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/>. */
27 #include "breakpoint.h"
28 #include "tracepoint.h"
30 #include "expression.h"
36 #include "gdbthread.h"
39 #include "gdb_string.h"
46 #include "completer.h"
49 #include "cli/cli-script.h"
50 #include "gdb_assert.h"
55 #include "exceptions.h"
62 /* readline include files */
63 #include "readline/readline.h"
64 #include "readline/history.h"
66 /* readline defines this. */
69 #include "mi/mi-common.h"
71 /* Arguments to pass as context to some catch command handlers. */
72 #define CATCH_PERMANENT ((void *) (uintptr_t) 0)
73 #define CATCH_TEMPORARY ((void *) (uintptr_t) 1)
75 /* Prototypes for local functions. */
77 static void enable_delete_command (char *, int);
79 static void enable_delete_breakpoint (struct breakpoint
*);
81 static void enable_once_command (char *, int);
83 static void enable_once_breakpoint (struct breakpoint
*);
85 static void disable_command (char *, int);
87 static void enable_command (char *, int);
89 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
91 static void ignore_command (char *, int);
93 static int breakpoint_re_set_one (void *);
95 static void clear_command (char *, int);
97 static void catch_command (char *, int);
99 static void watch_command (char *, int);
101 static int can_use_hardware_watchpoint (struct value
*);
103 static void break_command_1 (char *, int, int);
105 static void mention (struct breakpoint
*);
107 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
109 static void check_duplicates (struct breakpoint
*);
111 static void breakpoint_adjustment_warning (CORE_ADDR
, CORE_ADDR
, int, int);
113 static CORE_ADDR
adjust_breakpoint_address (CORE_ADDR bpaddr
,
116 static void describe_other_breakpoints (CORE_ADDR
, struct obj_section
*, int);
118 static void breakpoints_info (char *, int);
120 static void breakpoint_1 (int, int);
122 static bpstat
bpstat_alloc (const struct bp_location
*, bpstat
);
124 static int breakpoint_cond_eval (void *);
126 static void cleanup_executing_breakpoints (void *);
128 static void commands_command (char *, int);
130 static void condition_command (char *, int);
132 static int get_number_trailer (char **, int);
134 void set_breakpoint_count (int);
143 static int remove_breakpoint (struct bp_location
*, insertion_state_t
);
145 static enum print_stop_action
print_it_typical (bpstat
);
147 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
149 static int watchpoint_check (void *);
151 static void maintenance_info_breakpoints (char *, int);
153 static int hw_breakpoint_used_count (void);
155 static int hw_watchpoint_used_count (enum bptype
, int *);
157 static void hbreak_command (char *, int);
159 static void thbreak_command (char *, int);
161 static void watch_command_1 (char *, int, int);
163 static void rwatch_command (char *, int);
165 static void awatch_command (char *, int);
167 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
169 static void stop_command (char *arg
, int from_tty
);
171 static void stopin_command (char *arg
, int from_tty
);
173 static void stopat_command (char *arg
, int from_tty
);
175 static char *ep_parse_optional_if_clause (char **arg
);
177 static char *ep_parse_optional_filename (char **arg
);
179 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
180 char *arg
, int tempflag
, int from_tty
);
182 static void tcatch_command (char *arg
, int from_tty
);
184 static void ep_skip_leading_whitespace (char **s
);
186 static int single_step_breakpoint_inserted_here_p (CORE_ADDR pc
);
188 static void free_bp_location (struct bp_location
*loc
);
190 static struct bp_location
*allocate_bp_location (struct breakpoint
*bpt
);
192 static void update_global_location_list (int);
194 static void update_global_location_list_nothrow (int);
196 static int is_hardware_watchpoint (struct breakpoint
*bpt
);
198 static void insert_breakpoint_locations (void);
200 static void tracepoints_info (char *, int);
202 static void delete_trace_command (char *, int);
204 static void enable_trace_command (char *, int);
206 static void disable_trace_command (char *, int);
208 static void trace_pass_command (char *, int);
210 /* Flag indicating that a command has proceeded the inferior past the
211 current breakpoint. */
213 static int breakpoint_proceeded
;
216 bpdisp_text (enum bpdisp disp
)
218 /* NOTE: the following values are a part of MI protocol and represent
219 values of 'disp' field returned when inferior stops at a breakpoint. */
220 static char *bpdisps
[] = {"del", "dstp", "dis", "keep"};
221 return bpdisps
[(int) disp
];
224 /* Prototypes for exported functions. */
225 /* If FALSE, gdb will not use hardware support for watchpoints, even
226 if such is available. */
227 static int can_use_hw_watchpoints
;
230 show_can_use_hw_watchpoints (struct ui_file
*file
, int from_tty
,
231 struct cmd_list_element
*c
,
234 fprintf_filtered (file
, _("\
235 Debugger's willingness to use watchpoint hardware is %s.\n"),
239 /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints.
240 If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints
241 for unrecognized breakpoint locations.
242 If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */
243 static enum auto_boolean pending_break_support
;
245 show_pending_break_support (struct ui_file
*file
, int from_tty
,
246 struct cmd_list_element
*c
,
249 fprintf_filtered (file
, _("\
250 Debugger's behavior regarding pending breakpoints is %s.\n"),
254 /* If 1, gdb will automatically use hardware breakpoints for breakpoints
255 set with "break" but falling in read-only memory.
256 If 0, gdb will warn about such breakpoints, but won't automatically
257 use hardware breakpoints. */
258 static int automatic_hardware_breakpoints
;
260 show_automatic_hardware_breakpoints (struct ui_file
*file
, int from_tty
,
261 struct cmd_list_element
*c
,
264 fprintf_filtered (file
, _("\
265 Automatic usage of hardware breakpoints is %s.\n"),
269 /* If on, gdb will keep breakpoints inserted even as inferior is
270 stopped, and immediately insert any new breakpoints. If off, gdb
271 will insert breakpoints into inferior only when resuming it, and
272 will remove breakpoints upon stop. If auto, GDB will behave as ON
273 if in non-stop mode, and as OFF if all-stop mode.*/
275 static const char always_inserted_auto
[] = "auto";
276 static const char always_inserted_on
[] = "on";
277 static const char always_inserted_off
[] = "off";
278 static const char *always_inserted_enums
[] = {
279 always_inserted_auto
,
284 static const char *always_inserted_mode
= always_inserted_auto
;
286 show_always_inserted_mode (struct ui_file
*file
, int from_tty
,
287 struct cmd_list_element
*c
, const char *value
)
289 if (always_inserted_mode
== always_inserted_auto
)
290 fprintf_filtered (file
, _("\
291 Always inserted breakpoint mode is %s (currently %s).\n"),
293 breakpoints_always_inserted_mode () ? "on" : "off");
295 fprintf_filtered (file
, _("Always inserted breakpoint mode is %s.\n"), value
);
299 breakpoints_always_inserted_mode (void)
301 return (always_inserted_mode
== always_inserted_on
302 || (always_inserted_mode
== always_inserted_auto
&& non_stop
));
305 void _initialize_breakpoint (void);
307 /* Are we executing breakpoint commands? */
308 static int executing_breakpoint_commands
;
310 /* Are overlay event breakpoints enabled? */
311 static int overlay_events_enabled
;
313 /* Walk the following statement or block through all breakpoints.
314 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
317 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
319 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
320 for (B = breakpoint_chain; \
321 B ? (TMP=B->next, 1): 0; \
324 /* Similar iterators for the low-level breakpoints. */
326 #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->global_next)
328 #define ALL_BP_LOCATIONS_SAFE(B,TMP) \
329 for (B = bp_location_chain; \
330 B ? (TMP=B->global_next, 1): 0; \
333 /* Iterator for tracepoints only. */
335 #define ALL_TRACEPOINTS(B) \
336 for (B = breakpoint_chain; B; B = B->next) \
337 if ((B)->type == bp_tracepoint)
339 /* Chains of all breakpoints defined. */
341 struct breakpoint
*breakpoint_chain
;
343 struct bp_location
*bp_location_chain
;
345 /* The locations that no longer correspond to any breakpoint,
346 unlinked from bp_location_chain, but for which a hit
347 may still be reported by a target. */
348 VEC(bp_location_p
) *moribund_locations
= NULL
;
350 /* Number of last breakpoint made. */
352 int breakpoint_count
;
354 /* Number of last tracepoint made. */
356 int tracepoint_count
;
358 /* Return whether a breakpoint is an active enabled breakpoint. */
360 breakpoint_enabled (struct breakpoint
*b
)
362 return (b
->enable_state
== bp_enabled
);
365 /* Set breakpoint count to NUM. */
368 set_breakpoint_count (int num
)
370 breakpoint_count
= num
;
371 set_internalvar_integer (lookup_internalvar ("bpnum"), num
);
374 /* Used in run_command to zero the hit count when a new run starts. */
377 clear_breakpoint_hit_counts (void)
379 struct breakpoint
*b
;
385 /* Default address, symtab and line to put a breakpoint at
386 for "break" command with no arg.
387 if default_breakpoint_valid is zero, the other three are
388 not valid, and "break" with no arg is an error.
390 This set by print_stack_frame, which calls set_default_breakpoint. */
392 int default_breakpoint_valid
;
393 CORE_ADDR default_breakpoint_address
;
394 struct symtab
*default_breakpoint_symtab
;
395 int default_breakpoint_line
;
397 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
398 Advance *PP after the string and any trailing whitespace.
400 Currently the string can either be a number or "$" followed by the name
401 of a convenience variable. Making it an expression wouldn't work well
402 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
404 If the string is a NULL pointer, that denotes the last breakpoint.
406 TRAILER is a character which can be found after the number; most
407 commonly this is `-'. If you don't want a trailer, use \0. */
409 get_number_trailer (char **pp
, int trailer
)
411 int retval
= 0; /* default */
415 /* Empty line means refer to the last breakpoint. */
416 return breakpoint_count
;
419 /* Make a copy of the name, so we can null-terminate it
420 to pass to lookup_internalvar(). */
425 while (isalnum (*p
) || *p
== '_')
427 varname
= (char *) alloca (p
- start
+ 1);
428 strncpy (varname
, start
, p
- start
);
429 varname
[p
- start
] = '\0';
430 if (get_internalvar_integer (lookup_internalvar (varname
), &val
))
434 printf_filtered (_("Convenience variable must have integer value.\n"));
442 while (*p
>= '0' && *p
<= '9')
445 /* There is no number here. (e.g. "cond a == b"). */
447 /* Skip non-numeric token */
448 while (*p
&& !isspace((int) *p
))
450 /* Return zero, which caller must interpret as error. */
456 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
458 /* Trailing junk: return 0 and let caller print error msg. */
459 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
470 /* Like get_number_trailer, but don't allow a trailer. */
472 get_number (char **pp
)
474 return get_number_trailer (pp
, '\0');
477 /* Parse a number or a range.
478 * A number will be of the form handled by get_number.
479 * A range will be of the form <number1> - <number2>, and
480 * will represent all the integers between number1 and number2,
483 * While processing a range, this fuction is called iteratively;
484 * At each call it will return the next value in the range.
486 * At the beginning of parsing a range, the char pointer PP will
487 * be advanced past <number1> and left pointing at the '-' token.
488 * Subsequent calls will not advance the pointer until the range
489 * is completed. The call that completes the range will advance
490 * pointer PP past <number2>.
494 get_number_or_range (char **pp
)
496 static int last_retval
, end_value
;
497 static char *end_ptr
;
498 static int in_range
= 0;
502 /* Default case: pp is pointing either to a solo number,
503 or to the first number of a range. */
504 last_retval
= get_number_trailer (pp
, '-');
509 /* This is the start of a range (<number1> - <number2>).
510 Skip the '-', parse and remember the second number,
511 and also remember the end of the final token. */
515 while (isspace ((int) *end_ptr
))
516 end_ptr
++; /* skip white space */
517 end_value
= get_number (temp
);
518 if (end_value
< last_retval
)
520 error (_("inverted range"));
522 else if (end_value
== last_retval
)
524 /* degenerate range (number1 == number2). Advance the
525 token pointer so that the range will be treated as a
534 error (_("negative value"));
537 /* pp points to the '-' that betokens a range. All
538 number-parsing has already been done. Return the next
539 integer value (one greater than the saved previous value).
540 Do not advance the token pointer 'pp' until the end of range
543 if (++last_retval
== end_value
)
545 /* End of range reached; advance token pointer. */
555 /* condition N EXP -- set break condition of breakpoint N to EXP. */
558 condition_command (char *arg
, int from_tty
)
560 struct breakpoint
*b
;
565 error_no_arg (_("breakpoint number"));
568 bnum
= get_number (&p
);
570 error (_("Bad breakpoint argument: '%s'"), arg
);
573 if (b
->number
== bnum
)
575 struct bp_location
*loc
= b
->loc
;
576 for (; loc
; loc
= loc
->next
)
584 if (b
->cond_string
!= NULL
)
585 xfree (b
->cond_string
);
589 b
->cond_string
= NULL
;
591 printf_filtered (_("Breakpoint %d now unconditional.\n"), bnum
);
596 /* I don't know if it matters whether this is the string the user
597 typed in or the decompiled expression. */
598 b
->cond_string
= xstrdup (arg
);
599 b
->condition_not_parsed
= 0;
600 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
604 parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
606 error (_("Junk at end of expression"));
609 breakpoints_changed ();
610 observer_notify_breakpoint_modified (b
->number
);
614 error (_("No breakpoint number %d."), bnum
);
618 commands_command (char *arg
, int from_tty
)
620 struct breakpoint
*b
;
623 struct command_line
*l
;
625 /* If we allowed this, we would have problems with when to
626 free the storage, if we change the commands currently
629 if (executing_breakpoint_commands
)
630 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
633 bnum
= get_number (&p
);
636 error (_("Unexpected extra arguments following breakpoint number."));
639 if (b
->number
== bnum
)
641 char *tmpbuf
= xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
643 struct cleanup
*cleanups
= make_cleanup (xfree
, tmpbuf
);
644 l
= read_command_lines (tmpbuf
, from_tty
, 1);
645 do_cleanups (cleanups
);
646 free_command_lines (&b
->commands
);
648 breakpoints_changed ();
649 observer_notify_breakpoint_modified (b
->number
);
652 error (_("No breakpoint number %d."), bnum
);
655 /* Like commands_command, but instead of reading the commands from
656 input stream, takes them from an already parsed command structure.
658 This is used by cli-script.c to DTRT with breakpoint commands
659 that are part of if and while bodies. */
660 enum command_control_type
661 commands_from_control_command (char *arg
, struct command_line
*cmd
)
663 struct breakpoint
*b
;
667 /* If we allowed this, we would have problems with when to
668 free the storage, if we change the commands currently
671 if (executing_breakpoint_commands
)
672 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
674 /* An empty string for the breakpoint number means the last
675 breakpoint, but get_number expects a NULL pointer. */
680 bnum
= get_number (&p
);
683 error (_("Unexpected extra arguments following breakpoint number."));
686 if (b
->number
== bnum
)
688 free_command_lines (&b
->commands
);
689 if (cmd
->body_count
!= 1)
690 error (_("Invalid \"commands\" block structure."));
691 /* We need to copy the commands because if/while will free the
692 list after it finishes execution. */
693 b
->commands
= copy_command_lines (cmd
->body_list
[0]);
694 breakpoints_changed ();
695 observer_notify_breakpoint_modified (b
->number
);
696 return simple_control
;
698 error (_("No breakpoint number %d."), bnum
);
701 /* Update BUF, which is LEN bytes read from the target address MEMADDR,
702 by replacing any memory breakpoints with their shadowed contents. */
705 breakpoint_restore_shadows (gdb_byte
*buf
, ULONGEST memaddr
, LONGEST len
)
707 struct bp_location
*b
;
708 CORE_ADDR bp_addr
= 0;
714 if (b
->owner
->type
== bp_none
)
715 warning (_("reading through apparently deleted breakpoint #%d?"),
718 if (b
->loc_type
!= bp_loc_software_breakpoint
)
722 /* Addresses and length of the part of the breakpoint that
724 bp_addr
= b
->target_info
.placed_address
;
725 bp_size
= b
->target_info
.shadow_len
;
727 /* bp isn't valid, or doesn't shadow memory. */
730 if (bp_addr
+ bp_size
<= memaddr
)
731 /* The breakpoint is entirely before the chunk of memory we
735 if (bp_addr
>= memaddr
+ len
)
736 /* The breakpoint is entirely after the chunk of memory we are
740 /* Offset within shadow_contents. */
741 if (bp_addr
< memaddr
)
743 /* Only copy the second part of the breakpoint. */
744 bp_size
-= memaddr
- bp_addr
;
745 bptoffset
= memaddr
- bp_addr
;
749 if (bp_addr
+ bp_size
> memaddr
+ len
)
751 /* Only copy the first part of the breakpoint. */
752 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
755 memcpy (buf
+ bp_addr
- memaddr
,
756 b
->target_info
.shadow_contents
+ bptoffset
, bp_size
);
761 /* A wrapper function for inserting catchpoints. */
763 insert_catchpoint (struct ui_out
*uo
, void *args
)
765 struct breakpoint
*b
= (struct breakpoint
*) args
;
768 gdb_assert (b
->type
== bp_catchpoint
);
769 gdb_assert (b
->ops
!= NULL
&& b
->ops
->insert
!= NULL
);
775 is_hardware_watchpoint (struct breakpoint
*bpt
)
777 return (bpt
->type
== bp_hardware_watchpoint
778 || bpt
->type
== bp_read_watchpoint
779 || bpt
->type
== bp_access_watchpoint
);
782 /* Find the current value of a watchpoint on EXP. Return the value in
783 *VALP and *RESULTP and the chain of intermediate and final values
784 in *VAL_CHAIN. RESULTP and VAL_CHAIN may be NULL if the caller does
787 If a memory error occurs while evaluating the expression, *RESULTP will
788 be set to NULL. *RESULTP may be a lazy value, if the result could
789 not be read from memory. It is used to determine whether a value
790 is user-specified (we should watch the whole value) or intermediate
791 (we should watch only the bit used to locate the final value).
793 If the final value, or any intermediate value, could not be read
794 from memory, *VALP will be set to NULL. *VAL_CHAIN will still be
795 set to any referenced values. *VALP will never be a lazy value.
796 This is the value which we store in struct breakpoint.
798 If VAL_CHAIN is non-NULL, *VAL_CHAIN will be released from the
799 value chain. The caller must free the values individually. If
800 VAL_CHAIN is NULL, all generated values will be left on the value
804 fetch_watchpoint_value (struct expression
*exp
, struct value
**valp
,
805 struct value
**resultp
, struct value
**val_chain
)
807 struct value
*mark
, *new_mark
, *result
;
808 volatile struct gdb_exception ex
;
816 /* Evaluate the expression. */
817 mark
= value_mark ();
820 TRY_CATCH (ex
, RETURN_MASK_ALL
)
822 result
= evaluate_expression (exp
);
826 /* Ignore memory errors, we want watchpoints pointing at
827 inaccessible memory to still be created; otherwise, throw the
828 error to some higher catcher. */
834 throw_exception (ex
);
839 new_mark
= value_mark ();
840 if (mark
== new_mark
)
845 /* Make sure it's not lazy, so that after the target stops again we
846 have a non-lazy previous value to compare with. */
848 && (!value_lazy (result
) || gdb_value_fetch_lazy (result
)))
853 /* Return the chain of intermediate values. We use this to
854 decide which addresses to watch. */
855 *val_chain
= new_mark
;
856 value_release_to_mark (mark
);
860 /* Assuming that B is a watchpoint:
861 - Reparse watchpoint expression, if REPARSE is non-zero
862 - Evaluate expression and store the result in B->val
863 - Evaluate the condition if there is one, and store the result
865 - Update the list of values that must be watched in B->loc.
867 If the watchpoint disposition is disp_del_at_next_stop, then do nothing.
868 If this is local watchpoint that is out of scope, delete it. */
870 update_watchpoint (struct breakpoint
*b
, int reparse
)
872 int within_current_scope
;
873 struct frame_id saved_frame_id
;
874 struct bp_location
*loc
;
877 /* We don't free locations. They are stored in bp_location_chain and
878 update_global_locations will eventually delete them and remove
879 breakpoints if needed. */
882 if (b
->disposition
== disp_del_at_next_stop
)
885 /* Save the current frame's ID so we can restore it after
886 evaluating the watchpoint expression on its own frame. */
887 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
888 took a frame parameter, so that we didn't have to change the
890 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
892 /* Determine if the watchpoint is within scope. */
893 if (b
->exp_valid_block
== NULL
)
894 within_current_scope
= 1;
897 struct frame_info
*fi
;
898 fi
= frame_find_by_id (b
->watchpoint_frame
);
899 within_current_scope
= (fi
!= NULL
);
900 if (within_current_scope
)
904 if (within_current_scope
&& reparse
)
913 b
->exp
= parse_exp_1 (&s
, b
->exp_valid_block
, 0);
914 /* If the meaning of expression itself changed, the old value is
915 no longer relevant. We don't want to report a watchpoint hit
916 to the user when the old value and the new value may actually
917 be completely different objects. */
923 /* If we failed to parse the expression, for example because
924 it refers to a global variable in a not-yet-loaded shared library,
925 don't try to insert watchpoint. We don't automatically delete
926 such watchpoint, though, since failure to parse expression
927 is different from out-of-scope watchpoint. */
928 if (within_current_scope
&& b
->exp
)
930 struct value
*val_chain
, *v
, *result
, *next
;
932 fetch_watchpoint_value (b
->exp
, &v
, &result
, &val_chain
);
934 /* Avoid setting b->val if it's already set. The meaning of
935 b->val is 'the last value' user saw, and we should update
936 it only if we reported that last value to user. As it
937 happens, the code that reports it updates b->val directly. */
944 /* Change the type of breakpoint between hardware assisted or an
945 ordinary watchpoint depending on the hardware support and free
946 hardware slots. REPARSE is set when the inferior is started. */
947 if ((b
->type
== bp_watchpoint
|| b
->type
== bp_hardware_watchpoint
)
950 int i
, mem_cnt
, other_type_used
;
952 i
= hw_watchpoint_used_count (bp_hardware_watchpoint
,
954 mem_cnt
= can_use_hardware_watchpoint (val_chain
);
957 b
->type
= bp_watchpoint
;
960 int target_resources_ok
= target_can_use_hardware_watchpoint
961 (bp_hardware_watchpoint
, i
+ mem_cnt
, other_type_used
);
962 if (target_resources_ok
<= 0)
963 b
->type
= bp_watchpoint
;
965 b
->type
= bp_hardware_watchpoint
;
969 /* Look at each value on the value chain. */
970 for (v
= val_chain
; v
; v
= next
)
972 /* If it's a memory location, and GDB actually needed
973 its contents to evaluate the expression, then we
974 must watch it. If the first value returned is
975 still lazy, that means an error occurred reading it;
976 watch it anyway in case it becomes readable. */
977 if (VALUE_LVAL (v
) == lval_memory
978 && (v
== val_chain
|| ! value_lazy (v
)))
980 struct type
*vtype
= check_typedef (value_type (v
));
982 /* We only watch structs and arrays if user asked
983 for it explicitly, never if they just happen to
984 appear in the middle of some value chain. */
986 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
987 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
991 struct bp_location
*loc
, **tmp
;
993 addr
= value_address (v
);
994 len
= TYPE_LENGTH (value_type (v
));
996 if (b
->type
== bp_read_watchpoint
)
998 else if (b
->type
== bp_access_watchpoint
)
1001 loc
= allocate_bp_location (b
);
1002 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
1005 loc
->address
= addr
;
1007 loc
->watchpoint_type
= type
;
1011 next
= value_next (v
);
1016 /* We just regenerated the list of breakpoint locations.
1017 The new location does not have its condition field set to anything
1018 and therefore, we must always reparse the cond_string, independently
1019 of the value of the reparse flag. */
1020 if (b
->cond_string
!= NULL
)
1022 char *s
= b
->cond_string
;
1023 b
->loc
->cond
= parse_exp_1 (&s
, b
->exp_valid_block
, 0);
1026 else if (!within_current_scope
)
1028 printf_filtered (_("\
1029 Watchpoint %d deleted because the program has left the block \n\
1030 in which its expression is valid.\n"),
1032 if (b
->related_breakpoint
)
1033 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1034 b
->disposition
= disp_del_at_next_stop
;
1037 /* Restore the selected frame. */
1038 select_frame (frame_find_by_id (saved_frame_id
));
1042 /* Returns 1 iff breakpoint location should be
1043 inserted in the inferior. */
1045 should_be_inserted (struct bp_location
*bpt
)
1047 if (!breakpoint_enabled (bpt
->owner
))
1050 if (bpt
->owner
->disposition
== disp_del_at_next_stop
)
1053 if (!bpt
->enabled
|| bpt
->shlib_disabled
|| bpt
->duplicate
)
1056 /* Tracepoints are inserted by the target at a time of its choosing,
1058 if (bpt
->owner
->type
== bp_tracepoint
)
1064 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
1065 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
1066 and HW_BREAKPOINT_ERROR are used to report problems.
1068 NOTE drow/2003-09-09: This routine could be broken down to an object-style
1069 method for each breakpoint or catchpoint type. */
1071 insert_bp_location (struct bp_location
*bpt
,
1072 struct ui_file
*tmp_error_stream
,
1073 int *disabled_breaks
,
1074 int *hw_breakpoint_error
)
1078 if (!should_be_inserted (bpt
) || bpt
->inserted
)
1081 /* Initialize the target-specific information. */
1082 memset (&bpt
->target_info
, 0, sizeof (bpt
->target_info
));
1083 bpt
->target_info
.placed_address
= bpt
->address
;
1085 if (bpt
->loc_type
== bp_loc_software_breakpoint
1086 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1088 if (bpt
->owner
->type
!= bp_hardware_breakpoint
)
1090 /* If the explicitly specified breakpoint type
1091 is not hardware breakpoint, check the memory map to see
1092 if the breakpoint address is in read only memory or not.
1093 Two important cases are:
1094 - location type is not hardware breakpoint, memory
1095 is readonly. We change the type of the location to
1096 hardware breakpoint.
1097 - location type is hardware breakpoint, memory is read-write.
1098 This means we've previously made the location hardware one, but
1099 then the memory map changed, so we undo.
1101 When breakpoints are removed, remove_breakpoints will
1102 use location types we've just set here, the only possible
1103 problem is that memory map has changed during running program,
1104 but it's not going to work anyway with current gdb. */
1105 struct mem_region
*mr
1106 = lookup_mem_region (bpt
->target_info
.placed_address
);
1110 if (automatic_hardware_breakpoints
)
1113 enum bp_loc_type new_type
;
1115 if (mr
->attrib
.mode
!= MEM_RW
)
1116 new_type
= bp_loc_hardware_breakpoint
;
1118 new_type
= bp_loc_software_breakpoint
;
1120 if (new_type
!= bpt
->loc_type
)
1122 static int said
= 0;
1123 bpt
->loc_type
= new_type
;
1126 fprintf_filtered (gdb_stdout
, _("\
1127 Note: automatically using hardware breakpoints for read-only addresses.\n"));
1132 else if (bpt
->loc_type
== bp_loc_software_breakpoint
1133 && mr
->attrib
.mode
!= MEM_RW
)
1134 warning (_("cannot set software breakpoint at readonly address %s"),
1135 paddr (bpt
->address
));
1139 /* First check to see if we have to handle an overlay. */
1140 if (overlay_debugging
== ovly_off
1141 || bpt
->section
== NULL
1142 || !(section_is_overlay (bpt
->section
)))
1144 /* No overlay handling: just set the breakpoint. */
1146 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1147 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
1149 val
= target_insert_breakpoint (&bpt
->target_info
);
1153 /* This breakpoint is in an overlay section.
1154 Shall we set a breakpoint at the LMA? */
1155 if (!overlay_events_enabled
)
1157 /* Yes -- overlay event support is not active,
1158 so we must try to set a breakpoint at the LMA.
1159 This will not work for a hardware breakpoint. */
1160 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1161 warning (_("hardware breakpoint %d not supported in overlay!"),
1162 bpt
->owner
->number
);
1165 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
1167 /* Set a software (trap) breakpoint at the LMA. */
1168 bpt
->overlay_target_info
= bpt
->target_info
;
1169 bpt
->overlay_target_info
.placed_address
= addr
;
1170 val
= target_insert_breakpoint (&bpt
->overlay_target_info
);
1172 fprintf_unfiltered (tmp_error_stream
,
1173 "Overlay breakpoint %d failed: in ROM?\n",
1174 bpt
->owner
->number
);
1177 /* Shall we set a breakpoint at the VMA? */
1178 if (section_is_mapped (bpt
->section
))
1180 /* Yes. This overlay section is mapped into memory. */
1181 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1182 val
= target_insert_hw_breakpoint (&bpt
->target_info
);
1184 val
= target_insert_breakpoint (&bpt
->target_info
);
1188 /* No. This breakpoint will not be inserted.
1189 No error, but do not mark the bp as 'inserted'. */
1196 /* Can't set the breakpoint. */
1197 if (solib_name_from_address (bpt
->address
))
1199 /* See also: disable_breakpoints_in_shlibs. */
1201 bpt
->shlib_disabled
= 1;
1202 if (!*disabled_breaks
)
1204 fprintf_unfiltered (tmp_error_stream
,
1205 "Cannot insert breakpoint %d.\n",
1206 bpt
->owner
->number
);
1207 fprintf_unfiltered (tmp_error_stream
,
1208 "Temporarily disabling shared library breakpoints:\n");
1210 *disabled_breaks
= 1;
1211 fprintf_unfiltered (tmp_error_stream
,
1212 "breakpoint #%d\n", bpt
->owner
->number
);
1216 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
1218 *hw_breakpoint_error
= 1;
1219 fprintf_unfiltered (tmp_error_stream
,
1220 "Cannot insert hardware breakpoint %d.\n",
1221 bpt
->owner
->number
);
1225 fprintf_unfiltered (tmp_error_stream
,
1226 "Cannot insert breakpoint %d.\n",
1227 bpt
->owner
->number
);
1228 fprintf_filtered (tmp_error_stream
,
1229 "Error accessing memory address ");
1230 fputs_filtered (paddress (bpt
->address
), tmp_error_stream
);
1231 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1232 safe_strerror (val
));
1243 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
1244 /* NOTE drow/2003-09-08: This state only exists for removing
1245 watchpoints. It's not clear that it's necessary... */
1246 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
1248 val
= target_insert_watchpoint (bpt
->address
,
1250 bpt
->watchpoint_type
);
1251 bpt
->inserted
= (val
!= -1);
1254 else if (bpt
->owner
->type
== bp_catchpoint
)
1256 struct gdb_exception e
= catch_exception (uiout
, insert_catchpoint
,
1257 bpt
->owner
, RETURN_MASK_ERROR
);
1258 exception_fprintf (gdb_stderr
, e
, "warning: inserting catchpoint %d: ",
1259 bpt
->owner
->number
);
1261 bpt
->owner
->enable_state
= bp_disabled
;
1265 /* We've already printed an error message if there was a problem
1266 inserting this catchpoint, and we've disabled the catchpoint,
1267 so just return success. */
1274 /* Make sure all breakpoints are inserted in inferior.
