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"
55 #include "gdb-events.h"
57 /* Prototypes for local functions. */
59 static void until_break_command_continuation (struct continuation_arg
*arg
);
61 static void catch_command_1 (char *, int, int);
63 static void enable_delete_command (char *, int);
65 static void enable_delete_breakpoint (struct breakpoint
*);
67 static void enable_once_command (char *, int);
69 static void enable_once_breakpoint (struct breakpoint
*);
71 static void disable_command (char *, int);
73 static void enable_command (char *, int);
75 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
77 static void ignore_command (char *, int);
79 static int breakpoint_re_set_one (void *);
81 static void clear_command (char *, int);
83 static void catch_command (char *, int);
85 static void watch_command (char *, int);
87 static int can_use_hardware_watchpoint (struct value
*);
89 extern void break_at_finish_command (char *, int);
90 extern void break_at_finish_at_depth_command (char *, int);
92 extern void tbreak_at_finish_command (char *, int);
94 static int break_command_1 (char *, int, int, struct breakpoint
*);
96 static void mention (struct breakpoint
*);
98 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
100 static void check_duplicates (struct breakpoint
*);
102 static void breakpoint_adjustment_warning (CORE_ADDR
, CORE_ADDR
, int, int);
104 static CORE_ADDR
adjust_breakpoint_address (CORE_ADDR bpaddr
,
107 static void describe_other_breakpoints (CORE_ADDR
, asection
*);
109 static void breakpoints_info (char *, int);
111 static void breakpoint_1 (int, int);
113 static bpstat
bpstat_alloc (struct breakpoint
*, bpstat
);
115 static int breakpoint_cond_eval (void *);
117 static void cleanup_executing_breakpoints (void *);
119 static void commands_command (char *, int);
121 static void condition_command (char *, int);
123 static int get_number_trailer (char **, int);
125 static int do_captured_parse_breakpoint (struct ui_out
*, void *);
127 void set_breakpoint_count (int);
136 static int remove_breakpoint (struct bp_location
*, insertion_state_t
);
138 static enum print_stop_action
print_it_typical (bpstat
);
140 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
144 enum exception_event_kind kind
;
147 args_for_catchpoint_enable
;
149 static int watchpoint_check (void *);
151 static int cover_target_enable_exception_callback (void *);
153 static void maintenance_info_breakpoints (char *, int);
155 static void create_longjmp_breakpoint (char *);
157 static void create_overlay_event_breakpoint (char *);
159 static int hw_breakpoint_used_count (void);
161 static int hw_watchpoint_used_count (enum bptype
, int *);
163 static void hbreak_command (char *, int);
165 static void thbreak_command (char *, int);
167 static void watch_command_1 (char *, int, int);
169 static void rwatch_command (char *, int);
171 static void awatch_command (char *, int);
173 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
175 static void solib_load_unload_1 (char *hookname
,
178 char *cond_string
, enum bptype bp_kind
);
180 static void create_fork_vfork_event_catchpoint (int tempflag
,
182 enum bptype bp_kind
);
184 static void break_at_finish_at_depth_command_1 (char *arg
,
185 int flag
, int from_tty
);
187 static void break_at_finish_command_1 (char *arg
, int flag
, int from_tty
);
189 static void stop_command (char *arg
, int from_tty
);
191 static void stopin_command (char *arg
, int from_tty
);
193 static void stopat_command (char *arg
, int from_tty
);
195 static char *ep_find_event_name_end (char *arg
);
197 static char *ep_parse_optional_if_clause (char **arg
);
199 static char *ep_parse_optional_filename (char **arg
);
201 static void create_exception_catchpoint (int tempflag
, char *cond_string
,
202 enum exception_event_kind ex_event
,
203 struct symtab_and_line
*sal
);
205 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
206 char *arg
, int tempflag
, int from_tty
);
208 static void tcatch_command (char *arg
, int from_tty
);
210 static void ep_skip_leading_whitespace (char **s
);
212 /* Prototypes for exported functions. */
214 /* If FALSE, gdb will not use hardware support for watchpoints, even
215 if such is available. */
216 static int can_use_hw_watchpoints
;
218 /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints.
219 If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints
220 for unrecognized breakpoint locations.
221 If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */
222 static enum auto_boolean pending_break_support
;
224 void _initialize_breakpoint (void);
226 extern int addressprint
; /* Print machine addresses? */
228 /* Are we executing breakpoint commands? */
229 static int executing_breakpoint_commands
;
231 /* Are overlay event breakpoints enabled? */
232 static int overlay_events_enabled
;
234 /* Walk the following statement or block through all breakpoints.
235 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
238 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
240 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
241 for (B = breakpoint_chain; \
242 B ? (TMP=B->next, 1): 0; \
245 /* Similar iterators for the low-level breakpoints. */
247 #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->next)
249 #define ALL_BP_LOCATIONS_SAFE(B,TMP) \
250 for (B = bp_location_chain; \
251 B ? (TMP=B->next, 1): 0; \
254 /* True if breakpoint hit counts should be displayed in breakpoint info. */
256 int show_breakpoint_hit_counts
= 1;
258 /* Chains of all breakpoints defined. */
260 struct breakpoint
*breakpoint_chain
;
262 struct bp_location
*bp_location_chain
;
264 /* Number of last breakpoint made. */
266 int breakpoint_count
;
268 /* Pointer to current exception event record */
269 static struct exception_event_record
*current_exception_event
;
271 /* Indicator of whether exception catchpoints should be nuked between
272 runs of a program. */
273 int deprecated_exception_catchpoints_are_fragile
= 0;
275 /* Indicator of when exception catchpoints set-up should be
276 reinitialized -- e.g. when program is re-run. */
277 int deprecated_exception_support_initialized
= 0;
279 /* This function returns a pointer to the string representation of the
280 pathname of the dynamically-linked library that has just been
283 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
284 or undefined results are guaranteed.
286 This string's contents are only valid immediately after the
287 inferior has stopped in the dynamic linker hook, and becomes
288 invalid as soon as the inferior is continued. Clients should make
289 a copy of this string if they wish to continue the inferior and
290 then access the string. */
292 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
293 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
296 /* This function returns a pointer to the string representation of the
297 pathname of the dynamically-linked library that has just been
300 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
301 TRUE, or undefined results are guaranteed.
303 This string's contents are only valid immediately after the
304 inferior has stopped in the dynamic linker hook, and becomes
305 invalid as soon as the inferior is continued. Clients should make
306 a copy of this string if they wish to continue the inferior and
307 then access the string. */
309 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
310 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
313 /* This function is called by the "catch load" command. It allows the
314 debugger to be notified by the dynamic linker when a specified
315 library file (or any library file, if filename is NULL) is loaded. */
317 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
318 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
319 error ("catch of library loads not yet implemented on this platform")
322 /* This function is called by the "catch unload" command. It allows
323 the debugger to be notified by the dynamic linker when a specified
324 library file (or any library file, if filename is NULL) is
327 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
328 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \
329 error ("catch of library unloads not yet implemented on this platform")
332 /* Return whether a breakpoint is an active enabled breakpoint. */
334 breakpoint_enabled (struct breakpoint
*b
)
336 return (b
->enable_state
== bp_enabled
&& !b
->pending
);
339 /* Set breakpoint count to NUM. */
342 set_breakpoint_count (int num
)
344 breakpoint_count
= num
;
345 set_internalvar (lookup_internalvar ("bpnum"),
346 value_from_longest (builtin_type_int
, (LONGEST
) num
));
349 /* Used in run_command to zero the hit count when a new run starts. */
352 clear_breakpoint_hit_counts (void)
354 struct breakpoint
*b
;
360 /* Default address, symtab and line to put a breakpoint at
361 for "break" command with no arg.
362 if default_breakpoint_valid is zero, the other three are
363 not valid, and "break" with no arg is an error.
365 This set by print_stack_frame, which calls set_default_breakpoint. */
367 int default_breakpoint_valid
;
368 CORE_ADDR default_breakpoint_address
;
369 struct symtab
*default_breakpoint_symtab
;
370 int default_breakpoint_line
;
372 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
373 Advance *PP after the string and any trailing whitespace.
375 Currently the string can either be a number or "$" followed by the name
376 of a convenience variable. Making it an expression wouldn't work well
377 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
379 TRAILER is a character which can be found after the number; most
380 commonly this is `-'. If you don't want a trailer, use \0. */
382 get_number_trailer (char **pp
, int trailer
)
384 int retval
= 0; /* default */
388 /* Empty line means refer to the last breakpoint. */
389 return breakpoint_count
;
392 /* Make a copy of the name, so we can null-terminate it
393 to pass to lookup_internalvar(). */
398 while (isalnum (*p
) || *p
== '_')
400 varname
= (char *) alloca (p
- start
+ 1);
401 strncpy (varname
, start
, p
- start
);
402 varname
[p
- start
] = '\0';
403 val
= value_of_internalvar (lookup_internalvar (varname
));
404 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_INT
)
405 retval
= (int) value_as_long (val
);
408 printf_filtered ("Convenience variable must have integer value.\n");
416 while (*p
>= '0' && *p
<= '9')
419 /* There is no number here. (e.g. "cond a == b"). */
421 /* Skip non-numeric token */
422 while (*p
&& !isspace((int) *p
))
424 /* Return zero, which caller must interpret as error. */
430 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
432 /* Trailing junk: return 0 and let caller print error msg. */
433 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
444 /* Like get_number_trailer, but don't allow a trailer. */
446 get_number (char **pp
)
448 return get_number_trailer (pp
, '\0');
451 /* Parse a number or a range.
452 * A number will be of the form handled by get_number.
453 * A range will be of the form <number1> - <number2>, and
454 * will represent all the integers between number1 and number2,
457 * While processing a range, this fuction is called iteratively;
458 * At each call it will return the next value in the range.
460 * At the beginning of parsing a range, the char pointer PP will
461 * be advanced past <number1> and left pointing at the '-' token.
462 * Subsequent calls will not advance the pointer until the range
463 * is completed. The call that completes the range will advance
464 * pointer PP past <number2>.
468 get_number_or_range (char **pp
)
470 static int last_retval
, end_value
;
471 static char *end_ptr
;
472 static int in_range
= 0;
476 /* Default case: pp is pointing either to a solo number,
477 or to the first number of a range. */
478 last_retval
= get_number_trailer (pp
, '-');
483 /* This is the start of a range (<number1> - <number2>).
484 Skip the '-', parse and remember the second number,
485 and also remember the end of the final token. */
489 while (isspace ((int) *end_ptr
))
490 end_ptr
++; /* skip white space */
491 end_value
= get_number (temp
);
492 if (end_value
< last_retval
)
494 error ("inverted range");
496 else if (end_value
== last_retval
)
498 /* degenerate range (number1 == number2). Advance the
499 token pointer so that the range will be treated as a
508 error ("negative value");
511 /* pp points to the '-' that betokens a range. All
512 number-parsing has already been done. Return the next
513 integer value (one greater than the saved previous value).
514 Do not advance the token pointer 'pp' until the end of range
517 if (++last_retval
== end_value
)
519 /* End of range reached; advance token pointer. */
529 /* condition N EXP -- set break condition of breakpoint N to EXP. */
532 condition_command (char *arg
, int from_tty
)
534 struct breakpoint
*b
;
539 error_no_arg ("breakpoint number");
542 bnum
= get_number (&p
);
544 error ("Bad breakpoint argument: '%s'", arg
);
547 if (b
->number
== bnum
)
554 if (b
->cond_string
!= NULL
)
555 xfree (b
->cond_string
);
560 b
->cond_string
= NULL
;
562 printf_filtered ("Breakpoint %d now unconditional.\n", bnum
);
567 /* I don't know if it matters whether this is the string the user
568 typed in or the decompiled expression. */
569 b
->cond_string
= savestring (arg
, strlen (arg
));
572 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->loc
->address
), 0);
574 error ("Junk at end of expression");
577 breakpoints_changed ();
578 breakpoint_modify_event (b
->number
);
582 error ("No breakpoint number %d.", bnum
);
586 commands_command (char *arg
, int from_tty
)
588 struct breakpoint
*b
;
591 struct command_line
*l
;
593 /* If we allowed this, we would have problems with when to
594 free the storage, if we change the commands currently
597 if (executing_breakpoint_commands
)
598 error ("Can't use the \"commands\" command among a breakpoint's commands.");
601 bnum
= get_number (&p
);
604 error ("Unexpected extra arguments following breakpoint number.");
607 if (b
->number
== bnum
)
609 char *tmpbuf
= xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
611 struct cleanup
*cleanups
= make_cleanup (xfree
, tmpbuf
);
612 l
= read_command_lines (tmpbuf
, from_tty
);
613 do_cleanups (cleanups
);
614 free_command_lines (&b
->commands
);
616 breakpoints_changed ();
617 breakpoint_modify_event (b
->number
);
620 error ("No breakpoint number %d.", bnum
);
623 /* Like target_read_memory() but if breakpoints are inserted, return
624 the shadow contents instead of the breakpoints themselves.
626 Read "memory data" from whatever target or inferior we have.
627 Returns zero if successful, errno value if not. EIO is used
628 for address out of bounds. If breakpoints are inserted, returns
629 shadow contents, not the breakpoints themselves. From breakpoint.c. */
632 deprecated_read_memory_nobpt (CORE_ADDR memaddr
, char *myaddr
, unsigned len
)
635 struct bp_location
*b
;
636 CORE_ADDR bp_addr
= 0;
639 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
640 /* No breakpoints on this machine. */
641 return target_read_memory (memaddr
, myaddr
, len
);
645 if (b
->owner
->type
== bp_none
)
646 warning ("reading through apparently deleted breakpoint #%d?",
649 if (b
->loc_type
!= bp_loc_software_breakpoint
)
653 /* Addresses and length of the part of the breakpoint that
655 /* XXXX The m68k, sh and h8300 have different local and remote
656 breakpoint values. BREAKPOINT_FROM_PC still manages to
657 correctly determine the breakpoints memory address and size
658 for these targets. */
659 bp_addr
= b
->address
;
661 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
666 if (bp_addr
+ bp_size
<= memaddr
)
667 /* The breakpoint is entirely before the chunk of memory we
670 if (bp_addr
>= memaddr
+ len
)
671 /* The breakpoint is entirely after the chunk of memory we are
674 /* Copy the breakpoint from the shadow contents, and recurse for
675 the things before and after. */
677 /* Offset within shadow_contents. */
680 if (bp_addr
< memaddr
)
682 /* Only copy the second part of the breakpoint. */
683 bp_size
-= memaddr
- bp_addr
;
684 bptoffset
= memaddr
- bp_addr
;
688 if (bp_addr
+ bp_size
> memaddr
+ len
)
690 /* Only copy the first part of the breakpoint. */
691 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
694 memcpy (myaddr
+ bp_addr
- memaddr
,
695 b
->shadow_contents
+ bptoffset
, bp_size
);
697 if (bp_addr
> memaddr
)
699 /* Copy the section of memory before the breakpoint. */
700 status
= deprecated_read_memory_nobpt (memaddr
, myaddr
, bp_addr
- memaddr
);
705 if (bp_addr
+ bp_size
< memaddr
+ len
)
707 /* Copy the section of memory after the breakpoint. */
708 status
= deprecated_read_memory_nobpt (bp_addr
+ bp_size
,
709 myaddr
+ bp_addr
+ bp_size
- memaddr
,
710 memaddr
+ len
- (bp_addr
+ bp_size
));
717 /* Nothing overlaps. Just call read_memory_noerr. */
718 return target_read_memory (memaddr
, myaddr
, len
);
722 /* A wrapper function for inserting catchpoints. */
724 insert_catchpoint (struct ui_out
*uo
, void *args
)
726 struct breakpoint
*b
= (struct breakpoint
*) args
;
732 val
= target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
735 val
= target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
738 val
= target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
741 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
746 throw_exception (RETURN_ERROR
);
751 /* Helper routine: free the value chain for a breakpoint (watchpoint). */
753 static void free_valchain (struct bp_location
*b
)
758 /* Free the saved value chain. We will construct a new one
759 the next time the watchpoint is inserted. */
760 for (v
= b
->owner
->val_chain
; v
; v
= n
)
765 b
->owner
->val_chain
= NULL
;
768 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
769 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
770 PROCESS_WARNING, and HW_BREAKPOINT_ERROR are used to report problems.
772 NOTE drow/2003-09-09: This routine could be broken down to an object-style
773 method for each breakpoint or catchpoint type. */
775 insert_bp_location (struct bp_location
*bpt
,
776 struct ui_file
*tmp_error_stream
,
777 int *disabled_breaks
, int *process_warning
,
778 int *hw_breakpoint_error
)
782 /* Permanent breakpoints cannot be inserted or removed. Disabled
783 breakpoints should not be inserted. */
784 if (!breakpoint_enabled (bpt
->owner
))
787 if (bpt
->inserted
|| bpt
->duplicate
)
790 if (bpt
->loc_type
== bp_loc_software_breakpoint
791 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
793 /* First check to see if we have to handle an overlay. */
794 if (overlay_debugging
== ovly_off
795 || bpt
->section
== NULL
796 || !(section_is_overlay (bpt
->section
)))
798 /* No overlay handling: just set the breakpoint. */
800 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
801 val
= target_insert_hw_breakpoint (bpt
->address
,
802 bpt
->shadow_contents
);
804 val
= target_insert_breakpoint (bpt
->address
,
805 bpt
->shadow_contents
);
809 /* This breakpoint is in an overlay section.
810 Shall we set a breakpoint at the LMA? */
811 if (!overlay_events_enabled
)
813 /* Yes -- overlay event support is not active,
814 so we must try to set a breakpoint at the LMA.
815 This will not work for a hardware breakpoint. */
816 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
817 warning ("hardware breakpoint %d not supported in overlay!\n",
821 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
823 /* Set a software (trap) breakpoint at the LMA. */
824 val
= target_insert_breakpoint (addr
, bpt
->shadow_contents
);
826 fprintf_unfiltered (tmp_error_stream
,
827 "Overlay breakpoint %d failed: in ROM?",
831 /* Shall we set a breakpoint at the VMA? */
832 if (section_is_mapped (bpt
->section
))
834 /* Yes. This overlay section is mapped into memory. */
835 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
836 val
= target_insert_hw_breakpoint (bpt
->address
,
837 bpt
->shadow_contents
);
839 val
= target_insert_breakpoint (bpt
->address
,
840 bpt
->shadow_contents
);
844 /* No. This breakpoint will not be inserted.
845 No error, but do not mark the bp as 'inserted'. */
852 /* Can't set the breakpoint. */
853 #if defined (DISABLE_UNSETTABLE_BREAK)
854 if (DISABLE_UNSETTABLE_BREAK (bpt
->address
))
856 /* See also: disable_breakpoints_in_shlibs. */
858 bpt
->owner
->enable_state
= bp_shlib_disabled
;
859 if (!*disabled_breaks
)
861 fprintf_unfiltered (tmp_error_stream
,
862 "Cannot insert breakpoint %d.\n",
864 fprintf_unfiltered (tmp_error_stream
,
865 "Temporarily disabling shared library breakpoints:\n");
867 *disabled_breaks
= 1;
868 fprintf_unfiltered (tmp_error_stream
,
869 "breakpoint #%d\n", bpt
->owner
->number
);
874 #ifdef ONE_PROCESS_WRITETEXT
875 *process_warning
= 1;
877 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
879 *hw_breakpoint_error
= 1;
880 fprintf_unfiltered (tmp_error_stream
,
881 "Cannot insert hardware breakpoint %d.\n",
886 fprintf_unfiltered (tmp_error_stream
,
887 "Cannot insert breakpoint %d.\n",
889 fprintf_filtered (tmp_error_stream
,
890 "Error accessing memory address ");
891 print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
892 fprintf_filtered (tmp_error_stream
, ": %s.\n",
893 safe_strerror (val
));
904 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
905 /* NOTE drow/2003-09-08: This state only exists for removing
906 watchpoints. It's not clear that it's necessary... */
907 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
909 /* FIXME drow/2003-09-08: This code sets multiple hardware watchpoints
910 based on the expression. Ideally this should happen at a higher level,
911 and there should be one bp_location for each computed address we
912 must watch. As soon as a many-to-one mapping is available I'll
915 int within_current_scope
;
916 struct value
*mark
= value_mark ();
918 struct frame_id saved_frame_id
;
920 /* Save the current frame's ID so we can restore it after
921 evaluating the watchpoint expression on its own frame. */
922 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
923 took a frame parameter, so that we didn't have to change the
925 saved_frame_id
= get_frame_id (deprecated_selected_frame
);
927 /* Determine if the watchpoint is within scope. */
928 if (bpt
->owner
->exp_valid_block
== NULL
)
929 within_current_scope
= 1;
932 struct frame_info
*fi
;
933 fi
= frame_find_by_id (bpt
->owner
->watchpoint_frame
);
934 within_current_scope
= (fi
!= NULL
);
935 if (within_current_scope
)
939 if (within_current_scope
)
943 /* Evaluate the expression and cut the chain of values
944 produced off from the value chain.
946 Make sure the value returned isn't lazy; we use
947 laziness to determine what memory GDB actually needed
948 in order to compute the value of the expression. */
949 v
= evaluate_expression (bpt
->owner
->exp
);
951 value_release_to_mark (mark
);
953 bpt
->owner
->val_chain
= v
;
956 /* Look at each value on the value chain. */
957 for (; v
; v
= v
->next
)
959 /* If it's a memory location, and GDB actually needed
960 its contents to evaluate the expression, then we
962 if (VALUE_LVAL (v
) == lval_memory
965 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
967 /* We only watch structs and arrays if user asked
968 for it explicitly, never if they just happen to
969 appear in the middle of some value chain. */
970 if (v
== bpt
->owner
->val_chain
971 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
972 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
977 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
978 len
= TYPE_LENGTH (VALUE_TYPE (v
));
980 if (bpt
->owner
->type
== bp_read_watchpoint
)
982 else if (bpt
->owner
->type
== bp_access_watchpoint
)
985 val
= target_insert_watchpoint (addr
, len
, type
);
988 /* Don't exit the loop, try to insert
989 every value on the value chain. That's
990 because we will be removing all the
991 watches below, and removing a
992 watchpoint we didn't insert could have
1000 /* Failure to insert a watchpoint on any memory value in the
1001 value chain brings us here. */
1004 remove_breakpoint (bpt
, mark_uninserted
);
1005 *hw_breakpoint_error
= 1;
1006 fprintf_unfiltered (tmp_error_stream
,
1007 "Could not insert hardware watchpoint %d.\n",
1008 bpt
->owner
->number
);
1014 printf_filtered ("Hardware watchpoint %d deleted ", bpt
->owner
->number
);
1015 printf_filtered ("because the program has left the block \n");
1016 printf_filtered ("in which its expression is valid.\n");
1017 if (bpt
->owner
->related_breakpoint
)
1018 bpt
->owner
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1019 bpt
->owner
->disposition
= disp_del_at_next_stop
;
1022 /* Restore the selected frame. */
1023 select_frame (frame_find_by_id (saved_frame_id
));
1028 else if (ep_is_exception_catchpoint (bpt
->owner
))
1030 /* FIXME drow/2003-09-09: This code sets both a catchpoint and a
1031 breakpoint. Once again, it would be better if this was represented
1032 as two bp_locations. */
1034 /* If we get here, we must have a callback mechanism for exception
1035 events -- with g++ style embedded label support, we insert
1036 ordinary breakpoints and not catchpoints. */
1037 val
= target_insert_breakpoint (bpt
->address
, bpt
->shadow_contents
);
1040 /* Couldn't set breakpoint for some reason */
1041 fprintf_unfiltered (tmp_error_stream
,
1042 "Cannot insert catchpoint %d; disabling it.\n",
1043 bpt
->owner
->number
);
1044 fprintf_filtered (tmp_error_stream
,
1045 "Error accessing memory address ");
1046 print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
1047 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1048 safe_strerror (val
));
1049 bpt
->owner
->enable_state
= bp_disabled
;
1053 /* Bp set, now make sure callbacks are enabled */
1054 /* Format possible error msg */
1055 char *message
= xstrprintf ("Error inserting catchpoint %d:\n",
1056 bpt
->owner
->number
);
1057 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
1059 args_for_catchpoint_enable args
;
1060 args
.kind
= bpt
->owner
->type
== bp_catch_catch
?
1061 EX_EVENT_CATCH
: EX_EVENT_THROW
;
1063 val
= catch_errors (cover_target_enable_exception_callback
,
1064 &args
, message
, RETURN_MASK_ALL
);
1065 do_cleanups (cleanups
);
1066 if (val
!= 0 && val
!= -1)
1069 /* Check if something went wrong; val == 0 can be ignored */
1072 /* something went wrong */
1073 fprintf_unfiltered (tmp_error_stream
,
1074 "Cannot insert catchpoint %d; disabling it.\n",
1075 bpt
->owner
->number
);
1076 bpt
->owner
->enable_state
= bp_disabled
;
1083 else if (bpt
->owner
->type
== bp_catch_fork
1084 || bpt
->owner
->type
== bp_catch_vfork
1085 || bpt
->owner
->type
== bp_catch_exec
)
1087 char *prefix
= xstrprintf ("warning: inserting catchpoint %d: ",
1088 bpt
->owner
->number
);
1089 struct cleanup
*cleanups
= make_cleanup (xfree
, prefix
);
1090 val
= catch_exceptions (uiout
, insert_catchpoint
, bpt
->owner
, prefix
,
1092 do_cleanups (cleanups
);
1094 bpt
->owner
->enable_state
= bp_disabled
;
1098 /* We've already printed an error message if there was a problem
1099 inserting this catchpoint, and we've disabled the catchpoint,
1100 so just return success. */
1107 /* insert_breakpoints is used when starting or continuing the program.
1108 remove_breakpoints is used when the program stops.
