1 /* Everything about breakpoints, for GDB.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 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 /* Permanent breakpoints cannot be inserted or removed. Disabled
739 breakpoints should not be inserted. */
740 if (b
->enable_state
!= bp_enabled
)
743 if ((b
->type
== bp_watchpoint
744 || b
->type
== bp_hardware_watchpoint
745 || b
->type
== bp_read_watchpoint
746 || b
->type
== bp_access_watchpoint
) && (!b
->val
))
749 val
= evaluate_expression (b
->exp
);
751 if (VALUE_LAZY (val
))
752 value_fetch_lazy (val
);
755 if (b
->type
!= bp_watchpoint
756 && b
->type
!= bp_hardware_watchpoint
757 && b
->type
!= bp_read_watchpoint
758 && b
->type
!= bp_access_watchpoint
759 && b
->type
!= bp_catch_fork
760 && b
->type
!= bp_catch_vfork
761 && b
->type
!= bp_catch_exec
762 && b
->type
!= bp_catch_throw
763 && b
->type
!= bp_catch_catch
767 /* "Normal" instruction breakpoint: either the standard
768 trap-instruction bp (bp_breakpoint), or a
769 bp_hardware_breakpoint. */
771 /* First check to see if we have to handle an overlay. */
772 if (overlay_debugging
== ovly_off
773 || b
->section
== NULL
774 || !(section_is_overlay (b
->section
)))
776 /* No overlay handling: just set the breakpoint. */
778 if (b
->type
== bp_hardware_breakpoint
)
779 val
= target_insert_hw_breakpoint (b
->address
,
782 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
786 /* This breakpoint is in an overlay section.
787 Shall we set a breakpoint at the LMA? */
788 if (!overlay_events_enabled
)
790 /* Yes -- overlay event support is not active,
791 so we must try to set a breakpoint at the LMA.
792 This will not work for a hardware breakpoint. */
793 if (b
->type
== bp_hardware_breakpoint
)
794 warning ("hardware breakpoint %d not supported in overlay!\n",
798 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
800 /* Set a software (trap) breakpoint at the LMA. */
801 val
= target_insert_breakpoint (addr
, b
->shadow_contents
);
803 fprintf_unfiltered (tmp_error_stream
,
804 "Overlay breakpoint %d failed: in ROM?",
808 /* Shall we set a breakpoint at the VMA? */
809 if (section_is_mapped (b
->section
))
811 /* Yes. This overlay section is mapped into memory. */
812 if (b
->type
== bp_hardware_breakpoint
)
813 val
= target_insert_hw_breakpoint (b
->address
,
816 val
= target_insert_breakpoint (b
->address
,
821 /* No. This breakpoint will not be inserted.
822 No error, but do not mark the bp as 'inserted'. */
829 /* Can't set the breakpoint. */
830 #if defined (DISABLE_UNSETTABLE_BREAK)
831 if (DISABLE_UNSETTABLE_BREAK (b
->address
))
833 /* See also: disable_breakpoints_in_shlibs. */
835 b
->enable_state
= bp_shlib_disabled
;
836 if (!disabled_breaks
)
838 fprintf_unfiltered (tmp_error_stream
,
839 "Cannot insert breakpoint %d.\n",
841 fprintf_unfiltered (tmp_error_stream
,
842 "Temporarily disabling shared library breakpoints:\n");
845 fprintf_unfiltered (tmp_error_stream
,
846 "breakpoint #%d\n", b
->number
);
851 #ifdef ONE_PROCESS_WRITETEXT
854 if (b
->type
== bp_hardware_breakpoint
)
856 hw_breakpoint_error
= 1;
857 fprintf_unfiltered (tmp_error_stream
,
858 "Cannot insert hardware breakpoint %d.\n",
863 fprintf_unfiltered (tmp_error_stream
,
864 "Cannot insert breakpoint %d.\n",
866 fprintf_filtered (tmp_error_stream
,
867 "Error accessing memory address ");
868 print_address_numeric (b
->address
, 1, tmp_error_stream
);
869 fprintf_filtered (tmp_error_stream
, ": %s.\n",
870 safe_strerror (val
));
879 return_val
= val
; /* remember failure */
881 else if (ep_is_exception_catchpoint (b
)
886 /* If we get here, we must have a callback mechanism for exception
887 events -- with g++ style embedded label support, we insert
888 ordinary breakpoints and not catchpoints. */
889 /* Format possible error message */
890 sprintf (message
, message1
, b
->number
);
892 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
895 /* Couldn't set breakpoint for some reason */
896 fprintf_unfiltered (tmp_error_stream
,
897 "Cannot insert catchpoint %d; disabling it.\n",
899 fprintf_filtered (tmp_error_stream
,
900 "Error accessing memory address ");
901 print_address_numeric (b
->address
, 1, tmp_error_stream
);
902 fprintf_filtered (tmp_error_stream
, ": %s.\n",
903 safe_strerror (val
));
904 b
->enable_state
= bp_disabled
;
908 /* Bp set, now make sure callbacks are enabled */
910 args_for_catchpoint_enable args
;
911 args
.kind
= b
->type
== bp_catch_catch
?
912 EX_EVENT_CATCH
: EX_EVENT_THROW
;
914 val
= catch_errors (cover_target_enable_exception_callback
,
916 message
, RETURN_MASK_ALL
);
917 if (val
!= 0 && val
!= -1)
921 /* Check if something went wrong; val == 0 can be ignored */
924 /* something went wrong */
925 fprintf_unfiltered (tmp_error_stream
,
926 "Cannot insert catchpoint %d; disabling it.\n",
928 b
->enable_state
= bp_disabled
;
933 return_val
= val
; /* remember failure */
936 else if ((b
->type
== bp_hardware_watchpoint
||
937 b
->type
== bp_read_watchpoint
||
938 b
->type
== bp_access_watchpoint
)
939 && b
->disposition
!= disp_del_at_next_stop
943 struct frame_info
*saved_frame
;
944 int saved_level
, within_current_scope
;
945 struct value
*mark
= value_mark ();
948 /* Save the current frame and level so we can restore it after
949 evaluating the watchpoint expression on its own frame. */
950 saved_frame
= deprecated_selected_frame
;
951 saved_level
= frame_relative_level (deprecated_selected_frame
);
953 /* Determine if the watchpoint is within scope. */
954 if (b
->exp_valid_block
== NULL
)
955 within_current_scope
= 1;
958 struct frame_info
*fi
;
959 fi
= frame_find_by_id (b
->watchpoint_frame
);
960 within_current_scope
= (fi
!= NULL
);
961 if (within_current_scope
)
965 if (within_current_scope
)
967 /* Evaluate the expression and cut the chain of values
968 produced off from the value chain.
970 Make sure the value returned isn't lazy; we use
971 laziness to determine what memory GDB actually needed
972 in order to compute the value of the expression. */
973 v
= evaluate_expression (b
->exp
);
975 value_release_to_mark (mark
);
980 /* Look at each value on the value chain. */
981 for (; v
; v
= v
->next
)
983 /* If it's a memory location, and GDB actually needed
984 its contents to evaluate the expression, then we
986 if (VALUE_LVAL (v
) == lval_memory
989 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
991 /* We only watch structs and arrays if user asked
992 for it explicitly, never if they just happen to
993 appear in the middle of some value chain. */
994 if (v
== b
->val_chain
995 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
996 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1001 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
1002 len
= TYPE_LENGTH (VALUE_TYPE (v
));
1004 if (b
->type
== bp_read_watchpoint
)
1006 else if (b
->type
== bp_access_watchpoint
)
1009 val
= target_insert_watchpoint (addr
, len
, type
);
1012 /* Don't exit the loop, try to insert
1013 every value on the value chain. That's
1014 because we will be removing all the
1015 watches below, and removing a
1016 watchpoint we didn't insert could have
1024 /* Failure to insert a watchpoint on any memory value in the
1025 value chain brings us here. */
1028 remove_breakpoint (b
, mark_uninserted
);
1029 hw_breakpoint_error
= 1;
1030 fprintf_unfiltered (tmp_error_stream
,
1031 "Could not insert hardware watchpoint %d.\n",
1038 printf_filtered ("Hardware watchpoint %d deleted ", b
->number
);
1039 printf_filtered ("because the program has left the block \n");
1040 printf_filtered ("in which its expression is valid.\n");
1041 if (b
->related_breakpoint
)
1042 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1043 b
->disposition
= disp_del_at_next_stop
;
1046 /* Restore the frame and level. */
1047 if ((saved_frame
!= deprecated_selected_frame
) ||
1048 (saved_level
!= frame_relative_level (deprecated_selected_frame
)))
1049 select_frame (saved_frame
);
1052 return_val
= val
; /* remember failure */
1054 else if ((b
->type
== bp_catch_fork
1055 || b
->type
== bp_catch_vfork
1056 || b
->type
== bp_catch_exec
)
1064 val
= target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
1066 case bp_catch_vfork
:
1067 val
= target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
1070 val
= target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
1073 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1078 fprintf_unfiltered (tmp_error_stream
,
1079 "Cannot insert catchpoint %d.", b
->number
);
1085 return_val
= val
; /* remember failure */
1091 /* If a hardware breakpoint or watchpoint was inserted, add a
1092 message about possibly exhausted resources. */
1093 if (hw_breakpoint_error
)
1095 fprintf_unfiltered (tmp_error_stream
,
1096 "Could not insert hardware breakpoints:\n\
1097 You may have requested too many hardware breakpoints/watchpoints.\n");
1099 #ifdef ONE_PROCESS_WRITETEXT
1100 if (process_warning
)
1101 fprintf_unfiltered (tmp_error_stream
,
1102 "The same program may be running in another process.");
1104 target_terminal_ours_for_output ();
1105 error_stream (tmp_error_stream
);
1111 remove_breakpoints (void)
1113 register struct breakpoint
*b
;
1120 val
= remove_breakpoint (b
, mark_uninserted
);
1129 remove_hw_watchpoints (void)
1131 register struct breakpoint
*b
;
1137 && (b
->type
== bp_hardware_watchpoint
1138 || b
->type
== bp_read_watchpoint
1139 || b
->type
== bp_access_watchpoint
))
1141 val
= remove_breakpoint (b
, mark_uninserted
);
1150 reattach_breakpoints (int pid
)
1152 register struct breakpoint
*b
;
1154 struct cleanup
*old_chain
= save_inferior_ptid ();
1156 /* Set inferior_ptid; remove_breakpoint uses this global. */
1157 inferior_ptid
= pid_to_ptid (pid
);
1162 remove_breakpoint (b
, mark_inserted
);
1163 if (b
->type
== bp_hardware_breakpoint
)
1164 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
1166 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
1169 do_cleanups (old_chain
);
1174 do_cleanups (old_chain
);
1179 update_breakpoints_after_exec (void)
1181 struct breakpoint
*b
;
1182 struct breakpoint
*temp
;
1184 /* Doing this first prevents the badness of having delete_breakpoint()
1185 write a breakpoint's current "shadow contents" to lift the bp. That
1186 shadow is NOT valid after an exec()! */
1187 mark_breakpoints_out ();
1189 ALL_BREAKPOINTS_SAFE (b
, temp
)
1191 /* Solib breakpoints must be explicitly reset after an exec(). */
1192 if (b
->type
== bp_shlib_event
)
1194 delete_breakpoint (b
);
1198 /* Thread event breakpoints must be set anew after an exec(),
1199 as must overlay event breakpoints. */
1200 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1202 delete_breakpoint (b
);
1206 /* Step-resume breakpoints are meaningless after an exec(). */
1207 if (b
->type
== bp_step_resume
)
1209 delete_breakpoint (b
);
1213 /* Ditto the sigtramp handler breakpoints. */
1214 if (b
->type
== bp_through_sigtramp
)
1216 delete_breakpoint (b
);
1220 /* Ditto the exception-handling catchpoints. */
1221 if ((b
->type
== bp_catch_catch
) || (b
->type
== bp_catch_throw
))
1223 delete_breakpoint (b
);
1227 /* Don't delete an exec catchpoint, because else the inferior
1228 won't stop when it ought!
1230 Similarly, we probably ought to keep vfork catchpoints, 'cause
1231 on this target, we may not be able to stop when the vfork is
1232 seen, but only when the subsequent exec is seen. (And because
1233 deleting fork catchpoints here but not vfork catchpoints will
1234 seem mysterious to users, keep those too.)
1236 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1237 target address field, if any, is sufficient to have it be reset
1238 automagically. Certainly on HP-UX that's true.
1240 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1241 valid code address on some platforms (like the mn10200 and
1242 mn10300 simulators). We shouldn't assign any special
1243 interpretation to a breakpoint with a zero address. And in
1244 fact, GDB doesn't --- I can't see what that comment above is
1245 talking about. As far as I can tell, setting the address of a
1246 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1247 is meaningless, since those are implemented with HP-UX kernel
1248 hackery, not by storing breakpoint instructions somewhere. */
1249 if ((b
->type
== bp_catch_exec
) ||
1250 (b
->type
== bp_catch_vfork
) ||
1251 (b
->type
== bp_catch_fork
))
1253 b
->address
= (CORE_ADDR
) NULL
;
1257 /* bp_finish is a special case. The only way we ought to be able
1258 to see one of these when an exec() has happened, is if the user
1259 caught a vfork, and then said "finish". Ordinarily a finish just
1260 carries them to the call-site of the current callee, by setting
1261 a temporary bp there and resuming. But in this case, the finish
1262 will carry them entirely through the vfork & exec.
1264 We don't want to allow a bp_finish to remain inserted now. But
1265 we can't safely delete it, 'cause finish_command has a handle to
1266 the bp on a bpstat, and will later want to delete it. There's a
1267 chance (and I've seen it happen) that if we delete the bp_finish
1268 here, that its storage will get reused by the time finish_command
1269 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1270 We really must allow finish_command to delete a bp_finish.
1272 In the absense of a general solution for the "how do we know
1273 it's safe to delete something others may have handles to?"
1274 problem, what we'll do here is just uninsert the bp_finish, and
1275 let finish_command delete it.
1277 (We know the bp_finish is "doomed" in the sense that it's
1278 momentary, and will be deleted as soon as finish_command sees
1279 the inferior stopped. So it doesn't matter that the bp's
1280 address is probably bogus in the new a.out, unlike e.g., the
1281 solib breakpoints.) */
1283 if (b
->type
== bp_finish
)
1288 /* Without a symbolic address, we have little hope of the
1289 pre-exec() address meaning the same thing in the post-exec()
1291 if (b
->addr_string
== NULL
)
1293 delete_breakpoint (b
);
1297 /* If this breakpoint has survived the above battery of checks, then
1298 it must have a symbolic address. Be sure that it gets reevaluated
1299 to a target address, rather than reusing the old evaluation.
1301 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1302 for bp_catch_exec and friends, I'm pretty sure this is entirely
1303 unnecessary. A call to breakpoint_re_set_one always recomputes
1304 the breakpoint's address from scratch, or deletes it if it can't.
1305 So I think this assignment could be deleted without effect. */
1306 b
->address
= (CORE_ADDR
) NULL
;
1308 /* FIXME what about longjmp breakpoints? Re-create them here? */
1309 create_overlay_event_breakpoint ("_ovly_debug_event");
1313 detach_breakpoints (int pid
)
1315 register struct breakpoint
*b
;
1317 struct cleanup
*old_chain
= save_inferior_ptid ();
1319 if (pid
== PIDGET (inferior_ptid
))
1320 error ("Cannot detach breakpoints of inferior_ptid");
1322 /* Set inferior_ptid; remove_breakpoint uses this global. */
1323 inferior_ptid
= pid_to_ptid (pid
);
1328 val
= remove_breakpoint (b
, mark_inserted
);
1331 do_cleanups (old_chain
);
1336 do_cleanups (old_chain
);
1341 remove_breakpoint (struct breakpoint
*b
, insertion_state_t is
)
1345 if (b
->enable_state
== bp_permanent
)
1346 /* Permanent breakpoints cannot be inserted or removed. */
1349 if (b
->type
== bp_none
)
1350 warning ("attempted to remove apparently deleted breakpoint #%d?",
1353 if (b
->type
!= bp_watchpoint
1354 && b
->type
!= bp_hardware_watchpoint
1355 && b
->type
!= bp_read_watchpoint
1356 && b
->type
!= bp_access_watchpoint
1357 && b
->type
!= bp_catch_fork
1358 && b
->type
!= bp_catch_vfork
1359 && b
->type
!= bp_catch_exec
1360 && b
->type
!= bp_catch_catch
1361 && b
->type
!= bp_catch_throw
)
1363 /* "Normal" instruction breakpoint: either the standard
1364 trap-instruction bp (bp_breakpoint), or a
1365 bp_hardware_breakpoint. */
1367 /* First check to see if we have to handle an overlay. */
1368 if (overlay_debugging
== ovly_off
1369 || b
->section
== NULL
1370 || !(section_is_overlay (b
->section
)))
1372 /* No overlay handling: just remove the breakpoint. */
1374 if (b
->type
== bp_hardware_breakpoint
)
1375 val
= target_remove_hw_breakpoint (b
->address
,
1376 b
->shadow_contents
);
1378 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1382 /* This breakpoint is in an overlay section.
1383 Did we set a breakpoint at the LMA? */
1384 if (!overlay_events_enabled
)
1386 /* Yes -- overlay event support is not active, so we
1387 should have set a breakpoint at the LMA. Remove it.
1389 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
1391 /* Ignore any failures: if the LMA is in ROM, we will
1392 have already warned when we failed to insert it. */
1393 if (b
->type
!= bp_hardware_breakpoint
)
1394 target_remove_hw_breakpoint (addr
, b
->shadow_contents
);
1396 target_remove_breakpoint (addr
, b
->shadow_contents
);
1398 /* Did we set a breakpoint at the VMA?
1399 If so, we will have marked the breakpoint 'inserted'. */
1402 /* Yes -- remove it. Previously we did not bother to
1403 remove the breakpoint if the section had been
1404 unmapped, but let's not rely on that being safe. We
1405 don't know what the overlay manager might do. */
1406 if (b
->type
== bp_hardware_breakpoint
)
1407 val
= target_remove_hw_breakpoint (b
->address
,
1408 b
->shadow_contents
);
1410 val
= target_remove_breakpoint (b
->address
,
1411 b
->shadow_contents
);
1415 /* No -- not inserted, so no need to remove. No error. */
1421 b
->inserted
= (is
== mark_inserted
);
1423 else if ((b
->type
== bp_hardware_watchpoint
||
1424 b
->type
== bp_read_watchpoint
||
1425 b
->type
== bp_access_watchpoint
)
1426 && b
->enable_state
== bp_enabled
1432 b
->inserted
= (is
== mark_inserted
);
1433 /* Walk down the saved value chain. */
1434 for (v
= b
->val_chain
; v
; v
= v
->next
)
1436 /* For each memory reference remove the watchpoint
1438 if (VALUE_LVAL (v
) == lval_memory
1439 && ! VALUE_LAZY (v
))
1441 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
1443 if (v
== b
->val_chain
1444 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1445 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1450 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
1451 len
= TYPE_LENGTH (VALUE_TYPE (v
));
1453 if (b
->type
== bp_read_watchpoint
)
1455 else if (b
->type
== bp_access_watchpoint
)
1458 val
= target_remove_watchpoint (addr
, len
, type
);
1465 /* Failure to remove any of the hardware watchpoints comes here. */
1466 if ((is
== mark_uninserted
) && (b
->inserted
))
1467 warning ("Could not remove hardware watchpoint %d.",
1470 /* Free the saved value chain. We will construct a new one
1471 the next time the watchpoint is inserted. */
1472 for (v
= b
->val_chain
; v
; v
= n
)
1477 b
->val_chain
= NULL
;
1479 else if ((b
->type
== bp_catch_fork
||
1480 b
->type
== bp_catch_vfork
||
1481 b
->type
== bp_catch_exec
)
1482 && b
->enable_state
== bp_enabled
1489 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1491 case bp_catch_vfork
:
1492 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1495 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1498 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1503 b
->inserted
= (is
== mark_inserted
);
1505 else if ((b
->type
== bp_catch_catch
||
1506 b
->type
== bp_catch_throw
)
1507 && b
->enable_state
== bp_enabled
1511 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1514 b
->inserted
= (is
== mark_inserted
);
1516 else if (ep_is_exception_catchpoint (b
)
1517 && b
->inserted
/* sometimes previous insert doesn't happen */
1518 && b
->enable_state
== bp_enabled
1522 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1526 b
->inserted
= (is
== mark_inserted
);
1532 /* Clear the "inserted" flag in all breakpoints. */
1535 mark_breakpoints_out (void)
1537 register struct breakpoint
*b
;
1543 /* Clear the "inserted" flag in all breakpoints and delete any
1544 breakpoints which should go away between runs of the program.
1546 Plus other such housekeeping that has to be done for breakpoints
1549 Note: this function gets called at the end of a run (by
1550 generic_mourn_inferior) and when a run begins (by
1551 init_wait_for_inferior). */
1556 breakpoint_init_inferior (enum inf_context context
)
1558 register struct breakpoint
*b
, *temp
;
1559 static int warning_needed
= 0;
1561 ALL_BREAKPOINTS_SAFE (b
, temp
)
1568 case bp_watchpoint_scope
:
1570 /* If the call dummy breakpoint is at the entry point it will
1571 cause problems when the inferior is rerun, so we better
1574 Also get rid of scope breakpoints. */
1575 delete_breakpoint (b
);
1579 case bp_hardware_watchpoint
:
1580 case bp_read_watchpoint
:
1581 case bp_access_watchpoint
:
1583 /* Likewise for watchpoints on local expressions. */
1584 if (b
->exp_valid_block
!= NULL
)
1585 delete_breakpoint (b
);
1586 if (context
== inf_starting
)
1588 /* Reset val field to force reread of starting value
1589 in insert_breakpoints. */
1591 value_free (b
->val
);
1596 /* Likewise for exception catchpoints in dynamic-linked
1597 executables where required */
1598 if (ep_is_exception_catchpoint (b
) &&
1599 exception_catchpoints_are_fragile
)
1602 delete_breakpoint (b
);
1608 if (exception_catchpoints_are_fragile
)
1609 exception_support_initialized
= 0;
1611 /* Don't issue the warning unless it's really needed... */
1612 if (warning_needed
&& (context
!= inf_exited
))
1614 warning ("Exception catchpoints from last run were deleted.");
1615 warning ("You must reinsert them explicitly.");
1620 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1621 exists at PC. It returns ordinary_breakpoint_here if it's an
1622 ordinary breakpoint, or permanent_breakpoint_here if it's a
1623 permanent breakpoint.
1624 - When continuing from a location with an ordinary breakpoint, we
1625 actually single step once before calling insert_breakpoints.
