1 /* Everything about breakpoints, for GDB.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
28 #include "breakpoint.h"
30 #include "expression.h"
36 #include "gdbthread.h"
39 #include "gdb_string.h"
46 #include "completer.h"
49 #include "cli/cli-script.h"
50 #include "gdb_assert.h"
55 #include "gdb-events.h"
57 /* Prototypes for local functions. */
59 static void until_break_command_continuation (struct continuation_arg
*arg
);
61 static void catch_command_1 (char *, int, int);
63 static void enable_delete_command (char *, int);
65 static void enable_delete_breakpoint (struct breakpoint
*);
67 static void enable_once_command (char *, int);
69 static void enable_once_breakpoint (struct breakpoint
*);
71 static void disable_command (char *, int);
73 static void enable_command (char *, int);
75 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
77 static void ignore_command (char *, int);
79 static int breakpoint_re_set_one (void *);
81 static void clear_command (char *, int);
83 static void catch_command (char *, int);
85 static void watch_command (char *, int);
87 static int can_use_hardware_watchpoint (struct value
*);
89 static int break_command_1 (char *, int, int, struct breakpoint
*);
91 static void mention (struct breakpoint
*);
93 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
95 static void check_duplicates (struct breakpoint
*);
97 static void breakpoint_adjustment_warning (CORE_ADDR
, CORE_ADDR
, int, int);
99 static CORE_ADDR
adjust_breakpoint_address (CORE_ADDR bpaddr
,
102 static void describe_other_breakpoints (CORE_ADDR
, asection
*);
104 static void breakpoints_info (char *, int);
106 static void breakpoint_1 (int, int);
108 static bpstat
bpstat_alloc (struct breakpoint
*, bpstat
);
110 static int breakpoint_cond_eval (void *);
112 static void cleanup_executing_breakpoints (void *);
114 static void commands_command (char *, int);
116 static void condition_command (char *, int);
118 static int get_number_trailer (char **, int);
120 static int do_captured_parse_breakpoint (struct ui_out
*, void *);
122 void set_breakpoint_count (int);
131 static int remove_breakpoint (struct bp_location
*, insertion_state_t
);
133 static enum print_stop_action
print_it_typical (bpstat
);
135 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
139 enum exception_event_kind kind
;
142 args_for_catchpoint_enable
;
144 static int watchpoint_check (void *);
146 static int cover_target_enable_exception_callback (void *);
148 static void maintenance_info_breakpoints (char *, int);
150 static void create_longjmp_breakpoint (char *);
152 static void create_overlay_event_breakpoint (char *);
154 static int hw_breakpoint_used_count (void);
156 static int hw_watchpoint_used_count (enum bptype
, int *);
158 static void hbreak_command (char *, int);
160 static void thbreak_command (char *, int);
162 static void watch_command_1 (char *, int, int);
164 static void rwatch_command (char *, int);
166 static void awatch_command (char *, int);
168 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
170 static void solib_load_unload_1 (char *hookname
,
173 char *cond_string
, enum bptype bp_kind
);
175 static void create_fork_vfork_event_catchpoint (int tempflag
,
177 enum bptype bp_kind
);
179 static void stop_command (char *arg
, int from_tty
);
181 static void stopin_command (char *arg
, int from_tty
);
183 static void stopat_command (char *arg
, int from_tty
);
185 static char *ep_find_event_name_end (char *arg
);
187 static char *ep_parse_optional_if_clause (char **arg
);
189 static char *ep_parse_optional_filename (char **arg
);
191 static void create_exception_catchpoint (int tempflag
, char *cond_string
,
192 enum exception_event_kind ex_event
,
193 struct symtab_and_line
*sal
);
195 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
196 char *arg
, int tempflag
, int from_tty
);
198 static void tcatch_command (char *arg
, int from_tty
);
200 static void ep_skip_leading_whitespace (char **s
);
202 /* Prototypes for exported functions. */
204 /* If FALSE, gdb will not use hardware support for watchpoints, even
205 if such is available. */
206 static int can_use_hw_watchpoints
;
208 /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints.
209 If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints
210 for unrecognized breakpoint locations.
211 If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */
212 static enum auto_boolean pending_break_support
;
214 void _initialize_breakpoint (void);
216 extern int addressprint
; /* Print machine addresses? */
218 /* Are we executing breakpoint commands? */
219 static int executing_breakpoint_commands
;
221 /* Are overlay event breakpoints enabled? */
222 static int overlay_events_enabled
;
224 /* Walk the following statement or block through all breakpoints.
225 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
228 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
230 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
231 for (B = breakpoint_chain; \
232 B ? (TMP=B->next, 1): 0; \
235 /* Similar iterators for the low-level breakpoints. */
237 #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->next)
239 #define ALL_BP_LOCATIONS_SAFE(B,TMP) \
240 for (B = bp_location_chain; \
241 B ? (TMP=B->next, 1): 0; \
244 /* True if breakpoint hit counts should be displayed in breakpoint info. */
246 int show_breakpoint_hit_counts
= 1;
248 /* Chains of all breakpoints defined. */
250 struct breakpoint
*breakpoint_chain
;
252 struct bp_location
*bp_location_chain
;
254 /* Number of last breakpoint made. */
256 int breakpoint_count
;
258 /* Pointer to current exception event record */
259 static struct exception_event_record
*current_exception_event
;
261 /* Indicator of whether exception catchpoints should be nuked between
262 runs of a program. */
263 int deprecated_exception_catchpoints_are_fragile
= 0;
265 /* Indicator of when exception catchpoints set-up should be
266 reinitialized -- e.g. when program is re-run. */
267 int deprecated_exception_support_initialized
= 0;
269 /* This function returns a pointer to the string representation of the
270 pathname of the dynamically-linked library that has just been
273 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
274 or undefined results are guaranteed.
276 This string's contents are only valid immediately after the
277 inferior has stopped in the dynamic linker hook, and becomes
278 invalid as soon as the inferior is continued. Clients should make
279 a copy of this string if they wish to continue the inferior and
280 then access the string. */
282 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
283 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
286 /* This function returns a pointer to the string representation of the
287 pathname of the dynamically-linked library that has just been
290 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
291 TRUE, or undefined results are guaranteed.
293 This string's contents are only valid immediately after the
294 inferior has stopped in the dynamic linker hook, and becomes
295 invalid as soon as the inferior is continued. Clients should make
296 a copy of this string if they wish to continue the inferior and
297 then access the string. */
299 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
300 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
303 /* This function is called by the "catch load" command. It allows the
304 debugger to be notified by the dynamic linker when a specified
305 library file (or any library file, if filename is NULL) is loaded. */
307 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
308 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
309 error ("catch of library loads not yet implemented on this platform")
312 /* This function is called by the "catch unload" command. It allows
313 the debugger to be notified by the dynamic linker when a specified
314 library file (or any library file, if filename is NULL) is
317 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
318 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \
319 error ("catch of library unloads not yet implemented on this platform")
322 /* Return whether a breakpoint is an active enabled breakpoint. */
324 breakpoint_enabled (struct breakpoint
*b
)
326 return (b
->enable_state
== bp_enabled
&& !b
->pending
);
329 /* Set breakpoint count to NUM. */
332 set_breakpoint_count (int num
)
334 breakpoint_count
= num
;
335 set_internalvar (lookup_internalvar ("bpnum"),
336 value_from_longest (builtin_type_int
, (LONGEST
) num
));
339 /* Used in run_command to zero the hit count when a new run starts. */
342 clear_breakpoint_hit_counts (void)
344 struct breakpoint
*b
;
350 /* Default address, symtab and line to put a breakpoint at
351 for "break" command with no arg.
352 if default_breakpoint_valid is zero, the other three are
353 not valid, and "break" with no arg is an error.
355 This set by print_stack_frame, which calls set_default_breakpoint. */
357 int default_breakpoint_valid
;
358 CORE_ADDR default_breakpoint_address
;
359 struct symtab
*default_breakpoint_symtab
;
360 int default_breakpoint_line
;
362 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
363 Advance *PP after the string and any trailing whitespace.
365 Currently the string can either be a number or "$" followed by the name
366 of a convenience variable. Making it an expression wouldn't work well
367 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
369 TRAILER is a character which can be found after the number; most
370 commonly this is `-'. If you don't want a trailer, use \0. */
372 get_number_trailer (char **pp
, int trailer
)
374 int retval
= 0; /* default */
378 /* Empty line means refer to the last breakpoint. */
379 return breakpoint_count
;
382 /* Make a copy of the name, so we can null-terminate it
383 to pass to lookup_internalvar(). */
388 while (isalnum (*p
) || *p
== '_')
390 varname
= (char *) alloca (p
- start
+ 1);
391 strncpy (varname
, start
, p
- start
);
392 varname
[p
- start
] = '\0';
393 val
= value_of_internalvar (lookup_internalvar (varname
));
394 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_INT
)
395 retval
= (int) value_as_long (val
);
398 printf_filtered ("Convenience variable must have integer value.\n");
406 while (*p
>= '0' && *p
<= '9')
409 /* There is no number here. (e.g. "cond a == b"). */
411 /* Skip non-numeric token */
412 while (*p
&& !isspace((int) *p
))
414 /* Return zero, which caller must interpret as error. */
420 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
422 /* Trailing junk: return 0 and let caller print error msg. */
423 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
434 /* Like get_number_trailer, but don't allow a trailer. */
436 get_number (char **pp
)
438 return get_number_trailer (pp
, '\0');
441 /* Parse a number or a range.
442 * A number will be of the form handled by get_number.
443 * A range will be of the form <number1> - <number2>, and
444 * will represent all the integers between number1 and number2,
447 * While processing a range, this fuction is called iteratively;
448 * At each call it will return the next value in the range.
450 * At the beginning of parsing a range, the char pointer PP will
451 * be advanced past <number1> and left pointing at the '-' token.
452 * Subsequent calls will not advance the pointer until the range
453 * is completed. The call that completes the range will advance
454 * pointer PP past <number2>.
458 get_number_or_range (char **pp
)
460 static int last_retval
, end_value
;
461 static char *end_ptr
;
462 static int in_range
= 0;
466 /* Default case: pp is pointing either to a solo number,
467 or to the first number of a range. */
468 last_retval
= get_number_trailer (pp
, '-');
473 /* This is the start of a range (<number1> - <number2>).
474 Skip the '-', parse and remember the second number,
475 and also remember the end of the final token. */
479 while (isspace ((int) *end_ptr
))
480 end_ptr
++; /* skip white space */
481 end_value
= get_number (temp
);
482 if (end_value
< last_retval
)
484 error ("inverted range");
486 else if (end_value
== last_retval
)
488 /* degenerate range (number1 == number2). Advance the
489 token pointer so that the range will be treated as a
498 error ("negative value");
501 /* pp points to the '-' that betokens a range. All
502 number-parsing has already been done. Return the next
503 integer value (one greater than the saved previous value).
504 Do not advance the token pointer 'pp' until the end of range
507 if (++last_retval
== end_value
)
509 /* End of range reached; advance token pointer. */
519 /* condition N EXP -- set break condition of breakpoint N to EXP. */
522 condition_command (char *arg
, int from_tty
)
524 struct breakpoint
*b
;
529 error_no_arg ("breakpoint number");
532 bnum
= get_number (&p
);
534 error ("Bad breakpoint argument: '%s'", arg
);
537 if (b
->number
== bnum
)
544 if (b
->cond_string
!= NULL
)
545 xfree (b
->cond_string
);
550 b
->cond_string
= NULL
;
552 printf_filtered ("Breakpoint %d now unconditional.\n", bnum
);
557 /* I don't know if it matters whether this is the string the user
558 typed in or the decompiled expression. */
559 b
->cond_string
= savestring (arg
, strlen (arg
));
562 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->loc
->address
), 0);
564 error ("Junk at end of expression");
567 breakpoints_changed ();
568 breakpoint_modify_event (b
->number
);
572 error ("No breakpoint number %d.", bnum
);
576 commands_command (char *arg
, int from_tty
)
578 struct breakpoint
*b
;
581 struct command_line
*l
;
583 /* If we allowed this, we would have problems with when to
584 free the storage, if we change the commands currently
587 if (executing_breakpoint_commands
)
588 error ("Can't use the \"commands\" command among a breakpoint's commands.");
591 bnum
= get_number (&p
);
594 error ("Unexpected extra arguments following breakpoint number.");
597 if (b
->number
== bnum
)
599 char *tmpbuf
= xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
601 struct cleanup
*cleanups
= make_cleanup (xfree
, tmpbuf
);
602 l
= read_command_lines (tmpbuf
, from_tty
);
603 do_cleanups (cleanups
);
604 free_command_lines (&b
->commands
);
606 breakpoints_changed ();
607 breakpoint_modify_event (b
->number
);
610 error ("No breakpoint number %d.", bnum
);
613 /* Like target_read_memory() but if breakpoints are inserted, return
614 the shadow contents instead of the breakpoints themselves.
616 Read "memory data" from whatever target or inferior we have.
617 Returns zero if successful, errno value if not. EIO is used
618 for address out of bounds. If breakpoints are inserted, returns
619 shadow contents, not the breakpoints themselves. From breakpoint.c. */
622 deprecated_read_memory_nobpt (CORE_ADDR memaddr
, char *myaddr
, unsigned len
)
625 struct bp_location
*b
;
626 CORE_ADDR bp_addr
= 0;
629 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
630 /* No breakpoints on this machine. */
631 return target_read_memory (memaddr
, myaddr
, len
);
635 if (b
->owner
->type
== bp_none
)
636 warning ("reading through apparently deleted breakpoint #%d?",
639 if (b
->loc_type
!= bp_loc_software_breakpoint
)
643 /* Addresses and length of the part of the breakpoint that
645 /* XXXX The m68k, sh and h8300 have different local and remote
646 breakpoint values. BREAKPOINT_FROM_PC still manages to
647 correctly determine the breakpoints memory address and size
648 for these targets. */
649 bp_addr
= b
->address
;
651 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
656 if (bp_addr
+ bp_size
<= memaddr
)
657 /* The breakpoint is entirely before the chunk of memory we
660 if (bp_addr
>= memaddr
+ len
)
661 /* The breakpoint is entirely after the chunk of memory we are
664 /* Copy the breakpoint from the shadow contents, and recurse for
665 the things before and after. */
667 /* Offset within shadow_contents. */
670 if (bp_addr
< memaddr
)
672 /* Only copy the second part of the breakpoint. */
673 bp_size
-= memaddr
- bp_addr
;
674 bptoffset
= memaddr
- bp_addr
;
678 if (bp_addr
+ bp_size
> memaddr
+ len
)
680 /* Only copy the first part of the breakpoint. */
681 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
684 memcpy (myaddr
+ bp_addr
- memaddr
,
685 b
->shadow_contents
+ bptoffset
, bp_size
);
687 if (bp_addr
> memaddr
)
689 /* Copy the section of memory before the breakpoint. */
690 status
= deprecated_read_memory_nobpt (memaddr
, myaddr
, bp_addr
- memaddr
);
695 if (bp_addr
+ bp_size
< memaddr
+ len
)
697 /* Copy the section of memory after the breakpoint. */
698 status
= deprecated_read_memory_nobpt (bp_addr
+ bp_size
,
699 myaddr
+ bp_addr
+ bp_size
- memaddr
,
700 memaddr
+ len
- (bp_addr
+ bp_size
));
707 /* Nothing overlaps. Just call read_memory_noerr. */
708 return target_read_memory (memaddr
, myaddr
, len
);
712 /* A wrapper function for inserting catchpoints. */
714 insert_catchpoint (struct ui_out
*uo
, void *args
)
716 struct breakpoint
*b
= (struct breakpoint
*) args
;
722 val
= target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
725 val
= target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
728 val
= target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
731 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
736 throw_exception (RETURN_ERROR
);
741 /* Helper routine: free the value chain for a breakpoint (watchpoint). */
743 static void free_valchain (struct bp_location
*b
)
748 /* Free the saved value chain. We will construct a new one
749 the next time the watchpoint is inserted. */
750 for (v
= b
->owner
->val_chain
; v
; v
= n
)
755 b
->owner
->val_chain
= NULL
;
758 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
759 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
760 PROCESS_WARNING, and HW_BREAKPOINT_ERROR are used to report problems.
762 NOTE drow/2003-09-09: This routine could be broken down to an object-style
763 method for each breakpoint or catchpoint type. */
765 insert_bp_location (struct bp_location
*bpt
,
766 struct ui_file
*tmp_error_stream
,
767 int *disabled_breaks
, int *process_warning
,
768 int *hw_breakpoint_error
)
772 /* Permanent breakpoints cannot be inserted or removed. Disabled
773 breakpoints should not be inserted. */
774 if (!breakpoint_enabled (bpt
->owner
))
777 if (bpt
->inserted
|| bpt
->duplicate
)
780 if (bpt
->loc_type
== bp_loc_software_breakpoint
781 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
783 /* First check to see if we have to handle an overlay. */
784 if (overlay_debugging
== ovly_off
785 || bpt
->section
== NULL
786 || !(section_is_overlay (bpt
->section
)))
788 /* No overlay handling: just set the breakpoint. */
790 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
791 val
= target_insert_hw_breakpoint (bpt
->address
,
792 bpt
->shadow_contents
);
794 val
= target_insert_breakpoint (bpt
->address
,
795 bpt
->shadow_contents
);
799 /* This breakpoint is in an overlay section.
800 Shall we set a breakpoint at the LMA? */
801 if (!overlay_events_enabled
)
803 /* Yes -- overlay event support is not active,
804 so we must try to set a breakpoint at the LMA.
805 This will not work for a hardware breakpoint. */
806 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
807 warning ("hardware breakpoint %d not supported in overlay!\n",
811 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
813 /* Set a software (trap) breakpoint at the LMA. */
814 val
= target_insert_breakpoint (addr
, bpt
->shadow_contents
);
816 fprintf_unfiltered (tmp_error_stream
,
817 "Overlay breakpoint %d failed: in ROM?",
821 /* Shall we set a breakpoint at the VMA? */
822 if (section_is_mapped (bpt
->section
))
824 /* Yes. This overlay section is mapped into memory. */
825 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
826 val
= target_insert_hw_breakpoint (bpt
->address
,
827 bpt
->shadow_contents
);
829 val
= target_insert_breakpoint (bpt
->address
,
830 bpt
->shadow_contents
);
834 /* No. This breakpoint will not be inserted.
835 No error, but do not mark the bp as 'inserted'. */
842 /* Can't set the breakpoint. */
843 #if defined (DISABLE_UNSETTABLE_BREAK)
844 if (DISABLE_UNSETTABLE_BREAK (bpt
->address
))
846 /* See also: disable_breakpoints_in_shlibs. */
848 bpt
->owner
->enable_state
= bp_shlib_disabled
;
849 if (!*disabled_breaks
)
851 fprintf_unfiltered (tmp_error_stream
,
852 "Cannot insert breakpoint %d.\n",
854 fprintf_unfiltered (tmp_error_stream
,
855 "Temporarily disabling shared library breakpoints:\n");
857 *disabled_breaks
= 1;
858 fprintf_unfiltered (tmp_error_stream
,
859 "breakpoint #%d\n", bpt
->owner
->number
);
864 #ifdef ONE_PROCESS_WRITETEXT
865 *process_warning
= 1;
867 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
869 *hw_breakpoint_error
= 1;
870 fprintf_unfiltered (tmp_error_stream
,
871 "Cannot insert hardware breakpoint %d.\n",
876 fprintf_unfiltered (tmp_error_stream
,
877 "Cannot insert breakpoint %d.\n",
879 fprintf_filtered (tmp_error_stream
,
880 "Error accessing memory address ");
881 print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
882 fprintf_filtered (tmp_error_stream
, ": %s.\n",
883 safe_strerror (val
));
894 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
895 /* NOTE drow/2003-09-08: This state only exists for removing
896 watchpoints. It's not clear that it's necessary... */
897 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
899 /* FIXME drow/2003-09-08: This code sets multiple hardware watchpoints
900 based on the expression. Ideally this should happen at a higher level,
901 and there should be one bp_location for each computed address we
902 must watch. As soon as a many-to-one mapping is available I'll
905 int within_current_scope
;
906 struct value
*mark
= value_mark ();
908 struct frame_id saved_frame_id
;
910 /* Save the current frame's ID so we can restore it after
911 evaluating the watchpoint expression on its own frame. */
912 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
913 took a frame parameter, so that we didn't have to change the
915 saved_frame_id
= get_frame_id (deprecated_selected_frame
);
917 /* Determine if the watchpoint is within scope. */
918 if (bpt
->owner
->exp_valid_block
== NULL
)
919 within_current_scope
= 1;
922 struct frame_info
*fi
;
923 fi
= frame_find_by_id (bpt
->owner
->watchpoint_frame
);
924 within_current_scope
= (fi
!= NULL
);
925 if (within_current_scope
)
929 if (within_current_scope
)
933 /* Evaluate the expression and cut the chain of values
934 produced off from the value chain.
936 Make sure the value returned isn't lazy; we use
937 laziness to determine what memory GDB actually needed
938 in order to compute the value of the expression. */
939 v
= evaluate_expression (bpt
->owner
->exp
);
941 value_release_to_mark (mark
);
943 bpt
->owner
->val_chain
= v
;
946 /* Look at each value on the value chain. */
947 for (; v
; v
= v
->next
)
949 /* If it's a memory location, and GDB actually needed
950 its contents to evaluate the expression, then we
952 if (VALUE_LVAL (v
) == lval_memory
955 struct type
*vtype
= check_typedef (value_type (v
));
957 /* We only watch structs and arrays if user asked
958 for it explicitly, never if they just happen to
959 appear in the middle of some value chain. */
960 if (v
== bpt
->owner
->val_chain
961 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
962 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
967 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
968 len
= TYPE_LENGTH (value_type (v
));
970 if (bpt
->owner
->type
== bp_read_watchpoint
)
972 else if (bpt
->owner
->type
== bp_access_watchpoint
)
975 val
= target_insert_watchpoint (addr
, len
, type
);
978 /* Don't exit the loop, try to insert
979 every value on the value chain. That's
980 because we will be removing all the
981 watches below, and removing a
982 watchpoint we didn't insert could have
990 /* Failure to insert a watchpoint on any memory value in the
991 value chain brings us here. */
994 remove_breakpoint (bpt
, mark_uninserted
);
995 *hw_breakpoint_error
= 1;
996 fprintf_unfiltered (tmp_error_stream
,
997 "Could not insert hardware watchpoint %d.\n",
1004 printf_filtered ("Hardware watchpoint %d deleted ", bpt
->owner
->number
);
1005 printf_filtered ("because the program has left the block \n");
1006 printf_filtered ("in which its expression is valid.\n");
1007 if (bpt
->owner
->related_breakpoint
)
1008 bpt
->owner
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1009 bpt
->owner
->disposition
= disp_del_at_next_stop
;
1012 /* Restore the selected frame. */
1013 select_frame (frame_find_by_id (saved_frame_id
));
1018 else if (ep_is_exception_catchpoint (bpt
->owner
))
1020 /* FIXME drow/2003-09-09: This code sets both a catchpoint and a
1021 breakpoint. Once again, it would be better if this was represented
1022 as two bp_locations. */
1024 /* If we get here, we must have a callback mechanism for exception
1025 events -- with g++ style embedded label support, we insert
1026 ordinary breakpoints and not catchpoints. */
1027 val
= target_insert_breakpoint (bpt
->address
, bpt
->shadow_contents
);
1030 /* Couldn't set breakpoint for some reason */
1031 fprintf_unfiltered (tmp_error_stream
,
1032 "Cannot insert catchpoint %d; disabling it.\n",
1033 bpt
->owner
->number
);
1034 fprintf_filtered (tmp_error_stream
,
1035 "Error accessing memory address ");
1036 print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
1037 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1038 safe_strerror (val
));
1039 bpt
->owner
->enable_state
= bp_disabled
;
1043 /* Bp set, now make sure callbacks are enabled */
1044 /* Format possible error msg */
1045 char *message
= xstrprintf ("Error inserting catchpoint %d:\n",
1046 bpt
->owner
->number
);
1047 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
1049 args_for_catchpoint_enable args
;
1050 args
.kind
= bpt
->owner
->type
== bp_catch_catch
?
1051 EX_EVENT_CATCH
: EX_EVENT_THROW
;
1053 val
= catch_errors (cover_target_enable_exception_callback
,
1054 &args
, message
, RETURN_MASK_ALL
);
1055 do_cleanups (cleanups
);
1056 if (val
!= 0 && val
!= -1)
1059 /* Check if something went wrong; val == 0 can be ignored */
1062 /* something went wrong */
1063 fprintf_unfiltered (tmp_error_stream
,
1064 "Cannot insert catchpoint %d; disabling it.\n",
1065 bpt
->owner
->number
);
1066 bpt
->owner
->enable_state
= bp_disabled
;
1073 else if (bpt
->owner
->type
== bp_catch_fork
1074 || bpt
->owner
->type
== bp_catch_vfork
1075 || bpt
->owner
->type
== bp_catch_exec
)
1077 char *prefix
= xstrprintf ("warning: inserting catchpoint %d: ",
1078 bpt
->owner
->number
);
1079 struct cleanup
*cleanups
= make_cleanup (xfree
, prefix
);
1080 val
= catch_exceptions (uiout
, insert_catchpoint
, bpt
->owner
, prefix
,
1082 do_cleanups (cleanups
);
1084 bpt
->owner
->enable_state
= bp_disabled
;
1088 /* We've already printed an error message if there was a problem
1089 inserting this catchpoint, and we've disabled the catchpoint,
1090 so just return success. */
1097 /* insert_breakpoints is used when starting or continuing the program.
1098 remove_breakpoints is used when the program stops.
