol_update_thread_list): ... this. Call prune_threads. Adjust. (sol_get_ada_task_ptid, init_sol_thread_ops): Adjust. * target-delegates.c: Regenerate. * target.c (target_find_new_threads): Rename to ... (target_update_thread_list): ... this. * target.h (struct target_ops): Rename to_find_new_threads field to to_update_thread_list. (target_find_new_threads): Rename to ... (target_update_thread_list): ... this. * thread.c (prune_threads): Make extern. (update_thread_list): Adjust.
2014-10-15 23:44:00 +02:00
static void ravenscar_update_thread_list (struct target_ops *ops);
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
static ptid_t ravenscar_active_task (int cpu);
-Wwrite-strings: Constify target_pid_to_str and target_thread_extra_thread_info -Wwrite-strings flagged a missing cast for example here: static char * ravenscar_extra_thread_info (struct target_ops *self, struct thread_info *tp) { return "Ravenscar task"; Since callers are not supposed to free the string returned by these methods, change the methods' signature to return const strings. gdb/ChangeLog: 2017-04-05 Pedro Alves <palves@redhat.com> * aix-thread.c (aix_thread_pid_to_str) (aix_thread_extra_thread_info): Constify. * bsd-kvm.c (bsd_kvm_pid_to_str): Constify. * bsd-uthread.c (bsd_uthread_extra_thread_info) (bsd_uthread_pid_to_str): Constify. * corelow.c (core_pid_to_str): Constify. * darwin-nat.c (darwin_pid_to_str): Constify. * fbsd-nat.c (fbsd_pid_to_str): Constify. * fbsd-tdep.c (fbsd_core_pid_to_str, gdbarch_core_pid_to_str): Constify. * gnu-nat.c (gnu_pid_to_str): Constify. * go32-nat.c (go32_pid_to_str): Constify. * i386-cygwin-tdep.c (i386_windows_core_pid_to_str): Constify. * inf-ptrace.c (inf_ptrace_pid_to_str): Constify. * inferior.c (inferior_pid_to_str): Constify. * linux-nat.c (linux_nat_pid_to_str): Constify. * linux-tdep.c (linux_core_pid_to_str): Constify. * linux-thread-db.c (thread_db_pid_to_str) (thread_db_extra_thread_info): Constify. * nto-tdep.c (nto_extra_thread_info): Constify. * nto-tdep.h (nto_extra_thread_info): Constify. * obsd-nat.c (obsd_pid_to_str): Constify. * procfs.c (procfs_pid_to_str): Constify. * ravenscar-thread.c (ravenscar_extra_thread_info) (ravenscar_pid_to_str): Constify. * remote-sim.c (gdbsim_pid_to_str): Constify. * remote.c (remote_threads_extra_info, remote_pid_to_str): Constify. * sol-thread.c (solaris_pid_to_str): Constify. * sol2-tdep.c (sol2_core_pid_to_str): Constify. * sol2-tdep.h (sol2_core_pid_to_str): Constify. * target.c (default_pid_to_str, target_pid_to_str) (normal_pid_to_str, default_pid_to_str): Constify. * target.h (target_ops::to_pid_to_str) (target_ops::to_extra_thread_info): Constify. (target_pid_to_str, normal_pid_to_str): Constify. * windows-nat.c (windows_pid_to_str): Constify. * gdbarch.sh (core_pid_to_str): Constify. * target-delegates.c: Regenerate. * gdbarch.h, gdbarch.c: Regenerate.
2017-04-05 20:21:34 +02:00
static const char *ravenscar_extra_thread_info (struct target_ops *self,
struct thread_info *tp);
static int ravenscar_thread_alive (struct target_ops *ops, ptid_t ptid);
static void ravenscar_fetch_registers (struct target_ops *ops,
struct regcache *regcache, int regnum);
static void ravenscar_store_registers (struct target_ops *ops,
struct regcache *regcache, int regnum);
static void ravenscar_prepare_to_store (struct target_ops *self,
struct regcache *regcache);
static void ravenscar_resume (struct target_ops *ops, ptid_t ptid, int step,
enum gdb_signal siggnal);
static void ravenscar_mourn_inferior (struct target_ops *ops);
static void ravenscar_update_inferior_ptid (void);
static int has_ravenscar_runtime (void);
static int ravenscar_runtime_initialized (void);
static void ravenscar_inferior_created (struct target_ops *target,
int from_tty);
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
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/* Return nonzero iff PTID corresponds to a ravenscar task. */
static int
is_ravenscar_task (ptid_t ptid)
{
/* By construction, ravenscar tasks have their LWP set to zero.
Also make sure that the TID is nonzero, as some remotes, when
asked for the list of threads, will return the first thread
as having its TID set to zero. For instance, TSIM version
2.0.48 for LEON3 sends 'm0' as a reply to the 'qfThreadInfo'
query, which the remote protocol layer then treats as a thread
whose TID is 0. This is obviously not a ravenscar task. */
return ptid_get_lwp (ptid) == 0 && ptid_get_tid (ptid) != 0;
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
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}
/* Given PTID, which can be either a ravenscar task or a CPU thread,
return which CPU that ptid is running on.
This assume that PTID is a valid ptid_t. Otherwise, a gdb_assert
will be triggered. */
static int
ravenscar_get_thread_base_cpu (ptid_t ptid)
{
int base_cpu;
if (is_ravenscar_task (ptid))
{
struct ada_task_info *task_info = ada_get_task_info_from_ptid (ptid);
gdb_assert (task_info != NULL);
base_cpu = task_info->base_cpu;
}
else
{
/* We assume that the LWP of the PTID is equal to the CPU number. */
base_cpu = ptid_get_lwp (ptid);
}
return base_cpu;
}
/* Given a ravenscar task (identified by its ptid_t PTID), return nonzero
if this task is the currently active task on the cpu that task is
running on.
In other words, this function determine which CPU this task is
currently running on, and then return nonzero if the CPU in question
is executing the code for that task. If that's the case, then
that task's registers are in the CPU bank. Otherwise, the task
is currently suspended, and its registers have been saved in memory. */
static int
ravenscar_task_is_currently_active (ptid_t ptid)
{
ptid_t active_task_ptid
= ravenscar_active_task (ravenscar_get_thread_base_cpu (ptid));
return ptid_equal (ptid, active_task_ptid);
}
/* Return the CPU thread (as a ptid_t) on which the given ravenscar
task is running.
This is the thread that corresponds to the CPU on which the task
is running. */
static ptid_t
get_base_thread_from_ravenscar_task (ptid_t ptid)
{
int base_cpu;
if (!is_ravenscar_task (ptid))
return ptid;
base_cpu = ravenscar_get_thread_base_cpu (ptid);
return ptid_build (ptid_get_pid (ptid), base_cpu, 0);
}
/* Fetch the ravenscar running thread from target memory and
update inferior_ptid accordingly. */
static void
ravenscar_update_inferior_ptid (void)
{
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
int base_cpu;
base_ptid = inferior_ptid;
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
gdb_assert (!is_ravenscar_task (inferior_ptid));
base_cpu = ravenscar_get_thread_base_cpu (base_ptid);
/* If the runtime has not been initialized yet, the inferior_ptid is
the only ptid that there is. */
if (!ravenscar_runtime_initialized ())
return;
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
/* Make sure we set base_ptid before calling ravenscar_active_task
as the latter relies on it. */
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
inferior_ptid = ravenscar_active_task (base_cpu);
gdb_assert (!ptid_equal (inferior_ptid, null_ptid));
/* The running thread may not have been added to
Push pruning old threads down to the target When GDB wants to sync the thread list with the target's (e.g., due to "info threads"), it calls update_thread_list: update_thread_list (void) { prune_threads (); target_find_new_threads (); update_threads_executing (); } And then prune_threads does: prune_threads (void) { struct thread_info *tp, *next; for (tp = thread_list; tp; tp = next) { next = tp->next; if (!thread_alive (tp)) delete_thread (tp->ptid); } } Calling thread_live on each thread one by one is expensive. E.g., on Linux, it ends up doing kill(SIG0) once for each thread. Not a big deal, but still a bunch of syscalls... With the remote target, it's cumbersome. That thread_alive call ends up generating one T packet per thread: Sending packet: $Tp2141.2150#82...Packet received: OK Sending packet: $Tp2141.214f#b7...Packet received: OK Sending packet: $Tp2141.2141#82...Packet received: OK Sending packet: $qXfer:threads:read::0,fff#03...Packet received: l<threads>\n<thread id="p2141.2141" core="2"/>\n<thread id="p2141.214f" core="1"/>\n<thread id="p2141.2150" core="2"/>\n</threads>\n That seems a bit silly when target_find_new_threads method implementations will always fetch the whole current set of target threads, and then add those that are not in GDB's thread list, to GDB's thread list. This patch thus pushes down the responsibility of pruning dead threads to the target_find_new_threads method instead, so a target may implement pruning dead threads however it wants. Once we do that, target_find_new_threads becomes a misnomer, so the patch renames it to target_update_thread_list. The patch doesn't attempt to do any optimization to any target yet. It simply exports prune_threads, and makes all implementations of target_update_thread_list call that. It's meant to be a no-op. gdb/ 2014-10-15 Pedro Alves <palves@redhat.com> * ada-tasks.c (print_ada_task_info, task_command_1): Adjust. * bsd-uthread.c (bsd_uthread_find_new_threads): Rename to ... (bsd_uthread_update_thread_list): ... this. Call prune_threads. (bsd_uthread_target): Adjust. * corelow.c (core_open): Adjust. * dec-thread.c (dec_thread_find_new_threads): Update comment. (dec_thread_update_thread_list): New function. (init_dec_thread_ops): Adjust. * gdbthread.h (prune_threads): New declaration. * linux-thread-db.c (thread_db_find_new_threads): Rename to ... (thread_db_update_thread_list): ... this. Call prune_threads. (init_thread_db_ops): Adjust. * nto-procfs.c (procfs_find_new_threads): Rename to ... (procfs_update_thread_list): ... this. Call prune_threads. (procfs_attach, procfs_create_inferior, init_procfs_targets): Adjust. * obsd-nat.c (obsd_find_new_threads): Rename to ... (obsd_update_thread_list): ... this. Call prune_threads. (obsd_add_target): Adjust. * procfs.c (procfs_target): Adjust. (procfs_notice_thread): Update comment. (procfs_find_new_threads): Rename to ... (procfs_update_thread_list): ... this. Call prune_threads. * ravenscar-thread.c (ravenscar_update_inferior_ptid): Update comment. (ravenscar_wait): Adjust. (ravenscar_find_new_threads): Rename to ... (ravenscar_update_thread_list): ... this. Call prune_threads. (init_ravenscar_thread_ops): Adjust. * record-btrace.c (record_btrace_find_new_threads): Rename to ... (record_btrace_update_thread_list): ... this. Adjust comment. (init_record_btrace_ops): Adjust. * remote.c (remote_threads_info): Rename to ... (remote_update_thread_list): ... this. Call prune_threads. (remote_start_remote, extended_remote_attach_1, init_remote_ops): Adjust. * sol-thread.c (check_for_thread_db): Adjust. (sol_find_new_threads_callback): Rename to ... (sol_update_thread_list_callback): ... this. (sol_find_new_threads): Rename to ... (sol_update_thread_list): ... this. Call prune_threads. Adjust. (sol_get_ada_task_ptid, init_sol_thread_ops): Adjust. * target-delegates.c: Regenerate. * target.c (target_find_new_threads): Rename to ... (target_update_thread_list): ... this. * target.h (struct target_ops): Rename to_find_new_threads field to to_update_thread_list. (target_find_new_threads): Rename to ... (target_update_thread_list): ... this. * thread.c (prune_threads): Make extern. (update_thread_list): Adjust.
2014-10-15 23:44:00 +02:00
system.tasking.debug's list yet; so ravenscar_update_thread_list
may not always add it to the thread list. Add it here. */
if (!find_thread_ptid (inferior_ptid))
add_thread (inferior_ptid);
}
/* The Ravenscar Runtime exports a symbol which contains the ID of
the thread that is currently running. Try to locate that symbol
and return its associated minimal symbol.
Return NULL if not found. */
use bound_minsym as result for lookup_minimal_symbol et al This patch changes a few minimal symbol lookup functions to return a bound_minimal_symbol rather than a pointer to the minsym. This change helps prepare gdb for computing a minimal symbol's address at the point of use. Note that this changes even those functions that ostensibly search a single objfile. That was necessary because, in fact, those functions can search an objfile and its separate debug objfiles; and it is important for the caller to know in which objfile the minimal symbol was actually found. The bulk of this patch is mechanical. 2014-02-26 Tom Tromey <tromey@redhat.com> * ada-lang.c (ada_update_initial_language): Update. (ada_main_name, ada_has_this_exception_support): Update. * ada-tasks.c (ada_tasks_inferior_data_sniffer): Update. * aix-thread.c (pdc_symbol_addrs, pd_enable): Update. * arm-tdep.c (arm_skip_stub): Update. * auxv.c (ld_so_xfer_auxv): Update. * avr-tdep.c (avr_scan_prologue): Update. * ax-gdb.c (gen_var_ref): Update. * breakpoint.c (struct breakpoint_objfile_data) <overlay_msym, longjmp_msym, terminate_msym, exception_msym>: Change type to bound_minimal_symbol. (create_overlay_event_breakpoint) (create_longjmp_master_breakpoint) (create_std_terminate_master_breakpoint) (create_exception_master_breakpoint): Update. * bsd-uthread.c (bsd_uthread_lookup_address): Update. * c-exp.y (classify_name): Update. * coffread.c (coff_symfile_read): Update. * common/agent.c (agent_look_up_symbols): Update. * d-lang.c (d_main_name): Update. * dbxread.c (find_stab_function_addr, end_psymtab): Update. * dec-thread.c (enable_dec_thread): Update. * dwarf2loc.c (call_site_to_target_addr): Update. * elfread.c (elf_gnu_ifunc_resolve_by_got): Update. * eval.c (evaluate_subexp_standard): Update. * findvar.c (struct minsym_lookup_data) <result>: Change type to bound_minimal_symbol. <objfile>: Remove. (minsym_lookup_iterator_cb, default_read_var_value): Update. * frame.c (inside_main_func): Update. * frv-tdep.c (frv_frame_this_id): Update. * gcore.c (call_target_sbrk): Update. * glibc-tdep.c (glibc_skip_solib_resolver): Update. * gnu-v3-abi.c (gnuv3_get_typeid, gnuv3_skip_trampoline): Update. * go-lang.c (go_main_name): Update. * hppa-hpux-tdep.c (hppa_hpux_skip_trampoline_code) (hppa_hpux_find_import_stub_for_addr): Update. * hppa-tdep.c (hppa_extract_17, hppa_lookup_stub_minimal_symbol): Update. Change return type. * hppa-tdep.h (hppa_lookup_stub_minimal_symbol): Change return type. * jit.c (jit_breakpoint_re_set_internal): Update. * linux-fork.c (inferior_call_waitpid, checkpoint_command): Update. * linux-nat.c (get_signo): Update. * linux-thread-db.c (inferior_has_bug): Update * m32c-tdep.c (m32c_return_value) (m32c_m16c_address_to_pointer): Update. * m32r-tdep.c (m32r_frame_this_id): Update. * m68hc11-tdep.c (m68hc11_get_register_info): Update. * machoread.c (macho_resolve_oso_sym_with_minsym): Update. * minsyms.c (lookup_minimal_symbol_internal): Rename to lookup_minimal_symbol. Change return type. (lookup_minimal_symbol): Remove. (lookup_bound_minimal_symbol): Update. (lookup_minimal_symbol_text): Change return type. (lookup_minimal_symbol_solib_trampoline): Change return type. * minsyms.h (lookup_minimal_symbol, lookup_minimal_symbol_text) (lookup_minimal_symbol_solib_trampoline): Change return type. * mips-linux-tdep.c (mips_linux_skip_resolver): Update. * objc-lang.c (lookup_objc_class, lookup_child_selector) (value_nsstring, find_imps): Update. * obsd-tdep.c (obsd_skip_solib_resolver): Update. * p-lang.c (pascal_main_name): Update. * ppc-linux-tdep.c (ppc_linux_spe_context_lookup): Update. * ppc-sysv-tdep.c (convert_code_addr_to_desc_addr): Update. * proc-service.c (ps_pglobal_lookup): Update. * ravenscar-thread.c (get_running_thread_msymbol): Change return type. (has_ravenscar_runtime, get_running_thread_id): Update. * remote.c (remote_check_symbols): Update. * sol-thread.c (ps_pglobal_lookup): Update. * sol2-tdep.c (sol2_skip_solib_resolver): Update. * solib-dsbt.c (lm_base): Update. * solib-frv.c (lm_base, frv_relocate_section_addresses): Update. * solib-irix.c (locate_base): Update. * solib-som.c (som_solib_create_inferior_hook) (som_solib_desire_dynamic_linker_symbols, link_map_start): Update. * solib-spu.c (spu_enable_break): Update. * solib-svr4.c (elf_locate_base, enable_break): Update. * spu-tdep.c (spu_get_overlay_table, spu_catch_start) (flush_ea_cache): Update. * stabsread.c (define_symbol): Update. * symfile.c (simple_read_overlay_table): Update. * symtab.c (find_pc_sect_line): Update. * tracepoint.c (scope_info): Update. * tui-disasm.c (tui_get_begin_asm_address): Update. * value.c (value_static_field): Update.
2013-10-15 03:53:29 +02:00
static struct bound_minimal_symbol
get_running_thread_msymbol (void)
{
use bound_minsym as result for lookup_minimal_symbol et al This patch changes a few minimal symbol lookup functions to return a bound_minimal_symbol rather than a pointer to the minsym. This change helps prepare gdb for computing a minimal symbol's address at the point of use. Note that this changes even those functions that ostensibly search a single objfile. That was necessary because, in fact, those functions can search an objfile and its separate debug objfiles; and it is important for the caller to know in which objfile the minimal symbol was actually found. The bulk of this patch is mechanical. 2014-02-26 Tom Tromey <tromey@redhat.com> * ada-lang.c (ada_update_initial_language): Update. (ada_main_name, ada_has_this_exception_support): Update. * ada-tasks.c (ada_tasks_inferior_data_sniffer): Update. * aix-thread.c (pdc_symbol_addrs, pd_enable): Update. * arm-tdep.c (arm_skip_stub): Update. * auxv.c (ld_so_xfer_auxv): Update. * avr-tdep.c (avr_scan_prologue): Update. * ax-gdb.c (gen_var_ref): Update. * breakpoint.c (struct breakpoint_objfile_data) <overlay_msym, longjmp_msym, terminate_msym, exception_msym>: Change type to bound_minimal_symbol. (create_overlay_event_breakpoint) (create_longjmp_master_breakpoint) (create_std_terminate_master_breakpoint) (create_exception_master_breakpoint): Update. * bsd-uthread.c (bsd_uthread_lookup_address): Update. * c-exp.y (classify_name): Update. * coffread.c (coff_symfile_read): Update. * common/agent.c (agent_look_up_symbols): Update. * d-lang.c (d_main_name): Update. * dbxread.c (find_stab_function_addr, end_psymtab): Update. * dec-thread.c (enable_dec_thread): Update. * dwarf2loc.c (call_site_to_target_addr): Update. * elfread.c (elf_gnu_ifunc_resolve_by_got): Update. * eval.c (evaluate_subexp_standard): Update. * findvar.c (struct minsym_lookup_data) <result>: Change type to bound_minimal_symbol. <objfile>: Remove. (minsym_lookup_iterator_cb, default_read_var_value): Update. * frame.c (inside_main_func): Update. * frv-tdep.c (frv_frame_this_id): Update. * gcore.c (call_target_sbrk): Update. * glibc-tdep.c (glibc_skip_solib_resolver): Update. * gnu-v3-abi.c (gnuv3_get_typeid, gnuv3_skip_trampoline): Update. * go-lang.c (go_main_name): Update. * hppa-hpux-tdep.c (hppa_hpux_skip_trampoline_code) (hppa_hpux_find_import_stub_for_addr): Update. * hppa-tdep.c (hppa_extract_17, hppa_lookup_stub_minimal_symbol): Update. Change return type. * hppa-tdep.h (hppa_lookup_stub_minimal_symbol): Change return type. * jit.c (jit_breakpoint_re_set_internal): Update. * linux-fork.c (inferior_call_waitpid, checkpoint_command): Update. * linux-nat.c (get_signo): Update. * linux-thread-db.c (inferior_has_bug): Update * m32c-tdep.c (m32c_return_value) (m32c_m16c_address_to_pointer): Update. * m32r-tdep.c (m32r_frame_this_id): Update. * m68hc11-tdep.c (m68hc11_get_register_info): Update. * machoread.c (macho_resolve_oso_sym_with_minsym): Update. * minsyms.c (lookup_minimal_symbol_internal): Rename to lookup_minimal_symbol. Change return type. (lookup_minimal_symbol): Remove. (lookup_bound_minimal_symbol): Update. (lookup_minimal_symbol_text): Change return type. (lookup_minimal_symbol_solib_trampoline): Change return type. * minsyms.h (lookup_minimal_symbol, lookup_minimal_symbol_text) (lookup_minimal_symbol_solib_trampoline): Change return type. * mips-linux-tdep.c (mips_linux_skip_resolver): Update. * objc-lang.c (lookup_objc_class, lookup_child_selector) (value_nsstring, find_imps): Update. * obsd-tdep.c (obsd_skip_solib_resolver): Update. * p-lang.c (pascal_main_name): Update. * ppc-linux-tdep.c (ppc_linux_spe_context_lookup): Update. * ppc-sysv-tdep.c (convert_code_addr_to_desc_addr): Update. * proc-service.c (ps_pglobal_lookup): Update. * ravenscar-thread.c (get_running_thread_msymbol): Change return type. (has_ravenscar_runtime, get_running_thread_id): Update. * remote.c (remote_check_symbols): Update. * sol-thread.c (ps_pglobal_lookup): Update. * sol2-tdep.c (sol2_skip_solib_resolver): Update. * solib-dsbt.c (lm_base): Update. * solib-frv.c (lm_base, frv_relocate_section_addresses): Update. * solib-irix.c (locate_base): Update. * solib-som.c (som_solib_create_inferior_hook) (som_solib_desire_dynamic_linker_symbols, link_map_start): Update. * solib-spu.c (spu_enable_break): Update. * solib-svr4.c (elf_locate_base, enable_break): Update. * spu-tdep.c (spu_get_overlay_table, spu_catch_start) (flush_ea_cache): Update. * stabsread.c (define_symbol): Update. * symfile.c (simple_read_overlay_table): Update. * symtab.c (find_pc_sect_line): Update. * tracepoint.c (scope_info): Update. * tui-disasm.c (tui_get_begin_asm_address): Update. * value.c (value_static_field): Update.
2013-10-15 03:53:29 +02:00
struct bound_minimal_symbol msym;
msym = lookup_minimal_symbol (running_thread_name, NULL, NULL);
use bound_minsym as result for lookup_minimal_symbol et al This patch changes a few minimal symbol lookup functions to return a bound_minimal_symbol rather than a pointer to the minsym. This change helps prepare gdb for computing a minimal symbol's address at the point of use. Note that this changes even those functions that ostensibly search a single objfile. That was necessary because, in fact, those functions can search an objfile and its separate debug objfiles; and it is important for the caller to know in which objfile the minimal symbol was actually found. The bulk of this patch is mechanical. 2014-02-26 Tom Tromey <tromey@redhat.com> * ada-lang.c (ada_update_initial_language): Update. (ada_main_name, ada_has_this_exception_support): Update. * ada-tasks.c (ada_tasks_inferior_data_sniffer): Update. * aix-thread.c (pdc_symbol_addrs, pd_enable): Update. * arm-tdep.c (arm_skip_stub): Update. * auxv.c (ld_so_xfer_auxv): Update. * avr-tdep.c (avr_scan_prologue): Update. * ax-gdb.c (gen_var_ref): Update. * breakpoint.c (struct breakpoint_objfile_data) <overlay_msym, longjmp_msym, terminate_msym, exception_msym>: Change type to bound_minimal_symbol. (create_overlay_event_breakpoint) (create_longjmp_master_breakpoint) (create_std_terminate_master_breakpoint) (create_exception_master_breakpoint): Update. * bsd-uthread.c (bsd_uthread_lookup_address): Update. * c-exp.y (classify_name): Update. * coffread.c (coff_symfile_read): Update. * common/agent.c (agent_look_up_symbols): Update. * d-lang.c (d_main_name): Update. * dbxread.c (find_stab_function_addr, end_psymtab): Update. * dec-thread.c (enable_dec_thread): Update. * dwarf2loc.c (call_site_to_target_addr): Update. * elfread.c (elf_gnu_ifunc_resolve_by_got): Update. * eval.c (evaluate_subexp_standard): Update. * findvar.c (struct minsym_lookup_data) <result>: Change type to bound_minimal_symbol. <objfile>: Remove. (minsym_lookup_iterator_cb, default_read_var_value): Update. * frame.c (inside_main_func): Update. * frv-tdep.c (frv_frame_this_id): Update. * gcore.c (call_target_sbrk): Update. * glibc-tdep.c (glibc_skip_solib_resolver): Update. * gnu-v3-abi.c (gnuv3_get_typeid, gnuv3_skip_trampoline): Update. * go-lang.c (go_main_name): Update. * hppa-hpux-tdep.c (hppa_hpux_skip_trampoline_code) (hppa_hpux_find_import_stub_for_addr): Update. * hppa-tdep.c (hppa_extract_17, hppa_lookup_stub_minimal_symbol): Update. Change return type. * hppa-tdep.h (hppa_lookup_stub_minimal_symbol): Change return type. * jit.c (jit_breakpoint_re_set_internal): Update. * linux-fork.c (inferior_call_waitpid, checkpoint_command): Update. * linux-nat.c (get_signo): Update. * linux-thread-db.c (inferior_has_bug): Update * m32c-tdep.c (m32c_return_value) (m32c_m16c_address_to_pointer): Update. * m32r-tdep.c (m32r_frame_this_id): Update. * m68hc11-tdep.c (m68hc11_get_register_info): Update. * machoread.c (macho_resolve_oso_sym_with_minsym): Update. * minsyms.c (lookup_minimal_symbol_internal): Rename to lookup_minimal_symbol. Change return type. (lookup_minimal_symbol): Remove. (lookup_bound_minimal_symbol): Update. (lookup_minimal_symbol_text): Change return type. (lookup_minimal_symbol_solib_trampoline): Change return type. * minsyms.h (lookup_minimal_symbol, lookup_minimal_symbol_text) (lookup_minimal_symbol_solib_trampoline): Change return type. * mips-linux-tdep.c (mips_linux_skip_resolver): Update. * objc-lang.c (lookup_objc_class, lookup_child_selector) (value_nsstring, find_imps): Update. * obsd-tdep.c (obsd_skip_solib_resolver): Update. * p-lang.c (pascal_main_name): Update. * ppc-linux-tdep.c (ppc_linux_spe_context_lookup): Update. * ppc-sysv-tdep.c (convert_code_addr_to_desc_addr): Update. * proc-service.c (ps_pglobal_lookup): Update. * ravenscar-thread.c (get_running_thread_msymbol): Change return type. (has_ravenscar_runtime, get_running_thread_id): Update. * remote.c (remote_check_symbols): Update. * sol-thread.c (ps_pglobal_lookup): Update. * sol2-tdep.c (sol2_skip_solib_resolver): Update. * solib-dsbt.c (lm_base): Update. * solib-frv.c (lm_base, frv_relocate_section_addresses): Update. * solib-irix.c (locate_base): Update. * solib-som.c (som_solib_create_inferior_hook) (som_solib_desire_dynamic_linker_symbols, link_map_start): Update. * solib-spu.c (spu_enable_break): Update. * solib-svr4.c (elf_locate_base, enable_break): Update. * spu-tdep.c (spu_get_overlay_table, spu_catch_start) (flush_ea_cache): Update. * stabsread.c (define_symbol): Update. * symfile.c (simple_read_overlay_table): Update. * symtab.c (find_pc_sect_line): Update. * tracepoint.c (scope_info): Update. * tui-disasm.c (tui_get_begin_asm_address): Update. * value.c (value_static_field): Update.
2013-10-15 03:53:29 +02:00
if (!msym.minsym)
/* Older versions of the GNAT runtime were using a different
(less ideal) name for the symbol where the active thread ID
is stored. If we couldn't find the symbol using the latest
name, then try the old one. */
msym = lookup_minimal_symbol ("running_thread", NULL, NULL);
return msym;
}
/* Return True if the Ada Ravenscar run-time can be found in the
application. */
static int
has_ravenscar_runtime (void)
{
use bound_minsym as result for lookup_minimal_symbol et al This patch changes a few minimal symbol lookup functions to return a bound_minimal_symbol rather than a pointer to the minsym. This change helps prepare gdb for computing a minimal symbol's address at the point of use. Note that this changes even those functions that ostensibly search a single objfile. That was necessary because, in fact, those functions can search an objfile and its separate debug objfiles; and it is important for the caller to know in which objfile the minimal symbol was actually found. The bulk of this patch is mechanical. 2014-02-26 Tom Tromey <tromey@redhat.com> * ada-lang.c (ada_update_initial_language): Update. (ada_main_name, ada_has_this_exception_support): Update. * ada-tasks.c (ada_tasks_inferior_data_sniffer): Update. * aix-thread.c (pdc_symbol_addrs, pd_enable): Update. * arm-tdep.c (arm_skip_stub): Update. * auxv.c (ld_so_xfer_auxv): Update. * avr-tdep.c (avr_scan_prologue): Update. * ax-gdb.c (gen_var_ref): Update. * breakpoint.c (struct breakpoint_objfile_data) <overlay_msym, longjmp_msym, terminate_msym, exception_msym>: Change type to bound_minimal_symbol. (create_overlay_event_breakpoint) (create_longjmp_master_breakpoint) (create_std_terminate_master_breakpoint) (create_exception_master_breakpoint): Update. * bsd-uthread.c (bsd_uthread_lookup_address): Update. * c-exp.y (classify_name): Update. * coffread.c (coff_symfile_read): Update. * common/agent.c (agent_look_up_symbols): Update. * d-lang.c (d_main_name): Update. * dbxread.c (find_stab_function_addr, end_psymtab): Update. * dec-thread.c (enable_dec_thread): Update. * dwarf2loc.c (call_site_to_target_addr): Update. * elfread.c (elf_gnu_ifunc_resolve_by_got): Update. * eval.c (evaluate_subexp_standard): Update. * findvar.c (struct minsym_lookup_data) <result>: Change type to bound_minimal_symbol. <objfile>: Remove. (minsym_lookup_iterator_cb, default_read_var_value): Update. * frame.c (inside_main_func): Update. * frv-tdep.c (frv_frame_this_id): Update. * gcore.c (call_target_sbrk): Update. * glibc-tdep.c (glibc_skip_solib_resolver): Update. * gnu-v3-abi.c (gnuv3_get_typeid, gnuv3_skip_trampoline): Update. * go-lang.c (go_main_name): Update. * hppa-hpux-tdep.c (hppa_hpux_skip_trampoline_code) (hppa_hpux_find_import_stub_for_addr): Update. * hppa-tdep.c (hppa_extract_17, hppa_lookup_stub_minimal_symbol): Update. Change return type. * hppa-tdep.h (hppa_lookup_stub_minimal_symbol): Change return type. * jit.c (jit_breakpoint_re_set_internal): Update. * linux-fork.c (inferior_call_waitpid, checkpoint_command): Update. * linux-nat.c (get_signo): Update. * linux-thread-db.c (inferior_has_bug): Update * m32c-tdep.c (m32c_return_value) (m32c_m16c_address_to_pointer): Update. * m32r-tdep.c (m32r_frame_this_id): Update. * m68hc11-tdep.c (m68hc11_get_register_info): Update. * machoread.c (macho_resolve_oso_sym_with_minsym): Update. * minsyms.c (lookup_minimal_symbol_internal): Rename to lookup_minimal_symbol. Change return type. (lookup_minimal_symbol): Remove. (lookup_bound_minimal_symbol): Update. (lookup_minimal_symbol_text): Change return type. (lookup_minimal_symbol_solib_trampoline): Change return type. * minsyms.h (lookup_minimal_symbol, lookup_minimal_symbol_text) (lookup_minimal_symbol_solib_trampoline): Change return type. * mips-linux-tdep.c (mips_linux_skip_resolver): Update. * objc-lang.c (lookup_objc_class, lookup_child_selector) (value_nsstring, find_imps): Update. * obsd-tdep.c (obsd_skip_solib_resolver): Update. * p-lang.c (pascal_main_name): Update. * ppc-linux-tdep.c (ppc_linux_spe_context_lookup): Update. * ppc-sysv-tdep.c (convert_code_addr_to_desc_addr): Update. * proc-service.c (ps_pglobal_lookup): Update. * ravenscar-thread.c (get_running_thread_msymbol): Change return type. (has_ravenscar_runtime, get_running_thread_id): Update. * remote.c (remote_check_symbols): Update. * sol-thread.c (ps_pglobal_lookup): Update. * sol2-tdep.c (sol2_skip_solib_resolver): Update. * solib-dsbt.c (lm_base): Update. * solib-frv.c (lm_base, frv_relocate_section_addresses): Update. * solib-irix.c (locate_base): Update. * solib-som.c (som_solib_create_inferior_hook) (som_solib_desire_dynamic_linker_symbols, link_map_start): Update. * solib-spu.c (spu_enable_break): Update. * solib-svr4.c (elf_locate_base, enable_break): Update. * spu-tdep.c (spu_get_overlay_table, spu_catch_start) (flush_ea_cache): Update. * stabsread.c (define_symbol): Update. * symfile.c (simple_read_overlay_table): Update. * symtab.c (find_pc_sect_line): Update. * tracepoint.c (scope_info): Update. * tui-disasm.c (tui_get_begin_asm_address): Update. * value.c (value_static_field): Update.
