Leak fixed in '8e6a5953e1d Fix 4K leak in open_source_file' has been partially
undone by '2179fbc36d23 Return scoped_fd from open_source_file'. Re-add the
transfer of current s->fullname to the unique_xmalloc_ptr fullname given to
find_and_open_source.
The cannot store/fetch register functions are only used for checking
if a register can be accessed using PEEKUSER/POKEUSER.
The AArch64 port doesn't support this method of access, so remove the
unused functions.
gdb/gdbserver:
* linux-aarch64-low.c (aarch64_cannot_store_register): Remove.
(aarch64_cannot_fetch_register): Likewise.
(struct linux_target_ops): Update references.
The recent commit 0803633106 ("Per-inferior thread list, thread
ranges/iterators, down with ALL_THREADS, etc.") removed the
definitions of is_running/is_stopped/is_exited but missed removing the
declarations.
gdb/ChangeLog:
2018-11-23 Pedro Alves <palves@redhat.com>
* gdbthread.h (enum thread_state): Move comments here.
(is_running, is_stopped, is_exited): Remove declarations.
As preparation for multi-target, this patch makes each inferior have
its own thread list.
This isn't absolutely necessary for multi-target, but simplifies
things. It originally stemmed from the desire to eliminate the
init_thread_list calls sprinkled around, plus it makes it more
efficient to iterate over threads of a given inferior (no need to
always iterate over threads of all inferiors).
We still need to iterate over threads of all inferiors in a number of
places, which means we'd need adjust the ALL_THREADS /
ALL_NON_EXITED_THREADS macros. However, naively tweaking those macros
to have an extra for loop, like:
#define ALL_THREADS (thr, inf) \
for (inf = inferior_list; inf; inf = inf->next) \
for (thr = inf->thread_list; thr; thr = thr->next)
causes problems with code that does "break" or "continue" within the
ALL_THREADS loop body. Plus, we need to declare the extra "inf" local
variable in order to pass it as temporary variable to ALL_THREADS
(etc.)
It gets even trickier when we consider extending the macros to filter
out threads matching a ptid_t and a target. The macros become tricker
to read/write. Been there.
An alternative (which was my next attempt), is to replace the
ALL_THREADS etc. iteration style with for_each_all_threads,
for_each_non_exited_threads, etc. functions which would take a
callback as parameter, which would usually be passed a lambda.
However, I did not find that satisfactory at all, because the
resulting code ends up a little less natural / more noisy to read,
write and debug/step-through (due to use of lambdas), and in many
places where we use "continue;" to skip to the next thread now need to
use "return;". (I ran into hard to debug bugs caused by a
continue/return confusion.)
I.e., before:
ALL_NON_EXITED_THREADS (tp)
{
if (tp->not_what_I_want)
continue;
// do something
}
would turn into:
for_each_non_exited_thread ([&] (thread_info *tp)
{
if (tp->not_what_I_want)
return;
// do something
});
Lastly, the solution I settled with was to replace the ALL_THREADS /
ALL_NON_EXITED_THREADS / ALL_INFERIORS macros with (C++20-like) ranges
and iterators, such that you can instead naturaly iterate over
threads/inferiors using range-for, like e.g,.:
// all threads, including THREAD_EXITED threads.
for (thread_info *tp : all_threads ())
{ .... }
// all non-exited threads.
for (thread_info *tp : all_non_exited_threads ())
{ .... }
// all non-exited threads of INF inferior.
for (thread_info *tp : inf->non_exited_threads ())
{ .... }
The all_non_exited_threads() function takes an optional filter ptid_t as
parameter, which is quite convenient when we need to iterate over
threads matching that filter. See e.g., how the
set_executing/set_stop_requested/finish_thread_state etc. functions in
thread.c end up being simplified.
Most of the patch thus is about adding the infrustructure for allowing
the above. Later on when we get to actual multi-target, these
functions/ranges/iterators will gain a "target_ops *" parameter so
that e.g., we can iterate over all threads of a given target that
match a given filter ptid_t.
The only entry points users needs to be aware of are the
all_threads/all_non_exited_threads etc. functions seen above. Thus,
those functions are declared in gdbthread.h/inferior.h. The actual
iterators/ranges are mainly "internals" and thus are put out of view
in the new thread-iter.h/thread-iter.c/inferior-iter.h files. That
keeps the gdbthread.h/inferior.h headers quite a bit more readable.
A common/safe-iterator.h header is added which adds a template that
can be used to build "safe" iterators, which are forward iterators
that can be used to replace the ALL_THREADS_SAFE macro and other
instances of the same idiom in future.
There's a little bit of shuffling of code between
gdbthread.h/thread.c/inferior.h in the patch. That is necessary in
order to avoid circular dependencies between the
gdbthread.h/inferior.h headers.
As for the init_thread_list calls sprinkled around, they're all
eliminated by this patch, and a new, central call is added to
inferior_appeared. Note how also related to that, there's a call to
init_wait_for_inferior in remote.c that is eliminated.
init_wait_for_inferior is currently responsible for discarding skipped
inline frames, which had to be moved elsewhere. Given that nowadays
we always have a thread even for single-threaded processes, the
natural place is to delete a frame's inline frame info when we delete
the thread. I.e., from clear_thread_inferior_resources.
gdb/ChangeLog:
2018-11-22 Pedro Alves <palves@redhat.com>
* Makefile.in (COMMON_SFILES): Add thread-iter.c.
* breakpoint.c (breakpoints_should_be_inserted_now): Replace
ALL_NON_EXITED_THREADS with all_non_exited_threads.
(print_one_breakpoint_location): Replace ALL_INFERIORS with
all_inferiors.
* bsd-kvm.c: Include inferior.h.
* btrace.c (btrace_free_objfile): Replace ALL_NON_EXITED_THREADS
with all_non_exited_threads.
* common/filtered-iterator.h: New.
* common/safe-iterator.h: New.
