1 /* Everything about breakpoints, for GDB.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
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., 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, 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 "exceptions.h"
57 #include "gdb-events.h"
58 #include "mi/mi-common.h"
60 /* Prototypes for local functions. */
62 static void until_break_command_continuation (struct continuation_arg
*arg
);
64 static void catch_command_1 (char *, int, int);
66 static void enable_delete_command (char *, int);
68 static void enable_delete_breakpoint (struct breakpoint
*);
70 static void enable_once_command (char *, int);
72 static void enable_once_breakpoint (struct breakpoint
*);
74 static void disable_command (char *, int);
76 static void enable_command (char *, int);
78 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
80 static void ignore_command (char *, int);
82 static int breakpoint_re_set_one (void *);
84 static void clear_command (char *, int);
86 static void catch_command (char *, int);
88 static void watch_command (char *, int);
90 static int can_use_hardware_watchpoint (struct value
*);
92 static int break_command_1 (char *, int, int, struct breakpoint
*);
94 static void mention (struct breakpoint
*);
96 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
98 static void check_duplicates (struct breakpoint
*);
100 static void breakpoint_adjustment_warning (CORE_ADDR
, CORE_ADDR
, int, int);
102 static CORE_ADDR
adjust_breakpoint_address (CORE_ADDR bpaddr
,
105 static void describe_other_breakpoints (CORE_ADDR
, asection
*);
107 static void breakpoints_info (char *, int);
109 static void breakpoint_1 (int, int);
111 static bpstat
bpstat_alloc (struct breakpoint
*, bpstat
);
113 static int breakpoint_cond_eval (void *);
115 static void cleanup_executing_breakpoints (void *);
117 static void commands_command (char *, int);
119 static void condition_command (char *, int);
121 static int get_number_trailer (char **, int);
123 void set_breakpoint_count (int);
132 static int remove_breakpoint (struct bp_location
*, insertion_state_t
);
134 static enum print_stop_action
print_it_typical (bpstat
);
136 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
140 enum exception_event_kind kind
;
143 args_for_catchpoint_enable
;
145 static int watchpoint_check (void *);
147 static int cover_target_enable_exception_callback (void *);
149 static void maintenance_info_breakpoints (char *, int);
151 static void create_longjmp_breakpoint (char *);
153 static void create_overlay_event_breakpoint (char *);
155 static int hw_breakpoint_used_count (void);
157 static int hw_watchpoint_used_count (enum bptype
, int *);
159 static void hbreak_command (char *, int);
161 static void thbreak_command (char *, int);
163 static void watch_command_1 (char *, int, int);
165 static void rwatch_command (char *, int);
167 static void awatch_command (char *, int);
169 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
171 static void solib_load_unload_1 (char *hookname
,
174 char *cond_string
, enum bptype bp_kind
);
176 static void create_fork_vfork_event_catchpoint (int tempflag
,
178 enum bptype bp_kind
);
180 static void stop_command (char *arg
, int from_tty
);
182 static void stopin_command (char *arg
, int from_tty
);
184 static void stopat_command (char *arg
, int from_tty
);
186 static char *ep_find_event_name_end (char *arg
);
188 static char *ep_parse_optional_if_clause (char **arg
);
190 static char *ep_parse_optional_filename (char **arg
);
192 static void create_exception_catchpoint (int tempflag
, char *cond_string
,
193 enum exception_event_kind ex_event
,
194 struct symtab_and_line
*sal
);
196 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
197 char *arg
, int tempflag
, int from_tty
);
199 static void tcatch_command (char *arg
, int from_tty
);
201 static void ep_skip_leading_whitespace (char **s
);
203 /* Prototypes for exported functions. */
205 /* If FALSE, gdb will not use hardware support for watchpoints, even
206 if such is available. */
207 static int can_use_hw_watchpoints
;
210 show_can_use_hw_watchpoints (struct ui_file
*file
, int from_tty
,
211 struct cmd_list_element
*c
,
214 fprintf_filtered (file
, _("\
215 Debugger's willingness to use watchpoint hardware is %s.\n"),
219 /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints.
220 If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints
221 for unrecognized breakpoint locations.
222 If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */
223 static enum auto_boolean pending_break_support
;
225 show_pending_break_support (struct ui_file
*file
, int from_tty
,
226 struct cmd_list_element
*c
,
229 fprintf_filtered (file
, _("\
230 Debugger's behavior regarding pending breakpoints is %s.\n"),
234 void _initialize_breakpoint (void);
236 extern int addressprint
; /* Print machine addresses? */
238 /* Are we executing breakpoint commands? */
239 static int executing_breakpoint_commands
;
241 /* Are overlay event breakpoints enabled? */
242 static int overlay_events_enabled
;
244 /* Walk the following statement or block through all breakpoints.
245 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
248 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
250 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
251 for (B = breakpoint_chain; \
252 B ? (TMP=B->next, 1): 0; \
255 /* Similar iterators for the low-level breakpoints. */
257 #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->next)
259 #define ALL_BP_LOCATIONS_SAFE(B,TMP) \
260 for (B = bp_location_chain; \
261 B ? (TMP=B->next, 1): 0; \
264 /* True if breakpoint hit counts should be displayed in breakpoint info. */
266 int show_breakpoint_hit_counts
= 1;
268 /* Chains of all breakpoints defined. */
270 struct breakpoint
*breakpoint_chain
;
272 struct bp_location
*bp_location_chain
;
274 /* Number of last breakpoint made. */
276 int breakpoint_count
;
278 /* Pointer to current exception event record */
279 static struct exception_event_record
*current_exception_event
;
281 /* Indicator of whether exception catchpoints should be nuked between
282 runs of a program. */
283 int deprecated_exception_catchpoints_are_fragile
= 0;
285 /* Indicator of when exception catchpoints set-up should be
286 reinitialized -- e.g. when program is re-run. */
287 int deprecated_exception_support_initialized
= 0;
289 /* This function returns a pointer to the string representation of the
290 pathname of the dynamically-linked library that has just been
293 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
294 or undefined results are guaranteed.
296 This string's contents are only valid immediately after the
297 inferior has stopped in the dynamic linker hook, and becomes
298 invalid as soon as the inferior is continued. Clients should make
299 a copy of this string if they wish to continue the inferior and
300 then access the string. */
302 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
303 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
306 /* This function returns a pointer to the string representation of the
307 pathname of the dynamically-linked library that has just been
310 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
311 TRUE, or undefined results are guaranteed.
313 This string's contents are only valid immediately after the
314 inferior has stopped in the dynamic linker hook, and becomes
315 invalid as soon as the inferior is continued. Clients should make
316 a copy of this string if they wish to continue the inferior and
317 then access the string. */
319 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
320 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
323 /* This function is called by the "catch load" command. It allows the
324 debugger to be notified by the dynamic linker when a specified
325 library file (or any library file, if filename is NULL) is loaded. */
327 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
328 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
329 error (_("catch of library loads not yet implemented on this platform"))
332 /* This function is called by the "catch unload" command. It allows
333 the debugger to be notified by the dynamic linker when a specified
334 library file (or any library file, if filename is NULL) is
337 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
338 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid, tempflag, filename, cond_string) \
339 error (_("catch of library unloads not yet implemented on this platform"))
342 /* Return whether a breakpoint is an active enabled breakpoint. */
344 breakpoint_enabled (struct breakpoint
*b
)
346 return (b
->enable_state
== bp_enabled
&& !b
->pending
);
349 /* Set breakpoint count to NUM. */
352 set_breakpoint_count (int num
)
354 breakpoint_count
= num
;
355 set_internalvar (lookup_internalvar ("bpnum"),
356 value_from_longest (builtin_type_int
, (LONGEST
) num
));
359 /* Used in run_command to zero the hit count when a new run starts. */
362 clear_breakpoint_hit_counts (void)
364 struct breakpoint
*b
;
370 /* Default address, symtab and line to put a breakpoint at
371 for "break" command with no arg.
372 if default_breakpoint_valid is zero, the other three are
373 not valid, and "break" with no arg is an error.
375 This set by print_stack_frame, which calls set_default_breakpoint. */
377 int default_breakpoint_valid
;
378 CORE_ADDR default_breakpoint_address
;
379 struct symtab
*default_breakpoint_symtab
;
380 int default_breakpoint_line
;
382 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
383 Advance *PP after the string and any trailing whitespace.
385 Currently the string can either be a number or "$" followed by the name
386 of a convenience variable. Making it an expression wouldn't work well
387 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
389 TRAILER is a character which can be found after the number; most
390 commonly this is `-'. If you don't want a trailer, use \0. */
392 get_number_trailer (char **pp
, int trailer
)
394 int retval
= 0; /* default */
398 /* Empty line means refer to the last breakpoint. */
399 return breakpoint_count
;
402 /* Make a copy of the name, so we can null-terminate it
403 to pass to lookup_internalvar(). */
408 while (isalnum (*p
) || *p
== '_')
410 varname
= (char *) alloca (p
- start
+ 1);
411 strncpy (varname
, start
, p
- start
);
412 varname
[p
- start
] = '\0';
413 val
= value_of_internalvar (lookup_internalvar (varname
));
414 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_INT
)
415 retval
= (int) value_as_long (val
);
418 printf_filtered (_("Convenience variable must have integer value.\n"));
426 while (*p
>= '0' && *p
<= '9')
429 /* There is no number here. (e.g. "cond a == b"). */
431 /* Skip non-numeric token */
432 while (*p
&& !isspace((int) *p
))
434 /* Return zero, which caller must interpret as error. */
440 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
442 /* Trailing junk: return 0 and let caller print error msg. */
443 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
454 /* Like get_number_trailer, but don't allow a trailer. */
456 get_number (char **pp
)
458 return get_number_trailer (pp
, '\0');
461 /* Parse a number or a range.
462 * A number will be of the form handled by get_number.
463 * A range will be of the form <number1> - <number2>, and
464 * will represent all the integers between number1 and number2,
467 * While processing a range, this fuction is called iteratively;
468 * At each call it will return the next value in the range.
470 * At the beginning of parsing a range, the char pointer PP will
471 * be advanced past <number1> and left pointing at the '-' token.
472 * Subsequent calls will not advance the pointer until the range
473 * is completed. The call that completes the range will advance
474 * pointer PP past <number2>.
478 get_number_or_range (char **pp
)
480 static int last_retval
, end_value
;
481 static char *end_ptr
;
482 static int in_range
= 0;
486 /* Default case: pp is pointing either to a solo number,
487 or to the first number of a range. */
488 last_retval
= get_number_trailer (pp
, '-');
493 /* This is the start of a range (<number1> - <number2>).
494 Skip the '-', parse and remember the second number,
495 and also remember the end of the final token. */
499 while (isspace ((int) *end_ptr
))
500 end_ptr
++; /* skip white space */
501 end_value
= get_number (temp
);
502 if (end_value
< last_retval
)
504 error (_("inverted range"));
506 else if (end_value
== last_retval
)
508 /* degenerate range (number1 == number2). Advance the
509 token pointer so that the range will be treated as a
518 error (_("negative value"));
521 /* pp points to the '-' that betokens a range. All
522 number-parsing has already been done. Return the next
523 integer value (one greater than the saved previous value).
524 Do not advance the token pointer 'pp' until the end of range
527 if (++last_retval
== end_value
)
529 /* End of range reached; advance token pointer. */
539 /* condition N EXP -- set break condition of breakpoint N to EXP. */
542 condition_command (char *arg
, int from_tty
)
544 struct breakpoint
*b
;
549 error_no_arg (_("breakpoint number"));
552 bnum
= get_number (&p
);
554 error (_("Bad breakpoint argument: '%s'"), arg
);
557 if (b
->number
== bnum
)
564 if (b
->cond_string
!= NULL
)
565 xfree (b
->cond_string
);
570 b
->cond_string
= NULL
;
572 printf_filtered (_("Breakpoint %d now unconditional.\n"), bnum
);
577 /* I don't know if it matters whether this is the string the user
578 typed in or the decompiled expression. */
579 b
->cond_string
= savestring (arg
, strlen (arg
));
582 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->loc
->address
), 0);
584 error (_("Junk at end of expression"));
587 breakpoints_changed ();
588 breakpoint_modify_event (b
->number
);
592 error (_("No breakpoint number %d."), bnum
);
596 commands_command (char *arg
, int from_tty
)
598 struct breakpoint
*b
;
601 struct command_line
*l
;
603 /* If we allowed this, we would have problems with when to
604 free the storage, if we change the commands currently
607 if (executing_breakpoint_commands
)
608 error (_("Can't use the \"commands\" command among a breakpoint's commands."));
611 bnum
= get_number (&p
);
614 error (_("Unexpected extra arguments following breakpoint number."));
617 if (b
->number
== bnum
)
619 char *tmpbuf
= xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
621 struct cleanup
*cleanups
= make_cleanup (xfree
, tmpbuf
);
622 l
= read_command_lines (tmpbuf
, from_tty
);
623 do_cleanups (cleanups
);
624 free_command_lines (&b
->commands
);
626 breakpoints_changed ();
627 breakpoint_modify_event (b
->number
);
630 error (_("No breakpoint number %d."), bnum
);
633 /* Like target_read_memory() but if breakpoints are inserted, return
634 the shadow contents instead of the breakpoints themselves.
636 Read "memory data" from whatever target or inferior we have.
637 Returns zero if successful, errno value if not. EIO is used
638 for address out of bounds. If breakpoints are inserted, returns
639 shadow contents, not the breakpoints themselves. From breakpoint.c. */
642 deprecated_read_memory_nobpt (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
646 struct bp_location
*b
;
647 CORE_ADDR bp_addr
= 0;
650 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
651 /* No breakpoints on this machine. */
652 return target_read_memory (memaddr
, myaddr
, len
);
656 if (b
->owner
->type
== bp_none
)
657 warning (_("reading through apparently deleted breakpoint #%d?"),
660 if (b
->loc_type
!= bp_loc_software_breakpoint
)
664 /* Addresses and length of the part of the breakpoint that
666 /* XXXX The m68k, sh and h8300 have different local and remote
667 breakpoint values. BREAKPOINT_FROM_PC still manages to
668 correctly determine the breakpoints memory address and size
669 for these targets. */
670 bp_addr
= b
->address
;
672 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
677 if (bp_addr
+ bp_size
<= memaddr
)
678 /* The breakpoint is entirely before the chunk of memory we
681 if (bp_addr
>= memaddr
+ len
)
682 /* The breakpoint is entirely after the chunk of memory we are
685 /* Copy the breakpoint from the shadow contents, and recurse for
686 the things before and after. */
688 /* Offset within shadow_contents. */
691 if (bp_addr
< memaddr
)
693 /* Only copy the second part of the breakpoint. */
694 bp_size
-= memaddr
- bp_addr
;
695 bptoffset
= memaddr
- bp_addr
;
699 if (bp_addr
+ bp_size
> memaddr
+ len
)
701 /* Only copy the first part of the breakpoint. */
702 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
705 memcpy (myaddr
+ bp_addr
- memaddr
,
706 b
->shadow_contents
+ bptoffset
, bp_size
);
708 if (bp_addr
> memaddr
)
710 /* Copy the section of memory before the breakpoint. */
711 status
= deprecated_read_memory_nobpt (memaddr
, myaddr
, bp_addr
- memaddr
);
716 if (bp_addr
+ bp_size
< memaddr
+ len
)
718 /* Copy the section of memory after the breakpoint. */
719 status
= deprecated_read_memory_nobpt (bp_addr
+ bp_size
,
720 myaddr
+ bp_addr
+ bp_size
- memaddr
,
721 memaddr
+ len
- (bp_addr
+ bp_size
));
728 /* Nothing overlaps. Just call read_memory_noerr. */
729 return target_read_memory (memaddr
, myaddr
, len
);
733 /* A wrapper function for inserting catchpoints. */
735 insert_catchpoint (struct ui_out
*uo
, void *args
)
737 struct breakpoint
*b
= (struct breakpoint
*) args
;
743 target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
746 target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
749 target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
752 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
757 /* Helper routine: free the value chain for a breakpoint (watchpoint). */
759 static void free_valchain (struct bp_location
*b
)
764 /* Free the saved value chain. We will construct a new one
765 the next time the watchpoint is inserted. */
766 for (v
= b
->owner
->val_chain
; v
; v
= n
)
771 b
->owner
->val_chain
= NULL
;
774 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
775 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
776 PROCESS_WARNING, and HW_BREAKPOINT_ERROR are used to report problems.
778 NOTE drow/2003-09-09: This routine could be broken down to an object-style
779 method for each breakpoint or catchpoint type. */
781 insert_bp_location (struct bp_location
*bpt
,
782 struct ui_file
*tmp_error_stream
,
783 int *disabled_breaks
, int *process_warning
,
784 int *hw_breakpoint_error
)
788 /* Permanent breakpoints cannot be inserted or removed. Disabled
789 breakpoints should not be inserted. */
790 if (!breakpoint_enabled (bpt
->owner
))
793 if (bpt
->inserted
|| bpt
->duplicate
)
796 if (bpt
->loc_type
== bp_loc_software_breakpoint
797 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
799 /* First check to see if we have to handle an overlay. */
800 if (overlay_debugging
== ovly_off
801 || bpt
->section
== NULL
802 || !(section_is_overlay (bpt
->section
)))
804 /* No overlay handling: just set the breakpoint. */
806 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
807 val
= target_insert_hw_breakpoint (bpt
->address
,
808 bpt
->shadow_contents
);
810 val
= target_insert_breakpoint (bpt
->address
,
811 bpt
->shadow_contents
);
815 /* This breakpoint is in an overlay section.
816 Shall we set a breakpoint at the LMA? */
817 if (!overlay_events_enabled
)
819 /* Yes -- overlay event support is not active,
820 so we must try to set a breakpoint at the LMA.
821 This will not work for a hardware breakpoint. */
822 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
823 warning (_("hardware breakpoint %d not supported in overlay!"),
827 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
829 /* Set a software (trap) breakpoint at the LMA. */
830 val
= target_insert_breakpoint (addr
, bpt
->shadow_contents
);
832 fprintf_unfiltered (tmp_error_stream
,
833 "Overlay breakpoint %d failed: in ROM?",
837 /* Shall we set a breakpoint at the VMA? */
838 if (section_is_mapped (bpt
->section
))
840 /* Yes. This overlay section is mapped into memory. */
841 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
842 val
= target_insert_hw_breakpoint (bpt
->address
,
843 bpt
->shadow_contents
);
845 val
= target_insert_breakpoint (bpt
->address
,
846 bpt
->shadow_contents
);
850 /* No. This breakpoint will not be inserted.
851 No error, but do not mark the bp as 'inserted'. */
858 /* Can't set the breakpoint. */
860 #if defined (DISABLE_UNSETTABLE_BREAK)
861 DISABLE_UNSETTABLE_BREAK (bpt
->address
)
863 solib_address (bpt
->address
)
867 /* See also: disable_breakpoints_in_shlibs. */
869 bpt
->owner
->enable_state
= bp_shlib_disabled
;
870 if (!*disabled_breaks
)
872 fprintf_unfiltered (tmp_error_stream
,
873 "Cannot insert breakpoint %d.\n",
875 fprintf_unfiltered (tmp_error_stream
,
876 "Temporarily disabling shared library breakpoints:\n");
878 *disabled_breaks
= 1;
879 fprintf_unfiltered (tmp_error_stream
,
880 "breakpoint #%d\n", bpt
->owner
->number
);
884 #ifdef ONE_PROCESS_WRITETEXT
885 *process_warning
= 1;
887 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
889 *hw_breakpoint_error
= 1;
890 fprintf_unfiltered (tmp_error_stream
,
891 "Cannot insert hardware breakpoint %d.\n",
896 fprintf_unfiltered (tmp_error_stream
,
897 "Cannot insert breakpoint %d.\n",
899 fprintf_filtered (tmp_error_stream
,
900 "Error accessing memory address ");
901 deprecated_print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
902 fprintf_filtered (tmp_error_stream
, ": %s.\n",
903 safe_strerror (val
));
914 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
915 /* NOTE drow/2003-09-08: This state only exists for removing
916 watchpoints. It's not clear that it's necessary... */
917 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
919 /* FIXME drow/2003-09-08: This code sets multiple hardware watchpoints
920 based on the expression. Ideally this should happen at a higher level,
921 and there should be one bp_location for each computed address we
922 must watch. As soon as a many-to-one mapping is available I'll
925 int within_current_scope
;
926 struct value
*mark
= value_mark ();
928 struct frame_id saved_frame_id
;
930 /* Save the current frame's ID so we can restore it after
931 evaluating the watchpoint expression on its own frame. */
932 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
933 took a frame parameter, so that we didn't have to change the
935 saved_frame_id
= get_frame_id (deprecated_selected_frame
);
937 /* Determine if the watchpoint is within scope. */
938 if (bpt
->owner
->exp_valid_block
== NULL
)
939 within_current_scope
= 1;
942 struct frame_info
*fi
;
943 fi
= frame_find_by_id (bpt
->owner
->watchpoint_frame
);
944 within_current_scope
= (fi
!= NULL
);
945 if (within_current_scope
)
949 if (within_current_scope
)
953 /* Evaluate the expression and cut the chain of values
954 produced off from the value chain.
956 Make sure the value returned isn't lazy; we use
957 laziness to determine what memory GDB actually needed
958 in order to compute the value of the expression. */
959 v
= evaluate_expression (bpt
->owner
->exp
);
961 value_release_to_mark (mark
);
963 bpt
->owner
->val_chain
= v
;
966 /* Look at each value on the value chain. */
967 for (; v
; v
= value_next (v
))
969 /* If it's a memory location, and GDB actually needed
970 its contents to evaluate the expression, then we
972 if (VALUE_LVAL (v
) == lval_memory
975 struct type
*vtype
= check_typedef (value_type (v
));
977 /* We only watch structs and arrays if user asked
978 for it explicitly, never if they just happen to
979 appear in the middle of some value chain. */
980 if (v
== bpt
->owner
->val_chain
981 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
982 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
987 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
988 len
= TYPE_LENGTH (value_type (v
));
990 if (bpt
->owner
->type
== bp_read_watchpoint
)
992 else if (bpt
->owner
->type
== bp_access_watchpoint
)
995 val
= target_insert_watchpoint (addr
, len
, type
);
998 /* Don't exit the loop, try to insert
999 every value on the value chain. That's
1000 because we will be removing all the
1001 watches below, and removing a
1002 watchpoint we didn't insert could have
1010 /* Failure to insert a watchpoint on any memory value in the
1011 value chain brings us here. */
1014 remove_breakpoint (bpt
, mark_uninserted
);
1015 *hw_breakpoint_error
= 1;
1016 fprintf_unfiltered (tmp_error_stream
,
1017 "Could not insert hardware watchpoint %d.\n",
1018 bpt
->owner
->number
);
1024 printf_filtered (_("\
1025 Hardware watchpoint %d deleted because the program has left the block \n\
1026 in which its expression is valid.\n"),
1027 bpt
->owner
->number
);
1028 if (bpt
->owner
->related_breakpoint
)
1029 bpt
->owner
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1030 bpt
->owner
->disposition
= disp_del_at_next_stop
;
1033 /* Restore the selected frame. */
1034 select_frame (frame_find_by_id (saved_frame_id
));
1039 else if (ep_is_exception_catchpoint (bpt
->owner
))
1041 /* FIXME drow/2003-09-09: This code sets both a catchpoint and a
1042 breakpoint. Once again, it would be better if this was represented
1043 as two bp_locations. */
1045 /* If we get here, we must have a callback mechanism for exception
1046 events -- with g++ style embedded label support, we insert
1047 ordinary breakpoints and not catchpoints. */
1048 val
= target_insert_breakpoint (bpt
->address
, bpt
->shadow_contents
);
1051 /* Couldn't set breakpoint for some reason */
1052 fprintf_unfiltered (tmp_error_stream
,
1053 "Cannot insert catchpoint %d; disabling it.\n",
1054 bpt
->owner
->number
);
1055 fprintf_filtered (tmp_error_stream
,
1056 "Error accessing memory address ");
1057 deprecated_print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
1058 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1059 safe_strerror (val
));
1060 bpt
->owner
->enable_state
= bp_disabled
;
1064 /* Bp set, now make sure callbacks are enabled */
1065 /* Format possible error msg */
1066 char *message
= xstrprintf ("Error inserting catchpoint %d:\n",
1067 bpt
->owner
->number
);
1068 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
1070 args_for_catchpoint_enable args
;
1071 args
.kind
= bpt
->owner
->type
== bp_catch_catch
?
1072 EX_EVENT_CATCH
: EX_EVENT_THROW
;
1074 val
= catch_errors (cover_target_enable_exception_callback
,
1075 &args
, message
, RETURN_MASK_ALL
);
1076 do_cleanups (cleanups
);
1077 if (val
!= 0 && val
!= -1)
1080 /* Check if something went wrong; val == 0 can be ignored */
1083 /* something went wrong */
1084 fprintf_unfiltered (tmp_error_stream
,
1085 "Cannot insert catchpoint %d; disabling it.\n",
1086 bpt
->owner
->number
);
1087 bpt
->owner
->enable_state
= bp_disabled
;
1094 else if (bpt
->owner
->type
== bp_catch_fork
1095 || bpt
->owner
->type
== bp_catch_vfork
1096 || bpt
->owner
->type
== bp_catch_exec
)
1098 struct gdb_exception e
= catch_exception (uiout
, insert_catchpoint
,
1099 bpt
->owner
, RETURN_MASK_ERROR
);
1100 exception_fprintf (gdb_stderr
, e
, "warning: inserting catchpoint %d: ",
1101 bpt
->owner
->number
);
1103 bpt
->owner
->enable_state
= bp_disabled
;
1107 /* We've already printed an error message if there was a problem
1108 inserting this catchpoint, and we've disabled the catchpoint,
1109 so just return success. */
1116 /* insert_breakpoints is used when starting or continuing the program.
1117 remove_breakpoints is used when the program stops.
