1 /* Everything about breakpoints, for GDB.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
5 2008, 2009 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "arch-utils.h"
28 #include "breakpoint.h"
29 #include "tracepoint.h"
31 #include "expression.h"
37 #include "gdbthread.h"
40 #include "gdb_string.h"
47 #include "completer.h"
50 #include "cli/cli-script.h"
51 #include "gdb_assert.h"
56 #include "exceptions.h"
63 #include "xml-syscall.h"
65 /* readline include files */
66 #include "readline/readline.h"
67 #include "readline/history.h"
69 /* readline defines this. */
72 #include "mi/mi-common.h"
74 /* Arguments to pass as context to some catch command handlers. */
75 #define CATCH_PERMANENT ((void *) (uintptr_t) 0)
76 #define CATCH_TEMPORARY ((void *) (uintptr_t) 1)
78 /* Prototypes for local functions. */
80 static void enable_delete_command (char *, int);
82 static void enable_delete_breakpoint (struct breakpoint *);
84 static void enable_once_command (char *, int);
86 static void enable_once_breakpoint (struct breakpoint *);
88 static void disable_command (char *, int);
90 static void enable_command (char *, int);
92 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint *));
94 static void ignore_command (char *, int);
96 static int breakpoint_re_set_one (void *);
98 static void clear_command (char *, int);
100 static void catch_command (char *, int);
102 static void watch_command (char *, int);
104 static int can_use_hardware_watchpoint (struct value *);
106 static void break_command_1 (char *, int, int);
108 static void mention (struct breakpoint *);
110 /* This function is used in gdbtk sources and thus can not be made static. */
111 struct breakpoint *set_raw_breakpoint (struct gdbarch *gdbarch,
112 struct symtab_and_line,
115 static void breakpoint_adjustment_warning (CORE_ADDR, CORE_ADDR, int, int);
117 static CORE_ADDR adjust_breakpoint_address (struct gdbarch *gdbarch,
121 static void describe_other_breakpoints (struct gdbarch *,
122 struct program_space *, CORE_ADDR,
123 struct obj_section *, int);
125 static int breakpoint_address_match (struct address_space *aspace1,
127 struct address_space *aspace2,
130 static void breakpoints_info (char *, int);
132 static void breakpoint_1 (int, int);
134 static bpstat bpstat_alloc (const struct bp_location *, bpstat);
136 static int breakpoint_cond_eval (void *);
138 static void cleanup_executing_breakpoints (void *);
140 static void commands_command (char *, int);
142 static void condition_command (char *, int);
144 static int get_number_trailer (char **, int);
146 void set_breakpoint_count (int);
155 static int remove_breakpoint (struct bp_location *, insertion_state_t);
156 static int remove_breakpoint_1 (struct bp_location *, insertion_state_t);
158 static enum print_stop_action print_it_typical (bpstat);
160 static enum print_stop_action print_bp_stop_message (bpstat bs);
162 static int watchpoint_check (void *);
164 static void maintenance_info_breakpoints (char *, int);
166 static int hw_breakpoint_used_count (void);
168 static int hw_watchpoint_used_count (enum bptype, int *);
170 static void hbreak_command (char *, int);
172 static void thbreak_command (char *, int);
174 static void watch_command_1 (char *, int, int);
176 static void rwatch_command (char *, int);
178 static void awatch_command (char *, int);
180 static void do_enable_breakpoint (struct breakpoint *, enum bpdisp);
182 static void stop_command (char *arg, int from_tty);
184 static void stopin_command (char *arg, int from_tty);
186 static void stopat_command (char *arg, int from_tty);
188 static char *ep_parse_optional_if_clause (char **arg);
190 static char *ep_parse_optional_filename (char **arg);
192 static void catch_exception_command_1 (enum exception_event_kind ex_event,
193 char *arg, int tempflag, int from_tty);
195 static void tcatch_command (char *arg, int from_tty);
197 static void ep_skip_leading_whitespace (char **s);
199 static int single_step_breakpoint_inserted_here_p (struct address_space *,
202 static void free_bp_location (struct bp_location *loc);
204 static struct bp_location *allocate_bp_location (struct breakpoint *bpt);
206 static void update_global_location_list (int);
208 static void update_global_location_list_nothrow (int);
210 static int is_hardware_watchpoint (struct breakpoint *bpt);
212 static void insert_breakpoint_locations (void);
214 static int syscall_catchpoint_p (struct breakpoint *b);
216 static void tracepoints_info (char *, int);
218 static void delete_trace_command (char *, int);
220 static void enable_trace_command (char *, int);
222 static void disable_trace_command (char *, int);
224 static void trace_pass_command (char *, int);
226 static void skip_prologue_sal (struct symtab_and_line *sal);
229 /* Flag indicating that a command has proceeded the inferior past the
230 current breakpoint. */
232 static int breakpoint_proceeded;
235 bpdisp_text (enum bpdisp disp)
237 /* NOTE: the following values are a part of MI protocol and represent
238 values of 'disp' field returned when inferior stops at a breakpoint. */
239 static char *bpdisps[] = {"del", "dstp", "dis", "keep"};
240 return bpdisps[(int) disp];
243 /* Prototypes for exported functions. */
244 /* If FALSE, gdb will not use hardware support for watchpoints, even
245 if such is available. */
246 static int can_use_hw_watchpoints;
249 show_can_use_hw_watchpoints (struct ui_file *file, int from_tty,
250 struct cmd_list_element *c,
253 fprintf_filtered (file, _("\
254 Debugger's willingness to use watchpoint hardware is %s.\n"),
258 /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints.
259 If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints
260 for unrecognized breakpoint locations.
261 If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */
262 static enum auto_boolean pending_break_support;
264 show_pending_break_support (struct ui_file *file, int from_tty,
265 struct cmd_list_element *c,
268 fprintf_filtered (file, _("\
269 Debugger's behavior regarding pending breakpoints is %s.\n"),
273 /* If 1, gdb will automatically use hardware breakpoints for breakpoints
274 set with "break" but falling in read-only memory.
275 If 0, gdb will warn about such breakpoints, but won't automatically
276 use hardware breakpoints. */
277 static int automatic_hardware_breakpoints;
279 show_automatic_hardware_breakpoints (struct ui_file *file, int from_tty,
280 struct cmd_list_element *c,
283 fprintf_filtered (file, _("\
284 Automatic usage of hardware breakpoints is %s.\n"),
288 /* If on, gdb will keep breakpoints inserted even as inferior is
289 stopped, and immediately insert any new breakpoints. If off, gdb
290 will insert breakpoints into inferior only when resuming it, and
291 will remove breakpoints upon stop. If auto, GDB will behave as ON
292 if in non-stop mode, and as OFF if all-stop mode.*/
294 static const char always_inserted_auto[] = "auto";
295 static const char always_inserted_on[] = "on";
296 static const char always_inserted_off[] = "off";
297 static const char *always_inserted_enums[] = {
298 always_inserted_auto,
303 static const char *always_inserted_mode = always_inserted_auto;
305 show_always_inserted_mode (struct ui_file *file, int from_tty,
306 struct cmd_list_element *c, const char *value)
308 if (always_inserted_mode == always_inserted_auto)
309 fprintf_filtered (file, _("\
310 Always inserted breakpoint mode is %s (currently %s).\n"),
312 breakpoints_always_inserted_mode () ? "on" : "off");
314 fprintf_filtered (file, _("Always inserted breakpoint mode is %s.\n"), value);
318 breakpoints_always_inserted_mode (void)
320 return (always_inserted_mode == always_inserted_on
321 || (always_inserted_mode == always_inserted_auto && non_stop));
324 void _initialize_breakpoint (void);
326 /* Are we executing breakpoint commands? */
327 static int executing_breakpoint_commands;
329 /* Are overlay event breakpoints enabled? */
330 static int overlay_events_enabled;
332 /* Walk the following statement or block through all breakpoints.
333 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
336 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
338 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
339 for (B = breakpoint_chain; \
340 B ? (TMP=B->next, 1): 0; \
343 /* Similar iterator for the low-level breakpoints. SAFE variant is not
344 provided so update_global_location_list must not be called while executing
345 the block of ALL_BP_LOCATIONS. */
347 #define ALL_BP_LOCATIONS(B,BP_TMP) \
348 for (BP_TMP = bp_location; \
349 BP_TMP < bp_location + bp_location_count && (B = *BP_TMP); \
352 /* Iterator for tracepoints only. */
354 #define ALL_TRACEPOINTS(B) \
355 for (B = breakpoint_chain; B; B = B->next) \
356 if ((B)->type == bp_tracepoint)
358 /* Chains of all breakpoints defined. */
360 struct breakpoint *breakpoint_chain;
362 /* Array is sorted by bp_location_compare - primarily by the ADDRESS. */
364 static struct bp_location **bp_location;
366 /* Number of elements of BP_LOCATION. */
368 static unsigned bp_location_count;
370 /* Maximum alignment offset between bp_target_info.PLACED_ADDRESS and ADDRESS
371 for the current elements of BP_LOCATION which get a valid result from
372 bp_location_has_shadow. You can use it for roughly limiting the subrange of
373 BP_LOCATION to scan for shadow bytes for an address you need to read. */
375 static CORE_ADDR bp_location_placed_address_before_address_max;
377 /* Maximum offset plus alignment between
378 bp_target_info.PLACED_ADDRESS + bp_target_info.SHADOW_LEN and ADDRESS for
379 the current elements of BP_LOCATION which get a valid result from
380 bp_location_has_shadow. You can use it for roughly limiting the subrange of
381 BP_LOCATION to scan for shadow bytes for an address you need to read. */
383 static CORE_ADDR bp_location_shadow_len_after_address_max;
385 /* The locations that no longer correspond to any breakpoint,
386 unlinked from bp_location array, but for which a hit
387 may still be reported by a target. */
388 VEC(bp_location_p) *moribund_locations = NULL;
390 /* Number of last breakpoint made. */
392 int breakpoint_count;
394 /* Number of last tracepoint made. */
396 int tracepoint_count;
398 /* Return whether a breakpoint is an active enabled breakpoint. */
400 breakpoint_enabled (struct breakpoint *b)
402 return (b->enable_state == bp_enabled);
405 /* Set breakpoint count to NUM. */
408 set_breakpoint_count (int num)
410 breakpoint_count = num;
411 set_internalvar_integer (lookup_internalvar ("bpnum"), num);
414 /* Used in run_command to zero the hit count when a new run starts. */
417 clear_breakpoint_hit_counts (void)
419 struct breakpoint *b;
425 /* Default address, symtab and line to put a breakpoint at
426 for "break" command with no arg.
427 if default_breakpoint_valid is zero, the other three are
428 not valid, and "break" with no arg is an error.
430 This set by print_stack_frame, which calls set_default_breakpoint. */
432 int default_breakpoint_valid;
433 CORE_ADDR default_breakpoint_address;
434 struct symtab *default_breakpoint_symtab;
435 int default_breakpoint_line;
436 struct program_space *default_breakpoint_pspace;
439 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
440 Advance *PP after the string and any trailing whitespace.
442 Currently the string can either be a number or "$" followed by the name
443 of a convenience variable. Making it an expression wouldn't work well
444 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
446 If the string is a NULL pointer, that denotes the last breakpoint.
448 TRAILER is a character which can be found after the number; most
449 commonly this is `-'. If you don't want a trailer, use \0. */
451 get_number_trailer (char **pp, int trailer)
453 int retval = 0; /* default */
457 /* Empty line means refer to the last breakpoint. */
458 return breakpoint_count;
461 /* Make a copy of the name, so we can null-terminate it
462 to pass to lookup_internalvar(). */
467 while (isalnum (*p) || *p == '_')
469 varname = (char *) alloca (p - start + 1);
470 strncpy (varname, start, p - start);
471 varname[p - start] = '\0';
472 if (get_internalvar_integer (lookup_internalvar (varname), &val))
476 printf_filtered (_("Convenience variable must have integer value.\n"));
484 while (*p >= '0' && *p <= '9')
487 /* There is no number here. (e.g. "cond a == b"). */
489 /* Skip non-numeric token */
490 while (*p && !isspace((int) *p))
492 /* Return zero, which caller must interpret as error. */
498 if (!(isspace (*p) || *p == '\0' || *p == trailer))
500 /* Trailing junk: return 0 and let caller print error msg. */
501 while (!(isspace (*p) || *p == '\0' || *p == trailer))
512 /* Like get_number_trailer, but don't allow a trailer. */
514 get_number (char **pp)
516 return get_number_trailer (pp, '\0');
519 /* Parse a number or a range.
520 * A number will be of the form handled by get_number.
521 * A range will be of the form <number1> - <number2>, and
522 * will represent all the integers between number1 and number2,
525 * While processing a range, this fuction is called iteratively;
526 * At each call it will return the next value in the range.
528 * At the beginning of parsing a range, the char pointer PP will
529 * be advanced past <number1> and left pointing at the '-' token.
530 * Subsequent calls will not advance the pointer until the range
531 * is completed. The call that completes the range will advance
532 * pointer PP past <number2>.
536 get_number_or_range (char **pp)
538 static int last_retval, end_value;
539 static char *end_ptr;
540 static int in_range = 0;
544 /* Default case: pp is pointing either to a solo number,
545 or to the first number of a range. */
546 last_retval = get_number_trailer (pp, '-');
551 /* This is the start of a range (<number1> - <number2>).
552 Skip the '-', parse and remember the second number,
553 and also remember the end of the final token. */
557 while (isspace ((int) *end_ptr))
558 end_ptr++; /* skip white space */
559 end_value = get_number (temp);
560 if (end_value < last_retval)
562 error (_("inverted range"));
564 else if (end_value == last_retval)
566 /* degenerate range (number1 == number2). Advance the
567 token pointer so that the range will be treated as a
576 error (_("negative value"));
579 /* pp points to the '-' that betokens a range. All
580 number-parsing has already been done. Return the next
581 integer value (one greater than the saved previous value).
582 Do not advance the token pointer 'pp' until the end of range
585 if (++last_retval == end_value)
587 /* End of range reached; advance token pointer. */
595 /* Return the breakpoint with the specified number, or NULL
596 if the number does not refer to an existing breakpoint. */
599 get_breakpoint (int num)
601 struct breakpoint *b;
604 if (b->number == num)
611 /* condition N EXP -- set break condition of breakpoint N to EXP. */
614 condition_command (char *arg, int from_tty)
616 struct breakpoint *b;
621 error_no_arg (_("breakpoint number"));
624 bnum = get_number (&p);
626 error (_("Bad breakpoint argument: '%s'"), arg);
629 if (b->number == bnum)
631 struct bp_location *loc = b->loc;
632 for (; loc; loc = loc->next)
640 if (b->cond_string != NULL)
641 xfree (b->cond_string);
645 b->cond_string = NULL;
647 printf_filtered (_("Breakpoint %d now unconditional.\n"), bnum);
652 /* I don't know if it matters whether this is the string the user
653 typed in or the decompiled expression. */
654 b->cond_string = xstrdup (arg);
655 b->condition_not_parsed = 0;
656 for (loc = b->loc; loc; loc = loc->next)
660 parse_exp_1 (&arg, block_for_pc (loc->address), 0);
662 error (_("Junk at end of expression"));
665 breakpoints_changed ();
666 observer_notify_breakpoint_modified (b->number);
670 error (_("No breakpoint number %d."), bnum);
673 /* Set the command list of B to COMMANDS. */
676 breakpoint_set_commands (struct breakpoint *b, struct command_line *commands)
678 free_command_lines (&b->commands);
679 b->commands = commands;
680 breakpoints_changed ();
681 observer_notify_breakpoint_modified (b->number);
685 commands_command (char *arg, int from_tty)
687 struct breakpoint *b;
690 struct command_line *l;
692 /* If we allowed this, we would have problems with when to
693 free the storage, if we change the commands currently
696 if (executing_breakpoint_commands)
697 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
700 bnum = get_number (&p);
703 error (_("Unexpected extra arguments following breakpoint number."));
706 if (b->number == bnum)
708 char *tmpbuf = xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
710 struct cleanup *cleanups = make_cleanup (xfree, tmpbuf);
711 l = read_command_lines (tmpbuf, from_tty, 1);
712 do_cleanups (cleanups);
713 breakpoint_set_commands (b, l);
716 error (_("No breakpoint number %d."), bnum);
719 /* Like commands_command, but instead of reading the commands from
720 input stream, takes them from an already parsed command structure.
722 This is used by cli-script.c to DTRT with breakpoint commands
723 that are part of if and while bodies. */
724 enum command_control_type
725 commands_from_control_command (char *arg, struct command_line *cmd)
727 struct breakpoint *b;
731 /* If we allowed this, we would have problems with when to
732 free the storage, if we change the commands currently
735 if (executing_breakpoint_commands)
736 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
738 /* An empty string for the breakpoint number means the last
739 breakpoint, but get_number expects a NULL pointer. */
744 bnum = get_number (&p);
747 error (_("Unexpected extra arguments following breakpoint number."));
750 if (b->number == bnum)
752 free_command_lines (&b->commands);
753 if (cmd->body_count != 1)
754 error (_("Invalid \"commands\" block structure."));
755 /* We need to copy the commands because if/while will free the
756 list after it finishes execution. */
757 b->commands = copy_command_lines (cmd->body_list[0]);
758 breakpoints_changed ();
759 observer_notify_breakpoint_modified (b->number);
760 return simple_control;
762 error (_("No breakpoint number %d."), bnum);
765 /* Return non-zero if BL->TARGET_INFO contains valid information. */
768 bp_location_has_shadow (struct bp_location *bl)
770 if (bl->loc_type != bp_loc_software_breakpoint)
774 if (bl->target_info.shadow_len == 0)
775 /* bp isn't valid, or doesn't shadow memory. */
780 /* Update BUF, which is LEN bytes read from the target address MEMADDR,
781 by replacing any memory breakpoints with their shadowed contents.
783 The range of shadowed area by each bp_location is:
784 b->address - bp_location_placed_address_before_address_max
785 up to b->address + bp_location_shadow_len_after_address_max
786 The range we were requested to resolve shadows for is:
787 memaddr ... memaddr + len
788 Thus the safe cutoff boundaries for performance optimization are
789 memaddr + len <= b->address - bp_location_placed_address_before_address_max
791 b->address + bp_location_shadow_len_after_address_max <= memaddr */
794 breakpoint_restore_shadows (gdb_byte *buf, ULONGEST memaddr, LONGEST len)
796 /* Left boundary, right boundary and median element of our binary search. */
797 unsigned bc_l, bc_r, bc;
799 /* Find BC_L which is a leftmost element which may affect BUF content. It is
800 safe to report lower value but a failure to report higher one. */
803 bc_r = bp_location_count;
804 while (bc_l + 1 < bc_r)
806 struct bp_location *b;
808 bc = (bc_l + bc_r) / 2;
811 /* Check first B->ADDRESS will not overflow due to the added constant.
812 Then advance the left boundary only if we are sure the BC element can
813 in no way affect the BUF content (MEMADDR to MEMADDR + LEN range).
815 Use the BP_LOCATION_SHADOW_LEN_AFTER_ADDRESS_MAX safety offset so that
816 we cannot miss a breakpoint with its shadow range tail still reaching
819 if (b->address + bp_location_shadow_len_after_address_max >= b->address
820 && b->address + bp_location_shadow_len_after_address_max <= memaddr)
826 /* Now do full processing of the found relevant range of elements. */
828 for (bc = bc_l; bc < bp_location_count; bc++)
830 struct bp_location *b = bp_location[bc];
831 CORE_ADDR bp_addr = 0;
835 if (b->owner->type == bp_none)
836 warning (_("reading through apparently deleted breakpoint #%d?"),
839 /* Performance optimization: any futher element can no longer affect BUF
842 if (b->address >= bp_location_placed_address_before_address_max
843 && memaddr + len <= b->address
844 - bp_location_placed_address_before_address_max)
847 if (!bp_location_has_shadow (b))
849 if (!breakpoint_address_match (b->target_info.placed_address_space, 0,
850 current_program_space->aspace, 0))
853 /* Addresses and length of the part of the breakpoint that
855 bp_addr = b->target_info.placed_address;
856 bp_size = b->target_info.shadow_len;
858 if (bp_addr + bp_size <= memaddr)
859 /* The breakpoint is entirely before the chunk of memory we
863 if (bp_addr >= memaddr + len)
864 /* The breakpoint is entirely after the chunk of memory we are
868 /* Offset within shadow_contents. */
869 if (bp_addr < memaddr)
871 /* Only copy the second part of the breakpoint. */
872 bp_size -= memaddr - bp_addr;
873 bptoffset = memaddr - bp_addr;
877 if (bp_addr + bp_size > memaddr + len)
879 /* Only copy the first part of the breakpoint. */
880 bp_size -= (bp_addr + bp_size) - (memaddr + len);
883 memcpy (buf + bp_addr - memaddr,
884 b->target_info.shadow_contents + bptoffset, bp_size);
889 /* A wrapper function for inserting catchpoints. */
891 insert_catchpoint (struct ui_out *uo, void *args)
893 struct breakpoint *b = (struct breakpoint *) args;
896 gdb_assert (b->type == bp_catchpoint);
897 gdb_assert (b->ops != NULL && b->ops->insert != NULL);
903 is_hardware_watchpoint (struct breakpoint *bpt)
905 return (bpt->type == bp_hardware_watchpoint
906 || bpt->type == bp_read_watchpoint
907 || bpt->type == bp_access_watchpoint);
910 /* Find the current value of a watchpoint on EXP. Return the value in
911 *VALP and *RESULTP and the chain of intermediate and final values
912 in *VAL_CHAIN. RESULTP and VAL_CHAIN may be NULL if the caller does
915 If a memory error occurs while evaluating the expression, *RESULTP will
916 be set to NULL. *RESULTP may be a lazy value, if the result could
917 not be read from memory. It is used to determine whether a value
918 is user-specified (we should watch the whole value) or intermediate
919 (we should watch only the bit used to locate the final value).
921 If the final value, or any intermediate value, could not be read
922 from memory, *VALP will be set to NULL. *VAL_CHAIN will still be
923 set to any referenced values. *VALP will never be a lazy value.
924 This is the value which we store in struct breakpoint.
926 If VAL_CHAIN is non-NULL, *VAL_CHAIN will be released from the
927 value chain. The caller must free the values individually. If
928 VAL_CHAIN is NULL, all generated values will be left on the value
932 fetch_watchpoint_value (struct expression *exp, struct value **valp,
933 struct value **resultp, struct value **val_chain)
935 struct value *mark, *new_mark, *result;
936 volatile struct gdb_exception ex;
944 /* Evaluate the expression. */
945 mark = value_mark ();
948 TRY_CATCH (ex, RETURN_MASK_ALL)
950 result = evaluate_expression (exp);
954 /* Ignore memory errors, we want watchpoints pointing at
955 inaccessible memory to still be created; otherwise, throw the
956 error to some higher catcher. */
962 throw_exception (ex);
967 new_mark = value_mark ();
968 if (mark == new_mark)
973 /* Make sure it's not lazy, so that after the target stops again we
974 have a non-lazy previous value to compare with. */
976 && (!value_lazy (result) || gdb_value_fetch_lazy (result)))
981 /* Return the chain of intermediate values. We use this to
982 decide which addresses to watch. */
983 *val_chain = new_mark;
984 value_release_to_mark (mark);
988 /* Assuming that B is a watchpoint: returns true if the current thread
989 and its running state are safe to evaluate or update watchpoint B.
990 Watchpoints on local expressions need to be evaluated in the
991 context of the thread that was current when the watchpoint was
992 created, and, that thread needs to be stopped to be able to select
993 the correct frame context. Watchpoints on global expressions can
994 be evaluated on any thread, and in any state. It is presently left
995 to the target allowing memory accesses when threads are
999 watchpoint_in_thread_scope (struct breakpoint *b)
1001 return (ptid_equal (b->watchpoint_thread, null_ptid)
1002 || (ptid_equal (inferior_ptid, b->watchpoint_thread)
1003 && !is_executing (inferior_ptid)));
1006 /* Assuming that B is a watchpoint:
1007 - Reparse watchpoint expression, if REPARSE is non-zero
1008 - Evaluate expression and store the result in B->val
1009 - Evaluate the condition if there is one, and store the result
1011 - Update the list of values that must be watched in B->loc.
1013 If the watchpoint disposition is disp_del_at_next_stop, then do nothing.
1014 If this is local watchpoint that is out of scope, delete it.
1016 Even with `set breakpoint always-inserted on' the watchpoints are removed
1017 + inserted on each stop here. Normal breakpoints must never be removed
1018 because they might be missed by a running thread when debugging in non-stop
1019 mode. On the other hand, hardware watchpoints (is_hardware_watchpoint;
1020 processed here) are specific to each LWP since they are stored in each LWP's
1021 hardware debug registers. Therefore, such LWP must be stopped first in
1022 order to be able to modify its hardware watchpoints.
1024 Hardware watchpoints must be reset exactly once after being presented to the
1025 user. It cannot be done sooner, because it would reset the data used to
1026 present the watchpoint hit to the user. And it must not be done later
1027 because it could display the same single watchpoint hit during multiple GDB
1028 stops. Note that the latter is relevant only to the hardware watchpoint
1029 types bp_read_watchpoint and bp_access_watchpoint. False hit by
1030 bp_hardware_watchpoint is not user-visible - its hit is suppressed if the
1031 memory content has not changed.
1033 The following constraints influence the location where we can reset hardware
1036 * target_stopped_by_watchpoint and target_stopped_data_address are called
1037 several times when GDB stops.
1040 * Multiple hardware watchpoints can be hit at the same time, causing GDB to
1041 stop. GDB only presents one hardware watchpoint hit at a time as the
1042 reason for stopping, and all the other hits are presented later, one after
1043 the other, each time the user requests the execution to be resumed.
1044 Execution is not resumed for the threads still having pending hit event
1045 stored in LWP_INFO->STATUS. While the watchpoint is already removed from
1046 the inferior on the first stop the thread hit event is kept being reported
1047 from its cached value by linux_nat_stopped_data_address until the real
1048 thread resume happens after the watchpoint gets presented and thus its
1049 LWP_INFO->STATUS gets reset.
1051 Therefore the hardware watchpoint hit can get safely reset on the watchpoint
1052 removal from inferior. */
1055 update_watchpoint (struct breakpoint *b, int reparse)
1057 int within_current_scope;
1058 struct frame_id saved_frame_id;
1059 struct bp_location *loc;
1063 /* If this is a local watchpoint, we only want to check if the
1064 watchpoint frame is in scope if the current thread is the thread
1065 that was used to create the watchpoint. */
1066 if (!watchpoint_in_thread_scope (b))
1069 /* We don't free locations. They are stored in bp_location array and
1070 update_global_locations will eventually delete them and remove
1071 breakpoints if needed. */
1074 if (b->disposition == disp_del_at_next_stop)
1079 /* Determine if the watchpoint is within scope. */
1080 if (b->exp_valid_block == NULL)
1081 within_current_scope = 1;
1084 struct frame_info *fi;
1086 /* Save the current frame's ID so we can restore it after
1087 evaluating the watchpoint expression on its own frame. */
1088 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
1089 took a frame parameter, so that we didn't have to change the
1092 saved_frame_id = get_frame_id (get_selected_frame (NULL));
1094 fi = frame_find_by_id (b->watchpoint_frame);
1095 within_current_scope = (fi != NULL);
1096 if (within_current_scope)
1100 if (within_current_scope && reparse)
1109 b->exp = parse_exp_1 (&s, b->exp_valid_block, 0);
1110 /* If the meaning of expression itself changed, the old value is
1111 no longer relevant. We don't want to report a watchpoint hit
1112 to the user when the old value and the new value may actually
1113 be completely different objects. */
1114 value_free (b->val);
1119 /* If we failed to parse the expression, for example because
1120 it refers to a global variable in a not-yet-loaded shared library,
1121 don't try to insert watchpoint. We don't automatically delete
1122 such watchpoint, though, since failure to parse expression
1123 is different from out-of-scope watchpoint. */
1124 if ( !target_has_execution)
1126 /* Without execution, memory can't change. No use to try and
1127 set watchpoint locations. The watchpoint will be reset when
1128 the target gains execution, through breakpoint_re_set. */
1130 else if (within_current_scope && b->exp)
1132 struct value *val_chain, *v, *result, *next;
1133 struct program_space *frame_pspace;
1135 fetch_watchpoint_value (b->exp, &v, &result, &val_chain);
1137 /* Avoid setting b->val if it's already set. The meaning of
1138 b->val is 'the last value' user saw, and we should update
1139 it only if we reported that last value to user. As it
1140 happens, the code that reports it updates b->val directly. */
1147 /* Change the type of breakpoint between hardware assisted or an
1148 ordinary watchpoint depending on the hardware support and free
1149 hardware slots. REPARSE is set when the inferior is started. */
1150 if ((b->type == bp_watchpoint || b->type == bp_hardware_watchpoint)
1153 int i, mem_cnt, other_type_used;
1155 i = hw_watchpoint_used_count (bp_hardware_watchpoint,
1157 mem_cnt = can_use_hardware_watchpoint (val_chain);
1160 b->type = bp_watchpoint;
1163 int target_resources_ok = target_can_use_hardware_watchpoint
1164 (bp_hardware_watchpoint, i + mem_cnt, other_type_used);
1165 if (target_resources_ok <= 0)
1166 b->type = bp_watchpoint;
1168 b->type = bp_hardware_watchpoint;
1172 frame_pspace = get_frame_program_space (get_selected_frame (NULL));
1174 /* Look at each value on the value chain. */
1175 for (v = val_chain; v; v = next)
1177 /* If it's a memory location, and GDB actually needed
1178 its contents to evaluate the expression, then we
1179 must watch it. If the first value returned is
1180 still lazy, that means an error occurred reading it;
1181 watch it anyway in case it becomes readable. */
1182 if (VALUE_LVAL (v) == lval_memory
1183 && (v == val_chain || ! value_lazy (v)))
1185 struct type *vtype = check_typedef (value_type (v));
1187 /* We only watch structs and arrays if user asked
1188 for it explicitly, never if they just happen to
1189 appear in the middle of some value chain. */
1191 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
1192 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
1196 struct bp_location *loc, **tmp;
1198 addr = value_address (v);
1199 len = TYPE_LENGTH (value_type (v));
1201 if (b->type == bp_read_watchpoint)
1203 else if (b->type == bp_access_watchpoint)
1206 loc = allocate_bp_location (b);
1207 for (tmp = &(b->loc); *tmp != NULL; tmp = &((*tmp)->next))
1210 loc->gdbarch = get_type_arch (value_type (v));
1212 loc->pspace = frame_pspace;
1213 loc->address = addr;
1215 loc->watchpoint_type = type;
1219 next = value_next (v);
1224 /* We just regenerated the list of breakpoint locations.
1225 The new location does not have its condition field set to anything
1226 and therefore, we must always reparse the cond_string, independently
1227 of the value of the reparse flag. */
1228 if (b->cond_string != NULL)
1230 char *s = b->cond_string;
1231 b->loc->cond = parse_exp_1 (&s, b->exp_valid_block, 0);
1234 else if (!within_current_scope)
1236 printf_filtered (_("\
1237 Watchpoint %d deleted because the program has left the block \n\
1238 in which its expression is valid.\n"),
1240 if (b->related_breakpoint)
1241 b->related_breakpoint->disposition = disp_del_at_next_stop;
1242 b->disposition = disp_del_at_next_stop;
1245 /* Restore the selected frame. */
1247 select_frame (frame_find_by_id (saved_frame_id));
1251 /* Returns 1 iff breakpoint location should be
1252 inserted in the inferior. */
1254 should_be_inserted (struct bp_location *bpt)
1256 if (!breakpoint_enabled (bpt->owner))
1259 if (bpt->owner->disposition == disp_del_at_next_stop)
1262 if (!bpt->enabled || bpt->shlib_disabled || bpt->duplicate)
1265 /* This is set for example, when we're attached to the parent of a
1266 vfork, and have detached from the child. The child is running
1267 free, and we expect it to do an exec or exit, at which point the
1268 OS makes the parent schedulable again (and the target reports
1269 that the vfork is done). Until the child is done with the shared
1270 memory region, do not insert breakpoints in the parent, otherwise
1271 the child could still trip on the parent's breakpoints. Since
1272 the parent is blocked anyway, it won't miss any breakpoint. */
1273 if (bpt->pspace->breakpoints_not_allowed)
1276 /* Tracepoints are inserted by the target at a time of its choosing,
1278 if (bpt->owner->type == bp_tracepoint)
1284 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
1285 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
1286 and HW_BREAKPOINT_ERROR are used to report problems.
1288 NOTE drow/2003-09-09: This routine could be broken down to an object-style
1289 method for each breakpoint or catchpoint type. */
1291 insert_bp_location (struct bp_location *bpt,
1292 struct ui_file *tmp_error_stream,
1293 int *disabled_breaks,
1294 int *hw_breakpoint_error)
1298 if (!should_be_inserted (bpt) || bpt->inserted)
1301 /* Initialize the target-specific information. */
1302 memset (&bpt->target_info, 0, sizeof (bpt->target_info));
1303 bpt->target_info.placed_address = bpt->address;
1304 bpt->target_info.placed_address_space = bpt->pspace->aspace;
1306 if (bpt->loc_type == bp_loc_software_breakpoint
1307 || bpt->loc_type == bp_loc_hardware_breakpoint)
1309 if (bpt->owner->type != bp_hardware_breakpoint)
1311 /* If the explicitly specified breakpoint type
1312 is not hardware breakpoint, check the memory map to see
1313 if the breakpoint address is in read only memory or not.
1314 Two important cases are:
1315 - location type is not hardware breakpoint, memory
1316 is readonly. We change the type of the location to
1317 hardware breakpoint.
1318 - location type is hardware breakpoint, memory is read-write.
1319 This means we've previously made the location hardware one, but
1320 then the memory map changed, so we undo.
1322 When breakpoints are removed, remove_breakpoints will
1323 use location types we've just set here, the only possible
1324 problem is that memory map has changed during running program,
1325 but it's not going to work anyway with current gdb. */
1326 struct mem_region *mr
1327 = lookup_mem_region (bpt->target_info.placed_address);
1331 if (automatic_hardware_breakpoints)
1334 enum bp_loc_type new_type;
1336 if (mr->attrib.mode != MEM_RW)
1337 new_type = bp_loc_hardware_breakpoint;
1339 new_type = bp_loc_software_breakpoint;
1341 if (new_type != bpt->loc_type)
1343 static int said = 0;
1344 bpt->loc_type = new_type;
1347 fprintf_filtered (gdb_stdout, _("\
1348 Note: automatically using hardware breakpoints for read-only addresses.\n"));
1353 else if (bpt->loc_type == bp_loc_software_breakpoint
1354 && mr->attrib.mode != MEM_RW)
1355 warning (_("cannot set software breakpoint at readonly address %s"),
1356 paddress (bpt->gdbarch, bpt->address));
1360 /* First check to see if we have to handle an overlay. */
1361 if (overlay_debugging == ovly_off
1362 || bpt->section == NULL
1363 || !(section_is_overlay (bpt->section)))
1365 /* No overlay handling: just set the breakpoint. */
1367 if (bpt->loc_type == bp_loc_hardware_breakpoint)
1368 val = target_insert_hw_breakpoint (bpt->gdbarch,
1371 val = target_insert_breakpoint (bpt->gdbarch,
1376 /* This breakpoint is in an overlay section.
1377 Shall we set a breakpoint at the LMA? */
1378 if (!overlay_events_enabled)
1380 /* Yes -- overlay event support is not active,
1381 so we must try to set a breakpoint at the LMA.
1382 This will not work for a hardware breakpoint. */
1383 if (bpt->loc_type == bp_loc_hardware_breakpoint)
1384 warning (_("hardware breakpoint %d not supported in overlay!"),
1385 bpt->owner->number);
1388 CORE_ADDR addr = overlay_unmapped_address (bpt->address,
1390 /* Set a software (trap) breakpoint at the LMA. */
1391 bpt->overlay_target_info = bpt->target_info;
1392 bpt->overlay_target_info.placed_address = addr;
1393 val = target_insert_breakpoint (bpt->gdbarch,
1394 &bpt->overlay_target_info);
1396 fprintf_unfiltered (tmp_error_stream,
1397 "Overlay breakpoint %d failed: in ROM?\n",
1398 bpt->owner->number);
1401 /* Shall we set a breakpoint at the VMA? */
1402 if (section_is_mapped (bpt->section))
1404 /* Yes. This overlay section is mapped into memory. */
1405 if (bpt->loc_type == bp_loc_hardware_breakpoint)
1406 val = target_insert_hw_breakpoint (bpt->gdbarch,
1409 val = target_insert_breakpoint (bpt->gdbarch,
1414 /* No. This breakpoint will not be inserted.