* corelow.c (core_target_open): Don't call init_thread_list here.
* darwin-nat.c (thread_info_from_private_thread_info): Replace
ALL_THREADS with all_threads.
* fbsd-nat.c (fbsd_nat_target::resume): Replace
ALL_NON_EXITED_THREADS with inf->non_exited_threads.
* fbsd-tdep.c (fbsd_make_corefile_notes): Replace
ALL_NON_EXITED_THREADS with inf->non_exited_threads.
* fork-child.c (postfork_hook): Don't call init_thread_list here.
* gdbarch-selftests.c (register_to_value_test): Adjust.
* gdbthread.h: Don't include "inferior.h" here.
(struct inferior): Forward declare.
(enum step_over_calls_kind): Moved here from inferior.h.
(thread_info::deletable): Definition moved to thread.c.
(find_thread_ptid (inferior *, ptid_t)): Declare.
(ALL_THREADS, ALL_THREADS_BY_INFERIOR, ALL_THREADS_SAFE): Delete.
Include "thread-iter.h".
(all_threads, all_non_exited_threads, all_threads_safe): New.
(any_thread_p): Declare.
(thread_list): Delete.
* infcmd.c (signal_command): Replace ALL_NON_EXITED_THREADS with
all_non_exited_threads.
(proceed_after_attach_callback): Delete.
(proceed_after_attach): Take an inferior pointer instead of an
integer PID. Adjust to use range-for.
(attach_post_wait): Pass down inferior pointer instead of pid.
Use range-for instead of ALL_NON_EXITED_THREADS.
(detach_command): Remove init_thread_list call.
* inferior-iter.h: New.
* inferior.c (struct delete_thread_of_inferior_arg): Delete.
(delete_thread_of_inferior): Delete.
(delete_inferior, exit_inferior_1): Use range-for with
inf->threads_safe() instead of iterate_over_threads.
(inferior_appeared): Call init_thread_list here.
(discard_all_inferiors): Use all_non_exited_inferiors.
(find_inferior_id, find_inferior_pid): Use all_inferiors.
(iterate_over_inferiors): Use all_inferiors_safe.
(have_inferiors, number_of_live_inferiors): Use
all_non_exited_inferiors.
(number_of_inferiors): Use all_inferiors and std::distance.
(print_inferior): Use all_inferiors.
* inferior.h: Include gdbthread.h.
(enum step_over_calls_kind): Moved to gdbthread.h.
(struct inferior) <thread_list>: New field.
<threads, non_exited_threads, threads_safe>: New methods.
(ALL_INFERIORS): Delete.
Include "inferior-iter.h".
(ALL_NON_EXITED_INFERIORS): Delete.
(all_inferiors_safe, all_inferiors, all_non_exited_inferiors): New
functions.
* inflow.c (child_interrupt, child_pass_ctrlc): Replace
ALL_NON_EXITED_THREADS with all_non_exited_threads.
* infrun.c (follow_exec): Use all_threads_safe.
(clear_proceed_status, proceed): Use all_non_exited_threads.
(init_wait_for_inferior): Don't clear inline frame state here.
(infrun_thread_stop_requested, for_each_just_stopped_thread): Use
all_threads instead of ALL_NON_EXITED_THREADS.
(random_pending_event_thread): Use all_non_exited_threads instead
of ALL_NON_EXITED_THREADS. Use a lambda for repeated code.
(clean_up_just_stopped_threads_fsms): Use all_non_exited_threads
instead of ALL_NON_EXITED_THREADS.
(handle_no_resumed): Use all_non_exited_threads instead of
ALL_NON_EXITED_THREADS. Use all_inferiors instead of
ALL_INFERIORS.
(restart_threads, switch_back_to_stepped_thread): Use
all_non_exited_threads instead of ALL_NON_EXITED_THREADS.
* linux-nat.c (check_zombie_leaders): Replace ALL_INFERIORS with
all_inferiors.
(kill_unfollowed_fork_children): Use inf->non_exited_threads
instead of ALL_NON_EXITED_THREADS.
* linux-tdep.c (linux_make_corefile_notes): Use
inf->non_exited_threads instead of ALL_NON_EXITED_THREADS.
* linux-thread-db.c (thread_db_target::update_thread_list):
Replace ALL_INFERIORS with all_inferiors.
(thread_db_target::thread_handle_to_thread_info): Use
inf->non_exited_threads instead of ALL_NON_EXITED_THREADS.
* mi/mi-interp.c (multiple_inferiors_p): New.
(mi_on_resume_1): Simplify using all_non_exited_threads and
multiple_inferiors_p.
* mi/mi-main.c (mi_cmd_thread_list_ids): Use all_non_exited_threads
instead of ALL_NON_EXITED_THREADS.
* nto-procfs.c (nto_procfs_target::open): Don't call
init_thread_list here.
* record-btrace.c (record_btrace_target_open)
(record_btrace_target::stop_recording)
(record_btrace_target::close)
(record_btrace_target::record_is_replaying)
(record_btrace_target::resume, record_btrace_target::wait)
(record_btrace_target::record_stop_replaying): Use
all_non_exited_threads instead of ALL_NON_EXITED_THREADS.
* record-full.c (record_full_wait_1): Use all_non_exited_threads
instead of ALL_NON_EXITED_THREADS.
* regcache.c (cooked_read_test): Remove reference to global
thread_list.
* remote-sim.c (gdbsim_target::create_inferior): Don't call
init_thread_list here.
* remote.c (remote_target::update_thread_list): Use
all_threads_safe instead of ALL_NON_EXITED_THREADS.
(remote_target::process_initial_stop_replies): Replace
ALL_INFERIORS with all_non_exited_inferiors and use
all_non_exited_threads instead of ALL_NON_EXITED_THREADS.
(remote_target::open_1): Don't call init_thread_list here.
(remote_target::append_pending_thread_resumptions)
(remote_target::remote_resume_with_hc): Use all_non_exited_threads
instead of ALL_NON_EXITED_THREADS.