1109 Both return zero if successful,
1110 or an `errno' value if could not write the inferior. */
1113 insert_breakpoints (void)
1115 struct bp_location
*b
, *temp
;
1116 int return_val
= 0; /* return success code. */
1118 int disabled_breaks
= 0;
1119 int hw_breakpoint_error
= 0;
1120 int process_warning
= 0;
1122 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1123 make_cleanup_ui_file_delete (tmp_error_stream
);
1125 /* Explicitly mark the warning -- this will only be printed if
1126 there was an error. */
1127 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1129 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1131 /* Permanent breakpoints cannot be inserted or removed. Disabled
1132 breakpoints should not be inserted. */
1133 if (!breakpoint_enabled (b
->owner
))
1136 /* FIXME drow/2003-10-07: This code should be pushed elsewhere when
1137 hardware watchpoints are split into multiple loc breakpoints. */
1138 if ((b
->loc_type
== bp_loc_hardware_watchpoint
1139 || b
->owner
->type
== bp_watchpoint
) && !b
->owner
->val
)
1142 val
= evaluate_expression (b
->owner
->exp
);
1143 release_value (val
);
1144 if (VALUE_LAZY (val
))
1145 value_fetch_lazy (val
);
1146 b
->owner
->val
= val
;
1149 val
= insert_bp_location (b
, tmp_error_stream
,
1150 &disabled_breaks
, &process_warning
,
1151 &hw_breakpoint_error
);
1158 /* If a hardware breakpoint or watchpoint was inserted, add a
1159 message about possibly exhausted resources. */
1160 if (hw_breakpoint_error
)
1162 fprintf_unfiltered (tmp_error_stream
,
1163 "Could not insert hardware breakpoints:\n\
1164 You may have requested too many hardware breakpoints/watchpoints.\n");
1166 #ifdef ONE_PROCESS_WRITETEXT
1167 if (process_warning
)
1168 fprintf_unfiltered (tmp_error_stream
,
1169 "The same program may be running in another process.");
1171 target_terminal_ours_for_output ();
1172 error_stream (tmp_error_stream
);
1178 remove_breakpoints (void)
1180 struct bp_location
*b
;
1183 ALL_BP_LOCATIONS (b
)
1187 val
= remove_breakpoint (b
, mark_uninserted
);
1196 remove_hw_watchpoints (void)
1198 struct bp_location
*b
;
1201 ALL_BP_LOCATIONS (b
)
1203 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1205 val
= remove_breakpoint (b
, mark_uninserted
);
1214 reattach_breakpoints (int pid
)
1216 struct bp_location
*b
;
1218 struct cleanup
*old_chain
= save_inferior_ptid ();
1220 /* Set inferior_ptid; remove_breakpoint uses this global. */
1221 inferior_ptid
= pid_to_ptid (pid
);
1222 ALL_BP_LOCATIONS (b
)
1226 remove_breakpoint (b
, mark_inserted
);
1227 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1228 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
1230 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
1231 /* FIXME drow/2003-10-07: This doesn't handle any other kinds of
1232 breakpoints. It's wrong for watchpoints, for example. */
1235 do_cleanups (old_chain
);
1240 do_cleanups (old_chain
);
1245 update_breakpoints_after_exec (void)
1247 struct breakpoint
*b
;
1248 struct breakpoint
*temp
;
1250 /* Doing this first prevents the badness of having delete_breakpoint()
1251 write a breakpoint's current "shadow contents" to lift the bp. That
1252 shadow is NOT valid after an exec()! */
1253 mark_breakpoints_out ();
1255 ALL_BREAKPOINTS_SAFE (b
, temp
)
1257 /* Solib breakpoints must be explicitly reset after an exec(). */
1258 if (b
->type
== bp_shlib_event
)
1260 delete_breakpoint (b
);
1264 /* Thread event breakpoints must be set anew after an exec(),
1265 as must overlay event breakpoints. */
1266 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1268 delete_breakpoint (b
);
1272 /* Step-resume breakpoints are meaningless after an exec(). */
1273 if (b
->type
== bp_step_resume
)
1275 delete_breakpoint (b
);
1279 /* Ditto the sigtramp handler breakpoints. */
1280 if (b
->type
== bp_through_sigtramp
)
1282 delete_breakpoint (b
);
1286 /* Ditto the exception-handling catchpoints. */
1287 if ((b
->type
== bp_catch_catch
) || (b
->type
== bp_catch_throw
))
1289 delete_breakpoint (b
);
1293 /* Don't delete an exec catchpoint, because else the inferior
1294 won't stop when it ought!
1296 Similarly, we probably ought to keep vfork catchpoints, 'cause
1297 on this target, we may not be able to stop when the vfork is
1298 seen, but only when the subsequent exec is seen. (And because
1299 deleting fork catchpoints here but not vfork catchpoints will
1300 seem mysterious to users, keep those too.)
1302 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1303 target address field, if any, is sufficient to have it be reset
1304 automagically. Certainly on HP-UX that's true.
1306 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1307 valid code address on some platforms (like the mn10300
1308 simulators). We shouldn't assign any special interpretation to
1309 a breakpoint with a zero address. And in fact, GDB doesn't ---
1310 I can't see what that comment above is talking about. As far
1311 as I can tell, setting the address of a
1312 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1313 is meaningless, since those are implemented with HP-UX kernel
1314 hackery, not by storing breakpoint instructions somewhere. */
1315 if ((b
->type
== bp_catch_exec
) ||
1316 (b
->type
== bp_catch_vfork
) ||
1317 (b
->type
== bp_catch_fork
))
1319 b
->loc
->address
= (CORE_ADDR
) NULL
;
1323 /* bp_finish is a special case. The only way we ought to be able
1324 to see one of these when an exec() has happened, is if the user
1325 caught a vfork, and then said "finish". Ordinarily a finish just
1326 carries them to the call-site of the current callee, by setting
1327 a temporary bp there and resuming. But in this case, the finish
1328 will carry them entirely through the vfork & exec.
1330 We don't want to allow a bp_finish to remain inserted now. But
1331 we can't safely delete it, 'cause finish_command has a handle to
1332 the bp on a bpstat, and will later want to delete it. There's a
1333 chance (and I've seen it happen) that if we delete the bp_finish
1334 here, that its storage will get reused by the time finish_command
1335 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1336 We really must allow finish_command to delete a bp_finish.
1338 In the absense of a general solution for the "how do we know
1339 it's safe to delete something others may have handles to?"
1340 problem, what we'll do here is just uninsert the bp_finish, and
1341 let finish_command delete it.
1343 (We know the bp_finish is "doomed" in the sense that it's
1344 momentary, and will be deleted as soon as finish_command sees
1345 the inferior stopped. So it doesn't matter that the bp's
1346 address is probably bogus in the new a.out, unlike e.g., the
1347 solib breakpoints.) */
1349 if (b
->type
== bp_finish
)
1354 /* Without a symbolic address, we have little hope of the
1355 pre-exec() address meaning the same thing in the post-exec()
1357 if (b
->addr_string
== NULL
)
1359 delete_breakpoint (b
);
1363 /* If this breakpoint has survived the above battery of checks, then
1364 it must have a symbolic address. Be sure that it gets reevaluated
1365 to a target address, rather than reusing the old evaluation.
1367 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1368 for bp_catch_exec and friends, I'm pretty sure this is entirely
1369 unnecessary. A call to breakpoint_re_set_one always recomputes
1370 the breakpoint's address from scratch, or deletes it if it can't.
1371 So I think this assignment could be deleted without effect. */
1372 b
->loc
->address
= (CORE_ADDR
) NULL
;
1374 /* FIXME what about longjmp breakpoints? Re-create them here? */
1375 create_overlay_event_breakpoint ("_ovly_debug_event");
1379 detach_breakpoints (int pid
)
1381 struct bp_location
*b
;
1383 struct cleanup
*old_chain
= save_inferior_ptid ();
1385 if (pid
== PIDGET (inferior_ptid
))
1386 error ("Cannot detach breakpoints of inferior_ptid");
1388 /* Set inferior_ptid; remove_breakpoint uses this global. */
1389 inferior_ptid
= pid_to_ptid (pid
);
1390 ALL_BP_LOCATIONS (b
)
1394 val
= remove_breakpoint (b
, mark_inserted
);
1397 do_cleanups (old_chain
);
1402 do_cleanups (old_chain
);
1407 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1411 if (b
->owner
->enable_state
== bp_permanent
)
1412 /* Permanent breakpoints cannot be inserted or removed. */
1415 if (b
->owner
->type
== bp_none
)
1416 warning ("attempted to remove apparently deleted breakpoint #%d?",
1419 if (b
->loc_type
== bp_loc_software_breakpoint
1420 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1422 /* "Normal" instruction breakpoint: either the standard
1423 trap-instruction bp (bp_breakpoint), or a
1424 bp_hardware_breakpoint. */
1426 /* First check to see if we have to handle an overlay. */
1427 if (overlay_debugging
== ovly_off
1428 || b
->section
== NULL
1429 || !(section_is_overlay (b
->section
)))
1431 /* No overlay handling: just remove the breakpoint. */
1433 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1434 val
= target_remove_hw_breakpoint (b
->address
,
1435 b
->shadow_contents
);
1437 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1441 /* This breakpoint is in an overlay section.
1442 Did we set a breakpoint at the LMA? */
1443 if (!overlay_events_enabled
)
1445 /* Yes -- overlay event support is not active, so we
1446 should have set a breakpoint at the LMA. Remove it.
1448 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
1450 /* Ignore any failures: if the LMA is in ROM, we will
1451 have already warned when we failed to insert it. */
1452 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1453 target_remove_hw_breakpoint (addr
, b
->shadow_contents
);
1455 target_remove_breakpoint (addr
, b
->shadow_contents
);
1457 /* Did we set a breakpoint at the VMA?
1458 If so, we will have marked the breakpoint 'inserted'. */
1461 /* Yes -- remove it. Previously we did not bother to
1462 remove the breakpoint if the section had been
1463 unmapped, but let's not rely on that being safe. We
1464 don't know what the overlay manager might do. */
1465 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1466 val
= target_remove_hw_breakpoint (b
->address
,
1467 b
->shadow_contents
);
1469 val
= target_remove_breakpoint (b
->address
,
1470 b
->shadow_contents
);
1474 /* No -- not inserted, so no need to remove. No error. */
1480 b
->inserted
= (is
== mark_inserted
);
1482 else if (b
->loc_type
== bp_loc_hardware_watchpoint
1483 && breakpoint_enabled (b
->owner
)
1489 b
->inserted
= (is
== mark_inserted
);
1490 /* Walk down the saved value chain. */
1491 for (v
= b
->owner
->val_chain
; v
; v
= v
->next
)
1493 /* For each memory reference remove the watchpoint
1495 if (VALUE_LVAL (v
) == lval_memory
1496 && ! VALUE_LAZY (v
))
1498 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
1500 if (v
== b
->owner
->val_chain
1501 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1502 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1507 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
1508 len
= TYPE_LENGTH (VALUE_TYPE (v
));
1510 if (b
->owner
->type
== bp_read_watchpoint
)
1512 else if (b
->owner
->type
== bp_access_watchpoint
)
1515 val
= target_remove_watchpoint (addr
, len
, type
);
1522 /* Failure to remove any of the hardware watchpoints comes here. */
1523 if ((is
== mark_uninserted
) && (b
->inserted
))
1524 warning ("Could not remove hardware watchpoint %d.",
1527 else if ((b
->owner
->type
== bp_catch_fork
||
1528 b
->owner
->type
== bp_catch_vfork
||
1529 b
->owner
->type
== bp_catch_exec
)
1530 && breakpoint_enabled (b
->owner
)
1534 switch (b
->owner
->type
)
1537 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1539 case bp_catch_vfork
:
1540 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1543 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1546 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1551 b
->inserted
= (is
== mark_inserted
);
1553 else if ((b
->owner
->type
== bp_catch_catch
||
1554 b
->owner
->type
== bp_catch_throw
)
1555 && breakpoint_enabled (b
->owner
)
1559 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1562 b
->inserted
= (is
== mark_inserted
);
1564 else if (ep_is_exception_catchpoint (b
->owner
)
1565 && b
->inserted
/* sometimes previous insert doesn't happen */
1566 && breakpoint_enabled (b
->owner
)
1570 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1574 b
->inserted
= (is
== mark_inserted
);
1580 /* Clear the "inserted" flag in all breakpoints. */
1583 mark_breakpoints_out (void)
1585 struct bp_location
*bpt
;
1587 ALL_BP_LOCATIONS (bpt
)
1591 /* Clear the "inserted" flag in all breakpoints and delete any
1592 breakpoints which should go away between runs of the program.
1594 Plus other such housekeeping that has to be done for breakpoints
1597 Note: this function gets called at the end of a run (by
1598 generic_mourn_inferior) and when a run begins (by
1599 init_wait_for_inferior). */
1604 breakpoint_init_inferior (enum inf_context context
)
1606 struct breakpoint
*b
, *temp
;
1607 struct bp_location
*bpt
;
1608 static int warning_needed
= 0;
1610 ALL_BP_LOCATIONS (bpt
)
1613 ALL_BREAKPOINTS_SAFE (b
, temp
)
1618 case bp_watchpoint_scope
:
1620 /* If the call dummy breakpoint is at the entry point it will
1621 cause problems when the inferior is rerun, so we better
1624 Also get rid of scope breakpoints. */
1625 delete_breakpoint (b
);
1629 case bp_hardware_watchpoint
:
1630 case bp_read_watchpoint
:
1631 case bp_access_watchpoint
:
1633 /* Likewise for watchpoints on local expressions. */
1634 if (b
->exp_valid_block
!= NULL
)
1635 delete_breakpoint (b
);
1636 if (context
== inf_starting
)
1638 /* Reset val field to force reread of starting value
1639 in insert_breakpoints. */
1641 value_free (b
->val
);
1646 /* Likewise for exception catchpoints in dynamic-linked
1647 executables where required */
1648 if (ep_is_exception_catchpoint (b
)
1649 && deprecated_exception_catchpoints_are_fragile
)
1652 delete_breakpoint (b
);
1658 if (deprecated_exception_catchpoints_are_fragile
)
1659 deprecated_exception_support_initialized
= 0;
1661 /* Don't issue the warning unless it's really needed... */
1662 if (warning_needed
&& (context
!= inf_exited
))
1664 warning ("Exception catchpoints from last run were deleted.");
1665 warning ("You must reinsert them explicitly.");
1670 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1671 exists at PC. It returns ordinary_breakpoint_here if it's an
1672 ordinary breakpoint, or permanent_breakpoint_here if it's a
1673 permanent breakpoint.
1674 - When continuing from a location with an ordinary breakpoint, we
1675 actually single step once before calling insert_breakpoints.
1676 - When continuing from a localion with a permanent breakpoint, we
1677 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1678 the target, to advance the PC past the breakpoint. */
1680 enum breakpoint_here
1681 breakpoint_here_p (CORE_ADDR pc
)
1683 struct bp_location
*bpt
;
1684 int any_breakpoint_here
= 0;
1686 ALL_BP_LOCATIONS (bpt
)
1688 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1689 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1692 if ((breakpoint_enabled (bpt
->owner
)
1693 || bpt
->owner
->enable_state
== bp_permanent
)
1694 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1696 if (overlay_debugging
1697 && section_is_overlay (bpt
->section
)
1698 && !section_is_mapped (bpt
->section
))
1699 continue; /* unmapped overlay -- can't be a match */
1700 else if (bpt
->owner
->enable_state
== bp_permanent
)
1701 return permanent_breakpoint_here
;
1703 any_breakpoint_here
= 1;
1707 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1711 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1712 but it only returns true if there is actually a breakpoint inserted
1716 breakpoint_inserted_here_p (CORE_ADDR pc
)
1718 struct bp_location
*bpt
;
1720 ALL_BP_LOCATIONS (bpt
)
1722 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1723 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1727 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1729 if (overlay_debugging
1730 && section_is_overlay (bpt
->section
)
1731 && !section_is_mapped (bpt
->section
))
1732 continue; /* unmapped overlay -- can't be a match */
1741 /* This function returns non-zero iff there is a software breakpoint
1745 software_breakpoint_inserted_here_p (CORE_ADDR pc
)
1747 struct bp_location
*bpt
;
1748 int any_breakpoint_here
= 0;
1750 ALL_BP_LOCATIONS (bpt
)
1752 if (bpt
->loc_type
!= bp_loc_software_breakpoint
)
1755 if ((breakpoint_enabled (bpt
->owner
)
1756 || bpt
->owner
->enable_state
== bp_permanent
)
1758 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1760 if (overlay_debugging
1761 && section_is_overlay (bpt
->section
)
1762 && !section_is_mapped (bpt
->section
))
1763 continue; /* unmapped overlay -- can't be a match */
1772 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1773 PC is valid for process/thread PTID. */
1776 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1778 struct bp_location
*bpt
;
1781 thread
= pid_to_thread_id (ptid
);
1783 ALL_BP_LOCATIONS (bpt
)
1785 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1786 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1789 if ((breakpoint_enabled (bpt
->owner
)
1790 || bpt
->owner
->enable_state
== bp_permanent
)
1791 && bpt
->address
== pc
1792 && (bpt
->owner
->thread
== -1 || bpt
->owner
->thread
== thread
))
1794 if (overlay_debugging
1795 && section_is_overlay (bpt
->section
)
1796 && !section_is_mapped (bpt
->section
))
1797 continue; /* unmapped overlay -- can't be a match */
1807 /* bpstat stuff. External routines' interfaces are documented
1811 ep_is_catchpoint (struct breakpoint
*ep
)
1814 (ep
->type
== bp_catch_load
)
1815 || (ep
->type
== bp_catch_unload
)
1816 || (ep
->type
== bp_catch_fork
)
1817 || (ep
->type
== bp_catch_vfork
)
1818 || (ep
->type
== bp_catch_exec
)
1819 || (ep
->type
== bp_catch_catch
)
1820 || (ep
->type
== bp_catch_throw
);
1822 /* ??rehrauer: Add more kinds here, as are implemented... */
1826 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1829 (ep
->type
== bp_catch_load
)
1830 || (ep
->type
== bp_catch_unload
);
1834 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1837 (ep
->type
== bp_catch_catch
)
1838 || (ep
->type
== bp_catch_throw
);
1841 /* Clear a bpstat so that it says we are not at any breakpoint.
1842 Also free any storage that is part of a bpstat. */
1845 bpstat_clear (bpstat
*bsp
)
1856 if (p
->old_val
!= NULL
)
1857 value_free (p
->old_val
);
1858 free_command_lines (&p
->commands
);
1865 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1866 is part of the bpstat is copied as well. */
1869 bpstat_copy (bpstat bs
)
1873 bpstat retval
= NULL
;
1878 for (; bs
!= NULL
; bs
= bs
->next
)
1880 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1881 memcpy (tmp
, bs
, sizeof (*tmp
));
1882 if (bs
->commands
!= NULL
)
1883 tmp
->commands
= copy_command_lines (bs
->commands
);
1884 if (bs
->old_val
!= NULL
)
1885 tmp
->old_val
= value_copy (bs
->old_val
);
1888 /* This is the first thing in the chain. */
1898 /* Find the bpstat associated with this breakpoint */
1901 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1906 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1908 if (bsp
->breakpoint_at
== breakpoint
)
1914 /* Find a step_resume breakpoint associated with this bpstat.
1915 (If there are multiple step_resume bp's on the list, this function
1916 will arbitrarily pick one.)
1918 It is an error to use this function if BPSTAT doesn't contain a
1919 step_resume breakpoint.
1921 See wait_for_inferior's use of this function. */
1923 bpstat_find_step_resume_breakpoint (bpstat bsp
)
1928 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1930 current_thread
= pid_to_thread_id (inferior_ptid
);
1932 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1934 if ((bsp
->breakpoint_at
!= NULL
) &&
1935 (bsp
->breakpoint_at
->type
== bp_step_resume
) &&
1936 (bsp
->breakpoint_at
->thread
== current_thread
||
1937 bsp
->breakpoint_at
->thread
== -1))
1938 return bsp
->breakpoint_at
;
1941 error ("Internal error (no step_resume breakpoint found)");
1945 /* Return the breakpoint number of the first breakpoint we are stopped
1946 at. *BSP upon return is a bpstat which points to the remaining
1947 breakpoints stopped at (but which is not guaranteed to be good for
1948 anything but further calls to bpstat_num).
1949 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1952 bpstat_num (bpstat
*bsp
)
1954 struct breakpoint
*b
;
1957 return 0; /* No more breakpoint values */
1960 b
= (*bsp
)->breakpoint_at
;
1961 *bsp
= (*bsp
)->next
;
1963 return -1; /* breakpoint that's been deleted since */
1965 return b
->number
; /* We have its number */
1969 /* Modify BS so that the actions will not be performed. */
1972 bpstat_clear_actions (bpstat bs
)
1974 for (; bs
!= NULL
; bs
= bs
->next
)
1976 free_command_lines (&bs
->commands
);
1977 if (bs
->old_val
!= NULL
)
1979 value_free (bs
->old_val
);
1985 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1987 cleanup_executing_breakpoints (void *ignore
)
1989 executing_breakpoint_commands
= 0;
1992 /* Execute all the commands associated with all the breakpoints at this
1993 location. Any of these commands could cause the process to proceed
1994 beyond this point, etc. We look out for such changes by checking
1995 the global "breakpoint_proceeded" after each command. */
1998 bpstat_do_actions (bpstat
*bsp
)
2001 struct cleanup
*old_chain
;
2003 /* Avoid endless recursion if a `source' command is contained
2005 if (executing_breakpoint_commands
)
2008 executing_breakpoint_commands
= 1;
2009 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
2012 /* Note that (as of this writing), our callers all appear to
2013 be passing us the address of global stop_bpstat. And, if
2014 our calls to execute_control_command cause the inferior to
2015 proceed, that global (and hence, *bsp) will change.
2017 We must be careful to not touch *bsp unless the inferior
2018 has not proceeded. */
2020 /* This pointer will iterate over the list of bpstat's. */
2023 breakpoint_proceeded
= 0;
2024 for (; bs
!= NULL
; bs
= bs
->next
)
2026 struct command_line
*cmd
;
2027 struct cleanup
*this_cmd_tree_chain
;
2029 /* Take ownership of the BSP's command tree, if it has one.
2031 The command tree could legitimately contain commands like
2032 'step' and 'next', which call clear_proceed_status, which
2033 frees stop_bpstat's command tree. To make sure this doesn't
2034 free the tree we're executing out from under us, we need to
2035 take ownership of the tree ourselves. Since a given bpstat's
2036 commands are only executed once, we don't need to copy it; we
2037 can clear the pointer in the bpstat, and make sure we free
2038 the tree when we're done. */
2041 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2045 execute_control_command (cmd
);
2047 if (breakpoint_proceeded
)
2053 /* We can free this command tree now. */
2054 do_cleanups (this_cmd_tree_chain
);
2056 if (breakpoint_proceeded
)
2057 /* The inferior is proceeded by the command; bomb out now.
2058 The bpstat chain has been blown away by wait_for_inferior.
2059 But since execution has stopped again, there is a new bpstat
2060 to look at, so start over. */
2063 do_cleanups (old_chain
);
2066 /* This is the normal print function for a bpstat. In the future,
2067 much of this logic could (should?) be moved to bpstat_stop_status,
2068 by having it set different print_it values.
2070 Current scheme: When we stop, bpstat_print() is called. It loops
2071 through the bpstat list of things causing this stop, calling the
2072 print_bp_stop_message function on each one. The behavior of the
2073 print_bp_stop_message function depends on the print_it field of
2074 bpstat. If such field so indicates, call this function here.
2076 Return values from this routine (ultimately used by bpstat_print()
2077 and normal_stop() to decide what to do):
2078 PRINT_NOTHING: Means we already printed all we needed to print,
2079 don't print anything else.
2080 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2081 that something to be followed by a location.
2082 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2083 that something to be followed by a location.
2084 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2087 static enum print_stop_action
2088 print_it_typical (bpstat bs
)
2090 struct cleanup
*old_chain
, *ui_out_chain
;
2091 struct ui_stream
*stb
;
2092 stb
= ui_out_stream_new (uiout
);
2093 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2094 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2095 which has since been deleted. */
2096 if (bs
->breakpoint_at
== NULL
)
2097 return PRINT_UNKNOWN
;
2099 switch (bs
->breakpoint_at
->type
)
2102 case bp_hardware_breakpoint
:
2103 if (bs
->breakpoint_at
->loc
->address
!= bs
->breakpoint_at
->loc
->requested_address
)
2104 breakpoint_adjustment_warning (bs
->breakpoint_at
->loc
->requested_address
,
2105 bs
->breakpoint_at
->loc
->address
,
2106 bs
->breakpoint_at
->number
, 1);
2107 annotate_breakpoint (bs
->breakpoint_at
->number
);
2108 ui_out_text (uiout
, "\nBreakpoint ");
2109 if (ui_out_is_mi_like_p (uiout
))
2110 ui_out_field_string (uiout
, "reason", "breakpoint-hit");
2111 ui_out_field_int (uiout
, "bkptno", bs
->breakpoint_at
->number
);
2112 ui_out_text (uiout
, ", ");
2113 return PRINT_SRC_AND_LOC
;
2116 case bp_shlib_event
:
2117 /* Did we stop because the user set the stop_on_solib_events
2118 variable? (If so, we report this as a generic, "Stopped due
2119 to shlib event" message.) */
2120 printf_filtered ("Stopped due to shared library event\n");
2121 return PRINT_NOTHING
;
2124 case bp_thread_event
:
2125 /* Not sure how we will get here.