2013-10-15 03:53:29 +02:00
struct bound_minimal_symbol msym_ravenscar_runtime_initializer =
lookup_minimal_symbol (ravenscar_runtime_initializer, NULL, NULL);
use bound_minsym as result for lookup_minimal_symbol et al This patch changes a few minimal symbol lookup functions to return a bound_minimal_symbol rather than a pointer to the minsym. This change helps prepare gdb for computing a minimal symbol's address at the point of use. Note that this changes even those functions that ostensibly search a single objfile. That was necessary because, in fact, those functions can search an objfile and its separate debug objfiles; and it is important for the caller to know in which objfile the minimal symbol was actually found. The bulk of this patch is mechanical. 2014-02-26 Tom Tromey <tromey@redhat.com> * ada-lang.c (ada_update_initial_language): Update. (ada_main_name, ada_has_this_exception_support): Update. * ada-tasks.c (ada_tasks_inferior_data_sniffer): Update. * aix-thread.c (pdc_symbol_addrs, pd_enable): Update. * arm-tdep.c (arm_skip_stub): Update. * auxv.c (ld_so_xfer_auxv): Update. * avr-tdep.c (avr_scan_prologue): Update. * ax-gdb.c (gen_var_ref): Update. * breakpoint.c (struct breakpoint_objfile_data) <overlay_msym, longjmp_msym, terminate_msym, exception_msym>: Change type to bound_minimal_symbol. (create_overlay_event_breakpoint) (create_longjmp_master_breakpoint) (create_std_terminate_master_breakpoint) (create_exception_master_breakpoint): Update. * bsd-uthread.c (bsd_uthread_lookup_address): Update. * c-exp.y (classify_name): Update. * coffread.c (coff_symfile_read): Update. * common/agent.c (agent_look_up_symbols): Update. * d-lang.c (d_main_name): Update. * dbxread.c (find_stab_function_addr, end_psymtab): Update. * dec-thread.c (enable_dec_thread): Update. * dwarf2loc.c (call_site_to_target_addr): Update. * elfread.c (elf_gnu_ifunc_resolve_by_got): Update. * eval.c (evaluate_subexp_standard): Update. * findvar.c (struct minsym_lookup_data) <result>: Change type to bound_minimal_symbol. <objfile>: Remove. (minsym_lookup_iterator_cb, default_read_var_value): Update. * frame.c (inside_main_func): Update. * frv-tdep.c (frv_frame_this_id): Update. * gcore.c (call_target_sbrk): Update. * glibc-tdep.c (glibc_skip_solib_resolver): Update. * gnu-v3-abi.c (gnuv3_get_typeid, gnuv3_skip_trampoline): Update. * go-lang.c (go_main_name): Update. * hppa-hpux-tdep.c (hppa_hpux_skip_trampoline_code) (hppa_hpux_find_import_stub_for_addr): Update. * hppa-tdep.c (hppa_extract_17, hppa_lookup_stub_minimal_symbol): Update. Change return type. * hppa-tdep.h (hppa_lookup_stub_minimal_symbol): Change return type. * jit.c (jit_breakpoint_re_set_internal): Update. * linux-fork.c (inferior_call_waitpid, checkpoint_command): Update. * linux-nat.c (get_signo): Update. * linux-thread-db.c (inferior_has_bug): Update * m32c-tdep.c (m32c_return_value) (m32c_m16c_address_to_pointer): Update. * m32r-tdep.c (m32r_frame_this_id): Update. * m68hc11-tdep.c (m68hc11_get_register_info): Update. * machoread.c (macho_resolve_oso_sym_with_minsym): Update. * minsyms.c (lookup_minimal_symbol_internal): Rename to lookup_minimal_symbol. Change return type. (lookup_minimal_symbol): Remove. (lookup_bound_minimal_symbol): Update. (lookup_minimal_symbol_text): Change return type. (lookup_minimal_symbol_solib_trampoline): Change return type. * minsyms.h (lookup_minimal_symbol, lookup_minimal_symbol_text) (lookup_minimal_symbol_solib_trampoline): Change return type. * mips-linux-tdep.c (mips_linux_skip_resolver): Update. * objc-lang.c (lookup_objc_class, lookup_child_selector) (value_nsstring, find_imps): Update. * obsd-tdep.c (obsd_skip_solib_resolver): Update. * p-lang.c (pascal_main_name): Update. * ppc-linux-tdep.c (ppc_linux_spe_context_lookup): Update. * ppc-sysv-tdep.c (convert_code_addr_to_desc_addr): Update. * proc-service.c (ps_pglobal_lookup): Update. * ravenscar-thread.c (get_running_thread_msymbol): Change return type. (has_ravenscar_runtime, get_running_thread_id): Update. * remote.c (remote_check_symbols): Update. * sol-thread.c (ps_pglobal_lookup): Update. * sol2-tdep.c (sol2_skip_solib_resolver): Update. * solib-dsbt.c (lm_base): Update. * solib-frv.c (lm_base, frv_relocate_section_addresses): Update. * solib-irix.c (locate_base): Update. * solib-som.c (som_solib_create_inferior_hook) (som_solib_desire_dynamic_linker_symbols, link_map_start): Update. * solib-spu.c (spu_enable_break): Update. * solib-svr4.c (elf_locate_base, enable_break): Update. * spu-tdep.c (spu_get_overlay_table, spu_catch_start) (flush_ea_cache): Update. * stabsread.c (define_symbol): Update. * symfile.c (simple_read_overlay_table): Update. * symtab.c (find_pc_sect_line): Update. * tracepoint.c (scope_info): Update. * tui-disasm.c (tui_get_begin_asm_address): Update. * value.c (value_static_field): Update.
2013-10-15 03:53:29 +02:00
struct bound_minimal_symbol msym_known_tasks =
lookup_minimal_symbol (known_tasks_name, NULL, NULL);
use bound_minsym as result for lookup_minimal_symbol et al This patch changes a few minimal symbol lookup functions to return a bound_minimal_symbol rather than a pointer to the minsym. This change helps prepare gdb for computing a minimal symbol's address at the point of use. Note that this changes even those functions that ostensibly search a single objfile. That was necessary because, in fact, those functions can search an objfile and its separate debug objfiles; and it is important for the caller to know in which objfile the minimal symbol was actually found. The bulk of this patch is mechanical. 2014-02-26 Tom Tromey <tromey@redhat.com> * ada-lang.c (ada_update_initial_language): Update. (ada_main_name, ada_has_this_exception_support): Update. * ada-tasks.c (ada_tasks_inferior_data_sniffer): Update. * aix-thread.c (pdc_symbol_addrs, pd_enable): Update. * arm-tdep.c (arm_skip_stub): Update. * auxv.c (ld_so_xfer_auxv): Update. * avr-tdep.c (avr_scan_prologue): Update. * ax-gdb.c (gen_var_ref): Update. * breakpoint.c (struct breakpoint_objfile_data) <overlay_msym, longjmp_msym, terminate_msym, exception_msym>: Change type to bound_minimal_symbol. (create_overlay_event_breakpoint) (create_longjmp_master_breakpoint) (create_std_terminate_master_breakpoint) (create_exception_master_breakpoint): Update. * bsd-uthread.c (bsd_uthread_lookup_address): Update. * c-exp.y (classify_name): Update. * coffread.c (coff_symfile_read): Update. * common/agent.c (agent_look_up_symbols): Update. * d-lang.c (d_main_name): Update. * dbxread.c (find_stab_function_addr, end_psymtab): Update. * dec-thread.c (enable_dec_thread): Update. * dwarf2loc.c (call_site_to_target_addr): Update. * elfread.c (elf_gnu_ifunc_resolve_by_got): Update. * eval.c (evaluate_subexp_standard): Update. * findvar.c (struct minsym_lookup_data) <result>: Change type to bound_minimal_symbol. <objfile>: Remove. (minsym_lookup_iterator_cb, default_read_var_value): Update. * frame.c (inside_main_func): Update. * frv-tdep.c (frv_frame_this_id): Update. * gcore.c (call_target_sbrk): Update. * glibc-tdep.c (glibc_skip_solib_resolver): Update. * gnu-v3-abi.c (gnuv3_get_typeid, gnuv3_skip_trampoline): Update. * go-lang.c (go_main_name): Update. * hppa-hpux-tdep.c (hppa_hpux_skip_trampoline_code) (hppa_hpux_find_import_stub_for_addr): Update. * hppa-tdep.c (hppa_extract_17, hppa_lookup_stub_minimal_symbol): Update. Change return type. * hppa-tdep.h (hppa_lookup_stub_minimal_symbol): Change return type. * jit.c (jit_breakpoint_re_set_internal): Update. * linux-fork.c (inferior_call_waitpid, checkpoint_command): Update. * linux-nat.c (get_signo): Update. * linux-thread-db.c (inferior_has_bug): Update * m32c-tdep.c (m32c_return_value) (m32c_m16c_address_to_pointer): Update. * m32r-tdep.c (m32r_frame_this_id): Update. * m68hc11-tdep.c (m68hc11_get_register_info): Update. * machoread.c (macho_resolve_oso_sym_with_minsym): Update. * minsyms.c (lookup_minimal_symbol_internal): Rename to lookup_minimal_symbol. Change return type. (lookup_minimal_symbol): Remove. (lookup_bound_minimal_symbol): Update. (lookup_minimal_symbol_text): Change return type. (lookup_minimal_symbol_solib_trampoline): Change return type. * minsyms.h (lookup_minimal_symbol, lookup_minimal_symbol_text) (lookup_minimal_symbol_solib_trampoline): Change return type. * mips-linux-tdep.c (mips_linux_skip_resolver): Update. * objc-lang.c (lookup_objc_class, lookup_child_selector) (value_nsstring, find_imps): Update. * obsd-tdep.c (obsd_skip_solib_resolver): Update. * p-lang.c (pascal_main_name): Update. * ppc-linux-tdep.c (ppc_linux_spe_context_lookup): Update. * ppc-sysv-tdep.c (convert_code_addr_to_desc_addr): Update. * proc-service.c (ps_pglobal_lookup): Update. * ravenscar-thread.c (get_running_thread_msymbol): Change return type. (has_ravenscar_runtime, get_running_thread_id): Update. * remote.c (remote_check_symbols): Update. * sol-thread.c (ps_pglobal_lookup): Update. * sol2-tdep.c (sol2_skip_solib_resolver): Update. * solib-dsbt.c (lm_base): Update. * solib-frv.c (lm_base, frv_relocate_section_addresses): Update. * solib-irix.c (locate_base): Update. * solib-som.c (som_solib_create_inferior_hook) (som_solib_desire_dynamic_linker_symbols, link_map_start): Update. * solib-spu.c (spu_enable_break): Update. * solib-svr4.c (elf_locate_base, enable_break): Update. * spu-tdep.c (spu_get_overlay_table, spu_catch_start) (flush_ea_cache): Update. * stabsread.c (define_symbol): Update. * symfile.c (simple_read_overlay_table): Update. * symtab.c (find_pc_sect_line): Update. * tracepoint.c (scope_info): Update. * tui-disasm.c (tui_get_begin_asm_address): Update. * value.c (value_static_field): Update.
2013-10-15 03:53:29 +02:00
struct bound_minimal_symbol msym_first_task =
lookup_minimal_symbol (first_task_name, NULL, NULL);
use bound_minsym as result for lookup_minimal_symbol et al This patch changes a few minimal symbol lookup functions to return a bound_minimal_symbol rather than a pointer to the minsym. This change helps prepare gdb for computing a minimal symbol's address at the point of use. Note that this changes even those functions that ostensibly search a single objfile. That was necessary because, in fact, those functions can search an objfile and its separate debug objfiles; and it is important for the caller to know in which objfile the minimal symbol was actually found. The bulk of this patch is mechanical. 2014-02-26 Tom Tromey <tromey@redhat.com> * ada-lang.c (ada_update_initial_language): Update. (ada_main_name, ada_has_this_exception_support): Update. * ada-tasks.c (ada_tasks_inferior_data_sniffer): Update. * aix-thread.c (pdc_symbol_addrs, pd_enable): Update. * arm-tdep.c (arm_skip_stub): Update. * auxv.c (ld_so_xfer_auxv): Update. * avr-tdep.c (avr_scan_prologue): Update. * ax-gdb.c (gen_var_ref): Update. * breakpoint.c (struct breakpoint_objfile_data) <overlay_msym, longjmp_msym, terminate_msym, exception_msym>: Change type to bound_minimal_symbol. (create_overlay_event_breakpoint) (create_longjmp_master_breakpoint) (create_std_terminate_master_breakpoint) (create_exception_master_breakpoint): Update. * bsd-uthread.c (bsd_uthread_lookup_address): Update. * c-exp.y (classify_name): Update. * coffread.c (coff_symfile_read): Update. * common/agent.c (agent_look_up_symbols): Update. * d-lang.c (d_main_name): Update. * dbxread.c (find_stab_function_addr, end_psymtab): Update. * dec-thread.c (enable_dec_thread): Update. * dwarf2loc.c (call_site_to_target_addr): Update. * elfread.c (elf_gnu_ifunc_resolve_by_got): Update. * eval.c (evaluate_subexp_standard): Update. * findvar.c (struct minsym_lookup_data) <result>: Change type to bound_minimal_symbol. <objfile>: Remove. (minsym_lookup_iterator_cb, default_read_var_value): Update. * frame.c (inside_main_func): Update. * frv-tdep.c (frv_frame_this_id): Update. * gcore.c (call_target_sbrk): Update. * glibc-tdep.c (glibc_skip_solib_resolver): Update. * gnu-v3-abi.c (gnuv3_get_typeid, gnuv3_skip_trampoline): Update. * go-lang.c (go_main_name): Update. * hppa-hpux-tdep.c (hppa_hpux_skip_trampoline_code) (hppa_hpux_find_import_stub_for_addr): Update. * hppa-tdep.c (hppa_extract_17, hppa_lookup_stub_minimal_symbol): Update. Change return type. * hppa-tdep.h (hppa_lookup_stub_minimal_symbol): Change return type. * jit.c (jit_breakpoint_re_set_internal): Update. * linux-fork.c (inferior_call_waitpid, checkpoint_command): Update. * linux-nat.c (get_signo): Update. * linux-thread-db.c (inferior_has_bug): Update * m32c-tdep.c (m32c_return_value) (m32c_m16c_address_to_pointer): Update. * m32r-tdep.c (m32r_frame_this_id): Update. * m68hc11-tdep.c (m68hc11_get_register_info): Update. * machoread.c (macho_resolve_oso_sym_with_minsym): Update. * minsyms.c (lookup_minimal_symbol_internal): Rename to lookup_minimal_symbol. Change return type. (lookup_minimal_symbol): Remove. (lookup_bound_minimal_symbol): Update. (lookup_minimal_symbol_text): Change return type. (lookup_minimal_symbol_solib_trampoline): Change return type. * minsyms.h (lookup_minimal_symbol, lookup_minimal_symbol_text) (lookup_minimal_symbol_solib_trampoline): Change return type. * mips-linux-tdep.c (mips_linux_skip_resolver): Update. * objc-lang.c (lookup_objc_class, lookup_child_selector) (value_nsstring, find_imps): Update. * obsd-tdep.c (obsd_skip_solib_resolver): Update. * p-lang.c (pascal_main_name): Update. * ppc-linux-tdep.c (ppc_linux_spe_context_lookup): Update. * ppc-sysv-tdep.c (convert_code_addr_to_desc_addr): Update. * proc-service.c (ps_pglobal_lookup): Update. * ravenscar-thread.c (get_running_thread_msymbol): Change return type. (has_ravenscar_runtime, get_running_thread_id): Update. * remote.c (remote_check_symbols): Update. * sol-thread.c (ps_pglobal_lookup): Update. * sol2-tdep.c (sol2_skip_solib_resolver): Update. * solib-dsbt.c (lm_base): Update. * solib-frv.c (lm_base, frv_relocate_section_addresses): Update. * solib-irix.c (locate_base): Update. * solib-som.c (som_solib_create_inferior_hook) (som_solib_desire_dynamic_linker_symbols, link_map_start): Update. * solib-spu.c (spu_enable_break): Update. * solib-svr4.c (elf_locate_base, enable_break): Update. * spu-tdep.c (spu_get_overlay_table, spu_catch_start) (flush_ea_cache): Update. * stabsread.c (define_symbol): Update. * symfile.c (simple_read_overlay_table): Update. * symtab.c (find_pc_sect_line): Update. * tracepoint.c (scope_info): Update. * tui-disasm.c (tui_get_begin_asm_address): Update. * value.c (value_static_field): Update.
2013-10-15 03:53:29 +02:00
struct bound_minimal_symbol msym_running_thread
= get_running_thread_msymbol ();
use bound_minsym as result for lookup_minimal_symbol et al This patch changes a few minimal symbol lookup functions to return a bound_minimal_symbol rather than a pointer to the minsym. This change helps prepare gdb for computing a minimal symbol's address at the point of use. Note that this changes even those functions that ostensibly search a single objfile. That was necessary because, in fact, those functions can search an objfile and its separate debug objfiles; and it is important for the caller to know in which objfile the minimal symbol was actually found. The bulk of this patch is mechanical. 2014-02-26 Tom Tromey <tromey@redhat.com> * ada-lang.c (ada_update_initial_language): Update. (ada_main_name, ada_has_this_exception_support): Update. * ada-tasks.c (ada_tasks_inferior_data_sniffer): Update. * aix-thread.c (pdc_symbol_addrs, pd_enable): Update. * arm-tdep.c (arm_skip_stub): Update. * auxv.c (ld_so_xfer_auxv): Update. * avr-tdep.c (avr_scan_prologue): Update. * ax-gdb.c (gen_var_ref): Update. * breakpoint.c (struct breakpoint_objfile_data) <overlay_msym, longjmp_msym, terminate_msym, exception_msym>: Change type to bound_minimal_symbol. (create_overlay_event_breakpoint) (create_longjmp_master_breakpoint) (create_std_terminate_master_breakpoint) (create_exception_master_breakpoint): Update. * bsd-uthread.c (bsd_uthread_lookup_address): Update. * c-exp.y (classify_name): Update. * coffread.c (coff_symfile_read): Update. * common/agent.c (agent_look_up_symbols): Update. * d-lang.c (d_main_name): Update. * dbxread.c (find_stab_function_addr, end_psymtab): Update. * dec-thread.c (enable_dec_thread): Update. * dwarf2loc.c (call_site_to_target_addr): Update. * elfread.c (elf_gnu_ifunc_resolve_by_got): Update. * eval.c (evaluate_subexp_standard): Update. * findvar.c (struct minsym_lookup_data) <result>: Change type to bound_minimal_symbol. <objfile>: Remove. (minsym_lookup_iterator_cb, default_read_var_value): Update. * frame.c (inside_main_func): Update. * frv-tdep.c (frv_frame_this_id): Update. * gcore.c (call_target_sbrk): Update. * glibc-tdep.c (glibc_skip_solib_resolver): Update. * gnu-v3-abi.c (gnuv3_get_typeid, gnuv3_skip_trampoline): Update. * go-lang.c (go_main_name): Update. * hppa-hpux-tdep.c (hppa_hpux_skip_trampoline_code) (hppa_hpux_find_import_stub_for_addr): Update. * hppa-tdep.c (hppa_extract_17, hppa_lookup_stub_minimal_symbol): Update. Change return type. * hppa-tdep.h (hppa_lookup_stub_minimal_symbol): Change return type. * jit.c (jit_breakpoint_re_set_internal): Update. * linux-fork.c (inferior_call_waitpid, checkpoint_command): Update. * linux-nat.c (get_signo): Update. * linux-thread-db.c (inferior_has_bug): Update * m32c-tdep.c (m32c_return_value) (m32c_m16c_address_to_pointer): Update. * m32r-tdep.c (m32r_frame_this_id): Update. * m68hc11-tdep.c (m68hc11_get_register_info): Update. * machoread.c (macho_resolve_oso_sym_with_minsym): Update. * minsyms.c (lookup_minimal_symbol_internal): Rename to lookup_minimal_symbol. Change return type. (lookup_minimal_symbol): Remove. (lookup_bound_minimal_symbol): Update. (lookup_minimal_symbol_text): Change return type. (lookup_minimal_symbol_solib_trampoline): Change return type. * minsyms.h (lookup_minimal_symbol, lookup_minimal_symbol_text) (lookup_minimal_symbol_solib_trampoline): Change return type. * mips-linux-tdep.c (mips_linux_skip_resolver): Update. * objc-lang.c (lookup_objc_class, lookup_child_selector) (value_nsstring, find_imps): Update. * obsd-tdep.c (obsd_skip_solib_resolver): Update. * p-lang.c (pascal_main_name): Update. * ppc-linux-tdep.c (ppc_linux_spe_context_lookup): Update. * ppc-sysv-tdep.c (convert_code_addr_to_desc_addr): Update. * proc-service.c (ps_pglobal_lookup): Update. * ravenscar-thread.c (get_running_thread_msymbol): Change return type. (has_ravenscar_runtime, get_running_thread_id): Update. * remote.c (remote_check_symbols): Update. * sol-thread.c (ps_pglobal_lookup): Update. * sol2-tdep.c (sol2_skip_solib_resolver): Update. * solib-dsbt.c (lm_base): Update. * solib-frv.c (lm_base, frv_relocate_section_addresses): Update. * solib-irix.c (locate_base): Update. * solib-som.c (som_solib_create_inferior_hook) (som_solib_desire_dynamic_linker_symbols, link_map_start): Update. * solib-spu.c (spu_enable_break): Update. * solib-svr4.c (elf_locate_base, enable_break): Update. * spu-tdep.c (spu_get_overlay_table, spu_catch_start) (flush_ea_cache): Update. * stabsread.c (define_symbol): Update. * symfile.c (simple_read_overlay_table): Update. * symtab.c (find_pc_sect_line): Update. * tracepoint.c (scope_info): Update. * tui-disasm.c (tui_get_begin_asm_address): Update. * value.c (value_static_field): Update.
2013-10-15 03:53:29 +02:00
return (msym_ravenscar_runtime_initializer.minsym
&& (msym_known_tasks.minsym || msym_first_task.minsym)
&& msym_running_thread.minsym);
}
/* Return True if the Ada Ravenscar run-time can be found in the
application, and if it has been initialized on target. */
static int
ravenscar_runtime_initialized (void)
{
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
return (!(ptid_equal (ravenscar_active_task (1), null_ptid)));
}
/* Return the ID of the thread that is currently running.
Return 0 if the ID could not be determined. */
static CORE_ADDR
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
get_running_thread_id (int cpu)
{
use bound_minsym as result for lookup_minimal_symbol et al This patch changes a few minimal symbol lookup functions to return a bound_minimal_symbol rather than a pointer to the minsym. This change helps prepare gdb for computing a minimal symbol's address at the point of use. Note that this changes even those functions that ostensibly search a single objfile. That was necessary because, in fact, those functions can search an objfile and its separate debug objfiles; and it is important for the caller to know in which objfile the minimal symbol was actually found. The bulk of this patch is mechanical. 2014-02-26 Tom Tromey <tromey@redhat.com> * ada-lang.c (ada_update_initial_language): Update. (ada_main_name, ada_has_this_exception_support): Update. * ada-tasks.c (ada_tasks_inferior_data_sniffer): Update. * aix-thread.c (pdc_symbol_addrs, pd_enable): Update. * arm-tdep.c (arm_skip_stub): Update. * auxv.c (ld_so_xfer_auxv): Update. * avr-tdep.c (avr_scan_prologue): Update. * ax-gdb.c (gen_var_ref): Update. * breakpoint.c (struct breakpoint_objfile_data) <overlay_msym, longjmp_msym, terminate_msym, exception_msym>: Change type to bound_minimal_symbol. (create_overlay_event_breakpoint) (create_longjmp_master_breakpoint) (create_std_terminate_master_breakpoint) (create_exception_master_breakpoint): Update. * bsd-uthread.c (bsd_uthread_lookup_address): Update. * c-exp.y (classify_name): Update. * coffread.c (coff_symfile_read): Update. * common/agent.c (agent_look_up_symbols): Update. * d-lang.c (d_main_name): Update. * dbxread.c (find_stab_function_addr, end_psymtab): Update. * dec-thread.c (enable_dec_thread): Update. * dwarf2loc.c (call_site_to_target_addr): Update. * elfread.c (elf_gnu_ifunc_resolve_by_got): Update. * eval.c (evaluate_subexp_standard): Update. * findvar.c (struct minsym_lookup_data) <result>: Change type to bound_minimal_symbol. <objfile>: Remove. (minsym_lookup_iterator_cb, default_read_var_value): Update. * frame.c (inside_main_func): Update. * frv-tdep.c (frv_frame_this_id): Update. * gcore.c (call_target_sbrk): Update. * glibc-tdep.c (glibc_skip_solib_resolver): Update. * gnu-v3-abi.c (gnuv3_get_typeid, gnuv3_skip_trampoline): Update. * go-lang.c (go_main_name): Update. * hppa-hpux-tdep.c (hppa_hpux_skip_trampoline_code) (hppa_hpux_find_import_stub_for_addr): Update. * hppa-tdep.c (hppa_extract_17, hppa_lookup_stub_minimal_symbol): Update. Change return type. * hppa-tdep.h (hppa_lookup_stub_minimal_symbol): Change return type. * jit.c (jit_breakpoint_re_set_internal): Update. * linux-fork.c (inferior_call_waitpid, checkpoint_command): Update. * linux-nat.c (get_signo): Update. * linux-thread-db.c (inferior_has_bug): Update * m32c-tdep.c (m32c_return_value) (m32c_m16c_address_to_pointer): Update. * m32r-tdep.c (m32r_frame_this_id): Update. * m68hc11-tdep.c (m68hc11_get_register_info): Update. * machoread.c (macho_resolve_oso_sym_with_minsym): Update. * minsyms.c (lookup_minimal_symbol_internal): Rename to lookup_minimal_symbol. Change return type. (lookup_minimal_symbol): Remove. (lookup_bound_minimal_symbol): Update. (lookup_minimal_symbol_text): Change return type. (lookup_minimal_symbol_solib_trampoline): Change return type. * minsyms.h (lookup_minimal_symbol, lookup_minimal_symbol_text) (lookup_minimal_symbol_solib_trampoline): Change return type. * mips-linux-tdep.c (mips_linux_skip_resolver): Update. * objc-lang.c (lookup_objc_class, lookup_child_selector) (value_nsstring, find_imps): Update. * obsd-tdep.c (obsd_skip_solib_resolver): Update. * p-lang.c (pascal_main_name): Update. * ppc-linux-tdep.c (ppc_linux_spe_context_lookup): Update. * ppc-sysv-tdep.c (convert_code_addr_to_desc_addr): Update. * proc-service.c (ps_pglobal_lookup): Update. * ravenscar-thread.c (get_running_thread_msymbol): Change return type. (has_ravenscar_runtime, get_running_thread_id): Update. * remote.c (remote_check_symbols): Update. * sol-thread.c (ps_pglobal_lookup): Update. * sol2-tdep.c (sol2_skip_solib_resolver): Update. * solib-dsbt.c (lm_base): Update. * solib-frv.c (lm_base, frv_relocate_section_addresses): Update. * solib-irix.c (locate_base): Update. * solib-som.c (som_solib_create_inferior_hook) (som_solib_desire_dynamic_linker_symbols, link_map_start): Update. * solib-spu.c (spu_enable_break): Update. * solib-svr4.c (elf_locate_base, enable_break): Update. * spu-tdep.c (spu_get_overlay_table, spu_catch_start) (flush_ea_cache): Update. * stabsread.c (define_symbol): Update. * symfile.c (simple_read_overlay_table): Update. * symtab.c (find_pc_sect_line): Update. * tracepoint.c (scope_info): Update. * tui-disasm.c (tui_get_begin_asm_address): Update. * value.c (value_static_field): Update.
2013-10-15 03:53:29 +02:00
struct bound_minimal_symbol object_msym = get_running_thread_msymbol ();
int object_size;
int buf_size;
-Wpointer-sign: char -> gdb_byte. -Wpointer-sign catches all these cases across the codebase that should be using gdb_byte for raw target bytes. I think these are all obvious, hence I've collapsed into a single patch. gdb/ 2013-04-19 Pedro Alves <palves@redhat.com> * aarch64-tdep.c (aarch64_default_breakpoint): Change type to gdb_byte[]. (aarch64_breakpoint_from_pc): Change return type to gdb_byte *. * ada-lang.c (ada_value_assign): Use gdb_byte. * alphanbsd-tdep.c (sigtramp_retcode): Change type to gdb_byte[]. (alphanbsd_sigtramp_offset): Use gdb_byte. * arm-linux-tdep.c (arm_linux_arm_le_breakpoint) (arm_linux_arm_be_breakpoint, eabi_linux_arm_le_breakpoint) (eabi_linux_arm_be_breakpoint, arm_linux_thumb_be_breakpoint) (arm_linux_thumb_le_breakpoint, arm_linux_thumb2_be_breakpoint) (arm_linux_thumb2_le_breakpoint): Change type to gdb_byte[]. * arm-tdep.c (arm_stub_unwind_sniffer) (arm_displaced_init_closure): Use gdb_byte. (arm_default_arm_le_breakpoint, arm_default_arm_be_breakpoint) (arm_default_thumb_le_breakpoint) (arm_default_thumb_be_breakpoint): Change type to gdb_byte[]. * arm-tdep.h (struct gdbarch_tdep) <arm_breakpoint, thumb_breakpoint, thumb2_breakpoint>: Change type to gdb_byte *. * arm-wince-tdep.c (arm_wince_le_breakpoint) (arm_wince_thumb_le_breakpoint): Change type to gdb_byte[]. * armnbsd-tdep.c (arm_nbsd_arm_le_breakpoint) (arm_nbsd_arm_be_breakpoint, arm_nbsd_thumb_le_breakpoint) (arm_nbsd_thumb_be_breakpoint): Change type to gdb_byte[]. * armobsd-tdep.c (arm_obsd_thumb_le_breakpoint) (arm_obsd_thumb_be_breakpoint): Change type to gdb_byte[]. * cris-tdep.c (push_stack_item, cris_push_dummy_call) (cris_store_return_value, cris_extract_return_value): Use gdb_byte. (constraint): Change type of parameter to char * from signed char*. Use gdb_byte. * dwarf2loc.c (read_pieced_value, write_pieced_value): Change type of local buffer to gdb_byte *. * dwarf2read.c (read_index_from_section): Use gdb_byte. (create_dwp_hash_table): Change type of locals to gdb_byte *. (add_address_entry): Change type of local buffer to gdb_byte[]. * frv-tdep.c (frv_adjust_breakpoint_address, find_func_descr) (frv_push_dummy_call): Use gdb_byte. * hppa-hpux-tdep.c (hppa_hpux_push_dummy_code) (hppa_hpux_supply_ss_fpblock, hppa_hpux_supply_ss_wide) (hppa_hpux_supply_save_state): Use gdb_byte. * hppa-tdep.c (hppa32_push_dummy_call) (hppa64_convert_code_addr_to_fptr): Use gdb_byte. * ia64-tdep.c (extract_bit_field, replace_bit_field) (slotN_contents, replace_slotN_contents): Change type of parameter to gdb_byte *. (fetch_instruction, ia64_pseudo_register_write) (ia64_register_to_value, ia64_value_to_register) (ia64_extract_return_value, ia64_store_return_value) (ia64_push_dummy_call): Use gdb_byte. * m32c-tdep.c (m32c_return_value): Remove cast. * m68hc11-tdep.c (m68hc11_pseudo_register_write) (m68hc11_push_dummy_call, m68hc11_store_return_value): Use gdb_byte. * mipsnbsd-tdep.c (mipsnbsd_get_longjmp_target): Use gdb_byte. * mn10300-tdep.c (mn10300_store_return_value) (mn10300_breakpoint_from_pc, mn10300_push_dummy_call): Use gdb_byte. * moxie-tdep.c (moxie_process_readu): Use gdb_byte. (moxie_process_record): Remove casts. * ppc-ravenscar-thread.c (supply_register_at_address) (ppc_ravenscar_generic_store_registers): Use gdb_byte. * ravenscar-thread.c (get_running_thread_id): Use gdb_byte. * remote-m32r-sdi.c (m32r_fetch_register): Use gdb_byte. * remote-mips.c (mips_xfer_memory): Use gdb_byte. * remote.c (compare_sections_command): Use gdb_byte. * score-tdep.c (score7_free_memblock): Change type of parameter to gdb_byte *. * sh-tdep.c (sh_justify_value_in_reg): Change return type to gdb_byte *. Use gdb_byte. (sh_push_dummy_call_fpu): Use gdb_byte. (sh_extract_return_value_nofpu, sh_extract_return_value_fpu) (sh_store_return_value_nofpu, sh_store_return_value_fpu) (sh_register_convert_to_virtual, sh_register_convert_to_raw): Change parameter type to 'gdb_byte *'. Use gdb_byte. (sh_pseudo_register_read, sh_pseudo_register_write): Use gdb_byte. * sh64-tdep.c (sh64_push_dummy_call): Use gdb_byte. (sh64_store_return_value, sh64_register_convert_to_virtual): Change parameter type to 'gdb_byte *'. Use gdb_byte. (sh64_pseudo_register_write): Use gdb_byte. * solib-darwin.c (darwin_current_sos): Add casts to 'gdb_byte *'. * solib-irix.c (fetch_lm_info): Likewise. Use gdb_byte for byte buffer. (irix_current_sos): Use gdb_byte. * solib-som.c (som_current_sos): Use gdb_byte. * sparc-ravenscar-thread.c (supply_register_at_address) (sparc_ravenscar_generic_store_registers): Use gdb_byte. * spu-multiarch.c (spu_xfer_partial): Add cast to 'char *'. * spu-tdep.c (spu_get_overlay_table): Use gdb_byte. * tic6x-tdep.c (tic6x_breakpoint_from_pc): Change return type to 'gdb_byte *'. * tic6x-tdep.h (struct gdbarch_tdep) <breakpoint>: Change type to 'gdb_byte *'. * tracepoint.c (tfile_fetch_registers): Use gdb_byte. * xstormy16-tdep.c (xstormy16_extract_return_value) (xstormy16_store_return_value): Change parameter type to 'gdb_byte *'. Adjust. (xstormy16_push_dummy_call): Use gdb_byte. * xtensa-tdep.c (xtensa_scan_prologue, call0_ret) (call0_analyze_prologue, execute_code): Use gdb_byte.
