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, 2005
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 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"
54 #include "exceptions.h"
56 #include "gdb-events.h"
58 /* Prototypes for local functions. */
60 static void until_break_command_continuation (struct continuation_arg
*arg
);
62 static void catch_command_1 (char *, int, int);
64 static void enable_delete_command (char *, int);
66 static void enable_delete_breakpoint (struct breakpoint
*);
68 static void enable_once_command (char *, int);
70 static void enable_once_breakpoint (struct breakpoint
*);
72 static void disable_command (char *, int);
74 static void enable_command (char *, int);
76 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
78 static void ignore_command (char *, int);
80 static int breakpoint_re_set_one (void *);
82 static void clear_command (char *, int);
84 static void catch_command (char *, int);
86 static void watch_command (char *, int);
88 static int can_use_hardware_watchpoint (struct value
*);
90 static int break_command_1 (char *, int, int, struct breakpoint
*);
92 static void mention (struct breakpoint
*);
94 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
96 static void check_duplicates (struct breakpoint
*);
98 static void breakpoint_adjustment_warning (CORE_ADDR
, CORE_ADDR
, int, int);
100 static CORE_ADDR
adjust_breakpoint_address (CORE_ADDR bpaddr
,
103 static void describe_other_breakpoints (CORE_ADDR
, asection
*);
105 static void breakpoints_info (char *, int);
107 static void breakpoint_1 (int, int);
109 static bpstat
bpstat_alloc (struct breakpoint
*, bpstat
);
111 static int breakpoint_cond_eval (void *);
113 static void cleanup_executing_breakpoints (void *);
115 static void commands_command (char *, int);
117 static void condition_command (char *, int);
119 static int get_number_trailer (char **, int);
121 void set_breakpoint_count (int);
130 static int remove_breakpoint (struct bp_location
*, insertion_state_t
);
132 static enum print_stop_action
print_it_typical (bpstat
);
134 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
138 enum exception_event_kind kind
;
141 args_for_catchpoint_enable
;
143 static int watchpoint_check (void *);
145 static int cover_target_enable_exception_callback (void *);
147 static void maintenance_info_breakpoints (char *, int);
149 static void create_longjmp_breakpoint (char *);
151 static void create_overlay_event_breakpoint (char *);
153 static int hw_breakpoint_used_count (void);
155 static int hw_watchpoint_used_count (enum bptype
, int *);
157 static void hbreak_command (char *, int);
159 static void thbreak_command (char *, int);
161 static void watch_command_1 (char *, int, int);
163 static void rwatch_command (char *, int);
165 static void awatch_command (char *, int);
167 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
169 static void solib_load_unload_1 (char *hookname
,
172 char *cond_string
, enum bptype bp_kind
);
174 static void create_fork_vfork_event_catchpoint (int tempflag
,
176 enum bptype bp_kind
);
178 static void stop_command (char *arg
, int from_tty
);
180 static void stopin_command (char *arg
, int from_tty
);
182 static void stopat_command (char *arg
, int from_tty
);
184 static char *ep_find_event_name_end (char *arg
);
186 static char *ep_parse_optional_if_clause (char **arg
);
188 static char *ep_parse_optional_filename (char **arg
);
190 static void create_exception_catchpoint (int tempflag
, char *cond_string
,
191 enum exception_event_kind ex_event
,
192 struct symtab_and_line
*sal
);
194 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
195 char *arg
, int tempflag
, int from_tty
);
197 static void tcatch_command (char *arg
, int from_tty
);
199 static void ep_skip_leading_whitespace (char **s
);
201 /* Prototypes for exported functions. */
203 /* If FALSE, gdb will not use hardware support for watchpoints, even
204 if such is available. */
205 static int can_use_hw_watchpoints
;
207 /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints.
208 If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints
209 for unrecognized breakpoint locations.
210 If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */
211 static enum auto_boolean pending_break_support
;
213 void _initialize_breakpoint (void);
215 extern int addressprint
; /* Print machine addresses? */
217 /* Are we executing breakpoint commands? */
218 static int executing_breakpoint_commands
;
220 /* Are overlay event breakpoints enabled? */
221 static int overlay_events_enabled
;
223 /* Walk the following statement or block through all breakpoints.
224 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
227 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
229 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
230 for (B = breakpoint_chain; \
231 B ? (TMP=B->next, 1): 0; \
234 /* Similar iterators for the low-level breakpoints. */
236 #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->next)
238 #define ALL_BP_LOCATIONS_SAFE(B,TMP) \
239 for (B = bp_location_chain; \
240 B ? (TMP=B->next, 1): 0; \
243 /* True if breakpoint hit counts should be displayed in breakpoint info. */
245 int show_breakpoint_hit_counts
= 1;
247 /* Chains of all breakpoints defined. */
249 struct breakpoint
*breakpoint_chain
;
251 struct bp_location
*bp_location_chain
;
253 /* Number of last breakpoint made. */
255 int breakpoint_count
;
257 /* Pointer to current exception event record */
258 static struct exception_event_record
*current_exception_event
;
260 /* Indicator of whether exception catchpoints should be nuked between
261 runs of a program. */
262 int deprecated_exception_catchpoints_are_fragile
= 0;
264 /* Indicator of when exception catchpoints set-up should be
265 reinitialized -- e.g. when program is re-run. */
266 int deprecated_exception_support_initialized
= 0;
268 /* This function returns a pointer to the string representation of the
269 pathname of the dynamically-linked library that has just been
272 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
273 or undefined results are guaranteed.
275 This string's contents are only valid immediately after the
276 inferior has stopped in the dynamic linker hook, and becomes
277 invalid as soon as the inferior is continued. Clients should make
278 a copy of this string if they wish to continue the inferior and
279 then access the string. */
281 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
282 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
285 /* This function returns a pointer to the string representation of the
286 pathname of the dynamically-linked library that has just been
289 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
290 TRUE, or undefined results are guaranteed.
292 This string's contents are only valid immediately after the
293 inferior has stopped in the dynamic linker hook, and becomes
294 invalid as soon as the inferior is continued. Clients should make
295 a copy of this string if they wish to continue the inferior and
296 then access the string. */
298 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
299 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
302 /* This function is called by the "catch load" command. It allows the
303 debugger to be notified by the dynamic linker when a specified
304 library file (or any library file, if filename is NULL) is loaded. */
306 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
307 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
308 error ("catch of library loads not yet implemented on this platform")
311 /* This function is called by the "catch unload" command. It allows
312 the debugger to be notified by the dynamic linker when a specified
313 library file (or any library file, if filename is NULL) is
316 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
317 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid, tempflag, filename, cond_string) \
318 error ("catch of library unloads not yet implemented on this platform")
321 /* Return whether a breakpoint is an active enabled breakpoint. */
323 breakpoint_enabled (struct breakpoint
*b
)
325 return (b
->enable_state
== bp_enabled
&& !b
->pending
);
328 /* Set breakpoint count to NUM. */
331 set_breakpoint_count (int num
)
333 breakpoint_count
= num
;
334 set_internalvar (lookup_internalvar ("bpnum"),
335 value_from_longest (builtin_type_int
, (LONGEST
) num
));
338 /* Used in run_command to zero the hit count when a new run starts. */
341 clear_breakpoint_hit_counts (void)
343 struct breakpoint
*b
;
349 /* Default address, symtab and line to put a breakpoint at
350 for "break" command with no arg.
351 if default_breakpoint_valid is zero, the other three are
352 not valid, and "break" with no arg is an error.
354 This set by print_stack_frame, which calls set_default_breakpoint. */
356 int default_breakpoint_valid
;
357 CORE_ADDR default_breakpoint_address
;
358 struct symtab
*default_breakpoint_symtab
;
359 int default_breakpoint_line
;
361 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
362 Advance *PP after the string and any trailing whitespace.
364 Currently the string can either be a number or "$" followed by the name
365 of a convenience variable. Making it an expression wouldn't work well
366 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
368 TRAILER is a character which can be found after the number; most
369 commonly this is `-'. If you don't want a trailer, use \0. */
371 get_number_trailer (char **pp
, int trailer
)
373 int retval
= 0; /* default */
377 /* Empty line means refer to the last breakpoint. */
378 return breakpoint_count
;
381 /* Make a copy of the name, so we can null-terminate it
382 to pass to lookup_internalvar(). */
387 while (isalnum (*p
) || *p
== '_')
389 varname
= (char *) alloca (p
- start
+ 1);
390 strncpy (varname
, start
, p
- start
);
391 varname
[p
- start
] = '\0';
392 val
= value_of_internalvar (lookup_internalvar (varname
));
393 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_INT
)
394 retval
= (int) value_as_long (val
);
397 printf_filtered ("Convenience variable must have integer value.\n");
405 while (*p
>= '0' && *p
<= '9')
408 /* There is no number here. (e.g. "cond a == b"). */
410 /* Skip non-numeric token */
411 while (*p
&& !isspace((int) *p
))
413 /* Return zero, which caller must interpret as error. */
419 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
421 /* Trailing junk: return 0 and let caller print error msg. */
422 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
433 /* Like get_number_trailer, but don't allow a trailer. */
435 get_number (char **pp
)
437 return get_number_trailer (pp
, '\0');
440 /* Parse a number or a range.
441 * A number will be of the form handled by get_number.
442 * A range will be of the form <number1> - <number2>, and
443 * will represent all the integers between number1 and number2,
446 * While processing a range, this fuction is called iteratively;
447 * At each call it will return the next value in the range.
449 * At the beginning of parsing a range, the char pointer PP will
450 * be advanced past <number1> and left pointing at the '-' token.
451 * Subsequent calls will not advance the pointer until the range
452 * is completed. The call that completes the range will advance
453 * pointer PP past <number2>.
457 get_number_or_range (char **pp
)
459 static int last_retval
, end_value
;
460 static char *end_ptr
;
461 static int in_range
= 0;
465 /* Default case: pp is pointing either to a solo number,
466 or to the first number of a range. */
467 last_retval
= get_number_trailer (pp
, '-');
472 /* This is the start of a range (<number1> - <number2>).
473 Skip the '-', parse and remember the second number,
474 and also remember the end of the final token. */
478 while (isspace ((int) *end_ptr
))
479 end_ptr
++; /* skip white space */
480 end_value
= get_number (temp
);
481 if (end_value
< last_retval
)
483 error ("inverted range");
485 else if (end_value
== last_retval
)
487 /* degenerate range (number1 == number2). Advance the
488 token pointer so that the range will be treated as a
497 error ("negative value");
500 /* pp points to the '-' that betokens a range. All
501 number-parsing has already been done. Return the next
502 integer value (one greater than the saved previous value).
503 Do not advance the token pointer 'pp' until the end of range
506 if (++last_retval
== end_value
)
508 /* End of range reached; advance token pointer. */
518 /* condition N EXP -- set break condition of breakpoint N to EXP. */
521 condition_command (char *arg
, int from_tty
)
523 struct breakpoint
*b
;
528 error_no_arg ("breakpoint number");
531 bnum
= get_number (&p
);
533 error ("Bad breakpoint argument: '%s'", arg
);
536 if (b
->number
== bnum
)
543 if (b
->cond_string
!= NULL
)
544 xfree (b
->cond_string
);
549 b
->cond_string
= NULL
;
551 printf_filtered ("Breakpoint %d now unconditional.\n", bnum
);
556 /* I don't know if it matters whether this is the string the user
557 typed in or the decompiled expression. */
558 b
->cond_string
= savestring (arg
, strlen (arg
));
561 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->loc
->address
), 0);
563 error ("Junk at end of expression");
566 breakpoints_changed ();
567 breakpoint_modify_event (b
->number
);
571 error ("No breakpoint number %d.", bnum
);
575 commands_command (char *arg
, int from_tty
)
577 struct breakpoint
*b
;
580 struct command_line
*l
;
582 /* If we allowed this, we would have problems with when to
583 free the storage, if we change the commands currently
586 if (executing_breakpoint_commands
)
587 error ("Can't use the \"commands\" command among a breakpoint's commands.");
590 bnum
= get_number (&p
);
593 error ("Unexpected extra arguments following breakpoint number.");
596 if (b
->number
== bnum
)
598 char *tmpbuf
= xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
600 struct cleanup
*cleanups
= make_cleanup (xfree
, tmpbuf
);
601 l
= read_command_lines (tmpbuf
, from_tty
);
602 do_cleanups (cleanups
);
603 free_command_lines (&b
->commands
);
605 breakpoints_changed ();
606 breakpoint_modify_event (b
->number
);
609 error ("No breakpoint number %d.", bnum
);
612 /* Like target_read_memory() but if breakpoints are inserted, return
613 the shadow contents instead of the breakpoints themselves.
615 Read "memory data" from whatever target or inferior we have.
616 Returns zero if successful, errno value if not. EIO is used
617 for address out of bounds. If breakpoints are inserted, returns
618 shadow contents, not the breakpoints themselves. From breakpoint.c. */
621 deprecated_read_memory_nobpt (CORE_ADDR memaddr
, char *myaddr
, unsigned len
)
624 struct bp_location
*b
;
625 CORE_ADDR bp_addr
= 0;
628 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
629 /* No breakpoints on this machine. */
630 return target_read_memory (memaddr
, myaddr
, len
);
634 if (b
->owner
->type
== bp_none
)
635 warning ("reading through apparently deleted breakpoint #%d?",
638 if (b
->loc_type
!= bp_loc_software_breakpoint
)
642 /* Addresses and length of the part of the breakpoint that
644 /* XXXX The m68k, sh and h8300 have different local and remote
645 breakpoint values. BREAKPOINT_FROM_PC still manages to
646 correctly determine the breakpoints memory address and size
647 for these targets. */
648 bp_addr
= b
->address
;
650 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
655 if (bp_addr
+ bp_size
<= memaddr
)
656 /* The breakpoint is entirely before the chunk of memory we
659 if (bp_addr
>= memaddr
+ len
)
660 /* The breakpoint is entirely after the chunk of memory we are
663 /* Copy the breakpoint from the shadow contents, and recurse for
664 the things before and after. */
666 /* Offset within shadow_contents. */
669 if (bp_addr
< memaddr
)
671 /* Only copy the second part of the breakpoint. */
672 bp_size
-= memaddr
- bp_addr
;
673 bptoffset
= memaddr
- bp_addr
;
677 if (bp_addr
+ bp_size
> memaddr
+ len
)
679 /* Only copy the first part of the breakpoint. */
680 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
683 memcpy (myaddr
+ bp_addr
- memaddr
,
684 b
->shadow_contents
+ bptoffset
, bp_size
);
686 if (bp_addr
> memaddr
)
688 /* Copy the section of memory before the breakpoint. */
689 status
= deprecated_read_memory_nobpt (memaddr
, myaddr
, bp_addr
- memaddr
);
694 if (bp_addr
+ bp_size
< memaddr
+ len
)
696 /* Copy the section of memory after the breakpoint. */
697 status
= deprecated_read_memory_nobpt (bp_addr
+ bp_size
,
698 myaddr
+ bp_addr
+ bp_size
- memaddr
,
699 memaddr
+ len
- (bp_addr
+ bp_size
));
706 /* Nothing overlaps. Just call read_memory_noerr. */
707 return target_read_memory (memaddr
, myaddr
, len
);
711 /* A wrapper function for inserting catchpoints. */
713 insert_catchpoint (struct ui_out
*uo
, void *args
)
715 struct breakpoint
*b
= (struct breakpoint
*) args
;
721 val
= target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
724 val
= target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
727 val
= target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
730 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
735 throw_reason (RETURN_ERROR
);
740 /* Helper routine: free the value chain for a breakpoint (watchpoint). */
742 static void free_valchain (struct bp_location
*b
)
747 /* Free the saved value chain. We will construct a new one
748 the next time the watchpoint is inserted. */
749 for (v
= b
->owner
->val_chain
; v
; v
= n
)
754 b
->owner
->val_chain
= NULL
;
757 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
758 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
759 PROCESS_WARNING, and HW_BREAKPOINT_ERROR are used to report problems.
761 NOTE drow/2003-09-09: This routine could be broken down to an object-style
762 method for each breakpoint or catchpoint type. */
764 insert_bp_location (struct bp_location
*bpt
,
765 struct ui_file
*tmp_error_stream
,
766 int *disabled_breaks
, int *process_warning
,
767 int *hw_breakpoint_error
)
771 /* Permanent breakpoints cannot be inserted or removed. Disabled
772 breakpoints should not be inserted. */
773 if (!breakpoint_enabled (bpt
->owner
))
776 if (bpt
->inserted
|| bpt
->duplicate
)
779 if (bpt
->loc_type
== bp_loc_software_breakpoint
780 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
782 /* First check to see if we have to handle an overlay. */
783 if (overlay_debugging
== ovly_off
784 || bpt
->section
== NULL
785 || !(section_is_overlay (bpt
->section
)))
787 /* No overlay handling: just set the breakpoint. */
789 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
790 val
= target_insert_hw_breakpoint (bpt
->address
,
791 bpt
->shadow_contents
);
793 val
= target_insert_breakpoint (bpt
->address
,
794 bpt
->shadow_contents
);
798 /* This breakpoint is in an overlay section.
