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[RFC] Keep breakpoints always inserted.
- From: Vladimir Prus <vladimir at codesourcery dot com>
- To: gdb-patches at sources dot redhat dot com
- Date: Sat, 1 Dec 2007 14:23:21 +0300
- Subject: [RFC] Keep breakpoints always inserted.
This patch makes breakpoint always inserted. There are not
regressions on x86. I think the patch is almost ready,
and comments are appreciated.
It's RFC, and not RFA because:
- There's no option to disable always-inserted mode
- I would like to add a separate option to report
breakpoint insert/remove operations, to facilitate testing
now and in future
- I just want the code to "soak" for about a week
Comments?
- Volodya
* breakpoint.h (bp_location_p): New typedef.
Register a vector of bp_location_p.
* breakpoint.c (unlink_locations_from_global_list):
Remove.
(update_global_location_list)
(update_global_location_list_nothrow): New.
(update_watchpoint): Don't free locations.
(should_insert_location): New.
(insert_bp_location): Use should_insert_location.
(insert_breakpoint_locations): Copied from
insert_breakpoints.
(insert_breakpoint): Use insert_breakpoint_locations.
(bpstat_stop_status): Call update_global_location_list
when disabling breakpoint.
(allocate_bp_location): Don't add to bp_location_chain.
(set_raw_breakpoint)
(create_longjmp_breakpoint, enable_longjmp_breakpoint)
(disable_longjmp_breakpoint, create_overlay_event_breakpoint)
(enable_overlay_breakpoints, disable_overlay_breakpoints)
(set_longjmp_resume_breakpoint)
(enable_watchpoints_after_interactive_call_stop)
(disable_watchpoints_before_interactive_call_start)
(create_internal_breakpoint)
(create_fork_vfork_event_catchpoint)
(create_exec_event_catchpoint, set_momentary_breakpoint)
(create_breakpoints, break_command_1, watch_command_1)
(create_exception_catchpoint)
(handle_gnu_v3_exceptions)
(disable_breakpoint, breakpoint_re_set_one)
(create_thread_event_breakpoint, create_solib_event_breakpoint)
(create_ada_exception_breakpoint): : Don't call check_duplicates.
Call update_global_location_list.
(delete_breakpoint): Don't remove locations and don't
try to reinsert them. Call update_global_location_list.
(update_breakpoint_locations): Likewise.
* infrun.c (proceed): Remove breakpoints while stepping
over breakpoint.
(handle_inferior_event): Don't remove or insert
breakpoints.
* linux-fork.c (checkpoint_command): Remove breakpoints
before fork and insert after.
(linux_fork_context): Remove breakpoints before switch
and insert after.
---
gdb/breakpoint.c | 345 +++++++++++++++++++++++++++---------------------------
gdb/breakpoint.h | 3 +
gdb/infrun.c | 37 ++----
gdb/linux-fork.c | 7 +
4 files changed, 194 insertions(+), 198 deletions(-)
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index 4365a3a..46e3c4a 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -205,11 +205,14 @@ static void mark_breakpoints_out (void);
static struct bp_location *
allocate_bp_location (struct breakpoint *bpt, enum bptype bp_type);
-static void
-unlink_locations_from_global_list (struct breakpoint *bpt);
+static void update_global_location_list (void);
-static int
-is_hardware_watchpoint (struct breakpoint *bpt);
+static void update_global_location_list_nothrow (void);
+
+static int is_hardware_watchpoint (struct breakpoint *bpt);
+
+static void
+insert_breakpoint_locations (void);
/* Prototypes for exported functions. */
@@ -829,14 +832,10 @@ update_watchpoint (struct breakpoint *b, int reparse)
struct bp_location *loc;
bpstat bs;
- unlink_locations_from_global_list (b);
- for (loc = b->loc; loc;)
- {
- struct bp_location *loc_next = loc->next;
- remove_breakpoint (loc, mark_uninserted);
- xfree (loc);
- loc = loc_next;
- }
+ /* We don't free locations. They are stored in
+ bp_location_chain and update_global_locations will
+ eventually delete them and remove breakpoints if
+ needed. */
b->loc = NULL;
if (b->disposition == disp_del_at_next_stop)
@@ -981,6 +980,20 @@ in which its expression is valid.\n"),
}
+/* Returns 1 iff breakpoint location should be
+ inserted in the inferior. */
+static int
+should_insert_location (struct bp_location *bpt)
+{
+ if (!breakpoint_enabled (bpt->owner))
+ return 0;
+
+ if (!bpt->enabled || bpt->shlib_disabled || bpt->inserted || bpt->duplicate)
+ return 0;
+
+ return 1;
+}
+
/* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
PROCESS_WARNING, and HW_BREAKPOINT_ERROR are used to report problems.
