+/* Return true if it looks like target has stopped due to hitting
+ breakpoint location BL. This function does not check if we
+ should stop, only if BL explains the stop. */
+static int
+bpstat_check_location (const struct bp_location *bl, CORE_ADDR bp_addr)
+{
+ struct breakpoint *b = bl->owner;
+
+ if (b->type != bp_watchpoint
+ && b->type != bp_hardware_watchpoint
+ && b->type != bp_read_watchpoint
+ && b->type != bp_access_watchpoint
+ && b->type != bp_hardware_breakpoint
+ && b->type != bp_catch_fork
+ && b->type != bp_catch_vfork
+ && b->type != bp_catch_exec) /* a non-watchpoint bp */
+ {
+ if (bl->address != bp_addr) /* address doesn't match */
+ return 0;
+ if (overlay_debugging /* unmapped overlay section */
+ && section_is_overlay (bl->section)
+ && !section_is_mapped (bl->section))
+ return 0;
+ }
+
+ /* Continuable hardware watchpoints are treated as non-existent if the
+ reason we stopped wasn't a hardware watchpoint (we didn't stop on
+ some data address). Otherwise gdb won't stop on a break instruction
+ in the code (not from a breakpoint) when a hardware watchpoint has
+ been defined. Also skip watchpoints which we know did not trigger
+ (did not match the data address). */
+
+ if ((b->type == bp_hardware_watchpoint
+ || b->type == bp_read_watchpoint
+ || b->type == bp_access_watchpoint)
+ && b->watchpoint_triggered == watch_triggered_no)
+ return 0;
+
+ if (b->type == bp_hardware_breakpoint)
+ {
+ if (bl->address != bp_addr)
+ return 0;
+ if (overlay_debugging /* unmapped overlay section */
+ && section_is_overlay (bl->section)
+ && !section_is_mapped (bl->section))
+ return 0;
+ }
+
+ /* Is this a catchpoint of a load or unload? If so, did we
+ get a load or unload of the specified library? If not,
+ ignore it. */
+ if ((b->type == bp_catch_load)
+#if defined(SOLIB_HAVE_LOAD_EVENT)
+ && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid))
+ || ((b->dll_pathname != NULL)
+ && (strcmp (b->dll_pathname,
+ SOLIB_LOADED_LIBRARY_PATHNAME (
+ PIDGET (inferior_ptid)))
+ != 0)))
+#endif
+ )
+ return 0;
+
+ if ((b->type == bp_catch_unload)
+#if defined(SOLIB_HAVE_UNLOAD_EVENT)
+ && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid))
+ || ((b->dll_pathname != NULL)
+ && (strcmp (b->dll_pathname,
+ SOLIB_UNLOADED_LIBRARY_PATHNAME (
+ PIDGET (inferior_ptid)))
+ != 0)))
+#endif
+ )
+ return 0;
+
+ if ((b->type == bp_catch_fork)
+ && !inferior_has_forked (inferior_ptid,
+ &b->forked_inferior_pid))
+ return 0;
+
+ if ((b->type == bp_catch_vfork)
+ && !inferior_has_vforked (inferior_ptid,
+ &b->forked_inferior_pid))
+ return 0;
+
+ if ((b->type == bp_catch_exec)
+ && !inferior_has_execd (inferior_ptid, &b->exec_pathname))
+ return 0;
+
+ return 1;
+}
+
+/* If BS refers to a watchpoint, determine if the watched values
+ has actually changed, and we should stop. If not, set BS->stop
+ to 0. */
+static void
+bpstat_check_watchpoint (bpstat bs)
+{
+ const struct bp_location *bl = bs->breakpoint_at;
+ struct breakpoint *b = bl->owner;
+
+ if (b->type == bp_watchpoint
+ || b->type == bp_read_watchpoint
+ || b->type == bp_access_watchpoint
+ || b->type == bp_hardware_watchpoint)
+ {
+ CORE_ADDR addr;
+ struct value *v;
+ int must_check_value = 0;
+
+ if (b->type == bp_watchpoint)
+ /* For a software watchpoint, we must always check the
+ watched value. */
+ must_check_value = 1;
+ else if (b->watchpoint_triggered == watch_triggered_yes)
+ /* We have a hardware watchpoint (read, write, or access)
+ and the target earlier reported an address watched by
+ this watchpoint. */
+ must_check_value = 1;
+ else if (b->watchpoint_triggered == watch_triggered_unknown