799 Shall we set a breakpoint at the LMA? */
800 if (!overlay_events_enabled
)
802 /* Yes -- overlay event support is not active,
803 so we must try to set a breakpoint at the LMA.
804 This will not work for a hardware breakpoint. */
805 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
806 warning ("hardware breakpoint %d not supported in overlay!\n",
810 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
812 /* Set a software (trap) breakpoint at the LMA. */
813 val
= target_insert_breakpoint (addr
, bpt
->shadow_contents
);
815 fprintf_unfiltered (tmp_error_stream
,
816 "Overlay breakpoint %d failed: in ROM?",
820 /* Shall we set a breakpoint at the VMA? */
821 if (section_is_mapped (bpt
->section
))
823 /* Yes. This overlay section is mapped into memory. */
824 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
825 val
= target_insert_hw_breakpoint (bpt
->address
,
826 bpt
->shadow_contents
);
828 val
= target_insert_breakpoint (bpt
->address
,
829 bpt
->shadow_contents
);
833 /* No. This breakpoint will not be inserted.
834 No error, but do not mark the bp as 'inserted'. */
841 /* Can't set the breakpoint. */
842 #if defined (DISABLE_UNSETTABLE_BREAK)
843 if (DISABLE_UNSETTABLE_BREAK (bpt
->address
))
845 /* See also: disable_breakpoints_in_shlibs. */
847 bpt
->owner
->enable_state
= bp_shlib_disabled
;
848 if (!*disabled_breaks
)
850 fprintf_unfiltered (tmp_error_stream
,
851 "Cannot insert breakpoint %d.\n",
853 fprintf_unfiltered (tmp_error_stream
,
854 "Temporarily disabling shared library breakpoints:\n");
856 *disabled_breaks
= 1;
857 fprintf_unfiltered (tmp_error_stream
,
858 "breakpoint #%d\n", bpt
->owner
->number
);
863 #ifdef ONE_PROCESS_WRITETEXT
864 *process_warning
= 1;
866 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
868 *hw_breakpoint_error
= 1;
869 fprintf_unfiltered (tmp_error_stream
,
870 "Cannot insert hardware breakpoint %d.\n",
875 fprintf_unfiltered (tmp_error_stream
,
876 "Cannot insert breakpoint %d.\n",
878 fprintf_filtered (tmp_error_stream
,
879 "Error accessing memory address ");
880 print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
881 fprintf_filtered (tmp_error_stream
, ": %s.\n",
882 safe_strerror (val
));
893 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
894 /* NOTE drow/2003-09-08: This state only exists for removing
895 watchpoints. It's not clear that it's necessary... */
896 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
898 /* FIXME drow/2003-09-08: This code sets multiple hardware watchpoints
899 based on the expression. Ideally this should happen at a higher level,
900 and there should be one bp_location for each computed address we
901 must watch. As soon as a many-to-one mapping is available I'll
904 int within_current_scope
;
905 struct value
*mark
= value_mark ();
907 struct frame_id saved_frame_id
;
909 /* Save the current frame's ID so we can restore it after
910 evaluating the watchpoint expression on its own frame. */
911 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
912 took a frame parameter, so that we didn't have to change the
914 saved_frame_id
= get_frame_id (deprecated_selected_frame
);
916 /* Determine if the watchpoint is within scope. */
917 if (bpt
->owner
->exp_valid_block
== NULL
)
918 within_current_scope
= 1;
921 struct frame_info
*fi
;
922 fi
= frame_find_by_id (bpt
->owner
->watchpoint_frame
);
923 within_current_scope
= (fi
!= NULL
);
924 if (within_current_scope
)
928 if (within_current_scope
)
932 /* Evaluate the expression and cut the chain of values
933 produced off from the value chain.
935 Make sure the value returned isn't lazy; we use
936 laziness to determine what memory GDB actually needed
937 in order to compute the value of the expression. */
938 v
= evaluate_expression (bpt
->owner
->exp
);
940 value_release_to_mark (mark
);
942 bpt
->owner
->val_chain
= v
;
945 /* Look at each value on the value chain. */
946 for (; v
; v
= v
->next
)
948 /* If it's a memory location, and GDB actually needed
949 its contents to evaluate the expression, then we
951 if (VALUE_LVAL (v
) == lval_memory
954 struct type
*vtype
= check_typedef (value_type (v
));
956 /* We only watch structs and arrays if user asked
957 for it explicitly, never if they just happen to
958 appear in the middle of some value chain. */
959 if (v
== bpt
->owner
->val_chain
960 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
961 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
966 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
967 len
= TYPE_LENGTH (value_type (v
));
969 if (bpt
->owner
->type
== bp_read_watchpoint
)
971 else if (bpt
->owner
->type
== bp_access_watchpoint
)
974 val
= target_insert_watchpoint (addr
, len
, type
);
977 /* Don't exit the loop, try to insert
978 every value on the value chain. That's
979 because we will be removing all the
980 watches below, and removing a
981 watchpoint we didn't insert could have
989 /* Failure to insert a watchpoint on any memory value in the
990 value chain brings us here. */
993 remove_breakpoint (bpt
, mark_uninserted
);
994 *hw_breakpoint_error
= 1;
995 fprintf_unfiltered (tmp_error_stream
,
996 "Could not insert hardware watchpoint %d.\n",
1003 printf_filtered ("Hardware watchpoint %d deleted ", bpt
->owner
->number
);
1004 printf_filtered ("because the program has left the block \n");
1005 printf_filtered ("in which its expression is valid.\n");
1006 if (bpt
->owner
->related_breakpoint
)
1007 bpt
->owner
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1008 bpt
->owner
->disposition
= disp_del_at_next_stop
;
1011 /* Restore the selected frame. */
1012 select_frame (frame_find_by_id (saved_frame_id
));
1017 else if (ep_is_exception_catchpoint (bpt
->owner
))
1019 /* FIXME drow/2003-09-09: This code sets both a catchpoint and a
1020 breakpoint. Once again, it would be better if this was represented
1021 as two bp_locations. */
1023 /* If we get here, we must have a callback mechanism for exception
1024 events -- with g++ style embedded label support, we insert
1025 ordinary breakpoints and not catchpoints. */
1026 val
= target_insert_breakpoint (bpt
->address
, bpt
->shadow_contents
);
1029 /* Couldn't set breakpoint for some reason */
1030 fprintf_unfiltered (tmp_error_stream
,
1031 "Cannot insert catchpoint %d; disabling it.\n",
1032 bpt
->owner
->number
);
1033 fprintf_filtered (tmp_error_stream
,
1034 "Error accessing memory address ");
1035 print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
1036 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1037 safe_strerror (val
));
1038 bpt
->owner
->enable_state
= bp_disabled
;
1042 /* Bp set, now make sure callbacks are enabled */
1043 /* Format possible error msg */
1044 char *message
= xstrprintf ("Error inserting catchpoint %d:\n",
1045 bpt
->owner
->number
);
1046 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
1048 args_for_catchpoint_enable args
;
1049 args
.kind
= bpt
->owner
->type
== bp_catch_catch
?
1050 EX_EVENT_CATCH
: EX_EVENT_THROW
;
1052 val
= catch_errors (cover_target_enable_exception_callback
,
1053 &args
, message
, RETURN_MASK_ALL
);
1054 do_cleanups (cleanups
);
1055 if (val
!= 0 && val
!= -1)
1058 /* Check if something went wrong; val == 0 can be ignored */
1061 /* something went wrong */
1062 fprintf_unfiltered (tmp_error_stream
,
1063 "Cannot insert catchpoint %d; disabling it.\n",
1064 bpt
->owner
->number
);
1065 bpt
->owner
->enable_state
= bp_disabled
;
1072 else if (bpt
->owner
->type
== bp_catch_fork
1073 || bpt
->owner
->type
== bp_catch_vfork
1074 || bpt
->owner
->type
== bp_catch_exec
)
1076 char *prefix
= xstrprintf ("warning: inserting catchpoint %d: ",
1077 bpt
->owner
->number
);
1078 struct cleanup
*cleanups
= make_cleanup (xfree
, prefix
);
1079 val
= catch_exceptions (uiout
, insert_catchpoint
, bpt
->owner
, prefix
,
1081 do_cleanups (cleanups
);
1083 bpt
->owner
->enable_state
= bp_disabled
;
1087 /* We've already printed an error message if there was a problem
1088 inserting this catchpoint, and we've disabled the catchpoint,
1089 so just return success. */
1096 /* insert_breakpoints is used when starting or continuing the program.
1097 remove_breakpoints is used when the program stops.
1098 Both return zero if successful,
1099 or an `errno' value if could not write the inferior. */
1102 insert_breakpoints (void)
1104 struct bp_location
*b
, *temp
;
1105 int return_val
= 0; /* return success code. */
1107 int disabled_breaks
= 0;
1108 int hw_breakpoint_error
= 0;
1109 int process_warning
= 0;
1111 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1112 make_cleanup_ui_file_delete (tmp_error_stream
);
1114 /* Explicitly mark the warning -- this will only be printed if
1115 there was an error. */
1116 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1118 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1120 /* Permanent breakpoints cannot be inserted or removed. Disabled
1121 breakpoints should not be inserted. */
1122 if (!breakpoint_enabled (b
->owner
))
1125 /* FIXME drow/2003-10-07: This code should be pushed elsewhere when
1126 hardware watchpoints are split into multiple loc breakpoints. */
1127 if ((b
->loc_type
== bp_loc_hardware_watchpoint
1128 || b
->owner
->type
== bp_watchpoint
) && !b
->owner
->val
)
1131 val
= evaluate_expression (b
->owner
->exp
);
1132 release_value (val
);
1133 if (VALUE_LAZY (val
))
1134 value_fetch_lazy (val
);
1135 b
->owner
->val
= val
;
1138 val
= insert_bp_location (b
, tmp_error_stream
,
1139 &disabled_breaks
, &process_warning
,
1140 &hw_breakpoint_error
);
1147 /* If a hardware breakpoint or watchpoint was inserted, add a
1148 message about possibly exhausted resources. */
1149 if (hw_breakpoint_error
)
1151 fprintf_unfiltered (tmp_error_stream
,
1152 "Could not insert hardware breakpoints:\n\
1153 You may have requested too many hardware breakpoints/watchpoints.\n");
1155 #ifdef ONE_PROCESS_WRITETEXT
1156 if (process_warning
)
1157 fprintf_unfiltered (tmp_error_stream
,
1158 "The same program may be running in another process.");
1160 target_terminal_ours_for_output ();
1161 error_stream (tmp_error_stream
);
1167 remove_breakpoints (void)
1169 struct bp_location
*b
;
1172 ALL_BP_LOCATIONS (b
)
1176 val
= remove_breakpoint (b
, mark_uninserted
);
1185 remove_hw_watchpoints (void)
1187 struct bp_location
*b
;
1190 ALL_BP_LOCATIONS (b
)
1192 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1194 val
= remove_breakpoint (b
, mark_uninserted
);
1203 reattach_breakpoints (int pid
)
1205 struct bp_location
*b
;
1207 struct cleanup
*old_chain
= save_inferior_ptid ();
1209 /* Set inferior_ptid; remove_breakpoint uses this global. */
1210 inferior_ptid
= pid_to_ptid (pid
);
1211 ALL_BP_LOCATIONS (b
)
1215 remove_breakpoint (b
, mark_inserted
);
1216 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1217 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
1219 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
1220 /* FIXME drow/2003-10-07: This doesn't handle any other kinds of
1221 breakpoints. It's wrong for watchpoints, for example. */
1224 do_cleanups (old_chain
);
1229 do_cleanups (old_chain
);
1234 update_breakpoints_after_exec (void)
1236 struct breakpoint
*b
;
1237 struct breakpoint
*temp
;
1239 /* Doing this first prevents the badness of having delete_breakpoint()
1240 write a breakpoint's current "shadow contents" to lift the bp. That
1241 shadow is NOT valid after an exec()! */
1242 mark_breakpoints_out ();
1244 ALL_BREAKPOINTS_SAFE (b
, temp
)
1246 /* Solib breakpoints must be explicitly reset after an exec(). */
1247 if (b
->type
== bp_shlib_event
)
1249 delete_breakpoint (b
);
1253 /* Thread event breakpoints must be set anew after an exec(),
1254 as must overlay event breakpoints. */
1255 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1257 delete_breakpoint (b
);
1261 /* Step-resume breakpoints are meaningless after an exec(). */
1262 if (b
->type
== bp_step_resume
)
1264 delete_breakpoint (b
);
1268 /* Ditto the sigtramp handler breakpoints. */
1269 if (b
->type
== bp_through_sigtramp
)
1271 delete_breakpoint (b
);
1275 /* Ditto the exception-handling catchpoints. */
1276 if ((b
->type
== bp_catch_catch
) || (b
->type
== bp_catch_throw
))
1278 delete_breakpoint (b
);
1282 /* Don't delete an exec catchpoint, because else the inferior
1283 won't stop when it ought!
1285 Similarly, we probably ought to keep vfork catchpoints, 'cause
1286 on this target, we may not be able to stop when the vfork is
1287 seen, but only when the subsequent exec is seen. (And because
1288 deleting fork catchpoints here but not vfork catchpoints will
1289 seem mysterious to users, keep those too.)
1291 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1292 target address field, if any, is sufficient to have it be reset
1293 automagically. Certainly on HP-UX that's true.