@@ -995,10 +1008,7 @@ insert_bp_location (struct bp_location *bpt,
{
int val = 0;
- if (!breakpoint_enabled (bpt->owner))
- return 0;
-
- if (!bpt->enabled || bpt->shlib_disabled || bpt->inserted || bpt->duplicate)
+ if (!should_insert_location (bpt))
return 0;
/* Initialize the target-specific information. */
@@ -1254,13 +1264,29 @@ Note: automatically using hardware breakpoints for read-only addresses.\n"));
return 0;
}
+/* Make sure all breakpoints are inserted in inferior.
+ Throws exception on any error.
+ A breakpoint that is already inserted won't be inserted
+ again, so calling this function twice is safe. */
+void
+insert_breakpoints (void)
+{
+ struct breakpoint *bpt;
+
+ ALL_BREAKPOINTS (bpt)
+ if (is_hardware_watchpoint (bpt))
+ update_watchpoint (bpt, 0 /* don't reparse. */);
+
+ update_global_location_list ();
+}
+
/* insert_breakpoints is used when starting or continuing the program.
remove_breakpoints is used when the program stops.
Both return zero if successful,
or an `errno' value if could not write the inferior. */
-void
-insert_breakpoints (void)
+static void
+insert_breakpoint_locations (void)
{
struct breakpoint *bpt;
struct bp_location *b, *temp;
@@ -1276,10 +1302,6 @@ insert_breakpoints (void)
/* Explicitly mark the warning -- this will only be printed if
there was an error. */
fprintf_unfiltered (tmp_error_stream, "Warning:\n");
-
- ALL_BREAKPOINTS (bpt)
- if (is_hardware_watchpoint (bpt))
- update_watchpoint (bpt, 0 /* don't reparse */);
ALL_BP_LOCATIONS_SAFE (b, temp)
{
@@ -3044,7 +3066,10 @@ bpstat_stop_status (CORE_ADDR bp_addr, ptid_t ptid)
{
/* We will stop here */
if (b->disposition == disp_disable)
- b->enable_state = bp_disabled;
+ {
+ b->enable_state = bp_disabled;
+ update_global_location_list ();
+ }
if (b->silent)
bs->print = 0;
bs->commands = b->commands;
@@ -4338,18 +4363,6 @@ allocate_bp_location (struct breakpoint *bpt, enum bptype bp_type)
internal_error (__FILE__, __LINE__, _("unknown breakpoint type"));
}
- /* Add this breakpoint to the end of the chain. */
-
- loc_p = bp_location_chain;
- if (loc_p == 0)
- bp_location_chain = loc;
- else
- {
- while (loc_p->global_next)
- loc_p = loc_p->global_next;
- loc_p->global_next = loc;
- }
-
return loc;
}
@@ -4357,6 +4370,10 @@ static void free_bp_location (struct bp_location *loc)
{
if (loc->cond)
xfree (loc->cond);
+
+ if (loc->function_name)
+ xfree (loc->function_name);
+
xfree (loc);
}
@@ -4461,7 +4478,6 @@ set_raw_breakpoint (struct symtab_and_line sal, enum bptype bptype)
set_breakpoint_location_function (b->loc);
- check_duplicates (b);
breakpoints_changed ();
return b;
@@ -4525,6 +4541,7 @@ create_longjmp_breakpoint (char *func_name)
b->silent = 1;
if (func_name)
b->addr_string = xstrdup (func_name);
+ update_global_location_list ();
}
/* Call this routine when stepping and nexting to enable a breakpoint
@@ -4540,7 +4557,7 @@ enable_longjmp_breakpoint (void)
if (b->type == bp_longjmp)
{
b->enable_state = bp_enabled;
