With an Ada program, trying to break on a specific Ada task, but
with the wrong capitalization of the `task' keyword, we currently
get only pieces of the "garbage" that caused the error:
(gdb) b *rendez_vous'address TASK 2
Garbage 2 at end of command
Pushing this a little further:
(gdb) b *rendez_vous'address TASK Task TaSK 2
Garbage 2 at end of command
Another interesting failure mode:
(gdb) b *rendez_vous'address TASK if
Argument required (expression to compute).
The parser skipped `TASK', then found the `if' keyword, and thus
started looking for a condition.
This patch fixes the problem by aborting the parsing as soon as
an invalid keyword is found. This makes it consistent with the
case where the REST parameter is passed as NULL (where an error
is raised immediately after seeing the first invalid keyword).
It also introduces a new testcase that reproduces all above scenarios.
gdb/ChangeLog:
* breakpoint.c (find_condition_and_thread): Stop parsing
as soon as the first invalid keyword is found.
gdb/testsuite/ChangeLog:
* gdb.ada/bad-task-bp-keyword: New testcase.
* breakpoint.h (bp_location): Add related_address member.
* inferior.h (get_return_value): Take a pointer to struct value
instead of struct type for the function requested.
* value.h (using_struct_return): Likewise.
* gdbarch.sh (return_value): Take a pointer to struct value
instead of struct type for the function requested.
* breakpoint.c (set_breakpoint_location_function): Initialize
related_address for bp_gnu_ifunc_resolver breakpoints.
* elfread.c (elf_gnu_ifunc_resolver_return_stop): Pass the
requested function's address to gdbarch_return_value.
* eval.c (evaluate_subexp_standard): Pass the requested
function's address to using_struct_return.
* infcall.c (call_function_by_hand): Pass the requested
function's address to using_struct_return and
gdbarch_return_value.
* infcmd.c (get_return_value): Take a pointer to struct value
instead of struct type for the function requested.
(print_return_value): Update accordingly.
(finish_command_continuation): Likewise.
* stack.c (return_command): Pass the requested function's
address to using_struct_return and gdbarch_return_value.
* value.c (using_struct_return): Take a pointer to struct value
instead of struct type for the function requested. Pass the
requested function's address to gdbarch_return_value.
* python/py-finishbreakpoint.c (finish_breakpoint_object):
New function_value member, replacing function_type.
(bpfinishpy_dealloc): Update accordingly.
(bpfinishpy_pre_stop_hook): Likewise.
(bpfinishpy_init): Likewise. Record the requested function's
address.
* mips-tdep.c (mips_fval_reg): New enum.
(mips_o32_push_dummy_call): For MIPS16 FP doubles do not swap
words put in GP registers.
(mips_o64_push_dummy_call): Update a comment.
(mips_o32_return_value): Take a pointer to struct value instead
of struct type for the function requested and use it to check if
using the MIPS16 calling convention. Return the designated
general purpose registers for floating-point values returned in
MIPS16 mode.
(mips_o64_return_value): Likewise.
* ppc-tdep.h (ppc_sysv_abi_return_value): Update prototype.
(ppc_sysv_abi_broken_return_value): Likewise.
(ppc64_sysv_abi_return_value): Likewise.
* alpha-tdep.c (alpha_return_value): Take a pointer to struct
value instead of struct type for the function requested.
* amd64-tdep.c (amd64_return_value): Likewise.
* amd64-windows-tdep.c (amd64_windows_return_value): Likewise.
* arm-tdep.c (arm_return_value): Likewise.
* avr-tdep.c (avr_return_value): Likewise.
* bfin-tdep.c (bfin_return_value): Likewise.
* cris-tdep.c (cris_return_value): Likewise.
* frv-tdep.c (frv_return_value): Likewise.
* h8300-tdep.c (h8300_return_value): Likewise.
(h8300h_return_value): Likewise.
* hppa-tdep.c (hppa32_return_value): Likewise.
(hppa64_return_value): Likewise.
