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 target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
724 target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
727 target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
730 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
735 /* Helper routine: free the value chain for a breakpoint (watchpoint). */
737 static void free_valchain (struct bp_location
*b
)
742 /* Free the saved value chain. We will construct a new one
743 the next time the watchpoint is inserted. */
744 for (v
= b
->owner
->val_chain
; v
; v
= n
)
749 b
->owner
->val_chain
= NULL
;
752 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
753 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
754 PROCESS_WARNING, and HW_BREAKPOINT_ERROR are used to report problems.
756 NOTE drow/2003-09-09: This routine could be broken down to an object-style
757 method for each breakpoint or catchpoint type. */
759 insert_bp_location (struct bp_location
*bpt
,
760 struct ui_file
*tmp_error_stream
,
761 int *disabled_breaks
, int *process_warning
,
762 int *hw_breakpoint_error
)
766 /* Permanent breakpoints cannot be inserted or removed. Disabled
767 breakpoints should not be inserted. */
768 if (!breakpoint_enabled (bpt
->owner
))
771 if (bpt
->inserted
|| bpt
->duplicate
)
774 if (bpt
->loc_type
== bp_loc_software_breakpoint
775 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
777 /* First check to see if we have to handle an overlay. */
778 if (overlay_debugging
== ovly_off
779 || bpt
->section
== NULL
780 || !(section_is_overlay (bpt
->section
)))
782 /* No overlay handling: just set the breakpoint. */
784 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
785 val
= target_insert_hw_breakpoint (bpt
->address
,
786 bpt
->shadow_contents
);
788 val
= target_insert_breakpoint (bpt
->address
,
789 bpt
->shadow_contents
);
793 /* This breakpoint is in an overlay section.
794 Shall we set a breakpoint at the LMA? */
795 if (!overlay_events_enabled
)
797 /* Yes -- overlay event support is not active,
798 so we must try to set a breakpoint at the LMA.
799 This will not work for a hardware breakpoint. */
800 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
801 warning ("hardware breakpoint %d not supported in overlay!\n",
805 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
807 /* Set a software (trap) breakpoint at the LMA. */
808 val
= target_insert_breakpoint (addr
, bpt
->shadow_contents
);
810 fprintf_unfiltered (tmp_error_stream
,
811 "Overlay breakpoint %d failed: in ROM?",
815 /* Shall we set a breakpoint at the VMA? */
816 if (section_is_mapped (bpt
->section
))
818 /* Yes. This overlay section is mapped into memory. */
819 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
820 val
= target_insert_hw_breakpoint (bpt
->address
,
821 bpt
->shadow_contents
);
823 val
= target_insert_breakpoint (bpt
->address
,
824 bpt
->shadow_contents
);
828 /* No. This breakpoint will not be inserted.
829 No error, but do not mark the bp as 'inserted'. */
836 /* Can't set the breakpoint. */
837 #if defined (DISABLE_UNSETTABLE_BREAK)
838 if (DISABLE_UNSETTABLE_BREAK (bpt
->address
))
840 /* See also: disable_breakpoints_in_shlibs. */
842 bpt
->owner
->enable_state
= bp_shlib_disabled
;
843 if (!*disabled_breaks
)
845 fprintf_unfiltered (tmp_error_stream
,
846 "Cannot insert breakpoint %d.\n",
848 fprintf_unfiltered (tmp_error_stream
,
849 "Temporarily disabling shared library breakpoints:\n");
851 *disabled_breaks
= 1;
852 fprintf_unfiltered (tmp_error_stream
,
853 "breakpoint #%d\n", bpt
->owner
->number
);
858 #ifdef ONE_PROCESS_WRITETEXT
859 *process_warning
= 1;
861 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
863 *hw_breakpoint_error
= 1;
864 fprintf_unfiltered (tmp_error_stream
,
865 "Cannot insert hardware breakpoint %d.\n",
870 fprintf_unfiltered (tmp_error_stream
,
871 "Cannot insert breakpoint %d.\n",
873 fprintf_filtered (tmp_error_stream
,
874 "Error accessing memory address ");
875 print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
876 fprintf_filtered (tmp_error_stream
, ": %s.\n",
877 safe_strerror (val
));
888 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
889 /* NOTE drow/2003-09-08: This state only exists for removing
890 watchpoints. It's not clear that it's necessary... */
891 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
893 /* FIXME drow/2003-09-08: This code sets multiple hardware watchpoints
894 based on the expression. Ideally this should happen at a higher level,
895 and there should be one bp_location for each computed address we
896 must watch. As soon as a many-to-one mapping is available I'll
899 int within_current_scope
;
900 struct value
*mark
= value_mark ();
902 struct frame_id saved_frame_id
;
904 /* Save the current frame's ID so we can restore it after
905 evaluating the watchpoint expression on its own frame. */
906 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
907 took a frame parameter, so that we didn't have to change the
909 saved_frame_id
= get_frame_id (deprecated_selected_frame
);
911 /* Determine if the watchpoint is within scope. */
912 if (bpt
->owner
->exp_valid_block
== NULL
)
913 within_current_scope
= 1;
916 struct frame_info
*fi
;
917 fi
= frame_find_by_id (bpt
->owner
->watchpoint_frame
);
918 within_current_scope
= (fi
!= NULL
);
919 if (within_current_scope
)
923 if (within_current_scope
)
927 /* Evaluate the expression and cut the chain of values
928 produced off from the value chain.
930 Make sure the value returned isn't lazy; we use
931 laziness to determine what memory GDB actually needed
932 in order to compute the value of the expression. */
933 v
= evaluate_expression (bpt
->owner
->exp
);
935 value_release_to_mark (mark
);
937 bpt
->owner
->val_chain
= v
;
940 /* Look at each value on the value chain. */
941 for (; v
; v
= v
->next
)
943 /* If it's a memory location, and GDB actually needed
944 its contents to evaluate the expression, then we
946 if (VALUE_LVAL (v
) == lval_memory
949 struct type
*vtype
= check_typedef (value_type (v
));
951 /* We only watch structs and arrays if user asked
952 for it explicitly, never if they just happen to
953 appear in the middle of some value chain. */
954 if (v
== bpt
->owner
->val_chain
955 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
956 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
961 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
962 len
= TYPE_LENGTH (value_type (v
));
964 if (bpt
->owner
->type
== bp_read_watchpoint
)
966 else if (bpt
->owner
->type
== bp_access_watchpoint
)
969 val
= target_insert_watchpoint (addr
, len
, type
);
972 /* Don't exit the loop, try to insert
973 every value on the value chain. That's
974 because we will be removing all the
975 watches below, and removing a
976 watchpoint we didn't insert could have
984 /* Failure to insert a watchpoint on any memory value in the
985 value chain brings us here. */
988 remove_breakpoint (bpt
, mark_uninserted
);
989 *hw_breakpoint_error
= 1;
990 fprintf_unfiltered (tmp_error_stream
,
991 "Could not insert hardware watchpoint %d.\n",
998 printf_filtered ("Hardware watchpoint %d deleted ", bpt
->owner
->number
);
999 printf_filtered ("because the program has left the block \n");
1000 printf_filtered ("in which its expression is valid.\n");
1001 if (bpt
->owner
->related_breakpoint
)
1002 bpt
->owner
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1003 bpt
->owner
->disposition
= disp_del_at_next_stop
;
1006 /* Restore the selected frame. */
1007 select_frame (frame_find_by_id (saved_frame_id
));
1012 else if (ep_is_exception_catchpoint (bpt
->owner
))
1014 /* FIXME drow/2003-09-09: This code sets both a catchpoint and a
1015 breakpoint. Once again, it would be better if this was represented
1016 as two bp_locations. */
1018 /* If we get here, we must have a callback mechanism for exception
1019 events -- with g++ style embedded label support, we insert
1020 ordinary breakpoints and not catchpoints. */
1021 val
= target_insert_breakpoint (bpt
->address
, bpt
->shadow_contents
);
1024 /* Couldn't set breakpoint for some reason */
1025 fprintf_unfiltered (tmp_error_stream
,
1026 "Cannot insert catchpoint %d; disabling it.\n",
1027 bpt
->owner
->number
);
1028 fprintf_filtered (tmp_error_stream
,
1029 "Error accessing memory address ");
1030 print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
1031 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1032 safe_strerror (val
));
1033 bpt
->owner
->enable_state
= bp_disabled
;
1037 /* Bp set, now make sure callbacks are enabled */
1038 /* Format possible error msg */
1039 char *message
= xstrprintf ("Error inserting catchpoint %d:\n",
1040 bpt
->owner
->number
);
1041 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
1043 args_for_catchpoint_enable args
;
1044 args
.kind
= bpt
->owner
->type
== bp_catch_catch
?
1045 EX_EVENT_CATCH
: EX_EVENT_THROW
;
1047 val
= catch_errors (cover_target_enable_exception_callback
,
1048 &args
, message
, RETURN_MASK_ALL
);
1049 do_cleanups (cleanups
);
1050 if (val
!= 0 && val
!= -1)
1053 /* Check if something went wrong; val == 0 can be ignored */
1056 /* something went wrong */
1057 fprintf_unfiltered (tmp_error_stream
,
1058 "Cannot insert catchpoint %d; disabling it.\n",
1059 bpt
->owner
->number
);
1060 bpt
->owner
->enable_state
= bp_disabled
;
1067 else if (bpt
->owner
->type
== bp_catch_fork
1068 || bpt
->owner
->type
== bp_catch_vfork
1069 || bpt
->owner
->type
== bp_catch_exec
)
1071 struct exception e
= catch_exception (uiout
, insert_catchpoint
,
1072 bpt
->owner
, RETURN_MASK_ERROR
);
1073 exception_fprintf (gdb_stderr
, e
, "warning: inserting catchpoint %d: ",
1074 bpt
->owner
->number
);
1076 bpt
->owner
->enable_state
= bp_disabled
;
1080 /* We've already printed an error message if there was a problem
1081 inserting this catchpoint, and we've disabled the catchpoint,
1082 so just return success. */
1089 /* insert_breakpoints is used when starting or continuing the program.
1090 remove_breakpoints is used when the program stops.
1091 Both return zero if successful,
1092 or an `errno' value if could not write the inferior. */
1095 insert_breakpoints (void)
1097 struct bp_location
*b
, *temp
;
1098 int return_val
= 0; /* return success code. */
1100 int disabled_breaks
= 0;
1101 int hw_breakpoint_error
= 0;
1102 int process_warning
= 0;
1104 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1105 make_cleanup_ui_file_delete (tmp_error_stream
);
1107 /* Explicitly mark the warning -- this will only be printed if
1108 there was an error. */
1109 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1111 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1113 /* Permanent breakpoints cannot be inserted or removed. Disabled
1114 breakpoints should not be inserted. */
1115 if (!breakpoint_enabled (b
->owner
))
1118 /* FIXME drow/2003-10-07: This code should be pushed elsewhere when
1119 hardware watchpoints are split into multiple loc breakpoints. */
1120 if ((b
->loc_type
== bp_loc_hardware_watchpoint
1121 || b
->owner
->type
== bp_watchpoint
) && !b
->owner
->val
)
1124 val
= evaluate_expression (b
->owner
->exp
);
1125 release_value (val
);
1126 if (VALUE_LAZY (val
))
1127 value_fetch_lazy (val
);
1128 b
->owner
->val
= val
;
1131 val
= insert_bp_location (b
, tmp_error_stream
,
1132 &disabled_breaks
, &process_warning
,
1133 &hw_breakpoint_error
);
1140 /* If a hardware breakpoint or watchpoint was inserted, add a
1141 message about possibly exhausted resources. */
1142 if (hw_breakpoint_error
)
1144 fprintf_unfiltered (tmp_error_stream
,
1145 "Could not insert hardware breakpoints:\n\
1146 You may have requested too many hardware breakpoints/watchpoints.\n");
1148 #ifdef ONE_PROCESS_WRITETEXT
1149 if (process_warning
)
1150 fprintf_unfiltered (tmp_error_stream
,
1151 "The same program may be running in another process.");
1153 target_terminal_ours_for_output ();
1154 error_stream (tmp_error_stream
);
1160 remove_breakpoints (void)
1162 struct bp_location
*b
;
1165 ALL_BP_LOCATIONS (b
)
1169 val
= remove_breakpoint (b
, mark_uninserted
);
1178 remove_hw_watchpoints (void)
1180 struct bp_location
*b
;
1183 ALL_BP_LOCATIONS (b
)
1185 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1187 val
= remove_breakpoint (b
, mark_uninserted
);
1196 reattach_breakpoints (int pid
)
1198 struct bp_location
*b
;
1200 struct cleanup
*old_chain
= save_inferior_ptid ();
1202 /* Set inferior_ptid; remove_breakpoint uses this global. */
1203 inferior_ptid
= pid_to_ptid (pid
);
1204 ALL_BP_LOCATIONS (b
)
1208 remove_breakpoint (b
, mark_inserted
);
1209 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1210 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
1212 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
1213 /* FIXME drow/2003-10-07: This doesn't handle any other kinds of
1214 breakpoints. It's wrong for watchpoints, for example. */
1217 do_cleanups (old_chain
);
1222 do_cleanups (old_chain
);
1227 update_breakpoints_after_exec (void)
1229 struct breakpoint
*b
;
1230 struct breakpoint
*temp
;
1232 /* Doing this first prevents the badness of having delete_breakpoint()
1233 write a breakpoint's current "shadow contents" to lift the bp. That
1234 shadow is NOT valid after an exec()! */
1235 mark_breakpoints_out ();
1237 ALL_BREAKPOINTS_SAFE (b
, temp
)
1239 /* Solib breakpoints must be explicitly reset after an exec(). */
1240 if (b
->type
== bp_shlib_event
)
1242 delete_breakpoint (b
);
1246 /* Thread event breakpoints must be set anew after an exec(),
1247 as must overlay event breakpoints. */
1248 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1250 delete_breakpoint (b
);
1254 /* Step-resume breakpoints are meaningless after an exec(). */
1255 if (b
->type
== bp_step_resume
)
1257 delete_breakpoint (b
);
1261 /* Ditto the sigtramp handler breakpoints. */
1262 if (b
->type
== bp_through_sigtramp
)
1264 delete_breakpoint (b
);
1268 /* Ditto the exception-handling catchpoints. */
1269 if ((b
->type
== bp_catch_catch
) || (b
->type
== bp_catch_throw
))
1271 delete_breakpoint (b
);
1275 /* Don't delete an exec catchpoint, because else the inferior
1276 won't stop when it ought!
1278 Similarly, we probably ought to keep vfork catchpoints, 'cause
1279 on this target, we may not be able to stop when the vfork is
1280 seen, but only when the subsequent exec is seen. (And because
1281 deleting fork catchpoints here but not vfork catchpoints will
1282 seem mysterious to users, keep those too.)
1284 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1285 target address field, if any, is sufficient to have it be reset
1286 automagically. Certainly on HP-UX that's true.
1288 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1289 valid code address on some platforms (like the mn10300
1290 simulators). We shouldn't assign any special interpretation to
1291 a breakpoint with a zero address. And in fact, GDB doesn't ---
1292 I can't see what that comment above is talking about. As far
1293 as I can tell, setting the address of a
1294 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1295 is meaningless, since those are implemented with HP-UX kernel
1296 hackery, not by storing breakpoint instructions somewhere. */
1297 if ((b
->type
== bp_catch_exec
) ||
1298 (b
->type
== bp_catch_vfork
) ||
1299 (b
->type
== bp_catch_fork
))
1301 b
->loc
->address
= (CORE_ADDR
) NULL
;
1305 /* bp_finish is a special case. The only way we ought to be able
1306 to see one of these when an exec() has happened, is if the user
1307 caught a vfork, and then said "finish". Ordinarily a finish just
1308 carries them to the call-site of the current callee, by setting
1309 a temporary bp there and resuming. But in this case, the finish
1310 will carry them entirely through the vfork & exec.
1312 We don't want to allow a bp_finish to remain inserted now. But
1313 we can't safely delete it, 'cause finish_command has a handle to
1314 the bp on a bpstat, and will later want to delete it. There's a
1315 chance (and I've seen it happen) that if we delete the bp_finish
1316 here, that its storage will get reused by the time finish_command
1317 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1318 We really must allow finish_command to delete a bp_finish.
1320 In the absense of a general solution for the "how do we know
1321 it's safe to delete something others may have handles to?"
1322 problem, what we'll do here is just uninsert the bp_finish, and
1323 let finish_command delete it.
1325 (We know the bp_finish is "doomed" in the sense that it's
1326 momentary, and will be deleted as soon as finish_command sees
1327 the inferior stopped. So it doesn't matter that the bp's
1328 address is probably bogus in the new a.out, unlike e.g., the
1329 solib breakpoints.) */
1331 if (b
->type
== bp_finish
)
1336 /* Without a symbolic address, we have little hope of the
1337 pre-exec() address meaning the same thing in the post-exec()
1339 if (b
->addr_string
== NULL
)
1341 delete_breakpoint (b
);
1345 /* If this breakpoint has survived the above battery of checks, then
1346 it must have a symbolic address. Be sure that it gets reevaluated
1347 to a target address, rather than reusing the old evaluation.
1349 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1350 for bp_catch_exec and friends, I'm pretty sure this is entirely
1351 unnecessary. A call to breakpoint_re_set_one always recomputes
1352 the breakpoint's address from scratch, or deletes it if it can't.
1353 So I think this assignment could be deleted without effect. */
1354 b
->loc
->address
= (CORE_ADDR
) NULL
;
1356 /* FIXME what about longjmp breakpoints? Re-create them here? */
1357 create_overlay_event_breakpoint ("_ovly_debug_event");
1361 detach_breakpoints (int pid
)
1363 struct bp_location
*b
;
1365 struct cleanup
*old_chain
= save_inferior_ptid ();
1367 if (pid
== PIDGET (inferior_ptid
))
1368 error ("Cannot detach breakpoints of inferior_ptid");
1370 /* Set inferior_ptid; remove_breakpoint uses this global. */
1371 inferior_ptid
= pid_to_ptid (pid
);
1372 ALL_BP_LOCATIONS (b
)
1376 val
= remove_breakpoint (b
, mark_inserted
);
1379 do_cleanups (old_chain
);
1384 do_cleanups (old_chain
);
1389 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1393 if (b
->owner
->enable_state
== bp_permanent
)
1394 /* Permanent breakpoints cannot be inserted or removed. */
1397 if (b
->owner
->type
== bp_none
)
1398 warning ("attempted to remove apparently deleted breakpoint #%d?",
1401 if (b
->loc_type
== bp_loc_software_breakpoint
1402 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1404 /* "Normal" instruction breakpoint: either the standard
1405 trap-instruction bp (bp_breakpoint), or a
1406 bp_hardware_breakpoint. */
1408 /* First check to see if we have to handle an overlay. */
1409 if (overlay_debugging
== ovly_off
1410 || b
->section
== NULL
1411 || !(section_is_overlay (b
->section
)))
1413 /* No overlay handling: just remove the breakpoint. */
1415 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1416 val
= target_remove_hw_breakpoint (b
->address
,
1417 b
->shadow_contents
);
1419 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1423 /* This breakpoint is in an overlay section.
1424 Did we set a breakpoint at the LMA? */
1425 if (!overlay_events_enabled
)
1427 /* Yes -- overlay event support is not active, so we
1428 should have set a breakpoint at the LMA. Remove it.
1430 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
1432 /* Ignore any failures: if the LMA is in ROM, we will
1433 have already warned when we failed to insert it. */
1434 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1435 target_remove_hw_breakpoint (addr
, b
->shadow_contents
);
1437 target_remove_breakpoint (addr
, b
->shadow_contents
);
1439 /* Did we set a breakpoint at the VMA?
1440 If so, we will have marked the breakpoint 'inserted'. */
1443 /* Yes -- remove it. Previously we did not bother to
1444 remove the breakpoint if the section had been
1445 unmapped, but let's not rely on that being safe. We
1446 don't know what the overlay manager might do. */
1447 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1448 val
= target_remove_hw_breakpoint (b
->address
,
1449 b
->shadow_contents
);
1451 val
= target_remove_breakpoint (b
->address
,
1452 b
->shadow_contents
);
1456 /* No -- not inserted, so no need to remove. No error. */
1462 b
->inserted
= (is
== mark_inserted
);
1464 else if (b
->loc_type
== bp_loc_hardware_watchpoint
1465 && breakpoint_enabled (b
->owner
)
1471 b
->inserted
= (is
== mark_inserted
);
1472 /* Walk down the saved value chain. */
1473 for (v
= b
->owner
->val_chain
; v
; v
= v
->next
)
1475 /* For each memory reference remove the watchpoint
1477 if (VALUE_LVAL (v
) == lval_memory
1478 && ! VALUE_LAZY (v
))
1480 struct type
*vtype
= check_typedef (value_type (v
));
1482 if (v
== b
->owner
->val_chain
1483 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1484 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1489 addr
= VALUE_ADDRESS (v
) + value_offset (v
);
1490 len
= TYPE_LENGTH (value_type (v
));
1492 if (b
->owner
->type
== bp_read_watchpoint
)
1494 else if (b
->owner
->type
== bp_access_watchpoint
)
1497 val
= target_remove_watchpoint (addr
, len
, type
);
1504 /* Failure to remove any of the hardware watchpoints comes here. */
1505 if ((is
== mark_uninserted
) && (b
->inserted
))
1506 warning ("Could not remove hardware watchpoint %d.",
1509 else if ((b
->owner
->type
== bp_catch_fork
||
1510 b
->owner
->type
== bp_catch_vfork
||
1511 b
->owner
->type
== bp_catch_exec
)
1512 && breakpoint_enabled (b
->owner
)
1516 switch (b
->owner
->type
)
1519 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1521 case bp_catch_vfork
:
1522 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1525 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1528 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1533 b
->inserted
= (is
== mark_inserted
);
1535 else if ((b
->owner
->type
== bp_catch_catch
||
1536 b
->owner
->type
== bp_catch_throw
)
1537 && breakpoint_enabled (b
->owner
)
1541 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1544 b
->inserted
= (is
== mark_inserted
);
1546 else if (ep_is_exception_catchpoint (b
->owner
)
1547 && b
->inserted
/* sometimes previous insert doesn't happen */
1548 && breakpoint_enabled (b
->owner
)
1552 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1556 b
->inserted
= (is
== mark_inserted
);
1562 /* Clear the "inserted" flag in all breakpoints. */
1565 mark_breakpoints_out (void)
1567 struct bp_location
*bpt
;
1569 ALL_BP_LOCATIONS (bpt
)
1573 /* Clear the "inserted" flag in all breakpoints and delete any
1574 breakpoints which should go away between runs of the program.
1576 Plus other such housekeeping that has to be done for breakpoints
1579 Note: this function gets called at the end of a run (by
1580 generic_mourn_inferior) and when a run begins (by
1581 init_wait_for_inferior). */
1586 breakpoint_init_inferior (enum inf_context context
)
1588 struct breakpoint
*b
, *temp
;
1589 struct bp_location
*bpt
;
1590 static int warning_needed
= 0;
1592 ALL_BP_LOCATIONS (bpt
)
1595 ALL_BREAKPOINTS_SAFE (b
, temp
)
1600 case bp_watchpoint_scope
:
1602 /* If the call dummy breakpoint is at the entry point it will
1603 cause problems when the inferior is rerun, so we better
1606 Also get rid of scope breakpoints. */
1607 delete_breakpoint (b
);
1611 case bp_hardware_watchpoint
:
1612 case bp_read_watchpoint
:
1613 case bp_access_watchpoint
:
1615 /* Likewise for watchpoints on local expressions. */
1616 if (b
->exp_valid_block
!= NULL
)
1617 delete_breakpoint (b
);
1618 if (context
== inf_starting
)
1620 /* Reset val field to force reread of starting value
1621 in insert_breakpoints. */
1623 value_free (b
->val
);
1628 /* Likewise for exception catchpoints in dynamic-linked
1629 executables where required */
1630 if (ep_is_exception_catchpoint (b
)
1631 && deprecated_exception_catchpoints_are_fragile
)
1634 delete_breakpoint (b
);
1640 if (deprecated_exception_catchpoints_are_fragile
)
1641 deprecated_exception_support_initialized
= 0;
1643 /* Don't issue the warning unless it's really needed... */
1644 if (warning_needed
&& (context
!= inf_exited
))
1646 warning ("Exception catchpoints from last run were deleted.");
1647 warning ("You must reinsert them explicitly.");
1652 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1653 exists at PC. It returns ordinary_breakpoint_here if it's an
1654 ordinary breakpoint, or permanent_breakpoint_here if it's a
1655 permanent breakpoint.