- check_duplicates (b);
+ update_global_location_list ();
}
}
@@ -4554,7 +4571,7 @@ disable_longjmp_breakpoint (void)
|| b->type == bp_longjmp_resume)
{
b->enable_state = bp_disabled;
- check_duplicates (b);
+ update_global_location_list ();
}
}
@@ -4581,6 +4598,7 @@ create_overlay_event_breakpoint (char *func_name)
b->enable_state = bp_disabled;
overlay_events_enabled = 0;
}
+ update_global_location_list ();
}
void
@@ -4592,7 +4610,7 @@ enable_overlay_breakpoints (void)
if (b->type == bp_overlay_event)
{
b->enable_state = bp_enabled;
- check_duplicates (b);
+ update_global_location_list ();
overlay_events_enabled = 1;
}
}
@@ -4606,7 +4624,7 @@ disable_overlay_breakpoints (void)
if (b->type == bp_overlay_event)
{
b->enable_state = bp_disabled;
- check_duplicates (b);
+ update_global_location_list ();
overlay_events_enabled = 0;
}
}
@@ -4622,6 +4640,8 @@ create_thread_event_breakpoint (CORE_ADDR address)
/* addr_string has to be used or breakpoint_re_set will delete me. */
b->addr_string = xstrprintf ("*0x%s", paddr (b->loc->address));
+ update_global_location_list_nothrow ();
+
return b;
}
@@ -4666,6 +4686,7 @@ create_solib_event_breakpoint (CORE_ADDR address)
struct breakpoint *b;
b = create_internal_breakpoint (address, bp_shlib_event);
+ update_global_location_list_nothrow ();
return b;
}
@@ -4763,6 +4784,8 @@ create_fork_vfork_event_catchpoint (int tempflag, char *cond_string,
b->enable_state = bp_enabled;
b->disposition = tempflag ? disp_del : disp_donttouch;
b->forked_inferior_pid = 0;
+ update_global_location_list ();
+
mention (b);
}
@@ -4800,6 +4823,7 @@ create_exec_event_catchpoint (int tempflag, char *cond_string)
b->addr_string = NULL;
b->enable_state = bp_enabled;
b->disposition = tempflag ? disp_del : disp_donttouch;
+ update_global_location_list ();
mention (b);
}
@@ -4860,7 +4884,7 @@ set_longjmp_resume_breakpoint (CORE_ADDR pc, struct frame_id frame_id)
b->type);
b->enable_state = bp_enabled;
b->frame_id = frame_id;
- check_duplicates (b);
+ update_global_location_list ();
return;
}
}
@@ -4880,7 +4904,7 @@ disable_watchpoints_before_interactive_call_start (void)
&& breakpoint_enabled (b))
{
b->enable_state = bp_call_disabled;
- check_duplicates (b);
+ update_global_location_list ();
}
}
}
@@ -4900,7 +4924,7 @@ enable_watchpoints_after_interactive_call_stop (void)
&& (b->enable_state == bp_call_disabled))
{
b->enable_state = bp_enabled;
- check_duplicates (b);
+ update_global_location_list ();
}
}
}
@@ -4926,6 +4950,8 @@ set_momentary_breakpoint (struct symtab_and_line sal, struct frame_id frame_id,
if (in_thread_list (inferior_ptid))
b->thread = pid_to_thread_id (inferior_ptid);
+ update_global_location_list_nothrow ();
+
return b;
}
@@ -5331,6 +5357,8 @@ create_breakpoints (struct symtabs_and_lines sals, char **addr_string,
cond_string, type, disposition,
thread, ignore_count, from_tty);
}
+
+ update_global_location_list ();
}
/* Parse ARG which is assumed to be a SAL specification possibly