1118 Both return zero if successful,
1119 or an `errno' value if could not write the inferior. */
1122 insert_breakpoints (void)
1124 struct bp_location
*b
, *temp
;
1125 int return_val
= 0; /* return success code. */
1127 int disabled_breaks
= 0;
1128 int hw_breakpoint_error
= 0;
1129 int process_warning
= 0;
1131 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1132 make_cleanup_ui_file_delete (tmp_error_stream
);
1134 /* Explicitly mark the warning -- this will only be printed if
1135 there was an error. */
1136 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1138 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1140 /* Permanent breakpoints cannot be inserted or removed. Disabled
1141 breakpoints should not be inserted. */
1142 if (!breakpoint_enabled (b
->owner
))
1145 /* There is no point inserting thread-specific breakpoints if the
1146 thread no longer exists. */
1147 if (b
->owner
->thread
!= -1
1148 && !valid_thread_id (b
->owner
->thread
))
1151 /* FIXME drow/2003-10-07: This code should be pushed elsewhere when
1152 hardware watchpoints are split into multiple loc breakpoints. */
1153 if ((b
->loc_type
== bp_loc_hardware_watchpoint
1154 || b
->owner
->type
== bp_watchpoint
) && !b
->owner
->val
)
1157 val
= evaluate_expression (b
->owner
->exp
);
1158 release_value (val
);
1159 if (value_lazy (val
))
1160 value_fetch_lazy (val
);
1161 b
->owner
->val
= val
;
1164 val
= insert_bp_location (b
, tmp_error_stream
,
1165 &disabled_breaks
, &process_warning
,
1166 &hw_breakpoint_error
);
1173 /* If a hardware breakpoint or watchpoint was inserted, add a
1174 message about possibly exhausted resources. */
1175 if (hw_breakpoint_error
)
1177 fprintf_unfiltered (tmp_error_stream
,
1178 "Could not insert hardware breakpoints:\n\
1179 You may have requested too many hardware breakpoints/watchpoints.\n");
1181 #ifdef ONE_PROCESS_WRITETEXT
1182 if (process_warning
)
1183 fprintf_unfiltered (tmp_error_stream
,
1184 "The same program may be running in another process.");
1186 target_terminal_ours_for_output ();
1187 error_stream (tmp_error_stream
);
1193 remove_breakpoints (void)
1195 struct bp_location
*b
;
1198 ALL_BP_LOCATIONS (b
)
1202 val
= remove_breakpoint (b
, mark_uninserted
);
1211 remove_hw_watchpoints (void)
1213 struct bp_location
*b
;
1216 ALL_BP_LOCATIONS (b
)
1218 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1220 val
= remove_breakpoint (b
, mark_uninserted
);
1229 reattach_breakpoints (int pid
)
1231 struct bp_location
*b
;
1233 struct cleanup
*old_chain
= save_inferior_ptid ();
1235 /* Set inferior_ptid; remove_breakpoint uses this global. */
1236 inferior_ptid
= pid_to_ptid (pid
);
1237 ALL_BP_LOCATIONS (b
)
1241 remove_breakpoint (b
, mark_inserted
);
1242 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1243 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
1245 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
1246 /* FIXME drow/2003-10-07: This doesn't handle any other kinds of
1247 breakpoints. It's wrong for watchpoints, for example. */
1250 do_cleanups (old_chain
);
1255 do_cleanups (old_chain
);
1260 update_breakpoints_after_exec (void)
1262 struct breakpoint
*b
;
1263 struct breakpoint
*temp
;
1265 /* Doing this first prevents the badness of having delete_breakpoint()
1266 write a breakpoint's current "shadow contents" to lift the bp. That
1267 shadow is NOT valid after an exec()! */
1268 mark_breakpoints_out ();
1270 ALL_BREAKPOINTS_SAFE (b
, temp
)
1272 /* Solib breakpoints must be explicitly reset after an exec(). */
1273 if (b
->type
== bp_shlib_event
)
1275 delete_breakpoint (b
);
1279 /* Thread event breakpoints must be set anew after an exec(),
1280 as must overlay event breakpoints. */
1281 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1283 delete_breakpoint (b
);
1287 /* Step-resume breakpoints are meaningless after an exec(). */
1288 if (b
->type
== bp_step_resume
)
1290 delete_breakpoint (b
);
1294 /* Ditto the sigtramp handler breakpoints. */
1295 if (b
->type
== bp_through_sigtramp
)
1297 delete_breakpoint (b
);
1301 /* Ditto the exception-handling catchpoints. */
1302 if ((b
->type
== bp_catch_catch
) || (b
->type
== bp_catch_throw
))
1304 delete_breakpoint (b
);
1308 /* Don't delete an exec catchpoint, because else the inferior
1309 won't stop when it ought!
1311 Similarly, we probably ought to keep vfork catchpoints, 'cause
1312 on this target, we may not be able to stop when the vfork is
1313 seen, but only when the subsequent exec is seen. (And because
1314 deleting fork catchpoints here but not vfork catchpoints will
1315 seem mysterious to users, keep those too.)
1317 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1318 target address field, if any, is sufficient to have it be reset
1319 automagically. Certainly on HP-UX that's true.
1321 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1322 valid code address on some platforms (like the mn10300
1323 simulators). We shouldn't assign any special interpretation to
1324 a breakpoint with a zero address. And in fact, GDB doesn't ---
1325 I can't see what that comment above is talking about. As far
1326 as I can tell, setting the address of a
1327 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1328 is meaningless, since those are implemented with HP-UX kernel
1329 hackery, not by storing breakpoint instructions somewhere. */
1330 if ((b
->type
== bp_catch_exec
) ||
1331 (b
->type
== bp_catch_vfork
) ||
1332 (b
->type
== bp_catch_fork
))
1334 b
->loc
->address
= (CORE_ADDR
) NULL
;
1338 /* bp_finish is a special case. The only way we ought to be able
1339 to see one of these when an exec() has happened, is if the user
1340 caught a vfork, and then said "finish". Ordinarily a finish just
1341 carries them to the call-site of the current callee, by setting
1342 a temporary bp there and resuming. But in this case, the finish
1343 will carry them entirely through the vfork & exec.
1345 We don't want to allow a bp_finish to remain inserted now. But
1346 we can't safely delete it, 'cause finish_command has a handle to
1347 the bp on a bpstat, and will later want to delete it. There's a
1348 chance (and I've seen it happen) that if we delete the bp_finish
1349 here, that its storage will get reused by the time finish_command
1350 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1351 We really must allow finish_command to delete a bp_finish.
1353 In the absense of a general solution for the "how do we know
1354 it's safe to delete something others may have handles to?"
1355 problem, what we'll do here is just uninsert the bp_finish, and
1356 let finish_command delete it.
1358 (We know the bp_finish is "doomed" in the sense that it's
1359 momentary, and will be deleted as soon as finish_command sees
1360 the inferior stopped. So it doesn't matter that the bp's
1361 address is probably bogus in the new a.out, unlike e.g., the
1362 solib breakpoints.) */
1364 if (b
->type
== bp_finish
)
1369 /* Without a symbolic address, we have little hope of the
1370 pre-exec() address meaning the same thing in the post-exec()
1372 if (b
->addr_string
== NULL
)
1374 delete_breakpoint (b
);
1378 /* If this breakpoint has survived the above battery of checks, then
1379 it must have a symbolic address. Be sure that it gets reevaluated
1380 to a target address, rather than reusing the old evaluation.
1382 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1383 for bp_catch_exec and friends, I'm pretty sure this is entirely
1384 unnecessary. A call to breakpoint_re_set_one always recomputes
1385 the breakpoint's address from scratch, or deletes it if it can't.
1386 So I think this assignment could be deleted without effect. */
1387 b
->loc
->address
= (CORE_ADDR
) NULL
;
1389 /* FIXME what about longjmp breakpoints? Re-create them here? */
1390 create_overlay_event_breakpoint ("_ovly_debug_event");
1394 detach_breakpoints (int pid
)
1396 struct bp_location
*b
;
1398 struct cleanup
*old_chain
= save_inferior_ptid ();
1400 if (pid
== PIDGET (inferior_ptid
))
1401 error (_("Cannot detach breakpoints of inferior_ptid"));
1403 /* Set inferior_ptid; remove_breakpoint uses this global. */
1404 inferior_ptid
= pid_to_ptid (pid
);
1405 ALL_BP_LOCATIONS (b
)
1409 val
= remove_breakpoint (b
, mark_inserted
);
1412 do_cleanups (old_chain
);
1417 do_cleanups (old_chain
);
1422 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1426 if (b
->owner
->enable_state
== bp_permanent
)
1427 /* Permanent breakpoints cannot be inserted or removed. */
1430 if (b
->owner
->type
== bp_none
)
1431 warning (_("attempted to remove apparently deleted breakpoint #%d?"),
1434 if (b
->loc_type
== bp_loc_software_breakpoint
1435 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1437 /* "Normal" instruction breakpoint: either the standard
1438 trap-instruction bp (bp_breakpoint), or a
1439 bp_hardware_breakpoint. */
1441 /* First check to see if we have to handle an overlay. */
1442 if (overlay_debugging
== ovly_off
1443 || b
->section
== NULL
1444 || !(section_is_overlay (b
->section
)))
1446 /* No overlay handling: just remove the breakpoint. */
1448 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1449 val
= target_remove_hw_breakpoint (b
->address
,
1450 b
->shadow_contents
);
1452 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1456 /* This breakpoint is in an overlay section.
1457 Did we set a breakpoint at the LMA? */
1458 if (!overlay_events_enabled
)
1460 /* Yes -- overlay event support is not active, so we
1461 should have set a breakpoint at the LMA. Remove it.
1463 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
1465 /* Ignore any failures: if the LMA is in ROM, we will
1466 have already warned when we failed to insert it. */
1467 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1468 target_remove_hw_breakpoint (addr
, b
->shadow_contents
);
1470 target_remove_breakpoint (addr
, b
->shadow_contents
);
1472 /* Did we set a breakpoint at the VMA?
1473 If so, we will have marked the breakpoint 'inserted'. */
1476 /* Yes -- remove it. Previously we did not bother to
1477 remove the breakpoint if the section had been
1478 unmapped, but let's not rely on that being safe. We
1479 don't know what the overlay manager might do. */
1480 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1481 val
= target_remove_hw_breakpoint (b
->address
,
1482 b
->shadow_contents
);
1484 val
= target_remove_breakpoint (b
->address
,
1485 b
->shadow_contents
);
1489 /* No -- not inserted, so no need to remove. No error. */
1495 b
->inserted
= (is
== mark_inserted
);
1497 else if (b
->loc_type
== bp_loc_hardware_watchpoint
1498 && breakpoint_enabled (b
->owner
)
1504 b
->inserted
= (is
== mark_inserted
);
1505 /* Walk down the saved value chain. */
1506 for (v
= b
->owner
->val_chain
; v
; v
= value_next (v
))
1508 /* For each memory reference remove the watchpoint
1510 if (VALUE_LVAL (v
) == lval_memory
1511 && ! value_lazy (v
))
1513 struct type
*vtype
= check_typedef (value_type (v
));
1515 if (v
== b
->owner
->val_chain
1516 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1517 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1522 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
1523 len
= TYPE_LENGTH (value_type (v
));
1525 if (b
->owner
->type
== bp_read_watchpoint
)
1527 else if (b
->owner
->type
== bp_access_watchpoint
)
1530 val
= target_remove_watchpoint (addr
, len
, type
);
1537 /* Failure to remove any of the hardware watchpoints comes here. */
1538 if ((is
== mark_uninserted
) && (b
->inserted
))
1539 warning (_("Could not remove hardware watchpoint %d."),
1542 else if ((b
->owner
->type
== bp_catch_fork
||
1543 b
->owner
->type
== bp_catch_vfork
||
1544 b
->owner
->type
== bp_catch_exec
)
1545 && breakpoint_enabled (b
->owner
)
1549 switch (b
->owner
->type
)
1552 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1554 case bp_catch_vfork
:
1555 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1558 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1561 warning (_("Internal error, %s line %d."), __FILE__
, __LINE__
);
1566 b
->inserted
= (is
== mark_inserted
);
1568 else if ((b
->owner
->type
== bp_catch_catch
||
1569 b
->owner
->type
== bp_catch_throw
)
1570 && breakpoint_enabled (b
->owner
)
1574 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1577 b
->inserted
= (is
== mark_inserted
);
1579 else if (ep_is_exception_catchpoint (b
->owner
)
1580 && b
->inserted
/* sometimes previous insert doesn't happen */
1581 && breakpoint_enabled (b
->owner
)
1585 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1589 b
->inserted
= (is
== mark_inserted
);
1595 /* Clear the "inserted" flag in all breakpoints. */
1598 mark_breakpoints_out (void)
1600 struct bp_location
*bpt
;
1602 ALL_BP_LOCATIONS (bpt
)
1606 /* Clear the "inserted" flag in all breakpoints and delete any
1607 breakpoints which should go away between runs of the program.
1609 Plus other such housekeeping that has to be done for breakpoints
1612 Note: this function gets called at the end of a run (by
1613 generic_mourn_inferior) and when a run begins (by
1614 init_wait_for_inferior). */
1619 breakpoint_init_inferior (enum inf_context context
)
1621 struct breakpoint
*b
, *temp
;
1622 struct bp_location
*bpt
;
1623 static int warning_needed
= 0;
1625 ALL_BP_LOCATIONS (bpt
)
1628 ALL_BREAKPOINTS_SAFE (b
, temp
)
1633 case bp_watchpoint_scope
:
1635 /* If the call dummy breakpoint is at the entry point it will
1636 cause problems when the inferior is rerun, so we better
1639 Also get rid of scope breakpoints. */
1640 delete_breakpoint (b
);
1644 case bp_hardware_watchpoint
:
1645 case bp_read_watchpoint
:
1646 case bp_access_watchpoint
:
1648 /* Likewise for watchpoints on local expressions. */
1649 if (b
->exp_valid_block
!= NULL
)
1650 delete_breakpoint (b
);
1651 if (context
== inf_starting
)
1653 /* Reset val field to force reread of starting value
1654 in insert_breakpoints. */
1656 value_free (b
->val
);
1661 /* Likewise for exception catchpoints in dynamic-linked
1662 executables where required */
1663 if (ep_is_exception_catchpoint (b
)
1664 && deprecated_exception_catchpoints_are_fragile
)
1667 delete_breakpoint (b
);
1673 if (deprecated_exception_catchpoints_are_fragile
)
1674 deprecated_exception_support_initialized
= 0;
1676 /* Don't issue the warning unless it's really needed... */
1677 if (warning_needed
&& (context
!= inf_exited
))
1679 warning (_("Exception catchpoints from last run were deleted.\n"
1680 "You must reinsert them explicitly."));
1685 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1686 exists at PC. It returns ordinary_breakpoint_here if it's an
1687 ordinary breakpoint, or permanent_breakpoint_here if it's a
1688 permanent breakpoint.
1689 - When continuing from a location with an ordinary breakpoint, we
1690 actually single step once before calling insert_breakpoints.
1691 - When continuing from a localion with a permanent breakpoint, we
1692 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1693 the target, to advance the PC past the breakpoint. */
1695 enum breakpoint_here
1696 breakpoint_here_p (CORE_ADDR pc
)
1698 struct bp_location
*bpt
;
1699 int any_breakpoint_here
= 0;
1701 ALL_BP_LOCATIONS (bpt
)
1703 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1704 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1707 if ((breakpoint_enabled (bpt
->owner
)
1708 || bpt
->owner
->enable_state
== bp_permanent
)
1709 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1711 if (overlay_debugging
1712 && section_is_overlay (bpt
->section
)
1713 && !section_is_mapped (bpt
->section
))
1714 continue; /* unmapped overlay -- can't be a match */
1715 else if (bpt
->owner
->enable_state
== bp_permanent
)
1716 return permanent_breakpoint_here
;
1718 any_breakpoint_here
= 1;
1722 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1726 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1727 but it only returns true if there is actually a breakpoint inserted
1731 breakpoint_inserted_here_p (CORE_ADDR pc
)
1733 struct bp_location
*bpt
;
1735 ALL_BP_LOCATIONS (bpt
)
1737 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1738 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1742 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1744 if (overlay_debugging
1745 && section_is_overlay (bpt
->section
)
1746 && !section_is_mapped (bpt
->section
))
1747 continue; /* unmapped overlay -- can't be a match */
1756 /* This function returns non-zero iff there is a software breakpoint
1760 software_breakpoint_inserted_here_p (CORE_ADDR pc
)
1762 struct bp_location
*bpt
;
1763 int any_breakpoint_here
= 0;
1765 ALL_BP_LOCATIONS (bpt
)
1767 if (bpt
->loc_type
!= bp_loc_software_breakpoint
)
1770 if ((breakpoint_enabled (bpt
->owner
)
1771 || bpt
->owner
->enable_state
== bp_permanent
)
1773 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1775 if (overlay_debugging
1776 && section_is_overlay (bpt
->section
)
1777 && !section_is_mapped (bpt
->section
))
1778 continue; /* unmapped overlay -- can't be a match */
1787 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1788 PC is valid for process/thread PTID. */
1791 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1793 struct bp_location
*bpt
;
1796 thread
= pid_to_thread_id (ptid
);
1798 ALL_BP_LOCATIONS (bpt
)
1800 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1801 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1804 if ((breakpoint_enabled (bpt
->owner
)
1805 || bpt
->owner
->enable_state
== bp_permanent
)
1806 && bpt
->address
== pc
1807 && (bpt
->owner
->thread
== -1 || bpt
->owner
->thread
== thread
))
1809 if (overlay_debugging
1810 && section_is_overlay (bpt
->section
)
1811 && !section_is_mapped (bpt
->section
))
1812 continue; /* unmapped overlay -- can't be a match */
1822 /* bpstat stuff. External routines' interfaces are documented
1826 ep_is_catchpoint (struct breakpoint
*ep
)
1829 (ep
->type
== bp_catch_load
)
1830 || (ep
->type
== bp_catch_unload
)
1831 || (ep
->type
== bp_catch_fork
)
1832 || (ep
->type
== bp_catch_vfork
)
1833 || (ep
->type
== bp_catch_exec
)
1834 || (ep
->type
== bp_catch_catch
)
1835 || (ep
->type
== bp_catch_throw
);
1837 /* ??rehrauer: Add more kinds here, as are implemented... */
1841 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1844 (ep
->type
== bp_catch_load
)
1845 || (ep
->type
== bp_catch_unload
);
1849 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1852 (ep
->type
== bp_catch_catch
)
1853 || (ep
->type
== bp_catch_throw
);
1856 /* Clear a bpstat so that it says we are not at any breakpoint.
1857 Also free any storage that is part of a bpstat. */
1860 bpstat_clear (bpstat
*bsp
)
1871 if (p
->old_val
!= NULL
)
1872 value_free (p
->old_val
);
1873 free_command_lines (&p
->commands
);
1880 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1881 is part of the bpstat is copied as well. */
1884 bpstat_copy (bpstat bs
)
1888 bpstat retval
= NULL
;
1893 for (; bs
!= NULL
; bs
= bs
->next
)
1895 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1896 memcpy (tmp
, bs
, sizeof (*tmp
));
1897 if (bs
->commands
!= NULL
)
1898 tmp
->commands
= copy_command_lines (bs
->commands
);
1899 if (bs
->old_val
!= NULL
)
1900 tmp
->old_val
= value_copy (bs
->old_val
);
1903 /* This is the first thing in the chain. */
1913 /* Find the bpstat associated with this breakpoint */
1916 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1921 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1923 if (bsp
->breakpoint_at
== breakpoint
)
1929 /* Find a step_resume breakpoint associated with this bpstat.
1930 (If there are multiple step_resume bp's on the list, this function
1931 will arbitrarily pick one.)
1933 It is an error to use this function if BPSTAT doesn't contain a
1934 step_resume breakpoint.
1936 See wait_for_inferior's use of this function. */
1938 bpstat_find_step_resume_breakpoint (bpstat bsp
)
1942 gdb_assert (bsp
!= NULL
);
1944 current_thread
= pid_to_thread_id (inferior_ptid
);
1946 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1948 if ((bsp
->breakpoint_at
!= NULL
) &&
1949 (bsp
->breakpoint_at
->type
== bp_step_resume
) &&
1950 (bsp
->breakpoint_at
->thread
== current_thread
||
1951 bsp
->breakpoint_at
->thread
== -1))
1952 return bsp
->breakpoint_at
;
1955 internal_error (__FILE__
, __LINE__
, _("No step_resume breakpoint found."));
1959 /* Return the breakpoint number of the first breakpoint we are stopped
1960 at. *BSP upon return is a bpstat which points to the remaining
1961 breakpoints stopped at (but which is not guaranteed to be good for
1962 anything but further calls to bpstat_num).
1963 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1966 bpstat_num (bpstat
*bsp
)
1968 struct breakpoint
*b
;
1971 return 0; /* No more breakpoint values */
1974 b
= (*bsp
)->breakpoint_at
;
1975 *bsp
= (*bsp
)->next
;
1977 return -1; /* breakpoint that's been deleted since */
1979 return b
->number
; /* We have its number */
1983 /* Modify BS so that the actions will not be performed. */
1986 bpstat_clear_actions (bpstat bs
)
1988 for (; bs
!= NULL
; bs
= bs
->next
)
1990 free_command_lines (&bs
->commands
);
1991 if (bs
->old_val
!= NULL
)
1993 value_free (bs
->old_val
);
1999 /* Stub for cleaning up our state if we error-out of a breakpoint command */
2001 cleanup_executing_breakpoints (void *ignore
)
2003 executing_breakpoint_commands
= 0;
2006 /* Execute all the commands associated with all the breakpoints at this
2007 location. Any of these commands could cause the process to proceed
2008 beyond this point, etc. We look out for such changes by checking
2009 the global "breakpoint_proceeded" after each command. */
2012 bpstat_do_actions (bpstat
*bsp
)
2015 struct cleanup
*old_chain
;
2017 /* Avoid endless recursion if a `source' command is contained
2019 if (executing_breakpoint_commands
)
2022 executing_breakpoint_commands
= 1;
2023 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
2026 /* Note that (as of this writing), our callers all appear to
2027 be passing us the address of global stop_bpstat. And, if
2028 our calls to execute_control_command cause the inferior to
2029 proceed, that global (and hence, *bsp) will change.
2031 We must be careful to not touch *bsp unless the inferior
2032 has not proceeded. */
2034 /* This pointer will iterate over the list of bpstat's. */
2037 breakpoint_proceeded
= 0;
2038 for (; bs
!= NULL
; bs
= bs
->next
)
2040 struct command_line
*cmd
;
2041 struct cleanup
*this_cmd_tree_chain
;
2043 /* Take ownership of the BSP's command tree, if it has one.
2045 The command tree could legitimately contain commands like
2046 'step' and 'next', which call clear_proceed_status, which
2047 frees stop_bpstat's command tree. To make sure this doesn't
2048 free the tree we're executing out from under us, we need to
2049 take ownership of the tree ourselves. Since a given bpstat's
2050 commands are only executed once, we don't need to copy it; we
2051 can clear the pointer in the bpstat, and make sure we free
2052 the tree when we're done. */
2055 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2059 execute_control_command (cmd
);
2061 if (breakpoint_proceeded
)
2067 /* We can free this command tree now. */
2068 do_cleanups (this_cmd_tree_chain
);
2070 if (breakpoint_proceeded
)
2071 /* The inferior is proceeded by the command; bomb out now.
2072 The bpstat chain has been blown away by wait_for_inferior.
2073 But since execution has stopped again, there is a new bpstat
2074 to look at, so start over. */
2077 do_cleanups (old_chain
);
2080 /* This is the normal print function for a bpstat. In the future,
2081 much of this logic could (should?) be moved to bpstat_stop_status,
2082 by having it set different print_it values.
2084 Current scheme: When we stop, bpstat_print() is called. It loops
2085 through the bpstat list of things causing this stop, calling the
2086 print_bp_stop_message function on each one. The behavior of the
2087 print_bp_stop_message function depends on the print_it field of
2088 bpstat. If such field so indicates, call this function here.
2090 Return values from this routine (ultimately used by bpstat_print()
2091 and normal_stop() to decide what to do):
2092 PRINT_NOTHING: Means we already printed all we needed to print,
2093 don't print anything else.
2094 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2095 that something to be followed by a location.
2096 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2097 that something to be followed by a location.
2098 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2101 static enum print_stop_action
2102 print_it_typical (bpstat bs
)
2104 struct cleanup
*old_chain
, *ui_out_chain
;
2105 struct ui_stream
*stb
;
2106 stb
= ui_out_stream_new (uiout
);
2107 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2108 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2109 which has since been deleted. */
2110 if (bs
->breakpoint_at
== NULL
)
2111 return PRINT_UNKNOWN
;
2113 switch (bs
->breakpoint_at
->type
)
2116 case bp_hardware_breakpoint
:
2117 if (bs
->breakpoint_at
->loc
->address
!= bs
->breakpoint_at
->loc
->requested_address
)
2118 breakpoint_adjustment_warning (bs
->breakpoint_at
->loc
->requested_address
,
2119 bs
->breakpoint_at
->loc
->address
,
2120 bs
->breakpoint_at
->number
, 1);
2121 annotate_breakpoint (bs
->breakpoint_at
->number
);
2122 ui_out_text (uiout
, "\nBreakpoint ");
2123 if (ui_out_is_mi_like_p (uiout
))
2124 ui_out_field_string (uiout
, "reason",
2125 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
2126 ui_out_field_int (uiout
, "bkptno", bs
->breakpoint_at
->number
);
2127 ui_out_text (uiout
, ", ");
2128 return PRINT_SRC_AND_LOC
;
2131 case bp_shlib_event
:
2132 /* Did we stop because the user set the stop_on_solib_events
2133 variable? (If so, we report this as a generic, "Stopped due
2134 to shlib event" message.) */
2135 printf_filtered (_("Stopped due to shared library event\n"));
2136 return PRINT_NOTHING
;
2139 case bp_thread_event
:
2140 /* Not sure how we will get here.
