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 /* Return nonzero if FRAME is a dummy frame. We can't use
1721 DEPRECATED_PC_IN_CALL_DUMMY because figuring out the saved SP would
1722 take too much time, at least using frame_register() on the 68k.
1723 This means that for this function to work right a port must use the
1724 bp_call_dummy breakpoint. */
1727 deprecated_frame_in_dummy (struct frame_info
*frame
)
1729 struct breakpoint
*b
;
1731 /* This function is used by two files: get_frame_type(), after first
1732 checking that !DEPRECATED_USE_GENERIC_DUMMY_FRAMES; and
1733 sparc-tdep.c, which doesn't yet use generic dummy frames anyway. */
1734 gdb_assert (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES
);
1738 if (b
->type
== bp_call_dummy
1739 && frame_id_eq (b
->frame_id
, get_frame_id (frame
))
1740 /* We need to check the PC as well as the frame on the sparc,
1741 for signals.exp in the testsuite. */
1742 && (get_frame_pc (frame
)
1744 - DEPRECATED_SIZEOF_CALL_DUMMY_WORDS
/ sizeof (LONGEST
) * DEPRECATED_REGISTER_SIZE
))
1745 && get_frame_pc (frame
) <= b
->loc
->address
)
1751 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1752 PC is valid for process/thread PTID. */
1755 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1757 struct bp_location
*bpt
;
1760 thread
= pid_to_thread_id (ptid
);
1762 ALL_BP_LOCATIONS (bpt
)
1764 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1765 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1768 if ((breakpoint_enabled (bpt
->owner
)
1769 || bpt
->owner
->enable_state
== bp_permanent
)
1770 && bpt
->address
== pc
1771 && (bpt
->owner
->thread
== -1 || bpt
->owner
->thread
== thread
))
1773 if (overlay_debugging
1774 && section_is_overlay (bpt
->section
)
1775 && !section_is_mapped (bpt
->section
))
1776 continue; /* unmapped overlay -- can't be a match */
1786 /* bpstat stuff. External routines' interfaces are documented
1790 ep_is_catchpoint (struct breakpoint
*ep
)
1793 (ep
->type
== bp_catch_load
)
1794 || (ep
->type
== bp_catch_unload
)
1795 || (ep
->type
== bp_catch_fork
)
1796 || (ep
->type
== bp_catch_vfork
)
1797 || (ep
->type
== bp_catch_exec
)
1798 || (ep
->type
== bp_catch_catch
)
1799 || (ep
->type
== bp_catch_throw
);
1801 /* ??rehrauer: Add more kinds here, as are implemented... */
1805 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1808 (ep
->type
== bp_catch_load
)
1809 || (ep
->type
== bp_catch_unload
);
1813 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1816 (ep
->type
== bp_catch_catch
)
1817 || (ep
->type
== bp_catch_throw
);
1820 /* Clear a bpstat so that it says we are not at any breakpoint.
1821 Also free any storage that is part of a bpstat. */
1824 bpstat_clear (bpstat
*bsp
)
1835 if (p
->old_val
!= NULL
)
1836 value_free (p
->old_val
);
1837 free_command_lines (&p
->commands
);
1844 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1845 is part of the bpstat is copied as well. */
1848 bpstat_copy (bpstat bs
)
1852 bpstat retval
= NULL
;
1857 for (; bs
!= NULL
; bs
= bs
->next
)
1859 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1860 memcpy (tmp
, bs
, sizeof (*tmp
));
1861 if (bs
->commands
!= NULL
)
1862 tmp
->commands
= copy_command_lines (bs
->commands
);
1863 if (bs
->old_val
!= NULL
)
1864 tmp
->old_val
= value_copy (bs
->old_val
);
1867 /* This is the first thing in the chain. */
1877 /* Find the bpstat associated with this breakpoint */
1880 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1885 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1887 if (bsp
->breakpoint_at
== breakpoint
)
1893 /* Find a step_resume breakpoint associated with this bpstat.
1894 (If there are multiple step_resume bp's on the list, this function
1895 will arbitrarily pick one.)
1897 It is an error to use this function if BPSTAT doesn't contain a
1898 step_resume breakpoint.
1900 See wait_for_inferior's use of this function. */
1902 bpstat_find_step_resume_breakpoint (bpstat bsp
)
1907 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1909 current_thread
= pid_to_thread_id (inferior_ptid
);
1911 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1913 if ((bsp
->breakpoint_at
!= NULL
) &&
1914 (bsp
->breakpoint_at
->type
== bp_step_resume
) &&
1915 (bsp
->breakpoint_at
->thread
== current_thread
||
1916 bsp
->breakpoint_at
->thread
== -1))
1917 return bsp
->breakpoint_at
;
1920 error ("Internal error (no step_resume breakpoint found)");
1924 /* Return the breakpoint number of the first breakpoint we are stopped
1925 at. *BSP upon return is a bpstat which points to the remaining
1926 breakpoints stopped at (but which is not guaranteed to be good for
1927 anything but further calls to bpstat_num).
1928 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1931 bpstat_num (bpstat
*bsp
)
1933 struct breakpoint
*b
;
1936 return 0; /* No more breakpoint values */
1939 b
= (*bsp
)->breakpoint_at
;
1940 *bsp
= (*bsp
)->next
;
1942 return -1; /* breakpoint that's been deleted since */
1944 return b
->number
; /* We have its number */
1948 /* Modify BS so that the actions will not be performed. */
1951 bpstat_clear_actions (bpstat bs
)
1953 for (; bs
!= NULL
; bs
= bs
->next
)
1955 free_command_lines (&bs
->commands
);
1956 if (bs
->old_val
!= NULL
)
1958 value_free (bs
->old_val
);
1964 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1966 cleanup_executing_breakpoints (void *ignore
)
1968 executing_breakpoint_commands
= 0;
1971 /* Execute all the commands associated with all the breakpoints at this
1972 location. Any of these commands could cause the process to proceed
1973 beyond this point, etc. We look out for such changes by checking
1974 the global "breakpoint_proceeded" after each command. */
1977 bpstat_do_actions (bpstat
*bsp
)
1980 struct cleanup
*old_chain
;
1982 /* Avoid endless recursion if a `source' command is contained
1984 if (executing_breakpoint_commands
)
1987 executing_breakpoint_commands
= 1;
1988 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
1991 /* Note that (as of this writing), our callers all appear to
1992 be passing us the address of global stop_bpstat. And, if
1993 our calls to execute_control_command cause the inferior to
1994 proceed, that global (and hence, *bsp) will change.
1996 We must be careful to not touch *bsp unless the inferior
1997 has not proceeded. */
1999 /* This pointer will iterate over the list of bpstat's. */
2002 breakpoint_proceeded
= 0;
2003 for (; bs
!= NULL
; bs
= bs
->next
)
2005 struct command_line
*cmd
;
2006 struct cleanup
*this_cmd_tree_chain
;
2008 /* Take ownership of the BSP's command tree, if it has one.
2010 The command tree could legitimately contain commands like
2011 'step' and 'next', which call clear_proceed_status, which
2012 frees stop_bpstat's command tree. To make sure this doesn't
2013 free the tree we're executing out from under us, we need to
2014 take ownership of the tree ourselves. Since a given bpstat's
2015 commands are only executed once, we don't need to copy it; we
2016 can clear the pointer in the bpstat, and make sure we free
2017 the tree when we're done. */
2020 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2024 execute_control_command (cmd
);
2026 if (breakpoint_proceeded
)
2032 /* We can free this command tree now. */
2033 do_cleanups (this_cmd_tree_chain
);
2035 if (breakpoint_proceeded
)
2036 /* The inferior is proceeded by the command; bomb out now.
2037 The bpstat chain has been blown away by wait_for_inferior.
2038 But since execution has stopped again, there is a new bpstat
2039 to look at, so start over. */
2042 do_cleanups (old_chain
);
2045 /* This is the normal print function for a bpstat. In the future,
2046 much of this logic could (should?) be moved to bpstat_stop_status,
2047 by having it set different print_it values.
2049 Current scheme: When we stop, bpstat_print() is called. It loops
2050 through the bpstat list of things causing this stop, calling the
2051 print_bp_stop_message function on each one. The behavior of the
2052 print_bp_stop_message function depends on the print_it field of
2053 bpstat. If such field so indicates, call this function here.
2055 Return values from this routine (ultimately used by bpstat_print()
2056 and normal_stop() to decide what to do):
2057 PRINT_NOTHING: Means we already printed all we needed to print,
2058 don't print anything else.
2059 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2060 that something to be followed by a location.
2061 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2062 that something to be followed by a location.
2063 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2066 static enum print_stop_action
2067 print_it_typical (bpstat bs
)
2069 struct cleanup
*old_chain
, *ui_out_chain
;
2070 struct ui_stream
*stb
;
2071 stb
= ui_out_stream_new (uiout
);
2072 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2073 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2074 which has since been deleted. */
2075 if (bs
->breakpoint_at
== NULL
)
2076 return PRINT_UNKNOWN
;
2078 switch (bs
->breakpoint_at
->type
)
2081 case bp_hardware_breakpoint
:
2082 if (bs
->breakpoint_at
->loc
->address
!= bs
->breakpoint_at
->loc
->requested_address
)
2083 breakpoint_adjustment_warning (bs
->breakpoint_at
->loc
->requested_address
,
2084 bs
->breakpoint_at
->loc
->address
,
2085 bs
->breakpoint_at
->number
, 1);
2086 annotate_breakpoint (bs
->breakpoint_at
->number
);
2087 ui_out_text (uiout
, "\nBreakpoint ");
2088 if (ui_out_is_mi_like_p (uiout
))
2089 ui_out_field_string (uiout
, "reason", "breakpoint-hit");
2090 ui_out_field_int (uiout
, "bkptno", bs
->breakpoint_at
->number
);
2091 ui_out_text (uiout
, ", ");
2092 return PRINT_SRC_AND_LOC
;
2095 case bp_shlib_event
:
2096 /* Did we stop because the user set the stop_on_solib_events
2097 variable? (If so, we report this as a generic, "Stopped due
2098 to shlib event" message.) */
2099 printf_filtered ("Stopped due to shared library event\n");
2100 return PRINT_NOTHING
;
2103 case bp_thread_event
:
2104 /* Not sure how we will get here.
2105 GDB should not stop for these breakpoints. */
2106 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
2107 return PRINT_NOTHING
;
2110 case bp_overlay_event
:
2111 /* By analogy with the thread event, GDB should not stop for these. */
2112 printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n");
2113 return PRINT_NOTHING
;
2117 annotate_catchpoint (bs
->breakpoint_at
->number
);
2118 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2119 printf_filtered ("loaded");
2120 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2121 return PRINT_SRC_AND_LOC
;
2124 case bp_catch_unload
:
2125 annotate_catchpoint (bs
->breakpoint_at
->number
);
2126 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2127 printf_filtered ("unloaded");
2128 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2129 return PRINT_SRC_AND_LOC
;
2133 annotate_catchpoint (bs
->breakpoint_at
->number
);
2134 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2135 printf_filtered ("forked");
2136 printf_filtered (" process %d), ",
2137 bs
->breakpoint_at
->forked_inferior_pid
);
2138 return PRINT_SRC_AND_LOC
;
2141 case bp_catch_vfork
:
2142 annotate_catchpoint (bs
->breakpoint_at
->number
);
2143 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2144 printf_filtered ("vforked");
2145 printf_filtered (" process %d), ",
2146 bs
->breakpoint_at
->forked_inferior_pid
);
2147 return PRINT_SRC_AND_LOC
;
2151 annotate_catchpoint (bs
->breakpoint_at
->number
);
2152 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
2153 bs
->breakpoint_at
->number
,
2154 bs
->breakpoint_at
->exec_pathname
);
2155 return PRINT_SRC_AND_LOC
;
2158 case bp_catch_catch
:
2159 if (current_exception_event
&&
2160 (CURRENT_EXCEPTION_KIND
== EX_EVENT_CATCH
))
2162 annotate_catchpoint (bs
->breakpoint_at
->number
);
2163 printf_filtered ("\nCatchpoint %d (exception caught), ",
2164 bs
->breakpoint_at
->number
);
2165 printf_filtered ("throw location ");
2166 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2167 printf_filtered ("%s:%d",
2168 CURRENT_EXCEPTION_THROW_FILE
,
2169 CURRENT_EXCEPTION_THROW_LINE
);
2171 printf_filtered ("unknown");
2173 printf_filtered (", catch location ");
2174 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2175 printf_filtered ("%s:%d",
2176 CURRENT_EXCEPTION_CATCH_FILE
,
2177 CURRENT_EXCEPTION_CATCH_LINE
);
2179 printf_filtered ("unknown");
2181 printf_filtered ("\n");
2182 /* don't bother to print location frame info */
2183 return PRINT_SRC_ONLY
;
2187 /* really throw, some other bpstat will handle it */
2188 return PRINT_UNKNOWN
;
2192 case bp_catch_throw
:
2193 if (current_exception_event
&&
2194 (CURRENT_EXCEPTION_KIND
== EX_EVENT_THROW
))
2196 annotate_catchpoint (bs
->breakpoint_at
->number
);
2197 printf_filtered ("\nCatchpoint %d (exception thrown), ",
2198 bs
->breakpoint_at
->number
);
2199 printf_filtered ("throw location ");
2200 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2201 printf_filtered ("%s:%d",
2202 CURRENT_EXCEPTION_THROW_FILE
,
2203 CURRENT_EXCEPTION_THROW_LINE
);
2205 printf_filtered ("unknown");
2207 printf_filtered (", catch location ");
2208 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2209 printf_filtered ("%s:%d",
2210 CURRENT_EXCEPTION_CATCH_FILE
,
2211 CURRENT_EXCEPTION_CATCH_LINE
);
2213 printf_filtered ("unknown");
2215 printf_filtered ("\n");
2216 /* don't bother to print location frame info */
2217 return PRINT_SRC_ONLY
;
2221 /* really catch, some other bpstat will handle it */
2222 return PRINT_UNKNOWN
;
2227 case bp_hardware_watchpoint
:
2228 if (bs
->old_val
!= NULL
)
2230 annotate_watchpoint (bs
->breakpoint_at
->number
);
2231 if (ui_out_is_mi_like_p (uiout
))
2232 ui_out_field_string (uiout
, "reason", "watchpoint-trigger");
2233 mention (bs
->breakpoint_at
);
2234 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2235 ui_out_text (uiout
, "\nOld value = ");
2236 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2237 ui_out_field_stream (uiout
, "old", stb
);
2238 ui_out_text (uiout
, "\nNew value = ");
2239 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2240 ui_out_field_stream (uiout
, "new", stb
);
2241 do_cleanups (ui_out_chain
);
2242 ui_out_text (uiout
, "\n");
2243 value_free (bs
->old_val
);
2246 /* More than one watchpoint may have been triggered. */
2247 return PRINT_UNKNOWN
;
2250 case bp_read_watchpoint
:
2251 if (ui_out_is_mi_like_p (uiout
))
2252 ui_out_field_string (uiout
, "reason", "read-watchpoint-trigger");
2253 mention (bs
->breakpoint_at
);
2254 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2255 ui_out_text (uiout
, "\nValue = ");
2256 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2257 ui_out_field_stream (uiout
, "value", stb
);
2258 do_cleanups (ui_out_chain
);
2259 ui_out_text (uiout
, "\n");
2260 return PRINT_UNKNOWN
;
2263 case bp_access_watchpoint
:
2264 if (bs
->old_val
!= NULL
)
2266 annotate_watchpoint (bs
->breakpoint_at
->number
);
2267 if (ui_out_is_mi_like_p (uiout
))
2268 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2269 mention (bs
->breakpoint_at
);
2270 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2271 ui_out_text (uiout
, "\nOld value = ");
2272 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2273 ui_out_field_stream (uiout
, "old", stb
);
2274 value_free (bs
->old_val
);
2276 ui_out_text (uiout
, "\nNew value = ");
2280 mention (bs
->breakpoint_at
);
2281 if (ui_out_is_mi_like_p (uiout
))
2282 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2283 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2284 ui_out_text (uiout
, "\nValue = ");
2286 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0,Val_pretty_default
);
2287 ui_out_field_stream (uiout
, "new", stb
);
2288 do_cleanups (ui_out_chain
);
2289 ui_out_text (uiout
, "\n");
2290 return PRINT_UNKNOWN
;
2293 /* Fall through, we don't deal with these types of breakpoints
2297 if (ui_out_is_mi_like_p (uiout
))
2298 ui_out_field_string (uiout
, "reason", "function-finished");
2299 return PRINT_UNKNOWN
;
2303 if (ui_out_is_mi_like_p (uiout
))
2304 ui_out_field_string (uiout
, "reason", "location-reached");
2305 return PRINT_UNKNOWN
;
2310 case bp_longjmp_resume
:
2311 case bp_step_resume
:
2312 case bp_through_sigtramp
:
2313 case bp_watchpoint_scope
:
2316 return PRINT_UNKNOWN
;
2320 /* Generic routine for printing messages indicating why we
2321 stopped. The behavior of this function depends on the value
2322 'print_it' in the bpstat structure. Under some circumstances we
2323 may decide not to print anything here and delegate the task to
2326 static enum print_stop_action
2327 print_bp_stop_message (bpstat bs
)
2329 switch (bs
->print_it
)
2332 /* Nothing should be printed for this bpstat entry. */
2333 return PRINT_UNKNOWN
;
2337 /* We still want to print the frame, but we already printed the
2338 relevant messages. */
2339 return PRINT_SRC_AND_LOC
;
2342 case print_it_normal
:
2343 /* Normal case. Call the breakpoint's print_it method, or
2344 print_it_typical. */
2345 if (bs
->breakpoint_at
!= NULL
&& bs
->breakpoint_at
->ops
!= NULL
2346 && bs
->breakpoint_at
->ops
->print_it
!= NULL
)
2347 return bs
->breakpoint_at
->ops
->print_it (bs
->breakpoint_at
);
2349 return print_it_typical (bs
);
2353 internal_error (__FILE__
, __LINE__
,
2354 "print_bp_stop_message: unrecognized enum value");
2359 /* Print a message indicating what happened. This is called from
2360 normal_stop(). The input to this routine is the head of the bpstat
2361 list - a list of the eventpoints that caused this stop. This
2362 routine calls the generic print routine for printing a message
2363 about reasons for stopping. This will print (for example) the
2364 "Breakpoint n," part of the output. The return value of this
2367 PRINT_UNKNOWN: Means we printed nothing
2368 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2369 code to print the location. An example is
2370 "Breakpoint 1, " which should be followed by
2372 PRINT_SRC_ONLY: Means we printed something, but there is no need
2373 to also print the location part of the message.
2374 An example is the catch/throw messages, which
2375 don't require a location appended to the end.
2376 PRINT_NOTHING: We have done some printing and we don't need any
2377 further info to be printed.*/
2379 enum print_stop_action
2380 bpstat_print (bpstat bs
)
2384 /* Maybe another breakpoint in the chain caused us to stop.
2385 (Currently all watchpoints go on the bpstat whether hit or not.
2386 That probably could (should) be changed, provided care is taken
2387 with respect to bpstat_explains_signal). */
2388 for (; bs
; bs
= bs
->next
)
2390 val
= print_bp_stop_message (bs
);
2391 if (val
== PRINT_SRC_ONLY
2392 || val
== PRINT_SRC_AND_LOC
2393 || val
== PRINT_NOTHING
)
2397 /* We reached the end of the chain, or we got a null BS to start
2398 with and nothing was printed. */
2399 return PRINT_UNKNOWN
;
2402 /* Evaluate the expression EXP and return 1 if value is zero.