(remote_target::commit_resume)
(remote_target::remove_new_fork_children): Replace ALL_INFERIORS
with all_non_exited_inferiors and use all_non_exited_threads
instead of ALL_NON_EXITED_THREADS.
(remote_target::kill_new_fork_children): Use
all_non_exited_threads instead of ALL_NON_EXITED_THREADS. Remove
init_thread_list and init_wait_for_inferior calls.
(remote_target::remote_btrace_maybe_reopen)
(remote_target::thread_handle_to_thread_info): Use
all_non_exited_threads instead of ALL_NON_EXITED_THREADS.
* target.c (target_terminal::restore_inferior)
(target_terminal_is_ours_kind): Replace ALL_INFERIORS with
all_non_exited_inferiors.
* thread-iter.c: New file.
* thread-iter.h: New file.
* thread.c: Include "inline-frame.h".
(thread_list): Delete.
(clear_thread_inferior_resources): Call clear_inline_frame_state.
(init_thread_list): Use all_threads_safe instead of
ALL_THREADS_SAFE. Adjust to per-inferior thread lists.
(new_thread): Adjust to per-inferior thread lists.
(add_thread_silent): Pass inferior to find_thread_ptid.
(thread_info::deletable): New, moved from the header.
(delete_thread_1): Adjust to per-inferior thread lists.
(find_thread_global_id): Use inf->threads().
(find_thread_ptid): Use find_inferior_ptid and pass inferior to
find_thread_ptid.
(find_thread_ptid(inferior*, ptid_t)): New overload.
(iterate_over_threads): Use all_threads_safe.
(any_thread_p): New.
(thread_count): Use all_threads and std::distance.
(live_threads_count): Use all_non_exited_threads and
std::distance.
(valid_global_thread_id): Use all_threads.
(in_thread_list): Use find_thread_ptid.
(first_thread_of_inferior): Adjust to per-inferior thread lists.
(any_thread_of_inferior, any_live_thread_of_inferior): Use
inf->non_exited_threads().
(prune_threads, delete_exited_threads): Use all_threads_safe.
(thread_change_ptid): Pass inferior pointer to find_thread_ptid.
(set_resumed, set_running): Use all_non_exited_threads.
(is_thread_state, is_stopped, is_exited, is_running)
(is_executing): Delete.
(set_executing, set_stop_requested, finish_thread_state): Use
all_non_exited_threads.
(print_thread_info_1): Use all_inferiors and all_threads.
(thread_apply_all_command): Use all_non_exited_threads.
(thread_find_command): Use all_threads.
(update_threads_executing): Use all_non_exited_threads.
* tid-parse.c (parse_thread_id): Use inf->threads.
* x86-bsd-nat.c (x86bsd_dr_set): Use inf->non_exited_threads ().
A following commit to make each inferior have its own thread list
exposes a problem with bf93d7ba99 ("Add thread after updating gdbarch
when exec'ing"), which is that we can't defer adding the thread
because that breaks try_open_exec_file which deep inside ends up
calling inferior_thread():
#5 0x0000000000637c78 in internal_error(char const*, int, char const*, ...) (file=0xc151f8 "src/gdb/thread.c", line=165, fmt=0xc15180 "%s: Assertion `%s' failed.") at src/gdb/common/errors.c:55
#6 0x00000000008a3d80 in inferior_thread() () at src/gdb/thread.c:165
#7 0x0000000000456f91 in try_thread_db_load_1(thread_db_info*) (info=0x277eb00) at src/gdb/linux-thread-db.c:830
#8 0x0000000000457554 in try_thread_db_load(char const*, int) (library=0xb01a4f "libthread_db.so.1", check_auto_load_safe=0)
at src/gdb/linux-thread-db.c:1002
#9 0x0000000000457861 in try_thread_db_load_from_sdir() () at src/gdb/linux-thread-db.c:1079
#10 0x0000000000457b72 in thread_db_load_search() () at src/gdb/linux-thread-db.c:1134
#11 0x0000000000457d29 in thread_db_load() () at src/gdb/linux-thread-db.c:1192
#12 0x0000000000457e51 in check_for_thread_db() () at src/gdb/linux-thread-db.c:1244
#13 0x0000000000457ed2 in thread_db_new_objfile(objfile*) (objfile=0x270ff60) at src/gdb/linux-thread-db.c:1273
#14 0x000000000045a92e in std::_Function_handler<void (objfile*), void (*)(objfile*)>::_M_invoke(std::_Any_data const&, objfile*&&) (__functor=..., __args#0=@0x7ffef3efe140: 0x270ff60) at /usr/include/c++/7/bits/std_function.h:316
#15 0x00000000007bbebf in std::function<void (objfile*)>::operator()(objfile*) const (this=0x24e1d18, __args#0=0x270ff60)
at /usr/include/c++/7/bits/std_function.h:706
#16 0x00000000007bba86 in gdb::observers::observable<objfile*>::notify(objfile*) const (this=0x117ce80 <gdb::observers::new_objfile>, args#0=0x270ff60) at src/gdb/common/observable.h:106
#17 0x0000000000856000 in symbol_file_add_with_addrs(bfd*, char const*, symfile_add_flags, section_addr_info*, objfile_flags, objfile*) (abfd=0x1d7dae0, name=0x254bfc0 "/ho
The problem is latent currently because inferior_thread() at that
point manages to return a thread, even though it's the wrong one (of
the old inferior).
The problem originally fixed by bf93d7ba99 was:
(...) we should avoid doing register reads
after a process does an exec and before we've updated that inferior's
gdbarch. Otherwise, we may interpret the registers using the wrong
architecture.
(...) The call to "add_thread" done just after adding the inferior is
problematic, because it ends up reading the registers (because the ptid
is re-used, we end up doing a switch_to_thread to it, which tries to
update stop_pc). (...)