1099 Both return zero if successful,
1100 or an `errno' value if could not write the inferior. */
1103 insert_breakpoints (void)
1105 struct bp_location
*b
, *temp
;
1106 int return_val
= 0; /* return success code. */
1108 int disabled_breaks
= 0;
1109 int hw_breakpoint_error
= 0;
1110 int process_warning
= 0;
1112 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1113 make_cleanup_ui_file_delete (tmp_error_stream
);
1115 /* Explicitly mark the warning -- this will only be printed if
1116 there was an error. */
1117 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1119 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1121 /* Permanent breakpoints cannot be inserted or removed. Disabled
1122 breakpoints should not be inserted. */
1123 if (!breakpoint_enabled (b
->owner
))
1126 /* FIXME drow/2003-10-07: This code should be pushed elsewhere when
1127 hardware watchpoints are split into multiple loc breakpoints. */
1128 if ((b
->loc_type
== bp_loc_hardware_watchpoint
1129 || b
->owner
->type
== bp_watchpoint
) && !b
->owner
->val
)
1132 val
= evaluate_expression (b
->owner
->exp
);
1133 release_value (val
);
1134 if (VALUE_LAZY (val
))
1135 value_fetch_lazy (val
);
1136 b
->owner
->val
= val
;
1139 val
= insert_bp_location (b
, tmp_error_stream
,
1140 &disabled_breaks
, &process_warning
,
1141 &hw_breakpoint_error
);
1148 /* If a hardware breakpoint or watchpoint was inserted, add a
1149 message about possibly exhausted resources. */
1150 if (hw_breakpoint_error
)
1152 fprintf_unfiltered (tmp_error_stream
,
1153 "Could not insert hardware breakpoints:\n\
1154 You may have requested too many hardware breakpoints/watchpoints.\n");
1156 #ifdef ONE_PROCESS_WRITETEXT
1157 if (process_warning
)
1158 fprintf_unfiltered (tmp_error_stream
,
1159 "The same program may be running in another process.");
1161 target_terminal_ours_for_output ();
1162 error_stream (tmp_error_stream
);
1168 remove_breakpoints (void)
1170 struct bp_location
*b
;
1173 ALL_BP_LOCATIONS (b
)
1177 val
= remove_breakpoint (b
, mark_uninserted
);
1186 remove_hw_watchpoints (void)
1188 struct bp_location
*b
;
1191 ALL_BP_LOCATIONS (b
)
1193 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1195 val
= remove_breakpoint (b
, mark_uninserted
);
1204 reattach_breakpoints (int pid
)
1206 struct bp_location
*b
;
1208 struct cleanup
*old_chain
= save_inferior_ptid ();
1210 /* Set inferior_ptid; remove_breakpoint uses this global. */
1211 inferior_ptid
= pid_to_ptid (pid
);
1212 ALL_BP_LOCATIONS (b
)
1216 remove_breakpoint (b
, mark_inserted
);
1217 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1218 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
1220 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
1221 /* FIXME drow/2003-10-07: This doesn't handle any other kinds of
1222 breakpoints. It's wrong for watchpoints, for example. */
1225 do_cleanups (old_chain
);
1230 do_cleanups (old_chain
);
1235 update_breakpoints_after_exec (void)
1237 struct breakpoint
*b
;
1238 struct breakpoint
*temp
;
1240 /* Doing this first prevents the badness of having delete_breakpoint()
1241 write a breakpoint's current "shadow contents" to lift the bp. That
1242 shadow is NOT valid after an exec()! */
1243 mark_breakpoints_out ();
1245 ALL_BREAKPOINTS_SAFE (b
, temp
)
1247 /* Solib breakpoints must be explicitly reset after an exec(). */
1248 if (b
->type
== bp_shlib_event
)
1250 delete_breakpoint (b
);
1254 /* Thread event breakpoints must be set anew after an exec(),
1255 as must overlay event breakpoints. */
1256 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1258 delete_breakpoint (b
);
1262 /* Step-resume breakpoints are meaningless after an exec(). */
1263 if (b
->type
== bp_step_resume
)
1265 delete_breakpoint (b
);
1269 /* Ditto the sigtramp handler breakpoints. */
1270 if (b
->type
== bp_through_sigtramp
)
1272 delete_breakpoint (b
);
1276 /* Ditto the exception-handling catchpoints. */
1277 if ((b
->type
== bp_catch_catch
) || (b
->type
== bp_catch_throw
))
1279 delete_breakpoint (b
);
1283 /* Don't delete an exec catchpoint, because else the inferior
1284 won't stop when it ought!
1286 Similarly, we probably ought to keep vfork catchpoints, 'cause
1287 on this target, we may not be able to stop when the vfork is
1288 seen, but only when the subsequent exec is seen. (And because
1289 deleting fork catchpoints here but not vfork catchpoints will
1290 seem mysterious to users, keep those too.)
1292 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1293 target address field, if any, is sufficient to have it be reset
1294 automagically. Certainly on HP-UX that's true.
1296 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1297 valid code address on some platforms (like the mn10300
1298 simulators). We shouldn't assign any special interpretation to
1299 a breakpoint with a zero address. And in fact, GDB doesn't ---
1300 I can't see what that comment above is talking about. As far
1301 as I can tell, setting the address of a
1302 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1303 is meaningless, since those are implemented with HP-UX kernel
1304 hackery, not by storing breakpoint instructions somewhere. */
1305 if ((b
->type
== bp_catch_exec
) ||
1306 (b
->type
== bp_catch_vfork
) ||
1307 (b
->type
== bp_catch_fork
))
1309 b
->loc
->address
= (CORE_ADDR
) NULL
;
1313 /* bp_finish is a special case. The only way we ought to be able
1314 to see one of these when an exec() has happened, is if the user
1315 caught a vfork, and then said "finish". Ordinarily a finish just
1316 carries them to the call-site of the current callee, by setting
1317 a temporary bp there and resuming. But in this case, the finish
1318 will carry them entirely through the vfork & exec.
1320 We don't want to allow a bp_finish to remain inserted now. But
1321 we can't safely delete it, 'cause finish_command has a handle to
1322 the bp on a bpstat, and will later want to delete it. There's a
1323 chance (and I've seen it happen) that if we delete the bp_finish
1324 here, that its storage will get reused by the time finish_command
1325 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1326 We really must allow finish_command to delete a bp_finish.
1328 In the absense of a general solution for the "how do we know
1329 it's safe to delete something others may have handles to?"
1330 problem, what we'll do here is just uninsert the bp_finish, and
1331 let finish_command delete it.
1333 (We know the bp_finish is "doomed" in the sense that it's
1334 momentary, and will be deleted as soon as finish_command sees
1335 the inferior stopped. So it doesn't matter that the bp's
1336 address is probably bogus in the new a.out, unlike e.g., the
1337 solib breakpoints.) */
1339 if (b
->type
== bp_finish
)
1344 /* Without a symbolic address, we have little hope of the
1345 pre-exec() address meaning the same thing in the post-exec()
1347 if (b
->addr_string
== NULL
)
1349 delete_breakpoint (b
);
1353 /* If this breakpoint has survived the above battery of checks, then
1354 it must have a symbolic address. Be sure that it gets reevaluated
1355 to a target address, rather than reusing the old evaluation.
1357 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1358 for bp_catch_exec and friends, I'm pretty sure this is entirely
1359 unnecessary. A call to breakpoint_re_set_one always recomputes
1360 the breakpoint's address from scratch, or deletes it if it can't.
1361 So I think this assignment could be deleted without effect. */
1362 b
->loc
->address
= (CORE_ADDR
) NULL
;
1364 /* FIXME what about longjmp breakpoints? Re-create them here? */
1365 create_overlay_event_breakpoint ("_ovly_debug_event");
1369 detach_breakpoints (int pid
)
1371 struct bp_location
*b
;
1373 struct cleanup
*old_chain
= save_inferior_ptid ();
1375 if (pid
== PIDGET (inferior_ptid
))
1376 error ("Cannot detach breakpoints of inferior_ptid");
1378 /* Set inferior_ptid; remove_breakpoint uses this global. */
1379 inferior_ptid
= pid_to_ptid (pid
);
1380 ALL_BP_LOCATIONS (b
)
1384 val
= remove_breakpoint (b
, mark_inserted
);
1387 do_cleanups (old_chain
);
1392 do_cleanups (old_chain
);
1397 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1401 if (b
->owner
->enable_state
== bp_permanent
)
1402 /* Permanent breakpoints cannot be inserted or removed. */
1405 if (b
->owner
->type
== bp_none
)
1406 warning ("attempted to remove apparently deleted breakpoint #%d?",
1409 if (b
->loc_type
== bp_loc_software_breakpoint
1410 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1412 /* "Normal" instruction breakpoint: either the standard
1413 trap-instruction bp (bp_breakpoint), or a
1414 bp_hardware_breakpoint. */
1416 /* First check to see if we have to handle an overlay. */
1417 if (overlay_debugging
== ovly_off
1418 || b
->section
== NULL
1419 || !(section_is_overlay (b
->section
)))
1421 /* No overlay handling: just remove the breakpoint. */
1423 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1424 val
= target_remove_hw_breakpoint (b
->address
,
1425 b
->shadow_contents
);
1427 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1431 /* This breakpoint is in an overlay section.
1432 Did we set a breakpoint at the LMA? */
1433 if (!overlay_events_enabled
)
1435 /* Yes -- overlay event support is not active, so we
1436 should have set a breakpoint at the LMA. Remove it.
1438 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
1440 /* Ignore any failures: if the LMA is in ROM, we will
1441 have already warned when we failed to insert it. */
1442 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1443 target_remove_hw_breakpoint (addr
, b
->shadow_contents
);
1445 target_remove_breakpoint (addr
, b
->shadow_contents
);
1447 /* Did we set a breakpoint at the VMA?
1448 If so, we will have marked the breakpoint 'inserted'. */
1451 /* Yes -- remove it. Previously we did not bother to
1452 remove the breakpoint if the section had been
1453 unmapped, but let's not rely on that being safe. We
1454 don't know what the overlay manager might do. */
1455 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1456 val
= target_remove_hw_breakpoint (b
->address
,
1457 b
->shadow_contents
);
1459 val
= target_remove_breakpoint (b
->address
,
1460 b
->shadow_contents
);
1464 /* No -- not inserted, so no need to remove. No error. */
1470 b
->inserted
= (is
== mark_inserted
);
1472 else if (b
->loc_type
== bp_loc_hardware_watchpoint
1473 && breakpoint_enabled (b
->owner
)
1479 b
->inserted
= (is
== mark_inserted
);
1480 /* Walk down the saved value chain. */
1481 for (v
= b
->owner
->val_chain
; v
; v
= v
->next
)
1483 /* For each memory reference remove the watchpoint
1485 if (VALUE_LVAL (v
) == lval_memory
1486 && ! VALUE_LAZY (v
))
1488 struct type
*vtype
= check_typedef (value_type (v
));
1490 if (v
== b
->owner
->val_chain
1491 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1492 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1497 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
1498 len
= TYPE_LENGTH (value_type (v
));
1500 if (b
->owner
->type
== bp_read_watchpoint
)
1502 else if (b
->owner
->type
== bp_access_watchpoint
)
1505 val
= target_remove_watchpoint (addr
, len
, type
);
1512 /* Failure to remove any of the hardware watchpoints comes here. */
1513 if ((is
== mark_uninserted
) && (b
->inserted
))
1514 warning ("Could not remove hardware watchpoint %d.",
1517 else if ((b
->owner
->type
== bp_catch_fork
||
1518 b
->owner
->type
== bp_catch_vfork
||
1519 b
->owner
->type
== bp_catch_exec
)
1520 && breakpoint_enabled (b
->owner
)
1524 switch (b
->owner
->type
)
1527 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1529 case bp_catch_vfork
:
1530 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1533 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1536 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1541 b
->inserted
= (is
== mark_inserted
);
1543 else if ((b
->owner
->type
== bp_catch_catch
||
1544 b
->owner
->type
== bp_catch_throw
)
1545 && breakpoint_enabled (b
->owner
)
1549 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1552 b
->inserted
= (is
== mark_inserted
);
1554 else if (ep_is_exception_catchpoint (b
->owner
)
1555 && b
->inserted
/* sometimes previous insert doesn't happen */
1556 && breakpoint_enabled (b
->owner
)
1560 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1564 b
->inserted
= (is
== mark_inserted
);
1570 /* Clear the "inserted" flag in all breakpoints. */
1573 mark_breakpoints_out (void)
1575 struct bp_location
*bpt
;
1577 ALL_BP_LOCATIONS (bpt
)
1581 /* Clear the "inserted" flag in all breakpoints and delete any
1582 breakpoints which should go away between runs of the program.
1584 Plus other such housekeeping that has to be done for breakpoints
1587 Note: this function gets called at the end of a run (by
1588 generic_mourn_inferior) and when a run begins (by
1589 init_wait_for_inferior). */
1594 breakpoint_init_inferior (enum inf_context context
)
1596 struct breakpoint
*b
, *temp
;
1597 struct bp_location
*bpt
;
1598 static int warning_needed
= 0;
1600 ALL_BP_LOCATIONS (bpt
)
1603 ALL_BREAKPOINTS_SAFE (b
, temp
)
1608 case bp_watchpoint_scope
:
1610 /* If the call dummy breakpoint is at the entry point it will
1611 cause problems when the inferior is rerun, so we better
1614 Also get rid of scope breakpoints. */
1615 delete_breakpoint (b
);
1619 case bp_hardware_watchpoint
:
1620 case bp_read_watchpoint
:
1621 case bp_access_watchpoint
:
1623 /* Likewise for watchpoints on local expressions. */
1624 if (b
->exp_valid_block
!= NULL
)
1625 delete_breakpoint (b
);
1626 if (context
== inf_starting
)
1628 /* Reset val field to force reread of starting value
1629 in insert_breakpoints. */
1631 value_free (b
->val
);
1636 /* Likewise for exception catchpoints in dynamic-linked
1637 executables where required */
1638 if (ep_is_exception_catchpoint (b
)
1639 && deprecated_exception_catchpoints_are_fragile
)
1642 delete_breakpoint (b
);
1648 if (deprecated_exception_catchpoints_are_fragile
)
1649 deprecated_exception_support_initialized
= 0;
1651 /* Don't issue the warning unless it's really needed... */
1652 if (warning_needed
&& (context
!= inf_exited
))
1654 warning ("Exception catchpoints from last run were deleted.");
1655 warning ("You must reinsert them explicitly.");
1660 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1661 exists at PC. It returns ordinary_breakpoint_here if it's an
1662 ordinary breakpoint, or permanent_breakpoint_here if it's a
1663 permanent breakpoint.
1664 - When continuing from a location with an ordinary breakpoint, we
1665 actually single step once before calling insert_breakpoints.
1666 - When continuing from a localion with a permanent breakpoint, we
1667 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1668 the target, to advance the PC past the breakpoint. */
1670 enum breakpoint_here
1671 breakpoint_here_p (CORE_ADDR pc
)
1673 struct bp_location
*bpt
;
1674 int any_breakpoint_here
= 0;
1676 ALL_BP_LOCATIONS (bpt
)
1678 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1679 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1682 if ((breakpoint_enabled (bpt
->owner
)
1683 || bpt
->owner
->enable_state
== bp_permanent
)
1684 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1686 if (overlay_debugging
1687 && section_is_overlay (bpt
->section
)
1688 && !section_is_mapped (bpt
->section
))
1689 continue; /* unmapped overlay -- can't be a match */
1690 else if (bpt
->owner
->enable_state
== bp_permanent
)
1691 return permanent_breakpoint_here
;
1693 any_breakpoint_here
= 1;
1697 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1701 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1702 but it only returns true if there is actually a breakpoint inserted
1706 breakpoint_inserted_here_p (CORE_ADDR pc
)
1708 struct bp_location
*bpt
;
1710 ALL_BP_LOCATIONS (bpt
)
1712 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1713 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1717 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1719 if (overlay_debugging
1720 && section_is_overlay (bpt
->section
)
1721 && !section_is_mapped (bpt
->section
))
1722 continue; /* unmapped overlay -- can't be a match */
1731 /* This function returns non-zero iff there is a software breakpoint
1735 software_breakpoint_inserted_here_p (CORE_ADDR pc
)
1737 struct bp_location
*bpt
;
1738 int any_breakpoint_here
= 0;
1740 ALL_BP_LOCATIONS (bpt
)
1742 if (bpt
->loc_type
!= bp_loc_software_breakpoint
)
1745 if ((breakpoint_enabled (bpt
->owner
)
1746 || bpt
->owner
->enable_state
== bp_permanent
)
1748 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1750 if (overlay_debugging
1751 && section_is_overlay (bpt
->section
)
1752 && !section_is_mapped (bpt
->section
))
1753 continue; /* unmapped overlay -- can't be a match */
1762 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1763 PC is valid for process/thread PTID. */
1766 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1768 struct bp_location
*bpt
;
1771 thread
= pid_to_thread_id (ptid
);
1773 ALL_BP_LOCATIONS (bpt
)
1775 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1776 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1779 if ((breakpoint_enabled (bpt
->owner
)
1780 || bpt
->owner
->enable_state
== bp_permanent
)
1781 && bpt
->address
== pc
1782 && (bpt
->owner
->thread
== -1 || bpt
->owner
->thread
== thread
))
1784 if (overlay_debugging
1785 && section_is_overlay (bpt
->section
)
1786 && !section_is_mapped (bpt
->section
))
1787 continue; /* unmapped overlay -- can't be a match */
1797 /* bpstat stuff. External routines' interfaces are documented
1801 ep_is_catchpoint (struct breakpoint
*ep
)
1804 (ep
->type
== bp_catch_load
)
1805 || (ep
->type
== bp_catch_unload
)
1806 || (ep
->type
== bp_catch_fork
)
1807 || (ep
->type
== bp_catch_vfork
)
1808 || (ep
->type
== bp_catch_exec
)
1809 || (ep
->type
== bp_catch_catch
)
1810 || (ep
->type
== bp_catch_throw
);
1812 /* ??rehrauer: Add more kinds here, as are implemented... */
1816 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1819 (ep
->type
== bp_catch_load
)
1820 || (ep
->type
== bp_catch_unload
);
1824 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1827 (ep
->type
== bp_catch_catch
)
1828 || (ep
->type
== bp_catch_throw
);
1831 /* Clear a bpstat so that it says we are not at any breakpoint.
1832 Also free any storage that is part of a bpstat. */
1835 bpstat_clear (bpstat
*bsp
)
1846 if (p
->old_val
!= NULL
)
1847 value_free (p
->old_val
);
1848 free_command_lines (&p
->commands
);
1855 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1856 is part of the bpstat is copied as well. */
1859 bpstat_copy (bpstat bs
)
1863 bpstat retval
= NULL
;
1868 for (; bs
!= NULL
; bs
= bs
->next
)
1870 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1871 memcpy (tmp
, bs
, sizeof (*tmp
));
1872 if (bs
->commands
!= NULL
)
1873 tmp
->commands
= copy_command_lines (bs
->commands
);
1874 if (bs
->old_val
!= NULL
)
1875 tmp
->old_val
= value_copy (bs
->old_val
);
1878 /* This is the first thing in the chain. */
1888 /* Find the bpstat associated with this breakpoint */
1891 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1896 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1898 if (bsp
->breakpoint_at
== breakpoint
)
1904 /* Find a step_resume breakpoint associated with this bpstat.
1905 (If there are multiple step_resume bp's on the list, this function
1906 will arbitrarily pick one.)
1908 It is an error to use this function if BPSTAT doesn't contain a
1909 step_resume breakpoint.
1911 See wait_for_inferior's use of this function. */
1913 bpstat_find_step_resume_breakpoint (bpstat bsp
)
1918 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1920 current_thread
= pid_to_thread_id (inferior_ptid
);
1922 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1924 if ((bsp
->breakpoint_at
!= NULL
) &&
1925 (bsp
->breakpoint_at
->type
== bp_step_resume
) &&
1926 (bsp
->breakpoint_at
->thread
== current_thread
||
1927 bsp
->breakpoint_at
->thread
== -1))
1928 return bsp
->breakpoint_at
;
1931 error ("Internal error (no step_resume breakpoint found)");
1935 /* Return the breakpoint number of the first breakpoint we are stopped
1936 at. *BSP upon return is a bpstat which points to the remaining
1937 breakpoints stopped at (but which is not guaranteed to be good for
1938 anything but further calls to bpstat_num).
1939 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1942 bpstat_num (bpstat
*bsp
)
1944 struct breakpoint
*b
;
1947 return 0; /* No more breakpoint values */
1950 b
= (*bsp
)->breakpoint_at
;
1951 *bsp
= (*bsp
)->next
;
1953 return -1; /* breakpoint that's been deleted since */
1955 return b
->number
; /* We have its number */
1959 /* Modify BS so that the actions will not be performed. */
1962 bpstat_clear_actions (bpstat bs
)
1964 for (; bs
!= NULL
; bs
= bs
->next
)
1966 free_command_lines (&bs
->commands
);
1967 if (bs
->old_val
!= NULL
)
1969 value_free (bs
->old_val
);
1975 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1977 cleanup_executing_breakpoints (void *ignore
)
1979 executing_breakpoint_commands
= 0;
1982 /* Execute all the commands associated with all the breakpoints at this
1983 location. Any of these commands could cause the process to proceed
1984 beyond this point, etc. We look out for such changes by checking
1985 the global "breakpoint_proceeded" after each command. */
1988 bpstat_do_actions (bpstat
*bsp
)
1991 struct cleanup
*old_chain
;
1993 /* Avoid endless recursion if a `source' command is contained
1995 if (executing_breakpoint_commands
)
1998 executing_breakpoint_commands
= 1;
1999 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
2002 /* Note that (as of this writing), our callers all appear to
2003 be passing us the address of global stop_bpstat. And, if
2004 our calls to execute_control_command cause the inferior to
2005 proceed, that global (and hence, *bsp) will change.
2007 We must be careful to not touch *bsp unless the inferior
2008 has not proceeded. */
2010 /* This pointer will iterate over the list of bpstat's. */
2013 breakpoint_proceeded
= 0;
2014 for (; bs
!= NULL
; bs
= bs
->next
)
2016 struct command_line
*cmd
;
2017 struct cleanup
*this_cmd_tree_chain
;
2019 /* Take ownership of the BSP's command tree, if it has one.
2021 The command tree could legitimately contain commands like
2022 'step' and 'next', which call clear_proceed_status, which
2023 frees stop_bpstat's command tree. To make sure this doesn't
2024 free the tree we're executing out from under us, we need to
2025 take ownership of the tree ourselves. Since a given bpstat's
2026 commands are only executed once, we don't need to copy it; we
2027 can clear the pointer in the bpstat, and make sure we free
2028 the tree when we're done. */
2031 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2035 execute_control_command (cmd
);
2037 if (breakpoint_proceeded
)
2043 /* We can free this command tree now. */
2044 do_cleanups (this_cmd_tree_chain
);
2046 if (breakpoint_proceeded
)
2047 /* The inferior is proceeded by the command; bomb out now.
2048 The bpstat chain has been blown away by wait_for_inferior.
2049 But since execution has stopped again, there is a new bpstat
2050 to look at, so start over. */
2053 do_cleanups (old_chain
);
2056 /* This is the normal print function for a bpstat. In the future,
2057 much of this logic could (should?) be moved to bpstat_stop_status,
2058 by having it set different print_it values.
2060 Current scheme: When we stop, bpstat_print() is called. It loops
2061 through the bpstat list of things causing this stop, calling the
2062 print_bp_stop_message function on each one. The behavior of the
2063 print_bp_stop_message function depends on the print_it field of
2064 bpstat. If such field so indicates, call this function here.
2066 Return values from this routine (ultimately used by bpstat_print()
2067 and normal_stop() to decide what to do):
2068 PRINT_NOTHING: Means we already printed all we needed to print,
2069 don't print anything else.
2070 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2071 that something to be followed by a location.
2072 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2073 that something to be followed by a location.
2074 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2077 static enum print_stop_action
2078 print_it_typical (bpstat bs
)
2080 struct cleanup
*old_chain
, *ui_out_chain
;
2081 struct ui_stream
*stb
;
2082 stb
= ui_out_stream_new (uiout
);
2083 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2084 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2085 which has since been deleted. */
2086 if (bs
->breakpoint_at
== NULL
)
2087 return PRINT_UNKNOWN
;
2089 switch (bs
->breakpoint_at
->type
)
2092 case bp_hardware_breakpoint
:
2093 if (bs
->breakpoint_at
->loc
->address
!= bs
->breakpoint_at
->loc
->requested_address
)
2094 breakpoint_adjustment_warning (bs
->breakpoint_at
->loc
->requested_address
,
2095 bs
->breakpoint_at
->loc
->address
,
2096 bs
->breakpoint_at
->number
, 1);
2097 annotate_breakpoint (bs
->breakpoint_at
->number
);
2098 ui_out_text (uiout
, "\nBreakpoint ");
2099 if (ui_out_is_mi_like_p (uiout
))
2100 ui_out_field_string (uiout
, "reason", "breakpoint-hit");
2101 ui_out_field_int (uiout
, "bkptno", bs
->breakpoint_at
->number
);
2102 ui_out_text (uiout
, ", ");
2103 return PRINT_SRC_AND_LOC
;
2106 case bp_shlib_event
:
2107 /* Did we stop because the user set the stop_on_solib_events
2108 variable? (If so, we report this as a generic, "Stopped due
2109 to shlib event" message.) */
2110 printf_filtered ("Stopped due to shared library event\n");
2111 return PRINT_NOTHING
;
2114 case bp_thread_event
:
2115 /* Not sure how we will get here.