1656 - When continuing from a location with an ordinary breakpoint, we
1657 actually single step once before calling insert_breakpoints.
1658 - When continuing from a localion with a permanent breakpoint, we
1659 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1660 the target, to advance the PC past the breakpoint. */
1662 enum breakpoint_here
1663 breakpoint_here_p (CORE_ADDR pc
)
1665 struct bp_location
*bpt
;
1666 int any_breakpoint_here
= 0;
1668 ALL_BP_LOCATIONS (bpt
)
1670 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1671 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1674 if ((breakpoint_enabled (bpt
->owner
)
1675 || bpt
->owner
->enable_state
== bp_permanent
)
1676 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1678 if (overlay_debugging
1679 && section_is_overlay (bpt
->section
)
1680 && !section_is_mapped (bpt
->section
))
1681 continue; /* unmapped overlay -- can't be a match */
1682 else if (bpt
->owner
->enable_state
== bp_permanent
)
1683 return permanent_breakpoint_here
;
1685 any_breakpoint_here
= 1;
1689 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1693 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1694 but it only returns true if there is actually a breakpoint inserted
1698 breakpoint_inserted_here_p (CORE_ADDR pc
)
1700 struct bp_location
*bpt
;
1702 ALL_BP_LOCATIONS (bpt
)
1704 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1705 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1709 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1711 if (overlay_debugging
1712 && section_is_overlay (bpt
->section
)
1713 && !section_is_mapped (bpt
->section
))
1714 continue; /* unmapped overlay -- can't be a match */
1723 /* This function returns non-zero iff there is a software breakpoint
1727 software_breakpoint_inserted_here_p (CORE_ADDR pc
)
1729 struct bp_location
*bpt
;
1730 int any_breakpoint_here
= 0;
1732 ALL_BP_LOCATIONS (bpt
)
1734 if (bpt
->loc_type
!= bp_loc_software_breakpoint
)
1737 if ((breakpoint_enabled (bpt
->owner
)
1738 || bpt
->owner
->enable_state
== bp_permanent
)
1740 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1742 if (overlay_debugging
1743 && section_is_overlay (bpt
->section
)
1744 && !section_is_mapped (bpt
->section
))
1745 continue; /* unmapped overlay -- can't be a match */
1754 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1755 PC is valid for process/thread PTID. */
1758 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1760 struct bp_location
*bpt
;
1763 thread
= pid_to_thread_id (ptid
);
1765 ALL_BP_LOCATIONS (bpt
)
1767 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1768 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1771 if ((breakpoint_enabled (bpt
->owner
)
1772 || bpt
->owner
->enable_state
== bp_permanent
)
1773 && bpt
->address
== pc
1774 && (bpt
->owner
->thread
== -1 || bpt
->owner
->thread
== thread
))
1776 if (overlay_debugging
1777 && section_is_overlay (bpt
->section
)
1778 && !section_is_mapped (bpt
->section
))
1779 continue; /* unmapped overlay -- can't be a match */
1789 /* bpstat stuff. External routines' interfaces are documented
1793 ep_is_catchpoint (struct breakpoint
*ep
)
1796 (ep
->type
== bp_catch_load
)
1797 || (ep
->type
== bp_catch_unload
)
1798 || (ep
->type
== bp_catch_fork
)
1799 || (ep
->type
== bp_catch_vfork
)
1800 || (ep
->type
== bp_catch_exec
)
1801 || (ep
->type
== bp_catch_catch
)
1802 || (ep
->type
== bp_catch_throw
);
1804 /* ??rehrauer: Add more kinds here, as are implemented... */
1808 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1811 (ep
->type
== bp_catch_load
)
1812 || (ep
->type
== bp_catch_unload
);
1816 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1819 (ep
->type
== bp_catch_catch
)
1820 || (ep
->type
== bp_catch_throw
);
1823 /* Clear a bpstat so that it says we are not at any breakpoint.
1824 Also free any storage that is part of a bpstat. */
1827 bpstat_clear (bpstat
*bsp
)
1838 if (p
->old_val
!= NULL
)
1839 value_free (p
->old_val
);
1840 free_command_lines (&p
->commands
);
1847 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1848 is part of the bpstat is copied as well. */
1851 bpstat_copy (bpstat bs
)
1855 bpstat retval
= NULL
;
1860 for (; bs
!= NULL
; bs
= bs
->next
)
1862 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1863 memcpy (tmp
, bs
, sizeof (*tmp
));
1864 if (bs
->commands
!= NULL
)
1865 tmp
->commands
= copy_command_lines (bs
->commands
);
1866 if (bs
->old_val
!= NULL
)
1867 tmp
->old_val
= value_copy (bs
->old_val
);
1870 /* This is the first thing in the chain. */
1880 /* Find the bpstat associated with this breakpoint */
1883 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1888 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1890 if (bsp
->breakpoint_at
== breakpoint
)
1896 /* Find a step_resume breakpoint associated with this bpstat.
1897 (If there are multiple step_resume bp's on the list, this function
1898 will arbitrarily pick one.)
1900 It is an error to use this function if BPSTAT doesn't contain a
1901 step_resume breakpoint.
1903 See wait_for_inferior's use of this function. */
1905 bpstat_find_step_resume_breakpoint (bpstat bsp
)
1910 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1912 current_thread
= pid_to_thread_id (inferior_ptid
);
1914 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1916 if ((bsp
->breakpoint_at
!= NULL
) &&
1917 (bsp
->breakpoint_at
->type
== bp_step_resume
) &&
1918 (bsp
->breakpoint_at
->thread
== current_thread
||
1919 bsp
->breakpoint_at
->thread
== -1))
1920 return bsp
->breakpoint_at
;
1923 error ("Internal error (no step_resume breakpoint found)");
1927 /* Return the breakpoint number of the first breakpoint we are stopped
1928 at. *BSP upon return is a bpstat which points to the remaining
1929 breakpoints stopped at (but which is not guaranteed to be good for
1930 anything but further calls to bpstat_num).
1931 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1934 bpstat_num (bpstat
*bsp
)
1936 struct breakpoint
*b
;
1939 return 0; /* No more breakpoint values */
1942 b
= (*bsp
)->breakpoint_at
;
1943 *bsp
= (*bsp
)->next
;
1945 return -1; /* breakpoint that's been deleted since */
1947 return b
->number
; /* We have its number */
1951 /* Modify BS so that the actions will not be performed. */
1954 bpstat_clear_actions (bpstat bs
)
1956 for (; bs
!= NULL
; bs
= bs
->next
)
1958 free_command_lines (&bs
->commands
);
1959 if (bs
->old_val
!= NULL
)
1961 value_free (bs
->old_val
);
1967 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1969 cleanup_executing_breakpoints (void *ignore
)
1971 executing_breakpoint_commands
= 0;
1974 /* Execute all the commands associated with all the breakpoints at this
1975 location. Any of these commands could cause the process to proceed
1976 beyond this point, etc. We look out for such changes by checking
1977 the global "breakpoint_proceeded" after each command. */
1980 bpstat_do_actions (bpstat
*bsp
)
1983 struct cleanup
*old_chain
;
1985 /* Avoid endless recursion if a `source' command is contained
1987 if (executing_breakpoint_commands
)
1990 executing_breakpoint_commands
= 1;
1991 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
1994 /* Note that (as of this writing), our callers all appear to
1995 be passing us the address of global stop_bpstat. And, if
1996 our calls to execute_control_command cause the inferior to
1997 proceed, that global (and hence, *bsp) will change.
1999 We must be careful to not touch *bsp unless the inferior
2000 has not proceeded. */
2002 /* This pointer will iterate over the list of bpstat's. */
2005 breakpoint_proceeded
= 0;
2006 for (; bs
!= NULL
; bs
= bs
->next
)
2008 struct command_line
*cmd
;
2009 struct cleanup
*this_cmd_tree_chain
;
2011 /* Take ownership of the BSP's command tree, if it has one.
2013 The command tree could legitimately contain commands like
2014 'step' and 'next', which call clear_proceed_status, which
2015 frees stop_bpstat's command tree. To make sure this doesn't
2016 free the tree we're executing out from under us, we need to
2017 take ownership of the tree ourselves. Since a given bpstat's
2018 commands are only executed once, we don't need to copy it; we
2019 can clear the pointer in the bpstat, and make sure we free
2020 the tree when we're done. */
2023 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2027 execute_control_command (cmd
);
2029 if (breakpoint_proceeded
)
2035 /* We can free this command tree now. */
2036 do_cleanups (this_cmd_tree_chain
);
2038 if (breakpoint_proceeded
)
2039 /* The inferior is proceeded by the command; bomb out now.
2040 The bpstat chain has been blown away by wait_for_inferior.
2041 But since execution has stopped again, there is a new bpstat
2042 to look at, so start over. */
2045 do_cleanups (old_chain
);
2048 /* This is the normal print function for a bpstat. In the future,
2049 much of this logic could (should?) be moved to bpstat_stop_status,
2050 by having it set different print_it values.
2052 Current scheme: When we stop, bpstat_print() is called. It loops
2053 through the bpstat list of things causing this stop, calling the
2054 print_bp_stop_message function on each one. The behavior of the
2055 print_bp_stop_message function depends on the print_it field of
2056 bpstat. If such field so indicates, call this function here.
2058 Return values from this routine (ultimately used by bpstat_print()
2059 and normal_stop() to decide what to do):
2060 PRINT_NOTHING: Means we already printed all we needed to print,
2061 don't print anything else.
2062 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2063 that something to be followed by a location.
2064 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2065 that something to be followed by a location.
2066 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2069 static enum print_stop_action
2070 print_it_typical (bpstat bs
)
2072 struct cleanup
*old_chain
, *ui_out_chain
;
2073 struct ui_stream
*stb
;
2074 stb
= ui_out_stream_new (uiout
);
2075 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2076 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2077 which has since been deleted. */
2078 if (bs
->breakpoint_at
== NULL
)
2079 return PRINT_UNKNOWN
;
2081 switch (bs
->breakpoint_at
->type
)
2084 case bp_hardware_breakpoint
:
2085 if (bs
->breakpoint_at
->loc
->address
!= bs
->breakpoint_at
->loc
->requested_address
)
2086 breakpoint_adjustment_warning (bs
->breakpoint_at
->loc
->requested_address
,
2087 bs
->breakpoint_at
->loc
->address
,
2088 bs
->breakpoint_at
->number
, 1);
2089 annotate_breakpoint (bs
->breakpoint_at
->number
);
2090 ui_out_text (uiout
, "\nBreakpoint ");
2091 if (ui_out_is_mi_like_p (uiout
))
2092 ui_out_field_string (uiout
, "reason", "breakpoint-hit");
2093 ui_out_field_int (uiout
, "bkptno", bs
->breakpoint_at
->number
);
2094 ui_out_text (uiout
, ", ");
2095 return PRINT_SRC_AND_LOC
;
2098 case bp_shlib_event
:
2099 /* Did we stop because the user set the stop_on_solib_events
2100 variable? (If so, we report this as a generic, "Stopped due
2101 to shlib event" message.) */
2102 printf_filtered ("Stopped due to shared library event\n");
2103 return PRINT_NOTHING
;
2106 case bp_thread_event
:
2107 /* Not sure how we will get here.
2108 GDB should not stop for these breakpoints. */
2109 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
2110 return PRINT_NOTHING
;
2113 case bp_overlay_event
:
2114 /* By analogy with the thread event, GDB should not stop for these. */
2115 printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n");
2116 return PRINT_NOTHING
;
2120 annotate_catchpoint (bs
->breakpoint_at
->number
);
2121 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2122 printf_filtered ("loaded");
2123 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2124 return PRINT_SRC_AND_LOC
;
2127 case bp_catch_unload
:
2128 annotate_catchpoint (bs
->breakpoint_at
->number
);
2129 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2130 printf_filtered ("unloaded");
2131 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2132 return PRINT_SRC_AND_LOC
;
2136 annotate_catchpoint (bs
->breakpoint_at
->number
);
2137 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2138 printf_filtered ("forked");
2139 printf_filtered (" process %d), ",
2140 bs
->breakpoint_at
->forked_inferior_pid
);
2141 return PRINT_SRC_AND_LOC
;
2144 case bp_catch_vfork
:
2145 annotate_catchpoint (bs
->breakpoint_at
->number
);
2146 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2147 printf_filtered ("vforked");
2148 printf_filtered (" process %d), ",
2149 bs
->breakpoint_at
->forked_inferior_pid
);
2150 return PRINT_SRC_AND_LOC
;
2154 annotate_catchpoint (bs
->breakpoint_at
->number
);
2155 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
2156 bs
->breakpoint_at
->number
,
2157 bs
->breakpoint_at
->exec_pathname
);
2158 return PRINT_SRC_AND_LOC
;
2161 case bp_catch_catch
:
2162 if (current_exception_event
&&
2163 (CURRENT_EXCEPTION_KIND
== EX_EVENT_CATCH
))
2165 annotate_catchpoint (bs
->breakpoint_at
->number
);
2166 printf_filtered ("\nCatchpoint %d (exception caught), ",
2167 bs
->breakpoint_at
->number
);
2168 printf_filtered ("throw location ");
2169 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2170 printf_filtered ("%s:%d",
2171 CURRENT_EXCEPTION_THROW_FILE
,
2172 CURRENT_EXCEPTION_THROW_LINE
);
2174 printf_filtered ("unknown");
2176 printf_filtered (", catch location ");
2177 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2178 printf_filtered ("%s:%d",
2179 CURRENT_EXCEPTION_CATCH_FILE
,
2180 CURRENT_EXCEPTION_CATCH_LINE
);
2182 printf_filtered ("unknown");
2184 printf_filtered ("\n");
2185 /* don't bother to print location frame info */
2186 return PRINT_SRC_ONLY
;
2190 /* really throw, some other bpstat will handle it */
2191 return PRINT_UNKNOWN
;
2195 case bp_catch_throw
:
2196 if (current_exception_event
&&
2197 (CURRENT_EXCEPTION_KIND
== EX_EVENT_THROW
))
2199 annotate_catchpoint (bs
->breakpoint_at
->number
);
2200 printf_filtered ("\nCatchpoint %d (exception thrown), ",
2201 bs
->breakpoint_at
->number
);
2202 printf_filtered ("throw location ");
2203 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2204 printf_filtered ("%s:%d",
2205 CURRENT_EXCEPTION_THROW_FILE
,
2206 CURRENT_EXCEPTION_THROW_LINE
);
2208 printf_filtered ("unknown");
2210 printf_filtered (", catch location ");
2211 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2212 printf_filtered ("%s:%d",
2213 CURRENT_EXCEPTION_CATCH_FILE
,
2214 CURRENT_EXCEPTION_CATCH_LINE
);
2216 printf_filtered ("unknown");
2218 printf_filtered ("\n");
2219 /* don't bother to print location frame info */
2220 return PRINT_SRC_ONLY
;
2224 /* really catch, some other bpstat will handle it */
2225 return PRINT_UNKNOWN
;
2230 case bp_hardware_watchpoint
:
2231 if (bs
->old_val
!= NULL
)
2233 annotate_watchpoint (bs
->breakpoint_at
->number
);
2234 if (ui_out_is_mi_like_p (uiout
))
2235 ui_out_field_string (uiout
, "reason", "watchpoint-trigger");
2236 mention (bs
->breakpoint_at
);
2237 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2238 ui_out_text (uiout
, "\nOld value = ");
2239 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2240 ui_out_field_stream (uiout
, "old", stb
);
2241 ui_out_text (uiout
, "\nNew value = ");
2242 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2243 ui_out_field_stream (uiout
, "new", stb
);
2244 do_cleanups (ui_out_chain
);
2245 ui_out_text (uiout
, "\n");
2246 value_free (bs
->old_val
);
2249 /* More than one watchpoint may have been triggered. */
2250 return PRINT_UNKNOWN
;
2253 case bp_read_watchpoint
:
2254 if (ui_out_is_mi_like_p (uiout
))
2255 ui_out_field_string (uiout
, "reason", "read-watchpoint-trigger");
2256 mention (bs
->breakpoint_at
);
2257 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2258 ui_out_text (uiout
, "\nValue = ");
2259 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2260 ui_out_field_stream (uiout
, "value", stb
);
2261 do_cleanups (ui_out_chain
);
2262 ui_out_text (uiout
, "\n");
2263 return PRINT_UNKNOWN
;
2266 case bp_access_watchpoint
:
2267 if (bs
->old_val
!= NULL
)
2269 annotate_watchpoint (bs
->breakpoint_at
->number
);
2270 if (ui_out_is_mi_like_p (uiout
))
2271 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2272 mention (bs
->breakpoint_at
);
2273 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2274 ui_out_text (uiout
, "\nOld value = ");
2275 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2276 ui_out_field_stream (uiout
, "old", stb
);
2277 value_free (bs
->old_val
);
2279 ui_out_text (uiout
, "\nNew value = ");
2283 mention (bs
->breakpoint_at
);
2284 if (ui_out_is_mi_like_p (uiout
))
2285 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2286 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2287 ui_out_text (uiout
, "\nValue = ");
2289 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0,Val_pretty_default
);
2290 ui_out_field_stream (uiout
, "new", stb
);
2291 do_cleanups (ui_out_chain
);
2292 ui_out_text (uiout
, "\n");
2293 return PRINT_UNKNOWN
;
2296 /* Fall through, we don't deal with these types of breakpoints
2300 if (ui_out_is_mi_like_p (uiout
))
2301 ui_out_field_string (uiout
, "reason", "function-finished");
2302 return PRINT_UNKNOWN
;
2306 if (ui_out_is_mi_like_p (uiout
))
2307 ui_out_field_string (uiout
, "reason", "location-reached");
2308 return PRINT_UNKNOWN
;
2313 case bp_longjmp_resume
:
2314 case bp_step_resume
:
2315 case bp_through_sigtramp
:
2316 case bp_watchpoint_scope
:
2319 return PRINT_UNKNOWN
;
2323 /* Generic routine for printing messages indicating why we
2324 stopped. The behavior of this function depends on the value
2325 'print_it' in the bpstat structure. Under some circumstances we
2326 may decide not to print anything here and delegate the task to
2329 static enum print_stop_action
2330 print_bp_stop_message (bpstat bs
)
2332 switch (bs
->print_it
)
2335 /* Nothing should be printed for this bpstat entry. */
2336 return PRINT_UNKNOWN
;
2340 /* We still want to print the frame, but we already printed the
2341 relevant messages. */
2342 return PRINT_SRC_AND_LOC
;
2345 case print_it_normal
:
2346 /* Normal case. Call the breakpoint's print_it method, or
2347 print_it_typical. */
2348 if (bs
->breakpoint_at
!= NULL
&& bs
->breakpoint_at
->ops
!= NULL
2349 && bs
->breakpoint_at
->ops
->print_it
!= NULL
)
2350 return bs
->breakpoint_at
->ops
->print_it (bs
->breakpoint_at
);
2352 return print_it_typical (bs
);
2356 internal_error (__FILE__
, __LINE__
,
2357 "print_bp_stop_message: unrecognized enum value");
2362 /* Print a message indicating what happened. This is called from
2363 normal_stop(). The input to this routine is the head of the bpstat
2364 list - a list of the eventpoints that caused this stop. This
2365 routine calls the generic print routine for printing a message
2366 about reasons for stopping. This will print (for example) the
2367 "Breakpoint n," part of the output. The return value of this
2370 PRINT_UNKNOWN: Means we printed nothing
2371 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2372 code to print the location. An example is
2373 "Breakpoint 1, " which should be followed by
2375 PRINT_SRC_ONLY: Means we printed something, but there is no need
2376 to also print the location part of the message.
2377 An example is the catch/throw messages, which
2378 don't require a location appended to the end.
2379 PRINT_NOTHING: We have done some printing and we don't need any
2380 further info to be printed.*/
2382 enum print_stop_action
2383 bpstat_print (bpstat bs
)
2387 /* Maybe another breakpoint in the chain caused us to stop.
2388 (Currently all watchpoints go on the bpstat whether hit or not.
2389 That probably could (should) be changed, provided care is taken
2390 with respect to bpstat_explains_signal). */
2391 for (; bs
; bs
= bs
->next
)
2393 val
= print_bp_stop_message (bs
);
2394 if (val
== PRINT_SRC_ONLY
2395 || val
== PRINT_SRC_AND_LOC
2396 || val
== PRINT_NOTHING
)
2400 /* We reached the end of the chain, or we got a null BS to start
2401 with and nothing was printed. */
2402 return PRINT_UNKNOWN
;
2405 /* Evaluate the expression EXP and return 1 if value is zero.
2406 This is used inside a catch_errors to evaluate the breakpoint condition.
2407 The argument is a "struct expression *" that has been cast to char * to
2408 make it pass through catch_errors. */
2411 breakpoint_cond_eval (void *exp
)
2413 struct value
*mark
= value_mark ();
2414 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2415 value_free_to_mark (mark
);
2419 /* Allocate a new bpstat and chain it to the current one. */
2422 bpstat_alloc (struct breakpoint
*b
, bpstat cbs
/* Current "bs" value */ )
2426 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2428 bs
->breakpoint_at
= b
;
2429 /* If the condition is false, etc., don't do the commands. */
2430 bs
->commands
= NULL
;
2432 bs
->print_it
= print_it_normal
;
2436 /* Possible return values for watchpoint_check (this can't be an enum
2437 because of check_errors). */
2438 /* The watchpoint has been deleted. */
2439 #define WP_DELETED 1
2440 /* The value has changed. */
2441 #define WP_VALUE_CHANGED 2
2442 /* The value has not changed. */
2443 #define WP_VALUE_NOT_CHANGED 3
2445 #define BP_TEMPFLAG 1
2446 #define BP_HARDWAREFLAG 2
2448 /* Check watchpoint condition. */
2451 watchpoint_check (void *p
)
2453 bpstat bs
= (bpstat
) p
;
2454 struct breakpoint
*b
;
2455 struct frame_info
*fr
;
2456 int within_current_scope
;
2458 b
= bs
->breakpoint_at
;
2460 if (b
->exp_valid_block
== NULL
)
2461 within_current_scope
= 1;
2464 /* There is no current frame at this moment. If we're going to have
2465 any chance of handling watchpoints on local variables, we'll need
2466 the frame chain (so we can determine if we're in scope). */
2467 reinit_frame_cache ();
2468 fr
= frame_find_by_id (b
->watchpoint_frame
);
2469 within_current_scope
= (fr
!= NULL
);
2470 /* in_function_epilogue_p() returns a non-zero value if we're still
2471 in the function but the stack frame has already been invalidated.
2472 Since we can't rely on the values of local variables after the
2473 stack has been destroyed, we are treating the watchpoint in that
2474 state as `not changed' without further checking.
2476 vinschen/2003-09-04: The former implementation left out the case
2477 that the watchpoint frame couldn't be found by frame_find_by_id()
2478 because the current PC is currently in an epilogue. Calling
2479 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2480 if ((!within_current_scope
|| fr
== get_current_frame ())
2481 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2482 return WP_VALUE_NOT_CHANGED
;
2483 if (fr
&& within_current_scope
)
2484 /* If we end up stopping, the current frame will get selected
2485 in normal_stop. So this call to select_frame won't affect
2490 if (within_current_scope
)
2492 /* We use value_{,free_to_}mark because it could be a
2493 *long* time before we return to the command level and
2494 call free_all_values. We can't call free_all_values because
2495 we might be in the middle of evaluating a function call. */
2497 struct value
*mark
= value_mark ();
2498 struct value
*new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
2499 if (!value_equal (b
->val
, new_val
))
2501 release_value (new_val
);
2502 value_free_to_mark (mark
);
2503 bs
->old_val
= b
->val
;
2505 /* We will stop here */
2506 return WP_VALUE_CHANGED
;
2510 /* Nothing changed, don't do anything. */
2511 value_free_to_mark (mark
);
2512 /* We won't stop here */
2513 return WP_VALUE_NOT_CHANGED
;
2518 /* This seems like the only logical thing to do because
2519 if we temporarily ignored the watchpoint, then when
2520 we reenter the block in which it is valid it contains
2521 garbage (in the case of a function, it may have two
2522 garbage values, one before and one after the prologue).
