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 if (!breakpoints_always_inserted_mode ()
1290 && (target_has_execution
1291 || gdbarch_has_global_breakpoints (target_gdbarch
)))
1292 /* update_global_location_list does not insert breakpoints
1293 when always_inserted_mode is not enabled. Explicitly
1295 insert_breakpoint_locations ();
1298 /* insert_breakpoints is used when starting or continuing the program.
1299 remove_breakpoints is used when the program stops.
1300 Both return zero if successful,
1301 or an `errno' value if could not write the inferior. */
1304 insert_breakpoint_locations (void)
1306 struct breakpoint
*bpt
;
1307 struct bp_location
*b
, *temp
;
1310 int disabled_breaks
= 0;
1311 int hw_breakpoint_error
= 0;
1313 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1314 struct cleanup
*cleanups
= make_cleanup_ui_file_delete (tmp_error_stream
);
1316 /* Explicitly mark the warning -- this will only be printed if
1317 there was an error. */
1318 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1320 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1322 if (!should_be_inserted (b
) || b
->inserted
)
1325 /* There is no point inserting thread-specific breakpoints if the
1326 thread no longer exists. */
1327 if (b
->owner
->thread
!= -1
1328 && !valid_thread_id (b
->owner
->thread
))
1331 val
= insert_bp_location (b
, tmp_error_stream
,
1333 &hw_breakpoint_error
);
1338 /* If we failed to insert all locations of a watchpoint,
1339 remove them, as half-inserted watchpoint is of limited use. */
1340 ALL_BREAKPOINTS (bpt
)
1342 int some_failed
= 0;
1343 struct bp_location
*loc
;
1345 if (!is_hardware_watchpoint (bpt
))
1348 if (!breakpoint_enabled (bpt
))
1351 if (bpt
->disposition
== disp_del_at_next_stop
)
1354 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
1362 for (loc
= bpt
->loc
; loc
; loc
= loc
->next
)
1364 remove_breakpoint (loc
, mark_uninserted
);
1366 hw_breakpoint_error
= 1;
1367 fprintf_unfiltered (tmp_error_stream
,
1368 "Could not insert hardware watchpoint %d.\n",
1376 /* If a hardware breakpoint or watchpoint was inserted, add a
1377 message about possibly exhausted resources. */
1378 if (hw_breakpoint_error
)
1380 fprintf_unfiltered (tmp_error_stream
,
1381 "Could not insert hardware breakpoints:\n\
1382 You may have requested too many hardware breakpoints/watchpoints.\n");
1384 target_terminal_ours_for_output ();
1385 error_stream (tmp_error_stream
);
1388 do_cleanups (cleanups
);
1392 remove_breakpoints (void)
1394 struct bp_location
*b
;
1397 ALL_BP_LOCATIONS (b
)
1401 val
= remove_breakpoint (b
, mark_uninserted
);
1410 remove_hw_watchpoints (void)
1412 struct bp_location
*b
;
1415 ALL_BP_LOCATIONS (b
)
1417 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1419 val
= remove_breakpoint (b
, mark_uninserted
);
1428 reattach_breakpoints (int pid
)
1430 struct bp_location
*b
;
1432 struct cleanup
*old_chain
= save_inferior_ptid ();
1433 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1434 int dummy1
= 0, dummy2
= 0;
1436 make_cleanup_ui_file_delete (tmp_error_stream
);
1438 inferior_ptid
= pid_to_ptid (pid
);
1439 ALL_BP_LOCATIONS (b
)
1444 val
= insert_bp_location (b
, tmp_error_stream
,
1448 do_cleanups (old_chain
);
1453 do_cleanups (old_chain
);
1457 static int internal_breakpoint_number
= -1;
1459 static struct breakpoint
*
1460 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
1462 struct symtab_and_line sal
;
1463 struct breakpoint
*b
;
1465 init_sal (&sal
); /* initialize to zeroes */
1468 sal
.section
= find_pc_overlay (sal
.pc
);
1470 b
= set_raw_breakpoint (sal
, type
);
1471 b
->number
= internal_breakpoint_number
--;
1472 b
->disposition
= disp_donttouch
;
1478 create_overlay_event_breakpoint (char *func_name
, struct objfile
*objfile
)
1480 struct breakpoint
*b
;
1481 struct minimal_symbol
*m
;
1483 if ((m
= lookup_minimal_symbol_text (func_name
, objfile
)) == NULL
)
1486 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
1488 b
->addr_string
= xstrdup (func_name
);
1490 if (overlay_debugging
== ovly_auto
)
1492 b
->enable_state
= bp_enabled
;
1493 overlay_events_enabled
= 1;
1497 b
->enable_state
= bp_disabled
;
1498 overlay_events_enabled
= 0;
1500 update_global_location_list (1);
1504 update_breakpoints_after_exec (void)
1506 struct breakpoint
*b
;
1507 struct breakpoint
*temp
;
1508 struct bp_location
*bploc
;
1509 struct objfile
*objfile
;
1511 /* We're about to delete breakpoints from GDB's lists. If the
1512 INSERTED flag is true, GDB will try to lift the breakpoints by
1513 writing the breakpoints' "shadow contents" back into memory. The
1514 "shadow contents" are NOT valid after an exec, so GDB should not
1515 do that. Instead, the target is responsible from marking
1516 breakpoints out as soon as it detects an exec. We don't do that
1517 here instead, because there may be other attempts to delete
1518 breakpoints after detecting an exec and before reaching here. */
1519 ALL_BP_LOCATIONS (bploc
)
1520 gdb_assert (!bploc
->inserted
);
1522 ALL_BREAKPOINTS_SAFE (b
, temp
)
1524 /* Solib breakpoints must be explicitly reset after an exec(). */
1525 if (b
->type
== bp_shlib_event
)
1527 delete_breakpoint (b
);
1531 /* Thread event breakpoints must be set anew after an exec(),
1532 as must overlay event breakpoints. */
1533 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1535 delete_breakpoint (b
);
1539 /* Step-resume breakpoints are meaningless after an exec(). */
1540 if (b
->type
== bp_step_resume
)
1542 delete_breakpoint (b
);
1546 /* Longjmp and longjmp-resume breakpoints are also meaningless
1548 if (b
->type
== bp_longjmp
|| b
->type
== bp_longjmp_resume
)
1550 delete_breakpoint (b
);
1554 if (b
->type
== bp_catchpoint
)
1556 /* For now, none of the bp_catchpoint breakpoints need to
1557 do anything at this point. In the future, if some of
1558 the catchpoints need to something, we will need to add
1559 a new method, and call this method from here. */
1563 /* bp_finish is a special case. The only way we ought to be able
1564 to see one of these when an exec() has happened, is if the user
1565 caught a vfork, and then said "finish". Ordinarily a finish just
1566 carries them to the call-site of the current callee, by setting
1567 a temporary bp there and resuming. But in this case, the finish
1568 will carry them entirely through the vfork & exec.
1570 We don't want to allow a bp_finish to remain inserted now. But
1571 we can't safely delete it, 'cause finish_command has a handle to
1572 the bp on a bpstat, and will later want to delete it. There's a
1573 chance (and I've seen it happen) that if we delete the bp_finish
1574 here, that its storage will get reused by the time finish_command
1575 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1576 We really must allow finish_command to delete a bp_finish.
1578 In the absense of a general solution for the "how do we know
1579 it's safe to delete something others may have handles to?"
1580 problem, what we'll do here is just uninsert the bp_finish, and
1581 let finish_command delete it.
1583 (We know the bp_finish is "doomed" in the sense that it's
1584 momentary, and will be deleted as soon as finish_command sees
1585 the inferior stopped. So it doesn't matter that the bp's
1586 address is probably bogus in the new a.out, unlike e.g., the
1587 solib breakpoints.) */
1589 if (b
->type
== bp_finish
)
1594 /* Without a symbolic address, we have little hope of the
1595 pre-exec() address meaning the same thing in the post-exec()
1597 if (b
->addr_string
== NULL
)
1599 delete_breakpoint (b
);
1603 /* FIXME what about longjmp breakpoints? Re-create them here? */
1604 ALL_OBJFILES (objfile
)
1605 create_overlay_event_breakpoint ("_ovly_debug_event", objfile
);
1609 detach_breakpoints (int pid
)
1611 struct bp_location
*b
;
1613 struct cleanup
*old_chain
= save_inferior_ptid ();
1615 if (pid
== PIDGET (inferior_ptid
))
1616 error (_("Cannot detach breakpoints of inferior_ptid"));
1618 /* Set inferior_ptid; remove_breakpoint uses this global. */
1619 inferior_ptid
= pid_to_ptid (pid
);
1620 ALL_BP_LOCATIONS (b
)
1624 val
= remove_breakpoint (b
, mark_inserted
);
1627 do_cleanups (old_chain
);
1632 do_cleanups (old_chain
);
1637 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1641 if (b
->owner
->enable_state
== bp_permanent
)
1642 /* Permanent breakpoints cannot be inserted or removed. */
1645 /* The type of none suggests that owner is actually deleted.
1646 This should not ever happen. */
1647 gdb_assert (b
->owner
->type
!= bp_none
);
1649 if (b
->loc_type
== bp_loc_software_breakpoint
1650 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1652 /* "Normal" instruction breakpoint: either the standard
1653 trap-instruction bp (bp_breakpoint), or a
1654 bp_hardware_breakpoint. */
1656 /* First check to see if we have to handle an overlay. */
1657 if (overlay_debugging
== ovly_off
1658 || b
->section
== NULL
1659 || !(section_is_overlay (b
->section
)))
1661 /* No overlay handling: just remove the breakpoint. */
1663 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1664 val
= target_remove_hw_breakpoint (&b
->target_info
);
1666 val
= target_remove_breakpoint (&b
->target_info
);
1670 /* This breakpoint is in an overlay section.
1671 Did we set a breakpoint at the LMA? */
1672 if (!overlay_events_enabled
)
1674 /* Yes -- overlay event support is not active, so we
1675 should have set a breakpoint at the LMA. Remove it.
1677 /* Ignore any failures: if the LMA is in ROM, we will
1678 have already warned when we failed to insert it. */
1679 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1680 target_remove_hw_breakpoint (&b
->overlay_target_info
);
1682 target_remove_breakpoint (&b
->overlay_target_info
);
1684 /* Did we set a breakpoint at the VMA?
1685 If so, we will have marked the breakpoint 'inserted'. */
1688 /* Yes -- remove it. Previously we did not bother to
1689 remove the breakpoint if the section had been
1690 unmapped, but let's not rely on that being safe. We
1691 don't know what the overlay manager might do. */
1692 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1693 val
= target_remove_hw_breakpoint (&b
->target_info
);
1695 /* However, we should remove *software* breakpoints only
1696 if the section is still mapped, or else we overwrite
1697 wrong code with the saved shadow contents. */
1698 else if (section_is_mapped (b
->section
))
1699 val
= target_remove_breakpoint (&b
->target_info
);
1705 /* No -- not inserted, so no need to remove. No error. */
1710 /* In some cases, we might not be able to remove a breakpoint
1711 in a shared library that has already been removed, but we
1712 have not yet processed the shlib unload event. */
1713 if (val
&& solib_name_from_address (b
->address
))
1718 b
->inserted
= (is
== mark_inserted
);
1720 else if (b
->loc_type
== bp_loc_hardware_watchpoint
)
1725 b
->inserted
= (is
== mark_inserted
);
1726 val
= target_remove_watchpoint (b
->address
, b
->length
,
1727 b
->watchpoint_type
);
1729 /* Failure to remove any of the hardware watchpoints comes here. */
1730 if ((is
== mark_uninserted
) && (b
->inserted
))
1731 warning (_("Could not remove hardware watchpoint %d."),
1734 else if (b
->owner
->type
== bp_catchpoint
1735 && breakpoint_enabled (b
->owner
)
1738 gdb_assert (b
->owner
->ops
!= NULL
&& b
->owner
->ops
->remove
!= NULL
);
1740 val
= b
->owner
->ops
->remove (b
->owner
);
1743 b
->inserted
= (is
== mark_inserted
);
1749 /* Clear the "inserted" flag in all breakpoints. */
1752 mark_breakpoints_out (void)
1754 struct bp_location
*bpt
;
1756 ALL_BP_LOCATIONS (bpt
)
1760 /* Clear the "inserted" flag in all breakpoints and delete any
1761 breakpoints which should go away between runs of the program.
1763 Plus other such housekeeping that has to be done for breakpoints
1766 Note: this function gets called at the end of a run (by
1767 generic_mourn_inferior) and when a run begins (by
1768 init_wait_for_inferior). */
1773 breakpoint_init_inferior (enum inf_context context
)
1775 struct breakpoint
*b
, *temp
;
1776 struct bp_location
*bpt
;
1779 /* If breakpoint locations are shared across processes, then there's
1781 if (gdbarch_has_global_breakpoints (target_gdbarch
))
1784 ALL_BP_LOCATIONS (bpt
)
1785 if (bpt
->owner
->enable_state
!= bp_permanent
)
1788 ALL_BREAKPOINTS_SAFE (b
, temp
)
1793 case bp_watchpoint_scope
:
1795 /* If the call dummy breakpoint is at the entry point it will
1796 cause problems when the inferior is rerun, so we better
1799 Also get rid of scope breakpoints. */
1800 delete_breakpoint (b
);
1804 case bp_hardware_watchpoint
:
1805 case bp_read_watchpoint
:
1806 case bp_access_watchpoint
:
1808 /* Likewise for watchpoints on local expressions. */
1809 if (b
->exp_valid_block
!= NULL
)
1810 delete_breakpoint (b
);
1811 else if (context
== inf_starting
)
1813 /* Reset val field to force reread of starting value
1814 in insert_breakpoints. */
1816 value_free (b
->val
);
1826 /* Get rid of the moribund locations. */
1827 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, bpt
); ++ix
)
1828 free_bp_location (bpt
);
1829 VEC_free (bp_location_p
, moribund_locations
);
1832 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1833 exists at PC. It returns ordinary_breakpoint_here if it's an
1834 ordinary breakpoint, or permanent_breakpoint_here if it's a
1835 permanent breakpoint.
1836 - When continuing from a location with an ordinary breakpoint, we
1837 actually single step once before calling insert_breakpoints.
1838 - When continuing from a localion with a permanent breakpoint, we
1839 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1840 the target, to advance the PC past the breakpoint. */
1842 enum breakpoint_here
1843 breakpoint_here_p (CORE_ADDR pc
)
1845 const struct bp_location
*bpt
;
1846 int any_breakpoint_here
= 0;
1848 ALL_BP_LOCATIONS (bpt
)
1850 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1851 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1854 if ((breakpoint_enabled (bpt
->owner
)
1855 || bpt
->owner
->enable_state
== bp_permanent
)
1856 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1858 if (overlay_debugging
1859 && section_is_overlay (bpt
->section
)
1860 && !section_is_mapped (bpt
->section
))
1861 continue; /* unmapped overlay -- can't be a match */
1862 else if (bpt
->owner
->enable_state
== bp_permanent
)
1863 return permanent_breakpoint_here
;
1865 any_breakpoint_here
= 1;
1869 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1872 /* Return true if there's a moribund breakpoint at PC. */
1875 moribund_breakpoint_here_p (CORE_ADDR pc
)
1877 struct bp_location
*loc
;
1880 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
1881 if (loc
->address
== pc
)
1887 /* Returns non-zero if there's a breakpoint inserted at PC, which is
1888 inserted using regular breakpoint_chain/bp_location_chain mechanism.
1889 This does not check for single-step breakpoints, which are
1890 inserted and removed using direct target manipulation. */
1893 regular_breakpoint_inserted_here_p (CORE_ADDR pc
)
1895 const struct bp_location
*bpt
;
1897 ALL_BP_LOCATIONS (bpt
)
1899 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1900 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1904 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1906 if (overlay_debugging
1907 && section_is_overlay (bpt
->section
)
1908 && !section_is_mapped (bpt
->section
))
1909 continue; /* unmapped overlay -- can't be a match */
1917 /* Returns non-zero iff there's either regular breakpoint
1918 or a single step breakpoint inserted at PC. */
1921 breakpoint_inserted_here_p (CORE_ADDR pc
)
1923 if (regular_breakpoint_inserted_here_p (pc
))
1926 if (single_step_breakpoint_inserted_here_p (pc
))
1932 /* This function returns non-zero iff there is a software breakpoint
1936 software_breakpoint_inserted_here_p (CORE_ADDR pc
)
1938 const struct bp_location
*bpt
;
1939 int any_breakpoint_here
= 0;
1941 ALL_BP_LOCATIONS (bpt
)
1943 if (bpt
->loc_type
!= bp_loc_software_breakpoint
)
1947 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1949 if (overlay_debugging
1950 && section_is_overlay (bpt
->section
)
1951 && !section_is_mapped (bpt
->section
))
1952 continue; /* unmapped overlay -- can't be a match */
1958 /* Also check for software single-step breakpoints. */
1959 if (single_step_breakpoint_inserted_here_p (pc
))
1965 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1966 PC is valid for process/thread PTID. */
1969 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1971 const struct bp_location
*bpt
;
1972 /* The thread and task IDs associated to PTID, computed lazily. */
1976 ALL_BP_LOCATIONS (bpt
)
1978 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1979 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1982 if (!breakpoint_enabled (bpt
->owner
)
1983 && bpt
->owner
->enable_state
!= bp_permanent
)
1986 if (bpt
->address
!= pc
)
1989 if (bpt
->owner
->thread
!= -1)
1991 /* This is a thread-specific breakpoint. Check that ptid
1992 matches that thread. If thread hasn't been computed yet,
1993 it is now time to do so. */
1995 thread
= pid_to_thread_id (ptid
);
1996 if (bpt
->owner
->thread
!= thread
)
2000 if (bpt
->owner
->task
!= 0)
2002 /* This is a task-specific breakpoint. Check that ptid
2003 matches that task. If task hasn't been computed yet,
2004 it is now time to do so. */
2006 task
= ada_get_task_number (ptid
);
2007 if (bpt
->owner
->task
!= task
)
2011 if (overlay_debugging
2012 && section_is_overlay (bpt
->section
)
2013 && !section_is_mapped (bpt
->section
))
2014 continue; /* unmapped overlay -- can't be a match */
2023 /* bpstat stuff. External routines' interfaces are documented
2027 ep_is_catchpoint (struct breakpoint
*ep
)
2029 return (ep
->type
== bp_catchpoint
);
2033 bpstat_free (bpstat bs
)
2035 if (bs
->old_val
!= NULL
)
2036 value_free (bs
->old_val
);
2037 free_command_lines (&bs
->commands
);
2041 /* Clear a bpstat so that it says we are not at any breakpoint.
2042 Also free any storage that is part of a bpstat. */
2045 bpstat_clear (bpstat
*bsp
)
2062 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
2063 is part of the bpstat is copied as well. */
2066 bpstat_copy (bpstat bs
)
2070 bpstat retval
= NULL
;
2075 for (; bs
!= NULL
; bs
= bs
->next
)
2077 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
2078 memcpy (tmp
, bs
, sizeof (*tmp
));
2079 if (bs
->commands
!= NULL
)
2080 tmp
->commands
= copy_command_lines (bs
->commands
);
2081 if (bs
->old_val
!= NULL
)
2083 tmp
->old_val
= value_copy (bs
->old_val
);
2084 release_value (tmp
->old_val
);
2088 /* This is the first thing in the chain. */
2098 /* Find the bpstat associated with this breakpoint */
2101 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
2106 for (; bsp
!= NULL
; bsp
= bsp
->next
)
2108 if (bsp
->breakpoint_at
&& bsp
->breakpoint_at
->owner
== breakpoint
)
2114 /* Find a step_resume breakpoint associated with this bpstat.
2115 (If there are multiple step_resume bp's on the list, this function
2116 will arbitrarily pick one.)
2118 It is an error to use this function if BPSTAT doesn't contain a
2119 step_resume breakpoint.
2121 See wait_for_inferior's use of this function. */
2123 bpstat_find_step_resume_breakpoint (bpstat bsp
)
2127 gdb_assert (bsp
!= NULL
);
2129 current_thread
= pid_to_thread_id (inferior_ptid
);
2131 for (; bsp
!= NULL
; bsp
= bsp
->next
)
2133 if ((bsp
->breakpoint_at
!= NULL
) &&
2134 (bsp
->breakpoint_at
->owner
->type
== bp_step_resume
) &&
2135 (bsp
->breakpoint_at
->owner
->thread
== current_thread
||
2136 bsp
->breakpoint_at
->owner
->thread
== -1))
2137 return bsp
->breakpoint_at
->owner
;
2140 internal_error (__FILE__
, __LINE__
, _("No step_resume breakpoint found."));
2144 /* Put in *NUM the breakpoint number of the first breakpoint we are stopped
2145 at. *BSP upon return is a bpstat which points to the remaining
2146 breakpoints stopped at (but which is not guaranteed to be good for
2147 anything but further calls to bpstat_num).
2148 Return 0 if passed a bpstat which does not indicate any breakpoints.
2149 Return -1 if stopped at a breakpoint that has been deleted since
2151 Return 1 otherwise. */
2154 bpstat_num (bpstat
*bsp
, int *num
)
2156 struct breakpoint
*b
;
2159 return 0; /* No more breakpoint values */
2161 /* We assume we'll never have several bpstats that
2162 correspond to a single breakpoint -- otherwise,
2163 this function might return the same number more
2164 than once and this will look ugly. */
2165 b
= (*bsp
)->breakpoint_at
? (*bsp
)->breakpoint_at
->owner
: NULL
;
2166 *bsp
= (*bsp
)->next
;
2168 return -1; /* breakpoint that's been deleted since */
2170 *num
= b
->number
; /* We have its number */
2174 /* Modify BS so that the actions will not be performed. */
2177 bpstat_clear_actions (bpstat bs
)
2179 for (; bs
!= NULL
; bs
= bs
->next
)
2181 free_command_lines (&bs
->commands
);
2182 if (bs
->old_val
!= NULL
)
2184 value_free (bs
->old_val
);
2190 /* Called when a command is about to proceed the inferior. */
2193 breakpoint_about_to_proceed (void)
2195 if (!ptid_equal (inferior_ptid
, null_ptid
))
2197 struct thread_info
*tp
= inferior_thread ();
2199 /* Allow inferior function calls in breakpoint commands to not
2200 interrupt the command list. When the call finishes
2201 successfully, the inferior will be standing at the same
2202 breakpoint as if nothing happened. */
2207 breakpoint_proceeded
= 1;
2210 /* Stub for cleaning up our state if we error-out of a breakpoint command */
2212 cleanup_executing_breakpoints (void *ignore
)
2214 executing_breakpoint_commands
= 0;
2217 /* Execute all the commands associated with all the breakpoints at this
2218 location. Any of these commands could cause the process to proceed
2219 beyond this point, etc. We look out for such changes by checking
2220 the global "breakpoint_proceeded" after each command.
2222 Returns true if a breakpoint command resumed the inferior. In that
2223 case, it is the caller's responsibility to recall it again with the
2224 bpstat of the current thread. */
2227 bpstat_do_actions_1 (bpstat
*bsp
)
2230 struct cleanup
*old_chain
;
2233 /* Avoid endless recursion if a `source' command is contained
2235 if (executing_breakpoint_commands
)
2238 executing_breakpoint_commands
= 1;
2239 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
2241 /* This pointer will iterate over the list of bpstat's. */
2244 breakpoint_proceeded
= 0;
2245 for (; bs
!= NULL
; bs
= bs
->next
)
2247 struct command_line
*cmd
;
2248 struct cleanup
*this_cmd_tree_chain
;
2250 /* Take ownership of the BSP's command tree, if it has one.
2252 The command tree could legitimately contain commands like
2253 'step' and 'next', which call clear_proceed_status, which
2254 frees stop_bpstat's command tree. To make sure this doesn't
2255 free the tree we're executing out from under us, we need to
2256 take ownership of the tree ourselves. Since a given bpstat's
2257 commands are only executed once, we don't need to copy it; we
2258 can clear the pointer in the bpstat, and make sure we free
2259 the tree when we're done. */
2262 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2266 execute_control_command (cmd
);
2268 if (breakpoint_proceeded
)
2274 /* We can free this command tree now. */
2275 do_cleanups (this_cmd_tree_chain
);
2277 if (breakpoint_proceeded
)
2279 if (target_can_async_p ())
2280 /* If we are in async mode, then the target might be still
2281 running, not stopped at any breakpoint, so nothing for
2282 us to do here -- just return to the event loop. */
2285 /* In sync mode, when execute_control_command returns
2286 we're already standing on the next breakpoint.
2287 Breakpoint commands for that stop were not run, since
2288 execute_command does not run breakpoint commands --
2289 only command_line_handler does, but that one is not
2290 involved in execution of breakpoint commands. So, we
2291 can now execute breakpoint commands. It should be
2292 noted that making execute_command do bpstat actions is
2293 not an option -- in this case we'll have recursive
2294 invocation of bpstat for each breakpoint with a
2295 command, and can easily blow up GDB stack. Instead, we
2296 return true, which will trigger the caller to recall us
2297 with the new stop_bpstat. */
2302 do_cleanups (old_chain
);
2307 bpstat_do_actions (void)
2309 /* Do any commands attached to breakpoint we are stopped at. */
2310 while (!ptid_equal (inferior_ptid
, null_ptid
)
2311 && target_has_execution
2312 && !is_exited (inferior_ptid
)
2313 && !is_executing (inferior_ptid
))
2314 /* Since in sync mode, bpstat_do_actions may resume the inferior,
2315 and only return when it is stopped at the next breakpoint, we
2316 keep doing breakpoint actions until it returns false to
2317 indicate the inferior was not resumed. */
2318 if (!bpstat_do_actions_1 (&inferior_thread ()->stop_bpstat
))
2322 /* Print out the (old or new) value associated with a watchpoint. */
2325 watchpoint_value_print (struct value
*val
, struct ui_file
*stream
)
2328 fprintf_unfiltered (stream
, _("<unreadable>"));
2331 struct value_print_options opts
;
2332 get_user_print_options (&opts
);
2333 value_print (val
, stream
, &opts
);
2337 /* This is the normal print function for a bpstat. In the future,
2338 much of this logic could (should?) be moved to bpstat_stop_status,
2339 by having it set different print_it values.
2341 Current scheme: When we stop, bpstat_print() is called. It loops
2342 through the bpstat list of things causing this stop, calling the
2343 print_bp_stop_message function on each one. The behavior of the
2344 print_bp_stop_message function depends on the print_it field of
2345 bpstat. If such field so indicates, call this function here.
2347 Return values from this routine (ultimately used by bpstat_print()
2348 and normal_stop() to decide what to do):
2349 PRINT_NOTHING: Means we already printed all we needed to print,
2350 don't print anything else.