2126 GDB should not stop for these breakpoints. */
2127 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
2128 return PRINT_NOTHING
;
2131 case bp_overlay_event
:
2132 /* By analogy with the thread event, GDB should not stop for these. */
2133 printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n");
2134 return PRINT_NOTHING
;
2138 annotate_catchpoint (bs
->breakpoint_at
->number
);
2139 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2140 printf_filtered ("loaded");
2141 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2142 return PRINT_SRC_AND_LOC
;
2145 case bp_catch_unload
:
2146 annotate_catchpoint (bs
->breakpoint_at
->number
);
2147 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2148 printf_filtered ("unloaded");
2149 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2150 return PRINT_SRC_AND_LOC
;
2154 annotate_catchpoint (bs
->breakpoint_at
->number
);
2155 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2156 printf_filtered ("forked");
2157 printf_filtered (" process %d), ",
2158 bs
->breakpoint_at
->forked_inferior_pid
);
2159 return PRINT_SRC_AND_LOC
;
2162 case bp_catch_vfork
:
2163 annotate_catchpoint (bs
->breakpoint_at
->number
);
2164 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2165 printf_filtered ("vforked");
2166 printf_filtered (" process %d), ",
2167 bs
->breakpoint_at
->forked_inferior_pid
);
2168 return PRINT_SRC_AND_LOC
;
2172 annotate_catchpoint (bs
->breakpoint_at
->number
);
2173 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
2174 bs
->breakpoint_at
->number
,
2175 bs
->breakpoint_at
->exec_pathname
);
2176 return PRINT_SRC_AND_LOC
;
2179 case bp_catch_catch
:
2180 if (current_exception_event
&&
2181 (CURRENT_EXCEPTION_KIND
== EX_EVENT_CATCH
))
2183 annotate_catchpoint (bs
->breakpoint_at
->number
);
2184 printf_filtered ("\nCatchpoint %d (exception caught), ",
2185 bs
->breakpoint_at
->number
);
2186 printf_filtered ("throw location ");
2187 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2188 printf_filtered ("%s:%d",
2189 CURRENT_EXCEPTION_THROW_FILE
,
2190 CURRENT_EXCEPTION_THROW_LINE
);
2192 printf_filtered ("unknown");
2194 printf_filtered (", catch location ");
2195 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2196 printf_filtered ("%s:%d",
2197 CURRENT_EXCEPTION_CATCH_FILE
,
2198 CURRENT_EXCEPTION_CATCH_LINE
);
2200 printf_filtered ("unknown");
2202 printf_filtered ("\n");
2203 /* don't bother to print location frame info */
2204 return PRINT_SRC_ONLY
;
2208 /* really throw, some other bpstat will handle it */
2209 return PRINT_UNKNOWN
;
2213 case bp_catch_throw
:
2214 if (current_exception_event
&&
2215 (CURRENT_EXCEPTION_KIND
== EX_EVENT_THROW
))
2217 annotate_catchpoint (bs
->breakpoint_at
->number
);
2218 printf_filtered ("\nCatchpoint %d (exception thrown), ",
2219 bs
->breakpoint_at
->number
);
2220 printf_filtered ("throw location ");
2221 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2222 printf_filtered ("%s:%d",
2223 CURRENT_EXCEPTION_THROW_FILE
,
2224 CURRENT_EXCEPTION_THROW_LINE
);
2226 printf_filtered ("unknown");
2228 printf_filtered (", catch location ");
2229 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2230 printf_filtered ("%s:%d",
2231 CURRENT_EXCEPTION_CATCH_FILE
,
2232 CURRENT_EXCEPTION_CATCH_LINE
);
2234 printf_filtered ("unknown");
2236 printf_filtered ("\n");
2237 /* don't bother to print location frame info */
2238 return PRINT_SRC_ONLY
;
2242 /* really catch, some other bpstat will handle it */
2243 return PRINT_UNKNOWN
;
2248 case bp_hardware_watchpoint
:
2249 if (bs
->old_val
!= NULL
)
2251 annotate_watchpoint (bs
->breakpoint_at
->number
);
2252 if (ui_out_is_mi_like_p (uiout
))
2253 ui_out_field_string (uiout
, "reason", "watchpoint-trigger");
2254 mention (bs
->breakpoint_at
);
2255 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2256 ui_out_text (uiout
, "\nOld value = ");
2257 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2258 ui_out_field_stream (uiout
, "old", stb
);
2259 ui_out_text (uiout
, "\nNew value = ");
2260 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2261 ui_out_field_stream (uiout
, "new", stb
);
2262 do_cleanups (ui_out_chain
);
2263 ui_out_text (uiout
, "\n");
2264 value_free (bs
->old_val
);
2267 /* More than one watchpoint may have been triggered. */
2268 return PRINT_UNKNOWN
;
2271 case bp_read_watchpoint
:
2272 if (ui_out_is_mi_like_p (uiout
))
2273 ui_out_field_string (uiout
, "reason", "read-watchpoint-trigger");
2274 mention (bs
->breakpoint_at
);
2275 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2276 ui_out_text (uiout
, "\nValue = ");
2277 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2278 ui_out_field_stream (uiout
, "value", stb
);
2279 do_cleanups (ui_out_chain
);
2280 ui_out_text (uiout
, "\n");
2281 return PRINT_UNKNOWN
;
2284 case bp_access_watchpoint
:
2285 if (bs
->old_val
!= NULL
)
2287 annotate_watchpoint (bs
->breakpoint_at
->number
);
2288 if (ui_out_is_mi_like_p (uiout
))
2289 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2290 mention (bs
->breakpoint_at
);
2291 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2292 ui_out_text (uiout
, "\nOld value = ");
2293 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2294 ui_out_field_stream (uiout
, "old", stb
);
2295 value_free (bs
->old_val
);
2297 ui_out_text (uiout
, "\nNew value = ");
2301 mention (bs
->breakpoint_at
);
2302 if (ui_out_is_mi_like_p (uiout
))
2303 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2304 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2305 ui_out_text (uiout
, "\nValue = ");
2307 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0,Val_pretty_default
);
2308 ui_out_field_stream (uiout
, "new", stb
);
2309 do_cleanups (ui_out_chain
);
2310 ui_out_text (uiout
, "\n");
2311 return PRINT_UNKNOWN
;
2314 /* Fall through, we don't deal with these types of breakpoints
2318 if (ui_out_is_mi_like_p (uiout
))
2319 ui_out_field_string (uiout
, "reason", "function-finished");
2320 return PRINT_UNKNOWN
;
2324 if (ui_out_is_mi_like_p (uiout
))
2325 ui_out_field_string (uiout
, "reason", "location-reached");
2326 return PRINT_UNKNOWN
;
2331 case bp_longjmp_resume
:
2332 case bp_step_resume
:
2333 case bp_through_sigtramp
:
2334 case bp_watchpoint_scope
:
2337 return PRINT_UNKNOWN
;
2341 /* Generic routine for printing messages indicating why we
2342 stopped. The behavior of this function depends on the value
2343 'print_it' in the bpstat structure. Under some circumstances we
2344 may decide not to print anything here and delegate the task to
2347 static enum print_stop_action
2348 print_bp_stop_message (bpstat bs
)
2350 switch (bs
->print_it
)
2353 /* Nothing should be printed for this bpstat entry. */
2354 return PRINT_UNKNOWN
;
2358 /* We still want to print the frame, but we already printed the
2359 relevant messages. */
2360 return PRINT_SRC_AND_LOC
;
2363 case print_it_normal
:
2364 /* Normal case. Call the breakpoint's print_it method, or
2365 print_it_typical. */
2366 if (bs
->breakpoint_at
!= NULL
&& bs
->breakpoint_at
->ops
!= NULL
2367 && bs
->breakpoint_at
->ops
->print_it
!= NULL
)
2368 return bs
->breakpoint_at
->ops
->print_it (bs
->breakpoint_at
);
2370 return print_it_typical (bs
);
2374 internal_error (__FILE__
, __LINE__
,
2375 "print_bp_stop_message: unrecognized enum value");
2380 /* Print a message indicating what happened. This is called from
2381 normal_stop(). The input to this routine is the head of the bpstat
2382 list - a list of the eventpoints that caused this stop. This
2383 routine calls the generic print routine for printing a message
2384 about reasons for stopping. This will print (for example) the
2385 "Breakpoint n," part of the output. The return value of this
2388 PRINT_UNKNOWN: Means we printed nothing
2389 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2390 code to print the location. An example is
2391 "Breakpoint 1, " which should be followed by
2393 PRINT_SRC_ONLY: Means we printed something, but there is no need
2394 to also print the location part of the message.
2395 An example is the catch/throw messages, which
2396 don't require a location appended to the end.
2397 PRINT_NOTHING: We have done some printing and we don't need any
2398 further info to be printed.*/
2400 enum print_stop_action
2401 bpstat_print (bpstat bs
)
2405 /* Maybe another breakpoint in the chain caused us to stop.
2406 (Currently all watchpoints go on the bpstat whether hit or not.
2407 That probably could (should) be changed, provided care is taken
2408 with respect to bpstat_explains_signal). */
2409 for (; bs
; bs
= bs
->next
)
2411 val
= print_bp_stop_message (bs
);
2412 if (val
== PRINT_SRC_ONLY
2413 || val
== PRINT_SRC_AND_LOC
2414 || val
== PRINT_NOTHING
)
2418 /* We reached the end of the chain, or we got a null BS to start
2419 with and nothing was printed. */
2420 return PRINT_UNKNOWN
;
2423 /* Evaluate the expression EXP and return 1 if value is zero.
2424 This is used inside a catch_errors to evaluate the breakpoint condition.
2425 The argument is a "struct expression *" that has been cast to char * to
2426 make it pass through catch_errors. */
2429 breakpoint_cond_eval (void *exp
)
2431 struct value
*mark
= value_mark ();
2432 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2433 value_free_to_mark (mark
);
2437 /* Allocate a new bpstat and chain it to the current one. */
2440 bpstat_alloc (struct breakpoint
*b
, bpstat cbs
/* Current "bs" value */ )
2444 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2446 bs
->breakpoint_at
= b
;
2447 /* If the condition is false, etc., don't do the commands. */
2448 bs
->commands
= NULL
;
2450 bs
->print_it
= print_it_normal
;
2454 /* Possible return values for watchpoint_check (this can't be an enum
2455 because of check_errors). */
2456 /* The watchpoint has been deleted. */
2457 #define WP_DELETED 1
2458 /* The value has changed. */
2459 #define WP_VALUE_CHANGED 2
2460 /* The value has not changed. */
2461 #define WP_VALUE_NOT_CHANGED 3
2463 #define BP_TEMPFLAG 1
2464 #define BP_HARDWAREFLAG 2
2466 /* Check watchpoint condition. */
2469 watchpoint_check (void *p
)
2471 bpstat bs
= (bpstat
) p
;
2472 struct breakpoint
*b
;
2473 struct frame_info
*fr
;
2474 int within_current_scope
;
2476 b
= bs
->breakpoint_at
;
2478 if (b
->exp_valid_block
== NULL
)
2479 within_current_scope
= 1;
2482 /* There is no current frame at this moment. If we're going to have
2483 any chance of handling watchpoints on local variables, we'll need
2484 the frame chain (so we can determine if we're in scope). */
2485 reinit_frame_cache ();
2486 fr
= frame_find_by_id (b
->watchpoint_frame
);
2487 within_current_scope
= (fr
!= NULL
);
2488 /* in_function_epilogue_p() returns a non-zero value if we're still
2489 in the function but the stack frame has already been invalidated.
2490 Since we can't rely on the values of local variables after the
2491 stack has been destroyed, we are treating the watchpoint in that
2492 state as `not changed' without further checking.
2494 vinschen/2003-09-04: The former implementation left out the case
2495 that the watchpoint frame couldn't be found by frame_find_by_id()
2496 because the current PC is currently in an epilogue. Calling
2497 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2498 if ((!within_current_scope
|| fr
== get_current_frame ())
2499 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2500 return WP_VALUE_NOT_CHANGED
;
2501 if (fr
&& within_current_scope
)
2502 /* If we end up stopping, the current frame will get selected
2503 in normal_stop. So this call to select_frame won't affect
2508 if (within_current_scope
)
2510 /* We use value_{,free_to_}mark because it could be a
2511 *long* time before we return to the command level and
2512 call free_all_values. We can't call free_all_values because
2513 we might be in the middle of evaluating a function call. */
2515 struct value
*mark
= value_mark ();
2516 struct value
*new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
2517 if (!value_equal (b
->val
, new_val
))
2519 release_value (new_val
);
2520 value_free_to_mark (mark
);
2521 bs
->old_val
= b
->val
;
2523 /* We will stop here */
2524 return WP_VALUE_CHANGED
;
2528 /* Nothing changed, don't do anything. */
2529 value_free_to_mark (mark
);
2530 /* We won't stop here */
2531 return WP_VALUE_NOT_CHANGED
;
2536 /* This seems like the only logical thing to do because
2537 if we temporarily ignored the watchpoint, then when
2538 we reenter the block in which it is valid it contains
2539 garbage (in the case of a function, it may have two
2540 garbage values, one before and one after the prologue).
2541 So we can't even detect the first assignment to it and
2542 watch after that (since the garbage may or may not equal
2543 the first value assigned). */
2544 /* We print all the stop information in print_it_typical(), but
2545 in this case, by the time we call print_it_typical() this bp
2546 will be deleted already. So we have no choice but print the
2547 information here. */
2548 if (ui_out_is_mi_like_p (uiout
))
2549 ui_out_field_string (uiout
, "reason", "watchpoint-scope");
2550 ui_out_text (uiout
, "\nWatchpoint ");
2551 ui_out_field_int (uiout
, "wpnum", bs
->breakpoint_at
->number
);
2552 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2553 which its expression is valid.\n");
2555 if (b
->related_breakpoint
)
2556 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2557 b
->disposition
= disp_del_at_next_stop
;
2563 /* Get a bpstat associated with having just stopped at address
2564 BP_ADDR in thread PTID. STOPPED_BY_WATCHPOINT is 1 if the
2565 target thinks we stopped due to a hardware watchpoint, 0 if we
2566 know we did not trigger a hardware watchpoint, and -1 if we do not know. */
2568 /* Determine whether we stopped at a breakpoint, etc, or whether we
2569 don't understand this stop. Result is a chain of bpstat's such that:
2571 if we don't understand the stop, the result is a null pointer.
2573 if we understand why we stopped, the result is not null.
2575 Each element of the chain refers to a particular breakpoint or
2576 watchpoint at which we have stopped. (We may have stopped for
2577 several reasons concurrently.)
2579 Each element of the chain has valid next, breakpoint_at,
2580 commands, FIXME??? fields. */
2583 bpstat_stop_status (CORE_ADDR bp_addr
, ptid_t ptid
, int stopped_by_watchpoint
)
2585 struct breakpoint
*b
, *temp
;
2586 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2587 int real_breakpoint
= 0;
2588 /* Root of the chain of bpstat's */
2589 struct bpstats root_bs
[1];
2590 /* Pointer to the last thing in the chain currently. */
2591 bpstat bs
= root_bs
;
2592 int thread_id
= pid_to_thread_id (ptid
);
2594 ALL_BREAKPOINTS_SAFE (b
, temp
)
2596 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
2599 if (b
->type
!= bp_watchpoint
2600 && b
->type
!= bp_hardware_watchpoint
2601 && b
->type
!= bp_read_watchpoint
2602 && b
->type
!= bp_access_watchpoint
2603 && b
->type
!= bp_hardware_breakpoint
2604 && b
->type
!= bp_catch_fork
2605 && b
->type
!= bp_catch_vfork
2606 && b
->type
!= bp_catch_exec
2607 && b
->type
!= bp_catch_catch
2608 && b
->type
!= bp_catch_throw
) /* a non-watchpoint bp */
2610 if (b
->loc
->address
!= bp_addr
) /* address doesn't match */
2612 if (overlay_debugging
/* unmapped overlay section */
2613 && section_is_overlay (b
->loc
->section
)
2614 && !section_is_mapped (b
->loc
->section
))
2618 /* Continuable hardware watchpoints are treated as non-existent if the
2619 reason we stopped wasn't a hardware watchpoint (we didn't stop on
2620 some data address). Otherwise gdb won't stop on a break instruction
2621 in the code (not from a breakpoint) when a hardware watchpoint has
2624 if ((b
->type
== bp_hardware_watchpoint
2625 || b
->type
== bp_read_watchpoint
2626 || b
->type
== bp_access_watchpoint
)
2627 && !stopped_by_watchpoint
)
2630 if (b
->type
== bp_hardware_breakpoint
)
2632 if (b
->loc
->address
!= bp_addr
)
2634 if (overlay_debugging
/* unmapped overlay section */
2635 && section_is_overlay (b
->loc
->section
)
2636 && !section_is_mapped (b
->loc
->section
))
2640 /* Is this a catchpoint of a load or unload? If so, did we
2641 get a load or unload of the specified library? If not,
2643 if ((b
->type
== bp_catch_load
)
2644 #if defined(SOLIB_HAVE_LOAD_EVENT)
2645 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2646 || ((b
->dll_pathname
!= NULL
)
2647 && (strcmp (b
->dll_pathname
,
2648 SOLIB_LOADED_LIBRARY_PATHNAME (
2649 PIDGET (inferior_ptid
)))
2655 if ((b
->type
== bp_catch_unload
)
2656 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2657 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2658 || ((b
->dll_pathname
!= NULL
)
2659 && (strcmp (b
->dll_pathname
,
2660 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2661 PIDGET (inferior_ptid
)))
2667 if ((b
->type
== bp_catch_fork
)
2668 && !inferior_has_forked (PIDGET (inferior_ptid
),
2669 &b
->forked_inferior_pid
))
2672 if ((b
->type
== bp_catch_vfork
)
2673 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2674 &b
->forked_inferior_pid
))
2677 if ((b
->type
== bp_catch_exec
)
2678 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2681 if (ep_is_exception_catchpoint (b
) &&
2682 !(current_exception_event
= target_get_current_exception_event ()))
2685 /* Come here if it's a watchpoint, or if the break address matches */
2687 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
2689 /* Watchpoints may change this, if not found to have triggered. */
2693 if (b
->type
== bp_watchpoint
||
2694 b
->type
== bp_hardware_watchpoint
)
2696 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2698 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2699 int e
= catch_errors (watchpoint_check
, bs
, message
,
2701 do_cleanups (cleanups
);
2705 /* We've already printed what needs to be printed. */
2706 /* Actually this is superfluous, because by the time we
2707 call print_it_typical() the wp will be already deleted,
2708 and the function will return immediately. */
2709 bs
->print_it
= print_it_done
;
2712 case WP_VALUE_CHANGED
:
2716 case WP_VALUE_NOT_CHANGED
:
2718 bs
->print_it
= print_it_noop
;
2725 /* Error from catch_errors. */
2726 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2727 if (b
->related_breakpoint
)
2728 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2729 b
->disposition
= disp_del_at_next_stop
;
2730 /* We've already printed what needs to be printed. */
2731 bs
->print_it
= print_it_done
;
2737 else if (b
->type
== bp_read_watchpoint
||
2738 b
->type
== bp_access_watchpoint
)
2744 addr
= target_stopped_data_address ();
2747 for (v
= b
->val_chain
; v
; v
= v
->next
)
2749 if (VALUE_LVAL (v
) == lval_memory
2750 && ! VALUE_LAZY (v
))
2752 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
2754 if (v
== b
->val_chain
2755 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
2756 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
2760 vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
2761 /* Exact match not required. Within range is
2763 if (addr
>= vaddr
&&
2764 addr
< vaddr
+ TYPE_LENGTH (VALUE_TYPE (v
)))
2771 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2773 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2774 int e
= catch_errors (watchpoint_check
, bs
, message
,
2776 do_cleanups (cleanups
);
2780 /* We've already printed what needs to be printed. */
2781 bs
->print_it
= print_it_done
;
2784 case WP_VALUE_CHANGED
:
2785 if (b
->type
== bp_read_watchpoint
)
2787 /* Don't stop: read watchpoints shouldn't fire if
2788 the value has changed. This is for targets
2789 which cannot set read-only watchpoints. */
2790 bs
->print_it
= print_it_noop
;
2796 case WP_VALUE_NOT_CHANGED
:
2803 /* Error from catch_errors. */
2804 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2805 if (b
->related_breakpoint
)
2806 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2807 b
->disposition
= disp_del_at_next_stop
;
2808 /* We've already printed what needs to be printed. */
2809 bs
->print_it
= print_it_done
;
2813 else /* found == 0 */
2815 /* This is a case where some watchpoint(s) triggered,
2816 but not at the address of this watchpoint (FOUND
2817 was left zero). So don't print anything for this
2819 bs
->print_it
= print_it_noop
;
2826 /* By definition, an encountered breakpoint is a triggered
2830 real_breakpoint
= 1;
2833 if (frame_id_p (b
->frame_id
)
2834 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2838 int value_is_zero
= 0;
2842 /* Need to select the frame, with all that implies
2843 so that the conditions will have the right context. */
2844 select_frame (get_current_frame ());
2846 = catch_errors (breakpoint_cond_eval
, (b
->cond
),
2847 "Error in testing breakpoint condition:\n",
2849 /* FIXME-someday, should give breakpoint # */
2852 if (b
->cond
&& value_is_zero
)
2855 /* Don't consider this a hit. */
2858 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
2861 /* Don't consider this a hit. */
2864 else if (b
->ignore_count
> 0)
2867 annotate_ignore_count_change ();
2872 /* We will stop here */
2873 if (b
->disposition
== disp_disable
)
2874 b
->enable_state
= bp_disabled
;
2877 bs
->commands
= b
->commands
;
2879 (strcmp ("silent", bs
->commands
->line
) == 0
2880 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
2882 bs
->commands
= bs
->commands
->next
;
2885 bs
->commands
= copy_command_lines (bs
->commands
);
2888 /* Print nothing for this entry if we dont stop or if we dont print. */
2889 if (bs
->stop
== 0 || bs
->print
== 0)
2890 bs
->print_it
= print_it_noop
;
2893 bs
->next
= NULL
; /* Terminate the chain */
2894 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2896 /* The value of a hardware watchpoint hasn't changed, but the
2897 intermediate memory locations we are watching may have. */
2898 if (bs
&& !bs
->stop
&&
2899 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2900 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2901 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2903 remove_breakpoints ();
2904 insert_breakpoints ();
2909 /* Tell what to do about this bpstat. */
2911 bpstat_what (bpstat bs
)
2913 /* Classify each bpstat as one of the following. */
2916 /* This bpstat element has no effect on the main_action. */
2919 /* There was a watchpoint, stop but don't print. */
2922 /* There was a watchpoint, stop and print. */
2925 /* There was a breakpoint but we're not stopping. */
2928 /* There was a breakpoint, stop but don't print. */
2931 /* There was a breakpoint, stop and print. */
2934 /* We hit the longjmp breakpoint. */
2937 /* We hit the longjmp_resume breakpoint. */
2940 /* We hit the step_resume breakpoint. */
2943 /* We hit the through_sigtramp breakpoint. */
2946 /* We hit the shared library event breakpoint. */
2949 /* We caught a shared library event. */
2952 /* This is just used to count how many enums there are. */
2956 /* Here is the table which drives this routine. So that we can
2957 format it pretty, we define some abbreviations for the
2958 enum bpstat_what codes. */
2959 #define kc BPSTAT_WHAT_KEEP_CHECKING
2960 #define ss BPSTAT_WHAT_STOP_SILENT
2961 #define sn BPSTAT_WHAT_STOP_NOISY
2962 #define sgl BPSTAT_WHAT_SINGLE
2963 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2964 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2965 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2966 #define sr BPSTAT_WHAT_STEP_RESUME
2967 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2968 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2969 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2971 /* "Can't happen." Might want to print an error message.
2972 abort() is not out of the question, but chances are GDB is just
2973 a bit confused, not unusable. */
2974 #define err BPSTAT_WHAT_STOP_NOISY
2976 /* Given an old action and a class, come up with a new action. */
2977 /* One interesting property of this table is that wp_silent is the same
2978 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2979 after stopping, the check for whether to step over a breakpoint
2980 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2981 reference to how we stopped. We retain separate wp_silent and
2982 bp_silent codes in case we want to change that someday.
2984 Another possibly interesting property of this table is that
2985 there's a partial ordering, priority-like, of the actions. Once
2986 you've decided that some action is appropriate, you'll never go
2987 back and decide something of a lower priority is better. The
2990 kc < clr sgl shl shlr slr sn sr ss ts
2991 sgl < clrs shl shlr slr sn sr ss ts
2992 slr < err shl shlr sn sr ss ts
2993 clr < clrs err shl shlr sn sr ss ts
2994 clrs < err shl shlr sn sr ss ts
2995 ss < shl shlr sn sr ts
3002 What I think this means is that we don't need a damned table
3003 here. If you just put the rows and columns in the right order,
3004 it'd look awfully regular. We could simply walk the bpstat list
3005 and choose the highest priority action we find, with a little
3006 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
3007 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
3008 is messy anyway). */
3010 /* step_resume entries: a step resume breakpoint overrides another
3011 breakpoint of signal handling (see comment in wait_for_inferior
3012 at where we set the step_resume breakpoint). */
3013 /* We handle the through_sigtramp_breakpoint the same way; having both
3014 one of those and a step_resume_breakpoint is probably very rare (?). */
3016 static const enum bpstat_what_main_action
3017 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3020 /* kc ss sn sgl slr clr clrs sr ts shl shlr
3023 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, ts
, shl
, shlr
},
3025 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3027 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3029 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, ts
, shl
, shlr
},
3031 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3033 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3035 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, ts
, shl
, shlr
},
3037 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, ts
, shl
, shlr
},
3039 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, ts
, shl
, shlr
},
3041 {ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, shl
, shlr
},
3043 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, shl
, ts
, shl
, shlr
},
3045 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, ts
, shlr
, shlr
}
3060 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3061 struct bpstat_what retval
;
3063 retval
.call_dummy
= 0;
3064 for (; bs
!= NULL
; bs
= bs
->next
)
3066 enum class bs_class
= no_effect
;
3067 if (bs
->breakpoint_at
== NULL
)
3068 /* I suspect this can happen if it was a momentary breakpoint
3069 which has since been deleted. */
3071 switch (bs
->breakpoint_at
->type
)
3077 case bp_hardware_breakpoint
:
3083 bs_class
= bp_noisy
;
3085 bs_class
= bp_silent
;
3088 bs_class
= bp_nostop
;
3091 case bp_hardware_watchpoint
:
3092 case bp_read_watchpoint
:
3093 case bp_access_watchpoint
:
3097 bs_class
= wp_noisy
;
3099 bs_class
= wp_silent
;
3102 /* There was a watchpoint, but we're not stopping.
3103 This requires no further action. */
3104 bs_class
= no_effect
;
3107 bs_class
= long_jump
;
3109 case bp_longjmp_resume
:
3110 bs_class
= long_resume
;
3112 case bp_step_resume
:
3115 bs_class
= step_resume
;
3118 /* It is for the wrong frame. */
3119 bs_class
= bp_nostop
;
3121 case bp_through_sigtramp
:
3122 bs_class
= through_sig
;
3124 case bp_watchpoint_scope
:
3125 bs_class
= bp_nostop
;
3127 case bp_shlib_event
:
3128 bs_class
= shlib_event
;
3130 case bp_thread_event
:
3131 case bp_overlay_event
:
3132 bs_class
= bp_nostop
;
3135 case bp_catch_unload
:
3136 /* Only if this catchpoint triggered should we cause the
3137 step-out-of-dld behaviour. Otherwise, we ignore this
3140 bs_class
= catch_shlib_event
;
3142 bs_class
= no_effect
;
3145 case bp_catch_vfork
:
3150 bs_class
= bp_noisy
;
3152 bs_class
= bp_silent
;
3155 /* There was a catchpoint, but we're not stopping.