1275 Throws exception on any error.
1276 A breakpoint that is already inserted won't be inserted
1277 again, so calling this function twice is safe. */
1279 insert_breakpoints (void)
1281 struct breakpoint
*bpt
;
1283 ALL_BREAKPOINTS (bpt
)
1284 if (is_hardware_watchpoint (bpt
))
1285 update_watchpoint (bpt
, 0 /* don't reparse. */);
1287 update_global_location_list (1);
1289 /* update_global_location_list does not insert breakpoints when
1290 always_inserted_mode is not enabled. Explicitly insert them
1292 if (!breakpoints_always_inserted_mode ())
1293 insert_breakpoint_locations ();
1296 /* insert_breakpoints is used when starting or continuing the program.
1297 remove_breakpoints is used when the program stops.
1298 Both return zero if successful,
1299 or an `errno' value if could not write the inferior. */
1302 insert_breakpoint_locations (void)
1304 struct breakpoint
*bpt
;
1305 struct bp_location
*b
, *temp
;
1308 int disabled_breaks
= 0;
1309 int hw_breakpoint_error
= 0;
1311 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1312 struct cleanup
*cleanups
= make_cleanup_ui_file_delete (tmp_error_stream
);
1314 /* Explicitly mark the warning -- this will only be printed if
1315 there was an error. */
1316 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1318 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1320 if (!should_be_inserted (b
) || b
->inserted
)
1323 /* There is no point inserting thread-specific breakpoints if the
1324 thread no longer exists. */
1325 if (b
->owner
->thread
!= -1
1326 && !valid_thread_id (b
->owner
->thread
))
1329 val
= insert_bp_location (b
, tmp_error_stream
,
1331 &hw_breakpoint_error
);
1336 /* If we failed to insert all locations of a watchpoint,
1337 remove them, as half-inserted watchpoint is of limited use. */
1338 ALL_BREAKPOINTS (bpt
)
1340 int some_failed
= 0;
1341 struct bp_location
*loc
;
1343 if (!is_hardware_watchpoint (bpt
))
1346 if (!breakpoint_enabled (bpt
))
1349 if (bpt
->disposition
== disp_del_at_next_stop
)
1352 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
1360 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
1362 remove_breakpoint (loc
, mark_uninserted
);
1364 hw_breakpoint_error
= 1;
1365 fprintf_unfiltered (tmp_error_stream
,
1366 "Could not insert hardware watchpoint %d.\n",
1374 /* If a hardware breakpoint or watchpoint was inserted, add a
1375 message about possibly exhausted resources. */
1376 if (hw_breakpoint_error
)
1378 fprintf_unfiltered (tmp_error_stream
,
1379 "Could not insert hardware breakpoints:\n\
1380 You may have requested too many hardware breakpoints/watchpoints.\n");
1382 target_terminal_ours_for_output ();
1383 error_stream (tmp_error_stream
);
1386 do_cleanups (cleanups
);
1390 remove_breakpoints (void)
1392 struct bp_location
*b
;
1395 ALL_BP_LOCATIONS (b
)
1399 val
= remove_breakpoint (b
, mark_uninserted
);
1408 remove_hw_watchpoints (void)
1410 struct bp_location
*b
;
1413 ALL_BP_LOCATIONS (b
)
1415 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1417 val
= remove_breakpoint (b
, mark_uninserted
);
1426 reattach_breakpoints (int pid
)
1428 struct bp_location
*b
;
1430 struct cleanup
*old_chain
= save_inferior_ptid ();
1431 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1432 int dummy1
= 0, dummy2
= 0;
1434 make_cleanup_ui_file_delete (tmp_error_stream
);
1436 inferior_ptid
= pid_to_ptid (pid
);
1437 ALL_BP_LOCATIONS (b
)
1442 val
= insert_bp_location (b
, tmp_error_stream
,
1446 do_cleanups (old_chain
);
1451 do_cleanups (old_chain
);
1455 static int internal_breakpoint_number
= -1;
1457 static struct breakpoint
*
1458 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
1460 struct symtab_and_line sal
;
1461 struct breakpoint
*b
;
1463 init_sal (&sal
); /* initialize to zeroes */
1466 sal
.section
= find_pc_overlay (sal
.pc
);
1468 b
= set_raw_breakpoint (sal
, type
);
1469 b
->number
= internal_breakpoint_number
--;
1470 b
->disposition
= disp_donttouch
;
1476 create_overlay_event_breakpoint (char *func_name
, struct objfile
*objfile
)
1478 struct breakpoint
*b
;
1479 struct minimal_symbol
*m
;
1481 if ((m
= lookup_minimal_symbol_text (func_name
, objfile
)) == NULL
)
1484 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
1486 b
->addr_string
= xstrdup (func_name
);
1488 if (overlay_debugging
== ovly_auto
)
1490 b
->enable_state
= bp_enabled
;
1491 overlay_events_enabled
= 1;
1495 b
->enable_state
= bp_disabled
;
1496 overlay_events_enabled
= 0;
1498 update_global_location_list (1);
1502 update_breakpoints_after_exec (void)
1504 struct breakpoint
*b
;
1505 struct breakpoint
*temp
;
1506 struct bp_location
*bploc
;
1507 struct objfile
*objfile
;
1509 /* We're about to delete breakpoints from GDB's lists. If the
1510 INSERTED flag is true, GDB will try to lift the breakpoints by
1511 writing the breakpoints' "shadow contents" back into memory. The
1512 "shadow contents" are NOT valid after an exec, so GDB should not
1513 do that. Instead, the target is responsible from marking
1514 breakpoints out as soon as it detects an exec. We don't do that
1515 here instead, because there may be other attempts to delete
1516 breakpoints after detecting an exec and before reaching here. */
1517 ALL_BP_LOCATIONS (bploc
)
1518 gdb_assert (!bploc
->inserted
);
1520 ALL_BREAKPOINTS_SAFE (b
, temp
)
1522 /* Solib breakpoints must be explicitly reset after an exec(). */
1523 if (b
->type
== bp_shlib_event
)
1525 delete_breakpoint (b
);
1529 /* Thread event breakpoints must be set anew after an exec(),
1530 as must overlay event breakpoints. */
1531 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1533 delete_breakpoint (b
);
1537 /* Step-resume breakpoints are meaningless after an exec(). */
1538 if (b
->type
== bp_step_resume
)
1540 delete_breakpoint (b
);
1544 /* Longjmp and longjmp-resume breakpoints are also meaningless
1546 if (b
->type
== bp_longjmp
|| b
->type
== bp_longjmp_resume
)
1548 delete_breakpoint (b
);
1552 if (b
->type
== bp_catchpoint
)
1554 /* For now, none of the bp_catchpoint breakpoints need to
1555 do anything at this point. In the future, if some of
1556 the catchpoints need to something, we will need to add
1557 a new method, and call this method from here. */
1561 /* bp_finish is a special case. The only way we ought to be able
1562 to see one of these when an exec() has happened, is if the user
1563 caught a vfork, and then said "finish". Ordinarily a finish just
1564 carries them to the call-site of the current callee, by setting
1565 a temporary bp there and resuming. But in this case, the finish
1566 will carry them entirely through the vfork & exec.
1568 We don't want to allow a bp_finish to remain inserted now. But
1569 we can't safely delete it, 'cause finish_command has a handle to
1570 the bp on a bpstat, and will later want to delete it. There's a
1571 chance (and I've seen it happen) that if we delete the bp_finish
1572 here, that its storage will get reused by the time finish_command
1573 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1574 We really must allow finish_command to delete a bp_finish.
1576 In the absense of a general solution for the "how do we know
1577 it's safe to delete something others may have handles to?"
1578 problem, what we'll do here is just uninsert the bp_finish, and
1579 let finish_command delete it.
1581 (We know the bp_finish is "doomed" in the sense that it's
1582 momentary, and will be deleted as soon as finish_command sees
1583 the inferior stopped. So it doesn't matter that the bp's
1584 address is probably bogus in the new a.out, unlike e.g., the
1585 solib breakpoints.) */
1587 if (b
->type
== bp_finish
)
1592 /* Without a symbolic address, we have little hope of the
1593 pre-exec() address meaning the same thing in the post-exec()
1595 if (b
->addr_string
== NULL
)
1597 delete_breakpoint (b
);
1601 /* FIXME what about longjmp breakpoints? Re-create them here? */
1602 ALL_OBJFILES (objfile
)
1603 create_overlay_event_breakpoint ("_ovly_debug_event", objfile
);
1607 detach_breakpoints (int pid
)
1609 struct bp_location
*b
;
1611 struct cleanup
*old_chain
= save_inferior_ptid ();
1613 if (pid
== PIDGET (inferior_ptid
))
1614 error (_("Cannot detach breakpoints of inferior_ptid"));
1616 /* Set inferior_ptid; remove_breakpoint uses this global. */
1617 inferior_ptid
= pid_to_ptid (pid
);
1618 ALL_BP_LOCATIONS (b
)
1622 val
= remove_breakpoint (b
, mark_inserted
);
1625 do_cleanups (old_chain
);
1630 do_cleanups (old_chain
);
1635 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1639 if (b
->owner
->enable_state
== bp_permanent
)
1640 /* Permanent breakpoints cannot be inserted or removed. */
1643 /* The type of none suggests that owner is actually deleted.
1644 This should not ever happen. */
1645 gdb_assert (b
->owner
->type
!= bp_none
);
1647 if (b
->loc_type
== bp_loc_software_breakpoint
1648 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1650 /* "Normal" instruction breakpoint: either the standard
1651 trap-instruction bp (bp_breakpoint), or a
1652 bp_hardware_breakpoint. */
1654 /* First check to see if we have to handle an overlay. */
1655 if (overlay_debugging
== ovly_off
1656 || b
->section
== NULL
1657 || !(section_is_overlay (b
->section
)))
1659 /* No overlay handling: just remove the breakpoint. */
1661 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1662 val
= target_remove_hw_breakpoint (&b
->target_info
);
1664 val
= target_remove_breakpoint (&b
->target_info
);
1668 /* This breakpoint is in an overlay section.
1669 Did we set a breakpoint at the LMA? */
1670 if (!overlay_events_enabled
)
1672 /* Yes -- overlay event support is not active, so we
1673 should have set a breakpoint at the LMA. Remove it.
1675 /* Ignore any failures: if the LMA is in ROM, we will
1676 have already warned when we failed to insert it. */
1677 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1678 target_remove_hw_breakpoint (&b
->overlay_target_info
);
1680 target_remove_breakpoint (&b
->overlay_target_info
);
1682 /* Did we set a breakpoint at the VMA?
1683 If so, we will have marked the breakpoint 'inserted'. */
1686 /* Yes -- remove it. Previously we did not bother to
1687 remove the breakpoint if the section had been
1688 unmapped, but let's not rely on that being safe. We
1689 don't know what the overlay manager might do. */
1690 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1691 val
= target_remove_hw_breakpoint (&b
->target_info
);
1693 /* However, we should remove *software* breakpoints only
1694 if the section is still mapped, or else we overwrite
1695 wrong code with the saved shadow contents. */
1696 else if (section_is_mapped (b
->section
))
1697 val
= target_remove_breakpoint (&b
->target_info
);
1703 /* No -- not inserted, so no need to remove. No error. */
1708 /* In some cases, we might not be able to remove a breakpoint
1709 in a shared library that has already been removed, but we
1710 have not yet processed the shlib unload event. */
1711 if (val
&& solib_name_from_address (b
->address
))
1716 b
->inserted
= (is
== mark_inserted
);
1718 else if (b
->loc_type
== bp_loc_hardware_watchpoint
)
1723 b
->inserted
= (is
== mark_inserted
);
1724 val
= target_remove_watchpoint (b
->address
, b
->length
,
1725 b
->watchpoint_type
);
1727 /* Failure to remove any of the hardware watchpoints comes here. */
1728 if ((is
== mark_uninserted
) && (b
->inserted
))
1729 warning (_("Could not remove hardware watchpoint %d."),
1732 else if (b
->owner
->type
== bp_catchpoint
1733 && breakpoint_enabled (b
->owner
)
1736 gdb_assert (b
->owner
->ops
!= NULL
&& b
->owner
->ops
->remove
!= NULL
);
1738 val
= b
->owner
->ops
->remove (b
->owner
);
1741 b
->inserted
= (is
== mark_inserted
);
1747 /* Clear the "inserted" flag in all breakpoints. */
1750 mark_breakpoints_out (void)
1752 struct bp_location
*bpt
;
1754 ALL_BP_LOCATIONS (bpt
)
1758 /* Clear the "inserted" flag in all breakpoints and delete any
1759 breakpoints which should go away between runs of the program.
1761 Plus other such housekeeping that has to be done for breakpoints
1764 Note: this function gets called at the end of a run (by
1765 generic_mourn_inferior) and when a run begins (by
1766 init_wait_for_inferior). */
1771 breakpoint_init_inferior (enum inf_context context
)
1773 struct breakpoint
*b
, *temp
;
1774 struct bp_location
*bpt
;
1777 /* If breakpoint locations are shared across processes, then there's
1779 if (gdbarch_has_global_breakpoints (target_gdbarch
))
1782 ALL_BP_LOCATIONS (bpt
)
1783 if (bpt
->owner
->enable_state
!= bp_permanent
)
1786 ALL_BREAKPOINTS_SAFE (b
, temp
)
1791 case bp_watchpoint_scope
:
1793 /* If the call dummy breakpoint is at the entry point it will
1794 cause problems when the inferior is rerun, so we better
1797 Also get rid of scope breakpoints. */
1798 delete_breakpoint (b
);
1802 case bp_hardware_watchpoint
:
1803 case bp_read_watchpoint
:
1804 case bp_access_watchpoint
:
1806 /* Likewise for watchpoints on local expressions. */
1807 if (b
->exp_valid_block
!= NULL
)
1808 delete_breakpoint (b
);
1809 else if (context
== inf_starting
)
1811 /* Reset val field to force reread of starting value
1812 in insert_breakpoints. */
1814 value_free (b
->val
);
1824 /* Get rid of the moribund locations. */
1825 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, bpt
); ++ix
)
1826 free_bp_location (bpt
);
1827 VEC_free (bp_location_p
, moribund_locations
);
1830 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1831 exists at PC. It returns ordinary_breakpoint_here if it's an
1832 ordinary breakpoint, or permanent_breakpoint_here if it's a
1833 permanent breakpoint.
1834 - When continuing from a location with an ordinary breakpoint, we
1835 actually single step once before calling insert_breakpoints.
1836 - When continuing from a localion with a permanent breakpoint, we
1837 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1838 the target, to advance the PC past the breakpoint. */
1840 enum breakpoint_here
1841 breakpoint_here_p (CORE_ADDR pc
)
1843 const struct bp_location
*bpt
;
1844 int any_breakpoint_here
= 0;
1846 ALL_BP_LOCATIONS (bpt
)
1848 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1849 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1852 if ((breakpoint_enabled (bpt
->owner
)
1853 || bpt
->owner
->enable_state
== bp_permanent
)
1854 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1856 if (overlay_debugging
1857 && section_is_overlay (bpt
->section
)
1858 && !section_is_mapped (bpt
->section
))
1859 continue; /* unmapped overlay -- can't be a match */
1860 else if (bpt
->owner
->enable_state
== bp_permanent
)
1861 return permanent_breakpoint_here
;
1863 any_breakpoint_here
= 1;
1867 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1870 /* Return true if there's a moribund breakpoint at PC. */
1873 moribund_breakpoint_here_p (CORE_ADDR pc
)
1875 struct bp_location
*loc
;
1878 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
1879 if (loc
->address
== pc
)
1885 /* Returns non-zero if there's a breakpoint inserted at PC, which is
1886 inserted using regular breakpoint_chain/bp_location_chain mechanism.
1887 This does not check for single-step breakpoints, which are
1888 inserted and removed using direct target manipulation. */
1891 regular_breakpoint_inserted_here_p (CORE_ADDR pc
)
1893 const struct bp_location
*bpt
;
1895 ALL_BP_LOCATIONS (bpt
)
1897 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1898 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1902 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1904 if (overlay_debugging
1905 && section_is_overlay (bpt
->section
)
1906 && !section_is_mapped (bpt
->section
))
1907 continue; /* unmapped overlay -- can't be a match */
1915 /* Returns non-zero iff there's either regular breakpoint
1916 or a single step breakpoint inserted at PC. */
1919 breakpoint_inserted_here_p (CORE_ADDR pc
)
1921 if (regular_breakpoint_inserted_here_p (pc
))
1924 if (single_step_breakpoint_inserted_here_p (pc
))
1930 /* This function returns non-zero iff there is a software breakpoint
1934 software_breakpoint_inserted_here_p (CORE_ADDR pc
)
1936 const struct bp_location
*bpt
;
1937 int any_breakpoint_here
= 0;
1939 ALL_BP_LOCATIONS (bpt
)
1941 if (bpt
->loc_type
!= bp_loc_software_breakpoint
)
1945 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1947 if (overlay_debugging
1948 && section_is_overlay (bpt
->section
)
1949 && !section_is_mapped (bpt
->section
))
1950 continue; /* unmapped overlay -- can't be a match */
1956 /* Also check for software single-step breakpoints. */
1957 if (single_step_breakpoint_inserted_here_p (pc
))
1963 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1964 PC is valid for process/thread PTID. */
1967 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1969 const struct bp_location
*bpt
;
1970 /* The thread and task IDs associated to PTID, computed lazily. */
1974 ALL_BP_LOCATIONS (bpt
)
1976 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1977 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1980 if (!breakpoint_enabled (bpt
->owner
)
1981 && bpt
->owner
->enable_state
!= bp_permanent
)
1984 if (bpt
->address
!= pc
)
1987 if (bpt
->owner
->thread
!= -1)
1989 /* This is a thread-specific breakpoint. Check that ptid
1990 matches that thread. If thread hasn't been computed yet,
1991 it is now time to do so. */
1993 thread
= pid_to_thread_id (ptid
);
1994 if (bpt
->owner
->thread
!= thread
)
1998 if (bpt
->owner
->task
!= 0)
2000 /* This is a task-specific breakpoint. Check that ptid
2001 matches that task. If task hasn't been computed yet,
2002 it is now time to do so. */
2004 task
= ada_get_task_number (ptid
);
2005 if (bpt
->owner
->task
!= task
)
2009 if (overlay_debugging
2010 && section_is_overlay (bpt
->section
)
2011 && !section_is_mapped (bpt
->section
))
2012 continue; /* unmapped overlay -- can't be a match */
2021 /* bpstat stuff. External routines' interfaces are documented
2025 ep_is_catchpoint (struct breakpoint
*ep
)
2027 return (ep
->type
== bp_catchpoint
);
2031 bpstat_free (bpstat bs
)
2033 if (bs
->old_val
!= NULL
)
2034 value_free (bs
->old_val
);
2035 free_command_lines (&bs
->commands
);
2039 /* Clear a bpstat so that it says we are not at any breakpoint.
2040 Also free any storage that is part of a bpstat. */
2043 bpstat_clear (bpstat
*bsp
)
2060 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
2061 is part of the bpstat is copied as well. */
2064 bpstat_copy (bpstat bs
)
2068 bpstat retval
= NULL
;
2073 for (; bs
!= NULL
; bs
= bs
->next
)
2075 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
2076 memcpy (tmp
, bs
, sizeof (*tmp
));
2077 if (bs
->commands
!= NULL
)
2078 tmp
->commands
= copy_command_lines (bs
->commands
);
2079 if (bs
->old_val
!= NULL
)
2081 tmp
->old_val
= value_copy (bs
->old_val
);
2082 release_value (tmp
->old_val
);
2086 /* This is the first thing in the chain. */
2096 /* Find the bpstat associated with this breakpoint */
2099 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
2104 for (; bsp
!= NULL
; bsp
= bsp
->next
)
2106 if (bsp
->breakpoint_at
&& bsp
->breakpoint_at
->owner
== breakpoint
)
2112 /* Find a step_resume breakpoint associated with this bpstat.
2113 (If there are multiple step_resume bp's on the list, this function
2114 will arbitrarily pick one.)
2116 It is an error to use this function if BPSTAT doesn't contain a
2117 step_resume breakpoint.
2119 See wait_for_inferior's use of this function. */
2121 bpstat_find_step_resume_breakpoint (bpstat bsp
)
2125 gdb_assert (bsp
!= NULL
);
2127 current_thread
= pid_to_thread_id (inferior_ptid
);
2129 for (; bsp
!= NULL
; bsp
= bsp
->next
)
2131 if ((bsp
->breakpoint_at
!= NULL
) &&
2132 (bsp
->breakpoint_at
->owner
->type
== bp_step_resume
) &&
2133 (bsp
->breakpoint_at
->owner
->thread
== current_thread
||
2134 bsp
->breakpoint_at
->owner
->thread
== -1))
2135 return bsp
->breakpoint_at
->owner
;
2138 internal_error (__FILE__
, __LINE__
, _("No step_resume breakpoint found."));
2142 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
2143 at. *BSP upon return is a bpstat which points to the remaining
2144 breakpoints stopped at (but which is not guaranteed to be good for
2145 anything but further calls to bpstat_num).
2146 Return 0 if passed a bpstat which does not indicate any breakpoints.
2147 Return -1 if stopped at a breakpoint that has been deleted since
2149 Return 1 otherwise. */
2152 bpstat_num (bpstat
*bsp
, int *num
)
2154 struct breakpoint
*b
;
2157 return 0; /* No more breakpoint values */
2159 /* We assume we'll never have several bpstats that
2160 correspond to a single breakpoint -- otherwise,
2161 this function might return the same number more
2162 than once and this will look ugly. */
2163 b
= (*bsp
)->breakpoint_at
? (*bsp
)->breakpoint_at
->owner
: NULL
;
2164 *bsp
= (*bsp
)->next
;
2166 return -1; /* breakpoint that's been deleted since */
2168 *num
= b
->number
; /* We have its number */
2172 /* Modify BS so that the actions will not be performed. */
2175 bpstat_clear_actions (bpstat bs
)
2177 for (; bs
!= NULL
; bs
= bs
->next
)
2179 free_command_lines (&bs
->commands
);
2180 if (bs
->old_val
!= NULL
)
2182 value_free (bs
->old_val
);
2188 /* Called when a command is about to proceed the inferior. */
2191 breakpoint_about_to_proceed (void)
2193 if (!ptid_equal (inferior_ptid
, null_ptid
))
2195 struct thread_info
*tp
= inferior_thread ();
2197 /* Allow inferior function calls in breakpoint commands to not
2198 interrupt the command list. When the call finishes
2199 successfully, the inferior will be standing at the same
2200 breakpoint as if nothing happened. */
2205 breakpoint_proceeded
= 1;
2208 /* Stub for cleaning up our state if we error-out of a breakpoint command */
2210 cleanup_executing_breakpoints (void *ignore
)
2212 executing_breakpoint_commands
= 0;
2215 /* Execute all the commands associated with all the breakpoints at this
2216 location. Any of these commands could cause the process to proceed
2217 beyond this point, etc. We look out for such changes by checking
2218 the global "breakpoint_proceeded" after each command.
2220 Returns true if a breakpoint command resumed the inferior. In that
2221 case, it is the caller's responsibility to recall it again with the
2222 bpstat of the current thread. */
2225 bpstat_do_actions_1 (bpstat
*bsp
)
2228 struct cleanup
*old_chain
;
2231 /* Avoid endless recursion if a `source' command is contained
2233 if (executing_breakpoint_commands
)
2236 executing_breakpoint_commands
= 1;
2237 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
2239 /* This pointer will iterate over the list of bpstat's. */
2242 breakpoint_proceeded
= 0;
2243 for (; bs
!= NULL
; bs
= bs
->next
)
2245 struct command_line
*cmd
;
2246 struct cleanup
*this_cmd_tree_chain
;
2248 /* Take ownership of the BSP's command tree, if it has one.
2250 The command tree could legitimately contain commands like
2251 'step' and 'next', which call clear_proceed_status, which
2252 frees stop_bpstat's command tree. To make sure this doesn't
2253 free the tree we're executing out from under us, we need to
2254 take ownership of the tree ourselves. Since a given bpstat's
2255 commands are only executed once, we don't need to copy it; we
2256 can clear the pointer in the bpstat, and make sure we free
2257 the tree when we're done. */
2260 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2264 execute_control_command (cmd
);
2266 if (breakpoint_proceeded
)
2272 /* We can free this command tree now. */
2273 do_cleanups (this_cmd_tree_chain
);
2275 if (breakpoint_proceeded
)
2277 if (target_can_async_p ())
2278 /* If we are in async mode, then the target might be still
2279 running, not stopped at any breakpoint, so nothing for
2280 us to do here -- just return to the event loop. */
2283 /* In sync mode, when execute_control_command returns
2284 we're already standing on the next breakpoint.
2285 Breakpoint commands for that stop were not run, since
2286 execute_command does not run breakpoint commands --
2287 only command_line_handler does, but that one is not
2288 involved in execution of breakpoint commands. So, we
2289 can now execute breakpoint commands. It should be
2290 noted that making execute_command do bpstat actions is
2291 not an option -- in this case we'll have recursive
2292 invocation of bpstat for each breakpoint with a
2293 command, and can easily blow up GDB stack. Instead, we
2294 return true, which will trigger the caller to recall us
2295 with the new stop_bpstat. */
2300 do_cleanups (old_chain
);
2305 bpstat_do_actions (void)
2307 /* Do any commands attached to breakpoint we are stopped at. */
2308 while (!ptid_equal (inferior_ptid
, null_ptid
)
2309 && target_has_execution
2310 && !is_exited (inferior_ptid
)
2311 && !is_executing (inferior_ptid
))
2312 /* Since in sync mode, bpstat_do_actions may resume the inferior,
2313 and only return when it is stopped at the next breakpoint, we
2314 keep doing breakpoint actions until it returns false to
2315 indicate the inferior was not resumed. */
2316 if (!bpstat_do_actions_1 (&inferior_thread ()->stop_bpstat
))
2320 /* Print out the (old or new) value associated with a watchpoint. */
2323 watchpoint_value_print (struct value
*val
, struct ui_file
*stream
)
2326 fprintf_unfiltered (stream
, _("<unreadable>"));
2329 struct value_print_options opts
;
2330 get_user_print_options (&opts
);
2331 value_print (val
, stream
, &opts
);
2335 /* This is the normal print function for a bpstat. In the future,
2336 much of this logic could (should?) be moved to bpstat_stop_status,
2337 by having it set different print_it values.
2339 Current scheme: When we stop, bpstat_print() is called. It loops
2340 through the bpstat list of things causing this stop, calling the
2341 print_bp_stop_message function on each one. The behavior of the
2342 print_bp_stop_message function depends on the print_it field of
2343 bpstat. If such field so indicates, call this function here.
2345 Return values from this routine (ultimately used by bpstat_print()
2346 and normal_stop() to decide what to do):
2347 PRINT_NOTHING: Means we already printed all we needed to print,
2348 don't print anything else.
2349 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2350 that something to be followed by a location.
2351 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2352 that something to be followed by a location.
2353 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2356 static enum print_stop_action
2357 print_it_typical (bpstat bs
)
2359 struct cleanup
*old_chain
;
2360 struct breakpoint
*b
;
2361 const struct bp_location
*bl
;
2362 struct ui_stream
*stb
;
2364 enum print_stop_action result
;
2366 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2367 which has since been deleted. */
2368 if (bs
->breakpoint_at
== NULL
)
2369 return PRINT_UNKNOWN
;
2370 bl
= bs
->breakpoint_at
;
2373 stb
= ui_out_stream_new (uiout
);
2374 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2379 case bp_hardware_breakpoint
:
2380 bp_temp
= bs
->breakpoint_at
->owner
->disposition
== disp_del
;
2381 if (bl
->address
!= bl
->requested_address
)
2382 breakpoint_adjustment_warning (bl
->requested_address
,
2385 annotate_breakpoint (b
->number
);
2387 ui_out_text (uiout
, "\nTemporary breakpoint ");
2389 ui_out_text (uiout
, "\nBreakpoint ");
2390 if (ui_out_is_mi_like_p (uiout
))
2392 ui_out_field_string (uiout
, "reason",
2393 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
2394 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
2396 ui_out_field_int (uiout
, "bkptno", b
->number
);
2397 ui_out_text (uiout
, ", ");
2398 result
= PRINT_SRC_AND_LOC
;
2401 case bp_shlib_event
:
2402 /* Did we stop because the user set the stop_on_solib_events
2403 variable? (If so, we report this as a generic, "Stopped due
2404 to shlib event" message.) */
2405 printf_filtered (_("Stopped due to shared library event\n"));
2406 result
= PRINT_NOTHING
;
2409 case bp_thread_event
:
2410 /* Not sure how we will get here.