2116 GDB should not stop for these breakpoints. */
2117 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
2118 return PRINT_NOTHING
;
2121 case bp_overlay_event
:
2122 /* By analogy with the thread event, GDB should not stop for these. */
2123 printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n");
2124 return PRINT_NOTHING
;
2128 annotate_catchpoint (bs
->breakpoint_at
->number
);
2129 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2130 printf_filtered ("loaded");
2131 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2132 return PRINT_SRC_AND_LOC
;
2135 case bp_catch_unload
:
2136 annotate_catchpoint (bs
->breakpoint_at
->number
);
2137 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2138 printf_filtered ("unloaded");
2139 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2140 return PRINT_SRC_AND_LOC
;
2144 annotate_catchpoint (bs
->breakpoint_at
->number
);
2145 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2146 printf_filtered ("forked");
2147 printf_filtered (" process %d), ",
2148 bs
->breakpoint_at
->forked_inferior_pid
);
2149 return PRINT_SRC_AND_LOC
;
2152 case bp_catch_vfork
:
2153 annotate_catchpoint (bs
->breakpoint_at
->number
);
2154 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2155 printf_filtered ("vforked");
2156 printf_filtered (" process %d), ",
2157 bs
->breakpoint_at
->forked_inferior_pid
);
2158 return PRINT_SRC_AND_LOC
;
2162 annotate_catchpoint (bs
->breakpoint_at
->number
);
2163 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
2164 bs
->breakpoint_at
->number
,
2165 bs
->breakpoint_at
->exec_pathname
);
2166 return PRINT_SRC_AND_LOC
;
2169 case bp_catch_catch
:
2170 if (current_exception_event
&&
2171 (CURRENT_EXCEPTION_KIND
== EX_EVENT_CATCH
))
2173 annotate_catchpoint (bs
->breakpoint_at
->number
);
2174 printf_filtered ("\nCatchpoint %d (exception caught), ",
2175 bs
->breakpoint_at
->number
);
2176 printf_filtered ("throw location ");
2177 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2178 printf_filtered ("%s:%d",
2179 CURRENT_EXCEPTION_THROW_FILE
,
2180 CURRENT_EXCEPTION_THROW_LINE
);
2182 printf_filtered ("unknown");
2184 printf_filtered (", catch location ");
2185 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2186 printf_filtered ("%s:%d",
2187 CURRENT_EXCEPTION_CATCH_FILE
,
2188 CURRENT_EXCEPTION_CATCH_LINE
);
2190 printf_filtered ("unknown");
2192 printf_filtered ("\n");
2193 /* don't bother to print location frame info */
2194 return PRINT_SRC_ONLY
;
2198 /* really throw, some other bpstat will handle it */
2199 return PRINT_UNKNOWN
;
2203 case bp_catch_throw
:
2204 if (current_exception_event
&&
2205 (CURRENT_EXCEPTION_KIND
== EX_EVENT_THROW
))
2207 annotate_catchpoint (bs
->breakpoint_at
->number
);
2208 printf_filtered ("\nCatchpoint %d (exception thrown), ",
2209 bs
->breakpoint_at
->number
);
2210 printf_filtered ("throw location ");
2211 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2212 printf_filtered ("%s:%d",
2213 CURRENT_EXCEPTION_THROW_FILE
,
2214 CURRENT_EXCEPTION_THROW_LINE
);
2216 printf_filtered ("unknown");
2218 printf_filtered (", catch location ");
2219 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2220 printf_filtered ("%s:%d",
2221 CURRENT_EXCEPTION_CATCH_FILE
,
2222 CURRENT_EXCEPTION_CATCH_LINE
);
2224 printf_filtered ("unknown");
2226 printf_filtered ("\n");
2227 /* don't bother to print location frame info */
2228 return PRINT_SRC_ONLY
;
2232 /* really catch, some other bpstat will handle it */
2233 return PRINT_UNKNOWN
;
2238 case bp_hardware_watchpoint
:
2239 if (bs
->old_val
!= NULL
)
2241 annotate_watchpoint (bs
->breakpoint_at
->number
);
2242 if (ui_out_is_mi_like_p (uiout
))
2243 ui_out_field_string (uiout
, "reason", "watchpoint-trigger");
2244 mention (bs
->breakpoint_at
);
2245 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2246 ui_out_text (uiout
, "\nOld value = ");
2247 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2248 ui_out_field_stream (uiout
, "old", stb
);
2249 ui_out_text (uiout
, "\nNew value = ");
2250 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2251 ui_out_field_stream (uiout
, "new", stb
);
2252 do_cleanups (ui_out_chain
);
2253 ui_out_text (uiout
, "\n");
2254 value_free (bs
->old_val
);
2257 /* More than one watchpoint may have been triggered. */
2258 return PRINT_UNKNOWN
;
2261 case bp_read_watchpoint
:
2262 if (ui_out_is_mi_like_p (uiout
))
2263 ui_out_field_string (uiout
, "reason", "read-watchpoint-trigger");
2264 mention (bs
->breakpoint_at
);
2265 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2266 ui_out_text (uiout
, "\nValue = ");
2267 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2268 ui_out_field_stream (uiout
, "value", stb
);
2269 do_cleanups (ui_out_chain
);
2270 ui_out_text (uiout
, "\n");
2271 return PRINT_UNKNOWN
;
2274 case bp_access_watchpoint
:
2275 if (bs
->old_val
!= NULL
)
2277 annotate_watchpoint (bs
->breakpoint_at
->number
);
2278 if (ui_out_is_mi_like_p (uiout
))
2279 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2280 mention (bs
->breakpoint_at
);
2281 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2282 ui_out_text (uiout
, "\nOld value = ");
2283 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2284 ui_out_field_stream (uiout
, "old", stb
);
2285 value_free (bs
->old_val
);
2287 ui_out_text (uiout
, "\nNew value = ");
2291 mention (bs
->breakpoint_at
);
2292 if (ui_out_is_mi_like_p (uiout
))
2293 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2294 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2295 ui_out_text (uiout
, "\nValue = ");
2297 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0,Val_pretty_default
);
2298 ui_out_field_stream (uiout
, "new", stb
);
2299 do_cleanups (ui_out_chain
);
2300 ui_out_text (uiout
, "\n");
2301 return PRINT_UNKNOWN
;
2304 /* Fall through, we don't deal with these types of breakpoints
2308 if (ui_out_is_mi_like_p (uiout
))
2309 ui_out_field_string (uiout
, "reason", "function-finished");
2310 return PRINT_UNKNOWN
;
2314 if (ui_out_is_mi_like_p (uiout
))
2315 ui_out_field_string (uiout
, "reason", "location-reached");
2316 return PRINT_UNKNOWN
;
2321 case bp_longjmp_resume
:
2322 case bp_step_resume
:
2323 case bp_through_sigtramp
:
2324 case bp_watchpoint_scope
:
2327 return PRINT_UNKNOWN
;
2331 /* Generic routine for printing messages indicating why we
2332 stopped. The behavior of this function depends on the value
2333 'print_it' in the bpstat structure. Under some circumstances we
2334 may decide not to print anything here and delegate the task to
2337 static enum print_stop_action
2338 print_bp_stop_message (bpstat bs
)
2340 switch (bs
->print_it
)
2343 /* Nothing should be printed for this bpstat entry. */
2344 return PRINT_UNKNOWN
;
2348 /* We still want to print the frame, but we already printed the
2349 relevant messages. */
2350 return PRINT_SRC_AND_LOC
;
2353 case print_it_normal
:
2354 /* Normal case. Call the breakpoint's print_it method, or
2355 print_it_typical. */
2356 if (bs
->breakpoint_at
!= NULL
&& bs
->breakpoint_at
->ops
!= NULL
2357 && bs
->breakpoint_at
->ops
->print_it
!= NULL
)
2358 return bs
->breakpoint_at
->ops
->print_it (bs
->breakpoint_at
);
2360 return print_it_typical (bs
);
2364 internal_error (__FILE__
, __LINE__
,
2365 "print_bp_stop_message: unrecognized enum value");
2370 /* Print a message indicating what happened. This is called from
2371 normal_stop(). The input to this routine is the head of the bpstat
2372 list - a list of the eventpoints that caused this stop. This
2373 routine calls the generic print routine for printing a message
2374 about reasons for stopping. This will print (for example) the
2375 "Breakpoint n," part of the output. The return value of this
2378 PRINT_UNKNOWN: Means we printed nothing
2379 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2380 code to print the location. An example is
2381 "Breakpoint 1, " which should be followed by
2383 PRINT_SRC_ONLY: Means we printed something, but there is no need
2384 to also print the location part of the message.
2385 An example is the catch/throw messages, which
2386 don't require a location appended to the end.
2387 PRINT_NOTHING: We have done some printing and we don't need any
2388 further info to be printed.*/
2390 enum print_stop_action
2391 bpstat_print (bpstat bs
)
2395 /* Maybe another breakpoint in the chain caused us to stop.
2396 (Currently all watchpoints go on the bpstat whether hit or not.
2397 That probably could (should) be changed, provided care is taken
2398 with respect to bpstat_explains_signal). */
2399 for (; bs
; bs
= bs
->next
)
2401 val
= print_bp_stop_message (bs
);
2402 if (val
== PRINT_SRC_ONLY
2403 || val
== PRINT_SRC_AND_LOC
2404 || val
== PRINT_NOTHING
)
2408 /* We reached the end of the chain, or we got a null BS to start
2409 with and nothing was printed. */
2410 return PRINT_UNKNOWN
;
2413 /* Evaluate the expression EXP and return 1 if value is zero.
2414 This is used inside a catch_errors to evaluate the breakpoint condition.
2415 The argument is a "struct expression *" that has been cast to char * to
2416 make it pass through catch_errors. */
2419 breakpoint_cond_eval (void *exp
)
2421 struct value
*mark
= value_mark ();
2422 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2423 value_free_to_mark (mark
);
2427 /* Allocate a new bpstat and chain it to the current one. */
2430 bpstat_alloc (struct breakpoint
*b
, bpstat cbs
/* Current "bs" value */ )
2434 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2436 bs
->breakpoint_at
= b
;
2437 /* If the condition is false, etc., don't do the commands. */
2438 bs
->commands
= NULL
;
2440 bs
->print_it
= print_it_normal
;
2444 /* Possible return values for watchpoint_check (this can't be an enum
2445 because of check_errors). */
2446 /* The watchpoint has been deleted. */
2447 #define WP_DELETED 1
2448 /* The value has changed. */
2449 #define WP_VALUE_CHANGED 2
2450 /* The value has not changed. */
2451 #define WP_VALUE_NOT_CHANGED 3
2453 #define BP_TEMPFLAG 1
2454 #define BP_HARDWAREFLAG 2
2456 /* Check watchpoint condition. */
2459 watchpoint_check (void *p
)
2461 bpstat bs
= (bpstat
) p
;
2462 struct breakpoint
*b
;
2463 struct frame_info
*fr
;
2464 int within_current_scope
;
2466 b
= bs
->breakpoint_at
;
2468 if (b
->exp_valid_block
== NULL
)
2469 within_current_scope
= 1;
2472 /* There is no current frame at this moment. If we're going to have
2473 any chance of handling watchpoints on local variables, we'll need
2474 the frame chain (so we can determine if we're in scope). */
2475 reinit_frame_cache ();
2476 fr
= frame_find_by_id (b
->watchpoint_frame
);
2477 within_current_scope
= (fr
!= NULL
);
2478 /* in_function_epilogue_p() returns a non-zero value if we're still
2479 in the function but the stack frame has already been invalidated.
2480 Since we can't rely on the values of local variables after the
2481 stack has been destroyed, we are treating the watchpoint in that
2482 state as `not changed' without further checking.
2484 vinschen/2003-09-04: The former implementation left out the case
2485 that the watchpoint frame couldn't be found by frame_find_by_id()
2486 because the current PC is currently in an epilogue. Calling
2487 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2488 if ((!within_current_scope
|| fr
== get_current_frame ())
2489 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2490 return WP_VALUE_NOT_CHANGED
;
2491 if (fr
&& within_current_scope
)
2492 /* If we end up stopping, the current frame will get selected
2493 in normal_stop. So this call to select_frame won't affect
2498 if (within_current_scope
)
2500 /* We use value_{,free_to_}mark because it could be a
2501 *long* time before we return to the command level and
2502 call free_all_values. We can't call free_all_values because
2503 we might be in the middle of evaluating a function call. */
2505 struct value
*mark
= value_mark ();
2506 struct value
*new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
2507 if (!value_equal (b
->val
, new_val
))
2509 release_value (new_val
);
2510 value_free_to_mark (mark
);
2511 bs
->old_val
= b
->val
;
2513 /* We will stop here */
2514 return WP_VALUE_CHANGED
;
2518 /* Nothing changed, don't do anything. */
2519 value_free_to_mark (mark
);
2520 /* We won't stop here */
2521 return WP_VALUE_NOT_CHANGED
;
2526 /* This seems like the only logical thing to do because
2527 if we temporarily ignored the watchpoint, then when
2528 we reenter the block in which it is valid it contains
2529 garbage (in the case of a function, it may have two
2530 garbage values, one before and one after the prologue).
2531 So we can't even detect the first assignment to it and
2532 watch after that (since the garbage may or may not equal
2533 the first value assigned). */
2534 /* We print all the stop information in print_it_typical(), but
2535 in this case, by the time we call print_it_typical() this bp
2536 will be deleted already. So we have no choice but print the
2537 information here. */
2538 if (ui_out_is_mi_like_p (uiout
))
2539 ui_out_field_string (uiout
, "reason", "watchpoint-scope");
2540 ui_out_text (uiout
, "\nWatchpoint ");
2541 ui_out_field_int (uiout
, "wpnum", bs
->breakpoint_at
->number
);
2542 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2543 which its expression is valid.\n");
2545 if (b
->related_breakpoint
)
2546 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2547 b
->disposition
= disp_del_at_next_stop
;
2553 /* Get a bpstat associated with having just stopped at address
2554 BP_ADDR in thread PTID. STOPPED_BY_WATCHPOINT is 1 if the
2555 target thinks we stopped due to a hardware watchpoint, 0 if we
2556 know we did not trigger a hardware watchpoint, and -1 if we do not know. */
2558 /* Determine whether we stopped at a breakpoint, etc, or whether we
2559 don't understand this stop. Result is a chain of bpstat's such that:
2561 if we don't understand the stop, the result is a null pointer.
2563 if we understand why we stopped, the result is not null.
2565 Each element of the chain refers to a particular breakpoint or
2566 watchpoint at which we have stopped. (We may have stopped for
2567 several reasons concurrently.)
2569 Each element of the chain has valid next, breakpoint_at,
2570 commands, FIXME??? fields. */
2573 bpstat_stop_status (CORE_ADDR bp_addr
, ptid_t ptid
, int stopped_by_watchpoint
)
2575 struct breakpoint
*b
, *temp
;
2576 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2577 int real_breakpoint
= 0;
2578 /* Root of the chain of bpstat's */
2579 struct bpstats root_bs
[1];
2580 /* Pointer to the last thing in the chain currently. */
2581 bpstat bs
= root_bs
;
2582 int thread_id
= pid_to_thread_id (ptid
);
2584 ALL_BREAKPOINTS_SAFE (b
, temp
)
2586 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
2589 if (b
->type
!= bp_watchpoint
2590 && b
->type
!= bp_hardware_watchpoint
2591 && b
->type
!= bp_read_watchpoint
2592 && b
->type
!= bp_access_watchpoint
2593 && b
->type
!= bp_hardware_breakpoint
2594 && b
->type
!= bp_catch_fork
2595 && b
->type
!= bp_catch_vfork
2596 && b
->type
!= bp_catch_exec
2597 && b
->type
!= bp_catch_catch
2598 && b
->type
!= bp_catch_throw
) /* a non-watchpoint bp */
2600 if (b
->loc
->address
!= bp_addr
) /* address doesn't match */
2602 if (overlay_debugging
/* unmapped overlay section */
2603 && section_is_overlay (b
->loc
->section
)
2604 && !section_is_mapped (b
->loc
->section
))
2608 /* Continuable hardware watchpoints are treated as non-existent if the
2609 reason we stopped wasn't a hardware watchpoint (we didn't stop on
2610 some data address). Otherwise gdb won't stop on a break instruction
2611 in the code (not from a breakpoint) when a hardware watchpoint has
2614 if ((b
->type
== bp_hardware_watchpoint
2615 || b
->type
== bp_read_watchpoint
2616 || b
->type
== bp_access_watchpoint
)
2617 && !stopped_by_watchpoint
)
2620 if (b
->type
== bp_hardware_breakpoint
)
2622 if (b
->loc
->address
!= bp_addr
)
2624 if (overlay_debugging
/* unmapped overlay section */
2625 && section_is_overlay (b
->loc
->section
)
2626 && !section_is_mapped (b
->loc
->section
))
2630 /* Is this a catchpoint of a load or unload? If so, did we
2631 get a load or unload of the specified library? If not,
2633 if ((b
->type
== bp_catch_load
)
2634 #if defined(SOLIB_HAVE_LOAD_EVENT)
2635 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2636 || ((b
->dll_pathname
!= NULL
)
2637 && (strcmp (b
->dll_pathname
,
2638 SOLIB_LOADED_LIBRARY_PATHNAME (
2639 PIDGET (inferior_ptid
)))
2645 if ((b
->type
== bp_catch_unload
)
2646 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2647 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2648 || ((b
->dll_pathname
!= NULL
)
2649 && (strcmp (b
->dll_pathname
,
2650 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2651 PIDGET (inferior_ptid
)))
2657 if ((b
->type
== bp_catch_fork
)
2658 && !inferior_has_forked (PIDGET (inferior_ptid
),
2659 &b
->forked_inferior_pid
))
2662 if ((b
->type
== bp_catch_vfork
)
2663 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2664 &b
->forked_inferior_pid
))
2667 if ((b
->type
== bp_catch_exec
)
2668 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2671 if (ep_is_exception_catchpoint (b
) &&
2672 !(current_exception_event
= target_get_current_exception_event ()))
2675 /* Come here if it's a watchpoint, or if the break address matches */
2677 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
2679 /* Watchpoints may change this, if not found to have triggered. */
2683 if (b
->type
== bp_watchpoint
||
2684 b
->type
== bp_hardware_watchpoint
)
2686 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2688 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2689 int e
= catch_errors (watchpoint_check
, bs
, message
,
2691 do_cleanups (cleanups
);
2695 /* We've already printed what needs to be printed. */
2696 /* Actually this is superfluous, because by the time we
2697 call print_it_typical() the wp will be already deleted,
2698 and the function will return immediately. */
2699 bs
->print_it
= print_it_done
;
2702 case WP_VALUE_CHANGED
:
2706 case WP_VALUE_NOT_CHANGED
:
2708 bs
->print_it
= print_it_noop
;
2715 /* Error from catch_errors. */
2716 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2717 if (b
->related_breakpoint
)
2718 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2719 b
->disposition
= disp_del_at_next_stop
;
2720 /* We've already printed what needs to be printed. */
2721 bs
->print_it
= print_it_done
;
2727 else if (b
->type
== bp_read_watchpoint
||
2728 b
->type
== bp_access_watchpoint
)
2734 if (!target_stopped_data_address (¤t_target
, &addr
))
2736 for (v
= b
->val_chain
; v
; v
= v
->next
)
2738 if (VALUE_LVAL (v
) == lval_memory
2739 && ! VALUE_LAZY (v
))
2741 struct type
*vtype
= check_typedef (value_type (v
));
2743 if (v
== b
->val_chain
2744 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
2745 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
2749 vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
2750 /* Exact match not required. Within range is
2752 if (addr
>= vaddr
&&
2753 addr
< vaddr
+ TYPE_LENGTH (value_type (v
)))
2760 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2762 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2763 int e
= catch_errors (watchpoint_check
, bs
, message
,
2765 do_cleanups (cleanups
);
2769 /* We've already printed what needs to be printed. */
2770 bs
->print_it
= print_it_done
;
2773 case WP_VALUE_CHANGED
:
2774 if (b
->type
== bp_read_watchpoint
)
2776 /* Don't stop: read watchpoints shouldn't fire if
2777 the value has changed. This is for targets
2778 which cannot set read-only watchpoints. */
2779 bs
->print_it
= print_it_noop
;
2785 case WP_VALUE_NOT_CHANGED
:
2792 /* Error from catch_errors. */
2793 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2794 if (b
->related_breakpoint
)
2795 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2796 b
->disposition
= disp_del_at_next_stop
;
2797 /* We've already printed what needs to be printed. */
2798 bs
->print_it
= print_it_done
;
2802 else /* found == 0 */
2804 /* This is a case where some watchpoint(s) triggered,
2805 but not at the address of this watchpoint (FOUND
2806 was left zero). So don't print anything for this
2808 bs
->print_it
= print_it_noop
;
2815 /* By definition, an encountered breakpoint is a triggered
2819 real_breakpoint
= 1;
2822 if (frame_id_p (b
->frame_id
)
2823 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2827 int value_is_zero
= 0;
2831 /* Need to select the frame, with all that implies
2832 so that the conditions will have the right context. */
2833 select_frame (get_current_frame ());
2835 = catch_errors (breakpoint_cond_eval
, (b
->cond
),
2836 "Error in testing breakpoint condition:\n",
2838 /* FIXME-someday, should give breakpoint # */
2841 if (b
->cond
&& value_is_zero
)
2844 /* Don't consider this a hit. */
2847 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
2850 /* Don't consider this a hit. */
2853 else if (b
->ignore_count
> 0)
2856 annotate_ignore_count_change ();
2861 /* We will stop here */
2862 if (b
->disposition
== disp_disable
)
2863 b
->enable_state
= bp_disabled
;
2866 bs
->commands
= b
->commands
;
2868 (strcmp ("silent", bs
->commands
->line
) == 0
2869 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
2871 bs
->commands
= bs
->commands
->next
;
2874 bs
->commands
= copy_command_lines (bs
->commands
);
2877 /* Print nothing for this entry if we dont stop or if we dont print. */
2878 if (bs
->stop
== 0 || bs
->print
== 0)
2879 bs
->print_it
= print_it_noop
;
2882 bs
->next
= NULL
; /* Terminate the chain */
2883 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2885 /* The value of a hardware watchpoint hasn't changed, but the
2886 intermediate memory locations we are watching may have. */
2887 if (bs
&& !bs
->stop
&&
2888 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2889 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2890 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2892 remove_breakpoints ();
2893 insert_breakpoints ();
2898 /* Tell what to do about this bpstat. */
2900 bpstat_what (bpstat bs
)
2902 /* Classify each bpstat as one of the following. */
2905 /* This bpstat element has no effect on the main_action. */
2908 /* There was a watchpoint, stop but don't print. */
2911 /* There was a watchpoint, stop and print. */
2914 /* There was a breakpoint but we're not stopping. */
2917 /* There was a breakpoint, stop but don't print. */
2920 /* There was a breakpoint, stop and print. */
2923 /* We hit the longjmp breakpoint. */
2926 /* We hit the longjmp_resume breakpoint. */
2929 /* We hit the step_resume breakpoint. */
2932 /* We hit the through_sigtramp breakpoint. */
2935 /* We hit the shared library event breakpoint. */
2938 /* We caught a shared library event. */
2941 /* This is just used to count how many enums there are. */
2945 /* Here is the table which drives this routine. So that we can
2946 format it pretty, we define some abbreviations for the
2947 enum bpstat_what codes. */
2948 #define kc BPSTAT_WHAT_KEEP_CHECKING
2949 #define ss BPSTAT_WHAT_STOP_SILENT
2950 #define sn BPSTAT_WHAT_STOP_NOISY
2951 #define sgl BPSTAT_WHAT_SINGLE
2952 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2953 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2954 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2955 #define sr BPSTAT_WHAT_STEP_RESUME
2956 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2957 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2958 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2960 /* "Can't happen." Might want to print an error message.
2961 abort() is not out of the question, but chances are GDB is just
2962 a bit confused, not unusable. */
2963 #define err BPSTAT_WHAT_STOP_NOISY
2965 /* Given an old action and a class, come up with a new action. */
2966 /* One interesting property of this table is that wp_silent is the same
2967 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2968 after stopping, the check for whether to step over a breakpoint
2969 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2970 reference to how we stopped. We retain separate wp_silent and
2971 bp_silent codes in case we want to change that someday.
2973 Another possibly interesting property of this table is that
2974 there's a partial ordering, priority-like, of the actions. Once
2975 you've decided that some action is appropriate, you'll never go
2976 back and decide something of a lower priority is better. The
2979 kc < clr sgl shl shlr slr sn sr ss ts
2980 sgl < clrs shl shlr slr sn sr ss ts
2981 slr < err shl shlr sn sr ss ts
2982 clr < clrs err shl shlr sn sr ss ts
2983 clrs < err shl shlr sn sr ss ts
2984 ss < shl shlr sn sr ts
2991 What I think this means is that we don't need a damned table
2992 here. If you just put the rows and columns in the right order,
2993 it'd look awfully regular. We could simply walk the bpstat list
2994 and choose the highest priority action we find, with a little
2995 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
2996 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
2997 is messy anyway). */
2999 /* step_resume entries: a step resume breakpoint overrides another
3000 breakpoint of signal handling (see comment in wait_for_inferior
3001 at where we set the step_resume breakpoint). */
3002 /* We handle the through_sigtramp_breakpoint the same way; having both
3003 one of those and a step_resume_breakpoint is probably very rare (?). */
3005 static const enum bpstat_what_main_action
3006 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3009 /* kc ss sn sgl slr clr clrs sr ts shl shlr
3012 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, ts
, shl
, shlr
},
3014 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3016 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3018 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, ts
, shl
, shlr
},
3020 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3022 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3024 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, ts
, shl
, shlr
},
3026 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, ts
, shl
, shlr
},
3028 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, ts
, shl
, shlr
},
3030 {ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, shl
, shlr
},
3032 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, shl
, ts
, shl
, shlr
},
3034 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, ts
, shlr
, shlr
}
3049 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3050 struct bpstat_what retval
;
3052 retval
.call_dummy
= 0;
3053 for (; bs
!= NULL
; bs
= bs
->next
)
3055 enum class bs_class
= no_effect
;
3056 if (bs
->breakpoint_at
== NULL
)
3057 /* I suspect this can happen if it was a momentary breakpoint
3058 which has since been deleted. */
3060 switch (bs
->breakpoint_at
->type
)
3066 case bp_hardware_breakpoint
:
3072 bs_class
= bp_noisy
;
3074 bs_class
= bp_silent
;
3077 bs_class
= bp_nostop
;
3080 case bp_hardware_watchpoint
:
3081 case bp_read_watchpoint
:
3082 case bp_access_watchpoint
:
3086 bs_class
= wp_noisy
;
3088 bs_class
= wp_silent
;
3091 /* There was a watchpoint, but we're not stopping.
