diff options
Diffstat (limited to 'gdb/breakpoint.c')
| -rw-r--r-- | gdb/breakpoint.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c index 4340c5d..5394ae4 100644 --- a/gdb/breakpoint.c +++ b/gdb/breakpoint.c @@ -9490,6 +9490,35 @@ show_breakpoint_cmd (char *args, int from_tty) { } +/* Invalidate last known value of any hardware watchpoint if + the memory which that value represents has been written to by + GDB itself. */ + +static void +invalidate_bp_value_on_memory_change (CORE_ADDR addr, int len, + const bfd_byte *data) +{ + struct breakpoint *bp; + + ALL_BREAKPOINTS (bp) + if (bp->enable_state == bp_enabled + && bp->type == bp_hardware_watchpoint + && bp->val_valid && bp->val) + { + struct bp_location *loc; + + for (loc = bp->loc; loc != NULL; loc = loc->next) + if (loc->loc_type == bp_loc_hardware_watchpoint + && loc->address + loc->length > addr + && addr + len > loc->address) + { + value_free (bp->val); + bp->val = NULL; + bp->val_valid = 0; + } + } +} + /* Use default_breakpoint_'s, or nothing if they aren't valid. */ struct symtabs_and_lines @@ -10077,6 +10106,7 @@ _initialize_breakpoint (void) observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib); observer_attach_inferior_exit (clear_syscall_counts); + observer_attach_memory_changed (invalidate_bp_value_on_memory_change); breakpoint_chain = 0; /* Don't bother to call set_breakpoint_count. $bpnum isn't useful |