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 Free Software
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"
52 #include "gdb-events.h"
54 /* Prototypes for local functions. */
56 static void until_break_command_continuation (struct continuation_arg
*arg
);
58 static void catch_command_1 (char *, int, int);
60 static void enable_delete_command (char *, int);
62 static void enable_delete_breakpoint (struct breakpoint
*);
64 static void enable_once_command (char *, int);
66 static void enable_once_breakpoint (struct breakpoint
*);
68 static void disable_command (char *, int);
70 static void enable_command (char *, int);
72 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
74 static void ignore_command (char *, int);
76 static int breakpoint_re_set_one (PTR
);
78 static void clear_command (char *, int);
80 static void catch_command (char *, int);
82 static void handle_gnu_4_16_catch_command (char *, int, int);
84 static struct symtabs_and_lines
get_catch_sals (int);
86 static void watch_command (char *, int);
88 static int can_use_hardware_watchpoint (struct value
*);
90 extern void break_at_finish_command (char *, int);
91 extern void break_at_finish_at_depth_command (char *, int);
93 extern void tbreak_at_finish_command (char *, int);
95 static void break_command_1 (char *, int, int);
97 static void mention (struct breakpoint
*);
99 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
101 static void check_duplicates (struct breakpoint
*);
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 (PTR
);
113 static void cleanup_executing_breakpoints (PTR
);
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 breakpoint
*, 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 (PTR
);
145 static int cover_target_enable_exception_callback (PTR
);
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 break_at_finish_at_depth_command_1 (char *arg
,
179 int flag
, int from_tty
);
181 static void break_at_finish_command_1 (char *arg
, int flag
, int from_tty
);
183 static void stop_command (char *arg
, int from_tty
);
185 static void stopin_command (char *arg
, int from_tty
);
187 static void stopat_command (char *arg
, int from_tty
);
189 static char *ep_find_event_name_end (char *arg
);
191 static char *ep_parse_optional_if_clause (char **arg
);
193 static char *ep_parse_optional_filename (char **arg
);
195 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
196 static void catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
);
199 static void create_exception_catchpoint (int tempflag
, char *cond_string
,
200 enum exception_event_kind ex_event
,
201 struct symtab_and_line
*sal
);
203 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
204 char *arg
, int tempflag
, int from_tty
);
206 static void tcatch_command (char *arg
, int from_tty
);
208 static void ep_skip_leading_whitespace (char **s
);
210 /* Prototypes for exported functions. */
212 /* If FALSE, gdb will not use hardware support for watchpoints, even
213 if such is available. */
214 static int can_use_hw_watchpoints
;
216 void _initialize_breakpoint (void);
218 extern int addressprint
; /* Print machine addresses? */
220 /* Are we executing breakpoint commands? */
221 static int executing_breakpoint_commands
;
223 /* Are overlay event breakpoints enabled? */
224 static int overlay_events_enabled
;
226 /* Walk the following statement or block through all breakpoints.
227 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
230 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
232 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
233 for (B = breakpoint_chain; \
234 B ? (TMP=B->next, 1): 0; \
237 /* True if SHIFT_INST_REGS defined, false otherwise. */
239 int must_shift_inst_regs
=
240 #if defined(SHIFT_INST_REGS)
247 /* True if breakpoint hit counts should be displayed in breakpoint info. */
249 int show_breakpoint_hit_counts
= 1;
251 /* Chain of all breakpoints defined. */
253 struct breakpoint
*breakpoint_chain
;
255 /* Number of last breakpoint made. */
257 int breakpoint_count
;
259 /* Pointer to current exception event record */
260 static struct exception_event_record
*current_exception_event
;
262 /* Indicator of whether exception catchpoints should be nuked
263 between runs of a program */
264 int exception_catchpoints_are_fragile
= 0;
266 /* Indicator of when exception catchpoints set-up should be
267 reinitialized -- e.g. when program is re-run */
268 int exception_support_initialized
= 0;
270 /* This function returns a pointer to the string representation of the
271 pathname of the dynamically-linked library that has just been
274 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
275 or undefined results are guaranteed.
277 This string's contents are only valid immediately after the
278 inferior has stopped in the dynamic linker hook, and becomes
279 invalid as soon as the inferior is continued. Clients should make
280 a copy of this string if they wish to continue the inferior and
281 then access the string. */
283 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
284 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
287 /* This function returns a pointer to the string representation of the
288 pathname of the dynamically-linked library that has just been
291 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
292 TRUE, or undefined results are guaranteed.
294 This string's contents are only valid immediately after the
295 inferior has stopped in the dynamic linker hook, and becomes
296 invalid as soon as the inferior is continued. Clients should make
297 a copy of this string if they wish to continue the inferior and
298 then access the string. */
300 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
301 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
304 /* This function is called by the "catch load" command. It allows the
305 debugger to be notified by the dynamic linker when a specified
306 library file (or any library file, if filename is NULL) is loaded. */
308 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
309 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
310 error ("catch of library loads not yet implemented on this platform")
313 /* This function is called by the "catch unload" command. It allows
314 the debugger to be notified by the dynamic linker when a specified
315 library file (or any library file, if filename is NULL) is
318 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
319 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \
320 error ("catch of library unloads not yet implemented on this platform")
323 /* Set breakpoint count to NUM. */
326 set_breakpoint_count (int num
)
328 breakpoint_count
= num
;
329 set_internalvar (lookup_internalvar ("bpnum"),
330 value_from_longest (builtin_type_int
, (LONGEST
) num
));
333 /* Used in run_command to zero the hit count when a new run starts. */
336 clear_breakpoint_hit_counts (void)
338 struct breakpoint
*b
;
344 /* Default address, symtab and line to put a breakpoint at
345 for "break" command with no arg.
346 if default_breakpoint_valid is zero, the other three are
347 not valid, and "break" with no arg is an error.
349 This set by print_stack_frame, which calls set_default_breakpoint. */
351 int default_breakpoint_valid
;
352 CORE_ADDR default_breakpoint_address
;
353 struct symtab
*default_breakpoint_symtab
;
354 int default_breakpoint_line
;
356 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
357 Advance *PP after the string and any trailing whitespace.
359 Currently the string can either be a number or "$" followed by the name
360 of a convenience variable. Making it an expression wouldn't work well
361 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
363 TRAILER is a character which can be found after the number; most
364 commonly this is `-'. If you don't want a trailer, use \0. */
366 get_number_trailer (char **pp
, int trailer
)
368 int retval
= 0; /* default */
372 /* Empty line means refer to the last breakpoint. */
373 return breakpoint_count
;
376 /* Make a copy of the name, so we can null-terminate it
377 to pass to lookup_internalvar(). */
382 while (isalnum (*p
) || *p
== '_')
384 varname
= (char *) alloca (p
- start
+ 1);
385 strncpy (varname
, start
, p
- start
);
386 varname
[p
- start
] = '\0';
387 val
= value_of_internalvar (lookup_internalvar (varname
));
388 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_INT
)
389 retval
= (int) value_as_long (val
);
392 printf_filtered ("Convenience variable must have integer value.\n");
400 while (*p
>= '0' && *p
<= '9')
403 /* There is no number here. (e.g. "cond a == b"). */
405 /* Skip non-numeric token */
406 while (*p
&& !isspace((int) *p
))
408 /* Return zero, which caller must interpret as error. */
414 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
416 /* Trailing junk: return 0 and let caller print error msg. */
417 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
428 /* Like get_number_trailer, but don't allow a trailer. */
430 get_number (char **pp
)
432 return get_number_trailer (pp
, '\0');
435 /* Parse a number or a range.
436 * A number will be of the form handled by get_number.
437 * A range will be of the form <number1> - <number2>, and
438 * will represent all the integers between number1 and number2,
441 * While processing a range, this fuction is called iteratively;
442 * At each call it will return the next value in the range.
444 * At the beginning of parsing a range, the char pointer PP will
445 * be advanced past <number1> and left pointing at the '-' token.
446 * Subsequent calls will not advance the pointer until the range
447 * is completed. The call that completes the range will advance
448 * pointer PP past <number2>.
452 get_number_or_range (char **pp
)
454 static int last_retval
, end_value
;
455 static char *end_ptr
;
456 static int in_range
= 0;
460 /* Default case: pp is pointing either to a solo number,
461 or to the first number of a range. */
462 last_retval
= get_number_trailer (pp
, '-');
467 /* This is the start of a range (<number1> - <number2>).
468 Skip the '-', parse and remember the second number,
469 and also remember the end of the final token. */
473 while (isspace ((int) *end_ptr
))
474 end_ptr
++; /* skip white space */
475 end_value
= get_number (temp
);
476 if (end_value
< last_retval
)
478 error ("inverted range");
480 else if (end_value
== last_retval
)
482 /* degenerate range (number1 == number2). Advance the
483 token pointer so that the range will be treated as a
492 error ("negative value");
495 /* pp points to the '-' that betokens a range. All
496 number-parsing has already been done. Return the next
497 integer value (one greater than the saved previous value).
498 Do not advance the token pointer 'pp' until the end of range
501 if (++last_retval
== end_value
)
503 /* End of range reached; advance token pointer. */
513 /* condition N EXP -- set break condition of breakpoint N to EXP. */
516 condition_command (char *arg
, int from_tty
)
518 register struct breakpoint
*b
;
523 error_no_arg ("breakpoint number");
526 bnum
= get_number (&p
);
528 error ("Bad breakpoint argument: '%s'", arg
);
531 if (b
->number
== bnum
)
538 if (b
->cond_string
!= NULL
)
539 xfree (b
->cond_string
);
544 b
->cond_string
= NULL
;
546 printf_filtered ("Breakpoint %d now unconditional.\n", bnum
);
551 /* I don't know if it matters whether this is the string the user
552 typed in or the decompiled expression. */
553 b
->cond_string
= savestring (arg
, strlen (arg
));
554 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->address
), 0);
556 error ("Junk at end of expression");
558 breakpoints_changed ();
559 breakpoint_modify_event (b
->number
);
563 error ("No breakpoint number %d.", bnum
);
568 commands_command (char *arg
, int from_tty
)
570 register struct breakpoint
*b
;
573 struct command_line
*l
;
575 /* If we allowed this, we would have problems with when to
576 free the storage, if we change the commands currently
579 if (executing_breakpoint_commands
)
580 error ("Can't use the \"commands\" command among a breakpoint's commands.");
583 bnum
= get_number (&p
);
586 error ("Unexpected extra arguments following breakpoint number.");
589 if (b
->number
== bnum
)
593 "Type commands for when breakpoint %d is hit, one per line.",
595 l
= read_command_lines (tmpbuf
, from_tty
);
596 free_command_lines (&b
->commands
);
598 breakpoints_changed ();
599 breakpoint_modify_event (b
->number
);
602 error ("No breakpoint number %d.", bnum
);
605 /* Like target_read_memory() but if breakpoints are inserted, return
606 the shadow contents instead of the breakpoints themselves.
608 Read "memory data" from whatever target or inferior we have.
609 Returns zero if successful, errno value if not. EIO is used
610 for address out of bounds. If breakpoints are inserted, returns
611 shadow contents, not the breakpoints themselves. From breakpoint.c. */
614 read_memory_nobpt (CORE_ADDR memaddr
, char *myaddr
, unsigned len
)
617 struct breakpoint
*b
;
618 CORE_ADDR bp_addr
= 0;
621 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
622 /* No breakpoints on this machine. */
623 return target_read_memory (memaddr
, myaddr
, len
);
627 if (b
->type
== bp_none
)
628 warning ("reading through apparently deleted breakpoint #%d?",
631 /* memory breakpoint? */
632 if (b
->type
== bp_watchpoint
633 || b
->type
== bp_hardware_watchpoint
634 || b
->type
== bp_read_watchpoint
635 || b
->type
== bp_access_watchpoint
)
640 /* Addresses and length of the part of the breakpoint that
642 /* XXXX The m68k, sh and h8300 have different local and remote
643 breakpoint values. BREAKPOINT_FROM_PC still manages to
644 correctly determine the breakpoints memory address and size
645 for these targets. */
646 bp_addr
= b
->address
;
648 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
653 if (bp_addr
+ bp_size
<= memaddr
)
654 /* The breakpoint is entirely before the chunk of memory we
657 if (bp_addr
>= memaddr
+ len
)
658 /* The breakpoint is entirely after the chunk of memory we are
661 /* Copy the breakpoint from the shadow contents, and recurse for
662 the things before and after. */
664 /* Offset within shadow_contents. */
667 if (bp_addr
< memaddr
)
669 /* Only copy the second part of the breakpoint. */
670 bp_size
-= memaddr
- bp_addr
;
671 bptoffset
= memaddr
- bp_addr
;
675 if (bp_addr
+ bp_size
> memaddr
+ len
)
677 /* Only copy the first part of the breakpoint. */
678 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
681 memcpy (myaddr
+ bp_addr
- memaddr
,
682 b
->shadow_contents
+ bptoffset
, bp_size
);
684 if (bp_addr
> memaddr
)
686 /* Copy the section of memory before the breakpoint. */
687 status
= read_memory_nobpt (memaddr
, myaddr
, bp_addr
- memaddr
);
692 if (bp_addr
+ bp_size
< memaddr
+ len
)
694 /* Copy the section of memory after the breakpoint. */
695 status
= read_memory_nobpt (bp_addr
+ bp_size
,
696 myaddr
+ bp_addr
+ bp_size
- memaddr
,
697 memaddr
+ len
- (bp_addr
+ bp_size
));
704 /* Nothing overlaps. Just call read_memory_noerr. */
705 return target_read_memory (memaddr
, myaddr
, len
);
709 /* insert_breakpoints is used when starting or continuing the program.
710 remove_breakpoints is used when the program stops.
711 Both return zero if successful,
712 or an `errno' value if could not write the inferior. */
715 insert_breakpoints (void)
717 register struct breakpoint
*b
, *temp
;
718 int return_val
= 0; /* return success code. */
720 int disabled_breaks
= 0;
721 int hw_breakpoint_error
= 0;
722 #ifdef ONE_PROCESS_WRITETEXT
723 int process_warning
= 0;
726 static char message1
[] = "Error inserting catchpoint %d:\n";
727 static char message
[sizeof (message1
) + 30];
729 struct ui_file
*tmp_error_stream
= mem_fileopen ();
730 make_cleanup_ui_file_delete (tmp_error_stream
);
732 /* Explicitly mark the warning -- this will only be printed if
733 there was an error. */
734 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
736 ALL_BREAKPOINTS_SAFE (b
, temp
)
738 if (b
->enable_state
== bp_permanent
)
739 /* Permanent breakpoints cannot be inserted or removed. */
741 if ((b
->type
== bp_watchpoint
742 || b
->type
== bp_hardware_watchpoint
743 || b
->type
== bp_read_watchpoint
744 || b
->type
== bp_access_watchpoint
) && (!b
->val
))
747 val
= evaluate_expression (b
->exp
);
749 if (VALUE_LAZY (val
))
750 value_fetch_lazy (val
);
753 if (b
->type
!= bp_watchpoint
754 && b
->type
!= bp_hardware_watchpoint
755 && b
->type
!= bp_read_watchpoint
756 && b
->type
!= bp_access_watchpoint
757 && b
->type
!= bp_catch_fork
758 && b
->type
!= bp_catch_vfork
759 && b
->type
!= bp_catch_exec
760 && b
->type
!= bp_catch_throw
761 && b
->type
!= bp_catch_catch
762 && b
->enable_state
!= bp_disabled
763 && b
->enable_state
!= bp_shlib_disabled
764 && b
->enable_state
!= bp_call_disabled
768 /* "Normal" instruction breakpoint: either the standard
769 trap-instruction bp (bp_breakpoint), or a
770 bp_hardware_breakpoint. */
772 /* First check to see if we have to handle an overlay. */
773 if (overlay_debugging
== ovly_off
774 || b
->section
== NULL
775 || !(section_is_overlay (b
->section
)))
777 /* No overlay handling: just set the breakpoint. */
779 if (b
->type
== bp_hardware_breakpoint
)
780 val
= target_insert_hw_breakpoint (b
->address
,
783 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
787 /* This breakpoint is in an overlay section.
788 Shall we set a breakpoint at the LMA? */
789 if (!overlay_events_enabled
)
791 /* Yes -- overlay event support is not active,
792 so we must try to set a breakpoint at the LMA.
793 This will not work for a hardware breakpoint. */
794 if (b
->type
== bp_hardware_breakpoint
)
795 warning ("hardware breakpoint %d not supported in overlay!\n",
799 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
801 /* Set a software (trap) breakpoint at the LMA. */
802 val
= target_insert_breakpoint (addr
, b
->shadow_contents
);
804 fprintf_unfiltered (tmp_error_stream
,
805 "Overlay breakpoint %d failed: in ROM?",
809 /* Shall we set a breakpoint at the VMA? */
810 if (section_is_mapped (b
->section
))
812 /* Yes. This overlay section is mapped into memory. */
813 if (b
->type
== bp_hardware_breakpoint
)
814 val
= target_insert_hw_breakpoint (b
->address
,
817 val
= target_insert_breakpoint (b
->address
,
822 /* No. This breakpoint will not be inserted.
823 No error, but do not mark the bp as 'inserted'. */
830 /* Can't set the breakpoint. */
831 #if defined (DISABLE_UNSETTABLE_BREAK)
832 if (DISABLE_UNSETTABLE_BREAK (b
->address
))
834 /* See also: disable_breakpoints_in_shlibs. */
836 b
->enable_state
= bp_shlib_disabled
;
837 if (!disabled_breaks
)
839 fprintf_unfiltered (tmp_error_stream
,
840 "Cannot insert breakpoint %d.\n",
842 fprintf_unfiltered (tmp_error_stream
,
843 "Temporarily disabling shared library breakpoints:\n");
846 fprintf_unfiltered (tmp_error_stream
,
847 "breakpoint #%d\n", b
->number
);
852 #ifdef ONE_PROCESS_WRITETEXT
855 if (b
->type
== bp_hardware_breakpoint
)
857 hw_breakpoint_error
= 1;
858 fprintf_unfiltered (tmp_error_stream
,
859 "Cannot insert hardware breakpoint %d.\n",
864 fprintf_unfiltered (tmp_error_stream
,
865 "Cannot insert breakpoint %d.\n",
867 fprintf_filtered (tmp_error_stream
,
868 "Error accessing memory address ");
869 print_address_numeric (b
->address
, 1, tmp_error_stream
);
870 fprintf_filtered (tmp_error_stream
, ": %s.\n",
871 safe_strerror (val
));
880 return_val
= val
; /* remember failure */
882 else if (ep_is_exception_catchpoint (b
)
883 && b
->enable_state
!= bp_disabled
884 && b
->enable_state
!= bp_shlib_disabled
885 && b
->enable_state
!= bp_call_disabled
890 /* If we get here, we must have a callback mechanism for exception
891 events -- with g++ style embedded label support, we insert
892 ordinary breakpoints and not catchpoints. */
893 /* Format possible error message */
894 sprintf (message
, message1
, b
->number
);
896 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
899 /* Couldn't set breakpoint for some reason */
900 fprintf_unfiltered (tmp_error_stream
,
901 "Cannot insert catchpoint %d; disabling it.\n",
903 fprintf_filtered (tmp_error_stream
,
904 "Error accessing memory address ");
905 print_address_numeric (b
->address
, 1, tmp_error_stream
);
906 fprintf_filtered (tmp_error_stream
, ": %s.\n",
907 safe_strerror (val
));
908 b
->enable_state
= bp_disabled
;
912 /* Bp set, now make sure callbacks are enabled */
914 args_for_catchpoint_enable args
;
915 args
.kind
= b
->type
== bp_catch_catch
?
916 EX_EVENT_CATCH
: EX_EVENT_THROW
;
918 val
= catch_errors (cover_target_enable_exception_callback
,
920 message
, RETURN_MASK_ALL
);
921 if (val
!= 0 && val
!= -1)
925 /* Check if something went wrong; val == 0 can be ignored */
928 /* something went wrong */
929 fprintf_unfiltered (tmp_error_stream
,
930 "Cannot insert catchpoint %d; disabling it.\n",
932 b
->enable_state
= bp_disabled
;
937 return_val
= val
; /* remember failure */
940 else if ((b
->type
== bp_hardware_watchpoint
||
941 b
->type
== bp_read_watchpoint
||
942 b
->type
== bp_access_watchpoint
)
943 && b
->enable_state
== bp_enabled
944 && b
->disposition
!= disp_del_at_next_stop
948 struct frame_info
*saved_frame
;
949 int saved_level
, within_current_scope
;
950 struct value
*mark
= value_mark ();
953 /* Save the current frame and level so we can restore it after
954 evaluating the watchpoint expression on its own frame. */
955 saved_frame
= deprecated_selected_frame
;
956 saved_level
= frame_relative_level (deprecated_selected_frame
);
958 /* Determine if the watchpoint is within scope. */
959 if (b
->exp_valid_block
== NULL
)
960 within_current_scope
= 1;
963 struct frame_info
*fi
;
964 fi
= frame_find_by_id (b
->watchpoint_frame
);
965 within_current_scope
= (fi
!= NULL
);
966 if (within_current_scope
)
970 if (within_current_scope
)
972 /* Evaluate the expression and cut the chain of values
973 produced off from the value chain.
975 Make sure the value returned isn't lazy; we use
976 laziness to determine what memory GDB actually needed
977 in order to compute the value of the expression. */
978 v
= evaluate_expression (b
->exp
);
980 value_release_to_mark (mark
);
985 /* Look at each value on the value chain. */
986 for (; v
; v
= v
->next
)
988 /* If it's a memory location, and GDB actually needed
989 its contents to evaluate the expression, then we
991 if (VALUE_LVAL (v
) == lval_memory
994 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
996 /* We only watch structs and arrays if user asked
997 for it explicitly, never if they just happen to
998 appear in the middle of some value chain. */
999 if (v
== b
->val_chain
1000 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1001 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1006 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
1007 len
= TYPE_LENGTH (VALUE_TYPE (v
));
1009 if (b
->type
== bp_read_watchpoint
)
1011 else if (b
->type
== bp_access_watchpoint
)
1014 val
= target_insert_watchpoint (addr
, len
, type
);
1017 /* Don't exit the loop, try to insert
1018 every value on the value chain. That's
1019 because we will be removing all the
1020 watches below, and removing a
1021 watchpoint we didn't insert could have
1029 /* Failure to insert a watchpoint on any memory value in the
1030 value chain brings us here. */
1033 remove_breakpoint (b
, mark_uninserted
);
1034 hw_breakpoint_error
= 1;
1035 fprintf_unfiltered (tmp_error_stream
,
1036 "Could not insert hardware watchpoint %d.\n",
1043 printf_filtered ("Hardware watchpoint %d deleted ", b
->number
);
1044 printf_filtered ("because the program has left the block \n");
1045 printf_filtered ("in which its expression is valid.\n");
1046 if (b
->related_breakpoint
)
1047 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1048 b
->disposition
= disp_del_at_next_stop
;
1051 /* Restore the frame and level. */
1052 if ((saved_frame
!= deprecated_selected_frame
) ||
1053 (saved_level
!= frame_relative_level (deprecated_selected_frame
)))
1054 select_frame (saved_frame
);
1057 return_val
= val
; /* remember failure */
1059 else if ((b
->type
== bp_catch_fork
1060 || b
->type
== bp_catch_vfork
1061 || b
->type
== bp_catch_exec
)
1062 && b
->enable_state
== bp_enabled
1070 val
= target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
1072 case bp_catch_vfork
:
1073 val
= target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
1076 val
= target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
1079 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1084 fprintf_unfiltered (tmp_error_stream
,
1085 "Cannot insert catchpoint %d.", b
->number
);
1091 return_val
= val
; /* remember failure */
1097 /* If a hardware breakpoint or watchpoint was inserted, add a
1098 message about possibly exhausted resources. */
1099 if (hw_breakpoint_error
)
1101 fprintf_unfiltered (tmp_error_stream
,
1102 "Could not insert hardware breakpoints:\n\
1103 You may have requested too many hardware breakpoints/watchpoints.\n");
1105 #ifdef ONE_PROCESS_WRITETEXT
1106 if (process_warning
)
1107 fprintf_unfiltered (tmp_error_stream
,
1108 "The same program may be running in another process.");
1110 target_terminal_ours_for_output ();
1111 error_stream (tmp_error_stream
);
1117 remove_breakpoints (void)
1119 register struct breakpoint
*b
;
1126 val
= remove_breakpoint (b
, mark_uninserted
);
1135 remove_hw_watchpoints (void)
1137 register struct breakpoint
*b
;
1143 && (b
->type
== bp_hardware_watchpoint
1144 || b
->type
== bp_read_watchpoint
1145 || b
->type
== bp_access_watchpoint
))
1147 val
= remove_breakpoint (b
, mark_uninserted
);
1156 reattach_breakpoints (int pid
)
1158 register struct breakpoint
*b
;
1160 struct cleanup
*old_chain
= save_inferior_ptid ();
1162 /* Set inferior_ptid; remove_breakpoint uses this global. */
1163 inferior_ptid
= pid_to_ptid (pid
);
1168 remove_breakpoint (b
, mark_inserted
);
1169 if (b
->type
== bp_hardware_breakpoint
)
1170 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
1172 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
1175 do_cleanups (old_chain
);
1180 do_cleanups (old_chain
);
1185 update_breakpoints_after_exec (void)
1187 struct breakpoint
*b
;
1188 struct breakpoint
*temp
;
1190 /* Doing this first prevents the badness of having delete_breakpoint()
1191 write a breakpoint's current "shadow contents" to lift the bp. That
1192 shadow is NOT valid after an exec()! */
1193 mark_breakpoints_out ();
1195 ALL_BREAKPOINTS_SAFE (b
, temp
)
1197 /* Solib breakpoints must be explicitly reset after an exec(). */
1198 if (b
->type
== bp_shlib_event
)
1200 delete_breakpoint (b
);
1204 /* Thread event breakpoints must be set anew after an exec(),
1205 as must overlay event breakpoints. */
1206 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1208 delete_breakpoint (b
);
1212 /* Step-resume breakpoints are meaningless after an exec(). */
1213 if (b
->type
== bp_step_resume
)
1215 delete_breakpoint (b
);
1219 /* Ditto the sigtramp handler breakpoints. */
1220 if (b
->type
== bp_through_sigtramp
)
1222 delete_breakpoint (b
);
1226 /* Ditto the exception-handling catchpoints. */
1227 if ((b
->type
== bp_catch_catch
) || (b
->type
== bp_catch_throw
))
1229 delete_breakpoint (b
);
1233 /* Don't delete an exec catchpoint, because else the inferior
1234 won't stop when it ought!