@@ -5632,6 +5660,8 @@ break_command_1 (char *arg, int flag, int from_tty)
b->ignore_count = ignore_count;
b->disposition = tempflag ? disp_del : disp_donttouch;
b->condition_not_parsed = 1;
+
+ update_global_location_list ();
mention (b);
}
@@ -6054,6 +6084,7 @@ watch_command_1 (char *arg, int accessflag, int from_tty)
value_free_to_mark (mark);
mention (b);
+ update_global_location_list ();
}
/* Return count of locations need to be watched and can be handled
@@ -6571,6 +6602,7 @@ create_exception_catchpoint (int tempflag, char *cond_string,
b->enable_state = bp_enabled;
b->disposition = tempflag ? disp_del : disp_donttouch;
mention (b);
+ update_global_location_list ();
}
static enum print_stop_action
@@ -6653,6 +6685,7 @@ handle_gnu_v3_exceptions (int tempflag, char *cond_string,
xfree (sals.sals);
mention (b);
+ update_global_location_list ();
return 1;
}
@@ -6738,6 +6771,7 @@ create_ada_exception_breakpoint (struct symtab_and_line sal,
b->ops = ops;
mention (b);
+ update_global_location_list ();
}
/* Implement the "catch exception" command. */
@@ -7076,33 +7110,104 @@ breakpoint_auto_delete (bpstat bs)
}
}
-/* Remove locations of breakpoint BPT from
- the global list of breakpoint locations. */
-
static void
-unlink_locations_from_global_list (struct breakpoint *bpt)
+update_global_location_list (void)
{
- /* This code assumes that the locations
- of a breakpoint are found in the global list
- in the same order, but not necessary adjacent. */
- struct bp_location **tmp = &bp_location_chain;
- struct bp_location *here = bpt->loc;
+ struct breakpoint *b;
+ struct bp_location **next = &bp_location_chain;
+ struct bp_location *loc;
+ struct bp_location *loc2;
+ struct gdb_exception e;
+ VEC(bp_location_p) *old_locations = NULL;
+ int ret;
+ int ix;
+
+ /* Store old locations for future reference. */
+ for (loc = bp_location_chain; loc; loc = loc->global_next)
+ VEC_safe_push (bp_location_p, old_locations, loc);
- if (here == NULL)
- return;
+ bp_location_chain = NULL;
+ ALL_BREAKPOINTS (b)
+ {
+ for (loc = b->loc; loc; loc = loc->next)
+ {
+ *next = loc;
+ next = &(loc->global_next);
+ *next = NULL;
+ }
+ }
- for (; *tmp && here;)
+ /* Identify bp_location instances that are not
+ longer present in the new list, and therefore should
+ be freed. Note that it's not necessary that those locations
+ should be removed from inferior -- if there's another
+ location at the same address (previously marked as duplicate),
+ we don't need to remove/insert the location. */
+ for (ix = 0; VEC_iterate(bp_location_p, old_locations, ix, loc); ++ix)
{
- if (*tmp == here)
+ int found_object = 0;
+ int found_address = 0;
+ for (loc2 = bp_location_chain; loc2; loc2 = loc2->global_next)
+ if (loc2 == loc)
+ {
+ found_object = 1;
+ break;
+ }
+
+ /* If this location is not longer present, and
+ inserted, look if there's maybe new location
+ at the same address. If so, mark that one
+ inserted, and don't remove this one.