3156 This requires no further action. */
3157 bs_class
= no_effect
;
3159 case bp_catch_catch
:
3160 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
3161 bs_class
= bp_nostop
;
3163 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3165 case bp_catch_throw
:
3166 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
3167 bs_class
= bp_nostop
;
3169 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3172 /* Make sure the action is stop (silent or noisy),
3173 so infrun.c pops the dummy frame. */
3174 bs_class
= bp_silent
;
3175 retval
.call_dummy
= 1;
3178 current_action
= table
[(int) bs_class
][(int) current_action
];
3180 retval
.main_action
= current_action
;
3184 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3185 without hardware support). This isn't related to a specific bpstat,
3186 just to things like whether watchpoints are set. */
3189 bpstat_should_step (void)
3191 struct breakpoint
*b
;
3193 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
)
3198 /* Nonzero if there are enabled hardware watchpoints. */
3200 bpstat_have_active_hw_watchpoints (void)
3202 struct bp_location
*bpt
;
3203 ALL_BP_LOCATIONS (bpt
)
3204 if (breakpoint_enabled (bpt
->owner
)
3206 && bpt
->loc_type
== bp_loc_hardware_watchpoint
)
3212 /* Given a bpstat that records zero or more triggered eventpoints, this
3213 function returns another bpstat which contains only the catchpoints
3214 on that first list, if any. */
3216 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3218 struct bpstats root_bs
[1];
3219 bpstat bs
= root_bs
;
3220 struct breakpoint
*ep
;
3223 bpstat_clear (cp_list
);
3224 root_bs
->next
= NULL
;
3226 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3228 /* Is this eventpoint a catchpoint? If not, ignore it. */
3229 ep
= ep_list
->breakpoint_at
;
3232 if ((ep
->type
!= bp_catch_load
) &&
3233 (ep
->type
!= bp_catch_unload
) &&
3234 (ep
->type
!= bp_catch_catch
) &&
3235 (ep
->type
!= bp_catch_throw
))
3236 /* pai: (temp) ADD fork/vfork here!! */
3239 /* Yes; add it to the list. */
3240 bs
= bpstat_alloc (ep
, bs
);
3245 #if defined(SOLIB_ADD)
3246 /* Also, for each triggered catchpoint, tag it with the name of
3247 the library that caused this trigger. (We copy the name now,
3248 because it's only guaranteed to be available NOW, when the
3249 catchpoint triggers. Clients who may wish to know the name
3250 later must get it from the catchpoint itself.) */
3251 if (ep
->triggered_dll_pathname
!= NULL
)
3252 xfree (ep
->triggered_dll_pathname
);
3253 if (ep
->type
== bp_catch_load
)
3254 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3255 PIDGET (inferior_ptid
));
3257 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3258 PIDGET (inferior_ptid
));
3260 dll_pathname
= NULL
;
3264 ep
->triggered_dll_pathname
= (char *)
3265 xmalloc (strlen (dll_pathname
) + 1);
3266 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3269 ep
->triggered_dll_pathname
= NULL
;
3275 /* Print B to gdb_stdout. */
3277 print_one_breakpoint (struct breakpoint
*b
,
3278 CORE_ADDR
*last_addr
)
3280 struct command_line
*l
;
3282 struct ep_type_description
3287 static struct ep_type_description bptypes
[] =
3289 {bp_none
, "?deleted?"},
3290 {bp_breakpoint
, "breakpoint"},
3291 {bp_hardware_breakpoint
, "hw breakpoint"},
3292 {bp_until
, "until"},
3293 {bp_finish
, "finish"},
3294 {bp_watchpoint
, "watchpoint"},
3295 {bp_hardware_watchpoint
, "hw watchpoint"},
3296 {bp_read_watchpoint
, "read watchpoint"},
3297 {bp_access_watchpoint
, "acc watchpoint"},
3298 {bp_longjmp
, "longjmp"},
3299 {bp_longjmp_resume
, "longjmp resume"},
3300 {bp_step_resume
, "step resume"},
3301 {bp_through_sigtramp
, "sigtramp"},
3302 {bp_watchpoint_scope
, "watchpoint scope"},
3303 {bp_call_dummy
, "call dummy"},
3304 {bp_shlib_event
, "shlib events"},
3305 {bp_thread_event
, "thread events"},
3306 {bp_overlay_event
, "overlay events"},
3307 {bp_catch_load
, "catch load"},
3308 {bp_catch_unload
, "catch unload"},
3309 {bp_catch_fork
, "catch fork"},
3310 {bp_catch_vfork
, "catch vfork"},
3311 {bp_catch_exec
, "catch exec"},
3312 {bp_catch_catch
, "catch catch"},
3313 {bp_catch_throw
, "catch throw"}
3316 static char *bpdisps
[] =
3317 {"del", "dstp", "dis", "keep"};
3318 static char bpenables
[] = "nynny";
3319 char wrap_indent
[80];
3320 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3321 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3322 struct cleanup
*bkpt_chain
;
3325 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3329 ui_out_field_int (uiout
, "number", b
->number
);
3333 if (((int) b
->type
> (sizeof (bptypes
) / sizeof (bptypes
[0])))
3334 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3335 internal_error (__FILE__
, __LINE__
,
3336 "bptypes table does not describe type #%d.",
3338 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3342 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3346 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3347 ui_out_spaces (uiout
, 2);
3350 strcpy (wrap_indent
, " ");
3353 if (TARGET_ADDR_BIT
<= 32)
3354 strcat (wrap_indent
, " ");
3356 strcat (wrap_indent
, " ");
3359 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3360 b
->ops
->print_one (b
, last_addr
);
3365 internal_error (__FILE__
, __LINE__
,
3366 "print_one_breakpoint: bp_none encountered\n");
3370 case bp_hardware_watchpoint
:
3371 case bp_read_watchpoint
:
3372 case bp_access_watchpoint
:
3373 /* Field 4, the address, is omitted (which makes the columns
3374 not line up too nicely with the headers, but the effect
3375 is relatively readable). */
3377 ui_out_field_skip (uiout
, "addr");
3379 print_expression (b
->exp
, stb
->stream
);
3380 ui_out_field_stream (uiout
, "what", stb
);
3384 case bp_catch_unload
:
3385 /* Field 4, the address, is omitted (which makes the columns
3386 not line up too nicely with the headers, but the effect
3387 is relatively readable). */
3389 ui_out_field_skip (uiout
, "addr");
3391 if (b
->dll_pathname
== NULL
)
3393 ui_out_field_string (uiout
, "what", "<any library>");
3394 ui_out_spaces (uiout
, 1);
3398 ui_out_text (uiout
, "library \"");
3399 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3400 ui_out_text (uiout
, "\" ");
3405 case bp_catch_vfork
:
3406 /* Field 4, the address, is omitted (which makes the columns
3407 not line up too nicely with the headers, but the effect
3408 is relatively readable). */
3410 ui_out_field_skip (uiout
, "addr");
3412 if (b
->forked_inferior_pid
!= 0)
3414 ui_out_text (uiout
, "process ");
3415 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3416 ui_out_spaces (uiout
, 1);
3420 /* Field 4, the address, is omitted (which makes the columns
3421 not line up too nicely with the headers, but the effect
3422 is relatively readable). */
3424 ui_out_field_skip (uiout
, "addr");
3426 if (b
->exec_pathname
!= NULL
)
3428 ui_out_text (uiout
, "program \"");
3429 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3430 ui_out_text (uiout
, "\" ");
3434 case bp_catch_catch
:
3435 /* Field 4, the address, is omitted (which makes the columns
3436 not line up too nicely with the headers, but the effect
3437 is relatively readable). */
3439 ui_out_field_skip (uiout
, "addr");
3441 ui_out_field_string (uiout
, "what", "exception catch");
3442 ui_out_spaces (uiout
, 1);
3445 case bp_catch_throw
:
3446 /* Field 4, the address, is omitted (which makes the columns
3447 not line up too nicely with the headers, but the effect
3448 is relatively readable). */
3450 ui_out_field_skip (uiout
, "addr");
3452 ui_out_field_string (uiout
, "what", "exception throw");
3453 ui_out_spaces (uiout
, 1);
3457 case bp_hardware_breakpoint
:
3461 case bp_longjmp_resume
:
3462 case bp_step_resume
:
3463 case bp_through_sigtramp
:
3464 case bp_watchpoint_scope
:
3466 case bp_shlib_event
:
3467 case bp_thread_event
:
3468 case bp_overlay_event
:
3473 ui_out_field_string (uiout
, "addr", "<PENDING>");
3475 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
3478 *last_addr
= b
->loc
->address
;
3481 sym
= find_pc_sect_function (b
->loc
->address
, b
->loc
->section
);
3484 ui_out_text (uiout
, "in ");
3485 ui_out_field_string (uiout
, "func",
3486 SYMBOL_PRINT_NAME (sym
));
3487 ui_out_wrap_hint (uiout
, wrap_indent
);
3488 ui_out_text (uiout
, " at ");
3490 ui_out_field_string (uiout
, "file", b
->source_file
);
3491 ui_out_text (uiout
, ":");
3492 ui_out_field_int (uiout
, "line", b
->line_number
);
3494 else if (b
->pending
)
3496 ui_out_field_string (uiout
, "pending", b
->addr_string
);
3500 print_address_symbolic (b
->loc
->address
, stb
->stream
, demangle
, "");
3501 ui_out_field_stream (uiout
, "at", stb
);
3506 if (b
->thread
!= -1)
3508 /* FIXME: This seems to be redundant and lost here; see the
3509 "stop only in" line a little further down. */
3510 ui_out_text (uiout
, " thread ");
3511 ui_out_field_int (uiout
, "thread", b
->thread
);
3514 ui_out_text (uiout
, "\n");
3516 if (frame_id_p (b
->frame_id
))
3519 ui_out_text (uiout
, "\tstop only in stack frame at ");
3520 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3522 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3523 ui_out_text (uiout
, "\n");
3529 ui_out_text (uiout
, "\tstop only if ");
3530 print_expression (b
->cond
, stb
->stream
);
3531 ui_out_field_stream (uiout
, "cond", stb
);
3532 ui_out_text (uiout
, "\n");
3535 if (b
->pending
&& b
->cond_string
)
3538 ui_out_text (uiout
, "\tstop only if ");
3539 ui_out_field_string (uiout
, "cond", b
->cond_string
);
3540 ui_out_text (uiout
, "\n");
3543 if (b
->thread
!= -1)
3545 /* FIXME should make an annotation for this */
3546 ui_out_text (uiout
, "\tstop only in thread ");
3547 ui_out_field_int (uiout
, "thread", b
->thread
);
3548 ui_out_text (uiout
, "\n");
3551 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3553 /* FIXME should make an annotation for this */
3554 if (ep_is_catchpoint (b
))
3555 ui_out_text (uiout
, "\tcatchpoint");
3557 ui_out_text (uiout
, "\tbreakpoint");
3558 ui_out_text (uiout
, " already hit ");
3559 ui_out_field_int (uiout
, "times", b
->hit_count
);
3560 if (b
->hit_count
== 1)
3561 ui_out_text (uiout
, " time\n");
3563 ui_out_text (uiout
, " times\n");
3566 /* Output the count also if it is zero, but only if this is
3567 mi. FIXME: Should have a better test for this. */
3568 if (ui_out_is_mi_like_p (uiout
))
3569 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3570 ui_out_field_int (uiout
, "times", b
->hit_count
);
3572 if (b
->ignore_count
)
3575 ui_out_text (uiout
, "\tignore next ");
3576 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3577 ui_out_text (uiout
, " hits\n");
3580 if ((l
= b
->commands
))
3582 struct cleanup
*script_chain
;
3585 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3586 print_command_lines (uiout
, l
, 4);
3587 do_cleanups (script_chain
);
3589 do_cleanups (bkpt_chain
);
3590 do_cleanups (old_chain
);
3593 struct captured_breakpoint_query_args
3599 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3601 struct captured_breakpoint_query_args
*args
= data
;
3602 struct breakpoint
*b
;
3603 CORE_ADDR dummy_addr
= 0;
3606 if (args
->bnum
== b
->number
)
3608 print_one_breakpoint (b
, &dummy_addr
);
3616 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
)
3618 struct captured_breakpoint_query_args args
;
3620 /* For the moment we don't trust print_one_breakpoint() to not throw
3622 return catch_exceptions (uiout
, do_captured_breakpoint_query
, &args
,
3623 NULL
, RETURN_MASK_ALL
);
3626 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3627 catchpoints, et.al.). */
3630 user_settable_breakpoint (const struct breakpoint
*b
)
3632 return (b
->type
== bp_breakpoint
3633 || b
->type
== bp_catch_load
3634 || b
->type
== bp_catch_unload
3635 || b
->type
== bp_catch_fork
3636 || b
->type
== bp_catch_vfork
3637 || b
->type
== bp_catch_exec
3638 || b
->type
== bp_catch_catch
3639 || b
->type
== bp_catch_throw
3640 || b
->type
== bp_hardware_breakpoint
3641 || b
->type
== bp_watchpoint
3642 || b
->type
== bp_read_watchpoint
3643 || b
->type
== bp_access_watchpoint
3644 || b
->type
== bp_hardware_watchpoint
);
3647 /* Print information on user settable breakpoint (watchpoint, etc)
3648 number BNUM. If BNUM is -1 print all user settable breakpoints.
3649 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3652 breakpoint_1 (int bnum
, int allflag
)
3654 struct breakpoint
*b
;
3655 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3656 int nr_printable_breakpoints
;
3657 struct cleanup
*bkpttbl_chain
;
3659 /* Compute the number of rows in the table. */
3660 nr_printable_breakpoints
= 0;
3663 || bnum
== b
->number
)
3665 if (allflag
|| user_settable_breakpoint (b
))
3666 nr_printable_breakpoints
++;
3671 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3675 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3678 if (nr_printable_breakpoints
> 0)
3679 annotate_breakpoints_headers ();
3680 if (nr_printable_breakpoints
> 0)
3682 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3683 if (nr_printable_breakpoints
> 0)
3685 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3686 if (nr_printable_breakpoints
> 0)
3688 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3689 if (nr_printable_breakpoints
> 0)
3691 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3694 if (nr_printable_breakpoints
> 0)
3696 if (TARGET_ADDR_BIT
<= 32)
3697 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3699 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3701 if (nr_printable_breakpoints
> 0)
3703 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3704 ui_out_table_body (uiout
);
3705 if (nr_printable_breakpoints
> 0)
3706 annotate_breakpoints_table ();
3710 || bnum
== b
->number
)
3712 /* We only print out user settable breakpoints unless the
3714 if (allflag
|| user_settable_breakpoint (b
))
3715 print_one_breakpoint (b
, &last_addr
);
3718 do_cleanups (bkpttbl_chain
);
3720 if (nr_printable_breakpoints
== 0)
3723 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3725 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3730 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3731 that a comparison of an unsigned with -1 is always false. */
3732 if (last_addr
!= (CORE_ADDR
) -1)
3733 set_next_address (last_addr
);
3736 /* FIXME? Should this be moved up so that it is only called when
3737 there have been breakpoints? */
3738 annotate_breakpoints_table_end ();
3742 breakpoints_info (char *bnum_exp
, int from_tty
)
3747 bnum
= parse_and_eval_long (bnum_exp
);
3749 breakpoint_1 (bnum
, 0);
3753 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3758 bnum
= parse_and_eval_long (bnum_exp
);
3760 breakpoint_1 (bnum
, 1);
3763 /* Print a message describing any breakpoints set at PC. */
3766 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
)
3769 struct breakpoint
*b
;
3772 if (b
->loc
->address
== pc
) /* address match / overlay match */
3773 if (!b
->pending
&& (!overlay_debugging
|| b
->loc
->section
== section
))
3777 printf_filtered ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
3779 if (b
->loc
->address
== pc
) /* address match / overlay match */
3780 if (!b
->pending
&& (!overlay_debugging
|| b
->loc
->section
== section
))
3783 printf_filtered ("%d%s%s ",
3785 ((b
->enable_state
== bp_disabled
||
3786 b
->enable_state
== bp_shlib_disabled
||
3787 b
->enable_state
== bp_call_disabled
)
3789 : b
->enable_state
== bp_permanent
3793 : ((others
== 1) ? " and" : ""));
3795 printf_filtered ("also set at pc ");
3796 print_address_numeric (pc
, 1, gdb_stdout
);
3797 printf_filtered (".\n");
3801 /* Set the default place to put a breakpoint
3802 for the `break' command with no arguments. */
3805 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3808 default_breakpoint_valid
= valid
;
3809 default_breakpoint_address
= addr
;
3810 default_breakpoint_symtab
= symtab
;
3811 default_breakpoint_line
= line
;
3814 /* Return true iff it is meaningful to use the address member of
3815 BPT. For some breakpoint types, the address member is irrelevant
3816 and it makes no sense to attempt to compare it to other addresses
3817 (or use it for any other purpose either).
3819 More specifically, each of the following breakpoint types will always
3820 have a zero valued address and we don't want check_duplicates() to mark
3821 breakpoints of any of these types to be a duplicate of an actual
3822 breakpoint at address zero:
3825 bp_hardware_watchpoint
3827 bp_access_watchpoint
3834 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3836 enum bptype type
= bpt
->type
;
3838 return (type
!= bp_watchpoint
3839 && type
!= bp_hardware_watchpoint
3840 && type
!= bp_read_watchpoint
3841 && type
!= bp_access_watchpoint
3842 && type
!= bp_catch_exec
3843 && type
!= bp_longjmp_resume
3844 && type
!= bp_catch_fork
3845 && type
!= bp_catch_vfork
);
3848 /* Rescan breakpoints at the same address and section as BPT,
3849 marking the first one as "first" and any others as "duplicates".
3850 This is so that the bpt instruction is only inserted once.
3851 If we have a permanent breakpoint at the same place as BPT, make
3852 that one the official one, and the rest as duplicates. */
3855 check_duplicates (struct breakpoint
*bpt
)
3857 struct bp_location
*b
;
3859 struct bp_location
*perm_bp
= 0;
3860 CORE_ADDR address
= bpt
->loc
->address
;
3861 asection
*section
= bpt
->loc
->section
;
3863 if (! breakpoint_address_is_meaningful (bpt
))
3866 ALL_BP_LOCATIONS (b
)
3867 if (b
->owner
->enable_state
!= bp_disabled
3868 && b
->owner
->enable_state
!= bp_shlib_disabled
3869 && !b
->owner
->pending
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
))
3875 /* Have we found a permanent breakpoint? */
3876 if (b
->owner
->enable_state
== bp_permanent
)
3883 b
->duplicate
= count
> 1;
3886 /* If we found a permanent breakpoint at this address, go over the
3887 list again and declare all the other breakpoints there to be the
3891 perm_bp
->duplicate
= 0;
3893 /* Permanent breakpoint should always be inserted. */
3894 if (! perm_bp
->inserted
)
3895 internal_error (__FILE__
, __LINE__
,
3896 "allegedly permanent breakpoint is not "
3897 "actually inserted");
3899 ALL_BP_LOCATIONS (b
)
3902 if (b
->owner
->enable_state
!= bp_disabled
3903 && b
->owner
->enable_state
!= bp_shlib_disabled
3904 && !b
->owner
->pending
3905 && b
->owner
->enable_state
!= bp_call_disabled
3906 && b
->address
== address
/* address / overlay match */
3907 && (!overlay_debugging
|| b
->section
== section
)
3908 && breakpoint_address_is_meaningful (b
->owner
))
3911 internal_error (__FILE__
, __LINE__
,
3912 "another breakpoint was inserted on top of "
3913 "a permanent breakpoint");
3922 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
3923 int bnum
, int have_bnum
)
3928 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
3929 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
3931 warning ("Breakpoint %d address previously adjusted from %s to %s.",
3932 bnum
, astr1
, astr2
);
3934 warning ("Breakpoint address adjusted from %s to %s.", astr1
, astr2
);
3937 /* Adjust a breakpoint's address to account for architectural constraints
3938 on breakpoint placement. Return the adjusted address. Note: Very
3939 few targets require this kind of adjustment. For most targets,
3940 this function is simply the identity function. */
3943 adjust_breakpoint_address (CORE_ADDR bpaddr
, enum bptype bptype
)
3945 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
3947 /* Very few targets need any kind of breakpoint adjustment. */
3950 else if (bptype
== bp_watchpoint
3951 || bptype
== bp_hardware_watchpoint
3952 || bptype
== bp_read_watchpoint
3953 || bptype
== bp_access_watchpoint
3954 || bptype
== bp_catch_fork
3955 || bptype
== bp_catch_vfork
3956 || bptype
== bp_catch_exec
)
3958 /* Watchpoints and the various bp_catch_* eventpoints should not
3959 have their addresses modified. */
3964 CORE_ADDR adjusted_bpaddr
;
3966 /* Some targets have architectural constraints on the placement
3967 of breakpoint instructions. Obtain the adjusted address. */
3968 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
3971 /* An adjusted breakpoint address can significantly alter
3972 a user's expectations. Print a warning if an adjustment
3974 if (adjusted_bpaddr
!= bpaddr
)
3975 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
3977 return adjusted_bpaddr
;
3981 /* Allocate a struct bp_location. */
3983 static struct bp_location
*
3984 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
)
3986 struct bp_location
*loc
, *loc_p
;
3988 loc
= xmalloc (sizeof (struct bp_location
));
3989 memset (loc
, 0, sizeof (*loc
));
3999 case bp_longjmp_resume
:
4000 case bp_step_resume
:
4001 case bp_through_sigtramp
:
4002 case bp_watchpoint_scope
:
4004 case bp_shlib_event
:
4005 case bp_thread_event
:
4006 case bp_overlay_event
:
4008 case bp_catch_unload
:
4009 loc
->loc_type
= bp_loc_software_breakpoint
;
4011 case bp_hardware_breakpoint
:
4012 loc
->loc_type
= bp_loc_hardware_breakpoint
;
4014 case bp_hardware_watchpoint
:
4015 case bp_read_watchpoint
:
4016 case bp_access_watchpoint
:
4017 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4021 case bp_catch_vfork
:
4023 case bp_catch_catch
:
4024 case bp_catch_throw
:
4025 loc
->loc_type
= bp_loc_other
;
4028 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
4031 /* Add this breakpoint to the end of the chain. */
4033 loc_p
= bp_location_chain
;
4035 bp_location_chain
= loc
;
4039 loc_p
= loc_p
->next
;
4046 /* set_raw_breakpoint() is a low level routine for allocating and
4047 partially initializing a breakpoint of type BPTYPE. The newly
4048 created breakpoint's address, section, source file name, and line
4049 number are provided by SAL. The newly created and partially
4050 initialized breakpoint is added to the breakpoint chain and
4051 is also returned as the value of this function.
4053 It is expected that the caller will complete the initialization of
4054 the newly created breakpoint struct as well as output any status
4055 information regarding the creation of a new breakpoint. In
4056 particular, set_raw_breakpoint() does NOT set the breakpoint
4057 number! Care should be taken to not allow an error() to occur
4058 prior to completing the initialization of the breakpoint. If this
4059 should happen, a bogus breakpoint will be left on the chain. */
4062 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4064 struct breakpoint
*b
, *b1
;
4066 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4067 memset (b
, 0, sizeof (*b
));
4068 b
->loc
= allocate_bp_location (b
, bptype
);
4069 b
->loc
->requested_address
= sal
.pc
;
4070 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
,
4072 if (sal
.symtab
== NULL
)
4073 b
->source_file
= NULL
;
4075 b
->source_file
= savestring (sal
.symtab
->filename
,
4076 strlen (sal
.symtab
->filename
));
4077 b
->loc
->section
= sal
.section
;
4079 b
->language
= current_language
->la_language
;
4080 b
->input_radix
= input_radix
;
4082 b
->line_number
= sal
.line
;
4083 b
->enable_state
= bp_enabled
;
4086 b
->ignore_count
= 0;
4088 b
->frame_id
= null_frame_id
;
4089 b
->dll_pathname
= NULL
;
4090 b
->triggered_dll_pathname
= NULL
;
4091 b
->forked_inferior_pid
= 0;
4092 b
->exec_pathname
= NULL
;
4096 /* Add this breakpoint to the end of the chain
4097 so that a list of breakpoints will come out in order
4098 of increasing numbers. */
4100 b1
= breakpoint_chain
;
4102 breakpoint_chain
= b
;
4110 check_duplicates (b
);
4111 breakpoints_changed ();
4117 /* Note that the breakpoint object B describes a permanent breakpoint
4118 instruction, hard-wired into the inferior's code. */
4120 make_breakpoint_permanent (struct breakpoint
*b
)
4122 b
->enable_state
= bp_permanent
;
4124 /* By definition, permanent breakpoints are already present in the code. */
4125 b
->loc
->inserted
= 1;
4128 static struct breakpoint
*
4129 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4131 static int internal_breakpoint_number
= -1;
4132 struct symtab_and_line sal
;
4133 struct breakpoint
*b
;
4135 init_sal (&sal
); /* initialize to zeroes */
4138 sal
.section
= find_pc_overlay (sal
.pc
);
4140 b
= set_raw_breakpoint (sal
, type
);
4141 b
->number
= internal_breakpoint_number
--;
4142 b
->disposition
= disp_donttouch
;
4149 create_longjmp_breakpoint (char *func_name
)
4151 struct breakpoint
*b
;
4152 struct minimal_symbol
*m
;
4154 if (func_name
== NULL
)
4155 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
4158 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4161 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4164 b
->enable_state
= bp_disabled
;
4167 b
->addr_string
= xstrdup (func_name
);
4170 /* Call this routine when stepping and nexting to enable a breakpoint
4171 if we do a longjmp(). When we hit that breakpoint, call
4172 set_longjmp_resume_breakpoint() to figure out where we are going. */
4175 enable_longjmp_breakpoint (void)
4177 struct breakpoint
*b
;
4180 if (b
->type
== bp_longjmp
)
4182 b
->enable_state
= bp_enabled
;
4183 check_duplicates (b
);
4188 disable_longjmp_breakpoint (void)
4190 struct breakpoint
*b
;
4193 if (b
->type
== bp_longjmp
4194 || b
->type
== bp_longjmp_resume
)
4196 b
->enable_state
= bp_disabled
;
4197 check_duplicates (b
);
4202 create_overlay_event_breakpoint (char *func_name
)
4204 struct breakpoint
*b
;
4205 struct minimal_symbol
*m
;
4207 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4210 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4212 b
->addr_string
= xstrdup (func_name
);
4214 if (overlay_debugging
== ovly_auto
)
4216 b
->enable_state
= bp_enabled
;
4217 overlay_events_enabled
= 1;
4221 b
->enable_state
= bp_disabled
;
4222 overlay_events_enabled
= 0;
4227 enable_overlay_breakpoints (void)
4229 struct breakpoint
*b
;
4232 if (b
->type
== bp_overlay_event
)
4234 b
->enable_state
= bp_enabled
;
4235 check_duplicates (b
);
4236 overlay_events_enabled
= 1;
4241 disable_overlay_breakpoints (void)
4243 struct breakpoint
*b
;
4246 if (b
->type
== bp_overlay_event
)
4248 b
->enable_state
= bp_disabled
;
4249 check_duplicates (b
);
4250 overlay_events_enabled
= 0;
4255 create_thread_event_breakpoint (CORE_ADDR address
)
4257 struct breakpoint
*b
;
4259 b
= create_internal_breakpoint (address
, bp_thread_event
);
4261 b
->enable_state
= bp_enabled
;
4262 /* addr_string has to be used or breakpoint_re_set will delete me. */
4263 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4269 remove_thread_event_breakpoints (void)
4271 struct breakpoint
*b
, *temp
;
4273 ALL_BREAKPOINTS_SAFE (b
, temp
)
4274 if (b
->type
== bp_thread_event
)
4275 delete_breakpoint (b
);
4278 struct captured_parse_breakpoint_args
4281 struct symtabs_and_lines
*sals_p
;
4282 char ***addr_string_p
;
4286 struct lang_and_radix
4292 /* Cleanup helper routine to restore the current language and
4295 do_restore_lang_radix_cleanup (void *old
)
4297 struct lang_and_radix
*p
= old
;
4298 set_language (p
->lang
);
4299 input_radix
= p
->radix
;
4302 /* Try and resolve a pending breakpoint. */
4304 resolve_pending_breakpoint (struct breakpoint
*b
)
4306 /* Try and reparse the breakpoint in case the shared library
4308 struct symtabs_and_lines sals
;
4309 struct symtab_and_line pending_sal
;
4310 char **cond_string
= (char **) NULL
;
4311 char *copy_arg
= b
->addr_string
;
4316 struct ui_file
*old_gdb_stderr
;
4317 struct lang_and_radix old_lr
;
4318 struct cleanup
*old_chain
;
4320 /* Set language, input-radix, then reissue breakpoint command.