1415 No error, but do not mark the bp as 'inserted'. */
1422 /* Can't set the breakpoint. */
1423 if (solib_name_from_address (bpt->pspace, bpt->address))
1425 /* See also: disable_breakpoints_in_shlibs. */
1427 bpt->shlib_disabled = 1;
1428 if (!*disabled_breaks)
1430 fprintf_unfiltered (tmp_error_stream,
1431 "Cannot insert breakpoint %d.\n",
1432 bpt->owner->number);
1433 fprintf_unfiltered (tmp_error_stream,
1434 "Temporarily disabling shared library breakpoints:\n");
1436 *disabled_breaks = 1;
1437 fprintf_unfiltered (tmp_error_stream,
1438 "breakpoint #%d\n", bpt->owner->number);
1442 if (bpt->loc_type == bp_loc_hardware_breakpoint)
1444 *hw_breakpoint_error = 1;
1445 fprintf_unfiltered (tmp_error_stream,
1446 "Cannot insert hardware breakpoint %d.\n",
1447 bpt->owner->number);
1451 fprintf_unfiltered (tmp_error_stream,
1452 "Cannot insert breakpoint %d.\n",
1453 bpt->owner->number);
1454 fprintf_filtered (tmp_error_stream,
1455 "Error accessing memory address ");
1456 fputs_filtered (paddress (bpt->gdbarch, bpt->address),
1458 fprintf_filtered (tmp_error_stream, ": %s.\n",
1459 safe_strerror (val));
1470 else if (bpt->loc_type == bp_loc_hardware_watchpoint
1471 /* NOTE drow/2003-09-08: This state only exists for removing
1472 watchpoints. It's not clear that it's necessary... */
1473 && bpt->owner->disposition != disp_del_at_next_stop)
1475 val = target_insert_watchpoint (bpt->address,
1477 bpt->watchpoint_type);
1478 bpt->inserted = (val != -1);
1481 else if (bpt->owner->type == bp_catchpoint)
1483 struct gdb_exception e = catch_exception (uiout, insert_catchpoint,
1484 bpt->owner, RETURN_MASK_ERROR);
1485 exception_fprintf (gdb_stderr, e, "warning: inserting catchpoint %d: ",
1486 bpt->owner->number);
1488 bpt->owner->enable_state = bp_disabled;
1492 /* We've already printed an error message if there was a problem
1493 inserting this catchpoint, and we've disabled the catchpoint,
1494 so just return success. */
1501 /* This function is called when program space PSPACE is about to be
1502 deleted. It takes care of updating breakpoints to not reference
1506 breakpoint_program_space_exit (struct program_space *pspace)
1508 struct breakpoint *b, *b_temp;
1509 struct bp_location *loc, **loc_temp;
1511 /* Remove any breakpoint that was set through this program space. */
1512 ALL_BREAKPOINTS_SAFE (b, b_temp)
1514 if (b->pspace == pspace)
1515 delete_breakpoint (b);
1518 /* Breakpoints set through other program spaces could have locations
1519 bound to PSPACE as well. Remove those. */
1520 ALL_BP_LOCATIONS (loc, loc_temp)
1522 struct bp_location *tmp;
1524 if (loc->pspace == pspace)
1526 if (loc->owner->loc == loc)
1527 loc->owner->loc = loc->next;
1529 for (tmp = loc->owner->loc; tmp->next != NULL; tmp = tmp->next)
1530 if (tmp->next == loc)
1532 tmp->next = loc->next;
1538 /* Now update the global location list to permanently delete the
1539 removed locations above. */
1540 update_global_location_list (0);
1543 /* Make sure all breakpoints are inserted in inferior.
1544 Throws exception on any error.
1545 A breakpoint that is already inserted won't be inserted
1546 again, so calling this function twice is safe. */
1548 insert_breakpoints (void)
1550 struct breakpoint *bpt;
1552 ALL_BREAKPOINTS (bpt)
1553 if (is_hardware_watchpoint (bpt))
1554 update_watchpoint (bpt, 0 /* don't reparse. */);
1556 update_global_location_list (1);
1558 /* update_global_location_list does not insert breakpoints when
1559 always_inserted_mode is not enabled. Explicitly insert them
1561 if (!breakpoints_always_inserted_mode ())
1562 insert_breakpoint_locations ();
1565 /* insert_breakpoints is used when starting or continuing the program.
1566 remove_breakpoints is used when the program stops.
1567 Both return zero if successful,
1568 or an `errno' value if could not write the inferior. */
1571 insert_breakpoint_locations (void)
1573 struct breakpoint *bpt;
1574 struct bp_location *b, **bp_tmp;
1577 int disabled_breaks = 0;
1578 int hw_breakpoint_error = 0;
1580 struct ui_file *tmp_error_stream = mem_fileopen ();
1581 struct cleanup *cleanups = make_cleanup_ui_file_delete (tmp_error_stream);
1583 /* Explicitly mark the warning -- this will only be printed if
1584 there was an error. */
1585 fprintf_unfiltered (tmp_error_stream, "Warning:\n");
1587 save_current_space_and_thread ();
1589 ALL_BP_LOCATIONS (b, bp_tmp)
1591 struct thread_info *tp;
1592 CORE_ADDR last_addr;
1594 if (!should_be_inserted (b) || b->inserted)
1597 /* There is no point inserting thread-specific breakpoints if the
1598 thread no longer exists. */
1599 if (b->owner->thread != -1
1600 && !valid_thread_id (b->owner->thread))
1603 switch_to_program_space_and_thread (b->pspace);
1605 /* For targets that support global breakpoints, there's no need
1606 to select an inferior to insert breakpoint to. In fact, even
1607 if we aren't attached to any process yet, we should still
1608 insert breakpoints. */
1609 if (!gdbarch_has_global_breakpoints (target_gdbarch)
1610 && ptid_equal (inferior_ptid, null_ptid))
1613 val = insert_bp_location (b, tmp_error_stream,
1615 &hw_breakpoint_error);
1620 /* If we failed to insert all locations of a watchpoint,
1621 remove them, as half-inserted watchpoint is of limited use. */
1622 ALL_BREAKPOINTS (bpt)
1624 int some_failed = 0;
1625 struct bp_location *loc;
1627 if (!is_hardware_watchpoint (bpt))
1630 if (!breakpoint_enabled (bpt))
1633 if (bpt->disposition == disp_del_at_next_stop)
1636 for (loc = bpt->loc; loc; loc = loc->next)
1637 if (!loc->inserted && should_be_inserted (loc))
1644 for (loc = bpt->loc; loc; loc = loc->next)
1646 remove_breakpoint (loc, mark_uninserted);
1648 hw_breakpoint_error = 1;
1649 fprintf_unfiltered (tmp_error_stream,
1650 "Could not insert hardware watchpoint %d.\n",
1658 /* If a hardware breakpoint or watchpoint was inserted, add a
1659 message about possibly exhausted resources. */
1660 if (hw_breakpoint_error)
1662 fprintf_unfiltered (tmp_error_stream,
1663 "Could not insert hardware breakpoints:\n\
1664 You may have requested too many hardware breakpoints/watchpoints.\n");
1666 target_terminal_ours_for_output ();
1667 error_stream (tmp_error_stream);
1670 do_cleanups (cleanups);
1674 remove_breakpoints (void)
1676 struct bp_location *b, **bp_tmp;
1679 ALL_BP_LOCATIONS (b, bp_tmp)
1682 val |= remove_breakpoint (b, mark_uninserted);
1687 /* Remove breakpoints of process PID. */
1690 remove_breakpoints_pid (int pid)
1692 struct bp_location *b, **b_tmp;
1694 struct inferior *inf = find_inferior_pid (pid);
1696 ALL_BP_LOCATIONS (b, b_tmp)
1698 if (b->pspace != inf->pspace)
1703 val = remove_breakpoint (b, mark_uninserted);
1712 remove_hw_watchpoints (void)
1714 struct bp_location *b, **bp_tmp;
1717 ALL_BP_LOCATIONS (b, bp_tmp)
1719 if (b->inserted && b->loc_type == bp_loc_hardware_watchpoint)
1720 val |= remove_breakpoint (b, mark_uninserted);
1726 reattach_breakpoints (int pid)
1728 struct cleanup *old_chain;
1729 struct bp_location *b, **bp_tmp;
1731 struct ui_file *tmp_error_stream = mem_fileopen ();
1732 int dummy1 = 0, dummy2 = 0;
1733 struct inferior *inf;
1734 struct thread_info *tp;
1736 tp = any_live_thread_of_process (pid);
1740 inf = find_inferior_pid (pid);
1741 old_chain = save_inferior_ptid ();
1743 inferior_ptid = tp->ptid;
1745 make_cleanup_ui_file_delete (tmp_error_stream);
1747 ALL_BP_LOCATIONS (b, bp_tmp)
1749 if (b->pspace != inf->pspace)
1755 val = insert_bp_location (b, tmp_error_stream,
1759 do_cleanups (old_chain);
1764 do_cleanups (old_chain);
1768 static int internal_breakpoint_number = -1;
1770 static struct breakpoint *
1771 create_internal_breakpoint (struct gdbarch *gdbarch,
1772 CORE_ADDR address, enum bptype type)
1774 struct symtab_and_line sal;
1775 struct breakpoint *b;
1777 init_sal (&sal); /* initialize to zeroes */
1780 sal.section = find_pc_overlay (sal.pc);
1781 sal.pspace = current_program_space;
1783 b = set_raw_breakpoint (gdbarch, sal, type);
1784 b->number = internal_breakpoint_number--;
1785 b->disposition = disp_donttouch;
1791 create_overlay_event_breakpoint (char *func_name)
1793 struct objfile *objfile;
1795 ALL_OBJFILES (objfile)
1797 struct breakpoint *b;
1798 struct minimal_symbol *m;
1800 m = lookup_minimal_symbol_text (func_name, objfile);
1804 b = create_internal_breakpoint (get_objfile_arch (objfile),
1805 SYMBOL_VALUE_ADDRESS (m),
1807 b->addr_string = xstrdup (func_name);
1809 if (overlay_debugging == ovly_auto)
1811 b->enable_state = bp_enabled;
1812 overlay_events_enabled = 1;
1816 b->enable_state = bp_disabled;
1817 overlay_events_enabled = 0;
1820 update_global_location_list (1);
1824 create_longjmp_master_breakpoint (char *func_name)
1826 struct program_space *pspace;
1827 struct objfile *objfile;
1828 struct cleanup *old_chain;
1830 old_chain = save_current_program_space ();
1832 ALL_PSPACES (pspace)
1833 ALL_OBJFILES (objfile)
1835 struct breakpoint *b;
1836 struct minimal_symbol *m;
1838 if (!gdbarch_get_longjmp_target_p (get_objfile_arch (objfile)))
1841 set_current_program_space (pspace);
1843 m = lookup_minimal_symbol_text (func_name, objfile);
1847 b = create_internal_breakpoint (get_objfile_arch (objfile),
1848 SYMBOL_VALUE_ADDRESS (m),
1850 b->addr_string = xstrdup (func_name);
1851 b->enable_state = bp_disabled;
1853 update_global_location_list (1);
1855 do_cleanups (old_chain);
1859 update_breakpoints_after_exec (void)
1861 struct breakpoint *b;
1862 struct breakpoint *temp;
1863 struct bp_location *bploc, **bplocp_tmp;
1865 /* We're about to delete breakpoints from GDB's lists. If the
1866 INSERTED flag is true, GDB will try to lift the breakpoints by
1867 writing the breakpoints' "shadow contents" back into memory. The
1868 "shadow contents" are NOT valid after an exec, so GDB should not
1869 do that. Instead, the target is responsible from marking
1870 breakpoints out as soon as it detects an exec. We don't do that
1871 here instead, because there may be other attempts to delete
1872 breakpoints after detecting an exec and before reaching here. */
1873 ALL_BP_LOCATIONS (bploc, bplocp_tmp)
1874 if (bploc->pspace == current_program_space)
1875 gdb_assert (!bploc->inserted);
1877 ALL_BREAKPOINTS_SAFE (b, temp)
1879 if (b->pspace != current_program_space)
1882 /* Solib breakpoints must be explicitly reset after an exec(). */
1883 if (b->type == bp_shlib_event)
1885 delete_breakpoint (b);
1889 /* JIT breakpoints must be explicitly reset after an exec(). */
1890 if (b->type == bp_jit_event)
1892 delete_breakpoint (b);
1896 /* Thread event breakpoints must be set anew after an exec(),
1897 as must overlay event and longjmp master breakpoints. */
1898 if (b->type == bp_thread_event || b->type == bp_overlay_event
1899 || b->type == bp_longjmp_master)
1901 delete_breakpoint (b);
1905 /* Step-resume breakpoints are meaningless after an exec(). */
1906 if (b->type == bp_step_resume)
1908 delete_breakpoint (b);
1912 /* Longjmp and longjmp-resume breakpoints are also meaningless
1914 if (b->type == bp_longjmp || b->type == bp_longjmp_resume)
1916 delete_breakpoint (b);
1920 if (b->type == bp_catchpoint)
1922 /* For now, none of the bp_catchpoint breakpoints need to
1923 do anything at this point. In the future, if some of
1924 the catchpoints need to something, we will need to add
1925 a new method, and call this method from here. */
1929 /* bp_finish is a special case. The only way we ought to be able
1930 to see one of these when an exec() has happened, is if the user
1931 caught a vfork, and then said "finish". Ordinarily a finish just
1932 carries them to the call-site of the current callee, by setting
1933 a temporary bp there and resuming. But in this case, the finish
1934 will carry them entirely through the vfork & exec.
1936 We don't want to allow a bp_finish to remain inserted now. But
1937 we can't safely delete it, 'cause finish_command has a handle to
1938 the bp on a bpstat, and will later want to delete it. There's a
1939 chance (and I've seen it happen) that if we delete the bp_finish
1940 here, that its storage will get reused by the time finish_command
1941 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1942 We really must allow finish_command to delete a bp_finish.
1944 In the absense of a general solution for the "how do we know
1945 it's safe to delete something others may have handles to?"
1946 problem, what we'll do here is just uninsert the bp_finish, and
1947 let finish_command delete it.
1949 (We know the bp_finish is "doomed" in the sense that it's
1950 momentary, and will be deleted as soon as finish_command sees
1951 the inferior stopped. So it doesn't matter that the bp's
1952 address is probably bogus in the new a.out, unlike e.g., the
1953 solib breakpoints.) */
1955 if (b->type == bp_finish)
1960 /* Without a symbolic address, we have little hope of the
1961 pre-exec() address meaning the same thing in the post-exec()
1963 if (b->addr_string == NULL)
1965 delete_breakpoint (b);
1969 /* FIXME what about longjmp breakpoints? Re-create them here? */
1970 create_overlay_event_breakpoint ("_ovly_debug_event");
1971 create_longjmp_master_breakpoint ("longjmp");
1972 create_longjmp_master_breakpoint ("_longjmp");
1973 create_longjmp_master_breakpoint ("siglongjmp");
1974 create_longjmp_master_breakpoint ("_siglongjmp");
1978 detach_breakpoints (int pid)
1980 struct bp_location *b, **bp_tmp;
1982 struct cleanup *old_chain = save_inferior_ptid ();
1983 struct inferior *inf = current_inferior ();
1985 if (pid == PIDGET (inferior_ptid))
1986 error (_("Cannot detach breakpoints of inferior_ptid"));
1988 /* Set inferior_ptid; remove_breakpoint_1 uses this global. */
1989 inferior_ptid = pid_to_ptid (pid);
1990 ALL_BP_LOCATIONS (b, bp_tmp)
1992 if (b->pspace != inf->pspace)
1996 val |= remove_breakpoint_1 (b, mark_inserted);
1998 do_cleanups (old_chain);
2002 /* Remove the breakpoint location B from the current address space.
2003 Note that this is used to detach breakpoints from a child fork.
2004 When we get here, the child isn't in the inferior list, and neither
2005 do we have objects to represent its address space --- we should
2006 *not* look at b->pspace->aspace here. */
2009 remove_breakpoint_1 (struct bp_location *b, insertion_state_t is)
2012 struct cleanup *old_chain;
2014 if (b->owner->enable_state == bp_permanent)
2015 /* Permanent breakpoints cannot be inserted or removed. */
2018 /* The type of none suggests that owner is actually deleted.
2019 This should not ever happen. */
2020 gdb_assert (b->owner->type != bp_none);
2022 if (b->loc_type == bp_loc_software_breakpoint
2023 || b->loc_type == bp_loc_hardware_breakpoint)
2025 /* "Normal" instruction breakpoint: either the standard
2026 trap-instruction bp (bp_breakpoint), or a
2027 bp_hardware_breakpoint. */
2029 /* First check to see if we have to handle an overlay. */
2030 if (overlay_debugging == ovly_off
2031 || b->section == NULL
2032 || !(section_is_overlay (b->section)))
2034 /* No overlay handling: just remove the breakpoint. */
2036 if (b->loc_type == bp_loc_hardware_breakpoint)
2037 val = target_remove_hw_breakpoint (b->gdbarch, &b->target_info);
2039 val = target_remove_breakpoint (b->gdbarch, &b->target_info);
2043 /* This breakpoint is in an overlay section.
2044 Did we set a breakpoint at the LMA? */
2045 if (!overlay_events_enabled)
2047 /* Yes -- overlay event support is not active, so we
2048 should have set a breakpoint at the LMA. Remove it.
2050 /* Ignore any failures: if the LMA is in ROM, we will
2051 have already warned when we failed to insert it. */
2052 if (b->loc_type == bp_loc_hardware_breakpoint)
2053 target_remove_hw_breakpoint (b->gdbarch,
2054 &b->overlay_target_info);
2056 target_remove_breakpoint (b->gdbarch,
2057 &b->overlay_target_info);
2059 /* Did we set a breakpoint at the VMA?
2060 If so, we will have marked the breakpoint 'inserted'. */
2063 /* Yes -- remove it. Previously we did not bother to
2064 remove the breakpoint if the section had been
2065 unmapped, but let's not rely on that being safe. We
2066 don't know what the overlay manager might do. */
2067 if (b->loc_type == bp_loc_hardware_breakpoint)
2068 val = target_remove_hw_breakpoint (b->gdbarch,
2071 /* However, we should remove *software* breakpoints only
2072 if the section is still mapped, or else we overwrite
2073 wrong code with the saved shadow contents. */
2074 else if (section_is_mapped (b->section))
2075 val = target_remove_breakpoint (b->gdbarch,
2082 /* No -- not inserted, so no need to remove. No error. */
2087 /* In some cases, we might not be able to remove a breakpoint
2088 in a shared library that has already been removed, but we
2089 have not yet processed the shlib unload event. */
2090 if (val && solib_name_from_address (b->pspace, b->address))
2095 b->inserted = (is == mark_inserted);
2097 else if (b->loc_type == bp_loc_hardware_watchpoint)
2102 b->inserted = (is == mark_inserted);
2103 val = target_remove_watchpoint (b->address, b->length,
2104 b->watchpoint_type);
2106 /* Failure to remove any of the hardware watchpoints comes here. */
2107 if ((is == mark_uninserted) && (b->inserted))
2108 warning (_("Could not remove hardware watchpoint %d."),
2111 else if (b->owner->type == bp_catchpoint
2112 && breakpoint_enabled (b->owner)
2115 gdb_assert (b->owner->ops != NULL && b->owner->ops->remove != NULL);
2117 val = b->owner->ops->remove (b->owner);
2120 b->inserted = (is == mark_inserted);
2127 remove_breakpoint (struct bp_location *b, insertion_state_t is)
2130 struct cleanup *old_chain;
2132 if (b->owner->enable_state == bp_permanent)
2133 /* Permanent breakpoints cannot be inserted or removed. */
2136 /* The type of none suggests that owner is actually deleted.
2137 This should not ever happen. */
2138 gdb_assert (b->owner->type != bp_none);
2140 old_chain = save_current_space_and_thread ();
2142 switch_to_program_space_and_thread (b->pspace);
2144 ret = remove_breakpoint_1 (b, is);
2146 do_cleanups (old_chain);
2150 /* Clear the "inserted" flag in all breakpoints. */
2153 mark_breakpoints_out (void)
2155 struct bp_location *bpt, **bptp_tmp;
2157 ALL_BP_LOCATIONS (bpt, bptp_tmp)
2158 if (bpt->pspace == current_program_space)
2162 /* Clear the "inserted" flag in all breakpoints and delete any
2163 breakpoints which should go away between runs of the program.
2165 Plus other such housekeeping that has to be done for breakpoints
2168 Note: this function gets called at the end of a run (by
2169 generic_mourn_inferior) and when a run begins (by
2170 init_wait_for_inferior). */
2175 breakpoint_init_inferior (enum inf_context context)
2177 struct breakpoint *b, *temp;
2178 struct bp_location *bpt, **bptp_tmp;
2180 struct program_space *pspace = current_program_space;
2182 /* If breakpoint locations are shared across processes, then there's
2184 if (gdbarch_has_global_breakpoints (target_gdbarch))
2187 ALL_BP_LOCATIONS (bpt, bptp_tmp)
2189 if (bpt->pspace == pspace
2190 && bpt->owner->enable_state != bp_permanent)
2194 ALL_BREAKPOINTS_SAFE (b, temp)
2196 if (b->loc && b->loc->pspace != pspace)
2202 case bp_watchpoint_scope:
2204 /* If the call dummy breakpoint is at the entry point it will
2205 cause problems when the inferior is rerun, so we better
2208 Also get rid of scope breakpoints. */
2209 delete_breakpoint (b);
2213 case bp_hardware_watchpoint:
2214 case bp_read_watchpoint:
2215 case bp_access_watchpoint:
2217 /* Likewise for watchpoints on local expressions. */
2218 if (b->exp_valid_block != NULL)
2219 delete_breakpoint (b);
2220 else if (context == inf_starting)
2222 /* Reset val field to force reread of starting value
2223 in insert_breakpoints. */
2225 value_free (b->val);
2235 /* Get rid of the moribund locations. */
2236 for (ix = 0; VEC_iterate (bp_location_p, moribund_locations, ix, bpt); ++ix)
2237 free_bp_location (bpt);
2238 VEC_free (bp_location_p, moribund_locations);
2241 /* These functions concern about actual breakpoints inserted in the
2242 target --- to e.g. check if we need to do decr_pc adjustment or if
2243 we need to hop over the bkpt --- so we check for address space
2244 match, not program space. */
2246 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
2247 exists at PC. It returns ordinary_breakpoint_here if it's an
2248 ordinary breakpoint, or permanent_breakpoint_here if it's a
2249 permanent breakpoint.
2250 - When continuing from a location with an ordinary breakpoint, we
2251 actually single step once before calling insert_breakpoints.
2252 - When continuing from a localion with a permanent breakpoint, we
2253 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
2254 the target, to advance the PC past the breakpoint. */
2256 enum breakpoint_here
2257 breakpoint_here_p (struct address_space *aspace, CORE_ADDR pc)
2259 struct bp_location *bpt, **bptp_tmp;
2260 int any_breakpoint_here = 0;
2262 ALL_BP_LOCATIONS (bpt, bptp_tmp)
2264 if (bpt->loc_type != bp_loc_software_breakpoint
2265 && bpt->loc_type != bp_loc_hardware_breakpoint)
2268 if ((breakpoint_enabled (bpt->owner)
2269 || bpt->owner->enable_state == bp_permanent)
2270 && breakpoint_address_match (bpt->pspace->aspace, bpt->address,
2273 if (overlay_debugging
2274 && section_is_overlay (bpt->section)
2275 && !section_is_mapped (bpt->section))
2276 continue; /* unmapped overlay -- can't be a match */
2277 else if (bpt->owner->enable_state == bp_permanent)
2278 return permanent_breakpoint_here;
2280 any_breakpoint_here = 1;
2284 return any_breakpoint_here ? ordinary_breakpoint_here : 0;
2287 /* Return true if there's a moribund breakpoint at PC. */
2290 moribund_breakpoint_here_p (struct address_space *aspace, CORE_ADDR pc)
2292 struct bp_location *loc;
2295 for (ix = 0; VEC_iterate (bp_location_p, moribund_locations, ix, loc); ++ix)
2296 if (breakpoint_address_match (loc->pspace->aspace, loc->address,
2303 /* Returns non-zero if there's a breakpoint inserted at PC, which is
2304 inserted using regular breakpoint_chain / bp_location array mechanism.
2305 This does not check for single-step breakpoints, which are
2306 inserted and removed using direct target manipulation. */
2309 regular_breakpoint_inserted_here_p (struct address_space *aspace, CORE_ADDR pc)
2311 struct bp_location *bpt, **bptp_tmp;
2313 ALL_BP_LOCATIONS (bpt, bptp_tmp)
2315 if (bpt->loc_type != bp_loc_software_breakpoint
2316 && bpt->loc_type != bp_loc_hardware_breakpoint)
2320 && breakpoint_address_match (bpt->pspace->aspace, bpt->address,
2323 if (overlay_debugging
2324 && section_is_overlay (bpt->section)
2325 && !section_is_mapped (bpt->section))
2326 continue; /* unmapped overlay -- can't be a match */
2334 /* Returns non-zero iff there's either regular breakpoint
2335 or a single step breakpoint inserted at PC. */
2338 breakpoint_inserted_here_p (struct address_space *aspace, CORE_ADDR pc)
2340 if (regular_breakpoint_inserted_here_p (aspace, pc))
2343 if (single_step_breakpoint_inserted_here_p (aspace, pc))
2349 /* This function returns non-zero iff there is a software breakpoint
2353 software_breakpoint_inserted_here_p (struct address_space *aspace, CORE_ADDR pc)
2355 struct bp_location *bpt, **bptp_tmp;
2356 int any_breakpoint_here = 0;
2358 ALL_BP_LOCATIONS (bpt, bptp_tmp)
2360 if (bpt->loc_type != bp_loc_software_breakpoint)
2364 && breakpoint_address_match (bpt->pspace->aspace, bpt->address,
2367 if (overlay_debugging
2368 && section_is_overlay (bpt->section)
2369 && !section_is_mapped (bpt->section))
2370 continue; /* unmapped overlay -- can't be a match */
2376 /* Also check for software single-step breakpoints. */
2377 if (single_step_breakpoint_inserted_here_p (aspace, pc))
2384 hardware_watchpoint_inserted_in_range (struct address_space *aspace,
2385 CORE_ADDR addr, ULONGEST len)
2387 struct breakpoint *bpt;
2389 ALL_BREAKPOINTS (bpt)
2391 struct bp_location *loc;
2393 if (bpt->type != bp_hardware_watchpoint
2394 && bpt->type != bp_access_watchpoint)
2397 if (!breakpoint_enabled (bpt))
2400 for (loc = bpt->loc; loc; loc = loc->next)
2401 if (loc->pspace->aspace == aspace && loc->inserted)
2405 /* Check for intersection. */
2406 l = max (loc->address, addr);
2407 h = min (loc->address + loc->length, addr + len);
2415 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
2416 PC is valid for process/thread PTID. */
2419 breakpoint_thread_match (struct address_space *aspace, CORE_ADDR pc,
2422 struct bp_location *bpt, **bptp_tmp;
2423 /* The thread and task IDs associated to PTID, computed lazily. */
2427 ALL_BP_LOCATIONS (bpt, bptp_tmp)
2429 if (bpt->loc_type != bp_loc_software_breakpoint
2430 && bpt->loc_type != bp_loc_hardware_breakpoint)
2433 if (!breakpoint_enabled (bpt->owner)
2434 && bpt->owner->enable_state != bp_permanent)
2437 if (!breakpoint_address_match (bpt->pspace->aspace, bpt->address,
2441 if (bpt->owner->thread != -1)
2443 /* This is a thread-specific breakpoint. Check that ptid
2444 matches that thread. If thread hasn't been computed yet,
2445 it is now time to do so. */
2447 thread = pid_to_thread_id (ptid);
2448 if (bpt->owner->thread != thread)
2452 if (bpt->owner->task != 0)
2454 /* This is a task-specific breakpoint. Check that ptid
2455 matches that task. If task hasn't been computed yet,
2456 it is now time to do so. */
2458 task = ada_get_task_number (ptid);
2459 if (bpt->owner->task != task)
2463 if (overlay_debugging
2464 && section_is_overlay (bpt->section)
2465 && !section_is_mapped (bpt->section))
2466 continue; /* unmapped overlay -- can't be a match */
2475 /* bpstat stuff. External routines' interfaces are documented
2479 ep_is_catchpoint (struct breakpoint *ep)
2481 return (ep->type == bp_catchpoint);
2485 bpstat_free (bpstat bs)
2487 if (bs->old_val != NULL)
2488 value_free (bs->old_val);
2489 free_command_lines (&bs->commands);
2493 /* Clear a bpstat so that it says we are not at any breakpoint.
2494 Also free any storage that is part of a bpstat. */
2497 bpstat_clear (bpstat *bsp)
2514 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
2515 is part of the bpstat is copied as well. */
2518 bpstat_copy (bpstat bs)
2522 bpstat retval = NULL;
2527 for (; bs != NULL; bs = bs->next)
2529 tmp = (bpstat) xmalloc (sizeof (*tmp));
2530 memcpy (tmp, bs, sizeof (*tmp));
2531 if (bs->commands != NULL)
2532 tmp->commands = copy_command_lines (bs->commands);
2533 if (bs->old_val != NULL)
2535 tmp->old_val = value_copy (bs->old_val);
2536 release_value (tmp->old_val);
2540 /* This is the first thing in the chain. */
2550 /* Find the bpstat associated with this breakpoint */
2553 bpstat_find_breakpoint (bpstat bsp, struct breakpoint *breakpoint)
2558 for (; bsp != NULL; bsp = bsp->next)
2560 if (bsp->breakpoint_at && bsp->breakpoint_at->owner == breakpoint)
2566 /* Find a step_resume breakpoint associated with this bpstat.
2567 (If there are multiple step_resume bp's on the list, this function
2568 will arbitrarily pick one.)
2570 It is an error to use this function if BPSTAT doesn't contain a
2571 step_resume breakpoint.
2573 See wait_for_inferior's use of this function. */
2575 bpstat_find_step_resume_breakpoint (bpstat bsp)
2579 gdb_assert (bsp != NULL);
2581 current_thread = pid_to_thread_id (inferior_ptid);
2583 for (; bsp != NULL; bsp = bsp->next)
2585 if ((bsp->breakpoint_at != NULL)
2586 && (bsp->breakpoint_at->owner->type == bp_step_resume)
2587 && (bsp->breakpoint_at->owner->thread == current_thread
2588 || bsp->breakpoint_at->owner->thread == -1))
2589 return bsp->breakpoint_at->owner;
2592 internal_error (__FILE__, __LINE__, _("No step_resume breakpoint found."));
2596 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
2597 at. *BSP upon return is a bpstat which points to the remaining
2598 breakpoints stopped at (but which is not guaranteed to be good for
2599 anything but further calls to bpstat_num).
2600 Return 0 if passed a bpstat which does not indicate any breakpoints.
2601 Return -1 if stopped at a breakpoint that has been deleted since
2603 Return 1 otherwise. */
2606 bpstat_num (bpstat *bsp, int *num)
2608 struct breakpoint *b;
2611 return 0; /* No more breakpoint values */
2613 /* We assume we'll never have several bpstats that
2614 correspond to a single breakpoint -- otherwise,
2615 this function might return the same number more
2616 than once and this will look ugly. */
2617 b = (*bsp)->breakpoint_at ? (*bsp)->breakpoint_at->owner : NULL;
2618 *bsp = (*bsp)->next;
2620 return -1; /* breakpoint that's been deleted since */
2622 *num = b->number; /* We have its number */
2626 /* Modify BS so that the actions will not be performed. */
2629 bpstat_clear_actions (bpstat bs)
2631 for (; bs != NULL; bs = bs->next)
2633 free_command_lines (&bs->commands);
2634 if (bs->old_val != NULL)
2636 value_free (bs->old_val);
2642 /* Called when a command is about to proceed the inferior. */
2645 breakpoint_about_to_proceed (void)
2647 if (!ptid_equal (inferior_ptid, null_ptid))
2649 struct thread_info *tp = inferior_thread ();
2651 /* Allow inferior function calls in breakpoint commands to not
2652 interrupt the command list. When the call finishes
2653 successfully, the inferior will be standing at the same
2654 breakpoint as if nothing happened. */
2659 breakpoint_proceeded = 1;
2662 /* Stub for cleaning up our state if we error-out of a breakpoint command */
2664 cleanup_executing_breakpoints (void *ignore)
2666 executing_breakpoint_commands = 0;
2669 /* Execute all the commands associated with all the breakpoints at this
2670 location. Any of these commands could cause the process to proceed
2671 beyond this point, etc. We look out for such changes by checking
2672 the global "breakpoint_proceeded" after each command.
2674 Returns true if a breakpoint command resumed the inferior. In that
2675 case, it is the caller's responsibility to recall it again with the
2676 bpstat of the current thread. */
2679 bpstat_do_actions_1 (bpstat *bsp)
2682 struct cleanup *old_chain;
2685 /* Avoid endless recursion if a `source' command is contained
2687 if (executing_breakpoint_commands)
2690 executing_breakpoint_commands = 1;
2691 old_chain = make_cleanup (cleanup_executing_breakpoints, 0);
2693 /* This pointer will iterate over the list of bpstat's. */
2696 breakpoint_proceeded = 0;
2697 for (; bs != NULL; bs = bs->next)
2699 struct command_line *cmd;
2700 struct cleanup *this_cmd_tree_chain;
2702 /* Take ownership of the BSP's command tree, if it has one.
2704 The command tree could legitimately contain commands like
2705 'step' and 'next', which call clear_proceed_status, which
2706 frees stop_bpstat's command tree. To make sure this doesn't
2707 free the tree we're executing out from under us, we need to
2708 take ownership of the tree ourselves. Since a given bpstat's
2709 commands are only executed once, we don't need to copy it; we
2710 can clear the pointer in the bpstat, and make sure we free
2711 the tree when we're done. */
2714 this_cmd_tree_chain = make_cleanup_free_command_lines (&cmd);
2718 execute_control_command (cmd);
2720 if (breakpoint_proceeded)
2726 /* We can free this command tree now. */
2727 do_cleanups (this_cmd_tree_chain);
2729 if (breakpoint_proceeded)
2731 if (target_can_async_p ())
2732 /* If we are in async mode, then the target might be still
2733 running, not stopped at any breakpoint, so nothing for
2734 us to do here -- just return to the event loop. */
2737 /* In sync mode, when execute_control_command returns
2738 we're already standing on the next breakpoint.
2739 Breakpoint commands for that stop were not run, since
2740 execute_command does not run breakpoint commands --
2741 only command_line_handler does, but that one is not
2742 involved in execution of breakpoint commands. So, we
2743 can now execute breakpoint commands. It should be
2744 noted that making execute_command do bpstat actions is
2745 not an option -- in this case we'll have recursive
2746 invocation of bpstat for each breakpoint with a
2747 command, and can easily blow up GDB stack. Instead, we
2748 return true, which will trigger the caller to recall us
2749 with the new stop_bpstat. */
2754 do_cleanups (old_chain);
2759 bpstat_do_actions (void)
2761 /* Do any commands attached to breakpoint we are stopped at. */
2762 while (!ptid_equal (inferior_ptid, null_ptid)
2763 && target_has_execution
2764 && !is_exited (inferior_ptid)
2765 && !is_executing (inferior_ptid))
2766 /* Since in sync mode, bpstat_do_actions may resume the inferior,
2767 and only return when it is stopped at the next breakpoint, we
2768 keep doing breakpoint actions until it returns false to
2769 indicate the inferior was not resumed. */
2770 if (!bpstat_do_actions_1 (&inferior_thread ()->stop_bpstat))
2774 /* Print out the (old or new) value associated with a watchpoint. */
2777 watchpoint_value_print (struct value *val, struct ui_file *stream)
2780 fprintf_unfiltered (stream, _("<unreadable>"));
2783 struct value_print_options opts;
2784 get_user_print_options (&opts);
2785 value_print (val, stream, &opts);
2789 /* This is the normal print function for a bpstat. In the future,
2790 much of this logic could (should?) be moved to bpstat_stop_status,
2791 by having it set different print_it values.
2793 Current scheme: When we stop, bpstat_print() is called. It loops
2794 through the bpstat list of things causing this stop, calling the
2795 print_bp_stop_message function on each one. The behavior of the
2796 print_bp_stop_message function depends on the print_it field of
2797 bpstat. If such field so indicates, call this function here.