+
+ This is needed so that we don't have a window
+ where a breakpoint at certian location is not
+ inserted. */
+ if (!found_object && loc->inserted)
{
- *tmp = here->global_next;
- here = here->next;
+ /* See if there's another location at the same
+ address, in which case we don't need to
+ remove this one. */
+ if (breakpoint_address_is_meaningful (loc->owner))
+ for (loc2 = bp_location_chain; loc2; loc2 = loc2->global_next)
+ {
+ /* For the sake of should_insert_location. The
+ call the check_duplicates will fix up this later. */
+ loc2->duplicate = 0;
+ if (should_insert_location (loc2)
+ && loc2 != loc && loc2->address == loc->address)
+ {
+ loc2->inserted = 1;
+ loc2->target_info = loc->target_info;
+ found_address = 1;
+ break;
+ }
+ }
}
- else
+
+ if (loc->inserted && !found_object && !found_address)
{
- tmp = &((*tmp)->global_next);
+ /* FIXME? Handle error? */
+ remove_breakpoint (loc, mark_uninserted);
}
+
+ if (!found_object)
+ free_bp_location (loc);
+ }
+
+ ALL_BREAKPOINTS (b)
+ {
+ check_duplicates (b);
}
+
+ insert_breakpoint_locations ();
+}
+
+static void
+update_global_location_list_nothrow (void)
+{
+ struct gdb_exception e;
+ TRY_CATCH (e, RETURN_MASK_ERROR)
+ update_global_location_list ();
}
/* Delete a breakpoint and clean up all traces of it in the data
@@ -7113,7 +7218,7 @@ delete_breakpoint (struct breakpoint *bpt)
{
struct breakpoint *b;
bpstat bs;
- struct bp_location *loc;
+ struct bp_location *loc, *next;
gdb_assert (bpt != NULL);
@@ -7137,18 +7242,6 @@ delete_breakpoint (struct breakpoint *bpt)
deprecated_delete_breakpoint_hook (bpt);
breakpoint_delete_event (bpt->number);
- for (loc = bpt->loc; loc; loc = loc->next)
- {
- if (loc->inserted)
- remove_breakpoint (loc, mark_inserted);
-
- if (loc->cond)
- xfree (loc->cond);
-
- if (loc->function_name)
- xfree (loc->function_name);
- }
-
if (breakpoint_chain == bpt)
breakpoint_chain = bpt->next;
@@ -7181,84 +7274,6 @@ delete_breakpoint (struct breakpoint *bpt)
break;
}
- unlink_locations_from_global_list (bpt);
-
- check_duplicates (bpt);
-
- if (bpt->type != bp_hardware_watchpoint
- && bpt->type != bp_read_watchpoint
- && bpt->type != bp_access_watchpoint
- && bpt->type != bp_catch_fork
- && bpt->type != bp_catch_vfork
- && bpt->type != bp_catch_exec)
- for (loc = bpt->loc; loc; loc = loc->next)
- {
- /* If this breakpoint location was inserted, and there is
- another breakpoint at the same address, we need to
- insert the other breakpoint. */
- if (loc->inserted)
- {
- struct bp_location *loc2;
- ALL_BP_LOCATIONS (loc2)
- if (loc2->address == loc->address
- && loc2->section == loc->section
- && !loc->duplicate
- && loc2->owner->enable_state != bp_disabled
- && loc2->enabled
- && !loc2->shlib_disabled
- && loc2->owner->enable_state != bp_call_disabled)
- {
- int val;
-
- /* We should never reach this point if there is a permanent
- breakpoint at the same address as the one being deleted.