1236 Similarly, we probably ought to keep vfork catchpoints, 'cause
1237 on this target, we may not be able to stop when the vfork is
1238 seen, but only when the subsequent exec is seen. (And because
1239 deleting fork catchpoints here but not vfork catchpoints will
1240 seem mysterious to users, keep those too.)
1242 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1243 target address field, if any, is sufficient to have it be reset
1244 automagically. Certainly on HP-UX that's true.
1246 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1247 valid code address on some platforms (like the mn10200 and
1248 mn10300 simulators). We shouldn't assign any special
1249 interpretation to a breakpoint with a zero address. And in
1250 fact, GDB doesn't --- I can't see what that comment above is
1251 talking about. As far as I can tell, setting the address of a
1252 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1253 is meaningless, since those are implemented with HP-UX kernel
1254 hackery, not by storing breakpoint instructions somewhere. */
1255 if ((b
->type
== bp_catch_exec
) ||
1256 (b
->type
== bp_catch_vfork
) ||
1257 (b
->type
== bp_catch_fork
))
1259 b
->address
= (CORE_ADDR
) NULL
;
1263 /* bp_finish is a special case. The only way we ought to be able
1264 to see one of these when an exec() has happened, is if the user
1265 caught a vfork, and then said "finish". Ordinarily a finish just
1266 carries them to the call-site of the current callee, by setting
1267 a temporary bp there and resuming. But in this case, the finish
1268 will carry them entirely through the vfork & exec.
1270 We don't want to allow a bp_finish to remain inserted now. But
1271 we can't safely delete it, 'cause finish_command has a handle to
1272 the bp on a bpstat, and will later want to delete it. There's a
1273 chance (and I've seen it happen) that if we delete the bp_finish
1274 here, that its storage will get reused by the time finish_command
1275 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1276 We really must allow finish_command to delete a bp_finish.
1278 In the absense of a general solution for the "how do we know
1279 it's safe to delete something others may have handles to?"
1280 problem, what we'll do here is just uninsert the bp_finish, and
1281 let finish_command delete it.
1283 (We know the bp_finish is "doomed" in the sense that it's
1284 momentary, and will be deleted as soon as finish_command sees
1285 the inferior stopped. So it doesn't matter that the bp's
1286 address is probably bogus in the new a.out, unlike e.g., the
1287 solib breakpoints.) */
1289 if (b
->type
== bp_finish
)
1294 /* Without a symbolic address, we have little hope of the
1295 pre-exec() address meaning the same thing in the post-exec()
1297 if (b
->addr_string
== NULL
)
1299 delete_breakpoint (b
);
1303 /* If this breakpoint has survived the above battery of checks, then
1304 it must have a symbolic address. Be sure that it gets reevaluated
1305 to a target address, rather than reusing the old evaluation.
1307 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1308 for bp_catch_exec and friends, I'm pretty sure this is entirely
1309 unnecessary. A call to breakpoint_re_set_one always recomputes
1310 the breakpoint's address from scratch, or deletes it if it can't.
1311 So I think this assignment could be deleted without effect. */
1312 b
->address
= (CORE_ADDR
) NULL
;
1314 /* FIXME what about longjmp breakpoints? Re-create them here? */
1315 create_overlay_event_breakpoint ("_ovly_debug_event");
1319 detach_breakpoints (int pid
)
1321 register struct breakpoint
*b
;
1323 struct cleanup
*old_chain
= save_inferior_ptid ();
1325 if (pid
== PIDGET (inferior_ptid
))
1326 error ("Cannot detach breakpoints of inferior_ptid");
1328 /* Set inferior_ptid; remove_breakpoint uses this global. */
1329 inferior_ptid
= pid_to_ptid (pid
);
1334 val
= remove_breakpoint (b
, mark_inserted
);
1337 do_cleanups (old_chain
);
1342 do_cleanups (old_chain
);
1347 remove_breakpoint (struct breakpoint
*b
, insertion_state_t is
)
1351 if (b
->enable_state
== bp_permanent
)
1352 /* Permanent breakpoints cannot be inserted or removed. */
1355 if (b
->type
== bp_none
)
1356 warning ("attempted to remove apparently deleted breakpoint #%d?",
1359 if (b
->type
!= bp_watchpoint
1360 && b
->type
!= bp_hardware_watchpoint
1361 && b
->type
!= bp_read_watchpoint
1362 && b
->type
!= bp_access_watchpoint
1363 && b
->type
!= bp_catch_fork
1364 && b
->type
!= bp_catch_vfork
1365 && b
->type
!= bp_catch_exec
1366 && b
->type
!= bp_catch_catch
1367 && b
->type
!= bp_catch_throw
)
1369 /* "Normal" instruction breakpoint: either the standard
1370 trap-instruction bp (bp_breakpoint), or a
1371 bp_hardware_breakpoint. */
1373 /* First check to see if we have to handle an overlay. */
1374 if (overlay_debugging
== ovly_off
1375 || b
->section
== NULL
1376 || !(section_is_overlay (b
->section
)))
1378 /* No overlay handling: just remove the breakpoint. */
1380 if (b
->type
== bp_hardware_breakpoint
)
1381 val
= target_remove_hw_breakpoint (b
->address
,
1382 b
->shadow_contents
);
1384 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1388 /* This breakpoint is in an overlay section.
1389 Did we set a breakpoint at the LMA? */
1390 if (!overlay_events_enabled
)
1392 /* Yes -- overlay event support is not active, so we
1393 should have set a breakpoint at the LMA. Remove it.
1395 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
1397 /* Ignore any failures: if the LMA is in ROM, we will
1398 have already warned when we failed to insert it. */
1399 if (b
->type
!= bp_hardware_breakpoint
)
1400 target_remove_hw_breakpoint (addr
, b
->shadow_contents
);
1402 target_remove_breakpoint (addr
, b
->shadow_contents
);
1404 /* Did we set a breakpoint at the VMA?
1405 If so, we will have marked the breakpoint 'inserted'. */
1408 /* Yes -- remove it. Previously we did not bother to
1409 remove the breakpoint if the section had been
1410 unmapped, but let's not rely on that being safe. We
1411 don't know what the overlay manager might do. */
1412 if (b
->type
== bp_hardware_breakpoint
)
1413 val
= target_remove_hw_breakpoint (b
->address
,
1414 b
->shadow_contents
);
1416 val
= target_remove_breakpoint (b
->address
,
1417 b
->shadow_contents
);
1421 /* No -- not inserted, so no need to remove. No error. */
1427 b
->inserted
= (is
== mark_inserted
);
1429 else if ((b
->type
== bp_hardware_watchpoint
||
1430 b
->type
== bp_read_watchpoint
||
1431 b
->type
== bp_access_watchpoint
)
1432 && b
->enable_state
== bp_enabled
1438 b
->inserted
= (is
== mark_inserted
);
1439 /* Walk down the saved value chain. */
1440 for (v
= b
->val_chain
; v
; v
= v
->next
)
1442 /* For each memory reference remove the watchpoint
1444 if (VALUE_LVAL (v
) == lval_memory
1445 && ! VALUE_LAZY (v
))
1447 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
1449 if (v
== b
->val_chain
1450 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1451 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1456 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
1457 len
= TYPE_LENGTH (VALUE_TYPE (v
));
1459 if (b
->type
== bp_read_watchpoint
)
1461 else if (b
->type
== bp_access_watchpoint
)
1464 val
= target_remove_watchpoint (addr
, len
, type
);
1471 /* Failure to remove any of the hardware watchpoints comes here. */
1472 if ((is
== mark_uninserted
) && (b
->inserted
))
1473 warning ("Could not remove hardware watchpoint %d.",
1476 /* Free the saved value chain. We will construct a new one
1477 the next time the watchpoint is inserted. */
1478 for (v
= b
->val_chain
; v
; v
= n
)
1483 b
->val_chain
= NULL
;
1485 else if ((b
->type
== bp_catch_fork
||
1486 b
->type
== bp_catch_vfork
||
1487 b
->type
== bp_catch_exec
)
1488 && b
->enable_state
== bp_enabled
1495 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1497 case bp_catch_vfork
:
1498 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1501 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1504 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1509 b
->inserted
= (is
== mark_inserted
);
1511 else if ((b
->type
== bp_catch_catch
||
1512 b
->type
== bp_catch_throw
)
1513 && b
->enable_state
== bp_enabled
1517 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1520 b
->inserted
= (is
== mark_inserted
);
1522 else if (ep_is_exception_catchpoint (b
)
1523 && b
->inserted
/* sometimes previous insert doesn't happen */
1524 && b
->enable_state
== bp_enabled
1528 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1532 b
->inserted
= (is
== mark_inserted
);
1538 /* Clear the "inserted" flag in all breakpoints. */
1541 mark_breakpoints_out (void)
1543 register struct breakpoint
*b
;
1549 /* Clear the "inserted" flag in all breakpoints and delete any
1550 breakpoints which should go away between runs of the program.
1552 Plus other such housekeeping that has to be done for breakpoints
1555 Note: this function gets called at the end of a run (by
1556 generic_mourn_inferior) and when a run begins (by
1557 init_wait_for_inferior). */
1562 breakpoint_init_inferior (enum inf_context context
)
1564 register struct breakpoint
*b
, *temp
;
1565 static int warning_needed
= 0;
1567 ALL_BREAKPOINTS_SAFE (b
, temp
)
1574 case bp_watchpoint_scope
:
1576 /* If the call dummy breakpoint is at the entry point it will
1577 cause problems when the inferior is rerun, so we better
1580 Also get rid of scope breakpoints. */
1581 delete_breakpoint (b
);
1585 case bp_hardware_watchpoint
:
1586 case bp_read_watchpoint
:
1587 case bp_access_watchpoint
:
1589 /* Likewise for watchpoints on local expressions. */
1590 if (b
->exp_valid_block
!= NULL
)
1591 delete_breakpoint (b
);
1592 if (context
== inf_starting
)
1594 /* Reset val field to force reread of starting value
1595 in insert_breakpoints. */
1597 value_free (b
->val
);
1602 /* Likewise for exception catchpoints in dynamic-linked
1603 executables where required */
1604 if (ep_is_exception_catchpoint (b
) &&
1605 exception_catchpoints_are_fragile
)
1608 delete_breakpoint (b
);
1614 if (exception_catchpoints_are_fragile
)
1615 exception_support_initialized
= 0;
1617 /* Don't issue the warning unless it's really needed... */
1618 if (warning_needed
&& (context
!= inf_exited
))
1620 warning ("Exception catchpoints from last run were deleted.");
1621 warning ("You must reinsert them explicitly.");
1626 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1627 exists at PC. It returns ordinary_breakpoint_here if it's an
1628 ordinary breakpoint, or permanent_breakpoint_here if it's a
1629 permanent breakpoint.
1630 - When continuing from a location with an ordinary breakpoint, we
1631 actually single step once before calling insert_breakpoints.
1632 - When continuing from a localion with a permanent breakpoint, we
1633 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1634 the target, to advance the PC past the breakpoint. */
1636 enum breakpoint_here
1637 breakpoint_here_p (CORE_ADDR pc
)
1639 register struct breakpoint
*b
;
1640 int any_breakpoint_here
= 0;
1643 if ((b
->enable_state
== bp_enabled
1644 || b
->enable_state
== bp_permanent
)
1645 && b
->address
== pc
) /* bp is enabled and matches pc */
1647 if (overlay_debugging
1648 && section_is_overlay (b
->section
)
1649 && !section_is_mapped (b
->section
))
1650 continue; /* unmapped overlay -- can't be a match */
1651 else if (b
->enable_state
== bp_permanent
)
1652 return permanent_breakpoint_here
;
1654 any_breakpoint_here
= 1;
1657 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1661 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1662 but it only returns true if there is actually a breakpoint inserted
1666 breakpoint_inserted_here_p (CORE_ADDR pc
)
1668 register struct breakpoint
*b
;
1672 && b
->address
== pc
) /* bp is inserted and matches pc */
1674 if (overlay_debugging
1675 && section_is_overlay (b
->section
)
1676 && !section_is_mapped (b
->section
))
1677 continue; /* unmapped overlay -- can't be a match */
1685 /* Return nonzero if FRAME is a dummy frame. We can't use
1686 DEPRECATED_PC_IN_CALL_DUMMY because figuring out the saved SP would
1687 take too much time, at least using get_saved_register on the 68k.
1688 This means that for this function to work right a port must use the
1689 bp_call_dummy breakpoint. */
1692 deprecated_frame_in_dummy (struct frame_info
*frame
)
1694 struct breakpoint
*b
;
1699 /* This function is used by two files: get_frame_type(), after first
1700 checking that !DEPRECATED_USE_GENERIC_DUMMY_FRAMES; and
1701 sparc-tdep.c, which doesn't yet use generic dummy frames anyway. */
1702 gdb_assert (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES
);
1706 if (b
->type
== bp_call_dummy
1707 && frame_id_eq (b
->frame_id
, get_frame_id (frame
))
1708 /* We need to check the PC as well as the frame on the sparc,
1709 for signals.exp in the testsuite. */
1710 && (get_frame_pc (frame
)
1712 - SIZEOF_CALL_DUMMY_WORDS
/ sizeof (LONGEST
) * REGISTER_SIZE
))
1713 && get_frame_pc (frame
) <= b
->address
)
1719 /* breakpoint_thread_match (PC, PID) returns true if the breakpoint at
1720 PC is valid for process/thread PID. */
1723 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1725 struct breakpoint
*b
;
1728 thread
= pid_to_thread_id (ptid
);
1731 if (b
->enable_state
!= bp_disabled
1732 && b
->enable_state
!= bp_shlib_disabled
1733 && b
->enable_state
!= bp_call_disabled
1735 && (b
->thread
== -1 || b
->thread
== thread
))
1737 if (overlay_debugging
1738 && section_is_overlay (b
->section
)
1739 && !section_is_mapped (b
->section
))
1740 continue; /* unmapped overlay -- can't be a match */
1749 /* bpstat stuff. External routines' interfaces are documented
1753 ep_is_catchpoint (struct breakpoint
*ep
)
1756 (ep
->type
== bp_catch_load
)
1757 || (ep
->type
== bp_catch_unload
)
1758 || (ep
->type
== bp_catch_fork
)
1759 || (ep
->type
== bp_catch_vfork
)
1760 || (ep
->type
== bp_catch_exec
)
1761 || (ep
->type
== bp_catch_catch
)
1762 || (ep
->type
== bp_catch_throw
);
1764 /* ??rehrauer: Add more kinds here, as are implemented... */
1768 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1771 (ep
->type
== bp_catch_load
)
1772 || (ep
->type
== bp_catch_unload
);
1776 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1779 (ep
->type
== bp_catch_catch
)
1780 || (ep
->type
== bp_catch_throw
);
1783 /* Clear a bpstat so that it says we are not at any breakpoint.
1784 Also free any storage that is part of a bpstat. */
1787 bpstat_clear (bpstat
*bsp
)
1798 if (p
->old_val
!= NULL
)
1799 value_free (p
->old_val
);
1800 free_command_lines (&p
->commands
);
1807 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1808 is part of the bpstat is copied as well. */
1811 bpstat_copy (bpstat bs
)
1815 bpstat retval
= NULL
;
1820 for (; bs
!= NULL
; bs
= bs
->next
)
1822 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1823 memcpy (tmp
, bs
, sizeof (*tmp
));
1825 /* This is the first thing in the chain. */
1835 /* Find the bpstat associated with this breakpoint */
1838 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1843 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1845 if (bsp
->breakpoint_at
== breakpoint
)
1851 /* Find a step_resume breakpoint associated with this bpstat.
1852 (If there are multiple step_resume bp's on the list, this function
1853 will arbitrarily pick one.)
1855 It is an error to use this function if BPSTAT doesn't contain a
1856 step_resume breakpoint.
1858 See wait_for_inferior's use of this function. */
1860 bpstat_find_step_resume_breakpoint (bpstat bsp
)
1865 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1867 current_thread
= pid_to_thread_id (inferior_ptid
);
1869 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1871 if ((bsp
->breakpoint_at
!= NULL
) &&
1872 (bsp
->breakpoint_at
->type
== bp_step_resume
) &&
1873 (bsp
->breakpoint_at
->thread
== current_thread
||
1874 bsp
->breakpoint_at
->thread
== -1))
1875 return bsp
->breakpoint_at
;
1878 error ("Internal error (no step_resume breakpoint found)");
1882 /* Return the breakpoint number of the first breakpoint we are stopped
1883 at. *BSP upon return is a bpstat which points to the remaining
1884 breakpoints stopped at (but which is not guaranteed to be good for
1885 anything but further calls to bpstat_num).
1886 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1889 bpstat_num (bpstat
*bsp
)
1891 struct breakpoint
*b
;
1894 return 0; /* No more breakpoint values */
1897 b
= (*bsp
)->breakpoint_at
;
1898 *bsp
= (*bsp
)->next
;
1900 return -1; /* breakpoint that's been deleted since */
1902 return b
->number
; /* We have its number */
1906 /* Modify BS so that the actions will not be performed. */
1909 bpstat_clear_actions (bpstat bs
)
1911 for (; bs
!= NULL
; bs
= bs
->next
)
1913 free_command_lines (&bs
->commands
);
1914 if (bs
->old_val
!= NULL
)
1916 value_free (bs
->old_val
);
1922 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1925 cleanup_executing_breakpoints (PTR ignore
)
1927 executing_breakpoint_commands
= 0;
1930 /* Execute all the commands associated with all the breakpoints at this
1931 location. Any of these commands could cause the process to proceed
1932 beyond this point, etc. We look out for such changes by checking
1933 the global "breakpoint_proceeded" after each command. */
1936 bpstat_do_actions (bpstat
*bsp
)
1939 struct cleanup
*old_chain
;
1940 struct command_line
*cmd
;
1942 /* Avoid endless recursion if a `source' command is contained
1944 if (executing_breakpoint_commands
)
1947 executing_breakpoint_commands
= 1;
1948 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
1951 /* Note that (as of this writing), our callers all appear to
1952 be passing us the address of global stop_bpstat. And, if
1953 our calls to execute_control_command cause the inferior to
1954 proceed, that global (and hence, *bsp) will change.
1956 We must be careful to not touch *bsp unless the inferior
1957 has not proceeded. */
1959 /* This pointer will iterate over the list of bpstat's. */
1962 breakpoint_proceeded
= 0;
1963 for (; bs
!= NULL
; bs
= bs
->next
)
1968 execute_control_command (cmd
);
1970 if (breakpoint_proceeded
)
1975 if (breakpoint_proceeded
)
1976 /* The inferior is proceeded by the command; bomb out now.
1977 The bpstat chain has been blown away by wait_for_inferior.
1978 But since execution has stopped again, there is a new bpstat
1979 to look at, so start over. */
1982 free_command_lines (&bs
->commands
);
1984 do_cleanups (old_chain
);
1987 /* This is the normal print function for a bpstat. In the future,
1988 much of this logic could (should?) be moved to bpstat_stop_status,
1989 by having it set different print_it values.
1991 Current scheme: When we stop, bpstat_print() is called. It loops
1992 through the bpstat list of things causing this stop, calling the
1993 print_bp_stop_message function on each one. The behavior of the
1994 print_bp_stop_message function depends on the print_it field of
1995 bpstat. If such field so indicates, call this function here.
1997 Return values from this routine (ultimately used by bpstat_print()
1998 and normal_stop() to decide what to do):
1999 PRINT_NOTHING: Means we already printed all we needed to print,
2000 don't print anything else.
2001 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2002 that something to be followed by a location.
2003 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2004 that something to be followed by a location.
2005 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2008 static enum print_stop_action
2009 print_it_typical (bpstat bs
)
2011 struct cleanup
*old_chain
;
2012 struct ui_stream
*stb
;
2013 stb
= ui_out_stream_new (uiout
);
2014 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2015 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2016 which has since been deleted. */
2017 if (bs
->breakpoint_at
== NULL
)
2018 return PRINT_UNKNOWN
;
2020 switch (bs
->breakpoint_at
->type
)
2023 case bp_hardware_breakpoint
:
2024 annotate_breakpoint (bs
->breakpoint_at
->number
);
2025 ui_out_text (uiout
, "\nBreakpoint ");
2026 if (ui_out_is_mi_like_p (uiout
))
2027 ui_out_field_string (uiout
, "reason", "breakpoint-hit");
2028 ui_out_field_int (uiout
, "bkptno", bs
->breakpoint_at
->number
);
2029 ui_out_text (uiout
, ", ");
2030 return PRINT_SRC_AND_LOC
;
2033 case bp_shlib_event
:
2034 /* Did we stop because the user set the stop_on_solib_events
2035 variable? (If so, we report this as a generic, "Stopped due
2036 to shlib event" message.) */
2037 printf_filtered ("Stopped due to shared library event\n");
2038 return PRINT_NOTHING
;
2041 case bp_thread_event
:
2042 /* Not sure how we will get here.