2799 Return values from this routine (ultimately used by bpstat_print()
2800 and normal_stop() to decide what to do):
2801 PRINT_NOTHING: Means we already printed all we needed to print,
2802 don't print anything else.
2803 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2804 that something to be followed by a location.
2805 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2806 that something to be followed by a location.
2807 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2810 static enum print_stop_action
2811 print_it_typical (bpstat bs)
2813 struct cleanup *old_chain;
2814 struct breakpoint *b;
2815 const struct bp_location *bl;
2816 struct ui_stream *stb;
2818 enum print_stop_action result;
2820 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2821 which has since been deleted. */
2822 if (bs->breakpoint_at == NULL)
2823 return PRINT_UNKNOWN;
2824 bl = bs->breakpoint_at;
2827 stb = ui_out_stream_new (uiout);
2828 old_chain = make_cleanup_ui_out_stream_delete (stb);
2833 case bp_hardware_breakpoint:
2834 bp_temp = bs->breakpoint_at->owner->disposition == disp_del;
2835 if (bl->address != bl->requested_address)
2836 breakpoint_adjustment_warning (bl->requested_address,
2839 annotate_breakpoint (b->number);
2841 ui_out_text (uiout, "\nTemporary breakpoint ");
2843 ui_out_text (uiout, "\nBreakpoint ");
2844 if (ui_out_is_mi_like_p (uiout))
2846 ui_out_field_string (uiout, "reason",
2847 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT));
2848 ui_out_field_string (uiout, "disp", bpdisp_text (b->disposition));
2850 ui_out_field_int (uiout, "bkptno", b->number);
2851 ui_out_text (uiout, ", ");
2852 result = PRINT_SRC_AND_LOC;
2855 case bp_shlib_event:
2856 /* Did we stop because the user set the stop_on_solib_events
2857 variable? (If so, we report this as a generic, "Stopped due
2858 to shlib event" message.) */
2859 printf_filtered (_("Stopped due to shared library event\n"));
2860 result = PRINT_NOTHING;
2863 case bp_thread_event:
2864 /* Not sure how we will get here.
2865 GDB should not stop for these breakpoints. */
2866 printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n"));
2867 result = PRINT_NOTHING;
2870 case bp_overlay_event:
2871 /* By analogy with the thread event, GDB should not stop for these. */
2872 printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n"));
2873 result = PRINT_NOTHING;
2876 case bp_longjmp_master:
2877 /* These should never be enabled. */
2878 printf_filtered (_("Longjmp Master Breakpoint: gdb should not stop!\n"));
2879 result = PRINT_NOTHING;
2883 case bp_hardware_watchpoint:
2884 annotate_watchpoint (b->number);
2885 if (ui_out_is_mi_like_p (uiout))
2888 async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER));
2890 make_cleanup_ui_out_tuple_begin_end (uiout, "value");
2891 ui_out_text (uiout, "\nOld value = ");
2892 watchpoint_value_print (bs->old_val, stb->stream);
2893 ui_out_field_stream (uiout, "old", stb);
2894 ui_out_text (uiout, "\nNew value = ");
2895 watchpoint_value_print (b->val, stb->stream);
2896 ui_out_field_stream (uiout, "new", stb);
2897 ui_out_text (uiout, "\n");
2898 /* More than one watchpoint may have been triggered. */
2899 result = PRINT_UNKNOWN;
2902 case bp_read_watchpoint:
2903 if (ui_out_is_mi_like_p (uiout))
2906 async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER));
2908 make_cleanup_ui_out_tuple_begin_end (uiout, "value");
2909 ui_out_text (uiout, "\nValue = ");
2910 watchpoint_value_print (b->val, stb->stream);
2911 ui_out_field_stream (uiout, "value", stb);
2912 ui_out_text (uiout, "\n");
2913 result = PRINT_UNKNOWN;
2916 case bp_access_watchpoint:
2917 if (bs->old_val != NULL)
2919 annotate_watchpoint (b->number);
2920 if (ui_out_is_mi_like_p (uiout))
2923 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER));
2925 make_cleanup_ui_out_tuple_begin_end (uiout, "value");
2926 ui_out_text (uiout, "\nOld value = ");
2927 watchpoint_value_print (bs->old_val, stb->stream);
2928 ui_out_field_stream (uiout, "old", stb);
2929 ui_out_text (uiout, "\nNew value = ");
2934 if (ui_out_is_mi_like_p (uiout))
2937 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER));
2938 make_cleanup_ui_out_tuple_begin_end (uiout, "value");
2939 ui_out_text (uiout, "\nValue = ");
2941 watchpoint_value_print (b->val, stb->stream);
2942 ui_out_field_stream (uiout, "new", stb);
2943 ui_out_text (uiout, "\n");
2944 result = PRINT_UNKNOWN;
2947 /* Fall through, we don't deal with these types of breakpoints
2951 if (ui_out_is_mi_like_p (uiout))
2954 async_reason_lookup (EXEC_ASYNC_FUNCTION_FINISHED));
2955 result = PRINT_UNKNOWN;
2959 if (ui_out_is_mi_like_p (uiout))
2962 async_reason_lookup (EXEC_ASYNC_LOCATION_REACHED));
2963 result = PRINT_UNKNOWN;
2968 case bp_longjmp_resume:
2969 case bp_step_resume:
2970 case bp_watchpoint_scope:
2975 result = PRINT_UNKNOWN;
2979 do_cleanups (old_chain);
2983 /* Generic routine for printing messages indicating why we
2984 stopped. The behavior of this function depends on the value
2985 'print_it' in the bpstat structure. Under some circumstances we
2986 may decide not to print anything here and delegate the task to
2989 static enum print_stop_action
2990 print_bp_stop_message (bpstat bs)
2992 switch (bs->print_it)
2995 /* Nothing should be printed for this bpstat entry. */
2996 return PRINT_UNKNOWN;
3000 /* We still want to print the frame, but we already printed the
3001 relevant messages. */
3002 return PRINT_SRC_AND_LOC;
3005 case print_it_normal:
3007 const struct bp_location *bl = bs->breakpoint_at;
3008 struct breakpoint *b = bl ? bl->owner : NULL;
3010 /* Normal case. Call the breakpoint's print_it method, or
3011 print_it_typical. */
3012 /* FIXME: how breakpoint can ever be NULL here? */
3013 if (b != NULL && b->ops != NULL && b->ops->print_it != NULL)
3014 return b->ops->print_it (b);
3016 return print_it_typical (bs);
3021 internal_error (__FILE__, __LINE__,
3022 _("print_bp_stop_message: unrecognized enum value"));
3027 /* Print a message indicating what happened. This is called from
3028 normal_stop(). The input to this routine is the head of the bpstat
3029 list - a list of the eventpoints that caused this stop. This
3030 routine calls the generic print routine for printing a message
3031 about reasons for stopping. This will print (for example) the
3032 "Breakpoint n," part of the output. The return value of this
3035 PRINT_UNKNOWN: Means we printed nothing
3036 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
3037 code to print the location. An example is
3038 "Breakpoint 1, " which should be followed by
3040 PRINT_SRC_ONLY: Means we printed something, but there is no need
3041 to also print the location part of the message.
3042 An example is the catch/throw messages, which
3043 don't require a location appended to the end.
3044 PRINT_NOTHING: We have done some printing and we don't need any
3045 further info to be printed.*/
3047 enum print_stop_action
3048 bpstat_print (bpstat bs)
3052 /* Maybe another breakpoint in the chain caused us to stop.
3053 (Currently all watchpoints go on the bpstat whether hit or not.
3054 That probably could (should) be changed, provided care is taken
3055 with respect to bpstat_explains_signal). */
3056 for (; bs; bs = bs->next)
3058 val = print_bp_stop_message (bs);
3059 if (val == PRINT_SRC_ONLY
3060 || val == PRINT_SRC_AND_LOC
3061 || val == PRINT_NOTHING)
3065 /* We reached the end of the chain, or we got a null BS to start
3066 with and nothing was printed. */
3067 return PRINT_UNKNOWN;
3070 /* Evaluate the expression EXP and return 1 if value is zero.
3071 This is used inside a catch_errors to evaluate the breakpoint condition.
3072 The argument is a "struct expression *" that has been cast to char * to
3073 make it pass through catch_errors. */
3076 breakpoint_cond_eval (void *exp)
3078 struct value *mark = value_mark ();
3079 int i = !value_true (evaluate_expression ((struct expression *) exp));
3080 value_free_to_mark (mark);
3084 /* Allocate a new bpstat and chain it to the current one. */
3087 bpstat_alloc (const struct bp_location *bl, bpstat cbs /* Current "bs" value */ )
3091 bs = (bpstat) xmalloc (sizeof (*bs));
3093 bs->breakpoint_at = bl;
3094 /* If the condition is false, etc., don't do the commands. */
3095 bs->commands = NULL;
3097 bs->print_it = print_it_normal;
3101 /* The target has stopped with waitstatus WS. Check if any hardware
3102 watchpoints have triggered, according to the target. */
3105 watchpoints_triggered (struct target_waitstatus *ws)
3107 int stopped_by_watchpoint = target_stopped_by_watchpoint ();
3109 struct breakpoint *b;
3111 if (!stopped_by_watchpoint)
3113 /* We were not stopped by a watchpoint. Mark all watchpoints
3114 as not triggered. */
3116 if (b->type == bp_hardware_watchpoint
3117 || b->type == bp_read_watchpoint
3118 || b->type == bp_access_watchpoint)
3119 b->watchpoint_triggered = watch_triggered_no;
3124 if (!target_stopped_data_address (¤t_target, &addr))
3126 /* We were stopped by a watchpoint, but we don't know where.
3127 Mark all watchpoints as unknown. */
3129 if (b->type == bp_hardware_watchpoint
3130 || b->type == bp_read_watchpoint
3131 || b->type == bp_access_watchpoint)
3132 b->watchpoint_triggered = watch_triggered_unknown;
3134 return stopped_by_watchpoint;
3137 /* The target could report the data address. Mark watchpoints
3138 affected by this data address as triggered, and all others as not
3142 if (b->type == bp_hardware_watchpoint
3143 || b->type == bp_read_watchpoint
3144 || b->type == bp_access_watchpoint)
3146 struct bp_location *loc;
3149 b->watchpoint_triggered = watch_triggered_no;
3150 for (loc = b->loc; loc; loc = loc->next)
3151 /* Exact match not required. Within range is
3153 if (target_watchpoint_addr_within_range (¤t_target,
3157 b->watchpoint_triggered = watch_triggered_yes;
3165 /* Possible return values for watchpoint_check (this can't be an enum
3166 because of check_errors). */
3167 /* The watchpoint has been deleted. */
3168 #define WP_DELETED 1
3169 /* The value has changed. */
3170 #define WP_VALUE_CHANGED 2
3171 /* The value has not changed. */
3172 #define WP_VALUE_NOT_CHANGED 3
3174 #define BP_TEMPFLAG 1
3175 #define BP_HARDWAREFLAG 2
3177 /* Evaluate watchpoint condition expression and check if its value changed. */
3180 watchpoint_check (void *p)
3182 bpstat bs = (bpstat) p;
3183 struct breakpoint *b;
3184 struct frame_info *fr;
3185 int within_current_scope;
3187 b = bs->breakpoint_at->owner;
3189 /* If this is a local watchpoint, we only want to check if the
3190 watchpoint frame is in scope if the current thread is the thread
3191 that was used to create the watchpoint. */
3192 if (!watchpoint_in_thread_scope (b))
3193 return WP_VALUE_NOT_CHANGED;
3195 if (b->exp_valid_block == NULL)
3196 within_current_scope = 1;
3199 struct frame_info *frame = get_current_frame ();
3200 struct gdbarch *frame_arch = get_frame_arch (frame);
3201 CORE_ADDR frame_pc = get_frame_pc (frame);
3203 fr = frame_find_by_id (b->watchpoint_frame);
3204 within_current_scope = (fr != NULL);
3206 /* If we've gotten confused in the unwinder, we might have
3207 returned a frame that can't describe this variable. */
3208 if (within_current_scope)
3210 struct symbol *function;
3212 function = get_frame_function (fr);
3213 if (function == NULL
3214 || !contained_in (b->exp_valid_block,
3215 SYMBOL_BLOCK_VALUE (function)))
3216 within_current_scope = 0;
3219 /* in_function_epilogue_p() returns a non-zero value if we're still
3220 in the function but the stack frame has already been invalidated.
3221 Since we can't rely on the values of local variables after the
3222 stack has been destroyed, we are treating the watchpoint in that
3223 state as `not changed' without further checking. Don't mark
3224 watchpoints as changed if the current frame is in an epilogue -
3225 even if they are in some other frame, our view of the stack
3226 is likely to be wrong. */
3227 if (gdbarch_in_function_epilogue_p (frame_arch, frame_pc))
3228 return WP_VALUE_NOT_CHANGED;
3230 if (within_current_scope)
3231 /* If we end up stopping, the current frame will get selected
3232 in normal_stop. So this call to select_frame won't affect
3237 if (within_current_scope)
3239 /* We use value_{,free_to_}mark because it could be a
3240 *long* time before we return to the command level and
3241 call free_all_values. We can't call free_all_values because
3242 we might be in the middle of evaluating a function call. */
3244 struct value *mark = value_mark ();
3245 struct value *new_val;
3247 fetch_watchpoint_value (b->exp, &new_val, NULL, NULL);
3249 /* We use value_equal_contents instead of value_equal because the latter
3250 coerces an array to a pointer, thus comparing just the address of the
3251 array instead of its contents. This is not what we want. */
3252 if ((b->val != NULL) != (new_val != NULL)
3253 || (b->val != NULL && !value_equal_contents (b->val, new_val)))
3255 if (new_val != NULL)
3257 release_value (new_val);
3258 value_free_to_mark (mark);
3260 bs->old_val = b->val;
3263 /* We will stop here */
3264 return WP_VALUE_CHANGED;
3268 /* Nothing changed, don't do anything. */
3269 value_free_to_mark (mark);
3270 /* We won't stop here */
3271 return WP_VALUE_NOT_CHANGED;
3276 /* This seems like the only logical thing to do because
3277 if we temporarily ignored the watchpoint, then when
3278 we reenter the block in which it is valid it contains
3279 garbage (in the case of a function, it may have two
3280 garbage values, one before and one after the prologue).
3281 So we can't even detect the first assignment to it and
3282 watch after that (since the garbage may or may not equal
3283 the first value assigned). */
3284 /* We print all the stop information in print_it_typical(), but
3285 in this case, by the time we call print_it_typical() this bp
3286 will be deleted already. So we have no choice but print the
3287 information here. */
3288 if (ui_out_is_mi_like_p (uiout))
3290 (uiout, "reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_SCOPE));
3291 ui_out_text (uiout, "\nWatchpoint ");
3292 ui_out_field_int (uiout, "wpnum", b->number);
3293 ui_out_text (uiout, " deleted because the program has left the block in\n\
3294 which its expression is valid.\n");
3296 if (b->related_breakpoint)
3297 b->related_breakpoint->disposition = disp_del_at_next_stop;
3298 b->disposition = disp_del_at_next_stop;
3304 /* Return true if it looks like target has stopped due to hitting
3305 breakpoint location BL. This function does not check if we
3306 should stop, only if BL explains the stop. */
3308 bpstat_check_location (const struct bp_location *bl,
3309 struct address_space *aspace, CORE_ADDR bp_addr)
3311 struct breakpoint *b = bl->owner;
3313 /* By definition, the inferior does not report stops at
3315 if (b->type == bp_tracepoint)
3318 if (b->type != bp_watchpoint
3319 && b->type != bp_hardware_watchpoint
3320 && b->type != bp_read_watchpoint
3321 && b->type != bp_access_watchpoint
3322 && b->type != bp_hardware_breakpoint
3323 && b->type != bp_catchpoint) /* a non-watchpoint bp */
3325 if (!breakpoint_address_match (bl->pspace->aspace, bl->address,
3328 if (overlay_debugging /* unmapped overlay section */
3329 && section_is_overlay (bl->section)
3330 && !section_is_mapped (bl->section))
3334 /* Continuable hardware watchpoints are treated as non-existent if the
3335 reason we stopped wasn't a hardware watchpoint (we didn't stop on
3336 some data address). Otherwise gdb won't stop on a break instruction
3337 in the code (not from a breakpoint) when a hardware watchpoint has
3338 been defined. Also skip watchpoints which we know did not trigger
3339 (did not match the data address). */
3341 if ((b->type == bp_hardware_watchpoint
3342 || b->type == bp_read_watchpoint
3343 || b->type == bp_access_watchpoint)
3344 && b->watchpoint_triggered == watch_triggered_no)
3347 if (b->type == bp_hardware_breakpoint)
3349 if (bl->address != bp_addr)
3351 if (overlay_debugging /* unmapped overlay section */
3352 && section_is_overlay (bl->section)
3353 && !section_is_mapped (bl->section))
3357 if (b->type == bp_catchpoint)
3359 gdb_assert (b->ops != NULL && b->ops->breakpoint_hit != NULL);
3360 if (!b->ops->breakpoint_hit (b))
3367 /* If BS refers to a watchpoint, determine if the watched values
3368 has actually changed, and we should stop. If not, set BS->stop
3371 bpstat_check_watchpoint (bpstat bs)
3373 const struct bp_location *bl = bs->breakpoint_at;
3374 struct breakpoint *b = bl->owner;
3376 if (b->type == bp_watchpoint
3377 || b->type == bp_read_watchpoint
3378 || b->type == bp_access_watchpoint
3379 || b->type == bp_hardware_watchpoint)
3383 int must_check_value = 0;
3385 if (b->type == bp_watchpoint)
3386 /* For a software watchpoint, we must always check the
3388 must_check_value = 1;
3389 else if (b->watchpoint_triggered == watch_triggered_yes)
3390 /* We have a hardware watchpoint (read, write, or access)
3391 and the target earlier reported an address watched by
3393 must_check_value = 1;
3394 else if (b->watchpoint_triggered == watch_triggered_unknown
3395 && b->type == bp_hardware_watchpoint)
3396 /* We were stopped by a hardware watchpoint, but the target could
3397 not report the data address. We must check the watchpoint's
3398 value. Access and read watchpoints are out of luck; without
3399 a data address, we can't figure it out. */
3400 must_check_value = 1;
3402 if (must_check_value)
3404 char *message = xstrprintf ("Error evaluating expression for watchpoint %d\n",
3406 struct cleanup *cleanups = make_cleanup (xfree, message);
3407 int e = catch_errors (watchpoint_check, bs, message,
3409 do_cleanups (cleanups);
3413 /* We've already printed what needs to be printed. */
3414 bs->print_it = print_it_done;
3417 case WP_VALUE_CHANGED:
3418 if (b->type == bp_read_watchpoint)
3420 /* Don't stop: read watchpoints shouldn't fire if
3421 the value has changed. This is for targets
3422 which cannot set read-only watchpoints. */
3423 bs->print_it = print_it_noop;
3427 case WP_VALUE_NOT_CHANGED:
3428 if (b->type == bp_hardware_watchpoint
3429 || b->type == bp_watchpoint)
3431 /* Don't stop: write watchpoints shouldn't fire if
3432 the value hasn't changed. */
3433 bs->print_it = print_it_noop;
3441 /* Error from catch_errors. */
3442 printf_filtered (_("Watchpoint %d deleted.\n"), b->number);
3443 if (b->related_breakpoint)
3444 b->related_breakpoint->disposition = disp_del_at_next_stop;
3445 b->disposition = disp_del_at_next_stop;
3446 /* We've already printed what needs to be printed. */
3447 bs->print_it = print_it_done;
3451 else /* must_check_value == 0 */
3453 /* This is a case where some watchpoint(s) triggered, but
3454 not at the address of this watchpoint, or else no
3455 watchpoint triggered after all. So don't print
3456 anything for this watchpoint. */
3457 bs->print_it = print_it_noop;
3464 /* Check conditions (condition proper, frame, thread and ignore count)
3465 of breakpoint referred to by BS. If we should not stop for this
3466 breakpoint, set BS->stop to 0. */
3468 bpstat_check_breakpoint_conditions (bpstat bs, ptid_t ptid)
3470 int thread_id = pid_to_thread_id (ptid);
3471 const struct bp_location *bl = bs->breakpoint_at;
3472 struct breakpoint *b = bl->owner;
3474 if (frame_id_p (b->frame_id)
3475 && !frame_id_eq (b->frame_id, get_stack_frame_id (get_current_frame ())))
3479 int value_is_zero = 0;
3481 /* If this is a scope breakpoint, mark the associated
3482 watchpoint as triggered so that we will handle the
3483 out-of-scope event. We'll get to the watchpoint next
3485 if (b->type == bp_watchpoint_scope)
3486 b->related_breakpoint->watchpoint_triggered = watch_triggered_yes;
3488 if (bl->cond && bl->owner->disposition != disp_del_at_next_stop)
3490 /* We use value_mark and value_free_to_mark because it could
3491 be a long time before we return to the command level and
3492 call free_all_values. We can't call free_all_values
3493 because we might be in the middle of evaluating a
3495 struct value *mark = value_mark ();
3497 /* Need to select the frame, with all that implies so that
3498 the conditions will have the right context. Because we
3499 use the frame, we will not see an inlined function's
3500 variables when we arrive at a breakpoint at the start
3501 of the inlined function; the current frame will be the
3503 select_frame (get_current_frame ());
3505 = catch_errors (breakpoint_cond_eval, (bl->cond),
3506 "Error in testing breakpoint condition:\n",
3508 /* FIXME-someday, should give breakpoint # */
3509 value_free_to_mark (mark);
3511 if (bl->cond && value_is_zero)
3515 else if (b->thread != -1 && b->thread != thread_id)
3519 else if (b->ignore_count > 0)
3522 annotate_ignore_count_change ();
3524 /* Increase the hit count even though we don't
3532 /* Get a bpstat associated with having just stopped at address
3533 BP_ADDR in thread PTID.
3535 Determine whether we stopped at a breakpoint, etc, or whether we
3536 don't understand this stop. Result is a chain of bpstat's such that:
3538 if we don't understand the stop, the result is a null pointer.
3540 if we understand why we stopped, the result is not null.
3542 Each element of the chain refers to a particular breakpoint or
3543 watchpoint at which we have stopped. (We may have stopped for
3544 several reasons concurrently.)
3546 Each element of the chain has valid next, breakpoint_at,
3547 commands, FIXME??? fields. */
3550 bpstat_stop_status (struct address_space *aspace,
3551 CORE_ADDR bp_addr, ptid_t ptid)
3553 struct breakpoint *b = NULL;
3554 struct bp_location *bl, **blp_tmp;
3555 struct bp_location *loc;
3556 /* Root of the chain of bpstat's */
3557 struct bpstats root_bs[1];
3558 /* Pointer to the last thing in the chain currently. */
3559 bpstat bs = root_bs;
3561 int need_remove_insert;
3563 /* ALL_BP_LOCATIONS iteration would break across
3564 update_global_location_list possibly executed by
3565 bpstat_check_breakpoint_conditions's inferior call. */
3569 if (!breakpoint_enabled (b) && b->enable_state != bp_permanent)
3572 for (bl = b->loc; bl != NULL; bl = bl->next)
3574 /* For hardware watchpoints, we look only at the first location.
3575 The watchpoint_check function will work on entire expression,
3576 not the individual locations. For read watchopints, the
3577 watchpoints_triggered function have checked all locations
3579 if (b->type == bp_hardware_watchpoint && bl != b->loc)
3582 if (bl->shlib_disabled)
3585 if (!bpstat_check_location (bl, aspace, bp_addr))
3588 /* Come here if it's a watchpoint, or if the break address matches */
3590 bs = bpstat_alloc (bl, bs); /* Alloc a bpstat to explain stop */
3592 /* Assume we stop. Should we find watchpoint that is not actually
3593 triggered, or if condition of breakpoint is false, we'll reset
3598 bpstat_check_watchpoint (bs);
3602 if (b->type == bp_thread_event || b->type == bp_overlay_event
3603 || b->type == bp_longjmp_master)
3604 /* We do not stop for these. */
3607 bpstat_check_breakpoint_conditions (bs, ptid);
3613 /* We will stop here */
3614 if (b->disposition == disp_disable)
3616 if (b->enable_state != bp_permanent)
3617 b->enable_state = bp_disabled;
3618 update_global_location_list (0);
3622 bs->commands = b->commands;
3624 && (strcmp ("silent", bs->commands->line) == 0
3625 || (xdb_commands && strcmp ("Q",
3626 bs->commands->line) == 0)))
3628 bs->commands = bs->commands->next;
3631 bs->commands = copy_command_lines (bs->commands);
3634 /* Print nothing for this entry if we dont stop or dont print. */
3635 if (bs->stop == 0 || bs->print == 0)
3636 bs->print_it = print_it_noop;
3640 for (ix = 0; VEC_iterate (bp_location_p, moribund_locations, ix, loc); ++ix)
3642 if (breakpoint_address_match (loc->pspace->aspace, loc->address,
3645 bs = bpstat_alloc (loc, bs);
3646 /* For hits of moribund locations, we should just proceed. */
3649 bs->print_it = print_it_noop;
3653 bs->next = NULL; /* Terminate the chain */
3654 bs = root_bs->next; /* Re-grab the head of the chain */
3656 /* If we aren't stopping, the value of some hardware watchpoint may
3657 not have changed, but the intermediate memory locations we are
3658 watching may have. Don't bother if we're stopping; this will get
3660 for (bs = root_bs->next; bs != NULL; bs = bs->next)
3664 need_remove_insert = 0;
3666 for (bs = root_bs->next; bs != NULL; bs = bs->next)
3668 && bs->breakpoint_at->owner
3669 && is_hardware_watchpoint (bs->breakpoint_at->owner))
3671 update_watchpoint (bs->breakpoint_at->owner, 0 /* don't reparse. */);
3672 /* Updating watchpoints invalidates bs->breakpoint_at.
3673 Prevent further code from trying to use it. */
3674 bs->breakpoint_at = NULL;
3675 need_remove_insert = 1;
3678 if (need_remove_insert)
3679 update_global_location_list (1);
3681 return root_bs->next;
3684 /* Tell what to do about this bpstat. */
3686 bpstat_what (bpstat bs)
3688 /* Classify each bpstat as one of the following. */
3691 /* This bpstat element has no effect on the main_action. */
3694 /* There was a watchpoint, stop but don't print. */
3697 /* There was a watchpoint, stop and print. */
3700 /* There was a breakpoint but we're not stopping. */
3703 /* There was a breakpoint, stop but don't print. */
3706 /* There was a breakpoint, stop and print. */
3709 /* We hit the longjmp breakpoint. */
3712 /* We hit the longjmp_resume breakpoint. */
3715 /* We hit the step_resume breakpoint. */
3718 /* We hit the shared library event breakpoint. */
3721 /* We hit the jit event breakpoint. */
3724 /* This is just used to count how many enums there are. */
3728 /* Here is the table which drives this routine. So that we can
3729 format it pretty, we define some abbreviations for the
3730 enum bpstat_what codes. */
3731 #define kc BPSTAT_WHAT_KEEP_CHECKING
3732 #define ss BPSTAT_WHAT_STOP_SILENT
3733 #define sn BPSTAT_WHAT_STOP_NOISY
3734 #define sgl BPSTAT_WHAT_SINGLE
3735 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
3736 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
3737 #define sr BPSTAT_WHAT_STEP_RESUME
3738 #define shl BPSTAT_WHAT_CHECK_SHLIBS
3739 #define jit BPSTAT_WHAT_CHECK_JIT
3741 /* "Can't happen." Might want to print an error message.
3742 abort() is not out of the question, but chances are GDB is just
3743 a bit confused, not unusable. */
3744 #define err BPSTAT_WHAT_STOP_NOISY
3746 /* Given an old action and a class, come up with a new action. */
3747 /* One interesting property of this table is that wp_silent is the same
3748 as bp_silent and wp_noisy is the same as bp_noisy. That is because
3749 after stopping, the check for whether to step over a breakpoint
3750 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
3751 reference to how we stopped. We retain separate wp_silent and
3752 bp_silent codes in case we want to change that someday.
3754 Another possibly interesting property of this table is that
3755 there's a partial ordering, priority-like, of the actions. Once
3756 you've decided that some action is appropriate, you'll never go
3757 back and decide something of a lower priority is better. The
3760 kc < jit clr sgl shl slr sn sr ss
3761 sgl < jit shl slr sn sr ss
3762 slr < jit err shl sn sr ss
3763 clr < jit err shl sn sr ss
3770 What I think this means is that we don't need a damned table
3771 here. If you just put the rows and columns in the right order,
3772 it'd look awfully regular. We could simply walk the bpstat list
3773 and choose the highest priority action we find, with a little
3774 logic to handle the 'err' cases. */
3776 /* step_resume entries: a step resume breakpoint overrides another
3777 breakpoint of signal handling (see comment in wait_for_inferior
3778 at where we set the step_resume breakpoint). */
3780 static const enum bpstat_what_main_action
3781 table[(int) class_last][(int) BPSTAT_WHAT_LAST] =
3784 /* kc ss sn sgl slr clr sr shl jit */
3785 /* no_effect */ {kc, ss, sn, sgl, slr, clr, sr, shl, jit},
3786 /* wp_silent */ {ss, ss, sn, ss, ss, ss, sr, shl, jit},
3787 /* wp_noisy */ {sn, sn, sn, sn, sn, sn, sr, shl, jit},
3788 /* bp_nostop */ {sgl, ss, sn, sgl, slr, slr, sr, shl, jit},
3789 /* bp_silent */ {ss, ss, sn, ss, ss, ss, sr, shl, jit},
3790 /* bp_noisy */ {sn, sn, sn, sn, sn, sn, sr, shl, jit},
3791 /* long_jump */ {slr, ss, sn, slr, slr, err, sr, shl, jit},
3792 /* long_resume */ {clr, ss, sn, err, err, err, sr, shl, jit},
3793 /* step_resume */ {sr, sr, sr, sr, sr, sr, sr, sr, sr },
3794 /* shlib */ {shl, shl, shl, shl, shl, shl, sr, shl, shl},
3795 /* jit_event */ {jit, jit, jit, jit, jit, jit, sr, jit, jit}
3809 enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING;
3810 struct bpstat_what retval;
3812 retval.call_dummy = 0;
3813 for (; bs != NULL; bs = bs->next)
3815 enum class bs_class = no_effect;
3816 if (bs->breakpoint_at == NULL)
3817 /* I suspect this can happen if it was a momentary breakpoint
3818 which has since been deleted. */
3820 if (bs->breakpoint_at->owner == NULL)
3821 bs_class = bp_nostop;
3823 switch (bs->breakpoint_at->owner->type)
3829 case bp_hardware_breakpoint:
3835 bs_class = bp_noisy;
3837 bs_class = bp_silent;
3840 bs_class = bp_nostop;
3843 case bp_hardware_watchpoint:
3844 case bp_read_watchpoint:
3845 case bp_access_watchpoint:
3849 bs_class = wp_noisy;
3851 bs_class = wp_silent;
3854 /* There was a watchpoint, but we're not stopping.
3855 This requires no further action. */
3856 bs_class = no_effect;
3859 bs_class = long_jump;
3861 case bp_longjmp_resume:
3862 bs_class = long_resume;
3864 case bp_step_resume:
3867 bs_class = step_resume;
3870 /* It is for the wrong frame. */
3871 bs_class = bp_nostop;
3873 case bp_watchpoint_scope:
3874 bs_class = bp_nostop;
3876 case bp_shlib_event:
3877 bs_class = shlib_event;
3880 bs_class = jit_event;
3882 case bp_thread_event:
3883 case bp_overlay_event:
3884 case bp_longjmp_master:
3885 bs_class = bp_nostop;
3891 bs_class = bp_noisy;
3893 bs_class = bp_silent;
3896 /* There was a catchpoint, but we're not stopping.