2411 GDB should not stop for these breakpoints. */
2412 printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n"));
2413 result
= PRINT_NOTHING
;
2416 case bp_overlay_event
:
2417 /* By analogy with the thread event, GDB should not stop for these. */
2418 printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n"));
2419 result
= PRINT_NOTHING
;
2423 case bp_hardware_watchpoint
:
2424 annotate_watchpoint (b
->number
);
2425 if (ui_out_is_mi_like_p (uiout
))
2428 async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER
));
2430 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2431 ui_out_text (uiout
, "\nOld value = ");
2432 watchpoint_value_print (bs
->old_val
, stb
->stream
);
2433 ui_out_field_stream (uiout
, "old", stb
);
2434 ui_out_text (uiout
, "\nNew value = ");
2435 watchpoint_value_print (b
->val
, stb
->stream
);
2436 ui_out_field_stream (uiout
, "new", stb
);
2437 ui_out_text (uiout
, "\n");
2438 /* More than one watchpoint may have been triggered. */
2439 result
= PRINT_UNKNOWN
;
2442 case bp_read_watchpoint
:
2443 if (ui_out_is_mi_like_p (uiout
))
2446 async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER
));
2448 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2449 ui_out_text (uiout
, "\nValue = ");
2450 watchpoint_value_print (b
->val
, stb
->stream
);
2451 ui_out_field_stream (uiout
, "value", stb
);
2452 ui_out_text (uiout
, "\n");
2453 result
= PRINT_UNKNOWN
;
2456 case bp_access_watchpoint
:
2457 if (bs
->old_val
!= NULL
)
2459 annotate_watchpoint (b
->number
);
2460 if (ui_out_is_mi_like_p (uiout
))
2463 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2465 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2466 ui_out_text (uiout
, "\nOld value = ");
2467 watchpoint_value_print (bs
->old_val
, stb
->stream
);
2468 ui_out_field_stream (uiout
, "old", stb
);
2469 ui_out_text (uiout
, "\nNew value = ");
2474 if (ui_out_is_mi_like_p (uiout
))
2477 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2478 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2479 ui_out_text (uiout
, "\nValue = ");
2481 watchpoint_value_print (b
->val
, stb
->stream
);
2482 ui_out_field_stream (uiout
, "new", stb
);
2483 ui_out_text (uiout
, "\n");
2484 result
= PRINT_UNKNOWN
;
2487 /* Fall through, we don't deal with these types of breakpoints
2491 if (ui_out_is_mi_like_p (uiout
))
2494 async_reason_lookup (EXEC_ASYNC_FUNCTION_FINISHED
));
2495 result
= PRINT_UNKNOWN
;
2499 if (ui_out_is_mi_like_p (uiout
))
2502 async_reason_lookup (EXEC_ASYNC_LOCATION_REACHED
));
2503 result
= PRINT_UNKNOWN
;
2508 case bp_longjmp_resume
:
2509 case bp_step_resume
:
2510 case bp_watchpoint_scope
:
2514 result
= PRINT_UNKNOWN
;
2518 do_cleanups (old_chain
);
2522 /* Generic routine for printing messages indicating why we
2523 stopped. The behavior of this function depends on the value
2524 'print_it' in the bpstat structure. Under some circumstances we
2525 may decide not to print anything here and delegate the task to
2528 static enum print_stop_action
2529 print_bp_stop_message (bpstat bs
)
2531 switch (bs
->print_it
)
2534 /* Nothing should be printed for this bpstat entry. */
2535 return PRINT_UNKNOWN
;
2539 /* We still want to print the frame, but we already printed the
2540 relevant messages. */
2541 return PRINT_SRC_AND_LOC
;
2544 case print_it_normal
:
2546 const struct bp_location
*bl
= bs
->breakpoint_at
;
2547 struct breakpoint
*b
= bl
? bl
->owner
: NULL
;
2549 /* Normal case. Call the breakpoint's print_it method, or
2550 print_it_typical. */
2551 /* FIXME: how breakpoint can ever be NULL here? */
2552 if (b
!= NULL
&& b
->ops
!= NULL
&& b
->ops
->print_it
!= NULL
)
2553 return b
->ops
->print_it (b
);
2555 return print_it_typical (bs
);
2560 internal_error (__FILE__
, __LINE__
,
2561 _("print_bp_stop_message: unrecognized enum value"));
2566 /* Print a message indicating what happened. This is called from
2567 normal_stop(). The input to this routine is the head of the bpstat
2568 list - a list of the eventpoints that caused this stop. This
2569 routine calls the generic print routine for printing a message
2570 about reasons for stopping. This will print (for example) the
2571 "Breakpoint n," part of the output. The return value of this
2574 PRINT_UNKNOWN: Means we printed nothing
2575 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2576 code to print the location. An example is
2577 "Breakpoint 1, " which should be followed by
2579 PRINT_SRC_ONLY: Means we printed something, but there is no need
2580 to also print the location part of the message.
2581 An example is the catch/throw messages, which
2582 don't require a location appended to the end.
2583 PRINT_NOTHING: We have done some printing and we don't need any
2584 further info to be printed.*/
2586 enum print_stop_action
2587 bpstat_print (bpstat bs
)
2591 /* Maybe another breakpoint in the chain caused us to stop.
2592 (Currently all watchpoints go on the bpstat whether hit or not.
2593 That probably could (should) be changed, provided care is taken
2594 with respect to bpstat_explains_signal). */
2595 for (; bs
; bs
= bs
->next
)
2597 val
= print_bp_stop_message (bs
);
2598 if (val
== PRINT_SRC_ONLY
2599 || val
== PRINT_SRC_AND_LOC
2600 || val
== PRINT_NOTHING
)
2604 /* We reached the end of the chain, or we got a null BS to start
2605 with and nothing was printed. */
2606 return PRINT_UNKNOWN
;
2609 /* Evaluate the expression EXP and return 1 if value is zero.
2610 This is used inside a catch_errors to evaluate the breakpoint condition.
2611 The argument is a "struct expression *" that has been cast to char * to
2612 make it pass through catch_errors. */
2615 breakpoint_cond_eval (void *exp
)
2617 struct value
*mark
= value_mark ();
2618 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2619 value_free_to_mark (mark
);
2623 /* Allocate a new bpstat and chain it to the current one. */
2626 bpstat_alloc (const struct bp_location
*bl
, bpstat cbs
/* Current "bs" value */ )
2630 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2632 bs
->breakpoint_at
= bl
;
2633 /* If the condition is false, etc., don't do the commands. */
2634 bs
->commands
= NULL
;
2636 bs
->print_it
= print_it_normal
;
2640 /* The target has stopped with waitstatus WS. Check if any hardware
2641 watchpoints have triggered, according to the target. */
2644 watchpoints_triggered (struct target_waitstatus
*ws
)
2646 int stopped_by_watchpoint
= target_stopped_by_watchpoint ();
2648 struct breakpoint
*b
;
2650 if (!stopped_by_watchpoint
)
2652 /* We were not stopped by a watchpoint. Mark all watchpoints
2653 as not triggered. */
2655 if (b
->type
== bp_hardware_watchpoint
2656 || b
->type
== bp_read_watchpoint
2657 || b
->type
== bp_access_watchpoint
)
2658 b
->watchpoint_triggered
= watch_triggered_no
;
2663 if (!target_stopped_data_address (¤t_target
, &addr
))
2665 /* We were stopped by a watchpoint, but we don't know where.
2666 Mark all watchpoints as unknown. */
2668 if (b
->type
== bp_hardware_watchpoint
2669 || b
->type
== bp_read_watchpoint
2670 || b
->type
== bp_access_watchpoint
)
2671 b
->watchpoint_triggered
= watch_triggered_unknown
;
2673 return stopped_by_watchpoint
;
2676 /* The target could report the data address. Mark watchpoints
2677 affected by this data address as triggered, and all others as not
2681 if (b
->type
== bp_hardware_watchpoint
2682 || b
->type
== bp_read_watchpoint
2683 || b
->type
== bp_access_watchpoint
)
2685 struct bp_location
*loc
;
2688 b
->watchpoint_triggered
= watch_triggered_no
;
2689 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
2690 /* Exact match not required. Within range is
2692 if (target_watchpoint_addr_within_range (¤t_target
,
2696 b
->watchpoint_triggered
= watch_triggered_yes
;
2704 /* Possible return values for watchpoint_check (this can't be an enum
2705 because of check_errors). */
2706 /* The watchpoint has been deleted. */
2707 #define WP_DELETED 1
2708 /* The value has changed. */
2709 #define WP_VALUE_CHANGED 2
2710 /* The value has not changed. */
2711 #define WP_VALUE_NOT_CHANGED 3
2713 #define BP_TEMPFLAG 1
2714 #define BP_HARDWAREFLAG 2
2716 /* Check watchpoint condition. */
2719 watchpoint_check (void *p
)
2721 bpstat bs
= (bpstat
) p
;
2722 struct breakpoint
*b
;
2723 struct frame_info
*fr
;
2724 int within_current_scope
;
2726 b
= bs
->breakpoint_at
->owner
;
2728 if (b
->exp_valid_block
== NULL
)
2729 within_current_scope
= 1;
2732 /* There is no current frame at this moment. If we're going to have
2733 any chance of handling watchpoints on local variables, we'll need
2734 the frame chain (so we can determine if we're in scope). */
2735 reinit_frame_cache ();
2736 fr
= frame_find_by_id (b
->watchpoint_frame
);
2737 within_current_scope
= (fr
!= NULL
);
2739 /* If we've gotten confused in the unwinder, we might have
2740 returned a frame that can't describe this variable. */
2741 if (within_current_scope
2742 && (block_linkage_function (b
->exp_valid_block
)
2743 != get_frame_function (fr
)))
2744 within_current_scope
= 0;
2746 /* in_function_epilogue_p() returns a non-zero value if we're still
2747 in the function but the stack frame has already been invalidated.
2748 Since we can't rely on the values of local variables after the
2749 stack has been destroyed, we are treating the watchpoint in that
2750 state as `not changed' without further checking.
2752 vinschen/2003-09-04: The former implementation left out the case
2753 that the watchpoint frame couldn't be found by frame_find_by_id()
2754 because the current PC is currently in an epilogue. Calling
2755 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2756 if (!within_current_scope
|| fr
== get_current_frame ())
2758 struct frame_info
*frame
= get_current_frame ();
2759 struct gdbarch
*frame_arch
= get_frame_arch (frame
);
2760 CORE_ADDR frame_pc
= get_frame_pc (frame
);
2762 if (gdbarch_in_function_epilogue_p (frame_arch
, frame_pc
))
2763 return WP_VALUE_NOT_CHANGED
;
2765 if (fr
&& within_current_scope
)
2766 /* If we end up stopping, the current frame will get selected
2767 in normal_stop. So this call to select_frame won't affect
2772 if (within_current_scope
)
2774 /* We use value_{,free_to_}mark because it could be a
2775 *long* time before we return to the command level and
2776 call free_all_values. We can't call free_all_values because
2777 we might be in the middle of evaluating a function call. */
2779 struct value
*mark
= value_mark ();
2780 struct value
*new_val
;
2782 fetch_watchpoint_value (b
->exp
, &new_val
, NULL
, NULL
);
2783 if ((b
->val
!= NULL
) != (new_val
!= NULL
)
2784 || (b
->val
!= NULL
&& !value_equal (b
->val
, new_val
)))
2786 if (new_val
!= NULL
)
2788 release_value (new_val
);
2789 value_free_to_mark (mark
);
2791 bs
->old_val
= b
->val
;
2794 /* We will stop here */
2795 return WP_VALUE_CHANGED
;
2799 /* Nothing changed, don't do anything. */
2800 value_free_to_mark (mark
);
2801 /* We won't stop here */
2802 return WP_VALUE_NOT_CHANGED
;
2807 /* This seems like the only logical thing to do because
2808 if we temporarily ignored the watchpoint, then when
2809 we reenter the block in which it is valid it contains
2810 garbage (in the case of a function, it may have two
2811 garbage values, one before and one after the prologue).
2812 So we can't even detect the first assignment to it and
2813 watch after that (since the garbage may or may not equal
2814 the first value assigned). */
2815 /* We print all the stop information in print_it_typical(), but
2816 in this case, by the time we call print_it_typical() this bp
2817 will be deleted already. So we have no choice but print the
2818 information here. */
2819 if (ui_out_is_mi_like_p (uiout
))
2821 (uiout
, "reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_SCOPE
));
2822 ui_out_text (uiout
, "\nWatchpoint ");
2823 ui_out_field_int (uiout
, "wpnum", b
->number
);
2824 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2825 which its expression is valid.\n");
2827 if (b
->related_breakpoint
)
2828 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2829 b
->disposition
= disp_del_at_next_stop
;
2835 /* Return true if it looks like target has stopped due to hitting
2836 breakpoint location BL. This function does not check if we
2837 should stop, only if BL explains the stop. */
2839 bpstat_check_location (const struct bp_location
*bl
, CORE_ADDR bp_addr
)
2841 struct breakpoint
*b
= bl
->owner
;
2843 if (b
->type
!= bp_watchpoint
2844 && b
->type
!= bp_hardware_watchpoint
2845 && b
->type
!= bp_read_watchpoint
2846 && b
->type
!= bp_access_watchpoint
2847 && b
->type
!= bp_hardware_breakpoint
2848 && b
->type
!= bp_catchpoint
) /* a non-watchpoint bp */
2850 if (bl
->address
!= bp_addr
) /* address doesn't match */
2852 if (overlay_debugging
/* unmapped overlay section */
2853 && section_is_overlay (bl
->section
)
2854 && !section_is_mapped (bl
->section
))
2858 /* Continuable hardware watchpoints are treated as non-existent if the
2859 reason we stopped wasn't a hardware watchpoint (we didn't stop on
2860 some data address). Otherwise gdb won't stop on a break instruction
2861 in the code (not from a breakpoint) when a hardware watchpoint has
2862 been defined. Also skip watchpoints which we know did not trigger
2863 (did not match the data address). */
2865 if ((b
->type
== bp_hardware_watchpoint
2866 || b
->type
== bp_read_watchpoint
2867 || b
->type
== bp_access_watchpoint
)
2868 && b
->watchpoint_triggered
== watch_triggered_no
)
2871 if (b
->type
== bp_hardware_breakpoint
)
2873 if (bl
->address
!= bp_addr
)
2875 if (overlay_debugging
/* unmapped overlay section */
2876 && section_is_overlay (bl
->section
)
2877 && !section_is_mapped (bl
->section
))
2881 if (b
->type
== bp_catchpoint
)
2883 gdb_assert (b
->ops
!= NULL
&& b
->ops
->breakpoint_hit
!= NULL
);
2884 if (!b
->ops
->breakpoint_hit (b
))
2891 /* If BS refers to a watchpoint, determine if the watched values
2892 has actually changed, and we should stop. If not, set BS->stop
2895 bpstat_check_watchpoint (bpstat bs
)
2897 const struct bp_location
*bl
= bs
->breakpoint_at
;
2898 struct breakpoint
*b
= bl
->owner
;
2900 if (b
->type
== bp_watchpoint
2901 || b
->type
== bp_read_watchpoint
2902 || b
->type
== bp_access_watchpoint
2903 || b
->type
== bp_hardware_watchpoint
)
2907 int must_check_value
= 0;
2909 if (b
->type
== bp_watchpoint
)
2910 /* For a software watchpoint, we must always check the
2912 must_check_value
= 1;
2913 else if (b
->watchpoint_triggered
== watch_triggered_yes
)
2914 /* We have a hardware watchpoint (read, write, or access)
2915 and the target earlier reported an address watched by
2917 must_check_value
= 1;
2918 else if (b
->watchpoint_triggered
== watch_triggered_unknown
2919 && b
->type
== bp_hardware_watchpoint
)
2920 /* We were stopped by a hardware watchpoint, but the target could
2921 not report the data address. We must check the watchpoint's
2922 value. Access and read watchpoints are out of luck; without
2923 a data address, we can't figure it out. */
2924 must_check_value
= 1;
2926 if (must_check_value
)
2928 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2930 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2931 int e
= catch_errors (watchpoint_check
, bs
, message
,
2933 do_cleanups (cleanups
);
2937 /* We've already printed what needs to be printed. */
2938 bs
->print_it
= print_it_done
;
2941 case WP_VALUE_CHANGED
:
2942 if (b
->type
== bp_read_watchpoint
)
2944 /* Don't stop: read watchpoints shouldn't fire if
2945 the value has changed. This is for targets
2946 which cannot set read-only watchpoints. */
2947 bs
->print_it
= print_it_noop
;
2951 case WP_VALUE_NOT_CHANGED
:
2952 if (b
->type
== bp_hardware_watchpoint
2953 || b
->type
== bp_watchpoint
)
2955 /* Don't stop: write watchpoints shouldn't fire if
2956 the value hasn't changed. */
2957 bs
->print_it
= print_it_noop
;
2965 /* Error from catch_errors. */
2966 printf_filtered (_("Watchpoint %d deleted.\n"), b
->number
);
2967 if (b
->related_breakpoint
)
2968 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2969 b
->disposition
= disp_del_at_next_stop
;
2970 /* We've already printed what needs to be printed. */
2971 bs
->print_it
= print_it_done
;
2975 else /* must_check_value == 0 */
2977 /* This is a case where some watchpoint(s) triggered, but
2978 not at the address of this watchpoint, or else no
2979 watchpoint triggered after all. So don't print
2980 anything for this watchpoint. */
2981 bs
->print_it
= print_it_noop
;
2988 /* Check conditions (condition proper, frame, thread and ignore count)
2989 of breakpoint referred to by BS. If we should not stop for this
2990 breakpoint, set BS->stop to 0. */
2992 bpstat_check_breakpoint_conditions (bpstat bs
, ptid_t ptid
)
2994 int thread_id
= pid_to_thread_id (ptid
);
2995 const struct bp_location
*bl
= bs
->breakpoint_at
;
2996 struct breakpoint
*b
= bl
->owner
;
2998 if (frame_id_p (b
->frame_id
)
2999 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
3003 int value_is_zero
= 0;
3005 /* If this is a scope breakpoint, mark the associated
3006 watchpoint as triggered so that we will handle the
3007 out-of-scope event. We'll get to the watchpoint next
3009 if (b
->type
== bp_watchpoint_scope
)
3010 b
->related_breakpoint
->watchpoint_triggered
= watch_triggered_yes
;
3012 if (bl
->cond
&& bl
->owner
->disposition
!= disp_del_at_next_stop
)
3014 /* We use value_mark and value_free_to_mark because it could
3015 be a long time before we return to the command level and
3016 call free_all_values. We can't call free_all_values
3017 because we might be in the middle of evaluating a
3019 struct value
*mark
= value_mark ();
3021 /* Need to select the frame, with all that implies
3022 so that the conditions will have the right context. */
3023 select_frame (get_current_frame ());
3025 = catch_errors (breakpoint_cond_eval
, (bl
->cond
),
3026 "Error in testing breakpoint condition:\n",
3028 /* FIXME-someday, should give breakpoint # */
3029 value_free_to_mark (mark
);
3031 if (bl
->cond
&& value_is_zero
)
3035 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
3039 else if (b
->ignore_count
> 0)
3042 annotate_ignore_count_change ();
3044 /* Increase the hit count even though we don't
3052 /* Get a bpstat associated with having just stopped at address
3053 BP_ADDR in thread PTID.
3055 Determine whether we stopped at a breakpoint, etc, or whether we
3056 don't understand this stop. Result is a chain of bpstat's such that:
3058 if we don't understand the stop, the result is a null pointer.
3060 if we understand why we stopped, the result is not null.
3062 Each element of the chain refers to a particular breakpoint or
3063 watchpoint at which we have stopped. (We may have stopped for
3064 several reasons concurrently.)
3066 Each element of the chain has valid next, breakpoint_at,
3067 commands, FIXME??? fields. */
3070 bpstat_stop_status (CORE_ADDR bp_addr
, ptid_t ptid
)
3072 struct breakpoint
*b
= NULL
;
3073 const struct bp_location
*bl
;
3074 struct bp_location
*loc
;
3075 /* Root of the chain of bpstat's */
3076 struct bpstats root_bs
[1];
3077 /* Pointer to the last thing in the chain currently. */
3078 bpstat bs
= root_bs
;
3080 int need_remove_insert
;
3082 ALL_BP_LOCATIONS (bl
)
3086 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
3089 /* For hardware watchpoints, we look only at the first location.
3090 The watchpoint_check function will work on entire expression,
3091 not the individual locations. For read watchopints, the
3092 watchpoints_triggered function have checked all locations
3095 if (b
->type
== bp_hardware_watchpoint
&& bl
!= b
->loc
)
3098 if (!bpstat_check_location (bl
, bp_addr
))
3101 /* Come here if it's a watchpoint, or if the break address matches */
3103 bs
= bpstat_alloc (bl
, bs
); /* Alloc a bpstat to explain stop */
3105 /* Assume we stop. Should we find watchpoint that is not actually
3106 triggered, or if condition of breakpoint is false, we'll reset
3111 bpstat_check_watchpoint (bs
);
3115 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
3116 /* We do not stop for these. */
3119 bpstat_check_breakpoint_conditions (bs
, ptid
);
3125 /* We will stop here */
3126 if (b
->disposition
== disp_disable
)
3128 if (b
->enable_state
!= bp_permanent
)
3129 b
->enable_state
= bp_disabled
;
3130 update_global_location_list (0);
3134 bs
->commands
= b
->commands
;
3136 (strcmp ("silent", bs
->commands
->line
) == 0
3137 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
3139 bs
->commands
= bs
->commands
->next
;
3142 bs
->commands
= copy_command_lines (bs
->commands
);
3145 /* Print nothing for this entry if we dont stop or if we dont print. */
3146 if (bs
->stop
== 0 || bs
->print
== 0)
3147 bs
->print_it
= print_it_noop
;
3150 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
3152 if (loc
->address
== bp_addr
)
3154 bs
= bpstat_alloc (loc
, bs
);
3155 /* For hits of moribund locations, we should just proceed. */
3158 bs
->print_it
= print_it_noop
;
3162 bs
->next
= NULL
; /* Terminate the chain */
3163 bs
= root_bs
->next
; /* Re-grab the head of the chain */
3165 /* If we aren't stopping, the value of some hardware watchpoint may
3166 not have changed, but the intermediate memory locations we are
3167 watching may have. Don't bother if we're stopping; this will get
3169 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3173 need_remove_insert
= 0;
3175 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3177 && bs
->breakpoint_at
->owner
3178 && (bs
->breakpoint_at
->owner
->type
== bp_hardware_watchpoint
3179 || bs
->breakpoint_at
->owner
->type
== bp_read_watchpoint
3180 || bs
->breakpoint_at
->owner
->type
== bp_access_watchpoint
))
3182 /* remove/insert can invalidate bs->breakpoint_at, if this
3183 location is no longer used by the watchpoint. Prevent
3184 further code from trying to use it. */
3185 bs
->breakpoint_at
= NULL
;
3186 need_remove_insert
= 1;
3189 if (need_remove_insert
)
3191 remove_breakpoints ();
3192 insert_breakpoints ();
3195 return root_bs
->next
;
3198 /* Tell what to do about this bpstat. */
3200 bpstat_what (bpstat bs
)
3202 /* Classify each bpstat as one of the following. */
3205 /* This bpstat element has no effect on the main_action. */
3208 /* There was a watchpoint, stop but don't print. */
3211 /* There was a watchpoint, stop and print. */
3214 /* There was a breakpoint but we're not stopping. */
3217 /* There was a breakpoint, stop but don't print. */
3220 /* There was a breakpoint, stop and print. */
3223 /* We hit the longjmp breakpoint. */
3226 /* We hit the longjmp_resume breakpoint. */
3229 /* We hit the step_resume breakpoint. */
3232 /* We hit the shared library event breakpoint. */
3235 /* This is just used to count how many enums there are. */
3239 /* Here is the table which drives this routine. So that we can
3240 format it pretty, we define some abbreviations for the
3241 enum bpstat_what codes. */
3242 #define kc BPSTAT_WHAT_KEEP_CHECKING
3243 #define ss BPSTAT_WHAT_STOP_SILENT
3244 #define sn BPSTAT_WHAT_STOP_NOISY
3245 #define sgl BPSTAT_WHAT_SINGLE
3246 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
3247 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
3248 #define sr BPSTAT_WHAT_STEP_RESUME
3249 #define shl BPSTAT_WHAT_CHECK_SHLIBS
3251 /* "Can't happen." Might want to print an error message.
3252 abort() is not out of the question, but chances are GDB is just
3253 a bit confused, not unusable. */
3254 #define err BPSTAT_WHAT_STOP_NOISY
3256 /* Given an old action and a class, come up with a new action. */
3257 /* One interesting property of this table is that wp_silent is the same
3258 as bp_silent and wp_noisy is the same as bp_noisy. That is because
3259 after stopping, the check for whether to step over a breakpoint
3260 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
3261 reference to how we stopped. We retain separate wp_silent and
3262 bp_silent codes in case we want to change that someday.
3264 Another possibly interesting property of this table is that
3265 there's a partial ordering, priority-like, of the actions. Once
3266 you've decided that some action is appropriate, you'll never go
3267 back and decide something of a lower priority is better. The
3270 kc < clr sgl shl slr sn sr ss
3271 sgl < shl slr sn sr ss
3272 slr < err shl sn sr ss
3273 clr < err shl sn sr ss
3279 What I think this means is that we don't need a damned table
3280 here. If you just put the rows and columns in the right order,
3281 it'd look awfully regular. We could simply walk the bpstat list
3282 and choose the highest priority action we find, with a little
3283 logic to handle the 'err' cases. */
3285 /* step_resume entries: a step resume breakpoint overrides another
3286 breakpoint of signal handling (see comment in wait_for_inferior
3287 at where we set the step_resume breakpoint). */
3289 static const enum bpstat_what_main_action
3290 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3293 /* kc ss sn sgl slr clr sr shl
3296 {kc
, ss
, sn
, sgl
, slr
, clr
, sr
, shl
},
3298 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
},
3300 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
},
3302 {sgl
, ss
, sn
, sgl
, slr
, slr
, sr
, shl
},
3304 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
},
3306 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
},
3308 {slr
, ss
, sn
, slr
, slr
, err
, sr
, shl
},
3310 {clr
, ss
, sn
, err
, err
, err
, sr
, shl
},
3312 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
},
3314 {shl
, shl
, shl
, shl
, shl
, shl
, sr
, shl
}
3327 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3328 struct bpstat_what retval
;
3330 retval
.call_dummy
= 0;
3331 for (; bs
!= NULL
; bs
= bs
->next
)
3333 enum class bs_class
= no_effect
;
3334 if (bs
->breakpoint_at
== NULL
)
3335 /* I suspect this can happen if it was a momentary breakpoint
3336 which has since been deleted. */
3338 if (bs
->breakpoint_at
->owner
== NULL
)
3339 bs_class
= bp_nostop
;
3341 switch (bs
->breakpoint_at
->owner
->type
)
3347 case bp_hardware_breakpoint
:
3353 bs_class
= bp_noisy
;
3355 bs_class
= bp_silent
;
3358 bs_class
= bp_nostop
;
3361 case bp_hardware_watchpoint
:
3362 case bp_read_watchpoint
:
3363 case bp_access_watchpoint
:
3367 bs_class
= wp_noisy
;
3369 bs_class
= wp_silent
;
3372 /* There was a watchpoint, but we're not stopping.
3373 This requires no further action. */
3374 bs_class
= no_effect
;
3377 bs_class
= long_jump
;
3379 case bp_longjmp_resume
:
3380 bs_class
= long_resume
;
3382 case bp_step_resume
:
3385 bs_class
= step_resume
;
3388 /* It is for the wrong frame. */
3389 bs_class
= bp_nostop
;
3391 case bp_watchpoint_scope
:
3392 bs_class
= bp_nostop
;
3394 case bp_shlib_event
:
3395 bs_class
= shlib_event
;
3397 case bp_thread_event
:
3398 case bp_overlay_event
:
3399 bs_class
= bp_nostop
;
3405 bs_class
= bp_noisy
;
3407 bs_class
= bp_silent
;
3410 /* There was a catchpoint, but we're not stopping.