The register-reading issue is no longer a problem nowadays, ever since
switch_to_thread stopped reading the stop_pc in git commit
f2ffa92bbc ("gdb: Eliminate the 'stop_pc' global").
So this commit basically reverts bf93d7ba99.
gdb/ChangeLog:
2018-11-22 Pedro Alves <palves@redhat.com>
* infrun.c (follow_exec) <set follow-exec new>: Add thread and
switch to it before calling into try_open_exec_file.
With a following patch, find_thread_ptid will first find the inferior
for the passed-in ptid, using find_inferior_pid, and then look for the
thread in that inferior's thread list. If we pass down null_ptid to
find_thread_ptid then that means we'll end up passing 0 to
find_inferior_pid, which hits this assertion:
> struct inferior *
> find_inferior_pid (int pid)
> {
> struct inferior *inf;
>
> /* Looking for inferior pid == 0 is always wrong, and indicative of
> a bug somewhere else. There may be more than one with pid == 0,
> for instance. */
> gdb_assert (pid != 0);
This patch prepares for the change, by avoiding passing down null_ptid
to find_thread_ptid or to functions that naturally use it, such as the
target_pid_to_str call in inferior.c:add_inferior. In that latter
case, the patch changes GDB output,
from:
(gdb) add-inferior
[New inferior 2 (process 0)]
to:
(gdb) add-inferior
[New inferior 2]
which seems like a good change to me. It might not even make sense to
talk about "process" for the current target, for example.
The python_on_normal_stop change ends up avoiding looking up the
same thread twice (inferior_thread also does a look up).
gdb/ChangeLog:
2018-11-22 Pedro Alves <palves@redhat.com>
* cli/cli-interp.c (cli_on_user_selected_context_changed): Use
inferior_thread instead of find_thread_ptid, and only when
inferior_ptid is not null_ptid.
* inferior.c (add_inferior): Don't include target_pid_to_str
output when the inferior is not started.
* python/py-inferior.c (python_on_normal_stop): Don't use
find_thread_ptid.
(tui_on_user_selected_context_changed): Use inferior_thread
instead of find_thread_ptid, and only when inferior_ptid is not
null_ptid.
Shift and rotate instructions when the number of bit positions
was an immediate value greater than 1 were incorrectly disassembled.
This change fixes that problem and extends the test to check for
it.
gas/ChangeLog:
testsuite/gas/s12z/shift.s: Add new test case.
testsuite/gas/s12z/shift.d: Add expected result.
opcodes/ChangeLog:
s12z-dis.c (print_insn_shift) [SB_REG_REG_N]: Enter special case
if the postbyte matches the appropriate pattern.
These are documented by NXP as alternative mnemonics for BCC and BCS
respectively.
gas/ChangeLog:
* config/tc-s12z.c (opcodes): bhs, blo: New members.
* testsuite/gas/s12z/bra.d: Add tests for aliases.
* testsuite/gas/s12z/bra.s: Add tests for aliases.
Since commit
56bcdbea2b ("Let gdb.execute handle multi-line commands")
command repetition after using the `gdb.execute` Python function
fails (the previous command is not repeated anymore). This happens
because read_command_lines_1 sets dont_repeat, but the call to
prevent_dont_repeat in execute_gdb_command is later.
The fix is to move the call to prevent_dont_repeat to the beginning of
the function.
Tested on my laptop (ArchLinux-x86_64).
gdb/ChangeLog:
PR python/23714
* gdb/python/python.c (execute_gdb_command): Call
prevent_dont_repeat earlier to avoid affecting dont_repeat.
gdb/testuite/ChangeLog:
PR python/23714
* gdb.python/python.exp: Test command repetition after
gdb.execute.
When invoking GCC with "-g -flto", the compiler will create LTO objects
with debug information. The objects created are "simple ELF" objects (see
libiberty/simple-object-elf.c) and do not have target-specific sections.
When the MSP430 linker sees one of these objects without a .MSP430.attributes
section it errors:
> error: /tmp/cc4LhbEI.ltrans0.ltrans.o uses MSP430X instructions but /tmp/ccynqIwudebugobj uses unknown
> error: /tmp/cc4LhbEI.ltrans0.ltrans.o uses the small code model whereas /tmp/ccynqIwudebugobj uses the unknown code model
> error: /tmp/cc4LhbEI.ltrans0.ltrans.o uses the small data model whereas /tmp/ccynqIwudebugobj uses the unknown data model
> error: /tmp/cc4LhbEI.ltrans0.ltrans.o uses the small code model but /tmp/ccynqIwudebugobj uses the unknown data model
> failed to merge target specific data of file /tmp/cc4LhbEI.ltrans0.ltrans.o
The following patch allows these debug LTO objects to be linked with other
MSP430 objects even if they do not have a .MSP430.attributes section.
bfd * elf32-msp430.c (elf32_msp430_merge_mspabi_attributes): Do not
error when .MSP430.attributes section is missing from objects
created by LTO.
This commit adds target description support for riscv.
I've used the split feature approach for specifying the architectural
features, and the CSR feature is auto-generated from the riscv-opc.h
header file.
If the target doesn't provide a suitable target description then GDB
will build one by looking at the bfd headers.
This commit does not implement target description creation for the
Linux or FreeBSD native targets, both of these will need to add
read_description methods into their respective target classes, which
probe the target features, and then call
riscv_create_target_description to build a suitable target
description. Until this is done Linux and FreeBSD will get the same
default target description based on the bfd that bare-metal targets
get.
I've only added feature descriptions for 32 and 64 bit registers, 128
bit registers (for RISC-V) are not supported in the reset of GDB yet.
This commit removes the special reading of the MISA register in order
to establish the target features, this was only used for figuring out
the f-register size, and even that wasn't done consistently. We now
rely on the target to tell us what size of registers it has (or look
in the BFD as a last resort). The result of this is that we should
now support RV64 targets with 32-bit float, though I have not
extensively tested this combination yet.
* Makefile.in (ALL_TARGET_OBS): Add arch/riscv.o.