1295 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1296 valid code address on some platforms (like the mn10300
1297 simulators). We shouldn't assign any special interpretation to
1298 a breakpoint with a zero address. And in fact, GDB doesn't ---
1299 I can't see what that comment above is talking about. As far
1300 as I can tell, setting the address of a
1301 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1302 is meaningless, since those are implemented with HP-UX kernel
1303 hackery, not by storing breakpoint instructions somewhere. */
1304 if ((b
->type
== bp_catch_exec
) ||
1305 (b
->type
== bp_catch_vfork
) ||
1306 (b
->type
== bp_catch_fork
))
1308 b
->loc
->address
= (CORE_ADDR
) NULL
;
1312 /* bp_finish is a special case. The only way we ought to be able
1313 to see one of these when an exec() has happened, is if the user
1314 caught a vfork, and then said "finish". Ordinarily a finish just
1315 carries them to the call-site of the current callee, by setting
1316 a temporary bp there and resuming. But in this case, the finish
1317 will carry them entirely through the vfork & exec.
1319 We don't want to allow a bp_finish to remain inserted now. But
1320 we can't safely delete it, 'cause finish_command has a handle to
1321 the bp on a bpstat, and will later want to delete it. There's a
1322 chance (and I've seen it happen) that if we delete the bp_finish
1323 here, that its storage will get reused by the time finish_command
1324 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1325 We really must allow finish_command to delete a bp_finish.
1327 In the absense of a general solution for the "how do we know
1328 it's safe to delete something others may have handles to?"
1329 problem, what we'll do here is just uninsert the bp_finish, and
1330 let finish_command delete it.
1332 (We know the bp_finish is "doomed" in the sense that it's
1333 momentary, and will be deleted as soon as finish_command sees
1334 the inferior stopped. So it doesn't matter that the bp's
1335 address is probably bogus in the new a.out, unlike e.g., the
1336 solib breakpoints.) */
1338 if (b
->type
== bp_finish
)
1343 /* Without a symbolic address, we have little hope of the
1344 pre-exec() address meaning the same thing in the post-exec()
1346 if (b
->addr_string
== NULL
)
1348 delete_breakpoint (b
);
1352 /* If this breakpoint has survived the above battery of checks, then
1353 it must have a symbolic address. Be sure that it gets reevaluated
1354 to a target address, rather than reusing the old evaluation.
1356 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1357 for bp_catch_exec and friends, I'm pretty sure this is entirely
1358 unnecessary. A call to breakpoint_re_set_one always recomputes
1359 the breakpoint's address from scratch, or deletes it if it can't.
1360 So I think this assignment could be deleted without effect. */
1361 b
->loc
->address
= (CORE_ADDR
) NULL
;
1363 /* FIXME what about longjmp breakpoints? Re-create them here? */
1364 create_overlay_event_breakpoint ("_ovly_debug_event");
1368 detach_breakpoints (int pid
)
1370 struct bp_location
*b
;
1372 struct cleanup
*old_chain
= save_inferior_ptid ();
1374 if (pid
== PIDGET (inferior_ptid
))
1375 error ("Cannot detach breakpoints of inferior_ptid");
1377 /* Set inferior_ptid; remove_breakpoint uses this global. */
1378 inferior_ptid
= pid_to_ptid (pid
);
1379 ALL_BP_LOCATIONS (b
)
1383 val
= remove_breakpoint (b
, mark_inserted
);
1386 do_cleanups (old_chain
);
1391 do_cleanups (old_chain
);
1396 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1400 if (b
->owner
->enable_state
== bp_permanent
)
1401 /* Permanent breakpoints cannot be inserted or removed. */
1404 if (b
->owner
->type
== bp_none
)
1405 warning ("attempted to remove apparently deleted breakpoint #%d?",
1408 if (b
->loc_type
== bp_loc_software_breakpoint
1409 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1411 /* "Normal" instruction breakpoint: either the standard
1412 trap-instruction bp (bp_breakpoint), or a
1413 bp_hardware_breakpoint. */
1415 /* First check to see if we have to handle an overlay. */
1416 if (overlay_debugging
== ovly_off
1417 || b
->section
== NULL
1418 || !(section_is_overlay (b
->section
)))
1420 /* No overlay handling: just remove the breakpoint. */
1422 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1423 val
= target_remove_hw_breakpoint (b
->address
,
1424 b
->shadow_contents
);
1426 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1430 /* This breakpoint is in an overlay section.
1431 Did we set a breakpoint at the LMA? */
1432 if (!overlay_events_enabled
)
1434 /* Yes -- overlay event support is not active, so we
1435 should have set a breakpoint at the LMA. Remove it.
1437 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
1439 /* Ignore any failures: if the LMA is in ROM, we will
1440 have already warned when we failed to insert it. */
1441 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1442 target_remove_hw_breakpoint (addr
, b
->shadow_contents
);
1444 target_remove_breakpoint (addr
, b
->shadow_contents
);
1446 /* Did we set a breakpoint at the VMA?
1447 If so, we will have marked the breakpoint 'inserted'. */
1450 /* Yes -- remove it. Previously we did not bother to
1451 remove the breakpoint if the section had been
1452 unmapped, but let's not rely on that being safe. We
1453 don't know what the overlay manager might do. */
1454 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1455 val
= target_remove_hw_breakpoint (b
->address
,
1456 b
->shadow_contents
);
1458 val
= target_remove_breakpoint (b
->address
,
1459 b
->shadow_contents
);
1463 /* No -- not inserted, so no need to remove. No error. */
1469 b
->inserted
= (is
== mark_inserted
);
1471 else if (b
->loc_type
== bp_loc_hardware_watchpoint
1472 && breakpoint_enabled (b
->owner
)
1478 b
->inserted
= (is
== mark_inserted
);
1479 /* Walk down the saved value chain. */
1480 for (v
= b
->owner
->val_chain
; v
; v
= v
->next
)
1482 /* For each memory reference remove the watchpoint
1484 if (VALUE_LVAL (v
) == lval_memory
1485 && ! VALUE_LAZY (v
))
1487 struct type
*vtype
= check_typedef (value_type (v
));
1489 if (v
== b
->owner
->val_chain
1490 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1491 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1496 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
1497 len
= TYPE_LENGTH (value_type (v
));
1499 if (b
->owner
->type
== bp_read_watchpoint
)
1501 else if (b
->owner
->type
== bp_access_watchpoint
)
1504 val
= target_remove_watchpoint (addr
, len
, type
);
1511 /* Failure to remove any of the hardware watchpoints comes here. */
1512 if ((is
== mark_uninserted
) && (b
->inserted
))
1513 warning ("Could not remove hardware watchpoint %d.",
1516 else if ((b
->owner
->type
== bp_catch_fork
||
1517 b
->owner
->type
== bp_catch_vfork
||
1518 b
->owner
->type
== bp_catch_exec
)
1519 && breakpoint_enabled (b
->owner
)
1523 switch (b
->owner
->type
)
1526 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1528 case bp_catch_vfork
:
1529 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1532 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1535 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1540 b
->inserted
= (is
== mark_inserted
);
1542 else if ((b
->owner
->type
== bp_catch_catch
||
1543 b
->owner
->type
== bp_catch_throw
)
1544 && breakpoint_enabled (b
->owner
)
1548 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1551 b
->inserted
= (is
== mark_inserted
);
1553 else if (ep_is_exception_catchpoint (b
->owner
)
1554 && b
->inserted
/* sometimes previous insert doesn't happen */
1555 && breakpoint_enabled (b
->owner
)
1559 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1563 b
->inserted
= (is
== mark_inserted
);
1569 /* Clear the "inserted" flag in all breakpoints. */
1572 mark_breakpoints_out (void)
1574 struct bp_location
*bpt
;
1576 ALL_BP_LOCATIONS (bpt
)
1580 /* Clear the "inserted" flag in all breakpoints and delete any
1581 breakpoints which should go away between runs of the program.
1583 Plus other such housekeeping that has to be done for breakpoints
1586 Note: this function gets called at the end of a run (by
1587 generic_mourn_inferior) and when a run begins (by
1588 init_wait_for_inferior). */
1593 breakpoint_init_inferior (enum inf_context context
)
1595 struct breakpoint
*b
, *temp
;
1596 struct bp_location
*bpt
;
1597 static int warning_needed
= 0;
1599 ALL_BP_LOCATIONS (bpt
)
1602 ALL_BREAKPOINTS_SAFE (b
, temp
)
1607 case bp_watchpoint_scope
:
1609 /* If the call dummy breakpoint is at the entry point it will
1610 cause problems when the inferior is rerun, so we better
1613 Also get rid of scope breakpoints. */
1614 delete_breakpoint (b
);
1618 case bp_hardware_watchpoint
:
1619 case bp_read_watchpoint
:
1620 case bp_access_watchpoint
:
1622 /* Likewise for watchpoints on local expressions. */
1623 if (b
->exp_valid_block
!= NULL
)
1624 delete_breakpoint (b
);
1625 if (context
== inf_starting
)
1627 /* Reset val field to force reread of starting value
1628 in insert_breakpoints. */
1630 value_free (b
->val
);
1635 /* Likewise for exception catchpoints in dynamic-linked
1636 executables where required */
1637 if (ep_is_exception_catchpoint (b
)
1638 && deprecated_exception_catchpoints_are_fragile
)
1641 delete_breakpoint (b
);
1647 if (deprecated_exception_catchpoints_are_fragile
)
1648 deprecated_exception_support_initialized
= 0;
1650 /* Don't issue the warning unless it's really needed... */
1651 if (warning_needed
&& (context
!= inf_exited
))
1653 warning ("Exception catchpoints from last run were deleted.");
1654 warning ("You must reinsert them explicitly.");
1659 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1660 exists at PC. It returns ordinary_breakpoint_here if it's an
1661 ordinary breakpoint, or permanent_breakpoint_here if it's a
1662 permanent breakpoint.
1663 - When continuing from a location with an ordinary breakpoint, we
1664 actually single step once before calling insert_breakpoints.
1665 - When continuing from a localion with a permanent breakpoint, we
1666 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1667 the target, to advance the PC past the breakpoint. */
1669 enum breakpoint_here
1670 breakpoint_here_p (CORE_ADDR pc
)
1672 struct bp_location
*bpt
;
1673 int any_breakpoint_here
= 0;
1675 ALL_BP_LOCATIONS (bpt
)
1677 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1678 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1681 if ((breakpoint_enabled (bpt
->owner
)
1682 || bpt
->owner
->enable_state
== bp_permanent
)
1683 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1685 if (overlay_debugging
1686 && section_is_overlay (bpt
->section
)
1687 && !section_is_mapped (bpt
->section
))
1688 continue; /* unmapped overlay -- can't be a match */
1689 else if (bpt
->owner
->enable_state
== bp_permanent
)
1690 return permanent_breakpoint_here
;
1692 any_breakpoint_here
= 1;
1696 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1700 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1701 but it only returns true if there is actually a breakpoint inserted
1705 breakpoint_inserted_here_p (CORE_ADDR pc
)
1707 struct bp_location
*bpt
;
1709 ALL_BP_LOCATIONS (bpt
)
1711 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1712 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1716 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1718 if (overlay_debugging
1719 && section_is_overlay (bpt
->section
)
1720 && !section_is_mapped (bpt
->section
))
1721 continue; /* unmapped overlay -- can't be a match */
1730 /* This function returns non-zero iff there is a software breakpoint
1734 software_breakpoint_inserted_here_p (CORE_ADDR pc
)
1736 struct bp_location
*bpt
;
1737 int any_breakpoint_here
= 0;
1739 ALL_BP_LOCATIONS (bpt
)
1741 if (bpt
->loc_type
!= bp_loc_software_breakpoint
)
1744 if ((breakpoint_enabled (bpt
->owner
)
1745 || bpt
->owner
->enable_state
== bp_permanent
)
1747 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1749 if (overlay_debugging
1750 && section_is_overlay (bpt
->section
)
1751 && !section_is_mapped (bpt
->section
))
1752 continue; /* unmapped overlay -- can't be a match */
1761 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1762 PC is valid for process/thread PTID. */
1765 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1767 struct bp_location
*bpt
;
1770 thread
= pid_to_thread_id (ptid
);
1772 ALL_BP_LOCATIONS (bpt
)
1774 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1775 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1778 if ((breakpoint_enabled (bpt
->owner
)
1779 || bpt
->owner
->enable_state
== bp_permanent
)
1780 && bpt
->address
== pc
1781 && (bpt
->owner
->thread
== -1 || bpt
->owner
->thread
== thread
))
1783 if (overlay_debugging
1784 && section_is_overlay (bpt
->section
)
1785 && !section_is_mapped (bpt
->section
))
1786 continue; /* unmapped overlay -- can't be a match */
1796 /* bpstat stuff. External routines' interfaces are documented
1800 ep_is_catchpoint (struct breakpoint
*ep
)
1803 (ep
->type
== bp_catch_load
)
1804 || (ep
->type
== bp_catch_unload
)
1805 || (ep
->type
== bp_catch_fork
)
1806 || (ep
->type
== bp_catch_vfork
)
1807 || (ep
->type
== bp_catch_exec
)
1808 || (ep
->type
== bp_catch_catch
)
1809 || (ep
->type
== bp_catch_throw
);
1811 /* ??rehrauer: Add more kinds here, as are implemented... */
1815 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1818 (ep
->type
== bp_catch_load
)
1819 || (ep
->type
== bp_catch_unload
);
1823 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1826 (ep
->type
== bp_catch_catch
)
1827 || (ep
->type
== bp_catch_throw
);
1830 /* Clear a bpstat so that it says we are not at any breakpoint.
1831 Also free any storage that is part of a bpstat. */
1834 bpstat_clear (bpstat
*bsp
)
1845 if (p
->old_val
!= NULL
)
1846 value_free (p
->old_val
);
1847 free_command_lines (&p
->commands
);
1854 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1855 is part of the bpstat is copied as well. */
1858 bpstat_copy (bpstat bs
)
1862 bpstat retval
= NULL
;
1867 for (; bs
!= NULL
; bs
= bs
->next
)
1869 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1870 memcpy (tmp
, bs
, sizeof (*tmp
));
1871 if (bs
->commands
!= NULL
)
1872 tmp
->commands
= copy_command_lines (bs
->commands
);
1873 if (bs
->old_val
!= NULL
)
1874 tmp
->old_val
= value_copy (bs
->old_val
);
1877 /* This is the first thing in the chain. */
1887 /* Find the bpstat associated with this breakpoint */
1890 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1895 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1897 if (bsp
->breakpoint_at
== breakpoint
)
1903 /* Find a step_resume breakpoint associated with this bpstat.
1904 (If there are multiple step_resume bp's on the list, this function
1905 will arbitrarily pick one.)
1907 It is an error to use this function if BPSTAT doesn't contain a
1908 step_resume breakpoint.
1910 See wait_for_inferior's use of this function. */
1912 bpstat_find_step_resume_breakpoint (bpstat bsp
)
1917 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1919 current_thread
= pid_to_thread_id (inferior_ptid
);
1921 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1923 if ((bsp
->breakpoint_at
!= NULL
) &&
1924 (bsp
->breakpoint_at
->type
== bp_step_resume
) &&
1925 (bsp
->breakpoint_at
->thread
== current_thread
||
1926 bsp
->breakpoint_at
->thread
== -1))
1927 return bsp
->breakpoint_at
;
1930 error ("Internal error (no step_resume breakpoint found)");
1934 /* Return the breakpoint number of the first breakpoint we are stopped
1935 at. *BSP upon return is a bpstat which points to the remaining
1936 breakpoints stopped at (but which is not guaranteed to be good for
1937 anything but further calls to bpstat_num).
