1 /* Everything about breakpoints, for GDB.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
5 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 2 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, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
28 #include "breakpoint.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"
53 #include "gdb-events.h"
55 /* Prototypes for local functions. */
57 static void until_break_command_continuation (struct continuation_arg
*arg
);
59 static void catch_command_1 (char *, int, int);
61 static void enable_delete_command (char *, int);
63 static void enable_delete_breakpoint (struct breakpoint
*);
65 static void enable_once_command (char *, int);
67 static void enable_once_breakpoint (struct breakpoint
*);
69 static void disable_command (char *, int);
71 static void enable_command (char *, int);
73 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
75 static void ignore_command (char *, int);
77 static int breakpoint_re_set_one (void *);
79 static void clear_command (char *, int);
81 static void catch_command (char *, int);
83 static void watch_command (char *, int);
85 static int can_use_hardware_watchpoint (struct value
*);
87 extern void break_at_finish_command (char *, int);
88 extern void break_at_finish_at_depth_command (char *, int);
90 extern void tbreak_at_finish_command (char *, int);
92 static void break_command_1 (char *, int, int);
94 static void mention (struct breakpoint
*);
96 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
98 static void check_duplicates (struct breakpoint
*);
100 static void breakpoint_adjustment_warning (CORE_ADDR
, CORE_ADDR
, int, int);
102 static CORE_ADDR
adjust_breakpoint_address (CORE_ADDR bpaddr
);
104 static void describe_other_breakpoints (CORE_ADDR
, asection
*);
106 static void breakpoints_info (char *, int);
108 static void breakpoint_1 (int, int);
110 static bpstat
bpstat_alloc (struct breakpoint
*, bpstat
);
112 static int breakpoint_cond_eval (void *);
114 static void cleanup_executing_breakpoints (void *);
116 static void commands_command (char *, int);
118 static void condition_command (char *, int);
120 static int get_number_trailer (char **, int);
122 void set_breakpoint_count (int);
131 static int remove_breakpoint (struct bp_location
*, insertion_state_t
);
133 static enum print_stop_action
print_it_typical (bpstat
);
135 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
139 enum exception_event_kind kind
;
142 args_for_catchpoint_enable
;
144 static int watchpoint_check (void *);
146 static int cover_target_enable_exception_callback (void *);
148 static void maintenance_info_breakpoints (char *, int);
150 static void create_longjmp_breakpoint (char *);
152 static void create_overlay_event_breakpoint (char *);
154 static int hw_breakpoint_used_count (void);
156 static int hw_watchpoint_used_count (enum bptype
, int *);
158 static void hbreak_command (char *, int);
160 static void thbreak_command (char *, int);
162 static void watch_command_1 (char *, int, int);
164 static void rwatch_command (char *, int);
166 static void awatch_command (char *, int);
168 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
170 static void solib_load_unload_1 (char *hookname
,
173 char *cond_string
, enum bptype bp_kind
);
175 static void create_fork_vfork_event_catchpoint (int tempflag
,
177 enum bptype bp_kind
);
179 static void break_at_finish_at_depth_command_1 (char *arg
,
180 int flag
, int from_tty
);
182 static void break_at_finish_command_1 (char *arg
, int flag
, int from_tty
);
184 static void stop_command (char *arg
, int from_tty
);
186 static void stopin_command (char *arg
, int from_tty
);
188 static void stopat_command (char *arg
, int from_tty
);
190 static char *ep_find_event_name_end (char *arg
);
192 static char *ep_parse_optional_if_clause (char **arg
);
194 static char *ep_parse_optional_filename (char **arg
);
196 static void create_exception_catchpoint (int tempflag
, char *cond_string
,
197 enum exception_event_kind ex_event
,
198 struct symtab_and_line
*sal
);
200 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
201 char *arg
, int tempflag
, int from_tty
);
203 static void tcatch_command (char *arg
, int from_tty
);
205 static void ep_skip_leading_whitespace (char **s
);
207 /* Prototypes for exported functions. */
209 /* If FALSE, gdb will not use hardware support for watchpoints, even
210 if such is available. */
211 static int can_use_hw_watchpoints
;
213 void _initialize_breakpoint (void);
215 extern int addressprint
; /* Print machine addresses? */
217 /* Are we executing breakpoint commands? */
218 static int executing_breakpoint_commands
;
220 /* Are overlay event breakpoints enabled? */
221 static int overlay_events_enabled
;
223 /* Walk the following statement or block through all breakpoints.
224 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
227 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
229 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
230 for (B = breakpoint_chain; \
231 B ? (TMP=B->next, 1): 0; \
234 /* Similar iterators for the low-level breakpoints. */
236 #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->next)
238 #define ALL_BP_LOCATIONS_SAFE(B,TMP) \
239 for (B = bp_location_chain; \
240 B ? (TMP=B->next, 1): 0; \
243 /* True if breakpoint hit counts should be displayed in breakpoint info. */
245 int show_breakpoint_hit_counts
= 1;
247 /* Chains of all breakpoints defined. */
249 struct breakpoint
*breakpoint_chain
;
251 struct bp_location
*bp_location_chain
;
253 /* Number of last breakpoint made. */
255 int breakpoint_count
;
257 /* Pointer to current exception event record */
258 static struct exception_event_record
*current_exception_event
;
260 /* Indicator of whether exception catchpoints should be nuked
261 between runs of a program */
262 int exception_catchpoints_are_fragile
= 0;
264 /* Indicator of when exception catchpoints set-up should be
265 reinitialized -- e.g. when program is re-run */
266 int exception_support_initialized
= 0;
268 /* This function returns a pointer to the string representation of the
269 pathname of the dynamically-linked library that has just been
272 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
273 or undefined results are guaranteed.
275 This string's contents are only valid immediately after the
276 inferior has stopped in the dynamic linker hook, and becomes
277 invalid as soon as the inferior is continued. Clients should make
278 a copy of this string if they wish to continue the inferior and
279 then access the string. */
281 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
282 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
285 /* This function returns a pointer to the string representation of the
286 pathname of the dynamically-linked library that has just been
289 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
290 TRUE, or undefined results are guaranteed.
292 This string's contents are only valid immediately after the
293 inferior has stopped in the dynamic linker hook, and becomes
294 invalid as soon as the inferior is continued. Clients should make
295 a copy of this string if they wish to continue the inferior and
296 then access the string. */
298 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
299 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
302 /* This function is called by the "catch load" command. It allows the
303 debugger to be notified by the dynamic linker when a specified
304 library file (or any library file, if filename is NULL) is loaded. */
306 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
307 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
308 error ("catch of library loads not yet implemented on this platform")
311 /* This function is called by the "catch unload" command. It allows
312 the debugger to be notified by the dynamic linker when a specified
313 library file (or any library file, if filename is NULL) is
316 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
317 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \
318 error ("catch of library unloads not yet implemented on this platform")
321 /* Return whether a breakpoint is an active enabled breakpoint. */
323 breakpoint_enabled (struct breakpoint
*b
)
325 return b
->enable_state
== bp_enabled
;
328 /* Set breakpoint count to NUM. */
331 set_breakpoint_count (int num
)
333 breakpoint_count
= num
;
334 set_internalvar (lookup_internalvar ("bpnum"),
335 value_from_longest (builtin_type_int
, (LONGEST
) num
));
338 /* Used in run_command to zero the hit count when a new run starts. */
341 clear_breakpoint_hit_counts (void)
343 struct breakpoint
*b
;
349 /* Default address, symtab and line to put a breakpoint at
350 for "break" command with no arg.
351 if default_breakpoint_valid is zero, the other three are
352 not valid, and "break" with no arg is an error.
354 This set by print_stack_frame, which calls set_default_breakpoint. */
356 int default_breakpoint_valid
;
357 CORE_ADDR default_breakpoint_address
;
358 struct symtab
*default_breakpoint_symtab
;
359 int default_breakpoint_line
;
361 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
362 Advance *PP after the string and any trailing whitespace.
364 Currently the string can either be a number or "$" followed by the name
365 of a convenience variable. Making it an expression wouldn't work well
366 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
368 TRAILER is a character which can be found after the number; most
369 commonly this is `-'. If you don't want a trailer, use \0. */
371 get_number_trailer (char **pp
, int trailer
)
373 int retval
= 0; /* default */
377 /* Empty line means refer to the last breakpoint. */
378 return breakpoint_count
;
381 /* Make a copy of the name, so we can null-terminate it
382 to pass to lookup_internalvar(). */
387 while (isalnum (*p
) || *p
== '_')
389 varname
= (char *) alloca (p
- start
+ 1);
390 strncpy (varname
, start
, p
- start
);
391 varname
[p
- start
] = '\0';
392 val
= value_of_internalvar (lookup_internalvar (varname
));
393 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_INT
)
394 retval
= (int) value_as_long (val
);
397 printf_filtered ("Convenience variable must have integer value.\n");
405 while (*p
>= '0' && *p
<= '9')
408 /* There is no number here. (e.g. "cond a == b"). */
410 /* Skip non-numeric token */
411 while (*p
&& !isspace((int) *p
))
413 /* Return zero, which caller must interpret as error. */
419 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
421 /* Trailing junk: return 0 and let caller print error msg. */
422 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
433 /* Like get_number_trailer, but don't allow a trailer. */
435 get_number (char **pp
)
437 return get_number_trailer (pp
, '\0');
440 /* Parse a number or a range.
441 * A number will be of the form handled by get_number.
442 * A range will be of the form <number1> - <number2>, and
443 * will represent all the integers between number1 and number2,
446 * While processing a range, this fuction is called iteratively;
447 * At each call it will return the next value in the range.
449 * At the beginning of parsing a range, the char pointer PP will
450 * be advanced past <number1> and left pointing at the '-' token.
451 * Subsequent calls will not advance the pointer until the range
452 * is completed. The call that completes the range will advance
453 * pointer PP past <number2>.
457 get_number_or_range (char **pp
)
459 static int last_retval
, end_value
;
460 static char *end_ptr
;
461 static int in_range
= 0;
465 /* Default case: pp is pointing either to a solo number,
466 or to the first number of a range. */
467 last_retval
= get_number_trailer (pp
, '-');
472 /* This is the start of a range (<number1> - <number2>).
473 Skip the '-', parse and remember the second number,
474 and also remember the end of the final token. */
478 while (isspace ((int) *end_ptr
))
479 end_ptr
++; /* skip white space */
480 end_value
= get_number (temp
);
481 if (end_value
< last_retval
)
483 error ("inverted range");
485 else if (end_value
== last_retval
)
487 /* degenerate range (number1 == number2). Advance the
488 token pointer so that the range will be treated as a
497 error ("negative value");
500 /* pp points to the '-' that betokens a range. All
501 number-parsing has already been done. Return the next
502 integer value (one greater than the saved previous value).
503 Do not advance the token pointer 'pp' until the end of range
506 if (++last_retval
== end_value
)
508 /* End of range reached; advance token pointer. */
518 /* condition N EXP -- set break condition of breakpoint N to EXP. */
521 condition_command (char *arg
, int from_tty
)
523 struct breakpoint
*b
;
528 error_no_arg ("breakpoint number");
531 bnum
= get_number (&p
);
533 error ("Bad breakpoint argument: '%s'", arg
);
536 if (b
->number
== bnum
)
543 if (b
->cond_string
!= NULL
)
544 xfree (b
->cond_string
);
549 b
->cond_string
= NULL
;
551 printf_filtered ("Breakpoint %d now unconditional.\n", bnum
);
556 /* I don't know if it matters whether this is the string the user
557 typed in or the decompiled expression. */
558 b
->cond_string
= savestring (arg
, strlen (arg
));
559 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->loc
->address
), 0);
561 error ("Junk at end of expression");
563 breakpoints_changed ();
564 breakpoint_modify_event (b
->number
);
568 error ("No breakpoint number %d.", bnum
);
572 commands_command (char *arg
, int from_tty
)
574 struct breakpoint
*b
;
577 struct command_line
*l
;
579 /* If we allowed this, we would have problems with when to
580 free the storage, if we change the commands currently
583 if (executing_breakpoint_commands
)
584 error ("Can't use the \"commands\" command among a breakpoint's commands.");
587 bnum
= get_number (&p
);
590 error ("Unexpected extra arguments following breakpoint number.");
593 if (b
->number
== bnum
)
595 char *tmpbuf
= xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
597 struct cleanup
*cleanups
= make_cleanup (xfree
, tmpbuf
);
598 l
= read_command_lines (tmpbuf
, from_tty
);
599 do_cleanups (cleanups
);
600 free_command_lines (&b
->commands
);
602 breakpoints_changed ();
603 breakpoint_modify_event (b
->number
);
606 error ("No breakpoint number %d.", bnum
);
609 /* Like target_read_memory() but if breakpoints are inserted, return
610 the shadow contents instead of the breakpoints themselves.
612 Read "memory data" from whatever target or inferior we have.
613 Returns zero if successful, errno value if not. EIO is used
614 for address out of bounds. If breakpoints are inserted, returns
615 shadow contents, not the breakpoints themselves. From breakpoint.c. */
618 read_memory_nobpt (CORE_ADDR memaddr
, char *myaddr
, unsigned len
)
621 struct bp_location
*b
;
622 CORE_ADDR bp_addr
= 0;
625 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
626 /* No breakpoints on this machine. */
627 return target_read_memory (memaddr
, myaddr
, len
);
631 if (b
->owner
->type
== bp_none
)
632 warning ("reading through apparently deleted breakpoint #%d?",
635 if (b
->loc_type
!= bp_loc_software_breakpoint
)
639 /* Addresses and length of the part of the breakpoint that
641 /* XXXX The m68k, sh and h8300 have different local and remote
642 breakpoint values. BREAKPOINT_FROM_PC still manages to
643 correctly determine the breakpoints memory address and size
644 for these targets. */
645 bp_addr
= b
->address
;
647 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
652 if (bp_addr
+ bp_size
<= memaddr
)
653 /* The breakpoint is entirely before the chunk of memory we
656 if (bp_addr
>= memaddr
+ len
)
657 /* The breakpoint is entirely after the chunk of memory we are
660 /* Copy the breakpoint from the shadow contents, and recurse for
661 the things before and after. */
663 /* Offset within shadow_contents. */
666 if (bp_addr
< memaddr
)
668 /* Only copy the second part of the breakpoint. */
669 bp_size
-= memaddr
- bp_addr
;
670 bptoffset
= memaddr
- bp_addr
;
674 if (bp_addr
+ bp_size
> memaddr
+ len
)
676 /* Only copy the first part of the breakpoint. */
677 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
680 memcpy (myaddr
+ bp_addr
- memaddr
,
681 b
->shadow_contents
+ bptoffset
, bp_size
);
683 if (bp_addr
> memaddr
)
685 /* Copy the section of memory before the breakpoint. */
686 status
= read_memory_nobpt (memaddr
, myaddr
, bp_addr
- memaddr
);
691 if (bp_addr
+ bp_size
< memaddr
+ len
)
693 /* Copy the section of memory after the breakpoint. */
694 status
= read_memory_nobpt (bp_addr
+ bp_size
,
695 myaddr
+ bp_addr
+ bp_size
- memaddr
,
696 memaddr
+ len
- (bp_addr
+ bp_size
));
703 /* Nothing overlaps. Just call read_memory_noerr. */
704 return target_read_memory (memaddr
, myaddr
, len
);
708 /* A wrapper function for inserting catchpoints. */
710 insert_catchpoint (struct ui_out
*uo
, void *args
)
712 struct breakpoint
*b
= (struct breakpoint
*) args
;
718 val
= target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
721 val
= target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
724 val
= target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
727 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
732 throw_exception (RETURN_ERROR
);
737 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
738 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
739 PROCESS_WARNING, and HW_BREAKPOINT_ERROR are used to report problems.
741 NOTE drow/2003-09-09: This routine could be broken down to an object-style
742 method for each breakpoint or catchpoint type. */
744 insert_bp_location (struct bp_location
*bpt
,
745 struct ui_file
*tmp_error_stream
,
746 int *disabled_breaks
, int *process_warning
,
747 int *hw_breakpoint_error
)
751 /* Permanent breakpoints cannot be inserted or removed. Disabled
752 breakpoints should not be inserted. */
753 if (!breakpoint_enabled (bpt
->owner
))
756 if (bpt
->inserted
|| bpt
->duplicate
)
759 if (bpt
->loc_type
== bp_loc_software_breakpoint
760 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
762 /* First check to see if we have to handle an overlay. */
763 if (overlay_debugging
== ovly_off
764 || bpt
->section
== NULL
765 || !(section_is_overlay (bpt
->section
)))
767 /* No overlay handling: just set the breakpoint. */
769 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
770 val
= target_insert_hw_breakpoint (bpt
->address
,
771 bpt
->shadow_contents
);
773 val
= target_insert_breakpoint (bpt
->address
,
774 bpt
->shadow_contents
);
778 /* This breakpoint is in an overlay section.
779 Shall we set a breakpoint at the LMA? */
780 if (!overlay_events_enabled
)
782 /* Yes -- overlay event support is not active,
783 so we must try to set a breakpoint at the LMA.
784 This will not work for a hardware breakpoint. */
785 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
786 warning ("hardware breakpoint %d not supported in overlay!\n",
790 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
792 /* Set a software (trap) breakpoint at the LMA. */
793 val
= target_insert_breakpoint (addr
, bpt
->shadow_contents
);
795 fprintf_unfiltered (tmp_error_stream
,
796 "Overlay breakpoint %d failed: in ROM?",
800 /* Shall we set a breakpoint at the VMA? */
801 if (section_is_mapped (bpt
->section
))
803 /* Yes. This overlay section is mapped into memory. */
804 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
805 val
= target_insert_hw_breakpoint (bpt
->address
,
806 bpt
->shadow_contents
);
808 val
= target_insert_breakpoint (bpt
->address
,
809 bpt
->shadow_contents
);
813 /* No. This breakpoint will not be inserted.
814 No error, but do not mark the bp as 'inserted'. */
821 /* Can't set the breakpoint. */
822 #if defined (DISABLE_UNSETTABLE_BREAK)
823 if (DISABLE_UNSETTABLE_BREAK (bpt
->address
))
825 /* See also: disable_breakpoints_in_shlibs. */
827 bpt
->owner
->enable_state
= bp_shlib_disabled
;
828 if (!*disabled_breaks
)
830 fprintf_unfiltered (tmp_error_stream
,
831 "Cannot insert breakpoint %d.\n",
833 fprintf_unfiltered (tmp_error_stream
,
834 "Temporarily disabling shared library breakpoints:\n");
836 *disabled_breaks
= 1;
837 fprintf_unfiltered (tmp_error_stream
,
838 "breakpoint #%d\n", bpt
->owner
->number
);
843 #ifdef ONE_PROCESS_WRITETEXT
844 *process_warning
= 1;
846 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
848 *hw_breakpoint_error
= 1;
849 fprintf_unfiltered (tmp_error_stream
,
850 "Cannot insert hardware breakpoint %d.\n",
855 fprintf_unfiltered (tmp_error_stream
,
856 "Cannot insert breakpoint %d.\n",
858 fprintf_filtered (tmp_error_stream
,
859 "Error accessing memory address ");
860 print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
861 fprintf_filtered (tmp_error_stream
, ": %s.\n",
862 safe_strerror (val
));
873 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
874 /* NOTE drow/2003-09-08: This state only exists for removing
875 watchpoints. It's not clear that it's necessary... */
876 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
878 /* FIXME drow/2003-09-08: This code sets multiple hardware watchpoints
879 based on the expression. Ideally this should happen at a higher level,
880 and there should be one bp_location for each computed address we
881 must watch. As soon as a many-to-one mapping is available I'll
884 struct frame_info
*saved_frame
;
885 int saved_level
, within_current_scope
;
886 struct value
*mark
= value_mark ();
889 /* Save the current frame and level so we can restore it after
890 evaluating the watchpoint expression on its own frame. */
891 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
892 took a frame parameter, so that we didn't have to change the
894 saved_frame
= deprecated_selected_frame
;
895 saved_level
= frame_relative_level (deprecated_selected_frame
);
897 /* Determine if the watchpoint is within scope. */
898 if (bpt
->owner
->exp_valid_block
== NULL
)
899 within_current_scope
= 1;
902 struct frame_info
*fi
;
903 fi
= frame_find_by_id (bpt
->owner
->watchpoint_frame
);
904 within_current_scope
= (fi
!= NULL
);
905 if (within_current_scope
)
909 if (within_current_scope
)
911 /* Evaluate the expression and cut the chain of values
912 produced off from the value chain.
914 Make sure the value returned isn't lazy; we use
915 laziness to determine what memory GDB actually needed
916 in order to compute the value of the expression. */
917 v
= evaluate_expression (bpt
->owner
->exp
);
919 value_release_to_mark (mark
);
921 bpt
->owner
->val_chain
= v
;
924 /* Look at each value on the value chain. */
925 for (; v
; v
= v
->next
)
927 /* If it's a memory location, and GDB actually needed
928 its contents to evaluate the expression, then we
930 if (VALUE_LVAL (v
) == lval_memory
933 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
935 /* We only watch structs and arrays if user asked
936 for it explicitly, never if they just happen to
937 appear in the middle of some value chain. */
938 if (v
== bpt
->owner
->val_chain
939 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
940 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
945 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
946 len
= TYPE_LENGTH (VALUE_TYPE (v
));
948 if (bpt
->owner
->type
== bp_read_watchpoint
)
950 else if (bpt
->owner
->type
== bp_access_watchpoint
)
953 val
= target_insert_watchpoint (addr
, len
, type
);
956 /* Don't exit the loop, try to insert
957 every value on the value chain. That's
958 because we will be removing all the
959 watches below, and removing a
960 watchpoint we didn't insert could have
968 /* Failure to insert a watchpoint on any memory value in the
969 value chain brings us here. */
972 remove_breakpoint (bpt
, mark_uninserted
);
973 *hw_breakpoint_error
= 1;
974 fprintf_unfiltered (tmp_error_stream
,
975 "Could not insert hardware watchpoint %d.\n",
982 printf_filtered ("Hardware watchpoint %d deleted ", bpt
->owner
->number
);
983 printf_filtered ("because the program has left the block \n");
984 printf_filtered ("in which its expression is valid.\n");
985 if (bpt
->owner
->related_breakpoint
)
986 bpt
->owner
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
987 bpt
->owner
->disposition
= disp_del_at_next_stop
;
990 /* Restore the frame and level. */
991 if (saved_frame
!= deprecated_selected_frame
992 || saved_level
!= frame_relative_level (deprecated_selected_frame
))
993 select_frame (saved_frame
);
998 else if (ep_is_exception_catchpoint (bpt
->owner
))
1000 /* FIXME drow/2003-09-09: This code sets both a catchpoint and a
1001 breakpoint. Once again, it would be better if this was represented
1002 as two bp_locations. */
1004 /* If we get here, we must have a callback mechanism for exception
1005 events -- with g++ style embedded label support, we insert
1006 ordinary breakpoints and not catchpoints. */
1007 val
= target_insert_breakpoint (bpt
->address
, bpt
->shadow_contents
);
1010 /* Couldn't set breakpoint for some reason */
1011 fprintf_unfiltered (tmp_error_stream
,
1012 "Cannot insert catchpoint %d; disabling it.\n",
1013 bpt
->owner
->number
);
1014 fprintf_filtered (tmp_error_stream
,
1015 "Error accessing memory address ");
1016 print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
1017 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1018 safe_strerror (val
));
1019 bpt
->owner
->enable_state
= bp_disabled
;
1023 /* Bp set, now make sure callbacks are enabled */
1024 /* Format possible error msg */
1025 char *message
= xstrprintf ("Error inserting catchpoint %d:\n",
1026 bpt
->owner
->number
);
1027 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
1029 args_for_catchpoint_enable args
;
1030 args
.kind
= bpt
->owner
->type
== bp_catch_catch
?
1031 EX_EVENT_CATCH
: EX_EVENT_THROW
;
1033 val
= catch_errors (cover_target_enable_exception_callback
,
1034 &args
, message
, RETURN_MASK_ALL
);
1035 do_cleanups (cleanups
);
1036 if (val
!= 0 && val
!= -1)
1039 /* Check if something went wrong; val == 0 can be ignored */
1042 /* something went wrong */
1043 fprintf_unfiltered (tmp_error_stream
,
1044 "Cannot insert catchpoint %d; disabling it.\n",
1045 bpt
->owner
->number
);
1046 bpt
->owner
->enable_state
= bp_disabled
;
1053 else if (bpt
->owner
->type
== bp_catch_fork
1054 || bpt
->owner
->type
== bp_catch_vfork
1055 || bpt
->owner
->type
== bp_catch_exec
)
1057 char *prefix
= xstrprintf ("warning: inserting catchpoint %d: ",
1058 bpt
->owner
->number
);
1059 struct cleanup
*cleanups
= make_cleanup (xfree
, prefix
);
1060 val
= catch_exceptions (uiout
, insert_catchpoint
, bpt
->owner
, prefix
,
1062 do_cleanups (cleanups
);
1064 bpt
->owner
->enable_state
= bp_disabled
;
1068 /* We've already printed an error message if there was a problem
1069 inserting this catchpoint, and we've disabled the catchpoint,
1070 so just return success. */
1077 /* insert_breakpoints is used when starting or continuing the program.
