Sources Bugzilla – Bug 13866
crashes from stale frame_info *
Last modified: 2012-07-14 20:50:30 UTC
https://bugzilla.redhat.com/show_bug.cgi?id=804256 Even FSF GDB HEAD has still stale frame_info pointers: #1 in freehook (ptr=0xb3c45e0, caller=0x825759) at mcheck.c:211 #2 in xfree (ptr=0xb3c45e0) at ./common/common-utils.c:107 #3 in obstack_free (h=0x1d4ac20, obj=0x0) at obstack.c:367 #4 in reinit_frame_cache () at frame.c:1542 #5 in switch_to_thread (ptid=...) at thread.c:989 #6 in switch_to_program_space_and_thread (pspace=0x27c38a0) at progspace.c:494 #7 in skip_prologue_sal (sal=0x24ec190) at symtab.c:2694 #8 in decode_all_digits () at linespec.c:2523 #9 in decode_line_internal () at linespec.c:1132 #10 in decode_line_1 (flags=1default_line=81) at linespec.c:1344 #11 in until_break_command (arg="",from_tty=1,anywhere=0) at breakpoint.c:10532 There are currently too many situations with stale frame_info * after switch_to_* invalidate them now, IMO reinit_frame_cache needs to be removed in these simple cases.
CVSROOT: /cvs/src Module name: src Changes by: palves@sourceware.org 2012-06-05 19:50:51 Modified files: gdb : ChangeLog breakpoint.c Log message: 2012-06-05 Pedro Alves <palves@redhat.com> PR backtrace/13866 * breakpoint.c (until_break_command): Only fetch the selected frame after decode_line_1. Patches: http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/ChangeLog.diff?cvsroot=src&r1=1.14326&r2=1.14327 http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/breakpoint.c.diff?cvsroot=src&r1=1.678&r2=1.679
There are currently no known bugs anymore. Still some more proactive protection would be useful.
CVSROOT: /cvs/src Module name: src Changes by: macro@sourceware.org 2012-06-14 21:15:20 Modified files: gdb : ChangeLog infrun.c Log message: PR backtrace/13866 * infrun.c (handle_inferior_event): Re-fetch frame and gdbarch after hiding inline functions. Patches: http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/ChangeLog.diff?cvsroot=src&r1=1.14366&r2=1.14367 http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/infrun.c.diff?cvsroot=src&r1=1.544&r2=1.545