1626 - When continuing from a localion with a permanent breakpoint, we
1627 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1628 the target, to advance the PC past the breakpoint. */
1630 enum breakpoint_here
1631 breakpoint_here_p (CORE_ADDR pc
)
1633 register struct breakpoint
*b
;
1634 int any_breakpoint_here
= 0;
1637 if ((b
->enable_state
== bp_enabled
1638 || b
->enable_state
== bp_permanent
)
1639 && b
->address
== pc
) /* bp is enabled and matches pc */
1641 if (overlay_debugging
1642 && section_is_overlay (b
->section
)
1643 && !section_is_mapped (b
->section
))
1644 continue; /* unmapped overlay -- can't be a match */
1645 else if (b
->enable_state
== bp_permanent
)
1646 return permanent_breakpoint_here
;
1648 any_breakpoint_here
= 1;
1651 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1655 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1656 but it only returns true if there is actually a breakpoint inserted
1660 breakpoint_inserted_here_p (CORE_ADDR pc
)
1662 register struct breakpoint
*b
;
1666 && b
->address
== pc
) /* bp is inserted and matches pc */
1668 if (overlay_debugging
1669 && section_is_overlay (b
->section
)
1670 && !section_is_mapped (b
->section
))
1671 continue; /* unmapped overlay -- can't be a match */
1679 /* Return nonzero if FRAME is a dummy frame. We can't use
1680 DEPRECATED_PC_IN_CALL_DUMMY because figuring out the saved SP would
1681 take too much time, at least using get_saved_register on the 68k.
1682 This means that for this function to work right a port must use the
1683 bp_call_dummy breakpoint. */
1686 deprecated_frame_in_dummy (struct frame_info
*frame
)
1688 struct breakpoint
*b
;
1693 /* This function is used by two files: get_frame_type(), after first
1694 checking that !DEPRECATED_USE_GENERIC_DUMMY_FRAMES; and
1695 sparc-tdep.c, which doesn't yet use generic dummy frames anyway. */
1696 gdb_assert (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES
);
1700 if (b
->type
== bp_call_dummy
1701 && frame_id_eq (b
->frame_id
, get_frame_id (frame
))
1702 /* We need to check the PC as well as the frame on the sparc,
1703 for signals.exp in the testsuite. */
1704 && (get_frame_pc (frame
)
1706 - SIZEOF_CALL_DUMMY_WORDS
/ sizeof (LONGEST
) * REGISTER_SIZE
))
1707 && get_frame_pc (frame
) <= b
->address
)
1713 /* breakpoint_thread_match (PC, PID) returns true if the breakpoint at
1714 PC is valid for process/thread PID. */
1717 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1719 struct breakpoint
*b
;
1722 thread
= pid_to_thread_id (ptid
);
1725 if (b
->enable_state
!= bp_disabled
1726 && b
->enable_state
!= bp_shlib_disabled
1727 && b
->enable_state
!= bp_call_disabled
1729 && (b
->thread
== -1 || b
->thread
== thread
))
1731 if (overlay_debugging
1732 && section_is_overlay (b
->section
)
1733 && !section_is_mapped (b
->section
))
1734 continue; /* unmapped overlay -- can't be a match */
1743 /* bpstat stuff. External routines' interfaces are documented
1747 ep_is_catchpoint (struct breakpoint
*ep
)
1750 (ep
->type
== bp_catch_load
)
1751 || (ep
->type
== bp_catch_unload
)
1752 || (ep
->type
== bp_catch_fork
)
1753 || (ep
->type
== bp_catch_vfork
)
1754 || (ep
->type
== bp_catch_exec
)
1755 || (ep
->type
== bp_catch_catch
)
1756 || (ep
->type
== bp_catch_throw
);
1758 /* ??rehrauer: Add more kinds here, as are implemented... */
1762 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1765 (ep
->type
== bp_catch_load
)
1766 || (ep
->type
== bp_catch_unload
);
1770 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1773 (ep
->type
== bp_catch_catch
)
1774 || (ep
->type
== bp_catch_throw
);
1777 /* Clear a bpstat so that it says we are not at any breakpoint.
1778 Also free any storage that is part of a bpstat. */
1781 bpstat_clear (bpstat
*bsp
)
1792 if (p
->old_val
!= NULL
)
1793 value_free (p
->old_val
);
1794 free_command_lines (&p
->commands
);
1801 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1802 is part of the bpstat is copied as well. */
1805 bpstat_copy (bpstat bs
)
1809 bpstat retval
= NULL
;
1814 for (; bs
!= NULL
; bs
= bs
->next
)
1816 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1817 memcpy (tmp
, bs
, sizeof (*tmp
));
1819 /* This is the first thing in the chain. */
1829 /* Find the bpstat associated with this breakpoint */
1832 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1837 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1839 if (bsp
->breakpoint_at
== breakpoint
)
1845 /* Find a step_resume breakpoint associated with this bpstat.
1846 (If there are multiple step_resume bp's on the list, this function
1847 will arbitrarily pick one.)
1849 It is an error to use this function if BPSTAT doesn't contain a
1850 step_resume breakpoint.
1852 See wait_for_inferior's use of this function. */
1854 bpstat_find_step_resume_breakpoint (bpstat bsp
)
1859 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1861 current_thread
= pid_to_thread_id (inferior_ptid
);
1863 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1865 if ((bsp
->breakpoint_at
!= NULL
) &&
1866 (bsp
->breakpoint_at
->type
== bp_step_resume
) &&
1867 (bsp
->breakpoint_at
->thread
== current_thread
||
1868 bsp
->breakpoint_at
->thread
== -1))
1869 return bsp
->breakpoint_at
;
1872 error ("Internal error (no step_resume breakpoint found)");
1876 /* Return the breakpoint number of the first breakpoint we are stopped
1877 at. *BSP upon return is a bpstat which points to the remaining
1878 breakpoints stopped at (but which is not guaranteed to be good for
1879 anything but further calls to bpstat_num).
1880 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1883 bpstat_num (bpstat
*bsp
)
1885 struct breakpoint
*b
;
1888 return 0; /* No more breakpoint values */
1891 b
= (*bsp
)->breakpoint_at
;
1892 *bsp
= (*bsp
)->next
;
1894 return -1; /* breakpoint that's been deleted since */
1896 return b
->number
; /* We have its number */
1900 /* Modify BS so that the actions will not be performed. */
1903 bpstat_clear_actions (bpstat bs
)
1905 for (; bs
!= NULL
; bs
= bs
->next
)
1907 free_command_lines (&bs
->commands
);
1908 if (bs
->old_val
!= NULL
)
1910 value_free (bs
->old_val
);
1916 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1919 cleanup_executing_breakpoints (PTR ignore
)
1921 executing_breakpoint_commands
= 0;
1924 /* Execute all the commands associated with all the breakpoints at this
1925 location. Any of these commands could cause the process to proceed
1926 beyond this point, etc. We look out for such changes by checking
1927 the global "breakpoint_proceeded" after each command. */
1930 bpstat_do_actions (bpstat
*bsp
)
1933 struct cleanup
*old_chain
;
1934 struct command_line
*cmd
;
1936 /* Avoid endless recursion if a `source' command is contained
1938 if (executing_breakpoint_commands
)
1941 executing_breakpoint_commands
= 1;
1942 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
1945 /* Note that (as of this writing), our callers all appear to
1946 be passing us the address of global stop_bpstat. And, if
1947 our calls to execute_control_command cause the inferior to
1948 proceed, that global (and hence, *bsp) will change.
1950 We must be careful to not touch *bsp unless the inferior
1951 has not proceeded. */
1953 /* This pointer will iterate over the list of bpstat's. */
1956 breakpoint_proceeded
= 0;
1957 for (; bs
!= NULL
; bs
= bs
->next
)
1962 execute_control_command (cmd
);
1964 if (breakpoint_proceeded
)
1969 if (breakpoint_proceeded
)
1970 /* The inferior is proceeded by the command; bomb out now.
1971 The bpstat chain has been blown away by wait_for_inferior.
1972 But since execution has stopped again, there is a new bpstat
1973 to look at, so start over. */
1976 free_command_lines (&bs
->commands
);
1978 do_cleanups (old_chain
);
1981 /* This is the normal print function for a bpstat. In the future,
1982 much of this logic could (should?) be moved to bpstat_stop_status,
1983 by having it set different print_it values.
1985 Current scheme: When we stop, bpstat_print() is called. It loops
1986 through the bpstat list of things causing this stop, calling the
1987 print_bp_stop_message function on each one. The behavior of the
1988 print_bp_stop_message function depends on the print_it field of
1989 bpstat. If such field so indicates, call this function here.
1991 Return values from this routine (ultimately used by bpstat_print()
1992 and normal_stop() to decide what to do):
1993 PRINT_NOTHING: Means we already printed all we needed to print,
1994 don't print anything else.
1995 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
1996 that something to be followed by a location.
1997 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
1998 that something to be followed by a location.
1999 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2002 static enum print_stop_action
2003 print_it_typical (bpstat bs
)
2005 struct cleanup
*old_chain
;
2006 struct ui_stream
*stb
;
2007 stb
= ui_out_stream_new (uiout
);
2008 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2009 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2010 which has since been deleted. */
2011 if (bs
->breakpoint_at
== NULL
)
2012 return PRINT_UNKNOWN
;
2014 switch (bs
->breakpoint_at
->type
)
2017 case bp_hardware_breakpoint
:
2018 annotate_breakpoint (bs
->breakpoint_at
->number
);
2019 ui_out_text (uiout
, "\nBreakpoint ");
2020 if (ui_out_is_mi_like_p (uiout
))
2021 ui_out_field_string (uiout
, "reason", "breakpoint-hit");
2022 ui_out_field_int (uiout
, "bkptno", bs
->breakpoint_at
->number
);
2023 ui_out_text (uiout
, ", ");
2024 return PRINT_SRC_AND_LOC
;
2027 case bp_shlib_event
:
2028 /* Did we stop because the user set the stop_on_solib_events
2029 variable? (If so, we report this as a generic, "Stopped due
2030 to shlib event" message.) */
2031 printf_filtered ("Stopped due to shared library event\n");
2032 return PRINT_NOTHING
;
2035 case bp_thread_event
:
2036 /* Not sure how we will get here.
2037 GDB should not stop for these breakpoints. */
2038 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
2039 return PRINT_NOTHING
;
2042 case bp_overlay_event
:
2043 /* By analogy with the thread event, GDB should not stop for these. */
2044 printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n");
2045 return PRINT_NOTHING
;
2049 annotate_catchpoint (bs
->breakpoint_at
->number
);
2050 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2051 printf_filtered ("loaded");
2052 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2053 return PRINT_SRC_AND_LOC
;
2056 case bp_catch_unload
:
2057 annotate_catchpoint (bs
->breakpoint_at
->number
);
2058 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2059 printf_filtered ("unloaded");
2060 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2061 return PRINT_SRC_AND_LOC
;
2065 annotate_catchpoint (bs
->breakpoint_at
->number
);
2066 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2067 printf_filtered ("forked");
2068 printf_filtered (" process %d), ",
2069 bs
->breakpoint_at
->forked_inferior_pid
);
2070 return PRINT_SRC_AND_LOC
;
2073 case bp_catch_vfork
:
2074 annotate_catchpoint (bs
->breakpoint_at
->number
);
2075 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2076 printf_filtered ("vforked");
2077 printf_filtered (" process %d), ",
2078 bs
->breakpoint_at
->forked_inferior_pid
);
2079 return PRINT_SRC_AND_LOC
;
2083 annotate_catchpoint (bs
->breakpoint_at
->number
);
2084 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
2085 bs
->breakpoint_at
->number
,
2086 bs
->breakpoint_at
->exec_pathname
);
2087 return PRINT_SRC_AND_LOC
;
2090 case bp_catch_catch
:
2091 if (current_exception_event
&&
2092 (CURRENT_EXCEPTION_KIND
== EX_EVENT_CATCH
))
2094 annotate_catchpoint (bs
->breakpoint_at
->number
);
2095 printf_filtered ("\nCatchpoint %d (exception caught), ",
2096 bs
->breakpoint_at
->number
);
2097 printf_filtered ("throw location ");
2098 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2099 printf_filtered ("%s:%d",
2100 CURRENT_EXCEPTION_THROW_FILE
,
2101 CURRENT_EXCEPTION_THROW_LINE
);
2103 printf_filtered ("unknown");
2105 printf_filtered (", catch location ");
2106 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2107 printf_filtered ("%s:%d",
2108 CURRENT_EXCEPTION_CATCH_FILE
,
2109 CURRENT_EXCEPTION_CATCH_LINE
);
2111 printf_filtered ("unknown");
2113 printf_filtered ("\n");
2114 /* don't bother to print location frame info */
2115 return PRINT_SRC_ONLY
;
2119 /* really throw, some other bpstat will handle it */
2120 return PRINT_UNKNOWN
;
2124 case bp_catch_throw
:
2125 if (current_exception_event
&&
2126 (CURRENT_EXCEPTION_KIND
== EX_EVENT_THROW
))
2128 annotate_catchpoint (bs
->breakpoint_at
->number
);
2129 printf_filtered ("\nCatchpoint %d (exception thrown), ",
2130 bs
->breakpoint_at
->number
);
2131 printf_filtered ("throw location ");
2132 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2133 printf_filtered ("%s:%d",
2134 CURRENT_EXCEPTION_THROW_FILE
,
2135 CURRENT_EXCEPTION_THROW_LINE
);
2137 printf_filtered ("unknown");
2139 printf_filtered (", catch location ");
2140 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2141 printf_filtered ("%s:%d",
2142 CURRENT_EXCEPTION_CATCH_FILE
,
2143 CURRENT_EXCEPTION_CATCH_LINE
);
2145 printf_filtered ("unknown");
2147 printf_filtered ("\n");
2148 /* don't bother to print location frame info */
2149 return PRINT_SRC_ONLY
;
2153 /* really catch, some other bpstat will handle it */
2154 return PRINT_UNKNOWN
;
2159 case bp_hardware_watchpoint
:
2160 if (bs
->old_val
!= NULL
)
2162 annotate_watchpoint (bs
->breakpoint_at
->number
);
2163 if (ui_out_is_mi_like_p (uiout
))
2164 ui_out_field_string (uiout
, "reason", "watchpoint-trigger");
2165 mention (bs
->breakpoint_at
);
2166 ui_out_tuple_begin (uiout
, "value");
2167 ui_out_text (uiout
, "\nOld value = ");
2168 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2169 ui_out_field_stream (uiout
, "old", stb
);
2170 ui_out_text (uiout
, "\nNew value = ");
2171 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2172 ui_out_field_stream (uiout
, "new", stb
);
2173 ui_out_tuple_end (uiout
);
2174 ui_out_text (uiout
, "\n");
2175 value_free (bs
->old_val
);
2178 /* More than one watchpoint may have been triggered. */
2179 return PRINT_UNKNOWN
;
2182 case bp_read_watchpoint
:
2183 if (ui_out_is_mi_like_p (uiout
))
2184 ui_out_field_string (uiout
, "reason", "read-watchpoint-trigger");
2185 mention (bs
->breakpoint_at
);
2186 ui_out_tuple_begin (uiout
, "value");
2187 ui_out_text (uiout
, "\nValue = ");
2188 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2189 ui_out_field_stream (uiout
, "value", stb
);
2190 ui_out_tuple_end (uiout
);
2191 ui_out_text (uiout
, "\n");
2192 return PRINT_UNKNOWN
;
2195 case bp_access_watchpoint
:
2196 if (bs
->old_val
!= NULL
)
2198 annotate_watchpoint (bs
->breakpoint_at
->number
);
2199 if (ui_out_is_mi_like_p (uiout
))
2200 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2201 mention (bs
->breakpoint_at
);
2202 ui_out_tuple_begin (uiout
, "value");
2203 ui_out_text (uiout
, "\nOld value = ");
2204 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2205 ui_out_field_stream (uiout
, "old", stb
);
2206 value_free (bs
->old_val
);
2208 ui_out_text (uiout
, "\nNew value = ");
2212 mention (bs
->breakpoint_at
);
2213 if (ui_out_is_mi_like_p (uiout
))
2214 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2215 ui_out_tuple_begin (uiout
, "value");
2216 ui_out_text (uiout
, "\nValue = ");
2218 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0,Val_pretty_default
);
2219 ui_out_field_stream (uiout
, "new", stb
);
2220 ui_out_tuple_end (uiout
);
2221 ui_out_text (uiout
, "\n");
2222 return PRINT_UNKNOWN
;
2225 /* Fall through, we don't deal with these types of breakpoints
2229 if (ui_out_is_mi_like_p (uiout
))
2230 ui_out_field_string (uiout
, "reason", "function-finished");
2231 return PRINT_UNKNOWN
;
2235 if (ui_out_is_mi_like_p (uiout
))
2236 ui_out_field_string (uiout
, "reason", "location-reached");
2237 return PRINT_UNKNOWN
;
2242 case bp_longjmp_resume
:
2243 case bp_step_resume
:
2244 case bp_through_sigtramp
:
2245 case bp_watchpoint_scope
:
2248 return PRINT_UNKNOWN
;
2252 /* Generic routine for printing messages indicating why we
2253 stopped. The behavior of this function depends on the value
2254 'print_it' in the bpstat structure. Under some circumstances we
2255 may decide not to print anything here and delegate the task to
2258 static enum print_stop_action
2259 print_bp_stop_message (bpstat bs
)
2261 switch (bs
->print_it
)
2264 /* Nothing should be printed for this bpstat entry. */
2265 return PRINT_UNKNOWN
;
2269 /* We still want to print the frame, but we already printed the
2270 relevant messages. */
2271 return PRINT_SRC_AND_LOC
;
2274 case print_it_normal
:
2275 /* Normal case, we handle everything in print_it_typical. */
2276 return print_it_typical (bs
);
2279 internal_error (__FILE__
, __LINE__
,
2280 "print_bp_stop_message: unrecognized enum value");
2285 /* Print a message indicating what happened. This is called from
2286 normal_stop(). The input to this routine is the head of the bpstat
2287 list - a list of the eventpoints that caused this stop. This
2288 routine calls the generic print routine for printing a message
2289 about reasons for stopping. This will print (for example) the
2290 "Breakpoint n," part of the output. The return value of this
2293 PRINT_UNKNOWN: Means we printed nothing
2294 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2295 code to print the location. An example is
2296 "Breakpoint 1, " which should be followed by
2298 PRINT_SRC_ONLY: Means we printed something, but there is no need
2299 to also print the location part of the message.
2300 An example is the catch/throw messages, which
2301 don't require a location appended to the end.
2302 PRINT_NOTHING: We have done some printing and we don't need any
2303 further info to be printed.*/
2305 enum print_stop_action
2306 bpstat_print (bpstat bs
)
2310 /* Maybe another breakpoint in the chain caused us to stop.
2311 (Currently all watchpoints go on the bpstat whether hit or not.
2312 That probably could (should) be changed, provided care is taken
2313 with respect to bpstat_explains_signal). */
2314 for (; bs
; bs
= bs
->next
)
2316 val
= print_bp_stop_message (bs
);
2317 if (val
== PRINT_SRC_ONLY
2318 || val
== PRINT_SRC_AND_LOC
2319 || val
== PRINT_NOTHING
)
2323 /* We reached the end of the chain, or we got a null BS to start
2324 with and nothing was printed. */
2325 return PRINT_UNKNOWN
;
2328 /* Evaluate the expression EXP and return 1 if value is zero.
2329 This is used inside a catch_errors to evaluate the breakpoint condition.
2330 The argument is a "struct expression *" that has been cast to char * to
2331 make it pass through catch_errors. */
2334 breakpoint_cond_eval (PTR exp
)
2336 struct value
*mark
= value_mark ();
2337 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2338 value_free_to_mark (mark
);
2342 /* Allocate a new bpstat and chain it to the current one. */
2345 bpstat_alloc (struct breakpoint
*b
, bpstat cbs
/* Current "bs" value */ )
2349 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2351 bs
->breakpoint_at
= b
;
2352 /* If the condition is false, etc., don't do the commands. */
2353 bs
->commands
= NULL
;
2355 bs
->print_it
= print_it_normal
;
2359 /* Possible return values for watchpoint_check (this can't be an enum
2360 because of check_errors). */
2361 /* The watchpoint has been deleted. */
2362 #define WP_DELETED 1
2363 /* The value has changed. */
2364 #define WP_VALUE_CHANGED 2
2365 /* The value has not changed. */
2366 #define WP_VALUE_NOT_CHANGED 3
2368 #define BP_TEMPFLAG 1
2369 #define BP_HARDWAREFLAG 2
2371 /* Check watchpoint condition. */
2374 watchpoint_check (PTR p
)
2376 bpstat bs
= (bpstat
) p
;
2377 struct breakpoint
*b
;
2378 struct frame_info
*fr
;
2379 int within_current_scope
;
2381 b
= bs
->breakpoint_at
;
2383 if (b
->exp_valid_block
== NULL
)
2384 within_current_scope
= 1;
2387 /* There is no current frame at this moment. If we're going to have
2388 any chance of handling watchpoints on local variables, we'll need
2389 the frame chain (so we can determine if we're in scope). */
2390 reinit_frame_cache ();
2391 fr
= frame_find_by_id (b
->watchpoint_frame
);
2392 within_current_scope
= (fr
!= NULL
);
2393 /* in_function_epilogue_p() returns a non-zero value if we're still
2394 in the function but the stack frame has already been invalidated.
2395 Since we can't rely on the values of local variables after the
2396 stack has been destroyed, we are treating the watchpoint in that
2397 state as `not changed' without further checking. */
2398 if (within_current_scope
&& fr
== get_current_frame ()
2399 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2400 return WP_VALUE_NOT_CHANGED
;
2401 if (within_current_scope
)
2402 /* If we end up stopping, the current frame will get selected
2403 in normal_stop. So this call to select_frame won't affect
2408 if (within_current_scope
)
2410 /* We use value_{,free_to_}mark because it could be a
2411 *long* time before we return to the command level and
2412 call free_all_values. We can't call free_all_values because
2413 we might be in the middle of evaluating a function call. */
2415 struct value
*mark
= value_mark ();
2416 struct value
*new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
2417 if (!value_equal (b
->val
, new_val
))
2419 release_value (new_val
);
2420 value_free_to_mark (mark
);
2421 bs
->old_val
= b
->val
;
2423 /* We will stop here */
2424 return WP_VALUE_CHANGED
;
2428 /* Nothing changed, don't do anything. */
2429 value_free_to_mark (mark
);
2430 /* We won't stop here */
2431 return WP_VALUE_NOT_CHANGED
;
2436 /* This seems like the only logical thing to do because
2437 if we temporarily ignored the watchpoint, then when
2438 we reenter the block in which it is valid it contains
2439 garbage (in the case of a function, it may have two
2440 garbage values, one before and one after the prologue).
2441 So we can't even detect the first assignment to it and
2442 watch after that (since the garbage may or may not equal
2443 the first value assigned). */
2444 /* We print all the stop information in print_it_typical(), but
2445 in this case, by the time we call print_it_typical() this bp
2446 will be deleted already. So we have no choice but print the
2447 information here. */
2448 if (ui_out_is_mi_like_p (uiout
))
2449 ui_out_field_string (uiout
, "reason", "watchpoint-scope");
2450 ui_out_text (uiout
, "\nWatchpoint ");
2451 ui_out_field_int (uiout
, "wpnum", bs
->breakpoint_at
->number
);
2452 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2453 which its expression is valid.\n");
2455 if (b
->related_breakpoint
)
2456 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2457 b
->disposition
= disp_del_at_next_stop
;
2463 /* Get a bpstat associated with having just stopped at address *PC
2464 and frame address CORE_ADDRESS. Update *PC to point at the
2465 breakpoint (if we hit a breakpoint). NOT_A_SW_BREAKPOINT is nonzero
2466 if this is known to not be a real breakpoint (it could still be a
2467 watchpoint, though). */
2469 /* Determine whether we stopped at a breakpoint, etc, or whether we
2470 don't understand this stop. Result is a chain of bpstat's such that:
2472 if we don't understand the stop, the result is a null pointer.