2351 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2352 that something to be followed by a location.
2353 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2354 that something to be followed by a location.
2355 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2358 static enum print_stop_action
2359 print_it_typical (bpstat bs
)
2361 struct cleanup
*old_chain
;
2362 struct breakpoint
*b
;
2363 const struct bp_location
*bl
;
2364 struct ui_stream
*stb
;
2366 enum print_stop_action result
;
2368 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2369 which has since been deleted. */
2370 if (bs
->breakpoint_at
== NULL
)
2371 return PRINT_UNKNOWN
;
2372 bl
= bs
->breakpoint_at
;
2375 stb
= ui_out_stream_new (uiout
);
2376 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2381 case bp_hardware_breakpoint
:
2382 bp_temp
= bs
->breakpoint_at
->owner
->disposition
== disp_del
;
2383 if (bl
->address
!= bl
->requested_address
)
2384 breakpoint_adjustment_warning (bl
->requested_address
,
2387 annotate_breakpoint (b
->number
);
2389 ui_out_text (uiout
, "\nTemporary breakpoint ");
2391 ui_out_text (uiout
, "\nBreakpoint ");
2392 if (ui_out_is_mi_like_p (uiout
))
2394 ui_out_field_string (uiout
, "reason",
2395 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
2396 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
2398 ui_out_field_int (uiout
, "bkptno", b
->number
);
2399 ui_out_text (uiout
, ", ");
2400 result
= PRINT_SRC_AND_LOC
;
2403 case bp_shlib_event
:
2404 /* Did we stop because the user set the stop_on_solib_events
2405 variable? (If so, we report this as a generic, "Stopped due
2406 to shlib event" message.) */
2407 printf_filtered (_("Stopped due to shared library event\n"));
2408 result
= PRINT_NOTHING
;
2411 case bp_thread_event
:
2412 /* Not sure how we will get here.
2413 GDB should not stop for these breakpoints. */
2414 printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n"));
2415 result
= PRINT_NOTHING
;
2418 case bp_overlay_event
:
2419 /* By analogy with the thread event, GDB should not stop for these. */
2420 printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n"));
2421 result
= PRINT_NOTHING
;
2425 case bp_hardware_watchpoint
:
2426 annotate_watchpoint (b
->number
);
2427 if (ui_out_is_mi_like_p (uiout
))
2430 async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER
));
2432 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2433 ui_out_text (uiout
, "\nOld value = ");
2434 watchpoint_value_print (bs
->old_val
, stb
->stream
);
2435 ui_out_field_stream (uiout
, "old", stb
);
2436 ui_out_text (uiout
, "\nNew value = ");
2437 watchpoint_value_print (b
->val
, stb
->stream
);
2438 ui_out_field_stream (uiout
, "new", stb
);
2439 ui_out_text (uiout
, "\n");
2440 /* More than one watchpoint may have been triggered. */
2441 result
= PRINT_UNKNOWN
;
2444 case bp_read_watchpoint
:
2445 if (ui_out_is_mi_like_p (uiout
))
2448 async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER
));
2450 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2451 ui_out_text (uiout
, "\nValue = ");
2452 watchpoint_value_print (b
->val
, stb
->stream
);
2453 ui_out_field_stream (uiout
, "value", stb
);
2454 ui_out_text (uiout
, "\n");
2455 result
= PRINT_UNKNOWN
;
2458 case bp_access_watchpoint
:
2459 if (bs
->old_val
!= NULL
)
2461 annotate_watchpoint (b
->number
);
2462 if (ui_out_is_mi_like_p (uiout
))
2465 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2467 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2468 ui_out_text (uiout
, "\nOld value = ");
2469 watchpoint_value_print (bs
->old_val
, stb
->stream
);
2470 ui_out_field_stream (uiout
, "old", stb
);
2471 ui_out_text (uiout
, "\nNew value = ");
2476 if (ui_out_is_mi_like_p (uiout
))
2479 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2480 make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2481 ui_out_text (uiout
, "\nValue = ");
2483 watchpoint_value_print (b
->val
, stb
->stream
);
2484 ui_out_field_stream (uiout
, "new", stb
);
2485 ui_out_text (uiout
, "\n");
2486 result
= PRINT_UNKNOWN
;
2489 /* Fall through, we don't deal with these types of breakpoints
2493 if (ui_out_is_mi_like_p (uiout
))
2496 async_reason_lookup (EXEC_ASYNC_FUNCTION_FINISHED
));
2497 result
= PRINT_UNKNOWN
;
2501 if (ui_out_is_mi_like_p (uiout
))
2504 async_reason_lookup (EXEC_ASYNC_LOCATION_REACHED
));
2505 result
= PRINT_UNKNOWN
;
2510 case bp_longjmp_resume
:
2511 case bp_step_resume
:
2512 case bp_watchpoint_scope
:
2516 result
= PRINT_UNKNOWN
;
2520 do_cleanups (old_chain
);
2524 /* Generic routine for printing messages indicating why we
2525 stopped. The behavior of this function depends on the value
2526 'print_it' in the bpstat structure. Under some circumstances we
2527 may decide not to print anything here and delegate the task to
2530 static enum print_stop_action
2531 print_bp_stop_message (bpstat bs
)
2533 switch (bs
->print_it
)
2536 /* Nothing should be printed for this bpstat entry. */
2537 return PRINT_UNKNOWN
;
2541 /* We still want to print the frame, but we already printed the
2542 relevant messages. */
2543 return PRINT_SRC_AND_LOC
;
2546 case print_it_normal
:
2548 const struct bp_location
*bl
= bs
->breakpoint_at
;
2549 struct breakpoint
*b
= bl
? bl
->owner
: NULL
;
2551 /* Normal case. Call the breakpoint's print_it method, or
2552 print_it_typical. */
2553 /* FIXME: how breakpoint can ever be NULL here? */
2554 if (b
!= NULL
&& b
->ops
!= NULL
&& b
->ops
->print_it
!= NULL
)
2555 return b
->ops
->print_it (b
);
2557 return print_it_typical (bs
);
2562 internal_error (__FILE__
, __LINE__
,
2563 _("print_bp_stop_message: unrecognized enum value"));
2568 /* Print a message indicating what happened. This is called from
2569 normal_stop(). The input to this routine is the head of the bpstat
2570 list - a list of the eventpoints that caused this stop. This
2571 routine calls the generic print routine for printing a message
2572 about reasons for stopping. This will print (for example) the
2573 "Breakpoint n," part of the output. The return value of this
2576 PRINT_UNKNOWN: Means we printed nothing
2577 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2578 code to print the location. An example is
2579 "Breakpoint 1, " which should be followed by
2581 PRINT_SRC_ONLY: Means we printed something, but there is no need
2582 to also print the location part of the message.
2583 An example is the catch/throw messages, which
2584 don't require a location appended to the end.
2585 PRINT_NOTHING: We have done some printing and we don't need any
2586 further info to be printed.*/
2588 enum print_stop_action
2589 bpstat_print (bpstat bs
)
2593 /* Maybe another breakpoint in the chain caused us to stop.
2594 (Currently all watchpoints go on the bpstat whether hit or not.
2595 That probably could (should) be changed, provided care is taken
2596 with respect to bpstat_explains_signal). */
2597 for (; bs
; bs
= bs
->next
)
2599 val
= print_bp_stop_message (bs
);
2600 if (val
== PRINT_SRC_ONLY
2601 || val
== PRINT_SRC_AND_LOC
2602 || val
== PRINT_NOTHING
)
2606 /* We reached the end of the chain, or we got a null BS to start
2607 with and nothing was printed. */
2608 return PRINT_UNKNOWN
;
2611 /* Evaluate the expression EXP and return 1 if value is zero.
2612 This is used inside a catch_errors to evaluate the breakpoint condition.
2613 The argument is a "struct expression *" that has been cast to char * to
2614 make it pass through catch_errors. */
2617 breakpoint_cond_eval (void *exp
)
2619 struct value
*mark
= value_mark ();
2620 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2621 value_free_to_mark (mark
);
2625 /* Allocate a new bpstat and chain it to the current one. */
2628 bpstat_alloc (const struct bp_location
*bl
, bpstat cbs
/* Current "bs" value */ )
2632 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2634 bs
->breakpoint_at
= bl
;
2635 /* If the condition is false, etc., don't do the commands. */
2636 bs
->commands
= NULL
;
2638 bs
->print_it
= print_it_normal
;
2642 /* The target has stopped with waitstatus WS. Check if any hardware
2643 watchpoints have triggered, according to the target. */
2646 watchpoints_triggered (struct target_waitstatus
*ws
)
2648 int stopped_by_watchpoint
= target_stopped_by_watchpoint ();
2650 struct breakpoint
*b
;
2652 if (!stopped_by_watchpoint
)
2654 /* We were not stopped by a watchpoint. Mark all watchpoints
2655 as not triggered. */
2657 if (b
->type
== bp_hardware_watchpoint
2658 || b
->type
== bp_read_watchpoint
2659 || b
->type
== bp_access_watchpoint
)
2660 b
->watchpoint_triggered
= watch_triggered_no
;
2665 if (!target_stopped_data_address (¤t_target
, &addr
))
2667 /* We were stopped by a watchpoint, but we don't know where.
2668 Mark all watchpoints as unknown. */
2670 if (b
->type
== bp_hardware_watchpoint
2671 || b
->type
== bp_read_watchpoint
2672 || b
->type
== bp_access_watchpoint
)
2673 b
->watchpoint_triggered
= watch_triggered_unknown
;
2675 return stopped_by_watchpoint
;
2678 /* The target could report the data address. Mark watchpoints
2679 affected by this data address as triggered, and all others as not
2683 if (b
->type
== bp_hardware_watchpoint
2684 || b
->type
== bp_read_watchpoint
2685 || b
->type
== bp_access_watchpoint
)
2687 struct bp_location
*loc
;
2690 b
->watchpoint_triggered
= watch_triggered_no
;
2691 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
2692 /* Exact match not required. Within range is
2694 if (target_watchpoint_addr_within_range (¤t_target
,
2698 b
->watchpoint_triggered
= watch_triggered_yes
;
2706 /* Possible return values for watchpoint_check (this can't be an enum
2707 because of check_errors). */
2708 /* The watchpoint has been deleted. */
2709 #define WP_DELETED 1
2710 /* The value has changed. */
2711 #define WP_VALUE_CHANGED 2
2712 /* The value has not changed. */
2713 #define WP_VALUE_NOT_CHANGED 3
2715 #define BP_TEMPFLAG 1
2716 #define BP_HARDWAREFLAG 2
2718 /* Check watchpoint condition. */
2721 watchpoint_check (void *p
)
2723 bpstat bs
= (bpstat
) p
;
2724 struct breakpoint
*b
;
2725 struct frame_info
*fr
;
2726 int within_current_scope
;
2728 b
= bs
->breakpoint_at
->owner
;
2730 if (b
->exp_valid_block
== NULL
)
2731 within_current_scope
= 1;
2734 /* There is no current frame at this moment. If we're going to have
2735 any chance of handling watchpoints on local variables, we'll need
2736 the frame chain (so we can determine if we're in scope). */
2737 reinit_frame_cache ();
2738 fr
= frame_find_by_id (b
->watchpoint_frame
);
2739 within_current_scope
= (fr
!= NULL
);
2741 /* If we've gotten confused in the unwinder, we might have
2742 returned a frame that can't describe this variable. */
2743 if (within_current_scope
2744 && (block_linkage_function (b
->exp_valid_block
)
2745 != get_frame_function (fr
)))
2746 within_current_scope
= 0;
2748 /* in_function_epilogue_p() returns a non-zero value if we're still
2749 in the function but the stack frame has already been invalidated.
2750 Since we can't rely on the values of local variables after the
2751 stack has been destroyed, we are treating the watchpoint in that
2752 state as `not changed' without further checking.
2754 vinschen/2003-09-04: The former implementation left out the case
2755 that the watchpoint frame couldn't be found by frame_find_by_id()
2756 because the current PC is currently in an epilogue. Calling
2757 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2758 if (!within_current_scope
|| fr
== get_current_frame ())
2760 struct frame_info
*frame
= get_current_frame ();
2761 struct gdbarch
*frame_arch
= get_frame_arch (frame
);
2762 CORE_ADDR frame_pc
= get_frame_pc (frame
);
2764 if (gdbarch_in_function_epilogue_p (frame_arch
, frame_pc
))
2765 return WP_VALUE_NOT_CHANGED
;
2767 if (fr
&& within_current_scope
)
2768 /* If we end up stopping, the current frame will get selected
2769 in normal_stop. So this call to select_frame won't affect
2774 if (within_current_scope
)
2776 /* We use value_{,free_to_}mark because it could be a
2777 *long* time before we return to the command level and
2778 call free_all_values. We can't call free_all_values because
2779 we might be in the middle of evaluating a function call. */
2781 struct value
*mark
= value_mark ();
2782 struct value
*new_val
;
2784 fetch_watchpoint_value (b
->exp
, &new_val
, NULL
, NULL
);
2785 if ((b
->val
!= NULL
) != (new_val
!= NULL
)
2786 || (b
->val
!= NULL
&& !value_equal (b
->val
, new_val
)))
2788 if (new_val
!= NULL
)
2790 release_value (new_val
);
2791 value_free_to_mark (mark
);
2793 bs
->old_val
= b
->val
;
2796 /* We will stop here */
2797 return WP_VALUE_CHANGED
;
2801 /* Nothing changed, don't do anything. */
2802 value_free_to_mark (mark
);
2803 /* We won't stop here */
2804 return WP_VALUE_NOT_CHANGED
;
2809 /* This seems like the only logical thing to do because
2810 if we temporarily ignored the watchpoint, then when
2811 we reenter the block in which it is valid it contains
2812 garbage (in the case of a function, it may have two
2813 garbage values, one before and one after the prologue).
2814 So we can't even detect the first assignment to it and
2815 watch after that (since the garbage may or may not equal
2816 the first value assigned). */
2817 /* We print all the stop information in print_it_typical(), but
2818 in this case, by the time we call print_it_typical() this bp
2819 will be deleted already. So we have no choice but print the
2820 information here. */
2821 if (ui_out_is_mi_like_p (uiout
))
2823 (uiout
, "reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_SCOPE
));
2824 ui_out_text (uiout
, "\nWatchpoint ");
2825 ui_out_field_int (uiout
, "wpnum", b
->number
);
2826 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2827 which its expression is valid.\n");
2829 if (b
->related_breakpoint
)
2830 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2831 b
->disposition
= disp_del_at_next_stop
;
2837 /* Return true if it looks like target has stopped due to hitting
2838 breakpoint location BL. This function does not check if we
2839 should stop, only if BL explains the stop. */
2841 bpstat_check_location (const struct bp_location
*bl
, CORE_ADDR bp_addr
)
2843 struct breakpoint
*b
= bl
->owner
;
2845 if (b
->type
!= bp_watchpoint
2846 && b
->type
!= bp_hardware_watchpoint
2847 && b
->type
!= bp_read_watchpoint
2848 && b
->type
!= bp_access_watchpoint
2849 && b
->type
!= bp_hardware_breakpoint
2850 && b
->type
!= bp_catchpoint
) /* a non-watchpoint bp */
2852 if (bl
->address
!= bp_addr
) /* address doesn't match */
2854 if (overlay_debugging
/* unmapped overlay section */
2855 && section_is_overlay (bl
->section
)
2856 && !section_is_mapped (bl
->section
))
2860 /* Continuable hardware watchpoints are treated as non-existent if the
2861 reason we stopped wasn't a hardware watchpoint (we didn't stop on
2862 some data address). Otherwise gdb won't stop on a break instruction
2863 in the code (not from a breakpoint) when a hardware watchpoint has
2864 been defined. Also skip watchpoints which we know did not trigger
2865 (did not match the data address). */
2867 if ((b
->type
== bp_hardware_watchpoint
2868 || b
->type
== bp_read_watchpoint
2869 || b
->type
== bp_access_watchpoint
)
2870 && b
->watchpoint_triggered
== watch_triggered_no
)
2873 if (b
->type
== bp_hardware_breakpoint
)
2875 if (bl
->address
!= bp_addr
)
2877 if (overlay_debugging
/* unmapped overlay section */
2878 && section_is_overlay (bl
->section
)
2879 && !section_is_mapped (bl
->section
))
2883 if (b
->type
== bp_catchpoint
)
2885 gdb_assert (b
->ops
!= NULL
&& b
->ops
->breakpoint_hit
!= NULL
);
2886 if (!b
->ops
->breakpoint_hit (b
))
2893 /* If BS refers to a watchpoint, determine if the watched values
2894 has actually changed, and we should stop. If not, set BS->stop
2897 bpstat_check_watchpoint (bpstat bs
)
2899 const struct bp_location
*bl
= bs
->breakpoint_at
;
2900 struct breakpoint
*b
= bl
->owner
;
2902 if (b
->type
== bp_watchpoint
2903 || b
->type
== bp_read_watchpoint
2904 || b
->type
== bp_access_watchpoint
2905 || b
->type
== bp_hardware_watchpoint
)
2909 int must_check_value
= 0;
2911 if (b
->type
== bp_watchpoint
)
2912 /* For a software watchpoint, we must always check the
2914 must_check_value
= 1;
2915 else if (b
->watchpoint_triggered
== watch_triggered_yes
)
2916 /* We have a hardware watchpoint (read, write, or access)
2917 and the target earlier reported an address watched by
2919 must_check_value
= 1;
2920 else if (b
->watchpoint_triggered
== watch_triggered_unknown
2921 && b
->type
== bp_hardware_watchpoint
)
2922 /* We were stopped by a hardware watchpoint, but the target could
2923 not report the data address. We must check the watchpoint's
2924 value. Access and read watchpoints are out of luck; without
2925 a data address, we can't figure it out. */
2926 must_check_value
= 1;
2928 if (must_check_value
)
2930 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2932 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2933 int e
= catch_errors (watchpoint_check
, bs
, message
,
2935 do_cleanups (cleanups
);
2939 /* We've already printed what needs to be printed. */
2940 bs
->print_it
= print_it_done
;
2943 case WP_VALUE_CHANGED
:
2944 if (b
->type
== bp_read_watchpoint
)
2946 /* Don't stop: read watchpoints shouldn't fire if
2947 the value has changed. This is for targets
2948 which cannot set read-only watchpoints. */
2949 bs
->print_it
= print_it_noop
;
2953 case WP_VALUE_NOT_CHANGED
:
2954 if (b
->type
== bp_hardware_watchpoint
2955 || b
->type
== bp_watchpoint
)
2957 /* Don't stop: write watchpoints shouldn't fire if
2958 the value hasn't changed. */
2959 bs
->print_it
= print_it_noop
;
2967 /* Error from catch_errors. */
2968 printf_filtered (_("Watchpoint %d deleted.\n"), b
->number
);
2969 if (b
->related_breakpoint
)
2970 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2971 b
->disposition
= disp_del_at_next_stop
;
2972 /* We've already printed what needs to be printed. */
2973 bs
->print_it
= print_it_done
;
2977 else /* must_check_value == 0 */
2979 /* This is a case where some watchpoint(s) triggered, but
2980 not at the address of this watchpoint, or else no
2981 watchpoint triggered after all. So don't print
2982 anything for this watchpoint. */
2983 bs
->print_it
= print_it_noop
;
2990 /* Check conditions (condition proper, frame, thread and ignore count)
2991 of breakpoint referred to by BS. If we should not stop for this
2992 breakpoint, set BS->stop to 0. */
2994 bpstat_check_breakpoint_conditions (bpstat bs
, ptid_t ptid
)
2996 int thread_id
= pid_to_thread_id (ptid
);
2997 const struct bp_location
*bl
= bs
->breakpoint_at
;
2998 struct breakpoint
*b
= bl
->owner
;
3000 if (frame_id_p (b
->frame_id
)
3001 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
3005 int value_is_zero
= 0;
3007 /* If this is a scope breakpoint, mark the associated
3008 watchpoint as triggered so that we will handle the
3009 out-of-scope event. We'll get to the watchpoint next
3011 if (b
->type
== bp_watchpoint_scope
)
3012 b
->related_breakpoint
->watchpoint_triggered
= watch_triggered_yes
;
3014 if (bl
->cond
&& bl
->owner
->disposition
!= disp_del_at_next_stop
)
3016 /* We use value_mark and value_free_to_mark because it could
3017 be a long time before we return to the command level and
3018 call free_all_values. We can't call free_all_values
3019 because we might be in the middle of evaluating a
3021 struct value
*mark
= value_mark ();
3023 /* Need to select the frame, with all that implies
3024 so that the conditions will have the right context. */
3025 select_frame (get_current_frame ());
3027 = catch_errors (breakpoint_cond_eval
, (bl
->cond
),
3028 "Error in testing breakpoint condition:\n",
3030 /* FIXME-someday, should give breakpoint # */
3031 value_free_to_mark (mark
);
3033 if (bl
->cond
&& value_is_zero
)
3037 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
3041 else if (b
->ignore_count
> 0)
3044 annotate_ignore_count_change ();
3046 /* Increase the hit count even though we don't
3054 /* Get a bpstat associated with having just stopped at address
3055 BP_ADDR in thread PTID.
3057 Determine whether we stopped at a breakpoint, etc, or whether we
3058 don't understand this stop. Result is a chain of bpstat's such that:
3060 if we don't understand the stop, the result is a null pointer.
3062 if we understand why we stopped, the result is not null.
3064 Each element of the chain refers to a particular breakpoint or
3065 watchpoint at which we have stopped. (We may have stopped for
3066 several reasons concurrently.)
3068 Each element of the chain has valid next, breakpoint_at,
3069 commands, FIXME??? fields. */
3072 bpstat_stop_status (CORE_ADDR bp_addr
, ptid_t ptid
)
3074 struct breakpoint
*b
= NULL
;
3075 const struct bp_location
*bl
;
3076 struct bp_location
*loc
;
3077 /* Root of the chain of bpstat's */
3078 struct bpstats root_bs
[1];
3079 /* Pointer to the last thing in the chain currently. */
3080 bpstat bs
= root_bs
;
3082 int need_remove_insert
;
3084 ALL_BP_LOCATIONS (bl
)
3088 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
3091 /* For hardware watchpoints, we look only at the first location.
3092 The watchpoint_check function will work on entire expression,
3093 not the individual locations. For read watchopints, the
3094 watchpoints_triggered function have checked all locations
3097 if (b
->type
== bp_hardware_watchpoint
&& bl
!= b
->loc
)
3100 if (!bpstat_check_location (bl
, bp_addr
))
3103 /* Come here if it's a watchpoint, or if the break address matches */
3105 bs
= bpstat_alloc (bl
, bs
); /* Alloc a bpstat to explain stop */
3107 /* Assume we stop. Should we find watchpoint that is not actually
3108 triggered, or if condition of breakpoint is false, we'll reset
3113 bpstat_check_watchpoint (bs
);
3117 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
3118 /* We do not stop for these. */
3121 bpstat_check_breakpoint_conditions (bs
, ptid
);
3127 /* We will stop here */
3128 if (b
->disposition
== disp_disable
)
3130 if (b
->enable_state
!= bp_permanent
)
3131 b
->enable_state
= bp_disabled
;
3132 update_global_location_list (0);
3136 bs
->commands
= b
->commands
;
3138 (strcmp ("silent", bs
->commands
->line
) == 0
3139 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
3141 bs
->commands
= bs
->commands
->next
;
3144 bs
->commands
= copy_command_lines (bs
->commands
);
3147 /* Print nothing for this entry if we dont stop or if we dont print. */
3148 if (bs
->stop
== 0 || bs
->print
== 0)
3149 bs
->print_it
= print_it_noop
;
3152 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
3154 if (loc
->address
== bp_addr
)
3156 bs
= bpstat_alloc (loc
, bs
);
3157 /* For hits of moribund locations, we should just proceed. */
3160 bs
->print_it
= print_it_noop
;
3164 bs
->next
= NULL
; /* Terminate the chain */
3165 bs
= root_bs
->next
; /* Re-grab the head of the chain */
3167 /* If we aren't stopping, the value of some hardware watchpoint may
3168 not have changed, but the intermediate memory locations we are
3169 watching may have. Don't bother if we're stopping; this will get
3171 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3175 need_remove_insert
= 0;
3177 for (bs
= root_bs
->next
; bs
!= NULL
; bs
= bs
->next
)
3179 && bs
->breakpoint_at
->owner
3180 && (bs
->breakpoint_at
->owner
->type
== bp_hardware_watchpoint
3181 || bs
->breakpoint_at
->owner
->type
== bp_read_watchpoint
3182 || bs
->breakpoint_at
->owner
->type
== bp_access_watchpoint
))
3184 /* remove/insert can invalidate bs->breakpoint_at, if this
3185 location is no longer used by the watchpoint. Prevent
3186 further code from trying to use it. */
3187 bs
->breakpoint_at
= NULL
;
3188 need_remove_insert
= 1;
3191 if (need_remove_insert
)
3193 remove_breakpoints ();
3194 insert_breakpoints ();
3197 return root_bs
->next
;
3200 /* Tell what to do about this bpstat. */
3202 bpstat_what (bpstat bs
)
3204 /* Classify each bpstat as one of the following. */
3207 /* This bpstat element has no effect on the main_action. */
3210 /* There was a watchpoint, stop but don't print. */
3213 /* There was a watchpoint, stop and print. */
3216 /* There was a breakpoint but we're not stopping. */
3219 /* There was a breakpoint, stop but don't print. */
3222 /* There was a breakpoint, stop and print. */
3225 /* We hit the longjmp breakpoint. */
3228 /* We hit the longjmp_resume breakpoint. */
3231 /* We hit the step_resume breakpoint. */
3234 /* We hit the shared library event breakpoint. */
3237 /* This is just used to count how many enums there are. */
3241 /* Here is the table which drives this routine. So that we can
3242 format it pretty, we define some abbreviations for the
3243 enum bpstat_what codes. */
3244 #define kc BPSTAT_WHAT_KEEP_CHECKING
3245 #define ss BPSTAT_WHAT_STOP_SILENT
3246 #define sn BPSTAT_WHAT_STOP_NOISY
3247 #define sgl BPSTAT_WHAT_SINGLE
3248 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
3249 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
3250 #define sr BPSTAT_WHAT_STEP_RESUME
3251 #define shl BPSTAT_WHAT_CHECK_SHLIBS
3253 /* "Can't happen." Might want to print an error message.