2043 GDB should not stop for these breakpoints. */
2044 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
2045 return PRINT_NOTHING
;
2048 case bp_overlay_event
:
2049 /* By analogy with the thread event, GDB should not stop for these. */
2050 printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n");
2051 return PRINT_NOTHING
;
2055 annotate_catchpoint (bs
->breakpoint_at
->number
);
2056 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2057 printf_filtered ("loaded");
2058 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2059 return PRINT_SRC_AND_LOC
;
2062 case bp_catch_unload
:
2063 annotate_catchpoint (bs
->breakpoint_at
->number
);
2064 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2065 printf_filtered ("unloaded");
2066 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2067 return PRINT_SRC_AND_LOC
;
2071 annotate_catchpoint (bs
->breakpoint_at
->number
);
2072 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2073 printf_filtered ("forked");
2074 printf_filtered (" process %d), ",
2075 bs
->breakpoint_at
->forked_inferior_pid
);
2076 return PRINT_SRC_AND_LOC
;
2079 case bp_catch_vfork
:
2080 annotate_catchpoint (bs
->breakpoint_at
->number
);
2081 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2082 printf_filtered ("vforked");
2083 printf_filtered (" process %d), ",
2084 bs
->breakpoint_at
->forked_inferior_pid
);
2085 return PRINT_SRC_AND_LOC
;
2089 annotate_catchpoint (bs
->breakpoint_at
->number
);
2090 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
2091 bs
->breakpoint_at
->number
,
2092 bs
->breakpoint_at
->exec_pathname
);
2093 return PRINT_SRC_AND_LOC
;
2096 case bp_catch_catch
:
2097 if (current_exception_event
&&
2098 (CURRENT_EXCEPTION_KIND
== EX_EVENT_CATCH
))
2100 annotate_catchpoint (bs
->breakpoint_at
->number
);
2101 printf_filtered ("\nCatchpoint %d (exception caught), ",
2102 bs
->breakpoint_at
->number
);
2103 printf_filtered ("throw location ");
2104 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2105 printf_filtered ("%s:%d",
2106 CURRENT_EXCEPTION_THROW_FILE
,
2107 CURRENT_EXCEPTION_THROW_LINE
);
2109 printf_filtered ("unknown");
2111 printf_filtered (", catch location ");
2112 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2113 printf_filtered ("%s:%d",
2114 CURRENT_EXCEPTION_CATCH_FILE
,
2115 CURRENT_EXCEPTION_CATCH_LINE
);
2117 printf_filtered ("unknown");
2119 printf_filtered ("\n");
2120 /* don't bother to print location frame info */
2121 return PRINT_SRC_ONLY
;
2125 /* really throw, some other bpstat will handle it */
2126 return PRINT_UNKNOWN
;
2130 case bp_catch_throw
:
2131 if (current_exception_event
&&
2132 (CURRENT_EXCEPTION_KIND
== EX_EVENT_THROW
))
2134 annotate_catchpoint (bs
->breakpoint_at
->number
);
2135 printf_filtered ("\nCatchpoint %d (exception thrown), ",
2136 bs
->breakpoint_at
->number
);
2137 printf_filtered ("throw location ");
2138 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2139 printf_filtered ("%s:%d",
2140 CURRENT_EXCEPTION_THROW_FILE
,
2141 CURRENT_EXCEPTION_THROW_LINE
);
2143 printf_filtered ("unknown");
2145 printf_filtered (", catch location ");
2146 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2147 printf_filtered ("%s:%d",
2148 CURRENT_EXCEPTION_CATCH_FILE
,
2149 CURRENT_EXCEPTION_CATCH_LINE
);
2151 printf_filtered ("unknown");
2153 printf_filtered ("\n");
2154 /* don't bother to print location frame info */
2155 return PRINT_SRC_ONLY
;
2159 /* really catch, some other bpstat will handle it */
2160 return PRINT_UNKNOWN
;
2165 case bp_hardware_watchpoint
:
2166 if (bs
->old_val
!= NULL
)
2168 annotate_watchpoint (bs
->breakpoint_at
->number
);
2169 if (ui_out_is_mi_like_p (uiout
))
2170 ui_out_field_string (uiout
, "reason", "watchpoint-trigger");
2171 mention (bs
->breakpoint_at
);
2172 ui_out_tuple_begin (uiout
, "value");
2173 ui_out_text (uiout
, "\nOld value = ");
2174 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2175 ui_out_field_stream (uiout
, "old", stb
);
2176 ui_out_text (uiout
, "\nNew value = ");
2177 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2178 ui_out_field_stream (uiout
, "new", stb
);
2179 ui_out_tuple_end (uiout
);
2180 ui_out_text (uiout
, "\n");
2181 value_free (bs
->old_val
);
2184 /* More than one watchpoint may have been triggered. */
2185 return PRINT_UNKNOWN
;
2188 case bp_read_watchpoint
:
2189 if (ui_out_is_mi_like_p (uiout
))
2190 ui_out_field_string (uiout
, "reason", "read-watchpoint-trigger");
2191 mention (bs
->breakpoint_at
);
2192 ui_out_tuple_begin (uiout
, "value");
2193 ui_out_text (uiout
, "\nValue = ");
2194 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2195 ui_out_field_stream (uiout
, "value", stb
);
2196 ui_out_tuple_end (uiout
);
2197 ui_out_text (uiout
, "\n");
2198 return PRINT_UNKNOWN
;
2201 case bp_access_watchpoint
:
2202 if (bs
->old_val
!= NULL
)
2204 annotate_watchpoint (bs
->breakpoint_at
->number
);
2205 if (ui_out_is_mi_like_p (uiout
))
2206 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2207 mention (bs
->breakpoint_at
);
2208 ui_out_tuple_begin (uiout
, "value");
2209 ui_out_text (uiout
, "\nOld value = ");
2210 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2211 ui_out_field_stream (uiout
, "old", stb
);
2212 value_free (bs
->old_val
);
2214 ui_out_text (uiout
, "\nNew value = ");
2218 mention (bs
->breakpoint_at
);
2219 if (ui_out_is_mi_like_p (uiout
))
2220 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2221 ui_out_tuple_begin (uiout
, "value");
2222 ui_out_text (uiout
, "\nValue = ");
2224 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0,Val_pretty_default
);
2225 ui_out_field_stream (uiout
, "new", stb
);
2226 ui_out_tuple_end (uiout
);
2227 ui_out_text (uiout
, "\n");
2228 return PRINT_UNKNOWN
;
2231 /* Fall through, we don't deal with these types of breakpoints
2235 if (ui_out_is_mi_like_p (uiout
))
2236 ui_out_field_string (uiout
, "reason", "function-finished");
2237 return PRINT_UNKNOWN
;
2241 if (ui_out_is_mi_like_p (uiout
))
2242 ui_out_field_string (uiout
, "reason", "location-reached");
2243 return PRINT_UNKNOWN
;
2248 case bp_longjmp_resume
:
2249 case bp_step_resume
:
2250 case bp_through_sigtramp
:
2251 case bp_watchpoint_scope
:
2254 return PRINT_UNKNOWN
;
2258 /* Generic routine for printing messages indicating why we
2259 stopped. The behavior of this function depends on the value
2260 'print_it' in the bpstat structure. Under some circumstances we
2261 may decide not to print anything here and delegate the task to
2264 static enum print_stop_action
2265 print_bp_stop_message (bpstat bs
)
2267 switch (bs
->print_it
)
2270 /* Nothing should be printed for this bpstat entry. */
2271 return PRINT_UNKNOWN
;
2275 /* We still want to print the frame, but we already printed the
2276 relevant messages. */
2277 return PRINT_SRC_AND_LOC
;
2280 case print_it_normal
:
2281 /* Normal case, we handle everything in print_it_typical. */
2282 return print_it_typical (bs
);
2285 internal_error (__FILE__
, __LINE__
,
2286 "print_bp_stop_message: unrecognized enum value");
2291 /* Print a message indicating what happened. This is called from
2292 normal_stop(). The input to this routine is the head of the bpstat
2293 list - a list of the eventpoints that caused this stop. This
2294 routine calls the generic print routine for printing a message
2295 about reasons for stopping. This will print (for example) the
2296 "Breakpoint n," part of the output. The return value of this
2299 PRINT_UNKNOWN: Means we printed nothing
2300 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2301 code to print the location. An example is
2302 "Breakpoint 1, " which should be followed by
2304 PRINT_SRC_ONLY: Means we printed something, but there is no need
2305 to also print the location part of the message.
2306 An example is the catch/throw messages, which
2307 don't require a location appended to the end.
2308 PRINT_NOTHING: We have done some printing and we don't need any
2309 further info to be printed.*/
2311 enum print_stop_action
2312 bpstat_print (bpstat bs
)
2316 /* Maybe another breakpoint in the chain caused us to stop.
2317 (Currently all watchpoints go on the bpstat whether hit or not.
2318 That probably could (should) be changed, provided care is taken
2319 with respect to bpstat_explains_signal). */
2320 for (; bs
; bs
= bs
->next
)
2322 val
= print_bp_stop_message (bs
);
2323 if (val
== PRINT_SRC_ONLY
2324 || val
== PRINT_SRC_AND_LOC
2325 || val
== PRINT_NOTHING
)
2329 /* We reached the end of the chain, or we got a null BS to start
2330 with and nothing was printed. */
2331 return PRINT_UNKNOWN
;
2334 /* Evaluate the expression EXP and return 1 if value is zero.
2335 This is used inside a catch_errors to evaluate the breakpoint condition.
2336 The argument is a "struct expression *" that has been cast to char * to
2337 make it pass through catch_errors. */
2340 breakpoint_cond_eval (PTR exp
)
2342 struct value
*mark
= value_mark ();
2343 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2344 value_free_to_mark (mark
);
2348 /* Allocate a new bpstat and chain it to the current one. */
2351 bpstat_alloc (struct breakpoint
*b
, bpstat cbs
/* Current "bs" value */ )
2355 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2357 bs
->breakpoint_at
= b
;
2358 /* If the condition is false, etc., don't do the commands. */
2359 bs
->commands
= NULL
;
2361 bs
->print_it
= print_it_normal
;
2365 /* Possible return values for watchpoint_check (this can't be an enum
2366 because of check_errors). */
2367 /* The watchpoint has been deleted. */
2368 #define WP_DELETED 1
2369 /* The value has changed. */
2370 #define WP_VALUE_CHANGED 2
2371 /* The value has not changed. */
2372 #define WP_VALUE_NOT_CHANGED 3
2374 #define BP_TEMPFLAG 1
2375 #define BP_HARDWAREFLAG 2
2377 /* Check watchpoint condition. */
2380 watchpoint_check (PTR p
)
2382 bpstat bs
= (bpstat
) p
;
2383 struct breakpoint
*b
;
2384 struct frame_info
*fr
;
2385 int within_current_scope
;
2387 b
= bs
->breakpoint_at
;
2389 if (b
->exp_valid_block
== NULL
)
2390 within_current_scope
= 1;
2393 /* There is no current frame at this moment. If we're going to have
2394 any chance of handling watchpoints on local variables, we'll need
2395 the frame chain (so we can determine if we're in scope). */
2396 reinit_frame_cache ();
2397 fr
= frame_find_by_id (b
->watchpoint_frame
);
2398 within_current_scope
= (fr
!= NULL
);
2399 /* in_function_epilogue_p() returns a non-zero value if we're still
2400 in the function but the stack frame has already been invalidated.
2401 Since we can't rely on the values of local variables after the
2402 stack has been destroyed, we are treating the watchpoint in that
2403 state as `not changed' without further checking. */
2404 if (within_current_scope
&& fr
== get_current_frame ()
2405 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2406 return WP_VALUE_NOT_CHANGED
;
2407 if (within_current_scope
)
2408 /* If we end up stopping, the current frame will get selected
2409 in normal_stop. So this call to select_frame won't affect
2414 if (within_current_scope
)
2416 /* We use value_{,free_to_}mark because it could be a
2417 *long* time before we return to the command level and
2418 call free_all_values. We can't call free_all_values because
2419 we might be in the middle of evaluating a function call. */
2421 struct value
*mark
= value_mark ();
2422 struct value
*new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
2423 if (!value_equal (b
->val
, new_val
))
2425 release_value (new_val
);
2426 value_free_to_mark (mark
);
2427 bs
->old_val
= b
->val
;
2429 /* We will stop here */
2430 return WP_VALUE_CHANGED
;
2434 /* Nothing changed, don't do anything. */
2435 value_free_to_mark (mark
);
2436 /* We won't stop here */
2437 return WP_VALUE_NOT_CHANGED
;
2442 /* This seems like the only logical thing to do because
2443 if we temporarily ignored the watchpoint, then when
2444 we reenter the block in which it is valid it contains
2445 garbage (in the case of a function, it may have two
2446 garbage values, one before and one after the prologue).
2447 So we can't even detect the first assignment to it and
2448 watch after that (since the garbage may or may not equal
2449 the first value assigned). */
2450 /* We print all the stop information in print_it_typical(), but
2451 in this case, by the time we call print_it_typical() this bp
2452 will be deleted already. So we have no choice but print the
2453 information here. */
2454 if (ui_out_is_mi_like_p (uiout
))
2455 ui_out_field_string (uiout
, "reason", "watchpoint-scope");
2456 ui_out_text (uiout
, "\nWatchpoint ");
2457 ui_out_field_int (uiout
, "wpnum", bs
->breakpoint_at
->number
);
2458 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2459 which its expression is valid.\n");
2461 if (b
->related_breakpoint
)
2462 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2463 b
->disposition
= disp_del_at_next_stop
;
2469 /* Get a bpstat associated with having just stopped at address *PC
2470 and frame address CORE_ADDRESS. Update *PC to point at the
2471 breakpoint (if we hit a breakpoint). NOT_A_SW_BREAKPOINT is nonzero
2472 if this is known to not be a real breakpoint (it could still be a
2473 watchpoint, though). */
2475 /* Determine whether we stopped at a breakpoint, etc, or whether we
2476 don't understand this stop. Result is a chain of bpstat's such that:
2478 if we don't understand the stop, the result is a null pointer.
2480 if we understand why we stopped, the result is not null.
2482 Each element of the chain refers to a particular breakpoint or
2483 watchpoint at which we have stopped. (We may have stopped for
2484 several reasons concurrently.)
2486 Each element of the chain has valid next, breakpoint_at,
2487 commands, FIXME??? fields. */
2490 bpstat_stop_status (CORE_ADDR
*pc
, int not_a_sw_breakpoint
)
2492 register struct breakpoint
*b
, *temp
;
2494 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2495 int real_breakpoint
= 0;
2496 /* Root of the chain of bpstat's */
2497 struct bpstats root_bs
[1];
2498 /* Pointer to the last thing in the chain currently. */
2499 bpstat bs
= root_bs
;
2500 static char message1
[] =
2501 "Error evaluating expression for watchpoint %d\n";
2502 char message
[sizeof (message1
) + 30 /* slop */ ];
2504 /* Get the address where the breakpoint would have been. The
2505 "not_a_sw_breakpoint" argument is meant to distinguish between a
2506 breakpoint trap event and a trace/singlestep trap event. For a
2507 trace/singlestep trap event, we would not want to subtract
2508 DECR_PC_AFTER_BREAK from the PC. */
2510 bp_addr
= *pc
- (not_a_sw_breakpoint
? 0 : DECR_PC_AFTER_BREAK
);
2512 ALL_BREAKPOINTS_SAFE (b
, temp
)
2514 if (b
->enable_state
== bp_disabled
2515 || b
->enable_state
== bp_shlib_disabled
2516 || b
->enable_state
== bp_call_disabled
)
2519 if (b
->type
!= bp_watchpoint
2520 && b
->type
!= bp_hardware_watchpoint
2521 && b
->type
!= bp_read_watchpoint
2522 && b
->type
!= bp_access_watchpoint
2523 && b
->type
!= bp_hardware_breakpoint
2524 && b
->type
!= bp_catch_fork
2525 && b
->type
!= bp_catch_vfork
2526 && b
->type
!= bp_catch_exec
2527 && b
->type
!= bp_catch_catch
2528 && b
->type
!= bp_catch_throw
) /* a non-watchpoint bp */
2530 if (b
->address
!= bp_addr
) /* address doesn't match */
2532 if (overlay_debugging
/* unmapped overlay section */
2533 && section_is_overlay (b
->section
)
2534 && !section_is_mapped (b
->section
))
2538 if (b
->type
== bp_hardware_breakpoint
)
2540 if (b
->address
!= (*pc
- DECR_PC_AFTER_HW_BREAK
))
2542 if (overlay_debugging
/* unmapped overlay section */
2543 && section_is_overlay (b
->section
)
2544 && !section_is_mapped (b
->section
))
2548 /* Is this a catchpoint of a load or unload? If so, did we
2549 get a load or unload of the specified library? If not,
2551 if ((b
->type
== bp_catch_load
)
2552 #if defined(SOLIB_HAVE_LOAD_EVENT)
2553 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2554 || ((b
->dll_pathname
!= NULL
)
2555 && (strcmp (b
->dll_pathname
,
2556 SOLIB_LOADED_LIBRARY_PATHNAME (
2557 PIDGET (inferior_ptid
)))
2563 if ((b
->type
== bp_catch_unload
)
2564 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2565 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2566 || ((b
->dll_pathname
!= NULL
)
2567 && (strcmp (b
->dll_pathname
,
2568 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2569 PIDGET (inferior_ptid
)))
2575 if ((b
->type
== bp_catch_fork
)
2576 && !inferior_has_forked (PIDGET (inferior_ptid
),
2577 &b
->forked_inferior_pid
))
2580 if ((b
->type
== bp_catch_vfork
)
2581 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2582 &b
->forked_inferior_pid
))
2585 if ((b
->type
== bp_catch_exec
)
2586 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2589 if (ep_is_exception_catchpoint (b
) &&
2590 !(current_exception_event
= target_get_current_exception_event ()))
2593 /* Come here if it's a watchpoint, or if the break address matches */
2595 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
2597 /* Watchpoints may change this, if not found to have triggered. */
2601 sprintf (message
, message1
, b
->number
);
2602 if (b
->type
== bp_watchpoint
||
2603 b
->type
== bp_hardware_watchpoint
)
2605 switch (catch_errors (watchpoint_check
, bs
, message
,
2609 /* We've already printed what needs to be printed. */
2610 /* Actually this is superfluous, because by the time we
2611 call print_it_typical() the wp will be already deleted,
2612 and the function will return immediately. */
2613 bs
->print_it
= print_it_done
;
2616 case WP_VALUE_CHANGED
:
2620 case WP_VALUE_NOT_CHANGED
:
2622 bs
->print_it
= print_it_noop
;
2629 /* Error from catch_errors. */
2630 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2631 if (b
->related_breakpoint
)
2632 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2633 b
->disposition
= disp_del_at_next_stop
;
2634 /* We've already printed what needs to be printed. */
2635 bs
->print_it
= print_it_done
;
2641 else if (b
->type
== bp_read_watchpoint
||
2642 b
->type
== bp_access_watchpoint
)
2648 addr
= target_stopped_data_address ();
2651 for (v
= b
->val_chain
; v
; v
= v
->next
)
2653 if (VALUE_LVAL (v
) == lval_memory
2654 && ! VALUE_LAZY (v
))
2656 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
2658 if (v
== b
->val_chain
2659 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
2660 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
2664 vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
2665 /* Exact match not required. Within range is
2667 if (addr
>= vaddr
&&
2668 addr
< vaddr
+ TYPE_LENGTH (VALUE_TYPE (v
)))
2674 switch (catch_errors (watchpoint_check
, bs
, message
,
2678 /* We've already printed what needs to be printed. */
2679 bs
->print_it
= print_it_done
;
2682 case WP_VALUE_CHANGED
:
2683 if (b
->type
== bp_read_watchpoint
)
2685 /* Don't stop: read watchpoints shouldn't fire if
2686 the value has changed. This is for targets which
2687 cannot set read-only watchpoints. */
2688 bs
->print_it
= print_it_noop
;
2694 case WP_VALUE_NOT_CHANGED
:
2701 /* Error from catch_errors. */
2702 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2703 if (b
->related_breakpoint
)
2704 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2705 b
->disposition
= disp_del_at_next_stop
;
2706 /* We've already printed what needs to be printed. */
2707 bs
->print_it
= print_it_done
;
2710 else /* found == 0 */
2712 /* This is a case where some watchpoint(s) triggered,
2713 but not at the address of this watchpoint (FOUND
2714 was left zero). So don't print anything for this
2716 bs
->print_it
= print_it_noop
;
2723 /* By definition, an encountered breakpoint is a triggered
2727 real_breakpoint
= 1;
2730 if (frame_id_p (b
->frame_id
)
2731 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2735 int value_is_zero
= 0;
2739 /* Need to select the frame, with all that implies
2740 so that the conditions will have the right context. */
2741 select_frame (get_current_frame ());
2743 = catch_errors (breakpoint_cond_eval
, (b
->cond
),
2744 "Error in testing breakpoint condition:\n",
2746 /* FIXME-someday, should give breakpoint # */
2749 if (b
->cond
&& value_is_zero
)
2752 /* Don't consider this a hit. */
2755 else if (b
->ignore_count
> 0)
2758 annotate_ignore_count_change ();
2763 /* We will stop here */
2764 if (b
->disposition
== disp_disable
)
2765 b
->enable_state
= bp_disabled
;
2766 bs
->commands
= copy_command_lines (b
->commands
);
2770 (STREQ ("silent", bs
->commands
->line
) ||
2771 (xdb_commands
&& STREQ ("Q", bs
->commands
->line
))))
2773 bs
->commands
= bs
->commands
->next
;
2778 /* Print nothing for this entry if we dont stop or if we dont print. */
2779 if (bs
->stop
== 0 || bs
->print
== 0)
2780 bs
->print_it
= print_it_noop
;
2783 bs
->next
= NULL
; /* Terminate the chain */
2784 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2786 if (real_breakpoint
&& bs
)
2788 if (bs
->breakpoint_at
->type
== bp_hardware_breakpoint
)
2790 if (DECR_PC_AFTER_HW_BREAK
!= 0)
2792 *pc
= *pc
- DECR_PC_AFTER_HW_BREAK
;
2798 if (DECR_PC_AFTER_BREAK
!= 0 || must_shift_inst_regs
)
2801 #if defined (SHIFT_INST_REGS)
2803 #else /* No SHIFT_INST_REGS. */
2805 #endif /* No SHIFT_INST_REGS. */
2810 /* The value of a hardware watchpoint hasn't changed, but the
2811 intermediate memory locations we are watching may have. */
2812 if (bs
&& !bs
->stop
&&
2813 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2814 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2815 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2817 remove_breakpoints ();
2818 insert_breakpoints ();
2823 /* Tell what to do about this bpstat. */
2825 bpstat_what (bpstat bs
)
2827 /* Classify each bpstat as one of the following. */
2830 /* This bpstat element has no effect on the main_action. */
2833 /* There was a watchpoint, stop but don't print. */
2836 /* There was a watchpoint, stop and print. */
2839 /* There was a breakpoint but we're not stopping. */
2842 /* There was a breakpoint, stop but don't print. */
2845 /* There was a breakpoint, stop and print. */
2848 /* We hit the longjmp breakpoint. */
2851 /* We hit the longjmp_resume breakpoint. */
2854 /* We hit the step_resume breakpoint. */
2857 /* We hit the through_sigtramp breakpoint. */
2860 /* We hit the shared library event breakpoint. */
2863 /* We caught a shared library event. */
2866 /* This is just used to count how many enums there are. */
2870 /* Here is the table which drives this routine. So that we can
2871 format it pretty, we define some abbreviations for the
2872 enum bpstat_what codes. */
2873 #define kc BPSTAT_WHAT_KEEP_CHECKING
2874 #define ss BPSTAT_WHAT_STOP_SILENT
2875 #define sn BPSTAT_WHAT_STOP_NOISY
2876 #define sgl BPSTAT_WHAT_SINGLE
2877 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2878 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2879 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2880 #define sr BPSTAT_WHAT_STEP_RESUME
2881 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2882 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2883 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2885 /* "Can't happen." Might want to print an error message.
2886 abort() is not out of the question, but chances are GDB is just
2887 a bit confused, not unusable. */
2888 #define err BPSTAT_WHAT_STOP_NOISY
2890 /* Given an old action and a class, come up with a new action. */
2891 /* One interesting property of this table is that wp_silent is the same
2892 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2893 after stopping, the check for whether to step over a breakpoint
2894 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2895 reference to how we stopped. We retain separate wp_silent and
2896 bp_silent codes in case we want to change that someday.
2898 Another possibly interesting property of this table is that
2899 there's a partial ordering, priority-like, of the actions. Once
2900 you've decided that some action is appropriate, you'll never go
2901 back and decide something of a lower priority is better. The
2904 kc < clr sgl shl shlr slr sn sr ss ts
2905 sgl < clrs shl shlr slr sn sr ss ts
2906 slr < err shl shlr sn sr ss ts
2907 clr < clrs err shl shlr sn sr ss ts
2908 clrs < err shl shlr sn sr ss ts
2909 ss < shl shlr sn sr ts
2916 What I think this means is that we don't need a damned table
2917 here. If you just put the rows and columns in the right order,
2918 it'd look awfully regular. We could simply walk the bpstat list
2919 and choose the highest priority action we find, with a little
2920 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
2921 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
2922 is messy anyway). */
2924 /* step_resume entries: a step resume breakpoint overrides another
2925 breakpoint of signal handling (see comment in wait_for_inferior
2926 at first PC_IN_SIGTRAMP where we set the step_resume breakpoint). */
2927 /* We handle the through_sigtramp_breakpoint the same way; having both
2928 one of those and a step_resume_breakpoint is probably very rare (?). */
2930 static const enum bpstat_what_main_action
2931 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
2934 /* kc ss sn sgl slr clr clrs sr ts shl shlr
2937 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, ts
, shl
, shlr
},
2939 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
2941 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
2943 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, ts
, shl
, shlr
},
2945 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
2947 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
2949 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, ts
, shl
, shlr
},
2951 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, ts
, shl
, shlr
},
2953 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, ts
, shl
, shlr
},
2955 {ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, shl
, shlr
},
2957 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, shl
, ts
, shl
, shlr
},
2959 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, ts
, shlr
, shlr
}
2974 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
2975 struct bpstat_what retval
;
2977 retval
.call_dummy
= 0;
2978 for (; bs
!= NULL
; bs
= bs
->next
)
2980 enum class bs_class
= no_effect
;
2981 if (bs
->breakpoint_at
== NULL
)
2982 /* I suspect this can happen if it was a momentary breakpoint
2983 which has since been deleted. */
2985 switch (bs
->breakpoint_at
->type
)
2991 case bp_hardware_breakpoint
:
2997 bs_class
= bp_noisy
;
2999 bs_class
= bp_silent
;
3002 bs_class
= bp_nostop
;
3005 case bp_hardware_watchpoint
:
3006 case bp_read_watchpoint
:
3007 case bp_access_watchpoint
:
3011 bs_class
= wp_noisy
;
3013 bs_class
= wp_silent
;
3016 /* There was a watchpoint, but we're not stopping.