2403 This is used inside a catch_errors to evaluate the breakpoint condition.
2404 The argument is a "struct expression *" that has been cast to char * to
2405 make it pass through catch_errors. */
2408 breakpoint_cond_eval (void *exp
)
2410 struct value
*mark
= value_mark ();
2411 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2412 value_free_to_mark (mark
);
2416 /* Allocate a new bpstat and chain it to the current one. */
2419 bpstat_alloc (struct breakpoint
*b
, bpstat cbs
/* Current "bs" value */ )
2423 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2425 bs
->breakpoint_at
= b
;
2426 /* If the condition is false, etc., don't do the commands. */
2427 bs
->commands
= NULL
;
2429 bs
->print_it
= print_it_normal
;
2433 /* Possible return values for watchpoint_check (this can't be an enum
2434 because of check_errors). */
2435 /* The watchpoint has been deleted. */
2436 #define WP_DELETED 1
2437 /* The value has changed. */
2438 #define WP_VALUE_CHANGED 2
2439 /* The value has not changed. */
2440 #define WP_VALUE_NOT_CHANGED 3
2442 #define BP_TEMPFLAG 1
2443 #define BP_HARDWAREFLAG 2
2445 /* Check watchpoint condition. */
2448 watchpoint_check (void *p
)
2450 bpstat bs
= (bpstat
) p
;
2451 struct breakpoint
*b
;
2452 struct frame_info
*fr
;
2453 int within_current_scope
;
2455 b
= bs
->breakpoint_at
;
2457 if (b
->exp_valid_block
== NULL
)
2458 within_current_scope
= 1;
2461 /* There is no current frame at this moment. If we're going to have
2462 any chance of handling watchpoints on local variables, we'll need
2463 the frame chain (so we can determine if we're in scope). */
2464 reinit_frame_cache ();
2465 fr
= frame_find_by_id (b
->watchpoint_frame
);
2466 within_current_scope
= (fr
!= NULL
);
2467 /* in_function_epilogue_p() returns a non-zero value if we're still
2468 in the function but the stack frame has already been invalidated.
2469 Since we can't rely on the values of local variables after the
2470 stack has been destroyed, we are treating the watchpoint in that
2471 state as `not changed' without further checking.
2473 vinschen/2003-09-04: The former implementation left out the case
2474 that the watchpoint frame couldn't be found by frame_find_by_id()
2475 because the current PC is currently in an epilogue. Calling
2476 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2477 if ((!within_current_scope
|| fr
== get_current_frame ())
2478 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2479 return WP_VALUE_NOT_CHANGED
;
2480 if (fr
&& within_current_scope
)
2481 /* If we end up stopping, the current frame will get selected
2482 in normal_stop. So this call to select_frame won't affect
2487 if (within_current_scope
)
2489 /* We use value_{,free_to_}mark because it could be a
2490 *long* time before we return to the command level and
2491 call free_all_values. We can't call free_all_values because
2492 we might be in the middle of evaluating a function call. */
2494 struct value
*mark
= value_mark ();
2495 struct value
*new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
2496 if (!value_equal (b
->val
, new_val
))
2498 release_value (new_val
);
2499 value_free_to_mark (mark
);
2500 bs
->old_val
= b
->val
;
2502 /* We will stop here */
2503 return WP_VALUE_CHANGED
;
2507 /* Nothing changed, don't do anything. */
2508 value_free_to_mark (mark
);
2509 /* We won't stop here */
2510 return WP_VALUE_NOT_CHANGED
;
2515 /* This seems like the only logical thing to do because
2516 if we temporarily ignored the watchpoint, then when
2517 we reenter the block in which it is valid it contains
2518 garbage (in the case of a function, it may have two
2519 garbage values, one before and one after the prologue).
2520 So we can't even detect the first assignment to it and
2521 watch after that (since the garbage may or may not equal
2522 the first value assigned). */
2523 /* We print all the stop information in print_it_typical(), but
2524 in this case, by the time we call print_it_typical() this bp
2525 will be deleted already. So we have no choice but print the
2526 information here. */
2527 if (ui_out_is_mi_like_p (uiout
))
2528 ui_out_field_string (uiout
, "reason", "watchpoint-scope");
2529 ui_out_text (uiout
, "\nWatchpoint ");
2530 ui_out_field_int (uiout
, "wpnum", bs
->breakpoint_at
->number
);
2531 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2532 which its expression is valid.\n");
2534 if (b
->related_breakpoint
)
2535 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2536 b
->disposition
= disp_del_at_next_stop
;
2542 /* Get a bpstat associated with having just stopped at address *PC
2543 and frame address CORE_ADDRESS. Update *PC to point at the
2544 breakpoint (if we hit a breakpoint). NOT_A_SW_BREAKPOINT is nonzero
2545 if this is known to not be a real breakpoint (it could still be a
2546 watchpoint, though). */
2548 /* Determine whether we stopped at a breakpoint, etc, or whether we
2549 don't understand this stop. Result is a chain of bpstat's such that:
2551 if we don't understand the stop, the result is a null pointer.
2553 if we understand why we stopped, the result is not null.
2555 Each element of the chain refers to a particular breakpoint or
2556 watchpoint at which we have stopped. (We may have stopped for
2557 several reasons concurrently.)
2559 Each element of the chain has valid next, breakpoint_at,
2560 commands, FIXME??? fields. */
2563 bpstat_stop_status (CORE_ADDR
*pc
, int not_a_sw_breakpoint
)
2565 struct breakpoint
*b
, *temp
;
2567 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2568 int real_breakpoint
= 0;
2569 /* Root of the chain of bpstat's */
2570 struct bpstats root_bs
[1];
2571 /* Pointer to the last thing in the chain currently. */
2572 bpstat bs
= root_bs
;
2574 /* Get the address where the breakpoint would have been. The
2575 "not_a_sw_breakpoint" argument is meant to distinguish between a
2576 breakpoint trap event and a trace/singlestep trap event. For a
2577 trace/singlestep trap event, we would not want to subtract
2578 DECR_PC_AFTER_BREAK from the PC. */
2580 bp_addr
= *pc
- (not_a_sw_breakpoint
? 0 : DECR_PC_AFTER_BREAK
);
2582 ALL_BREAKPOINTS_SAFE (b
, temp
)
2584 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
2587 if (b
->type
!= bp_watchpoint
2588 && b
->type
!= bp_hardware_watchpoint
2589 && b
->type
!= bp_read_watchpoint
2590 && b
->type
!= bp_access_watchpoint
2591 && b
->type
!= bp_hardware_breakpoint
2592 && b
->type
!= bp_catch_fork
2593 && b
->type
!= bp_catch_vfork
2594 && b
->type
!= bp_catch_exec
2595 && b
->type
!= bp_catch_catch
2596 && b
->type
!= bp_catch_throw
) /* a non-watchpoint bp */
2598 if (b
->loc
->address
!= bp_addr
) /* address doesn't match */
2600 if (overlay_debugging
/* unmapped overlay section */
2601 && section_is_overlay (b
->loc
->section
)
2602 && !section_is_mapped (b
->loc
->section
))
2606 if (b
->type
== bp_hardware_breakpoint
)
2608 if (b
->loc
->address
!= *pc
)
2610 if (overlay_debugging
/* unmapped overlay section */
2611 && section_is_overlay (b
->loc
->section
)
2612 && !section_is_mapped (b
->loc
->section
))
2616 /* Is this a catchpoint of a load or unload? If so, did we
2617 get a load or unload of the specified library? If not,
2619 if ((b
->type
== bp_catch_load
)
2620 #if defined(SOLIB_HAVE_LOAD_EVENT)
2621 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2622 || ((b
->dll_pathname
!= NULL
)
2623 && (strcmp (b
->dll_pathname
,
2624 SOLIB_LOADED_LIBRARY_PATHNAME (
2625 PIDGET (inferior_ptid
)))
2631 if ((b
->type
== bp_catch_unload
)
2632 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2633 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2634 || ((b
->dll_pathname
!= NULL
)
2635 && (strcmp (b
->dll_pathname
,
2636 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2637 PIDGET (inferior_ptid
)))
2643 if ((b
->type
== bp_catch_fork
)
2644 && !inferior_has_forked (PIDGET (inferior_ptid
),
2645 &b
->forked_inferior_pid
))
2648 if ((b
->type
== bp_catch_vfork
)
2649 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2650 &b
->forked_inferior_pid
))
2653 if ((b
->type
== bp_catch_exec
)
2654 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2657 if (ep_is_exception_catchpoint (b
) &&
2658 !(current_exception_event
= target_get_current_exception_event ()))
2661 /* Come here if it's a watchpoint, or if the break address matches */
2663 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
2665 /* Watchpoints may change this, if not found to have triggered. */
2669 if (b
->type
== bp_watchpoint
||
2670 b
->type
== bp_hardware_watchpoint
)
2672 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2674 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2675 int e
= catch_errors (watchpoint_check
, bs
, message
,
2677 do_cleanups (cleanups
);
2681 /* We've already printed what needs to be printed. */
2682 /* Actually this is superfluous, because by the time we
2683 call print_it_typical() the wp will be already deleted,
2684 and the function will return immediately. */
2685 bs
->print_it
= print_it_done
;
2688 case WP_VALUE_CHANGED
:
2692 case WP_VALUE_NOT_CHANGED
:
2694 bs
->print_it
= print_it_noop
;
2701 /* Error from catch_errors. */
2702 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2703 if (b
->related_breakpoint
)
2704 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2705 b
->disposition
= disp_del_at_next_stop
;
2706 /* We've already printed what needs to be printed. */
2707 bs
->print_it
= print_it_done
;
2713 else if (b
->type
== bp_read_watchpoint
||
2714 b
->type
== bp_access_watchpoint
)
2720 addr
= target_stopped_data_address ();
2723 for (v
= b
->val_chain
; v
; v
= v
->next
)
2725 if (VALUE_LVAL (v
) == lval_memory
2726 && ! VALUE_LAZY (v
))
2728 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
2730 if (v
== b
->val_chain
2731 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
2732 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
2736 vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
2737 /* Exact match not required. Within range is
2739 if (addr
>= vaddr
&&
2740 addr
< vaddr
+ TYPE_LENGTH (VALUE_TYPE (v
)))
2747 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2749 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2750 int e
= catch_errors (watchpoint_check
, bs
, message
,
2752 do_cleanups (cleanups
);
2756 /* We've already printed what needs to be printed. */
2757 bs
->print_it
= print_it_done
;
2760 case WP_VALUE_CHANGED
:
2761 if (b
->type
== bp_read_watchpoint
)
2763 /* Don't stop: read watchpoints shouldn't fire if
2764 the value has changed. This is for targets
2765 which cannot set read-only watchpoints. */
2766 bs
->print_it
= print_it_noop
;
2772 case WP_VALUE_NOT_CHANGED
:
2779 /* Error from catch_errors. */
2780 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2781 if (b
->related_breakpoint
)
2782 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2783 b
->disposition
= disp_del_at_next_stop
;
2784 /* We've already printed what needs to be printed. */
2785 bs
->print_it
= print_it_done
;
2789 else /* found == 0 */
2791 /* This is a case where some watchpoint(s) triggered,
2792 but not at the address of this watchpoint (FOUND
2793 was left zero). So don't print anything for this
2795 bs
->print_it
= print_it_noop
;
2802 /* By definition, an encountered breakpoint is a triggered
2806 real_breakpoint
= 1;
2809 if (frame_id_p (b
->frame_id
)
2810 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2814 int value_is_zero
= 0;
2818 /* Need to select the frame, with all that implies
2819 so that the conditions will have the right context. */
2820 select_frame (get_current_frame ());
2822 = catch_errors (breakpoint_cond_eval
, (b
->cond
),
2823 "Error in testing breakpoint condition:\n",
2825 /* FIXME-someday, should give breakpoint # */
2828 if (b
->cond
&& value_is_zero
)
2831 /* Don't consider this a hit. */
2834 else if (b
->ignore_count
> 0)
2837 annotate_ignore_count_change ();
2842 /* We will stop here */
2843 if (b
->disposition
== disp_disable
)
2844 b
->enable_state
= bp_disabled
;
2847 bs
->commands
= b
->commands
;
2849 (strcmp ("silent", bs
->commands
->line
) == 0
2850 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
2852 bs
->commands
= bs
->commands
->next
;
2855 bs
->commands
= copy_command_lines (bs
->commands
);
2858 /* Print nothing for this entry if we dont stop or if we dont print. */
2859 if (bs
->stop
== 0 || bs
->print
== 0)
2860 bs
->print_it
= print_it_noop
;
2863 bs
->next
= NULL
; /* Terminate the chain */
2864 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2866 if (real_breakpoint
&& bs
)
2868 if (bs
->breakpoint_at
->type
!= bp_hardware_breakpoint
)
2870 if (DECR_PC_AFTER_BREAK
!= 0)
2878 /* The value of a hardware watchpoint hasn't changed, but the
2879 intermediate memory locations we are watching may have. */
2880 if (bs
&& !bs
->stop
&&
2881 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2882 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2883 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2885 remove_breakpoints ();
2886 insert_breakpoints ();
2891 /* Tell what to do about this bpstat. */
2893 bpstat_what (bpstat bs
)
2895 /* Classify each bpstat as one of the following. */
2898 /* This bpstat element has no effect on the main_action. */
2901 /* There was a watchpoint, stop but don't print. */
2904 /* There was a watchpoint, stop and print. */
2907 /* There was a breakpoint but we're not stopping. */
2910 /* There was a breakpoint, stop but don't print. */
2913 /* There was a breakpoint, stop and print. */
2916 /* We hit the longjmp breakpoint. */
2919 /* We hit the longjmp_resume breakpoint. */
2922 /* We hit the step_resume breakpoint. */
2925 /* We hit the through_sigtramp breakpoint. */
2928 /* We hit the shared library event breakpoint. */
2931 /* We caught a shared library event. */
2934 /* This is just used to count how many enums there are. */
2938 /* Here is the table which drives this routine. So that we can
2939 format it pretty, we define some abbreviations for the
2940 enum bpstat_what codes. */
2941 #define kc BPSTAT_WHAT_KEEP_CHECKING
2942 #define ss BPSTAT_WHAT_STOP_SILENT
2943 #define sn BPSTAT_WHAT_STOP_NOISY
2944 #define sgl BPSTAT_WHAT_SINGLE
2945 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2946 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2947 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2948 #define sr BPSTAT_WHAT_STEP_RESUME
2949 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2950 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2951 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2953 /* "Can't happen." Might want to print an error message.
2954 abort() is not out of the question, but chances are GDB is just
2955 a bit confused, not unusable. */
2956 #define err BPSTAT_WHAT_STOP_NOISY
2958 /* Given an old action and a class, come up with a new action. */
2959 /* One interesting property of this table is that wp_silent is the same
2960 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2961 after stopping, the check for whether to step over a breakpoint
2962 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2963 reference to how we stopped. We retain separate wp_silent and
2964 bp_silent codes in case we want to change that someday.
2966 Another possibly interesting property of this table is that
2967 there's a partial ordering, priority-like, of the actions. Once
2968 you've decided that some action is appropriate, you'll never go
2969 back and decide something of a lower priority is better. The
2972 kc < clr sgl shl shlr slr sn sr ss ts
2973 sgl < clrs shl shlr slr sn sr ss ts
2974 slr < err shl shlr sn sr ss ts
2975 clr < clrs err shl shlr sn sr ss ts
2976 clrs < err shl shlr sn sr ss ts
2977 ss < shl shlr sn sr ts
2984 What I think this means is that we don't need a damned table
2985 here. If you just put the rows and columns in the right order,
2986 it'd look awfully regular. We could simply walk the bpstat list
2987 and choose the highest priority action we find, with a little
2988 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
2989 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
2990 is messy anyway). */
2992 /* step_resume entries: a step resume breakpoint overrides another
2993 breakpoint of signal handling (see comment in wait_for_inferior
2994 at first PC_IN_SIGTRAMP where we set the step_resume breakpoint). */
2995 /* We handle the through_sigtramp_breakpoint the same way; having both
2996 one of those and a step_resume_breakpoint is probably very rare (?). */
2998 static const enum bpstat_what_main_action
2999 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3002 /* kc ss sn sgl slr clr clrs sr ts shl shlr
3005 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, ts
, shl
, shlr
},
3007 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3009 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3011 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, ts
, shl
, shlr
},
3013 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3015 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3017 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, ts
, shl
, shlr
},
3019 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, ts
, shl
, shlr
},
3021 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, ts
, shl
, shlr
},
3023 {ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, shl
, shlr
},
3025 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, shl
, ts
, shl
, shlr
},
3027 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, ts
, shlr
, shlr
}
3042 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3043 struct bpstat_what retval
;
3045 retval
.call_dummy
= 0;
3046 for (; bs
!= NULL
; bs
= bs
->next
)
3048 enum class bs_class
= no_effect
;
3049 if (bs
->breakpoint_at
== NULL
)
3050 /* I suspect this can happen if it was a momentary breakpoint
3051 which has since been deleted. */
3053 switch (bs
->breakpoint_at
->type
)
3059 case bp_hardware_breakpoint
:
3065 bs_class
= bp_noisy
;
3067 bs_class
= bp_silent
;
3070 bs_class
= bp_nostop
;
3073 case bp_hardware_watchpoint
:
3074 case bp_read_watchpoint
:
3075 case bp_access_watchpoint
:
3079 bs_class
= wp_noisy
;
3081 bs_class
= wp_silent
;
3084 /* There was a watchpoint, but we're not stopping.
3085 This requires no further action. */
3086 bs_class
= no_effect
;
3089 bs_class
= long_jump
;
3091 case bp_longjmp_resume
:
3092 bs_class
= long_resume
;
3094 case bp_step_resume
:
3097 bs_class
= step_resume
;
3100 /* It is for the wrong frame. */
3101 bs_class
= bp_nostop
;
3103 case bp_through_sigtramp
:
3104 bs_class
= through_sig
;
3106 case bp_watchpoint_scope
:
3107 bs_class
= bp_nostop
;
3109 case bp_shlib_event
:
3110 bs_class
= shlib_event
;
3112 case bp_thread_event
:
3113 case bp_overlay_event
:
3114 bs_class
= bp_nostop
;
3117 case bp_catch_unload
:
3118 /* Only if this catchpoint triggered should we cause the
3119 step-out-of-dld behaviour. Otherwise, we ignore this
3122 bs_class
= catch_shlib_event
;
3124 bs_class
= no_effect
;
3127 case bp_catch_vfork
:
3132 bs_class
= bp_noisy
;
3134 bs_class
= bp_silent
;
3137 /* There was a catchpoint, but we're not stopping.
