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"
53 #include "gdb-events.h"
55 /* Prototypes for local functions. */
57 static void until_break_command_continuation (struct continuation_arg
*arg
);
59 static void catch_command_1 (char *, int, int);
61 static void enable_delete_command (char *, int);
63 static void enable_delete_breakpoint (struct breakpoint
*);
65 static void enable_once_command (char *, int);
67 static void enable_once_breakpoint (struct breakpoint
*);
69 static void disable_command (char *, int);
71 static void enable_command (char *, int);
73 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint
*));
75 static void ignore_command (char *, int);
77 static int breakpoint_re_set_one (void *);
79 static void clear_command (char *, int);
81 static void catch_command (char *, int);
83 static void watch_command (char *, int);
85 static int can_use_hardware_watchpoint (struct value
*);
87 extern void break_at_finish_command (char *, int);
88 extern void break_at_finish_at_depth_command (char *, int);
90 extern void tbreak_at_finish_command (char *, int);
92 static void break_command_1 (char *, int, int);
94 static void mention (struct breakpoint
*);
96 struct breakpoint
*set_raw_breakpoint (struct symtab_and_line
, enum bptype
);
98 static void check_duplicates (struct breakpoint
*);
100 static void breakpoint_adjustment_warning (CORE_ADDR
, CORE_ADDR
, int, int);
102 static CORE_ADDR
adjust_breakpoint_address (CORE_ADDR bpaddr
);
104 static void describe_other_breakpoints (CORE_ADDR
, asection
*);
106 static void breakpoints_info (char *, int);
108 static void breakpoint_1 (int, int);
110 static bpstat
bpstat_alloc (struct breakpoint
*, bpstat
);
112 static int breakpoint_cond_eval (void *);
114 static void cleanup_executing_breakpoints (void *);
116 static void commands_command (char *, int);
118 static void condition_command (char *, int);
120 static int get_number_trailer (char **, int);
122 void set_breakpoint_count (int);
131 static int remove_breakpoint (struct bp_location
*, insertion_state_t
);
133 static enum print_stop_action
print_it_typical (bpstat
);
135 static enum print_stop_action
print_bp_stop_message (bpstat bs
);
139 enum exception_event_kind kind
;
142 args_for_catchpoint_enable
;
144 static int watchpoint_check (void *);
146 static int cover_target_enable_exception_callback (void *);
148 static void maintenance_info_breakpoints (char *, int);
150 static void create_longjmp_breakpoint (char *);
152 static void create_overlay_event_breakpoint (char *);
154 static int hw_breakpoint_used_count (void);
156 static int hw_watchpoint_used_count (enum bptype
, int *);
158 static void hbreak_command (char *, int);
160 static void thbreak_command (char *, int);
162 static void watch_command_1 (char *, int, int);
164 static void rwatch_command (char *, int);
166 static void awatch_command (char *, int);
168 static void do_enable_breakpoint (struct breakpoint
*, enum bpdisp
);
170 static void solib_load_unload_1 (char *hookname
,
173 char *cond_string
, enum bptype bp_kind
);
175 static void create_fork_vfork_event_catchpoint (int tempflag
,
177 enum bptype bp_kind
);
179 static void break_at_finish_at_depth_command_1 (char *arg
,
180 int flag
, int from_tty
);
182 static void break_at_finish_command_1 (char *arg
, int flag
, int from_tty
);
184 static void stop_command (char *arg
, int from_tty
);
186 static void stopin_command (char *arg
, int from_tty
);
188 static void stopat_command (char *arg
, int from_tty
);
190 static char *ep_find_event_name_end (char *arg
);
192 static char *ep_parse_optional_if_clause (char **arg
);
194 static char *ep_parse_optional_filename (char **arg
);
196 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
197 static void catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
);
200 static void create_exception_catchpoint (int tempflag
, char *cond_string
,
201 enum exception_event_kind ex_event
,
202 struct symtab_and_line
*sal
);
204 static void catch_exception_command_1 (enum exception_event_kind ex_event
,
205 char *arg
, int tempflag
, int from_tty
);
207 static void tcatch_command (char *arg
, int from_tty
);
209 static void ep_skip_leading_whitespace (char **s
);
211 /* Prototypes for exported functions. */
213 /* If FALSE, gdb will not use hardware support for watchpoints, even
214 if such is available. */
215 static int can_use_hw_watchpoints
;
217 void _initialize_breakpoint (void);
219 extern int addressprint
; /* Print machine addresses? */
221 /* Are we executing breakpoint commands? */
222 static int executing_breakpoint_commands
;
224 /* Are overlay event breakpoints enabled? */
225 static int overlay_events_enabled
;
227 /* Walk the following statement or block through all breakpoints.
228 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
231 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
233 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
234 for (B = breakpoint_chain; \
235 B ? (TMP=B->next, 1): 0; \
238 /* Similar iterators for the low-level breakpoints. */
240 #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->next)
242 #define ALL_BP_LOCATIONS_SAFE(B,TMP) \
243 for (B = bp_location_chain; \
244 B ? (TMP=B->next, 1): 0; \
247 /* True if SHIFT_INST_REGS defined, false otherwise. */
249 int must_shift_inst_regs
=
250 #if defined(SHIFT_INST_REGS)
257 /* True if breakpoint hit counts should be displayed in breakpoint info. */
259 int show_breakpoint_hit_counts
= 1;
261 /* Chains of all breakpoints defined. */
263 struct breakpoint
*breakpoint_chain
;
265 struct bp_location
*bp_location_chain
;
267 /* Number of last breakpoint made. */
269 int breakpoint_count
;
271 /* Pointer to current exception event record */
272 static struct exception_event_record
*current_exception_event
;
274 /* Indicator of whether exception catchpoints should be nuked
275 between runs of a program */
276 int exception_catchpoints_are_fragile
= 0;
278 /* Indicator of when exception catchpoints set-up should be
279 reinitialized -- e.g. when program is re-run */
280 int exception_support_initialized
= 0;
282 /* This function returns a pointer to the string representation of the
283 pathname of the dynamically-linked library that has just been
286 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
287 or undefined results are guaranteed.
289 This string's contents are only valid immediately after the
290 inferior has stopped in the dynamic linker hook, and becomes
291 invalid as soon as the inferior is continued. Clients should make
292 a copy of this string if they wish to continue the inferior and
293 then access the string. */
295 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
296 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
299 /* This function returns a pointer to the string representation of the
300 pathname of the dynamically-linked library that has just been
303 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
304 TRUE, or undefined results are guaranteed.
306 This string's contents are only valid immediately after the
307 inferior has stopped in the dynamic linker hook, and becomes
308 invalid as soon as the inferior is continued. Clients should make
309 a copy of this string if they wish to continue the inferior and
310 then access the string. */
312 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
313 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
316 /* This function is called by the "catch load" command. It allows the
317 debugger to be notified by the dynamic linker when a specified
318 library file (or any library file, if filename is NULL) is loaded. */
320 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
321 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
322 error ("catch of library loads not yet implemented on this platform")
325 /* This function is called by the "catch unload" command. It allows
326 the debugger to be notified by the dynamic linker when a specified
327 library file (or any library file, if filename is NULL) is
330 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
331 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \
332 error ("catch of library unloads not yet implemented on this platform")
335 /* Set breakpoint count to NUM. */
338 set_breakpoint_count (int num
)
340 breakpoint_count
= num
;
341 set_internalvar (lookup_internalvar ("bpnum"),
342 value_from_longest (builtin_type_int
, (LONGEST
) num
));
345 /* Used in run_command to zero the hit count when a new run starts. */
348 clear_breakpoint_hit_counts (void)
350 struct breakpoint
*b
;
356 /* Default address, symtab and line to put a breakpoint at
357 for "break" command with no arg.
358 if default_breakpoint_valid is zero, the other three are
359 not valid, and "break" with no arg is an error.
361 This set by print_stack_frame, which calls set_default_breakpoint. */
363 int default_breakpoint_valid
;
364 CORE_ADDR default_breakpoint_address
;
365 struct symtab
*default_breakpoint_symtab
;
366 int default_breakpoint_line
;
368 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
369 Advance *PP after the string and any trailing whitespace.
371 Currently the string can either be a number or "$" followed by the name
372 of a convenience variable. Making it an expression wouldn't work well
373 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
375 TRAILER is a character which can be found after the number; most
376 commonly this is `-'. If you don't want a trailer, use \0. */
378 get_number_trailer (char **pp
, int trailer
)
380 int retval
= 0; /* default */
384 /* Empty line means refer to the last breakpoint. */
385 return breakpoint_count
;
388 /* Make a copy of the name, so we can null-terminate it
389 to pass to lookup_internalvar(). */
394 while (isalnum (*p
) || *p
== '_')
396 varname
= (char *) alloca (p
- start
+ 1);
397 strncpy (varname
, start
, p
- start
);
398 varname
[p
- start
] = '\0';
399 val
= value_of_internalvar (lookup_internalvar (varname
));
400 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_INT
)
401 retval
= (int) value_as_long (val
);
404 printf_filtered ("Convenience variable must have integer value.\n");
412 while (*p
>= '0' && *p
<= '9')
415 /* There is no number here. (e.g. "cond a == b"). */
417 /* Skip non-numeric token */
418 while (*p
&& !isspace((int) *p
))
420 /* Return zero, which caller must interpret as error. */
426 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
428 /* Trailing junk: return 0 and let caller print error msg. */
429 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
440 /* Like get_number_trailer, but don't allow a trailer. */
442 get_number (char **pp
)
444 return get_number_trailer (pp
, '\0');
447 /* Parse a number or a range.
448 * A number will be of the form handled by get_number.
449 * A range will be of the form <number1> - <number2>, and
450 * will represent all the integers between number1 and number2,
453 * While processing a range, this fuction is called iteratively;
454 * At each call it will return the next value in the range.
456 * At the beginning of parsing a range, the char pointer PP will
457 * be advanced past <number1> and left pointing at the '-' token.
458 * Subsequent calls will not advance the pointer until the range
459 * is completed. The call that completes the range will advance
460 * pointer PP past <number2>.
464 get_number_or_range (char **pp
)
466 static int last_retval
, end_value
;
467 static char *end_ptr
;
468 static int in_range
= 0;
472 /* Default case: pp is pointing either to a solo number,
473 or to the first number of a range. */
474 last_retval
= get_number_trailer (pp
, '-');
479 /* This is the start of a range (<number1> - <number2>).
480 Skip the '-', parse and remember the second number,
481 and also remember the end of the final token. */
485 while (isspace ((int) *end_ptr
))
486 end_ptr
++; /* skip white space */
487 end_value
= get_number (temp
);
488 if (end_value
< last_retval
)
490 error ("inverted range");
492 else if (end_value
== last_retval
)
494 /* degenerate range (number1 == number2). Advance the
495 token pointer so that the range will be treated as a
504 error ("negative value");
507 /* pp points to the '-' that betokens a range. All
508 number-parsing has already been done. Return the next
509 integer value (one greater than the saved previous value).
510 Do not advance the token pointer 'pp' until the end of range
513 if (++last_retval
== end_value
)
515 /* End of range reached; advance token pointer. */
525 /* condition N EXP -- set break condition of breakpoint N to EXP. */
528 condition_command (char *arg
, int from_tty
)
530 struct breakpoint
*b
;
535 error_no_arg ("breakpoint number");
538 bnum
= get_number (&p
);
540 error ("Bad breakpoint argument: '%s'", arg
);
543 if (b
->number
== bnum
)
550 if (b
->cond_string
!= NULL
)
551 xfree (b
->cond_string
);
556 b
->cond_string
= NULL
;
558 printf_filtered ("Breakpoint %d now unconditional.\n", bnum
);
563 /* I don't know if it matters whether this is the string the user
564 typed in or the decompiled expression. */
565 b
->cond_string
= savestring (arg
, strlen (arg
));
566 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->loc
->address
), 0);
568 error ("Junk at end of expression");
570 breakpoints_changed ();
571 breakpoint_modify_event (b
->number
);
575 error ("No breakpoint number %d.", bnum
);
579 commands_command (char *arg
, int from_tty
)
581 struct breakpoint
*b
;
584 struct command_line
*l
;
586 /* If we allowed this, we would have problems with when to
587 free the storage, if we change the commands currently
590 if (executing_breakpoint_commands
)
591 error ("Can't use the \"commands\" command among a breakpoint's commands.");
594 bnum
= get_number (&p
);
597 error ("Unexpected extra arguments following breakpoint number.");
600 if (b
->number
== bnum
)
602 char *tmpbuf
= xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
604 struct cleanup
*cleanups
= make_cleanup (xfree
, tmpbuf
);
605 l
= read_command_lines (tmpbuf
, from_tty
);
606 do_cleanups (cleanups
);
607 free_command_lines (&b
->commands
);
609 breakpoints_changed ();
610 breakpoint_modify_event (b
->number
);
613 error ("No breakpoint number %d.", bnum
);
616 /* Like target_read_memory() but if breakpoints are inserted, return
617 the shadow contents instead of the breakpoints themselves.
619 Read "memory data" from whatever target or inferior we have.
620 Returns zero if successful, errno value if not. EIO is used
621 for address out of bounds. If breakpoints are inserted, returns
622 shadow contents, not the breakpoints themselves. From breakpoint.c. */
625 read_memory_nobpt (CORE_ADDR memaddr
, char *myaddr
, unsigned len
)
628 struct bp_location
*b
;
629 CORE_ADDR bp_addr
= 0;
632 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
633 /* No breakpoints on this machine. */
634 return target_read_memory (memaddr
, myaddr
, len
);
638 if (b
->owner
->type
== bp_none
)
639 warning ("reading through apparently deleted breakpoint #%d?",
642 if (b
->loc_type
!= bp_loc_software_breakpoint
)
646 /* Addresses and length of the part of the breakpoint that
648 /* XXXX The m68k, sh and h8300 have different local and remote
649 breakpoint values. BREAKPOINT_FROM_PC still manages to
650 correctly determine the breakpoints memory address and size
651 for these targets. */
652 bp_addr
= b
->address
;
654 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
659 if (bp_addr
+ bp_size
<= memaddr
)
660 /* The breakpoint is entirely before the chunk of memory we
663 if (bp_addr
>= memaddr
+ len
)
664 /* The breakpoint is entirely after the chunk of memory we are
667 /* Copy the breakpoint from the shadow contents, and recurse for
668 the things before and after. */
670 /* Offset within shadow_contents. */
673 if (bp_addr
< memaddr
)
675 /* Only copy the second part of the breakpoint. */
676 bp_size
-= memaddr
- bp_addr
;
677 bptoffset
= memaddr
- bp_addr
;
681 if (bp_addr
+ bp_size
> memaddr
+ len
)
683 /* Only copy the first part of the breakpoint. */
684 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
687 memcpy (myaddr
+ bp_addr
- memaddr
,
688 b
->shadow_contents
+ bptoffset
, bp_size
);
690 if (bp_addr
> memaddr
)
692 /* Copy the section of memory before the breakpoint. */
693 status
= read_memory_nobpt (memaddr
, myaddr
, bp_addr
- memaddr
);
698 if (bp_addr
+ bp_size
< memaddr
+ len
)
700 /* Copy the section of memory after the breakpoint. */
701 status
= read_memory_nobpt (bp_addr
+ bp_size
,
702 myaddr
+ bp_addr
+ bp_size
- memaddr
,
703 memaddr
+ len
- (bp_addr
+ bp_size
));
710 /* Nothing overlaps. Just call read_memory_noerr. */
711 return target_read_memory (memaddr
, myaddr
, len
);
715 /* A wrapper function for inserting catchpoints. */
717 insert_catchpoint (struct ui_out
*uo
, void *args
)
719 struct breakpoint
*b
= (struct breakpoint
*) args
;
725 val
= target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
728 val
= target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
731 val
= target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
734 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
739 throw_exception (RETURN_ERROR
);
744 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
745 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
746 PROCESS_WARNING, and HW_BREAKPOINT_ERROR are used to report problems.
748 NOTE drow/2003-09-09: This routine could be broken down to an object-style
749 method for each breakpoint or catchpoint type. */
751 insert_bp_location (struct bp_location
*bpt
,
752 struct ui_file
*tmp_error_stream
,
753 int *disabled_breaks
, int *process_warning
,
754 int *hw_breakpoint_error
)
758 /* Permanent breakpoints cannot be inserted or removed. Disabled
759 breakpoints should not be inserted. */
760 if (bpt
->owner
->enable_state
!= bp_enabled
)
763 if (bpt
->inserted
|| bpt
->duplicate
)
766 if (bpt
->loc_type
== bp_loc_software_breakpoint
767 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
769 /* First check to see if we have to handle an overlay. */
770 if (overlay_debugging
== ovly_off
771 || bpt
->section
== NULL
772 || !(section_is_overlay (bpt
->section
)))
774 /* No overlay handling: just set the breakpoint. */
776 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
777 val
= target_insert_hw_breakpoint (bpt
->address
,
778 bpt
->shadow_contents
);
780 val
= target_insert_breakpoint (bpt
->address
,
781 bpt
->shadow_contents
);
785 /* This breakpoint is in an overlay section.