2523 So we can't even detect the first assignment to it and
2524 watch after that (since the garbage may or may not equal
2525 the first value assigned). */
2526 /* We print all the stop information in print_it_typical(), but
2527 in this case, by the time we call print_it_typical() this bp
2528 will be deleted already. So we have no choice but print the
2529 information here. */
2530 if (ui_out_is_mi_like_p (uiout
))
2531 ui_out_field_string (uiout
, "reason", "watchpoint-scope");
2532 ui_out_text (uiout
, "\nWatchpoint ");
2533 ui_out_field_int (uiout
, "wpnum", bs
->breakpoint_at
->number
);
2534 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2535 which its expression is valid.\n");
2537 if (b
->related_breakpoint
)
2538 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2539 b
->disposition
= disp_del_at_next_stop
;
2545 /* Get a bpstat associated with having just stopped at address
2546 BP_ADDR in thread PTID. STOPPED_BY_WATCHPOINT is 1 if the
2547 target thinks we stopped due to a hardware watchpoint, 0 if we
2548 know we did not trigger a hardware watchpoint, and -1 if we do not know. */
2550 /* Determine whether we stopped at a breakpoint, etc, or whether we
2551 don't understand this stop. Result is a chain of bpstat's such that:
2553 if we don't understand the stop, the result is a null pointer.
2555 if we understand why we stopped, the result is not null.
2557 Each element of the chain refers to a particular breakpoint or
2558 watchpoint at which we have stopped. (We may have stopped for
2559 several reasons concurrently.)
2561 Each element of the chain has valid next, breakpoint_at,
2562 commands, FIXME??? fields. */
2565 bpstat_stop_status (CORE_ADDR bp_addr
, ptid_t ptid
, int stopped_by_watchpoint
)
2567 struct breakpoint
*b
, *temp
;
2568 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2569 int real_breakpoint
= 0;
2570 /* Root of the chain of bpstat's */
2571 struct bpstats root_bs
[1];
2572 /* Pointer to the last thing in the chain currently. */
2573 bpstat bs
= root_bs
;
2574 int thread_id
= pid_to_thread_id (ptid
);
2576 ALL_BREAKPOINTS_SAFE (b
, temp
)
2578 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
2581 if (b
->type
!= bp_watchpoint
2582 && b
->type
!= bp_hardware_watchpoint
2583 && b
->type
!= bp_read_watchpoint
2584 && b
->type
!= bp_access_watchpoint
2585 && b
->type
!= bp_hardware_breakpoint
2586 && b
->type
!= bp_catch_fork
2587 && b
->type
!= bp_catch_vfork
2588 && b
->type
!= bp_catch_exec
2589 && b
->type
!= bp_catch_catch
2590 && b
->type
!= bp_catch_throw
) /* a non-watchpoint bp */
2592 if (b
->loc
->address
!= bp_addr
) /* address doesn't match */
2594 if (overlay_debugging
/* unmapped overlay section */
2595 && section_is_overlay (b
->loc
->section
)
2596 && !section_is_mapped (b
->loc
->section
))
2600 /* Continuable hardware watchpoints are treated as non-existent if the
2601 reason we stopped wasn't a hardware watchpoint (we didn't stop on
2602 some data address). Otherwise gdb won't stop on a break instruction
2603 in the code (not from a breakpoint) when a hardware watchpoint has
2606 if ((b
->type
== bp_hardware_watchpoint
2607 || b
->type
== bp_read_watchpoint
2608 || b
->type
== bp_access_watchpoint
)
2609 && !stopped_by_watchpoint
)
2612 if (b
->type
== bp_hardware_breakpoint
)
2614 if (b
->loc
->address
!= bp_addr
)
2616 if (overlay_debugging
/* unmapped overlay section */
2617 && section_is_overlay (b
->loc
->section
)
2618 && !section_is_mapped (b
->loc
->section
))
2622 /* Is this a catchpoint of a load or unload? If so, did we
2623 get a load or unload of the specified library? If not,
2625 if ((b
->type
== bp_catch_load
)
2626 #if defined(SOLIB_HAVE_LOAD_EVENT)
2627 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2628 || ((b
->dll_pathname
!= NULL
)
2629 && (strcmp (b
->dll_pathname
,
2630 SOLIB_LOADED_LIBRARY_PATHNAME (
2631 PIDGET (inferior_ptid
)))
2637 if ((b
->type
== bp_catch_unload
)
2638 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2639 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2640 || ((b
->dll_pathname
!= NULL
)
2641 && (strcmp (b
->dll_pathname
,
2642 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2643 PIDGET (inferior_ptid
)))
2649 if ((b
->type
== bp_catch_fork
)
2650 && !inferior_has_forked (PIDGET (inferior_ptid
),
2651 &b
->forked_inferior_pid
))
2654 if ((b
->type
== bp_catch_vfork
)
2655 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2656 &b
->forked_inferior_pid
))
2659 if ((b
->type
== bp_catch_exec
)
2660 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2663 if (ep_is_exception_catchpoint (b
) &&
2664 !(current_exception_event
= target_get_current_exception_event ()))
2667 /* Come here if it's a watchpoint, or if the break address matches */
2669 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
2671 /* Watchpoints may change this, if not found to have triggered. */
2675 if (b
->type
== bp_watchpoint
||
2676 b
->type
== bp_hardware_watchpoint
)
2678 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2680 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2681 int e
= catch_errors (watchpoint_check
, bs
, message
,
2683 do_cleanups (cleanups
);
2687 /* We've already printed what needs to be printed. */
2688 /* Actually this is superfluous, because by the time we
2689 call print_it_typical() the wp will be already deleted,
2690 and the function will return immediately. */
2691 bs
->print_it
= print_it_done
;
2694 case WP_VALUE_CHANGED
:
2698 case WP_VALUE_NOT_CHANGED
:
2700 bs
->print_it
= print_it_noop
;
2707 /* Error from catch_errors. */
2708 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2709 if (b
->related_breakpoint
)
2710 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2711 b
->disposition
= disp_del_at_next_stop
;
2712 /* We've already printed what needs to be printed. */
2713 bs
->print_it
= print_it_done
;
2719 else if (b
->type
== bp_read_watchpoint
||
2720 b
->type
== bp_access_watchpoint
)
2726 if (!target_stopped_data_address (¤t_target
, &addr
))
2728 for (v
= b
->val_chain
; v
; v
= v
->next
)
2730 if (VALUE_LVAL (v
) == lval_memory
2731 && ! VALUE_LAZY (v
))
2733 struct type
*vtype
= check_typedef (value_type (v
));
2735 if (v
== b
->val_chain
2736 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
2737 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
2741 vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
2742 /* Exact match not required. Within range is
2744 if (addr
>= vaddr
&&
2745 addr
< vaddr
+ TYPE_LENGTH (value_type (v
)))
2752 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2754 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2755 int e
= catch_errors (watchpoint_check
, bs
, message
,
2757 do_cleanups (cleanups
);
2761 /* We've already printed what needs to be printed. */
2762 bs
->print_it
= print_it_done
;
2765 case WP_VALUE_CHANGED
:
2766 if (b
->type
== bp_read_watchpoint
)
2768 /* Don't stop: read watchpoints shouldn't fire if
2769 the value has changed. This is for targets
2770 which cannot set read-only watchpoints. */
2771 bs
->print_it
= print_it_noop
;
2777 case WP_VALUE_NOT_CHANGED
:
2784 /* Error from catch_errors. */
2785 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2786 if (b
->related_breakpoint
)
2787 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2788 b
->disposition
= disp_del_at_next_stop
;
2789 /* We've already printed what needs to be printed. */
2790 bs
->print_it
= print_it_done
;
2794 else /* found == 0 */
2796 /* This is a case where some watchpoint(s) triggered,
2797 but not at the address of this watchpoint (FOUND
2798 was left zero). So don't print anything for this
2800 bs
->print_it
= print_it_noop
;
2807 /* By definition, an encountered breakpoint is a triggered
2811 real_breakpoint
= 1;
2814 if (frame_id_p (b
->frame_id
)
2815 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2819 int value_is_zero
= 0;
2823 /* Need to select the frame, with all that implies
2824 so that the conditions will have the right context. */
2825 select_frame (get_current_frame ());
2827 = catch_errors (breakpoint_cond_eval
, (b
->cond
),
2828 "Error in testing breakpoint condition:\n",
2830 /* FIXME-someday, should give breakpoint # */
2833 if (b
->cond
&& value_is_zero
)
2836 /* Don't consider this a hit. */
2839 else if (b
->thread
!= -1 && b
->thread
!= thread_id
)
2842 /* Don't consider this a hit. */
2845 else if (b
->ignore_count
> 0)
2848 annotate_ignore_count_change ();
2853 /* We will stop here */
2854 if (b
->disposition
== disp_disable
)
2855 b
->enable_state
= bp_disabled
;
2858 bs
->commands
= b
->commands
;
2860 (strcmp ("silent", bs
->commands
->line
) == 0
2861 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
2863 bs
->commands
= bs
->commands
->next
;
2866 bs
->commands
= copy_command_lines (bs
->commands
);
2869 /* Print nothing for this entry if we dont stop or if we dont print. */
2870 if (bs
->stop
== 0 || bs
->print
== 0)
2871 bs
->print_it
= print_it_noop
;
2874 bs
->next
= NULL
; /* Terminate the chain */
2875 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2877 /* The value of a hardware watchpoint hasn't changed, but the
2878 intermediate memory locations we are watching may have. */
2879 if (bs
&& !bs
->stop
&&
2880 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2881 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2882 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2884 remove_breakpoints ();
2885 insert_breakpoints ();
2890 /* Tell what to do about this bpstat. */
2892 bpstat_what (bpstat bs
)
2894 /* Classify each bpstat as one of the following. */
2897 /* This bpstat element has no effect on the main_action. */
2900 /* There was a watchpoint, stop but don't print. */
2903 /* There was a watchpoint, stop and print. */
2906 /* There was a breakpoint but we're not stopping. */
2909 /* There was a breakpoint, stop but don't print. */
2912 /* There was a breakpoint, stop and print. */
2915 /* We hit the longjmp breakpoint. */
2918 /* We hit the longjmp_resume breakpoint. */
2921 /* We hit the step_resume breakpoint. */
2924 /* We hit the through_sigtramp breakpoint. */
2927 /* We hit the shared library event breakpoint. */
2930 /* We caught a shared library event. */
2933 /* This is just used to count how many enums there are. */
2937 /* Here is the table which drives this routine. So that we can
2938 format it pretty, we define some abbreviations for the
2939 enum bpstat_what codes. */
2940 #define kc BPSTAT_WHAT_KEEP_CHECKING
2941 #define ss BPSTAT_WHAT_STOP_SILENT
2942 #define sn BPSTAT_WHAT_STOP_NOISY
2943 #define sgl BPSTAT_WHAT_SINGLE
2944 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2945 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2946 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2947 #define sr BPSTAT_WHAT_STEP_RESUME
2948 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2949 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2950 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2952 /* "Can't happen." Might want to print an error message.
2953 abort() is not out of the question, but chances are GDB is just
2954 a bit confused, not unusable. */
2955 #define err BPSTAT_WHAT_STOP_NOISY
2957 /* Given an old action and a class, come up with a new action. */
2958 /* One interesting property of this table is that wp_silent is the same
2959 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2960 after stopping, the check for whether to step over a breakpoint
2961 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2962 reference to how we stopped. We retain separate wp_silent and
2963 bp_silent codes in case we want to change that someday.
2965 Another possibly interesting property of this table is that
2966 there's a partial ordering, priority-like, of the actions. Once
2967 you've decided that some action is appropriate, you'll never go
2968 back and decide something of a lower priority is better. The
2971 kc < clr sgl shl shlr slr sn sr ss ts
2972 sgl < clrs shl shlr slr sn sr ss ts
2973 slr < err shl shlr sn sr ss ts
2974 clr < clrs err shl shlr sn sr ss ts
2975 clrs < err shl shlr sn sr ss ts
2976 ss < shl shlr sn sr ts
2983 What I think this means is that we don't need a damned table
2984 here. If you just put the rows and columns in the right order,
2985 it'd look awfully regular. We could simply walk the bpstat list
2986 and choose the highest priority action we find, with a little
2987 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
2988 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
2989 is messy anyway). */
2991 /* step_resume entries: a step resume breakpoint overrides another
2992 breakpoint of signal handling (see comment in wait_for_inferior
2993 at where we set the step_resume breakpoint). */
2994 /* We handle the through_sigtramp_breakpoint the same way; having both
2995 one of those and a step_resume_breakpoint is probably very rare (?). */
2997 static const enum bpstat_what_main_action
2998 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3001 /* kc ss sn sgl slr clr clrs sr ts shl shlr
3004 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, ts
, shl
, shlr
},
3006 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3008 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3010 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, ts
, shl
, shlr
},
3012 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3014 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3016 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, ts
, shl
, shlr
},
3018 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, ts
, shl
, shlr
},
3020 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, ts
, shl
, shlr
},
3022 {ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, shl
, shlr
},
3024 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, shl
, ts
, shl
, shlr
},
3026 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, ts
, shlr
, shlr
}
3041 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3042 struct bpstat_what retval
;
3044 retval
.call_dummy
= 0;
3045 for (; bs
!= NULL
; bs
= bs
->next
)
3047 enum class bs_class
= no_effect
;
3048 if (bs
->breakpoint_at
== NULL
)
3049 /* I suspect this can happen if it was a momentary breakpoint
3050 which has since been deleted. */
3052 switch (bs
->breakpoint_at
->type
)
3058 case bp_hardware_breakpoint
:
3064 bs_class
= bp_noisy
;
3066 bs_class
= bp_silent
;
3069 bs_class
= bp_nostop
;
3072 case bp_hardware_watchpoint
:
3073 case bp_read_watchpoint
:
3074 case bp_access_watchpoint
:
3078 bs_class
= wp_noisy
;
3080 bs_class
= wp_silent
;
3083 /* There was a watchpoint, but we're not stopping.
3084 This requires no further action. */
3085 bs_class
= no_effect
;
3088 bs_class
= long_jump
;
3090 case bp_longjmp_resume
:
3091 bs_class
= long_resume
;
3093 case bp_step_resume
:
3096 bs_class
= step_resume
;
3099 /* It is for the wrong frame. */
3100 bs_class
= bp_nostop
;
3102 case bp_through_sigtramp
:
3103 bs_class
= through_sig
;
3105 case bp_watchpoint_scope
:
3106 bs_class
= bp_nostop
;
3108 case bp_shlib_event
:
3109 bs_class
= shlib_event
;
3111 case bp_thread_event
:
3112 case bp_overlay_event
:
3113 bs_class
= bp_nostop
;
3116 case bp_catch_unload
:
3117 /* Only if this catchpoint triggered should we cause the
3118 step-out-of-dld behaviour. Otherwise, we ignore this
3121 bs_class
= catch_shlib_event
;
3123 bs_class
= no_effect
;
3126 case bp_catch_vfork
:
3131 bs_class
= bp_noisy
;
3133 bs_class
= bp_silent
;
3136 /* There was a catchpoint, but we're not stopping.
3137 This requires no further action. */
3138 bs_class
= no_effect
;
3140 case bp_catch_catch
:
3141 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
3142 bs_class
= bp_nostop
;
3144 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3146 case bp_catch_throw
:
3147 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
3148 bs_class
= bp_nostop
;
3150 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3153 /* Make sure the action is stop (silent or noisy),
3154 so infrun.c pops the dummy frame. */
3155 bs_class
= bp_silent
;
3156 retval
.call_dummy
= 1;
3159 current_action
= table
[(int) bs_class
][(int) current_action
];
3161 retval
.main_action
= current_action
;
3165 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3166 without hardware support). This isn't related to a specific bpstat,
3167 just to things like whether watchpoints are set. */
3170 bpstat_should_step (void)
3172 struct breakpoint
*b
;
3174 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
)
3179 /* Nonzero if there are enabled hardware watchpoints. */
3181 bpstat_have_active_hw_watchpoints (void)
3183 struct bp_location
*bpt
;
3184 ALL_BP_LOCATIONS (bpt
)
3185 if (breakpoint_enabled (bpt
->owner
)
3187 && bpt
->loc_type
== bp_loc_hardware_watchpoint
)
3193 /* Given a bpstat that records zero or more triggered eventpoints, this
3194 function returns another bpstat which contains only the catchpoints
3195 on that first list, if any. */
3197 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3199 struct bpstats root_bs
[1];
3200 bpstat bs
= root_bs
;
3201 struct breakpoint
*ep
;
3204 bpstat_clear (cp_list
);
3205 root_bs
->next
= NULL
;
3207 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3209 /* Is this eventpoint a catchpoint? If not, ignore it. */
3210 ep
= ep_list
->breakpoint_at
;
3213 if ((ep
->type
!= bp_catch_load
) &&
3214 (ep
->type
!= bp_catch_unload
) &&
3215 (ep
->type
!= bp_catch_catch
) &&
3216 (ep
->type
!= bp_catch_throw
))
3217 /* pai: (temp) ADD fork/vfork here!! */
3220 /* Yes; add it to the list. */
3221 bs
= bpstat_alloc (ep
, bs
);
3226 #if defined(SOLIB_ADD)
3227 /* Also, for each triggered catchpoint, tag it with the name of
3228 the library that caused this trigger. (We copy the name now,
3229 because it's only guaranteed to be available NOW, when the
3230 catchpoint triggers. Clients who may wish to know the name
3231 later must get it from the catchpoint itself.) */
3232 if (ep
->triggered_dll_pathname
!= NULL
)
3233 xfree (ep
->triggered_dll_pathname
);
3234 if (ep
->type
== bp_catch_load
)
3235 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3236 PIDGET (inferior_ptid
));
3238 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3239 PIDGET (inferior_ptid
));
3241 dll_pathname
= NULL
;
3245 ep
->triggered_dll_pathname
= (char *)
3246 xmalloc (strlen (dll_pathname
) + 1);
3247 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3250 ep
->triggered_dll_pathname
= NULL
;
3256 /* Print B to gdb_stdout. */
3258 print_one_breakpoint (struct breakpoint
*b
,
3259 CORE_ADDR
*last_addr
)
3261 struct command_line
*l
;
3263 struct ep_type_description
3268 static struct ep_type_description bptypes
[] =
3270 {bp_none
, "?deleted?"},
3271 {bp_breakpoint
, "breakpoint"},
3272 {bp_hardware_breakpoint
, "hw breakpoint"},
3273 {bp_until
, "until"},
3274 {bp_finish
, "finish"},
3275 {bp_watchpoint
, "watchpoint"},
3276 {bp_hardware_watchpoint
, "hw watchpoint"},
3277 {bp_read_watchpoint
, "read watchpoint"},
3278 {bp_access_watchpoint
, "acc watchpoint"},
3279 {bp_longjmp
, "longjmp"},
3280 {bp_longjmp_resume
, "longjmp resume"},
3281 {bp_step_resume
, "step resume"},
3282 {bp_through_sigtramp
, "sigtramp"},
3283 {bp_watchpoint_scope
, "watchpoint scope"},
3284 {bp_call_dummy
, "call dummy"},
3285 {bp_shlib_event
, "shlib events"},
3286 {bp_thread_event
, "thread events"},
3287 {bp_overlay_event
, "overlay events"},
3288 {bp_catch_load
, "catch load"},
3289 {bp_catch_unload
, "catch unload"},
3290 {bp_catch_fork
, "catch fork"},
3291 {bp_catch_vfork
, "catch vfork"},
3292 {bp_catch_exec
, "catch exec"},
3293 {bp_catch_catch
, "catch catch"},
3294 {bp_catch_throw
, "catch throw"}
3297 static char *bpdisps
[] =
3298 {"del", "dstp", "dis", "keep"};
3299 static char bpenables
[] = "nynny";
3300 char wrap_indent
[80];
3301 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3302 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3303 struct cleanup
*bkpt_chain
;
3306 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3310 ui_out_field_int (uiout
, "number", b
->number
);
3314 if (((int) b
->type
> (sizeof (bptypes
) / sizeof (bptypes
[0])))
3315 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3316 internal_error (__FILE__
, __LINE__
,
3317 "bptypes table does not describe type #%d.",
3319 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3323 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3327 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3328 ui_out_spaces (uiout
, 2);
3331 strcpy (wrap_indent
, " ");
3334 if (TARGET_ADDR_BIT
<= 32)
3335 strcat (wrap_indent
, " ");
3337 strcat (wrap_indent
, " ");
3340 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3341 b
->ops
->print_one (b
, last_addr
);
3346 internal_error (__FILE__
, __LINE__
,
3347 "print_one_breakpoint: bp_none encountered\n");
3351 case bp_hardware_watchpoint
:
3352 case bp_read_watchpoint
:
3353 case bp_access_watchpoint
:
3354 /* Field 4, the address, is omitted (which makes the columns
3355 not line up too nicely with the headers, but the effect
3356 is relatively readable). */
3358 ui_out_field_skip (uiout
, "addr");
3360 print_expression (b
->exp
, stb
->stream
);
3361 ui_out_field_stream (uiout
, "what", stb
);
3365 case bp_catch_unload
:
3366 /* Field 4, the address, is omitted (which makes the columns
3367 not line up too nicely with the headers, but the effect
3368 is relatively readable). */
3370 ui_out_field_skip (uiout
, "addr");
3372 if (b
->dll_pathname
== NULL
)
3374 ui_out_field_string (uiout
, "what", "<any library>");
3375 ui_out_spaces (uiout
, 1);
3379 ui_out_text (uiout
, "library \"");
3380 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3381 ui_out_text (uiout
, "\" ");
3386 case bp_catch_vfork
:
3387 /* Field 4, the address, is omitted (which makes the columns
3388 not line up too nicely with the headers, but the effect
3389 is relatively readable). */
3391 ui_out_field_skip (uiout
, "addr");
3393 if (b
->forked_inferior_pid
!= 0)
3395 ui_out_text (uiout
, "process ");
3396 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3397 ui_out_spaces (uiout
, 1);
3401 /* Field 4, the address, is omitted (which makes the columns
3402 not line up too nicely with the headers, but the effect
3403 is relatively readable). */
3405 ui_out_field_skip (uiout
, "addr");
3407 if (b
->exec_pathname
!= NULL
)
3409 ui_out_text (uiout
, "program \"");
3410 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3411 ui_out_text (uiout
, "\" ");
3415 case bp_catch_catch
:
3416 /* Field 4, the address, is omitted (which makes the columns
3417 not line up too nicely with the headers, but the effect
3418 is relatively readable). */
3420 ui_out_field_skip (uiout
, "addr");
3422 ui_out_field_string (uiout
, "what", "exception catch");
3423 ui_out_spaces (uiout
, 1);
3426 case bp_catch_throw
:
3427 /* Field 4, the address, is omitted (which makes the columns
3428 not line up too nicely with the headers, but the effect
3429 is relatively readable). */
3431 ui_out_field_skip (uiout
, "addr");
3433 ui_out_field_string (uiout
, "what", "exception throw");
3434 ui_out_spaces (uiout
, 1);
3438 case bp_hardware_breakpoint
:
3442 case bp_longjmp_resume
:
3443 case bp_step_resume
:
3444 case bp_through_sigtramp
:
3445 case bp_watchpoint_scope
:
3447 case bp_shlib_event
:
3448 case bp_thread_event
:
3449 case bp_overlay_event
:
3454 ui_out_field_string (uiout
, "addr", "<PENDING>");
3456 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
3459 *last_addr
= b
->loc
->address
;
3462 sym
= find_pc_sect_function (b
->loc
->address
, b
->loc
->section
);
3465 ui_out_text (uiout
, "in ");
3466 ui_out_field_string (uiout
, "func",
3467 SYMBOL_PRINT_NAME (sym
));
3468 ui_out_wrap_hint (uiout
, wrap_indent
);
3469 ui_out_text (uiout
, " at ");
3471 ui_out_field_string (uiout
, "file", b
->source_file
);
3472 ui_out_text (uiout
, ":");
3473 ui_out_field_int (uiout
, "line", b
->line_number
);
3475 else if (b
->pending
)
3477 ui_out_field_string (uiout
, "pending", b
->addr_string
);
3481 print_address_symbolic (b
->loc
->address
, stb
->stream
, demangle
, "");
3482 ui_out_field_stream (uiout
, "at", stb
);
3487 if (b
->thread
!= -1)
3489 /* FIXME: This seems to be redundant and lost here; see the
3490 "stop only in" line a little further down. */
3491 ui_out_text (uiout
, " thread ");
3492 ui_out_field_int (uiout
, "thread", b
->thread
);
3495 ui_out_text (uiout
, "\n");
3497 if (frame_id_p (b
->frame_id
))
3500 ui_out_text (uiout
, "\tstop only in stack frame at ");
3501 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3503 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3504 ui_out_text (uiout
, "\n");
3510 ui_out_text (uiout
, "\tstop only if ");
3511 print_expression (b
->cond
, stb
->stream
);
3512 ui_out_field_stream (uiout
, "cond", stb
);
3513 ui_out_text (uiout
, "\n");
3516 if (b
->pending
&& b
->cond_string
)
3519 ui_out_text (uiout
, "\tstop only if ");
3520 ui_out_field_string (uiout
, "cond", b
->cond_string
);
3521 ui_out_text (uiout
, "\n");
3524 if (b
->thread
!= -1)
3526 /* FIXME should make an annotation for this */
3527 ui_out_text (uiout
, "\tstop only in thread ");
3528 ui_out_field_int (uiout
, "thread", b
->thread
);
3529 ui_out_text (uiout
, "\n");
3532 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3534 /* FIXME should make an annotation for this */
3535 if (ep_is_catchpoint (b
))
3536 ui_out_text (uiout
, "\tcatchpoint");
3538 ui_out_text (uiout
, "\tbreakpoint");
3539 ui_out_text (uiout
, " already hit ");
3540 ui_out_field_int (uiout
, "times", b
->hit_count
);
3541 if (b
->hit_count
== 1)
3542 ui_out_text (uiout
, " time\n");
3544 ui_out_text (uiout
, " times\n");
3547 /* Output the count also if it is zero, but only if this is
3548 mi. FIXME: Should have a better test for this. */
3549 if (ui_out_is_mi_like_p (uiout
))
3550 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3551 ui_out_field_int (uiout
, "times", b
->hit_count
);
3553 if (b
->ignore_count
)
3556 ui_out_text (uiout
, "\tignore next ");
3557 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3558 ui_out_text (uiout
, " hits\n");
3561 if ((l
= b
->commands
))
3563 struct cleanup
*script_chain
;
3566 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3567 print_command_lines (uiout
, l
, 4);
3568 do_cleanups (script_chain
);
3570 do_cleanups (bkpt_chain
);
3571 do_cleanups (old_chain
);
3574 struct captured_breakpoint_query_args
3580 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3582 struct captured_breakpoint_query_args
*args
= data
;
3583 struct breakpoint
*b
;
3584 CORE_ADDR dummy_addr
= 0;
3587 if (args
->bnum
== b
->number
)
3589 print_one_breakpoint (b
, &dummy_addr
);
3597 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
, char **error_message
)
3599 struct captured_breakpoint_query_args args
;
3601 /* For the moment we don't trust print_one_breakpoint() to not throw
3603 return catch_exceptions_with_msg (uiout
, do_captured_breakpoint_query
, &args
,
3604 error_message
, RETURN_MASK_ALL
);
3607 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3608 catchpoints, et.al.). */
3611 user_settable_breakpoint (const struct breakpoint
*b
)
3613 return (b
->type
== bp_breakpoint
3614 || b
->type
== bp_catch_load
3615 || b
->type
== bp_catch_unload
3616 || b
->type
== bp_catch_fork
3617 || b
->type
== bp_catch_vfork
3618 || b
->type
== bp_catch_exec
3619 || b
->type
== bp_catch_catch
3620 || b
->type
== bp_catch_throw
3621 || b
->type
== bp_hardware_breakpoint
3622 || b
->type
== bp_watchpoint
3623 || b
->type
== bp_read_watchpoint
3624 || b
->type
== bp_access_watchpoint
3625 || b
->type
== bp_hardware_watchpoint
);
3628 /* Print information on user settable breakpoint (watchpoint, etc)
3629 number BNUM. If BNUM is -1 print all user settable breakpoints.