3411 This requires no further action. */
3412 bs_class
= no_effect
;
3415 /* Make sure the action is stop (silent or noisy),
3416 so infrun.c pops the dummy frame. */
3417 bs_class
= bp_silent
;
3418 retval
.call_dummy
= 1;
3421 /* Tracepoint hits should not be reported back to GDB, and
3422 if one got through somehow, it should have been filtered
3424 internal_error (__FILE__
, __LINE__
,
3425 _("bpstat_what: bp_tracepoint encountered"));
3428 current_action
= table
[(int) bs_class
][(int) current_action
];
3430 retval
.main_action
= current_action
;
3434 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3435 without hardware support). This isn't related to a specific bpstat,
3436 just to things like whether watchpoints are set. */
3439 bpstat_should_step (void)
3441 struct breakpoint
*b
;
3443 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
&& b
->loc
!= NULL
)
3450 static void print_breakpoint_location (struct breakpoint
*b
,
3451 struct bp_location
*loc
,
3453 struct ui_stream
*stb
)
3458 = find_pc_sect_function (loc
->address
, loc
->section
);
3461 ui_out_text (uiout
, "in ");
3462 ui_out_field_string (uiout
, "func",
3463 SYMBOL_PRINT_NAME (sym
));
3464 ui_out_wrap_hint (uiout
, wrap_indent
);
3465 ui_out_text (uiout
, " at ");
3467 ui_out_field_string (uiout
, "file", b
->source_file
);
3468 ui_out_text (uiout
, ":");
3470 if (ui_out_is_mi_like_p (uiout
))
3472 struct symtab_and_line sal
= find_pc_line (loc
->address
, 0);
3473 char *fullname
= symtab_to_fullname (sal
.symtab
);
3476 ui_out_field_string (uiout
, "fullname", fullname
);
3479 ui_out_field_int (uiout
, "line", b
->line_number
);
3483 ui_out_field_string (uiout
, "pending", b
->addr_string
);
3487 print_address_symbolic (loc
->address
, stb
->stream
, demangle
, "");
3488 ui_out_field_stream (uiout
, "at", stb
);
3492 /* Print B to gdb_stdout. */
3494 print_one_breakpoint_location (struct breakpoint
*b
,
3495 struct bp_location
*loc
,
3497 CORE_ADDR
*last_addr
)
3499 struct command_line
*l
;
3501 struct ep_type_description
3506 static struct ep_type_description bptypes
[] =
3508 {bp_none
, "?deleted?"},
3509 {bp_breakpoint
, "breakpoint"},
3510 {bp_hardware_breakpoint
, "hw breakpoint"},
3511 {bp_until
, "until"},
3512 {bp_finish
, "finish"},
3513 {bp_watchpoint
, "watchpoint"},
3514 {bp_hardware_watchpoint
, "hw watchpoint"},
3515 {bp_read_watchpoint
, "read watchpoint"},
3516 {bp_access_watchpoint
, "acc watchpoint"},
3517 {bp_longjmp
, "longjmp"},
3518 {bp_longjmp_resume
, "longjmp resume"},
3519 {bp_step_resume
, "step resume"},
3520 {bp_watchpoint_scope
, "watchpoint scope"},
3521 {bp_call_dummy
, "call dummy"},
3522 {bp_shlib_event
, "shlib events"},
3523 {bp_thread_event
, "thread events"},
3524 {bp_overlay_event
, "overlay events"},
3525 {bp_catchpoint
, "catchpoint"},
3526 {bp_tracepoint
, "tracepoint"},
3529 static char bpenables
[] = "nynny";
3530 char wrap_indent
[80];
3531 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3532 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3533 struct cleanup
*bkpt_chain
;
3535 int header_of_multiple
= 0;
3536 int part_of_multiple
= (loc
!= NULL
);
3537 struct value_print_options opts
;
3539 get_user_print_options (&opts
);
3541 gdb_assert (!loc
|| loc_number
!= 0);
3542 /* See comment in print_one_breakpoint concerning
3543 treatment of breakpoints with single disabled
3547 && (b
->loc
->next
!= NULL
|| !b
->loc
->enabled
)))
3548 header_of_multiple
= 1;
3553 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3557 if (part_of_multiple
)
3560 formatted
= xstrprintf ("%d.%d", b
->number
, loc_number
);
3561 ui_out_field_string (uiout
, "number", formatted
);
3566 ui_out_field_int (uiout
, "number", b
->number
);
3571 if (part_of_multiple
)
3572 ui_out_field_skip (uiout
, "type");
3575 if (((int) b
->type
>= (sizeof (bptypes
) / sizeof (bptypes
[0])))
3576 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3577 internal_error (__FILE__
, __LINE__
,
3578 _("bptypes table does not describe type #%d."),
3580 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3585 if (part_of_multiple
)
3586 ui_out_field_skip (uiout
, "disp");
3588 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
3593 if (part_of_multiple
)
3594 ui_out_field_string (uiout
, "enabled", loc
->enabled
? "y" : "n");
3596 ui_out_field_fmt (uiout
, "enabled", "%c",
3597 bpenables
[(int) b
->enable_state
]);
3598 ui_out_spaces (uiout
, 2);
3602 strcpy (wrap_indent
, " ");
3603 if (opts
.addressprint
)
3605 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3606 strcat (wrap_indent
, " ");
3608 strcat (wrap_indent
, " ");
3611 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3613 /* Although the print_one can possibly print
3614 all locations, calling it here is not likely
3615 to get any nice result. So, make sure there's
3616 just one location. */
3617 gdb_assert (b
->loc
== NULL
|| b
->loc
->next
== NULL
);
3618 b
->ops
->print_one (b
, last_addr
);
3624 internal_error (__FILE__
, __LINE__
,
3625 _("print_one_breakpoint: bp_none encountered\n"));
3629 case bp_hardware_watchpoint
:
3630 case bp_read_watchpoint
:
3631 case bp_access_watchpoint
:
3632 /* Field 4, the address, is omitted (which makes the columns
3633 not line up too nicely with the headers, but the effect
3634 is relatively readable). */
3635 if (opts
.addressprint
)
3636 ui_out_field_skip (uiout
, "addr");
3638 ui_out_field_string (uiout
, "what", b
->exp_string
);
3642 case bp_hardware_breakpoint
:
3646 case bp_longjmp_resume
:
3647 case bp_step_resume
:
3648 case bp_watchpoint_scope
:
3650 case bp_shlib_event
:
3651 case bp_thread_event
:
3652 case bp_overlay_event
:
3654 if (opts
.addressprint
)
3657 if (header_of_multiple
)
3658 ui_out_field_string (uiout
, "addr", "<MULTIPLE>");
3659 else if (b
->loc
== NULL
|| loc
->shlib_disabled
)
3660 ui_out_field_string (uiout
, "addr", "<PENDING>");
3662 ui_out_field_core_addr (uiout
, "addr", loc
->address
);
3665 if (!header_of_multiple
)
3666 print_breakpoint_location (b
, loc
, wrap_indent
, stb
);
3668 *last_addr
= b
->loc
->address
;
3672 if (!part_of_multiple
)
3674 if (b
->thread
!= -1)
3676 /* FIXME: This seems to be redundant and lost here; see the
3677 "stop only in" line a little further down. */
3678 ui_out_text (uiout
, " thread ");
3679 ui_out_field_int (uiout
, "thread", b
->thread
);
3681 else if (b
->task
!= 0)
3683 ui_out_text (uiout
, " task ");
3684 ui_out_field_int (uiout
, "task", b
->task
);
3688 ui_out_text (uiout
, "\n");
3690 if (part_of_multiple
&& frame_id_p (b
->frame_id
))
3693 ui_out_text (uiout
, "\tstop only in stack frame at ");
3694 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3696 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3697 ui_out_text (uiout
, "\n");
3700 if (!part_of_multiple
&& b
->cond_string
&& !ada_exception_catchpoint_p (b
))
3702 /* We do not print the condition for Ada exception catchpoints
3703 because the condition is an internal implementation detail
3704 that we do not want to expose to the user. */
3706 if (b
->type
== bp_tracepoint
)
3707 ui_out_text (uiout
, "\ttrace only if ");
3709 ui_out_text (uiout
, "\tstop only if ");
3710 ui_out_field_string (uiout
, "cond", b
->cond_string
);
3711 ui_out_text (uiout
, "\n");
3714 if (!part_of_multiple
&& b
->thread
!= -1)
3716 /* FIXME should make an annotation for this */
3717 ui_out_text (uiout
, "\tstop only in thread ");
3718 ui_out_field_int (uiout
, "thread", b
->thread
);
3719 ui_out_text (uiout
, "\n");
3722 if (!part_of_multiple
&& b
->hit_count
)
3724 /* FIXME should make an annotation for this */
3725 if (ep_is_catchpoint (b
))
3726 ui_out_text (uiout
, "\tcatchpoint");
3728 ui_out_text (uiout
, "\tbreakpoint");
3729 ui_out_text (uiout
, " already hit ");
3730 ui_out_field_int (uiout
, "times", b
->hit_count
);
3731 if (b
->hit_count
== 1)
3732 ui_out_text (uiout
, " time\n");
3734 ui_out_text (uiout
, " times\n");
3737 /* Output the count also if it is zero, but only if this is
3738 mi. FIXME: Should have a better test for this. */
3739 if (ui_out_is_mi_like_p (uiout
))
3740 if (!part_of_multiple
&& b
->hit_count
== 0)
3741 ui_out_field_int (uiout
, "times", b
->hit_count
);
3743 if (!part_of_multiple
&& b
->ignore_count
)
3746 ui_out_text (uiout
, "\tignore next ");
3747 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3748 ui_out_text (uiout
, " hits\n");
3751 if (!part_of_multiple
&& (l
= b
->commands
))
3753 struct cleanup
*script_chain
;
3756 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3757 print_command_lines (uiout
, l
, 4);
3758 do_cleanups (script_chain
);
3761 if (!part_of_multiple
&& b
->pass_count
)
3763 annotate_field (10);
3764 ui_out_text (uiout
, "\tpass count ");
3765 ui_out_field_int (uiout
, "pass", b
->pass_count
);
3766 ui_out_text (uiout
, " \n");
3769 if (!part_of_multiple
&& b
->step_count
)
3771 annotate_field (11);
3772 ui_out_text (uiout
, "\tstep count ");
3773 ui_out_field_int (uiout
, "step", b
->step_count
);
3774 ui_out_text (uiout
, " \n");
3777 if (!part_of_multiple
&& b
->actions
)
3779 struct action_line
*action
;
3780 annotate_field (12);
3781 for (action
= b
->actions
; action
; action
= action
->next
)
3783 ui_out_text (uiout
, " A\t");
3784 ui_out_text (uiout
, action
->action
);
3785 ui_out_text (uiout
, "\n");
3789 if (ui_out_is_mi_like_p (uiout
) && !part_of_multiple
)
3792 ui_out_field_string (uiout
, "original-location", b
->addr_string
);
3793 else if (b
->exp_string
)
3794 ui_out_field_string (uiout
, "original-location", b
->exp_string
);
3797 do_cleanups (bkpt_chain
);
3798 do_cleanups (old_chain
);
3802 print_one_breakpoint (struct breakpoint
*b
,
3803 CORE_ADDR
*last_addr
)
3805 print_one_breakpoint_location (b
, NULL
, 0, last_addr
);
3807 /* If this breakpoint has custom print function,
3808 it's already printed. Otherwise, print individual
3809 locations, if any. */
3810 if (b
->ops
== NULL
|| b
->ops
->print_one
== NULL
)
3812 /* If breakpoint has a single location that is
3813 disabled, we print it as if it had
3814 several locations, since otherwise it's hard to
3815 represent "breakpoint enabled, location disabled"
3817 Note that while hardware watchpoints have
3818 several locations internally, that's no a property
3821 && !is_hardware_watchpoint (b
)
3822 && (b
->loc
->next
|| !b
->loc
->enabled
)
3823 && !ui_out_is_mi_like_p (uiout
))
3825 struct bp_location
*loc
;
3827 for (loc
= b
->loc
; loc
; loc
= loc
->next
, ++n
)
3828 print_one_breakpoint_location (b
, loc
, n
, last_addr
);
3834 struct captured_breakpoint_query_args
3840 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3842 struct captured_breakpoint_query_args
*args
= data
;
3843 struct breakpoint
*b
;
3844 CORE_ADDR dummy_addr
= 0;
3847 if (args
->bnum
== b
->number
)
3849 print_one_breakpoint (b
, &dummy_addr
);
3857 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
, char **error_message
)
3859 struct captured_breakpoint_query_args args
;
3861 /* For the moment we don't trust print_one_breakpoint() to not throw
3863 if (catch_exceptions_with_msg (uiout
, do_captured_breakpoint_query
, &args
,
3864 error_message
, RETURN_MASK_ALL
) < 0)
3870 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3871 catchpoints, et.al.). */
3874 user_settable_breakpoint (const struct breakpoint
*b
)
3876 return (b
->type
== bp_breakpoint
3877 || b
->type
== bp_catchpoint
3878 || b
->type
== bp_hardware_breakpoint
3879 || b
->type
== bp_tracepoint
3880 || b
->type
== bp_watchpoint
3881 || b
->type
== bp_read_watchpoint
3882 || b
->type
== bp_access_watchpoint
3883 || b
->type
== bp_hardware_watchpoint
);
3886 /* Print information on user settable breakpoint (watchpoint, etc)
3887 number BNUM. If BNUM is -1 print all user settable breakpoints.
3888 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3891 breakpoint_1 (int bnum
, int allflag
)
3893 struct breakpoint
*b
;
3894 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3895 int nr_printable_breakpoints
;
3896 struct cleanup
*bkpttbl_chain
;
3897 struct value_print_options opts
;
3899 get_user_print_options (&opts
);
3901 /* Compute the number of rows in the table. */
3902 nr_printable_breakpoints
= 0;
3905 || bnum
== b
->number
)
3907 if (allflag
|| user_settable_breakpoint (b
))
3908 nr_printable_breakpoints
++;
3911 if (opts
.addressprint
)
3913 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3917 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3920 if (nr_printable_breakpoints
> 0)
3921 annotate_breakpoints_headers ();
3922 if (nr_printable_breakpoints
> 0)
3924 ui_out_table_header (uiout
, 7, ui_left
, "number", "Num"); /* 1 */
3925 if (nr_printable_breakpoints
> 0)
3927 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3928 if (nr_printable_breakpoints
> 0)
3930 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3931 if (nr_printable_breakpoints
> 0)
3933 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3934 if (opts
.addressprint
)
3936 if (nr_printable_breakpoints
> 0)
3938 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3939 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3941 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3943 if (nr_printable_breakpoints
> 0)
3945 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3946 ui_out_table_body (uiout
);
3947 if (nr_printable_breakpoints
> 0)
3948 annotate_breakpoints_table ();
3952 || bnum
== b
->number
)
3954 /* We only print out user settable breakpoints unless the
3956 if (allflag
|| user_settable_breakpoint (b
))
3957 print_one_breakpoint (b
, &last_addr
);
3960 do_cleanups (bkpttbl_chain
);
3962 if (nr_printable_breakpoints
== 0)
3965 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3967 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3972 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3973 that a comparison of an unsigned with -1 is always false. */
3974 if (last_addr
!= (CORE_ADDR
) -1 && !server_command
)
3975 set_next_address (current_gdbarch
, last_addr
);
3978 /* FIXME? Should this be moved up so that it is only called when
3979 there have been breakpoints? */
3980 annotate_breakpoints_table_end ();
3984 breakpoints_info (char *bnum_exp
, int from_tty
)
3989 bnum
= parse_and_eval_long (bnum_exp
);
3991 breakpoint_1 (bnum
, 0);
3995 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
4000 bnum
= parse_and_eval_long (bnum_exp
);
4002 breakpoint_1 (bnum
, 1);
4006 breakpoint_has_pc (struct breakpoint
*b
,
4007 CORE_ADDR pc
, struct obj_section
*section
)
4009 struct bp_location
*bl
= b
->loc
;
4010 for (; bl
; bl
= bl
->next
)
4012 if (bl
->address
== pc
4013 && (!overlay_debugging
|| bl
->section
== section
))
4019 /* Print a message describing any breakpoints set at PC. */
4022 describe_other_breakpoints (CORE_ADDR pc
, struct obj_section
*section
,
4026 struct breakpoint
*b
;
4029 others
+= breakpoint_has_pc (b
, pc
, section
);
4033 printf_filtered (_("Note: breakpoint "));
4034 else /* if (others == ???) */
4035 printf_filtered (_("Note: breakpoints "));
4037 if (breakpoint_has_pc (b
, pc
, section
))
4040 printf_filtered ("%d", b
->number
);
4041 if (b
->thread
== -1 && thread
!= -1)
4042 printf_filtered (" (all threads)");
4043 else if (b
->thread
!= -1)
4044 printf_filtered (" (thread %d)", b
->thread
);
4045 printf_filtered ("%s%s ",
4046 ((b
->enable_state
== bp_disabled
||
4047 b
->enable_state
== bp_call_disabled
)
4049 : b
->enable_state
== bp_permanent
4053 : ((others
== 1) ? " and" : ""));
4055 printf_filtered (_("also set at pc "));
4056 fputs_filtered (paddress (pc
), gdb_stdout
);
4057 printf_filtered (".\n");
4061 /* Set the default place to put a breakpoint
4062 for the `break' command with no arguments. */
4065 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
4068 default_breakpoint_valid
= valid
;
4069 default_breakpoint_address
= addr
;
4070 default_breakpoint_symtab
= symtab
;
4071 default_breakpoint_line
= line
;
4074 /* Return true iff it is meaningful to use the address member of
4075 BPT. For some breakpoint types, the address member is irrelevant
4076 and it makes no sense to attempt to compare it to other addresses
4077 (or use it for any other purpose either).
4079 More specifically, each of the following breakpoint types will always
4080 have a zero valued address and we don't want check_duplicates() to mark
4081 breakpoints of any of these types to be a duplicate of an actual
4082 breakpoint at address zero:
4085 bp_hardware_watchpoint
4087 bp_access_watchpoint
4091 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
4093 enum bptype type
= bpt
->type
;
4095 return (type
!= bp_watchpoint
4096 && type
!= bp_hardware_watchpoint
4097 && type
!= bp_read_watchpoint
4098 && type
!= bp_access_watchpoint
4099 && type
!= bp_catchpoint
);
4102 /* Rescan breakpoints at the same address and section as BPT,
4103 marking the first one as "first" and any others as "duplicates".
4104 This is so that the bpt instruction is only inserted once.
4105 If we have a permanent breakpoint at the same place as BPT, make
4106 that one the official one, and the rest as duplicates. */
4109 check_duplicates_for (CORE_ADDR address
, struct obj_section
*section
)
4111 struct bp_location
*b
;
4113 struct bp_location
*perm_bp
= 0;
4115 ALL_BP_LOCATIONS (b
)
4116 if (b
->owner
->enable_state
!= bp_disabled
4117 && b
->owner
->enable_state
!= bp_call_disabled
4119 && !b
->shlib_disabled
4120 && b
->address
== address
/* address / overlay match */
4121 && (!overlay_debugging
|| b
->section
== section
)
4122 && breakpoint_address_is_meaningful (b
->owner
))
4124 /* Have we found a permanent breakpoint? */
4125 if (b
->owner
->enable_state
== bp_permanent
)
4132 b
->duplicate
= count
> 1;
4135 /* If we found a permanent breakpoint at this address, go over the
4136 list again and declare all the other breakpoints there (except
4137 other permanent breakpoints) to be the duplicates. */
4140 perm_bp
->duplicate
= 0;
4142 /* Permanent breakpoint should always be inserted. */
4143 if (! perm_bp
->inserted
)
4144 internal_error (__FILE__
, __LINE__
,
4145 _("allegedly permanent breakpoint is not "
4146 "actually inserted"));
4148 ALL_BP_LOCATIONS (b
)
4151 if (b
->owner
->enable_state
!= bp_permanent
4152 && b
->owner
->enable_state
!= bp_disabled
4153 && b
->owner
->enable_state
!= bp_call_disabled
4154 && b
->enabled
&& !b
->shlib_disabled
4155 && b
->address
== address
/* address / overlay match */
4156 && (!overlay_debugging
|| b
->section
== section
)
4157 && breakpoint_address_is_meaningful (b
->owner
))
4160 internal_error (__FILE__
, __LINE__
,
4161 _("another breakpoint was inserted on top of "
4162 "a permanent breakpoint"));
4171 check_duplicates (struct breakpoint
*bpt
)
4173 struct bp_location
*bl
= bpt
->loc
;
4175 if (! breakpoint_address_is_meaningful (bpt
))
4178 for (; bl
; bl
= bl
->next
)
4179 check_duplicates_for (bl
->address
, bl
->section
);
4183 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
4184 int bnum
, int have_bnum
)
4189 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
4190 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
4192 warning (_("Breakpoint %d address previously adjusted from %s to %s."),
4193 bnum
, astr1
, astr2
);
4195 warning (_("Breakpoint address adjusted from %s to %s."), astr1
, astr2
);
4198 /* Adjust a breakpoint's address to account for architectural constraints
4199 on breakpoint placement. Return the adjusted address. Note: Very
4200 few targets require this kind of adjustment. For most targets,
4201 this function is simply the identity function. */
4204 adjust_breakpoint_address (CORE_ADDR bpaddr
, enum bptype bptype
)
4206 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
4208 /* Very few targets need any kind of breakpoint adjustment. */
4211 else if (bptype
== bp_watchpoint
4212 || bptype
== bp_hardware_watchpoint
4213 || bptype
== bp_read_watchpoint
4214 || bptype
== bp_access_watchpoint
4215 || bptype
== bp_catchpoint
)
4217 /* Watchpoints and the various bp_catch_* eventpoints should not
4218 have their addresses modified. */
4223 CORE_ADDR adjusted_bpaddr
;
4225 /* Some targets have architectural constraints on the placement
4226 of breakpoint instructions. Obtain the adjusted address. */
4227 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
4230 /* An adjusted breakpoint address can significantly alter
4231 a user's expectations. Print a warning if an adjustment
4233 if (adjusted_bpaddr
!= bpaddr
)
4234 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
4236 return adjusted_bpaddr
;
4240 /* Allocate a struct bp_location. */
4242 static struct bp_location
*
4243 allocate_bp_location (struct breakpoint
*bpt
)
4245 struct bp_location
*loc
, *loc_p
;
4247 loc
= xmalloc (sizeof (struct bp_location
));
4248 memset (loc
, 0, sizeof (*loc
));
4252 loc
->shlib_disabled
= 0;
4262 case bp_longjmp_resume
:
4263 case bp_step_resume
:
4264 case bp_watchpoint_scope
:
4266 case bp_shlib_event
:
4267 case bp_thread_event
:
4268 case bp_overlay_event
:
4269 loc
->loc_type
= bp_loc_software_breakpoint
;
4271 case bp_hardware_breakpoint
:
4272 loc
->loc_type
= bp_loc_hardware_breakpoint
;
4274 case bp_hardware_watchpoint
:
4275 case bp_read_watchpoint
:
4276 case bp_access_watchpoint
:
4277 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4281 loc
->loc_type
= bp_loc_other
;
4284 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
4290 static void free_bp_location (struct bp_location
*loc
)
4295 if (loc
->function_name
)
4296 xfree (loc
->function_name
);
4301 /* Helper to set_raw_breakpoint below. Creates a breakpoint
4302 that has type BPTYPE and has no locations as yet. */
4304 static struct breakpoint
*
4305 set_raw_breakpoint_without_location (enum bptype bptype
)
4307 struct breakpoint
*b
, *b1
;
4309 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4310 memset (b
, 0, sizeof (*b
));
4313 b
->language
= current_language
->la_language
;
4314 b
->input_radix
= input_radix
;
4316 b
->enable_state
= bp_enabled
;
4319 b
->ignore_count
= 0;
4321 b
->frame_id
= null_frame_id
;
4322 b
->forked_inferior_pid
= null_ptid
;
4323 b
->exec_pathname
= NULL
;
4325 b
->condition_not_parsed
= 0;
4327 /* Add this breakpoint to the end of the chain
4328 so that a list of breakpoints will come out in order
4329 of increasing numbers. */
4331 b1
= breakpoint_chain
;
4333 breakpoint_chain
= b
;
4343 /* Initialize loc->function_name. */
4345 set_breakpoint_location_function (struct bp_location
*loc
)
4347 if (loc
->owner
->type
== bp_breakpoint
4348 || loc
->owner
->type
== bp_hardware_breakpoint
4349 || loc
->owner
->type
== bp_tracepoint
)
4351 find_pc_partial_function (loc
->address
, &(loc
->function_name
),
4353 if (loc
->function_name
)
4354 loc
->function_name
= xstrdup (loc
->function_name
);
4358 /* set_raw_breakpoint is a low level routine for allocating and
4359 partially initializing a breakpoint of type BPTYPE. The newly
4360 created breakpoint's address, section, source file name, and line
4361 number are provided by SAL. The newly created and partially
4362 initialized breakpoint is added to the breakpoint chain and
4363 is also returned as the value of this function.
4365 It is expected that the caller will complete the initialization of
4366 the newly created breakpoint struct as well as output any status
4367 information regarding the creation of a new breakpoint. In
4368 particular, set_raw_breakpoint does NOT set the breakpoint
4369 number! Care should be taken to not allow an error to occur
4370 prior to completing the initialization of the breakpoint. If this
4371 should happen, a bogus breakpoint will be left on the chain. */
4374 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4376 struct breakpoint
*b
= set_raw_breakpoint_without_location (bptype
);
4377 CORE_ADDR adjusted_address
;
4379 /* Adjust the breakpoint's address prior to allocating a location.
4380 Once we call allocate_bp_location(), that mostly uninitialized
4381 location will be placed on the location chain. Adjustment of the
4382 breakpoint may cause target_read_memory() to be called and we do
4383 not want its scan of the location chain to find a breakpoint and
4384 location that's only been partially initialized. */
4385 adjusted_address
= adjust_breakpoint_address (sal
.pc
, b
->type
);
4387 b
->loc
= allocate_bp_location (b
);
4388 b
->loc
->requested_address
= sal
.pc
;
4389 b
->loc
->address
= adjusted_address
;
4391 if (sal
.symtab
== NULL
)
4392 b
->source_file
= NULL
;
4394 b
->source_file
= xstrdup (sal
.symtab
->filename
);
4395 b
->loc
->section
= sal
.section
;
4396 b
->line_number
= sal
.line
;
4398 set_breakpoint_location_function (b
->loc
);
4400 breakpoints_changed ();
4406 /* Note that the breakpoint object B describes a permanent breakpoint
4407 instruction, hard-wired into the inferior's code. */
4409 make_breakpoint_permanent (struct breakpoint
*b
)
4411 struct bp_location
*bl
;
4412 b
->enable_state
= bp_permanent
;
4414 /* By definition, permanent breakpoints are already present in the code.
4415 Mark all locations as inserted. For now, make_breakpoint_permanent
4416 is called in just one place, so it's hard to say if it's reasonable
4417 to have permanent breakpoint with multiple locations or not,
4418 but it's easy to implmement. */
4419 for (bl
= b
->loc
; bl
; bl
= bl
->next
)
4424 create_longjmp_breakpoint (char *func_name
)
4426 struct minimal_symbol
*m
;
4428 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4430 set_momentary_breakpoint_at_pc (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4431 update_global_location_list (1);
4434 /* Call this routine when stepping and nexting to enable a breakpoint
4435 if we do a longjmp(). When we hit that breakpoint, call
4436 set_longjmp_resume_breakpoint() to figure out where we are going. */
4439 set_longjmp_breakpoint (void)
4441 if (gdbarch_get_longjmp_target_p (current_gdbarch
))
4443 create_longjmp_breakpoint ("longjmp");
4444 create_longjmp_breakpoint ("_longjmp");
4445 create_longjmp_breakpoint ("siglongjmp");
4446 create_longjmp_breakpoint ("_siglongjmp");
4450 /* Delete all longjmp breakpoints from THREAD. */
4452 delete_longjmp_breakpoint (int thread
)
4454 struct breakpoint
*b
, *temp
;
4456 ALL_BREAKPOINTS_SAFE (b
, temp
)
4457 if (b
->type
== bp_longjmp
)
4459 if (b
->thread
== thread
)
4460 delete_breakpoint (b
);
4465 enable_overlay_breakpoints (void)
4467 struct breakpoint
*b
;
4470 if (b
->type
== bp_overlay_event
)
4472 b
->enable_state
= bp_enabled
;
4473 update_global_location_list (1);
4474 overlay_events_enabled
= 1;
4479 disable_overlay_breakpoints (void)
4481 struct breakpoint
*b
;
4484 if (b
->type
== bp_overlay_event
)
4486 b
->enable_state
= bp_disabled
;
4487 update_global_location_list (0);
4488 overlay_events_enabled
= 0;
4493 create_thread_event_breakpoint (CORE_ADDR address
)
4495 struct breakpoint
*b
;
4497 b
= create_internal_breakpoint (address
, bp_thread_event
);
4499 b
->enable_state
= bp_enabled
;
4500 /* addr_string has to be used or breakpoint_re_set will delete me. */
4501 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4503 update_global_location_list_nothrow (1);
4509 remove_thread_event_breakpoints (void)
4511 struct breakpoint
*b
, *temp
;
4513 ALL_BREAKPOINTS_SAFE (b
, temp
)
4514 if (b
->type
== bp_thread_event
)
4515 delete_breakpoint (b
);
4518 struct captured_parse_breakpoint_args
4521 struct symtabs_and_lines
*sals_p
;
4522 char ***addr_string_p
;
4526 struct lang_and_radix
4534 remove_solib_event_breakpoints (void)
4536 struct breakpoint
*b
, *temp
;
4538 ALL_BREAKPOINTS_SAFE (b
, temp
)
4539 if (b
->type
== bp_shlib_event
)
4540 delete_breakpoint (b
);
4544 create_solib_event_breakpoint (CORE_ADDR address
)
4546 struct breakpoint
*b
;
4548 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4549 update_global_location_list_nothrow (1);
4553 /* Disable any breakpoints that are on code in shared libraries. Only
4554 apply to enabled breakpoints, disabled ones can just stay disabled. */
4557 disable_breakpoints_in_shlibs (void)
4559 struct bp_location
*loc
;
4561 ALL_BP_LOCATIONS (loc
)
4563 struct breakpoint
*b
= loc
->owner
;
4564 /* We apply the check to all breakpoints, including disabled
4565 for those with loc->duplicate set. This is so that when breakpoint
4566 becomes enabled, or the duplicate is removed, gdb will try to insert
4567 all breakpoints. If we don't set shlib_disabled here, we'll try
4568 to insert those breakpoints and fail. */
4569 if (((b
->type
== bp_breakpoint
)
4570 || (b
->type
== bp_hardware_breakpoint
)
4571 || (b
->type
== bp_tracepoint
))
4572 && !loc
->shlib_disabled
4574 && PC_SOLIB (loc
->address
)
4576 && solib_name_from_address (loc
->address
)
4580 loc
->shlib_disabled
= 1;
4585 /* Disable any breakpoints that are in in an unloaded shared library. Only
4586 apply to enabled breakpoints, disabled ones can just stay disabled. */
4589 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
4591 struct bp_location
*loc
;
4592 int disabled_shlib_breaks
= 0;
4594 /* SunOS a.out shared libraries are always mapped, so do not
4595 disable breakpoints; they will only be reported as unloaded
4596 through clear_solib when GDB discards its shared library
4597 list. See clear_solib for more information. */
4598 if (exec_bfd
!= NULL
4599 && bfd_get_flavour (exec_bfd
) == bfd_target_aout_flavour
)
4602 ALL_BP_LOCATIONS (loc
)
4604 struct breakpoint
*b
= loc
->owner
;
4605 if ((loc
->loc_type
== bp_loc_hardware_breakpoint
4606 || loc
->loc_type
== bp_loc_software_breakpoint
)
4607 && !loc
->shlib_disabled
4608 && (b
->type
== bp_breakpoint
|| b
->type
== bp_hardware_breakpoint
)
4609 && solib_contains_address_p (solib
, loc
->address
))
4611 loc
->shlib_disabled
= 1;
4612 /* At this point, we cannot rely on remove_breakpoint
4613 succeeding so we must mark the breakpoint as not inserted
4614 to prevent future errors occurring in remove_breakpoints. */
4616 if (!disabled_shlib_breaks
)
4618 target_terminal_ours_for_output ();
4619 warning (_("Temporarily disabling breakpoints for unloaded shared library \"%s\""),
4622 disabled_shlib_breaks
= 1;
4627 /* FORK & VFORK catchpoints. */
4629 /* Implement the "insert" breakpoint_ops method for fork catchpoints. */
4632 insert_catch_fork (struct breakpoint
*b
)
4634 target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
4637 /* Implement the "remove" breakpoint_ops method for fork catchpoints. */
4640 remove_catch_fork (struct breakpoint
*b
)
4642 return target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
4645 /* Implement the "breakpoint_hit" breakpoint_ops method for fork
4649 breakpoint_hit_catch_fork (struct breakpoint
*b
)
4651 return inferior_has_forked (inferior_ptid
, &b
->forked_inferior_pid
);
4654 /* Implement the "print_it" breakpoint_ops method for fork catchpoints. */
4656 static enum print_stop_action
4657 print_it_catch_fork (struct breakpoint
*b
)
4659 annotate_catchpoint (b
->number
);
4660 printf_filtered (_("\nCatchpoint %d (forked process %d), "),
4661 b
->number
, ptid_get_pid (b
->forked_inferior_pid
));
4662 return PRINT_SRC_AND_LOC
;
4665 /* Implement the "print_one" breakpoint_ops method for fork catchpoints. */
4668 print_one_catch_fork (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
4670 struct value_print_options opts
;
4672 get_user_print_options (&opts
);
4674 /* Field 4, the address, is omitted (which makes the columns
4675 not line up too nicely with the headers, but the effect
4676 is relatively readable). */
4677 if (opts
.addressprint
)
4678 ui_out_field_skip (uiout
, "addr");
4680 ui_out_text (uiout
, "fork");
4681 if (!ptid_equal (b
->forked_inferior_pid
, null_ptid
))
4683 ui_out_text (uiout
, ", process ");
4684 ui_out_field_int (uiout
, "what",
4685 ptid_get_pid (b
->forked_inferior_pid
));
4686 ui_out_spaces (uiout
, 1);
4690 /* Implement the "print_mention" breakpoint_ops method for fork
4694 print_mention_catch_fork (struct breakpoint
*b
)
4696 printf_filtered (_("Catchpoint %d (fork)"), b
->number
);
4699 /* The breakpoint_ops structure to be used in fork catchpoints. */
4701 static struct breakpoint_ops catch_fork_breakpoint_ops
=
4705 breakpoint_hit_catch_fork
,
4706 print_it_catch_fork
,
4707 print_one_catch_fork
,
4708 print_mention_catch_fork
4711 /* Implement the "insert" breakpoint_ops method for vfork catchpoints. */
4714 insert_catch_vfork (struct breakpoint
*b
)
4716 target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
4719 /* Implement the "remove" breakpoint_ops method for vfork catchpoints. */
4722 remove_catch_vfork (struct breakpoint
*b
)
4724 return target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
4727 /* Implement the "breakpoint_hit" breakpoint_ops method for vfork
4731 breakpoint_hit_catch_vfork (struct breakpoint
*b
)
4733 return inferior_has_vforked (inferior_ptid
, &b
->forked_inferior_pid
);
4736 /* Implement the "print_it" breakpoint_ops method for vfork catchpoints. */
4738 static enum print_stop_action
4739 print_it_catch_vfork (struct breakpoint
*b
)
4741 annotate_catchpoint (b
->number
);
4742 printf_filtered (_("\nCatchpoint %d (vforked process %d), "),
4743 b
->number
, ptid_get_pid (b
->forked_inferior_pid
));
4744 return PRINT_SRC_AND_LOC
;
4747 /* Implement the "print_one" breakpoint_ops method for vfork catchpoints. */
4750 print_one_catch_vfork (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
4752 struct value_print_options opts
;
4754 get_user_print_options (&opts
);
4755 /* Field 4, the address, is omitted (which makes the columns
4756 not line up too nicely with the headers, but the effect
4757 is relatively readable). */
4758 if (opts
.addressprint
)
4759 ui_out_field_skip (uiout
, "addr");
4761 ui_out_text (uiout
, "vfork");
4762 if (!ptid_equal (b
->forked_inferior_pid
, null_ptid
))
4764 ui_out_text (uiout
, ", process ");
4765 ui_out_field_int (uiout
, "what",
4766 ptid_get_pid (b
->forked_inferior_pid
));
4767 ui_out_spaces (uiout
, 1);
4771 /* Implement the "print_mention" breakpoint_ops method for vfork
4775 print_mention_catch_vfork (struct breakpoint
*b
)
4777 printf_filtered (_("Catchpoint %d (vfork)"), b
->number
);
4780 /* The breakpoint_ops structure to be used in vfork catchpoints. */
4782 static struct breakpoint_ops catch_vfork_breakpoint_ops
=
4786 breakpoint_hit_catch_vfork
,
4787 print_it_catch_vfork
,
4788 print_one_catch_vfork
,
4789 print_mention_catch_vfork
4792 /* Create a new breakpoint of the bp_catchpoint kind and return it.