3138 This requires no further action. */
3139 bs_class
= no_effect
;
3141 case bp_catch_catch
:
3142 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
3143 bs_class
= bp_nostop
;
3145 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3147 case bp_catch_throw
:
3148 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
3149 bs_class
= bp_nostop
;
3151 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3154 /* Make sure the action is stop (silent or noisy),
3155 so infrun.c pops the dummy frame. */
3156 bs_class
= bp_silent
;
3157 retval
.call_dummy
= 1;
3160 current_action
= table
[(int) bs_class
][(int) current_action
];
3162 retval
.main_action
= current_action
;
3166 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3167 without hardware support). This isn't related to a specific bpstat,
3168 just to things like whether watchpoints are set. */
3171 bpstat_should_step (void)
3173 struct breakpoint
*b
;
3175 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
)
3180 /* Nonzero if there are enabled hardware watchpoints. */
3182 bpstat_have_active_hw_watchpoints (void)
3184 struct bp_location
*bpt
;
3185 ALL_BP_LOCATIONS (bpt
)
3186 if (breakpoint_enabled (bpt
->owner
)
3188 && bpt
->loc_type
== bp_loc_hardware_watchpoint
)
3194 /* Given a bpstat that records zero or more triggered eventpoints, this
3195 function returns another bpstat which contains only the catchpoints
3196 on that first list, if any. */
3198 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3200 struct bpstats root_bs
[1];
3201 bpstat bs
= root_bs
;
3202 struct breakpoint
*ep
;
3205 bpstat_clear (cp_list
);
3206 root_bs
->next
= NULL
;
3208 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3210 /* Is this eventpoint a catchpoint? If not, ignore it. */
3211 ep
= ep_list
->breakpoint_at
;
3214 if ((ep
->type
!= bp_catch_load
) &&
3215 (ep
->type
!= bp_catch_unload
) &&
3216 (ep
->type
!= bp_catch_catch
) &&
3217 (ep
->type
!= bp_catch_throw
))
3218 /* pai: (temp) ADD fork/vfork here!! */
3221 /* Yes; add it to the list. */
3222 bs
= bpstat_alloc (ep
, bs
);
3227 #if defined(SOLIB_ADD)
3228 /* Also, for each triggered catchpoint, tag it with the name of
3229 the library that caused this trigger. (We copy the name now,
3230 because it's only guaranteed to be available NOW, when the
3231 catchpoint triggers. Clients who may wish to know the name
3232 later must get it from the catchpoint itself.) */
3233 if (ep
->triggered_dll_pathname
!= NULL
)
3234 xfree (ep
->triggered_dll_pathname
);
3235 if (ep
->type
== bp_catch_load
)
3236 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3237 PIDGET (inferior_ptid
));
3239 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3240 PIDGET (inferior_ptid
));
3242 dll_pathname
= NULL
;
3246 ep
->triggered_dll_pathname
= (char *)
3247 xmalloc (strlen (dll_pathname
) + 1);
3248 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3251 ep
->triggered_dll_pathname
= NULL
;
3257 /* Print B to gdb_stdout. */
3259 print_one_breakpoint (struct breakpoint
*b
,
3260 CORE_ADDR
*last_addr
)
3262 struct command_line
*l
;
3264 struct ep_type_description
3269 static struct ep_type_description bptypes
[] =
3271 {bp_none
, "?deleted?"},
3272 {bp_breakpoint
, "breakpoint"},
3273 {bp_hardware_breakpoint
, "hw breakpoint"},
3274 {bp_until
, "until"},
3275 {bp_finish
, "finish"},
3276 {bp_watchpoint
, "watchpoint"},
3277 {bp_hardware_watchpoint
, "hw watchpoint"},
3278 {bp_read_watchpoint
, "read watchpoint"},
3279 {bp_access_watchpoint
, "acc watchpoint"},
3280 {bp_longjmp
, "longjmp"},
3281 {bp_longjmp_resume
, "longjmp resume"},
3282 {bp_step_resume
, "step resume"},
3283 {bp_through_sigtramp
, "sigtramp"},
3284 {bp_watchpoint_scope
, "watchpoint scope"},
3285 {bp_call_dummy
, "call dummy"},
3286 {bp_shlib_event
, "shlib events"},
3287 {bp_thread_event
, "thread events"},
3288 {bp_overlay_event
, "overlay events"},
3289 {bp_catch_load
, "catch load"},
3290 {bp_catch_unload
, "catch unload"},
3291 {bp_catch_fork
, "catch fork"},
3292 {bp_catch_vfork
, "catch vfork"},
3293 {bp_catch_exec
, "catch exec"},
3294 {bp_catch_catch
, "catch catch"},
3295 {bp_catch_throw
, "catch throw"}
3298 static char *bpdisps
[] =
3299 {"del", "dstp", "dis", "keep"};
3300 static char bpenables
[] = "nynny";
3301 char wrap_indent
[80];
3302 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3303 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3304 struct cleanup
*bkpt_chain
;
3307 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3311 ui_out_field_int (uiout
, "number", b
->number
);
3315 if (((int) b
->type
> (sizeof (bptypes
) / sizeof (bptypes
[0])))
3316 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3317 internal_error (__FILE__
, __LINE__
,
3318 "bptypes table does not describe type #%d.",
3320 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3324 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3328 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3329 ui_out_spaces (uiout
, 2);
3332 strcpy (wrap_indent
, " ");
3335 if (TARGET_ADDR_BIT
<= 32)
3336 strcat (wrap_indent
, " ");
3338 strcat (wrap_indent
, " ");
3341 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3342 b
->ops
->print_one (b
, last_addr
);
3347 internal_error (__FILE__
, __LINE__
,
3348 "print_one_breakpoint: bp_none encountered\n");
3352 case bp_hardware_watchpoint
:
3353 case bp_read_watchpoint
:
3354 case bp_access_watchpoint
:
3355 /* Field 4, the address, is omitted (which makes the columns
3356 not line up too nicely with the headers, but the effect
3357 is relatively readable). */
3359 ui_out_field_skip (uiout
, "addr");
3361 print_expression (b
->exp
, stb
->stream
);
3362 ui_out_field_stream (uiout
, "what", stb
);
3366 case bp_catch_unload
:
3367 /* Field 4, the address, is omitted (which makes the columns
3368 not line up too nicely with the headers, but the effect
3369 is relatively readable). */
3371 ui_out_field_skip (uiout
, "addr");
3373 if (b
->dll_pathname
== NULL
)
3375 ui_out_field_string (uiout
, "what", "<any library>");
3376 ui_out_spaces (uiout
, 1);
3380 ui_out_text (uiout
, "library \"");
3381 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3382 ui_out_text (uiout
, "\" ");
3387 case bp_catch_vfork
:
3388 /* Field 4, the address, is omitted (which makes the columns
3389 not line up too nicely with the headers, but the effect
3390 is relatively readable). */
3392 ui_out_field_skip (uiout
, "addr");
3394 if (b
->forked_inferior_pid
!= 0)
3396 ui_out_text (uiout
, "process ");
3397 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3398 ui_out_spaces (uiout
, 1);
3402 /* Field 4, the address, is omitted (which makes the columns
3403 not line up too nicely with the headers, but the effect
3404 is relatively readable). */
3406 ui_out_field_skip (uiout
, "addr");
3408 if (b
->exec_pathname
!= NULL
)
3410 ui_out_text (uiout
, "program \"");
3411 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3412 ui_out_text (uiout
, "\" ");
3416 case bp_catch_catch
:
3417 /* Field 4, the address, is omitted (which makes the columns
3418 not line up too nicely with the headers, but the effect
3419 is relatively readable). */
3421 ui_out_field_skip (uiout
, "addr");
3423 ui_out_field_string (uiout
, "what", "exception catch");
3424 ui_out_spaces (uiout
, 1);
3427 case bp_catch_throw
:
3428 /* Field 4, the address, is omitted (which makes the columns
3429 not line up too nicely with the headers, but the effect
3430 is relatively readable). */
3432 ui_out_field_skip (uiout
, "addr");
3434 ui_out_field_string (uiout
, "what", "exception throw");
3435 ui_out_spaces (uiout
, 1);
3439 case bp_hardware_breakpoint
:
3443 case bp_longjmp_resume
:
3444 case bp_step_resume
:
3445 case bp_through_sigtramp
:
3446 case bp_watchpoint_scope
:
3448 case bp_shlib_event
:
3449 case bp_thread_event
:
3450 case bp_overlay_event
:
3454 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
3457 *last_addr
= b
->loc
->address
;
3460 sym
= find_pc_sect_function (b
->loc
->address
, b
->loc
->section
);
3463 ui_out_text (uiout
, "in ");
3464 ui_out_field_string (uiout
, "func",
3465 SYMBOL_PRINT_NAME (sym
));
3466 ui_out_wrap_hint (uiout
, wrap_indent
);
3467 ui_out_text (uiout
, " at ");
3469 ui_out_field_string (uiout
, "file", b
->source_file
);
3470 ui_out_text (uiout
, ":");
3471 ui_out_field_int (uiout
, "line", b
->line_number
);
3475 print_address_symbolic (b
->loc
->address
, stb
->stream
, demangle
, "");
3476 ui_out_field_stream (uiout
, "at", stb
);
3481 if (b
->thread
!= -1)
3483 /* FIXME: This seems to be redundant and lost here; see the
3484 "stop only in" line a little further down. */
3485 ui_out_text (uiout
, " thread ");
3486 ui_out_field_int (uiout
, "thread", b
->thread
);
3489 ui_out_text (uiout
, "\n");
3491 if (frame_id_p (b
->frame_id
))
3494 ui_out_text (uiout
, "\tstop only in stack frame at ");
3495 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3497 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3498 ui_out_text (uiout
, "\n");
3504 ui_out_text (uiout
, "\tstop only if ");
3505 print_expression (b
->cond
, stb
->stream
);
3506 ui_out_field_stream (uiout
, "cond", stb
);
3507 ui_out_text (uiout
, "\n");
3510 if (b
->thread
!= -1)
3512 /* FIXME should make an annotation for this */
3513 ui_out_text (uiout
, "\tstop only in thread ");
3514 ui_out_field_int (uiout
, "thread", b
->thread
);
3515 ui_out_text (uiout
, "\n");
3518 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3520 /* FIXME should make an annotation for this */
3521 if (ep_is_catchpoint (b
))
3522 ui_out_text (uiout
, "\tcatchpoint");
3524 ui_out_text (uiout
, "\tbreakpoint");
3525 ui_out_text (uiout
, " already hit ");
3526 ui_out_field_int (uiout
, "times", b
->hit_count
);
3527 if (b
->hit_count
== 1)
3528 ui_out_text (uiout
, " time\n");
3530 ui_out_text (uiout
, " times\n");
3533 /* Output the count also if it is zero, but only if this is
3534 mi. FIXME: Should have a better test for this. */
3535 if (ui_out_is_mi_like_p (uiout
))
3536 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3537 ui_out_field_int (uiout
, "times", b
->hit_count
);
3539 if (b
->ignore_count
)
3542 ui_out_text (uiout
, "\tignore next ");
3543 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3544 ui_out_text (uiout
, " hits\n");
3547 if ((l
= b
->commands
))
3549 struct cleanup
*script_chain
;
3552 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3553 print_command_lines (uiout
, l
, 4);
3554 do_cleanups (script_chain
);
3556 do_cleanups (bkpt_chain
);
3557 do_cleanups (old_chain
);
3560 struct captured_breakpoint_query_args
3566 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3568 struct captured_breakpoint_query_args
*args
= data
;
3569 struct breakpoint
*b
;
3570 CORE_ADDR dummy_addr
= 0;
3573 if (args
->bnum
== b
->number
)
3575 print_one_breakpoint (b
, &dummy_addr
);
3583 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
)
3585 struct captured_breakpoint_query_args args
;
3587 /* For the moment we don't trust print_one_breakpoint() to not throw
3589 return catch_exceptions (uiout
, do_captured_breakpoint_query
, &args
,
3590 NULL
, RETURN_MASK_ALL
);
3593 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3594 catchpoints, et.al.). */
3597 user_settable_breakpoint (const struct breakpoint
*b
)
3599 return (b
->type
== bp_breakpoint
3600 || b
->type
== bp_catch_load
3601 || b
->type
== bp_catch_unload
3602 || b
->type
== bp_catch_fork
3603 || b
->type
== bp_catch_vfork
3604 || b
->type
== bp_catch_exec
3605 || b
->type
== bp_catch_catch
3606 || b
->type
== bp_catch_throw
3607 || b
->type
== bp_hardware_breakpoint
3608 || b
->type
== bp_watchpoint
3609 || b
->type
== bp_read_watchpoint
3610 || b
->type
== bp_access_watchpoint
3611 || b
->type
== bp_hardware_watchpoint
);
3614 /* Print information on user settable breakpoint (watchpoint, etc)
3615 number BNUM. If BNUM is -1 print all user settable breakpoints.
3616 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3619 breakpoint_1 (int bnum
, int allflag
)
3621 struct breakpoint
*b
;
3622 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3623 int nr_printable_breakpoints
;
3624 struct cleanup
*bkpttbl_chain
;
3626 /* Compute the number of rows in the table. */
3627 nr_printable_breakpoints
= 0;
3630 || bnum
== b
->number
)
3632 if (allflag
|| user_settable_breakpoint (b
))
3633 nr_printable_breakpoints
++;
3638 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3642 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3645 if (nr_printable_breakpoints
> 0)
3646 annotate_breakpoints_headers ();
3647 if (nr_printable_breakpoints
> 0)
3649 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3650 if (nr_printable_breakpoints
> 0)
3652 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3653 if (nr_printable_breakpoints
> 0)
3655 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3656 if (nr_printable_breakpoints
> 0)
3658 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3661 if (nr_printable_breakpoints
> 0)
3663 if (TARGET_ADDR_BIT
<= 32)
3664 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3666 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3668 if (nr_printable_breakpoints
> 0)
3670 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3671 ui_out_table_body (uiout
);
3672 if (nr_printable_breakpoints
> 0)
3673 annotate_breakpoints_table ();
3677 || bnum
== b
->number
)
3679 /* We only print out user settable breakpoints unless the
3681 if (allflag
|| user_settable_breakpoint (b
))
3682 print_one_breakpoint (b
, &last_addr
);
3685 do_cleanups (bkpttbl_chain
);
3687 if (nr_printable_breakpoints
== 0)
3690 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3692 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3697 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3698 that a comparison of an unsigned with -1 is always false. */
3699 if (last_addr
!= (CORE_ADDR
) -1)
3700 set_next_address (last_addr
);
3703 /* FIXME? Should this be moved up so that it is only called when
3704 there have been breakpoints? */
3705 annotate_breakpoints_table_end ();
3709 breakpoints_info (char *bnum_exp
, int from_tty
)
3714 bnum
= parse_and_eval_long (bnum_exp
);
3716 breakpoint_1 (bnum
, 0);
3720 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3725 bnum
= parse_and_eval_long (bnum_exp
);
3727 breakpoint_1 (bnum
, 1);
3730 /* Print a message describing any breakpoints set at PC. */
3733 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
)
3736 struct breakpoint
*b
;
3739 if (b
->loc
->address
== pc
) /* address match / overlay match */
3740 if (!overlay_debugging
|| b
->loc
->section
== section
)
3744 printf_filtered ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
3746 if (b
->loc
->address
== pc
) /* address match / overlay match */
3747 if (!overlay_debugging
|| b
->loc
->section
== section
)
3750 printf_filtered ("%d%s%s ",
3752 ((b
->enable_state
== bp_disabled
||
3753 b
->enable_state
== bp_shlib_disabled
||
3754 b
->enable_state
== bp_call_disabled
)
3756 : b
->enable_state
== bp_permanent
3760 : ((others
== 1) ? " and" : ""));
3762 printf_filtered ("also set at pc ");
3763 print_address_numeric (pc
, 1, gdb_stdout
);
3764 printf_filtered (".\n");
3768 /* Set the default place to put a breakpoint
3769 for the `break' command with no arguments. */
3772 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3775 default_breakpoint_valid
= valid
;
3776 default_breakpoint_address
= addr
;
3777 default_breakpoint_symtab
= symtab
;
3778 default_breakpoint_line
= line
;
3781 /* Return true iff it is meaningful to use the address member of
3782 BPT. For some breakpoint types, the address member is irrelevant
3783 and it makes no sense to attempt to compare it to other addresses
3784 (or use it for any other purpose either).
3786 More specifically, each of the following breakpoint types will always
3787 have a zero valued address and we don't want check_duplicates() to mark
3788 breakpoints of any of these types to be a duplicate of an actual
3789 breakpoint at address zero:
3792 bp_hardware_watchpoint
3794 bp_access_watchpoint
3801 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3803 enum bptype type
= bpt
->type
;
3805 return (type
!= bp_watchpoint
3806 && type
!= bp_hardware_watchpoint
3807 && type
!= bp_read_watchpoint
3808 && type
!= bp_access_watchpoint
3809 && type
!= bp_catch_exec
3810 && type
!= bp_longjmp_resume
3811 && type
!= bp_catch_fork
3812 && type
!= bp_catch_vfork
);
3815 /* Rescan breakpoints at the same address and section as BPT,
3816 marking the first one as "first" and any others as "duplicates".
3817 This is so that the bpt instruction is only inserted once.
3818 If we have a permanent breakpoint at the same place as BPT, make
3819 that one the official one, and the rest as duplicates. */
3822 check_duplicates (struct breakpoint
*bpt
)
3824 struct bp_location
*b
;
3826 struct bp_location
*perm_bp
= 0;
3827 CORE_ADDR address
= bpt
->loc
->address
;
3828 asection
*section
= bpt
->loc
->section
;
3830 if (! breakpoint_address_is_meaningful (bpt
))
3833 ALL_BP_LOCATIONS (b
)
3834 if (b
->owner
->enable_state
!= bp_disabled
3835 && b
->owner
->enable_state
!= bp_shlib_disabled
3836 && b
->owner
->enable_state
!= bp_call_disabled
3837 && b
->address
== address
/* address / overlay match */
3838 && (!overlay_debugging
|| b
->section
== section
)
3839 && breakpoint_address_is_meaningful (b
->owner
))
3841 /* Have we found a permanent breakpoint? */
3842 if (b
->owner
->enable_state
== bp_permanent
)
3849 b
->duplicate
= count
> 1;
3852 /* If we found a permanent breakpoint at this address, go over the
3853 list again and declare all the other breakpoints there to be the
3857 perm_bp
->duplicate
= 0;
3859 /* Permanent breakpoint should always be inserted. */
3860 if (! perm_bp
->inserted
)
3861 internal_error (__FILE__
, __LINE__
,
3862 "allegedly permanent breakpoint is not "
3863 "actually inserted");
3865 ALL_BP_LOCATIONS (b
)
3868 if (b
->owner
->enable_state
!= bp_disabled
3869 && b
->owner
->enable_state
!= bp_shlib_disabled
3870 && b
->owner
->enable_state
!= bp_call_disabled
3871 && b
->address
== address
/* address / overlay match */
3872 && (!overlay_debugging
|| b
->section
== section
)
3873 && breakpoint_address_is_meaningful (b
->owner
))
3876 internal_error (__FILE__
, __LINE__
,
3877 "another breakpoint was inserted on top of "
3878 "a permanent breakpoint");
3887 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
3888 int bnum
, int have_bnum
)
3893 strcpy (astr1
, local_hex_string_custom ((unsigned long) from_addr
, "08l"));
3894 strcpy (astr2
, local_hex_string_custom ((unsigned long) to_addr
, "08l"));
3896 warning ("Breakpoint %d address previously adjusted from %s to %s.",
3897 bnum
, astr1
, astr2
);
3899 warning ("Breakpoint address adjusted from %s to %s.", astr1
, astr2
);
3902 /* Adjust a breakpoint's address to account for architectural constraints
3903 on breakpoint placement. Return the adjusted address. Note: Very
3904 few targets require this kind of adjustment. For most targets,
3905 this function is simply the identity function. */
3908 adjust_breakpoint_address (CORE_ADDR bpaddr
)
3910 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
3912 /* Very few targets need any kind of breakpoint adjustment. */
3917 CORE_ADDR adjusted_bpaddr
;
3919 /* Some targets have architectural constraints on the placement
3920 of breakpoint instructions. Obtain the adjusted address. */
3921 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
3924 /* An adjusted breakpoint address can significantly alter
3925 a user's expectations. Print a warning if an adjustment
3927 if (adjusted_bpaddr
!= bpaddr
)
3928 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
3930 return adjusted_bpaddr
;
3934 /* Allocate a struct bp_location. */
3936 static struct bp_location
*
3937 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
)
3939 struct bp_location
*loc
, *loc_p
;
3941 loc
= xmalloc (sizeof (struct bp_location
));
3942 memset (loc
, 0, sizeof (*loc
));
3952 case bp_longjmp_resume
:
3953 case bp_step_resume
:
3954 case bp_through_sigtramp
:
3955 case bp_watchpoint_scope
:
3957 case bp_shlib_event
:
3958 case bp_thread_event
:
3959 case bp_overlay_event
:
3961 case bp_catch_unload
:
3962 loc
->loc_type
= bp_loc_software_breakpoint
;
3964 case bp_hardware_breakpoint
:
3965 loc
->loc_type
= bp_loc_hardware_breakpoint
;
3967 case bp_hardware_watchpoint
:
3968 case bp_read_watchpoint
:
3969 case bp_access_watchpoint
:
3970 loc
->loc_type
= bp_loc_hardware_watchpoint
;
3974 case bp_catch_vfork
:
3976 case bp_catch_catch
:
3977 case bp_catch_throw
:
3978 loc
->loc_type
= bp_loc_other
;
3981 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
3984 /* Add this breakpoint to the end of the chain. */
3986 loc_p
= bp_location_chain
;
3988 bp_location_chain
= loc
;
3992 loc_p
= loc_p
->next
;
3999 /* set_raw_breakpoint() is a low level routine for allocating and
4000 partially initializing a breakpoint of type BPTYPE. The newly
4001 created breakpoint's address, section, source file name, and line
4002 number are provided by SAL. The newly created and partially
4003 initialized breakpoint is added to the breakpoint chain and
4004 is also returned as the value of this function.