2141 GDB should not stop for these breakpoints. */
2142 printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n"));
2143 return PRINT_NOTHING
;
2146 case bp_overlay_event
:
2147 /* By analogy with the thread event, GDB should not stop for these. */
2148 printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n"));
2149 return PRINT_NOTHING
;
2153 annotate_catchpoint (bs
->breakpoint_at
->number
);
2154 printf_filtered (_("\nCatchpoint %d (loaded %s), "),
2155 bs
->breakpoint_at
->number
,
2156 bs
->breakpoint_at
->triggered_dll_pathname
);
2157 return PRINT_SRC_AND_LOC
;
2160 case bp_catch_unload
:
2161 annotate_catchpoint (bs
->breakpoint_at
->number
);
2162 printf_filtered (_("\nCatchpoint %d (unloaded %s), "),
2163 bs
->breakpoint_at
->number
,
2164 bs
->breakpoint_at
->triggered_dll_pathname
);
2165 return PRINT_SRC_AND_LOC
;
2169 annotate_catchpoint (bs
->breakpoint_at
->number
);
2170 printf_filtered (_("\nCatchpoint %d (forked process %d), "),
2171 bs
->breakpoint_at
->number
,
2172 bs
->breakpoint_at
->forked_inferior_pid
);
2173 return PRINT_SRC_AND_LOC
;
2176 case bp_catch_vfork
:
2177 annotate_catchpoint (bs
->breakpoint_at
->number
);
2178 printf_filtered (_("\nCatchpoint %d (vforked process %d), "),
2179 bs
->breakpoint_at
->number
,
2180 bs
->breakpoint_at
->forked_inferior_pid
);
2181 return PRINT_SRC_AND_LOC
;
2185 annotate_catchpoint (bs
->breakpoint_at
->number
);
2186 printf_filtered (_("\nCatchpoint %d (exec'd %s), "),
2187 bs
->breakpoint_at
->number
,
2188 bs
->breakpoint_at
->exec_pathname
);
2189 return PRINT_SRC_AND_LOC
;
2192 case bp_catch_catch
:
2193 if (current_exception_event
&&
2194 (CURRENT_EXCEPTION_KIND
== EX_EVENT_CATCH
))
2196 annotate_catchpoint (bs
->breakpoint_at
->number
);
2197 printf_filtered (_("\nCatchpoint %d (exception caught), "),
2198 bs
->breakpoint_at
->number
);
2199 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2200 printf_filtered (_("throw location %s:%d, "),
2201 CURRENT_EXCEPTION_THROW_FILE
,
2202 CURRENT_EXCEPTION_THROW_LINE
);
2204 printf_filtered (_("throw location unknown, "));
2206 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2207 printf_filtered (_("catch location %s:%d\n"),
2208 CURRENT_EXCEPTION_CATCH_FILE
,
2209 CURRENT_EXCEPTION_CATCH_LINE
);
2211 printf_filtered (_("catch location unknown\n"));
2213 /* don't bother to print location frame info */
2214 return PRINT_SRC_ONLY
;
2218 /* really throw, some other bpstat will handle it */
2219 return PRINT_UNKNOWN
;
2223 case bp_catch_throw
:
2224 if (current_exception_event
&&
2225 (CURRENT_EXCEPTION_KIND
== EX_EVENT_THROW
))
2227 annotate_catchpoint (bs
->breakpoint_at
->number
);
2228 printf_filtered (_("\nCatchpoint %d (exception thrown), "),
2229 bs
->breakpoint_at
->number
);
2230 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2231 printf_filtered (_("throw location %s:%d, "),
2232 CURRENT_EXCEPTION_THROW_FILE
,
2233 CURRENT_EXCEPTION_THROW_LINE
);
2235 printf_filtered (_("throw location unknown, "));
2237 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2238 printf_filtered (_("catch location %s:%d\n"),
2239 CURRENT_EXCEPTION_CATCH_FILE
,
2240 CURRENT_EXCEPTION_CATCH_LINE
);
2242 printf_filtered (_("catch location unknown\n"));
2244 /* don't bother to print location frame info */
2245 return PRINT_SRC_ONLY
;
2249 /* really catch, some other bpstat will handle it */
2250 return PRINT_UNKNOWN
;
2255 case bp_hardware_watchpoint
:
2256 if (bs
->old_val
!= NULL
)
2258 annotate_watchpoint (bs
->breakpoint_at
->number
);
2259 if (ui_out_is_mi_like_p (uiout
))
2262 async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER
));
2263 mention (bs
->breakpoint_at
);
2264 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2265 ui_out_text (uiout
, "\nOld value = ");
2266 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2267 ui_out_field_stream (uiout
, "old", stb
);
2268 ui_out_text (uiout
, "\nNew value = ");
2269 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2270 ui_out_field_stream (uiout
, "new", stb
);
2271 do_cleanups (ui_out_chain
);
2272 ui_out_text (uiout
, "\n");
2273 value_free (bs
->old_val
);
2276 /* More than one watchpoint may have been triggered. */
2277 return PRINT_UNKNOWN
;
2280 case bp_read_watchpoint
:
2281 if (ui_out_is_mi_like_p (uiout
))
2284 async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER
));
2285 mention (bs
->breakpoint_at
);
2286 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2287 ui_out_text (uiout
, "\nValue = ");
2288 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2289 ui_out_field_stream (uiout
, "value", stb
);
2290 do_cleanups (ui_out_chain
);
2291 ui_out_text (uiout
, "\n");
2292 return PRINT_UNKNOWN
;
2295 case bp_access_watchpoint
:
2296 if (bs
->old_val
!= NULL
)
2298 annotate_watchpoint (bs
->breakpoint_at
->number
);
2299 if (ui_out_is_mi_like_p (uiout
))
2302 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2303 mention (bs
->breakpoint_at
);
2304 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2305 ui_out_text (uiout
, "\nOld value = ");
2306 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2307 ui_out_field_stream (uiout
, "old", stb
);
2308 value_free (bs
->old_val
);
2310 ui_out_text (uiout
, "\nNew value = ");
2314 mention (bs
->breakpoint_at
);
2315 if (ui_out_is_mi_like_p (uiout
))
2318 async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER
));
2319 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2320 ui_out_text (uiout
, "\nValue = ");
2322 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0,Val_pretty_default
);
2323 ui_out_field_stream (uiout
, "new", stb
);
2324 do_cleanups (ui_out_chain
);
2325 ui_out_text (uiout
, "\n");
2326 return PRINT_UNKNOWN
;
2329 /* Fall through, we don't deal with these types of breakpoints
2333 if (ui_out_is_mi_like_p (uiout
))
2336 async_reason_lookup (EXEC_ASYNC_FUNCTION_FINISHED
));
2337 return PRINT_UNKNOWN
;
2341 if (ui_out_is_mi_like_p (uiout
))
2342 ui_out_field_string (uiout
, "reason", "location-reached");
2343 return PRINT_UNKNOWN
;
2348 case bp_longjmp_resume
:
2349 case bp_step_resume
:
2350 case bp_through_sigtramp
:
2351 case bp_watchpoint_scope
:
2354 return PRINT_UNKNOWN
;
2358 /* Generic routine for printing messages indicating why we
2359 stopped. The behavior of this function depends on the value
2360 'print_it' in the bpstat structure. Under some circumstances we
2361 may decide not to print anything here and delegate the task to
2364 static enum print_stop_action
2365 print_bp_stop_message (bpstat bs
)
2367 switch (bs
->print_it
)
2370 /* Nothing should be printed for this bpstat entry. */
2371 return PRINT_UNKNOWN
;
2375 /* We still want to print the frame, but we already printed the
2376 relevant messages. */
2377 return PRINT_SRC_AND_LOC
;
2380 case print_it_normal
:
2381 /* Normal case. Call the breakpoint's print_it method, or
2382 print_it_typical. */
2383 if (bs
->breakpoint_at
!= NULL
&& bs
->breakpoint_at
->ops
!= NULL
2384 && bs
->breakpoint_at
->ops
->print_it
!= NULL
)
2385 return bs
->breakpoint_at
->ops
->print_it (bs
->breakpoint_at
);
2387 return print_it_typical (bs
);
2391 internal_error (__FILE__
, __LINE__
,
2392 _("print_bp_stop_message: unrecognized enum value"));
2397 /* Print a message indicating what happened. This is called from
2398 normal_stop(). The input to this routine is the head of the bpstat
2399 list - a list of the eventpoints that caused this stop. This
2400 routine calls the generic print routine for printing a message
2401 about reasons for stopping. This will print (for example) the
2402 "Breakpoint n," part of the output. The return value of this
2405 PRINT_UNKNOWN: Means we printed nothing
2406 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2407 code to print the location. An example is
2408 "Breakpoint 1, " which should be followed by
2410 PRINT_SRC_ONLY: Means we printed something, but there is no need
2411 to also print the location part of the message.
2412 An example is the catch/throw messages, which
2413 don't require a location appended to the end.
2414 PRINT_NOTHING: We have done some printing and we don't need any
2415 further info to be printed.*/
2417 enum print_stop_action
2418 bpstat_print (bpstat bs
)
2422 /* Maybe another breakpoint in the chain caused us to stop.
2423 (Currently all watchpoints go on the bpstat whether hit or not.
2424 That probably could (should) be changed, provided care is taken
2425 with respect to bpstat_explains_signal). */
2426 for (; bs
; bs
= bs
->next
)
2428 val
= print_bp_stop_message (bs
);
2429 if (val
== PRINT_SRC_ONLY
2430 || val
== PRINT_SRC_AND_LOC
2431 || val
== PRINT_NOTHING
)
2435 /* We reached the end of the chain, or we got a null BS to start
2436 with and nothing was printed. */
2437 return PRINT_UNKNOWN
;
2440 /* Evaluate the expression EXP and return 1 if value is zero.
2441 This is used inside a catch_errors to evaluate the breakpoint condition.
2442 The argument is a "struct expression *" that has been cast to char * to
2443 make it pass through catch_errors. */
2446 breakpoint_cond_eval (void *exp
)
2448 struct value
*mark
= value_mark ();
2449 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2450 value_free_to_mark (mark
);
2454 /* Allocate a new bpstat and chain it to the current one. */
2457 bpstat_alloc (struct breakpoint
*b
, bpstat cbs
/* Current "bs" value */ )
2461 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2463 bs
->breakpoint_at
= b
;
2464 /* If the condition is false, etc., don't do the commands. */
2465 bs
->commands
= NULL
;
2467 bs
->print_it
= print_it_normal
;
2471 /* Possible return values for watchpoint_check (this can't be an enum
2472 because of check_errors). */
2473 /* The watchpoint has been deleted. */
2474 #define WP_DELETED 1
2475 /* The value has changed. */
2476 #define WP_VALUE_CHANGED 2
2477 /* The value has not changed. */
2478 #define WP_VALUE_NOT_CHANGED 3
2480 #define BP_TEMPFLAG 1
2481 #define BP_HARDWAREFLAG 2
2483 /* Check watchpoint condition. */
2486 watchpoint_check (void *p
)
2488 bpstat bs
= (bpstat
) p
;
2489 struct breakpoint
*b
;
2490 struct frame_info
*fr
;
2491 int within_current_scope
;
2493 b
= bs
->breakpoint_at
;
2495 if (b
->exp_valid_block
== NULL
)
2496 within_current_scope
= 1;
2499 /* There is no current frame at this moment. If we're going to have
2500 any chance of handling watchpoints on local variables, we'll need
2501 the frame chain (so we can determine if we're in scope). */
2502 reinit_frame_cache ();
2503 fr
= frame_find_by_id (b
->watchpoint_frame
);
2504 within_current_scope
= (fr
!= NULL
);
2505 /* in_function_epilogue_p() returns a non-zero value if we're still
2506 in the function but the stack frame has already been invalidated.
2507 Since we can't rely on the values of local variables after the
2508 stack has been destroyed, we are treating the watchpoint in that
2509 state as `not changed' without further checking.
2511 vinschen/2003-09-04: The former implementation left out the case
2512 that the watchpoint frame couldn't be found by frame_find_by_id()
2513 because the current PC is currently in an epilogue. Calling
2514 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2515 if ((!within_current_scope
|| fr
== get_current_frame ())
2516 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2517 return WP_VALUE_NOT_CHANGED
;
2518 if (fr
&& within_current_scope
)
2519 /* If we end up stopping, the current frame will get selected
2520 in normal_stop. So this call to select_frame won't affect
2525 if (within_current_scope
)
2527 /* We use value_{,free_to_}mark because it could be a
2528 *long* time before we return to the command level and
2529 call free_all_values. We can't call free_all_values because
2530 we might be in the middle of evaluating a function call. */
2532 struct value
*mark
= value_mark ();
2533 struct value
*new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
2534 if (!value_equal (b
->val
, new_val
))
2536 release_value (new_val
);
2537 value_free_to_mark (mark
);
2538 bs
->old_val
= b
->val
;
2540 /* We will stop here */
2541 return WP_VALUE_CHANGED
;
2545 /* Nothing changed, don't do anything. */
2546 value_free_to_mark (mark
);
2547 /* We won't stop here */
2548 return WP_VALUE_NOT_CHANGED
;
2553 /* This seems like the only logical thing to do because
2554 if we temporarily ignored the watchpoint, then when
2555 we reenter the block in which it is valid it contains
2556 garbage (in the case of a function, it may have two
2557 garbage values, one before and one after the prologue).
2558 So we can't even detect the first assignment to it and
2559 watch after that (since the garbage may or may not equal
2560 the first value assigned). */
2561 /* We print all the stop information in print_it_typical(), but
2562 in this case, by the time we call print_it_typical() this bp
2563 will be deleted already. So we have no choice but print the
2564 information here. */
2565 if (ui_out_is_mi_like_p (uiout
))
2567 (uiout
, "reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_SCOPE
));
2568 ui_out_text (uiout
, "\nWatchpoint ");
2569 ui_out_field_int (uiout
, "wpnum", bs
->breakpoint_at
->number
);
2570 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2571 which its expression is valid.\n");
2573 if (b
->related_breakpoint
)
2574 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2575 b
->disposition
= disp_del_at_next_stop
;
2581 /* Get a bpstat associated with having just stopped at address
2582 BP_ADDR in thread PTID. STOPPED_BY_WATCHPOINT is 1 if the
2583 target thinks we stopped due to a hardware watchpoint, 0 if we
2584 know we did not trigger a hardware watchpoint, and -1 if we do not know. */
2586 /* Determine whether we stopped at a breakpoint, etc, or whether we
2587 don't understand this stop. Result is a chain of bpstat's such that:
2589 if we don't understand the stop, the result is a null pointer.
2591 if we understand why we stopped, the result is not null.
2593 Each element of the chain refers to a particular breakpoint or
2594 watchpoint at which we have stopped. (We may have stopped for
2595 several reasons concurrently.)
2597 Each element of the chain has valid next, breakpoint_at,
2598 commands, FIXME??? fields. */
2601 bpstat_stop_status (CORE_ADDR bp_addr
, ptid_t ptid
, int stopped_by_watchpoint
)
2603 struct breakpoint
*b
, *temp
;
2604 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2605 int real_breakpoint
= 0;
2606 /* Root of the chain of bpstat's */
2607 struct bpstats root_bs
[1];
2608 /* Pointer to the last thing in the chain currently. */
2609 bpstat bs
= root_bs
;
2610 int thread_id
= pid_to_thread_id (ptid
);
2612 ALL_BREAKPOINTS_SAFE (b
, temp
)
2614 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
2617 if (b
->type
!= bp_watchpoint
2618 && b
->type
!= bp_hardware_watchpoint
2619 && b
->type
!= bp_read_watchpoint
2620 && b
->type
!= bp_access_watchpoint
2621 && b
->type
!= bp_hardware_breakpoint
2622 && b
->type
!= bp_catch_fork
2623 && b
->type
!= bp_catch_vfork
2624 && b
->type
!= bp_catch_exec
2625 && b
->type
!= bp_catch_catch
2626 && b
->type
!= bp_catch_throw
) /* a non-watchpoint bp */
2628 if (b
->loc
->address
!= bp_addr
) /* address doesn't match */
2630 if (overlay_debugging
/* unmapped overlay section */
2631 && section_is_overlay (b
->loc
->section
)
2632 && !section_is_mapped (b
->loc
->section
))
2636 /* Continuable hardware watchpoints are treated as non-existent if the
2637 reason we stopped wasn't a hardware watchpoint (we didn't stop on
2638 some data address). Otherwise gdb won't stop on a break instruction
2639 in the code (not from a breakpoint) when a hardware watchpoint has
2642 if ((b
->type
== bp_hardware_watchpoint
2643 || b
->type
== bp_read_watchpoint
2644 || b
->type
== bp_access_watchpoint
)
2645 && !stopped_by_watchpoint
)
2648 if (b
->type
== bp_hardware_breakpoint
)
2650 if (b
->loc
->address
!= bp_addr
)
2652 if (overlay_debugging
/* unmapped overlay section */
2653 && section_is_overlay (b
->loc
->section
)
2654 && !section_is_mapped (b
->loc
->section
))
2658 /* Is this a catchpoint of a load or unload? If so, did we
2659 get a load or unload of the specified library? If not,
2661 if ((b
->type
== bp_catch_load
)
2662 #if defined(SOLIB_HAVE_LOAD_EVENT)
2663 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2664 || ((b
->dll_pathname
!= NULL
)
2665 && (strcmp (b
->dll_pathname
,
2666 SOLIB_LOADED_LIBRARY_PATHNAME (
2667 PIDGET (inferior_ptid
)))
2673 if ((b
->type
== bp_catch_unload
)
2674 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2675 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2676 || ((b
->dll_pathname
!= NULL
)
2677 && (strcmp (b
->dll_pathname
,
2678 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2679 PIDGET (inferior_ptid
)))
2685 if ((b
->type
== bp_catch_fork
)
2686 && !inferior_has_forked (PIDGET (inferior_ptid
),
2687 &b
->forked_inferior_pid
))
2690 if ((b
->type
== bp_catch_vfork
)
2691 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2692 &b
->forked_inferior_pid
))
2695 if ((b
->type
== bp_catch_exec
)
2696 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2699 if (ep_is_exception_catchpoint (b
) &&
2700 !(current_exception_event
= target_get_current_exception_event ()))
2703 /* Come here if it's a watchpoint, or if the break address matches */
2705 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
2707 /* Watchpoints may change this, if not found to have triggered. */
2711 if (b
->type
== bp_watchpoint
||
2712 b
->type
== bp_hardware_watchpoint
)
2714 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2716 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2717 int e
= catch_errors (watchpoint_check
, bs
, message
,
2719 do_cleanups (cleanups
);
2723 /* We've already printed what needs to be printed. */
2724 /* Actually this is superfluous, because by the time we
2725 call print_it_typical() the wp will be already deleted,
2726 and the function will return immediately. */
2727 bs
->print_it
= print_it_done
;
2730 case WP_VALUE_CHANGED
:
2734 case WP_VALUE_NOT_CHANGED
:
2736 bs
->print_it
= print_it_noop
;
2743 /* Error from catch_errors. */
2744 printf_filtered (_("Watchpoint %d deleted.\n"), b
->number
);
2745 if (b
->related_breakpoint
)
2746 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2747 b
->disposition
= disp_del_at_next_stop
;
2748 /* We've already printed what needs to be printed. */
2749 bs
->print_it
= print_it_done
;
2755 else if (b
->type
== bp_read_watchpoint
||
2756 b
->type
== bp_access_watchpoint
)
2762 if (!target_stopped_data_address (¤t_target
, &addr
))
2764 for (v
= b
->val_chain
; v
; v
= value_next (v
))
2766 if (VALUE_LVAL (v
) == lval_memory
2767 && ! value_lazy (v
))
2769 struct type
*vtype
= check_typedef (value_type (v
));
2771 if (v
== b
->val_chain
2772 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
2773 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
2777 vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
2778 /* Exact match not required. Within range is
2780 if (addr
>= vaddr
&&
2781 addr
< vaddr
+ TYPE_LENGTH (value_type (v
)))
2788 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2790 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2791 int e
= catch_errors (watchpoint_check
, bs
, message
,
2793 do_cleanups (cleanups
);
2797 /* We've already printed what needs to be printed. */
2798 bs
->print_it
= print_it_done
;
2801 case WP_VALUE_CHANGED
:
2802 if (b
->type
== bp_read_watchpoint
)
2804 /* Don't stop: read watchpoints shouldn't fire if
2805 the value has changed. This is for targets
2806 which cannot set read-only watchpoints. */
2807 bs
->print_it
= print_it_noop
;
2813 case WP_VALUE_NOT_CHANGED
:
2820 /* Error from catch_errors. */
2821 printf_filtered (_("Watchpoint %d deleted.\n"), b
->number
);
2822 if (b
->related_breakpoint
)
2823 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2824 b
->disposition
= disp_del_at_next_stop
;
2825 /* We've already printed what needs to be printed. */
2826 bs
->print_it
= print_it_done
;
2830 else /* found == 0 */
2832 /* This is a case where some watchpoint(s) triggered,
2833 but not at the address of this watchpoint (FOUND
2834 was left zero). So don't print anything for this
2836 bs
->print_it
= print_it_noop
;
2843 /* By definition, an encountered breakpoint is a triggered
2847 real_breakpoint
= 1;
2850 if (frame_id_p (b
->frame_id
)
2851 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2855 int value_is_zero
= 0;
2859 /* Need to select the frame, with all that implies
2860 so that the conditions will have the right context. */
2861 select_frame (get_current_frame ());
2863 = catch_errors (breakpoint_cond_eval
, (b
->cond
),
2864 "Error in testing breakpoint condition:\n",
2866 /* FIXME-someday, should give breakpoint # */
2869 if (b
->cond
&& value_is_zero
)
2872 /* Don't consider this a hit. */
2875 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
2878 /* Don't consider this a hit. */
2881 else if (b
->ignore_count
> 0)
2884 annotate_ignore_count_change ();
2889 /* We will stop here */
2890 if (b
->disposition
== disp_disable
)
2891 b
->enable_state
= bp_disabled
;
2894 bs
->commands
= b
->commands
;
2896 (strcmp ("silent", bs
->commands
->line
) == 0
2897 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
2899 bs
->commands
= bs
->commands
->next
;
2902 bs
->commands
= copy_command_lines (bs
->commands
);
2905 /* Print nothing for this entry if we dont stop or if we dont print. */
2906 if (bs
->stop
== 0 || bs
->print
== 0)
2907 bs
->print_it
= print_it_noop
;
2910 bs
->next
= NULL
; /* Terminate the chain */
2911 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2913 /* The value of a hardware watchpoint hasn't changed, but the
2914 intermediate memory locations we are watching may have. */
2915 if (bs
&& !bs
->stop
&&
2916 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2917 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2918 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2920 remove_breakpoints ();
2921 insert_breakpoints ();
2926 /* Tell what to do about this bpstat. */
2928 bpstat_what (bpstat bs
)
2930 /* Classify each bpstat as one of the following. */
2933 /* This bpstat element has no effect on the main_action. */
2936 /* There was a watchpoint, stop but don't print. */
2939 /* There was a watchpoint, stop and print. */
2942 /* There was a breakpoint but we're not stopping. */
2945 /* There was a breakpoint, stop but don't print. */
2948 /* There was a breakpoint, stop and print. */
2951 /* We hit the longjmp breakpoint. */
2954 /* We hit the longjmp_resume breakpoint. */
2957 /* We hit the step_resume breakpoint. */
2960 /* We hit the through_sigtramp breakpoint. */
2963 /* We hit the shared library event breakpoint. */
2966 /* We caught a shared library event. */
2969 /* This is just used to count how many enums there are. */
2973 /* Here is the table which drives this routine. So that we can
2974 format it pretty, we define some abbreviations for the
2975 enum bpstat_what codes. */
2976 #define kc BPSTAT_WHAT_KEEP_CHECKING
2977 #define ss BPSTAT_WHAT_STOP_SILENT
2978 #define sn BPSTAT_WHAT_STOP_NOISY
2979 #define sgl BPSTAT_WHAT_SINGLE
2980 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2981 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2982 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2983 #define sr BPSTAT_WHAT_STEP_RESUME
2984 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2985 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2986 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2988 /* "Can't happen." Might want to print an error message.
2989 abort() is not out of the question, but chances are GDB is just
2990 a bit confused, not unusable. */
2991 #define err BPSTAT_WHAT_STOP_NOISY
2993 /* Given an old action and a class, come up with a new action. */
2994 /* One interesting property of this table is that wp_silent is the same
2995 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2996 after stopping, the check for whether to step over a breakpoint
2997 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2998 reference to how we stopped. We retain separate wp_silent and
2999 bp_silent codes in case we want to change that someday.
3001 Another possibly interesting property of this table is that
3002 there's a partial ordering, priority-like, of the actions. Once
3003 you've decided that some action is appropriate, you'll never go
3004 back and decide something of a lower priority is better. The
3007 kc < clr sgl shl shlr slr sn sr ss ts
3008 sgl < clrs shl shlr slr sn sr ss ts
3009 slr < err shl shlr sn sr ss ts
3010 clr < clrs err shl shlr sn sr ss ts
3011 clrs < err shl shlr sn sr ss ts
3012 ss < shl shlr sn sr ts
3019 What I think this means is that we don't need a damned table
3020 here. If you just put the rows and columns in the right order,
3021 it'd look awfully regular. We could simply walk the bpstat list
3022 and choose the highest priority action we find, with a little
3023 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
3024 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
3025 is messy anyway). */
3027 /* step_resume entries: a step resume breakpoint overrides another
3028 breakpoint of signal handling (see comment in wait_for_inferior
3029 at where we set the step_resume breakpoint). */
3030 /* We handle the through_sigtramp_breakpoint the same way; having both
3031 one of those and a step_resume_breakpoint is probably very rare (?). */
3033 static const enum bpstat_what_main_action
3034 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3037 /* kc ss sn sgl slr clr clrs sr ts shl shlr
3040 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, ts
, shl
, shlr
},
3042 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3044 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3046 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, ts
, shl
, shlr
},
3048 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3050 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3052 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, ts
, shl
, shlr
},
3054 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, ts
, shl
, shlr
},
3056 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, ts
, shl
, shlr
},
3058 {ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, shl
, shlr
},
3060 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, shl
, ts
, shl
, shlr
},
3062 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, ts
, shlr
, shlr
}
3077 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3078 struct bpstat_what retval
;
3080 retval
.call_dummy
= 0;
3081 for (; bs
!= NULL
; bs
= bs
->next
)
3083 enum class bs_class
= no_effect
;
3084 if (bs
->breakpoint_at
== NULL
)
3085 /* I suspect this can happen if it was a momentary breakpoint
3086 which has since been deleted. */
3088 switch (bs
->breakpoint_at
->type
)
3094 case bp_hardware_breakpoint
:
3100 bs_class
= bp_noisy
;
3102 bs_class
= bp_silent
;
3105 bs_class
= bp_nostop
;
3108 case bp_hardware_watchpoint
:
3109 case bp_read_watchpoint
:
3110 case bp_access_watchpoint
:
3114 bs_class
= wp_noisy
;
3116 bs_class
= wp_silent
;
3119 /* There was a watchpoint, but we're not stopping.