* i386-tdep.c (i386_return_value): Likewise.
* ia64-tdep.c (ia64_return_value): Likewise.
* iq2000-tdep.c (iq2000_return_value): Likewise.
* lm32-tdep.c (lm32_return_value): Likewise.
* m32c-tdep.c (m32c_return_value): Likewise.
* m32r-tdep.c (m32r_return_value): Likewise.
* m68hc11-tdep.c (m68hc11_return_value): Likewise.
* m68k-tdep.c (m68k_return_value): Likewise.
(m68k_svr4_return_value): Likewise.
* m88k-tdep.c (m88k_return_value): Likewise.
* mep-tdep.c (mep_return_value): Likewise.
* microblaze-tdep.c (microblaze_return_value): Likewise.
* mn10300-tdep.c (mn10300_return_value): Likewise.
* moxie-tdep.c (moxie_return_value): Likewise.
* mt-tdep.c (mt_return_value): Likewise.
* ppc-linux-tdep.c (ppc_linux_return_value): Likewise.
* ppc-sysv-tdep.c (ppc_sysv_abi_return_value): Likewise.
(ppc_sysv_abi_broken_return_value): Likewise.
(ppc64_sysv_abi_return_value): Likewise.
* ppcnbsd-tdep.c (ppcnbsd_return_value): Likewise.
* rl78-tdep.c (rl78_return_value): Likewise.
* rs6000-aix-tdep.c (rs6000_return_value): Likewise.
* rx-tdep.c (rx_return_value): Likewise.
* s390-tdep.c (s390_return_value): Likewise.
* score-tdep.c (score_return_value): Likewise.
* sh-tdep.c (sh_return_value_nofpu): Likewise.
(sh_return_value_fpu): Likewise.
* sh64-tdep.c (sh64_return_value): Likewise.
* sparc-tdep.c (sparc32_return_value): Likewise.
* sparc64-tdep.c (sparc64_return_value): Likewise.
* spu-tdep.c (spu_return_value): Likewise.
* tic6x-tdep.c (tic6x_return_value): Likewise.
* v850-tdep.c (v850_return_value): Likewise.
* vax-tdep.c (vax_return_value): Likewise.
* xstormy16-tdep.c (xstormy16_return_value): Likewise.
* xtensa-tdep.c (xtensa_return_value): Likewise.
* gdbarch.c: Regenerate.
* gdbarch.h: Regenerate.
gdb/testsuite/
* gdb.base/return-nodebug.exp: Also test float and double types.
Mostly removing trailing spaces at end of lines, and also adding
an empty line after the function's documentation.
gdb/ChangeLog:
* breakpoint.c (find_condition_and_thread): Minor reformatting.
Tom Tromey <tromey@redhat.com>
* breakpoint.c (struct breakpoint_objfile_data)
<longjmp_searched>,<longjmp_probes>,<exception_searched>,
<exception_probes>: New fields.
(free_breakpoint_probes): New function.
(create_longjmp_master_breakpoint): Prefer SystemTap probe over
`_Unwind_DebugHook'.
(create_exception_master_breakpoint): Likewise.
(_initialize_breakpoint): Registering cleanup for SystemTap probes.
* infrun.c: Including necessary header files for handling SystemTap
probes.
(handle_inferior_event): Handling longjmp breakpoint and exceptions
via SystemTap probes.
(check_exception_resume): Remove `func' argument. Handle exception
unwinding breakpoint set via a SystemTap probe.
(insert_exception_resume_from_probe): New function.
Revert this patch to allow breakpoint always-inserted
in record target.
2011-12-05 Pedro Alves <pedro@codesourcery.com>
* breakpoint.c: Include record.h.
(breakpoints_always_inserted_mode): Return false when the record
target is in use.
* breakpoint.c (iterate_over_bp_locations): New.
* breakpoint.h: Declare.
New typedef walk_bp_location_callback.
* record.c (record_open): Call record_init_record_breakpoints.