3017 This requires no further action. */
3018 bs_class
= no_effect
;
3021 bs_class
= long_jump
;
3023 case bp_longjmp_resume
:
3024 bs_class
= long_resume
;
3026 case bp_step_resume
:
3029 bs_class
= step_resume
;
3032 /* It is for the wrong frame. */
3033 bs_class
= bp_nostop
;
3035 case bp_through_sigtramp
:
3036 bs_class
= through_sig
;
3038 case bp_watchpoint_scope
:
3039 bs_class
= bp_nostop
;
3041 case bp_shlib_event
:
3042 bs_class
= shlib_event
;
3044 case bp_thread_event
:
3045 case bp_overlay_event
:
3046 bs_class
= bp_nostop
;
3049 case bp_catch_unload
:
3050 /* Only if this catchpoint triggered should we cause the
3051 step-out-of-dld behaviour. Otherwise, we ignore this
3054 bs_class
= catch_shlib_event
;
3056 bs_class
= no_effect
;
3059 case bp_catch_vfork
:
3064 bs_class
= bp_noisy
;
3066 bs_class
= bp_silent
;
3069 /* There was a catchpoint, but we're not stopping.
3070 This requires no further action. */
3071 bs_class
= no_effect
;
3073 case bp_catch_catch
:
3074 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
3075 bs_class
= bp_nostop
;
3077 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3079 case bp_catch_throw
:
3080 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
3081 bs_class
= bp_nostop
;
3083 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3086 /* Make sure the action is stop (silent or noisy),
3087 so infrun.c pops the dummy frame. */
3088 bs_class
= bp_silent
;
3089 retval
.call_dummy
= 1;
3092 current_action
= table
[(int) bs_class
][(int) current_action
];
3094 retval
.main_action
= current_action
;
3098 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3099 without hardware support). This isn't related to a specific bpstat,
3100 just to things like whether watchpoints are set. */
3103 bpstat_should_step (void)
3105 struct breakpoint
*b
;
3107 if (b
->enable_state
== bp_enabled
&& b
->type
== bp_watchpoint
)
3112 /* Nonzero if there are enabled hardware watchpoints. */
3114 bpstat_have_active_hw_watchpoints (void)
3116 struct breakpoint
*b
;
3118 if ((b
->enable_state
== bp_enabled
) &&
3120 ((b
->type
== bp_hardware_watchpoint
) ||
3121 (b
->type
== bp_read_watchpoint
) ||
3122 (b
->type
== bp_access_watchpoint
)))
3128 /* Given a bpstat that records zero or more triggered eventpoints, this
3129 function returns another bpstat which contains only the catchpoints
3130 on that first list, if any. */
3132 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3134 struct bpstats root_bs
[1];
3135 bpstat bs
= root_bs
;
3136 struct breakpoint
*ep
;
3139 bpstat_clear (cp_list
);
3140 root_bs
->next
= NULL
;
3142 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3144 /* Is this eventpoint a catchpoint? If not, ignore it. */
3145 ep
= ep_list
->breakpoint_at
;
3148 if ((ep
->type
!= bp_catch_load
) &&
3149 (ep
->type
!= bp_catch_unload
) &&
3150 (ep
->type
!= bp_catch_catch
) &&
3151 (ep
->type
!= bp_catch_throw
))
3152 /* pai: (temp) ADD fork/vfork here!! */
3155 /* Yes; add it to the list. */
3156 bs
= bpstat_alloc (ep
, bs
);
3161 #if defined(SOLIB_ADD)
3162 /* Also, for each triggered catchpoint, tag it with the name of
3163 the library that caused this trigger. (We copy the name now,
3164 because it's only guaranteed to be available NOW, when the
3165 catchpoint triggers. Clients who may wish to know the name
3166 later must get it from the catchpoint itself.) */
3167 if (ep
->triggered_dll_pathname
!= NULL
)
3168 xfree (ep
->triggered_dll_pathname
);
3169 if (ep
->type
== bp_catch_load
)
3170 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3171 PIDGET (inferior_ptid
));
3173 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3174 PIDGET (inferior_ptid
));
3176 dll_pathname
= NULL
;
3180 ep
->triggered_dll_pathname
= (char *)
3181 xmalloc (strlen (dll_pathname
) + 1);
3182 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3185 ep
->triggered_dll_pathname
= NULL
;
3191 /* Print B to gdb_stdout. */
3193 print_one_breakpoint (struct breakpoint
*b
,
3194 CORE_ADDR
*last_addr
)
3196 register struct command_line
*l
;
3197 register struct symbol
*sym
;
3198 struct ep_type_description
3203 static struct ep_type_description bptypes
[] =
3205 {bp_none
, "?deleted?"},
3206 {bp_breakpoint
, "breakpoint"},
3207 {bp_hardware_breakpoint
, "hw breakpoint"},
3208 {bp_until
, "until"},
3209 {bp_finish
, "finish"},
3210 {bp_watchpoint
, "watchpoint"},
3211 {bp_hardware_watchpoint
, "hw watchpoint"},
3212 {bp_read_watchpoint
, "read watchpoint"},
3213 {bp_access_watchpoint
, "acc watchpoint"},
3214 {bp_longjmp
, "longjmp"},
3215 {bp_longjmp_resume
, "longjmp resume"},
3216 {bp_step_resume
, "step resume"},
3217 {bp_through_sigtramp
, "sigtramp"},
3218 {bp_watchpoint_scope
, "watchpoint scope"},
3219 {bp_call_dummy
, "call dummy"},
3220 {bp_shlib_event
, "shlib events"},
3221 {bp_thread_event
, "thread events"},
3222 {bp_overlay_event
, "overlay events"},
3223 {bp_catch_load
, "catch load"},
3224 {bp_catch_unload
, "catch unload"},
3225 {bp_catch_fork
, "catch fork"},
3226 {bp_catch_vfork
, "catch vfork"},
3227 {bp_catch_exec
, "catch exec"},
3228 {bp_catch_catch
, "catch catch"},
3229 {bp_catch_throw
, "catch throw"}
3232 static char *bpdisps
[] =
3233 {"del", "dstp", "dis", "keep"};
3234 static char bpenables
[] = "nynny";
3235 char wrap_indent
[80];
3236 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3237 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3240 ui_out_tuple_begin (uiout
, "bkpt");
3244 ui_out_field_int (uiout
, "number", b
->number
);
3248 if (((int) b
->type
> (sizeof (bptypes
) / sizeof (bptypes
[0])))
3249 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3250 internal_error (__FILE__
, __LINE__
,
3251 "bptypes table does not describe type #%d.",
3253 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3257 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3261 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3262 ui_out_spaces (uiout
, 2);
3265 strcpy (wrap_indent
, " ");
3268 if (TARGET_ADDR_BIT
<= 32)
3269 strcat (wrap_indent
, " ");
3271 strcat (wrap_indent
, " ");
3276 internal_error (__FILE__
, __LINE__
,
3277 "print_one_breakpoint: bp_none encountered\n");
3281 case bp_hardware_watchpoint
:
3282 case bp_read_watchpoint
:
3283 case bp_access_watchpoint
:
3284 /* Field 4, the address, is omitted (which makes the columns
3285 not line up too nicely with the headers, but the effect
3286 is relatively readable). */
3288 ui_out_field_skip (uiout
, "addr");
3290 print_expression (b
->exp
, stb
->stream
);
3291 ui_out_field_stream (uiout
, "what", stb
);
3295 case bp_catch_unload
:
3296 /* Field 4, the address, is omitted (which makes the columns
3297 not line up too nicely with the headers, but the effect
3298 is relatively readable). */
3300 ui_out_field_skip (uiout
, "addr");
3302 if (b
->dll_pathname
== NULL
)
3304 ui_out_field_string (uiout
, "what", "<any library>");
3305 ui_out_spaces (uiout
, 1);
3309 ui_out_text (uiout
, "library \"");
3310 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3311 ui_out_text (uiout
, "\" ");
3316 case bp_catch_vfork
:
3317 /* Field 4, the address, is omitted (which makes the columns
3318 not line up too nicely with the headers, but the effect
3319 is relatively readable). */
3321 ui_out_field_skip (uiout
, "addr");
3323 if (b
->forked_inferior_pid
!= 0)
3325 ui_out_text (uiout
, "process ");
3326 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3327 ui_out_spaces (uiout
, 1);
3331 /* Field 4, the address, is omitted (which makes the columns
3332 not line up too nicely with the headers, but the effect
3333 is relatively readable). */
3335 ui_out_field_skip (uiout
, "addr");
3337 if (b
->exec_pathname
!= NULL
)
3339 ui_out_text (uiout
, "program \"");
3340 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3341 ui_out_text (uiout
, "\" ");
3345 case bp_catch_catch
:
3346 /* Field 4, the address, is omitted (which makes the columns
3347 not line up too nicely with the headers, but the effect
3348 is relatively readable). */
3350 ui_out_field_skip (uiout
, "addr");
3352 ui_out_field_string (uiout
, "what", "exception catch");
3353 ui_out_spaces (uiout
, 1);
3356 case bp_catch_throw
:
3357 /* Field 4, the address, is omitted (which makes the columns
3358 not line up too nicely with the headers, but the effect
3359 is relatively readable). */
3361 ui_out_field_skip (uiout
, "addr");
3363 ui_out_field_string (uiout
, "what", "exception throw");
3364 ui_out_spaces (uiout
, 1);
3368 case bp_hardware_breakpoint
:
3372 case bp_longjmp_resume
:
3373 case bp_step_resume
:
3374 case bp_through_sigtramp
:
3375 case bp_watchpoint_scope
:
3377 case bp_shlib_event
:
3378 case bp_thread_event
:
3379 case bp_overlay_event
:
3383 ui_out_field_core_addr (uiout
, "addr", b
->address
);
3386 *last_addr
= b
->address
;
3389 sym
= find_pc_sect_function (b
->address
, b
->section
);
3392 ui_out_text (uiout
, "in ");
3393 ui_out_field_string (uiout
, "func",
3394 SYMBOL_SOURCE_NAME (sym
));
3395 ui_out_wrap_hint (uiout
, wrap_indent
);
3396 ui_out_text (uiout
, " at ");
3398 ui_out_field_string (uiout
, "file", b
->source_file
);
3399 ui_out_text (uiout
, ":");
3400 ui_out_field_int (uiout
, "line", b
->line_number
);
3404 print_address_symbolic (b
->address
, stb
->stream
, demangle
, "");
3405 ui_out_field_stream (uiout
, "at", stb
);
3410 if (b
->thread
!= -1)
3412 /* FIXME: This seems to be redundant and lost here; see the
3413 "stop only in" line a little further down. */
3414 ui_out_text (uiout
, " thread ");
3415 ui_out_field_int (uiout
, "thread", b
->thread
);
3418 ui_out_text (uiout
, "\n");
3420 if (frame_id_p (b
->frame_id
))
3423 ui_out_text (uiout
, "\tstop only in stack frame at ");
3424 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3426 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.base
);
3427 ui_out_text (uiout
, "\n");
3433 ui_out_text (uiout
, "\tstop only if ");
3434 print_expression (b
->cond
, stb
->stream
);
3435 ui_out_field_stream (uiout
, "cond", stb
);
3436 ui_out_text (uiout
, "\n");
3439 if (b
->thread
!= -1)
3441 /* FIXME should make an annotation for this */
3442 ui_out_text (uiout
, "\tstop only in thread ");
3443 ui_out_field_int (uiout
, "thread", b
->thread
);
3444 ui_out_text (uiout
, "\n");
3447 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3449 /* FIXME should make an annotation for this */
3450 if (ep_is_catchpoint (b
))
3451 ui_out_text (uiout
, "\tcatchpoint");
3453 ui_out_text (uiout
, "\tbreakpoint");
3454 ui_out_text (uiout
, " already hit ");
3455 ui_out_field_int (uiout
, "times", b
->hit_count
);
3456 if (b
->hit_count
== 1)
3457 ui_out_text (uiout
, " time\n");
3459 ui_out_text (uiout
, " times\n");
3462 /* Output the count also if it is zero, but only if this is
3463 mi. FIXME: Should have a better test for this. */
3464 if (ui_out_is_mi_like_p (uiout
))
3465 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3466 ui_out_field_int (uiout
, "times", b
->hit_count
);
3468 if (b
->ignore_count
)
3471 ui_out_text (uiout
, "\tignore next ");
3472 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3473 ui_out_text (uiout
, " hits\n");
3476 if ((l
= b
->commands
))
3479 ui_out_tuple_begin (uiout
, "script");
3480 print_command_lines (uiout
, l
, 4);
3481 ui_out_tuple_end (uiout
);
3483 ui_out_tuple_end (uiout
);
3484 do_cleanups (old_chain
);
3487 struct captured_breakpoint_query_args
3493 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3495 struct captured_breakpoint_query_args
*args
= data
;
3496 register struct breakpoint
*b
;
3497 CORE_ADDR dummy_addr
= 0;
3500 if (args
->bnum
== b
->number
)
3502 print_one_breakpoint (b
, &dummy_addr
);
3510 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
)
3512 struct captured_breakpoint_query_args args
;
3514 /* For the moment we don't trust print_one_breakpoint() to not throw
3516 return catch_exceptions (uiout
, do_captured_breakpoint_query
, &args
,
3517 NULL
, RETURN_MASK_ALL
);
3520 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3521 catchpoints, et.al.). */
3524 user_settable_breakpoint (const struct breakpoint
*b
)
3526 return (b
->type
== bp_breakpoint
3527 || b
->type
== bp_catch_load
3528 || b
->type
== bp_catch_unload
3529 || b
->type
== bp_catch_fork
3530 || b
->type
== bp_catch_vfork
3531 || b
->type
== bp_catch_exec
3532 || b
->type
== bp_catch_catch
3533 || b
->type
== bp_catch_throw
3534 || b
->type
== bp_hardware_breakpoint
3535 || b
->type
== bp_watchpoint
3536 || b
->type
== bp_read_watchpoint
3537 || b
->type
== bp_access_watchpoint
3538 || b
->type
== bp_hardware_watchpoint
);
3541 /* Print information on user settable breakpoint (watchpoint, etc)
3542 number BNUM. If BNUM is -1 print all user settable breakpoints.
3543 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3546 breakpoint_1 (int bnum
, int allflag
)
3548 register struct breakpoint
*b
;
3549 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3550 int nr_printable_breakpoints
;
3552 /* Compute the number of rows in the table. */
3553 nr_printable_breakpoints
= 0;
3556 || bnum
== b
->number
)
3558 if (allflag
|| user_settable_breakpoint (b
))
3559 nr_printable_breakpoints
++;
3563 ui_out_table_begin (uiout
, 6, nr_printable_breakpoints
, "BreakpointTable");
3565 ui_out_table_begin (uiout
, 5, nr_printable_breakpoints
, "BreakpointTable");
3567 if (nr_printable_breakpoints
> 0)
3568 annotate_breakpoints_headers ();
3569 if (nr_printable_breakpoints
> 0)
3571 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3572 if (nr_printable_breakpoints
> 0)
3574 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3575 if (nr_printable_breakpoints
> 0)
3577 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3578 if (nr_printable_breakpoints
> 0)
3580 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3583 if (nr_printable_breakpoints
> 0)
3585 if (TARGET_ADDR_BIT
<= 32)
3586 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3588 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3590 if (nr_printable_breakpoints
> 0)
3592 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3593 ui_out_table_body (uiout
);
3594 if (nr_printable_breakpoints
> 0)
3595 annotate_breakpoints_table ();
3599 || bnum
== b
->number
)
3601 /* We only print out user settable breakpoints unless the
3603 if (allflag
|| user_settable_breakpoint (b
))
3604 print_one_breakpoint (b
, &last_addr
);
3607 ui_out_table_end (uiout
);
3609 if (nr_printable_breakpoints
== 0)
3612 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3614 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3619 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3620 that a comparison of an unsigned with -1 is always false. */
3621 if (last_addr
!= (CORE_ADDR
) -1)
3622 set_next_address (last_addr
);
3625 /* FIXME? Should this be moved up so that it is only called when
3626 there have been breakpoints? */
3627 annotate_breakpoints_table_end ();
3632 breakpoints_info (char *bnum_exp
, int from_tty
)
3637 bnum
= parse_and_eval_long (bnum_exp
);
3639 breakpoint_1 (bnum
, 0);
3644 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3649 bnum
= parse_and_eval_long (bnum_exp
);
3651 breakpoint_1 (bnum
, 1);
3654 /* Print a message describing any breakpoints set at PC. */
3657 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
)
3659 register int others
= 0;
3660 register struct breakpoint
*b
;
3663 if (b
->address
== pc
) /* address match / overlay match */
3664 if (!overlay_debugging
|| b
->section
== section
)
3668 printf_filtered ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
3670 if (b
->address
== pc
) /* address match / overlay match */
3671 if (!overlay_debugging
|| b
->section
== section
)
3674 printf_filtered ("%d%s%s ",
3676 ((b
->enable_state
== bp_disabled
||
3677 b
->enable_state
== bp_shlib_disabled
||
3678 b
->enable_state
== bp_call_disabled
)
3680 : b
->enable_state
== bp_permanent
3684 : ((others
== 1) ? " and" : ""));
3686 printf_filtered ("also set at pc ");
3687 print_address_numeric (pc
, 1, gdb_stdout
);
3688 printf_filtered (".\n");
3692 /* Set the default place to put a breakpoint
3693 for the `break' command with no arguments. */
3696 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3699 default_breakpoint_valid
= valid
;
3700 default_breakpoint_address
= addr
;
3701 default_breakpoint_symtab
= symtab
;
3702 default_breakpoint_line
= line
;
3705 /* Return true iff it is meaningful to use the address member of
3706 BPT. For some breakpoint types, the address member is irrelevant
3707 and it makes no sense to attempt to compare it to other addresses
3708 (or use it for any other purpose either).
3710 More specifically, each of the following breakpoint types will always
3711 have a zero valued address and we don't want check_duplicates() to mark
3712 breakpoints of any of these types to be a duplicate of an actual
3713 breakpoint at address zero:
3716 bp_hardware_watchpoint
3718 bp_access_watchpoint
3725 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3727 enum bptype type
= bpt
->type
;
3729 return (type
!= bp_watchpoint
3730 && type
!= bp_hardware_watchpoint
3731 && type
!= bp_read_watchpoint
3732 && type
!= bp_access_watchpoint
3733 && type
!= bp_catch_exec
3734 && type
!= bp_longjmp_resume
3735 && type
!= bp_catch_fork
3736 && type
!= bp_catch_vfork
);
3739 /* Rescan breakpoints at the same address and section as BPT,
3740 marking the first one as "first" and any others as "duplicates".
3741 This is so that the bpt instruction is only inserted once.
3742 If we have a permanent breakpoint at the same place as BPT, make
3743 that one the official one, and the rest as duplicates. */
3746 check_duplicates (struct breakpoint
*bpt
)
3748 register struct breakpoint
*b
;
3749 register int count
= 0;
3750 struct breakpoint
*perm_bp
= 0;
3751 CORE_ADDR address
= bpt
->address
;
3752 asection
*section
= bpt
->section
;
3754 if (! breakpoint_address_is_meaningful (bpt
))
3758 if (b
->enable_state
!= bp_disabled
3759 && b
->enable_state
!= bp_shlib_disabled
3760 && b
->enable_state
!= bp_call_disabled
3761 && b
->address
== address
/* address / overlay match */
3762 && (!overlay_debugging
|| b
->section
== section
)
3763 && breakpoint_address_is_meaningful (b
))
3765 /* Have we found a permanent breakpoint? */
3766 if (b
->enable_state
== bp_permanent
)
3773 b
->duplicate
= count
> 1;
3776 /* If we found a permanent breakpoint at this address, go over the
3777 list again and declare all the other breakpoints there to be the
3781 perm_bp
->duplicate
= 0;
3783 /* Permanent breakpoint should always be inserted. */
3784 if (! perm_bp
->inserted
)
3785 internal_error (__FILE__
, __LINE__
,
3786 "allegedly permanent breakpoint is not "
3787 "actually inserted");
3793 internal_error (__FILE__
, __LINE__
,
3794 "another breakpoint was inserted on top of "
3795 "a permanent breakpoint");
3797 if (b
->enable_state
!= bp_disabled
3798 && b
->enable_state
!= bp_shlib_disabled
3799 && b
->enable_state
!= bp_call_disabled
3800 && b
->address
== address
/* address / overlay match */
3801 && (!overlay_debugging
|| b
->section
== section
)
3802 && breakpoint_address_is_meaningful (b
))
3808 /* set_raw_breakpoint() is a low level routine for allocating and
3809 partially initializing a breakpoint of type BPTYPE. The newly
3810 created breakpoint's address, section, source file name, and line
3811 number are provided by SAL. The newly created and partially
3812 initialized breakpoint is added to the breakpoint chain and
3813 is also returned as the value of this function.
3815 It is expected that the caller will complete the initialization of
3816 the newly created breakpoint struct as well as output any status
3817 information regarding the creation of a new breakpoint. In
3818 particular, set_raw_breakpoint() does NOT set the breakpoint
3819 number! Care should be taken to not allow an error() to occur
3820 prior to completing the initialization of the breakpoint. If this
3821 should happen, a bogus breakpoint will be left on the chain. */
3824 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
3826 register struct breakpoint
*b
, *b1
;
3828 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
3829 memset (b
, 0, sizeof (*b
));
3830 b
->address
= sal
.pc
;
3831 if (sal
.symtab
== NULL
)
3832 b
->source_file
= NULL
;
3834 b
->source_file
= savestring (sal
.symtab
->filename
,
3835 strlen (sal
.symtab
->filename
));
3836 b
->section
= sal
.section
;
3838 b
->language
= current_language
->la_language
;
3839 b
->input_radix
= input_radix
;
3841 b
->line_number
= sal
.line
;
3842 b
->enable_state
= bp_enabled
;
3845 b
->ignore_count
= 0;
3847 b
->frame_id
= null_frame_id
;
3848 b
->dll_pathname
= NULL
;
3849 b
->triggered_dll_pathname
= NULL
;
3850 b
->forked_inferior_pid
= 0;
3851 b
->exec_pathname
= NULL
;
3853 /* Add this breakpoint to the end of the chain
3854 so that a list of breakpoints will come out in order
3855 of increasing numbers. */
3857 b1
= breakpoint_chain
;
3859 breakpoint_chain
= b
;
3867 check_duplicates (b
);
3868 breakpoints_changed ();
3874 /* Note that the breakpoint object B describes a permanent breakpoint
3875 instruction, hard-wired into the inferior's code. */
3877 make_breakpoint_permanent (struct breakpoint
*b
)
3879 b
->enable_state
= bp_permanent
;
3881 /* By definition, permanent breakpoints are already present in the code. */
3885 static struct breakpoint
*
3886 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
3888 static int internal_breakpoint_number
= -1;
3889 struct symtab_and_line sal
;
3890 struct breakpoint
*b
;
3892 init_sal (&sal
); /* initialize to zeroes */
3895 sal
.section
= find_pc_overlay (sal
.pc
);
3897 b
= set_raw_breakpoint (sal
, type
);
3898 b
->number
= internal_breakpoint_number
--;
3899 b
->disposition
= disp_donttouch
;
3906 create_longjmp_breakpoint (char *func_name
)
3908 struct breakpoint
*b
;
3909 struct minimal_symbol
*m
;
3911 if (func_name
== NULL
)
3912 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
3915 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
, NULL
)) == NULL
)
3918 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
3921 b
->enable_state
= bp_disabled
;
3924 b
->addr_string
= xstrdup (func_name
);
3927 /* Call this routine when stepping and nexting to enable a breakpoint
3928 if we do a longjmp(). When we hit that breakpoint, call
3929 set_longjmp_resume_breakpoint() to figure out where we are going. */
3932 enable_longjmp_breakpoint (void)
3934 register struct breakpoint
*b
;
3937 if (b
->type
== bp_longjmp
)
3939 b
->enable_state
= bp_enabled
;
3940 check_duplicates (b
);
3945 disable_longjmp_breakpoint (void)
3947 register struct breakpoint
*b
;
3950 if (b
->type
== bp_longjmp
3951 || b
->type
== bp_longjmp_resume
)
3953 b
->enable_state
= bp_disabled
;
3954 check_duplicates (b
);
3959 create_overlay_event_breakpoint (char *func_name
)
3961 struct breakpoint
*b
;
3962 struct minimal_symbol
*m
;
3964 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
, NULL
)) == NULL
)
3967 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
3969 b
->addr_string
= xstrdup (func_name
);
3971 if (overlay_debugging
== ovly_auto
)
3973 b
->enable_state
= bp_enabled
;
3974 overlay_events_enabled
= 1;
3978 b
->enable_state
= bp_disabled
;
3979 overlay_events_enabled
= 0;
3984 enable_overlay_breakpoints (void)
3986 register struct breakpoint
*b
;
3989 if (b
->type
== bp_overlay_event
)
3991 b
->enable_state
= bp_enabled
;
3992 check_duplicates (b
);
3993 overlay_events_enabled
= 1;
3998 disable_overlay_breakpoints (void)
4000 register struct breakpoint
*b
;
4003 if (b
->type
== bp_overlay_event
)
4005 b
->enable_state
= bp_disabled
;
4006 check_duplicates (b
);
4007 overlay_events_enabled
= 0;
4012 create_thread_event_breakpoint (CORE_ADDR address
)
4014 struct breakpoint
*b
;
4016 b
= create_internal_breakpoint (address
, bp_thread_event
);
4018 b
->enable_state
= bp_enabled
;
4019 /* addr_string has to be used or breakpoint_re_set will delete me. */
4020 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->address
));
4026 remove_thread_event_breakpoints (void)
4028 struct breakpoint
*b
, *temp
;
4030 ALL_BREAKPOINTS_SAFE (b
, temp
)
4031 if (b
->type
== bp_thread_event
)
4032 delete_breakpoint (b
);
4037 remove_solib_event_breakpoints (void)
4039 register struct breakpoint
*b
, *temp
;
4041 ALL_BREAKPOINTS_SAFE (b
, temp
)
4042 if (b
->type
== bp_shlib_event
)
4043 delete_breakpoint (b
);
4047 create_solib_event_breakpoint (CORE_ADDR address
)
4049 struct breakpoint
*b
;
4051 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4055 /* Disable any breakpoints that are on code in shared libraries. Only
4056 apply to enabled breakpoints, disabled ones can just stay disabled. */
4059 disable_breakpoints_in_shlibs (int silent
)
4061 struct breakpoint
*b
;
4062 int disabled_shlib_breaks
= 0;
4064 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4067 #if defined (PC_SOLIB)
4068 if (((b
->type
== bp_breakpoint
) ||
4069 (b
->type
== bp_hardware_breakpoint
)) &&
4070 b
->enable_state
== bp_enabled
&&
4072 PC_SOLIB (b
->address
))
4074 b
->enable_state
= bp_shlib_disabled
;
4077 if (!disabled_shlib_breaks
)
4079 target_terminal_ours_for_output ();
4080 warning ("Temporarily disabling shared library breakpoints:");
4082 disabled_shlib_breaks
= 1;
4083 warning ("breakpoint #%d ", b
->number
);
4090 /* Try to reenable any breakpoints in shared libraries. */
4092 re_enable_breakpoints_in_shlibs (void)
4094 struct breakpoint
*b
;
4097 if (b
->enable_state
== bp_shlib_disabled
)
4101 /* Do not reenable the breakpoint if the shared library
4102 is still not mapped in. */
4103 if (target_read_memory (b
->address
, buf
, 1) == 0)
4104 b
->enable_state
= bp_enabled
;
4111 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
4112 char *cond_string
, enum bptype bp_kind
)
4114 struct breakpoint
*b
;
4115 struct symtabs_and_lines sals
;
4116 struct cleanup
*old_chain
;
4117 struct cleanup
*canonical_strings_chain
= NULL
;
4118 char *addr_start
= hookname
;
4119 char *addr_end
= NULL
;
4120 char **canonical
= (char **) NULL
;
4121 int thread
= -1; /* All threads. */
4123 /* Set a breakpoint on the specified hook. */
4124 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
, 0, &canonical
);
4125 addr_end
= hookname
;
4127 if (sals
.nelts
== 0)
4129 warning ("Unable to set a breakpoint on dynamic linker callback.");
4130 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4131 warning ("GDB will be unable to track shl_load/shl_unload calls");
4134 if (sals
.nelts
!= 1)
4136 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4137 warning ("GDB will be unable to track shl_load/shl_unload calls");
4141 /* Make sure that all storage allocated in decode_line_1 gets freed
4142 in case the following errors out. */
4143 old_chain
= make_cleanup (xfree
, sals
.sals
);
4144 if (canonical
!= (char **) NULL
)
4146 make_cleanup (xfree
, canonical
);
4147 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
4148 if (canonical
[0] != NULL
)
4149 make_cleanup (xfree
, canonical
[0]);
4152 resolve_sal_pc (&sals
.sals
[0]);
4154 /* Remove the canonical strings from the cleanup, they are needed below. */
4155 if (canonical
!= (char **) NULL
)
4156 discard_cleanups (canonical_strings_chain
);
4158 b
= set_raw_breakpoint (sals
.sals
[0], bp_kind
);
4159 set_breakpoint_count (breakpoint_count
+ 1);
4160 b
->number
= breakpoint_count
;
4162 b
->cond_string
= (cond_string
== NULL
) ?
