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Introduce gdb_breakpoint_up

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This introduces gdb_breakpoint_up, a unique_ptr typedef that owns a
breakpoint.  It then changes set_momentary_breakpoint to return a
gdb_breakpoint_up and fixes up the fallout.  This then allows the
removal of make_cleanup_delete_breakpoint.

Once breakpoints are fully C++-ified, this typedef can be removed in
favor of a plain std::unique_ptr.

gdb/ChangeLog
2017-11-04  Tom Tromey  <tom@tromey.com>

	* breakpoint.c (set_momentary_breakpoint): Return
	breakpoint_up.
	(until_break_command): Update.
	(new_until_break_fsm): Change argument types to
	breakpoint_up.
	(set_momentary_breakpoint_at_pc): Return breakpoint_up.
	(do_delete_breakpoint_cleanup, make_cleanup_delete_breakpoint):
	Remove.
	* infcmd.c (finish_forward): Update.
	* breakpoint.h (set_momentary_breakpoint)
	(set_momentary_breakpoint_at_pc): Return breakpoint_up.
	(make_cleanup_delete_breakpoint): Remove.
	(struct breakpoint_deleter): New.
	(breakpoint_up): New typedef.
	* infrun.c (insert_step_resume_breakpoint_at_sal_1): Update.
	(insert_exception_resume_breakpoint): Update.
	(insert_exception_resume_from_probe): Update.
	(insert_longjmp_resume_breakpoint): Update.
	* arm-linux-tdep.c (arm_linux_copy_svc): Update.
	* elfread.c (elf_gnu_ifunc_resolver_stop): Update.
	* infcall.c (call_function_by_hand_dummy): Update
This commit is contained in:
Tom Tromey 2017-11-01 22:32:45 -06:00
parent 331b71e5ee
commit 454dafbdf2
8 changed files with 63 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
gdb/ChangeLog
View File

@ -1,3 +1,27 @@
2017-11-04 Tom Tromey <tom@tromey.com>
* breakpoint.c (set_momentary_breakpoint): Return
breakpoint_up.
(until_break_command): Update.
(new_until_break_fsm): Change argument types to
breakpoint_up.
(set_momentary_breakpoint_at_pc): Return breakpoint_up.
(do_delete_breakpoint_cleanup, make_cleanup_delete_breakpoint):
Remove.
* infcmd.c (finish_forward): Update.
* breakpoint.h (set_momentary_breakpoint)
(set_momentary_breakpoint_at_pc): Return breakpoint_up.
(make_cleanup_delete_breakpoint): Remove.
(struct breakpoint_deleter): New.
(breakpoint_up): New typedef.
* infrun.c (insert_step_resume_breakpoint_at_sal_1): Update.
(insert_exception_resume_breakpoint): Update.
(insert_exception_resume_from_probe): Update.
(insert_longjmp_resume_breakpoint): Update.
* arm-linux-tdep.c (arm_linux_copy_svc): Update.
* elfread.c (elf_gnu_ifunc_resolver_stop): Update.
* infcall.c (call_function_by_hand_dummy): Update
2017-11-04 Tom Tromey <tom@tromey.com>
* c-typeprint.c (c_type_print_base): Use gdb::unique_xmalloc_ptr.

2
gdb/arm-linux-tdep.c
View File

@ -1020,7 +1020,7 @@ arm_linux_copy_svc (struct gdbarch *gdbarch, struct regcache *regs,
{
inferior_thread ()->control.step_resume_breakpoint
= set_momentary_breakpoint (gdbarch, sal, get_frame_id (frame),
bp_step_resume);
bp_step_resume).release ();
/* set_momentary_breakpoint invalidates FRAME. */
frame = NULL;