4006 It is expected that the caller will complete the initialization of
4007 the newly created breakpoint struct as well as output any status
4008 information regarding the creation of a new breakpoint. In
4009 particular, set_raw_breakpoint() does NOT set the breakpoint
4010 number! Care should be taken to not allow an error() to occur
4011 prior to completing the initialization of the breakpoint. If this
4012 should happen, a bogus breakpoint will be left on the chain. */
4015 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4017 struct breakpoint
*b
, *b1
;
4019 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4020 memset (b
, 0, sizeof (*b
));
4021 b
->loc
= allocate_bp_location (b
, bptype
);
4022 b
->loc
->requested_address
= sal
.pc
;
4023 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
);
4024 if (sal
.symtab
== NULL
)
4025 b
->source_file
= NULL
;
4027 b
->source_file
= savestring (sal
.symtab
->filename
,
4028 strlen (sal
.symtab
->filename
));
4029 b
->loc
->section
= sal
.section
;
4031 b
->language
= current_language
->la_language
;
4032 b
->input_radix
= input_radix
;
4034 b
->line_number
= sal
.line
;
4035 b
->enable_state
= bp_enabled
;
4038 b
->ignore_count
= 0;
4040 b
->frame_id
= null_frame_id
;
4041 b
->dll_pathname
= NULL
;
4042 b
->triggered_dll_pathname
= NULL
;
4043 b
->forked_inferior_pid
= 0;
4044 b
->exec_pathname
= NULL
;
4047 /* Add this breakpoint to the end of the chain
4048 so that a list of breakpoints will come out in order
4049 of increasing numbers. */
4051 b1
= breakpoint_chain
;
4053 breakpoint_chain
= b
;
4061 check_duplicates (b
);
4062 breakpoints_changed ();
4068 /* Note that the breakpoint object B describes a permanent breakpoint
4069 instruction, hard-wired into the inferior's code. */
4071 make_breakpoint_permanent (struct breakpoint
*b
)
4073 b
->enable_state
= bp_permanent
;
4075 /* By definition, permanent breakpoints are already present in the code. */
4076 b
->loc
->inserted
= 1;
4079 static struct breakpoint
*
4080 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4082 static int internal_breakpoint_number
= -1;
4083 struct symtab_and_line sal
;
4084 struct breakpoint
*b
;
4086 init_sal (&sal
); /* initialize to zeroes */
4089 sal
.section
= find_pc_overlay (sal
.pc
);
4091 b
= set_raw_breakpoint (sal
, type
);
4092 b
->number
= internal_breakpoint_number
--;
4093 b
->disposition
= disp_donttouch
;
4100 create_longjmp_breakpoint (char *func_name
)
4102 struct breakpoint
*b
;
4103 struct minimal_symbol
*m
;
4105 if (func_name
== NULL
)
4106 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
4109 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4112 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4115 b
->enable_state
= bp_disabled
;
4118 b
->addr_string
= xstrdup (func_name
);
4121 /* Call this routine when stepping and nexting to enable a breakpoint
4122 if we do a longjmp(). When we hit that breakpoint, call
4123 set_longjmp_resume_breakpoint() to figure out where we are going. */
4126 enable_longjmp_breakpoint (void)
4128 struct breakpoint
*b
;
4131 if (b
->type
== bp_longjmp
)
4133 b
->enable_state
= bp_enabled
;
4134 check_duplicates (b
);
4139 disable_longjmp_breakpoint (void)
4141 struct breakpoint
*b
;
4144 if (b
->type
== bp_longjmp
4145 || b
->type
== bp_longjmp_resume
)
4147 b
->enable_state
= bp_disabled
;
4148 check_duplicates (b
);
4153 create_overlay_event_breakpoint (char *func_name
)
4155 struct breakpoint
*b
;
4156 struct minimal_symbol
*m
;
4158 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4161 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4163 b
->addr_string
= xstrdup (func_name
);
4165 if (overlay_debugging
== ovly_auto
)
4167 b
->enable_state
= bp_enabled
;
4168 overlay_events_enabled
= 1;
4172 b
->enable_state
= bp_disabled
;
4173 overlay_events_enabled
= 0;
4178 enable_overlay_breakpoints (void)
4180 struct breakpoint
*b
;
4183 if (b
->type
== bp_overlay_event
)
4185 b
->enable_state
= bp_enabled
;
4186 check_duplicates (b
);
4187 overlay_events_enabled
= 1;
4192 disable_overlay_breakpoints (void)
4194 struct breakpoint
*b
;
4197 if (b
->type
== bp_overlay_event
)
4199 b
->enable_state
= bp_disabled
;
4200 check_duplicates (b
);
4201 overlay_events_enabled
= 0;
4206 create_thread_event_breakpoint (CORE_ADDR address
)
4208 struct breakpoint
*b
;
4210 b
= create_internal_breakpoint (address
, bp_thread_event
);
4212 b
->enable_state
= bp_enabled
;
4213 /* addr_string has to be used or breakpoint_re_set will delete me. */
4214 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->loc
->address
));
4220 remove_thread_event_breakpoints (void)
4222 struct breakpoint
*b
, *temp
;
4224 ALL_BREAKPOINTS_SAFE (b
, temp
)
4225 if (b
->type
== bp_thread_event
)
4226 delete_breakpoint (b
);
4231 remove_solib_event_breakpoints (void)
4233 struct breakpoint
*b
, *temp
;
4235 ALL_BREAKPOINTS_SAFE (b
, temp
)
4236 if (b
->type
== bp_shlib_event
)
4237 delete_breakpoint (b
);
4241 create_solib_event_breakpoint (CORE_ADDR address
)
4243 struct breakpoint
*b
;
4245 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4249 /* Disable any breakpoints that are on code in shared libraries. Only
4250 apply to enabled breakpoints, disabled ones can just stay disabled. */
4253 disable_breakpoints_in_shlibs (int silent
)
4255 struct breakpoint
*b
;
4256 int disabled_shlib_breaks
= 0;
4258 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4261 #if defined (PC_SOLIB)
4262 if (((b
->type
== bp_breakpoint
) ||
4263 (b
->type
== bp_hardware_breakpoint
)) &&
4264 breakpoint_enabled (b
) &&
4265 !b
->loc
->duplicate
&&
4266 PC_SOLIB (b
->loc
->address
))
4268 b
->enable_state
= bp_shlib_disabled
;
4271 if (!disabled_shlib_breaks
)
4273 target_terminal_ours_for_output ();
4274 warning ("Temporarily disabling shared library breakpoints:");
4276 disabled_shlib_breaks
= 1;
4277 warning ("breakpoint #%d ", b
->number
);
4284 /* Try to reenable any breakpoints in shared libraries. */
4286 re_enable_breakpoints_in_shlibs (void)
4288 struct breakpoint
*b
;
4291 if (b
->enable_state
== bp_shlib_disabled
)
4295 /* Do not reenable the breakpoint if the shared library
4296 is still not mapped in. */
4297 lib
= PC_SOLIB (b
->loc
->address
);
4298 if (lib
!= NULL
&& target_read_memory (b
->loc
->address
, buf
, 1) == 0)
4299 b
->enable_state
= bp_enabled
;
4306 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
4307 char *cond_string
, enum bptype bp_kind
)
4309 struct breakpoint
*b
;
4310 struct symtabs_and_lines sals
;
4311 struct cleanup
*old_chain
;
4312 struct cleanup
*canonical_strings_chain
= NULL
;
4313 char *addr_start
= hookname
;
4314 char *addr_end
= NULL
;
4315 char **canonical
= (char **) NULL
;
4316 int thread
= -1; /* All threads. */
4318 /* Set a breakpoint on the specified hook. */
4319 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
, 0, &canonical
, NULL
);
4320 addr_end
= hookname
;
4322 if (sals
.nelts
== 0)
4324 warning ("Unable to set a breakpoint on dynamic linker callback.");
4325 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4326 warning ("GDB will be unable to track shl_load/shl_unload calls");
4329 if (sals
.nelts
!= 1)
4331 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4332 warning ("GDB will be unable to track shl_load/shl_unload calls");
4336 /* Make sure that all storage allocated in decode_line_1 gets freed
4337 in case the following errors out. */
4338 old_chain
= make_cleanup (xfree
, sals
.sals
);
4339 if (canonical
!= (char **) NULL
)
4341 make_cleanup (xfree
, canonical
);
4342 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
4343 if (canonical
[0] != NULL
)
4344 make_cleanup (xfree
, canonical
[0]);
4347 resolve_sal_pc (&sals
.sals
[0]);
4349 /* Remove the canonical strings from the cleanup, they are needed below. */
4350 if (canonical
!= (char **) NULL
)
4351 discard_cleanups (canonical_strings_chain
);
4353 b
= set_raw_breakpoint (sals
.sals
[0], bp_kind
);
4354 set_breakpoint_count (breakpoint_count
+ 1);
4355 b
->number
= breakpoint_count
;
4357 b
->cond_string
= (cond_string
== NULL
) ?
4358 NULL
: savestring (cond_string
, strlen (cond_string
));
4361 if (canonical
!= (char **) NULL
&& canonical
[0] != NULL
)
4362 b
->addr_string
= canonical
[0];
4363 else if (addr_start
)
4364 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
4366 b
->enable_state
= bp_enabled
;
4367 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4369 if (dll_pathname
== NULL
)
4370 b
->dll_pathname
= NULL
;
4373 b
->dll_pathname
= (char *) xmalloc (strlen (dll_pathname
) + 1);
4374 strcpy (b
->dll_pathname
, dll_pathname
);
4378 do_cleanups (old_chain
);
4382 create_solib_load_event_breakpoint (char *hookname
, int tempflag
,
4383 char *dll_pathname
, char *cond_string
)
4385 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4386 cond_string
, bp_catch_load
);
4390 create_solib_unload_event_breakpoint (char *hookname
, int tempflag
,
4391 char *dll_pathname
, char *cond_string
)
4393 solib_load_unload_1 (hookname
,tempflag
, dll_pathname
,
4394 cond_string
, bp_catch_unload
);
4398 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4399 enum bptype bp_kind
)
4401 struct symtab_and_line sal
;
4402 struct breakpoint
*b
;
4403 int thread
= -1; /* All threads. */
4410 b
= set_raw_breakpoint (sal
, bp_kind
);
4411 set_breakpoint_count (breakpoint_count
+ 1);
4412 b
->number
= breakpoint_count
;
4414 b
->cond_string
= (cond_string
== NULL
) ?
4415 NULL
: savestring (cond_string
, strlen (cond_string
));
4417 b
->addr_string
= NULL
;
4418 b
->enable_state
= bp_enabled
;
4419 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4420 b
->forked_inferior_pid
= 0;
4426 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4428 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4432 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4434 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4438 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4440 struct symtab_and_line sal
;
4441 struct breakpoint
*b
;
4442 int thread
= -1; /* All threads. */
4449 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4450 set_breakpoint_count (breakpoint_count
+ 1);
4451 b
->number
= breakpoint_count
;
4453 b
->cond_string
= (cond_string
== NULL
) ?
4454 NULL
: savestring (cond_string
, strlen (cond_string
));
4456 b
->addr_string
= NULL
;
4457 b
->enable_state
= bp_enabled
;
4458 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4464 hw_breakpoint_used_count (void)
4466 struct breakpoint
*b
;
4471 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4479 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4481 struct breakpoint
*b
;
4484 *other_type_used
= 0;
4487 if (breakpoint_enabled (b
))
4489 if (b
->type
== type
)
4491 else if ((b
->type
== bp_hardware_watchpoint
||
4492 b
->type
== bp_read_watchpoint
||
4493 b
->type
== bp_access_watchpoint
))
4494 *other_type_used
= 1;
4500 /* Call this after hitting the longjmp() breakpoint. Use this to set
4501 a new breakpoint at the target of the jmp_buf.
4503 FIXME - This ought to be done by setting a temporary breakpoint
4504 that gets deleted automatically... */
4507 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_id frame_id
)
4509 struct breakpoint
*b
;
4512 if (b
->type
== bp_longjmp_resume
)
4514 b
->loc
->requested_address
= pc
;
4515 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
);
4516 b
->enable_state
= bp_enabled
;
4517 b
->frame_id
= frame_id
;
4518 check_duplicates (b
);
4524 disable_watchpoints_before_interactive_call_start (void)
4526 struct breakpoint
*b
;
4530 if (((b
->type
== bp_watchpoint
)
4531 || (b
->type
== bp_hardware_watchpoint
)
4532 || (b
->type
== bp_read_watchpoint
)
4533 || (b
->type
== bp_access_watchpoint
)
4534 || ep_is_exception_catchpoint (b
))
4535 && breakpoint_enabled (b
))
4537 b
->enable_state
= bp_call_disabled
;
4538 check_duplicates (b
);
4544 enable_watchpoints_after_interactive_call_stop (void)
4546 struct breakpoint
*b
;
4550 if (((b
->type
== bp_watchpoint
)
4551 || (b
->type
== bp_hardware_watchpoint
)
4552 || (b
->type
== bp_read_watchpoint
)
4553 || (b
->type
== bp_access_watchpoint
)
4554 || ep_is_exception_catchpoint (b
))
4555 && (b
->enable_state
== bp_call_disabled
))
4557 b
->enable_state
= bp_enabled
;
4558 check_duplicates (b
);
4564 /* Set a breakpoint that will evaporate an end of command
4565 at address specified by SAL.
4566 Restrict it to frame FRAME if FRAME is nonzero. */
4569 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4572 struct breakpoint
*b
;
4573 b
= set_raw_breakpoint (sal
, type
);
4574 b
->enable_state
= bp_enabled
;
4575 b
->disposition
= disp_donttouch
;
4576 b
->frame_id
= frame_id
;
4578 /* If we're debugging a multi-threaded program, then we
4579 want momentary breakpoints to be active in only a
4580 single thread of control. */
4581 if (in_thread_list (inferior_ptid
))
4582 b
->thread
= pid_to_thread_id (inferior_ptid
);
4588 /* Tell the user we have just set a breakpoint B. */
4591 mention (struct breakpoint
*b
)
4594 struct cleanup
*old_chain
, *ui_out_chain
;
4595 struct ui_stream
*stb
;
4597 stb
= ui_out_stream_new (uiout
);
4598 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4600 /* FIXME: This is misplaced; mention() is called by things (like hitting a
4601 watchpoint) other than breakpoint creation. It should be possible to
4602 clean this up and at the same time replace the random calls to
4603 breakpoint_changed with this hook, as has already been done for
4604 delete_breakpoint_hook and so on. */
4605 if (create_breakpoint_hook
)
4606 create_breakpoint_hook (b
);
4607 breakpoint_create_event (b
->number
);
4609 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4610 b
->ops
->print_mention (b
);
4615 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b
->number
);
4618 ui_out_text (uiout
, "Watchpoint ");
4619 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4620 ui_out_field_int (uiout
, "number", b
->number
);
4621 ui_out_text (uiout
, ": ");
4622 print_expression (b
->exp
, stb
->stream
);
4623 ui_out_field_stream (uiout
, "exp", stb
);
4624 do_cleanups (ui_out_chain
);
4626 case bp_hardware_watchpoint
:
4627 ui_out_text (uiout
, "Hardware watchpoint ");
4628 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4629 ui_out_field_int (uiout
, "number", b
->number
);
4630 ui_out_text (uiout
, ": ");
4631 print_expression (b
->exp
, stb
->stream
);
4632 ui_out_field_stream (uiout
, "exp", stb
);
4633 do_cleanups (ui_out_chain
);
4635 case bp_read_watchpoint
:
4636 ui_out_text (uiout
, "Hardware read watchpoint ");
4637 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4638 ui_out_field_int (uiout
, "number", b
->number
);
4639 ui_out_text (uiout
, ": ");
4640 print_expression (b
->exp
, stb
->stream
);
4641 ui_out_field_stream (uiout
, "exp", stb
);
4642 do_cleanups (ui_out_chain
);
4644 case bp_access_watchpoint
:
4645 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4646 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4647 ui_out_field_int (uiout
, "number", b
->number
);
4648 ui_out_text (uiout
, ": ");
4649 print_expression (b
->exp
, stb
->stream
);
4650 ui_out_field_stream (uiout
, "exp", stb
);
4651 do_cleanups (ui_out_chain
);
4654 if (ui_out_is_mi_like_p (uiout
))
4659 printf_filtered ("Breakpoint %d", b
->number
);
4662 case bp_hardware_breakpoint
:
4663 if (ui_out_is_mi_like_p (uiout
))
4668 printf_filtered ("Hardware assisted breakpoint %d", b
->number
);
4672 case bp_catch_unload
:
4673 printf_filtered ("Catchpoint %d (%s %s)",
4675 (b
->type
== bp_catch_load
) ? "load" : "unload",
4676 (b
->dll_pathname
!= NULL
) ?
4677 b
->dll_pathname
: "<any library>");
4680 case bp_catch_vfork
:
4681 printf_filtered ("Catchpoint %d (%s)",
4683 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4686 printf_filtered ("Catchpoint %d (exec)",
4689 case bp_catch_catch
:
4690 case bp_catch_throw
:
4691 printf_filtered ("Catchpoint %d (%s)",
4693 (b
->type
== bp_catch_catch
) ? "catch" : "throw");
4699 case bp_longjmp_resume
:
4700 case bp_step_resume
:
4701 case bp_through_sigtramp
:
4703 case bp_watchpoint_scope
:
4704 case bp_shlib_event
:
4705 case bp_thread_event
:
4706 case bp_overlay_event
:
4712 if (addressprint
|| b
->source_file
== NULL
)
4714 printf_filtered (" at ");
4715 print_address_numeric (b
->loc
->address
, 1, gdb_stdout
);
4718 printf_filtered (": file %s, line %d.",
4719 b
->source_file
, b
->line_number
);
4721 do_cleanups (old_chain
);
4722 if (ui_out_is_mi_like_p (uiout
))
4724 printf_filtered ("\n");
4728 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4729 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4730 COND[i] and COND_STRING[i] values.
4732 NOTE: If the function succeeds, the caller is expected to cleanup
4733 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4734 array contents). If the function fails (error() is called), the
4735 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4736 COND and SALS arrays and each of those arrays contents. */
4739 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
4740 struct expression
**cond
, char **cond_string
,
4741 enum bptype type
, enum bpdisp disposition
,
4742 int thread
, int ignore_count
, int from_tty
)
4744 if (type
== bp_hardware_breakpoint
)
4746 int i
= hw_breakpoint_used_count ();
4747 int target_resources_ok
=
4748 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
4750 if (target_resources_ok
== 0)
4751 error ("No hardware breakpoint support in the target.");
4752 else if (target_resources_ok
< 0)
4753 error ("Hardware breakpoints used exceeds limit.");
4756 /* Now set all the breakpoints. */
4759 for (i
= 0; i
< sals
.nelts
; i
++)
4761 struct breakpoint
*b
;
4762 struct symtab_and_line sal
= sals
.sals
[i
];
4765 describe_other_breakpoints (sal
.pc
, sal
.section
);
4767 b
= set_raw_breakpoint (sal
, type
);
4768 set_breakpoint_count (breakpoint_count
+ 1);
4769 b
->number
= breakpoint_count
;
4773 b
->addr_string
= addr_string
[i
];
4775 /* addr_string has to be used or breakpoint_re_set will delete
4777 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->loc
->address
));
4778 b
->cond_string
= cond_string
[i
];
4779 b
->ignore_count
= ignore_count
;
4780 b
->enable_state
= bp_enabled
;
4781 b
->disposition
= disposition
;
4787 /* Parse ARG which is assumed to be a SAL specification possibly
4788 followed by conditionals. On return, SALS contains an array of SAL
4789 addresses found. ADDR_STRING contains a vector of (canonical)
4790 address strings. ARG points to the end of the SAL. */
4793 parse_breakpoint_sals (char **address
,
4794 struct symtabs_and_lines
*sals
,
4795 char ***addr_string
)
4797 char *addr_start
= *address
;
4798 *addr_string
= NULL
;
4799 /* If no arg given, or if first arg is 'if ', use the default
4801 if ((*address
) == NULL
4802 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
4804 if (default_breakpoint_valid
)
4806 struct symtab_and_line sal
;
4807 init_sal (&sal
); /* initialize to zeroes */
4808 sals
->sals
= (struct symtab_and_line
*)
4809 xmalloc (sizeof (struct symtab_and_line
));
4810 sal
.pc
= default_breakpoint_address
;
4811 sal
.line
= default_breakpoint_line
;
4812 sal
.symtab
= default_breakpoint_symtab
;
4813 sal
.section
= find_pc_overlay (sal
.pc
);
4814 sals
->sals
[0] = sal
;
4818 error ("No default breakpoint address now.");
4822 /* Force almost all breakpoints to be in terms of the
4823 current_source_symtab (which is decode_line_1's default). This
4824 should produce the results we want almost all of the time while
4825 leaving default_breakpoint_* alone.