4163 NULL
: savestring (cond_string
, strlen (cond_string
));
4166 if (canonical
!= (char **) NULL
&& canonical
[0] != NULL
)
4167 b
->addr_string
= canonical
[0];
4168 else if (addr_start
)
4169 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
4171 b
->enable_state
= bp_enabled
;
4172 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4174 if (dll_pathname
== NULL
)
4175 b
->dll_pathname
= NULL
;
4178 b
->dll_pathname
= (char *) xmalloc (strlen (dll_pathname
) + 1);
4179 strcpy (b
->dll_pathname
, dll_pathname
);
4183 do_cleanups (old_chain
);
4187 create_solib_load_event_breakpoint (char *hookname
, int tempflag
,
4188 char *dll_pathname
, char *cond_string
)
4190 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4191 cond_string
, bp_catch_load
);
4195 create_solib_unload_event_breakpoint (char *hookname
, int tempflag
,
4196 char *dll_pathname
, char *cond_string
)
4198 solib_load_unload_1 (hookname
,tempflag
, dll_pathname
,
4199 cond_string
, bp_catch_unload
);
4203 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4204 enum bptype bp_kind
)
4206 struct symtab_and_line sal
;
4207 struct breakpoint
*b
;
4208 int thread
= -1; /* All threads. */
4215 b
= set_raw_breakpoint (sal
, bp_kind
);
4216 set_breakpoint_count (breakpoint_count
+ 1);
4217 b
->number
= breakpoint_count
;
4219 b
->cond_string
= (cond_string
== NULL
) ?
4220 NULL
: savestring (cond_string
, strlen (cond_string
));
4222 b
->addr_string
= NULL
;
4223 b
->enable_state
= bp_enabled
;
4224 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4225 b
->forked_inferior_pid
= 0;
4231 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4233 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4237 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4239 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4243 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4245 struct symtab_and_line sal
;
4246 struct breakpoint
*b
;
4247 int thread
= -1; /* All threads. */
4254 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4255 set_breakpoint_count (breakpoint_count
+ 1);
4256 b
->number
= breakpoint_count
;
4258 b
->cond_string
= (cond_string
== NULL
) ?
4259 NULL
: savestring (cond_string
, strlen (cond_string
));
4261 b
->addr_string
= NULL
;
4262 b
->enable_state
= bp_enabled
;
4263 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4269 hw_breakpoint_used_count (void)
4271 register struct breakpoint
*b
;
4276 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4284 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4286 register struct breakpoint
*b
;
4289 *other_type_used
= 0;
4292 if (b
->enable_state
== bp_enabled
)
4294 if (b
->type
== type
)
4296 else if ((b
->type
== bp_hardware_watchpoint
||
4297 b
->type
== bp_read_watchpoint
||
4298 b
->type
== bp_access_watchpoint
)
4299 && b
->enable_state
== bp_enabled
)
4300 *other_type_used
= 1;
4306 /* Call this after hitting the longjmp() breakpoint. Use this to set
4307 a new breakpoint at the target of the jmp_buf.
4309 FIXME - This ought to be done by setting a temporary breakpoint
4310 that gets deleted automatically... */
4313 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_id frame_id
)
4315 register struct breakpoint
*b
;
4318 if (b
->type
== bp_longjmp_resume
)
4321 b
->enable_state
= bp_enabled
;
4322 b
->frame_id
= frame_id
;
4323 check_duplicates (b
);
4329 disable_watchpoints_before_interactive_call_start (void)
4331 struct breakpoint
*b
;
4335 if (((b
->type
== bp_watchpoint
)
4336 || (b
->type
== bp_hardware_watchpoint
)
4337 || (b
->type
== bp_read_watchpoint
)
4338 || (b
->type
== bp_access_watchpoint
)
4339 || ep_is_exception_catchpoint (b
))
4340 && (b
->enable_state
== bp_enabled
))
4342 b
->enable_state
= bp_call_disabled
;
4343 check_duplicates (b
);
4349 enable_watchpoints_after_interactive_call_stop (void)
4351 struct breakpoint
*b
;
4355 if (((b
->type
== bp_watchpoint
)
4356 || (b
->type
== bp_hardware_watchpoint
)
4357 || (b
->type
== bp_read_watchpoint
)
4358 || (b
->type
== bp_access_watchpoint
)
4359 || ep_is_exception_catchpoint (b
))
4360 && (b
->enable_state
== bp_call_disabled
))
4362 b
->enable_state
= bp_enabled
;
4363 check_duplicates (b
);
4369 /* Set a breakpoint that will evaporate an end of command
4370 at address specified by SAL.
4371 Restrict it to frame FRAME if FRAME is nonzero. */
4374 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4377 register struct breakpoint
*b
;
4378 b
= set_raw_breakpoint (sal
, type
);
4379 b
->enable_state
= bp_enabled
;
4380 b
->disposition
= disp_donttouch
;
4381 b
->frame_id
= frame_id
;
4383 /* If we're debugging a multi-threaded program, then we
4384 want momentary breakpoints to be active in only a
4385 single thread of control. */
4386 if (in_thread_list (inferior_ptid
))
4387 b
->thread
= pid_to_thread_id (inferior_ptid
);
4393 /* Tell the user we have just set a breakpoint B. */
4396 mention (struct breakpoint
*b
)
4399 struct cleanup
*old_chain
;
4400 struct ui_stream
*stb
;
4402 stb
= ui_out_stream_new (uiout
);
4403 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4405 /* FIXME: This is misplaced; mention() is called by things (like hitting a
4406 watchpoint) other than breakpoint creation. It should be possible to
4407 clean this up and at the same time replace the random calls to
4408 breakpoint_changed with this hook, as has already been done for
4409 delete_breakpoint_hook and so on. */
4410 if (create_breakpoint_hook
)
4411 create_breakpoint_hook (b
);
4412 breakpoint_create_event (b
->number
);
4417 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b
->number
);
4420 ui_out_text (uiout
, "Watchpoint ");
4421 ui_out_tuple_begin (uiout
, "wpt");
4422 ui_out_field_int (uiout
, "number", b
->number
);
4423 ui_out_text (uiout
, ": ");
4424 print_expression (b
->exp
, stb
->stream
);
4425 ui_out_field_stream (uiout
, "exp", stb
);
4426 ui_out_tuple_end (uiout
);
4428 case bp_hardware_watchpoint
:
4429 ui_out_text (uiout
, "Hardware watchpoint ");
4430 ui_out_tuple_begin (uiout
, "wpt");
4431 ui_out_field_int (uiout
, "number", b
->number
);
4432 ui_out_text (uiout
, ": ");
4433 print_expression (b
->exp
, stb
->stream
);
4434 ui_out_field_stream (uiout
, "exp", stb
);
4435 ui_out_tuple_end (uiout
);
4437 case bp_read_watchpoint
:
4438 ui_out_text (uiout
, "Hardware read watchpoint ");
4439 ui_out_tuple_begin (uiout
, "hw-rwpt");
4440 ui_out_field_int (uiout
, "number", b
->number
);
4441 ui_out_text (uiout
, ": ");
4442 print_expression (b
->exp
, stb
->stream
);
4443 ui_out_field_stream (uiout
, "exp", stb
);
4444 ui_out_tuple_end (uiout
);
4446 case bp_access_watchpoint
:
4447 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4448 ui_out_tuple_begin (uiout
, "hw-awpt");
4449 ui_out_field_int (uiout
, "number", b
->number
);
4450 ui_out_text (uiout
, ": ");
4451 print_expression (b
->exp
, stb
->stream
);
4452 ui_out_field_stream (uiout
, "exp", stb
);
4453 ui_out_tuple_end (uiout
);
4456 if (ui_out_is_mi_like_p (uiout
))
4461 printf_filtered ("Breakpoint %d", b
->number
);
4464 case bp_hardware_breakpoint
:
4465 if (ui_out_is_mi_like_p (uiout
))
4470 printf_filtered ("Hardware assisted breakpoint %d", b
->number
);
4474 case bp_catch_unload
:
4475 printf_filtered ("Catchpoint %d (%s %s)",
4477 (b
->type
== bp_catch_load
) ? "load" : "unload",
4478 (b
->dll_pathname
!= NULL
) ?
4479 b
->dll_pathname
: "<any library>");
4482 case bp_catch_vfork
:
4483 printf_filtered ("Catchpoint %d (%s)",
4485 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4488 printf_filtered ("Catchpoint %d (exec)",
4491 case bp_catch_catch
:
4492 case bp_catch_throw
:
4493 printf_filtered ("Catchpoint %d (%s)",
4495 (b
->type
== bp_catch_catch
) ? "catch" : "throw");
4501 case bp_longjmp_resume
:
4502 case bp_step_resume
:
4503 case bp_through_sigtramp
:
4505 case bp_watchpoint_scope
:
4506 case bp_shlib_event
:
4507 case bp_thread_event
:
4508 case bp_overlay_event
:
4513 if (addressprint
|| b
->source_file
== NULL
)
4515 printf_filtered (" at ");
4516 print_address_numeric (b
->address
, 1, gdb_stdout
);
4519 printf_filtered (": file %s, line %d.",
4520 b
->source_file
, b
->line_number
);
4522 do_cleanups (old_chain
);
4523 if (ui_out_is_mi_like_p (uiout
))
4525 printf_filtered ("\n");
4529 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4530 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4531 COND[i] and COND_STRING[i] values.
4533 NOTE: If the function succeeds, the caller is expected to cleanup
4534 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4535 array contents). If the function fails (error() is called), the
4536 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4537 COND and SALS arrays and each of those arrays contents. */
4540 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
4541 struct expression
**cond
, char **cond_string
,
4542 enum bptype type
, enum bpdisp disposition
,
4543 int thread
, int ignore_count
, int from_tty
)
4545 if (type
== bp_hardware_breakpoint
)
4547 int i
= hw_breakpoint_used_count ();
4548 int target_resources_ok
=
4549 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
4551 if (target_resources_ok
== 0)
4552 error ("No hardware breakpoint support in the target.");
4553 else if (target_resources_ok
< 0)
4554 error ("Hardware breakpoints used exceeds limit.");
4557 /* Now set all the breakpoints. */
4560 for (i
= 0; i
< sals
.nelts
; i
++)
4562 struct breakpoint
*b
;
4563 struct symtab_and_line sal
= sals
.sals
[i
];
4566 describe_other_breakpoints (sal
.pc
, sal
.section
);
4568 b
= set_raw_breakpoint (sal
, type
);
4569 set_breakpoint_count (breakpoint_count
+ 1);
4570 b
->number
= breakpoint_count
;
4574 b
->addr_string
= addr_string
[i
];
4576 /* addr_string has to be used or breakpoint_re_set will delete
4578 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->address
));
4579 b
->cond_string
= cond_string
[i
];
4580 b
->ignore_count
= ignore_count
;
4581 b
->enable_state
= bp_enabled
;
4582 b
->disposition
= disposition
;
4588 /* Parse ARG which is assumed to be a SAL specification possibly
4589 followed by conditionals. On return, SALS contains an array of SAL
4590 addresses found. ADDR_STRING contains a vector of (canonical)
4591 address strings. ARG points to the end of the SAL. */
4594 parse_breakpoint_sals (char **address
,
4595 struct symtabs_and_lines
*sals
,
4596 char ***addr_string
)
4598 char *addr_start
= *address
;
4599 *addr_string
= NULL
;
4600 /* If no arg given, or if first arg is 'if ', use the default
4602 if ((*address
) == NULL
4603 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
4605 if (default_breakpoint_valid
)
4607 struct symtab_and_line sal
;
4608 init_sal (&sal
); /* initialize to zeroes */
4609 sals
->sals
= (struct symtab_and_line
*)
4610 xmalloc (sizeof (struct symtab_and_line
));
4611 sal
.pc
= default_breakpoint_address
;
4612 sal
.line
= default_breakpoint_line
;
4613 sal
.symtab
= default_breakpoint_symtab
;
4614 sal
.section
= find_pc_overlay (sal
.pc
);
4615 sals
->sals
[0] = sal
;
4619 error ("No default breakpoint address now.");
4623 /* Force almost all breakpoints to be in terms of the
4624 current_source_symtab (which is decode_line_1's default). This
4625 should produce the results we want almost all of the time while
4626 leaving default_breakpoint_* alone.
4627 ObjC: However, don't match an Objective-C method name which
4628 may have a '+' or '-' succeeded by a '[' */
4630 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
4632 if (default_breakpoint_valid
4634 || ((strchr ("+-", (*address
)[0]) != NULL
)
4635 && ((*address
)[1] != '['))))
4636 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
4637 default_breakpoint_line
, addr_string
);
4639 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0, addr_string
);
4641 /* For any SAL that didn't have a canonical string, fill one in. */
4642 if (sals
->nelts
> 0 && *addr_string
== NULL
)
4643 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
4644 if (addr_start
!= (*address
))
4647 for (i
= 0; i
< sals
->nelts
; i
++)
4649 /* Add the string if not present. */
4650 if ((*addr_string
)[i
] == NULL
)
4651 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
4657 /* Convert each SAL into a real PC. Verify that the PC can be
4658 inserted as a breakpoint. If it can't throw an error. */
4661 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
4665 for (i
= 0; i
< sals
->nelts
; i
++)
4667 resolve_sal_pc (&sals
->sals
[i
]);
4669 /* It's possible for the PC to be nonzero, but still an illegal
4670 value on some targets.
4672 For example, on HP-UX if you start gdb, and before running the
4673 inferior you try to set a breakpoint on a shared library function
4674 "foo" where the inferior doesn't call "foo" directly but does
4675 pass its address to another function call, then we do find a
4676 minimal symbol for the "foo", but it's address is invalid.
4677 (Appears to be an index into a table that the loader sets up
4678 when the inferior is run.)
4680 Give the target a chance to bless sals.sals[i].pc before we
4681 try to make a breakpoint for it. */
4682 if (PC_REQUIRES_RUN_BEFORE_USE (sals
->sals
[i
].pc
))
4684 if (address
== NULL
)
4685 error ("Cannot break without a running program.");
4687 error ("Cannot break on %s without a running program.",
4693 /* Set a breakpoint according to ARG (function, linenum or *address)
4694 flag: first bit : 0 non-temporary, 1 temporary.