4794 If TEMPFLAG is non-zero, then make the breakpoint temporary.
4795 If COND_STRING is not NULL, then store it in the breakpoint.
4796 OPS, if not NULL, is the breakpoint_ops structure associated
4797 to the catchpoint. */
4799 static struct breakpoint
*
4800 create_catchpoint (int tempflag
, char *cond_string
,
4801 struct breakpoint_ops
*ops
)
4803 struct symtab_and_line sal
;
4804 struct breakpoint
*b
;
4811 b
= set_raw_breakpoint (sal
, bp_catchpoint
);
4812 set_breakpoint_count (breakpoint_count
+ 1);
4813 b
->number
= breakpoint_count
;
4815 b
->cond_string
= (cond_string
== NULL
) ? NULL
: xstrdup (cond_string
);
4817 b
->addr_string
= NULL
;
4818 b
->enable_state
= bp_enabled
;
4819 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4823 update_global_location_list (1);
4829 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4830 struct breakpoint_ops
*ops
)
4832 struct breakpoint
*b
= create_catchpoint (tempflag
, cond_string
, ops
);
4834 /* FIXME: We should put this information in a breakpoint private data
4836 b
->forked_inferior_pid
= null_ptid
;
4839 /* Exec catchpoints. */
4842 insert_catch_exec (struct breakpoint
*b
)
4844 target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
4848 remove_catch_exec (struct breakpoint
*b
)
4850 return target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
4854 breakpoint_hit_catch_exec (struct breakpoint
*b
)
4856 return inferior_has_execd (inferior_ptid
, &b
->exec_pathname
);
4859 static enum print_stop_action
4860 print_it_catch_exec (struct breakpoint
*b
)
4862 annotate_catchpoint (b
->number
);
4863 printf_filtered (_("\nCatchpoint %d (exec'd %s), "), b
->number
,
4865 return PRINT_SRC_AND_LOC
;
4869 print_one_catch_exec (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
4871 struct value_print_options opts
;
4873 get_user_print_options (&opts
);
4875 /* Field 4, the address, is omitted (which makes the columns
4876 not line up too nicely with the headers, but the effect
4877 is relatively readable). */
4878 if (opts
.addressprint
)
4879 ui_out_field_skip (uiout
, "addr");
4881 ui_out_text (uiout
, "exec");
4882 if (b
->exec_pathname
!= NULL
)
4884 ui_out_text (uiout
, ", program \"");
4885 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
4886 ui_out_text (uiout
, "\" ");
4891 print_mention_catch_exec (struct breakpoint
*b
)
4893 printf_filtered (_("Catchpoint %d (exec)"), b
->number
);
4896 static struct breakpoint_ops catch_exec_breakpoint_ops
=
4900 breakpoint_hit_catch_exec
,
4901 print_it_catch_exec
,
4902 print_one_catch_exec
,
4903 print_mention_catch_exec
4907 hw_breakpoint_used_count (void)
4909 struct breakpoint
*b
;
4914 if (b
->type
== bp_hardware_breakpoint
&& breakpoint_enabled (b
))
4922 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4924 struct breakpoint
*b
;
4927 *other_type_used
= 0;
4930 if (breakpoint_enabled (b
))
4932 if (b
->type
== type
)
4934 else if ((b
->type
== bp_hardware_watchpoint
||
4935 b
->type
== bp_read_watchpoint
||
4936 b
->type
== bp_access_watchpoint
))
4937 *other_type_used
= 1;
4944 disable_watchpoints_before_interactive_call_start (void)
4946 struct breakpoint
*b
;
4950 if (((b
->type
== bp_watchpoint
)
4951 || (b
->type
== bp_hardware_watchpoint
)
4952 || (b
->type
== bp_read_watchpoint
)
4953 || (b
->type
== bp_access_watchpoint
))
4954 && breakpoint_enabled (b
))
4956 b
->enable_state
= bp_call_disabled
;
4957 update_global_location_list (0);
4963 enable_watchpoints_after_interactive_call_stop (void)
4965 struct breakpoint
*b
;
4969 if (((b
->type
== bp_watchpoint
)
4970 || (b
->type
== bp_hardware_watchpoint
)
4971 || (b
->type
== bp_read_watchpoint
)
4972 || (b
->type
== bp_access_watchpoint
))
4973 && (b
->enable_state
== bp_call_disabled
))
4975 b
->enable_state
= bp_enabled
;
4976 update_global_location_list (1);
4982 /* Set a breakpoint that will evaporate an end of command
4983 at address specified by SAL.
4984 Restrict it to frame FRAME if FRAME is nonzero. */
4987 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4990 struct breakpoint
*b
;
4991 b
= set_raw_breakpoint (sal
, type
);
4992 b
->enable_state
= bp_enabled
;
4993 b
->disposition
= disp_donttouch
;
4994 b
->frame_id
= frame_id
;
4996 /* If we're debugging a multi-threaded program, then we
4997 want momentary breakpoints to be active in only a
4998 single thread of control. */
4999 if (in_thread_list (inferior_ptid
))
5000 b
->thread
= pid_to_thread_id (inferior_ptid
);
5002 update_global_location_list_nothrow (1);
5007 /* Make a deep copy of momentary breakpoint ORIG. Returns NULL if
5011 clone_momentary_breakpoint (struct breakpoint
*orig
)
5013 struct breakpoint
*copy
;
5015 /* If there's nothing to clone, then return nothing. */
5019 copy
= set_raw_breakpoint_without_location (orig
->type
);
5020 copy
->loc
= allocate_bp_location (copy
);
5021 set_breakpoint_location_function (copy
->loc
);
5023 copy
->loc
->requested_address
= orig
->loc
->requested_address
;
5024 copy
->loc
->address
= orig
->loc
->address
;
5025 copy
->loc
->section
= orig
->loc
->section
;
5027 if (orig
->source_file
== NULL
)
5028 copy
->source_file
= NULL
;
5030 copy
->source_file
= xstrdup (orig
->source_file
);
5032 copy
->line_number
= orig
->line_number
;
5033 copy
->frame_id
= orig
->frame_id
;
5034 copy
->thread
= orig
->thread
;
5036 copy
->enable_state
= bp_enabled
;
5037 copy
->disposition
= disp_donttouch
;
5038 copy
->number
= internal_breakpoint_number
--;
5040 update_global_location_list_nothrow (0);
5045 set_momentary_breakpoint_at_pc (CORE_ADDR pc
, enum bptype type
)
5047 struct symtab_and_line sal
;
5049 sal
= find_pc_line (pc
, 0);
5051 sal
.section
= find_pc_overlay (pc
);
5052 sal
.explicit_pc
= 1;
5054 return set_momentary_breakpoint (sal
, null_frame_id
, type
);
5058 /* Tell the user we have just set a breakpoint B. */
5061 mention (struct breakpoint
*b
)
5064 struct cleanup
*ui_out_chain
;
5065 struct value_print_options opts
;
5067 get_user_print_options (&opts
);
5069 /* FIXME: This is misplaced; mention() is called by things (like
5070 hitting a watchpoint) other than breakpoint creation. It should
5071 be possible to clean this up and at the same time replace the
5072 random calls to breakpoint_changed with this hook. */
5073 observer_notify_breakpoint_created (b
->number
);
5075 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
5076 b
->ops
->print_mention (b
);
5081 printf_filtered (_("(apparently deleted?) Eventpoint %d: "), b
->number
);
5084 ui_out_text (uiout
, "Watchpoint ");
5085 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
5086 ui_out_field_int (uiout
, "number", b
->number
);
5087 ui_out_text (uiout
, ": ");
5088 ui_out_field_string (uiout
, "exp", b
->exp_string
);
5089 do_cleanups (ui_out_chain
);
5091 case bp_hardware_watchpoint
:
5092 ui_out_text (uiout
, "Hardware watchpoint ");
5093 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
5094 ui_out_field_int (uiout
, "number", b
->number
);
5095 ui_out_text (uiout
, ": ");
5096 ui_out_field_string (uiout
, "exp", b
->exp_string
);
5097 do_cleanups (ui_out_chain
);
5099 case bp_read_watchpoint
:
5100 ui_out_text (uiout
, "Hardware read watchpoint ");
5101 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
5102 ui_out_field_int (uiout
, "number", b
->number
);
5103 ui_out_text (uiout
, ": ");
5104 ui_out_field_string (uiout
, "exp", b
->exp_string
);
5105 do_cleanups (ui_out_chain
);
5107 case bp_access_watchpoint
:
5108 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
5109 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
5110 ui_out_field_int (uiout
, "number", b
->number
);
5111 ui_out_text (uiout
, ": ");
5112 ui_out_field_string (uiout
, "exp", b
->exp_string
);
5113 do_cleanups (ui_out_chain
);
5116 if (ui_out_is_mi_like_p (uiout
))
5121 if (b
->disposition
== disp_del
)
5122 printf_filtered (_("Temporary breakpoint"));
5124 printf_filtered (_("Breakpoint"));
5125 printf_filtered (_(" %d"), b
->number
);
5128 case bp_hardware_breakpoint
:
5129 if (ui_out_is_mi_like_p (uiout
))
5134 printf_filtered (_("Hardware assisted breakpoint %d"), b
->number
);
5138 if (ui_out_is_mi_like_p (uiout
))
5143 printf_filtered (_("Tracepoint"));
5144 printf_filtered (_(" %d"), b
->number
);
5151 case bp_longjmp_resume
:
5152 case bp_step_resume
:
5154 case bp_watchpoint_scope
:
5155 case bp_shlib_event
:
5156 case bp_thread_event
:
5157 case bp_overlay_event
:
5163 /* i18n: cagney/2005-02-11: Below needs to be merged into a
5167 printf_filtered (_(" (%s) pending."), b
->addr_string
);
5171 if (opts
.addressprint
|| b
->source_file
== NULL
)
5173 printf_filtered (" at ");
5174 fputs_filtered (paddress (b
->loc
->address
), gdb_stdout
);
5177 printf_filtered (": file %s, line %d.",
5178 b
->source_file
, b
->line_number
);
5182 struct bp_location
*loc
= b
->loc
;
5184 for (; loc
; loc
= loc
->next
)
5186 printf_filtered (" (%d locations)", n
);
5191 if (ui_out_is_mi_like_p (uiout
))
5193 printf_filtered ("\n");
5197 static struct bp_location
*
5198 add_location_to_breakpoint (struct breakpoint
*b
,
5199 const struct symtab_and_line
*sal
)
5201 struct bp_location
*loc
, **tmp
;
5203 loc
= allocate_bp_location (b
);
5204 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
5207 loc
->requested_address
= sal
->pc
;
5208 loc
->address
= adjust_breakpoint_address (loc
->requested_address
, b
->type
);
5209 loc
->section
= sal
->section
;
5211 set_breakpoint_location_function (loc
);
5216 /* Return 1 if LOC is pointing to a permanent breakpoint,
5217 return 0 otherwise. */
5220 bp_loc_is_permanent (struct bp_location
*loc
)
5224 const gdb_byte
*brk
;
5225 gdb_byte
*target_mem
;
5226 struct cleanup
*cleanup
;
5229 gdb_assert (loc
!= NULL
);
5231 addr
= loc
->address
;
5232 brk
= gdbarch_breakpoint_from_pc (current_gdbarch
, &addr
, &len
);
5234 /* Software breakpoints unsupported? */
5238 target_mem
= alloca (len
);
5240 /* Enable the automatic memory restoration from breakpoints while
5241 we read the memory. Otherwise we could say about our temporary
5242 breakpoints they are permanent. */
5243 cleanup
= make_show_memory_breakpoints_cleanup (0);
5245 if (target_read_memory (loc
->address
, target_mem
, len
) == 0
5246 && memcmp (target_mem
, brk
, len
) == 0)
5249 do_cleanups (cleanup
);
5256 /* Create a breakpoint with SAL as location. Use ADDR_STRING
5257 as textual description of the location, and COND_STRING
5258 as condition expression. */
5261 create_breakpoint (struct symtabs_and_lines sals
, char *addr_string
,
5263 enum bptype type
, enum bpdisp disposition
,
5264 int thread
, int task
, int ignore_count
,
5265 struct breakpoint_ops
*ops
, int from_tty
, int enabled
)
5267 struct breakpoint
*b
= NULL
;
5270 if (type
== bp_hardware_breakpoint
)
5272 int i
= hw_breakpoint_used_count ();
5273 int target_resources_ok
=
5274 target_can_use_hardware_watchpoint (bp_hardware_breakpoint
,
5276 if (target_resources_ok
== 0)
5277 error (_("No hardware breakpoint support in the target."));
5278 else if (target_resources_ok
< 0)
5279 error (_("Hardware breakpoints used exceeds limit."));
5282 for (i
= 0; i
< sals
.nelts
; ++i
)
5284 struct symtab_and_line sal
= sals
.sals
[i
];
5285 struct bp_location
*loc
;
5288 describe_other_breakpoints (sal
.pc
, sal
.section
, thread
);
5292 b
= set_raw_breakpoint (sal
, type
);
5293 set_breakpoint_count (breakpoint_count
+ 1);
5294 b
->number
= breakpoint_count
;
5298 b
->cond_string
= cond_string
;
5299 b
->ignore_count
= ignore_count
;
5300 b
->enable_state
= enabled
? bp_enabled
: bp_disabled
;
5301 b
->disposition
= disposition
;
5307 loc
= add_location_to_breakpoint (b
, &sal
);
5310 if (bp_loc_is_permanent (loc
))
5311 make_breakpoint_permanent (b
);
5315 char *arg
= b
->cond_string
;
5316 loc
->cond
= parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
5318 error (_("Garbage %s follows condition"), arg
);
5323 b
->addr_string
= addr_string
;
5325 /* addr_string has to be used or breakpoint_re_set will delete
5327 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
5333 /* Remove element at INDEX_TO_REMOVE from SAL, shifting other
5334 elements to fill the void space. */
5336 remove_sal (struct symtabs_and_lines
*sal
, int index_to_remove
)
5338 int i
= index_to_remove
+1;
5339 int last_index
= sal
->nelts
-1;
5341 for (;i
<= last_index
; ++i
)
5342 sal
->sals
[i
-1] = sal
->sals
[i
];
5347 /* If appropriate, obtains all sals that correspond
5348 to the same file and line as SAL. This is done
5349 only if SAL does not have explicit PC and has
5350 line and file information. If we got just a single
5351 expanded sal, return the original.
5353 Otherwise, if SAL.explicit_line is not set, filter out
5354 all sals for which the name of enclosing function
5355 is different from SAL. This makes sure that if we have
5356 breakpoint originally set in template instantiation, say
5357 foo<int>(), we won't expand SAL to locations at the same
5358 line in all existing instantiations of 'foo'.
5361 static struct symtabs_and_lines
5362 expand_line_sal_maybe (struct symtab_and_line sal
)
5364 struct symtabs_and_lines expanded
;
5365 CORE_ADDR original_pc
= sal
.pc
;
5366 char *original_function
= NULL
;
5370 /* If we have explicit pc, don't expand.
5371 If we have no line number, we can't expand. */
5372 if (sal
.explicit_pc
|| sal
.line
== 0 || sal
.symtab
== NULL
)
5375 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5376 expanded
.sals
[0] = sal
;
5381 find_pc_partial_function (original_pc
, &original_function
, NULL
, NULL
);
5383 expanded
= expand_line_sal (sal
);
5384 if (expanded
.nelts
== 1)
5386 /* We had one sal, we got one sal. Without futher
5387 processing, just return the original sal. */
5388 xfree (expanded
.sals
);
5390 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5391 sal
.pc
= original_pc
;
5392 expanded
.sals
[0] = sal
;
5396 if (!sal
.explicit_line
)
5398 CORE_ADDR func_addr
, func_end
;
5399 for (i
= 0; i
< expanded
.nelts
; ++i
)
5401 CORE_ADDR pc
= expanded
.sals
[i
].pc
;
5402 char *this_function
;
5403 if (find_pc_partial_function (pc
, &this_function
,
5404 &func_addr
, &func_end
))
5406 if (this_function
&&
5407 strcmp (this_function
, original_function
) != 0)
5409 remove_sal (&expanded
, i
);
5412 else if (func_addr
== pc
)
5414 /* We're at beginning of a function, and should
5416 struct symbol
*sym
= find_pc_function (pc
);
5418 expanded
.sals
[i
] = find_function_start_sal (sym
, 1);
5421 = gdbarch_skip_prologue (current_gdbarch
, pc
);
5428 if (expanded
.nelts
<= 1)
5430 /* This is un ugly workaround. If we get zero
5431 expanded sals then something is really wrong.
5432 Fix that by returnign the original sal. */
5433 xfree (expanded
.sals
);
5435 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5436 sal
.pc
= original_pc
;
5437 expanded
.sals
[0] = sal
;
5444 for (i
= 0; i
< expanded
.nelts
; ++i
)
5445 if (expanded
.sals
[i
].pc
== original_pc
)
5456 /* Add SALS.nelts breakpoints to the breakpoint table. For each
5457 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i]
5458 value. COND_STRING, if not NULL, specified the condition to be
5459 used for all breakpoints. Essentially the only case where
5460 SALS.nelts is not 1 is when we set a breakpoint on an overloaded
5461 function. In that case, it's still not possible to specify
5462 separate conditions for different overloaded functions, so
5463 we take just a single condition string.
5465 NOTE: If the function succeeds, the caller is expected to cleanup
5466 the arrays ADDR_STRING, COND_STRING, and SALS (but not the
5467 array contents). If the function fails (error() is called), the
5468 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
5469 COND and SALS arrays and each of those arrays contents. */
5472 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
5474 enum bptype type
, enum bpdisp disposition
,
5475 int thread
, int task
, int ignore_count
,
5476 struct breakpoint_ops
*ops
, int from_tty
,
5480 for (i
= 0; i
< sals
.nelts
; ++i
)
5482 struct symtabs_and_lines expanded
=
5483 expand_line_sal_maybe (sals
.sals
[i
]);
5485 create_breakpoint (expanded
, addr_string
[i
],
5486 cond_string
, type
, disposition
,
5487 thread
, task
, ignore_count
, ops
, from_tty
, enabled
);
5491 /* Parse ARG which is assumed to be a SAL specification possibly
5492 followed by conditionals. On return, SALS contains an array of SAL
5493 addresses found. ADDR_STRING contains a vector of (canonical)
5494 address strings. ARG points to the end of the SAL. */
5497 parse_breakpoint_sals (char **address
,
5498 struct symtabs_and_lines
*sals
,
5499 char ***addr_string
,
5502 char *addr_start
= *address
;
5503 *addr_string
= NULL
;
5504 /* If no arg given, or if first arg is 'if ', use the default
5506 if ((*address
) == NULL
5507 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
5509 if (default_breakpoint_valid
)
5511 struct symtab_and_line sal
;
5512 init_sal (&sal
); /* initialize to zeroes */
5513 sals
->sals
= (struct symtab_and_line
*)
5514 xmalloc (sizeof (struct symtab_and_line
));
5515 sal
.pc
= default_breakpoint_address
;
5516 sal
.line
= default_breakpoint_line
;
5517 sal
.symtab
= default_breakpoint_symtab
;
5518 sal
.section
= find_pc_overlay (sal
.pc
);
5520 /* "break" without arguments is equivalent to "break *PC" where PC is
5521 the default_breakpoint_address. So make sure to set
5522 sal.explicit_pc to prevent GDB from trying to expand the list of
5523 sals to include all other instances with the same symtab and line.
5525 sal
.explicit_pc
= 1;
5527 sals
->sals
[0] = sal
;
5531 error (_("No default breakpoint address now."));
5535 /* Force almost all breakpoints to be in terms of the
5536 current_source_symtab (which is decode_line_1's default). This
5537 should produce the results we want almost all of the time while
5538 leaving default_breakpoint_* alone.
5539 ObjC: However, don't match an Objective-C method name which
5540 may have a '+' or '-' succeeded by a '[' */
5542 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
5544 if (default_breakpoint_valid
5546 || ((strchr ("+-", (*address
)[0]) != NULL
)
5547 && ((*address
)[1] != '['))))
5548 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
5549 default_breakpoint_line
, addr_string
,
5552 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0,
5553 addr_string
, not_found_ptr
);
5555 /* For any SAL that didn't have a canonical string, fill one in. */
5556 if (sals
->nelts
> 0 && *addr_string
== NULL
)
5557 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
5558 if (addr_start
!= (*address
))
5561 for (i
= 0; i
< sals
->nelts
; i
++)
5563 /* Add the string if not present. */
5564 if ((*addr_string
)[i
] == NULL
)
5565 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
5571 /* Convert each SAL into a real PC. Verify that the PC can be
5572 inserted as a breakpoint. If it can't throw an error. */
5575 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
5579 for (i
= 0; i
< sals
->nelts
; i
++)
5580 resolve_sal_pc (&sals
->sals
[i
]);
5584 do_captured_parse_breakpoint (struct ui_out
*ui
, void *data
)
5586 struct captured_parse_breakpoint_args
*args
= data
;
5588 parse_breakpoint_sals (args
->arg_p
, args
->sals_p
, args
->addr_string_p
,
5589 args
->not_found_ptr
);
5592 /* Given TOK, a string specification of condition and thread, as
5593 accepted by the 'break' command, extract the condition
5594 string and thread number and set *COND_STRING and *THREAD.
5595 PC identifies the context at which the condition should be parsed.
5596 If no condition is found, *COND_STRING is set to NULL.
5597 If no thread is found, *THREAD is set to -1. */
5599 find_condition_and_thread (char *tok
, CORE_ADDR pc
,
5600 char **cond_string
, int *thread
, int *task
)
5602 *cond_string
= NULL
;
5608 char *cond_start
= NULL
;
5609 char *cond_end
= NULL
;
5610 while (*tok
== ' ' || *tok
== '\t')
5615 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5618 toklen
= end_tok
- tok
;
5620 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5622 struct expression
*expr
;
5624 tok
= cond_start
= end_tok
+ 1;
5625 expr
= parse_exp_1 (&tok
, block_for_pc (pc
), 0);
5628 *cond_string
= savestring (cond_start
,
5629 cond_end
- cond_start
);
5631 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5637 *thread
= strtol (tok
, &tok
, 0);
5639 error (_("Junk after thread keyword."));
5640 if (!valid_thread_id (*thread
))
5641 error (_("Unknown thread %d."), *thread
);
5643 else if (toklen
>= 1 && strncmp (tok
, "task", toklen
) == 0)
5649 *task
= strtol (tok
, &tok
, 0);
5651 error (_("Junk after task keyword."));
5652 if (!valid_task_id (*task
))
5653 error (_("Unknown task %d\n"), *task
);
5656 error (_("Junk at end of arguments."));
5660 /* Set a breakpoint. This function is shared between
5661 CLI and MI functions for setting a breakpoint.
5662 This function has two major modes of operations,
5663 selected by the PARSE_CONDITION_AND_THREAD parameter.
5664 If non-zero, the function will parse arg, extracting
5665 breakpoint location, address and thread. Otherwise,
5666 ARG is just the location of breakpoint, with condition
5667 and thread specified by the COND_STRING and THREAD
5671 break_command_really (char *arg
, char *cond_string
, int thread
,
5672 int parse_condition_and_thread
,
5673 int tempflag
, int hardwareflag
, int traceflag
,
5675 enum auto_boolean pending_break_support
,
5676 struct breakpoint_ops
*ops
,
5680 struct gdb_exception e
;
5681 struct symtabs_and_lines sals
;
5682 struct symtab_and_line pending_sal
;
5685 char *addr_start
= arg
;
5687 struct cleanup
*old_chain
;
5688 struct cleanup
*breakpoint_chain
= NULL
;
5689 struct captured_parse_breakpoint_args parse_args
;
5693 enum bptype type_wanted
;
5700 parse_args
.arg_p
= &arg
;
5701 parse_args
.sals_p
= &sals
;
5702 parse_args
.addr_string_p
= &addr_string
;
5703 parse_args
.not_found_ptr
= ¬_found
;
5705 e
= catch_exception (uiout
, do_captured_parse_breakpoint
,
5706 &parse_args
, RETURN_MASK_ALL
);
5708 /* If caller is interested in rc value from parse, set value. */
5712 throw_exception (e
);
5716 case NOT_FOUND_ERROR
:
5718 /* If pending breakpoint support is turned off, throw
5721 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
5722 throw_exception (e
);
5724 exception_print (gdb_stderr
, e
);
5726 /* If pending breakpoint support is auto query and the user
5727 selects no, then simply return the error code. */
5728 if (pending_break_support
== AUTO_BOOLEAN_AUTO
&&
5729 !nquery ("Make breakpoint pending on future shared library load? "))
5732 /* At this point, either the user was queried about setting
5733 a pending breakpoint and selected yes, or pending
5734 breakpoint behavior is on and thus a pending breakpoint
5735 is defaulted on behalf of the user. */
5736 copy_arg
= xstrdup (addr_start
);
5737 addr_string
= ©_arg
;
5739 sals
.sals
= &pending_sal
;
5744 throw_exception (e
);
5751 /* Create a chain of things that always need to be cleaned up. */
5752 old_chain
= make_cleanup (null_cleanup
, 0);
5756 /* Make sure that all storage allocated to SALS gets freed. */
5757 make_cleanup (xfree
, sals
.sals
);
5759 /* Cleanup the addr_string array but not its contents. */
5760 make_cleanup (xfree
, addr_string
);
5763 /* ----------------------------- SNIP -----------------------------
5764 Anything added to the cleanup chain beyond this point is assumed
5765 to be part of a breakpoint. If the breakpoint create succeeds
5766 then the memory is not reclaimed. */
5767 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5769 /* Mark the contents of the addr_string for cleanup. These go on
5770 the breakpoint_chain and only occure if the breakpoint create
5772 for (i
= 0; i
< sals
.nelts
; i
++)
5774 if (addr_string
[i
] != NULL
)
5775 make_cleanup (xfree
, addr_string
[i
]);
5778 /* Resolve all line numbers to PC's and verify that the addresses
5779 are ok for the target. */
5781 breakpoint_sals_to_pc (&sals
, addr_start
);
5783 type_wanted
= (traceflag
5785 : (hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
));
5787 /* Verify that condition can be parsed, before setting any
5788 breakpoints. Allocate a separate condition expression for each
5792 if (parse_condition_and_thread
)
5794 /* Here we only parse 'arg' to separate condition
5795 from thread number, so parsing in context of first
5796 sal is OK. When setting the breakpoint we'll
5797 re-parse it in context of each sal. */
5800 find_condition_and_thread (arg
, sals
.sals
[0].pc
, &cond_string
,
5803 make_cleanup (xfree
, cond_string
);
5807 /* Create a private copy of condition string. */
5810 cond_string
= xstrdup (cond_string
);
5811 make_cleanup (xfree
, cond_string
);
5814 create_breakpoints (sals
, addr_string
, cond_string
, type_wanted
,
5815 tempflag
? disp_del
: disp_donttouch
,
5816 thread
, task
, ignore_count
, ops
, from_tty
, enabled
);
5820 struct symtab_and_line sal
= {0};
5821 struct breakpoint
*b
;
5823 make_cleanup (xfree
, copy_arg
);
5825 b
= set_raw_breakpoint_without_location (type_wanted
);
5826 set_breakpoint_count (breakpoint_count
+ 1);
5827 b
->number
= breakpoint_count
;
5829 b
->addr_string
= addr_string
[0];
5830 b
->cond_string
= NULL
;
5831 b
->ignore_count
= ignore_count
;
5832 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5833 b
->condition_not_parsed
= 1;
5835 b
->enable_state
= enabled
? bp_enabled
: bp_disabled
;
5841 warning (_("Multiple breakpoints were set.\n"
5842 "Use the \"delete\" command to delete unwanted breakpoints."));
5843 /* That's it. Discard the cleanups for data inserted into the
5845 discard_cleanups (breakpoint_chain
);
5846 /* But cleanup everything else. */
5847 do_cleanups (old_chain
);
5849 /* error call may happen here - have BREAKPOINT_CHAIN already discarded. */
5850 update_global_location_list (1);
5853 /* Set a breakpoint.