4826 ObjC: However, don't match an Objective-C method name which
4827 may have a '+' or '-' succeeded by a '[' */
4829 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
4831 if (default_breakpoint_valid
4833 || ((strchr ("+-", (*address
)[0]) != NULL
)
4834 && ((*address
)[1] != '['))))
4835 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
4836 default_breakpoint_line
, addr_string
, NULL
);
4838 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0, addr_string
, NULL
);
4840 /* For any SAL that didn't have a canonical string, fill one in. */
4841 if (sals
->nelts
> 0 && *addr_string
== NULL
)
4842 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
4843 if (addr_start
!= (*address
))
4846 for (i
= 0; i
< sals
->nelts
; i
++)
4848 /* Add the string if not present. */
4849 if ((*addr_string
)[i
] == NULL
)
4850 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
4856 /* Convert each SAL into a real PC. Verify that the PC can be
4857 inserted as a breakpoint. If it can't throw an error. */
4860 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
4864 for (i
= 0; i
< sals
->nelts
; i
++)
4866 resolve_sal_pc (&sals
->sals
[i
]);
4868 /* It's possible for the PC to be nonzero, but still an illegal
4869 value on some targets.
4871 For example, on HP-UX if you start gdb, and before running the
4872 inferior you try to set a breakpoint on a shared library function
4873 "foo" where the inferior doesn't call "foo" directly but does
4874 pass its address to another function call, then we do find a
4875 minimal symbol for the "foo", but it's address is invalid.
4876 (Appears to be an index into a table that the loader sets up
4877 when the inferior is run.)
4879 Give the target a chance to bless sals.sals[i].pc before we
4880 try to make a breakpoint for it. */
4881 if (PC_REQUIRES_RUN_BEFORE_USE (sals
->sals
[i
].pc
))
4883 if (address
== NULL
)
4884 error ("Cannot break without a running program.");
4886 error ("Cannot break on %s without a running program.",
4892 /* Set a breakpoint according to ARG (function, linenum or *address)
4893 flag: first bit : 0 non-temporary, 1 temporary.
4894 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
4897 break_command_1 (char *arg
, int flag
, int from_tty
)
4899 int tempflag
, hardwareflag
;
4900 struct symtabs_and_lines sals
;
4901 struct expression
**cond
= 0;
4902 /* Pointers in arg to the start, and one past the end, of the
4904 char **cond_string
= (char **) NULL
;
4905 char *addr_start
= arg
;
4907 struct cleanup
*old_chain
;
4908 struct cleanup
*breakpoint_chain
= NULL
;
4911 int ignore_count
= 0;
4913 hardwareflag
= flag
& BP_HARDWAREFLAG
;
4914 tempflag
= flag
& BP_TEMPFLAG
;
4919 parse_breakpoint_sals (&arg
, &sals
, &addr_string
);
4924 /* Create a chain of things that always need to be cleaned up. */
4925 old_chain
= make_cleanup (null_cleanup
, 0);
4927 /* Make sure that all storage allocated to SALS gets freed. */
4928 make_cleanup (xfree
, sals
.sals
);
4930 /* Cleanup the addr_string array but not its contents. */
4931 make_cleanup (xfree
, addr_string
);
4933 /* Allocate space for all the cond expressions. */
4934 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
4935 make_cleanup (xfree
, cond
);
4937 /* Allocate space for all the cond strings. */
4938 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
4939 make_cleanup (xfree
, cond_string
);
4941 /* ----------------------------- SNIP -----------------------------
4942 Anything added to the cleanup chain beyond this point is assumed
4943 to be part of a breakpoint. If the breakpoint create succeeds
4944 then the memory is not reclaimed. */
4945 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
4947 /* Mark the contents of the addr_string for cleanup. These go on
4948 the breakpoint_chain and only occure if the breakpoint create
4950 for (i
= 0; i
< sals
.nelts
; i
++)
4952 if (addr_string
[i
] != NULL
)
4953 make_cleanup (xfree
, addr_string
[i
]);
4956 /* Resolve all line numbers to PC's and verify that the addresses
4957 are ok for the target. */
4958 breakpoint_sals_to_pc (&sals
, addr_start
);
4960 /* Verify that condition can be parsed, before setting any
4961 breakpoints. Allocate a separate condition expression for each
4963 thread
= -1; /* No specific thread yet */
4964 for (i
= 0; i
< sals
.nelts
; i
++)
4971 char *cond_start
= NULL
;
4972 char *cond_end
= NULL
;
4973 while (*tok
== ' ' || *tok
== '\t')
4978 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
4981 toklen
= end_tok
- tok
;
4983 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
4985 tok
= cond_start
= end_tok
+ 1;
4986 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
4987 make_cleanup (xfree
, cond
[i
]);
4989 cond_string
[i
] = savestring (cond_start
, cond_end
- cond_start
);
4990 make_cleanup (xfree
, cond_string
[i
]);
4992 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
4998 thread
= strtol (tok
, &tok
, 0);
5000 error ("Junk after thread keyword.");
5001 if (!valid_thread_id (thread
))
5002 error ("Unknown thread %d\n", thread
);
5005 error ("Junk at end of arguments.");
5009 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5010 hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
5011 tempflag
? disp_del
: disp_donttouch
,
5012 thread
, ignore_count
, from_tty
);
5016 warning ("Multiple breakpoints were set.");
5017 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5019 /* That's it. Discard the cleanups for data inserted into the
5021 discard_cleanups (breakpoint_chain
);
5022 /* But cleanup everything else. */
5023 do_cleanups (old_chain
);
5026 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
5027 linenum or *address) with COND and IGNORE_COUNT. */
5029 struct captured_breakpoint_args
5040 do_captured_breakpoint (void *data
)
5042 struct captured_breakpoint_args
*args
= data
;
5043 struct symtabs_and_lines sals
;
5044 struct expression
**cond
;
5045 struct cleanup
*old_chain
;
5046 struct cleanup
*breakpoint_chain
= NULL
;
5053 /* Parse the source and lines spec. Delay check that the expression
5054 didn't contain trailing garbage until after cleanups are in
5058 address_end
= args
->address
;
5060 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
);
5065 /* Create a chain of things at always need to be cleaned up. */
5066 old_chain
= make_cleanup (null_cleanup
, 0);
5068 /* Always have a addr_string array, even if it is empty. */
5069 make_cleanup (xfree
, addr_string
);
5071 /* Make sure that all storage allocated to SALS gets freed. */
5072 make_cleanup (xfree
, sals
.sals
);
5074 /* Allocate space for all the cond expressions. */
5075 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5076 make_cleanup (xfree
, cond
);
5078 /* Allocate space for all the cond strings. */
5079 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5080 make_cleanup (xfree
, cond_string
);
5082 /* ----------------------------- SNIP -----------------------------
5083 Anything added to the cleanup chain beyond this point is assumed
5084 to be part of a breakpoint. If the breakpoint create goes
5085 through then that memory is not cleaned up. */
5086 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5088 /* Mark the contents of the addr_string for cleanup. These go on
5089 the breakpoint_chain and only occure if the breakpoint create
5091 for (i
= 0; i
< sals
.nelts
; i
++)
5093 if (addr_string
[i
] != NULL
)
5094 make_cleanup (xfree
, addr_string
[i
]);
5097 /* Wait until now before checking for garbage at the end of the
5098 address. That way cleanups can take care of freeing any
5100 if (*address_end
!= '\0')
5101 error ("Garbage %s following breakpoint address", address_end
);
5103 /* Resolve all line numbers to PC's. */
5104 breakpoint_sals_to_pc (&sals
, args
->address
);
5106 /* Verify that conditions can be parsed, before setting any
5108 for (i
= 0; i
< sals
.nelts
; i
++)
5110 if (args
->condition
!= NULL
)
5112 char *tok
= args
->condition
;
5113 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
5115 error ("Garbage %s follows condition", tok
);
5116 make_cleanup (xfree
, cond
[i
]);
5117 cond_string
[i
] = xstrdup (args
->condition
);
5121 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5122 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
5123 args
->tempflag
? disp_del
: disp_donttouch
,
5124 args
->thread
, args
->ignore_count
, 0/*from-tty*/);
5126 /* That's it. Discard the cleanups for data inserted into the
5128 discard_cleanups (breakpoint_chain
);
5129 /* But cleanup everything else. */
5130 do_cleanups (old_chain
);
5135 gdb_breakpoint (char *address
, char *condition
,
5136 int hardwareflag
, int tempflag
,
5137 int thread
, int ignore_count
)
5139 struct captured_breakpoint_args args
;
5140 args
.address
= address
;
5141 args
.condition
= condition
;
5142 args
.hardwareflag
= hardwareflag
;
5143 args
.tempflag
= tempflag
;
5144 args
.thread
= thread
;
5145 args
.ignore_count
= ignore_count
;
5146 return catch_errors (do_captured_breakpoint
, &args
,
5147 NULL
, RETURN_MASK_ALL
);
5152 break_at_finish_at_depth_command_1 (char *arg
, int flag
, int from_tty
)
5154 struct frame_info
*frame
;
5155 CORE_ADDR low
, high
, selected_pc
= 0;
5156 char *extra_args
= NULL
;
5158 int extra_args_len
= 0, if_arg
= 0;
5161 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5164 if (default_breakpoint_valid
)
5166 if (deprecated_selected_frame
)
5168 selected_pc
= get_frame_pc (deprecated_selected_frame
);
5173 error ("No selected frame.");
5176 error ("No default breakpoint address now.");
5180 extra_args
= strchr (arg
, ' ');
5184 extra_args_len
= strlen (extra_args
);
5185 level_arg
= (char *) xmalloc (extra_args
- arg
);
5186 strncpy (level_arg
, arg
, extra_args
- arg
- 1);
5187 level_arg
[extra_args
- arg
- 1] = '\0';
5191 level_arg
= (char *) xmalloc (strlen (arg
) + 1);
5192 strcpy (level_arg
, arg
);
5195 frame
= parse_frame_specification (level_arg
);
5197 selected_pc
= get_frame_pc (frame
);
5204 extra_args_len
= strlen (arg
);
5209 if (find_pc_partial_function (selected_pc
, (char **) NULL
, &low
, &high
))
5213 addr_string
= xstrprintf ("*0x%s %s", paddr_nz (high
), extra_args
);
5215 addr_string
= xstrprintf ("*0x%s", paddr_nz (high
));
5216 break_command_1 (addr_string
, flag
, from_tty
);
5217 xfree (addr_string
);
5220 error ("No function contains the specified address");
5223 error ("Unable to set breakpoint at procedure exit");
5228 break_at_finish_command_1 (char *arg
, int flag
, int from_tty
)
5230 char *addr_string
, *break_string
, *beg_addr_string
;
5231 CORE_ADDR low
, high
;
5232 struct symtabs_and_lines sals
;
5233 struct symtab_and_line sal
;
5234 struct cleanup
*old_chain
;
5235 char *extra_args
= NULL
;
5236 int extra_args_len
= 0;
5240 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5242 if (default_breakpoint_valid
)
5244 if (deprecated_selected_frame
)
5246 addr_string
= xstrprintf ("*0x%s",
5247 paddr_nz (get_frame_pc (deprecated_selected_frame
)));
5252 error ("No selected frame.");
5255 error ("No default breakpoint address now.");
5259 addr_string
= (char *) xmalloc (strlen (arg
) + 1);
5260 strcpy (addr_string
, arg
);
5266 extra_args_len
= strlen (arg
);
5270 /* get the stuff after the function name or address */
5271 extra_args
= strchr (arg
, ' ');
5275 extra_args_len
= strlen (extra_args
);
5282 beg_addr_string
= addr_string
;
5283 sals
= decode_line_1 (&addr_string
, 1, (struct symtab
*) NULL
, 0,
5284 (char ***) NULL
, NULL
);
5286 xfree (beg_addr_string
);
5287 old_chain
= make_cleanup (xfree
, sals
.sals
);
5288 for (i
= 0; (i
< sals
.nelts
); i
++)
5291 if (find_pc_partial_function (sal
.pc
, (char **) NULL
, &low
, &high
))
5295 break_string
= xstrprintf ("*0x%s %s", paddr_nz (high
),
5298 break_string
= xstrprintf ("*0x%s", paddr_nz (high
));
5299 break_command_1 (break_string
, flag
, from_tty
);
5300 xfree (break_string
);
5303 error ("No function contains the specified address");
5307 warning ("Multiple breakpoints were set.\n");
5308 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5310 do_cleanups (old_chain
);
5314 /* Helper function for break_command_1 and disassemble_command. */
5317 resolve_sal_pc (struct symtab_and_line
*sal
)
5321 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5323 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5324 error ("No line %d in file \"%s\".",
5325 sal
->line
, sal
->symtab
->filename
);
5329 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5331 struct blockvector
*bv
;
5336 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &index
, sal
->symtab
);
5339 b
= BLOCKVECTOR_BLOCK (bv
, index
);
5340 sym
= block_function (b
);
5343 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5344 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5348 /* It really is worthwhile to have the section, so we'll just
5349 have to look harder. This case can be executed if we have
5350 line numbers but no functions (as can happen in assembly
5353 struct minimal_symbol
*msym
;
5355 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5357 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5364 break_command (char *arg
, int from_tty
)
5366 break_command_1 (arg
, 0, from_tty
);
5370 break_at_finish_command (char *arg
, int from_tty
)
5372 break_at_finish_command_1 (arg
, 0, from_tty
);
5376 break_at_finish_at_depth_command (char *arg
, int from_tty
)
5378 break_at_finish_at_depth_command_1 (arg
, 0, from_tty
);
5382 tbreak_command (char *arg
, int from_tty
)
5384 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5388 tbreak_at_finish_command (char *arg
, int from_tty
)
5390 break_at_finish_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5394 hbreak_command (char *arg
, int from_tty
)
5396 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5400 thbreak_command (char *arg
, int from_tty
)
5402 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5406 stop_command (char *arg
, int from_tty
)
5408 printf_filtered ("Specify the type of breakpoint to set.\n\
5409 Usage: stop in <function | address>\n\
5414 stopin_command (char *arg
, int from_tty
)
5418 if (arg
== (char *) NULL
)
5420 else if (*arg
!= '*')
5425 /* look for a ':'. If this is a line number specification, then
5426 say it is bad, otherwise, it should be an address or
5427 function/method name */
5428 while (*argptr
&& !hasColon
)
5430 hasColon
= (*argptr
== ':');
5435 badInput
= (*argptr
!= ':'); /* Not a class::method */
5437 badInput
= isdigit (*arg
); /* a simple line number */
5441 printf_filtered ("Usage: stop in <function | address>\n");
5443 break_command_1 (arg
, 0, from_tty
);
5447 stopat_command (char *arg
, int from_tty
)
5451 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5458 /* look for a ':'. If there is a '::' then get out, otherwise
5459 it is probably a line number. */
5460 while (*argptr
&& !hasColon
)
5462 hasColon
= (*argptr
== ':');
5467 badInput
= (*argptr
== ':'); /* we have class::method */
5469 badInput
= !isdigit (*arg
); /* not a line number */
5473 printf_filtered ("Usage: stop at <line>\n");
5475 break_command_1 (arg
, 0, from_tty
);
5478 /* accessflag: hw_write: watch write,
5479 hw_read: watch read,
5480 hw_access: watch access (read or write) */
5482 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5484 struct breakpoint
*b
;
5485 struct symtab_and_line sal
;
5486 struct expression
*exp
;
5487 struct block
*exp_valid_block
;
5488 struct value
*val
, *mark
;
5489 struct frame_info
*frame
;
5490 struct frame_info
*prev_frame
= NULL
;
5491 char *exp_start
= NULL
;
5492 char *exp_end
= NULL
;
5493 char *tok
, *end_tok
;
5495 char *cond_start
= NULL
;
5496 char *cond_end
= NULL
;
5497 struct expression
*cond
= NULL
;
5498 int i
, other_type_used
, target_resources_ok
= 0;
5499 enum bptype bp_type
;
5502 init_sal (&sal
); /* initialize to zeroes */
5504 /* Parse arguments. */
5505 innermost_block
= NULL
;
5507 exp
= parse_exp_1 (&arg
, 0, 0);
5509 exp_valid_block
= innermost_block
;
5510 mark
= value_mark ();
5511 val
= evaluate_expression (exp
);
5512 release_value (val
);
5513 if (VALUE_LAZY (val
))
5514 value_fetch_lazy (val
);
5517 while (*tok
== ' ' || *tok
== '\t')
5521 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5524 toklen
= end_tok
- tok
;
5525 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5527 tok
= cond_start
= end_tok
+ 1;
5528 cond
= parse_exp_1 (&tok
, 0, 0);
5532 error ("Junk at end of command.");
5534 if (accessflag
== hw_read
)
5535 bp_type
= bp_read_watchpoint
;
5536 else if (accessflag
== hw_access
)
5537 bp_type
= bp_access_watchpoint
;
5539 bp_type
= bp_hardware_watchpoint
;
5541 mem_cnt
= can_use_hardware_watchpoint (val
);
5542 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5543 error ("Expression cannot be implemented with read/access watchpoint.");
5546 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5547 target_resources_ok
=
5548 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5550 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5551 error ("Target does not support this type of hardware watchpoint.");
5553 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5554 error ("Target can only support one kind of HW watchpoint at a time.");
5557 #if defined(HPUXHPPA)
5558 /* On HP-UX if you set a h/w
5559 watchpoint before the "run" command, the inferior dies with a e.g.,
5560 SIGILL once you start it. I initially believed this was due to a
5561 bad interaction between page protection traps and the initial
5562 startup sequence by the dynamic linker.
5564 However, I tried avoiding that by having HP-UX's implementation of
5565 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5566 yet, which forced slow watches before a "run" or "attach", and it
5567 still fails somewhere in the startup code.