4695 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
4698 break_command_1 (char *arg
, int flag
, int from_tty
)
4700 int tempflag
, hardwareflag
;
4701 struct symtabs_and_lines sals
;
4702 register struct expression
**cond
= 0;
4703 /* Pointers in arg to the start, and one past the end, of the
4705 char **cond_string
= (char **) NULL
;
4706 char *addr_start
= arg
;
4708 struct cleanup
*old_chain
;
4709 struct cleanup
*breakpoint_chain
= NULL
;
4712 int ignore_count
= 0;
4714 hardwareflag
= flag
& BP_HARDWAREFLAG
;
4715 tempflag
= flag
& BP_TEMPFLAG
;
4720 parse_breakpoint_sals (&arg
, &sals
, &addr_string
);
4725 /* Create a chain of things that always need to be cleaned up. */
4726 old_chain
= make_cleanup (null_cleanup
, 0);
4728 /* Make sure that all storage allocated to SALS gets freed. */
4729 make_cleanup (xfree
, sals
.sals
);
4731 /* Cleanup the addr_string array but not its contents. */
4732 make_cleanup (xfree
, addr_string
);
4734 /* Allocate space for all the cond expressions. */
4735 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
4736 make_cleanup (xfree
, cond
);
4738 /* Allocate space for all the cond strings. */
4739 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
4740 make_cleanup (xfree
, cond_string
);
4742 /* ----------------------------- SNIP -----------------------------
4743 Anything added to the cleanup chain beyond this point is assumed
4744 to be part of a breakpoint. If the breakpoint create succeeds
4745 then the memory is not reclaimed. */
4746 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
4748 /* Mark the contents of the addr_string for cleanup. These go on
4749 the breakpoint_chain and only occure if the breakpoint create
4751 for (i
= 0; i
< sals
.nelts
; i
++)
4753 if (addr_string
[i
] != NULL
)
4754 make_cleanup (xfree
, addr_string
[i
]);
4757 /* Resolve all line numbers to PC's and verify that the addresses
4758 are ok for the target. */
4759 breakpoint_sals_to_pc (&sals
, addr_start
);
4761 /* Verify that condition can be parsed, before setting any
4762 breakpoints. Allocate a separate condition expression for each
4764 thread
= -1; /* No specific thread yet */
4765 for (i
= 0; i
< sals
.nelts
; i
++)
4772 char *cond_start
= NULL
;
4773 char *cond_end
= NULL
;
4774 while (*tok
== ' ' || *tok
== '\t')
4779 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
4782 toklen
= end_tok
- tok
;
4784 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
4786 tok
= cond_start
= end_tok
+ 1;
4787 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
4788 make_cleanup (xfree
, cond
[i
]);
4790 cond_string
[i
] = savestring (cond_start
, cond_end
- cond_start
);
4791 make_cleanup (xfree
, cond_string
[i
]);
4793 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
4799 thread
= strtol (tok
, &tok
, 0);
4801 error ("Junk after thread keyword.");
4802 if (!valid_thread_id (thread
))
4803 error ("Unknown thread %d\n", thread
);
4806 error ("Junk at end of arguments.");
4810 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
4811 hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
4812 tempflag
? disp_del
: disp_donttouch
,
4813 thread
, ignore_count
, from_tty
);
4817 warning ("Multiple breakpoints were set.");
4818 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
4820 /* That's it. Discard the cleanups for data inserted into the
4822 discard_cleanups (breakpoint_chain
);
4823 /* But cleanup everything else. */
4824 do_cleanups (old_chain
);
4827 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
4828 linenum or *address) with COND and IGNORE_COUNT. */
4830 struct captured_breakpoint_args
4841 do_captured_breakpoint (void *data
)
4843 struct captured_breakpoint_args
*args
= data
;
4844 struct symtabs_and_lines sals
;
4845 register struct expression
**cond
;
4846 struct cleanup
*old_chain
;
4847 struct cleanup
*breakpoint_chain
= NULL
;
4854 /* Parse the source and lines spec. Delay check that the expression
4855 didn't contain trailing garbage until after cleanups are in
4859 address_end
= args
->address
;
4861 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
);
4866 /* Create a chain of things at always need to be cleaned up. */
4867 old_chain
= make_cleanup (null_cleanup
, 0);
4869 /* Always have a addr_string array, even if it is empty. */
4870 make_cleanup (xfree
, addr_string
);
4872 /* Make sure that all storage allocated to SALS gets freed. */
4873 make_cleanup (xfree
, sals
.sals
);
4875 /* Allocate space for all the cond expressions. */
4876 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
4877 make_cleanup (xfree
, cond
);
4879 /* Allocate space for all the cond strings. */
4880 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
4881 make_cleanup (xfree
, cond_string
);
4883 /* ----------------------------- SNIP -----------------------------
4884 Anything added to the cleanup chain beyond this point is assumed
4885 to be part of a breakpoint. If the breakpoint create goes
4886 through then that memory is not cleaned up. */
4887 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
4889 /* Mark the contents of the addr_string for cleanup. These go on
4890 the breakpoint_chain and only occure if the breakpoint create
4892 for (i
= 0; i
< sals
.nelts
; i
++)
4894 if (addr_string
[i
] != NULL
)
4895 make_cleanup (xfree
, addr_string
[i
]);
4898 /* Wait until now before checking for garbage at the end of the
4899 address. That way cleanups can take care of freeing any
4901 if (*address_end
!= '\0')
4902 error ("Garbage %s following breakpoint address", address_end
);
4904 /* Resolve all line numbers to PC's. */
4905 breakpoint_sals_to_pc (&sals
, args
->address
);
4907 /* Verify that conditions can be parsed, before setting any
4909 for (i
= 0; i
< sals
.nelts
; i
++)
4911 if (args
->condition
!= NULL
)
4913 char *tok
= args
->condition
;
4914 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
4916 error ("Garbage %s follows condition", tok
);
4917 make_cleanup (xfree
, cond
[i
]);
4918 cond_string
[i
] = xstrdup (args
->condition
);
4922 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
4923 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
4924 args
->tempflag
? disp_del
: disp_donttouch
,
4925 args
->thread
, args
->ignore_count
, 0/*from-tty*/);
4927 /* That's it. Discard the cleanups for data inserted into the
4929 discard_cleanups (breakpoint_chain
);
4930 /* But cleanup everything else. */
4931 do_cleanups (old_chain
);
4936 gdb_breakpoint (char *address
, char *condition
,
4937 int hardwareflag
, int tempflag
,
4938 int thread
, int ignore_count
)
4940 struct captured_breakpoint_args args
;
4941 args
.address
= address
;
4942 args
.condition
= condition
;
4943 args
.hardwareflag
= hardwareflag
;
4944 args
.tempflag
= tempflag
;
4945 args
.thread
= thread
;
4946 args
.ignore_count
= ignore_count
;
4947 return catch_errors (do_captured_breakpoint
, &args
,
4948 NULL
, RETURN_MASK_ALL
);
4953 break_at_finish_at_depth_command_1 (char *arg
, int flag
, int from_tty
)
4955 struct frame_info
*frame
;
4956 CORE_ADDR low
, high
, selected_pc
= 0;
4957 char *extra_args
= NULL
;
4960 int extra_args_len
= 0, if_arg
= 0;
4963 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
4966 if (default_breakpoint_valid
)
4968 if (deprecated_selected_frame
)
4970 selected_pc
= get_frame_pc (deprecated_selected_frame
);
4975 error ("No selected frame.");
4978 error ("No default breakpoint address now.");
4982 extra_args
= strchr (arg
, ' ');
4986 extra_args_len
= strlen (extra_args
);
4987 level_arg
= (char *) xmalloc (extra_args
- arg
);
4988 strncpy (level_arg
, arg
, extra_args
- arg
- 1);
4989 level_arg
[extra_args
- arg
- 1] = '\0';
4993 level_arg
= (char *) xmalloc (strlen (arg
) + 1);
4994 strcpy (level_arg
, arg
);
4997 frame
= parse_frame_specification (level_arg
);
4999 selected_pc
= get_frame_pc (frame
);
5006 extra_args_len
= strlen (arg
);
5011 if (find_pc_partial_function (selected_pc
, (char **) NULL
, &low
, &high
))
5013 addr_string
= (char *) xmalloc (26 + extra_args_len
);
5015 sprintf (addr_string
, "*0x%s %s", paddr_nz (high
), extra_args
);
5017 sprintf (addr_string
, "*0x%s", paddr_nz (high
));
5018 break_command_1 (addr_string
, flag
, from_tty
);
5019 xfree (addr_string
);
5022 error ("No function contains the specified address");
5025 error ("Unable to set breakpoint at procedure exit");
5030 break_at_finish_command_1 (char *arg
, int flag
, int from_tty
)
5032 char *addr_string
, *break_string
, *beg_addr_string
;
5033 CORE_ADDR low
, high
;
5034 struct symtabs_and_lines sals
;
5035 struct symtab_and_line sal
;
5036 struct cleanup
*old_chain
;
5037 char *extra_args
= NULL
;
5038 int extra_args_len
= 0;
5042 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5044 if (default_breakpoint_valid
)
5046 if (deprecated_selected_frame
)
5048 addr_string
= (char *) xmalloc (15);
5049 sprintf (addr_string
, "*0x%s",
5050 paddr_nz (get_frame_pc (deprecated_selected_frame
)));
5055 error ("No selected frame.");
5058 error ("No default breakpoint address now.");
5062 addr_string
= (char *) xmalloc (strlen (arg
) + 1);
5063 strcpy (addr_string
, arg
);
5069 extra_args_len
= strlen (arg
);
5073 /* get the stuff after the function name or address */
5074 extra_args
= strchr (arg
, ' ');
5078 extra_args_len
= strlen (extra_args
);
5085 beg_addr_string
= addr_string
;
5086 sals
= decode_line_1 (&addr_string
, 1, (struct symtab
*) NULL
, 0,
5089 xfree (beg_addr_string
);
5090 old_chain
= make_cleanup (xfree
, sals
.sals
);
5091 for (i
= 0; (i
< sals
.nelts
); i
++)
5094 if (find_pc_partial_function (sal
.pc
, (char **) NULL
, &low
, &high
))
5096 break_string
= (char *) xmalloc (extra_args_len
+ 26);
5098 sprintf (break_string
, "*0x%s %s", paddr_nz (high
), extra_args
);
5100 sprintf (break_string
, "*0x%s", paddr_nz (high
));
5101 break_command_1 (break_string
, flag
, from_tty
);
5102 xfree (break_string
);
5105 error ("No function contains the specified address");
5109 warning ("Multiple breakpoints were set.\n");
5110 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5112 do_cleanups (old_chain
);
5116 /* Helper function for break_command_1 and disassemble_command. */
5119 resolve_sal_pc (struct symtab_and_line
*sal
)
5123 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5125 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5126 error ("No line %d in file \"%s\".",
5127 sal
->line
, sal
->symtab
->filename
);
5131 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5133 struct blockvector
*bv
;
5138 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &index
, sal
->symtab
);
5141 b
= BLOCKVECTOR_BLOCK (bv
, index
);
5142 sym
= block_function (b
);
5145 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5146 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5150 /* It really is worthwhile to have the section, so we'll just
5151 have to look harder. This case can be executed if we have
5152 line numbers but no functions (as can happen in assembly
5155 struct minimal_symbol
*msym
;
5157 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5159 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5166 break_command (char *arg
, int from_tty
)
5168 break_command_1 (arg
, 0, from_tty
);
5172 break_at_finish_command (char *arg
, int from_tty
)
5174 break_at_finish_command_1 (arg
, 0, from_tty
);
5178 break_at_finish_at_depth_command (char *arg
, int from_tty
)
5180 break_at_finish_at_depth_command_1 (arg
, 0, from_tty
);
5184 tbreak_command (char *arg
, int from_tty
)
5186 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5190 tbreak_at_finish_command (char *arg
, int from_tty
)
5192 break_at_finish_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5196 hbreak_command (char *arg
, int from_tty
)
5198 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5202 thbreak_command (char *arg
, int from_tty
)
5204 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5208 stop_command (char *arg
, int from_tty
)
5210 printf_filtered ("Specify the type of breakpoint to set.\n\
5211 Usage: stop in <function | address>\n\
5216 stopin_command (char *arg
, int from_tty
)
5220 if (arg
== (char *) NULL
)
5222 else if (*arg
!= '*')
5227 /* look for a ':'. If this is a line number specification, then
5228 say it is bad, otherwise, it should be an address or
5229 function/method name */
5230 while (*argptr
&& !hasColon
)
5232 hasColon
= (*argptr
== ':');
5237 badInput
= (*argptr
!= ':'); /* Not a class::method */
5239 badInput
= isdigit (*arg
); /* a simple line number */
5243 printf_filtered ("Usage: stop in <function | address>\n");
5245 break_command_1 (arg
, 0, from_tty
);
5249 stopat_command (char *arg
, int from_tty
)
5253 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5260 /* look for a ':'. If there is a '::' then get out, otherwise
5261 it is probably a line number. */
5262 while (*argptr
&& !hasColon
)
5264 hasColon
= (*argptr
== ':');
5269 badInput
= (*argptr
== ':'); /* we have class::method */
5271 badInput
= !isdigit (*arg
); /* not a line number */
5275 printf_filtered ("Usage: stop at <line>\n");
5277 break_command_1 (arg
, 0, from_tty
);
5281 /* accessflag: hw_write: watch write,
5282 hw_read: watch read,
5283 hw_access: watch access (read or write) */
5285 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5287 struct breakpoint
*b
;
5288 struct symtab_and_line sal
;
5289 struct expression
*exp
;
5290 struct block
*exp_valid_block
;
5291 struct value
*val
, *mark
;
5292 struct frame_info
*frame
;
5293 struct frame_info
*prev_frame
= NULL
;
5294 char *exp_start
= NULL
;
5295 char *exp_end
= NULL
;
5296 char *tok
, *end_tok
;
5298 char *cond_start
= NULL
;
5299 char *cond_end
= NULL
;
5300 struct expression
*cond
= NULL
;
5301 int i
, other_type_used
, target_resources_ok
= 0;
5302 enum bptype bp_type
;
5305 init_sal (&sal
); /* initialize to zeroes */
5307 /* Parse arguments. */
5308 innermost_block
= NULL
;
5310 exp
= parse_exp_1 (&arg
, 0, 0);
5312 exp_valid_block
= innermost_block
;
5313 mark
= value_mark ();
5314 val
= evaluate_expression (exp
);
5315 release_value (val
);
5316 if (VALUE_LAZY (val
))
5317 value_fetch_lazy (val
);
5320 while (*tok
== ' ' || *tok
== '\t')
5324 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5327 toklen
= end_tok
- tok
;
5328 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5330 tok
= cond_start
= end_tok
+ 1;
5331 cond
= parse_exp_1 (&tok
, 0, 0);
5335 error ("Junk at end of command.");
5337 if (accessflag
== hw_read
)
5338 bp_type
= bp_read_watchpoint
;
5339 else if (accessflag
== hw_access
)
5340 bp_type
= bp_access_watchpoint
;
5342 bp_type
= bp_hardware_watchpoint
;
5344 mem_cnt
= can_use_hardware_watchpoint (val
);
5345 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5346 error ("Expression cannot be implemented with read/access watchpoint.");
5349 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5350 target_resources_ok
=
5351 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5353 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5354 error ("Target does not support this type of hardware watchpoint.");
5356 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5357 error ("Target can only support one kind of HW watchpoint at a time.");
5360 #if defined(HPUXHPPA)
5361 /* On HP-UX if you set a h/w
5362 watchpoint before the "run" command, the inferior dies with a e.g.,
5363 SIGILL once you start it. I initially believed this was due to a
5364 bad interaction between page protection traps and the initial
5365 startup sequence by the dynamic linker.
5367 However, I tried avoiding that by having HP-UX's implementation of
5368 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5369 yet, which forced slow watches before a "run" or "attach", and it
5370 still fails somewhere in the startup code.
5372 Until I figure out what's happening, I'm disallowing watches altogether
5373 before the "run" or "attach" command. We'll tell the user they must
5374 set watches after getting the program started. */
5375 if (!target_has_execution
)
5377 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5380 #endif /* HPUXHPPA */
5382 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5383 watchpoint could not be set. */
5384 if (!mem_cnt
|| target_resources_ok
<= 0)
5385 bp_type
= bp_watchpoint
;
5387 /* Now set up the breakpoint. */
5388 b
= set_raw_breakpoint (sal
, bp_type
);
5389 set_breakpoint_count (breakpoint_count
+ 1);
5390 b
->number
= breakpoint_count
;
5391 b
->disposition
= disp_donttouch
;
5393 b
->exp_valid_block
= exp_valid_block
;
5394 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5398 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5402 frame
= block_innermost_frame (exp_valid_block
);
5405 prev_frame
= get_prev_frame (frame
);
5406 b
->watchpoint_frame
= get_frame_id (frame
);
5410 memset (&b
->watchpoint_frame
, 0, sizeof (b
->watchpoint_frame
));
5413 /* If the expression is "local", then set up a "watchpoint scope"
5414 breakpoint at the point where we've left the scope of the watchpoint
5416 if (innermost_block
)
5420 struct breakpoint
*scope_breakpoint
;
5421 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5422 bp_watchpoint_scope
);
5424 scope_breakpoint
->enable_state
= bp_enabled
;
5426 /* Automatically delete the breakpoint when it hits. */
5427 scope_breakpoint
->disposition
= disp_del
;
5429 /* Only break in the proper frame (help with recursion). */
5430 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5432 /* Set the address at which we will stop. */
5433 scope_breakpoint
->address
= get_frame_pc (prev_frame
);
5435 /* The scope breakpoint is related to the watchpoint. We
5436 will need to act on them together. */
5437 b
->related_breakpoint
= scope_breakpoint
;
5440 value_free_to_mark (mark
);
5444 /* Return count of locations need to be watched and can be handled
5445 in hardware. If the watchpoint can not be handled
5446 in hardware return zero. */
5448 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
5449 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
5450 ((BYTE_SIZE) <= (REGISTER_SIZE))
5453 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5454 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5455 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5459 can_use_hardware_watchpoint (struct value
*v
)
5461 int found_memory_cnt
= 0;
5462 struct value
*head
= v
;
5464 /* Did the user specifically forbid us to use hardware watchpoints? */
5465 if (!can_use_hw_watchpoints
)
5468 /* Make sure that the value of the expression depends only upon
5469 memory contents, and values computed from them within GDB. If we
5470 find any register references or function calls, we can't use a
5471 hardware watchpoint.
5473 The idea here is that evaluating an expression generates a series
5474 of values, one holding the value of every subexpression. (The
5475 expression a*b+c has five subexpressions: a, b, a*b, c, and
5476 a*b+c.) GDB's values hold almost enough information to establish
5477 the criteria given above --- they identify memory lvalues,
5478 register lvalues, computed values, etcetera. So we can evaluate
5479 the expression, and then scan the chain of values that leaves
5480 behind to decide whether we can detect any possible change to the
5481 expression's final value using only hardware watchpoints.
5483 However, I don't think that the values returned by inferior
5484 function calls are special in any way. So this function may not
5485 notice that an expression involving an inferior function call
5486 can't be watched with hardware watchpoints. FIXME. */
5487 for (; v
; v
= v
->next
)
5489 if (VALUE_LVAL (v
) == lval_memory
)
5492 /* A lazy memory lvalue is one that GDB never needed to fetch;
5493 we either just used its address (e.g., `a' in `a.b') or
5494 we never needed it at all (e.g., `a' in `a,b'). */
5498 /* Ahh, memory we actually used! Check if we can cover
5499 it with hardware watchpoints. */
5500 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
5502 /* We only watch structs and arrays if user asked for it
5503 explicitly, never if they just happen to appear in a
5504 middle of some value chain. */
5506 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
5507 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
5509 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
5510 int len
= TYPE_LENGTH (VALUE_TYPE (v
));
5512 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
5519 else if (v
->lval
!= not_lval
&& v
->modifiable
== 0)
5520 return 0; /* ??? What does this represent? */
5521 else if (v
->lval
== lval_register
)
5522 return 0; /* cannot watch a register with a HW watchpoint */
5525 /* The expression itself looks suitable for using a hardware
5526 watchpoint, but give the target machine a chance to reject it. */
5527 return found_memory_cnt
;
5531 watch_command_wrapper (char *arg
, int from_tty
)
5533 watch_command (arg
, from_tty
);
5537 watch_command (char *arg
, int from_tty
)
5539 watch_command_1 (arg
, hw_write
, from_tty
);
5543 rwatch_command_wrapper (char *arg
, int from_tty
)
5545 rwatch_command (arg
, from_tty
);
5549 rwatch_command (char *arg
, int from_tty
)
5551 watch_command_1 (arg
, hw_read
, from_tty
);
5555 awatch_command_wrapper (char *arg
, int from_tty
)
5557 awatch_command (arg
, from_tty
);
5561 awatch_command (char *arg
, int from_tty
)
5563 watch_command_1 (arg
, hw_access
, from_tty
);
5567 /* Helper routines for the until_command routine in infcmd.c. Here
5568 because it uses the mechanisms of breakpoints. */
5570 /* This function is called by fetch_inferior_event via the
5571 cmd_continuation pointer, to complete the until command. It takes
5572 care of cleaning up the temporary breakpoints set up by the until
5575 until_break_command_continuation (struct continuation_arg
*arg
)
5577 struct cleanup
*cleanups
;
5579 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
5580 do_exec_cleanups (cleanups
);
5585 until_break_command (char *arg
, int from_tty
)
5587 struct symtabs_and_lines sals
;
5588 struct symtab_and_line sal
;
5589 struct frame_info
*prev_frame
= get_prev_frame (deprecated_selected_frame
);
5590 struct breakpoint
*breakpoint
;
5591 struct cleanup
*old_chain
;
5592 struct continuation_arg
*arg1
;
5595 clear_proceed_status ();
5597 /* Set a breakpoint where the user wants it and at return from
5600 if (default_breakpoint_valid
)
5601 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
5602 default_breakpoint_line
, (char ***) NULL
);
5604 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
5605 0, (char ***) NULL
);
5607 if (sals
.nelts
!= 1)
5608 error ("Couldn't get information on specified line.");
5611 xfree (sals
.sals
); /* malloc'd, so freed */
5614 error ("Junk at end of arguments.");
5616 resolve_sal_pc (&sal
);
5619 set_momentary_breakpoint (sal
,get_frame_id (deprecated_selected_frame
),
5622 if (!event_loop_p
|| !target_can_async_p ())
5623 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
5625 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
5627 /* If we are running asynchronously, and the target supports async
5628 execution, we are not waiting for the target to stop, in the call
5629 tp proceed, below. This means that we cannot delete the
5630 brekpoints until the target has actually stopped. The only place
5631 where we get a chance to do that is in fetch_inferior_event, so
5632 we must set things up for that. */
5634 if (event_loop_p
&& target_can_async_p ())
5636 /* In this case the arg for the continuation is just the point
5637 in the exec_cleanups chain from where to start doing
5638 cleanups, because all the continuation does is the cleanups in
5639 the exec_cleanup_chain. */
5641 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
5643 arg1
->data
.pointer
= old_chain
;
5645 add_continuation (until_break_command_continuation
, arg1
);
5648 /* Keep within the current frame */
5652 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
5653 sal
.pc
= get_frame_pc (prev_frame
);
5654 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
5656 if (!event_loop_p
|| !target_can_async_p ())
5657 make_cleanup_delete_breakpoint (breakpoint
);
5659 make_exec_cleanup_delete_breakpoint (breakpoint
);
5662 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
5663 /* Do the cleanups now, anly if we are not running asynchronously,
5664 of if we are, but the target is still synchronous. */
5665 if (!event_loop_p
|| !target_can_async_p ())
5666 do_cleanups (old_chain
);
5670 /* These aren't used; I don't konw what they were for. */
5671 /* Set a breakpoint at the catch clause for NAME. */
5673 catch_breakpoint (char *name
)
5678 disable_catch_breakpoint (void)
5683 delete_catch_breakpoint (void)
5688 enable_catch_breakpoint (void)
5695 struct sal_chain
*next
;
5696 struct symtab_and_line sal
;
5700 /* Not really used -- invocation in handle_gnu_4_16_catch_command
5701 had been commented out in the v.4.16 sources, and stays
5702 disabled there now because "catch NAME" syntax isn't allowed.
5704 /* This isn't used; I don't know what it was for. */
5705 /* For each catch clause identified in ARGS, run FUNCTION
5706 with that clause as an argument. */
5707 static struct symtabs_and_lines
5708 map_catch_names (char *args
, int (*function
) ())
5710 register char *p
= args
;
5712 struct symtabs_and_lines sals
;
5714 struct sal_chain
*sal_chain
= 0;
5718 error_no_arg ("one or more catch names");
5726 /* Don't swallow conditional part. */
5727 if (p1
[0] == 'i' && p1
[1] == 'f'
5728 && (p1
[2] == ' ' || p1
[2] == '\t'))
5734 while (isalnum (*p1
) || *p1
== '_' || *p1
== '$')
5738 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
5739 error ("Arguments must be catch names.");
5745 struct sal_chain
*next
= (struct sal_chain
*)
5746 alloca (sizeof (struct sal_chain
));
5747 next
->next
= sal_chain
;
5748 next
->sal
= get_catch_sal (p
);
5753 printf_unfiltered ("No catch clause for exception %s.\n", p
);
5758 while (*p
== ' ' || *p
== '\t')
5764 /* This shares a lot of code with `print_frame_label_vars' from stack.c. */
5766 static struct symtabs_and_lines
5767 get_catch_sals (int this_level_only
)
5769 register struct blockvector
*bl
;
5770 register struct block
*block
;
5771 int index
, have_default
= 0;
5773 struct symtabs_and_lines sals
;
5774 struct sal_chain
*sal_chain
= 0;
5775 char *blocks_searched
;
5777 /* Not sure whether an error message is always the correct response,
5778 but it's better than a core dump. */
5779 if (deprecated_selected_frame
== NULL
)
5780 error ("No selected frame.");
5781 block
= get_frame_block (deprecated_selected_frame
, 0);
5782 pc
= get_frame_pc (deprecated_selected_frame
);
5788 error ("No symbol table info available.\n");
5790 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
5791 blocks_searched
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
5792 memset (blocks_searched
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
5796 CORE_ADDR end
= BLOCK_END (block
) - 4;
5799 if (bl
!= blockvector_for_pc (end
, &index
))
5800 error ("blockvector blotch");
5801 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
5802 error ("blockvector botch");
5803 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
5806 /* Don't print out blocks that have gone by. */
5807 while (index
< last_index
5808 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
5811 while (index
< last_index
5812 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
5814 if (blocks_searched
[index
] == 0)
5816 struct block
*b
= BLOCKVECTOR_BLOCK (bl
, index
);
5818 register struct symbol
*sym
;
5820 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
5822 if (STREQ (SYMBOL_NAME (sym
), "default"))
5828 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
5830 struct sal_chain
*next
= (struct sal_chain
*)
5831 alloca (sizeof (struct sal_chain
));
5832 next
->next
= sal_chain
;
5833 next
->sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
),
5838 blocks_searched
[index
] = 1;
5844 if (sal_chain
&& this_level_only
)
5847 /* After handling the function's top-level block, stop.
5848 Don't continue to its superblock, the block of
5849 per-file symbols. */
5850 if (BLOCK_FUNCTION (block
))
5852 block
= BLOCK_SUPERBLOCK (block
);
5857 struct sal_chain
*tmp_chain
;
5859 /* Count the number of entries. */
5860 for (index
= 0, tmp_chain
= sal_chain
; tmp_chain
;
5861 tmp_chain
= tmp_chain
->next
)
5865 sals
.sals
= (struct symtab_and_line
*)
5866 xmalloc (index
* sizeof (struct symtab_and_line
));
5867 for (index
= 0; sal_chain
; sal_chain
= sal_chain
->next
, index
++)
5868 sals
.sals
[index
] = sal_chain
->sal
;
5875 ep_skip_leading_whitespace (char **s
)
5877 if ((s
== NULL
) || (*s
== NULL
))
5879 while (isspace (**s
))
5883 /* This function examines a string, and attempts to find a token
5884 that might be an event name in the leading characters. If a
5885 possible match is found, a pointer to the last character of
5886 the token is returned. Else, NULL is returned. */
5889 ep_find_event_name_end (char *arg
)
5892 char *event_name_end
= NULL
;
5894 /* If we could depend upon the presense of strrpbrk, we'd use that... */
5898 /* We break out of the loop when we find a token delimiter.
5899 Basically, we're looking for alphanumerics and underscores;
5900 anything else delimites the token. */
5903 if (!isalnum (*s
) && (*s
!= '_'))
5909 return event_name_end
;
5913 /* This function attempts to parse an optional "if <cond>" clause
5914 from the arg string. If one is not found, it returns NULL.
5916 Else, it returns a pointer to the condition string. (It does not
5917 attempt to evaluate the string against a particular block.) And,
5918 it updates arg to point to the first character following the parsed
5919 if clause in the arg string. */
5922 ep_parse_optional_if_clause (char **arg
)
5926 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
5929 /* Skip the "if" keyword. */
5932 /* Skip any extra leading whitespace, and record the start of the
5933 condition string. */
5934 ep_skip_leading_whitespace (arg
);
5937 /* Assume that the condition occupies the remainder of the arg string. */
5938 (*arg
) += strlen (cond_string
);
5943 /* This function attempts to parse an optional filename from the arg
5944 string. If one is not found, it returns NULL.
5946 Else, it returns a pointer to the parsed filename. (This function
5947 makes no attempt to verify that a file of that name exists, or is
5948 accessible.) And, it updates arg to point to the first character
5949 following the parsed filename in the arg string.
5951 Note that clients needing to preserve the returned filename for
5952 future access should copy it to their own buffers. */
5954 ep_parse_optional_filename (char **arg
)
5956 static char filename
[1024];
5961 if ((*arg_p
== '\0') || isspace (*arg_p
))
5979 /* Commands to deal with catching events, such as signals, exceptions,
5980 process start/exit, etc. */
5984 catch_fork
, catch_vfork
5988 #if defined(CHILD_INSERT_FORK_CATCHPOINT) || defined(CHILD_INSERT_VFORK_CATCHPOINT)
5989 static void catch_fork_command_1 (catch_fork_kind fork_kind
,
5990 char *arg
, int tempflag
, int from_tty
);
5993 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
5996 char *cond_string
= NULL
;
5998 ep_skip_leading_whitespace (&arg
);
6000 /* The allowed syntax is:
6002 catch [v]fork if <cond>
6004 First, check if there's an if clause. */
6005 cond_string
= ep_parse_optional_if_clause (&arg
);
6007 if ((*arg
!= '\0') && !isspace (*arg
))
6008 error ("Junk at end of arguments.");
6010 /* If this target supports it, create a fork or vfork catchpoint
6011 and enable reporting of such events. */
6015 create_fork_event_catchpoint (tempflag
, cond_string
);
6018 create_vfork_event_catchpoint (tempflag
, cond_string
);
6021 error ("unsupported or unknown fork kind; cannot catch it");
6027 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6029 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6031 char *cond_string
= NULL
;
6033 ep_skip_leading_whitespace (&arg
);
6035 /* The allowed syntax is:
6037 catch exec if <cond>
6039 First, check if there's an if clause. */
6040 cond_string
= ep_parse_optional_if_clause (&arg
);
6042 if ((*arg
!= '\0') && !isspace (*arg
))
6043 error ("Junk at end of arguments.");
6045 /* If this target supports it, create an exec catchpoint
6046 and enable reporting of such events. */
6047 create_exec_event_catchpoint (tempflag
, cond_string
);
6051 #if defined(SOLIB_ADD)
6053 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6055 char *dll_pathname
= NULL
;
6056 char *cond_string
= NULL
;
6058 ep_skip_leading_whitespace (&arg
);
6060 /* The allowed syntax is:
6062 catch load if <cond>
6063 catch load <filename>
6064 catch load <filename> if <cond>
6066 The user is not allowed to specify the <filename> after an
6069 We'll ignore the pathological case of a file named "if".
6071 First, check if there's an if clause. If so, then there
6072 cannot be a filename. */
6073 cond_string
= ep_parse_optional_if_clause (&arg
);
6075 /* If there was an if clause, then there cannot be a filename.