3120 This requires no further action. */
3121 bs_class
= no_effect
;
3124 bs_class
= long_jump
;
3126 case bp_longjmp_resume
:
3127 bs_class
= long_resume
;
3129 case bp_step_resume
:
3132 bs_class
= step_resume
;
3135 /* It is for the wrong frame. */
3136 bs_class
= bp_nostop
;
3138 case bp_through_sigtramp
:
3139 bs_class
= through_sig
;
3141 case bp_watchpoint_scope
:
3142 bs_class
= bp_nostop
;
3144 case bp_shlib_event
:
3145 bs_class
= shlib_event
;
3147 case bp_thread_event
:
3148 case bp_overlay_event
:
3149 bs_class
= bp_nostop
;
3152 case bp_catch_unload
:
3153 /* Only if this catchpoint triggered should we cause the
3154 step-out-of-dld behaviour. Otherwise, we ignore this
3157 bs_class
= catch_shlib_event
;
3159 bs_class
= no_effect
;
3162 case bp_catch_vfork
:
3167 bs_class
= bp_noisy
;
3169 bs_class
= bp_silent
;
3172 /* There was a catchpoint, but we're not stopping.
3173 This requires no further action. */
3174 bs_class
= no_effect
;
3176 case bp_catch_catch
:
3177 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
3178 bs_class
= bp_nostop
;
3180 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3182 case bp_catch_throw
:
3183 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
3184 bs_class
= bp_nostop
;
3186 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3189 /* Make sure the action is stop (silent or noisy),
3190 so infrun.c pops the dummy frame. */
3191 bs_class
= bp_silent
;
3192 retval
.call_dummy
= 1;
3195 current_action
= table
[(int) bs_class
][(int) current_action
];
3197 retval
.main_action
= current_action
;
3201 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3202 without hardware support). This isn't related to a specific bpstat,
3203 just to things like whether watchpoints are set. */
3206 bpstat_should_step (void)
3208 struct breakpoint
*b
;
3210 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
)
3215 /* Nonzero if there are enabled hardware watchpoints. */
3217 bpstat_have_active_hw_watchpoints (void)
3219 struct bp_location
*bpt
;
3220 ALL_BP_LOCATIONS (bpt
)
3221 if (breakpoint_enabled (bpt
->owner
)
3223 && bpt
->loc_type
== bp_loc_hardware_watchpoint
)
3229 /* Given a bpstat that records zero or more triggered eventpoints, this
3230 function returns another bpstat which contains only the catchpoints
3231 on that first list, if any. */
3233 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3235 struct bpstats root_bs
[1];
3236 bpstat bs
= root_bs
;
3237 struct breakpoint
*ep
;
3240 bpstat_clear (cp_list
);
3241 root_bs
->next
= NULL
;
3243 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3245 /* Is this eventpoint a catchpoint? If not, ignore it. */
3246 ep
= ep_list
->breakpoint_at
;
3249 if ((ep
->type
!= bp_catch_load
) &&
3250 (ep
->type
!= bp_catch_unload
) &&
3251 (ep
->type
!= bp_catch_catch
) &&
3252 (ep
->type
!= bp_catch_throw
))
3253 /* pai: (temp) ADD fork/vfork here!! */
3256 /* Yes; add it to the list. */
3257 bs
= bpstat_alloc (ep
, bs
);
3262 #if defined(SOLIB_ADD)
3263 /* Also, for each triggered catchpoint, tag it with the name of
3264 the library that caused this trigger. (We copy the name now,
3265 because it's only guaranteed to be available NOW, when the
3266 catchpoint triggers. Clients who may wish to know the name
3267 later must get it from the catchpoint itself.) */
3268 if (ep
->triggered_dll_pathname
!= NULL
)
3269 xfree (ep
->triggered_dll_pathname
);
3270 if (ep
->type
== bp_catch_load
)
3271 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3272 PIDGET (inferior_ptid
));
3274 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3275 PIDGET (inferior_ptid
));
3277 dll_pathname
= NULL
;
3281 ep
->triggered_dll_pathname
= (char *)
3282 xmalloc (strlen (dll_pathname
) + 1);
3283 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3286 ep
->triggered_dll_pathname
= NULL
;
3292 /* Print B to gdb_stdout. */
3294 print_one_breakpoint (struct breakpoint
*b
,
3295 CORE_ADDR
*last_addr
)
3297 struct command_line
*l
;
3299 struct ep_type_description
3304 static struct ep_type_description bptypes
[] =
3306 {bp_none
, "?deleted?"},
3307 {bp_breakpoint
, "breakpoint"},
3308 {bp_hardware_breakpoint
, "hw breakpoint"},
3309 {bp_until
, "until"},
3310 {bp_finish
, "finish"},
3311 {bp_watchpoint
, "watchpoint"},
3312 {bp_hardware_watchpoint
, "hw watchpoint"},
3313 {bp_read_watchpoint
, "read watchpoint"},
3314 {bp_access_watchpoint
, "acc watchpoint"},
3315 {bp_longjmp
, "longjmp"},
3316 {bp_longjmp_resume
, "longjmp resume"},
3317 {bp_step_resume
, "step resume"},
3318 {bp_through_sigtramp
, "sigtramp"},
3319 {bp_watchpoint_scope
, "watchpoint scope"},
3320 {bp_call_dummy
, "call dummy"},
3321 {bp_shlib_event
, "shlib events"},
3322 {bp_thread_event
, "thread events"},
3323 {bp_overlay_event
, "overlay events"},
3324 {bp_catch_load
, "catch load"},
3325 {bp_catch_unload
, "catch unload"},
3326 {bp_catch_fork
, "catch fork"},
3327 {bp_catch_vfork
, "catch vfork"},
3328 {bp_catch_exec
, "catch exec"},
3329 {bp_catch_catch
, "catch catch"},
3330 {bp_catch_throw
, "catch throw"}
3333 static char *bpdisps
[] =
3334 {"del", "dstp", "dis", "keep"};
3335 static char bpenables
[] = "nynny";
3336 char wrap_indent
[80];
3337 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3338 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3339 struct cleanup
*bkpt_chain
;
3342 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3346 ui_out_field_int (uiout
, "number", b
->number
);
3350 if (((int) b
->type
> (sizeof (bptypes
) / sizeof (bptypes
[0])))
3351 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3352 internal_error (__FILE__
, __LINE__
,
3353 _("bptypes table does not describe type #%d."),
3355 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3359 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3363 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3364 ui_out_spaces (uiout
, 2);
3367 strcpy (wrap_indent
, " ");
3370 if (TARGET_ADDR_BIT
<= 32)
3371 strcat (wrap_indent
, " ");
3373 strcat (wrap_indent
, " ");
3376 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3377 b
->ops
->print_one (b
, last_addr
);
3382 internal_error (__FILE__
, __LINE__
,
3383 _("print_one_breakpoint: bp_none encountered\n"));
3387 case bp_hardware_watchpoint
:
3388 case bp_read_watchpoint
:
3389 case bp_access_watchpoint
:
3390 /* Field 4, the address, is omitted (which makes the columns
3391 not line up too nicely with the headers, but the effect
3392 is relatively readable). */
3394 ui_out_field_skip (uiout
, "addr");
3396 print_expression (b
->exp
, stb
->stream
);
3397 ui_out_field_stream (uiout
, "what", stb
);
3401 case bp_catch_unload
:
3402 /* Field 4, the address, is omitted (which makes the columns
3403 not line up too nicely with the headers, but the effect
3404 is relatively readable). */
3406 ui_out_field_skip (uiout
, "addr");
3408 if (b
->dll_pathname
== NULL
)
3410 ui_out_field_string (uiout
, "what", "<any library>");
3411 ui_out_spaces (uiout
, 1);
3415 ui_out_text (uiout
, "library \"");
3416 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3417 ui_out_text (uiout
, "\" ");
3422 case bp_catch_vfork
:
3423 /* Field 4, the address, is omitted (which makes the columns
3424 not line up too nicely with the headers, but the effect
3425 is relatively readable). */
3427 ui_out_field_skip (uiout
, "addr");
3429 if (b
->forked_inferior_pid
!= 0)
3431 ui_out_text (uiout
, "process ");
3432 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3433 ui_out_spaces (uiout
, 1);
3437 /* Field 4, the address, is omitted (which makes the columns
3438 not line up too nicely with the headers, but the effect
3439 is relatively readable). */
3441 ui_out_field_skip (uiout
, "addr");
3443 if (b
->exec_pathname
!= NULL
)
3445 ui_out_text (uiout
, "program \"");
3446 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3447 ui_out_text (uiout
, "\" ");
3451 case bp_catch_catch
:
3452 /* Field 4, the address, is omitted (which makes the columns
3453 not line up too nicely with the headers, but the effect
3454 is relatively readable). */
3456 ui_out_field_skip (uiout
, "addr");
3458 ui_out_field_string (uiout
, "what", "exception catch");
3459 ui_out_spaces (uiout
, 1);
3462 case bp_catch_throw
:
3463 /* Field 4, the address, is omitted (which makes the columns
3464 not line up too nicely with the headers, but the effect
3465 is relatively readable). */
3467 ui_out_field_skip (uiout
, "addr");
3469 ui_out_field_string (uiout
, "what", "exception throw");
3470 ui_out_spaces (uiout
, 1);
3474 case bp_hardware_breakpoint
:
3478 case bp_longjmp_resume
:
3479 case bp_step_resume
:
3480 case bp_through_sigtramp
:
3481 case bp_watchpoint_scope
:
3483 case bp_shlib_event
:
3484 case bp_thread_event
:
3485 case bp_overlay_event
:
3490 ui_out_field_string (uiout
, "addr", "<PENDING>");
3492 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
3495 *last_addr
= b
->loc
->address
;
3498 sym
= find_pc_sect_function (b
->loc
->address
, b
->loc
->section
);
3501 ui_out_text (uiout
, "in ");
3502 ui_out_field_string (uiout
, "func",
3503 SYMBOL_PRINT_NAME (sym
));
3504 ui_out_wrap_hint (uiout
, wrap_indent
);
3505 ui_out_text (uiout
, " at ");
3507 ui_out_field_string (uiout
, "file", b
->source_file
);
3508 ui_out_text (uiout
, ":");
3509 ui_out_field_int (uiout
, "line", b
->line_number
);
3511 else if (b
->pending
)
3513 ui_out_field_string (uiout
, "pending", b
->addr_string
);
3517 print_address_symbolic (b
->loc
->address
, stb
->stream
, demangle
, "");
3518 ui_out_field_stream (uiout
, "at", stb
);
3523 if (b
->thread
!= -1)
3525 /* FIXME: This seems to be redundant and lost here; see the
3526 "stop only in" line a little further down. */
3527 ui_out_text (uiout
, " thread ");
3528 ui_out_field_int (uiout
, "thread", b
->thread
);
3531 ui_out_text (uiout
, "\n");
3533 if (frame_id_p (b
->frame_id
))
3536 ui_out_text (uiout
, "\tstop only in stack frame at ");
3537 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3539 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3540 ui_out_text (uiout
, "\n");
3546 ui_out_text (uiout
, "\tstop only if ");
3547 print_expression (b
->cond
, stb
->stream
);
3548 ui_out_field_stream (uiout
, "cond", stb
);
3549 ui_out_text (uiout
, "\n");
3552 if (b
->pending
&& b
->cond_string
)
3555 ui_out_text (uiout
, "\tstop only if ");
3556 ui_out_field_string (uiout
, "cond", b
->cond_string
);
3557 ui_out_text (uiout
, "\n");
3560 if (b
->thread
!= -1)
3562 /* FIXME should make an annotation for this */
3563 ui_out_text (uiout
, "\tstop only in thread ");
3564 ui_out_field_int (uiout
, "thread", b
->thread
);
3565 ui_out_text (uiout
, "\n");
3568 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3570 /* FIXME should make an annotation for this */
3571 if (ep_is_catchpoint (b
))
3572 ui_out_text (uiout
, "\tcatchpoint");
3574 ui_out_text (uiout
, "\tbreakpoint");
3575 ui_out_text (uiout
, " already hit ");
3576 ui_out_field_int (uiout
, "times", b
->hit_count
);
3577 if (b
->hit_count
== 1)
3578 ui_out_text (uiout
, " time\n");
3580 ui_out_text (uiout
, " times\n");
3583 /* Output the count also if it is zero, but only if this is
3584 mi. FIXME: Should have a better test for this. */
3585 if (ui_out_is_mi_like_p (uiout
))
3586 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3587 ui_out_field_int (uiout
, "times", b
->hit_count
);
3589 if (b
->ignore_count
)
3592 ui_out_text (uiout
, "\tignore next ");
3593 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3594 ui_out_text (uiout
, " hits\n");
3597 if ((l
= b
->commands
))
3599 struct cleanup
*script_chain
;
3602 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3603 print_command_lines (uiout
, l
, 4);
3604 do_cleanups (script_chain
);
3606 do_cleanups (bkpt_chain
);
3607 do_cleanups (old_chain
);
3610 struct captured_breakpoint_query_args
3616 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3618 struct captured_breakpoint_query_args
*args
= data
;
3619 struct breakpoint
*b
;
3620 CORE_ADDR dummy_addr
= 0;
3623 if (args
->bnum
== b
->number
)
3625 print_one_breakpoint (b
, &dummy_addr
);
3633 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
, char **error_message
)
3635 struct captured_breakpoint_query_args args
;
3637 /* For the moment we don't trust print_one_breakpoint() to not throw
3639 return catch_exceptions_with_msg (uiout
, do_captured_breakpoint_query
, &args
,
3640 error_message
, RETURN_MASK_ALL
);
3643 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3644 catchpoints, et.al.). */
3647 user_settable_breakpoint (const struct breakpoint
*b
)
3649 return (b
->type
== bp_breakpoint
3650 || b
->type
== bp_catch_load
3651 || b
->type
== bp_catch_unload
3652 || b
->type
== bp_catch_fork
3653 || b
->type
== bp_catch_vfork
3654 || b
->type
== bp_catch_exec
3655 || b
->type
== bp_catch_catch
3656 || b
->type
== bp_catch_throw
3657 || b
->type
== bp_hardware_breakpoint
3658 || b
->type
== bp_watchpoint
3659 || b
->type
== bp_read_watchpoint
3660 || b
->type
== bp_access_watchpoint
3661 || b
->type
== bp_hardware_watchpoint
);
3664 /* Print information on user settable breakpoint (watchpoint, etc)
3665 number BNUM. If BNUM is -1 print all user settable breakpoints.
3666 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3669 breakpoint_1 (int bnum
, int allflag
)
3671 struct breakpoint
*b
;
3672 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3673 int nr_printable_breakpoints
;
3674 struct cleanup
*bkpttbl_chain
;
3676 /* Compute the number of rows in the table. */
3677 nr_printable_breakpoints
= 0;
3680 || bnum
== b
->number
)
3682 if (allflag
|| user_settable_breakpoint (b
))
3683 nr_printable_breakpoints
++;
3688 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3692 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3695 if (nr_printable_breakpoints
> 0)
3696 annotate_breakpoints_headers ();
3697 if (nr_printable_breakpoints
> 0)
3699 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3700 if (nr_printable_breakpoints
> 0)
3702 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3703 if (nr_printable_breakpoints
> 0)
3705 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3706 if (nr_printable_breakpoints
> 0)
3708 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3711 if (nr_printable_breakpoints
> 0)
3713 if (TARGET_ADDR_BIT
<= 32)
3714 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3716 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3718 if (nr_printable_breakpoints
> 0)
3720 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3721 ui_out_table_body (uiout
);
3722 if (nr_printable_breakpoints
> 0)
3723 annotate_breakpoints_table ();
3727 || bnum
== b
->number
)
3729 /* We only print out user settable breakpoints unless the
3731 if (allflag
|| user_settable_breakpoint (b
))
3732 print_one_breakpoint (b
, &last_addr
);
3735 do_cleanups (bkpttbl_chain
);
3737 if (nr_printable_breakpoints
== 0)
3740 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3742 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3747 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3748 that a comparison of an unsigned with -1 is always false. */
3749 if (last_addr
!= (CORE_ADDR
) -1)
3750 set_next_address (last_addr
);
3753 /* FIXME? Should this be moved up so that it is only called when
3754 there have been breakpoints? */
3755 annotate_breakpoints_table_end ();
3759 breakpoints_info (char *bnum_exp
, int from_tty
)
3764 bnum
= parse_and_eval_long (bnum_exp
);
3766 breakpoint_1 (bnum
, 0);
3770 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3775 bnum
= parse_and_eval_long (bnum_exp
);
3777 breakpoint_1 (bnum
, 1);
3780 /* Print a message describing any breakpoints set at PC. */
3783 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
)
3786 struct breakpoint
*b
;
3789 if (b
->loc
->address
== pc
) /* address match / overlay match */
3790 if (!b
->pending
&& (!overlay_debugging
|| b
->loc
->section
== section
))
3795 printf_filtered (_("Note: breakpoint "));
3796 else /* if (others == ???) */
3797 printf_filtered (_("Note: breakpoints "));
3799 if (b
->loc
->address
== pc
) /* address match / overlay match */
3800 if (!b
->pending
&& (!overlay_debugging
|| b
->loc
->section
== section
))
3803 printf_filtered ("%d%s%s ",
3805 ((b
->enable_state
== bp_disabled
||
3806 b
->enable_state
== bp_shlib_disabled
||
3807 b
->enable_state
== bp_call_disabled
)
3809 : b
->enable_state
== bp_permanent
3813 : ((others
== 1) ? " and" : ""));
3815 printf_filtered (_("also set at pc "));
3816 deprecated_print_address_numeric (pc
, 1, gdb_stdout
);
3817 printf_filtered (".\n");
3821 /* Set the default place to put a breakpoint
3822 for the `break' command with no arguments. */
3825 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3828 default_breakpoint_valid
= valid
;
3829 default_breakpoint_address
= addr
;
3830 default_breakpoint_symtab
= symtab
;
3831 default_breakpoint_line
= line
;
3834 /* Return true iff it is meaningful to use the address member of
3835 BPT. For some breakpoint types, the address member is irrelevant
3836 and it makes no sense to attempt to compare it to other addresses
3837 (or use it for any other purpose either).
3839 More specifically, each of the following breakpoint types will always
3840 have a zero valued address and we don't want check_duplicates() to mark
3841 breakpoints of any of these types to be a duplicate of an actual
3842 breakpoint at address zero:
3845 bp_hardware_watchpoint
3847 bp_access_watchpoint
3854 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3856 enum bptype type
= bpt
->type
;
3858 return (type
!= bp_watchpoint
3859 && type
!= bp_hardware_watchpoint
3860 && type
!= bp_read_watchpoint
3861 && type
!= bp_access_watchpoint
3862 && type
!= bp_catch_exec
3863 && type
!= bp_longjmp_resume
3864 && type
!= bp_catch_fork
3865 && type
!= bp_catch_vfork
);
3868 /* Rescan breakpoints at the same address and section as BPT,
3869 marking the first one as "first" and any others as "duplicates".
3870 This is so that the bpt instruction is only inserted once.
3871 If we have a permanent breakpoint at the same place as BPT, make
3872 that one the official one, and the rest as duplicates. */
3875 check_duplicates (struct breakpoint
*bpt
)
3877 struct bp_location
*b
;
3879 struct bp_location
*perm_bp
= 0;
3880 CORE_ADDR address
= bpt
->loc
->address
;
3881 asection
*section
= bpt
->loc
->section
;
3883 if (! breakpoint_address_is_meaningful (bpt
))
3886 ALL_BP_LOCATIONS (b
)
3887 if (b
->owner
->enable_state
!= bp_disabled
3888 && b
->owner
->enable_state
!= bp_shlib_disabled
3889 && !b
->owner
->pending
3890 && b
->owner
->enable_state
!= bp_call_disabled
3891 && b
->address
== address
/* address / overlay match */
3892 && (!overlay_debugging
|| b
->section
== section
)
3893 && breakpoint_address_is_meaningful (b
->owner
))
3895 /* Have we found a permanent breakpoint? */
3896 if (b
->owner
->enable_state
== bp_permanent
)
3903 b
->duplicate
= count
> 1;
3906 /* If we found a permanent breakpoint at this address, go over the
3907 list again and declare all the other breakpoints there to be the
3911 perm_bp
->duplicate
= 0;
3913 /* Permanent breakpoint should always be inserted. */
3914 if (! perm_bp
->inserted
)
3915 internal_error (__FILE__
, __LINE__
,
3916 _("allegedly permanent breakpoint is not "
3917 "actually inserted"));
3919 ALL_BP_LOCATIONS (b
)
3922 if (b
->owner
->enable_state
!= bp_disabled
3923 && b
->owner
->enable_state
!= bp_shlib_disabled
3924 && !b
->owner
->pending
3925 && b
->owner
->enable_state
!= bp_call_disabled
3926 && b
->address
== address
/* address / overlay match */
3927 && (!overlay_debugging
|| b
->section
== section
)
3928 && breakpoint_address_is_meaningful (b
->owner
))
3931 internal_error (__FILE__
, __LINE__
,
3932 _("another breakpoint was inserted on top of "
3933 "a permanent breakpoint"));
3942 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
3943 int bnum
, int have_bnum
)
3948 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
3949 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
3951 warning (_("Breakpoint %d address previously adjusted from %s to %s."),
3952 bnum
, astr1
, astr2
);
3954 warning (_("Breakpoint address adjusted from %s to %s."), astr1
, astr2
);
3957 /* Adjust a breakpoint's address to account for architectural constraints
3958 on breakpoint placement. Return the adjusted address. Note: Very
3959 few targets require this kind of adjustment. For most targets,
3960 this function is simply the identity function. */
3963 adjust_breakpoint_address (CORE_ADDR bpaddr
, enum bptype bptype
)
3965 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
3967 /* Very few targets need any kind of breakpoint adjustment. */
3970 else if (bptype
== bp_watchpoint
3971 || bptype
== bp_hardware_watchpoint
3972 || bptype
== bp_read_watchpoint
3973 || bptype
== bp_access_watchpoint
3974 || bptype
== bp_catch_fork
3975 || bptype
== bp_catch_vfork
3976 || bptype
== bp_catch_exec
)
3978 /* Watchpoints and the various bp_catch_* eventpoints should not
3979 have their addresses modified. */
3984 CORE_ADDR adjusted_bpaddr
;
3986 /* Some targets have architectural constraints on the placement
3987 of breakpoint instructions. Obtain the adjusted address. */
3988 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
3991 /* An adjusted breakpoint address can significantly alter
3992 a user's expectations. Print a warning if an adjustment
3994 if (adjusted_bpaddr
!= bpaddr
)
3995 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
3997 return adjusted_bpaddr
;
4001 /* Allocate a struct bp_location. */
4003 static struct bp_location
*
4004 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
)
4006 struct bp_location
*loc
, *loc_p
;
4008 loc
= xmalloc (sizeof (struct bp_location
));
4009 memset (loc
, 0, sizeof (*loc
));
4019 case bp_longjmp_resume
:
4020 case bp_step_resume
:
4021 case bp_through_sigtramp
:
4022 case bp_watchpoint_scope
:
4024 case bp_shlib_event
:
4025 case bp_thread_event
:
4026 case bp_overlay_event
:
4028 case bp_catch_unload
:
4029 loc
->loc_type
= bp_loc_software_breakpoint
;
4031 case bp_hardware_breakpoint
:
4032 loc
->loc_type
= bp_loc_hardware_breakpoint
;
4034 case bp_hardware_watchpoint
:
4035 case bp_read_watchpoint
:
4036 case bp_access_watchpoint
:
4037 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4041 case bp_catch_vfork
:
4043 case bp_catch_catch
:
4044 case bp_catch_throw
:
4045 loc
->loc_type
= bp_loc_other
;
4048 internal_error (__FILE__
, __LINE__
, _("unknown breakpoint type"));
4051 /* Add this breakpoint to the end of the chain. */
4053 loc_p
= bp_location_chain
;
4055 bp_location_chain
= loc
;
4059 loc_p
= loc_p
->next
;
4066 /* set_raw_breakpoint() is a low level routine for allocating and
4067 partially initializing a breakpoint of type BPTYPE. The newly
4068 created breakpoint's address, section, source file name, and line
4069 number are provided by SAL. The newly created and partially
4070 initialized breakpoint is added to the breakpoint chain and
4071 is also returned as the value of this function.
