diff options
Diffstat (limited to 'gdb/breakpoint.c')
| -rw-r--r-- | gdb/breakpoint.c | 95 |
1 files changed, 69 insertions, 26 deletions
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c index 1bc30bb4de3..1998acfd1e9 100644 --- a/gdb/breakpoint.c +++ b/gdb/breakpoint.c @@ -1507,6 +1507,31 @@ create_overlay_event_breakpoint (char *func_name) update_global_location_list (1); } +static void +create_longjmp_master_breakpoint (char *func_name) +{ + struct objfile *objfile; + + ALL_OBJFILES (objfile) + { + struct breakpoint *b; + struct minimal_symbol *m; + + if (!gdbarch_get_longjmp_target_p (get_objfile_arch (objfile))) + continue; + + m = lookup_minimal_symbol_text (func_name, objfile); + if (m == NULL) + continue; + + b = create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m), + bp_longjmp_master); + b->addr_string = xstrdup (func_name); + b->enable_state = bp_disabled; + } + update_global_location_list (1); +} + void update_breakpoints_after_exec (void) { @@ -1535,8 +1560,9 @@ update_breakpoints_after_exec (void) } /* Thread event breakpoints must be set anew after an exec(), - as must overlay event breakpoints. */ - if (b->type == bp_thread_event || b->type == bp_overlay_event) + as must overlay event and longjmp master breakpoints. */ + if (b->type == bp_thread_event || b->type == bp_overlay_event + || b->type == bp_longjmp_master) { delete_breakpoint (b); continue; @@ -1608,6 +1634,10 @@ update_breakpoints_after_exec (void) } /* FIXME what about longjmp breakpoints? Re-create them here? */ create_overlay_event_breakpoint ("_ovly_debug_event"); + create_longjmp_master_breakpoint ("longjmp"); + create_longjmp_master_breakpoint ("_longjmp"); + create_longjmp_master_breakpoint ("siglongjmp"); + create_longjmp_master_breakpoint ("_siglongjmp"); } int @@ -2426,6 +2456,12 @@ print_it_typical (bpstat bs) result = PRINT_NOTHING; break; + case bp_longjmp_master: + /* These should never be enabled. */ + printf_filtered (_("Longjmp Master Breakpoint: gdb should not stop!\n")); + result = PRINT_NOTHING; + break; + case bp_watchpoint: case bp_hardware_watchpoint: annotate_watchpoint (b->number); @@ -3119,7 +3155,8 @@ bpstat_stop_status (CORE_ADDR bp_addr, ptid_t ptid) if (!bs->stop) continue; - if (b->type == bp_thread_event || b->type == bp_overlay_event) + if (b->type == bp_thread_event || b->type == bp_overlay_event + || b->type == bp_longjmp_master) /* We do not stop for these. */ bs->stop = 0; else @@ -3403,6 +3440,7 @@ bpstat_what (bpstat bs) break; case bp_thread_event: case bp_overlay_event: + case bp_longjmp_master: bs_class = bp_nostop; break; case bp_catchpoint: @@ -3529,6 +3567,7 @@ print_one_breakpoint_location (struct breakpoint *b, {bp_shlib_event, "shlib events"}, {bp_thread_event, "thread events"}, {bp_overlay_event, "overlay events"}, + {bp_longjmp_master, "longjmp master"}, {bp_catchpoint, "catchpoint"}, {bp_tracepoint, "tracepoint"}, }; @@ -3657,6 +3696,7 @@ print_one_breakpoint_location (struct breakpoint *b, case bp_shlib_event: case bp_thread_event: case bp_overlay_event: + case bp_longjmp_master: case bp_tracepoint: if (opts.addressprint) { @@ -4274,6 +4314,7 @@ allocate_bp_location (struct breakpoint *bpt) case bp_shlib_event: case bp_thread_event: case bp_overlay_event: + case bp_longjmp_master: loc->loc_type = bp_loc_software_breakpoint; break; case bp_hardware_breakpoint: @@ -4428,32 +4469,26 @@ make_breakpoint_permanent (struct breakpoint *b) bl->inserted = 1; } -static void -create_longjmp_breakpoint (char *func_name) -{ - struct minimal_symbol *m; - - m = lookup_minimal_symbol_text (func_name, NULL); - if (m == NULL) - return; - set_momentary_breakpoint_at_pc (SYMBOL_VALUE_ADDRESS (m), bp_longjmp); - update_global_location_list (1); -} - /* Call this routine when stepping and nexting to enable a breakpoint - if we do a longjmp(). When we hit that breakpoint, call + if we do a longjmp() in THREAD. When we hit that breakpoint, call set_longjmp_resume_breakpoint() to figure out where we are going. */ void -set_longjmp_breakpoint (void) +set_longjmp_breakpoint (int thread) { - if (gdbarch_get_longjmp_target_p (current_gdbarch)) - { - create_longjmp_breakpoint ("longjmp"); - create_longjmp_breakpoint ("_longjmp"); - create_longjmp_breakpoint ("siglongjmp"); - create_longjmp_breakpoint ("_siglongjmp"); - } + struct breakpoint *b, *temp; + + /* To avoid having to rescan all objfile symbols at every step, + we maintain a list of continually-inserted but always disabled + longjmp "master" breakpoints. Here, we simply create momentary + clones of those and enable them for the requested thread. */ + ALL_BREAKPOINTS_SAFE (b, temp) + if (b->type == bp_longjmp_master) + { + struct breakpoint *clone = clone_momentary_breakpoint (b); + clone->type = bp_longjmp; + clone->thread = thread; + } } /* Delete all longjmp breakpoints from THREAD. */ @@ -5164,6 +5199,7 @@ mention (struct breakpoint *b) case bp_shlib_event: case bp_thread_event: case bp_overlay_event: + case bp_longjmp_master: break; } @@ -7432,6 +7468,7 @@ delete_command (char *arg, int from_tty) && b->type != bp_shlib_event && b->type != bp_thread_event && b->type != bp_overlay_event + && b->type != bp_longjmp_master && b->number >= 0) { breaks_to_delete = 1; @@ -7449,6 +7486,7 @@ delete_command (char *arg, int from_tty) && b->type != bp_shlib_event && b->type != bp_thread_event && b->type != bp_overlay_event + && b->type != bp_longjmp_master && b->number >= 0) delete_breakpoint (b); } @@ -7743,9 +7781,10 @@ breakpoint_re_set_one (void *bint) default: printf_filtered (_("Deleting unknown breakpoint type %d\n"), b->type); /* fall through */ - /* Delete overlay event breakpoints; they will be reset later by - breakpoint_re_set. */ + /* Delete overlay event and longjmp master breakpoints; they will be + reset later by breakpoint_re_set. */ case bp_overlay_event: + case bp_longjmp_master: delete_breakpoint (b); break; @@ -7797,6 +7836,10 @@ breakpoint_re_set (void) input_radix = save_input_radix; create_overlay_event_breakpoint ("_ovly_debug_event"); + create_longjmp_master_breakpoint ("longjmp"); + create_longjmp_master_breakpoint ("_longjmp"); + create_longjmp_master_breakpoint ("siglongjmp"); + create_longjmp_master_breakpoint ("_siglongjmp"); } /* Reset the thread number of this breakpoint: |