3897 This requires no further action. */
3898 bs_class = no_effect;
3901 /* Make sure the action is stop (silent or noisy),
3902 so infrun.c pops the dummy frame. */
3903 bs_class = bp_silent;
3904 retval.call_dummy = 1;
3907 /* Tracepoint hits should not be reported back to GDB, and
3908 if one got through somehow, it should have been filtered
3910 internal_error (__FILE__, __LINE__,
3911 _("bpstat_what: bp_tracepoint encountered"));
3914 current_action = table[(int) bs_class][(int) current_action];
3916 retval.main_action = current_action;
3920 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3921 without hardware support). This isn't related to a specific bpstat,
3922 just to things like whether watchpoints are set. */
3925 bpstat_should_step (void)
3927 struct breakpoint *b;
3929 if (breakpoint_enabled (b) && b->type == bp_watchpoint && b->loc != NULL)
3935 bpstat_causes_stop (bpstat bs)
3937 for (; bs != NULL; bs = bs->next)
3946 /* Print the LOC location out of the list of B->LOC locations. */
3948 static void print_breakpoint_location (struct breakpoint *b,
3949 struct bp_location *loc,
3951 struct ui_stream *stb)
3953 struct cleanup *old_chain = save_current_program_space ();
3955 if (loc != NULL && loc->shlib_disabled)
3959 set_current_program_space (loc->pspace);
3961 if (b->source_file && loc)
3964 = find_pc_sect_function (loc->address, loc->section);
3967 ui_out_text (uiout, "in ");
3968 ui_out_field_string (uiout, "func",
3969 SYMBOL_PRINT_NAME (sym));
3970 ui_out_wrap_hint (uiout, wrap_indent);
3971 ui_out_text (uiout, " at ");
3973 ui_out_field_string (uiout, "file", b->source_file);
3974 ui_out_text (uiout, ":");
3976 if (ui_out_is_mi_like_p (uiout))
3978 struct symtab_and_line sal = find_pc_line (loc->address, 0);
3979 char *fullname = symtab_to_fullname (sal.symtab);
3982 ui_out_field_string (uiout, "fullname", fullname);
3985 ui_out_field_int (uiout, "line", b->line_number);
3989 print_address_symbolic (loc->gdbarch, loc->address, stb->stream,
3991 ui_out_field_stream (uiout, "at", stb);
3994 ui_out_field_string (uiout, "pending", b->addr_string);
3996 do_cleanups (old_chain);
3999 /* Print B to gdb_stdout. */
4001 print_one_breakpoint_location (struct breakpoint *b,
4002 struct bp_location *loc,
4004 struct bp_location **last_loc,
4005 int print_address_bits,
4008 struct command_line *l;
4010 struct ep_type_description
4015 static struct ep_type_description bptypes[] =
4017 {bp_none, "?deleted?"},
4018 {bp_breakpoint, "breakpoint"},
4019 {bp_hardware_breakpoint, "hw breakpoint"},
4020 {bp_until, "until"},
4021 {bp_finish, "finish"},
4022 {bp_watchpoint, "watchpoint"},
4023 {bp_hardware_watchpoint, "hw watchpoint"},
4024 {bp_read_watchpoint, "read watchpoint"},
4025 {bp_access_watchpoint, "acc watchpoint"},
4026 {bp_longjmp, "longjmp"},
4027 {bp_longjmp_resume, "longjmp resume"},
4028 {bp_step_resume, "step resume"},
4029 {bp_watchpoint_scope, "watchpoint scope"},
4030 {bp_call_dummy, "call dummy"},
4031 {bp_shlib_event, "shlib events"},
4032 {bp_thread_event, "thread events"},
4033 {bp_overlay_event, "overlay events"},
4034 {bp_longjmp_master, "longjmp master"},
4035 {bp_catchpoint, "catchpoint"},
4036 {bp_tracepoint, "tracepoint"},
4037 {bp_jit_event, "jit events"},
4040 static char bpenables[] = "nynny";
4041 char wrap_indent[80];
4042 struct ui_stream *stb = ui_out_stream_new (uiout);
4043 struct cleanup *old_chain = make_cleanup_ui_out_stream_delete (stb);
4044 struct cleanup *bkpt_chain;
4046 int header_of_multiple = 0;
4047 int part_of_multiple = (loc != NULL);
4048 struct value_print_options opts;
4050 get_user_print_options (&opts);
4052 gdb_assert (!loc || loc_number != 0);
4053 /* See comment in print_one_breakpoint concerning
4054 treatment of breakpoints with single disabled
4058 && (b->loc->next != NULL || !b->loc->enabled)))
4059 header_of_multiple = 1;
4064 bkpt_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "bkpt");
4068 if (part_of_multiple)
4071 formatted = xstrprintf ("%d.%d", b->number, loc_number);
4072 ui_out_field_string (uiout, "number", formatted);
4077 ui_out_field_int (uiout, "number", b->number);
4082 if (part_of_multiple)
4083 ui_out_field_skip (uiout, "type");
4086 if (((int) b->type >= (sizeof (bptypes) / sizeof (bptypes[0])))
4087 || ((int) b->type != bptypes[(int) b->type].type))
4088 internal_error (__FILE__, __LINE__,
4089 _("bptypes table does not describe type #%d."),
4091 ui_out_field_string (uiout, "type", bptypes[(int) b->type].description);
4096 if (part_of_multiple)
4097 ui_out_field_skip (uiout, "disp");
4099 ui_out_field_string (uiout, "disp", bpdisp_text (b->disposition));
4104 if (part_of_multiple)
4105 ui_out_field_string (uiout, "enabled", loc->enabled ? "y" : "n");
4107 ui_out_field_fmt (uiout, "enabled", "%c",
4108 bpenables[(int) b->enable_state]);
4109 ui_out_spaces (uiout, 2);
4113 strcpy (wrap_indent, " ");
4114 if (opts.addressprint)
4116 if (print_address_bits <= 32)
4117 strcat (wrap_indent, " ");
4119 strcat (wrap_indent, " ");
4122 if (b->ops != NULL && b->ops->print_one != NULL)
4124 /* Although the print_one can possibly print
4125 all locations, calling it here is not likely
4126 to get any nice result. So, make sure there's
4127 just one location. */
4128 gdb_assert (b->loc == NULL || b->loc->next == NULL);
4129 b->ops->print_one (b, last_loc);
4135 internal_error (__FILE__, __LINE__,
4136 _("print_one_breakpoint: bp_none encountered\n"));
4140 case bp_hardware_watchpoint:
4141 case bp_read_watchpoint:
4142 case bp_access_watchpoint:
4143 /* Field 4, the address, is omitted (which makes the columns
4144 not line up too nicely with the headers, but the effect
4145 is relatively readable). */
4146 if (opts.addressprint)
4147 ui_out_field_skip (uiout, "addr");
4149 ui_out_field_string (uiout, "what", b->exp_string);
4153 case bp_hardware_breakpoint:
4157 case bp_longjmp_resume:
4158 case bp_step_resume:
4159 case bp_watchpoint_scope:
4161 case bp_shlib_event:
4162 case bp_thread_event:
4163 case bp_overlay_event:
4164 case bp_longjmp_master:
4167 if (opts.addressprint)
4170 if (header_of_multiple)
4171 ui_out_field_string (uiout, "addr", "<MULTIPLE>");
4172 else if (b->loc == NULL || loc->shlib_disabled)
4173 ui_out_field_string (uiout, "addr", "<PENDING>");
4175 ui_out_field_core_addr (uiout, "addr",
4176 loc->gdbarch, loc->address);
4179 if (!header_of_multiple)
4180 print_breakpoint_location (b, loc, wrap_indent, stb);
4187 /* For backward compatibility, don't display inferiors unless there
4190 && !header_of_multiple
4192 || (!gdbarch_has_global_breakpoints (target_gdbarch)
4193 && (number_of_program_spaces () > 1
4194 || number_of_inferiors () > 1)
4195 && loc->owner->type != bp_catchpoint)))
4197 struct inferior *inf;
4200 for (inf = inferior_list; inf != NULL; inf = inf->next)
4202 if (inf->pspace == loc->pspace)
4207 ui_out_text (uiout, " inf ");
4210 ui_out_text (uiout, ", ");
4211 ui_out_text (uiout, plongest (inf->num));
4216 if (!part_of_multiple)
4218 if (b->thread != -1)
4220 /* FIXME: This seems to be redundant and lost here; see the
4221 "stop only in" line a little further down. */
4222 ui_out_text (uiout, " thread ");
4223 ui_out_field_int (uiout, "thread", b->thread);
4225 else if (b->task != 0)
4227 ui_out_text (uiout, " task ");
4228 ui_out_field_int (uiout, "task", b->task);
4232 ui_out_text (uiout, "\n");
4234 if (part_of_multiple && frame_id_p (b->frame_id))
4237 ui_out_text (uiout, "\tstop only in stack frame at ");
4238 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
4240 ui_out_field_core_addr (uiout, "frame",
4241 b->gdbarch, b->frame_id.stack_addr);
4242 ui_out_text (uiout, "\n");
4245 if (!part_of_multiple && b->cond_string && !ada_exception_catchpoint_p (b))
4247 /* We do not print the condition for Ada exception catchpoints
4248 because the condition is an internal implementation detail
4249 that we do not want to expose to the user. */
4251 if (b->type == bp_tracepoint)
4252 ui_out_text (uiout, "\ttrace only if ");
4254 ui_out_text (uiout, "\tstop only if ");
4255 ui_out_field_string (uiout, "cond", b->cond_string);
4256 ui_out_text (uiout, "\n");
4259 if (!part_of_multiple && b->thread != -1)
4261 /* FIXME should make an annotation for this */
4262 ui_out_text (uiout, "\tstop only in thread ");
4263 ui_out_field_int (uiout, "thread", b->thread);
4264 ui_out_text (uiout, "\n");
4267 if (!part_of_multiple && b->hit_count)
4269 /* FIXME should make an annotation for this */
4270 if (ep_is_catchpoint (b))
4271 ui_out_text (uiout, "\tcatchpoint");
4273 ui_out_text (uiout, "\tbreakpoint");
4274 ui_out_text (uiout, " already hit ");
4275 ui_out_field_int (uiout, "times", b->hit_count);
4276 if (b->hit_count == 1)
4277 ui_out_text (uiout, " time\n");
4279 ui_out_text (uiout, " times\n");
4282 /* Output the count also if it is zero, but only if this is
4283 mi. FIXME: Should have a better test for this. */
4284 if (ui_out_is_mi_like_p (uiout))
4285 if (!part_of_multiple && b->hit_count == 0)
4286 ui_out_field_int (uiout, "times", b->hit_count);
4288 if (!part_of_multiple && b->ignore_count)
4291 ui_out_text (uiout, "\tignore next ");
4292 ui_out_field_int (uiout, "ignore", b->ignore_count);
4293 ui_out_text (uiout, " hits\n");
4297 if (!part_of_multiple && l)
4299 struct cleanup *script_chain;
4302 script_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "script");
4303 print_command_lines (uiout, l, 4);
4304 do_cleanups (script_chain);
4307 if (!part_of_multiple && b->pass_count)
4309 annotate_field (10);
4310 ui_out_text (uiout, "\tpass count ");
4311 ui_out_field_int (uiout, "pass", b->pass_count);
4312 ui_out_text (uiout, " \n");
4315 if (!part_of_multiple && b->step_count)
4317 annotate_field (11);
4318 ui_out_text (uiout, "\tstep count ");
4319 ui_out_field_int (uiout, "step", b->step_count);
4320 ui_out_text (uiout, " \n");
4323 if (!part_of_multiple && b->actions)
4325 struct action_line *action;
4326 annotate_field (12);
4327 for (action = b->actions; action; action = action->next)
4329 ui_out_text (uiout, " A\t");
4330 ui_out_text (uiout, action->action);
4331 ui_out_text (uiout, "\n");
4335 if (ui_out_is_mi_like_p (uiout) && !part_of_multiple)
4338 ui_out_field_string (uiout, "original-location", b->addr_string);
4339 else if (b->exp_string)
4340 ui_out_field_string (uiout, "original-location", b->exp_string);
4343 do_cleanups (bkpt_chain);
4344 do_cleanups (old_chain);
4348 print_one_breakpoint (struct breakpoint *b,
4349 struct bp_location **last_loc, int print_address_bits,
4352 print_one_breakpoint_location (b, NULL, 0, last_loc,
4353 print_address_bits, allflag);
4355 /* If this breakpoint has custom print function,
4356 it's already printed. Otherwise, print individual
4357 locations, if any. */
4358 if (b->ops == NULL || b->ops->print_one == NULL)
4360 /* If breakpoint has a single location that is
4361 disabled, we print it as if it had
4362 several locations, since otherwise it's hard to
4363 represent "breakpoint enabled, location disabled"
4365 Note that while hardware watchpoints have
4366 several locations internally, that's no a property
4369 && !is_hardware_watchpoint (b)
4370 && (b->loc->next || !b->loc->enabled)
4371 && !ui_out_is_mi_like_p (uiout))
4373 struct bp_location *loc;
4375 for (loc = b->loc; loc; loc = loc->next, ++n)
4376 print_one_breakpoint_location (b, loc, n, last_loc,
4377 print_address_bits, allflag);
4383 breakpoint_address_bits (struct breakpoint *b)
4385 int print_address_bits = 0;
4386 struct bp_location *loc;
4388 for (loc = b->loc; loc; loc = loc->next)
4390 int addr_bit = gdbarch_addr_bit (loc->gdbarch);
4391 if (addr_bit > print_address_bits)
4392 print_address_bits = addr_bit;
4395 return print_address_bits;
4398 struct captured_breakpoint_query_args
4404 do_captured_breakpoint_query (struct ui_out *uiout, void *data)
4406 struct captured_breakpoint_query_args *args = data;
4407 struct breakpoint *b;
4408 struct bp_location *dummy_loc = NULL;
4411 if (args->bnum == b->number)
4413 int print_address_bits = breakpoint_address_bits (b);
4414 print_one_breakpoint (b, &dummy_loc, print_address_bits, 0);
4422 gdb_breakpoint_query (struct ui_out *uiout, int bnum, char **error_message)
4424 struct captured_breakpoint_query_args args;
4426 /* For the moment we don't trust print_one_breakpoint() to not throw
4428 if (catch_exceptions_with_msg (uiout, do_captured_breakpoint_query, &args,
4429 error_message, RETURN_MASK_ALL) < 0)
4435 /* Return non-zero if B is user settable (breakpoints, watchpoints,
4436 catchpoints, et.al.). */
4439 user_settable_breakpoint (const struct breakpoint *b)
4441 return (b->type == bp_breakpoint
4442 || b->type == bp_catchpoint
4443 || b->type == bp_hardware_breakpoint
4444 || b->type == bp_tracepoint
4445 || b->type == bp_watchpoint
4446 || b->type == bp_read_watchpoint
4447 || b->type == bp_access_watchpoint
4448 || b->type == bp_hardware_watchpoint);
4451 /* Print information on user settable breakpoint (watchpoint, etc)
4452 number BNUM. If BNUM is -1 print all user settable breakpoints.
4453 If ALLFLAG is non-zero, include non- user settable breakpoints. */
4456 breakpoint_1 (int bnum, int allflag)
4458 struct breakpoint *b;
4459 struct bp_location *last_loc = NULL;
4460 int nr_printable_breakpoints;
4461 struct cleanup *bkpttbl_chain;
4462 struct value_print_options opts;
4463 int print_address_bits = 0;
4465 get_user_print_options (&opts);
4467 /* Compute the number of rows in the table, as well as the
4468 size required for address fields. */
4469 nr_printable_breakpoints = 0;
4472 || bnum == b->number)
4474 if (allflag || user_settable_breakpoint (b))
4476 int addr_bit = breakpoint_address_bits (b);
4477 if (addr_bit > print_address_bits)
4478 print_address_bits = addr_bit;
4480 nr_printable_breakpoints++;
4484 if (opts.addressprint)
4486 = make_cleanup_ui_out_table_begin_end (uiout, 6, nr_printable_breakpoints,
4490 = make_cleanup_ui_out_table_begin_end (uiout, 5, nr_printable_breakpoints,
4493 if (nr_printable_breakpoints > 0)
4494 annotate_breakpoints_headers ();
4495 if (nr_printable_breakpoints > 0)
4497 ui_out_table_header (uiout, 7, ui_left, "number", "Num"); /* 1 */
4498 if (nr_printable_breakpoints > 0)
4500 ui_out_table_header (uiout, 14, ui_left, "type", "Type"); /* 2 */
4501 if (nr_printable_breakpoints > 0)
4503 ui_out_table_header (uiout, 4, ui_left, "disp", "Disp"); /* 3 */
4504 if (nr_printable_breakpoints > 0)
4506 ui_out_table_header (uiout, 3, ui_left, "enabled", "Enb"); /* 4 */
4507 if (opts.addressprint)
4509 if (nr_printable_breakpoints > 0)
4511 if (print_address_bits <= 32)
4512 ui_out_table_header (uiout, 10, ui_left, "addr", "Address");/* 5 */
4514 ui_out_table_header (uiout, 18, ui_left, "addr", "Address");/* 5 */
4516 if (nr_printable_breakpoints > 0)
4518 ui_out_table_header (uiout, 40, ui_noalign, "what", "What"); /* 6 */
4519 ui_out_table_body (uiout);
4520 if (nr_printable_breakpoints > 0)
4521 annotate_breakpoints_table ();
4525 || bnum == b->number)
4527 /* We only print out user settable breakpoints unless the
4529 if (allflag || user_settable_breakpoint (b))
4530 print_one_breakpoint (b, &last_loc, print_address_bits, allflag);
4533 do_cleanups (bkpttbl_chain);
4535 if (nr_printable_breakpoints == 0)
4538 ui_out_message (uiout, 0, "No breakpoints or watchpoints.\n");
4540 ui_out_message (uiout, 0, "No breakpoint or watchpoint number %d.\n",
4545 if (last_loc && !server_command)
4546 set_next_address (last_loc->gdbarch, last_loc->address);
4549 /* FIXME? Should this be moved up so that it is only called when
4550 there have been breakpoints? */
4551 annotate_breakpoints_table_end ();
4555 breakpoints_info (char *bnum_exp, int from_tty)
4560 bnum = parse_and_eval_long (bnum_exp);
4562 breakpoint_1 (bnum, 0);
4566 maintenance_info_breakpoints (char *bnum_exp, int from_tty)
4571 bnum = parse_and_eval_long (bnum_exp);
4573 breakpoint_1 (bnum, 1);
4577 breakpoint_has_pc (struct breakpoint *b,
4578 struct program_space *pspace,
4579 CORE_ADDR pc, struct obj_section *section)
4581 struct bp_location *bl = b->loc;
4582 for (; bl; bl = bl->next)
4584 if (bl->pspace == pspace
4585 && bl->address == pc
4586 && (!overlay_debugging || bl->section == section))
4592 /* Print a message describing any breakpoints set at PC. This
4593 concerns with logical breakpoints, so we match program spaces, not
4597 describe_other_breakpoints (struct gdbarch *gdbarch,
4598 struct program_space *pspace, CORE_ADDR pc,
4599 struct obj_section *section, int thread)
4602 struct breakpoint *b;
4605 others += breakpoint_has_pc (b, pspace, pc, section);
4609 printf_filtered (_("Note: breakpoint "));
4610 else /* if (others == ???) */
4611 printf_filtered (_("Note: breakpoints "));
4613 if (breakpoint_has_pc (b, pspace, pc, section))
4616 printf_filtered ("%d", b->number);
4617 if (b->thread == -1 && thread != -1)
4618 printf_filtered (" (all threads)");
4619 else if (b->thread != -1)
4620 printf_filtered (" (thread %d)", b->thread);
4621 printf_filtered ("%s%s ",
4622 ((b->enable_state == bp_disabled
4623 || b->enable_state == bp_call_disabled
4624 || b->enable_state == bp_startup_disabled)
4626 : b->enable_state == bp_permanent
4630 : ((others == 1) ? " and" : ""));
4632 printf_filtered (_("also set at pc "));
4633 fputs_filtered (paddress (gdbarch, pc), gdb_stdout);
4634 printf_filtered (".\n");
4638 /* Set the default place to put a breakpoint
4639 for the `break' command with no arguments. */
4642 set_default_breakpoint (int valid, struct program_space *pspace,
4643 CORE_ADDR addr, struct symtab *symtab,
4646 default_breakpoint_valid = valid;
4647 default_breakpoint_pspace = pspace;
4648 default_breakpoint_address = addr;
4649 default_breakpoint_symtab = symtab;
4650 default_breakpoint_line = line;
4653 /* Return true iff it is meaningful to use the address member of
4654 BPT. For some breakpoint types, the address member is irrelevant
4655 and it makes no sense to attempt to compare it to other addresses
4656 (or use it for any other purpose either).
4658 More specifically, each of the following breakpoint types will always
4659 have a zero valued address and we don't want to mark breakpoints of any of
4660 these types to be a duplicate of an actual breakpoint at address zero:
4668 breakpoint_address_is_meaningful (struct breakpoint *bpt)
4670 enum bptype type = bpt->type;
4672 return (type != bp_watchpoint && type != bp_catchpoint);
4675 /* Assuming LOC1 and LOC2's owners are hardware watchpoints, returns
4676 true if LOC1 and LOC2 represent the same watchpoint location. */
4679 watchpoint_locations_match (struct bp_location *loc1, struct bp_location *loc2)
4681 return (loc1->owner->type == loc2->owner->type
4682 && loc1->pspace->aspace == loc2->pspace->aspace
4683 && loc1->address == loc2->address
4684 && loc1->length == loc2->length);
4687 /* Returns true if {ASPACE1,ADDR1} and {ASPACE2,ADDR2} represent the
4688 same breakpoint location. In most targets, this can only be true
4689 if ASPACE1 matches ASPACE2. On targets that have global
4690 breakpoints, the address space doesn't really matter. */
4693 breakpoint_address_match (struct address_space *aspace1, CORE_ADDR addr1,
4694 struct address_space *aspace2, CORE_ADDR addr2)
4696 return ((gdbarch_has_global_breakpoints (target_gdbarch)
4697 || aspace1 == aspace2)
4701 /* Assuming LOC1 and LOC2's types' have meaningful target addresses
4702 (breakpoint_address_is_meaningful), returns true if LOC1 and LOC2
4703 represent the same location. */
4706 breakpoint_locations_match (struct bp_location *loc1, struct bp_location *loc2)
4708 int hw_point1 = is_hardware_watchpoint (loc1->owner);
4709 int hw_point2 = is_hardware_watchpoint (loc2->owner);
4711 if (hw_point1 != hw_point2)
4714 return watchpoint_locations_match (loc1, loc2);
4716 return breakpoint_address_match (loc1->pspace->aspace, loc1->address,
4717 loc2->pspace->aspace, loc2->address);
4721 breakpoint_adjustment_warning (CORE_ADDR from_addr, CORE_ADDR to_addr,
4722 int bnum, int have_bnum)
4727 strcpy (astr1, hex_string_custom ((unsigned long) from_addr, 8));
4728 strcpy (astr2, hex_string_custom ((unsigned long) to_addr, 8));
4730 warning (_("Breakpoint %d address previously adjusted from %s to %s."),
4731 bnum, astr1, astr2);
4733 warning (_("Breakpoint address adjusted from %s to %s."), astr1, astr2);
4736 /* Adjust a breakpoint's address to account for architectural constraints
4737 on breakpoint placement. Return the adjusted address. Note: Very
4738 few targets require this kind of adjustment. For most targets,
4739 this function is simply the identity function. */
4742 adjust_breakpoint_address (struct gdbarch *gdbarch,
4743 CORE_ADDR bpaddr, enum bptype bptype)
4745 if (!gdbarch_adjust_breakpoint_address_p (gdbarch))
4747 /* Very few targets need any kind of breakpoint adjustment. */
4750 else if (bptype == bp_watchpoint
4751 || bptype == bp_hardware_watchpoint
4752 || bptype == bp_read_watchpoint
4753 || bptype == bp_access_watchpoint
4754 || bptype == bp_catchpoint)
4756 /* Watchpoints and the various bp_catch_* eventpoints should not
4757 have their addresses modified. */
4762 CORE_ADDR adjusted_bpaddr;
4764 /* Some targets have architectural constraints on the placement
4765 of breakpoint instructions. Obtain the adjusted address. */
4766 adjusted_bpaddr = gdbarch_adjust_breakpoint_address (gdbarch, bpaddr);
4768 /* An adjusted breakpoint address can significantly alter
4769 a user's expectations. Print a warning if an adjustment
4771 if (adjusted_bpaddr != bpaddr)
4772 breakpoint_adjustment_warning (bpaddr, adjusted_bpaddr, 0, 0);
4774 return adjusted_bpaddr;
4778 /* Allocate a struct bp_location. */
4780 static struct bp_location *
4781 allocate_bp_location (struct breakpoint *bpt)
4783 struct bp_location *loc, *loc_p;
4785 loc = xmalloc (sizeof (struct bp_location));
4786 memset (loc, 0, sizeof (*loc));
4790 loc->shlib_disabled = 0;
4800 case bp_longjmp_resume:
4801 case bp_step_resume:
4802 case bp_watchpoint_scope:
4804 case bp_shlib_event:
4805 case bp_thread_event:
4806 case bp_overlay_event:
4808 case bp_longjmp_master:
4809 loc->loc_type = bp_loc_software_breakpoint;
4811 case bp_hardware_breakpoint:
4812 loc->loc_type = bp_loc_hardware_breakpoint;
4814 case bp_hardware_watchpoint:
4815 case bp_read_watchpoint:
4816 case bp_access_watchpoint:
4817 loc->loc_type = bp_loc_hardware_watchpoint;
4821 loc->loc_type = bp_loc_other;
4824 internal_error (__FILE__, __LINE__, _("unknown breakpoint type"));
4830 static void free_bp_location (struct bp_location *loc)
4835 if (loc->function_name)
4836 xfree (loc->function_name);
4841 /* Helper to set_raw_breakpoint below. Creates a breakpoint
4842 that has type BPTYPE and has no locations as yet. */
4843 /* This function is used in gdbtk sources and thus can not be made static. */
4845 static struct breakpoint *
4846 set_raw_breakpoint_without_location (struct gdbarch *gdbarch,
4849 struct breakpoint *b, *b1;
4851 b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint));
4852 memset (b, 0, sizeof (*b));
4855 b->gdbarch = gdbarch;
4856 b->language = current_language->la_language;
4857 b->input_radix = input_radix;
4859 b->enable_state = bp_enabled;
4862 b->ignore_count = 0;
4864 b->frame_id = null_frame_id;
4865 b->forked_inferior_pid = null_ptid;
4866 b->exec_pathname = NULL;
4867 b->syscalls_to_be_caught = NULL;
4869 b->condition_not_parsed = 0;
4871 /* Add this breakpoint to the end of the chain
4872 so that a list of breakpoints will come out in order
4873 of increasing numbers. */
4875 b1 = breakpoint_chain;
4877 breakpoint_chain = b;
4887 /* Initialize loc->function_name. */
4889 set_breakpoint_location_function (struct bp_location *loc)
4891 if (loc->owner->type == bp_breakpoint
4892 || loc->owner->type == bp_hardware_breakpoint
4893 || loc->owner->type == bp_tracepoint)
4895 find_pc_partial_function (loc->address, &(loc->function_name),
4897 if (loc->function_name)
4898 loc->function_name = xstrdup (loc->function_name);
4902 /* Attempt to determine architecture of location identified by SAL. */
4903 static struct gdbarch *
4904 get_sal_arch (struct symtab_and_line sal)
4907 return get_objfile_arch (sal.section->objfile);
4909 return get_objfile_arch (sal.symtab->objfile);
4914 /* set_raw_breakpoint is a low level routine for allocating and
4915 partially initializing a breakpoint of type BPTYPE. The newly
4916 created breakpoint's address, section, source file name, and line
4917 number are provided by SAL. The newly created and partially
4918 initialized breakpoint is added to the breakpoint chain and
4919 is also returned as the value of this function.
4921 It is expected that the caller will complete the initialization of
4922 the newly created breakpoint struct as well as output any status
4923 information regarding the creation of a new breakpoint. In
4924 particular, set_raw_breakpoint does NOT set the breakpoint
4925 number! Care should be taken to not allow an error to occur
4926 prior to completing the initialization of the breakpoint. If this
4927 should happen, a bogus breakpoint will be left on the chain. */
4930 set_raw_breakpoint (struct gdbarch *gdbarch,
4931 struct symtab_and_line sal, enum bptype bptype)
4933 struct breakpoint *b = set_raw_breakpoint_without_location (gdbarch, bptype);
4934 CORE_ADDR adjusted_address;
4935 struct gdbarch *loc_gdbarch;
4937 loc_gdbarch = get_sal_arch (sal);
4939 loc_gdbarch = b->gdbarch;
4941 if (bptype != bp_catchpoint)
4942 gdb_assert (sal.pspace != NULL);
4944 /* Adjust the breakpoint's address prior to allocating a location.
4945 Once we call allocate_bp_location(), that mostly uninitialized
4946 location will be placed on the location chain. Adjustment of the
4947 breakpoint may cause target_read_memory() to be called and we do
4948 not want its scan of the location chain to find a breakpoint and
4949 location that's only been partially initialized. */
4950 adjusted_address = adjust_breakpoint_address (loc_gdbarch, sal.pc, b->type);
4952 b->loc = allocate_bp_location (b);
4953 b->loc->gdbarch = loc_gdbarch;
4954 b->loc->requested_address = sal.pc;
4955 b->loc->address = adjusted_address;
4956 b->loc->pspace = sal.pspace;
4958 /* Store the program space that was used to set the breakpoint, for
4959 breakpoint resetting. */
4960 b->pspace = sal.pspace;
4962 if (sal.symtab == NULL)
4963 b->source_file = NULL;
4965 b->source_file = xstrdup (sal.symtab->filename);
4966 b->loc->section = sal.section;
4967 b->line_number = sal.line;
4969 set_breakpoint_location_function (b->loc);
4971 breakpoints_changed ();
4977 /* Note that the breakpoint object B describes a permanent breakpoint
4978 instruction, hard-wired into the inferior's code. */
4980 make_breakpoint_permanent (struct breakpoint *b)
4982 struct bp_location *bl;
4983 b->enable_state = bp_permanent;
4985 /* By definition, permanent breakpoints are already present in the code.
4986 Mark all locations as inserted. For now, make_breakpoint_permanent
4987 is called in just one place, so it's hard to say if it's reasonable
4988 to have permanent breakpoint with multiple locations or not,
4989 but it's easy to implmement. */
4990 for (bl = b->loc; bl; bl = bl->next)
4994 /* Call this routine when stepping and nexting to enable a breakpoint
4995 if we do a longjmp() in THREAD. When we hit that breakpoint, call
4996 set_longjmp_resume_breakpoint() to figure out where we are going. */
4999 set_longjmp_breakpoint (int thread)
5001 struct breakpoint *b, *temp;
5003 /* To avoid having to rescan all objfile symbols at every step,
5004 we maintain a list of continually-inserted but always disabled
5005 longjmp "master" breakpoints. Here, we simply create momentary
5006 clones of those and enable them for the requested thread. */
5007 ALL_BREAKPOINTS_SAFE (b, temp)
5008 if (b->pspace == current_program_space
5009 && b->type == bp_longjmp_master)
5011 struct breakpoint *clone = clone_momentary_breakpoint (b);
5012 clone->type = bp_longjmp;
5013 clone->thread = thread;
5017 /* Delete all longjmp breakpoints from THREAD. */
5019 delete_longjmp_breakpoint (int thread)
5021 struct breakpoint *b, *temp;
5023 ALL_BREAKPOINTS_SAFE (b, temp)
5024 if (b->type == bp_longjmp)
5026 if (b->thread == thread)
5027 delete_breakpoint (b);
5032 enable_overlay_breakpoints (void)
5034 struct breakpoint *b;
5037 if (b->type == bp_overlay_event)
5039 b->enable_state = bp_enabled;
5040 update_global_location_list (1);
5041 overlay_events_enabled = 1;
5046 disable_overlay_breakpoints (void)
5048 struct breakpoint *b;
5051 if (b->type == bp_overlay_event)
5053 b->enable_state = bp_disabled;
5054 update_global_location_list (0);
5055 overlay_events_enabled = 0;
5060 create_thread_event_breakpoint (struct gdbarch *gdbarch, CORE_ADDR address)
5062 struct breakpoint *b;
5064 b = create_internal_breakpoint (gdbarch, address, bp_thread_event);
5066 b->enable_state = bp_enabled;
5067 /* addr_string has to be used or breakpoint_re_set will delete me. */
5069 = xstrprintf ("*%s", paddress (b->loc->gdbarch, b->loc->address));
5071 update_global_location_list_nothrow (1);
5077 remove_thread_event_breakpoints (void)
5079 struct breakpoint *b, *temp;
5081 ALL_BREAKPOINTS_SAFE (b, temp)
5082 if (b->type == bp_thread_event
5083 && b->loc->pspace == current_program_space)
5084 delete_breakpoint (b);
5087 struct captured_parse_breakpoint_args
5090 struct symtabs_and_lines *sals_p;
5091 char ***addr_string_p;
5095 struct lang_and_radix
5101 /* Create a breakpoint for JIT code registration and unregistration. */
5104 create_jit_event_breakpoint (struct gdbarch *gdbarch, CORE_ADDR address)
5106 struct breakpoint *b;
5108 b = create_internal_breakpoint (gdbarch, address, bp_jit_event);
5109 update_global_location_list_nothrow (1);
5114 remove_solib_event_breakpoints (void)
5116 struct breakpoint *b, *temp;
5118 ALL_BREAKPOINTS_SAFE (b, temp)
5119 if (b->type == bp_shlib_event
5120 && b->loc->pspace == current_program_space)
5121 delete_breakpoint (b);
5125 create_solib_event_breakpoint (struct gdbarch *gdbarch, CORE_ADDR address)
5127 struct breakpoint *b;
5129 b = create_internal_breakpoint (gdbarch, address, bp_shlib_event);
5130 update_global_location_list_nothrow (1);
5134 /* Disable any breakpoints that are on code in shared libraries. Only
5135 apply to enabled breakpoints, disabled ones can just stay disabled. */
5138 disable_breakpoints_in_shlibs (void)
5140 struct bp_location *loc, **locp_tmp;
5142 ALL_BP_LOCATIONS (loc, locp_tmp)
5144 struct breakpoint *b = loc->owner;
5145 /* We apply the check to all breakpoints, including disabled
5146 for those with loc->duplicate set. This is so that when breakpoint
5147 becomes enabled, or the duplicate is removed, gdb will try to insert
5148 all breakpoints. If we don't set shlib_disabled here, we'll try
5149 to insert those breakpoints and fail. */
5150 if (((b->type == bp_breakpoint)
5151 || (b->type == bp_hardware_breakpoint)
5152 || (b->type == bp_tracepoint))
5153 && loc->pspace == current_program_space
5154 && !loc->shlib_disabled
5156 && PC_SOLIB (loc->address)
5158 && solib_name_from_address (loc->pspace, loc->address)
5162 loc->shlib_disabled = 1;
5167 /* Disable any breakpoints that are in in an unloaded shared library. Only
5168 apply to enabled breakpoints, disabled ones can just stay disabled. */
5171 disable_breakpoints_in_unloaded_shlib (struct so_list *solib)
5173 struct bp_location *loc, **locp_tmp;
5174 int disabled_shlib_breaks = 0;
5176 /* SunOS a.out shared libraries are always mapped, so do not
5177 disable breakpoints; they will only be reported as unloaded
5178 through clear_solib when GDB discards its shared library
5179 list. See clear_solib for more information. */
5180 if (exec_bfd != NULL
5181 && bfd_get_flavour (exec_bfd) == bfd_target_aout_flavour)
5184 ALL_BP_LOCATIONS (loc, locp_tmp)
5186 struct breakpoint *b = loc->owner;
5187 if ((loc->loc_type == bp_loc_hardware_breakpoint
5188 || loc->loc_type == bp_loc_software_breakpoint)
5189 && solib->pspace == loc->pspace
5190 && !loc->shlib_disabled
5191 && (b->type == bp_breakpoint || b->type == bp_hardware_breakpoint)
5192 && solib_contains_address_p (solib, loc->address))
5194 loc->shlib_disabled = 1;
5195 /* At this point, we cannot rely on remove_breakpoint
5196 succeeding so we must mark the breakpoint as not inserted
5197 to prevent future errors occurring in remove_breakpoints. */
5199 if (!disabled_shlib_breaks)
5201 target_terminal_ours_for_output ();
5202 warning (_("Temporarily disabling breakpoints for unloaded shared library \"%s\""),
5205 disabled_shlib_breaks = 1;
5210 /* FORK & VFORK catchpoints. */
5212 /* Implement the "insert" breakpoint_ops method for fork catchpoints. */
5215 insert_catch_fork (struct breakpoint *b)
5217 target_insert_fork_catchpoint (PIDGET (inferior_ptid));
5220 /* Implement the "remove" breakpoint_ops method for fork catchpoints. */
5223 remove_catch_fork (struct breakpoint *b)
5225 return target_remove_fork_catchpoint (PIDGET (inferior_ptid));
5228 /* Implement the "breakpoint_hit" breakpoint_ops method for fork
5232 breakpoint_hit_catch_fork (struct breakpoint *b)
5234 return inferior_has_forked (inferior_ptid, &b->forked_inferior_pid);
5237 /* Implement the "print_it" breakpoint_ops method for fork catchpoints. */
5239 static enum print_stop_action
5240 print_it_catch_fork (struct breakpoint *b)
5242 annotate_catchpoint (b->number);
5243 printf_filtered (_("\nCatchpoint %d (forked process %d), "),
5244 b->number, ptid_get_pid (b->forked_inferior_pid));
5245 return PRINT_SRC_AND_LOC;
5248 /* Implement the "print_one" breakpoint_ops method for fork catchpoints. */
5251 print_one_catch_fork (struct breakpoint *b, struct bp_location **last_loc)
5253 struct value_print_options opts;
5255 get_user_print_options (&opts);
5257 /* Field 4, the address, is omitted (which makes the columns
5258 not line up too nicely with the headers, but the effect
5259 is relatively readable). */
5260 if (opts.addressprint)
5261 ui_out_field_skip (uiout, "addr");
5263 ui_out_text (uiout, "fork");
5264 if (!ptid_equal (b->forked_inferior_pid, null_ptid))
5266 ui_out_text (uiout, ", process ");
5267 ui_out_field_int (uiout, "what",
5268 ptid_get_pid (b->forked_inferior_pid));
5269 ui_out_spaces (uiout, 1);
5273 /* Implement the "print_mention" breakpoint_ops method for fork
5277 print_mention_catch_fork (struct breakpoint *b)
5279 printf_filtered (_("Catchpoint %d (fork)"), b->number);
5282 /* The breakpoint_ops structure to be used in fork catchpoints. */
5284 static struct breakpoint_ops catch_fork_breakpoint_ops =
5288 breakpoint_hit_catch_fork,
5289 print_it_catch_fork,
5290 print_one_catch_fork,
5291 print_mention_catch_fork
5294 /* Implement the "insert" breakpoint_ops method for vfork catchpoints. */
5297 insert_catch_vfork (struct breakpoint *b)
5299 target_insert_vfork_catchpoint (PIDGET (inferior_ptid));
5302 /* Implement the "remove" breakpoint_ops method for vfork catchpoints. */
5305 remove_catch_vfork (struct breakpoint *b)
5307 return target_remove_vfork_catchpoint (PIDGET (inferior_ptid));
5310 /* Implement the "breakpoint_hit" breakpoint_ops method for vfork
5314 breakpoint_hit_catch_vfork (struct breakpoint *b)
5316 return inferior_has_vforked (inferior_ptid, &b->forked_inferior_pid);
5319 /* Implement the "print_it" breakpoint_ops method for vfork catchpoints. */
5321 static enum print_stop_action
5322 print_it_catch_vfork (struct breakpoint *b)
5324 annotate_catchpoint (b->number);
5325 printf_filtered (_("\nCatchpoint %d (vforked process %d), "),
5326 b->number, ptid_get_pid (b->forked_inferior_pid));
5327 return PRINT_SRC_AND_LOC;
5330 /* Implement the "print_one" breakpoint_ops method for vfork catchpoints. */
5333 print_one_catch_vfork (struct breakpoint *b, struct bp_location **last_loc)
5335 struct value_print_options opts;
5337 get_user_print_options (&opts);
5338 /* Field 4, the address, is omitted (which makes the columns
5339 not line up too nicely with the headers, but the effect
5340 is relatively readable). */
5341 if (opts.addressprint)
5342 ui_out_field_skip (uiout, "addr");
5344 ui_out_text (uiout, "vfork");
5345 if (!ptid_equal (b->forked_inferior_pid, null_ptid))
5347 ui_out_text (uiout, ", process ");
5348 ui_out_field_int (uiout, "what",
5349 ptid_get_pid (b->forked_inferior_pid));
5350 ui_out_spaces (uiout, 1);
5354 /* Implement the "print_mention" breakpoint_ops method for vfork
5358 print_mention_catch_vfork (struct breakpoint *b)
5360 printf_filtered (_("Catchpoint %d (vfork)"), b->number);
5363 /* The breakpoint_ops structure to be used in vfork catchpoints. */
5365 static struct breakpoint_ops catch_vfork_breakpoint_ops =
5369 breakpoint_hit_catch_vfork,
5370 print_it_catch_vfork,
5371 print_one_catch_vfork,
5372 print_mention_catch_vfork
5375 /* Implement the "insert" breakpoint_ops method for syscall
5379 insert_catch_syscall (struct breakpoint *b)
5381 struct inferior *inf = current_inferior ();
5383 ++inf->total_syscalls_count;
5384 if (!b->syscalls_to_be_caught)
5385 ++inf->any_syscall_count;
5390 VEC_iterate (int, b->syscalls_to_be_caught, i, iter);
5394 if (iter >= VEC_length (int, inf->syscalls_counts))
5396 int old_size = VEC_length (int, inf->syscalls_counts);
5397 uintptr_t vec_addr_offset = old_size * ((uintptr_t) sizeof (int));
5399 VEC_safe_grow (int, inf->syscalls_counts, iter + 1);
5400 vec_addr = (uintptr_t) VEC_address (int, inf->syscalls_counts) +
5402 memset ((void *) vec_addr, 0,
5403 (iter + 1 - old_size) * sizeof (int));
5405 elem = VEC_index (int, inf->syscalls_counts, iter);
5406 VEC_replace (int, inf->syscalls_counts, iter, ++elem);
5410 target_set_syscall_catchpoint (PIDGET (inferior_ptid),
5411 inf->total_syscalls_count != 0,
5412 inf->any_syscall_count,
5413 VEC_length (int, inf->syscalls_counts),
5414 VEC_address (int, inf->syscalls_counts));
5417 /* Implement the "remove" breakpoint_ops method for syscall
5421 remove_catch_syscall (struct breakpoint *b)
5423 struct inferior *inf = current_inferior ();
5425 --inf->total_syscalls_count;
5426 if (!b->syscalls_to_be_caught)
5427 --inf->any_syscall_count;
5432 VEC_iterate (int, b->syscalls_to_be_caught, i, iter);
5436 if (iter >= VEC_length (int, inf->syscalls_counts))
5437 /* Shouldn't happen. */
5439 elem = VEC_index (int, inf->syscalls_counts, iter);
5440 VEC_replace (int, inf->syscalls_counts, iter, --elem);
5444 return target_set_syscall_catchpoint (PIDGET (inferior_ptid),
5445 inf->total_syscalls_count != 0,
5446 inf->any_syscall_count,
5447 VEC_length (int, inf->syscalls_counts),
5448 VEC_address (int, inf->syscalls_counts));
5451 /* Implement the "breakpoint_hit" breakpoint_ops method for syscall
5455 breakpoint_hit_catch_syscall (struct breakpoint *b)
5457 /* We must check if we are catching specific syscalls in this breakpoint.