3254 abort() is not out of the question, but chances are GDB is just
3255 a bit confused, not unusable. */
3256 #define err BPSTAT_WHAT_STOP_NOISY
3258 /* Given an old action and a class, come up with a new action. */
3259 /* One interesting property of this table is that wp_silent is the same
3260 as bp_silent and wp_noisy is the same as bp_noisy. That is because
3261 after stopping, the check for whether to step over a breakpoint
3262 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
3263 reference to how we stopped. We retain separate wp_silent and
3264 bp_silent codes in case we want to change that someday.
3266 Another possibly interesting property of this table is that
3267 there's a partial ordering, priority-like, of the actions. Once
3268 you've decided that some action is appropriate, you'll never go
3269 back and decide something of a lower priority is better. The
3272 kc < clr sgl shl slr sn sr ss
3273 sgl < shl slr sn sr ss
3274 slr < err shl sn sr ss
3275 clr < err shl sn sr ss
3281 What I think this means is that we don't need a damned table
3282 here. If you just put the rows and columns in the right order,
3283 it'd look awfully regular. We could simply walk the bpstat list
3284 and choose the highest priority action we find, with a little
3285 logic to handle the 'err' cases. */
3287 /* step_resume entries: a step resume breakpoint overrides another
3288 breakpoint of signal handling (see comment in wait_for_inferior
3289 at where we set the step_resume breakpoint). */
3291 static const enum bpstat_what_main_action
3292 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3295 /* kc ss sn sgl slr clr sr shl
3298 {kc
, ss
, sn
, sgl
, slr
, clr
, sr
, shl
},
3300 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
},
3302 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
},
3304 {sgl
, ss
, sn
, sgl
, slr
, slr
, sr
, shl
},
3306 {ss
, ss
, sn
, ss
, ss
, ss
, sr
, shl
},
3308 {sn
, sn
, sn
, sn
, sn
, sn
, sr
, shl
},
3310 {slr
, ss
, sn
, slr
, slr
, err
, sr
, shl
},
3312 {clr
, ss
, sn
, err
, err
, err
, sr
, shl
},
3314 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
},
3316 {shl
, shl
, shl
, shl
, shl
, shl
, sr
, shl
}
3329 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3330 struct bpstat_what retval
;
3332 retval
.call_dummy
= 0;
3333 for (; bs
!= NULL
; bs
= bs
->next
)
3335 enum class bs_class
= no_effect
;
3336 if (bs
->breakpoint_at
== NULL
)
3337 /* I suspect this can happen if it was a momentary breakpoint
3338 which has since been deleted. */
3340 if (bs
->breakpoint_at
->owner
== NULL
)
3341 bs_class
= bp_nostop
;
3343 switch (bs
->breakpoint_at
->owner
->type
)
3349 case bp_hardware_breakpoint
:
3355 bs_class
= bp_noisy
;
3357 bs_class
= bp_silent
;
3360 bs_class
= bp_nostop
;
3363 case bp_hardware_watchpoint
:
3364 case bp_read_watchpoint
:
3365 case bp_access_watchpoint
:
3369 bs_class
= wp_noisy
;
3371 bs_class
= wp_silent
;
3374 /* There was a watchpoint, but we're not stopping.
3375 This requires no further action. */
3376 bs_class
= no_effect
;
3379 bs_class
= long_jump
;
3381 case bp_longjmp_resume
:
3382 bs_class
= long_resume
;
3384 case bp_step_resume
:
3387 bs_class
= step_resume
;
3390 /* It is for the wrong frame. */
3391 bs_class
= bp_nostop
;
3393 case bp_watchpoint_scope
:
3394 bs_class
= bp_nostop
;
3396 case bp_shlib_event
:
3397 bs_class
= shlib_event
;
3399 case bp_thread_event
:
3400 case bp_overlay_event
:
3401 bs_class
= bp_nostop
;
3407 bs_class
= bp_noisy
;
3409 bs_class
= bp_silent
;
3412 /* There was a catchpoint, but we're not stopping.
3413 This requires no further action. */
3414 bs_class
= no_effect
;
3417 /* Make sure the action is stop (silent or noisy),
3418 so infrun.c pops the dummy frame. */
3419 bs_class
= bp_silent
;
3420 retval
.call_dummy
= 1;
3423 /* Tracepoint hits should not be reported back to GDB, and
3424 if one got through somehow, it should have been filtered
3426 internal_error (__FILE__
, __LINE__
,
3427 _("bpstat_what: bp_tracepoint encountered"));
3430 current_action
= table
[(int) bs_class
][(int) current_action
];
3432 retval
.main_action
= current_action
;
3436 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3437 without hardware support). This isn't related to a specific bpstat,
3438 just to things like whether watchpoints are set. */
3441 bpstat_should_step (void)
3443 struct breakpoint
*b
;
3445 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
&& b
->loc
!= NULL
)
3452 static void print_breakpoint_location (struct breakpoint
*b
,
3453 struct bp_location
*loc
,
3455 struct ui_stream
*stb
)
3460 = find_pc_sect_function (loc
->address
, loc
->section
);
3463 ui_out_text (uiout
, "in ");
3464 ui_out_field_string (uiout
, "func",
3465 SYMBOL_PRINT_NAME (sym
));
3466 ui_out_wrap_hint (uiout
, wrap_indent
);
3467 ui_out_text (uiout
, " at ");
3469 ui_out_field_string (uiout
, "file", b
->source_file
);
3470 ui_out_text (uiout
, ":");
3472 if (ui_out_is_mi_like_p (uiout
))
3474 struct symtab_and_line sal
= find_pc_line (loc
->address
, 0);
3475 char *fullname
= symtab_to_fullname (sal
.symtab
);
3478 ui_out_field_string (uiout
, "fullname", fullname
);
3481 ui_out_field_int (uiout
, "line", b
->line_number
);
3485 ui_out_field_string (uiout
, "pending", b
->addr_string
);
3489 print_address_symbolic (loc
->address
, stb
->stream
, demangle
, "");
3490 ui_out_field_stream (uiout
, "at", stb
);
3494 /* Print B to gdb_stdout. */
3496 print_one_breakpoint_location (struct breakpoint
*b
,
3497 struct bp_location
*loc
,
3499 CORE_ADDR
*last_addr
)
3501 struct command_line
*l
;
3503 struct ep_type_description
3508 static struct ep_type_description bptypes
[] =
3510 {bp_none
, "?deleted?"},
3511 {bp_breakpoint
, "breakpoint"},
3512 {bp_hardware_breakpoint
, "hw breakpoint"},
3513 {bp_until
, "until"},
3514 {bp_finish
, "finish"},
3515 {bp_watchpoint
, "watchpoint"},
3516 {bp_hardware_watchpoint
, "hw watchpoint"},
3517 {bp_read_watchpoint
, "read watchpoint"},
3518 {bp_access_watchpoint
, "acc watchpoint"},
3519 {bp_longjmp
, "longjmp"},
3520 {bp_longjmp_resume
, "longjmp resume"},
3521 {bp_step_resume
, "step resume"},
3522 {bp_watchpoint_scope
, "watchpoint scope"},
3523 {bp_call_dummy
, "call dummy"},
3524 {bp_shlib_event
, "shlib events"},
3525 {bp_thread_event
, "thread events"},
3526 {bp_overlay_event
, "overlay events"},
3527 {bp_catchpoint
, "catchpoint"},
3528 {bp_tracepoint
, "tracepoint"},
3531 static char bpenables
[] = "nynny";
3532 char wrap_indent
[80];
3533 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3534 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3535 struct cleanup
*bkpt_chain
;
3537 int header_of_multiple
= 0;
3538 int part_of_multiple
= (loc
!= NULL
);
3539 struct value_print_options opts
;
3541 get_user_print_options (&opts
);
3543 gdb_assert (!loc
|| loc_number
!= 0);
3544 /* See comment in print_one_breakpoint concerning
3545 treatment of breakpoints with single disabled
3549 && (b
->loc
->next
!= NULL
|| !b
->loc
->enabled
)))
3550 header_of_multiple
= 1;
3555 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3559 if (part_of_multiple
)
3562 formatted
= xstrprintf ("%d.%d", b
->number
, loc_number
);
3563 ui_out_field_string (uiout
, "number", formatted
);
3568 ui_out_field_int (uiout
, "number", b
->number
);
3573 if (part_of_multiple
)
3574 ui_out_field_skip (uiout
, "type");
3577 if (((int) b
->type
>= (sizeof (bptypes
) / sizeof (bptypes
[0])))
3578 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3579 internal_error (__FILE__
, __LINE__
,
3580 _("bptypes table does not describe type #%d."),
3582 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3587 if (part_of_multiple
)
3588 ui_out_field_skip (uiout
, "disp");
3590 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
3595 if (part_of_multiple
)
3596 ui_out_field_string (uiout
, "enabled", loc
->enabled
? "y" : "n");
3598 ui_out_field_fmt (uiout
, "enabled", "%c",
3599 bpenables
[(int) b
->enable_state
]);
3600 ui_out_spaces (uiout
, 2);
3604 strcpy (wrap_indent
, " ");
3605 if (opts
.addressprint
)
3607 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3608 strcat (wrap_indent
, " ");
3610 strcat (wrap_indent
, " ");
3613 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3615 /* Although the print_one can possibly print
3616 all locations, calling it here is not likely
3617 to get any nice result. So, make sure there's
3618 just one location. */
3619 gdb_assert (b
->loc
== NULL
|| b
->loc
->next
== NULL
);
3620 b
->ops
->print_one (b
, last_addr
);
3626 internal_error (__FILE__
, __LINE__
,
3627 _("print_one_breakpoint: bp_none encountered\n"));
3631 case bp_hardware_watchpoint
:
3632 case bp_read_watchpoint
:
3633 case bp_access_watchpoint
:
3634 /* Field 4, the address, is omitted (which makes the columns
3635 not line up too nicely with the headers, but the effect
3636 is relatively readable). */
3637 if (opts
.addressprint
)
3638 ui_out_field_skip (uiout
, "addr");
3640 ui_out_field_string (uiout
, "what", b
->exp_string
);
3644 case bp_hardware_breakpoint
:
3648 case bp_longjmp_resume
:
3649 case bp_step_resume
:
3650 case bp_watchpoint_scope
:
3652 case bp_shlib_event
:
3653 case bp_thread_event
:
3654 case bp_overlay_event
:
3656 if (opts
.addressprint
)
3659 if (header_of_multiple
)
3660 ui_out_field_string (uiout
, "addr", "<MULTIPLE>");
3661 else if (b
->loc
== NULL
|| loc
->shlib_disabled
)
3662 ui_out_field_string (uiout
, "addr", "<PENDING>");
3664 ui_out_field_core_addr (uiout
, "addr", loc
->address
);
3667 if (!header_of_multiple
)
3668 print_breakpoint_location (b
, loc
, wrap_indent
, stb
);
3670 *last_addr
= b
->loc
->address
;
3674 if (!part_of_multiple
)
3676 if (b
->thread
!= -1)
3678 /* FIXME: This seems to be redundant and lost here; see the
3679 "stop only in" line a little further down. */
3680 ui_out_text (uiout
, " thread ");
3681 ui_out_field_int (uiout
, "thread", b
->thread
);
3683 else if (b
->task
!= 0)
3685 ui_out_text (uiout
, " task ");
3686 ui_out_field_int (uiout
, "task", b
->task
);
3690 ui_out_text (uiout
, "\n");
3692 if (part_of_multiple
&& frame_id_p (b
->frame_id
))
3695 ui_out_text (uiout
, "\tstop only in stack frame at ");
3696 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3698 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3699 ui_out_text (uiout
, "\n");
3702 if (!part_of_multiple
&& b
->cond_string
&& !ada_exception_catchpoint_p (b
))
3704 /* We do not print the condition for Ada exception catchpoints
3705 because the condition is an internal implementation detail
3706 that we do not want to expose to the user. */
3708 if (b
->type
== bp_tracepoint
)
3709 ui_out_text (uiout
, "\ttrace only if ");
3711 ui_out_text (uiout
, "\tstop only if ");
3712 ui_out_field_string (uiout
, "cond", b
->cond_string
);
3713 ui_out_text (uiout
, "\n");
3716 if (!part_of_multiple
&& b
->thread
!= -1)
3718 /* FIXME should make an annotation for this */
3719 ui_out_text (uiout
, "\tstop only in thread ");
3720 ui_out_field_int (uiout
, "thread", b
->thread
);
3721 ui_out_text (uiout
, "\n");
3724 if (!part_of_multiple
&& b
->hit_count
)
3726 /* FIXME should make an annotation for this */
3727 if (ep_is_catchpoint (b
))
3728 ui_out_text (uiout
, "\tcatchpoint");
3730 ui_out_text (uiout
, "\tbreakpoint");
3731 ui_out_text (uiout
, " already hit ");
3732 ui_out_field_int (uiout
, "times", b
->hit_count
);
3733 if (b
->hit_count
== 1)
3734 ui_out_text (uiout
, " time\n");
3736 ui_out_text (uiout
, " times\n");
3739 /* Output the count also if it is zero, but only if this is
3740 mi. FIXME: Should have a better test for this. */
3741 if (ui_out_is_mi_like_p (uiout
))
3742 if (!part_of_multiple
&& b
->hit_count
== 0)
3743 ui_out_field_int (uiout
, "times", b
->hit_count
);
3745 if (!part_of_multiple
&& b
->ignore_count
)
3748 ui_out_text (uiout
, "\tignore next ");
3749 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3750 ui_out_text (uiout
, " hits\n");
3753 if (!part_of_multiple
&& (l
= b
->commands
))
3755 struct cleanup
*script_chain
;
3758 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3759 print_command_lines (uiout
, l
, 4);
3760 do_cleanups (script_chain
);
3763 if (!part_of_multiple
&& b
->pass_count
)
3765 annotate_field (10);
3766 ui_out_text (uiout
, "\tpass count ");
3767 ui_out_field_int (uiout
, "pass", b
->pass_count
);
3768 ui_out_text (uiout
, " \n");
3771 if (!part_of_multiple
&& b
->step_count
)
3773 annotate_field (11);
3774 ui_out_text (uiout
, "\tstep count ");
3775 ui_out_field_int (uiout
, "step", b
->step_count
);
3776 ui_out_text (uiout
, " \n");
3779 if (!part_of_multiple
&& b
->actions
)
3781 struct action_line
*action
;
3782 annotate_field (12);
3783 for (action
= b
->actions
; action
; action
= action
->next
)
3785 ui_out_text (uiout
, " A\t");
3786 ui_out_text (uiout
, action
->action
);
3787 ui_out_text (uiout
, "\n");
3791 if (ui_out_is_mi_like_p (uiout
) && !part_of_multiple
)
3794 ui_out_field_string (uiout
, "original-location", b
->addr_string
);
3795 else if (b
->exp_string
)
3796 ui_out_field_string (uiout
, "original-location", b
->exp_string
);
3799 do_cleanups (bkpt_chain
);
3800 do_cleanups (old_chain
);
3804 print_one_breakpoint (struct breakpoint
*b
,
3805 CORE_ADDR
*last_addr
)
3807 print_one_breakpoint_location (b
, NULL
, 0, last_addr
);
3809 /* If this breakpoint has custom print function,
3810 it's already printed. Otherwise, print individual
3811 locations, if any. */
3812 if (b
->ops
== NULL
|| b
->ops
->print_one
== NULL
)
3814 /* If breakpoint has a single location that is
3815 disabled, we print it as if it had
3816 several locations, since otherwise it's hard to
3817 represent "breakpoint enabled, location disabled"
3819 Note that while hardware watchpoints have
3820 several locations internally, that's no a property
3823 && !is_hardware_watchpoint (b
)
3824 && (b
->loc
->next
|| !b
->loc
->enabled
)
3825 && !ui_out_is_mi_like_p (uiout
))
3827 struct bp_location
*loc
;
3829 for (loc
= b
->loc
; loc
; loc
= loc
->next
, ++n
)
3830 print_one_breakpoint_location (b
, loc
, n
, last_addr
);
3836 struct captured_breakpoint_query_args
3842 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3844 struct captured_breakpoint_query_args
*args
= data
;
3845 struct breakpoint
*b
;
3846 CORE_ADDR dummy_addr
= 0;
3849 if (args
->bnum
== b
->number
)
3851 print_one_breakpoint (b
, &dummy_addr
);
3859 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
, char **error_message
)
3861 struct captured_breakpoint_query_args args
;
3863 /* For the moment we don't trust print_one_breakpoint() to not throw
3865 if (catch_exceptions_with_msg (uiout
, do_captured_breakpoint_query
, &args
,
3866 error_message
, RETURN_MASK_ALL
) < 0)
3872 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3873 catchpoints, et.al.). */
3876 user_settable_breakpoint (const struct breakpoint
*b
)
3878 return (b
->type
== bp_breakpoint
3879 || b
->type
== bp_catchpoint
3880 || b
->type
== bp_hardware_breakpoint
3881 || b
->type
== bp_tracepoint
3882 || b
->type
== bp_watchpoint
3883 || b
->type
== bp_read_watchpoint
3884 || b
->type
== bp_access_watchpoint
3885 || b
->type
== bp_hardware_watchpoint
);
3888 /* Print information on user settable breakpoint (watchpoint, etc)
3889 number BNUM. If BNUM is -1 print all user settable breakpoints.
3890 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3893 breakpoint_1 (int bnum
, int allflag
)
3895 struct breakpoint
*b
;
3896 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3897 int nr_printable_breakpoints
;
3898 struct cleanup
*bkpttbl_chain
;
3899 struct value_print_options opts
;
3901 get_user_print_options (&opts
);
3903 /* Compute the number of rows in the table. */
3904 nr_printable_breakpoints
= 0;
3907 || bnum
== b
->number
)
3909 if (allflag
|| user_settable_breakpoint (b
))
3910 nr_printable_breakpoints
++;
3913 if (opts
.addressprint
)
3915 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3919 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3922 if (nr_printable_breakpoints
> 0)
3923 annotate_breakpoints_headers ();
3924 if (nr_printable_breakpoints
> 0)
3926 ui_out_table_header (uiout
, 7, ui_left
, "number", "Num"); /* 1 */
3927 if (nr_printable_breakpoints
> 0)
3929 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3930 if (nr_printable_breakpoints
> 0)
3932 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3933 if (nr_printable_breakpoints
> 0)
3935 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3936 if (opts
.addressprint
)
3938 if (nr_printable_breakpoints
> 0)
3940 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3941 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3943 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3945 if (nr_printable_breakpoints
> 0)
3947 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3948 ui_out_table_body (uiout
);
3949 if (nr_printable_breakpoints
> 0)
3950 annotate_breakpoints_table ();
3954 || bnum
== b
->number
)
3956 /* We only print out user settable breakpoints unless the
3958 if (allflag
|| user_settable_breakpoint (b
))
3959 print_one_breakpoint (b
, &last_addr
);
3962 do_cleanups (bkpttbl_chain
);
3964 if (nr_printable_breakpoints
== 0)
3967 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3969 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3974 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3975 that a comparison of an unsigned with -1 is always false. */
3976 if (last_addr
!= (CORE_ADDR
) -1 && !server_command
)
3977 set_next_address (current_gdbarch
, last_addr
);
3980 /* FIXME? Should this be moved up so that it is only called when
3981 there have been breakpoints? */
3982 annotate_breakpoints_table_end ();
3986 breakpoints_info (char *bnum_exp
, int from_tty
)
3991 bnum
= parse_and_eval_long (bnum_exp
);
3993 breakpoint_1 (bnum
, 0);
3997 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
4002 bnum
= parse_and_eval_long (bnum_exp
);
4004 breakpoint_1 (bnum
, 1);
4008 breakpoint_has_pc (struct breakpoint
*b
,
4009 CORE_ADDR pc
, struct obj_section
*section
)
4011 struct bp_location
*bl
= b
->loc
;
4012 for (; bl
; bl
= bl
->next
)
4014 if (bl
->address
== pc
4015 && (!overlay_debugging
|| bl
->section
== section
))
4021 /* Print a message describing any breakpoints set at PC. */
4024 describe_other_breakpoints (CORE_ADDR pc
, struct obj_section
*section
,
4028 struct breakpoint
*b
;
4031 others
+= breakpoint_has_pc (b
, pc
, section
);
4035 printf_filtered (_("Note: breakpoint "));
4036 else /* if (others == ???) */
4037 printf_filtered (_("Note: breakpoints "));
4039 if (breakpoint_has_pc (b
, pc
, section
))
4042 printf_filtered ("%d", b
->number
);
4043 if (b
->thread
== -1 && thread
!= -1)
4044 printf_filtered (" (all threads)");
4045 else if (b
->thread
!= -1)
4046 printf_filtered (" (thread %d)", b
->thread
);
4047 printf_filtered ("%s%s ",
4048 ((b
->enable_state
== bp_disabled
||
4049 b
->enable_state
== bp_call_disabled
)
4051 : b
->enable_state
== bp_permanent
4055 : ((others
== 1) ? " and" : ""));
4057 printf_filtered (_("also set at pc "));
4058 fputs_filtered (paddress (pc
), gdb_stdout
);
4059 printf_filtered (".\n");
4063 /* Set the default place to put a breakpoint
4064 for the `break' command with no arguments. */
4067 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
4070 default_breakpoint_valid
= valid
;
4071 default_breakpoint_address
= addr
;
4072 default_breakpoint_symtab
= symtab
;
4073 default_breakpoint_line
= line
;
4076 /* Return true iff it is meaningful to use the address member of
4077 BPT. For some breakpoint types, the address member is irrelevant
4078 and it makes no sense to attempt to compare it to other addresses
4079 (or use it for any other purpose either).
4081 More specifically, each of the following breakpoint types will always
4082 have a zero valued address and we don't want check_duplicates() to mark
4083 breakpoints of any of these types to be a duplicate of an actual
4084 breakpoint at address zero:
4087 bp_hardware_watchpoint
4089 bp_access_watchpoint
4093 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
4095 enum bptype type
= bpt
->type
;
4097 return (type
!= bp_watchpoint
4098 && type
!= bp_hardware_watchpoint
4099 && type
!= bp_read_watchpoint
4100 && type
!= bp_access_watchpoint
4101 && type
!= bp_catchpoint
);
4104 /* Rescan breakpoints at the same address and section as BPT,
4105 marking the first one as "first" and any others as "duplicates".
4106 This is so that the bpt instruction is only inserted once.
4107 If we have a permanent breakpoint at the same place as BPT, make
4108 that one the official one, and the rest as duplicates. */
4111 check_duplicates_for (CORE_ADDR address
, struct obj_section
*section
)
4113 struct bp_location
*b
;
4115 struct bp_location
*perm_bp
= 0;
4117 ALL_BP_LOCATIONS (b
)
4118 if (b
->owner
->enable_state
!= bp_disabled
4119 && b
->owner
->enable_state
!= bp_call_disabled
4121 && !b
->shlib_disabled
4122 && b
->address
== address
/* address / overlay match */
4123 && (!overlay_debugging
|| b
->section
== section
)
4124 && breakpoint_address_is_meaningful (b
->owner
))
4126 /* Have we found a permanent breakpoint? */
4127 if (b
->owner
->enable_state
== bp_permanent
)
4134 b
->duplicate
= count
> 1;
4137 /* If we found a permanent breakpoint at this address, go over the
4138 list again and declare all the other breakpoints there (except
4139 other permanent breakpoints) to be the duplicates. */
4142 perm_bp
->duplicate
= 0;
4144 /* Permanent breakpoint should always be inserted. */
4145 if (! perm_bp
->inserted
)
4146 internal_error (__FILE__
, __LINE__
,
4147 _("allegedly permanent breakpoint is not "
4148 "actually inserted"));
4150 ALL_BP_LOCATIONS (b
)
4153 if (b
->owner
->enable_state
!= bp_permanent
4154 && b
->owner
->enable_state
!= bp_disabled
4155 && b
->owner
->enable_state
!= bp_call_disabled
4156 && b
->enabled
&& !b
->shlib_disabled
4157 && b
->address
== address
/* address / overlay match */
4158 && (!overlay_debugging
|| b
->section
== section
)
4159 && breakpoint_address_is_meaningful (b
->owner
))
4162 internal_error (__FILE__
, __LINE__
,
4163 _("another breakpoint was inserted on top of "
4164 "a permanent breakpoint"));
4173 check_duplicates (struct breakpoint
*bpt
)
4175 struct bp_location
*bl
= bpt
->loc
;
4177 if (! breakpoint_address_is_meaningful (bpt
))
4180 for (; bl
; bl
= bl
->next
)
4181 check_duplicates_for (bl
->address
, bl
->section
);
4185 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
4186 int bnum
, int have_bnum
)
4191 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
4192 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
4194 warning (_("Breakpoint %d address previously adjusted from %s to %s."),
4195 bnum
, astr1
, astr2
);
4197 warning (_("Breakpoint address adjusted from %s to %s."), astr1
, astr2
);
4200 /* Adjust a breakpoint's address to account for architectural constraints
4201 on breakpoint placement. Return the adjusted address. Note: Very
4202 few targets require this kind of adjustment. For most targets,
4203 this function is simply the identity function. */
4206 adjust_breakpoint_address (CORE_ADDR bpaddr
, enum bptype bptype
)
4208 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
4210 /* Very few targets need any kind of breakpoint adjustment. */
4213 else if (bptype
== bp_watchpoint
4214 || bptype
== bp_hardware_watchpoint
4215 || bptype
== bp_read_watchpoint
4216 || bptype
== bp_access_watchpoint
4217 || bptype
== bp_catchpoint
)
4219 /* Watchpoints and the various bp_catch_* eventpoints should not
4220 have their addresses modified. */
4225 CORE_ADDR adjusted_bpaddr
;
4227 /* Some targets have architectural constraints on the placement
4228 of breakpoint instructions. Obtain the adjusted address. */
4229 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
4232 /* An adjusted breakpoint address can significantly alter
4233 a user's expectations. Print a warning if an adjustment
4235 if (adjusted_bpaddr
!= bpaddr
)
4236 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
4238 return adjusted_bpaddr
;
4242 /* Allocate a struct bp_location. */
4244 static struct bp_location
*
4245 allocate_bp_location (struct breakpoint
*bpt
)
4247 struct bp_location
*loc
, *loc_p
;
4249 loc
= xmalloc (sizeof (struct bp_location
));
4250 memset (loc
, 0, sizeof (*loc
));
4254 loc
->shlib_disabled
= 0;
4264 case bp_longjmp_resume
:
4265 case bp_step_resume
:
4266 case bp_watchpoint_scope
:
4268 case bp_shlib_event
:
4269 case bp_thread_event
:
4270 case bp_overlay_event
:
4271 loc
->loc_type
= bp_loc_software_breakpoint
;
4273 case bp_hardware_breakpoint
:
4274 loc
->loc_type
= bp_loc_hardware_breakpoint
;
4276 case bp_hardware_watchpoint
:
4277 case bp_read_watchpoint
:
4278 case bp_access_watchpoint
:
4279 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4283 loc
->loc_type
= bp_loc_other
;
4286 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
4292 static void free_bp_location (struct bp_location
*loc
)
4297 if (loc
->function_name
)
4298 xfree (loc
->function_name
);
4303 /* Helper to set_raw_breakpoint below. Creates a breakpoint
4304 that has type BPTYPE and has no locations as yet. */
4306 static struct breakpoint
*
4307 set_raw_breakpoint_without_location (enum bptype bptype
)
4309 struct breakpoint
*b
, *b1
;
4311 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4312 memset (b
, 0, sizeof (*b
));
4315 b
->language
= current_language
->la_language
;
4316 b
->input_radix
= input_radix
;
4318 b
->enable_state
= bp_enabled
;
4321 b
->ignore_count
= 0;
4323 b
->frame_id
= null_frame_id
;
4324 b
->forked_inferior_pid
= null_ptid
;
4325 b
->exec_pathname
= NULL
;
4327 b
->condition_not_parsed
= 0;
4329 /* Add this breakpoint to the end of the chain
4330 so that a list of breakpoints will come out in order
4331 of increasing numbers. */
4333 b1
= breakpoint_chain
;
4335 breakpoint_chain
= b
;
4345 /* Initialize loc->function_name. */
4347 set_breakpoint_location_function (struct bp_location
*loc
)
4349 if (loc
->owner
->type
== bp_breakpoint
4350 || loc
->owner
->type
== bp_hardware_breakpoint
4351 || loc
->owner
->type
== bp_tracepoint
)
4353 find_pc_partial_function (loc
->address
, &(loc
->function_name
),
4355 if (loc
->function_name
)
4356 loc
->function_name
= xstrdup (loc
->function_name
);
4360 /* set_raw_breakpoint is a low level routine for allocating and
4361 partially initializing a breakpoint of type BPTYPE. The newly
4362 created breakpoint's address, section, source file name, and line
4363 number are provided by SAL. The newly created and partially
4364 initialized breakpoint is added to the breakpoint chain and
4365 is also returned as the value of this function.