2474 if we understand why we stopped, the result is not null.
2476 Each element of the chain refers to a particular breakpoint or
2477 watchpoint at which we have stopped. (We may have stopped for
2478 several reasons concurrently.)
2480 Each element of the chain has valid next, breakpoint_at,
2481 commands, FIXME??? fields. */
2484 bpstat_stop_status (CORE_ADDR
*pc
, int not_a_sw_breakpoint
)
2486 register struct breakpoint
*b
, *temp
;
2488 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2489 int real_breakpoint
= 0;
2490 /* Root of the chain of bpstat's */
2491 struct bpstats root_bs
[1];
2492 /* Pointer to the last thing in the chain currently. */
2493 bpstat bs
= root_bs
;
2494 static char message1
[] =
2495 "Error evaluating expression for watchpoint %d\n";
2496 char message
[sizeof (message1
) + 30 /* slop */ ];
2498 /* Get the address where the breakpoint would have been. The
2499 "not_a_sw_breakpoint" argument is meant to distinguish between a
2500 breakpoint trap event and a trace/singlestep trap event. For a
2501 trace/singlestep trap event, we would not want to subtract
2502 DECR_PC_AFTER_BREAK from the PC. */
2504 bp_addr
= *pc
- (not_a_sw_breakpoint
? 0 : DECR_PC_AFTER_BREAK
);
2506 ALL_BREAKPOINTS_SAFE (b
, temp
)
2508 if (b
->enable_state
== bp_disabled
2509 || b
->enable_state
== bp_shlib_disabled
2510 || b
->enable_state
== bp_call_disabled
)
2513 if (b
->type
!= bp_watchpoint
2514 && b
->type
!= bp_hardware_watchpoint
2515 && b
->type
!= bp_read_watchpoint
2516 && b
->type
!= bp_access_watchpoint
2517 && b
->type
!= bp_hardware_breakpoint
2518 && b
->type
!= bp_catch_fork
2519 && b
->type
!= bp_catch_vfork
2520 && b
->type
!= bp_catch_exec
2521 && b
->type
!= bp_catch_catch
2522 && b
->type
!= bp_catch_throw
) /* a non-watchpoint bp */
2524 if (b
->address
!= bp_addr
) /* address doesn't match */
2526 if (overlay_debugging
/* unmapped overlay section */
2527 && section_is_overlay (b
->section
)
2528 && !section_is_mapped (b
->section
))
2532 if (b
->type
== bp_hardware_breakpoint
)
2534 if (b
->address
!= (*pc
- DECR_PC_AFTER_HW_BREAK
))
2536 if (overlay_debugging
/* unmapped overlay section */
2537 && section_is_overlay (b
->section
)
2538 && !section_is_mapped (b
->section
))
2542 /* Is this a catchpoint of a load or unload? If so, did we
2543 get a load or unload of the specified library? If not,
2545 if ((b
->type
== bp_catch_load
)
2546 #if defined(SOLIB_HAVE_LOAD_EVENT)
2547 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2548 || ((b
->dll_pathname
!= NULL
)
2549 && (strcmp (b
->dll_pathname
,
2550 SOLIB_LOADED_LIBRARY_PATHNAME (
2551 PIDGET (inferior_ptid
)))
2557 if ((b
->type
== bp_catch_unload
)
2558 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2559 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2560 || ((b
->dll_pathname
!= NULL
)
2561 && (strcmp (b
->dll_pathname
,
2562 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2563 PIDGET (inferior_ptid
)))
2569 if ((b
->type
== bp_catch_fork
)
2570 && !inferior_has_forked (PIDGET (inferior_ptid
),
2571 &b
->forked_inferior_pid
))
2574 if ((b
->type
== bp_catch_vfork
)
2575 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2576 &b
->forked_inferior_pid
))
2579 if ((b
->type
== bp_catch_exec
)
2580 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2583 if (ep_is_exception_catchpoint (b
) &&
2584 !(current_exception_event
= target_get_current_exception_event ()))
2587 /* Come here if it's a watchpoint, or if the break address matches */
2589 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
2591 /* Watchpoints may change this, if not found to have triggered. */
2595 sprintf (message
, message1
, b
->number
);
2596 if (b
->type
== bp_watchpoint
||
2597 b
->type
== bp_hardware_watchpoint
)
2599 switch (catch_errors (watchpoint_check
, bs
, message
,
2603 /* We've already printed what needs to be printed. */
2604 /* Actually this is superfluous, because by the time we
2605 call print_it_typical() the wp will be already deleted,
2606 and the function will return immediately. */
2607 bs
->print_it
= print_it_done
;
2610 case WP_VALUE_CHANGED
:
2614 case WP_VALUE_NOT_CHANGED
:
2616 bs
->print_it
= print_it_noop
;
2623 /* Error from catch_errors. */
2624 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2625 if (b
->related_breakpoint
)
2626 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2627 b
->disposition
= disp_del_at_next_stop
;
2628 /* We've already printed what needs to be printed. */
2629 bs
->print_it
= print_it_done
;
2635 else if (b
->type
== bp_read_watchpoint
||
2636 b
->type
== bp_access_watchpoint
)
2642 addr
= target_stopped_data_address ();
2645 for (v
= b
->val_chain
; v
; v
= v
->next
)
2647 if (VALUE_LVAL (v
) == lval_memory
2648 && ! VALUE_LAZY (v
))
2650 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
2652 if (v
== b
->val_chain
2653 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
2654 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
2658 vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
2659 /* Exact match not required. Within range is
2661 if (addr
>= vaddr
&&
2662 addr
< vaddr
+ TYPE_LENGTH (VALUE_TYPE (v
)))
2668 switch (catch_errors (watchpoint_check
, bs
, message
,
2672 /* We've already printed what needs to be printed. */
2673 bs
->print_it
= print_it_done
;
2676 case WP_VALUE_CHANGED
:
2677 if (b
->type
== bp_read_watchpoint
)
2679 /* Don't stop: read watchpoints shouldn't fire if
2680 the value has changed. This is for targets which
2681 cannot set read-only watchpoints. */
2682 bs
->print_it
= print_it_noop
;
2688 case WP_VALUE_NOT_CHANGED
:
2695 /* Error from catch_errors. */
2696 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2697 if (b
->related_breakpoint
)
2698 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2699 b
->disposition
= disp_del_at_next_stop
;
2700 /* We've already printed what needs to be printed. */
2701 bs
->print_it
= print_it_done
;
2704 else /* found == 0 */
2706 /* This is a case where some watchpoint(s) triggered,
2707 but not at the address of this watchpoint (FOUND
2708 was left zero). So don't print anything for this
2710 bs
->print_it
= print_it_noop
;
2717 /* By definition, an encountered breakpoint is a triggered
2721 real_breakpoint
= 1;
2724 if (frame_id_p (b
->frame_id
)
2725 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2729 int value_is_zero
= 0;
2733 /* Need to select the frame, with all that implies
2734 so that the conditions will have the right context. */
2735 select_frame (get_current_frame ());
2737 = catch_errors (breakpoint_cond_eval
, (b
->cond
),
2738 "Error in testing breakpoint condition:\n",
2740 /* FIXME-someday, should give breakpoint # */
2743 if (b
->cond
&& value_is_zero
)
2746 /* Don't consider this a hit. */
2749 else if (b
->ignore_count
> 0)
2752 annotate_ignore_count_change ();
2757 /* We will stop here */
2758 if (b
->disposition
== disp_disable
)
2759 b
->enable_state
= bp_disabled
;
2760 bs
->commands
= copy_command_lines (b
->commands
);
2764 (STREQ ("silent", bs
->commands
->line
) ||
2765 (xdb_commands
&& STREQ ("Q", bs
->commands
->line
))))
2767 bs
->commands
= bs
->commands
->next
;
2772 /* Print nothing for this entry if we dont stop or if we dont print. */
2773 if (bs
->stop
== 0 || bs
->print
== 0)
2774 bs
->print_it
= print_it_noop
;
2777 bs
->next
= NULL
; /* Terminate the chain */
2778 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2780 if (real_breakpoint
&& bs
)
2782 if (bs
->breakpoint_at
->type
== bp_hardware_breakpoint
)
2784 if (DECR_PC_AFTER_HW_BREAK
!= 0)
2786 *pc
= *pc
- DECR_PC_AFTER_HW_BREAK
;
2792 if (DECR_PC_AFTER_BREAK
!= 0 || must_shift_inst_regs
)
2795 #if defined (SHIFT_INST_REGS)
2797 #else /* No SHIFT_INST_REGS. */
2799 #endif /* No SHIFT_INST_REGS. */
2804 /* The value of a hardware watchpoint hasn't changed, but the
2805 intermediate memory locations we are watching may have. */
2806 if (bs
&& !bs
->stop
&&
2807 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2808 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2809 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2811 remove_breakpoints ();
2812 insert_breakpoints ();
2817 /* Tell what to do about this bpstat. */
2819 bpstat_what (bpstat bs
)
2821 /* Classify each bpstat as one of the following. */
2824 /* This bpstat element has no effect on the main_action. */
2827 /* There was a watchpoint, stop but don't print. */
2830 /* There was a watchpoint, stop and print. */
2833 /* There was a breakpoint but we're not stopping. */
2836 /* There was a breakpoint, stop but don't print. */
2839 /* There was a breakpoint, stop and print. */
2842 /* We hit the longjmp breakpoint. */
2845 /* We hit the longjmp_resume breakpoint. */
2848 /* We hit the step_resume breakpoint. */
2851 /* We hit the through_sigtramp breakpoint. */
2854 /* We hit the shared library event breakpoint. */
2857 /* We caught a shared library event. */
2860 /* This is just used to count how many enums there are. */
2864 /* Here is the table which drives this routine. So that we can
2865 format it pretty, we define some abbreviations for the
2866 enum bpstat_what codes. */
2867 #define kc BPSTAT_WHAT_KEEP_CHECKING
2868 #define ss BPSTAT_WHAT_STOP_SILENT
2869 #define sn BPSTAT_WHAT_STOP_NOISY
2870 #define sgl BPSTAT_WHAT_SINGLE
2871 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2872 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2873 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2874 #define sr BPSTAT_WHAT_STEP_RESUME
2875 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2876 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2877 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2879 /* "Can't happen." Might want to print an error message.
2880 abort() is not out of the question, but chances are GDB is just
2881 a bit confused, not unusable. */
2882 #define err BPSTAT_WHAT_STOP_NOISY
2884 /* Given an old action and a class, come up with a new action. */
2885 /* One interesting property of this table is that wp_silent is the same
2886 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2887 after stopping, the check for whether to step over a breakpoint
2888 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2889 reference to how we stopped. We retain separate wp_silent and
2890 bp_silent codes in case we want to change that someday.
2892 Another possibly interesting property of this table is that
2893 there's a partial ordering, priority-like, of the actions. Once
2894 you've decided that some action is appropriate, you'll never go
2895 back and decide something of a lower priority is better. The
2898 kc < clr sgl shl shlr slr sn sr ss ts
2899 sgl < clrs shl shlr slr sn sr ss ts
2900 slr < err shl shlr sn sr ss ts
2901 clr < clrs err shl shlr sn sr ss ts
2902 clrs < err shl shlr sn sr ss ts
2903 ss < shl shlr sn sr ts
2910 What I think this means is that we don't need a damned table
2911 here. If you just put the rows and columns in the right order,
2912 it'd look awfully regular. We could simply walk the bpstat list
2913 and choose the highest priority action we find, with a little
2914 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
2915 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
2916 is messy anyway). */
2918 /* step_resume entries: a step resume breakpoint overrides another
2919 breakpoint of signal handling (see comment in wait_for_inferior
2920 at first PC_IN_SIGTRAMP where we set the step_resume breakpoint). */
2921 /* We handle the through_sigtramp_breakpoint the same way; having both
2922 one of those and a step_resume_breakpoint is probably very rare (?). */
2924 static const enum bpstat_what_main_action
2925 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
2928 /* kc ss sn sgl slr clr clrs sr ts shl shlr
2931 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, ts
, shl
, shlr
},
2933 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
2935 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
2937 {sgl
, ss
, sn
, sgl
, slr
, clrs
, 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 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, ts
, shl
, shlr
},
2945 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, ts
, shl
, shlr
},
2947 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, ts
, shl
, shlr
},
2949 {ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, shl
, shlr
},
2951 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, shl
, ts
, shl
, shlr
},
2953 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, ts
, shlr
, shlr
}
2968 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
2969 struct bpstat_what retval
;
2971 retval
.call_dummy
= 0;
2972 for (; bs
!= NULL
; bs
= bs
->next
)
2974 enum class bs_class
= no_effect
;
2975 if (bs
->breakpoint_at
== NULL
)
2976 /* I suspect this can happen if it was a momentary breakpoint
2977 which has since been deleted. */
2979 switch (bs
->breakpoint_at
->type
)
2985 case bp_hardware_breakpoint
:
2991 bs_class
= bp_noisy
;
2993 bs_class
= bp_silent
;
2996 bs_class
= bp_nostop
;
2999 case bp_hardware_watchpoint
:
3000 case bp_read_watchpoint
:
3001 case bp_access_watchpoint
:
3005 bs_class
= wp_noisy
;
3007 bs_class
= wp_silent
;
3010 /* There was a watchpoint, but we're not stopping.
3011 This requires no further action. */
3012 bs_class
= no_effect
;
3015 bs_class
= long_jump
;
3017 case bp_longjmp_resume
:
3018 bs_class
= long_resume
;
3020 case bp_step_resume
:
3023 bs_class
= step_resume
;
3026 /* It is for the wrong frame. */
3027 bs_class
= bp_nostop
;
3029 case bp_through_sigtramp
:
3030 bs_class
= through_sig
;
3032 case bp_watchpoint_scope
:
3033 bs_class
= bp_nostop
;
3035 case bp_shlib_event
:
3036 bs_class
= shlib_event
;
3038 case bp_thread_event
:
3039 case bp_overlay_event
:
3040 bs_class
= bp_nostop
;
3043 case bp_catch_unload
:
3044 /* Only if this catchpoint triggered should we cause the
3045 step-out-of-dld behaviour. Otherwise, we ignore this
3048 bs_class
= catch_shlib_event
;
3050 bs_class
= no_effect
;
3053 case bp_catch_vfork
:
3058 bs_class
= bp_noisy
;
3060 bs_class
= bp_silent
;
3063 /* There was a catchpoint, but we're not stopping.
3064 This requires no further action. */
3065 bs_class
= no_effect
;
3067 case bp_catch_catch
:
3068 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
3069 bs_class
= bp_nostop
;
3071 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3073 case bp_catch_throw
:
3074 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
3075 bs_class
= bp_nostop
;
3077 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3080 /* Make sure the action is stop (silent or noisy),
3081 so infrun.c pops the dummy frame. */
3082 bs_class
= bp_silent
;
3083 retval
.call_dummy
= 1;
3086 current_action
= table
[(int) bs_class
][(int) current_action
];
3088 retval
.main_action
= current_action
;
3092 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3093 without hardware support). This isn't related to a specific bpstat,
3094 just to things like whether watchpoints are set. */
3097 bpstat_should_step (void)
3099 struct breakpoint
*b
;
3101 if (b
->enable_state
== bp_enabled
&& b
->type
== bp_watchpoint
)
3106 /* Nonzero if there are enabled hardware watchpoints. */
3108 bpstat_have_active_hw_watchpoints (void)
3110 struct breakpoint
*b
;
3112 if ((b
->enable_state
== bp_enabled
) &&
3114 ((b
->type
== bp_hardware_watchpoint
) ||
3115 (b
->type
== bp_read_watchpoint
) ||
3116 (b
->type
== bp_access_watchpoint
)))
3122 /* Given a bpstat that records zero or more triggered eventpoints, this
3123 function returns another bpstat which contains only the catchpoints
3124 on that first list, if any. */
3126 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3128 struct bpstats root_bs
[1];
3129 bpstat bs
= root_bs
;
3130 struct breakpoint
*ep
;
3133 bpstat_clear (cp_list
);
3134 root_bs
->next
= NULL
;
3136 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3138 /* Is this eventpoint a catchpoint? If not, ignore it. */
3139 ep
= ep_list
->breakpoint_at
;
3142 if ((ep
->type
!= bp_catch_load
) &&
3143 (ep
->type
!= bp_catch_unload
) &&
3144 (ep
->type
!= bp_catch_catch
) &&
3145 (ep
->type
!= bp_catch_throw
))
3146 /* pai: (temp) ADD fork/vfork here!! */
3149 /* Yes; add it to the list. */
3150 bs
= bpstat_alloc (ep
, bs
);
3155 #if defined(SOLIB_ADD)
3156 /* Also, for each triggered catchpoint, tag it with the name of
3157 the library that caused this trigger. (We copy the name now,
3158 because it's only guaranteed to be available NOW, when the
3159 catchpoint triggers. Clients who may wish to know the name
3160 later must get it from the catchpoint itself.) */
3161 if (ep
->triggered_dll_pathname
!= NULL
)
3162 xfree (ep
->triggered_dll_pathname
);
3163 if (ep
->type
== bp_catch_load
)
3164 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3165 PIDGET (inferior_ptid
));
3167 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3168 PIDGET (inferior_ptid
));
3170 dll_pathname
= NULL
;
3174 ep
->triggered_dll_pathname
= (char *)
3175 xmalloc (strlen (dll_pathname
) + 1);
3176 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3179 ep
->triggered_dll_pathname
= NULL
;
3185 /* Print B to gdb_stdout. */
3187 print_one_breakpoint (struct breakpoint
*b
,
3188 CORE_ADDR
*last_addr
)
3190 register struct command_line
*l
;
3191 register struct symbol
*sym
;
3192 struct ep_type_description
3197 static struct ep_type_description bptypes
[] =
3199 {bp_none
, "?deleted?"},
3200 {bp_breakpoint
, "breakpoint"},
3201 {bp_hardware_breakpoint
, "hw breakpoint"},
3202 {bp_until
, "until"},
3203 {bp_finish
, "finish"},
3204 {bp_watchpoint
, "watchpoint"},
3205 {bp_hardware_watchpoint
, "hw watchpoint"},
3206 {bp_read_watchpoint
, "read watchpoint"},
3207 {bp_access_watchpoint
, "acc watchpoint"},
3208 {bp_longjmp
, "longjmp"},
3209 {bp_longjmp_resume
, "longjmp resume"},
3210 {bp_step_resume
, "step resume"},
3211 {bp_through_sigtramp
, "sigtramp"},
3212 {bp_watchpoint_scope
, "watchpoint scope"},
3213 {bp_call_dummy
, "call dummy"},
3214 {bp_shlib_event
, "shlib events"},
3215 {bp_thread_event
, "thread events"},
3216 {bp_overlay_event
, "overlay events"},
3217 {bp_catch_load
, "catch load"},
3218 {bp_catch_unload
, "catch unload"},
3219 {bp_catch_fork
, "catch fork"},
3220 {bp_catch_vfork
, "catch vfork"},
3221 {bp_catch_exec
, "catch exec"},
3222 {bp_catch_catch
, "catch catch"},
3223 {bp_catch_throw
, "catch throw"}
3226 static char *bpdisps
[] =
3227 {"del", "dstp", "dis", "keep"};
3228 static char bpenables
[] = "nynny";
3229 char wrap_indent
[80];
3230 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3231 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3234 ui_out_tuple_begin (uiout
, "bkpt");
3238 ui_out_field_int (uiout
, "number", b
->number
);
3242 if (((int) b
->type
> (sizeof (bptypes
) / sizeof (bptypes
[0])))
3243 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3244 internal_error (__FILE__
, __LINE__
,
3245 "bptypes table does not describe type #%d.",
3247 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3251 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3255 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3256 ui_out_spaces (uiout
, 2);
3259 strcpy (wrap_indent
, " ");
3262 if (TARGET_ADDR_BIT
<= 32)
3263 strcat (wrap_indent
, " ");
3265 strcat (wrap_indent
, " ");
3270 internal_error (__FILE__
, __LINE__
,
3271 "print_one_breakpoint: bp_none encountered\n");
3275 case bp_hardware_watchpoint
:
3276 case bp_read_watchpoint
:
3277 case bp_access_watchpoint
:
3278 /* Field 4, the address, is omitted (which makes the columns
3279 not line up too nicely with the headers, but the effect
3280 is relatively readable). */
3282 ui_out_field_skip (uiout
, "addr");
3284 print_expression (b
->exp
, stb
->stream
);
3285 ui_out_field_stream (uiout
, "what", stb
);
3289 case bp_catch_unload
:
3290 /* Field 4, the address, is omitted (which makes the columns
3291 not line up too nicely with the headers, but the effect
3292 is relatively readable). */
3294 ui_out_field_skip (uiout
, "addr");
3296 if (b
->dll_pathname
== NULL
)
3298 ui_out_field_string (uiout
, "what", "<any library>");
3299 ui_out_spaces (uiout
, 1);
3303 ui_out_text (uiout
, "library \"");
3304 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3305 ui_out_text (uiout
, "\" ");
3310 case bp_catch_vfork
:
3311 /* Field 4, the address, is omitted (which makes the columns
3312 not line up too nicely with the headers, but the effect
3313 is relatively readable). */
3315 ui_out_field_skip (uiout
, "addr");
3317 if (b
->forked_inferior_pid
!= 0)
3319 ui_out_text (uiout
, "process ");
3320 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3321 ui_out_spaces (uiout
, 1);
3325 /* Field 4, the address, is omitted (which makes the columns
3326 not line up too nicely with the headers, but the effect
3327 is relatively readable). */
3329 ui_out_field_skip (uiout
, "addr");
3331 if (b
->exec_pathname
!= NULL
)
3333 ui_out_text (uiout
, "program \"");
3334 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3335 ui_out_text (uiout
, "\" ");
3339 case bp_catch_catch
:
3340 /* Field 4, the address, is omitted (which makes the columns
3341 not line up too nicely with the headers, but the effect
3342 is relatively readable). */
3344 ui_out_field_skip (uiout
, "addr");
3346 ui_out_field_string (uiout
, "what", "exception catch");
3347 ui_out_spaces (uiout
, 1);
3350 case bp_catch_throw
:
3351 /* Field 4, the address, is omitted (which makes the columns
3352 not line up too nicely with the headers, but the effect
3353 is relatively readable). */
3355 ui_out_field_skip (uiout
, "addr");
3357 ui_out_field_string (uiout
, "what", "exception throw");
3358 ui_out_spaces (uiout
, 1);
3362 case bp_hardware_breakpoint
:
3366 case bp_longjmp_resume
:
3367 case bp_step_resume
:
3368 case bp_through_sigtramp
:
3369 case bp_watchpoint_scope
:
3371 case bp_shlib_event
:
3372 case bp_thread_event
:
3373 case bp_overlay_event
:
3377 ui_out_field_core_addr (uiout
, "addr", b
->address
);
3380 *last_addr
= b
->address
;
3383 sym
= find_pc_sect_function (b
->address
, b
->section
);
3386 ui_out_text (uiout
, "in ");
3387 ui_out_field_string (uiout
, "func",
3388 SYMBOL_SOURCE_NAME (sym
));
3389 ui_out_wrap_hint (uiout
, wrap_indent
);
3390 ui_out_text (uiout
, " at ");
3392 ui_out_field_string (uiout
, "file", b
->source_file
);
3393 ui_out_text (uiout
, ":");
3394 ui_out_field_int (uiout
, "line", b
->line_number
);
3398 print_address_symbolic (b
->address
, stb
->stream
, demangle
, "");
3399 ui_out_field_stream (uiout
, "at", stb
);
3404 if (b
->thread
!= -1)
3406 /* FIXME: This seems to be redundant and lost here; see the
3407 "stop only in" line a little further down. */
3408 ui_out_text (uiout
, " thread ");
3409 ui_out_field_int (uiout
, "thread", b
->thread
);
3412 ui_out_text (uiout
, "\n");
3414 if (frame_id_p (b
->frame_id
))
3417 ui_out_text (uiout
, "\tstop only in stack frame at ");
3418 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3420 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.base
);
3421 ui_out_text (uiout
, "\n");
3427 ui_out_text (uiout
, "\tstop only if ");
3428 print_expression (b
->cond
, stb
->stream
);
3429 ui_out_field_stream (uiout
, "cond", stb
);
3430 ui_out_text (uiout
, "\n");
3433 if (b
->thread
!= -1)
3435 /* FIXME should make an annotation for this */
3436 ui_out_text (uiout
, "\tstop only in thread ");
3437 ui_out_field_int (uiout
, "thread", b
->thread
);
3438 ui_out_text (uiout
, "\n");
3441 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3443 /* FIXME should make an annotation for this */
3444 if (ep_is_catchpoint (b
))
3445 ui_out_text (uiout
, "\tcatchpoint");
3447 ui_out_text (uiout
, "\tbreakpoint");
3448 ui_out_text (uiout
, " already hit ");
3449 ui_out_field_int (uiout
, "times", b
->hit_count
);
3450 if (b
->hit_count
== 1)
3451 ui_out_text (uiout
, " time\n");
3453 ui_out_text (uiout
, " times\n");
3456 /* Output the count also if it is zero, but only if this is
3457 mi. FIXME: Should have a better test for this. */
3458 if (ui_out_is_mi_like_p (uiout
))
3459 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3460 ui_out_field_int (uiout
, "times", b
->hit_count
);
3462 if (b
->ignore_count
)
3465 ui_out_text (uiout
, "\tignore next ");
3466 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3467 ui_out_text (uiout
, " hits\n");
3470 if ((l
= b
->commands
))
3473 ui_out_tuple_begin (uiout
, "script");
3474 print_command_lines (uiout
, l
, 4);
3475 ui_out_tuple_end (uiout
);
3477 ui_out_tuple_end (uiout
);
3478 do_cleanups (old_chain
);
3481 struct captured_breakpoint_query_args
3487 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3489 struct captured_breakpoint_query_args
*args
= data
;
3490 register struct breakpoint
*b
;
3491 CORE_ADDR dummy_addr
= 0;
3494 if (args
->bnum
== b
->number
)
3496 print_one_breakpoint (b
, &dummy_addr
);
3504 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
)
3506 struct captured_breakpoint_query_args args
;
3508 /* For the moment we don't trust print_one_breakpoint() to not throw
3510 return catch_exceptions (uiout
, do_captured_breakpoint_query
, &args
,
3511 NULL
, RETURN_MASK_ALL
);
3514 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3515 catchpoints, et.al.). */
3518 user_settable_breakpoint (const struct breakpoint
*b
)
3520 return (b
->type
== bp_breakpoint
3521 || b
->type
== bp_catch_load
3522 || b
->type
== bp_catch_unload
3523 || b
->type
== bp_catch_fork
3524 || b
->type
== bp_catch_vfork
3525 || b
->type
== bp_catch_exec
3526 || b
->type
== bp_catch_catch
3527 || b
->type
== bp_catch_throw
3528 || b
->type
== bp_hardware_breakpoint
3529 || b
->type
== bp_watchpoint
3530 || b
->type
== bp_read_watchpoint
3531 || b
->type
== bp_access_watchpoint
3532 || b
->type
== bp_hardware_watchpoint
);
3535 /* Print information on user settable breakpoint (watchpoint, etc)
3536 number BNUM. If BNUM is -1 print all user settable breakpoints.