786 Shall we set a breakpoint at the LMA? */
787 if (!overlay_events_enabled
)
789 /* Yes -- overlay event support is not active,
790 so we must try to set a breakpoint at the LMA.
791 This will not work for a hardware breakpoint. */
792 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
793 warning ("hardware breakpoint %d not supported in overlay!\n",
797 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
799 /* Set a software (trap) breakpoint at the LMA. */
800 val
= target_insert_breakpoint (addr
, bpt
->shadow_contents
);
802 fprintf_unfiltered (tmp_error_stream
,
803 "Overlay breakpoint %d failed: in ROM?",
807 /* Shall we set a breakpoint at the VMA? */
808 if (section_is_mapped (bpt
->section
))
810 /* Yes. This overlay section is mapped into memory. */
811 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
812 val
= target_insert_hw_breakpoint (bpt
->address
,
813 bpt
->shadow_contents
);
815 val
= target_insert_breakpoint (bpt
->address
,
816 bpt
->shadow_contents
);
820 /* No. This breakpoint will not be inserted.
821 No error, but do not mark the bp as 'inserted'. */
828 /* Can't set the breakpoint. */
829 #if defined (DISABLE_UNSETTABLE_BREAK)
830 if (DISABLE_UNSETTABLE_BREAK (bpt
->address
))
832 /* See also: disable_breakpoints_in_shlibs. */
834 bpt
->owner
->enable_state
= bp_shlib_disabled
;
835 if (!*disabled_breaks
)
837 fprintf_unfiltered (tmp_error_stream
,
838 "Cannot insert breakpoint %d.\n",
840 fprintf_unfiltered (tmp_error_stream
,
841 "Temporarily disabling shared library breakpoints:\n");
843 *disabled_breaks
= 1;
844 fprintf_unfiltered (tmp_error_stream
,
845 "breakpoint #%d\n", bpt
->owner
->number
);
850 #ifdef ONE_PROCESS_WRITETEXT
851 *process_warning
= 1;
853 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
855 *hw_breakpoint_error
= 1;
856 fprintf_unfiltered (tmp_error_stream
,
857 "Cannot insert hardware breakpoint %d.\n",
862 fprintf_unfiltered (tmp_error_stream
,
863 "Cannot insert breakpoint %d.\n",
865 fprintf_filtered (tmp_error_stream
,
866 "Error accessing memory address ");
867 print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
868 fprintf_filtered (tmp_error_stream
, ": %s.\n",
869 safe_strerror (val
));
880 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
881 /* NOTE drow/2003-09-08: This state only exists for removing
882 watchpoints. It's not clear that it's necessary... */
883 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
885 /* FIXME drow/2003-09-08: This code sets multiple hardware watchpoints
886 based on the expression. Ideally this should happen at a higher level,
887 and there should be one bp_location for each computed address we
888 must watch. As soon as a many-to-one mapping is available I'll
891 struct frame_info
*saved_frame
;
892 int saved_level
, within_current_scope
;
893 struct value
*mark
= value_mark ();
896 /* Save the current frame and level so we can restore it after
897 evaluating the watchpoint expression on its own frame. */
898 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
899 took a frame parameter, so that we didn't have to change the
901 saved_frame
= deprecated_selected_frame
;
902 saved_level
= frame_relative_level (deprecated_selected_frame
);
904 /* Determine if the watchpoint is within scope. */
905 if (bpt
->owner
->exp_valid_block
== NULL
)
906 within_current_scope
= 1;
909 struct frame_info
*fi
;
910 fi
= frame_find_by_id (bpt
->owner
->watchpoint_frame
);
911 within_current_scope
= (fi
!= NULL
);
912 if (within_current_scope
)
916 if (within_current_scope
)
918 /* Evaluate the expression and cut the chain of values
919 produced off from the value chain.
921 Make sure the value returned isn't lazy; we use
922 laziness to determine what memory GDB actually needed
923 in order to compute the value of the expression. */
924 v
= evaluate_expression (bpt
->owner
->exp
);
926 value_release_to_mark (mark
);
928 bpt
->owner
->val_chain
= v
;
931 /* Look at each value on the value chain. */
932 for (; v
; v
= v
->next
)
934 /* If it's a memory location, and GDB actually needed
935 its contents to evaluate the expression, then we
937 if (VALUE_LVAL (v
) == lval_memory
940 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
942 /* We only watch structs and arrays if user asked
943 for it explicitly, never if they just happen to
944 appear in the middle of some value chain. */
945 if (v
== bpt
->owner
->val_chain
946 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
947 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
952 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
953 len
= TYPE_LENGTH (VALUE_TYPE (v
));
955 if (bpt
->owner
->type
== bp_read_watchpoint
)
957 else if (bpt
->owner
->type
== bp_access_watchpoint
)
960 val
= target_insert_watchpoint (addr
, len
, type
);
963 /* Don't exit the loop, try to insert
964 every value on the value chain. That's
965 because we will be removing all the
966 watches below, and removing a
967 watchpoint we didn't insert could have
975 /* Failure to insert a watchpoint on any memory value in the
976 value chain brings us here. */
979 remove_breakpoint (bpt
, mark_uninserted
);
980 *hw_breakpoint_error
= 1;
981 fprintf_unfiltered (tmp_error_stream
,
982 "Could not insert hardware watchpoint %d.\n",
989 printf_filtered ("Hardware watchpoint %d deleted ", bpt
->owner
->number
);
990 printf_filtered ("because the program has left the block \n");
991 printf_filtered ("in which its expression is valid.\n");
992 if (bpt
->owner
->related_breakpoint
)
993 bpt
->owner
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
994 bpt
->owner
->disposition
= disp_del_at_next_stop
;
997 /* Restore the frame and level. */
998 if (saved_frame
!= deprecated_selected_frame
999 || saved_level
!= frame_relative_level (deprecated_selected_frame
))
1000 select_frame (saved_frame
);
1005 else if (ep_is_exception_catchpoint (bpt
->owner
))
1007 /* FIXME drow/2003-09-09: This code sets both a catchpoint and a
1008 breakpoint. Once again, it would be better if this was represented
1009 as two bp_locations. */
1011 /* If we get here, we must have a callback mechanism for exception
1012 events -- with g++ style embedded label support, we insert
1013 ordinary breakpoints and not catchpoints. */
1014 val
= target_insert_breakpoint (bpt
->address
, bpt
->shadow_contents
);
1017 /* Couldn't set breakpoint for some reason */
1018 fprintf_unfiltered (tmp_error_stream
,
1019 "Cannot insert catchpoint %d; disabling it.\n",
1020 bpt
->owner
->number
);
1021 fprintf_filtered (tmp_error_stream
,
1022 "Error accessing memory address ");
1023 print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
1024 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1025 safe_strerror (val
));
1026 bpt
->owner
->enable_state
= bp_disabled
;
1030 /* Bp set, now make sure callbacks are enabled */
1031 /* Format possible error msg */
1032 char *message
= xstrprintf ("Error inserting catchpoint %d:\n",
1033 bpt
->owner
->number
);
1034 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
1036 args_for_catchpoint_enable args
;
1037 args
.kind
= bpt
->owner
->type
== bp_catch_catch
?
1038 EX_EVENT_CATCH
: EX_EVENT_THROW
;
1040 val
= catch_errors (cover_target_enable_exception_callback
,
1041 &args
, message
, RETURN_MASK_ALL
);
1042 do_cleanups (cleanups
);
1043 if (val
!= 0 && val
!= -1)
1046 /* Check if something went wrong; val == 0 can be ignored */
1049 /* something went wrong */
1050 fprintf_unfiltered (tmp_error_stream
,
1051 "Cannot insert catchpoint %d; disabling it.\n",
1052 bpt
->owner
->number
);
1053 bpt
->owner
->enable_state
= bp_disabled
;
1060 else if (bpt
->owner
->type
== bp_catch_fork
1061 || bpt
->owner
->type
== bp_catch_vfork
1062 || bpt
->owner
->type
== bp_catch_exec
)
1064 char *prefix
= xstrprintf ("warning: inserting catchpoint %d: ",
1065 bpt
->owner
->number
);
1066 struct cleanup
*cleanups
= make_cleanup (xfree
, prefix
);
1067 val
= catch_exceptions (uiout
, insert_catchpoint
, bpt
->owner
, prefix
,
1069 do_cleanups (cleanups
);
1071 bpt
->owner
->enable_state
= bp_disabled
;
1080 /* insert_breakpoints is used when starting or continuing the program.
1081 remove_breakpoints is used when the program stops.
1082 Both return zero if successful,
1083 or an `errno' value if could not write the inferior. */
1086 insert_breakpoints (void)
1088 struct bp_location
*b
, *temp
;
1089 int return_val
= 0; /* return success code. */
1091 int disabled_breaks
= 0;
1092 int hw_breakpoint_error
= 0;
1093 int process_warning
= 0;
1095 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1096 make_cleanup_ui_file_delete (tmp_error_stream
);
1098 /* Explicitly mark the warning -- this will only be printed if
1099 there was an error. */
1100 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1102 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1104 /* Permanent breakpoints cannot be inserted or removed. Disabled
1105 breakpoints should not be inserted. */
1106 if (b
->owner
->enable_state
!= bp_enabled
)
1109 /* FIXME drow/2003-10-07: This code should be pushed elsewhere when
1110 hardware watchpoints are split into multiple loc breakpoints. */
1111 if ((b
->loc_type
== bp_loc_hardware_watchpoint
1112 || b
->owner
->type
== bp_watchpoint
) && !b
->owner
->val
)
1115 val
= evaluate_expression (b
->owner
->exp
);
1116 release_value (val
);
1117 if (VALUE_LAZY (val
))
1118 value_fetch_lazy (val
);
1119 b
->owner
->val
= val
;
1122 val
= insert_bp_location (b
, tmp_error_stream
,
1123 &disabled_breaks
, &process_warning
,
1124 &hw_breakpoint_error
);
1131 /* If a hardware breakpoint or watchpoint was inserted, add a
1132 message about possibly exhausted resources. */
1133 if (hw_breakpoint_error
)
1135 fprintf_unfiltered (tmp_error_stream
,
1136 "Could not insert hardware breakpoints:\n\
1137 You may have requested too many hardware breakpoints/watchpoints.\n");
1139 #ifdef ONE_PROCESS_WRITETEXT
1140 if (process_warning
)
1141 fprintf_unfiltered (tmp_error_stream
,
1142 "The same program may be running in another process.");
1144 target_terminal_ours_for_output ();
1145 error_stream (tmp_error_stream
);
1151 remove_breakpoints (void)
1153 struct bp_location
*b
;
1156 ALL_BP_LOCATIONS (b
)
1160 val
= remove_breakpoint (b
, mark_uninserted
);
1169 remove_hw_watchpoints (void)
1171 struct bp_location
*b
;
1174 ALL_BP_LOCATIONS (b
)
1176 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1178 val
= remove_breakpoint (b
, mark_uninserted
);
1187 reattach_breakpoints (int pid
)
1189 struct bp_location
*b
;
1191 struct cleanup
*old_chain
= save_inferior_ptid ();
1193 /* Set inferior_ptid; remove_breakpoint uses this global. */
1194 inferior_ptid
= pid_to_ptid (pid
);
1195 ALL_BP_LOCATIONS (b
)
1199 remove_breakpoint (b
, mark_inserted
);
1200 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1201 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
1203 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
1204 /* FIXME drow/2003-10-07: This doesn't handle any other kinds of
1205 breakpoints. It's wrong for watchpoints, for example. */
1208 do_cleanups (old_chain
);
1213 do_cleanups (old_chain
);
1218 update_breakpoints_after_exec (void)
1220 struct breakpoint
*b
;
1221 struct breakpoint
*temp
;
1223 /* Doing this first prevents the badness of having delete_breakpoint()
1224 write a breakpoint's current "shadow contents" to lift the bp. That
1225 shadow is NOT valid after an exec()! */
1226 mark_breakpoints_out ();
1228 ALL_BREAKPOINTS_SAFE (b
, temp
)
1230 /* Solib breakpoints must be explicitly reset after an exec(). */
1231 if (b
->type
== bp_shlib_event
)
1233 delete_breakpoint (b
);
1237 /* Thread event breakpoints must be set anew after an exec(),
1238 as must overlay event breakpoints. */
1239 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1241 delete_breakpoint (b
);
1245 /* Step-resume breakpoints are meaningless after an exec(). */
1246 if (b
->type
== bp_step_resume
)
1248 delete_breakpoint (b
);
1252 /* Ditto the sigtramp handler breakpoints. */
1253 if (b
->type
== bp_through_sigtramp
)
1255 delete_breakpoint (b
);
1259 /* Ditto the exception-handling catchpoints. */
1260 if ((b
->type
== bp_catch_catch
) || (b
->type
== bp_catch_throw
))
1262 delete_breakpoint (b
);
1266 /* Don't delete an exec catchpoint, because else the inferior
1267 won't stop when it ought!
1269 Similarly, we probably ought to keep vfork catchpoints, 'cause
1270 on this target, we may not be able to stop when the vfork is
1271 seen, but only when the subsequent exec is seen. (And because
1272 deleting fork catchpoints here but not vfork catchpoints will
1273 seem mysterious to users, keep those too.)
1275 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1276 target address field, if any, is sufficient to have it be reset
1277 automagically. Certainly on HP-UX that's true.
1279 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1280 valid code address on some platforms (like the mn10300
1281 simulators). We shouldn't assign any special interpretation to
1282 a breakpoint with a zero address. And in fact, GDB doesn't ---
1283 I can't see what that comment above is talking about. As far
1284 as I can tell, setting the address of a
1285 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1286 is meaningless, since those are implemented with HP-UX kernel
1287 hackery, not by storing breakpoint instructions somewhere. */
1288 if ((b
->type
== bp_catch_exec
) ||
1289 (b
->type
== bp_catch_vfork
) ||
1290 (b
->type
== bp_catch_fork
))
1292 b
->loc
->address
= (CORE_ADDR
) NULL
;
1296 /* bp_finish is a special case. The only way we ought to be able
1297 to see one of these when an exec() has happened, is if the user
1298 caught a vfork, and then said "finish". Ordinarily a finish just
1299 carries them to the call-site of the current callee, by setting
1300 a temporary bp there and resuming. But in this case, the finish
1301 will carry them entirely through the vfork & exec.
1303 We don't want to allow a bp_finish to remain inserted now. But
1304 we can't safely delete it, 'cause finish_command has a handle to
1305 the bp on a bpstat, and will later want to delete it. There's a
1306 chance (and I've seen it happen) that if we delete the bp_finish
1307 here, that its storage will get reused by the time finish_command
1308 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1309 We really must allow finish_command to delete a bp_finish.
1311 In the absense of a general solution for the "how do we know
1312 it's safe to delete something others may have handles to?"
1313 problem, what we'll do here is just uninsert the bp_finish, and
1314 let finish_command delete it.