4321 Ensure the language and input-radix are restored afterwards. */
4322 old_lr
.lang
= current_language
->la_language
;
4323 old_lr
.radix
= input_radix
;
4324 old_chain
= make_cleanup (do_restore_lang_radix_cleanup
, &old_lr
);
4326 set_language (b
->language
);
4327 input_radix
= b
->input_radix
;
4328 rc
= break_command_1 (b
->addr_string
, b
->flag
, b
->from_tty
, b
);
4330 if (rc
== GDB_RC_OK
)
4331 /* Pending breakpoint has been resolved. */
4332 printf_filtered ("Pending breakpoint \"%s\" resolved\n", b
->addr_string
);
4334 do_cleanups (old_chain
);
4340 remove_solib_event_breakpoints (void)
4342 struct breakpoint
*b
, *temp
;
4344 ALL_BREAKPOINTS_SAFE (b
, temp
)
4345 if (b
->type
== bp_shlib_event
)
4346 delete_breakpoint (b
);
4350 create_solib_event_breakpoint (CORE_ADDR address
)
4352 struct breakpoint
*b
;
4354 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4358 /* Disable any breakpoints that are on code in shared libraries. Only
4359 apply to enabled breakpoints, disabled ones can just stay disabled. */
4362 disable_breakpoints_in_shlibs (int silent
)
4364 struct breakpoint
*b
;
4365 int disabled_shlib_breaks
= 0;
4367 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4370 #if defined (PC_SOLIB)
4371 if (((b
->type
== bp_breakpoint
) ||
4372 (b
->type
== bp_hardware_breakpoint
)) &&
4373 breakpoint_enabled (b
) &&
4374 !b
->loc
->duplicate
&&
4375 PC_SOLIB (b
->loc
->address
))
4377 b
->enable_state
= bp_shlib_disabled
;
4380 if (!disabled_shlib_breaks
)
4382 target_terminal_ours_for_output ();
4383 warning ("Temporarily disabling shared library breakpoints:");
4385 disabled_shlib_breaks
= 1;
4386 warning ("breakpoint #%d ", b
->number
);
4393 /* Disable any breakpoints that are in in an unloaded shared library. Only
4394 apply to enabled breakpoints, disabled ones can just stay disabled. */
4397 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
4399 struct breakpoint
*b
;
4400 int disabled_shlib_breaks
= 0;
4402 #if defined (PC_SOLIB)
4403 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4406 if ((b
->loc
->loc_type
== bp_loc_hardware_breakpoint
4407 || b
->loc
->loc_type
== bp_loc_software_breakpoint
)
4408 && breakpoint_enabled (b
)
4409 && !b
->loc
->duplicate
)
4411 char *so_name
= PC_SOLIB (b
->loc
->address
);
4413 && !strcmp (so_name
, solib
->so_name
))
4415 b
->enable_state
= bp_shlib_disabled
;
4416 /* At this point, we cannot rely on remove_breakpoint
4417 succeeding so we must mark the breakpoint as not inserted
4418 to prevent future errors occurring in remove_breakpoints. */
4419 b
->loc
->inserted
= 0;
4420 if (!disabled_shlib_breaks
)
4422 target_terminal_ours_for_output ();
4423 warning ("Temporarily disabling breakpoints for unloaded shared library \"%s\"",
4426 disabled_shlib_breaks
= 1;
4433 /* Try to reenable any breakpoints in shared libraries. */
4435 re_enable_breakpoints_in_shlibs (void)
4437 struct breakpoint
*b
, *tmp
;
4439 ALL_BREAKPOINTS_SAFE (b
, tmp
)
4441 if (b
->enable_state
== bp_shlib_disabled
)
4445 /* Do not reenable the breakpoint if the shared library
4446 is still not mapped in. */
4447 lib
= PC_SOLIB (b
->loc
->address
);
4448 if (lib
!= NULL
&& target_read_memory (b
->loc
->address
, buf
, 1) == 0)
4449 b
->enable_state
= bp_enabled
;
4451 else if (b
->pending
&& (b
->enable_state
== bp_enabled
))
4453 if (resolve_pending_breakpoint (b
) == GDB_RC_OK
)
4454 delete_breakpoint (b
);
4462 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
4463 char *cond_string
, enum bptype bp_kind
)
4465 struct breakpoint
*b
;
4466 struct symtabs_and_lines sals
;
4467 struct cleanup
*old_chain
;
4468 struct cleanup
*canonical_strings_chain
= NULL
;
4469 char *addr_start
= hookname
;
4470 char *addr_end
= NULL
;
4471 char **canonical
= (char **) NULL
;
4472 int thread
= -1; /* All threads. */
4474 /* Set a breakpoint on the specified hook. */
4475 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
, 0, &canonical
, NULL
);
4476 addr_end
= hookname
;
4478 if (sals
.nelts
== 0)
4480 warning ("Unable to set a breakpoint on dynamic linker callback.");
4481 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4482 warning ("GDB will be unable to track shl_load/shl_unload calls");
4485 if (sals
.nelts
!= 1)
4487 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4488 warning ("GDB will be unable to track shl_load/shl_unload calls");
4492 /* Make sure that all storage allocated in decode_line_1 gets freed
4493 in case the following errors out. */
4494 old_chain
= make_cleanup (xfree
, sals
.sals
);
4495 if (canonical
!= (char **) NULL
)
4497 make_cleanup (xfree
, canonical
);
4498 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
4499 if (canonical
[0] != NULL
)
4500 make_cleanup (xfree
, canonical
[0]);
4503 resolve_sal_pc (&sals
.sals
[0]);
4505 /* Remove the canonical strings from the cleanup, they are needed below. */
4506 if (canonical
!= (char **) NULL
)
4507 discard_cleanups (canonical_strings_chain
);
4509 b
= set_raw_breakpoint (sals
.sals
[0], bp_kind
);
4510 set_breakpoint_count (breakpoint_count
+ 1);
4511 b
->number
= breakpoint_count
;
4513 b
->cond_string
= (cond_string
== NULL
) ?
4514 NULL
: savestring (cond_string
, strlen (cond_string
));
4517 if (canonical
!= (char **) NULL
&& canonical
[0] != NULL
)
4518 b
->addr_string
= canonical
[0];
4519 else if (addr_start
)
4520 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
4522 b
->enable_state
= bp_enabled
;
4523 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4525 if (dll_pathname
== NULL
)
4526 b
->dll_pathname
= NULL
;
4529 b
->dll_pathname
= (char *) xmalloc (strlen (dll_pathname
) + 1);
4530 strcpy (b
->dll_pathname
, dll_pathname
);
4534 do_cleanups (old_chain
);
4538 create_solib_load_event_breakpoint (char *hookname
, int tempflag
,
4539 char *dll_pathname
, char *cond_string
)
4541 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4542 cond_string
, bp_catch_load
);
4546 create_solib_unload_event_breakpoint (char *hookname
, int tempflag
,
4547 char *dll_pathname
, char *cond_string
)
4549 solib_load_unload_1 (hookname
,tempflag
, dll_pathname
,
4550 cond_string
, bp_catch_unload
);
4554 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4555 enum bptype bp_kind
)
4557 struct symtab_and_line sal
;
4558 struct breakpoint
*b
;
4559 int thread
= -1; /* All threads. */
4566 b
= set_raw_breakpoint (sal
, bp_kind
);
4567 set_breakpoint_count (breakpoint_count
+ 1);
4568 b
->number
= breakpoint_count
;
4570 b
->cond_string
= (cond_string
== NULL
) ?
4571 NULL
: savestring (cond_string
, strlen (cond_string
));
4573 b
->addr_string
= NULL
;
4574 b
->enable_state
= bp_enabled
;
4575 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4576 b
->forked_inferior_pid
= 0;
4582 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4584 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4588 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4590 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4594 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4596 struct symtab_and_line sal
;
4597 struct breakpoint
*b
;
4598 int thread
= -1; /* All threads. */
4605 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4606 set_breakpoint_count (breakpoint_count
+ 1);
4607 b
->number
= breakpoint_count
;
4609 b
->cond_string
= (cond_string
== NULL
) ?
4610 NULL
: savestring (cond_string
, strlen (cond_string
));
4612 b
->addr_string
= NULL
;
4613 b
->enable_state
= bp_enabled
;
4614 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4620 hw_breakpoint_used_count (void)
4622 struct breakpoint
*b
;
4627 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4635 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4637 struct breakpoint
*b
;
4640 *other_type_used
= 0;
4643 if (breakpoint_enabled (b
))
4645 if (b
->type
== type
)
4647 else if ((b
->type
== bp_hardware_watchpoint
||
4648 b
->type
== bp_read_watchpoint
||
4649 b
->type
== bp_access_watchpoint
))
4650 *other_type_used
= 1;
4656 /* Call this after hitting the longjmp() breakpoint. Use this to set
4657 a new breakpoint at the target of the jmp_buf.
4659 FIXME - This ought to be done by setting a temporary breakpoint
4660 that gets deleted automatically... */
4663 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_id frame_id
)
4665 struct breakpoint
*b
;
4668 if (b
->type
== bp_longjmp_resume
)
4670 b
->loc
->requested_address
= pc
;
4671 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
,
4673 b
->enable_state
= bp_enabled
;
4674 b
->frame_id
= frame_id
;
4675 check_duplicates (b
);
4681 disable_watchpoints_before_interactive_call_start (void)
4683 struct breakpoint
*b
;
4687 if (((b
->type
== bp_watchpoint
)
4688 || (b
->type
== bp_hardware_watchpoint
)
4689 || (b
->type
== bp_read_watchpoint
)
4690 || (b
->type
== bp_access_watchpoint
)
4691 || ep_is_exception_catchpoint (b
))
4692 && breakpoint_enabled (b
))
4694 b
->enable_state
= bp_call_disabled
;
4695 check_duplicates (b
);
4701 enable_watchpoints_after_interactive_call_stop (void)
4703 struct breakpoint
*b
;
4707 if (((b
->type
== bp_watchpoint
)
4708 || (b
->type
== bp_hardware_watchpoint
)
4709 || (b
->type
== bp_read_watchpoint
)
4710 || (b
->type
== bp_access_watchpoint
)
4711 || ep_is_exception_catchpoint (b
))
4712 && (b
->enable_state
== bp_call_disabled
))
4714 b
->enable_state
= bp_enabled
;
4715 check_duplicates (b
);
4721 /* Set a breakpoint that will evaporate an end of command
4722 at address specified by SAL.
4723 Restrict it to frame FRAME if FRAME is nonzero. */
4726 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4729 struct breakpoint
*b
;
4730 b
= set_raw_breakpoint (sal
, type
);
4731 b
->enable_state
= bp_enabled
;
4732 b
->disposition
= disp_donttouch
;
4733 b
->frame_id
= frame_id
;
4735 /* If we're debugging a multi-threaded program, then we
4736 want momentary breakpoints to be active in only a
4737 single thread of control. */
4738 if (in_thread_list (inferior_ptid
))
4739 b
->thread
= pid_to_thread_id (inferior_ptid
);
4745 /* Tell the user we have just set a breakpoint B. */
4748 mention (struct breakpoint
*b
)
4751 struct cleanup
*old_chain
, *ui_out_chain
;
4752 struct ui_stream
*stb
;
4754 stb
= ui_out_stream_new (uiout
);
4755 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4757 /* FIXME: This is misplaced; mention() is called by things (like
4758 hitting a watchpoint) other than breakpoint creation. It should
4759 be possible to clean this up and at the same time replace the
4760 random calls to breakpoint_changed with this hook, as has already
4761 been done for deprecated_delete_breakpoint_hook and so on. */
4762 if (deprecated_create_breakpoint_hook
)
4763 deprecated_create_breakpoint_hook (b
);
4764 breakpoint_create_event (b
->number
);
4766 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4767 b
->ops
->print_mention (b
);
4772 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b
->number
);
4775 ui_out_text (uiout
, "Watchpoint ");
4776 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4777 ui_out_field_int (uiout
, "number", b
->number
);
4778 ui_out_text (uiout
, ": ");
4779 print_expression (b
->exp
, stb
->stream
);
4780 ui_out_field_stream (uiout
, "exp", stb
);
4781 do_cleanups (ui_out_chain
);
4783 case bp_hardware_watchpoint
:
4784 ui_out_text (uiout
, "Hardware watchpoint ");
4785 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4786 ui_out_field_int (uiout
, "number", b
->number
);
4787 ui_out_text (uiout
, ": ");
4788 print_expression (b
->exp
, stb
->stream
);
4789 ui_out_field_stream (uiout
, "exp", stb
);
4790 do_cleanups (ui_out_chain
);
4792 case bp_read_watchpoint
:
4793 ui_out_text (uiout
, "Hardware read watchpoint ");
4794 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4795 ui_out_field_int (uiout
, "number", b
->number
);
4796 ui_out_text (uiout
, ": ");
4797 print_expression (b
->exp
, stb
->stream
);
4798 ui_out_field_stream (uiout
, "exp", stb
);
4799 do_cleanups (ui_out_chain
);
4801 case bp_access_watchpoint
:
4802 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4803 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4804 ui_out_field_int (uiout
, "number", b
->number
);
4805 ui_out_text (uiout
, ": ");
4806 print_expression (b
->exp
, stb
->stream
);
4807 ui_out_field_stream (uiout
, "exp", stb
);
4808 do_cleanups (ui_out_chain
);
4811 if (ui_out_is_mi_like_p (uiout
))
4816 printf_filtered ("Breakpoint %d", b
->number
);
4819 case bp_hardware_breakpoint
:
4820 if (ui_out_is_mi_like_p (uiout
))
4825 printf_filtered ("Hardware assisted breakpoint %d", b
->number
);
4829 case bp_catch_unload
:
4830 printf_filtered ("Catchpoint %d (%s %s)",
4832 (b
->type
== bp_catch_load
) ? "load" : "unload",
4833 (b
->dll_pathname
!= NULL
) ?
4834 b
->dll_pathname
: "<any library>");
4837 case bp_catch_vfork
:
4838 printf_filtered ("Catchpoint %d (%s)",
4840 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4843 printf_filtered ("Catchpoint %d (exec)",
4846 case bp_catch_catch
:
4847 case bp_catch_throw
:
4848 printf_filtered ("Catchpoint %d (%s)",
4850 (b
->type
== bp_catch_catch
) ? "catch" : "throw");
4856 case bp_longjmp_resume
:
4857 case bp_step_resume
:
4858 case bp_through_sigtramp
:
4860 case bp_watchpoint_scope
:
4861 case bp_shlib_event
:
4862 case bp_thread_event
:
4863 case bp_overlay_event
:
4871 printf_filtered (" (%s) pending.", b
->addr_string
);
4875 if (addressprint
|| b
->source_file
== NULL
)
4877 printf_filtered (" at ");
4878 print_address_numeric (b
->loc
->address
, 1, gdb_stdout
);
4881 printf_filtered (": file %s, line %d.",
4882 b
->source_file
, b
->line_number
);
4885 do_cleanups (old_chain
);
4886 if (ui_out_is_mi_like_p (uiout
))
4888 printf_filtered ("\n");
4892 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4893 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4894 COND[i] and COND_STRING[i] values.
4896 The parameter PENDING_BP points to a pending breakpoint that is
4897 the basis of the breakpoints currently being created. The pending
4898 breakpoint may contain a separate condition string or commands
4899 that were added after the initial pending breakpoint was created.
4901 NOTE: If the function succeeds, the caller is expected to cleanup
4902 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4903 array contents). If the function fails (error() is called), the
4904 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4905 COND and SALS arrays and each of those arrays contents. */
4908 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
4909 struct expression
**cond
, char **cond_string
,
4910 enum bptype type
, enum bpdisp disposition
,
4911 int thread
, int ignore_count
, int from_tty
,
4912 struct breakpoint
*pending_bp
)
4914 if (type
== bp_hardware_breakpoint
)
4916 int i
= hw_breakpoint_used_count ();
4917 int target_resources_ok
=
4918 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
4920 if (target_resources_ok
== 0)
4921 error ("No hardware breakpoint support in the target.");
4922 else if (target_resources_ok
< 0)
4923 error ("Hardware breakpoints used exceeds limit.");
4926 /* Now set all the breakpoints. */
4929 for (i
= 0; i
< sals
.nelts
; i
++)
4931 struct breakpoint
*b
;
4932 struct symtab_and_line sal
= sals
.sals
[i
];
4935 describe_other_breakpoints (sal
.pc
, sal
.section
);
4937 b
= set_raw_breakpoint (sal
, type
);
4938 set_breakpoint_count (breakpoint_count
+ 1);
4939 b
->number
= breakpoint_count
;
4943 b
->addr_string
= addr_string
[i
];
4945 /* addr_string has to be used or breakpoint_re_set will delete
4947 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4948 b
->cond_string
= cond_string
[i
];
4949 b
->ignore_count
= ignore_count
;
4950 b
->enable_state
= bp_enabled
;
4951 b
->disposition
= disposition
;
4952 /* If resolving a pending breakpoint, a check must be made to see if
4953 the user has specified a new condition or commands for the
4954 breakpoint. A new condition will override any condition that was
4955 initially specified with the initial breakpoint command. */
4959 if (pending_bp
->cond_string
)
4961 arg
= pending_bp
->cond_string
;
4962 b
->cond_string
= savestring (arg
, strlen (arg
));
4963 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->loc
->address
), 0);
4965 error ("Junk at end of pending breakpoint condition expression");
4967 /* If there are commands associated with the breakpoint, they should
4969 if (pending_bp
->commands
)
4970 b
->commands
= copy_command_lines (pending_bp
->commands
);
4972 /* We have to copy over the ignore_count and thread as well. */
4973 b
->ignore_count
= pending_bp
->ignore_count
;
4974 b
->thread
= pending_bp
->thread
;
4981 /* Parse ARG which is assumed to be a SAL specification possibly
4982 followed by conditionals. On return, SALS contains an array of SAL
4983 addresses found. ADDR_STRING contains a vector of (canonical)
4984 address strings. ARG points to the end of the SAL. */
4987 parse_breakpoint_sals (char **address
,
4988 struct symtabs_and_lines
*sals
,
4989 char ***addr_string
,
4992 char *addr_start
= *address
;
4993 *addr_string
= NULL
;
4994 /* If no arg given, or if first arg is 'if ', use the default
4996 if ((*address
) == NULL
4997 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
4999 if (default_breakpoint_valid
)
5001 struct symtab_and_line sal
;
5002 init_sal (&sal
); /* initialize to zeroes */
5003 sals
->sals
= (struct symtab_and_line
*)
5004 xmalloc (sizeof (struct symtab_and_line
));
5005 sal
.pc
= default_breakpoint_address
;
5006 sal
.line
= default_breakpoint_line
;
5007 sal
.symtab
= default_breakpoint_symtab
;
5008 sal
.section
= find_pc_overlay (sal
.pc
);
5009 sals
->sals
[0] = sal
;
5013 error ("No default breakpoint address now.");
5017 /* Force almost all breakpoints to be in terms of the
5018 current_source_symtab (which is decode_line_1's default). This
5019 should produce the results we want almost all of the time while
5020 leaving default_breakpoint_* alone.
5021 ObjC: However, don't match an Objective-C method name which
5022 may have a '+' or '-' succeeded by a '[' */
5024 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
5026 if (default_breakpoint_valid
5028 || ((strchr ("+-", (*address
)[0]) != NULL
)
5029 && ((*address
)[1] != '['))))
5030 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
5031 default_breakpoint_line
, addr_string
,
5034 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0,
5035 addr_string
, not_found_ptr
);
5037 /* For any SAL that didn't have a canonical string, fill one in. */
5038 if (sals
->nelts
> 0 && *addr_string
== NULL
)
5039 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
5040 if (addr_start
!= (*address
))
5043 for (i
= 0; i
< sals
->nelts
; i
++)
5045 /* Add the string if not present. */
5046 if ((*addr_string
)[i
] == NULL
)
5047 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
5053 /* Convert each SAL into a real PC. Verify that the PC can be
5054 inserted as a breakpoint. If it can't throw an error. */
5057 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
5061 for (i
= 0; i
< sals
->nelts
; i
++)
5063 resolve_sal_pc (&sals
->sals
[i
]);
5065 /* It's possible for the PC to be nonzero, but still an illegal
5066 value on some targets.
5068 For example, on HP-UX if you start gdb, and before running the
5069 inferior you try to set a breakpoint on a shared library function
5070 "foo" where the inferior doesn't call "foo" directly but does
5071 pass its address to another function call, then we do find a
5072 minimal symbol for the "foo", but it's address is invalid.
5073 (Appears to be an index into a table that the loader sets up
5074 when the inferior is run.)
5076 Give the target a chance to bless sals.sals[i].pc before we
5077 try to make a breakpoint for it. */
5078 #ifdef DEPRECATED_PC_REQUIRES_RUN_BEFORE_USE
5079 if (DEPRECATED_PC_REQUIRES_RUN_BEFORE_USE (sals
->sals
[i
].pc
))
5081 if (address
== NULL
)
5082 error ("Cannot break without a running program.");
5084 error ("Cannot break on %s without a running program.",
5092 do_captured_parse_breakpoint (struct ui_out
*ui
, void *data
)
5094 struct captured_parse_breakpoint_args
*args
= data
;
5096 parse_breakpoint_sals (args
->arg_p
, args
->sals_p
, args
->addr_string_p
,
5097 args
->not_found_ptr
);
5102 /* Set a breakpoint according to ARG (function, linenum or *address)
5103 flag: first bit : 0 non-temporary, 1 temporary.
5104 second bit : 0 normal breakpoint, 1 hardware breakpoint.