4367 It is expected that the caller will complete the initialization of
4368 the newly created breakpoint struct as well as output any status
4369 information regarding the creation of a new breakpoint. In
4370 particular, set_raw_breakpoint does NOT set the breakpoint
4371 number! Care should be taken to not allow an error to occur
4372 prior to completing the initialization of the breakpoint. If this
4373 should happen, a bogus breakpoint will be left on the chain. */
4376 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4378 struct breakpoint
*b
= set_raw_breakpoint_without_location (bptype
);
4379 CORE_ADDR adjusted_address
;
4381 /* Adjust the breakpoint's address prior to allocating a location.
4382 Once we call allocate_bp_location(), that mostly uninitialized
4383 location will be placed on the location chain. Adjustment of the
4384 breakpoint may cause target_read_memory() to be called and we do
4385 not want its scan of the location chain to find a breakpoint and
4386 location that's only been partially initialized. */
4387 adjusted_address
= adjust_breakpoint_address (sal
.pc
, b
->type
);
4389 b
->loc
= allocate_bp_location (b
);
4390 b
->loc
->requested_address
= sal
.pc
;
4391 b
->loc
->address
= adjusted_address
;
4393 if (sal
.symtab
== NULL
)
4394 b
->source_file
= NULL
;
4396 b
->source_file
= xstrdup (sal
.symtab
->filename
);
4397 b
->loc
->section
= sal
.section
;
4398 b
->line_number
= sal
.line
;
4400 set_breakpoint_location_function (b
->loc
);
4402 breakpoints_changed ();
4408 /* Note that the breakpoint object B describes a permanent breakpoint
4409 instruction, hard-wired into the inferior's code. */
4411 make_breakpoint_permanent (struct breakpoint
*b
)
4413 struct bp_location
*bl
;
4414 b
->enable_state
= bp_permanent
;
4416 /* By definition, permanent breakpoints are already present in the code.
4417 Mark all locations as inserted. For now, make_breakpoint_permanent
4418 is called in just one place, so it's hard to say if it's reasonable
4419 to have permanent breakpoint with multiple locations or not,
4420 but it's easy to implmement. */
4421 for (bl
= b
->loc
; bl
; bl
= bl
->next
)
4426 create_longjmp_breakpoint (char *func_name
)
4428 struct minimal_symbol
*m
;
4430 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4432 set_momentary_breakpoint_at_pc (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4433 update_global_location_list (1);
4436 /* Call this routine when stepping and nexting to enable a breakpoint
4437 if we do a longjmp(). When we hit that breakpoint, call
4438 set_longjmp_resume_breakpoint() to figure out where we are going. */
4441 set_longjmp_breakpoint (void)
4443 if (gdbarch_get_longjmp_target_p (current_gdbarch
))
4445 create_longjmp_breakpoint ("longjmp");
4446 create_longjmp_breakpoint ("_longjmp");
4447 create_longjmp_breakpoint ("siglongjmp");
4448 create_longjmp_breakpoint ("_siglongjmp");
4452 /* Delete all longjmp breakpoints from THREAD. */
4454 delete_longjmp_breakpoint (int thread
)
4456 struct breakpoint
*b
, *temp
;
4458 ALL_BREAKPOINTS_SAFE (b
, temp
)
4459 if (b
->type
== bp_longjmp
)
4461 if (b
->thread
== thread
)
4462 delete_breakpoint (b
);
4467 enable_overlay_breakpoints (void)
4469 struct breakpoint
*b
;
4472 if (b
->type
== bp_overlay_event
)
4474 b
->enable_state
= bp_enabled
;
4475 update_global_location_list (1);
4476 overlay_events_enabled
= 1;
4481 disable_overlay_breakpoints (void)
4483 struct breakpoint
*b
;
4486 if (b
->type
== bp_overlay_event
)
4488 b
->enable_state
= bp_disabled
;
4489 update_global_location_list (0);
4490 overlay_events_enabled
= 0;
4495 create_thread_event_breakpoint (CORE_ADDR address
)
4497 struct breakpoint
*b
;
4499 b
= create_internal_breakpoint (address
, bp_thread_event
);
4501 b
->enable_state
= bp_enabled
;
4502 /* addr_string has to be used or breakpoint_re_set will delete me. */
4503 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4505 update_global_location_list_nothrow (1);
4511 remove_thread_event_breakpoints (void)
4513 struct breakpoint
*b
, *temp
;
4515 ALL_BREAKPOINTS_SAFE (b
, temp
)
4516 if (b
->type
== bp_thread_event
)
4517 delete_breakpoint (b
);
4520 struct captured_parse_breakpoint_args
4523 struct symtabs_and_lines
*sals_p
;
4524 char ***addr_string_p
;
4528 struct lang_and_radix
4536 remove_solib_event_breakpoints (void)
4538 struct breakpoint
*b
, *temp
;
4540 ALL_BREAKPOINTS_SAFE (b
, temp
)
4541 if (b
->type
== bp_shlib_event
)
4542 delete_breakpoint (b
);
4546 create_solib_event_breakpoint (CORE_ADDR address
)
4548 struct breakpoint
*b
;
4550 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4551 update_global_location_list_nothrow (1);
4555 /* Disable any breakpoints that are on code in shared libraries. Only
4556 apply to enabled breakpoints, disabled ones can just stay disabled. */
4559 disable_breakpoints_in_shlibs (void)
4561 struct bp_location
*loc
;
4563 ALL_BP_LOCATIONS (loc
)
4565 struct breakpoint
*b
= loc
->owner
;
4566 /* We apply the check to all breakpoints, including disabled
4567 for those with loc->duplicate set. This is so that when breakpoint
4568 becomes enabled, or the duplicate is removed, gdb will try to insert
4569 all breakpoints. If we don't set shlib_disabled here, we'll try
4570 to insert those breakpoints and fail. */
4571 if (((b
->type
== bp_breakpoint
)
4572 || (b
->type
== bp_hardware_breakpoint
)
4573 || (b
->type
== bp_tracepoint
))
4574 && !loc
->shlib_disabled
4576 && PC_SOLIB (loc
->address
)
4578 && solib_name_from_address (loc
->address
)
4582 loc
->shlib_disabled
= 1;
4587 /* Disable any breakpoints that are in in an unloaded shared library. Only
4588 apply to enabled breakpoints, disabled ones can just stay disabled. */
4591 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
4593 struct bp_location
*loc
;
4594 int disabled_shlib_breaks
= 0;
4596 /* SunOS a.out shared libraries are always mapped, so do not
4597 disable breakpoints; they will only be reported as unloaded
4598 through clear_solib when GDB discards its shared library
4599 list. See clear_solib for more information. */
4600 if (exec_bfd
!= NULL
4601 && bfd_get_flavour (exec_bfd
) == bfd_target_aout_flavour
)
4604 ALL_BP_LOCATIONS (loc
)
4606 struct breakpoint
*b
= loc
->owner
;
4607 if ((loc
->loc_type
== bp_loc_hardware_breakpoint
4608 || loc
->loc_type
== bp_loc_software_breakpoint
)
4609 && !loc
->shlib_disabled
4610 && (b
->type
== bp_breakpoint
|| b
->type
== bp_hardware_breakpoint
)
4611 && solib_contains_address_p (solib
, loc
->address
))
4613 loc
->shlib_disabled
= 1;
4614 /* At this point, we cannot rely on remove_breakpoint
4615 succeeding so we must mark the breakpoint as not inserted
4616 to prevent future errors occurring in remove_breakpoints. */
4618 if (!disabled_shlib_breaks
)
4620 target_terminal_ours_for_output ();
4621 warning (_("Temporarily disabling breakpoints for unloaded shared library \"%s\""),
4624 disabled_shlib_breaks
= 1;
4629 /* FORK & VFORK catchpoints. */
4631 /* Implement the "insert" breakpoint_ops method for fork catchpoints. */
4634 insert_catch_fork (struct breakpoint
*b
)
4636 target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
4639 /* Implement the "remove" breakpoint_ops method for fork catchpoints. */
4642 remove_catch_fork (struct breakpoint
*b
)
4644 return target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
4647 /* Implement the "breakpoint_hit" breakpoint_ops method for fork
4651 breakpoint_hit_catch_fork (struct breakpoint
*b
)
4653 return inferior_has_forked (inferior_ptid
, &b
->forked_inferior_pid
);
4656 /* Implement the "print_it" breakpoint_ops method for fork catchpoints. */
4658 static enum print_stop_action
4659 print_it_catch_fork (struct breakpoint
*b
)
4661 annotate_catchpoint (b
->number
);
4662 printf_filtered (_("\nCatchpoint %d (forked process %d), "),
4663 b
->number
, ptid_get_pid (b
->forked_inferior_pid
));
4664 return PRINT_SRC_AND_LOC
;
4667 /* Implement the "print_one" breakpoint_ops method for fork catchpoints. */
4670 print_one_catch_fork (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
4672 struct value_print_options opts
;
4674 get_user_print_options (&opts
);
4676 /* Field 4, the address, is omitted (which makes the columns
4677 not line up too nicely with the headers, but the effect
4678 is relatively readable). */
4679 if (opts
.addressprint
)
4680 ui_out_field_skip (uiout
, "addr");
4682 ui_out_text (uiout
, "fork");
4683 if (!ptid_equal (b
->forked_inferior_pid
, null_ptid
))
4685 ui_out_text (uiout
, ", process ");
4686 ui_out_field_int (uiout
, "what",
4687 ptid_get_pid (b
->forked_inferior_pid
));
4688 ui_out_spaces (uiout
, 1);
4692 /* Implement the "print_mention" breakpoint_ops method for fork
4696 print_mention_catch_fork (struct breakpoint
*b
)
4698 printf_filtered (_("Catchpoint %d (fork)"), b
->number
);
4701 /* The breakpoint_ops structure to be used in fork catchpoints. */
4703 static struct breakpoint_ops catch_fork_breakpoint_ops
=
4707 breakpoint_hit_catch_fork
,
4708 print_it_catch_fork
,
4709 print_one_catch_fork
,
4710 print_mention_catch_fork
4713 /* Implement the "insert" breakpoint_ops method for vfork catchpoints. */
4716 insert_catch_vfork (struct breakpoint
*b
)
4718 target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
4721 /* Implement the "remove" breakpoint_ops method for vfork catchpoints. */
4724 remove_catch_vfork (struct breakpoint
*b
)
4726 return target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
4729 /* Implement the "breakpoint_hit" breakpoint_ops method for vfork
4733 breakpoint_hit_catch_vfork (struct breakpoint
*b
)
4735 return inferior_has_vforked (inferior_ptid
, &b
->forked_inferior_pid
);
4738 /* Implement the "print_it" breakpoint_ops method for vfork catchpoints. */
4740 static enum print_stop_action
4741 print_it_catch_vfork (struct breakpoint
*b
)
4743 annotate_catchpoint (b
->number
);
4744 printf_filtered (_("\nCatchpoint %d (vforked process %d), "),
4745 b
->number
, ptid_get_pid (b
->forked_inferior_pid
));
4746 return PRINT_SRC_AND_LOC
;
4749 /* Implement the "print_one" breakpoint_ops method for vfork catchpoints. */
4752 print_one_catch_vfork (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
4754 struct value_print_options opts
;
4756 get_user_print_options (&opts
);
4757 /* Field 4, the address, is omitted (which makes the columns
4758 not line up too nicely with the headers, but the effect
4759 is relatively readable). */
4760 if (opts
.addressprint
)
4761 ui_out_field_skip (uiout
, "addr");
4763 ui_out_text (uiout
, "vfork");
4764 if (!ptid_equal (b
->forked_inferior_pid
, null_ptid
))
4766 ui_out_text (uiout
, ", process ");
4767 ui_out_field_int (uiout
, "what",
4768 ptid_get_pid (b
->forked_inferior_pid
));
4769 ui_out_spaces (uiout
, 1);
4773 /* Implement the "print_mention" breakpoint_ops method for vfork
4777 print_mention_catch_vfork (struct breakpoint
*b
)
4779 printf_filtered (_("Catchpoint %d (vfork)"), b
->number
);
4782 /* The breakpoint_ops structure to be used in vfork catchpoints. */
4784 static struct breakpoint_ops catch_vfork_breakpoint_ops
=
4788 breakpoint_hit_catch_vfork
,
4789 print_it_catch_vfork
,
4790 print_one_catch_vfork
,
4791 print_mention_catch_vfork
4794 /* Create a new breakpoint of the bp_catchpoint kind and return it.
4796 If TEMPFLAG is non-zero, then make the breakpoint temporary.
4797 If COND_STRING is not NULL, then store it in the breakpoint.
4798 OPS, if not NULL, is the breakpoint_ops structure associated
4799 to the catchpoint. */
4801 static struct breakpoint
*
4802 create_catchpoint (int tempflag
, char *cond_string
,
4803 struct breakpoint_ops
*ops
)
4805 struct symtab_and_line sal
;
4806 struct breakpoint
*b
;
4813 b
= set_raw_breakpoint (sal
, bp_catchpoint
);
4814 set_breakpoint_count (breakpoint_count
+ 1);
4815 b
->number
= breakpoint_count
;
4817 b
->cond_string
= (cond_string
== NULL
) ? NULL
: xstrdup (cond_string
);
4819 b
->addr_string
= NULL
;
4820 b
->enable_state
= bp_enabled
;
4821 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4825 update_global_location_list (1);
4831 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4832 struct breakpoint_ops
*ops
)
4834 struct breakpoint
*b
= create_catchpoint (tempflag
, cond_string
, ops
);
4836 /* FIXME: We should put this information in a breakpoint private data
4838 b
->forked_inferior_pid
= null_ptid
;
4841 /* Exec catchpoints. */
4844 insert_catch_exec (struct breakpoint
*b
)
4846 target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
4850 remove_catch_exec (struct breakpoint
*b
)
4852 return target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
4856 breakpoint_hit_catch_exec (struct breakpoint
*b
)
4858 return inferior_has_execd (inferior_ptid
, &b
->exec_pathname
);
4861 static enum print_stop_action
4862 print_it_catch_exec (struct breakpoint
*b
)
4864 annotate_catchpoint (b
->number
);
4865 printf_filtered (_("\nCatchpoint %d (exec'd %s), "), b
->number
,
4867 return PRINT_SRC_AND_LOC
;
4871 print_one_catch_exec (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
4873 struct value_print_options opts
;
4875 get_user_print_options (&opts
);
4877 /* Field 4, the address, is omitted (which makes the columns
4878 not line up too nicely with the headers, but the effect
4879 is relatively readable). */
4880 if (opts
.addressprint
)
4881 ui_out_field_skip (uiout
, "addr");
4883 ui_out_text (uiout
, "exec");
4884 if (b
->exec_pathname
!= NULL
)
4886 ui_out_text (uiout
, ", program \"");
4887 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
4888 ui_out_text (uiout
, "\" ");
4893 print_mention_catch_exec (struct breakpoint
*b
)
4895 printf_filtered (_("Catchpoint %d (exec)"), b
->number
);
4898 static struct breakpoint_ops catch_exec_breakpoint_ops
=
4902 breakpoint_hit_catch_exec
,
4903 print_it_catch_exec
,
4904 print_one_catch_exec
,
4905 print_mention_catch_exec
4909 hw_breakpoint_used_count (void)
4911 struct breakpoint
*b
;
4916 if (b
->type
== bp_hardware_breakpoint
&& breakpoint_enabled (b
))
4924 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4926 struct breakpoint
*b
;
4929 *other_type_used
= 0;
4932 if (breakpoint_enabled (b
))
4934 if (b
->type
== type
)
4936 else if ((b
->type
== bp_hardware_watchpoint
||
4937 b
->type
== bp_read_watchpoint
||
4938 b
->type
== bp_access_watchpoint
))
4939 *other_type_used
= 1;
4946 disable_watchpoints_before_interactive_call_start (void)
4948 struct breakpoint
*b
;
4952 if (((b
->type
== bp_watchpoint
)
4953 || (b
->type
== bp_hardware_watchpoint
)
4954 || (b
->type
== bp_read_watchpoint
)
4955 || (b
->type
== bp_access_watchpoint
))
4956 && breakpoint_enabled (b
))
4958 b
->enable_state
= bp_call_disabled
;
4959 update_global_location_list (0);
4965 enable_watchpoints_after_interactive_call_stop (void)
4967 struct breakpoint
*b
;
4971 if (((b
->type
== bp_watchpoint
)
4972 || (b
->type
== bp_hardware_watchpoint
)
4973 || (b
->type
== bp_read_watchpoint
)
4974 || (b
->type
== bp_access_watchpoint
))
4975 && (b
->enable_state
== bp_call_disabled
))
4977 b
->enable_state
= bp_enabled
;
4978 update_global_location_list (1);
4984 /* Set a breakpoint that will evaporate an end of command
4985 at address specified by SAL.
4986 Restrict it to frame FRAME if FRAME is nonzero. */
4989 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4992 struct breakpoint
*b
;
4993 b
= set_raw_breakpoint (sal
, type
);
4994 b
->enable_state
= bp_enabled
;
4995 b
->disposition
= disp_donttouch
;
4996 b
->frame_id
= frame_id
;
4998 /* If we're debugging a multi-threaded program, then we
4999 want momentary breakpoints to be active in only a
5000 single thread of control. */
5001 if (in_thread_list (inferior_ptid
))
5002 b
->thread
= pid_to_thread_id (inferior_ptid
);
5004 update_global_location_list_nothrow (1);
5009 /* Make a deep copy of momentary breakpoint ORIG. Returns NULL if
5013 clone_momentary_breakpoint (struct breakpoint
*orig
)
5015 struct breakpoint
*copy
;
5017 /* If there's nothing to clone, then return nothing. */
5021 copy
= set_raw_breakpoint_without_location (orig
->type
);
5022 copy
->loc
= allocate_bp_location (copy
);
5023 set_breakpoint_location_function (copy
->loc
);
5025 copy
->loc
->requested_address
= orig
->loc
->requested_address
;
5026 copy
->loc
->address
= orig
->loc
->address
;
5027 copy
->loc
->section
= orig
->loc
->section
;
5029 if (orig
->source_file
== NULL
)
5030 copy
->source_file
= NULL
;
5032 copy
->source_file
= xstrdup (orig
->source_file
);
5034 copy
->line_number
= orig
->line_number
;
5035 copy
->frame_id
= orig
->frame_id
;
5036 copy
->thread
= orig
->thread
;
5038 copy
->enable_state
= bp_enabled
;
5039 copy
->disposition
= disp_donttouch
;
5040 copy
->number
= internal_breakpoint_number
--;
5042 update_global_location_list_nothrow (0);
5047 set_momentary_breakpoint_at_pc (CORE_ADDR pc
, enum bptype type
)
5049 struct symtab_and_line sal
;
5051 sal
= find_pc_line (pc
, 0);
5053 sal
.section
= find_pc_overlay (pc
);
5054 sal
.explicit_pc
= 1;
5056 return set_momentary_breakpoint (sal
, null_frame_id
, type
);
5060 /* Tell the user we have just set a breakpoint B. */
5063 mention (struct breakpoint
*b
)
5066 struct cleanup
*ui_out_chain
;
5067 struct value_print_options opts
;
5069 get_user_print_options (&opts
);
5071 /* FIXME: This is misplaced; mention() is called by things (like
5072 hitting a watchpoint) other than breakpoint creation. It should
5073 be possible to clean this up and at the same time replace the
5074 random calls to breakpoint_changed with this hook. */
5075 observer_notify_breakpoint_created (b
->number
);
5077 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
5078 b
->ops
->print_mention (b
);
5083 printf_filtered (_("(apparently deleted?) Eventpoint %d: "), b
->number
);
5086 ui_out_text (uiout
, "Watchpoint ");
5087 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
5088 ui_out_field_int (uiout
, "number", b
->number
);
5089 ui_out_text (uiout
, ": ");
5090 ui_out_field_string (uiout
, "exp", b
->exp_string
);
5091 do_cleanups (ui_out_chain
);
5093 case bp_hardware_watchpoint
:
5094 ui_out_text (uiout
, "Hardware watchpoint ");
5095 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
5096 ui_out_field_int (uiout
, "number", b
->number
);
5097 ui_out_text (uiout
, ": ");
5098 ui_out_field_string (uiout
, "exp", b
->exp_string
);
5099 do_cleanups (ui_out_chain
);
5101 case bp_read_watchpoint
:
5102 ui_out_text (uiout
, "Hardware read watchpoint ");
5103 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
5104 ui_out_field_int (uiout
, "number", b
->number
);
5105 ui_out_text (uiout
, ": ");
5106 ui_out_field_string (uiout
, "exp", b
->exp_string
);
5107 do_cleanups (ui_out_chain
);
5109 case bp_access_watchpoint
:
5110 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
5111 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
5112 ui_out_field_int (uiout
, "number", b
->number
);
5113 ui_out_text (uiout
, ": ");
5114 ui_out_field_string (uiout
, "exp", b
->exp_string
);
5115 do_cleanups (ui_out_chain
);
5118 if (ui_out_is_mi_like_p (uiout
))
5123 if (b
->disposition
== disp_del
)
5124 printf_filtered (_("Temporary breakpoint"));
5126 printf_filtered (_("Breakpoint"));
5127 printf_filtered (_(" %d"), b
->number
);
5130 case bp_hardware_breakpoint
:
5131 if (ui_out_is_mi_like_p (uiout
))
5136 printf_filtered (_("Hardware assisted breakpoint %d"), b
->number
);
5140 if (ui_out_is_mi_like_p (uiout
))
5145 printf_filtered (_("Tracepoint"));
5146 printf_filtered (_(" %d"), b
->number
);
5153 case bp_longjmp_resume
:
5154 case bp_step_resume
:
5156 case bp_watchpoint_scope
:
5157 case bp_shlib_event
:
5158 case bp_thread_event
:
5159 case bp_overlay_event
:
5165 /* i18n: cagney/2005-02-11: Below needs to be merged into a
5169 printf_filtered (_(" (%s) pending."), b
->addr_string
);
5173 if (opts
.addressprint
|| b
->source_file
== NULL
)
5175 printf_filtered (" at ");
5176 fputs_filtered (paddress (b
->loc
->address
), gdb_stdout
);
5179 printf_filtered (": file %s, line %d.",
5180 b
->source_file
, b
->line_number
);
5184 struct bp_location
*loc
= b
->loc
;
5186 for (; loc
; loc
= loc
->next
)
5188 printf_filtered (" (%d locations)", n
);
5193 if (ui_out_is_mi_like_p (uiout
))
5195 printf_filtered ("\n");
5199 static struct bp_location
*
5200 add_location_to_breakpoint (struct breakpoint
*b
,
5201 const struct symtab_and_line
*sal
)
5203 struct bp_location
*loc
, **tmp
;
5205 loc
= allocate_bp_location (b
);
5206 for (tmp
= &(b
->loc
); *tmp
!= NULL
; tmp
= &((*tmp
)->next
))
5209 loc
->requested_address
= sal
->pc
;
5210 loc
->address
= adjust_breakpoint_address (loc
->requested_address
, b
->type
);
5211 loc
->section
= sal
->section
;
5213 set_breakpoint_location_function (loc
);
5218 /* Return 1 if LOC is pointing to a permanent breakpoint,
5219 return 0 otherwise. */
5222 bp_loc_is_permanent (struct bp_location
*loc
)
5226 const gdb_byte
*brk
;
5227 gdb_byte
*target_mem
;
5228 struct cleanup
*cleanup
;
5231 gdb_assert (loc
!= NULL
);
5233 addr
= loc
->address
;
5234 brk
= gdbarch_breakpoint_from_pc (current_gdbarch
, &addr
, &len
);
5236 /* Software breakpoints unsupported? */
5240 target_mem
= alloca (len
);
5242 /* Enable the automatic memory restoration from breakpoints while
5243 we read the memory. Otherwise we could say about our temporary
5244 breakpoints they are permanent. */
5245 cleanup
= make_show_memory_breakpoints_cleanup (0);
5247 if (target_read_memory (loc
->address
, target_mem
, len
) == 0
5248 && memcmp (target_mem
, brk
, len
) == 0)
5251 do_cleanups (cleanup
);
5258 /* Create a breakpoint with SAL as location. Use ADDR_STRING
5259 as textual description of the location, and COND_STRING
5260 as condition expression. */
5263 create_breakpoint (struct symtabs_and_lines sals
, char *addr_string
,
5265 enum bptype type
, enum bpdisp disposition
,
5266 int thread
, int task
, int ignore_count
,
5267 struct breakpoint_ops
*ops
, int from_tty
, int enabled
)
5269 struct breakpoint
*b
= NULL
;
5272 if (type
== bp_hardware_breakpoint
)
5274 int i
= hw_breakpoint_used_count ();
5275 int target_resources_ok
=
5276 target_can_use_hardware_watchpoint (bp_hardware_breakpoint
,
5278 if (target_resources_ok
== 0)
5279 error (_("No hardware breakpoint support in the target."));
5280 else if (target_resources_ok
< 0)
5281 error (_("Hardware breakpoints used exceeds limit."));
5284 for (i
= 0; i
< sals
.nelts
; ++i
)
5286 struct symtab_and_line sal
= sals
.sals
[i
];
5287 struct bp_location
*loc
;
5290 describe_other_breakpoints (sal
.pc
, sal
.section
, thread
);
5294 b
= set_raw_breakpoint (sal
, type
);
5295 set_breakpoint_count (breakpoint_count
+ 1);
5296 b
->number
= breakpoint_count
;
5300 b
->cond_string
= cond_string
;
5301 b
->ignore_count
= ignore_count
;
5302 b
->enable_state
= enabled
? bp_enabled
: bp_disabled
;
5303 b
->disposition
= disposition
;
5309 loc
= add_location_to_breakpoint (b
, &sal
);
5312 if (bp_loc_is_permanent (loc
))
5313 make_breakpoint_permanent (b
);
5317 char *arg
= b
->cond_string
;
5318 loc
->cond
= parse_exp_1 (&arg
, block_for_pc (loc
->address
), 0);
5320 error (_("Garbage %s follows condition"), arg
);
5325 b
->addr_string
= addr_string
;
5327 /* addr_string has to be used or breakpoint_re_set will delete
5329 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
5335 /* Remove element at INDEX_TO_REMOVE from SAL, shifting other
5336 elements to fill the void space. */
5338 remove_sal (struct symtabs_and_lines
*sal
, int index_to_remove
)
5340 int i
= index_to_remove
+1;
5341 int last_index
= sal
->nelts
-1;
5343 for (;i
<= last_index
; ++i
)
5344 sal
->sals
[i
-1] = sal
->sals
[i
];
5349 /* If appropriate, obtains all sals that correspond
5350 to the same file and line as SAL. This is done
5351 only if SAL does not have explicit PC and has
5352 line and file information. If we got just a single
5353 expanded sal, return the original.