1316 (We know the bp_finish is "doomed" in the sense that it's
1317 momentary, and will be deleted as soon as finish_command sees
1318 the inferior stopped. So it doesn't matter that the bp's
1319 address is probably bogus in the new a.out, unlike e.g., the
1320 solib breakpoints.) */
1322 if (b
->type
== bp_finish
)
1327 /* Without a symbolic address, we have little hope of the
1328 pre-exec() address meaning the same thing in the post-exec()
1330 if (b
->addr_string
== NULL
)
1332 delete_breakpoint (b
);
1336 /* If this breakpoint has survived the above battery of checks, then
1337 it must have a symbolic address. Be sure that it gets reevaluated
1338 to a target address, rather than reusing the old evaluation.
1340 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1341 for bp_catch_exec and friends, I'm pretty sure this is entirely
1342 unnecessary. A call to breakpoint_re_set_one always recomputes
1343 the breakpoint's address from scratch, or deletes it if it can't.
1344 So I think this assignment could be deleted without effect. */
1345 b
->loc
->address
= (CORE_ADDR
) NULL
;
1347 /* FIXME what about longjmp breakpoints? Re-create them here? */
1348 create_overlay_event_breakpoint ("_ovly_debug_event");
1352 detach_breakpoints (int pid
)
1354 struct bp_location
*b
;
1356 struct cleanup
*old_chain
= save_inferior_ptid ();
1358 if (pid
== PIDGET (inferior_ptid
))
1359 error ("Cannot detach breakpoints of inferior_ptid");
1361 /* Set inferior_ptid; remove_breakpoint uses this global. */
1362 inferior_ptid
= pid_to_ptid (pid
);
1363 ALL_BP_LOCATIONS (b
)
1367 val
= remove_breakpoint (b
, mark_inserted
);
1370 do_cleanups (old_chain
);
1375 do_cleanups (old_chain
);
1380 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1384 if (b
->owner
->enable_state
== bp_permanent
)
1385 /* Permanent breakpoints cannot be inserted or removed. */
1388 if (b
->owner
->type
== bp_none
)
1389 warning ("attempted to remove apparently deleted breakpoint #%d?",
1392 if (b
->loc_type
== bp_loc_software_breakpoint
1393 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1395 /* "Normal" instruction breakpoint: either the standard
1396 trap-instruction bp (bp_breakpoint), or a
1397 bp_hardware_breakpoint. */
1399 /* First check to see if we have to handle an overlay. */
1400 if (overlay_debugging
== ovly_off
1401 || b
->section
== NULL
1402 || !(section_is_overlay (b
->section
)))
1404 /* No overlay handling: just remove the breakpoint. */
1406 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1407 val
= target_remove_hw_breakpoint (b
->address
,
1408 b
->shadow_contents
);
1410 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1414 /* This breakpoint is in an overlay section.
1415 Did we set a breakpoint at the LMA? */
1416 if (!overlay_events_enabled
)
1418 /* Yes -- overlay event support is not active, so we
1419 should have set a breakpoint at the LMA. Remove it.
1421 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
1423 /* Ignore any failures: if the LMA is in ROM, we will
1424 have already warned when we failed to insert it. */
1425 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1426 target_remove_hw_breakpoint (addr
, b
->shadow_contents
);
1428 target_remove_breakpoint (addr
, b
->shadow_contents
);
1430 /* Did we set a breakpoint at the VMA?
1431 If so, we will have marked the breakpoint 'inserted'. */
1434 /* Yes -- remove it. Previously we did not bother to
1435 remove the breakpoint if the section had been
1436 unmapped, but let's not rely on that being safe. We
1437 don't know what the overlay manager might do. */
1438 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1439 val
= target_remove_hw_breakpoint (b
->address
,
1440 b
->shadow_contents
);
1442 val
= target_remove_breakpoint (b
->address
,
1443 b
->shadow_contents
);
1447 /* No -- not inserted, so no need to remove. No error. */
1453 b
->inserted
= (is
== mark_inserted
);
1455 else if (b
->loc_type
== bp_loc_hardware_watchpoint
1456 && b
->owner
->enable_state
== bp_enabled
1462 b
->inserted
= (is
== mark_inserted
);
1463 /* Walk down the saved value chain. */
1464 for (v
= b
->owner
->val_chain
; v
; v
= v
->next
)
1466 /* For each memory reference remove the watchpoint
1468 if (VALUE_LVAL (v
) == lval_memory
1469 && ! VALUE_LAZY (v
))
1471 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
1473 if (v
== b
->owner
->val_chain
1474 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1475 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1480 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
1481 len
= TYPE_LENGTH (VALUE_TYPE (v
));
1483 if (b
->owner
->type
== bp_read_watchpoint
)
1485 else if (b
->owner
->type
== bp_access_watchpoint
)
1488 val
= target_remove_watchpoint (addr
, len
, type
);
1495 /* Failure to remove any of the hardware watchpoints comes here. */
1496 if ((is
== mark_uninserted
) && (b
->inserted
))
1497 warning ("Could not remove hardware watchpoint %d.",
1500 /* Free the saved value chain. We will construct a new one
1501 the next time the watchpoint is inserted. */
1502 for (v
= b
->owner
->val_chain
; v
; v
= n
)
1507 b
->owner
->val_chain
= NULL
;
1509 else if ((b
->owner
->type
== bp_catch_fork
||
1510 b
->owner
->type
== bp_catch_vfork
||
1511 b
->owner
->type
== bp_catch_exec
)
1512 && b
->owner
->enable_state
== bp_enabled
1516 switch (b
->owner
->type
)
1519 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1521 case bp_catch_vfork
:
1522 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1525 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1528 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1533 b
->inserted
= (is
== mark_inserted
);
1535 else if ((b
->owner
->type
== bp_catch_catch
||
1536 b
->owner
->type
== bp_catch_throw
)
1537 && b
->owner
->enable_state
== bp_enabled
1541 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1544 b
->inserted
= (is
== mark_inserted
);
1546 else if (ep_is_exception_catchpoint (b
->owner
)
1547 && b
->inserted
/* sometimes previous insert doesn't happen */
1548 && b
->owner
->enable_state
== bp_enabled
1552 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1556 b
->inserted
= (is
== mark_inserted
);
1562 /* Clear the "inserted" flag in all breakpoints. */
1565 mark_breakpoints_out (void)
1567 struct bp_location
*bpt
;
1569 ALL_BP_LOCATIONS (bpt
)
1573 /* Clear the "inserted" flag in all breakpoints and delete any
1574 breakpoints which should go away between runs of the program.
1576 Plus other such housekeeping that has to be done for breakpoints
1579 Note: this function gets called at the end of a run (by
1580 generic_mourn_inferior) and when a run begins (by
1581 init_wait_for_inferior). */
1586 breakpoint_init_inferior (enum inf_context context
)
1588 struct breakpoint
*b
, *temp
;
1589 struct bp_location
*bpt
;
1590 static int warning_needed
= 0;
1592 ALL_BP_LOCATIONS (bpt
)
1595 ALL_BREAKPOINTS_SAFE (b
, temp
)
1600 case bp_watchpoint_scope
:
1602 /* If the call dummy breakpoint is at the entry point it will
1603 cause problems when the inferior is rerun, so we better
1606 Also get rid of scope breakpoints. */
1607 delete_breakpoint (b
);
1611 case bp_hardware_watchpoint
:
1612 case bp_read_watchpoint
:
1613 case bp_access_watchpoint
:
1615 /* Likewise for watchpoints on local expressions. */
1616 if (b
->exp_valid_block
!= NULL
)
1617 delete_breakpoint (b
);
1618 if (context
== inf_starting
)
1620 /* Reset val field to force reread of starting value
1621 in insert_breakpoints. */
1623 value_free (b
->val
);
1628 /* Likewise for exception catchpoints in dynamic-linked
1629 executables where required */
1630 if (ep_is_exception_catchpoint (b
) &&
1631 exception_catchpoints_are_fragile
)
1634 delete_breakpoint (b
);
1640 if (exception_catchpoints_are_fragile
)
1641 exception_support_initialized
= 0;
1643 /* Don't issue the warning unless it's really needed... */
1644 if (warning_needed
&& (context
!= inf_exited
))
1646 warning ("Exception catchpoints from last run were deleted.");
1647 warning ("You must reinsert them explicitly.");
1652 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1653 exists at PC. It returns ordinary_breakpoint_here if it's an
1654 ordinary breakpoint, or permanent_breakpoint_here if it's a
1655 permanent breakpoint.
1656 - When continuing from a location with an ordinary breakpoint, we
1657 actually single step once before calling insert_breakpoints.
1658 - When continuing from a localion with a permanent breakpoint, we
1659 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1660 the target, to advance the PC past the breakpoint. */
1662 enum breakpoint_here
1663 breakpoint_here_p (CORE_ADDR pc
)
1665 struct bp_location
*bpt
;
1666 int any_breakpoint_here
= 0;
1668 ALL_BP_LOCATIONS (bpt
)
1670 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1671 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1674 if ((bpt
->owner
->enable_state
== bp_enabled
1675 || bpt
->owner
->enable_state
== bp_permanent
)
1676 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1678 if (overlay_debugging
1679 && section_is_overlay (bpt
->section
)
1680 && !section_is_mapped (bpt
->section
))
1681 continue; /* unmapped overlay -- can't be a match */
1682 else if (bpt
->owner
->enable_state
== bp_permanent
)
1683 return permanent_breakpoint_here
;
1685 any_breakpoint_here
= 1;
1689 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1693 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1694 but it only returns true if there is actually a breakpoint inserted
1698 breakpoint_inserted_here_p (CORE_ADDR pc
)
1700 struct bp_location
*bpt
;
1702 ALL_BP_LOCATIONS (bpt
)
1704 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1705 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1709 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1711 if (overlay_debugging
1712 && section_is_overlay (bpt
->section
)
1713 && !section_is_mapped (bpt
->section
))
1714 continue; /* unmapped overlay -- can't be a match */
1723 /* Return nonzero if FRAME is a dummy frame. We can't use
1724 DEPRECATED_PC_IN_CALL_DUMMY because figuring out the saved SP would
1725 take too much time, at least using frame_register() on the 68k.
1726 This means that for this function to work right a port must use the
1727 bp_call_dummy breakpoint. */
1730 deprecated_frame_in_dummy (struct frame_info
*frame
)
1732 struct breakpoint
*b
;
1734 /* This function is used by two files: get_frame_type(), after first
1735 checking that !DEPRECATED_USE_GENERIC_DUMMY_FRAMES; and
1736 sparc-tdep.c, which doesn't yet use generic dummy frames anyway. */
1737 gdb_assert (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES
);
1741 if (b
->type
== bp_call_dummy
1742 && frame_id_eq (b
->frame_id
, get_frame_id (frame
))
1743 /* We need to check the PC as well as the frame on the sparc,
1744 for signals.exp in the testsuite. */
1745 && (get_frame_pc (frame
)
1747 - DEPRECATED_SIZEOF_CALL_DUMMY_WORDS
/ sizeof (LONGEST
) * DEPRECATED_REGISTER_SIZE
))
1748 && get_frame_pc (frame
) <= b
->loc
->address
)
1754 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1755 PC is valid for process/thread PTID. */
1758 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1760 struct bp_location
*bpt
;
1763 thread
= pid_to_thread_id (ptid
);
1765 ALL_BP_LOCATIONS (bpt
)
1767 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1768 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1771 if ((bpt
->owner
->enable_state
== bp_enabled
1772 || bpt
->owner
->enable_state
== bp_permanent
)
1773 && bpt
->address
== pc
1774 && (bpt
->owner
->thread
== -1 || bpt
->owner
->thread
== thread
))
1776 if (overlay_debugging
1777 && section_is_overlay (bpt
->section
)
1778 && !section_is_mapped (bpt
->section
))
1779 continue; /* unmapped overlay -- can't be a match */
1789 /* bpstat stuff. External routines' interfaces are documented
1793 ep_is_catchpoint (struct breakpoint
*ep
)
1796 (ep
->type
== bp_catch_load
)
1797 || (ep
->type
== bp_catch_unload
)
1798 || (ep
->type
== bp_catch_fork
)
1799 || (ep
->type
== bp_catch_vfork
)
1800 || (ep
->type
== bp_catch_exec
)
1801 || (ep
->type
== bp_catch_catch
)
1802 || (ep
->type
== bp_catch_throw
);
1804 /* ??rehrauer: Add more kinds here, as are implemented... */
1808 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1811 (ep
->type
== bp_catch_load
)
1812 || (ep
->type
== bp_catch_unload
);
1816 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1819 (ep
->type
== bp_catch_catch
)
1820 || (ep
->type
== bp_catch_throw
);
1823 /* Clear a bpstat so that it says we are not at any breakpoint.
1824 Also free any storage that is part of a bpstat. */
1827 bpstat_clear (bpstat
*bsp
)
1838 if (p
->old_val
!= NULL
)
1839 value_free (p
->old_val
);
1840 free_command_lines (&p
->commands
);
1847 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1848 is part of the bpstat is copied as well. */
1851 bpstat_copy (bpstat bs
)
1855 bpstat retval
= NULL
;
1860 for (; bs
!= NULL
; bs
= bs
->next
)
1862 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1863 memcpy (tmp
, bs
, sizeof (*tmp
));
1864 if (bs
->commands
!= NULL
)
1865 tmp
->commands
= copy_command_lines (bs
->commands
);
1866 if (bs
->old_val
!= NULL
)
1867 tmp
->old_val
= value_copy (bs
->old_val
);
1870 /* This is the first thing in the chain. */
1880 /* Find the bpstat associated with this breakpoint */
1883 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1888 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1890 if (bsp
->breakpoint_at
== breakpoint
)
1896 /* Find a step_resume breakpoint associated with this bpstat.
1897 (If there are multiple step_resume bp's on the list, this function
1898 will arbitrarily pick one.)
1900 It is an error to use this function if BPSTAT doesn't contain a
1901 step_resume breakpoint.
1903 See wait_for_inferior's use of this function. */
1905 bpstat_find_step_resume_breakpoint (bpstat bsp
)
1910 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1912 current_thread
= pid_to_thread_id (inferior_ptid
);
1914 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1916 if ((bsp
->breakpoint_at
!= NULL
) &&
1917 (bsp
->breakpoint_at
->type
== bp_step_resume
) &&
1918 (bsp
->breakpoint_at
->thread
== current_thread
||
1919 bsp
->breakpoint_at
->thread
== -1))
1920 return bsp
->breakpoint_at
;
1923 error ("Internal error (no step_resume breakpoint found)");
1927 /* Return the breakpoint number of the first breakpoint we are stopped
1928 at. *BSP upon return is a bpstat which points to the remaining
1929 breakpoints stopped at (but which is not guaranteed to be good for
1930 anything but further calls to bpstat_num).
1931 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1934 bpstat_num (bpstat
*bsp
)
1936 struct breakpoint
*b
;
1939 return 0; /* No more breakpoint values */
1942 b
= (*bsp
)->breakpoint_at
;
1943 *bsp
= (*bsp
)->next
;
1945 return -1; /* breakpoint that's been deleted since */
1947 return b
->number
; /* We have its number */
1951 /* Modify BS so that the actions will not be performed. */
1954 bpstat_clear_actions (bpstat bs
)
1956 for (; bs
!= NULL
; bs
= bs
->next
)
1958 free_command_lines (&bs
->commands
);
1959 if (bs
->old_val
!= NULL
)
1961 value_free (bs
->old_val
);
1967 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1969 cleanup_executing_breakpoints (void *ignore
)
1971 executing_breakpoint_commands
= 0;
1974 /* Execute all the commands associated with all the breakpoints at this
1975 location. Any of these commands could cause the process to proceed
1976 beyond this point, etc. We look out for such changes by checking
1977 the global "breakpoint_proceeded" after each command. */
1980 bpstat_do_actions (bpstat
*bsp
)
1983 struct cleanup
*old_chain
;
1984 struct command_line
*cmd
;
1986 /* Avoid endless recursion if a `source' command is contained
1988 if (executing_breakpoint_commands
)
1991 executing_breakpoint_commands
= 1;
1992 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
1995 /* Note that (as of this writing), our callers all appear to
1996 be passing us the address of global stop_bpstat. And, if
1997 our calls to execute_control_command cause the inferior to
1998 proceed, that global (and hence, *bsp) will change.