3537 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3540 breakpoint_1 (int bnum
, int allflag
)
3542 register struct breakpoint
*b
;
3543 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3544 int nr_printable_breakpoints
;
3546 /* Compute the number of rows in the table. */
3547 nr_printable_breakpoints
= 0;
3550 || bnum
== b
->number
)
3552 if (allflag
|| user_settable_breakpoint (b
))
3553 nr_printable_breakpoints
++;
3557 ui_out_table_begin (uiout
, 6, nr_printable_breakpoints
, "BreakpointTable");
3559 ui_out_table_begin (uiout
, 5, nr_printable_breakpoints
, "BreakpointTable");
3561 if (nr_printable_breakpoints
> 0)
3562 annotate_breakpoints_headers ();
3563 if (nr_printable_breakpoints
> 0)
3565 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3566 if (nr_printable_breakpoints
> 0)
3568 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3569 if (nr_printable_breakpoints
> 0)
3571 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3572 if (nr_printable_breakpoints
> 0)
3574 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3577 if (nr_printable_breakpoints
> 0)
3579 if (TARGET_ADDR_BIT
<= 32)
3580 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3582 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3584 if (nr_printable_breakpoints
> 0)
3586 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3587 ui_out_table_body (uiout
);
3588 if (nr_printable_breakpoints
> 0)
3589 annotate_breakpoints_table ();
3593 || bnum
== b
->number
)
3595 /* We only print out user settable breakpoints unless the
3597 if (allflag
|| user_settable_breakpoint (b
))
3598 print_one_breakpoint (b
, &last_addr
);
3601 ui_out_table_end (uiout
);
3603 if (nr_printable_breakpoints
== 0)
3606 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3608 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3613 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3614 that a comparison of an unsigned with -1 is always false. */
3615 if (last_addr
!= (CORE_ADDR
) -1)
3616 set_next_address (last_addr
);
3619 /* FIXME? Should this be moved up so that it is only called when
3620 there have been breakpoints? */
3621 annotate_breakpoints_table_end ();
3626 breakpoints_info (char *bnum_exp
, int from_tty
)
3631 bnum
= parse_and_eval_long (bnum_exp
);
3633 breakpoint_1 (bnum
, 0);
3638 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3643 bnum
= parse_and_eval_long (bnum_exp
);
3645 breakpoint_1 (bnum
, 1);
3648 /* Print a message describing any breakpoints set at PC. */
3651 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
)
3653 register int others
= 0;
3654 register struct breakpoint
*b
;
3657 if (b
->address
== pc
) /* address match / overlay match */
3658 if (!overlay_debugging
|| b
->section
== section
)
3662 printf_filtered ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
3664 if (b
->address
== pc
) /* address match / overlay match */
3665 if (!overlay_debugging
|| b
->section
== section
)
3668 printf_filtered ("%d%s%s ",
3670 ((b
->enable_state
== bp_disabled
||
3671 b
->enable_state
== bp_shlib_disabled
||
3672 b
->enable_state
== bp_call_disabled
)
3674 : b
->enable_state
== bp_permanent
3678 : ((others
== 1) ? " and" : ""));
3680 printf_filtered ("also set at pc ");
3681 print_address_numeric (pc
, 1, gdb_stdout
);
3682 printf_filtered (".\n");
3686 /* Set the default place to put a breakpoint
3687 for the `break' command with no arguments. */
3690 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3693 default_breakpoint_valid
= valid
;
3694 default_breakpoint_address
= addr
;
3695 default_breakpoint_symtab
= symtab
;
3696 default_breakpoint_line
= line
;
3699 /* Return true iff it is meaningful to use the address member of
3700 BPT. For some breakpoint types, the address member is irrelevant
3701 and it makes no sense to attempt to compare it to other addresses
3702 (or use it for any other purpose either).
3704 More specifically, each of the following breakpoint types will always
3705 have a zero valued address and we don't want check_duplicates() to mark
3706 breakpoints of any of these types to be a duplicate of an actual
3707 breakpoint at address zero:
3710 bp_hardware_watchpoint
3712 bp_access_watchpoint
3719 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3721 enum bptype type
= bpt
->type
;
3723 return (type
!= bp_watchpoint
3724 && type
!= bp_hardware_watchpoint
3725 && type
!= bp_read_watchpoint
3726 && type
!= bp_access_watchpoint
3727 && type
!= bp_catch_exec
3728 && type
!= bp_longjmp_resume
3729 && type
!= bp_catch_fork
3730 && type
!= bp_catch_vfork
);
3733 /* Rescan breakpoints at the same address and section as BPT,
3734 marking the first one as "first" and any others as "duplicates".
3735 This is so that the bpt instruction is only inserted once.
3736 If we have a permanent breakpoint at the same place as BPT, make
3737 that one the official one, and the rest as duplicates. */
3740 check_duplicates (struct breakpoint
*bpt
)
3742 register struct breakpoint
*b
;
3743 register int count
= 0;
3744 struct breakpoint
*perm_bp
= 0;
3745 CORE_ADDR address
= bpt
->address
;
3746 asection
*section
= bpt
->section
;
3748 if (! breakpoint_address_is_meaningful (bpt
))
3752 if (b
->enable_state
!= bp_disabled
3753 && b
->enable_state
!= bp_shlib_disabled
3754 && b
->enable_state
!= bp_call_disabled
3755 && b
->address
== address
/* address / overlay match */
3756 && (!overlay_debugging
|| b
->section
== section
)
3757 && breakpoint_address_is_meaningful (b
))
3759 /* Have we found a permanent breakpoint? */
3760 if (b
->enable_state
== bp_permanent
)
3767 b
->duplicate
= count
> 1;
3770 /* If we found a permanent breakpoint at this address, go over the
3771 list again and declare all the other breakpoints there to be the
3775 perm_bp
->duplicate
= 0;
3777 /* Permanent breakpoint should always be inserted. */
3778 if (! perm_bp
->inserted
)
3779 internal_error (__FILE__
, __LINE__
,
3780 "allegedly permanent breakpoint is not "
3781 "actually inserted");
3787 internal_error (__FILE__
, __LINE__
,
3788 "another breakpoint was inserted on top of "
3789 "a permanent breakpoint");
3791 if (b
->enable_state
!= bp_disabled
3792 && b
->enable_state
!= bp_shlib_disabled
3793 && b
->enable_state
!= bp_call_disabled
3794 && b
->address
== address
/* address / overlay match */
3795 && (!overlay_debugging
|| b
->section
== section
)
3796 && breakpoint_address_is_meaningful (b
))
3802 /* set_raw_breakpoint() is a low level routine for allocating and
3803 partially initializing a breakpoint of type BPTYPE. The newly
3804 created breakpoint's address, section, source file name, and line
3805 number are provided by SAL. The newly created and partially
3806 initialized breakpoint is added to the breakpoint chain and
3807 is also returned as the value of this function.
3809 It is expected that the caller will complete the initialization of
3810 the newly created breakpoint struct as well as output any status
3811 information regarding the creation of a new breakpoint. In
3812 particular, set_raw_breakpoint() does NOT set the breakpoint
3813 number! Care should be taken to not allow an error() to occur
3814 prior to completing the initialization of the breakpoint. If this
3815 should happen, a bogus breakpoint will be left on the chain. */
3818 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
3820 register struct breakpoint
*b
, *b1
;
3822 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
3823 memset (b
, 0, sizeof (*b
));
3824 b
->address
= sal
.pc
;
3825 if (sal
.symtab
== NULL
)
3826 b
->source_file
= NULL
;
3828 b
->source_file
= savestring (sal
.symtab
->filename
,
3829 strlen (sal
.symtab
->filename
));
3830 b
->section
= sal
.section
;
3832 b
->language
= current_language
->la_language
;
3833 b
->input_radix
= input_radix
;
3835 b
->line_number
= sal
.line
;
3836 b
->enable_state
= bp_enabled
;
3839 b
->ignore_count
= 0;
3841 b
->frame_id
= null_frame_id
;
3842 b
->dll_pathname
= NULL
;
3843 b
->triggered_dll_pathname
= NULL
;
3844 b
->forked_inferior_pid
= 0;
3845 b
->exec_pathname
= NULL
;
3847 /* Add this breakpoint to the end of the chain
3848 so that a list of breakpoints will come out in order
3849 of increasing numbers. */
3851 b1
= breakpoint_chain
;
3853 breakpoint_chain
= b
;
3861 check_duplicates (b
);
3862 breakpoints_changed ();
3868 /* Note that the breakpoint object B describes a permanent breakpoint
3869 instruction, hard-wired into the inferior's code. */
3871 make_breakpoint_permanent (struct breakpoint
*b
)
3873 b
->enable_state
= bp_permanent
;
3875 /* By definition, permanent breakpoints are already present in the code. */
3879 static struct breakpoint
*
3880 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
3882 static int internal_breakpoint_number
= -1;
3883 struct symtab_and_line sal
;
3884 struct breakpoint
*b
;
3886 init_sal (&sal
); /* initialize to zeroes */
3889 sal
.section
= find_pc_overlay (sal
.pc
);
3891 b
= set_raw_breakpoint (sal
, type
);
3892 b
->number
= internal_breakpoint_number
--;
3893 b
->disposition
= disp_donttouch
;
3900 create_longjmp_breakpoint (char *func_name
)
3902 struct breakpoint
*b
;
3903 struct minimal_symbol
*m
;
3905 if (func_name
== NULL
)
3906 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
3909 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
, NULL
)) == NULL
)
3912 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
3915 b
->enable_state
= bp_disabled
;
3918 b
->addr_string
= xstrdup (func_name
);
3921 /* Call this routine when stepping and nexting to enable a breakpoint
3922 if we do a longjmp(). When we hit that breakpoint, call
3923 set_longjmp_resume_breakpoint() to figure out where we are going. */
3926 enable_longjmp_breakpoint (void)
3928 register struct breakpoint
*b
;
3931 if (b
->type
== bp_longjmp
)
3933 b
->enable_state
= bp_enabled
;
3934 check_duplicates (b
);
3939 disable_longjmp_breakpoint (void)
3941 register struct breakpoint
*b
;
3944 if (b
->type
== bp_longjmp
3945 || b
->type
== bp_longjmp_resume
)
3947 b
->enable_state
= bp_disabled
;
3948 check_duplicates (b
);
3953 create_overlay_event_breakpoint (char *func_name
)
3955 struct breakpoint
*b
;
3956 struct minimal_symbol
*m
;
3958 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
, NULL
)) == NULL
)
3961 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
3963 b
->addr_string
= xstrdup (func_name
);
3965 if (overlay_debugging
== ovly_auto
)
3967 b
->enable_state
= bp_enabled
;
3968 overlay_events_enabled
= 1;
3972 b
->enable_state
= bp_disabled
;
3973 overlay_events_enabled
= 0;
3978 enable_overlay_breakpoints (void)
3980 register struct breakpoint
*b
;
3983 if (b
->type
== bp_overlay_event
)
3985 b
->enable_state
= bp_enabled
;
3986 check_duplicates (b
);
3987 overlay_events_enabled
= 1;
3992 disable_overlay_breakpoints (void)
3994 register struct breakpoint
*b
;
3997 if (b
->type
== bp_overlay_event
)
3999 b
->enable_state
= bp_disabled
;
4000 check_duplicates (b
);
4001 overlay_events_enabled
= 0;
4006 create_thread_event_breakpoint (CORE_ADDR address
)
4008 struct breakpoint
*b
;
4010 b
= create_internal_breakpoint (address
, bp_thread_event
);
4012 b
->enable_state
= bp_enabled
;
4013 /* addr_string has to be used or breakpoint_re_set will delete me. */
4014 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->address
));
4020 remove_thread_event_breakpoints (void)
4022 struct breakpoint
*b
, *temp
;
4024 ALL_BREAKPOINTS_SAFE (b
, temp
)
4025 if (b
->type
== bp_thread_event
)
4026 delete_breakpoint (b
);
4031 remove_solib_event_breakpoints (void)
4033 register struct breakpoint
*b
, *temp
;
4035 ALL_BREAKPOINTS_SAFE (b
, temp
)
4036 if (b
->type
== bp_shlib_event
)
4037 delete_breakpoint (b
);
4041 create_solib_event_breakpoint (CORE_ADDR address
)
4043 struct breakpoint
*b
;
4045 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4049 /* Disable any breakpoints that are on code in shared libraries. Only
4050 apply to enabled breakpoints, disabled ones can just stay disabled. */
4053 disable_breakpoints_in_shlibs (int silent
)
4055 struct breakpoint
*b
;
4056 int disabled_shlib_breaks
= 0;
4058 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4061 #if defined (PC_SOLIB)
4062 if (((b
->type
== bp_breakpoint
) ||
4063 (b
->type
== bp_hardware_breakpoint
)) &&
4064 b
->enable_state
== bp_enabled
&&
4066 PC_SOLIB (b
->address
))
4068 b
->enable_state
= bp_shlib_disabled
;
4071 if (!disabled_shlib_breaks
)
4073 target_terminal_ours_for_output ();
4074 warning ("Temporarily disabling shared library breakpoints:");
4076 disabled_shlib_breaks
= 1;
4077 warning ("breakpoint #%d ", b
->number
);
4084 /* Try to reenable any breakpoints in shared libraries. */
4086 re_enable_breakpoints_in_shlibs (void)
4088 struct breakpoint
*b
;
4091 if (b
->enable_state
== bp_shlib_disabled
)
4095 /* Do not reenable the breakpoint if the shared library
4096 is still not mapped in. */
4097 if (target_read_memory (b
->address
, buf
, 1) == 0)
4098 b
->enable_state
= bp_enabled
;
4105 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
4106 char *cond_string
, enum bptype bp_kind
)
4108 struct breakpoint
*b
;
4109 struct symtabs_and_lines sals
;
4110 struct cleanup
*old_chain
;
4111 struct cleanup
*canonical_strings_chain
= NULL
;
4112 char *addr_start
= hookname
;
4113 char *addr_end
= NULL
;
4114 char **canonical
= (char **) NULL
;
4115 int thread
= -1; /* All threads. */
4117 /* Set a breakpoint on the specified hook. */
4118 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
, 0, &canonical
);
4119 addr_end
= hookname
;
4121 if (sals
.nelts
== 0)
4123 warning ("Unable to set a breakpoint on dynamic linker callback.");
4124 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4125 warning ("GDB will be unable to track shl_load/shl_unload calls");
4128 if (sals
.nelts
!= 1)
4130 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4131 warning ("GDB will be unable to track shl_load/shl_unload calls");
4135 /* Make sure that all storage allocated in decode_line_1 gets freed
4136 in case the following errors out. */
4137 old_chain
= make_cleanup (xfree
, sals
.sals
);
4138 if (canonical
!= (char **) NULL
)
4140 make_cleanup (xfree
, canonical
);
4141 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
4142 if (canonical
[0] != NULL
)
4143 make_cleanup (xfree
, canonical
[0]);
4146 resolve_sal_pc (&sals
.sals
[0]);
4148 /* Remove the canonical strings from the cleanup, they are needed below. */
4149 if (canonical
!= (char **) NULL
)
4150 discard_cleanups (canonical_strings_chain
);
4152 b
= set_raw_breakpoint (sals
.sals
[0], bp_kind
);
4153 set_breakpoint_count (breakpoint_count
+ 1);
4154 b
->number
= breakpoint_count
;
4156 b
->cond_string
= (cond_string
== NULL
) ?
4157 NULL
: savestring (cond_string
, strlen (cond_string
));
4160 if (canonical
!= (char **) NULL
&& canonical
[0] != NULL
)
4161 b
->addr_string
= canonical
[0];
4162 else if (addr_start
)
4163 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
4165 b
->enable_state
= bp_enabled
;
4166 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4168 if (dll_pathname
== NULL
)
4169 b
->dll_pathname
= NULL
;
4172 b
->dll_pathname
= (char *) xmalloc (strlen (dll_pathname
) + 1);
4173 strcpy (b
->dll_pathname
, dll_pathname
);
4177 do_cleanups (old_chain
);
4181 create_solib_load_event_breakpoint (char *hookname
, int tempflag
,
4182 char *dll_pathname
, char *cond_string
)
4184 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4185 cond_string
, bp_catch_load
);
4189 create_solib_unload_event_breakpoint (char *hookname
, int tempflag
,
4190 char *dll_pathname
, char *cond_string
)
4192 solib_load_unload_1 (hookname
,tempflag
, dll_pathname
,
4193 cond_string
, bp_catch_unload
);
4197 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4198 enum bptype bp_kind
)
4200 struct symtab_and_line sal
;
4201 struct breakpoint
*b
;
4202 int thread
= -1; /* All threads. */
4209 b
= set_raw_breakpoint (sal
, bp_kind
);
4210 set_breakpoint_count (breakpoint_count
+ 1);
4211 b
->number
= breakpoint_count
;
4213 b
->cond_string
= (cond_string
== NULL
) ?
4214 NULL
: savestring (cond_string
, strlen (cond_string
));
4216 b
->addr_string
= NULL
;
4217 b
->enable_state
= bp_enabled
;
4218 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4219 b
->forked_inferior_pid
= 0;
4225 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4227 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4231 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4233 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4237 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4239 struct symtab_and_line sal
;
4240 struct breakpoint
*b
;
4241 int thread
= -1; /* All threads. */
4248 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4249 set_breakpoint_count (breakpoint_count
+ 1);
4250 b
->number
= breakpoint_count
;
4252 b
->cond_string
= (cond_string
== NULL
) ?
4253 NULL
: savestring (cond_string
, strlen (cond_string
));
4255 b
->addr_string
= NULL
;
4256 b
->enable_state
= bp_enabled
;
4257 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4263 hw_breakpoint_used_count (void)
4265 register struct breakpoint
*b
;
4270 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4278 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4280 register struct breakpoint
*b
;
4283 *other_type_used
= 0;
4286 if (b
->enable_state
== bp_enabled
)
4288 if (b
->type
== type
)
4290 else if ((b
->type
== bp_hardware_watchpoint
||
4291 b
->type
== bp_read_watchpoint
||
4292 b
->type
== bp_access_watchpoint
)
4293 && b
->enable_state
== bp_enabled
)
4294 *other_type_used
= 1;
4300 /* Call this after hitting the longjmp() breakpoint. Use this to set
4301 a new breakpoint at the target of the jmp_buf.