2013-04-19 17:09:46 +02:00
gdb_byte *buf;
CORE_ADDR object_addr;
struct type *builtin_type_void_data_ptr =
builtin_type (target_gdbarch ())->builtin_data_ptr;
use bound_minsym as result for lookup_minimal_symbol et al This patch changes a few minimal symbol lookup functions to return a bound_minimal_symbol rather than a pointer to the minsym. This change helps prepare gdb for computing a minimal symbol's address at the point of use. Note that this changes even those functions that ostensibly search a single objfile. That was necessary because, in fact, those functions can search an objfile and its separate debug objfiles; and it is important for the caller to know in which objfile the minimal symbol was actually found. The bulk of this patch is mechanical. 2014-02-26 Tom Tromey <tromey@redhat.com> * ada-lang.c (ada_update_initial_language): Update. (ada_main_name, ada_has_this_exception_support): Update. * ada-tasks.c (ada_tasks_inferior_data_sniffer): Update. * aix-thread.c (pdc_symbol_addrs, pd_enable): Update. * arm-tdep.c (arm_skip_stub): Update. * auxv.c (ld_so_xfer_auxv): Update. * avr-tdep.c (avr_scan_prologue): Update. * ax-gdb.c (gen_var_ref): Update. * breakpoint.c (struct breakpoint_objfile_data) <overlay_msym, longjmp_msym, terminate_msym, exception_msym>: Change type to bound_minimal_symbol. (create_overlay_event_breakpoint) (create_longjmp_master_breakpoint) (create_std_terminate_master_breakpoint) (create_exception_master_breakpoint): Update. * bsd-uthread.c (bsd_uthread_lookup_address): Update. * c-exp.y (classify_name): Update. * coffread.c (coff_symfile_read): Update. * common/agent.c (agent_look_up_symbols): Update. * d-lang.c (d_main_name): Update. * dbxread.c (find_stab_function_addr, end_psymtab): Update. * dec-thread.c (enable_dec_thread): Update. * dwarf2loc.c (call_site_to_target_addr): Update. * elfread.c (elf_gnu_ifunc_resolve_by_got): Update. * eval.c (evaluate_subexp_standard): Update. * findvar.c (struct minsym_lookup_data) <result>: Change type to bound_minimal_symbol. <objfile>: Remove. (minsym_lookup_iterator_cb, default_read_var_value): Update. * frame.c (inside_main_func): Update. * frv-tdep.c (frv_frame_this_id): Update. * gcore.c (call_target_sbrk): Update. * glibc-tdep.c (glibc_skip_solib_resolver): Update. * gnu-v3-abi.c (gnuv3_get_typeid, gnuv3_skip_trampoline): Update. * go-lang.c (go_main_name): Update. * hppa-hpux-tdep.c (hppa_hpux_skip_trampoline_code) (hppa_hpux_find_import_stub_for_addr): Update. * hppa-tdep.c (hppa_extract_17, hppa_lookup_stub_minimal_symbol): Update. Change return type. * hppa-tdep.h (hppa_lookup_stub_minimal_symbol): Change return type. * jit.c (jit_breakpoint_re_set_internal): Update. * linux-fork.c (inferior_call_waitpid, checkpoint_command): Update. * linux-nat.c (get_signo): Update. * linux-thread-db.c (inferior_has_bug): Update * m32c-tdep.c (m32c_return_value) (m32c_m16c_address_to_pointer): Update. * m32r-tdep.c (m32r_frame_this_id): Update. * m68hc11-tdep.c (m68hc11_get_register_info): Update. * machoread.c (macho_resolve_oso_sym_with_minsym): Update. * minsyms.c (lookup_minimal_symbol_internal): Rename to lookup_minimal_symbol. Change return type. (lookup_minimal_symbol): Remove. (lookup_bound_minimal_symbol): Update. (lookup_minimal_symbol_text): Change return type. (lookup_minimal_symbol_solib_trampoline): Change return type. * minsyms.h (lookup_minimal_symbol, lookup_minimal_symbol_text) (lookup_minimal_symbol_solib_trampoline): Change return type. * mips-linux-tdep.c (mips_linux_skip_resolver): Update. * objc-lang.c (lookup_objc_class, lookup_child_selector) (value_nsstring, find_imps): Update. * obsd-tdep.c (obsd_skip_solib_resolver): Update. * p-lang.c (pascal_main_name): Update. * ppc-linux-tdep.c (ppc_linux_spe_context_lookup): Update. * ppc-sysv-tdep.c (convert_code_addr_to_desc_addr): Update. * proc-service.c (ps_pglobal_lookup): Update. * ravenscar-thread.c (get_running_thread_msymbol): Change return type. (has_ravenscar_runtime, get_running_thread_id): Update. * remote.c (remote_check_symbols): Update. * sol-thread.c (ps_pglobal_lookup): Update. * sol2-tdep.c (sol2_skip_solib_resolver): Update. * solib-dsbt.c (lm_base): Update. * solib-frv.c (lm_base, frv_relocate_section_addresses): Update. * solib-irix.c (locate_base): Update. * solib-som.c (som_solib_create_inferior_hook) (som_solib_desire_dynamic_linker_symbols, link_map_start): Update. * solib-spu.c (spu_enable_break): Update. * solib-svr4.c (elf_locate_base, enable_break): Update. * spu-tdep.c (spu_get_overlay_table, spu_catch_start) (flush_ea_cache): Update. * stabsread.c (define_symbol): Update. * symfile.c (simple_read_overlay_table): Update. * symtab.c (find_pc_sect_line): Update. * tracepoint.c (scope_info): Update. * tui-disasm.c (tui_get_begin_asm_address): Update. * value.c (value_static_field): Update.
2013-10-15 03:53:29 +02:00
if (!object_msym.minsym)
return 0;
object_size = TYPE_LENGTH (builtin_type_void_data_ptr);
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
object_addr = (BMSYMBOL_VALUE_ADDRESS (object_msym)
+ (cpu - 1) * object_size);
buf_size = object_size;
Add casts to memory allocation related calls Most allocation functions (if not all) return a void* pointing to the allocated memory. In C++, we need to add an explicit cast when assigning the result to a pointer to another type (which is the case more often than not). The content of this patch is taken from Pedro's branch, from commit "(mostly) auto-generated patch to insert casts needed for C++". I validated that the changes make sense and manually reflowed the code to make it respect the coding style. I also found multiple places where I could use XNEW/XNEWVEC/XRESIZEVEC/etc. Thanks a lot to whoever did that automated script to insert casts, doing it completely by hand would have taken a ridiculous amount of time. Only files built on x86 with --enable-targets=all are modified. This means that all other -nat.c files are untouched and will have to be dealt with later by using appropiate compilers. Or maybe we can try to build them with a regular g++ just to know where to add casts, I don't know. I built-tested this with --enable-targets=all and reg-tested. Here's the changelog entry, which was not too bad to make despite the size, thanks to David Malcom's script. I fixed some bits by hand, but there might be some wrong parts left (hopefully not). gdb/ChangeLog: * aarch64-linux-tdep.c (aarch64_stap_parse_special_token): Add cast to allocation result assignment. * ada-exp.y (write_object_renaming): Likewise. (write_ambiguous_var): Likewise. (ada_nget_field_index): Likewise. (write_var_or_type): Likewise. * ada-lang.c (ada_decode_symbol): Likewise. (ada_value_assign): Likewise. (value_pointer): Likewise. (cache_symbol): Likewise. (add_nonlocal_symbols): Likewise. (ada_name_for_lookup): Likewise. (symbol_completion_add): Likewise. (ada_to_fixed_type_1): Likewise. (ada_get_next_arg): Likewise. (defns_collected): Likewise. * ada-lex.l (processId): Likewise. (processString): Likewise. * ada-tasks.c (read_known_tasks_array): Likewise. (read_known_tasks_list): Likewise. * ada-typeprint.c (decoded_type_name): Likewise. * addrmap.c (addrmap_mutable_create_fixed): Likewise. * amd64-tdep.c (amd64_push_arguments): Likewise. (amd64_displaced_step_copy_insn): Likewise. (amd64_classify_insn_at): Likewise. (amd64_relocate_instruction): Likewise. * amd64obsd-tdep.c (amd64obsd_sigtramp_p): Likewise. * arch-utils.c (simple_displaced_step_copy_insn): Likewise. (initialize_current_architecture): Likewise. * arm-linux-tdep.c (arm_stap_parse_special_token): Likewise. * arm-symbian-tdep.c (arm_symbian_osabi_sniffer): Likewise. * arm-tdep.c (arm_exidx_new_objfile): Likewise. (arm_push_dummy_call): Likewise. (extend_buffer_earlier): Likewise. (arm_adjust_breakpoint_address): Likewise. (arm_skip_stub): Likewise. * auto-load.c (filename_is_in_pattern): Likewise. (maybe_add_script_file): Likewise. (maybe_add_script_text): Likewise. (auto_load_objfile_script_1): Likewise. * auxv.c (ld_so_xfer_auxv): Likewise. * ax-general.c (new_agent_expr): Likewise. (grow_expr): Likewise. (ax_reg_mask): Likewise. * bcache.c (bcache_full): Likewise. * breakpoint.c (program_breakpoint_here_p): Likewise. * btrace.c (parse_xml_raw): Likewise. * build-id.c (build_id_to_debug_bfd): Likewise. * buildsym.c (end_symtab_with_blockvector): Likewise. * c-exp.y (string_exp): Likewise. (qualified_name): Likewise. (write_destructor_name): Likewise. (operator_stoken): Likewise. (parse_number): Likewise. (scan_macro_expansion): Likewise. (yylex): Likewise. (c_print_token): Likewise. * c-lang.c (c_get_string): Likewise. (emit_numeric_character): Likewise. * charset.c (wchar_iterate): Likewise. * cli/cli-cmds.c (complete_command): Likewise. (make_command): Likewise. * cli/cli-dump.c (restore_section_callback): Likewise. (restore_binary_file): Likewise. * cli/cli-interp.c (cli_interpreter_exec): Likewise. * cli/cli-script.c (execute_control_command): Likewise. * cli/cli-setshow.c (do_set_command): Likewise. * coff-pe-read.c (add_pe_forwarded_sym): Likewise. (read_pe_exported_syms): Likewise. * coffread.c (coff_read_struct_type): Likewise. (coff_read_enum_type): Likewise. * common/btrace-common.c (btrace_data_append): Likewise. * common/buffer.c (buffer_grow): Likewise. * common/filestuff.c (gdb_fopen_cloexec): Likewise. * common/format.c (parse_format_string): Likewise. * common/gdb_vecs.c (delim_string_to_char_ptr_vec_append): Likewise. * common/xml-utils.c (xml_escape_text): Likewise. * compile/compile-object-load.c (copy_sections): Likewise. (compile_object_load): Likewise. * compile/compile-object-run.c (compile_object_run): Likewise. * completer.c (filename_completer): Likewise. * corefile.c (read_memory_typed_address): Likewise. (write_memory_unsigned_integer): Likewise. (write_memory_signed_integer): Likewise. (complete_set_gnutarget): Likewise. * corelow.c (get_core_register_section): Likewise. * cp-name-parser.y (d_grab): Likewise. (allocate_info): Likewise. (cp_new_demangle_parse_info): Likewise. * cp-namespace.c (cp_scan_for_anonymous_namespaces): Likewise. (cp_lookup_symbol_in_namespace): Likewise. (lookup_namespace_scope): Likewise. (find_symbol_in_baseclass): Likewise. (cp_lookup_nested_symbol): Likewise. (cp_lookup_transparent_type_loop): Likewise. * cp-support.c (copy_string_to_obstack): Likewise. (make_symbol_overload_list): Likewise. (make_symbol_overload_list_namespace): Likewise. (make_symbol_overload_list_adl_namespace): Likewise. (first_component_command): Likewise. * cp-valprint.c (cp_print_value): Likewise. * ctf.c (ctf_xfer_partial): Likewise. * d-exp.y (StringExp): Likewise. * d-namespace.c (d_lookup_symbol_in_module): Likewise. (lookup_module_scope): Likewise. (find_symbol_in_baseclass): Likewise. (d_lookup_nested_symbol): Likewise. * dbxread.c (find_stab_function_addr): Likewise. (read_dbx_symtab): Likewise. (dbx_end_psymtab): Likewise. (cp_set_block_scope): Likewise. * dcache.c (dcache_alloc): Likewise. * demangle.c (_initialize_demangler): Likewise. * dicos-tdep.c (dicos_load_module_p): Likewise. * dictionary.c (dict_create_hashed_expandable): Likewise. (dict_create_linear_expandable): Likewise. (expand_hashtable): Likewise. (add_symbol_linear_expandable): Likewise. * dwarf2-frame.c (add_cie): Likewise. (add_fde): Likewise. (dwarf2_build_frame_info): Likewise. * dwarf2expr.c (dwarf_expr_grow_stack): Likewise. (dwarf_expr_fetch_address): Likewise. (add_piece): Likewise. (execute_stack_op): Likewise. * dwarf2loc.c (chain_candidate): Likewise. (dwarf_entry_parameter_to_value): Likewise. (read_pieced_value): Likewise. (write_pieced_value): Likewise. * dwarf2read.c (dwarf2_read_section): Likewise. (add_type_unit): Likewise. (read_comp_units_from_section): Likewise. (fixup_go_packaging): Likewise. (dwarf2_compute_name): Likewise. (dwarf2_physname): Likewise. (create_dwo_unit_in_dwp_v1): Likewise. (create_dwo_unit_in_dwp_v2): Likewise. (read_func_scope): Likewise. (read_call_site_scope): Likewise. (dwarf2_attach_fields_to_type): Likewise. (process_structure_scope): Likewise. (mark_common_block_symbol_computed): Likewise. (read_common_block): Likewise. (abbrev_table_read_table): Likewise. (guess_partial_die_structure_name): Likewise. (fixup_partial_die): Likewise. (add_file_name): Likewise. (dwarf2_const_value_data): Likewise. (dwarf2_const_value_attr): Likewise. (build_error_marker_type): Likewise. (guess_full_die_structure_name): Likewise. (anonymous_struct_prefix): Likewise. (typename_concat): Likewise. (dwarf2_canonicalize_name): Likewise. (dwarf2_name): Likewise. (write_constant_as_bytes): Likewise. (dwarf2_fetch_constant_bytes): Likewise. (copy_string): Likewise. (parse_macro_definition): Likewise. * elfread.c (elf_symfile_segments): Likewise. (elf_rel_plt_read): Likewise. (elf_gnu_ifunc_resolve_by_cache): Likewise. (elf_gnu_ifunc_resolve_by_got): Likewise. (elf_read_minimal_symbols): Likewise. (elf_gnu_ifunc_record_cache): Likewise. * event-top.c (top_level_prompt): Likewise. (command_line_handler): Likewise. * exec.c (resize_section_table): Likewise. * expprint.c (print_subexp_standard): Likewise. * fbsd-tdep.c (fbsd_collect_regset_section_cb): Likewise. * findcmd.c (parse_find_args): Likewise. * findvar.c (address_from_register): Likewise. * frame.c (get_prev_frame_always): Likewise. * gdb_bfd.c (gdb_bfd_ref): Likewise. (get_section_descriptor): Likewise. * gdb_obstack.c (obconcat): Likewise. (obstack_strdup): Likewise. * gdbtypes.c (lookup_function_type_with_arguments): Likewise. (create_set_type): Likewise. (lookup_unsigned_typename): Likewise. (lookup_signed_typename): Likewise. (resolve_dynamic_union): Likewise. (resolve_dynamic_struct): Likewise. (add_dyn_prop): Likewise. (copy_dynamic_prop_list): Likewise. (arch_flags_type): Likewise. (append_composite_type_field_raw): Likewise. * gdbtypes.h (INIT_FUNC_SPECIFIC): Likewise. * gnu-v3-abi.c (gnuv3_rtti_type): Likewise. * go-exp.y (string_exp): Likewise. * go-lang.c (go_demangle): Likewise. * guile/guile.c (compute_scheme_string): Likewise. * guile/scm-cmd.c (gdbscm_parse_command_name): Likewise. (gdbscm_canonicalize_command_name): Likewise. * guile/scm-ports.c (ioscm_init_stdio_buffers): Likewise. (ioscm_init_memory_port): Likewise. (ioscm_reinit_memory_port): Likewise. * guile/scm-utils.c (gdbscm_gc_xstrdup): Likewise. (gdbscm_gc_dup_argv): Likewise. * h8300-tdep.c (h8300_push_dummy_call): Likewise. * hppa-tdep.c (internalize_unwinds): Likewise. (read_unwind_info): Likewise. * i386-cygwin-tdep.c (core_process_module_section): Likewise. (windows_core_xfer_shared_libraries): Likewise. * i386-tdep.c (i386_displaced_step_copy_insn): Likewise. (i386_stap_parse_special_token_triplet): Likewise. (i386_stap_parse_special_token_three_arg_disp): Likewise. * i386obsd-tdep.c (i386obsd_sigtramp_p): Likewise. * inf-child.c (inf_child_fileio_readlink): Likewise. * inf-ptrace.c (inf_ptrace_fetch_register): Likewise. (inf_ptrace_store_register): Likewise. * infrun.c (follow_exec): Likewise. (displaced_step_prepare_throw): Likewise. (save_stop_context): Likewise. (save_infcall_suspend_state): Likewise. * jit.c (jit_read_descriptor): Likewise. (jit_read_code_entry): Likewise. (jit_symtab_line_mapping_add_impl): Likewise. (finalize_symtab): Likewise. (jit_unwind_reg_get_impl): Likewise. * jv-exp.y (QualifiedName): Likewise. * jv-lang.c (get_java_utf8_name): Likewise. (type_from_class): Likewise. (java_demangle_type_signature): Likewise. (java_class_name_from_physname): Likewise. * jv-typeprint.c (java_type_print_base): Likewise. * jv-valprint.c (java_value_print): Likewise. * language.c (add_language): Likewise. * linespec.c (add_sal_to_sals_basic): Likewise. (add_sal_to_sals): Likewise. (decode_objc): Likewise. (find_linespec_symbols): Likewise. * linux-fork.c (fork_save_infrun_state): Likewise. * linux-nat.c (linux_nat_detach): Likewise. (linux_nat_fileio_readlink): Likewise. * linux-record.c (record_linux_sockaddr): Likewise. (record_linux_msghdr): Likewise. (Do): Likewise. * linux-tdep.c (linux_core_info_proc_mappings): Likewise. (linux_collect_regset_section_cb): Likewise. (linux_get_siginfo_data): Likewise. * linux-thread-db.c (try_thread_db_load_from_pdir_1): Likewise. (try_thread_db_load_from_dir): Likewise. (thread_db_load_search): Likewise. (info_auto_load_libthread_db): Likewise. * m32c-tdep.c (m32c_m16c_address_to_pointer): Likewise. (m32c_m16c_pointer_to_address): Likewise. * m68hc11-tdep.c (m68hc11_pseudo_register_write): Likewise. * m68k-tdep.c (m68k_get_longjmp_target): Likewise. * machoread.c (macho_check_dsym): Likewise. * macroexp.c (resize_buffer): Likewise. (gather_arguments): Likewise. (maybe_expand): Likewise. * macrotab.c (new_macro_key): Likewise. (new_source_file): Likewise. (new_macro_definition): Likewise. * mdebugread.c (parse_symbol): Likewise. (parse_type): Likewise. (parse_partial_symbols): Likewise. (psymtab_to_symtab_1): Likewise. * mem-break.c (default_memory_insert_breakpoint): Likewise. * mi/mi-cmd-break.c (mi_argv_to_format): Likewise. * mi/mi-main.c (mi_cmd_data_read_memory): Likewise. (mi_cmd_data_read_memory_bytes): Likewise. (mi_cmd_data_write_memory_bytes): Likewise. (mi_cmd_trace_frame_collected): Likewise. * mi/mi-parse.c (mi_parse_argv): Likewise. (mi_parse): Likewise. * minidebug.c (lzma_open): Likewise. (lzma_pread): Likewise. * mips-tdep.c (mips_read_fp_register_single): Likewise. (mips_print_fp_register): Likewise. * mipsnbsd-tdep.c (mipsnbsd_get_longjmp_target): Likewise. * mipsread.c (read_alphacoff_dynamic_symtab): Likewise. * mt-tdep.c (mt_register_name): Likewise. (mt_registers_info): Likewise. (mt_push_dummy_call): Likewise. * namespace.c (add_using_directive): Likewise. * nat/linux-btrace.c (perf_event_read): Likewise. (linux_enable_bts): Likewise. * nat/linux-osdata.c (linux_common_core_of_thread): Likewise. * nat/linux-ptrace.c (linux_ptrace_test_ret_to_nx): Likewise. * nto-tdep.c (nto_find_and_open_solib): Likewise. (nto_parse_redirection): Likewise. * objc-lang.c (objc_demangle): Likewise. (find_methods): Likewise. * objfiles.c (get_objfile_bfd_data): Likewise. (set_objfile_main_name): Likewise. (allocate_objfile): Likewise. (objfile_relocate): Likewise. (update_section_map): Likewise. * osabi.c (generic_elf_osabi_sniff_abi_tag_sections): Likewise. * p-exp.y (exp): Likewise. (yylex): Likewise. * p-valprint.c (pascal_object_print_value): Likewise. * parse.c (initialize_expout): Likewise. (mark_completion_tag): Likewise. (copy_name): Likewise. (parse_float): Likewise. (type_stack_reserve): Likewise. * ppc-linux-tdep.c (ppc_stap_parse_special_token): Likewise. (ppu2spu_prev_register): Likewise. * ppc-ravenscar-thread.c (supply_register_at_address): Likewise. * printcmd.c (printf_wide_c_string): Likewise. (printf_pointer): Likewise. * probe.c (parse_probes): Likewise. * python/py-cmd.c (gdbpy_parse_command_name): Likewise. (cmdpy_init): Likewise. * python/py-gdb-readline.c (gdbpy_readline_wrapper): Likewise. * python/py-symtab.c (set_sal): Likewise. * python/py-unwind.c (pyuw_sniffer): Likewise. * python/python.c (python_interactive_command): Likewise. (compute_python_string): Likewise. * ravenscar-thread.c (get_running_thread_id): Likewise. * record-full.c (record_full_exec_insn): Likewise. (record_full_core_open_1): Likewise. * regcache.c (regcache_raw_read_signed): Likewise. (regcache_raw_read_unsigned): Likewise. (regcache_cooked_read_signed): Likewise. (regcache_cooked_read_unsigned): Likewise. * remote-fileio.c (remote_fileio_func_open): Likewise. (remote_fileio_func_rename): Likewise. (remote_fileio_func_unlink): Likewise. (remote_fileio_func_stat): Likewise. (remote_fileio_func_system): Likewise. * remote-mips.c (mips_xfer_memory): Likewise. (mips_load_srec): Likewise. (pmon_end_download): Likewise. * remote.c (new_remote_state): Likewise. (map_regcache_remote_table): Likewise. (remote_register_number_and_offset): Likewise. (init_remote_state): Likewise. (get_memory_packet_size): Likewise. (remote_pass_signals): Likewise. (remote_program_signals): Likewise. (remote_start_remote): Likewise. (remote_check_symbols): Likewise. (remote_query_supported): Likewise. (extended_remote_attach): Likewise. (process_g_packet): Likewise. (store_registers_using_G): Likewise. (putpkt_binary): Likewise. (read_frame): Likewise. (compare_sections_command): Likewise. (remote_hostio_pread): Likewise. (remote_hostio_readlink): Likewise. (remote_file_put): Likewise. (remote_file_get): Likewise. (remote_pid_to_exec_file): Likewise. (_initialize_remote): Likewise. * rs6000-aix-tdep.c (rs6000_aix_ld_info_to_xml): Likewise. (rs6000_aix_core_xfer_shared_libraries_aix): Likewise. * rs6000-tdep.c (ppc_displaced_step_copy_insn): Likewise. (bfd_uses_spe_extensions): Likewise. * s390-linux-tdep.c (s390_displaced_step_copy_insn): Likewise. * score-tdep.c (score7_malloc_and_get_memblock): Likewise. * solib-dsbt.c (decode_loadmap): Likewise. (fetch_loadmap): Likewise. (scan_dyntag): Likewise. (enable_break): Likewise. (dsbt_relocate_main_executable): Likewise. * solib-frv.c (fetch_loadmap): Likewise. (enable_break2): Likewise. (frv_relocate_main_executable): Likewise. * solib-spu.c (spu_relocate_main_executable): Likewise. (spu_bfd_open): Likewise. * solib-svr4.c (lm_info_read): Likewise. (read_program_header): Likewise. (find_program_interpreter): Likewise. (scan_dyntag): Likewise. (elf_locate_base): Likewise. (open_symbol_file_object): Likewise. (read_program_headers_from_bfd): Likewise. (svr4_relocate_main_executable): Likewise. * solib-target.c (solib_target_relocate_section_addresses): Likewise. * solib.c (solib_find_1): Likewise. (exec_file_find): Likewise. (solib_find): Likewise. * source.c (openp): Likewise. (print_source_lines_base): Likewise. (forward_search_command): Likewise. * sparc-ravenscar-thread.c (supply_register_at_address): Likewise. * spu-tdep.c (spu2ppu_prev_register): Likewise. (spu_get_overlay_table): Likewise. * stabsread.c (patch_block_stabs): Likewise. (define_symbol): Likewise. (again:): Likewise. (read_member_functions): Likewise. (read_one_struct_field): Likewise. (read_enum_type): Likewise. (common_block_start): Likewise. * stack.c (read_frame_arg): Likewise. (backtrace_command): Likewise. * stap-probe.c (stap_parse_register_operand): Likewise. * symfile.c (syms_from_objfile_1): Likewise. (find_separate_debug_file): Likewise. (load_command): Likewise. (load_progress): Likewise. (load_section_callback): Likewise. (reread_symbols): Likewise. (add_filename_language): Likewise. (allocate_compunit_symtab): Likewise. (read_target_long_array): Likewise. (simple_read_overlay_table): Likewise. * symtab.c (symbol_set_names): Likewise. (resize_symbol_cache): Likewise. (rbreak_command): Likewise. (completion_list_add_name): Likewise. (completion_list_objc_symbol): Likewise. (add_filename_to_list): Likewise. * target-descriptions.c (maint_print_c_tdesc_cmd): Likewise. * target-memory.c (target_write_memory_blocks): Likewise. * target.c (target_read_string): Likewise. (read_whatever_is_readable): Likewise. (target_read_alloc_1): Likewise. (simple_search_memory): Likewise. (target_fileio_read_alloc_1): Likewise. * tilegx-tdep.c (tilegx_push_dummy_call): Likewise. * top.c (command_line_input): Likewise. * tracefile-tfile.c (tfile_fetch_registers): Likewise. * tracefile.c (tracefile_fetch_registers): Likewise. * tracepoint.c (add_memrange): Likewise. (init_collection_list): Likewise. (add_aexpr): Likewise. (trace_dump_actions): Likewise. (parse_trace_status): Likewise. (parse_tracepoint_definition): Likewise. (parse_tsv_definition): Likewise. (parse_static_tracepoint_marker_definition): Likewise. * tui/tui-file.c (tui_sfileopen): Likewise. (tui_file_adjust_strbuf): Likewise. * tui/tui-io.c (tui_expand_tabs): Likewise. * tui/tui-source.c (tui_set_source_content): Likewise. * typeprint.c (find_global_typedef): Likewise. * ui-file.c (do_ui_file_xstrdup): Likewise. (ui_file_obsavestring): Likewise. (mem_file_write): Likewise. * utils.c (make_hex_string): Likewise. (get_regcomp_error): Likewise. (puts_filtered_tabular): Likewise. (gdb_realpath_keepfile): Likewise. (ldirname): Likewise. (gdb_bfd_errmsg): Likewise. (substitute_path_component): Likewise. * valops.c (search_struct_method): Likewise. (find_oload_champ_namespace_loop): Likewise. * valprint.c (print_decimal_chars): Likewise. (read_string): Likewise. (generic_emit_char): Likewise. * varobj.c (varobj_delete): Likewise. (varobj_value_get_print_value): Likewise. * vaxobsd-tdep.c (vaxobsd_sigtramp_sniffer): Likewise. * windows-tdep.c (display_one_tib): Likewise. * xcoffread.c (read_xcoff_symtab): Likewise. (process_xcoff_symbol): Likewise. (swap_sym): Likewise. (scan_xcoff_symtab): Likewise. (xcoff_initial_scan): Likewise. * xml-support.c (gdb_xml_end_element): Likewise. (xml_process_xincludes): Likewise. (xml_fetch_content_from_file): Likewise. * xml-syscall.c (xml_list_of_syscalls): Likewise. * xstormy16-tdep.c (xstormy16_push_dummy_call): Likewise. gdb/gdbserver/ChangeLog: * ax.c (gdb_parse_agent_expr): Add cast to allocation result assignment. (gdb_unparse_agent_expr): Likewise. * hostio.c (require_data): Likewise. (handle_pread): Likewise. * linux-low.c (disable_regset): Likewise. (fetch_register): Likewise. (store_register): Likewise. (get_dynamic): Likewise. (linux_qxfer_libraries_svr4): Likewise. * mem-break.c (delete_fast_tracepoint_jump): Likewise. (set_fast_tracepoint_jump): Likewise. (uninsert_fast_tracepoint_jumps_at): Likewise. (reinsert_fast_tracepoint_jumps_at): Likewise. (validate_inserted_breakpoint): Likewise. (clone_agent_expr): Likewise. * regcache.c (init_register_cache): Likewise. * remote-utils.c (putpkt_binary_1): Likewise. (decode_M_packet): Likewise. (decode_X_packet): Likewise. (look_up_one_symbol): Likewise. (relocate_instruction): Likewise. (monitor_output): Likewise. * server.c (handle_search_memory): Likewise. (handle_qxfer_exec_file): Likewise. (handle_qxfer_libraries): Likewise. (handle_qxfer): Likewise. (handle_query): Likewise. (handle_v_cont): Likewise. (handle_v_run): Likewise. (captured_main): Likewise. * target.c (write_inferior_memory): Likewise. * thread-db.c (try_thread_db_load_from_dir): Likewise. * tracepoint.c (init_trace_buffer): Likewise. (add_tracepoint_action): Likewise. (add_traceframe): Likewise. (add_traceframe_block): Likewise. (cmd_qtdpsrc): Likewise. (cmd_qtdv): Likewise. (cmd_qtstatus): Likewise. (response_source): Likewise. (response_tsv): Likewise. (cmd_qtnotes): Likewise. (gdb_collect): Likewise. (initialize_tracepoint): Likewise.
2015-09-25 20:08:06 +02:00
buf = (gdb_byte *) alloca (buf_size);
read_memory (object_addr, buf, buf_size);
return extract_typed_address (buf, builtin_type_void_data_ptr);
}
static void
ravenscar_resume (struct target_ops *ops, ptid_t ptid, int step,
enum gdb_signal siggnal)
{
struct target_ops *beneath = find_target_beneath (ops);
inferior_ptid = base_ptid;
beneath->to_resume (beneath, base_ptid, step, siggnal);
}
static ptid_t
ravenscar_wait (struct target_ops *ops, ptid_t ptid,
struct target_waitstatus *status,
int options)
{
struct target_ops *beneath = find_target_beneath (ops);
ptid_t event_ptid;
inferior_ptid = base_ptid;
event_ptid = beneath->to_wait (beneath, base_ptid, status, 0);
/* Find any new threads that might have been created, and update
inferior_ptid to the active thread.