6076 Else, there might be a filename and an if clause. */
6077 if (cond_string
== NULL
)
6079 dll_pathname
= ep_parse_optional_filename (&arg
);
6080 ep_skip_leading_whitespace (&arg
);
6081 cond_string
= ep_parse_optional_if_clause (&arg
);
6084 if ((*arg
!= '\0') && !isspace (*arg
))
6085 error ("Junk at end of arguments.");
6087 /* Create a load breakpoint that only triggers when a load of
6088 the specified dll (or any dll, if no pathname was specified)
6090 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6091 dll_pathname
, cond_string
);
6095 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6097 char *dll_pathname
= NULL
;
6098 char *cond_string
= NULL
;
6100 ep_skip_leading_whitespace (&arg
);
6102 /* The allowed syntax is:
6104 catch unload if <cond>
6105 catch unload <filename>
6106 catch unload <filename> if <cond>
6108 The user is not allowed to specify the <filename> after an
6111 We'll ignore the pathological case of a file named "if".
6113 First, check if there's an if clause. If so, then there
6114 cannot be a filename. */
6115 cond_string
= ep_parse_optional_if_clause (&arg
);
6117 /* If there was an if clause, then there cannot be a filename.
6118 Else, there might be a filename and an if clause. */
6119 if (cond_string
== NULL
)
6121 dll_pathname
= ep_parse_optional_filename (&arg
);
6122 ep_skip_leading_whitespace (&arg
);
6123 cond_string
= ep_parse_optional_if_clause (&arg
);
6126 if ((*arg
!= '\0') && !isspace (*arg
))
6127 error ("Junk at end of arguments.");
6129 /* Create an unload breakpoint that only triggers when an unload of
6130 the specified dll (or any dll, if no pathname was specified)
6132 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6133 dll_pathname
, cond_string
);
6135 #endif /* SOLIB_ADD */
6137 /* Commands to deal with catching exceptions. */
6139 /* Set a breakpoint at the specified callback routine for an
6140 exception event callback */
6143 create_exception_catchpoint (int tempflag
, char *cond_string
,
6144 enum exception_event_kind ex_event
,
6145 struct symtab_and_line
*sal
)
6147 struct breakpoint
*b
;
6148 int thread
= -1; /* All threads. */
6151 if (!sal
) /* no exception support? */
6156 case EX_EVENT_THROW
:
6157 bptype
= bp_catch_throw
;
6159 case EX_EVENT_CATCH
:
6160 bptype
= bp_catch_catch
;
6162 default: /* error condition */
6163 error ("Internal error -- invalid catchpoint kind");
6166 b
= set_raw_breakpoint (*sal
, bptype
);
6167 set_breakpoint_count (breakpoint_count
+ 1);
6168 b
->number
= breakpoint_count
;
6170 b
->cond_string
= (cond_string
== NULL
) ?
6171 NULL
: savestring (cond_string
, strlen (cond_string
));
6173 b
->addr_string
= NULL
;
6174 b
->enable_state
= bp_enabled
;
6175 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6179 /* Deal with "catch catch" and "catch throw" commands */
6182 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6183 int tempflag
, int from_tty
)
6185 char *cond_string
= NULL
;
6186 struct symtab_and_line
*sal
= NULL
;
6188 ep_skip_leading_whitespace (&arg
);
6190 cond_string
= ep_parse_optional_if_clause (&arg
);
6192 if ((*arg
!= '\0') && !isspace (*arg
))
6193 error ("Junk at end of arguments.");
6195 if ((ex_event
!= EX_EVENT_THROW
) &&
6196 (ex_event
!= EX_EVENT_CATCH
))
6197 error ("Unsupported or unknown exception event; cannot catch it");
6199 /* See if we can find a callback routine */
6200 sal
= target_enable_exception_callback (ex_event
, 1);
6204 /* We have callbacks from the runtime system for exceptions.
6205 Set a breakpoint on the sal found, if no errors */
6206 if (sal
!= (struct symtab_and_line
*) -1)
6207 create_exception_catchpoint (tempflag
, cond_string
, ex_event
, sal
);
6209 return; /* something went wrong with setting up callbacks */
6213 /* No callbacks from runtime system for exceptions.
6214 Try GNU C++ exception breakpoints using labels in debug info. */
6215 if (ex_event
== EX_EVENT_CATCH
)
6217 handle_gnu_4_16_catch_command (arg
, tempflag
, from_tty
);
6219 else if (ex_event
== EX_EVENT_THROW
)
6221 /* Set a breakpoint on __raise_exception () */
6223 warning ("Unsupported with this platform/compiler combination.");
6224 warning ("Perhaps you can achieve the effect you want by setting");
6225 warning ("a breakpoint on __raise_exception().");
6230 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6231 inside a catch_errors */
6234 cover_target_enable_exception_callback (PTR arg
)
6236 args_for_catchpoint_enable
*args
= arg
;
6237 struct symtab_and_line
*sal
;
6238 sal
= target_enable_exception_callback (args
->kind
, args
->enable_p
);
6241 else if (sal
== (struct symtab_and_line
*) -1)
6244 return 1; /*is valid */
6249 /* This is the original v.4.16 and earlier version of the
6250 catch_command_1() function. Now that other flavours of "catch"
6251 have been introduced, and since exception handling can be handled
6252 in other ways (through target ops) also, this is used only for the
6253 GNU C++ exception handling system.
6254 Note: Only the "catch" flavour of GDB 4.16 is handled here. The
6255 "catch NAME" is now no longer allowed in catch_command_1(). Also,
6256 there was no code in GDB 4.16 for "catch throw".
6258 Called from catch_exception_command_1 () */
6262 handle_gnu_4_16_catch_command (char *arg
, int tempflag
, int from_tty
)
6264 /* First, translate ARG into something we can deal with in terms
6267 struct symtabs_and_lines sals
;
6268 struct symtab_and_line sal
;
6269 register struct expression
*cond
= 0;
6270 register struct breakpoint
*b
;
6274 init_sal (&sal
); /* initialize to zeroes */
6276 /* If no arg given, or if first arg is 'if ', all active catch clauses
6277 are breakpointed. */
6279 if (!arg
|| (arg
[0] == 'i' && arg
[1] == 'f'
6280 && (arg
[2] == ' ' || arg
[2] == '\t')))
6282 /* Grab all active catch clauses. */
6283 sals
= get_catch_sals (0);
6287 /* Grab selected catch clauses. */
6288 error ("catch NAME not implemented");
6291 /* Not sure why this code has been disabled. I'm leaving
6292 it disabled. We can never come here now anyway
6293 since we don't allow the "catch NAME" syntax.
6296 /* This isn't used; I don't know what it was for. */
6297 sals
= map_catch_names (arg
, catch_breakpoint
);
6305 for (i
= 0; i
< sals
.nelts
; i
++)
6307 resolve_sal_pc (&sals
.sals
[i
]);
6311 if (arg
[0] == 'i' && arg
[1] == 'f'
6312 && (arg
[2] == ' ' || arg
[2] == '\t'))
6313 cond
= parse_exp_1 ((arg
+= 2, &arg
),
6314 block_for_pc (sals
.sals
[i
].pc
), 0);
6316 error ("Junk at end of arguments.");
6321 for (i
= 0; i
< sals
.nelts
; i
++)
6326 describe_other_breakpoints (sal
.pc
, sal
.section
);
6328 /* Important -- this is an ordinary breakpoint. For platforms
6329 with callback support for exceptions,
6330 create_exception_catchpoint() will create special bp types
6331 (bp_catch_catch and bp_catch_throw), and there is code in
6332 insert_breakpoints() and elsewhere that depends on that. */
6333 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6334 set_breakpoint_count (breakpoint_count
+ 1);
6335 b
->number
= breakpoint_count
;
6338 b
->enable_state
= bp_enabled
;
6339 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6346 warning ("Multiple breakpoints were set.");
6347 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
6353 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6356 /* The first argument may be an event name, such as "start" or "load".
6357 If so, then handle it as such. If it doesn't match an event name,
6358 then attempt to interpret it as an exception name. (This latter is
6359 the v4.16-and-earlier GDB meaning of the "catch" command.)
6361 First, try to find the bounds of what might be an event name. */
6362 char *arg1_start
= arg
;
6366 if (arg1_start
== NULL
)
6368 /* Old behaviour was to use pre-v-4.16 syntax */
6369 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6371 /* Now, this is not allowed */
6372 error ("Catch requires an event name.");
6375 arg1_end
= ep_find_event_name_end (arg1_start
);
6376 if (arg1_end
== NULL
)
6377 error ("catch requires an event");
6378 arg1_length
= arg1_end
+ 1 - arg1_start
;
6380 /* Try to match what we found against known event names. */
6381 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6383 error ("Catch of signal not yet implemented");
6385 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6387 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6388 tempflag
, from_tty
);
6390 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6392 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6393 tempflag
, from_tty
);
6395 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6397 error ("Catch of thread_start not yet implemented");
6399 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6401 error ("Catch of thread_exit not yet implemented");
6403 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6405 error ("Catch of thread_join not yet implemented");
6407 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6409 error ("Catch of start not yet implemented");
6411 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6413 error ("Catch of exit not yet implemented");
6415 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6417 #if defined(CHILD_INSERT_FORK_CATCHPOINT)
6418 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6420 error ("Catch of fork not yet implemented");
6423 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6425 #if defined(CHILD_INSERT_VFORK_CATCHPOINT)
6426 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6428 error ("Catch of vfork not yet implemented");
6431 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6433 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6434 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6436 error ("Catch of exec not yet implemented");
6439 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6441 #if defined(SOLIB_ADD)
6442 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6444 error ("Catch of load not implemented");
6447 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6449 #if defined(SOLIB_ADD)
6450 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6452 error ("Catch of load not implemented");
6455 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6457 error ("Catch of stop not yet implemented");
6460 /* This doesn't appear to be an event name */
6464 /* Pre-v.4.16 behaviour was to treat the argument
6465 as the name of an exception */
6466 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6467 /* Now this is not allowed */
6468 error ("Unknown event kind specified for catch");
6473 /* Used by the gui, could be made a worker for other things. */
6476 set_breakpoint_sal (struct symtab_and_line sal
)
6478 struct breakpoint
*b
;
6479 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6480 set_breakpoint_count (breakpoint_count
+ 1);
6481 b
->number
= breakpoint_count
;
6488 /* These aren't used; I don't know what they were for. */
6489 /* Disable breakpoints on all catch clauses described in ARGS. */
6491 disable_catch (char *args
)
6493 /* Map the disable command to catch clauses described in ARGS. */
6496 /* Enable breakpoints on all catch clauses described in ARGS. */
6498 enable_catch (char *args
)
6500 /* Map the disable command to catch clauses described in ARGS. */
6503 /* Delete breakpoints on all catch clauses in the active scope. */
6505 delete_catch (char *args
)
6507 /* Map the delete command to catch clauses described in ARGS. */
6512 catch_command (char *arg
, int from_tty
)
6514 catch_command_1 (arg
, 0, from_tty
);
6519 tcatch_command (char *arg
, int from_tty
)
6521 catch_command_1 (arg
, 1, from_tty
);
6524 /* Delete breakpoints by address or line. */
6527 clear_command (char *arg
, int from_tty
)
6529 struct breakpoint
*b
, *tmp
, *prev
, *found
;
6531 struct symtabs_and_lines sals
;
6532 struct symtab_and_line sal
;
6537 sals
= decode_line_spec (arg
, 1);
6542 sals
.sals
= (struct symtab_and_line
*)
6543 xmalloc (sizeof (struct symtab_and_line
));
6544 make_cleanup (xfree
, sals
.sals
);
6545 init_sal (&sal
); /* initialize to zeroes */
6546 sal
.line
= default_breakpoint_line
;
6547 sal
.symtab
= default_breakpoint_symtab
;
6548 sal
.pc
= default_breakpoint_address
;
6549 if (sal
.symtab
== 0)
6550 error ("No source file specified.");
6558 /* For each line spec given, delete bps which correspond
6559 to it. Do it in two passes, solely to preserve the current
6560 behavior that from_tty is forced true if we delete more than
6564 for (i
= 0; i
< sals
.nelts
; i
++)
6566 /* If exact pc given, clear bpts at that pc.
6567 If line given (pc == 0), clear all bpts on specified line.
6568 If defaulting, clear all bpts on default line
6571 defaulting sal.pc != 0 tests to do
6576 1 0 <can't happen> */
6581 /* Find all matching breakpoints, remove them from the
6582 breakpoint chain, and add them to the 'found' chain. */
6583 ALL_BREAKPOINTS_SAFE (b
, tmp
)
6585 /* Are we going to delete b? */
6586 if (b
->type
!= bp_none
6587 && b
->type
!= bp_watchpoint
6588 && b
->type
!= bp_hardware_watchpoint
6589 && b
->type
!= bp_read_watchpoint
6590 && b
->type
!= bp_access_watchpoint
6591 /* Not if b is a watchpoint of any sort... */
6592 && (((sal
.pc
&& (b
->address
== sal
.pc
))
6593 && (!section_is_overlay (b
->section
)
6594 || b
->section
== sal
.section
))
6595 /* Yes, if sal.pc matches b (modulo overlays). */
6596 || ((default_match
|| (0 == sal
.pc
))
6597 && b
->source_file
!= NULL
6598 && sal
.symtab
!= NULL
6599 && STREQ (b
->source_file
, sal
.symtab
->filename
)
6600 && b
->line_number
== sal
.line
)))
6601 /* Yes, if sal source file and line matches b. */
6603 /* Remove it from breakpoint_chain... */
6604 if (b
== breakpoint_chain
)
6606 /* b is at the head of the list */
6607 breakpoint_chain
= b
->next
;
6611 prev
->next
= b
->next
;
6613 /* And add it to 'found' chain. */
6619 /* Keep b, and keep a pointer to it. */
6624 /* Now go thru the 'found' chain and delete them. */
6628 error ("No breakpoint at %s.", arg
);
6630 error ("No breakpoint at this line.");
6634 from_tty
= 1; /* Always report if deleted more than one */
6636 printf_unfiltered ("Deleted breakpoint%s ", found
->next
? "s" : "");
6637 breakpoints_changed ();
6641 printf_unfiltered ("%d ", found
->number
);
6643 delete_breakpoint (found
);
6647 putchar_unfiltered ('\n');
6650 /* Delete breakpoint in BS if they are `delete' breakpoints and
6651 all breakpoints that are marked for deletion, whether hit or not.
6652 This is called after any breakpoint is hit, or after errors. */
6655 breakpoint_auto_delete (bpstat bs
)
6657 struct breakpoint
*b
, *temp
;
6659 for (; bs
; bs
= bs
->next
)
6660 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== disp_del
6662 delete_breakpoint (bs
->breakpoint_at
);
6664 ALL_BREAKPOINTS_SAFE (b
, temp
)
6666 if (b
->disposition
== disp_del_at_next_stop
)
6667 delete_breakpoint (b
);
6671 /* Delete a breakpoint and clean up all traces of it in the data
6675 delete_breakpoint (struct breakpoint
*bpt
)
6677 register struct breakpoint
*b
;
6681 error ("Internal error (attempted to delete a NULL breakpoint)");
6684 /* Has this bp already been deleted? This can happen because multiple
6685 lists can hold pointers to bp's. bpstat lists are especial culprits.
6687 One example of this happening is a watchpoint's scope bp. When the
6688 scope bp triggers, we notice that the watchpoint is out of scope, and
6689 delete it. We also delete its scope bp. But the scope bp is marked
6690 "auto-deleting", and is already on a bpstat. That bpstat is then
6691 checked for auto-deleting bp's, which are deleted.
6693 A real solution to this problem might involve reference counts in bp's,
6694 and/or giving them pointers back to their referencing bpstat's, and
6695 teaching delete_breakpoint to only free a bp's storage when no more
6696 references were extent. A cheaper bandaid was chosen. */
6697 if (bpt
->type
== bp_none
)
6700 if (delete_breakpoint_hook
)
6701 delete_breakpoint_hook (bpt
);
6702 breakpoint_delete_event (bpt
->number
);
6705 remove_breakpoint (bpt
, mark_inserted
);
6707 if (breakpoint_chain
== bpt
)
6708 breakpoint_chain
= bpt
->next
;
6710 /* If we have callback-style exception catchpoints, don't go through
6711 the adjustments to the C++ runtime library etc. if the inferior
6712 isn't actually running. target_enable_exception_callback for a
6713 null target ops vector gives an undesirable error message, so we
6714 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6715 exceptions are supported in this way, it's OK for now. FIXME */
6716 if (ep_is_exception_catchpoint (bpt
) && target_has_execution
)
6718 static char message1
[] = "Error in deleting catchpoint %d:\n";
6719 static char message
[sizeof (message1
) + 30];
6720 args_for_catchpoint_enable args
;
6722 /* Format possible error msg */
6723 sprintf (message
, message1
, bpt
->number
);
6724 args
.kind
= bpt
->type
== bp_catch_catch
?
6725 EX_EVENT_CATCH
: EX_EVENT_THROW
;
6727 catch_errors (cover_target_enable_exception_callback
, &args
,
6728 message
, RETURN_MASK_ALL
);
6735 b
->next
= bpt
->next
;
6739 check_duplicates (bpt
);
6740 /* If this breakpoint was inserted, and there is another breakpoint
6741 at the same address, we need to insert the other breakpoint. */
6743 && bpt
->type
!= bp_hardware_watchpoint
6744 && bpt
->type
!= bp_read_watchpoint
6745 && bpt
->type
!= bp_access_watchpoint
6746 && bpt
->type
!= bp_catch_fork
6747 && bpt
->type
!= bp_catch_vfork
6748 && bpt
->type
!= bp_catch_exec
)
6751 if (b
->address
== bpt
->address
6752 && b
->section
== bpt
->section
6754 && b
->enable_state
!= bp_disabled
6755 && b
->enable_state
!= bp_shlib_disabled
6756 && b
->enable_state
!= bp_call_disabled
)
6760 /* We should never reach this point if there is a permanent
6761 breakpoint at the same address as the one being deleted.
6762 If there is a permanent breakpoint somewhere, it should
6763 always be the only one inserted. */
6764 if (b
->enable_state
== bp_permanent
)
6765 internal_error (__FILE__
, __LINE__
,
6766 "another breakpoint was inserted on top of "
6767 "a permanent breakpoint");
6769 if (b
->type
== bp_hardware_breakpoint
)
6770 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
6772 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
6774 /* If there was an error in the insert, print a message, then stop execution. */
6777 struct ui_file
*tmp_error_stream
= mem_fileopen ();
6778 make_cleanup_ui_file_delete (tmp_error_stream
);
6781 if (b
->type
== bp_hardware_breakpoint
)
6783 fprintf_unfiltered (tmp_error_stream
,
6784 "Cannot insert hardware breakpoint %d.\n"
6785 "You may have requested too many hardware breakpoints.\n",
6790 fprintf_unfiltered (tmp_error_stream
, "Cannot insert breakpoint %d.\n", b
->number
);
6791 fprintf_filtered (tmp_error_stream
, "Error accessing memory address ");
6792 print_address_numeric (b
->address
, 1, tmp_error_stream
);
6793 fprintf_filtered (tmp_error_stream
, ": %s.\n",
6794 safe_strerror (val
));
6797 fprintf_unfiltered (tmp_error_stream
,"The same program may be running in another process.");
6798 target_terminal_ours_for_output ();
6799 error_stream(tmp_error_stream
);
6806 free_command_lines (&bpt
->commands
);
6809 if (bpt
->cond_string
!= NULL
)
6810 xfree (bpt
->cond_string
);
6811 if (bpt
->addr_string
!= NULL
)
6812 xfree (bpt
->addr_string
);
6813 if (bpt
->exp
!= NULL
)
6815 if (bpt
->exp_string
!= NULL
)
6816 xfree (bpt
->exp_string
);
6817 if (bpt
->val
!= NULL
)
6818 value_free (bpt
->val
);
6819 if (bpt
->source_file
!= NULL
)
6820 xfree (bpt
->source_file
);
6821 if (bpt
->dll_pathname
!= NULL
)
6822 xfree (bpt
->dll_pathname
);
6823 if (bpt
->triggered_dll_pathname
!= NULL
)
6824 xfree (bpt
->triggered_dll_pathname
);
6825 if (bpt
->exec_pathname
!= NULL
)
6826 xfree (bpt
->exec_pathname
);
6828 /* Be sure no bpstat's are pointing at it after it's been freed. */
6829 /* FIXME, how can we find all bpstat's?
6830 We just check stop_bpstat for now. */
6831 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
6832 if (bs
->breakpoint_at
== bpt
)
6834 bs
->breakpoint_at
= NULL
;
6836 /* bs->commands will be freed later. */
6838 /* On the chance that someone will soon try again to delete this same
6839 bp, we mark it as deleted before freeing its storage. */
6840 bpt
->type
= bp_none
;
6846 do_delete_breakpoint_cleanup (void *b
)
6848 delete_breakpoint (b
);
6852 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
6854 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
6858 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
6860 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
6864 delete_command (char *arg
, int from_tty
)
6866 struct breakpoint
*b
, *temp
;
6872 int breaks_to_delete
= 0;
6874 /* Delete all breakpoints if no argument.
6875 Do not delete internal or call-dummy breakpoints, these
6876 have to be deleted with an explicit breakpoint number argument. */
6879 if (b
->type
!= bp_call_dummy
&&
6880 b
->type
!= bp_shlib_event
&&
6881 b
->type
!= bp_thread_event
&&
6882 b
->type
!= bp_overlay_event
&&
6884 breaks_to_delete
= 1;
6887 /* Ask user only if there are some breakpoints to delete. */
6889 || (breaks_to_delete
&& query ("Delete all breakpoints? ")))
6891 ALL_BREAKPOINTS_SAFE (b
, temp
)
6893 if (b
->type
!= bp_call_dummy
&&
6894 b
->type
!= bp_shlib_event
&&
6895 b
->type
!= bp_thread_event
&&
6896 b
->type
!= bp_overlay_event
&&
6898 delete_breakpoint (b
);
6903 map_breakpoint_numbers (arg
, delete_breakpoint
);
6906 /* Reset a breakpoint given it's struct breakpoint * BINT.
6907 The value we return ends up being the return value from catch_errors.
6908 Unused in this case. */
6911 breakpoint_re_set_one (PTR bint
)
6913 /* get past catch_errs */
6914 struct breakpoint
*b
= (struct breakpoint
*) bint
;
6917 struct symtabs_and_lines sals
;
6919 enum enable_state save_enable
;
6924 warning ("attempted to reset apparently deleted breakpoint #%d?",
6928 case bp_hardware_breakpoint
:
6930 case bp_catch_unload
:
6931 if (b
->addr_string
== NULL
)
6933 /* Anything without a string can't be re-set. */
6934 delete_breakpoint (b
);
6937 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
6939 ``And a hack it is, although Apple's Darwin version of GDB
6940 contains an almost identical hack to implement a "future
6941 break" command. It seems to work in many real world cases,
6942 but it is easy to come up with a test case where the patch
6943 doesn't help at all.''
6945 ``It seems that the way GDB implements breakpoints - in -
6946 shared - libraries was designed for a.out shared library
6947 systems (SunOS 4) where shared libraries were loaded at a
6948 fixed address in memory. Since ELF shared libraries can (and
6949 will) be loaded at any address in memory, things break.
