From 454dafbdf2d1293a9b18a6fe9e9c9e0911eb740c Mon Sep 17 00:00:00 2001 From: Tom Tromey Date: Wed, 1 Nov 2017 22:32:45 -0600 Subject: [PATCH] Introduce gdb_breakpoint_up 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 * 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 --- gdb/ChangeLog | 24 ++++++++++++++++++++++++ gdb/arm-linux-tdep.c | 2 +- gdb/breakpoint.c | 35 +++++++++++------------------------ gdb/breakpoint.h | 20 ++++++++++++++------ gdb/elfread.c | 7 ++++--- gdb/infcall.c | 5 +++-- gdb/infcmd.c | 2 +- gdb/infrun.c | 9 +++++---- 8 files changed, 63 insertions(+), 41 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 04fee5e586..e309283d9c 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,27 @@ +2017-11-04 Tom Tromey + + * 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 * c-typeprint.c (c_type_print_base): Use gdb::unique_xmalloc_ptr. diff --git a/gdb/arm-linux-tdep.c b/gdb/arm-linux-tdep.c index 525474c4db..7769c9c2e2 100644 --- a/gdb/arm-linux-tdep.c +++ b/gdb/arm-linux-tdep.c @@ -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; diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c index 61e41283b1..adc8950591 100644 --- a/gdb/breakpoint.c +++ b/gdb/breakpoint.c @@ -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. */ diff --git a/gdb/breakpoint.h b/gdb/breakpoint.h index 69b63ea932..aa06d116a4 100644 --- a/gdb/breakpoint.h +++ b/gdb/breakpoint.h @@ -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 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 *); diff --git a/gdb/elfread.c b/gdb/elfread.c index 4e110716c3..cdef5a8c59 100644 --- a/gdb/elfread.c +++ b/gdb/elfread.c @@ -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; diff --git a/gdb/infcall.c b/gdb/infcall.c index 03749f3dc2..b06758085d 100644 --- a/gdb/infcall.c +++ b/gdb/infcall.c @@ -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; diff --git a/gdb/infcmd.c b/gdb/infcmd.c index 669631bdb4..49349c169e 100644 --- a/gdb/infcmd.c +++ b/gdb/infcmd.c @@ -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; diff --git a/gdb/infrun.c b/gdb/infrun.c index ef5a505d89..d425664957 100644 --- a/gdb/infrun.c +++ b/gdb/infrun.c @@ -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; }