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* breakpoint.h (enum bptype): New type bp_through_sigtramp.

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(bpstat_what_main_action): New code BPSTAT_WHAT_THROUGH_SIGTRAMP.
	* breakpoint.c (bpstat_what): Return BPSTAT_WHAT_THROUGH_SIGTRAMP
	if we hit a bp_through_sigtramp breakpoint.  Remove kludge which
	ignored bs->stop for a bp_step_resume breakpoint.
	* infrun.c (wait_for_inferior): Make a through_sigtramp_breakpoint
	which performs one (the check_sigtramp2 one) of the functions
	which had been handled by the step_resume_breakpoint.  For each
	use of the step_resume_breakpoint, make it still use the
	step_resume_breakpoint, use the through_sigtramp_breakpoint, or
	operate on both.
	Deal with BPSTAT_WHAT_THROUGH_SIGTRAMP return from bpstat_what.
	When setting the frame address of the step resume breakpoint, set
	it to the address for frame *before* the call instruction is
	executed, not after.
This commit is contained in:
Jim Kingdon
1994-02-25 09:12:29 +00:00
parent 3fed1c4a60
commit bcc3771841
4 changed files with 140 additions and 64 deletions
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28
gdb/breakpoint.h
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@@ -49,6 +49,9 @@ enum bptype {
stepping over signal handlers, and for skipping prologues. */
bp_step_resume,
/* Used by wait_for_inferior for stepping over signal handlers. */
bp_through_sigtramp,
/* The breakpoint at the end of a call dummy. */
/* FIXME: What if the function we are calling longjmp()s out of the
call, or the user gets out with the "return" command? We currently
@@ -145,6 +148,8 @@ struct breakpoint
struct block *exp_valid_block;
/* Value of the watchpoint the last time we checked it. */
value val;
/* Thread number for thread-specific breakpoint, or -1 if don't care */
int thread;
};
/* The following stuff is an abstract data type "bpstat" ("breakpoint status").
@@ -205,23 +210,25 @@ enum bpstat_what_main_action {
/* Clear longjmp_resume breakpoint, then handle as BPSTAT_WHAT_SINGLE. */
BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE,
/* Clear step resume breakpoint, and keep checking. */
BPSTAT_WHAT_STEP_RESUME,
/* Clear through_sigtramp breakpoint, muck with trap_expected, and keep
checking. */
BPSTAT_WHAT_THROUGH_SIGTRAMP,
/* This is just used to keep track of how many enums there are. */
BPSTAT_WHAT_LAST
};
struct bpstat_what {
enum bpstat_what_main_action main_action : 4;
/* Did we hit the step resume breakpoint? This is separate from the
main_action to allow for it to be combined with any of the main
actions. */
unsigned int step_resume : 1;
enum bpstat_what_main_action main_action;
/* Did we hit a call dummy breakpoint? This only goes with a main_action
of BPSTAT_WHAT_STOP_SILENT or BPSTAT_WHAT_STOP_NOISY (the concept of
continuing from a call dummy without popping the frame is not a
useful one). */
unsigned int call_dummy : 1;
int call_dummy;
};
/* Tell what to do about this bpstat. */
@@ -292,8 +299,11 @@ struct bpstat
struct frame_info;
#endif
extern int
breakpoint_here_p PARAMS ((CORE_ADDR));
extern int breakpoint_here_p PARAMS ((CORE_ADDR));
extern int frame_in_dummy PARAMS ((struct frame_info *));
extern int breakpoint_thread_match PARAMS ((CORE_ADDR, int));
extern void
until_break_command PARAMS ((char *, int));