- If there is a permanent breakpoint somewhere, it should
- always be the only one inserted. */
- if (loc2->owner->enable_state == bp_permanent)
- internal_error (__FILE__, __LINE__,
- _("another breakpoint was inserted on top of "
- "a permanent breakpoint"));
-
- memset (&loc2->target_info, 0, sizeof (loc2->target_info));
- loc2->target_info.placed_address = loc2->address;
- if (b->type == bp_hardware_breakpoint)
- val = target_insert_hw_breakpoint (&loc2->target_info);
- else
- val = target_insert_breakpoint (&loc2->target_info);
-
- /* If there was an error in the insert, print a message, then stop execution. */
- if (val != 0)
- {
- struct ui_file *tmp_error_stream = mem_fileopen ();
- make_cleanup_ui_file_delete (tmp_error_stream);
-
-
- if (b->type == bp_hardware_breakpoint)
- {
- fprintf_unfiltered (tmp_error_stream,
- "Cannot insert hardware breakpoint %d.\n"
- "You may have requested too many hardware breakpoints.\n",
- b->number);
- }
- else
- {
- fprintf_unfiltered (tmp_error_stream, "Cannot insert breakpoint %d.\n", b->number);
- fprintf_filtered (tmp_error_stream, "Error accessing memory address ");
- deprecated_print_address_numeric (loc2->address, 1, tmp_error_stream);
- fprintf_filtered (tmp_error_stream, ": %s.\n",
- safe_strerror (val));
- }
-
- fprintf_unfiltered (tmp_error_stream,"The same program may be running in another process.");
- target_terminal_ours_for_output ();
- error_stream(tmp_error_stream);
- }
- else
- loc2->inserted = 1;
- }
- }
- }
-
free_command_lines (&bpt->commands);
if (bpt->cond_string != NULL)
xfree (bpt->cond_string);
@@ -7299,13 +7314,9 @@ delete_breakpoint (struct breakpoint *bpt)
bp, we mark it as deleted before freeing its storage. */
bpt->type = bp_none;
- for (loc = bpt->loc; loc;)
- {
- struct bp_location *loc_next = loc->next;
- xfree (loc);
- loc = loc_next;
- }
xfree (bpt);
+
+ update_global_location_list ();
}
static void
@@ -7399,7 +7410,6 @@ update_breakpoint_locations (struct breakpoint *b,
if (all_locations_are_pending (existing_locations) && sals.nelts == 0)
return;
- unlink_locations_from_global_list (b);
b->loc = NULL;
for (i = 0; i < sals.nelts; ++i)
@@ -7459,12 +7469,7 @@ update_breakpoint_locations (struct breakpoint *b,
}
}
- while (existing_locations)
- {
- struct bp_location *next = existing_locations->next;
- free_bp_location (existing_locations);
- existing_locations = next;
- }
+ update_global_location_list ();
}
@@ -7560,10 +7565,6 @@ breakpoint_re_set_one (void *bint)
expanded = expand_line_sal_maybe (sals.sals[0]);
update_breakpoint_locations (b, expanded);
- /* Now that this is re-enabled, check_duplicates
- can be used. */
- check_duplicates (b);
-
xfree (sals.sals);
break;
@@ -7866,7 +7867,7 @@ disable_breakpoint (struct breakpoint *bpt)
bpt->enable_state = bp_disabled;
- check_duplicates (bpt);
+ update_global_location_list ();
if (deprecated_modify_breakpoint_hook)
deprecated_modify_breakpoint_hook (bpt);
@@ -7907,7 +7908,7 @@ disable_command (char *args, int from_tty)
struct bp_location *loc = find_location_by_number (args);
if (loc)
loc->enabled = 0;
- check_duplicates (loc->owner);
+ update_global_location_list ();
}
else
map_breakpoint_numbers (args, disable_breakpoint);
@@ -7992,7 +7993,7 @@ have been allocated for other watchpoints.\n"), bpt->number);
if (bpt->enable_state != bp_permanent)
bpt->enable_state = bp_enabled;
bpt->disposition = disposition;
- check_duplicates (bpt);
+ update_global_location_list ();
breakpoints_changed ();
if (deprecated_modify_breakpoint_hook)
@@ -8045,7 +8046,7 @@ enable_command (char *args, int from_tty)
struct bp_location *loc = find_location_by_number (args);
if (loc)
loc->enabled = 1;
- check_duplicates (loc->owner);
+ update_global_location_list ();
}
else
map_breakpoint_numbers (args, enable_breakpoint);
diff --git a/gdb/breakpoint.h b/gdb/breakpoint.h
index 9f98718..cedeb1c 100644
--- a/gdb/breakpoint.h
+++ b/gdb/breakpoint.h
@@ -338,6 +338,9 @@ enum watchpoint_triggered
watch_triggered_yes
};
+typedef struct bp_location *bp_location_p;
+DEF_VEC_P(bp_location_p);
+
/* Note that the ->silent field is not currently used by any commands
(though the code is in there if it was to be, and set_raw_breakpoint
does set it to 0). I implemented it because I thought it would be
diff --git a/gdb/infrun.c b/gdb/infrun.c
index 6c62b60..b87d14e 100644
--- a/gdb/infrun.c
+++ b/gdb/infrun.c
@@ -797,9 +797,17 @@ proceed (CORE_ADDR addr, enum target_signal siggnal, int step)
oneproc = 1;
if (oneproc)
- /* We will get a trace trap after one instruction.