1078 remove_breakpoints is used when the program stops.
1079 Both return zero if successful,
1080 or an `errno' value if could not write the inferior. */
1083 insert_breakpoints (void)
1085 struct bp_location
*b
, *temp
;
1086 int return_val
= 0; /* return success code. */
1088 int disabled_breaks
= 0;
1089 int hw_breakpoint_error
= 0;
1090 int process_warning
= 0;
1092 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1093 make_cleanup_ui_file_delete (tmp_error_stream
);
1095 /* Explicitly mark the warning -- this will only be printed if
1096 there was an error. */
1097 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1099 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1101 /* Permanent breakpoints cannot be inserted or removed. Disabled
1102 breakpoints should not be inserted. */
1103 if (!breakpoint_enabled (b
->owner
))
1106 /* FIXME drow/2003-10-07: This code should be pushed elsewhere when
1107 hardware watchpoints are split into multiple loc breakpoints. */
1108 if ((b
->loc_type
== bp_loc_hardware_watchpoint
1109 || b
->owner
->type
== bp_watchpoint
) && !b
->owner
->val
)
1112 val
= evaluate_expression (b
->owner
->exp
);
1113 release_value (val
);
1114 if (VALUE_LAZY (val
))
1115 value_fetch_lazy (val
);
1116 b
->owner
->val
= val
;
1119 val
= insert_bp_location (b
, tmp_error_stream
,
1120 &disabled_breaks
, &process_warning
,
1121 &hw_breakpoint_error
);
1128 /* If a hardware breakpoint or watchpoint was inserted, add a
1129 message about possibly exhausted resources. */
1130 if (hw_breakpoint_error
)
1132 fprintf_unfiltered (tmp_error_stream
,
1133 "Could not insert hardware breakpoints:\n\
1134 You may have requested too many hardware breakpoints/watchpoints.\n");
1136 #ifdef ONE_PROCESS_WRITETEXT
1137 if (process_warning
)
1138 fprintf_unfiltered (tmp_error_stream
,
1139 "The same program may be running in another process.");
1141 target_terminal_ours_for_output ();
1142 error_stream (tmp_error_stream
);
1148 remove_breakpoints (void)
1150 struct bp_location
*b
;
1153 ALL_BP_LOCATIONS (b
)
1157 val
= remove_breakpoint (b
, mark_uninserted
);
1166 remove_hw_watchpoints (void)
1168 struct bp_location
*b
;
1171 ALL_BP_LOCATIONS (b
)
1173 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1175 val
= remove_breakpoint (b
, mark_uninserted
);
1184 reattach_breakpoints (int pid
)
1186 struct bp_location
*b
;
1188 struct cleanup
*old_chain
= save_inferior_ptid ();
1190 /* Set inferior_ptid; remove_breakpoint uses this global. */
1191 inferior_ptid
= pid_to_ptid (pid
);
1192 ALL_BP_LOCATIONS (b
)
1196 remove_breakpoint (b
, mark_inserted
);
1197 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1198 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
1200 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
1201 /* FIXME drow/2003-10-07: This doesn't handle any other kinds of
1202 breakpoints. It's wrong for watchpoints, for example. */
1205 do_cleanups (old_chain
);
1210 do_cleanups (old_chain
);
1215 update_breakpoints_after_exec (void)
1217 struct breakpoint
*b
;
1218 struct breakpoint
*temp
;
1220 /* Doing this first prevents the badness of having delete_breakpoint()
1221 write a breakpoint's current "shadow contents" to lift the bp. That
1222 shadow is NOT valid after an exec()! */
1223 mark_breakpoints_out ();
1225 ALL_BREAKPOINTS_SAFE (b
, temp
)
1227 /* Solib breakpoints must be explicitly reset after an exec(). */
1228 if (b
->type
== bp_shlib_event
)
1230 delete_breakpoint (b
);
1234 /* Thread event breakpoints must be set anew after an exec(),
1235 as must overlay event breakpoints. */
1236 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1238 delete_breakpoint (b
);
1242 /* Step-resume breakpoints are meaningless after an exec(). */
1243 if (b
->type
== bp_step_resume
)
1245 delete_breakpoint (b
);
1249 /* Ditto the sigtramp handler breakpoints. */
1250 if (b
->type
== bp_through_sigtramp
)
1252 delete_breakpoint (b
);
1256 /* Ditto the exception-handling catchpoints. */
1257 if ((b
->type
== bp_catch_catch
) || (b
->type
== bp_catch_throw
))
1259 delete_breakpoint (b
);
1263 /* Don't delete an exec catchpoint, because else the inferior
1264 won't stop when it ought!
1266 Similarly, we probably ought to keep vfork catchpoints, 'cause
1267 on this target, we may not be able to stop when the vfork is
1268 seen, but only when the subsequent exec is seen. (And because
1269 deleting fork catchpoints here but not vfork catchpoints will
1270 seem mysterious to users, keep those too.)
1272 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1273 target address field, if any, is sufficient to have it be reset
1274 automagically. Certainly on HP-UX that's true.
1276 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1277 valid code address on some platforms (like the mn10300
1278 simulators). We shouldn't assign any special interpretation to
1279 a breakpoint with a zero address. And in fact, GDB doesn't ---
1280 I can't see what that comment above is talking about. As far
1281 as I can tell, setting the address of a
1282 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1283 is meaningless, since those are implemented with HP-UX kernel
1284 hackery, not by storing breakpoint instructions somewhere. */
1285 if ((b
->type
== bp_catch_exec
) ||
1286 (b
->type
== bp_catch_vfork
) ||
1287 (b
->type
== bp_catch_fork
))
1289 b
->loc
->address
= (CORE_ADDR
) NULL
;
1293 /* bp_finish is a special case. The only way we ought to be able
1294 to see one of these when an exec() has happened, is if the user
1295 caught a vfork, and then said "finish". Ordinarily a finish just
1296 carries them to the call-site of the current callee, by setting
1297 a temporary bp there and resuming. But in this case, the finish
1298 will carry them entirely through the vfork & exec.
1300 We don't want to allow a bp_finish to remain inserted now. But
1301 we can't safely delete it, 'cause finish_command has a handle to
1302 the bp on a bpstat, and will later want to delete it. There's a
1303 chance (and I've seen it happen) that if we delete the bp_finish
1304 here, that its storage will get reused by the time finish_command
1305 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1306 We really must allow finish_command to delete a bp_finish.
1308 In the absense of a general solution for the "how do we know
1309 it's safe to delete something others may have handles to?"
1310 problem, what we'll do here is just uninsert the bp_finish, and
1311 let finish_command delete it.
1313 (We know the bp_finish is "doomed" in the sense that it's
1314 momentary, and will be deleted as soon as finish_command sees
1315 the inferior stopped. So it doesn't matter that the bp's
1316 address is probably bogus in the new a.out, unlike e.g., the
1317 solib breakpoints.) */
1319 if (b
->type
== bp_finish
)
1324 /* Without a symbolic address, we have little hope of the
1325 pre-exec() address meaning the same thing in the post-exec()
1327 if (b
->addr_string
== NULL
)
1329 delete_breakpoint (b
);
1333 /* If this breakpoint has survived the above battery of checks, then
1334 it must have a symbolic address. Be sure that it gets reevaluated
1335 to a target address, rather than reusing the old evaluation.
1337 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1338 for bp_catch_exec and friends, I'm pretty sure this is entirely
1339 unnecessary. A call to breakpoint_re_set_one always recomputes
1340 the breakpoint's address from scratch, or deletes it if it can't.
1341 So I think this assignment could be deleted without effect. */
1342 b
->loc
->address
= (CORE_ADDR
) NULL
;
1344 /* FIXME what about longjmp breakpoints? Re-create them here? */
1345 create_overlay_event_breakpoint ("_ovly_debug_event");
1349 detach_breakpoints (int pid
)
1351 struct bp_location
*b
;
1353 struct cleanup
*old_chain
= save_inferior_ptid ();
1355 if (pid
== PIDGET (inferior_ptid
))
1356 error ("Cannot detach breakpoints of inferior_ptid");
1358 /* Set inferior_ptid; remove_breakpoint uses this global. */
1359 inferior_ptid
= pid_to_ptid (pid
);
1360 ALL_BP_LOCATIONS (b
)
1364 val
= remove_breakpoint (b
, mark_inserted
);
1367 do_cleanups (old_chain
);
1372 do_cleanups (old_chain
);
1377 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1381 if (b
->owner
->enable_state
== bp_permanent
)
1382 /* Permanent breakpoints cannot be inserted or removed. */
1385 if (b
->owner
->type
== bp_none
)
1386 warning ("attempted to remove apparently deleted breakpoint #%d?",
1389 if (b
->loc_type
== bp_loc_software_breakpoint
1390 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1392 /* "Normal" instruction breakpoint: either the standard
1393 trap-instruction bp (bp_breakpoint), or a
1394 bp_hardware_breakpoint. */
1396 /* First check to see if we have to handle an overlay. */
1397 if (overlay_debugging
== ovly_off
1398 || b
->section
== NULL
1399 || !(section_is_overlay (b
->section
)))
1401 /* No overlay handling: just remove the breakpoint. */
1403 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1404 val
= target_remove_hw_breakpoint (b
->address
,
1405 b
->shadow_contents
);
1407 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1411 /* This breakpoint is in an overlay section.
1412 Did we set a breakpoint at the LMA? */
1413 if (!overlay_events_enabled
)
1415 /* Yes -- overlay event support is not active, so we
1416 should have set a breakpoint at the LMA. Remove it.
1418 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
1420 /* Ignore any failures: if the LMA is in ROM, we will
1421 have already warned when we failed to insert it. */
1422 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1423 target_remove_hw_breakpoint (addr
, b
->shadow_contents
);
1425 target_remove_breakpoint (addr
, b
->shadow_contents
);
1427 /* Did we set a breakpoint at the VMA?
1428 If so, we will have marked the breakpoint 'inserted'. */
1431 /* Yes -- remove it. Previously we did not bother to
1432 remove the breakpoint if the section had been
1433 unmapped, but let's not rely on that being safe. We
1434 don't know what the overlay manager might do. */
1435 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1436 val
= target_remove_hw_breakpoint (b
->address
,
1437 b
->shadow_contents
);
1439 val
= target_remove_breakpoint (b
->address
,
1440 b
->shadow_contents
);
1444 /* No -- not inserted, so no need to remove. No error. */
1450 b
->inserted
= (is
== mark_inserted
);
1452 else if (b
->loc_type
== bp_loc_hardware_watchpoint
1453 && breakpoint_enabled (b
->owner
)
1459 b
->inserted
= (is
== mark_inserted
);
1460 /* Walk down the saved value chain. */
1461 for (v
= b
->owner
->val_chain
; v
; v
= v
->next
)
1463 /* For each memory reference remove the watchpoint
1465 if (VALUE_LVAL (v
) == lval_memory
1466 && ! VALUE_LAZY (v
))
1468 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
1470 if (v
== b
->owner
->val_chain
1471 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1472 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1477 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
1478 len
= TYPE_LENGTH (VALUE_TYPE (v
));
1480 if (b
->owner
->type
== bp_read_watchpoint
)
1482 else if (b
->owner
->type
== bp_access_watchpoint
)
1485 val
= target_remove_watchpoint (addr
, len
, type
);
1492 /* Failure to remove any of the hardware watchpoints comes here. */
1493 if ((is
== mark_uninserted
) && (b
->inserted
))
1494 warning ("Could not remove hardware watchpoint %d.",
1497 /* Free the saved value chain. We will construct a new one
1498 the next time the watchpoint is inserted. */
1499 for (v
= b
->owner
->val_chain
; v
; v
= n
)
1504 b
->owner
->val_chain
= NULL
;
1506 else if ((b
->owner
->type
== bp_catch_fork
||
1507 b
->owner
->type
== bp_catch_vfork
||
1508 b
->owner
->type
== bp_catch_exec
)
1509 && breakpoint_enabled (b
->owner
)
1513 switch (b
->owner
->type
)
1516 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1518 case bp_catch_vfork
:
1519 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1522 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1525 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1530 b
->inserted
= (is
== mark_inserted
);
1532 else if ((b
->owner
->type
== bp_catch_catch
||
1533 b
->owner
->type
== bp_catch_throw
)
1534 && breakpoint_enabled (b
->owner
)
1538 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1541 b
->inserted
= (is
== mark_inserted
);
1543 else if (ep_is_exception_catchpoint (b
->owner
)
1544 && b
->inserted
/* sometimes previous insert doesn't happen */
1545 && breakpoint_enabled (b
->owner
)
1549 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1553 b
->inserted
= (is
== mark_inserted
);
1559 /* Clear the "inserted" flag in all breakpoints. */
1562 mark_breakpoints_out (void)
1564 struct bp_location
*bpt
;
1566 ALL_BP_LOCATIONS (bpt
)
1570 /* Clear the "inserted" flag in all breakpoints and delete any
1571 breakpoints which should go away between runs of the program.
1573 Plus other such housekeeping that has to be done for breakpoints
1576 Note: this function gets called at the end of a run (by
1577 generic_mourn_inferior) and when a run begins (by
1578 init_wait_for_inferior). */
1583 breakpoint_init_inferior (enum inf_context context
)
1585 struct breakpoint
*b
, *temp
;
1586 struct bp_location
*bpt
;
1587 static int warning_needed
= 0;
1589 ALL_BP_LOCATIONS (bpt
)
1592 ALL_BREAKPOINTS_SAFE (b
, temp
)
1597 case bp_watchpoint_scope
:
1599 /* If the call dummy breakpoint is at the entry point it will
1600 cause problems when the inferior is rerun, so we better
1603 Also get rid of scope breakpoints. */
1604 delete_breakpoint (b
);
1608 case bp_hardware_watchpoint
:
1609 case bp_read_watchpoint
:
1610 case bp_access_watchpoint
:
1612 /* Likewise for watchpoints on local expressions. */
1613 if (b
->exp_valid_block
!= NULL
)
1614 delete_breakpoint (b
);
1615 if (context
== inf_starting
)
1617 /* Reset val field to force reread of starting value
1618 in insert_breakpoints. */
1620 value_free (b
->val
);
1625 /* Likewise for exception catchpoints in dynamic-linked
1626 executables where required */
1627 if (ep_is_exception_catchpoint (b
) &&
1628 exception_catchpoints_are_fragile
)
1631 delete_breakpoint (b
);
1637 if (exception_catchpoints_are_fragile
)
1638 exception_support_initialized
= 0;
1640 /* Don't issue the warning unless it's really needed... */
1641 if (warning_needed
&& (context
!= inf_exited
))
1643 warning ("Exception catchpoints from last run were deleted.");
1644 warning ("You must reinsert them explicitly.");
1649 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1650 exists at PC. It returns ordinary_breakpoint_here if it's an
1651 ordinary breakpoint, or permanent_breakpoint_here if it's a
1652 permanent breakpoint.
1653 - When continuing from a location with an ordinary breakpoint, we
1654 actually single step once before calling insert_breakpoints.
1655 - When continuing from a localion with a permanent breakpoint, we
1656 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1657 the target, to advance the PC past the breakpoint. */
1659 enum breakpoint_here
1660 breakpoint_here_p (CORE_ADDR pc
)
1662 struct bp_location
*bpt
;
1663 int any_breakpoint_here
= 0;
1665 ALL_BP_LOCATIONS (bpt
)
1667 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1668 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1671 if ((breakpoint_enabled (bpt
->owner
)
1672 || bpt
->owner
->enable_state
== bp_permanent
)
1673 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1675 if (overlay_debugging
1676 && section_is_overlay (bpt
->section
)
1677 && !section_is_mapped (bpt
->section
))
1678 continue; /* unmapped overlay -- can't be a match */
1679 else if (bpt
->owner
->enable_state
== bp_permanent
)
1680 return permanent_breakpoint_here
;
1682 any_breakpoint_here
= 1;
1686 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1690 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1691 but it only returns true if there is actually a breakpoint inserted
1695 breakpoint_inserted_here_p (CORE_ADDR pc
)
1697 struct bp_location
*bpt
;
1699 ALL_BP_LOCATIONS (bpt
)
1701 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1702 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1706 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1708 if (overlay_debugging
1709 && section_is_overlay (bpt
->section
)
1710 && !section_is_mapped (bpt
->section
))
1711 continue; /* unmapped overlay -- can't be a match */
1720 /* This function returns non-zero iff there is a software breakpoint
1724 software_breakpoint_inserted_here_p (CORE_ADDR pc
)
1726 struct bp_location
*bpt
;
1727 int any_breakpoint_here
= 0;
1729 ALL_BP_LOCATIONS (bpt
)
1731 if (bpt
->loc_type
!= bp_loc_software_breakpoint
)
1734 if ((breakpoint_enabled (bpt
->owner
)
1735 || bpt
->owner
->enable_state
== bp_permanent
)
1737 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1739 if (overlay_debugging
1740 && section_is_overlay (bpt
->section
)
1741 && !section_is_mapped (bpt
->section
))
1742 continue; /* unmapped overlay -- can't be a match */
1751 /* Return nonzero if FRAME is a dummy frame. We can't use
1752 DEPRECATED_PC_IN_CALL_DUMMY because figuring out the saved SP would
1753 take too much time, at least using frame_register() on the 68k.
1754 This means that for this function to work right a port must use the
1755 bp_call_dummy breakpoint. */
1758 deprecated_frame_in_dummy (struct frame_info
*frame
)
1760 struct breakpoint
*b
;
1762 /* This function is used by two files: get_frame_type(), after first
1763 checking that !DEPRECATED_USE_GENERIC_DUMMY_FRAMES; and
1764 sparc-tdep.c, which doesn't yet use generic dummy frames anyway. */
1765 gdb_assert (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES
);
1769 if (b
->type
== bp_call_dummy
1770 && frame_id_eq (b
->frame_id
, get_frame_id (frame
))
1771 /* We need to check the PC as well as the frame on the sparc,
1772 for signals.exp in the testsuite. */
1773 && (get_frame_pc (frame
)
1775 - DEPRECATED_SIZEOF_CALL_DUMMY_WORDS
/ sizeof (LONGEST
) * DEPRECATED_REGISTER_SIZE
))
1776 && get_frame_pc (frame
) <= b
->loc
->address
)
1782 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1783 PC is valid for process/thread PTID. */
1786 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1788 struct bp_location
*bpt
;
1791 thread
= pid_to_thread_id (ptid
);
1793 ALL_BP_LOCATIONS (bpt
)
1795 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1796 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1799 if ((breakpoint_enabled (bpt
->owner
)
1800 || bpt
->owner
->enable_state
== bp_permanent
)
1801 && bpt
->address
== pc
1802 && (bpt
->owner
->thread
== -1 || bpt
->owner
->thread
== thread
))
1804 if (overlay_debugging
1805 && section_is_overlay (bpt
->section
)
1806 && !section_is_mapped (bpt
->section
))
1807 continue; /* unmapped overlay -- can't be a match */
1817 /* bpstat stuff. External routines' interfaces are documented
1821 ep_is_catchpoint (struct breakpoint
*ep
)
1824 (ep
->type
== bp_catch_load
)
1825 || (ep
->type
== bp_catch_unload
)
1826 || (ep
->type
== bp_catch_fork
)
1827 || (ep
->type
== bp_catch_vfork
)
1828 || (ep
->type
== bp_catch_exec
)
1829 || (ep
->type
== bp_catch_catch
)
1830 || (ep
->type
== bp_catch_throw
);
1832 /* ??rehrauer: Add more kinds here, as are implemented... */
1836 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1839 (ep
->type
== bp_catch_load
)
1840 || (ep
->type
== bp_catch_unload
);
1844 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1847 (ep
->type
== bp_catch_catch
)
1848 || (ep
->type
== bp_catch_throw
);
1851 /* Clear a bpstat so that it says we are not at any breakpoint.
1852 Also free any storage that is part of a bpstat. */
1855 bpstat_clear (bpstat
*bsp
)
1866 if (p
->old_val
!= NULL
)
1867 value_free (p
->old_val
);
1868 free_command_lines (&p
->commands
);
1875 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1876 is part of the bpstat is copied as well. */
1879 bpstat_copy (bpstat bs
)
1883 bpstat retval
= NULL
;
1888 for (; bs
!= NULL
; bs
= bs
->next
)
1890 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1891 memcpy (tmp
, bs
, sizeof (*tmp
));
1892 if (bs
->commands
!= NULL
)
1893 tmp
->commands
= copy_command_lines (bs
->commands
);
1894 if (bs
->old_val
!= NULL
)
1895 tmp
->old_val
= value_copy (bs
->old_val
);
1898 /* This is the first thing in the chain. */
1908 /* Find the bpstat associated with this breakpoint */
1911 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1916 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1918 if (bsp
->breakpoint_at
== breakpoint
)
1924 /* Find a step_resume breakpoint associated with this bpstat.
1925 (If there are multiple step_resume bp's on the list, this function
1926 will arbitrarily pick one.)
1928 It is an error to use this function if BPSTAT doesn't contain a
1929 step_resume breakpoint.
1931 See wait_for_inferior's use of this function. */
1933 bpstat_find_step_resume_breakpoint (bpstat bsp
)
1938 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1940 current_thread
= pid_to_thread_id (inferior_ptid
);
1942 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1944 if ((bsp
->breakpoint_at
!= NULL
) &&
1945 (bsp
->breakpoint_at
->type
== bp_step_resume
) &&
1946 (bsp
->breakpoint_at
->thread
== current_thread
||
1947 bsp
->breakpoint_at
->thread
== -1))
1948 return bsp
->breakpoint_at
;
1951 error ("Internal error (no step_resume breakpoint found)");
1955 /* Return the breakpoint number of the first breakpoint we are stopped
1956 at. *BSP upon return is a bpstat which points to the remaining
1957 breakpoints stopped at (but which is not guaranteed to be good for
1958 anything but further calls to bpstat_num).
1959 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1962 bpstat_num (bpstat
*bsp
)
1964 struct breakpoint
*b
;
1967 return 0; /* No more breakpoint values */
1970 b
= (*bsp
)->breakpoint_at
;
1971 *bsp
= (*bsp
)->next
;
1973 return -1; /* breakpoint that's been deleted since */
1975 return b
->number
; /* We have its number */
1979 /* Modify BS so that the actions will not be performed. */
1982 bpstat_clear_actions (bpstat bs
)
1984 for (; bs
!= NULL
; bs
= bs
->next
)
1986 free_command_lines (&bs
->commands
);
1987 if (bs
->old_val
!= NULL
)
1989 value_free (bs
->old_val
);
1995 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1997 cleanup_executing_breakpoints (void *ignore
)
1999 executing_breakpoint_commands
= 0;
2002 /* Execute all the commands associated with all the breakpoints at this
2003 location. Any of these commands could cause the process to proceed
2004 beyond this point, etc. We look out for such changes by checking
2005 the global "breakpoint_proceeded" after each command. */
2008 bpstat_do_actions (bpstat
*bsp
)
2011 struct cleanup
*old_chain
;
2013 /* Avoid endless recursion if a `source' command is contained
2015 if (executing_breakpoint_commands
)
2018 executing_breakpoint_commands
= 1;
2019 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
2022 /* Note that (as of this writing), our callers all appear to
2023 be passing us the address of global stop_bpstat. And, if
2024 our calls to execute_control_command cause the inferior to
2025 proceed, that global (and hence, *bsp) will change.
2027 We must be careful to not touch *bsp unless the inferior
2028 has not proceeded. */
2030 /* This pointer will iterate over the list of bpstat's. */
2033 breakpoint_proceeded
= 0;
2034 for (; bs
!= NULL
; bs
= bs
->next
)
2036 struct command_line
*cmd
;
2037 struct cleanup
*this_cmd_tree_chain
;
2039 /* Take ownership of the BSP's command tree, if it has one.
2041 The command tree could legitimately contain commands like
2042 'step' and 'next', which call clear_proceed_status, which
2043 frees stop_bpstat's command tree. To make sure this doesn't
2044 free the tree we're executing out from under us, we need to
2045 take ownership of the tree ourselves. Since a given bpstat's
2046 commands are only executed once, we don't need to copy it; we
2047 can clear the pointer in the bpstat, and make sure we free
2048 the tree when we're done. */
2051 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2055 execute_control_command (cmd
);
2057 if (breakpoint_proceeded
)
2063 /* We can free this command tree now. */
2064 do_cleanups (this_cmd_tree_chain
);
2066 if (breakpoint_proceeded
)
2067 /* The inferior is proceeded by the command; bomb out now.
2068 The bpstat chain has been blown away by wait_for_inferior.
2069 But since execution has stopped again, there is a new bpstat
2070 to look at, so start over. */
2073 do_cleanups (old_chain
);
2076 /* This is the normal print function for a bpstat. In the future,
2077 much of this logic could (should?) be moved to bpstat_stop_status,
2078 by having it set different print_it values.
2080 Current scheme: When we stop, bpstat_print() is called. It loops
2081 through the bpstat list of things causing this stop, calling the
2082 print_bp_stop_message function on each one. The behavior of the
2083 print_bp_stop_message function depends on the print_it field of
2084 bpstat. If such field so indicates, call this function here.