(HFILES_NO_SRCDIR): Add arch/riscv.h.
* arch/riscv.c: New file.
* arch/riscv.h: New file.
* configure.tgt: Add cpu_obs list of riscv, move riscv-tdep.o into
this list, and add arch/riscv.o.
* features/Makefile: Add riscv features.
* features/riscv/32bit-cpu.c: New file.
* features/riscv/32bit-cpu.xml: New file.
* features/riscv/32bit-csr.c: New file.
* features/riscv/32bit-csr.xml: New file.
* features/riscv/32bit-fpu.c: New file.
* features/riscv/32bit-fpu.xml: New file.
* features/riscv/64bit-cpu.c: New file.
* features/riscv/64bit-cpu.xml: New file.
* features/riscv/64bit-csr.c: New file.
* features/riscv/64bit-csr.xml: New file.
* features/riscv/64bit-fpu.c: New file.
* features/riscv/64bit-fpu.xml: New file.
* features/riscv/rebuild-csr-xml.sh: New file.
* riscv-tdep.c: Add 'arch/riscv.h' include.
(riscv_gdb_reg_names): Delete.
(csr_reggroup): New global.
(struct riscv_register_alias): Delete.
(struct riscv_register_feature): New structure.
(riscv_register_aliases): Delete.
(riscv_xreg_feature): New global.
(riscv_freg_feature): New global.
(riscv_virtual_feature): New global.
(riscv_csr_feature): New global.
(riscv_create_csr_aliases): New function.
(riscv_read_misa_reg): Delete.
(riscv_has_feature): Delete.
(riscv_isa_xlen): Simplify, just return cached xlen.
(riscv_isa_flen): Simplify, just return cached flen.
(riscv_has_fp_abi): Update for changes in struct gdbarch_tdep.
(riscv_register_name): Update to make use of tdesc_register_name.
Look up xreg and freg names in the new globals riscv_xreg_feature
and riscv_freg_feature. Don't supply csr aliases here.
(riscv_fpreg_q_type): Delete.
(riscv_register_type): Use tdesc_register_type in almost all
cases, override the returned type in a few specific cases only.
(riscv_print_one_register_info): Handle errors reading registers.
(riscv_register_reggroup_p): Use tdesc_register_in_reggroup_p for
registers that are otherwise unknown to GDB. Also check the
csr_reggroup.
(riscv_print_registers_info): Remove assert about upper register
number, and use gdbarch_register_reggroup_p instead of
short-cutting.
(riscv_find_default_target_description): New function.
(riscv_check_tdesc_feature): New function.
(riscv_add_reggroups): New function.
(riscv_setup_register_aliases): New function.
(riscv_init_reggroups): New function.
(_initialize_riscv_tdep): Add calls to setup CSR aliases, and
setup register groups. Register new riscv debug variable.
* riscv-tdep.h: Add 'arch/riscv.h' include.
(struct gdbarch_tdep): Remove abi union, and add
riscv_gdbarch_features field. Remove cached quad floating point
type, and provide initialisation for double type field.
* target-descriptions.c (maint_print_c_tdesc_cmd): Add riscv to
the list of targets using the feature based target descriptions.
* NEWS: Mention target description support.
gdb/doc/ChangeLog:
* gdb.texinfo (Standard Target Features): Add RISC-V Features
sub-section.
While looking over this code, I thought the names of the parameters to
find_oload_champ and related functions and locals were a bit too
cryptic. For example, FN_LIST holds methods, not free functions.
Free-functions are in OLOAD_SYMS.
This patch renames parameters/variables to the more obvious
methods/xmethods/functions instead.
gdb/ChangeLog:
2018-11-21 Pedro Alves <palves@redhat.com>
* valops.c (find_method_list, value_find_oload_method_list)
(find_overload_match, find_oload_champ): Rename parameters and
locals.
This commit replaces some more use of pointer+length pairs in the
overload resolution code with gdb::array_view.
find_oload_champ's interface is simplified/normalized: the xmethods
parameter is converted from std::vector to array pointer, and then the
num_fns parameter is always passed in, no matter the array which is
non-NULL. I tweaked the formatting of callers a little bit here and
there so that the 3 optional parameters are all in the same line. (I
tried making the 3 optional array parameters be array_views, but the
resulting code didn't look as nice.)
gdb/ChangeLog:
2018-11-21 Pedro Alves <palves@redhat.com>
* valops.c (find_method_list): Replace pointer and length
parameters with an gdb::array_view. Adjust.
(value_find_oload_method_list): Likewise.
(find_overload_match): Use gdb::array_view for methods list.
Adjust to find_oload_champ interface change.
(find_oload_champ): 'xm_worker_vec' parameter now a pointer/array.
'num_fns' parameter now a size_t. Eliminate 'fn_count' local.
badness_vector is currently an open coded vector. This reimplements
it as a std::vector.
This fixes a few leaks as well:
- find_oload_champ is leaking every badness vector calculated bar the
one returned.
- bv->rank is always leaked, since callers of rank_function only
xfree the badness_vector pointer, not bv->rank.
gdb/ChangeLog:
2018-11-21 Pedro Alves <palves@redhat.com>
* gdbtypes.c (compare_badness): Change type of parameters to const
reference. Adjust to badness_vector being a std::vector now.
(rank_function): Adjust to badness_vector being a std::vector now.
* gdbtypes.h (badness_vector): Now a typedef to std::vector.
(LENGTH_MATCH): Delete.
(compare_badness): Change type of parameters to const reference.
(rank_function): Return a badness_vector by value now.
(find_overload_match): Adjust to badness_vector being a
std::vector now. Remove cleanups.
(find_oload_champ_namespace): 'oload_champ_bv' parameter now a
badness_vector pointer.
(find_oload_champ_namespace_loop): 'oload_champ_bv' parameter now
a badness_vector pointer. Adjust to badness_vector being a
std::vector now. Remove cleanups.