5569 Until I figure out what's happening, I'm disallowing watches altogether
5570 before the "run" or "attach" command. We'll tell the user they must
5571 set watches after getting the program started. */
5572 if (!target_has_execution
)
5574 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5577 #endif /* HPUXHPPA */
5579 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5580 watchpoint could not be set. */
5581 if (!mem_cnt
|| target_resources_ok
<= 0)
5582 bp_type
= bp_watchpoint
;
5584 /* Now set up the breakpoint. */
5585 b
= set_raw_breakpoint (sal
, bp_type
);
5586 set_breakpoint_count (breakpoint_count
+ 1);
5587 b
->number
= breakpoint_count
;
5588 b
->disposition
= disp_donttouch
;
5590 b
->exp_valid_block
= exp_valid_block
;
5591 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5595 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5599 frame
= block_innermost_frame (exp_valid_block
);
5602 prev_frame
= get_prev_frame (frame
);
5603 b
->watchpoint_frame
= get_frame_id (frame
);
5607 memset (&b
->watchpoint_frame
, 0, sizeof (b
->watchpoint_frame
));
5610 /* If the expression is "local", then set up a "watchpoint scope"
5611 breakpoint at the point where we've left the scope of the watchpoint
5613 if (innermost_block
)
5617 struct breakpoint
*scope_breakpoint
;
5618 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5619 bp_watchpoint_scope
);
5621 scope_breakpoint
->enable_state
= bp_enabled
;
5623 /* Automatically delete the breakpoint when it hits. */
5624 scope_breakpoint
->disposition
= disp_del
;
5626 /* Only break in the proper frame (help with recursion). */
5627 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5629 /* Set the address at which we will stop. */
5630 scope_breakpoint
->loc
->requested_address
5631 = get_frame_pc (prev_frame
);
5632 scope_breakpoint
->loc
->address
5633 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
);
5635 /* The scope breakpoint is related to the watchpoint. We
5636 will need to act on them together. */
5637 b
->related_breakpoint
= scope_breakpoint
;
5640 value_free_to_mark (mark
);
5644 /* Return count of locations need to be watched and can be handled
5645 in hardware. If the watchpoint can not be handled
5646 in hardware return zero. */
5648 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
5649 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
5650 ((BYTE_SIZE) <= (DEPRECATED_REGISTER_SIZE))
5653 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5654 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5655 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5659 can_use_hardware_watchpoint (struct value
*v
)
5661 int found_memory_cnt
= 0;
5662 struct value
*head
= v
;
5664 /* Did the user specifically forbid us to use hardware watchpoints? */
5665 if (!can_use_hw_watchpoints
)
5668 /* Make sure that the value of the expression depends only upon
5669 memory contents, and values computed from them within GDB. If we
5670 find any register references or function calls, we can't use a
5671 hardware watchpoint.
5673 The idea here is that evaluating an expression generates a series
5674 of values, one holding the value of every subexpression. (The
5675 expression a*b+c has five subexpressions: a, b, a*b, c, and
5676 a*b+c.) GDB's values hold almost enough information to establish
5677 the criteria given above --- they identify memory lvalues,
5678 register lvalues, computed values, etcetera. So we can evaluate
5679 the expression, and then scan the chain of values that leaves
5680 behind to decide whether we can detect any possible change to the
5681 expression's final value using only hardware watchpoints.
5683 However, I don't think that the values returned by inferior
5684 function calls are special in any way. So this function may not
5685 notice that an expression involving an inferior function call
5686 can't be watched with hardware watchpoints. FIXME. */
5687 for (; v
; v
= v
->next
)
5689 if (VALUE_LVAL (v
) == lval_memory
)
5692 /* A lazy memory lvalue is one that GDB never needed to fetch;
5693 we either just used its address (e.g., `a' in `a.b') or
5694 we never needed it at all (e.g., `a' in `a,b'). */
5698 /* Ahh, memory we actually used! Check if we can cover
5699 it with hardware watchpoints. */
5700 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
5702 /* We only watch structs and arrays if user asked for it
5703 explicitly, never if they just happen to appear in a
5704 middle of some value chain. */
5706 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
5707 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
5709 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
5710 int len
= TYPE_LENGTH (VALUE_TYPE (v
));
5712 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
5719 else if (v
->lval
!= not_lval
&& v
->modifiable
== 0)
5720 return 0; /* ??? What does this represent? */
5721 else if (v
->lval
== lval_register
)
5722 return 0; /* cannot watch a register with a HW watchpoint */
5725 /* The expression itself looks suitable for using a hardware
5726 watchpoint, but give the target machine a chance to reject it. */
5727 return found_memory_cnt
;
5731 watch_command_wrapper (char *arg
, int from_tty
)
5733 watch_command (arg
, from_tty
);
5737 watch_command (char *arg
, int from_tty
)
5739 watch_command_1 (arg
, hw_write
, from_tty
);
5743 rwatch_command_wrapper (char *arg
, int from_tty
)
5745 rwatch_command (arg
, from_tty
);
5749 rwatch_command (char *arg
, int from_tty
)
5751 watch_command_1 (arg
, hw_read
, from_tty
);
5755 awatch_command_wrapper (char *arg
, int from_tty
)
5757 awatch_command (arg
, from_tty
);
5761 awatch_command (char *arg
, int from_tty
)
5763 watch_command_1 (arg
, hw_access
, from_tty
);
5767 /* Helper routines for the until_command routine in infcmd.c. Here
5768 because it uses the mechanisms of breakpoints. */
5770 /* This function is called by fetch_inferior_event via the
5771 cmd_continuation pointer, to complete the until command. It takes
5772 care of cleaning up the temporary breakpoints set up by the until
5775 until_break_command_continuation (struct continuation_arg
*arg
)
5777 struct cleanup
*cleanups
;
5779 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
5780 do_exec_cleanups (cleanups
);
5784 until_break_command (char *arg
, int from_tty
, int anywhere
)
5786 struct symtabs_and_lines sals
;
5787 struct symtab_and_line sal
;
5788 struct frame_info
*prev_frame
= get_prev_frame (deprecated_selected_frame
);
5789 struct breakpoint
*breakpoint
;
5790 struct cleanup
*old_chain
;
5791 struct continuation_arg
*arg1
;
5794 clear_proceed_status ();
5796 /* Set a breakpoint where the user wants it and at return from
5799 if (default_breakpoint_valid
)
5800 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
5801 default_breakpoint_line
, (char ***) NULL
, NULL
);
5803 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
5804 0, (char ***) NULL
, NULL
);
5806 if (sals
.nelts
!= 1)
5807 error ("Couldn't get information on specified line.");
5810 xfree (sals
.sals
); /* malloc'd, so freed */
5813 error ("Junk at end of arguments.");
5815 resolve_sal_pc (&sal
);
5818 /* If the user told us to continue until a specified location,
5819 we don't specify a frame at which we need to stop. */
5820 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
5822 /* Otherwise, specify the current frame, because we want to stop only
5823 at the very same frame. */
5824 breakpoint
= set_momentary_breakpoint (sal
,
5825 get_frame_id (deprecated_selected_frame
),
5828 if (!event_loop_p
|| !target_can_async_p ())
5829 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
5831 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
5833 /* If we are running asynchronously, and the target supports async
5834 execution, we are not waiting for the target to stop, in the call
5835 tp proceed, below. This means that we cannot delete the
5836 brekpoints until the target has actually stopped. The only place
5837 where we get a chance to do that is in fetch_inferior_event, so
5838 we must set things up for that. */
5840 if (event_loop_p
&& target_can_async_p ())
5842 /* In this case the arg for the continuation is just the point
5843 in the exec_cleanups chain from where to start doing
5844 cleanups, because all the continuation does is the cleanups in
5845 the exec_cleanup_chain. */
5847 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
5849 arg1
->data
.pointer
= old_chain
;
5851 add_continuation (until_break_command_continuation
, arg1
);
5854 /* Keep within the current frame, or in frames called by the current
5858 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
5859 sal
.pc
= get_frame_pc (prev_frame
);
5860 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
5862 if (!event_loop_p
|| !target_can_async_p ())
5863 make_cleanup_delete_breakpoint (breakpoint
);
5865 make_exec_cleanup_delete_breakpoint (breakpoint
);
5868 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
5869 /* Do the cleanups now, anly if we are not running asynchronously,
5870 of if we are, but the target is still synchronous. */
5871 if (!event_loop_p
|| !target_can_async_p ())
5872 do_cleanups (old_chain
);
5876 ep_skip_leading_whitespace (char **s
)
5878 if ((s
== NULL
) || (*s
== NULL
))
5880 while (isspace (**s
))
5884 /* This function examines a string, and attempts to find a token
5885 that might be an event name in the leading characters. If a
5886 possible match is found, a pointer to the last character of
5887 the token is returned. Else, NULL is returned. */
5890 ep_find_event_name_end (char *arg
)
5893 char *event_name_end
= NULL
;
5895 /* If we could depend upon the presense of strrpbrk, we'd use that... */
5899 /* We break out of the loop when we find a token delimiter.
5900 Basically, we're looking for alphanumerics and underscores;
5901 anything else delimites the token. */
5904 if (!isalnum (*s
) && (*s
!= '_'))
5910 return event_name_end
;
5914 /* This function attempts to parse an optional "if <cond>" clause
5915 from the arg string. If one is not found, it returns NULL.
5917 Else, it returns a pointer to the condition string. (It does not
5918 attempt to evaluate the string against a particular block.) And,
5919 it updates arg to point to the first character following the parsed
5920 if clause in the arg string. */
5923 ep_parse_optional_if_clause (char **arg
)
5927 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
5930 /* Skip the "if" keyword. */
5933 /* Skip any extra leading whitespace, and record the start of the
5934 condition string. */
5935 ep_skip_leading_whitespace (arg
);
5938 /* Assume that the condition occupies the remainder of the arg string. */
5939 (*arg
) += strlen (cond_string
);
5944 /* This function attempts to parse an optional filename from the arg
5945 string. If one is not found, it returns NULL.
5947 Else, it returns a pointer to the parsed filename. (This function
5948 makes no attempt to verify that a file of that name exists, or is
5949 accessible.) And, it updates arg to point to the first character
5950 following the parsed filename in the arg string.
5952 Note that clients needing to preserve the returned filename for
5953 future access should copy it to their own buffers. */
5955 ep_parse_optional_filename (char **arg
)
5957 static char filename
[1024];
5962 if ((*arg_p
== '\0') || isspace (*arg_p
))
5980 /* Commands to deal with catching events, such as signals, exceptions,
5981 process start/exit, etc. */
5985 catch_fork
, catch_vfork
5990 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
5993 char *cond_string
= NULL
;
5995 ep_skip_leading_whitespace (&arg
);
5997 /* The allowed syntax is:
5999 catch [v]fork if <cond>
6001 First, check if there's an if clause. */
6002 cond_string
= ep_parse_optional_if_clause (&arg
);
6004 if ((*arg
!= '\0') && !isspace (*arg
))
6005 error ("Junk at end of arguments.");
6007 /* If this target supports it, create a fork or vfork catchpoint
6008 and enable reporting of such events. */
6012 create_fork_event_catchpoint (tempflag
, cond_string
);
6015 create_vfork_event_catchpoint (tempflag
, cond_string
);
6018 error ("unsupported or unknown fork kind; cannot catch it");
6024 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6026 char *cond_string
= NULL
;
6028 ep_skip_leading_whitespace (&arg
);
6030 /* The allowed syntax is:
6032 catch exec if <cond>
6034 First, check if there's an if clause. */
6035 cond_string
= ep_parse_optional_if_clause (&arg
);
6037 if ((*arg
!= '\0') && !isspace (*arg
))
6038 error ("Junk at end of arguments.");
6040 /* If this target supports it, create an exec catchpoint
6041 and enable reporting of such events. */
6042 create_exec_event_catchpoint (tempflag
, cond_string
);
6046 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6048 char *dll_pathname
= NULL
;
6049 char *cond_string
= NULL
;
6051 ep_skip_leading_whitespace (&arg
);
6053 /* The allowed syntax is:
6055 catch load if <cond>
6056 catch load <filename>
6057 catch load <filename> if <cond>
6059 The user is not allowed to specify the <filename> after an
6062 We'll ignore the pathological case of a file named "if".
6064 First, check if there's an if clause. If so, then there
6065 cannot be a filename. */
6066 cond_string
= ep_parse_optional_if_clause (&arg
);
6068 /* If there was an if clause, then there cannot be a filename.
6069 Else, there might be a filename and an if clause. */
6070 if (cond_string
== NULL
)
6072 dll_pathname
= ep_parse_optional_filename (&arg
);
6073 ep_skip_leading_whitespace (&arg
);
6074 cond_string
= ep_parse_optional_if_clause (&arg
);
6077 if ((*arg
!= '\0') && !isspace (*arg
))
6078 error ("Junk at end of arguments.");
6080 /* Create a load breakpoint that only triggers when a load of
6081 the specified dll (or any dll, if no pathname was specified)
6083 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6084 dll_pathname
, cond_string
);
6088 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6090 char *dll_pathname
= NULL
;
6091 char *cond_string
= NULL
;
6093 ep_skip_leading_whitespace (&arg
);
6095 /* The allowed syntax is:
6097 catch unload if <cond>
6098 catch unload <filename>
6099 catch unload <filename> if <cond>
6101 The user is not allowed to specify the <filename> after an
6104 We'll ignore the pathological case of a file named "if".
6106 First, check if there's an if clause. If so, then there
6107 cannot be a filename. */
6108 cond_string
= ep_parse_optional_if_clause (&arg
);
6110 /* If there was an if clause, then there cannot be a filename.
6111 Else, there might be a filename and an if clause. */
6112 if (cond_string
== NULL
)
6114 dll_pathname
= ep_parse_optional_filename (&arg
);
6115 ep_skip_leading_whitespace (&arg
);
6116 cond_string
= ep_parse_optional_if_clause (&arg
);
6119 if ((*arg
!= '\0') && !isspace (*arg
))
6120 error ("Junk at end of arguments.");
6122 /* Create an unload breakpoint that only triggers when an unload of
6123 the specified dll (or any dll, if no pathname was specified)
6125 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6126 dll_pathname
, cond_string
);
6129 /* Commands to deal with catching exceptions. */
6131 /* Set a breakpoint at the specified callback routine for an
6132 exception event callback */
6135 create_exception_catchpoint (int tempflag
, char *cond_string
,
6136 enum exception_event_kind ex_event
,
6137 struct symtab_and_line
*sal
)
6139 struct breakpoint
*b
;
6140 int thread
= -1; /* All threads. */
6143 if (!sal
) /* no exception support? */
6148 case EX_EVENT_THROW
:
6149 bptype
= bp_catch_throw
;
6151 case EX_EVENT_CATCH
:
6152 bptype
= bp_catch_catch
;
6154 default: /* error condition */
6155 error ("Internal error -- invalid catchpoint kind");
6158 b
= set_raw_breakpoint (*sal
, bptype
);
6159 set_breakpoint_count (breakpoint_count
+ 1);
6160 b
->number
= breakpoint_count
;
6162 b
->cond_string
= (cond_string
== NULL
) ?
6163 NULL
: savestring (cond_string
, strlen (cond_string
));
6165 b
->addr_string
= NULL
;
6166 b
->enable_state
= bp_enabled
;
6167 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6171 static enum print_stop_action
6172 print_exception_catchpoint (struct breakpoint
*b
)
6174 annotate_catchpoint (b
->number
);
6176 if (strstr (b
->addr_string
, "throw") != NULL
)
6177 printf_filtered ("\nCatchpoint %d (exception thrown)\n",
6180 printf_filtered ("\nCatchpoint %d (exception caught)\n",
6183 return PRINT_SRC_AND_LOC
;
6187 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6192 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6195 *last_addr
= b
->loc
->address
;
6196 if (strstr (b
->addr_string
, "throw") != NULL
)
6197 ui_out_field_string (uiout
, "what", "exception throw");
6199 ui_out_field_string (uiout
, "what", "exception catch");
6203 print_mention_exception_catchpoint (struct breakpoint
*b
)
6205 if (strstr (b
->addr_string
, "throw") != NULL
)
6206 printf_filtered ("Catchpoint %d (throw)", b
->number
);
6208 printf_filtered ("Catchpoint %d (catch)", b
->number
);
6211 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6212 print_exception_catchpoint
,
6213 print_one_exception_catchpoint
,
6214 print_mention_exception_catchpoint
6218 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6219 enum exception_event_kind ex_event
, int from_tty
)
6221 char *trigger_func_name
, *nameptr
;
6222 struct symtabs_and_lines sals
;
6223 struct breakpoint
*b
;
6225 if (ex_event
== EX_EVENT_CATCH
)
6226 trigger_func_name
= xstrdup ("__cxa_begin_catch");
6228 trigger_func_name
= xstrdup ("__cxa_throw");
6230 nameptr
= trigger_func_name
;
6231 sals
= decode_line_1 (&nameptr
, 1, NULL
, 0, NULL
, NULL
);
6232 if (sals
.nelts
== 0)
6234 xfree (trigger_func_name
);
6238 b
= set_raw_breakpoint (sals
.sals
[0], bp_breakpoint
);
6239 set_breakpoint_count (breakpoint_count
+ 1);
6240 b
->number
= breakpoint_count
;
6242 b
->cond_string
= (cond_string
== NULL
) ?
6243 NULL
: savestring (cond_string
, strlen (cond_string
));
6245 b
->addr_string
= trigger_func_name
;
6246 b
->enable_state
= bp_enabled
;
6247 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6248 b
->ops
= &gnu_v3_exception_catchpoint_ops
;
6255 /* Deal with "catch catch" and "catch throw" commands */
6258 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6259 int tempflag
, int from_tty
)
6261 char *cond_string
= NULL
;
6262 struct symtab_and_line
*sal
= NULL
;
6264 ep_skip_leading_whitespace (&arg
);
6266 cond_string
= ep_parse_optional_if_clause (&arg
);
6268 if ((*arg
!= '\0') && !isspace (*arg
))
6269 error ("Junk at end of arguments.");
6271 if ((ex_event
!= EX_EVENT_THROW
) &&
6272 (ex_event
!= EX_EVENT_CATCH
))
6273 error ("Unsupported or unknown exception event; cannot catch it");
6275 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6278 /* See if we can find a callback routine */
6279 sal
= target_enable_exception_callback (ex_event
, 1);
6283 /* We have callbacks from the runtime system for exceptions.
6284 Set a breakpoint on the sal found, if no errors */
6285 if (sal
!= (struct symtab_and_line
*) -1)
6286 create_exception_catchpoint (tempflag
, cond_string
, ex_event
, sal
);
6288 return; /* something went wrong with setting up callbacks */
6291 warning ("Unsupported with this platform/compiler combination.");
6294 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6295 inside a catch_errors */
6298 cover_target_enable_exception_callback (void *arg
)
6300 args_for_catchpoint_enable
*args
= arg
;
6301 struct symtab_and_line
*sal
;
6302 sal
= target_enable_exception_callback (args
->kind
, args
->enable_p
);
6305 else if (sal
== (struct symtab_and_line
*) -1)
6308 return 1; /*is valid */
6312 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6315 /* The first argument may be an event name, such as "start" or "load".
6316 If so, then handle it as such. If it doesn't match an event name,
6317 then attempt to interpret it as an exception name. (This latter is
6318 the v4.16-and-earlier GDB meaning of the "catch" command.)
6320 First, try to find the bounds of what might be an event name. */
6321 char *arg1_start
= arg
;
6325 if (arg1_start
== NULL
)
6327 /* Old behaviour was to use pre-v-4.16 syntax */
6328 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6330 /* Now, this is not allowed */
6331 error ("Catch requires an event name.");
6334 arg1_end
= ep_find_event_name_end (arg1_start
);
6335 if (arg1_end
== NULL
)
6336 error ("catch requires an event");
6337 arg1_length
= arg1_end
+ 1 - arg1_start
;
6339 /* Try to match what we found against known event names. */
6340 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6342 error ("Catch of signal not yet implemented");
6344 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6346 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6347 tempflag
, from_tty
);
6349 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6351 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6352 tempflag
, from_tty
);
6354 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6356 error ("Catch of thread_start not yet implemented");
6358 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6360 error ("Catch of thread_exit not yet implemented");
6362 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6364 error ("Catch of thread_join not yet implemented");
6366 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6368 error ("Catch of start not yet implemented");
6370 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6372 error ("Catch of exit not yet implemented");
6374 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6376 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6378 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6380 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6382 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6384 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6386 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6388 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6390 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6392 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6394 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6396 error ("Catch of stop not yet implemented");
6399 /* This doesn't appear to be an event name */
6403 /* Pre-v.4.16 behaviour was to treat the argument
6404 as the name of an exception */
6405 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6406 /* Now this is not allowed */
6407 error ("Unknown event kind specified for catch");
6412 /* Used by the gui, could be made a worker for other things. */
6415 set_breakpoint_sal (struct symtab_and_line sal
)
6417 struct breakpoint
*b
;
6418 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6419 set_breakpoint_count (breakpoint_count
+ 1);
6420 b
->number
= breakpoint_count
;
6427 catch_command (char *arg
, int from_tty
)
6429 catch_command_1 (arg
, 0, from_tty
);
6434 tcatch_command (char *arg
, int from_tty
)
6436 catch_command_1 (arg
, 1, from_tty
);
6439 /* Delete breakpoints by address or line. */
6442 clear_command (char *arg
, int from_tty
)
6444 struct breakpoint
*b
, *tmp
, *prev
, *found
;
6446 struct symtabs_and_lines sals
;
6447 struct symtab_and_line sal
;
6452 sals
= decode_line_spec (arg
, 1);
6457 sals
.sals
= (struct symtab_and_line
*)
6458 xmalloc (sizeof (struct symtab_and_line
));
6459 make_cleanup (xfree
, sals
.sals
);
6460 init_sal (&sal
); /* initialize to zeroes */
6461 sal
.line
= default_breakpoint_line
;
6462 sal
.symtab
= default_breakpoint_symtab
;
6463 sal
.pc
= default_breakpoint_address
;
6464 if (sal
.symtab
== 0)
6465 error ("No source file specified.");
6473 /* For each line spec given, delete bps which correspond
6474 to it. Do it in two passes, solely to preserve the current
6475 behavior that from_tty is forced true if we delete more than
6479 for (i
= 0; i
< sals
.nelts
; i
++)
6481 /* If exact pc given, clear bpts at that pc.