Only do it if the program is still alive, though. Otherwise,
this causes problems when debugging through the remote protocol,
because we might try switching threads (and thus sending packets)
after the remote has disconnected. */
if (status->kind != TARGET_WAITKIND_EXITED
&& status->kind != TARGET_WAITKIND_SIGNALLED)
{
inferior_ptid = event_ptid;
Push pruning old threads down to the target When GDB wants to sync the thread list with the target's (e.g., due to "info threads"), it calls update_thread_list: update_thread_list (void) { prune_threads (); target_find_new_threads (); update_threads_executing (); } And then prune_threads does: prune_threads (void) { struct thread_info *tp, *next; for (tp = thread_list; tp; tp = next) { next = tp->next; if (!thread_alive (tp)) delete_thread (tp->ptid); } } Calling thread_live on each thread one by one is expensive. E.g., on Linux, it ends up doing kill(SIG0) once for each thread. Not a big deal, but still a bunch of syscalls... With the remote target, it's cumbersome. That thread_alive call ends up generating one T packet per thread: Sending packet: $Tp2141.2150#82...Packet received: OK Sending packet: $Tp2141.214f#b7...Packet received: OK Sending packet: $Tp2141.2141#82...Packet received: OK Sending packet: $qXfer:threads:read::0,fff#03...Packet received: l<threads>\n<thread id="p2141.2141" core="2"/>\n<thread id="p2141.214f" core="1"/>\n<thread id="p2141.2150" core="2"/>\n</threads>\n That seems a bit silly when target_find_new_threads method implementations will always fetch the whole current set of target threads, and then add those that are not in GDB's thread list, to GDB's thread list. This patch thus pushes down the responsibility of pruning dead threads to the target_find_new_threads method instead, so a target may implement pruning dead threads however it wants. Once we do that, target_find_new_threads becomes a misnomer, so the patch renames it to target_update_thread_list. The patch doesn't attempt to do any optimization to any target yet. It simply exports prune_threads, and makes all implementations of target_update_thread_list call that. It's meant to be a no-op. gdb/ 2014-10-15 Pedro Alves <palves@redhat.com> * ada-tasks.c (print_ada_task_info, task_command_1): Adjust. * bsd-uthread.c (bsd_uthread_find_new_threads): Rename to ... (bsd_uthread_update_thread_list): ... this. Call prune_threads. (bsd_uthread_target): Adjust. * corelow.c (core_open): Adjust. * dec-thread.c (dec_thread_find_new_threads): Update comment. (dec_thread_update_thread_list): New function. (init_dec_thread_ops): Adjust. * gdbthread.h (prune_threads): New declaration. * linux-thread-db.c (thread_db_find_new_threads): Rename to ... (thread_db_update_thread_list): ... this. Call prune_threads. (init_thread_db_ops): Adjust. * nto-procfs.c (procfs_find_new_threads): Rename to ... (procfs_update_thread_list): ... this. Call prune_threads. (procfs_attach, procfs_create_inferior, init_procfs_targets): Adjust. * obsd-nat.c (obsd_find_new_threads): Rename to ... (obsd_update_thread_list): ... this. Call prune_threads. (obsd_add_target): Adjust. * procfs.c (procfs_target): Adjust. (procfs_notice_thread): Update comment. (procfs_find_new_threads): Rename to ... (procfs_update_thread_list): ... this. Call prune_threads. * ravenscar-thread.c (ravenscar_update_inferior_ptid): Update comment. (ravenscar_wait): Adjust. (ravenscar_find_new_threads): Rename to ... (ravenscar_update_thread_list): ... this. Call prune_threads. (init_ravenscar_thread_ops): Adjust. * record-btrace.c (record_btrace_find_new_threads): Rename to ... (record_btrace_update_thread_list): ... this. Adjust comment. (init_record_btrace_ops): Adjust. * remote.c (remote_threads_info): Rename to ... (remote_update_thread_list): ... this. Call prune_threads. (remote_start_remote, extended_remote_attach_1, init_remote_ops): Adjust. * sol-thread.c (check_for_thread_db): Adjust. (sol_find_new_threads_callback): Rename to ... (sol_update_thread_list_callback): ... this. (sol_find_new_threads): Rename to ... (sol_update_thread_list): ... this. Call prune_threads. Adjust. (sol_get_ada_task_ptid, init_sol_thread_ops): Adjust. * target-delegates.c: Regenerate. * target.c (target_find_new_threads): Rename to ... (target_update_thread_list): ... this. * target.h (struct target_ops): Rename to_find_new_threads field to to_update_thread_list. (target_find_new_threads): Rename to ... (target_update_thread_list): ... this. * thread.c (prune_threads): Make extern. (update_thread_list): Adjust.
2014-10-15 23:44:00 +02:00
ravenscar_update_thread_list (ops);
ravenscar_update_inferior_ptid ();
}
return inferior_ptid;
}
/* Add the thread associated to the given TASK to the thread list
(if the thread has already been added, this is a no-op). */
static void
ravenscar_add_thread (struct ada_task_info *task)
{
if (find_thread_ptid (task->ptid) == NULL)
add_thread (task->ptid);
}
static void
Push pruning old threads down to the target When GDB wants to sync the thread list with the target's (e.g., due to "info threads"), it calls update_thread_list: update_thread_list (void) { prune_threads (); target_find_new_threads (); update_threads_executing (); } And then prune_threads does: prune_threads (void) { struct thread_info *tp, *next; for (tp = thread_list; tp; tp = next) { next = tp->next; if (!thread_alive (tp)) delete_thread (tp->ptid); } } Calling thread_live on each thread one by one is expensive. E.g., on Linux, it ends up doing kill(SIG0) once for each thread. Not a big deal, but still a bunch of syscalls... With the remote target, it's cumbersome. That thread_alive call ends up generating one T packet per thread: Sending packet: $Tp2141.2150#82...Packet received: OK Sending packet: $Tp2141.214f#b7...Packet received: OK Sending packet: $Tp2141.2141#82...Packet received: OK Sending packet: $qXfer:threads:read::0,fff#03...Packet received: l<threads>\n<thread id="p2141.2141" core="2"/>\n<thread id="p2141.214f" core="1"/>\n<thread id="p2141.2150" core="2"/>\n</threads>\n That seems a bit silly when target_find_new_threads method implementations will always fetch the whole current set of target threads, and then add those that are not in GDB's thread list, to GDB's thread list. This patch thus pushes down the responsibility of pruning dead threads to the target_find_new_threads method instead, so a target may implement pruning dead threads however it wants. Once we do that, target_find_new_threads becomes a misnomer, so the patch renames it to target_update_thread_list. The patch doesn't attempt to do any optimization to any target yet. It simply exports prune_threads, and makes all implementations of target_update_thread_list call that. It's meant to be a no-op. gdb/ 2014-10-15 Pedro Alves <palves@redhat.com> * ada-tasks.c (print_ada_task_info, task_command_1): Adjust. * bsd-uthread.c (bsd_uthread_find_new_threads): Rename to ... (bsd_uthread_update_thread_list): ... this. Call prune_threads. (bsd_uthread_target): Adjust. * corelow.c (core_open): Adjust. * dec-thread.c (dec_thread_find_new_threads): Update comment. (dec_thread_update_thread_list): New function. (init_dec_thread_ops): Adjust. * gdbthread.h (prune_threads): New declaration. * linux-thread-db.c (thread_db_find_new_threads): Rename to ... (thread_db_update_thread_list): ... this. Call prune_threads. (init_thread_db_ops): Adjust. * nto-procfs.c (procfs_find_new_threads): Rename to ... (procfs_update_thread_list): ... this. Call prune_threads. (procfs_attach, procfs_create_inferior, init_procfs_targets): Adjust. * obsd-nat.c (obsd_find_new_threads): Rename to ... (obsd_update_thread_list): ... this. Call prune_threads. (obsd_add_target): Adjust. * procfs.c (procfs_target): Adjust. (procfs_notice_thread): Update comment. (procfs_find_new_threads): Rename to ... (procfs_update_thread_list): ... this. Call prune_threads. * ravenscar-thread.c (ravenscar_update_inferior_ptid): Update comment. (ravenscar_wait): Adjust. (ravenscar_find_new_threads): Rename to ... (ravenscar_update_thread_list): ... this. Call prune_threads. (init_ravenscar_thread_ops): Adjust. * record-btrace.c (record_btrace_find_new_threads): Rename to ... (record_btrace_update_thread_list): ... this. Adjust comment. (init_record_btrace_ops): Adjust. * remote.c (remote_threads_info): Rename to ... (remote_update_thread_list): ... this. Call prune_threads. (remote_start_remote, extended_remote_attach_1, init_remote_ops): Adjust. * sol-thread.c (check_for_thread_db): Adjust. (sol_find_new_threads_callback): Rename to ... (sol_update_thread_list_callback): ... this. (sol_find_new_threads): Rename to ... (sol_update_thread_list): ... this. Call prune_threads. Adjust. (sol_get_ada_task_ptid, init_sol_thread_ops): Adjust. * target-delegates.c: Regenerate. * target.c (target_find_new_threads): Rename to ... (target_update_thread_list): ... this. * target.h (struct target_ops): Rename to_find_new_threads field to to_update_thread_list. (target_find_new_threads): Rename to ... (target_update_thread_list): ... this. * thread.c (prune_threads): Make extern. (update_thread_list): Adjust.
2014-10-15 23:44:00 +02:00
ravenscar_update_thread_list (struct target_ops *ops)
{
ada_build_task_list ();
/* Do not clear the thread list before adding the Ada task, to keep
the thread that the process stratum has included into it
(base_ptid) and the running thread, that may not have been included
to system.tasking.debug's list yet. */
iterate_over_live_ada_tasks (ravenscar_add_thread);
}
static ptid_t
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
ravenscar_active_task (int cpu)
{
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
CORE_ADDR tid = get_running_thread_id (cpu);
if (tid == 0)
return null_ptid;
else
return ptid_build (ptid_get_pid (base_ptid), 0, tid);
}
-Wwrite-strings: Constify target_pid_to_str and target_thread_extra_thread_info -Wwrite-strings flagged a missing cast for example here: static char * ravenscar_extra_thread_info (struct target_ops *self, struct thread_info *tp) { return "Ravenscar task"; Since callers are not supposed to free the string returned by these methods, change the methods' signature to return const strings. gdb/ChangeLog: 2017-04-05 Pedro Alves <palves@redhat.com> * aix-thread.c (aix_thread_pid_to_str) (aix_thread_extra_thread_info): Constify. * bsd-kvm.c (bsd_kvm_pid_to_str): Constify. * bsd-uthread.c (bsd_uthread_extra_thread_info) (bsd_uthread_pid_to_str): Constify. * corelow.c (core_pid_to_str): Constify. * darwin-nat.c (darwin_pid_to_str): Constify. * fbsd-nat.c (fbsd_pid_to_str): Constify. * fbsd-tdep.c (fbsd_core_pid_to_str, gdbarch_core_pid_to_str): Constify. * gnu-nat.c (gnu_pid_to_str): Constify. * go32-nat.c (go32_pid_to_str): Constify. * i386-cygwin-tdep.c (i386_windows_core_pid_to_str): Constify. * inf-ptrace.c (inf_ptrace_pid_to_str): Constify. * inferior.c (inferior_pid_to_str): Constify. * linux-nat.c (linux_nat_pid_to_str): Constify. * linux-tdep.c (linux_core_pid_to_str): Constify. * linux-thread-db.c (thread_db_pid_to_str) (thread_db_extra_thread_info): Constify. * nto-tdep.c (nto_extra_thread_info): Constify. * nto-tdep.h (nto_extra_thread_info): Constify. * obsd-nat.c (obsd_pid_to_str): Constify. * procfs.c (procfs_pid_to_str): Constify. * ravenscar-thread.c (ravenscar_extra_thread_info) (ravenscar_pid_to_str): Constify. * remote-sim.c (gdbsim_pid_to_str): Constify. * remote.c (remote_threads_extra_info, remote_pid_to_str): Constify. * sol-thread.c (solaris_pid_to_str): Constify. * sol2-tdep.c (sol2_core_pid_to_str): Constify. * sol2-tdep.h (sol2_core_pid_to_str): Constify. * target.c (default_pid_to_str, target_pid_to_str) (normal_pid_to_str, default_pid_to_str): Constify. * target.h (target_ops::to_pid_to_str) (target_ops::to_extra_thread_info): Constify. (target_pid_to_str, normal_pid_to_str): Constify. * windows-nat.c (windows_pid_to_str): Constify. * gdbarch.sh (core_pid_to_str): Constify. * target-delegates.c: Regenerate. * gdbarch.h, gdbarch.c: Regenerate.
2017-04-05 20:21:34 +02:00
static const char *
ravenscar_extra_thread_info (struct target_ops *self, struct thread_info *tp)
{
return "Ravenscar task";
}
static int
ravenscar_thread_alive (struct target_ops *ops, ptid_t ptid)
{
/* Ravenscar tasks are non-terminating. */
return 1;
}
-Wwrite-strings: Constify target_pid_to_str and target_thread_extra_thread_info -Wwrite-strings flagged a missing cast for example here: static char * ravenscar_extra_thread_info (struct target_ops *self, struct thread_info *tp) { return "Ravenscar task"; Since callers are not supposed to free the string returned by these methods, change the methods' signature to return const strings. gdb/ChangeLog: 2017-04-05 Pedro Alves <palves@redhat.com> * aix-thread.c (aix_thread_pid_to_str) (aix_thread_extra_thread_info): Constify. * bsd-kvm.c (bsd_kvm_pid_to_str): Constify. * bsd-uthread.c (bsd_uthread_extra_thread_info) (bsd_uthread_pid_to_str): Constify. * corelow.c (core_pid_to_str): Constify. * darwin-nat.c (darwin_pid_to_str): Constify. * fbsd-nat.c (fbsd_pid_to_str): Constify. * fbsd-tdep.c (fbsd_core_pid_to_str, gdbarch_core_pid_to_str): Constify. * gnu-nat.c (gnu_pid_to_str): Constify. * go32-nat.c (go32_pid_to_str): Constify. * i386-cygwin-tdep.c (i386_windows_core_pid_to_str): Constify. * inf-ptrace.c (inf_ptrace_pid_to_str): Constify. * inferior.c (inferior_pid_to_str): Constify. * linux-nat.c (linux_nat_pid_to_str): Constify. * linux-tdep.c (linux_core_pid_to_str): Constify. * linux-thread-db.c (thread_db_pid_to_str) (thread_db_extra_thread_info): Constify. * nto-tdep.c (nto_extra_thread_info): Constify. * nto-tdep.h (nto_extra_thread_info): Constify. * obsd-nat.c (obsd_pid_to_str): Constify. * procfs.c (procfs_pid_to_str): Constify. * ravenscar-thread.c (ravenscar_extra_thread_info) (ravenscar_pid_to_str): Constify. * remote-sim.c (gdbsim_pid_to_str): Constify. * remote.c (remote_threads_extra_info, remote_pid_to_str): Constify. * sol-thread.c (solaris_pid_to_str): Constify. * sol2-tdep.c (sol2_core_pid_to_str): Constify. * sol2-tdep.h (sol2_core_pid_to_str): Constify. * target.c (default_pid_to_str, target_pid_to_str) (normal_pid_to_str, default_pid_to_str): Constify. * target.h (target_ops::to_pid_to_str) (target_ops::to_extra_thread_info): Constify. (target_pid_to_str, normal_pid_to_str): Constify. * windows-nat.c (windows_pid_to_str): Constify. * gdbarch.sh (core_pid_to_str): Constify. * target-delegates.c: Regenerate. * gdbarch.h, gdbarch.c: Regenerate.
2017-04-05 20:21:34 +02:00
static const char *
ravenscar_pid_to_str (struct target_ops *ops, ptid_t ptid)
{
static char buf[30];
snprintf (buf, sizeof (buf), "Thread %#x", (int) ptid_get_tid (ptid));
return buf;
}
static void
ravenscar_fetch_registers (struct target_ops *ops,
struct regcache *regcache, int regnum)
{
struct target_ops *beneath = find_target_beneath (ops);
Use ptid from regcache in almost all remaining nat files This patch contains almost all of the remaining changes needed to make to_fetch_registers/to_store_registers/to_prepare_to_store independent of inferior_ptid. It contains only some "trivial" changes, the more complicated ones are in separate patches. gdb/ChangeLog: * i386-linux-nat.c (fetch_register, store_register, i386_linux_fetch_inferior_registers, i386_linux_store_inferior_registers): Use ptid from regcache. * ia64-linux-nat.c (ia64_linux_fetch_register, ia64_linux_store_register): Likewise. * inf-ptrace.c (inf_ptrace_fetch_register, inf_ptrace_store_register): Likewise. * m32r-linux-nat.c (m32r_linux_fetch_inferior_registers, m32r_linux_store_inferior_registers): Likewise. * m68k-bsd-nat.c (m68kbsd_fetch_inferior_registers, m68kbsd_store_inferior_registers): Likewise. * m68k-linux-nat.c (fetch_register, store_register, m68k_linux_fetch_inferior_registers, m68k_linux_store_inferior_registers): Likewise. * m88k-bsd-nat.c (m88kbsd_fetch_inferior_registers, m88kbsd_store_inferior_registers): Likewise. * mips-fbsd-nat.c (mips_fbsd_fetch_inferior_registers, mips_fbsd_store_inferior_registers): Likewise. * mips-linux-nat.c (mips64_linux_regsets_fetch_registers, mips64_linux_regsets_store_registers): Likewise. * mips-nbsd-nat.c (mipsnbsd_fetch_inferior_registers, mipsnbsd_store_inferior_registers): Likewise. * mips-obsd-nat.c (mips64obsd_fetch_inferior_registers, mips64obsd_store_inferior_registers): Likewise. * nto-procfs.c (procfs_fetch_registers, procfs_store_registers): Likewise. * ppc-fbsd-nat.c (ppcfbsd_fetch_inferior_registers, ppcfbsd_store_inferior_registers): Likewise. * ppc-linux-nat.c (ppc_linux_fetch_inferior_registers, ppc_linux_store_inferior_registers): Likewise. * ppc-nbsd-nat.c (ppcnbsd_fetch_inferior_registers, ppcnbsd_store_inferior_registers): Likewise. * ppc-obsd-nat.c (ppcobsd_fetch_registers, ppcobsd_store_registers): Likewise. * procfs.c (procfs_fetch_registers, procfs_store_registers): Likewise. * ravenscar-thread.c (ravenscar_fetch_registers, ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. * record-btrace.c (record_btrace_fetch_registers, record_btrace_store_registers, record_btrace_prepare_to_store): Likewise. * remote-sim.c (gdbsim_fetch_register, gdbsim_store_register): Lookup inferior using ptid from regcache, instead of current_inferior. * remote.c (remote_fetch_registers, remote_store_registers): Use ptid from regcache. * rs6000-nat.c (fetch_register, store_register): Likewise. * s390-linux-nat.c (s390_linux_fetch_inferior_registers, s390_linux_store_inferior_registers): Likewise. * sh-nbsd-nat.c (shnbsd_fetch_inferior_registers, shnbsd_store_inferior_registers): Likewise. * sol-thread.c (sol_thread_fetch_registers, sol_thread_store_registers): Likewise. * sparc-nat.c (sparc_fetch_inferior_registers, sparc_store_inferior_registers): Likewise. * tilegx-linux-nat.c (fetch_inferior_registers, store_inferior_registers): Likewise. * vax-bsd-nat.c (vaxbsd_fetch_inferior_registers, vaxbsd_store_inferior_registers): Likewise. * xtensa-linux-nat.c (fetch_gregs, store_gregs, fetch_xtregs, store_xtregs): Likewise.
2017-03-20 22:37:36 +01:00
ptid_t ptid = regcache_get_ptid (regcache);
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
if (ravenscar_runtime_initialized ()
&& is_ravenscar_task (ptid)
&& !ravenscar_task_is_currently_active (ptid))
{
s/get_regcache_arch (regcache)/regcache->arch ()/g This patches removes get_regcache_arch, and use regache->arch () instead. The motivation of this change is that I am going to move some basic stuff into a base class of regcache. I don't need to update "client" code regcache->arch (). On the other hand, this patch shortens the code a little bit. gdb: 2017-10-25 Yao Qi <yao.qi@linaro.org> * aarch32-linux-nat.c (aarch32_gp_regcache_supply): Use regcache->arch () instead get_regcache_arch. * aarch64-fbsd-nat.c (aarch64_fbsd_fetch_inferior_registers): Likewise. (aarch64_fbsd_store_inferior_registers): Likewise. * aarch64-linux-nat.c (fetch_gregs_from_thread): Likewise. (store_gregs_to_thread): Likewise. (fetch_fpregs_from_thread): Likewise. (store_fpregs_to_thread): Likewise. * aarch64-tdep.c (aarch64_extract_return_value): Likewise. (aarch64_store_return_value): Likewise. (aarch64_software_single_step): Likewise. * aix-thread.c (aix_thread_wait): Likewise. (supply_reg32): Likewise. (supply_sprs64): Likewise. (supply_sprs32): Likewise. (fill_gprs64): Likewise. (fill_gprs32): Likewise. (fill_sprs64): Likewise. (fill_sprs32): Likewise. (store_regs_user_thread): Likewise. (store_regs_kernel_thread): Likewise. * alpha-bsd-nat.c (alphabsd_fetch_inferior_registers): Likewise. (alphabsd_store_inferior_registers): Likewise. * alpha-tdep.c (alpha_extract_return_value): Likewise. (alpha_store_return_value): Likewise. (alpha_deal_with_atomic_sequence): Likewise. (alpha_next_pc): Likewise. (alpha_software_single_step): Likewise. * amd64-bsd-nat.c (amd64bsd_fetch_inferior_registers): Likewise. (amd64bsd_store_inferior_registers): Likewise. * amd64-linux-nat.c (amd64_linux_fetch_inferior_registers): Likewise. (amd64_linux_store_inferior_registers): Likewise. * amd64-nat.c (amd64_supply_native_gregset): Likewise. (amd64_collect_native_gregset): Likewise. * amd64-obsd-tdep.c (amd64obsd_supply_uthread): Likewise. (amd64obsd_collect_uthread): Likewise. * amd64-tdep.c (amd64_supply_fpregset): Likewise. (amd64_collect_fpregset): Likewise. (amd64_supply_fxsave): Likewise. (amd64_supply_xsave): Likewise. (amd64_collect_fxsave): Likewise. (amd64_collect_xsave): Likewise. * arc-tdep.c (arc_write_pc): Likewise. * arch-utils.c (default_skip_permanent_breakpoint): Likewise. * arm-fbsd-nat.c (arm_fbsd_fetch_inferior_registers): Likewise. (arm_fbsd_store_inferior_registers): Likewise. * arm-linux-nat.c (fetch_vfp_regs): Likewise. (store_vfp_regs): Likewise. (arm_linux_fetch_inferior_registers): Likewise. (arm_linux_store_inferior_registers): Likewise. * arm-linux-tdep.c (arm_linux_supply_gregset): Likewise. (arm_linux_sigreturn_next_pc): Likewise. (arm_linux_get_next_pcs_syscall_next_pc): Likewise. * arm-nbsd-nat.c (arm_supply_gregset): Likewise. (fetch_register): Likewise. (store_register): Likewise. * arm-tdep.c (arm_is_thumb): Likewise. (displaced_in_arm_mode): Likewise. (bx_write_pc): Likewise. (arm_get_next_pcs_addr_bits_remove): Likewise. (arm_software_single_step): Likewise. (arm_extract_return_value): Likewise. (arm_store_return_value): Likewise. (arm_write_pc): Likewise. * bfin-tdep.c (bfin_extract_return_value): Likewise. * bsd-uthread.c (bsd_uthread_fetch_registers): Likewise. (bsd_uthread_store_registers): Likewise. * core-regset.c (fetch_core_registers): Likewise. * corelow.c (get_core_registers): Likewise. * cris-tdep.c (cris_store_return_value): Likewise. (cris_extract_return_value): Likewise. (find_step_target): Likewise. (find_step_target): Likewise. (cris_software_single_step): Likewise. * ctf.c (ctf_fetch_registers): Likewise. * darwin-nat.c (cancel_breakpoint): Likewise. * fbsd-tdep.c (fbsd_collect_thread_registers): Likewise. * frv-tdep.c (frv_extract_return_value): Likewise. * ft32-tdep.c (ft32_store_return_value): Likewise. (ft32_extract_return_value): Likewise. * go32-nat.c (fetch_register): Likewise. (go32_fetch_registers): Likewise. (go32_store_registers): Likewise. (store_register): Likewise. * h8300-tdep.c (h8300_extract_return_value): Likewise. (h8300_store_return_value): Likewise. * hppa-linux-nat.c (fetch_register): Likewise. (store_register): Likewise. (hppa_linux_fetch_inferior_registers): Likewise. (hppa_linux_store_inferior_registers): Likewise. * i386-darwin-nat.c (i386_darwin_fetch_inferior_registers): Likewise. (i386_darwin_store_inferior_registers): Likewise. * i386-gnu-nat.c (gnu_fetch_registers): Likewise. (gnu_store_registers): Likewise. * i386-linux-nat.c (fetch_register): Likewise. (store_register): Likewise. (supply_gregset): Likewise. (fill_gregset): Likewise. (i386_linux_fetch_inferior_registers): Likewise. (i386_linux_store_inferior_registers): Likewise. (i386_linux_resume): Likewise. * i386-linux-tdep.c (i386_linux_get_syscall_number_from_regcache): Likewise. * i386-nto-tdep.c (i386nto_supply_gregset): Likewise. * i386-obsd-nat.c (i386obsd_supply_pcb): Likewise. * i386-obsd-tdep.c (i386obsd_supply_uthread): Likewise. (i386obsd_collect_uthread): Likewise. * i386-tdep.c (i386_mmx_regnum_to_fp_regnum): Likewise. (i386_supply_gregset): Likewise. (i386_collect_gregset): Likewise. (i386_supply_fpregset): Likewise. (i386_collect_fpregset): Likewise. (i386_mpx_bd_base): Likewise. * i386-v4-nat.c (supply_fpregset): Likewise. (fill_fpregset): Likewise. * i387-tdep.c (i387_supply_fsave): Likewise. (i387_collect_fsave): Likewise. (i387_supply_fxsave): Likewise. (i387_collect_fxsave): Likewise. (i387_supply_xsave): Likewise. (i387_collect_xsave): Likewise. * ia64-linux-nat.c (ia64_linux_fetch_registers): Likewise. (ia64_linux_store_registers): Likewise. * ia64-tdep.c (ia64_access_rse_reg): Likewise. (ia64_extract_return_value): Likewise. (ia64_store_return_value): Likewise. (find_func_descr): Likewise. * inf-child.c (inf_child_fetch_inferior_registers): Likewise. * inf-ptrace.c (inf_ptrace_fetch_registers): Likewise. (inf_ptrace_store_registers): Likewise. * infrun.c (use_displaced_stepping): Likewise. (displaced_step_prepare_throw): Likewise. (resume): Likewise. (proceed): Likewise. (do_target_wait): Likewise. (adjust_pc_after_break): Likewise. (handle_inferior_event_1): Likewise. (handle_signal_stop): Likewise. (save_infcall_suspend_state): Likewise. (restore_infcall_suspend_state): Likewise. * iq2000-tdep.c (iq2000_extract_return_value): Likewise. * jit.c (jit_frame_prev_register): Likewise. * linux-nat.c (save_stop_reason): Likewise. (linux_nat_wait_1): Likewise. (resume_stopped_resumed_lwps): Likewise. * linux-record.c (record_linux_sockaddr): Likewise. (record_linux_msghdr): Likewise. (record_linux_system_call): Likewise. * linux-tdep.c (linux_collect_thread_registers): Likewise. * lm32-tdep.c (lm32_extract_return_value): Likewise. (lm32_store_return_value): Likewise. * m32c-tdep.c (m32c_read_flg): Likewise. (m32c_pseudo_register_read): Likewise. (m32c_pseudo_register_write): Likewise. * m32r-linux-tdep.c (m32r_linux_supply_gregset): Likewise. (m32r_linux_collect_gregset): Likewise. * m32r-tdep.c (m32r_store_return_value): Likewise. (m32r_extract_return_value): Likewise. * m68k-bsd-nat.c (m68kbsd_supply_fpregset): Likewise. (m68kbsd_collect_fpregset): Likewise. * m68k-bsd-tdep.c (m68kbsd_supply_fpregset): Likewise. * m68k-linux-nat.c (fetch_register): Likewise. (old_fetch_inferior_registers): Likewise. (old_store_inferior_registers): Likewise. (store_regs): Likewise. * m68k-tdep.c (m68k_svr4_extract_return_value): Likewise. (m68k_svr4_store_return_value): Likewise. * m88k-tdep.c (m88k_store_arguments): Likewise. * mi/mi-main.c (mi_cmd_data_list_changed_registers): Likewise. (mi_cmd_data_write_register_values): Likewise. * mips-fbsd-nat.c (mips_fbsd_fetch_inferior_registers): Likewise. (mips_fbsd_store_inferior_registers): Likewise. * mips-fbsd-tdep.c (mips_fbsd_supply_fpregs): Likewise. (mips_fbsd_supply_gregs): Likewise. (mips_fbsd_collect_fpregs): Likewise. (mips_fbsd_collect_gregs): Likewise. (mips_fbsd_supply_fpregset): Likewise. (mips_fbsd_collect_fpregset): Likewise. (mips_fbsd_supply_gregset): Likewise. (mips_fbsd_collect_gregset): Likewise. * mips-linux-nat.c (supply_gregset): Likewise. (fill_gregset): Likewise. (supply_fpregset): Likewise. (fill_fpregset): Likewise. * mips-linux-tdep.c (mips_supply_gregset): Likewise. (mips_fill_gregset): Likewise. (mips_supply_fpregset): Likewise. (mips_fill_fpregset): Likewise. (mips64_supply_gregset): Likewise. (micromips_linux_sigframe_validate): Likewise. * mips-nbsd-nat.c (mipsnbsd_fetch_inferior_registers): Likewise. (mipsnbsd_fetch_inferior_registers): Likewise. (mipsnbsd_store_inferior_registers): Likewise. * mips-nbsd-tdep.c (mipsnbsd_supply_fpregset): Likewise. (mipsnbsd_supply_gregset): Likewise. (mipsnbsd_iterate_over_regset_sections): Likewise. (mipsnbsd_supply_reg): Likewise. (mipsnbsd_supply_fpreg): Likewise. * mips-tdep.c (mips_in_frame_stub): Likewise. (mips_dummy_id): Likewise. (is_octeon_bbit_op): Likewise. (micromips_bc1_pc): Likewise. (extended_mips16_next_pc): Likewise. (mips16_next_pc): Likewise. (deal_with_atomic_sequence): Likewise. * moxie-tdep.c (moxie_process_readu): Likewise. * nios2-tdep.c (nios2_get_next_pc): Likewise. * nto-procfs.c (procfs_store_registers): Likewise. * ppc-fbsd-nat.c (ppcfbsd_fetch_inferior_registers): Likewise. (ppcfbsd_store_inferior_registers): Likewise. * ppc-linux-nat.c (fetch_vsx_register): Likewise. (fetch_altivec_register): Likewise. (get_spe_registers): Likewise. (fetch_spe_register): Likewise. (fetch_altivec_registers): Likewise. (fetch_all_gp_regs): Likewise. (fetch_all_fp_regs): Likewise. (store_vsx_register): Likewise. (store_altivec_register): Likewise. (set_spe_registers): Likewise. (store_spe_register): Likewise. (store_altivec_registers): Likewise. (store_all_gp_regs): Likewise. (store_all_fp_regs): Likewise. * ppc-linux-tdep.c (ppc_linux_supply_gregset): Likewise. (ppc_linux_collect_gregset): Likewise. (ppc_canonicalize_syscall): Likewise. (ppc_linux_record_signal): Likewise. (ppu2spu_prev_register): Likewise. * ppc-nbsd-nat.c (ppcnbsd_supply_pcb): Likewise. * ppc-obsd-nat.c (ppcobsd_fetch_registers): Likewise. (ppcobsd_store_registers): Likewise. * ppc-ravenscar-thread.c (ppc_ravenscar_generic_fetch_registers): Likewise. (ppc_ravenscar_generic_store_registers): Likewise. * procfs.c (procfs_fetch_registers): Likewise. (procfs_store_registers): Likewise. * ravenscar-thread.c (ravenscar_fetch_registers): Likewise. (ravenscar_store_registers): Likewise. (ravenscar_prepare_to_store): Likewise. * record-btrace.c (record_btrace_fetch_registers): Likewise. * record-full.c (record_full_wait_1): Likewise. (record_full_registers_change): Likewise. (record_full_store_registers): Likewise. (record_full_core_fetch_registers): Likewise. (record_full_save): Likewise. (record_full_goto_insn): Likewise. * regcache.c (regcache_register_size): Likewise. (get_regcache_arch): Remove. (regcache_read_pc): Likewise. * regcache.h (get_regcache_arch): Remove. * remote-sim.c (gdbsim_fetch_register): Likewise. (gdbsim_store_register): Likewise. * remote.c (fetch_register_using_p): Likewise. (send_g_packet): Likewise. (remote_prepare_to_store): Likewise. (store_registers_using_G): Likewise. * reverse.c (save_bookmark_command): Likewise. (goto_bookmark_command): Likewise. * rs6000-aix-tdep.c (branch_dest): Likewise. * rs6000-nat.c (rs6000_ptrace64): Likewise. (fetch_register): Likewise. * rs6000-tdep.c (ppc_supply_reg): Likewise. (ppc_collect_reg): Likewise. (ppc_collect_gregset): Likewise. (ppc_collect_fpregset): Likewise. (ppc_collect_vsxregset): Likewise. (ppc_collect_vrregset): Likewise. (ppc_displaced_step_hw_singlestep): Likewise. (rs6000_pseudo_register_read): Likewise. (rs6000_pseudo_register_write): Likewise. * s390-linux-nat.c (supply_gregset): Likewise. (fill_gregset): Likewise. (s390_linux_fetch_inferior_registers): Likewise. * s390-linux-tdep.c (s390_write_pc): Likewise. (s390_software_single_step): Likewise. (s390_all_but_pc_registers_record): Likewise. (s390_linux_syscall_record): Likewise. * sentinel-frame.c (sentinel_frame_prev_arch): Likewise. * sh-nbsd-nat.c (shnbsd_fetch_inferior_registers): Likewise. (shnbsd_store_inferior_registers): Likewise. * sh-tdep.c (sh_extract_return_value_nofpu): Likewise. (sh_extract_return_value_fpu): Likewise. (sh_store_return_value_nofpu): Likewise. (sh_corefile_supply_regset): Likewise. (sh_corefile_collect_regset): Likewise. * sh64-tdep.c (sh64_extract_return_value): Likewise. (sh64_store_return_value): Likewise. * sparc-linux-tdep.c (sparc32_linux_collect_core_fpregset): Likewise. * sparc-nat.c (sparc_fetch_inferior_registers): Likewise. (sparc_store_inferior_registers): Likewise. * sparc-ravenscar-thread.c (register_in_thread_descriptor_p): Likewise. (sparc_ravenscar_prepare_to_store): Likewise. * sparc-tdep.c (sparc32_store_arguments): Likewise. (sparc_analyze_control_transfer): Likewise. (sparc_step_trap): Likewise. (sparc_software_single_step): Likewise. (sparc32_gdbarch_init): Likewise. (sparc_supply_rwindow): Likewise. (sparc_collect_rwindow): Likewise. * sparc64-linux-tdep.c (sparc64_linux_collect_core_fpregset): Likewise. * sparc64-nbsd-nat.c (sparc64nbsd_supply_gregset): Likewise. (sparc64nbsd_collect_gregset): Likewise. (sparc64nbsd_supply_fpregset): Likewise. (sparc64nbsd_collect_fpregset): Likewise. * sparc64-tdep.c (sparc64_store_arguments): Likewise. (sparc64_supply_gregset): Likewise. (sparc64_collect_gregset): Likewise. (sparc64_supply_fpregset): Likewise. (sparc64_collect_fpregset): Likewise. * spu-linux-nat.c (spu_fetch_inferior_registers): Likewise. * spu-tdep.c (spu_unwind_sp): Likewise. (spu2ppu_prev_register): Likewise. (spu_memory_remove_breakpoint): Likewise. * stack.c (return_command): Likewise. * tic6x-tdep.c (tic6x_extract_signed_field): Likewise. * tracefile-tfile.c (tfile_fetch_registers): Likewise. * tracefile.c (trace_save_ctf): Likewise. * windows-nat.c (do_windows_fetch_inferior_registers): Likewise. (do_windows_store_inferior_registers): Likewise. (windows_resume): Likewise. * xtensa-linux-nat.c (fill_gregset): Likewise. (supply_gregset_reg): Likewise. * xtensa-tdep.c (xtensa_register_write_masked): Likewise. (xtensa_register_read_masked): Likewise. (xtensa_supply_gregset): Likewise. (xtensa_extract_return_value): Likewise. (xtensa_store_return_value): Likewise.