2086 Return values from this routine (ultimately used by bpstat_print()
2087 and normal_stop() to decide what to do):
2088 PRINT_NOTHING: Means we already printed all we needed to print,
2089 don't print anything else.
2090 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2091 that something to be followed by a location.
2092 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2093 that something to be followed by a location.
2094 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2097 static enum print_stop_action
2098 print_it_typical (bpstat bs
)
2100 struct cleanup
*old_chain
, *ui_out_chain
;
2101 struct ui_stream
*stb
;
2102 stb
= ui_out_stream_new (uiout
);
2103 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2104 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2105 which has since been deleted. */
2106 if (bs
->breakpoint_at
== NULL
)
2107 return PRINT_UNKNOWN
;
2109 switch (bs
->breakpoint_at
->type
)
2112 case bp_hardware_breakpoint
:
2113 if (bs
->breakpoint_at
->loc
->address
!= bs
->breakpoint_at
->loc
->requested_address
)
2114 breakpoint_adjustment_warning (bs
->breakpoint_at
->loc
->requested_address
,
2115 bs
->breakpoint_at
->loc
->address
,
2116 bs
->breakpoint_at
->number
, 1);
2117 annotate_breakpoint (bs
->breakpoint_at
->number
);
2118 ui_out_text (uiout
, "\nBreakpoint ");
2119 if (ui_out_is_mi_like_p (uiout
))
2120 ui_out_field_string (uiout
, "reason", "breakpoint-hit");
2121 ui_out_field_int (uiout
, "bkptno", bs
->breakpoint_at
->number
);
2122 ui_out_text (uiout
, ", ");
2123 return PRINT_SRC_AND_LOC
;
2126 case bp_shlib_event
:
2127 /* Did we stop because the user set the stop_on_solib_events
2128 variable? (If so, we report this as a generic, "Stopped due
2129 to shlib event" message.) */
2130 printf_filtered ("Stopped due to shared library event\n");
2131 return PRINT_NOTHING
;
2134 case bp_thread_event
:
2135 /* Not sure how we will get here.
2136 GDB should not stop for these breakpoints. */
2137 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
2138 return PRINT_NOTHING
;
2141 case bp_overlay_event
:
2142 /* By analogy with the thread event, GDB should not stop for these. */
2143 printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n");
2144 return PRINT_NOTHING
;
2148 annotate_catchpoint (bs
->breakpoint_at
->number
);
2149 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2150 printf_filtered ("loaded");
2151 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2152 return PRINT_SRC_AND_LOC
;
2155 case bp_catch_unload
:
2156 annotate_catchpoint (bs
->breakpoint_at
->number
);
2157 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2158 printf_filtered ("unloaded");
2159 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2160 return PRINT_SRC_AND_LOC
;
2164 annotate_catchpoint (bs
->breakpoint_at
->number
);
2165 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2166 printf_filtered ("forked");
2167 printf_filtered (" process %d), ",
2168 bs
->breakpoint_at
->forked_inferior_pid
);
2169 return PRINT_SRC_AND_LOC
;
2172 case bp_catch_vfork
:
2173 annotate_catchpoint (bs
->breakpoint_at
->number
);
2174 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2175 printf_filtered ("vforked");
2176 printf_filtered (" process %d), ",
2177 bs
->breakpoint_at
->forked_inferior_pid
);
2178 return PRINT_SRC_AND_LOC
;
2182 annotate_catchpoint (bs
->breakpoint_at
->number
);
2183 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
2184 bs
->breakpoint_at
->number
,
2185 bs
->breakpoint_at
->exec_pathname
);
2186 return PRINT_SRC_AND_LOC
;
2189 case bp_catch_catch
:
2190 if (current_exception_event
&&
2191 (CURRENT_EXCEPTION_KIND
== EX_EVENT_CATCH
))
2193 annotate_catchpoint (bs
->breakpoint_at
->number
);
2194 printf_filtered ("\nCatchpoint %d (exception caught), ",
2195 bs
->breakpoint_at
->number
);
2196 printf_filtered ("throw location ");
2197 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2198 printf_filtered ("%s:%d",
2199 CURRENT_EXCEPTION_THROW_FILE
,
2200 CURRENT_EXCEPTION_THROW_LINE
);
2202 printf_filtered ("unknown");
2204 printf_filtered (", catch location ");
2205 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2206 printf_filtered ("%s:%d",
2207 CURRENT_EXCEPTION_CATCH_FILE
,
2208 CURRENT_EXCEPTION_CATCH_LINE
);
2210 printf_filtered ("unknown");
2212 printf_filtered ("\n");
2213 /* don't bother to print location frame info */
2214 return PRINT_SRC_ONLY
;
2218 /* really throw, some other bpstat will handle it */
2219 return PRINT_UNKNOWN
;
2223 case bp_catch_throw
:
2224 if (current_exception_event
&&
2225 (CURRENT_EXCEPTION_KIND
== EX_EVENT_THROW
))
2227 annotate_catchpoint (bs
->breakpoint_at
->number
);
2228 printf_filtered ("\nCatchpoint %d (exception thrown), ",
2229 bs
->breakpoint_at
->number
);
2230 printf_filtered ("throw location ");
2231 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2232 printf_filtered ("%s:%d",
2233 CURRENT_EXCEPTION_THROW_FILE
,
2234 CURRENT_EXCEPTION_THROW_LINE
);
2236 printf_filtered ("unknown");
2238 printf_filtered (", catch location ");
2239 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2240 printf_filtered ("%s:%d",
2241 CURRENT_EXCEPTION_CATCH_FILE
,
2242 CURRENT_EXCEPTION_CATCH_LINE
);
2244 printf_filtered ("unknown");
2246 printf_filtered ("\n");
2247 /* don't bother to print location frame info */
2248 return PRINT_SRC_ONLY
;
2252 /* really catch, some other bpstat will handle it */
2253 return PRINT_UNKNOWN
;
2258 case bp_hardware_watchpoint
:
2259 if (bs
->old_val
!= NULL
)
2261 annotate_watchpoint (bs
->breakpoint_at
->number
);
2262 if (ui_out_is_mi_like_p (uiout
))
2263 ui_out_field_string (uiout
, "reason", "watchpoint-trigger");
2264 mention (bs
->breakpoint_at
);
2265 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2266 ui_out_text (uiout
, "\nOld value = ");
2267 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2268 ui_out_field_stream (uiout
, "old", stb
);
2269 ui_out_text (uiout
, "\nNew value = ");
2270 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2271 ui_out_field_stream (uiout
, "new", stb
);
2272 do_cleanups (ui_out_chain
);
2273 ui_out_text (uiout
, "\n");
2274 value_free (bs
->old_val
);
2277 /* More than one watchpoint may have been triggered. */
2278 return PRINT_UNKNOWN
;
2281 case bp_read_watchpoint
:
2282 if (ui_out_is_mi_like_p (uiout
))
2283 ui_out_field_string (uiout
, "reason", "read-watchpoint-trigger");
2284 mention (bs
->breakpoint_at
);
2285 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2286 ui_out_text (uiout
, "\nValue = ");
2287 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2288 ui_out_field_stream (uiout
, "value", stb
);
2289 do_cleanups (ui_out_chain
);
2290 ui_out_text (uiout
, "\n");
2291 return PRINT_UNKNOWN
;
2294 case bp_access_watchpoint
:
2295 if (bs
->old_val
!= NULL
)
2297 annotate_watchpoint (bs
->breakpoint_at
->number
);
2298 if (ui_out_is_mi_like_p (uiout
))
2299 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2300 mention (bs
->breakpoint_at
);
2301 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2302 ui_out_text (uiout
, "\nOld value = ");
2303 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2304 ui_out_field_stream (uiout
, "old", stb
);
2305 value_free (bs
->old_val
);
2307 ui_out_text (uiout
, "\nNew value = ");
2311 mention (bs
->breakpoint_at
);
2312 if (ui_out_is_mi_like_p (uiout
))
2313 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2314 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2315 ui_out_text (uiout
, "\nValue = ");
2317 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0,Val_pretty_default
);
2318 ui_out_field_stream (uiout
, "new", stb
);
2319 do_cleanups (ui_out_chain
);
2320 ui_out_text (uiout
, "\n");
2321 return PRINT_UNKNOWN
;
2324 /* Fall through, we don't deal with these types of breakpoints
2328 if (ui_out_is_mi_like_p (uiout
))
2329 ui_out_field_string (uiout
, "reason", "function-finished");
2330 return PRINT_UNKNOWN
;
2334 if (ui_out_is_mi_like_p (uiout
))
2335 ui_out_field_string (uiout
, "reason", "location-reached");
2336 return PRINT_UNKNOWN
;
2341 case bp_longjmp_resume
:
2342 case bp_step_resume
:
2343 case bp_through_sigtramp
:
2344 case bp_watchpoint_scope
:
2347 return PRINT_UNKNOWN
;
2351 /* Generic routine for printing messages indicating why we
2352 stopped. The behavior of this function depends on the value
2353 'print_it' in the bpstat structure. Under some circumstances we
2354 may decide not to print anything here and delegate the task to
2357 static enum print_stop_action
2358 print_bp_stop_message (bpstat bs
)
2360 switch (bs
->print_it
)
2363 /* Nothing should be printed for this bpstat entry. */
2364 return PRINT_UNKNOWN
;
2368 /* We still want to print the frame, but we already printed the
2369 relevant messages. */
2370 return PRINT_SRC_AND_LOC
;
2373 case print_it_normal
:
2374 /* Normal case. Call the breakpoint's print_it method, or
2375 print_it_typical. */
2376 if (bs
->breakpoint_at
!= NULL
&& bs
->breakpoint_at
->ops
!= NULL
2377 && bs
->breakpoint_at
->ops
->print_it
!= NULL
)
2378 return bs
->breakpoint_at
->ops
->print_it (bs
->breakpoint_at
);
2380 return print_it_typical (bs
);
2384 internal_error (__FILE__
, __LINE__
,
2385 "print_bp_stop_message: unrecognized enum value");
2390 /* Print a message indicating what happened. This is called from
2391 normal_stop(). The input to this routine is the head of the bpstat
2392 list - a list of the eventpoints that caused this stop. This
2393 routine calls the generic print routine for printing a message
2394 about reasons for stopping. This will print (for example) the
2395 "Breakpoint n," part of the output. The return value of this
2398 PRINT_UNKNOWN: Means we printed nothing
2399 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2400 code to print the location. An example is
2401 "Breakpoint 1, " which should be followed by
2403 PRINT_SRC_ONLY: Means we printed something, but there is no need
2404 to also print the location part of the message.
2405 An example is the catch/throw messages, which
2406 don't require a location appended to the end.
2407 PRINT_NOTHING: We have done some printing and we don't need any
2408 further info to be printed.*/
2410 enum print_stop_action
2411 bpstat_print (bpstat bs
)
2415 /* Maybe another breakpoint in the chain caused us to stop.
2416 (Currently all watchpoints go on the bpstat whether hit or not.
2417 That probably could (should) be changed, provided care is taken
2418 with respect to bpstat_explains_signal). */
2419 for (; bs
; bs
= bs
->next
)
2421 val
= print_bp_stop_message (bs
);
2422 if (val
== PRINT_SRC_ONLY
2423 || val
== PRINT_SRC_AND_LOC
2424 || val
== PRINT_NOTHING
)
2428 /* We reached the end of the chain, or we got a null BS to start
2429 with and nothing was printed. */
2430 return PRINT_UNKNOWN
;
2433 /* Evaluate the expression EXP and return 1 if value is zero.
2434 This is used inside a catch_errors to evaluate the breakpoint condition.
2435 The argument is a "struct expression *" that has been cast to char * to
2436 make it pass through catch_errors. */
2439 breakpoint_cond_eval (void *exp
)
2441 struct value
*mark
= value_mark ();
2442 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2443 value_free_to_mark (mark
);
2447 /* Allocate a new bpstat and chain it to the current one. */
2450 bpstat_alloc (struct breakpoint
*b
, bpstat cbs
/* Current "bs" value */ )
2454 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2456 bs
->breakpoint_at
= b
;
2457 /* If the condition is false, etc., don't do the commands. */
2458 bs
->commands
= NULL
;
2460 bs
->print_it
= print_it_normal
;
2464 /* Possible return values for watchpoint_check (this can't be an enum
2465 because of check_errors). */
2466 /* The watchpoint has been deleted. */
2467 #define WP_DELETED 1
2468 /* The value has changed. */
2469 #define WP_VALUE_CHANGED 2
2470 /* The value has not changed. */
2471 #define WP_VALUE_NOT_CHANGED 3
2473 #define BP_TEMPFLAG 1
2474 #define BP_HARDWAREFLAG 2
2476 /* Check watchpoint condition. */
2479 watchpoint_check (void *p
)
2481 bpstat bs
= (bpstat
) p
;
2482 struct breakpoint
*b
;
2483 struct frame_info
*fr
;
2484 int within_current_scope
;
2486 b
= bs
->breakpoint_at
;
2488 if (b
->exp_valid_block
== NULL
)
2489 within_current_scope
= 1;
2492 /* There is no current frame at this moment. If we're going to have
2493 any chance of handling watchpoints on local variables, we'll need
2494 the frame chain (so we can determine if we're in scope). */
2495 reinit_frame_cache ();
2496 fr
= frame_find_by_id (b
->watchpoint_frame
);
2497 within_current_scope
= (fr
!= NULL
);
2498 /* in_function_epilogue_p() returns a non-zero value if we're still
2499 in the function but the stack frame has already been invalidated.
2500 Since we can't rely on the values of local variables after the
2501 stack has been destroyed, we are treating the watchpoint in that
2502 state as `not changed' without further checking.
2504 vinschen/2003-09-04: The former implementation left out the case
2505 that the watchpoint frame couldn't be found by frame_find_by_id()
2506 because the current PC is currently in an epilogue. Calling
2507 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2508 if ((!within_current_scope
|| fr
== get_current_frame ())
2509 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2510 return WP_VALUE_NOT_CHANGED
;
2511 if (fr
&& within_current_scope
)
2512 /* If we end up stopping, the current frame will get selected
2513 in normal_stop. So this call to select_frame won't affect
2518 if (within_current_scope
)
2520 /* We use value_{,free_to_}mark because it could be a
2521 *long* time before we return to the command level and
2522 call free_all_values. We can't call free_all_values because
2523 we might be in the middle of evaluating a function call. */
2525 struct value
*mark
= value_mark ();
2526 struct value
*new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
2527 if (!value_equal (b
->val
, new_val
))
2529 release_value (new_val
);
2530 value_free_to_mark (mark
);
2531 bs
->old_val
= b
->val
;
2533 /* We will stop here */
2534 return WP_VALUE_CHANGED
;
2538 /* Nothing changed, don't do anything. */
2539 value_free_to_mark (mark
);
2540 /* We won't stop here */
2541 return WP_VALUE_NOT_CHANGED
;
2546 /* This seems like the only logical thing to do because
2547 if we temporarily ignored the watchpoint, then when
2548 we reenter the block in which it is valid it contains
2549 garbage (in the case of a function, it may have two
2550 garbage values, one before and one after the prologue).
2551 So we can't even detect the first assignment to it and
2552 watch after that (since the garbage may or may not equal
2553 the first value assigned). */
2554 /* We print all the stop information in print_it_typical(), but
2555 in this case, by the time we call print_it_typical() this bp
2556 will be deleted already. So we have no choice but print the
2557 information here. */
2558 if (ui_out_is_mi_like_p (uiout
))
2559 ui_out_field_string (uiout
, "reason", "watchpoint-scope");
2560 ui_out_text (uiout
, "\nWatchpoint ");
2561 ui_out_field_int (uiout
, "wpnum", bs
->breakpoint_at
->number
);
2562 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2563 which its expression is valid.\n");
2565 if (b
->related_breakpoint
)
2566 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2567 b
->disposition
= disp_del_at_next_stop
;
2573 /* Get a bpstat associated with having just stopped at address *PC
2574 and frame address CORE_ADDRESS. Update *PC to point at the
2575 breakpoint (if we hit a breakpoint). NOT_A_SW_BREAKPOINT is nonzero
2576 if this is known to not be a real breakpoint (it could still be a
2577 watchpoint, though). */
2579 /* Determine whether we stopped at a breakpoint, etc, or whether we
2580 don't understand this stop. Result is a chain of bpstat's such that:
2582 if we don't understand the stop, the result is a null pointer.
2584 if we understand why we stopped, the result is not null.
2586 Each element of the chain refers to a particular breakpoint or
2587 watchpoint at which we have stopped. (We may have stopped for
2588 several reasons concurrently.)
2590 Each element of the chain has valid next, breakpoint_at,
2591 commands, FIXME??? fields. */
2594 bpstat_stop_status (CORE_ADDR
*pc
, int not_a_sw_breakpoint
)
2596 struct breakpoint
*b
, *temp
;
2598 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2599 int real_breakpoint
= 0;
2600 /* Root of the chain of bpstat's */
2601 struct bpstats root_bs
[1];
2602 /* Pointer to the last thing in the chain currently. */
2603 bpstat bs
= root_bs
;
2607 ALL_BREAKPOINTS_SAFE (b
, temp
)
2609 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
2612 if (b
->type
!= bp_watchpoint
2613 && b
->type
!= bp_hardware_watchpoint
2614 && b
->type
!= bp_read_watchpoint
2615 && b
->type
!= bp_access_watchpoint
2616 && b
->type
!= bp_hardware_breakpoint
2617 && b
->type
!= bp_catch_fork
2618 && b
->type
!= bp_catch_vfork
2619 && b
->type
!= bp_catch_exec
2620 && b
->type
!= bp_catch_catch
2621 && b
->type
!= bp_catch_throw
) /* a non-watchpoint bp */
2623 if (b
->loc
->address
!= bp_addr
) /* address doesn't match */
2625 if (overlay_debugging
/* unmapped overlay section */
2626 && section_is_overlay (b
->loc
->section
)
2627 && !section_is_mapped (b
->loc
->section
))
2631 if (b
->type
== bp_hardware_breakpoint
)
2633 if (b
->loc
->address
!= *pc
)
2635 if (overlay_debugging
/* unmapped overlay section */
2636 && section_is_overlay (b
->loc
->section
)
2637 && !section_is_mapped (b
->loc
->section
))
2641 /* Is this a catchpoint of a load or unload? If so, did we
2642 get a load or unload of the specified library? If not,
2644 if ((b
->type
== bp_catch_load
)
2645 #if defined(SOLIB_HAVE_LOAD_EVENT)
2646 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2647 || ((b
->dll_pathname
!= NULL
)
2648 && (strcmp (b
->dll_pathname
,
2649 SOLIB_LOADED_LIBRARY_PATHNAME (
2650 PIDGET (inferior_ptid
)))
2656 if ((b
->type
== bp_catch_unload
)
2657 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2658 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2659 || ((b
->dll_pathname
!= NULL
)
2660 && (strcmp (b
->dll_pathname
,
2661 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2662 PIDGET (inferior_ptid
)))
2668 if ((b
->type
== bp_catch_fork
)
2669 && !inferior_has_forked (PIDGET (inferior_ptid
),
2670 &b
->forked_inferior_pid
))
2673 if ((b
->type
== bp_catch_vfork
)
2674 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2675 &b
->forked_inferior_pid
))
2678 if ((b
->type
== bp_catch_exec
)
2679 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2682 if (ep_is_exception_catchpoint (b
) &&
2683 !(current_exception_event
= target_get_current_exception_event ()))
2686 /* Come here if it's a watchpoint, or if the break address matches */
2688 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
2690 /* Watchpoints may change this, if not found to have triggered. */
2694 if (b
->type
== bp_watchpoint
||
2695 b
->type
== bp_hardware_watchpoint
)
2697 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2699 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2700 int e
= catch_errors (watchpoint_check
, bs
, message
,
2702 do_cleanups (cleanups
);
2706 /* We've already printed what needs to be printed. */
2707 /* Actually this is superfluous, because by the time we
2708 call print_it_typical() the wp will be already deleted,
2709 and the function will return immediately. */
2710 bs
->print_it
= print_it_done
;
2713 case WP_VALUE_CHANGED
:
2717 case WP_VALUE_NOT_CHANGED
:
2719 bs
->print_it
= print_it_noop
;
2726 /* Error from catch_errors. */
2727 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2728 if (b
->related_breakpoint
)
2729 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2730 b
->disposition
= disp_del_at_next_stop
;
2731 /* We've already printed what needs to be printed. */
2732 bs
->print_it
= print_it_done
;
2738 else if (b
->type
== bp_read_watchpoint
||
2739 b
->type
== bp_access_watchpoint
)
2745 addr
= target_stopped_data_address ();
2748 for (v
= b
->val_chain
; v
; v
= v
->next
)
2750 if (VALUE_LVAL (v
) == lval_memory
2751 && ! VALUE_LAZY (v
))
2753 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
2755 if (v
== b
->val_chain
2756 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
2757 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
2761 vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
2762 /* Exact match not required. Within range is
2764 if (addr
>= vaddr
&&
2765 addr
< vaddr
+ TYPE_LENGTH (VALUE_TYPE (v
)))
2772 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2774 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2775 int e
= catch_errors (watchpoint_check
, bs
, message
,
2777 do_cleanups (cleanups
);
2781 /* We've already printed what needs to be printed. */
2782 bs
->print_it
= print_it_done
;
2785 case WP_VALUE_CHANGED
:
2786 if (b
->type
== bp_read_watchpoint
)
2788 /* Don't stop: read watchpoints shouldn't fire if
2789 the value has changed. This is for targets
2790 which cannot set read-only watchpoints. */
2791 bs
->print_it
= print_it_noop
;
2797 case WP_VALUE_NOT_CHANGED
:
2804 /* Error from catch_errors. */
2805 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2806 if (b
->related_breakpoint
)
2807 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2808 b
->disposition
= disp_del_at_next_stop
;
2809 /* We've already printed what needs to be printed. */
2810 bs
->print_it
= print_it_done
;
2814 else /* found == 0 */
2816 /* This is a case where some watchpoint(s) triggered,
2817 but not at the address of this watchpoint (FOUND
2818 was left zero). So don't print anything for this
2820 bs
->print_it
= print_it_noop
;
2827 /* By definition, an encountered breakpoint is a triggered
2831 real_breakpoint
= 1;
2834 if (frame_id_p (b
->frame_id
)
2835 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2839 int value_is_zero
= 0;
2843 /* Need to select the frame, with all that implies
2844 so that the conditions will have the right context. */
2845 select_frame (get_current_frame ());
2847 = catch_errors (breakpoint_cond_eval
, (b
->cond
),
2848 "Error in testing breakpoint condition:\n",
2850 /* FIXME-someday, should give breakpoint # */
2853 if (b
->cond
&& value_is_zero
)
2856 /* Don't consider this a hit. */
2859 else if (b
->ignore_count
> 0)
2862 annotate_ignore_count_change ();
2867 /* We will stop here */
2868 if (b
->disposition
== disp_disable
)
2869 b
->enable_state
= bp_disabled
;
2872 bs
->commands
= b
->commands
;
2874 (strcmp ("silent", bs
->commands
->line
) == 0
2875 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
2877 bs
->commands
= bs
->commands
->next
;
2880 bs
->commands
= copy_command_lines (bs
->commands
);
2883 /* Print nothing for this entry if we dont stop or if we dont print. */
2884 if (bs
->stop
== 0 || bs
->print
== 0)
2885 bs
->print_it
= print_it_noop
;
2888 bs
->next
= NULL
; /* Terminate the chain */
2889 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2891 /* The value of a hardware watchpoint hasn't changed, but the
2892 intermediate memory locations we are watching may have. */
2893 if (bs
&& !bs
->stop
&&
2894 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2895 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2896 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2898 remove_breakpoints ();
2899 insert_breakpoints ();
2904 /* Tell what to do about this bpstat. */
2906 bpstat_what (bpstat bs
)
2908 /* Classify each bpstat as one of the following. */
2911 /* This bpstat element has no effect on the main_action. */
2914 /* There was a watchpoint, stop but don't print. */
2917 /* There was a watchpoint, stop and print. */
2920 /* There was a breakpoint but we're not stopping. */
2923 /* There was a breakpoint, stop but don't print. */
2926 /* There was a breakpoint, stop and print. */
2929 /* We hit the longjmp breakpoint. */
2932 /* We hit the longjmp_resume breakpoint. */
2935 /* We hit the step_resume breakpoint. */
2938 /* We hit the through_sigtramp breakpoint. */
2941 /* We hit the shared library event breakpoint. */
2944 /* We caught a shared library event. */
2947 /* This is just used to count how many enums there are. */
2951 /* Here is the table which drives this routine. So that we can
2952 format it pretty, we define some abbreviations for the
2953 enum bpstat_what codes. */
2954 #define kc BPSTAT_WHAT_KEEP_CHECKING
2955 #define ss BPSTAT_WHAT_STOP_SILENT
2956 #define sn BPSTAT_WHAT_STOP_NOISY
2957 #define sgl BPSTAT_WHAT_SINGLE
2958 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2959 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2960 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2961 #define sr BPSTAT_WHAT_STEP_RESUME
2962 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2963 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2964 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2966 /* "Can't happen." Might want to print an error message.