6482 If line given (pc == 0), clear all bpts on specified line.
6483 If defaulting, clear all bpts on default line
6486 defaulting sal.pc != 0 tests to do
6491 1 0 <can't happen> */
6496 /* Find all matching breakpoints, remove them from the
6497 breakpoint chain, and add them to the 'found' chain. */
6498 ALL_BREAKPOINTS_SAFE (b
, tmp
)
6500 /* Are we going to delete b? */
6501 if (b
->type
!= bp_none
6502 && b
->type
!= bp_watchpoint
6503 && b
->type
!= bp_hardware_watchpoint
6504 && b
->type
!= bp_read_watchpoint
6505 && b
->type
!= bp_access_watchpoint
6506 /* Not if b is a watchpoint of any sort... */
6507 && (((sal
.pc
&& (b
->loc
->address
== sal
.pc
))
6508 && (!section_is_overlay (b
->loc
->section
)
6509 || b
->loc
->section
== sal
.section
))
6510 /* Yes, if sal.pc matches b (modulo overlays). */
6511 || ((default_match
|| (0 == sal
.pc
))
6512 && b
->source_file
!= NULL
6513 && sal
.symtab
!= NULL
6514 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6515 && b
->line_number
== sal
.line
)))
6516 /* Yes, if sal source file and line matches b. */
6518 /* Remove it from breakpoint_chain... */
6519 if (b
== breakpoint_chain
)
6521 /* b is at the head of the list */
6522 breakpoint_chain
= b
->next
;
6526 prev
->next
= b
->next
;
6528 /* And add it to 'found' chain. */
6534 /* Keep b, and keep a pointer to it. */
6539 /* Now go thru the 'found' chain and delete them. */
6543 error ("No breakpoint at %s.", arg
);
6545 error ("No breakpoint at this line.");
6549 from_tty
= 1; /* Always report if deleted more than one */
6551 printf_unfiltered ("Deleted breakpoint%s ", found
->next
? "s" : "");
6552 breakpoints_changed ();
6556 printf_unfiltered ("%d ", found
->number
);
6558 delete_breakpoint (found
);
6562 putchar_unfiltered ('\n');
6565 /* Delete breakpoint in BS if they are `delete' breakpoints and
6566 all breakpoints that are marked for deletion, whether hit or not.
6567 This is called after any breakpoint is hit, or after errors. */
6570 breakpoint_auto_delete (bpstat bs
)
6572 struct breakpoint
*b
, *temp
;
6574 for (; bs
; bs
= bs
->next
)
6575 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== disp_del
6577 delete_breakpoint (bs
->breakpoint_at
);
6579 ALL_BREAKPOINTS_SAFE (b
, temp
)
6581 if (b
->disposition
== disp_del_at_next_stop
)
6582 delete_breakpoint (b
);
6586 /* Delete a breakpoint and clean up all traces of it in the data
6590 delete_breakpoint (struct breakpoint
*bpt
)
6592 struct breakpoint
*b
;
6594 struct bp_location
*loc
;
6597 error ("Internal error (attempted to delete a NULL breakpoint)");
6600 /* Has this bp already been deleted? This can happen because multiple
6601 lists can hold pointers to bp's. bpstat lists are especial culprits.
6603 One example of this happening is a watchpoint's scope bp. When the
6604 scope bp triggers, we notice that the watchpoint is out of scope, and
6605 delete it. We also delete its scope bp. But the scope bp is marked
6606 "auto-deleting", and is already on a bpstat. That bpstat is then
6607 checked for auto-deleting bp's, which are deleted.
6609 A real solution to this problem might involve reference counts in bp's,
6610 and/or giving them pointers back to their referencing bpstat's, and
6611 teaching delete_breakpoint to only free a bp's storage when no more
6612 references were extent. A cheaper bandaid was chosen. */
6613 if (bpt
->type
== bp_none
)
6616 if (delete_breakpoint_hook
)
6617 delete_breakpoint_hook (bpt
);
6618 breakpoint_delete_event (bpt
->number
);
6620 if (bpt
->loc
->inserted
)
6621 remove_breakpoint (bpt
->loc
, mark_inserted
);
6623 if (breakpoint_chain
== bpt
)
6624 breakpoint_chain
= bpt
->next
;
6626 if (bp_location_chain
== bpt
->loc
)
6627 bp_location_chain
= bpt
->loc
->next
;
6629 /* If we have callback-style exception catchpoints, don't go through
6630 the adjustments to the C++ runtime library etc. if the inferior
6631 isn't actually running. target_enable_exception_callback for a
6632 null target ops vector gives an undesirable error message, so we
6633 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6634 exceptions are supported in this way, it's OK for now. FIXME */
6635 if (ep_is_exception_catchpoint (bpt
) && target_has_execution
)
6637 /* Format possible error msg */
6638 char *message
= xstrprintf ("Error in deleting catchpoint %d:\n",
6640 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
6641 args_for_catchpoint_enable args
;
6642 args
.kind
= bpt
->type
== bp_catch_catch
?
6643 EX_EVENT_CATCH
: EX_EVENT_THROW
;
6645 catch_errors (cover_target_enable_exception_callback
, &args
,
6646 message
, RETURN_MASK_ALL
);
6647 do_cleanups (cleanups
);
6654 b
->next
= bpt
->next
;
6658 ALL_BP_LOCATIONS (loc
)
6659 if (loc
->next
== bpt
->loc
)
6661 loc
->next
= bpt
->loc
->next
;
6665 check_duplicates (bpt
);
6666 /* If this breakpoint was inserted, and there is another breakpoint
6667 at the same address, we need to insert the other breakpoint. */
6668 if (bpt
->loc
->inserted
6669 && bpt
->type
!= bp_hardware_watchpoint
6670 && bpt
->type
!= bp_read_watchpoint
6671 && bpt
->type
!= bp_access_watchpoint
6672 && bpt
->type
!= bp_catch_fork
6673 && bpt
->type
!= bp_catch_vfork
6674 && bpt
->type
!= bp_catch_exec
)
6677 if (b
->loc
->address
== bpt
->loc
->address
6678 && b
->loc
->section
== bpt
->loc
->section
6679 && !b
->loc
->duplicate
6680 && b
->enable_state
!= bp_disabled
6681 && b
->enable_state
!= bp_shlib_disabled
6682 && b
->enable_state
!= bp_call_disabled
)
6686 /* We should never reach this point if there is a permanent
6687 breakpoint at the same address as the one being deleted.
6688 If there is a permanent breakpoint somewhere, it should
6689 always be the only one inserted. */
6690 if (b
->enable_state
== bp_permanent
)
6691 internal_error (__FILE__
, __LINE__
,
6692 "another breakpoint was inserted on top of "
6693 "a permanent breakpoint");
6695 if (b
->type
== bp_hardware_breakpoint
)
6696 val
= target_insert_hw_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
6698 val
= target_insert_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
6700 /* If there was an error in the insert, print a message, then stop execution. */
6703 struct ui_file
*tmp_error_stream
= mem_fileopen ();
6704 make_cleanup_ui_file_delete (tmp_error_stream
);
6707 if (b
->type
== bp_hardware_breakpoint
)
6709 fprintf_unfiltered (tmp_error_stream
,
6710 "Cannot insert hardware breakpoint %d.\n"
6711 "You may have requested too many hardware breakpoints.\n",
6716 fprintf_unfiltered (tmp_error_stream
, "Cannot insert breakpoint %d.\n", b
->number
);
6717 fprintf_filtered (tmp_error_stream
, "Error accessing memory address ");
6718 print_address_numeric (b
->loc
->address
, 1, tmp_error_stream
);
6719 fprintf_filtered (tmp_error_stream
, ": %s.\n",
6720 safe_strerror (val
));
6723 fprintf_unfiltered (tmp_error_stream
,"The same program may be running in another process.");
6724 target_terminal_ours_for_output ();
6725 error_stream(tmp_error_stream
);
6728 b
->loc
->inserted
= 1;
6732 free_command_lines (&bpt
->commands
);
6735 if (bpt
->cond_string
!= NULL
)
6736 xfree (bpt
->cond_string
);
6737 if (bpt
->addr_string
!= NULL
)
6738 xfree (bpt
->addr_string
);
6739 if (bpt
->exp
!= NULL
)
6741 if (bpt
->exp_string
!= NULL
)
6742 xfree (bpt
->exp_string
);
6743 if (bpt
->val
!= NULL
)
6744 value_free (bpt
->val
);
6745 if (bpt
->source_file
!= NULL
)
6746 xfree (bpt
->source_file
);
6747 if (bpt
->dll_pathname
!= NULL
)
6748 xfree (bpt
->dll_pathname
);
6749 if (bpt
->triggered_dll_pathname
!= NULL
)
6750 xfree (bpt
->triggered_dll_pathname
);
6751 if (bpt
->exec_pathname
!= NULL
)
6752 xfree (bpt
->exec_pathname
);
6754 /* Be sure no bpstat's are pointing at it after it's been freed. */
6755 /* FIXME, how can we find all bpstat's?
6756 We just check stop_bpstat for now. */
6757 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
6758 if (bs
->breakpoint_at
== bpt
)
6760 bs
->breakpoint_at
= NULL
;
6762 /* bs->commands will be freed later. */
6764 /* On the chance that someone will soon try again to delete this same
6765 bp, we mark it as deleted before freeing its storage. */
6766 bpt
->type
= bp_none
;
6773 do_delete_breakpoint_cleanup (void *b
)
6775 delete_breakpoint (b
);
6779 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
6781 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
6785 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
6787 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
6791 delete_command (char *arg
, int from_tty
)
6793 struct breakpoint
*b
, *temp
;
6799 int breaks_to_delete
= 0;
6801 /* Delete all breakpoints if no argument.
6802 Do not delete internal or call-dummy breakpoints, these
6803 have to be deleted with an explicit breakpoint number argument. */
6806 if (b
->type
!= bp_call_dummy
&&
6807 b
->type
!= bp_shlib_event
&&
6808 b
->type
!= bp_thread_event
&&
6809 b
->type
!= bp_overlay_event
&&
6811 breaks_to_delete
= 1;
6814 /* Ask user only if there are some breakpoints to delete. */
6816 || (breaks_to_delete
&& query ("Delete all breakpoints? ")))
6818 ALL_BREAKPOINTS_SAFE (b
, temp
)
6820 if (b
->type
!= bp_call_dummy
&&
6821 b
->type
!= bp_shlib_event
&&
6822 b
->type
!= bp_thread_event
&&
6823 b
->type
!= bp_overlay_event
&&
6825 delete_breakpoint (b
);
6830 map_breakpoint_numbers (arg
, delete_breakpoint
);
6833 /* Reset a breakpoint given it's struct breakpoint * BINT.
6834 The value we return ends up being the return value from catch_errors.
6835 Unused in this case. */
6838 breakpoint_re_set_one (void *bint
)
6840 /* get past catch_errs */
6841 struct breakpoint
*b
= (struct breakpoint
*) bint
;
6844 struct symtabs_and_lines sals
;
6846 enum enable_state save_enable
;
6851 warning ("attempted to reset apparently deleted breakpoint #%d?",
6855 case bp_hardware_breakpoint
:
6857 case bp_catch_unload
:
6858 if (b
->addr_string
== NULL
)
6860 /* Anything without a string can't be re-set. */
6861 delete_breakpoint (b
);
6864 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
6866 ``And a hack it is, although Apple's Darwin version of GDB
6867 contains an almost identical hack to implement a "future
6868 break" command. It seems to work in many real world cases,
6869 but it is easy to come up with a test case where the patch
6870 doesn't help at all.''
6872 ``It seems that the way GDB implements breakpoints - in -
6873 shared - libraries was designed for a.out shared library
6874 systems (SunOS 4) where shared libraries were loaded at a
6875 fixed address in memory. Since ELF shared libraries can (and
6876 will) be loaded at any address in memory, things break.
6877 Fixing this is not trivial. Therefore, I'm not sure whether
6878 we should add this hack to the branch only. I cannot
6879 guarantee that things will be fixed on the trunk in the near
6882 In case we have a problem, disable this breakpoint. We'll
6883 restore its status if we succeed. Don't disable a
6884 shlib_disabled breakpoint though. There's a fair chance we
6885 can't re-set it if the shared library it's in hasn't been
6887 save_enable
= b
->enable_state
;
6888 if (b
->enable_state
!= bp_shlib_disabled
)
6889 b
->enable_state
= bp_disabled
;
6891 set_language (b
->language
);
6892 input_radix
= b
->input_radix
;
6894 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
6895 for (i
= 0; i
< sals
.nelts
; i
++)
6897 resolve_sal_pc (&sals
.sals
[i
]);
6899 /* Reparse conditions, they might contain references to the
6901 if (b
->cond_string
!= NULL
)
6906 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
6909 /* We need to re-set the breakpoint if the address changes... */
6910 if (b
->loc
->address
!= sals
.sals
[i
].pc
6911 /* ...or new and old breakpoints both have source files, and
6912 the source file name or the line number changes... */
6913 || (b
->source_file
!= NULL
6914 && sals
.sals
[i
].symtab
!= NULL
6915 && (strcmp (b
->source_file
, sals
.sals
[i
].symtab
->filename
) != 0
6916 || b
->line_number
!= sals
.sals
[i
].line
)
6918 /* ...or we switch between having a source file and not having
6920 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
6923 if (b
->source_file
!= NULL
)
6924 xfree (b
->source_file
);
6925 if (sals
.sals
[i
].symtab
== NULL
)
6926 b
->source_file
= NULL
;
6929 savestring (sals
.sals
[i
].symtab
->filename
,
6930 strlen (sals
.sals
[i
].symtab
->filename
));
6931 b
->line_number
= sals
.sals
[i
].line
;
6932 b
->loc
->requested_address
= sals
.sals
[i
].pc
;
6934 = adjust_breakpoint_address (b
->loc
->requested_address
);
6936 /* Used to check for duplicates here, but that can
6937 cause trouble, as it doesn't check for disabled
6942 /* Might be better to do this just once per breakpoint_re_set,
6943 rather than once for every breakpoint. */
6944 breakpoints_changed ();
6946 b
->loc
->section
= sals
.sals
[i
].section
;
6947 b
->enable_state
= save_enable
; /* Restore it, this worked. */
6950 /* Now that this is re-enabled, check_duplicates
6952 check_duplicates (b
);
6959 case bp_hardware_watchpoint
:
6960 case bp_read_watchpoint
:
6961 case bp_access_watchpoint
:
6962 innermost_block
= NULL
;
6963 /* The issue arises of what context to evaluate this in. The
6964 same one as when it was set, but what does that mean when
6965 symbols have been re-read? We could save the filename and
6966 functionname, but if the context is more local than that, the
6967 best we could do would be something like how many levels deep
6968 and which index at that particular level, but that's going to
6969 be less stable than filenames or function names. */
6971 /* So for now, just use a global context. */
6975 /* Avoid re-freeing b->exp if an error during the call to
6976 parse_expression. */
6979 b
->exp
= parse_expression (b
->exp_string
);
6980 b
->exp_valid_block
= innermost_block
;
6981 mark
= value_mark ();
6984 value_free (b
->val
);
6985 /* Avoid re-freeing b->val if an error during the call to
6986 evaluate_expression. */
6989 b
->val
= evaluate_expression (b
->exp
);
6990 release_value (b
->val
);
6991 if (VALUE_LAZY (b
->val
) && breakpoint_enabled (b
))
6992 value_fetch_lazy (b
->val
);
6994 if (b
->cond_string
!= NULL
)
7000 /* Avoid re-freeing b->exp if an error during the call
7004 b
->cond
= parse_exp_1 (&s
, (struct block
*) 0, 0);
7006 if (breakpoint_enabled (b
))
7008 value_free_to_mark (mark
);
7010 case bp_catch_catch
:
7011 case bp_catch_throw
:
7013 /* We needn't really do anything to reset these, since the mask
7014 that requests them is unaffected by e.g., new libraries being
7017 case bp_catch_vfork
:
7022 printf_filtered ("Deleting unknown breakpoint type %d\n", b
->type
);
7024 /* Delete longjmp and overlay event breakpoints; they will be
7025 reset later by breakpoint_re_set. */
7027 case bp_longjmp_resume
:
7028 case bp_overlay_event
:
7029 delete_breakpoint (b
);
7032 /* This breakpoint is special, it's set up when the inferior
7033 starts and we really don't want to touch it. */
7034 case bp_shlib_event
:
7036 /* Like bp_shlib_event, this breakpoint type is special.
7037 Once it is set up, we do not want to touch it. */
7038 case bp_thread_event
:
7040 /* Keep temporary breakpoints, which can be encountered when we step
7041 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7042 Otherwise these should have been blown away via the cleanup chain
7043 or by breakpoint_init_inferior when we rerun the executable. */
7046 case bp_watchpoint_scope
:
7048 case bp_step_resume
:
7055 /* Re-set all breakpoints after symbols have been re-loaded. */
7057 breakpoint_re_set (void)
7059 struct breakpoint
*b
, *temp
;
7060 enum language save_language
;
7061 int save_input_radix
;
7063 save_language
= current_language
->la_language
;
7064 save_input_radix
= input_radix
;
7065 ALL_BREAKPOINTS_SAFE (b
, temp
)
7067 /* Format possible error msg */
7068 char *message
= xstrprintf ("Error in re-setting breakpoint %d:\n",
7070 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7071 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7072 do_cleanups (cleanups
);
7074 set_language (save_language
);
7075 input_radix
= save_input_radix
;
7077 if (GET_LONGJMP_TARGET_P ())
7079 create_longjmp_breakpoint ("longjmp");
7080 create_longjmp_breakpoint ("_longjmp");
7081 create_longjmp_breakpoint ("siglongjmp");
7082 create_longjmp_breakpoint ("_siglongjmp");
7083 create_longjmp_breakpoint (NULL
);
7086 create_overlay_event_breakpoint ("_ovly_debug_event");
7089 /* Reset the thread number of this breakpoint:
7091 - If the breakpoint is for all threads, leave it as-is.