5458 If we are, then we must guarantee that the called syscall is the same
5459 syscall we are catching. */
5460 int syscall_number = 0;
5462 if (!inferior_has_called_syscall (inferior_ptid, &syscall_number))
5465 /* Now, checking if the syscall is the same. */
5466 if (b->syscalls_to_be_caught)
5470 VEC_iterate (int, b->syscalls_to_be_caught, i, iter);
5472 if (syscall_number == iter)
5482 /* Implement the "print_it" breakpoint_ops method for syscall
5485 static enum print_stop_action
5486 print_it_catch_syscall (struct breakpoint *b)
5488 /* These are needed because we want to know in which state a
5489 syscall is. It can be in the TARGET_WAITKIND_SYSCALL_ENTRY
5490 or TARGET_WAITKIND_SYSCALL_RETURN, and depending on it we
5491 must print "called syscall" or "returned from syscall". */
5493 struct target_waitstatus last;
5495 struct cleanup *old_chain;
5498 get_last_target_status (&ptid, &last);
5500 get_syscall_by_number (last.value.syscall_number, &s);
5502 annotate_catchpoint (b->number);
5505 syscall_id = xstrprintf ("%d", last.value.syscall_number);
5507 syscall_id = xstrprintf ("'%s'", s.name);
5509 old_chain = make_cleanup (xfree, syscall_id);
5511 if (last.kind == TARGET_WAITKIND_SYSCALL_ENTRY)
5512 printf_filtered (_("\nCatchpoint %d (call to syscall %s), "),
5513 b->number, syscall_id);
5514 else if (last.kind == TARGET_WAITKIND_SYSCALL_RETURN)
5515 printf_filtered (_("\nCatchpoint %d (returned from syscall %s), "),
5516 b->number, syscall_id);
5518 do_cleanups (old_chain);
5520 return PRINT_SRC_AND_LOC;
5523 /* Implement the "print_one" breakpoint_ops method for syscall
5527 print_one_catch_syscall (struct breakpoint *b,
5528 struct bp_location **last_loc)
5530 struct value_print_options opts;
5532 get_user_print_options (&opts);
5533 /* Field 4, the address, is omitted (which makes the columns
5534 not line up too nicely with the headers, but the effect
5535 is relatively readable). */
5536 if (opts.addressprint)
5537 ui_out_field_skip (uiout, "addr");
5540 if (b->syscalls_to_be_caught
5541 && VEC_length (int, b->syscalls_to_be_caught) > 1)
5542 ui_out_text (uiout, "syscalls \"");
5544 ui_out_text (uiout, "syscall \"");
5546 if (b->syscalls_to_be_caught)
5549 char *text = xstrprintf ("%s", "");
5551 VEC_iterate (int, b->syscalls_to_be_caught, i, iter);
5556 get_syscall_by_number (iter, &s);
5559 text = xstrprintf ("%s%s, ", text, s.name);
5561 text = xstrprintf ("%s%d, ", text, iter);
5563 /* We have to xfree the last 'text' (now stored at 'x')
5564 because xstrprintf dinamically allocates new space for it
5568 /* Remove the last comma. */
5569 text[strlen (text) - 2] = '\0';
5570 ui_out_field_string (uiout, "what", text);
5573 ui_out_field_string (uiout, "what", "<any syscall>");
5574 ui_out_text (uiout, "\" ");
5577 /* Implement the "print_mention" breakpoint_ops method for syscall
5581 print_mention_catch_syscall (struct breakpoint *b)
5583 if (b->syscalls_to_be_caught)
5587 if (VEC_length (int, b->syscalls_to_be_caught) > 1)
5588 printf_filtered (_("Catchpoint %d (syscalls"), b->number);
5590 printf_filtered (_("Catchpoint %d (syscall"), b->number);
5593 VEC_iterate (int, b->syscalls_to_be_caught, i, iter);
5597 get_syscall_by_number (iter, &s);
5600 printf_filtered (" '%s' [%d]", s.name, s.number);
5602 printf_filtered (" %d", s.number);
5604 printf_filtered (")");
5607 printf_filtered (_("Catchpoint %d (any syscall)"),
5611 /* The breakpoint_ops structure to be used in syscall catchpoints. */
5613 static struct breakpoint_ops catch_syscall_breakpoint_ops =
5615 insert_catch_syscall,
5616 remove_catch_syscall,
5617 breakpoint_hit_catch_syscall,
5618 print_it_catch_syscall,
5619 print_one_catch_syscall,
5620 print_mention_catch_syscall
5623 /* Returns non-zero if 'b' is a syscall catchpoint. */
5626 syscall_catchpoint_p (struct breakpoint *b)
5628 return (b->ops == &catch_syscall_breakpoint_ops);
5631 /* Create a new breakpoint of the bp_catchpoint kind and return it,
5632 but does NOT mention it nor update the global location list.
5633 This is useful if you need to fill more fields in the
5634 struct breakpoint before calling mention.
5636 If TEMPFLAG is non-zero, then make the breakpoint temporary.
5637 If COND_STRING is not NULL, then store it in the breakpoint.
5638 OPS, if not NULL, is the breakpoint_ops structure associated
5639 to the catchpoint. */
5641 static struct breakpoint *
5642 create_catchpoint_without_mention (struct gdbarch *gdbarch, int tempflag,
5644 struct breakpoint_ops *ops)
5646 struct symtab_and_line sal;
5647 struct breakpoint *b;
5650 sal.pspace = current_program_space;
5652 b = set_raw_breakpoint (gdbarch, sal, bp_catchpoint);
5653 set_breakpoint_count (breakpoint_count + 1);
5654 b->number = breakpoint_count;
5656 b->cond_string = (cond_string == NULL) ? NULL : xstrdup (cond_string);
5658 b->addr_string = NULL;
5659 b->enable_state = bp_enabled;
5660 b->disposition = tempflag ? disp_del : disp_donttouch;
5666 /* Create a new breakpoint of the bp_catchpoint kind and return it.
5668 If TEMPFLAG is non-zero, then make the breakpoint temporary.
5669 If COND_STRING is not NULL, then store it in the breakpoint.
5670 OPS, if not NULL, is the breakpoint_ops structure associated
5671 to the catchpoint. */
5673 static struct breakpoint *
5674 create_catchpoint (struct gdbarch *gdbarch, int tempflag,
5675 char *cond_string, struct breakpoint_ops *ops)
5677 struct breakpoint *b =
5678 create_catchpoint_without_mention (gdbarch, tempflag, cond_string, ops);
5681 update_global_location_list (1);
5687 create_fork_vfork_event_catchpoint (struct gdbarch *gdbarch,
5688 int tempflag, char *cond_string,
5689 struct breakpoint_ops *ops)
5691 struct breakpoint *b
5692 = create_catchpoint (gdbarch, tempflag, cond_string, ops);
5694 /* FIXME: We should put this information in a breakpoint private data
5696 b->forked_inferior_pid = null_ptid;
5699 /* Exec catchpoints. */
5702 insert_catch_exec (struct breakpoint *b)
5704 target_insert_exec_catchpoint (PIDGET (inferior_ptid));
5708 remove_catch_exec (struct breakpoint *b)
5710 return target_remove_exec_catchpoint (PIDGET (inferior_ptid));
5714 breakpoint_hit_catch_exec (struct breakpoint *b)
5716 return inferior_has_execd (inferior_ptid, &b->exec_pathname);
5719 static enum print_stop_action
5720 print_it_catch_exec (struct breakpoint *b)
5722 annotate_catchpoint (b->number);
5723 printf_filtered (_("\nCatchpoint %d (exec'd %s), "), b->number,
5725 return PRINT_SRC_AND_LOC;
5729 print_one_catch_exec (struct breakpoint *b, struct bp_location **last_loc)
5731 struct value_print_options opts;
5733 get_user_print_options (&opts);
5735 /* Field 4, the address, is omitted (which makes the columns
5736 not line up too nicely with the headers, but the effect
5737 is relatively readable). */
5738 if (opts.addressprint)
5739 ui_out_field_skip (uiout, "addr");
5741 ui_out_text (uiout, "exec");
5742 if (b->exec_pathname != NULL)
5744 ui_out_text (uiout, ", program \"");
5745 ui_out_field_string (uiout, "what", b->exec_pathname);
5746 ui_out_text (uiout, "\" ");
5751 print_mention_catch_exec (struct breakpoint *b)
5753 printf_filtered (_("Catchpoint %d (exec)"), b->number);
5756 static struct breakpoint_ops catch_exec_breakpoint_ops =
5760 breakpoint_hit_catch_exec,
5761 print_it_catch_exec,
5762 print_one_catch_exec,
5763 print_mention_catch_exec
5767 create_syscall_event_catchpoint (int tempflag, VEC(int) *filter,
5768 struct breakpoint_ops *ops)
5770 struct gdbarch *gdbarch = get_current_arch ();
5771 struct breakpoint *b =
5772 create_catchpoint_without_mention (gdbarch, tempflag, NULL, ops);
5774 b->syscalls_to_be_caught = filter;
5776 /* Now, we have to mention the breakpoint and update the global
5779 update_global_location_list (1);
5783 hw_breakpoint_used_count (void)
5785 struct breakpoint *b;
5790 if (b->type == bp_hardware_breakpoint && breakpoint_enabled (b))
5798 hw_watchpoint_used_count (enum bptype type, int *other_type_used)
5800 struct breakpoint *b;
5803 *other_type_used = 0;
5806 if (breakpoint_enabled (b))
5808 if (b->type == type)
5810 else if ((b->type == bp_hardware_watchpoint
5811 || b->type == bp_read_watchpoint
5812 || b->type == bp_access_watchpoint))
5813 *other_type_used = 1;
5820 disable_watchpoints_before_interactive_call_start (void)
5822 struct breakpoint *b;
5826 if (((b->type == bp_watchpoint)
5827 || (b->type == bp_hardware_watchpoint)
5828 || (b->type == bp_read_watchpoint)
5829 || (b->type == bp_access_watchpoint))
5830 && breakpoint_enabled (b))
5832 b->enable_state = bp_call_disabled;
5833 update_global_location_list (0);
5839 enable_watchpoints_after_interactive_call_stop (void)
5841 struct breakpoint *b;
5845 if (((b->type == bp_watchpoint)
5846 || (b->type == bp_hardware_watchpoint)
5847 || (b->type == bp_read_watchpoint)
5848 || (b->type == bp_access_watchpoint))
5849 && (b->enable_state == bp_call_disabled))
5851 b->enable_state = bp_enabled;
5852 update_global_location_list (1);
5858 disable_breakpoints_before_startup (void)
5860 struct breakpoint *b;
5865 if (b->pspace != current_program_space)
5868 if ((b->type == bp_breakpoint
5869 || b->type == bp_hardware_breakpoint)
5870 && breakpoint_enabled (b))
5872 b->enable_state = bp_startup_disabled;
5878 update_global_location_list (0);
5880 current_program_space->executing_startup = 1;
5884 enable_breakpoints_after_startup (void)
5886 struct breakpoint *b;
5889 current_program_space->executing_startup = 0;
5893 if (b->pspace != current_program_space)
5896 if ((b->type == bp_breakpoint
5897 || b->type == bp_hardware_breakpoint)
5898 && b->enable_state == bp_startup_disabled)
5900 b->enable_state = bp_enabled;
5906 breakpoint_re_set ();
5910 /* Set a breakpoint that will evaporate an end of command
5911 at address specified by SAL.
5912 Restrict it to frame FRAME if FRAME is nonzero. */
5915 set_momentary_breakpoint (struct gdbarch *gdbarch, struct symtab_and_line sal,
5916 struct frame_id frame_id, enum bptype type)
5918 struct breakpoint *b;
5920 /* If FRAME_ID is valid, it should be a real frame, not an inlined
5922 gdb_assert (!frame_id_inlined_p (frame_id));
5924 b = set_raw_breakpoint (gdbarch, sal, type);
5925 b->enable_state = bp_enabled;
5926 b->disposition = disp_donttouch;
5927 b->frame_id = frame_id;
5929 /* If we're debugging a multi-threaded program, then we
5930 want momentary breakpoints to be active in only a
5931 single thread of control. */
5932 if (in_thread_list (inferior_ptid))
5933 b->thread = pid_to_thread_id (inferior_ptid);
5935 update_global_location_list_nothrow (1);
5940 /* Make a deep copy of momentary breakpoint ORIG. Returns NULL if
5944 clone_momentary_breakpoint (struct breakpoint *orig)
5946 struct breakpoint *copy;
5948 /* If there's nothing to clone, then return nothing. */
5952 copy = set_raw_breakpoint_without_location (orig->gdbarch, orig->type);
5953 copy->loc = allocate_bp_location (copy);
5954 set_breakpoint_location_function (copy->loc);
5956 copy->loc->gdbarch = orig->loc->gdbarch;
5957 copy->loc->requested_address = orig->loc->requested_address;
5958 copy->loc->address = orig->loc->address;
5959 copy->loc->section = orig->loc->section;
5960 copy->loc->pspace = orig->loc->pspace;
5962 if (orig->source_file == NULL)
5963 copy->source_file = NULL;
5965 copy->source_file = xstrdup (orig->source_file);
5967 copy->line_number = orig->line_number;
5968 copy->frame_id = orig->frame_id;
5969 copy->thread = orig->thread;
5970 copy->pspace = orig->pspace;
5972 copy->enable_state = bp_enabled;
5973 copy->disposition = disp_donttouch;
5974 copy->number = internal_breakpoint_number--;
5976 update_global_location_list_nothrow (0);
5981 set_momentary_breakpoint_at_pc (struct gdbarch *gdbarch, CORE_ADDR pc,
5984 struct symtab_and_line sal;
5986 sal = find_pc_line (pc, 0);
5988 sal.section = find_pc_overlay (pc);
5989 sal.explicit_pc = 1;
5991 return set_momentary_breakpoint (gdbarch, sal, null_frame_id, type);
5995 /* Tell the user we have just set a breakpoint B. */
5998 mention (struct breakpoint *b)
6001 struct cleanup *ui_out_chain;
6002 struct value_print_options opts;
6004 get_user_print_options (&opts);
6006 /* FIXME: This is misplaced; mention() is called by things (like
6007 hitting a watchpoint) other than breakpoint creation. It should
6008 be possible to clean this up and at the same time replace the
6009 random calls to breakpoint_changed with this hook. */
6010 observer_notify_breakpoint_created (b->number);
6012 if (b->ops != NULL && b->ops->print_mention != NULL)
6013 b->ops->print_mention (b);
6018 printf_filtered (_("(apparently deleted?) Eventpoint %d: "), b->number);
6021 ui_out_text (uiout, "Watchpoint ");
6022 ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "wpt");
6023 ui_out_field_int (uiout, "number", b->number);
6024 ui_out_text (uiout, ": ");
6025 ui_out_field_string (uiout, "exp", b->exp_string);
6026 do_cleanups (ui_out_chain);
6028 case bp_hardware_watchpoint:
6029 ui_out_text (uiout, "Hardware watchpoint ");
6030 ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "wpt");
6031 ui_out_field_int (uiout, "number", b->number);
6032 ui_out_text (uiout, ": ");
6033 ui_out_field_string (uiout, "exp", b->exp_string);
6034 do_cleanups (ui_out_chain);
6036 case bp_read_watchpoint:
6037 ui_out_text (uiout, "Hardware read watchpoint ");
6038 ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "hw-rwpt");
6039 ui_out_field_int (uiout, "number", b->number);
6040 ui_out_text (uiout, ": ");
6041 ui_out_field_string (uiout, "exp", b->exp_string);
6042 do_cleanups (ui_out_chain);
6044 case bp_access_watchpoint:
6045 ui_out_text (uiout, "Hardware access (read/write) watchpoint ");
6046 ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "hw-awpt");
6047 ui_out_field_int (uiout, "number", b->number);
6048 ui_out_text (uiout, ": ");
6049 ui_out_field_string (uiout, "exp", b->exp_string);
6050 do_cleanups (ui_out_chain);
6053 if (ui_out_is_mi_like_p (uiout))
6058 if (b->disposition == disp_del)
6059 printf_filtered (_("Temporary breakpoint"));
6061 printf_filtered (_("Breakpoint"));
6062 printf_filtered (_(" %d"), b->number);
6065 case bp_hardware_breakpoint:
6066 if (ui_out_is_mi_like_p (uiout))
6071 printf_filtered (_("Hardware assisted breakpoint %d"), b->number);
6075 if (ui_out_is_mi_like_p (uiout))
6080 printf_filtered (_("Tracepoint"));
6081 printf_filtered (_(" %d"), b->number);
6088 case bp_longjmp_resume:
6089 case bp_step_resume:
6091 case bp_watchpoint_scope:
6092 case bp_shlib_event:
6093 case bp_thread_event:
6094 case bp_overlay_event:
6096 case bp_longjmp_master:
6102 /* i18n: cagney/2005-02-11: Below needs to be merged into a
6106 printf_filtered (_(" (%s) pending."), b->addr_string);
6110 if (opts.addressprint || b->source_file == NULL)
6112 printf_filtered (" at ");
6113 fputs_filtered (paddress (b->loc->gdbarch, b->loc->address),
6117 printf_filtered (": file %s, line %d.",
6118 b->source_file, b->line_number);
6122 struct bp_location *loc = b->loc;
6124 for (; loc; loc = loc->next)
6126 printf_filtered (" (%d locations)", n);
6131 if (ui_out_is_mi_like_p (uiout))
6133 printf_filtered ("\n");
6137 static struct bp_location *
6138 add_location_to_breakpoint (struct breakpoint *b,
6139 const struct symtab_and_line *sal)
6141 struct bp_location *loc, **tmp;
6143 loc = allocate_bp_location (b);
6144 for (tmp = &(b->loc); *tmp != NULL; tmp = &((*tmp)->next))
6147 loc->gdbarch = get_sal_arch (*sal);
6149 loc->gdbarch = b->gdbarch;
6150 loc->requested_address = sal->pc;
6151 loc->address = adjust_breakpoint_address (loc->gdbarch,
6152 loc->requested_address, b->type);
6153 loc->pspace = sal->pspace;
6154 gdb_assert (loc->pspace != NULL);
6155 loc->section = sal->section;
6157 set_breakpoint_location_function (loc);
6162 /* Return 1 if LOC is pointing to a permanent breakpoint,
6163 return 0 otherwise. */
6166 bp_loc_is_permanent (struct bp_location *loc)
6170 const gdb_byte *brk;
6171 gdb_byte *target_mem;
6172 struct cleanup *cleanup;
6175 gdb_assert (loc != NULL);
6177 addr = loc->address;
6178 brk = gdbarch_breakpoint_from_pc (loc->gdbarch, &addr, &len);
6180 /* Software breakpoints unsupported? */
6184 target_mem = alloca (len);
6186 /* Enable the automatic memory restoration from breakpoints while
6187 we read the memory. Otherwise we could say about our temporary
6188 breakpoints they are permanent. */
6189 cleanup = save_current_space_and_thread ();
6191 switch_to_program_space_and_thread (loc->pspace);
6192 make_show_memory_breakpoints_cleanup (0);
6194 if (target_read_memory (loc->address, target_mem, len) == 0
6195 && memcmp (target_mem, brk, len) == 0)
6198 do_cleanups (cleanup);
6205 /* Create a breakpoint with SAL as location. Use ADDR_STRING
6206 as textual description of the location, and COND_STRING
6207 as condition expression. */
6210 create_breakpoint (struct gdbarch *gdbarch,
6211 struct symtabs_and_lines sals, char *addr_string,
6213 enum bptype type, enum bpdisp disposition,
6214 int thread, int task, int ignore_count,
6215 struct breakpoint_ops *ops, int from_tty, int enabled)
6217 struct breakpoint *b = NULL;
6220 if (type == bp_hardware_breakpoint)
6222 int i = hw_breakpoint_used_count ();
6223 int target_resources_ok =
6224 target_can_use_hardware_watchpoint (bp_hardware_breakpoint,
6226 if (target_resources_ok == 0)
6227 error (_("No hardware breakpoint support in the target."));
6228 else if (target_resources_ok < 0)
6229 error (_("Hardware breakpoints used exceeds limit."));
6232 gdb_assert (sals.nelts > 0);
6234 for (i = 0; i < sals.nelts; ++i)
6236 struct symtab_and_line sal = sals.sals[i];
6237 struct bp_location *loc;
6241 struct gdbarch *loc_gdbarch = get_sal_arch (sal);
6243 loc_gdbarch = gdbarch;
6245 describe_other_breakpoints (loc_gdbarch,
6246 sal.pspace, sal.pc, sal.section, thread);
6251 b = set_raw_breakpoint (gdbarch, sal, type);
6252 set_breakpoint_count (breakpoint_count + 1);
6253 b->number = breakpoint_count;
6257 b->cond_string = cond_string;
6258 b->ignore_count = ignore_count;
6259 b->enable_state = enabled ? bp_enabled : bp_disabled;
6260 b->disposition = disposition;
6262 b->pspace = sals.sals[0].pspace;
6264 if (enabled && b->pspace->executing_startup
6265 && (b->type == bp_breakpoint
6266 || b->type == bp_hardware_breakpoint))
6267 b->enable_state = bp_startup_disabled;
6273 loc = add_location_to_breakpoint (b, &sal);
6276 if (bp_loc_is_permanent (loc))
6277 make_breakpoint_permanent (b);
6281 char *arg = b->cond_string;
6282 loc->cond = parse_exp_1 (&arg, block_for_pc (loc->address), 0);
6284 error (_("Garbage %s follows condition"), arg);
6289 b->addr_string = addr_string;
6291 /* addr_string has to be used or breakpoint_re_set will delete
6294 = xstrprintf ("*%s", paddress (b->loc->gdbarch, b->loc->address));
6300 /* Remove element at INDEX_TO_REMOVE from SAL, shifting other
6301 elements to fill the void space. */
6303 remove_sal (struct symtabs_and_lines *sal, int index_to_remove)
6305 int i = index_to_remove+1;
6306 int last_index = sal->nelts-1;
6308 for (;i <= last_index; ++i)
6309 sal->sals[i-1] = sal->sals[i];
6314 /* If appropriate, obtains all sals that correspond to the same file
6315 and line as SAL, in all program spaces. Users debugging with IDEs,
6316 will want to set a breakpoint at foo.c:line, and not really care
6317 about program spaces. This is done only if SAL does not have
6318 explicit PC and has line and file information. If we got just a
6319 single expanded sal, return the original.
6321 Otherwise, if SAL.explicit_line is not set, filter out all sals for
6322 which the name of enclosing function is different from SAL. This
6323 makes sure that if we have breakpoint originally set in template
6324 instantiation, say foo<int>(), we won't expand SAL to locations at
6325 the same line in all existing instantiations of 'foo'. */
6327 static struct symtabs_and_lines
6328 expand_line_sal_maybe (struct symtab_and_line sal)
6330 struct symtabs_and_lines expanded;
6331 CORE_ADDR original_pc = sal.pc;
6332 char *original_function = NULL;
6335 struct cleanup *old_chain;
6337 /* If we have explicit pc, don't expand.
6338 If we have no line number, we can't expand. */
6339 if (sal.explicit_pc || sal.line == 0 || sal.symtab == NULL)
6342 expanded.sals = xmalloc (sizeof (struct symtab_and_line));
6343 expanded.sals[0] = sal;
6349 old_chain = save_current_space_and_thread ();
6351 switch_to_program_space_and_thread (sal.pspace);
6353 find_pc_partial_function (original_pc, &original_function, NULL, NULL);
6355 /* Note that expand_line_sal visits *all* program spaces. */
6356 expanded = expand_line_sal (sal);
6358 if (expanded.nelts == 1)
6360 /* We had one sal, we got one sal. Return that sal, adjusting it
6361 past the function prologue if necessary. */
6362 xfree (expanded.sals);
6364 expanded.sals = xmalloc (sizeof (struct symtab_and_line));
6365 sal.pc = original_pc;
6366 expanded.sals[0] = sal;
6367 skip_prologue_sal (&expanded.sals[0]);
6368 do_cleanups (old_chain);
6372 if (!sal.explicit_line)
6374 CORE_ADDR func_addr, func_end;
6375 for (i = 0; i < expanded.nelts; ++i)
6377 CORE_ADDR pc = expanded.sals[i].pc;
6378 char *this_function;
6380 /* We need to switch threads as well since we're about to
6382 switch_to_program_space_and_thread (expanded.sals[i].pspace);
6384 if (find_pc_partial_function (pc, &this_function,
6385 &func_addr, &func_end))
6388 && strcmp (this_function, original_function) != 0)
6390 remove_sal (&expanded, i);
6393 else if (func_addr == pc)
6395 /* We're at beginning of a function, and should
6397 struct symbol *sym = find_pc_function (pc);
6399 expanded.sals[i] = find_function_start_sal (sym, 1);
6402 /* Since find_pc_partial_function returned true,
6403 we should really always find the section here. */
6404 struct obj_section *section = find_pc_section (pc);
6407 struct gdbarch *gdbarch
6408 = get_objfile_arch (section->objfile);
6410 = gdbarch_skip_prologue (gdbarch, pc);
6419 for (i = 0; i < expanded.nelts; ++i)
6421 /* If this SAL corresponds to a breakpoint inserted using a
6422 line number, then skip the function prologue if necessary. */
6423 skip_prologue_sal (&expanded.sals[i]);
6427 do_cleanups (old_chain);
6429 if (expanded.nelts <= 1)
6431 /* This is un ugly workaround. If we get zero
6432 expanded sals then something is really wrong.
6433 Fix that by returnign the original sal. */
6434 xfree (expanded.sals);
6436 expanded.sals = xmalloc (sizeof (struct symtab_and_line));
6437 sal.pc = original_pc;
6438 expanded.sals[0] = sal;
6445 for (i = 0; i < expanded.nelts; ++i)
6446 if (expanded.sals[i].pc == original_pc)
6457 /* Add SALS.nelts breakpoints to the breakpoint table. For each
6458 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i]
6459 value. COND_STRING, if not NULL, specified the condition to be
6460 used for all breakpoints. Essentially the only case where
6461 SALS.nelts is not 1 is when we set a breakpoint on an overloaded
6462 function. In that case, it's still not possible to specify
6463 separate conditions for different overloaded functions, so
6464 we take just a single condition string.
6466 NOTE: If the function succeeds, the caller is expected to cleanup
6467 the arrays ADDR_STRING, COND_STRING, and SALS (but not the
6468 array contents). If the function fails (error() is called), the
6469 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
6470 COND and SALS arrays and each of those arrays contents. */
6473 create_breakpoints (struct gdbarch *gdbarch,
6474 struct symtabs_and_lines sals, char **addr_string,
6476 enum bptype type, enum bpdisp disposition,
6477 int thread, int task, int ignore_count,
6478 struct breakpoint_ops *ops, int from_tty,
6482 for (i = 0; i < sals.nelts; ++i)
6484 struct symtabs_and_lines expanded =
6485 expand_line_sal_maybe (sals.sals[i]);
6487 create_breakpoint (gdbarch, expanded, addr_string[i],
6488 cond_string, type, disposition,
6489 thread, task, ignore_count, ops, from_tty, enabled);
6493 /* Parse ARG which is assumed to be a SAL specification possibly
6494 followed by conditionals. On return, SALS contains an array of SAL
6495 addresses found. ADDR_STRING contains a vector of (canonical)
6496 address strings. ARG points to the end of the SAL. */
6499 parse_breakpoint_sals (char **address,
6500 struct symtabs_and_lines *sals,
6501 char ***addr_string,
6504 char *addr_start = *address;
6505 *addr_string = NULL;
6506 /* If no arg given, or if first arg is 'if ', use the default
6508 if ((*address) == NULL
6509 || (strncmp ((*address), "if", 2) == 0 && isspace ((*address)[2])))
6511 if (default_breakpoint_valid)
6513 struct symtab_and_line sal;
6514 init_sal (&sal); /* initialize to zeroes */
6515 sals->sals = (struct symtab_and_line *)
6516 xmalloc (sizeof (struct symtab_and_line));
6517 sal.pc = default_breakpoint_address;
6518 sal.line = default_breakpoint_line;
6519 sal.symtab = default_breakpoint_symtab;
6520 sal.pspace = default_breakpoint_pspace;
6521 sal.section = find_pc_overlay (sal.pc);
6523 /* "break" without arguments is equivalent to "break *PC" where PC is
6524 the default_breakpoint_address. So make sure to set
6525 sal.explicit_pc to prevent GDB from trying to expand the list of
6526 sals to include all other instances with the same symtab and line.
6528 sal.explicit_pc = 1;
6530 sals->sals[0] = sal;
6534 error (_("No default breakpoint address now."));
6538 /* Force almost all breakpoints to be in terms of the
6539 current_source_symtab (which is decode_line_1's default). This
6540 should produce the results we want almost all of the time while
6541 leaving default_breakpoint_* alone.
6542 ObjC: However, don't match an Objective-C method name which
6543 may have a '+' or '-' succeeded by a '[' */
6545 struct symtab_and_line cursal = get_current_source_symtab_and_line ();
6547 if (default_breakpoint_valid
6549 || ((strchr ("+-", (*address)[0]) != NULL)
6550 && ((*address)[1] != '['))))
6551 *sals = decode_line_1 (address, 1, default_breakpoint_symtab,
6552 default_breakpoint_line, addr_string,
6555 *sals = decode_line_1 (address, 1, (struct symtab *) NULL, 0,
6556 addr_string, not_found_ptr);
6558 /* For any SAL that didn't have a canonical string, fill one in. */
6559 if (sals->nelts > 0 && *addr_string == NULL)
6560 *addr_string = xcalloc (sals->nelts, sizeof (char **));
6561 if (addr_start != (*address))
6564 for (i = 0; i < sals->nelts; i++)
6566 /* Add the string if not present. */
6567 if ((*addr_string)[i] == NULL)
6568 (*addr_string)[i] = savestring (addr_start, (*address) - addr_start);
6574 /* Convert each SAL into a real PC. Verify that the PC can be
6575 inserted as a breakpoint. If it can't throw an error. */
6578 breakpoint_sals_to_pc (struct symtabs_and_lines *sals,
6582 for (i = 0; i < sals->nelts; i++)
6583 resolve_sal_pc (&sals->sals[i]);
6587 do_captured_parse_breakpoint (struct ui_out *ui, void *data)
6589 struct captured_parse_breakpoint_args *args = data;
6591 parse_breakpoint_sals (args->arg_p, args->sals_p, args->addr_string_p,
6592 args->not_found_ptr);
6595 /* Given TOK, a string specification of condition and thread, as
6596 accepted by the 'break' command, extract the condition
6597 string and thread number and set *COND_STRING and *THREAD.
6598 PC identifies the context at which the condition should be parsed.
6599 If no condition is found, *COND_STRING is set to NULL.
6600 If no thread is found, *THREAD is set to -1. */
6602 find_condition_and_thread (char *tok, CORE_ADDR pc,
6603 char **cond_string, int *thread, int *task)
6605 *cond_string = NULL;
6611 char *cond_start = NULL;
6612 char *cond_end = NULL;
6613 while (*tok == ' ' || *tok == '\t')
6618 while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
6621 toklen = end_tok - tok;
6623 if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
6625 struct expression *expr;
6627 tok = cond_start = end_tok + 1;
6628 expr = parse_exp_1 (&tok, block_for_pc (pc), 0);
6631 *cond_string = savestring (cond_start,
6632 cond_end - cond_start);
6634 else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0)
6640 *thread = strtol (tok, &tok, 0);
6642 error (_("Junk after thread keyword."));
6643 if (!valid_thread_id (*thread))
6644 error (_("Unknown thread %d."), *thread);
6646 else if (toklen >= 1 && strncmp (tok, "task", toklen) == 0)
6652 *task = strtol (tok, &tok, 0);
6654 error (_("Junk after task keyword."));
6655 if (!valid_task_id (*task))
6656 error (_("Unknown task %d."), *task);
6659 error (_("Junk at end of arguments."));
6663 /* Set a breakpoint. This function is shared between
6664 CLI and MI functions for setting a breakpoint.
6665 This function has two major modes of operations,
6666 selected by the PARSE_CONDITION_AND_THREAD parameter.