2967 abort() is not out of the question, but chances are GDB is just
2968 a bit confused, not unusable. */
2969 #define err BPSTAT_WHAT_STOP_NOISY
2971 /* Given an old action and a class, come up with a new action. */
2972 /* One interesting property of this table is that wp_silent is the same
2973 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2974 after stopping, the check for whether to step over a breakpoint
2975 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2976 reference to how we stopped. We retain separate wp_silent and
2977 bp_silent codes in case we want to change that someday.
2979 Another possibly interesting property of this table is that
2980 there's a partial ordering, priority-like, of the actions. Once
2981 you've decided that some action is appropriate, you'll never go
2982 back and decide something of a lower priority is better. The
2985 kc < clr sgl shl shlr slr sn sr ss ts
2986 sgl < clrs shl shlr slr sn sr ss ts
2987 slr < err shl shlr sn sr ss ts
2988 clr < clrs err shl shlr sn sr ss ts
2989 clrs < err shl shlr sn sr ss ts
2990 ss < shl shlr sn sr ts
2997 What I think this means is that we don't need a damned table
2998 here. If you just put the rows and columns in the right order,
2999 it'd look awfully regular. We could simply walk the bpstat list
3000 and choose the highest priority action we find, with a little
3001 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
3002 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
3003 is messy anyway). */
3005 /* step_resume entries: a step resume breakpoint overrides another
3006 breakpoint of signal handling (see comment in wait_for_inferior
3007 at first PC_IN_SIGTRAMP where we set the step_resume breakpoint). */
3008 /* We handle the through_sigtramp_breakpoint the same way; having both
3009 one of those and a step_resume_breakpoint is probably very rare (?). */
3011 static const enum bpstat_what_main_action
3012 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3015 /* kc ss sn sgl slr clr clrs sr ts shl shlr
3018 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, ts
, shl
, shlr
},
3020 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3022 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3024 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, ts
, shl
, shlr
},
3026 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3028 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3030 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, ts
, shl
, shlr
},
3032 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, ts
, shl
, shlr
},
3034 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, ts
, shl
, shlr
},
3036 {ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, shl
, shlr
},
3038 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, shl
, ts
, shl
, shlr
},
3040 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, ts
, shlr
, shlr
}
3055 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3056 struct bpstat_what retval
;
3058 retval
.call_dummy
= 0;
3059 for (; bs
!= NULL
; bs
= bs
->next
)
3061 enum class bs_class
= no_effect
;
3062 if (bs
->breakpoint_at
== NULL
)
3063 /* I suspect this can happen if it was a momentary breakpoint
3064 which has since been deleted. */
3066 switch (bs
->breakpoint_at
->type
)
3072 case bp_hardware_breakpoint
:
3078 bs_class
= bp_noisy
;
3080 bs_class
= bp_silent
;
3083 bs_class
= bp_nostop
;
3086 case bp_hardware_watchpoint
:
3087 case bp_read_watchpoint
:
3088 case bp_access_watchpoint
:
3092 bs_class
= wp_noisy
;
3094 bs_class
= wp_silent
;
3097 /* There was a watchpoint, but we're not stopping.
3098 This requires no further action. */
3099 bs_class
= no_effect
;
3102 bs_class
= long_jump
;
3104 case bp_longjmp_resume
:
3105 bs_class
= long_resume
;
3107 case bp_step_resume
:
3110 bs_class
= step_resume
;
3113 /* It is for the wrong frame. */
3114 bs_class
= bp_nostop
;
3116 case bp_through_sigtramp
:
3117 bs_class
= through_sig
;
3119 case bp_watchpoint_scope
:
3120 bs_class
= bp_nostop
;
3122 case bp_shlib_event
:
3123 bs_class
= shlib_event
;
3125 case bp_thread_event
:
3126 case bp_overlay_event
:
3127 bs_class
= bp_nostop
;
3130 case bp_catch_unload
:
3131 /* Only if this catchpoint triggered should we cause the
3132 step-out-of-dld behaviour. Otherwise, we ignore this
3135 bs_class
= catch_shlib_event
;
3137 bs_class
= no_effect
;
3140 case bp_catch_vfork
:
3145 bs_class
= bp_noisy
;
3147 bs_class
= bp_silent
;
3150 /* There was a catchpoint, but we're not stopping.
3151 This requires no further action. */
3152 bs_class
= no_effect
;
3154 case bp_catch_catch
:
3155 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
3156 bs_class
= bp_nostop
;
3158 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3160 case bp_catch_throw
:
3161 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
3162 bs_class
= bp_nostop
;
3164 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3167 /* Make sure the action is stop (silent or noisy),
3168 so infrun.c pops the dummy frame. */
3169 bs_class
= bp_silent
;
3170 retval
.call_dummy
= 1;
3173 current_action
= table
[(int) bs_class
][(int) current_action
];
3175 retval
.main_action
= current_action
;
3179 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3180 without hardware support). This isn't related to a specific bpstat,
3181 just to things like whether watchpoints are set. */
3184 bpstat_should_step (void)
3186 struct breakpoint
*b
;
3188 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
)
3193 /* Nonzero if there are enabled hardware watchpoints. */
3195 bpstat_have_active_hw_watchpoints (void)
3197 struct bp_location
*bpt
;
3198 ALL_BP_LOCATIONS (bpt
)
3199 if (breakpoint_enabled (bpt
->owner
)
3201 && bpt
->loc_type
== bp_loc_hardware_watchpoint
)
3207 /* Given a bpstat that records zero or more triggered eventpoints, this
3208 function returns another bpstat which contains only the catchpoints
3209 on that first list, if any. */
3211 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3213 struct bpstats root_bs
[1];
3214 bpstat bs
= root_bs
;
3215 struct breakpoint
*ep
;
3218 bpstat_clear (cp_list
);
3219 root_bs
->next
= NULL
;
3221 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3223 /* Is this eventpoint a catchpoint? If not, ignore it. */
3224 ep
= ep_list
->breakpoint_at
;
3227 if ((ep
->type
!= bp_catch_load
) &&
3228 (ep
->type
!= bp_catch_unload
) &&
3229 (ep
->type
!= bp_catch_catch
) &&
3230 (ep
->type
!= bp_catch_throw
))
3231 /* pai: (temp) ADD fork/vfork here!! */
3234 /* Yes; add it to the list. */
3235 bs
= bpstat_alloc (ep
, bs
);
3240 #if defined(SOLIB_ADD)
3241 /* Also, for each triggered catchpoint, tag it with the name of
3242 the library that caused this trigger. (We copy the name now,
3243 because it's only guaranteed to be available NOW, when the
3244 catchpoint triggers. Clients who may wish to know the name
3245 later must get it from the catchpoint itself.) */
3246 if (ep
->triggered_dll_pathname
!= NULL
)
3247 xfree (ep
->triggered_dll_pathname
);
3248 if (ep
->type
== bp_catch_load
)
3249 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3250 PIDGET (inferior_ptid
));
3252 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3253 PIDGET (inferior_ptid
));
3255 dll_pathname
= NULL
;
3259 ep
->triggered_dll_pathname
= (char *)
3260 xmalloc (strlen (dll_pathname
) + 1);
3261 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3264 ep
->triggered_dll_pathname
= NULL
;
3270 /* Print B to gdb_stdout. */
3272 print_one_breakpoint (struct breakpoint
*b
,
3273 CORE_ADDR
*last_addr
)
3275 struct command_line
*l
;
3277 struct ep_type_description
3282 static struct ep_type_description bptypes
[] =
3284 {bp_none
, "?deleted?"},
3285 {bp_breakpoint
, "breakpoint"},
3286 {bp_hardware_breakpoint
, "hw breakpoint"},
3287 {bp_until
, "until"},
3288 {bp_finish
, "finish"},
3289 {bp_watchpoint
, "watchpoint"},
3290 {bp_hardware_watchpoint
, "hw watchpoint"},
3291 {bp_read_watchpoint
, "read watchpoint"},
3292 {bp_access_watchpoint
, "acc watchpoint"},
3293 {bp_longjmp
, "longjmp"},
3294 {bp_longjmp_resume
, "longjmp resume"},
3295 {bp_step_resume
, "step resume"},
3296 {bp_through_sigtramp
, "sigtramp"},
3297 {bp_watchpoint_scope
, "watchpoint scope"},
3298 {bp_call_dummy
, "call dummy"},
3299 {bp_shlib_event
, "shlib events"},
3300 {bp_thread_event
, "thread events"},
3301 {bp_overlay_event
, "overlay events"},
3302 {bp_catch_load
, "catch load"},
3303 {bp_catch_unload
, "catch unload"},
3304 {bp_catch_fork
, "catch fork"},
3305 {bp_catch_vfork
, "catch vfork"},
3306 {bp_catch_exec
, "catch exec"},
3307 {bp_catch_catch
, "catch catch"},
3308 {bp_catch_throw
, "catch throw"}
3311 static char *bpdisps
[] =
3312 {"del", "dstp", "dis", "keep"};
3313 static char bpenables
[] = "nynny";
3314 char wrap_indent
[80];
3315 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3316 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3317 struct cleanup
*bkpt_chain
;
3320 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3324 ui_out_field_int (uiout
, "number", b
->number
);
3328 if (((int) b
->type
> (sizeof (bptypes
) / sizeof (bptypes
[0])))
3329 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3330 internal_error (__FILE__
, __LINE__
,
3331 "bptypes table does not describe type #%d.",
3333 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3337 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3341 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3342 ui_out_spaces (uiout
, 2);
3345 strcpy (wrap_indent
, " ");
3348 if (TARGET_ADDR_BIT
<= 32)
3349 strcat (wrap_indent
, " ");
3351 strcat (wrap_indent
, " ");
3354 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3355 b
->ops
->print_one (b
, last_addr
);
3360 internal_error (__FILE__
, __LINE__
,
3361 "print_one_breakpoint: bp_none encountered\n");
3365 case bp_hardware_watchpoint
:
3366 case bp_read_watchpoint
:
3367 case bp_access_watchpoint
:
3368 /* Field 4, the address, is omitted (which makes the columns
3369 not line up too nicely with the headers, but the effect
3370 is relatively readable). */
3372 ui_out_field_skip (uiout
, "addr");
3374 print_expression (b
->exp
, stb
->stream
);
3375 ui_out_field_stream (uiout
, "what", stb
);
3379 case bp_catch_unload
:
3380 /* Field 4, the address, is omitted (which makes the columns
3381 not line up too nicely with the headers, but the effect
3382 is relatively readable). */
3384 ui_out_field_skip (uiout
, "addr");
3386 if (b
->dll_pathname
== NULL
)
3388 ui_out_field_string (uiout
, "what", "<any library>");
3389 ui_out_spaces (uiout
, 1);
3393 ui_out_text (uiout
, "library \"");
3394 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3395 ui_out_text (uiout
, "\" ");
3400 case bp_catch_vfork
:
3401 /* Field 4, the address, is omitted (which makes the columns
3402 not line up too nicely with the headers, but the effect
3403 is relatively readable). */
3405 ui_out_field_skip (uiout
, "addr");
3407 if (b
->forked_inferior_pid
!= 0)
3409 ui_out_text (uiout
, "process ");
3410 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3411 ui_out_spaces (uiout
, 1);
3415 /* Field 4, the address, is omitted (which makes the columns
3416 not line up too nicely with the headers, but the effect
3417 is relatively readable). */
3419 ui_out_field_skip (uiout
, "addr");
3421 if (b
->exec_pathname
!= NULL
)
3423 ui_out_text (uiout
, "program \"");
3424 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3425 ui_out_text (uiout
, "\" ");
3429 case bp_catch_catch
:
3430 /* Field 4, the address, is omitted (which makes the columns
3431 not line up too nicely with the headers, but the effect
3432 is relatively readable). */
3434 ui_out_field_skip (uiout
, "addr");
3436 ui_out_field_string (uiout
, "what", "exception catch");
3437 ui_out_spaces (uiout
, 1);
3440 case bp_catch_throw
:
3441 /* Field 4, the address, is omitted (which makes the columns
3442 not line up too nicely with the headers, but the effect
3443 is relatively readable). */
3445 ui_out_field_skip (uiout
, "addr");
3447 ui_out_field_string (uiout
, "what", "exception throw");
3448 ui_out_spaces (uiout
, 1);
3452 case bp_hardware_breakpoint
:
3456 case bp_longjmp_resume
:
3457 case bp_step_resume
:
3458 case bp_through_sigtramp
:
3459 case bp_watchpoint_scope
:
3461 case bp_shlib_event
:
3462 case bp_thread_event
:
3463 case bp_overlay_event
:
3467 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
3470 *last_addr
= b
->loc
->address
;
3473 sym
= find_pc_sect_function (b
->loc
->address
, b
->loc
->section
);
3476 ui_out_text (uiout
, "in ");
3477 ui_out_field_string (uiout
, "func",
3478 SYMBOL_PRINT_NAME (sym
));
3479 ui_out_wrap_hint (uiout
, wrap_indent
);
3480 ui_out_text (uiout
, " at ");
3482 ui_out_field_string (uiout
, "file", b
->source_file
);
3483 ui_out_text (uiout
, ":");
3484 ui_out_field_int (uiout
, "line", b
->line_number
);
3488 print_address_symbolic (b
->loc
->address
, stb
->stream
, demangle
, "");
3489 ui_out_field_stream (uiout
, "at", stb
);
3494 if (b
->thread
!= -1)
3496 /* FIXME: This seems to be redundant and lost here; see the
3497 "stop only in" line a little further down. */
3498 ui_out_text (uiout
, " thread ");
3499 ui_out_field_int (uiout
, "thread", b
->thread
);
3502 ui_out_text (uiout
, "\n");
3504 if (frame_id_p (b
->frame_id
))
3507 ui_out_text (uiout
, "\tstop only in stack frame at ");
3508 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3510 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3511 ui_out_text (uiout
, "\n");
3517 ui_out_text (uiout
, "\tstop only if ");
3518 print_expression (b
->cond
, stb
->stream
);
3519 ui_out_field_stream (uiout
, "cond", stb
);
3520 ui_out_text (uiout
, "\n");
3523 if (b
->thread
!= -1)
3525 /* FIXME should make an annotation for this */
3526 ui_out_text (uiout
, "\tstop only in thread ");
3527 ui_out_field_int (uiout
, "thread", b
->thread
);
3528 ui_out_text (uiout
, "\n");
3531 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3533 /* FIXME should make an annotation for this */
3534 if (ep_is_catchpoint (b
))
3535 ui_out_text (uiout
, "\tcatchpoint");
3537 ui_out_text (uiout
, "\tbreakpoint");
3538 ui_out_text (uiout
, " already hit ");
3539 ui_out_field_int (uiout
, "times", b
->hit_count
);
3540 if (b
->hit_count
== 1)
3541 ui_out_text (uiout
, " time\n");
3543 ui_out_text (uiout
, " times\n");
3546 /* Output the count also if it is zero, but only if this is
3547 mi. FIXME: Should have a better test for this. */
3548 if (ui_out_is_mi_like_p (uiout
))
3549 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3550 ui_out_field_int (uiout
, "times", b
->hit_count
);
3552 if (b
->ignore_count
)
3555 ui_out_text (uiout
, "\tignore next ");
3556 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3557 ui_out_text (uiout
, " hits\n");
3560 if ((l
= b
->commands
))
3562 struct cleanup
*script_chain
;
3565 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3566 print_command_lines (uiout
, l
, 4);
3567 do_cleanups (script_chain
);
3569 do_cleanups (bkpt_chain
);
3570 do_cleanups (old_chain
);
3573 struct captured_breakpoint_query_args
3579 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3581 struct captured_breakpoint_query_args
*args
= data
;
3582 struct breakpoint
*b
;
3583 CORE_ADDR dummy_addr
= 0;
3586 if (args
->bnum
== b
->number
)
3588 print_one_breakpoint (b
, &dummy_addr
);
3596 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
)
3598 struct captured_breakpoint_query_args args
;
3600 /* For the moment we don't trust print_one_breakpoint() to not throw
3602 return catch_exceptions (uiout
, do_captured_breakpoint_query
, &args
,
3603 NULL
, RETURN_MASK_ALL
);
3606 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3607 catchpoints, et.al.). */
3610 user_settable_breakpoint (const struct breakpoint
*b
)
3612 return (b
->type
== bp_breakpoint
3613 || b
->type
== bp_catch_load
3614 || b
->type
== bp_catch_unload
3615 || b
->type
== bp_catch_fork
3616 || b
->type
== bp_catch_vfork
3617 || b
->type
== bp_catch_exec
3618 || b
->type
== bp_catch_catch
3619 || b
->type
== bp_catch_throw
3620 || b
->type
== bp_hardware_breakpoint
3621 || b
->type
== bp_watchpoint
3622 || b
->type
== bp_read_watchpoint
3623 || b
->type
== bp_access_watchpoint
3624 || b
->type
== bp_hardware_watchpoint
);
3627 /* Print information on user settable breakpoint (watchpoint, etc)
3628 number BNUM. If BNUM is -1 print all user settable breakpoints.
3629 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3632 breakpoint_1 (int bnum
, int allflag
)
3634 struct breakpoint
*b
;
3635 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3636 int nr_printable_breakpoints
;
3637 struct cleanup
*bkpttbl_chain
;
3639 /* Compute the number of rows in the table. */
3640 nr_printable_breakpoints
= 0;
3643 || bnum
== b
->number
)
3645 if (allflag
|| user_settable_breakpoint (b
))
3646 nr_printable_breakpoints
++;
3651 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3655 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3658 if (nr_printable_breakpoints
> 0)
3659 annotate_breakpoints_headers ();
3660 if (nr_printable_breakpoints
> 0)
3662 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3663 if (nr_printable_breakpoints
> 0)
3665 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3666 if (nr_printable_breakpoints
> 0)
3668 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3669 if (nr_printable_breakpoints
> 0)
3671 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3674 if (nr_printable_breakpoints
> 0)
3676 if (TARGET_ADDR_BIT
<= 32)
3677 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3679 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3681 if (nr_printable_breakpoints
> 0)
3683 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3684 ui_out_table_body (uiout
);
3685 if (nr_printable_breakpoints
> 0)
3686 annotate_breakpoints_table ();
3690 || bnum
== b
->number
)
3692 /* We only print out user settable breakpoints unless the
3694 if (allflag
|| user_settable_breakpoint (b
))
3695 print_one_breakpoint (b
, &last_addr
);
3698 do_cleanups (bkpttbl_chain
);
3700 if (nr_printable_breakpoints
== 0)
3703 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3705 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3710 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3711 that a comparison of an unsigned with -1 is always false. */
3712 if (last_addr
!= (CORE_ADDR
) -1)
3713 set_next_address (last_addr
);
3716 /* FIXME? Should this be moved up so that it is only called when
3717 there have been breakpoints? */
3718 annotate_breakpoints_table_end ();
3722 breakpoints_info (char *bnum_exp
, int from_tty
)
3727 bnum
= parse_and_eval_long (bnum_exp
);
3729 breakpoint_1 (bnum
, 0);
3733 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3738 bnum
= parse_and_eval_long (bnum_exp
);
3740 breakpoint_1 (bnum
, 1);
3743 /* Print a message describing any breakpoints set at PC. */
3746 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
)
3749 struct breakpoint
*b
;
3752 if (b
->loc
->address
== pc
) /* address match / overlay match */
3753 if (!overlay_debugging
|| b
->loc
->section
== section
)
3757 printf_filtered ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
3759 if (b
->loc
->address
== pc
) /* address match / overlay match */
3760 if (!overlay_debugging
|| b
->loc
->section
== section
)
3763 printf_filtered ("%d%s%s ",
3765 ((b
->enable_state
== bp_disabled
||
3766 b
->enable_state
== bp_shlib_disabled
||
3767 b
->enable_state
== bp_call_disabled
)
3769 : b
->enable_state
== bp_permanent
3773 : ((others
== 1) ? " and" : ""));
3775 printf_filtered ("also set at pc ");
3776 print_address_numeric (pc
, 1, gdb_stdout
);
3777 printf_filtered (".\n");
3781 /* Set the default place to put a breakpoint
3782 for the `break' command with no arguments. */
3785 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3788 default_breakpoint_valid
= valid
;
3789 default_breakpoint_address
= addr
;
3790 default_breakpoint_symtab
= symtab
;
3791 default_breakpoint_line
= line
;
3794 /* Return true iff it is meaningful to use the address member of
3795 BPT. For some breakpoint types, the address member is irrelevant
3796 and it makes no sense to attempt to compare it to other addresses
3797 (or use it for any other purpose either).
3799 More specifically, each of the following breakpoint types will always
3800 have a zero valued address and we don't want check_duplicates() to mark
3801 breakpoints of any of these types to be a duplicate of an actual
3802 breakpoint at address zero:
3805 bp_hardware_watchpoint
3807 bp_access_watchpoint
3814 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3816 enum bptype type
= bpt
->type
;
3818 return (type
!= bp_watchpoint
3819 && type
!= bp_hardware_watchpoint
3820 && type
!= bp_read_watchpoint
3821 && type
!= bp_access_watchpoint
3822 && type
!= bp_catch_exec
3823 && type
!= bp_longjmp_resume
3824 && type
!= bp_catch_fork
3825 && type
!= bp_catch_vfork
);
3828 /* Rescan breakpoints at the same address and section as BPT,
3829 marking the first one as "first" and any others as "duplicates".
3830 This is so that the bpt instruction is only inserted once.
3831 If we have a permanent breakpoint at the same place as BPT, make
3832 that one the official one, and the rest as duplicates. */
3835 check_duplicates (struct breakpoint
*bpt
)
3837 struct bp_location
*b
;
3839 struct bp_location
*perm_bp
= 0;
3840 CORE_ADDR address
= bpt
->loc
->address
;
3841 asection
*section
= bpt
->loc
->section
;
3843 if (! breakpoint_address_is_meaningful (bpt
))
3846 ALL_BP_LOCATIONS (b
)
3847 if (b
->owner
->enable_state
!= bp_disabled
3848 && b
->owner
->enable_state
!= bp_shlib_disabled
3849 && b
->owner
->enable_state
!= bp_call_disabled
3850 && b
->address
== address
/* address / overlay match */
3851 && (!overlay_debugging
|| b
->section
== section
)
3852 && breakpoint_address_is_meaningful (b
->owner
))
3854 /* Have we found a permanent breakpoint? */
3855 if (b
->owner
->enable_state
== bp_permanent
)
3862 b
->duplicate
= count
> 1;
3865 /* If we found a permanent breakpoint at this address, go over the
3866 list again and declare all the other breakpoints there to be the
3870 perm_bp
->duplicate
= 0;
3872 /* Permanent breakpoint should always be inserted. */
3873 if (! perm_bp
->inserted
)
3874 internal_error (__FILE__
, __LINE__
,
3875 "allegedly permanent breakpoint is not "
3876 "actually inserted");
3878 ALL_BP_LOCATIONS (b
)
3881 if (b
->owner
->enable_state
!= bp_disabled
3882 && b
->owner
->enable_state
!= bp_shlib_disabled
3883 && b
->owner
->enable_state
!= bp_call_disabled
3884 && b
->address
== address
/* address / overlay match */
3885 && (!overlay_debugging
|| b
->section
== section
)
3886 && breakpoint_address_is_meaningful (b
->owner
))
3889 internal_error (__FILE__
, __LINE__
,
3890 "another breakpoint was inserted on top of "
3891 "a permanent breakpoint");
3900 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
3901 int bnum
, int have_bnum
)
3906 strcpy (astr1
, local_hex_string_custom ((unsigned long) from_addr
, "08l"));
3907 strcpy (astr2
, local_hex_string_custom ((unsigned long) to_addr
, "08l"));
3909 warning ("Breakpoint %d address previously adjusted from %s to %s.",
3910 bnum
, astr1
, astr2
);
3912 warning ("Breakpoint address adjusted from %s to %s.", astr1
, astr2
);
3915 /* Adjust a breakpoint's address to account for architectural constraints
3916 on breakpoint placement. Return the adjusted address. Note: Very
3917 few targets require this kind of adjustment. For most targets,
3918 this function is simply the identity function. */
3921 adjust_breakpoint_address (CORE_ADDR bpaddr
)
3923 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
3925 /* Very few targets need any kind of breakpoint adjustment. */
3930 CORE_ADDR adjusted_bpaddr
;
3932 /* Some targets have architectural constraints on the placement
3933 of breakpoint instructions. Obtain the adjusted address. */
3934 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
3937 /* An adjusted breakpoint address can significantly alter
3938 a user's expectations. Print a warning if an adjustment
3940 if (adjusted_bpaddr
!= bpaddr
)
3941 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
3943 return adjusted_bpaddr
;
3947 /* Allocate a struct bp_location. */
3949 static struct bp_location
*
3950 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
)
3952 struct bp_location
*loc
, *loc_p
;
3954 loc
= xmalloc (sizeof (struct bp_location
));
3955 memset (loc
, 0, sizeof (*loc
));
3965 case bp_longjmp_resume
:
3966 case bp_step_resume
:
3967 case bp_through_sigtramp
:
3968 case bp_watchpoint_scope
:
3970 case bp_shlib_event
:
3971 case bp_thread_event
:
3972 case bp_overlay_event
:
3974 case bp_catch_unload
:
3975 loc
->loc_type
= bp_loc_software_breakpoint
;
3977 case bp_hardware_breakpoint
:
3978 loc
->loc_type
= bp_loc_hardware_breakpoint
;
3980 case bp_hardware_watchpoint
:
3981 case bp_read_watchpoint
:
3982 case bp_access_watchpoint
:
3983 loc
->loc_type
= bp_loc_hardware_watchpoint
;
3987 case bp_catch_vfork
:
3989 case bp_catch_catch
:
3990 case bp_catch_throw
:
3991 loc
->loc_type
= bp_loc_other
;
3994 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
3997 /* Add this breakpoint to the end of the chain. */
3999 loc_p
= bp_location_chain
;
4001 bp_location_chain
= loc
;
4005 loc_p
= loc_p
->next
;
4012 /* set_raw_breakpoint() is a low level routine for allocating and
4013 partially initializing a breakpoint of type BPTYPE. The newly
4014 created breakpoint's address, section, source file name, and line
4015 number are provided by SAL. The newly created and partially
4016 initialized breakpoint is added to the breakpoint chain and
4017 is also returned as the value of this function.