5355 Otherwise, if SAL.explicit_line is not set, filter out
5356 all sals for which the name of enclosing function
5357 is different from SAL. This makes sure that if we have
5358 breakpoint originally set in template instantiation, say
5359 foo<int>(), we won't expand SAL to locations at the same
5360 line in all existing instantiations of 'foo'.
5363 static struct symtabs_and_lines
5364 expand_line_sal_maybe (struct symtab_and_line sal
)
5366 struct symtabs_and_lines expanded
;
5367 CORE_ADDR original_pc
= sal
.pc
;
5368 char *original_function
= NULL
;
5372 /* If we have explicit pc, don't expand.
5373 If we have no line number, we can't expand. */
5374 if (sal
.explicit_pc
|| sal
.line
== 0 || sal
.symtab
== NULL
)
5377 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5378 expanded
.sals
[0] = sal
;
5383 find_pc_partial_function (original_pc
, &original_function
, NULL
, NULL
);
5385 expanded
= expand_line_sal (sal
);
5386 if (expanded
.nelts
== 1)
5388 /* We had one sal, we got one sal. Without futher
5389 processing, just return the original sal. */
5390 xfree (expanded
.sals
);
5392 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5393 sal
.pc
= original_pc
;
5394 expanded
.sals
[0] = sal
;
5398 if (!sal
.explicit_line
)
5400 CORE_ADDR func_addr
, func_end
;
5401 for (i
= 0; i
< expanded
.nelts
; ++i
)
5403 CORE_ADDR pc
= expanded
.sals
[i
].pc
;
5404 char *this_function
;
5405 if (find_pc_partial_function (pc
, &this_function
,
5406 &func_addr
, &func_end
))
5408 if (this_function
&&
5409 strcmp (this_function
, original_function
) != 0)
5411 remove_sal (&expanded
, i
);
5414 else if (func_addr
== pc
)
5416 /* We're at beginning of a function, and should
5418 struct symbol
*sym
= find_pc_function (pc
);
5420 expanded
.sals
[i
] = find_function_start_sal (sym
, 1);
5423 = gdbarch_skip_prologue (current_gdbarch
, pc
);
5430 if (expanded
.nelts
<= 1)
5432 /* This is un ugly workaround. If we get zero
5433 expanded sals then something is really wrong.
5434 Fix that by returnign the original sal. */
5435 xfree (expanded
.sals
);
5437 expanded
.sals
= xmalloc (sizeof (struct symtab_and_line
));
5438 sal
.pc
= original_pc
;
5439 expanded
.sals
[0] = sal
;
5446 for (i
= 0; i
< expanded
.nelts
; ++i
)
5447 if (expanded
.sals
[i
].pc
== original_pc
)
5458 /* Add SALS.nelts breakpoints to the breakpoint table. For each
5459 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i]
5460 value. COND_STRING, if not NULL, specified the condition to be
5461 used for all breakpoints. Essentially the only case where
5462 SALS.nelts is not 1 is when we set a breakpoint on an overloaded
5463 function. In that case, it's still not possible to specify
5464 separate conditions for different overloaded functions, so
5465 we take just a single condition string.
5467 NOTE: If the function succeeds, the caller is expected to cleanup
5468 the arrays ADDR_STRING, COND_STRING, and SALS (but not the
5469 array contents). If the function fails (error() is called), the
5470 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
5471 COND and SALS arrays and each of those arrays contents. */
5474 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
5476 enum bptype type
, enum bpdisp disposition
,
5477 int thread
, int task
, int ignore_count
,
5478 struct breakpoint_ops
*ops
, int from_tty
,
5482 for (i
= 0; i
< sals
.nelts
; ++i
)
5484 struct symtabs_and_lines expanded
=
5485 expand_line_sal_maybe (sals
.sals
[i
]);
5487 create_breakpoint (expanded
, addr_string
[i
],
5488 cond_string
, type
, disposition
,
5489 thread
, task
, ignore_count
, ops
, from_tty
, enabled
);
5493 /* Parse ARG which is assumed to be a SAL specification possibly
5494 followed by conditionals. On return, SALS contains an array of SAL
5495 addresses found. ADDR_STRING contains a vector of (canonical)
5496 address strings. ARG points to the end of the SAL. */
5499 parse_breakpoint_sals (char **address
,
5500 struct symtabs_and_lines
*sals
,
5501 char ***addr_string
,
5504 char *addr_start
= *address
;
5505 *addr_string
= NULL
;
5506 /* If no arg given, or if first arg is 'if ', use the default
5508 if ((*address
) == NULL
5509 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
5511 if (default_breakpoint_valid
)
5513 struct symtab_and_line sal
;
5514 init_sal (&sal
); /* initialize to zeroes */
5515 sals
->sals
= (struct symtab_and_line
*)
5516 xmalloc (sizeof (struct symtab_and_line
));
5517 sal
.pc
= default_breakpoint_address
;
5518 sal
.line
= default_breakpoint_line
;
5519 sal
.symtab
= default_breakpoint_symtab
;
5520 sal
.section
= find_pc_overlay (sal
.pc
);
5522 /* "break" without arguments is equivalent to "break *PC" where PC is
5523 the default_breakpoint_address. So make sure to set
5524 sal.explicit_pc to prevent GDB from trying to expand the list of
5525 sals to include all other instances with the same symtab and line.
5527 sal
.explicit_pc
= 1;
5529 sals
->sals
[0] = sal
;
5533 error (_("No default breakpoint address now."));
5537 /* Force almost all breakpoints to be in terms of the
5538 current_source_symtab (which is decode_line_1's default). This
5539 should produce the results we want almost all of the time while
5540 leaving default_breakpoint_* alone.
5541 ObjC: However, don't match an Objective-C method name which
5542 may have a '+' or '-' succeeded by a '[' */
5544 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
5546 if (default_breakpoint_valid
5548 || ((strchr ("+-", (*address
)[0]) != NULL
)
5549 && ((*address
)[1] != '['))))
5550 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
5551 default_breakpoint_line
, addr_string
,
5554 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0,
5555 addr_string
, not_found_ptr
);
5557 /* For any SAL that didn't have a canonical string, fill one in. */
5558 if (sals
->nelts
> 0 && *addr_string
== NULL
)
5559 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
5560 if (addr_start
!= (*address
))
5563 for (i
= 0; i
< sals
->nelts
; i
++)
5565 /* Add the string if not present. */
5566 if ((*addr_string
)[i
] == NULL
)
5567 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
5573 /* Convert each SAL into a real PC. Verify that the PC can be
5574 inserted as a breakpoint. If it can't throw an error. */
5577 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
5581 for (i
= 0; i
< sals
->nelts
; i
++)
5582 resolve_sal_pc (&sals
->sals
[i
]);
5586 do_captured_parse_breakpoint (struct ui_out
*ui
, void *data
)
5588 struct captured_parse_breakpoint_args
*args
= data
;
5590 parse_breakpoint_sals (args
->arg_p
, args
->sals_p
, args
->addr_string_p
,
5591 args
->not_found_ptr
);
5594 /* Given TOK, a string specification of condition and thread, as
5595 accepted by the 'break' command, extract the condition
5596 string and thread number and set *COND_STRING and *THREAD.
5597 PC identifies the context at which the condition should be parsed.
5598 If no condition is found, *COND_STRING is set to NULL.
5599 If no thread is found, *THREAD is set to -1. */
5601 find_condition_and_thread (char *tok
, CORE_ADDR pc
,
5602 char **cond_string
, int *thread
, int *task
)
5604 *cond_string
= NULL
;
5610 char *cond_start
= NULL
;
5611 char *cond_end
= NULL
;
5612 while (*tok
== ' ' || *tok
== '\t')
5617 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5620 toklen
= end_tok
- tok
;
5622 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5624 struct expression
*expr
;
5626 tok
= cond_start
= end_tok
+ 1;
5627 expr
= parse_exp_1 (&tok
, block_for_pc (pc
), 0);
5630 *cond_string
= savestring (cond_start
,
5631 cond_end
- cond_start
);
5633 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5639 *thread
= strtol (tok
, &tok
, 0);
5641 error (_("Junk after thread keyword."));
5642 if (!valid_thread_id (*thread
))
5643 error (_("Unknown thread %d."), *thread
);
5645 else if (toklen
>= 1 && strncmp (tok
, "task", toklen
) == 0)
5651 *task
= strtol (tok
, &tok
, 0);
5653 error (_("Junk after task keyword."));
5654 if (!valid_task_id (*task
))
5655 error (_("Unknown task %d\n"), *task
);
5658 error (_("Junk at end of arguments."));
5662 /* Set a breakpoint. This function is shared between
5663 CLI and MI functions for setting a breakpoint.
5664 This function has two major modes of operations,
5665 selected by the PARSE_CONDITION_AND_THREAD parameter.
5666 If non-zero, the function will parse arg, extracting
5667 breakpoint location, address and thread. Otherwise,
5668 ARG is just the location of breakpoint, with condition
5669 and thread specified by the COND_STRING and THREAD
5673 break_command_really (char *arg
, char *cond_string
, int thread
,
5674 int parse_condition_and_thread
,
5675 int tempflag
, int hardwareflag
, int traceflag
,
5677 enum auto_boolean pending_break_support
,
5678 struct breakpoint_ops
*ops
,
5682 struct gdb_exception e
;
5683 struct symtabs_and_lines sals
;
5684 struct symtab_and_line pending_sal
;
5687 char *addr_start
= arg
;
5689 struct cleanup
*old_chain
;
5690 struct cleanup
*breakpoint_chain
= NULL
;
5691 struct captured_parse_breakpoint_args parse_args
;
5695 enum bptype type_wanted
;
5702 parse_args
.arg_p
= &arg
;
5703 parse_args
.sals_p
= &sals
;
5704 parse_args
.addr_string_p
= &addr_string
;
5705 parse_args
.not_found_ptr
= ¬_found
;
5707 e
= catch_exception (uiout
, do_captured_parse_breakpoint
,
5708 &parse_args
, RETURN_MASK_ALL
);
5710 /* If caller is interested in rc value from parse, set value. */
5714 throw_exception (e
);
5718 case NOT_FOUND_ERROR
:
5720 /* If pending breakpoint support is turned off, throw
5723 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
5724 throw_exception (e
);
5726 exception_print (gdb_stderr
, e
);
5728 /* If pending breakpoint support is auto query and the user
5729 selects no, then simply return the error code. */
5730 if (pending_break_support
== AUTO_BOOLEAN_AUTO
&&
5731 !nquery ("Make breakpoint pending on future shared library load? "))
5734 /* At this point, either the user was queried about setting
5735 a pending breakpoint and selected yes, or pending
5736 breakpoint behavior is on and thus a pending breakpoint
5737 is defaulted on behalf of the user. */
5738 copy_arg
= xstrdup (addr_start
);
5739 addr_string
= ©_arg
;
5741 sals
.sals
= &pending_sal
;
5746 throw_exception (e
);
5753 /* Create a chain of things that always need to be cleaned up. */
5754 old_chain
= make_cleanup (null_cleanup
, 0);
5758 /* Make sure that all storage allocated to SALS gets freed. */
5759 make_cleanup (xfree
, sals
.sals
);
5761 /* Cleanup the addr_string array but not its contents. */
5762 make_cleanup (xfree
, addr_string
);
5765 /* ----------------------------- SNIP -----------------------------
5766 Anything added to the cleanup chain beyond this point is assumed
5767 to be part of a breakpoint. If the breakpoint create succeeds
5768 then the memory is not reclaimed. */
5769 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5771 /* Mark the contents of the addr_string for cleanup. These go on
5772 the breakpoint_chain and only occure if the breakpoint create
5774 for (i
= 0; i
< sals
.nelts
; i
++)
5776 if (addr_string
[i
] != NULL
)
5777 make_cleanup (xfree
, addr_string
[i
]);
5780 /* Resolve all line numbers to PC's and verify that the addresses
5781 are ok for the target. */
5783 breakpoint_sals_to_pc (&sals
, addr_start
);
5785 type_wanted
= (traceflag
5787 : (hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
));
5789 /* Verify that condition can be parsed, before setting any
5790 breakpoints. Allocate a separate condition expression for each
5794 if (parse_condition_and_thread
)
5796 /* Here we only parse 'arg' to separate condition
5797 from thread number, so parsing in context of first
5798 sal is OK. When setting the breakpoint we'll
5799 re-parse it in context of each sal. */
5802 find_condition_and_thread (arg
, sals
.sals
[0].pc
, &cond_string
,
5805 make_cleanup (xfree
, cond_string
);
5809 /* Create a private copy of condition string. */
5812 cond_string
= xstrdup (cond_string
);
5813 make_cleanup (xfree
, cond_string
);
5816 create_breakpoints (sals
, addr_string
, cond_string
, type_wanted
,
5817 tempflag
? disp_del
: disp_donttouch
,
5818 thread
, task
, ignore_count
, ops
, from_tty
, enabled
);
5822 struct symtab_and_line sal
= {0};
5823 struct breakpoint
*b
;
5825 make_cleanup (xfree
, copy_arg
);
5827 b
= set_raw_breakpoint_without_location (type_wanted
);
5828 set_breakpoint_count (breakpoint_count
+ 1);
5829 b
->number
= breakpoint_count
;
5831 b
->addr_string
= addr_string
[0];
5832 b
->cond_string
= NULL
;
5833 b
->ignore_count
= ignore_count
;
5834 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5835 b
->condition_not_parsed
= 1;
5837 b
->enable_state
= enabled
? bp_enabled
: bp_disabled
;
5843 warning (_("Multiple breakpoints were set.\n"
5844 "Use the \"delete\" command to delete unwanted breakpoints."));
5845 /* That's it. Discard the cleanups for data inserted into the
5847 discard_cleanups (breakpoint_chain
);
5848 /* But cleanup everything else. */
5849 do_cleanups (old_chain
);
5851 /* error call may happen here - have BREAKPOINT_CHAIN already discarded. */
5852 update_global_location_list (1);
5855 /* Set a breakpoint.
5856 ARG is a string describing breakpoint address,
5857 condition, and thread.
5858 FLAG specifies if a breakpoint is hardware on,
5859 and if breakpoint is temporary, using BP_HARDWARE_FLAG
5863 break_command_1 (char *arg
, int flag
, int from_tty
)
5865 int hardwareflag
= flag
& BP_HARDWAREFLAG
;
5866 int tempflag
= flag
& BP_TEMPFLAG
;
5868 break_command_really (arg
,
5869 NULL
, 0, 1 /* parse arg */,
5870 tempflag
, hardwareflag
, 0 /* traceflag */,
5871 0 /* Ignore count */,
5872 pending_break_support
,
5873 NULL
/* breakpoint_ops */,
5880 set_breakpoint (char *address
, char *condition
,
5881 int hardwareflag
, int tempflag
,
5882 int thread
, int ignore_count
,
5883 int pending
, int enabled
)
5885 break_command_really (address
, condition
, thread
,
5886 0 /* condition and thread are valid. */,
5887 tempflag
, hardwareflag
, 0 /* traceflag */,
5890 ? AUTO_BOOLEAN_TRUE
: AUTO_BOOLEAN_FALSE
,
5894 /* Adjust SAL to the first instruction past the function prologue.
5895 The end of the prologue is determined using the line table from
5896 the debugging information.
5898 If SAL is already past the prologue, then do nothing. */
5901 skip_prologue_sal (struct symtab_and_line
*sal
)
5903 struct symbol
*sym
= find_pc_function (sal
->pc
);
5904 struct symtab_and_line start_sal
;
5909 start_sal
= find_function_start_sal (sym
, 1);
5910 if (sal
->pc
< start_sal
.pc
)
5914 /* Helper function for break_command_1 and disassemble_command. */
5917 resolve_sal_pc (struct symtab_and_line
*sal
)
5921 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5923 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5924 error (_("No line %d in file \"%s\"."),
5925 sal
->line
, sal
->symtab
->filename
);
5928 /* If this SAL corresponds to a breakpoint inserted using
5929 a line number, then skip the function prologue if necessary. */
5930 if (sal
->explicit_line
)
5932 /* Preserve the original line number. */
5933 int saved_line
= sal
->line
;
5934 skip_prologue_sal (sal
);
5935 sal
->line
= saved_line
;
5939 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5941 struct blockvector
*bv
;
5945 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &b
, sal
->symtab
);
5948 sym
= block_linkage_function (b
);
5951 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5952 sal
->section
= SYMBOL_OBJ_SECTION (sym
);
5956 /* It really is worthwhile to have the section, so we'll just
5957 have to look harder. This case can be executed if we have
5958 line numbers but no functions (as can happen in assembly
5961 struct minimal_symbol
*msym
;
5963 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5965 sal
->section
= SYMBOL_OBJ_SECTION (msym
);
5972 break_command (char *arg
, int from_tty
)
5974 break_command_1 (arg
, 0, from_tty
);
5978 tbreak_command (char *arg
, int from_tty
)
5980 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5984 hbreak_command (char *arg
, int from_tty
)
5986 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5990 thbreak_command (char *arg
, int from_tty
)
5992 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5996 stop_command (char *arg
, int from_tty
)
5998 printf_filtered (_("Specify the type of breakpoint to set.\n\
5999 Usage: stop in <function | address>\n\
6000 stop at <line>\n"));
6004 stopin_command (char *arg
, int from_tty
)
6008 if (arg
== (char *) NULL
)
6010 else if (*arg
!= '*')
6015 /* look for a ':'. If this is a line number specification, then
6016 say it is bad, otherwise, it should be an address or
6017 function/method name */
6018 while (*argptr
&& !hasColon
)
6020 hasColon
= (*argptr
== ':');
6025 badInput
= (*argptr
!= ':'); /* Not a class::method */
6027 badInput
= isdigit (*arg
); /* a simple line number */
6031 printf_filtered (_("Usage: stop in <function | address>\n"));
6033 break_command_1 (arg
, 0, from_tty
);
6037 stopat_command (char *arg
, int from_tty
)
6041 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
6048 /* look for a ':'. If there is a '::' then get out, otherwise
6049 it is probably a line number. */
6050 while (*argptr
&& !hasColon
)
6052 hasColon
= (*argptr
== ':');
6057 badInput
= (*argptr
== ':'); /* we have class::method */
6059 badInput
= !isdigit (*arg
); /* not a line number */
6063 printf_filtered (_("Usage: stop at <line>\n"));
6065 break_command_1 (arg
, 0, from_tty
);
6068 /* accessflag: hw_write: watch write,
6069 hw_read: watch read,
6070 hw_access: watch access (read or write) */
6072 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
6074 struct breakpoint
*b
, *scope_breakpoint
= NULL
;
6075 struct symtab_and_line sal
;
6076 struct expression
*exp
;
6077 struct block
*exp_valid_block
;
6078 struct value
*val
, *mark
;
6079 struct frame_info
*frame
;
6080 struct frame_info
*prev_frame
= NULL
;
6081 char *exp_start
= NULL
;
6082 char *exp_end
= NULL
;
6083 char *tok
, *id_tok_start
, *end_tok
;
6085 char *cond_start
= NULL
;
6086 char *cond_end
= NULL
;
6087 struct expression
*cond
= NULL
;
6088 int i
, other_type_used
, target_resources_ok
= 0;
6089 enum bptype bp_type
;
6093 init_sal (&sal
); /* initialize to zeroes */
6095 /* Make sure that we actually have parameters to parse. */
6096 if (arg
!= NULL
&& arg
[0] != '\0')
6098 toklen
= strlen (arg
); /* Size of argument list. */
6100 /* Points tok to the end of the argument list. */
6101 tok
= arg
+ toklen
- 1;
6103 /* Go backwards in the parameters list. Skip the last parameter.
6104 If we're expecting a 'thread <thread_num>' parameter, this should
6105 be the thread identifier. */
6106 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
6108 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
6111 /* Points end_tok to the beginning of the last token. */
6112 id_tok_start
= tok
+ 1;
6114 /* Go backwards in the parameters list. Skip one more parameter.
6115 If we're expecting a 'thread <thread_num>' parameter, we should
6116 reach a "thread" token. */
6117 while (tok
> arg
&& (*tok
== ' ' || *tok
== '\t'))
6122 while (tok
> arg
&& (*tok
!= ' ' && *tok
!= '\t'))
6125 /* Move the pointer forward to skip the whitespace and
6126 calculate the length of the token. */
6128 toklen
= end_tok
- tok
;
6130 if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
6132 /* At this point we've found a "thread" token, which means
6133 the user is trying to set a watchpoint that triggers
6134 only in a specific thread. */
6137 /* Extract the thread ID from the next token. */
6138 thread
= strtol (id_tok_start
, &endp
, 0);
6140 /* Check if the user provided a valid numeric value for the
6142 if (*endp
!= ' ' && *endp
!= '\t' && *endp
!= '\0')
6143 error (_("Invalid thread ID specification %s."), id_tok_start
);
6145 /* Check if the thread actually exists. */
6146 if (!valid_thread_id (thread
))
6147 error (_("Unknown thread %d."), thread
);
6149 /* Truncate the string and get rid of the thread <thread_num>
6150 parameter before the parameter list is parsed by the
6151 evaluate_expression() function. */
6156 /* Parse the rest of the arguments. */
6157 innermost_block
= NULL
;
6159 exp
= parse_exp_1 (&arg
, 0, 0);
6161 /* Remove trailing whitespace from the expression before saving it.
6162 This makes the eventual display of the expression string a bit
6164 while (exp_end
> exp_start
&& (exp_end
[-1] == ' ' || exp_end
[-1] == '\t'))
6167 exp_valid_block
= innermost_block
;
6168 mark
= value_mark ();
6169 fetch_watchpoint_value (exp
, &val
, NULL
, NULL
);
6171 release_value (val
);
6174 while (*tok
== ' ' || *tok
== '\t')
6178 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
6181 toklen
= end_tok
- tok
;
6182 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
6184 tok
= cond_start
= end_tok
+ 1;
6185 cond
= parse_exp_1 (&tok
, 0, 0);
6189 error (_("Junk at end of command."));
6191 if (accessflag
== hw_read
)
6192 bp_type
= bp_read_watchpoint
;
6193 else if (accessflag
== hw_access
)
6194 bp_type
= bp_access_watchpoint
;
6196 bp_type
= bp_hardware_watchpoint
;
6198 mem_cnt
= can_use_hardware_watchpoint (val
);
6199 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
6200 error (_("Expression cannot be implemented with read/access watchpoint."));
6203 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
6204 target_resources_ok
=
6205 target_can_use_hardware_watchpoint (bp_type
, i
+ mem_cnt
,
6207 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
6208 error (_("Target does not support this type of hardware watchpoint."));
6210 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
6211 error (_("Target can only support one kind of HW watchpoint at a time."));
6214 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
6215 watchpoint could not be set. */
6216 if (!mem_cnt
|| target_resources_ok
<= 0)
6217 bp_type
= bp_watchpoint
;
6219 frame
= block_innermost_frame (exp_valid_block
);
6221 prev_frame
= get_prev_frame (frame
);
6225 /* If the expression is "local", then set up a "watchpoint scope"
6226 breakpoint at the point where we've left the scope of the watchpoint
6227 expression. Create the scope breakpoint before the watchpoint, so
6228 that we will encounter it first in bpstat_stop_status. */
6229 if (innermost_block
&& prev_frame
)
6231 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
6232 bp_watchpoint_scope
);
6234 scope_breakpoint
->enable_state
= bp_enabled
;
6236 /* Automatically delete the breakpoint when it hits. */
6237 scope_breakpoint
->disposition
= disp_del
;
6239 /* Only break in the proper frame (help with recursion). */
6240 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
6242 /* Set the address at which we will stop. */
6243 scope_breakpoint
->loc
->requested_address
6244 = get_frame_pc (prev_frame
);
6245 scope_breakpoint
->loc
->address
6246 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
,
6247 scope_breakpoint
->type
);
6250 /* Now set up the breakpoint. */
6251 b
= set_raw_breakpoint (sal
, bp_type
);
6252 set_breakpoint_count (breakpoint_count
+ 1);
6253 b
->number
= breakpoint_count
;
6255 b
->disposition
= disp_donttouch
;
6257 b
->exp_valid_block
= exp_valid_block
;
6258 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
6261 b
->loc
->cond
= cond
;
6263 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
6268 b
->watchpoint_frame
= get_frame_id (frame
);
6270 b
->watchpoint_frame
= null_frame_id
;
6272 if (scope_breakpoint
!= NULL
)
6274 /* The scope breakpoint is related to the watchpoint. We will
6275 need to act on them together. */
6276 b
->related_breakpoint
= scope_breakpoint
;
6277 scope_breakpoint
->related_breakpoint
= b
;
6280 value_free_to_mark (mark
);
6282 update_global_location_list (1);
6285 /* Return count of locations need to be watched and can be handled
6286 in hardware. If the watchpoint can not be handled
6287 in hardware return zero. */
6290 can_use_hardware_watchpoint (struct value
*v
)
6292 int found_memory_cnt
= 0;
6293 struct value
*head
= v
;
6295 /* Did the user specifically forbid us to use hardware watchpoints? */
6296 if (!can_use_hw_watchpoints
)
6299 /* Make sure that the value of the expression depends only upon
6300 memory contents, and values computed from them within GDB. If we
6301 find any register references or function calls, we can't use a
6302 hardware watchpoint.
