+\f
+/* Tell what to do about this bpstat. */
+struct bpstat_what
+bpstat_what (bs)
+ bpstat bs;
+{
+ /* Classify each bpstat as one of the following. */
+ enum class {
+ /* This bpstat element has no effect on the main_action. */
+ no_effect = 0,
+
+ /* There was a watchpoint, stop but don't print. */
+ wp_silent,
+
+ /* There was a watchpoint, stop and print. */
+ wp_noisy,
+
+ /* There was a breakpoint but we're not stopping. */
+ bp_nostop,
+
+ /* There was a breakpoint, stop but don't print. */
+ bp_silent,
+
+ /* There was a breakpoint, stop and print. */
+ bp_noisy,
+
+ /* We hit the longjmp breakpoint. */
+ long_jump,
+
+ /* We hit the longjmp_resume breakpoint. */
+ long_resume,
+
+ /* This is just used to count how many enums there are. */
+ class_last
+ };
+
+ /* Here is the table which drives this routine. So that we can
+ format it pretty, we define some abbreviations for the
+ enum bpstat_what codes. */
+#define keep_c BPSTAT_WHAT_KEEP_CHECKING
+#define stop_s BPSTAT_WHAT_STOP_SILENT
+#define stop_n BPSTAT_WHAT_STOP_NOISY
+#define single BPSTAT_WHAT_SINGLE
+#define setlr BPSTAT_WHAT_SET_LONGJMP_RESUME
+#define clrlr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
+#define clrlrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
+/* "Can't happen." Might want to print an error message.
+ abort() is not out of the question, but chances are GDB is just
+ a bit confused, not unusable. */
+#define err BPSTAT_WHAT_STOP_NOISY
+
+ /* Given an old action and a class, come up with a new action. */
+ /* One interesting property of this table is that wp_silent is the same
+ as bp_silent and wp_noisy is the same as bp_noisy. That is because
+ after stopping, the check for whether to step over a breakpoint
+ (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
+ reference to how we stopped. We retain separate wp_silent and bp_silent
+ codes in case we want to change that someday. */
+ static const enum bpstat_what_main_action
+ table[(int)class_last][(int)BPSTAT_WHAT_LAST] =
+ {
+ /* old action */
+ /* keep_c stop_s stop_n single setlr clrlr clrlrs */
+
+/*no_effect*/ {keep_c, stop_s, stop_n, single, setlr , clrlr , clrlrs},
+/*wp_silent*/ {stop_s, stop_s, stop_n, stop_s, stop_s, stop_s, stop_s},
+/*wp_noisy*/ {stop_n, stop_n, stop_n, stop_n, stop_n, stop_n, stop_n},
+/*bp_nostop*/ {single, stop_s, stop_n, single, setlr , clrlrs, clrlrs},
+/*bp_silent*/ {stop_s, stop_s, stop_n, stop_s, stop_s, stop_s, stop_s},
+/*bp_noisy*/ {stop_n, stop_n, stop_n, stop_n, stop_n, stop_n, stop_n},
+/*long_jump*/ {setlr , stop_s, stop_n, setlr , err , err , err },
+/*long_resume*/ {clrlr , stop_s, stop_n, clrlrs, err , err , err }
+ };
+#undef keep_c
+#undef stop_s
+#undef stop_n
+#undef single
+#undef setlr
+#undef clrlr
+#undef clrlrs
+#undef err
+ enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING;
+ struct bpstat_what retval;
+
+ retval.call_dummy = 0;
+ retval.step_resume = 0;
+ for (; bs != NULL; bs = bs->next)
+ {
+ enum class bs_class = no_effect;
+ if (bs->breakpoint_at == NULL)
+ /* I suspect this can happen if it was a momentary breakpoint
+ which has since been deleted. */
+ continue;
+ switch (bs->breakpoint_at->type)
+ {
+ case bp_breakpoint:
+ case bp_until:
+ case bp_finish:
+ if (bs->stop)
+ {
+ if (bs->print)
+ bs_class = bp_noisy;
+ else
+ bs_class = bp_silent;
+ }
+ else
+ bs_class = bp_nostop;
+ break;
+ case bp_watchpoint:
+ if (bs->stop)
+ {
+ if (bs->print)
+ bs_class = wp_noisy;
+ else
+ bs_class = wp_silent;
+ }
+ else
+ /* There was a watchpoint, but we're not stopping. This requires
+ no further action. */
+ bs_class = no_effect;
+ break;
+ case bp_longjmp:
+ bs_class = long_jump;
+ break;
+ case bp_longjmp_resume:
+ bs_class = long_resume;
+ break;
+ case bp_step_resume:
+#if 0
+ /* Need to temporarily disable this until we can fix the bug
+ with nexting over a breakpoint with ->stop clear causing
+ an infinite loop. For now, treat the breakpoint as having
+ been hit even if the frame is wrong. */
+ if (bs->stop)
+ {
+#endif
+ retval.step_resume = 1;
+ /* We don't handle this via the main_action. */
+ bs_class = no_effect;
+#if 0
+ }
+ else
+ /* It is for the wrong frame. */
+ bs_class = bp_nostop;
+#endif
+ break;
+ case bp_call_dummy:
+ /* Make sure the action is stop (silent or noisy), so infrun.c
+ pops the dummy frame. */
+ bs_class = bp_silent;
+ retval.call_dummy = 1;
+ break;
+ }
+ current_action = table[(int)bs_class][(int)current_action];
+ }
+ retval.main_action = current_action;
+ return retval;
+}