2000 We must be careful to not touch *bsp unless the inferior
2001 has not proceeded. */
2003 /* This pointer will iterate over the list of bpstat's. */
2006 breakpoint_proceeded
= 0;
2007 for (; bs
!= NULL
; bs
= bs
->next
)
2012 execute_control_command (cmd
);
2014 if (breakpoint_proceeded
)
2019 if (breakpoint_proceeded
)
2020 /* The inferior is proceeded by the command; bomb out now.
2021 The bpstat chain has been blown away by wait_for_inferior.
2022 But since execution has stopped again, there is a new bpstat
2023 to look at, so start over. */
2026 free_command_lines (&bs
->commands
);
2028 do_cleanups (old_chain
);
2031 /* This is the normal print function for a bpstat. In the future,
2032 much of this logic could (should?) be moved to bpstat_stop_status,
2033 by having it set different print_it values.
2035 Current scheme: When we stop, bpstat_print() is called. It loops
2036 through the bpstat list of things causing this stop, calling the
2037 print_bp_stop_message function on each one. The behavior of the
2038 print_bp_stop_message function depends on the print_it field of
2039 bpstat. If such field so indicates, call this function here.
2041 Return values from this routine (ultimately used by bpstat_print()
2042 and normal_stop() to decide what to do):
2043 PRINT_NOTHING: Means we already printed all we needed to print,
2044 don't print anything else.
2045 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2046 that something to be followed by a location.
2047 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2048 that something to be followed by a location.
2049 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2052 static enum print_stop_action
2053 print_it_typical (bpstat bs
)
2055 struct cleanup
*old_chain
, *ui_out_chain
;
2056 struct ui_stream
*stb
;
2057 stb
= ui_out_stream_new (uiout
);
2058 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2059 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2060 which has since been deleted. */
2061 if (bs
->breakpoint_at
== NULL
)
2062 return PRINT_UNKNOWN
;
2064 switch (bs
->breakpoint_at
->type
)
2067 case bp_hardware_breakpoint
:
2068 if (bs
->breakpoint_at
->loc
->address
!= bs
->breakpoint_at
->loc
->requested_address
)
2069 breakpoint_adjustment_warning (bs
->breakpoint_at
->loc
->requested_address
,
2070 bs
->breakpoint_at
->loc
->address
,
2071 bs
->breakpoint_at
->number
, 1);
2072 annotate_breakpoint (bs
->breakpoint_at
->number
);
2073 ui_out_text (uiout
, "\nBreakpoint ");
2074 if (ui_out_is_mi_like_p (uiout
))
2075 ui_out_field_string (uiout
, "reason", "breakpoint-hit");
2076 ui_out_field_int (uiout
, "bkptno", bs
->breakpoint_at
->number
);
2077 ui_out_text (uiout
, ", ");
2078 return PRINT_SRC_AND_LOC
;
2081 case bp_shlib_event
:
2082 /* Did we stop because the user set the stop_on_solib_events
2083 variable? (If so, we report this as a generic, "Stopped due
2084 to shlib event" message.) */
2085 printf_filtered ("Stopped due to shared library event\n");
2086 return PRINT_NOTHING
;
2089 case bp_thread_event
:
2090 /* Not sure how we will get here.
2091 GDB should not stop for these breakpoints. */
2092 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
2093 return PRINT_NOTHING
;
2096 case bp_overlay_event
:
2097 /* By analogy with the thread event, GDB should not stop for these. */
2098 printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n");
2099 return PRINT_NOTHING
;
2103 annotate_catchpoint (bs
->breakpoint_at
->number
);
2104 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2105 printf_filtered ("loaded");
2106 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2107 return PRINT_SRC_AND_LOC
;
2110 case bp_catch_unload
:
2111 annotate_catchpoint (bs
->breakpoint_at
->number
);
2112 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2113 printf_filtered ("unloaded");
2114 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2115 return PRINT_SRC_AND_LOC
;
2119 annotate_catchpoint (bs
->breakpoint_at
->number
);
2120 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2121 printf_filtered ("forked");
2122 printf_filtered (" process %d), ",
2123 bs
->breakpoint_at
->forked_inferior_pid
);
2124 return PRINT_SRC_AND_LOC
;
2127 case bp_catch_vfork
:
2128 annotate_catchpoint (bs
->breakpoint_at
->number
);
2129 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2130 printf_filtered ("vforked");
2131 printf_filtered (" process %d), ",
2132 bs
->breakpoint_at
->forked_inferior_pid
);
2133 return PRINT_SRC_AND_LOC
;
2137 annotate_catchpoint (bs
->breakpoint_at
->number
);
2138 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
2139 bs
->breakpoint_at
->number
,
2140 bs
->breakpoint_at
->exec_pathname
);
2141 return PRINT_SRC_AND_LOC
;
2144 case bp_catch_catch
:
2145 if (current_exception_event
&&
2146 (CURRENT_EXCEPTION_KIND
== EX_EVENT_CATCH
))
2148 annotate_catchpoint (bs
->breakpoint_at
->number
);
2149 printf_filtered ("\nCatchpoint %d (exception caught), ",
2150 bs
->breakpoint_at
->number
);
2151 printf_filtered ("throw location ");
2152 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2153 printf_filtered ("%s:%d",
2154 CURRENT_EXCEPTION_THROW_FILE
,
2155 CURRENT_EXCEPTION_THROW_LINE
);
2157 printf_filtered ("unknown");
2159 printf_filtered (", catch location ");
2160 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2161 printf_filtered ("%s:%d",
2162 CURRENT_EXCEPTION_CATCH_FILE
,
2163 CURRENT_EXCEPTION_CATCH_LINE
);
2165 printf_filtered ("unknown");
2167 printf_filtered ("\n");
2168 /* don't bother to print location frame info */
2169 return PRINT_SRC_ONLY
;
2173 /* really throw, some other bpstat will handle it */
2174 return PRINT_UNKNOWN
;
2178 case bp_catch_throw
:
2179 if (current_exception_event
&&
2180 (CURRENT_EXCEPTION_KIND
== EX_EVENT_THROW
))
2182 annotate_catchpoint (bs
->breakpoint_at
->number
);
2183 printf_filtered ("\nCatchpoint %d (exception thrown), ",
2184 bs
->breakpoint_at
->number
);
2185 printf_filtered ("throw location ");
2186 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2187 printf_filtered ("%s:%d",
2188 CURRENT_EXCEPTION_THROW_FILE
,
2189 CURRENT_EXCEPTION_THROW_LINE
);
2191 printf_filtered ("unknown");
2193 printf_filtered (", catch location ");
2194 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2195 printf_filtered ("%s:%d",
2196 CURRENT_EXCEPTION_CATCH_FILE
,
2197 CURRENT_EXCEPTION_CATCH_LINE
);
2199 printf_filtered ("unknown");
2201 printf_filtered ("\n");
2202 /* don't bother to print location frame info */
2203 return PRINT_SRC_ONLY
;
2207 /* really catch, some other bpstat will handle it */
2208 return PRINT_UNKNOWN
;
2213 case bp_hardware_watchpoint
:
2214 if (bs
->old_val
!= NULL
)
2216 annotate_watchpoint (bs
->breakpoint_at
->number
);
2217 if (ui_out_is_mi_like_p (uiout
))
2218 ui_out_field_string (uiout
, "reason", "watchpoint-trigger");
2219 mention (bs
->breakpoint_at
);
2220 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2221 ui_out_text (uiout
, "\nOld value = ");
2222 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2223 ui_out_field_stream (uiout
, "old", stb
);
2224 ui_out_text (uiout
, "\nNew value = ");
2225 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2226 ui_out_field_stream (uiout
, "new", stb
);
2227 do_cleanups (ui_out_chain
);
2228 ui_out_text (uiout
, "\n");
2229 value_free (bs
->old_val
);
2232 /* More than one watchpoint may have been triggered. */
2233 return PRINT_UNKNOWN
;
2236 case bp_read_watchpoint
:
2237 if (ui_out_is_mi_like_p (uiout
))
2238 ui_out_field_string (uiout
, "reason", "read-watchpoint-trigger");
2239 mention (bs
->breakpoint_at
);
2240 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2241 ui_out_text (uiout
, "\nValue = ");
2242 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2243 ui_out_field_stream (uiout
, "value", stb
);
2244 do_cleanups (ui_out_chain
);
2245 ui_out_text (uiout
, "\n");
2246 return PRINT_UNKNOWN
;
2249 case bp_access_watchpoint
:
2250 if (bs
->old_val
!= NULL
)
2252 annotate_watchpoint (bs
->breakpoint_at
->number
);
2253 if (ui_out_is_mi_like_p (uiout
))
2254 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2255 mention (bs
->breakpoint_at
);
2256 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2257 ui_out_text (uiout
, "\nOld value = ");
2258 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2259 ui_out_field_stream (uiout
, "old", stb
);
2260 value_free (bs
->old_val
);
2262 ui_out_text (uiout
, "\nNew value = ");
2266 mention (bs
->breakpoint_at
);
2267 if (ui_out_is_mi_like_p (uiout
))
2268 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2269 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2270 ui_out_text (uiout
, "\nValue = ");
2272 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0,Val_pretty_default
);
2273 ui_out_field_stream (uiout
, "new", stb
);
2274 do_cleanups (ui_out_chain
);
2275 ui_out_text (uiout
, "\n");
2276 return PRINT_UNKNOWN
;
2279 /* Fall through, we don't deal with these types of breakpoints
2283 if (ui_out_is_mi_like_p (uiout
))
2284 ui_out_field_string (uiout
, "reason", "function-finished");
2285 return PRINT_UNKNOWN
;
2289 if (ui_out_is_mi_like_p (uiout
))
2290 ui_out_field_string (uiout
, "reason", "location-reached");
2291 return PRINT_UNKNOWN
;
2296 case bp_longjmp_resume
:
2297 case bp_step_resume
:
2298 case bp_through_sigtramp
:
2299 case bp_watchpoint_scope
:
2302 return PRINT_UNKNOWN
;
2306 /* Generic routine for printing messages indicating why we
2307 stopped. The behavior of this function depends on the value
2308 'print_it' in the bpstat structure. Under some circumstances we
2309 may decide not to print anything here and delegate the task to
2312 static enum print_stop_action
2313 print_bp_stop_message (bpstat bs
)
2315 switch (bs
->print_it
)
2318 /* Nothing should be printed for this bpstat entry. */
2319 return PRINT_UNKNOWN
;
2323 /* We still want to print the frame, but we already printed the
2324 relevant messages. */
2325 return PRINT_SRC_AND_LOC
;
2328 case print_it_normal
:
2329 /* Normal case. Call the breakpoint's print_it method, or
2330 print_it_typical. */
2331 if (bs
->breakpoint_at
!= NULL
&& bs
->breakpoint_at
->ops
!= NULL
2332 && bs
->breakpoint_at
->ops
->print_it
!= NULL
)
2333 return bs
->breakpoint_at
->ops
->print_it (bs
->breakpoint_at
);
2335 return print_it_typical (bs
);
2339 internal_error (__FILE__
, __LINE__
,
2340 "print_bp_stop_message: unrecognized enum value");
2345 /* Print a message indicating what happened. This is called from
2346 normal_stop(). The input to this routine is the head of the bpstat
2347 list - a list of the eventpoints that caused this stop. This
2348 routine calls the generic print routine for printing a message
2349 about reasons for stopping. This will print (for example) the
2350 "Breakpoint n," part of the output. The return value of this
2353 PRINT_UNKNOWN: Means we printed nothing
2354 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2355 code to print the location. An example is
2356 "Breakpoint 1, " which should be followed by
2358 PRINT_SRC_ONLY: Means we printed something, but there is no need
2359 to also print the location part of the message.
2360 An example is the catch/throw messages, which
2361 don't require a location appended to the end.
2362 PRINT_NOTHING: We have done some printing and we don't need any
2363 further info to be printed.*/
2365 enum print_stop_action
2366 bpstat_print (bpstat bs
)
2370 /* Maybe another breakpoint in the chain caused us to stop.
2371 (Currently all watchpoints go on the bpstat whether hit or not.
2372 That probably could (should) be changed, provided care is taken
2373 with respect to bpstat_explains_signal). */
2374 for (; bs
; bs
= bs
->next
)
2376 val
= print_bp_stop_message (bs
);
2377 if (val
== PRINT_SRC_ONLY
2378 || val
== PRINT_SRC_AND_LOC
2379 || val
== PRINT_NOTHING
)
2383 /* We reached the end of the chain, or we got a null BS to start
2384 with and nothing was printed. */
2385 return PRINT_UNKNOWN
;
2388 /* Evaluate the expression EXP and return 1 if value is zero.
2389 This is used inside a catch_errors to evaluate the breakpoint condition.
2390 The argument is a "struct expression *" that has been cast to char * to
2391 make it pass through catch_errors. */
2394 breakpoint_cond_eval (void *exp
)
2396 struct value
*mark
= value_mark ();
2397 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2398 value_free_to_mark (mark
);
2402 /* Allocate a new bpstat and chain it to the current one. */
2405 bpstat_alloc (struct breakpoint
*b
, bpstat cbs
/* Current "bs" value */ )
2409 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2411 bs
->breakpoint_at
= b
;
2412 /* If the condition is false, etc., don't do the commands. */
2413 bs
->commands
= NULL
;
2415 bs
->print_it
= print_it_normal
;
2419 /* Possible return values for watchpoint_check (this can't be an enum
2420 because of check_errors). */
2421 /* The watchpoint has been deleted. */
2422 #define WP_DELETED 1
2423 /* The value has changed. */
2424 #define WP_VALUE_CHANGED 2
2425 /* The value has not changed. */
2426 #define WP_VALUE_NOT_CHANGED 3
2428 #define BP_TEMPFLAG 1
2429 #define BP_HARDWAREFLAG 2
2431 /* Check watchpoint condition. */
2434 watchpoint_check (void *p
)
2436 bpstat bs
= (bpstat
) p
;
2437 struct breakpoint
*b
;
2438 struct frame_info
*fr
;
2439 int within_current_scope
;
2441 struct frame_id current_frame_id
;
2444 b
= bs
->breakpoint_at
;
2446 if (b
->exp_valid_block
== NULL
)
2447 within_current_scope
= 1;
2450 /* There is no current frame at this moment. If we're going to have
2451 any chance of handling watchpoints on local variables, we'll need
2452 the frame chain (so we can determine if we're in scope). */
2453 reinit_frame_cache ();
2454 fr
= frame_find_by_id (b
->watchpoint_frame
);
2455 within_current_scope
= (fr
!= NULL
);
2456 /* in_function_epilogue_p() returns a non-zero value if we're still
2457 in the function but the stack frame has already been invalidated.
2458 Since we can't rely on the values of local variables after the
2459 stack has been destroyed, we are treating the watchpoint in that
2460 state as `not changed' without further checking.
2462 vinschen/2003-09-04: The former implementation left out the case
2463 that the watchpoint frame couldn't be found by frame_find_by_id()
2464 because the current PC is currently in an epilogue. Calling
2465 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2466 if ((!within_current_scope
|| fr
== get_current_frame ())
2467 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2468 return WP_VALUE_NOT_CHANGED
;
2469 if (fr
&& within_current_scope
)
2470 /* If we end up stopping, the current frame will get selected
2471 in normal_stop. So this call to select_frame won't affect
2476 if (within_current_scope
)
2478 /* We use value_{,free_to_}mark because it could be a
2479 *long* time before we return to the command level and
2480 call free_all_values. We can't call free_all_values because
2481 we might be in the middle of evaluating a function call. */
2483 struct value
*mark
= value_mark ();
2484 struct value
*new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
2485 if (!value_equal (b
->val
, new_val
))
2487 release_value (new_val
);
2488 value_free_to_mark (mark
);
2489 bs
->old_val
= b
->val
;
2491 /* We will stop here */
2492 return WP_VALUE_CHANGED
;
2496 /* Nothing changed, don't do anything. */
2497 value_free_to_mark (mark
);
2498 /* We won't stop here */
2499 return WP_VALUE_NOT_CHANGED
;
2504 /* This seems like the only logical thing to do because
2505 if we temporarily ignored the watchpoint, then when
2506 we reenter the block in which it is valid it contains
2507 garbage (in the case of a function, it may have two
2508 garbage values, one before and one after the prologue).