6304 The idea here is that evaluating an expression generates a series
6305 of values, one holding the value of every subexpression. (The
6306 expression a*b+c has five subexpressions: a, b, a*b, c, and
6307 a*b+c.) GDB's values hold almost enough information to establish
6308 the criteria given above --- they identify memory lvalues,
6309 register lvalues, computed values, etcetera. So we can evaluate
6310 the expression, and then scan the chain of values that leaves
6311 behind to decide whether we can detect any possible change to the
6312 expression's final value using only hardware watchpoints.
6314 However, I don't think that the values returned by inferior
6315 function calls are special in any way. So this function may not
6316 notice that an expression involving an inferior function call
6317 can't be watched with hardware watchpoints. FIXME. */
6318 for (; v
; v
= value_next (v
))
6320 if (VALUE_LVAL (v
) == lval_memory
)
6323 /* A lazy memory lvalue is one that GDB never needed to fetch;
6324 we either just used its address (e.g., `a' in `a.b') or
6325 we never needed it at all (e.g., `a' in `a,b'). */
6329 /* Ahh, memory we actually used! Check if we can cover
6330 it with hardware watchpoints. */
6331 struct type
*vtype
= check_typedef (value_type (v
));
6333 /* We only watch structs and arrays if user asked for it
6334 explicitly, never if they just happen to appear in a
6335 middle of some value chain. */
6337 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
6338 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
6340 CORE_ADDR vaddr
= value_address (v
);
6341 int len
= TYPE_LENGTH (value_type (v
));
6343 if (!target_region_ok_for_hw_watchpoint (vaddr
, len
))
6350 else if (VALUE_LVAL (v
) != not_lval
6351 && deprecated_value_modifiable (v
) == 0)
6352 return 0; /* ??? What does this represent? */
6353 else if (VALUE_LVAL (v
) == lval_register
)
6354 return 0; /* cannot watch a register with a HW watchpoint */
6357 /* The expression itself looks suitable for using a hardware
6358 watchpoint, but give the target machine a chance to reject it. */
6359 return found_memory_cnt
;
6363 watch_command_wrapper (char *arg
, int from_tty
)
6365 watch_command (arg
, from_tty
);
6369 watch_command (char *arg
, int from_tty
)
6371 watch_command_1 (arg
, hw_write
, from_tty
);
6375 rwatch_command_wrapper (char *arg
, int from_tty
)
6377 rwatch_command (arg
, from_tty
);
6381 rwatch_command (char *arg
, int from_tty
)
6383 watch_command_1 (arg
, hw_read
, from_tty
);
6387 awatch_command_wrapper (char *arg
, int from_tty
)
6389 awatch_command (arg
, from_tty
);
6393 awatch_command (char *arg
, int from_tty
)
6395 watch_command_1 (arg
, hw_access
, from_tty
);
6399 /* Helper routines for the until_command routine in infcmd.c. Here
6400 because it uses the mechanisms of breakpoints. */
6402 struct until_break_command_continuation_args
6404 struct breakpoint
*breakpoint
;
6405 struct breakpoint
*breakpoint2
;
6408 /* This function is called by fetch_inferior_event via the
6409 cmd_continuation pointer, to complete the until command. It takes
6410 care of cleaning up the temporary breakpoints set up by the until
6413 until_break_command_continuation (void *arg
)
6415 struct until_break_command_continuation_args
*a
= arg
;
6417 delete_breakpoint (a
->breakpoint
);
6419 delete_breakpoint (a
->breakpoint2
);
6423 until_break_command (char *arg
, int from_tty
, int anywhere
)
6425 struct symtabs_and_lines sals
;
6426 struct symtab_and_line sal
;
6427 struct frame_info
*frame
= get_selected_frame (NULL
);
6428 struct frame_info
*prev_frame
= get_prev_frame (frame
);
6429 struct breakpoint
*breakpoint
;
6430 struct breakpoint
*breakpoint2
= NULL
;
6431 struct cleanup
*old_chain
;
6433 clear_proceed_status ();
6435 /* Set a breakpoint where the user wants it and at return from
6438 if (default_breakpoint_valid
)
6439 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
6440 default_breakpoint_line
, (char ***) NULL
, NULL
);
6442 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
6443 0, (char ***) NULL
, NULL
);
6445 if (sals
.nelts
!= 1)
6446 error (_("Couldn't get information on specified line."));
6449 xfree (sals
.sals
); /* malloc'd, so freed */
6452 error (_("Junk at end of arguments."));
6454 resolve_sal_pc (&sal
);
6457 /* If the user told us to continue until a specified location,
6458 we don't specify a frame at which we need to stop. */
6459 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
6461 /* Otherwise, specify the current frame, because we want to stop only
6462 at the very same frame. */
6463 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (frame
),
6466 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
6468 /* Keep within the current frame, or in frames called by the current
6472 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
6473 sal
.pc
= get_frame_pc (prev_frame
);
6474 breakpoint2
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
6476 make_cleanup_delete_breakpoint (breakpoint2
);
6479 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
6481 /* If we are running asynchronously, and proceed call above has actually
6482 managed to start the target, arrange for breakpoints to be
6483 deleted when the target stops. Otherwise, we're already stopped and
6484 delete breakpoints via cleanup chain. */
6486 if (target_can_async_p () && is_running (inferior_ptid
))
6488 struct until_break_command_continuation_args
*args
;
6489 args
= xmalloc (sizeof (*args
));
6491 args
->breakpoint
= breakpoint
;
6492 args
->breakpoint2
= breakpoint2
;
6494 discard_cleanups (old_chain
);
6495 add_continuation (inferior_thread (),
6496 until_break_command_continuation
, args
,
6500 do_cleanups (old_chain
);
6504 ep_skip_leading_whitespace (char **s
)
6506 if ((s
== NULL
) || (*s
== NULL
))
6508 while (isspace (**s
))
6512 /* This function attempts to parse an optional "if <cond>" clause
6513 from the arg string. If one is not found, it returns NULL.
6515 Else, it returns a pointer to the condition string. (It does not
6516 attempt to evaluate the string against a particular block.) And,
6517 it updates arg to point to the first character following the parsed
6518 if clause in the arg string. */
6521 ep_parse_optional_if_clause (char **arg
)
6525 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
6528 /* Skip the "if" keyword. */
6531 /* Skip any extra leading whitespace, and record the start of the
6532 condition string. */
6533 ep_skip_leading_whitespace (arg
);
6536 /* Assume that the condition occupies the remainder of the arg string. */
6537 (*arg
) += strlen (cond_string
);
6542 /* This function attempts to parse an optional filename from the arg
6543 string. If one is not found, it returns NULL.
6545 Else, it returns a pointer to the parsed filename. (This function
6546 makes no attempt to verify that a file of that name exists, or is
6547 accessible.) And, it updates arg to point to the first character
6548 following the parsed filename in the arg string.
6550 Note that clients needing to preserve the returned filename for
6551 future access should copy it to their own buffers. */
6553 ep_parse_optional_filename (char **arg
)
6555 static char filename
[1024];
6560 if ((*arg_p
== '\0') || isspace (*arg_p
))
6578 /* Commands to deal with catching events, such as signals, exceptions,
6579 process start/exit, etc. */
6583 catch_fork_temporary
, catch_vfork_temporary
,
6584 catch_fork_permanent
, catch_vfork_permanent
6589 catch_fork_command_1 (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6591 char *cond_string
= NULL
;
6592 catch_fork_kind fork_kind
;
6595 fork_kind
= (catch_fork_kind
) (uintptr_t) get_cmd_context (command
);
6596 tempflag
= (fork_kind
== catch_fork_temporary
6597 || fork_kind
== catch_vfork_temporary
);
6601 ep_skip_leading_whitespace (&arg
);
6603 /* The allowed syntax is:
6605 catch [v]fork if <cond>
6607 First, check if there's an if clause. */
6608 cond_string
= ep_parse_optional_if_clause (&arg
);
6610 if ((*arg
!= '\0') && !isspace (*arg
))
6611 error (_("Junk at end of arguments."));
6613 /* If this target supports it, create a fork or vfork catchpoint
6614 and enable reporting of such events. */
6617 case catch_fork_temporary
:
6618 case catch_fork_permanent
:
6619 create_fork_vfork_event_catchpoint (tempflag
, cond_string
,
6620 &catch_fork_breakpoint_ops
);
6622 case catch_vfork_temporary
:
6623 case catch_vfork_permanent
:
6624 create_fork_vfork_event_catchpoint (tempflag
, cond_string
,
6625 &catch_vfork_breakpoint_ops
);
6628 error (_("unsupported or unknown fork kind; cannot catch it"));
6634 catch_exec_command_1 (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6637 char *cond_string
= NULL
;
6639 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6643 ep_skip_leading_whitespace (&arg
);
6645 /* The allowed syntax is:
6647 catch exec if <cond>
6649 First, check if there's an if clause. */
6650 cond_string
= ep_parse_optional_if_clause (&arg
);
6652 if ((*arg
!= '\0') && !isspace (*arg
))
6653 error (_("Junk at end of arguments."));
6655 /* If this target supports it, create an exec catchpoint
6656 and enable reporting of such events. */
6657 create_catchpoint (tempflag
, cond_string
, &catch_exec_breakpoint_ops
);
6660 static enum print_stop_action
6661 print_exception_catchpoint (struct breakpoint
*b
)
6663 int bp_temp
, bp_throw
;
6665 annotate_catchpoint (b
->number
);
6667 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6668 if (b
->loc
->address
!= b
->loc
->requested_address
)
6669 breakpoint_adjustment_warning (b
->loc
->requested_address
,
6672 bp_temp
= b
->disposition
== disp_del
;
6674 bp_temp
? "Temporary catchpoint "
6676 if (!ui_out_is_mi_like_p (uiout
))
6677 ui_out_field_int (uiout
, "bkptno", b
->number
);
6679 bp_throw
? " (exception thrown), "
6680 : " (exception caught), ");
6681 if (ui_out_is_mi_like_p (uiout
))
6683 ui_out_field_string (uiout
, "reason",
6684 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
6685 ui_out_field_string (uiout
, "disp", bpdisp_text (b
->disposition
));
6686 ui_out_field_int (uiout
, "bkptno", b
->number
);
6688 return PRINT_SRC_AND_LOC
;
6692 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6694 struct value_print_options opts
;
6695 get_user_print_options (&opts
);
6696 if (opts
.addressprint
)
6699 if (b
->loc
== NULL
|| b
->loc
->shlib_disabled
)
6700 ui_out_field_string (uiout
, "addr", "<PENDING>");
6702 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6706 *last_addr
= b
->loc
->address
;
6707 if (strstr (b
->addr_string
, "throw") != NULL
)
6708 ui_out_field_string (uiout
, "what", "exception throw");
6710 ui_out_field_string (uiout
, "what", "exception catch");
6714 print_mention_exception_catchpoint (struct breakpoint
*b
)
6719 bp_temp
= b
->disposition
== disp_del
;
6720 bp_throw
= strstr (b
->addr_string
, "throw") != NULL
;
6721 ui_out_text (uiout
, bp_temp
? _("Temporary catchpoint ")
6722 : _("Catchpoint "));
6723 ui_out_field_int (uiout
, "bkptno", b
->number
);
6724 ui_out_text (uiout
, bp_throw
? _(" (throw)")
6728 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6731 NULL
, /* breakpoint_hit */
6732 print_exception_catchpoint
,
6733 print_one_exception_catchpoint
,
6734 print_mention_exception_catchpoint
6738 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6739 enum exception_event_kind ex_event
, int from_tty
)
6741 char *trigger_func_name
;
6743 if (ex_event
== EX_EVENT_CATCH
)
6744 trigger_func_name
= "__cxa_begin_catch";
6746 trigger_func_name
= "__cxa_throw";
6748 break_command_really (trigger_func_name
, cond_string
, -1,
6749 0 /* condition and thread are valid. */,
6752 AUTO_BOOLEAN_TRUE
/* pending */,
6753 &gnu_v3_exception_catchpoint_ops
, from_tty
,
6759 /* Deal with "catch catch" and "catch throw" commands */
6762 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6763 int tempflag
, int from_tty
)
6765 char *cond_string
= NULL
;
6766 struct symtab_and_line
*sal
= NULL
;
6770 ep_skip_leading_whitespace (&arg
);
6772 cond_string
= ep_parse_optional_if_clause (&arg
);
6774 if ((*arg
!= '\0') && !isspace (*arg
))
6775 error (_("Junk at end of arguments."));
6777 if ((ex_event
!= EX_EVENT_THROW
) &&
6778 (ex_event
!= EX_EVENT_CATCH
))
6779 error (_("Unsupported or unknown exception event; cannot catch it"));
6781 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6784 warning (_("Unsupported with this platform/compiler combination."));
6787 /* Implementation of "catch catch" command. */
6790 catch_catch_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6792 int tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6793 catch_exception_command_1 (EX_EVENT_CATCH
, arg
, tempflag
, from_tty
);
6796 /* Implementation of "catch throw" command. */
6799 catch_throw_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6801 int tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6802 catch_exception_command_1 (EX_EVENT_THROW
, arg
, tempflag
, from_tty
);
6805 /* Create a breakpoint struct for Ada exception catchpoints. */
6808 create_ada_exception_breakpoint (struct symtab_and_line sal
,
6812 struct expression
*cond
,
6813 struct breakpoint_ops
*ops
,
6817 struct breakpoint
*b
;
6821 describe_other_breakpoints (sal
.pc
, sal
.section
, -1);
6822 /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
6823 version for exception catchpoints, because two catchpoints
6824 used for different exception names will use the same address.
6825 In this case, a "breakpoint ... also set at..." warning is
6826 unproductive. Besides. the warning phrasing is also a bit
6827 inapropriate, we should use the word catchpoint, and tell
6828 the user what type of catchpoint it is. The above is good
6829 enough for now, though. */
6832 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6833 set_breakpoint_count (breakpoint_count
+ 1);
6835 b
->enable_state
= bp_enabled
;
6836 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6837 b
->number
= breakpoint_count
;
6838 b
->ignore_count
= 0;
6839 b
->loc
->cond
= cond
;
6840 b
->addr_string
= addr_string
;
6841 b
->language
= language_ada
;
6842 b
->cond_string
= cond_string
;
6843 b
->exp_string
= exp_string
;
6848 update_global_location_list (1);
6851 /* Implement the "catch exception" command. */
6854 catch_ada_exception_command (char *arg
, int from_tty
,
6855 struct cmd_list_element
*command
)
6858 struct symtab_and_line sal
;
6860 char *addr_string
= NULL
;
6861 char *exp_string
= NULL
;
6862 char *cond_string
= NULL
;
6863 struct expression
*cond
= NULL
;
6864 struct breakpoint_ops
*ops
= NULL
;
6866 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6870 sal
= ada_decode_exception_location (arg
, &addr_string
, &exp_string
,
6871 &cond_string
, &cond
, &ops
);
6872 create_ada_exception_breakpoint (sal
, addr_string
, exp_string
,
6873 cond_string
, cond
, ops
, tempflag
,
6877 /* Implement the "catch assert" command. */
6880 catch_assert_command (char *arg
, int from_tty
, struct cmd_list_element
*command
)
6883 struct symtab_and_line sal
;
6884 char *addr_string
= NULL
;
6885 struct breakpoint_ops
*ops
= NULL
;
6887 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
6891 sal
= ada_decode_assert_location (arg
, &addr_string
, &ops
);
6892 create_ada_exception_breakpoint (sal
, addr_string
, NULL
, NULL
, NULL
, ops
,
6893 tempflag
, from_tty
);
6897 catch_command (char *arg
, int from_tty
)
6899 error (_("Catch requires an event name."));
6904 tcatch_command (char *arg
, int from_tty
)
6906 error (_("Catch requires an event name."));
6909 /* Delete breakpoints by address or line. */
6912 clear_command (char *arg
, int from_tty
)
6914 struct breakpoint
*b
;
6915 VEC(breakpoint_p
) *found
= 0;
6918 struct symtabs_and_lines sals
;
6919 struct symtab_and_line sal
;
6924 sals
= decode_line_spec (arg
, 1);
6929 sals
.sals
= (struct symtab_and_line
*)
6930 xmalloc (sizeof (struct symtab_and_line
));
6931 make_cleanup (xfree
, sals
.sals
);
6932 init_sal (&sal
); /* initialize to zeroes */
6933 sal
.line
= default_breakpoint_line
;
6934 sal
.symtab
= default_breakpoint_symtab
;
6935 sal
.pc
= default_breakpoint_address
;
6936 if (sal
.symtab
== 0)
6937 error (_("No source file specified."));
6945 /* We don't call resolve_sal_pc here. That's not
6946 as bad as it seems, because all existing breakpoints
6947 typically have both file/line and pc set. So, if
6948 clear is given file/line, we can match this to existing
6949 breakpoint without obtaining pc at all.
6951 We only support clearing given the address explicitly
6952 present in breakpoint table. Say, we've set breakpoint
6953 at file:line. There were several PC values for that file:line,
6954 due to optimization, all in one block.
6955 We've picked one PC value. If "clear" is issued with another
6956 PC corresponding to the same file:line, the breakpoint won't
6957 be cleared. We probably can still clear the breakpoint, but
6958 since the other PC value is never presented to user, user
6959 can only find it by guessing, and it does not seem important
6962 /* For each line spec given, delete bps which correspond
6963 to it. Do it in two passes, solely to preserve the current
6964 behavior that from_tty is forced true if we delete more than
6968 for (i
= 0; i
< sals
.nelts
; i
++)
6970 /* If exact pc given, clear bpts at that pc.
6971 If line given (pc == 0), clear all bpts on specified line.
6972 If defaulting, clear all bpts on default line
6975 defaulting sal.pc != 0 tests to do
6980 1 0 <can't happen> */
6984 /* Find all matching breakpoints and add them to
6989 /* Are we going to delete b? */
6990 if (b
->type
!= bp_none
6991 && b
->type
!= bp_watchpoint
6992 && b
->type
!= bp_hardware_watchpoint
6993 && b
->type
!= bp_read_watchpoint
6994 && b
->type
!= bp_access_watchpoint
)
6996 struct bp_location
*loc
= b
->loc
;
6997 for (; loc
; loc
= loc
->next
)
6999 int pc_match
= sal
.pc
7000 && (loc
->address
== sal
.pc
)
7001 && (!section_is_overlay (loc
->section
)
7002 || loc
->section
== sal
.section
);
7003 int line_match
= ((default_match
|| (0 == sal
.pc
))
7004 && b
->source_file
!= NULL
7005 && sal
.symtab
!= NULL
7006 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
7007 && b
->line_number
== sal
.line
);
7008 if (pc_match
|| line_match
)
7017 VEC_safe_push(breakpoint_p
, found
, b
);
7020 /* Now go thru the 'found' chain and delete them. */
7021 if (VEC_empty(breakpoint_p
, found
))
7024 error (_("No breakpoint at %s."), arg
);
7026 error (_("No breakpoint at this line."));
7029 if (VEC_length(breakpoint_p
, found
) > 1)
7030 from_tty
= 1; /* Always report if deleted more than one */
7033 if (VEC_length(breakpoint_p
, found
) == 1)
7034 printf_unfiltered (_("Deleted breakpoint "));
7036 printf_unfiltered (_("Deleted breakpoints "));
7038 breakpoints_changed ();
7040 for (ix
= 0; VEC_iterate(breakpoint_p
, found
, ix
, b
); ix
++)
7043 printf_unfiltered ("%d ", b
->number
);
7044 delete_breakpoint (b
);
7047 putchar_unfiltered ('\n');
7050 /* Delete breakpoint in BS if they are `delete' breakpoints and
7051 all breakpoints that are marked for deletion, whether hit or not.
7052 This is called after any breakpoint is hit, or after errors. */
7055 breakpoint_auto_delete (bpstat bs
)
7057 struct breakpoint
*b
, *temp
;
7059 for (; bs
; bs
= bs
->next
)
7060 if (bs
->breakpoint_at
7061 && bs
->breakpoint_at
->owner
7062 && bs
->breakpoint_at
->owner
->disposition
== disp_del
7064 delete_breakpoint (bs
->breakpoint_at
->owner
);
7066 ALL_BREAKPOINTS_SAFE (b
, temp
)
7068 if (b
->disposition
== disp_del_at_next_stop
)
7069 delete_breakpoint (b
);
7073 /* A cleanup function which destroys a vector. */
7076 do_vec_free (void *p
)
7078 VEC(bp_location_p
) **vec
= p
;
7080 VEC_free (bp_location_p
, *vec
);
7083 /* If SHOULD_INSERT is false, do not insert any breakpoint locations
7084 into the inferior, only remove already-inserted locations that no
7085 longer should be inserted. Functions that delete a breakpoint or
7086 breakpoints should pass false, so that deleting a breakpoint
7087 doesn't have the side effect of inserting the locations of other
7088 breakpoints that are marked not-inserted, but should_be_inserted
7089 returns true on them.
7091 This behaviour is useful is situations close to tear-down -- e.g.,
7092 after an exec, while the target still has execution, but breakpoint
7093 shadows of the previous executable image should *NOT* be restored
7094 to the new image; or before detaching, where the target still has
7095 execution and wants to delete breakpoints from GDB's lists, and all
7096 breakpoints had already been removed from the inferior. */
7099 update_global_location_list (int should_insert
)
7101 struct breakpoint
*b
;
7102 struct bp_location
**next
= &bp_location_chain
;
7103 struct bp_location
*loc
;
7104 struct bp_location
*loc2
;
7105 VEC(bp_location_p
) *old_locations
= NULL
;
7108 struct cleanup
*cleanups
;
7110 cleanups
= make_cleanup (do_vec_free
, &old_locations
);
7111 /* Store old locations for future reference. */
7112 for (loc
= bp_location_chain
; loc
; loc
= loc
->global_next
)
7113 VEC_safe_push (bp_location_p
, old_locations
, loc
);
7115 bp_location_chain
= NULL
;
7118 for (loc
= b
->loc
; loc
; loc
= loc
->next
)
7121 next
= &(loc
->global_next
);
7126 /* Identify bp_location instances that are no longer present in the new
7127 list, and therefore should be freed. Note that it's not necessary that
7128 those locations should be removed from inferior -- if there's another
7129 location at the same address (previously marked as duplicate),
7130 we don't need to remove/insert the location. */
7131 for (ix
= 0; VEC_iterate(bp_location_p
, old_locations
, ix
, loc
); ++ix
)
7133 /* Tells if 'loc' is found amoung the new locations. If not, we
7135 int found_object
= 0;
7136 /* Tells if the location should remain inserted in the target. */
7137 int keep_in_target
= 0;
7139 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
7146 /* If this location is no longer present, and inserted, look if there's
7147 maybe a new location at the same address. If so, mark that one
7148 inserted, and don't remove this one. This is needed so that we
7149 don't have a time window where a breakpoint at certain location is not
7154 /* If the location is inserted now, we might have to remove it. */
7156 if (found_object
&& should_be_inserted (loc
))
7158 /* The location is still present in the location list, and still
7159 should be inserted. Don't do anything. */
7164 /* The location is either no longer present, or got disabled.
7165 See if there's another location at the same address, in which
7166 case we don't need to remove this one from the target. */
7167 if (breakpoint_address_is_meaningful (loc
->owner
))
7168 for (loc2
= bp_location_chain
; loc2
; loc2
= loc2
->global_next
)
7170 /* For the sake of should_insert_location. The
7171 call to check_duplicates will fix up this later. */
7172 loc2
->duplicate
= 0;
7173 if (should_be_inserted (loc2
)
7174 && loc2
!= loc
&& loc2
->address
== loc
->address
)
7177 loc2
->target_info
= loc
->target_info
;
7184 if (!keep_in_target
)
7186 if (remove_breakpoint (loc
, mark_uninserted
))
7188 /* This is just about all we can do. We could keep this
7189 location on the global list, and try to remove it next
7190 time, but there's no particular reason why we will
7193 Note that at this point, loc->owner is still valid,
7194 as delete_breakpoint frees the breakpoint only
7195 after calling us. */
7196 printf_filtered (_("warning: Error removing breakpoint %d\n"),
7197 loc
->owner
->number
);
7205 if (removed
&& non_stop
)
7207 /* This location was removed from the targets. In non-stop mode,
7208 a race condition is possible where we've removed a breakpoint,
7209 but stop events for that breakpoint are already queued and will
7210 arrive later. To suppress spurious SIGTRAPs reported to user,
7211 we keep this breakpoint location for a bit, and will retire it
7212 after we see 3 * thread_count events.
7213 The theory here is that reporting of events should,
7214 "on the average", be fair, so after that many event we'll see
7215 events from all threads that have anything of interest, and no
7216 longer need to keep this breakpoint. This is just a
7217 heuristic, but if it's wrong, we'll report unexpected SIGTRAP,
7218 which is usability issue, but not a correctness problem. */
7219 loc
->events_till_retirement
= 3 * (thread_count () + 1);
7222 VEC_safe_push (bp_location_p
, moribund_locations
, loc
);
7225 free_bp_location (loc
);
7231 check_duplicates (b
);
7234 if (breakpoints_always_inserted_mode () && should_insert
7235 && (target_has_execution
7236 || (gdbarch_has_global_breakpoints (target_gdbarch
))))
7237 insert_breakpoint_locations ();
7239 do_cleanups (cleanups
);
7243 breakpoint_retire_moribund (void)
7245 struct bp_location
*loc
;
7248 for (ix
= 0; VEC_iterate (bp_location_p
, moribund_locations
, ix
, loc
); ++ix
)
7249 if (--(loc
->events_till_retirement
) == 0)
7251 free_bp_location (loc
);
7252 VEC_unordered_remove (bp_location_p
, moribund_locations
, ix
);
7258 update_global_location_list_nothrow (int inserting
)
7260 struct gdb_exception e
;
7261 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7262 update_global_location_list (inserting
);
7265 /* Clear BPT from a BPS. */
7267 bpstat_remove_breakpoint (bpstat bps
, struct breakpoint
*bpt
)
7270 for (bs
= bps
; bs
; bs
= bs
->next
)
7271 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->owner
== bpt
)
7273 bs
->breakpoint_at
= NULL
;
7275 /* bs->commands will be freed later. */
7279 /* Callback for iterate_over_threads. */
7281 bpstat_remove_breakpoint_callback (struct thread_info
*th
, void *data
)
7283 struct breakpoint
*bpt
= data
;
7284 bpstat_remove_breakpoint (th
->stop_bpstat
, bpt
);
7288 /* Delete a breakpoint and clean up all traces of it in the data
7292 delete_breakpoint (struct breakpoint
*bpt
)
7294 struct breakpoint
*b
;
7295 struct bp_location
*loc
, *next
;
7297 gdb_assert (bpt
!= NULL
);
7299 /* Has this bp already been deleted? This can happen because multiple
7300 lists can hold pointers to bp's. bpstat lists are especial culprits.