(record_sync_record_breakpoints): New.
(record_init_record_breakpoints): New.
* NEWS: Mention supporting breakpoint always-inserted mode in
record target.
When debugging on Windows with GDBserver, the debugger starts
failing after hitting a breakpoint. For instance:
(gdb) b foo
Breakpoint 1 at 0x40177e: file foo.adb, line 5.
(gdb) cont
Continuing.
Breakpoint 1, foo () at foo.adb:5
5 Put_Line ("Hello World."); -- STOP
(gdb) n
Program received signal SIGSEGV, Segmentation fault.
0x00401782 in foo () at foo.adb:5
5 Put_Line ("Hello World."); -- STOP
There are two issues:
1. While trying to re-insert a breakpoint that is still inserted
in memory, insert_bp_location wipes out the breakpoint location's
shadow_contents. As a consequence, we cannot restore the proper
instruction when removing the breakpoint anymore. That's why
the inferior's behavior changes when trying to resume after
the breakpoint was hit.
2. mem-break.c:default_memory_insert_breakpoint passes a breakpoint
location's shadow_contents as the buffer for a memory read.
This reveals a limitation of the various memory-read target
functions. This patch documents this limitation and adjust
the two calls that seem to hit that limitation.
gdb/ChangeLog:
* breakpoint.c (breakpoint_xfer_memory): Add assertion.
Update function description.
(insert_bp_location): Do not wipe bl->target_info out.
* mem-break.c: #include "gdb_string.h".
(default_memory_insert_breakpoint): Do not call target_read_memory
with a pointer to the breakpoint's shadow_contents buffer. Use
a local buffer instead.
* m32r-tdep.c (m32r_memory_insert_breakpoint): Ditto.
The 3 valid values for this setting are "auto", "host" and "target".
The help was advertising one of them to be "gdb" instead of "host".
gdb/ChangeLog:
* breakpoint.c (_initialize_breakpoint): Fix error in help of
"set breakpoint condition-evaluation" command.
Pedro Alves <palves@redhat.com>
PR breakpoints/13776:
* breakpoint.c (breakpoint_init_inferior): Delete step-resume
breakpoints.
(delete_longjmp_breakpoint_at_next_stop): New.
* breakpoint.h (delete_longjmp_breakpoint_at_next_stop): Declare.
* target.c (generic_mourn_inferior): Call mark_breakpoints_out
before deleting the inferior. Add comments.
* thread.c (clear_thread_inferior_resources): Don't delete lonjmp
breakpoints immediately, but only on next stop. Move that code
next to where we mark other breakpoints for deletion.
* remote.c (remote_supports_cond_breakpoints): New forward
declaration.
(remote_add_target_side_condition): New function.
(remote_insert_breakpoint): Add target-side breakpoint
conditional if supported.
(remote_insert_hw_breakpoint): Likewise.
(init_remote_ops): Set to_supports_evaluation_of_breakpoint_conditions
hook.
* target.c (update_current_target): Inherit
to_supports_evaluation_of_breakpoint_conditions.
Default to_supports_evaluation_of_breakpoint_conditions to return_zero.
* target.h (struct target_ops)
<to_supports_evaluation_of_breakpoint_conditions>: New field.
(target_supports_evaluation_of_breakpoint_conditions): New #define.
* breakpoint.c (get_first_locp_gte_addr): New forward declaration.
(condition_evaluation_both, condition_evaluation_auto,
condition_evaluation_host, condition_evaluation_target,
condition_evaluation_enums, condition_evaluation_mode_1,
condition_evaluation_mode): New static globals.
(translate_condition_evaluation_mode): New function.
(breakpoint_condition_evaluation_mode): New function.
(gdb_evaluates_breakpoint_condition_p): New function.
(ALL_BP_LOCATIONS_AT_ADDR): New helper macro.
(mark_breakpoint_modified): New function.
(mark_breakpoint_location_modified): New function.
(set_condition_evaluation_mode): New function.
(show_condition_evaluation_mode): New function.