3630 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3633 breakpoint_1 (int bnum
, int allflag
)
3635 struct breakpoint
*b
;
3636 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3637 int nr_printable_breakpoints
;
3638 struct cleanup
*bkpttbl_chain
;
3640 /* Compute the number of rows in the table. */
3641 nr_printable_breakpoints
= 0;
3644 || bnum
== b
->number
)
3646 if (allflag
|| user_settable_breakpoint (b
))
3647 nr_printable_breakpoints
++;
3652 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3656 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3659 if (nr_printable_breakpoints
> 0)
3660 annotate_breakpoints_headers ();
3661 if (nr_printable_breakpoints
> 0)
3663 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3664 if (nr_printable_breakpoints
> 0)
3666 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3667 if (nr_printable_breakpoints
> 0)
3669 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3670 if (nr_printable_breakpoints
> 0)
3672 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3675 if (nr_printable_breakpoints
> 0)
3677 if (TARGET_ADDR_BIT
<= 32)
3678 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3680 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3682 if (nr_printable_breakpoints
> 0)
3684 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3685 ui_out_table_body (uiout
);
3686 if (nr_printable_breakpoints
> 0)
3687 annotate_breakpoints_table ();
3691 || bnum
== b
->number
)
3693 /* We only print out user settable breakpoints unless the
3695 if (allflag
|| user_settable_breakpoint (b
))
3696 print_one_breakpoint (b
, &last_addr
);
3699 do_cleanups (bkpttbl_chain
);
3701 if (nr_printable_breakpoints
== 0)
3704 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3706 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3711 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3712 that a comparison of an unsigned with -1 is always false. */
3713 if (last_addr
!= (CORE_ADDR
) -1)
3714 set_next_address (last_addr
);
3717 /* FIXME? Should this be moved up so that it is only called when
3718 there have been breakpoints? */
3719 annotate_breakpoints_table_end ();
3723 breakpoints_info (char *bnum_exp
, int from_tty
)
3728 bnum
= parse_and_eval_long (bnum_exp
);
3730 breakpoint_1 (bnum
, 0);
3734 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3739 bnum
= parse_and_eval_long (bnum_exp
);
3741 breakpoint_1 (bnum
, 1);
3744 /* Print a message describing any breakpoints set at PC. */
3747 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
)
3750 struct breakpoint
*b
;
3753 if (b
->loc
->address
== pc
) /* address match / overlay match */
3754 if (!b
->pending
&& (!overlay_debugging
|| b
->loc
->section
== section
))
3758 printf_filtered ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
3760 if (b
->loc
->address
== pc
) /* address match / overlay match */
3761 if (!b
->pending
&& (!overlay_debugging
|| b
->loc
->section
== section
))
3764 printf_filtered ("%d%s%s ",
3766 ((b
->enable_state
== bp_disabled
||
3767 b
->enable_state
== bp_shlib_disabled
||
3768 b
->enable_state
== bp_call_disabled
)
3770 : b
->enable_state
== bp_permanent
3774 : ((others
== 1) ? " and" : ""));
3776 printf_filtered ("also set at pc ");
3777 print_address_numeric (pc
, 1, gdb_stdout
);
3778 printf_filtered (".\n");
3782 /* Set the default place to put a breakpoint
3783 for the `break' command with no arguments. */
3786 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3789 default_breakpoint_valid
= valid
;
3790 default_breakpoint_address
= addr
;
3791 default_breakpoint_symtab
= symtab
;
3792 default_breakpoint_line
= line
;
3795 /* Return true iff it is meaningful to use the address member of
3796 BPT. For some breakpoint types, the address member is irrelevant
3797 and it makes no sense to attempt to compare it to other addresses
3798 (or use it for any other purpose either).
3800 More specifically, each of the following breakpoint types will always
3801 have a zero valued address and we don't want check_duplicates() to mark
3802 breakpoints of any of these types to be a duplicate of an actual
3803 breakpoint at address zero:
3806 bp_hardware_watchpoint
3808 bp_access_watchpoint
3815 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3817 enum bptype type
= bpt
->type
;
3819 return (type
!= bp_watchpoint
3820 && type
!= bp_hardware_watchpoint
3821 && type
!= bp_read_watchpoint
3822 && type
!= bp_access_watchpoint
3823 && type
!= bp_catch_exec
3824 && type
!= bp_longjmp_resume
3825 && type
!= bp_catch_fork
3826 && type
!= bp_catch_vfork
);
3829 /* Rescan breakpoints at the same address and section as BPT,
3830 marking the first one as "first" and any others as "duplicates".
3831 This is so that the bpt instruction is only inserted once.
3832 If we have a permanent breakpoint at the same place as BPT, make
3833 that one the official one, and the rest as duplicates. */
3836 check_duplicates (struct breakpoint
*bpt
)
3838 struct bp_location
*b
;
3840 struct bp_location
*perm_bp
= 0;
3841 CORE_ADDR address
= bpt
->loc
->address
;
3842 asection
*section
= bpt
->loc
->section
;
3844 if (! breakpoint_address_is_meaningful (bpt
))
3847 ALL_BP_LOCATIONS (b
)
3848 if (b
->owner
->enable_state
!= bp_disabled
3849 && b
->owner
->enable_state
!= bp_shlib_disabled
3850 && !b
->owner
->pending
3851 && b
->owner
->enable_state
!= bp_call_disabled
3852 && b
->address
== address
/* address / overlay match */
3853 && (!overlay_debugging
|| b
->section
== section
)
3854 && breakpoint_address_is_meaningful (b
->owner
))
3856 /* Have we found a permanent breakpoint? */
3857 if (b
->owner
->enable_state
== bp_permanent
)
3864 b
->duplicate
= count
> 1;
3867 /* If we found a permanent breakpoint at this address, go over the
3868 list again and declare all the other breakpoints there to be the
3872 perm_bp
->duplicate
= 0;
3874 /* Permanent breakpoint should always be inserted. */
3875 if (! perm_bp
->inserted
)
3876 internal_error (__FILE__
, __LINE__
,
3877 "allegedly permanent breakpoint is not "
3878 "actually inserted");
3880 ALL_BP_LOCATIONS (b
)
3883 if (b
->owner
->enable_state
!= bp_disabled
3884 && b
->owner
->enable_state
!= bp_shlib_disabled
3885 && !b
->owner
->pending
3886 && b
->owner
->enable_state
!= bp_call_disabled
3887 && b
->address
== address
/* address / overlay match */
3888 && (!overlay_debugging
|| b
->section
== section
)
3889 && breakpoint_address_is_meaningful (b
->owner
))
3892 internal_error (__FILE__
, __LINE__
,
3893 "another breakpoint was inserted on top of "
3894 "a permanent breakpoint");
3903 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
3904 int bnum
, int have_bnum
)
3909 strcpy (astr1
, hex_string_custom ((unsigned long) from_addr
, 8));
3910 strcpy (astr2
, hex_string_custom ((unsigned long) to_addr
, 8));
3912 warning ("Breakpoint %d address previously adjusted from %s to %s.",
3913 bnum
, astr1
, astr2
);
3915 warning ("Breakpoint address adjusted from %s to %s.", astr1
, astr2
);
3918 /* Adjust a breakpoint's address to account for architectural constraints
3919 on breakpoint placement. Return the adjusted address. Note: Very
3920 few targets require this kind of adjustment. For most targets,
3921 this function is simply the identity function. */
3924 adjust_breakpoint_address (CORE_ADDR bpaddr
, enum bptype bptype
)
3926 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
3928 /* Very few targets need any kind of breakpoint adjustment. */
3931 else if (bptype
== bp_watchpoint
3932 || bptype
== bp_hardware_watchpoint
3933 || bptype
== bp_read_watchpoint
3934 || bptype
== bp_access_watchpoint
3935 || bptype
== bp_catch_fork
3936 || bptype
== bp_catch_vfork
3937 || bptype
== bp_catch_exec
)
3939 /* Watchpoints and the various bp_catch_* eventpoints should not
3940 have their addresses modified. */
3945 CORE_ADDR adjusted_bpaddr
;
3947 /* Some targets have architectural constraints on the placement
3948 of breakpoint instructions. Obtain the adjusted address. */
3949 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
3952 /* An adjusted breakpoint address can significantly alter
3953 a user's expectations. Print a warning if an adjustment
3955 if (adjusted_bpaddr
!= bpaddr
)
3956 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
3958 return adjusted_bpaddr
;
3962 /* Allocate a struct bp_location. */
3964 static struct bp_location
*
3965 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
)
3967 struct bp_location
*loc
, *loc_p
;
3969 loc
= xmalloc (sizeof (struct bp_location
));
3970 memset (loc
, 0, sizeof (*loc
));
3980 case bp_longjmp_resume
:
3981 case bp_step_resume
:
3982 case bp_through_sigtramp
:
3983 case bp_watchpoint_scope
:
3985 case bp_shlib_event
:
3986 case bp_thread_event
:
3987 case bp_overlay_event
:
3989 case bp_catch_unload
:
3990 loc
->loc_type
= bp_loc_software_breakpoint
;
3992 case bp_hardware_breakpoint
:
3993 loc
->loc_type
= bp_loc_hardware_breakpoint
;
3995 case bp_hardware_watchpoint
:
3996 case bp_read_watchpoint
:
3997 case bp_access_watchpoint
:
3998 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4002 case bp_catch_vfork
:
4004 case bp_catch_catch
:
4005 case bp_catch_throw
:
4006 loc
->loc_type
= bp_loc_other
;
4009 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
4012 /* Add this breakpoint to the end of the chain. */
4014 loc_p
= bp_location_chain
;
4016 bp_location_chain
= loc
;
4020 loc_p
= loc_p
->next
;
4027 /* set_raw_breakpoint() is a low level routine for allocating and
4028 partially initializing a breakpoint of type BPTYPE. The newly
4029 created breakpoint's address, section, source file name, and line
4030 number are provided by SAL. The newly created and partially
4031 initialized breakpoint is added to the breakpoint chain and
4032 is also returned as the value of this function.
4034 It is expected that the caller will complete the initialization of
4035 the newly created breakpoint struct as well as output any status
4036 information regarding the creation of a new breakpoint. In
4037 particular, set_raw_breakpoint() does NOT set the breakpoint
4038 number! Care should be taken to not allow an error() to occur
4039 prior to completing the initialization of the breakpoint. If this
4040 should happen, a bogus breakpoint will be left on the chain. */
4043 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4045 struct breakpoint
*b
, *b1
;
4047 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4048 memset (b
, 0, sizeof (*b
));
4049 b
->loc
= allocate_bp_location (b
, bptype
);
4050 b
->loc
->requested_address
= sal
.pc
;
4051 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
,
4053 if (sal
.symtab
== NULL
)
4054 b
->source_file
= NULL
;
4056 b
->source_file
= savestring (sal
.symtab
->filename
,
4057 strlen (sal
.symtab
->filename
));
4058 b
->loc
->section
= sal
.section
;
4060 b
->language
= current_language
->la_language
;
4061 b
->input_radix
= input_radix
;
4063 b
->line_number
= sal
.line
;
4064 b
->enable_state
= bp_enabled
;
4067 b
->ignore_count
= 0;
4069 b
->frame_id
= null_frame_id
;
4070 b
->dll_pathname
= NULL
;
4071 b
->triggered_dll_pathname
= NULL
;
4072 b
->forked_inferior_pid
= 0;
4073 b
->exec_pathname
= NULL
;
4077 /* Add this breakpoint to the end of the chain
4078 so that a list of breakpoints will come out in order
4079 of increasing numbers. */
4081 b1
= breakpoint_chain
;
4083 breakpoint_chain
= b
;
4091 check_duplicates (b
);
4092 breakpoints_changed ();
4098 /* Note that the breakpoint object B describes a permanent breakpoint
4099 instruction, hard-wired into the inferior's code. */
4101 make_breakpoint_permanent (struct breakpoint
*b
)
4103 b
->enable_state
= bp_permanent
;
4105 /* By definition, permanent breakpoints are already present in the code. */
4106 b
->loc
->inserted
= 1;
4109 static struct breakpoint
*
4110 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4112 static int internal_breakpoint_number
= -1;
4113 struct symtab_and_line sal
;
4114 struct breakpoint
*b
;
4116 init_sal (&sal
); /* initialize to zeroes */
4119 sal
.section
= find_pc_overlay (sal
.pc
);
4121 b
= set_raw_breakpoint (sal
, type
);
4122 b
->number
= internal_breakpoint_number
--;
4123 b
->disposition
= disp_donttouch
;
4130 create_longjmp_breakpoint (char *func_name
)
4132 struct breakpoint
*b
;
4133 struct minimal_symbol
*m
;
4135 if (func_name
== NULL
)
4136 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
4139 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4142 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4145 b
->enable_state
= bp_disabled
;
4148 b
->addr_string
= xstrdup (func_name
);
4151 /* Call this routine when stepping and nexting to enable a breakpoint
4152 if we do a longjmp(). When we hit that breakpoint, call
4153 set_longjmp_resume_breakpoint() to figure out where we are going. */
4156 enable_longjmp_breakpoint (void)
4158 struct breakpoint
*b
;
4161 if (b
->type
== bp_longjmp
)
4163 b
->enable_state
= bp_enabled
;
4164 check_duplicates (b
);
4169 disable_longjmp_breakpoint (void)
4171 struct breakpoint
*b
;
4174 if (b
->type
== bp_longjmp
4175 || b
->type
== bp_longjmp_resume
)
4177 b
->enable_state
= bp_disabled
;
4178 check_duplicates (b
);
4183 create_overlay_event_breakpoint (char *func_name
)
4185 struct breakpoint
*b
;
4186 struct minimal_symbol
*m
;
4188 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4191 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4193 b
->addr_string
= xstrdup (func_name
);
4195 if (overlay_debugging
== ovly_auto
)
4197 b
->enable_state
= bp_enabled
;
4198 overlay_events_enabled
= 1;
4202 b
->enable_state
= bp_disabled
;
4203 overlay_events_enabled
= 0;
4208 enable_overlay_breakpoints (void)
4210 struct breakpoint
*b
;
4213 if (b
->type
== bp_overlay_event
)
4215 b
->enable_state
= bp_enabled
;
4216 check_duplicates (b
);
4217 overlay_events_enabled
= 1;
4222 disable_overlay_breakpoints (void)
4224 struct breakpoint
*b
;
4227 if (b
->type
== bp_overlay_event
)
4229 b
->enable_state
= bp_disabled
;
4230 check_duplicates (b
);
4231 overlay_events_enabled
= 0;
4236 create_thread_event_breakpoint (CORE_ADDR address
)
4238 struct breakpoint
*b
;
4240 b
= create_internal_breakpoint (address
, bp_thread_event
);
4242 b
->enable_state
= bp_enabled
;
4243 /* addr_string has to be used or breakpoint_re_set will delete me. */
4244 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4250 remove_thread_event_breakpoints (void)
4252 struct breakpoint
*b
, *temp
;
4254 ALL_BREAKPOINTS_SAFE (b
, temp
)
4255 if (b
->type
== bp_thread_event
)
4256 delete_breakpoint (b
);
4259 struct captured_parse_breakpoint_args
4262 struct symtabs_and_lines
*sals_p
;
4263 char ***addr_string_p
;
4267 struct lang_and_radix
4273 /* Cleanup helper routine to restore the current language and
4276 do_restore_lang_radix_cleanup (void *old
)
4278 struct lang_and_radix
*p
= old
;
4279 set_language (p
->lang
);
4280 input_radix
= p
->radix
;
4283 /* Try and resolve a pending breakpoint. */
4285 resolve_pending_breakpoint (struct breakpoint
*b
)
4287 /* Try and reparse the breakpoint in case the shared library
4289 struct symtabs_and_lines sals
;
4290 struct symtab_and_line pending_sal
;
4291 char **cond_string
= (char **) NULL
;
4292 char *copy_arg
= b
->addr_string
;
4297 struct ui_file
*old_gdb_stderr
;
4298 struct lang_and_radix old_lr
;
4299 struct cleanup
*old_chain
;
4301 /* Set language, input-radix, then reissue breakpoint command.
4302 Ensure the language and input-radix are restored afterwards. */
4303 old_lr
.lang
= current_language
->la_language
;
4304 old_lr
.radix
= input_radix
;
4305 old_chain
= make_cleanup (do_restore_lang_radix_cleanup
, &old_lr
);
4307 set_language (b
->language
);
4308 input_radix
= b
->input_radix
;
4309 rc
= break_command_1 (b
->addr_string
, b
->flag
, b
->from_tty
, b
);
4311 if (rc
== GDB_RC_OK
)
4312 /* Pending breakpoint has been resolved. */
4313 printf_filtered ("Pending breakpoint \"%s\" resolved\n", b
->addr_string
);
4315 do_cleanups (old_chain
);
4321 remove_solib_event_breakpoints (void)
4323 struct breakpoint
*b
, *temp
;
4325 ALL_BREAKPOINTS_SAFE (b
, temp
)
4326 if (b
->type
== bp_shlib_event
)
4327 delete_breakpoint (b
);
4331 create_solib_event_breakpoint (CORE_ADDR address
)
4333 struct breakpoint
*b
;
4335 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4339 /* Disable any breakpoints that are on code in shared libraries. Only
4340 apply to enabled breakpoints, disabled ones can just stay disabled. */
4343 disable_breakpoints_in_shlibs (int silent
)
4345 struct breakpoint
*b
;
4346 int disabled_shlib_breaks
= 0;
4348 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4351 #if defined (PC_SOLIB)
4352 if (((b
->type
== bp_breakpoint
) ||
4353 (b
->type
== bp_hardware_breakpoint
)) &&
4354 breakpoint_enabled (b
) &&
4355 !b
->loc
->duplicate
&&
4356 PC_SOLIB (b
->loc
->address
))
4358 b
->enable_state
= bp_shlib_disabled
;
4361 if (!disabled_shlib_breaks
)
4363 target_terminal_ours_for_output ();
4364 warning ("Temporarily disabling shared library breakpoints:");
4366 disabled_shlib_breaks
= 1;
4367 warning ("breakpoint #%d ", b
->number
);
4374 /* Disable any breakpoints that are in in an unloaded shared library. Only
4375 apply to enabled breakpoints, disabled ones can just stay disabled. */
4378 disable_breakpoints_in_unloaded_shlib (struct so_list
*solib
)
4380 struct breakpoint
*b
;
4381 int disabled_shlib_breaks
= 0;
4383 #if defined (PC_SOLIB)
4384 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4387 if ((b
->loc
->loc_type
== bp_loc_hardware_breakpoint
4388 || b
->loc
->loc_type
== bp_loc_software_breakpoint
)
4389 && breakpoint_enabled (b
)
4390 && !b
->loc
->duplicate
)
4392 char *so_name
= PC_SOLIB (b
->loc
->address
);
4394 && !strcmp (so_name
, solib
->so_name
))
4396 b
->enable_state
= bp_shlib_disabled
;
4397 /* At this point, we cannot rely on remove_breakpoint
4398 succeeding so we must mark the breakpoint as not inserted
4399 to prevent future errors occurring in remove_breakpoints. */
4400 b
->loc
->inserted
= 0;
4401 if (!disabled_shlib_breaks
)
4403 target_terminal_ours_for_output ();
4404 warning ("Temporarily disabling breakpoints for unloaded shared library \"%s\"",
4407 disabled_shlib_breaks
= 1;
4414 /* Try to reenable any breakpoints in shared libraries. */
4416 re_enable_breakpoints_in_shlibs (void)
4418 struct breakpoint
*b
, *tmp
;
4420 ALL_BREAKPOINTS_SAFE (b
, tmp
)
4422 if (b
->enable_state
== bp_shlib_disabled
)
4426 /* Do not reenable the breakpoint if the shared library
4427 is still not mapped in. */
4428 lib
= PC_SOLIB (b
->loc
->address
);
4429 if (lib
!= NULL
&& target_read_memory (b
->loc
->address
, buf
, 1) == 0)
4430 b
->enable_state
= bp_enabled
;
4432 else if (b
->pending
&& (b
->enable_state
== bp_enabled
))
4434 if (resolve_pending_breakpoint (b
) == GDB_RC_OK
)
4435 delete_breakpoint (b
);
4443 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
4444 char *cond_string
, enum bptype bp_kind
)
4446 struct breakpoint
*b
;
4447 struct symtabs_and_lines sals
;
4448 struct cleanup
*old_chain
;
4449 struct cleanup
*canonical_strings_chain
= NULL
;
4450 char *addr_start
= hookname
;
4451 char *addr_end
= NULL
;
4452 char **canonical
= (char **) NULL
;
4453 int thread
= -1; /* All threads. */
4455 /* Set a breakpoint on the specified hook. */
4456 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
,
4457 0, &canonical
, NULL
);
4458 addr_end
= hookname
;
4460 if (sals
.nelts
== 0)
4462 warning ("Unable to set a breakpoint on dynamic linker callback.");
4463 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4464 warning ("GDB will be unable to track shl_load/shl_unload calls");
4467 if (sals
.nelts
!= 1)
4469 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4470 warning ("GDB will be unable to track shl_load/shl_unload calls");
4474 /* Make sure that all storage allocated in decode_line_1 gets freed
4475 in case the following errors out. */
4476 old_chain
= make_cleanup (xfree
, sals
.sals
);
4477 if (canonical
!= (char **) NULL
)
4479 make_cleanup (xfree
, canonical
);
4480 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
4481 if (canonical
[0] != NULL
)
4482 make_cleanup (xfree
, canonical
[0]);
4485 resolve_sal_pc (&sals
.sals
[0]);
4487 /* Remove the canonical strings from the cleanup, they are needed below. */
4488 if (canonical
!= (char **) NULL
)
4489 discard_cleanups (canonical_strings_chain
);
4491 b
= set_raw_breakpoint (sals
.sals
[0], bp_kind
);
4492 set_breakpoint_count (breakpoint_count
+ 1);
4493 b
->number
= breakpoint_count
;
4495 b
->cond_string
= (cond_string
== NULL
) ?