7302 One example of this happening is a watchpoint's scope bp. When the
7303 scope bp triggers, we notice that the watchpoint is out of scope, and
7304 delete it. We also delete its scope bp. But the scope bp is marked
7305 "auto-deleting", and is already on a bpstat. That bpstat is then
7306 checked for auto-deleting bp's, which are deleted.
7308 A real solution to this problem might involve reference counts in bp's,
7309 and/or giving them pointers back to their referencing bpstat's, and
7310 teaching delete_breakpoint to only free a bp's storage when no more
7311 references were extent. A cheaper bandaid was chosen. */
7312 if (bpt
->type
== bp_none
)
7315 observer_notify_breakpoint_deleted (bpt
->number
);
7317 if (breakpoint_chain
== bpt
)
7318 breakpoint_chain
= bpt
->next
;
7323 b
->next
= bpt
->next
;
7327 free_command_lines (&bpt
->commands
);
7328 if (bpt
->cond_string
!= NULL
)
7329 xfree (bpt
->cond_string
);
7330 if (bpt
->addr_string
!= NULL
)
7331 xfree (bpt
->addr_string
);
7332 if (bpt
->exp
!= NULL
)
7334 if (bpt
->exp_string
!= NULL
)
7335 xfree (bpt
->exp_string
);
7336 if (bpt
->val
!= NULL
)
7337 value_free (bpt
->val
);
7338 if (bpt
->source_file
!= NULL
)
7339 xfree (bpt
->source_file
);
7340 if (bpt
->exec_pathname
!= NULL
)
7341 xfree (bpt
->exec_pathname
);
7343 /* Be sure no bpstat's are pointing at it after it's been freed. */
7344 /* FIXME, how can we find all bpstat's?
7345 We just check stop_bpstat for now. Note that we cannot just
7346 remove bpstats pointing at bpt from the stop_bpstat list
7347 entirely, as breakpoint commands are associated with the bpstat;
7348 if we remove it here, then the later call to
7349 bpstat_do_actions (&stop_bpstat);
7350 in event-top.c won't do anything, and temporary breakpoints
7351 with commands won't work. */
7353 iterate_over_threads (bpstat_remove_breakpoint_callback
, bpt
);
7355 /* Now that breakpoint is removed from breakpoint
7356 list, update the global location list. This
7357 will remove locations that used to belong to
7358 this breakpoint. Do this before freeing
7359 the breakpoint itself, since remove_breakpoint
7360 looks at location's owner. It might be better
7361 design to have location completely self-contained,
7362 but it's not the case now. */
7363 update_global_location_list (0);
7366 /* On the chance that someone will soon try again to delete this same
7367 bp, we mark it as deleted before freeing its storage. */
7368 bpt
->type
= bp_none
;
7374 do_delete_breakpoint_cleanup (void *b
)
7376 delete_breakpoint (b
);
7380 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
7382 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
7386 delete_command (char *arg
, int from_tty
)
7388 struct breakpoint
*b
, *temp
;
7394 int breaks_to_delete
= 0;
7396 /* Delete all breakpoints if no argument.
7397 Do not delete internal or call-dummy breakpoints, these
7398 have to be deleted with an explicit breakpoint number argument. */
7401 if (b
->type
!= bp_call_dummy
&&
7402 b
->type
!= bp_shlib_event
&&
7403 b
->type
!= bp_thread_event
&&
7404 b
->type
!= bp_overlay_event
&&
7407 breaks_to_delete
= 1;
7412 /* Ask user only if there are some breakpoints to delete. */
7414 || (breaks_to_delete
&& query (_("Delete all breakpoints? "))))
7416 ALL_BREAKPOINTS_SAFE (b
, temp
)
7418 if (b
->type
!= bp_call_dummy
&&
7419 b
->type
!= bp_shlib_event
&&
7420 b
->type
!= bp_thread_event
&&
7421 b
->type
!= bp_overlay_event
&&
7423 delete_breakpoint (b
);
7428 map_breakpoint_numbers (arg
, delete_breakpoint
);
7432 all_locations_are_pending (struct bp_location
*loc
)
7434 for (; loc
; loc
= loc
->next
)
7435 if (!loc
->shlib_disabled
)
7440 /* Subroutine of update_breakpoint_locations to simplify it.
7441 Return non-zero if multiple fns in list LOC have the same name.
7442 Null names are ignored. */
7445 ambiguous_names_p (struct bp_location
*loc
)
7447 struct bp_location
*l
;
7448 htab_t htab
= htab_create_alloc (13, htab_hash_string
,
7449 (int (*) (const void *, const void *)) streq
,
7450 NULL
, xcalloc
, xfree
);
7452 for (l
= loc
; l
!= NULL
; l
= l
->next
)
7455 const char *name
= l
->function_name
;
7457 /* Allow for some names to be NULL, ignore them. */
7461 slot
= (const char **) htab_find_slot (htab
, (const void *) name
,
7463 /* NOTE: We can assume slot != NULL here because xcalloc never returns
7478 update_breakpoint_locations (struct breakpoint
*b
,
7479 struct symtabs_and_lines sals
)
7483 struct bp_location
*existing_locations
= b
->loc
;
7485 /* If there's no new locations, and all existing locations
7486 are pending, don't do anything. This optimizes
7487 the common case where all locations are in the same
7488 shared library, that was unloaded. We'd like to
7489 retain the location, so that when the library
7490 is loaded again, we don't loose the enabled/disabled
7491 status of the individual locations. */
7492 if (all_locations_are_pending (existing_locations
) && sals
.nelts
== 0)
7497 for (i
= 0; i
< sals
.nelts
; ++i
)
7499 struct bp_location
*new_loc
=
7500 add_location_to_breakpoint (b
, &(sals
.sals
[i
]));
7502 /* Reparse conditions, they might contain references to the
7504 if (b
->cond_string
!= NULL
)
7506 struct gdb_exception e
;
7509 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7511 new_loc
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
),
7516 warning (_("failed to reevaluate condition for breakpoint %d: %s"),
7517 b
->number
, e
.message
);
7518 new_loc
->enabled
= 0;
7522 if (b
->source_file
!= NULL
)
7523 xfree (b
->source_file
);
7524 if (sals
.sals
[i
].symtab
== NULL
)
7525 b
->source_file
= NULL
;
7527 b
->source_file
= xstrdup (sals
.sals
[i
].symtab
->filename
);
7529 if (b
->line_number
== 0)
7530 b
->line_number
= sals
.sals
[i
].line
;
7533 /* Update locations of permanent breakpoints. */
7534 if (b
->enable_state
== bp_permanent
)
7535 make_breakpoint_permanent (b
);
7537 /* If possible, carry over 'disable' status from existing breakpoints. */
7539 struct bp_location
*e
= existing_locations
;
7540 /* If there are multiple breakpoints with the same function name,
7541 e.g. for inline functions, comparing function names won't work.
7542 Instead compare pc addresses; this is just a heuristic as things
7543 may have moved, but in practice it gives the correct answer
7544 often enough until a better solution is found. */
7545 int have_ambiguous_names
= ambiguous_names_p (b
->loc
);
7547 for (; e
; e
= e
->next
)
7549 if (!e
->enabled
&& e
->function_name
)
7551 struct bp_location
*l
= b
->loc
;
7552 if (have_ambiguous_names
)
7554 for (; l
; l
= l
->next
)
7555 if (e
->address
== l
->address
)
7563 for (; l
; l
= l
->next
)
7564 if (l
->function_name
7565 && strcmp (e
->function_name
, l
->function_name
) == 0)
7575 update_global_location_list (1);
7579 /* Reset a breakpoint given it's struct breakpoint * BINT.
7580 The value we return ends up being the return value from catch_errors.
7581 Unused in this case. */
7584 breakpoint_re_set_one (void *bint
)
7586 /* get past catch_errs */
7587 struct breakpoint
*b
= (struct breakpoint
*) bint
;
7591 int *not_found_ptr
= ¬_found
;
7592 struct symtabs_and_lines sals
= {};
7593 struct symtabs_and_lines expanded
;
7595 enum enable_state save_enable
;
7596 struct gdb_exception e
;
7597 struct cleanup
*cleanups
;
7602 warning (_("attempted to reset apparently deleted breakpoint #%d?"),
7606 case bp_hardware_breakpoint
:
7608 if (b
->addr_string
== NULL
)
7610 /* Anything without a string can't be re-set. */
7611 delete_breakpoint (b
);
7615 set_language (b
->language
);
7616 input_radix
= b
->input_radix
;
7618 TRY_CATCH (e
, RETURN_MASK_ERROR
)
7620 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
,
7625 int not_found_and_ok
= 0;
7626 /* For pending breakpoints, it's expected that parsing
7627 will fail until the right shared library is loaded.
7628 User has already told to create pending breakpoints and
7629 don't need extra messages. If breakpoint is in bp_shlib_disabled
7630 state, then user already saw the message about that breakpoint
7631 being disabled, and don't want to see more errors. */
7633 && (b
->condition_not_parsed
7634 || (b
->loc
&& b
->loc
->shlib_disabled
)
7635 || b
->enable_state
== bp_disabled
))
7636 not_found_and_ok
= 1;
7638 if (!not_found_and_ok
)
7640 /* We surely don't want to warn about the same breakpoint
7641 10 times. One solution, implemented here, is disable
7642 the breakpoint on error. Another solution would be to
7643 have separate 'warning emitted' flag. Since this
7644 happens only when a binary has changed, I don't know
7645 which approach is better. */
7646 b
->enable_state
= bp_disabled
;
7647 throw_exception (e
);
7654 gdb_assert (sals
.nelts
== 1);
7655 resolve_sal_pc (&sals
.sals
[0]);
7656 if (b
->condition_not_parsed
&& s
&& s
[0])
7658 char *cond_string
= 0;
7662 find_condition_and_thread (s
, sals
.sals
[0].pc
,
7663 &cond_string
, &thread
, &task
);
7665 b
->cond_string
= cond_string
;
7668 b
->condition_not_parsed
= 0;
7670 expanded
= expand_line_sal_maybe (sals
.sals
[0]);
7671 cleanups
= make_cleanup (xfree
, sals
.sals
);
7672 update_breakpoint_locations (b
, expanded
);
7673 do_cleanups (cleanups
);
7677 case bp_hardware_watchpoint
:
7678 case bp_read_watchpoint
:
7679 case bp_access_watchpoint
:
7680 /* Watchpoint can be either on expression using entirely global variables,
7681 or it can be on local variables.
7683 Watchpoints of the first kind are never auto-deleted, and even persist
7684 across program restarts. Since they can use variables from shared
7685 libraries, we need to reparse expression as libraries are loaded
7688 Watchpoints on local variables can also change meaning as result
7689 of solib event. For example, if a watchpoint uses both a local and
7690 a global variables in expression, it's a local watchpoint, but
7691 unloading of a shared library will make the expression invalid.
7692 This is not a very common use case, but we still re-evaluate
7693 expression, to avoid surprises to the user.
7695 Note that for local watchpoints, we re-evaluate it only if
7696 watchpoints frame id is still valid. If it's not, it means
7697 the watchpoint is out of scope and will be deleted soon. In fact,
7698 I'm not sure we'll ever be called in this case.
7700 If a local watchpoint's frame id is still valid, then
7701 b->exp_valid_block is likewise valid, and we can safely use it.
7703 Don't do anything about disabled watchpoints, since they will
7704 be reevaluated again when enabled. */
7705 update_watchpoint (b
, 1 /* reparse */);
7707 /* We needn't really do anything to reset these, since the mask
7708 that requests them is unaffected by e.g., new libraries being
7714 printf_filtered (_("Deleting unknown breakpoint type %d\n"), b
->type
);
7716 /* Delete overlay event breakpoints; they will be reset later by
7717 breakpoint_re_set. */
7718 case bp_overlay_event
:
7719 delete_breakpoint (b
);
7722 /* This breakpoint is special, it's set up when the inferior
7723 starts and we really don't want to touch it. */
7724 case bp_shlib_event
:
7726 /* Like bp_shlib_event, this breakpoint type is special.
7727 Once it is set up, we do not want to touch it. */
7728 case bp_thread_event
:
7730 /* Keep temporary breakpoints, which can be encountered when we step
7731 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7732 Otherwise these should have been blown away via the cleanup chain
7733 or by breakpoint_init_inferior when we rerun the executable. */
7736 case bp_watchpoint_scope
:
7738 case bp_step_resume
:
7740 case bp_longjmp_resume
:
7747 /* Re-set all breakpoints after symbols have been re-loaded.
7749 If OBJFILE is non-null, create overlay break point only in OBJFILE
7750 (speed optimization). Otherwise rescan all loaded objfiles. */
7753 breakpoint_re_set_objfile (struct objfile
*objfile
)
7755 struct breakpoint
*b
, *temp
;
7756 enum language save_language
;
7757 int save_input_radix
;
7759 save_language
= current_language
->la_language
;
7760 save_input_radix
= input_radix
;
7761 ALL_BREAKPOINTS_SAFE (b
, temp
)
7763 /* Format possible error msg */
7764 char *message
= xstrprintf ("Error in re-setting breakpoint %d: ",
7766 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7767 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7768 do_cleanups (cleanups
);
7770 set_language (save_language
);
7771 input_radix
= save_input_radix
;
7773 if (objfile
== NULL
)
7774 ALL_OBJFILES (objfile
)
7775 create_overlay_event_breakpoint ("_ovly_debug_event", objfile
);
7777 create_overlay_event_breakpoint ("_ovly_debug_event", objfile
);
7780 /* Re-set all breakpoints after symbols have been re-loaded. */
7783 breakpoint_re_set (void)
7785 breakpoint_re_set_objfile (NULL
);
7788 /* Reset the thread number of this breakpoint:
7790 - If the breakpoint is for all threads, leave it as-is.
7791 - Else, reset it to the current thread for inferior_ptid. */
7793 breakpoint_re_set_thread (struct breakpoint
*b
)
7795 if (b
->thread
!= -1)
7797 if (in_thread_list (inferior_ptid
))
7798 b
->thread
= pid_to_thread_id (inferior_ptid
);
7802 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7803 If from_tty is nonzero, it prints a message to that effect,
7804 which ends with a period (no newline). */
7807 set_ignore_count (int bptnum
, int count
, int from_tty
)
7809 struct breakpoint
*b
;
7815 if (b
->number
== bptnum
)
7817 b
->ignore_count
= count
;
7821 printf_filtered (_("Will stop next time breakpoint %d is reached."),
7823 else if (count
== 1)
7824 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
7827 printf_filtered (_("Will ignore next %d crossings of breakpoint %d."),
7830 breakpoints_changed ();
7831 observer_notify_breakpoint_modified (b
->number
);
7835 error (_("No breakpoint number %d."), bptnum
);
7839 make_breakpoint_silent (struct breakpoint
*b
)
7841 /* Silence the breakpoint. */
7845 /* Command to set ignore-count of breakpoint N to COUNT. */
7848 ignore_command (char *args
, int from_tty
)
7854 error_no_arg (_("a breakpoint number"));
7856 num
= get_number (&p
);
7858 error (_("bad breakpoint number: '%s'"), args
);
7860 error (_("Second argument (specified ignore-count) is missing."));
7862 set_ignore_count (num
,
7863 longest_to_int (value_as_long (parse_and_eval (p
))),
7866 printf_filtered ("\n");
7869 /* Call FUNCTION on each of the breakpoints
7870 whose numbers are given in ARGS. */
7873 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7878 struct breakpoint
*b
, *tmp
;
7882 error_no_arg (_("one or more breakpoint numbers"));
7889 num
= get_number_or_range (&p1
);
7892 warning (_("bad breakpoint number at or near '%s'"), p
);
7896 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7897 if (b
->number
== num
)
7899 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7902 if (related_breakpoint
)
7903 function (related_breakpoint
);
7907 printf_unfiltered (_("No breakpoint number %d.\n"), num
);
7913 static struct bp_location
*
7914 find_location_by_number (char *number
)
7916 char *dot
= strchr (number
, '.');
7920 struct breakpoint
*b
;
7921 struct bp_location
*loc
;
7926 bp_num
= get_number_or_range (&p1
);
7928 error (_("Bad breakpoint number '%s'"), number
);
7931 if (b
->number
== bp_num
)
7936 if (!b
|| b
->number
!= bp_num
)
7937 error (_("Bad breakpoint number '%s'"), number
);
7940 loc_num
= get_number_or_range (&p1
);
7942 error (_("Bad breakpoint location number '%s'"), number
);
7946 for (;loc_num
&& loc
; --loc_num
, loc
= loc
->next
)
7949 error (_("Bad breakpoint location number '%s'"), dot
+1);
7955 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7956 If from_tty is nonzero, it prints a message to that effect,
7957 which ends with a period (no newline). */
7960 disable_breakpoint (struct breakpoint
*bpt
)
7962 /* Never disable a watchpoint scope breakpoint; we want to
7963 hit them when we leave scope so we can delete both the
7964 watchpoint and its scope breakpoint at that time. */
7965 if (bpt
->type
== bp_watchpoint_scope
)
7968 /* You can't disable permanent breakpoints. */
7969 if (bpt
->enable_state
== bp_permanent
)
7972 bpt
->enable_state
= bp_disabled
;
7974 update_global_location_list (0);
7976 observer_notify_breakpoint_modified (bpt
->number
);
7980 disable_command (char *args
, int from_tty
)
7982 struct breakpoint
*bpt
;
7984 ALL_BREAKPOINTS (bpt
)
7988 warning (_("attempted to disable apparently deleted breakpoint #%d?"),
7994 case bp_hardware_breakpoint
:
7996 case bp_hardware_watchpoint
:
7997 case bp_read_watchpoint
:
7998 case bp_access_watchpoint
:
7999 disable_breakpoint (bpt
);
8003 else if (strchr (args
, '.'))
8005 struct bp_location
*loc
= find_location_by_number (args
);
8008 update_global_location_list (0);
8011 map_breakpoint_numbers (args
, disable_breakpoint
);
8015 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
8017 int target_resources_ok
, other_type_used
;
8020 if (bpt
->type
== bp_hardware_breakpoint
)
8023 i
= hw_breakpoint_used_count ();
8024 target_resources_ok
=
8025 target_can_use_hardware_watchpoint (bp_hardware_breakpoint
,
8027 if (target_resources_ok
== 0)
8028 error (_("No hardware breakpoint support in the target."));
8029 else if (target_resources_ok
< 0)
8030 error (_("Hardware breakpoints used exceeds limit."));
8033 if (bpt
->type
== bp_watchpoint
||
8034 bpt
->type
== bp_hardware_watchpoint
||
8035 bpt
->type
== bp_read_watchpoint
||
8036 bpt
->type
== bp_access_watchpoint
)
8038 struct gdb_exception e
;
8040 TRY_CATCH (e
, RETURN_MASK_ALL
)
8042 update_watchpoint (bpt
, 1 /* reparse */);
8046 exception_fprintf (gdb_stderr
, e
, _("Cannot enable watchpoint %d: "),
8052 if (bpt
->enable_state
!= bp_permanent
)
8053 bpt
->enable_state
= bp_enabled
;
8054 bpt
->disposition
= disposition
;
8055 update_global_location_list (1);
8056 breakpoints_changed ();
8058 observer_notify_breakpoint_modified (bpt
->number
);
8063 enable_breakpoint (struct breakpoint
*bpt
)
8065 do_enable_breakpoint (bpt
, bpt
->disposition
);
8068 /* The enable command enables the specified breakpoints (or all defined
8069 breakpoints) so they once again become (or continue to be) effective
8070 in stopping the inferior. */
8073 enable_command (char *args
, int from_tty
)
8075 struct breakpoint
*bpt
;
8077 ALL_BREAKPOINTS (bpt
)
8081 warning (_("attempted to enable apparently deleted breakpoint #%d?"),
8087 case bp_hardware_breakpoint
:
8089 case bp_hardware_watchpoint
:
8090 case bp_read_watchpoint
:
8091 case bp_access_watchpoint
:
8092 enable_breakpoint (bpt
);
8096 else if (strchr (args
, '.'))
8098 struct bp_location
*loc
= find_location_by_number (args
);
8101 update_global_location_list (1);
8104 map_breakpoint_numbers (args
, enable_breakpoint
);
8108 enable_once_breakpoint (struct breakpoint
*bpt
)
8110 do_enable_breakpoint (bpt
, disp_disable
);
8114 enable_once_command (char *args
, int from_tty
)
8116 map_breakpoint_numbers (args
, enable_once_breakpoint
);
8120 enable_delete_breakpoint (struct breakpoint
*bpt
)
8122 do_enable_breakpoint (bpt
, disp_del
);
8126 enable_delete_command (char *args
, int from_tty
)
8128 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
8132 set_breakpoint_cmd (char *args
, int from_tty
)
8137 show_breakpoint_cmd (char *args
, int from_tty
)
8141 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
8143 struct symtabs_and_lines
8144 decode_line_spec_1 (char *string
, int funfirstline
)
8146 struct symtabs_and_lines sals
;
8148 error (_("Empty line specification."));
8149 if (default_breakpoint_valid
)
8150 sals
= decode_line_1 (&string
, funfirstline
,
8151 default_breakpoint_symtab
,
8152 default_breakpoint_line
,
8153 (char ***) NULL
, NULL
);
8155 sals
= decode_line_1 (&string
, funfirstline
,
8156 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
8158 error (_("Junk at end of line specification: %s"), string
);
8162 /* Create and insert a raw software breakpoint at PC. Return an
8163 identifier, which should be used to remove the breakpoint later.
8164 In general, places which call this should be using something on the
8165 breakpoint chain instead; this function should be eliminated
8169 deprecated_insert_raw_breakpoint (CORE_ADDR pc
)
8171 struct bp_target_info
*bp_tgt
;
8173 bp_tgt
= xmalloc (sizeof (struct bp_target_info
));
8174 memset (bp_tgt
, 0, sizeof (struct bp_target_info
));
8176 bp_tgt
->placed_address
= pc
;
8177 if (target_insert_breakpoint (bp_tgt
) != 0)
8179 /* Could not insert the breakpoint. */
8187 /* Remove a breakpoint BP inserted by deprecated_insert_raw_breakpoint. */
8190 deprecated_remove_raw_breakpoint (void *bp
)
8192 struct bp_target_info
*bp_tgt
= bp
;
8195 ret
= target_remove_breakpoint (bp_tgt
);
8201 /* One (or perhaps two) breakpoints used for software single stepping. */
8203 static void *single_step_breakpoints
[2];
8205 /* Create and insert a breakpoint for software single step. */
8208 insert_single_step_breakpoint (CORE_ADDR next_pc
)
8212 if (single_step_breakpoints
[0] == NULL
)
8213 bpt_p
= &single_step_breakpoints
[0];
8216 gdb_assert (single_step_breakpoints
[1] == NULL
);
8217 bpt_p
= &single_step_breakpoints
[1];
8220 /* NOTE drow/2006-04-11: A future improvement to this function would be
8221 to only create the breakpoints once, and actually put them on the
8222 breakpoint chain. That would let us use set_raw_breakpoint. We could
8223 adjust the addresses each time they were needed. Doing this requires
8224 corresponding changes elsewhere where single step breakpoints are
8225 handled, however. So, for now, we use this. */
8227 *bpt_p
= deprecated_insert_raw_breakpoint (next_pc
);
8229 error (_("Could not insert single-step breakpoint at 0x%s"),
8230 paddr_nz (next_pc
));
8233 /* Remove and delete any breakpoints used for software single step. */
8236 remove_single_step_breakpoints (void)
8238 gdb_assert (single_step_breakpoints
[0] != NULL
);
8240 /* See insert_single_step_breakpoint for more about this deprecated
8242 deprecated_remove_raw_breakpoint (single_step_breakpoints
[0]);
8243 single_step_breakpoints
[0] = NULL
;
8245 if (single_step_breakpoints
[1] != NULL
)
8247 deprecated_remove_raw_breakpoint (single_step_breakpoints
[1]);
8248 single_step_breakpoints
[1] = NULL
;
8252 /* Check whether a software single-step breakpoint is inserted at PC. */
8255 single_step_breakpoint_inserted_here_p (CORE_ADDR pc
)
8259 for (i
= 0; i
< 2; i
++)
8261 struct bp_target_info
*bp_tgt
= single_step_breakpoints
[i
];
8262 if (bp_tgt
&& bp_tgt
->placed_address
== pc
)
8269 /* Tracepoint-specific operations. */
8271 /* Set tracepoint count to NUM. */
8273 set_tracepoint_count (int num
)
8275 tracepoint_count
= num
;
8276 set_internalvar_integer (lookup_internalvar ("tpnum"), num
);
8280 trace_command (char *arg
, int from_tty
)
8282 break_command_really (arg
,
8283 NULL
, 0, 1 /* parse arg */,
8284 0 /* tempflag */, 0 /* hardwareflag */,
8286 0 /* Ignore count */,
8287 pending_break_support
,
8291 set_tracepoint_count (breakpoint_count
);
8294 /* Print information on tracepoint number TPNUM_EXP, or all if
8298 tracepoints_info (char *tpnum_exp
, int from_tty
)
8300 struct breakpoint
*b
;
8301 int tps_to_list
= 0;
8303 /* In the no-arguments case, say "No tracepoints" if none found. */
8316 ui_out_message (uiout
, 0, "No tracepoints.\n");
8321 /* Otherwise be the same as "info break". */
8322 breakpoints_info (tpnum_exp
, from_tty
);
8325 /* The 'enable trace' command enables tracepoints.
8326 Not supported by all targets. */
8328 enable_trace_command (char *args
, int from_tty
)
8330 enable_command (args
, from_tty
);
8333 /* The 'disable trace' command disables tracepoints.