2017-10-25 17:37:03 +02:00
struct gdbarch *gdbarch = regcache->arch ();
struct ravenscar_arch_ops *arch_ops
= gdbarch_ravenscar_ops (gdbarch);
arch_ops->to_fetch_registers (regcache, regnum);
}
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
else
beneath->to_fetch_registers (beneath, regcache, regnum);
}
static void
ravenscar_store_registers (struct target_ops *ops,
struct regcache *regcache, int regnum)
{
struct target_ops *beneath = find_target_beneath (ops);
Use ptid from regcache in almost all remaining nat files This patch contains almost all of the remaining changes needed to make to_fetch_registers/to_store_registers/to_prepare_to_store independent of inferior_ptid. It contains only some "trivial" changes, the more complicated ones are in separate patches. gdb/ChangeLog: * i386-linux-nat.c (fetch_register, store_register, i386_linux_fetch_inferior_registers, i386_linux_store_inferior_registers): Use ptid from regcache. * ia64-linux-nat.c (ia64_linux_fetch_register, ia64_linux_store_register): Likewise. * inf-ptrace.c (inf_ptrace_fetch_register, inf_ptrace_store_register): Likewise. * m32r-linux-nat.c (m32r_linux_fetch_inferior_registers, m32r_linux_store_inferior_registers): Likewise. * m68k-bsd-nat.c (m68kbsd_fetch_inferior_registers, m68kbsd_store_inferior_registers): Likewise. * m68k-linux-nat.c (fetch_register, store_register, m68k_linux_fetch_inferior_registers, m68k_linux_store_inferior_registers): Likewise. * m88k-bsd-nat.c (m88kbsd_fetch_inferior_registers, m88kbsd_store_inferior_registers): Likewise. * mips-fbsd-nat.c (mips_fbsd_fetch_inferior_registers, mips_fbsd_store_inferior_registers): Likewise. * mips-linux-nat.c (mips64_linux_regsets_fetch_registers, mips64_linux_regsets_store_registers): Likewise. * mips-nbsd-nat.c (mipsnbsd_fetch_inferior_registers, mipsnbsd_store_inferior_registers): Likewise. * mips-obsd-nat.c (mips64obsd_fetch_inferior_registers, mips64obsd_store_inferior_registers): Likewise. * nto-procfs.c (procfs_fetch_registers, procfs_store_registers): Likewise. * ppc-fbsd-nat.c (ppcfbsd_fetch_inferior_registers, ppcfbsd_store_inferior_registers): Likewise. * ppc-linux-nat.c (ppc_linux_fetch_inferior_registers, ppc_linux_store_inferior_registers): Likewise. * ppc-nbsd-nat.c (ppcnbsd_fetch_inferior_registers, ppcnbsd_store_inferior_registers): Likewise. * ppc-obsd-nat.c (ppcobsd_fetch_registers, ppcobsd_store_registers): Likewise. * procfs.c (procfs_fetch_registers, procfs_store_registers): Likewise. * ravenscar-thread.c (ravenscar_fetch_registers, ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. * record-btrace.c (record_btrace_fetch_registers, record_btrace_store_registers, record_btrace_prepare_to_store): Likewise. * remote-sim.c (gdbsim_fetch_register, gdbsim_store_register): Lookup inferior using ptid from regcache, instead of current_inferior. * remote.c (remote_fetch_registers, remote_store_registers): Use ptid from regcache. * rs6000-nat.c (fetch_register, store_register): Likewise. * s390-linux-nat.c (s390_linux_fetch_inferior_registers, s390_linux_store_inferior_registers): Likewise. * sh-nbsd-nat.c (shnbsd_fetch_inferior_registers, shnbsd_store_inferior_registers): Likewise. * sol-thread.c (sol_thread_fetch_registers, sol_thread_store_registers): Likewise. * sparc-nat.c (sparc_fetch_inferior_registers, sparc_store_inferior_registers): Likewise. * tilegx-linux-nat.c (fetch_inferior_registers, store_inferior_registers): Likewise. * vax-bsd-nat.c (vaxbsd_fetch_inferior_registers, vaxbsd_store_inferior_registers): Likewise. * xtensa-linux-nat.c (fetch_gregs, store_gregs, fetch_xtregs, store_xtregs): Likewise.
2017-03-20 22:37:36 +01:00
ptid_t ptid = regcache_get_ptid (regcache);
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
if (ravenscar_runtime_initialized ()
&& is_ravenscar_task (ptid)
&& !ravenscar_task_is_currently_active (ptid))
{
s/get_regcache_arch (regcache)/regcache->arch ()/g This patches removes get_regcache_arch, and use regache->arch () instead. The motivation of this change is that I am going to move some basic stuff into a base class of regcache. I don't need to update "client" code regcache->arch (). On the other hand, this patch shortens the code a little bit. gdb: 2017-10-25 Yao Qi <yao.qi@linaro.org> * aarch32-linux-nat.c (aarch32_gp_regcache_supply): Use regcache->arch () instead get_regcache_arch. * aarch64-fbsd-nat.c (aarch64_fbsd_fetch_inferior_registers): Likewise. (aarch64_fbsd_store_inferior_registers): Likewise. * aarch64-linux-nat.c (fetch_gregs_from_thread): Likewise. (store_gregs_to_thread): Likewise. (fetch_fpregs_from_thread): Likewise. (store_fpregs_to_thread): Likewise. * aarch64-tdep.c (aarch64_extract_return_value): Likewise. (aarch64_store_return_value): Likewise. (aarch64_software_single_step): Likewise. * aix-thread.c (aix_thread_wait): Likewise. (supply_reg32): Likewise. (supply_sprs64): Likewise. (supply_sprs32): Likewise. (fill_gprs64): Likewise. (fill_gprs32): Likewise. (fill_sprs64): Likewise. (fill_sprs32): Likewise. (store_regs_user_thread): Likewise. (store_regs_kernel_thread): Likewise. * alpha-bsd-nat.c (alphabsd_fetch_inferior_registers): Likewise. (alphabsd_store_inferior_registers): Likewise. * alpha-tdep.c (alpha_extract_return_value): Likewise. (alpha_store_return_value): Likewise. (alpha_deal_with_atomic_sequence): Likewise. (alpha_next_pc): Likewise. (alpha_software_single_step): Likewise. * amd64-bsd-nat.c (amd64bsd_fetch_inferior_registers): Likewise. (amd64bsd_store_inferior_registers): Likewise. * amd64-linux-nat.c (amd64_linux_fetch_inferior_registers): Likewise. (amd64_linux_store_inferior_registers): Likewise. * amd64-nat.c (amd64_supply_native_gregset): Likewise. (amd64_collect_native_gregset): Likewise. * amd64-obsd-tdep.c (amd64obsd_supply_uthread): Likewise. (amd64obsd_collect_uthread): Likewise. * amd64-tdep.c (amd64_supply_fpregset): Likewise. (amd64_collect_fpregset): Likewise. (amd64_supply_fxsave): Likewise. (amd64_supply_xsave): Likewise. (amd64_collect_fxsave): Likewise. (amd64_collect_xsave): Likewise. * arc-tdep.c (arc_write_pc): Likewise. * arch-utils.c (default_skip_permanent_breakpoint): Likewise. * arm-fbsd-nat.c (arm_fbsd_fetch_inferior_registers): Likewise. (arm_fbsd_store_inferior_registers): Likewise. * arm-linux-nat.c (fetch_vfp_regs): Likewise. (store_vfp_regs): Likewise. (arm_linux_fetch_inferior_registers): Likewise. (arm_linux_store_inferior_registers): Likewise. * arm-linux-tdep.c (arm_linux_supply_gregset): Likewise. (arm_linux_sigreturn_next_pc): Likewise. (arm_linux_get_next_pcs_syscall_next_pc): Likewise. * arm-nbsd-nat.c (arm_supply_gregset): Likewise. (fetch_register): Likewise. (store_register): Likewise. * arm-tdep.c (arm_is_thumb): Likewise. (displaced_in_arm_mode): Likewise. (bx_write_pc): Likewise. (arm_get_next_pcs_addr_bits_remove): Likewise. (arm_software_single_step): Likewise. (arm_extract_return_value): Likewise. (arm_store_return_value): Likewise. (arm_write_pc): Likewise. * bfin-tdep.c (bfin_extract_return_value): Likewise. * bsd-uthread.c (bsd_uthread_fetch_registers): Likewise. (bsd_uthread_store_registers): Likewise. * core-regset.c (fetch_core_registers): Likewise. * corelow.c (get_core_registers): Likewise. * cris-tdep.c (cris_store_return_value): Likewise. (cris_extract_return_value): Likewise. (find_step_target): Likewise. (find_step_target): Likewise. (cris_software_single_step): Likewise. * ctf.c (ctf_fetch_registers): Likewise. * darwin-nat.c (cancel_breakpoint): Likewise. * fbsd-tdep.c (fbsd_collect_thread_registers): Likewise. * frv-tdep.c (frv_extract_return_value): Likewise. * ft32-tdep.c (ft32_store_return_value): Likewise. (ft32_extract_return_value): Likewise. * go32-nat.c (fetch_register): Likewise. (go32_fetch_registers): Likewise. (go32_store_registers): Likewise. (store_register): Likewise. * h8300-tdep.c (h8300_extract_return_value): Likewise. (h8300_store_return_value): Likewise. * hppa-linux-nat.c (fetch_register): Likewise. (store_register): Likewise. (hppa_linux_fetch_inferior_registers): Likewise. (hppa_linux_store_inferior_registers): Likewise. * i386-darwin-nat.c (i386_darwin_fetch_inferior_registers): Likewise. (i386_darwin_store_inferior_registers): Likewise. * i386-gnu-nat.c (gnu_fetch_registers): Likewise. (gnu_store_registers): Likewise. * i386-linux-nat.c (fetch_register): Likewise. (store_register): Likewise. (supply_gregset): Likewise. (fill_gregset): Likewise. (i386_linux_fetch_inferior_registers): Likewise. (i386_linux_store_inferior_registers): Likewise. (i386_linux_resume): Likewise. * i386-linux-tdep.c (i386_linux_get_syscall_number_from_regcache): Likewise. * i386-nto-tdep.c (i386nto_supply_gregset): Likewise. * i386-obsd-nat.c (i386obsd_supply_pcb): Likewise. * i386-obsd-tdep.c (i386obsd_supply_uthread): Likewise. (i386obsd_collect_uthread): Likewise. * i386-tdep.c (i386_mmx_regnum_to_fp_regnum): Likewise. (i386_supply_gregset): Likewise. (i386_collect_gregset): Likewise. (i386_supply_fpregset): Likewise. (i386_collect_fpregset): Likewise. (i386_mpx_bd_base): Likewise. * i386-v4-nat.c (supply_fpregset): Likewise. (fill_fpregset): Likewise. * i387-tdep.c (i387_supply_fsave): Likewise. (i387_collect_fsave): Likewise. (i387_supply_fxsave): Likewise. (i387_collect_fxsave): Likewise. (i387_supply_xsave): Likewise. (i387_collect_xsave): Likewise. * ia64-linux-nat.c (ia64_linux_fetch_registers): Likewise. (ia64_linux_store_registers): Likewise. * ia64-tdep.c (ia64_access_rse_reg): Likewise. (ia64_extract_return_value): Likewise. (ia64_store_return_value): Likewise. (find_func_descr): Likewise. * inf-child.c (inf_child_fetch_inferior_registers): Likewise. * inf-ptrace.c (inf_ptrace_fetch_registers): Likewise. (inf_ptrace_store_registers): Likewise. * infrun.c (use_displaced_stepping): Likewise. (displaced_step_prepare_throw): Likewise. (resume): Likewise. (proceed): Likewise. (do_target_wait): Likewise. (adjust_pc_after_break): Likewise. (handle_inferior_event_1): Likewise. (handle_signal_stop): Likewise. (save_infcall_suspend_state): Likewise. (restore_infcall_suspend_state): Likewise. * iq2000-tdep.c (iq2000_extract_return_value): Likewise. * jit.c (jit_frame_prev_register): Likewise. * linux-nat.c (save_stop_reason): Likewise. (linux_nat_wait_1): Likewise. (resume_stopped_resumed_lwps): Likewise. * linux-record.c (record_linux_sockaddr): Likewise. (record_linux_msghdr): Likewise. (record_linux_system_call): Likewise. * linux-tdep.c (linux_collect_thread_registers): Likewise. * lm32-tdep.c (lm32_extract_return_value): Likewise. (lm32_store_return_value): Likewise. * m32c-tdep.c (m32c_read_flg): Likewise. (m32c_pseudo_register_read): Likewise. (m32c_pseudo_register_write): Likewise. * m32r-linux-tdep.c (m32r_linux_supply_gregset): Likewise. (m32r_linux_collect_gregset): Likewise. * m32r-tdep.c (m32r_store_return_value): Likewise. (m32r_extract_return_value): Likewise. * m68k-bsd-nat.c (m68kbsd_supply_fpregset): Likewise. (m68kbsd_collect_fpregset): Likewise. * m68k-bsd-tdep.c (m68kbsd_supply_fpregset): Likewise. * m68k-linux-nat.c (fetch_register): Likewise. (old_fetch_inferior_registers): Likewise. (old_store_inferior_registers): Likewise. (store_regs): Likewise. * m68k-tdep.c (m68k_svr4_extract_return_value): Likewise. (m68k_svr4_store_return_value): Likewise. * m88k-tdep.c (m88k_store_arguments): Likewise. * mi/mi-main.c (mi_cmd_data_list_changed_registers): Likewise. (mi_cmd_data_write_register_values): Likewise. * mips-fbsd-nat.c (mips_fbsd_fetch_inferior_registers): Likewise. (mips_fbsd_store_inferior_registers): Likewise. * mips-fbsd-tdep.c (mips_fbsd_supply_fpregs): Likewise. (mips_fbsd_supply_gregs): Likewise. (mips_fbsd_collect_fpregs): Likewise. (mips_fbsd_collect_gregs): Likewise. (mips_fbsd_supply_fpregset): Likewise. (mips_fbsd_collect_fpregset): Likewise. (mips_fbsd_supply_gregset): Likewise. (mips_fbsd_collect_gregset): Likewise. * mips-linux-nat.c (supply_gregset): Likewise. (fill_gregset): Likewise. (supply_fpregset): Likewise. (fill_fpregset): Likewise. * mips-linux-tdep.c (mips_supply_gregset): Likewise. (mips_fill_gregset): Likewise. (mips_supply_fpregset): Likewise. (mips_fill_fpregset): Likewise. (mips64_supply_gregset): Likewise. (micromips_linux_sigframe_validate): Likewise. * mips-nbsd-nat.c (mipsnbsd_fetch_inferior_registers): Likewise. (mipsnbsd_fetch_inferior_registers): Likewise. (mipsnbsd_store_inferior_registers): Likewise. * mips-nbsd-tdep.c (mipsnbsd_supply_fpregset): Likewise. (mipsnbsd_supply_gregset): Likewise. (mipsnbsd_iterate_over_regset_sections): Likewise. (mipsnbsd_supply_reg): Likewise. (mipsnbsd_supply_fpreg): Likewise. * mips-tdep.c (mips_in_frame_stub): Likewise. (mips_dummy_id): Likewise. (is_octeon_bbit_op): Likewise. (micromips_bc1_pc): Likewise. (extended_mips16_next_pc): Likewise. (mips16_next_pc): Likewise. (deal_with_atomic_sequence): Likewise. * moxie-tdep.c (moxie_process_readu): Likewise. * nios2-tdep.c (nios2_get_next_pc): Likewise. * nto-procfs.c (procfs_store_registers): Likewise. * ppc-fbsd-nat.c (ppcfbsd_fetch_inferior_registers): Likewise. (ppcfbsd_store_inferior_registers): Likewise. * ppc-linux-nat.c (fetch_vsx_register): Likewise. (fetch_altivec_register): Likewise. (get_spe_registers): Likewise. (fetch_spe_register): Likewise. (fetch_altivec_registers): Likewise. (fetch_all_gp_regs): Likewise. (fetch_all_fp_regs): Likewise. (store_vsx_register): Likewise. (store_altivec_register): Likewise. (set_spe_registers): Likewise. (store_spe_register): Likewise. (store_altivec_registers): Likewise. (store_all_gp_regs): Likewise. (store_all_fp_regs): Likewise. * ppc-linux-tdep.c (ppc_linux_supply_gregset): Likewise. (ppc_linux_collect_gregset): Likewise. (ppc_canonicalize_syscall): Likewise. (ppc_linux_record_signal): Likewise. (ppu2spu_prev_register): Likewise. * ppc-nbsd-nat.c (ppcnbsd_supply_pcb): Likewise. * ppc-obsd-nat.c (ppcobsd_fetch_registers): Likewise. (ppcobsd_store_registers): Likewise. * ppc-ravenscar-thread.c (ppc_ravenscar_generic_fetch_registers): Likewise. (ppc_ravenscar_generic_store_registers): Likewise. * procfs.c (procfs_fetch_registers): Likewise. (procfs_store_registers): Likewise. * ravenscar-thread.c (ravenscar_fetch_registers): Likewise. (ravenscar_store_registers): Likewise. (ravenscar_prepare_to_store): Likewise. * record-btrace.c (record_btrace_fetch_registers): Likewise. * record-full.c (record_full_wait_1): Likewise. (record_full_registers_change): Likewise. (record_full_store_registers): Likewise. (record_full_core_fetch_registers): Likewise. (record_full_save): Likewise. (record_full_goto_insn): Likewise. * regcache.c (regcache_register_size): Likewise. (get_regcache_arch): Remove. (regcache_read_pc): Likewise. * regcache.h (get_regcache_arch): Remove. * remote-sim.c (gdbsim_fetch_register): Likewise. (gdbsim_store_register): Likewise. * remote.c (fetch_register_using_p): Likewise. (send_g_packet): Likewise. (remote_prepare_to_store): Likewise. (store_registers_using_G): Likewise. * reverse.c (save_bookmark_command): Likewise. (goto_bookmark_command): Likewise. * rs6000-aix-tdep.c (branch_dest): Likewise. * rs6000-nat.c (rs6000_ptrace64): Likewise. (fetch_register): Likewise. * rs6000-tdep.c (ppc_supply_reg): Likewise. (ppc_collect_reg): Likewise. (ppc_collect_gregset): Likewise. (ppc_collect_fpregset): Likewise. (ppc_collect_vsxregset): Likewise. (ppc_collect_vrregset): Likewise. (ppc_displaced_step_hw_singlestep): Likewise. (rs6000_pseudo_register_read): Likewise. (rs6000_pseudo_register_write): Likewise. * s390-linux-nat.c (supply_gregset): Likewise. (fill_gregset): Likewise. (s390_linux_fetch_inferior_registers): Likewise. * s390-linux-tdep.c (s390_write_pc): Likewise. (s390_software_single_step): Likewise. (s390_all_but_pc_registers_record): Likewise. (s390_linux_syscall_record): Likewise. * sentinel-frame.c (sentinel_frame_prev_arch): Likewise. * sh-nbsd-nat.c (shnbsd_fetch_inferior_registers): Likewise. (shnbsd_store_inferior_registers): Likewise. * sh-tdep.c (sh_extract_return_value_nofpu): Likewise. (sh_extract_return_value_fpu): Likewise. (sh_store_return_value_nofpu): Likewise. (sh_corefile_supply_regset): Likewise. (sh_corefile_collect_regset): Likewise. * sh64-tdep.c (sh64_extract_return_value): Likewise. (sh64_store_return_value): Likewise. * sparc-linux-tdep.c (sparc32_linux_collect_core_fpregset): Likewise. * sparc-nat.c (sparc_fetch_inferior_registers): Likewise. (sparc_store_inferior_registers): Likewise. * sparc-ravenscar-thread.c (register_in_thread_descriptor_p): Likewise. (sparc_ravenscar_prepare_to_store): Likewise. * sparc-tdep.c (sparc32_store_arguments): Likewise. (sparc_analyze_control_transfer): Likewise. (sparc_step_trap): Likewise. (sparc_software_single_step): Likewise. (sparc32_gdbarch_init): Likewise. (sparc_supply_rwindow): Likewise. (sparc_collect_rwindow): Likewise. * sparc64-linux-tdep.c (sparc64_linux_collect_core_fpregset): Likewise. * sparc64-nbsd-nat.c (sparc64nbsd_supply_gregset): Likewise. (sparc64nbsd_collect_gregset): Likewise. (sparc64nbsd_supply_fpregset): Likewise. (sparc64nbsd_collect_fpregset): Likewise. * sparc64-tdep.c (sparc64_store_arguments): Likewise. (sparc64_supply_gregset): Likewise. (sparc64_collect_gregset): Likewise. (sparc64_supply_fpregset): Likewise. (sparc64_collect_fpregset): Likewise. * spu-linux-nat.c (spu_fetch_inferior_registers): Likewise. * spu-tdep.c (spu_unwind_sp): Likewise. (spu2ppu_prev_register): Likewise. (spu_memory_remove_breakpoint): Likewise. * stack.c (return_command): Likewise. * tic6x-tdep.c (tic6x_extract_signed_field): Likewise. * tracefile-tfile.c (tfile_fetch_registers): Likewise. * tracefile.c (trace_save_ctf): Likewise. * windows-nat.c (do_windows_fetch_inferior_registers): Likewise. (do_windows_store_inferior_registers): Likewise. (windows_resume): Likewise. * xtensa-linux-nat.c (fill_gregset): Likewise. (supply_gregset_reg): Likewise. * xtensa-tdep.c (xtensa_register_write_masked): Likewise. (xtensa_register_read_masked): Likewise. (xtensa_supply_gregset): Likewise. (xtensa_extract_return_value): Likewise. (xtensa_store_return_value): Likewise.
2017-10-25 17:37:03 +02:00
struct gdbarch *gdbarch = regcache->arch ();
struct ravenscar_arch_ops *arch_ops
= gdbarch_ravenscar_ops (gdbarch);
arch_ops->to_store_registers (regcache, regnum);
}
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
else
beneath->to_store_registers (beneath, regcache, regnum);
}
static void
ravenscar_prepare_to_store (struct target_ops *self,
struct regcache *regcache)
{
struct target_ops *beneath = find_target_beneath (self);
Use ptid from regcache in almost all remaining nat files This patch contains almost all of the remaining changes needed to make to_fetch_registers/to_store_registers/to_prepare_to_store independent of inferior_ptid. It contains only some "trivial" changes, the more complicated ones are in separate patches. gdb/ChangeLog: * i386-linux-nat.c (fetch_register, store_register, i386_linux_fetch_inferior_registers, i386_linux_store_inferior_registers): Use ptid from regcache. * ia64-linux-nat.c (ia64_linux_fetch_register, ia64_linux_store_register): Likewise. * inf-ptrace.c (inf_ptrace_fetch_register, inf_ptrace_store_register): Likewise. * m32r-linux-nat.c (m32r_linux_fetch_inferior_registers, m32r_linux_store_inferior_registers): Likewise. * m68k-bsd-nat.c (m68kbsd_fetch_inferior_registers, m68kbsd_store_inferior_registers): Likewise. * m68k-linux-nat.c (fetch_register, store_register, m68k_linux_fetch_inferior_registers, m68k_linux_store_inferior_registers): Likewise. * m88k-bsd-nat.c (m88kbsd_fetch_inferior_registers, m88kbsd_store_inferior_registers): Likewise. * mips-fbsd-nat.c (mips_fbsd_fetch_inferior_registers, mips_fbsd_store_inferior_registers): Likewise. * mips-linux-nat.c (mips64_linux_regsets_fetch_registers, mips64_linux_regsets_store_registers): Likewise. * mips-nbsd-nat.c (mipsnbsd_fetch_inferior_registers, mipsnbsd_store_inferior_registers): Likewise. * mips-obsd-nat.c (mips64obsd_fetch_inferior_registers, mips64obsd_store_inferior_registers): Likewise. * nto-procfs.c (procfs_fetch_registers, procfs_store_registers): Likewise. * ppc-fbsd-nat.c (ppcfbsd_fetch_inferior_registers, ppcfbsd_store_inferior_registers): Likewise. * ppc-linux-nat.c (ppc_linux_fetch_inferior_registers, ppc_linux_store_inferior_registers): Likewise. * ppc-nbsd-nat.c (ppcnbsd_fetch_inferior_registers, ppcnbsd_store_inferior_registers): Likewise. * ppc-obsd-nat.c (ppcobsd_fetch_registers, ppcobsd_store_registers): Likewise. * procfs.c (procfs_fetch_registers, procfs_store_registers): Likewise. * ravenscar-thread.c (ravenscar_fetch_registers, ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. * record-btrace.c (record_btrace_fetch_registers, record_btrace_store_registers, record_btrace_prepare_to_store): Likewise. * remote-sim.c (gdbsim_fetch_register, gdbsim_store_register): Lookup inferior using ptid from regcache, instead of current_inferior. * remote.c (remote_fetch_registers, remote_store_registers): Use ptid from regcache. * rs6000-nat.c (fetch_register, store_register): Likewise. * s390-linux-nat.c (s390_linux_fetch_inferior_registers, s390_linux_store_inferior_registers): Likewise. * sh-nbsd-nat.c (shnbsd_fetch_inferior_registers, shnbsd_store_inferior_registers): Likewise. * sol-thread.c (sol_thread_fetch_registers, sol_thread_store_registers): Likewise. * sparc-nat.c (sparc_fetch_inferior_registers, sparc_store_inferior_registers): Likewise. * tilegx-linux-nat.c (fetch_inferior_registers, store_inferior_registers): Likewise. * vax-bsd-nat.c (vaxbsd_fetch_inferior_registers, vaxbsd_store_inferior_registers): Likewise. * xtensa-linux-nat.c (fetch_gregs, store_gregs, fetch_xtregs, store_xtregs): Likewise.