(find_oload_champ): 'oload_champ_bv' parameter now
a badness_vector pointer. Adjust to badness_vector being a
std::vector now. Remove cleanups.
This gets rid of a few globals and a cleanup.
make_symbol_overload_list & friends currently maintain a global
open-coded vector. Reimplement that with a std::vector, trickled down
through the functions. Rename a few functions from "make_" to "add_"
for clarity.
gdb/ChangeLog:
2018-11-21 Pedro Alves <palves@redhat.com>
* cp-support.c (sym_return_val_size, sym_return_val_index)
(sym_return_val): Delete.
(overload_list_add_symbol): Add std::vector parameter. Adjust to
add to the vector.
(make_symbol_overload_list): Adjust to return a std::vector
instead of maintaining a global open coded vector.
(make_symbol_overload_list_block): Add std::vector parameter.
(make_symbol_overload_list_block): Rename to ...
(add_symbol_overload_list_block): ... this and add std::vector
parameter.
(make_symbol_overload_list_namespace): Rename to ...
(add_symbol_overload_list_namespace): ... this and add std::vector
parameter.
(make_symbol_overload_list_adl_namespace): Rename to ...
(add_symbol_overload_list_adl_namespace): ... this and add
std::vector parameter.
(make_symbol_overload_list_adl): Delete.
(add_symbol_overload_list_adl): New.
(make_symbol_overload_list_using): Rename to ...
(add_symbol_overload_list_using): ... this and add std::vector
parameter.
(make_symbol_overload_list_qualified): Rename to ...
(add_symbol_overload_list_qualified): ... this and add std::vector
parameter.
* cp-support.h: Include "common/array-view.h" and <vector>.
(make_symbol_overload_list): Change return type to std::vector.
(make_symbol_overload_list_adl): Delete declaration.
(add_symbol_overload_list_adl): New declaration.
* valops.c (find_overload_match): Local 'oload_syms' now a
std::vector.
(find_oload_champ_namespace): 'oload_syms' parameter now a
std::vector pointer.
(find_oload_champ_namespace_loop): 'oload_syms' parameter now a
std::vector pointer. Adjust to new make_symbol_overload_list
interface.
This replaces more pointer+length with gdb::array_view. This time,
around invoke_xmethod, and then propagating the fallout around, which
inevitably leaks to the overload resolution code.
There are several places in the code that want to grab a slice of an
array, by advancing the array pointer, and decreasing the length
pointer. This patch introduces a pair of new
gdb::array_view::slice(...) methods to make that convenient and clear.
Unit test included.
gdb/ChangeLog:
2018-11-21 Pedro Alves <palves@redhat.com>
* common/array-view.h (array_view::splice(size_type, size_t)): New.
(array_view::splice(size_type)): New.
* eval.c (eval_call, evaluate_funcall): Adjust to use array_view.
* extension.c (xmethod_worker::get_arg_types): Adjust to return an
std::vector.
(xmethod_worker::get_result_type): Adjust to use gdb::array_view.
* extension.h: Include "common/array-view.h".
(xmethod_worker::invoke): Adjust to use gdb::array_view.
(xmethod_worker::get_arg_types): Adjust to return an std::vector.
(xmethod_worker::get_result_type): Adjust to use gdb::array_view.
(xmethod_worker::do_get_arg_types): Adjust to use std::vector.
(xmethod_worker::do_get_result_type): Adjust to use
gdb::array_view.
* gdbtypes.c (rank_function): Adjust to use gdb::array_view.
* gdbtypes.h: Include "common/array-view.h".
(rank_function): Adjust to use gdb::array_view.
* python/py-xmethods.c (python_xmethod_worker::invoke)
(python_xmethod_worker::do_get_arg_types)
(python_xmethod_worker::do_get_result_type)
(python_xmethod_worker::invoke): Adjust to new interfaces.
* valarith.c (value_user_defined_cpp_op, value_user_defined_op)
(value_x_binop, value_x_unop): Adjust to use gdb::array_view.
* valops.c (find_overload_match, find_oload_champ_namespace)
(find_oload_champ_namespace_loop, find_oload_champ): Adjust to use
gdb:array_view and the new xmethod_worker interfaces.
* value.c (result_type_of_xmethod, call_xmethod): Adjust to use
gdb::array_view.
* value.h (find_overload_match, result_type_of_xmethod)
(call_xmethod): Adjust to use gdb::array_view.
* unittests/array-view-selftests.c: Add slicing tests.
This replaces a few uses of pointer+length with gdb::array_view, in
call_function_by_hand and related code.
Unfortunately, due to -Wnarrowing, there are places where we can't
brace-initialize an gdb::array_view without an ugly-ish cast. To
avoid the cast, this patch introduces a gdb::make_array_view function.
Unit tests included.
This patch in isolation may not look so interesting, due to
gdb::make_array_view uses, but I think it's still worth it. Some of
the gdb::make_array_view calls disappear down the series, and others
could be eliminated with more (non-trivial) gdb::array_view
detangling/conversion (e.g. code around eval_call). See this as a "we
have to start somewhere" patch.
gdb/ChangeLog:
2018-11-21 Pedro Alves <palves@redhat.com>
* ada-lang.c (ada_evaluate_subexp): Adjust to pass an array_view.
* common/array-view.h (make_array_view): New.
* compile/compile-object-run.c (compile_object_run): Adjust to
pass an array_view.
* elfread.c (elf_gnu_ifunc_resolve_addr): Adjust.
* eval.c (eval_call): Adjust to pass an array_view.
(evaluate_subexp_standard): Adjust to pass an array_view.
* gcore.c (call_target_sbrk): Adjust to pass an array_view.
* guile/scm-value.c (gdbscm_value_call): Likewise.
* infcall.c (push_dummy_code): Replace pointer + size parameters
with an array_view parameter.
(call_function_by_hand, call_function_by_hand_dummy): Likewise and
adjust.