(bp_location_compare_addrs): New function.
(get_first_location_gte_addr): New helper function.
(set_breakpoint_condition): Free condition bytecode if locations
has become unconditional. Call mark_breakpoint_modified (...).
(condition_command): Call update_global_location_list (1) for
breakpoints.
(breakpoint_xfer_memory): Use is_breakpoint (...).
(is_breakpoint): New function.
(parse_cond_to_aexpr): New function.
(build_target_condition_list): New function.
(insert_bp_location): Handle target-side conditional
breakpoints and call build_target_condition_list (...).
(update_inserted_breakpoint_locations): New function.
(insert_breakpoint_locations): Handle target-side conditional
breakpoints.
(bpstat_check_breakpoint_conditions): Add comment.
(bp_condition_evaluator): New function.
(bp_location_condition_evaluator): New function.
(print_breakpoint_location): Print information on where the condition
will be evaluated.
(print_one_breakpoint_location): Likewise.
(init_bp_location): Call mark_breakpoint_location_modified (...) for
breakpoint location.
(force_breakpoint_reinsertion): New functions.
(update_global_location_list): Handle target-side breakpoint
conditions.
Reinsert locations that are already inserted if conditions have
changed.
(bp_location_dtor): Free agent expression bytecode.
(disable_breakpoint): Call mark_breakpoint_modified (...).
Call update_global_location_list (...) with parameter 1 for breakpoints.
(disable_command): Call mark_breakpoint_location_modified (...).
Call update_global_location_list (...) with parameter 1 for breakpoints.
(enable_breakpoint_disp): Call mark_breakpoint_modified (...).
(enable_command): mark_breakpoint_location_modified (...).
(_initialize_breakpoint): Update documentation and add
condition-evaluation breakpoint subcommand.
* breakpoint.h: Include ax.h.
(condition_list): New data structure.
(condition_status): New enum.
(bp_target_info) <cond_list>: New field.
(bp_location) <condition_changed, cond_bytecode>: New fields.
(is_breakpoint): New prototype.
* solib.c (update_solib_list): Update the program space's
added_solibs and deleted_solibs fields.
* progspace.h (struct program_space) <added_solibs,
deleted_solibs>: New fields.
(clear_program_space_solib_cache): Declare.
* progspace.c (release_program_space): Call
clear_program_space_solib_cache.
(clear_program_space_solib_cache): New function.
* infrun.c (handle_inferior_event) <TARGET_WAITKIND_LOADED>: Call
bpstat_stop_status. Use handle_solib_event.
* breakpoint.c: Include gdb_regex.h.
(print_solib_event): New function.
(bpstat_print): Use print_solib_event.
(bpstat_stop_status): Add special case for bp_shlib_event.
(handle_solib_event): New function.
(bpstat_what): Use handle_solib_event.
(struct solib_catchpoint): New.
(dtor_catch_solib, insert_catch_solib, remove_catch_solib)
(breakpoint_hit_catch_solib, check_status_catch_solib)
(print_it_catch_solib, print_one_catch_solib)
(print_mention_catch_solib, print_recreate_catch_solib): New
functions.
(catch_solib_breakpoint_ops): New global.
(catch_load_or_unload, catch_load_command_1)
(catch_unload_command_1): New functions.
(internal_bkpt_check_status): Add special case for
bp_shlib_event.
(internal_bkpt_print_it): Use print_solib_event.
(initialize_breakpoint_ops): Initialize
catch_solib_breakpoint_ops.
(_initialize_breakpoint): Register "catch load" and "catch
unload".
* breakpoint.h (handle_solib_event): Declare.
* NEWS: Add entry for "catch load" and "catch unload".
gdb/doc
* gdb.texinfo (Set Catchpoints): Document "catch load" and "catch
unload".
(Files): Mention new catch commands.
(GDB/MI Async Records): Likewise.
gdb/testsuite
* lib/mi-support.exp (mi_expect_stop): Add special case for
solib-event.