2509 So we can't even detect the first assignment to it and
2510 watch after that (since the garbage may or may not equal
2511 the first value assigned). */
2512 /* We print all the stop information in print_it_typical(), but
2513 in this case, by the time we call print_it_typical() this bp
2514 will be deleted already. So we have no choice but print the
2515 information here. */
2516 if (ui_out_is_mi_like_p (uiout
))
2517 ui_out_field_string (uiout
, "reason", "watchpoint-scope");
2518 ui_out_text (uiout
, "\nWatchpoint ");
2519 ui_out_field_int (uiout
, "wpnum", bs
->breakpoint_at
->number
);
2520 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2521 which its expression is valid.\n");
2523 if (b
->related_breakpoint
)
2524 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2525 b
->disposition
= disp_del_at_next_stop
;
2531 /* Get a bpstat associated with having just stopped at address *PC
2532 and frame address CORE_ADDRESS. Update *PC to point at the
2533 breakpoint (if we hit a breakpoint). NOT_A_SW_BREAKPOINT is nonzero
2534 if this is known to not be a real breakpoint (it could still be a
2535 watchpoint, though). */
2537 /* Determine whether we stopped at a breakpoint, etc, or whether we
2538 don't understand this stop. Result is a chain of bpstat's such that:
2540 if we don't understand the stop, the result is a null pointer.
2542 if we understand why we stopped, the result is not null.
2544 Each element of the chain refers to a particular breakpoint or
2545 watchpoint at which we have stopped. (We may have stopped for
2546 several reasons concurrently.)
2548 Each element of the chain has valid next, breakpoint_at,
2549 commands, FIXME??? fields. */
2552 bpstat_stop_status (CORE_ADDR
*pc
, int not_a_sw_breakpoint
)
2554 struct breakpoint
*b
, *temp
;
2556 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2557 int real_breakpoint
= 0;
2558 /* Root of the chain of bpstat's */
2559 struct bpstats root_bs
[1];
2560 /* Pointer to the last thing in the chain currently. */
2561 bpstat bs
= root_bs
;
2563 /* Get the address where the breakpoint would have been. The
2564 "not_a_sw_breakpoint" argument is meant to distinguish between a
2565 breakpoint trap event and a trace/singlestep trap event. For a
2566 trace/singlestep trap event, we would not want to subtract
2567 DECR_PC_AFTER_BREAK from the PC. */
2569 bp_addr
= *pc
- (not_a_sw_breakpoint
? 0 : DECR_PC_AFTER_BREAK
);
2571 ALL_BREAKPOINTS_SAFE (b
, temp
)
2573 if (b
->enable_state
== bp_disabled
2574 || b
->enable_state
== bp_shlib_disabled
2575 || b
->enable_state
== bp_call_disabled
)
2578 if (b
->type
!= bp_watchpoint
2579 && b
->type
!= bp_hardware_watchpoint
2580 && b
->type
!= bp_read_watchpoint
2581 && b
->type
!= bp_access_watchpoint
2582 && b
->type
!= bp_hardware_breakpoint
2583 && b
->type
!= bp_catch_fork
2584 && b
->type
!= bp_catch_vfork
2585 && b
->type
!= bp_catch_exec
2586 && b
->type
!= bp_catch_catch
2587 && b
->type
!= bp_catch_throw
) /* a non-watchpoint bp */
2589 if (b
->loc
->address
!= bp_addr
) /* address doesn't match */
2591 if (overlay_debugging
/* unmapped overlay section */
2592 && section_is_overlay (b
->loc
->section
)
2593 && !section_is_mapped (b
->loc
->section
))
2597 if (b
->type
== bp_hardware_breakpoint
)
2599 if (b
->loc
->address
!= (*pc
- DECR_PC_AFTER_HW_BREAK
))
2601 if (overlay_debugging
/* unmapped overlay section */
2602 && section_is_overlay (b
->loc
->section
)
2603 && !section_is_mapped (b
->loc
->section
))
2607 /* Is this a catchpoint of a load or unload? If so, did we
2608 get a load or unload of the specified library? If not,
2610 if ((b
->type
== bp_catch_load
)
2611 #if defined(SOLIB_HAVE_LOAD_EVENT)
2612 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2613 || ((b
->dll_pathname
!= NULL
)
2614 && (strcmp (b
->dll_pathname
,
2615 SOLIB_LOADED_LIBRARY_PATHNAME (
2616 PIDGET (inferior_ptid
)))
2622 if ((b
->type
== bp_catch_unload
)
2623 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2624 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2625 || ((b
->dll_pathname
!= NULL
)
2626 && (strcmp (b
->dll_pathname
,
2627 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2628 PIDGET (inferior_ptid
)))
2634 if ((b
->type
== bp_catch_fork
)
2635 && !inferior_has_forked (PIDGET (inferior_ptid
),
2636 &b
->forked_inferior_pid
))
2639 if ((b
->type
== bp_catch_vfork
)
2640 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2641 &b
->forked_inferior_pid
))
2644 if ((b
->type
== bp_catch_exec
)
2645 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2648 if (ep_is_exception_catchpoint (b
) &&
2649 !(current_exception_event
= target_get_current_exception_event ()))
2652 /* Come here if it's a watchpoint, or if the break address matches */
2654 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
2656 /* Watchpoints may change this, if not found to have triggered. */
2660 if (b
->type
== bp_watchpoint
||
2661 b
->type
== bp_hardware_watchpoint
)
2663 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2665 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2666 int e
= catch_errors (watchpoint_check
, bs
, message
,
2668 do_cleanups (cleanups
);
2672 /* We've already printed what needs to be printed. */
2673 /* Actually this is superfluous, because by the time we
2674 call print_it_typical() the wp will be already deleted,
2675 and the function will return immediately. */
2676 bs
->print_it
= print_it_done
;
2679 case WP_VALUE_CHANGED
:
2683 case WP_VALUE_NOT_CHANGED
:
2685 bs
->print_it
= print_it_noop
;
2692 /* Error from catch_errors. */
2693 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2694 if (b
->related_breakpoint
)
2695 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2696 b
->disposition
= disp_del_at_next_stop
;
2697 /* We've already printed what needs to be printed. */
2698 bs
->print_it
= print_it_done
;
2704 else if (b
->type
== bp_read_watchpoint
||
2705 b
->type
== bp_access_watchpoint
)
2711 addr
= target_stopped_data_address ();
2714 for (v
= b
->val_chain
; v
; v
= v
->next
)
2716 if (VALUE_LVAL (v
) == lval_memory
2717 && ! VALUE_LAZY (v
))
2719 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
2721 if (v
== b
->val_chain
2722 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
2723 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
2727 vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
2728 /* Exact match not required. Within range is
2730 if (addr
>= vaddr
&&
2731 addr
< vaddr
+ TYPE_LENGTH (VALUE_TYPE (v
)))
2738 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2740 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2741 int e
= catch_errors (watchpoint_check
, bs
, message
,
2743 do_cleanups (cleanups
);
2747 /* We've already printed what needs to be printed. */
2748 bs
->print_it
= print_it_done
;
2751 case WP_VALUE_CHANGED
:
2752 if (b
->type
== bp_read_watchpoint
)
2754 /* Don't stop: read watchpoints shouldn't fire if
2755 the value has changed. This is for targets
2756 which cannot set read-only watchpoints. */
2757 bs
->print_it
= print_it_noop
;
2763 case WP_VALUE_NOT_CHANGED
:
2770 /* Error from catch_errors. */
2771 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2772 if (b
->related_breakpoint
)
2773 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2774 b
->disposition
= disp_del_at_next_stop
;
2775 /* We've already printed what needs to be printed. */
2776 bs
->print_it
= print_it_done
;
2780 else /* found == 0 */
2782 /* This is a case where some watchpoint(s) triggered,
2783 but not at the address of this watchpoint (FOUND
2784 was left zero). So don't print anything for this
2786 bs
->print_it
= print_it_noop
;
2793 /* By definition, an encountered breakpoint is a triggered
2797 real_breakpoint
= 1;
2800 if (frame_id_p (b
->frame_id
)
2801 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2805 int value_is_zero
= 0;
2809 /* Need to select the frame, with all that implies
2810 so that the conditions will have the right context. */
2811 select_frame (get_current_frame ());
2813 = catch_errors (breakpoint_cond_eval
, (b
->cond
),
2814 "Error in testing breakpoint condition:\n",
2816 /* FIXME-someday, should give breakpoint # */
2819 if (b
->cond
&& value_is_zero
)
2822 /* Don't consider this a hit. */
2825 else if (b
->ignore_count
> 0)
2828 annotate_ignore_count_change ();
2833 /* We will stop here */
2834 if (b
->disposition
== disp_disable
)
2835 b
->enable_state
= bp_disabled
;
2838 bs
->commands
= b
->commands
;
2840 (STREQ ("silent", bs
->commands
->line
) ||
2841 (xdb_commands
&& STREQ ("Q", bs
->commands
->line
))))
2843 bs
->commands
= bs
->commands
->next
;
2846 bs
->commands
= copy_command_lines (bs
->commands
);
2849 /* Print nothing for this entry if we dont stop or if we dont print. */
2850 if (bs
->stop
== 0 || bs
->print
== 0)
2851 bs
->print_it
= print_it_noop
;
2854 bs
->next
= NULL
; /* Terminate the chain */
2855 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2857 if (real_breakpoint
&& bs
)
2859 if (bs
->breakpoint_at
->type
== bp_hardware_breakpoint
)
2861 if (DECR_PC_AFTER_HW_BREAK
!= 0)
2863 *pc
= *pc
- DECR_PC_AFTER_HW_BREAK
;
2869 if (DECR_PC_AFTER_BREAK
!= 0 || must_shift_inst_regs
)
2872 #if defined (SHIFT_INST_REGS)
2874 #else /* No SHIFT_INST_REGS. */
2876 #endif /* No SHIFT_INST_REGS. */
2881 /* The value of a hardware watchpoint hasn't changed, but the
2882 intermediate memory locations we are watching may have. */
2883 if (bs
&& !bs
->stop
&&
2884 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2885 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2886 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2888 remove_breakpoints ();
2889 insert_breakpoints ();
2894 /* Tell what to do about this bpstat. */
2896 bpstat_what (bpstat bs
)
2898 /* Classify each bpstat as one of the following. */
2901 /* This bpstat element has no effect on the main_action. */
2904 /* There was a watchpoint, stop but don't print. */
2907 /* There was a watchpoint, stop and print. */
2910 /* There was a breakpoint but we're not stopping. */
2913 /* There was a breakpoint, stop but don't print. */
2916 /* There was a breakpoint, stop and print. */
2919 /* We hit the longjmp breakpoint. */
2922 /* We hit the longjmp_resume breakpoint. */
2925 /* We hit the step_resume breakpoint. */
2928 /* We hit the through_sigtramp breakpoint. */
2931 /* We hit the shared library event breakpoint. */
2934 /* We caught a shared library event. */
2937 /* This is just used to count how many enums there are. */
2941 /* Here is the table which drives this routine. So that we can
2942 format it pretty, we define some abbreviations for the
2943 enum bpstat_what codes. */
2944 #define kc BPSTAT_WHAT_KEEP_CHECKING
2945 #define ss BPSTAT_WHAT_STOP_SILENT
2946 #define sn BPSTAT_WHAT_STOP_NOISY
2947 #define sgl BPSTAT_WHAT_SINGLE
2948 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2949 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2950 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2951 #define sr BPSTAT_WHAT_STEP_RESUME
2952 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2953 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2954 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2956 /* "Can't happen." Might want to print an error message.
2957 abort() is not out of the question, but chances are GDB is just
2958 a bit confused, not unusable. */
2959 #define err BPSTAT_WHAT_STOP_NOISY
2961 /* Given an old action and a class, come up with a new action. */
2962 /* One interesting property of this table is that wp_silent is the same
2963 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2964 after stopping, the check for whether to step over a breakpoint
2965 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2966 reference to how we stopped. We retain separate wp_silent and
2967 bp_silent codes in case we want to change that someday.
2969 Another possibly interesting property of this table is that
2970 there's a partial ordering, priority-like, of the actions. Once
2971 you've decided that some action is appropriate, you'll never go
2972 back and decide something of a lower priority is better. The
2975 kc < clr sgl shl shlr slr sn sr ss ts
2976 sgl < clrs shl shlr slr sn sr ss ts
2977 slr < err shl shlr sn sr ss ts
2978 clr < clrs err shl shlr sn sr ss ts
2979 clrs < err shl shlr sn sr ss ts
2980 ss < shl shlr sn sr ts
2987 What I think this means is that we don't need a damned table
2988 here. If you just put the rows and columns in the right order,
2989 it'd look awfully regular. We could simply walk the bpstat list
2990 and choose the highest priority action we find, with a little
2991 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
2992 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
2993 is messy anyway). */
2995 /* step_resume entries: a step resume breakpoint overrides another
2996 breakpoint of signal handling (see comment in wait_for_inferior
2997 at first PC_IN_SIGTRAMP where we set the step_resume breakpoint). */
2998 /* We handle the through_sigtramp_breakpoint the same way; having both
2999 one of those and a step_resume_breakpoint is probably very rare (?). */
3001 static const enum bpstat_what_main_action
3002 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3005 /* kc ss sn sgl slr clr clrs sr ts shl shlr
3008 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, ts
, shl
, shlr
},
3010 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3012 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3014 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, ts
, shl
, shlr
},
3016 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3018 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3020 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, ts
, shl
, shlr
},
3022 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, ts
, shl
, shlr
},
3024 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, ts
, shl
, shlr
},
3026 {ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, shl
, shlr
},
3028 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, shl
, ts
, shl
, shlr
},
3030 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, ts
, shlr
, shlr
}
3045 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3046 struct bpstat_what retval
;
3048 retval
.call_dummy
= 0;
3049 for (; bs
!= NULL
; bs
= bs
->next
)
3051 enum class bs_class
= no_effect
;
3052 if (bs
->breakpoint_at
== NULL
)
3053 /* I suspect this can happen if it was a momentary breakpoint
3054 which has since been deleted. */
3056 switch (bs
->breakpoint_at
->type
)
3062 case bp_hardware_breakpoint
:
3068 bs_class
= bp_noisy
;
3070 bs_class
= bp_silent
;
3073 bs_class
= bp_nostop
;
3076 case bp_hardware_watchpoint
:
3077 case bp_read_watchpoint
:
3078 case bp_access_watchpoint
:
3082 bs_class
= wp_noisy
;
3084 bs_class
= wp_silent
;
3087 /* There was a watchpoint, but we're not stopping.
3088 This requires no further action. */
3089 bs_class
= no_effect
;
3092 bs_class
= long_jump
;
3094 case bp_longjmp_resume
:
3095 bs_class
= long_resume
;
3097 case bp_step_resume
:
3100 bs_class
= step_resume
;
3103 /* It is for the wrong frame. */
3104 bs_class
= bp_nostop
;
3106 case bp_through_sigtramp
:
3107 bs_class
= through_sig
;
3109 case bp_watchpoint_scope
:
3110 bs_class
= bp_nostop
;
3112 case bp_shlib_event
:
3113 bs_class
= shlib_event
;
3115 case bp_thread_event
:
3116 case bp_overlay_event
:
3117 bs_class
= bp_nostop
;
3120 case bp_catch_unload
:
3121 /* Only if this catchpoint triggered should we cause the
3122 step-out-of-dld behaviour. Otherwise, we ignore this
3125 bs_class
= catch_shlib_event
;
3127 bs_class
= no_effect
;
3130 case bp_catch_vfork
:
3135 bs_class
= bp_noisy
;
3137 bs_class
= bp_silent
;
3140 /* There was a catchpoint, but we're not stopping.