2017-03-20 22:37:36 +01:00
ptid_t ptid = regcache_get_ptid (regcache);
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
if (ravenscar_runtime_initialized ()
&& is_ravenscar_task (ptid)
&& !ravenscar_task_is_currently_active (ptid))
{
s/get_regcache_arch (regcache)/regcache->arch ()/g This patches removes get_regcache_arch, and use regache->arch () instead. The motivation of this change is that I am going to move some basic stuff into a base class of regcache. I don't need to update "client" code regcache->arch (). On the other hand, this patch shortens the code a little bit. gdb: 2017-10-25 Yao Qi <yao.qi@linaro.org> * aarch32-linux-nat.c (aarch32_gp_regcache_supply): Use regcache->arch () instead get_regcache_arch. * aarch64-fbsd-nat.c (aarch64_fbsd_fetch_inferior_registers): Likewise. (aarch64_fbsd_store_inferior_registers): Likewise. * aarch64-linux-nat.c (fetch_gregs_from_thread): Likewise. (store_gregs_to_thread): Likewise. (fetch_fpregs_from_thread): Likewise. (store_fpregs_to_thread): Likewise. * aarch64-tdep.c (aarch64_extract_return_value): Likewise. (aarch64_store_return_value): Likewise. (aarch64_software_single_step): Likewise. * aix-thread.c (aix_thread_wait): Likewise. (supply_reg32): Likewise. (supply_sprs64): Likewise. (supply_sprs32): Likewise. (fill_gprs64): Likewise. (fill_gprs32): Likewise. (fill_sprs64): Likewise. (fill_sprs32): Likewise. (store_regs_user_thread): Likewise. (store_regs_kernel_thread): Likewise. * alpha-bsd-nat.c (alphabsd_fetch_inferior_registers): Likewise. (alphabsd_store_inferior_registers): Likewise. * alpha-tdep.c (alpha_extract_return_value): Likewise. (alpha_store_return_value): Likewise. (alpha_deal_with_atomic_sequence): Likewise. (alpha_next_pc): Likewise. (alpha_software_single_step): Likewise. * amd64-bsd-nat.c (amd64bsd_fetch_inferior_registers): Likewise. (amd64bsd_store_inferior_registers): Likewise. * amd64-linux-nat.c (amd64_linux_fetch_inferior_registers): Likewise. (amd64_linux_store_inferior_registers): Likewise. * amd64-nat.c (amd64_supply_native_gregset): Likewise. (amd64_collect_native_gregset): Likewise. * amd64-obsd-tdep.c (amd64obsd_supply_uthread): Likewise. (amd64obsd_collect_uthread): Likewise. * amd64-tdep.c (amd64_supply_fpregset): Likewise. (amd64_collect_fpregset): Likewise. (amd64_supply_fxsave): Likewise. (amd64_supply_xsave): Likewise. (amd64_collect_fxsave): Likewise. (amd64_collect_xsave): Likewise. * arc-tdep.c (arc_write_pc): Likewise. * arch-utils.c (default_skip_permanent_breakpoint): Likewise. * arm-fbsd-nat.c (arm_fbsd_fetch_inferior_registers): Likewise. (arm_fbsd_store_inferior_registers): Likewise. * arm-linux-nat.c (fetch_vfp_regs): Likewise. (store_vfp_regs): Likewise. (arm_linux_fetch_inferior_registers): Likewise. (arm_linux_store_inferior_registers): Likewise. * arm-linux-tdep.c (arm_linux_supply_gregset): Likewise. (arm_linux_sigreturn_next_pc): Likewise. (arm_linux_get_next_pcs_syscall_next_pc): Likewise. * arm-nbsd-nat.c (arm_supply_gregset): Likewise. (fetch_register): Likewise. (store_register): Likewise. * arm-tdep.c (arm_is_thumb): Likewise. (displaced_in_arm_mode): Likewise. (bx_write_pc): Likewise. (arm_get_next_pcs_addr_bits_remove): Likewise. (arm_software_single_step): Likewise. (arm_extract_return_value): Likewise. (arm_store_return_value): Likewise. (arm_write_pc): Likewise. * bfin-tdep.c (bfin_extract_return_value): Likewise. * bsd-uthread.c (bsd_uthread_fetch_registers): Likewise. (bsd_uthread_store_registers): Likewise. * core-regset.c (fetch_core_registers): Likewise. * corelow.c (get_core_registers): Likewise. * cris-tdep.c (cris_store_return_value): Likewise. (cris_extract_return_value): Likewise. (find_step_target): Likewise. (find_step_target): Likewise. (cris_software_single_step): Likewise. * ctf.c (ctf_fetch_registers): Likewise. * darwin-nat.c (cancel_breakpoint): Likewise. * fbsd-tdep.c (fbsd_collect_thread_registers): Likewise. * frv-tdep.c (frv_extract_return_value): Likewise. * ft32-tdep.c (ft32_store_return_value): Likewise. (ft32_extract_return_value): Likewise. * go32-nat.c (fetch_register): Likewise. (go32_fetch_registers): Likewise. (go32_store_registers): Likewise. (store_register): Likewise. * h8300-tdep.c (h8300_extract_return_value): Likewise. (h8300_store_return_value): Likewise. * hppa-linux-nat.c (fetch_register): Likewise. (store_register): Likewise. (hppa_linux_fetch_inferior_registers): Likewise. (hppa_linux_store_inferior_registers): Likewise. * i386-darwin-nat.c (i386_darwin_fetch_inferior_registers): Likewise. (i386_darwin_store_inferior_registers): Likewise. * i386-gnu-nat.c (gnu_fetch_registers): Likewise. (gnu_store_registers): Likewise. * i386-linux-nat.c (fetch_register): Likewise. (store_register): Likewise. (supply_gregset): Likewise. (fill_gregset): Likewise. (i386_linux_fetch_inferior_registers): Likewise. (i386_linux_store_inferior_registers): Likewise. (i386_linux_resume): Likewise. * i386-linux-tdep.c (i386_linux_get_syscall_number_from_regcache): Likewise. * i386-nto-tdep.c (i386nto_supply_gregset): Likewise. * i386-obsd-nat.c (i386obsd_supply_pcb): Likewise. * i386-obsd-tdep.c (i386obsd_supply_uthread): Likewise. (i386obsd_collect_uthread): Likewise. * i386-tdep.c (i386_mmx_regnum_to_fp_regnum): Likewise. (i386_supply_gregset): Likewise. (i386_collect_gregset): Likewise. (i386_supply_fpregset): Likewise. (i386_collect_fpregset): Likewise. (i386_mpx_bd_base): Likewise. * i386-v4-nat.c (supply_fpregset): Likewise. (fill_fpregset): Likewise. * i387-tdep.c (i387_supply_fsave): Likewise. (i387_collect_fsave): Likewise. (i387_supply_fxsave): Likewise. (i387_collect_fxsave): Likewise. (i387_supply_xsave): Likewise. (i387_collect_xsave): Likewise. * ia64-linux-nat.c (ia64_linux_fetch_registers): Likewise. (ia64_linux_store_registers): Likewise. * ia64-tdep.c (ia64_access_rse_reg): Likewise. (ia64_extract_return_value): Likewise. (ia64_store_return_value): Likewise. (find_func_descr): Likewise. * inf-child.c (inf_child_fetch_inferior_registers): Likewise. * inf-ptrace.c (inf_ptrace_fetch_registers): Likewise. (inf_ptrace_store_registers): Likewise. * infrun.c (use_displaced_stepping): Likewise. (displaced_step_prepare_throw): Likewise. (resume): Likewise. (proceed): Likewise. (do_target_wait): Likewise. (adjust_pc_after_break): Likewise. (handle_inferior_event_1): Likewise. (handle_signal_stop): Likewise. (save_infcall_suspend_state): Likewise. (restore_infcall_suspend_state): Likewise. * iq2000-tdep.c (iq2000_extract_return_value): Likewise. * jit.c (jit_frame_prev_register): Likewise. * linux-nat.c (save_stop_reason): Likewise. (linux_nat_wait_1): Likewise. (resume_stopped_resumed_lwps): Likewise. * linux-record.c (record_linux_sockaddr): Likewise. (record_linux_msghdr): Likewise. (record_linux_system_call): Likewise. * linux-tdep.c (linux_collect_thread_registers): Likewise. * lm32-tdep.c (lm32_extract_return_value): Likewise. (lm32_store_return_value): Likewise. * m32c-tdep.c (m32c_read_flg): Likewise. (m32c_pseudo_register_read): Likewise. (m32c_pseudo_register_write): Likewise. * m32r-linux-tdep.c (m32r_linux_supply_gregset): Likewise. (m32r_linux_collect_gregset): Likewise. * m32r-tdep.c (m32r_store_return_value): Likewise. (m32r_extract_return_value): Likewise. * m68k-bsd-nat.c (m68kbsd_supply_fpregset): Likewise. (m68kbsd_collect_fpregset): Likewise. * m68k-bsd-tdep.c (m68kbsd_supply_fpregset): Likewise. * m68k-linux-nat.c (fetch_register): Likewise. (old_fetch_inferior_registers): Likewise. (old_store_inferior_registers): Likewise. (store_regs): Likewise. * m68k-tdep.c (m68k_svr4_extract_return_value): Likewise. (m68k_svr4_store_return_value): Likewise. * m88k-tdep.c (m88k_store_arguments): Likewise. * mi/mi-main.c (mi_cmd_data_list_changed_registers): Likewise. (mi_cmd_data_write_register_values): Likewise. * mips-fbsd-nat.c (mips_fbsd_fetch_inferior_registers): Likewise. (mips_fbsd_store_inferior_registers): Likewise. * mips-fbsd-tdep.c (mips_fbsd_supply_fpregs): Likewise. (mips_fbsd_supply_gregs): Likewise. (mips_fbsd_collect_fpregs): Likewise. (mips_fbsd_collect_gregs): Likewise. (mips_fbsd_supply_fpregset): Likewise. (mips_fbsd_collect_fpregset): Likewise. (mips_fbsd_supply_gregset): Likewise. (mips_fbsd_collect_gregset): Likewise. * mips-linux-nat.c (supply_gregset): Likewise. (fill_gregset): Likewise. (supply_fpregset): Likewise. (fill_fpregset): Likewise. * mips-linux-tdep.c (mips_supply_gregset): Likewise. (mips_fill_gregset): Likewise. (mips_supply_fpregset): Likewise. (mips_fill_fpregset): Likewise. (mips64_supply_gregset): Likewise. (micromips_linux_sigframe_validate): Likewise. * mips-nbsd-nat.c (mipsnbsd_fetch_inferior_registers): Likewise. (mipsnbsd_fetch_inferior_registers): Likewise. (mipsnbsd_store_inferior_registers): Likewise. * mips-nbsd-tdep.c (mipsnbsd_supply_fpregset): Likewise. (mipsnbsd_supply_gregset): Likewise. (mipsnbsd_iterate_over_regset_sections): Likewise. (mipsnbsd_supply_reg): Likewise. (mipsnbsd_supply_fpreg): Likewise. * mips-tdep.c (mips_in_frame_stub): Likewise. (mips_dummy_id): Likewise. (is_octeon_bbit_op): Likewise. (micromips_bc1_pc): Likewise. (extended_mips16_next_pc): Likewise. (mips16_next_pc): Likewise. (deal_with_atomic_sequence): Likewise. * moxie-tdep.c (moxie_process_readu): Likewise. * nios2-tdep.c (nios2_get_next_pc): Likewise. * nto-procfs.c (procfs_store_registers): Likewise. * ppc-fbsd-nat.c (ppcfbsd_fetch_inferior_registers): Likewise. (ppcfbsd_store_inferior_registers): Likewise. * ppc-linux-nat.c (fetch_vsx_register): Likewise. (fetch_altivec_register): Likewise. (get_spe_registers): Likewise. (fetch_spe_register): Likewise. (fetch_altivec_registers): Likewise. (fetch_all_gp_regs): Likewise. (fetch_all_fp_regs): Likewise. (store_vsx_register): Likewise. (store_altivec_register): Likewise. (set_spe_registers): Likewise. (store_spe_register): Likewise. (store_altivec_registers): Likewise. (store_all_gp_regs): Likewise. (store_all_fp_regs): Likewise. * ppc-linux-tdep.c (ppc_linux_supply_gregset): Likewise. (ppc_linux_collect_gregset): Likewise. (ppc_canonicalize_syscall): Likewise. (ppc_linux_record_signal): Likewise. (ppu2spu_prev_register): Likewise. * ppc-nbsd-nat.c (ppcnbsd_supply_pcb): Likewise. * ppc-obsd-nat.c (ppcobsd_fetch_registers): Likewise. (ppcobsd_store_registers): Likewise. * ppc-ravenscar-thread.c (ppc_ravenscar_generic_fetch_registers): Likewise. (ppc_ravenscar_generic_store_registers): Likewise. * procfs.c (procfs_fetch_registers): Likewise. (procfs_store_registers): Likewise. * ravenscar-thread.c (ravenscar_fetch_registers): Likewise. (ravenscar_store_registers): Likewise. (ravenscar_prepare_to_store): Likewise. * record-btrace.c (record_btrace_fetch_registers): Likewise. * record-full.c (record_full_wait_1): Likewise. (record_full_registers_change): Likewise. (record_full_store_registers): Likewise. (record_full_core_fetch_registers): Likewise. (record_full_save): Likewise. (record_full_goto_insn): Likewise. * regcache.c (regcache_register_size): Likewise. (get_regcache_arch): Remove. (regcache_read_pc): Likewise. * regcache.h (get_regcache_arch): Remove. * remote-sim.c (gdbsim_fetch_register): Likewise. (gdbsim_store_register): Likewise. * remote.c (fetch_register_using_p): Likewise. (send_g_packet): Likewise. (remote_prepare_to_store): Likewise. (store_registers_using_G): Likewise. * reverse.c (save_bookmark_command): Likewise. (goto_bookmark_command): Likewise. * rs6000-aix-tdep.c (branch_dest): Likewise. * rs6000-nat.c (rs6000_ptrace64): Likewise. (fetch_register): Likewise. * rs6000-tdep.c (ppc_supply_reg): Likewise. (ppc_collect_reg): Likewise. (ppc_collect_gregset): Likewise. (ppc_collect_fpregset): Likewise. (ppc_collect_vsxregset): Likewise. (ppc_collect_vrregset): Likewise. (ppc_displaced_step_hw_singlestep): Likewise. (rs6000_pseudo_register_read): Likewise. (rs6000_pseudo_register_write): Likewise. * s390-linux-nat.c (supply_gregset): Likewise. (fill_gregset): Likewise. (s390_linux_fetch_inferior_registers): Likewise. * s390-linux-tdep.c (s390_write_pc): Likewise. (s390_software_single_step): Likewise. (s390_all_but_pc_registers_record): Likewise. (s390_linux_syscall_record): Likewise. * sentinel-frame.c (sentinel_frame_prev_arch): Likewise. * sh-nbsd-nat.c (shnbsd_fetch_inferior_registers): Likewise. (shnbsd_store_inferior_registers): Likewise. * sh-tdep.c (sh_extract_return_value_nofpu): Likewise. (sh_extract_return_value_fpu): Likewise. (sh_store_return_value_nofpu): Likewise. (sh_corefile_supply_regset): Likewise. (sh_corefile_collect_regset): Likewise. * sh64-tdep.c (sh64_extract_return_value): Likewise. (sh64_store_return_value): Likewise. * sparc-linux-tdep.c (sparc32_linux_collect_core_fpregset): Likewise. * sparc-nat.c (sparc_fetch_inferior_registers): Likewise. (sparc_store_inferior_registers): Likewise. * sparc-ravenscar-thread.c (register_in_thread_descriptor_p): Likewise. (sparc_ravenscar_prepare_to_store): Likewise. * sparc-tdep.c (sparc32_store_arguments): Likewise. (sparc_analyze_control_transfer): Likewise. (sparc_step_trap): Likewise. (sparc_software_single_step): Likewise. (sparc32_gdbarch_init): Likewise. (sparc_supply_rwindow): Likewise. (sparc_collect_rwindow): Likewise. * sparc64-linux-tdep.c (sparc64_linux_collect_core_fpregset): Likewise. * sparc64-nbsd-nat.c (sparc64nbsd_supply_gregset): Likewise. (sparc64nbsd_collect_gregset): Likewise. (sparc64nbsd_supply_fpregset): Likewise. (sparc64nbsd_collect_fpregset): Likewise. * sparc64-tdep.c (sparc64_store_arguments): Likewise. (sparc64_supply_gregset): Likewise. (sparc64_collect_gregset): Likewise. (sparc64_supply_fpregset): Likewise. (sparc64_collect_fpregset): Likewise. * spu-linux-nat.c (spu_fetch_inferior_registers): Likewise. * spu-tdep.c (spu_unwind_sp): Likewise. (spu2ppu_prev_register): Likewise. (spu_memory_remove_breakpoint): Likewise. * stack.c (return_command): Likewise. * tic6x-tdep.c (tic6x_extract_signed_field): Likewise. * tracefile-tfile.c (tfile_fetch_registers): Likewise. * tracefile.c (trace_save_ctf): Likewise. * windows-nat.c (do_windows_fetch_inferior_registers): Likewise. (do_windows_store_inferior_registers): Likewise. (windows_resume): Likewise. * xtensa-linux-nat.c (fill_gregset): Likewise. (supply_gregset_reg): Likewise. * xtensa-tdep.c (xtensa_register_write_masked): Likewise. (xtensa_register_read_masked): Likewise. (xtensa_supply_gregset): Likewise. (xtensa_extract_return_value): Likewise. (xtensa_store_return_value): Likewise.
2017-10-25 17:37:03 +02:00
struct gdbarch *gdbarch = regcache->arch ();
struct ravenscar_arch_ops *arch_ops
= gdbarch_ravenscar_ops (gdbarch);
arch_ops->to_prepare_to_store (regcache);
}
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
else
beneath->to_prepare_to_store (beneath, regcache);
}
watchpoint regression debugging with remote protocol (bare metal) We have noticed a regression in our watchpoint support when debugging through the remote protocol a program running on a bare metal platform, when the program uses what we call the Ravenscar Runtime. This runtime is a subset of the Ada runtime defined by the Ravenscar Profile. One of the nice things about this runtime is that it provides tasking, which is equivalent to the concept of threads in C (it is actually often mapped to threads, when available). For bare metal targets, however, there is no OS, and therefore no thread layer. What we did, then, was add a ravenscar-thread layer, which has insider knowledge of the runtime to get the list of threads, but also all necessary info to perform thread switching. For the record, the commit which caused the regression is: commit 799a2abe613be0645b84f5aaa050f2f91e6ae3f7 Date: Mon Nov 30 16:05:16 2015 +0000 Subject: remote: stop reason and watchpoint data address per thread Running local-watch-wrong-thread.exp with "maint set target-non-stop on" exposes that gdb/remote.c only records whether the target stopped for a breakpoint/watchpoint plus the watchpoint data address *for the last reported remote event*. But in non-stop mode, we need to keep that info per-thread, as each thread can end up with its own last-status pending. Our testcase is very simple. We have a package defining a global variable named "Watch"... package Pck is Watch : Integer := 1974; end Pck; ... and a main subprogram which changes its value procedure Foo is begin Pck.Watch := Pck.Watch + 1; end Foo; To reproduce, we built our program as usual, started it in QEMU, and then connected GDB to QEMU... (gdb) target remote :4444 (gdb) break _ada_foo (gdb) cont <--- this is to make sure the program is started and the variable we want to watch is initialized ... at which point we try to use a watchpoint on our global variable: (gdb) watch watch ... but, upon resuming the execution with a "cont", we expected to get a watchpoint-hit notification, such as... (gdb) cont Hardware watchpoint 2: watch Old value = 1974 New value = 1975 0xfff00258 in foo () at /[...]/foo.adb:6 6 end Foo; ... but unfortunately, we get a SIGTRAP instead: (gdb) cont Program received signal SIGTRAP, Trace/breakpoint trap. foo () at /[...]/foo.adb:6 6 end Foo; What happens is that, on the one hand, the change in remote.c now stores the watchpoint-hit notification info in the thread that received it; and on the other hand, we have a ravenscar-thread layer which manages the thread list on top of the remote protocol layer. The two of them get disconnected, and this eventually results in GDB not realizing that we hit a watchpoint. Below is how: First, once connected and just before inserting our watchpoint, we have the ravenscar-thread layer which built the list of threads by extracting some info from inferior memory, giving us the following two threads: (gdb) info threads Id Target Id Frame 1 Thread 0 "0Q@" (Ravenscar task) foo () at /[...]/foo.adb:5 * 2 Thread 0x24618 (Ravenscar task) foo () at /[...]/foo.adb:5 The first thread is the only thread QEMU told GDB about. The second one is a thread that the ravenscar-thread added. QEMU has now way to know about those threads, since they are really embedded inside the program; that's why we have the ravenscar layer, which uses inside-knowledge to extract the list of threads. Next, we insert a watchpoint, which applies to all threads. No problem so far. Then, we continue; meaning that GDB sends a Z2 packet to QEMU to get the watchpoint inserted, then a vCont to resume the program's execution. The program hits the watchpoints, and thererfore QEMU reports it back: Packet received: T05thread:01;watch:000022c4; Since QEMU knows about one thread and one thread only, it stands to reason that it would say that the event applies to thread:01, which is our first thread in the "info threads" listing. That thread has a ptid of {42000, lwp=1, tid=0}. This is where Pedro's change kicks in: Seeing this event, and having determined that the event was reported for thread 01, and therefore ptid {42000, lwp=1, tid=0}, it saves the watchpoint-hit event info in the private area of that thread/ptid. Once this is done, remote.c's event-wait layer returns. Enter the ravenscar-thread layer of the event-wait, which does a little dance to delegate the wait to underlying layers with ptids that those layers know about, and then when the target_beneath's to_wait is done, tries to figure out which thread is now the active thread. The code looks like this: 1. inferior_ptid = base_ptid; 2. beneath->to_wait (beneath, base_ptid, status, 0); 3. [...] 4. ravenscar_update_inferior_ptid (); 5. 6. return inferior_ptid; Line 1 is where we reset inferior_ptid to the ptid that the target_beneath layer knows about, allowing us to then call its to_wait implementation (line 2). And then, upon return, we call ravenscar_update_inferior_ptid, which reads inferior memory to determine which thread is actually active, setting inferior_ptid accordingly. Then we return that inferior_ptid (which, again, neither QEMU and therefore nor the remote.c layer knows about). Upon return, we eventually arrive to the part where we try to handle the inferior event: we discover that we got a SIGTRAP and, as part of its handling, we call watchpoints_triggered, which calls target_stopped_by_watchpoint, which eventually remote_stopped_by_watchpoint, where Pedro's change kicks in again: struct thread_info *thread = inferior_thread (); return (thread->priv != NULL && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT); Because the ravenscar-thread layer changed the inferior_ptid to the ptid of the active thread, inferior_thread now returns the private data of that thread. This is not the thread that QEMU reported the watchpoint-hit on, and thus, the function returns "no watchpoint hit, mister". Hence GDB not understanding the SIGTRAP, thus reporting it verbatim. The way we chose to fix the issue is by making sure that the ravenscar-thread layer doesn't let the remote layer be called with inferior_ptid being set to a thread that the remote layer does not know about. gdb/ChangeLog: * ravenscar-thread.c (ravenscar_stopped_by_sw_breakpoint) (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): New functions. (init_ravenscar_thread_ops): Set the to_stopped_by_sw_breakpoint, to_stopped_by_hw_breakpoint, to_stopped_by_watchpoint, to_stopped_data_address and to_core_of_thread fields of ravenscar_ops.
2017-11-21 22:42:48 +01:00
/* Implement the to_stopped_by_sw_breakpoint target_ops "method". */
static int
ravenscar_stopped_by_sw_breakpoint (struct target_ops *ops)
{
ptid_t saved_ptid = inferior_ptid;
struct target_ops *beneath = find_target_beneath (ops);
int result;
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
inferior_ptid = get_base_thread_from_ravenscar_task (saved_ptid);
watchpoint regression debugging with remote protocol (bare metal) We have noticed a regression in our watchpoint support when debugging through the remote protocol a program running on a bare metal platform, when the program uses what we call the Ravenscar Runtime. This runtime is a subset of the Ada runtime defined by the Ravenscar Profile. One of the nice things about this runtime is that it provides tasking, which is equivalent to the concept of threads in C (it is actually often mapped to threads, when available). For bare metal targets, however, there is no OS, and therefore no thread layer. What we did, then, was add a ravenscar-thread layer, which has insider knowledge of the runtime to get the list of threads, but also all necessary info to perform thread switching. For the record, the commit which caused the regression is: commit 799a2abe613be0645b84f5aaa050f2f91e6ae3f7 Date: Mon Nov 30 16:05:16 2015 +0000 Subject: remote: stop reason and watchpoint data address per thread Running local-watch-wrong-thread.exp with "maint set target-non-stop on" exposes that gdb/remote.c only records whether the target stopped for a breakpoint/watchpoint plus the watchpoint data address *for the last reported remote event*. But in non-stop mode, we need to keep that info per-thread, as each thread can end up with its own last-status pending. Our testcase is very simple. We have a package defining a global variable named "Watch"... package Pck is Watch : Integer := 1974; end Pck; ... and a main subprogram which changes its value procedure Foo is begin Pck.Watch := Pck.Watch + 1; end Foo; To reproduce, we built our program as usual, started it in QEMU, and then connected GDB to QEMU... (gdb) target remote :4444 (gdb) break _ada_foo (gdb) cont <--- this is to make sure the program is started and the variable we want to watch is initialized ... at which point we try to use a watchpoint on our global variable: (gdb) watch watch ... but, upon resuming the execution with a "cont", we expected to get a watchpoint-hit notification, such as... (gdb) cont Hardware watchpoint 2: watch Old value = 1974 New value = 1975 0xfff00258 in foo () at /[...]/foo.adb:6 6 end Foo; ... but unfortunately, we get a SIGTRAP instead: (gdb) cont Program received signal SIGTRAP, Trace/breakpoint trap. foo () at /[...]/foo.adb:6 6 end Foo; What happens is that, on the one hand, the change in remote.c now stores the watchpoint-hit notification info in the thread that received it; and on the other hand, we have a ravenscar-thread layer which manages the thread list on top of the remote protocol layer. The two of them get disconnected, and this eventually results in GDB not realizing that we hit a watchpoint. Below is how: First, once connected and just before inserting our watchpoint, we have the ravenscar-thread layer which built the list of threads by extracting some info from inferior memory, giving us the following two threads: (gdb) info threads Id Target Id Frame 1 Thread 0 "0Q@" (Ravenscar task) foo () at /[...]/foo.adb:5 * 2 Thread 0x24618 (Ravenscar task) foo () at /[...]/foo.adb:5 The first thread is the only thread QEMU told GDB about. The second one is a thread that the ravenscar-thread added. QEMU has now way to know about those threads, since they are really embedded inside the program; that's why we have the ravenscar layer, which uses inside-knowledge to extract the list of threads. Next, we insert a watchpoint, which applies to all threads. No problem so far. Then, we continue; meaning that GDB sends a Z2 packet to QEMU to get the watchpoint inserted, then a vCont to resume the program's execution. The program hits the watchpoints, and thererfore QEMU reports it back: Packet received: T05thread:01;watch:000022c4; Since QEMU knows about one thread and one thread only, it stands to reason that it would say that the event applies to thread:01, which is our first thread in the "info threads" listing. That thread has a ptid of {42000, lwp=1, tid=0}. This is where Pedro's change kicks in: Seeing this event, and having determined that the event was reported for thread 01, and therefore ptid {42000, lwp=1, tid=0}, it saves the watchpoint-hit event info in the private area of that thread/ptid. Once this is done, remote.c's event-wait layer returns. Enter the ravenscar-thread layer of the event-wait, which does a little dance to delegate the wait to underlying layers with ptids that those layers know about, and then when the target_beneath's to_wait is done, tries to figure out which thread is now the active thread. The code looks like this: 1. inferior_ptid = base_ptid; 2. beneath->to_wait (beneath, base_ptid, status, 0); 3. [...] 4. ravenscar_update_inferior_ptid (); 5. 6. return inferior_ptid; Line 1 is where we reset inferior_ptid to the ptid that the target_beneath layer knows about, allowing us to then call its to_wait implementation (line 2). And then, upon return, we call ravenscar_update_inferior_ptid, which reads inferior memory to determine which thread is actually active, setting inferior_ptid accordingly. Then we return that inferior_ptid (which, again, neither QEMU and therefore nor the remote.c layer knows about). Upon return, we eventually arrive to the part where we try to handle the inferior event: we discover that we got a SIGTRAP and, as part of its handling, we call watchpoints_triggered, which calls target_stopped_by_watchpoint, which eventually remote_stopped_by_watchpoint, where Pedro's change kicks in again: struct thread_info *thread = inferior_thread (); return (thread->priv != NULL && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT); Because the ravenscar-thread layer changed the inferior_ptid to the ptid of the active thread, inferior_thread now returns the private data of that thread. This is not the thread that QEMU reported the watchpoint-hit on, and thus, the function returns "no watchpoint hit, mister". Hence GDB not understanding the SIGTRAP, thus reporting it verbatim. The way we chose to fix the issue is by making sure that the ravenscar-thread layer doesn't let the remote layer be called with inferior_ptid being set to a thread that the remote layer does not know about. gdb/ChangeLog: * ravenscar-thread.c (ravenscar_stopped_by_sw_breakpoint) (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): New functions. (init_ravenscar_thread_ops): Set the to_stopped_by_sw_breakpoint, to_stopped_by_hw_breakpoint, to_stopped_by_watchpoint, to_stopped_data_address and to_core_of_thread fields of ravenscar_ops.
2017-11-21 22:42:48 +01:00
result = beneath->to_stopped_by_sw_breakpoint (beneath);
inferior_ptid = saved_ptid;
return result;
}
/* Implement the to_stopped_by_hw_breakpoint target_ops "method". */
static int
ravenscar_stopped_by_hw_breakpoint (struct target_ops *ops)
{
ptid_t saved_ptid = inferior_ptid;
struct target_ops *beneath = find_target_beneath (ops);
int result;
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
inferior_ptid = get_base_thread_from_ravenscar_task (saved_ptid);
watchpoint regression debugging with remote protocol (bare metal) We have noticed a regression in our watchpoint support when debugging through the remote protocol a program running on a bare metal platform, when the program uses what we call the Ravenscar Runtime. This runtime is a subset of the Ada runtime defined by the Ravenscar Profile. One of the nice things about this runtime is that it provides tasking, which is equivalent to the concept of threads in C (it is actually often mapped to threads, when available). For bare metal targets, however, there is no OS, and therefore no thread layer. What we did, then, was add a ravenscar-thread layer, which has insider knowledge of the runtime to get the list of threads, but also all necessary info to perform thread switching. For the record, the commit which caused the regression is: commit 799a2abe613be0645b84f5aaa050f2f91e6ae3f7 Date: Mon Nov 30 16:05:16 2015 +0000 Subject: remote: stop reason and watchpoint data address per thread Running local-watch-wrong-thread.exp with "maint set target-non-stop on" exposes that gdb/remote.c only records whether the target stopped for a breakpoint/watchpoint plus the watchpoint data address *for the last reported remote event*. But in non-stop mode, we need to keep that info per-thread, as each thread can end up with its own last-status pending. Our testcase is very simple. We have a package defining a global variable named "Watch"... package Pck is Watch : Integer := 1974; end Pck; ... and a main subprogram which changes its value procedure Foo is begin Pck.Watch := Pck.Watch + 1; end Foo; To reproduce, we built our program as usual, started it in QEMU, and then connected GDB to QEMU... (gdb) target remote :4444 (gdb) break _ada_foo (gdb) cont <--- this is to make sure the program is started and the variable we want to watch is initialized ... at which point we try to use a watchpoint on our global variable: (gdb) watch watch ... but, upon resuming the execution with a "cont", we expected to get a watchpoint-hit notification, such as... (gdb) cont Hardware watchpoint 2: watch Old value = 1974 New value = 1975 0xfff00258 in foo () at /[...]/foo.adb:6 6 end Foo; ... but unfortunately, we get a SIGTRAP instead: (gdb) cont Program received signal SIGTRAP, Trace/breakpoint trap. foo () at /[...]/foo.adb:6 6 end Foo; What happens is that, on the one hand, the change in remote.c now stores the watchpoint-hit notification info in the thread that received it; and on the other hand, we have a ravenscar-thread layer which manages the thread list on top of the remote protocol layer. The two of them get disconnected, and this eventually results in GDB not realizing that we hit a watchpoint. Below is how: First, once connected and just before inserting our watchpoint, we have the ravenscar-thread layer which built the list of threads by extracting some info from inferior memory, giving us the following two threads: (gdb) info threads Id Target Id Frame 1 Thread 0 "0Q@" (Ravenscar task) foo () at /[...]/foo.adb:5 * 2 Thread 0x24618 (Ravenscar task) foo () at /[...]/foo.adb:5 The first thread is the only thread QEMU told GDB about. The second one is a thread that the ravenscar-thread added. QEMU has now way to know about those threads, since they are really embedded inside the program; that's why we have the ravenscar layer, which uses inside-knowledge to extract the list of threads. Next, we insert a watchpoint, which applies to all threads. No problem so far. Then, we continue; meaning that GDB sends a Z2 packet to QEMU to get the watchpoint inserted, then a vCont to resume the program's execution. The program hits the watchpoints, and thererfore QEMU reports it back: Packet received: T05thread:01;watch:000022c4; Since QEMU knows about one thread and one thread only, it stands to reason that it would say that the event applies to thread:01, which is our first thread in the "info threads" listing. That thread has a ptid of {42000, lwp=1, tid=0}. This is where Pedro's change kicks in: Seeing this event, and having determined that the event was reported for thread 01, and therefore ptid {42000, lwp=1, tid=0}, it saves the watchpoint-hit event info in the private area of that thread/ptid. Once this is done, remote.c's event-wait layer returns. Enter the ravenscar-thread layer of the event-wait, which does a little dance to delegate the wait to underlying layers with ptids that those layers know about, and then when the target_beneath's to_wait is done, tries to figure out which thread is now the active thread. The code looks like this: 1. inferior_ptid = base_ptid; 2. beneath->to_wait (beneath, base_ptid, status, 0); 3. [...] 4. ravenscar_update_inferior_ptid (); 5. 6. return inferior_ptid; Line 1 is where we reset inferior_ptid to the ptid that the target_beneath layer knows about, allowing us to then call its to_wait implementation (line 2). And then, upon return, we call ravenscar_update_inferior_ptid, which reads inferior memory to determine which thread is actually active, setting inferior_ptid accordingly. Then we return that inferior_ptid (which, again, neither QEMU and therefore nor the remote.c layer knows about). Upon return, we eventually arrive to the part where we try to handle the inferior event: we discover that we got a SIGTRAP and, as part of its handling, we call watchpoints_triggered, which calls target_stopped_by_watchpoint, which eventually remote_stopped_by_watchpoint, where Pedro's change kicks in again: struct thread_info *thread = inferior_thread (); return (thread->priv != NULL && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT); Because the ravenscar-thread layer changed the inferior_ptid to the ptid of the active thread, inferior_thread now returns the private data of that thread. This is not the thread that QEMU reported the watchpoint-hit on, and thus, the function returns "no watchpoint hit, mister". Hence GDB not understanding the SIGTRAP, thus reporting it verbatim. The way we chose to fix the issue is by making sure that the ravenscar-thread layer doesn't let the remote layer be called with inferior_ptid being set to a thread that the remote layer does not know about. gdb/ChangeLog: * ravenscar-thread.c (ravenscar_stopped_by_sw_breakpoint) (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): New functions. (init_ravenscar_thread_ops): Set the to_stopped_by_sw_breakpoint, to_stopped_by_hw_breakpoint, to_stopped_by_watchpoint, to_stopped_data_address and to_core_of_thread fields of ravenscar_ops.