35
gdb/breakpoint.c
View File

@ -8582,7 +8582,7 @@ new_single_step_breakpoint (int thread, struct gdbarch *gdbarch)
SAL. If FRAME_ID is valid, the breakpoint is restricted to that
frame. */
struct breakpoint *
breakpoint_up
set_momentary_breakpoint (struct gdbarch *gdbarch, struct symtab_and_line sal,
struct frame_id frame_id, enum bptype type)
{
@ -8605,7 +8605,7 @@ set_momentary_breakpoint (struct gdbarch *gdbarch, struct symtab_and_line sal,
update_global_location_list_nothrow (UGLL_MAY_INSERT);
return b;
return breakpoint_up (b);
}
/* Make a momentary breakpoint based on the master breakpoint ORIG.
@ -8658,7 +8658,7 @@ clone_momentary_breakpoint (struct breakpoint *orig)
return momentary_breakpoint_from_master (orig, orig->type, orig->ops, 0);
}
struct breakpoint *
breakpoint_up
set_momentary_breakpoint_at_pc (struct gdbarch *gdbarch, CORE_ADDR pc,
enum bptype type)
{
@ -11146,8 +11146,8 @@ static struct thread_fsm_ops until_break_fsm_ops =
static struct until_break_fsm *
new_until_break_fsm (struct interp *cmd_interp, int thread,
struct breakpoint *location_breakpoint,
struct breakpoint *caller_breakpoint)
breakpoint_up &&location_breakpoint,
breakpoint_up &&caller_breakpoint)
{
struct until_break_fsm *sm;
@ -11155,8 +11155,8 @@ new_until_break_fsm (struct interp *cmd_interp, int thread,
thread_fsm_ctor (&sm->thread_fsm, &until_break_fsm_ops, cmd_interp);
sm->thread = thread;
sm->location_breakpoint = location_breakpoint;
sm->caller_breakpoint = caller_breakpoint;
sm->location_breakpoint = location_breakpoint.release ();
sm->caller_breakpoint = caller_breakpoint.release ();
return sm;
}
@ -11219,8 +11219,6 @@ until_break_command (const char *arg, int from_tty, int anywhere)
struct gdbarch *frame_gdbarch;
struct frame_id stack_frame_id;
struct frame_id caller_frame_id;
struct breakpoint *location_breakpoint;
struct breakpoint *caller_breakpoint = NULL;
struct cleanup *old_chain;
int thread;
struct thread_info *tp;
@ -11269,6 +11267,7 @@ until_break_command (const char *arg, int from_tty, int anywhere)
/* Keep within the current frame, or in frames called by the current
one. */
breakpoint_up caller_breakpoint;
if (frame_id_p (caller_frame_id))
{
struct symtab_and_line sal2;
@ -11281,7 +11280,6 @@ until_break_command (const char *arg, int from_tty, int anywhere)
sal2,
caller_frame_id,
bp_until);
make_cleanup_delete_breakpoint (caller_breakpoint);
set_longjmp_breakpoint (tp, caller_frame_id);
make_cleanup (delete_longjmp_breakpoint_cleanup, &thread);
@ -11290,6 +11288,7 @@ until_break_command (const char *arg, int from_tty, int anywhere)
/* set_momentary_breakpoint could invalidate FRAME. */
frame = NULL;
breakpoint_up location_breakpoint;
if (anywhere)
/* If the user told us to continue until a specified location,
we don't specify a frame at which we need to stop. */
@ -11300,10 +11299,10 @@ until_break_command (const char *arg, int from_tty, int anywhere)
only at the very same frame. */
location_breakpoint = set_momentary_breakpoint (frame_gdbarch, sal,
stack_frame_id, bp_until);
make_cleanup_delete_breakpoint (location_breakpoint);
sm = new_until_break_fsm (command_interp (), tp->global_num,
location_breakpoint, caller_breakpoint);
std::move (location_breakpoint),
std::move (caller_breakpoint));
tp->thread_fsm = &sm->thread_fsm;
discard_cleanups (old_chain);
@ -13366,18 +13365,6 @@ delete_breakpoint (struct breakpoint *bpt)
delete bpt;
}
static void
do_delete_breakpoint_cleanup (void *b)
{
delete_breakpoint ((struct breakpoint *) b);
}
struct cleanup *
make_cleanup_delete_breakpoint (struct breakpoint *b)
{
return make_cleanup (do_delete_breakpoint_cleanup, b);
}
/* Iterator function to call a user-provided callback function once
for each of B and its related breakpoints. */