* infcall.h: Include "common/array-view.h".
(call_function_by_hand, call_function_by_hand_dummy): Replace
pointer + size parameters with an array_view parameter.
* linux-fork.c (inferior_call_waitpid): Adjust to use array_view.
* linux-tdep.c (linux_infcall_mmap): Likewise.
* objc-lang.c (lookup_objc_class, lookup_child_selector)
(value_nsstring, print_object_command): Likewise.
* python/py-value.c (valpy_call): Likewise.
* rust-lang.c (rust_evaluate_funcall): Likewise.
* spu-tdep.c (flush_ea_cache): Likewise.
* valarith.c (value_x_binop, value_x_unop): Likewise.
* valops.c (value_allocate_space_in_inferior): Likewise.
* unittests/array-view-selftests.c (run_tests): Add
gdb::make_array_view test.
This patch removes a FIXME comment from cli-out.c, now instead of
formatting integers into a fixed size buffer we build a std::string
and extract the formatted integer from that.
The old code using a fixed size buffer was probably fine (the integer
was not going to overflow it) and probably slightly more efficient
(avoids building a std::string) however, given we already have utility
code in GDB that will allow the 'FIXME' comment to be removed, it
seems like an easy improvement.
gdb/ChangeLog:
* cli-out.c (cli_ui_out::do_field_int): Use string_printf rather
than a fixed size buffer.
Currently the method 'cli_ui_out::do_field_fmt' has this comment:
/* This is the only field function that does not align. */
The reality is even slightly worse, the 'fmt' field type doesn't
respect either the field alignment or the field width. In at least
one place in GDB we attempt to work around this lack of respect for
field width by adding additional padding manually. But, as is often
the case, this is leading to knock on problems.
Conside the output for 'info breakpoints' when a breakpoint has
multiple locations. This example is taken from the testsuite, from
test gdb.opt/inline-break.exp:
(gdb) info breakpoints
Num Type Disp Enb Address What
1 breakpoint keep y <MULTIPLE>
1.1 y 0x00000000004004ae in func4b at /src/gdb/testsuite/gdb.opt/inline-break.c:64
1.2 y 0x0000000000400682 in func4b at /src/gdb/testsuite/gdb.opt/inline-break.c:64
The miss-alignment of the fields shown here is exactly as GDB
currently produces.
With this patch 'fmt' style fields are now first written into a
temporary buffer, and then written out as a 'string' field. The
result is that the field width, and alignment should now be respected.
With this patch in place the output from GDB now looks like this:
(gdb) info breakpoints
Num Type Disp Enb Address What
1 breakpoint keep y <MULTIPLE>
1.1 y 0x00000000004004ae in func4b at /src/gdb/testsuite/gdb.opt/inline-break.c:64
1.2 y 0x0000000000400682 in func4b at /src/gdb/testsuite/gdb.opt/inline-break.c:64
This patch has been tested on x86-64/Linux with no regressions,
however, the testsuite doesn't always spot broken output formatting or
alignment. I have also audited all uses of 'fmt' fields that I could
find, and I don't think there are any other places that specifically
try to work around the lack of width/alignment, however, I could have
missed something.
gdb/ChangeLog:
* breakpoint.c (print_one_breakpoint_location): Reduce whitespace,
and remove insertion of extra spaces in GDB's output.
* cli-out.c (cli_ui_out::do_field_fmt): Update header comment.
Layout field into a temporary buffer, and then output it as a
string field.
gdb/testsuite/ChangeLog:
* gdb.opt/inline-break.exp: Add test that info breakpoint output
is correctly aligned.
gdb/ChangeLog
2018-11-20 Philippe Waroquiers <philippe.waroquiers@skynet.be>
* NEWS: Document the language choice done by
'info [types|functions|variables]|rbreak'.
doc/ChangeLog
2018-11-20 Philippe Waroquiers <philippe.waroquiers@skynet.be>
* gdb.texinfo (Examining the Symbol Table): Document language choice
for 'info types|functions|variables' commands.
(Setting Breakpoints): Document language choice to print
the functions in which a breakpoint is set.
2018-11-20 Philippe Waroquiers <philippe.waroquiers@skynet.be>
* gdb.ada/info_auto_lang.exp: New testcase.
* gdb.ada/info_auto_lang/global_pack.ads: New file.
* gdb.ada/info_auto_lang/proc_in_ada.adb: New file.
* gdb.ada/info_auto_lang/some_c.c: New file.
Use scoped_switch_to_sym_language_if_auto in treg_matches_sym_type_name to
replace the local logic that was doing the same as the new class
scoped_switch_to_sym_language_if_auto.
Use scoped_switch_to_sym_language_if_auto inside print_symbol_info, so
that symbol information is printed in the symbol language when
language mode is auto.
This modifies the behaviour of the test dw2-case-insensitive.exp,
as the function FUNC_lang is now printed with the Fortran syntax
(as declared in the .S file).
gdb/ChangeLog
2018-11-20 Philippe Waroquiers <philippe.waroquiers@skynet.be>
* symtab.c (treg_matches_sym_type_name): Use
scoped_switch_to_sym_language_if_auto instead of local logic.
(print_symbol_info): Use scoped_switch_to_sym_language_if_auto
to switch to SYM language when language mode is auto.
gdb/testsuite/ChangeLog
2018-11-20 Philippe Waroquiers <philippe.waroquiers@skynet.be>
* gdb.dwarf2/dw2-case-insensitive.exp: Update due to auto switch to
FUNC_lang language syntax.
The class scoped_switch_to_sym_language_if_auto allows to switch in a scope
the current language to the language of a symbol when language mode is
set to auto.
2018-11-20 Philippe Waroquiers <philippe.waroquiers@skynet.be>
* language.h (scoped_switch_to_sym_language_if_auto): New class.
12615cba84 Add [-q] [-t TYPEREGEXP] [NAMEREGEXP] args to info [args|functions|locals|variables]
introduced a regression that minimal symbols were not listed anymore, due to a wrong
condition checking the absence of a type regexp in the loop scanning the minimal symbols.