4496 NULL
: savestring (cond_string
, strlen (cond_string
));
4499 if (canonical
!= (char **) NULL
&& canonical
[0] != NULL
)
4500 b
->addr_string
= canonical
[0];
4501 else if (addr_start
)
4502 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
4504 b
->enable_state
= bp_enabled
;
4505 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4507 if (dll_pathname
== NULL
)
4508 b
->dll_pathname
= NULL
;
4511 b
->dll_pathname
= (char *) xmalloc (strlen (dll_pathname
) + 1);
4512 strcpy (b
->dll_pathname
, dll_pathname
);
4516 do_cleanups (old_chain
);
4520 create_solib_load_event_breakpoint (char *hookname
, int tempflag
,
4521 char *dll_pathname
, char *cond_string
)
4523 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4524 cond_string
, bp_catch_load
);
4528 create_solib_unload_event_breakpoint (char *hookname
, int tempflag
,
4529 char *dll_pathname
, char *cond_string
)
4531 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4532 cond_string
, bp_catch_unload
);
4536 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4537 enum bptype bp_kind
)
4539 struct symtab_and_line sal
;
4540 struct breakpoint
*b
;
4541 int thread
= -1; /* All threads. */
4548 b
= set_raw_breakpoint (sal
, bp_kind
);
4549 set_breakpoint_count (breakpoint_count
+ 1);
4550 b
->number
= breakpoint_count
;
4552 b
->cond_string
= (cond_string
== NULL
) ?
4553 NULL
: savestring (cond_string
, strlen (cond_string
));
4555 b
->addr_string
= NULL
;
4556 b
->enable_state
= bp_enabled
;
4557 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4558 b
->forked_inferior_pid
= 0;
4564 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4566 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4570 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4572 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4576 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4578 struct symtab_and_line sal
;
4579 struct breakpoint
*b
;
4580 int thread
= -1; /* All threads. */
4587 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4588 set_breakpoint_count (breakpoint_count
+ 1);
4589 b
->number
= breakpoint_count
;
4591 b
->cond_string
= (cond_string
== NULL
) ?
4592 NULL
: savestring (cond_string
, strlen (cond_string
));
4594 b
->addr_string
= NULL
;
4595 b
->enable_state
= bp_enabled
;
4596 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4602 hw_breakpoint_used_count (void)
4604 struct breakpoint
*b
;
4609 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4617 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4619 struct breakpoint
*b
;
4622 *other_type_used
= 0;
4625 if (breakpoint_enabled (b
))
4627 if (b
->type
== type
)
4629 else if ((b
->type
== bp_hardware_watchpoint
||
4630 b
->type
== bp_read_watchpoint
||
4631 b
->type
== bp_access_watchpoint
))
4632 *other_type_used
= 1;
4638 /* Call this after hitting the longjmp() breakpoint. Use this to set
4639 a new breakpoint at the target of the jmp_buf.
4641 FIXME - This ought to be done by setting a temporary breakpoint
4642 that gets deleted automatically... */
4645 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_id frame_id
)
4647 struct breakpoint
*b
;
4650 if (b
->type
== bp_longjmp_resume
)
4652 b
->loc
->requested_address
= pc
;
4653 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
,
4655 b
->enable_state
= bp_enabled
;
4656 b
->frame_id
= frame_id
;
4657 check_duplicates (b
);
4663 disable_watchpoints_before_interactive_call_start (void)
4665 struct breakpoint
*b
;
4669 if (((b
->type
== bp_watchpoint
)
4670 || (b
->type
== bp_hardware_watchpoint
)
4671 || (b
->type
== bp_read_watchpoint
)
4672 || (b
->type
== bp_access_watchpoint
)
4673 || ep_is_exception_catchpoint (b
))
4674 && breakpoint_enabled (b
))
4676 b
->enable_state
= bp_call_disabled
;
4677 check_duplicates (b
);
4683 enable_watchpoints_after_interactive_call_stop (void)
4685 struct breakpoint
*b
;
4689 if (((b
->type
== bp_watchpoint
)
4690 || (b
->type
== bp_hardware_watchpoint
)
4691 || (b
->type
== bp_read_watchpoint
)
4692 || (b
->type
== bp_access_watchpoint
)
4693 || ep_is_exception_catchpoint (b
))
4694 && (b
->enable_state
== bp_call_disabled
))
4696 b
->enable_state
= bp_enabled
;
4697 check_duplicates (b
);
4703 /* Set a breakpoint that will evaporate an end of command
4704 at address specified by SAL.
4705 Restrict it to frame FRAME if FRAME is nonzero. */
4708 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4711 struct breakpoint
*b
;
4712 b
= set_raw_breakpoint (sal
, type
);
4713 b
->enable_state
= bp_enabled
;
4714 b
->disposition
= disp_donttouch
;
4715 b
->frame_id
= frame_id
;
4717 /* If we're debugging a multi-threaded program, then we
4718 want momentary breakpoints to be active in only a
4719 single thread of control. */
4720 if (in_thread_list (inferior_ptid
))
4721 b
->thread
= pid_to_thread_id (inferior_ptid
);
4727 /* Tell the user we have just set a breakpoint B. */
4730 mention (struct breakpoint
*b
)
4733 struct cleanup
*old_chain
, *ui_out_chain
;
4734 struct ui_stream
*stb
;
4736 stb
= ui_out_stream_new (uiout
);
4737 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4739 /* FIXME: This is misplaced; mention() is called by things (like
4740 hitting a watchpoint) other than breakpoint creation. It should
4741 be possible to clean this up and at the same time replace the
4742 random calls to breakpoint_changed with this hook, as has already
4743 been done for deprecated_delete_breakpoint_hook and so on. */
4744 if (deprecated_create_breakpoint_hook
)
4745 deprecated_create_breakpoint_hook (b
);
4746 breakpoint_create_event (b
->number
);
4748 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4749 b
->ops
->print_mention (b
);
4754 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b
->number
);
4757 ui_out_text (uiout
, "Watchpoint ");
4758 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4759 ui_out_field_int (uiout
, "number", b
->number
);
4760 ui_out_text (uiout
, ": ");
4761 print_expression (b
->exp
, stb
->stream
);
4762 ui_out_field_stream (uiout
, "exp", stb
);
4763 do_cleanups (ui_out_chain
);
4765 case bp_hardware_watchpoint
:
4766 ui_out_text (uiout
, "Hardware watchpoint ");
4767 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4768 ui_out_field_int (uiout
, "number", b
->number
);
4769 ui_out_text (uiout
, ": ");
4770 print_expression (b
->exp
, stb
->stream
);
4771 ui_out_field_stream (uiout
, "exp", stb
);
4772 do_cleanups (ui_out_chain
);
4774 case bp_read_watchpoint
:
4775 ui_out_text (uiout
, "Hardware read watchpoint ");
4776 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4777 ui_out_field_int (uiout
, "number", b
->number
);
4778 ui_out_text (uiout
, ": ");
4779 print_expression (b
->exp
, stb
->stream
);
4780 ui_out_field_stream (uiout
, "exp", stb
);
4781 do_cleanups (ui_out_chain
);
4783 case bp_access_watchpoint
:
4784 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4785 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4786 ui_out_field_int (uiout
, "number", b
->number
);
4787 ui_out_text (uiout
, ": ");
4788 print_expression (b
->exp
, stb
->stream
);
4789 ui_out_field_stream (uiout
, "exp", stb
);
4790 do_cleanups (ui_out_chain
);
4793 if (ui_out_is_mi_like_p (uiout
))
4798 printf_filtered ("Breakpoint %d", b
->number
);
4801 case bp_hardware_breakpoint
:
4802 if (ui_out_is_mi_like_p (uiout
))
4807 printf_filtered ("Hardware assisted breakpoint %d", b
->number
);
4811 case bp_catch_unload
:
4812 printf_filtered ("Catchpoint %d (%s %s)",
4814 (b
->type
== bp_catch_load
) ? "load" : "unload",
4815 (b
->dll_pathname
!= NULL
) ?
4816 b
->dll_pathname
: "<any library>");
4819 case bp_catch_vfork
:
4820 printf_filtered ("Catchpoint %d (%s)",
4822 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4825 printf_filtered ("Catchpoint %d (exec)",
4828 case bp_catch_catch
:
4829 case bp_catch_throw
:
4830 printf_filtered ("Catchpoint %d (%s)",
4832 (b
->type
== bp_catch_catch
) ? "catch" : "throw");
4838 case bp_longjmp_resume
:
4839 case bp_step_resume
:
4840 case bp_through_sigtramp
:
4842 case bp_watchpoint_scope
:
4843 case bp_shlib_event
:
4844 case bp_thread_event
:
4845 case bp_overlay_event
:
4853 printf_filtered (" (%s) pending.", b
->addr_string
);
4857 if (addressprint
|| b
->source_file
== NULL
)
4859 printf_filtered (" at ");
4860 print_address_numeric (b
->loc
->address
, 1, gdb_stdout
);
4863 printf_filtered (": file %s, line %d.",
4864 b
->source_file
, b
->line_number
);
4867 do_cleanups (old_chain
);
4868 if (ui_out_is_mi_like_p (uiout
))
4870 printf_filtered ("\n");
4874 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4875 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4876 COND[i] and COND_STRING[i] values.
4878 The parameter PENDING_BP points to a pending breakpoint that is
4879 the basis of the breakpoints currently being created. The pending
4880 breakpoint may contain a separate condition string or commands
4881 that were added after the initial pending breakpoint was created.
4883 NOTE: If the function succeeds, the caller is expected to cleanup
4884 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4885 array contents). If the function fails (error() is called), the
4886 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4887 COND and SALS arrays and each of those arrays contents. */
4890 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
4891 struct expression
**cond
, char **cond_string
,
4892 enum bptype type
, enum bpdisp disposition
,
4893 int thread
, int ignore_count
, int from_tty
,
4894 struct breakpoint
*pending_bp
)
4896 if (type
== bp_hardware_breakpoint
)
4898 int i
= hw_breakpoint_used_count ();
4899 int target_resources_ok
=
4900 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
4902 if (target_resources_ok
== 0)
4903 error ("No hardware breakpoint support in the target.");
4904 else if (target_resources_ok
< 0)
4905 error ("Hardware breakpoints used exceeds limit.");
4908 /* Now set all the breakpoints. */
4911 for (i
= 0; i
< sals
.nelts
; i
++)
4913 struct breakpoint
*b
;
4914 struct symtab_and_line sal
= sals
.sals
[i
];
4917 describe_other_breakpoints (sal
.pc
, sal
.section
);
4919 b
= set_raw_breakpoint (sal
, type
);
4920 set_breakpoint_count (breakpoint_count
+ 1);
4921 b
->number
= breakpoint_count
;
4925 b
->addr_string
= addr_string
[i
];
4927 /* addr_string has to be used or breakpoint_re_set will delete
4929 b
->addr_string
= xstrprintf ("*0x%s", paddr (b
->loc
->address
));
4930 b
->cond_string
= cond_string
[i
];
4931 b
->ignore_count
= ignore_count
;
4932 b
->enable_state
= bp_enabled
;
4933 b
->disposition
= disposition
;
4934 /* If resolving a pending breakpoint, a check must be made to see if
4935 the user has specified a new condition or commands for the
4936 breakpoint. A new condition will override any condition that was
4937 initially specified with the initial breakpoint command. */
4941 if (pending_bp
->cond_string
)
4943 arg
= pending_bp
->cond_string
;
4944 b
->cond_string
= savestring (arg
, strlen (arg
));
4945 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->loc
->address
), 0);
4947 error ("Junk at end of pending breakpoint condition expression");
4949 /* If there are commands associated with the breakpoint, they should
4951 if (pending_bp
->commands
)
4952 b
->commands
= copy_command_lines (pending_bp
->commands
);
4954 /* We have to copy over the ignore_count and thread as well. */
4955 b
->ignore_count
= pending_bp
->ignore_count
;
4956 b
->thread
= pending_bp
->thread
;
4963 /* Parse ARG which is assumed to be a SAL specification possibly
4964 followed by conditionals. On return, SALS contains an array of SAL
4965 addresses found. ADDR_STRING contains a vector of (canonical)
4966 address strings. ARG points to the end of the SAL. */
4969 parse_breakpoint_sals (char **address
,
4970 struct symtabs_and_lines
*sals
,
4971 char ***addr_string
,
4974 char *addr_start
= *address
;
4975 *addr_string
= NULL
;
4976 /* If no arg given, or if first arg is 'if ', use the default
4978 if ((*address
) == NULL
4979 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
4981 if (default_breakpoint_valid
)
4983 struct symtab_and_line sal
;
4984 init_sal (&sal
); /* initialize to zeroes */
4985 sals
->sals
= (struct symtab_and_line
*)
4986 xmalloc (sizeof (struct symtab_and_line
));
4987 sal
.pc
= default_breakpoint_address
;
4988 sal
.line
= default_breakpoint_line
;
4989 sal
.symtab
= default_breakpoint_symtab
;
4990 sal
.section
= find_pc_overlay (sal
.pc
);
4991 sals
->sals
[0] = sal
;
4995 error ("No default breakpoint address now.");
4999 /* Force almost all breakpoints to be in terms of the
5000 current_source_symtab (which is decode_line_1's default). This
5001 should produce the results we want almost all of the time while
5002 leaving default_breakpoint_* alone.
5003 ObjC: However, don't match an Objective-C method name which
5004 may have a '+' or '-' succeeded by a '[' */
5006 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
5008 if (default_breakpoint_valid
5010 || ((strchr ("+-", (*address
)[0]) != NULL
)
5011 && ((*address
)[1] != '['))))
5012 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
5013 default_breakpoint_line
, addr_string
,
5016 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0,
5017 addr_string
, not_found_ptr
);
5019 /* For any SAL that didn't have a canonical string, fill one in. */
5020 if (sals
->nelts
> 0 && *addr_string
== NULL
)
5021 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
5022 if (addr_start
!= (*address
))
5025 for (i
= 0; i
< sals
->nelts
; i
++)
5027 /* Add the string if not present. */
5028 if ((*addr_string
)[i
] == NULL
)
5029 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
5035 /* Convert each SAL into a real PC. Verify that the PC can be
5036 inserted as a breakpoint. If it can't throw an error. */
5039 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
5043 for (i
= 0; i
< sals
->nelts
; i
++)
5045 resolve_sal_pc (&sals
->sals
[i
]);
5047 /* It's possible for the PC to be nonzero, but still an illegal
5048 value on some targets.
5050 For example, on HP-UX if you start gdb, and before running the
5051 inferior you try to set a breakpoint on a shared library function
5052 "foo" where the inferior doesn't call "foo" directly but does
5053 pass its address to another function call, then we do find a
5054 minimal symbol for the "foo", but it's address is invalid.
5055 (Appears to be an index into a table that the loader sets up
5056 when the inferior is run.)
5058 Give the target a chance to bless sals.sals[i].pc before we
5059 try to make a breakpoint for it. */
5060 #ifdef DEPRECATED_PC_REQUIRES_RUN_BEFORE_USE
5061 if (DEPRECATED_PC_REQUIRES_RUN_BEFORE_USE (sals
->sals
[i
].pc
))
5063 if (address
== NULL
)
5064 error ("Cannot break without a running program.");
5066 error ("Cannot break on %s without a running program.",
5074 do_captured_parse_breakpoint (struct ui_out
*ui
, void *data
)
5076 struct captured_parse_breakpoint_args
*args
= data
;
5078 parse_breakpoint_sals (args
->arg_p
, args
->sals_p
, args
->addr_string_p
,
5079 args
->not_found_ptr
);
5082 /* Set a breakpoint according to ARG (function, linenum or *address)
5083 flag: first bit : 0 non-temporary, 1 temporary.
5084 second bit : 0 normal breakpoint, 1 hardware breakpoint.