3092 This requires no further action. */
3093 bs_class
= no_effect
;
3096 bs_class
= long_jump
;
3098 case bp_longjmp_resume
:
3099 bs_class
= long_resume
;
3101 case bp_step_resume
:
3104 bs_class
= step_resume
;
3107 /* It is for the wrong frame. */
3108 bs_class
= bp_nostop
;
3110 case bp_through_sigtramp
:
3111 bs_class
= through_sig
;
3113 case bp_watchpoint_scope
:
3114 bs_class
= bp_nostop
;
3116 case bp_shlib_event
:
3117 bs_class
= shlib_event
;
3119 case bp_thread_event
:
3120 case bp_overlay_event
:
3121 bs_class
= bp_nostop
;
3124 case bp_catch_unload
:
3125 /* Only if this catchpoint triggered should we cause the
3126 step-out-of-dld behaviour. Otherwise, we ignore this
3129 bs_class
= catch_shlib_event
;
3131 bs_class
= no_effect
;
3134 case bp_catch_vfork
:
3139 bs_class
= bp_noisy
;
3141 bs_class
= bp_silent
;
3144 /* There was a catchpoint, but we're not stopping.
3145 This requires no further action. */
3146 bs_class
= no_effect
;
3148 case bp_catch_catch
:
3149 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
3150 bs_class
= bp_nostop
;
3152 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3154 case bp_catch_throw
:
3155 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
3156 bs_class
= bp_nostop
;
3158 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3161 /* Make sure the action is stop (silent or noisy),
3162 so infrun.c pops the dummy frame. */
3163 bs_class
= bp_silent
;
3164 retval
.call_dummy
= 1;
3167 current_action
= table
[(int) bs_class
][(int) current_action
];
3169 retval
.main_action
= current_action
;
3173 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3174 without hardware support). This isn't related to a specific bpstat,
3175 just to things like whether watchpoints are set. */
3178 bpstat_should_step (void)
3180 struct breakpoint
*b
;
3182 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
)
3187 /* Nonzero if there are enabled hardware watchpoints. */
3189 bpstat_have_active_hw_watchpoints (void)
3191 struct bp_location
*bpt
;
3192 ALL_BP_LOCATIONS (bpt
)
3193 if (breakpoint_enabled (bpt
->owner
)
3195 && bpt
->loc_type
== bp_loc_hardware_watchpoint
)
3201 /* Given a bpstat that records zero or more triggered eventpoints, this
3202 function returns another bpstat which contains only the catchpoints
3203 on that first list, if any. */
3205 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3207 struct bpstats root_bs
[1];
3208 bpstat bs
= root_bs
;
3209 struct breakpoint
*ep
;
3212 bpstat_clear (cp_list
);
3213 root_bs
->next
= NULL
;
3215 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3217 /* Is this eventpoint a catchpoint? If not, ignore it. */
3218 ep
= ep_list
->breakpoint_at
;
3221 if ((ep
->type
!= bp_catch_load
) &&
3222 (ep
->type
!= bp_catch_unload
) &&
3223 (ep
->type
!= bp_catch_catch
) &&
3224 (ep
->type
!= bp_catch_throw
))
3225 /* pai: (temp) ADD fork/vfork here!! */
3228 /* Yes; add it to the list. */
3229 bs
= bpstat_alloc (ep
, bs
);
3234 #if defined(SOLIB_ADD)
3235 /* Also, for each triggered catchpoint, tag it with the name of
3236 the library that caused this trigger. (We copy the name now,
3237 because it's only guaranteed to be available NOW, when the
3238 catchpoint triggers. Clients who may wish to know the name
3239 later must get it from the catchpoint itself.) */
3240 if (ep
->triggered_dll_pathname
!= NULL
)
3241 xfree (ep
->triggered_dll_pathname
);
3242 if (ep
->type
== bp_catch_load
)
3243 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3244 PIDGET (inferior_ptid
));
3246 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3247 PIDGET (inferior_ptid
));
3249 dll_pathname
= NULL
;
3253 ep
->triggered_dll_pathname
= (char *)
3254 xmalloc (strlen (dll_pathname
) + 1);
3255 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3258 ep
->triggered_dll_pathname
= NULL
;
3264 /* Print B to gdb_stdout. */
3266 print_one_breakpoint (struct breakpoint
*b
,
3267 CORE_ADDR
*last_addr
)
3269 struct command_line
*l
;
3271 struct ep_type_description
3276 static struct ep_type_description bptypes
[] =
3278 {bp_none
, "?deleted?"},
3279 {bp_breakpoint
, "breakpoint"},
3280 {bp_hardware_breakpoint
, "hw breakpoint"},
3281 {bp_until
, "until"},
3282 {bp_finish
, "finish"},
3283 {bp_watchpoint
, "watchpoint"},
3284 {bp_hardware_watchpoint
, "hw watchpoint"},
3285 {bp_read_watchpoint
, "read watchpoint"},
3286 {bp_access_watchpoint
, "acc watchpoint"},
3287 {bp_longjmp
, "longjmp"},
3288 {bp_longjmp_resume
, "longjmp resume"},
3289 {bp_step_resume
, "step resume"},
3290 {bp_through_sigtramp
, "sigtramp"},
3291 {bp_watchpoint_scope
, "watchpoint scope"},
3292 {bp_call_dummy
, "call dummy"},
3293 {bp_shlib_event
, "shlib events"},
3294 {bp_thread_event
, "thread events"},
3295 {bp_overlay_event
, "overlay events"},
3296 {bp_catch_load
, "catch load"},
3297 {bp_catch_unload
, "catch unload"},
3298 {bp_catch_fork
, "catch fork"},
3299 {bp_catch_vfork
, "catch vfork"},
3300 {bp_catch_exec
, "catch exec"},
3301 {bp_catch_catch
, "catch catch"},
3302 {bp_catch_throw
, "catch throw"}
3305 static char *bpdisps
[] =
3306 {"del", "dstp", "dis", "keep"};
3307 static char bpenables
[] = "nynny";
3308 char wrap_indent
[80];
3309 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3310 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3311 struct cleanup
*bkpt_chain
;
3314 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3318 ui_out_field_int (uiout
, "number", b
->number
);
3322 if (((int) b
->type
> (sizeof (bptypes
) / sizeof (bptypes
[0])))
3323 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3324 internal_error (__FILE__
, __LINE__
,
3325 "bptypes table does not describe type #%d.",
3327 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3331 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3335 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3336 ui_out_spaces (uiout
, 2);
3339 strcpy (wrap_indent
, " ");
3342 if (TARGET_ADDR_BIT
<= 32)
3343 strcat (wrap_indent
, " ");
3345 strcat (wrap_indent
, " ");
3348 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3349 b
->ops
->print_one (b
, last_addr
);
3354 internal_error (__FILE__
, __LINE__
,
3355 "print_one_breakpoint: bp_none encountered\n");
3359 case bp_hardware_watchpoint
:
3360 case bp_read_watchpoint
:
3361 case bp_access_watchpoint
:
3362 /* Field 4, the address, is omitted (which makes the columns
3363 not line up too nicely with the headers, but the effect
3364 is relatively readable). */
3366 ui_out_field_skip (uiout
, "addr");
3368 print_expression (b
->exp
, stb
->stream
);
3369 ui_out_field_stream (uiout
, "what", stb
);
3373 case bp_catch_unload
:
3374 /* Field 4, the address, is omitted (which makes the columns
3375 not line up too nicely with the headers, but the effect
3376 is relatively readable). */
3378 ui_out_field_skip (uiout
, "addr");
3380 if (b
->dll_pathname
== NULL
)
3382 ui_out_field_string (uiout
, "what", "<any library>");
3383 ui_out_spaces (uiout
, 1);
3387 ui_out_text (uiout
, "library \"");
3388 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3389 ui_out_text (uiout
, "\" ");
3394 case bp_catch_vfork
:
3395 /* Field 4, the address, is omitted (which makes the columns
3396 not line up too nicely with the headers, but the effect
3397 is relatively readable). */
3399 ui_out_field_skip (uiout
, "addr");
3401 if (b
->forked_inferior_pid
!= 0)
3403 ui_out_text (uiout
, "process ");
3404 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3405 ui_out_spaces (uiout
, 1);
3409 /* Field 4, the address, is omitted (which makes the columns
3410 not line up too nicely with the headers, but the effect
3411 is relatively readable). */
3413 ui_out_field_skip (uiout
, "addr");
3415 if (b
->exec_pathname
!= NULL
)
3417 ui_out_text (uiout
, "program \"");
3418 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3419 ui_out_text (uiout
, "\" ");
3423 case bp_catch_catch
:
3424 /* Field 4, the address, is omitted (which makes the columns
3425 not line up too nicely with the headers, but the effect
3426 is relatively readable). */
3428 ui_out_field_skip (uiout
, "addr");
3430 ui_out_field_string (uiout
, "what", "exception catch");
3431 ui_out_spaces (uiout
, 1);
3434 case bp_catch_throw
:
3435 /* Field 4, the address, is omitted (which makes the columns
3436 not line up too nicely with the headers, but the effect
3437 is relatively readable). */
3439 ui_out_field_skip (uiout
, "addr");
3441 ui_out_field_string (uiout
, "what", "exception throw");
3442 ui_out_spaces (uiout
, 1);
3446 case bp_hardware_breakpoint
:
3450 case bp_longjmp_resume
:
3451 case bp_step_resume
:
3452 case bp_through_sigtramp
:
3453 case bp_watchpoint_scope
:
3455 case bp_shlib_event
:
3456 case bp_thread_event
:
3457 case bp_overlay_event
:
3462 ui_out_field_string (uiout
, "addr", "<PENDING>");
3464 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
3467 *last_addr
= b
->loc
->address
;
3470 sym
= find_pc_sect_function (b
->loc
->address
, b
->loc
->section
);
3473 ui_out_text (uiout
, "in ");
3474 ui_out_field_string (uiout
, "func",
3475 SYMBOL_PRINT_NAME (sym
));
3476 ui_out_wrap_hint (uiout
, wrap_indent
);
3477 ui_out_text (uiout
, " at ");
3479 ui_out_field_string (uiout
, "file", b
->source_file
);
3480 ui_out_text (uiout
, ":");
3481 ui_out_field_int (uiout
, "line", b
->line_number
);
3483 else if (b
->pending
)
3485 ui_out_field_string (uiout
, "pending", b
->addr_string
);
3489 print_address_symbolic (b
->loc
->address
, stb
->stream
, demangle
, "");
3490 ui_out_field_stream (uiout
, "at", stb
);
3495 if (b
->thread
!= -1)
3497 /* FIXME: This seems to be redundant and lost here; see the
3498 "stop only in" line a little further down. */
3499 ui_out_text (uiout
, " thread ");
3500 ui_out_field_int (uiout
, "thread", b
->thread
);
3503 ui_out_text (uiout
, "\n");
3505 if (frame_id_p (b
->frame_id
))
3508 ui_out_text (uiout
, "\tstop only in stack frame at ");
3509 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3511 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3512 ui_out_text (uiout
, "\n");
3518 ui_out_text (uiout
, "\tstop only if ");
3519 print_expression (b
->cond
, stb
->stream
);
3520 ui_out_field_stream (uiout
, "cond", stb
);
3521 ui_out_text (uiout
, "\n");
3524 if (b
->pending
&& b
->cond_string
)
3527 ui_out_text (uiout
, "\tstop only if ");
3528 ui_out_field_string (uiout
, "cond", b
->cond_string
);
3529 ui_out_text (uiout
, "\n");
3532 if (b
->thread
!= -1)
3534 /* FIXME should make an annotation for this */
3535 ui_out_text (uiout
, "\tstop only in thread ");
3536 ui_out_field_int (uiout
, "thread", b
->thread
);
3537 ui_out_text (uiout
, "\n");
3540 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3542 /* FIXME should make an annotation for this */
3543 if (ep_is_catchpoint (b
))
3544 ui_out_text (uiout
, "\tcatchpoint");
3546 ui_out_text (uiout
, "\tbreakpoint");
3547 ui_out_text (uiout
, " already hit ");
3548 ui_out_field_int (uiout
, "times", b
->hit_count
);
3549 if (b
->hit_count
== 1)
3550 ui_out_text (uiout
, " time\n");
3552 ui_out_text (uiout
, " times\n");
3555 /* Output the count also if it is zero, but only if this is
3556 mi. FIXME: Should have a better test for this. */
3557 if (ui_out_is_mi_like_p (uiout
))
3558 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3559 ui_out_field_int (uiout
, "times", b
->hit_count
);
3561 if (b
->ignore_count
)
3564 ui_out_text (uiout
, "\tignore next ");
3565 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3566 ui_out_text (uiout
, " hits\n");
3569 if ((l
= b
->commands
))
3571 struct cleanup
*script_chain
;
3574 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3575 print_command_lines (uiout
, l
, 4);
3576 do_cleanups (script_chain
);
3578 do_cleanups (bkpt_chain
);
3579 do_cleanups (old_chain
);
3582 struct captured_breakpoint_query_args
3588 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3590 struct captured_breakpoint_query_args
*args
= data
;
3591 struct breakpoint
*b
;
3592 CORE_ADDR dummy_addr
= 0;
3595 if (args
->bnum
== b
->number
)
3597 print_one_breakpoint (b
, &dummy_addr
);
3605 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
)
3607 struct captured_breakpoint_query_args args
;
3609 /* For the moment we don't trust print_one_breakpoint() to not throw
3611 return catch_exceptions (uiout
, do_captured_breakpoint_query
, &args
,
3612 NULL
, RETURN_MASK_ALL
);
3615 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3616 catchpoints, et.al.). */
3619 user_settable_breakpoint (const struct breakpoint
*b
)
3621 return (b
->type
== bp_breakpoint
3622 || b
->type
== bp_catch_load
3623 || b
->type
== bp_catch_unload
3624 || b
->type
== bp_catch_fork
3625 || b
->type
== bp_catch_vfork
3626 || b
->type
== bp_catch_exec
3627 || b
->type
== bp_catch_catch
3628 || b
->type
== bp_catch_throw
3629 || b
->type
== bp_hardware_breakpoint
3630 || b
->type
== bp_watchpoint
3631 || b
->type
== bp_read_watchpoint
3632 || b
->type
== bp_access_watchpoint
3633 || b
->type
== bp_hardware_watchpoint
);
3636 /* Print information on user settable breakpoint (watchpoint, etc)
3637 number BNUM. If BNUM is -1 print all user settable breakpoints.
3638 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3641 breakpoint_1 (int bnum
, int allflag
)
3643 struct breakpoint
*b
;
3644 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3645 int nr_printable_breakpoints
;
3646 struct cleanup
*bkpttbl_chain
;
3648 /* Compute the number of rows in the table. */
3649 nr_printable_breakpoints
= 0;
3652 || bnum
== b
->number
)
3654 if (allflag
|| user_settable_breakpoint (b
))
3655 nr_printable_breakpoints
++;
3660 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3664 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3667 if (nr_printable_breakpoints
> 0)
3668 annotate_breakpoints_headers ();
3669 if (nr_printable_breakpoints
> 0)
3671 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3672 if (nr_printable_breakpoints
> 0)
3674 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3675 if (nr_printable_breakpoints
> 0)
3677 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3678 if (nr_printable_breakpoints
> 0)
3680 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3683 if (nr_printable_breakpoints
> 0)
3685 if (TARGET_ADDR_BIT
<= 32)
3686 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3688 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3690 if (nr_printable_breakpoints
> 0)
3692 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3693 ui_out_table_body (uiout
);
3694 if (nr_printable_breakpoints
> 0)
3695 annotate_breakpoints_table ();
3699 || bnum
== b
->number
)
3701 /* We only print out user settable breakpoints unless the
3703 if (allflag
|| user_settable_breakpoint (b
))
3704 print_one_breakpoint (b
, &last_addr
);
3707 do_cleanups (bkpttbl_chain
);
3709 if (nr_printable_breakpoints
== 0)
3712 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3714 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3719 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3720 that a comparison of an unsigned with -1 is always false. */
3721 if (last_addr
!= (CORE_ADDR
) -1)
3722 set_next_address (last_addr
);
3725 /* FIXME? Should this be moved up so that it is only called when
3726 there have been breakpoints? */
3727 annotate_breakpoints_table_end ();
3731 breakpoints_info (char *bnum_exp
, int from_tty
)
3736 bnum
= parse_and_eval_long (bnum_exp
);
3738 breakpoint_1 (bnum
, 0);
3742 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3747 bnum
= parse_and_eval_long (bnum_exp
);
3749 breakpoint_1 (bnum
, 1);
3752 /* Print a message describing any breakpoints set at PC. */
3755 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
)
3758 struct breakpoint
*b
;
3761 if (b
->loc
->address
== pc
) /* address match / overlay match */
3762 if (!b
->pending
&& (!overlay_debugging
|| b
->loc
->section
== section
))
3766 printf_filtered ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
3768 if (b
->loc
->address
== pc
) /* address match / overlay match */
3769 if (!b
->pending
&& (!overlay_debugging
|| b
->loc
->section
== section
))
3772 printf_filtered ("%d%s%s ",
3774 ((b
->enable_state
== bp_disabled
||
3775 b
->enable_state
== bp_shlib_disabled
||
3776 b
->enable_state
== bp_call_disabled
)
3778 : b
->enable_state
== bp_permanent
3782 : ((others
== 1) ? " and" : ""));
3784 printf_filtered ("also set at pc ");
3785 print_address_numeric (pc
, 1, gdb_stdout
);
3786 printf_filtered (".\n");
3790 /* Set the default place to put a breakpoint
3791 for the `break' command with no arguments. */
3794 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3797 default_breakpoint_valid
= valid
;
3798 default_breakpoint_address
= addr
;
3799 default_breakpoint_symtab
= symtab
;
3800 default_breakpoint_line
= line
;
3803 /* Return true iff it is meaningful to use the address member of
3804 BPT. For some breakpoint types, the address member is irrelevant
3805 and it makes no sense to attempt to compare it to other addresses
3806 (or use it for any other purpose either).
3808 More specifically, each of the following breakpoint types will always
3809 have a zero valued address and we don't want check_duplicates() to mark
3810 breakpoints of any of these types to be a duplicate of an actual
3811 breakpoint at address zero:
3814 bp_hardware_watchpoint
3816 bp_access_watchpoint
3823 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3825 enum bptype type
= bpt
->type
;
3827 return (type
!= bp_watchpoint
3828 && type
!= bp_hardware_watchpoint
3829 && type
!= bp_read_watchpoint
3830 && type
!= bp_access_watchpoint
3831 && type
!= bp_catch_exec
3832 && type
!= bp_longjmp_resume
3833 && type
!= bp_catch_fork
3834 && type
!= bp_catch_vfork
);
3837 /* Rescan breakpoints at the same address and section as BPT,
3838 marking the first one as "first" and any others as "duplicates".
3839 This is so that the bpt instruction is only inserted once.
3840 If we have a permanent breakpoint at the same place as BPT, make
3841 that one the official one, and the rest as duplicates. */
3844 check_duplicates (struct breakpoint
*bpt
)
3846 struct bp_location
*b
;
3848 struct bp_location
*perm_bp
= 0;
3849 CORE_ADDR address
= bpt
->loc
->address
;
3850 asection
*section
= bpt
->loc
->section
;
3852 if (! breakpoint_address_is_meaningful (bpt
))
3855 ALL_BP_LOCATIONS (b
)
3856 if (b
->owner
->enable_state
!= bp_disabled
3857 && b
->owner
->enable_state
!= bp_shlib_disabled
3858 && !b
->owner
->pending
3859 && b
->owner
->enable_state
!= bp_call_disabled
3860 && b
->address
== address
/* address / overlay match */
3861 && (!overlay_debugging
|| b
->section
== section
)
3862 && breakpoint_address_is_meaningful (b
->owner
))
3864 /* Have we found a permanent breakpoint? */
3865 if (b
->owner
->enable_state
== bp_permanent
)
3872 b
->duplicate
= count
> 1;
3875 /* If we found a permanent breakpoint at this address, go over the
3876 list again and declare all the other breakpoints there to be the
3880 perm_bp
->duplicate
= 0;
3882 /* Permanent breakpoint should always be inserted. */
3883 if (! perm_bp
->inserted
)
3884 internal_error (__FILE__
, __LINE__
,
3885 "allegedly permanent breakpoint is not "
3886 "actually inserted");
3888 ALL_BP_LOCATIONS (b
)
3891 if (b
->owner
->enable_state
!= bp_disabled
3892 && b
->owner
->enable_state
!= bp_shlib_disabled
3893 && !b
->owner
->pending
3894 && b
->owner
->enable_state
!= bp_call_disabled
3895 && b
->address
== address
/* address / overlay match */
3896 && (!overlay_debugging
|| b
->section
== section
)
3897 && breakpoint_address_is_meaningful (b
->owner
))
3900 internal_error (__FILE__
, __LINE__
,
3901 "another breakpoint was inserted on top of "
3902 "a permanent breakpoint");
3911 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
3912 int bnum
, int have_bnum
)
3917 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
3918 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
3920 warning ("Breakpoint %d address previously adjusted from %s to %s.",
3921 bnum
, astr1
, astr2
);
3923 warning ("Breakpoint address adjusted from %s to %s.", astr1
, astr2
);
3926 /* Adjust a breakpoint's address to account for architectural constraints
3927 on breakpoint placement. Return the adjusted address. Note: Very
3928 few targets require this kind of adjustment. For most targets,
3929 this function is simply the identity function. */
3932 adjust_breakpoint_address (CORE_ADDR bpaddr
, enum bptype bptype
)
3934 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
3936 /* Very few targets need any kind of breakpoint adjustment. */
3939 else if (bptype
== bp_watchpoint
3940 || bptype
== bp_hardware_watchpoint
3941 || bptype
== bp_read_watchpoint
3942 || bptype
== bp_access_watchpoint
3943 || bptype
== bp_catch_fork
3944 || bptype
== bp_catch_vfork
3945 || bptype
== bp_catch_exec
)
3947 /* Watchpoints and the various bp_catch_* eventpoints should not
3948 have their addresses modified. */
3953 CORE_ADDR adjusted_bpaddr
;
3955 /* Some targets have architectural constraints on the placement
3956 of breakpoint instructions. Obtain the adjusted address. */
3957 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
3960 /* An adjusted breakpoint address can significantly alter
3961 a user's expectations. Print a warning if an adjustment
3963 if (adjusted_bpaddr
!= bpaddr
)
3964 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
3966 return adjusted_bpaddr
;
3970 /* Allocate a struct bp_location. */
3972 static struct bp_location
*
3973 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
)
3975 struct bp_location
*loc
, *loc_p
;
3977 loc
= xmalloc (sizeof (struct bp_location
));
3978 memset (loc
, 0, sizeof (*loc
));
3988 case bp_longjmp_resume
:
3989 case bp_step_resume
:
3990 case bp_through_sigtramp
:
3991 case bp_watchpoint_scope
:
3993 case bp_shlib_event
:
3994 case bp_thread_event
:
3995 case bp_overlay_event
:
3997 case bp_catch_unload
:
3998 loc
->loc_type
= bp_loc_software_breakpoint
;
4000 case bp_hardware_breakpoint
:
4001 loc
->loc_type
= bp_loc_hardware_breakpoint
;
4003 case bp_hardware_watchpoint
:
4004 case bp_read_watchpoint
:
4005 case bp_access_watchpoint
:
4006 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4010 case bp_catch_vfork
:
4012 case bp_catch_catch
:
4013 case bp_catch_throw
:
4014 loc
->loc_type
= bp_loc_other
;
4017 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
4020 /* Add this breakpoint to the end of the chain. */
4022 loc_p
= bp_location_chain
;
4024 bp_location_chain
= loc
;
4028 loc_p
= loc_p
->next
;
4035 /* set_raw_breakpoint() is a low level routine for allocating and
4036 partially initializing a breakpoint of type BPTYPE. The newly
4037 created breakpoint's address, section, source file name, and line
4038 number are provided by SAL. The newly created and partially
4039 initialized breakpoint is added to the breakpoint chain and
4040 is also returned as the value of this function.
