diff options
Diffstat (limited to 'gdb/breakpoint.c')
| -rw-r--r-- | gdb/breakpoint.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c index 2415974..ab5f324 100644 --- a/gdb/breakpoint.c +++ b/gdb/breakpoint.c @@ -2744,11 +2744,23 @@ struct breakpoint_objfile_data /* Minimal symbol(s) for "longjmp", "siglongjmp", etc. (if any). */ struct minimal_symbol *longjmp_msym[NUM_LONGJMP_NAMES]; + /* True if we have looked for longjmp probes. */ + int longjmp_searched; + + /* SystemTap probe points for longjmp (if any). */ + VEC (probe_p) *longjmp_probes; + /* Minimal symbol for "std::terminate()" (if any). */ struct minimal_symbol *terminate_msym; /* Minimal symbol for "_Unwind_DebugHook" (if any). */ struct minimal_symbol *exception_msym; + + /* True if we have looked for exception probes. */ + int exception_searched; + + /* SystemTap probe points for unwinding (if any). */ + VEC (probe_p) *exception_probes; }; static const struct objfile_data *breakpoint_objfile_key; @@ -2785,6 +2797,15 @@ get_breakpoint_objfile_data (struct objfile *objfile) } static void +free_breakpoint_probes (struct objfile *obj, void *data) +{ + struct breakpoint_objfile_data *bp_objfile_data = data; + + VEC_free (probe_p, bp_objfile_data->longjmp_probes); + VEC_free (probe_p, bp_objfile_data->exception_probes); +} + +static void create_overlay_event_breakpoint (void) { struct objfile *objfile; @@ -2861,6 +2882,37 @@ create_longjmp_master_breakpoint (void) bp_objfile_data = get_breakpoint_objfile_data (objfile); + if (!bp_objfile_data->longjmp_searched) + { + bp_objfile_data->longjmp_probes + = find_probes_in_objfile (objfile, "libc", "longjmp"); + bp_objfile_data->longjmp_searched = 1; + } + + if (bp_objfile_data->longjmp_probes != NULL) + { + int i; + struct probe *probe; + struct gdbarch *gdbarch = get_objfile_arch (objfile); + + for (i = 0; + VEC_iterate (probe_p, + bp_objfile_data->longjmp_probes, + i, probe); + ++i) + { + struct breakpoint *b; + + b = create_internal_breakpoint (gdbarch, probe->address, + bp_longjmp_master, + &internal_breakpoint_ops); + b->addr_string = xstrdup ("-probe-stap libc:longjmp"); + b->enable_state = bp_disabled; + } + + continue; + } + for (i = 0; i < NUM_LONGJMP_NAMES; i++) { struct breakpoint *b; @@ -2971,6 +3023,40 @@ create_exception_master_breakpoint (void) bp_objfile_data = get_breakpoint_objfile_data (objfile); + /* We prefer the SystemTap probe point if it exists. */ + if (!bp_objfile_data->exception_searched) + { + bp_objfile_data->exception_probes + = find_probes_in_objfile (objfile, "libgcc", "unwind"); + bp_objfile_data->exception_searched = 1; + } + + if (bp_objfile_data->exception_probes != NULL) + { + struct gdbarch *gdbarch = get_objfile_arch (objfile); + int i; + struct probe *probe; + + for (i = 0; + VEC_iterate (probe_p, + bp_objfile_data->exception_probes, + i, probe); + ++i) + { + struct breakpoint *b; + + b = create_internal_breakpoint (gdbarch, probe->address, + bp_exception_master, + &internal_breakpoint_ops); + b->addr_string = xstrdup ("-probe-stap libgcc:unwind"); + b->enable_state = bp_disabled; + } + + continue; + } + + /* Otherwise, try the hook function. */ + if (msym_not_found_p (bp_objfile_data->exception_msym)) continue; |