4073 It is expected that the caller will complete the initialization of
4074 the newly created breakpoint struct as well as output any status
4075 information regarding the creation of a new breakpoint. In
4076 particular, set_raw_breakpoint() does NOT set the breakpoint
4077 number! Care should be taken to not allow an error() to occur
4078 prior to completing the initialization of the breakpoint. If this
4079 should happen, a bogus breakpoint will be left on the chain. */
4082 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4084 struct breakpoint
*b
, *b1
;
4086 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4087 memset (b
, 0, sizeof (*b
));
4088 b
->loc
= allocate_bp_location (b
, bptype
);
4089 b
->loc
->requested_address
= sal
.pc
;
4090 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
,
4092 if (sal
.symtab
== NULL
)
4093 b
->source_file
= NULL
;
4095 b
->source_file
= savestring (sal
.symtab
->filename
,
4096 strlen (sal
.symtab
->filename
));
4097 b
->loc
->section
= sal
.section
;
4099 b
->language
= current_language
->la_language
;
4100 b
->input_radix
= input_radix
;
4102 b
->line_number
= sal
.line
;
4103 b
->enable_state
= bp_enabled
;
4106 b
->ignore_count
= 0;
4108 b
->frame_id
= null_frame_id
;
4109 b
->dll_pathname
= NULL
;
4110 b
->triggered_dll_pathname
= NULL
;
4111 b
->forked_inferior_pid
= 0;
4112 b
->exec_pathname
= NULL
;
4116 /* Add this breakpoint to the end of the chain
4117 so that a list of breakpoints will come out in order
4118 of increasing numbers. */
4120 b1
= breakpoint_chain
;
4122 breakpoint_chain
= b
;
4130 check_duplicates (b
);
4131 breakpoints_changed ();
4137 /* Note that the breakpoint object B describes a permanent breakpoint
4138 instruction, hard-wired into the inferior's code. */
4140 make_breakpoint_permanent (struct breakpoint
*b
)
4142 b
->enable_state
= bp_permanent
;
4144 /* By definition, permanent breakpoints are already present in the code. */
4145 b
->loc
->inserted
= 1;
4148 static struct breakpoint
*
4149 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4151 static int internal_breakpoint_number
= -1;
4152 struct symtab_and_line sal
;
4153 struct breakpoint
*b
;
4155 init_sal (&sal
); /* initialize to zeroes */
4158 sal
.section
= find_pc_overlay (sal
.pc
);
4160 b
= set_raw_breakpoint (sal
, type
);
4161 b
->number
= internal_breakpoint_number
--;
4162 b
->disposition
= disp_donttouch
;
4169 create_longjmp_breakpoint (char *func_name
)
4171 struct breakpoint
*b
;
4172 struct minimal_symbol
*m
;
4174 if (func_name
== NULL
)
4175 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
4178 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4181 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4184 b
->enable_state
= bp_disabled
;
4187 b
->addr_string
= xstrdup (func_name
);
4190 /* Call this routine when stepping and nexting to enable a breakpoint
4191 if we do a longjmp(). When we hit that breakpoint, call
4192 set_longjmp_resume_breakpoint() to figure out where we are going. */
4195 enable_longjmp_breakpoint (void)
4197 struct breakpoint
*b
;
4200 if (b
->type
== bp_longjmp
)
4202 b
->enable_state
= bp_enabled
;
4203 check_duplicates (b
);
4208 disable_longjmp_breakpoint (void)
4210 struct breakpoint
*b
;
4213 if (b
->type
== bp_longjmp
4214 || b
->type
== bp_longjmp_resume
)
4216 b
->enable_state
= bp_disabled
;
4217 check_duplicates (b
);
4222 create_overlay_event_breakpoint (char *func_name
)
4224 struct breakpoint
*b
;
4225 struct minimal_symbol
*m
;
4227 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4230 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4232 b
->addr_string
= xstrdup (func_name
);
4234 if (overlay_debugging
== ovly_auto
)
4236 b
->enable_state
= bp_enabled
;
4237 overlay_events_enabled
= 1;
4241 b
->enable_state
= bp_disabled
;
4242 overlay_events_enabled
= 0;
4247 enable_overlay_breakpoints (void)
4249 struct breakpoint
*b
;
4252 if (b
->type
== bp_overlay_event
)
4254 b
->enable_state
= bp_enabled
;
4255 check_duplicates (b
);
4256 overlay_events_enabled
= 1;
4261 disable_overlay_breakpoints (void)
4263 struct breakpoint
*b
;
4266 if (b
->type
== bp_overlay_event
)
4268 b
->enable_state
= bp_disabled
;
4269 check_duplicates (b
);
4270 overlay_events_enabled
= 0;
4275 create_thread_event_breakpoint (CORE_ADDR address
)
4277 struct breakpoint
*b
;
4279 b
= create_internal_breakpoint (address
, bp_thread_event
);
4281 b
->enable_state
= bp_enabled
;
4282 /* addr_string has to be used or breakpoint_re_set will delete me. */
4283 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4289 remove_thread_event_breakpoints (void)
4291 struct breakpoint
*b
, *temp
;
4293 ALL_BREAKPOINTS_SAFE (b
, temp
)
4294 if (b
->type
== bp_thread_event
)
4295 delete_breakpoint (b
);
4298 struct captured_parse_breakpoint_args
4301 struct symtabs_and_lines
*sals_p
;
4302 char ***addr_string_p
;
4306 struct lang_and_radix
4312 /* Cleanup helper routine to restore the current language and
4315 do_restore_lang_radix_cleanup (void *old
)
4317 struct lang_and_radix
*p
= old
;
4318 set_language (p
->lang
);
4319 input_radix
= p
->radix
;
4322 /* Try and resolve a pending breakpoint. */
4324 resolve_pending_breakpoint (struct breakpoint
*b
)
4326 /* Try and reparse the breakpoint in case the shared library
4328 struct symtabs_and_lines sals
;
4329 struct symtab_and_line pending_sal
;
4330 char **cond_string
= (char **) NULL
;
4331 char *copy_arg
= b
->addr_string
;
4336 struct ui_file
*old_gdb_stderr
;
4337 struct lang_and_radix old_lr
;
4338 struct cleanup
*old_chain
;
4340 /* Set language, input-radix, then reissue breakpoint command.
4341 Ensure the language and input-radix are restored afterwards. */
4342 old_lr
.lang
= current_language
->la_language
;
4343 old_lr
.radix
= input_radix
;
4344 old_chain
= make_cleanup (do_restore_lang_radix_cleanup
, &old_lr
);
4346 set_language (b
->language
);
4347 input_radix
= b
->input_radix
;
4348 rc
= break_command_1 (b
->addr_string
, b
->flag
, b
->from_tty
, b
);
4350 if (rc
== GDB_RC_OK
)
4351 /* Pending breakpoint has been resolved. */
4352 printf_filtered (_("Pending breakpoint \"%s\" resolved\n"), b
->addr_string
);
4354 do_cleanups (old_chain
);
4359 remove_solib_event_breakpoints (void)
4361 struct breakpoint
*b
, *temp
;
4363 ALL_BREAKPOINTS_SAFE (b
, temp
)
4364 if (b
->type
== bp_shlib_event
)
4365 delete_breakpoint (b
);
4369 create_solib_event_breakpoint (CORE_ADDR address
)
4371 struct breakpoint
*b
;
4373 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4377 /* Disable any breakpoints that are on code in shared libraries. Only
4378 apply to enabled breakpoints, disabled ones can just stay disabled. */
4381 disable_breakpoints_in_shlibs (int silent
)
4383 struct breakpoint
*b
;
4384 int disabled_shlib_breaks
= 0;
4386 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4389 if (((b
->type
== bp_breakpoint
) || (b
->type
== bp_hardware_breakpoint
))
4390 && breakpoint_enabled (b
) && !b
->loc
->duplicate
4392 && PC_SOLIB (b
->loc
->address
)
4394 && solib_address (b
->loc
->address
)
4398 b
->enable_state
= bp_shlib_disabled
;
4401 if (!disabled_shlib_breaks
)
4403 target_terminal_ours_for_output ();
4404 warning (_("Temporarily disabling shared library breakpoints:"));
4406 disabled_shlib_breaks
= 1;
4407 warning (_("breakpoint #%d "), b
->number
);
4413 /* Disable any breakpoints that are in in an unloaded shared library. Only
4414 apply to enabled breakpoints, disabled ones can just stay disabled. */
4417 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
4419 struct breakpoint
*b
;
4420 int disabled_shlib_breaks
= 0;
4422 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4425 if ((b
->loc
->loc_type
== bp_loc_hardware_breakpoint
4426 || b
->loc
->loc_type
== bp_loc_software_breakpoint
)
4427 && breakpoint_enabled (b
) && !b
->loc
->duplicate
)
4430 char *so_name
= PC_SOLIB (b
->loc
->address
);
4432 char *so_name
= solib_address (b
->loc
->address
);
4434 if (so_name
&& !strcmp (so_name
, solib
->so_name
))
4436 b
->enable_state
= bp_shlib_disabled
;
4437 /* At this point, we cannot rely on remove_breakpoint
4438 succeeding so we must mark the breakpoint as not inserted
4439 to prevent future errors occurring in remove_breakpoints. */
4440 b
->loc
->inserted
= 0;
4441 if (!disabled_shlib_breaks
)
4443 target_terminal_ours_for_output ();
4444 warning (_("Temporarily disabling breakpoints for unloaded shared library \"%s\""),
4447 disabled_shlib_breaks
= 1;
4453 /* Try to reenable any breakpoints in shared libraries. */
4455 re_enable_breakpoints_in_shlibs (void)
4457 struct breakpoint
*b
, *tmp
;
4459 ALL_BREAKPOINTS_SAFE (b
, tmp
)
4461 if (b
->enable_state
== bp_shlib_disabled
)
4466 /* Do not reenable the breakpoint if the shared library is
4467 still not mapped in. */
4469 lib
= PC_SOLIB (b
->loc
->address
);
4471 lib
= solib_address (b
->loc
->address
);
4473 if (lib
!= NULL
&& target_read_memory (b
->loc
->address
, buf
, 1) == 0)
4474 b
->enable_state
= bp_enabled
;
4476 else if (b
->pending
&& (b
->enable_state
== bp_enabled
))
4478 if (resolve_pending_breakpoint (b
) == GDB_RC_OK
)
4479 delete_breakpoint (b
);
4485 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
4486 char *cond_string
, enum bptype bp_kind
)
4488 struct breakpoint
*b
;
4489 struct symtabs_and_lines sals
;
4490 struct cleanup
*old_chain
;
4491 struct cleanup
*canonical_strings_chain
= NULL
;
4492 char *addr_start
= hookname
;
4493 char *addr_end
= NULL
;
4494 char **canonical
= (char **) NULL
;
4495 int thread
= -1; /* All threads. */
4497 /* Set a breakpoint on the specified hook. */
4498 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
,
4499 0, &canonical
, NULL
);
4500 addr_end
= hookname
;
4502 if (sals
.nelts
== 0)
4504 warning (_("Unable to set a breakpoint on dynamic linker callback.\n"
4505 "Suggest linking with /opt/langtools/lib/end.o.\n"
4506 "GDB will be unable to track shl_load/shl_unload calls."));
4509 if (sals
.nelts
!= 1)
4511 warning (_("Unable to set unique breakpoint on dynamic linker callback.\n"
4512 "GDB will be unable to track shl_load/shl_unload calls."));
4516 /* Make sure that all storage allocated in decode_line_1 gets freed
4517 in case the following errors out. */
4518 old_chain
= make_cleanup (xfree
, sals
.sals
);
4519 if (canonical
!= (char **) NULL
)
4521 make_cleanup (xfree
, canonical
);
4522 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
4523 if (canonical
[0] != NULL
)
4524 make_cleanup (xfree
, canonical
[0]);
4527 resolve_sal_pc (&sals
.sals
[0]);
4529 /* Remove the canonical strings from the cleanup, they are needed below. */
4530 if (canonical
!= (char **) NULL
)
4531 discard_cleanups (canonical_strings_chain
);
4533 b
= set_raw_breakpoint (sals
.sals
[0], bp_kind
);
4534 set_breakpoint_count (breakpoint_count
+ 1);
4535 b
->number
= breakpoint_count
;
4537 b
->cond_string
= (cond_string
== NULL
) ?
4538 NULL
: savestring (cond_string
, strlen (cond_string
));
4541 if (canonical
!= (char **) NULL
&& canonical
[0] != NULL
)
4542 b
->addr_string
= canonical
[0];
4543 else if (addr_start
)
4544 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
4546 b
->enable_state
= bp_enabled
;
4547 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4549 if (dll_pathname
== NULL
)
4550 b
->dll_pathname
= NULL
;
4553 b
->dll_pathname
= (char *) xmalloc (strlen (dll_pathname
) + 1);
4554 strcpy (b
->dll_pathname
, dll_pathname
);
4558 do_cleanups (old_chain
);
4562 create_solib_load_event_breakpoint (char *hookname
, int tempflag
,
4563 char *dll_pathname
, char *cond_string
)
4565 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4566 cond_string
, bp_catch_load
);
4570 create_solib_unload_event_breakpoint (char *hookname
, int tempflag
,
4571 char *dll_pathname
, char *cond_string
)
4573 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4574 cond_string
, bp_catch_unload
);
4578 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4579 enum bptype bp_kind
)
4581 struct symtab_and_line sal
;
4582 struct breakpoint
*b
;
4583 int thread
= -1; /* All threads. */
4590 b
= set_raw_breakpoint (sal
, bp_kind
);
4591 set_breakpoint_count (breakpoint_count
+ 1);
4592 b
->number
= breakpoint_count
;
4594 b
->cond_string
= (cond_string
== NULL
) ?
4595 NULL
: savestring (cond_string
, strlen (cond_string
));
4597 b
->addr_string
= NULL
;
4598 b
->enable_state
= bp_enabled
;
4599 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4600 b
->forked_inferior_pid
= 0;
4606 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4608 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4612 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4614 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4618 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4620 struct symtab_and_line sal
;
4621 struct breakpoint
*b
;
4622 int thread
= -1; /* All threads. */
4629 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4630 set_breakpoint_count (breakpoint_count
+ 1);
4631 b
->number
= breakpoint_count
;
4633 b
->cond_string
= (cond_string
== NULL
) ?
4634 NULL
: savestring (cond_string
, strlen (cond_string
));
4636 b
->addr_string
= NULL
;
4637 b
->enable_state
= bp_enabled
;
4638 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4644 hw_breakpoint_used_count (void)
4646 struct breakpoint
*b
;
4651 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4659 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4661 struct breakpoint
*b
;
4664 *other_type_used
= 0;
4667 if (breakpoint_enabled (b
))
4669 if (b
->type
== type
)
4671 else if ((b
->type
== bp_hardware_watchpoint
||
4672 b
->type
== bp_read_watchpoint
||
4673 b
->type
== bp_access_watchpoint
))
4674 *other_type_used
= 1;
4680 /* Call this after hitting the longjmp() breakpoint. Use this to set
4681 a new breakpoint at the target of the jmp_buf.
4683 FIXME - This ought to be done by setting a temporary breakpoint
4684 that gets deleted automatically... */
4687 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_id frame_id
)
4689 struct breakpoint
*b
;
4692 if (b
->type
== bp_longjmp_resume
)
4694 b
->loc
->requested_address
= pc
;
4695 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
,
4697 b
->enable_state
= bp_enabled
;
4698 b
->frame_id
= frame_id
;
4699 check_duplicates (b
);
4705 disable_watchpoints_before_interactive_call_start (void)
4707 struct breakpoint
*b
;
4711 if (((b
->type
== bp_watchpoint
)
4712 || (b
->type
== bp_hardware_watchpoint
)
4713 || (b
->type
== bp_read_watchpoint
)
4714 || (b
->type
== bp_access_watchpoint
)
4715 || ep_is_exception_catchpoint (b
))
4716 && breakpoint_enabled (b
))
4718 b
->enable_state
= bp_call_disabled
;
4719 check_duplicates (b
);
4725 enable_watchpoints_after_interactive_call_stop (void)
4727 struct breakpoint
*b
;
4731 if (((b
->type
== bp_watchpoint
)
4732 || (b
->type
== bp_hardware_watchpoint
)
4733 || (b
->type
== bp_read_watchpoint
)
4734 || (b
->type
== bp_access_watchpoint
)
4735 || ep_is_exception_catchpoint (b
))
4736 && (b
->enable_state
== bp_call_disabled
))
4738 b
->enable_state
= bp_enabled
;
4739 check_duplicates (b
);
4745 /* Set a breakpoint that will evaporate an end of command
4746 at address specified by SAL.
4747 Restrict it to frame FRAME if FRAME is nonzero. */
4750 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4753 struct breakpoint
*b
;
4754 b
= set_raw_breakpoint (sal
, type
);
4755 b
->enable_state
= bp_enabled
;
4756 b
->disposition
= disp_donttouch
;
4757 b
->frame_id
= frame_id
;
4759 /* If we're debugging a multi-threaded program, then we
4760 want momentary breakpoints to be active in only a
4761 single thread of control. */
4762 if (in_thread_list (inferior_ptid
))
4763 b
->thread
= pid_to_thread_id (inferior_ptid
);
4769 /* Tell the user we have just set a breakpoint B. */
4772 mention (struct breakpoint
*b
)
4775 struct cleanup
*old_chain
, *ui_out_chain
;
4776 struct ui_stream
*stb
;
4778 stb
= ui_out_stream_new (uiout
);
4779 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4781 /* FIXME: This is misplaced; mention() is called by things (like
4782 hitting a watchpoint) other than breakpoint creation. It should
4783 be possible to clean this up and at the same time replace the
4784 random calls to breakpoint_changed with this hook, as has already
4785 been done for deprecated_delete_breakpoint_hook and so on. */
4786 if (deprecated_create_breakpoint_hook
)
4787 deprecated_create_breakpoint_hook (b
);
4788 breakpoint_create_event (b
->number
);
4790 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4791 b
->ops
->print_mention (b
);
4796 printf_filtered (_("(apparently deleted?) Eventpoint %d: "), b
->number
);
4799 ui_out_text (uiout
, "Watchpoint ");
4800 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4801 ui_out_field_int (uiout
, "number", b
->number
);
4802 ui_out_text (uiout
, ": ");
4803 print_expression (b
->exp
, stb
->stream
);
4804 ui_out_field_stream (uiout
, "exp", stb
);
4805 do_cleanups (ui_out_chain
);
4807 case bp_hardware_watchpoint
:
4808 ui_out_text (uiout
, "Hardware watchpoint ");
4809 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4810 ui_out_field_int (uiout
, "number", b
->number
);
4811 ui_out_text (uiout
, ": ");
4812 print_expression (b
->exp
, stb
->stream
);
4813 ui_out_field_stream (uiout
, "exp", stb
);
4814 do_cleanups (ui_out_chain
);
4816 case bp_read_watchpoint
:
4817 ui_out_text (uiout
, "Hardware read watchpoint ");
4818 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4819 ui_out_field_int (uiout
, "number", b
->number
);
4820 ui_out_text (uiout
, ": ");
4821 print_expression (b
->exp
, stb
->stream
);
4822 ui_out_field_stream (uiout
, "exp", stb
);
4823 do_cleanups (ui_out_chain
);
4825 case bp_access_watchpoint
:
4826 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4827 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4828 ui_out_field_int (uiout
, "number", b
->number
);
4829 ui_out_text (uiout
, ": ");
4830 print_expression (b
->exp
, stb
->stream
);
4831 ui_out_field_stream (uiout
, "exp", stb
);
4832 do_cleanups (ui_out_chain
);
4835 if (ui_out_is_mi_like_p (uiout
))
4840 printf_filtered (_("Breakpoint %d"), b
->number
);
4843 case bp_hardware_breakpoint
:
4844 if (ui_out_is_mi_like_p (uiout
))
4849 printf_filtered (_("Hardware assisted breakpoint %d"), b
->number
);
4853 case bp_catch_unload
:
4854 printf_filtered (_("Catchpoint %d (%s %s)"),
4856 (b
->type
== bp_catch_load
) ? "load" : "unload",
4857 (b
->dll_pathname
!= NULL
) ?
4858 b
->dll_pathname
: "<any library>");
4861 case bp_catch_vfork
:
4862 printf_filtered (_("Catchpoint %d (%s)"),
4864 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4867 printf_filtered (_("Catchpoint %d (exec)"),
4870 case bp_catch_catch
:
4871 case bp_catch_throw
:
4872 printf_filtered (_("Catchpoint %d (%s)"),
4874 (b
->type
== bp_catch_catch
) ? "catch" : "throw");
4880 case bp_longjmp_resume
:
4881 case bp_step_resume
:
4882 case bp_through_sigtramp
:
4884 case bp_watchpoint_scope
:
4885 case bp_shlib_event
:
4886 case bp_thread_event
:
4887 case bp_overlay_event
:
4893 /* i18n: cagney/2005-02-11: Below needs to be merged into a
4897 printf_filtered (_(" (%s) pending."), b
->addr_string
);
4901 if (addressprint
|| b
->source_file
== NULL
)
4903 printf_filtered (" at ");
4904 deprecated_print_address_numeric (b
->loc
->address
, 1, gdb_stdout
);
4907 printf_filtered (": file %s, line %d.",
4908 b
->source_file
, b
->line_number
);
4911 do_cleanups (old_chain
);
4912 if (ui_out_is_mi_like_p (uiout
))
4914 printf_filtered ("\n");
4918 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4919 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4920 COND[i] and COND_STRING[i] values.
4922 The parameter PENDING_BP points to a pending breakpoint that is
4923 the basis of the breakpoints currently being created. The pending
4924 breakpoint may contain a separate condition string or commands
4925 that were added after the initial pending breakpoint was created.
4927 NOTE: If the function succeeds, the caller is expected to cleanup
4928 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4929 array contents). If the function fails (error() is called), the
4930 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4931 COND and SALS arrays and each of those arrays contents. */
4934 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
4935 struct expression
**cond
, char **cond_string
,
4936 enum bptype type
, enum bpdisp disposition
,
4937 int thread
, int ignore_count
, int from_tty
,
4938 struct breakpoint
*pending_bp
)
4940 if (type
== bp_hardware_breakpoint
)
4942 int i
= hw_breakpoint_used_count ();
4943 int target_resources_ok
=
4944 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
4946 if (target_resources_ok
== 0)
4947 error (_("No hardware breakpoint support in the target."));
4948 else if (target_resources_ok
< 0)
4949 error (_("Hardware breakpoints used exceeds limit."));
4952 /* Now set all the breakpoints. */
4955 for (i
= 0; i
< sals
.nelts
; i
++)
4957 struct breakpoint
*b
;
4958 struct symtab_and_line sal
= sals
.sals
[i
];
4961 describe_other_breakpoints (sal
.pc
, sal
.section
);
4963 b
= set_raw_breakpoint (sal
, type
);
4964 set_breakpoint_count (breakpoint_count
+ 1);
4965 b
->number
= breakpoint_count
;
4969 b
->addr_string
= addr_string
[i
];
4971 /* addr_string has to be used or breakpoint_re_set will delete
4973 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4974 b
->cond_string
= cond_string
[i
];
4975 b
->ignore_count
= ignore_count
;
4976 b
->enable_state
= bp_enabled
;
4977 b
->disposition
= disposition
;
4978 /* If resolving a pending breakpoint, a check must be made to see if
4979 the user has specified a new condition or commands for the
4980 breakpoint. A new condition will override any condition that was
4981 initially specified with the initial breakpoint command. */
4985 if (pending_bp
->cond_string
)
4987 arg
= pending_bp
->cond_string
;
4988 b
->cond_string
= savestring (arg
, strlen (arg
));
4989 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->loc
->address
), 0);
4991 error (_("Junk at end of pending breakpoint condition expression"));
4993 /* If there are commands associated with the breakpoint, they should
4995 if (pending_bp
->commands
)
4996 b
->commands
= copy_command_lines (pending_bp
->commands
);
4998 /* We have to copy over the ignore_count and thread as well. */
4999 b
->ignore_count
= pending_bp
->ignore_count
;
5000 b
->thread
= pending_bp
->thread
;
5007 /* Parse ARG which is assumed to be a SAL specification possibly
5008 followed by conditionals. On return, SALS contains an array of SAL
5009 addresses found. ADDR_STRING contains a vector of (canonical)
5010 address strings. ARG points to the end of the SAL. */
5013 parse_breakpoint_sals (char **address
,
5014 struct symtabs_and_lines
*sals
,
5015 char ***addr_string
,
5018 char *addr_start
= *address
;
5019 *addr_string
= NULL
;
5020 /* If no arg given, or if first arg is 'if ', use the default
5022 if ((*address
) == NULL
5023 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
5025 if (default_breakpoint_valid
)
5027 struct symtab_and_line sal
;
5028 init_sal (&sal
); /* initialize to zeroes */
5029 sals
->sals
= (struct symtab_and_line
*)
5030 xmalloc (sizeof (struct symtab_and_line
));
5031 sal
.pc
= default_breakpoint_address
;
5032 sal
.line
= default_breakpoint_line
;
5033 sal
.symtab
= default_breakpoint_symtab
;
5034 sal
.section
= find_pc_overlay (sal
.pc
);
5035 sals
->sals
[0] = sal
;
5039 error (_("No default breakpoint address now."));
5043 /* Force almost all breakpoints to be in terms of the
5044 current_source_symtab (which is decode_line_1's default). This
5045 should produce the results we want almost all of the time while
5046 leaving default_breakpoint_* alone.
5047 ObjC: However, don't match an Objective-C method name which
5048 may have a '+' or '-' succeeded by a '[' */
5050 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
5052 if (default_breakpoint_valid
5054 || ((strchr ("+-", (*address
)[0]) != NULL
)
5055 && ((*address
)[1] != '['))))
5056 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
5057 default_breakpoint_line
, addr_string
,
5060 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0,
5061 addr_string
, not_found_ptr
);
5063 /* For any SAL that didn't have a canonical string, fill one in. */
5064 if (sals
->nelts
> 0 && *addr_string
== NULL
)
5065 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
5066 if (addr_start
!= (*address
))
5069 for (i
= 0; i
< sals
->nelts
; i
++)
5071 /* Add the string if not present. */
5072 if ((*addr_string
)[i
] == NULL
)
5073 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
5079 /* Convert each SAL into a real PC. Verify that the PC can be
5080 inserted as a breakpoint. If it can't throw an error. */
5083 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
5087 for (i
= 0; i
< sals
->nelts
; i
++)
5089 resolve_sal_pc (&sals
->sals
[i
]);
5091 /* It's possible for the PC to be nonzero, but still an illegal
5092 value on some targets.
5094 For example, on HP-UX if you start gdb, and before running the
5095 inferior you try to set a breakpoint on a shared library function
5096 "foo" where the inferior doesn't call "foo" directly but does
5097 pass its address to another function call, then we do find a
5098 minimal symbol for the "foo", but it's address is invalid.
5099 (Appears to be an index into a table that the loader sets up
5100 when the inferior is run.)
5102 Give the target a chance to bless sals.sals[i].pc before we
5103 try to make a breakpoint for it. */
5104 #ifdef DEPRECATED_PC_REQUIRES_RUN_BEFORE_USE
5105 if (DEPRECATED_PC_REQUIRES_RUN_BEFORE_USE (sals
->sals
[i
].pc
))
5107 if (address
== NULL
)
5108 error (_("Cannot break without a running program."));
5110 error (_("Cannot break on %s without a running program."),
5118 do_captured_parse_breakpoint (struct ui_out
*ui
, void *data
)
5120 struct captured_parse_breakpoint_args
*args
= data
;
5122 parse_breakpoint_sals (args
->arg_p
, args
->sals_p
, args
->addr_string_p
,
5123 args
->not_found_ptr
);
5126 /* Set a breakpoint according to ARG (function, linenum or *address)
5127 flag: first bit : 0 non-temporary, 1 temporary.
5128 second bit : 0 normal breakpoint, 1 hardware breakpoint.