4042 It is expected that the caller will complete the initialization of
4043 the newly created breakpoint struct as well as output any status
4044 information regarding the creation of a new breakpoint. In
4045 particular, set_raw_breakpoint() does NOT set the breakpoint
4046 number! Care should be taken to not allow an error() to occur
4047 prior to completing the initialization of the breakpoint. If this
4048 should happen, a bogus breakpoint will be left on the chain. */
4051 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4053 struct breakpoint
*b
, *b1
;
4055 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4056 memset (b
, 0, sizeof (*b
));
4057 b
->loc
= allocate_bp_location (b
, bptype
);
4058 b
->loc
->requested_address
= sal
.pc
;
4059 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
,
4061 if (sal
.symtab
== NULL
)
4062 b
->source_file
= NULL
;
4064 b
->source_file
= savestring (sal
.symtab
->filename
,
4065 strlen (sal
.symtab
->filename
));
4066 b
->loc
->section
= sal
.section
;
4068 b
->language
= current_language
->la_language
;
4069 b
->input_radix
= input_radix
;
4071 b
->line_number
= sal
.line
;
4072 b
->enable_state
= bp_enabled
;
4075 b
->ignore_count
= 0;
4077 b
->frame_id
= null_frame_id
;
4078 b
->dll_pathname
= NULL
;
4079 b
->triggered_dll_pathname
= NULL
;
4080 b
->forked_inferior_pid
= 0;
4081 b
->exec_pathname
= NULL
;
4085 /* Add this breakpoint to the end of the chain
4086 so that a list of breakpoints will come out in order
4087 of increasing numbers. */
4089 b1
= breakpoint_chain
;
4091 breakpoint_chain
= b
;
4099 check_duplicates (b
);
4100 breakpoints_changed ();
4106 /* Note that the breakpoint object B describes a permanent breakpoint
4107 instruction, hard-wired into the inferior's code. */
4109 make_breakpoint_permanent (struct breakpoint
*b
)
4111 b
->enable_state
= bp_permanent
;
4113 /* By definition, permanent breakpoints are already present in the code. */
4114 b
->loc
->inserted
= 1;
4117 static struct breakpoint
*
4118 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4120 static int internal_breakpoint_number
= -1;
4121 struct symtab_and_line sal
;
4122 struct breakpoint
*b
;
4124 init_sal (&sal
); /* initialize to zeroes */
4127 sal
.section
= find_pc_overlay (sal
.pc
);
4129 b
= set_raw_breakpoint (sal
, type
);
4130 b
->number
= internal_breakpoint_number
--;
4131 b
->disposition
= disp_donttouch
;
4138 create_longjmp_breakpoint (char *func_name
)
4140 struct breakpoint
*b
;
4141 struct minimal_symbol
*m
;
4143 if (func_name
== NULL
)
4144 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
4147 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4150 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4153 b
->enable_state
= bp_disabled
;
4156 b
->addr_string
= xstrdup (func_name
);
4159 /* Call this routine when stepping and nexting to enable a breakpoint
4160 if we do a longjmp(). When we hit that breakpoint, call
4161 set_longjmp_resume_breakpoint() to figure out where we are going. */
4164 enable_longjmp_breakpoint (void)
4166 struct breakpoint
*b
;
4169 if (b
->type
== bp_longjmp
)
4171 b
->enable_state
= bp_enabled
;
4172 check_duplicates (b
);
4177 disable_longjmp_breakpoint (void)
4179 struct breakpoint
*b
;
4182 if (b
->type
== bp_longjmp
4183 || b
->type
== bp_longjmp_resume
)
4185 b
->enable_state
= bp_disabled
;
4186 check_duplicates (b
);
4191 create_overlay_event_breakpoint (char *func_name
)
4193 struct breakpoint
*b
;
4194 struct minimal_symbol
*m
;
4196 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4199 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4201 b
->addr_string
= xstrdup (func_name
);
4203 if (overlay_debugging
== ovly_auto
)
4205 b
->enable_state
= bp_enabled
;
4206 overlay_events_enabled
= 1;
4210 b
->enable_state
= bp_disabled
;
4211 overlay_events_enabled
= 0;
4216 enable_overlay_breakpoints (void)
4218 struct breakpoint
*b
;
4221 if (b
->type
== bp_overlay_event
)
4223 b
->enable_state
= bp_enabled
;
4224 check_duplicates (b
);
4225 overlay_events_enabled
= 1;
4230 disable_overlay_breakpoints (void)
4232 struct breakpoint
*b
;
4235 if (b
->type
== bp_overlay_event
)
4237 b
->enable_state
= bp_disabled
;
4238 check_duplicates (b
);
4239 overlay_events_enabled
= 0;
4244 create_thread_event_breakpoint (CORE_ADDR address
)
4246 struct breakpoint
*b
;
4248 b
= create_internal_breakpoint (address
, bp_thread_event
);
4250 b
->enable_state
= bp_enabled
;
4251 /* addr_string has to be used or breakpoint_re_set will delete me. */
4252 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4258 remove_thread_event_breakpoints (void)
4260 struct breakpoint
*b
, *temp
;
4262 ALL_BREAKPOINTS_SAFE (b
, temp
)
4263 if (b
->type
== bp_thread_event
)
4264 delete_breakpoint (b
);
4267 struct captured_parse_breakpoint_args
4270 struct symtabs_and_lines
*sals_p
;
4271 char ***addr_string_p
;
4275 struct lang_and_radix
4281 /* Cleanup helper routine to restore the current language and
4284 do_restore_lang_radix_cleanup (void *old
)
4286 struct lang_and_radix
*p
= old
;
4287 set_language (p
->lang
);
4288 input_radix
= p
->radix
;
4291 /* Try and resolve a pending breakpoint. */
4293 resolve_pending_breakpoint (struct breakpoint
*b
)
4295 /* Try and reparse the breakpoint in case the shared library
4297 struct symtabs_and_lines sals
;
4298 struct symtab_and_line pending_sal
;
4299 char **cond_string
= (char **) NULL
;
4300 char *copy_arg
= b
->addr_string
;
4305 struct ui_file
*old_gdb_stderr
;
4306 struct lang_and_radix old_lr
;
4307 struct cleanup
*old_chain
;
4309 /* Set language, input-radix, then reissue breakpoint command.
4310 Ensure the language and input-radix are restored afterwards. */
4311 old_lr
.lang
= current_language
->la_language
;
4312 old_lr
.radix
= input_radix
;
4313 old_chain
= make_cleanup (do_restore_lang_radix_cleanup
, &old_lr
);
4315 set_language (b
->language
);
4316 input_radix
= b
->input_radix
;
4317 rc
= break_command_1 (b
->addr_string
, b
->flag
, b
->from_tty
, b
);
4319 if (rc
== GDB_RC_OK
)
4320 /* Pending breakpoint has been resolved. */
4321 printf_filtered ("Pending breakpoint \"%s\" resolved\n", b
->addr_string
);
4323 do_cleanups (old_chain
);
4329 remove_solib_event_breakpoints (void)
4331 struct breakpoint
*b
, *temp
;
4333 ALL_BREAKPOINTS_SAFE (b
, temp
)
4334 if (b
->type
== bp_shlib_event
)
4335 delete_breakpoint (b
);
4339 create_solib_event_breakpoint (CORE_ADDR address
)
4341 struct breakpoint
*b
;
4343 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4347 /* Disable any breakpoints that are on code in shared libraries. Only
4348 apply to enabled breakpoints, disabled ones can just stay disabled. */
4351 disable_breakpoints_in_shlibs (int silent
)
4353 struct breakpoint
*b
;
4354 int disabled_shlib_breaks
= 0;
4356 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4359 #if defined (PC_SOLIB)
4360 if (((b
->type
== bp_breakpoint
) ||
4361 (b
->type
== bp_hardware_breakpoint
)) &&
4362 breakpoint_enabled (b
) &&
4363 !b
->loc
->duplicate
&&
4364 PC_SOLIB (b
->loc
->address
))
4366 b
->enable_state
= bp_shlib_disabled
;
4369 if (!disabled_shlib_breaks
)
4371 target_terminal_ours_for_output ();
4372 warning ("Temporarily disabling shared library breakpoints:");
4374 disabled_shlib_breaks
= 1;
4375 warning ("breakpoint #%d ", b
->number
);
4382 /* Disable any breakpoints that are in in an unloaded shared library. Only
4383 apply to enabled breakpoints, disabled ones can just stay disabled. */
4386 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
4388 struct breakpoint
*b
;
4389 int disabled_shlib_breaks
= 0;
4391 #if defined (PC_SOLIB)
4392 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4395 if ((b
->loc
->loc_type
== bp_loc_hardware_breakpoint
4396 || b
->loc
->loc_type
== bp_loc_software_breakpoint
)
4397 && breakpoint_enabled (b
)
4398 && !b
->loc
->duplicate
)
4400 char *so_name
= PC_SOLIB (b
->loc
->address
);
4402 && !strcmp (so_name
, solib
->so_name
))
4404 b
->enable_state
= bp_shlib_disabled
;
4405 /* At this point, we cannot rely on remove_breakpoint
4406 succeeding so we must mark the breakpoint as not inserted
4407 to prevent future errors occurring in remove_breakpoints. */
4408 b
->loc
->inserted
= 0;
4409 if (!disabled_shlib_breaks
)
4411 target_terminal_ours_for_output ();
4412 warning ("Temporarily disabling breakpoints for unloaded shared library \"%s\"",
4415 disabled_shlib_breaks
= 1;
4422 /* Try to reenable any breakpoints in shared libraries. */
4424 re_enable_breakpoints_in_shlibs (void)
4426 struct breakpoint
*b
, *tmp
;
4428 ALL_BREAKPOINTS_SAFE (b
, tmp
)
4430 if (b
->enable_state
== bp_shlib_disabled
)
4434 /* Do not reenable the breakpoint if the shared library
4435 is still not mapped in. */
4436 lib
= PC_SOLIB (b
->loc
->address
);
4437 if (lib
!= NULL
&& target_read_memory (b
->loc
->address
, buf
, 1) == 0)
4438 b
->enable_state
= bp_enabled
;
4440 else if (b
->pending
&& (b
->enable_state
== bp_enabled
))
4442 if (resolve_pending_breakpoint (b
) == GDB_RC_OK
)
4443 delete_breakpoint (b
);
4451 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
4452 char *cond_string
, enum bptype bp_kind
)
4454 struct breakpoint
*b
;
4455 struct symtabs_and_lines sals
;
4456 struct cleanup
*old_chain
;
4457 struct cleanup
*canonical_strings_chain
= NULL
;
4458 char *addr_start
= hookname
;
4459 char *addr_end
= NULL
;
4460 char **canonical
= (char **) NULL
;
4461 int thread
= -1; /* All threads. */
4463 /* Set a breakpoint on the specified hook. */
4464 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
, 0, &canonical
, NULL
);
4465 addr_end
= hookname
;
4467 if (sals
.nelts
== 0)
4469 warning ("Unable to set a breakpoint on dynamic linker callback.");
4470 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4471 warning ("GDB will be unable to track shl_load/shl_unload calls");
4474 if (sals
.nelts
!= 1)
4476 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4477 warning ("GDB will be unable to track shl_load/shl_unload calls");
4481 /* Make sure that all storage allocated in decode_line_1 gets freed
4482 in case the following errors out. */
4483 old_chain
= make_cleanup (xfree
, sals
.sals
);
4484 if (canonical
!= (char **) NULL
)
4486 make_cleanup (xfree
, canonical
);
4487 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
4488 if (canonical
[0] != NULL
)
4489 make_cleanup (xfree
, canonical
[0]);
4492 resolve_sal_pc (&sals
.sals
[0]);
4494 /* Remove the canonical strings from the cleanup, they are needed below. */
4495 if (canonical
!= (char **) NULL
)
4496 discard_cleanups (canonical_strings_chain
);
4498 b
= set_raw_breakpoint (sals
.sals
[0], bp_kind
);
4499 set_breakpoint_count (breakpoint_count
+ 1);
4500 b
->number
= breakpoint_count
;
4502 b
->cond_string
= (cond_string
== NULL
) ?
4503 NULL
: savestring (cond_string
, strlen (cond_string
));
4506 if (canonical
!= (char **) NULL
&& canonical
[0] != NULL
)
4507 b
->addr_string
= canonical
[0];
4508 else if (addr_start
)
4509 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
4511 b
->enable_state
= bp_enabled
;
4512 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4514 if (dll_pathname
== NULL
)
4515 b
->dll_pathname
= NULL
;
4518 b
->dll_pathname
= (char *) xmalloc (strlen (dll_pathname
) + 1);
4519 strcpy (b
->dll_pathname
, dll_pathname
);
4523 do_cleanups (old_chain
);
4527 create_solib_load_event_breakpoint (char *hookname
, int tempflag
,
4528 char *dll_pathname
, char *cond_string
)
4530 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4531 cond_string
, bp_catch_load
);
4535 create_solib_unload_event_breakpoint (char *hookname
, int tempflag
,
4536 char *dll_pathname
, char *cond_string
)
4538 solib_load_unload_1 (hookname
,tempflag
, dll_pathname
,
4539 cond_string
, bp_catch_unload
);
4543 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4544 enum bptype bp_kind
)
4546 struct symtab_and_line sal
;
4547 struct breakpoint
*b
;
4548 int thread
= -1; /* All threads. */
4555 b
= set_raw_breakpoint (sal
, bp_kind
);
4556 set_breakpoint_count (breakpoint_count
+ 1);
4557 b
->number
= breakpoint_count
;
4559 b
->cond_string
= (cond_string
== NULL
) ?
4560 NULL
: savestring (cond_string
, strlen (cond_string
));
4562 b
->addr_string
= NULL
;
4563 b
->enable_state
= bp_enabled
;
4564 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4565 b
->forked_inferior_pid
= 0;
4571 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4573 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4577 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4579 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4583 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4585 struct symtab_and_line sal
;
4586 struct breakpoint
*b
;
4587 int thread
= -1; /* All threads. */
4594 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4595 set_breakpoint_count (breakpoint_count
+ 1);
4596 b
->number
= breakpoint_count
;
4598 b
->cond_string
= (cond_string
== NULL
) ?
4599 NULL
: savestring (cond_string
, strlen (cond_string
));
4601 b
->addr_string
= NULL
;
4602 b
->enable_state
= bp_enabled
;
4603 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4609 hw_breakpoint_used_count (void)
4611 struct breakpoint
*b
;
4616 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4624 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4626 struct breakpoint
*b
;
4629 *other_type_used
= 0;
4632 if (breakpoint_enabled (b
))
4634 if (b
->type
== type
)
4636 else if ((b
->type
== bp_hardware_watchpoint
||
4637 b
->type
== bp_read_watchpoint
||
4638 b
->type
== bp_access_watchpoint
))
4639 *other_type_used
= 1;
4645 /* Call this after hitting the longjmp() breakpoint. Use this to set
4646 a new breakpoint at the target of the jmp_buf.
4648 FIXME - This ought to be done by setting a temporary breakpoint
4649 that gets deleted automatically... */
4652 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_id frame_id
)
4654 struct breakpoint
*b
;
4657 if (b
->type
== bp_longjmp_resume
)
4659 b
->loc
->requested_address
= pc
;
4660 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
,
4662 b
->enable_state
= bp_enabled
;
4663 b
->frame_id
= frame_id
;
4664 check_duplicates (b
);
4670 disable_watchpoints_before_interactive_call_start (void)
4672 struct breakpoint
*b
;
4676 if (((b
->type
== bp_watchpoint
)
4677 || (b
->type
== bp_hardware_watchpoint
)
4678 || (b
->type
== bp_read_watchpoint
)
4679 || (b
->type
== bp_access_watchpoint
)
4680 || ep_is_exception_catchpoint (b
))
4681 && breakpoint_enabled (b
))
4683 b
->enable_state
= bp_call_disabled
;
4684 check_duplicates (b
);
4690 enable_watchpoints_after_interactive_call_stop (void)
4692 struct breakpoint
*b
;
4696 if (((b
->type
== bp_watchpoint
)
4697 || (b
->type
== bp_hardware_watchpoint
)
4698 || (b
->type
== bp_read_watchpoint
)
4699 || (b
->type
== bp_access_watchpoint
)
4700 || ep_is_exception_catchpoint (b
))
4701 && (b
->enable_state
== bp_call_disabled
))
4703 b
->enable_state
= bp_enabled
;
4704 check_duplicates (b
);
4710 /* Set a breakpoint that will evaporate an end of command
4711 at address specified by SAL.
4712 Restrict it to frame FRAME if FRAME is nonzero. */
4715 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4718 struct breakpoint
*b
;
4719 b
= set_raw_breakpoint (sal
, type
);
4720 b
->enable_state
= bp_enabled
;
4721 b
->disposition
= disp_donttouch
;
4722 b
->frame_id
= frame_id
;
4724 /* If we're debugging a multi-threaded program, then we
4725 want momentary breakpoints to be active in only a
4726 single thread of control. */
4727 if (in_thread_list (inferior_ptid
))
4728 b
->thread
= pid_to_thread_id (inferior_ptid
);
4734 /* Tell the user we have just set a breakpoint B. */
4737 mention (struct breakpoint
*b
)
4740 struct cleanup
*old_chain
, *ui_out_chain
;
4741 struct ui_stream
*stb
;
4743 stb
= ui_out_stream_new (uiout
);
4744 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4746 /* FIXME: This is misplaced; mention() is called by things (like
4747 hitting a watchpoint) other than breakpoint creation. It should
4748 be possible to clean this up and at the same time replace the
4749 random calls to breakpoint_changed with this hook, as has already
4750 been done for deprecated_delete_breakpoint_hook and so on. */
4751 if (deprecated_create_breakpoint_hook
)
4752 deprecated_create_breakpoint_hook (b
);
4753 breakpoint_create_event (b
->number
);
4755 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4756 b
->ops
->print_mention (b
);
4761 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b
->number
);
4764 ui_out_text (uiout
, "Watchpoint ");
4765 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4766 ui_out_field_int (uiout
, "number", b
->number
);
4767 ui_out_text (uiout
, ": ");
4768 print_expression (b
->exp
, stb
->stream
);
4769 ui_out_field_stream (uiout
, "exp", stb
);
4770 do_cleanups (ui_out_chain
);
4772 case bp_hardware_watchpoint
:
4773 ui_out_text (uiout
, "Hardware watchpoint ");
4774 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4775 ui_out_field_int (uiout
, "number", b
->number
);
4776 ui_out_text (uiout
, ": ");
4777 print_expression (b
->exp
, stb
->stream
);
4778 ui_out_field_stream (uiout
, "exp", stb
);
4779 do_cleanups (ui_out_chain
);
4781 case bp_read_watchpoint
:
4782 ui_out_text (uiout
, "Hardware read watchpoint ");
4783 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4784 ui_out_field_int (uiout
, "number", b
->number
);
4785 ui_out_text (uiout
, ": ");
4786 print_expression (b
->exp
, stb
->stream
);
4787 ui_out_field_stream (uiout
, "exp", stb
);
4788 do_cleanups (ui_out_chain
);
4790 case bp_access_watchpoint
:
4791 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4792 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4793 ui_out_field_int (uiout
, "number", b
->number
);
4794 ui_out_text (uiout
, ": ");
4795 print_expression (b
->exp
, stb
->stream
);
4796 ui_out_field_stream (uiout
, "exp", stb
);
4797 do_cleanups (ui_out_chain
);
4800 if (ui_out_is_mi_like_p (uiout
))
4805 printf_filtered ("Breakpoint %d", b
->number
);
4808 case bp_hardware_breakpoint
:
4809 if (ui_out_is_mi_like_p (uiout
))
4814 printf_filtered ("Hardware assisted breakpoint %d", b
->number
);
4818 case bp_catch_unload
:
4819 printf_filtered ("Catchpoint %d (%s %s)",
4821 (b
->type
== bp_catch_load
) ? "load" : "unload",
4822 (b
->dll_pathname
!= NULL
) ?
4823 b
->dll_pathname
: "<any library>");
4826 case bp_catch_vfork
:
4827 printf_filtered ("Catchpoint %d (%s)",
4829 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4832 printf_filtered ("Catchpoint %d (exec)",
4835 case bp_catch_catch
:
4836 case bp_catch_throw
:
4837 printf_filtered ("Catchpoint %d (%s)",
4839 (b
->type
== bp_catch_catch
) ? "catch" : "throw");
4845 case bp_longjmp_resume
:
4846 case bp_step_resume
:
4847 case bp_through_sigtramp
:
4849 case bp_watchpoint_scope
:
4850 case bp_shlib_event
:
4851 case bp_thread_event
:
4852 case bp_overlay_event
:
4860 printf_filtered (" (%s) pending.", b
->addr_string
);
4864 if (addressprint
|| b
->source_file
== NULL
)
4866 printf_filtered (" at ");
4867 print_address_numeric (b
->loc
->address
, 1, gdb_stdout
);
4870 printf_filtered (": file %s, line %d.",
4871 b
->source_file
, b
->line_number
);
4874 do_cleanups (old_chain
);
4875 if (ui_out_is_mi_like_p (uiout
))
4877 printf_filtered ("\n");
4881 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4882 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4883 COND[i] and COND_STRING[i] values.
4885 The parameter PENDING_BP points to a pending breakpoint that is
4886 the basis of the breakpoints currently being created. The pending
4887 breakpoint may contain a separate condition string or commands
4888 that were added after the initial pending breakpoint was created.
4890 NOTE: If the function succeeds, the caller is expected to cleanup
4891 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4892 array contents). If the function fails (error() is called), the
4893 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4894 COND and SALS arrays and each of those arrays contents. */
4897 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
4898 struct expression
**cond
, char **cond_string
,
4899 enum bptype type
, enum bpdisp disposition
,
4900 int thread
, int ignore_count
, int from_tty
,
4901 struct breakpoint
*pending_bp
)
4903 if (type
== bp_hardware_breakpoint
)
4905 int i
= hw_breakpoint_used_count ();
4906 int target_resources_ok
=
4907 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
4909 if (target_resources_ok
== 0)
4910 error ("No hardware breakpoint support in the target.");
4911 else if (target_resources_ok
< 0)
4912 error ("Hardware breakpoints used exceeds limit.");
4915 /* Now set all the breakpoints. */
4918 for (i
= 0; i
< sals
.nelts
; i
++)
4920 struct breakpoint
*b
;
4921 struct symtab_and_line sal
= sals
.sals
[i
];
4924 describe_other_breakpoints (sal
.pc
, sal
.section
);
4926 b
= set_raw_breakpoint (sal
, type
);
4927 set_breakpoint_count (breakpoint_count
+ 1);
4928 b
->number
= breakpoint_count
;
4932 b
->addr_string
= addr_string
[i
];
4934 /* addr_string has to be used or breakpoint_re_set will delete
4936 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4937 b
->cond_string
= cond_string
[i
];
4938 b
->ignore_count
= ignore_count
;
4939 b
->enable_state
= bp_enabled
;
4940 b
->disposition
= disposition
;
4941 /* If resolving a pending breakpoint, a check must be made to see if
4942 the user has specified a new condition or commands for the
4943 breakpoint. A new condition will override any condition that was
4944 initially specified with the initial breakpoint command. */
4948 if (pending_bp
->cond_string
)
4950 arg
= pending_bp
->cond_string
;
4951 b
->cond_string
= savestring (arg
, strlen (arg
));
4952 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->loc
->address
), 0);
4954 error ("Junk at end of pending breakpoint condition expression");
4956 /* If there are commands associated with the breakpoint, they should
4958 if (pending_bp
->commands
)
4959 b
->commands
= copy_command_lines (pending_bp
->commands
);
4961 /* We have to copy over the ignore_count and thread as well. */
4962 b
->ignore_count
= pending_bp
->ignore_count
;
4963 b
->thread
= pending_bp
->thread
;
4970 /* Parse ARG which is assumed to be a SAL specification possibly
4971 followed by conditionals. On return, SALS contains an array of SAL
4972 addresses found. ADDR_STRING contains a vector of (canonical)
4973 address strings. ARG points to the end of the SAL. */
4976 parse_breakpoint_sals (char **address
,
4977 struct symtabs_and_lines
*sals
,
4978 char ***addr_string
,
4981 char *addr_start
= *address
;
4982 *addr_string
= NULL
;
4983 /* If no arg given, or if first arg is 'if ', use the default
4985 if ((*address
) == NULL
4986 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
4988 if (default_breakpoint_valid
)
4990 struct symtab_and_line sal
;
4991 init_sal (&sal
); /* initialize to zeroes */
4992 sals
->sals
= (struct symtab_and_line
*)
4993 xmalloc (sizeof (struct symtab_and_line
));
4994 sal
.pc
= default_breakpoint_address
;
4995 sal
.line
= default_breakpoint_line
;
4996 sal
.symtab
= default_breakpoint_symtab
;
4997 sal
.section
= find_pc_overlay (sal
.pc
);
4998 sals
->sals
[0] = sal
;
5002 error ("No default breakpoint address now.");
5006 /* Force almost all breakpoints to be in terms of the
5007 current_source_symtab (which is decode_line_1's default). This
5008 should produce the results we want almost all of the time while
5009 leaving default_breakpoint_* alone.
5010 ObjC: However, don't match an Objective-C method name which
5011 may have a '+' or '-' succeeded by a '[' */
5013 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
5015 if (default_breakpoint_valid
5017 || ((strchr ("+-", (*address
)[0]) != NULL
)
5018 && ((*address
)[1] != '['))))
5019 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
5020 default_breakpoint_line
, addr_string
,
5023 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0,
5024 addr_string
, not_found_ptr
);
5026 /* For any SAL that didn't have a canonical string, fill one in. */
5027 if (sals
->nelts
> 0 && *addr_string
== NULL
)
5028 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
5029 if (addr_start
!= (*address
))
5032 for (i
= 0; i
< sals
->nelts
; i
++)
5034 /* Add the string if not present. */
5035 if ((*addr_string
)[i
] == NULL
)
5036 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
5042 /* Convert each SAL into a real PC. Verify that the PC can be
5043 inserted as a breakpoint. If it can't throw an error. */
5046 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
5050 for (i
= 0; i
< sals
->nelts
; i
++)
5052 resolve_sal_pc (&sals
->sals
[i
]);
5054 /* It's possible for the PC to be nonzero, but still an illegal
5055 value on some targets.
5057 For example, on HP-UX if you start gdb, and before running the
5058 inferior you try to set a breakpoint on a shared library function
5059 "foo" where the inferior doesn't call "foo" directly but does
5060 pass its address to another function call, then we do find a
5061 minimal symbol for the "foo", but it's address is invalid.
5062 (Appears to be an index into a table that the loader sets up
5063 when the inferior is run.)
5065 Give the target a chance to bless sals.sals[i].pc before we
5066 try to make a breakpoint for it. */
5067 #ifdef DEPRECATED_PC_REQUIRES_RUN_BEFORE_USE
5068 if (DEPRECATED_PC_REQUIRES_RUN_BEFORE_USE (sals
->sals
[i
].pc
))
5070 if (address
== NULL
)
5071 error ("Cannot break without a running program.");
5073 error ("Cannot break on %s without a running program.",
5081 do_captured_parse_breakpoint (struct ui_out
*ui
, void *data
)
5083 struct captured_parse_breakpoint_args
*args
= data
;
5085 parse_breakpoint_sals (args
->arg_p
, args
->sals_p
, args
->addr_string_p
,
5086 args
->not_found_ptr
);
5091 /* Set a breakpoint according to ARG (function, linenum or *address)
5092 flag: first bit : 0 non-temporary, 1 temporary.