5086 PENDING_BP is non-NULL when this function is being called to resolve
5087 a pending breakpoint. */
5090 break_command_1 (char *arg
, int flag
, int from_tty
, struct breakpoint
*pending_bp
)
5093 int tempflag
, hardwareflag
;
5094 struct symtabs_and_lines sals
;
5095 struct expression
**cond
= 0;
5096 struct symtab_and_line pending_sal
;
5097 char **cond_string
= (char **) NULL
;
5100 char *addr_start
= arg
;
5102 struct cleanup
*old_chain
;
5103 struct cleanup
*breakpoint_chain
= NULL
;
5104 struct captured_parse_breakpoint_args parse_args
;
5108 int ignore_count
= 0;
5111 hardwareflag
= flag
& BP_HARDWAREFLAG
;
5112 tempflag
= flag
& BP_TEMPFLAG
;
5118 parse_args
.arg_p
= &arg
;
5119 parse_args
.sals_p
= &sals
;
5120 parse_args
.addr_string_p
= &addr_string
;
5121 parse_args
.not_found_ptr
= ¬_found
;
5123 e
= catch_exception (uiout
, do_captured_parse_breakpoint
,
5124 &parse_args
, RETURN_MASK_ALL
);
5126 /* If caller is interested in rc value from parse, set value. */
5130 exception_print (gdb_stderr
, e
);
5135 case NOT_FOUND_ERROR
:
5136 /* If called to resolve pending breakpoint, just return
5141 exception_print (gdb_stderr
, e
);
5143 /* If pending breakpoint support is turned off, throw
5146 if (pending_break_support
== AUTO_BOOLEAN_FALSE
)
5147 deprecated_throw_reason (RETURN_ERROR
);
5149 /* If pending breakpoint support is auto query and the user
5150 selects no, then simply return the error code. */
5151 if (pending_break_support
== AUTO_BOOLEAN_AUTO
&&
5152 !nquery ("Make breakpoint pending on future shared library load? "))
5155 /* At this point, either the user was queried about setting
5156 a pending breakpoint and selected yes, or pending
5157 breakpoint behavior is on and thus a pending breakpoint
5158 is defaulted on behalf of the user. */
5159 copy_arg
= xstrdup (addr_start
);
5160 addr_string
= ©_arg
;
5162 sals
.sals
= &pending_sal
;
5167 exception_print (gdb_stderr
, e
);
5175 /* Create a chain of things that always need to be cleaned up. */
5176 old_chain
= make_cleanup (null_cleanup
, 0);
5180 /* Make sure that all storage allocated to SALS gets freed. */
5181 make_cleanup (xfree
, sals
.sals
);
5183 /* Cleanup the addr_string array but not its contents. */
5184 make_cleanup (xfree
, addr_string
);
5187 /* Allocate space for all the cond expressions. */
5188 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5189 make_cleanup (xfree
, cond
);
5191 /* Allocate space for all the cond strings. */
5192 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5193 make_cleanup (xfree
, cond_string
);
5195 /* ----------------------------- SNIP -----------------------------
5196 Anything added to the cleanup chain beyond this point is assumed
5197 to be part of a breakpoint. If the breakpoint create succeeds
5198 then the memory is not reclaimed. */
5199 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5201 /* Mark the contents of the addr_string for cleanup. These go on
5202 the breakpoint_chain and only occure if the breakpoint create
5204 for (i
= 0; i
< sals
.nelts
; i
++)
5206 if (addr_string
[i
] != NULL
)
5207 make_cleanup (xfree
, addr_string
[i
]);
5210 /* Resolve all line numbers to PC's and verify that the addresses
5211 are ok for the target. */
5213 breakpoint_sals_to_pc (&sals
, addr_start
);
5215 /* Verify that condition can be parsed, before setting any
5216 breakpoints. Allocate a separate condition expression for each
5218 thread
= -1; /* No specific thread yet */
5221 for (i
= 0; i
< sals
.nelts
; i
++)
5228 char *cond_start
= NULL
;
5229 char *cond_end
= NULL
;
5230 while (*tok
== ' ' || *tok
== '\t')
5235 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5238 toklen
= end_tok
- tok
;
5240 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5242 tok
= cond_start
= end_tok
+ 1;
5243 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
),
5245 make_cleanup (xfree
, cond
[i
]);
5247 cond_string
[i
] = savestring (cond_start
,
5248 cond_end
- cond_start
);
5249 make_cleanup (xfree
, cond_string
[i
]);
5251 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5257 thread
= strtol (tok
, &tok
, 0);
5259 error ("Junk after thread keyword.");
5260 if (!valid_thread_id (thread
))
5261 error ("Unknown thread %d\n", thread
);
5264 error ("Junk at end of arguments.");
5267 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5268 hardwareflag
? bp_hardware_breakpoint
5270 tempflag
? disp_del
: disp_donttouch
,
5271 thread
, ignore_count
, from_tty
,
5276 struct symtab_and_line sal
;
5277 struct breakpoint
*b
;
5282 make_cleanup (xfree
, copy_arg
);
5284 b
= set_raw_breakpoint (sal
, hardwareflag
? bp_hardware_breakpoint
5286 set_breakpoint_count (breakpoint_count
+ 1);
5287 b
->number
= breakpoint_count
;
5290 b
->addr_string
= *addr_string
;
5291 b
->cond_string
= *cond_string
;
5292 b
->ignore_count
= ignore_count
;
5294 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
5295 b
->from_tty
= from_tty
;
5302 warning ("Multiple breakpoints were set.");
5303 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5305 /* That's it. Discard the cleanups for data inserted into the
5307 discard_cleanups (breakpoint_chain
);
5308 /* But cleanup everything else. */
5309 do_cleanups (old_chain
);
5314 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
5315 linenum or *address) with COND and IGNORE_COUNT. */
5317 struct captured_breakpoint_args
5328 do_captured_breakpoint (struct ui_out
*uiout
, void *data
)
5330 struct captured_breakpoint_args
*args
= data
;
5331 struct symtabs_and_lines sals
;
5332 struct expression
**cond
;
5333 struct cleanup
*old_chain
;
5334 struct cleanup
*breakpoint_chain
= NULL
;
5341 /* Parse the source and lines spec. Delay check that the expression
5342 didn't contain trailing garbage until after cleanups are in
5346 address_end
= args
->address
;
5348 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
, 0);
5353 /* Create a chain of things at always need to be cleaned up. */
5354 old_chain
= make_cleanup (null_cleanup
, 0);
5356 /* Always have a addr_string array, even if it is empty. */
5357 make_cleanup (xfree
, addr_string
);
5359 /* Make sure that all storage allocated to SALS gets freed. */
5360 make_cleanup (xfree
, sals
.sals
);
5362 /* Allocate space for all the cond expressions. */
5363 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5364 make_cleanup (xfree
, cond
);
5366 /* Allocate space for all the cond strings. */
5367 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5368 make_cleanup (xfree
, cond_string
);
5370 /* ----------------------------- SNIP -----------------------------
5371 Anything added to the cleanup chain beyond this point is assumed
5372 to be part of a breakpoint. If the breakpoint create goes
5373 through then that memory is not cleaned up. */
5374 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5376 /* Mark the contents of the addr_string for cleanup. These go on
5377 the breakpoint_chain and only occure if the breakpoint create
5379 for (i
= 0; i
< sals
.nelts
; i
++)
5381 if (addr_string
[i
] != NULL
)
5382 make_cleanup (xfree
, addr_string
[i
]);
5385 /* Wait until now before checking for garbage at the end of the
5386 address. That way cleanups can take care of freeing any
5388 if (*address_end
!= '\0')
5389 error ("Garbage %s following breakpoint address", address_end
);
5391 /* Resolve all line numbers to PC's. */
5392 breakpoint_sals_to_pc (&sals
, args
->address
);
5394 /* Verify that conditions can be parsed, before setting any
5396 for (i
= 0; i
< sals
.nelts
; i
++)
5398 if (args
->condition
!= NULL
)
5400 char *tok
= args
->condition
;
5401 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
5403 error ("Garbage %s follows condition", tok
);
5404 make_cleanup (xfree
, cond
[i
]);
5405 cond_string
[i
] = xstrdup (args
->condition
);
5409 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5410 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
5411 args
->tempflag
? disp_del
: disp_donttouch
,
5412 args
->thread
, args
->ignore_count
, 0/*from-tty*/,
5413 NULL
/*pending_bp*/);
5415 /* That's it. Discard the cleanups for data inserted into the
5417 discard_cleanups (breakpoint_chain
);
5418 /* But cleanup everything else. */
5419 do_cleanups (old_chain
);
5424 gdb_breakpoint (char *address
, char *condition
,
5425 int hardwareflag
, int tempflag
,
5426 int thread
, int ignore_count
,
5427 char **error_message
)
5429 struct captured_breakpoint_args args
;
5430 args
.address
= address
;
5431 args
.condition
= condition
;
5432 args
.hardwareflag
= hardwareflag
;
5433 args
.tempflag
= tempflag
;
5434 args
.thread
= thread
;
5435 args
.ignore_count
= ignore_count
;
5436 return catch_exceptions_with_msg (uiout
, do_captured_breakpoint
, &args
,
5437 error_message
, RETURN_MASK_ALL
);
5441 /* Helper function for break_command_1 and disassemble_command. */
5444 resolve_sal_pc (struct symtab_and_line
*sal
)
5448 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5450 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5451 error ("No line %d in file \"%s\".",
5452 sal
->line
, sal
->symtab
->filename
);
5456 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5458 struct blockvector
*bv
;
5463 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &index
, sal
->symtab
);
5466 b
= BLOCKVECTOR_BLOCK (bv
, index
);
5467 sym
= block_function (b
);
5470 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5471 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5475 /* It really is worthwhile to have the section, so we'll just
5476 have to look harder. This case can be executed if we have
5477 line numbers but no functions (as can happen in assembly
5480 struct minimal_symbol
*msym
;
5482 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5484 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5491 break_command (char *arg
, int from_tty
)
5493 break_command_1 (arg
, 0, from_tty
, NULL
);
5497 tbreak_command (char *arg
, int from_tty
)
5499 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
, NULL
);
5503 hbreak_command (char *arg
, int from_tty
)
5505 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
, NULL
);
5509 thbreak_command (char *arg
, int from_tty
)
5511 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
, NULL
);
5515 stop_command (char *arg
, int from_tty
)
5517 printf_filtered ("Specify the type of breakpoint to set.\n\
5518 Usage: stop in <function | address>\n\
5523 stopin_command (char *arg
, int from_tty
)
5527 if (arg
== (char *) NULL
)
5529 else if (*arg
!= '*')
5534 /* look for a ':'. If this is a line number specification, then
5535 say it is bad, otherwise, it should be an address or
5536 function/method name */
5537 while (*argptr
&& !hasColon
)
5539 hasColon
= (*argptr
== ':');
5544 badInput
= (*argptr
!= ':'); /* Not a class::method */
5546 badInput
= isdigit (*arg
); /* a simple line number */
5550 printf_filtered ("Usage: stop in <function | address>\n");
5552 break_command_1 (arg
, 0, from_tty
, NULL
);
5556 stopat_command (char *arg
, int from_tty
)
5560 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5567 /* look for a ':'. If there is a '::' then get out, otherwise
5568 it is probably a line number. */
5569 while (*argptr
&& !hasColon
)
5571 hasColon
= (*argptr
== ':');
5576 badInput
= (*argptr
== ':'); /* we have class::method */
5578 badInput
= !isdigit (*arg
); /* not a line number */
5582 printf_filtered ("Usage: stop at <line>\n");
5584 break_command_1 (arg
, 0, from_tty
, NULL
);
5587 /* accessflag: hw_write: watch write,
5588 hw_read: watch read,
5589 hw_access: watch access (read or write) */
5591 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5593 struct breakpoint
*b
;
5594 struct symtab_and_line sal
;
5595 struct expression
*exp
;
5596 struct block
*exp_valid_block
;
5597 struct value
*val
, *mark
;
5598 struct frame_info
*frame
;
5599 struct frame_info
*prev_frame
= NULL
;
5600 char *exp_start
= NULL
;
5601 char *exp_end
= NULL
;
5602 char *tok
, *end_tok
;
5604 char *cond_start
= NULL
;
5605 char *cond_end
= NULL
;
5606 struct expression
*cond
= NULL
;
5607 int i
, other_type_used
, target_resources_ok
= 0;
5608 enum bptype bp_type
;
5611 init_sal (&sal
); /* initialize to zeroes */
5613 /* Parse arguments. */
5614 innermost_block
= NULL
;
5616 exp
= parse_exp_1 (&arg
, 0, 0);
5618 exp_valid_block
= innermost_block
;
5619 mark
= value_mark ();
5620 val
= evaluate_expression (exp
);
5621 release_value (val
);
5622 if (VALUE_LAZY (val
))
5623 value_fetch_lazy (val
);
5626 while (*tok
== ' ' || *tok
== '\t')
5630 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5633 toklen
= end_tok
- tok
;
5634 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5636 tok
= cond_start
= end_tok
+ 1;
5637 cond
= parse_exp_1 (&tok
, 0, 0);
5641 error ("Junk at end of command.");
5643 if (accessflag
== hw_read
)
5644 bp_type
= bp_read_watchpoint
;
5645 else if (accessflag
== hw_access
)
5646 bp_type
= bp_access_watchpoint
;
5648 bp_type
= bp_hardware_watchpoint
;
5650 mem_cnt
= can_use_hardware_watchpoint (val
);
5651 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5652 error ("Expression cannot be implemented with read/access watchpoint.");
5655 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5656 target_resources_ok
=
5657 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5659 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5660 error ("Target does not support this type of hardware watchpoint.");
5662 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5663 error ("Target can only support one kind of HW watchpoint at a time.");
5666 #if defined(HPUXHPPA)
5667 /* On HP-UX if you set a h/w
5668 watchpoint before the "run" command, the inferior dies with a e.g.,
5669 SIGILL once you start it. I initially believed this was due to a
5670 bad interaction between page protection traps and the initial
5671 startup sequence by the dynamic linker.
5673 However, I tried avoiding that by having HP-UX's implementation of
5674 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5675 yet, which forced slow watches before a "run" or "attach", and it
5676 still fails somewhere in the startup code.
5678 Until I figure out what's happening, I'm disallowing watches altogether
5679 before the "run" or "attach" command. We'll tell the user they must
5680 set watches after getting the program started. */
5681 if (!target_has_execution
)
5683 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5686 #endif /* HPUXHPPA */
5688 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5689 watchpoint could not be set. */
5690 if (!mem_cnt
|| target_resources_ok
<= 0)
5691 bp_type
= bp_watchpoint
;
5693 /* Now set up the breakpoint. */
5694 b
= set_raw_breakpoint (sal
, bp_type
);
5695 set_breakpoint_count (breakpoint_count
+ 1);
5696 b
->number
= breakpoint_count
;
5697 b
->disposition
= disp_donttouch
;
5699 b
->exp_valid_block
= exp_valid_block
;
5700 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5704 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5708 frame
= block_innermost_frame (exp_valid_block
);
5711 prev_frame
= get_prev_frame (frame
);
5712 b
->watchpoint_frame
= get_frame_id (frame
);
5716 memset (&b
->watchpoint_frame
, 0, sizeof (b
->watchpoint_frame
));
5719 /* If the expression is "local", then set up a "watchpoint scope"
5720 breakpoint at the point where we've left the scope of the watchpoint
5722 if (innermost_block
)
5726 struct breakpoint
*scope_breakpoint
;
5727 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5728 bp_watchpoint_scope
);
5730 scope_breakpoint
->enable_state
= bp_enabled
;
5732 /* Automatically delete the breakpoint when it hits. */
5733 scope_breakpoint
->disposition
= disp_del
;
5735 /* Only break in the proper frame (help with recursion). */
5736 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5738 /* Set the address at which we will stop. */
5739 scope_breakpoint
->loc
->requested_address
5740 = get_frame_pc (prev_frame
);
5741 scope_breakpoint
->loc
->address
5742 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
,
5743 scope_breakpoint
->type
);
5745 /* The scope breakpoint is related to the watchpoint. We
5746 will need to act on them together. */
5747 b
->related_breakpoint
= scope_breakpoint
;
5750 value_free_to_mark (mark
);
5754 /* Return count of locations need to be watched and can be handled
5755 in hardware. If the watchpoint can not be handled
5756 in hardware return zero. */
5758 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5759 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5760 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5764 can_use_hardware_watchpoint (struct value
*v
)
5766 int found_memory_cnt
= 0;
5767 struct value
*head
= v
;
5769 /* Did the user specifically forbid us to use hardware watchpoints? */
5770 if (!can_use_hw_watchpoints
)
5773 /* Make sure that the value of the expression depends only upon
5774 memory contents, and values computed from them within GDB. If we
5775 find any register references or function calls, we can't use a
5776 hardware watchpoint.
5778 The idea here is that evaluating an expression generates a series
5779 of values, one holding the value of every subexpression. (The
5780 expression a*b+c has five subexpressions: a, b, a*b, c, and
5781 a*b+c.) GDB's values hold almost enough information to establish
5782 the criteria given above --- they identify memory lvalues,
5783 register lvalues, computed values, etcetera. So we can evaluate
5784 the expression, and then scan the chain of values that leaves
5785 behind to decide whether we can detect any possible change to the
5786 expression's final value using only hardware watchpoints.
5788 However, I don't think that the values returned by inferior
5789 function calls are special in any way. So this function may not
5790 notice that an expression involving an inferior function call
5791 can't be watched with hardware watchpoints. FIXME. */
5792 for (; v
; v
= v
->next
)
5794 if (VALUE_LVAL (v
) == lval_memory
)
5797 /* A lazy memory lvalue is one that GDB never needed to fetch;
5798 we either just used its address (e.g., `a' in `a.b') or
5799 we never needed it at all (e.g., `a' in `a,b'). */
5803 /* Ahh, memory we actually used! Check if we can cover
5804 it with hardware watchpoints. */
5805 struct type
*vtype
= check_typedef (value_type (v
));
5807 /* We only watch structs and arrays if user asked for it
5808 explicitly, never if they just happen to appear in a
5809 middle of some value chain. */
5811 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
5812 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
5814 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + value_offset (v
);
5815 int len
= TYPE_LENGTH (value_type (v
));
5817 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
5824 else if (v
->lval
!= not_lval
&& v
->modifiable
== 0)
5825 return 0; /* ??? What does this represent? */
5826 else if (v
->lval
== lval_register
)
5827 return 0; /* cannot watch a register with a HW watchpoint */
5830 /* The expression itself looks suitable for using a hardware
5831 watchpoint, but give the target machine a chance to reject it. */
5832 return found_memory_cnt
;
5836 watch_command_wrapper (char *arg
, int from_tty
)
5838 watch_command (arg
, from_tty
);
5842 watch_command (char *arg
, int from_tty
)
5844 watch_command_1 (arg
, hw_write
, from_tty
);
5848 rwatch_command_wrapper (char *arg
, int from_tty
)
5850 rwatch_command (arg
, from_tty
);
5854 rwatch_command (char *arg
, int from_tty
)
5856 watch_command_1 (arg
, hw_read
, from_tty
);
5860 awatch_command_wrapper (char *arg
, int from_tty
)
5862 awatch_command (arg
, from_tty
);
5866 awatch_command (char *arg
, int from_tty
)
5868 watch_command_1 (arg
, hw_access
, from_tty
);
5872 /* Helper routines for the until_command routine in infcmd.c. Here
5873 because it uses the mechanisms of breakpoints. */
5875 /* This function is called by fetch_inferior_event via the
5876 cmd_continuation pointer, to complete the until command. It takes
5877 care of cleaning up the temporary breakpoints set up by the until
5880 until_break_command_continuation (struct continuation_arg
*arg
)
5882 struct cleanup
*cleanups
;
5884 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
5885 do_exec_cleanups (cleanups
);
5889 until_break_command (char *arg
, int from_tty
, int anywhere
)
5891 struct symtabs_and_lines sals
;
5892 struct symtab_and_line sal
;
5893 struct frame_info
*prev_frame
= get_prev_frame (deprecated_selected_frame
);
5894 struct breakpoint
*breakpoint
;
5895 struct cleanup
*old_chain
;
5896 struct continuation_arg
*arg1
;
5899 clear_proceed_status ();
5901 /* Set a breakpoint where the user wants it and at return from
5904 if (default_breakpoint_valid
)
5905 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
5906 default_breakpoint_line
, (char ***) NULL
, NULL
);
5908 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
5909 0, (char ***) NULL
, NULL
);
5911 if (sals
.nelts
!= 1)
5912 error ("Couldn't get information on specified line.");
5915 xfree (sals
.sals
); /* malloc'd, so freed */
5918 error ("Junk at end of arguments.");
5920 resolve_sal_pc (&sal
);
5923 /* If the user told us to continue until a specified location,
5924 we don't specify a frame at which we need to stop. */
5925 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
5927 /* Otherwise, specify the current frame, because we want to stop only
5928 at the very same frame. */
5929 breakpoint
= set_momentary_breakpoint (sal
,
5930 get_frame_id (deprecated_selected_frame
),
5933 if (!target_can_async_p ())
5934 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
5936 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
5938 /* If we are running asynchronously, and the target supports async
5939 execution, we are not waiting for the target to stop, in the call
5940 tp proceed, below. This means that we cannot delete the
5941 brekpoints until the target has actually stopped. The only place
5942 where we get a chance to do that is in fetch_inferior_event, so
5943 we must set things up for that. */
5945 if (target_can_async_p ())
5947 /* In this case the arg for the continuation is just the point
5948 in the exec_cleanups chain from where to start doing
5949 cleanups, because all the continuation does is the cleanups in
5950 the exec_cleanup_chain. */
5952 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
5954 arg1
->data
.pointer
= old_chain
;
5956 add_continuation (until_break_command_continuation
, arg1
);
5959 /* Keep within the current frame, or in frames called by the current
5963 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
5964 sal
.pc
= get_frame_pc (prev_frame
);
5965 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
5967 if (!target_can_async_p ())
5968 make_cleanup_delete_breakpoint (breakpoint
);
5970 make_exec_cleanup_delete_breakpoint (breakpoint
);
5973 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
5974 /* Do the cleanups now, anly if we are not running asynchronously,
5975 of if we are, but the target is still synchronous. */
5976 if (!target_can_async_p ())
5977 do_cleanups (old_chain
);
5981 ep_skip_leading_whitespace (char **s
)
5983 if ((s
== NULL
) || (*s
== NULL
))
5985 while (isspace (**s
))
5989 /* This function examines a string, and attempts to find a token
5990 that might be an event name in the leading characters. If a
5991 possible match is found, a pointer to the last character of
5992 the token is returned. Else, NULL is returned. */
5995 ep_find_event_name_end (char *arg
)
5998 char *event_name_end
= NULL
;
6000 /* If we could depend upon the presense of strrpbrk, we'd use that... */
6004 /* We break out of the loop when we find a token delimiter.
6005 Basically, we're looking for alphanumerics and underscores;
6006 anything else delimites the token. */
6009 if (!isalnum (*s
) && (*s
!= '_'))
6015 return event_name_end
;
6019 /* This function attempts to parse an optional "if <cond>" clause
6020 from the arg string. If one is not found, it returns NULL.
6022 Else, it returns a pointer to the condition string. (It does not
6023 attempt to evaluate the string against a particular block.) And,
6024 it updates arg to point to the first character following the parsed
6025 if clause in the arg string. */
6028 ep_parse_optional_if_clause (char **arg
)
6032 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
6035 /* Skip the "if" keyword. */
6038 /* Skip any extra leading whitespace, and record the start of the
6039 condition string. */
6040 ep_skip_leading_whitespace (arg
);
6043 /* Assume that the condition occupies the remainder of the arg string. */
6044 (*arg
) += strlen (cond_string
);
6049 /* This function attempts to parse an optional filename from the arg
6050 string. If one is not found, it returns NULL.
6052 Else, it returns a pointer to the parsed filename. (This function
6053 makes no attempt to verify that a file of that name exists, or is
6054 accessible.) And, it updates arg to point to the first character
6055 following the parsed filename in the arg string.
6057 Note that clients needing to preserve the returned filename for
6058 future access should copy it to their own buffers. */
6060 ep_parse_optional_filename (char **arg
)
6062 static char filename
[1024];
6067 if ((*arg_p
== '\0') || isspace (*arg_p
))
6085 /* Commands to deal with catching events, such as signals, exceptions,
6086 process start/exit, etc. */
6090 catch_fork
, catch_vfork
6095 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
6098 char *cond_string
= NULL
;
6100 ep_skip_leading_whitespace (&arg
);
6102 /* The allowed syntax is:
6104 catch [v]fork if <cond>
6106 First, check if there's an if clause. */
6107 cond_string
= ep_parse_optional_if_clause (&arg
);
6109 if ((*arg
!= '\0') && !isspace (*arg
))
6110 error ("Junk at end of arguments.");
6112 /* If this target supports it, create a fork or vfork catchpoint
6113 and enable reporting of such events. */
6117 create_fork_event_catchpoint (tempflag
, cond_string
);
6120 create_vfork_event_catchpoint (tempflag
, cond_string
);
6123 error ("unsupported or unknown fork kind; cannot catch it");
6129 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6131 char *cond_string
= NULL
;
6133 ep_skip_leading_whitespace (&arg
);
6135 /* The allowed syntax is:
6137 catch exec if <cond>
6139 First, check if there's an if clause. */
6140 cond_string
= ep_parse_optional_if_clause (&arg
);
6142 if ((*arg
!= '\0') && !isspace (*arg
))
6143 error ("Junk at end of arguments.");
6145 /* If this target supports it, create an exec catchpoint
6146 and enable reporting of such events. */
6147 create_exec_event_catchpoint (tempflag
, cond_string
);
6151 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6153 char *dll_pathname
= NULL
;
6154 char *cond_string
= NULL
;
6156 ep_skip_leading_whitespace (&arg
);
6158 /* The allowed syntax is:
6160 catch load if <cond>
6161 catch load <filename>
6162 catch load <filename> if <cond>
6164 The user is not allowed to specify the <filename> after an
6167 We'll ignore the pathological case of a file named "if".
6169 First, check if there's an if clause. If so, then there
6170 cannot be a filename. */
6171 cond_string
= ep_parse_optional_if_clause (&arg
);
6173 /* If there was an if clause, then there cannot be a filename.
6174 Else, there might be a filename and an if clause. */
6175 if (cond_string
== NULL
)
6177 dll_pathname
= ep_parse_optional_filename (&arg
);
6178 ep_skip_leading_whitespace (&arg
);
6179 cond_string
= ep_parse_optional_if_clause (&arg
);
6182 if ((*arg
!= '\0') && !isspace (*arg
))
6183 error ("Junk at end of arguments.");
6185 /* Create a load breakpoint that only triggers when a load of
6186 the specified dll (or any dll, if no pathname was specified)
6188 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6189 dll_pathname
, cond_string
);
6193 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6195 char *dll_pathname
= NULL
;
6196 char *cond_string
= NULL
;
6198 ep_skip_leading_whitespace (&arg
);
6200 /* The allowed syntax is:
6202 catch unload if <cond>
6203 catch unload <filename>
6204 catch unload <filename> if <cond>
6206 The user is not allowed to specify the <filename> after an
6209 We'll ignore the pathological case of a file named "if".
6211 First, check if there's an if clause. If so, then there
6212 cannot be a filename. */
6213 cond_string
= ep_parse_optional_if_clause (&arg
);
6215 /* If there was an if clause, then there cannot be a filename.
6216 Else, there might be a filename and an if clause. */
6217 if (cond_string
== NULL
)
6219 dll_pathname
= ep_parse_optional_filename (&arg
);
6220 ep_skip_leading_whitespace (&arg
);
6221 cond_string
= ep_parse_optional_if_clause (&arg
);
6224 if ((*arg
!= '\0') && !isspace (*arg
))
6225 error ("Junk at end of arguments.");
6227 /* Create an unload breakpoint that only triggers when an unload of
6228 the specified dll (or any dll, if no pathname was specified)
6230 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6231 dll_pathname
, cond_string
);
6234 /* Commands to deal with catching exceptions. */
6236 /* Set a breakpoint at the specified callback routine for an
6237 exception event callback */
6240 create_exception_catchpoint (int tempflag
, char *cond_string
,
6241 enum exception_event_kind ex_event
,
6242 struct symtab_and_line
*sal
)
6244 struct breakpoint
*b
;
6245 int thread
= -1; /* All threads. */
6248 if (!sal
) /* no exception support? */
6253 case EX_EVENT_THROW
:
6254 bptype
= bp_catch_throw
;
6256 case EX_EVENT_CATCH
:
6257 bptype
= bp_catch_catch
;
6259 default: /* error condition */
6260 error ("Internal error -- invalid catchpoint kind");
6263 b
= set_raw_breakpoint (*sal
, bptype
);
6264 set_breakpoint_count (breakpoint_count
+ 1);
6265 b
->number
= breakpoint_count
;
6267 b
->cond_string
= (cond_string
== NULL
) ?