1938 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1941 bpstat_num (bpstat
*bsp
)
1943 struct breakpoint
*b
;
1946 return 0; /* No more breakpoint values */
1949 b
= (*bsp
)->breakpoint_at
;
1950 *bsp
= (*bsp
)->next
;
1952 return -1; /* breakpoint that's been deleted since */
1954 return b
->number
; /* We have its number */
1958 /* Modify BS so that the actions will not be performed. */
1961 bpstat_clear_actions (bpstat bs
)
1963 for (; bs
!= NULL
; bs
= bs
->next
)
1965 free_command_lines (&bs
->commands
);
1966 if (bs
->old_val
!= NULL
)
1968 value_free (bs
->old_val
);
1974 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1976 cleanup_executing_breakpoints (void *ignore
)
1978 executing_breakpoint_commands
= 0;
1981 /* Execute all the commands associated with all the breakpoints at this
1982 location. Any of these commands could cause the process to proceed
1983 beyond this point, etc. We look out for such changes by checking
1984 the global "breakpoint_proceeded" after each command. */
1987 bpstat_do_actions (bpstat
*bsp
)
1990 struct cleanup
*old_chain
;
1992 /* Avoid endless recursion if a `source' command is contained
1994 if (executing_breakpoint_commands
)
1997 executing_breakpoint_commands
= 1;
1998 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
2001 /* Note that (as of this writing), our callers all appear to
2002 be passing us the address of global stop_bpstat. And, if
2003 our calls to execute_control_command cause the inferior to
2004 proceed, that global (and hence, *bsp) will change.
2006 We must be careful to not touch *bsp unless the inferior
2007 has not proceeded. */
2009 /* This pointer will iterate over the list of bpstat's. */
2012 breakpoint_proceeded
= 0;
2013 for (; bs
!= NULL
; bs
= bs
->next
)
2015 struct command_line
*cmd
;
2016 struct cleanup
*this_cmd_tree_chain
;
2018 /* Take ownership of the BSP's command tree, if it has one.
2020 The command tree could legitimately contain commands like
2021 'step' and 'next', which call clear_proceed_status, which
2022 frees stop_bpstat's command tree. To make sure this doesn't
2023 free the tree we're executing out from under us, we need to
2024 take ownership of the tree ourselves. Since a given bpstat's
2025 commands are only executed once, we don't need to copy it; we
2026 can clear the pointer in the bpstat, and make sure we free
2027 the tree when we're done. */
2030 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2034 execute_control_command (cmd
);
2036 if (breakpoint_proceeded
)
2042 /* We can free this command tree now. */
2043 do_cleanups (this_cmd_tree_chain
);
2045 if (breakpoint_proceeded
)
2046 /* The inferior is proceeded by the command; bomb out now.
2047 The bpstat chain has been blown away by wait_for_inferior.
2048 But since execution has stopped again, there is a new bpstat
2049 to look at, so start over. */
2052 do_cleanups (old_chain
);
2055 /* This is the normal print function for a bpstat. In the future,
2056 much of this logic could (should?) be moved to bpstat_stop_status,
2057 by having it set different print_it values.
2059 Current scheme: When we stop, bpstat_print() is called. It loops
2060 through the bpstat list of things causing this stop, calling the
2061 print_bp_stop_message function on each one. The behavior of the
2062 print_bp_stop_message function depends on the print_it field of
2063 bpstat. If such field so indicates, call this function here.
2065 Return values from this routine (ultimately used by bpstat_print()
2066 and normal_stop() to decide what to do):
2067 PRINT_NOTHING: Means we already printed all we needed to print,
2068 don't print anything else.
2069 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2070 that something to be followed by a location.
2071 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2072 that something to be followed by a location.
2073 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2076 static enum print_stop_action
2077 print_it_typical (bpstat bs
)
2079 struct cleanup
*old_chain
, *ui_out_chain
;
2080 struct ui_stream
*stb
;
2081 stb
= ui_out_stream_new (uiout
);
2082 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2083 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2084 which has since been deleted. */
2085 if (bs
->breakpoint_at
== NULL
)
2086 return PRINT_UNKNOWN
;
2088 switch (bs
->breakpoint_at
->type
)
2091 case bp_hardware_breakpoint
:
2092 if (bs
->breakpoint_at
->loc
->address
!= bs
->breakpoint_at
->loc
->requested_address
)
2093 breakpoint_adjustment_warning (bs
->breakpoint_at
->loc
->requested_address
,
2094 bs
->breakpoint_at
->loc
->address
,
2095 bs
->breakpoint_at
->number
, 1);
2096 annotate_breakpoint (bs
->breakpoint_at
->number
);
2097 ui_out_text (uiout
, "\nBreakpoint ");
2098 if (ui_out_is_mi_like_p (uiout
))
2099 ui_out_field_string (uiout
, "reason", "breakpoint-hit");
2100 ui_out_field_int (uiout
, "bkptno", bs
->breakpoint_at
->number
);
2101 ui_out_text (uiout
, ", ");
2102 return PRINT_SRC_AND_LOC
;
2105 case bp_shlib_event
:
2106 /* Did we stop because the user set the stop_on_solib_events
2107 variable? (If so, we report this as a generic, "Stopped due
2108 to shlib event" message.) */
2109 printf_filtered ("Stopped due to shared library event\n");
2110 return PRINT_NOTHING
;
2113 case bp_thread_event
:
2114 /* Not sure how we will get here.
2115 GDB should not stop for these breakpoints. */
2116 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
2117 return PRINT_NOTHING
;
2120 case bp_overlay_event
:
2121 /* By analogy with the thread event, GDB should not stop for these. */
2122 printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n");
2123 return PRINT_NOTHING
;
2127 annotate_catchpoint (bs
->breakpoint_at
->number
);
2128 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2129 printf_filtered ("loaded");
2130 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2131 return PRINT_SRC_AND_LOC
;
2134 case bp_catch_unload
:
2135 annotate_catchpoint (bs
->breakpoint_at
->number
);
2136 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2137 printf_filtered ("unloaded");
2138 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2139 return PRINT_SRC_AND_LOC
;
2143 annotate_catchpoint (bs
->breakpoint_at
->number
);
2144 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2145 printf_filtered ("forked");
2146 printf_filtered (" process %d), ",
2147 bs
->breakpoint_at
->forked_inferior_pid
);
2148 return PRINT_SRC_AND_LOC
;
2151 case bp_catch_vfork
:
2152 annotate_catchpoint (bs
->breakpoint_at
->number
);
2153 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2154 printf_filtered ("vforked");
2155 printf_filtered (" process %d), ",
2156 bs
->breakpoint_at
->forked_inferior_pid
);
2157 return PRINT_SRC_AND_LOC
;
2161 annotate_catchpoint (bs
->breakpoint_at
->number
);
2162 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
2163 bs
->breakpoint_at
->number
,
2164 bs
->breakpoint_at
->exec_pathname
);
2165 return PRINT_SRC_AND_LOC
;
2168 case bp_catch_catch
:
2169 if (current_exception_event
&&
2170 (CURRENT_EXCEPTION_KIND
== EX_EVENT_CATCH
))
2172 annotate_catchpoint (bs
->breakpoint_at
->number
);
2173 printf_filtered ("\nCatchpoint %d (exception caught), ",
2174 bs
->breakpoint_at
->number
);
2175 printf_filtered ("throw location ");
2176 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2177 printf_filtered ("%s:%d",
2178 CURRENT_EXCEPTION_THROW_FILE
,
2179 CURRENT_EXCEPTION_THROW_LINE
);
2181 printf_filtered ("unknown");
2183 printf_filtered (", catch location ");
2184 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2185 printf_filtered ("%s:%d",
2186 CURRENT_EXCEPTION_CATCH_FILE
,
2187 CURRENT_EXCEPTION_CATCH_LINE
);
2189 printf_filtered ("unknown");
2191 printf_filtered ("\n");
2192 /* don't bother to print location frame info */
2193 return PRINT_SRC_ONLY
;
2197 /* really throw, some other bpstat will handle it */
2198 return PRINT_UNKNOWN
;
2202 case bp_catch_throw
:
2203 if (current_exception_event
&&
2204 (CURRENT_EXCEPTION_KIND
== EX_EVENT_THROW
))
2206 annotate_catchpoint (bs
->breakpoint_at
->number
);
2207 printf_filtered ("\nCatchpoint %d (exception thrown), ",
2208 bs
->breakpoint_at
->number
);
2209 printf_filtered ("throw location ");
2210 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2211 printf_filtered ("%s:%d",
2212 CURRENT_EXCEPTION_THROW_FILE
,
2213 CURRENT_EXCEPTION_THROW_LINE
);
2215 printf_filtered ("unknown");
2217 printf_filtered (", catch location ");
2218 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2219 printf_filtered ("%s:%d",
2220 CURRENT_EXCEPTION_CATCH_FILE
,
2221 CURRENT_EXCEPTION_CATCH_LINE
);
2223 printf_filtered ("unknown");
2225 printf_filtered ("\n");
2226 /* don't bother to print location frame info */
2227 return PRINT_SRC_ONLY
;
2231 /* really catch, some other bpstat will handle it */
2232 return PRINT_UNKNOWN
;
2237 case bp_hardware_watchpoint
:
2238 if (bs
->old_val
!= NULL
)
2240 annotate_watchpoint (bs
->breakpoint_at
->number
);
2241 if (ui_out_is_mi_like_p (uiout
))
2242 ui_out_field_string (uiout
, "reason", "watchpoint-trigger");
2243 mention (bs
->breakpoint_at
);
2244 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2245 ui_out_text (uiout
, "\nOld value = ");
2246 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2247 ui_out_field_stream (uiout
, "old", stb
);
2248 ui_out_text (uiout
, "\nNew value = ");
2249 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2250 ui_out_field_stream (uiout
, "new", stb
);
2251 do_cleanups (ui_out_chain
);
2252 ui_out_text (uiout
, "\n");
2253 value_free (bs
->old_val
);
2256 /* More than one watchpoint may have been triggered. */
2257 return PRINT_UNKNOWN
;
2260 case bp_read_watchpoint
:
2261 if (ui_out_is_mi_like_p (uiout
))
2262 ui_out_field_string (uiout
, "reason", "read-watchpoint-trigger");
2263 mention (bs
->breakpoint_at
);
2264 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2265 ui_out_text (uiout
, "\nValue = ");
2266 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2267 ui_out_field_stream (uiout
, "value", stb
);
2268 do_cleanups (ui_out_chain
);
2269 ui_out_text (uiout
, "\n");
2270 return PRINT_UNKNOWN
;
2273 case bp_access_watchpoint
:
2274 if (bs
->old_val
!= NULL
)
2276 annotate_watchpoint (bs
->breakpoint_at
->number
);
2277 if (ui_out_is_mi_like_p (uiout
))
2278 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2279 mention (bs
->breakpoint_at
);
2280 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2281 ui_out_text (uiout
, "\nOld value = ");
2282 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2283 ui_out_field_stream (uiout
, "old", stb
);
2284 value_free (bs
->old_val
);
2286 ui_out_text (uiout
, "\nNew value = ");
2290 mention (bs
->breakpoint_at
);
2291 if (ui_out_is_mi_like_p (uiout
))
2292 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2293 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2294 ui_out_text (uiout
, "\nValue = ");
2296 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0,Val_pretty_default
);
2297 ui_out_field_stream (uiout
, "new", stb
);
2298 do_cleanups (ui_out_chain
);
2299 ui_out_text (uiout
, "\n");
2300 return PRINT_UNKNOWN
;
2303 /* Fall through, we don't deal with these types of breakpoints
2307 if (ui_out_is_mi_like_p (uiout
))
2308 ui_out_field_string (uiout
, "reason", "function-finished");
2309 return PRINT_UNKNOWN
;
2313 if (ui_out_is_mi_like_p (uiout
))
2314 ui_out_field_string (uiout
, "reason", "location-reached");
2315 return PRINT_UNKNOWN
;
2320 case bp_longjmp_resume
:
2321 case bp_step_resume
:
2322 case bp_through_sigtramp
:
2323 case bp_watchpoint_scope
:
2326 return PRINT_UNKNOWN
;
2330 /* Generic routine for printing messages indicating why we
2331 stopped. The behavior of this function depends on the value
2332 'print_it' in the bpstat structure. Under some circumstances we
2333 may decide not to print anything here and delegate the task to
2336 static enum print_stop_action
2337 print_bp_stop_message (bpstat bs
)
2339 switch (bs
->print_it
)
2342 /* Nothing should be printed for this bpstat entry. */
2343 return PRINT_UNKNOWN
;
2347 /* We still want to print the frame, but we already printed the
2348 relevant messages. */
2349 return PRINT_SRC_AND_LOC
;
2352 case print_it_normal
:
2353 /* Normal case. Call the breakpoint's print_it method, or
2354 print_it_typical. */
2355 if (bs
->breakpoint_at
!= NULL
&& bs
->breakpoint_at
->ops
!= NULL
2356 && bs
->breakpoint_at
->ops
->print_it
!= NULL
)
2357 return bs
->breakpoint_at
->ops
->print_it (bs
->breakpoint_at
);
2359 return print_it_typical (bs
);
2363 internal_error (__FILE__
, __LINE__
,
2364 "print_bp_stop_message: unrecognized enum value");
2369 /* Print a message indicating what happened. This is called from
2370 normal_stop(). The input to this routine is the head of the bpstat
2371 list - a list of the eventpoints that caused this stop. This
2372 routine calls the generic print routine for printing a message
2373 about reasons for stopping. This will print (for example) the
2374 "Breakpoint n," part of the output. The return value of this
2377 PRINT_UNKNOWN: Means we printed nothing
2378 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2379 code to print the location. An example is
2380 "Breakpoint 1, " which should be followed by
2382 PRINT_SRC_ONLY: Means we printed something, but there is no need
2383 to also print the location part of the message.
2384 An example is the catch/throw messages, which
2385 don't require a location appended to the end.
2386 PRINT_NOTHING: We have done some printing and we don't need any
2387 further info to be printed.*/
2389 enum print_stop_action
2390 bpstat_print (bpstat bs
)
2394 /* Maybe another breakpoint in the chain caused us to stop.
2395 (Currently all watchpoints go on the bpstat whether hit or not.
2396 That probably could (should) be changed, provided care is taken
2397 with respect to bpstat_explains_signal). */
2398 for (; bs
; bs
= bs
->next
)
2400 val
= print_bp_stop_message (bs
);
2401 if (val
== PRINT_SRC_ONLY
2402 || val
== PRINT_SRC_AND_LOC
2403 || val
== PRINT_NOTHING
)
2407 /* We reached the end of the chain, or we got a null BS to start
2408 with and nothing was printed. */
2409 return PRINT_UNKNOWN
;
2412 /* Evaluate the expression EXP and return 1 if value is zero.
