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187d10dd19
suppress multiple breakpoints-invalid annotations when the ignore
count of a breakpoint changes, up until the target actually stops.
But, the code is bogus:
void
annotate_breakpoints_changed (void)
{
if (annotation_level == 2)
{
target_terminal_ours ();
printf_unfiltered (("\n\032\032breakpoints-invalid\n"));
if (ignore_count_changed)
ignore_count_changed = 0; /* Avoid multiple break annotations. */
}
}
The "ignore_count_changed" flag isn't actually guarding the output of
the annotation at all. It would have been better written something
like:
void
annotate_breakpoints_changed (void)
{
if (annotation_level == 2 && !ignore_count_changed)
{
target_terminal_ours ();
printf_unfiltered (("\n\032\032breakpoints-invalid\n"));
ignore_count_changed = 0; /* Avoid multiple break annotations. */
}
}
but, it wasn't. AFAICS, that goes all the way back to the original
patch'es submission and check in, at
<http://sourceware.org/ml/gdb-patches/1999-q4/msg00106.html>. I
looked a tar of HP's wdb from 1999, and even though that contains
local changes in the annotate code, this suppression seems borked
there too to me.
The original patch added a test to supposedly exercise this
suppression, but, it actually doesn't. It merely tests that
"breakpoints-invalid" is output after "stopped", but doesn't check
whether the duplicates supression actually works (IOW, check that only
_one_ annotation is seen). I was going to simply delete the tests
too, but a following patch will eliminate the duplicates in a
different way (which I needed for a different reason), so instead, I'm
making the tests actually fail if a duplicate annotation is seen.
Worry not, the test doesn't actually fail! The reason is that
breakpoint.c does:
else if (b->ignore_count > 0)
{
b->ignore_count--;
annotate_ignore_count_change ();
bs->stop = 0;
/* Increase the hit count even though we don't stop. */
++(b->hit_count);
observer_notify_breakpoint_modified (b);
}
where the annotate_ignore_count_change call is meant to inform the
"breakpoint_modified" annotation observer to ignore the notification.
All sounds good. But, the trouble is that nowadays annotate.c only
installs the observers if GDB is started with annotations enabled with
a command line option (gdb --annotate=2):
void
_initialize_annotate (void)
{
if (annotation_level == 2)
{
observer_attach_breakpoint_deleted (breakpoint_changed);
observer_attach_breakpoint_modified (breakpoint_changed);
}
}
and annota1.exp, to enable annotations, starts GDB normally, and
afterwards does "set annotate 2", so the observers aren't installed
when annota1.exp is run, and therefore changing the ignore count isn't
triggering any annotation at all...
gdb/
2013-01-22 Pedro Alves <palves@redhat.com>
* annotate.c (ignore_count_changed): Delete.
(annotate_breakpoints_changed): Don't clear ignore_count_changed.
(annotate_ignore_count_change): Delete.
(annotate_stopped): Don't emit a delayed breakpoints-changed
annotation.
* annotate.h (annotate_ignore_count_change): Delete.
* breakpoint.c (bpstat_check_breakpoint_conditions): Don't call
annotate_ignore_count_change.
gdb/testsuite/
2013-01-22 Pedro Alves <palves@redhat.com>
* gdb.base/annota1.exp (annotate ignore count change): Add
expected output for failure case.
103 lines
3.7 KiB
C
103 lines
3.7 KiB
C
/* Annotation routines for GDB.
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Copyright (C) 1986-2013 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "symtab.h"
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#include "gdbtypes.h"
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extern void annotate_breakpoints_changed (void);
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extern void annotate_breakpoint (int);
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extern void annotate_catchpoint (int);
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extern void annotate_watchpoint (int);
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extern void annotate_starting (void);
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extern void annotate_stopped (void);
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extern void annotate_exited (int);
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extern void annotate_signalled (void);
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extern void annotate_signal_name (void);
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extern void annotate_signal_name_end (void);
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extern void annotate_signal_string (void);
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extern void annotate_signal_string_end (void);
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extern void annotate_signal (void);
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extern void annotate_breakpoints_headers (void);
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extern void annotate_field (int);
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extern void annotate_breakpoints_table (void);
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extern void annotate_record (void);
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extern void annotate_breakpoints_table_end (void);
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extern void annotate_frames_invalid (void);
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extern void annotate_new_thread (void);
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extern void annotate_thread_changed (void);
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struct type;
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extern void annotate_field_begin (struct type *);
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extern void annotate_field_name_end (void);
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extern void annotate_field_value (void);
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extern void annotate_field_end (void);
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extern void annotate_quit (void);
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extern void annotate_error (void);
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extern void annotate_error_begin (void);
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extern void annotate_value_history_begin (int, struct type *);
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extern void annotate_value_begin (struct type *);
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extern void annotate_value_history_value (void);
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extern void annotate_value_history_end (void);
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extern void annotate_value_end (void);
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extern void annotate_display_begin (void);
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extern void annotate_display_number_end (void);
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extern void annotate_display_format (void);
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extern void annotate_display_expression (void);
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extern void annotate_display_expression_end (void);
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extern void annotate_display_value (void);
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extern void annotate_display_end (void);
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extern void annotate_arg_begin (void);
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extern void annotate_arg_name_end (void);
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extern void annotate_arg_value (struct type *);
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extern void annotate_arg_end (void);
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extern void annotate_source (char *, int, int, int,
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struct gdbarch *, CORE_ADDR);
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extern void annotate_frame_begin (int, struct gdbarch *, CORE_ADDR);
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extern void annotate_function_call (void);
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extern void annotate_signal_handler_caller (void);
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extern void annotate_frame_address (void);
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extern void annotate_frame_address_end (void);
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extern void annotate_frame_function_name (void);
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extern void annotate_frame_args (void);
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extern void annotate_frame_source_begin (void);
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extern void annotate_frame_source_file (void);
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extern void annotate_frame_source_file_end (void);
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extern void annotate_frame_source_line (void);
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extern void annotate_frame_source_end (void);
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extern void annotate_frame_where (void);
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extern void annotate_frame_end (void);
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extern void annotate_array_section_begin (int, struct type *);
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extern void annotate_elt_rep (unsigned int);
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extern void annotate_elt_rep_end (void);
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extern void annotate_elt (void);
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extern void annotate_array_section_end (void);
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extern void (*deprecated_annotate_signalled_hook) (void);
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extern void (*deprecated_annotate_signal_hook) (void);
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