3141 This requires no further action. */
3142 bs_class
= no_effect
;
3144 case bp_catch_catch
:
3145 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
3146 bs_class
= bp_nostop
;
3148 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3150 case bp_catch_throw
:
3151 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
3152 bs_class
= bp_nostop
;
3154 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3157 /* Make sure the action is stop (silent or noisy),
3158 so infrun.c pops the dummy frame. */
3159 bs_class
= bp_silent
;
3160 retval
.call_dummy
= 1;
3163 current_action
= table
[(int) bs_class
][(int) current_action
];
3165 retval
.main_action
= current_action
;
3169 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3170 without hardware support). This isn't related to a specific bpstat,
3171 just to things like whether watchpoints are set. */
3174 bpstat_should_step (void)
3176 struct breakpoint
*b
;
3178 if (b
->enable_state
== bp_enabled
&& b
->type
== bp_watchpoint
)
3183 /* Nonzero if there are enabled hardware watchpoints. */
3185 bpstat_have_active_hw_watchpoints (void)
3187 struct bp_location
*bpt
;
3188 ALL_BP_LOCATIONS (bpt
)
3189 if ((bpt
->owner
->enable_state
== bp_enabled
)
3191 && bpt
->loc_type
== bp_loc_hardware_watchpoint
)
3197 /* Given a bpstat that records zero or more triggered eventpoints, this
3198 function returns another bpstat which contains only the catchpoints
3199 on that first list, if any. */
3201 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3203 struct bpstats root_bs
[1];
3204 bpstat bs
= root_bs
;
3205 struct breakpoint
*ep
;
3208 bpstat_clear (cp_list
);
3209 root_bs
->next
= NULL
;
3211 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3213 /* Is this eventpoint a catchpoint? If not, ignore it. */
3214 ep
= ep_list
->breakpoint_at
;
3217 if ((ep
->type
!= bp_catch_load
) &&
3218 (ep
->type
!= bp_catch_unload
) &&
3219 (ep
->type
!= bp_catch_catch
) &&
3220 (ep
->type
!= bp_catch_throw
))
3221 /* pai: (temp) ADD fork/vfork here!! */
3224 /* Yes; add it to the list. */
3225 bs
= bpstat_alloc (ep
, bs
);
3230 #if defined(SOLIB_ADD)
3231 /* Also, for each triggered catchpoint, tag it with the name of
3232 the library that caused this trigger. (We copy the name now,
3233 because it's only guaranteed to be available NOW, when the
3234 catchpoint triggers. Clients who may wish to know the name
3235 later must get it from the catchpoint itself.) */
3236 if (ep
->triggered_dll_pathname
!= NULL
)
3237 xfree (ep
->triggered_dll_pathname
);
3238 if (ep
->type
== bp_catch_load
)
3239 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3240 PIDGET (inferior_ptid
));
3242 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3243 PIDGET (inferior_ptid
));
3245 dll_pathname
= NULL
;
3249 ep
->triggered_dll_pathname
= (char *)
3250 xmalloc (strlen (dll_pathname
) + 1);
3251 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3254 ep
->triggered_dll_pathname
= NULL
;
3260 /* Print B to gdb_stdout. */
3262 print_one_breakpoint (struct breakpoint
*b
,
3263 CORE_ADDR
*last_addr
)
3265 struct command_line
*l
;
3267 struct ep_type_description
3272 static struct ep_type_description bptypes
[] =
3274 {bp_none
, "?deleted?"},
3275 {bp_breakpoint
, "breakpoint"},
3276 {bp_hardware_breakpoint
, "hw breakpoint"},
3277 {bp_until
, "until"},
3278 {bp_finish
, "finish"},
3279 {bp_watchpoint
, "watchpoint"},
3280 {bp_hardware_watchpoint
, "hw watchpoint"},
3281 {bp_read_watchpoint
, "read watchpoint"},
3282 {bp_access_watchpoint
, "acc watchpoint"},
3283 {bp_longjmp
, "longjmp"},
3284 {bp_longjmp_resume
, "longjmp resume"},
3285 {bp_step_resume
, "step resume"},
3286 {bp_through_sigtramp
, "sigtramp"},
3287 {bp_watchpoint_scope
, "watchpoint scope"},
3288 {bp_call_dummy
, "call dummy"},
3289 {bp_shlib_event
, "shlib events"},
3290 {bp_thread_event
, "thread events"},
3291 {bp_overlay_event
, "overlay events"},
3292 {bp_catch_load
, "catch load"},
3293 {bp_catch_unload
, "catch unload"},
3294 {bp_catch_fork
, "catch fork"},
3295 {bp_catch_vfork
, "catch vfork"},
3296 {bp_catch_exec
, "catch exec"},
3297 {bp_catch_catch
, "catch catch"},
3298 {bp_catch_throw
, "catch throw"}
3301 static char *bpdisps
[] =
3302 {"del", "dstp", "dis", "keep"};
3303 static char bpenables
[] = "nynny";
3304 char wrap_indent
[80];
3305 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3306 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3307 struct cleanup
*bkpt_chain
;
3310 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3314 ui_out_field_int (uiout
, "number", b
->number
);
3318 if (((int) b
->type
> (sizeof (bptypes
) / sizeof (bptypes
[0])))
3319 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3320 internal_error (__FILE__
, __LINE__
,
3321 "bptypes table does not describe type #%d.",
3323 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3327 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3331 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3332 ui_out_spaces (uiout
, 2);
3335 strcpy (wrap_indent
, " ");
3338 if (TARGET_ADDR_BIT
<= 32)
3339 strcat (wrap_indent
, " ");
3341 strcat (wrap_indent
, " ");
3344 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3345 b
->ops
->print_one (b
, last_addr
);
3350 internal_error (__FILE__
, __LINE__
,
3351 "print_one_breakpoint: bp_none encountered\n");
3355 case bp_hardware_watchpoint
:
3356 case bp_read_watchpoint
:
3357 case bp_access_watchpoint
:
3358 /* Field 4, the address, is omitted (which makes the columns
3359 not line up too nicely with the headers, but the effect
3360 is relatively readable). */
3362 ui_out_field_skip (uiout
, "addr");
3364 print_expression (b
->exp
, stb
->stream
);
3365 ui_out_field_stream (uiout
, "what", stb
);
3369 case bp_catch_unload
:
3370 /* Field 4, the address, is omitted (which makes the columns
3371 not line up too nicely with the headers, but the effect
3372 is relatively readable). */
3374 ui_out_field_skip (uiout
, "addr");
3376 if (b
->dll_pathname
== NULL
)
3378 ui_out_field_string (uiout
, "what", "<any library>");
3379 ui_out_spaces (uiout
, 1);
3383 ui_out_text (uiout
, "library \"");
3384 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3385 ui_out_text (uiout
, "\" ");
3390 case bp_catch_vfork
:
3391 /* Field 4, the address, is omitted (which makes the columns
3392 not line up too nicely with the headers, but the effect
3393 is relatively readable). */
3395 ui_out_field_skip (uiout
, "addr");
3397 if (b
->forked_inferior_pid
!= 0)
3399 ui_out_text (uiout
, "process ");
3400 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3401 ui_out_spaces (uiout
, 1);
3405 /* Field 4, the address, is omitted (which makes the columns
3406 not line up too nicely with the headers, but the effect
3407 is relatively readable). */
3409 ui_out_field_skip (uiout
, "addr");
3411 if (b
->exec_pathname
!= NULL
)
3413 ui_out_text (uiout
, "program \"");
3414 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3415 ui_out_text (uiout
, "\" ");
3419 case bp_catch_catch
:
3420 /* Field 4, the address, is omitted (which makes the columns
3421 not line up too nicely with the headers, but the effect
3422 is relatively readable). */
3424 ui_out_field_skip (uiout
, "addr");
3426 ui_out_field_string (uiout
, "what", "exception catch");
3427 ui_out_spaces (uiout
, 1);
3430 case bp_catch_throw
:
3431 /* Field 4, the address, is omitted (which makes the columns
3432 not line up too nicely with the headers, but the effect
3433 is relatively readable). */
3435 ui_out_field_skip (uiout
, "addr");
3437 ui_out_field_string (uiout
, "what", "exception throw");
3438 ui_out_spaces (uiout
, 1);
3442 case bp_hardware_breakpoint
:
3446 case bp_longjmp_resume
:
3447 case bp_step_resume
:
3448 case bp_through_sigtramp
:
3449 case bp_watchpoint_scope
:
3451 case bp_shlib_event
:
3452 case bp_thread_event
:
3453 case bp_overlay_event
:
3457 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
3460 *last_addr
= b
->loc
->address
;
3463 sym
= find_pc_sect_function (b
->loc
->address
, b
->loc
->section
);
3466 ui_out_text (uiout
, "in ");
3467 ui_out_field_string (uiout
, "func",
3468 SYMBOL_PRINT_NAME (sym
));
3469 ui_out_wrap_hint (uiout
, wrap_indent
);
3470 ui_out_text (uiout
, " at ");
3472 ui_out_field_string (uiout
, "file", b
->source_file
);
3473 ui_out_text (uiout
, ":");
3474 ui_out_field_int (uiout
, "line", b
->line_number
);
3478 print_address_symbolic (b
->loc
->address
, stb
->stream
, demangle
, "");
3479 ui_out_field_stream (uiout
, "at", stb
);
3484 if (b
->thread
!= -1)
3486 /* FIXME: This seems to be redundant and lost here; see the
3487 "stop only in" line a little further down. */
3488 ui_out_text (uiout
, " thread ");
3489 ui_out_field_int (uiout
, "thread", b
->thread
);
3492 ui_out_text (uiout
, "\n");
3494 if (frame_id_p (b
->frame_id
))
3497 ui_out_text (uiout
, "\tstop only in stack frame at ");
3498 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3500 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3501 ui_out_text (uiout
, "\n");
3507 ui_out_text (uiout
, "\tstop only if ");
3508 print_expression (b
->cond
, stb
->stream
);
3509 ui_out_field_stream (uiout
, "cond", stb
);
3510 ui_out_text (uiout
, "\n");
3513 if (b
->thread
!= -1)
3515 /* FIXME should make an annotation for this */
3516 ui_out_text (uiout
, "\tstop only in thread ");
3517 ui_out_field_int (uiout
, "thread", b
->thread
);
3518 ui_out_text (uiout
, "\n");
3521 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3523 /* FIXME should make an annotation for this */
3524 if (ep_is_catchpoint (b
))
3525 ui_out_text (uiout
, "\tcatchpoint");
3527 ui_out_text (uiout
, "\tbreakpoint");
3528 ui_out_text (uiout
, " already hit ");
3529 ui_out_field_int (uiout
, "times", b
->hit_count
);
3530 if (b
->hit_count
== 1)
3531 ui_out_text (uiout
, " time\n");
3533 ui_out_text (uiout
, " times\n");
3536 /* Output the count also if it is zero, but only if this is
3537 mi. FIXME: Should have a better test for this. */
3538 if (ui_out_is_mi_like_p (uiout
))
3539 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3540 ui_out_field_int (uiout
, "times", b
->hit_count
);
3542 if (b
->ignore_count
)
3545 ui_out_text (uiout
, "\tignore next ");
3546 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3547 ui_out_text (uiout
, " hits\n");
3550 if ((l
= b
->commands
))
3552 struct cleanup
*script_chain
;
3555 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3556 print_command_lines (uiout
, l
, 4);
3557 do_cleanups (script_chain
);
3559 do_cleanups (bkpt_chain
);
3560 do_cleanups (old_chain
);
3563 struct captured_breakpoint_query_args
3569 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3571 struct captured_breakpoint_query_args
*args
= data
;
3572 struct breakpoint
*b
;
3573 CORE_ADDR dummy_addr
= 0;
3576 if (args
->bnum
== b
->number
)
3578 print_one_breakpoint (b
, &dummy_addr
);
3586 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
)
3588 struct captured_breakpoint_query_args args
;
3590 /* For the moment we don't trust print_one_breakpoint() to not throw
3592 return catch_exceptions (uiout
, do_captured_breakpoint_query
, &args
,
3593 NULL
, RETURN_MASK_ALL
);
3596 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3597 catchpoints, et.al.). */
3600 user_settable_breakpoint (const struct breakpoint
*b
)
3602 return (b
->type
== bp_breakpoint
3603 || b
->type
== bp_catch_load
3604 || b
->type
== bp_catch_unload
3605 || b
->type
== bp_catch_fork
3606 || b
->type
== bp_catch_vfork
3607 || b
->type
== bp_catch_exec
3608 || b
->type
== bp_catch_catch
3609 || b
->type
== bp_catch_throw
3610 || b
->type
== bp_hardware_breakpoint
3611 || b
->type
== bp_watchpoint
3612 || b
->type
== bp_read_watchpoint
3613 || b
->type
== bp_access_watchpoint
3614 || b
->type
== bp_hardware_watchpoint
);
3617 /* Print information on user settable breakpoint (watchpoint, etc)
3618 number BNUM. If BNUM is -1 print all user settable breakpoints.
3619 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3622 breakpoint_1 (int bnum
, int allflag
)
3624 struct breakpoint
*b
;
3625 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3626 int nr_printable_breakpoints
;
3627 struct cleanup
*bkpttbl_chain
;
3629 /* Compute the number of rows in the table. */
3630 nr_printable_breakpoints
= 0;
3633 || bnum
== b
->number
)
3635 if (allflag
|| user_settable_breakpoint (b
))
3636 nr_printable_breakpoints
++;
3641 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3645 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3648 if (nr_printable_breakpoints
> 0)
3649 annotate_breakpoints_headers ();
3650 if (nr_printable_breakpoints
> 0)
3652 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3653 if (nr_printable_breakpoints
> 0)
3655 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3656 if (nr_printable_breakpoints
> 0)
3658 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3659 if (nr_printable_breakpoints
> 0)
3661 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3664 if (nr_printable_breakpoints
> 0)
3666 if (TARGET_ADDR_BIT
<= 32)
3667 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3669 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3671 if (nr_printable_breakpoints
> 0)
3673 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3674 ui_out_table_body (uiout
);
3675 if (nr_printable_breakpoints
> 0)
3676 annotate_breakpoints_table ();
3680 || bnum
== b
->number
)
3682 /* We only print out user settable breakpoints unless the
3684 if (allflag
|| user_settable_breakpoint (b
))
3685 print_one_breakpoint (b
, &last_addr
);
3688 do_cleanups (bkpttbl_chain
);
3690 if (nr_printable_breakpoints
== 0)
3693 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3695 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3700 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3701 that a comparison of an unsigned with -1 is always false. */
3702 if (last_addr
!= (CORE_ADDR
) -1)
3703 set_next_address (last_addr
);
3706 /* FIXME? Should this be moved up so that it is only called when
3707 there have been breakpoints? */
3708 annotate_breakpoints_table_end ();
3712 breakpoints_info (char *bnum_exp
, int from_tty
)
3717 bnum
= parse_and_eval_long (bnum_exp
);
3719 breakpoint_1 (bnum
, 0);
3723 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3728 bnum
= parse_and_eval_long (bnum_exp
);
3730 breakpoint_1 (bnum
, 1);
3733 /* Print a message describing any breakpoints set at PC. */
3736 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
)
3739 struct breakpoint
*b
;
3742 if (b
->loc
->address
== pc
) /* address match / overlay match */
3743 if (!overlay_debugging
|| b
->loc
->section
== section
)
3747 printf_filtered ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
3749 if (b
->loc
->address
== pc
) /* address match / overlay match */
3750 if (!overlay_debugging
|| b
->loc
->section
== section
)
3753 printf_filtered ("%d%s%s ",
3755 ((b
->enable_state
== bp_disabled
||
3756 b
->enable_state
== bp_shlib_disabled
||
3757 b
->enable_state
== bp_call_disabled
)
3759 : b
->enable_state
== bp_permanent
3763 : ((others
== 1) ? " and" : ""));
3765 printf_filtered ("also set at pc ");
3766 print_address_numeric (pc
, 1, gdb_stdout
);
3767 printf_filtered (".\n");
3771 /* Set the default place to put a breakpoint
3772 for the `break' command with no arguments. */
3775 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3778 default_breakpoint_valid
= valid
;
3779 default_breakpoint_address
= addr
;
3780 default_breakpoint_symtab
= symtab
;
3781 default_breakpoint_line
= line
;
3784 /* Return true iff it is meaningful to use the address member of
3785 BPT. For some breakpoint types, the address member is irrelevant
3786 and it makes no sense to attempt to compare it to other addresses
3787 (or use it for any other purpose either).