5130 PENDING_BP is non-NULL when this function is being called to resolve
5131 a pending breakpoint. */
5134 break_command_1 (char *arg
, int flag
, int from_tty
, struct breakpoint
*pending_bp
)
5136 struct gdb_exception e
;
5137 int tempflag
, hardwareflag
;
5138 struct symtabs_and_lines sals
;
5139 struct expression
**cond
= 0;
5140 struct symtab_and_line pending_sal
;
5141 char **cond_string
= (char **) NULL
;
5144 char *addr_start
= arg
;
5146 struct cleanup
*old_chain
;
5147 struct cleanup
*breakpoint_chain
= NULL
;
5148 struct captured_parse_breakpoint_args parse_args
;
5152 int ignore_count
= 0;
5155 hardwareflag
= flag
& BP_HARDWAREFLAG
;
5156 tempflag
= flag
& BP_TEMPFLAG
;
5162 parse_args
.arg_p
= &arg
;
5163 parse_args
.sals_p
= &sals
;
5164 parse_args
.addr_string_p
= &addr_string
;
5165 parse_args
.not_found_ptr
= ¬_found
;
5167 e
= catch_exception (uiout
, do_captured_parse_breakpoint
,
5168 &parse_args
, RETURN_MASK_ALL
);
5170 /* If caller is interested in rc value from parse, set value. */
5174 exception_print (gdb_stderr
, e
);
5179 case NOT_FOUND_ERROR
:
5180 /* If called to resolve pending breakpoint, just return
5185 exception_print (gdb_stderr
, e
);
5187 /* If pending breakpoint support is turned off, throw
5190 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
5191 deprecated_throw_reason (RETURN_ERROR
);
5193 /* If pending breakpoint support is auto query and the user
5194 selects no, then simply return the error code. */
5195 if (pending_break_support
== AUTO_BOOLEAN_AUTO
&&
5196 !nquery ("Make breakpoint pending on future shared library load? "))
5199 /* At this point, either the user was queried about setting
5200 a pending breakpoint and selected yes, or pending
5201 breakpoint behavior is on and thus a pending breakpoint
5202 is defaulted on behalf of the user. */
5203 copy_arg
= xstrdup (addr_start
);
5204 addr_string
= ©_arg
;
5206 sals
.sals
= &pending_sal
;
5211 exception_print (gdb_stderr
, e
);
5219 /* Create a chain of things that always need to be cleaned up. */
5220 old_chain
= make_cleanup (null_cleanup
, 0);
5224 /* Make sure that all storage allocated to SALS gets freed. */
5225 make_cleanup (xfree
, sals
.sals
);
5227 /* Cleanup the addr_string array but not its contents. */
5228 make_cleanup (xfree
, addr_string
);
5231 /* Allocate space for all the cond expressions. */
5232 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5233 make_cleanup (xfree
, cond
);
5235 /* Allocate space for all the cond strings. */
5236 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5237 make_cleanup (xfree
, cond_string
);
5239 /* ----------------------------- SNIP -----------------------------
5240 Anything added to the cleanup chain beyond this point is assumed
5241 to be part of a breakpoint. If the breakpoint create succeeds
5242 then the memory is not reclaimed. */
5243 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5245 /* Mark the contents of the addr_string for cleanup. These go on
5246 the breakpoint_chain and only occure if the breakpoint create
5248 for (i
= 0; i
< sals
.nelts
; i
++)
5250 if (addr_string
[i
] != NULL
)
5251 make_cleanup (xfree
, addr_string
[i
]);
5254 /* Resolve all line numbers to PC's and verify that the addresses
5255 are ok for the target. */
5257 breakpoint_sals_to_pc (&sals
, addr_start
);
5259 /* Verify that condition can be parsed, before setting any
5260 breakpoints. Allocate a separate condition expression for each
5262 thread
= -1; /* No specific thread yet */
5265 for (i
= 0; i
< sals
.nelts
; i
++)
5272 char *cond_start
= NULL
;
5273 char *cond_end
= NULL
;
5274 while (*tok
== ' ' || *tok
== '\t')
5279 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5282 toklen
= end_tok
- tok
;
5284 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5286 tok
= cond_start
= end_tok
+ 1;
5287 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
),
5289 make_cleanup (xfree
, cond
[i
]);
5291 cond_string
[i
] = savestring (cond_start
,
5292 cond_end
- cond_start
);
5293 make_cleanup (xfree
, cond_string
[i
]);
5295 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5301 thread
= strtol (tok
, &tok
, 0);
5303 error (_("Junk after thread keyword."));
5304 if (!valid_thread_id (thread
))
5305 error (_("Unknown thread %d."), thread
);
5308 error (_("Junk at end of arguments."));
5311 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5312 hardwareflag
? bp_hardware_breakpoint
5314 tempflag
? disp_del
: disp_donttouch
,
5315 thread
, ignore_count
, from_tty
,
5320 struct symtab_and_line sal
;
5321 struct breakpoint
*b
;
5326 make_cleanup (xfree
, copy_arg
);
5328 b
= set_raw_breakpoint (sal
, hardwareflag
? bp_hardware_breakpoint
5330 set_breakpoint_count (breakpoint_count
+ 1);
5331 b
->number
= breakpoint_count
;
5334 b
->addr_string
= *addr_string
;
5335 b
->cond_string
= *cond_string
;
5336 b
->ignore_count
= ignore_count
;
5338 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5339 b
->from_tty
= from_tty
;
5345 warning (_("Multiple breakpoints were set.\n"
5346 "Use the \"delete\" command to delete unwanted breakpoints."));
5347 /* That's it. Discard the cleanups for data inserted into the
5349 discard_cleanups (breakpoint_chain
);
5350 /* But cleanup everything else. */
5351 do_cleanups (old_chain
);
5356 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
5357 linenum or *address) with COND and IGNORE_COUNT. */
5359 struct captured_breakpoint_args
5370 do_captured_breakpoint (struct ui_out
*uiout
, void *data
)
5372 struct captured_breakpoint_args
*args
= data
;
5373 struct symtabs_and_lines sals
;
5374 struct expression
**cond
;
5375 struct cleanup
*old_chain
;
5376 struct cleanup
*breakpoint_chain
= NULL
;
5383 /* Parse the source and lines spec. Delay check that the expression
5384 didn't contain trailing garbage until after cleanups are in
5388 address_end
= args
->address
;
5390 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
, 0);
5395 /* Create a chain of things at always need to be cleaned up. */
5396 old_chain
= make_cleanup (null_cleanup
, 0);
5398 /* Always have a addr_string array, even if it is empty. */
5399 make_cleanup (xfree
, addr_string
);
5401 /* Make sure that all storage allocated to SALS gets freed. */
5402 make_cleanup (xfree
, sals
.sals
);
5404 /* Allocate space for all the cond expressions. */
5405 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5406 make_cleanup (xfree
, cond
);
5408 /* Allocate space for all the cond strings. */
5409 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5410 make_cleanup (xfree
, cond_string
);
5412 /* ----------------------------- SNIP -----------------------------
5413 Anything added to the cleanup chain beyond this point is assumed
5414 to be part of a breakpoint. If the breakpoint create goes
5415 through then that memory is not cleaned up. */
5416 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5418 /* Mark the contents of the addr_string for cleanup. These go on
5419 the breakpoint_chain and only occure if the breakpoint create
5421 for (i
= 0; i
< sals
.nelts
; i
++)
5423 if (addr_string
[i
] != NULL
)
5424 make_cleanup (xfree
, addr_string
[i
]);
5427 /* Wait until now before checking for garbage at the end of the
5428 address. That way cleanups can take care of freeing any
5430 if (*address_end
!= '\0')
5431 error (_("Garbage %s following breakpoint address"), address_end
);
5433 /* Resolve all line numbers to PC's. */
5434 breakpoint_sals_to_pc (&sals
, args
->address
);
5436 /* Verify that conditions can be parsed, before setting any
5438 for (i
= 0; i
< sals
.nelts
; i
++)
5440 if (args
->condition
!= NULL
)
5442 char *tok
= args
->condition
;
5443 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
5445 error (_("Garbage %s follows condition"), tok
);
5446 make_cleanup (xfree
, cond
[i
]);
5447 cond_string
[i
] = xstrdup (args
->condition
);
5451 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5452 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
5453 args
->tempflag
? disp_del
: disp_donttouch
,
5454 args
->thread
, args
->ignore_count
, 0/*from-tty*/,
5455 NULL
/*pending_bp*/);
5457 /* That's it. Discard the cleanups for data inserted into the
5459 discard_cleanups (breakpoint_chain
);
5460 /* But cleanup everything else. */
5461 do_cleanups (old_chain
);
5466 gdb_breakpoint (char *address
, char *condition
,
5467 int hardwareflag
, int tempflag
,
5468 int thread
, int ignore_count
,
5469 char **error_message
)
5471 struct captured_breakpoint_args args
;
5472 args
.address
= address
;
5473 args
.condition
= condition
;
5474 args
.hardwareflag
= hardwareflag
;
5475 args
.tempflag
= tempflag
;
5476 args
.thread
= thread
;
5477 args
.ignore_count
= ignore_count
;
5478 return catch_exceptions_with_msg (uiout
, do_captured_breakpoint
, &args
,
5479 error_message
, RETURN_MASK_ALL
);
5483 /* Helper function for break_command_1 and disassemble_command. */
5486 resolve_sal_pc (struct symtab_and_line
*sal
)
5490 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5492 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5493 error (_("No line %d in file \"%s\"."),
5494 sal
->line
, sal
->symtab
->filename
);
5498 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5500 struct blockvector
*bv
;
5505 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &index
, sal
->symtab
);
5508 b
= BLOCKVECTOR_BLOCK (bv
, index
);
5509 sym
= block_function (b
);
5512 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5513 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5517 /* It really is worthwhile to have the section, so we'll just
5518 have to look harder. This case can be executed if we have
5519 line numbers but no functions (as can happen in assembly
5522 struct minimal_symbol
*msym
;
5524 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5526 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5533 break_command (char *arg
, int from_tty
)
5535 break_command_1 (arg
, 0, from_tty
, NULL
);
5539 tbreak_command (char *arg
, int from_tty
)
5541 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
, NULL
);
5545 hbreak_command (char *arg
, int from_tty
)
5547 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
, NULL
);
5551 thbreak_command (char *arg
, int from_tty
)
5553 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
, NULL
);
5557 stop_command (char *arg
, int from_tty
)
5559 printf_filtered (_("Specify the type of breakpoint to set.\n\
5560 Usage: stop in <function | address>\n\
5561 stop at <line>\n"));
5565 stopin_command (char *arg
, int from_tty
)
5569 if (arg
== (char *) NULL
)
5571 else if (*arg
!= '*')
5576 /* look for a ':'. If this is a line number specification, then
5577 say it is bad, otherwise, it should be an address or
5578 function/method name */
5579 while (*argptr
&& !hasColon
)
5581 hasColon
= (*argptr
== ':');
5586 badInput
= (*argptr
!= ':'); /* Not a class::method */
5588 badInput
= isdigit (*arg
); /* a simple line number */
5592 printf_filtered (_("Usage: stop in <function | address>\n"));
5594 break_command_1 (arg
, 0, from_tty
, NULL
);
5598 stopat_command (char *arg
, int from_tty
)
5602 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5609 /* look for a ':'. If there is a '::' then get out, otherwise
5610 it is probably a line number. */
5611 while (*argptr
&& !hasColon
)
5613 hasColon
= (*argptr
== ':');
5618 badInput
= (*argptr
== ':'); /* we have class::method */
5620 badInput
= !isdigit (*arg
); /* not a line number */
5624 printf_filtered (_("Usage: stop at <line>\n"));
5626 break_command_1 (arg
, 0, from_tty
, NULL
);
5629 /* accessflag: hw_write: watch write,
5630 hw_read: watch read,
5631 hw_access: watch access (read or write) */
5633 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5635 struct breakpoint
*b
;
5636 struct symtab_and_line sal
;
5637 struct expression
*exp
;
5638 struct block
*exp_valid_block
;
5639 struct value
*val
, *mark
;
5640 struct frame_info
*frame
;
5641 struct frame_info
*prev_frame
= NULL
;
5642 char *exp_start
= NULL
;
5643 char *exp_end
= NULL
;
5644 char *tok
, *end_tok
;
5646 char *cond_start
= NULL
;
5647 char *cond_end
= NULL
;
5648 struct expression
*cond
= NULL
;
5649 int i
, other_type_used
, target_resources_ok
= 0;
5650 enum bptype bp_type
;
5653 init_sal (&sal
); /* initialize to zeroes */
5655 /* Parse arguments. */
5656 innermost_block
= NULL
;
5658 exp
= parse_exp_1 (&arg
, 0, 0);
5660 exp_valid_block
= innermost_block
;
5661 mark
= value_mark ();
5662 val
= evaluate_expression (exp
);
5663 release_value (val
);
5664 if (value_lazy (val
))
5665 value_fetch_lazy (val
);
5668 while (*tok
== ' ' || *tok
== '\t')
5672 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5675 toklen
= end_tok
- tok
;
5676 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5678 tok
= cond_start
= end_tok
+ 1;
5679 cond
= parse_exp_1 (&tok
, 0, 0);
5683 error (_("Junk at end of command."));
5685 if (accessflag
== hw_read
)
5686 bp_type
= bp_read_watchpoint
;
5687 else if (accessflag
== hw_access
)
5688 bp_type
= bp_access_watchpoint
;
5690 bp_type
= bp_hardware_watchpoint
;
5692 mem_cnt
= can_use_hardware_watchpoint (val
);
5693 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5694 error (_("Expression cannot be implemented with read/access watchpoint."));
5697 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5698 target_resources_ok
=
5699 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5701 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5702 error (_("Target does not support this type of hardware watchpoint."));
5704 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5705 error (_("Target can only support one kind of HW watchpoint at a time."));
5708 #if defined(HPUXHPPA)
5709 /* On HP-UX if you set a h/w
5710 watchpoint before the "run" command, the inferior dies with a e.g.,
5711 SIGILL once you start it. I initially believed this was due to a
5712 bad interaction between page protection traps and the initial
5713 startup sequence by the dynamic linker.
5715 However, I tried avoiding that by having HP-UX's implementation of
5716 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5717 yet, which forced slow watches before a "run" or "attach", and it
5718 still fails somewhere in the startup code.
5720 Until I figure out what's happening, I'm disallowing watches altogether
5721 before the "run" or "attach" command. We'll tell the user they must
5722 set watches after getting the program started. */
5723 if (!target_has_execution
)
5725 warning (_("can't do that without a running program; try \"break main\"), \"run\" first");
5728 #endif /* HPUXHPPA */
5730 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5731 watchpoint could not be set. */
5732 if (!mem_cnt
|| target_resources_ok
<= 0)
5733 bp_type
= bp_watchpoint
;
5735 /* Now set up the breakpoint. */
5736 b
= set_raw_breakpoint (sal
, bp_type
);
5737 set_breakpoint_count (breakpoint_count
+ 1);
5738 b
->number
= breakpoint_count
;
5739 b
->disposition
= disp_donttouch
;
5741 b
->exp_valid_block
= exp_valid_block
;
5742 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5746 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5750 frame
= block_innermost_frame (exp_valid_block
);
5753 prev_frame
= get_prev_frame (frame
);
5754 b
->watchpoint_frame
= get_frame_id (frame
);
5758 memset (&b
->watchpoint_frame
, 0, sizeof (b
->watchpoint_frame
));
5761 /* If the expression is "local", then set up a "watchpoint scope"
5762 breakpoint at the point where we've left the scope of the watchpoint
5764 if (innermost_block
)
5768 struct breakpoint
*scope_breakpoint
;
5769 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5770 bp_watchpoint_scope
);
5772 scope_breakpoint
->enable_state
= bp_enabled
;
5774 /* Automatically delete the breakpoint when it hits. */
5775 scope_breakpoint
->disposition
= disp_del
;
5777 /* Only break in the proper frame (help with recursion). */
5778 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5780 /* Set the address at which we will stop. */
5781 scope_breakpoint
->loc
->requested_address
5782 = get_frame_pc (prev_frame
);
5783 scope_breakpoint
->loc
->address
5784 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
,
5785 scope_breakpoint
->type
);
5787 /* The scope breakpoint is related to the watchpoint. We
5788 will need to act on them together. */
5789 b
->related_breakpoint
= scope_breakpoint
;
5792 value_free_to_mark (mark
);
5796 /* Return count of locations need to be watched and can be handled
5797 in hardware. If the watchpoint can not be handled
5798 in hardware return zero. */
5800 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5801 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5802 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5806 can_use_hardware_watchpoint (struct value
*v
)
5808 int found_memory_cnt
= 0;
5809 struct value
*head
= v
;
5811 /* Did the user specifically forbid us to use hardware watchpoints? */
5812 if (!can_use_hw_watchpoints
)
5815 /* Make sure that the value of the expression depends only upon
5816 memory contents, and values computed from them within GDB. If we
5817 find any register references or function calls, we can't use a
5818 hardware watchpoint.
5820 The idea here is that evaluating an expression generates a series
5821 of values, one holding the value of every subexpression. (The
5822 expression a*b+c has five subexpressions: a, b, a*b, c, and
5823 a*b+c.) GDB's values hold almost enough information to establish
5824 the criteria given above --- they identify memory lvalues,
5825 register lvalues, computed values, etcetera. So we can evaluate
5826 the expression, and then scan the chain of values that leaves
5827 behind to decide whether we can detect any possible change to the
5828 expression's final value using only hardware watchpoints.
5830 However, I don't think that the values returned by inferior
5831 function calls are special in any way. So this function may not
5832 notice that an expression involving an inferior function call
5833 can't be watched with hardware watchpoints. FIXME. */
5834 for (; v
; v
= value_next (v
))
5836 if (VALUE_LVAL (v
) == lval_memory
)
5839 /* A lazy memory lvalue is one that GDB never needed to fetch;
5840 we either just used its address (e.g., `a' in `a.b') or
5841 we never needed it at all (e.g., `a' in `a,b'). */
5845 /* Ahh, memory we actually used! Check if we can cover
5846 it with hardware watchpoints. */
5847 struct type
*vtype
= check_typedef (value_type (v
));
5849 /* We only watch structs and arrays if user asked for it
5850 explicitly, never if they just happen to appear in a
5851 middle of some value chain. */
5853 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
5854 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
5856 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
5857 int len
= TYPE_LENGTH (value_type (v
));
5859 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
5866 else if (VALUE_LVAL (v
) != not_lval
5867 && deprecated_value_modifiable (v
) == 0)
5868 return 0; /* ??? What does this represent? */
5869 else if (VALUE_LVAL (v
) == lval_register
)
5870 return 0; /* cannot watch a register with a HW watchpoint */
5873 /* The expression itself looks suitable for using a hardware
5874 watchpoint, but give the target machine a chance to reject it. */
5875 return found_memory_cnt
;
5879 watch_command_wrapper (char *arg
, int from_tty
)
5881 watch_command (arg
, from_tty
);
5885 watch_command (char *arg
, int from_tty
)
5887 watch_command_1 (arg
, hw_write
, from_tty
);
5891 rwatch_command_wrapper (char *arg
, int from_tty
)
5893 rwatch_command (arg
, from_tty
);
5897 rwatch_command (char *arg
, int from_tty
)
5899 watch_command_1 (arg
, hw_read
, from_tty
);
5903 awatch_command_wrapper (char *arg
, int from_tty
)
5905 awatch_command (arg
, from_tty
);
5909 awatch_command (char *arg
, int from_tty
)
5911 watch_command_1 (arg
, hw_access
, from_tty
);
5915 /* Helper routines for the until_command routine in infcmd.c. Here
5916 because it uses the mechanisms of breakpoints. */
5918 /* This function is called by fetch_inferior_event via the
5919 cmd_continuation pointer, to complete the until command. It takes
5920 care of cleaning up the temporary breakpoints set up by the until
5923 until_break_command_continuation (struct continuation_arg
*arg
)
5925 struct cleanup
*cleanups
;
5927 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
5928 do_exec_cleanups (cleanups
);
5932 until_break_command (char *arg
, int from_tty
, int anywhere
)
5934 struct symtabs_and_lines sals
;
5935 struct symtab_and_line sal
;
5936 struct frame_info
*prev_frame
= get_prev_frame (deprecated_selected_frame
);
5937 struct breakpoint
*breakpoint
;
5938 struct cleanup
*old_chain
;
5939 struct continuation_arg
*arg1
;
5942 clear_proceed_status ();
5944 /* Set a breakpoint where the user wants it and at return from
5947 if (default_breakpoint_valid
)
5948 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
5949 default_breakpoint_line
, (char ***) NULL
, NULL
);
5951 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
5952 0, (char ***) NULL
, NULL
);
5954 if (sals
.nelts
!= 1)
5955 error (_("Couldn't get information on specified line."));
5958 xfree (sals
.sals
); /* malloc'd, so freed */
5961 error (_("Junk at end of arguments."));
5963 resolve_sal_pc (&sal
);
5966 /* If the user told us to continue until a specified location,
5967 we don't specify a frame at which we need to stop. */
5968 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
5970 /* Otherwise, specify the current frame, because we want to stop only
5971 at the very same frame. */
5972 breakpoint
= set_momentary_breakpoint (sal
,
5973 get_frame_id (deprecated_selected_frame
),
5976 if (!target_can_async_p ())
5977 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
5979 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
5981 /* If we are running asynchronously, and the target supports async
5982 execution, we are not waiting for the target to stop, in the call
5983 tp proceed, below. This means that we cannot delete the
5984 brekpoints until the target has actually stopped. The only place
5985 where we get a chance to do that is in fetch_inferior_event, so
5986 we must set things up for that. */
5988 if (target_can_async_p ())
5990 /* In this case the arg for the continuation is just the point
5991 in the exec_cleanups chain from where to start doing
5992 cleanups, because all the continuation does is the cleanups in
5993 the exec_cleanup_chain. */
5995 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
5997 arg1
->data
.pointer
= old_chain
;
5999 add_continuation (until_break_command_continuation
, arg1
);
6002 /* Keep within the current frame, or in frames called by the current
6006 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
6007 sal
.pc
= get_frame_pc (prev_frame
);
6008 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
6010 if (!target_can_async_p ())
6011 make_cleanup_delete_breakpoint (breakpoint
);
6013 make_exec_cleanup_delete_breakpoint (breakpoint
);
6016 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
6017 /* Do the cleanups now, anly if we are not running asynchronously,
6018 of if we are, but the target is still synchronous. */
6019 if (!target_can_async_p ())
6020 do_cleanups (old_chain
);
6024 ep_skip_leading_whitespace (char **s
)
6026 if ((s
== NULL
) || (*s
== NULL
))
6028 while (isspace (**s
))
6032 /* This function examines a string, and attempts to find a token
6033 that might be an event name in the leading characters. If a
6034 possible match is found, a pointer to the last character of
6035 the token is returned. Else, NULL is returned. */
6038 ep_find_event_name_end (char *arg
)
6041 char *event_name_end
= NULL
;
6043 /* If we could depend upon the presense of strrpbrk, we'd use that... */
6047 /* We break out of the loop when we find a token delimiter.
6048 Basically, we're looking for alphanumerics and underscores;
6049 anything else delimites the token. */
6052 if (!isalnum (*s
) && (*s
!= '_'))
6058 return event_name_end
;
6062 /* This function attempts to parse an optional "if <cond>" clause
6063 from the arg string. If one is not found, it returns NULL.
6065 Else, it returns a pointer to the condition string. (It does not
6066 attempt to evaluate the string against a particular block.) And,
6067 it updates arg to point to the first character following the parsed
6068 if clause in the arg string. */
6071 ep_parse_optional_if_clause (char **arg
)
6075 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
6078 /* Skip the "if" keyword. */
6081 /* Skip any extra leading whitespace, and record the start of the
6082 condition string. */
6083 ep_skip_leading_whitespace (arg
);
6086 /* Assume that the condition occupies the remainder of the arg string. */
6087 (*arg
) += strlen (cond_string
);
6092 /* This function attempts to parse an optional filename from the arg
6093 string. If one is not found, it returns NULL.
6095 Else, it returns a pointer to the parsed filename. (This function
6096 makes no attempt to verify that a file of that name exists, or is
6097 accessible.) And, it updates arg to point to the first character
6098 following the parsed filename in the arg string.
6100 Note that clients needing to preserve the returned filename for
6101 future access should copy it to their own buffers. */
6103 ep_parse_optional_filename (char **arg
)
6105 static char filename
[1024];
6110 if ((*arg_p
== '\0') || isspace (*arg_p
))
6128 /* Commands to deal with catching events, such as signals, exceptions,
6129 process start/exit, etc. */
6133 catch_fork
, catch_vfork
6138 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
6141 char *cond_string
= NULL
;
6143 ep_skip_leading_whitespace (&arg
);
6145 /* The allowed syntax is:
6147 catch [v]fork if <cond>
6149 First, check if there's an if clause. */
6150 cond_string
= ep_parse_optional_if_clause (&arg
);
6152 if ((*arg
!= '\0') && !isspace (*arg
))
6153 error (_("Junk at end of arguments."));
6155 /* If this target supports it, create a fork or vfork catchpoint
6156 and enable reporting of such events. */
6160 create_fork_event_catchpoint (tempflag
, cond_string
);
6163 create_vfork_event_catchpoint (tempflag
, cond_string
);
6166 error (_("unsupported or unknown fork kind; cannot catch it"));
6172 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6174 char *cond_string
= NULL
;
6176 ep_skip_leading_whitespace (&arg
);
6178 /* The allowed syntax is:
6180 catch exec if <cond>
6182 First, check if there's an if clause. */
6183 cond_string
= ep_parse_optional_if_clause (&arg
);
6185 if ((*arg
!= '\0') && !isspace (*arg
))
6186 error (_("Junk at end of arguments."));
6188 /* If this target supports it, create an exec catchpoint
6189 and enable reporting of such events. */
6190 create_exec_event_catchpoint (tempflag
, cond_string
);
6194 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6196 char *dll_pathname
= NULL
;
6197 char *cond_string
= NULL
;
6199 ep_skip_leading_whitespace (&arg
);
6201 /* The allowed syntax is:
6203 catch load if <cond>
6204 catch load <filename>
6205 catch load <filename> if <cond>
6207 The user is not allowed to specify the <filename> after an
6210 We'll ignore the pathological case of a file named "if".
6212 First, check if there's an if clause. If so, then there
6213 cannot be a filename. */
6214 cond_string
= ep_parse_optional_if_clause (&arg
);
6216 /* If there was an if clause, then there cannot be a filename.