4019 It is expected that the caller will complete the initialization of
4020 the newly created breakpoint struct as well as output any status
4021 information regarding the creation of a new breakpoint. In
4022 particular, set_raw_breakpoint() does NOT set the breakpoint
4023 number! Care should be taken to not allow an error() to occur
4024 prior to completing the initialization of the breakpoint. If this
4025 should happen, a bogus breakpoint will be left on the chain. */
4028 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4030 struct breakpoint
*b
, *b1
;
4032 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4033 memset (b
, 0, sizeof (*b
));
4034 b
->loc
= allocate_bp_location (b
, bptype
);
4035 b
->loc
->requested_address
= sal
.pc
;
4036 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
);
4037 if (sal
.symtab
== NULL
)
4038 b
->source_file
= NULL
;
4040 b
->source_file
= savestring (sal
.symtab
->filename
,
4041 strlen (sal
.symtab
->filename
));
4042 b
->loc
->section
= sal
.section
;
4044 b
->language
= current_language
->la_language
;
4045 b
->input_radix
= input_radix
;
4047 b
->line_number
= sal
.line
;
4048 b
->enable_state
= bp_enabled
;
4051 b
->ignore_count
= 0;
4053 b
->frame_id
= null_frame_id
;
4054 b
->dll_pathname
= NULL
;
4055 b
->triggered_dll_pathname
= NULL
;
4056 b
->forked_inferior_pid
= 0;
4057 b
->exec_pathname
= NULL
;
4060 /* Add this breakpoint to the end of the chain
4061 so that a list of breakpoints will come out in order
4062 of increasing numbers. */
4064 b1
= breakpoint_chain
;
4066 breakpoint_chain
= b
;
4074 check_duplicates (b
);
4075 breakpoints_changed ();
4081 /* Note that the breakpoint object B describes a permanent breakpoint
4082 instruction, hard-wired into the inferior's code. */
4084 make_breakpoint_permanent (struct breakpoint
*b
)
4086 b
->enable_state
= bp_permanent
;
4088 /* By definition, permanent breakpoints are already present in the code. */
4089 b
->loc
->inserted
= 1;
4092 static struct breakpoint
*
4093 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4095 static int internal_breakpoint_number
= -1;
4096 struct symtab_and_line sal
;
4097 struct breakpoint
*b
;
4099 init_sal (&sal
); /* initialize to zeroes */
4102 sal
.section
= find_pc_overlay (sal
.pc
);
4104 b
= set_raw_breakpoint (sal
, type
);
4105 b
->number
= internal_breakpoint_number
--;
4106 b
->disposition
= disp_donttouch
;
4113 create_longjmp_breakpoint (char *func_name
)
4115 struct breakpoint
*b
;
4116 struct minimal_symbol
*m
;
4118 if (func_name
== NULL
)
4119 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
4122 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4125 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4128 b
->enable_state
= bp_disabled
;
4131 b
->addr_string
= xstrdup (func_name
);
4134 /* Call this routine when stepping and nexting to enable a breakpoint
4135 if we do a longjmp(). When we hit that breakpoint, call
4136 set_longjmp_resume_breakpoint() to figure out where we are going. */
4139 enable_longjmp_breakpoint (void)
4141 struct breakpoint
*b
;
4144 if (b
->type
== bp_longjmp
)
4146 b
->enable_state
= bp_enabled
;
4147 check_duplicates (b
);
4152 disable_longjmp_breakpoint (void)
4154 struct breakpoint
*b
;
4157 if (b
->type
== bp_longjmp
4158 || b
->type
== bp_longjmp_resume
)
4160 b
->enable_state
= bp_disabled
;
4161 check_duplicates (b
);
4166 create_overlay_event_breakpoint (char *func_name
)
4168 struct breakpoint
*b
;
4169 struct minimal_symbol
*m
;
4171 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4174 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4176 b
->addr_string
= xstrdup (func_name
);
4178 if (overlay_debugging
== ovly_auto
)
4180 b
->enable_state
= bp_enabled
;
4181 overlay_events_enabled
= 1;
4185 b
->enable_state
= bp_disabled
;
4186 overlay_events_enabled
= 0;
4191 enable_overlay_breakpoints (void)
4193 struct breakpoint
*b
;
4196 if (b
->type
== bp_overlay_event
)
4198 b
->enable_state
= bp_enabled
;
4199 check_duplicates (b
);
4200 overlay_events_enabled
= 1;
4205 disable_overlay_breakpoints (void)
4207 struct breakpoint
*b
;
4210 if (b
->type
== bp_overlay_event
)
4212 b
->enable_state
= bp_disabled
;
4213 check_duplicates (b
);
4214 overlay_events_enabled
= 0;
4219 create_thread_event_breakpoint (CORE_ADDR address
)
4221 struct breakpoint
*b
;
4223 b
= create_internal_breakpoint (address
, bp_thread_event
);
4225 b
->enable_state
= bp_enabled
;
4226 /* addr_string has to be used or breakpoint_re_set will delete me. */
4227 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->loc
->address
));
4233 remove_thread_event_breakpoints (void)
4235 struct breakpoint
*b
, *temp
;
4237 ALL_BREAKPOINTS_SAFE (b
, temp
)
4238 if (b
->type
== bp_thread_event
)
4239 delete_breakpoint (b
);
4244 remove_solib_event_breakpoints (void)
4246 struct breakpoint
*b
, *temp
;
4248 ALL_BREAKPOINTS_SAFE (b
, temp
)
4249 if (b
->type
== bp_shlib_event
)
4250 delete_breakpoint (b
);
4254 create_solib_event_breakpoint (CORE_ADDR address
)
4256 struct breakpoint
*b
;
4258 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4262 /* Disable any breakpoints that are on code in shared libraries. Only
4263 apply to enabled breakpoints, disabled ones can just stay disabled. */
4266 disable_breakpoints_in_shlibs (int silent
)
4268 struct breakpoint
*b
;
4269 int disabled_shlib_breaks
= 0;
4271 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4274 #if defined (PC_SOLIB)
4275 if (((b
->type
== bp_breakpoint
) ||
4276 (b
->type
== bp_hardware_breakpoint
)) &&
4277 breakpoint_enabled (b
) &&
4278 !b
->loc
->duplicate
&&
4279 PC_SOLIB (b
->loc
->address
))
4281 b
->enable_state
= bp_shlib_disabled
;
4284 if (!disabled_shlib_breaks
)
4286 target_terminal_ours_for_output ();
4287 warning ("Temporarily disabling shared library breakpoints:");
4289 disabled_shlib_breaks
= 1;
4290 warning ("breakpoint #%d ", b
->number
);
4297 /* Try to reenable any breakpoints in shared libraries. */
4299 re_enable_breakpoints_in_shlibs (void)
4301 struct breakpoint
*b
;
4304 if (b
->enable_state
== bp_shlib_disabled
)
4308 /* Do not reenable the breakpoint if the shared library
4309 is still not mapped in. */
4310 lib
= PC_SOLIB (b
->loc
->address
);
4311 if (lib
!= NULL
&& target_read_memory (b
->loc
->address
, buf
, 1) == 0)
4312 b
->enable_state
= bp_enabled
;
4319 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
4320 char *cond_string
, enum bptype bp_kind
)
4322 struct breakpoint
*b
;
4323 struct symtabs_and_lines sals
;
4324 struct cleanup
*old_chain
;
4325 struct cleanup
*canonical_strings_chain
= NULL
;
4326 char *addr_start
= hookname
;
4327 char *addr_end
= NULL
;
4328 char **canonical
= (char **) NULL
;
4329 int thread
= -1; /* All threads. */
4331 /* Set a breakpoint on the specified hook. */
4332 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
, 0, &canonical
, NULL
);
4333 addr_end
= hookname
;
4335 if (sals
.nelts
== 0)
4337 warning ("Unable to set a breakpoint on dynamic linker callback.");
4338 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4339 warning ("GDB will be unable to track shl_load/shl_unload calls");
4342 if (sals
.nelts
!= 1)
4344 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4345 warning ("GDB will be unable to track shl_load/shl_unload calls");
4349 /* Make sure that all storage allocated in decode_line_1 gets freed
4350 in case the following errors out. */
4351 old_chain
= make_cleanup (xfree
, sals
.sals
);
4352 if (canonical
!= (char **) NULL
)
4354 make_cleanup (xfree
, canonical
);
4355 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
4356 if (canonical
[0] != NULL
)
4357 make_cleanup (xfree
, canonical
[0]);
4360 resolve_sal_pc (&sals
.sals
[0]);
4362 /* Remove the canonical strings from the cleanup, they are needed below. */
4363 if (canonical
!= (char **) NULL
)
4364 discard_cleanups (canonical_strings_chain
);
4366 b
= set_raw_breakpoint (sals
.sals
[0], bp_kind
);
4367 set_breakpoint_count (breakpoint_count
+ 1);
4368 b
->number
= breakpoint_count
;
4370 b
->cond_string
= (cond_string
== NULL
) ?
4371 NULL
: savestring (cond_string
, strlen (cond_string
));
4374 if (canonical
!= (char **) NULL
&& canonical
[0] != NULL
)
4375 b
->addr_string
= canonical
[0];
4376 else if (addr_start
)
4377 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
4379 b
->enable_state
= bp_enabled
;
4380 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4382 if (dll_pathname
== NULL
)
4383 b
->dll_pathname
= NULL
;
4386 b
->dll_pathname
= (char *) xmalloc (strlen (dll_pathname
) + 1);
4387 strcpy (b
->dll_pathname
, dll_pathname
);
4391 do_cleanups (old_chain
);
4395 create_solib_load_event_breakpoint (char *hookname
, int tempflag
,
4396 char *dll_pathname
, char *cond_string
)
4398 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4399 cond_string
, bp_catch_load
);
4403 create_solib_unload_event_breakpoint (char *hookname
, int tempflag
,
4404 char *dll_pathname
, char *cond_string
)
4406 solib_load_unload_1 (hookname
,tempflag
, dll_pathname
,
4407 cond_string
, bp_catch_unload
);
4411 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4412 enum bptype bp_kind
)
4414 struct symtab_and_line sal
;
4415 struct breakpoint
*b
;
4416 int thread
= -1; /* All threads. */
4423 b
= set_raw_breakpoint (sal
, bp_kind
);
4424 set_breakpoint_count (breakpoint_count
+ 1);
4425 b
->number
= breakpoint_count
;
4427 b
->cond_string
= (cond_string
== NULL
) ?
4428 NULL
: savestring (cond_string
, strlen (cond_string
));
4430 b
->addr_string
= NULL
;
4431 b
->enable_state
= bp_enabled
;
4432 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4433 b
->forked_inferior_pid
= 0;
4439 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4441 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4445 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4447 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4451 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4453 struct symtab_and_line sal
;
4454 struct breakpoint
*b
;
4455 int thread
= -1; /* All threads. */
4462 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4463 set_breakpoint_count (breakpoint_count
+ 1);
4464 b
->number
= breakpoint_count
;
4466 b
->cond_string
= (cond_string
== NULL
) ?
4467 NULL
: savestring (cond_string
, strlen (cond_string
));
4469 b
->addr_string
= NULL
;
4470 b
->enable_state
= bp_enabled
;
4471 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4477 hw_breakpoint_used_count (void)
4479 struct breakpoint
*b
;
4484 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4492 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4494 struct breakpoint
*b
;
4497 *other_type_used
= 0;
4500 if (breakpoint_enabled (b
))
4502 if (b
->type
== type
)
4504 else if ((b
->type
== bp_hardware_watchpoint
||
4505 b
->type
== bp_read_watchpoint
||
4506 b
->type
== bp_access_watchpoint
))
4507 *other_type_used
= 1;
4513 /* Call this after hitting the longjmp() breakpoint. Use this to set
4514 a new breakpoint at the target of the jmp_buf.
4516 FIXME - This ought to be done by setting a temporary breakpoint
4517 that gets deleted automatically... */
4520 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_id frame_id
)
4522 struct breakpoint
*b
;
4525 if (b
->type
== bp_longjmp_resume
)
4527 b
->loc
->requested_address
= pc
;
4528 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
);
4529 b
->enable_state
= bp_enabled
;
4530 b
->frame_id
= frame_id
;
4531 check_duplicates (b
);
4537 disable_watchpoints_before_interactive_call_start (void)
4539 struct breakpoint
*b
;
4543 if (((b
->type
== bp_watchpoint
)
4544 || (b
->type
== bp_hardware_watchpoint
)
4545 || (b
->type
== bp_read_watchpoint
)
4546 || (b
->type
== bp_access_watchpoint
)
4547 || ep_is_exception_catchpoint (b
))
4548 && breakpoint_enabled (b
))
4550 b
->enable_state
= bp_call_disabled
;
4551 check_duplicates (b
);
4557 enable_watchpoints_after_interactive_call_stop (void)
4559 struct breakpoint
*b
;
4563 if (((b
->type
== bp_watchpoint
)
4564 || (b
->type
== bp_hardware_watchpoint
)
4565 || (b
->type
== bp_read_watchpoint
)
4566 || (b
->type
== bp_access_watchpoint
)
4567 || ep_is_exception_catchpoint (b
))
4568 && (b
->enable_state
== bp_call_disabled
))
4570 b
->enable_state
= bp_enabled
;
4571 check_duplicates (b
);
4577 /* Set a breakpoint that will evaporate an end of command
4578 at address specified by SAL.
4579 Restrict it to frame FRAME if FRAME is nonzero. */
4582 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4585 struct breakpoint
*b
;
4586 b
= set_raw_breakpoint (sal
, type
);
4587 b
->enable_state
= bp_enabled
;
4588 b
->disposition
= disp_donttouch
;
4589 b
->frame_id
= frame_id
;
4591 /* If we're debugging a multi-threaded program, then we
4592 want momentary breakpoints to be active in only a
4593 single thread of control. */
4594 if (in_thread_list (inferior_ptid
))
4595 b
->thread
= pid_to_thread_id (inferior_ptid
);
4601 /* Tell the user we have just set a breakpoint B. */
4604 mention (struct breakpoint
*b
)
4607 struct cleanup
*old_chain
, *ui_out_chain
;
4608 struct ui_stream
*stb
;
4610 stb
= ui_out_stream_new (uiout
);
4611 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4613 /* FIXME: This is misplaced; mention() is called by things (like hitting a
4614 watchpoint) other than breakpoint creation. It should be possible to
4615 clean this up and at the same time replace the random calls to
4616 breakpoint_changed with this hook, as has already been done for
4617 delete_breakpoint_hook and so on. */
4618 if (create_breakpoint_hook
)
4619 create_breakpoint_hook (b
);
4620 breakpoint_create_event (b
->number
);
4622 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4623 b
->ops
->print_mention (b
);
4628 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b
->number
);
4631 ui_out_text (uiout
, "Watchpoint ");
4632 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4633 ui_out_field_int (uiout
, "number", b
->number
);
4634 ui_out_text (uiout
, ": ");
4635 print_expression (b
->exp
, stb
->stream
);
4636 ui_out_field_stream (uiout
, "exp", stb
);
4637 do_cleanups (ui_out_chain
);
4639 case bp_hardware_watchpoint
:
4640 ui_out_text (uiout
, "Hardware watchpoint ");
4641 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4642 ui_out_field_int (uiout
, "number", b
->number
);
4643 ui_out_text (uiout
, ": ");
4644 print_expression (b
->exp
, stb
->stream
);
4645 ui_out_field_stream (uiout
, "exp", stb
);
4646 do_cleanups (ui_out_chain
);
4648 case bp_read_watchpoint
:
4649 ui_out_text (uiout
, "Hardware read watchpoint ");
4650 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4651 ui_out_field_int (uiout
, "number", b
->number
);
4652 ui_out_text (uiout
, ": ");
4653 print_expression (b
->exp
, stb
->stream
);
4654 ui_out_field_stream (uiout
, "exp", stb
);
4655 do_cleanups (ui_out_chain
);
4657 case bp_access_watchpoint
:
4658 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4659 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4660 ui_out_field_int (uiout
, "number", b
->number
);
4661 ui_out_text (uiout
, ": ");
4662 print_expression (b
->exp
, stb
->stream
);
4663 ui_out_field_stream (uiout
, "exp", stb
);
4664 do_cleanups (ui_out_chain
);
4667 if (ui_out_is_mi_like_p (uiout
))
4672 printf_filtered ("Breakpoint %d", b
->number
);
4675 case bp_hardware_breakpoint
:
4676 if (ui_out_is_mi_like_p (uiout
))
4681 printf_filtered ("Hardware assisted breakpoint %d", b
->number
);
4685 case bp_catch_unload
:
4686 printf_filtered ("Catchpoint %d (%s %s)",
4688 (b
->type
== bp_catch_load
) ? "load" : "unload",
4689 (b
->dll_pathname
!= NULL
) ?
4690 b
->dll_pathname
: "<any library>");
4693 case bp_catch_vfork
:
4694 printf_filtered ("Catchpoint %d (%s)",
4696 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4699 printf_filtered ("Catchpoint %d (exec)",
4702 case bp_catch_catch
:
4703 case bp_catch_throw
:
4704 printf_filtered ("Catchpoint %d (%s)",
4706 (b
->type
== bp_catch_catch
) ? "catch" : "throw");
4712 case bp_longjmp_resume
:
4713 case bp_step_resume
:
4714 case bp_through_sigtramp
:
4716 case bp_watchpoint_scope
:
4717 case bp_shlib_event
:
4718 case bp_thread_event
:
4719 case bp_overlay_event
:
4725 if (addressprint
|| b
->source_file
== NULL
)
4727 printf_filtered (" at ");
4728 print_address_numeric (b
->loc
->address
, 1, gdb_stdout
);
4731 printf_filtered (": file %s, line %d.",
4732 b
->source_file
, b
->line_number
);
4734 do_cleanups (old_chain
);
4735 if (ui_out_is_mi_like_p (uiout
))
4737 printf_filtered ("\n");
4741 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4742 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4743 COND[i] and COND_STRING[i] values.
4745 NOTE: If the function succeeds, the caller is expected to cleanup
4746 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4747 array contents). If the function fails (error() is called), the
4748 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4749 COND and SALS arrays and each of those arrays contents. */
4752 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
4753 struct expression
**cond
, char **cond_string
,
4754 enum bptype type
, enum bpdisp disposition
,
4755 int thread
, int ignore_count
, int from_tty
)
4757 if (type
== bp_hardware_breakpoint
)
4759 int i
= hw_breakpoint_used_count ();
4760 int target_resources_ok
=
4761 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
4763 if (target_resources_ok
== 0)
4764 error ("No hardware breakpoint support in the target.");
4765 else if (target_resources_ok
< 0)
4766 error ("Hardware breakpoints used exceeds limit.");
4769 /* Now set all the breakpoints. */
4772 for (i
= 0; i
< sals
.nelts
; i
++)
4774 struct breakpoint
*b
;
4775 struct symtab_and_line sal
= sals
.sals
[i
];
4778 describe_other_breakpoints (sal
.pc
, sal
.section
);
4780 b
= set_raw_breakpoint (sal
, type
);
4781 set_breakpoint_count (breakpoint_count
+ 1);
4782 b
->number
= breakpoint_count
;
4786 b
->addr_string
= addr_string
[i
];
4788 /* addr_string has to be used or breakpoint_re_set will delete
4790 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->loc
->address
));
4791 b
->cond_string
= cond_string
[i
];
4792 b
->ignore_count
= ignore_count
;
4793 b
->enable_state
= bp_enabled
;
4794 b
->disposition
= disposition
;
4800 /* Parse ARG which is assumed to be a SAL specification possibly
4801 followed by conditionals. On return, SALS contains an array of SAL
4802 addresses found. ADDR_STRING contains a vector of (canonical)
4803 address strings. ARG points to the end of the SAL. */
4806 parse_breakpoint_sals (char **address
,
4807 struct symtabs_and_lines
*sals
,
4808 char ***addr_string
)
4810 char *addr_start
= *address
;
4811 *addr_string
= NULL
;
4812 /* If no arg given, or if first arg is 'if ', use the default
4814 if ((*address
) == NULL
4815 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
4817 if (default_breakpoint_valid
)
4819 struct symtab_and_line sal
;
4820 init_sal (&sal
); /* initialize to zeroes */
4821 sals
->sals
= (struct symtab_and_line
*)
4822 xmalloc (sizeof (struct symtab_and_line
));
4823 sal
.pc
= default_breakpoint_address
;
4824 sal
.line
= default_breakpoint_line
;
4825 sal
.symtab
= default_breakpoint_symtab
;
4826 sal
.section
= find_pc_overlay (sal
.pc
);
4827 sals
->sals
[0] = sal
;
4831 error ("No default breakpoint address now.");
4835 /* Force almost all breakpoints to be in terms of the
4836 current_source_symtab (which is decode_line_1's default). This
4837 should produce the results we want almost all of the time while
4838 leaving default_breakpoint_* alone.
4839 ObjC: However, don't match an Objective-C method name which
4840 may have a '+' or '-' succeeded by a '[' */
4842 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
4844 if (default_breakpoint_valid
4846 || ((strchr ("+-", (*address
)[0]) != NULL
)
4847 && ((*address
)[1] != '['))))
4848 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
4849 default_breakpoint_line
, addr_string
, NULL
);
4851 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0, addr_string
, NULL
);
4853 /* For any SAL that didn't have a canonical string, fill one in. */
4854 if (sals
->nelts
> 0 && *addr_string
== NULL
)
4855 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
4856 if (addr_start
!= (*address
))
4859 for (i
= 0; i
< sals
->nelts
; i
++)
4861 /* Add the string if not present. */
4862 if ((*addr_string
)[i
] == NULL
)
4863 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
4869 /* Convert each SAL into a real PC. Verify that the PC can be
4870 inserted as a breakpoint. If it can't throw an error. */
4873 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
4877 for (i
= 0; i
< sals
->nelts
; i
++)
4879 resolve_sal_pc (&sals
->sals
[i
]);
4881 /* It's possible for the PC to be nonzero, but still an illegal
4882 value on some targets.
4884 For example, on HP-UX if you start gdb, and before running the
4885 inferior you try to set a breakpoint on a shared library function
4886 "foo" where the inferior doesn't call "foo" directly but does
4887 pass its address to another function call, then we do find a
4888 minimal symbol for the "foo", but it's address is invalid.
4889 (Appears to be an index into a table that the loader sets up
4890 when the inferior is run.)
4892 Give the target a chance to bless sals.sals[i].pc before we
4893 try to make a breakpoint for it. */
4894 if (PC_REQUIRES_RUN_BEFORE_USE (sals
->sals
[i
].pc
))
4896 if (address
== NULL
)
4897 error ("Cannot break without a running program.");
4899 error ("Cannot break on %s without a running program.",
4905 /* Set a breakpoint according to ARG (function, linenum or *address)
4906 flag: first bit : 0 non-temporary, 1 temporary.