5854 ARG is a string describing breakpoint address,
5855 condition, and thread.
5856 FLAG specifies if a breakpoint is hardware on,
5857 and if breakpoint is temporary, using BP_HARDWARE_FLAG
5861 break_command_1 (char *arg
, int flag
, int from_tty
)
5863 int hardwareflag
= flag
& BP_HARDWAREFLAG
;
5864 int tempflag
= flag
& BP_TEMPFLAG
;
5866 break_command_really (arg
,
5867 NULL
, 0, 1 /* parse arg */,
5868 tempflag
, hardwareflag
, 0 /* traceflag */,
5869 0 /* Ignore count */,
5870 pending_break_support
,
5871 NULL
/* breakpoint_ops */,
5878 set_breakpoint (char *address
, char *condition
,
5879 int hardwareflag
, int tempflag
,
5880 int thread
, int ignore_count
,
5881 int pending
, int enabled
)
5883 break_command_really (address
, condition
, thread
,
5884 0 /* condition and thread are valid. */,
5885 tempflag
, hardwareflag
, 0 /* traceflag */,
5888 ? AUTO_BOOLEAN_TRUE
: AUTO_BOOLEAN_FALSE
,
5892 /* Adjust SAL to the first instruction past the function prologue.
5893 The end of the prologue is determined using the line table from
5894 the debugging information.
5896 If SAL is already past the prologue, then do nothing. */
5899 skip_prologue_sal (struct symtab_and_line
*sal
)
5901 struct symbol
*sym
= find_pc_function (sal
->pc
);
5902 struct symtab_and_line start_sal
;
5907 start_sal
= find_function_start_sal (sym
, 1);
5908 if (sal
->pc
< start_sal
.pc
)
5912 /* Helper function for break_command_1 and disassemble_command. */
5915 resolve_sal_pc (struct symtab_and_line
*sal
)
5919 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5921 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5922 error (_("No line %d in file \"%s\"."),
5923 sal
->line
, sal
->symtab
->filename
);
5926 /* If this SAL corresponds to a breakpoint inserted using
5927 a line number, then skip the function prologue if necessary. */
5928 if (sal
->explicit_line
)
5930 /* Preserve the original line number. */
5931 int saved_line
= sal
->line
;
5932 skip_prologue_sal (sal
);
5933 sal
->line
= saved_line
;
5937 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5939 struct blockvector
*bv
;
5943 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &b
, sal
->symtab
);
5946 sym
= block_linkage_function (b
);
5949 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5950 sal
->section
= SYMBOL_OBJ_SECTION (sym
);
5954 /* It really is worthwhile to have the section, so we'll just
5955 have to look harder. This case can be executed if we have
5956 line numbers but no functions (as can happen in assembly
5959 struct minimal_symbol
*msym
;
5961 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5963 sal
->section
= SYMBOL_OBJ_SECTION (msym
);
5970 break_command (char *arg
, int from_tty
)
5972 break_command_1 (arg
, 0, from_tty
);
5976 tbreak_command (char *arg
, int from_tty
)
5978 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5982 hbreak_command (char *arg
, int from_tty
)
5984 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5988 thbreak_command (char *arg
, int from_tty
)
5990 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5994 stop_command (char *arg
, int from_tty
)
5996 printf_filtered (_("Specify the type of breakpoint to set.\n\
5997 Usage: stop in <function | address>\n\
5998 stop at <line>\n"));
6002 stopin_command (char *arg
, int from_tty
)
6006 if (arg
== (char *) NULL
)
6008 else if (*arg
!= '*')
6013 /* look for a ':'. If this is a line number specification, then
6014 say it is bad, otherwise, it should be an address or
6015 function/method name */
6016 while (*argptr
&& !hasColon
)
6018 hasColon
= (*argptr
== ':');
6023 badInput
= (*argptr
!= ':'); /* Not a class::method */
6025 badInput
= isdigit (*arg
); /* a simple line number */
6029 printf_filtered (_("Usage: stop in <function | address>\n"));
6031 break_command_1 (arg
, 0, from_tty
);
6035 stopat_command (char *arg
, int from_tty
)
6039 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
6046 /* look for a ':'. If there is a '::' then get out, otherwise
6047 it is probably a line number. */
6048 while (*argptr
&& !hasColon
)
6050 hasColon
= (*argptr
== ':');
6055 badInput
= (*argptr
== ':'); /* we have class::method */
6057 badInput
= !isdigit (*arg
); /* not a line number */
6061 printf_filtered (_("Usage: stop at <line>\n"));
6063 break_command_1 (arg
, 0, from_tty
);
6066 /* accessflag: hw_write: watch write,
6067 hw_read: watch read,
6068 hw_access: watch access (read or write) */
6070 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
6072 struct breakpoint
*b
, *scope_breakpoint
= NULL
;
6073 struct symtab_and_line sal
;
6074 struct expression
*exp
;
6075 struct block
*exp_valid_block
;
6076 struct value
*val
, *mark
;
6077 struct frame_info
*frame
;
6078 struct frame_info
*prev_frame
= NULL
;
6079 char *exp_start
= NULL
;
6080 char *exp_end
= NULL
;
6081 char *tok
, *id_tok_start
, *end_tok
;
6083 char *cond_start
= NULL
;
6084 char *cond_end
= NULL
;
6085 struct expression
*cond
= NULL
;
6086 int i
, other_type_used
, target_resources_ok
= 0;
6087 enum bptype bp_type
;
6091 init_sal (&sal
); /* initialize to zeroes */
6093 /* Make sure that we actually have parameters to parse. */
6094 if (arg
!= NULL
&& arg
[0] != '\0')
6096 toklen
= strlen (arg
); /* Size of argument list. */
6098 /* Points tok to the end of the argument list. */
6099 tok
= arg
+ toklen
- 1;
6101 /* Go backwards in the parameters list. Skip the last parameter.
6102 If we're expecting a 'thread <thread_num>' parameter, this should
6103 be the thread identifier. */
6104 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
6106 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
6109 /* Points end_tok to the beginning of the last token. */
6110 id_tok_start
= tok
+ 1;
6112 /* Go backwards in the parameters list. Skip one more parameter.
6113 If we're expecting a 'thread <thread_num>' parameter, we should
6114 reach a "thread" token. */
6115 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
6120 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
6123 /* Move the pointer forward to skip the whitespace and
6124 calculate the length of the token. */
6126 toklen
= end_tok
- tok
;
6128 if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
6130 /* At this point we've found a "thread" token, which means
6131 the user is trying to set a watchpoint that triggers
6132 only in a specific thread. */
6135 /* Extract the thread ID from the next token. */
6136 thread
= strtol (id_tok_start
, &endp
, 0);
6138 /* Check if the user provided a valid numeric value for the
6140 if (*endp
!= ' ' && *endp
!= '\t' && *endp
!= '\0')
6141 error (_("Invalid thread ID specification %s."), id_tok_start
);
6143 /* Check if the thread actually exists. */
6144 if (!valid_thread_id (thread
))
6145 error (_("Unknown thread %d."), thread
);
6147 /* Truncate the string and get rid of the thread <thread_num>
6148 parameter before the parameter list is parsed by the
6149 evaluate_expression() function. */
6154 /* Parse the rest of the arguments. */
6155 innermost_block
= NULL
;
6157 exp
= parse_exp_1 (&arg
, 0, 0);
6159 /* Remove trailing whitespace from the expression before saving it.
6160 This makes the eventual display of the expression string a bit
6162 while (exp_end
> exp_start
&& (exp_end
[-1] == ' ' || exp_end
[-1] == '\t'))
6165 exp_valid_block
= innermost_block
;
6166 mark
= value_mark ();
6167 fetch_watchpoint_value (exp
, &val
, NULL
, NULL
);
6169 release_value (val
);
6172 while (*tok
== ' ' || *tok
== '\t')
6176 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
6179 toklen
= end_tok
- tok
;
6180 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
6182 tok
= cond_start
= end_tok
+ 1;
6183 cond
= parse_exp_1 (&tok
, 0, 0);
6187 error (_("Junk at end of command."));
6189 if (accessflag
== hw_read
)
6190 bp_type
= bp_read_watchpoint
;
6191 else if (accessflag
== hw_access
)
6192 bp_type
= bp_access_watchpoint
;
6194 bp_type
= bp_hardware_watchpoint
;
6196 mem_cnt
= can_use_hardware_watchpoint (val
);
6197 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
6198 error (_("Expression cannot be implemented with read/access watchpoint."));
6201 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
6202 target_resources_ok
=
6203 target_can_use_hardware_watchpoint (bp_type
, i
+ mem_cnt
,
6205 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
6206 error (_("Target does not support this type of hardware watchpoint."));
6208 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
6209 error (_("Target can only support one kind of HW watchpoint at a time."));
6212 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
6213 watchpoint could not be set. */
6214 if (!mem_cnt
|| target_resources_ok
<= 0)
6215 bp_type
= bp_watchpoint
;
6217 frame
= block_innermost_frame (exp_valid_block
);
6219 prev_frame
= get_prev_frame (frame
);
6223 /* If the expression is "local", then set up a "watchpoint scope"
6224 breakpoint at the point where we've left the scope of the watchpoint
6225 expression. Create the scope breakpoint before the watchpoint, so
6226 that we will encounter it first in bpstat_stop_status. */
6227 if (innermost_block
&& prev_frame
)
6229 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
6230 bp_watchpoint_scope
);
6232 scope_breakpoint
->enable_state
= bp_enabled
;
6234 /* Automatically delete the breakpoint when it hits. */
6235 scope_breakpoint
->disposition
= disp_del
;
6237 /* Only break in the proper frame (help with recursion). */
6238 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
6240 /* Set the address at which we will stop. */
6241 scope_breakpoint
->loc
->requested_address
6242 = get_frame_pc (prev_frame
);
6243 scope_breakpoint
->loc
->address
6244 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
,
6245 scope_breakpoint
->type
);
6248 /* Now set up the breakpoint. */
6249 b
= set_raw_breakpoint (sal
, bp_type
);
6250 set_breakpoint_count (breakpoint_count
+ 1);
6251 b
->number
= breakpoint_count
;
6253 b
->disposition
= disp_donttouch
;
6255 b
->exp_valid_block
= exp_valid_block
;
6256 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
6259 b
->loc
->cond
= cond
;
6261 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
6266 b
->watchpoint_frame
= get_frame_id (frame
);
6268 b
->watchpoint_frame
= null_frame_id
;
6270 if (scope_breakpoint
!= NULL
)
6272 /* The scope breakpoint is related to the watchpoint. We will
6273 need to act on them together. */
6274 b
->related_breakpoint
= scope_breakpoint
;
6275 scope_breakpoint
->related_breakpoint
= b
;
6278 value_free_to_mark (mark
);
6280 update_global_location_list (1);
6283 /* Return count of locations need to be watched and can be handled
6284 in hardware. If the watchpoint can not be handled
6285 in hardware return zero. */
6288 can_use_hardware_watchpoint (struct value
*v
)
6290 int found_memory_cnt
= 0;
6291 struct value
*head
= v
;
6293 /* Did the user specifically forbid us to use hardware watchpoints? */
6294 if (!can_use_hw_watchpoints
)
6297 /* Make sure that the value of the expression depends only upon
6298 memory contents, and values computed from them within GDB. If we
6299 find any register references or function calls, we can't use a
6300 hardware watchpoint.
6302 The idea here is that evaluating an expression generates a series
6303 of values, one holding the value of every subexpression. (The
6304 expression a*b+c has five subexpressions: a, b, a*b, c, and
6305 a*b+c.) GDB's values hold almost enough information to establish
6306 the criteria given above --- they identify memory lvalues,
6307 register lvalues, computed values, etcetera. So we can evaluate
6308 the expression, and then scan the chain of values that leaves
6309 behind to decide whether we can detect any possible change to the
6310 expression's final value using only hardware watchpoints.
6312 However, I don't think that the values returned by inferior
6313 function calls are special in any way. So this function may not
6314 notice that an expression involving an inferior function call
6315 can't be watched with hardware watchpoints. FIXME. */
6316 for (; v
; v
= value_next (v
))
6318 if (VALUE_LVAL (v
) == lval_memory
)
6321 /* A lazy memory lvalue is one that GDB never needed to fetch;
6322 we either just used its address (e.g., `a' in `a.b') or
6323 we never needed it at all (e.g., `a' in `a,b'). */
6327 /* Ahh, memory we actually used! Check if we can cover
6328 it with hardware watchpoints. */
6329 struct type
*vtype
= check_typedef (value_type (v
));
6331 /* We only watch structs and arrays if user asked for it
6332 explicitly, never if they just happen to appear in a
6333 middle of some value chain. */
6335 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
6336 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
6338 CORE_ADDR vaddr
= value_address (v
);
6339 int len
= TYPE_LENGTH (value_type (v
));
6341 if (!target_region_ok_for_hw_watchpoint (vaddr
, len
))
6348 else if (VALUE_LVAL (v
) != not_lval
6349 && deprecated_value_modifiable (v
) == 0)
6350 return 0; /* ??? What does this represent? */
6351 else if (VALUE_LVAL (v
) == lval_register
)
6352 return 0; /* cannot watch a register with a HW watchpoint */
6355 /* The expression itself looks suitable for using a hardware
6356 watchpoint, but give the target machine a chance to reject it. */
6357 return found_memory_cnt
;
6361 watch_command_wrapper (char *arg
, int from_tty
)
6363 watch_command (arg
, from_tty
);
6367 watch_command (char *arg
, int from_tty
)
6369 watch_command_1 (arg
, hw_write
, from_tty
);
6373 rwatch_command_wrapper (char *arg
, int from_tty
)
6375 rwatch_command (arg
, from_tty
);
6379 rwatch_command (char *arg
, int from_tty
)
6381 watch_command_1 (arg
, hw_read
, from_tty
);
6385 awatch_command_wrapper (char *arg
, int from_tty
)
6387 awatch_command (arg
, from_tty
);
6391 awatch_command (char *arg
, int from_tty
)
6393 watch_command_1 (arg
, hw_access
, from_tty
);
6397 /* Helper routines for the until_command routine in infcmd.c. Here
6398 because it uses the mechanisms of breakpoints. */
6400 struct until_break_command_continuation_args
6402 struct breakpoint
*breakpoint
;
6403 struct breakpoint
*breakpoint2
;
6406 /* This function is called by fetch_inferior_event via the
6407 cmd_continuation pointer, to complete the until command. It takes
6408 care of cleaning up the temporary breakpoints set up by the until
6411 until_break_command_continuation (void *arg
)
6413 struct until_break_command_continuation_args
*a
= arg
;
6415 delete_breakpoint (a
->breakpoint
);
6417 delete_breakpoint (a
->breakpoint2
);
6421 until_break_command (char *arg
, int from_tty
, int anywhere
)
6423 struct symtabs_and_lines sals
;
6424 struct symtab_and_line sal
;
6425 struct frame_info
*frame
= get_selected_frame (NULL
);
6426 struct frame_info
*prev_frame
= get_prev_frame (frame
);
6427 struct breakpoint
*breakpoint
;
6428 struct breakpoint
*breakpoint2
= NULL
;
6429 struct cleanup
*old_chain
;
6431 clear_proceed_status ();
6433 /* Set a breakpoint where the user wants it and at return from
6436 if (default_breakpoint_valid
)
6437 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
6438 default_breakpoint_line
, (char ***) NULL
, NULL
);
6440 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
6441 0, (char ***) NULL
, NULL
);
6443 if (sals
.nelts
!= 1)
6444 error (_("Couldn't get information on specified line."));
6447 xfree (sals
.sals
); /* malloc'd, so freed */
6450 error (_("Junk at end of arguments."));
6452 resolve_sal_pc (&sal
);
6455 /* If the user told us to continue until a specified location,
6456 we don't specify a frame at which we need to stop. */
6457 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
6459 /* Otherwise, specify the current frame, because we want to stop only
6460 at the very same frame. */
6461 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (frame
),
6464 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
6466 /* Keep within the current frame, or in frames called by the current
6470 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
6471 sal
.pc
= get_frame_pc (prev_frame
);
6472 breakpoint2
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
6474 make_cleanup_delete_breakpoint (breakpoint2
);
6477 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
6479 /* If we are running asynchronously, and proceed call above has actually
6480 managed to start the target, arrange for breakpoints to be
6481 deleted when the target stops. Otherwise, we're already stopped and
6482 delete breakpoints via cleanup chain. */
6484 if (target_can_async_p () && is_running (inferior_ptid
))
6486 struct until_break_command_continuation_args
*args
;
6487 args
= xmalloc (sizeof (*args
));
6489 args
->breakpoint
= breakpoint
;
6490 args
->breakpoint2
= breakpoint2
;
6492 discard_cleanups (old_chain
);
6493 add_continuation (inferior_thread (),
6494 until_break_command_continuation
, args
,
6498 do_cleanups (old_chain
);
6502 ep_skip_leading_whitespace (char **s
)
6504 if ((s
== NULL
) || (*s
== NULL
))
6506 while (isspace (**s
))
6510 /* This function attempts to parse an optional "if <cond>" clause
6511 from the arg string. If one is not found, it returns NULL.
6513 Else, it returns a pointer to the condition string. (It does not
6514 attempt to evaluate the string against a particular block.) And,
6515 it updates arg to point to the first character following the parsed
6516 if clause in the arg string. */
6519 ep_parse_optional_if_clause (char **arg
)
6523 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
6526 /* Skip the "if" keyword. */
6529 /* Skip any extra leading whitespace, and record the start of the
6530 condition string. */
6531 ep_skip_leading_whitespace (arg
);
6534 /* Assume that the condition occupies the remainder of the arg string. */
6535 (*arg
) += strlen (cond_string
);
6540 /* This function attempts to parse an optional filename from the arg
6541 string. If one is not found, it returns NULL.
6543 Else, it returns a pointer to the parsed filename. (This function
6544 makes no attempt to verify that a file of that name exists, or is
6545 accessible.) And, it updates arg to point to the first character
6546 following the parsed filename in the arg string.
6548 Note that clients needing to preserve the returned filename for
6549 future access should copy it to their own buffers. */
6551 ep_parse_optional_filename (char **arg
)
6553 static char filename
[1024];
6558 if ((*arg_p
== '\0') || isspace (*arg_p
))
6576 /* Commands to deal with catching events, such as signals, exceptions,
6577 process start/exit, etc. */
6581 catch_fork_temporary
, catch_vfork_temporary
,
6582 catch_fork_permanent
, catch_vfork_permanent
6587 catch_fork_command_1 (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6589 char *cond_string
= NULL
;
6590 catch_fork_kind fork_kind
;
6593 fork_kind
= (catch_fork_kind
) (uintptr_t) get_cmd_context (command
);
6594 tempflag
= (fork_kind
== catch_fork_temporary
6595 || fork_kind
== catch_vfork_temporary
);
6599 ep_skip_leading_whitespace (&arg
);
6601 /* The allowed syntax is:
6603 catch [v]fork if <cond>
6605 First, check if there's an if clause. */
6606 cond_string
= ep_parse_optional_if_clause (&arg
);
6608 if ((*arg
!= '\0') && !isspace (*arg
))
6609 error (_("Junk at end of arguments."));
6611 /* If this target supports it, create a fork or vfork catchpoint
6612 and enable reporting of such events. */
6615 case catch_fork_temporary
:
6616 case catch_fork_permanent
:
6617 create_fork_vfork_event_catchpoint (tempflag
, cond_string
,
6618 &catch_fork_breakpoint_ops
);
6620 case catch_vfork_temporary
:
6621 case catch_vfork_permanent
:
6622 create_fork_vfork_event_catchpoint (tempflag
, cond_string
,
6623 &catch_vfork_breakpoint_ops
);
6626 error (_("unsupported or unknown fork kind; cannot catch it"));
6632 catch_exec_command_1 (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6635 char *cond_string
= NULL
;
6637 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6641 ep_skip_leading_whitespace (&arg
);
6643 /* The allowed syntax is:
6645 catch exec if <cond>
6647 First, check if there's an if clause. */
6648 cond_string
= ep_parse_optional_if_clause (&arg
);
6650 if ((*arg
!= '\0') && !isspace (*arg
))
6651 error (_("Junk at end of arguments."));
6653 /* If this target supports it, create an exec catchpoint
6654 and enable reporting of such events. */
6655 create_catchpoint (tempflag
, cond_string
, &catch_exec_breakpoint_ops
);
6658 static enum print_stop_action
6659 print_exception_catchpoint (struct breakpoint
*b
)
6661 int bp_temp
, bp_throw
;
6663 annotate_catchpoint (b
->number
);
6665 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6666 if (b
->loc
->address
!= b
->loc
->requested_address
)
6667 breakpoint_adjustment_warning (b
->loc
->requested_address
,
6670 bp_temp
= b
->disposition
== disp_del
;
6672 bp_temp
? "Temporary catchpoint "
6674 if (!ui_out_is_mi_like_p (uiout
))
6675 ui_out_field_int (uiout
, "bkptno", b
->number
);
6677 bp_throw
? " (exception thrown), "
6678 : " (exception caught), ");
6679 if (ui_out_is_mi_like_p (uiout
))
6681 ui_out_field_string (uiout
, "reason",
6682 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
6683 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
6684 ui_out_field_int (uiout
, "bkptno", b
->number
);
6686 return PRINT_SRC_AND_LOC
;
6690 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6692 struct value_print_options opts
;
6693 get_user_print_options (&opts
);
6694 if (opts
.addressprint
)
6697 if (b
->loc
== NULL
|| b
->loc
->shlib_disabled
)
6698 ui_out_field_string (uiout
, "addr", "<PENDING>");
6700 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6704 *last_addr
= b
->loc
->address
;
6705 if (strstr (b
->addr_string
, "throw") != NULL
)
6706 ui_out_field_string (uiout
, "what", "exception throw");
6708 ui_out_field_string (uiout
, "what", "exception catch");
6712 print_mention_exception_catchpoint (struct breakpoint
*b
)
6717 bp_temp
= b
->disposition
== disp_del
;
6718 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6719 ui_out_text (uiout
, bp_temp
? _("Temporary catchpoint ")
6720 : _("Catchpoint "));
6721 ui_out_field_int (uiout
, "bkptno", b
->number
);
6722 ui_out_text (uiout
, bp_throw
? _(" (throw)")
6726 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6729 NULL
, /* breakpoint_hit */
6730 print_exception_catchpoint
,
6731 print_one_exception_catchpoint
,
6732 print_mention_exception_catchpoint
6736 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6737 enum exception_event_kind ex_event
, int from_tty
)
6739 char *trigger_func_name
;
6741 if (ex_event
== EX_EVENT_CATCH
)
6742 trigger_func_name
= "__cxa_begin_catch";
6744 trigger_func_name
= "__cxa_throw";
6746 break_command_really (trigger_func_name
, cond_string
, -1,
6747 0 /* condition and thread are valid. */,
6750 AUTO_BOOLEAN_TRUE
/* pending */,
6751 &gnu_v3_exception_catchpoint_ops
, from_tty
,
6757 /* Deal with "catch catch" and "catch throw" commands */
6760 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6761 int tempflag
, int from_tty
)
6763 char *cond_string
= NULL
;
6764 struct symtab_and_line
*sal
= NULL
;
6768 ep_skip_leading_whitespace (&arg
);
6770 cond_string
= ep_parse_optional_if_clause (&arg
);
6772 if ((*arg
!= '\0') && !isspace (*arg
))
6773 error (_("Junk at end of arguments."));
6775 if ((ex_event
!= EX_EVENT_THROW
) &&
6776 (ex_event
!= EX_EVENT_CATCH
))
6777 error (_("Unsupported or unknown exception event; cannot catch it"));
6779 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6782 warning (_("Unsupported with this platform/compiler combination."));
6785 /* Implementation of "catch catch" command. */
6788 catch_catch_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6790 int tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6791 catch_exception_command_1 (EX_EVENT_CATCH
, arg
, tempflag
, from_tty
);
6794 /* Implementation of "catch throw" command. */
6797 catch_throw_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6799 int tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6800 catch_exception_command_1 (EX_EVENT_THROW
, arg
, tempflag
, from_tty
);
6803 /* Create a breakpoint struct for Ada exception catchpoints. */
6806 create_ada_exception_breakpoint (struct symtab_and_line sal
,
6810 struct expression
*cond
,
6811 struct breakpoint_ops
*ops
,
6815 struct breakpoint
*b
;
6819 describe_other_breakpoints (sal
.pc
, sal
.section
, -1);
6820 /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
6821 version for exception catchpoints, because two catchpoints
6822 used for different exception names will use the same address.
6823 In this case, a "breakpoint ... also set at..." warning is
6824 unproductive. Besides. the warning phrasing is also a bit
6825 inapropriate, we should use the word catchpoint, and tell
6826 the user what type of catchpoint it is. The above is good
6827 enough for now, though. */
6830 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6831 set_breakpoint_count (breakpoint_count
+ 1);
6833 b
->enable_state
= bp_enabled
;
6834 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6835 b
->number
= breakpoint_count
;
6836 b
->ignore_count
= 0;
6837 b
->loc
->cond
= cond
;
6838 b
->addr_string
= addr_string
;
6839 b
->language
= language_ada
;
6840 b
->cond_string
= cond_string
;
6841 b
->exp_string
= exp_string
;
6846 update_global_location_list (1);
6849 /* Implement the "catch exception" command. */
6852 catch_ada_exception_command (char *arg
, int from_tty
,
6853 struct cmd_list_element
*command
)
6856 struct symtab_and_line sal
;
6858 char *addr_string
= NULL
;
6859 char *exp_string
= NULL
;
6860 char *cond_string
= NULL
;
6861 struct expression
*cond
= NULL
;
6862 struct breakpoint_ops
*ops
= NULL
;
6864 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6868 sal
= ada_decode_exception_location (arg
, &addr_string
, &exp_string
,
6869 &cond_string
, &cond
, &ops
);
6870 create_ada_exception_breakpoint (sal
, addr_string
, exp_string
,
6871 cond_string
, cond
, ops
, tempflag
,
6875 /* Implement the "catch assert" command. */
6878 catch_assert_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6881 struct symtab_and_line sal
;
6882 char *addr_string
= NULL
;
6883 struct breakpoint_ops
*ops
= NULL
;
6885 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6889 sal
= ada_decode_assert_location (arg
, &addr_string
, &ops
);
6890 create_ada_exception_breakpoint (sal
, addr_string
, NULL
, NULL
, NULL
, ops
,
6891 tempflag
, from_tty
);
6895 catch_command (char *arg
, int from_tty
)
6897 error (_("Catch requires an event name."));
6902 tcatch_command (char *arg
, int from_tty
)
6904 error (_("Catch requires an event name."));
6907 /* Delete breakpoints by address or line. */
6910 clear_command (char *arg
, int from_tty
)
6912 struct breakpoint
*b
;
6913 VEC(breakpoint_p
) *found
= 0;
6916 struct symtabs_and_lines sals
;
6917 struct symtab_and_line sal
;
6922 sals
= decode_line_spec (arg
, 1);
6927 sals
.sals
= (struct symtab_and_line
*)
6928 xmalloc (sizeof (struct symtab_and_line
));
6929 make_cleanup (xfree
, sals
.sals
);
6930 init_sal (&sal
); /* initialize to zeroes */
6931 sal
.line
= default_breakpoint_line
;
6932 sal
.symtab
= default_breakpoint_symtab
;
6933 sal
.pc
= default_breakpoint_address
;
6934 if (sal
.symtab
== 0)
6935 error (_("No source file specified."));
6943 /* We don't call resolve_sal_pc here. That's not
6944 as bad as it seems, because all existing breakpoints
6945 typically have both file/line and pc set. So, if
6946 clear is given file/line, we can match this to existing
6947 breakpoint without obtaining pc at all.
6949 We only support clearing given the address explicitly
6950 present in breakpoint table. Say, we've set breakpoint
6951 at file:line. There were several PC values for that file:line,
6952 due to optimization, all in one block.
6953 We've picked one PC value. If "clear" is issued with another
6954 PC corresponding to the same file:line, the breakpoint won't
6955 be cleared. We probably can still clear the breakpoint, but
6956 since the other PC value is never presented to user, user
6957 can only find it by guessing, and it does not seem important
6960 /* For each line spec given, delete bps which correspond
6961 to it. Do it in two passes, solely to preserve the current
6962 behavior that from_tty is forced true if we delete more than
6966 for (i
= 0; i
< sals
.nelts
; i
++)
6968 /* If exact pc given, clear bpts at that pc.