6950 Fixing this is not trivial. Therefore, I'm not sure whether
6951 we should add this hack to the branch only. I cannot
6952 guarantee that things will be fixed on the trunk in the near
6955 In case we have a problem, disable this breakpoint. We'll
6956 restore its status if we succeed. Don't disable a
6957 shlib_disabled breakpoint though. There's a fair chance we
6958 can't re-set it if the shared library it's in hasn't been
6960 save_enable
= b
->enable_state
;
6961 if (b
->enable_state
!= bp_shlib_disabled
)
6962 b
->enable_state
= bp_disabled
;
6964 set_language (b
->language
);
6965 input_radix
= b
->input_radix
;
6967 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
);
6968 for (i
= 0; i
< sals
.nelts
; i
++)
6970 resolve_sal_pc (&sals
.sals
[i
]);
6972 /* Reparse conditions, they might contain references to the
6974 if (b
->cond_string
!= NULL
)
6979 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
6982 /* We need to re-set the breakpoint if the address changes... */
6983 if (b
->address
!= sals
.sals
[i
].pc
6984 /* ...or new and old breakpoints both have source files, and
6985 the source file name or the line number changes... */
6986 || (b
->source_file
!= NULL
6987 && sals
.sals
[i
].symtab
!= NULL
6988 && (!STREQ (b
->source_file
, sals
.sals
[i
].symtab
->filename
)
6989 || b
->line_number
!= sals
.sals
[i
].line
)
6991 /* ...or we switch between having a source file and not having
6993 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
6996 if (b
->source_file
!= NULL
)
6997 xfree (b
->source_file
);
6998 if (sals
.sals
[i
].symtab
== NULL
)
6999 b
->source_file
= NULL
;
7002 savestring (sals
.sals
[i
].symtab
->filename
,
7003 strlen (sals
.sals
[i
].symtab
->filename
));
7004 b
->line_number
= sals
.sals
[i
].line
;
7005 b
->address
= sals
.sals
[i
].pc
;
7007 /* Used to check for duplicates here, but that can
7008 cause trouble, as it doesn't check for disabled
7013 /* Might be better to do this just once per breakpoint_re_set,
7014 rather than once for every breakpoint. */
7015 breakpoints_changed ();
7017 b
->section
= sals
.sals
[i
].section
;
7018 b
->enable_state
= save_enable
; /* Restore it, this worked. */
7021 /* Now that this is re-enabled, check_duplicates
7023 check_duplicates (b
);
7030 case bp_hardware_watchpoint
:
7031 case bp_read_watchpoint
:
7032 case bp_access_watchpoint
:
7033 innermost_block
= NULL
;
7034 /* The issue arises of what context to evaluate this in. The
7035 same one as when it was set, but what does that mean when
7036 symbols have been re-read? We could save the filename and
7037 functionname, but if the context is more local than that, the
7038 best we could do would be something like how many levels deep
7039 and which index at that particular level, but that's going to
7040 be less stable than filenames or function names. */
7042 /* So for now, just use a global context. */
7045 b
->exp
= parse_expression (b
->exp_string
);
7046 b
->exp_valid_block
= innermost_block
;
7047 mark
= value_mark ();
7049 value_free (b
->val
);
7050 b
->val
= evaluate_expression (b
->exp
);
7051 release_value (b
->val
);
7052 if (VALUE_LAZY (b
->val
))
7053 value_fetch_lazy (b
->val
);
7055 if (b
->cond_string
!= NULL
)
7060 b
->cond
= parse_exp_1 (&s
, (struct block
*) 0, 0);
7062 if (b
->enable_state
== bp_enabled
)
7064 value_free_to_mark (mark
);
7066 case bp_catch_catch
:
7067 case bp_catch_throw
:
7069 /* We needn't really do anything to reset these, since the mask
7070 that requests them is unaffected by e.g., new libraries being
7073 case bp_catch_vfork
:
7078 printf_filtered ("Deleting unknown breakpoint type %d\n", b
->type
);
7080 /* Delete longjmp and overlay event breakpoints; they will be
7081 reset later by breakpoint_re_set. */
7083 case bp_longjmp_resume
:
7084 case bp_overlay_event
:
7085 delete_breakpoint (b
);
7088 /* This breakpoint is special, it's set up when the inferior
7089 starts and we really don't want to touch it. */
7090 case bp_shlib_event
:
7092 /* Like bp_shlib_event, this breakpoint type is special.
7093 Once it is set up, we do not want to touch it. */
7094 case bp_thread_event
:
7096 /* Keep temporary breakpoints, which can be encountered when we step
7097 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7098 Otherwise these should have been blown away via the cleanup chain
7099 or by breakpoint_init_inferior when we rerun the executable. */
7102 case bp_watchpoint_scope
:
7104 case bp_step_resume
:
7111 /* Re-set all breakpoints after symbols have been re-loaded. */
7113 breakpoint_re_set (void)
7115 struct breakpoint
*b
, *temp
;
7116 enum language save_language
;
7117 int save_input_radix
;
7118 static char message1
[] = "Error in re-setting breakpoint %d:\n";
7119 char message
[sizeof (message1
) + 30 /* slop */ ];
7121 save_language
= current_language
->la_language
;
7122 save_input_radix
= input_radix
;
7123 ALL_BREAKPOINTS_SAFE (b
, temp
)
7125 /* Format possible error msg */
7126 sprintf (message
, message1
, b
->number
);
7127 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7129 set_language (save_language
);
7130 input_radix
= save_input_radix
;
7132 if (GET_LONGJMP_TARGET_P ())
7134 create_longjmp_breakpoint ("longjmp");
7135 create_longjmp_breakpoint ("_longjmp");
7136 create_longjmp_breakpoint ("siglongjmp");
7137 create_longjmp_breakpoint ("_siglongjmp");
7138 create_longjmp_breakpoint (NULL
);
7141 create_overlay_event_breakpoint ("_ovly_debug_event");
7144 /* Reset the thread number of this breakpoint:
7146 - If the breakpoint is for all threads, leave it as-is.
7147 - Else, reset it to the current thread for inferior_ptid. */
7149 breakpoint_re_set_thread (struct breakpoint
*b
)
7151 if (b
->thread
!= -1)
7153 if (in_thread_list (inferior_ptid
))
7154 b
->thread
= pid_to_thread_id (inferior_ptid
);
7158 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7159 If from_tty is nonzero, it prints a message to that effect,
7160 which ends with a period (no newline). */
7163 set_ignore_count (int bptnum
, int count
, int from_tty
)
7165 register struct breakpoint
*b
;
7171 if (b
->number
== bptnum
)
7173 b
->ignore_count
= count
;
7177 printf_filtered ("Will stop next time breakpoint %d is reached.",
7179 else if (count
== 1)
7180 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7183 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7186 breakpoints_changed ();
7187 breakpoint_modify_event (b
->number
);
7191 error ("No breakpoint number %d.", bptnum
);
7194 /* Clear the ignore counts of all breakpoints. */
7196 breakpoint_clear_ignore_counts (void)
7198 struct breakpoint
*b
;
7201 b
->ignore_count
= 0;
7204 /* Command to set ignore-count of breakpoint N to COUNT. */
7207 ignore_command (char *args
, int from_tty
)
7213 error_no_arg ("a breakpoint number");
7215 num
= get_number (&p
);
7217 error ("bad breakpoint number: '%s'", args
);
7219 error ("Second argument (specified ignore-count) is missing.");
7221 set_ignore_count (num
,
7222 longest_to_int (value_as_long (parse_and_eval (p
))),
7225 printf_filtered ("\n");
7228 /* Call FUNCTION on each of the breakpoints
7229 whose numbers are given in ARGS. */
7232 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7234 register char *p
= args
;
7237 register struct breakpoint
*b
, *tmp
;
7241 error_no_arg ("one or more breakpoint numbers");
7248 num
= get_number_or_range (&p1
);
7251 warning ("bad breakpoint number at or near '%s'", p
);
7255 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7256 if (b
->number
== num
)
7258 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7261 if (related_breakpoint
)
7262 function (related_breakpoint
);
7266 printf_unfiltered ("No breakpoint number %d.\n", num
);
7272 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7273 If from_tty is nonzero, it prints a message to that effect,
7274 which ends with a period (no newline). */
7277 disable_breakpoint (struct breakpoint
*bpt
)
7279 /* Never disable a watchpoint scope breakpoint; we want to
7280 hit them when we leave scope so we can delete both the
7281 watchpoint and its scope breakpoint at that time. */
7282 if (bpt
->type
== bp_watchpoint_scope
)
7285 /* You can't disable permanent breakpoints. */
7286 if (bpt
->enable_state
== bp_permanent
)
7289 bpt
->enable_state
= bp_disabled
;
7291 check_duplicates (bpt
);
7293 if (modify_breakpoint_hook
)
7294 modify_breakpoint_hook (bpt
);
7295 breakpoint_modify_event (bpt
->number
);
7300 disable_command (char *args
, int from_tty
)
7302 register struct breakpoint
*bpt
;
7304 ALL_BREAKPOINTS (bpt
)
7308 warning ("attempted to disable apparently deleted breakpoint #%d?",
7313 case bp_catch_unload
:
7315 case bp_catch_vfork
:
7317 case bp_catch_catch
:
7318 case bp_catch_throw
:
7319 case bp_hardware_breakpoint
:
7321 case bp_hardware_watchpoint
:
7322 case bp_read_watchpoint
:
7323 case bp_access_watchpoint
:
7324 disable_breakpoint (bpt
);
7329 map_breakpoint_numbers (args
, disable_breakpoint
);
7333 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7335 struct frame_info
*save_selected_frame
= NULL
;
7336 int save_selected_frame_level
= -1;
7337 int target_resources_ok
, other_type_used
;
7340 if (bpt
->type
== bp_hardware_breakpoint
)
7343 i
= hw_breakpoint_used_count ();
7344 target_resources_ok
=
7345 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7347 if (target_resources_ok
== 0)
7348 error ("No hardware breakpoint support in the target.");
7349 else if (target_resources_ok
< 0)
7350 error ("Hardware breakpoints used exceeds limit.");
7353 if (bpt
->enable_state
!= bp_permanent
)
7354 bpt
->enable_state
= bp_enabled
;
7355 bpt
->disposition
= disposition
;
7356 check_duplicates (bpt
);
7357 breakpoints_changed ();
7359 if (bpt
->type
== bp_watchpoint
||
7360 bpt
->type
== bp_hardware_watchpoint
||
7361 bpt
->type
== bp_read_watchpoint
||
7362 bpt
->type
== bp_access_watchpoint
)
7364 if (bpt
->exp_valid_block
!= NULL
)
7366 struct frame_info
*fr
=
7367 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7371 Cannot enable watchpoint %d because the block in which its expression\n\
7372 is valid is not currently in scope.\n", bpt
->number
);
7373 bpt
->enable_state
= bp_disabled
;
7377 save_selected_frame
= deprecated_selected_frame
;
7378 save_selected_frame_level
= frame_relative_level (deprecated_selected_frame
);
7382 value_free (bpt
->val
);
7383 mark
= value_mark ();
7384 bpt
->val
= evaluate_expression (bpt
->exp
);
7385 release_value (bpt
->val
);
7386 if (VALUE_LAZY (bpt
->val
))
7387 value_fetch_lazy (bpt
->val
);
7389 if (bpt
->type
== bp_hardware_watchpoint
||
7390 bpt
->type
== bp_read_watchpoint
||
7391 bpt
->type
== bp_access_watchpoint
)
7393 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7394 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7396 /* Hack around 'unused var' error for some targets here */
7398 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7399 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7400 /* we can consider of type is bp_hardware_watchpoint, convert to
7401 bp_watchpoint in the following condition */
7402 if (target_resources_ok
< 0)
7405 Cannot enable watchpoint %d because target watch resources\n\
7406 have been allocated for other watchpoints.\n", bpt
->number
);
7407 bpt
->enable_state
= bp_disabled
;
7408 value_free_to_mark (mark
);
7413 if (save_selected_frame_level
>= 0)
7414 select_frame (save_selected_frame
);
7415 value_free_to_mark (mark
);
7417 if (modify_breakpoint_hook
)
7418 modify_breakpoint_hook (bpt
);
7419 breakpoint_modify_event (bpt
->number
);
7423 enable_breakpoint (struct breakpoint
*bpt
)
7425 do_enable_breakpoint (bpt
, bpt
->disposition
);
7428 /* The enable command enables the specified breakpoints (or all defined
7429 breakpoints) so they once again become (or continue to be) effective
7430 in stopping the inferior. */
7434 enable_command (char *args
, int from_tty
)
7436 register struct breakpoint
*bpt
;
7438 ALL_BREAKPOINTS (bpt
)
7442 warning ("attempted to enable apparently deleted breakpoint #%d?",
7447 case bp_catch_unload
:
7449 case bp_catch_vfork
:
7451 case bp_catch_catch
:
7452 case bp_catch_throw
:
7453 case bp_hardware_breakpoint
:
7455 case bp_hardware_watchpoint
:
7456 case bp_read_watchpoint
:
7457 case bp_access_watchpoint
:
7458 enable_breakpoint (bpt
);
7463 map_breakpoint_numbers (args
, enable_breakpoint
);
7467 enable_once_breakpoint (struct breakpoint
*bpt
)
7469 do_enable_breakpoint (bpt
, disp_disable
);
7474 enable_once_command (char *args
, int from_tty
)
7476 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7480 enable_delete_breakpoint (struct breakpoint
*bpt
)
7482 do_enable_breakpoint (bpt
, disp_del
);
7487 enable_delete_command (char *args
, int from_tty
)
7489 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7492 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7494 struct symtabs_and_lines
7495 decode_line_spec_1 (char *string
, int funfirstline
)
7497 struct symtabs_and_lines sals
;
7499 error ("Empty line specification.");
7500 if (default_breakpoint_valid
)
7501 sals
= decode_line_1 (&string
, funfirstline
,
7502 default_breakpoint_symtab
,
7503 default_breakpoint_line
,
7506 sals
= decode_line_1 (&string
, funfirstline
,
7507 (struct symtab
*) NULL
, 0, (char ***) NULL
);
7509 error ("Junk at end of line specification: %s", string
);
7514 _initialize_breakpoint (void)
7516 struct cmd_list_element
*c
;
7518 breakpoint_chain
= 0;
7519 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7520 before a breakpoint is set. */
7521 breakpoint_count
= 0;
7523 add_com ("ignore", class_breakpoint
, ignore_command
,
7524 "Set ignore-count of breakpoint number N to COUNT.\n\
7525 Usage is `ignore N COUNT'.");
7527 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
7529 add_com ("commands", class_breakpoint
, commands_command
,
7530 "Set commands to be executed when a breakpoint is hit.\n\
7531 Give breakpoint number as argument after \"commands\".\n\
7532 With no argument, the targeted breakpoint is the last one set.\n\
7533 The commands themselves follow starting on the next line.\n\
7534 Type a line containing \"end\" to indicate the end of them.\n\
7535 Give \"silent\" as the first line to make the breakpoint silent;\n\
7536 then no output is printed when it is hit, except what the commands print.");
7538 add_com ("condition", class_breakpoint
, condition_command
,
7539 "Specify breakpoint number N to break only if COND is true.\n\
7540 Usage is `condition N COND', where N is an integer and COND is an\n\
7541 expression to be evaluated whenever breakpoint N is reached.");
7543 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
,
7544 "Set a temporary breakpoint. Args like \"break\" command.\n\
7545 Like \"break\" except the breakpoint is only temporary,\n\
7546 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7547 by using \"enable delete\" on the breakpoint number.");
7548 set_cmd_completer (c
, location_completer
);
7550 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
,
7551 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7552 Like \"break\" except the breakpoint requires hardware support,\n\
7553 some target hardware may not have this support.");
7554 set_cmd_completer (c
, location_completer
);
7556 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
,
7557 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7558 Like \"hbreak\" except the breakpoint is only temporary,\n\
7559 so it will be deleted when hit.");
7560 set_cmd_completer (c
, location_completer
);
7562 add_prefix_cmd ("enable", class_breakpoint
, enable_command
,
7563 "Enable some breakpoints.\n\
7564 Give breakpoint numbers (separated by spaces) as arguments.\n\
7565 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7566 This is used to cancel the effect of the \"disable\" command.\n\
7567 With a subcommand you can enable temporarily.",
7568 &enablelist
, "enable ", 1, &cmdlist
);
7570 add_com ("ab", class_breakpoint
, enable_command
,
7571 "Enable some breakpoints.\n\
7572 Give breakpoint numbers (separated by spaces) as arguments.\n\
7573 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7574 This is used to cancel the effect of the \"disable\" command.\n\
7575 With a subcommand you can enable temporarily.");
7577 add_com_alias ("en", "enable", class_breakpoint
, 1);
7579 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
,
7580 "Enable some breakpoints.\n\
7581 Give breakpoint numbers (separated by spaces) as arguments.\n\
7582 This is used to cancel the effect of the \"disable\" command.\n\
7583 May be abbreviated to simply \"enable\".\n",
7584 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
7586 add_cmd ("once", no_class
, enable_once_command
,
7587 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7588 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7591 add_cmd ("delete", no_class
, enable_delete_command
,
7592 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7593 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7596 add_cmd ("delete", no_class
, enable_delete_command
,
7597 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7598 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7601 add_cmd ("once", no_class
, enable_once_command
,
7602 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7603 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7606 add_prefix_cmd ("disable", class_breakpoint
, disable_command
,
7607 "Disable some breakpoints.\n\
7608 Arguments are breakpoint numbers with spaces in between.\n\
7609 To disable all breakpoints, give no argument.\n\
7610 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7611 &disablelist
, "disable ", 1, &cmdlist
);
7612 add_com_alias ("dis", "disable", class_breakpoint
, 1);
7613 add_com_alias ("disa", "disable", class_breakpoint
, 1);
7615 add_com ("sb", class_breakpoint
, disable_command
,
7616 "Disable some breakpoints.\n\
7617 Arguments are breakpoint numbers with spaces in between.\n\
7618 To disable all breakpoints, give no argument.\n\
7619 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7621 add_cmd ("breakpoints", class_alias
, disable_command
,
7622 "Disable some breakpoints.\n\
7623 Arguments are breakpoint numbers with spaces in between.\n\
7624 To disable all breakpoints, give no argument.\n\
7625 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7626 This command may be abbreviated \"disable\".",
7629 add_prefix_cmd ("delete", class_breakpoint
, delete_command
,
7630 "Delete some breakpoints or auto-display expressions.\n\
7631 Arguments are breakpoint numbers with spaces in between.\n\
7632 To delete all breakpoints, give no argument.\n\
7634 Also a prefix command for deletion of other GDB objects.\n\
7635 The \"unset\" command is also an alias for \"delete\".",
7636 &deletelist
, "delete ", 1, &cmdlist
);
7637 add_com_alias ("d", "delete", class_breakpoint
, 1);
7639 add_com ("db", class_breakpoint
, delete_command
,
7640 "Delete some breakpoints.\n\
7641 Arguments are breakpoint numbers with spaces in between.\n\
7642 To delete all breakpoints, give no argument.\n");
7644 add_cmd ("breakpoints", class_alias
, delete_command
,
7645 "Delete some breakpoints or auto-display expressions.\n\
7646 Arguments are breakpoint numbers with spaces in between.\n\
7647 To delete all breakpoints, give no argument.\n\
7648 This command may be abbreviated \"delete\".",
7651 add_com ("clear", class_breakpoint
, clear_command
,
7652 concat ("Clear breakpoint at specified line or function.\n\
7653 Argument may be line number, function name, or \"*\" and an address.\n\
7654 If line number is specified, all breakpoints in that line are cleared.\n\
7655 If function is specified, breakpoints at beginning of function are cleared.\n\
7656 If an address is specified, breakpoints at that address are cleared.\n\n",
7657 "With no argument, clears all breakpoints in the line that the selected frame\n\
7660 See also the \"delete\" command which clears breakpoints by number.", NULL
));
7662 c
= add_com ("break", class_breakpoint
, break_command
,
7663 concat ("Set breakpoint at specified line or function.\n\
7664 Argument may be line number, function name, or \"*\" and an address.\n\
7665 If line number is specified, break at start of code for that line.\n\
7666 If function is specified, break at start of code for that function.\n\
7667 If an address is specified, break at that exact address.\n",
7668 "With no arg, uses current execution address of selected stack frame.\n\
7669 This is useful for breaking on return to a stack frame.\n\
7671 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7673 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL
));
7674 set_cmd_completer (c
, location_completer
);
7676 add_com_alias ("b", "break", class_run
, 1);
7677 add_com_alias ("br", "break", class_run
, 1);
7678 add_com_alias ("bre", "break", class_run
, 1);
7679 add_com_alias ("brea", "break", class_run
, 1);
7683 add_com_alias ("ba", "break", class_breakpoint
, 1);
7684 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
7689 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
,
7690 "Break in function/address or break at a line in the current file.",
7691 &stoplist
, "stop ", 1, &cmdlist
);
7692 add_cmd ("in", class_breakpoint
, stopin_command
,
7693 "Break in function or address.\n", &stoplist
);
7694 add_cmd ("at", class_breakpoint
, stopat_command
,
7695 "Break at a line in the current file.\n", &stoplist
);
7696 add_com ("status", class_info
, breakpoints_info
,
7697 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7698 The \"Type\" column indicates one of:\n\
7699 \tbreakpoint - normal breakpoint\n\
7700 \twatchpoint - watchpoint\n\
7701 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7702 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7703 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7704 address and file/line number respectively.\n\n",
7705 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7706 are set to the address of the last breakpoint listed.\n\n\
7707 Convenience variable \"$bpnum\" contains the number of the last\n\
7708 breakpoint set.", NULL
));
7711 add_info ("breakpoints", breakpoints_info
,
7712 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7713 The \"Type\" column indicates one of:\n\
7714 \tbreakpoint - normal breakpoint\n\
7715 \twatchpoint - watchpoint\n\
7716 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7717 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7718 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7719 address and file/line number respectively.\n\n",
7720 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7721 are set to the address of the last breakpoint listed.\n\n\
7722 Convenience variable \"$bpnum\" contains the number of the last\n\
7723 breakpoint set.", NULL
));
7726 add_com ("lb", class_breakpoint
, breakpoints_info
,
7727 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7728 The \"Type\" column indicates one of:\n\
7729 \tbreakpoint - normal breakpoint\n\
7730 \twatchpoint - watchpoint\n\
7731 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7732 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7733 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7734 address and file/line number respectively.\n\n",
7735 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7736 are set to the address of the last breakpoint listed.\n\n\
7737 Convenience variable \"$bpnum\" contains the number of the last\n\
7738 breakpoint set.", NULL
));
7740 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
,
7741 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7742 The \"Type\" column indicates one of:\n\
7743 \tbreakpoint - normal breakpoint\n\
7744 \twatchpoint - watchpoint\n\
7745 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7746 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7747 \tuntil - internal breakpoint used by the \"until\" command\n\
7748 \tfinish - internal breakpoint used by the \"finish\" command\n",
7749 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7750 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7751 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7752 address and file/line number respectively.\n\n",
7753 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7754 are set to the address of the last breakpoint listed.\n\n\
7755 Convenience variable \"$bpnum\" contains the number of the last\n\
7756 breakpoint set.", NULL
),
7757 &maintenanceinfolist
);
7759 add_com ("catch", class_breakpoint
, catch_command
,
7760 "Set catchpoints to catch events.\n\
7761 Raised signals may be caught:\n\
7762 \tcatch signal - all signals\n\
7763 \tcatch signal <signame> - a particular signal\n\
7764 Raised exceptions may be caught:\n\
7765 \tcatch throw - all exceptions, when thrown\n\
7766 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7767 \tcatch catch - all exceptions, when caught\n\
7768 \tcatch catch <exceptname> - a particular exception, when caught\n\
7769 Thread or process events may be caught:\n\
7770 \tcatch thread_start - any threads, just after creation\n\
7771 \tcatch thread_exit - any threads, just before expiration\n\
7772 \tcatch thread_join - any threads, just after joins\n\
7773 Process events may be caught:\n\
7774 \tcatch start - any processes, just after creation\n\
7775 \tcatch exit - any processes, just before expiration\n\
7776 \tcatch fork - calls to fork()\n\
7777 \tcatch vfork - calls to vfork()\n\
7778 \tcatch exec - calls to exec()\n\
7779 Dynamically-linked library events may be caught:\n\
7780 \tcatch load - loads of any library\n\
7781 \tcatch load <libname> - loads of a particular library\n\
7782 \tcatch unload - unloads of any library\n\
7783 \tcatch unload <libname> - unloads of a particular library\n\
7784 The act of your program's execution stopping may also be caught:\n\
7786 C++ exceptions may be caught:\n\
7787 \tcatch throw - all exceptions, when thrown\n\
7788 \tcatch catch - all exceptions, when caught\n\
7790 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7791 after a fork or vfork is caught.\n\n\
7792 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7794 add_com ("tcatch", class_breakpoint
, tcatch_command
,
7795 "Set temporary catchpoints to catch events.\n\
7796 Args like \"catch\" command.\n\
7797 Like \"catch\" except the catchpoint is only temporary,\n\
7798 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7799 by using \"enable delete\" on the catchpoint number.");
7801 c
= add_com ("watch", class_breakpoint
, watch_command
,
7802 "Set a watchpoint for an expression.\n\
7803 A watchpoint stops execution of your program whenever the value of\n\
7804 an expression changes.");
7805 set_cmd_completer (c
, location_completer
);
7807 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
,
7808 "Set a read watchpoint for an expression.\n\
7809 A watchpoint stops execution of your program whenever the value of\n\
7810 an expression is read.");
7811 set_cmd_completer (c
, location_completer
);
7813 c
= add_com ("awatch", class_breakpoint
, awatch_command
,
7814 "Set a watchpoint for an expression.\n\
7815 A watchpoint stops execution of your program whenever the value of\n\
7816 an expression is either read or written.");
7817 set_cmd_completer (c
, location_completer
);
7819 add_info ("watchpoints", breakpoints_info
,
7820 "Synonym for ``info breakpoints''.");
7823 c
= add_set_cmd ("can-use-hw-watchpoints", class_support
, var_zinteger
,
7824 (char *) &can_use_hw_watchpoints
,
7825 "Set debugger's willingness to use watchpoint hardware.\n\
7826 If zero, gdb will not use hardware for new watchpoints, even if\n\
7827 such is available. (However, any hardware watchpoints that were\n\
7828 created before setting this to nonzero, will continue to use watchpoint\n\
7831 add_show_from_set (c
, &showlist
);
7833 can_use_hw_watchpoints
= 1;