2413 This is used inside a catch_errors to evaluate the breakpoint condition.
2414 The argument is a "struct expression *" that has been cast to char * to
2415 make it pass through catch_errors. */
2418 breakpoint_cond_eval (void *exp
)
2420 struct value
*mark
= value_mark ();
2421 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2422 value_free_to_mark (mark
);
2426 /* Allocate a new bpstat and chain it to the current one. */
2429 bpstat_alloc (struct breakpoint
*b
, bpstat cbs
/* Current "bs" value */ )
2433 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2435 bs
->breakpoint_at
= b
;
2436 /* If the condition is false, etc., don't do the commands. */
2437 bs
->commands
= NULL
;
2439 bs
->print_it
= print_it_normal
;
2443 /* Possible return values for watchpoint_check (this can't be an enum
2444 because of check_errors). */
2445 /* The watchpoint has been deleted. */
2446 #define WP_DELETED 1
2447 /* The value has changed. */
2448 #define WP_VALUE_CHANGED 2
2449 /* The value has not changed. */
2450 #define WP_VALUE_NOT_CHANGED 3
2452 #define BP_TEMPFLAG 1
2453 #define BP_HARDWAREFLAG 2
2455 /* Check watchpoint condition. */
2458 watchpoint_check (void *p
)
2460 bpstat bs
= (bpstat
) p
;
2461 struct breakpoint
*b
;
2462 struct frame_info
*fr
;
2463 int within_current_scope
;
2465 b
= bs
->breakpoint_at
;
2467 if (b
->exp_valid_block
== NULL
)
2468 within_current_scope
= 1;
2471 /* There is no current frame at this moment. If we're going to have
2472 any chance of handling watchpoints on local variables, we'll need
2473 the frame chain (so we can determine if we're in scope). */
2474 reinit_frame_cache ();
2475 fr
= frame_find_by_id (b
->watchpoint_frame
);
2476 within_current_scope
= (fr
!= NULL
);
2477 /* in_function_epilogue_p() returns a non-zero value if we're still
2478 in the function but the stack frame has already been invalidated.
2479 Since we can't rely on the values of local variables after the
2480 stack has been destroyed, we are treating the watchpoint in that
2481 state as `not changed' without further checking.
2483 vinschen/2003-09-04: The former implementation left out the case
2484 that the watchpoint frame couldn't be found by frame_find_by_id()
2485 because the current PC is currently in an epilogue. Calling
2486 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2487 if ((!within_current_scope
|| fr
== get_current_frame ())
2488 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2489 return WP_VALUE_NOT_CHANGED
;
2490 if (fr
&& within_current_scope
)
2491 /* If we end up stopping, the current frame will get selected
2492 in normal_stop. So this call to select_frame won't affect
2497 if (within_current_scope
)
2499 /* We use value_{,free_to_}mark because it could be a
2500 *long* time before we return to the command level and
2501 call free_all_values. We can't call free_all_values because
2502 we might be in the middle of evaluating a function call. */
2504 struct value
*mark
= value_mark ();
2505 struct value
*new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
2506 if (!value_equal (b
->val
, new_val
))
2508 release_value (new_val
);
2509 value_free_to_mark (mark
);
2510 bs
->old_val
= b
->val
;
2512 /* We will stop here */
2513 return WP_VALUE_CHANGED
;
2517 /* Nothing changed, don't do anything. */
2518 value_free_to_mark (mark
);
2519 /* We won't stop here */
2520 return WP_VALUE_NOT_CHANGED
;
2525 /* This seems like the only logical thing to do because
2526 if we temporarily ignored the watchpoint, then when
2527 we reenter the block in which it is valid it contains
2528 garbage (in the case of a function, it may have two
2529 garbage values, one before and one after the prologue).
2530 So we can't even detect the first assignment to it and
2531 watch after that (since the garbage may or may not equal
2532 the first value assigned). */
2533 /* We print all the stop information in print_it_typical(), but
2534 in this case, by the time we call print_it_typical() this bp
2535 will be deleted already. So we have no choice but print the
2536 information here. */
2537 if (ui_out_is_mi_like_p (uiout
))
2538 ui_out_field_string (uiout
, "reason", "watchpoint-scope");
2539 ui_out_text (uiout
, "\nWatchpoint ");
2540 ui_out_field_int (uiout
, "wpnum", bs
->breakpoint_at
->number
);
2541 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2542 which its expression is valid.\n");
2544 if (b
->related_breakpoint
)
2545 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2546 b
->disposition
= disp_del_at_next_stop
;
2552 /* Get a bpstat associated with having just stopped at address
2553 BP_ADDR in thread PTID. STOPPED_BY_WATCHPOINT is 1 if the
2554 target thinks we stopped due to a hardware watchpoint, 0 if we
2555 know we did not trigger a hardware watchpoint, and -1 if we do not know. */
2557 /* Determine whether we stopped at a breakpoint, etc, or whether we
2558 don't understand this stop. Result is a chain of bpstat's such that:
2560 if we don't understand the stop, the result is a null pointer.
2562 if we understand why we stopped, the result is not null.
2564 Each element of the chain refers to a particular breakpoint or
2565 watchpoint at which we have stopped. (We may have stopped for
2566 several reasons concurrently.)
2568 Each element of the chain has valid next, breakpoint_at,
2569 commands, FIXME??? fields. */
2572 bpstat_stop_status (CORE_ADDR bp_addr
, ptid_t ptid
, int stopped_by_watchpoint
)
2574 struct breakpoint
*b
, *temp
;
2575 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2576 int real_breakpoint
= 0;
2577 /* Root of the chain of bpstat's */
2578 struct bpstats root_bs
[1];
2579 /* Pointer to the last thing in the chain currently. */
2580 bpstat bs
= root_bs
;
2581 int thread_id
= pid_to_thread_id (ptid
);
2583 ALL_BREAKPOINTS_SAFE (b
, temp
)
2585 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
2588 if (b
->type
!= bp_watchpoint
2589 && b
->type
!= bp_hardware_watchpoint
2590 && b
->type
!= bp_read_watchpoint
2591 && b
->type
!= bp_access_watchpoint
2592 && b
->type
!= bp_hardware_breakpoint
2593 && b
->type
!= bp_catch_fork
2594 && b
->type
!= bp_catch_vfork
2595 && b
->type
!= bp_catch_exec
2596 && b
->type
!= bp_catch_catch
2597 && b
->type
!= bp_catch_throw
) /* a non-watchpoint bp */
2599 if (b
->loc
->address
!= bp_addr
) /* address doesn't match */
2601 if (overlay_debugging
/* unmapped overlay section */
2602 && section_is_overlay (b
->loc
->section
)
2603 && !section_is_mapped (b
->loc
->section
))
2607 /* Continuable hardware watchpoints are treated as non-existent if the
2608 reason we stopped wasn't a hardware watchpoint (we didn't stop on
2609 some data address). Otherwise gdb won't stop on a break instruction
2610 in the code (not from a breakpoint) when a hardware watchpoint has
2613 if ((b
->type
== bp_hardware_watchpoint
2614 || b
->type
== bp_read_watchpoint
2615 || b
->type
== bp_access_watchpoint
)
2616 && !stopped_by_watchpoint
)
2619 if (b
->type
== bp_hardware_breakpoint
)
2621 if (b
->loc
->address
!= bp_addr
)
2623 if (overlay_debugging
/* unmapped overlay section */
2624 && section_is_overlay (b
->loc
->section
)
2625 && !section_is_mapped (b
->loc
->section
))
2629 /* Is this a catchpoint of a load or unload? If so, did we
2630 get a load or unload of the specified library? If not,
2632 if ((b
->type
== bp_catch_load
)
2633 #if defined(SOLIB_HAVE_LOAD_EVENT)
2634 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2635 || ((b
->dll_pathname
!= NULL
)
2636 && (strcmp (b
->dll_pathname
,
2637 SOLIB_LOADED_LIBRARY_PATHNAME (
2638 PIDGET (inferior_ptid
)))
2644 if ((b
->type
== bp_catch_unload
)
2645 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2646 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2647 || ((b
->dll_pathname
!= NULL
)
2648 && (strcmp (b
->dll_pathname
,
2649 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2650 PIDGET (inferior_ptid
)))
2656 if ((b
->type
== bp_catch_fork
)
2657 && !inferior_has_forked (PIDGET (inferior_ptid
),
2658 &b
->forked_inferior_pid
))
2661 if ((b
->type
== bp_catch_vfork
)
2662 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2663 &b
->forked_inferior_pid
))
2666 if ((b
->type
== bp_catch_exec
)
2667 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2670 if (ep_is_exception_catchpoint (b
) &&
2671 !(current_exception_event
= target_get_current_exception_event ()))
2674 /* Come here if it's a watchpoint, or if the break address matches */
2676 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
2678 /* Watchpoints may change this, if not found to have triggered. */
2682 if (b
->type
== bp_watchpoint
||
2683 b
->type
== bp_hardware_watchpoint
)
2685 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2687 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2688 int e
= catch_errors (watchpoint_check
, bs
, message
,
2690 do_cleanups (cleanups
);
2694 /* We've already printed what needs to be printed. */
2695 /* Actually this is superfluous, because by the time we
2696 call print_it_typical() the wp will be already deleted,
2697 and the function will return immediately. */
2698 bs
->print_it
= print_it_done
;
2701 case WP_VALUE_CHANGED
:
2705 case WP_VALUE_NOT_CHANGED
:
2707 bs
->print_it
= print_it_noop
;
2714 /* Error from catch_errors. */
2715 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2716 if (b
->related_breakpoint
)
2717 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2718 b
->disposition
= disp_del_at_next_stop
;
2719 /* We've already printed what needs to be printed. */
2720 bs
->print_it
= print_it_done
;
2726 else if (b
->type
== bp_read_watchpoint
||
2727 b
->type
== bp_access_watchpoint
)
2733 if (!target_stopped_data_address (¤t_target
, &addr
))
2735 for (v
= b
->val_chain
; v
; v
= v
->next
)
2737 if (VALUE_LVAL (v
) == lval_memory
2738 && ! VALUE_LAZY (v
))
2740 struct type
*vtype
= check_typedef (value_type (v
));
2742 if (v
== b
->val_chain
2743 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
2744 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
2748 vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
2749 /* Exact match not required. Within range is
2751 if (addr
>= vaddr
&&
2752 addr
< vaddr
+ TYPE_LENGTH (value_type (v
)))
2759 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2761 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2762 int e
= catch_errors (watchpoint_check
, bs
, message
,
2764 do_cleanups (cleanups
);
2768 /* We've already printed what needs to be printed. */
2769 bs
->print_it
= print_it_done
;
2772 case WP_VALUE_CHANGED
:
2773 if (b
->type
== bp_read_watchpoint
)
2775 /* Don't stop: read watchpoints shouldn't fire if
2776 the value has changed. This is for targets
2777 which cannot set read-only watchpoints. */
2778 bs
->print_it
= print_it_noop
;
2784 case WP_VALUE_NOT_CHANGED
:
2791 /* Error from catch_errors. */
2792 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2793 if (b
->related_breakpoint
)
2794 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2795 b
->disposition
= disp_del_at_next_stop
;
2796 /* We've already printed what needs to be printed. */
2797 bs
->print_it
= print_it_done
;
2801 else /* found == 0 */
2803 /* This is a case where some watchpoint(s) triggered,
2804 but not at the address of this watchpoint (FOUND
2805 was left zero). So don't print anything for this
2807 bs
->print_it
= print_it_noop
;
2814 /* By definition, an encountered breakpoint is a triggered
2818 real_breakpoint
= 1;
2821 if (frame_id_p (b
->frame_id
)
2822 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2826 int value_is_zero
= 0;
2830 /* Need to select the frame, with all that implies
2831 so that the conditions will have the right context. */
2832 select_frame (get_current_frame ());
2834 = catch_errors (breakpoint_cond_eval
, (b
->cond
),
2835 "Error in testing breakpoint condition:\n",
2837 /* FIXME-someday, should give breakpoint # */
2840 if (b
->cond
&& value_is_zero
)
2843 /* Don't consider this a hit. */
2846 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
2849 /* Don't consider this a hit. */
2852 else if (b
->ignore_count
> 0)
2855 annotate_ignore_count_change ();
2860 /* We will stop here */
2861 if (b
->disposition
== disp_disable
)
2862 b
->enable_state
= bp_disabled
;
2865 bs
->commands
= b
->commands
;
2867 (strcmp ("silent", bs
->commands
->line
) == 0
2868 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
2870 bs
->commands
= bs
->commands
->next
;
2873 bs
->commands
= copy_command_lines (bs
->commands
);
2876 /* Print nothing for this entry if we dont stop or if we dont print. */
2877 if (bs
->stop
== 0 || bs
->print
== 0)
2878 bs
->print_it
= print_it_noop
;
2881 bs
->next
= NULL
; /* Terminate the chain */
2882 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2884 /* The value of a hardware watchpoint hasn't changed, but the
2885 intermediate memory locations we are watching may have. */
2886 if (bs
&& !bs
->stop
&&
2887 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2888 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2889 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2891 remove_breakpoints ();
2892 insert_breakpoints ();
2897 /* Tell what to do about this bpstat. */
2899 bpstat_what (bpstat bs
)
2901 /* Classify each bpstat as one of the following. */
2904 /* This bpstat element has no effect on the main_action. */
2907 /* There was a watchpoint, stop but don't print. */
2910 /* There was a watchpoint, stop and print. */
2913 /* There was a breakpoint but we're not stopping. */
2916 /* There was a breakpoint, stop but don't print. */
2919 /* There was a breakpoint, stop and print. */
2922 /* We hit the longjmp breakpoint. */
2925 /* We hit the longjmp_resume breakpoint. */
2928 /* We hit the step_resume breakpoint. */
2931 /* We hit the through_sigtramp breakpoint. */
2934 /* We hit the shared library event breakpoint. */
2937 /* We caught a shared library event. */
2940 /* This is just used to count how many enums there are. */
2944 /* Here is the table which drives this routine. So that we can
2945 format it pretty, we define some abbreviations for the
2946 enum bpstat_what codes. */
2947 #define kc BPSTAT_WHAT_KEEP_CHECKING
2948 #define ss BPSTAT_WHAT_STOP_SILENT
2949 #define sn BPSTAT_WHAT_STOP_NOISY
2950 #define sgl BPSTAT_WHAT_SINGLE
2951 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2952 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2953 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2954 #define sr BPSTAT_WHAT_STEP_RESUME
2955 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2956 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2957 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2959 /* "Can't happen." Might want to print an error message.
2960 abort() is not out of the question, but chances are GDB is just
2961 a bit confused, not unusable. */
2962 #define err BPSTAT_WHAT_STOP_NOISY
2964 /* Given an old action and a class, come up with a new action. */
2965 /* One interesting property of this table is that wp_silent is the same
2966 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2967 after stopping, the check for whether to step over a breakpoint
2968 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2969 reference to how we stopped. We retain separate wp_silent and
2970 bp_silent codes in case we want to change that someday.