4303 FIXME - This ought to be done by setting a temporary breakpoint
4304 that gets deleted automatically... */
4307 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_id frame_id
)
4309 register struct breakpoint
*b
;
4312 if (b
->type
== bp_longjmp_resume
)
4315 b
->enable_state
= bp_enabled
;
4316 b
->frame_id
= frame_id
;
4317 check_duplicates (b
);
4323 disable_watchpoints_before_interactive_call_start (void)
4325 struct breakpoint
*b
;
4329 if (((b
->type
== bp_watchpoint
)
4330 || (b
->type
== bp_hardware_watchpoint
)
4331 || (b
->type
== bp_read_watchpoint
)
4332 || (b
->type
== bp_access_watchpoint
)
4333 || ep_is_exception_catchpoint (b
))
4334 && (b
->enable_state
== bp_enabled
))
4336 b
->enable_state
= bp_call_disabled
;
4337 check_duplicates (b
);
4343 enable_watchpoints_after_interactive_call_stop (void)
4345 struct breakpoint
*b
;
4349 if (((b
->type
== bp_watchpoint
)
4350 || (b
->type
== bp_hardware_watchpoint
)
4351 || (b
->type
== bp_read_watchpoint
)
4352 || (b
->type
== bp_access_watchpoint
)
4353 || ep_is_exception_catchpoint (b
))
4354 && (b
->enable_state
== bp_call_disabled
))
4356 b
->enable_state
= bp_enabled
;
4357 check_duplicates (b
);
4363 /* Set a breakpoint that will evaporate an end of command
4364 at address specified by SAL.
4365 Restrict it to frame FRAME if FRAME is nonzero. */
4368 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4371 register struct breakpoint
*b
;
4372 b
= set_raw_breakpoint (sal
, type
);
4373 b
->enable_state
= bp_enabled
;
4374 b
->disposition
= disp_donttouch
;
4375 b
->frame_id
= frame_id
;
4377 /* If we're debugging a multi-threaded program, then we
4378 want momentary breakpoints to be active in only a
4379 single thread of control. */
4380 if (in_thread_list (inferior_ptid
))
4381 b
->thread
= pid_to_thread_id (inferior_ptid
);
4387 /* Tell the user we have just set a breakpoint B. */
4390 mention (struct breakpoint
*b
)
4393 struct cleanup
*old_chain
;
4394 struct ui_stream
*stb
;
4396 stb
= ui_out_stream_new (uiout
);
4397 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4399 /* FIXME: This is misplaced; mention() is called by things (like hitting a
4400 watchpoint) other than breakpoint creation. It should be possible to
4401 clean this up and at the same time replace the random calls to
4402 breakpoint_changed with this hook, as has already been done for
4403 delete_breakpoint_hook and so on. */
4404 if (create_breakpoint_hook
)
4405 create_breakpoint_hook (b
);
4406 breakpoint_create_event (b
->number
);
4411 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b
->number
);
4414 ui_out_text (uiout
, "Watchpoint ");
4415 ui_out_tuple_begin (uiout
, "wpt");
4416 ui_out_field_int (uiout
, "number", b
->number
);
4417 ui_out_text (uiout
, ": ");
4418 print_expression (b
->exp
, stb
->stream
);
4419 ui_out_field_stream (uiout
, "exp", stb
);
4420 ui_out_tuple_end (uiout
);
4422 case bp_hardware_watchpoint
:
4423 ui_out_text (uiout
, "Hardware watchpoint ");
4424 ui_out_tuple_begin (uiout
, "wpt");
4425 ui_out_field_int (uiout
, "number", b
->number
);
4426 ui_out_text (uiout
, ": ");
4427 print_expression (b
->exp
, stb
->stream
);
4428 ui_out_field_stream (uiout
, "exp", stb
);
4429 ui_out_tuple_end (uiout
);
4431 case bp_read_watchpoint
:
4432 ui_out_text (uiout
, "Hardware read watchpoint ");
4433 ui_out_tuple_begin (uiout
, "hw-rwpt");
4434 ui_out_field_int (uiout
, "number", b
->number
);
4435 ui_out_text (uiout
, ": ");
4436 print_expression (b
->exp
, stb
->stream
);
4437 ui_out_field_stream (uiout
, "exp", stb
);
4438 ui_out_tuple_end (uiout
);
4440 case bp_access_watchpoint
:
4441 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4442 ui_out_tuple_begin (uiout
, "hw-awpt");
4443 ui_out_field_int (uiout
, "number", b
->number
);
4444 ui_out_text (uiout
, ": ");
4445 print_expression (b
->exp
, stb
->stream
);
4446 ui_out_field_stream (uiout
, "exp", stb
);
4447 ui_out_tuple_end (uiout
);
4450 if (ui_out_is_mi_like_p (uiout
))
4455 printf_filtered ("Breakpoint %d", b
->number
);
4458 case bp_hardware_breakpoint
:
4459 if (ui_out_is_mi_like_p (uiout
))
4464 printf_filtered ("Hardware assisted breakpoint %d", b
->number
);
4468 case bp_catch_unload
:
4469 printf_filtered ("Catchpoint %d (%s %s)",
4471 (b
->type
== bp_catch_load
) ? "load" : "unload",
4472 (b
->dll_pathname
!= NULL
) ?
4473 b
->dll_pathname
: "<any library>");
4476 case bp_catch_vfork
:
4477 printf_filtered ("Catchpoint %d (%s)",
4479 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4482 printf_filtered ("Catchpoint %d (exec)",
4485 case bp_catch_catch
:
4486 case bp_catch_throw
:
4487 printf_filtered ("Catchpoint %d (%s)",
4489 (b
->type
== bp_catch_catch
) ? "catch" : "throw");
4495 case bp_longjmp_resume
:
4496 case bp_step_resume
:
4497 case bp_through_sigtramp
:
4499 case bp_watchpoint_scope
:
4500 case bp_shlib_event
:
4501 case bp_thread_event
:
4502 case bp_overlay_event
:
4507 if (addressprint
|| b
->source_file
== NULL
)
4509 printf_filtered (" at ");
4510 print_address_numeric (b
->address
, 1, gdb_stdout
);
4513 printf_filtered (": file %s, line %d.",
4514 b
->source_file
, b
->line_number
);
4516 do_cleanups (old_chain
);
4517 if (ui_out_is_mi_like_p (uiout
))
4519 printf_filtered ("\n");
4523 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4524 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4525 COND[i] and COND_STRING[i] values.
4527 NOTE: If the function succeeds, the caller is expected to cleanup
4528 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4529 array contents). If the function fails (error() is called), the
4530 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4531 COND and SALS arrays and each of those arrays contents. */
4534 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
4535 struct expression
**cond
, char **cond_string
,
4536 enum bptype type
, enum bpdisp disposition
,
4537 int thread
, int ignore_count
, int from_tty
)
4539 if (type
== bp_hardware_breakpoint
)
4541 int i
= hw_breakpoint_used_count ();
4542 int target_resources_ok
=
4543 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
4545 if (target_resources_ok
== 0)
4546 error ("No hardware breakpoint support in the target.");
4547 else if (target_resources_ok
< 0)
4548 error ("Hardware breakpoints used exceeds limit.");
4551 /* Now set all the breakpoints. */
4554 for (i
= 0; i
< sals
.nelts
; i
++)
4556 struct breakpoint
*b
;
4557 struct symtab_and_line sal
= sals
.sals
[i
];
4560 describe_other_breakpoints (sal
.pc
, sal
.section
);
4562 b
= set_raw_breakpoint (sal
, type
);
4563 set_breakpoint_count (breakpoint_count
+ 1);
4564 b
->number
= breakpoint_count
;
4568 b
->addr_string
= addr_string
[i
];
4570 /* addr_string has to be used or breakpoint_re_set will delete
4572 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->address
));
4573 b
->cond_string
= cond_string
[i
];
4574 b
->ignore_count
= ignore_count
;
4575 b
->enable_state
= bp_enabled
;
4576 b
->disposition
= disposition
;
4582 /* Parse ARG which is assumed to be a SAL specification possibly
4583 followed by conditionals. On return, SALS contains an array of SAL
4584 addresses found. ADDR_STRING contains a vector of (canonical)
4585 address strings. ARG points to the end of the SAL. */
4588 parse_breakpoint_sals (char **address
,
4589 struct symtabs_and_lines
*sals
,
4590 char ***addr_string
)
4592 char *addr_start
= *address
;
4593 *addr_string
= NULL
;
4594 /* If no arg given, or if first arg is 'if ', use the default
4596 if ((*address
) == NULL
4597 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
4599 if (default_breakpoint_valid
)
4601 struct symtab_and_line sal
;
4602 init_sal (&sal
); /* initialize to zeroes */
4603 sals
->sals
= (struct symtab_and_line
*)
4604 xmalloc (sizeof (struct symtab_and_line
));
4605 sal
.pc
= default_breakpoint_address
;
4606 sal
.line
= default_breakpoint_line
;
4607 sal
.symtab
= default_breakpoint_symtab
;
4608 sal
.section
= find_pc_overlay (sal
.pc
);
4609 sals
->sals
[0] = sal
;
4613 error ("No default breakpoint address now.");
4617 /* Force almost all breakpoints to be in terms of the
4618 current_source_symtab (which is decode_line_1's default). This
4619 should produce the results we want almost all of the time while
4620 leaving default_breakpoint_* alone.
4621 ObjC: However, don't match an Objective-C method name which
4622 may have a '+' or '-' succeeded by a '[' */
4624 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
4626 if (default_breakpoint_valid
4628 || ((strchr ("+-", (*address
)[0]) != NULL
)
4629 && ((*address
)[1] != '['))))
4630 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
4631 default_breakpoint_line
, addr_string
);
4633 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0, addr_string
);
4635 /* For any SAL that didn't have a canonical string, fill one in. */
4636 if (sals
->nelts
> 0 && *addr_string
== NULL
)
4637 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
4638 if (addr_start
!= (*address
))
4641 for (i
= 0; i
< sals
->nelts
; i
++)
4643 /* Add the string if not present. */
4644 if ((*addr_string
)[i
] == NULL
)
4645 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
4651 /* Convert each SAL into a real PC. Verify that the PC can be
4652 inserted as a breakpoint. If it can't throw an error. */
4655 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
4659 for (i
= 0; i
< sals
->nelts
; i
++)
4661 resolve_sal_pc (&sals
->sals
[i
]);
4663 /* It's possible for the PC to be nonzero, but still an illegal
4664 value on some targets.
4666 For example, on HP-UX if you start gdb, and before running the
4667 inferior you try to set a breakpoint on a shared library function
4668 "foo" where the inferior doesn't call "foo" directly but does
4669 pass its address to another function call, then we do find a
4670 minimal symbol for the "foo", but it's address is invalid.
4671 (Appears to be an index into a table that the loader sets up
4672 when the inferior is run.)
4674 Give the target a chance to bless sals.sals[i].pc before we
4675 try to make a breakpoint for it. */
4676 if (PC_REQUIRES_RUN_BEFORE_USE (sals
->sals
[i
].pc
))
4678 if (address
== NULL
)
4679 error ("Cannot break without a running program.");
4681 error ("Cannot break on %s without a running program.",
4687 /* Set a breakpoint according to ARG (function, linenum or *address)
4688 flag: first bit : 0 non-temporary, 1 temporary.
4689 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
4692 break_command_1 (char *arg
, int flag
, int from_tty
)
4694 int tempflag
, hardwareflag
;
4695 struct symtabs_and_lines sals
;
4696 register struct expression
**cond
= 0;
4697 /* Pointers in arg to the start, and one past the end, of the
4699 char **cond_string
= (char **) NULL
;
4700 char *addr_start
= arg
;
4702 struct cleanup
*old_chain
;
4703 struct cleanup
*breakpoint_chain
= NULL
;
4706 int ignore_count
= 0;
4708 hardwareflag
= flag
& BP_HARDWAREFLAG
;
4709 tempflag
= flag
& BP_TEMPFLAG
;
4714 parse_breakpoint_sals (&arg
, &sals
, &addr_string
);
4719 /* Create a chain of things that always need to be cleaned up. */
4720 old_chain
= make_cleanup (null_cleanup
, 0);
4722 /* Make sure that all storage allocated to SALS gets freed. */
4723 make_cleanup (xfree
, sals
.sals
);
4725 /* Cleanup the addr_string array but not its contents. */
4726 make_cleanup (xfree
, addr_string
);
4728 /* Allocate space for all the cond expressions. */
4729 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
4730 make_cleanup (xfree
, cond
);
4732 /* Allocate space for all the cond strings. */
4733 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
4734 make_cleanup (xfree
, cond_string
);
4736 /* ----------------------------- SNIP -----------------------------
4737 Anything added to the cleanup chain beyond this point is assumed
4738 to be part of a breakpoint. If the breakpoint create succeeds
4739 then the memory is not reclaimed. */
4740 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
4742 /* Mark the contents of the addr_string for cleanup. These go on
4743 the breakpoint_chain and only occure if the breakpoint create
4745 for (i
= 0; i
< sals
.nelts
; i
++)
4747 if (addr_string
[i
] != NULL
)
4748 make_cleanup (xfree
, addr_string
[i
]);
4751 /* Resolve all line numbers to PC's and verify that the addresses
4752 are ok for the target. */
4753 breakpoint_sals_to_pc (&sals
, addr_start
);
4755 /* Verify that condition can be parsed, before setting any
4756 breakpoints. Allocate a separate condition expression for each
4758 thread
= -1; /* No specific thread yet */
4759 for (i
= 0; i
< sals
.nelts
; i
++)
4766 char *cond_start
= NULL
;
4767 char *cond_end
= NULL
;
4768 while (*tok
== ' ' || *tok
== '\t')
4773 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
4776 toklen
= end_tok
- tok
;
4778 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
4780 tok
= cond_start
= end_tok
+ 1;
4781 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
4782 make_cleanup (xfree
, cond
[i
]);
4784 cond_string
[i
] = savestring (cond_start
, cond_end
- cond_start
);
4785 make_cleanup (xfree
, cond_string
[i
]);
4787 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
4793 thread
= strtol (tok
, &tok
, 0);
4795 error ("Junk after thread keyword.");
4796 if (!valid_thread_id (thread
))
4797 error ("Unknown thread %d\n", thread
);
4800 error ("Junk at end of arguments.");
4804 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
4805 hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
4806 tempflag
? disp_del
: disp_donttouch
,
4807 thread
, ignore_count
, from_tty
);
4811 warning ("Multiple breakpoints were set.");
4812 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
4814 /* That's it. Discard the cleanups for data inserted into the
4816 discard_cleanups (breakpoint_chain
);
4817 /* But cleanup everything else. */
4818 do_cleanups (old_chain
);
4821 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
4822 linenum or *address) with COND and IGNORE_COUNT. */
4824 struct captured_breakpoint_args
4835 do_captured_breakpoint (void *data
)
4837 struct captured_breakpoint_args
*args
= data
;
4838 struct symtabs_and_lines sals
;
4839 register struct expression
**cond
;
4840 struct cleanup
*old_chain
;
4841 struct cleanup
*breakpoint_chain
= NULL
;
4848 /* Parse the source and lines spec. Delay check that the expression
4849 didn't contain trailing garbage until after cleanups are in
4853 address_end
= args
->address
;
4855 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
);
4860 /* Create a chain of things at always need to be cleaned up. */
4861 old_chain
= make_cleanup (null_cleanup
, 0);
4863 /* Always have a addr_string array, even if it is empty. */
4864 make_cleanup (xfree
, addr_string
);
4866 /* Make sure that all storage allocated to SALS gets freed. */
4867 make_cleanup (xfree
, sals
.sals
);
4869 /* Allocate space for all the cond expressions. */
4870 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
4871 make_cleanup (xfree
, cond
);
4873 /* Allocate space for all the cond strings. */
4874 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
4875 make_cleanup (xfree
, cond_string
);
4877 /* ----------------------------- SNIP -----------------------------
4878 Anything added to the cleanup chain beyond this point is assumed
4879 to be part of a breakpoint. If the breakpoint create goes
4880 through then that memory is not cleaned up. */
4881 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
4883 /* Mark the contents of the addr_string for cleanup. These go on
4884 the breakpoint_chain and only occure if the breakpoint create
4886 for (i
= 0; i
< sals
.nelts
; i
++)
4888 if (addr_string
[i
] != NULL
)
4889 make_cleanup (xfree
, addr_string
[i
]);
4892 /* Wait until now before checking for garbage at the end of the
4893 address. That way cleanups can take care of freeing any
4895 if (*address_end
!= '\0')
4896 error ("Garbage %s following breakpoint address", address_end
);
4898 /* Resolve all line numbers to PC's. */
4899 breakpoint_sals_to_pc (&sals
, args
->address
);
4901 /* Verify that conditions can be parsed, before setting any
4903 for (i
= 0; i
< sals
.nelts
; i
++)
4905 if (args
->condition
!= NULL
)
4907 char *tok
= args
->condition
;
4908 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
4910 error ("Garbage %s follows condition", tok
);
4911 make_cleanup (xfree
, cond
[i
]);
4912 cond_string
[i
] = xstrdup (args
->condition
);
4916 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
4917 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
4918 args
->tempflag
? disp_del
: disp_donttouch
,
4919 args
->thread
, args
->ignore_count
, 0/*from-tty*/);
4921 /* That's it. Discard the cleanups for data inserted into the
4923 discard_cleanups (breakpoint_chain
);
4924 /* But cleanup everything else. */
4925 do_cleanups (old_chain
);
4930 gdb_breakpoint (char *address
, char *condition
,
4931 int hardwareflag
, int tempflag
,
4932 int thread
, int ignore_count
)
4934 struct captured_breakpoint_args args
;
4935 args
.address
= address
;
4936 args
.condition
= condition
;
4937 args
.hardwareflag
= hardwareflag
;
4938 args
.tempflag
= tempflag
;
4939 args
.thread
= thread
;
4940 args
.ignore_count
= ignore_count
;
4941 return catch_errors (do_captured_breakpoint
, &args
,
4942 NULL
, RETURN_MASK_ALL
);
4947 break_at_finish_at_depth_command_1 (char *arg
, int flag
, int from_tty
)
4949 struct frame_info
*frame
;
4950 CORE_ADDR low
, high
, selected_pc
= 0;
4951 char *extra_args
= NULL
;
4954 int extra_args_len
= 0, if_arg
= 0;
4957 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
4960 if (default_breakpoint_valid
)
4962 if (deprecated_selected_frame
)
4964 selected_pc
= get_frame_pc (deprecated_selected_frame
);
4969 error ("No selected frame.");
4972 error ("No default breakpoint address now.");
4976 extra_args
= strchr (arg
, ' ');
4980 extra_args_len
= strlen (extra_args
);
4981 level_arg
= (char *) xmalloc (extra_args
- arg
);
4982 strncpy (level_arg
, arg
, extra_args
- arg
- 1);
4983 level_arg
[extra_args
- arg
- 1] = '\0';
4987 level_arg
= (char *) xmalloc (strlen (arg
) + 1);
4988 strcpy (level_arg
, arg
);
4991 frame
= parse_frame_specification (level_arg
);
4993 selected_pc
= get_frame_pc (frame
);
5000 extra_args_len
= strlen (arg
);
5005 if (find_pc_partial_function (selected_pc
, (char **) NULL
, &low
, &high
))
5007 addr_string
= (char *) xmalloc (26 + extra_args_len
);
5009 sprintf (addr_string
, "*0x%s %s", paddr_nz (high
), extra_args
);
5011 sprintf (addr_string
, "*0x%s", paddr_nz (high
));
5012 break_command_1 (addr_string
, flag
, from_tty
);
5013 xfree (addr_string
);
5016 error ("No function contains the specified address");
5019 error ("Unable to set breakpoint at procedure exit");
5024 break_at_finish_command_1 (char *arg
, int flag
, int from_tty
)
5026 char *addr_string
, *break_string
, *beg_addr_string
;
5027 CORE_ADDR low
, high
;
5028 struct symtabs_and_lines sals
;
5029 struct symtab_and_line sal
;
5030 struct cleanup
*old_chain
;
5031 char *extra_args
= NULL
;
5032 int extra_args_len
= 0;
5036 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5038 if (default_breakpoint_valid
)
5040 if (deprecated_selected_frame
)
5042 addr_string
= (char *) xmalloc (15);
5043 sprintf (addr_string
, "*0x%s",
5044 paddr_nz (get_frame_pc (deprecated_selected_frame
)));
5049 error ("No selected frame.");
5052 error ("No default breakpoint address now.");
5056 addr_string
= (char *) xmalloc (strlen (arg
) + 1);
5057 strcpy (addr_string
, arg
);
5063 extra_args_len
= strlen (arg
);
5067 /* get the stuff after the function name or address */
5068 extra_args
= strchr (arg
, ' ');
5072 extra_args_len
= strlen (extra_args
);
5079 beg_addr_string
= addr_string
;
5080 sals
= decode_line_1 (&addr_string
, 1, (struct symtab
*) NULL
, 0,
5083 xfree (beg_addr_string
);
5084 old_chain
= make_cleanup (xfree
, sals
.sals
);
5085 for (i
= 0; (i
< sals
.nelts
); i
++)
5088 if (find_pc_partial_function (sal
.pc
, (char **) NULL
, &low
, &high
))
5090 break_string
= (char *) xmalloc (extra_args_len
+ 26);
5092 sprintf (break_string
, "*0x%s %s", paddr_nz (high
), extra_args
);
5094 sprintf (break_string
, "*0x%s", paddr_nz (high
));
5095 break_command_1 (break_string
, flag
, from_tty
);
5096 xfree (break_string
);
5099 error ("No function contains the specified address");
5103 warning ("Multiple breakpoints were set.\n");
5104 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5106 do_cleanups (old_chain
);
5110 /* Helper function for break_command_1 and disassemble_command. */
5113 resolve_sal_pc (struct symtab_and_line
*sal
)
5117 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5119 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5120 error ("No line %d in file \"%s\".",
5121 sal
->line
, sal
->symtab
->filename
);
5125 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5127 struct blockvector
*bv
;
5132 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &index
, sal
->symtab
);
5135 b
= BLOCKVECTOR_BLOCK (bv
, index
);
5136 sym
= block_function (b
);
5139 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5140 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5144 /* It really is worthwhile to have the section, so we'll just
5145 have to look harder. This case can be executed if we have
5146 line numbers but no functions (as can happen in assembly
5149 struct minimal_symbol
*msym
;
5151 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5153 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5160 break_command (char *arg
, int from_tty
)
5162 break_command_1 (arg
, 0, from_tty
);
5166 break_at_finish_command (char *arg
, int from_tty
)
5168 break_at_finish_command_1 (arg
, 0, from_tty
);
5172 break_at_finish_at_depth_command (char *arg
, int from_tty
)
5174 break_at_finish_at_depth_command_1 (arg
, 0, from_tty
);
5178 tbreak_command (char *arg
, int from_tty
)
5180 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5184 tbreak_at_finish_command (char *arg
, int from_tty
)
5186 break_at_finish_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5190 hbreak_command (char *arg
, int from_tty
)
5192 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5196 thbreak_command (char *arg
, int from_tty
)
5198 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5202 stop_command (char *arg
, int from_tty
)
5204 printf_filtered ("Specify the type of breakpoint to set.\n\
5205 Usage: stop in <function | address>\n\
5210 stopin_command (char *arg
, int from_tty
)
5214 if (arg
== (char *) NULL
)
5216 else if (*arg
!= '*')
5221 /* look for a ':'. If this is a line number specification, then
5222 say it is bad, otherwise, it should be an address or
5223 function/method name */
5224 while (*argptr
&& !hasColon
)
5226 hasColon
= (*argptr
== ':');
5231 badInput
= (*argptr
!= ':'); /* Not a class::method */
5233 badInput
= isdigit (*arg
); /* a simple line number */
5237 printf_filtered ("Usage: stop in <function | address>\n");
5239 break_command_1 (arg
, 0, from_tty
);
5243 stopat_command (char *arg
, int from_tty
)
5247 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5254 /* look for a ':'. If there is a '::' then get out, otherwise
5255 it is probably a line number. */
5256 while (*argptr
&& !hasColon
)
5258 hasColon
= (*argptr
== ':');
5263 badInput
= (*argptr
== ':'); /* we have class::method */
5265 badInput
= !isdigit (*arg
); /* not a line number */
5269 printf_filtered ("Usage: stop at <line>\n");
5271 break_command_1 (arg
, 0, from_tty
);
5275 /* accessflag: hw_write: watch write,
5276 hw_read: watch read,
5277 hw_access: watch access (read or write) */
5279 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5281 struct breakpoint
*b
;
5282 struct symtab_and_line sal
;
5283 struct expression
*exp
;
5284 struct block
*exp_valid_block
;
5285 struct value
*val
, *mark
;
5286 struct frame_info
*frame
;
5287 struct frame_info
*prev_frame
= NULL
;
5288 char *exp_start
= NULL
;
5289 char *exp_end
= NULL
;
5290 char *tok
, *end_tok
;
5292 char *cond_start
= NULL
;
5293 char *cond_end
= NULL
;
5294 struct expression
*cond
= NULL
;
5295 int i
, other_type_used
, target_resources_ok
= 0;
5296 enum bptype bp_type
;
5299 init_sal (&sal
); /* initialize to zeroes */
5301 /* Parse arguments. */
5302 innermost_block
= NULL
;
5304 exp
= parse_exp_1 (&arg
, 0, 0);
5306 exp_valid_block
= innermost_block
;
5307 mark
= value_mark ();
5308 val
= evaluate_expression (exp
);
5309 release_value (val
);
5310 if (VALUE_LAZY (val
))
5311 value_fetch_lazy (val
);
5314 while (*tok
== ' ' || *tok
== '\t')
5318 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5321 toklen
= end_tok
- tok
;
5322 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5324 tok
= cond_start
= end_tok
+ 1;
5325 cond
= parse_exp_1 (&tok
, 0, 0);
5329 error ("Junk at end of command.");
5331 if (accessflag
== hw_read
)
5332 bp_type
= bp_read_watchpoint
;
5333 else if (accessflag
== hw_access
)
5334 bp_type
= bp_access_watchpoint
;
5336 bp_type
= bp_hardware_watchpoint
;
5338 mem_cnt
= can_use_hardware_watchpoint (val
);
5339 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5340 error ("Expression cannot be implemented with read/access watchpoint.");
5343 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5344 target_resources_ok
=
5345 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5347 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5348 error ("Target does not support this type of hardware watchpoint.");
5350 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5351 error ("Target can only support one kind of HW watchpoint at a time.");
5354 #if defined(HPUXHPPA)
5355 /* On HP-UX if you set a h/w
5356 watchpoint before the "run" command, the inferior dies with a e.g.,
5357 SIGILL once you start it. I initially believed this was due to a
5358 bad interaction between page protection traps and the initial
5359 startup sequence by the dynamic linker.