6667 If non-zero, the function will parse arg, extracting
6668 breakpoint location, address and thread. Otherwise,
6669 ARG is just the location of breakpoint, with condition
6670 and thread specified by the COND_STRING and THREAD
6674 break_command_really (struct gdbarch *gdbarch,
6675 char *arg, char *cond_string, int thread,
6676 int parse_condition_and_thread,
6677 int tempflag, int hardwareflag, int traceflag,
6679 enum auto_boolean pending_break_support,
6680 struct breakpoint_ops *ops,
6684 struct gdb_exception e;
6685 struct symtabs_and_lines sals;
6686 struct symtab_and_line pending_sal;
6689 char *addr_start = arg;
6691 struct cleanup *old_chain;
6692 struct cleanup *bkpt_chain = NULL;
6693 struct captured_parse_breakpoint_args parse_args;
6697 enum bptype type_wanted;
6704 parse_args.arg_p = &arg;
6705 parse_args.sals_p = &sals;
6706 parse_args.addr_string_p = &addr_string;
6707 parse_args.not_found_ptr = ¬_found;
6709 e = catch_exception (uiout, do_captured_parse_breakpoint,
6710 &parse_args, RETURN_MASK_ALL);
6712 /* If caller is interested in rc value from parse, set value. */
6716 throw_exception (e);
6720 case NOT_FOUND_ERROR:
6722 /* If pending breakpoint support is turned off, throw
6725 if (pending_break_support == AUTO_BOOLEAN_FALSE)
6726 throw_exception (e);
6728 exception_print (gdb_stderr, e);
6730 /* If pending breakpoint support is auto query and the user
6731 selects no, then simply return the error code. */
6732 if (pending_break_support == AUTO_BOOLEAN_AUTO
6733 && !nquery ("Make breakpoint pending on future shared library load? "))
6736 /* At this point, either the user was queried about setting
6737 a pending breakpoint and selected yes, or pending
6738 breakpoint behavior is on and thus a pending breakpoint
6739 is defaulted on behalf of the user. */
6740 copy_arg = xstrdup (addr_start);
6741 addr_string = ©_arg;
6743 sals.sals = &pending_sal;
6748 throw_exception (e);
6755 /* Create a chain of things that always need to be cleaned up. */
6756 old_chain = make_cleanup (null_cleanup, 0);
6760 /* Make sure that all storage allocated to SALS gets freed. */
6761 make_cleanup (xfree, sals.sals);
6763 /* Cleanup the addr_string array but not its contents. */
6764 make_cleanup (xfree, addr_string);
6767 /* ----------------------------- SNIP -----------------------------
6768 Anything added to the cleanup chain beyond this point is assumed
6769 to be part of a breakpoint. If the breakpoint create succeeds
6770 then the memory is not reclaimed. */
6771 bkpt_chain = make_cleanup (null_cleanup, 0);
6773 /* Mark the contents of the addr_string for cleanup. These go on
6774 the bkpt_chain and only occur if the breakpoint create fails. */
6775 for (i = 0; i < sals.nelts; i++)
6777 if (addr_string[i] != NULL)
6778 make_cleanup (xfree, addr_string[i]);
6781 /* Resolve all line numbers to PC's and verify that the addresses
6782 are ok for the target. */
6784 breakpoint_sals_to_pc (&sals, addr_start);
6786 type_wanted = (traceflag
6788 : (hardwareflag ? bp_hardware_breakpoint : bp_breakpoint));
6790 /* Verify that condition can be parsed, before setting any
6791 breakpoints. Allocate a separate condition expression for each
6795 if (parse_condition_and_thread)
6797 /* Here we only parse 'arg' to separate condition
6798 from thread number, so parsing in context of first
6799 sal is OK. When setting the breakpoint we'll
6800 re-parse it in context of each sal. */
6803 find_condition_and_thread (arg, sals.sals[0].pc, &cond_string,
6806 make_cleanup (xfree, cond_string);
6810 /* Create a private copy of condition string. */
6813 cond_string = xstrdup (cond_string);
6814 make_cleanup (xfree, cond_string);
6817 create_breakpoints (gdbarch, sals, addr_string, cond_string, type_wanted,
6818 tempflag ? disp_del : disp_donttouch,
6819 thread, task, ignore_count, ops, from_tty, enabled);
6823 struct symtab_and_line sal = {0};
6824 struct breakpoint *b;
6826 make_cleanup (xfree, copy_arg);
6828 b = set_raw_breakpoint_without_location (gdbarch, type_wanted);
6829 set_breakpoint_count (breakpoint_count + 1);
6830 b->number = breakpoint_count;
6832 b->addr_string = addr_string[0];
6833 b->cond_string = NULL;
6834 b->ignore_count = ignore_count;
6835 b->disposition = tempflag ? disp_del : disp_donttouch;
6836 b->condition_not_parsed = 1;
6838 b->enable_state = enabled ? bp_enabled : bp_disabled;
6839 b->pspace = current_program_space;
6841 if (enabled && b->pspace->executing_startup
6842 && (b->type == bp_breakpoint
6843 || b->type == bp_hardware_breakpoint))
6844 b->enable_state = bp_startup_disabled;
6850 warning (_("Multiple breakpoints were set.\n"
6851 "Use the \"delete\" command to delete unwanted breakpoints."));
6852 /* That's it. Discard the cleanups for data inserted into the
6854 discard_cleanups (bkpt_chain);
6855 /* But cleanup everything else. */
6856 do_cleanups (old_chain);
6858 /* error call may happen here - have BKPT_CHAIN already discarded. */
6859 update_global_location_list (1);
6862 /* Set a breakpoint.
6863 ARG is a string describing breakpoint address,
6864 condition, and thread.
6865 FLAG specifies if a breakpoint is hardware on,
6866 and if breakpoint is temporary, using BP_HARDWARE_FLAG
6870 break_command_1 (char *arg, int flag, int from_tty)
6872 int hardwareflag = flag & BP_HARDWAREFLAG;
6873 int tempflag = flag & BP_TEMPFLAG;
6875 break_command_really (get_current_arch (),
6877 NULL, 0, 1 /* parse arg */,
6878 tempflag, hardwareflag, 0 /* traceflag */,
6879 0 /* Ignore count */,
6880 pending_break_support,
6881 NULL /* breakpoint_ops */,
6888 set_breakpoint (struct gdbarch *gdbarch,
6889 char *address, char *condition,
6890 int hardwareflag, int tempflag,
6891 int thread, int ignore_count,
6892 int pending, int enabled)
6894 break_command_really (gdbarch,
6895 address, condition, thread,
6896 0 /* condition and thread are valid. */,
6897 tempflag, hardwareflag, 0 /* traceflag */,
6900 ? AUTO_BOOLEAN_TRUE : AUTO_BOOLEAN_FALSE,
6904 /* Adjust SAL to the first instruction past the function prologue.
6905 The end of the prologue is determined using the line table from
6906 the debugging information. explicit_pc and explicit_line are
6909 If SAL is already past the prologue, then do nothing. */
6912 skip_prologue_sal (struct symtab_and_line *sal)
6915 struct symtab_and_line start_sal;
6916 struct cleanup *old_chain;
6918 old_chain = save_current_space_and_thread ();
6920 sym = find_pc_function (sal->pc);
6923 start_sal = find_function_start_sal (sym, 1);
6924 if (sal->pc < start_sal.pc)
6926 start_sal.explicit_line = sal->explicit_line;
6927 start_sal.explicit_pc = sal->explicit_pc;
6932 do_cleanups (old_chain);
6935 /* Helper function for break_command_1 and disassemble_command. */
6938 resolve_sal_pc (struct symtab_and_line *sal)
6942 if (sal->pc == 0 && sal->symtab != NULL)
6944 if (!find_line_pc (sal->symtab, sal->line, &pc))
6945 error (_("No line %d in file \"%s\"."),
6946 sal->line, sal->symtab->filename);
6949 /* If this SAL corresponds to a breakpoint inserted using
6950 a line number, then skip the function prologue if necessary. */
6951 if (sal->explicit_line)
6953 /* Preserve the original line number. */
6954 int saved_line = sal->line;
6955 skip_prologue_sal (sal);
6956 sal->line = saved_line;
6960 if (sal->section == 0 && sal->symtab != NULL)
6962 struct blockvector *bv;
6966 bv = blockvector_for_pc_sect (sal->pc, 0, &b, sal->symtab);
6969 sym = block_linkage_function (b);
6972 fixup_symbol_section (sym, sal->symtab->objfile);
6973 sal->section = SYMBOL_OBJ_SECTION (sym);
6977 /* It really is worthwhile to have the section, so we'll just
6978 have to look harder. This case can be executed if we have
6979 line numbers but no functions (as can happen in assembly
6982 struct minimal_symbol *msym;
6983 struct cleanup *old_chain = save_current_space_and_thread ();
6985 switch_to_program_space_and_thread (sal->pspace);
6987 msym = lookup_minimal_symbol_by_pc (sal->pc);
6989 sal->section = SYMBOL_OBJ_SECTION (msym);
6991 do_cleanups (old_chain);
6998 break_command (char *arg, int from_tty)
7000 break_command_1 (arg, 0, from_tty);
7004 tbreak_command (char *arg, int from_tty)
7006 break_command_1 (arg, BP_TEMPFLAG, from_tty);
7010 hbreak_command (char *arg, int from_tty)
7012 break_command_1 (arg, BP_HARDWAREFLAG, from_tty);
7016 thbreak_command (char *arg, int from_tty)
7018 break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty);
7022 stop_command (char *arg, int from_tty)
7024 printf_filtered (_("Specify the type of breakpoint to set.\n\
7025 Usage: stop in <function | address>\n\
7026 stop at <line>\n"));
7030 stopin_command (char *arg, int from_tty)
7034 if (arg == (char *) NULL)
7036 else if (*arg != '*')
7041 /* look for a ':'. If this is a line number specification, then
7042 say it is bad, otherwise, it should be an address or
7043 function/method name */
7044 while (*argptr && !hasColon)
7046 hasColon = (*argptr == ':');
7051 badInput = (*argptr != ':'); /* Not a class::method */
7053 badInput = isdigit (*arg); /* a simple line number */
7057 printf_filtered (_("Usage: stop in <function | address>\n"));
7059 break_command_1 (arg, 0, from_tty);
7063 stopat_command (char *arg, int from_tty)
7067 if (arg == (char *) NULL || *arg == '*') /* no line number */
7074 /* look for a ':'. If there is a '::' then get out, otherwise
7075 it is probably a line number. */
7076 while (*argptr && !hasColon)
7078 hasColon = (*argptr == ':');
7083 badInput = (*argptr == ':'); /* we have class::method */
7085 badInput = !isdigit (*arg); /* not a line number */
7089 printf_filtered (_("Usage: stop at <line>\n"));
7091 break_command_1 (arg, 0, from_tty);
7094 /* accessflag: hw_write: watch write,
7095 hw_read: watch read,
7096 hw_access: watch access (read or write) */
7098 watch_command_1 (char *arg, int accessflag, int from_tty)
7100 struct gdbarch *gdbarch = get_current_arch ();
7101 struct breakpoint *b, *scope_breakpoint = NULL;
7102 struct expression *exp;
7103 struct block *exp_valid_block;
7104 struct value *val, *mark;
7105 struct frame_info *frame;
7106 char *exp_start = NULL;
7107 char *exp_end = NULL;
7108 char *tok, *id_tok_start, *end_tok;
7110 char *cond_start = NULL;
7111 char *cond_end = NULL;
7112 int i, other_type_used, target_resources_ok = 0;
7113 enum bptype bp_type;
7117 /* Make sure that we actually have parameters to parse. */
7118 if (arg != NULL && arg[0] != '\0')
7120 toklen = strlen (arg); /* Size of argument list. */
7122 /* Points tok to the end of the argument list. */
7123 tok = arg + toklen - 1;
7125 /* Go backwards in the parameters list. Skip the last parameter.
7126 If we're expecting a 'thread <thread_num>' parameter, this should
7127 be the thread identifier. */
7128 while (tok > arg && (*tok == ' ' || *tok == '\t'))
7130 while (tok > arg && (*tok != ' ' && *tok != '\t'))
7133 /* Points end_tok to the beginning of the last token. */
7134 id_tok_start = tok + 1;
7136 /* Go backwards in the parameters list. Skip one more parameter.
7137 If we're expecting a 'thread <thread_num>' parameter, we should
7138 reach a "thread" token. */
7139 while (tok > arg && (*tok == ' ' || *tok == '\t'))
7144 while (tok > arg && (*tok != ' ' && *tok != '\t'))
7147 /* Move the pointer forward to skip the whitespace and
7148 calculate the length of the token. */
7150 toklen = end_tok - tok;
7152 if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0)
7154 /* At this point we've found a "thread" token, which means
7155 the user is trying to set a watchpoint that triggers
7156 only in a specific thread. */
7159 /* Extract the thread ID from the next token. */
7160 thread = strtol (id_tok_start, &endp, 0);
7162 /* Check if the user provided a valid numeric value for the
7164 if (*endp != ' ' && *endp != '\t' && *endp != '\0')
7165 error (_("Invalid thread ID specification %s."), id_tok_start);
7167 /* Check if the thread actually exists. */
7168 if (!valid_thread_id (thread))
7169 error (_("Unknown thread %d."), thread);
7171 /* Truncate the string and get rid of the thread <thread_num>
7172 parameter before the parameter list is parsed by the
7173 evaluate_expression() function. */
7178 /* Parse the rest of the arguments. */
7179 innermost_block = NULL;
7181 exp = parse_exp_1 (&arg, 0, 0);
7183 /* Remove trailing whitespace from the expression before saving it.
7184 This makes the eventual display of the expression string a bit
7186 while (exp_end > exp_start && (exp_end[-1] == ' ' || exp_end[-1] == '\t'))
7189 exp_valid_block = innermost_block;
7190 mark = value_mark ();
7191 fetch_watchpoint_value (exp, &val, NULL, NULL);
7193 release_value (val);
7196 while (*tok == ' ' || *tok == '\t')
7200 while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
7203 toklen = end_tok - tok;
7204 if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
7206 struct expression *cond;
7208 tok = cond_start = end_tok + 1;
7209 cond = parse_exp_1 (&tok, 0, 0);
7214 error (_("Junk at end of command."));
7216 if (accessflag == hw_read)
7217 bp_type = bp_read_watchpoint;
7218 else if (accessflag == hw_access)
7219 bp_type = bp_access_watchpoint;
7221 bp_type = bp_hardware_watchpoint;
7223 mem_cnt = can_use_hardware_watchpoint (val);
7224 if (mem_cnt == 0 && bp_type != bp_hardware_watchpoint)
7225 error (_("Expression cannot be implemented with read/access watchpoint."));
7228 i = hw_watchpoint_used_count (bp_type, &other_type_used);
7229 target_resources_ok =
7230 target_can_use_hardware_watchpoint (bp_type, i + mem_cnt,
7232 if (target_resources_ok == 0 && bp_type != bp_hardware_watchpoint)
7233 error (_("Target does not support this type of hardware watchpoint."));
7235 if (target_resources_ok < 0 && bp_type != bp_hardware_watchpoint)
7236 error (_("Target can only support one kind of HW watchpoint at a time."));
7239 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
7240 watchpoint could not be set. */
7241 if (!mem_cnt || target_resources_ok <= 0)
7242 bp_type = bp_watchpoint;
7244 frame = block_innermost_frame (exp_valid_block);
7246 /* If the expression is "local", then set up a "watchpoint scope"
7247 breakpoint at the point where we've left the scope of the watchpoint
7248 expression. Create the scope breakpoint before the watchpoint, so
7249 that we will encounter it first in bpstat_stop_status. */
7250 if (innermost_block && frame)
7252 if (frame_id_p (frame_unwind_caller_id (frame)))
7255 = create_internal_breakpoint (frame_unwind_caller_arch (frame),
7256 frame_unwind_caller_pc (frame),
7257 bp_watchpoint_scope);
7259 scope_breakpoint->enable_state = bp_enabled;
7261 /* Automatically delete the breakpoint when it hits. */
7262 scope_breakpoint->disposition = disp_del;
7264 /* Only break in the proper frame (help with recursion). */
7265 scope_breakpoint->frame_id = frame_unwind_caller_id (frame);
7267 /* Set the address at which we will stop. */
7268 scope_breakpoint->loc->gdbarch
7269 = frame_unwind_caller_arch (frame);
7270 scope_breakpoint->loc->requested_address
7271 = frame_unwind_caller_pc (frame);
7272 scope_breakpoint->loc->address
7273 = adjust_breakpoint_address (scope_breakpoint->loc->gdbarch,
7274 scope_breakpoint->loc->requested_address,
7275 scope_breakpoint->type);
7279 /* Now set up the breakpoint. */
7280 b = set_raw_breakpoint_without_location (NULL, bp_type);
7281 set_breakpoint_count (breakpoint_count + 1);
7282 b->number = breakpoint_count;
7284 b->disposition = disp_donttouch;
7286 b->exp_valid_block = exp_valid_block;
7287 b->exp_string = savestring (exp_start, exp_end - exp_start);
7291 b->cond_string = savestring (cond_start, cond_end - cond_start);
7297 b->watchpoint_frame = get_frame_id (frame);
7298 b->watchpoint_thread = inferior_ptid;
7302 b->watchpoint_frame = null_frame_id;
7303 b->watchpoint_thread = null_ptid;
7306 if (scope_breakpoint != NULL)
7308 /* The scope breakpoint is related to the watchpoint. We will
7309 need to act on them together. */
7310 b->related_breakpoint = scope_breakpoint;
7311 scope_breakpoint->related_breakpoint = b;
7314 value_free_to_mark (mark);
7316 /* Finally update the new watchpoint. This creates the locations
7317 that should be inserted. */
7318 update_watchpoint (b, 1);
7321 update_global_location_list (1);
7324 /* Return count of locations need to be watched and can be handled
7325 in hardware. If the watchpoint can not be handled
7326 in hardware return zero. */
7329 can_use_hardware_watchpoint (struct value *v)
7331 int found_memory_cnt = 0;
7332 struct value *head = v;
7334 /* Did the user specifically forbid us to use hardware watchpoints? */
7335 if (!can_use_hw_watchpoints)
7338 /* Make sure that the value of the expression depends only upon
7339 memory contents, and values computed from them within GDB. If we
7340 find any register references or function calls, we can't use a
7341 hardware watchpoint.
7343 The idea here is that evaluating an expression generates a series
7344 of values, one holding the value of every subexpression. (The
7345 expression a*b+c has five subexpressions: a, b, a*b, c, and
7346 a*b+c.) GDB's values hold almost enough information to establish
7347 the criteria given above --- they identify memory lvalues,
7348 register lvalues, computed values, etcetera. So we can evaluate
7349 the expression, and then scan the chain of values that leaves
7350 behind to decide whether we can detect any possible change to the
7351 expression's final value using only hardware watchpoints.
7353 However, I don't think that the values returned by inferior
7354 function calls are special in any way. So this function may not
7355 notice that an expression involving an inferior function call
7356 can't be watched with hardware watchpoints. FIXME. */
7357 for (; v; v = value_next (v))
7359 if (VALUE_LVAL (v) == lval_memory)
7362 /* A lazy memory lvalue is one that GDB never needed to fetch;
7363 we either just used its address (e.g., `a' in `a.b') or
7364 we never needed it at all (e.g., `a' in `a,b'). */
7368 /* Ahh, memory we actually used! Check if we can cover
7369 it with hardware watchpoints. */
7370 struct type *vtype = check_typedef (value_type (v));
7372 /* We only watch structs and arrays if user asked for it
7373 explicitly, never if they just happen to appear in a
7374 middle of some value chain. */
7376 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
7377 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
7379 CORE_ADDR vaddr = value_address (v);
7380 int len = TYPE_LENGTH (value_type (v));
7382 if (!target_region_ok_for_hw_watchpoint (vaddr, len))
7389 else if (VALUE_LVAL (v) != not_lval
7390 && deprecated_value_modifiable (v) == 0)
7391 return 0; /* ??? What does this represent? */
7392 else if (VALUE_LVAL (v) == lval_register)
7393 return 0; /* cannot watch a register with a HW watchpoint */
7396 /* The expression itself looks suitable for using a hardware
7397 watchpoint, but give the target machine a chance to reject it. */
7398 return found_memory_cnt;
7402 watch_command_wrapper (char *arg, int from_tty)
7404 watch_command (arg, from_tty);
7408 watch_command (char *arg, int from_tty)
7410 watch_command_1 (arg, hw_write, from_tty);
7414 rwatch_command_wrapper (char *arg, int from_tty)
7416 rwatch_command (arg, from_tty);
7420 rwatch_command (char *arg, int from_tty)
7422 watch_command_1 (arg, hw_read, from_tty);
7426 awatch_command_wrapper (char *arg, int from_tty)
7428 awatch_command (arg, from_tty);
7432 awatch_command (char *arg, int from_tty)
7434 watch_command_1 (arg, hw_access, from_tty);
7438 /* Helper routines for the until_command routine in infcmd.c. Here
7439 because it uses the mechanisms of breakpoints. */
7441 struct until_break_command_continuation_args
7443 struct breakpoint *breakpoint;
7444 struct breakpoint *breakpoint2;
7447 /* This function is called by fetch_inferior_event via the
7448 cmd_continuation pointer, to complete the until command. It takes
7449 care of cleaning up the temporary breakpoints set up by the until
7452 until_break_command_continuation (void *arg)
7454 struct until_break_command_continuation_args *a = arg;
7456 delete_breakpoint (a->breakpoint);
7458 delete_breakpoint (a->breakpoint2);
7462 until_break_command (char *arg, int from_tty, int anywhere)
7464 struct symtabs_and_lines sals;
7465 struct symtab_and_line sal;
7466 struct frame_info *frame = get_selected_frame (NULL);
7467 struct breakpoint *breakpoint;
7468 struct breakpoint *breakpoint2 = NULL;
7469 struct cleanup *old_chain;
7471 clear_proceed_status ();
7473 /* Set a breakpoint where the user wants it and at return from
7476 if (default_breakpoint_valid)
7477 sals = decode_line_1 (&arg, 1, default_breakpoint_symtab,
7478 default_breakpoint_line, (char ***) NULL, NULL);
7480 sals = decode_line_1 (&arg, 1, (struct symtab *) NULL,
7481 0, (char ***) NULL, NULL);
7483 if (sals.nelts != 1)
7484 error (_("Couldn't get information on specified line."));
7487 xfree (sals.sals); /* malloc'd, so freed */
7490 error (_("Junk at end of arguments."));
7492 resolve_sal_pc (&sal);
7495 /* If the user told us to continue until a specified location,
7496 we don't specify a frame at which we need to stop. */
7497 breakpoint = set_momentary_breakpoint (get_frame_arch (frame), sal,
7498 null_frame_id, bp_until);
7500 /* Otherwise, specify the selected frame, because we want to stop only
7501 at the very same frame. */
7502 breakpoint = set_momentary_breakpoint (get_frame_arch (frame), sal,
7503 get_stack_frame_id (frame),
7506 old_chain = make_cleanup_delete_breakpoint (breakpoint);
7508 /* Keep within the current frame, or in frames called by the current
7511 if (frame_id_p (frame_unwind_caller_id (frame)))
7513 sal = find_pc_line (frame_unwind_caller_pc (frame), 0);
7514 sal.pc = frame_unwind_caller_pc (frame);
7515 breakpoint2 = set_momentary_breakpoint (frame_unwind_caller_arch (frame),
7517 frame_unwind_caller_id (frame),
7519 make_cleanup_delete_breakpoint (breakpoint2);
7522 proceed (-1, TARGET_SIGNAL_DEFAULT, 0);
7524 /* If we are running asynchronously, and proceed call above has actually
7525 managed to start the target, arrange for breakpoints to be
7526 deleted when the target stops. Otherwise, we're already stopped and
7527 delete breakpoints via cleanup chain. */
7529 if (target_can_async_p () && is_running (inferior_ptid))
7531 struct until_break_command_continuation_args *args;
7532 args = xmalloc (sizeof (*args));
7534 args->breakpoint = breakpoint;
7535 args->breakpoint2 = breakpoint2;
7537 discard_cleanups (old_chain);
7538 add_continuation (inferior_thread (),
7539 until_break_command_continuation, args,
7543 do_cleanups (old_chain);
7547 ep_skip_leading_whitespace (char **s)
7549 if ((s == NULL) || (*s == NULL))
7551 while (isspace (**s))
7555 /* This function attempts to parse an optional "if <cond>" clause
7556 from the arg string. If one is not found, it returns NULL.
7558 Else, it returns a pointer to the condition string. (It does not
7559 attempt to evaluate the string against a particular block.) And,
7560 it updates arg to point to the first character following the parsed
7561 if clause in the arg string. */
7564 ep_parse_optional_if_clause (char **arg)
7568 if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace ((*arg)[2]))
7571 /* Skip the "if" keyword. */
7574 /* Skip any extra leading whitespace, and record the start of the
7575 condition string. */
7576 ep_skip_leading_whitespace (arg);
7579 /* Assume that the condition occupies the remainder of the arg string. */
7580 (*arg) += strlen (cond_string);
7585 /* This function attempts to parse an optional filename from the arg
7586 string. If one is not found, it returns NULL.
7588 Else, it returns a pointer to the parsed filename. (This function
7589 makes no attempt to verify that a file of that name exists, or is
7590 accessible.) And, it updates arg to point to the first character
7591 following the parsed filename in the arg string.
7593 Note that clients needing to preserve the returned filename for
7594 future access should copy it to their own buffers. */
7596 ep_parse_optional_filename (char **arg)
7598 static char filename[1024];
7603 if ((*arg_p == '\0') || isspace (*arg_p))
7621 /* Commands to deal with catching events, such as signals, exceptions,
7622 process start/exit, etc. */
7626 catch_fork_temporary, catch_vfork_temporary,
7627 catch_fork_permanent, catch_vfork_permanent
7632 catch_fork_command_1 (char *arg, int from_tty, struct cmd_list_element *command)
7634 struct gdbarch *gdbarch = get_current_arch ();
7635 char *cond_string = NULL;
7636 catch_fork_kind fork_kind;
7639 fork_kind = (catch_fork_kind) (uintptr_t) get_cmd_context (command);
7640 tempflag = (fork_kind == catch_fork_temporary
7641 || fork_kind == catch_vfork_temporary);
7645 ep_skip_leading_whitespace (&arg);
7647 /* The allowed syntax is:
7649 catch [v]fork if <cond>
7651 First, check if there's an if clause. */
7652 cond_string = ep_parse_optional_if_clause (&arg);
7654 if ((*arg != '\0') && !isspace (*arg))
7655 error (_("Junk at end of arguments."));
7657 /* If this target supports it, create a fork or vfork catchpoint
7658 and enable reporting of such events. */
7661 case catch_fork_temporary:
7662 case catch_fork_permanent:
7663 create_fork_vfork_event_catchpoint (gdbarch, tempflag, cond_string,
7664 &catch_fork_breakpoint_ops);
7666 case catch_vfork_temporary:
7667 case catch_vfork_permanent:
7668 create_fork_vfork_event_catchpoint (gdbarch, tempflag, cond_string,
7669 &catch_vfork_breakpoint_ops);
7672 error (_("unsupported or unknown fork kind; cannot catch it"));
7678 catch_exec_command_1 (char *arg, int from_tty, struct cmd_list_element *command)
7680 struct gdbarch *gdbarch = get_current_arch ();
7682 char *cond_string = NULL;
7684 tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
7688 ep_skip_leading_whitespace (&arg);
7690 /* The allowed syntax is:
7692 catch exec if <cond>
7694 First, check if there's an if clause. */
7695 cond_string = ep_parse_optional_if_clause (&arg);
7697 if ((*arg != '\0') && !isspace (*arg))
7698 error (_("Junk at end of arguments."));
7700 /* If this target supports it, create an exec catchpoint
7701 and enable reporting of such events. */
7702 create_catchpoint (gdbarch, tempflag, cond_string,
7703 &catch_exec_breakpoint_ops);
7706 static enum print_stop_action
7707 print_exception_catchpoint (struct breakpoint *b)
7709 int bp_temp, bp_throw;
7711 annotate_catchpoint (b->number);
7713 bp_throw = strstr (b->addr_string, "throw") != NULL;
7714 if (b->loc->address != b->loc->requested_address)
7715 breakpoint_adjustment_warning (b->loc->requested_address,
7718 bp_temp = b->disposition == disp_del;
7720 bp_temp ? "Temporary catchpoint "
7722 if (!ui_out_is_mi_like_p (uiout))
7723 ui_out_field_int (uiout, "bkptno", b->number);
7725 bp_throw ? " (exception thrown), "
7726 : " (exception caught), ");
7727 if (ui_out_is_mi_like_p (uiout))
7729 ui_out_field_string (uiout, "reason",
7730 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT));
7731 ui_out_field_string (uiout, "disp", bpdisp_text (b->disposition));
7732 ui_out_field_int (uiout, "bkptno", b->number);
7734 return PRINT_SRC_AND_LOC;
7738 print_one_exception_catchpoint (struct breakpoint *b, struct bp_location **last_loc)
7740 struct value_print_options opts;
7741 get_user_print_options (&opts);
7742 if (opts.addressprint)
7745 if (b->loc == NULL || b->loc->shlib_disabled)
7746 ui_out_field_string (uiout, "addr", "<PENDING>");
7748 ui_out_field_core_addr (uiout, "addr",
7749 b->loc->gdbarch, b->loc->address);
7754 if (strstr (b->addr_string, "throw") != NULL)
7755 ui_out_field_string (uiout, "what", "exception throw");
7757 ui_out_field_string (uiout, "what", "exception catch");
7761 print_mention_exception_catchpoint (struct breakpoint *b)
7766 bp_temp = b->disposition == disp_del;
7767 bp_throw = strstr (b->addr_string, "throw") != NULL;
7768 ui_out_text (uiout, bp_temp ? _("Temporary catchpoint ")
7769 : _("Catchpoint "));
7770 ui_out_field_int (uiout, "bkptno", b->number);
7771 ui_out_text (uiout, bp_throw ? _(" (throw)")
7775 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops = {
7778 NULL, /* breakpoint_hit */
7779 print_exception_catchpoint,
7780 print_one_exception_catchpoint,
7781 print_mention_exception_catchpoint
7785 handle_gnu_v3_exceptions (int tempflag, char *cond_string,
7786 enum exception_event_kind ex_event, int from_tty)
7788 char *trigger_func_name;
7790 if (ex_event == EX_EVENT_CATCH)
7791 trigger_func_name = "__cxa_begin_catch";
7793 trigger_func_name = "__cxa_throw";
7795 break_command_really (get_current_arch (),
7796 trigger_func_name, cond_string, -1,
7797 0 /* condition and thread are valid. */,
7800 AUTO_BOOLEAN_TRUE /* pending */,
7801 &gnu_v3_exception_catchpoint_ops, from_tty,
7807 /* Deal with "catch catch" and "catch throw" commands */
7810 catch_exception_command_1 (enum exception_event_kind ex_event, char *arg,
7811 int tempflag, int from_tty)
7813 char *cond_string = NULL;
7814 struct symtab_and_line *sal = NULL;
7818 ep_skip_leading_whitespace (&arg);
7820 cond_string = ep_parse_optional_if_clause (&arg);
7822 if ((*arg != '\0') && !isspace (*arg))
7823 error (_("Junk at end of arguments."));
7825 if (ex_event != EX_EVENT_THROW
7826 && ex_event != EX_EVENT_CATCH)
7827 error (_("Unsupported or unknown exception event; cannot catch it"));
7829 if (handle_gnu_v3_exceptions (tempflag, cond_string, ex_event, from_tty))
7832 warning (_("Unsupported with this platform/compiler combination."));
7835 /* Implementation of "catch catch" command. */
7838 catch_catch_command (char *arg, int from_tty, struct cmd_list_element *command)
7840 int tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
7841 catch_exception_command_1 (EX_EVENT_CATCH, arg, tempflag, from_tty);
7844 /* Implementation of "catch throw" command. */
7847 catch_throw_command (char *arg, int from_tty, struct cmd_list_element *command)
7849 int tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
7850 catch_exception_command_1 (EX_EVENT_THROW, arg, tempflag, from_tty);
7853 /* Create a breakpoint struct for Ada exception catchpoints. */
7856 create_ada_exception_breakpoint (struct gdbarch *gdbarch,
7857 struct symtab_and_line sal,
7861 struct expression *cond,
7862 struct breakpoint_ops *ops,
7866 struct breakpoint *b;
7870 struct gdbarch *loc_gdbarch = get_sal_arch (sal);
7872 loc_gdbarch = gdbarch;
7874 describe_other_breakpoints (loc_gdbarch,
7875 sal.pspace, sal.pc, sal.section, -1);
7876 /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
7877 version for exception catchpoints, because two catchpoints
7878 used for different exception names will use the same address.
7879 In this case, a "breakpoint ... also set at..." warning is
7880 unproductive. Besides. the warning phrasing is also a bit
7881 inapropriate, we should use the word catchpoint, and tell
7882 the user what type of catchpoint it is. The above is good
7883 enough for now, though. */
7886 b = set_raw_breakpoint (gdbarch, sal, bp_breakpoint);
7887 set_breakpoint_count (breakpoint_count + 1);
7889 b->enable_state = bp_enabled;
7890 b->disposition = tempflag ? disp_del : disp_donttouch;
7891 b->number = breakpoint_count;
7892 b->ignore_count = 0;
7893 b->loc->cond = cond;
7894 b->addr_string = addr_string;
7895 b->language = language_ada;
7896 b->cond_string = cond_string;
7897 b->exp_string = exp_string;
7902 update_global_location_list (1);
7905 /* Implement the "catch exception" command. */
7908 catch_ada_exception_command (char *arg, int from_tty,
7909 struct cmd_list_element *command)
7911 struct gdbarch *gdbarch = get_current_arch ();
7913 struct symtab_and_line sal;
7915 char *addr_string = NULL;
7916 char *exp_string = NULL;
7917 char *cond_string = NULL;
7918 struct expression *cond = NULL;
7919 struct breakpoint_ops *ops = NULL;
7921 tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
7925 sal = ada_decode_exception_location (arg, &addr_string, &exp_string,
7926 &cond_string, &cond, &ops);
7927 create_ada_exception_breakpoint (gdbarch, sal, addr_string, exp_string,
7928 cond_string, cond, ops, tempflag,
7932 /* Cleanup function for a syscall filter list. */
7934 clean_up_filters (void *arg)
7936 VEC(int) *iter = *(VEC(int) **) arg;
7937 VEC_free (int, iter);
7940 /* Splits the argument using space as delimiter. Returns an xmalloc'd
7941 filter list, or NULL if no filtering is required. */
7943 catch_syscall_split_args (char *arg)
7945 VEC(int) *result = NULL;
7946 struct cleanup *cleanup = make_cleanup (clean_up_filters, &result);
7948 while (*arg != '\0')
7950 int i, syscall_number;
7955 /* Skip whitespace. */
7956 while (isspace (*arg))
7959 for (i = 0; i < 127 && arg[i] && !isspace (arg[i]); ++i)
7960 cur_name[i] = arg[i];
7964 /* Check if the user provided a syscall name or a number. */
7965 syscall_number = (int) strtol (cur_name, &endptr, 0);
7966 if (*endptr == '\0')
7967 get_syscall_by_number (syscall_number, &s);
7970 /* We have a name. Let's check if it's valid and convert it
7972 get_syscall_by_name (cur_name, &s);
7974 if (s.number == UNKNOWN_SYSCALL)
7975 /* Here we have to issue an error instead of a warning, because
7976 GDB cannot do anything useful if there's no syscall number to
7978 error (_("Unknown syscall name '%s'."), cur_name);
7981 /* Ok, it's valid. */
7982 VEC_safe_push (int, result, s.number);
7985 discard_cleanups (cleanup);
7989 /* Implement the "catch syscall" command. */
7992 catch_syscall_command_1 (char *arg, int from_tty, struct cmd_list_element *command)
7997 struct gdbarch *gdbarch = get_current_arch ();
7999 /* Checking if the feature if supported. */
8000 if (gdbarch_get_syscall_number_p (gdbarch) == 0)
8001 error (_("The feature 'catch syscall' is not supported on \
8002 this architeture yet."));
8004 tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
8006 ep_skip_leading_whitespace (&arg);
8008 /* We need to do this first "dummy" translation in order
8009 to get the syscall XML file loaded or, most important,
8010 to display a warning to the user if there's no XML file
8011 for his/her architecture. */
8012 get_syscall_by_number (0, &s);
8014 /* The allowed syntax is:
8016 catch syscall <name | number> [<name | number> ... <name | number>]
8018 Let's check if there's a syscall name. */
8021 filter = catch_syscall_split_args (arg);
8025 create_syscall_event_catchpoint (tempflag, filter,
8026 &catch_syscall_breakpoint_ops);
8029 /* Implement the "catch assert" command. */
8032 catch_assert_command (char *arg, int from_tty, struct cmd_list_element *command)
8034 struct gdbarch *gdbarch = get_current_arch ();
8036 struct symtab_and_line sal;
8037 char *addr_string = NULL;
8038 struct breakpoint_ops *ops = NULL;
8040 tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
8044 sal = ada_decode_assert_location (arg, &addr_string, &ops);
8045 create_ada_exception_breakpoint (gdbarch, sal, addr_string, NULL, NULL, NULL,
8046 ops, tempflag, from_tty);
8050 catch_command (char *arg, int from_tty)
8052 error (_("Catch requires an event name."));
8057 tcatch_command (char *arg, int from_tty)
8059 error (_("Catch requires an event name."));
8062 /* Delete breakpoints by address or line. */
8065 clear_command (char *arg, int from_tty)
8067 struct breakpoint *b;
8068 VEC(breakpoint_p) *found = 0;
8071 struct symtabs_and_lines sals;
8072 struct symtab_and_line sal;
8077 sals = decode_line_spec (arg, 1);
8082 sals.sals = (struct symtab_and_line *)
8083 xmalloc (sizeof (struct symtab_and_line));
8084 make_cleanup (xfree, sals.sals);
8085 init_sal (&sal); /* initialize to zeroes */
8086 sal.line = default_breakpoint_line;
8087 sal.symtab = default_breakpoint_symtab;
8088 sal.pc = default_breakpoint_address;
8089 sal.pspace = default_breakpoint_pspace;
8090 if (sal.symtab == 0)
8091 error (_("No source file specified."));
8099 /* We don't call resolve_sal_pc here. That's not
8100 as bad as it seems, because all existing breakpoints
8101 typically have both file/line and pc set. So, if
8102 clear is given file/line, we can match this to existing
8103 breakpoint without obtaining pc at all.