5106 PENDING_BP is non-NULL when this function is being called to resolve
5107 a pending breakpoint. */
5110 break_command_1 (char *arg
, int flag
, int from_tty
, struct breakpoint
*pending_bp
)
5112 int tempflag
, hardwareflag
;
5113 struct symtabs_and_lines sals
;
5114 struct expression
**cond
= 0;
5115 struct symtab_and_line pending_sal
;
5116 char **cond_string
= (char **) NULL
;
5119 char *addr_start
= arg
;
5121 struct cleanup
*old_chain
;
5122 struct cleanup
*breakpoint_chain
= NULL
;
5123 struct captured_parse_breakpoint_args parse_args
;
5127 int ignore_count
= 0;
5130 hardwareflag
= flag
& BP_HARDWAREFLAG
;
5131 tempflag
= flag
& BP_TEMPFLAG
;
5137 parse_args
.arg_p
= &arg
;
5138 parse_args
.sals_p
= &sals
;
5139 parse_args
.addr_string_p
= &addr_string
;
5140 parse_args
.not_found_ptr
= ¬_found
;
5142 rc
= catch_exceptions_with_msg (uiout
, do_captured_parse_breakpoint
,
5143 &parse_args
, NULL
, &err_msg
,
5146 /* If caller is interested in rc value from parse, set value. */
5148 if (rc
!= GDB_RC_OK
)
5150 /* Check for file or function not found. */
5153 /* If called to resolve pending breakpoint, just return error code. */
5157 error_output_message (NULL
, err_msg
);
5160 /* If pending breakpoint support is turned off, throw error. */
5162 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
5163 throw_exception (RETURN_ERROR
);
5165 /* If pending breakpoint support is auto query and the user selects
5166 no, then simply return the error code. */
5167 if (pending_break_support
== AUTO_BOOLEAN_AUTO
&&
5168 !nquery ("Make breakpoint pending on future shared library load? "))
5171 /* At this point, either the user was queried about setting a
5172 pending breakpoint and selected yes, or pending breakpoint
5173 behavior is on and thus a pending breakpoint is defaulted
5174 on behalf of the user. */
5175 copy_arg
= xstrdup (addr_start
);
5176 addr_string
= ©_arg
;
5178 sals
.sals
= &pending_sal
;
5185 else if (!sals
.nelts
)
5188 /* Create a chain of things that always need to be cleaned up. */
5189 old_chain
= make_cleanup (null_cleanup
, 0);
5193 /* Make sure that all storage allocated to SALS gets freed. */
5194 make_cleanup (xfree
, sals
.sals
);
5196 /* Cleanup the addr_string array but not its contents. */
5197 make_cleanup (xfree
, addr_string
);
5200 /* Allocate space for all the cond expressions. */
5201 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5202 make_cleanup (xfree
, cond
);
5204 /* Allocate space for all the cond strings. */
5205 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5206 make_cleanup (xfree
, cond_string
);
5208 /* ----------------------------- SNIP -----------------------------
5209 Anything added to the cleanup chain beyond this point is assumed
5210 to be part of a breakpoint. If the breakpoint create succeeds
5211 then the memory is not reclaimed. */
5212 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5214 /* Mark the contents of the addr_string for cleanup. These go on
5215 the breakpoint_chain and only occure if the breakpoint create
5217 for (i
= 0; i
< sals
.nelts
; i
++)
5219 if (addr_string
[i
] != NULL
)
5220 make_cleanup (xfree
, addr_string
[i
]);
5223 /* Resolve all line numbers to PC's and verify that the addresses
5224 are ok for the target. */
5226 breakpoint_sals_to_pc (&sals
, addr_start
);
5228 /* Verify that condition can be parsed, before setting any
5229 breakpoints. Allocate a separate condition expression for each
5231 thread
= -1; /* No specific thread yet */
5234 for (i
= 0; i
< sals
.nelts
; i
++)
5241 char *cond_start
= NULL
;
5242 char *cond_end
= NULL
;
5243 while (*tok
== ' ' || *tok
== '\t')
5248 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5251 toklen
= end_tok
- tok
;
5253 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5255 tok
= cond_start
= end_tok
+ 1;
5256 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
),
5258 make_cleanup (xfree
, cond
[i
]);
5260 cond_string
[i
] = savestring (cond_start
,
5261 cond_end
- cond_start
);
5262 make_cleanup (xfree
, cond_string
[i
]);
5264 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5270 thread
= strtol (tok
, &tok
, 0);
5272 error ("Junk after thread keyword.");
5273 if (!valid_thread_id (thread
))
5274 error ("Unknown thread %d\n", thread
);
5277 error ("Junk at end of arguments.");
5280 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5281 hardwareflag
? bp_hardware_breakpoint
5283 tempflag
? disp_del
: disp_donttouch
,
5284 thread
, ignore_count
, from_tty
,
5289 struct symtab_and_line sal
;
5290 struct breakpoint
*b
;
5295 make_cleanup (xfree
, copy_arg
);
5297 b
= set_raw_breakpoint (sal
, hardwareflag
? bp_hardware_breakpoint
5299 set_breakpoint_count (breakpoint_count
+ 1);
5300 b
->number
= breakpoint_count
;
5303 b
->addr_string
= *addr_string
;
5304 b
->cond_string
= *cond_string
;
5305 b
->ignore_count
= ignore_count
;
5307 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5308 b
->from_tty
= from_tty
;
5315 warning ("Multiple breakpoints were set.");
5316 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5318 /* That's it. Discard the cleanups for data inserted into the
5320 discard_cleanups (breakpoint_chain
);
5321 /* But cleanup everything else. */
5322 do_cleanups (old_chain
);
5327 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
5328 linenum or *address) with COND and IGNORE_COUNT. */
5330 struct captured_breakpoint_args
5341 do_captured_breakpoint (void *data
)
5343 struct captured_breakpoint_args
*args
= data
;
5344 struct symtabs_and_lines sals
;
5345 struct expression
**cond
;
5346 struct cleanup
*old_chain
;
5347 struct cleanup
*breakpoint_chain
= NULL
;
5354 /* Parse the source and lines spec. Delay check that the expression
5355 didn't contain trailing garbage until after cleanups are in
5359 address_end
= args
->address
;
5361 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
, 0);
5366 /* Create a chain of things at always need to be cleaned up. */
5367 old_chain
= make_cleanup (null_cleanup
, 0);
5369 /* Always have a addr_string array, even if it is empty. */
5370 make_cleanup (xfree
, addr_string
);
5372 /* Make sure that all storage allocated to SALS gets freed. */
5373 make_cleanup (xfree
, sals
.sals
);
5375 /* Allocate space for all the cond expressions. */
5376 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5377 make_cleanup (xfree
, cond
);
5379 /* Allocate space for all the cond strings. */
5380 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5381 make_cleanup (xfree
, cond_string
);
5383 /* ----------------------------- SNIP -----------------------------
5384 Anything added to the cleanup chain beyond this point is assumed
5385 to be part of a breakpoint. If the breakpoint create goes
5386 through then that memory is not cleaned up. */
5387 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5389 /* Mark the contents of the addr_string for cleanup. These go on
5390 the breakpoint_chain and only occure if the breakpoint create
5392 for (i
= 0; i
< sals
.nelts
; i
++)
5394 if (addr_string
[i
] != NULL
)
5395 make_cleanup (xfree
, addr_string
[i
]);
5398 /* Wait until now before checking for garbage at the end of the
5399 address. That way cleanups can take care of freeing any
5401 if (*address_end
!= '\0')
5402 error ("Garbage %s following breakpoint address", address_end
);
5404 /* Resolve all line numbers to PC's. */
5405 breakpoint_sals_to_pc (&sals
, args
->address
);
5407 /* Verify that conditions can be parsed, before setting any
5409 for (i
= 0; i
< sals
.nelts
; i
++)
5411 if (args
->condition
!= NULL
)
5413 char *tok
= args
->condition
;
5414 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
5416 error ("Garbage %s follows condition", tok
);
5417 make_cleanup (xfree
, cond
[i
]);
5418 cond_string
[i
] = xstrdup (args
->condition
);
5422 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5423 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
5424 args
->tempflag
? disp_del
: disp_donttouch
,
5425 args
->thread
, args
->ignore_count
, 0/*from-tty*/,
5426 NULL
/*pending_bp*/);
5428 /* That's it. Discard the cleanups for data inserted into the
5430 discard_cleanups (breakpoint_chain
);
5431 /* But cleanup everything else. */
5432 do_cleanups (old_chain
);
5437 gdb_breakpoint (char *address
, char *condition
,
5438 int hardwareflag
, int tempflag
,
5439 int thread
, int ignore_count
)
5441 struct captured_breakpoint_args args
;
5442 args
.address
= address
;
5443 args
.condition
= condition
;
5444 args
.hardwareflag
= hardwareflag
;
5445 args
.tempflag
= tempflag
;
5446 args
.thread
= thread
;
5447 args
.ignore_count
= ignore_count
;
5448 return catch_errors (do_captured_breakpoint
, &args
,
5449 NULL
, RETURN_MASK_ALL
);
5454 break_at_finish_at_depth_command_1 (char *arg
, int flag
, int from_tty
)
5456 struct frame_info
*frame
;
5457 CORE_ADDR low
, high
, selected_pc
= 0;
5458 char *extra_args
= NULL
;
5460 int extra_args_len
= 0, if_arg
= 0;
5463 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5466 if (default_breakpoint_valid
)
5468 if (deprecated_selected_frame
)
5470 selected_pc
= get_frame_pc (deprecated_selected_frame
);
5475 error ("No selected frame.");
5478 error ("No default breakpoint address now.");
5482 extra_args
= strchr (arg
, ' ');
5486 extra_args_len
= strlen (extra_args
);
5487 level_arg
= (char *) xmalloc (extra_args
- arg
);
5488 strncpy (level_arg
, arg
, extra_args
- arg
- 1);
5489 level_arg
[extra_args
- arg
- 1] = '\0';
5493 level_arg
= (char *) xmalloc (strlen (arg
) + 1);
5494 strcpy (level_arg
, arg
);
5497 frame
= parse_frame_specification (level_arg
);
5499 selected_pc
= get_frame_pc (frame
);
5506 extra_args_len
= strlen (arg
);
5511 if (find_pc_partial_function (selected_pc
, (char **) NULL
, &low
, &high
))
5515 addr_string
= xstrprintf ("*0x%s %s", paddr_nz (high
), extra_args
);
5517 addr_string
= xstrprintf ("*0x%s", paddr_nz (high
));
5518 break_command_1 (addr_string
, flag
, from_tty
, NULL
);
5519 xfree (addr_string
);
5522 error ("No function contains the specified address");
5525 error ("Unable to set breakpoint at procedure exit");
5530 break_at_finish_command_1 (char *arg
, int flag
, int from_tty
)
5532 char *addr_string
, *break_string
, *beg_addr_string
;
5533 CORE_ADDR low
, high
;
5534 struct symtabs_and_lines sals
;
5535 struct symtab_and_line sal
;
5536 struct cleanup
*old_chain
;
5537 char *extra_args
= NULL
;
5538 int extra_args_len
= 0;
5542 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5544 if (default_breakpoint_valid
)
5546 if (deprecated_selected_frame
)
5548 addr_string
= xstrprintf ("*0x%s",
5549 paddr_nz (get_frame_pc (deprecated_selected_frame
)));
5554 error ("No selected frame.");
5557 error ("No default breakpoint address now.");
5561 addr_string
= (char *) xmalloc (strlen (arg
) + 1);
5562 strcpy (addr_string
, arg
);
5568 extra_args_len
= strlen (arg
);
5572 /* get the stuff after the function name or address */
5573 extra_args
= strchr (arg
, ' ');
5577 extra_args_len
= strlen (extra_args
);
5584 beg_addr_string
= addr_string
;
5585 sals
= decode_line_1 (&addr_string
, 1, (struct symtab
*) NULL
, 0,
5586 (char ***) NULL
, NULL
);
5588 xfree (beg_addr_string
);
5589 old_chain
= make_cleanup (xfree
, sals
.sals
);
5590 for (i
= 0; (i
< sals
.nelts
); i
++)
5593 if (find_pc_partial_function (sal
.pc
, (char **) NULL
, &low
, &high
))
5597 break_string
= xstrprintf ("*0x%s %s", paddr_nz (high
),
5600 break_string
= xstrprintf ("*0x%s", paddr_nz (high
));
5601 break_command_1 (break_string
, flag
, from_tty
, NULL
);
5602 xfree (break_string
);
5605 error ("No function contains the specified address");
5609 warning ("Multiple breakpoints were set.\n");
5610 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5612 do_cleanups (old_chain
);
5616 /* Helper function for break_command_1 and disassemble_command. */
5619 resolve_sal_pc (struct symtab_and_line
*sal
)
5623 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5625 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5626 error ("No line %d in file \"%s\".",
5627 sal
->line
, sal
->symtab
->filename
);
5631 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5633 struct blockvector
*bv
;
5638 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &index
, sal
->symtab
);
5641 b
= BLOCKVECTOR_BLOCK (bv
, index
);
5642 sym
= block_function (b
);
5645 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5646 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5650 /* It really is worthwhile to have the section, so we'll just
5651 have to look harder. This case can be executed if we have
5652 line numbers but no functions (as can happen in assembly
5655 struct minimal_symbol
*msym
;
5657 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5659 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5666 break_command (char *arg
, int from_tty
)
5668 break_command_1 (arg
, 0, from_tty
, NULL
);
5672 break_at_finish_command (char *arg
, int from_tty
)
5674 break_at_finish_command_1 (arg
, 0, from_tty
);
5678 break_at_finish_at_depth_command (char *arg
, int from_tty
)
5680 break_at_finish_at_depth_command_1 (arg
, 0, from_tty
);
5684 tbreak_command (char *arg
, int from_tty
)
5686 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
, NULL
);
5690 tbreak_at_finish_command (char *arg
, int from_tty
)
5692 break_at_finish_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5696 hbreak_command (char *arg
, int from_tty
)
5698 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
, NULL
);
5702 thbreak_command (char *arg
, int from_tty
)
5704 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
, NULL
);
5708 stop_command (char *arg
, int from_tty
)
5710 printf_filtered ("Specify the type of breakpoint to set.\n\
5711 Usage: stop in <function | address>\n\
5716 stopin_command (char *arg
, int from_tty
)
5720 if (arg
== (char *) NULL
)
5722 else if (*arg
!= '*')
5727 /* look for a ':'. If this is a line number specification, then
5728 say it is bad, otherwise, it should be an address or
5729 function/method name */
5730 while (*argptr
&& !hasColon
)
5732 hasColon
= (*argptr
== ':');
5737 badInput
= (*argptr
!= ':'); /* Not a class::method */
5739 badInput
= isdigit (*arg
); /* a simple line number */
5743 printf_filtered ("Usage: stop in <function | address>\n");
5745 break_command_1 (arg
, 0, from_tty
, NULL
);
5749 stopat_command (char *arg
, int from_tty
)
5753 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5760 /* look for a ':'. If there is a '::' then get out, otherwise
5761 it is probably a line number. */
5762 while (*argptr
&& !hasColon
)
5764 hasColon
= (*argptr
== ':');
5769 badInput
= (*argptr
== ':'); /* we have class::method */
5771 badInput
= !isdigit (*arg
); /* not a line number */
5775 printf_filtered ("Usage: stop at <line>\n");
5777 break_command_1 (arg
, 0, from_tty
, NULL
);
5780 /* accessflag: hw_write: watch write,
5781 hw_read: watch read,
5782 hw_access: watch access (read or write) */
5784 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5786 struct breakpoint
*b
;
5787 struct symtab_and_line sal
;
5788 struct expression
*exp
;
5789 struct block
*exp_valid_block
;
5790 struct value
*val
, *mark
;
5791 struct frame_info
*frame
;
5792 struct frame_info
*prev_frame
= NULL
;
5793 char *exp_start
= NULL
;
5794 char *exp_end
= NULL
;
5795 char *tok
, *end_tok
;
5797 char *cond_start
= NULL
;
5798 char *cond_end
= NULL
;
5799 struct expression
*cond
= NULL
;
5800 int i
, other_type_used
, target_resources_ok
= 0;
5801 enum bptype bp_type
;
5804 init_sal (&sal
); /* initialize to zeroes */
5806 /* Parse arguments. */
5807 innermost_block
= NULL
;
5809 exp
= parse_exp_1 (&arg
, 0, 0);
5811 exp_valid_block
= innermost_block
;
5812 mark
= value_mark ();
5813 val
= evaluate_expression (exp
);
5814 release_value (val
);
5815 if (VALUE_LAZY (val
))
5816 value_fetch_lazy (val
);
5819 while (*tok
== ' ' || *tok
== '\t')
5823 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5826 toklen
= end_tok
- tok
;
5827 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5829 tok
= cond_start
= end_tok
+ 1;
5830 cond
= parse_exp_1 (&tok
, 0, 0);
5834 error ("Junk at end of command.");
5836 if (accessflag
== hw_read
)
5837 bp_type
= bp_read_watchpoint
;
5838 else if (accessflag
== hw_access
)
5839 bp_type
= bp_access_watchpoint
;
5841 bp_type
= bp_hardware_watchpoint
;
5843 mem_cnt
= can_use_hardware_watchpoint (val
);
5844 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5845 error ("Expression cannot be implemented with read/access watchpoint.");
5848 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5849 target_resources_ok
=
5850 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5852 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5853 error ("Target does not support this type of hardware watchpoint.");
5855 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5856 error ("Target can only support one kind of HW watchpoint at a time.");
5859 #if defined(HPUXHPPA)
5860 /* On HP-UX if you set a h/w
5861 watchpoint before the "run" command, the inferior dies with a e.g.,
5862 SIGILL once you start it. I initially believed this was due to a
5863 bad interaction between page protection traps and the initial
5864 startup sequence by the dynamic linker.
5866 However, I tried avoiding that by having HP-UX's implementation of
5867 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5868 yet, which forced slow watches before a "run" or "attach", and it
5869 still fails somewhere in the startup code.
5871 Until I figure out what's happening, I'm disallowing watches altogether
5872 before the "run" or "attach" command. We'll tell the user they must
5873 set watches after getting the program started. */
5874 if (!target_has_execution
)
5876 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5879 #endif /* HPUXHPPA */
5881 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5882 watchpoint could not be set. */
5883 if (!mem_cnt
|| target_resources_ok
<= 0)
5884 bp_type
= bp_watchpoint
;
5886 /* Now set up the breakpoint. */
5887 b
= set_raw_breakpoint (sal
, bp_type
);
5888 set_breakpoint_count (breakpoint_count
+ 1);
5889 b
->number
= breakpoint_count
;
5890 b
->disposition
= disp_donttouch
;
5892 b
->exp_valid_block
= exp_valid_block
;
5893 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5897 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5901 frame
= block_innermost_frame (exp_valid_block
);
5904 prev_frame
= get_prev_frame (frame
);
5905 b
->watchpoint_frame
= get_frame_id (frame
);
5909 memset (&b
->watchpoint_frame
, 0, sizeof (b
->watchpoint_frame
));
5912 /* If the expression is "local", then set up a "watchpoint scope"
5913 breakpoint at the point where we've left the scope of the watchpoint
5915 if (innermost_block
)
5919 struct breakpoint
*scope_breakpoint
;
5920 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5921 bp_watchpoint_scope
);
5923 scope_breakpoint
->enable_state
= bp_enabled
;
5925 /* Automatically delete the breakpoint when it hits. */
5926 scope_breakpoint
->disposition
= disp_del
;
5928 /* Only break in the proper frame (help with recursion). */
5929 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5931 /* Set the address at which we will stop. */
5932 scope_breakpoint
->loc
->requested_address
5933 = get_frame_pc (prev_frame
);
5934 scope_breakpoint
->loc
->address
5935 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
,
5936 scope_breakpoint
->type
);
5938 /* The scope breakpoint is related to the watchpoint. We
5939 will need to act on them together. */
5940 b
->related_breakpoint
= scope_breakpoint
;
5943 value_free_to_mark (mark
);
5947 /* Return count of locations need to be watched and can be handled
5948 in hardware. If the watchpoint can not be handled
5949 in hardware return zero. */
5951 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5952 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5953 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5957 can_use_hardware_watchpoint (struct value
*v
)
5959 int found_memory_cnt
= 0;
5960 struct value
*head
= v
;
5962 /* Did the user specifically forbid us to use hardware watchpoints? */
5963 if (!can_use_hw_watchpoints
)
5966 /* Make sure that the value of the expression depends only upon
5967 memory contents, and values computed from them within GDB. If we
5968 find any register references or function calls, we can't use a
5969 hardware watchpoint.
5971 The idea here is that evaluating an expression generates a series
5972 of values, one holding the value of every subexpression. (The
5973 expression a*b+c has five subexpressions: a, b, a*b, c, and
5974 a*b+c.) GDB's values hold almost enough information to establish
5975 the criteria given above --- they identify memory lvalues,
5976 register lvalues, computed values, etcetera. So we can evaluate
5977 the expression, and then scan the chain of values that leaves
5978 behind to decide whether we can detect any possible change to the
5979 expression's final value using only hardware watchpoints.
5981 However, I don't think that the values returned by inferior
5982 function calls are special in any way. So this function may not
5983 notice that an expression involving an inferior function call
5984 can't be watched with hardware watchpoints. FIXME. */
5985 for (; v
; v
= v
->next
)
5987 if (VALUE_LVAL (v
) == lval_memory
)
5990 /* A lazy memory lvalue is one that GDB never needed to fetch;
5991 we either just used its address (e.g., `a' in `a.b') or
5992 we never needed it at all (e.g., `a' in `a,b'). */
5996 /* Ahh, memory we actually used! Check if we can cover
5997 it with hardware watchpoints. */
5998 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
6000 /* We only watch structs and arrays if user asked for it
6001 explicitly, never if they just happen to appear in a
6002 middle of some value chain. */
6004 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
6005 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
6007 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
6008 int len
= TYPE_LENGTH (VALUE_TYPE (v
));
6010 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
6017 else if (v
->lval
!= not_lval
&& v
->modifiable
== 0)
6018 return 0; /* ??? What does this represent? */
6019 else if (v
->lval
== lval_register
)
6020 return 0; /* cannot watch a register with a HW watchpoint */
6023 /* The expression itself looks suitable for using a hardware
6024 watchpoint, but give the target machine a chance to reject it. */
6025 return found_memory_cnt
;
6029 watch_command_wrapper (char *arg
, int from_tty
)
6031 watch_command (arg
, from_tty
);
6035 watch_command (char *arg
, int from_tty
)
6037 watch_command_1 (arg
, hw_write
, from_tty
);
6041 rwatch_command_wrapper (char *arg
, int from_tty
)
6043 rwatch_command (arg
, from_tty
);
6047 rwatch_command (char *arg
, int from_tty
)
6049 watch_command_1 (arg
, hw_read
, from_tty
);
6053 awatch_command_wrapper (char *arg
, int from_tty
)
6055 awatch_command (arg
, from_tty
);
6059 awatch_command (char *arg
, int from_tty
)
6061 watch_command_1 (arg
, hw_access
, from_tty
);
6065 /* Helper routines for the until_command routine in infcmd.c. Here
6066 because it uses the mechanisms of breakpoints. */
6068 /* This function is called by fetch_inferior_event via the
6069 cmd_continuation pointer, to complete the until command. It takes
6070 care of cleaning up the temporary breakpoints set up by the until
6073 until_break_command_continuation (struct continuation_arg
*arg
)
6075 struct cleanup
*cleanups
;
6077 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
6078 do_exec_cleanups (cleanups
);
6082 until_break_command (char *arg
, int from_tty
, int anywhere
)
6084 struct symtabs_and_lines sals
;
6085 struct symtab_and_line sal
;
6086 struct frame_info
*prev_frame
= get_prev_frame (deprecated_selected_frame
);
6087 struct breakpoint
*breakpoint
;
6088 struct cleanup
*old_chain
;
6089 struct continuation_arg
*arg1
;
6092 clear_proceed_status ();
6094 /* Set a breakpoint where the user wants it and at return from
6097 if (default_breakpoint_valid
)
6098 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
6099 default_breakpoint_line
, (char ***) NULL
, NULL
);
6101 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
6102 0, (char ***) NULL
, NULL
);
6104 if (sals
.nelts
!= 1)
6105 error ("Couldn't get information on specified line.");
6108 xfree (sals
.sals
); /* malloc'd, so freed */
6111 error ("Junk at end of arguments.");
6113 resolve_sal_pc (&sal
);
6116 /* If the user told us to continue until a specified location,
6117 we don't specify a frame at which we need to stop. */
6118 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
6120 /* Otherwise, specify the current frame, because we want to stop only
6121 at the very same frame. */
6122 breakpoint
= set_momentary_breakpoint (sal
,
6123 get_frame_id (deprecated_selected_frame
),
6126 if (!target_can_async_p ())
6127 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
6129 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
6131 /* If we are running asynchronously, and the target supports async
6132 execution, we are not waiting for the target to stop, in the call
6133 tp proceed, below. This means that we cannot delete the
6134 brekpoints until the target has actually stopped. The only place
6135 where we get a chance to do that is in fetch_inferior_event, so
6136 we must set things up for that. */
6138 if (target_can_async_p ())
6140 /* In this case the arg for the continuation is just the point
6141 in the exec_cleanups chain from where to start doing
6142 cleanups, because all the continuation does is the cleanups in
6143 the exec_cleanup_chain. */
6145 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
6147 arg1
->data
.pointer
= old_chain
;
6149 add_continuation (until_break_command_continuation
, arg1
);
6152 /* Keep within the current frame, or in frames called by the current
6156 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
6157 sal
.pc
= get_frame_pc (prev_frame
);
6158 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
6160 if (!target_can_async_p ())
6161 make_cleanup_delete_breakpoint (breakpoint
);
6163 make_exec_cleanup_delete_breakpoint (breakpoint
);
6166 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
6167 /* Do the cleanups now, anly if we are not running asynchronously,
6168 of if we are, but the target is still synchronous. */
6169 if (!target_can_async_p ())
6170 do_cleanups (old_chain
);
6174 ep_skip_leading_whitespace (char **s
)
6176 if ((s
== NULL
) || (*s
== NULL
))
6178 while (isspace (**s
))
6182 /* This function examines a string, and attempts to find a token
6183 that might be an event name in the leading characters. If a
6184 possible match is found, a pointer to the last character of
6185 the token is returned. Else, NULL is returned. */
6188 ep_find_event_name_end (char *arg
)
6191 char *event_name_end
= NULL
;
6193 /* If we could depend upon the presense of strrpbrk, we'd use that... */
6197 /* We break out of the loop when we find a token delimiter.
6198 Basically, we're looking for alphanumerics and underscores;
6199 anything else delimites the token. */
6202 if (!isalnum (*s
) && (*s
!= '_'))
6208 return event_name_end
;
6212 /* This function attempts to parse an optional "if <cond>" clause
6213 from the arg string. If one is not found, it returns NULL.
6215 Else, it returns a pointer to the condition string. (It does not
6216 attempt to evaluate the string against a particular block.) And,
6217 it updates arg to point to the first character following the parsed
6218 if clause in the arg string. */
6221 ep_parse_optional_if_clause (char **arg
)
6225 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
6228 /* Skip the "if" keyword. */
6231 /* Skip any extra leading whitespace, and record the start of the
6232 condition string. */
6233 ep_skip_leading_whitespace (arg
);
6236 /* Assume that the condition occupies the remainder of the arg string. */
6237 (*arg
) += strlen (cond_string
);
6242 /* This function attempts to parse an optional filename from the arg
6243 string. If one is not found, it returns NULL.
6245 Else, it returns a pointer to the parsed filename. (This function
6246 makes no attempt to verify that a file of that name exists, or is
6247 accessible.) And, it updates arg to point to the first character
6248 following the parsed filename in the arg string.