2972 Another possibly interesting property of this table is that
2973 there's a partial ordering, priority-like, of the actions. Once
2974 you've decided that some action is appropriate, you'll never go
2975 back and decide something of a lower priority is better. The
2978 kc < clr sgl shl shlr slr sn sr ss ts
2979 sgl < clrs shl shlr slr sn sr ss ts
2980 slr < err shl shlr sn sr ss ts
2981 clr < clrs err shl shlr sn sr ss ts
2982 clrs < err shl shlr sn sr ss ts
2983 ss < shl shlr sn sr ts
2990 What I think this means is that we don't need a damned table
2991 here. If you just put the rows and columns in the right order,
2992 it'd look awfully regular. We could simply walk the bpstat list
2993 and choose the highest priority action we find, with a little
2994 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
2995 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
2996 is messy anyway). */
2998 /* step_resume entries: a step resume breakpoint overrides another
2999 breakpoint of signal handling (see comment in wait_for_inferior
3000 at where we set the step_resume breakpoint). */
3001 /* We handle the through_sigtramp_breakpoint the same way; having both
3002 one of those and a step_resume_breakpoint is probably very rare (?). */
3004 static const enum bpstat_what_main_action
3005 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3008 /* kc ss sn sgl slr clr clrs sr ts shl shlr
3011 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, ts
, shl
, shlr
},
3013 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3015 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3017 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, ts
, shl
, shlr
},
3019 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3021 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3023 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, ts
, shl
, shlr
},
3025 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, ts
, shl
, shlr
},
3027 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, ts
, shl
, shlr
},
3029 {ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, shl
, shlr
},
3031 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, shl
, ts
, shl
, shlr
},
3033 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, ts
, shlr
, shlr
}
3048 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3049 struct bpstat_what retval
;
3051 retval
.call_dummy
= 0;
3052 for (; bs
!= NULL
; bs
= bs
->next
)
3054 enum class bs_class
= no_effect
;
3055 if (bs
->breakpoint_at
== NULL
)
3056 /* I suspect this can happen if it was a momentary breakpoint
3057 which has since been deleted. */
3059 switch (bs
->breakpoint_at
->type
)
3065 case bp_hardware_breakpoint
:
3071 bs_class
= bp_noisy
;
3073 bs_class
= bp_silent
;
3076 bs_class
= bp_nostop
;
3079 case bp_hardware_watchpoint
:
3080 case bp_read_watchpoint
:
3081 case bp_access_watchpoint
:
3085 bs_class
= wp_noisy
;
3087 bs_class
= wp_silent
;
3090 /* There was a watchpoint, but we're not stopping.
3091 This requires no further action. */
3092 bs_class
= no_effect
;
3095 bs_class
= long_jump
;
3097 case bp_longjmp_resume
:
3098 bs_class
= long_resume
;
3100 case bp_step_resume
:
3103 bs_class
= step_resume
;
3106 /* It is for the wrong frame. */
3107 bs_class
= bp_nostop
;
3109 case bp_through_sigtramp
:
3110 bs_class
= through_sig
;
3112 case bp_watchpoint_scope
:
3113 bs_class
= bp_nostop
;
3115 case bp_shlib_event
:
3116 bs_class
= shlib_event
;
3118 case bp_thread_event
:
3119 case bp_overlay_event
:
3120 bs_class
= bp_nostop
;
3123 case bp_catch_unload
:
3124 /* Only if this catchpoint triggered should we cause the
3125 step-out-of-dld behaviour. Otherwise, we ignore this
3128 bs_class
= catch_shlib_event
;
3130 bs_class
= no_effect
;
3133 case bp_catch_vfork
:
3138 bs_class
= bp_noisy
;
3140 bs_class
= bp_silent
;
3143 /* There was a catchpoint, but we're not stopping.
3144 This requires no further action. */
3145 bs_class
= no_effect
;
3147 case bp_catch_catch
:
3148 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
3149 bs_class
= bp_nostop
;
3151 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3153 case bp_catch_throw
:
3154 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
3155 bs_class
= bp_nostop
;
3157 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3160 /* Make sure the action is stop (silent or noisy),
3161 so infrun.c pops the dummy frame. */
3162 bs_class
= bp_silent
;
3163 retval
.call_dummy
= 1;
3166 current_action
= table
[(int) bs_class
][(int) current_action
];
3168 retval
.main_action
= current_action
;
3172 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3173 without hardware support). This isn't related to a specific bpstat,
3174 just to things like whether watchpoints are set. */
3177 bpstat_should_step (void)
3179 struct breakpoint
*b
;
3181 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
)
3186 /* Nonzero if there are enabled hardware watchpoints. */
3188 bpstat_have_active_hw_watchpoints (void)
3190 struct bp_location
*bpt
;
3191 ALL_BP_LOCATIONS (bpt
)
3192 if (breakpoint_enabled (bpt
->owner
)
3194 && bpt
->loc_type
== bp_loc_hardware_watchpoint
)
3200 /* Given a bpstat that records zero or more triggered eventpoints, this
3201 function returns another bpstat which contains only the catchpoints
3202 on that first list, if any. */
3204 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3206 struct bpstats root_bs
[1];
3207 bpstat bs
= root_bs
;
3208 struct breakpoint
*ep
;
3211 bpstat_clear (cp_list
);
3212 root_bs
->next
= NULL
;
3214 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3216 /* Is this eventpoint a catchpoint? If not, ignore it. */
3217 ep
= ep_list
->breakpoint_at
;
3220 if ((ep
->type
!= bp_catch_load
) &&
3221 (ep
->type
!= bp_catch_unload
) &&
3222 (ep
->type
!= bp_catch_catch
) &&
3223 (ep
->type
!= bp_catch_throw
))
3224 /* pai: (temp) ADD fork/vfork here!! */
3227 /* Yes; add it to the list. */
3228 bs
= bpstat_alloc (ep
, bs
);
3233 #if defined(SOLIB_ADD)
3234 /* Also, for each triggered catchpoint, tag it with the name of
3235 the library that caused this trigger. (We copy the name now,
3236 because it's only guaranteed to be available NOW, when the
3237 catchpoint triggers. Clients who may wish to know the name
3238 later must get it from the catchpoint itself.) */
3239 if (ep
->triggered_dll_pathname
!= NULL
)
3240 xfree (ep
->triggered_dll_pathname
);
3241 if (ep
->type
== bp_catch_load
)
3242 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3243 PIDGET (inferior_ptid
));
3245 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3246 PIDGET (inferior_ptid
));
3248 dll_pathname
= NULL
;
3252 ep
->triggered_dll_pathname
= (char *)
3253 xmalloc (strlen (dll_pathname
) + 1);
3254 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3257 ep
->triggered_dll_pathname
= NULL
;
3263 /* Print B to gdb_stdout. */
3265 print_one_breakpoint (struct breakpoint
*b
,
3266 CORE_ADDR
*last_addr
)
3268 struct command_line
*l
;
3270 struct ep_type_description
3275 static struct ep_type_description bptypes
[] =
3277 {bp_none
, "?deleted?"},
3278 {bp_breakpoint
, "breakpoint"},
3279 {bp_hardware_breakpoint
, "hw breakpoint"},
3280 {bp_until
, "until"},
3281 {bp_finish
, "finish"},
3282 {bp_watchpoint
, "watchpoint"},
3283 {bp_hardware_watchpoint
, "hw watchpoint"},
3284 {bp_read_watchpoint
, "read watchpoint"},
3285 {bp_access_watchpoint
, "acc watchpoint"},
3286 {bp_longjmp
, "longjmp"},
3287 {bp_longjmp_resume
, "longjmp resume"},
3288 {bp_step_resume
, "step resume"},
3289 {bp_through_sigtramp
, "sigtramp"},
3290 {bp_watchpoint_scope
, "watchpoint scope"},
3291 {bp_call_dummy
, "call dummy"},
3292 {bp_shlib_event
, "shlib events"},
3293 {bp_thread_event
, "thread events"},
3294 {bp_overlay_event
, "overlay events"},
3295 {bp_catch_load
, "catch load"},
3296 {bp_catch_unload
, "catch unload"},
3297 {bp_catch_fork
, "catch fork"},
3298 {bp_catch_vfork
, "catch vfork"},
3299 {bp_catch_exec
, "catch exec"},
3300 {bp_catch_catch
, "catch catch"},
3301 {bp_catch_throw
, "catch throw"}
3304 static char *bpdisps
[] =
3305 {"del", "dstp", "dis", "keep"};
3306 static char bpenables
[] = "nynny";
3307 char wrap_indent
[80];
3308 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3309 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3310 struct cleanup
*bkpt_chain
;
3313 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3317 ui_out_field_int (uiout
, "number", b
->number
);
3321 if (((int) b
->type
> (sizeof (bptypes
) / sizeof (bptypes
[0])))
3322 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3323 internal_error (__FILE__
, __LINE__
,
3324 "bptypes table does not describe type #%d.",
3326 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3330 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3334 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3335 ui_out_spaces (uiout
, 2);
3338 strcpy (wrap_indent
, " ");
3341 if (TARGET_ADDR_BIT
<= 32)
3342 strcat (wrap_indent
, " ");
3344 strcat (wrap_indent
, " ");
3347 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3348 b
->ops
->print_one (b
, last_addr
);
3353 internal_error (__FILE__
, __LINE__
,
3354 "print_one_breakpoint: bp_none encountered\n");
3358 case bp_hardware_watchpoint
:
3359 case bp_read_watchpoint
:
3360 case bp_access_watchpoint
:
3361 /* Field 4, the address, is omitted (which makes the columns
3362 not line up too nicely with the headers, but the effect
3363 is relatively readable). */
3365 ui_out_field_skip (uiout
, "addr");
3367 print_expression (b
->exp
, stb
->stream
);
3368 ui_out_field_stream (uiout
, "what", stb
);
3372 case bp_catch_unload
:
3373 /* Field 4, the address, is omitted (which makes the columns
3374 not line up too nicely with the headers, but the effect
3375 is relatively readable). */
3377 ui_out_field_skip (uiout
, "addr");
3379 if (b
->dll_pathname
== NULL
)
3381 ui_out_field_string (uiout
, "what", "<any library>");
3382 ui_out_spaces (uiout
, 1);
3386 ui_out_text (uiout
, "library \"");
3387 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3388 ui_out_text (uiout
, "\" ");
3393 case bp_catch_vfork
:
3394 /* Field 4, the address, is omitted (which makes the columns
3395 not line up too nicely with the headers, but the effect
3396 is relatively readable). */
3398 ui_out_field_skip (uiout
, "addr");
3400 if (b
->forked_inferior_pid
!= 0)
3402 ui_out_text (uiout
, "process ");
3403 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3404 ui_out_spaces (uiout
, 1);
3408 /* Field 4, the address, is omitted (which makes the columns
3409 not line up too nicely with the headers, but the effect
3410 is relatively readable). */
3412 ui_out_field_skip (uiout
, "addr");
3414 if (b
->exec_pathname
!= NULL
)
3416 ui_out_text (uiout
, "program \"");
3417 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3418 ui_out_text (uiout
, "\" ");
3422 case bp_catch_catch
:
3423 /* Field 4, the address, is omitted (which makes the columns
3424 not line up too nicely with the headers, but the effect
3425 is relatively readable). */
3427 ui_out_field_skip (uiout
, "addr");
3429 ui_out_field_string (uiout
, "what", "exception catch");
3430 ui_out_spaces (uiout
, 1);
3433 case bp_catch_throw
:
3434 /* Field 4, the address, is omitted (which makes the columns
3435 not line up too nicely with the headers, but the effect
3436 is relatively readable). */
3438 ui_out_field_skip (uiout
, "addr");
3440 ui_out_field_string (uiout
, "what", "exception throw");
3441 ui_out_spaces (uiout
, 1);
3445 case bp_hardware_breakpoint
:
3449 case bp_longjmp_resume
:
3450 case bp_step_resume
:
3451 case bp_through_sigtramp
:
3452 case bp_watchpoint_scope
:
3454 case bp_shlib_event
:
3455 case bp_thread_event
:
3456 case bp_overlay_event
:
3461 ui_out_field_string (uiout
, "addr", "<PENDING>");
3463 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
3466 *last_addr
= b
->loc
->address
;
3469 sym
= find_pc_sect_function (b
->loc
->address
, b
->loc
->section
);
3472 ui_out_text (uiout
, "in ");
3473 ui_out_field_string (uiout
, "func",
3474 SYMBOL_PRINT_NAME (sym
));
3475 ui_out_wrap_hint (uiout
, wrap_indent
);
3476 ui_out_text (uiout
, " at ");
3478 ui_out_field_string (uiout
, "file", b
->source_file
);
3479 ui_out_text (uiout
, ":");
3480 ui_out_field_int (uiout
, "line", b
->line_number
);
3482 else if (b
->pending
)
3484 ui_out_field_string (uiout
, "pending", b
->addr_string
);
3488 print_address_symbolic (b
->loc
->address
, stb
->stream
, demangle
, "");
3489 ui_out_field_stream (uiout
, "at", stb
);
3494 if (b
->thread
!= -1)
3496 /* FIXME: This seems to be redundant and lost here; see the
3497 "stop only in" line a little further down. */
3498 ui_out_text (uiout
, " thread ");
3499 ui_out_field_int (uiout
, "thread", b
->thread
);
3502 ui_out_text (uiout
, "\n");
3504 if (frame_id_p (b
->frame_id
))
3507 ui_out_text (uiout
, "\tstop only in stack frame at ");
3508 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3510 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3511 ui_out_text (uiout
, "\n");
3517 ui_out_text (uiout
, "\tstop only if ");
3518 print_expression (b
->cond
, stb
->stream
);
3519 ui_out_field_stream (uiout
, "cond", stb
);
3520 ui_out_text (uiout
, "\n");
3523 if (b
->pending
&& b
->cond_string
)
3526 ui_out_text (uiout
, "\tstop only if ");
3527 ui_out_field_string (uiout
, "cond", b
->cond_string
);
3528 ui_out_text (uiout
, "\n");
3531 if (b
->thread
!= -1)
3533 /* FIXME should make an annotation for this */
3534 ui_out_text (uiout
, "\tstop only in thread ");
3535 ui_out_field_int (uiout
, "thread", b
->thread
);
3536 ui_out_text (uiout
, "\n");
3539 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3541 /* FIXME should make an annotation for this */
3542 if (ep_is_catchpoint (b
))
3543 ui_out_text (uiout
, "\tcatchpoint");
3545 ui_out_text (uiout
, "\tbreakpoint");
3546 ui_out_text (uiout
, " already hit ");
3547 ui_out_field_int (uiout
, "times", b
->hit_count
);
3548 if (b
->hit_count
== 1)
3549 ui_out_text (uiout
, " time\n");
3551 ui_out_text (uiout
, " times\n");
3554 /* Output the count also if it is zero, but only if this is
3555 mi. FIXME: Should have a better test for this. */
3556 if (ui_out_is_mi_like_p (uiout
))
3557 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3558 ui_out_field_int (uiout
, "times", b
->hit_count
);
3560 if (b
->ignore_count
)
3563 ui_out_text (uiout
, "\tignore next ");
3564 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3565 ui_out_text (uiout
, " hits\n");
3568 if ((l
= b
->commands
))
3570 struct cleanup
*script_chain
;
3573 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3574 print_command_lines (uiout
, l
, 4);
3575 do_cleanups (script_chain
);
3577 do_cleanups (bkpt_chain
);
3578 do_cleanups (old_chain
);
3581 struct captured_breakpoint_query_args
3587 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3589 struct captured_breakpoint_query_args
*args
= data
;
3590 struct breakpoint
*b
;
3591 CORE_ADDR dummy_addr
= 0;
3594 if (args
->bnum
== b
->number
)
3596 print_one_breakpoint (b
, &dummy_addr
);
3604 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
, char **error_message
)
3606 struct captured_breakpoint_query_args args
;
3608 /* For the moment we don't trust print_one_breakpoint() to not throw
3610 return catch_exceptions_with_msg (uiout
, do_captured_breakpoint_query
, &args
,
3611 NULL
, error_message
, RETURN_MASK_ALL
);
3614 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3615 catchpoints, et.al.). */
3618 user_settable_breakpoint (const struct breakpoint
*b
)
3620 return (b
->type
== bp_breakpoint
3621 || b
->type
== bp_catch_load
3622 || b
->type
== bp_catch_unload
3623 || b
->type
== bp_catch_fork
3624 || b
->type
== bp_catch_vfork
3625 || b
->type
== bp_catch_exec
3626 || b
->type
== bp_catch_catch
3627 || b
->type
== bp_catch_throw
3628 || b
->type
== bp_hardware_breakpoint
3629 || b
->type
== bp_watchpoint
3630 || b
->type
== bp_read_watchpoint
3631 || b
->type
== bp_access_watchpoint
3632 || b
->type
== bp_hardware_watchpoint
);
3635 /* Print information on user settable breakpoint (watchpoint, etc)
3636 number BNUM. If BNUM is -1 print all user settable breakpoints.