* gdb.base/catch-load-so.c: New file.
* gdb.base/catch-load.exp: New file.
* gdb.base/catch-load.c: New file.
* gdb.base/break-interp.exp (reach_1): Update regexp.
* breakpoint.c (breakpoint_hit_catch_fork)
(breakpoint_hit_catch_vfork, breakpoint_hit_catch_syscall)
(breakpoint_hit_catch_exec): Make use of the `ws' argument.
* infrun.c (inferior_has_forked, inferior_has_vforked)
(inferior_has_execd, inferior_has_called_syscall): Delete.
(handle_syscall_event): Get syscall_number from the execution
control state's wait status.
(wait_for_inferior): Don't clear syscall_number.
* breakpoint.c (bpstat_stop_status): Moving clearing print_it
outside `bs->stop' block.
(bpstat_what): Rework bp_shlib_event handling.
(internal_bkpt_check_status): If the breakpoint is a
bp_shlib_event, then set bs->stop and bs->print if
stop_on_solib_events is set.
Fix watchpoints to be specific for each inferior.
* breakpoint.c (watchpoint_in_thread_scope): Verify also
current_program_space.
* i386-nat.c (i386_inferior_data_cleanup): New.
(i386_inferior_data_get): Replace variable inf_data_local by an
inferior_data call.
(i386_use_watchpoints): Initialize i386_inferior_data.
* linux-nat.c (linux_nat_iterate_watchpoint_lwps): Use INFERIOR_PTID
specific iterate_over_lwps.
gdb/testsuite/
Fix watchpoints to be specific for each inferior.
* gdb.multi/watchpoint-multi.c: New file.
* gdb.multi/watchpoint-multi.exp: New file.
* NEWS: Add item.
* symtab.h (compare_filenames_for_search): Declare.
* symtab.c (compare_filenames_for_search): New function.
(iterate_over_some_symtabs): Use it.
* symfile.h (struct quick_symbol_functions)
<map_symtabs_matching_filename>: Change spec.
* psymtab.c (partial_map_symtabs_matching_filename): Use
compare_filenames_for_search. Update for new spec.
* dwarf2read.c (dw2_map_symtabs_matching_filename): Use
compare_filenames_for_search. Update for new spec.
* breakpoint.c (clear_command): Use compare_filenames_for_search.
gdb/doc
* gdb.texinfo (Specify Location): Document relative file name
handling.
gdb/testsuite
* gdb.linespec/linespec.exp: Change some tests to use $decimal.
Add tests for relative directory.
* breakpoint.c (create_sals_from_address_default): New function.
(create_breakpoints_sal_default): Likewise.
(decode_linespec_default): Likewise.
(is_marker_spec): Removed.
(strace_marker_p): New function.
(init_breakpoint_sal): Using `strace_marker_p' instead of
`is_marker_spec'.
(create_breakpoint): Call method `create_sals_from_address' from
breakpoint_ops, replacing code that created SALs conditionally
on the type of the breakpoint. Call method `create_breakpoints_sal',
replacing code that created breakpoints conditionally on the type
wanted.
(base_breakpoint_create_sals_from_address): New function.
(base_breakpoint_create_breakpoints_sal): Likewise.
(base_breakpoint_decode_linespec): Likewise.
(base_breakpoint_ops): Add methods
`base_breakpoint_create_sals_from_address',
`base_breakpoint_create_breakpoints_sal' and
`base_breakpoint_decode_linespec'.
(bkpt_create_sals_from_address): New function.
(bkpt_create_breakpoints_sal): Likewise.
(bkpt_decode_linespec): Likewise.
(tracepoint_create_sals_from_address): Likewise.
(tracepoint_create_breakpoints_sal): Likewise.
(tracepoint_decode_linespec): Likewise.
(strace_marker_create_sals_from_address): Likewise.
(strace_marker_create_breakpoints_sal): Likewise.
(strace_marker_decode_linespec): Likewise.
(strace_marker_breakpoint_ops): New variable.