Instead, before entering the loop scanning the minimal symbols, check that we
do not have a type regexp, as we will never match a minimal symbol with
this type regexp.
With the fix in this patch, for this part of the code, we basically go back
to the GDB 8.2 logic, with just the addition of
&& !treg.has_value ())
to 'enter' in the minsym case.
This should ensure that at least there is no regression compared to 8.2,
when not using the new type matching argument, as there was no treg in 8.2.
2018-11-20 Philippe Waroquiers <philippe.waroquiers@skynet.be>
* symtab.c (search_symbols): Properly check absence of type regexp
before entering the loop scanning the minimal symbols.
Make gdb aware of the return values of functions which
return in registers.
gdb/ChangeLog:
* s12z-tdep.c (s12z_extract_return_value): New function.
(inv_reg_perm) New array.
(s12z_return_value): Populate readbuf if non-null.
This warning was displayed by OutputDebugString on MinGW when
GDB was being debugged natively.
gdb/ChangeLog:
* common/filestuff.c (gdb_fopen_cloexec): Disable use of "e" mode
with 'fopen' also if O_CLOEXEC is equal to O_NOINHERIT, to cater
to MinGW fixed by Gnulib.
Since some object files may not have build notes, it is normal to have
gaps in build notes.
PR binutils/23898
* testsuite/lib/binutils-common.exp (prune_warnings_extra):
Prune gaps in build notes.
Commit
39a36629f6 ("Use std::forward_list for displaced_step_inferior_states")
missed removing the "next" field, while changing the hand-made linked
list in favor of std::forward_list. This patch fixes that.
gdb/ChangeLog:
* infrun.c (displaced_step_inferior_state) <next>: Remove.
The return value from get_filename_and_charpos is never used, so this
patch changes it to return void.
gdb/ChangeLog
2018-11-19 Tom Tromey <tom@tromey.com>
* source.c (get_filename_and_charpos): Return void.
"help info skip" uses "skip info" in its examples, which is not the same
(it ends up creating new skips). Also, the Type column that is referred
to doesn't exist today.
gdb/ChangeLog:
* skip.c (_initialize_step_skip): Fix "info skip" help.
This changes the Rust type printers to handle TYPE_CODE_PTR. The
current approach is not ideal, because currently the code can't
distinguish between mut and const, or between pointers and references.
(These are debuginfo deficiencies, for which there are rustc bugs on
file.)
Meanwhile, this at least clears up the case seen in PR rust/23625.
Tested on x86-64 Fedora 28. The nightly compiler gives the best
results, but I regression-tested with stable and beta as well.
gdb/ChangeLog
2018-11-16 Tom Tromey <tom@tromey.com>
PR rust/23625:
* rust-lang.c (rust_internal_print_type): Handle TYPE_CODE_PTR.
gdb/testsuite/ChangeLog
2018-11-19 Tom Tromey <tom@tromey.com>
PR rust/23625:
* gdb.rust/simple.exp: Add ptype test. Update expected output.
* gdb.rust/expr.exp: Update expected output. Change one test.
gdb.rust/simple.exp will fail when run with a recent version of rustc.
This patch fixes the test case so that it will continue to run.
Tested on x86-64 Fedora 28.
I also temporarily backed out the rust-lang.c from
commit 098b2108a2, and verified that
this updated test still would have provoked the original bug.
gdb/testsuite/ChangeLog
2018-11-19 Tom Tromey <tom@tromey.com>
* gdb.rust/simple.rs: Don't initialize empty_enum_value.
Use std::forward_list instead of manually implemented list. This
simplifies a bit the code, especially around removal.
Regtested on the buildbot. There are some failures as always, but I
think they are unrelated.
gdb/ChangeLog:
* infrun.c (displaced_step_inferior_states): Change type to
std::forward_list.
(get_displaced_stepping_state): Adjust.
(displaced_step_in_progress_any_inferior): Adjust.
(add_displaced_stepping_state): Adjust.
(remove_displaced_stepping_state): Adjust.
#1- Check that the warning is emitted.
#2- Avoid overriding INTERNAL_GDBFLAGS, as per documentated in
gdb/testsuite/README:
~~~
The testsuite does not override a value provided by the user.
~~~
We don't actually need to tweak INTERNAL_GDBFLAGS, we just need to
append out -data-directory to GDBFLAGS, because each passed
-data-directory option leads to a call to the warning:
$ ./gdb -data-directory=foo -data-directory=bar
Warning: foo: No such file or directory.
Warning: bar: No such file or directory.
[...]
gdb/ChangeLog
2018-11-19 Pedro Alves <palves@redhat.com>
* gdb.base/warning.exp: Don't override INTERNAL_FLAGS. Use
gdb_spawn_with_cmdline_opts instead of gdb_start. Check that we
see the expected warning.
PR build/23814 points out that ia64-linux-nat.c will not compile any
more. This patch fixes the problem. Thanks to Andreas Schwab for
trying the patch.
gdb/ChangeLog
2018-11-18 Tom Tromey <tom@tromey.com>
PR build/23814:
* target-delegates.c: Rebuild.
* ia64-linux-nat.c (class ia64_linux_nat_target)
<have_steppable_watchpoint>: Use override. Return true, not 1.
(ia64_linux_nat_target::can_use_hw_breakpoint): Rename. Remove
"self" argument.
(ia64_linux_nat_target::low_new_thread): Rename.
(class ia64_linux_nat_target) <read_description>: Don't declare.
* target.h (struct target_ops) <have_steppable_watchpoint>: Return
bool.
Philippe Waroquiers
GDB Administrator
Andre Vieira
Alan Hayward
Pedro Alves
John Darrington
Benno Fünfstück
Jozef Lawrynowicz
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Eli Zaretskii
H.J. Lu
Simon Marchi
Tom Tromey
Simon Marchi