5093 second bit : 0 normal breakpoint, 1 hardware breakpoint.
5095 PENDING_BP is non-NULL when this function is being called to resolve
5096 a pending breakpoint. */
5099 break_command_1 (char *arg
, int flag
, int from_tty
, struct breakpoint
*pending_bp
)
5101 int tempflag
, hardwareflag
;
5102 struct symtabs_and_lines sals
;
5103 struct expression
**cond
= 0;
5104 struct symtab_and_line pending_sal
;
5105 char **cond_string
= (char **) NULL
;
5108 char *addr_start
= arg
;
5110 struct cleanup
*old_chain
;
5111 struct cleanup
*breakpoint_chain
= NULL
;
5112 struct captured_parse_breakpoint_args parse_args
;
5116 int ignore_count
= 0;
5119 hardwareflag
= flag
& BP_HARDWAREFLAG
;
5120 tempflag
= flag
& BP_TEMPFLAG
;
5126 parse_args
.arg_p
= &arg
;
5127 parse_args
.sals_p
= &sals
;
5128 parse_args
.addr_string_p
= &addr_string
;
5129 parse_args
.not_found_ptr
= ¬_found
;
5131 rc
= catch_exceptions_with_msg (uiout
, do_captured_parse_breakpoint
,
5132 &parse_args
, NULL
, &err_msg
,
5135 /* If caller is interested in rc value from parse, set value. */
5137 if (rc
!= GDB_RC_OK
)
5139 /* Check for file or function not found. */
5142 /* If called to resolve pending breakpoint, just return error code. */
5149 error_output_message (NULL
, err_msg
);
5152 /* If pending breakpoint support is turned off, throw error. */
5154 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
5155 throw_exception (RETURN_ERROR
);
5157 /* If pending breakpoint support is auto query and the user selects
5158 no, then simply return the error code. */
5159 if (pending_break_support
== AUTO_BOOLEAN_AUTO
&&
5160 !nquery ("Make breakpoint pending on future shared library load? "))
5163 /* At this point, either the user was queried about setting a
5164 pending breakpoint and selected yes, or pending breakpoint
5165 behavior is on and thus a pending breakpoint is defaulted
5166 on behalf of the user. */
5167 copy_arg
= xstrdup (addr_start
);
5168 addr_string
= ©_arg
;
5170 sals
.sals
= &pending_sal
;
5180 else if (!sals
.nelts
)
5183 /* Create a chain of things that always need to be cleaned up. */
5184 old_chain
= make_cleanup (null_cleanup
, 0);
5188 /* Make sure that all storage allocated to SALS gets freed. */
5189 make_cleanup (xfree
, sals
.sals
);
5191 /* Cleanup the addr_string array but not its contents. */
5192 make_cleanup (xfree
, addr_string
);
5195 /* Allocate space for all the cond expressions. */
5196 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5197 make_cleanup (xfree
, cond
);
5199 /* Allocate space for all the cond strings. */
5200 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5201 make_cleanup (xfree
, cond_string
);
5203 /* ----------------------------- SNIP -----------------------------
5204 Anything added to the cleanup chain beyond this point is assumed
5205 to be part of a breakpoint. If the breakpoint create succeeds
5206 then the memory is not reclaimed. */
5207 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5209 /* Mark the contents of the addr_string for cleanup. These go on
5210 the breakpoint_chain and only occure if the breakpoint create
5212 for (i
= 0; i
< sals
.nelts
; i
++)
5214 if (addr_string
[i
] != NULL
)
5215 make_cleanup (xfree
, addr_string
[i
]);
5218 /* Resolve all line numbers to PC's and verify that the addresses
5219 are ok for the target. */
5221 breakpoint_sals_to_pc (&sals
, addr_start
);
5223 /* Verify that condition can be parsed, before setting any
5224 breakpoints. Allocate a separate condition expression for each
5226 thread
= -1; /* No specific thread yet */
5229 for (i
= 0; i
< sals
.nelts
; i
++)
5236 char *cond_start
= NULL
;
5237 char *cond_end
= NULL
;
5238 while (*tok
== ' ' || *tok
== '\t')
5243 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5246 toklen
= end_tok
- tok
;
5248 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5250 tok
= cond_start
= end_tok
+ 1;
5251 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
),
5253 make_cleanup (xfree
, cond
[i
]);
5255 cond_string
[i
] = savestring (cond_start
,
5256 cond_end
- cond_start
);
5257 make_cleanup (xfree
, cond_string
[i
]);
5259 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5265 thread
= strtol (tok
, &tok
, 0);
5267 error ("Junk after thread keyword.");
5268 if (!valid_thread_id (thread
))
5269 error ("Unknown thread %d\n", thread
);
5272 error ("Junk at end of arguments.");
5275 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5276 hardwareflag
? bp_hardware_breakpoint
5278 tempflag
? disp_del
: disp_donttouch
,
5279 thread
, ignore_count
, from_tty
,
5284 struct symtab_and_line sal
;
5285 struct breakpoint
*b
;
5290 make_cleanup (xfree
, copy_arg
);
5292 b
= set_raw_breakpoint (sal
, hardwareflag
? bp_hardware_breakpoint
5294 set_breakpoint_count (breakpoint_count
+ 1);
5295 b
->number
= breakpoint_count
;
5298 b
->addr_string
= *addr_string
;
5299 b
->cond_string
= *cond_string
;
5300 b
->ignore_count
= ignore_count
;
5302 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5303 b
->from_tty
= from_tty
;
5310 warning ("Multiple breakpoints were set.");
5311 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5313 /* That's it. Discard the cleanups for data inserted into the
5315 discard_cleanups (breakpoint_chain
);
5316 /* But cleanup everything else. */
5317 do_cleanups (old_chain
);
5322 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
5323 linenum or *address) with COND and IGNORE_COUNT. */
5325 struct captured_breakpoint_args
5336 do_captured_breakpoint (void *data
)
5338 struct captured_breakpoint_args
*args
= data
;
5339 struct symtabs_and_lines sals
;
5340 struct expression
**cond
;
5341 struct cleanup
*old_chain
;
5342 struct cleanup
*breakpoint_chain
= NULL
;
5349 /* Parse the source and lines spec. Delay check that the expression
5350 didn't contain trailing garbage until after cleanups are in
5354 address_end
= args
->address
;
5356 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
, 0);
5361 /* Create a chain of things at always need to be cleaned up. */
5362 old_chain
= make_cleanup (null_cleanup
, 0);
5364 /* Always have a addr_string array, even if it is empty. */
5365 make_cleanup (xfree
, addr_string
);
5367 /* Make sure that all storage allocated to SALS gets freed. */
5368 make_cleanup (xfree
, sals
.sals
);
5370 /* Allocate space for all the cond expressions. */
5371 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5372 make_cleanup (xfree
, cond
);
5374 /* Allocate space for all the cond strings. */
5375 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5376 make_cleanup (xfree
, cond_string
);
5378 /* ----------------------------- SNIP -----------------------------
5379 Anything added to the cleanup chain beyond this point is assumed
5380 to be part of a breakpoint. If the breakpoint create goes
5381 through then that memory is not cleaned up. */
5382 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5384 /* Mark the contents of the addr_string for cleanup. These go on
5385 the breakpoint_chain and only occure if the breakpoint create
5387 for (i
= 0; i
< sals
.nelts
; i
++)
5389 if (addr_string
[i
] != NULL
)
5390 make_cleanup (xfree
, addr_string
[i
]);
5393 /* Wait until now before checking for garbage at the end of the
5394 address. That way cleanups can take care of freeing any
5396 if (*address_end
!= '\0')
5397 error ("Garbage %s following breakpoint address", address_end
);
5399 /* Resolve all line numbers to PC's. */
5400 breakpoint_sals_to_pc (&sals
, args
->address
);
5402 /* Verify that conditions can be parsed, before setting any
5404 for (i
= 0; i
< sals
.nelts
; i
++)
5406 if (args
->condition
!= NULL
)
5408 char *tok
= args
->condition
;
5409 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
5411 error ("Garbage %s follows condition", tok
);
5412 make_cleanup (xfree
, cond
[i
]);
5413 cond_string
[i
] = xstrdup (args
->condition
);
5417 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5418 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
5419 args
->tempflag
? disp_del
: disp_donttouch
,
5420 args
->thread
, args
->ignore_count
, 0/*from-tty*/,
5421 NULL
/*pending_bp*/);
5423 /* That's it. Discard the cleanups for data inserted into the
5425 discard_cleanups (breakpoint_chain
);
5426 /* But cleanup everything else. */
5427 do_cleanups (old_chain
);
5432 gdb_breakpoint (char *address
, char *condition
,
5433 int hardwareflag
, int tempflag
,
5434 int thread
, int ignore_count
)
5436 struct captured_breakpoint_args args
;
5437 args
.address
= address
;
5438 args
.condition
= condition
;
5439 args
.hardwareflag
= hardwareflag
;
5440 args
.tempflag
= tempflag
;
5441 args
.thread
= thread
;
5442 args
.ignore_count
= ignore_count
;
5443 return catch_errors (do_captured_breakpoint
, &args
,
5444 NULL
, RETURN_MASK_ALL
);
5448 /* Helper function for break_command_1 and disassemble_command. */
5451 resolve_sal_pc (struct symtab_and_line
*sal
)
5455 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5457 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5458 error ("No line %d in file \"%s\".",
5459 sal
->line
, sal
->symtab
->filename
);
5463 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5465 struct blockvector
*bv
;
5470 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &index
, sal
->symtab
);
5473 b
= BLOCKVECTOR_BLOCK (bv
, index
);
5474 sym
= block_function (b
);
5477 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5478 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5482 /* It really is worthwhile to have the section, so we'll just
5483 have to look harder. This case can be executed if we have
5484 line numbers but no functions (as can happen in assembly
5487 struct minimal_symbol
*msym
;
5489 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5491 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5498 break_command (char *arg
, int from_tty
)
5500 break_command_1 (arg
, 0, from_tty
, NULL
);
5504 tbreak_command (char *arg
, int from_tty
)
5506 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
, NULL
);
5510 hbreak_command (char *arg
, int from_tty
)
5512 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
, NULL
);
5516 thbreak_command (char *arg
, int from_tty
)
5518 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
, NULL
);
5522 stop_command (char *arg
, int from_tty
)
5524 printf_filtered ("Specify the type of breakpoint to set.\n\
5525 Usage: stop in <function | address>\n\
5530 stopin_command (char *arg
, int from_tty
)
5534 if (arg
== (char *) NULL
)
5536 else if (*arg
!= '*')
5541 /* look for a ':'. If this is a line number specification, then
5542 say it is bad, otherwise, it should be an address or
5543 function/method name */
5544 while (*argptr
&& !hasColon
)
5546 hasColon
= (*argptr
== ':');
5551 badInput
= (*argptr
!= ':'); /* Not a class::method */
5553 badInput
= isdigit (*arg
); /* a simple line number */
5557 printf_filtered ("Usage: stop in <function | address>\n");
5559 break_command_1 (arg
, 0, from_tty
, NULL
);
5563 stopat_command (char *arg
, int from_tty
)
5567 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5574 /* look for a ':'. If there is a '::' then get out, otherwise
5575 it is probably a line number. */
5576 while (*argptr
&& !hasColon
)
5578 hasColon
= (*argptr
== ':');
5583 badInput
= (*argptr
== ':'); /* we have class::method */
5585 badInput
= !isdigit (*arg
); /* not a line number */
5589 printf_filtered ("Usage: stop at <line>\n");
5591 break_command_1 (arg
, 0, from_tty
, NULL
);
5594 /* accessflag: hw_write: watch write,
5595 hw_read: watch read,
5596 hw_access: watch access (read or write) */
5598 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5600 struct breakpoint
*b
;
5601 struct symtab_and_line sal
;
5602 struct expression
*exp
;
5603 struct block
*exp_valid_block
;
5604 struct value
*val
, *mark
;
5605 struct frame_info
*frame
;
5606 struct frame_info
*prev_frame
= NULL
;
5607 char *exp_start
= NULL
;
5608 char *exp_end
= NULL
;
5609 char *tok
, *end_tok
;
5611 char *cond_start
= NULL
;
5612 char *cond_end
= NULL
;
5613 struct expression
*cond
= NULL
;
5614 int i
, other_type_used
, target_resources_ok
= 0;
5615 enum bptype bp_type
;
5618 init_sal (&sal
); /* initialize to zeroes */
5620 /* Parse arguments. */
5621 innermost_block
= NULL
;
5623 exp
= parse_exp_1 (&arg
, 0, 0);
5625 exp_valid_block
= innermost_block
;
5626 mark
= value_mark ();
5627 val
= evaluate_expression (exp
);
5628 release_value (val
);
5629 if (VALUE_LAZY (val
))
5630 value_fetch_lazy (val
);
5633 while (*tok
== ' ' || *tok
== '\t')
5637 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5640 toklen
= end_tok
- tok
;
5641 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5643 tok
= cond_start
= end_tok
+ 1;
5644 cond
= parse_exp_1 (&tok
, 0, 0);
5648 error ("Junk at end of command.");
5650 if (accessflag
== hw_read
)
5651 bp_type
= bp_read_watchpoint
;
5652 else if (accessflag
== hw_access
)
5653 bp_type
= bp_access_watchpoint
;
5655 bp_type
= bp_hardware_watchpoint
;
5657 mem_cnt
= can_use_hardware_watchpoint (val
);
5658 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5659 error ("Expression cannot be implemented with read/access watchpoint.");
5662 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5663 target_resources_ok
=
5664 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5666 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5667 error ("Target does not support this type of hardware watchpoint.");
5669 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5670 error ("Target can only support one kind of HW watchpoint at a time.");
5673 #if defined(HPUXHPPA)
5674 /* On HP-UX if you set a h/w
5675 watchpoint before the "run" command, the inferior dies with a e.g.,
5676 SIGILL once you start it. I initially believed this was due to a
5677 bad interaction between page protection traps and the initial
5678 startup sequence by the dynamic linker.
5680 However, I tried avoiding that by having HP-UX's implementation of
5681 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5682 yet, which forced slow watches before a "run" or "attach", and it
5683 still fails somewhere in the startup code.
5685 Until I figure out what's happening, I'm disallowing watches altogether
5686 before the "run" or "attach" command. We'll tell the user they must
5687 set watches after getting the program started. */
5688 if (!target_has_execution
)
5690 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5693 #endif /* HPUXHPPA */
5695 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5696 watchpoint could not be set. */
5697 if (!mem_cnt
|| target_resources_ok
<= 0)
5698 bp_type
= bp_watchpoint
;
5700 /* Now set up the breakpoint. */
5701 b
= set_raw_breakpoint (sal
, bp_type
);
5702 set_breakpoint_count (breakpoint_count
+ 1);
5703 b
->number
= breakpoint_count
;
5704 b
->disposition
= disp_donttouch
;
5706 b
->exp_valid_block
= exp_valid_block
;
5707 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5711 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5715 frame
= block_innermost_frame (exp_valid_block
);
5718 prev_frame
= get_prev_frame (frame
);
5719 b
->watchpoint_frame
= get_frame_id (frame
);
5723 memset (&b
->watchpoint_frame
, 0, sizeof (b
->watchpoint_frame
));
5726 /* If the expression is "local", then set up a "watchpoint scope"
5727 breakpoint at the point where we've left the scope of the watchpoint
5729 if (innermost_block
)
5733 struct breakpoint
*scope_breakpoint
;
5734 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5735 bp_watchpoint_scope
);
5737 scope_breakpoint
->enable_state
= bp_enabled
;
5739 /* Automatically delete the breakpoint when it hits. */
5740 scope_breakpoint
->disposition
= disp_del
;
5742 /* Only break in the proper frame (help with recursion). */
5743 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5745 /* Set the address at which we will stop. */
5746 scope_breakpoint
->loc
->requested_address
5747 = get_frame_pc (prev_frame
);
5748 scope_breakpoint
->loc
->address
5749 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
,
5750 scope_breakpoint
->type
);
5752 /* The scope breakpoint is related to the watchpoint. We
5753 will need to act on them together. */
5754 b
->related_breakpoint
= scope_breakpoint
;
5757 value_free_to_mark (mark
);
5761 /* Return count of locations need to be watched and can be handled
5762 in hardware. If the watchpoint can not be handled
5763 in hardware return zero. */
5765 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5766 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5767 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5771 can_use_hardware_watchpoint (struct value
*v
)
5773 int found_memory_cnt
= 0;
5774 struct value
*head
= v
;
5776 /* Did the user specifically forbid us to use hardware watchpoints? */
5777 if (!can_use_hw_watchpoints
)
5780 /* Make sure that the value of the expression depends only upon
5781 memory contents, and values computed from them within GDB. If we
5782 find any register references or function calls, we can't use a
5783 hardware watchpoint.
5785 The idea here is that evaluating an expression generates a series
5786 of values, one holding the value of every subexpression. (The
5787 expression a*b+c has five subexpressions: a, b, a*b, c, and
5788 a*b+c.) GDB's values hold almost enough information to establish
5789 the criteria given above --- they identify memory lvalues,
5790 register lvalues, computed values, etcetera. So we can evaluate
5791 the expression, and then scan the chain of values that leaves
5792 behind to decide whether we can detect any possible change to the
5793 expression's final value using only hardware watchpoints.
5795 However, I don't think that the values returned by inferior
5796 function calls are special in any way. So this function may not
5797 notice that an expression involving an inferior function call
5798 can't be watched with hardware watchpoints. FIXME. */
5799 for (; v
; v
= v
->next
)
5801 if (VALUE_LVAL (v
) == lval_memory
)
5804 /* A lazy memory lvalue is one that GDB never needed to fetch;
5805 we either just used its address (e.g., `a' in `a.b') or
5806 we never needed it at all (e.g., `a' in `a,b'). */
5810 /* Ahh, memory we actually used! Check if we can cover
5811 it with hardware watchpoints. */
5812 struct type
*vtype
= check_typedef (value_type (v
));
5814 /* We only watch structs and arrays if user asked for it
5815 explicitly, never if they just happen to appear in a
5816 middle of some value chain. */
5818 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
5819 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
5821 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
5822 int len
= TYPE_LENGTH (value_type (v
));
5824 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
5831 else if (v
->lval
!= not_lval
&& v
->modifiable
== 0)
5832 return 0; /* ??? What does this represent? */
5833 else if (v
->lval
== lval_register
)
5834 return 0; /* cannot watch a register with a HW watchpoint */
5837 /* The expression itself looks suitable for using a hardware
5838 watchpoint, but give the target machine a chance to reject it. */
5839 return found_memory_cnt
;
5843 watch_command_wrapper (char *arg
, int from_tty
)
5845 watch_command (arg
, from_tty
);
5849 watch_command (char *arg
, int from_tty
)
5851 watch_command_1 (arg
, hw_write
, from_tty
);
5855 rwatch_command_wrapper (char *arg
, int from_tty
)
5857 rwatch_command (arg
, from_tty
);
5861 rwatch_command (char *arg
, int from_tty
)
5863 watch_command_1 (arg
, hw_read
, from_tty
);
5867 awatch_command_wrapper (char *arg
, int from_tty
)
5869 awatch_command (arg
, from_tty
);
5873 awatch_command (char *arg
, int from_tty
)
5875 watch_command_1 (arg
, hw_access
, from_tty
);
5879 /* Helper routines for the until_command routine in infcmd.c. Here
5880 because it uses the mechanisms of breakpoints. */
5882 /* This function is called by fetch_inferior_event via the
5883 cmd_continuation pointer, to complete the until command. It takes
5884 care of cleaning up the temporary breakpoints set up by the until
5887 until_break_command_continuation (struct continuation_arg
*arg
)
5889 struct cleanup
*cleanups
;
5891 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
5892 do_exec_cleanups (cleanups
);
5896 until_break_command (char *arg
, int from_tty
, int anywhere
)
5898 struct symtabs_and_lines sals
;
5899 struct symtab_and_line sal
;
5900 struct frame_info
*prev_frame
= get_prev_frame (deprecated_selected_frame
);
5901 struct breakpoint
*breakpoint
;
5902 struct cleanup
*old_chain
;
5903 struct continuation_arg
*arg1
;
5906 clear_proceed_status ();
5908 /* Set a breakpoint where the user wants it and at return from
5911 if (default_breakpoint_valid
)
5912 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
5913 default_breakpoint_line
, (char ***) NULL
, NULL
);
5915 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
5916 0, (char ***) NULL
, NULL
);
5918 if (sals
.nelts
!= 1)
5919 error ("Couldn't get information on specified line.");
5922 xfree (sals
.sals
); /* malloc'd, so freed */
5925 error ("Junk at end of arguments.");
5927 resolve_sal_pc (&sal
);
5930 /* If the user told us to continue until a specified location,
5931 we don't specify a frame at which we need to stop. */
5932 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
5934 /* Otherwise, specify the current frame, because we want to stop only
5935 at the very same frame. */
5936 breakpoint
= set_momentary_breakpoint (sal
,
5937 get_frame_id (deprecated_selected_frame
),
5940 if (!target_can_async_p ())
5941 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
5943 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
5945 /* If we are running asynchronously, and the target supports async
5946 execution, we are not waiting for the target to stop, in the call
5947 tp proceed, below. This means that we cannot delete the
5948 brekpoints until the target has actually stopped. The only place
5949 where we get a chance to do that is in fetch_inferior_event, so
5950 we must set things up for that. */
5952 if (target_can_async_p ())
5954 /* In this case the arg for the continuation is just the point
5955 in the exec_cleanups chain from where to start doing
5956 cleanups, because all the continuation does is the cleanups in
5957 the exec_cleanup_chain. */
5959 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
5961 arg1
->data
.pointer
= old_chain
;
5963 add_continuation (until_break_command_continuation
, arg1
);
5966 /* Keep within the current frame, or in frames called by the current
5970 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
5971 sal
.pc
= get_frame_pc (prev_frame
);
5972 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
5974 if (!target_can_async_p ())
5975 make_cleanup_delete_breakpoint (breakpoint
);
5977 make_exec_cleanup_delete_breakpoint (breakpoint
);
5980 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
5981 /* Do the cleanups now, anly if we are not running asynchronously,
5982 of if we are, but the target is still synchronous. */
5983 if (!target_can_async_p ())
5984 do_cleanups (old_chain
);
5988 ep_skip_leading_whitespace (char **s
)
5990 if ((s
== NULL
) || (*s
== NULL
))
5992 while (isspace (**s
))
5996 /* This function examines a string, and attempts to find a token
5997 that might be an event name in the leading characters. If a
5998 possible match is found, a pointer to the last character of
5999 the token is returned. Else, NULL is returned. */
6002 ep_find_event_name_end (char *arg
)
6005 char *event_name_end
= NULL
;
6007 /* If we could depend upon the presense of strrpbrk, we'd use that... */
6011 /* We break out of the loop when we find a token delimiter.
6012 Basically, we're looking for alphanumerics and underscores;
6013 anything else delimites the token. */
6016 if (!isalnum (*s
) && (*s
!= '_'))
6022 return event_name_end
;
6026 /* This function attempts to parse an optional "if <cond>" clause
6027 from the arg string. If one is not found, it returns NULL.
6029 Else, it returns a pointer to the condition string. (It does not
6030 attempt to evaluate the string against a particular block.) And,
6031 it updates arg to point to the first character following the parsed
6032 if clause in the arg string. */
6035 ep_parse_optional_if_clause (char **arg
)
6039 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
6042 /* Skip the "if" keyword. */
6045 /* Skip any extra leading whitespace, and record the start of the
6046 condition string. */
6047 ep_skip_leading_whitespace (arg
);
6050 /* Assume that the condition occupies the remainder of the arg string. */
6051 (*arg
) += strlen (cond_string
);
6056 /* This function attempts to parse an optional filename from the arg
6057 string. If one is not found, it returns NULL.
6059 Else, it returns a pointer to the parsed filename. (This function
6060 makes no attempt to verify that a file of that name exists, or is
6061 accessible.) And, it updates arg to point to the first character
6062 following the parsed filename in the arg string.
6064 Note that clients needing to preserve the returned filename for
6065 future access should copy it to their own buffers. */
6067 ep_parse_optional_filename (char **arg
)
6069 static char filename
[1024];
6074 if ((*arg_p
== '\0') || isspace (*arg_p
))
6092 /* Commands to deal with catching events, such as signals, exceptions,
6093 process start/exit, etc. */
6097 catch_fork
, catch_vfork
6102 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
6105 char *cond_string
= NULL
;
6107 ep_skip_leading_whitespace (&arg
);
6109 /* The allowed syntax is:
6111 catch [v]fork if <cond>
6113 First, check if there's an if clause. */
6114 cond_string
= ep_parse_optional_if_clause (&arg
);
6116 if ((*arg
!= '\0') && !isspace (*arg
))
6117 error ("Junk at end of arguments.");
6119 /* If this target supports it, create a fork or vfork catchpoint
6120 and enable reporting of such events. */
6124 create_fork_event_catchpoint (tempflag
, cond_string
);
6127 create_vfork_event_catchpoint (tempflag
, cond_string
);
6130 error ("unsupported or unknown fork kind; cannot catch it");
6136 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6138 char *cond_string
= NULL
;
6140 ep_skip_leading_whitespace (&arg
);
6142 /* The allowed syntax is:
6144 catch exec if <cond>
6146 First, check if there's an if clause. */
6147 cond_string
= ep_parse_optional_if_clause (&arg
);
6149 if ((*arg
!= '\0') && !isspace (*arg
))
6150 error ("Junk at end of arguments.");
6152 /* If this target supports it, create an exec catchpoint
6153 and enable reporting of such events. */
6154 create_exec_event_catchpoint (tempflag
, cond_string
);
6158 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6160 char *dll_pathname
= NULL
;
6161 char *cond_string
= NULL
;
6163 ep_skip_leading_whitespace (&arg
);
6165 /* The allowed syntax is:
6167 catch load if <cond>
6168 catch load <filename>
6169 catch load <filename> if <cond>
6171 The user is not allowed to specify the <filename> after an
6174 We'll ignore the pathological case of a file named "if".
6176 First, check if there's an if clause. If so, then there
6177 cannot be a filename. */
6178 cond_string
= ep_parse_optional_if_clause (&arg
);
6180 /* If there was an if clause, then there cannot be a filename.