4907 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
4910 break_command_1 (char *arg
, int flag
, int from_tty
)
4912 int tempflag
, hardwareflag
;
4913 struct symtabs_and_lines sals
;
4914 struct expression
**cond
= 0;
4915 /* Pointers in arg to the start, and one past the end, of the
4917 char **cond_string
= (char **) NULL
;
4918 char *addr_start
= arg
;
4920 struct cleanup
*old_chain
;
4921 struct cleanup
*breakpoint_chain
= NULL
;
4924 int ignore_count
= 0;
4926 hardwareflag
= flag
& BP_HARDWAREFLAG
;
4927 tempflag
= flag
& BP_TEMPFLAG
;
4932 parse_breakpoint_sals (&arg
, &sals
, &addr_string
);
4937 /* Create a chain of things that always need to be cleaned up. */
4938 old_chain
= make_cleanup (null_cleanup
, 0);
4940 /* Make sure that all storage allocated to SALS gets freed. */
4941 make_cleanup (xfree
, sals
.sals
);
4943 /* Cleanup the addr_string array but not its contents. */
4944 make_cleanup (xfree
, addr_string
);
4946 /* Allocate space for all the cond expressions. */
4947 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
4948 make_cleanup (xfree
, cond
);
4950 /* Allocate space for all the cond strings. */
4951 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
4952 make_cleanup (xfree
, cond_string
);
4954 /* ----------------------------- SNIP -----------------------------
4955 Anything added to the cleanup chain beyond this point is assumed
4956 to be part of a breakpoint. If the breakpoint create succeeds
4957 then the memory is not reclaimed. */
4958 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
4960 /* Mark the contents of the addr_string for cleanup. These go on
4961 the breakpoint_chain and only occure if the breakpoint create
4963 for (i
= 0; i
< sals
.nelts
; i
++)
4965 if (addr_string
[i
] != NULL
)
4966 make_cleanup (xfree
, addr_string
[i
]);
4969 /* Resolve all line numbers to PC's and verify that the addresses
4970 are ok for the target. */
4971 breakpoint_sals_to_pc (&sals
, addr_start
);
4973 /* Verify that condition can be parsed, before setting any
4974 breakpoints. Allocate a separate condition expression for each
4976 thread
= -1; /* No specific thread yet */
4977 for (i
= 0; i
< sals
.nelts
; i
++)
4984 char *cond_start
= NULL
;
4985 char *cond_end
= NULL
;
4986 while (*tok
== ' ' || *tok
== '\t')
4991 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
4994 toklen
= end_tok
- tok
;
4996 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
4998 tok
= cond_start
= end_tok
+ 1;
4999 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
5000 make_cleanup (xfree
, cond
[i
]);
5002 cond_string
[i
] = savestring (cond_start
, cond_end
- cond_start
);
5003 make_cleanup (xfree
, cond_string
[i
]);
5005 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5011 thread
= strtol (tok
, &tok
, 0);
5013 error ("Junk after thread keyword.");
5014 if (!valid_thread_id (thread
))
5015 error ("Unknown thread %d\n", thread
);
5018 error ("Junk at end of arguments.");
5022 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5023 hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
5024 tempflag
? disp_del
: disp_donttouch
,
5025 thread
, ignore_count
, from_tty
);
5029 warning ("Multiple breakpoints were set.");
5030 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5032 /* That's it. Discard the cleanups for data inserted into the
5034 discard_cleanups (breakpoint_chain
);
5035 /* But cleanup everything else. */
5036 do_cleanups (old_chain
);
5039 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
5040 linenum or *address) with COND and IGNORE_COUNT. */
5042 struct captured_breakpoint_args
5053 do_captured_breakpoint (void *data
)
5055 struct captured_breakpoint_args
*args
= data
;
5056 struct symtabs_and_lines sals
;
5057 struct expression
**cond
;
5058 struct cleanup
*old_chain
;
5059 struct cleanup
*breakpoint_chain
= NULL
;
5066 /* Parse the source and lines spec. Delay check that the expression
5067 didn't contain trailing garbage until after cleanups are in
5071 address_end
= args
->address
;
5073 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
);
5078 /* Create a chain of things at always need to be cleaned up. */
5079 old_chain
= make_cleanup (null_cleanup
, 0);
5081 /* Always have a addr_string array, even if it is empty. */
5082 make_cleanup (xfree
, addr_string
);
5084 /* Make sure that all storage allocated to SALS gets freed. */
5085 make_cleanup (xfree
, sals
.sals
);
5087 /* Allocate space for all the cond expressions. */
5088 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5089 make_cleanup (xfree
, cond
);
5091 /* Allocate space for all the cond strings. */
5092 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5093 make_cleanup (xfree
, cond_string
);
5095 /* ----------------------------- SNIP -----------------------------
5096 Anything added to the cleanup chain beyond this point is assumed
5097 to be part of a breakpoint. If the breakpoint create goes
5098 through then that memory is not cleaned up. */
5099 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5101 /* Mark the contents of the addr_string for cleanup. These go on
5102 the breakpoint_chain and only occure if the breakpoint create
5104 for (i
= 0; i
< sals
.nelts
; i
++)
5106 if (addr_string
[i
] != NULL
)
5107 make_cleanup (xfree
, addr_string
[i
]);
5110 /* Wait until now before checking for garbage at the end of the
5111 address. That way cleanups can take care of freeing any
5113 if (*address_end
!= '\0')
5114 error ("Garbage %s following breakpoint address", address_end
);
5116 /* Resolve all line numbers to PC's. */
5117 breakpoint_sals_to_pc (&sals
, args
->address
);
5119 /* Verify that conditions can be parsed, before setting any
5121 for (i
= 0; i
< sals
.nelts
; i
++)
5123 if (args
->condition
!= NULL
)
5125 char *tok
= args
->condition
;
5126 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
5128 error ("Garbage %s follows condition", tok
);
5129 make_cleanup (xfree
, cond
[i
]);
5130 cond_string
[i
] = xstrdup (args
->condition
);
5134 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5135 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
5136 args
->tempflag
? disp_del
: disp_donttouch
,
5137 args
->thread
, args
->ignore_count
, 0/*from-tty*/);
5139 /* That's it. Discard the cleanups for data inserted into the
5141 discard_cleanups (breakpoint_chain
);
5142 /* But cleanup everything else. */
5143 do_cleanups (old_chain
);
5148 gdb_breakpoint (char *address
, char *condition
,
5149 int hardwareflag
, int tempflag
,
5150 int thread
, int ignore_count
)
5152 struct captured_breakpoint_args args
;
5153 args
.address
= address
;
5154 args
.condition
= condition
;
5155 args
.hardwareflag
= hardwareflag
;
5156 args
.tempflag
= tempflag
;
5157 args
.thread
= thread
;
5158 args
.ignore_count
= ignore_count
;
5159 return catch_errors (do_captured_breakpoint
, &args
,
5160 NULL
, RETURN_MASK_ALL
);
5165 break_at_finish_at_depth_command_1 (char *arg
, int flag
, int from_tty
)
5167 struct frame_info
*frame
;
5168 CORE_ADDR low
, high
, selected_pc
= 0;
5169 char *extra_args
= NULL
;
5171 int extra_args_len
= 0, if_arg
= 0;
5174 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5177 if (default_breakpoint_valid
)
5179 if (deprecated_selected_frame
)
5181 selected_pc
= get_frame_pc (deprecated_selected_frame
);
5186 error ("No selected frame.");
5189 error ("No default breakpoint address now.");
5193 extra_args
= strchr (arg
, ' ');
5197 extra_args_len
= strlen (extra_args
);
5198 level_arg
= (char *) xmalloc (extra_args
- arg
);
5199 strncpy (level_arg
, arg
, extra_args
- arg
- 1);
5200 level_arg
[extra_args
- arg
- 1] = '\0';
5204 level_arg
= (char *) xmalloc (strlen (arg
) + 1);
5205 strcpy (level_arg
, arg
);
5208 frame
= parse_frame_specification (level_arg
);
5210 selected_pc
= get_frame_pc (frame
);
5217 extra_args_len
= strlen (arg
);
5222 if (find_pc_partial_function (selected_pc
, (char **) NULL
, &low
, &high
))
5226 addr_string
= xstrprintf ("*0x%s %s", paddr_nz (high
), extra_args
);
5228 addr_string
= xstrprintf ("*0x%s", paddr_nz (high
));
5229 break_command_1 (addr_string
, flag
, from_tty
);
5230 xfree (addr_string
);
5233 error ("No function contains the specified address");
5236 error ("Unable to set breakpoint at procedure exit");
5241 break_at_finish_command_1 (char *arg
, int flag
, int from_tty
)
5243 char *addr_string
, *break_string
, *beg_addr_string
;
5244 CORE_ADDR low
, high
;
5245 struct symtabs_and_lines sals
;
5246 struct symtab_and_line sal
;
5247 struct cleanup
*old_chain
;
5248 char *extra_args
= NULL
;
5249 int extra_args_len
= 0;
5253 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5255 if (default_breakpoint_valid
)
5257 if (deprecated_selected_frame
)
5259 addr_string
= xstrprintf ("*0x%s",
5260 paddr_nz (get_frame_pc (deprecated_selected_frame
)));
5265 error ("No selected frame.");
5268 error ("No default breakpoint address now.");
5272 addr_string
= (char *) xmalloc (strlen (arg
) + 1);
5273 strcpy (addr_string
, arg
);
5279 extra_args_len
= strlen (arg
);
5283 /* get the stuff after the function name or address */
5284 extra_args
= strchr (arg
, ' ');
5288 extra_args_len
= strlen (extra_args
);
5295 beg_addr_string
= addr_string
;
5296 sals
= decode_line_1 (&addr_string
, 1, (struct symtab
*) NULL
, 0,
5297 (char ***) NULL
, NULL
);
5299 xfree (beg_addr_string
);
5300 old_chain
= make_cleanup (xfree
, sals
.sals
);
5301 for (i
= 0; (i
< sals
.nelts
); i
++)
5304 if (find_pc_partial_function (sal
.pc
, (char **) NULL
, &low
, &high
))
5308 break_string
= xstrprintf ("*0x%s %s", paddr_nz (high
),
5311 break_string
= xstrprintf ("*0x%s", paddr_nz (high
));
5312 break_command_1 (break_string
, flag
, from_tty
);
5313 xfree (break_string
);
5316 error ("No function contains the specified address");
5320 warning ("Multiple breakpoints were set.\n");
5321 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5323 do_cleanups (old_chain
);
5327 /* Helper function for break_command_1 and disassemble_command. */
5330 resolve_sal_pc (struct symtab_and_line
*sal
)
5334 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5336 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5337 error ("No line %d in file \"%s\".",
5338 sal
->line
, sal
->symtab
->filename
);
5342 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5344 struct blockvector
*bv
;
5349 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &index
, sal
->symtab
);
5352 b
= BLOCKVECTOR_BLOCK (bv
, index
);
5353 sym
= block_function (b
);
5356 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5357 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5361 /* It really is worthwhile to have the section, so we'll just
5362 have to look harder. This case can be executed if we have
5363 line numbers but no functions (as can happen in assembly
5366 struct minimal_symbol
*msym
;
5368 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5370 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5377 break_command (char *arg
, int from_tty
)
5379 break_command_1 (arg
, 0, from_tty
);
5383 break_at_finish_command (char *arg
, int from_tty
)
5385 break_at_finish_command_1 (arg
, 0, from_tty
);
5389 break_at_finish_at_depth_command (char *arg
, int from_tty
)
5391 break_at_finish_at_depth_command_1 (arg
, 0, from_tty
);
5395 tbreak_command (char *arg
, int from_tty
)
5397 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5401 tbreak_at_finish_command (char *arg
, int from_tty
)
5403 break_at_finish_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5407 hbreak_command (char *arg
, int from_tty
)
5409 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5413 thbreak_command (char *arg
, int from_tty
)
5415 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5419 stop_command (char *arg
, int from_tty
)
5421 printf_filtered ("Specify the type of breakpoint to set.\n\
5422 Usage: stop in <function | address>\n\
5427 stopin_command (char *arg
, int from_tty
)
5431 if (arg
== (char *) NULL
)
5433 else if (*arg
!= '*')
5438 /* look for a ':'. If this is a line number specification, then
5439 say it is bad, otherwise, it should be an address or
5440 function/method name */
5441 while (*argptr
&& !hasColon
)
5443 hasColon
= (*argptr
== ':');
5448 badInput
= (*argptr
!= ':'); /* Not a class::method */
5450 badInput
= isdigit (*arg
); /* a simple line number */
5454 printf_filtered ("Usage: stop in <function | address>\n");
5456 break_command_1 (arg
, 0, from_tty
);
5460 stopat_command (char *arg
, int from_tty
)
5464 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5471 /* look for a ':'. If there is a '::' then get out, otherwise
5472 it is probably a line number. */
5473 while (*argptr
&& !hasColon
)
5475 hasColon
= (*argptr
== ':');
5480 badInput
= (*argptr
== ':'); /* we have class::method */
5482 badInput
= !isdigit (*arg
); /* not a line number */
5486 printf_filtered ("Usage: stop at <line>\n");
5488 break_command_1 (arg
, 0, from_tty
);
5491 /* accessflag: hw_write: watch write,
5492 hw_read: watch read,
5493 hw_access: watch access (read or write) */
5495 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5497 struct breakpoint
*b
;
5498 struct symtab_and_line sal
;
5499 struct expression
*exp
;
5500 struct block
*exp_valid_block
;
5501 struct value
*val
, *mark
;
5502 struct frame_info
*frame
;
5503 struct frame_info
*prev_frame
= NULL
;
5504 char *exp_start
= NULL
;
5505 char *exp_end
= NULL
;
5506 char *tok
, *end_tok
;
5508 char *cond_start
= NULL
;
5509 char *cond_end
= NULL
;
5510 struct expression
*cond
= NULL
;
5511 int i
, other_type_used
, target_resources_ok
= 0;
5512 enum bptype bp_type
;
5515 init_sal (&sal
); /* initialize to zeroes */
5517 /* Parse arguments. */
5518 innermost_block
= NULL
;
5520 exp
= parse_exp_1 (&arg
, 0, 0);
5522 exp_valid_block
= innermost_block
;
5523 mark
= value_mark ();
5524 val
= evaluate_expression (exp
);
5525 release_value (val
);
5526 if (VALUE_LAZY (val
))
5527 value_fetch_lazy (val
);
5530 while (*tok
== ' ' || *tok
== '\t')
5534 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5537 toklen
= end_tok
- tok
;
5538 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5540 tok
= cond_start
= end_tok
+ 1;
5541 cond
= parse_exp_1 (&tok
, 0, 0);
5545 error ("Junk at end of command.");
5547 if (accessflag
== hw_read
)
5548 bp_type
= bp_read_watchpoint
;
5549 else if (accessflag
== hw_access
)
5550 bp_type
= bp_access_watchpoint
;
5552 bp_type
= bp_hardware_watchpoint
;
5554 mem_cnt
= can_use_hardware_watchpoint (val
);
5555 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5556 error ("Expression cannot be implemented with read/access watchpoint.");
5559 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5560 target_resources_ok
=
5561 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5563 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5564 error ("Target does not support this type of hardware watchpoint.");
5566 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5567 error ("Target can only support one kind of HW watchpoint at a time.");
5570 #if defined(HPUXHPPA)
5571 /* On HP-UX if you set a h/w
5572 watchpoint before the "run" command, the inferior dies with a e.g.,
5573 SIGILL once you start it. I initially believed this was due to a
5574 bad interaction between page protection traps and the initial
5575 startup sequence by the dynamic linker.
5577 However, I tried avoiding that by having HP-UX's implementation of
5578 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5579 yet, which forced slow watches before a "run" or "attach", and it
5580 still fails somewhere in the startup code.
5582 Until I figure out what's happening, I'm disallowing watches altogether
5583 before the "run" or "attach" command. We'll tell the user they must
5584 set watches after getting the program started. */
5585 if (!target_has_execution
)
5587 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5590 #endif /* HPUXHPPA */
5592 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5593 watchpoint could not be set. */
5594 if (!mem_cnt
|| target_resources_ok
<= 0)
5595 bp_type
= bp_watchpoint
;
5597 /* Now set up the breakpoint. */
5598 b
= set_raw_breakpoint (sal
, bp_type
);
5599 set_breakpoint_count (breakpoint_count
+ 1);
5600 b
->number
= breakpoint_count
;
5601 b
->disposition
= disp_donttouch
;
5603 b
->exp_valid_block
= exp_valid_block
;
5604 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5608 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5612 frame
= block_innermost_frame (exp_valid_block
);
5615 prev_frame
= get_prev_frame (frame
);
5616 b
->watchpoint_frame
= get_frame_id (frame
);
5620 memset (&b
->watchpoint_frame
, 0, sizeof (b
->watchpoint_frame
));
5623 /* If the expression is "local", then set up a "watchpoint scope"
5624 breakpoint at the point where we've left the scope of the watchpoint
5626 if (innermost_block
)
5630 struct breakpoint
*scope_breakpoint
;
5631 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5632 bp_watchpoint_scope
);
5634 scope_breakpoint
->enable_state
= bp_enabled
;
5636 /* Automatically delete the breakpoint when it hits. */
5637 scope_breakpoint
->disposition
= disp_del
;
5639 /* Only break in the proper frame (help with recursion). */
5640 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5642 /* Set the address at which we will stop. */
5643 scope_breakpoint
->loc
->requested_address
5644 = get_frame_pc (prev_frame
);
5645 scope_breakpoint
->loc
->address
5646 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
);
5648 /* The scope breakpoint is related to the watchpoint. We
5649 will need to act on them together. */
5650 b
->related_breakpoint
= scope_breakpoint
;
5653 value_free_to_mark (mark
);
5657 /* Return count of locations need to be watched and can be handled
5658 in hardware. If the watchpoint can not be handled
5659 in hardware return zero. */
5661 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
5662 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
5663 ((BYTE_SIZE) <= (DEPRECATED_REGISTER_SIZE))
5666 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5667 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5668 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5672 can_use_hardware_watchpoint (struct value
*v
)
5674 int found_memory_cnt
= 0;
5675 struct value
*head
= v
;
5677 /* Did the user specifically forbid us to use hardware watchpoints? */
5678 if (!can_use_hw_watchpoints
)
5681 /* Make sure that the value of the expression depends only upon
5682 memory contents, and values computed from them within GDB. If we
5683 find any register references or function calls, we can't use a
5684 hardware watchpoint.
5686 The idea here is that evaluating an expression generates a series
5687 of values, one holding the value of every subexpression. (The
5688 expression a*b+c has five subexpressions: a, b, a*b, c, and
5689 a*b+c.) GDB's values hold almost enough information to establish
5690 the criteria given above --- they identify memory lvalues,
5691 register lvalues, computed values, etcetera. So we can evaluate
5692 the expression, and then scan the chain of values that leaves
5693 behind to decide whether we can detect any possible change to the
5694 expression's final value using only hardware watchpoints.
5696 However, I don't think that the values returned by inferior
5697 function calls are special in any way. So this function may not
5698 notice that an expression involving an inferior function call
5699 can't be watched with hardware watchpoints. FIXME. */
5700 for (; v
; v
= v
->next
)
5702 if (VALUE_LVAL (v
) == lval_memory
)
5705 /* A lazy memory lvalue is one that GDB never needed to fetch;
5706 we either just used its address (e.g., `a' in `a.b') or
5707 we never needed it at all (e.g., `a' in `a,b'). */
5711 /* Ahh, memory we actually used! Check if we can cover
5712 it with hardware watchpoints. */
5713 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
5715 /* We only watch structs and arrays if user asked for it
5716 explicitly, never if they just happen to appear in a
5717 middle of some value chain. */
5719 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
5720 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
5722 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
5723 int len
= TYPE_LENGTH (VALUE_TYPE (v
));
5725 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
5732 else if (v
->lval
!= not_lval
&& v
->modifiable
== 0)
5733 return 0; /* ??? What does this represent? */
5734 else if (v
->lval
== lval_register
)
5735 return 0; /* cannot watch a register with a HW watchpoint */
5738 /* The expression itself looks suitable for using a hardware
5739 watchpoint, but give the target machine a chance to reject it. */
5740 return found_memory_cnt
;
5744 watch_command_wrapper (char *arg
, int from_tty
)
5746 watch_command (arg
, from_tty
);
5750 watch_command (char *arg
, int from_tty
)
5752 watch_command_1 (arg
, hw_write
, from_tty
);
5756 rwatch_command_wrapper (char *arg
, int from_tty
)
5758 rwatch_command (arg
, from_tty
);
5762 rwatch_command (char *arg
, int from_tty
)
5764 watch_command_1 (arg
, hw_read
, from_tty
);
5768 awatch_command_wrapper (char *arg
, int from_tty
)
5770 awatch_command (arg
, from_tty
);
5774 awatch_command (char *arg
, int from_tty
)
5776 watch_command_1 (arg
, hw_access
, from_tty
);
5780 /* Helper routines for the until_command routine in infcmd.c. Here
5781 because it uses the mechanisms of breakpoints. */
5783 /* This function is called by fetch_inferior_event via the
5784 cmd_continuation pointer, to complete the until command. It takes
5785 care of cleaning up the temporary breakpoints set up by the until
5788 until_break_command_continuation (struct continuation_arg
*arg
)
5790 struct cleanup
*cleanups
;
5792 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
5793 do_exec_cleanups (cleanups
);
5797 until_break_command (char *arg
, int from_tty
, int anywhere
)
5799 struct symtabs_and_lines sals
;
5800 struct symtab_and_line sal
;
5801 struct frame_info
*prev_frame
= get_prev_frame (deprecated_selected_frame
);
5802 struct breakpoint
*breakpoint
;
5803 struct cleanup
*old_chain
;
5804 struct continuation_arg
*arg1
;
5807 clear_proceed_status ();
5809 /* Set a breakpoint where the user wants it and at return from
5812 if (default_breakpoint_valid
)
5813 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
5814 default_breakpoint_line
, (char ***) NULL
, NULL
);
5816 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
5817 0, (char ***) NULL
, NULL
);
5819 if (sals
.nelts
!= 1)
5820 error ("Couldn't get information on specified line.");
5823 xfree (sals
.sals
); /* malloc'd, so freed */
5826 error ("Junk at end of arguments.");
5828 resolve_sal_pc (&sal
);
5831 /* If the user told us to continue until a specified location,
5832 we don't specify a frame at which we need to stop. */
5833 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
5835 /* Otherwise, specify the current frame, because we want to stop only
5836 at the very same frame. */
5837 breakpoint
= set_momentary_breakpoint (sal
,
5838 get_frame_id (deprecated_selected_frame
),
5841 if (!event_loop_p
|| !target_can_async_p ())
5842 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
5844 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
5846 /* If we are running asynchronously, and the target supports async
5847 execution, we are not waiting for the target to stop, in the call
5848 tp proceed, below. This means that we cannot delete the
5849 brekpoints until the target has actually stopped. The only place
5850 where we get a chance to do that is in fetch_inferior_event, so
5851 we must set things up for that. */
5853 if (event_loop_p
&& target_can_async_p ())
5855 /* In this case the arg for the continuation is just the point
5856 in the exec_cleanups chain from where to start doing
5857 cleanups, because all the continuation does is the cleanups in
5858 the exec_cleanup_chain. */
5860 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
5862 arg1
->data
.pointer
= old_chain
;
5864 add_continuation (until_break_command_continuation
, arg1
);
5867 /* Keep within the current frame, or in frames called by the current
5871 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
5872 sal
.pc
= get_frame_pc (prev_frame
);
5873 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
5875 if (!event_loop_p
|| !target_can_async_p ())
5876 make_cleanup_delete_breakpoint (breakpoint
);
5878 make_exec_cleanup_delete_breakpoint (breakpoint
);
5881 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
5882 /* Do the cleanups now, anly if we are not running asynchronously,
5883 of if we are, but the target is still synchronous. */
5884 if (!event_loop_p
|| !target_can_async_p ())
5885 do_cleanups (old_chain
);
5889 ep_skip_leading_whitespace (char **s
)
5891 if ((s
== NULL
) || (*s
== NULL
))
5893 while (isspace (**s
))
5897 /* This function examines a string, and attempts to find a token
5898 that might be an event name in the leading characters. If a
5899 possible match is found, a pointer to the last character of
5900 the token is returned. Else, NULL is returned. */
5903 ep_find_event_name_end (char *arg
)
5906 char *event_name_end
= NULL
;
5908 /* If we could depend upon the presense of strrpbrk, we'd use that... */
5912 /* We break out of the loop when we find a token delimiter.
5913 Basically, we're looking for alphanumerics and underscores;
5914 anything else delimites the token. */
5917 if (!isalnum (*s
) && (*s
!= '_'))
5923 return event_name_end
;
5927 /* This function attempts to parse an optional "if <cond>" clause
5928 from the arg string. If one is not found, it returns NULL.
5930 Else, it returns a pointer to the condition string. (It does not
5931 attempt to evaluate the string against a particular block.) And,
5932 it updates arg to point to the first character following the parsed
5933 if clause in the arg string. */
5936 ep_parse_optional_if_clause (char **arg
)
5940 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
5943 /* Skip the "if" keyword. */
5946 /* Skip any extra leading whitespace, and record the start of the
5947 condition string. */
5948 ep_skip_leading_whitespace (arg
);
5951 /* Assume that the condition occupies the remainder of the arg string. */
5952 (*arg
) += strlen (cond_string
);
5957 /* This function attempts to parse an optional filename from the arg
5958 string. If one is not found, it returns NULL.
5960 Else, it returns a pointer to the parsed filename. (This function
5961 makes no attempt to verify that a file of that name exists, or is
5962 accessible.) And, it updates arg to point to the first character
5963 following the parsed filename in the arg string.