- Continue it automatically and insert breakpoints then. */
- stepping_over_breakpoint = 1;
+ {
+ /* We will get a trace trap after one instruction.
+ Continue it automatically and insert breakpoints then. */
+ stepping_over_breakpoint = 1;
+ /* FIXME: if breakpoints are always inserted, we'll trap
+ if trying to single-step over breakpoint. Disable
+ all breakpoints. In future, we'd need to invent some
+ smart way of stepping over breakpoint instruction without
+ hitting breakpoint. */
+ remove_breakpoints ();
+ }
else
insert_breakpoints ();
@@ -1344,10 +1352,6 @@ handle_inferior_event (struct execution_control_state *ecs)
established. */
if (stop_soon == NO_STOP_QUIETLY)
{
- /* Remove breakpoints, SOLIB_ADD might adjust
- breakpoint addresses via breakpoint_re_set. */
- remove_breakpoints ();
-
/* Check for any newly added shared libraries if we're
supposed to be adding them automatically. Switch
terminal for any messages produced by
@@ -1387,9 +1391,6 @@ handle_inferior_event (struct execution_control_state *ecs)
/* NOTE drow/2007-05-11: This might be a good place to check
for "catch load". */
-
- /* Reinsert breakpoints and continue. */
- insert_breakpoints ();
}
/* If we are skipping through a shell, or through shared library
@@ -2236,10 +2237,6 @@ process_event_stop_test:
{
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_CHECK_SHLIBS\n");
- /* Remove breakpoints, we eventually want to step over the
- shlib event breakpoint, and SOLIB_ADD might adjust
- breakpoint addresses via breakpoint_re_set. */
- remove_breakpoints ();
/* Check for any newly added shared libraries if we're
supposed to be adding them automatically. Switch
@@ -3154,18 +3151,6 @@ normal_stop (void)
gdbarch_decr_pc_after_break needs to just go away. */
deprecated_update_frame_pc_hack (get_current_frame (), read_pc ());
- if (target_has_execution)
- {
- if (remove_breakpoints ())
- {
- target_terminal_ours_for_output ();
- printf_filtered (_("\
-Cannot remove breakpoints because program is no longer writable.\n\
-It might be running in another process.\n\
-Further execution is probably impossible.\n"));
- }
- }
-
/* Delete the breakpoint we stopped at, if it wants to be deleted.
Delete any breakpoint that is to be deleted at the next stop. */
diff --git a/gdb/linux-fork.c b/gdb/linux-fork.c
index 9c81d88..4e7e213 100644
--- a/gdb/linux-fork.c
+++ b/gdb/linux-fork.c
@@ -536,6 +536,10 @@ checkpoint_command (char *args, int from_tty)
/* Make this temp var static, 'cause it's used in the error context. */
static int temp_detach_fork;
+ /* Remove breakpoints, so that they are not inserted
+ in the forked process. */
+ remove_breakpoints ();
+
/* Make the inferior fork, record its (and gdb's) state. */
if (lookup_minimal_symbol ("fork", NULL, NULL) != NULL)
@@ -576,6 +580,7 @@ checkpoint_command (char *args, int from_tty)
if (!fp)
error (_("Failed to find new fork"));
fork_save_infrun_state (fp, 1);
+ insert_breakpoints ();
}
static void
@@ -593,7 +598,9 @@ linux_fork_context (struct fork_info *newfp, int from_tty)
oldfp = add_fork (ptid_get_pid (inferior_ptid));
fork_save_infrun_state (oldfp, 1);
+ remove_breakpoints ();
fork_load_infrun_state (newfp);
+ insert_breakpoints ();
printf_filtered (_("Switching to %s\n"),
target_pid_to_str (inferior_ptid));
--
1.5.3.5