8105 We only support clearing given the address explicitly
8106 present in breakpoint table. Say, we've set breakpoint
8107 at file:line. There were several PC values for that file:line,
8108 due to optimization, all in one block.
8109 We've picked one PC value. If "clear" is issued with another
8110 PC corresponding to the same file:line, the breakpoint won't
8111 be cleared. We probably can still clear the breakpoint, but
8112 since the other PC value is never presented to user, user
8113 can only find it by guessing, and it does not seem important
8116 /* For each line spec given, delete bps which correspond
8117 to it. Do it in two passes, solely to preserve the current
8118 behavior that from_tty is forced true if we delete more than
8122 for (i = 0; i < sals.nelts; i++)
8124 /* If exact pc given, clear bpts at that pc.
8125 If line given (pc == 0), clear all bpts on specified line.
8126 If defaulting, clear all bpts on default line
8129 defaulting sal.pc != 0 tests to do
8134 1 0 <can't happen> */
8138 /* Find all matching breakpoints and add them to
8143 /* Are we going to delete b? */
8144 if (b->type != bp_none
8145 && b->type != bp_watchpoint
8146 && b->type != bp_hardware_watchpoint
8147 && b->type != bp_read_watchpoint
8148 && b->type != bp_access_watchpoint)
8150 struct bp_location *loc = b->loc;
8151 for (; loc; loc = loc->next)
8153 int pc_match = sal.pc
8154 && (loc->pspace == sal.pspace)
8155 && (loc->address == sal.pc)
8156 && (!section_is_overlay (loc->section)
8157 || loc->section == sal.section);
8158 int line_match = ((default_match || (0 == sal.pc))
8159 && b->source_file != NULL
8160 && sal.symtab != NULL
8161 && sal.pspace == loc->pspace
8162 && strcmp (b->source_file, sal.symtab->filename) == 0
8163 && b->line_number == sal.line);
8164 if (pc_match || line_match)
8173 VEC_safe_push(breakpoint_p, found, b);
8176 /* Now go thru the 'found' chain and delete them. */
8177 if (VEC_empty(breakpoint_p, found))
8180 error (_("No breakpoint at %s."), arg);
8182 error (_("No breakpoint at this line."));
8185 if (VEC_length(breakpoint_p, found) > 1)
8186 from_tty = 1; /* Always report if deleted more than one */
8189 if (VEC_length(breakpoint_p, found) == 1)
8190 printf_unfiltered (_("Deleted breakpoint "));
8192 printf_unfiltered (_("Deleted breakpoints "));
8194 breakpoints_changed ();
8196 for (ix = 0; VEC_iterate(breakpoint_p, found, ix, b); ix++)
8199 printf_unfiltered ("%d ", b->number);
8200 delete_breakpoint (b);
8203 putchar_unfiltered ('\n');
8206 /* Delete breakpoint in BS if they are `delete' breakpoints and
8207 all breakpoints that are marked for deletion, whether hit or not.
8208 This is called after any breakpoint is hit, or after errors. */
8211 breakpoint_auto_delete (bpstat bs)
8213 struct breakpoint *b, *temp;
8215 for (; bs; bs = bs->next)
8216 if (bs->breakpoint_at
8217 && bs->breakpoint_at->owner
8218 && bs->breakpoint_at->owner->disposition == disp_del
8220 delete_breakpoint (bs->breakpoint_at->owner);
8222 ALL_BREAKPOINTS_SAFE (b, temp)
8224 if (b->disposition == disp_del_at_next_stop)
8225 delete_breakpoint (b);
8229 /* A comparison function for bp_location AP and BP being interfaced to qsort.
8230 Sort elements primarily by their ADDRESS (no matter what does
8231 breakpoint_address_is_meaningful say for its OWNER), secondarily by ordering
8232 first bp_permanent OWNERed elements and terciarily just ensuring the array
8233 is sorted stable way despite qsort being an instable algorithm. */
8236 bp_location_compare (const void *ap, const void *bp)
8238 struct bp_location *a = *(void **) ap;
8239 struct bp_location *b = *(void **) bp;
8240 int a_perm = a->owner->enable_state == bp_permanent;
8241 int b_perm = b->owner->enable_state == bp_permanent;
8243 if (a->address != b->address)
8244 return (a->address > b->address) - (a->address < b->address);
8246 /* Sort permanent breakpoints first. */
8247 if (a_perm != b_perm)
8248 return (a_perm < b_perm) - (a_perm > b_perm);
8250 /* Make the user-visible order stable across GDB runs. Locations of the same
8251 breakpoint can be sorted in arbitrary order. */
8253 if (a->owner->number != b->owner->number)
8254 return (a->owner->number > b->owner->number)
8255 - (a->owner->number < b->owner->number);
8257 return (a > b) - (a < b);
8260 /* Set bp_location_placed_address_before_address_max and
8261 bp_location_shadow_len_after_address_max according to the current content of
8262 the bp_location array. */
8265 bp_location_target_extensions_update (void)
8267 struct bp_location *bl, **blp_tmp;
8269 bp_location_placed_address_before_address_max = 0;
8270 bp_location_shadow_len_after_address_max = 0;
8272 ALL_BP_LOCATIONS (bl, blp_tmp)
8274 CORE_ADDR start, end, addr;
8276 if (!bp_location_has_shadow (bl))
8279 start = bl->target_info.placed_address;
8280 end = start + bl->target_info.shadow_len;
8282 gdb_assert (bl->address >= start);
8283 addr = bl->address - start;
8284 if (addr > bp_location_placed_address_before_address_max)
8285 bp_location_placed_address_before_address_max = addr;
8287 /* Zero SHADOW_LEN would not pass bp_location_has_shadow. */
8289 gdb_assert (bl->address < end);
8290 addr = end - bl->address;
8291 if (addr > bp_location_shadow_len_after_address_max)
8292 bp_location_shadow_len_after_address_max = addr;
8296 /* If SHOULD_INSERT is false, do not insert any breakpoint locations
8297 into the inferior, only remove already-inserted locations that no
8298 longer should be inserted. Functions that delete a breakpoint or
8299 breakpoints should pass false, so that deleting a breakpoint
8300 doesn't have the side effect of inserting the locations of other
8301 breakpoints that are marked not-inserted, but should_be_inserted
8302 returns true on them.
8304 This behaviour is useful is situations close to tear-down -- e.g.,
8305 after an exec, while the target still has execution, but breakpoint
8306 shadows of the previous executable image should *NOT* be restored
8307 to the new image; or before detaching, where the target still has
8308 execution and wants to delete breakpoints from GDB's lists, and all
8309 breakpoints had already been removed from the inferior. */
8312 update_global_location_list (int should_insert)
8314 struct breakpoint *b;
8315 struct bp_location **locp, *loc;
8316 struct cleanup *cleanups;
8318 /* Used in the duplicates detection below. When iterating over all
8319 bp_locations, points to the first bp_location of a given address.
8320 Breakpoints and watchpoints of different types are never
8321 duplicates of each other. Keep one pointer for each type of
8322 breakpoint/watchpoint, so we only need to loop over all locations
8324 struct bp_location *bp_loc_first; /* breakpoint */
8325 struct bp_location *wp_loc_first; /* hardware watchpoint */
8326 struct bp_location *awp_loc_first; /* access watchpoint */
8327 struct bp_location *rwp_loc_first; /* read watchpoint */
8329 /* Saved former bp_location array which we compare against the newly built
8330 bp_location from the current state of ALL_BREAKPOINTS. */
8331 struct bp_location **old_location, **old_locp;
8332 unsigned old_location_count;
8334 old_location = bp_location;
8335 old_location_count = bp_location_count;
8337 bp_location_count = 0;
8338 cleanups = make_cleanup (xfree, old_location);
8341 for (loc = b->loc; loc; loc = loc->next)
8342 bp_location_count++;
8344 bp_location = xmalloc (sizeof (*bp_location) * bp_location_count);
8347 for (loc = b->loc; loc; loc = loc->next)
8349 qsort (bp_location, bp_location_count, sizeof (*bp_location),
8350 bp_location_compare);
8352 bp_location_target_extensions_update ();
8354 /* Identify bp_location instances that are no longer present in the new
8355 list, and therefore should be freed. Note that it's not necessary that
8356 those locations should be removed from inferior -- if there's another
8357 location at the same address (previously marked as duplicate),
8358 we don't need to remove/insert the location.
8360 LOCP is kept in sync with OLD_LOCP, each pointing to the current and
8361 former bp_location array state respectively. */
8364 for (old_locp = old_location; old_locp < old_location + old_location_count;
8367 struct bp_location *old_loc = *old_locp;
8368 struct bp_location **loc2p;
8370 /* Tells if 'old_loc' is found amoung the new locations. If not, we
8372 int found_object = 0;
8373 /* Tells if the location should remain inserted in the target. */
8374 int keep_in_target = 0;
8377 /* Skip LOCP entries which will definitely never be needed. Stop either
8378 at or being the one matching OLD_LOC. */
8379 while (locp < bp_location + bp_location_count
8380 && (*locp)->address < old_loc->address)
8384 (loc2p < bp_location + bp_location_count
8385 && (*loc2p)->address == old_loc->address);
8388 if (*loc2p == old_loc)
8395 /* If this location is no longer present, and inserted, look if there's
8396 maybe a new location at the same address. If so, mark that one
8397 inserted, and don't remove this one. This is needed so that we
8398 don't have a time window where a breakpoint at certain location is not
8401 if (old_loc->inserted)
8403 /* If the location is inserted now, we might have to remove it. */
8405 if (found_object && should_be_inserted (old_loc))
8407 /* The location is still present in the location list, and still
8408 should be inserted. Don't do anything. */
8413 /* The location is either no longer present, or got disabled.
8414 See if there's another location at the same address, in which
8415 case we don't need to remove this one from the target. */
8417 if (breakpoint_address_is_meaningful (old_loc->owner))
8420 (loc2p < bp_location + bp_location_count
8421 && (*loc2p)->address == old_loc->address);
8424 struct bp_location *loc2 = *loc2p;
8426 if (breakpoint_locations_match (loc2, old_loc))
8428 /* For the sake of should_be_inserted.
8429 Duplicates check below will fix up this later. */
8430 loc2->duplicate = 0;
8431 if (loc2 != old_loc && should_be_inserted (loc2))
8434 loc2->target_info = old_loc->target_info;
8443 if (!keep_in_target)
8445 if (remove_breakpoint (old_loc, mark_uninserted))
8447 /* This is just about all we can do. We could keep this
8448 location on the global list, and try to remove it next
8449 time, but there's no particular reason why we will
8452 Note that at this point, old_loc->owner is still valid,
8453 as delete_breakpoint frees the breakpoint only
8454 after calling us. */
8455 printf_filtered (_("warning: Error removing breakpoint %d\n"),
8456 old_loc->owner->number);
8464 if (removed && non_stop
8465 && breakpoint_address_is_meaningful (old_loc->owner)
8466 && !is_hardware_watchpoint (old_loc->owner))
8468 /* This location was removed from the target. In
8469 non-stop mode, a race condition is possible where
8470 we've removed a breakpoint, but stop events for that
8471 breakpoint are already queued and will arrive later.
8472 We apply an heuristic to be able to distinguish such
8473 SIGTRAPs from other random SIGTRAPs: we keep this
8474 breakpoint location for a bit, and will retire it
8475 after we see some number of events. The theory here
8476 is that reporting of events should, "on the average",
8477 be fair, so after a while we'll see events from all
8478 threads that have anything of interest, and no longer
8479 need to keep this breakpoint location around. We
8480 don't hold locations forever so to reduce chances of
8481 mistaking a non-breakpoint SIGTRAP for a breakpoint
8484 The heuristic failing can be disastrous on
8485 decr_pc_after_break targets.
8487 On decr_pc_after_break targets, like e.g., x86-linux,
8488 if we fail to recognize a late breakpoint SIGTRAP,
8489 because events_till_retirement has reached 0 too
8490 soon, we'll fail to do the PC adjustment, and report
8491 a random SIGTRAP to the user. When the user resumes
8492 the inferior, it will most likely immediately crash
8493 with SIGILL/SIGBUS/SEGSEGV, or worse, get silently
8494 corrupted, because of being resumed e.g., in the
8495 middle of a multi-byte instruction, or skipped a
8496 one-byte instruction. This was actually seen happen
8497 on native x86-linux, and should be less rare on
8498 targets that do not support new thread events, like
8499 remote, due to the heuristic depending on
8502 Mistaking a random SIGTRAP for a breakpoint trap
8503 causes similar symptoms (PC adjustment applied when
8504 it shouldn't), but then again, playing with SIGTRAPs
8505 behind the debugger's back is asking for trouble.
8507 Since hardware watchpoint traps are always
8508 distinguishable from other traps, so we don't need to
8509 apply keep hardware watchpoint moribund locations
8510 around. We simply always ignore hardware watchpoint
8511 traps we can no longer explain. */
8513 old_loc->events_till_retirement = 3 * (thread_count () + 1);
8514 old_loc->owner = NULL;
8516 VEC_safe_push (bp_location_p, moribund_locations, old_loc);
8519 free_bp_location (old_loc);
8523 /* Rescan breakpoints at the same address and section, marking the
8524 first one as "first" and any others as "duplicates". This is so
8525 that the bpt instruction is only inserted once. If we have a
8526 permanent breakpoint at the same place as BPT, make that one the
8527 official one, and the rest as duplicates. Permanent breakpoints
8528 are sorted first for the same address.
8530 Do the same for hardware watchpoints, but also considering the
8531 watchpoint's type (regular/access/read) and length. */
8533 bp_loc_first = NULL;
8534 wp_loc_first = NULL;
8535 awp_loc_first = NULL;
8536 rwp_loc_first = NULL;
8537 ALL_BP_LOCATIONS (loc, locp)
8539 struct breakpoint *b = loc->owner;
8540 struct bp_location **loc_first_p;
8542 if (b->enable_state == bp_disabled
8543 || b->enable_state == bp_call_disabled
8544 || b->enable_state == bp_startup_disabled
8546 || loc->shlib_disabled
8547 || !breakpoint_address_is_meaningful (b))
8550 /* Permanent breakpoint should always be inserted. */
8551 if (b->enable_state == bp_permanent && ! loc->inserted)
8552 internal_error (__FILE__, __LINE__,
8553 _("allegedly permanent breakpoint is not "
8554 "actually inserted"));
8556 if (b->type == bp_hardware_watchpoint)
8557 loc_first_p = &wp_loc_first;
8558 else if (b->type == bp_read_watchpoint)
8559 loc_first_p = &rwp_loc_first;
8560 else if (b->type == bp_access_watchpoint)
8561 loc_first_p = &awp_loc_first;
8563 loc_first_p = &bp_loc_first;
8565 if (*loc_first_p == NULL
8566 || (overlay_debugging && loc->section != (*loc_first_p)->section)
8567 || !breakpoint_locations_match (loc, *loc_first_p))
8576 if ((*loc_first_p)->owner->enable_state == bp_permanent && loc->inserted
8577 && b->enable_state != bp_permanent)
8578 internal_error (__FILE__, __LINE__,
8579 _("another breakpoint was inserted on top of "
8580 "a permanent breakpoint"));
8583 if (breakpoints_always_inserted_mode () && should_insert
8584 && (have_live_inferiors ()
8585 || (gdbarch_has_global_breakpoints (target_gdbarch))))
8586 insert_breakpoint_locations ();
8588 do_cleanups (cleanups);
8592 breakpoint_retire_moribund (void)
8594 struct bp_location *loc;
8597 for (ix = 0; VEC_iterate (bp_location_p, moribund_locations, ix, loc); ++ix)
8598 if (--(loc->events_till_retirement) == 0)
8600 free_bp_location (loc);
8601 VEC_unordered_remove (bp_location_p, moribund_locations, ix);
8607 update_global_location_list_nothrow (int inserting)
8609 struct gdb_exception e;
8610 TRY_CATCH (e, RETURN_MASK_ERROR)
8611 update_global_location_list (inserting);
8614 /* Clear BPT from a BPS. */
8616 bpstat_remove_breakpoint (bpstat bps, struct breakpoint *bpt)
8619 for (bs = bps; bs; bs = bs->next)
8620 if (bs->breakpoint_at && bs->breakpoint_at->owner == bpt)
8622 bs->breakpoint_at = NULL;
8624 /* bs->commands will be freed later. */
8628 /* Callback for iterate_over_threads. */
8630 bpstat_remove_breakpoint_callback (struct thread_info *th, void *data)
8632 struct breakpoint *bpt = data;
8633 bpstat_remove_breakpoint (th->stop_bpstat, bpt);
8637 /* Delete a breakpoint and clean up all traces of it in the data
8641 delete_breakpoint (struct breakpoint *bpt)
8643 struct breakpoint *b;
8644 struct bp_location *loc, *next;
8646 gdb_assert (bpt != NULL);
8648 /* Has this bp already been deleted? This can happen because multiple
8649 lists can hold pointers to bp's. bpstat lists are especial culprits.
8651 One example of this happening is a watchpoint's scope bp. When the
8652 scope bp triggers, we notice that the watchpoint is out of scope, and
8653 delete it. We also delete its scope bp. But the scope bp is marked
8654 "auto-deleting", and is already on a bpstat. That bpstat is then
8655 checked for auto-deleting bp's, which are deleted.
8657 A real solution to this problem might involve reference counts in bp's,
8658 and/or giving them pointers back to their referencing bpstat's, and
8659 teaching delete_breakpoint to only free a bp's storage when no more
8660 references were extent. A cheaper bandaid was chosen. */
8661 if (bpt->type == bp_none)
8664 observer_notify_breakpoint_deleted (bpt->number);
8666 if (breakpoint_chain == bpt)
8667 breakpoint_chain = bpt->next;
8672 b->next = bpt->next;
8676 free_command_lines (&bpt->commands);
8677 if (bpt->cond_string != NULL)
8678 xfree (bpt->cond_string);
8679 if (bpt->addr_string != NULL)
8680 xfree (bpt->addr_string);
8681 if (bpt->exp != NULL)
8683 if (bpt->exp_string != NULL)
8684 xfree (bpt->exp_string);
8685 if (bpt->val != NULL)
8686 value_free (bpt->val);
8687 if (bpt->source_file != NULL)
8688 xfree (bpt->source_file);
8689 if (bpt->exec_pathname != NULL)
8690 xfree (bpt->exec_pathname);
8691 clean_up_filters (&bpt->syscalls_to_be_caught);
8693 /* Be sure no bpstat's are pointing at it after it's been freed. */
8694 /* FIXME, how can we find all bpstat's?
8695 We just check stop_bpstat for now. Note that we cannot just
8696 remove bpstats pointing at bpt from the stop_bpstat list
8697 entirely, as breakpoint commands are associated with the bpstat;
8698 if we remove it here, then the later call to
8699 bpstat_do_actions (&stop_bpstat);
8700 in event-top.c won't do anything, and temporary breakpoints
8701 with commands won't work. */
8703 iterate_over_threads (bpstat_remove_breakpoint_callback, bpt);
8705 /* Now that breakpoint is removed from breakpoint
8706 list, update the global location list. This
8707 will remove locations that used to belong to
8708 this breakpoint. Do this before freeing
8709 the breakpoint itself, since remove_breakpoint
8710 looks at location's owner. It might be better
8711 design to have location completely self-contained,
8712 but it's not the case now. */
8713 update_global_location_list (0);
8716 /* On the chance that someone will soon try again to delete this same
8717 bp, we mark it as deleted before freeing its storage. */
8718 bpt->type = bp_none;
8724 do_delete_breakpoint_cleanup (void *b)
8726 delete_breakpoint (b);
8730 make_cleanup_delete_breakpoint (struct breakpoint *b)
8732 return make_cleanup (do_delete_breakpoint_cleanup, b);
8736 delete_command (char *arg, int from_tty)
8738 struct breakpoint *b, *temp;
8744 int breaks_to_delete = 0;
8746 /* Delete all breakpoints if no argument.
8747 Do not delete internal or call-dummy breakpoints, these
8748 have to be deleted with an explicit breakpoint number argument. */
8751 if (b->type != bp_call_dummy
8752 && b->type != bp_shlib_event
8753 && b->type != bp_jit_event
8754 && b->type != bp_thread_event
8755 && b->type != bp_overlay_event
8756 && b->type != bp_longjmp_master
8759 breaks_to_delete = 1;
8764 /* Ask user only if there are some breakpoints to delete. */
8766 || (breaks_to_delete && query (_("Delete all breakpoints? "))))
8768 ALL_BREAKPOINTS_SAFE (b, temp)
8770 if (b->type != bp_call_dummy
8771 && b->type != bp_shlib_event
8772 && b->type != bp_thread_event
8773 && b->type != bp_jit_event
8774 && b->type != bp_overlay_event
8775 && b->type != bp_longjmp_master
8777 delete_breakpoint (b);
8782 map_breakpoint_numbers (arg, delete_breakpoint);
8786 all_locations_are_pending (struct bp_location *loc)
8788 for (; loc; loc = loc->next)
8789 if (!loc->shlib_disabled)
8794 /* Subroutine of update_breakpoint_locations to simplify it.
8795 Return non-zero if multiple fns in list LOC have the same name.
8796 Null names are ignored. */
8799 ambiguous_names_p (struct bp_location *loc)
8801 struct bp_location *l;
8802 htab_t htab = htab_create_alloc (13, htab_hash_string,
8803 (int (*) (const void *, const void *)) streq,
8804 NULL, xcalloc, xfree);
8806 for (l = loc; l != NULL; l = l->next)
8809 const char *name = l->function_name;
8811 /* Allow for some names to be NULL, ignore them. */
8815 slot = (const char **) htab_find_slot (htab, (const void *) name,
8817 /* NOTE: We can assume slot != NULL here because xcalloc never returns
8832 update_breakpoint_locations (struct breakpoint *b,
8833 struct symtabs_and_lines sals)
8837 struct bp_location *existing_locations = b->loc;
8839 /* If there's no new locations, and all existing locations
8840 are pending, don't do anything. This optimizes
8841 the common case where all locations are in the same
8842 shared library, that was unloaded. We'd like to
8843 retain the location, so that when the library
8844 is loaded again, we don't loose the enabled/disabled
8845 status of the individual locations. */
8846 if (all_locations_are_pending (existing_locations) && sals.nelts == 0)
8851 for (i = 0; i < sals.nelts; ++i)
8853 struct bp_location *new_loc =
8854 add_location_to_breakpoint (b, &(sals.sals[i]));
8856 /* Reparse conditions, they might contain references to the
8858 if (b->cond_string != NULL)
8860 struct gdb_exception e;
8863 TRY_CATCH (e, RETURN_MASK_ERROR)
8865 new_loc->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc),
8870 warning (_("failed to reevaluate condition for breakpoint %d: %s"),
8871 b->number, e.message);
8872 new_loc->enabled = 0;
8876 if (b->source_file != NULL)
8877 xfree (b->source_file);
8878 if (sals.sals[i].symtab == NULL)
8879 b->source_file = NULL;
8881 b->source_file = xstrdup (sals.sals[i].symtab->filename);
8883 if (b->line_number == 0)
8884 b->line_number = sals.sals[i].line;
8887 /* Update locations of permanent breakpoints. */
8888 if (b->enable_state == bp_permanent)
8889 make_breakpoint_permanent (b);
8891 /* If possible, carry over 'disable' status from existing breakpoints. */
8893 struct bp_location *e = existing_locations;
8894 /* If there are multiple breakpoints with the same function name,
8895 e.g. for inline functions, comparing function names won't work.
8896 Instead compare pc addresses; this is just a heuristic as things
8897 may have moved, but in practice it gives the correct answer
8898 often enough until a better solution is found. */
8899 int have_ambiguous_names = ambiguous_names_p (b->loc);
8901 for (; e; e = e->next)
8903 if (!e->enabled && e->function_name)
8905 struct bp_location *l = b->loc;
8906 if (have_ambiguous_names)
8908 for (; l; l = l->next)
8909 if (breakpoint_address_match (e->pspace->aspace, e->address,
8910 l->pspace->aspace, l->address))
8918 for (; l; l = l->next)
8919 if (l->function_name
8920 && strcmp (e->function_name, l->function_name) == 0)
8930 update_global_location_list (1);
8934 /* Reset a breakpoint given it's struct breakpoint * BINT.
8935 The value we return ends up being the return value from catch_errors.
8936 Unused in this case. */
8939 breakpoint_re_set_one (void *bint)
8941 /* get past catch_errs */
8942 struct breakpoint *b = (struct breakpoint *) bint;
8946 int *not_found_ptr = ¬_found;
8947 struct symtabs_and_lines sals = {0};
8948 struct symtabs_and_lines expanded = {0};
8950 enum enable_state save_enable;
8951 struct gdb_exception e;
8952 struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
8957 warning (_("attempted to reset apparently deleted breakpoint #%d?"),
8961 case bp_hardware_breakpoint:
8963 /* Do not attempt to re-set breakpoints disabled during startup. */
8964 if (b->enable_state == bp_startup_disabled)
8967 if (b->addr_string == NULL)
8969 /* Anything without a string can't be re-set. */
8970 delete_breakpoint (b);
8974 set_language (b->language);
8975 input_radix = b->input_radix;
8978 save_current_space_and_thread ();
8979 switch_to_program_space_and_thread (b->pspace);
8981 TRY_CATCH (e, RETURN_MASK_ERROR)
8983 sals = decode_line_1 (&s, 1, (struct symtab *) NULL, 0, (char ***) NULL,
8988 int not_found_and_ok = 0;
8989 /* For pending breakpoints, it's expected that parsing
8990 will fail until the right shared library is loaded.
8991 User has already told to create pending breakpoints and
8992 don't need extra messages. If breakpoint is in bp_shlib_disabled
8993 state, then user already saw the message about that breakpoint
8994 being disabled, and don't want to see more errors. */
8996 && (b->condition_not_parsed
8997 || (b->loc && b->loc->shlib_disabled)
8998 || b->enable_state == bp_disabled))
8999 not_found_and_ok = 1;
9001 if (!not_found_and_ok)
9003 /* We surely don't want to warn about the same breakpoint
9004 10 times. One solution, implemented here, is disable
9005 the breakpoint on error. Another solution would be to
9006 have separate 'warning emitted' flag. Since this
9007 happens only when a binary has changed, I don't know
9008 which approach is better. */
9009 b->enable_state = bp_disabled;
9010 throw_exception (e);
9016 gdb_assert (sals.nelts == 1);
9018 resolve_sal_pc (&sals.sals[0]);
9019 if (b->condition_not_parsed && s && s[0])
9021 char *cond_string = 0;
9025 find_condition_and_thread (s, sals.sals[0].pc,
9026 &cond_string, &thread, &task);
9028 b->cond_string = cond_string;
9031 b->condition_not_parsed = 0;
9034 expanded = expand_line_sal_maybe (sals.sals[0]);
9037 make_cleanup (xfree, sals.sals);
9038 update_breakpoint_locations (b, expanded);
9042 case bp_hardware_watchpoint:
9043 case bp_read_watchpoint:
9044 case bp_access_watchpoint:
9045 /* Watchpoint can be either on expression using entirely global variables,
9046 or it can be on local variables.
9048 Watchpoints of the first kind are never auto-deleted, and even persist
9049 across program restarts. Since they can use variables from shared
9050 libraries, we need to reparse expression as libraries are loaded
9053 Watchpoints on local variables can also change meaning as result
9054 of solib event. For example, if a watchpoint uses both a local and
9055 a global variables in expression, it's a local watchpoint, but
9056 unloading of a shared library will make the expression invalid.
9057 This is not a very common use case, but we still re-evaluate
9058 expression, to avoid surprises to the user.
9060 Note that for local watchpoints, we re-evaluate it only if
9061 watchpoints frame id is still valid. If it's not, it means
9062 the watchpoint is out of scope and will be deleted soon. In fact,
9063 I'm not sure we'll ever be called in this case.
9065 If a local watchpoint's frame id is still valid, then
9066 b->exp_valid_block is likewise valid, and we can safely use it.
9068 Don't do anything about disabled watchpoints, since they will
9069 be reevaluated again when enabled. */
9070 update_watchpoint (b, 1 /* reparse */);
9072 /* We needn't really do anything to reset these, since the mask
9073 that requests them is unaffected by e.g., new libraries being
9079 printf_filtered (_("Deleting unknown breakpoint type %d\n"), b->type);
9081 /* Delete overlay event and longjmp master breakpoints; they will be
9082 reset later by breakpoint_re_set. */
9083 case bp_overlay_event:
9084 case bp_longjmp_master:
9085 delete_breakpoint (b);
9088 /* This breakpoint is special, it's set up when the inferior
9089 starts and we really don't want to touch it. */
9090 case bp_shlib_event:
9092 /* Like bp_shlib_event, this breakpoint type is special.
9093 Once it is set up, we do not want to touch it. */
9094 case bp_thread_event:
9096 /* Keep temporary breakpoints, which can be encountered when we step
9097 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
9098 Otherwise these should have been blown away via the cleanup chain
9099 or by breakpoint_init_inferior when we rerun the executable. */
9102 case bp_watchpoint_scope:
9104 case bp_step_resume:
9106 case bp_longjmp_resume:
9111 do_cleanups (cleanups);
9115 /* Re-set all breakpoints after symbols have been re-loaded. */
9117 breakpoint_re_set (void)
9119 struct breakpoint *b, *temp;
9120 enum language save_language;
9121 int save_input_radix;
9122 struct cleanup *old_chain;
9124 save_language = current_language->la_language;
9125 save_input_radix = input_radix;
9126 old_chain = save_current_program_space ();
9128 ALL_BREAKPOINTS_SAFE (b, temp)
9130 /* Format possible error msg */
9131 char *message = xstrprintf ("Error in re-setting breakpoint %d: ",
9133 struct cleanup *cleanups = make_cleanup (xfree, message);
9134 catch_errors (breakpoint_re_set_one, b, message, RETURN_MASK_ALL);
9135 do_cleanups (cleanups);
9137 set_language (save_language);
9138 input_radix = save_input_radix;
9140 jit_breakpoint_re_set ();
9142 do_cleanups (old_chain);
9144 create_overlay_event_breakpoint ("_ovly_debug_event");
9145 create_longjmp_master_breakpoint ("longjmp");
9146 create_longjmp_master_breakpoint ("_longjmp");
9147 create_longjmp_master_breakpoint ("siglongjmp");
9148 create_longjmp_master_breakpoint ("_siglongjmp");
9151 /* Reset the thread number of this breakpoint:
9153 - If the breakpoint is for all threads, leave it as-is.
9154 - Else, reset it to the current thread for inferior_ptid. */
9156 breakpoint_re_set_thread (struct breakpoint *b)
9158 if (b->thread != -1)
9160 if (in_thread_list (inferior_ptid))
9161 b->thread = pid_to_thread_id (inferior_ptid);
9163 /* We're being called after following a fork. The new fork is
9164 selected as current, and unless this was a vfork will have a
9165 different program space from the original thread. Reset that
9167 b->loc->pspace = current_program_space;
9171 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
9172 If from_tty is nonzero, it prints a message to that effect,
9173 which ends with a period (no newline). */
9176 set_ignore_count (int bptnum, int count, int from_tty)
9178 struct breakpoint *b;
9184 if (b->number == bptnum)
9186 b->ignore_count = count;
9190 printf_filtered (_("Will stop next time breakpoint %d is reached."),
9192 else if (count == 1)
9193 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
9196 printf_filtered (_("Will ignore next %d crossings of breakpoint %d."),
9199 breakpoints_changed ();
9200 observer_notify_breakpoint_modified (b->number);
9204 error (_("No breakpoint number %d."), bptnum);
9208 make_breakpoint_silent (struct breakpoint *b)
9210 /* Silence the breakpoint. */
9214 /* Command to set ignore-count of breakpoint N to COUNT. */
9217 ignore_command (char *args, int from_tty)
9223 error_no_arg (_("a breakpoint number"));
9225 num = get_number (&p);
9227 error (_("bad breakpoint number: '%s'"), args);
9229 error (_("Second argument (specified ignore-count) is missing."));
9231 set_ignore_count (num,
9232 longest_to_int (value_as_long (parse_and_eval (p))),
9235 printf_filtered ("\n");
9238 /* Call FUNCTION on each of the breakpoints
9239 whose numbers are given in ARGS. */
9242 map_breakpoint_numbers (char *args, void (*function) (struct breakpoint *))
9247 struct breakpoint *b, *tmp;
9251 error_no_arg (_("one or more breakpoint numbers"));
9258 num = get_number_or_range (&p1);
9261 warning (_("bad breakpoint number at or near '%s'"), p);
9265 ALL_BREAKPOINTS_SAFE (b, tmp)
9266 if (b->number == num)
9268 struct breakpoint *related_breakpoint = b->related_breakpoint;
9271 if (related_breakpoint)
9272 function (related_breakpoint);
9276 printf_unfiltered (_("No breakpoint number %d.\n"), num);
9282 static struct bp_location *
9283 find_location_by_number (char *number)
9285 char *dot = strchr (number, '.');
9289 struct breakpoint *b;
9290 struct bp_location *loc;
9295 bp_num = get_number_or_range (&p1);
9297 error (_("Bad breakpoint number '%s'"), number);
9300 if (b->number == bp_num)
9305 if (!b || b->number != bp_num)
9306 error (_("Bad breakpoint number '%s'"), number);
9309 loc_num = get_number_or_range (&p1);
9311 error (_("Bad breakpoint location number '%s'"), number);
9315 for (;loc_num && loc; --loc_num, loc = loc->next)
9318 error (_("Bad breakpoint location number '%s'"), dot+1);
9324 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
9325 If from_tty is nonzero, it prints a message to that effect,
9326 which ends with a period (no newline). */
9329 disable_breakpoint (struct breakpoint *bpt)
9331 /* Never disable a watchpoint scope breakpoint; we want to
9332 hit them when we leave scope so we can delete both the
9333 watchpoint and its scope breakpoint at that time. */
9334 if (bpt->type == bp_watchpoint_scope)
9337 /* You can't disable permanent breakpoints. */
9338 if (bpt->enable_state == bp_permanent)
9341 bpt->enable_state = bp_disabled;
9343 update_global_location_list (0);
9345 observer_notify_breakpoint_modified (bpt->number);
9349 disable_command (char *args, int from_tty)
9351 struct breakpoint *bpt;
9353 ALL_BREAKPOINTS (bpt)
9357 warning (_("attempted to disable apparently deleted breakpoint #%d?"),
9363 case bp_hardware_breakpoint:
9365 case bp_hardware_watchpoint:
9366 case bp_read_watchpoint:
9367 case bp_access_watchpoint:
9368 disable_breakpoint (bpt);
9372 else if (strchr (args, '.'))
9374 struct bp_location *loc = find_location_by_number (args);
9377 update_global_location_list (0);
9380 map_breakpoint_numbers (args, disable_breakpoint);
9384 do_enable_breakpoint (struct breakpoint *bpt, enum bpdisp disposition)
9386 int target_resources_ok, other_type_used;
9389 if (bpt->type == bp_hardware_breakpoint)
9392 i = hw_breakpoint_used_count ();
9393 target_resources_ok =
9394 target_can_use_hardware_watchpoint (bp_hardware_breakpoint,
9396 if (target_resources_ok == 0)
9397 error (_("No hardware breakpoint support in the target."));
9398 else if (target_resources_ok < 0)
9399 error (_("Hardware breakpoints used exceeds limit."));
9402 if (bpt->type == bp_watchpoint
9403 || bpt->type == bp_hardware_watchpoint
9404 || bpt->type == bp_read_watchpoint
9405 || bpt->type == bp_access_watchpoint)
9407 struct gdb_exception e;
9409 TRY_CATCH (e, RETURN_MASK_ALL)
9411 update_watchpoint (bpt, 1 /* reparse */);
9415 exception_fprintf (gdb_stderr, e, _("Cannot enable watchpoint %d: "),
9421 if (bpt->enable_state != bp_permanent)
9422 bpt->enable_state = bp_enabled;
9423 bpt->disposition = disposition;
9424 update_global_location_list (1);
9425 breakpoints_changed ();
9427 observer_notify_breakpoint_modified (bpt->number);
9432 enable_breakpoint (struct breakpoint *bpt)
9434 do_enable_breakpoint (bpt, bpt->disposition);
9437 /* The enable command enables the specified breakpoints (or all defined
9438 breakpoints) so they once again become (or continue to be) effective
9439 in stopping the inferior. */
9442 enable_command (char *args, int from_tty)
9444 struct breakpoint *bpt;
9446 ALL_BREAKPOINTS (bpt)
9450 warning (_("attempted to enable apparently deleted breakpoint #%d?"),
9456 case bp_hardware_breakpoint:
9458 case bp_hardware_watchpoint:
9459 case bp_read_watchpoint:
9460 case bp_access_watchpoint:
9461 enable_breakpoint (bpt);
9465 else if (strchr (args, '.'))