7092 - Else, reset it to the current thread for inferior_ptid. */
7094 breakpoint_re_set_thread (struct breakpoint
*b
)
7096 if (b
->thread
!= -1)
7098 if (in_thread_list (inferior_ptid
))
7099 b
->thread
= pid_to_thread_id (inferior_ptid
);
7103 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7104 If from_tty is nonzero, it prints a message to that effect,
7105 which ends with a period (no newline). */
7108 set_ignore_count (int bptnum
, int count
, int from_tty
)
7110 struct breakpoint
*b
;
7116 if (b
->number
== bptnum
)
7118 b
->ignore_count
= count
;
7122 printf_filtered ("Will stop next time breakpoint %d is reached.",
7124 else if (count
== 1)
7125 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7128 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7131 breakpoints_changed ();
7132 breakpoint_modify_event (b
->number
);
7136 error ("No breakpoint number %d.", bptnum
);
7139 /* Clear the ignore counts of all breakpoints. */
7141 breakpoint_clear_ignore_counts (void)
7143 struct breakpoint
*b
;
7146 b
->ignore_count
= 0;
7149 /* Command to set ignore-count of breakpoint N to COUNT. */
7152 ignore_command (char *args
, int from_tty
)
7158 error_no_arg ("a breakpoint number");
7160 num
= get_number (&p
);
7162 error ("bad breakpoint number: '%s'", args
);
7164 error ("Second argument (specified ignore-count) is missing.");
7166 set_ignore_count (num
,
7167 longest_to_int (value_as_long (parse_and_eval (p
))),
7170 printf_filtered ("\n");
7173 /* Call FUNCTION on each of the breakpoints
7174 whose numbers are given in ARGS. */
7177 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7182 struct breakpoint
*b
, *tmp
;
7186 error_no_arg ("one or more breakpoint numbers");
7193 num
= get_number_or_range (&p1
);
7196 warning ("bad breakpoint number at or near '%s'", p
);
7200 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7201 if (b
->number
== num
)
7203 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7206 if (related_breakpoint
)
7207 function (related_breakpoint
);
7211 printf_unfiltered ("No breakpoint number %d.\n", num
);
7217 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7218 If from_tty is nonzero, it prints a message to that effect,
7219 which ends with a period (no newline). */
7222 disable_breakpoint (struct breakpoint
*bpt
)
7224 /* Never disable a watchpoint scope breakpoint; we want to
7225 hit them when we leave scope so we can delete both the
7226 watchpoint and its scope breakpoint at that time. */
7227 if (bpt
->type
== bp_watchpoint_scope
)
7230 /* You can't disable permanent breakpoints. */
7231 if (bpt
->enable_state
== bp_permanent
)
7234 bpt
->enable_state
= bp_disabled
;
7236 check_duplicates (bpt
);
7238 if (modify_breakpoint_hook
)
7239 modify_breakpoint_hook (bpt
);
7240 breakpoint_modify_event (bpt
->number
);
7244 disable_command (char *args
, int from_tty
)
7246 struct breakpoint
*bpt
;
7248 ALL_BREAKPOINTS (bpt
)
7252 warning ("attempted to disable apparently deleted breakpoint #%d?",
7257 case bp_catch_unload
:
7259 case bp_catch_vfork
:
7261 case bp_catch_catch
:
7262 case bp_catch_throw
:
7263 case bp_hardware_breakpoint
:
7265 case bp_hardware_watchpoint
:
7266 case bp_read_watchpoint
:
7267 case bp_access_watchpoint
:
7268 disable_breakpoint (bpt
);
7273 map_breakpoint_numbers (args
, disable_breakpoint
);
7277 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7279 struct frame_info
*save_selected_frame
= NULL
;
7280 int save_selected_frame_level
= -1;
7281 int target_resources_ok
, other_type_used
;
7284 if (bpt
->type
== bp_hardware_breakpoint
)
7287 i
= hw_breakpoint_used_count ();
7288 target_resources_ok
=
7289 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7291 if (target_resources_ok
== 0)
7292 error ("No hardware breakpoint support in the target.");
7293 else if (target_resources_ok
< 0)
7294 error ("Hardware breakpoints used exceeds limit.");
7297 if (bpt
->enable_state
!= bp_permanent
)
7298 bpt
->enable_state
= bp_enabled
;
7299 bpt
->disposition
= disposition
;
7300 check_duplicates (bpt
);
7301 breakpoints_changed ();
7303 if (bpt
->type
== bp_watchpoint
||
7304 bpt
->type
== bp_hardware_watchpoint
||
7305 bpt
->type
== bp_read_watchpoint
||
7306 bpt
->type
== bp_access_watchpoint
)
7308 if (bpt
->exp_valid_block
!= NULL
)
7310 struct frame_info
*fr
=
7311 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7315 Cannot enable watchpoint %d because the block in which its expression\n\
7316 is valid is not currently in scope.\n", bpt
->number
);
7317 bpt
->enable_state
= bp_disabled
;
7321 save_selected_frame
= deprecated_selected_frame
;
7322 save_selected_frame_level
= frame_relative_level (deprecated_selected_frame
);
7326 value_free (bpt
->val
);
7327 mark
= value_mark ();
7328 bpt
->val
= evaluate_expression (bpt
->exp
);
7329 release_value (bpt
->val
);
7330 if (VALUE_LAZY (bpt
->val
))
7331 value_fetch_lazy (bpt
->val
);
7333 if (bpt
->type
== bp_hardware_watchpoint
||
7334 bpt
->type
== bp_read_watchpoint
||
7335 bpt
->type
== bp_access_watchpoint
)
7337 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7338 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7340 /* Hack around 'unused var' error for some targets here */
7342 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7343 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7344 /* we can consider of type is bp_hardware_watchpoint, convert to
7345 bp_watchpoint in the following condition */
7346 if (target_resources_ok
< 0)
7349 Cannot enable watchpoint %d because target watch resources\n\
7350 have been allocated for other watchpoints.\n", bpt
->number
);
7351 bpt
->enable_state
= bp_disabled
;
7352 value_free_to_mark (mark
);
7357 if (save_selected_frame_level
>= 0)
7358 select_frame (save_selected_frame
);
7359 value_free_to_mark (mark
);
7361 if (modify_breakpoint_hook
)
7362 modify_breakpoint_hook (bpt
);
7363 breakpoint_modify_event (bpt
->number
);
7367 enable_breakpoint (struct breakpoint
*bpt
)
7369 do_enable_breakpoint (bpt
, bpt
->disposition
);
7372 /* The enable command enables the specified breakpoints (or all defined
7373 breakpoints) so they once again become (or continue to be) effective
7374 in stopping the inferior. */
7377 enable_command (char *args
, int from_tty
)
7379 struct breakpoint
*bpt
;
7381 ALL_BREAKPOINTS (bpt
)
7385 warning ("attempted to enable apparently deleted breakpoint #%d?",
7390 case bp_catch_unload
:
7392 case bp_catch_vfork
:
7394 case bp_catch_catch
:
7395 case bp_catch_throw
:
7396 case bp_hardware_breakpoint
:
7398 case bp_hardware_watchpoint
:
7399 case bp_read_watchpoint
:
7400 case bp_access_watchpoint
:
7401 enable_breakpoint (bpt
);
7406 map_breakpoint_numbers (args
, enable_breakpoint
);
7410 enable_once_breakpoint (struct breakpoint
*bpt
)
7412 do_enable_breakpoint (bpt
, disp_disable
);
7416 enable_once_command (char *args
, int from_tty
)
7418 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7422 enable_delete_breakpoint (struct breakpoint
*bpt
)
7424 do_enable_breakpoint (bpt
, disp_del
);
7428 enable_delete_command (char *args
, int from_tty
)
7430 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7433 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7435 struct symtabs_and_lines
7436 decode_line_spec_1 (char *string
, int funfirstline
)
7438 struct symtabs_and_lines sals
;
7440 error ("Empty line specification.");
7441 if (default_breakpoint_valid
)
7442 sals
= decode_line_1 (&string
, funfirstline
,
7443 default_breakpoint_symtab
,
7444 default_breakpoint_line
,
7445 (char ***) NULL
, NULL
);
7447 sals
= decode_line_1 (&string
, funfirstline
,
7448 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
7450 error ("Junk at end of line specification: %s", string
);
7455 _initialize_breakpoint (void)
7457 struct cmd_list_element
*c
;
7459 breakpoint_chain
= 0;
7460 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7461 before a breakpoint is set. */
7462 breakpoint_count
= 0;
7464 add_com ("ignore", class_breakpoint
, ignore_command
,
7465 "Set ignore-count of breakpoint number N to COUNT.\n\
7466 Usage is `ignore N COUNT'.");
7468 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
7470 add_com ("commands", class_breakpoint
, commands_command
,
7471 "Set commands to be executed when a breakpoint is hit.\n\
7472 Give breakpoint number as argument after \"commands\".\n\
7473 With no argument, the targeted breakpoint is the last one set.\n\
7474 The commands themselves follow starting on the next line.\n\
7475 Type a line containing \"end\" to indicate the end of them.\n\
7476 Give \"silent\" as the first line to make the breakpoint silent;\n\
7477 then no output is printed when it is hit, except what the commands print.");
7479 add_com ("condition", class_breakpoint
, condition_command
,
7480 "Specify breakpoint number N to break only if COND is true.\n\
7481 Usage is `condition N COND', where N is an integer and COND is an\n\
7482 expression to be evaluated whenever breakpoint N is reached.");
7484 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
,
7485 "Set a temporary breakpoint. Args like \"break\" command.\n\
7486 Like \"break\" except the breakpoint is only temporary,\n\
7487 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7488 by using \"enable delete\" on the breakpoint number.");
7489 set_cmd_completer (c
, location_completer
);
7491 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
,
7492 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7493 Like \"break\" except the breakpoint requires hardware support,\n\
7494 some target hardware may not have this support.");
7495 set_cmd_completer (c
, location_completer
);
7497 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
,
7498 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7499 Like \"hbreak\" except the breakpoint is only temporary,\n\
7500 so it will be deleted when hit.");
7501 set_cmd_completer (c
, location_completer
);
7503 add_prefix_cmd ("enable", class_breakpoint
, enable_command
,
7504 "Enable some breakpoints.\n\
7505 Give breakpoint numbers (separated by spaces) as arguments.\n\
7506 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7507 This is used to cancel the effect of the \"disable\" command.\n\
7508 With a subcommand you can enable temporarily.",
7509 &enablelist
, "enable ", 1, &cmdlist
);
7511 add_com ("ab", class_breakpoint
, enable_command
,
7512 "Enable some breakpoints.\n\
7513 Give breakpoint numbers (separated by spaces) as arguments.\n\
7514 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7515 This is used to cancel the effect of the \"disable\" command.\n\
7516 With a subcommand you can enable temporarily.");
7518 add_com_alias ("en", "enable", class_breakpoint
, 1);
7520 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
,
7521 "Enable some breakpoints.\n\
7522 Give breakpoint numbers (separated by spaces) as arguments.\n\
7523 This is used to cancel the effect of the \"disable\" command.\n\
7524 May be abbreviated to simply \"enable\".\n",
7525 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
7527 add_cmd ("once", no_class
, enable_once_command
,
7528 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7529 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7532 add_cmd ("delete", no_class
, enable_delete_command
,
7533 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7534 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7537 add_cmd ("delete", no_class
, enable_delete_command
,
7538 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7539 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7542 add_cmd ("once", no_class
, enable_once_command
,
7543 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7544 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7547 add_prefix_cmd ("disable", class_breakpoint
, disable_command
,
7548 "Disable some breakpoints.\n\
7549 Arguments are breakpoint numbers with spaces in between.\n\
7550 To disable all breakpoints, give no argument.\n\
7551 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7552 &disablelist
, "disable ", 1, &cmdlist
);
7553 add_com_alias ("dis", "disable", class_breakpoint
, 1);
7554 add_com_alias ("disa", "disable", class_breakpoint
, 1);
7556 add_com ("sb", class_breakpoint
, disable_command
,
7557 "Disable some breakpoints.\n\
7558 Arguments are breakpoint numbers with spaces in between.\n\
7559 To disable all breakpoints, give no argument.\n\
7560 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7562 add_cmd ("breakpoints", class_alias
, disable_command
,
7563 "Disable some breakpoints.\n\
7564 Arguments are breakpoint numbers with spaces in between.\n\
7565 To disable all breakpoints, give no argument.\n\
7566 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7567 This command may be abbreviated \"disable\".",
7570 add_prefix_cmd ("delete", class_breakpoint
, delete_command
,
7571 "Delete some breakpoints or auto-display expressions.\n\
7572 Arguments are breakpoint numbers with spaces in between.\n\
7573 To delete all breakpoints, give no argument.\n\
7575 Also a prefix command for deletion of other GDB objects.\n\
7576 The \"unset\" command is also an alias for \"delete\".",
7577 &deletelist
, "delete ", 1, &cmdlist
);
7578 add_com_alias ("d", "delete", class_breakpoint
, 1);
7580 add_com ("db", class_breakpoint
, delete_command
,
7581 "Delete some breakpoints.\n\
7582 Arguments are breakpoint numbers with spaces in between.\n\
7583 To delete all breakpoints, give no argument.\n");
7585 add_cmd ("breakpoints", class_alias
, delete_command
,
7586 "Delete some breakpoints or auto-display expressions.\n\
7587 Arguments are breakpoint numbers with spaces in between.\n\
7588 To delete all breakpoints, give no argument.\n\
7589 This command may be abbreviated \"delete\".",
7592 add_com ("clear", class_breakpoint
, clear_command
,
7593 concat ("Clear breakpoint at specified line or function.\n\
7594 Argument may be line number, function name, or \"*\" and an address.\n\
7595 If line number is specified, all breakpoints in that line are cleared.\n\
7596 If function is specified, breakpoints at beginning of function are cleared.\n\
7597 If an address is specified, breakpoints at that address are cleared.\n\n",
7598 "With no argument, clears all breakpoints in the line that the selected frame\n\
7601 See also the \"delete\" command which clears breakpoints by number.", NULL
));
7603 c
= add_com ("break", class_breakpoint
, break_command
,
7604 concat ("Set breakpoint at specified line or function.\n\
7605 Argument may be line number, function name, or \"*\" and an address.\n\
7606 If line number is specified, break at start of code for that line.\n\
7607 If function is specified, break at start of code for that function.\n\
7608 If an address is specified, break at that exact address.\n",
7609 "With no arg, uses current execution address of selected stack frame.\n\
7610 This is useful for breaking on return to a stack frame.\n\
7612 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7614 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL
));
7615 set_cmd_completer (c
, location_completer
);
7617 add_com_alias ("b", "break", class_run
, 1);
7618 add_com_alias ("br", "break", class_run
, 1);
7619 add_com_alias ("bre", "break", class_run
, 1);
7620 add_com_alias ("brea", "break", class_run
, 1);
7624 add_com_alias ("ba", "break", class_breakpoint
, 1);
7625 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
7630 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
,
7631 "Break in function/address or break at a line in the current file.",
7632 &stoplist
, "stop ", 1, &cmdlist
);
7633 add_cmd ("in", class_breakpoint
, stopin_command
,
7634 "Break in function or address.\n", &stoplist
);
7635 add_cmd ("at", class_breakpoint
, stopat_command
,
7636 "Break at a line in the current file.\n", &stoplist
);
7637 add_com ("status", class_info
, breakpoints_info
,
7638 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7639 The \"Type\" column indicates one of:\n\
7640 \tbreakpoint - normal breakpoint\n\
7641 \twatchpoint - watchpoint\n\
7642 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7643 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7644 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7645 address and file/line number respectively.\n\n",
7646 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7647 are set to the address of the last breakpoint listed.\n\n\
7648 Convenience variable \"$bpnum\" contains the number of the last\n\
7649 breakpoint set.", NULL
));
7652 add_info ("breakpoints", breakpoints_info
,
7653 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7654 The \"Type\" column indicates one of:\n\
7655 \tbreakpoint - normal breakpoint\n\
7656 \twatchpoint - watchpoint\n\
7657 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7658 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7659 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7660 address and file/line number respectively.\n\n",
7661 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7662 are set to the address of the last breakpoint listed.\n\n\
7663 Convenience variable \"$bpnum\" contains the number of the last\n\
7664 breakpoint set.", NULL
));
7667 add_com ("lb", class_breakpoint
, breakpoints_info
,
7668 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7669 The \"Type\" column indicates one of:\n\
7670 \tbreakpoint - normal breakpoint\n\
7671 \twatchpoint - watchpoint\n\
7672 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7673 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7674 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7675 address and file/line number respectively.\n\n",
7676 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7677 are set to the address of the last breakpoint listed.\n\n\
7678 Convenience variable \"$bpnum\" contains the number of the last\n\
7679 breakpoint set.", NULL
));
7681 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
,
7682 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7683 The \"Type\" column indicates one of:\n\
7684 \tbreakpoint - normal breakpoint\n\
7685 \twatchpoint - watchpoint\n\
7686 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7687 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7688 \tuntil - internal breakpoint used by the \"until\" command\n\
7689 \tfinish - internal breakpoint used by the \"finish\" command\n",
7690 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7691 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7692 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7693 address and file/line number respectively.\n\n",
7694 "Convenience variable \"$_\" 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
),
7698 &maintenanceinfolist
);
7700 add_com ("catch", class_breakpoint
, catch_command
,
7701 "Set catchpoints to catch events.\n\
7702 Raised signals may be caught:\n\
7703 \tcatch signal - all signals\n\
7704 \tcatch signal <signame> - a particular signal\n\
7705 Raised exceptions may be caught:\n\
7706 \tcatch throw - all exceptions, when thrown\n\
7707 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7708 \tcatch catch - all exceptions, when caught\n\
7709 \tcatch catch <exceptname> - a particular exception, when caught\n\
7710 Thread or process events may be caught:\n\
7711 \tcatch thread_start - any threads, just after creation\n\
7712 \tcatch thread_exit - any threads, just before expiration\n\
7713 \tcatch thread_join - any threads, just after joins\n\
7714 Process events may be caught:\n\
7715 \tcatch start - any processes, just after creation\n\
7716 \tcatch exit - any processes, just before expiration\n\
7717 \tcatch fork - calls to fork()\n\
7718 \tcatch vfork - calls to vfork()\n\
7719 \tcatch exec - calls to exec()\n\
7720 Dynamically-linked library events may be caught:\n\
7721 \tcatch load - loads of any library\n\
7722 \tcatch load <libname> - loads of a particular library\n\
7723 \tcatch unload - unloads of any library\n\
7724 \tcatch unload <libname> - unloads of a particular library\n\
7725 The act of your program's execution stopping may also be caught:\n\
7727 C++ exceptions may be caught:\n\
7728 \tcatch throw - all exceptions, when thrown\n\
7729 \tcatch catch - all exceptions, when caught\n\
7731 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7732 after a fork or vfork is caught.\n\n\
7733 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7735 add_com ("tcatch", class_breakpoint
, tcatch_command
,
7736 "Set temporary catchpoints to catch events.\n\
7737 Args like \"catch\" command.\n\
7738 Like \"catch\" except the catchpoint is only temporary,\n\
7739 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7740 by using \"enable delete\" on the catchpoint number.");
7742 c
= add_com ("watch", class_breakpoint
, watch_command
,
7743 "Set a watchpoint for an expression.\n\
7744 A watchpoint stops execution of your program whenever the value of\n\
7745 an expression changes.");
7746 set_cmd_completer (c
, location_completer
);
7748 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
,
7749 "Set a read watchpoint for an expression.\n\
7750 A watchpoint stops execution of your program whenever the value of\n\
7751 an expression is read.");
7752 set_cmd_completer (c
, location_completer
);
7754 c
= add_com ("awatch", class_breakpoint
, awatch_command
,
7755 "Set a watchpoint for an expression.\n\
7756 A watchpoint stops execution of your program whenever the value of\n\
7757 an expression is either read or written.");
7758 set_cmd_completer (c
, location_completer
);
7760 add_info ("watchpoints", breakpoints_info
,
7761 "Synonym for ``info breakpoints''.");
7764 c
= add_set_cmd ("can-use-hw-watchpoints", class_support
, var_zinteger
,
7765 (char *) &can_use_hw_watchpoints
,
7766 "Set debugger's willingness to use watchpoint hardware.\n\
7767 If zero, gdb will not use hardware for new watchpoints, even if\n\
7768 such is available. (However, any hardware watchpoints that were\n\
7769 created before setting this to nonzero, will continue to use watchpoint\n\
7772 add_show_from_set (c
, &showlist
);
7774 can_use_hw_watchpoints
= 1;