+ && b->type == bp_hardware_watchpoint)
+ /* We were stopped by a hardware watchpoint, but the target could
+ not report the data address. We must check the watchpoint's
+ value. Access and read watchpoints are out of luck; without
+ a data address, we can't figure it out. */
+ must_check_value = 1;
+
+ if (must_check_value)
+ {
+ char *message = xstrprintf ("Error evaluating expression for watchpoint %d\n",
+ b->number);
+ struct cleanup *cleanups = make_cleanup (xfree, message);
+ int e = catch_errors (watchpoint_check, bs, message,
+ RETURN_MASK_ALL);
+ do_cleanups (cleanups);
+ switch (e)
+ {
+ case WP_DELETED:
+ /* We've already printed what needs to be printed. */
+ bs->print_it = print_it_done;
+ /* Stop. */
+ break;
+ case WP_VALUE_CHANGED:
+ if (b->type == bp_read_watchpoint)
+ {
+ /* Don't stop: read watchpoints shouldn't fire if
+ the value has changed. This is for targets
+ which cannot set read-only watchpoints. */
+ bs->print_it = print_it_noop;
+ bs->stop = 0;
+ }
+ break;
+ case WP_VALUE_NOT_CHANGED:
+ if (b->type == bp_hardware_watchpoint
+ || b->type == bp_watchpoint)
+ {
+ /* Don't stop: write watchpoints shouldn't fire if
+ the value hasn't changed. */
+ bs->print_it = print_it_noop;
+ bs->stop = 0;
+ }
+ /* Stop. */
+ break;
+ default:
+ /* Can't happen. */
+ case 0:
+ /* Error from catch_errors. */
+ printf_filtered (_("Watchpoint %d deleted.\n"), b->number);
+ if (b->related_breakpoint)
+ b->related_breakpoint->disposition = disp_del_at_next_stop;
+ b->disposition = disp_del_at_next_stop;
+ /* We've already printed what needs to be printed. */
+ bs->print_it = print_it_done;
+ break;
+ }
+ }
+ else /* must_check_value == 0 */
+ {
+ /* This is a case where some watchpoint(s) triggered, but
+ not at the address of this watchpoint, or else no
+ watchpoint triggered after all. So don't print
+ anything for this watchpoint. */
+ bs->print_it = print_it_noop;
+ bs->stop = 0;
+ }
+ }
+}
+
+
+/* Check conditions (condition proper, frame, thread and ignore count)
+ of breakpoint referred to by BS. If we should not stop for this
+ breakpoint, set BS->stop to 0. */
+static void
+bpstat_check_breakpoint_conditions (bpstat bs, ptid_t ptid)
+{
+ int thread_id = pid_to_thread_id (ptid);
+ const struct bp_location *bl = bs->breakpoint_at;
+ struct breakpoint *b = bl->owner;
+
+ if (frame_id_p (b->frame_id)
+ && !frame_id_eq (b->frame_id, get_frame_id (get_current_frame ())))
+ bs->stop = 0;
+ else if (bs->stop)
+ {
+ int value_is_zero = 0;
+
+ /* If this is a scope breakpoint, mark the associated
+ watchpoint as triggered so that we will handle the
+ out-of-scope event. We'll get to the watchpoint next
+ iteration. */
+ if (b->type == bp_watchpoint_scope)
+ b->related_breakpoint->watchpoint_triggered = watch_triggered_yes;
+
+ if (bl->cond && bl->owner->disposition != disp_del_at_next_stop)
+ {
+ /* Need to select the frame, with all that implies
+ so that the conditions will have the right context. */
+ select_frame (get_current_frame ());
+ value_is_zero
+ = catch_errors (breakpoint_cond_eval, (bl->cond),
+ "Error in testing breakpoint condition:\n",
+ RETURN_MASK_ALL);
+ /* FIXME-someday, should give breakpoint # */
+ free_all_values ();
+ }
+ if (bl->cond && value_is_zero)
+ {
+ bs->stop = 0;
+ }
+ else if (b->thread != -1 && b->thread != thread_id)
+ {
+ bs->stop = 0;
+ }
+ else if (b->ignore_count > 0)
+ {
+ b->ignore_count--;
+ annotate_ignore_count_change ();
+ bs->stop = 0;
+ /* Increase the hit count even though we don't
+ stop. */
+ ++(b->hit_count);
+ }
+ }
+}
+
+
projects / binutils.git / blobdiff