3789 More specifically, each of the following breakpoint types will always
3790 have a zero valued address and we don't want check_duplicates() to mark
3791 breakpoints of any of these types to be a duplicate of an actual
3792 breakpoint at address zero:
3795 bp_hardware_watchpoint
3797 bp_access_watchpoint
3804 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3806 enum bptype type
= bpt
->type
;
3808 return (type
!= bp_watchpoint
3809 && type
!= bp_hardware_watchpoint
3810 && type
!= bp_read_watchpoint
3811 && type
!= bp_access_watchpoint
3812 && type
!= bp_catch_exec
3813 && type
!= bp_longjmp_resume
3814 && type
!= bp_catch_fork
3815 && type
!= bp_catch_vfork
);
3818 /* Rescan breakpoints at the same address and section as BPT,
3819 marking the first one as "first" and any others as "duplicates".
3820 This is so that the bpt instruction is only inserted once.
3821 If we have a permanent breakpoint at the same place as BPT, make
3822 that one the official one, and the rest as duplicates. */
3825 check_duplicates (struct breakpoint
*bpt
)
3827 struct bp_location
*b
;
3829 struct bp_location
*perm_bp
= 0;
3830 CORE_ADDR address
= bpt
->loc
->address
;
3831 asection
*section
= bpt
->loc
->section
;
3833 if (! breakpoint_address_is_meaningful (bpt
))
3836 ALL_BP_LOCATIONS (b
)
3837 if (b
->owner
->enable_state
!= bp_disabled
3838 && b
->owner
->enable_state
!= bp_shlib_disabled
3839 && b
->owner
->enable_state
!= bp_call_disabled
3840 && b
->address
== address
/* address / overlay match */
3841 && (!overlay_debugging
|| b
->section
== section
)
3842 && breakpoint_address_is_meaningful (b
->owner
))
3844 /* Have we found a permanent breakpoint? */
3845 if (b
->owner
->enable_state
== bp_permanent
)
3852 b
->duplicate
= count
> 1;
3855 /* If we found a permanent breakpoint at this address, go over the
3856 list again and declare all the other breakpoints there to be the
3860 perm_bp
->duplicate
= 0;
3862 /* Permanent breakpoint should always be inserted. */
3863 if (! perm_bp
->inserted
)
3864 internal_error (__FILE__
, __LINE__
,
3865 "allegedly permanent breakpoint is not "
3866 "actually inserted");
3868 ALL_BP_LOCATIONS (b
)
3871 if (b
->owner
->enable_state
!= bp_disabled
3872 && b
->owner
->enable_state
!= bp_shlib_disabled
3873 && b
->owner
->enable_state
!= bp_call_disabled
3874 && b
->address
== address
/* address / overlay match */
3875 && (!overlay_debugging
|| b
->section
== section
)
3876 && breakpoint_address_is_meaningful (b
->owner
))
3879 internal_error (__FILE__
, __LINE__
,
3880 "another breakpoint was inserted on top of "
3881 "a permanent breakpoint");
3890 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
3891 int bnum
, int have_bnum
)
3896 strcpy (astr1
, local_hex_string_custom ((unsigned long) from_addr
, "08l"));
3897 strcpy (astr2
, local_hex_string_custom ((unsigned long) to_addr
, "08l"));
3899 warning ("Breakpoint %d address previously adjusted from %s to %s.",
3900 bnum
, astr1
, astr2
);
3902 warning ("Breakpoint address adjusted from %s to %s.", astr1
, astr2
);
3905 /* Adjust a breakpoint's address to account for architectural constraints
3906 on breakpoint placement. Return the adjusted address. Note: Very
3907 few targets require this kind of adjustment. For most targets,
3908 this function is simply the identity function. */
3911 adjust_breakpoint_address (CORE_ADDR bpaddr
)
3913 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
3915 /* Very few targets need any kind of breakpoint adjustment. */
3920 CORE_ADDR adjusted_bpaddr
;
3922 /* Some targets have architectural constraints on the placement
3923 of breakpoint instructions. Obtain the adjusted address. */
3924 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
3927 /* An adjusted breakpoint address can significantly alter
3928 a user's expectations. Print a warning if an adjustment
3930 if (adjusted_bpaddr
!= bpaddr
)
3931 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
3933 return adjusted_bpaddr
;
3937 /* Allocate a struct bp_location. */
3939 static struct bp_location
*
3940 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
)
3942 struct bp_location
*loc
, *loc_p
;
3944 loc
= xmalloc (sizeof (struct bp_location
));
3945 memset (loc
, 0, sizeof (*loc
));
3955 case bp_longjmp_resume
:
3956 case bp_step_resume
:
3957 case bp_through_sigtramp
:
3958 case bp_watchpoint_scope
:
3960 case bp_shlib_event
:
3961 case bp_thread_event
:
3962 case bp_overlay_event
:
3964 case bp_catch_unload
:
3965 loc
->loc_type
= bp_loc_software_breakpoint
;
3967 case bp_hardware_breakpoint
:
3968 loc
->loc_type
= bp_loc_hardware_breakpoint
;
3970 case bp_hardware_watchpoint
:
3971 case bp_read_watchpoint
:
3972 case bp_access_watchpoint
:
3973 loc
->loc_type
= bp_loc_hardware_watchpoint
;
3977 case bp_catch_vfork
:
3979 case bp_catch_catch
:
3980 case bp_catch_throw
:
3981 loc
->loc_type
= bp_loc_other
;
3984 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
3987 /* Add this breakpoint to the end of the chain. */
3989 loc_p
= bp_location_chain
;
3991 bp_location_chain
= loc
;
3995 loc_p
= loc_p
->next
;
4002 /* set_raw_breakpoint() is a low level routine for allocating and
4003 partially initializing a breakpoint of type BPTYPE. The newly
4004 created breakpoint's address, section, source file name, and line
4005 number are provided by SAL. The newly created and partially
4006 initialized breakpoint is added to the breakpoint chain and
4007 is also returned as the value of this function.
4009 It is expected that the caller will complete the initialization of
4010 the newly created breakpoint struct as well as output any status
4011 information regarding the creation of a new breakpoint. In
4012 particular, set_raw_breakpoint() does NOT set the breakpoint
4013 number! Care should be taken to not allow an error() to occur
4014 prior to completing the initialization of the breakpoint. If this
4015 should happen, a bogus breakpoint will be left on the chain. */
4018 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4020 struct breakpoint
*b
, *b1
;
4022 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4023 memset (b
, 0, sizeof (*b
));
4024 b
->loc
= allocate_bp_location (b
, bptype
);
4025 b
->loc
->requested_address
= sal
.pc
;
4026 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
);
4027 if (sal
.symtab
== NULL
)
4028 b
->source_file
= NULL
;
4030 b
->source_file
= savestring (sal
.symtab
->filename
,
4031 strlen (sal
.symtab
->filename
));
4032 b
->loc
->section
= sal
.section
;
4034 b
->language
= current_language
->la_language
;
4035 b
->input_radix
= input_radix
;
4037 b
->line_number
= sal
.line
;
4038 b
->enable_state
= bp_enabled
;
4041 b
->ignore_count
= 0;
4043 b
->frame_id
= null_frame_id
;
4044 b
->dll_pathname
= NULL
;
4045 b
->triggered_dll_pathname
= NULL
;
4046 b
->forked_inferior_pid
= 0;
4047 b
->exec_pathname
= NULL
;
4050 /* Add this breakpoint to the end of the chain
4051 so that a list of breakpoints will come out in order
4052 of increasing numbers. */
4054 b1
= breakpoint_chain
;
4056 breakpoint_chain
= b
;
4064 check_duplicates (b
);
4065 breakpoints_changed ();
4071 /* Note that the breakpoint object B describes a permanent breakpoint
4072 instruction, hard-wired into the inferior's code. */
4074 make_breakpoint_permanent (struct breakpoint
*b
)
4076 b
->enable_state
= bp_permanent
;
4078 /* By definition, permanent breakpoints are already present in the code. */
4079 b
->loc
->inserted
= 1;
4082 static struct breakpoint
*
4083 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4085 static int internal_breakpoint_number
= -1;
4086 struct symtab_and_line sal
;
4087 struct breakpoint
*b
;
4089 init_sal (&sal
); /* initialize to zeroes */
4092 sal
.section
= find_pc_overlay (sal
.pc
);
4094 b
= set_raw_breakpoint (sal
, type
);
4095 b
->number
= internal_breakpoint_number
--;
4096 b
->disposition
= disp_donttouch
;
4103 create_longjmp_breakpoint (char *func_name
)
4105 struct breakpoint
*b
;
4106 struct minimal_symbol
*m
;
4108 if (func_name
== NULL
)
4109 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
4112 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4115 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4118 b
->enable_state
= bp_disabled
;
4121 b
->addr_string
= xstrdup (func_name
);
4124 /* Call this routine when stepping and nexting to enable a breakpoint
4125 if we do a longjmp(). When we hit that breakpoint, call
4126 set_longjmp_resume_breakpoint() to figure out where we are going. */
4129 enable_longjmp_breakpoint (void)
4131 struct breakpoint
*b
;
4134 if (b
->type
== bp_longjmp
)
4136 b
->enable_state
= bp_enabled
;
4137 check_duplicates (b
);
4142 disable_longjmp_breakpoint (void)
4144 struct breakpoint
*b
;
4147 if (b
->type
== bp_longjmp
4148 || b
->type
== bp_longjmp_resume
)
4150 b
->enable_state
= bp_disabled
;
4151 check_duplicates (b
);
4156 create_overlay_event_breakpoint (char *func_name
)
4158 struct breakpoint
*b
;
4159 struct minimal_symbol
*m
;
4161 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4164 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4166 b
->addr_string
= xstrdup (func_name
);
4168 if (overlay_debugging
== ovly_auto
)
4170 b
->enable_state
= bp_enabled
;
4171 overlay_events_enabled
= 1;
4175 b
->enable_state
= bp_disabled
;
4176 overlay_events_enabled
= 0;
4181 enable_overlay_breakpoints (void)
4183 struct breakpoint
*b
;
4186 if (b
->type
== bp_overlay_event
)
4188 b
->enable_state
= bp_enabled
;
4189 check_duplicates (b
);
4190 overlay_events_enabled
= 1;
4195 disable_overlay_breakpoints (void)
4197 struct breakpoint
*b
;
4200 if (b
->type
== bp_overlay_event
)
4202 b
->enable_state
= bp_disabled
;
4203 check_duplicates (b
);
4204 overlay_events_enabled
= 0;
4209 create_thread_event_breakpoint (CORE_ADDR address
)
4211 struct breakpoint
*b
;
4213 b
= create_internal_breakpoint (address
, bp_thread_event
);
4215 b
->enable_state
= bp_enabled
;
4216 /* addr_string has to be used or breakpoint_re_set will delete me. */
4217 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->loc
->address
));
4223 remove_thread_event_breakpoints (void)
4225 struct breakpoint
*b
, *temp
;
4227 ALL_BREAKPOINTS_SAFE (b
, temp
)
4228 if (b
->type
== bp_thread_event
)
4229 delete_breakpoint (b
);
4234 remove_solib_event_breakpoints (void)
4236 struct breakpoint
*b
, *temp
;
4238 ALL_BREAKPOINTS_SAFE (b
, temp
)
4239 if (b
->type
== bp_shlib_event
)
4240 delete_breakpoint (b
);
4244 create_solib_event_breakpoint (CORE_ADDR address
)
4246 struct breakpoint
*b
;
4248 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4252 /* Disable any breakpoints that are on code in shared libraries. Only
4253 apply to enabled breakpoints, disabled ones can just stay disabled. */
4256 disable_breakpoints_in_shlibs (int silent
)
4258 struct breakpoint
*b
;
4259 int disabled_shlib_breaks
= 0;
4261 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4264 #if defined (PC_SOLIB)
4265 if (((b
->type
== bp_breakpoint
) ||
4266 (b
->type
== bp_hardware_breakpoint
)) &&
4267 b
->enable_state
== bp_enabled
&&
4268 !b
->loc
->duplicate
&&
4269 PC_SOLIB (b
->loc
->address
))
4271 b
->enable_state
= bp_shlib_disabled
;
4274 if (!disabled_shlib_breaks
)
4276 target_terminal_ours_for_output ();
4277 warning ("Temporarily disabling shared library breakpoints:");
4279 disabled_shlib_breaks
= 1;
4280 warning ("breakpoint #%d ", b
->number
);
4287 /* Try to reenable any breakpoints in shared libraries. */
4289 re_enable_breakpoints_in_shlibs (void)
4291 struct breakpoint
*b
;
4294 if (b
->enable_state
== bp_shlib_disabled
)
4298 /* Do not reenable the breakpoint if the shared library
4299 is still not mapped in. */
4300 if (target_read_memory (b
->loc
->address
, buf
, 1) == 0)
4301 b
->enable_state
= bp_enabled
;
4308 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
4309 char *cond_string
, enum bptype bp_kind
)
4311 struct breakpoint
*b
;
4312 struct symtabs_and_lines sals
;
4313 struct cleanup
*old_chain
;
4314 struct cleanup
*canonical_strings_chain
= NULL
;
4315 char *addr_start
= hookname
;
4316 char *addr_end
= NULL
;
4317 char **canonical
= (char **) NULL
;
4318 int thread
= -1; /* All threads. */
4320 /* Set a breakpoint on the specified hook. */
4321 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
, 0, &canonical
);
4322 addr_end
= hookname
;
4324 if (sals
.nelts
== 0)
4326 warning ("Unable to set a breakpoint on dynamic linker callback.");
4327 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4328 warning ("GDB will be unable to track shl_load/shl_unload calls");
4331 if (sals
.nelts
!= 1)
4333 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4334 warning ("GDB will be unable to track shl_load/shl_unload calls");
4338 /* Make sure that all storage allocated in decode_line_1 gets freed
4339 in case the following errors out. */
4340 old_chain
= make_cleanup (xfree
, sals
.sals
);
4341 if (canonical
!= (char **) NULL
)
4343 make_cleanup (xfree
, canonical
);
4344 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
4345 if (canonical
[0] != NULL
)
4346 make_cleanup (xfree
, canonical
[0]);
4349 resolve_sal_pc (&sals
.sals
[0]);
4351 /* Remove the canonical strings from the cleanup, they are needed below. */
4352 if (canonical
!= (char **) NULL
)
4353 discard_cleanups (canonical_strings_chain
);
4355 b
= set_raw_breakpoint (sals
.sals
[0], bp_kind
);
4356 set_breakpoint_count (breakpoint_count
+ 1);
4357 b
->number
= breakpoint_count
;
4359 b
->cond_string
= (cond_string
== NULL
) ?
4360 NULL
: savestring (cond_string
, strlen (cond_string
));
4363 if (canonical
!= (char **) NULL
&& canonical
[0] != NULL
)
4364 b
->addr_string
= canonical
[0];
4365 else if (addr_start
)
4366 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
4368 b
->enable_state
= bp_enabled
;
4369 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4371 if (dll_pathname
== NULL
)
4372 b
->dll_pathname
= NULL
;
4375 b
->dll_pathname
= (char *) xmalloc (strlen (dll_pathname
) + 1);
4376 strcpy (b
->dll_pathname
, dll_pathname
);
4380 do_cleanups (old_chain
);
4384 create_solib_load_event_breakpoint (char *hookname
, int tempflag
,
4385 char *dll_pathname
, char *cond_string
)
4387 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4388 cond_string
, bp_catch_load
);
4392 create_solib_unload_event_breakpoint (char *hookname
, int tempflag
,
4393 char *dll_pathname
, char *cond_string
)
4395 solib_load_unload_1 (hookname
,tempflag
, dll_pathname
,
4396 cond_string
, bp_catch_unload
);
4400 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4401 enum bptype bp_kind
)
4403 struct symtab_and_line sal
;
4404 struct breakpoint
*b
;
4405 int thread
= -1; /* All threads. */
4412 b
= set_raw_breakpoint (sal
, bp_kind
);
4413 set_breakpoint_count (breakpoint_count
+ 1);
4414 b
->number
= breakpoint_count
;
4416 b
->cond_string
= (cond_string
== NULL
) ?