3637 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3640 breakpoint_1 (int bnum
, int allflag
)
3642 struct breakpoint
*b
;
3643 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3644 int nr_printable_breakpoints
;
3645 struct cleanup
*bkpttbl_chain
;
3647 /* Compute the number of rows in the table. */
3648 nr_printable_breakpoints
= 0;
3651 || bnum
== b
->number
)
3653 if (allflag
|| user_settable_breakpoint (b
))
3654 nr_printable_breakpoints
++;
3659 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3663 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3666 if (nr_printable_breakpoints
> 0)
3667 annotate_breakpoints_headers ();
3668 if (nr_printable_breakpoints
> 0)
3670 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3671 if (nr_printable_breakpoints
> 0)
3673 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3674 if (nr_printable_breakpoints
> 0)
3676 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3677 if (nr_printable_breakpoints
> 0)
3679 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3682 if (nr_printable_breakpoints
> 0)
3684 if (TARGET_ADDR_BIT
<= 32)
3685 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3687 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3689 if (nr_printable_breakpoints
> 0)
3691 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3692 ui_out_table_body (uiout
);
3693 if (nr_printable_breakpoints
> 0)
3694 annotate_breakpoints_table ();
3698 || bnum
== b
->number
)
3700 /* We only print out user settable breakpoints unless the
3702 if (allflag
|| user_settable_breakpoint (b
))
3703 print_one_breakpoint (b
, &last_addr
);
3706 do_cleanups (bkpttbl_chain
);
3708 if (nr_printable_breakpoints
== 0)
3711 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3713 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3718 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3719 that a comparison of an unsigned with -1 is always false. */
3720 if (last_addr
!= (CORE_ADDR
) -1)
3721 set_next_address (last_addr
);
3724 /* FIXME? Should this be moved up so that it is only called when
3725 there have been breakpoints? */
3726 annotate_breakpoints_table_end ();
3730 breakpoints_info (char *bnum_exp
, int from_tty
)
3735 bnum
= parse_and_eval_long (bnum_exp
);
3737 breakpoint_1 (bnum
, 0);
3741 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3746 bnum
= parse_and_eval_long (bnum_exp
);
3748 breakpoint_1 (bnum
, 1);
3751 /* Print a message describing any breakpoints set at PC. */
3754 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
)
3757 struct breakpoint
*b
;
3760 if (b
->loc
->address
== pc
) /* address match / overlay match */
3761 if (!b
->pending
&& (!overlay_debugging
|| b
->loc
->section
== section
))
3765 printf_filtered ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
3767 if (b
->loc
->address
== pc
) /* address match / overlay match */
3768 if (!b
->pending
&& (!overlay_debugging
|| b
->loc
->section
== section
))
3771 printf_filtered ("%d%s%s ",
3773 ((b
->enable_state
== bp_disabled
||
3774 b
->enable_state
== bp_shlib_disabled
||
3775 b
->enable_state
== bp_call_disabled
)
3777 : b
->enable_state
== bp_permanent
3781 : ((others
== 1) ? " and" : ""));
3783 printf_filtered ("also set at pc ");
3784 print_address_numeric (pc
, 1, gdb_stdout
);
3785 printf_filtered (".\n");
3789 /* Set the default place to put a breakpoint
3790 for the `break' command with no arguments. */
3793 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3796 default_breakpoint_valid
= valid
;
3797 default_breakpoint_address
= addr
;
3798 default_breakpoint_symtab
= symtab
;
3799 default_breakpoint_line
= line
;
3802 /* Return true iff it is meaningful to use the address member of
3803 BPT. For some breakpoint types, the address member is irrelevant
3804 and it makes no sense to attempt to compare it to other addresses
3805 (or use it for any other purpose either).
3807 More specifically, each of the following breakpoint types will always
3808 have a zero valued address and we don't want check_duplicates() to mark
3809 breakpoints of any of these types to be a duplicate of an actual
3810 breakpoint at address zero:
3813 bp_hardware_watchpoint
3815 bp_access_watchpoint
3822 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3824 enum bptype type
= bpt
->type
;
3826 return (type
!= bp_watchpoint
3827 && type
!= bp_hardware_watchpoint
3828 && type
!= bp_read_watchpoint
3829 && type
!= bp_access_watchpoint
3830 && type
!= bp_catch_exec
3831 && type
!= bp_longjmp_resume
3832 && type
!= bp_catch_fork
3833 && type
!= bp_catch_vfork
);
3836 /* Rescan breakpoints at the same address and section as BPT,
3837 marking the first one as "first" and any others as "duplicates".
3838 This is so that the bpt instruction is only inserted once.
3839 If we have a permanent breakpoint at the same place as BPT, make
3840 that one the official one, and the rest as duplicates. */
3843 check_duplicates (struct breakpoint
*bpt
)
3845 struct bp_location
*b
;
3847 struct bp_location
*perm_bp
= 0;
3848 CORE_ADDR address
= bpt
->loc
->address
;
3849 asection
*section
= bpt
->loc
->section
;
3851 if (! breakpoint_address_is_meaningful (bpt
))
3854 ALL_BP_LOCATIONS (b
)
3855 if (b
->owner
->enable_state
!= bp_disabled
3856 && b
->owner
->enable_state
!= bp_shlib_disabled
3857 && !b
->owner
->pending
3858 && b
->owner
->enable_state
!= bp_call_disabled
3859 && b
->address
== address
/* address / overlay match */
3860 && (!overlay_debugging
|| b
->section
== section
)
3861 && breakpoint_address_is_meaningful (b
->owner
))
3863 /* Have we found a permanent breakpoint? */
3864 if (b
->owner
->enable_state
== bp_permanent
)
3871 b
->duplicate
= count
> 1;
3874 /* If we found a permanent breakpoint at this address, go over the
3875 list again and declare all the other breakpoints there to be the
3879 perm_bp
->duplicate
= 0;
3881 /* Permanent breakpoint should always be inserted. */
3882 if (! perm_bp
->inserted
)
3883 internal_error (__FILE__
, __LINE__
,
3884 "allegedly permanent breakpoint is not "
3885 "actually inserted");
3887 ALL_BP_LOCATIONS (b
)
3890 if (b
->owner
->enable_state
!= bp_disabled
3891 && b
->owner
->enable_state
!= bp_shlib_disabled
3892 && !b
->owner
->pending
3893 && b
->owner
->enable_state
!= bp_call_disabled
3894 && b
->address
== address
/* address / overlay match */
3895 && (!overlay_debugging
|| b
->section
== section
)
3896 && breakpoint_address_is_meaningful (b
->owner
))
3899 internal_error (__FILE__
, __LINE__
,
3900 "another breakpoint was inserted on top of "
3901 "a permanent breakpoint");
3910 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
3911 int bnum
, int have_bnum
)
3916 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
3917 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
3919 warning ("Breakpoint %d address previously adjusted from %s to %s.",
3920 bnum
, astr1
, astr2
);
3922 warning ("Breakpoint address adjusted from %s to %s.", astr1
, astr2
);
3925 /* Adjust a breakpoint's address to account for architectural constraints
3926 on breakpoint placement. Return the adjusted address. Note: Very
3927 few targets require this kind of adjustment. For most targets,
3928 this function is simply the identity function. */
3931 adjust_breakpoint_address (CORE_ADDR bpaddr
, enum bptype bptype
)
3933 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
3935 /* Very few targets need any kind of breakpoint adjustment. */
3938 else if (bptype
== bp_watchpoint
3939 || bptype
== bp_hardware_watchpoint
3940 || bptype
== bp_read_watchpoint
3941 || bptype
== bp_access_watchpoint
3942 || bptype
== bp_catch_fork
3943 || bptype
== bp_catch_vfork
3944 || bptype
== bp_catch_exec
)
3946 /* Watchpoints and the various bp_catch_* eventpoints should not
3947 have their addresses modified. */
3952 CORE_ADDR adjusted_bpaddr
;
3954 /* Some targets have architectural constraints on the placement
3955 of breakpoint instructions. Obtain the adjusted address. */
3956 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
3959 /* An adjusted breakpoint address can significantly alter
3960 a user's expectations. Print a warning if an adjustment
3962 if (adjusted_bpaddr
!= bpaddr
)
3963 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
3965 return adjusted_bpaddr
;
3969 /* Allocate a struct bp_location. */
3971 static struct bp_location
*
3972 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
)
3974 struct bp_location
*loc
, *loc_p
;
3976 loc
= xmalloc (sizeof (struct bp_location
));
3977 memset (loc
, 0, sizeof (*loc
));
3987 case bp_longjmp_resume
:
3988 case bp_step_resume
:
3989 case bp_through_sigtramp
:
3990 case bp_watchpoint_scope
:
3992 case bp_shlib_event
:
3993 case bp_thread_event
:
3994 case bp_overlay_event
:
3996 case bp_catch_unload
:
3997 loc
->loc_type
= bp_loc_software_breakpoint
;
3999 case bp_hardware_breakpoint
:
4000 loc
->loc_type
= bp_loc_hardware_breakpoint
;
4002 case bp_hardware_watchpoint
:
4003 case bp_read_watchpoint
:
4004 case bp_access_watchpoint
:
4005 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4009 case bp_catch_vfork
:
4011 case bp_catch_catch
:
4012 case bp_catch_throw
:
4013 loc
->loc_type
= bp_loc_other
;
4016 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
4019 /* Add this breakpoint to the end of the chain. */
4021 loc_p
= bp_location_chain
;
4023 bp_location_chain
= loc
;
4027 loc_p
= loc_p
->next
;
4034 /* set_raw_breakpoint() is a low level routine for allocating and
4035 partially initializing a breakpoint of type BPTYPE. The newly
4036 created breakpoint's address, section, source file name, and line
4037 number are provided by SAL. The newly created and partially
4038 initialized breakpoint is added to the breakpoint chain and
4039 is also returned as the value of this function.
4041 It is expected that the caller will complete the initialization of
4042 the newly created breakpoint struct as well as output any status
4043 information regarding the creation of a new breakpoint. In
4044 particular, set_raw_breakpoint() does NOT set the breakpoint
4045 number! Care should be taken to not allow an error() to occur
4046 prior to completing the initialization of the breakpoint. If this
4047 should happen, a bogus breakpoint will be left on the chain. */
4050 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4052 struct breakpoint
*b
, *b1
;
4054 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4055 memset (b
, 0, sizeof (*b
));
4056 b
->loc
= allocate_bp_location (b
, bptype
);
4057 b
->loc
->requested_address
= sal
.pc
;
4058 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
,
4060 if (sal
.symtab
== NULL
)
4061 b
->source_file
= NULL
;
4063 b
->source_file
= savestring (sal
.symtab
->filename
,
4064 strlen (sal
.symtab
->filename
));
4065 b
->loc
->section
= sal
.section
;
4067 b
->language
= current_language
->la_language
;
4068 b
->input_radix
= input_radix
;
4070 b
->line_number
= sal
.line
;
4071 b
->enable_state
= bp_enabled
;
4074 b
->ignore_count
= 0;
4076 b
->frame_id
= null_frame_id
;
4077 b
->dll_pathname
= NULL
;
4078 b
->triggered_dll_pathname
= NULL
;
4079 b
->forked_inferior_pid
= 0;
4080 b
->exec_pathname
= NULL
;
4084 /* Add this breakpoint to the end of the chain
4085 so that a list of breakpoints will come out in order
4086 of increasing numbers. */
4088 b1
= breakpoint_chain
;
4090 breakpoint_chain
= b
;
4098 check_duplicates (b
);
4099 breakpoints_changed ();
4105 /* Note that the breakpoint object B describes a permanent breakpoint
4106 instruction, hard-wired into the inferior's code. */
4108 make_breakpoint_permanent (struct breakpoint
*b
)
4110 b
->enable_state
= bp_permanent
;
4112 /* By definition, permanent breakpoints are already present in the code. */
4113 b
->loc
->inserted
= 1;
4116 static struct breakpoint
*
4117 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4119 static int internal_breakpoint_number
= -1;
4120 struct symtab_and_line sal
;
4121 struct breakpoint
*b
;
4123 init_sal (&sal
); /* initialize to zeroes */
4126 sal
.section
= find_pc_overlay (sal
.pc
);
4128 b
= set_raw_breakpoint (sal
, type
);
4129 b
->number
= internal_breakpoint_number
--;
4130 b
->disposition
= disp_donttouch
;
4137 create_longjmp_breakpoint (char *func_name
)
4139 struct breakpoint
*b
;
4140 struct minimal_symbol
*m
;
4142 if (func_name
== NULL
)
4143 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
4146 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4149 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4152 b
->enable_state
= bp_disabled
;
4155 b
->addr_string
= xstrdup (func_name
);
4158 /* Call this routine when stepping and nexting to enable a breakpoint
4159 if we do a longjmp(). When we hit that breakpoint, call
4160 set_longjmp_resume_breakpoint() to figure out where we are going. */
4163 enable_longjmp_breakpoint (void)
4165 struct breakpoint
*b
;
4168 if (b
->type
== bp_longjmp
)
4170 b
->enable_state
= bp_enabled
;
4171 check_duplicates (b
);
4176 disable_longjmp_breakpoint (void)
4178 struct breakpoint
*b
;
4181 if (b
->type
== bp_longjmp
4182 || b
->type
== bp_longjmp_resume
)
4184 b
->enable_state
= bp_disabled
;
4185 check_duplicates (b
);
4190 create_overlay_event_breakpoint (char *func_name
)
4192 struct breakpoint
*b
;
4193 struct minimal_symbol
*m
;
4195 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4198 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4200 b
->addr_string
= xstrdup (func_name
);
4202 if (overlay_debugging
== ovly_auto
)
4204 b
->enable_state
= bp_enabled
;
4205 overlay_events_enabled
= 1;
4209 b
->enable_state
= bp_disabled
;
4210 overlay_events_enabled
= 0;
4215 enable_overlay_breakpoints (void)
4217 struct breakpoint
*b
;
4220 if (b
->type
== bp_overlay_event
)
4222 b
->enable_state
= bp_enabled
;
4223 check_duplicates (b
);
4224 overlay_events_enabled
= 1;
4229 disable_overlay_breakpoints (void)
4231 struct breakpoint
*b
;
4234 if (b
->type
== bp_overlay_event
)
4236 b
->enable_state
= bp_disabled
;
4237 check_duplicates (b
);
4238 overlay_events_enabled
= 0;
4243 create_thread_event_breakpoint (CORE_ADDR address
)
4245 struct breakpoint
*b
;
4247 b
= create_internal_breakpoint (address
, bp_thread_event
);
4249 b
->enable_state
= bp_enabled
;
4250 /* addr_string has to be used or breakpoint_re_set will delete me. */
4251 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4257 remove_thread_event_breakpoints (void)
4259 struct breakpoint
*b
, *temp
;
4261 ALL_BREAKPOINTS_SAFE (b
, temp
)
4262 if (b
->type
== bp_thread_event
)
4263 delete_breakpoint (b
);
4266 struct captured_parse_breakpoint_args
4269 struct symtabs_and_lines
*sals_p
;
4270 char ***addr_string_p
;
4274 struct lang_and_radix
4280 /* Cleanup helper routine to restore the current language and
4283 do_restore_lang_radix_cleanup (void *old
)
4285 struct lang_and_radix
*p
= old
;
4286 set_language (p
->lang
);
4287 input_radix
= p
->radix
;
4290 /* Try and resolve a pending breakpoint. */
4292 resolve_pending_breakpoint (struct breakpoint
*b
)
4294 /* Try and reparse the breakpoint in case the shared library
4296 struct symtabs_and_lines sals
;
4297 struct symtab_and_line pending_sal
;
4298 char **cond_string
= (char **) NULL
;
4299 char *copy_arg
= b
->addr_string
;
4304 struct ui_file
*old_gdb_stderr
;
4305 struct lang_and_radix old_lr
;
4306 struct cleanup
*old_chain
;
4308 /* Set language, input-radix, then reissue breakpoint command.