8334 Not supported by all targets. */
8336 disable_trace_command (char *args
, int from_tty
)
8338 disable_command (args
, from_tty
);
8341 /* Remove a tracepoint (or all if no argument) */
8343 delete_trace_command (char *arg
, int from_tty
)
8345 struct breakpoint
*b
, *temp
;
8351 int breaks_to_delete
= 0;
8353 /* Delete all breakpoints if no argument.
8354 Do not delete internal or call-dummy breakpoints, these
8355 have to be deleted with an explicit breakpoint number argument. */
8360 breaks_to_delete
= 1;
8365 /* Ask user only if there are some breakpoints to delete. */
8367 || (breaks_to_delete
&& query (_("Delete all tracepoints? "))))
8369 ALL_BREAKPOINTS_SAFE (b
, temp
)
8371 if (b
->type
== bp_tracepoint
&&
8373 delete_breakpoint (b
);
8378 map_breakpoint_numbers (arg
, delete_breakpoint
);
8381 /* Set passcount for tracepoint.
8383 First command argument is passcount, second is tracepoint number.
8384 If tracepoint number omitted, apply to most recently defined.
8385 Also accepts special argument "all". */
8388 trace_pass_command (char *args
, int from_tty
)
8390 struct breakpoint
*t1
= (struct breakpoint
*) -1, *t2
;
8394 if (args
== 0 || *args
== 0)
8395 error (_("passcount command requires an argument (count + optional TP num)"));
8397 count
= strtoul (args
, &args
, 10); /* Count comes first, then TP num. */
8399 while (*args
&& isspace ((int) *args
))
8402 if (*args
&& strncasecmp (args
, "all", 3) == 0)
8404 args
+= 3; /* Skip special argument "all". */
8407 error (_("Junk at end of arguments."));
8410 t1
= get_tracepoint_by_number (&args
, 1, 1);
8416 ALL_TRACEPOINTS (t2
)
8417 if (t1
== (struct breakpoint
*) -1 || t1
== t2
)
8419 t2
->pass_count
= count
;
8420 observer_notify_tracepoint_modified (t2
->number
);
8422 printf_filtered (_("Setting tracepoint %d's passcount to %d\n"),
8426 t1
= get_tracepoint_by_number (&args
, 1, 0);
8433 get_tracepoint (int num
)
8435 struct breakpoint
*t
;
8438 if (t
->number
== num
)
8444 /* Utility: parse a tracepoint number and look it up in the list.
8445 If MULTI_P is true, there might be a range of tracepoints in ARG.
8446 if OPTIONAL_P is true, then if the argument is missing, the most
8447 recent tracepoint (tracepoint_count) is returned. */
8449 get_tracepoint_by_number (char **arg
, int multi_p
, int optional_p
)
8451 extern int tracepoint_count
;
8452 struct breakpoint
*t
;
8454 char *instring
= arg
== NULL
? NULL
: *arg
;
8456 if (arg
== NULL
|| *arg
== NULL
|| ! **arg
)
8459 tpnum
= tracepoint_count
;
8461 error_no_arg (_("tracepoint number"));
8464 tpnum
= multi_p
? get_number_or_range (arg
) : get_number (arg
);
8468 if (instring
&& *instring
)
8469 printf_filtered (_("bad tracepoint number at or near '%s'\n"),
8472 printf_filtered (_("Tracepoint argument missing and no previous tracepoint\n"));
8477 if (t
->number
== tpnum
)
8482 /* FIXME: if we are in the middle of a range we don't want to give
8483 a message. The current interface to get_number_or_range doesn't
8484 allow us to discover this. */
8485 printf_unfiltered ("No tracepoint number %d.\n", tpnum
);
8489 /* save-tracepoints command */
8491 tracepoint_save_command (char *args
, int from_tty
)
8493 struct breakpoint
*tp
;
8495 struct action_line
*line
;
8497 char *i1
= " ", *i2
= " ";
8498 char *indent
, *actionline
, *pathname
;
8500 struct cleanup
*cleanup
;
8502 if (args
== 0 || *args
== 0)
8503 error (_("Argument required (file name in which to save tracepoints)"));
8505 /* See if we have anything to save. */
8506 ALL_TRACEPOINTS (tp
)
8513 warning (_("save-tracepoints: no tracepoints to save."));
8517 pathname
= tilde_expand (args
);
8518 cleanup
= make_cleanup (xfree
, pathname
);
8519 if (!(fp
= fopen (pathname
, "w")))
8520 error (_("Unable to open file '%s' for saving tracepoints (%s)"),
8521 args
, safe_strerror (errno
));
8522 make_cleanup_fclose (fp
);
8524 ALL_TRACEPOINTS (tp
)
8526 if (tp
->addr_string
)
8527 fprintf (fp
, "trace %s\n", tp
->addr_string
);
8530 sprintf_vma (tmp
, tp
->loc
->address
);
8531 fprintf (fp
, "trace *0x%s\n", tmp
);
8535 fprintf (fp
, " passcount %d\n", tp
->pass_count
);
8539 fprintf (fp
, " actions\n");
8541 for (line
= tp
->actions
; line
; line
= line
->next
)
8543 struct cmd_list_element
*cmd
;
8545 QUIT
; /* allow user to bail out with ^C */
8546 actionline
= line
->action
;
8547 while (isspace ((int) *actionline
))
8550 fprintf (fp
, "%s%s\n", indent
, actionline
);
8551 if (*actionline
!= '#') /* skip for comment lines */
8553 cmd
= lookup_cmd (&actionline
, cmdlist
, "", -1, 1);
8555 error (_("Bad action list item: %s"), actionline
);
8556 if (cmd_cfunc_eq (cmd
, while_stepping_pseudocommand
))
8558 else if (cmd_cfunc_eq (cmd
, end_actions_pseudocommand
))
8564 do_cleanups (cleanup
);
8566 printf_filtered (_("Tracepoints saved to file '%s'.\n"), args
);
8570 /* Create a vector of all tracepoints. */
8575 VEC(breakpoint_p
) *tp_vec
= 0;
8576 struct breakpoint
*tp
;
8578 ALL_TRACEPOINTS (tp
)
8580 VEC_safe_push (breakpoint_p
, tp_vec
, tp
);
8587 /* This help string is used for the break, hbreak, tbreak and thbreak commands.
8588 It is defined as a macro to prevent duplication.
8589 COMMAND should be a string constant containing the name of the command. */
8590 #define BREAK_ARGS_HELP(command) \
8591 command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\
8592 LOCATION may be a line number, function name, or \"*\" and an address.\n\
8593 If a line number is specified, break at start of code for that line.\n\
8594 If a function is specified, break at start of code for that function.\n\
8595 If an address is specified, break at that exact address.\n\
8596 With no LOCATION, uses current execution address of selected stack frame.\n\
8597 This is useful for breaking on return to a stack frame.\n\
8599 THREADNUM is the number from \"info threads\".\n\
8600 CONDITION is a boolean expression.\n\
8602 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
8604 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
8606 /* List of subcommands for "catch". */
8607 static struct cmd_list_element
*catch_cmdlist
;
8609 /* List of subcommands for "tcatch". */
8610 static struct cmd_list_element
*tcatch_cmdlist
;
8612 /* Like add_cmd, but add the command to both the "catch" and "tcatch"
8613 lists, and pass some additional user data to the command function. */
8615 add_catch_command (char *name
, char *docstring
,
8616 void (*sfunc
) (char *args
, int from_tty
,
8617 struct cmd_list_element
*command
),
8618 void *user_data_catch
,
8619 void *user_data_tcatch
)
8621 struct cmd_list_element
*command
;
8623 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
8625 set_cmd_sfunc (command
, sfunc
);
8626 set_cmd_context (command
, user_data_catch
);
8628 command
= add_cmd (name
, class_breakpoint
, NULL
, docstring
,
8630 set_cmd_sfunc (command
, sfunc
);
8631 set_cmd_context (command
, user_data_tcatch
);
8635 _initialize_breakpoint (void)
8637 static struct cmd_list_element
*breakpoint_set_cmdlist
;
8638 static struct cmd_list_element
*breakpoint_show_cmdlist
;
8639 struct cmd_list_element
*c
;
8641 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
8643 breakpoint_chain
= 0;
8644 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
8645 before a breakpoint is set. */
8646 breakpoint_count
= 0;
8648 tracepoint_count
= 0;
8650 add_com ("ignore", class_breakpoint
, ignore_command
, _("\
8651 Set ignore-count of breakpoint number N to COUNT.\n\
8652 Usage is `ignore N COUNT'."));
8654 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
8656 add_com ("commands", class_breakpoint
, commands_command
, _("\
8657 Set commands to be executed when a breakpoint is hit.\n\
8658 Give breakpoint number as argument after \"commands\".\n\
8659 With no argument, the targeted breakpoint is the last one set.\n\
8660 The commands themselves follow starting on the next line.\n\
8661 Type a line containing \"end\" to indicate the end of them.\n\
8662 Give \"silent\" as the first line to make the breakpoint silent;\n\
8663 then no output is printed when it is hit, except what the commands print."));
8665 add_com ("condition", class_breakpoint
, condition_command
, _("\
8666 Specify breakpoint number N to break only if COND is true.\n\
8667 Usage is `condition N COND', where N is an integer and COND is an\n\
8668 expression to be evaluated whenever breakpoint N is reached."));
8670 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
, _("\
8671 Set a temporary breakpoint.\n\
8672 Like \"break\" except the breakpoint is only temporary,\n\
8673 so it will be deleted when hit. Equivalent to \"break\" followed\n\
8674 by using \"enable delete\" on the breakpoint number.\n\
8676 BREAK_ARGS_HELP ("tbreak")));
8677 set_cmd_completer (c
, location_completer
);
8679 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
, _("\
8680 Set a hardware assisted breakpoint.\n\
8681 Like \"break\" except the breakpoint requires hardware support,\n\
8682 some target hardware may not have this support.\n\
8684 BREAK_ARGS_HELP ("hbreak")));
8685 set_cmd_completer (c
, location_completer
);
8687 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
, _("\
8688 Set a temporary hardware assisted breakpoint.\n\
8689 Like \"hbreak\" except the breakpoint is only temporary,\n\
8690 so it will be deleted when hit.\n\
8692 BREAK_ARGS_HELP ("thbreak")));
8693 set_cmd_completer (c
, location_completer
);
8695 add_prefix_cmd ("enable", class_breakpoint
, enable_command
, _("\
8696 Enable some breakpoints.\n\
8697 Give breakpoint numbers (separated by spaces) as arguments.\n\
8698 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8699 This is used to cancel the effect of the \"disable\" command.\n\
8700 With a subcommand you can enable temporarily."),
8701 &enablelist
, "enable ", 1, &cmdlist
);
8703 add_com ("ab", class_breakpoint
, enable_command
, _("\
8704 Enable some breakpoints.\n\
8705 Give breakpoint numbers (separated by spaces) as arguments.\n\
8706 With no subcommand, breakpoints are enabled until you command otherwise.\n\
8707 This is used to cancel the effect of the \"disable\" command.\n\
8708 With a subcommand you can enable temporarily."));
8710 add_com_alias ("en", "enable", class_breakpoint
, 1);
8712 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
, _("\
8713 Enable some breakpoints.\n\
8714 Give breakpoint numbers (separated by spaces) as arguments.\n\
8715 This is used to cancel the effect of the \"disable\" command.\n\
8716 May be abbreviated to simply \"enable\".\n"),
8717 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
8719 add_cmd ("once", no_class
, enable_once_command
, _("\
8720 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8721 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8724 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8725 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8726 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8729 add_cmd ("delete", no_class
, enable_delete_command
, _("\
8730 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
8731 If a breakpoint is hit while enabled in this fashion, it is deleted."),
8734 add_cmd ("once", no_class
, enable_once_command
, _("\
8735 Enable breakpoints for one hit. Give breakpoint numbers.\n\
8736 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
8739 add_prefix_cmd ("disable", class_breakpoint
, disable_command
, _("\
8740 Disable some breakpoints.\n\
8741 Arguments are breakpoint numbers with spaces in between.\n\
8742 To disable all breakpoints, give no argument.\n\
8743 A disabled breakpoint is not forgotten, but has no effect until reenabled."),
8744 &disablelist
, "disable ", 1, &cmdlist
);
8745 add_com_alias ("dis", "disable", class_breakpoint
, 1);
8746 add_com_alias ("disa", "disable", class_breakpoint
, 1);
8748 add_com ("sb", class_breakpoint
, disable_command
, _("\
8749 Disable some breakpoints.\n\
8750 Arguments are breakpoint numbers with spaces in between.\n\
8751 To disable all breakpoints, give no argument.\n\
8752 A disabled breakpoint is not forgotten, but has no effect until reenabled."));
8754 add_cmd ("breakpoints", class_alias
, disable_command
, _("\
8755 Disable some breakpoints.\n\
8756 Arguments are breakpoint numbers with spaces in between.\n\
8757 To disable all breakpoints, give no argument.\n\
8758 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
8759 This command may be abbreviated \"disable\"."),
8762 add_prefix_cmd ("delete", class_breakpoint
, delete_command
, _("\
8763 Delete some breakpoints or auto-display expressions.\n\
8764 Arguments are breakpoint numbers with spaces in between.\n\
8765 To delete all breakpoints, give no argument.\n\
8767 Also a prefix command for deletion of other GDB objects.\n\
8768 The \"unset\" command is also an alias for \"delete\"."),
8769 &deletelist
, "delete ", 1, &cmdlist
);
8770 add_com_alias ("d", "delete", class_breakpoint
, 1);
8771 add_com_alias ("del", "delete", class_breakpoint
, 1);
8773 add_com ("db", class_breakpoint
, delete_command
, _("\
8774 Delete some breakpoints.\n\
8775 Arguments are breakpoint numbers with spaces in between.\n\
8776 To delete all breakpoints, give no argument.\n"));
8778 add_cmd ("breakpoints", class_alias
, delete_command
, _("\
8779 Delete some breakpoints or auto-display expressions.\n\
8780 Arguments are breakpoint numbers with spaces in between.\n\
8781 To delete all breakpoints, give no argument.\n\
8782 This command may be abbreviated \"delete\"."),
8785 add_com ("clear", class_breakpoint
, clear_command
, _("\
8786 Clear breakpoint at specified line or function.\n\
8787 Argument may be line number, function name, or \"*\" and an address.\n\
8788 If line number is specified, all breakpoints in that line are cleared.\n\
8789 If function is specified, breakpoints at beginning of function are cleared.\n\
8790 If an address is specified, breakpoints at that address are cleared.\n\
8792 With no argument, clears all breakpoints in the line that the selected frame\n\
8795 See also the \"delete\" command which clears breakpoints by number."));
8797 c
= add_com ("break", class_breakpoint
, break_command
, _("\
8798 Set breakpoint at specified line or function.\n"
8799 BREAK_ARGS_HELP ("break")));
8800 set_cmd_completer (c
, location_completer
);
8802 add_com_alias ("b", "break", class_run
, 1);
8803 add_com_alias ("br", "break", class_run
, 1);
8804 add_com_alias ("bre", "break", class_run
, 1);
8805 add_com_alias ("brea", "break", class_run
, 1);
8809 add_com_alias ("ba", "break", class_breakpoint
, 1);
8810 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
8815 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
, _("\
8816 Break in function/address or break at a line in the current file."),
8817 &stoplist
, "stop ", 1, &cmdlist
);
8818 add_cmd ("in", class_breakpoint
, stopin_command
,
8819 _("Break in function or address."), &stoplist
);
8820 add_cmd ("at", class_breakpoint
, stopat_command
,
8821 _("Break at a line in the current file."), &stoplist
);
8822 add_com ("status", class_info
, breakpoints_info
, _("\
8823 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8824 The \"Type\" column indicates one of:\n\
8825 \tbreakpoint - normal breakpoint\n\
8826 \twatchpoint - watchpoint\n\
8827 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8828 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8829 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8830 address and file/line number respectively.\n\
8832 Convenience variable \"$_\" and default examine address for \"x\"\n\
8833 are set to the address of the last breakpoint listed unless the command\n\
8834 is prefixed with \"server \".\n\n\
8835 Convenience variable \"$bpnum\" contains the number of the last\n\
8839 add_info ("breakpoints", breakpoints_info
, _("\
8840 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8841 The \"Type\" column indicates one of:\n\
8842 \tbreakpoint - normal breakpoint\n\
8843 \twatchpoint - watchpoint\n\
8844 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8845 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8846 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8847 address and file/line number respectively.\n\
8849 Convenience variable \"$_\" and default examine address for \"x\"\n\
8850 are set to the address of the last breakpoint listed unless the command\n\
8851 is prefixed with \"server \".\n\n\
8852 Convenience variable \"$bpnum\" contains the number of the last\n\
8856 add_com ("lb", class_breakpoint
, breakpoints_info
, _("\
8857 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8858 The \"Type\" column indicates one of:\n\
8859 \tbreakpoint - normal breakpoint\n\
8860 \twatchpoint - watchpoint\n\
8861 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8862 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8863 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8864 address and file/line number respectively.\n\
8866 Convenience variable \"$_\" and default examine address for \"x\"\n\
8867 are set to the address of the last breakpoint listed unless the command\n\
8868 is prefixed with \"server \".\n\n\
8869 Convenience variable \"$bpnum\" contains the number of the last\n\
8872 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
, _("\
8873 Status of all breakpoints, or breakpoint number NUMBER.\n\
8874 The \"Type\" column indicates one of:\n\
8875 \tbreakpoint - normal breakpoint\n\
8876 \twatchpoint - watchpoint\n\
8877 \tlongjmp - internal breakpoint used to step through longjmp()\n\
8878 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
8879 \tuntil - internal breakpoint used by the \"until\" command\n\
8880 \tfinish - internal breakpoint used by the \"finish\" command\n\
8881 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8882 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8883 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8884 address and file/line number respectively.\n\
8886 Convenience variable \"$_\" and default examine address for \"x\"\n\
8887 are set to the address of the last breakpoint listed unless the command\n\
8888 is prefixed with \"server \".\n\n\
8889 Convenience variable \"$bpnum\" contains the number of the last\n\
8891 &maintenanceinfolist
);
8893 add_prefix_cmd ("catch", class_breakpoint
, catch_command
, _("\
8894 Set catchpoints to catch events."),
8895 &catch_cmdlist
, "catch ",
8896 0/*allow-unknown*/, &cmdlist
);
8898 add_prefix_cmd ("tcatch", class_breakpoint
, tcatch_command
, _("\
8899 Set temporary catchpoints to catch events."),
8900 &tcatch_cmdlist
, "tcatch ",
8901 0/*allow-unknown*/, &cmdlist
);
8903 /* Add catch and tcatch sub-commands. */
8904 add_catch_command ("catch", _("\
8905 Catch an exception, when caught.\n\
8906 With an argument, catch only exceptions with the given name."),
8907 catch_catch_command
,
8910 add_catch_command ("throw", _("\
8911 Catch an exception, when thrown.\n\
8912 With an argument, catch only exceptions with the given name."),
8913 catch_throw_command
,
8916 add_catch_command ("fork", _("Catch calls to fork."),
8917 catch_fork_command_1
,
8918 (void *) (uintptr_t) catch_fork_permanent
,
8919 (void *) (uintptr_t) catch_fork_temporary
);
8920 add_catch_command ("vfork", _("Catch calls to vfork."),
8921 catch_fork_command_1
,
8922 (void *) (uintptr_t) catch_vfork_permanent
,
8923 (void *) (uintptr_t) catch_vfork_temporary
);
8924 add_catch_command ("exec", _("Catch calls to exec."),
8925 catch_exec_command_1
,
8928 add_catch_command ("exception", _("\
8929 Catch Ada exceptions, when raised.\n\
8930 With an argument, catch only exceptions with the given name."),
8931 catch_ada_exception_command
,
8934 add_catch_command ("assert", _("\
8935 Catch failed Ada assertions, when raised.\n\
8936 With an argument, catch only exceptions with the given name."),
8937 catch_assert_command
,
8941 c
= add_com ("watch", class_breakpoint
, watch_command
, _("\
8942 Set a watchpoint for an expression.\n\
8943 A watchpoint stops execution of your program whenever the value of\n\
8944 an expression changes."));
8945 set_cmd_completer (c
, expression_completer
);
8947 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
, _("\
8948 Set a read watchpoint for an expression.\n\
8949 A watchpoint stops execution of your program whenever the value of\n\
8950 an expression is read."));
8951 set_cmd_completer (c
, expression_completer
);
8953 c
= add_com ("awatch", class_breakpoint
, awatch_command
, _("\
8954 Set a watchpoint for an expression.\n\
8955 A watchpoint stops execution of your program whenever the value of\n\
8956 an expression is either read or written."));
8957 set_cmd_completer (c
, expression_completer
);
8959 add_info ("watchpoints", breakpoints_info
,
8960 _("Synonym for ``info breakpoints''."));
8963 /* XXX: cagney/2005-02-23: This should be a boolean, and should
8964 respond to changes - contrary to the description. */
8965 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support
,
8966 &can_use_hw_watchpoints
, _("\
8967 Set debugger's willingness to use watchpoint hardware."), _("\
8968 Show debugger's willingness to use watchpoint hardware."), _("\
8969 If zero, gdb will not use hardware for new watchpoints, even if\n\
8970 such is available. (However, any hardware watchpoints that were\n\
8971 created before setting this to nonzero, will continue to use watchpoint\n\
8974 show_can_use_hw_watchpoints
,
8975 &setlist
, &showlist
);
8977 can_use_hw_watchpoints
= 1;
8979 /* Tracepoint manipulation commands. */
8981 c
= add_com ("trace", class_breakpoint
, trace_command
, _("\
8982 Set a tracepoint at specified line or function.\n\
8984 BREAK_ARGS_HELP ("trace") "\n\
8985 Do \"help tracepoints\" for info on other tracepoint commands."));
8986 set_cmd_completer (c
, location_completer
);
8988 add_com_alias ("tp", "trace", class_alias
, 0);
8989 add_com_alias ("tr", "trace", class_alias
, 1);
8990 add_com_alias ("tra", "trace", class_alias
, 1);
8991 add_com_alias ("trac", "trace", class_alias
, 1);
8993 add_info ("tracepoints", tracepoints_info
, _("\
8994 Status of tracepoints, or tracepoint number NUMBER.\n\
8995 Convenience variable \"$tpnum\" contains the number of the\n\
8996 last tracepoint set."));
8998 add_info_alias ("tp", "tracepoints", 1);
9000 add_cmd ("tracepoints", class_trace
, delete_trace_command
, _("\
9001 Delete specified tracepoints.\n\
9002 Arguments are tracepoint numbers, separated by spaces.\n\
9003 No argument means delete all tracepoints."),
9006 c
= add_cmd ("tracepoints", class_trace
, disable_trace_command
, _("\
9007 Disable specified tracepoints.\n\
9008 Arguments are tracepoint numbers, separated by spaces.\n\
9009 No argument means disable all tracepoints."),
9011 deprecate_cmd (c
, "disable");
9013 c
= add_cmd ("tracepoints", class_trace
, enable_trace_command
, _("\
9014 Enable specified tracepoints.\n\
9015 Arguments are tracepoint numbers, separated by spaces.\n\
9016 No argument means enable all tracepoints."),
9018 deprecate_cmd (c
, "enable");
9020 add_com ("passcount", class_trace
, trace_pass_command
, _("\
9021 Set the passcount for a tracepoint.\n\
9022 The trace will end when the tracepoint has been passed 'count' times.\n\
9023 Usage: passcount COUNT TPNUM, where TPNUM may also be \"all\";\n\
9024 if TPNUM is omitted, passcount refers to the last tracepoint defined."));
9026 c
= add_com ("save-tracepoints", class_trace
, tracepoint_save_command
, _("\
9027 Save current tracepoint definitions as a script.\n\
9028 Use the 'source' command in another debug session to restore them."));
9029 set_cmd_completer (c
, filename_completer
);
9031 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, _("\
9032 Breakpoint specific settings\n\
9033 Configure various breakpoint-specific variables such as\n\
9034 pending breakpoint behavior"),
9035 &breakpoint_set_cmdlist
, "set breakpoint ",
9036 0/*allow-unknown*/, &setlist
);
9037 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, _("\
9038 Breakpoint specific settings\n\
9039 Configure various breakpoint-specific variables such as\n\
9040 pending breakpoint behavior"),
9041 &breakpoint_show_cmdlist
, "show breakpoint ",
9042 0/*allow-unknown*/, &showlist
);
9044 add_setshow_auto_boolean_cmd ("pending", no_class
,
9045 &pending_break_support
, _("\
9046 Set debugger's behavior regarding pending breakpoints."), _("\
9047 Show debugger's behavior regarding pending breakpoints."), _("\
9048 If on, an unrecognized breakpoint location will cause gdb to create a\n\
9049 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
9050 an error. If auto, an unrecognized breakpoint location results in a\n\
9051 user-query to see if a pending breakpoint should be created."),
9053 show_pending_break_support
,
9054 &breakpoint_set_cmdlist
,
9055 &breakpoint_show_cmdlist
);
9057 pending_break_support
= AUTO_BOOLEAN_AUTO
;
9059 add_setshow_boolean_cmd ("auto-hw", no_class
,
9060 &automatic_hardware_breakpoints
, _("\
9061 Set automatic usage of hardware breakpoints."), _("\
9062 Show automatic usage of hardware breakpoints."), _("\
9063 If set, the debugger will automatically use hardware breakpoints for\n\
9064 breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
9065 a warning will be emitted for such breakpoints."),
9067 show_automatic_hardware_breakpoints
,
9068 &breakpoint_set_cmdlist
,
9069 &breakpoint_show_cmdlist
);
9071 add_setshow_enum_cmd ("always-inserted", class_support
,
9072 always_inserted_enums
, &always_inserted_mode
, _("\
9073 Set mode for inserting breakpoints."), _("\
9074 Show mode for inserting breakpoints."), _("\
9075 When this mode is off, breakpoints are inserted in inferior when it is\n\
9076 resumed, and removed when execution stops. When this mode is on,\n\
9077 breakpoints are inserted immediately and removed only when the user\n\
9078 deletes the breakpoint. When this mode is auto (which is the default),\n\
9079 the behaviour depends on the non-stop setting (see help set non-stop).\n\
9080 In this case, if gdb is controlling the inferior in non-stop mode, gdb\n\
9081 behaves as if always-inserted mode is on; if gdb is controlling the\n\
9082 inferior in all-stop mode, gdb behaves as if always-inserted mode is off."),
9084 &show_always_inserted_mode
,
9085 &breakpoint_set_cmdlist
,
9086 &breakpoint_show_cmdlist
);
9088 automatic_hardware_breakpoints
= 1;
9090 observer_attach_about_to_proceed (breakpoint_about_to_proceed
);