5361 However, I tried avoiding that by having HP-UX's implementation of
5362 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5363 yet, which forced slow watches before a "run" or "attach", and it
5364 still fails somewhere in the startup code.
5366 Until I figure out what's happening, I'm disallowing watches altogether
5367 before the "run" or "attach" command. We'll tell the user they must
5368 set watches after getting the program started. */
5369 if (!target_has_execution
)
5371 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5374 #endif /* HPUXHPPA */
5376 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5377 watchpoint could not be set. */
5378 if (!mem_cnt
|| target_resources_ok
<= 0)
5379 bp_type
= bp_watchpoint
;
5381 /* Now set up the breakpoint. */
5382 b
= set_raw_breakpoint (sal
, bp_type
);
5383 set_breakpoint_count (breakpoint_count
+ 1);
5384 b
->number
= breakpoint_count
;
5385 b
->disposition
= disp_donttouch
;
5387 b
->exp_valid_block
= exp_valid_block
;
5388 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5392 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5396 frame
= block_innermost_frame (exp_valid_block
);
5399 prev_frame
= get_prev_frame (frame
);
5400 b
->watchpoint_frame
= get_frame_id (frame
);
5404 memset (&b
->watchpoint_frame
, 0, sizeof (b
->watchpoint_frame
));
5407 /* If the expression is "local", then set up a "watchpoint scope"
5408 breakpoint at the point where we've left the scope of the watchpoint
5410 if (innermost_block
)
5414 struct breakpoint
*scope_breakpoint
;
5415 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5416 bp_watchpoint_scope
);
5418 scope_breakpoint
->enable_state
= bp_enabled
;
5420 /* Automatically delete the breakpoint when it hits. */
5421 scope_breakpoint
->disposition
= disp_del
;
5423 /* Only break in the proper frame (help with recursion). */
5424 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5426 /* Set the address at which we will stop. */
5427 scope_breakpoint
->address
= get_frame_pc (prev_frame
);
5429 /* The scope breakpoint is related to the watchpoint. We
5430 will need to act on them together. */
5431 b
->related_breakpoint
= scope_breakpoint
;
5434 value_free_to_mark (mark
);
5438 /* Return count of locations need to be watched and can be handled
5439 in hardware. If the watchpoint can not be handled
5440 in hardware return zero. */
5442 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
5443 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
5444 ((BYTE_SIZE) <= (REGISTER_SIZE))
5447 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5448 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5449 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5453 can_use_hardware_watchpoint (struct value
*v
)
5455 int found_memory_cnt
= 0;
5456 struct value
*head
= v
;
5458 /* Did the user specifically forbid us to use hardware watchpoints? */
5459 if (!can_use_hw_watchpoints
)
5462 /* Make sure that the value of the expression depends only upon
5463 memory contents, and values computed from them within GDB. If we
5464 find any register references or function calls, we can't use a
5465 hardware watchpoint.
5467 The idea here is that evaluating an expression generates a series
5468 of values, one holding the value of every subexpression. (The
5469 expression a*b+c has five subexpressions: a, b, a*b, c, and
5470 a*b+c.) GDB's values hold almost enough information to establish
5471 the criteria given above --- they identify memory lvalues,
5472 register lvalues, computed values, etcetera. So we can evaluate
5473 the expression, and then scan the chain of values that leaves
5474 behind to decide whether we can detect any possible change to the
5475 expression's final value using only hardware watchpoints.
5477 However, I don't think that the values returned by inferior
5478 function calls are special in any way. So this function may not
5479 notice that an expression involving an inferior function call
5480 can't be watched with hardware watchpoints. FIXME. */
5481 for (; v
; v
= v
->next
)
5483 if (VALUE_LVAL (v
) == lval_memory
)
5486 /* A lazy memory lvalue is one that GDB never needed to fetch;
5487 we either just used its address (e.g., `a' in `a.b') or
5488 we never needed it at all (e.g., `a' in `a,b'). */
5492 /* Ahh, memory we actually used! Check if we can cover
5493 it with hardware watchpoints. */
5494 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
5496 /* We only watch structs and arrays if user asked for it
5497 explicitly, never if they just happen to appear in a
5498 middle of some value chain. */
5500 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
5501 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
5503 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
5504 int len
= TYPE_LENGTH (VALUE_TYPE (v
));
5506 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
5513 else if (v
->lval
!= not_lval
&& v
->modifiable
== 0)
5514 return 0; /* ??? What does this represent? */
5515 else if (v
->lval
== lval_register
)
5516 return 0; /* cannot watch a register with a HW watchpoint */
5519 /* The expression itself looks suitable for using a hardware
5520 watchpoint, but give the target machine a chance to reject it. */
5521 return found_memory_cnt
;
5525 watch_command_wrapper (char *arg
, int from_tty
)
5527 watch_command (arg
, from_tty
);
5531 watch_command (char *arg
, int from_tty
)
5533 watch_command_1 (arg
, hw_write
, from_tty
);
5537 rwatch_command_wrapper (char *arg
, int from_tty
)
5539 rwatch_command (arg
, from_tty
);
5543 rwatch_command (char *arg
, int from_tty
)
5545 watch_command_1 (arg
, hw_read
, from_tty
);
5549 awatch_command_wrapper (char *arg
, int from_tty
)
5551 awatch_command (arg
, from_tty
);
5555 awatch_command (char *arg
, int from_tty
)
5557 watch_command_1 (arg
, hw_access
, from_tty
);
5561 /* Helper routines for the until_command routine in infcmd.c. Here
5562 because it uses the mechanisms of breakpoints. */
5564 /* This function is called by fetch_inferior_event via the
5565 cmd_continuation pointer, to complete the until command. It takes
5566 care of cleaning up the temporary breakpoints set up by the until
5569 until_break_command_continuation (struct continuation_arg
*arg
)
5571 struct cleanup
*cleanups
;
5573 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
5574 do_exec_cleanups (cleanups
);
5579 until_break_command (char *arg
, int from_tty
)
5581 struct symtabs_and_lines sals
;
5582 struct symtab_and_line sal
;
5583 struct frame_info
*prev_frame
= get_prev_frame (deprecated_selected_frame
);
5584 struct breakpoint
*breakpoint
;
5585 struct cleanup
*old_chain
;
5586 struct continuation_arg
*arg1
;
5589 clear_proceed_status ();
5591 /* Set a breakpoint where the user wants it and at return from
5594 if (default_breakpoint_valid
)
5595 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
5596 default_breakpoint_line
, (char ***) NULL
);
5598 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
5599 0, (char ***) NULL
);
5601 if (sals
.nelts
!= 1)
5602 error ("Couldn't get information on specified line.");
5605 xfree (sals
.sals
); /* malloc'd, so freed */
5608 error ("Junk at end of arguments.");
5610 resolve_sal_pc (&sal
);
5613 set_momentary_breakpoint (sal
,get_frame_id (deprecated_selected_frame
),
5616 if (!event_loop_p
|| !target_can_async_p ())
5617 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
5619 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
5621 /* If we are running asynchronously, and the target supports async
5622 execution, we are not waiting for the target to stop, in the call
5623 tp proceed, below. This means that we cannot delete the
5624 brekpoints until the target has actually stopped. The only place
5625 where we get a chance to do that is in fetch_inferior_event, so
5626 we must set things up for that. */
5628 if (event_loop_p
&& target_can_async_p ())
5630 /* In this case the arg for the continuation is just the point
5631 in the exec_cleanups chain from where to start doing
5632 cleanups, because all the continuation does is the cleanups in
5633 the exec_cleanup_chain. */
5635 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
5637 arg1
->data
.pointer
= old_chain
;
5639 add_continuation (until_break_command_continuation
, arg1
);
5642 /* Keep within the current frame */
5646 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
5647 sal
.pc
= get_frame_pc (prev_frame
);
5648 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
5650 if (!event_loop_p
|| !target_can_async_p ())
5651 make_cleanup_delete_breakpoint (breakpoint
);
5653 make_exec_cleanup_delete_breakpoint (breakpoint
);
5656 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
5657 /* Do the cleanups now, anly if we are not running asynchronously,
5658 of if we are, but the target is still synchronous. */
5659 if (!event_loop_p
|| !target_can_async_p ())
5660 do_cleanups (old_chain
);
5664 /* These aren't used; I don't konw what they were for. */
5665 /* Set a breakpoint at the catch clause for NAME. */
5667 catch_breakpoint (char *name
)
5672 disable_catch_breakpoint (void)
5677 delete_catch_breakpoint (void)
5682 enable_catch_breakpoint (void)
5689 struct sal_chain
*next
;
5690 struct symtab_and_line sal
;
5694 /* Not really used -- invocation in handle_gnu_4_16_catch_command
5695 had been commented out in the v.4.16 sources, and stays
5696 disabled there now because "catch NAME" syntax isn't allowed.
5698 /* This isn't used; I don't know what it was for. */
5699 /* For each catch clause identified in ARGS, run FUNCTION
5700 with that clause as an argument. */
5701 static struct symtabs_and_lines
5702 map_catch_names (char *args
, int (*function
) ())
5704 register char *p
= args
;
5706 struct symtabs_and_lines sals
;
5708 struct sal_chain
*sal_chain
= 0;
5712 error_no_arg ("one or more catch names");
5720 /* Don't swallow conditional part. */
5721 if (p1
[0] == 'i' && p1
[1] == 'f'
5722 && (p1
[2] == ' ' || p1
[2] == '\t'))
5728 while (isalnum (*p1
) || *p1
== '_' || *p1
== '$')
5732 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
5733 error ("Arguments must be catch names.");
5739 struct sal_chain
*next
= (struct sal_chain
*)
5740 alloca (sizeof (struct sal_chain
));
5741 next
->next
= sal_chain
;
5742 next
->sal
= get_catch_sal (p
);
5747 printf_unfiltered ("No catch clause for exception %s.\n", p
);
5752 while (*p
== ' ' || *p
== '\t')
5758 /* This shares a lot of code with `print_frame_label_vars' from stack.c. */
5760 static struct symtabs_and_lines
5761 get_catch_sals (int this_level_only
)
5763 register struct blockvector
*bl
;
5764 register struct block
*block
;
5765 int index
, have_default
= 0;
5767 struct symtabs_and_lines sals
;
5768 struct sal_chain
*sal_chain
= 0;
5769 char *blocks_searched
;
5771 /* Not sure whether an error message is always the correct response,
5772 but it's better than a core dump. */
5773 if (deprecated_selected_frame
== NULL
)
5774 error ("No selected frame.");
5775 block
= get_frame_block (deprecated_selected_frame
, 0);
5776 pc
= get_frame_pc (deprecated_selected_frame
);
5782 error ("No symbol table info available.\n");
5784 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
5785 blocks_searched
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
5786 memset (blocks_searched
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
5790 CORE_ADDR end
= BLOCK_END (block
) - 4;
5793 if (bl
!= blockvector_for_pc (end
, &index
))
5794 error ("blockvector blotch");
5795 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
5796 error ("blockvector botch");
5797 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
5800 /* Don't print out blocks that have gone by. */
5801 while (index
< last_index
5802 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
5805 while (index
< last_index
5806 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
5808 if (blocks_searched
[index
] == 0)
5810 struct block
*b
= BLOCKVECTOR_BLOCK (bl
, index
);
5812 register struct symbol
*sym
;
5814 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
5816 if (STREQ (SYMBOL_NAME (sym
), "default"))
5822 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
5824 struct sal_chain
*next
= (struct sal_chain
*)
5825 alloca (sizeof (struct sal_chain
));
5826 next
->next
= sal_chain
;
5827 next
->sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
),
5832 blocks_searched
[index
] = 1;
5838 if (sal_chain
&& this_level_only
)
5841 /* After handling the function's top-level block, stop.
5842 Don't continue to its superblock, the block of
5843 per-file symbols. */
5844 if (BLOCK_FUNCTION (block
))
5846 block
= BLOCK_SUPERBLOCK (block
);
5851 struct sal_chain
*tmp_chain
;
5853 /* Count the number of entries. */
5854 for (index
= 0, tmp_chain
= sal_chain
; tmp_chain
;
5855 tmp_chain
= tmp_chain
->next
)
5859 sals
.sals
= (struct symtab_and_line
*)
5860 xmalloc (index
* sizeof (struct symtab_and_line
));
5861 for (index
= 0; sal_chain
; sal_chain
= sal_chain
->next
, index
++)
5862 sals
.sals
[index
] = sal_chain
->sal
;
5869 ep_skip_leading_whitespace (char **s
)
5871 if ((s
== NULL
) || (*s
== NULL
))
5873 while (isspace (**s
))
5877 /* This function examines a string, and attempts to find a token
5878 that might be an event name in the leading characters. If a
5879 possible match is found, a pointer to the last character of
5880 the token is returned. Else, NULL is returned. */
5883 ep_find_event_name_end (char *arg
)
5886 char *event_name_end
= NULL
;
5888 /* If we could depend upon the presense of strrpbrk, we'd use that... */
5892 /* We break out of the loop when we find a token delimiter.
5893 Basically, we're looking for alphanumerics and underscores;
5894 anything else delimites the token. */
5897 if (!isalnum (*s
) && (*s
!= '_'))
5903 return event_name_end
;
5907 /* This function attempts to parse an optional "if <cond>" clause
5908 from the arg string. If one is not found, it returns NULL.
5910 Else, it returns a pointer to the condition string. (It does not
5911 attempt to evaluate the string against a particular block.) And,
5912 it updates arg to point to the first character following the parsed
5913 if clause in the arg string. */
5916 ep_parse_optional_if_clause (char **arg
)
5920 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
5923 /* Skip the "if" keyword. */
5926 /* Skip any extra leading whitespace, and record the start of the
5927 condition string. */
5928 ep_skip_leading_whitespace (arg
);
5931 /* Assume that the condition occupies the remainder of the arg string. */
5932 (*arg
) += strlen (cond_string
);
5937 /* This function attempts to parse an optional filename from the arg
5938 string. If one is not found, it returns NULL.
5940 Else, it returns a pointer to the parsed filename. (This function
5941 makes no attempt to verify that a file of that name exists, or is
5942 accessible.) And, it updates arg to point to the first character
5943 following the parsed filename in the arg string.
5945 Note that clients needing to preserve the returned filename for
5946 future access should copy it to their own buffers. */
5948 ep_parse_optional_filename (char **arg
)
5950 static char filename
[1024];
5955 if ((*arg_p
== '\0') || isspace (*arg_p
))
5973 /* Commands to deal with catching events, such as signals, exceptions,
5974 process start/exit, etc. */
5978 catch_fork
, catch_vfork
5982 #if defined(CHILD_INSERT_FORK_CATCHPOINT) || defined(CHILD_INSERT_VFORK_CATCHPOINT)
5983 static void catch_fork_command_1 (catch_fork_kind fork_kind
,
5984 char *arg
, int tempflag
, int from_tty
);
5987 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
5990 char *cond_string
= NULL
;
5992 ep_skip_leading_whitespace (&arg
);
5994 /* The allowed syntax is:
5996 catch [v]fork if <cond>
5998 First, check if there's an if clause. */
5999 cond_string
= ep_parse_optional_if_clause (&arg
);
6001 if ((*arg
!= '\0') && !isspace (*arg
))
6002 error ("Junk at end of arguments.");
6004 /* If this target supports it, create a fork or vfork catchpoint
6005 and enable reporting of such events. */
6009 create_fork_event_catchpoint (tempflag
, cond_string
);
6012 create_vfork_event_catchpoint (tempflag
, cond_string
);
6015 error ("unsupported or unknown fork kind; cannot catch it");
6021 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6023 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6025 char *cond_string
= NULL
;
6027 ep_skip_leading_whitespace (&arg
);
6029 /* The allowed syntax is:
6031 catch exec if <cond>
6033 First, check if there's an if clause. */
6034 cond_string
= ep_parse_optional_if_clause (&arg
);
6036 if ((*arg
!= '\0') && !isspace (*arg
))
6037 error ("Junk at end of arguments.");
6039 /* If this target supports it, create an exec catchpoint
6040 and enable reporting of such events. */
6041 create_exec_event_catchpoint (tempflag
, cond_string
);
6045 #if defined(SOLIB_ADD)
6047 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6049 char *dll_pathname
= NULL
;
6050 char *cond_string
= NULL
;
6052 ep_skip_leading_whitespace (&arg
);
6054 /* The allowed syntax is:
6056 catch load if <cond>
6057 catch load <filename>
6058 catch load <filename> if <cond>
6060 The user is not allowed to specify the <filename> after an
6063 We'll ignore the pathological case of a file named "if".
6065 First, check if there's an if clause. If so, then there
6066 cannot be a filename. */
6067 cond_string
= ep_parse_optional_if_clause (&arg
);
6069 /* If there was an if clause, then there cannot be a filename.
6070 Else, there might be a filename and an if clause. */
6071 if (cond_string
== NULL
)
6073 dll_pathname
= ep_parse_optional_filename (&arg
);
6074 ep_skip_leading_whitespace (&arg
);
6075 cond_string
= ep_parse_optional_if_clause (&arg
);
6078 if ((*arg
!= '\0') && !isspace (*arg
))
6079 error ("Junk at end of arguments.");
6081 /* Create a load breakpoint that only triggers when a load of
6082 the specified dll (or any dll, if no pathname was specified)
6084 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6085 dll_pathname
, cond_string
);
6089 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6091 char *dll_pathname
= NULL
;
6092 char *cond_string
= NULL
;
6094 ep_skip_leading_whitespace (&arg
);
6096 /* The allowed syntax is:
6098 catch unload if <cond>
6099 catch unload <filename>
6100 catch unload <filename> if <cond>
6102 The user is not allowed to specify the <filename> after an
6105 We'll ignore the pathological case of a file named "if".
6107 First, check if there's an if clause. If so, then there
6108 cannot be a filename. */
6109 cond_string
= ep_parse_optional_if_clause (&arg
);
6111 /* If there was an if clause, then there cannot be a filename.
6112 Else, there might be a filename and an if clause. */
6113 if (cond_string
== NULL
)
6115 dll_pathname
= ep_parse_optional_filename (&arg
);
6116 ep_skip_leading_whitespace (&arg
);
6117 cond_string
= ep_parse_optional_if_clause (&arg
);
6120 if ((*arg
!= '\0') && !isspace (*arg
))
6121 error ("Junk at end of arguments.");
6123 /* Create an unload breakpoint that only triggers when an unload of
6124 the specified dll (or any dll, if no pathname was specified)
6126 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6127 dll_pathname
, cond_string
);
6129 #endif /* SOLIB_ADD */
6131 /* Commands to deal with catching exceptions. */
6133 /* Set a breakpoint at the specified callback routine for an
6134 exception event callback */
6137 create_exception_catchpoint (int tempflag
, char *cond_string
,
6138 enum exception_event_kind ex_event
,
6139 struct symtab_and_line
*sal
)
6141 struct breakpoint
*b
;
6142 int thread
= -1; /* All threads. */
6145 if (!sal
) /* no exception support? */
6150 case EX_EVENT_THROW
:
6151 bptype
= bp_catch_throw
;
6153 case EX_EVENT_CATCH
:
6154 bptype
= bp_catch_catch
;
6156 default: /* error condition */
6157 error ("Internal error -- invalid catchpoint kind");
6160 b
= set_raw_breakpoint (*sal
, bptype
);
6161 set_breakpoint_count (breakpoint_count
+ 1);
6162 b
->number
= breakpoint_count
;
6164 b
->cond_string
= (cond_string
== NULL
) ?
6165 NULL
: savestring (cond_string
, strlen (cond_string
));
6167 b
->addr_string
= NULL
;
6168 b
->enable_state
= bp_enabled
;
6169 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6173 /* Deal with "catch catch" and "catch throw" commands */
6176 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6177 int tempflag
, int from_tty
)
6179 char *cond_string
= NULL
;
6180 struct symtab_and_line
*sal
= NULL
;
6182 ep_skip_leading_whitespace (&arg
);
6184 cond_string
= ep_parse_optional_if_clause (&arg
);
6186 if ((*arg
!= '\0') && !isspace (*arg
))
6187 error ("Junk at end of arguments.");
6189 if ((ex_event
!= EX_EVENT_THROW
) &&
6190 (ex_event
!= EX_EVENT_CATCH
))
6191 error ("Unsupported or unknown exception event; cannot catch it");
6193 /* See if we can find a callback routine */
6194 sal
= target_enable_exception_callback (ex_event
, 1);
6198 /* We have callbacks from the runtime system for exceptions.