4309 Ensure the language and input-radix are restored afterwards. */
4310 old_lr
.lang
= current_language
->la_language
;
4311 old_lr
.radix
= input_radix
;
4312 old_chain
= make_cleanup (do_restore_lang_radix_cleanup
, &old_lr
);
4314 set_language (b
->language
);
4315 input_radix
= b
->input_radix
;
4316 rc
= break_command_1 (b
->addr_string
, b
->flag
, b
->from_tty
, b
);
4318 if (rc
== GDB_RC_OK
)
4319 /* Pending breakpoint has been resolved. */
4320 printf_filtered ("Pending breakpoint \"%s\" resolved\n", b
->addr_string
);
4322 do_cleanups (old_chain
);
4328 remove_solib_event_breakpoints (void)
4330 struct breakpoint
*b
, *temp
;
4332 ALL_BREAKPOINTS_SAFE (b
, temp
)
4333 if (b
->type
== bp_shlib_event
)
4334 delete_breakpoint (b
);
4338 create_solib_event_breakpoint (CORE_ADDR address
)
4340 struct breakpoint
*b
;
4342 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4346 /* Disable any breakpoints that are on code in shared libraries. Only
4347 apply to enabled breakpoints, disabled ones can just stay disabled. */
4350 disable_breakpoints_in_shlibs (int silent
)
4352 struct breakpoint
*b
;
4353 int disabled_shlib_breaks
= 0;
4355 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4358 #if defined (PC_SOLIB)
4359 if (((b
->type
== bp_breakpoint
) ||
4360 (b
->type
== bp_hardware_breakpoint
)) &&
4361 breakpoint_enabled (b
) &&
4362 !b
->loc
->duplicate
&&
4363 PC_SOLIB (b
->loc
->address
))
4365 b
->enable_state
= bp_shlib_disabled
;
4368 if (!disabled_shlib_breaks
)
4370 target_terminal_ours_for_output ();
4371 warning ("Temporarily disabling shared library breakpoints:");
4373 disabled_shlib_breaks
= 1;
4374 warning ("breakpoint #%d ", b
->number
);
4381 /* Disable any breakpoints that are in in an unloaded shared library. Only
4382 apply to enabled breakpoints, disabled ones can just stay disabled. */
4385 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
4387 struct breakpoint
*b
;
4388 int disabled_shlib_breaks
= 0;
4390 #if defined (PC_SOLIB)
4391 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4394 if ((b
->loc
->loc_type
== bp_loc_hardware_breakpoint
4395 || b
->loc
->loc_type
== bp_loc_software_breakpoint
)
4396 && breakpoint_enabled (b
)
4397 && !b
->loc
->duplicate
)
4399 char *so_name
= PC_SOLIB (b
->loc
->address
);
4401 && !strcmp (so_name
, solib
->so_name
))
4403 b
->enable_state
= bp_shlib_disabled
;
4404 /* At this point, we cannot rely on remove_breakpoint
4405 succeeding so we must mark the breakpoint as not inserted
4406 to prevent future errors occurring in remove_breakpoints. */
4407 b
->loc
->inserted
= 0;
4408 if (!disabled_shlib_breaks
)
4410 target_terminal_ours_for_output ();
4411 warning ("Temporarily disabling breakpoints for unloaded shared library \"%s\"",
4414 disabled_shlib_breaks
= 1;
4421 /* Try to reenable any breakpoints in shared libraries. */
4423 re_enable_breakpoints_in_shlibs (void)
4425 struct breakpoint
*b
, *tmp
;
4427 ALL_BREAKPOINTS_SAFE (b
, tmp
)
4429 if (b
->enable_state
== bp_shlib_disabled
)
4433 /* Do not reenable the breakpoint if the shared library
4434 is still not mapped in. */
4435 lib
= PC_SOLIB (b
->loc
->address
);
4436 if (lib
!= NULL
&& target_read_memory (b
->loc
->address
, buf
, 1) == 0)
4437 b
->enable_state
= bp_enabled
;
4439 else if (b
->pending
&& (b
->enable_state
== bp_enabled
))
4441 if (resolve_pending_breakpoint (b
) == GDB_RC_OK
)
4442 delete_breakpoint (b
);
4450 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
4451 char *cond_string
, enum bptype bp_kind
)
4453 struct breakpoint
*b
;
4454 struct symtabs_and_lines sals
;
4455 struct cleanup
*old_chain
;
4456 struct cleanup
*canonical_strings_chain
= NULL
;
4457 char *addr_start
= hookname
;
4458 char *addr_end
= NULL
;
4459 char **canonical
= (char **) NULL
;
4460 int thread
= -1; /* All threads. */
4462 /* Set a breakpoint on the specified hook. */
4463 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
,
4464 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
);
5089 /* Set a breakpoint according to ARG (function, linenum or *address)
5090 flag: first bit : 0 non-temporary, 1 temporary.
5091 second bit : 0 normal breakpoint, 1 hardware breakpoint.
5093 PENDING_BP is non-NULL when this function is being called to resolve
5094 a pending breakpoint. */
5097 break_command_1 (char *arg
, int flag
, int from_tty
, struct breakpoint
*pending_bp
)
5100 int tempflag
, hardwareflag
;
5101 struct symtabs_and_lines sals
;
5102 struct expression
**cond
= 0;
5103 struct symtab_and_line pending_sal
;
5104 char **cond_string
= (char **) NULL
;
5107 char *addr_start
= arg
;
5109 struct cleanup
*old_chain
;
5110 struct cleanup
*breakpoint_chain
= NULL
;
5111 struct captured_parse_breakpoint_args parse_args
;
5115 int ignore_count
= 0;
5118 hardwareflag
= flag
& BP_HARDWAREFLAG
;
5119 tempflag
= flag
& BP_TEMPFLAG
;
5125 parse_args
.arg_p
= &arg
;
5126 parse_args
.sals_p
= &sals
;
5127 parse_args
.addr_string_p
= &addr_string
;
5128 parse_args
.not_found_ptr
= ¬_found
;
5130 e
= catch_exception (uiout
, do_captured_parse_breakpoint
,
5131 &parse_args
, RETURN_MASK_ALL
);
5133 /* If caller is interested in rc value from parse, set value. */
5137 exception_print (gdb_stderr
, NULL
, e
);
5142 case NOT_FOUND_ERROR
:
5143 /* If called to resolve pending breakpoint, just return
5148 exception_print (gdb_stderr
, NULL
, e
);
5150 /* If pending breakpoint support is turned off, throw
5153 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
5154 throw_reason (RETURN_ERROR
);
5156 /* If pending breakpoint support is auto query and the user
5157 selects no, then simply return the error code. */
5158 if (pending_break_support
== AUTO_BOOLEAN_AUTO
&&
5159 !nquery ("Make breakpoint pending on future shared library load? "))
5162 /* At this point, either the user was queried about setting
5163 a pending breakpoint and selected yes, or pending
5164 breakpoint behavior is on and thus a pending breakpoint
5165 is defaulted on behalf of the user. */
5166 copy_arg
= xstrdup (addr_start
);
5167 addr_string
= ©_arg
;
5169 sals
.sals
= &pending_sal
;
5174 exception_print (gdb_stderr
, NULL
, e
);
5182 /* Create a chain of things that always need to be cleaned up. */
5183 old_chain
= make_cleanup (null_cleanup
, 0);
5187 /* Make sure that all storage allocated to SALS gets freed. */
5188 make_cleanup (xfree
, sals
.sals
);
5190 /* Cleanup the addr_string array but not its contents. */
5191 make_cleanup (xfree
, addr_string
);
5194 /* Allocate space for all the cond expressions. */
5195 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5196 make_cleanup (xfree
, cond
);
5198 /* Allocate space for all the cond strings. */
5199 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5200 make_cleanup (xfree
, cond_string
);
5202 /* ----------------------------- SNIP -----------------------------
5203 Anything added to the cleanup chain beyond this point is assumed
5204 to be part of a breakpoint. If the breakpoint create succeeds
5205 then the memory is not reclaimed. */
5206 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5208 /* Mark the contents of the addr_string for cleanup. These go on
5209 the breakpoint_chain and only occure if the breakpoint create
5211 for (i
= 0; i
< sals
.nelts
; i
++)
5213 if (addr_string
[i
] != NULL
)
5214 make_cleanup (xfree
, addr_string
[i
]);
5217 /* Resolve all line numbers to PC's and verify that the addresses
5218 are ok for the target. */
5220 breakpoint_sals_to_pc (&sals
, addr_start
);
5222 /* Verify that condition can be parsed, before setting any
5223 breakpoints. Allocate a separate condition expression for each
5225 thread
= -1; /* No specific thread yet */
5228 for (i
= 0; i
< sals
.nelts
; i
++)
5235 char *cond_start
= NULL
;
5236 char *cond_end
= NULL
;
5237 while (*tok
== ' ' || *tok
== '\t')
5242 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5245 toklen
= end_tok
- tok
;
5247 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5249 tok
= cond_start
= end_tok
+ 1;
5250 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
),
5252 make_cleanup (xfree
, cond
[i
]);
5254 cond_string
[i
] = savestring (cond_start
,
5255 cond_end
- cond_start
);
5256 make_cleanup (xfree
, cond_string
[i
]);
5258 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5264 thread
= strtol (tok
, &tok
, 0);
5266 error ("Junk after thread keyword.");
5267 if (!valid_thread_id (thread
))
5268 error ("Unknown thread %d\n", thread
);
5271 error ("Junk at end of arguments.");
5274 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5275 hardwareflag
? bp_hardware_breakpoint
5277 tempflag
? disp_del
: disp_donttouch
,
5278 thread
, ignore_count
, from_tty
,
5283 struct symtab_and_line sal
;
5284 struct breakpoint
*b
;
5289 make_cleanup (xfree
, copy_arg
);
5291 b
= set_raw_breakpoint (sal
, hardwareflag
? bp_hardware_breakpoint
5293 set_breakpoint_count (breakpoint_count
+ 1);
5294 b
->number
= breakpoint_count
;
5297 b
->addr_string
= *addr_string
;
5298 b
->cond_string
= *cond_string
;
5299 b
->ignore_count
= ignore_count
;
5301 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5302 b
->from_tty
= from_tty
;
5309 warning ("Multiple breakpoints were set.");
5310 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5312 /* That's it. Discard the cleanups for data inserted into the
5314 discard_cleanups (breakpoint_chain
);
5315 /* But cleanup everything else. */
5316 do_cleanups (old_chain
);
5321 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
5322 linenum or *address) with COND and IGNORE_COUNT. */
5324 struct captured_breakpoint_args
5335 do_captured_breakpoint (struct ui_out
*uiout
, void *data
)
5337 struct captured_breakpoint_args
*args
= data
;
5338 struct symtabs_and_lines sals
;
5339 struct expression
**cond
;
5340 struct cleanup
*old_chain
;
5341 struct cleanup
*breakpoint_chain
= NULL
;
5348 /* Parse the source and lines spec. Delay check that the expression
5349 didn't contain trailing garbage until after cleanups are in
5353 address_end
= args
->address
;
5355 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
, 0);
5360 /* Create a chain of things at always need to be cleaned up. */
5361 old_chain
= make_cleanup (null_cleanup
, 0);
5363 /* Always have a addr_string array, even if it is empty. */
5364 make_cleanup (xfree
, addr_string
);
5366 /* Make sure that all storage allocated to SALS gets freed. */
5367 make_cleanup (xfree
, sals
.sals
);
5369 /* Allocate space for all the cond expressions. */
5370 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5371 make_cleanup (xfree
, cond
);
5373 /* Allocate space for all the cond strings. */
5374 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5375 make_cleanup (xfree
, cond_string
);
5377 /* ----------------------------- SNIP -----------------------------
5378 Anything added to the cleanup chain beyond this point is assumed
5379 to be part of a breakpoint. If the breakpoint create goes
5380 through then that memory is not cleaned up. */
5381 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5383 /* Mark the contents of the addr_string for cleanup. These go on
5384 the breakpoint_chain and only occure if the breakpoint create
5386 for (i
= 0; i
< sals
.nelts
; i
++)
5388 if (addr_string
[i
] != NULL
)
5389 make_cleanup (xfree
, addr_string
[i
]);
5392 /* Wait until now before checking for garbage at the end of the
5393 address. That way cleanups can take care of freeing any
5395 if (*address_end
!= '\0')
5396 error ("Garbage %s following breakpoint address", address_end
);
5398 /* Resolve all line numbers to PC's. */
5399 breakpoint_sals_to_pc (&sals
, args
->address
);
5401 /* Verify that conditions can be parsed, before setting any
5403 for (i
= 0; i
< sals
.nelts
; i
++)
5405 if (args
->condition
!= NULL
)
5407 char *tok
= args
->condition
;
5408 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
5410 error ("Garbage %s follows condition", tok
);
5411 make_cleanup (xfree
, cond
[i
]);
5412 cond_string
[i
] = xstrdup (args
->condition
);
5416 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5417 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
5418 args
->tempflag
? disp_del
: disp_donttouch
,
5419 args
->thread
, args
->ignore_count
, 0/*from-tty*/,
5420 NULL
/*pending_bp*/);
5422 /* That's it. Discard the cleanups for data inserted into the
5424 discard_cleanups (breakpoint_chain
);
5425 /* But cleanup everything else. */
5426 do_cleanups (old_chain
);
5431 gdb_breakpoint (char *address
, char *condition
,
5432 int hardwareflag
, int tempflag
,
5433 int thread
, int ignore_count
,
5434 char **error_message
)
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_exceptions_with_msg (uiout
, do_captured_breakpoint
, &args
,
5444 NULL
, error_message
, 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
;