5965 Note that clients needing to preserve the returned filename for
5966 future access should copy it to their own buffers. */
5968 ep_parse_optional_filename (char **arg
)
5970 static char filename
[1024];
5975 if ((*arg_p
== '\0') || isspace (*arg_p
))
5993 /* Commands to deal with catching events, such as signals, exceptions,
5994 process start/exit, etc. */
5998 catch_fork
, catch_vfork
6003 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
6006 char *cond_string
= NULL
;
6008 ep_skip_leading_whitespace (&arg
);
6010 /* The allowed syntax is:
6012 catch [v]fork if <cond>
6014 First, check if there's an if clause. */
6015 cond_string
= ep_parse_optional_if_clause (&arg
);
6017 if ((*arg
!= '\0') && !isspace (*arg
))
6018 error ("Junk at end of arguments.");
6020 /* If this target supports it, create a fork or vfork catchpoint
6021 and enable reporting of such events. */
6025 create_fork_event_catchpoint (tempflag
, cond_string
);
6028 create_vfork_event_catchpoint (tempflag
, cond_string
);
6031 error ("unsupported or unknown fork kind; cannot catch it");
6037 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6039 char *cond_string
= NULL
;
6041 ep_skip_leading_whitespace (&arg
);
6043 /* The allowed syntax is:
6045 catch exec if <cond>
6047 First, check if there's an if clause. */
6048 cond_string
= ep_parse_optional_if_clause (&arg
);
6050 if ((*arg
!= '\0') && !isspace (*arg
))
6051 error ("Junk at end of arguments.");
6053 /* If this target supports it, create an exec catchpoint
6054 and enable reporting of such events. */
6055 create_exec_event_catchpoint (tempflag
, cond_string
);
6059 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6061 char *dll_pathname
= NULL
;
6062 char *cond_string
= NULL
;
6064 ep_skip_leading_whitespace (&arg
);
6066 /* The allowed syntax is:
6068 catch load if <cond>
6069 catch load <filename>
6070 catch load <filename> if <cond>
6072 The user is not allowed to specify the <filename> after an
6075 We'll ignore the pathological case of a file named "if".
6077 First, check if there's an if clause. If so, then there
6078 cannot be a filename. */
6079 cond_string
= ep_parse_optional_if_clause (&arg
);
6081 /* If there was an if clause, then there cannot be a filename.
6082 Else, there might be a filename and an if clause. */
6083 if (cond_string
== NULL
)
6085 dll_pathname
= ep_parse_optional_filename (&arg
);
6086 ep_skip_leading_whitespace (&arg
);
6087 cond_string
= ep_parse_optional_if_clause (&arg
);
6090 if ((*arg
!= '\0') && !isspace (*arg
))
6091 error ("Junk at end of arguments.");
6093 /* Create a load breakpoint that only triggers when a load of
6094 the specified dll (or any dll, if no pathname was specified)
6096 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6097 dll_pathname
, cond_string
);
6101 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6103 char *dll_pathname
= NULL
;
6104 char *cond_string
= NULL
;
6106 ep_skip_leading_whitespace (&arg
);
6108 /* The allowed syntax is:
6110 catch unload if <cond>
6111 catch unload <filename>
6112 catch unload <filename> if <cond>
6114 The user is not allowed to specify the <filename> after an
6117 We'll ignore the pathological case of a file named "if".
6119 First, check if there's an if clause. If so, then there
6120 cannot be a filename. */
6121 cond_string
= ep_parse_optional_if_clause (&arg
);
6123 /* If there was an if clause, then there cannot be a filename.
6124 Else, there might be a filename and an if clause. */
6125 if (cond_string
== NULL
)
6127 dll_pathname
= ep_parse_optional_filename (&arg
);
6128 ep_skip_leading_whitespace (&arg
);
6129 cond_string
= ep_parse_optional_if_clause (&arg
);
6132 if ((*arg
!= '\0') && !isspace (*arg
))
6133 error ("Junk at end of arguments.");
6135 /* Create an unload breakpoint that only triggers when an unload of
6136 the specified dll (or any dll, if no pathname was specified)
6138 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6139 dll_pathname
, cond_string
);
6142 /* Commands to deal with catching exceptions. */
6144 /* Set a breakpoint at the specified callback routine for an
6145 exception event callback */
6148 create_exception_catchpoint (int tempflag
, char *cond_string
,
6149 enum exception_event_kind ex_event
,
6150 struct symtab_and_line
*sal
)
6152 struct breakpoint
*b
;
6153 int thread
= -1; /* All threads. */
6156 if (!sal
) /* no exception support? */
6161 case EX_EVENT_THROW
:
6162 bptype
= bp_catch_throw
;
6164 case EX_EVENT_CATCH
:
6165 bptype
= bp_catch_catch
;
6167 default: /* error condition */
6168 error ("Internal error -- invalid catchpoint kind");
6171 b
= set_raw_breakpoint (*sal
, bptype
);
6172 set_breakpoint_count (breakpoint_count
+ 1);
6173 b
->number
= breakpoint_count
;
6175 b
->cond_string
= (cond_string
== NULL
) ?
6176 NULL
: savestring (cond_string
, strlen (cond_string
));
6178 b
->addr_string
= NULL
;
6179 b
->enable_state
= bp_enabled
;
6180 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6184 static enum print_stop_action
6185 print_exception_catchpoint (struct breakpoint
*b
)
6187 annotate_catchpoint (b
->number
);
6189 if (strstr (b
->addr_string
, "throw") != NULL
)
6190 printf_filtered ("\nCatchpoint %d (exception thrown)\n",
6193 printf_filtered ("\nCatchpoint %d (exception caught)\n",
6196 return PRINT_SRC_AND_LOC
;
6200 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6205 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6208 *last_addr
= b
->loc
->address
;
6209 if (strstr (b
->addr_string
, "throw") != NULL
)
6210 ui_out_field_string (uiout
, "what", "exception throw");
6212 ui_out_field_string (uiout
, "what", "exception catch");
6216 print_mention_exception_catchpoint (struct breakpoint
*b
)
6218 if (strstr (b
->addr_string
, "throw") != NULL
)
6219 printf_filtered ("Catchpoint %d (throw)", b
->number
);
6221 printf_filtered ("Catchpoint %d (catch)", b
->number
);
6224 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6225 print_exception_catchpoint
,
6226 print_one_exception_catchpoint
,
6227 print_mention_exception_catchpoint
6231 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6232 enum exception_event_kind ex_event
, int from_tty
)
6234 char *trigger_func_name
, *nameptr
;
6235 struct symtabs_and_lines sals
;
6236 struct breakpoint
*b
;
6238 if (ex_event
== EX_EVENT_CATCH
)
6239 trigger_func_name
= xstrdup ("__cxa_begin_catch");
6241 trigger_func_name
= xstrdup ("__cxa_throw");
6243 nameptr
= trigger_func_name
;
6244 sals
= decode_line_1 (&nameptr
, 1, NULL
, 0, NULL
, NULL
);
6245 if (sals
.nelts
== 0)
6247 xfree (trigger_func_name
);
6251 b
= set_raw_breakpoint (sals
.sals
[0], bp_breakpoint
);
6252 set_breakpoint_count (breakpoint_count
+ 1);
6253 b
->number
= breakpoint_count
;
6255 b
->cond_string
= (cond_string
== NULL
) ?
6256 NULL
: savestring (cond_string
, strlen (cond_string
));
6258 b
->addr_string
= trigger_func_name
;
6259 b
->enable_state
= bp_enabled
;
6260 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6261 b
->ops
= &gnu_v3_exception_catchpoint_ops
;
6268 /* Deal with "catch catch" and "catch throw" commands */
6271 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6272 int tempflag
, int from_tty
)
6274 char *cond_string
= NULL
;
6275 struct symtab_and_line
*sal
= NULL
;
6277 ep_skip_leading_whitespace (&arg
);
6279 cond_string
= ep_parse_optional_if_clause (&arg
);
6281 if ((*arg
!= '\0') && !isspace (*arg
))
6282 error ("Junk at end of arguments.");
6284 if ((ex_event
!= EX_EVENT_THROW
) &&
6285 (ex_event
!= EX_EVENT_CATCH
))
6286 error ("Unsupported or unknown exception event; cannot catch it");
6288 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6291 /* See if we can find a callback routine */
6292 sal
= target_enable_exception_callback (ex_event
, 1);
6296 /* We have callbacks from the runtime system for exceptions.
6297 Set a breakpoint on the sal found, if no errors */
6298 if (sal
!= (struct symtab_and_line
*) -1)
6299 create_exception_catchpoint (tempflag
, cond_string
, ex_event
, sal
);
6301 return; /* something went wrong with setting up callbacks */
6304 warning ("Unsupported with this platform/compiler combination.");
6307 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6308 inside a catch_errors */
6311 cover_target_enable_exception_callback (void *arg
)
6313 args_for_catchpoint_enable
*args
= arg
;
6314 struct symtab_and_line
*sal
;
6315 sal
= target_enable_exception_callback (args
->kind
, args
->enable_p
);
6318 else if (sal
== (struct symtab_and_line
*) -1)
6321 return 1; /*is valid */
6325 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6328 /* The first argument may be an event name, such as "start" or "load".
6329 If so, then handle it as such. If it doesn't match an event name,
6330 then attempt to interpret it as an exception name. (This latter is
6331 the v4.16-and-earlier GDB meaning of the "catch" command.)
6333 First, try to find the bounds of what might be an event name. */
6334 char *arg1_start
= arg
;
6338 if (arg1_start
== NULL
)
6340 /* Old behaviour was to use pre-v-4.16 syntax */
6341 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6343 /* Now, this is not allowed */
6344 error ("Catch requires an event name.");
6347 arg1_end
= ep_find_event_name_end (arg1_start
);
6348 if (arg1_end
== NULL
)
6349 error ("catch requires an event");
6350 arg1_length
= arg1_end
+ 1 - arg1_start
;
6352 /* Try to match what we found against known event names. */
6353 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6355 error ("Catch of signal not yet implemented");
6357 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6359 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6360 tempflag
, from_tty
);
6362 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6364 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6365 tempflag
, from_tty
);
6367 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6369 error ("Catch of thread_start not yet implemented");
6371 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6373 error ("Catch of thread_exit not yet implemented");
6375 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6377 error ("Catch of thread_join not yet implemented");
6379 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6381 error ("Catch of start not yet implemented");
6383 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6385 error ("Catch of exit not yet implemented");
6387 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6389 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6391 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6393 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6395 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6397 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6399 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6401 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6403 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6405 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6407 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6409 error ("Catch of stop not yet implemented");
6412 /* This doesn't appear to be an event name */
6416 /* Pre-v.4.16 behaviour was to treat the argument
6417 as the name of an exception */
6418 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6419 /* Now this is not allowed */
6420 error ("Unknown event kind specified for catch");
6425 /* Used by the gui, could be made a worker for other things. */
6428 set_breakpoint_sal (struct symtab_and_line sal
)
6430 struct breakpoint
*b
;
6431 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6432 set_breakpoint_count (breakpoint_count
+ 1);
6433 b
->number
= breakpoint_count
;
6440 catch_command (char *arg
, int from_tty
)
6442 catch_command_1 (arg
, 0, from_tty
);
6447 tcatch_command (char *arg
, int from_tty
)
6449 catch_command_1 (arg
, 1, from_tty
);
6452 /* Delete breakpoints by address or line. */
6455 clear_command (char *arg
, int from_tty
)
6457 struct breakpoint
*b
, *tmp
, *prev
, *found
;
6459 struct symtabs_and_lines sals
;
6460 struct symtab_and_line sal
;
6465 sals
= decode_line_spec (arg
, 1);
6470 sals
.sals
= (struct symtab_and_line
*)
6471 xmalloc (sizeof (struct symtab_and_line
));
6472 make_cleanup (xfree
, sals
.sals
);
6473 init_sal (&sal
); /* initialize to zeroes */
6474 sal
.line
= default_breakpoint_line
;
6475 sal
.symtab
= default_breakpoint_symtab
;
6476 sal
.pc
= default_breakpoint_address
;
6477 if (sal
.symtab
== 0)
6478 error ("No source file specified.");
6486 /* For each line spec given, delete bps which correspond
6487 to it. Do it in two passes, solely to preserve the current
6488 behavior that from_tty is forced true if we delete more than
6492 for (i
= 0; i
< sals
.nelts
; i
++)
6494 /* If exact pc given, clear bpts at that pc.
6495 If line given (pc == 0), clear all bpts on specified line.
6496 If defaulting, clear all bpts on default line
6499 defaulting sal.pc != 0 tests to do
6504 1 0 <can't happen> */
6509 /* Find all matching breakpoints, remove them from the
6510 breakpoint chain, and add them to the 'found' chain. */
6511 ALL_BREAKPOINTS_SAFE (b
, tmp
)
6513 /* Are we going to delete b? */
6514 if (b
->type
!= bp_none
6515 && b
->type
!= bp_watchpoint
6516 && b
->type
!= bp_hardware_watchpoint
6517 && b
->type
!= bp_read_watchpoint
6518 && b
->type
!= bp_access_watchpoint
6519 /* Not if b is a watchpoint of any sort... */
6520 && (((sal
.pc
&& (b
->loc
->address
== sal
.pc
))
6521 && (!section_is_overlay (b
->loc
->section
)
6522 || b
->loc
->section
== sal
.section
))
6523 /* Yes, if sal.pc matches b (modulo overlays). */
6524 || ((default_match
|| (0 == sal
.pc
))
6525 && b
->source_file
!= NULL
6526 && sal
.symtab
!= NULL
6527 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6528 && b
->line_number
== sal
.line
)))
6529 /* Yes, if sal source file and line matches b. */
6531 /* Remove it from breakpoint_chain... */
6532 if (b
== breakpoint_chain
)
6534 /* b is at the head of the list */
6535 breakpoint_chain
= b
->next
;
6539 prev
->next
= b
->next
;
6541 /* And add it to 'found' chain. */
6547 /* Keep b, and keep a pointer to it. */
6552 /* Now go thru the 'found' chain and delete them. */
6556 error ("No breakpoint at %s.", arg
);
6558 error ("No breakpoint at this line.");
6562 from_tty
= 1; /* Always report if deleted more than one */
6564 printf_unfiltered ("Deleted breakpoint%s ", found
->next
? "s" : "");
6565 breakpoints_changed ();
6569 printf_unfiltered ("%d ", found
->number
);
6571 delete_breakpoint (found
);
6575 putchar_unfiltered ('\n');
6578 /* Delete breakpoint in BS if they are `delete' breakpoints and
6579 all breakpoints that are marked for deletion, whether hit or not.
6580 This is called after any breakpoint is hit, or after errors. */
6583 breakpoint_auto_delete (bpstat bs
)
6585 struct breakpoint
*b
, *temp
;
6587 for (; bs
; bs
= bs
->next
)
6588 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== disp_del
6590 delete_breakpoint (bs
->breakpoint_at
);
6592 ALL_BREAKPOINTS_SAFE (b
, temp
)
6594 if (b
->disposition
== disp_del_at_next_stop
)
6595 delete_breakpoint (b
);
6599 /* Delete a breakpoint and clean up all traces of it in the data
6603 delete_breakpoint (struct breakpoint
*bpt
)
6605 struct breakpoint
*b
;
6607 struct bp_location
*loc
;
6610 error ("Internal error (attempted to delete a NULL breakpoint)");
6613 /* Has this bp already been deleted? This can happen because multiple
6614 lists can hold pointers to bp's. bpstat lists are especial culprits.
6616 One example of this happening is a watchpoint's scope bp. When the
6617 scope bp triggers, we notice that the watchpoint is out of scope, and
6618 delete it. We also delete its scope bp. But the scope bp is marked
6619 "auto-deleting", and is already on a bpstat. That bpstat is then
6620 checked for auto-deleting bp's, which are deleted.
6622 A real solution to this problem might involve reference counts in bp's,
6623 and/or giving them pointers back to their referencing bpstat's, and
6624 teaching delete_breakpoint to only free a bp's storage when no more
6625 references were extent. A cheaper bandaid was chosen. */
6626 if (bpt
->type
== bp_none
)
6629 if (delete_breakpoint_hook
)
6630 delete_breakpoint_hook (bpt
);
6631 breakpoint_delete_event (bpt
->number
);
6633 if (bpt
->loc
->inserted
)
6634 remove_breakpoint (bpt
->loc
, mark_inserted
);
6636 if (breakpoint_chain
== bpt
)
6637 breakpoint_chain
= bpt
->next
;
6639 if (bp_location_chain
== bpt
->loc
)
6640 bp_location_chain
= bpt
->loc
->next
;
6642 /* If we have callback-style exception catchpoints, don't go through
6643 the adjustments to the C++ runtime library etc. if the inferior
6644 isn't actually running. target_enable_exception_callback for a
6645 null target ops vector gives an undesirable error message, so we
6646 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6647 exceptions are supported in this way, it's OK for now. FIXME */
6648 if (ep_is_exception_catchpoint (bpt
) && target_has_execution
)
6650 /* Format possible error msg */
6651 char *message
= xstrprintf ("Error in deleting catchpoint %d:\n",
6653 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
6654 args_for_catchpoint_enable args
;
6655 args
.kind
= bpt
->type
== bp_catch_catch
?
6656 EX_EVENT_CATCH
: EX_EVENT_THROW
;
6658 catch_errors (cover_target_enable_exception_callback
, &args
,
6659 message
, RETURN_MASK_ALL
);
6660 do_cleanups (cleanups
);
6667 b
->next
= bpt
->next
;
6671 ALL_BP_LOCATIONS (loc
)
6672 if (loc
->next
== bpt
->loc
)
6674 loc
->next
= bpt
->loc
->next
;
6678 check_duplicates (bpt
);
6679 /* If this breakpoint was inserted, and there is another breakpoint
6680 at the same address, we need to insert the other breakpoint. */
6681 if (bpt
->loc
->inserted
6682 && bpt
->type
!= bp_hardware_watchpoint
6683 && bpt
->type
!= bp_read_watchpoint
6684 && bpt
->type
!= bp_access_watchpoint
6685 && bpt
->type
!= bp_catch_fork
6686 && bpt
->type
!= bp_catch_vfork
6687 && bpt
->type
!= bp_catch_exec
)
6690 if (b
->loc
->address
== bpt
->loc
->address
6691 && b
->loc
->section
== bpt
->loc
->section
6692 && !b
->loc
->duplicate
6693 && b
->enable_state
!= bp_disabled
6694 && b
->enable_state
!= bp_shlib_disabled
6695 && b
->enable_state
!= bp_call_disabled
)
6699 /* We should never reach this point if there is a permanent
6700 breakpoint at the same address as the one being deleted.
6701 If there is a permanent breakpoint somewhere, it should
6702 always be the only one inserted. */
6703 if (b
->enable_state
== bp_permanent
)
6704 internal_error (__FILE__
, __LINE__
,
6705 "another breakpoint was inserted on top of "
6706 "a permanent breakpoint");
6708 if (b
->type
== bp_hardware_breakpoint
)
6709 val
= target_insert_hw_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
6711 val
= target_insert_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
6713 /* If there was an error in the insert, print a message, then stop execution. */
6716 struct ui_file
*tmp_error_stream
= mem_fileopen ();
6717 make_cleanup_ui_file_delete (tmp_error_stream
);
6720 if (b
->type
== bp_hardware_breakpoint
)
6722 fprintf_unfiltered (tmp_error_stream
,
6723 "Cannot insert hardware breakpoint %d.\n"
6724 "You may have requested too many hardware breakpoints.\n",
6729 fprintf_unfiltered (tmp_error_stream
, "Cannot insert breakpoint %d.\n", b
->number
);
6730 fprintf_filtered (tmp_error_stream
, "Error accessing memory address ");
6731 print_address_numeric (b
->loc
->address
, 1, tmp_error_stream
);
6732 fprintf_filtered (tmp_error_stream
, ": %s.\n",
6733 safe_strerror (val
));
6736 fprintf_unfiltered (tmp_error_stream
,"The same program may be running in another process.");
6737 target_terminal_ours_for_output ();
6738 error_stream(tmp_error_stream
);
6741 b
->loc
->inserted
= 1;
6745 free_command_lines (&bpt
->commands
);
6748 if (bpt
->cond_string
!= NULL
)
6749 xfree (bpt
->cond_string
);
6750 if (bpt
->addr_string
!= NULL
)
6751 xfree (bpt
->addr_string
);
6752 if (bpt
->exp
!= NULL
)
6754 if (bpt
->exp_string
!= NULL
)
6755 xfree (bpt
->exp_string
);
6756 if (bpt
->val
!= NULL
)
6757 value_free (bpt
->val
);
6758 if (bpt
->source_file
!= NULL
)
6759 xfree (bpt
->source_file
);
6760 if (bpt
->dll_pathname
!= NULL
)
6761 xfree (bpt
->dll_pathname
);
6762 if (bpt
->triggered_dll_pathname
!= NULL
)
6763 xfree (bpt
->triggered_dll_pathname
);
6764 if (bpt
->exec_pathname
!= NULL
)
6765 xfree (bpt
->exec_pathname
);
6767 /* Be sure no bpstat's are pointing at it after it's been freed. */
6768 /* FIXME, how can we find all bpstat's?
6769 We just check stop_bpstat for now. */
6770 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
6771 if (bs
->breakpoint_at
== bpt
)
6773 bs
->breakpoint_at
= NULL
;
6775 /* bs->commands will be freed later. */
6777 /* On the chance that someone will soon try again to delete this same
6778 bp, we mark it as deleted before freeing its storage. */
6779 bpt
->type
= bp_none
;
6786 do_delete_breakpoint_cleanup (void *b
)
6788 delete_breakpoint (b
);
6792 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
6794 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
6798 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
6800 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
6804 delete_command (char *arg
, int from_tty
)
6806 struct breakpoint
*b
, *temp
;
6812 int breaks_to_delete
= 0;
6814 /* Delete all breakpoints if no argument.
6815 Do not delete internal or call-dummy breakpoints, these
6816 have to be deleted with an explicit breakpoint number argument. */
6819 if (b
->type
!= bp_call_dummy
&&
6820 b
->type
!= bp_shlib_event
&&
6821 b
->type
!= bp_thread_event
&&
6822 b
->type
!= bp_overlay_event
&&
6824 breaks_to_delete
= 1;
6827 /* Ask user only if there are some breakpoints to delete. */
6829 || (breaks_to_delete
&& query ("Delete all breakpoints? ")))
6831 ALL_BREAKPOINTS_SAFE (b
, temp
)
6833 if (b
->type
!= bp_call_dummy
&&
6834 b
->type
!= bp_shlib_event
&&
6835 b
->type
!= bp_thread_event
&&
6836 b
->type
!= bp_overlay_event
&&
6838 delete_breakpoint (b
);
6843 map_breakpoint_numbers (arg
, delete_breakpoint
);
6846 /* Reset a breakpoint given it's struct breakpoint * BINT.
6847 The value we return ends up being the return value from catch_errors.
6848 Unused in this case. */
6851 breakpoint_re_set_one (void *bint
)
6853 /* get past catch_errs */
6854 struct breakpoint
*b
= (struct breakpoint
*) bint
;
6857 struct symtabs_and_lines sals
;
6859 enum enable_state save_enable
;
6864 warning ("attempted to reset apparently deleted breakpoint #%d?",
6868 case bp_hardware_breakpoint
:
6870 case bp_catch_unload
:
6871 if (b
->addr_string
== NULL
)
6873 /* Anything without a string can't be re-set. */
6874 delete_breakpoint (b
);
6877 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
6879 ``And a hack it is, although Apple's Darwin version of GDB
6880 contains an almost identical hack to implement a "future
6881 break" command. It seems to work in many real world cases,
6882 but it is easy to come up with a test case where the patch
6883 doesn't help at all.''
6885 ``It seems that the way GDB implements breakpoints - in -
6886 shared - libraries was designed for a.out shared library
6887 systems (SunOS 4) where shared libraries were loaded at a
6888 fixed address in memory. Since ELF shared libraries can (and
6889 will) be loaded at any address in memory, things break.