9467 struct bp_location *loc = find_location_by_number (args);
9470 update_global_location_list (1);
9473 map_breakpoint_numbers (args, enable_breakpoint);
9477 enable_once_breakpoint (struct breakpoint *bpt)
9479 do_enable_breakpoint (bpt, disp_disable);
9483 enable_once_command (char *args, int from_tty)
9485 map_breakpoint_numbers (args, enable_once_breakpoint);
9489 enable_delete_breakpoint (struct breakpoint *bpt)
9491 do_enable_breakpoint (bpt, disp_del);
9495 enable_delete_command (char *args, int from_tty)
9497 map_breakpoint_numbers (args, enable_delete_breakpoint);
9501 set_breakpoint_cmd (char *args, int from_tty)
9506 show_breakpoint_cmd (char *args, int from_tty)
9510 /* Invalidate last known value of any hardware watchpoint if
9511 the memory which that value represents has been written to by
9515 invalidate_bp_value_on_memory_change (CORE_ADDR addr, int len,
9516 const bfd_byte *data)
9518 struct breakpoint *bp;
9520 ALL_BREAKPOINTS (bp)
9521 if (bp->enable_state == bp_enabled
9522 && bp->type == bp_hardware_watchpoint
9523 && bp->val_valid && bp->val)
9525 struct bp_location *loc;
9527 for (loc = bp->loc; loc != NULL; loc = loc->next)
9528 if (loc->loc_type == bp_loc_hardware_watchpoint
9529 && loc->address + loc->length > addr
9530 && addr + len > loc->address)
9532 value_free (bp->val);
9539 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
9541 struct symtabs_and_lines
9542 decode_line_spec_1 (char *string, int funfirstline)
9544 struct symtabs_and_lines sals;
9546 error (_("Empty line specification."));
9547 if (default_breakpoint_valid)
9548 sals = decode_line_1 (&string, funfirstline,
9549 default_breakpoint_symtab,
9550 default_breakpoint_line,
9551 (char ***) NULL, NULL);
9553 sals = decode_line_1 (&string, funfirstline,
9554 (struct symtab *) NULL, 0, (char ***) NULL, NULL);
9556 error (_("Junk at end of line specification: %s"), string);
9560 /* Create and insert a raw software breakpoint at PC. Return an
9561 identifier, which should be used to remove the breakpoint later.
9562 In general, places which call this should be using something on the
9563 breakpoint chain instead; this function should be eliminated
9567 deprecated_insert_raw_breakpoint (struct gdbarch *gdbarch,
9568 struct address_space *aspace, CORE_ADDR pc)
9570 struct bp_target_info *bp_tgt;
9572 bp_tgt = XZALLOC (struct bp_target_info);
9574 bp_tgt->placed_address_space = aspace;
9575 bp_tgt->placed_address = pc;
9577 if (target_insert_breakpoint (gdbarch, bp_tgt) != 0)
9579 /* Could not insert the breakpoint. */
9587 /* Remove a breakpoint BP inserted by deprecated_insert_raw_breakpoint. */
9590 deprecated_remove_raw_breakpoint (struct gdbarch *gdbarch, void *bp)
9592 struct bp_target_info *bp_tgt = bp;
9595 ret = target_remove_breakpoint (gdbarch, bp_tgt);
9601 /* One (or perhaps two) breakpoints used for software single stepping. */
9603 static void *single_step_breakpoints[2];
9604 static struct gdbarch *single_step_gdbarch[2];
9606 /* Create and insert a breakpoint for software single step. */
9609 insert_single_step_breakpoint (struct gdbarch *gdbarch,
9610 struct address_space *aspace, CORE_ADDR next_pc)
9614 if (single_step_breakpoints[0] == NULL)
9616 bpt_p = &single_step_breakpoints[0];
9617 single_step_gdbarch[0] = gdbarch;
9621 gdb_assert (single_step_breakpoints[1] == NULL);
9622 bpt_p = &single_step_breakpoints[1];
9623 single_step_gdbarch[1] = gdbarch;
9626 /* NOTE drow/2006-04-11: A future improvement to this function would be
9627 to only create the breakpoints once, and actually put them on the
9628 breakpoint chain. That would let us use set_raw_breakpoint. We could
9629 adjust the addresses each time they were needed. Doing this requires
9630 corresponding changes elsewhere where single step breakpoints are
9631 handled, however. So, for now, we use this. */
9633 *bpt_p = deprecated_insert_raw_breakpoint (gdbarch, aspace, next_pc);
9635 error (_("Could not insert single-step breakpoint at %s"),
9636 paddress (gdbarch, next_pc));
9639 /* Remove and delete any breakpoints used for software single step. */
9642 remove_single_step_breakpoints (void)
9644 gdb_assert (single_step_breakpoints[0] != NULL);
9646 /* See insert_single_step_breakpoint for more about this deprecated
9648 deprecated_remove_raw_breakpoint (single_step_gdbarch[0],
9649 single_step_breakpoints[0]);
9650 single_step_gdbarch[0] = NULL;
9651 single_step_breakpoints[0] = NULL;
9653 if (single_step_breakpoints[1] != NULL)
9655 deprecated_remove_raw_breakpoint (single_step_gdbarch[1],
9656 single_step_breakpoints[1]);
9657 single_step_gdbarch[1] = NULL;
9658 single_step_breakpoints[1] = NULL;
9662 /* Check whether a software single-step breakpoint is inserted at PC. */
9665 single_step_breakpoint_inserted_here_p (struct address_space *aspace, CORE_ADDR pc)
9669 for (i = 0; i < 2; i++)
9671 struct bp_target_info *bp_tgt = single_step_breakpoints[i];
9673 && breakpoint_address_match (bp_tgt->placed_address_space,
9674 bp_tgt->placed_address,
9682 /* Returns 0 if 'bp' is NOT a syscall catchpoint,
9683 non-zero otherwise. */
9685 is_syscall_catchpoint_enabled (struct breakpoint *bp)
9687 if (syscall_catchpoint_p (bp)
9688 && bp->enable_state != bp_disabled
9689 && bp->enable_state != bp_call_disabled)
9696 catch_syscall_enabled (void)
9698 struct inferior *inf = current_inferior ();
9700 return inf->total_syscalls_count != 0;
9704 catching_syscall_number (int syscall_number)
9706 struct breakpoint *bp;
9708 ALL_BREAKPOINTS (bp)
9709 if (is_syscall_catchpoint_enabled (bp))
9711 if (bp->syscalls_to_be_caught)
9715 VEC_iterate (int, bp->syscalls_to_be_caught, i, iter);
9717 if (syscall_number == iter)
9727 /* Complete syscall names. Used by "catch syscall". */
9729 catch_syscall_completer (struct cmd_list_element *cmd,
9730 char *text, char *word)
9732 const char **list = get_syscall_names ();
9733 return (list == NULL) ? NULL : complete_on_enum (list, text, word);
9736 /* Tracepoint-specific operations. */
9738 /* Set tracepoint count to NUM. */
9740 set_tracepoint_count (int num)
9742 tracepoint_count = num;
9743 set_internalvar_integer (lookup_internalvar ("tpnum"), num);
9747 trace_command (char *arg, int from_tty)
9749 break_command_really (get_current_arch (),
9751 NULL, 0, 1 /* parse arg */,
9752 0 /* tempflag */, 0 /* hardwareflag */,
9754 0 /* Ignore count */,
9755 pending_break_support,
9759 set_tracepoint_count (breakpoint_count);
9762 /* Print information on tracepoint number TPNUM_EXP, or all if
9766 tracepoints_info (char *tpnum_exp, int from_tty)
9768 struct breakpoint *b;
9769 int tps_to_list = 0;
9771 /* In the no-arguments case, say "No tracepoints" if none found. */
9784 ui_out_message (uiout, 0, "No tracepoints.\n");
9789 /* Otherwise be the same as "info break". */
9790 breakpoints_info (tpnum_exp, from_tty);
9793 /* The 'enable trace' command enables tracepoints.
9794 Not supported by all targets. */
9796 enable_trace_command (char *args, int from_tty)
9798 enable_command (args, from_tty);
9801 /* The 'disable trace' command disables tracepoints.
9802 Not supported by all targets. */
9804 disable_trace_command (char *args, int from_tty)
9806 disable_command (args, from_tty);
9809 /* Remove a tracepoint (or all if no argument) */
9811 delete_trace_command (char *arg, int from_tty)
9813 struct breakpoint *b, *temp;
9819 int breaks_to_delete = 0;
9821 /* Delete all breakpoints if no argument.
9822 Do not delete internal or call-dummy breakpoints, these
9823 have to be deleted with an explicit breakpoint number argument. */
9828 breaks_to_delete = 1;
9833 /* Ask user only if there are some breakpoints to delete. */
9835 || (breaks_to_delete && query (_("Delete all tracepoints? "))))
9837 ALL_BREAKPOINTS_SAFE (b, temp)
9839 if (b->type == bp_tracepoint
9841 delete_breakpoint (b);
9846 map_breakpoint_numbers (arg, delete_breakpoint);
9849 /* Set passcount for tracepoint.
9851 First command argument is passcount, second is tracepoint number.
9852 If tracepoint number omitted, apply to most recently defined.
9853 Also accepts special argument "all". */
9856 trace_pass_command (char *args, int from_tty)
9858 struct breakpoint *t1 = (struct breakpoint *) -1, *t2;
9862 if (args == 0 || *args == 0)
9863 error (_("passcount command requires an argument (count + optional TP num)"));
9865 count = strtoul (args, &args, 10); /* Count comes first, then TP num. */
9867 while (*args && isspace ((int) *args))
9870 if (*args && strncasecmp (args, "all", 3) == 0)
9872 args += 3; /* Skip special argument "all". */
9875 error (_("Junk at end of arguments."));
9878 t1 = get_tracepoint_by_number (&args, 1, 1);
9884 ALL_TRACEPOINTS (t2)
9885 if (t1 == (struct breakpoint *) -1 || t1 == t2)
9887 t2->pass_count = count;
9888 observer_notify_tracepoint_modified (t2->number);
9890 printf_filtered (_("Setting tracepoint %d's passcount to %d\n"),
9894 t1 = get_tracepoint_by_number (&args, 1, 0);
9901 get_tracepoint (int num)
9903 struct breakpoint *t;
9906 if (t->number == num)
9912 /* Utility: parse a tracepoint number and look it up in the list.
9913 If MULTI_P is true, there might be a range of tracepoints in ARG.
9914 if OPTIONAL_P is true, then if the argument is missing, the most
9915 recent tracepoint (tracepoint_count) is returned. */
9917 get_tracepoint_by_number (char **arg, int multi_p, int optional_p)
9919 extern int tracepoint_count;
9920 struct breakpoint *t;
9922 char *instring = arg == NULL ? NULL : *arg;
9924 if (arg == NULL || *arg == NULL || ! **arg)
9927 tpnum = tracepoint_count;
9929 error_no_arg (_("tracepoint number"));
9932 tpnum = multi_p ? get_number_or_range (arg) : get_number (arg);
9936 if (instring && *instring)
9937 printf_filtered (_("bad tracepoint number at or near '%s'\n"),
9940 printf_filtered (_("Tracepoint argument missing and no previous tracepoint\n"));
9945 if (t->number == tpnum)
9950 /* FIXME: if we are in the middle of a range we don't want to give
9951 a message. The current interface to get_number_or_range doesn't
9952 allow us to discover this. */
9953 printf_unfiltered ("No tracepoint number %d.\n", tpnum);
9957 /* save-tracepoints command */
9959 tracepoint_save_command (char *args, int from_tty)
9961 struct breakpoint *tp;
9963 struct action_line *line;
9965 char *i1 = " ", *i2 = " ";
9966 char *indent, *actionline, *pathname;
9968 struct cleanup *cleanup;
9970 if (args == 0 || *args == 0)
9971 error (_("Argument required (file name in which to save tracepoints)"));
9973 /* See if we have anything to save. */
9974 ALL_TRACEPOINTS (tp)
9981 warning (_("save-tracepoints: no tracepoints to save."));
9985 pathname = tilde_expand (args);
9986 cleanup = make_cleanup (xfree, pathname);
9987 fp = fopen (pathname, "w");
9989 error (_("Unable to open file '%s' for saving tracepoints (%s)"),
9990 args, safe_strerror (errno));
9991 make_cleanup_fclose (fp);
9993 ALL_TRACEPOINTS (tp)
9995 if (tp->addr_string)
9996 fprintf (fp, "trace %s\n", tp->addr_string);
9999 sprintf_vma (tmp, tp->loc->address);
10000 fprintf (fp, "trace *0x%s\n", tmp);
10003 if (tp->pass_count)
10004 fprintf (fp, " passcount %d\n", tp->pass_count);
10008 fprintf (fp, " actions\n");
10010 for (line = tp->actions; line; line = line->next)
10012 struct cmd_list_element *cmd;
10014 QUIT; /* allow user to bail out with ^C */
10015 actionline = line->action;
10016 while (isspace ((int) *actionline))
10019 fprintf (fp, "%s%s\n", indent, actionline);
10020 if (*actionline != '#') /* skip for comment lines */
10022 cmd = lookup_cmd (&actionline, cmdlist, "", -1, 1);
10024 error (_("Bad action list item: %s"), actionline);
10025 if (cmd_cfunc_eq (cmd, while_stepping_pseudocommand))
10027 else if (cmd_cfunc_eq (cmd, end_actions_pseudocommand))
10033 do_cleanups (cleanup);
10035 printf_filtered (_("Tracepoints saved to file '%s'.\n"), args);
10039 /* Create a vector of all tracepoints. */
10041 VEC(breakpoint_p) *
10044 VEC(breakpoint_p) *tp_vec = 0;
10045 struct breakpoint *tp;
10047 ALL_TRACEPOINTS (tp)
10049 VEC_safe_push (breakpoint_p, tp_vec, tp);
10056 /* This help string is used for the break, hbreak, tbreak and thbreak commands.
10057 It is defined as a macro to prevent duplication.
10058 COMMAND should be a string constant containing the name of the command. */
10059 #define BREAK_ARGS_HELP(command) \
10060 command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\
10061 LOCATION may be a line number, function name, or \"*\" and an address.\n\
10062 If a line number is specified, break at start of code for that line.\n\
10063 If a function is specified, break at start of code for that function.\n\
10064 If an address is specified, break at that exact address.\n\
10065 With no LOCATION, uses current execution address of selected stack frame.\n\
10066 This is useful for breaking on return to a stack frame.\n\
10068 THREADNUM is the number from \"info threads\".\n\
10069 CONDITION is a boolean expression.\n\
10071 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
10073 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
10075 /* List of subcommands for "catch". */
10076 static struct cmd_list_element *catch_cmdlist;
10078 /* List of subcommands for "tcatch". */
10079 static struct cmd_list_element *tcatch_cmdlist;
10081 /* Like add_cmd, but add the command to both the "catch" and "tcatch"
10082 lists, and pass some additional user data to the command function. */
10084 add_catch_command (char *name, char *docstring,
10085 void (*sfunc) (char *args, int from_tty,
10086 struct cmd_list_element *command),
10087 char **(*completer) (struct cmd_list_element *cmd,
10088 char *text, char *word),
10089 void *user_data_catch,
10090 void *user_data_tcatch)
10092 struct cmd_list_element *command;
10094 command = add_cmd (name, class_breakpoint, NULL, docstring,
10096 set_cmd_sfunc (command, sfunc);
10097 set_cmd_context (command, user_data_catch);
10098 set_cmd_completer (command, completer);
10100 command = add_cmd (name, class_breakpoint, NULL, docstring,
10102 set_cmd_sfunc (command, sfunc);
10103 set_cmd_context (command, user_data_tcatch);
10104 set_cmd_completer (command, completer);
10108 clear_syscall_counts (int pid)
10110 struct inferior *inf = find_inferior_pid (pid);
10112 inf->total_syscalls_count = 0;
10113 inf->any_syscall_count = 0;
10114 VEC_free (int, inf->syscalls_counts);
10118 _initialize_breakpoint (void)
10120 static struct cmd_list_element *breakpoint_set_cmdlist;
10121 static struct cmd_list_element *breakpoint_show_cmdlist;
10122 struct cmd_list_element *c;
10124 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib);
10125 observer_attach_inferior_exit (clear_syscall_counts);
10126 observer_attach_memory_changed (invalidate_bp_value_on_memory_change);
10128 breakpoint_chain = 0;
10129 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
10130 before a breakpoint is set. */
10131 breakpoint_count = 0;
10133 tracepoint_count = 0;
10135 add_com ("ignore", class_breakpoint, ignore_command, _("\
10136 Set ignore-count of breakpoint number N to COUNT.\n\
10137 Usage is `ignore N COUNT'."));
10139 add_com_alias ("bc", "ignore", class_breakpoint, 1);
10141 add_com ("commands", class_breakpoint, commands_command, _("\
10142 Set commands to be executed when a breakpoint is hit.\n\
10143 Give breakpoint number as argument after \"commands\".\n\
10144 With no argument, the targeted breakpoint is the last one set.\n\
10145 The commands themselves follow starting on the next line.\n\
10146 Type a line containing \"end\" to indicate the end of them.\n\
10147 Give \"silent\" as the first line to make the breakpoint silent;\n\
10148 then no output is printed when it is hit, except what the commands print."));
10150 add_com ("condition", class_breakpoint, condition_command, _("\
10151 Specify breakpoint number N to break only if COND is true.\n\
10152 Usage is `condition N COND', where N is an integer and COND is an\n\
10153 expression to be evaluated whenever breakpoint N is reached."));
10155 c = add_com ("tbreak", class_breakpoint, tbreak_command, _("\
10156 Set a temporary breakpoint.\n\
10157 Like \"break\" except the breakpoint is only temporary,\n\
10158 so it will be deleted when hit. Equivalent to \"break\" followed\n\
10159 by using \"enable delete\" on the breakpoint number.\n\
10161 BREAK_ARGS_HELP ("tbreak")));
10162 set_cmd_completer (c, location_completer);
10164 c = add_com ("hbreak", class_breakpoint, hbreak_command, _("\
10165 Set a hardware assisted breakpoint.\n\
10166 Like \"break\" except the breakpoint requires hardware support,\n\
10167 some target hardware may not have this support.\n\
10169 BREAK_ARGS_HELP ("hbreak")));
10170 set_cmd_completer (c, location_completer);
10172 c = add_com ("thbreak", class_breakpoint, thbreak_command, _("\
10173 Set a temporary hardware assisted breakpoint.\n\
10174 Like \"hbreak\" except the breakpoint is only temporary,\n\
10175 so it will be deleted when hit.\n\
10177 BREAK_ARGS_HELP ("thbreak")));
10178 set_cmd_completer (c, location_completer);
10180 add_prefix_cmd ("enable", class_breakpoint, enable_command, _("\
10181 Enable some breakpoints.\n\
10182 Give breakpoint numbers (separated by spaces) as arguments.\n\
10183 With no subcommand, breakpoints are enabled until you command otherwise.\n\
10184 This is used to cancel the effect of the \"disable\" command.\n\
10185 With a subcommand you can enable temporarily."),
10186 &enablelist, "enable ", 1, &cmdlist);
10188 add_com ("ab", class_breakpoint, enable_command, _("\
10189 Enable some breakpoints.\n\
10190 Give breakpoint numbers (separated by spaces) as arguments.\n\
10191 With no subcommand, breakpoints are enabled until you command otherwise.\n\
10192 This is used to cancel the effect of the \"disable\" command.\n\
10193 With a subcommand you can enable temporarily."));
10195 add_com_alias ("en", "enable", class_breakpoint, 1);
10197 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command, _("\
10198 Enable some breakpoints.\n\
10199 Give breakpoint numbers (separated by spaces) as arguments.\n\
10200 This is used to cancel the effect of the \"disable\" command.\n\
10201 May be abbreviated to simply \"enable\".\n"),
10202 &enablebreaklist, "enable breakpoints ", 1, &enablelist);
10204 add_cmd ("once", no_class, enable_once_command, _("\
10205 Enable breakpoints for one hit. Give breakpoint numbers.\n\
10206 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
10209 add_cmd ("delete", no_class, enable_delete_command, _("\
10210 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
10211 If a breakpoint is hit while enabled in this fashion, it is deleted."),
10214 add_cmd ("delete", no_class, enable_delete_command, _("\
10215 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
10216 If a breakpoint is hit while enabled in this fashion, it is deleted."),
10219 add_cmd ("once", no_class, enable_once_command, _("\
10220 Enable breakpoints for one hit. Give breakpoint numbers.\n\
10221 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
10224 add_prefix_cmd ("disable", class_breakpoint, disable_command, _("\
10225 Disable some breakpoints.\n\
10226 Arguments are breakpoint numbers with spaces in between.\n\
10227 To disable all breakpoints, give no argument.\n\
10228 A disabled breakpoint is not forgotten, but has no effect until reenabled."),
10229 &disablelist, "disable ", 1, &cmdlist);
10230 add_com_alias ("dis", "disable", class_breakpoint, 1);
10231 add_com_alias ("disa", "disable", class_breakpoint, 1);
10233 add_com ("sb", class_breakpoint, disable_command, _("\
10234 Disable some breakpoints.\n\
10235 Arguments are breakpoint numbers with spaces in between.\n\
10236 To disable all breakpoints, give no argument.\n\
10237 A disabled breakpoint is not forgotten, but has no effect until reenabled."));
10239 add_cmd ("breakpoints", class_alias, disable_command, _("\
10240 Disable some breakpoints.\n\
10241 Arguments are breakpoint numbers with spaces in between.\n\
10242 To disable all breakpoints, give no argument.\n\
10243 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
10244 This command may be abbreviated \"disable\"."),
10247 add_prefix_cmd ("delete", class_breakpoint, delete_command, _("\
10248 Delete some breakpoints or auto-display expressions.\n\
10249 Arguments are breakpoint numbers with spaces in between.\n\
10250 To delete all breakpoints, give no argument.\n\
10252 Also a prefix command for deletion of other GDB objects.\n\
10253 The \"unset\" command is also an alias for \"delete\"."),
10254 &deletelist, "delete ", 1, &cmdlist);
10255 add_com_alias ("d", "delete", class_breakpoint, 1);
10256 add_com_alias ("del", "delete", class_breakpoint, 1);
10258 add_com ("db", class_breakpoint, delete_command, _("\
10259 Delete some breakpoints.\n\
10260 Arguments are breakpoint numbers with spaces in between.\n\
10261 To delete all breakpoints, give no argument.\n"));
10263 add_cmd ("breakpoints", class_alias, delete_command, _("\
10264 Delete some breakpoints or auto-display expressions.\n\
10265 Arguments are breakpoint numbers with spaces in between.\n\
10266 To delete all breakpoints, give no argument.\n\
10267 This command may be abbreviated \"delete\"."),
10270 add_com ("clear", class_breakpoint, clear_command, _("\
10271 Clear breakpoint at specified line or function.\n\
10272 Argument may be line number, function name, or \"*\" and an address.\n\
10273 If line number is specified, all breakpoints in that line are cleared.\n\
10274 If function is specified, breakpoints at beginning of function are cleared.\n\
10275 If an address is specified, breakpoints at that address are cleared.\n\
10277 With no argument, clears all breakpoints in the line that the selected frame\n\
10278 is executing in.\n\
10280 See also the \"delete\" command which clears breakpoints by number."));
10282 c = add_com ("break", class_breakpoint, break_command, _("\
10283 Set breakpoint at specified line or function.\n"
10284 BREAK_ARGS_HELP ("break")));
10285 set_cmd_completer (c, location_completer);
10287 add_com_alias ("b", "break", class_run, 1);
10288 add_com_alias ("br", "break", class_run, 1);
10289 add_com_alias ("bre", "break", class_run, 1);
10290 add_com_alias ("brea", "break", class_run, 1);
10293 add_com_alias ("ba", "break", class_breakpoint, 1);
10297 add_abbrev_prefix_cmd ("stop", class_breakpoint, stop_command, _("\
10298 Break in function/address or break at a line in the current file."),
10299 &stoplist, "stop ", 1, &cmdlist);
10300 add_cmd ("in", class_breakpoint, stopin_command,
10301 _("Break in function or address."), &stoplist);
10302 add_cmd ("at", class_breakpoint, stopat_command,
10303 _("Break at a line in the current file."), &stoplist);
10304 add_com ("status", class_info, breakpoints_info, _("\
10305 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
10306 The \"Type\" column indicates one of:\n\
10307 \tbreakpoint - normal breakpoint\n\
10308 \twatchpoint - watchpoint\n\
10309 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
10310 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
10311 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
10312 address and file/line number respectively.\n\
10314 Convenience variable \"$_\" and default examine address for \"x\"\n\
10315 are set to the address of the last breakpoint listed unless the command\n\
10316 is prefixed with \"server \".\n\n\
10317 Convenience variable \"$bpnum\" contains the number of the last\n\
10318 breakpoint set."));
10321 add_info ("breakpoints", breakpoints_info, _("\
10322 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
10323 The \"Type\" column indicates one of:\n\
10324 \tbreakpoint - normal breakpoint\n\
10325 \twatchpoint - watchpoint\n\
10326 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
10327 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
10328 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
10329 address and file/line number respectively.\n\
10331 Convenience variable \"$_\" and default examine address for \"x\"\n\
10332 are set to the address of the last breakpoint listed unless the command\n\
10333 is prefixed with \"server \".\n\n\
10334 Convenience variable \"$bpnum\" contains the number of the last\n\
10335 breakpoint set."));
10337 add_info_alias ("b", "breakpoints", 1);
10340 add_com ("lb", class_breakpoint, breakpoints_info, _("\
10341 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
10342 The \"Type\" column indicates one of:\n\
10343 \tbreakpoint - normal breakpoint\n\
10344 \twatchpoint - watchpoint\n\
10345 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
10346 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
10347 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
10348 address and file/line number respectively.\n\
10350 Convenience variable \"$_\" and default examine address for \"x\"\n\
10351 are set to the address of the last breakpoint listed unless the command\n\
10352 is prefixed with \"server \".\n\n\
10353 Convenience variable \"$bpnum\" contains the number of the last\n\
10354 breakpoint set."));
10356 add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints, _("\
10357 Status of all breakpoints, or breakpoint number NUMBER.\n\
10358 The \"Type\" column indicates one of:\n\
10359 \tbreakpoint - normal breakpoint\n\
10360 \twatchpoint - watchpoint\n\
10361 \tlongjmp - internal breakpoint used to step through longjmp()\n\
10362 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
10363 \tuntil - internal breakpoint used by the \"until\" command\n\
10364 \tfinish - internal breakpoint used by the \"finish\" command\n\
10365 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
10366 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
10367 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
10368 address and file/line number respectively.\n\
10370 Convenience variable \"$_\" and default examine address for \"x\"\n\
10371 are set to the address of the last breakpoint listed unless the command\n\
10372 is prefixed with \"server \".\n\n\
10373 Convenience variable \"$bpnum\" contains the number of the last\n\
10375 &maintenanceinfolist);
10377 add_prefix_cmd ("catch", class_breakpoint, catch_command, _("\
10378 Set catchpoints to catch events."),
10379 &catch_cmdlist, "catch ",
10380 0/*allow-unknown*/, &cmdlist);
10382 add_prefix_cmd ("tcatch", class_breakpoint, tcatch_command, _("\
10383 Set temporary catchpoints to catch events."),
10384 &tcatch_cmdlist, "tcatch ",
10385 0/*allow-unknown*/, &cmdlist);
10387 /* Add catch and tcatch sub-commands. */
10388 add_catch_command ("catch", _("\
10389 Catch an exception, when caught.\n\
10390 With an argument, catch only exceptions with the given name."),
10391 catch_catch_command,
10395 add_catch_command ("throw", _("\
10396 Catch an exception, when thrown.\n\
10397 With an argument, catch only exceptions with the given name."),
10398 catch_throw_command,
10402 add_catch_command ("fork", _("Catch calls to fork."),
10403 catch_fork_command_1,
10405 (void *) (uintptr_t) catch_fork_permanent,
10406 (void *) (uintptr_t) catch_fork_temporary);
10407 add_catch_command ("vfork", _("Catch calls to vfork."),
10408 catch_fork_command_1,
10410 (void *) (uintptr_t) catch_vfork_permanent,
10411 (void *) (uintptr_t) catch_vfork_temporary);
10412 add_catch_command ("exec", _("Catch calls to exec."),
10413 catch_exec_command_1,
10417 add_catch_command ("syscall", _("\
10418 Catch system calls by their names and/or numbers.\n\
10419 Arguments say which system calls to catch. If no arguments\n\
10420 are given, every system call will be caught.\n\
10421 Arguments, if given, should be one or more system call names\n\
10422 (if your system supports that), or system call numbers."),
10423 catch_syscall_command_1,
10424 catch_syscall_completer,
10427 add_catch_command ("exception", _("\
10428 Catch Ada exceptions, when raised.\n\
10429 With an argument, catch only exceptions with the given name."),
10430 catch_ada_exception_command,
10434 add_catch_command ("assert", _("\
10435 Catch failed Ada assertions, when raised.\n\
10436 With an argument, catch only exceptions with the given name."),
10437 catch_assert_command,
10442 c = add_com ("watch", class_breakpoint, watch_command, _("\
10443 Set a watchpoint for an expression.\n\
10444 A watchpoint stops execution of your program whenever the value of\n\
10445 an expression changes."));
10446 set_cmd_completer (c, expression_completer);
10448 c = add_com ("rwatch", class_breakpoint, rwatch_command, _("\
10449 Set a read watchpoint for an expression.\n\
10450 A watchpoint stops execution of your program whenever the value of\n\
10451 an expression is read."));
10452 set_cmd_completer (c, expression_completer);
10454 c = add_com ("awatch", class_breakpoint, awatch_command, _("\
10455 Set a watchpoint for an expression.\n\
10456 A watchpoint stops execution of your program whenever the value of\n\
10457 an expression is either read or written."));
10458 set_cmd_completer (c, expression_completer);
10460 add_info ("watchpoints", breakpoints_info,
10461 _("Synonym for ``info breakpoints''."));
10464 /* XXX: cagney/2005-02-23: This should be a boolean, and should
10465 respond to changes - contrary to the description. */
10466 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support,
10467 &can_use_hw_watchpoints, _("\
10468 Set debugger's willingness to use watchpoint hardware."), _("\
10469 Show debugger's willingness to use watchpoint hardware."), _("\
10470 If zero, gdb will not use hardware for new watchpoints, even if\n\
10471 such is available. (However, any hardware watchpoints that were\n\
10472 created before setting this to nonzero, will continue to use watchpoint\n\
10475 show_can_use_hw_watchpoints,
10476 &setlist, &showlist);
10478 can_use_hw_watchpoints = 1;
10480 /* Tracepoint manipulation commands. */
10482 c = add_com ("trace", class_breakpoint, trace_command, _("\
10483 Set a tracepoint at specified line or function.\n\
10485 BREAK_ARGS_HELP ("trace") "\n\
10486 Do \"help tracepoints\" for info on other tracepoint commands."));
10487 set_cmd_completer (c, location_completer);
10489 add_com_alias ("tp", "trace", class_alias, 0);
10490 add_com_alias ("tr", "trace", class_alias, 1);
10491 add_com_alias ("tra", "trace", class_alias, 1);
10492 add_com_alias ("trac", "trace", class_alias, 1);
10494 add_info ("tracepoints", tracepoints_info, _("\
10495 Status of tracepoints, or tracepoint number NUMBER.\n\
10496 Convenience variable \"$tpnum\" contains the number of the\n\
10497 last tracepoint set."));
10499 add_info_alias ("tp", "tracepoints", 1);
10501 add_cmd ("tracepoints", class_trace, delete_trace_command, _("\
10502 Delete specified tracepoints.\n\
10503 Arguments are tracepoint numbers, separated by spaces.\n\
10504 No argument means delete all tracepoints."),
10507 c = add_cmd ("tracepoints", class_trace, disable_trace_command, _("\
10508 Disable specified tracepoints.\n\
10509 Arguments are tracepoint numbers, separated by spaces.\n\
10510 No argument means disable all tracepoints."),
10512 deprecate_cmd (c, "disable");
10514 c = add_cmd ("tracepoints", class_trace, enable_trace_command, _("\
10515 Enable specified tracepoints.\n\
10516 Arguments are tracepoint numbers, separated by spaces.\n\
10517 No argument means enable all tracepoints."),
10519 deprecate_cmd (c, "enable");
10521 add_com ("passcount", class_trace, trace_pass_command, _("\
10522 Set the passcount for a tracepoint.\n\
10523 The trace will end when the tracepoint has been passed 'count' times.\n\
10524 Usage: passcount COUNT TPNUM, where TPNUM may also be \"all\";\n\
10525 if TPNUM is omitted, passcount refers to the last tracepoint defined."));
10527 c = add_com ("save-tracepoints", class_trace, tracepoint_save_command, _("\
10528 Save current tracepoint definitions as a script.\n\
10529 Use the 'source' command in another debug session to restore them."));
10530 set_cmd_completer (c, filename_completer);
10532 add_prefix_cmd ("breakpoint", class_maintenance, set_breakpoint_cmd, _("\
10533 Breakpoint specific settings\n\
10534 Configure various breakpoint-specific variables such as\n\
10535 pending breakpoint behavior"),
10536 &breakpoint_set_cmdlist, "set breakpoint ",
10537 0/*allow-unknown*/, &setlist);
10538 add_prefix_cmd ("breakpoint", class_maintenance, show_breakpoint_cmd, _("\
10539 Breakpoint specific settings\n\
10540 Configure various breakpoint-specific variables such as\n\
10541 pending breakpoint behavior"),
10542 &breakpoint_show_cmdlist, "show breakpoint ",
10543 0/*allow-unknown*/, &showlist);
10545 add_setshow_auto_boolean_cmd ("pending", no_class,
10546 &pending_break_support, _("\
10547 Set debugger's behavior regarding pending breakpoints."), _("\
10548 Show debugger's behavior regarding pending breakpoints."), _("\
10549 If on, an unrecognized breakpoint location will cause gdb to create a\n\
10550 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
10551 an error. If auto, an unrecognized breakpoint location results in a\n\
10552 user-query to see if a pending breakpoint should be created."),
10554 show_pending_break_support,
10555 &breakpoint_set_cmdlist,
10556 &breakpoint_show_cmdlist);
10558 pending_break_support = AUTO_BOOLEAN_AUTO;
10560 add_setshow_boolean_cmd ("auto-hw", no_class,
10561 &automatic_hardware_breakpoints, _("\
10562 Set automatic usage of hardware breakpoints."), _("\
10563 Show automatic usage of hardware breakpoints."), _("\
10564 If set, the debugger will automatically use hardware breakpoints for\n\
10565 breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
10566 a warning will be emitted for such breakpoints."),
10568 show_automatic_hardware_breakpoints,
10569 &breakpoint_set_cmdlist,
10570 &breakpoint_show_cmdlist);
10572 add_setshow_enum_cmd ("always-inserted", class_support,
10573 always_inserted_enums, &always_inserted_mode, _("\
10574 Set mode for inserting breakpoints."), _("\
10575 Show mode for inserting breakpoints."), _("\
10576 When this mode is off, breakpoints are inserted in inferior when it is\n\
10577 resumed, and removed when execution stops. When this mode is on,\n\
10578 breakpoints are inserted immediately and removed only when the user\n\
10579 deletes the breakpoint. When this mode is auto (which is the default),\n\
10580 the behaviour depends on the non-stop setting (see help set non-stop).\n\
10581 In this case, if gdb is controlling the inferior in non-stop mode, gdb\n\
10582 behaves as if always-inserted mode is on; if gdb is controlling the\n\
10583 inferior in all-stop mode, gdb behaves as if always-inserted mode is off."),
10585 &show_always_inserted_mode,
10586 &breakpoint_set_cmdlist,
10587 &breakpoint_show_cmdlist);
10589 automatic_hardware_breakpoints = 1;
10591 observer_attach_about_to_proceed (breakpoint_about_to_proceed);