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result = beneath->to_stopped_by_hw_breakpoint (beneath);
inferior_ptid = saved_ptid;
return result;
}
/* Implement the to_stopped_by_watchpoint target_ops "method". */
static int
ravenscar_stopped_by_watchpoint (struct target_ops *ops)
{
ptid_t saved_ptid = inferior_ptid;
struct target_ops *beneath = find_target_beneath (ops);
int result;
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
inferior_ptid = get_base_thread_from_ravenscar_task (saved_ptid);
watchpoint regression debugging with remote protocol (bare metal) We have noticed a regression in our watchpoint support when debugging through the remote protocol a program running on a bare metal platform, when the program uses what we call the Ravenscar Runtime. This runtime is a subset of the Ada runtime defined by the Ravenscar Profile. One of the nice things about this runtime is that it provides tasking, which is equivalent to the concept of threads in C (it is actually often mapped to threads, when available). For bare metal targets, however, there is no OS, and therefore no thread layer. What we did, then, was add a ravenscar-thread layer, which has insider knowledge of the runtime to get the list of threads, but also all necessary info to perform thread switching. For the record, the commit which caused the regression is: commit 799a2abe613be0645b84f5aaa050f2f91e6ae3f7 Date: Mon Nov 30 16:05:16 2015 +0000 Subject: remote: stop reason and watchpoint data address per thread Running local-watch-wrong-thread.exp with "maint set target-non-stop on" exposes that gdb/remote.c only records whether the target stopped for a breakpoint/watchpoint plus the watchpoint data address *for the last reported remote event*. But in non-stop mode, we need to keep that info per-thread, as each thread can end up with its own last-status pending. Our testcase is very simple. We have a package defining a global variable named "Watch"... package Pck is Watch : Integer := 1974; end Pck; ... and a main subprogram which changes its value procedure Foo is begin Pck.Watch := Pck.Watch + 1; end Foo; To reproduce, we built our program as usual, started it in QEMU, and then connected GDB to QEMU... (gdb) target remote :4444 (gdb) break _ada_foo (gdb) cont <--- this is to make sure the program is started and the variable we want to watch is initialized ... at which point we try to use a watchpoint on our global variable: (gdb) watch watch ... but, upon resuming the execution with a "cont", we expected to get a watchpoint-hit notification, such as... (gdb) cont Hardware watchpoint 2: watch Old value = 1974 New value = 1975 0xfff00258 in foo () at /[...]/foo.adb:6 6 end Foo; ... but unfortunately, we get a SIGTRAP instead: (gdb) cont Program received signal SIGTRAP, Trace/breakpoint trap. foo () at /[...]/foo.adb:6 6 end Foo; What happens is that, on the one hand, the change in remote.c now stores the watchpoint-hit notification info in the thread that received it; and on the other hand, we have a ravenscar-thread layer which manages the thread list on top of the remote protocol layer. The two of them get disconnected, and this eventually results in GDB not realizing that we hit a watchpoint. Below is how: First, once connected and just before inserting our watchpoint, we have the ravenscar-thread layer which built the list of threads by extracting some info from inferior memory, giving us the following two threads: (gdb) info threads Id Target Id Frame 1 Thread 0 "0Q@" (Ravenscar task) foo () at /[...]/foo.adb:5 * 2 Thread 0x24618 (Ravenscar task) foo () at /[...]/foo.adb:5 The first thread is the only thread QEMU told GDB about. The second one is a thread that the ravenscar-thread added. QEMU has now way to know about those threads, since they are really embedded inside the program; that's why we have the ravenscar layer, which uses inside-knowledge to extract the list of threads. Next, we insert a watchpoint, which applies to all threads. No problem so far. Then, we continue; meaning that GDB sends a Z2 packet to QEMU to get the watchpoint inserted, then a vCont to resume the program's execution. The program hits the watchpoints, and thererfore QEMU reports it back: Packet received: T05thread:01;watch:000022c4; Since QEMU knows about one thread and one thread only, it stands to reason that it would say that the event applies to thread:01, which is our first thread in the "info threads" listing. That thread has a ptid of {42000, lwp=1, tid=0}. This is where Pedro's change kicks in: Seeing this event, and having determined that the event was reported for thread 01, and therefore ptid {42000, lwp=1, tid=0}, it saves the watchpoint-hit event info in the private area of that thread/ptid. Once this is done, remote.c's event-wait layer returns. Enter the ravenscar-thread layer of the event-wait, which does a little dance to delegate the wait to underlying layers with ptids that those layers know about, and then when the target_beneath's to_wait is done, tries to figure out which thread is now the active thread. The code looks like this: 1. inferior_ptid = base_ptid; 2. beneath->to_wait (beneath, base_ptid, status, 0); 3. [...] 4. ravenscar_update_inferior_ptid (); 5. 6. return inferior_ptid; Line 1 is where we reset inferior_ptid to the ptid that the target_beneath layer knows about, allowing us to then call its to_wait implementation (line 2). And then, upon return, we call ravenscar_update_inferior_ptid, which reads inferior memory to determine which thread is actually active, setting inferior_ptid accordingly. Then we return that inferior_ptid (which, again, neither QEMU and therefore nor the remote.c layer knows about). Upon return, we eventually arrive to the part where we try to handle the inferior event: we discover that we got a SIGTRAP and, as part of its handling, we call watchpoints_triggered, which calls target_stopped_by_watchpoint, which eventually remote_stopped_by_watchpoint, where Pedro's change kicks in again: struct thread_info *thread = inferior_thread (); return (thread->priv != NULL && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT); Because the ravenscar-thread layer changed the inferior_ptid to the ptid of the active thread, inferior_thread now returns the private data of that thread. This is not the thread that QEMU reported the watchpoint-hit on, and thus, the function returns "no watchpoint hit, mister". Hence GDB not understanding the SIGTRAP, thus reporting it verbatim. The way we chose to fix the issue is by making sure that the ravenscar-thread layer doesn't let the remote layer be called with inferior_ptid being set to a thread that the remote layer does not know about. gdb/ChangeLog: * ravenscar-thread.c (ravenscar_stopped_by_sw_breakpoint) (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): New functions. (init_ravenscar_thread_ops): Set the to_stopped_by_sw_breakpoint, to_stopped_by_hw_breakpoint, to_stopped_by_watchpoint, to_stopped_data_address and to_core_of_thread fields of ravenscar_ops.
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result = beneath->to_stopped_by_watchpoint (beneath);
inferior_ptid = saved_ptid;
return result;
}
/* Implement the to_stopped_data_address target_ops "method". */
static int
ravenscar_stopped_data_address (struct target_ops *ops, CORE_ADDR *addr_p)
{
ptid_t saved_ptid = inferior_ptid;
struct target_ops *beneath = find_target_beneath (ops);
int result;
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
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inferior_ptid = get_base_thread_from_ravenscar_task (saved_ptid);
watchpoint regression debugging with remote protocol (bare metal) We have noticed a regression in our watchpoint support when debugging through the remote protocol a program running on a bare metal platform, when the program uses what we call the Ravenscar Runtime. This runtime is a subset of the Ada runtime defined by the Ravenscar Profile. One of the nice things about this runtime is that it provides tasking, which is equivalent to the concept of threads in C (it is actually often mapped to threads, when available). For bare metal targets, however, there is no OS, and therefore no thread layer. What we did, then, was add a ravenscar-thread layer, which has insider knowledge of the runtime to get the list of threads, but also all necessary info to perform thread switching. For the record, the commit which caused the regression is: commit 799a2abe613be0645b84f5aaa050f2f91e6ae3f7 Date: Mon Nov 30 16:05:16 2015 +0000 Subject: remote: stop reason and watchpoint data address per thread Running local-watch-wrong-thread.exp with "maint set target-non-stop on" exposes that gdb/remote.c only records whether the target stopped for a breakpoint/watchpoint plus the watchpoint data address *for the last reported remote event*. But in non-stop mode, we need to keep that info per-thread, as each thread can end up with its own last-status pending. Our testcase is very simple. We have a package defining a global variable named "Watch"... package Pck is Watch : Integer := 1974; end Pck; ... and a main subprogram which changes its value procedure Foo is begin Pck.Watch := Pck.Watch + 1; end Foo; To reproduce, we built our program as usual, started it in QEMU, and then connected GDB to QEMU... (gdb) target remote :4444 (gdb) break _ada_foo (gdb) cont <--- this is to make sure the program is started and the variable we want to watch is initialized ... at which point we try to use a watchpoint on our global variable: (gdb) watch watch ... but, upon resuming the execution with a "cont", we expected to get a watchpoint-hit notification, such as... (gdb) cont Hardware watchpoint 2: watch Old value = 1974 New value = 1975 0xfff00258 in foo () at /[...]/foo.adb:6 6 end Foo; ... but unfortunately, we get a SIGTRAP instead: (gdb) cont Program received signal SIGTRAP, Trace/breakpoint trap. foo () at /[...]/foo.adb:6 6 end Foo; What happens is that, on the one hand, the change in remote.c now stores the watchpoint-hit notification info in the thread that received it; and on the other hand, we have a ravenscar-thread layer which manages the thread list on top of the remote protocol layer. The two of them get disconnected, and this eventually results in GDB not realizing that we hit a watchpoint. Below is how: First, once connected and just before inserting our watchpoint, we have the ravenscar-thread layer which built the list of threads by extracting some info from inferior memory, giving us the following two threads: (gdb) info threads Id Target Id Frame 1 Thread 0 "0Q@" (Ravenscar task) foo () at /[...]/foo.adb:5 * 2 Thread 0x24618 (Ravenscar task) foo () at /[...]/foo.adb:5 The first thread is the only thread QEMU told GDB about. The second one is a thread that the ravenscar-thread added. QEMU has now way to know about those threads, since they are really embedded inside the program; that's why we have the ravenscar layer, which uses inside-knowledge to extract the list of threads. Next, we insert a watchpoint, which applies to all threads. No problem so far. Then, we continue; meaning that GDB sends a Z2 packet to QEMU to get the watchpoint inserted, then a vCont to resume the program's execution. The program hits the watchpoints, and thererfore QEMU reports it back: Packet received: T05thread:01;watch:000022c4; Since QEMU knows about one thread and one thread only, it stands to reason that it would say that the event applies to thread:01, which is our first thread in the "info threads" listing. That thread has a ptid of {42000, lwp=1, tid=0}. This is where Pedro's change kicks in: Seeing this event, and having determined that the event was reported for thread 01, and therefore ptid {42000, lwp=1, tid=0}, it saves the watchpoint-hit event info in the private area of that thread/ptid. Once this is done, remote.c's event-wait layer returns. Enter the ravenscar-thread layer of the event-wait, which does a little dance to delegate the wait to underlying layers with ptids that those layers know about, and then when the target_beneath's to_wait is done, tries to figure out which thread is now the active thread. The code looks like this: 1. inferior_ptid = base_ptid; 2. beneath->to_wait (beneath, base_ptid, status, 0); 3. [...] 4. ravenscar_update_inferior_ptid (); 5. 6. return inferior_ptid; Line 1 is where we reset inferior_ptid to the ptid that the target_beneath layer knows about, allowing us to then call its to_wait implementation (line 2). And then, upon return, we call ravenscar_update_inferior_ptid, which reads inferior memory to determine which thread is actually active, setting inferior_ptid accordingly. Then we return that inferior_ptid (which, again, neither QEMU and therefore nor the remote.c layer knows about). Upon return, we eventually arrive to the part where we try to handle the inferior event: we discover that we got a SIGTRAP and, as part of its handling, we call watchpoints_triggered, which calls target_stopped_by_watchpoint, which eventually remote_stopped_by_watchpoint, where Pedro's change kicks in again: struct thread_info *thread = inferior_thread (); return (thread->priv != NULL && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT); Because the ravenscar-thread layer changed the inferior_ptid to the ptid of the active thread, inferior_thread now returns the private data of that thread. This is not the thread that QEMU reported the watchpoint-hit on, and thus, the function returns "no watchpoint hit, mister". Hence GDB not understanding the SIGTRAP, thus reporting it verbatim. The way we chose to fix the issue is by making sure that the ravenscar-thread layer doesn't let the remote layer be called with inferior_ptid being set to a thread that the remote layer does not know about. gdb/ChangeLog: * ravenscar-thread.c (ravenscar_stopped_by_sw_breakpoint) (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): New functions. (init_ravenscar_thread_ops): Set the to_stopped_by_sw_breakpoint, to_stopped_by_hw_breakpoint, to_stopped_by_watchpoint, to_stopped_data_address and to_core_of_thread fields of ravenscar_ops.
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result = beneath->to_stopped_data_address (beneath, addr_p);
inferior_ptid = saved_ptid;
return result;
}
static void
ravenscar_mourn_inferior (struct target_ops *ops)
{
struct target_ops *beneath = find_target_beneath (ops);
base_ptid = null_ptid;
beneath->to_mourn_inferior (beneath);
unpush_target (&ravenscar_ops);
}
watchpoint regression debugging with remote protocol (bare metal) We have noticed a regression in our watchpoint support when debugging through the remote protocol a program running on a bare metal platform, when the program uses what we call the Ravenscar Runtime. This runtime is a subset of the Ada runtime defined by the Ravenscar Profile. One of the nice things about this runtime is that it provides tasking, which is equivalent to the concept of threads in C (it is actually often mapped to threads, when available). For bare metal targets, however, there is no OS, and therefore no thread layer. What we did, then, was add a ravenscar-thread layer, which has insider knowledge of the runtime to get the list of threads, but also all necessary info to perform thread switching. For the record, the commit which caused the regression is: commit 799a2abe613be0645b84f5aaa050f2f91e6ae3f7 Date: Mon Nov 30 16:05:16 2015 +0000 Subject: remote: stop reason and watchpoint data address per thread Running local-watch-wrong-thread.exp with "maint set target-non-stop on" exposes that gdb/remote.c only records whether the target stopped for a breakpoint/watchpoint plus the watchpoint data address *for the last reported remote event*. But in non-stop mode, we need to keep that info per-thread, as each thread can end up with its own last-status pending. Our testcase is very simple. We have a package defining a global variable named "Watch"... package Pck is Watch : Integer := 1974; end Pck; ... and a main subprogram which changes its value procedure Foo is begin Pck.Watch := Pck.Watch + 1; end Foo; To reproduce, we built our program as usual, started it in QEMU, and then connected GDB to QEMU... (gdb) target remote :4444 (gdb) break _ada_foo (gdb) cont <--- this is to make sure the program is started and the variable we want to watch is initialized ... at which point we try to use a watchpoint on our global variable: (gdb) watch watch ... but, upon resuming the execution with a "cont", we expected to get a watchpoint-hit notification, such as... (gdb) cont Hardware watchpoint 2: watch Old value = 1974 New value = 1975 0xfff00258 in foo () at /[...]/foo.adb:6 6 end Foo; ... but unfortunately, we get a SIGTRAP instead: (gdb) cont Program received signal SIGTRAP, Trace/breakpoint trap. foo () at /[...]/foo.adb:6 6 end Foo; What happens is that, on the one hand, the change in remote.c now stores the watchpoint-hit notification info in the thread that received it; and on the other hand, we have a ravenscar-thread layer which manages the thread list on top of the remote protocol layer. The two of them get disconnected, and this eventually results in GDB not realizing that we hit a watchpoint. Below is how: First, once connected and just before inserting our watchpoint, we have the ravenscar-thread layer which built the list of threads by extracting some info from inferior memory, giving us the following two threads: (gdb) info threads Id Target Id Frame 1 Thread 0 "0Q@" (Ravenscar task) foo () at /[...]/foo.adb:5 * 2 Thread 0x24618 (Ravenscar task) foo () at /[...]/foo.adb:5 The first thread is the only thread QEMU told GDB about. The second one is a thread that the ravenscar-thread added. QEMU has now way to know about those threads, since they are really embedded inside the program; that's why we have the ravenscar layer, which uses inside-knowledge to extract the list of threads. Next, we insert a watchpoint, which applies to all threads. No problem so far. Then, we continue; meaning that GDB sends a Z2 packet to QEMU to get the watchpoint inserted, then a vCont to resume the program's execution. The program hits the watchpoints, and thererfore QEMU reports it back: Packet received: T05thread:01;watch:000022c4; Since QEMU knows about one thread and one thread only, it stands to reason that it would say that the event applies to thread:01, which is our first thread in the "info threads" listing. That thread has a ptid of {42000, lwp=1, tid=0}. This is where Pedro's change kicks in: Seeing this event, and having determined that the event was reported for thread 01, and therefore ptid {42000, lwp=1, tid=0}, it saves the watchpoint-hit event info in the private area of that thread/ptid. Once this is done, remote.c's event-wait layer returns. Enter the ravenscar-thread layer of the event-wait, which does a little dance to delegate the wait to underlying layers with ptids that those layers know about, and then when the target_beneath's to_wait is done, tries to figure out which thread is now the active thread. The code looks like this: 1. inferior_ptid = base_ptid; 2. beneath->to_wait (beneath, base_ptid, status, 0); 3. [...] 4. ravenscar_update_inferior_ptid (); 5. 6. return inferior_ptid; Line 1 is where we reset inferior_ptid to the ptid that the target_beneath layer knows about, allowing us to then call its to_wait implementation (line 2). And then, upon return, we call ravenscar_update_inferior_ptid, which reads inferior memory to determine which thread is actually active, setting inferior_ptid accordingly. Then we return that inferior_ptid (which, again, neither QEMU and therefore nor the remote.c layer knows about). Upon return, we eventually arrive to the part where we try to handle the inferior event: we discover that we got a SIGTRAP and, as part of its handling, we call watchpoints_triggered, which calls target_stopped_by_watchpoint, which eventually remote_stopped_by_watchpoint, where Pedro's change kicks in again: struct thread_info *thread = inferior_thread (); return (thread->priv != NULL && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT); Because the ravenscar-thread layer changed the inferior_ptid to the ptid of the active thread, inferior_thread now returns the private data of that thread. This is not the thread that QEMU reported the watchpoint-hit on, and thus, the function returns "no watchpoint hit, mister". Hence GDB not understanding the SIGTRAP, thus reporting it verbatim. The way we chose to fix the issue is by making sure that the ravenscar-thread layer doesn't let the remote layer be called with inferior_ptid being set to a thread that the remote layer does not know about. gdb/ChangeLog: * ravenscar-thread.c (ravenscar_stopped_by_sw_breakpoint) (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): New functions. (init_ravenscar_thread_ops): Set the to_stopped_by_sw_breakpoint, to_stopped_by_hw_breakpoint, to_stopped_by_watchpoint, to_stopped_data_address and to_core_of_thread fields of ravenscar_ops.
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/* Implement the to_core_of_thread target_ops "method". */
static int
ravenscar_core_of_thread (struct target_ops *ops, ptid_t ptid)
{
ptid_t saved_ptid = inferior_ptid;
struct target_ops *beneath = find_target_beneath (ops);
int result;
Add multiple-CPU support in ravenscar-thread.c This patch reworks the ravenscar-thread layer to remove the assumption that the target only has 1 CPU. In particular, when connected to a QEMU target over the remote protocol, QEMU reports each CPU as one thread. This patch adapts the ravenscar-thread layer to this, and adds a large comment explaining the general design of this unit. gdb/ChangeLog: * ada-lang.h (ada_get_task_info_from_ptid): Add declaration. * ada-tasks.c (ada_get_task_info_from_ptid): New function. * ravenscar-thread.c: Add into comment. (base_magic_null_ptid): Delete. (base_ptid): Change documentation. (ravenscar_active_task): Renames ravenscar_running_thread. All callers updated throughout. (is_ravenscar_task, ravenscar_get_thread_base_cpu): New function. (ravenscar_task_is_currently_active): Likewise. (get_base_thread_from_ravenscar_task): Ditto. (ravenscar_update_inferior_ptid): Adjust to handle multiple CPUs. (ravenscar_runtime_initialized): Likewise. (get_running_thread_id): Add new parameter "cpu". Adjust implementation to handle this new parameter. (ravenscar_fetch_registers): Small adjustment to use is_ravenscar_task and ravenscar_task_is_currently_active in order to decide whether to use the target beneath or this module's arch_ops. (ravenscar_store_registers, ravenscar_prepare_to_store): Likewise. (ravenscar_stopped_by_sw_breakpoint): Use get_base_thread_from_ravenscar_task to get the underlying thread, rather than using base_ptid. (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): Likewise. (ravenscar_inferior_created): Do not set base_magic_null_ptid.
2017-11-21 23:00:30 +01:00
inferior_ptid = get_base_thread_from_ravenscar_task (saved_ptid);
watchpoint regression debugging with remote protocol (bare metal) We have noticed a regression in our watchpoint support when debugging through the remote protocol a program running on a bare metal platform, when the program uses what we call the Ravenscar Runtime. This runtime is a subset of the Ada runtime defined by the Ravenscar Profile. One of the nice things about this runtime is that it provides tasking, which is equivalent to the concept of threads in C (it is actually often mapped to threads, when available). For bare metal targets, however, there is no OS, and therefore no thread layer. What we did, then, was add a ravenscar-thread layer, which has insider knowledge of the runtime to get the list of threads, but also all necessary info to perform thread switching. For the record, the commit which caused the regression is: commit 799a2abe613be0645b84f5aaa050f2f91e6ae3f7 Date: Mon Nov 30 16:05:16 2015 +0000 Subject: remote: stop reason and watchpoint data address per thread Running local-watch-wrong-thread.exp with "maint set target-non-stop on" exposes that gdb/remote.c only records whether the target stopped for a breakpoint/watchpoint plus the watchpoint data address *for the last reported remote event*. But in non-stop mode, we need to keep that info per-thread, as each thread can end up with its own last-status pending. Our testcase is very simple. We have a package defining a global variable named "Watch"... package Pck is Watch : Integer := 1974; end Pck; ... and a main subprogram which changes its value procedure Foo is begin Pck.Watch := Pck.Watch + 1; end Foo; To reproduce, we built our program as usual, started it in QEMU, and then connected GDB to QEMU... (gdb) target remote :4444 (gdb) break _ada_foo (gdb) cont <--- this is to make sure the program is started and the variable we want to watch is initialized ... at which point we try to use a watchpoint on our global variable: (gdb) watch watch ... but, upon resuming the execution with a "cont", we expected to get a watchpoint-hit notification, such as... (gdb) cont Hardware watchpoint 2: watch Old value = 1974 New value = 1975 0xfff00258 in foo () at /[...]/foo.adb:6 6 end Foo; ... but unfortunately, we get a SIGTRAP instead: (gdb) cont Program received signal SIGTRAP, Trace/breakpoint trap. foo () at /[...]/foo.adb:6 6 end Foo; What happens is that, on the one hand, the change in remote.c now stores the watchpoint-hit notification info in the thread that received it; and on the other hand, we have a ravenscar-thread layer which manages the thread list on top of the remote protocol layer. The two of them get disconnected, and this eventually results in GDB not realizing that we hit a watchpoint. Below is how: First, once connected and just before inserting our watchpoint, we have the ravenscar-thread layer which built the list of threads by extracting some info from inferior memory, giving us the following two threads: (gdb) info threads Id Target Id Frame 1 Thread 0 "0Q@" (Ravenscar task) foo () at /[...]/foo.adb:5 * 2 Thread 0x24618 (Ravenscar task) foo () at /[...]/foo.adb:5 The first thread is the only thread QEMU told GDB about. The second one is a thread that the ravenscar-thread added. QEMU has now way to know about those threads, since they are really embedded inside the program; that's why we have the ravenscar layer, which uses inside-knowledge to extract the list of threads. Next, we insert a watchpoint, which applies to all threads. No problem so far. Then, we continue; meaning that GDB sends a Z2 packet to QEMU to get the watchpoint inserted, then a vCont to resume the program's execution. The program hits the watchpoints, and thererfore QEMU reports it back: Packet received: T05thread:01;watch:000022c4; Since QEMU knows about one thread and one thread only, it stands to reason that it would say that the event applies to thread:01, which is our first thread in the "info threads" listing. That thread has a ptid of {42000, lwp=1, tid=0}. This is where Pedro's change kicks in: Seeing this event, and having determined that the event was reported for thread 01, and therefore ptid {42000, lwp=1, tid=0}, it saves the watchpoint-hit event info in the private area of that thread/ptid. Once this is done, remote.c's event-wait layer returns. Enter the ravenscar-thread layer of the event-wait, which does a little dance to delegate the wait to underlying layers with ptids that those layers know about, and then when the target_beneath's to_wait is done, tries to figure out which thread is now the active thread. The code looks like this: 1. inferior_ptid = base_ptid; 2. beneath->to_wait (beneath, base_ptid, status, 0); 3. [...] 4. ravenscar_update_inferior_ptid (); 5. 6. return inferior_ptid; Line 1 is where we reset inferior_ptid to the ptid that the target_beneath layer knows about, allowing us to then call its to_wait implementation (line 2). And then, upon return, we call ravenscar_update_inferior_ptid, which reads inferior memory to determine which thread is actually active, setting inferior_ptid accordingly. Then we return that inferior_ptid (which, again, neither QEMU and therefore nor the remote.c layer knows about). Upon return, we eventually arrive to the part where we try to handle the inferior event: we discover that we got a SIGTRAP and, as part of its handling, we call watchpoints_triggered, which calls target_stopped_by_watchpoint, which eventually remote_stopped_by_watchpoint, where Pedro's change kicks in again: struct thread_info *thread = inferior_thread (); return (thread->priv != NULL && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT); Because the ravenscar-thread layer changed the inferior_ptid to the ptid of the active thread, inferior_thread now returns the private data of that thread. This is not the thread that QEMU reported the watchpoint-hit on, and thus, the function returns "no watchpoint hit, mister". Hence GDB not understanding the SIGTRAP, thus reporting it verbatim. The way we chose to fix the issue is by making sure that the ravenscar-thread layer doesn't let the remote layer be called with inferior_ptid being set to a thread that the remote layer does not know about. gdb/ChangeLog: * ravenscar-thread.c (ravenscar_stopped_by_sw_breakpoint) (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): New functions. (init_ravenscar_thread_ops): Set the to_stopped_by_sw_breakpoint, to_stopped_by_hw_breakpoint, to_stopped_by_watchpoint, to_stopped_data_address and to_core_of_thread fields of ravenscar_ops.
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result = beneath->to_core_of_thread (beneath, inferior_ptid);
inferior_ptid = saved_ptid;
return result;
}
/* Observer on inferior_created: push ravenscar thread stratum if needed. */
static void
ravenscar_inferior_created (struct target_ops *target, int from_tty)
{
problem debugging ravenscar programs if runtime is stripped Trying to debug a program using a stripped version of the ravenscar runtime, we can get the following error: (gdb) cont Continuing. Cannot find Ada_Task_Control_Block type. Aborting This is because the ravenscar-thread layer makes the assumption that the runtime is built the way we expect it, meaning that the Ada tasking units we rely on for Ada tasking debugging, are built with debugging information, and that this debug information has not been stripped from the runtime. When this assumption is not true, resuming such a program can trigger the error above, which then leads GDB a little confused. For instance, we can see things like: (gdb) bt Target is executing. This patch fixes the issue by disabling the ravenscar thread layer if we detect that the runtime is missing some of the debugging info we need in order to support Ada task debugging. This is the best we can do, as the ravenscar-thread layer actually depends on the ada-tasks layer to implement thread debugging. gdb/ChangeLog: * ada-lang.h (ada_get_tcb_types_info): Add declaration. * ada-tasks.c (ada_get_tcb_types_info): Renames get_tcb_types_info. Make non-static. Change return type to char *. Adjust code accordingly. Rewrite the function's documentation. (read_atcb): Adjust call to get_tcb_types_info accordingly. * ravenscar-thread.c (ravenscar_inferior_created): Check that we have enough debugging information in the runtime to support Ada task debugging before we enable the ravenscar-thread layer.
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const char *err_msg;
if (!ravenscar_task_support
|| gdbarch_ravenscar_ops (target_gdbarch ()) == NULL
|| !has_ravenscar_runtime ())
return;
problem debugging ravenscar programs if runtime is stripped Trying to debug a program using a stripped version of the ravenscar runtime, we can get the following error: (gdb) cont Continuing. Cannot find Ada_Task_Control_Block type. Aborting This is because the ravenscar-thread layer makes the assumption that the runtime is built the way we expect it, meaning that the Ada tasking units we rely on for Ada tasking debugging, are built with debugging information, and that this debug information has not been stripped from the runtime. When this assumption is not true, resuming such a program can trigger the error above, which then leads GDB a little confused. For instance, we can see things like: (gdb) bt Target is executing. This patch fixes the issue by disabling the ravenscar thread layer if we detect that the runtime is missing some of the debugging info we need in order to support Ada task debugging. This is the best we can do, as the ravenscar-thread layer actually depends on the ada-tasks layer to implement thread debugging. gdb/ChangeLog: * ada-lang.h (ada_get_tcb_types_info): Add declaration. * ada-tasks.c (ada_get_tcb_types_info): Renames get_tcb_types_info. Make non-static. Change return type to char *. Adjust code accordingly. Rewrite the function's documentation. (read_atcb): Adjust call to get_tcb_types_info accordingly. * ravenscar-thread.c (ravenscar_inferior_created): Check that we have enough debugging information in the runtime to support Ada task debugging before we enable the ravenscar-thread layer.
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err_msg = ada_get_tcb_types_info ();
if (err_msg != NULL)
{
warning (_("%s. Task/thread support disabled."), err_msg);
problem debugging ravenscar programs if runtime is stripped Trying to debug a program using a stripped version of the ravenscar runtime, we can get the following error: (gdb) cont Continuing. Cannot find Ada_Task_Control_Block type. Aborting This is because the ravenscar-thread layer makes the assumption that the runtime is built the way we expect it, meaning that the Ada tasking units we rely on for Ada tasking debugging, are built with debugging information, and that this debug information has not been stripped from the runtime. When this assumption is not true, resuming such a program can trigger the error above, which then leads GDB a little confused. For instance, we can see things like: (gdb) bt Target is executing. This patch fixes the issue by disabling the ravenscar thread layer if we detect that the runtime is missing some of the debugging info we need in order to support Ada task debugging. This is the best we can do, as the ravenscar-thread layer actually depends on the ada-tasks layer to implement thread debugging. gdb/ChangeLog: * ada-lang.h (ada_get_tcb_types_info): Add declaration. * ada-tasks.c (ada_get_tcb_types_info): Renames get_tcb_types_info. Make non-static. Change return type to char *. Adjust code accordingly. Rewrite the function's documentation. (read_atcb): Adjust call to get_tcb_types_info accordingly. * ravenscar-thread.c (ravenscar_inferior_created): Check that we have enough debugging information in the runtime to support Ada task debugging before we enable the ravenscar-thread layer.
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return;
}
ravenscar_update_inferior_ptid ();
push_target (&ravenscar_ops);
}
static ptid_t
ravenscar_get_ada_task_ptid (struct target_ops *self, long lwp, long thread)
{
return ptid_build (ptid_get_pid (base_ptid), 0, thread);
}
static void
init_ravenscar_thread_ops (void)
{
ravenscar_ops.to_shortname = "ravenscar";
ravenscar_ops.to_longname = "Ravenscar tasks.";
ravenscar_ops.to_doc = "Ravenscar tasks support.";
ravenscar_ops.to_resume = ravenscar_resume;
ravenscar_ops.to_wait = ravenscar_wait;
ravenscar_ops.to_fetch_registers = ravenscar_fetch_registers;
ravenscar_ops.to_store_registers = ravenscar_store_registers;
ravenscar_ops.to_prepare_to_store = ravenscar_prepare_to_store;
watchpoint regression debugging with remote protocol (bare metal) We have noticed a regression in our watchpoint support when debugging through the remote protocol a program running on a bare metal platform, when the program uses what we call the Ravenscar Runtime. This runtime is a subset of the Ada runtime defined by the Ravenscar Profile. One of the nice things about this runtime is that it provides tasking, which is equivalent to the concept of threads in C (it is actually often mapped to threads, when available). For bare metal targets, however, there is no OS, and therefore no thread layer. What we did, then, was add a ravenscar-thread layer, which has insider knowledge of the runtime to get the list of threads, but also all necessary info to perform thread switching. For the record, the commit which caused the regression is: commit 799a2abe613be0645b84f5aaa050f2f91e6ae3f7 Date: Mon Nov 30 16:05:16 2015 +0000 Subject: remote: stop reason and watchpoint data address per thread Running local-watch-wrong-thread.exp with "maint set target-non-stop on" exposes that gdb/remote.c only records whether the target stopped for a breakpoint/watchpoint plus the watchpoint data address *for the last reported remote event*. But in non-stop mode, we need to keep that info per-thread, as each thread can end up with its own last-status pending. Our testcase is very simple. We have a package defining a global variable named "Watch"... package Pck is Watch : Integer := 1974; end Pck; ... and a main subprogram which changes its value procedure Foo is begin Pck.Watch := Pck.Watch + 1; end Foo; To reproduce, we built our program as usual, started it in QEMU, and then connected GDB to QEMU... (gdb) target remote :4444 (gdb) break _ada_foo (gdb) cont <--- this is to make sure the program is started and the variable we want to watch is initialized ... at which point we try to use a watchpoint on our global variable: (gdb) watch watch ... but, upon resuming the execution with a "cont", we expected to get a watchpoint-hit notification, such as... (gdb) cont Hardware watchpoint 2: watch Old value = 1974 New value = 1975 0xfff00258 in foo () at /[...]/foo.adb:6 6 end Foo; ... but unfortunately, we get a SIGTRAP instead: (gdb) cont Program received signal SIGTRAP, Trace/breakpoint trap. foo () at /[...]/foo.adb:6 6 end Foo; What happens is that, on the one hand, the change in remote.c now stores the watchpoint-hit notification info in the thread that received it; and on the other hand, we have a ravenscar-thread layer which manages the thread list on top of the remote protocol layer. The two of them get disconnected, and this eventually results in GDB not realizing that we hit a watchpoint. Below is how: First, once connected and just before inserting our watchpoint, we have the ravenscar-thread layer which built the list of threads by extracting some info from inferior memory, giving us the following two threads: (gdb) info threads Id Target Id Frame 1 Thread 0 "0Q@" (Ravenscar task) foo () at /[...]/foo.adb:5 * 2 Thread 0x24618 (Ravenscar task) foo () at /[...]/foo.adb:5 The first thread is the only thread QEMU told GDB about. The second one is a thread that the ravenscar-thread added. QEMU has now way to know about those threads, since they are really embedded inside the program; that's why we have the ravenscar layer, which uses inside-knowledge to extract the list of threads. Next, we insert a watchpoint, which applies to all threads. No problem so far. Then, we continue; meaning that GDB sends a Z2 packet to QEMU to get the watchpoint inserted, then a vCont to resume the program's execution. The program hits the watchpoints, and thererfore QEMU reports it back: Packet received: T05thread:01;watch:000022c4; Since QEMU knows about one thread and one thread only, it stands to reason that it would say that the event applies to thread:01, which is our first thread in the "info threads" listing. That thread has a ptid of {42000, lwp=1, tid=0}. This is where Pedro's change kicks in: Seeing this event, and having determined that the event was reported for thread 01, and therefore ptid {42000, lwp=1, tid=0}, it saves the watchpoint-hit event info in the private area of that thread/ptid. Once this is done, remote.c's event-wait layer returns. Enter the ravenscar-thread layer of the event-wait, which does a little dance to delegate the wait to underlying layers with ptids that those layers know about, and then when the target_beneath's to_wait is done, tries to figure out which thread is now the active thread. The code looks like this: 1. inferior_ptid = base_ptid; 2. beneath->to_wait (beneath, base_ptid, status, 0); 3. [...] 4. ravenscar_update_inferior_ptid (); 5. 6. return inferior_ptid; Line 1 is where we reset inferior_ptid to the ptid that the target_beneath layer knows about, allowing us to then call its to_wait implementation (line 2). And then, upon return, we call ravenscar_update_inferior_ptid, which reads inferior memory to determine which thread is actually active, setting inferior_ptid accordingly. Then we return that inferior_ptid (which, again, neither QEMU and therefore nor the remote.c layer knows about). Upon return, we eventually arrive to the part where we try to handle the inferior event: we discover that we got a SIGTRAP and, as part of its handling, we call watchpoints_triggered, which calls target_stopped_by_watchpoint, which eventually remote_stopped_by_watchpoint, where Pedro's change kicks in again: struct thread_info *thread = inferior_thread (); return (thread->priv != NULL && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT); Because the ravenscar-thread layer changed the inferior_ptid to the ptid of the active thread, inferior_thread now returns the private data of that thread. This is not the thread that QEMU reported the watchpoint-hit on, and thus, the function returns "no watchpoint hit, mister". Hence GDB not understanding the SIGTRAP, thus reporting it verbatim. The way we chose to fix the issue is by making sure that the ravenscar-thread layer doesn't let the remote layer be called with inferior_ptid being set to a thread that the remote layer does not know about. gdb/ChangeLog: * ravenscar-thread.c (ravenscar_stopped_by_sw_breakpoint) (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): New functions. (init_ravenscar_thread_ops): Set the to_stopped_by_sw_breakpoint, to_stopped_by_hw_breakpoint, to_stopped_by_watchpoint, to_stopped_data_address and to_core_of_thread fields of ravenscar_ops.