6181 Else, there might be a filename and an if clause. */
6182 if (cond_string
== NULL
)
6184 dll_pathname
= ep_parse_optional_filename (&arg
);
6185 ep_skip_leading_whitespace (&arg
);
6186 cond_string
= ep_parse_optional_if_clause (&arg
);
6189 if ((*arg
!= '\0') && !isspace (*arg
))
6190 error ("Junk at end of arguments.");
6192 /* Create a load breakpoint that only triggers when a load of
6193 the specified dll (or any dll, if no pathname was specified)
6195 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6196 dll_pathname
, cond_string
);
6200 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6202 char *dll_pathname
= NULL
;
6203 char *cond_string
= NULL
;
6205 ep_skip_leading_whitespace (&arg
);
6207 /* The allowed syntax is:
6209 catch unload if <cond>
6210 catch unload <filename>
6211 catch unload <filename> if <cond>
6213 The user is not allowed to specify the <filename> after an
6216 We'll ignore the pathological case of a file named "if".
6218 First, check if there's an if clause. If so, then there
6219 cannot be a filename. */
6220 cond_string
= ep_parse_optional_if_clause (&arg
);
6222 /* If there was an if clause, then there cannot be a filename.
6223 Else, there might be a filename and an if clause. */
6224 if (cond_string
== NULL
)
6226 dll_pathname
= ep_parse_optional_filename (&arg
);
6227 ep_skip_leading_whitespace (&arg
);
6228 cond_string
= ep_parse_optional_if_clause (&arg
);
6231 if ((*arg
!= '\0') && !isspace (*arg
))
6232 error ("Junk at end of arguments.");
6234 /* Create an unload breakpoint that only triggers when an unload of
6235 the specified dll (or any dll, if no pathname was specified)
6237 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6238 dll_pathname
, cond_string
);
6241 /* Commands to deal with catching exceptions. */
6243 /* Set a breakpoint at the specified callback routine for an
6244 exception event callback */
6247 create_exception_catchpoint (int tempflag
, char *cond_string
,
6248 enum exception_event_kind ex_event
,
6249 struct symtab_and_line
*sal
)
6251 struct breakpoint
*b
;
6252 int thread
= -1; /* All threads. */
6255 if (!sal
) /* no exception support? */
6260 case EX_EVENT_THROW
:
6261 bptype
= bp_catch_throw
;
6263 case EX_EVENT_CATCH
:
6264 bptype
= bp_catch_catch
;
6266 default: /* error condition */
6267 error ("Internal error -- invalid catchpoint kind");
6270 b
= set_raw_breakpoint (*sal
, bptype
);
6271 set_breakpoint_count (breakpoint_count
+ 1);
6272 b
->number
= breakpoint_count
;
6274 b
->cond_string
= (cond_string
== NULL
) ?
6275 NULL
: savestring (cond_string
, strlen (cond_string
));
6277 b
->addr_string
= NULL
;
6278 b
->enable_state
= bp_enabled
;
6279 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6283 static enum print_stop_action
6284 print_exception_catchpoint (struct breakpoint
*b
)
6286 annotate_catchpoint (b
->number
);
6288 if (strstr (b
->addr_string
, "throw") != NULL
)
6289 printf_filtered ("\nCatchpoint %d (exception thrown)\n",
6292 printf_filtered ("\nCatchpoint %d (exception caught)\n",
6295 return PRINT_SRC_AND_LOC
;
6299 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6304 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6307 *last_addr
= b
->loc
->address
;
6308 if (strstr (b
->addr_string
, "throw") != NULL
)
6309 ui_out_field_string (uiout
, "what", "exception throw");
6311 ui_out_field_string (uiout
, "what", "exception catch");
6315 print_mention_exception_catchpoint (struct breakpoint
*b
)
6317 if (strstr (b
->addr_string
, "throw") != NULL
)
6318 printf_filtered ("Catchpoint %d (throw)", b
->number
);
6320 printf_filtered ("Catchpoint %d (catch)", b
->number
);
6323 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6324 print_exception_catchpoint
,
6325 print_one_exception_catchpoint
,
6326 print_mention_exception_catchpoint
6330 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6331 enum exception_event_kind ex_event
, int from_tty
)
6333 char *trigger_func_name
, *nameptr
;
6334 struct symtabs_and_lines sals
;
6335 struct breakpoint
*b
;
6337 if (ex_event
== EX_EVENT_CATCH
)
6338 trigger_func_name
= xstrdup ("__cxa_begin_catch");
6340 trigger_func_name
= xstrdup ("__cxa_throw");
6342 nameptr
= trigger_func_name
;
6343 sals
= decode_line_1 (&nameptr
, 1, NULL
, 0, NULL
, NULL
);
6344 if (sals
.nelts
== 0)
6346 xfree (trigger_func_name
);
6350 b
= set_raw_breakpoint (sals
.sals
[0], bp_breakpoint
);
6351 set_breakpoint_count (breakpoint_count
+ 1);
6352 b
->number
= breakpoint_count
;
6354 b
->cond_string
= (cond_string
== NULL
) ?
6355 NULL
: savestring (cond_string
, strlen (cond_string
));
6357 b
->addr_string
= trigger_func_name
;
6358 b
->enable_state
= bp_enabled
;
6359 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6360 b
->ops
= &gnu_v3_exception_catchpoint_ops
;
6367 /* Deal with "catch catch" and "catch throw" commands */
6370 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6371 int tempflag
, int from_tty
)
6373 char *cond_string
= NULL
;
6374 struct symtab_and_line
*sal
= NULL
;
6376 ep_skip_leading_whitespace (&arg
);
6378 cond_string
= ep_parse_optional_if_clause (&arg
);
6380 if ((*arg
!= '\0') && !isspace (*arg
))
6381 error ("Junk at end of arguments.");
6383 if ((ex_event
!= EX_EVENT_THROW
) &&
6384 (ex_event
!= EX_EVENT_CATCH
))
6385 error ("Unsupported or unknown exception event; cannot catch it");
6387 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6390 /* See if we can find a callback routine */
6391 sal
= target_enable_exception_callback (ex_event
, 1);
6395 /* We have callbacks from the runtime system for exceptions.
6396 Set a breakpoint on the sal found, if no errors */
6397 if (sal
!= (struct symtab_and_line
*) -1)
6398 create_exception_catchpoint (tempflag
, cond_string
, ex_event
, sal
);
6400 return; /* something went wrong with setting up callbacks */
6403 warning ("Unsupported with this platform/compiler combination.");
6406 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6407 inside a catch_errors */
6410 cover_target_enable_exception_callback (void *arg
)
6412 args_for_catchpoint_enable
*args
= arg
;
6413 struct symtab_and_line
*sal
;
6414 sal
= target_enable_exception_callback (args
->kind
, args
->enable_p
);
6417 else if (sal
== (struct symtab_and_line
*) -1)
6420 return 1; /*is valid */
6424 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6427 /* The first argument may be an event name, such as "start" or "load".
6428 If so, then handle it as such. If it doesn't match an event name,
6429 then attempt to interpret it as an exception name. (This latter is
6430 the v4.16-and-earlier GDB meaning of the "catch" command.)
6432 First, try to find the bounds of what might be an event name. */
6433 char *arg1_start
= arg
;
6437 if (arg1_start
== NULL
)
6439 /* Old behaviour was to use pre-v-4.16 syntax */
6440 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6442 /* Now, this is not allowed */
6443 error ("Catch requires an event name.");
6446 arg1_end
= ep_find_event_name_end (arg1_start
);
6447 if (arg1_end
== NULL
)
6448 error ("catch requires an event");
6449 arg1_length
= arg1_end
+ 1 - arg1_start
;
6451 /* Try to match what we found against known event names. */
6452 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6454 error ("Catch of signal not yet implemented");
6456 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6458 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6459 tempflag
, from_tty
);
6461 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6463 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6464 tempflag
, from_tty
);
6466 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6468 error ("Catch of thread_start not yet implemented");
6470 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6472 error ("Catch of thread_exit not yet implemented");
6474 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6476 error ("Catch of thread_join not yet implemented");
6478 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6480 error ("Catch of start not yet implemented");
6482 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6484 error ("Catch of exit not yet implemented");
6486 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6488 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6490 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6492 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6494 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6496 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6498 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6500 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6502 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6504 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6506 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6508 error ("Catch of stop not yet implemented");
6511 /* This doesn't appear to be an event name */
6515 /* Pre-v.4.16 behaviour was to treat the argument
6516 as the name of an exception */
6517 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6518 /* Now this is not allowed */
6519 error ("Unknown event kind specified for catch");
6524 /* Used by the gui, could be made a worker for other things. */
6527 set_breakpoint_sal (struct symtab_and_line sal
)
6529 struct breakpoint
*b
;
6530 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6531 set_breakpoint_count (breakpoint_count
+ 1);
6532 b
->number
= breakpoint_count
;
6539 catch_command (char *arg
, int from_tty
)
6541 catch_command_1 (arg
, 0, from_tty
);
6546 tcatch_command (char *arg
, int from_tty
)
6548 catch_command_1 (arg
, 1, from_tty
);
6551 /* Delete breakpoints by address or line. */
6554 clear_command (char *arg
, int from_tty
)
6556 struct breakpoint
*b
, *tmp
, *prev
, *found
;
6558 struct symtabs_and_lines sals
;
6559 struct symtab_and_line sal
;
6564 sals
= decode_line_spec (arg
, 1);
6569 sals
.sals
= (struct symtab_and_line
*)
6570 xmalloc (sizeof (struct symtab_and_line
));
6571 make_cleanup (xfree
, sals
.sals
);
6572 init_sal (&sal
); /* initialize to zeroes */
6573 sal
.line
= default_breakpoint_line
;
6574 sal
.symtab
= default_breakpoint_symtab
;
6575 sal
.pc
= default_breakpoint_address
;
6576 if (sal
.symtab
== 0)
6577 error ("No source file specified.");
6585 /* For each line spec given, delete bps which correspond
6586 to it. Do it in two passes, solely to preserve the current
6587 behavior that from_tty is forced true if we delete more than
6591 for (i
= 0; i
< sals
.nelts
; i
++)
6593 /* If exact pc given, clear bpts at that pc.
6594 If line given (pc == 0), clear all bpts on specified line.
6595 If defaulting, clear all bpts on default line
6598 defaulting sal.pc != 0 tests to do
6603 1 0 <can't happen> */
6608 /* Find all matching breakpoints, remove them from the
6609 breakpoint chain, and add them to the 'found' chain. */
6610 ALL_BREAKPOINTS_SAFE (b
, tmp
)
6612 /* Are we going to delete b? */
6613 if (b
->type
!= bp_none
6614 && b
->type
!= bp_watchpoint
6615 && b
->type
!= bp_hardware_watchpoint
6616 && b
->type
!= bp_read_watchpoint
6617 && b
->type
!= bp_access_watchpoint
6618 /* Not if b is a watchpoint of any sort... */
6619 && (((sal
.pc
&& (b
->loc
->address
== sal
.pc
))
6620 && (!section_is_overlay (b
->loc
->section
)
6621 || b
->loc
->section
== sal
.section
))
6622 /* Yes, if sal.pc matches b (modulo overlays). */
6623 || ((default_match
|| (0 == sal
.pc
))
6624 && b
->source_file
!= NULL
6625 && sal
.symtab
!= NULL
6626 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6627 && b
->line_number
== sal
.line
)))
6628 /* Yes, if sal source file and line matches b. */
6630 /* Remove it from breakpoint_chain... */
6631 if (b
== breakpoint_chain
)
6633 /* b is at the head of the list */
6634 breakpoint_chain
= b
->next
;
6638 prev
->next
= b
->next
;
6640 /* And add it to 'found' chain. */
6646 /* Keep b, and keep a pointer to it. */
6651 /* Now go thru the 'found' chain and delete them. */
6655 error ("No breakpoint at %s.", arg
);
6657 error ("No breakpoint at this line.");
6661 from_tty
= 1; /* Always report if deleted more than one */
6663 printf_unfiltered ("Deleted breakpoint%s ", found
->next
? "s" : "");
6664 breakpoints_changed ();
6668 printf_unfiltered ("%d ", found
->number
);
6670 delete_breakpoint (found
);
6674 putchar_unfiltered ('\n');
6677 /* Delete breakpoint in BS if they are `delete' breakpoints and
6678 all breakpoints that are marked for deletion, whether hit or not.
6679 This is called after any breakpoint is hit, or after errors. */
6682 breakpoint_auto_delete (bpstat bs
)
6684 struct breakpoint
*b
, *temp
;
6686 for (; bs
; bs
= bs
->next
)
6687 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== disp_del
6689 delete_breakpoint (bs
->breakpoint_at
);
6691 ALL_BREAKPOINTS_SAFE (b
, temp
)
6693 if (b
->disposition
== disp_del_at_next_stop
)
6694 delete_breakpoint (b
);
6698 /* Delete a breakpoint and clean up all traces of it in the data
6702 delete_breakpoint (struct breakpoint
*bpt
)
6704 struct breakpoint
*b
;
6706 struct bp_location
*loc
;
6709 error ("Internal error (attempted to delete a NULL breakpoint)");
6712 /* Has this bp already been deleted? This can happen because multiple
6713 lists can hold pointers to bp's. bpstat lists are especial culprits.
6715 One example of this happening is a watchpoint's scope bp. When the
6716 scope bp triggers, we notice that the watchpoint is out of scope, and
6717 delete it. We also delete its scope bp. But the scope bp is marked
6718 "auto-deleting", and is already on a bpstat. That bpstat is then
6719 checked for auto-deleting bp's, which are deleted.
6721 A real solution to this problem might involve reference counts in bp's,
6722 and/or giving them pointers back to their referencing bpstat's, and
6723 teaching delete_breakpoint to only free a bp's storage when no more
6724 references were extent. A cheaper bandaid was chosen. */
6725 if (bpt
->type
== bp_none
)
6728 if (deprecated_delete_breakpoint_hook
)
6729 deprecated_delete_breakpoint_hook (bpt
);
6730 breakpoint_delete_event (bpt
->number
);
6732 if (bpt
->loc
->inserted
)
6733 remove_breakpoint (bpt
->loc
, mark_inserted
);
6735 free_valchain (bpt
->loc
);
6737 if (breakpoint_chain
== bpt
)
6738 breakpoint_chain
= bpt
->next
;
6740 if (bp_location_chain
== bpt
->loc
)
6741 bp_location_chain
= bpt
->loc
->next
;
6743 /* If we have callback-style exception catchpoints, don't go through
6744 the adjustments to the C++ runtime library etc. if the inferior
6745 isn't actually running. target_enable_exception_callback for a
6746 null target ops vector gives an undesirable error message, so we
6747 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6748 exceptions are supported in this way, it's OK for now. FIXME */
6749 if (ep_is_exception_catchpoint (bpt
) && target_has_execution
)
6751 /* Format possible error msg */
6752 char *message
= xstrprintf ("Error in deleting catchpoint %d:\n",
6754 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
6755 args_for_catchpoint_enable args
;
6756 args
.kind
= bpt
->type
== bp_catch_catch
?
6757 EX_EVENT_CATCH
: EX_EVENT_THROW
;
6759 catch_errors (cover_target_enable_exception_callback
, &args
,
6760 message
, RETURN_MASK_ALL
);
6761 do_cleanups (cleanups
);
6768 b
->next
= bpt
->next
;
6772 ALL_BP_LOCATIONS (loc
)
6773 if (loc
->next
== bpt
->loc
)
6775 loc
->next
= bpt
->loc
->next
;
6779 check_duplicates (bpt
);
6780 /* If this breakpoint was inserted, and there is another breakpoint
6781 at the same address, we need to insert the other breakpoint. */
6782 if (bpt
->loc
->inserted
6783 && bpt
->type
!= bp_hardware_watchpoint
6784 && bpt
->type
!= bp_read_watchpoint
6785 && bpt
->type
!= bp_access_watchpoint
6786 && bpt
->type
!= bp_catch_fork
6787 && bpt
->type
!= bp_catch_vfork
6788 && bpt
->type
!= bp_catch_exec
)
6791 if (b
->loc
->address
== bpt
->loc
->address
6792 && b
->loc
->section
== bpt
->loc
->section
6793 && !b
->loc
->duplicate
6794 && b
->enable_state
!= bp_disabled
6795 && b
->enable_state
!= bp_shlib_disabled
6797 && b
->enable_state
!= bp_call_disabled
)
6801 /* We should never reach this point if there is a permanent
6802 breakpoint at the same address as the one being deleted.
6803 If there is a permanent breakpoint somewhere, it should
6804 always be the only one inserted. */
6805 if (b
->enable_state
== bp_permanent
)
6806 internal_error (__FILE__
, __LINE__
,
6807 "another breakpoint was inserted on top of "
6808 "a permanent breakpoint");
6810 if (b
->type
== bp_hardware_breakpoint
)
6811 val
= target_insert_hw_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
6813 val
= target_insert_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
6815 /* If there was an error in the insert, print a message, then stop execution. */
6818 struct ui_file
*tmp_error_stream
= mem_fileopen ();
6819 make_cleanup_ui_file_delete (tmp_error_stream
);
6822 if (b
->type
== bp_hardware_breakpoint
)
6824 fprintf_unfiltered (tmp_error_stream
,
6825 "Cannot insert hardware breakpoint %d.\n"
6826 "You may have requested too many hardware breakpoints.\n",
6831 fprintf_unfiltered (tmp_error_stream
, "Cannot insert breakpoint %d.\n", b
->number
);
6832 fprintf_filtered (tmp_error_stream
, "Error accessing memory address ");
6833 print_address_numeric (b
->loc
->address
, 1, tmp_error_stream
);
6834 fprintf_filtered (tmp_error_stream
, ": %s.\n",
6835 safe_strerror (val
));
6838 fprintf_unfiltered (tmp_error_stream
,"The same program may be running in another process.");
6839 target_terminal_ours_for_output ();
6840 error_stream(tmp_error_stream
);
6843 b
->loc
->inserted
= 1;
6847 free_command_lines (&bpt
->commands
);
6850 if (bpt
->cond_string
!= NULL
)
6851 xfree (bpt
->cond_string
);
6852 if (bpt
->addr_string
!= NULL
)
6853 xfree (bpt
->addr_string
);
6854 if (bpt
->exp
!= NULL
)
6856 if (bpt
->exp_string
!= NULL
)
6857 xfree (bpt
->exp_string
);
6858 if (bpt
->val
!= NULL
)
6859 value_free (bpt
->val
);
6860 if (bpt
->source_file
!= NULL
)
6861 xfree (bpt
->source_file
);
6862 if (bpt
->dll_pathname
!= NULL
)
6863 xfree (bpt
->dll_pathname
);
6864 if (bpt
->triggered_dll_pathname
!= NULL
)
6865 xfree (bpt
->triggered_dll_pathname
);
6866 if (bpt
->exec_pathname
!= NULL
)
6867 xfree (bpt
->exec_pathname
);
6869 /* Be sure no bpstat's are pointing at it after it's been freed. */
6870 /* FIXME, how can we find all bpstat's?
6871 We just check stop_bpstat for now. */
6872 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
6873 if (bs
->breakpoint_at
== bpt
)
6875 bs
->breakpoint_at
= NULL
;
6877 /* bs->commands will be freed later. */
6879 /* On the chance that someone will soon try again to delete this same
6880 bp, we mark it as deleted before freeing its storage. */
6881 bpt
->type
= bp_none
;
6888 do_delete_breakpoint_cleanup (void *b
)
6890 delete_breakpoint (b
);
6894 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
6896 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
6900 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
6902 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
6906 delete_command (char *arg
, int from_tty
)
6908 struct breakpoint
*b
, *temp
;
6914 int breaks_to_delete
= 0;
6916 /* Delete all breakpoints if no argument.
6917 Do not delete internal or call-dummy breakpoints, these
6918 have to be deleted with an explicit breakpoint number argument. */
6921 if (b
->type
!= bp_call_dummy
&&
6922 b
->type
!= bp_shlib_event
&&
6923 b
->type
!= bp_thread_event
&&
6924 b
->type
!= bp_overlay_event
&&
6926 breaks_to_delete
= 1;
6929 /* Ask user only if there are some breakpoints to delete. */
6931 || (breaks_to_delete
&& query ("Delete all breakpoints? ")))
6933 ALL_BREAKPOINTS_SAFE (b
, temp
)
6935 if (b
->type
!= bp_call_dummy
&&
6936 b
->type
!= bp_shlib_event
&&
6937 b
->type
!= bp_thread_event
&&
6938 b
->type
!= bp_overlay_event
&&
6940 delete_breakpoint (b
);
6945 map_breakpoint_numbers (arg
, delete_breakpoint
);
6948 /* Reset a breakpoint given it's struct breakpoint * BINT.
6949 The value we return ends up being the return value from catch_errors.
6950 Unused in this case. */
6953 breakpoint_re_set_one (void *bint
)
6955 /* get past catch_errs */
6956 struct breakpoint
*b
= (struct breakpoint
*) bint
;
6960 int *not_found_ptr
= NULL
;
6961 struct symtabs_and_lines sals
;
6963 enum enable_state save_enable
;
6968 warning ("attempted to reset apparently deleted breakpoint #%d?",
6972 case bp_hardware_breakpoint
:
6974 case bp_catch_unload
:
6975 if (b
->addr_string
== NULL
)
6977 /* Anything without a string can't be re-set. */
6978 delete_breakpoint (b
);
6981 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
6983 ``And a hack it is, although Apple's Darwin version of GDB
6984 contains an almost identical hack to implement a "future
6985 break" command. It seems to work in many real world cases,
6986 but it is easy to come up with a test case where the patch
6987 doesn't help at all.''
6989 ``It seems that the way GDB implements breakpoints - in -
6990 shared - libraries was designed for a.out shared library
6991 systems (SunOS 4) where shared libraries were loaded at a
6992 fixed address in memory. Since ELF shared libraries can (and
6993 will) be loaded at any address in memory, things break.
6994 Fixing this is not trivial. Therefore, I'm not sure whether
6995 we should add this hack to the branch only. I cannot
6996 guarantee that things will be fixed on the trunk in the near
6999 In case we have a problem, disable this breakpoint. We'll
7000 restore its status if we succeed. Don't disable a
7001 shlib_disabled breakpoint though. There's a fair chance we
7002 can't re-set it if the shared library it's in hasn't been
7008 save_enable
= b
->enable_state
;
7009 if (b
->enable_state
!= bp_shlib_disabled
)
7010 b
->enable_state
= bp_disabled
;
7012 /* If resetting a shlib-disabled breakpoint, we don't want to
7013 see an error message if it is not found since we will expect
7014 this to occur until the shared library is finally reloaded.
7015 We accomplish this by giving decode_line_1 a pointer to use
7016 for silent notification that the symbol is not found. */
7017 not_found_ptr
= ¬_found
;
7019 set_language (b
->language
);
7020 input_radix
= b
->input_radix
;
7022 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
,
7024 for (i
= 0; i
< sals
.nelts
; i
++)
7026 resolve_sal_pc (&sals
.sals
[i
]);
7028 /* Reparse conditions, they might contain references to the
7030 if (b
->cond_string
!= NULL
)
7036 /* Avoid re-freeing b->exp if an error during the call
7040 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
7043 /* We need to re-set the breakpoint if the address changes... */
7044 if (b
->loc
->address
!= sals
.sals
[i
].pc
7045 /* ...or new and old breakpoints both have source files, and
7046 the source file name or the line number changes... */
7047 || (b
->source_file
!= NULL
7048 && sals
.sals
[i
].symtab
!= NULL
7049 && (strcmp (b
->source_file
, sals
.sals
[i
].symtab
->filename
) != 0
7050 || b
->line_number
!= sals
.sals
[i
].line
)
7052 /* ...or we switch between having a source file and not having
7054 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
7057 if (b
->source_file
!= NULL
)
7058 xfree (b
->source_file
);
7059 if (sals
.sals
[i
].symtab
== NULL
)
7060 b
->source_file
= NULL
;
7063 savestring (sals
.sals
[i
].symtab
->filename
,
7064 strlen (sals
.sals
[i
].symtab
->filename
));
7065 b
->line_number
= sals
.sals
[i
].line
;
7066 b
->loc
->requested_address
= sals
.sals
[i
].pc
;
7068 = adjust_breakpoint_address (b
->loc
->requested_address
,
7071 /* Used to check for duplicates here, but that can
7072 cause trouble, as it doesn't check for disabled
7077 /* Might be better to do this just once per breakpoint_re_set,
7078 rather than once for every breakpoint. */
7079 breakpoints_changed ();
7081 b
->loc
->section
= sals
.sals
[i
].section
;
7082 b
->enable_state
= save_enable
; /* Restore it, this worked. */
7085 /* Now that this is re-enabled, check_duplicates
7087 check_duplicates (b
);
7094 case bp_hardware_watchpoint
:
7095 case bp_read_watchpoint
:
7096 case bp_access_watchpoint
:
7097 innermost_block
= NULL
;
7098 /* The issue arises of what context to evaluate this in. The
7099 same one as when it was set, but what does that mean when
7100 symbols have been re-read? We could save the filename and
7101 functionname, but if the context is more local than that, the
7102 best we could do would be something like how many levels deep
7103 and which index at that particular level, but that's going to
7104 be less stable than filenames or function names. */
7106 /* So for now, just use a global context. */
7110 /* Avoid re-freeing b->exp if an error during the call to
7111 parse_expression. */
7114 b
->exp
= parse_expression (b
->exp_string
);
7115 b
->exp_valid_block
= innermost_block
;
7116 mark
= value_mark ();
7119 value_free (b
->val
);
7120 /* Avoid re-freeing b->val if an error during the call to
7121 evaluate_expression. */
7124 b
->val
= evaluate_expression (b
->exp
);
7125 release_value (b
->val
);
7126 if (VALUE_LAZY (b
->val
) && breakpoint_enabled (b
))
7127 value_fetch_lazy (b
->val
);
7129 if (b
->cond_string
!= NULL
)
7135 /* Avoid re-freeing b->exp if an error during the call
7139 b
->cond
= parse_exp_1 (&s
, (struct block
*) 0, 0);
7141 if (breakpoint_enabled (b
))
7143 value_free_to_mark (mark
);
7145 case bp_catch_catch
:
7146 case bp_catch_throw
:
7148 /* We needn't really do anything to reset these, since the mask
7149 that requests them is unaffected by e.g., new libraries being
7152 case bp_catch_vfork
:
7157 printf_filtered ("Deleting unknown breakpoint type %d\n", b
->type
);
7159 /* Delete longjmp and overlay event breakpoints; they will be
7160 reset later by breakpoint_re_set. */
7162 case bp_longjmp_resume
:
7163 case bp_overlay_event
:
7164 delete_breakpoint (b
);
7167 /* This breakpoint is special, it's set up when the inferior
7168 starts and we really don't want to touch it. */
7169 case bp_shlib_event
:
7171 /* Like bp_shlib_event, this breakpoint type is special.