6890 Fixing this is not trivial. Therefore, I'm not sure whether
6891 we should add this hack to the branch only. I cannot
6892 guarantee that things will be fixed on the trunk in the near
6895 In case we have a problem, disable this breakpoint. We'll
6896 restore its status if we succeed. Don't disable a
6897 shlib_disabled breakpoint though. There's a fair chance we
6898 can't re-set it if the shared library it's in hasn't been
6900 save_enable
= b
->enable_state
;
6901 if (b
->enable_state
!= bp_shlib_disabled
)
6902 b
->enable_state
= bp_disabled
;
6904 set_language (b
->language
);
6905 input_radix
= b
->input_radix
;
6907 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
6908 for (i
= 0; i
< sals
.nelts
; i
++)
6910 resolve_sal_pc (&sals
.sals
[i
]);
6912 /* Reparse conditions, they might contain references to the
6914 if (b
->cond_string
!= NULL
)
6920 /* Avoid re-freeing b->exp if an error during the call
6924 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
6927 /* We need to re-set the breakpoint if the address changes... */
6928 if (b
->loc
->address
!= sals
.sals
[i
].pc
6929 /* ...or new and old breakpoints both have source files, and
6930 the source file name or the line number changes... */
6931 || (b
->source_file
!= NULL
6932 && sals
.sals
[i
].symtab
!= NULL
6933 && (strcmp (b
->source_file
, sals
.sals
[i
].symtab
->filename
) != 0
6934 || b
->line_number
!= sals
.sals
[i
].line
)
6936 /* ...or we switch between having a source file and not having
6938 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
6941 if (b
->source_file
!= NULL
)
6942 xfree (b
->source_file
);
6943 if (sals
.sals
[i
].symtab
== NULL
)
6944 b
->source_file
= NULL
;
6947 savestring (sals
.sals
[i
].symtab
->filename
,
6948 strlen (sals
.sals
[i
].symtab
->filename
));
6949 b
->line_number
= sals
.sals
[i
].line
;
6950 b
->loc
->requested_address
= sals
.sals
[i
].pc
;
6952 = adjust_breakpoint_address (b
->loc
->requested_address
);
6954 /* Used to check for duplicates here, but that can
6955 cause trouble, as it doesn't check for disabled
6960 /* Might be better to do this just once per breakpoint_re_set,
6961 rather than once for every breakpoint. */
6962 breakpoints_changed ();
6964 b
->loc
->section
= sals
.sals
[i
].section
;
6965 b
->enable_state
= save_enable
; /* Restore it, this worked. */
6968 /* Now that this is re-enabled, check_duplicates
6970 check_duplicates (b
);
6977 case bp_hardware_watchpoint
:
6978 case bp_read_watchpoint
:
6979 case bp_access_watchpoint
:
6980 innermost_block
= NULL
;
6981 /* The issue arises of what context to evaluate this in. The
6982 same one as when it was set, but what does that mean when
6983 symbols have been re-read? We could save the filename and
6984 functionname, but if the context is more local than that, the
6985 best we could do would be something like how many levels deep
6986 and which index at that particular level, but that's going to
6987 be less stable than filenames or function names. */
6989 /* So for now, just use a global context. */
6993 /* Avoid re-freeing b->exp if an error during the call to
6994 parse_expression. */
6997 b
->exp
= parse_expression (b
->exp_string
);
6998 b
->exp_valid_block
= innermost_block
;
6999 mark
= value_mark ();
7002 value_free (b
->val
);
7003 /* Avoid re-freeing b->val if an error during the call to
7004 evaluate_expression. */
7007 b
->val
= evaluate_expression (b
->exp
);
7008 release_value (b
->val
);
7009 if (VALUE_LAZY (b
->val
) && breakpoint_enabled (b
))
7010 value_fetch_lazy (b
->val
);
7012 if (b
->cond_string
!= NULL
)
7018 /* Avoid re-freeing b->exp if an error during the call
7022 b
->cond
= parse_exp_1 (&s
, (struct block
*) 0, 0);
7024 if (breakpoint_enabled (b
))
7026 value_free_to_mark (mark
);
7028 case bp_catch_catch
:
7029 case bp_catch_throw
:
7031 /* We needn't really do anything to reset these, since the mask
7032 that requests them is unaffected by e.g., new libraries being
7035 case bp_catch_vfork
:
7040 printf_filtered ("Deleting unknown breakpoint type %d\n", b
->type
);
7042 /* Delete longjmp and overlay event breakpoints; they will be
7043 reset later by breakpoint_re_set. */
7045 case bp_longjmp_resume
:
7046 case bp_overlay_event
:
7047 delete_breakpoint (b
);
7050 /* This breakpoint is special, it's set up when the inferior
7051 starts and we really don't want to touch it. */
7052 case bp_shlib_event
:
7054 /* Like bp_shlib_event, this breakpoint type is special.
7055 Once it is set up, we do not want to touch it. */
7056 case bp_thread_event
:
7058 /* Keep temporary breakpoints, which can be encountered when we step
7059 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7060 Otherwise these should have been blown away via the cleanup chain
7061 or by breakpoint_init_inferior when we rerun the executable. */
7064 case bp_watchpoint_scope
:
7066 case bp_step_resume
:
7073 /* Re-set all breakpoints after symbols have been re-loaded. */
7075 breakpoint_re_set (void)
7077 struct breakpoint
*b
, *temp
;
7078 enum language save_language
;
7079 int save_input_radix
;
7081 save_language
= current_language
->la_language
;
7082 save_input_radix
= input_radix
;
7083 ALL_BREAKPOINTS_SAFE (b
, temp
)
7085 /* Format possible error msg */
7086 char *message
= xstrprintf ("Error in re-setting breakpoint %d:\n",
7088 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7089 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7090 do_cleanups (cleanups
);
7092 set_language (save_language
);
7093 input_radix
= save_input_radix
;
7095 if (GET_LONGJMP_TARGET_P ())
7097 create_longjmp_breakpoint ("longjmp");
7098 create_longjmp_breakpoint ("_longjmp");
7099 create_longjmp_breakpoint ("siglongjmp");
7100 create_longjmp_breakpoint ("_siglongjmp");
7101 create_longjmp_breakpoint (NULL
);
7104 create_overlay_event_breakpoint ("_ovly_debug_event");
7107 /* Reset the thread number of this breakpoint:
7109 - If the breakpoint is for all threads, leave it as-is.
7110 - Else, reset it to the current thread for inferior_ptid. */
7112 breakpoint_re_set_thread (struct breakpoint
*b
)
7114 if (b
->thread
!= -1)
7116 if (in_thread_list (inferior_ptid
))
7117 b
->thread
= pid_to_thread_id (inferior_ptid
);
7121 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7122 If from_tty is nonzero, it prints a message to that effect,
7123 which ends with a period (no newline). */
7126 set_ignore_count (int bptnum
, int count
, int from_tty
)
7128 struct breakpoint
*b
;
7134 if (b
->number
== bptnum
)
7136 b
->ignore_count
= count
;
7140 printf_filtered ("Will stop next time breakpoint %d is reached.",
7142 else if (count
== 1)
7143 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7146 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7149 breakpoints_changed ();
7150 breakpoint_modify_event (b
->number
);
7154 error ("No breakpoint number %d.", bptnum
);
7157 /* Clear the ignore counts of all breakpoints. */
7159 breakpoint_clear_ignore_counts (void)
7161 struct breakpoint
*b
;
7164 b
->ignore_count
= 0;
7167 /* Command to set ignore-count of breakpoint N to COUNT. */
7170 ignore_command (char *args
, int from_tty
)
7176 error_no_arg ("a breakpoint number");
7178 num
= get_number (&p
);
7180 error ("bad breakpoint number: '%s'", args
);
7182 error ("Second argument (specified ignore-count) is missing.");
7184 set_ignore_count (num
,
7185 longest_to_int (value_as_long (parse_and_eval (p
))),
7188 printf_filtered ("\n");
7191 /* Call FUNCTION on each of the breakpoints
7192 whose numbers are given in ARGS. */
7195 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7200 struct breakpoint
*b
, *tmp
;
7204 error_no_arg ("one or more breakpoint numbers");
7211 num
= get_number_or_range (&p1
);
7214 warning ("bad breakpoint number at or near '%s'", p
);
7218 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7219 if (b
->number
== num
)
7221 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7224 if (related_breakpoint
)
7225 function (related_breakpoint
);
7229 printf_unfiltered ("No breakpoint number %d.\n", num
);
7235 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7236 If from_tty is nonzero, it prints a message to that effect,
7237 which ends with a period (no newline). */
7240 disable_breakpoint (struct breakpoint
*bpt
)
7242 /* Never disable a watchpoint scope breakpoint; we want to
7243 hit them when we leave scope so we can delete both the
7244 watchpoint and its scope breakpoint at that time. */
7245 if (bpt
->type
== bp_watchpoint_scope
)
7248 /* You can't disable permanent breakpoints. */
7249 if (bpt
->enable_state
== bp_permanent
)
7252 bpt
->enable_state
= bp_disabled
;
7254 check_duplicates (bpt
);
7256 if (modify_breakpoint_hook
)
7257 modify_breakpoint_hook (bpt
);
7258 breakpoint_modify_event (bpt
->number
);
7262 disable_command (char *args
, int from_tty
)
7264 struct breakpoint
*bpt
;
7266 ALL_BREAKPOINTS (bpt
)
7270 warning ("attempted to disable apparently deleted breakpoint #%d?",
7275 case bp_catch_unload
:
7277 case bp_catch_vfork
:
7279 case bp_catch_catch
:
7280 case bp_catch_throw
:
7281 case bp_hardware_breakpoint
:
7283 case bp_hardware_watchpoint
:
7284 case bp_read_watchpoint
:
7285 case bp_access_watchpoint
:
7286 disable_breakpoint (bpt
);
7291 map_breakpoint_numbers (args
, disable_breakpoint
);
7295 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7297 struct frame_info
*save_selected_frame
= NULL
;
7298 int save_selected_frame_level
= -1;
7299 int target_resources_ok
, other_type_used
;
7302 if (bpt
->type
== bp_hardware_breakpoint
)
7305 i
= hw_breakpoint_used_count ();
7306 target_resources_ok
=
7307 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7309 if (target_resources_ok
== 0)
7310 error ("No hardware breakpoint support in the target.");
7311 else if (target_resources_ok
< 0)
7312 error ("Hardware breakpoints used exceeds limit.");
7315 if (bpt
->enable_state
!= bp_permanent
)
7316 bpt
->enable_state
= bp_enabled
;
7317 bpt
->disposition
= disposition
;
7318 check_duplicates (bpt
);
7319 breakpoints_changed ();
7321 if (bpt
->type
== bp_watchpoint
||
7322 bpt
->type
== bp_hardware_watchpoint
||
7323 bpt
->type
== bp_read_watchpoint
||
7324 bpt
->type
== bp_access_watchpoint
)
7326 if (bpt
->exp_valid_block
!= NULL
)
7328 struct frame_info
*fr
=
7329 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7333 Cannot enable watchpoint %d because the block in which its expression\n\
7334 is valid is not currently in scope.\n", bpt
->number
);
7335 bpt
->enable_state
= bp_disabled
;
7339 save_selected_frame
= deprecated_selected_frame
;
7340 save_selected_frame_level
= frame_relative_level (deprecated_selected_frame
);
7344 value_free (bpt
->val
);
7345 mark
= value_mark ();
7346 bpt
->val
= evaluate_expression (bpt
->exp
);
7347 release_value (bpt
->val
);
7348 if (VALUE_LAZY (bpt
->val
))
7349 value_fetch_lazy (bpt
->val
);
7351 if (bpt
->type
== bp_hardware_watchpoint
||
7352 bpt
->type
== bp_read_watchpoint
||
7353 bpt
->type
== bp_access_watchpoint
)
7355 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7356 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7358 /* Hack around 'unused var' error for some targets here */
7360 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7361 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7362 /* we can consider of type is bp_hardware_watchpoint, convert to
7363 bp_watchpoint in the following condition */
7364 if (target_resources_ok
< 0)
7367 Cannot enable watchpoint %d because target watch resources\n\
7368 have been allocated for other watchpoints.\n", bpt
->number
);
7369 bpt
->enable_state
= bp_disabled
;
7370 value_free_to_mark (mark
);
7375 if (save_selected_frame_level
>= 0)
7376 select_frame (save_selected_frame
);
7377 value_free_to_mark (mark
);
7379 if (modify_breakpoint_hook
)
7380 modify_breakpoint_hook (bpt
);
7381 breakpoint_modify_event (bpt
->number
);
7385 enable_breakpoint (struct breakpoint
*bpt
)
7387 do_enable_breakpoint (bpt
, bpt
->disposition
);
7390 /* The enable command enables the specified breakpoints (or all defined
7391 breakpoints) so they once again become (or continue to be) effective
7392 in stopping the inferior. */
7395 enable_command (char *args
, int from_tty
)
7397 struct breakpoint
*bpt
;
7399 ALL_BREAKPOINTS (bpt
)
7403 warning ("attempted to enable apparently deleted breakpoint #%d?",
7408 case bp_catch_unload
:
7410 case bp_catch_vfork
:
7412 case bp_catch_catch
:
7413 case bp_catch_throw
:
7414 case bp_hardware_breakpoint
:
7416 case bp_hardware_watchpoint
:
7417 case bp_read_watchpoint
:
7418 case bp_access_watchpoint
:
7419 enable_breakpoint (bpt
);
7424 map_breakpoint_numbers (args
, enable_breakpoint
);
7428 enable_once_breakpoint (struct breakpoint
*bpt
)
7430 do_enable_breakpoint (bpt
, disp_disable
);
7434 enable_once_command (char *args
, int from_tty
)
7436 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7440 enable_delete_breakpoint (struct breakpoint
*bpt
)
7442 do_enable_breakpoint (bpt
, disp_del
);
7446 enable_delete_command (char *args
, int from_tty
)
7448 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7451 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7453 struct symtabs_and_lines
7454 decode_line_spec_1 (char *string
, int funfirstline
)
7456 struct symtabs_and_lines sals
;
7458 error ("Empty line specification.");
7459 if (default_breakpoint_valid
)
7460 sals
= decode_line_1 (&string
, funfirstline
,
7461 default_breakpoint_symtab
,
7462 default_breakpoint_line
,
7463 (char ***) NULL
, NULL
);
7465 sals
= decode_line_1 (&string
, funfirstline
,
7466 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
7468 error ("Junk at end of line specification: %s", string
);
7473 _initialize_breakpoint (void)
7475 struct cmd_list_element
*c
;
7477 breakpoint_chain
= 0;
7478 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7479 before a breakpoint is set. */
7480 breakpoint_count
= 0;
7482 add_com ("ignore", class_breakpoint
, ignore_command
,
7483 "Set ignore-count of breakpoint number N to COUNT.\n\
7484 Usage is `ignore N COUNT'.");
7486 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
7488 add_com ("commands", class_breakpoint
, commands_command
,
7489 "Set commands to be executed when a breakpoint is hit.\n\
7490 Give breakpoint number as argument after \"commands\".\n\
7491 With no argument, the targeted breakpoint is the last one set.\n\
7492 The commands themselves follow starting on the next line.\n\
7493 Type a line containing \"end\" to indicate the end of them.\n\
7494 Give \"silent\" as the first line to make the breakpoint silent;\n\
7495 then no output is printed when it is hit, except what the commands print.");
7497 add_com ("condition", class_breakpoint
, condition_command
,
7498 "Specify breakpoint number N to break only if COND is true.\n\
7499 Usage is `condition N COND', where N is an integer and COND is an\n\
7500 expression to be evaluated whenever breakpoint N is reached.");
7502 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
,
7503 "Set a temporary breakpoint. Args like \"break\" command.\n\
7504 Like \"break\" except the breakpoint is only temporary,\n\
7505 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7506 by using \"enable delete\" on the breakpoint number.");
7507 set_cmd_completer (c
, location_completer
);
7509 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
,
7510 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7511 Like \"break\" except the breakpoint requires hardware support,\n\
7512 some target hardware may not have this support.");
7513 set_cmd_completer (c
, location_completer
);
7515 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
,
7516 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7517 Like \"hbreak\" except the breakpoint is only temporary,\n\
7518 so it will be deleted when hit.");
7519 set_cmd_completer (c
, location_completer
);
7521 add_prefix_cmd ("enable", class_breakpoint
, enable_command
,
7522 "Enable some breakpoints.\n\
7523 Give breakpoint numbers (separated by spaces) as arguments.\n\
7524 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7525 This is used to cancel the effect of the \"disable\" command.\n\
7526 With a subcommand you can enable temporarily.",
7527 &enablelist
, "enable ", 1, &cmdlist
);
7529 add_com ("ab", class_breakpoint
, enable_command
,
7530 "Enable some breakpoints.\n\
7531 Give breakpoint numbers (separated by spaces) as arguments.\n\
7532 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7533 This is used to cancel the effect of the \"disable\" command.\n\
7534 With a subcommand you can enable temporarily.");
7536 add_com_alias ("en", "enable", class_breakpoint
, 1);
7538 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
,
7539 "Enable some breakpoints.\n\
7540 Give breakpoint numbers (separated by spaces) as arguments.\n\
7541 This is used to cancel the effect of the \"disable\" command.\n\
7542 May be abbreviated to simply \"enable\".\n",
7543 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
7545 add_cmd ("once", no_class
, enable_once_command
,
7546 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7547 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7550 add_cmd ("delete", no_class
, enable_delete_command
,
7551 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7552 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7555 add_cmd ("delete", no_class
, enable_delete_command
,
7556 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7557 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7560 add_cmd ("once", no_class
, enable_once_command
,
7561 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7562 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7565 add_prefix_cmd ("disable", class_breakpoint
, disable_command
,
7566 "Disable some breakpoints.\n\
7567 Arguments are breakpoint numbers with spaces in between.\n\
7568 To disable all breakpoints, give no argument.\n\
7569 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7570 &disablelist
, "disable ", 1, &cmdlist
);
7571 add_com_alias ("dis", "disable", class_breakpoint
, 1);
7572 add_com_alias ("disa", "disable", class_breakpoint
, 1);
7574 add_com ("sb", class_breakpoint
, disable_command
,
7575 "Disable some breakpoints.\n\
7576 Arguments are breakpoint numbers with spaces in between.\n\
7577 To disable all breakpoints, give no argument.\n\
7578 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7580 add_cmd ("breakpoints", class_alias
, disable_command
,
7581 "Disable some breakpoints.\n\
7582 Arguments are breakpoint numbers with spaces in between.\n\
7583 To disable all breakpoints, give no argument.\n\
7584 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7585 This command may be abbreviated \"disable\".",
7588 add_prefix_cmd ("delete", class_breakpoint
, delete_command
,
7589 "Delete some breakpoints or auto-display expressions.\n\
7590 Arguments are breakpoint numbers with spaces in between.\n\
7591 To delete all breakpoints, give no argument.\n\
7593 Also a prefix command for deletion of other GDB objects.\n\
7594 The \"unset\" command is also an alias for \"delete\".",
7595 &deletelist
, "delete ", 1, &cmdlist
);
7596 add_com_alias ("d", "delete", class_breakpoint
, 1);
7598 add_com ("db", class_breakpoint
, delete_command
,
7599 "Delete some breakpoints.\n\
7600 Arguments are breakpoint numbers with spaces in between.\n\
7601 To delete all breakpoints, give no argument.\n");
7603 add_cmd ("breakpoints", class_alias
, delete_command
,
7604 "Delete some breakpoints or auto-display expressions.\n\
7605 Arguments are breakpoint numbers with spaces in between.\n\
7606 To delete all breakpoints, give no argument.\n\
7607 This command may be abbreviated \"delete\".",
7610 add_com ("clear", class_breakpoint
, clear_command
,
7611 concat ("Clear breakpoint at specified line or function.\n\
7612 Argument may be line number, function name, or \"*\" and an address.\n\
7613 If line number is specified, all breakpoints in that line are cleared.\n\
7614 If function is specified, breakpoints at beginning of function are cleared.\n\
7615 If an address is specified, breakpoints at that address are cleared.\n\n",
7616 "With no argument, clears all breakpoints in the line that the selected frame\n\
7619 See also the \"delete\" command which clears breakpoints by number.", NULL
));
7621 c
= add_com ("break", class_breakpoint
, break_command
,
7622 concat ("Set breakpoint at specified line or function.\n\
7623 Argument may be line number, function name, or \"*\" and an address.\n\
7624 If line number is specified, break at start of code for that line.\n\
7625 If function is specified, break at start of code for that function.\n\
7626 If an address is specified, break at that exact address.\n",
7627 "With no arg, uses current execution address of selected stack frame.\n\
7628 This is useful for breaking on return to a stack frame.\n\
7630 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7632 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL
));
7633 set_cmd_completer (c
, location_completer
);
7635 add_com_alias ("b", "break", class_run
, 1);
7636 add_com_alias ("br", "break", class_run
, 1);
7637 add_com_alias ("bre", "break", class_run
, 1);
7638 add_com_alias ("brea", "break", class_run
, 1);
7642 add_com_alias ("ba", "break", class_breakpoint
, 1);
7643 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
7648 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
,
7649 "Break in function/address or break at a line in the current file.",
7650 &stoplist
, "stop ", 1, &cmdlist
);
7651 add_cmd ("in", class_breakpoint
, stopin_command
,
7652 "Break in function or address.\n", &stoplist
);
7653 add_cmd ("at", class_breakpoint
, stopat_command
,
7654 "Break at a line in the current file.\n", &stoplist
);
7655 add_com ("status", class_info
, breakpoints_info
,
7656 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7657 The \"Type\" column indicates one of:\n\
7658 \tbreakpoint - normal breakpoint\n\
7659 \twatchpoint - watchpoint\n\
7660 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7661 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7662 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7663 address and file/line number respectively.\n\n",
7664 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7665 are set to the address of the last breakpoint listed.\n\n\
7666 Convenience variable \"$bpnum\" contains the number of the last\n\
7667 breakpoint set.", NULL
));
7670 add_info ("breakpoints", breakpoints_info
,
7671 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7672 The \"Type\" column indicates one of:\n\
7673 \tbreakpoint - normal breakpoint\n\
7674 \twatchpoint - watchpoint\n\
7675 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7676 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7677 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7678 address and file/line number respectively.\n\n",
7679 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7680 are set to the address of the last breakpoint listed.\n\n\
7681 Convenience variable \"$bpnum\" contains the number of the last\n\
7682 breakpoint set.", NULL
));
7685 add_com ("lb", class_breakpoint
, breakpoints_info
,
7686 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7687 The \"Type\" column indicates one of:\n\
7688 \tbreakpoint - normal breakpoint\n\
7689 \twatchpoint - watchpoint\n\
7690 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7691 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7692 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7693 address and file/line number respectively.\n\n",
7694 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7695 are set to the address of the last breakpoint listed.\n\n\
7696 Convenience variable \"$bpnum\" contains the number of the last\n\
7697 breakpoint set.", NULL
));
7699 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
,
7700 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7701 The \"Type\" column indicates one of:\n\
7702 \tbreakpoint - normal breakpoint\n\
7703 \twatchpoint - watchpoint\n\
7704 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7705 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7706 \tuntil - internal breakpoint used by the \"until\" command\n\
7707 \tfinish - internal breakpoint used by the \"finish\" command\n",
7708 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7709 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7710 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7711 address and file/line number respectively.\n\n",
7712 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7713 are set to the address of the last breakpoint listed.\n\n\
7714 Convenience variable \"$bpnum\" contains the number of the last\n\
7715 breakpoint set.", NULL
),
7716 &maintenanceinfolist
);
7718 add_com ("catch", class_breakpoint
, catch_command
,
7719 "Set catchpoints to catch events.\n\
7720 Raised signals may be caught:\n\
7721 \tcatch signal - all signals\n\
7722 \tcatch signal <signame> - a particular signal\n\
7723 Raised exceptions may be caught:\n\
7724 \tcatch throw - all exceptions, when thrown\n\
7725 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7726 \tcatch catch - all exceptions, when caught\n\
7727 \tcatch catch <exceptname> - a particular exception, when caught\n\
7728 Thread or process events may be caught:\n\
7729 \tcatch thread_start - any threads, just after creation\n\
7730 \tcatch thread_exit - any threads, just before expiration\n\
7731 \tcatch thread_join - any threads, just after joins\n\
7732 Process events may be caught:\n\
7733 \tcatch start - any processes, just after creation\n\
7734 \tcatch exit - any processes, just before expiration\n\
7735 \tcatch fork - calls to fork()\n\
7736 \tcatch vfork - calls to vfork()\n\
7737 \tcatch exec - calls to exec()\n\
7738 Dynamically-linked library events may be caught:\n\
7739 \tcatch load - loads of any library\n\
7740 \tcatch load <libname> - loads of a particular library\n\
7741 \tcatch unload - unloads of any library\n\
7742 \tcatch unload <libname> - unloads of a particular library\n\
7743 The act of your program's execution stopping may also be caught:\n\
7745 C++ exceptions may be caught:\n\
7746 \tcatch throw - all exceptions, when thrown\n\
7747 \tcatch catch - all exceptions, when caught\n\
7749 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7750 after a fork or vfork is caught.\n\n\
7751 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7753 add_com ("tcatch", class_breakpoint
, tcatch_command
,
7754 "Set temporary catchpoints to catch events.\n\
7755 Args like \"catch\" command.\n\
7756 Like \"catch\" except the catchpoint is only temporary,\n\
7757 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7758 by using \"enable delete\" on the catchpoint number.");
7760 c
= add_com ("watch", class_breakpoint
, watch_command
,
7761 "Set a watchpoint for an expression.\n\
7762 A watchpoint stops execution of your program whenever the value of\n\
7763 an expression changes.");
7764 set_cmd_completer (c
, location_completer
);
7766 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
,
7767 "Set a read watchpoint for an expression.\n\
7768 A watchpoint stops execution of your program whenever the value of\n\
7769 an expression is read.");
7770 set_cmd_completer (c
, location_completer
);
7772 c
= add_com ("awatch", class_breakpoint
, awatch_command
,
7773 "Set a watchpoint for an expression.\n\
7774 A watchpoint stops execution of your program whenever the value of\n\
7775 an expression is either read or written.");
7776 set_cmd_completer (c
, location_completer
);
7778 add_info ("watchpoints", breakpoints_info
,
7779 "Synonym for ``info breakpoints''.");
7782 c
= add_set_cmd ("can-use-hw-watchpoints", class_support
, var_zinteger
,
7783 (char *) &can_use_hw_watchpoints
,
7784 "Set debugger's willingness to use watchpoint hardware.\n\
7785 If zero, gdb will not use hardware for new watchpoints, even if\n\
7786 such is available. (However, any hardware watchpoints that were\n\
7787 created before setting this to nonzero, will continue to use watchpoint\n\
7790 add_show_from_set (c
, &showlist
);
7792 can_use_hw_watchpoints
= 1;