6969 If line given (pc == 0), clear all bpts on specified line.
6970 If defaulting, clear all bpts on default line
6973 defaulting sal.pc != 0 tests to do
6978 1 0 <can't happen> */
6982 /* Find all matching breakpoints and add them to
6987 /* Are we going to delete b? */
6988 if (b
->type
!= bp_none
6989 && b
->type
!= bp_watchpoint
6990 && b
->type
!= bp_hardware_watchpoint
6991 && b
->type
!= bp_read_watchpoint
6992 && b
->type
!= bp_access_watchpoint
)
6994 struct bp_location
*loc
= b
->loc
;
6995 for (; loc
; loc
= loc
->next
)
6997 int pc_match
= sal
.pc
6998 && (loc
->address
== sal
.pc
)
6999 && (!section_is_overlay (loc
->section
)
7000 || loc
->section
== sal
.section
);
7001 int line_match
= ((default_match
|| (0 == sal
.pc
))
7002 && b
->source_file
!= NULL
7003 && sal
.symtab
!= NULL
7004 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
7005 && b
->line_number
== sal
.line
);
7006 if (pc_match
|| line_match
)
7015 VEC_safe_push(breakpoint_p
, found
, b
);
7018 /* Now go thru the 'found' chain and delete them. */
7019 if (VEC_empty(breakpoint_p
, found
))
7022 error (_("No breakpoint at %s."), arg
);
7024 error (_("No breakpoint at this line."));
7027 if (VEC_length(breakpoint_p
, found
) > 1)
7028 from_tty
= 1; /* Always report if deleted more than one */
7031 if (VEC_length(breakpoint_p
, found
) == 1)
7032 printf_unfiltered (_("Deleted breakpoint "));
7034 printf_unfiltered (_("Deleted breakpoints "));
7036 breakpoints_changed ();
7038 for (ix
= 0; VEC_iterate(breakpoint_p
, found
, ix
, b
); ix
++)
7041 printf_unfiltered ("%d ", b
->number
);
7042 delete_breakpoint (b
);
7045 putchar_unfiltered ('\n');
7048 /* Delete breakpoint in BS if they are `delete' breakpoints and
7049 all breakpoints that are marked for deletion, whether hit or not.
7050 This is called after any breakpoint is hit, or after errors. */
7053 breakpoint_auto_delete (bpstat bs
)
7055 struct breakpoint
*b
, *temp
;
7057 for (; bs
; bs
= bs
->next
)
7058 if (bs
->breakpoint_at
7059 && bs
->breakpoint_at
->owner
7060 && bs
->breakpoint_at
->owner
->disposition
== disp_del
7062 delete_breakpoint (bs
->breakpoint_at
->owner
);
7064 ALL_BREAKPOINTS_SAFE (b
, temp
)
7066 if (b
->disposition
== disp_del_at_next_stop
)
7067 delete_breakpoint (b
);
7071 /* A cleanup function which destroys a vector. */
7074 do_vec_free (void *p
)
7076 VEC(bp_location_p
) **vec
= p
;
7078 VEC_free (bp_location_p
, *vec
);
7081 /* If SHOULD_INSERT is false, do not insert any breakpoint locations
7082 into the inferior, only remove already-inserted locations that no
7083 longer should be inserted. Functions that delete a breakpoint or
7084 breakpoints should pass false, so that deleting a breakpoint
7085 doesn't have the side effect of inserting the locations of other
7086 breakpoints that are marked not-inserted, but should_be_inserted
7087 returns true on them.
7089 This behaviour is useful is situations close to tear-down -- e.g.,
7090 after an exec, while the target still has execution, but breakpoint
7091 shadows of the previous executable image should *NOT* be restored
7092 to the new image; or before detaching, where the target still has
7093 execution and wants to delete breakpoints from GDB's lists, and all
7094 breakpoints had already been removed from the inferior. */
7097 update_global_location_list (int should_insert
)
7099 struct breakpoint
*b
;
7100 struct bp_location
**next
= &bp_location_chain
;
7101 struct bp_location
*loc
;
7102 struct bp_location
*loc2
;
7103 VEC(bp_location_p
) *old_locations
= NULL
;
7106 struct cleanup
*cleanups
;
7108 cleanups
= make_cleanup (do_vec_free
, &old_locations
);
7109 /* Store old locations for future reference. */
7110 for (loc
= bp_location_chain
; loc
; loc
= loc
->global_next
)
7111 VEC_safe_push (bp_location_p
, old_locations
, loc
);
7113 bp_location_chain
= NULL
;
7116 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
7119 next
= &(loc
->global_next
);
7124 /* Identify bp_location instances that are no longer present in the new
7125 list, and therefore should be freed. Note that it's not necessary that
7126 those locations should be removed from inferior -- if there's another
7127 location at the same address (previously marked as duplicate),
7128 we don't need to remove/insert the location. */
7129 for (ix
= 0; VEC_iterate(bp_location_p
, old_locations
, ix
, loc
); ++ix
)
7131 /* Tells if 'loc' is found amoung the new locations. If not, we
7133 int found_object
= 0;
7134 /* Tells if the location should remain inserted in the target. */
7135 int keep_in_target
= 0;
7137 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
7144 /* If this location is no longer present, and inserted, look if there's
7145 maybe a new location at the same address. If so, mark that one
7146 inserted, and don't remove this one. This is needed so that we
7147 don't have a time window where a breakpoint at certain location is not
7152 /* If the location is inserted now, we might have to remove it. */
7154 if (found_object
&& should_be_inserted (loc
))
7156 /* The location is still present in the location list, and still
7157 should be inserted. Don't do anything. */
7162 /* The location is either no longer present, or got disabled.
7163 See if there's another location at the same address, in which
7164 case we don't need to remove this one from the target. */
7165 if (breakpoint_address_is_meaningful (loc
->owner
))
7166 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
7168 /* For the sake of should_insert_location. The
7169 call to check_duplicates will fix up this later. */
7170 loc2
->duplicate
= 0;
7171 if (should_be_inserted (loc2
)
7172 && loc2
!= loc
&& loc2
->address
== loc
->address
)
7175 loc2
->target_info
= loc
->target_info
;
7182 if (!keep_in_target
)
7184 if (remove_breakpoint (loc
, mark_uninserted
))
7186 /* This is just about all we can do. We could keep this
7187 location on the global list, and try to remove it next
7188 time, but there's no particular reason why we will
7191 Note that at this point, loc->owner is still valid,
7192 as delete_breakpoint frees the breakpoint only
7193 after calling us. */
7194 printf_filtered (_("warning: Error removing breakpoint %d\n"),
7195 loc
->owner
->number
);
7203 if (removed
&& non_stop
)
7205 /* This location was removed from the targets. In non-stop mode,
7206 a race condition is possible where we've removed a breakpoint,
7207 but stop events for that breakpoint are already queued and will
7208 arrive later. To suppress spurious SIGTRAPs reported to user,
7209 we keep this breakpoint location for a bit, and will retire it
7210 after we see 3 * thread_count events.
7211 The theory here is that reporting of events should,
7212 "on the average", be fair, so after that many event we'll see
7213 events from all threads that have anything of interest, and no
7214 longer need to keep this breakpoint. This is just a
7215 heuristic, but if it's wrong, we'll report unexpected SIGTRAP,
7216 which is usability issue, but not a correctness problem. */
7217 loc
->events_till_retirement
= 3 * (thread_count () + 1);
7220 VEC_safe_push (bp_location_p
, moribund_locations
, loc
);
7223 free_bp_location (loc
);
7229 check_duplicates (b
);
7232 if (breakpoints_always_inserted_mode () && should_insert
7233 && (have_live_inferiors ()
7234 || (gdbarch_has_global_breakpoints (target_gdbarch
))))
7235 insert_breakpoint_locations ();
7237 do_cleanups (cleanups
);
7241 breakpoint_retire_moribund (void)
7243 struct bp_location
*loc
;
7246 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
7247 if (--(loc
->events_till_retirement
) == 0)
7249 free_bp_location (loc
);
7250 VEC_unordered_remove (bp_location_p
, moribund_locations
, ix
);
7256 update_global_location_list_nothrow (int inserting
)
7258 struct gdb_exception e
;
7259 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7260 update_global_location_list (inserting
);
7263 /* Clear BPT from a BPS. */
7265 bpstat_remove_breakpoint (bpstat bps
, struct breakpoint
*bpt
)
7268 for (bs
= bps
; bs
; bs
= bs
->next
)
7269 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->owner
== bpt
)
7271 bs
->breakpoint_at
= NULL
;
7273 /* bs->commands will be freed later. */
7277 /* Callback for iterate_over_threads. */
7279 bpstat_remove_breakpoint_callback (struct thread_info
*th
, void *data
)
7281 struct breakpoint
*bpt
= data
;
7282 bpstat_remove_breakpoint (th
->stop_bpstat
, bpt
);
7286 /* Delete a breakpoint and clean up all traces of it in the data
7290 delete_breakpoint (struct breakpoint
*bpt
)
7292 struct breakpoint
*b
;
7293 struct bp_location
*loc
, *next
;
7295 gdb_assert (bpt
!= NULL
);
7297 /* Has this bp already been deleted? This can happen because multiple
7298 lists can hold pointers to bp's. bpstat lists are especial culprits.
7300 One example of this happening is a watchpoint's scope bp. When the
7301 scope bp triggers, we notice that the watchpoint is out of scope, and
7302 delete it. We also delete its scope bp. But the scope bp is marked
7303 "auto-deleting", and is already on a bpstat. That bpstat is then
7304 checked for auto-deleting bp's, which are deleted.
7306 A real solution to this problem might involve reference counts in bp's,
7307 and/or giving them pointers back to their referencing bpstat's, and
7308 teaching delete_breakpoint to only free a bp's storage when no more
7309 references were extent. A cheaper bandaid was chosen. */
7310 if (bpt
->type
== bp_none
)
7313 observer_notify_breakpoint_deleted (bpt
->number
);
7315 if (breakpoint_chain
== bpt
)
7316 breakpoint_chain
= bpt
->next
;
7321 b
->next
= bpt
->next
;
7325 free_command_lines (&bpt
->commands
);
7326 if (bpt
->cond_string
!= NULL
)
7327 xfree (bpt
->cond_string
);
7328 if (bpt
->addr_string
!= NULL
)
7329 xfree (bpt
->addr_string
);
7330 if (bpt
->exp
!= NULL
)
7332 if (bpt
->exp_string
!= NULL
)
7333 xfree (bpt
->exp_string
);
7334 if (bpt
->val
!= NULL
)
7335 value_free (bpt
->val
);
7336 if (bpt
->source_file
!= NULL
)
7337 xfree (bpt
->source_file
);
7338 if (bpt
->exec_pathname
!= NULL
)
7339 xfree (bpt
->exec_pathname
);
7341 /* Be sure no bpstat's are pointing at it after it's been freed. */
7342 /* FIXME, how can we find all bpstat's?
7343 We just check stop_bpstat for now. Note that we cannot just
7344 remove bpstats pointing at bpt from the stop_bpstat list
7345 entirely, as breakpoint commands are associated with the bpstat;
7346 if we remove it here, then the later call to
7347 bpstat_do_actions (&stop_bpstat);
7348 in event-top.c won't do anything, and temporary breakpoints
7349 with commands won't work. */
7351 iterate_over_threads (bpstat_remove_breakpoint_callback
, bpt
);
7353 /* Now that breakpoint is removed from breakpoint
7354 list, update the global location list. This
7355 will remove locations that used to belong to
7356 this breakpoint. Do this before freeing
7357 the breakpoint itself, since remove_breakpoint
7358 looks at location's owner. It might be better
7359 design to have location completely self-contained,
7360 but it's not the case now. */
7361 update_global_location_list (0);
7364 /* On the chance that someone will soon try again to delete this same
7365 bp, we mark it as deleted before freeing its storage. */
7366 bpt
->type
= bp_none
;
7372 do_delete_breakpoint_cleanup (void *b
)
7374 delete_breakpoint (b
);
7378 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
7380 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
7384 delete_command (char *arg
, int from_tty
)
7386 struct breakpoint
*b
, *temp
;
7392 int breaks_to_delete
= 0;
7394 /* Delete all breakpoints if no argument.
7395 Do not delete internal or call-dummy breakpoints, these
7396 have to be deleted with an explicit breakpoint number argument. */
7399 if (b
->type
!= bp_call_dummy
&&
7400 b
->type
!= bp_shlib_event
&&
7401 b
->type
!= bp_thread_event
&&
7402 b
->type
!= bp_overlay_event
&&
7405 breaks_to_delete
= 1;
7410 /* Ask user only if there are some breakpoints to delete. */
7412 || (breaks_to_delete
&& query (_("Delete all breakpoints? "))))
7414 ALL_BREAKPOINTS_SAFE (b
, temp
)
7416 if (b
->type
!= bp_call_dummy
&&
7417 b
->type
!= bp_shlib_event
&&
7418 b
->type
!= bp_thread_event
&&
7419 b
->type
!= bp_overlay_event
&&
7421 delete_breakpoint (b
);
7426 map_breakpoint_numbers (arg
, delete_breakpoint
);
7430 all_locations_are_pending (struct bp_location
*loc
)
7432 for (; loc
; loc
= loc
->next
)
7433 if (!loc
->shlib_disabled
)
7438 /* Subroutine of update_breakpoint_locations to simplify it.
7439 Return non-zero if multiple fns in list LOC have the same name.
7440 Null names are ignored. */
7443 ambiguous_names_p (struct bp_location
*loc
)
7445 struct bp_location
*l
;
7446 htab_t htab
= htab_create_alloc (13, htab_hash_string
,
7447 (int (*) (const void *, const void *)) streq
,
7448 NULL
, xcalloc
, xfree
);
7450 for (l
= loc
; l
!= NULL
; l
= l
->next
)
7453 const char *name
= l
->function_name
;
7455 /* Allow for some names to be NULL, ignore them. */
7459 slot
= (const char **) htab_find_slot (htab
, (const void *) name
,
7461 /* NOTE: We can assume slot != NULL here because xcalloc never returns
7476 update_breakpoint_locations (struct breakpoint
*b
,
7477 struct symtabs_and_lines sals
)
7481 struct bp_location
*existing_locations
= b
->loc
;
7483 /* If there's no new locations, and all existing locations
7484 are pending, don't do anything. This optimizes
7485 the common case where all locations are in the same
7486 shared library, that was unloaded. We'd like to
7487 retain the location, so that when the library
7488 is loaded again, we don't loose the enabled/disabled
7489 status of the individual locations. */
7490 if (all_locations_are_pending (existing_locations
) && sals
.nelts
== 0)
7495 for (i
= 0; i
< sals
.nelts
; ++i
)
7497 struct bp_location
*new_loc
=
7498 add_location_to_breakpoint (b
, &(sals
.sals
[i
]));
7500 /* Reparse conditions, they might contain references to the
7502 if (b
->cond_string
!= NULL
)
7504 struct gdb_exception e
;
7507 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7509 new_loc
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
),
7514 warning (_("failed to reevaluate condition for breakpoint %d: %s"),
7515 b
->number
, e
.message
);
7516 new_loc
->enabled
= 0;
7520 if (b
->source_file
!= NULL
)
7521 xfree (b
->source_file
);
7522 if (sals
.sals
[i
].symtab
== NULL
)
7523 b
->source_file
= NULL
;
7525 b
->source_file
= xstrdup (sals
.sals
[i
].symtab
->filename
);
7527 if (b
->line_number
== 0)
7528 b
->line_number
= sals
.sals
[i
].line
;
7531 /* Update locations of permanent breakpoints. */
7532 if (b
->enable_state
== bp_permanent
)
7533 make_breakpoint_permanent (b
);
7535 /* If possible, carry over 'disable' status from existing breakpoints. */
7537 struct bp_location
*e
= existing_locations
;
7538 /* If there are multiple breakpoints with the same function name,
7539 e.g. for inline functions, comparing function names won't work.
7540 Instead compare pc addresses; this is just a heuristic as things
7541 may have moved, but in practice it gives the correct answer
7542 often enough until a better solution is found. */
7543 int have_ambiguous_names
= ambiguous_names_p (b
->loc
);
7545 for (; e
; e
= e
->next
)
7547 if (!e
->enabled
&& e
->function_name
)
7549 struct bp_location
*l
= b
->loc
;
7550 if (have_ambiguous_names
)
7552 for (; l
; l
= l
->next
)
7553 if (e
->address
== l
->address
)
7561 for (; l
; l
= l
->next
)
7562 if (l
->function_name
7563 && strcmp (e
->function_name
, l
->function_name
) == 0)
7573 update_global_location_list (1);
7577 /* Reset a breakpoint given it's struct breakpoint * BINT.
7578 The value we return ends up being the return value from catch_errors.
7579 Unused in this case. */
7582 breakpoint_re_set_one (void *bint
)
7584 /* get past catch_errs */
7585 struct breakpoint
*b
= (struct breakpoint
*) bint
;
7589 int *not_found_ptr
= ¬_found
;
7590 struct symtabs_and_lines sals
= {};
7591 struct symtabs_and_lines expanded
;
7593 enum enable_state save_enable
;
7594 struct gdb_exception e
;
7595 struct cleanup
*cleanups
;
7600 warning (_("attempted to reset apparently deleted breakpoint #%d?"),
7604 case bp_hardware_breakpoint
:
7606 if (b
->addr_string
== NULL
)
7608 /* Anything without a string can't be re-set. */
7609 delete_breakpoint (b
);
7613 set_language (b
->language
);
7614 input_radix
= b
->input_radix
;
7616 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7618 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
,
7623 int not_found_and_ok
= 0;
7624 /* For pending breakpoints, it's expected that parsing
7625 will fail until the right shared library is loaded.
7626 User has already told to create pending breakpoints and
7627 don't need extra messages. If breakpoint is in bp_shlib_disabled
7628 state, then user already saw the message about that breakpoint
7629 being disabled, and don't want to see more errors. */
7631 && (b
->condition_not_parsed
7632 || (b
->loc
&& b
->loc
->shlib_disabled
)
7633 || b
->enable_state
== bp_disabled
))
7634 not_found_and_ok
= 1;
7636 if (!not_found_and_ok
)
7638 /* We surely don't want to warn about the same breakpoint
7639 10 times. One solution, implemented here, is disable
7640 the breakpoint on error. Another solution would be to
7641 have separate 'warning emitted' flag. Since this
7642 happens only when a binary has changed, I don't know
7643 which approach is better. */
7644 b
->enable_state
= bp_disabled
;
7645 throw_exception (e
);
7652 gdb_assert (sals
.nelts
== 1);
7653 resolve_sal_pc (&sals
.sals
[0]);
7654 if (b
->condition_not_parsed
&& s
&& s
[0])
7656 char *cond_string
= 0;
7660 find_condition_and_thread (s
, sals
.sals
[0].pc
,
7661 &cond_string
, &thread
, &task
);
7663 b
->cond_string
= cond_string
;
7666 b
->condition_not_parsed
= 0;
7668 expanded
= expand_line_sal_maybe (sals
.sals
[0]);
7669 cleanups
= make_cleanup (xfree
, sals
.sals
);
7670 update_breakpoint_locations (b
, expanded
);
7671 do_cleanups (cleanups
);
7675 case bp_hardware_watchpoint
:
7676 case bp_read_watchpoint
:
7677 case bp_access_watchpoint
:
7678 /* Watchpoint can be either on expression using entirely global variables,
7679 or it can be on local variables.
7681 Watchpoints of the first kind are never auto-deleted, and even persist
7682 across program restarts. Since they can use variables from shared
7683 libraries, we need to reparse expression as libraries are loaded
7686 Watchpoints on local variables can also change meaning as result
7687 of solib event. For example, if a watchpoint uses both a local and
7688 a global variables in expression, it's a local watchpoint, but
7689 unloading of a shared library will make the expression invalid.
7690 This is not a very common use case, but we still re-evaluate
7691 expression, to avoid surprises to the user.
7693 Note that for local watchpoints, we re-evaluate it only if
7694 watchpoints frame id is still valid. If it's not, it means
7695 the watchpoint is out of scope and will be deleted soon. In fact,
7696 I'm not sure we'll ever be called in this case.
7698 If a local watchpoint's frame id is still valid, then
7699 b->exp_valid_block is likewise valid, and we can safely use it.
7701 Don't do anything about disabled watchpoints, since they will
7702 be reevaluated again when enabled. */
7703 update_watchpoint (b
, 1 /* reparse */);
7705 /* We needn't really do anything to reset these, since the mask
7706 that requests them is unaffected by e.g., new libraries being
7712 printf_filtered (_("Deleting unknown breakpoint type %d\n"), b
->type
);
7714 /* Delete overlay event breakpoints; they will be reset later by
7715 breakpoint_re_set. */
7716 case bp_overlay_event
:
7717 delete_breakpoint (b
);
7720 /* This breakpoint is special, it's set up when the inferior
7721 starts and we really don't want to touch it. */
7722 case bp_shlib_event
:
7724 /* Like bp_shlib_event, this breakpoint type is special.
7725 Once it is set up, we do not want to touch it. */
7726 case bp_thread_event
:
7728 /* Keep temporary breakpoints, which can be encountered when we step
7729 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7730 Otherwise these should have been blown away via the cleanup chain
7731 or by breakpoint_init_inferior when we rerun the executable. */
7734 case bp_watchpoint_scope
:
7736 case bp_step_resume
:
7738 case bp_longjmp_resume
:
7745 /* Re-set all breakpoints after symbols have been re-loaded.
7747 If OBJFILE is non-null, create overlay break point only in OBJFILE
7748 (speed optimization). Otherwise rescan all loaded objfiles. */
7751 breakpoint_re_set_objfile (struct objfile
*objfile
)
7753 struct breakpoint
*b
, *temp
;
7754 enum language save_language
;
7755 int save_input_radix
;
7757 save_language
= current_language
->la_language
;
7758 save_input_radix
= input_radix
;
7759 ALL_BREAKPOINTS_SAFE (b
, temp
)
7761 /* Format possible error msg */
7762 char *message
= xstrprintf ("Error in re-setting breakpoint %d: ",
7764 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7765 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7766 do_cleanups (cleanups
);
7768 set_language (save_language
);
7769 input_radix
= save_input_radix
;
7771 if (objfile
== NULL
)
7772 ALL_OBJFILES (objfile
)
7773 create_overlay_event_breakpoint ("_ovly_debug_event", objfile
);
7775 create_overlay_event_breakpoint ("_ovly_debug_event", objfile
);
7778 /* Re-set all breakpoints after symbols have been re-loaded. */
7781 breakpoint_re_set (void)
7783 breakpoint_re_set_objfile (NULL
);
7786 /* Reset the thread number of this breakpoint:
7788 - If the breakpoint is for all threads, leave it as-is.
7789 - Else, reset it to the current thread for inferior_ptid. */
7791 breakpoint_re_set_thread (struct breakpoint
*b
)
7793 if (b
->thread
!= -1)
7795 if (in_thread_list (inferior_ptid
))
7796 b
->thread
= pid_to_thread_id (inferior_ptid
);
7800 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7801 If from_tty is nonzero, it prints a message to that effect,
7802 which ends with a period (no newline). */
7805 set_ignore_count (int bptnum
, int count
, int from_tty
)
7807 struct breakpoint
*b
;
7813 if (b
->number
== bptnum
)
7815 b
->ignore_count
= count
;
7819 printf_filtered (_("Will stop next time breakpoint %d is reached."),
7821 else if (count
== 1)
7822 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
7825 printf_filtered (_("Will ignore next %d crossings of breakpoint %d."),
7828 breakpoints_changed ();
7829 observer_notify_breakpoint_modified (b
->number
);
7833 error (_("No breakpoint number %d."), bptnum
);
7837 make_breakpoint_silent (struct breakpoint
*b
)
7839 /* Silence the breakpoint. */
7843 /* Command to set ignore-count of breakpoint N to COUNT. */
7846 ignore_command (char *args
, int from_tty
)
7852 error_no_arg (_("a breakpoint number"));
7854 num
= get_number (&p
);
7856 error (_("bad breakpoint number: '%s'"), args
);
7858 error (_("Second argument (specified ignore-count) is missing."));
7860 set_ignore_count (num
,
7861 longest_to_int (value_as_long (parse_and_eval (p
))),
7864 printf_filtered ("\n");
7867 /* Call FUNCTION on each of the breakpoints
7868 whose numbers are given in ARGS. */
7871 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7876 struct breakpoint
*b
, *tmp
;
7880 error_no_arg (_("one or more breakpoint numbers"));
7887 num
= get_number_or_range (&p1
);
7890 warning (_("bad breakpoint number at or near '%s'"), p
);
7894 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7895 if (b
->number
== num
)
7897 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7900 if (related_breakpoint
)
7901 function (related_breakpoint
);
7905 printf_unfiltered (_("No breakpoint number %d.\n"), num
);
7911 static struct bp_location
*
7912 find_location_by_number (char *number
)
7914 char *dot
= strchr (number
, '.');
7918 struct breakpoint
*b
;
7919 struct bp_location
*loc
;
7924 bp_num
= get_number_or_range (&p1
);
7926 error (_("Bad breakpoint number '%s'"), number
);
7929 if (b
->number
== bp_num
)
7934 if (!b
|| b
->number
!= bp_num
)
7935 error (_("Bad breakpoint number '%s'"), number
);
7938 loc_num
= get_number_or_range (&p1
);
7940 error (_("Bad breakpoint location number '%s'"), number
);
7944 for (;loc_num
&& loc
; --loc_num
, loc
= loc
->next
)
7947 error (_("Bad breakpoint location number '%s'"), dot
+1);
7953 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7954 If from_tty is nonzero, it prints a message to that effect,
7955 which ends with a period (no newline). */
7958 disable_breakpoint (struct breakpoint
*bpt
)
7960 /* Never disable a watchpoint scope breakpoint; we want to
7961 hit them when we leave scope so we can delete both the
7962 watchpoint and its scope breakpoint at that time. */
7963 if (bpt
->type
== bp_watchpoint_scope
)
7966 /* You can't disable permanent breakpoints. */
7967 if (bpt
->enable_state
== bp_permanent
)
7970 bpt
->enable_state
= bp_disabled
;
7972 update_global_location_list (0);
7974 observer_notify_breakpoint_modified (bpt
->number
);
7978 disable_command (char *args
, int from_tty
)
7980 struct breakpoint
*bpt
;
7982 ALL_BREAKPOINTS (bpt
)
7986 warning (_("attempted to disable apparently deleted breakpoint #%d?"),
7992 case bp_hardware_breakpoint
:
7994 case bp_hardware_watchpoint
:
7995 case bp_read_watchpoint
:
7996 case bp_access_watchpoint
:
7997 disable_breakpoint (bpt
);
8001 else if (strchr (args
, '.'))
8003 struct bp_location
*loc
= find_location_by_number (args
);
8006 update_global_location_list (0);
8009 map_breakpoint_numbers (args
, disable_breakpoint
);
8013 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
8015 int target_resources_ok
, other_type_used
;
8018 if (bpt
->type
== bp_hardware_breakpoint
)
8021 i
= hw_breakpoint_used_count ();
8022 target_resources_ok
=
8023 target_can_use_hardware_watchpoint (bp_hardware_breakpoint
,
8025 if (target_resources_ok
== 0)
8026 error (_("No hardware breakpoint support in the target."));
8027 else if (target_resources_ok
< 0)
8028 error (_("Hardware breakpoints used exceeds limit."));
8031 if (bpt
->type
== bp_watchpoint
||
8032 bpt
->type
== bp_hardware_watchpoint
||
8033 bpt
->type
== bp_read_watchpoint
||
8034 bpt
->type
== bp_access_watchpoint
)
8036 struct gdb_exception e
;
8038 TRY_CATCH (e
, RETURN_MASK_ALL
)
8040 update_watchpoint (bpt
, 1 /* reparse */);
8044 exception_fprintf (gdb_stderr
, e
, _("Cannot enable watchpoint %d: "),
8050 if (bpt
->enable_state
!= bp_permanent
)
8051 bpt
->enable_state
= bp_enabled
;
8052 bpt
->disposition
= disposition
;
8053 update_global_location_list (1);
8054 breakpoints_changed ();
8056 observer_notify_breakpoint_modified (bpt
->number
);
8061 enable_breakpoint (struct breakpoint
*bpt
)
8063 do_enable_breakpoint (bpt
, bpt
->disposition
);
8066 /* The enable command enables the specified breakpoints (or all defined
8067 breakpoints) so they once again become (or continue to be) effective
8068 in stopping the inferior. */
8071 enable_command (char *args
, int from_tty
)
8073 struct breakpoint
*bpt
;
8075 ALL_BREAKPOINTS (bpt
)
8079 warning (_("attempted to enable apparently deleted breakpoint #%d?"),
8085 case bp_hardware_breakpoint
:
8087 case bp_hardware_watchpoint
:
8088 case bp_read_watchpoint
:
8089 case bp_access_watchpoint
:
8090 enable_breakpoint (bpt
);
8094 else if (strchr (args
, '.'))
8096 struct bp_location
*loc
= find_location_by_number (args
);
8099 update_global_location_list (1);
8102 map_breakpoint_numbers (args
, enable_breakpoint
);
8106 enable_once_breakpoint (struct breakpoint
*bpt
)
8108 do_enable_breakpoint (bpt
, disp_disable
);
8112 enable_once_command (char *args
, int from_tty
)
8114 map_breakpoint_numbers (args
, enable_once_breakpoint
);
8118 enable_delete_breakpoint (struct breakpoint
*bpt
)
8120 do_enable_breakpoint (bpt
, disp_del
);
8124 enable_delete_command (char *args
, int from_tty
)
8126 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
8130 set_breakpoint_cmd (char *args
, int from_tty
)
8135 show_breakpoint_cmd (char *args
, int from_tty
)
8139 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
8141 struct symtabs_and_lines
8142 decode_line_spec_1 (char *string
, int funfirstline
)
8144 struct symtabs_and_lines sals
;
8146 error (_("Empty line specification."));
8147 if (default_breakpoint_valid
)
8148 sals
= decode_line_1 (&string
, funfirstline
,
8149 default_breakpoint_symtab
,
8150 default_breakpoint_line
,
8151 (char ***) NULL
, NULL
);
8153 sals
= decode_line_1 (&string
, funfirstline
,
8154 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
8156 error (_("Junk at end of line specification: %s"), string
);
8160 /* Create and insert a raw software breakpoint at PC. Return an
8161 identifier, which should be used to remove the breakpoint later.