7172 Once it is set up, we do not want to touch it. */
7173 case bp_thread_event
:
7175 /* Keep temporary breakpoints, which can be encountered when we step
7176 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7177 Otherwise these should have been blown away via the cleanup chain
7178 or by breakpoint_init_inferior when we rerun the executable. */
7181 case bp_watchpoint_scope
:
7183 case bp_step_resume
:
7190 /* Re-set all breakpoints after symbols have been re-loaded. */
7192 breakpoint_re_set (void)
7194 struct breakpoint
*b
, *temp
;
7195 enum language save_language
;
7196 int save_input_radix
;
7198 save_language
= current_language
->la_language
;
7199 save_input_radix
= input_radix
;
7200 ALL_BREAKPOINTS_SAFE (b
, temp
)
7202 /* Format possible error msg */
7203 char *message
= xstrprintf ("Error in re-setting breakpoint %d:\n",
7205 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7206 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7207 do_cleanups (cleanups
);
7209 set_language (save_language
);
7210 input_radix
= save_input_radix
;
7212 if (GET_LONGJMP_TARGET_P ())
7214 create_longjmp_breakpoint ("longjmp");
7215 create_longjmp_breakpoint ("_longjmp");
7216 create_longjmp_breakpoint ("siglongjmp");
7217 create_longjmp_breakpoint ("_siglongjmp");
7218 create_longjmp_breakpoint (NULL
);
7221 create_overlay_event_breakpoint ("_ovly_debug_event");
7224 /* Reset the thread number of this breakpoint:
7226 - If the breakpoint is for all threads, leave it as-is.
7227 - Else, reset it to the current thread for inferior_ptid. */
7229 breakpoint_re_set_thread (struct breakpoint
*b
)
7231 if (b
->thread
!= -1)
7233 if (in_thread_list (inferior_ptid
))
7234 b
->thread
= pid_to_thread_id (inferior_ptid
);
7238 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7239 If from_tty is nonzero, it prints a message to that effect,
7240 which ends with a period (no newline). */
7243 set_ignore_count (int bptnum
, int count
, int from_tty
)
7245 struct breakpoint
*b
;
7251 if (b
->number
== bptnum
)
7253 b
->ignore_count
= count
;
7257 printf_filtered ("Will stop next time breakpoint %d is reached.",
7259 else if (count
== 1)
7260 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7263 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7266 breakpoints_changed ();
7267 breakpoint_modify_event (b
->number
);
7271 error ("No breakpoint number %d.", bptnum
);
7274 /* Clear the ignore counts of all breakpoints. */
7276 breakpoint_clear_ignore_counts (void)
7278 struct breakpoint
*b
;
7281 b
->ignore_count
= 0;
7284 /* Command to set ignore-count of breakpoint N to COUNT. */
7287 ignore_command (char *args
, int from_tty
)
7293 error_no_arg ("a breakpoint number");
7295 num
= get_number (&p
);
7297 error ("bad breakpoint number: '%s'", args
);
7299 error ("Second argument (specified ignore-count) is missing.");
7301 set_ignore_count (num
,
7302 longest_to_int (value_as_long (parse_and_eval (p
))),
7305 printf_filtered ("\n");
7308 /* Call FUNCTION on each of the breakpoints
7309 whose numbers are given in ARGS. */
7312 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7317 struct breakpoint
*b
, *tmp
;
7321 error_no_arg ("one or more breakpoint numbers");
7328 num
= get_number_or_range (&p1
);
7331 warning ("bad breakpoint number at or near '%s'", p
);
7335 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7336 if (b
->number
== num
)
7338 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7341 if (related_breakpoint
)
7342 function (related_breakpoint
);
7346 printf_unfiltered ("No breakpoint number %d.\n", num
);
7352 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7353 If from_tty is nonzero, it prints a message to that effect,
7354 which ends with a period (no newline). */
7357 disable_breakpoint (struct breakpoint
*bpt
)
7359 /* Never disable a watchpoint scope breakpoint; we want to
7360 hit them when we leave scope so we can delete both the
7361 watchpoint and its scope breakpoint at that time. */
7362 if (bpt
->type
== bp_watchpoint_scope
)
7365 /* You can't disable permanent breakpoints. */
7366 if (bpt
->enable_state
== bp_permanent
)
7369 bpt
->enable_state
= bp_disabled
;
7371 check_duplicates (bpt
);
7373 if (deprecated_modify_breakpoint_hook
)
7374 deprecated_modify_breakpoint_hook (bpt
);
7375 breakpoint_modify_event (bpt
->number
);
7379 disable_command (char *args
, int from_tty
)
7381 struct breakpoint
*bpt
;
7383 ALL_BREAKPOINTS (bpt
)
7387 warning ("attempted to disable apparently deleted breakpoint #%d?",
7392 case bp_catch_unload
:
7394 case bp_catch_vfork
:
7396 case bp_catch_catch
:
7397 case bp_catch_throw
:
7398 case bp_hardware_breakpoint
:
7400 case bp_hardware_watchpoint
:
7401 case bp_read_watchpoint
:
7402 case bp_access_watchpoint
:
7403 disable_breakpoint (bpt
);
7408 map_breakpoint_numbers (args
, disable_breakpoint
);
7412 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7414 int target_resources_ok
, other_type_used
;
7417 if (bpt
->type
== bp_hardware_breakpoint
)
7420 i
= hw_breakpoint_used_count ();
7421 target_resources_ok
=
7422 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7424 if (target_resources_ok
== 0)
7425 error ("No hardware breakpoint support in the target.");
7426 else if (target_resources_ok
< 0)
7427 error ("Hardware breakpoints used exceeds limit.");
7432 if (bpt
->enable_state
!= bp_enabled
)
7434 /* When enabling a pending breakpoint, we need to check if the breakpoint
7435 is resolvable since shared libraries could have been loaded
7436 after the breakpoint was disabled. */
7437 breakpoints_changed ();
7438 if (resolve_pending_breakpoint (bpt
) == GDB_RC_OK
)
7440 delete_breakpoint (bpt
);
7443 bpt
->enable_state
= bp_enabled
;
7444 bpt
->disposition
= disposition
;
7447 else /* Not a pending breakpoint. */
7449 if (bpt
->enable_state
!= bp_permanent
)
7450 bpt
->enable_state
= bp_enabled
;
7451 bpt
->disposition
= disposition
;
7452 check_duplicates (bpt
);
7453 breakpoints_changed ();
7455 if (bpt
->type
== bp_watchpoint
||
7456 bpt
->type
== bp_hardware_watchpoint
||
7457 bpt
->type
== bp_read_watchpoint
||
7458 bpt
->type
== bp_access_watchpoint
)
7460 struct frame_id saved_frame_id
;
7462 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
7463 if (bpt
->exp_valid_block
!= NULL
)
7465 struct frame_info
*fr
=
7466 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7470 Cannot enable watchpoint %d because the block in which its expression\n\
7471 is valid is not currently in scope.\n", bpt
->number
);
7472 bpt
->enable_state
= bp_disabled
;
7478 value_free (bpt
->val
);
7479 mark
= value_mark ();
7480 bpt
->val
= evaluate_expression (bpt
->exp
);
7481 release_value (bpt
->val
);
7482 if (VALUE_LAZY (bpt
->val
))
7483 value_fetch_lazy (bpt
->val
);
7485 if (bpt
->type
== bp_hardware_watchpoint
||
7486 bpt
->type
== bp_read_watchpoint
||
7487 bpt
->type
== bp_access_watchpoint
)
7489 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7490 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7492 /* Hack around 'unused var' error for some targets here */
7494 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7495 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7496 /* we can consider of type is bp_hardware_watchpoint, convert to
7497 bp_watchpoint in the following condition */
7498 if (target_resources_ok
< 0)
7501 Cannot enable watchpoint %d because target watch resources\n\
7502 have been allocated for other watchpoints.\n", bpt
->number
);
7503 bpt
->enable_state
= bp_disabled
;
7504 value_free_to_mark (mark
);
7509 select_frame (frame_find_by_id (saved_frame_id
));
7510 value_free_to_mark (mark
);
7514 if (deprecated_modify_breakpoint_hook
)
7515 deprecated_modify_breakpoint_hook (bpt
);
7516 breakpoint_modify_event (bpt
->number
);
7520 enable_breakpoint (struct breakpoint
*bpt
)
7522 do_enable_breakpoint (bpt
, bpt
->disposition
);
7525 /* The enable command enables the specified breakpoints (or all defined
7526 breakpoints) so they once again become (or continue to be) effective
7527 in stopping the inferior. */
7530 enable_command (char *args
, int from_tty
)
7532 struct breakpoint
*bpt
;
7534 ALL_BREAKPOINTS (bpt
)
7538 warning ("attempted to enable apparently deleted breakpoint #%d?",
7543 case bp_catch_unload
:
7545 case bp_catch_vfork
:
7547 case bp_catch_catch
:
7548 case bp_catch_throw
:
7549 case bp_hardware_breakpoint
:
7551 case bp_hardware_watchpoint
:
7552 case bp_read_watchpoint
:
7553 case bp_access_watchpoint
:
7554 enable_breakpoint (bpt
);
7559 map_breakpoint_numbers (args
, enable_breakpoint
);
7563 enable_once_breakpoint (struct breakpoint
*bpt
)
7565 do_enable_breakpoint (bpt
, disp_disable
);
7569 enable_once_command (char *args
, int from_tty
)
7571 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7575 enable_delete_breakpoint (struct breakpoint
*bpt
)
7577 do_enable_breakpoint (bpt
, disp_del
);
7581 enable_delete_command (char *args
, int from_tty
)
7583 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7587 set_breakpoint_cmd (char *args
, int from_tty
)
7592 show_breakpoint_cmd (char *args
, int from_tty
)
7596 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7598 struct symtabs_and_lines
7599 decode_line_spec_1 (char *string
, int funfirstline
)
7601 struct symtabs_and_lines sals
;
7603 error ("Empty line specification.");
7604 if (default_breakpoint_valid
)
7605 sals
= decode_line_1 (&string
, funfirstline
,
7606 default_breakpoint_symtab
,
7607 default_breakpoint_line
,
7608 (char ***) NULL
, NULL
);
7610 sals
= decode_line_1 (&string
, funfirstline
,
7611 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
7613 error ("Junk at end of line specification: %s", string
);
7618 _initialize_breakpoint (void)
7620 static struct cmd_list_element
*breakpoint_set_cmdlist
;
7621 static struct cmd_list_element
*breakpoint_show_cmdlist
;
7622 struct cmd_list_element
*c
;
7625 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
7628 breakpoint_chain
= 0;
7629 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7630 before a breakpoint is set. */
7631 breakpoint_count
= 0;
7633 add_com ("ignore", class_breakpoint
, ignore_command
,
7634 "Set ignore-count of breakpoint number N to COUNT.\n\
7635 Usage is `ignore N COUNT'.");
7637 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
7639 add_com ("commands", class_breakpoint
, commands_command
,
7640 "Set commands to be executed when a breakpoint is hit.\n\
7641 Give breakpoint number as argument after \"commands\".\n\
7642 With no argument, the targeted breakpoint is the last one set.\n\
7643 The commands themselves follow starting on the next line.\n\
7644 Type a line containing \"end\" to indicate the end of them.\n\
7645 Give \"silent\" as the first line to make the breakpoint silent;\n\
7646 then no output is printed when it is hit, except what the commands print.");
7648 add_com ("condition", class_breakpoint
, condition_command
,
7649 "Specify breakpoint number N to break only if COND is true.\n\
7650 Usage is `condition N COND', where N is an integer and COND is an\n\
7651 expression to be evaluated whenever breakpoint N is reached.");
7653 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
,
7654 "Set a temporary breakpoint. Args like \"break\" command.\n\
7655 Like \"break\" except the breakpoint is only temporary,\n\
7656 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7657 by using \"enable delete\" on the breakpoint number.");
7658 set_cmd_completer (c
, location_completer
);
7660 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
,
7661 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7662 Like \"break\" except the breakpoint requires hardware support,\n\
7663 some target hardware may not have this support.");
7664 set_cmd_completer (c
, location_completer
);
7666 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
,
7667 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7668 Like \"hbreak\" except the breakpoint is only temporary,\n\
7669 so it will be deleted when hit.");
7670 set_cmd_completer (c
, location_completer
);
7672 add_prefix_cmd ("enable", class_breakpoint
, enable_command
,
7673 "Enable some breakpoints.\n\
7674 Give breakpoint numbers (separated by spaces) as arguments.\n\
7675 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7676 This is used to cancel the effect of the \"disable\" command.\n\
7677 With a subcommand you can enable temporarily.",
7678 &enablelist
, "enable ", 1, &cmdlist
);
7680 add_com ("ab", class_breakpoint
, enable_command
,
7681 "Enable some breakpoints.\n\
7682 Give breakpoint numbers (separated by spaces) as arguments.\n\
7683 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7684 This is used to cancel the effect of the \"disable\" command.\n\
7685 With a subcommand you can enable temporarily.");
7687 add_com_alias ("en", "enable", class_breakpoint
, 1);
7689 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
,
7690 "Enable some breakpoints.\n\
7691 Give breakpoint numbers (separated by spaces) as arguments.\n\
7692 This is used to cancel the effect of the \"disable\" command.\n\
7693 May be abbreviated to simply \"enable\".\n",
7694 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
7696 add_cmd ("once", no_class
, enable_once_command
,
7697 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7698 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7701 add_cmd ("delete", no_class
, enable_delete_command
,
7702 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7703 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7706 add_cmd ("delete", no_class
, enable_delete_command
,
7707 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7708 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7711 add_cmd ("once", no_class
, enable_once_command
,
7712 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7713 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7716 add_prefix_cmd ("disable", class_breakpoint
, disable_command
,
7717 "Disable some breakpoints.\n\
7718 Arguments are breakpoint numbers with spaces in between.\n\
7719 To disable all breakpoints, give no argument.\n\
7720 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7721 &disablelist
, "disable ", 1, &cmdlist
);
7722 add_com_alias ("dis", "disable", class_breakpoint
, 1);
7723 add_com_alias ("disa", "disable", class_breakpoint
, 1);
7725 add_com ("sb", class_breakpoint
, disable_command
,
7726 "Disable some breakpoints.\n\
7727 Arguments are breakpoint numbers with spaces in between.\n\
7728 To disable all breakpoints, give no argument.\n\
7729 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7731 add_cmd ("breakpoints", class_alias
, disable_command
,
7732 "Disable some breakpoints.\n\
7733 Arguments are breakpoint numbers with spaces in between.\n\
7734 To disable all breakpoints, give no argument.\n\
7735 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7736 This command may be abbreviated \"disable\".",
7739 add_prefix_cmd ("delete", class_breakpoint
, delete_command
,
7740 "Delete some breakpoints or auto-display expressions.\n\
7741 Arguments are breakpoint numbers with spaces in between.\n\
7742 To delete all breakpoints, give no argument.\n\
7744 Also a prefix command for deletion of other GDB objects.\n\
7745 The \"unset\" command is also an alias for \"delete\".",
7746 &deletelist
, "delete ", 1, &cmdlist
);
7747 add_com_alias ("d", "delete", class_breakpoint
, 1);
7749 add_com ("db", class_breakpoint
, delete_command
,
7750 "Delete some breakpoints.\n\
7751 Arguments are breakpoint numbers with spaces in between.\n\
7752 To delete all breakpoints, give no argument.\n");
7754 add_cmd ("breakpoints", class_alias
, delete_command
,
7755 "Delete some breakpoints or auto-display expressions.\n\
7756 Arguments are breakpoint numbers with spaces in between.\n\
7757 To delete all breakpoints, give no argument.\n\
7758 This command may be abbreviated \"delete\".",
7761 add_com ("clear", class_breakpoint
, clear_command
,
7762 concat ("Clear breakpoint at specified line or function.\n\
7763 Argument may be line number, function name, or \"*\" and an address.\n\
7764 If line number is specified, all breakpoints in that line are cleared.\n\
7765 If function is specified, breakpoints at beginning of function are cleared.\n\
7766 If an address is specified, breakpoints at that address are cleared.\n\n",
7767 "With no argument, clears all breakpoints in the line that the selected frame\n\
7770 See also the \"delete\" command which clears breakpoints by number.", NULL
));
7772 c
= add_com ("break", class_breakpoint
, break_command
,
7773 concat ("Set breakpoint at specified line or function.\n\
7774 Argument may be line number, function name, or \"*\" and an address.\n\
7775 If line number is specified, break at start of code for that line.\n\
7776 If function is specified, break at start of code for that function.\n\
7777 If an address is specified, break at that exact address.\n",
7778 "With no arg, uses current execution address of selected stack frame.\n\
7779 This is useful for breaking on return to a stack frame.\n\
7781 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7783 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL
));
7784 set_cmd_completer (c
, location_completer
);
7786 add_com_alias ("b", "break", class_run
, 1);
7787 add_com_alias ("br", "break", class_run
, 1);
7788 add_com_alias ("bre", "break", class_run
, 1);
7789 add_com_alias ("brea", "break", class_run
, 1);
7793 add_com_alias ("ba", "break", class_breakpoint
, 1);
7794 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
7799 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
,
7800 "Break in function/address or break at a line in the current file.",
7801 &stoplist
, "stop ", 1, &cmdlist
);
7802 add_cmd ("in", class_breakpoint
, stopin_command
,
7803 "Break in function or address.\n", &stoplist
);
7804 add_cmd ("at", class_breakpoint
, stopat_command
,
7805 "Break at a line in the current file.\n", &stoplist
);
7806 add_com ("status", class_info
, breakpoints_info
,
7807 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7808 The \"Type\" column indicates one of:\n\
7809 \tbreakpoint - normal breakpoint\n\
7810 \twatchpoint - watchpoint\n\
7811 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7812 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7813 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7814 address and file/line number respectively.\n\n",
7815 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7816 are set to the address of the last breakpoint listed.\n\n\
7817 Convenience variable \"$bpnum\" contains the number of the last\n\
7818 breakpoint set.", NULL
));
7821 add_info ("breakpoints", breakpoints_info
,
7822 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7823 The \"Type\" column indicates one of:\n\
7824 \tbreakpoint - normal breakpoint\n\
7825 \twatchpoint - watchpoint\n\
7826 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7827 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7828 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7829 address and file/line number respectively.\n\n",
7830 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7831 are set to the address of the last breakpoint listed.\n\n\
7832 Convenience variable \"$bpnum\" contains the number of the last\n\
7833 breakpoint set.", NULL
));
7836 add_com ("lb", class_breakpoint
, breakpoints_info
,
7837 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7838 The \"Type\" column indicates one of:\n\
7839 \tbreakpoint - normal breakpoint\n\
7840 \twatchpoint - watchpoint\n\
7841 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7842 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7843 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7844 address and file/line number respectively.\n\n",
7845 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7846 are set to the address of the last breakpoint listed.\n\n\
7847 Convenience variable \"$bpnum\" contains the number of the last\n\
7848 breakpoint set.", NULL
));
7850 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
,
7851 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7852 The \"Type\" column indicates one of:\n\
7853 \tbreakpoint - normal breakpoint\n\
7854 \twatchpoint - watchpoint\n\
7855 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7856 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7857 \tuntil - internal breakpoint used by the \"until\" command\n\
7858 \tfinish - internal breakpoint used by the \"finish\" command\n",
7859 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7860 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7861 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7862 address and file/line number respectively.\n\n",
7863 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7864 are set to the address of the last breakpoint listed.\n\n\
7865 Convenience variable \"$bpnum\" contains the number of the last\n\
7866 breakpoint set.", NULL
),
7867 &maintenanceinfolist
);
7869 add_com ("catch", class_breakpoint
, catch_command
,
7870 "Set catchpoints to catch events.\n\
7871 Raised signals may be caught:\n\
7872 \tcatch signal - all signals\n\
7873 \tcatch signal <signame> - a particular signal\n\
7874 Raised exceptions may be caught:\n\
7875 \tcatch throw - all exceptions, when thrown\n\
7876 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7877 \tcatch catch - all exceptions, when caught\n\
7878 \tcatch catch <exceptname> - a particular exception, when caught\n\
7879 Thread or process events may be caught:\n\
7880 \tcatch thread_start - any threads, just after creation\n\
7881 \tcatch thread_exit - any threads, just before expiration\n\
7882 \tcatch thread_join - any threads, just after joins\n\
7883 Process events may be caught:\n\
7884 \tcatch start - any processes, just after creation\n\
7885 \tcatch exit - any processes, just before expiration\n\
7886 \tcatch fork - calls to fork()\n\
7887 \tcatch vfork - calls to vfork()\n\
7888 \tcatch exec - calls to exec()\n\
7889 Dynamically-linked library events may be caught:\n\
7890 \tcatch load - loads of any library\n\
7891 \tcatch load <libname> - loads of a particular library\n\
7892 \tcatch unload - unloads of any library\n\
7893 \tcatch unload <libname> - unloads of a particular library\n\
7894 The act of your program's execution stopping may also be caught:\n\
7896 C++ exceptions may be caught:\n\
7897 \tcatch throw - all exceptions, when thrown\n\
7898 \tcatch catch - all exceptions, when caught\n\
7900 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7901 after a fork or vfork is caught.\n\n\
7902 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7904 add_com ("tcatch", class_breakpoint
, tcatch_command
,
7905 "Set temporary catchpoints to catch events.\n\
7906 Args like \"catch\" command.\n\
7907 Like \"catch\" except the catchpoint is only temporary,\n\
7908 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7909 by using \"enable delete\" on the catchpoint number.");
7911 c
= add_com ("watch", class_breakpoint
, watch_command
,
7912 "Set a watchpoint for an expression.\n\
7913 A watchpoint stops execution of your program whenever the value of\n\
7914 an expression changes.");
7915 set_cmd_completer (c
, location_completer
);
7917 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
,
7918 "Set a read watchpoint for an expression.\n\
7919 A watchpoint stops execution of your program whenever the value of\n\
7920 an expression is read.");
7921 set_cmd_completer (c
, location_completer
);
7923 c
= add_com ("awatch", class_breakpoint
, awatch_command
,
7924 "Set a watchpoint for an expression.\n\
7925 A watchpoint stops execution of your program whenever the value of\n\
7926 an expression is either read or written.");
7927 set_cmd_completer (c
, location_completer
);
7929 add_info ("watchpoints", breakpoints_info
,
7930 "Synonym for ``info breakpoints''.");
7933 c
= add_set_cmd ("can-use-hw-watchpoints", class_support
, var_zinteger
,
7934 (char *) &can_use_hw_watchpoints
,
7935 "Set debugger's willingness to use watchpoint hardware.\n\
7936 If zero, gdb will not use hardware for new watchpoints, even if\n\
7937 such is available. (However, any hardware watchpoints that were\n\
7938 created before setting this to nonzero, will continue to use watchpoint\n\
7941 deprecated_add_show_from_set (c
, &showlist
);
7943 can_use_hw_watchpoints
= 1;
7945 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, "\
7946 Breakpoint specific settings\n\
7947 Configure various breakpoint-specific variables such as\n\
7948 pending breakpoint behavior",
7949 &breakpoint_set_cmdlist
, "set breakpoint ",
7950 0/*allow-unknown*/, &setlist
);
7951 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, "\
7952 Breakpoint specific settings\n\
7953 Configure various breakpoint-specific variables such as\n\
7954 pending breakpoint behavior",
7955 &breakpoint_show_cmdlist
, "show breakpoint ",
7956 0/*allow-unknown*/, &showlist
);
7958 add_setshow_auto_boolean_cmd ("pending", no_class
, &pending_break_support
, "\
7959 Set debugger's behavior regarding pending breakpoints.", "\
7960 Show debugger's behavior regarding pending breakpoints.", "\
7961 If on, an unrecognized breakpoint location will cause gdb to create a\n\
7962 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
7963 an error. If auto, an unrecognized breakpoint location results in a\n\
7964 user-query to see if a pending breakpoint should be created.", "\
7965 Debugger's behavior regarding pending breakpoints is %s.",
7967 &breakpoint_set_cmdlist
,
7968 &breakpoint_show_cmdlist
);
7970 pending_break_support
= AUTO_BOOLEAN_AUTO
;