6217 Else, there might be a filename and an if clause. */
6218 if (cond_string
== NULL
)
6220 dll_pathname
= ep_parse_optional_filename (&arg
);
6221 ep_skip_leading_whitespace (&arg
);
6222 cond_string
= ep_parse_optional_if_clause (&arg
);
6225 if ((*arg
!= '\0') && !isspace (*arg
))
6226 error (_("Junk at end of arguments."));
6228 /* Create a load breakpoint that only triggers when a load of
6229 the specified dll (or any dll, if no pathname was specified)
6231 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6232 dll_pathname
, cond_string
);
6236 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6238 char *dll_pathname
= NULL
;
6239 char *cond_string
= NULL
;
6241 ep_skip_leading_whitespace (&arg
);
6243 /* The allowed syntax is:
6245 catch unload if <cond>
6246 catch unload <filename>
6247 catch unload <filename> if <cond>
6249 The user is not allowed to specify the <filename> after an
6252 We'll ignore the pathological case of a file named "if".
6254 First, check if there's an if clause. If so, then there
6255 cannot be a filename. */
6256 cond_string
= ep_parse_optional_if_clause (&arg
);
6258 /* If there was an if clause, then there cannot be a filename.
6259 Else, there might be a filename and an if clause. */
6260 if (cond_string
== NULL
)
6262 dll_pathname
= ep_parse_optional_filename (&arg
);
6263 ep_skip_leading_whitespace (&arg
);
6264 cond_string
= ep_parse_optional_if_clause (&arg
);
6267 if ((*arg
!= '\0') && !isspace (*arg
))
6268 error (_("Junk at end of arguments."));
6270 /* Create an unload breakpoint that only triggers when an unload of
6271 the specified dll (or any dll, if no pathname was specified)
6273 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6274 dll_pathname
, cond_string
);
6277 /* Commands to deal with catching exceptions. */
6279 /* Set a breakpoint at the specified callback routine for an
6280 exception event callback */
6283 create_exception_catchpoint (int tempflag
, char *cond_string
,
6284 enum exception_event_kind ex_event
,
6285 struct symtab_and_line
*sal
)
6287 struct breakpoint
*b
;
6288 int thread
= -1; /* All threads. */
6291 if (!sal
) /* no exception support? */
6296 case EX_EVENT_THROW
:
6297 bptype
= bp_catch_throw
;
6299 case EX_EVENT_CATCH
:
6300 bptype
= bp_catch_catch
;
6302 default: /* error condition */
6303 error (_("Internal error -- invalid catchpoint kind"));
6306 b
= set_raw_breakpoint (*sal
, bptype
);
6307 set_breakpoint_count (breakpoint_count
+ 1);
6308 b
->number
= breakpoint_count
;
6310 b
->cond_string
= (cond_string
== NULL
) ?
6311 NULL
: savestring (cond_string
, strlen (cond_string
));
6313 b
->addr_string
= NULL
;
6314 b
->enable_state
= bp_enabled
;
6315 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6319 static enum print_stop_action
6320 print_exception_catchpoint (struct breakpoint
*b
)
6322 annotate_catchpoint (b
->number
);
6324 if (strstr (b
->addr_string
, "throw") != NULL
)
6325 printf_filtered (_("\nCatchpoint %d (exception thrown)\n"),
6328 printf_filtered (_("\nCatchpoint %d (exception caught)\n"),
6331 return PRINT_SRC_AND_LOC
;
6335 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6340 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6343 *last_addr
= b
->loc
->address
;
6344 if (strstr (b
->addr_string
, "throw") != NULL
)
6345 ui_out_field_string (uiout
, "what", "exception throw");
6347 ui_out_field_string (uiout
, "what", "exception catch");
6351 print_mention_exception_catchpoint (struct breakpoint
*b
)
6353 if (strstr (b
->addr_string
, "throw") != NULL
)
6354 printf_filtered (_("Catchpoint %d (throw)"), b
->number
);
6356 printf_filtered (_("Catchpoint %d (catch)"), b
->number
);
6359 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6360 print_exception_catchpoint
,
6361 print_one_exception_catchpoint
,
6362 print_mention_exception_catchpoint
6366 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6367 enum exception_event_kind ex_event
, int from_tty
)
6369 char *trigger_func_name
, *nameptr
;
6370 struct symtabs_and_lines sals
;
6371 struct breakpoint
*b
;
6373 if (ex_event
== EX_EVENT_CATCH
)
6374 trigger_func_name
= xstrdup ("__cxa_begin_catch");
6376 trigger_func_name
= xstrdup ("__cxa_throw");
6378 nameptr
= trigger_func_name
;
6379 sals
= decode_line_1 (&nameptr
, 1, NULL
, 0, NULL
, NULL
);
6380 if (sals
.nelts
== 0)
6382 xfree (trigger_func_name
);
6386 b
= set_raw_breakpoint (sals
.sals
[0], bp_breakpoint
);
6387 set_breakpoint_count (breakpoint_count
+ 1);
6388 b
->number
= breakpoint_count
;
6390 b
->cond_string
= (cond_string
== NULL
) ?
6391 NULL
: savestring (cond_string
, strlen (cond_string
));
6393 b
->addr_string
= trigger_func_name
;
6394 b
->enable_state
= bp_enabled
;
6395 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6396 b
->ops
= &gnu_v3_exception_catchpoint_ops
;
6403 /* Deal with "catch catch" and "catch throw" commands */
6406 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6407 int tempflag
, int from_tty
)
6409 char *cond_string
= NULL
;
6410 struct symtab_and_line
*sal
= NULL
;
6412 ep_skip_leading_whitespace (&arg
);
6414 cond_string
= ep_parse_optional_if_clause (&arg
);
6416 if ((*arg
!= '\0') && !isspace (*arg
))
6417 error (_("Junk at end of arguments."));
6419 if ((ex_event
!= EX_EVENT_THROW
) &&
6420 (ex_event
!= EX_EVENT_CATCH
))
6421 error (_("Unsupported or unknown exception event; cannot catch it"));
6423 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6426 /* See if we can find a callback routine */
6427 sal
= target_enable_exception_callback (ex_event
, 1);
6431 /* We have callbacks from the runtime system for exceptions.
6432 Set a breakpoint on the sal found, if no errors */
6433 if (sal
!= (struct symtab_and_line
*) -1)
6434 create_exception_catchpoint (tempflag
, cond_string
, ex_event
, sal
);
6436 return; /* something went wrong with setting up callbacks */
6439 warning (_("Unsupported with this platform/compiler combination."));
6442 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6443 inside a catch_errors */
6446 cover_target_enable_exception_callback (void *arg
)
6448 args_for_catchpoint_enable
*args
= arg
;
6449 struct symtab_and_line
*sal
;
6450 sal
= target_enable_exception_callback (args
->kind
, args
->enable_p
);
6453 else if (sal
== (struct symtab_and_line
*) -1)
6456 return 1; /*is valid */
6460 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6463 /* The first argument may be an event name, such as "start" or "load".
6464 If so, then handle it as such. If it doesn't match an event name,
6465 then attempt to interpret it as an exception name. (This latter is
6466 the v4.16-and-earlier GDB meaning of the "catch" command.)
6468 First, try to find the bounds of what might be an event name. */
6469 char *arg1_start
= arg
;
6473 if (arg1_start
== NULL
)
6475 /* Old behaviour was to use pre-v-4.16 syntax */
6476 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6478 /* Now, this is not allowed */
6479 error (_("Catch requires an event name."));
6482 arg1_end
= ep_find_event_name_end (arg1_start
);
6483 if (arg1_end
== NULL
)
6484 error (_("catch requires an event"));
6485 arg1_length
= arg1_end
+ 1 - arg1_start
;
6487 /* Try to match what we found against known event names. */
6488 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6490 error (_("Catch of signal not yet implemented"));
6492 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6494 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6495 tempflag
, from_tty
);
6497 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6499 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6500 tempflag
, from_tty
);
6502 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6504 error (_("Catch of thread_start not yet implemented"));
6506 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6508 error (_("Catch of thread_exit not yet implemented"));
6510 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6512 error (_("Catch of thread_join not yet implemented"));
6514 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6516 error (_("Catch of start not yet implemented"));
6518 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6520 error (_("Catch of exit not yet implemented"));
6522 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6524 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6526 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6528 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6530 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6532 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6534 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6536 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6538 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6540 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6542 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6544 error (_("Catch of stop not yet implemented"));
6547 /* This doesn't appear to be an event name */
6551 /* Pre-v.4.16 behaviour was to treat the argument
6552 as the name of an exception */
6553 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6554 /* Now this is not allowed */
6555 error (_("Unknown event kind specified for catch"));
6560 /* Used by the gui, could be made a worker for other things. */
6563 set_breakpoint_sal (struct symtab_and_line sal
)
6565 struct breakpoint
*b
;
6566 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6567 set_breakpoint_count (breakpoint_count
+ 1);
6568 b
->number
= breakpoint_count
;
6575 catch_command (char *arg
, int from_tty
)
6577 catch_command_1 (arg
, 0, from_tty
);
6582 tcatch_command (char *arg
, int from_tty
)
6584 catch_command_1 (arg
, 1, from_tty
);
6587 /* Delete breakpoints by address or line. */
6590 clear_command (char *arg
, int from_tty
)
6592 struct breakpoint
*b
, *tmp
, *prev
, *found
;
6594 struct symtabs_and_lines sals
;
6595 struct symtab_and_line sal
;
6600 sals
= decode_line_spec (arg
, 1);
6605 sals
.sals
= (struct symtab_and_line
*)
6606 xmalloc (sizeof (struct symtab_and_line
));
6607 make_cleanup (xfree
, sals
.sals
);
6608 init_sal (&sal
); /* initialize to zeroes */
6609 sal
.line
= default_breakpoint_line
;
6610 sal
.symtab
= default_breakpoint_symtab
;
6611 sal
.pc
= default_breakpoint_address
;
6612 if (sal
.symtab
== 0)
6613 error (_("No source file specified."));
6621 /* For each line spec given, delete bps which correspond
6622 to it. Do it in two passes, solely to preserve the current
6623 behavior that from_tty is forced true if we delete more than
6627 for (i
= 0; i
< sals
.nelts
; i
++)
6629 /* If exact pc given, clear bpts at that pc.
6630 If line given (pc == 0), clear all bpts on specified line.
6631 If defaulting, clear all bpts on default line
6634 defaulting sal.pc != 0 tests to do
6639 1 0 <can't happen> */
6644 /* Find all matching breakpoints, remove them from the
6645 breakpoint chain, and add them to the 'found' chain. */
6646 ALL_BREAKPOINTS_SAFE (b
, tmp
)
6648 /* Are we going to delete b? */
6649 if (b
->type
!= bp_none
6650 && b
->type
!= bp_watchpoint
6651 && b
->type
!= bp_hardware_watchpoint
6652 && b
->type
!= bp_read_watchpoint
6653 && b
->type
!= bp_access_watchpoint
6654 /* Not if b is a watchpoint of any sort... */
6655 && (((sal
.pc
&& (b
->loc
->address
== sal
.pc
))
6656 && (!section_is_overlay (b
->loc
->section
)
6657 || b
->loc
->section
== sal
.section
))
6658 /* Yes, if sal.pc matches b (modulo overlays). */
6659 || ((default_match
|| (0 == sal
.pc
))
6660 && b
->source_file
!= NULL
6661 && sal
.symtab
!= NULL
6662 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6663 && b
->line_number
== sal
.line
)))
6664 /* Yes, if sal source file and line matches b. */
6666 /* Remove it from breakpoint_chain... */
6667 if (b
== breakpoint_chain
)
6669 /* b is at the head of the list */
6670 breakpoint_chain
= b
->next
;
6674 prev
->next
= b
->next
;
6676 /* And add it to 'found' chain. */
6682 /* Keep b, and keep a pointer to it. */
6687 /* Now go thru the 'found' chain and delete them. */
6691 error (_("No breakpoint at %s."), arg
);
6693 error (_("No breakpoint at this line."));
6697 from_tty
= 1; /* Always report if deleted more than one */
6701 printf_unfiltered (_("Deleted breakpoint "));
6703 printf_unfiltered (_("Deleted breakpoints "));
6705 breakpoints_changed ();
6709 printf_unfiltered ("%d ", found
->number
);
6711 delete_breakpoint (found
);
6715 putchar_unfiltered ('\n');
6718 /* Delete breakpoint in BS if they are `delete' breakpoints and
6719 all breakpoints that are marked for deletion, whether hit or not.
6720 This is called after any breakpoint is hit, or after errors. */
6723 breakpoint_auto_delete (bpstat bs
)
6725 struct breakpoint
*b
, *temp
;
6727 for (; bs
; bs
= bs
->next
)
6728 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== disp_del
6730 delete_breakpoint (bs
->breakpoint_at
);
6732 ALL_BREAKPOINTS_SAFE (b
, temp
)
6734 if (b
->disposition
== disp_del_at_next_stop
)
6735 delete_breakpoint (b
);
6739 /* Delete a breakpoint and clean up all traces of it in the data
6743 delete_breakpoint (struct breakpoint
*bpt
)
6745 struct breakpoint
*b
;
6747 struct bp_location
*loc
;
6749 gdb_assert (bpt
!= NULL
);
6751 /* Has this bp already been deleted? This can happen because multiple
6752 lists can hold pointers to bp's. bpstat lists are especial culprits.
6754 One example of this happening is a watchpoint's scope bp. When the
6755 scope bp triggers, we notice that the watchpoint is out of scope, and
6756 delete it. We also delete its scope bp. But the scope bp is marked
6757 "auto-deleting", and is already on a bpstat. That bpstat is then
6758 checked for auto-deleting bp's, which are deleted.
6760 A real solution to this problem might involve reference counts in bp's,
6761 and/or giving them pointers back to their referencing bpstat's, and
6762 teaching delete_breakpoint to only free a bp's storage when no more
6763 references were extent. A cheaper bandaid was chosen. */
6764 if (bpt
->type
== bp_none
)
6767 if (deprecated_delete_breakpoint_hook
)
6768 deprecated_delete_breakpoint_hook (bpt
);
6769 breakpoint_delete_event (bpt
->number
);
6771 if (bpt
->loc
->inserted
)
6772 remove_breakpoint (bpt
->loc
, mark_inserted
);
6774 free_valchain (bpt
->loc
);
6776 if (breakpoint_chain
== bpt
)
6777 breakpoint_chain
= bpt
->next
;
6779 if (bp_location_chain
== bpt
->loc
)
6780 bp_location_chain
= bpt
->loc
->next
;
6782 /* If we have callback-style exception catchpoints, don't go through
6783 the adjustments to the C++ runtime library etc. if the inferior
6784 isn't actually running. target_enable_exception_callback for a
6785 null target ops vector gives an undesirable error message, so we
6786 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6787 exceptions are supported in this way, it's OK for now. FIXME */
6788 if (ep_is_exception_catchpoint (bpt
) && target_has_execution
)
6790 /* Format possible error msg */
6791 char *message
= xstrprintf ("Error in deleting catchpoint %d:\n",
6793 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
6794 args_for_catchpoint_enable args
;
6795 args
.kind
= bpt
->type
== bp_catch_catch
?
6796 EX_EVENT_CATCH
: EX_EVENT_THROW
;
6798 catch_errors (cover_target_enable_exception_callback
, &args
,
6799 message
, RETURN_MASK_ALL
);
6800 do_cleanups (cleanups
);
6807 b
->next
= bpt
->next
;
6811 ALL_BP_LOCATIONS (loc
)
6812 if (loc
->next
== bpt
->loc
)
6814 loc
->next
= bpt
->loc
->next
;
6818 check_duplicates (bpt
);
6819 /* If this breakpoint was inserted, and there is another breakpoint
6820 at the same address, we need to insert the other breakpoint. */
6821 if (bpt
->loc
->inserted
6822 && bpt
->type
!= bp_hardware_watchpoint
6823 && bpt
->type
!= bp_read_watchpoint
6824 && bpt
->type
!= bp_access_watchpoint
6825 && bpt
->type
!= bp_catch_fork
6826 && bpt
->type
!= bp_catch_vfork
6827 && bpt
->type
!= bp_catch_exec
)
6830 if (b
->loc
->address
== bpt
->loc
->address
6831 && b
->loc
->section
== bpt
->loc
->section
6832 && !b
->loc
->duplicate
6833 && b
->enable_state
!= bp_disabled
6834 && b
->enable_state
!= bp_shlib_disabled
6836 && b
->enable_state
!= bp_call_disabled
)
6840 /* We should never reach this point if there is a permanent
6841 breakpoint at the same address as the one being deleted.
6842 If there is a permanent breakpoint somewhere, it should
6843 always be the only one inserted. */
6844 if (b
->enable_state
== bp_permanent
)
6845 internal_error (__FILE__
, __LINE__
,
6846 _("another breakpoint was inserted on top of "
6847 "a permanent breakpoint"));
6849 if (b
->type
== bp_hardware_breakpoint
)
6850 val
= target_insert_hw_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
6852 val
= target_insert_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
6854 /* If there was an error in the insert, print a message, then stop execution. */
6857 struct ui_file
*tmp_error_stream
= mem_fileopen ();
6858 make_cleanup_ui_file_delete (tmp_error_stream
);
6861 if (b
->type
== bp_hardware_breakpoint
)
6863 fprintf_unfiltered (tmp_error_stream
,
6864 "Cannot insert hardware breakpoint %d.\n"
6865 "You may have requested too many hardware breakpoints.\n",
6870 fprintf_unfiltered (tmp_error_stream
, "Cannot insert breakpoint %d.\n", b
->number
);
6871 fprintf_filtered (tmp_error_stream
, "Error accessing memory address ");
6872 deprecated_print_address_numeric (b
->loc
->address
, 1, tmp_error_stream
);
6873 fprintf_filtered (tmp_error_stream
, ": %s.\n",
6874 safe_strerror (val
));
6877 fprintf_unfiltered (tmp_error_stream
,"The same program may be running in another process.");
6878 target_terminal_ours_for_output ();
6879 error_stream(tmp_error_stream
);
6882 b
->loc
->inserted
= 1;
6886 free_command_lines (&bpt
->commands
);
6889 if (bpt
->cond_string
!= NULL
)
6890 xfree (bpt
->cond_string
);
6891 if (bpt
->addr_string
!= NULL
)
6892 xfree (bpt
->addr_string
);
6893 if (bpt
->exp
!= NULL
)
6895 if (bpt
->exp_string
!= NULL
)
6896 xfree (bpt
->exp_string
);
6897 if (bpt
->val
!= NULL
)
6898 value_free (bpt
->val
);
6899 if (bpt
->source_file
!= NULL
)
6900 xfree (bpt
->source_file
);
6901 if (bpt
->dll_pathname
!= NULL
)
6902 xfree (bpt
->dll_pathname
);
6903 if (bpt
->triggered_dll_pathname
!= NULL
)
6904 xfree (bpt
->triggered_dll_pathname
);
6905 if (bpt
->exec_pathname
!= NULL
)
6906 xfree (bpt
->exec_pathname
);
6908 /* Be sure no bpstat's are pointing at it after it's been freed. */
6909 /* FIXME, how can we find all bpstat's?
6910 We just check stop_bpstat for now. */
6911 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
6912 if (bs
->breakpoint_at
== bpt
)
6914 bs
->breakpoint_at
= NULL
;
6916 /* bs->commands will be freed later. */
6918 /* On the chance that someone will soon try again to delete this same
6919 bp, we mark it as deleted before freeing its storage. */
6920 bpt
->type
= bp_none
;
6927 do_delete_breakpoint_cleanup (void *b
)
6929 delete_breakpoint (b
);
6933 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
6935 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
6939 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
6941 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
6945 delete_command (char *arg
, int from_tty
)
6947 struct breakpoint
*b
, *temp
;
6953 int breaks_to_delete
= 0;
6955 /* Delete all breakpoints if no argument.
6956 Do not delete internal or call-dummy breakpoints, these
6957 have to be deleted with an explicit breakpoint number argument. */
6960 if (b
->type
!= bp_call_dummy
&&
6961 b
->type
!= bp_shlib_event
&&
6962 b
->type
!= bp_thread_event
&&
6963 b
->type
!= bp_overlay_event
&&
6965 breaks_to_delete
= 1;
6968 /* Ask user only if there are some breakpoints to delete. */
6970 || (breaks_to_delete
&& query (_("Delete all breakpoints? "))))
6972 ALL_BREAKPOINTS_SAFE (b
, temp
)
6974 if (b
->type
!= bp_call_dummy
&&
6975 b
->type
!= bp_shlib_event
&&
6976 b
->type
!= bp_thread_event
&&
6977 b
->type
!= bp_overlay_event
&&
6979 delete_breakpoint (b
);
6984 map_breakpoint_numbers (arg
, delete_breakpoint
);
6987 /* Reset a breakpoint given it's struct breakpoint * BINT.
6988 The value we return ends up being the return value from catch_errors.
6989 Unused in this case. */
6992 breakpoint_re_set_one (void *bint
)
6994 /* get past catch_errs */
6995 struct breakpoint
*b
= (struct breakpoint
*) bint
;
6999 int *not_found_ptr
= NULL
;
7000 struct symtabs_and_lines sals
;
7002 enum enable_state save_enable
;
7007 warning (_("attempted to reset apparently deleted breakpoint #%d?"),
7011 case bp_hardware_breakpoint
:
7013 case bp_catch_unload
:
7014 if (b
->addr_string
== NULL
)
7016 /* Anything without a string can't be re-set. */
7017 delete_breakpoint (b
);
7020 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
7022 ``And a hack it is, although Apple's Darwin version of GDB
7023 contains an almost identical hack to implement a "future
7024 break" command. It seems to work in many real world cases,
7025 but it is easy to come up with a test case where the patch
7026 doesn't help at all.''
7028 ``It seems that the way GDB implements breakpoints - in -
7029 shared - libraries was designed for a.out shared library
7030 systems (SunOS 4) where shared libraries were loaded at a
7031 fixed address in memory. Since ELF shared libraries can (and
7032 will) be loaded at any address in memory, things break.
7033 Fixing this is not trivial. Therefore, I'm not sure whether
7034 we should add this hack to the branch only. I cannot
7035 guarantee that things will be fixed on the trunk in the near
7038 In case we have a problem, disable this breakpoint. We'll
7039 restore its status if we succeed. Don't disable a
7040 shlib_disabled breakpoint though. There's a fair chance we
7041 can't re-set it if the shared library it's in hasn't been
7047 save_enable
= b
->enable_state
;
7048 if (b
->enable_state
!= bp_shlib_disabled
)
7049 b
->enable_state
= bp_disabled
;
7051 /* If resetting a shlib-disabled breakpoint, we don't want to
7052 see an error message if it is not found since we will expect
7053 this to occur until the shared library is finally reloaded.
7054 We accomplish this by giving decode_line_1 a pointer to use
7055 for silent notification that the symbol is not found. */
7056 not_found_ptr
= ¬_found
;
7058 set_language (b
->language
);
7059 input_radix
= b
->input_radix
;
7061 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
,
7063 for (i
= 0; i
< sals
.nelts
; i
++)
7065 resolve_sal_pc (&sals
.sals
[i
]);
7067 /* Reparse conditions, they might contain references to the
7069 if (b
->cond_string
!= NULL
)
7075 /* Avoid re-freeing b->exp if an error during the call
7079 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
7082 /* We need to re-set the breakpoint if the address changes... */
7083 if (b
->loc
->address
!= sals
.sals
[i
].pc
7084 /* ...or new and old breakpoints both have source files, and
7085 the source file name or the line number changes... */
7086 || (b
->source_file
!= NULL
7087 && sals
.sals
[i
].symtab
!= NULL
7088 && (strcmp (b
->source_file
, sals
.sals
[i
].symtab
->filename
) != 0
7089 || b
->line_number
!= sals
.sals
[i
].line
)
7091 /* ...or we switch between having a source file and not having
7093 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
7096 if (b
->source_file
!= NULL
)
7097 xfree (b
->source_file
);
7098 if (sals
.sals
[i
].symtab
== NULL
)
7099 b
->source_file
= NULL
;
7102 savestring (sals
.sals
[i
].symtab
->filename
,
7103 strlen (sals
.sals
[i
].symtab
->filename
));
7104 b
->line_number
= sals
.sals
[i
].line
;
7105 b
->loc
->requested_address
= sals
.sals
[i
].pc
;
7107 = adjust_breakpoint_address (b
->loc
->requested_address
,
7110 /* Used to check for duplicates here, but that can
7111 cause trouble, as it doesn't check for disabled
7116 /* Might be better to do this just once per breakpoint_re_set,
7117 rather than once for every breakpoint. */
7118 breakpoints_changed ();
7120 b
->loc
->section
= sals
.sals
[i
].section
;
7121 b
->enable_state
= save_enable
; /* Restore it, this worked. */
7124 /* Now that this is re-enabled, check_duplicates
7126 check_duplicates (b
);
7133 case bp_hardware_watchpoint
:
7134 case bp_read_watchpoint
:
7135 case bp_access_watchpoint
:
7136 innermost_block
= NULL
;
7137 /* The issue arises of what context to evaluate this in. The
7138 same one as when it was set, but what does that mean when
7139 symbols have been re-read? We could save the filename and
7140 functionname, but if the context is more local than that, the
7141 best we could do would be something like how many levels deep
7142 and which index at that particular level, but that's going to
7143 be less stable than filenames or function names. */
7145 /* So for now, just use a global context. */
7149 /* Avoid re-freeing b->exp if an error during the call to
7150 parse_expression. */
7153 b
->exp
= parse_expression (b
->exp_string
);
7154 b
->exp_valid_block
= innermost_block
;
7155 mark
= value_mark ();
7158 value_free (b
->val
);
7159 /* Avoid re-freeing b->val if an error during the call to
7160 evaluate_expression. */
7163 b
->val
= evaluate_expression (b
->exp
);
7164 release_value (b
->val
);
7165 if (value_lazy (b
->val
) && breakpoint_enabled (b
))
7166 value_fetch_lazy (b
->val
);
7168 if (b
->cond_string
!= NULL
)
7174 /* Avoid re-freeing b->exp if an error during the call
7178 b
->cond
= parse_exp_1 (&s
, (struct block
*) 0, 0);
7180 if (breakpoint_enabled (b
))
7182 value_free_to_mark (mark
);
7184 case bp_catch_catch
:
7185 case bp_catch_throw
:
7187 /* We needn't really do anything to reset these, since the mask
7188 that requests them is unaffected by e.g., new libraries being
7191 case bp_catch_vfork
:
7196 printf_filtered (_("Deleting unknown breakpoint type %d\n"), b
->type
);
7198 /* Delete longjmp and overlay event breakpoints; they will be
7199 reset later by breakpoint_re_set. */
7201 case bp_longjmp_resume
:
7202 case bp_overlay_event
:
7203 delete_breakpoint (b
);
7206 /* This breakpoint is special, it's set up when the inferior
7207 starts and we really don't want to touch it. */
7208 case bp_shlib_event
:
7210 /* Like bp_shlib_event, this breakpoint type is special.