6199 Set a breakpoint on the sal found, if no errors */
6200 if (sal
!= (struct symtab_and_line
*) -1)
6201 create_exception_catchpoint (tempflag
, cond_string
, ex_event
, sal
);
6203 return; /* something went wrong with setting up callbacks */
6207 /* No callbacks from runtime system for exceptions.
6208 Try GNU C++ exception breakpoints using labels in debug info. */
6209 if (ex_event
== EX_EVENT_CATCH
)
6211 handle_gnu_4_16_catch_command (arg
, tempflag
, from_tty
);
6213 else if (ex_event
== EX_EVENT_THROW
)
6215 /* Set a breakpoint on __raise_exception () */
6217 warning ("Unsupported with this platform/compiler combination.");
6218 warning ("Perhaps you can achieve the effect you want by setting");
6219 warning ("a breakpoint on __raise_exception().");
6224 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6225 inside a catch_errors */
6228 cover_target_enable_exception_callback (PTR arg
)
6230 args_for_catchpoint_enable
*args
= arg
;
6231 struct symtab_and_line
*sal
;
6232 sal
= target_enable_exception_callback (args
->kind
, args
->enable_p
);
6235 else if (sal
== (struct symtab_and_line
*) -1)
6238 return 1; /*is valid */
6243 /* This is the original v.4.16 and earlier version of the
6244 catch_command_1() function. Now that other flavours of "catch"
6245 have been introduced, and since exception handling can be handled
6246 in other ways (through target ops) also, this is used only for the
6247 GNU C++ exception handling system.
6248 Note: Only the "catch" flavour of GDB 4.16 is handled here. The
6249 "catch NAME" is now no longer allowed in catch_command_1(). Also,
6250 there was no code in GDB 4.16 for "catch throw".
6252 Called from catch_exception_command_1 () */
6256 handle_gnu_4_16_catch_command (char *arg
, int tempflag
, int from_tty
)
6258 /* First, translate ARG into something we can deal with in terms
6261 struct symtabs_and_lines sals
;
6262 struct symtab_and_line sal
;
6263 register struct expression
*cond
= 0;
6264 register struct breakpoint
*b
;
6268 init_sal (&sal
); /* initialize to zeroes */
6270 /* If no arg given, or if first arg is 'if ', all active catch clauses
6271 are breakpointed. */
6273 if (!arg
|| (arg
[0] == 'i' && arg
[1] == 'f'
6274 && (arg
[2] == ' ' || arg
[2] == '\t')))
6276 /* Grab all active catch clauses. */
6277 sals
= get_catch_sals (0);
6281 /* Grab selected catch clauses. */
6282 error ("catch NAME not implemented");
6285 /* Not sure why this code has been disabled. I'm leaving
6286 it disabled. We can never come here now anyway
6287 since we don't allow the "catch NAME" syntax.
6290 /* This isn't used; I don't know what it was for. */
6291 sals
= map_catch_names (arg
, catch_breakpoint
);
6299 for (i
= 0; i
< sals
.nelts
; i
++)
6301 resolve_sal_pc (&sals
.sals
[i
]);
6305 if (arg
[0] == 'i' && arg
[1] == 'f'
6306 && (arg
[2] == ' ' || arg
[2] == '\t'))
6307 cond
= parse_exp_1 ((arg
+= 2, &arg
),
6308 block_for_pc (sals
.sals
[i
].pc
), 0);
6310 error ("Junk at end of arguments.");
6315 for (i
= 0; i
< sals
.nelts
; i
++)
6320 describe_other_breakpoints (sal
.pc
, sal
.section
);
6322 /* Important -- this is an ordinary breakpoint. For platforms
6323 with callback support for exceptions,
6324 create_exception_catchpoint() will create special bp types
6325 (bp_catch_catch and bp_catch_throw), and there is code in
6326 insert_breakpoints() and elsewhere that depends on that. */
6327 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6328 set_breakpoint_count (breakpoint_count
+ 1);
6329 b
->number
= breakpoint_count
;
6332 b
->enable_state
= bp_enabled
;
6333 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6340 warning ("Multiple breakpoints were set.");
6341 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
6347 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6350 /* The first argument may be an event name, such as "start" or "load".
6351 If so, then handle it as such. If it doesn't match an event name,
6352 then attempt to interpret it as an exception name. (This latter is
6353 the v4.16-and-earlier GDB meaning of the "catch" command.)
6355 First, try to find the bounds of what might be an event name. */
6356 char *arg1_start
= arg
;
6360 if (arg1_start
== NULL
)
6362 /* Old behaviour was to use pre-v-4.16 syntax */
6363 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6365 /* Now, this is not allowed */
6366 error ("Catch requires an event name.");
6369 arg1_end
= ep_find_event_name_end (arg1_start
);
6370 if (arg1_end
== NULL
)
6371 error ("catch requires an event");
6372 arg1_length
= arg1_end
+ 1 - arg1_start
;
6374 /* Try to match what we found against known event names. */
6375 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6377 error ("Catch of signal not yet implemented");
6379 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6381 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6382 tempflag
, from_tty
);
6384 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6386 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6387 tempflag
, from_tty
);
6389 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6391 error ("Catch of thread_start not yet implemented");
6393 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6395 error ("Catch of thread_exit not yet implemented");
6397 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6399 error ("Catch of thread_join not yet implemented");
6401 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6403 error ("Catch of start not yet implemented");
6405 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6407 error ("Catch of exit not yet implemented");
6409 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6411 #if defined(CHILD_INSERT_FORK_CATCHPOINT)
6412 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6414 error ("Catch of fork not yet implemented");
6417 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6419 #if defined(CHILD_INSERT_VFORK_CATCHPOINT)
6420 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6422 error ("Catch of vfork not yet implemented");
6425 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6427 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6428 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6430 error ("Catch of exec not yet implemented");
6433 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6435 #if defined(SOLIB_ADD)
6436 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6438 error ("Catch of load not implemented");
6441 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6443 #if defined(SOLIB_ADD)
6444 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6446 error ("Catch of load not implemented");
6449 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6451 error ("Catch of stop not yet implemented");
6454 /* This doesn't appear to be an event name */
6458 /* Pre-v.4.16 behaviour was to treat the argument
6459 as the name of an exception */
6460 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6461 /* Now this is not allowed */
6462 error ("Unknown event kind specified for catch");
6467 /* Used by the gui, could be made a worker for other things. */
6470 set_breakpoint_sal (struct symtab_and_line sal
)
6472 struct breakpoint
*b
;
6473 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6474 set_breakpoint_count (breakpoint_count
+ 1);
6475 b
->number
= breakpoint_count
;
6482 /* These aren't used; I don't know what they were for. */
6483 /* Disable breakpoints on all catch clauses described in ARGS. */
6485 disable_catch (char *args
)
6487 /* Map the disable command to catch clauses described in ARGS. */
6490 /* Enable breakpoints on all catch clauses described in ARGS. */
6492 enable_catch (char *args
)
6494 /* Map the disable command to catch clauses described in ARGS. */
6497 /* Delete breakpoints on all catch clauses in the active scope. */
6499 delete_catch (char *args
)
6501 /* Map the delete command to catch clauses described in ARGS. */
6506 catch_command (char *arg
, int from_tty
)
6508 catch_command_1 (arg
, 0, from_tty
);
6513 tcatch_command (char *arg
, int from_tty
)
6515 catch_command_1 (arg
, 1, from_tty
);
6518 /* Delete breakpoints by address or line. */
6521 clear_command (char *arg
, int from_tty
)
6523 struct breakpoint
*b
, *tmp
, *prev
, *found
;
6525 struct symtabs_and_lines sals
;
6526 struct symtab_and_line sal
;
6531 sals
= decode_line_spec (arg
, 1);
6536 sals
.sals
= (struct symtab_and_line
*)
6537 xmalloc (sizeof (struct symtab_and_line
));
6538 make_cleanup (xfree
, sals
.sals
);
6539 init_sal (&sal
); /* initialize to zeroes */
6540 sal
.line
= default_breakpoint_line
;
6541 sal
.symtab
= default_breakpoint_symtab
;
6542 sal
.pc
= default_breakpoint_address
;
6543 if (sal
.symtab
== 0)
6544 error ("No source file specified.");
6552 /* For each line spec given, delete bps which correspond
6553 to it. Do it in two passes, solely to preserve the current
6554 behavior that from_tty is forced true if we delete more than
6558 for (i
= 0; i
< sals
.nelts
; i
++)
6560 /* If exact pc given, clear bpts at that pc.
6561 If line given (pc == 0), clear all bpts on specified line.
6562 If defaulting, clear all bpts on default line
6565 defaulting sal.pc != 0 tests to do
6570 1 0 <can't happen> */
6575 /* Find all matching breakpoints, remove them from the
6576 breakpoint chain, and add them to the 'found' chain. */
6577 ALL_BREAKPOINTS_SAFE (b
, tmp
)
6579 /* Are we going to delete b? */
6580 if (b
->type
!= bp_none
6581 && b
->type
!= bp_watchpoint
6582 && b
->type
!= bp_hardware_watchpoint
6583 && b
->type
!= bp_read_watchpoint
6584 && b
->type
!= bp_access_watchpoint
6585 /* Not if b is a watchpoint of any sort... */
6586 && (((sal
.pc
&& (b
->address
== sal
.pc
))
6587 && (!section_is_overlay (b
->section
)
6588 || b
->section
== sal
.section
))
6589 /* Yes, if sal.pc matches b (modulo overlays). */
6590 || ((default_match
|| (0 == sal
.pc
))
6591 && b
->source_file
!= NULL
6592 && sal
.symtab
!= NULL
6593 && STREQ (b
->source_file
, sal
.symtab
->filename
)
6594 && b
->line_number
== sal
.line
)))
6595 /* Yes, if sal source file and line matches b. */
6597 /* Remove it from breakpoint_chain... */
6598 if (b
== breakpoint_chain
)
6600 /* b is at the head of the list */
6601 breakpoint_chain
= b
->next
;
6605 prev
->next
= b
->next
;
6607 /* And add it to 'found' chain. */
6613 /* Keep b, and keep a pointer to it. */
6618 /* Now go thru the 'found' chain and delete them. */
6622 error ("No breakpoint at %s.", arg
);
6624 error ("No breakpoint at this line.");
6628 from_tty
= 1; /* Always report if deleted more than one */
6630 printf_unfiltered ("Deleted breakpoint%s ", found
->next
? "s" : "");
6631 breakpoints_changed ();
6635 printf_unfiltered ("%d ", found
->number
);
6637 delete_breakpoint (found
);
6641 putchar_unfiltered ('\n');
6644 /* Delete breakpoint in BS if they are `delete' breakpoints and
6645 all breakpoints that are marked for deletion, whether hit or not.
6646 This is called after any breakpoint is hit, or after errors. */
6649 breakpoint_auto_delete (bpstat bs
)
6651 struct breakpoint
*b
, *temp
;
6653 for (; bs
; bs
= bs
->next
)
6654 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== disp_del
6656 delete_breakpoint (bs
->breakpoint_at
);
6658 ALL_BREAKPOINTS_SAFE (b
, temp
)
6660 if (b
->disposition
== disp_del_at_next_stop
)
6661 delete_breakpoint (b
);
6665 /* Delete a breakpoint and clean up all traces of it in the data
6669 delete_breakpoint (struct breakpoint
*bpt
)
6671 register struct breakpoint
*b
;
6675 error ("Internal error (attempted to delete a NULL breakpoint)");
6678 /* Has this bp already been deleted? This can happen because multiple
6679 lists can hold pointers to bp's. bpstat lists are especial culprits.
6681 One example of this happening is a watchpoint's scope bp. When the
6682 scope bp triggers, we notice that the watchpoint is out of scope, and
6683 delete it. We also delete its scope bp. But the scope bp is marked
6684 "auto-deleting", and is already on a bpstat. That bpstat is then
6685 checked for auto-deleting bp's, which are deleted.
6687 A real solution to this problem might involve reference counts in bp's,
6688 and/or giving them pointers back to their referencing bpstat's, and
6689 teaching delete_breakpoint to only free a bp's storage when no more
6690 references were extent. A cheaper bandaid was chosen. */
6691 if (bpt
->type
== bp_none
)
6694 if (delete_breakpoint_hook
)
6695 delete_breakpoint_hook (bpt
);
6696 breakpoint_delete_event (bpt
->number
);
6699 remove_breakpoint (bpt
, mark_inserted
);
6701 if (breakpoint_chain
== bpt
)
6702 breakpoint_chain
= bpt
->next
;
6704 /* If we have callback-style exception catchpoints, don't go through
6705 the adjustments to the C++ runtime library etc. if the inferior
6706 isn't actually running. target_enable_exception_callback for a
6707 null target ops vector gives an undesirable error message, so we
6708 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6709 exceptions are supported in this way, it's OK for now. FIXME */
6710 if (ep_is_exception_catchpoint (bpt
) && target_has_execution
)
6712 static char message1
[] = "Error in deleting catchpoint %d:\n";
6713 static char message
[sizeof (message1
) + 30];
6714 args_for_catchpoint_enable args
;
6716 /* Format possible error msg */
6717 sprintf (message
, message1
, bpt
->number
);
6718 args
.kind
= bpt
->type
== bp_catch_catch
?
6719 EX_EVENT_CATCH
: EX_EVENT_THROW
;
6721 catch_errors (cover_target_enable_exception_callback
, &args
,
6722 message
, RETURN_MASK_ALL
);
6729 b
->next
= bpt
->next
;
6733 check_duplicates (bpt
);
6734 /* If this breakpoint was inserted, and there is another breakpoint
6735 at the same address, we need to insert the other breakpoint. */
6737 && bpt
->type
!= bp_hardware_watchpoint
6738 && bpt
->type
!= bp_read_watchpoint
6739 && bpt
->type
!= bp_access_watchpoint
6740 && bpt
->type
!= bp_catch_fork
6741 && bpt
->type
!= bp_catch_vfork
6742 && bpt
->type
!= bp_catch_exec
)
6745 if (b
->address
== bpt
->address
6746 && b
->section
== bpt
->section
6748 && b
->enable_state
!= bp_disabled
6749 && b
->enable_state
!= bp_shlib_disabled
6750 && b
->enable_state
!= bp_call_disabled
)
6754 /* We should never reach this point if there is a permanent
6755 breakpoint at the same address as the one being deleted.
6756 If there is a permanent breakpoint somewhere, it should
6757 always be the only one inserted. */
6758 if (b
->enable_state
== bp_permanent
)
6759 internal_error (__FILE__
, __LINE__
,
6760 "another breakpoint was inserted on top of "
6761 "a permanent breakpoint");
6763 if (b
->type
== bp_hardware_breakpoint
)
6764 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
6766 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
6768 /* If there was an error in the insert, print a message, then stop execution. */
6771 struct ui_file
*tmp_error_stream
= mem_fileopen ();
6772 make_cleanup_ui_file_delete (tmp_error_stream
);
6775 if (b
->type
== bp_hardware_breakpoint
)
6777 fprintf_unfiltered (tmp_error_stream
,
6778 "Cannot insert hardware breakpoint %d.\n"
6779 "You may have requested too many hardware breakpoints.\n",
6784 fprintf_unfiltered (tmp_error_stream
, "Cannot insert breakpoint %d.\n", b
->number
);
6785 fprintf_filtered (tmp_error_stream
, "Error accessing memory address ");
6786 print_address_numeric (b
->address
, 1, tmp_error_stream
);
6787 fprintf_filtered (tmp_error_stream
, ": %s.\n",
6788 safe_strerror (val
));
6791 fprintf_unfiltered (tmp_error_stream
,"The same program may be running in another process.");
6792 target_terminal_ours_for_output ();
6793 error_stream(tmp_error_stream
);
6800 free_command_lines (&bpt
->commands
);
6803 if (bpt
->cond_string
!= NULL
)
6804 xfree (bpt
->cond_string
);
6805 if (bpt
->addr_string
!= NULL
)
6806 xfree (bpt
->addr_string
);
6807 if (bpt
->exp
!= NULL
)
6809 if (bpt
->exp_string
!= NULL
)
6810 xfree (bpt
->exp_string
);
6811 if (bpt
->val
!= NULL
)
6812 value_free (bpt
->val
);
6813 if (bpt
->source_file
!= NULL
)
6814 xfree (bpt
->source_file
);
6815 if (bpt
->dll_pathname
!= NULL
)
6816 xfree (bpt
->dll_pathname
);
6817 if (bpt
->triggered_dll_pathname
!= NULL
)
6818 xfree (bpt
->triggered_dll_pathname
);
6819 if (bpt
->exec_pathname
!= NULL
)
6820 xfree (bpt
->exec_pathname
);
6822 /* Be sure no bpstat's are pointing at it after it's been freed. */
6823 /* FIXME, how can we find all bpstat's?
6824 We just check stop_bpstat for now. */
6825 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
6826 if (bs
->breakpoint_at
== bpt
)
6828 bs
->breakpoint_at
= NULL
;
6830 /* bs->commands will be freed later. */
6832 /* On the chance that someone will soon try again to delete this same
6833 bp, we mark it as deleted before freeing its storage. */
6834 bpt
->type
= bp_none
;
6840 do_delete_breakpoint_cleanup (void *b
)
6842 delete_breakpoint (b
);
6846 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
6848 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
6852 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
6854 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
6858 delete_command (char *arg
, int from_tty
)
6860 struct breakpoint
*b
, *temp
;
6866 int breaks_to_delete
= 0;
6868 /* Delete all breakpoints if no argument.
6869 Do not delete internal or call-dummy breakpoints, these
6870 have to be deleted with an explicit breakpoint number argument. */
6873 if (b
->type
!= bp_call_dummy
&&
6874 b
->type
!= bp_shlib_event
&&
6875 b
->type
!= bp_thread_event
&&
6876 b
->type
!= bp_overlay_event
&&
6878 breaks_to_delete
= 1;
6881 /* Ask user only if there are some breakpoints to delete. */
6883 || (breaks_to_delete
&& query ("Delete all breakpoints? ")))
6885 ALL_BREAKPOINTS_SAFE (b
, temp
)
6887 if (b
->type
!= bp_call_dummy
&&
6888 b
->type
!= bp_shlib_event
&&
6889 b
->type
!= bp_thread_event
&&
6890 b
->type
!= bp_overlay_event
&&
6892 delete_breakpoint (b
);
6897 map_breakpoint_numbers (arg
, delete_breakpoint
);
6900 /* Reset a breakpoint given it's struct breakpoint * BINT.
6901 The value we return ends up being the return value from catch_errors.
6902 Unused in this case. */
6905 breakpoint_re_set_one (PTR bint
)
6907 /* get past catch_errs */
6908 struct breakpoint
*b
= (struct breakpoint
*) bint
;
6911 struct symtabs_and_lines sals
;
6913 enum enable_state save_enable
;
6918 warning ("attempted to reset apparently deleted breakpoint #%d?",
6922 case bp_hardware_breakpoint
:
6924 case bp_catch_unload
:
6925 if (b
->addr_string
== NULL
)
6927 /* Anything without a string can't be re-set. */
6928 delete_breakpoint (b
);
6931 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
6933 ``And a hack it is, although Apple's Darwin version of GDB
6934 contains an almost identical hack to implement a "future
6935 break" command. It seems to work in many real world cases,
6936 but it is easy to come up with a test case where the patch
6937 doesn't help at all.''
6939 ``It seems that the way GDB implements breakpoints - in -
6940 shared - libraries was designed for a.out shared library
6941 systems (SunOS 4) where shared libraries were loaded at a
6942 fixed address in memory. Since ELF shared libraries can (and
6943 will) be loaded at any address in memory, things break.
6944 Fixing this is not trivial. Therefore, I'm not sure whether
6945 we should add this hack to the branch only. I cannot
6946 guarantee that things will be fixed on the trunk in the near
6949 In case we have a problem, disable this breakpoint. We'll
6950 restore its status if we succeed. Don't disable a
6951 shlib_disabled breakpoint though. There's a fair chance we
6952 can't re-set it if the shared library it's in hasn't been
6954 save_enable
= b
->enable_state
;
6955 if (b
->enable_state
!= bp_shlib_disabled
)
6956 b
->enable_state
= bp_disabled
;
6958 set_language (b
->language
);
6959 input_radix
= b
->input_radix
;
6961 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
);
6962 for (i
= 0; i
< sals
.nelts
; i
++)
6964 resolve_sal_pc (&sals
.sals
[i
]);
6966 /* Reparse conditions, they might contain references to the
6968 if (b
->cond_string
!= NULL
)
6973 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
6976 /* We need to re-set the breakpoint if the address changes... */
6977 if (b
->address
!= sals
.sals
[i
].pc
6978 /* ...or new and old breakpoints both have source files, and
6979 the source file name or the line number changes... */
6980 || (b
->source_file
!= NULL
6981 && sals
.sals
[i
].symtab
!= NULL
6982 && (!STREQ (b
->source_file
, sals
.sals
[i
].symtab
->filename
)
6983 || b
->line_number
!= sals
.sals
[i
].line
)
6985 /* ...or we switch between having a source file and not having
6987 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
6990 if (b
->source_file
!= NULL
)
6991 xfree (b
->source_file
);
6992 if (sals
.sals
[i
].symtab
== NULL
)
6993 b
->source_file
= NULL
;
6996 savestring (sals
.sals
[i
].symtab
->filename
,
6997 strlen (sals
.sals
[i
].symtab
->filename
));
6998 b
->line_number
= sals
.sals
[i
].line
;
6999 b
->address
= sals
.sals
[i
].pc
;
7001 /* Used to check for duplicates here, but that can
7002 cause trouble, as it doesn't check for disabled
7007 /* Might be better to do this just once per breakpoint_re_set,
7008 rather than once for every breakpoint. */
7009 breakpoints_changed ();
7011 b
->section
= sals
.sals
[i
].section
;
7012 b
->enable_state
= save_enable
; /* Restore it, this worked. */
7015 /* Now that this is re-enabled, check_duplicates
7017 check_duplicates (b
);
7024 case bp_hardware_watchpoint
:
7025 case bp_read_watchpoint
:
7026 case bp_access_watchpoint
:
7027 innermost_block
= NULL
;
7028 /* The issue arises of what context to evaluate this in. The
7029 same one as when it was set, but what does that mean when
7030 symbols have been re-read? We could save the filename and
7031 functionname, but if the context is more local than that, the
7032 best we could do would be something like how many levels deep
7033 and which index at that particular level, but that's going to
7034 be less stable than filenames or function names. */
7036 /* So for now, just use a global context. */
7039 b
->exp
= parse_expression (b
->exp_string
);
7040 b
->exp_valid_block
= innermost_block
;
7041 mark
= value_mark ();
7043 value_free (b
->val
);
7044 b
->val
= evaluate_expression (b
->exp
);
7045 release_value (b
->val
);
7046 if (VALUE_LAZY (b
->val
) && b
->enable_state
== bp_enabled
)
7047 value_fetch_lazy (b
->val
);
7049 if (b
->cond_string
!= NULL
)
7054 b
->cond
= parse_exp_1 (&s
, (struct block
*) 0, 0);
7056 if (b
->enable_state
== bp_enabled
)
7058 value_free_to_mark (mark
);
7060 case bp_catch_catch
:
7061 case bp_catch_throw
:
7063 /* We needn't really do anything to reset these, since the mask
7064 that requests them is unaffected by e.g., new libraries being
7067 case bp_catch_vfork
:
7072 printf_filtered ("Deleting unknown breakpoint type %d\n", b
->type
);
7074 /* Delete longjmp and overlay event breakpoints; they will be
7075 reset later by breakpoint_re_set. */
7077 case bp_longjmp_resume
:
7078 case bp_overlay_event
:
7079 delete_breakpoint (b
);
7082 /* This breakpoint is special, it's set up when the inferior
7083 starts and we really don't want to touch it. */
7084 case bp_shlib_event
:
7086 /* Like bp_shlib_event, this breakpoint type is special.