6250 Note that clients needing to preserve the returned filename for
6251 future access should copy it to their own buffers. */
6253 ep_parse_optional_filename (char **arg
)
6255 static char filename
[1024];
6260 if ((*arg_p
== '\0') || isspace (*arg_p
))
6278 /* Commands to deal with catching events, such as signals, exceptions,
6279 process start/exit, etc. */
6283 catch_fork
, catch_vfork
6288 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
6291 char *cond_string
= NULL
;
6293 ep_skip_leading_whitespace (&arg
);
6295 /* The allowed syntax is:
6297 catch [v]fork if <cond>
6299 First, check if there's an if clause. */
6300 cond_string
= ep_parse_optional_if_clause (&arg
);
6302 if ((*arg
!= '\0') && !isspace (*arg
))
6303 error ("Junk at end of arguments.");
6305 /* If this target supports it, create a fork or vfork catchpoint
6306 and enable reporting of such events. */
6310 create_fork_event_catchpoint (tempflag
, cond_string
);
6313 create_vfork_event_catchpoint (tempflag
, cond_string
);
6316 error ("unsupported or unknown fork kind; cannot catch it");
6322 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6324 char *cond_string
= NULL
;
6326 ep_skip_leading_whitespace (&arg
);
6328 /* The allowed syntax is:
6330 catch exec if <cond>
6332 First, check if there's an if clause. */
6333 cond_string
= ep_parse_optional_if_clause (&arg
);
6335 if ((*arg
!= '\0') && !isspace (*arg
))
6336 error ("Junk at end of arguments.");
6338 /* If this target supports it, create an exec catchpoint
6339 and enable reporting of such events. */
6340 create_exec_event_catchpoint (tempflag
, cond_string
);
6344 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6346 char *dll_pathname
= NULL
;
6347 char *cond_string
= NULL
;
6349 ep_skip_leading_whitespace (&arg
);
6351 /* The allowed syntax is:
6353 catch load if <cond>
6354 catch load <filename>
6355 catch load <filename> if <cond>
6357 The user is not allowed to specify the <filename> after an
6360 We'll ignore the pathological case of a file named "if".
6362 First, check if there's an if clause. If so, then there
6363 cannot be a filename. */
6364 cond_string
= ep_parse_optional_if_clause (&arg
);
6366 /* If there was an if clause, then there cannot be a filename.
6367 Else, there might be a filename and an if clause. */
6368 if (cond_string
== NULL
)
6370 dll_pathname
= ep_parse_optional_filename (&arg
);
6371 ep_skip_leading_whitespace (&arg
);
6372 cond_string
= ep_parse_optional_if_clause (&arg
);
6375 if ((*arg
!= '\0') && !isspace (*arg
))
6376 error ("Junk at end of arguments.");
6378 /* Create a load breakpoint that only triggers when a load of
6379 the specified dll (or any dll, if no pathname was specified)
6381 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6382 dll_pathname
, cond_string
);
6386 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6388 char *dll_pathname
= NULL
;
6389 char *cond_string
= NULL
;
6391 ep_skip_leading_whitespace (&arg
);
6393 /* The allowed syntax is:
6395 catch unload if <cond>
6396 catch unload <filename>
6397 catch unload <filename> if <cond>
6399 The user is not allowed to specify the <filename> after an
6402 We'll ignore the pathological case of a file named "if".
6404 First, check if there's an if clause. If so, then there
6405 cannot be a filename. */
6406 cond_string
= ep_parse_optional_if_clause (&arg
);
6408 /* If there was an if clause, then there cannot be a filename.
6409 Else, there might be a filename and an if clause. */
6410 if (cond_string
== NULL
)
6412 dll_pathname
= ep_parse_optional_filename (&arg
);
6413 ep_skip_leading_whitespace (&arg
);
6414 cond_string
= ep_parse_optional_if_clause (&arg
);
6417 if ((*arg
!= '\0') && !isspace (*arg
))
6418 error ("Junk at end of arguments.");
6420 /* Create an unload breakpoint that only triggers when an unload of
6421 the specified dll (or any dll, if no pathname was specified)
6423 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6424 dll_pathname
, cond_string
);
6427 /* Commands to deal with catching exceptions. */
6429 /* Set a breakpoint at the specified callback routine for an
6430 exception event callback */
6433 create_exception_catchpoint (int tempflag
, char *cond_string
,
6434 enum exception_event_kind ex_event
,
6435 struct symtab_and_line
*sal
)
6437 struct breakpoint
*b
;
6438 int thread
= -1; /* All threads. */
6441 if (!sal
) /* no exception support? */
6446 case EX_EVENT_THROW
:
6447 bptype
= bp_catch_throw
;
6449 case EX_EVENT_CATCH
:
6450 bptype
= bp_catch_catch
;
6452 default: /* error condition */
6453 error ("Internal error -- invalid catchpoint kind");
6456 b
= set_raw_breakpoint (*sal
, bptype
);
6457 set_breakpoint_count (breakpoint_count
+ 1);
6458 b
->number
= breakpoint_count
;
6460 b
->cond_string
= (cond_string
== NULL
) ?
6461 NULL
: savestring (cond_string
, strlen (cond_string
));
6463 b
->addr_string
= NULL
;
6464 b
->enable_state
= bp_enabled
;
6465 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6469 static enum print_stop_action
6470 print_exception_catchpoint (struct breakpoint
*b
)
6472 annotate_catchpoint (b
->number
);
6474 if (strstr (b
->addr_string
, "throw") != NULL
)
6475 printf_filtered ("\nCatchpoint %d (exception thrown)\n",
6478 printf_filtered ("\nCatchpoint %d (exception caught)\n",
6481 return PRINT_SRC_AND_LOC
;
6485 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6490 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6493 *last_addr
= b
->loc
->address
;
6494 if (strstr (b
->addr_string
, "throw") != NULL
)
6495 ui_out_field_string (uiout
, "what", "exception throw");
6497 ui_out_field_string (uiout
, "what", "exception catch");
6501 print_mention_exception_catchpoint (struct breakpoint
*b
)
6503 if (strstr (b
->addr_string
, "throw") != NULL
)
6504 printf_filtered ("Catchpoint %d (throw)", b
->number
);
6506 printf_filtered ("Catchpoint %d (catch)", b
->number
);
6509 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6510 print_exception_catchpoint
,
6511 print_one_exception_catchpoint
,
6512 print_mention_exception_catchpoint
6516 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6517 enum exception_event_kind ex_event
, int from_tty
)
6519 char *trigger_func_name
, *nameptr
;
6520 struct symtabs_and_lines sals
;
6521 struct breakpoint
*b
;
6523 if (ex_event
== EX_EVENT_CATCH
)
6524 trigger_func_name
= xstrdup ("__cxa_begin_catch");
6526 trigger_func_name
= xstrdup ("__cxa_throw");
6528 nameptr
= trigger_func_name
;
6529 sals
= decode_line_1 (&nameptr
, 1, NULL
, 0, NULL
, NULL
);
6530 if (sals
.nelts
== 0)
6532 xfree (trigger_func_name
);
6536 b
= set_raw_breakpoint (sals
.sals
[0], bp_breakpoint
);
6537 set_breakpoint_count (breakpoint_count
+ 1);
6538 b
->number
= breakpoint_count
;
6540 b
->cond_string
= (cond_string
== NULL
) ?
6541 NULL
: savestring (cond_string
, strlen (cond_string
));
6543 b
->addr_string
= trigger_func_name
;
6544 b
->enable_state
= bp_enabled
;
6545 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6546 b
->ops
= &gnu_v3_exception_catchpoint_ops
;
6553 /* Deal with "catch catch" and "catch throw" commands */
6556 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6557 int tempflag
, int from_tty
)
6559 char *cond_string
= NULL
;
6560 struct symtab_and_line
*sal
= NULL
;
6562 ep_skip_leading_whitespace (&arg
);
6564 cond_string
= ep_parse_optional_if_clause (&arg
);
6566 if ((*arg
!= '\0') && !isspace (*arg
))
6567 error ("Junk at end of arguments.");
6569 if ((ex_event
!= EX_EVENT_THROW
) &&
6570 (ex_event
!= EX_EVENT_CATCH
))
6571 error ("Unsupported or unknown exception event; cannot catch it");
6573 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6576 /* See if we can find a callback routine */
6577 sal
= target_enable_exception_callback (ex_event
, 1);
6581 /* We have callbacks from the runtime system for exceptions.
6582 Set a breakpoint on the sal found, if no errors */
6583 if (sal
!= (struct symtab_and_line
*) -1)
6584 create_exception_catchpoint (tempflag
, cond_string
, ex_event
, sal
);
6586 return; /* something went wrong with setting up callbacks */
6589 warning ("Unsupported with this platform/compiler combination.");
6592 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6593 inside a catch_errors */
6596 cover_target_enable_exception_callback (void *arg
)
6598 args_for_catchpoint_enable
*args
= arg
;
6599 struct symtab_and_line
*sal
;
6600 sal
= target_enable_exception_callback (args
->kind
, args
->enable_p
);
6603 else if (sal
== (struct symtab_and_line
*) -1)
6606 return 1; /*is valid */
6610 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6613 /* The first argument may be an event name, such as "start" or "load".
6614 If so, then handle it as such. If it doesn't match an event name,
6615 then attempt to interpret it as an exception name. (This latter is
6616 the v4.16-and-earlier GDB meaning of the "catch" command.)
6618 First, try to find the bounds of what might be an event name. */
6619 char *arg1_start
= arg
;
6623 if (arg1_start
== NULL
)
6625 /* Old behaviour was to use pre-v-4.16 syntax */
6626 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6628 /* Now, this is not allowed */
6629 error ("Catch requires an event name.");
6632 arg1_end
= ep_find_event_name_end (arg1_start
);
6633 if (arg1_end
== NULL
)
6634 error ("catch requires an event");
6635 arg1_length
= arg1_end
+ 1 - arg1_start
;
6637 /* Try to match what we found against known event names. */
6638 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6640 error ("Catch of signal not yet implemented");
6642 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6644 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6645 tempflag
, from_tty
);
6647 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6649 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6650 tempflag
, from_tty
);
6652 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6654 error ("Catch of thread_start not yet implemented");
6656 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6658 error ("Catch of thread_exit not yet implemented");
6660 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6662 error ("Catch of thread_join not yet implemented");
6664 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6666 error ("Catch of start not yet implemented");
6668 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6670 error ("Catch of exit not yet implemented");
6672 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6674 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6676 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6678 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6680 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6682 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6684 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6686 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6688 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6690 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6692 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6694 error ("Catch of stop not yet implemented");
6697 /* This doesn't appear to be an event name */
6701 /* Pre-v.4.16 behaviour was to treat the argument
6702 as the name of an exception */
6703 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6704 /* Now this is not allowed */
6705 error ("Unknown event kind specified for catch");
6710 /* Used by the gui, could be made a worker for other things. */
6713 set_breakpoint_sal (struct symtab_and_line sal
)
6715 struct breakpoint
*b
;
6716 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6717 set_breakpoint_count (breakpoint_count
+ 1);
6718 b
->number
= breakpoint_count
;
6725 catch_command (char *arg
, int from_tty
)
6727 catch_command_1 (arg
, 0, from_tty
);
6732 tcatch_command (char *arg
, int from_tty
)
6734 catch_command_1 (arg
, 1, from_tty
);
6737 /* Delete breakpoints by address or line. */
6740 clear_command (char *arg
, int from_tty
)
6742 struct breakpoint
*b
, *tmp
, *prev
, *found
;
6744 struct symtabs_and_lines sals
;
6745 struct symtab_and_line sal
;
6750 sals
= decode_line_spec (arg
, 1);
6755 sals
.sals
= (struct symtab_and_line
*)
6756 xmalloc (sizeof (struct symtab_and_line
));
6757 make_cleanup (xfree
, sals
.sals
);
6758 init_sal (&sal
); /* initialize to zeroes */
6759 sal
.line
= default_breakpoint_line
;
6760 sal
.symtab
= default_breakpoint_symtab
;
6761 sal
.pc
= default_breakpoint_address
;
6762 if (sal
.symtab
== 0)
6763 error ("No source file specified.");
6771 /* For each line spec given, delete bps which correspond
6772 to it. Do it in two passes, solely to preserve the current
6773 behavior that from_tty is forced true if we delete more than
6777 for (i
= 0; i
< sals
.nelts
; i
++)
6779 /* If exact pc given, clear bpts at that pc.
6780 If line given (pc == 0), clear all bpts on specified line.
6781 If defaulting, clear all bpts on default line
6784 defaulting sal.pc != 0 tests to do
6789 1 0 <can't happen> */
6794 /* Find all matching breakpoints, remove them from the
6795 breakpoint chain, and add them to the 'found' chain. */
6796 ALL_BREAKPOINTS_SAFE (b
, tmp
)
6798 /* Are we going to delete b? */
6799 if (b
->type
!= bp_none
6800 && b
->type
!= bp_watchpoint
6801 && b
->type
!= bp_hardware_watchpoint
6802 && b
->type
!= bp_read_watchpoint
6803 && b
->type
!= bp_access_watchpoint
6804 /* Not if b is a watchpoint of any sort... */
6805 && (((sal
.pc
&& (b
->loc
->address
== sal
.pc
))
6806 && (!section_is_overlay (b
->loc
->section
)
6807 || b
->loc
->section
== sal
.section
))
6808 /* Yes, if sal.pc matches b (modulo overlays). */
6809 || ((default_match
|| (0 == sal
.pc
))
6810 && b
->source_file
!= NULL
6811 && sal
.symtab
!= NULL
6812 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6813 && b
->line_number
== sal
.line
)))
6814 /* Yes, if sal source file and line matches b. */
6816 /* Remove it from breakpoint_chain... */
6817 if (b
== breakpoint_chain
)
6819 /* b is at the head of the list */
6820 breakpoint_chain
= b
->next
;
6824 prev
->next
= b
->next
;
6826 /* And add it to 'found' chain. */
6832 /* Keep b, and keep a pointer to it. */
6837 /* Now go thru the 'found' chain and delete them. */
6841 error ("No breakpoint at %s.", arg
);
6843 error ("No breakpoint at this line.");
6847 from_tty
= 1; /* Always report if deleted more than one */
6849 printf_unfiltered ("Deleted breakpoint%s ", found
->next
? "s" : "");
6850 breakpoints_changed ();
6854 printf_unfiltered ("%d ", found
->number
);
6856 delete_breakpoint (found
);
6860 putchar_unfiltered ('\n');
6863 /* Delete breakpoint in BS if they are `delete' breakpoints and
6864 all breakpoints that are marked for deletion, whether hit or not.
6865 This is called after any breakpoint is hit, or after errors. */
6868 breakpoint_auto_delete (bpstat bs
)
6870 struct breakpoint
*b
, *temp
;
6872 for (; bs
; bs
= bs
->next
)
6873 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== disp_del
6875 delete_breakpoint (bs
->breakpoint_at
);
6877 ALL_BREAKPOINTS_SAFE (b
, temp
)
6879 if (b
->disposition
== disp_del_at_next_stop
)
6880 delete_breakpoint (b
);
6884 /* Delete a breakpoint and clean up all traces of it in the data
6888 delete_breakpoint (struct breakpoint
*bpt
)
6890 struct breakpoint
*b
;
6892 struct bp_location
*loc
;
6895 error ("Internal error (attempted to delete a NULL breakpoint)");
6898 /* Has this bp already been deleted? This can happen because multiple
6899 lists can hold pointers to bp's. bpstat lists are especial culprits.
6901 One example of this happening is a watchpoint's scope bp. When the
6902 scope bp triggers, we notice that the watchpoint is out of scope, and
6903 delete it. We also delete its scope bp. But the scope bp is marked
6904 "auto-deleting", and is already on a bpstat. That bpstat is then
6905 checked for auto-deleting bp's, which are deleted.
6907 A real solution to this problem might involve reference counts in bp's,
6908 and/or giving them pointers back to their referencing bpstat's, and
6909 teaching delete_breakpoint to only free a bp's storage when no more
6910 references were extent. A cheaper bandaid was chosen. */
6911 if (bpt
->type
== bp_none
)
6914 if (deprecated_delete_breakpoint_hook
)
6915 deprecated_delete_breakpoint_hook (bpt
);
6916 breakpoint_delete_event (bpt
->number
);
6918 if (bpt
->loc
->inserted
)
6919 remove_breakpoint (bpt
->loc
, mark_inserted
);
6921 free_valchain (bpt
->loc
);
6923 if (breakpoint_chain
== bpt
)
6924 breakpoint_chain
= bpt
->next
;
6926 if (bp_location_chain
== bpt
->loc
)
6927 bp_location_chain
= bpt
->loc
->next
;
6929 /* If we have callback-style exception catchpoints, don't go through
6930 the adjustments to the C++ runtime library etc. if the inferior
6931 isn't actually running. target_enable_exception_callback for a
6932 null target ops vector gives an undesirable error message, so we
6933 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6934 exceptions are supported in this way, it's OK for now. FIXME */
6935 if (ep_is_exception_catchpoint (bpt
) && target_has_execution
)
6937 /* Format possible error msg */
6938 char *message
= xstrprintf ("Error in deleting catchpoint %d:\n",
6940 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
6941 args_for_catchpoint_enable args
;
6942 args
.kind
= bpt
->type
== bp_catch_catch
?
6943 EX_EVENT_CATCH
: EX_EVENT_THROW
;
6945 catch_errors (cover_target_enable_exception_callback
, &args
,
6946 message
, RETURN_MASK_ALL
);
6947 do_cleanups (cleanups
);
6954 b
->next
= bpt
->next
;
6958 ALL_BP_LOCATIONS (loc
)
6959 if (loc
->next
== bpt
->loc
)
6961 loc
->next
= bpt
->loc
->next
;
6965 check_duplicates (bpt
);
6966 /* If this breakpoint was inserted, and there is another breakpoint
6967 at the same address, we need to insert the other breakpoint. */
6968 if (bpt
->loc
->inserted
6969 && bpt
->type
!= bp_hardware_watchpoint
6970 && bpt
->type
!= bp_read_watchpoint
6971 && bpt
->type
!= bp_access_watchpoint
6972 && bpt
->type
!= bp_catch_fork
6973 && bpt
->type
!= bp_catch_vfork
6974 && bpt
->type
!= bp_catch_exec
)
6977 if (b
->loc
->address
== bpt
->loc
->address
6978 && b
->loc
->section
== bpt
->loc
->section
6979 && !b
->loc
->duplicate
6980 && b
->enable_state
!= bp_disabled
6981 && b
->enable_state
!= bp_shlib_disabled
6983 && b
->enable_state
!= bp_call_disabled
)
6987 /* We should never reach this point if there is a permanent
6988 breakpoint at the same address as the one being deleted.
6989 If there is a permanent breakpoint somewhere, it should
6990 always be the only one inserted. */
6991 if (b
->enable_state
== bp_permanent
)
6992 internal_error (__FILE__
, __LINE__
,
6993 "another breakpoint was inserted on top of "
6994 "a permanent breakpoint");
6996 if (b
->type
== bp_hardware_breakpoint
)
6997 val
= target_insert_hw_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
6999 val
= target_insert_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
7001 /* If there was an error in the insert, print a message, then stop execution. */
7004 struct ui_file
*tmp_error_stream
= mem_fileopen ();
7005 make_cleanup_ui_file_delete (tmp_error_stream
);
7008 if (b
->type
== bp_hardware_breakpoint
)
7010 fprintf_unfiltered (tmp_error_stream
,
7011 "Cannot insert hardware breakpoint %d.\n"
7012 "You may have requested too many hardware breakpoints.\n",
7017 fprintf_unfiltered (tmp_error_stream
, "Cannot insert breakpoint %d.\n", b
->number
);
7018 fprintf_filtered (tmp_error_stream
, "Error accessing memory address ");
7019 print_address_numeric (b
->loc
->address
, 1, tmp_error_stream
);
7020 fprintf_filtered (tmp_error_stream
, ": %s.\n",
7021 safe_strerror (val
));
7024 fprintf_unfiltered (tmp_error_stream
,"The same program may be running in another process.");
7025 target_terminal_ours_for_output ();
7026 error_stream(tmp_error_stream
);
7029 b
->loc
->inserted
= 1;
7033 free_command_lines (&bpt
->commands
);
7036 if (bpt
->cond_string
!= NULL
)
7037 xfree (bpt
->cond_string
);
7038 if (bpt
->addr_string
!= NULL
)
7039 xfree (bpt
->addr_string
);
7040 if (bpt
->exp
!= NULL
)
7042 if (bpt
->exp_string
!= NULL
)
7043 xfree (bpt
->exp_string
);
7044 if (bpt
->val
!= NULL
)
7045 value_free (bpt
->val
);
7046 if (bpt
->source_file
!= NULL
)
7047 xfree (bpt
->source_file
);
7048 if (bpt
->dll_pathname
!= NULL
)
7049 xfree (bpt
->dll_pathname
);
7050 if (bpt
->triggered_dll_pathname
!= NULL
)
7051 xfree (bpt
->triggered_dll_pathname
);
7052 if (bpt
->exec_pathname
!= NULL
)
7053 xfree (bpt
->exec_pathname
);
7055 /* Be sure no bpstat's are pointing at it after it's been freed. */
7056 /* FIXME, how can we find all bpstat's?
7057 We just check stop_bpstat for now. */
7058 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
7059 if (bs
->breakpoint_at
== bpt
)
7061 bs
->breakpoint_at
= NULL
;
7063 /* bs->commands will be freed later. */
7065 /* On the chance that someone will soon try again to delete this same
7066 bp, we mark it as deleted before freeing its storage. */
7067 bpt
->type
= bp_none
;
7074 do_delete_breakpoint_cleanup (void *b
)
7076 delete_breakpoint (b
);
7080 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
7082 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
7086 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
7088 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
7092 delete_command (char *arg
, int from_tty
)
7094 struct breakpoint
*b
, *temp
;
7100 int breaks_to_delete
= 0;
7102 /* Delete all breakpoints if no argument.
7103 Do not delete internal or call-dummy breakpoints, these
7104 have to be deleted with an explicit breakpoint number argument. */
7107 if (b
->type
!= bp_call_dummy
&&
7108 b
->type
!= bp_shlib_event
&&
7109 b
->type
!= bp_thread_event
&&
7110 b
->type
!= bp_overlay_event
&&
7112 breaks_to_delete
= 1;
7115 /* Ask user only if there are some breakpoints to delete. */
7117 || (breaks_to_delete
&& query ("Delete all breakpoints? ")))
7119 ALL_BREAKPOINTS_SAFE (b
, temp
)
7121 if (b
->type
!= bp_call_dummy
&&
7122 b
->type
!= bp_shlib_event
&&
7123 b
->type
!= bp_thread_event
&&
7124 b
->type
!= bp_overlay_event
&&
7126 delete_breakpoint (b
);
7131 map_breakpoint_numbers (arg
, delete_breakpoint
);
7134 /* Reset a breakpoint given it's struct breakpoint * BINT.
7135 The value we return ends up being the return value from catch_errors.
7136 Unused in this case. */
7139 breakpoint_re_set_one (void *bint
)
7141 /* get past catch_errs */
7142 struct breakpoint
*b
= (struct breakpoint
*) bint
;
7146 int *not_found_ptr
= NULL
;
7147 struct symtabs_and_lines sals
;
7149 enum enable_state save_enable
;
7154 warning ("attempted to reset apparently deleted breakpoint #%d?",
7158 case bp_hardware_breakpoint
:
7160 case bp_catch_unload
:
7161 if (b
->addr_string
== NULL
)
7163 /* Anything without a string can't be re-set. */
7164 delete_breakpoint (b
);
7167 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
7169 ``And a hack it is, although Apple's Darwin version of GDB
7170 contains an almost identical hack to implement a "future
7171 break" command. It seems to work in many real world cases,
7172 but it is easy to come up with a test case where the patch
7173 doesn't help at all.''
7175 ``It seems that the way GDB implements breakpoints - in -
7176 shared - libraries was designed for a.out shared library
7177 systems (SunOS 4) where shared libraries were loaded at a
7178 fixed address in memory. Since ELF shared libraries can (and
7179 will) be loaded at any address in memory, things break.
7180 Fixing this is not trivial. Therefore, I'm not sure whether
7181 we should add this hack to the branch only. I cannot
7182 guarantee that things will be fixed on the trunk in the near
7185 In case we have a problem, disable this breakpoint. We'll
7186 restore its status if we succeed. Don't disable a
7187 shlib_disabled breakpoint though. There's a fair chance we
7188 can't re-set it if the shared library it's in hasn't been
7194 save_enable
= b
->enable_state
;
7195 if (b
->enable_state
!= bp_shlib_disabled
)
7196 b
->enable_state
= bp_disabled
;
7198 /* If resetting a shlib-disabled breakpoint, we don't want to
7199 see an error message if it is not found since we will expect
7200 this to occur until the shared library is finally reloaded.
7201 We accomplish this by giving decode_line_1 a pointer to use
7202 for silent notification that the symbol is not found. */
7203 not_found_ptr
= ¬_found
;
7205 set_language (b
->language
);
7206 input_radix
= b
->input_radix
;
7208 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
,
7210 for (i
= 0; i
< sals
.nelts
; i
++)
7212 resolve_sal_pc (&sals
.sals
[i
]);
7214 /* Reparse conditions, they might contain references to the
7216 if (b
->cond_string
!= NULL
)
7222 /* Avoid re-freeing b->exp if an error during the call
7226 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
7229 /* We need to re-set the breakpoint if the address changes... */
7230 if (b
->loc
->address
!= sals
.sals
[i
].pc
7231 /* ...or new and old breakpoints both have source files, and
7232 the source file name or the line number changes... */
7233 || (b
->source_file
!= NULL
7234 && sals
.sals
[i
].symtab
!= NULL
7235 && (strcmp (b
->source_file
, sals
.sals
[i
].symtab
->filename
) != 0
7236 || b
->line_number
!= sals
.sals
[i
].line
)
7238 /* ...or we switch between having a source file and not having
7240 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
7243 if (b
->source_file
!= NULL
)
7244 xfree (b
->source_file
);
7245 if (sals
.sals
[i
].symtab
== NULL
)
7246 b
->source_file
= NULL
;
7249 savestring (sals
.sals
[i
].symtab
->filename
,
7250 strlen (sals
.sals
[i
].symtab
->filename
));
7251 b
->line_number
= sals
.sals
[i
].line
;
7252 b
->loc
->requested_address
= sals
.sals
[i
].pc
;
7254 = adjust_breakpoint_address (b
->loc
->requested_address
,
7257 /* Used to check for duplicates here, but that can
7258 cause trouble, as it doesn't check for disabled
7263 /* Might be better to do this just once per breakpoint_re_set,
7264 rather than once for every breakpoint. */
7265 breakpoints_changed ();
7267 b
->loc
->section
= sals
.sals
[i
].section
;
7268 b
->enable_state
= save_enable
; /* Restore it, this worked. */
7271 /* Now that this is re-enabled, check_duplicates
7273 check_duplicates (b
);
7280 case bp_hardware_watchpoint
:
7281 case bp_read_watchpoint
:
7282 case bp_access_watchpoint
:
7283 innermost_block
= NULL
;
7284 /* The issue arises of what context to evaluate this in. The
7285 same one as when it was set, but what does that mean when
7286 symbols have been re-read? We could save the filename and
7287 functionname, but if the context is more local than that, the
7288 best we could do would be something like how many levels deep
7289 and which index at that particular level, but that's going to
7290 be less stable than filenames or function names. */
7292 /* So for now, just use a global context. */
7296 /* Avoid re-freeing b->exp if an error during the call to
7297 parse_expression. */
7300 b
->exp
= parse_expression (b
->exp_string
);
7301 b
->exp_valid_block
= innermost_block
;
7302 mark
= value_mark ();
7305 value_free (b
->val
);
7306 /* Avoid re-freeing b->val if an error during the call to
7307 evaluate_expression. */
7310 b
->val
= evaluate_expression (b
->exp
);
7311 release_value (b
->val
);
7312 if (VALUE_LAZY (b
->val
) && breakpoint_enabled (b
))
7313 value_fetch_lazy (b
->val
);
7315 if (b
->cond_string
!= NULL
)
7321 /* Avoid re-freeing b->exp if an error during the call
7325 b
->cond
= parse_exp_1 (&s
, (struct block
*) 0, 0);
7327 if (breakpoint_enabled (b
))
7329 value_free_to_mark (mark
);
7331 case bp_catch_catch
:
7332 case bp_catch_throw
:
7334 /* We needn't really do anything to reset these, since the mask
7335 that requests them is unaffected by e.g., new libraries being
7338 case bp_catch_vfork
:
7343 printf_filtered ("Deleting unknown breakpoint type %d\n", b
->type
);
7345 /* Delete longjmp and overlay event breakpoints; they will be
7346 reset later by breakpoint_re_set. */
7348 case bp_longjmp_resume
:
7349 case bp_overlay_event
:
7350 delete_breakpoint (b
);
7353 /* This breakpoint is special, it's set up when the inferior
7354 starts and we really don't want to touch it. */
7355 case bp_shlib_event
:
7357 /* Like bp_shlib_event, this breakpoint type is special.