20
gdb/breakpoint.h
View File

@ -1223,10 +1223,22 @@ extern void breakpoint_re_set (void);
extern void breakpoint_re_set_thread (struct breakpoint *);
extern struct breakpoint *set_momentary_breakpoint
extern void delete_breakpoint (struct breakpoint *);
struct breakpoint_deleter
{
void operator() (struct breakpoint *b) const
{
delete_breakpoint (b);
}
};
typedef std::unique_ptr<struct breakpoint, breakpoint_deleter> breakpoint_up;
extern breakpoint_up set_momentary_breakpoint
(struct gdbarch *, struct symtab_and_line, struct frame_id, enum bptype);
extern struct breakpoint *set_momentary_breakpoint_at_pc
extern breakpoint_up set_momentary_breakpoint_at_pc
(struct gdbarch *, CORE_ADDR pc, enum bptype type);
extern struct breakpoint *clone_momentary_breakpoint (struct breakpoint *bpkt);
@ -1235,10 +1247,6 @@ extern void set_ignore_count (int, int, int);
extern void breakpoint_init_inferior (enum inf_context);
extern struct cleanup *make_cleanup_delete_breakpoint (struct breakpoint *);
extern void delete_breakpoint (struct breakpoint *);
extern void breakpoint_auto_delete (bpstat);
typedef void (*walk_bp_location_callback) (struct bp_location *, void *);

7
gdb/elfread.c
View File

@ -923,9 +923,10 @@ elf_gnu_ifunc_resolver_stop (struct breakpoint *b)
sal.pc = prev_pc;
sal.section = find_pc_overlay (sal.pc);
sal.explicit_pc = 1;
b_return = set_momentary_breakpoint (get_frame_arch (prev_frame), sal,
prev_frame_id,
bp_gnu_ifunc_resolver_return);
b_return
= set_momentary_breakpoint (get_frame_arch (prev_frame), sal,
prev_frame_id,
bp_gnu_ifunc_resolver_return).release ();
/* set_momentary_breakpoint invalidates PREV_FRAME. */
prev_frame = NULL;

5
gdb/infcall.c
View File

@ -1100,8 +1100,9 @@ call_function_by_hand_dummy (struct value *function,
/* Sanity. The exact same SP value is returned by
PUSH_DUMMY_CALL, saved as the dummy-frame TOS, and used by
dummy_id to form the frame ID's stack address. */
breakpoint *bpt = set_momentary_breakpoint (gdbarch, sal,
dummy_id, bp_call_dummy);
breakpoint *bpt
= set_momentary_breakpoint (gdbarch, sal,
dummy_id, bp_call_dummy).release ();
/* set_momentary_breakpoint invalidates FRAME. */
frame = NULL;

2
gdb/infcmd.c
View File

@ -1986,7 +1986,7 @@ finish_forward (struct finish_command_fsm *sm, struct frame_info *frame)
sm->breakpoint = set_momentary_breakpoint (gdbarch, sal,
get_stack_frame_id (frame),
bp_finish);
bp_finish).release ();
/* set_momentary_breakpoint invalidates FRAME. */
frame = NULL;

9
gdb/infrun.c
View File

@ -7402,7 +7402,7 @@ insert_step_resume_breakpoint_at_sal_1 (struct gdbarch *gdbarch,
paddress (gdbarch, sr_sal.pc));
inferior_thread ()->control.step_resume_breakpoint
= set_momentary_breakpoint (gdbarch, sr_sal, sr_id, sr_type);
= set_momentary_breakpoint (gdbarch, sr_sal, sr_id, sr_type).release ();
}
void
@ -7491,7 +7491,7 @@ insert_longjmp_resume_breakpoint (struct gdbarch *gdbarch, CORE_ADDR pc)
paddress (gdbarch, pc));
inferior_thread ()->control.exception_resume_breakpoint =
set_momentary_breakpoint_at_pc (gdbarch, pc, bp_longjmp_resume);
set_momentary_breakpoint_at_pc (gdbarch, pc, bp_longjmp_resume).release ();
}
/* Insert an exception resume breakpoint. TP is the thread throwing
@ -7526,7 +7526,8 @@ insert_exception_resume_breakpoint (struct thread_info *tp,
(unsigned long) handler);
bp = set_momentary_breakpoint_at_pc (get_frame_arch (frame),
handler, bp_exception_resume);
handler,
bp_exception_resume).release ();
/* set_momentary_breakpoint_at_pc invalidates FRAME. */
frame = NULL;
@ -7567,7 +7568,7 @@ insert_exception_resume_from_probe (struct thread_info *tp,
handler));
bp = set_momentary_breakpoint_at_pc (get_frame_arch (frame),
handler, bp_exception_resume);
handler, bp_exception_resume).release ();
bp->thread = tp->global_num;
inferior_thread ()->control.exception_resume_breakpoint = bp;
}