(addr_string_to_sals): Remove `marker_spec'. Call method
`decode_linespec' from breakpoint_ops, replacing code that decoded
an address string into a SAL. Use `strace_marker_p' instead of
`marker_spec'.
(strace_command): Decide whether we are dealing with a static
tracepoint with marker or not. Use the appropriate breakpoint_ops.
(initialize_breakpoint_ops): Initialize new fields of breakpoint_ops.
* breakpoint.h (linespec_result, linespec_sals): New forward
declarations.
(breakpoint_ops) <create_sals_from_address>,
<create_breakpoints_sal>, <decode_linespec>: New methods.
* Makefile.in (SUBDIR_PYTHON_OBS): Add py-finishbreakpoint.o.
(SUBDIR_PYTHON_SRCS): Add python/py-finishbreakpoint.c.
Add build rule for this file.
* infcmd.c (print_return_value): Split to create get_return_value.
(get_return_value): New function based on print_return_value. Handle
case where stop_registers are not set.
* inferior.h (get_return_value): New prototype.
* python/py-breakpoint.c (bppy_pending_object): Make non-static.
(gdbpy_breakpoint_created): Set is_py_finish_bp is necessary.
(struct breakpoint_object): Move to python-internal.h
(BPPY_REQUIRE_VALID): Likewise.
(BPPY_SET_REQUIRE_VALID): Likewise.
(gdbpy_breakpoint_created): Initialize is_finish_bp.
(gdbpy_should_stop): Add pre/post hooks before/after calling stop
method.
* python/python-internal.h (breakpoint_object_type): Add as extern.
(bppy_pending_object): Likewise.
(typedef struct breakpoint_object) Removed.
(struct breakpoint_object): Moved from py-breakpoint.c.
Add field is_finish_bp.
(BPPY_REQUIRE_VALID): Moved from py-breakpoint.c.
(BPPY_SET_REQUIRE_VALID): Likewise.
(frame_object_to_frame_info): New prototype.
(gdbpy_initialize_finishbreakpoints): New prototype.
(bpfinishpy_is_finish_bp): Likewise.
(bpfinishpy_pre_stop_hook): Likewise.
(bpfinishpy_post_stop_hook): Likewise.
* python/py-finishbreakpoint.c: New file.
* python/py-frame.c(frame_object_to_frame_info): Make non-static and
accept PyObject instead of frame_object.
(frapy_is_valid): Don't cast to frame_object.
(frapy_name): Likewise.
(frapy_type): Likewise.
(frapy_unwind_stop_reason): Likewise.
(frapy_pc): Likewise.
(frapy_block): Likewise.
(frapy_function): Likewise.
(frapy_older): Likewise.
(frapy_newer): Likewise.
(frapy_find_sal): Likewise.
(frapy_read_var): Likewise.
(frapy_select): Likewise.
* python/python.c (gdbpy_is_stopped_at_finish_bp): New noop function.
(_initialize_python): Add gdbpy_initialize_finishbreakpoints.
* python/python.h: Include breakpoint.h
(gdbpy_is_stopped_at_finish_bp): New prototype.
doc/
* gdb.texinfo (Finish Breakpoints in Python): New subsection.
(Python API): Add menu entry for Finish Breakpoints.
testsuite/
* Makefile.in (EXECUTABLES): Add py-finish-breakpoint and
py-finish-breakpoint2
(MISCALLANEOUS): Add py-events-shlib.so and py-events-shlib-nodebug.so
* gdb.python/py-breakpoint.exp (mult_line): Define and use variable
instead of line number.
* gdb.python/py-finish-breakpoint.c: New file.
* gdb.python/py-finish-breakpoint.exp: New file.
* gdb.python/py-finish-breakpoint.py: New file.
* gdb.python/py-finish-breakpoint2.cc: New file.
* gdb.python/py-finish-breakpoint2.exp: New file.
* gdb.python/py-finish-breakpoint2.py: New file.
Pedro Alves