6268 NULL
: savestring (cond_string
, strlen (cond_string
));
6270 b
->addr_string
= NULL
;
6271 b
->enable_state
= bp_enabled
;
6272 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6276 static enum print_stop_action
6277 print_exception_catchpoint (struct breakpoint
*b
)
6279 annotate_catchpoint (b
->number
);
6281 if (strstr (b
->addr_string
, "throw") != NULL
)
6282 printf_filtered ("\nCatchpoint %d (exception thrown)\n",
6285 printf_filtered ("\nCatchpoint %d (exception caught)\n",
6288 return PRINT_SRC_AND_LOC
;
6292 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6297 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6300 *last_addr
= b
->loc
->address
;
6301 if (strstr (b
->addr_string
, "throw") != NULL
)
6302 ui_out_field_string (uiout
, "what", "exception throw");
6304 ui_out_field_string (uiout
, "what", "exception catch");
6308 print_mention_exception_catchpoint (struct breakpoint
*b
)
6310 if (strstr (b
->addr_string
, "throw") != NULL
)
6311 printf_filtered ("Catchpoint %d (throw)", b
->number
);
6313 printf_filtered ("Catchpoint %d (catch)", b
->number
);
6316 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6317 print_exception_catchpoint
,
6318 print_one_exception_catchpoint
,
6319 print_mention_exception_catchpoint
6323 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6324 enum exception_event_kind ex_event
, int from_tty
)
6326 char *trigger_func_name
, *nameptr
;
6327 struct symtabs_and_lines sals
;
6328 struct breakpoint
*b
;
6330 if (ex_event
== EX_EVENT_CATCH
)
6331 trigger_func_name
= xstrdup ("__cxa_begin_catch");
6333 trigger_func_name
= xstrdup ("__cxa_throw");
6335 nameptr
= trigger_func_name
;
6336 sals
= decode_line_1 (&nameptr
, 1, NULL
, 0, NULL
, NULL
);
6337 if (sals
.nelts
== 0)
6339 xfree (trigger_func_name
);
6343 b
= set_raw_breakpoint (sals
.sals
[0], bp_breakpoint
);
6344 set_breakpoint_count (breakpoint_count
+ 1);
6345 b
->number
= breakpoint_count
;
6347 b
->cond_string
= (cond_string
== NULL
) ?
6348 NULL
: savestring (cond_string
, strlen (cond_string
));
6350 b
->addr_string
= trigger_func_name
;
6351 b
->enable_state
= bp_enabled
;
6352 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6353 b
->ops
= &gnu_v3_exception_catchpoint_ops
;
6360 /* Deal with "catch catch" and "catch throw" commands */
6363 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6364 int tempflag
, int from_tty
)
6366 char *cond_string
= NULL
;
6367 struct symtab_and_line
*sal
= NULL
;
6369 ep_skip_leading_whitespace (&arg
);
6371 cond_string
= ep_parse_optional_if_clause (&arg
);
6373 if ((*arg
!= '\0') && !isspace (*arg
))
6374 error ("Junk at end of arguments.");
6376 if ((ex_event
!= EX_EVENT_THROW
) &&
6377 (ex_event
!= EX_EVENT_CATCH
))
6378 error ("Unsupported or unknown exception event; cannot catch it");
6380 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6383 /* See if we can find a callback routine */
6384 sal
= target_enable_exception_callback (ex_event
, 1);
6388 /* We have callbacks from the runtime system for exceptions.
6389 Set a breakpoint on the sal found, if no errors */
6390 if (sal
!= (struct symtab_and_line
*) -1)
6391 create_exception_catchpoint (tempflag
, cond_string
, ex_event
, sal
);
6393 return; /* something went wrong with setting up callbacks */
6396 warning ("Unsupported with this platform/compiler combination.");
6399 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6400 inside a catch_errors */
6403 cover_target_enable_exception_callback (void *arg
)
6405 args_for_catchpoint_enable
*args
= arg
;
6406 struct symtab_and_line
*sal
;
6407 sal
= target_enable_exception_callback (args
->kind
, args
->enable_p
);
6410 else if (sal
== (struct symtab_and_line
*) -1)
6413 return 1; /*is valid */
6417 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6420 /* The first argument may be an event name, such as "start" or "load".
6421 If so, then handle it as such. If it doesn't match an event name,
6422 then attempt to interpret it as an exception name. (This latter is
6423 the v4.16-and-earlier GDB meaning of the "catch" command.)
6425 First, try to find the bounds of what might be an event name. */
6426 char *arg1_start
= arg
;
6430 if (arg1_start
== NULL
)
6432 /* Old behaviour was to use pre-v-4.16 syntax */
6433 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6435 /* Now, this is not allowed */
6436 error ("Catch requires an event name.");
6439 arg1_end
= ep_find_event_name_end (arg1_start
);
6440 if (arg1_end
== NULL
)
6441 error ("catch requires an event");
6442 arg1_length
= arg1_end
+ 1 - arg1_start
;
6444 /* Try to match what we found against known event names. */
6445 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6447 error ("Catch of signal not yet implemented");
6449 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6451 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6452 tempflag
, from_tty
);
6454 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6456 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6457 tempflag
, from_tty
);
6459 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6461 error ("Catch of thread_start not yet implemented");
6463 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6465 error ("Catch of thread_exit not yet implemented");
6467 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6469 error ("Catch of thread_join not yet implemented");
6471 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6473 error ("Catch of start not yet implemented");
6475 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6477 error ("Catch of exit not yet implemented");
6479 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6481 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6483 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6485 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6487 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6489 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6491 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6493 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6495 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6497 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6499 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6501 error ("Catch of stop not yet implemented");
6504 /* This doesn't appear to be an event name */
6508 /* Pre-v.4.16 behaviour was to treat the argument
6509 as the name of an exception */
6510 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6511 /* Now this is not allowed */
6512 error ("Unknown event kind specified for catch");
6517 /* Used by the gui, could be made a worker for other things. */
6520 set_breakpoint_sal (struct symtab_and_line sal
)
6522 struct breakpoint
*b
;
6523 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6524 set_breakpoint_count (breakpoint_count
+ 1);
6525 b
->number
= breakpoint_count
;
6532 catch_command (char *arg
, int from_tty
)
6534 catch_command_1 (arg
, 0, from_tty
);
6539 tcatch_command (char *arg
, int from_tty
)
6541 catch_command_1 (arg
, 1, from_tty
);
6544 /* Delete breakpoints by address or line. */
6547 clear_command (char *arg
, int from_tty
)
6549 struct breakpoint
*b
, *tmp
, *prev
, *found
;
6551 struct symtabs_and_lines sals
;
6552 struct symtab_and_line sal
;
6557 sals
= decode_line_spec (arg
, 1);
6562 sals
.sals
= (struct symtab_and_line
*)
6563 xmalloc (sizeof (struct symtab_and_line
));
6564 make_cleanup (xfree
, sals
.sals
);
6565 init_sal (&sal
); /* initialize to zeroes */
6566 sal
.line
= default_breakpoint_line
;
6567 sal
.symtab
= default_breakpoint_symtab
;
6568 sal
.pc
= default_breakpoint_address
;
6569 if (sal
.symtab
== 0)
6570 error ("No source file specified.");
6578 /* For each line spec given, delete bps which correspond
6579 to it. Do it in two passes, solely to preserve the current
6580 behavior that from_tty is forced true if we delete more than
6584 for (i
= 0; i
< sals
.nelts
; i
++)
6586 /* If exact pc given, clear bpts at that pc.
6587 If line given (pc == 0), clear all bpts on specified line.
6588 If defaulting, clear all bpts on default line
6591 defaulting sal.pc != 0 tests to do
6596 1 0 <can't happen> */
6601 /* Find all matching breakpoints, remove them from the
6602 breakpoint chain, and add them to the 'found' chain. */
6603 ALL_BREAKPOINTS_SAFE (b
, tmp
)
6605 /* Are we going to delete b? */
6606 if (b
->type
!= bp_none
6607 && b
->type
!= bp_watchpoint
6608 && b
->type
!= bp_hardware_watchpoint
6609 && b
->type
!= bp_read_watchpoint
6610 && b
->type
!= bp_access_watchpoint
6611 /* Not if b is a watchpoint of any sort... */
6612 && (((sal
.pc
&& (b
->loc
->address
== sal
.pc
))
6613 && (!section_is_overlay (b
->loc
->section
)
6614 || b
->loc
->section
== sal
.section
))
6615 /* Yes, if sal.pc matches b (modulo overlays). */
6616 || ((default_match
|| (0 == sal
.pc
))
6617 && b
->source_file
!= NULL
6618 && sal
.symtab
!= NULL
6619 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6620 && b
->line_number
== sal
.line
)))
6621 /* Yes, if sal source file and line matches b. */
6623 /* Remove it from breakpoint_chain... */
6624 if (b
== breakpoint_chain
)
6626 /* b is at the head of the list */
6627 breakpoint_chain
= b
->next
;
6631 prev
->next
= b
->next
;
6633 /* And add it to 'found' chain. */
6639 /* Keep b, and keep a pointer to it. */
6644 /* Now go thru the 'found' chain and delete them. */
6648 error ("No breakpoint at %s.", arg
);
6650 error ("No breakpoint at this line.");
6654 from_tty
= 1; /* Always report if deleted more than one */
6656 printf_unfiltered ("Deleted breakpoint%s ", found
->next
? "s" : "");
6657 breakpoints_changed ();
6661 printf_unfiltered ("%d ", found
->number
);
6663 delete_breakpoint (found
);
6667 putchar_unfiltered ('\n');
6670 /* Delete breakpoint in BS if they are `delete' breakpoints and
6671 all breakpoints that are marked for deletion, whether hit or not.
6672 This is called after any breakpoint is hit, or after errors. */
6675 breakpoint_auto_delete (bpstat bs
)
6677 struct breakpoint
*b
, *temp
;
6679 for (; bs
; bs
= bs
->next
)
6680 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== disp_del
6682 delete_breakpoint (bs
->breakpoint_at
);
6684 ALL_BREAKPOINTS_SAFE (b
, temp
)
6686 if (b
->disposition
== disp_del_at_next_stop
)
6687 delete_breakpoint (b
);
6691 /* Delete a breakpoint and clean up all traces of it in the data
6695 delete_breakpoint (struct breakpoint
*bpt
)
6697 struct breakpoint
*b
;
6699 struct bp_location
*loc
;
6702 error ("Internal error (attempted to delete a NULL breakpoint)");
6705 /* Has this bp already been deleted? This can happen because multiple
6706 lists can hold pointers to bp's. bpstat lists are especial culprits.
6708 One example of this happening is a watchpoint's scope bp. When the
6709 scope bp triggers, we notice that the watchpoint is out of scope, and
6710 delete it. We also delete its scope bp. But the scope bp is marked
6711 "auto-deleting", and is already on a bpstat. That bpstat is then
6712 checked for auto-deleting bp's, which are deleted.
6714 A real solution to this problem might involve reference counts in bp's,
6715 and/or giving them pointers back to their referencing bpstat's, and
6716 teaching delete_breakpoint to only free a bp's storage when no more
6717 references were extent. A cheaper bandaid was chosen. */
6718 if (bpt
->type
== bp_none
)
6721 if (deprecated_delete_breakpoint_hook
)
6722 deprecated_delete_breakpoint_hook (bpt
);
6723 breakpoint_delete_event (bpt
->number
);
6725 if (bpt
->loc
->inserted
)
6726 remove_breakpoint (bpt
->loc
, mark_inserted
);
6728 free_valchain (bpt
->loc
);
6730 if (breakpoint_chain
== bpt
)
6731 breakpoint_chain
= bpt
->next
;
6733 if (bp_location_chain
== bpt
->loc
)
6734 bp_location_chain
= bpt
->loc
->next
;
6736 /* If we have callback-style exception catchpoints, don't go through
6737 the adjustments to the C++ runtime library etc. if the inferior
6738 isn't actually running. target_enable_exception_callback for a
6739 null target ops vector gives an undesirable error message, so we
6740 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6741 exceptions are supported in this way, it's OK for now. FIXME */
6742 if (ep_is_exception_catchpoint (bpt
) && target_has_execution
)
6744 /* Format possible error msg */
6745 char *message
= xstrprintf ("Error in deleting catchpoint %d:\n",
6747 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
6748 args_for_catchpoint_enable args
;
6749 args
.kind
= bpt
->type
== bp_catch_catch
?
6750 EX_EVENT_CATCH
: EX_EVENT_THROW
;
6752 catch_errors (cover_target_enable_exception_callback
, &args
,
6753 message
, RETURN_MASK_ALL
);
6754 do_cleanups (cleanups
);
6761 b
->next
= bpt
->next
;
6765 ALL_BP_LOCATIONS (loc
)
6766 if (loc
->next
== bpt
->loc
)
6768 loc
->next
= bpt
->loc
->next
;
6772 check_duplicates (bpt
);
6773 /* If this breakpoint was inserted, and there is another breakpoint
6774 at the same address, we need to insert the other breakpoint. */
6775 if (bpt
->loc
->inserted
6776 && bpt
->type
!= bp_hardware_watchpoint
6777 && bpt
->type
!= bp_read_watchpoint
6778 && bpt
->type
!= bp_access_watchpoint
6779 && bpt
->type
!= bp_catch_fork
6780 && bpt
->type
!= bp_catch_vfork
6781 && bpt
->type
!= bp_catch_exec
)
6784 if (b
->loc
->address
== bpt
->loc
->address
6785 && b
->loc
->section
== bpt
->loc
->section
6786 && !b
->loc
->duplicate
6787 && b
->enable_state
!= bp_disabled
6788 && b
->enable_state
!= bp_shlib_disabled
6790 && b
->enable_state
!= bp_call_disabled
)
6794 /* We should never reach this point if there is a permanent
6795 breakpoint at the same address as the one being deleted.
6796 If there is a permanent breakpoint somewhere, it should
6797 always be the only one inserted. */
6798 if (b
->enable_state
== bp_permanent
)
6799 internal_error (__FILE__
, __LINE__
,
6800 "another breakpoint was inserted on top of "
6801 "a permanent breakpoint");
6803 if (b
->type
== bp_hardware_breakpoint
)
6804 val
= target_insert_hw_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
6806 val
= target_insert_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
6808 /* If there was an error in the insert, print a message, then stop execution. */
6811 struct ui_file
*tmp_error_stream
= mem_fileopen ();
6812 make_cleanup_ui_file_delete (tmp_error_stream
);
6815 if (b
->type
== bp_hardware_breakpoint
)
6817 fprintf_unfiltered (tmp_error_stream
,
6818 "Cannot insert hardware breakpoint %d.\n"
6819 "You may have requested too many hardware breakpoints.\n",
6824 fprintf_unfiltered (tmp_error_stream
, "Cannot insert breakpoint %d.\n", b
->number
);
6825 fprintf_filtered (tmp_error_stream
, "Error accessing memory address ");
6826 print_address_numeric (b
->loc
->address
, 1, tmp_error_stream
);
6827 fprintf_filtered (tmp_error_stream
, ": %s.\n",
6828 safe_strerror (val
));
6831 fprintf_unfiltered (tmp_error_stream
,"The same program may be running in another process.");
6832 target_terminal_ours_for_output ();
6833 error_stream(tmp_error_stream
);
6836 b
->loc
->inserted
= 1;
6840 free_command_lines (&bpt
->commands
);
6843 if (bpt
->cond_string
!= NULL
)
6844 xfree (bpt
->cond_string
);
6845 if (bpt
->addr_string
!= NULL
)
6846 xfree (bpt
->addr_string
);
6847 if (bpt
->exp
!= NULL
)
6849 if (bpt
->exp_string
!= NULL
)
6850 xfree (bpt
->exp_string
);
6851 if (bpt
->val
!= NULL
)
6852 value_free (bpt
->val
);
6853 if (bpt
->source_file
!= NULL
)
6854 xfree (bpt
->source_file
);
6855 if (bpt
->dll_pathname
!= NULL
)
6856 xfree (bpt
->dll_pathname
);
6857 if (bpt
->triggered_dll_pathname
!= NULL
)
6858 xfree (bpt
->triggered_dll_pathname
);
6859 if (bpt
->exec_pathname
!= NULL
)
6860 xfree (bpt
->exec_pathname
);
6862 /* Be sure no bpstat's are pointing at it after it's been freed. */
6863 /* FIXME, how can we find all bpstat's?
6864 We just check stop_bpstat for now. */
6865 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
6866 if (bs
->breakpoint_at
== bpt
)
6868 bs
->breakpoint_at
= NULL
;
6870 /* bs->commands will be freed later. */
6872 /* On the chance that someone will soon try again to delete this same
6873 bp, we mark it as deleted before freeing its storage. */
6874 bpt
->type
= bp_none
;
6881 do_delete_breakpoint_cleanup (void *b
)
6883 delete_breakpoint (b
);
6887 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
6889 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
6893 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
6895 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
6899 delete_command (char *arg
, int from_tty
)
6901 struct breakpoint
*b
, *temp
;
6907 int breaks_to_delete
= 0;
6909 /* Delete all breakpoints if no argument.
6910 Do not delete internal or call-dummy breakpoints, these
6911 have to be deleted with an explicit breakpoint number argument. */
6914 if (b
->type
!= bp_call_dummy
&&
6915 b
->type
!= bp_shlib_event
&&
6916 b
->type
!= bp_thread_event
&&
6917 b
->type
!= bp_overlay_event
&&
6919 breaks_to_delete
= 1;
6922 /* Ask user only if there are some breakpoints to delete. */
6924 || (breaks_to_delete
&& query ("Delete all breakpoints? ")))
6926 ALL_BREAKPOINTS_SAFE (b
, temp
)
6928 if (b
->type
!= bp_call_dummy
&&
6929 b
->type
!= bp_shlib_event
&&
6930 b
->type
!= bp_thread_event
&&
6931 b
->type
!= bp_overlay_event
&&
6933 delete_breakpoint (b
);
6938 map_breakpoint_numbers (arg
, delete_breakpoint
);
6941 /* Reset a breakpoint given it's struct breakpoint * BINT.
6942 The value we return ends up being the return value from catch_errors.
6943 Unused in this case. */
6946 breakpoint_re_set_one (void *bint
)
6948 /* get past catch_errs */
6949 struct breakpoint
*b
= (struct breakpoint
*) bint
;
6953 int *not_found_ptr
= NULL
;
6954 struct symtabs_and_lines sals
;
6956 enum enable_state save_enable
;
6961 warning ("attempted to reset apparently deleted breakpoint #%d?",
6965 case bp_hardware_breakpoint
:
6967 case bp_catch_unload
:
6968 if (b
->addr_string
== NULL
)
6970 /* Anything without a string can't be re-set. */
6971 delete_breakpoint (b
);
6974 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
6976 ``And a hack it is, although Apple's Darwin version of GDB
6977 contains an almost identical hack to implement a "future
6978 break" command. It seems to work in many real world cases,
6979 but it is easy to come up with a test case where the patch
6980 doesn't help at all.''
6982 ``It seems that the way GDB implements breakpoints - in -
6983 shared - libraries was designed for a.out shared library
6984 systems (SunOS 4) where shared libraries were loaded at a
6985 fixed address in memory. Since ELF shared libraries can (and
6986 will) be loaded at any address in memory, things break.
6987 Fixing this is not trivial. Therefore, I'm not sure whether
6988 we should add this hack to the branch only. I cannot
6989 guarantee that things will be fixed on the trunk in the near
6992 In case we have a problem, disable this breakpoint. We'll
6993 restore its status if we succeed. Don't disable a
6994 shlib_disabled breakpoint though. There's a fair chance we
6995 can't re-set it if the shared library it's in hasn't been
7001 save_enable
= b
->enable_state
;
7002 if (b
->enable_state
!= bp_shlib_disabled
)
7003 b
->enable_state
= bp_disabled
;
7005 /* If resetting a shlib-disabled breakpoint, we don't want to
7006 see an error message if it is not found since we will expect
7007 this to occur until the shared library is finally reloaded.
7008 We accomplish this by giving decode_line_1 a pointer to use
7009 for silent notification that the symbol is not found. */
7010 not_found_ptr
= ¬_found
;
7012 set_language (b
->language
);
7013 input_radix
= b
->input_radix
;
7015 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
,
7017 for (i
= 0; i
< sals
.nelts
; i
++)
7019 resolve_sal_pc (&sals
.sals
[i
]);
7021 /* Reparse conditions, they might contain references to the
7023 if (b
->cond_string
!= NULL
)
7029 /* Avoid re-freeing b->exp if an error during the call
7033 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
7036 /* We need to re-set the breakpoint if the address changes... */
7037 if (b
->loc
->address
!= sals
.sals
[i
].pc
7038 /* ...or new and old breakpoints both have source files, and
7039 the source file name or the line number changes... */
7040 || (b
->source_file
!= NULL
7041 && sals
.sals
[i
].symtab
!= NULL
7042 && (strcmp (b
->source_file
, sals
.sals
[i
].symtab
->filename
) != 0
7043 || b
->line_number
!= sals
.sals
[i
].line
)
7045 /* ...or we switch between having a source file and not having
7047 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
7050 if (b
->source_file
!= NULL
)
7051 xfree (b
->source_file
);
7052 if (sals
.sals
[i
].symtab
== NULL
)
7053 b
->source_file
= NULL
;
7056 savestring (sals
.sals
[i
].symtab
->filename
,
7057 strlen (sals
.sals
[i
].symtab
->filename
));
7058 b
->line_number
= sals
.sals
[i
].line
;
7059 b
->loc
->requested_address
= sals
.sals
[i
].pc
;
7061 = adjust_breakpoint_address (b
->loc
->requested_address
,
7064 /* Used to check for duplicates here, but that can
7065 cause trouble, as it doesn't check for disabled
7070 /* Might be better to do this just once per breakpoint_re_set,
7071 rather than once for every breakpoint. */
7072 breakpoints_changed ();
7074 b
->loc
->section
= sals
.sals
[i
].section
;
7075 b
->enable_state
= save_enable
; /* Restore it, this worked. */
7078 /* Now that this is re-enabled, check_duplicates
7080 check_duplicates (b
);
7087 case bp_hardware_watchpoint
:
7088 case bp_read_watchpoint
:
7089 case bp_access_watchpoint
:
7090 innermost_block
= NULL
;
7091 /* The issue arises of what context to evaluate this in. The
7092 same one as when it was set, but what does that mean when
7093 symbols have been re-read? We could save the filename and
7094 functionname, but if the context is more local than that, the
7095 best we could do would be something like how many levels deep
7096 and which index at that particular level, but that's going to
7097 be less stable than filenames or function names. */
7099 /* So for now, just use a global context. */
7103 /* Avoid re-freeing b->exp if an error during the call to
7104 parse_expression. */
7107 b
->exp
= parse_expression (b
->exp_string
);
7108 b
->exp_valid_block
= innermost_block
;
7109 mark
= value_mark ();
7112 value_free (b
->val
);
7113 /* Avoid re-freeing b->val if an error during the call to
7114 evaluate_expression. */
7117 b
->val
= evaluate_expression (b
->exp
);
7118 release_value (b
->val
);
7119 if (VALUE_LAZY (b
->val
) && breakpoint_enabled (b
))
7120 value_fetch_lazy (b
->val
);
7122 if (b
->cond_string
!= NULL
)
7128 /* Avoid re-freeing b->exp if an error during the call
7132 b
->cond
= parse_exp_1 (&s
, (struct block
*) 0, 0);
7134 if (breakpoint_enabled (b
))
7136 value_free_to_mark (mark
);
7138 case bp_catch_catch
:
7139 case bp_catch_throw
:
7141 /* We needn't really do anything to reset these, since the mask
7142 that requests them is unaffected by e.g., new libraries being
7145 case bp_catch_vfork
:
7150 printf_filtered ("Deleting unknown breakpoint type %d\n", b
->type
);
7152 /* Delete longjmp and overlay event breakpoints; they will be
7153 reset later by breakpoint_re_set. */
7155 case bp_longjmp_resume
:
7156 case bp_overlay_event
:
7157 delete_breakpoint (b
);
7160 /* This breakpoint is special, it's set up when the inferior
7161 starts and we really don't want to touch it. */
7162 case bp_shlib_event
:
7164 /* Like bp_shlib_event, this breakpoint type is special.