7358 Once it is set up, we do not want to touch it. */
7359 case bp_thread_event
:
7361 /* Keep temporary breakpoints, which can be encountered when we step
7362 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7363 Otherwise these should have been blown away via the cleanup chain
7364 or by breakpoint_init_inferior when we rerun the executable. */
7367 case bp_watchpoint_scope
:
7369 case bp_step_resume
:
7376 /* Re-set all breakpoints after symbols have been re-loaded. */
7378 breakpoint_re_set (void)
7380 struct breakpoint
*b
, *temp
;
7381 enum language save_language
;
7382 int save_input_radix
;
7384 save_language
= current_language
->la_language
;
7385 save_input_radix
= input_radix
;
7386 ALL_BREAKPOINTS_SAFE (b
, temp
)
7388 /* Format possible error msg */
7389 char *message
= xstrprintf ("Error in re-setting breakpoint %d:\n",
7391 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7392 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7393 do_cleanups (cleanups
);
7395 set_language (save_language
);
7396 input_radix
= save_input_radix
;
7398 if (GET_LONGJMP_TARGET_P ())
7400 create_longjmp_breakpoint ("longjmp");
7401 create_longjmp_breakpoint ("_longjmp");
7402 create_longjmp_breakpoint ("siglongjmp");
7403 create_longjmp_breakpoint ("_siglongjmp");
7404 create_longjmp_breakpoint (NULL
);
7407 create_overlay_event_breakpoint ("_ovly_debug_event");
7410 /* Reset the thread number of this breakpoint:
7412 - If the breakpoint is for all threads, leave it as-is.
7413 - Else, reset it to the current thread for inferior_ptid. */
7415 breakpoint_re_set_thread (struct breakpoint
*b
)
7417 if (b
->thread
!= -1)
7419 if (in_thread_list (inferior_ptid
))
7420 b
->thread
= pid_to_thread_id (inferior_ptid
);
7424 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7425 If from_tty is nonzero, it prints a message to that effect,
7426 which ends with a period (no newline). */
7429 set_ignore_count (int bptnum
, int count
, int from_tty
)
7431 struct breakpoint
*b
;
7437 if (b
->number
== bptnum
)
7439 b
->ignore_count
= count
;
7443 printf_filtered ("Will stop next time breakpoint %d is reached.",
7445 else if (count
== 1)
7446 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7449 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7452 breakpoints_changed ();
7453 breakpoint_modify_event (b
->number
);
7457 error ("No breakpoint number %d.", bptnum
);
7460 /* Clear the ignore counts of all breakpoints. */
7462 breakpoint_clear_ignore_counts (void)
7464 struct breakpoint
*b
;
7467 b
->ignore_count
= 0;
7470 /* Command to set ignore-count of breakpoint N to COUNT. */
7473 ignore_command (char *args
, int from_tty
)
7479 error_no_arg ("a breakpoint number");
7481 num
= get_number (&p
);
7483 error ("bad breakpoint number: '%s'", args
);
7485 error ("Second argument (specified ignore-count) is missing.");
7487 set_ignore_count (num
,
7488 longest_to_int (value_as_long (parse_and_eval (p
))),
7491 printf_filtered ("\n");
7494 /* Call FUNCTION on each of the breakpoints
7495 whose numbers are given in ARGS. */
7498 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7503 struct breakpoint
*b
, *tmp
;
7507 error_no_arg ("one or more breakpoint numbers");
7514 num
= get_number_or_range (&p1
);
7517 warning ("bad breakpoint number at or near '%s'", p
);
7521 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7522 if (b
->number
== num
)
7524 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7527 if (related_breakpoint
)
7528 function (related_breakpoint
);
7532 printf_unfiltered ("No breakpoint number %d.\n", num
);
7538 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7539 If from_tty is nonzero, it prints a message to that effect,
7540 which ends with a period (no newline). */
7543 disable_breakpoint (struct breakpoint
*bpt
)
7545 /* Never disable a watchpoint scope breakpoint; we want to
7546 hit them when we leave scope so we can delete both the
7547 watchpoint and its scope breakpoint at that time. */
7548 if (bpt
->type
== bp_watchpoint_scope
)
7551 /* You can't disable permanent breakpoints. */
7552 if (bpt
->enable_state
== bp_permanent
)
7555 bpt
->enable_state
= bp_disabled
;
7557 check_duplicates (bpt
);
7559 if (deprecated_modify_breakpoint_hook
)
7560 deprecated_modify_breakpoint_hook (bpt
);
7561 breakpoint_modify_event (bpt
->number
);
7565 disable_command (char *args
, int from_tty
)
7567 struct breakpoint
*bpt
;
7569 ALL_BREAKPOINTS (bpt
)
7573 warning ("attempted to disable apparently deleted breakpoint #%d?",
7578 case bp_catch_unload
:
7580 case bp_catch_vfork
:
7582 case bp_catch_catch
:
7583 case bp_catch_throw
:
7584 case bp_hardware_breakpoint
:
7586 case bp_hardware_watchpoint
:
7587 case bp_read_watchpoint
:
7588 case bp_access_watchpoint
:
7589 disable_breakpoint (bpt
);
7594 map_breakpoint_numbers (args
, disable_breakpoint
);
7598 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7600 int target_resources_ok
, other_type_used
;
7603 if (bpt
->type
== bp_hardware_breakpoint
)
7606 i
= hw_breakpoint_used_count ();
7607 target_resources_ok
=
7608 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7610 if (target_resources_ok
== 0)
7611 error ("No hardware breakpoint support in the target.");
7612 else if (target_resources_ok
< 0)
7613 error ("Hardware breakpoints used exceeds limit.");
7618 if (bpt
->enable_state
!= bp_enabled
)
7620 /* When enabling a pending breakpoint, we need to check if the breakpoint
7621 is resolvable since shared libraries could have been loaded
7622 after the breakpoint was disabled. */
7623 breakpoints_changed ();
7624 if (resolve_pending_breakpoint (bpt
) == GDB_RC_OK
)
7626 delete_breakpoint (bpt
);
7629 bpt
->enable_state
= bp_enabled
;
7630 bpt
->disposition
= disposition
;
7633 else /* Not a pending breakpoint. */
7635 if (bpt
->enable_state
!= bp_permanent
)
7636 bpt
->enable_state
= bp_enabled
;
7637 bpt
->disposition
= disposition
;
7638 check_duplicates (bpt
);
7639 breakpoints_changed ();
7641 if (bpt
->type
== bp_watchpoint
||
7642 bpt
->type
== bp_hardware_watchpoint
||
7643 bpt
->type
== bp_read_watchpoint
||
7644 bpt
->type
== bp_access_watchpoint
)
7646 struct frame_id saved_frame_id
;
7648 saved_frame_id
= get_frame_id (get_selected_frame ());
7649 if (bpt
->exp_valid_block
!= NULL
)
7651 struct frame_info
*fr
=
7652 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7656 Cannot enable watchpoint %d because the block in which its expression\n\
7657 is valid is not currently in scope.\n", bpt
->number
);
7658 bpt
->enable_state
= bp_disabled
;
7664 value_free (bpt
->val
);
7665 mark
= value_mark ();
7666 bpt
->val
= evaluate_expression (bpt
->exp
);
7667 release_value (bpt
->val
);
7668 if (VALUE_LAZY (bpt
->val
))
7669 value_fetch_lazy (bpt
->val
);
7671 if (bpt
->type
== bp_hardware_watchpoint
||
7672 bpt
->type
== bp_read_watchpoint
||
7673 bpt
->type
== bp_access_watchpoint
)
7675 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7676 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7678 /* Hack around 'unused var' error for some targets here */
7680 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7681 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7682 /* we can consider of type is bp_hardware_watchpoint, convert to
7683 bp_watchpoint in the following condition */
7684 if (target_resources_ok
< 0)
7687 Cannot enable watchpoint %d because target watch resources\n\
7688 have been allocated for other watchpoints.\n", bpt
->number
);
7689 bpt
->enable_state
= bp_disabled
;
7690 value_free_to_mark (mark
);
7695 select_frame (frame_find_by_id (saved_frame_id
));
7696 value_free_to_mark (mark
);
7700 if (deprecated_modify_breakpoint_hook
)
7701 deprecated_modify_breakpoint_hook (bpt
);
7702 breakpoint_modify_event (bpt
->number
);
7706 enable_breakpoint (struct breakpoint
*bpt
)
7708 do_enable_breakpoint (bpt
, bpt
->disposition
);
7711 /* The enable command enables the specified breakpoints (or all defined
7712 breakpoints) so they once again become (or continue to be) effective
7713 in stopping the inferior. */
7716 enable_command (char *args
, int from_tty
)
7718 struct breakpoint
*bpt
;
7720 ALL_BREAKPOINTS (bpt
)
7724 warning ("attempted to enable apparently deleted breakpoint #%d?",
7729 case bp_catch_unload
:
7731 case bp_catch_vfork
:
7733 case bp_catch_catch
:
7734 case bp_catch_throw
:
7735 case bp_hardware_breakpoint
:
7737 case bp_hardware_watchpoint
:
7738 case bp_read_watchpoint
:
7739 case bp_access_watchpoint
:
7740 enable_breakpoint (bpt
);
7745 map_breakpoint_numbers (args
, enable_breakpoint
);
7749 enable_once_breakpoint (struct breakpoint
*bpt
)
7751 do_enable_breakpoint (bpt
, disp_disable
);
7755 enable_once_command (char *args
, int from_tty
)
7757 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7761 enable_delete_breakpoint (struct breakpoint
*bpt
)
7763 do_enable_breakpoint (bpt
, disp_del
);
7767 enable_delete_command (char *args
, int from_tty
)
7769 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7773 set_breakpoint_cmd (char *args
, int from_tty
)
7778 show_breakpoint_cmd (char *args
, int from_tty
)
7782 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7784 struct symtabs_and_lines
7785 decode_line_spec_1 (char *string
, int funfirstline
)
7787 struct symtabs_and_lines sals
;
7789 error ("Empty line specification.");
7790 if (default_breakpoint_valid
)
7791 sals
= decode_line_1 (&string
, funfirstline
,
7792 default_breakpoint_symtab
,
7793 default_breakpoint_line
,
7794 (char ***) NULL
, NULL
);
7796 sals
= decode_line_1 (&string
, funfirstline
,
7797 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
7799 error ("Junk at end of line specification: %s", string
);
7804 _initialize_breakpoint (void)
7806 static struct cmd_list_element
*breakpoint_set_cmdlist
;
7807 static struct cmd_list_element
*breakpoint_show_cmdlist
;
7808 struct cmd_list_element
*c
;
7811 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
7814 breakpoint_chain
= 0;
7815 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7816 before a breakpoint is set. */
7817 breakpoint_count
= 0;
7819 add_com ("ignore", class_breakpoint
, ignore_command
,
7820 "Set ignore-count of breakpoint number N to COUNT.\n\
7821 Usage is `ignore N COUNT'.");
7823 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
7825 add_com ("commands", class_breakpoint
, commands_command
,
7826 "Set commands to be executed when a breakpoint is hit.\n\
7827 Give breakpoint number as argument after \"commands\".\n\
7828 With no argument, the targeted breakpoint is the last one set.\n\
7829 The commands themselves follow starting on the next line.\n\
7830 Type a line containing \"end\" to indicate the end of them.\n\
7831 Give \"silent\" as the first line to make the breakpoint silent;\n\
7832 then no output is printed when it is hit, except what the commands print.");
7834 add_com ("condition", class_breakpoint
, condition_command
,
7835 "Specify breakpoint number N to break only if COND is true.\n\
7836 Usage is `condition N COND', where N is an integer and COND is an\n\
7837 expression to be evaluated whenever breakpoint N is reached.");
7839 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
,
7840 "Set a temporary breakpoint. Args like \"break\" command.\n\
7841 Like \"break\" except the breakpoint is only temporary,\n\
7842 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7843 by using \"enable delete\" on the breakpoint number.");
7844 set_cmd_completer (c
, location_completer
);
7846 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
,
7847 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7848 Like \"break\" except the breakpoint requires hardware support,\n\
7849 some target hardware may not have this support.");
7850 set_cmd_completer (c
, location_completer
);
7852 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
,
7853 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7854 Like \"hbreak\" except the breakpoint is only temporary,\n\
7855 so it will be deleted when hit.");
7856 set_cmd_completer (c
, location_completer
);
7858 add_prefix_cmd ("enable", class_breakpoint
, enable_command
,
7859 "Enable some breakpoints.\n\
7860 Give breakpoint numbers (separated by spaces) as arguments.\n\
7861 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7862 This is used to cancel the effect of the \"disable\" command.\n\
7863 With a subcommand you can enable temporarily.",
7864 &enablelist
, "enable ", 1, &cmdlist
);
7866 add_com ("ab", class_breakpoint
, enable_command
,
7867 "Enable some breakpoints.\n\
7868 Give breakpoint numbers (separated by spaces) as arguments.\n\
7869 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7870 This is used to cancel the effect of the \"disable\" command.\n\
7871 With a subcommand you can enable temporarily.");
7873 add_com_alias ("en", "enable", class_breakpoint
, 1);
7875 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
,
7876 "Enable some breakpoints.\n\
7877 Give breakpoint numbers (separated by spaces) as arguments.\n\
7878 This is used to cancel the effect of the \"disable\" command.\n\
7879 May be abbreviated to simply \"enable\".\n",
7880 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
7882 add_cmd ("once", no_class
, enable_once_command
,
7883 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7884 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7887 add_cmd ("delete", no_class
, enable_delete_command
,
7888 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7889 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7892 add_cmd ("delete", no_class
, enable_delete_command
,
7893 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7894 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7897 add_cmd ("once", no_class
, enable_once_command
,
7898 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7899 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7902 add_prefix_cmd ("disable", class_breakpoint
, disable_command
,
7903 "Disable some breakpoints.\n\
7904 Arguments are breakpoint numbers with spaces in between.\n\
7905 To disable all breakpoints, give no argument.\n\
7906 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7907 &disablelist
, "disable ", 1, &cmdlist
);
7908 add_com_alias ("dis", "disable", class_breakpoint
, 1);
7909 add_com_alias ("disa", "disable", class_breakpoint
, 1);
7911 add_com ("sb", class_breakpoint
, disable_command
,
7912 "Disable some breakpoints.\n\
7913 Arguments are breakpoint numbers with spaces in between.\n\
7914 To disable all breakpoints, give no argument.\n\
7915 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7917 add_cmd ("breakpoints", class_alias
, disable_command
,
7918 "Disable some breakpoints.\n\
7919 Arguments are breakpoint numbers with spaces in between.\n\
7920 To disable all breakpoints, give no argument.\n\
7921 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7922 This command may be abbreviated \"disable\".",
7925 add_prefix_cmd ("delete", class_breakpoint
, delete_command
,
7926 "Delete some breakpoints or auto-display expressions.\n\
7927 Arguments are breakpoint numbers with spaces in between.\n\
7928 To delete all breakpoints, give no argument.\n\
7930 Also a prefix command for deletion of other GDB objects.\n\
7931 The \"unset\" command is also an alias for \"delete\".",
7932 &deletelist
, "delete ", 1, &cmdlist
);
7933 add_com_alias ("d", "delete", class_breakpoint
, 1);
7935 add_com ("db", class_breakpoint
, delete_command
,
7936 "Delete some breakpoints.\n\
7937 Arguments are breakpoint numbers with spaces in between.\n\
7938 To delete all breakpoints, give no argument.\n");
7940 add_cmd ("breakpoints", class_alias
, delete_command
,
7941 "Delete some breakpoints or auto-display expressions.\n\
7942 Arguments are breakpoint numbers with spaces in between.\n\
7943 To delete all breakpoints, give no argument.\n\
7944 This command may be abbreviated \"delete\".",
7947 add_com ("clear", class_breakpoint
, clear_command
,
7948 concat ("Clear breakpoint at specified line or function.\n\
7949 Argument may be line number, function name, or \"*\" and an address.\n\
7950 If line number is specified, all breakpoints in that line are cleared.\n\
7951 If function is specified, breakpoints at beginning of function are cleared.\n\
7952 If an address is specified, breakpoints at that address are cleared.\n\n",
7953 "With no argument, clears all breakpoints in the line that the selected frame\n\
7956 See also the \"delete\" command which clears breakpoints by number.", NULL
));
7958 c
= add_com ("break", class_breakpoint
, break_command
,
7959 concat ("Set breakpoint at specified line or function.\n\
7960 Argument may be line number, function name, or \"*\" and an address.\n\
7961 If line number is specified, break at start of code for that line.\n\
7962 If function is specified, break at start of code for that function.\n\
7963 If an address is specified, break at that exact address.\n",
7964 "With no arg, uses current execution address of selected stack frame.\n\
7965 This is useful for breaking on return to a stack frame.\n\
7967 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7969 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL
));
7970 set_cmd_completer (c
, location_completer
);
7972 add_com_alias ("b", "break", class_run
, 1);
7973 add_com_alias ("br", "break", class_run
, 1);
7974 add_com_alias ("bre", "break", class_run
, 1);
7975 add_com_alias ("brea", "break", class_run
, 1);
7979 add_com_alias ("ba", "break", class_breakpoint
, 1);
7980 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
7985 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
,
7986 "Break in function/address or break at a line in the current file.",
7987 &stoplist
, "stop ", 1, &cmdlist
);
7988 add_cmd ("in", class_breakpoint
, stopin_command
,
7989 "Break in function or address.\n", &stoplist
);
7990 add_cmd ("at", class_breakpoint
, stopat_command
,
7991 "Break at a line in the current file.\n", &stoplist
);
7992 add_com ("status", class_info
, breakpoints_info
,
7993 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7994 The \"Type\" column indicates one of:\n\
7995 \tbreakpoint - normal breakpoint\n\
7996 \twatchpoint - watchpoint\n\
7997 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7998 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7999 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8000 address and file/line number respectively.\n\n",
8001 "Convenience variable \"$_\" and default examine address for \"x\"\n\
8002 are set to the address of the last breakpoint listed.\n\n\
8003 Convenience variable \"$bpnum\" contains the number of the last\n\
8004 breakpoint set.", NULL
));
8007 add_info ("breakpoints", breakpoints_info
,
8008 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8009 The \"Type\" column indicates one of:\n\
8010 \tbreakpoint - normal breakpoint\n\
8011 \twatchpoint - watchpoint\n\
8012 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8013 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8014 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8015 address and file/line number respectively.\n\n",
8016 "Convenience variable \"$_\" and default examine address for \"x\"\n\
8017 are set to the address of the last breakpoint listed.\n\n\
8018 Convenience variable \"$bpnum\" contains the number of the last\n\
8019 breakpoint set.", NULL
));
8022 add_com ("lb", class_breakpoint
, breakpoints_info
,
8023 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
8024 The \"Type\" column indicates one of:\n\
8025 \tbreakpoint - normal breakpoint\n\
8026 \twatchpoint - watchpoint\n\
8027 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8028 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8029 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8030 address and file/line number respectively.\n\n",
8031 "Convenience variable \"$_\" and default examine address for \"x\"\n\
8032 are set to the address of the last breakpoint listed.\n\n\
8033 Convenience variable \"$bpnum\" contains the number of the last\n\
8034 breakpoint set.", NULL
));
8036 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
,
8037 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
8038 The \"Type\" column indicates one of:\n\
8039 \tbreakpoint - normal breakpoint\n\
8040 \twatchpoint - watchpoint\n\
8041 \tlongjmp - internal breakpoint used to step through longjmp()\n\
8042 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
8043 \tuntil - internal breakpoint used by the \"until\" command\n\
8044 \tfinish - internal breakpoint used by the \"finish\" command\n",
8045 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
8046 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
8047 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
8048 address and file/line number respectively.\n\n",
8049 "Convenience variable \"$_\" and default examine address for \"x\"\n\
8050 are set to the address of the last breakpoint listed.\n\n\
8051 Convenience variable \"$bpnum\" contains the number of the last\n\
8052 breakpoint set.", NULL
),
8053 &maintenanceinfolist
);
8055 add_com ("catch", class_breakpoint
, catch_command
,
8056 "Set catchpoints to catch events.\n\
8057 Raised signals may be caught:\n\
8058 \tcatch signal - all signals\n\
8059 \tcatch signal <signame> - a particular signal\n\
8060 Raised exceptions may be caught:\n\
8061 \tcatch throw - all exceptions, when thrown\n\
8062 \tcatch throw <exceptname> - a particular exception, when thrown\n\
8063 \tcatch catch - all exceptions, when caught\n\
8064 \tcatch catch <exceptname> - a particular exception, when caught\n\
8065 Thread or process events may be caught:\n\
8066 \tcatch thread_start - any threads, just after creation\n\
8067 \tcatch thread_exit - any threads, just before expiration\n\
8068 \tcatch thread_join - any threads, just after joins\n\
8069 Process events may be caught:\n\
8070 \tcatch start - any processes, just after creation\n\
8071 \tcatch exit - any processes, just before expiration\n\
8072 \tcatch fork - calls to fork()\n\
8073 \tcatch vfork - calls to vfork()\n\
8074 \tcatch exec - calls to exec()\n\
8075 Dynamically-linked library events may be caught:\n\
8076 \tcatch load - loads of any library\n\
8077 \tcatch load <libname> - loads of a particular library\n\
8078 \tcatch unload - unloads of any library\n\
8079 \tcatch unload <libname> - unloads of a particular library\n\
8080 The act of your program's execution stopping may also be caught:\n\
8082 C++ exceptions may be caught:\n\
8083 \tcatch throw - all exceptions, when thrown\n\
8084 \tcatch catch - all exceptions, when caught\n\
8086 Do \"help set follow-fork-mode\" for info on debugging your program\n\
8087 after a fork or vfork is caught.\n\n\
8088 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
8090 add_com ("tcatch", class_breakpoint
, tcatch_command
,
8091 "Set temporary catchpoints to catch events.\n\
8092 Args like \"catch\" command.\n\
8093 Like \"catch\" except the catchpoint is only temporary,\n\
8094 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
8095 by using \"enable delete\" on the catchpoint number.");
8097 c
= add_com ("watch", class_breakpoint
, watch_command
,
8098 "Set a watchpoint for an expression.\n\
8099 A watchpoint stops execution of your program whenever the value of\n\
8100 an expression changes.");
8101 set_cmd_completer (c
, location_completer
);
8103 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
,
8104 "Set a read watchpoint for an expression.\n\
8105 A watchpoint stops execution of your program whenever the value of\n\
8106 an expression is read.");
8107 set_cmd_completer (c
, location_completer
);
8109 c
= add_com ("awatch", class_breakpoint
, awatch_command
,
8110 "Set a watchpoint for an expression.\n\
8111 A watchpoint stops execution of your program whenever the value of\n\
8112 an expression is either read or written.");
8113 set_cmd_completer (c
, location_completer
);
8115 add_info ("watchpoints", breakpoints_info
,
8116 "Synonym for ``info breakpoints''.");
8119 c
= add_set_cmd ("can-use-hw-watchpoints", class_support
, var_zinteger
,
8120 (char *) &can_use_hw_watchpoints
,
8121 "Set debugger's willingness to use watchpoint hardware.\n\
8122 If zero, gdb will not use hardware for new watchpoints, even if\n\
8123 such is available. (However, any hardware watchpoints that were\n\
8124 created before setting this to nonzero, will continue to use watchpoint\n\
8127 deprecated_add_show_from_set (c
, &showlist
);
8129 can_use_hw_watchpoints
= 1;
8131 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, "\
8132 Breakpoint specific settings\n\
8133 Configure various breakpoint-specific variables such as\n\
8134 pending breakpoint behavior",
8135 &breakpoint_set_cmdlist
, "set breakpoint ",
8136 0/*allow-unknown*/, &setlist
);
8137 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, "\
8138 Breakpoint specific settings\n\
8139 Configure various breakpoint-specific variables such as\n\
8140 pending breakpoint behavior",
8141 &breakpoint_show_cmdlist
, "show breakpoint ",
8142 0/*allow-unknown*/, &showlist
);
8144 add_setshow_auto_boolean_cmd ("pending", no_class
, &pending_break_support
, "\
8145 Set debugger's behavior regarding pending breakpoints.", "\
8146 Show debugger's behavior regarding pending breakpoints.", "\
8147 If on, an unrecognized breakpoint location will cause gdb to create a\n\
8148 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
8149 an error. If auto, an unrecognized breakpoint location results in a\n\
8150 user-query to see if a pending breakpoint should be created.", "\
8151 Debugger's behavior regarding pending breakpoints is %s.",
8153 &breakpoint_set_cmdlist
,
8154 &breakpoint_show_cmdlist
);
8156 pending_break_support
= AUTO_BOOLEAN_AUTO
;