8162 In general, places which call this should be using something on the
8163 breakpoint chain instead; this function should be eliminated
8167 deprecated_insert_raw_breakpoint (CORE_ADDR pc
)
8169 struct bp_target_info
*bp_tgt
;
8171 bp_tgt
= xmalloc (sizeof (struct bp_target_info
));
8172 memset (bp_tgt
, 0, sizeof (struct bp_target_info
));
8174 bp_tgt
->placed_address
= pc
;
8175 if (target_insert_breakpoint (bp_tgt
) != 0)
8177 /* Could not insert the breakpoint. */
8185 /* Remove a breakpoint BP inserted by deprecated_insert_raw_breakpoint. */
8188 deprecated_remove_raw_breakpoint (void *bp
)
8190 struct bp_target_info
*bp_tgt
= bp
;
8193 ret
= target_remove_breakpoint (bp_tgt
);
8199 /* One (or perhaps two) breakpoints used for software single stepping. */
8201 static void *single_step_breakpoints
[2];
8203 /* Create and insert a breakpoint for software single step. */
8206 insert_single_step_breakpoint (CORE_ADDR next_pc
)
8210 if (single_step_breakpoints
[0] == NULL
)
8211 bpt_p
= &single_step_breakpoints
[0];
8214 gdb_assert (single_step_breakpoints
[1] == NULL
);
8215 bpt_p
= &single_step_breakpoints
[1];
8218 /* NOTE drow/2006-04-11: A future improvement to this function would be
8219 to only create the breakpoints once, and actually put them on the
8220 breakpoint chain. That would let us use set_raw_breakpoint. We could
8221 adjust the addresses each time they were needed. Doing this requires
8222 corresponding changes elsewhere where single step breakpoints are
8223 handled, however. So, for now, we use this. */
8225 *bpt_p
= deprecated_insert_raw_breakpoint (next_pc
);
8227 error (_("Could not insert single-step breakpoint at 0x%s"),
8228 paddr_nz (next_pc
));
8231 /* Remove and delete any breakpoints used for software single step. */
8234 remove_single_step_breakpoints (void)
8236 gdb_assert (single_step_breakpoints
[0] != NULL
);
8238 /* See insert_single_step_breakpoint for more about this deprecated
8240 deprecated_remove_raw_breakpoint (single_step_breakpoints
[0]);
8241 single_step_breakpoints
[0] = NULL
;
8243 if (single_step_breakpoints
[1] != NULL
)
8245 deprecated_remove_raw_breakpoint (single_step_breakpoints
[1]);
8246 single_step_breakpoints
[1] = NULL
;
8250 /* Check whether a software single-step breakpoint is inserted at PC. */
8253 single_step_breakpoint_inserted_here_p (CORE_ADDR pc
)
8257 for (i
= 0; i
< 2; i
++)
8259 struct bp_target_info
*bp_tgt
= single_step_breakpoints
[i
];
8260 if (bp_tgt
&& bp_tgt
->placed_address
== pc
)
8267 /* Tracepoint-specific operations. */
8269 /* Set tracepoint count to NUM. */
8271 set_tracepoint_count (int num
)
8273 tracepoint_count
= num
;
8274 set_internalvar_integer (lookup_internalvar ("tpnum"), num
);
8278 trace_command (char *arg
, int from_tty
)
8280 break_command_really (arg
,
8281 NULL
, 0, 1 /* parse arg */,
8282 0 /* tempflag */, 0 /* hardwareflag */,
8284 0 /* Ignore count */,
8285 pending_break_support
,
8289 set_tracepoint_count (breakpoint_count
);
8292 /* Print information on tracepoint number TPNUM_EXP, or all if
8296 tracepoints_info (char *tpnum_exp
, int from_tty
)
8298 struct breakpoint
*b
;
8299 int tps_to_list
= 0;
8301 /* In the no-arguments case, say "No tracepoints" if none found. */
8314 ui_out_message (uiout
, 0, "No tracepoints.\n");
8319 /* Otherwise be the same as "info break". */
8320 breakpoints_info (tpnum_exp
, from_tty
);
8323 /* The 'enable trace' command enables tracepoints.
8324 Not supported by all targets. */
8326 enable_trace_command (char *args
, int from_tty
)
8328 enable_command (args
, from_tty
);
8331 /* The 'disable trace' command disables tracepoints.
8332 Not supported by all targets. */
8334 disable_trace_command (char *args
, int from_tty
)
8336 disable_command (args
, from_tty
);
8339 /* Remove a tracepoint (or all if no argument) */
8341 delete_trace_command (char *arg
, int from_tty
)
8343 struct breakpoint
*b
, *temp
;
8349 int breaks_to_delete
= 0;
8351 /* Delete all breakpoints if no argument.
8352 Do not delete internal or call-dummy breakpoints, these
8353 have to be deleted with an explicit breakpoint number argument. */
8358 breaks_to_delete
= 1;
8363 /* Ask user only if there are some breakpoints to delete. */
8365 || (breaks_to_delete
&& query (_("Delete all tracepoints? "))))
8367 ALL_BREAKPOINTS_SAFE (b
, temp
)
8369 if (b
->type
== bp_tracepoint
&&
8371 delete_breakpoint (b
);
8376 map_breakpoint_numbers (arg
, delete_breakpoint
);
8379 /* Set passcount for tracepoint.
8381 First command argument is passcount, second is tracepoint number.
8382 If tracepoint number omitted, apply to most recently defined.
8383 Also accepts special argument "all". */
8386 trace_pass_command (char *args
, int from_tty
)
8388 struct breakpoint
*t1
= (struct breakpoint
*) -1, *t2
;
8392 if (args
== 0 || *args
== 0)
8393 error (_("passcount command requires an argument (count + optional TP num)"));
8395 count
= strtoul (args
, &args
, 10); /* Count comes first, then TP num. */
8397 while (*args
&& isspace ((int) *args
))
8400 if (*args
&& strncasecmp (args
, "all", 3) == 0)
8402 args
+= 3; /* Skip special argument "all". */
8405 error (_("Junk at end of arguments."));
8408 t1
= get_tracepoint_by_number (&args
, 1, 1);
8414 ALL_TRACEPOINTS (t2
)
8415 if (t1
== (struct breakpoint
*) -1 || t1
== t2
)
8417 t2
->pass_count
= count
;
8418 observer_notify_tracepoint_modified (t2
->number
);
8420 printf_filtered (_("Setting tracepoint %d's passcount to %d\n"),
8424 t1
= get_tracepoint_by_number (&args
, 1, 0);
8431 get_tracepoint (int num
)
8433 struct breakpoint
*t
;
8436 if (t
->number
== num
)
8442 /* Utility: parse a tracepoint number and look it up in the list.
8443 If MULTI_P is true, there might be a range of tracepoints in ARG.
8444 if OPTIONAL_P is true, then if the argument is missing, the most
8445 recent tracepoint (tracepoint_count) is returned. */
8447 get_tracepoint_by_number (char **arg
, int multi_p
, int optional_p
)
8449 extern int tracepoint_count
;
8450 struct breakpoint
*t
;
8452 char *instring
= arg
== NULL
? NULL
: *arg
;
8454 if (arg
== NULL
|| *arg
== NULL
|| ! **arg
)
8457 tpnum
= tracepoint_count
;
8459 error_no_arg (_("tracepoint number"));
8462 tpnum
= multi_p
? get_number_or_range (arg
) : get_number (arg
);
8466 if (instring
&& *instring
)
8467 printf_filtered (_("bad tracepoint number at or near '%s'\n"),
8470 printf_filtered (_("Tracepoint argument missing and no previous tracepoint\n"));
8475 if (t
->number
== tpnum
)
8480 /* FIXME: if we are in the middle of a range we don't want to give
8481 a message. The current interface to get_number_or_range doesn't
8482 allow us to discover this. */
8483 printf_unfiltered ("No tracepoint number %d.\n", tpnum
);
8487 /* save-tracepoints command */
8489 tracepoint_save_command (char *args
, int from_tty
)
8491 struct breakpoint
*tp
;
8493 struct action_line
*line
;
8495 char *i1
= " ", *i2
= " ";
8496 char *indent
, *actionline
, *pathname
;
8498 struct cleanup
*cleanup
;
8500 if (args
== 0 || *args
== 0)
8501 error (_("Argument required (file name in which to save tracepoints)"));
8503 /* See if we have anything to save. */
8504 ALL_TRACEPOINTS (tp
)
8511 warning (_("save-tracepoints: no tracepoints to save."));
8515 pathname
= tilde_expand (args
);
8516 cleanup
= make_cleanup (xfree
, pathname
);
8517 if (!(fp
= fopen (pathname
, "w")))
8518 error (_("Unable to open file '%s' for saving tracepoints (%s)"),
8519 args
, safe_strerror (errno
));
8520 make_cleanup_fclose (fp
);
8522 ALL_TRACEPOINTS (tp
)
8524 if (tp
->addr_string
)
8525 fprintf (fp
, "trace %s\n", tp
->addr_string
);
8528 sprintf_vma (tmp
, tp
->loc
->address
);
8529 fprintf (fp
, "trace *0x%s\n", tmp
);
8533 fprintf (fp
, " passcount %d\n", tp
->pass_count
);
8537 fprintf (fp
, " actions\n");
8539 for (line
= tp
->actions
; line
; line
= line
->next
)
8541 struct cmd_list_element
*cmd
;
8543 QUIT
; /* allow user to bail out with ^C */
8544 actionline
= line
->action
;
8545 while (isspace ((int) *actionline
))
8548 fprintf (fp
, "%s%s\n", indent
, actionline
);
8549 if (*actionline
!= '#') /* skip for comment lines */
8551 cmd
= lookup_cmd (&actionline
, cmdlist
, "", -1, 1);
8553 error (_("Bad action list item: %s"), actionline
);
8554 if (cmd_cfunc_eq (cmd
, while_stepping_pseudocommand
))
8556 else if (cmd_cfunc_eq (cmd
, end_actions_pseudocommand
))
8562 do_cleanups (cleanup
);
8564 printf_filtered (_("Tracepoints saved to file '%s'.\n"), args
);
8568 /* Create a vector of all tracepoints. */
8573 VEC(breakpoint_p
) *tp_vec
= 0;
8574 struct breakpoint
*tp
;
8576 ALL_TRACEPOINTS (tp
)
8578 VEC_safe_push (breakpoint_p
, tp_vec
, tp
);
8585 /* This help string is used for the break, hbreak, tbreak and thbreak commands.
8586 It is defined as a macro to prevent duplication.
8587 COMMAND should be a string constant containing the name of the command. */
8588 #define BREAK_ARGS_HELP(command) \
8589 command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\
8590 LOCATION may be a line number, function name, or \"*\" and an address.\n\
8591 If a line number is specified, break at start of code for that line.\n\
8592 If a function is specified, break at start of code for that function.\n\
8593 If an address is specified, break at that exact address.\n\
8594 With no LOCATION, uses current execution address of selected stack frame.\n\
8595 This is useful for breaking on return to a stack frame.\n\
8597 THREADNUM is the number from \"info threads\".\n\
8598 CONDITION is a boolean expression.\n\
8600 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
8602 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
8604 /* List of subcommands for "catch". */
8605 static struct cmd_list_element
*catch_cmdlist
;
8607 /* List of subcommands for "tcatch". */
8608 static struct cmd_list_element
*tcatch_cmdlist
;
8610 /* Like add_cmd, but add the command to both the "catch" and "tcatch"
8611 lists, and pass some additional user data to the command function. */
8613 add_catch_command (char *name
, char *docstring
,
8614 void (*sfunc
) (char *args
, int from_tty
,
8615 struct cmd_list_element
*command
),
8616 void *user_data_catch
,
8617 void *user_data_tcatch
)
8619 struct cmd_list_element
*command
;
8621 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
8623 set_cmd_sfunc (command
, sfunc
);
8624 set_cmd_context (command
, user_data_catch
);
8626 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
8628 set_cmd_sfunc (command
, sfunc
);
8629 set_cmd_context (command
, user_data_tcatch
);
8633 _initialize_breakpoint (void)
8635 static struct cmd_list_element
*breakpoint_set_cmdlist
;
8636 static struct cmd_list_element
*breakpoint_show_cmdlist
;
8637 struct cmd_list_element
*c
;
8639 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
8641 breakpoint_chain
= 0;
8642 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
8643 before a breakpoint is set. */
8644 breakpoint_count
= 0;
8646 tracepoint_count
= 0;
8648 add_com ("ignore", class_breakpoint
, ignore_command
, _("\
8649 Set ignore-count of breakpoint number N to COUNT.\n\
8650 Usage is `ignore N COUNT'."));
8652 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
8654 add_com ("commands", class_breakpoint
, commands_command
, _("\
8655 Set commands to be executed when a breakpoint is hit.\n\
8656 Give breakpoint number as argument after \"commands\".\n\
8657 With no argument, the targeted breakpoint is the last one set.\n\
8658 The commands themselves follow starting on the next line.\n\
8659 Type a line containing \"end\" to indicate the end of them.\n\
8660 Give \"silent\" as the first line to make the breakpoint silent;\n\
8661 then no output is printed when it is hit, except what the commands print."));
8663 add_com ("condition", class_breakpoint
, condition_command
, _("\
8664 Specify breakpoint number N to break only if COND is true.\n\
8665 Usage is `condition N COND', where N is an integer and COND is an\n\
8666 expression to be evaluated whenever breakpoint N is reached."));
8668 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
, _("\
8669 Set a temporary breakpoint.\n\
8670 Like \"break\" except the breakpoint is only temporary,\n\
8671 so it will be deleted when hit. Equivalent to \"break\" followed\n\
8672 by using \"enable delete\" on the breakpoint number.\n\
8674 BREAK_ARGS_HELP ("tbreak")));
8675 set_cmd_completer (c
, location_completer
);
8677 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
, _("\
8678 Set a hardware assisted breakpoint.\n\
8679 Like \"break\" except the breakpoint requires hardware support,\n\
8680 some target hardware may not have this support.\n\
8682 BREAK_ARGS_HELP ("hbreak")));
8683 set_cmd_completer (c
, location_completer
);
8685 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
, _("\
8686 Set a temporary hardware assisted breakpoint.\n\
8687 Like \"hbreak\" except the breakpoint is only temporary,\n\
8688 so it will be deleted when hit.\n\
8690 BREAK_ARGS_HELP ("thbreak")));
8691 set_cmd_completer (c
, location_completer
);
8693 add_prefix_cmd ("enable", class_breakpoint
, enable_command
, _("\
8694 Enable some breakpoints.\n\
8695 Give breakpoint numbers (separated by spaces) as arguments.\n\
8696 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8697 This is used to cancel the effect of the \"disable\" command.\n\
8698 With a subcommand you can enable temporarily."),
8699 &enablelist
, "enable ", 1, &cmdlist
);
8701 add_com ("ab", class_breakpoint
, enable_command
, _("\
8702 Enable some breakpoints.\n\
8703 Give breakpoint numbers (separated by spaces) as arguments.\n\
8704 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8705 This is used to cancel the effect of the \"disable\" command.\n\
8706 With a subcommand you can enable temporarily."));
8708 add_com_alias ("en", "enable", class_breakpoint
, 1);
8710 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
, _("\
8711 Enable some breakpoints.\n\
8712 Give breakpoint numbers (separated by spaces) as arguments.\n\
8713 This is used to cancel the effect of the \"disable\" command.\n\
8714 May be abbreviated to simply \"enable\".\n"),
8715 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
8717 add_cmd ("once", no_class
, enable_once_command
, _("\
8718 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8719 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8722 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8723 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8724 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8727 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8728 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8729 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8732 add_cmd ("once", no_class
, enable_once_command
, _("\
8733 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8734 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8737 add_prefix_cmd ("disable", class_breakpoint
, disable_command
, _("\
8738 Disable some breakpoints.\n\
8739 Arguments are breakpoint numbers with spaces in between.\n\
8740 To disable all breakpoints, give no argument.\n\
8741 A disabled breakpoint is not forgotten, but has no effect until reenabled."),
8742 &disablelist
, "disable ", 1, &cmdlist
);
8743 add_com_alias ("dis", "disable", class_breakpoint
, 1);
8744 add_com_alias ("disa", "disable", class_breakpoint
, 1);
8746 add_com ("sb", class_breakpoint
, disable_command
, _("\
8747 Disable some breakpoints.\n\
8748 Arguments are breakpoint numbers with spaces in between.\n\
8749 To disable all breakpoints, give no argument.\n\
8750 A disabled breakpoint is not forgotten, but has no effect until reenabled."));
8752 add_cmd ("breakpoints", class_alias
, disable_command
, _("\
8753 Disable some breakpoints.\n\
8754 Arguments are breakpoint numbers with spaces in between.\n\
8755 To disable all breakpoints, give no argument.\n\
8756 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
8757 This command may be abbreviated \"disable\"."),
8760 add_prefix_cmd ("delete", class_breakpoint
, delete_command
, _("\
8761 Delete some breakpoints or auto-display expressions.\n\
8762 Arguments are breakpoint numbers with spaces in between.\n\
8763 To delete all breakpoints, give no argument.\n\
8765 Also a prefix command for deletion of other GDB objects.\n\
8766 The \"unset\" command is also an alias for \"delete\"."),
8767 &deletelist
, "delete ", 1, &cmdlist
);
8768 add_com_alias ("d", "delete", class_breakpoint
, 1);
8769 add_com_alias ("del", "delete", class_breakpoint
, 1);
8771 add_com ("db", class_breakpoint
, delete_command
, _("\
8772 Delete some breakpoints.\n\
8773 Arguments are breakpoint numbers with spaces in between.\n\
8774 To delete all breakpoints, give no argument.\n"));
8776 add_cmd ("breakpoints", class_alias
, delete_command
, _("\
8777 Delete some breakpoints or auto-display expressions.\n\
8778 Arguments are breakpoint numbers with spaces in between.\n\
8779 To delete all breakpoints, give no argument.\n\
8780 This command may be abbreviated \"delete\"."),
8783 add_com ("clear", class_breakpoint
, clear_command
, _("\
8784 Clear breakpoint at specified line or function.\n\
8785 Argument may be line number, function name, or \"*\" and an address.\n\
8786 If line number is specified, all breakpoints in that line are cleared.\n\
8787 If function is specified, breakpoints at beginning of function are cleared.\n\
8788 If an address is specified, breakpoints at that address are cleared.\n\
8790 With no argument, clears all breakpoints in the line that the selected frame\n\
8793 See also the \"delete\" command which clears breakpoints by number."));
8795 c
= add_com ("break", class_breakpoint
, break_command
, _("\
8796 Set breakpoint at specified line or function.\n"
8797 BREAK_ARGS_HELP ("break")));
8798 set_cmd_completer (c
, location_completer
);
8800 add_com_alias ("b", "break", class_run
, 1);
8801 add_com_alias ("br", "break", class_run
, 1);
8802 add_com_alias ("bre", "break", class_run
, 1);
8803 add_com_alias ("brea", "break", class_run
, 1);
8806 add_com_alias ("ba", "break", class_breakpoint
, 1);
8810 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
, _("\
8811 Break in function/address or break at a line in the current file."),
8812 &stoplist
, "stop ", 1, &cmdlist
);
8813 add_cmd ("in", class_breakpoint
, stopin_command
,
8814 _("Break in function or address."), &stoplist
);
8815 add_cmd ("at", class_breakpoint
, stopat_command
,
8816 _("Break at a line in the current file."), &stoplist
);
8817 add_com ("status", class_info
, breakpoints_info
, _("\
8818 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8819 The \"Type\" column indicates one of:\n\
8820 \tbreakpoint - normal breakpoint\n\
8821 \twatchpoint - watchpoint\n\
8822 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8823 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8824 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8825 address and file/line number respectively.\n\
8827 Convenience variable \"$_\" and default examine address for \"x\"\n\
8828 are set to the address of the last breakpoint listed unless the command\n\
8829 is prefixed with \"server \".\n\n\
8830 Convenience variable \"$bpnum\" contains the number of the last\n\
8834 add_info ("breakpoints", breakpoints_info
, _("\
8835 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8836 The \"Type\" column indicates one of:\n\
8837 \tbreakpoint - normal breakpoint\n\
8838 \twatchpoint - watchpoint\n\
8839 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8840 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8841 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8842 address and file/line number respectively.\n\
8844 Convenience variable \"$_\" and default examine address for \"x\"\n\
8845 are set to the address of the last breakpoint listed unless the command\n\
8846 is prefixed with \"server \".\n\n\
8847 Convenience variable \"$bpnum\" contains the number of the last\n\
8851 add_com ("lb", class_breakpoint
, breakpoints_info
, _("\
8852 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8853 The \"Type\" column indicates one of:\n\
8854 \tbreakpoint - normal breakpoint\n\
8855 \twatchpoint - watchpoint\n\
8856 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8857 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8858 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8859 address and file/line number respectively.\n\
8861 Convenience variable \"$_\" and default examine address for \"x\"\n\
8862 are set to the address of the last breakpoint listed unless the command\n\
8863 is prefixed with \"server \".\n\n\
8864 Convenience variable \"$bpnum\" contains the number of the last\n\
8867 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
, _("\
8868 Status of all breakpoints, or breakpoint number NUMBER.\n\
8869 The \"Type\" column indicates one of:\n\
8870 \tbreakpoint - normal breakpoint\n\
8871 \twatchpoint - watchpoint\n\
8872 \tlongjmp - internal breakpoint used to step through longjmp()\n\
8873 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
8874 \tuntil - internal breakpoint used by the \"until\" command\n\
8875 \tfinish - internal breakpoint used by the \"finish\" command\n\
8876 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8877 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8878 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8879 address and file/line number respectively.\n\
8881 Convenience variable \"$_\" and default examine address for \"x\"\n\
8882 are set to the address of the last breakpoint listed unless the command\n\
8883 is prefixed with \"server \".\n\n\
8884 Convenience variable \"$bpnum\" contains the number of the last\n\
8886 &maintenanceinfolist
);
8888 add_prefix_cmd ("catch", class_breakpoint
, catch_command
, _("\
8889 Set catchpoints to catch events."),
8890 &catch_cmdlist
, "catch ",
8891 0/*allow-unknown*/, &cmdlist
);
8893 add_prefix_cmd ("tcatch", class_breakpoint
, tcatch_command
, _("\
8894 Set temporary catchpoints to catch events."),
8895 &tcatch_cmdlist
, "tcatch ",
8896 0/*allow-unknown*/, &cmdlist
);
8898 /* Add catch and tcatch sub-commands. */
8899 add_catch_command ("catch", _("\
8900 Catch an exception, when caught.\n\
8901 With an argument, catch only exceptions with the given name."),
8902 catch_catch_command
,
8905 add_catch_command ("throw", _("\
8906 Catch an exception, when thrown.\n\
8907 With an argument, catch only exceptions with the given name."),
8908 catch_throw_command
,
8911 add_catch_command ("fork", _("Catch calls to fork."),
8912 catch_fork_command_1
,
8913 (void *) (uintptr_t) catch_fork_permanent
,
8914 (void *) (uintptr_t) catch_fork_temporary
);
8915 add_catch_command ("vfork", _("Catch calls to vfork."),
8916 catch_fork_command_1
,
8917 (void *) (uintptr_t) catch_vfork_permanent
,
8918 (void *) (uintptr_t) catch_vfork_temporary
);
8919 add_catch_command ("exec", _("Catch calls to exec."),
8920 catch_exec_command_1
,
8923 add_catch_command ("exception", _("\
8924 Catch Ada exceptions, when raised.\n\
8925 With an argument, catch only exceptions with the given name."),
8926 catch_ada_exception_command
,
8929 add_catch_command ("assert", _("\
8930 Catch failed Ada assertions, when raised.\n\
8931 With an argument, catch only exceptions with the given name."),
8932 catch_assert_command
,
8936 c
= add_com ("watch", class_breakpoint
, watch_command
, _("\
8937 Set a watchpoint for an expression.\n\
8938 A watchpoint stops execution of your program whenever the value of\n\
8939 an expression changes."));
8940 set_cmd_completer (c
, expression_completer
);
8942 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
, _("\
8943 Set a read watchpoint for an expression.\n\
8944 A watchpoint stops execution of your program whenever the value of\n\
8945 an expression is read."));
8946 set_cmd_completer (c
, expression_completer
);
8948 c
= add_com ("awatch", class_breakpoint
, awatch_command
, _("\
8949 Set a watchpoint for an expression.\n\
8950 A watchpoint stops execution of your program whenever the value of\n\
8951 an expression is either read or written."));
8952 set_cmd_completer (c
, expression_completer
);
8954 add_info ("watchpoints", breakpoints_info
,
8955 _("Synonym for ``info breakpoints''."));
8958 /* XXX: cagney/2005-02-23: This should be a boolean, and should
8959 respond to changes - contrary to the description. */
8960 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support
,
8961 &can_use_hw_watchpoints
, _("\
8962 Set debugger's willingness to use watchpoint hardware."), _("\
8963 Show debugger's willingness to use watchpoint hardware."), _("\
8964 If zero, gdb will not use hardware for new watchpoints, even if\n\
8965 such is available. (However, any hardware watchpoints that were\n\
8966 created before setting this to nonzero, will continue to use watchpoint\n\
8969 show_can_use_hw_watchpoints
,
8970 &setlist
, &showlist
);
8972 can_use_hw_watchpoints
= 1;
8974 /* Tracepoint manipulation commands. */
8976 c
= add_com ("trace", class_breakpoint
, trace_command
, _("\
8977 Set a tracepoint at specified line or function.\n\
8979 BREAK_ARGS_HELP ("trace") "\n\
8980 Do \"help tracepoints\" for info on other tracepoint commands."));
8981 set_cmd_completer (c
, location_completer
);
8983 add_com_alias ("tp", "trace", class_alias
, 0);
8984 add_com_alias ("tr", "trace", class_alias
, 1);
8985 add_com_alias ("tra", "trace", class_alias
, 1);
8986 add_com_alias ("trac", "trace", class_alias
, 1);
8988 add_info ("tracepoints", tracepoints_info
, _("\
8989 Status of tracepoints, or tracepoint number NUMBER.\n\
8990 Convenience variable \"$tpnum\" contains the number of the\n\
8991 last tracepoint set."));
8993 add_info_alias ("tp", "tracepoints", 1);
8995 add_cmd ("tracepoints", class_trace
, delete_trace_command
, _("\
8996 Delete specified tracepoints.\n\
8997 Arguments are tracepoint numbers, separated by spaces.\n\
8998 No argument means delete all tracepoints."),
9001 c
= add_cmd ("tracepoints", class_trace
, disable_trace_command
, _("\
9002 Disable specified tracepoints.\n\
9003 Arguments are tracepoint numbers, separated by spaces.\n\
9004 No argument means disable all tracepoints."),
9006 deprecate_cmd (c
, "disable");
9008 c
= add_cmd ("tracepoints", class_trace
, enable_trace_command
, _("\
9009 Enable specified tracepoints.\n\
9010 Arguments are tracepoint numbers, separated by spaces.\n\
9011 No argument means enable all tracepoints."),
9013 deprecate_cmd (c
, "enable");
9015 add_com ("passcount", class_trace
, trace_pass_command
, _("\
9016 Set the passcount for a tracepoint.\n\
9017 The trace will end when the tracepoint has been passed 'count' times.\n\
9018 Usage: passcount COUNT TPNUM, where TPNUM may also be \"all\";\n\
9019 if TPNUM is omitted, passcount refers to the last tracepoint defined."));
9021 c
= add_com ("save-tracepoints", class_trace
, tracepoint_save_command
, _("\
9022 Save current tracepoint definitions as a script.\n\
9023 Use the 'source' command in another debug session to restore them."));
9024 set_cmd_completer (c
, filename_completer
);
9026 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, _("\
9027 Breakpoint specific settings\n\
9028 Configure various breakpoint-specific variables such as\n\
9029 pending breakpoint behavior"),
9030 &breakpoint_set_cmdlist
, "set breakpoint ",
9031 0/*allow-unknown*/, &setlist
);
9032 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, _("\
9033 Breakpoint specific settings\n\
9034 Configure various breakpoint-specific variables such as\n\
9035 pending breakpoint behavior"),
9036 &breakpoint_show_cmdlist
, "show breakpoint ",
9037 0/*allow-unknown*/, &showlist
);
9039 add_setshow_auto_boolean_cmd ("pending", no_class
,
9040 &pending_break_support
, _("\
9041 Set debugger's behavior regarding pending breakpoints."), _("\
9042 Show debugger's behavior regarding pending breakpoints."), _("\
9043 If on, an unrecognized breakpoint location will cause gdb to create a\n\
9044 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
9045 an error. If auto, an unrecognized breakpoint location results in a\n\
9046 user-query to see if a pending breakpoint should be created."),
9048 show_pending_break_support
,
9049 &breakpoint_set_cmdlist
,
9050 &breakpoint_show_cmdlist
);
9052 pending_break_support
= AUTO_BOOLEAN_AUTO
;
9054 add_setshow_boolean_cmd ("auto-hw", no_class
,
9055 &automatic_hardware_breakpoints
, _("\
9056 Set automatic usage of hardware breakpoints."), _("\
9057 Show automatic usage of hardware breakpoints."), _("\
9058 If set, the debugger will automatically use hardware breakpoints for\n\
9059 breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
9060 a warning will be emitted for such breakpoints."),
9062 show_automatic_hardware_breakpoints
,
9063 &breakpoint_set_cmdlist
,
9064 &breakpoint_show_cmdlist
);
9066 add_setshow_enum_cmd ("always-inserted", class_support
,
9067 always_inserted_enums
, &always_inserted_mode
, _("\
9068 Set mode for inserting breakpoints."), _("\
9069 Show mode for inserting breakpoints."), _("\
9070 When this mode is off, breakpoints are inserted in inferior when it is\n\
9071 resumed, and removed when execution stops. When this mode is on,\n\
9072 breakpoints are inserted immediately and removed only when the user\n\
9073 deletes the breakpoint. When this mode is auto (which is the default),\n\
9074 the behaviour depends on the non-stop setting (see help set non-stop).\n\
9075 In this case, if gdb is controlling the inferior in non-stop mode, gdb\n\
9076 behaves as if always-inserted mode is on; if gdb is controlling the\n\
9077 inferior in all-stop mode, gdb behaves as if always-inserted mode is off."),
9079 &show_always_inserted_mode
,
9080 &breakpoint_set_cmdlist
,
9081 &breakpoint_show_cmdlist
);
9083 automatic_hardware_breakpoints
= 1;
9085 observer_attach_about_to_proceed (breakpoint_about_to_proceed
);