7165 Once it is set up, we do not want to touch it. */
7166 case bp_thread_event
:
7168 /* Keep temporary breakpoints, which can be encountered when we step
7169 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7170 Otherwise these should have been blown away via the cleanup chain
7171 or by breakpoint_init_inferior when we rerun the executable. */
7174 case bp_watchpoint_scope
:
7176 case bp_step_resume
:
7183 /* Re-set all breakpoints after symbols have been re-loaded. */
7185 breakpoint_re_set (void)
7187 struct breakpoint
*b
, *temp
;
7188 enum language save_language
;
7189 int save_input_radix
;
7191 save_language
= current_language
->la_language
;
7192 save_input_radix
= input_radix
;
7193 ALL_BREAKPOINTS_SAFE (b
, temp
)
7195 /* Format possible error msg */
7196 char *message
= xstrprintf ("Error in re-setting breakpoint %d:\n",
7198 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7199 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7200 do_cleanups (cleanups
);
7202 set_language (save_language
);
7203 input_radix
= save_input_radix
;
7205 if (GET_LONGJMP_TARGET_P ())
7207 create_longjmp_breakpoint ("longjmp");
7208 create_longjmp_breakpoint ("_longjmp");
7209 create_longjmp_breakpoint ("siglongjmp");
7210 create_longjmp_breakpoint ("_siglongjmp");
7211 create_longjmp_breakpoint (NULL
);
7214 create_overlay_event_breakpoint ("_ovly_debug_event");
7217 /* Reset the thread number of this breakpoint:
7219 - If the breakpoint is for all threads, leave it as-is.
7220 - Else, reset it to the current thread for inferior_ptid. */
7222 breakpoint_re_set_thread (struct breakpoint
*b
)
7224 if (b
->thread
!= -1)
7226 if (in_thread_list (inferior_ptid
))
7227 b
->thread
= pid_to_thread_id (inferior_ptid
);
7231 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7232 If from_tty is nonzero, it prints a message to that effect,
7233 which ends with a period (no newline). */
7236 set_ignore_count (int bptnum
, int count
, int from_tty
)
7238 struct breakpoint
*b
;
7244 if (b
->number
== bptnum
)
7246 b
->ignore_count
= count
;
7250 printf_filtered ("Will stop next time breakpoint %d is reached.",
7252 else if (count
== 1)
7253 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7256 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7259 breakpoints_changed ();
7260 breakpoint_modify_event (b
->number
);
7264 error ("No breakpoint number %d.", bptnum
);
7267 /* Clear the ignore counts of all breakpoints. */
7269 breakpoint_clear_ignore_counts (void)
7271 struct breakpoint
*b
;
7274 b
->ignore_count
= 0;
7277 /* Command to set ignore-count of breakpoint N to COUNT. */
7280 ignore_command (char *args
, int from_tty
)
7286 error_no_arg ("a breakpoint number");
7288 num
= get_number (&p
);
7290 error ("bad breakpoint number: '%s'", args
);
7292 error ("Second argument (specified ignore-count) is missing.");
7294 set_ignore_count (num
,
7295 longest_to_int (value_as_long (parse_and_eval (p
))),
7298 printf_filtered ("\n");
7301 /* Call FUNCTION on each of the breakpoints
7302 whose numbers are given in ARGS. */
7305 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7310 struct breakpoint
*b
, *tmp
;
7314 error_no_arg ("one or more breakpoint numbers");
7321 num
= get_number_or_range (&p1
);
7324 warning ("bad breakpoint number at or near '%s'", p
);
7328 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7329 if (b
->number
== num
)
7331 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7334 if (related_breakpoint
)
7335 function (related_breakpoint
);
7339 printf_unfiltered ("No breakpoint number %d.\n", num
);
7345 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7346 If from_tty is nonzero, it prints a message to that effect,
7347 which ends with a period (no newline). */
7350 disable_breakpoint (struct breakpoint
*bpt
)
7352 /* Never disable a watchpoint scope breakpoint; we want to
7353 hit them when we leave scope so we can delete both the
7354 watchpoint and its scope breakpoint at that time. */
7355 if (bpt
->type
== bp_watchpoint_scope
)
7358 /* You can't disable permanent breakpoints. */
7359 if (bpt
->enable_state
== bp_permanent
)
7362 bpt
->enable_state
= bp_disabled
;
7364 check_duplicates (bpt
);
7366 if (deprecated_modify_breakpoint_hook
)
7367 deprecated_modify_breakpoint_hook (bpt
);
7368 breakpoint_modify_event (bpt
->number
);
7372 disable_command (char *args
, int from_tty
)
7374 struct breakpoint
*bpt
;
7376 ALL_BREAKPOINTS (bpt
)
7380 warning ("attempted to disable apparently deleted breakpoint #%d?",
7385 case bp_catch_unload
:
7387 case bp_catch_vfork
:
7389 case bp_catch_catch
:
7390 case bp_catch_throw
:
7391 case bp_hardware_breakpoint
:
7393 case bp_hardware_watchpoint
:
7394 case bp_read_watchpoint
:
7395 case bp_access_watchpoint
:
7396 disable_breakpoint (bpt
);
7401 map_breakpoint_numbers (args
, disable_breakpoint
);
7405 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7407 int target_resources_ok
, other_type_used
;
7410 if (bpt
->type
== bp_hardware_breakpoint
)
7413 i
= hw_breakpoint_used_count ();
7414 target_resources_ok
=
7415 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7417 if (target_resources_ok
== 0)
7418 error ("No hardware breakpoint support in the target.");
7419 else if (target_resources_ok
< 0)
7420 error ("Hardware breakpoints used exceeds limit.");
7425 if (bpt
->enable_state
!= bp_enabled
)
7427 /* When enabling a pending breakpoint, we need to check if the breakpoint
7428 is resolvable since shared libraries could have been loaded
7429 after the breakpoint was disabled. */
7430 breakpoints_changed ();
7431 if (resolve_pending_breakpoint (bpt
) == GDB_RC_OK
)
7433 delete_breakpoint (bpt
);
7436 bpt
->enable_state
= bp_enabled
;
7437 bpt
->disposition
= disposition
;
7440 else /* Not a pending breakpoint. */
7442 if (bpt
->enable_state
!= bp_permanent
)
7443 bpt
->enable_state
= bp_enabled
;
7444 bpt
->disposition
= disposition
;
7445 check_duplicates (bpt
);
7446 breakpoints_changed ();
7448 if (bpt
->type
== bp_watchpoint
||
7449 bpt
->type
== bp_hardware_watchpoint
||
7450 bpt
->type
== bp_read_watchpoint
||
7451 bpt
->type
== bp_access_watchpoint
)
7453 struct frame_id saved_frame_id
;
7455 saved_frame_id
= get_frame_id (get_selected_frame (NULL
));
7456 if (bpt
->exp_valid_block
!= NULL
)
7458 struct frame_info
*fr
=
7459 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7463 Cannot enable watchpoint %d because the block in which its expression\n\
7464 is valid is not currently in scope.\n", bpt
->number
);
7465 bpt
->enable_state
= bp_disabled
;
7471 value_free (bpt
->val
);
7472 mark
= value_mark ();
7473 bpt
->val
= evaluate_expression (bpt
->exp
);
7474 release_value (bpt
->val
);
7475 if (VALUE_LAZY (bpt
->val
))
7476 value_fetch_lazy (bpt
->val
);
7478 if (bpt
->type
== bp_hardware_watchpoint
||
7479 bpt
->type
== bp_read_watchpoint
||
7480 bpt
->type
== bp_access_watchpoint
)
7482 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7483 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7485 /* Hack around 'unused var' error for some targets here */
7487 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7488 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7489 /* we can consider of type is bp_hardware_watchpoint, convert to
7490 bp_watchpoint in the following condition */
7491 if (target_resources_ok
< 0)
7494 Cannot enable watchpoint %d because target watch resources\n\
7495 have been allocated for other watchpoints.\n", bpt
->number
);
7496 bpt
->enable_state
= bp_disabled
;
7497 value_free_to_mark (mark
);
7502 select_frame (frame_find_by_id (saved_frame_id
));
7503 value_free_to_mark (mark
);
7507 if (deprecated_modify_breakpoint_hook
)
7508 deprecated_modify_breakpoint_hook (bpt
);
7509 breakpoint_modify_event (bpt
->number
);
7513 enable_breakpoint (struct breakpoint
*bpt
)
7515 do_enable_breakpoint (bpt
, bpt
->disposition
);
7518 /* The enable command enables the specified breakpoints (or all defined
7519 breakpoints) so they once again become (or continue to be) effective
7520 in stopping the inferior. */
7523 enable_command (char *args
, int from_tty
)
7525 struct breakpoint
*bpt
;
7527 ALL_BREAKPOINTS (bpt
)
7531 warning ("attempted to enable apparently deleted breakpoint #%d?",
7536 case bp_catch_unload
:
7538 case bp_catch_vfork
:
7540 case bp_catch_catch
:
7541 case bp_catch_throw
:
7542 case bp_hardware_breakpoint
:
7544 case bp_hardware_watchpoint
:
7545 case bp_read_watchpoint
:
7546 case bp_access_watchpoint
:
7547 enable_breakpoint (bpt
);
7552 map_breakpoint_numbers (args
, enable_breakpoint
);
7556 enable_once_breakpoint (struct breakpoint
*bpt
)
7558 do_enable_breakpoint (bpt
, disp_disable
);
7562 enable_once_command (char *args
, int from_tty
)
7564 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7568 enable_delete_breakpoint (struct breakpoint
*bpt
)
7570 do_enable_breakpoint (bpt
, disp_del
);
7574 enable_delete_command (char *args
, int from_tty
)
7576 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7580 set_breakpoint_cmd (char *args
, int from_tty
)
7585 show_breakpoint_cmd (char *args
, int from_tty
)
7589 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7591 struct symtabs_and_lines
7592 decode_line_spec_1 (char *string
, int funfirstline
)
7594 struct symtabs_and_lines sals
;
7596 error ("Empty line specification.");
7597 if (default_breakpoint_valid
)
7598 sals
= decode_line_1 (&string
, funfirstline
,
7599 default_breakpoint_symtab
,
7600 default_breakpoint_line
,
7601 (char ***) NULL
, NULL
);
7603 sals
= decode_line_1 (&string
, funfirstline
,
7604 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
7606 error ("Junk at end of line specification: %s", string
);
7611 _initialize_breakpoint (void)
7613 static struct cmd_list_element
*breakpoint_set_cmdlist
;
7614 static struct cmd_list_element
*breakpoint_show_cmdlist
;
7615 struct cmd_list_element
*c
;
7618 observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib
);
7621 breakpoint_chain
= 0;
7622 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7623 before a breakpoint is set. */
7624 breakpoint_count
= 0;
7626 add_com ("ignore", class_breakpoint
, ignore_command
,
7627 "Set ignore-count of breakpoint number N to COUNT.\n\
7628 Usage is `ignore N COUNT'.");
7630 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
7632 add_com ("commands", class_breakpoint
, commands_command
,
7633 "Set commands to be executed when a breakpoint is hit.\n\
7634 Give breakpoint number as argument after \"commands\".\n\
7635 With no argument, the targeted breakpoint is the last one set.\n\
7636 The commands themselves follow starting on the next line.\n\
7637 Type a line containing \"end\" to indicate the end of them.\n\
7638 Give \"silent\" as the first line to make the breakpoint silent;\n\
7639 then no output is printed when it is hit, except what the commands print.");
7641 add_com ("condition", class_breakpoint
, condition_command
,
7642 "Specify breakpoint number N to break only if COND is true.\n\
7643 Usage is `condition N COND', where N is an integer and COND is an\n\
7644 expression to be evaluated whenever breakpoint N is reached.");
7646 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
,
7647 "Set a temporary breakpoint. Args like \"break\" command.\n\
7648 Like \"break\" except the breakpoint is only temporary,\n\
7649 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7650 by using \"enable delete\" on the breakpoint number.");
7651 set_cmd_completer (c
, location_completer
);
7653 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
,
7654 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7655 Like \"break\" except the breakpoint requires hardware support,\n\
7656 some target hardware may not have this support.");
7657 set_cmd_completer (c
, location_completer
);
7659 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
,
7660 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7661 Like \"hbreak\" except the breakpoint is only temporary,\n\
7662 so it will be deleted when hit.");
7663 set_cmd_completer (c
, location_completer
);
7665 add_prefix_cmd ("enable", class_breakpoint
, enable_command
,
7666 "Enable some breakpoints.\n\
7667 Give breakpoint numbers (separated by spaces) as arguments.\n\
7668 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7669 This is used to cancel the effect of the \"disable\" command.\n\
7670 With a subcommand you can enable temporarily.",
7671 &enablelist
, "enable ", 1, &cmdlist
);
7673 add_com ("ab", class_breakpoint
, enable_command
,
7674 "Enable some breakpoints.\n\
7675 Give breakpoint numbers (separated by spaces) as arguments.\n\
7676 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7677 This is used to cancel the effect of the \"disable\" command.\n\
7678 With a subcommand you can enable temporarily.");
7680 add_com_alias ("en", "enable", class_breakpoint
, 1);
7682 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
,
7683 "Enable some breakpoints.\n\
7684 Give breakpoint numbers (separated by spaces) as arguments.\n\
7685 This is used to cancel the effect of the \"disable\" command.\n\
7686 May be abbreviated to simply \"enable\".\n",
7687 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
7689 add_cmd ("once", no_class
, enable_once_command
,
7690 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7691 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7694 add_cmd ("delete", no_class
, enable_delete_command
,
7695 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7696 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7699 add_cmd ("delete", no_class
, enable_delete_command
,
7700 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7701 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7704 add_cmd ("once", no_class
, enable_once_command
,
7705 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7706 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7709 add_prefix_cmd ("disable", class_breakpoint
, disable_command
,
7710 "Disable some breakpoints.\n\
7711 Arguments are breakpoint numbers with spaces in between.\n\
7712 To disable all breakpoints, give no argument.\n\
7713 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7714 &disablelist
, "disable ", 1, &cmdlist
);
7715 add_com_alias ("dis", "disable", class_breakpoint
, 1);
7716 add_com_alias ("disa", "disable", class_breakpoint
, 1);
7718 add_com ("sb", class_breakpoint
, disable_command
,
7719 "Disable some breakpoints.\n\
7720 Arguments are breakpoint numbers with spaces in between.\n\
7721 To disable all breakpoints, give no argument.\n\
7722 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7724 add_cmd ("breakpoints", class_alias
, disable_command
,
7725 "Disable some breakpoints.\n\
7726 Arguments are breakpoint numbers with spaces in between.\n\
7727 To disable all breakpoints, give no argument.\n\
7728 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7729 This command may be abbreviated \"disable\".",
7732 add_prefix_cmd ("delete", class_breakpoint
, delete_command
,
7733 "Delete some breakpoints or auto-display expressions.\n\
7734 Arguments are breakpoint numbers with spaces in between.\n\
7735 To delete all breakpoints, give no argument.\n\
7737 Also a prefix command for deletion of other GDB objects.\n\
7738 The \"unset\" command is also an alias for \"delete\".",
7739 &deletelist
, "delete ", 1, &cmdlist
);
7740 add_com_alias ("d", "delete", class_breakpoint
, 1);
7742 add_com ("db", class_breakpoint
, delete_command
,
7743 "Delete some breakpoints.\n\
7744 Arguments are breakpoint numbers with spaces in between.\n\
7745 To delete all breakpoints, give no argument.\n");
7747 add_cmd ("breakpoints", class_alias
, delete_command
,
7748 "Delete some breakpoints or auto-display expressions.\n\
7749 Arguments are breakpoint numbers with spaces in between.\n\
7750 To delete all breakpoints, give no argument.\n\
7751 This command may be abbreviated \"delete\".",
7754 add_com ("clear", class_breakpoint
, clear_command
,
7755 concat ("Clear breakpoint at specified line or function.\n\
7756 Argument may be line number, function name, or \"*\" and an address.\n\
7757 If line number is specified, all breakpoints in that line are cleared.\n\
7758 If function is specified, breakpoints at beginning of function are cleared.\n\
7759 If an address is specified, breakpoints at that address are cleared.\n\n",
7760 "With no argument, clears all breakpoints in the line that the selected frame\n\
7763 See also the \"delete\" command which clears breakpoints by number.", NULL
));
7765 c
= add_com ("break", class_breakpoint
, break_command
,
7766 concat ("Set breakpoint at specified line or function.\n\
7767 Argument may be line number, function name, or \"*\" and an address.\n\
7768 If line number is specified, break at start of code for that line.\n\
7769 If function is specified, break at start of code for that function.\n\
7770 If an address is specified, break at that exact address.\n",
7771 "With no arg, uses current execution address of selected stack frame.\n\
7772 This is useful for breaking on return to a stack frame.\n\
7774 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7776 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL
));
7777 set_cmd_completer (c
, location_completer
);
7779 add_com_alias ("b", "break", class_run
, 1);
7780 add_com_alias ("br", "break", class_run
, 1);
7781 add_com_alias ("bre", "break", class_run
, 1);
7782 add_com_alias ("brea", "break", class_run
, 1);
7786 add_com_alias ("ba", "break", class_breakpoint
, 1);
7787 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
7792 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
,
7793 "Break in function/address or break at a line in the current file.",
7794 &stoplist
, "stop ", 1, &cmdlist
);
7795 add_cmd ("in", class_breakpoint
, stopin_command
,
7796 "Break in function or address.\n", &stoplist
);
7797 add_cmd ("at", class_breakpoint
, stopat_command
,
7798 "Break at a line in the current file.\n", &stoplist
);
7799 add_com ("status", class_info
, breakpoints_info
,
7800 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7801 The \"Type\" column indicates one of:\n\
7802 \tbreakpoint - normal breakpoint\n\
7803 \twatchpoint - watchpoint\n\
7804 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7805 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7806 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7807 address and file/line number respectively.\n\n",
7808 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7809 are set to the address of the last breakpoint listed.\n\n\
7810 Convenience variable \"$bpnum\" contains the number of the last\n\
7811 breakpoint set.", NULL
));
7814 add_info ("breakpoints", breakpoints_info
,
7815 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7816 The \"Type\" column indicates one of:\n\
7817 \tbreakpoint - normal breakpoint\n\
7818 \twatchpoint - watchpoint\n\
7819 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7820 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7821 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7822 address and file/line number respectively.\n\n",
7823 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7824 are set to the address of the last breakpoint listed.\n\n\
7825 Convenience variable \"$bpnum\" contains the number of the last\n\
7826 breakpoint set.", NULL
));
7829 add_com ("lb", class_breakpoint
, breakpoints_info
,
7830 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7831 The \"Type\" column indicates one of:\n\
7832 \tbreakpoint - normal breakpoint\n\
7833 \twatchpoint - watchpoint\n\
7834 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7835 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7836 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7837 address and file/line number respectively.\n\n",
7838 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7839 are set to the address of the last breakpoint listed.\n\n\
7840 Convenience variable \"$bpnum\" contains the number of the last\n\
7841 breakpoint set.", NULL
));
7843 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
,
7844 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7845 The \"Type\" column indicates one of:\n\
7846 \tbreakpoint - normal breakpoint\n\
7847 \twatchpoint - watchpoint\n\
7848 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7849 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7850 \tuntil - internal breakpoint used by the \"until\" command\n\
7851 \tfinish - internal breakpoint used by the \"finish\" command\n",
7852 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7853 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7854 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7855 address and file/line number respectively.\n\n",
7856 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7857 are set to the address of the last breakpoint listed.\n\n\
7858 Convenience variable \"$bpnum\" contains the number of the last\n\
7859 breakpoint set.", NULL
),
7860 &maintenanceinfolist
);
7862 add_com ("catch", class_breakpoint
, catch_command
,
7863 "Set catchpoints to catch events.\n\
7864 Raised signals may be caught:\n\
7865 \tcatch signal - all signals\n\
7866 \tcatch signal <signame> - a particular signal\n\
7867 Raised exceptions may be caught:\n\
7868 \tcatch throw - all exceptions, when thrown\n\
7869 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7870 \tcatch catch - all exceptions, when caught\n\
7871 \tcatch catch <exceptname> - a particular exception, when caught\n\
7872 Thread or process events may be caught:\n\
7873 \tcatch thread_start - any threads, just after creation\n\
7874 \tcatch thread_exit - any threads, just before expiration\n\
7875 \tcatch thread_join - any threads, just after joins\n\
7876 Process events may be caught:\n\
7877 \tcatch start - any processes, just after creation\n\
7878 \tcatch exit - any processes, just before expiration\n\
7879 \tcatch fork - calls to fork()\n\
7880 \tcatch vfork - calls to vfork()\n\
7881 \tcatch exec - calls to exec()\n\
7882 Dynamically-linked library events may be caught:\n\
7883 \tcatch load - loads of any library\n\
7884 \tcatch load <libname> - loads of a particular library\n\
7885 \tcatch unload - unloads of any library\n\
7886 \tcatch unload <libname> - unloads of a particular library\n\
7887 The act of your program's execution stopping may also be caught:\n\
7889 C++ exceptions may be caught:\n\
7890 \tcatch throw - all exceptions, when thrown\n\
7891 \tcatch catch - all exceptions, when caught\n\
7893 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7894 after a fork or vfork is caught.\n\n\
7895 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7897 add_com ("tcatch", class_breakpoint
, tcatch_command
,
7898 "Set temporary catchpoints to catch events.\n\
7899 Args like \"catch\" command.\n\
7900 Like \"catch\" except the catchpoint is only temporary,\n\
7901 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7902 by using \"enable delete\" on the catchpoint number.");
7904 c
= add_com ("watch", class_breakpoint
, watch_command
,
7905 "Set a watchpoint for an expression.\n\
7906 A watchpoint stops execution of your program whenever the value of\n\
7907 an expression changes.");
7908 set_cmd_completer (c
, location_completer
);
7910 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
,
7911 "Set a read watchpoint for an expression.\n\
7912 A watchpoint stops execution of your program whenever the value of\n\
7913 an expression is read.");
7914 set_cmd_completer (c
, location_completer
);
7916 c
= add_com ("awatch", class_breakpoint
, awatch_command
,
7917 "Set a watchpoint for an expression.\n\
7918 A watchpoint stops execution of your program whenever the value of\n\
7919 an expression is either read or written.");
7920 set_cmd_completer (c
, location_completer
);
7922 add_info ("watchpoints", breakpoints_info
,
7923 "Synonym for ``info breakpoints''.");
7926 c
= add_set_cmd ("can-use-hw-watchpoints", class_support
, var_zinteger
,
7927 (char *) &can_use_hw_watchpoints
,
7928 "Set debugger's willingness to use watchpoint hardware.\n\
7929 If zero, gdb will not use hardware for new watchpoints, even if\n\
7930 such is available. (However, any hardware watchpoints that were\n\
7931 created before setting this to nonzero, will continue to use watchpoint\n\
7934 deprecated_add_show_from_set (c
, &showlist
);
7936 can_use_hw_watchpoints
= 1;
7938 add_prefix_cmd ("breakpoint", class_maintenance
, set_breakpoint_cmd
, "\
7939 Breakpoint specific settings\n\
7940 Configure various breakpoint-specific variables such as\n\
7941 pending breakpoint behavior",
7942 &breakpoint_set_cmdlist
, "set breakpoint ",
7943 0/*allow-unknown*/, &setlist
);
7944 add_prefix_cmd ("breakpoint", class_maintenance
, show_breakpoint_cmd
, "\
7945 Breakpoint specific settings\n\
7946 Configure various breakpoint-specific variables such as\n\
7947 pending breakpoint behavior",
7948 &breakpoint_show_cmdlist
, "show breakpoint ",
7949 0/*allow-unknown*/, &showlist
);
7951 add_setshow_auto_boolean_cmd ("pending", no_class
, &pending_break_support
, "\
7952 Set debugger's behavior regarding pending breakpoints.", "\
7953 Show debugger's behavior regarding pending breakpoints.", "\
7954 If on, an unrecognized breakpoint location will cause gdb to create a\n\
7955 pending breakpoint. If off, an unrecognized breakpoint location results in\n\
7956 an error. If auto, an unrecognized breakpoint location results in a\n\
7957 user-query to see if a pending breakpoint should be created.", "\
7958 Debugger's behavior regarding pending breakpoints is %s.",
7960 &breakpoint_set_cmdlist
,
7961 &breakpoint_show_cmdlist
);
7963 pending_break_support
= AUTO_BOOLEAN_AUTO
;