7211 Once it is set up, we do not want to touch it. */
7212 case bp_thread_event
:
7214 /* Keep temporary breakpoints, which can be encountered when we step
7215 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7216 Otherwise these should have been blown away via the cleanup chain
7217 or by breakpoint_init_inferior when we rerun the executable. */
7220 case bp_watchpoint_scope
:
7222 case bp_step_resume
:
7229 /* Re-set all breakpoints after symbols have been re-loaded. */
7231 breakpoint_re_set (void)
7233 struct breakpoint
*b
, *temp
;
7234 enum language save_language
;
7235 int save_input_radix
;
7237 save_language
= current_language
->la_language
;
7238 save_input_radix
= input_radix
;
7239 ALL_BREAKPOINTS_SAFE (b
, temp
)
7241 /* Format possible error msg */
7242 char *message
= xstrprintf ("Error in re-setting breakpoint %d:\n",
7244 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7245 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7246 do_cleanups (cleanups
);
7248 set_language (save_language
);
7249 input_radix
= save_input_radix
;
7251 if (GET_LONGJMP_TARGET_P ())
7253 create_longjmp_breakpoint ("longjmp");
7254 create_longjmp_breakpoint ("_longjmp");
7255 create_longjmp_breakpoint ("siglongjmp");
7256 create_longjmp_breakpoint ("_siglongjmp");
7257 create_longjmp_breakpoint (NULL
);
7260 create_overlay_event_breakpoint ("_ovly_debug_event");
7263 /* Reset the thread number of this breakpoint:
7265 - If the breakpoint is for all threads, leave it as-is.
7266 - Else, reset it to the current thread for inferior_ptid. */
7268 breakpoint_re_set_thread (struct breakpoint
*b
)
7270 if (b
->thread
!= -1)
7272 if (in_thread_list (inferior_ptid
))
7273 b
->thread
= pid_to_thread_id (inferior_ptid
);
7277 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7278 If from_tty is nonzero, it prints a message to that effect,
7279 which ends with a period (no newline). */
7282 set_ignore_count (int bptnum
, int count
, int from_tty
)
7284 struct breakpoint
*b
;
7290 if (b
->number
== bptnum
)
7292 b
->ignore_count
= count
;
7296 printf_filtered (_("Will stop next time breakpoint %d is reached."),
7298 else if (count
== 1)
7299 printf_filtered (_("Will ignore next crossing of breakpoint %d."),
7302 printf_filtered (_("Will ignore next %d crossings of breakpoint %d."),
7305 breakpoints_changed ();
7306 breakpoint_modify_event (b
->number
);
7310 error (_("No breakpoint number %d."), bptnum
);
7313 /* Clear the ignore counts of all breakpoints. */
7315 breakpoint_clear_ignore_counts (void)
7317 struct breakpoint
*b
;
7320 b
->ignore_count
= 0;
7323 /* Command to set ignore-count of breakpoint N to COUNT. */
7326 ignore_command (char *args
, int from_tty
)
7332 error_no_arg (_("a breakpoint number"));
7334 num
= get_number (&p
);
7336 error (_("bad breakpoint number: '%s'"), args
);
7338 error (_("Second argument (specified ignore-count) is missing."));
7340 set_ignore_count (num
,
7341 longest_to_int (value_as_long (parse_and_eval (p
))),
7344 printf_filtered ("\n");
7347 /* Call FUNCTION on each of the breakpoints
7348 whose numbers are given in ARGS. */
7351 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7356 struct breakpoint
*b
, *tmp
;
7360 error_no_arg (_("one or more breakpoint numbers"));
7367 num
= get_number_or_range (&p1
);
7370 warning (_("bad breakpoint number at or near '%s'"), p
);
7374 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7375 if (b
->number
== num
)
7377 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7380 if (related_breakpoint
)
7381 function (related_breakpoint
);
7385 printf_unfiltered (_("No breakpoint number %d.\n"), num
);
7391 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7392 If from_tty is nonzero, it prints a message to that effect,
7393 which ends with a period (no newline). */
7396 disable_breakpoint (struct breakpoint
*bpt
)
7398 /* Never disable a watchpoint scope breakpoint; we want to
7399 hit them when we leave scope so we can delete both the
7400 watchpoint and its scope breakpoint at that time. */
7401 if (bpt
->type
== bp_watchpoint_scope
)
7404 /* You can't disable permanent breakpoints. */
7405 if (bpt
->enable_state
== bp_permanent
)
7408 bpt
->enable_state
= bp_disabled
;
7410 check_duplicates (bpt
);
7412 if (deprecated_modify_breakpoint_hook
)
7413 deprecated_modify_breakpoint_hook (bpt
);
7414 breakpoint_modify_event (bpt
->number
);
7418 disable_command (char *args
, int from_tty
)
7420 struct breakpoint
*bpt
;
7422 ALL_BREAKPOINTS (bpt
)
7426 warning (_("attempted to disable apparently deleted breakpoint #%d?"),
7431 case bp_catch_unload
:
7433 case bp_catch_vfork
:
7435 case bp_catch_catch
:
7436 case bp_catch_throw
:
7437 case bp_hardware_breakpoint
:
7439 case bp_hardware_watchpoint
:
7440 case bp_read_watchpoint
:
7441 case bp_access_watchpoint
:
7442 disable_breakpoint (bpt
);
7447 map_breakpoint_numbers (args
, disable_breakpoint
);
7451 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7453 int target_resources_ok
, other_type_used
;
7456 if (bpt
->type
== bp_hardware_breakpoint
)
7459 i
= hw_breakpoint_used_count ();
7460 target_resources_ok
=
7461 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7463 if (target_resources_ok
== 0)
7464 error (_("No hardware breakpoint support in the target."));
7465 else if (target_resources_ok
< 0)
7466 error (_("Hardware breakpoints used exceeds limit."));
7471 if (bpt
->enable_state
!= bp_enabled
)
7473 /* When enabling a pending breakpoint, we need to check if the breakpoint
7474 is resolvable since shared libraries could have been loaded
7475 after the breakpoint was disabled. */
7476 breakpoints_changed ();
7477 if (resolve_pending_breakpoint (bpt
) == GDB_RC_OK
)
7479 delete_breakpoint (bpt
);
7482 bpt
->enable_state
= bp_enabled
;
7483 bpt
->disposition
= disposition
;
7486 else /* Not a pending breakpoint. */
7488 if (bpt
->enable_state
!= bp_permanent
)
7489 bpt
->enable_state
= bp_enabled
;
7490 bpt
->disposition
= disposition
;
7491 check_duplicates (bpt
);
7492 breakpoints_changed ();
7494 if (bpt
->type
== bp_watchpoint
||
7495 bpt
->type
== bp_hardware_watchpoint
||
7496 bpt
->type
== bp_read_watchpoint
||
7497 bpt
->type
== bp_access_watchpoint
)
7499 struct frame_id saved_frame_id
;
7501 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
7502 if (bpt
->exp_valid_block
!= NULL
)
7504 struct frame_info
*fr
=
7505 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7508 printf_filtered (_("\
7509 Cannot enable watchpoint %d because the block in which its expression\n\
7510 is valid is not currently in scope.\n"), bpt
->number
);
7511 bpt
->enable_state
= bp_disabled
;
7517 value_free (bpt
->val
);
7518 mark
= value_mark ();
7519 bpt
->val
= evaluate_expression (bpt
->exp
);
7520 release_value (bpt
->val
);
7521 if (value_lazy (bpt
->val
))
7522 value_fetch_lazy (bpt
->val
);
7524 if (bpt
->type
== bp_hardware_watchpoint
||
7525 bpt
->type
== bp_read_watchpoint
||
7526 bpt
->type
== bp_access_watchpoint
)
7528 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7529 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7531 /* Hack around 'unused var' error for some targets here */
7533 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7534 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7535 /* we can consider of type is bp_hardware_watchpoint, convert to
7536 bp_watchpoint in the following condition */
7537 if (target_resources_ok
< 0)
7539 printf_filtered (_("\
7540 Cannot enable watchpoint %d because target watch resources\n\
7541 have been allocated for other watchpoints.\n"), bpt
->number
);
7542 bpt
->enable_state
= bp_disabled
;
7543 value_free_to_mark (mark
);
7548 select_frame (frame_find_by_id (saved_frame_id
));
7549 value_free_to_mark (mark
);
7553 if (deprecated_modify_breakpoint_hook
)
7554 deprecated_modify_breakpoint_hook (bpt
);
7555 breakpoint_modify_event (bpt
->number
);
7559 enable_breakpoint (struct breakpoint
*bpt
)
7561 do_enable_breakpoint (bpt
, bpt
->disposition
);
7564 /* The enable command enables the specified breakpoints (or all defined
7565 breakpoints) so they once again become (or continue to be) effective
7566 in stopping the inferior. */
7569 enable_command (char *args
, int from_tty
)
7571 struct breakpoint
*bpt
;
7573 ALL_BREAKPOINTS (bpt
)
7577 warning (_("attempted to enable apparently deleted breakpoint #%d?"),
7582 case bp_catch_unload
:
7584 case bp_catch_vfork
:
7586 case bp_catch_catch
:
7587 case bp_catch_throw
:
7588 case bp_hardware_breakpoint
:
7590 case bp_hardware_watchpoint
:
7591 case bp_read_watchpoint
:
7592 case bp_access_watchpoint
:
7593 enable_breakpoint (bpt
);
7598 map_breakpoint_numbers (args
, enable_breakpoint
);
7602 enable_once_breakpoint (struct breakpoint
*bpt
)
7604 do_enable_breakpoint (bpt
, disp_disable
);
7608 enable_once_command (char *args
, int from_tty
)
7610 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7614 enable_delete_breakpoint (struct breakpoint
*bpt
)
7616 do_enable_breakpoint (bpt
, disp_del
);
7620 enable_delete_command (char *args
, int from_tty
)
7622 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7626 set_breakpoint_cmd (char *args
, int from_tty
)
7631 show_breakpoint_cmd (char *args
, int from_tty
)
7635 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7637 struct symtabs_and_lines
7638 decode_line_spec_1 (char *string
, int funfirstline
)
7640 struct symtabs_and_lines sals
;
7642 error (_("Empty line specification."));
7643 if (default_breakpoint_valid
)
7644 sals
= decode_line_1 (&string
, funfirstline
,
7645 default_breakpoint_symtab
,
7646 default_breakpoint_line
,
7647 (char ***) NULL
, NULL
);
7649 sals
= decode_line_1 (&string
, funfirstline
,
7650 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
7652 error (_("Junk at end of line specification: %s"), string
);
7656 /* This help string is used for the break, hbreak, tbreak and thbreak commands.
7657 It is defined as a macro to prevent duplication.
7658 COMMAND should be a string constant containing the name of the command. */
7659 #define BREAK_ARGS_HELP(command) \
7660 command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\
7661 LOCATION may be a line number, function name, or \"*\" and an address.\n\
7662 If a line number is specified, break at start of code for that line.\n\
7663 If a function is specified, break at start of code for that function.\n\
7664 If an address is specified, break at that exact address.\n\
7665 With no LOCATION, uses current execution address of selected stack frame.\n\
7666 This is useful for breaking on return to a stack frame.\n\
7668 THREADNUM is the number from \"info threads\".\n\
7669 CONDITION is a boolean expression.\n\
7671 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7673 Do \"help breakpoints\" for info on other commands dealing with breakpoints."
7676 _initialize_breakpoint (void)
7678 static struct cmd_list_element
*breakpoint_set_cmdlist
;
7679 static struct cmd_list_element
*breakpoint_show_cmdlist
;
7680 struct cmd_list_element
*c
;
7682 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
7684 breakpoint_chain
= 0;
7685 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7686 before a breakpoint is set. */
7687 breakpoint_count
= 0;
7689 add_com ("ignore", class_breakpoint
, ignore_command
, _("\
7690 Set ignore-count of breakpoint number N to COUNT.\n\
7691 Usage is `ignore N COUNT'."));
7693 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
7695 add_com ("commands", class_breakpoint
, commands_command
, _("\
7696 Set commands to be executed when a breakpoint is hit.\n\
7697 Give breakpoint number as argument after \"commands\".\n\
7698 With no argument, the targeted breakpoint is the last one set.\n\
7699 The commands themselves follow starting on the next line.\n\
7700 Type a line containing \"end\" to indicate the end of them.\n\
7701 Give \"silent\" as the first line to make the breakpoint silent;\n\
7702 then no output is printed when it is hit, except what the commands print."));
7704 add_com ("condition", class_breakpoint
, condition_command
, _("\
7705 Specify breakpoint number N to break only if COND is true.\n\
7706 Usage is `condition N COND', where N is an integer and COND is an\n\
7707 expression to be evaluated whenever breakpoint N is reached."));
7709 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
, _("\
7710 Set a temporary breakpoint.\n\
7711 Like \"break\" except the breakpoint is only temporary,\n\
7712 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7713 by using \"enable delete\" on the breakpoint number.\n\
7715 BREAK_ARGS_HELP ("tbreak")));
7716 set_cmd_completer (c
, location_completer
);
7718 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
, _("\
7719 Set a hardware assisted breakpoint.\n\
7720 Like \"break\" except the breakpoint requires hardware support,\n\
7721 some target hardware may not have this support.\n\
7723 BREAK_ARGS_HELP ("hbreak")));
7724 set_cmd_completer (c
, location_completer
);
7726 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
, _("\
7727 Set a temporary hardware assisted breakpoint.\n\
7728 Like \"hbreak\" except the breakpoint is only temporary,\n\
7729 so it will be deleted when hit.\n\
7731 BREAK_ARGS_HELP ("thbreak")));
7732 set_cmd_completer (c
, location_completer
);
7734 add_prefix_cmd ("enable", class_breakpoint
, enable_command
, _("\
7735 Enable some breakpoints.\n\
7736 Give breakpoint numbers (separated by spaces) as arguments.\n\
7737 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7738 This is used to cancel the effect of the \"disable\" command.\n\
7739 With a subcommand you can enable temporarily."),
7740 &enablelist
, "enable ", 1, &cmdlist
);
7742 add_com ("ab", class_breakpoint
, enable_command
, _("\
7743 Enable some breakpoints.\n\
7744 Give breakpoint numbers (separated by spaces) as arguments.\n\
7745 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7746 This is used to cancel the effect of the \"disable\" command.\n\
7747 With a subcommand you can enable temporarily."));
7749 add_com_alias ("en", "enable", class_breakpoint
, 1);
7751 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
, _("\
7752 Enable some breakpoints.\n\
7753 Give breakpoint numbers (separated by spaces) as arguments.\n\
7754 This is used to cancel the effect of the \"disable\" command.\n\
7755 May be abbreviated to simply \"enable\".\n"),
7756 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
7758 add_cmd ("once", no_class
, enable_once_command
, _("\
7759 Enable breakpoints for one hit. Give breakpoint numbers.\n\
7760 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
7763 add_cmd ("delete", no_class
, enable_delete_command
, _("\
7764 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7765 If a breakpoint is hit while enabled in this fashion, it is deleted."),
7768 add_cmd ("delete", no_class
, enable_delete_command
, _("\
7769 Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7770 If a breakpoint is hit while enabled in this fashion, it is deleted."),
7773 add_cmd ("once", no_class
, enable_once_command
, _("\
7774 Enable breakpoints for one hit. Give breakpoint numbers.\n\
7775 If a breakpoint is hit while enabled in this fashion, it becomes disabled."),
7778 add_prefix_cmd ("disable", class_breakpoint
, disable_command
, _("\
7779 Disable some breakpoints.\n\
7780 Arguments are breakpoint numbers with spaces in between.\n\
7781 To disable all breakpoints, give no argument.\n\
7782 A disabled breakpoint is not forgotten, but has no effect until reenabled."),
7783 &disablelist
, "disable ", 1, &cmdlist
);
7784 add_com_alias ("dis", "disable", class_breakpoint
, 1);
7785 add_com_alias ("disa", "disable", class_breakpoint
, 1);
7787 add_com ("sb", class_breakpoint
, disable_command
, _("\
7788 Disable some breakpoints.\n\
7789 Arguments are breakpoint numbers with spaces in between.\n\
7790 To disable all breakpoints, give no argument.\n\
7791 A disabled breakpoint is not forgotten, but has no effect until reenabled."));
7793 add_cmd ("breakpoints", class_alias
, disable_command
, _("\
7794 Disable some breakpoints.\n\
7795 Arguments are breakpoint numbers with spaces in between.\n\
7796 To disable all breakpoints, give no argument.\n\
7797 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7798 This command may be abbreviated \"disable\"."),
7801 add_prefix_cmd ("delete", class_breakpoint
, delete_command
, _("\
7802 Delete some breakpoints or auto-display expressions.\n\
7803 Arguments are breakpoint numbers with spaces in between.\n\
7804 To delete all breakpoints, give no argument.\n\
7806 Also a prefix command for deletion of other GDB objects.\n\
7807 The \"unset\" command is also an alias for \"delete\"."),
7808 &deletelist
, "delete ", 1, &cmdlist
);
7809 add_com_alias ("d", "delete", class_breakpoint
, 1);
7811 add_com ("db", class_breakpoint
, delete_command
, _("\
7812 Delete some breakpoints.\n\
7813 Arguments are breakpoint numbers with spaces in between.\n\
7814 To delete all breakpoints, give no argument.\n"));
7816 add_cmd ("breakpoints", class_alias
, delete_command
, _("\
7817 Delete some breakpoints or auto-display expressions.\n\
7818 Arguments are breakpoint numbers with spaces in between.\n\
7819 To delete all breakpoints, give no argument.\n\
7820 This command may be abbreviated \"delete\"."),
7823 add_com ("clear", class_breakpoint
, clear_command
, _("\
7824 Clear breakpoint at specified line or function.\n\
7825 Argument may be line number, function name, or \"*\" and an address.\n\
7826 If line number is specified, all breakpoints in that line are cleared.\n\
7827 If function is specified, breakpoints at beginning of function are cleared.\n\
7828 If an address is specified, breakpoints at that address are cleared.\n\
7830 With no argument, clears all breakpoints in the line that the selected frame\n\
7833 See also the \"delete\" command which clears breakpoints by number."));
7835 c
= add_com ("break", class_breakpoint
, break_command
, _("\
7836 Set breakpoint at specified line or function.\n"
7837 BREAK_ARGS_HELP ("break")));
7838 set_cmd_completer (c
, location_completer
);
7840 add_com_alias ("b", "break", class_run
, 1);
7841 add_com_alias ("br", "break", class_run
, 1);
7842 add_com_alias ("bre", "break", class_run
, 1);
7843 add_com_alias ("brea", "break", class_run
, 1);
7847 add_com_alias ("ba", "break", class_breakpoint
, 1);
7848 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
7853 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
, _("\
7854 Break in function/address or break at a line in the current file."),
7855 &stoplist
, "stop ", 1, &cmdlist
);
7856 add_cmd ("in", class_breakpoint
, stopin_command
,
7857 _("Break in function or address."), &stoplist
);
7858 add_cmd ("at", class_breakpoint
, stopat_command
,
7859 _("Break at a line in the current file."), &stoplist
);
7860 add_com ("status", class_info
, breakpoints_info
, _("\
7861 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7862 The \"Type\" column indicates one of:\n\
7863 \tbreakpoint - normal breakpoint\n\
7864 \twatchpoint - watchpoint\n\
7865 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7866 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7867 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7868 address and file/line number respectively.\n\
7870 Convenience variable \"$_\" and default examine address for \"x\"\n\
7871 are set to the address of the last breakpoint listed.\n\n\
7872 Convenience variable \"$bpnum\" contains the number of the last\n\
7876 add_info ("breakpoints", breakpoints_info
, _("\
7877 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7878 The \"Type\" column indicates one of:\n\
7879 \tbreakpoint - normal breakpoint\n\
7880 \twatchpoint - watchpoint\n\
7881 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7882 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7883 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7884 address and file/line number respectively.\n\
7886 Convenience variable \"$_\" and default examine address for \"x\"\n\
7887 are set to the address of the last breakpoint listed.\n\n\
7888 Convenience variable \"$bpnum\" contains the number of the last\n\
7892 add_com ("lb", class_breakpoint
, breakpoints_info
, _("\
7893 Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7894 The \"Type\" column indicates one of:\n\
7895 \tbreakpoint - normal breakpoint\n\
7896 \twatchpoint - watchpoint\n\
7897 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7898 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7899 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7900 address and file/line number respectively.\n\
7902 Convenience variable \"$_\" and default examine address for \"x\"\n\
7903 are set to the address of the last breakpoint listed.\n\n\
7904 Convenience variable \"$bpnum\" contains the number of the last\n\
7907 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
, _("\
7908 Status of all breakpoints, or breakpoint number NUMBER.\n\
7909 The \"Type\" column indicates one of:\n\
7910 \tbreakpoint - normal breakpoint\n\
7911 \twatchpoint - watchpoint\n\
7912 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7913 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7914 \tuntil - internal breakpoint used by the \"until\" command\n\
7915 \tfinish - internal breakpoint used by the \"finish\" command\n\
7916 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7917 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7918 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7919 address and file/line number respectively.\n\
7921 Convenience variable \"$_\" and default examine address for \"x\"\n\
7922 are set to the address of the last breakpoint listed.\n\
7924 Convenience variable \"$bpnum\" contains the number of the last\n\
7926 &maintenanceinfolist
);
7928 add_com ("catch", class_breakpoint
, catch_command
, _("\
7929 Set catchpoints to catch events.\n\
7930 Raised signals may be caught:\n\
7931 \tcatch signal - all signals\n\
7932 \tcatch signal <signame> - a particular signal\n\
7933 Raised exceptions may be caught:\n\
7934 \tcatch throw - all exceptions, when thrown\n\
7935 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7936 \tcatch catch - all exceptions, when caught\n\
7937 \tcatch catch <exceptname> - a particular exception, when caught\n\
7938 Thread or process events may be caught:\n\
7939 \tcatch thread_start - any threads, just after creation\n\
7940 \tcatch thread_exit - any threads, just before expiration\n\
7941 \tcatch thread_join - any threads, just after joins\n\
7942 Process events may be caught:\n\
7943 \tcatch start - any processes, just after creation\n\
7944 \tcatch exit - any processes, just before expiration\n\
7945 \tcatch fork - calls to fork()\n\
7946 \tcatch vfork - calls to vfork()\n\
7947 \tcatch exec - calls to exec()\n\
7948 Dynamically-linked library events may be caught:\n\
7949 \tcatch load - loads of any library\n\
7950 \tcatch load <libname> - loads of a particular library\n\
7951 \tcatch unload - unloads of any library\n\
7952 \tcatch unload <libname> - unloads of a particular library\n\
7953 The act of your program's execution stopping may also be caught:\n\
7955 C++ exceptions may be caught:\n\
7956 \tcatch throw - all exceptions, when thrown\n\
7957 \tcatch catch - all exceptions, when caught\n\
7959 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7960 after a fork or vfork is caught.\n\n\
7961 Do \"help breakpoints\" for info on other commands dealing with breakpoints."));
7963 add_com ("tcatch", class_breakpoint
, tcatch_command
, _("\
7964 Set temporary catchpoints to catch events.\n\
7965 Args like \"catch\" command.\n\
7966 Like \"catch\" except the catchpoint is only temporary,\n\
7967 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7968 by using \"enable delete\" on the catchpoint number."));
7970 c
= add_com ("watch", class_breakpoint
, watch_command
, _("\
7971 Set a watchpoint for an expression.\n\
7972 A watchpoint stops execution of your program whenever the value of\n\
7973 an expression changes."));
7974 set_cmd_completer (c
, location_completer
);
7976 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
, _("\
7977 Set a read watchpoint for an expression.\n\
7978 A watchpoint stops execution of your program whenever the value of\n\
7979 an expression is read."));
7980 set_cmd_completer (c
, location_completer
);
7982 c
= add_com ("awatch", class_breakpoint
, awatch_command
, _("\
7983 Set a watchpoint for an expression.\n\
7984 A watchpoint stops execution of your program whenever the value of\n\
7985 an expression is either read or written."));
7986 set_cmd_completer (c
, location_completer
);
7988 add_info ("watchpoints", breakpoints_info
,
7989 _("Synonym for ``info breakpoints''."));
7992 /* XXX: cagney/2005-02-23: This should be a boolean, and should
7993 respond to changes - contrary to the description. */
7994 add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support
,
7995 &can_use_hw_watchpoints
, _("\
7996 Set debugger's willingness to use watchpoint hardware."), _("\
7997 Show debugger's willingness to use watchpoint hardware."), _("\
7998 If zero, gdb will not use hardware for new watchpoints, even if\n\
7999 such is available. (However, any hardware watchpoints that were\n\
8000 created before setting this to nonzero, will continue to use watchpoint\n\
8003 show_can_use_hw_watchpoints
,
8004 &setlist
, &showlist
);
8006 can_use_hw_watchpoints
= 1;
8008 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, _("\
8009 Breakpoint specific settings\n\
8010 Configure various breakpoint-specific variables such as\n\
8011 pending breakpoint behavior"),
8012 &breakpoint_set_cmdlist
, "set breakpoint ",
8013 0/*allow-unknown*/, &setlist
);
8014 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, _("\
8015 Breakpoint specific settings\n\
8016 Configure various breakpoint-specific variables such as\n\
8017 pending breakpoint behavior"),
8018 &breakpoint_show_cmdlist
, "show breakpoint ",
8019 0/*allow-unknown*/, &showlist
);
8021 add_setshow_auto_boolean_cmd ("pending", no_class
,
8022 &pending_break_support
, _("\
8023 Set debugger's behavior regarding pending breakpoints."), _("\
8024 Show debugger's behavior regarding pending breakpoints."), _("\
8025 If on, an unrecognized breakpoint location will cause gdb to create a\n\
8026 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
8027 an error. If auto, an unrecognized breakpoint location results in a\n\
8028 user-query to see if a pending breakpoint should be created."),
8030 show_pending_break_support
,
8031 &breakpoint_set_cmdlist
,
8032 &breakpoint_show_cmdlist
);
8034 pending_break_support
= AUTO_BOOLEAN_AUTO
;