2017-11-21 22:42:48 +01:00
ravenscar_ops.to_stopped_by_sw_breakpoint
= ravenscar_stopped_by_sw_breakpoint;
ravenscar_ops.to_stopped_by_hw_breakpoint
= ravenscar_stopped_by_hw_breakpoint;
ravenscar_ops.to_stopped_by_watchpoint = ravenscar_stopped_by_watchpoint;
ravenscar_ops.to_stopped_data_address = ravenscar_stopped_data_address;
ravenscar_ops.to_thread_alive = ravenscar_thread_alive;
Push pruning old threads down to the target When GDB wants to sync the thread list with the target's (e.g., due to "info threads"), it calls update_thread_list: update_thread_list (void) { prune_threads (); target_find_new_threads (); update_threads_executing (); } And then prune_threads does: prune_threads (void) { struct thread_info *tp, *next; for (tp = thread_list; tp; tp = next) { next = tp->next; if (!thread_alive (tp)) delete_thread (tp->ptid); } } Calling thread_live on each thread one by one is expensive. E.g., on Linux, it ends up doing kill(SIG0) once for each thread. Not a big deal, but still a bunch of syscalls... With the remote target, it's cumbersome. That thread_alive call ends up generating one T packet per thread: Sending packet: $Tp2141.2150#82...Packet received: OK Sending packet: $Tp2141.214f#b7...Packet received: OK Sending packet: $Tp2141.2141#82...Packet received: OK Sending packet: $qXfer:threads:read::0,fff#03...Packet received: l<threads>\n<thread id="p2141.2141" core="2"/>\n<thread id="p2141.214f" core="1"/>\n<thread id="p2141.2150" core="2"/>\n</threads>\n That seems a bit silly when target_find_new_threads method implementations will always fetch the whole current set of target threads, and then add those that are not in GDB's thread list, to GDB's thread list. This patch thus pushes down the responsibility of pruning dead threads to the target_find_new_threads method instead, so a target may implement pruning dead threads however it wants. Once we do that, target_find_new_threads becomes a misnomer, so the patch renames it to target_update_thread_list. The patch doesn't attempt to do any optimization to any target yet. It simply exports prune_threads, and makes all implementations of target_update_thread_list call that. It's meant to be a no-op. gdb/ 2014-10-15 Pedro Alves <palves@redhat.com> * ada-tasks.c (print_ada_task_info, task_command_1): Adjust. * bsd-uthread.c (bsd_uthread_find_new_threads): Rename to ... (bsd_uthread_update_thread_list): ... this. Call prune_threads. (bsd_uthread_target): Adjust. * corelow.c (core_open): Adjust. * dec-thread.c (dec_thread_find_new_threads): Update comment. (dec_thread_update_thread_list): New function. (init_dec_thread_ops): Adjust. * gdbthread.h (prune_threads): New declaration. * linux-thread-db.c (thread_db_find_new_threads): Rename to ... (thread_db_update_thread_list): ... this. Call prune_threads. (init_thread_db_ops): Adjust. * nto-procfs.c (procfs_find_new_threads): Rename to ... (procfs_update_thread_list): ... this. Call prune_threads. (procfs_attach, procfs_create_inferior, init_procfs_targets): Adjust. * obsd-nat.c (obsd_find_new_threads): Rename to ... (obsd_update_thread_list): ... this. Call prune_threads. (obsd_add_target): Adjust. * procfs.c (procfs_target): Adjust. (procfs_notice_thread): Update comment. (procfs_find_new_threads): Rename to ... (procfs_update_thread_list): ... this. Call prune_threads. * ravenscar-thread.c (ravenscar_update_inferior_ptid): Update comment. (ravenscar_wait): Adjust. (ravenscar_find_new_threads): Rename to ... (ravenscar_update_thread_list): ... this. Call prune_threads. (init_ravenscar_thread_ops): Adjust. * record-btrace.c (record_btrace_find_new_threads): Rename to ... (record_btrace_update_thread_list): ... this. Adjust comment. (init_record_btrace_ops): Adjust. * remote.c (remote_threads_info): Rename to ... (remote_update_thread_list): ... this. Call prune_threads. (remote_start_remote, extended_remote_attach_1, init_remote_ops): Adjust. * sol-thread.c (check_for_thread_db): Adjust. (sol_find_new_threads_callback): Rename to ... (sol_update_thread_list_callback): ... this. (sol_find_new_threads): Rename to ... (sol_update_thread_list): ... this. Call prune_threads. Adjust. (sol_get_ada_task_ptid, init_sol_thread_ops): Adjust. * target-delegates.c: Regenerate. * target.c (target_find_new_threads): Rename to ... (target_update_thread_list): ... this. * target.h (struct target_ops): Rename to_find_new_threads field to to_update_thread_list. (target_find_new_threads): Rename to ... (target_update_thread_list): ... this. * thread.c (prune_threads): Make extern. (update_thread_list): Adjust.
2014-10-15 23:44:00 +02:00
ravenscar_ops.to_update_thread_list = ravenscar_update_thread_list;
ravenscar_ops.to_pid_to_str = ravenscar_pid_to_str;
ravenscar_ops.to_extra_thread_info = ravenscar_extra_thread_info;
ravenscar_ops.to_get_ada_task_ptid = ravenscar_get_ada_task_ptid;
ravenscar_ops.to_mourn_inferior = ravenscar_mourn_inferior;
ravenscar_ops.to_has_all_memory = default_child_has_all_memory;
ravenscar_ops.to_has_memory = default_child_has_memory;
ravenscar_ops.to_has_stack = default_child_has_stack;
ravenscar_ops.to_has_registers = default_child_has_registers;
ravenscar_ops.to_has_execution = default_child_has_execution;
ravenscar_ops.to_stratum = thread_stratum;
watchpoint regression debugging with remote protocol (bare metal) We have noticed a regression in our watchpoint support when debugging through the remote protocol a program running on a bare metal platform, when the program uses what we call the Ravenscar Runtime. This runtime is a subset of the Ada runtime defined by the Ravenscar Profile. One of the nice things about this runtime is that it provides tasking, which is equivalent to the concept of threads in C (it is actually often mapped to threads, when available). For bare metal targets, however, there is no OS, and therefore no thread layer. What we did, then, was add a ravenscar-thread layer, which has insider knowledge of the runtime to get the list of threads, but also all necessary info to perform thread switching. For the record, the commit which caused the regression is: commit 799a2abe613be0645b84f5aaa050f2f91e6ae3f7 Date: Mon Nov 30 16:05:16 2015 +0000 Subject: remote: stop reason and watchpoint data address per thread Running local-watch-wrong-thread.exp with "maint set target-non-stop on" exposes that gdb/remote.c only records whether the target stopped for a breakpoint/watchpoint plus the watchpoint data address *for the last reported remote event*. But in non-stop mode, we need to keep that info per-thread, as each thread can end up with its own last-status pending. Our testcase is very simple. We have a package defining a global variable named "Watch"... package Pck is Watch : Integer := 1974; end Pck; ... and a main subprogram which changes its value procedure Foo is begin Pck.Watch := Pck.Watch + 1; end Foo; To reproduce, we built our program as usual, started it in QEMU, and then connected GDB to QEMU... (gdb) target remote :4444 (gdb) break _ada_foo (gdb) cont <--- this is to make sure the program is started and the variable we want to watch is initialized ... at which point we try to use a watchpoint on our global variable: (gdb) watch watch ... but, upon resuming the execution with a "cont", we expected to get a watchpoint-hit notification, such as... (gdb) cont Hardware watchpoint 2: watch Old value = 1974 New value = 1975 0xfff00258 in foo () at /[...]/foo.adb:6 6 end Foo; ... but unfortunately, we get a SIGTRAP instead: (gdb) cont Program received signal SIGTRAP, Trace/breakpoint trap. foo () at /[...]/foo.adb:6 6 end Foo; What happens is that, on the one hand, the change in remote.c now stores the watchpoint-hit notification info in the thread that received it; and on the other hand, we have a ravenscar-thread layer which manages the thread list on top of the remote protocol layer. The two of them get disconnected, and this eventually results in GDB not realizing that we hit a watchpoint. Below is how: First, once connected and just before inserting our watchpoint, we have the ravenscar-thread layer which built the list of threads by extracting some info from inferior memory, giving us the following two threads: (gdb) info threads Id Target Id Frame 1 Thread 0 "0Q@" (Ravenscar task) foo () at /[...]/foo.adb:5 * 2 Thread 0x24618 (Ravenscar task) foo () at /[...]/foo.adb:5 The first thread is the only thread QEMU told GDB about. The second one is a thread that the ravenscar-thread added. QEMU has now way to know about those threads, since they are really embedded inside the program; that's why we have the ravenscar layer, which uses inside-knowledge to extract the list of threads. Next, we insert a watchpoint, which applies to all threads. No problem so far. Then, we continue; meaning that GDB sends a Z2 packet to QEMU to get the watchpoint inserted, then a vCont to resume the program's execution. The program hits the watchpoints, and thererfore QEMU reports it back: Packet received: T05thread:01;watch:000022c4; Since QEMU knows about one thread and one thread only, it stands to reason that it would say that the event applies to thread:01, which is our first thread in the "info threads" listing. That thread has a ptid of {42000, lwp=1, tid=0}. This is where Pedro's change kicks in: Seeing this event, and having determined that the event was reported for thread 01, and therefore ptid {42000, lwp=1, tid=0}, it saves the watchpoint-hit event info in the private area of that thread/ptid. Once this is done, remote.c's event-wait layer returns. Enter the ravenscar-thread layer of the event-wait, which does a little dance to delegate the wait to underlying layers with ptids that those layers know about, and then when the target_beneath's to_wait is done, tries to figure out which thread is now the active thread. The code looks like this: 1. inferior_ptid = base_ptid; 2. beneath->to_wait (beneath, base_ptid, status, 0); 3. [...] 4. ravenscar_update_inferior_ptid (); 5. 6. return inferior_ptid; Line 1 is where we reset inferior_ptid to the ptid that the target_beneath layer knows about, allowing us to then call its to_wait implementation (line 2). And then, upon return, we call ravenscar_update_inferior_ptid, which reads inferior memory to determine which thread is actually active, setting inferior_ptid accordingly. Then we return that inferior_ptid (which, again, neither QEMU and therefore nor the remote.c layer knows about). Upon return, we eventually arrive to the part where we try to handle the inferior event: we discover that we got a SIGTRAP and, as part of its handling, we call watchpoints_triggered, which calls target_stopped_by_watchpoint, which eventually remote_stopped_by_watchpoint, where Pedro's change kicks in again: struct thread_info *thread = inferior_thread (); return (thread->priv != NULL && thread->priv->stop_reason == TARGET_STOPPED_BY_WATCHPOINT); Because the ravenscar-thread layer changed the inferior_ptid to the ptid of the active thread, inferior_thread now returns the private data of that thread. This is not the thread that QEMU reported the watchpoint-hit on, and thus, the function returns "no watchpoint hit, mister". Hence GDB not understanding the SIGTRAP, thus reporting it verbatim. The way we chose to fix the issue is by making sure that the ravenscar-thread layer doesn't let the remote layer be called with inferior_ptid being set to a thread that the remote layer does not know about. gdb/ChangeLog: * ravenscar-thread.c (ravenscar_stopped_by_sw_breakpoint) (ravenscar_stopped_by_hw_breakpoint, ravenscar_stopped_by_watchpoint) (ravenscar_stopped_data_address, ravenscar_core_of_thread): New functions. (init_ravenscar_thread_ops): Set the to_stopped_by_sw_breakpoint, to_stopped_by_hw_breakpoint, to_stopped_by_watchpoint, to_stopped_data_address and to_core_of_thread fields of ravenscar_ops.
2017-11-21 22:42:48 +01:00
ravenscar_ops.to_core_of_thread = ravenscar_core_of_thread;
ravenscar_ops.to_magic = OPS_MAGIC;
}
/* Command-list for the "set/show ravenscar" prefix command. */
static struct cmd_list_element *set_ravenscar_list;
static struct cmd_list_element *show_ravenscar_list;
/* Implement the "set ravenscar" prefix command. */
static void
Constify add_prefix_cmd This changes add_prefix_cmd to accept a const-taking function as an argument; then fixes up all the callers. In a couple of spots I had to add a non-const overload of a function, because the function is passed to two different command-adding "constructors". These overloads are temporary; once constification is complete they can be removed. This patch also fixes a typo I happened to notice while constifying. Note that this touches a couple of files (gnu-nat.c and go32-nat.c) that I can't build. So, while I made a best-effort there, I am not certain they will still compile. Tested by rebuilding. gdb/ChangeLog 2017-10-11 Tom Tromey <tom@tromey.com> * gdbthread.h (thread_command): Constify. * inferior.h (detach_command): Constify. * top.h (set_history, show_history): Constify. * arm-tdep.c (set_arm_command, show_arm_command): Constify. * serial.c (serial_set_cmd, serial_show_cmd): Constify. * bsd-kvm.c (bsd_kvm_cmd): Constify. * printcmd.c (set_command): Constify. (non_const_set_command): New function. * dcache.c (set_dcache_command, show_dcache_command): Constify. * breakpoint.c (enable_command, disable_command, delete_command) (catch_command, tcatch_command, set_breakpoint_cmd) (show_breakpoint_cmd): Constify. * macrocmd.c (macro_command): Constify. * infcmd.c (unset_command, kill_command, detach_command) (info_proc_cmd): Constify. * i386-tdep.c (set_mpx_cmd, show_mpx_cmd): Constify. * auto-load.c (show_auto_load_cmd, set_auto_load_cmd) (info_auto_load_cmd): Constify. * target-descriptions.c (set_tdesc_cmd, show_tdesc_cmd) (unset_tdesc_cmd): Constify. * ada-lang.c (set_ada_command, show_ada_command) (maint_set_ada_cmd, maint_show_ada_cmd): Constify. * guile/guile.c (set_guile_command, show_guile_command) (info_guile_command): Constify. * tui/tui-win.c (tui_command, set_tui_cmd, show_tui_cmd): Constify. * skip.c (skip_command): Constify. * compile/compile.c (_initialize_compile): Constify. * dwarf2read.c (set_dwarf_cmd, show_dwarf_cmd): Constify. * btrace.c (maint_btrace_cmd, maint_btrace_set_cmd) (maint_btrace_show_cmd, maint_btrace_pt_set_cmd) (maint_btrace_pt_show_cmd): Constify. * remote.c (set_remote_cmd, show_remote_cmd, remote_command): Constify. * python/python.c (user_show_python, user_set_python): Constify. * mips-tdep.c (set_mips_command, show_mips_command) (set_mipsfpu_command): Constify. * record-btrace.c (cmd_record_btrace_start) (cmd_set_record_btrace, cmd_show_record_btrace) (cmd_set_record_btrace_bts, cmd_show_record_btrace_bts) (cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): Constify. * rs6000-tdep.c (set_powerpc_command, show_powerpc_command): Constify. * symfile.c (overlay_command): Constify. * spu-tdep.c (set_spu_command, show_spu_command): Constify. * cli/cli-logging.c (set_logging_command, show_logging_command): Constify. * cli/cli-dump.c (dump_command, append_command) (srec_dump_command, ihex_dump_command, verilog_dump_command) (tekhex_dump_command, binary_dump_command) (binary_append_command): Constify. * cli/cli-decode.c (struct cmd_list_element): Change type of "fun". * cli/cli-cmds.c (info_command, show_command, set_debug) (show_debug): Constify. (show_command): Add non-const overload. * top.c (set_history, show_history): Constify. * sh-tdep.c (set_sh_command, show_sh_command): Constify. * command.h (add_prefix_cmd): Accept a cmd_const_cfunc_ftype. * target.c (target_command): Constify. * sparc64-tdep.c (info_adi_command): Constify. * record-full.c (cmd_record_full_start): Constify. (set_record_full_command): Constify. Fix typo. (show_record_full_command): Constify. * thread.c (thread_command, thread_apply_command): Constify. * memattr.c (dummy_cmd): Constify. * value.c (function_command): Constify. * frame.c (set_backtrace_cmd, show_backtrace_cmd): Constify. * probe.c (info_probes_command): Constify. * ser-tcp.c (set_tcp_cmd, show_tcp_cmd): Constify. * gnu-nat.c (set_task_cmd, show_task_cmd, set_thread_cmd) (show_thread_cmd, set_thread_default_cmd) (show_thread_default_cmd): Constify. (check_empty): Constify. * tracepoint.c (tfind_command): Constify. * cp-support.c (maint_cplus_command): Constify. * windows-tdep.c (info_w32_command): Constify. * record.c (cmd_record_start, set_record_command) (show_record_command, info_record_command, cmd_record_goto): Constify. * ravenscar-thread.c (set_ravenscar_command) (show_ravenscar_command): Constify. * utils.c (set_internal_problem_cmd, show_internal_problem_cmd): Constify. (add_internal_problem_command): Remove casts. * arc-tdep.c (maintenance_print_arc_command): Constify. * valprint.c (set_print, show_print, set_print_raw) (show_print_raw): Constify. * maint.c (maintenance_command, maintenance_info_command) (maintenance_print_command, maintenance_set_cmd) (maintenance_show_cmd, set_per_command_cmd) (show_per_command_cmd, maintenance_check_command): Constify. * language.c (set_check, show_check): Constify. * typeprint.c (show_print_type, set_print_type): Constify. * go32-nat.c (go32_info_dos_command): Constify.
2017-09-26 06:28:30 +02:00
set_ravenscar_command (const char *arg, int from_tty)
{
printf_unfiltered (_(\
"\"set ravenscar\" must be followed by the name of a setting.\n"));
make calls to help_list use enumerator Currently there are many calls to help_list that pass the constant -1 as the "class" value. However, the parameter is declared as being of type enum command_class, and uses of the constant violate this abstraction. This patch fixes the error everywhere it occurs in the gdb sources. Tested by rebuilding. 2014-06-13 Tom Tromey <tromey@redhat.com> * cp-support.c (maint_cplus_command): Pass all_commands, not -1, to help_list. * guile/guile.c (info_guile_command): Pass all_commands, not -1, to help_list. * tui/tui-win.c (tui_command): Pass all_commands, not -1, to help_list. * tui/tui-regs.c (tui_reg_command): Pass all_commands, not -1, to help_list.Pass all_commands, not -1, to help_list. * cli/cli-dump.c (dump_command, append_command) (srec_dump_command, ihex_dump_command, tekhex_dump_command) (binary_dump_command, binary_append_command): Pass all_commands, not -1, to help_list. * cli/cli-cmds.c (info_command, set_debug): Pass all_commands, not -1, to help_list. * valprint.c (set_print, set_print_raw): Pass all_commands, not -1, to help_list. * typeprint.c (set_print_type): Pass all_commands, not -1, to help_list. * top.c (set_history): Pass all_commands, not -1, to help_list. * target-descriptions.c (set_tdesc_cmd, unset_tdesc_cmd): Pass all_commands, not -1, to help_list. * symfile.c (overlay_command): Pass all_commands, not -1, to help_list. * spu-tdep.c (info_spu_command): Pass all_commands, not -1, to help_list. * serial.c (serial_set_cmd): Pass all_commands, not -1, to help_list. * ser-tcp.c (set_tcp_cmd, show_tcp_cmd): Pass all_commands, not -1, to help_list. * remote.c (remote_command, set_remote_cmd): Pass all_commands, not -1, to help_list. * ravenscar-thread.c (set_ravenscar_command): Pass all_commands, not -1, to help_list. * maint.c (maintenance_command, maintenance_info_command) (maintenance_print_command, maintenance_set_cmd): Pass all_commands, not -1, to help_list. * macrocmd.c (macro_command): Pass all_commands, not -1, to help_list. * language.c (set_check): Pass all_commands, not -1, to help_list. * infcmd.c (unset_command): Pass all_commands, not -1, to help_list. * frame.c (set_backtrace_cmd): Pass all_commands, not -1, to help_list. * dwarf2read.c (set_dwarf2_cmd): Pass all_commands, not -1, to help_list. * dcache.c (set_dcache_command): Pass all_commands, not -1, to help_list. * breakpoint.c (save_command): Pass all_commands, not -1, to help_list. * ada-lang.c (maint_set_ada_cmd, set_ada_command): Pass all_commands, not -1, to help_list.
2014-06-05 16:25:00 +02:00
help_list (set_ravenscar_list, "set ravenscar ", all_commands, gdb_stdout);
}
/* Implement the "show ravenscar" prefix command. */
static void
Constify add_prefix_cmd This changes add_prefix_cmd to accept a const-taking function as an argument; then fixes up all the callers. In a couple of spots I had to add a non-const overload of a function, because the function is passed to two different command-adding "constructors". These overloads are temporary; once constification is complete they can be removed. This patch also fixes a typo I happened to notice while constifying. Note that this touches a couple of files (gnu-nat.c and go32-nat.c) that I can't build. So, while I made a best-effort there, I am not certain they will still compile. Tested by rebuilding. gdb/ChangeLog 2017-10-11 Tom Tromey <tom@tromey.com> * gdbthread.h (thread_command): Constify. * inferior.h (detach_command): Constify. * top.h (set_history, show_history): Constify. * arm-tdep.c (set_arm_command, show_arm_command): Constify. * serial.c (serial_set_cmd, serial_show_cmd): Constify. * bsd-kvm.c (bsd_kvm_cmd): Constify. * printcmd.c (set_command): Constify. (non_const_set_command): New function. * dcache.c (set_dcache_command, show_dcache_command): Constify. * breakpoint.c (enable_command, disable_command, delete_command) (catch_command, tcatch_command, set_breakpoint_cmd) (show_breakpoint_cmd): Constify. * macrocmd.c (macro_command): Constify. * infcmd.c (unset_command, kill_command, detach_command) (info_proc_cmd): Constify. * i386-tdep.c (set_mpx_cmd, show_mpx_cmd): Constify. * auto-load.c (show_auto_load_cmd, set_auto_load_cmd) (info_auto_load_cmd): Constify. * target-descriptions.c (set_tdesc_cmd, show_tdesc_cmd) (unset_tdesc_cmd): Constify. * ada-lang.c (set_ada_command, show_ada_command) (maint_set_ada_cmd, maint_show_ada_cmd): Constify. * guile/guile.c (set_guile_command, show_guile_command) (info_guile_command): Constify. * tui/tui-win.c (tui_command, set_tui_cmd, show_tui_cmd): Constify. * skip.c (skip_command): Constify. * compile/compile.c (_initialize_compile): Constify. * dwarf2read.c (set_dwarf_cmd, show_dwarf_cmd): Constify. * btrace.c (maint_btrace_cmd, maint_btrace_set_cmd) (maint_btrace_show_cmd, maint_btrace_pt_set_cmd) (maint_btrace_pt_show_cmd): Constify. * remote.c (set_remote_cmd, show_remote_cmd, remote_command): Constify. * python/python.c (user_show_python, user_set_python): Constify. * mips-tdep.c (set_mips_command, show_mips_command) (set_mipsfpu_command): Constify. * record-btrace.c (cmd_record_btrace_start) (cmd_set_record_btrace, cmd_show_record_btrace) (cmd_set_record_btrace_bts, cmd_show_record_btrace_bts) (cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): Constify. * rs6000-tdep.c (set_powerpc_command, show_powerpc_command): Constify. * symfile.c (overlay_command): Constify. * spu-tdep.c (set_spu_command, show_spu_command): Constify. * cli/cli-logging.c (set_logging_command, show_logging_command): Constify. * cli/cli-dump.c (dump_command, append_command) (srec_dump_command, ihex_dump_command, verilog_dump_command) (tekhex_dump_command, binary_dump_command) (binary_append_command): Constify. * cli/cli-decode.c (struct cmd_list_element): Change type of "fun". * cli/cli-cmds.c (info_command, show_command, set_debug) (show_debug): Constify. (show_command): Add non-const overload. * top.c (set_history, show_history): Constify. * sh-tdep.c (set_sh_command, show_sh_command): Constify. * command.h (add_prefix_cmd): Accept a cmd_const_cfunc_ftype. * target.c (target_command): Constify. * sparc64-tdep.c (info_adi_command): Constify. * record-full.c (cmd_record_full_start): Constify. (set_record_full_command): Constify. Fix typo. (show_record_full_command): Constify. * thread.c (thread_command, thread_apply_command): Constify. * memattr.c (dummy_cmd): Constify. * value.c (function_command): Constify. * frame.c (set_backtrace_cmd, show_backtrace_cmd): Constify. * probe.c (info_probes_command): Constify. * ser-tcp.c (set_tcp_cmd, show_tcp_cmd): Constify. * gnu-nat.c (set_task_cmd, show_task_cmd, set_thread_cmd) (show_thread_cmd, set_thread_default_cmd) (show_thread_default_cmd): Constify. (check_empty): Constify. * tracepoint.c (tfind_command): Constify. * cp-support.c (maint_cplus_command): Constify. * windows-tdep.c (info_w32_command): Constify. * record.c (cmd_record_start, set_record_command) (show_record_command, info_record_command, cmd_record_goto): Constify. * ravenscar-thread.c (set_ravenscar_command) (show_ravenscar_command): Constify. * utils.c (set_internal_problem_cmd, show_internal_problem_cmd): Constify. (add_internal_problem_command): Remove casts. * arc-tdep.c (maintenance_print_arc_command): Constify. * valprint.c (set_print, show_print, set_print_raw) (show_print_raw): Constify. * maint.c (maintenance_command, maintenance_info_command) (maintenance_print_command, maintenance_set_cmd) (maintenance_show_cmd, set_per_command_cmd) (show_per_command_cmd, maintenance_check_command): Constify. * language.c (set_check, show_check): Constify. * typeprint.c (show_print_type, set_print_type): Constify. * go32-nat.c (go32_info_dos_command): Constify.
2017-09-26 06:28:30 +02:00
show_ravenscar_command (const char *args, int from_tty)
{
cmd_show_list (show_ravenscar_list, from_tty, "");
}
/* Implement the "show ravenscar task-switching" command. */
static void
show_ravenscar_task_switching_command (struct ui_file *file, int from_tty,
struct cmd_list_element *c,
const char *value)
{
if (ravenscar_task_support)
fprintf_filtered (file, _("\
Support for Ravenscar task/thread switching is enabled\n"));
else
fprintf_filtered (file, _("\
Support for Ravenscar task/thread switching is disabled\n"));
}
/* Module startup initialization function, automagically called by
init.c. */
void
_initialize_ravenscar (void)
{
init_ravenscar_thread_ops ();
base_ptid = null_ptid;
/* Notice when the inferior is created in order to push the
ravenscar ops if needed. */
Convert observers to C++ This converts observers from using a special source-generating script to be plain C++. This version of the patch takes advantage of C++11 by using std::function and variadic templates; incorporates Pedro's patches; and renames the header file to "observable.h" (this change eliminates the need for a clean rebuild). Note that Pedro's patches used a template lambda in tui-hooks.c, but this failed to compile on some buildbot instances (presumably due to differing C++ versions); I replaced this with an ordinary template function. Regression tested on the buildbot. gdb/ChangeLog 2018-03-19 Pedro Alves <palves@redhat.com> Tom Tromey <tom@tromey.com> * unittests/observable-selftests.c: New file. * common/observable.h: New file. * observable.h: New file. * ada-lang.c, ada-tasks.c, agent.c, aix-thread.c, annotate.c, arm-tdep.c, auto-load.c, auxv.c, break-catch-syscall.c, breakpoint.c, bsd-uthread.c, cli/cli-interp.c, cli/cli-setshow.c, corefile.c, dummy-frame.c, event-loop.c, event-top.c, exec.c, extension.c, frame.c, gdbarch.c, guile/scm-breakpoint.c, infcall.c, infcmd.c, inferior.c, inflow.c, infrun.c, jit.c, linux-tdep.c, linux-thread-db.c, m68klinux-tdep.c, mi/mi-cmd-break.c, mi/mi-interp.c, mi/mi-main.c, objfiles.c, ppc-linux-nat.c, ppc-linux-tdep.c, printcmd.c, procfs.c, python/py-breakpoint.c, python/py-finishbreakpoint.c, python/py-inferior.c, python/py-unwind.c, ravenscar-thread.c, record-btrace.c, record-full.c, record.c, regcache.c, remote.c, riscv-tdep.c, sol-thread.c, solib-aix.c, solib-spu.c, solib.c, spu-multiarch.c, spu-tdep.c, stack.c, symfile-mem.c, symfile.c, symtab.c, thread.c, top.c, tracepoint.c, tui/tui-hooks.c, tui/tui-interp.c, valops.c: Update all users. * tui/tui-hooks.c (tui_bp_created_observer) (tui_bp_deleted_observer, tui_bp_modified_observer) (tui_inferior_exit_observer, tui_before_prompt_observer) (tui_normal_stop_observer, tui_register_changed_observer): Remove. (tui_observers_token): New global. (attach_or_detach, tui_attach_detach_observers): New functions. (tui_install_hooks, tui_remove_hooks): Use tui_attach_detach_observers. * record-btrace.c (record_btrace_thread_observer): Remove. (record_btrace_thread_observer_token): New global. * observer.sh: Remove. * observer.c: Rename to observable.c. * observable.c (namespace gdb_observers): Define new objects. (observer_debug): Move into gdb_observers namespace. (struct observer, struct observer_list, xalloc_observer_list_node) (xfree_observer_list_node, generic_observer_attach) (generic_observer_detach, generic_observer_notify): Remove. (_initialize_observer): Update. Don't include observer.inc. * Makefile.in (generated_files): Remove observer.h, observer.inc. (clean mostlyclean): Likewise. (observer.h, observer.inc): Remove targets. (SUBDIR_UNITTESTS_SRCS): Add observable-selftests.c. (COMMON_SFILES): Use observable.c, not observer.c. * .gitignore: Remove observer.h. gdb/doc/ChangeLog 2018-03-19 Tom Tromey <tom@tromey.com> * observer.texi: Remove. gdb/testsuite/ChangeLog 2018-03-19 Tom Tromey <tom@tromey.com> * gdb.gdb/observer.exp: Remove.
2016-10-02 18:50:20 +02:00
gdb::observers::inferior_created.attach (ravenscar_inferior_created);
complete_target_initialization (&ravenscar_ops);
add_prefix_cmd ("ravenscar", no_class, set_ravenscar_command,
_("Prefix command for changing Ravenscar-specific settings"),
&set_ravenscar_list, "set ravenscar ", 0, &setlist);
add_prefix_cmd ("ravenscar", no_class, show_ravenscar_command,
_("Prefix command for showing Ravenscar-specific settings"),
&show_ravenscar_list, "show ravenscar ", 0, &showlist);
add_setshow_boolean_cmd ("task-switching", class_obscure,
&ravenscar_task_support, _("\
Enable or disable support for GNAT Ravenscar tasks"), _("\
Show whether support for GNAT Ravenscar tasks is enabled"),
_("\
Enable or disable support for task/thread switching with the GNAT\n\
Ravenscar run-time library for bareboard configuration."),
NULL, show_ravenscar_task_switching_command,
&set_ravenscar_list, &show_ravenscar_list);
}