7087 Once it is set up, we do not want to touch it. */
7088 case bp_thread_event
:
7090 /* Keep temporary breakpoints, which can be encountered when we step
7091 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7092 Otherwise these should have been blown away via the cleanup chain
7093 or by breakpoint_init_inferior when we rerun the executable. */
7096 case bp_watchpoint_scope
:
7098 case bp_step_resume
:
7105 /* Re-set all breakpoints after symbols have been re-loaded. */
7107 breakpoint_re_set (void)
7109 struct breakpoint
*b
, *temp
;
7110 enum language save_language
;
7111 int save_input_radix
;
7112 static char message1
[] = "Error in re-setting breakpoint %d:\n";
7113 char message
[sizeof (message1
) + 30 /* slop */ ];
7115 save_language
= current_language
->la_language
;
7116 save_input_radix
= input_radix
;
7117 ALL_BREAKPOINTS_SAFE (b
, temp
)
7119 /* Format possible error msg */
7120 sprintf (message
, message1
, b
->number
);
7121 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7123 set_language (save_language
);
7124 input_radix
= save_input_radix
;
7126 if (GET_LONGJMP_TARGET_P ())
7128 create_longjmp_breakpoint ("longjmp");
7129 create_longjmp_breakpoint ("_longjmp");
7130 create_longjmp_breakpoint ("siglongjmp");
7131 create_longjmp_breakpoint ("_siglongjmp");
7132 create_longjmp_breakpoint (NULL
);
7135 create_overlay_event_breakpoint ("_ovly_debug_event");
7138 /* Reset the thread number of this breakpoint:
7140 - If the breakpoint is for all threads, leave it as-is.
7141 - Else, reset it to the current thread for inferior_ptid. */
7143 breakpoint_re_set_thread (struct breakpoint
*b
)
7145 if (b
->thread
!= -1)
7147 if (in_thread_list (inferior_ptid
))
7148 b
->thread
= pid_to_thread_id (inferior_ptid
);
7152 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7153 If from_tty is nonzero, it prints a message to that effect,
7154 which ends with a period (no newline). */
7157 set_ignore_count (int bptnum
, int count
, int from_tty
)
7159 register struct breakpoint
*b
;
7165 if (b
->number
== bptnum
)
7167 b
->ignore_count
= count
;
7171 printf_filtered ("Will stop next time breakpoint %d is reached.",
7173 else if (count
== 1)
7174 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7177 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7180 breakpoints_changed ();
7181 breakpoint_modify_event (b
->number
);
7185 error ("No breakpoint number %d.", bptnum
);
7188 /* Clear the ignore counts of all breakpoints. */
7190 breakpoint_clear_ignore_counts (void)
7192 struct breakpoint
*b
;
7195 b
->ignore_count
= 0;
7198 /* Command to set ignore-count of breakpoint N to COUNT. */
7201 ignore_command (char *args
, int from_tty
)
7207 error_no_arg ("a breakpoint number");
7209 num
= get_number (&p
);
7211 error ("bad breakpoint number: '%s'", args
);
7213 error ("Second argument (specified ignore-count) is missing.");
7215 set_ignore_count (num
,
7216 longest_to_int (value_as_long (parse_and_eval (p
))),
7219 printf_filtered ("\n");
7222 /* Call FUNCTION on each of the breakpoints
7223 whose numbers are given in ARGS. */
7226 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7228 register char *p
= args
;
7231 register struct breakpoint
*b
, *tmp
;
7235 error_no_arg ("one or more breakpoint numbers");
7242 num
= get_number_or_range (&p1
);
7245 warning ("bad breakpoint number at or near '%s'", p
);
7249 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7250 if (b
->number
== num
)
7252 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7255 if (related_breakpoint
)
7256 function (related_breakpoint
);
7260 printf_unfiltered ("No breakpoint number %d.\n", num
);
7266 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7267 If from_tty is nonzero, it prints a message to that effect,
7268 which ends with a period (no newline). */
7271 disable_breakpoint (struct breakpoint
*bpt
)
7273 /* Never disable a watchpoint scope breakpoint; we want to
7274 hit them when we leave scope so we can delete both the
7275 watchpoint and its scope breakpoint at that time. */
7276 if (bpt
->type
== bp_watchpoint_scope
)
7279 /* You can't disable permanent breakpoints. */
7280 if (bpt
->enable_state
== bp_permanent
)
7283 bpt
->enable_state
= bp_disabled
;
7285 check_duplicates (bpt
);
7287 if (modify_breakpoint_hook
)
7288 modify_breakpoint_hook (bpt
);
7289 breakpoint_modify_event (bpt
->number
);
7294 disable_command (char *args
, int from_tty
)
7296 register struct breakpoint
*bpt
;
7298 ALL_BREAKPOINTS (bpt
)
7302 warning ("attempted to disable apparently deleted breakpoint #%d?",
7307 case bp_catch_unload
:
7309 case bp_catch_vfork
:
7311 case bp_catch_catch
:
7312 case bp_catch_throw
:
7313 case bp_hardware_breakpoint
:
7315 case bp_hardware_watchpoint
:
7316 case bp_read_watchpoint
:
7317 case bp_access_watchpoint
:
7318 disable_breakpoint (bpt
);
7323 map_breakpoint_numbers (args
, disable_breakpoint
);
7327 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7329 struct frame_info
*save_selected_frame
= NULL
;
7330 int save_selected_frame_level
= -1;
7331 int target_resources_ok
, other_type_used
;
7334 if (bpt
->type
== bp_hardware_breakpoint
)
7337 i
= hw_breakpoint_used_count ();
7338 target_resources_ok
=
7339 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7341 if (target_resources_ok
== 0)
7342 error ("No hardware breakpoint support in the target.");
7343 else if (target_resources_ok
< 0)
7344 error ("Hardware breakpoints used exceeds limit.");
7347 if (bpt
->enable_state
!= bp_permanent
)
7348 bpt
->enable_state
= bp_enabled
;
7349 bpt
->disposition
= disposition
;
7350 check_duplicates (bpt
);
7351 breakpoints_changed ();
7353 if (bpt
->type
== bp_watchpoint
||
7354 bpt
->type
== bp_hardware_watchpoint
||
7355 bpt
->type
== bp_read_watchpoint
||
7356 bpt
->type
== bp_access_watchpoint
)
7358 if (bpt
->exp_valid_block
!= NULL
)
7360 struct frame_info
*fr
=
7361 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7365 Cannot enable watchpoint %d because the block in which its expression\n\
7366 is valid is not currently in scope.\n", bpt
->number
);
7367 bpt
->enable_state
= bp_disabled
;
7371 save_selected_frame
= deprecated_selected_frame
;
7372 save_selected_frame_level
= frame_relative_level (deprecated_selected_frame
);
7376 value_free (bpt
->val
);
7377 mark
= value_mark ();
7378 bpt
->val
= evaluate_expression (bpt
->exp
);
7379 release_value (bpt
->val
);
7380 if (VALUE_LAZY (bpt
->val
))
7381 value_fetch_lazy (bpt
->val
);
7383 if (bpt
->type
== bp_hardware_watchpoint
||
7384 bpt
->type
== bp_read_watchpoint
||
7385 bpt
->type
== bp_access_watchpoint
)
7387 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7388 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7390 /* Hack around 'unused var' error for some targets here */
7392 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7393 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7394 /* we can consider of type is bp_hardware_watchpoint, convert to
7395 bp_watchpoint in the following condition */
7396 if (target_resources_ok
< 0)
7399 Cannot enable watchpoint %d because target watch resources\n\
7400 have been allocated for other watchpoints.\n", bpt
->number
);
7401 bpt
->enable_state
= bp_disabled
;
7402 value_free_to_mark (mark
);
7407 if (save_selected_frame_level
>= 0)
7408 select_frame (save_selected_frame
);
7409 value_free_to_mark (mark
);
7411 if (modify_breakpoint_hook
)
7412 modify_breakpoint_hook (bpt
);
7413 breakpoint_modify_event (bpt
->number
);
7417 enable_breakpoint (struct breakpoint
*bpt
)
7419 do_enable_breakpoint (bpt
, bpt
->disposition
);
7422 /* The enable command enables the specified breakpoints (or all defined
7423 breakpoints) so they once again become (or continue to be) effective
7424 in stopping the inferior. */
7428 enable_command (char *args
, int from_tty
)
7430 register struct breakpoint
*bpt
;
7432 ALL_BREAKPOINTS (bpt
)
7436 warning ("attempted to enable apparently deleted breakpoint #%d?",
7441 case bp_catch_unload
:
7443 case bp_catch_vfork
:
7445 case bp_catch_catch
:
7446 case bp_catch_throw
:
7447 case bp_hardware_breakpoint
:
7449 case bp_hardware_watchpoint
:
7450 case bp_read_watchpoint
:
7451 case bp_access_watchpoint
:
7452 enable_breakpoint (bpt
);
7457 map_breakpoint_numbers (args
, enable_breakpoint
);
7461 enable_once_breakpoint (struct breakpoint
*bpt
)
7463 do_enable_breakpoint (bpt
, disp_disable
);
7468 enable_once_command (char *args
, int from_tty
)
7470 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7474 enable_delete_breakpoint (struct breakpoint
*bpt
)
7476 do_enable_breakpoint (bpt
, disp_del
);
7481 enable_delete_command (char *args
, int from_tty
)
7483 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7486 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7488 struct symtabs_and_lines
7489 decode_line_spec_1 (char *string
, int funfirstline
)
7491 struct symtabs_and_lines sals
;
7493 error ("Empty line specification.");
7494 if (default_breakpoint_valid
)
7495 sals
= decode_line_1 (&string
, funfirstline
,
7496 default_breakpoint_symtab
,
7497 default_breakpoint_line
,
7500 sals
= decode_line_1 (&string
, funfirstline
,
7501 (struct symtab
*) NULL
, 0, (char ***) NULL
);
7503 error ("Junk at end of line specification: %s", string
);
7508 _initialize_breakpoint (void)
7510 struct cmd_list_element
*c
;
7512 breakpoint_chain
= 0;
7513 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7514 before a breakpoint is set. */
7515 breakpoint_count
= 0;
7517 add_com ("ignore", class_breakpoint
, ignore_command
,
7518 "Set ignore-count of breakpoint number N to COUNT.\n\
7519 Usage is `ignore N COUNT'.");
7521 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
7523 add_com ("commands", class_breakpoint
, commands_command
,
7524 "Set commands to be executed when a breakpoint is hit.\n\
7525 Give breakpoint number as argument after \"commands\".\n\
7526 With no argument, the targeted breakpoint is the last one set.\n\
7527 The commands themselves follow starting on the next line.\n\
7528 Type a line containing \"end\" to indicate the end of them.\n\
7529 Give \"silent\" as the first line to make the breakpoint silent;\n\
7530 then no output is printed when it is hit, except what the commands print.");
7532 add_com ("condition", class_breakpoint
, condition_command
,
7533 "Specify breakpoint number N to break only if COND is true.\n\
7534 Usage is `condition N COND', where N is an integer and COND is an\n\
7535 expression to be evaluated whenever breakpoint N is reached.");
7537 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
,
7538 "Set a temporary breakpoint. Args like \"break\" command.\n\
7539 Like \"break\" except the breakpoint is only temporary,\n\
7540 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7541 by using \"enable delete\" on the breakpoint number.");
7542 set_cmd_completer (c
, location_completer
);
7544 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
,
7545 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7546 Like \"break\" except the breakpoint requires hardware support,\n\
7547 some target hardware may not have this support.");
7548 set_cmd_completer (c
, location_completer
);
7550 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
,
7551 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7552 Like \"hbreak\" except the breakpoint is only temporary,\n\
7553 so it will be deleted when hit.");
7554 set_cmd_completer (c
, location_completer
);
7556 add_prefix_cmd ("enable", class_breakpoint
, enable_command
,
7557 "Enable some breakpoints.\n\
7558 Give breakpoint numbers (separated by spaces) as arguments.\n\
7559 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7560 This is used to cancel the effect of the \"disable\" command.\n\
7561 With a subcommand you can enable temporarily.",
7562 &enablelist
, "enable ", 1, &cmdlist
);
7564 add_com ("ab", class_breakpoint
, enable_command
,
7565 "Enable some breakpoints.\n\
7566 Give breakpoint numbers (separated by spaces) as arguments.\n\
7567 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7568 This is used to cancel the effect of the \"disable\" command.\n\
7569 With a subcommand you can enable temporarily.");
7571 add_com_alias ("en", "enable", class_breakpoint
, 1);
7573 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
,
7574 "Enable some breakpoints.\n\
7575 Give breakpoint numbers (separated by spaces) as arguments.\n\
7576 This is used to cancel the effect of the \"disable\" command.\n\
7577 May be abbreviated to simply \"enable\".\n",
7578 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
7580 add_cmd ("once", no_class
, enable_once_command
,
7581 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7582 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7585 add_cmd ("delete", no_class
, enable_delete_command
,
7586 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7587 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7590 add_cmd ("delete", no_class
, enable_delete_command
,
7591 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7592 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7595 add_cmd ("once", no_class
, enable_once_command
,
7596 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7597 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7600 add_prefix_cmd ("disable", class_breakpoint
, disable_command
,
7601 "Disable some breakpoints.\n\
7602 Arguments are breakpoint numbers with spaces in between.\n\
7603 To disable all breakpoints, give no argument.\n\
7604 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7605 &disablelist
, "disable ", 1, &cmdlist
);
7606 add_com_alias ("dis", "disable", class_breakpoint
, 1);
7607 add_com_alias ("disa", "disable", class_breakpoint
, 1);
7609 add_com ("sb", class_breakpoint
, disable_command
,
7610 "Disable some breakpoints.\n\
7611 Arguments are breakpoint numbers with spaces in between.\n\
7612 To disable all breakpoints, give no argument.\n\
7613 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7615 add_cmd ("breakpoints", class_alias
, 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.\n\
7620 This command may be abbreviated \"disable\".",
7623 add_prefix_cmd ("delete", class_breakpoint
, delete_command
,
7624 "Delete some breakpoints or auto-display expressions.\n\
7625 Arguments are breakpoint numbers with spaces in between.\n\
7626 To delete all breakpoints, give no argument.\n\
7628 Also a prefix command for deletion of other GDB objects.\n\
7629 The \"unset\" command is also an alias for \"delete\".",
7630 &deletelist
, "delete ", 1, &cmdlist
);
7631 add_com_alias ("d", "delete", class_breakpoint
, 1);
7633 add_com ("db", class_breakpoint
, delete_command
,
7634 "Delete some breakpoints.\n\
7635 Arguments are breakpoint numbers with spaces in between.\n\
7636 To delete all breakpoints, give no argument.\n");
7638 add_cmd ("breakpoints", class_alias
, delete_command
,
7639 "Delete some breakpoints or auto-display expressions.\n\
7640 Arguments are breakpoint numbers with spaces in between.\n\
7641 To delete all breakpoints, give no argument.\n\
7642 This command may be abbreviated \"delete\".",
7645 add_com ("clear", class_breakpoint
, clear_command
,
7646 concat ("Clear breakpoint at specified line or function.\n\
7647 Argument may be line number, function name, or \"*\" and an address.\n\
7648 If line number is specified, all breakpoints in that line are cleared.\n\
7649 If function is specified, breakpoints at beginning of function are cleared.\n\
7650 If an address is specified, breakpoints at that address are cleared.\n\n",
7651 "With no argument, clears all breakpoints in the line that the selected frame\n\
7654 See also the \"delete\" command which clears breakpoints by number.", NULL
));
7656 c
= add_com ("break", class_breakpoint
, break_command
,
7657 concat ("Set breakpoint at specified line or function.\n\
7658 Argument may be line number, function name, or \"*\" and an address.\n\
7659 If line number is specified, break at start of code for that line.\n\
7660 If function is specified, break at start of code for that function.\n\
7661 If an address is specified, break at that exact address.\n",
7662 "With no arg, uses current execution address of selected stack frame.\n\
7663 This is useful for breaking on return to a stack frame.\n\
7665 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7667 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL
));
7668 set_cmd_completer (c
, location_completer
);
7670 add_com_alias ("b", "break", class_run
, 1);
7671 add_com_alias ("br", "break", class_run
, 1);
7672 add_com_alias ("bre", "break", class_run
, 1);
7673 add_com_alias ("brea", "break", class_run
, 1);
7677 add_com_alias ("ba", "break", class_breakpoint
, 1);
7678 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
7683 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
,
7684 "Break in function/address or break at a line in the current file.",
7685 &stoplist
, "stop ", 1, &cmdlist
);
7686 add_cmd ("in", class_breakpoint
, stopin_command
,
7687 "Break in function or address.\n", &stoplist
);
7688 add_cmd ("at", class_breakpoint
, stopat_command
,
7689 "Break at a line in the current file.\n", &stoplist
);
7690 add_com ("status", class_info
, breakpoints_info
,
7691 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7692 The \"Type\" column indicates one of:\n\
7693 \tbreakpoint - normal breakpoint\n\
7694 \twatchpoint - watchpoint\n\
7695 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7696 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7697 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7698 address and file/line number respectively.\n\n",
7699 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7700 are set to the address of the last breakpoint listed.\n\n\
7701 Convenience variable \"$bpnum\" contains the number of the last\n\
7702 breakpoint set.", NULL
));
7705 add_info ("breakpoints", breakpoints_info
,
7706 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7707 The \"Type\" column indicates one of:\n\
7708 \tbreakpoint - normal breakpoint\n\
7709 \twatchpoint - watchpoint\n\
7710 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7711 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7712 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7713 address and file/line number respectively.\n\n",
7714 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7715 are set to the address of the last breakpoint listed.\n\n\
7716 Convenience variable \"$bpnum\" contains the number of the last\n\
7717 breakpoint set.", NULL
));
7720 add_com ("lb", class_breakpoint
, breakpoints_info
,
7721 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7722 The \"Type\" column indicates one of:\n\
7723 \tbreakpoint - normal breakpoint\n\
7724 \twatchpoint - watchpoint\n\
7725 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7726 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7727 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7728 address and file/line number respectively.\n\n",
7729 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7730 are set to the address of the last breakpoint listed.\n\n\
7731 Convenience variable \"$bpnum\" contains the number of the last\n\
7732 breakpoint set.", NULL
));
7734 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
,
7735 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7736 The \"Type\" column indicates one of:\n\
7737 \tbreakpoint - normal breakpoint\n\
7738 \twatchpoint - watchpoint\n\
7739 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7740 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7741 \tuntil - internal breakpoint used by the \"until\" command\n\
7742 \tfinish - internal breakpoint used by the \"finish\" command\n",
7743 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7744 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7745 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7746 address and file/line number respectively.\n\n",
7747 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7748 are set to the address of the last breakpoint listed.\n\n\
7749 Convenience variable \"$bpnum\" contains the number of the last\n\
7750 breakpoint set.", NULL
),
7751 &maintenanceinfolist
);
7753 add_com ("catch", class_breakpoint
, catch_command
,
7754 "Set catchpoints to catch events.\n\
7755 Raised signals may be caught:\n\
7756 \tcatch signal - all signals\n\
7757 \tcatch signal <signame> - a particular signal\n\
7758 Raised exceptions may be caught:\n\
7759 \tcatch throw - all exceptions, when thrown\n\
7760 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7761 \tcatch catch - all exceptions, when caught\n\
7762 \tcatch catch <exceptname> - a particular exception, when caught\n\
7763 Thread or process events may be caught:\n\
7764 \tcatch thread_start - any threads, just after creation\n\
7765 \tcatch thread_exit - any threads, just before expiration\n\
7766 \tcatch thread_join - any threads, just after joins\n\
7767 Process events may be caught:\n\
7768 \tcatch start - any processes, just after creation\n\
7769 \tcatch exit - any processes, just before expiration\n\
7770 \tcatch fork - calls to fork()\n\
7771 \tcatch vfork - calls to vfork()\n\
7772 \tcatch exec - calls to exec()\n\
7773 Dynamically-linked library events may be caught:\n\
7774 \tcatch load - loads of any library\n\
7775 \tcatch load <libname> - loads of a particular library\n\
7776 \tcatch unload - unloads of any library\n\
7777 \tcatch unload <libname> - unloads of a particular library\n\
7778 The act of your program's execution stopping may also be caught:\n\
7780 C++ exceptions may be caught:\n\
7781 \tcatch throw - all exceptions, when thrown\n\
7782 \tcatch catch - all exceptions, when caught\n\
7784 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7785 after a fork or vfork is caught.\n\n\
7786 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7788 add_com ("tcatch", class_breakpoint
, tcatch_command
,
7789 "Set temporary catchpoints to catch events.\n\
7790 Args like \"catch\" command.\n\
7791 Like \"catch\" except the catchpoint is only temporary,\n\
7792 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7793 by using \"enable delete\" on the catchpoint number.");
7795 c
= add_com ("watch", class_breakpoint
, watch_command
,
7796 "Set a watchpoint for an expression.\n\
7797 A watchpoint stops execution of your program whenever the value of\n\
7798 an expression changes.");
7799 set_cmd_completer (c
, location_completer
);
7801 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
,
7802 "Set a read watchpoint for an expression.\n\
7803 A watchpoint stops execution of your program whenever the value of\n\
7804 an expression is read.");
7805 set_cmd_completer (c
, location_completer
);
7807 c
= add_com ("awatch", class_breakpoint
, awatch_command
,
7808 "Set a watchpoint for an expression.\n\
7809 A watchpoint stops execution of your program whenever the value of\n\
7810 an expression is either read or written.");
7811 set_cmd_completer (c
, location_completer
);
7813 add_info ("watchpoints", breakpoints_info
,
7814 "Synonym for ``info breakpoints''.");
7817 c
= add_set_cmd ("can-use-hw-watchpoints", class_support
, var_zinteger
,
7818 (char *) &can_use_hw_watchpoints
,
7819 "Set debugger's willingness to use watchpoint hardware.\n\
7820 If zero, gdb will not use hardware for new watchpoints, even if\n\
7821 such is available. (However, any hardware watchpoints that were\n\
7822 created before setting this to nonzero, will continue to use watchpoint\n\
7825 add_show_from_set (c
, &showlist
);
7827 can_use_hw_watchpoints
= 1;