4417 NULL
: savestring (cond_string
, strlen (cond_string
));
4419 b
->addr_string
= NULL
;
4420 b
->enable_state
= bp_enabled
;
4421 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4422 b
->forked_inferior_pid
= 0;
4428 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4430 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4434 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4436 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4440 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4442 struct symtab_and_line sal
;
4443 struct breakpoint
*b
;
4444 int thread
= -1; /* All threads. */
4451 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4452 set_breakpoint_count (breakpoint_count
+ 1);
4453 b
->number
= breakpoint_count
;
4455 b
->cond_string
= (cond_string
== NULL
) ?
4456 NULL
: savestring (cond_string
, strlen (cond_string
));
4458 b
->addr_string
= NULL
;
4459 b
->enable_state
= bp_enabled
;
4460 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4466 hw_breakpoint_used_count (void)
4468 struct breakpoint
*b
;
4473 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4481 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4483 struct breakpoint
*b
;
4486 *other_type_used
= 0;
4489 if (b
->enable_state
== bp_enabled
)
4491 if (b
->type
== type
)
4493 else if ((b
->type
== bp_hardware_watchpoint
||
4494 b
->type
== bp_read_watchpoint
||
4495 b
->type
== bp_access_watchpoint
)
4496 && b
->enable_state
== bp_enabled
)
4497 *other_type_used
= 1;
4503 /* Call this after hitting the longjmp() breakpoint. Use this to set
4504 a new breakpoint at the target of the jmp_buf.
4506 FIXME - This ought to be done by setting a temporary breakpoint
4507 that gets deleted automatically... */
4510 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_id frame_id
)
4512 struct breakpoint
*b
;
4515 if (b
->type
== bp_longjmp_resume
)
4517 b
->loc
->requested_address
= pc
;
4518 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
);
4519 b
->enable_state
= bp_enabled
;
4520 b
->frame_id
= frame_id
;
4521 check_duplicates (b
);
4527 disable_watchpoints_before_interactive_call_start (void)
4529 struct breakpoint
*b
;
4533 if (((b
->type
== bp_watchpoint
)
4534 || (b
->type
== bp_hardware_watchpoint
)
4535 || (b
->type
== bp_read_watchpoint
)
4536 || (b
->type
== bp_access_watchpoint
)
4537 || ep_is_exception_catchpoint (b
))
4538 && (b
->enable_state
== bp_enabled
))
4540 b
->enable_state
= bp_call_disabled
;
4541 check_duplicates (b
);
4547 enable_watchpoints_after_interactive_call_stop (void)
4549 struct breakpoint
*b
;
4553 if (((b
->type
== bp_watchpoint
)
4554 || (b
->type
== bp_hardware_watchpoint
)
4555 || (b
->type
== bp_read_watchpoint
)
4556 || (b
->type
== bp_access_watchpoint
)
4557 || ep_is_exception_catchpoint (b
))
4558 && (b
->enable_state
== bp_call_disabled
))
4560 b
->enable_state
= bp_enabled
;
4561 check_duplicates (b
);
4567 /* Set a breakpoint that will evaporate an end of command
4568 at address specified by SAL.
4569 Restrict it to frame FRAME if FRAME is nonzero. */
4572 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4575 struct breakpoint
*b
;
4576 b
= set_raw_breakpoint (sal
, type
);
4577 b
->enable_state
= bp_enabled
;
4578 b
->disposition
= disp_donttouch
;
4579 b
->frame_id
= frame_id
;
4581 /* If we're debugging a multi-threaded program, then we
4582 want momentary breakpoints to be active in only a
4583 single thread of control. */
4584 if (in_thread_list (inferior_ptid
))
4585 b
->thread
= pid_to_thread_id (inferior_ptid
);
4591 /* Tell the user we have just set a breakpoint B. */
4594 mention (struct breakpoint
*b
)
4597 struct cleanup
*old_chain
, *ui_out_chain
;
4598 struct ui_stream
*stb
;
4600 stb
= ui_out_stream_new (uiout
);
4601 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4603 /* FIXME: This is misplaced; mention() is called by things (like hitting a
4604 watchpoint) other than breakpoint creation. It should be possible to
4605 clean this up and at the same time replace the random calls to
4606 breakpoint_changed with this hook, as has already been done for
4607 delete_breakpoint_hook and so on. */
4608 if (create_breakpoint_hook
)
4609 create_breakpoint_hook (b
);
4610 breakpoint_create_event (b
->number
);
4612 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4613 b
->ops
->print_mention (b
);
4618 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b
->number
);
4621 ui_out_text (uiout
, "Watchpoint ");
4622 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4623 ui_out_field_int (uiout
, "number", b
->number
);
4624 ui_out_text (uiout
, ": ");
4625 print_expression (b
->exp
, stb
->stream
);
4626 ui_out_field_stream (uiout
, "exp", stb
);
4627 do_cleanups (ui_out_chain
);
4629 case bp_hardware_watchpoint
:
4630 ui_out_text (uiout
, "Hardware watchpoint ");
4631 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4632 ui_out_field_int (uiout
, "number", b
->number
);
4633 ui_out_text (uiout
, ": ");
4634 print_expression (b
->exp
, stb
->stream
);
4635 ui_out_field_stream (uiout
, "exp", stb
);
4636 do_cleanups (ui_out_chain
);
4638 case bp_read_watchpoint
:
4639 ui_out_text (uiout
, "Hardware read watchpoint ");
4640 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4641 ui_out_field_int (uiout
, "number", b
->number
);
4642 ui_out_text (uiout
, ": ");
4643 print_expression (b
->exp
, stb
->stream
);
4644 ui_out_field_stream (uiout
, "exp", stb
);
4645 do_cleanups (ui_out_chain
);
4647 case bp_access_watchpoint
:
4648 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4649 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4650 ui_out_field_int (uiout
, "number", b
->number
);
4651 ui_out_text (uiout
, ": ");
4652 print_expression (b
->exp
, stb
->stream
);
4653 ui_out_field_stream (uiout
, "exp", stb
);
4654 do_cleanups (ui_out_chain
);
4657 if (ui_out_is_mi_like_p (uiout
))
4662 printf_filtered ("Breakpoint %d", b
->number
);
4665 case bp_hardware_breakpoint
:
4666 if (ui_out_is_mi_like_p (uiout
))
4671 printf_filtered ("Hardware assisted breakpoint %d", b
->number
);
4675 case bp_catch_unload
:
4676 printf_filtered ("Catchpoint %d (%s %s)",
4678 (b
->type
== bp_catch_load
) ? "load" : "unload",
4679 (b
->dll_pathname
!= NULL
) ?
4680 b
->dll_pathname
: "<any library>");
4683 case bp_catch_vfork
:
4684 printf_filtered ("Catchpoint %d (%s)",
4686 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4689 printf_filtered ("Catchpoint %d (exec)",
4692 case bp_catch_catch
:
4693 case bp_catch_throw
:
4694 printf_filtered ("Catchpoint %d (%s)",
4696 (b
->type
== bp_catch_catch
) ? "catch" : "throw");
4702 case bp_longjmp_resume
:
4703 case bp_step_resume
:
4704 case bp_through_sigtramp
:
4706 case bp_watchpoint_scope
:
4707 case bp_shlib_event
:
4708 case bp_thread_event
:
4709 case bp_overlay_event
:
4715 if (addressprint
|| b
->source_file
== NULL
)
4717 printf_filtered (" at ");
4718 print_address_numeric (b
->loc
->address
, 1, gdb_stdout
);
4721 printf_filtered (": file %s, line %d.",
4722 b
->source_file
, b
->line_number
);
4724 do_cleanups (old_chain
);
4725 if (ui_out_is_mi_like_p (uiout
))
4727 printf_filtered ("\n");
4731 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4732 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4733 COND[i] and COND_STRING[i] values.
4735 NOTE: If the function succeeds, the caller is expected to cleanup
4736 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4737 array contents). If the function fails (error() is called), the
4738 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4739 COND and SALS arrays and each of those arrays contents. */
4742 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
4743 struct expression
**cond
, char **cond_string
,
4744 enum bptype type
, enum bpdisp disposition
,
4745 int thread
, int ignore_count
, int from_tty
)
4747 if (type
== bp_hardware_breakpoint
)
4749 int i
= hw_breakpoint_used_count ();
4750 int target_resources_ok
=
4751 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
4753 if (target_resources_ok
== 0)
4754 error ("No hardware breakpoint support in the target.");
4755 else if (target_resources_ok
< 0)
4756 error ("Hardware breakpoints used exceeds limit.");
4759 /* Now set all the breakpoints. */
4762 for (i
= 0; i
< sals
.nelts
; i
++)
4764 struct breakpoint
*b
;
4765 struct symtab_and_line sal
= sals
.sals
[i
];
4768 describe_other_breakpoints (sal
.pc
, sal
.section
);
4770 b
= set_raw_breakpoint (sal
, type
);
4771 set_breakpoint_count (breakpoint_count
+ 1);
4772 b
->number
= breakpoint_count
;
4776 b
->addr_string
= addr_string
[i
];
4778 /* addr_string has to be used or breakpoint_re_set will delete
4780 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->loc
->address
));
4781 b
->cond_string
= cond_string
[i
];
4782 b
->ignore_count
= ignore_count
;
4783 b
->enable_state
= bp_enabled
;
4784 b
->disposition
= disposition
;
4790 /* Parse ARG which is assumed to be a SAL specification possibly
4791 followed by conditionals. On return, SALS contains an array of SAL
4792 addresses found. ADDR_STRING contains a vector of (canonical)
4793 address strings. ARG points to the end of the SAL. */
4796 parse_breakpoint_sals (char **address
,
4797 struct symtabs_and_lines
*sals
,
4798 char ***addr_string
)
4800 char *addr_start
= *address
;
4801 *addr_string
= NULL
;
4802 /* If no arg given, or if first arg is 'if ', use the default
4804 if ((*address
) == NULL
4805 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
4807 if (default_breakpoint_valid
)
4809 struct symtab_and_line sal
;
4810 init_sal (&sal
); /* initialize to zeroes */
4811 sals
->sals
= (struct symtab_and_line
*)
4812 xmalloc (sizeof (struct symtab_and_line
));
4813 sal
.pc
= default_breakpoint_address
;
4814 sal
.line
= default_breakpoint_line
;
4815 sal
.symtab
= default_breakpoint_symtab
;
4816 sal
.section
= find_pc_overlay (sal
.pc
);
4817 sals
->sals
[0] = sal
;
4821 error ("No default breakpoint address now.");
4825 /* Force almost all breakpoints to be in terms of the
4826 current_source_symtab (which is decode_line_1's default). This
4827 should produce the results we want almost all of the time while
4828 leaving default_breakpoint_* alone.
4829 ObjC: However, don't match an Objective-C method name which
4830 may have a '+' or '-' succeeded by a '[' */
4832 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
4834 if (default_breakpoint_valid
4836 || ((strchr ("+-", (*address
)[0]) != NULL
)
4837 && ((*address
)[1] != '['))))
4838 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
4839 default_breakpoint_line
, addr_string
);
4841 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0, addr_string
);
4843 /* For any SAL that didn't have a canonical string, fill one in. */
4844 if (sals
->nelts
> 0 && *addr_string
== NULL
)
4845 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
4846 if (addr_start
!= (*address
))
4849 for (i
= 0; i
< sals
->nelts
; i
++)
4851 /* Add the string if not present. */
4852 if ((*addr_string
)[i
] == NULL
)
4853 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
4859 /* Convert each SAL into a real PC. Verify that the PC can be
4860 inserted as a breakpoint. If it can't throw an error. */
4863 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
4867 for (i
= 0; i
< sals
->nelts
; i
++)
4869 resolve_sal_pc (&sals
->sals
[i
]);
4871 /* It's possible for the PC to be nonzero, but still an illegal
4872 value on some targets.
4874 For example, on HP-UX if you start gdb, and before running the
4875 inferior you try to set a breakpoint on a shared library function
4876 "foo" where the inferior doesn't call "foo" directly but does
4877 pass its address to another function call, then we do find a
4878 minimal symbol for the "foo", but it's address is invalid.
4879 (Appears to be an index into a table that the loader sets up
4880 when the inferior is run.)
4882 Give the target a chance to bless sals.sals[i].pc before we
4883 try to make a breakpoint for it. */
4884 if (PC_REQUIRES_RUN_BEFORE_USE (sals
->sals
[i
].pc
))
4886 if (address
== NULL
)
4887 error ("Cannot break without a running program.");
4889 error ("Cannot break on %s without a running program.",
4895 /* Set a breakpoint according to ARG (function, linenum or *address)
4896 flag: first bit : 0 non-temporary, 1 temporary.
4897 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
4900 break_command_1 (char *arg
, int flag
, int from_tty
)
4902 int tempflag
, hardwareflag
;
4903 struct symtabs_and_lines sals
;
4904 struct expression
**cond
= 0;
4905 /* Pointers in arg to the start, and one past the end, of the
4907 char **cond_string
= (char **) NULL
;
4908 char *addr_start
= arg
;
4910 struct cleanup
*old_chain
;
4911 struct cleanup
*breakpoint_chain
= NULL
;
4914 int ignore_count
= 0;
4916 hardwareflag
= flag
& BP_HARDWAREFLAG
;
4917 tempflag
= flag
& BP_TEMPFLAG
;
4922 parse_breakpoint_sals (&arg
, &sals
, &addr_string
);
4927 /* Create a chain of things that always need to be cleaned up. */
4928 old_chain
= make_cleanup (null_cleanup
, 0);
4930 /* Make sure that all storage allocated to SALS gets freed. */
4931 make_cleanup (xfree
, sals
.sals
);
4933 /* Cleanup the addr_string array but not its contents. */
4934 make_cleanup (xfree
, addr_string
);
4936 /* Allocate space for all the cond expressions. */
4937 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
4938 make_cleanup (xfree
, cond
);
4940 /* Allocate space for all the cond strings. */
4941 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
4942 make_cleanup (xfree
, cond_string
);
4944 /* ----------------------------- SNIP -----------------------------
4945 Anything added to the cleanup chain beyond this point is assumed
4946 to be part of a breakpoint. If the breakpoint create succeeds
4947 then the memory is not reclaimed. */
4948 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
4950 /* Mark the contents of the addr_string for cleanup. These go on
4951 the breakpoint_chain and only occure if the breakpoint create
4953 for (i
= 0; i
< sals
.nelts
; i
++)
4955 if (addr_string
[i
] != NULL
)
4956 make_cleanup (xfree
, addr_string
[i
]);
4959 /* Resolve all line numbers to PC's and verify that the addresses
4960 are ok for the target. */
4961 breakpoint_sals_to_pc (&sals
, addr_start
);
4963 /* Verify that condition can be parsed, before setting any
4964 breakpoints. Allocate a separate condition expression for each
4966 thread
= -1; /* No specific thread yet */
4967 for (i
= 0; i
< sals
.nelts
; i
++)
4974 char *cond_start
= NULL
;
4975 char *cond_end
= NULL
;
4976 while (*tok
== ' ' || *tok
== '\t')
4981 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
4984 toklen
= end_tok
- tok
;
4986 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
4988 tok
= cond_start
= end_tok
+ 1;
4989 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
4990 make_cleanup (xfree
, cond
[i
]);
4992 cond_string
[i
] = savestring (cond_start
, cond_end
- cond_start
);
4993 make_cleanup (xfree
, cond_string
[i
]);
4995 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5001 thread
= strtol (tok
, &tok
, 0);
5003 error ("Junk after thread keyword.");
5004 if (!valid_thread_id (thread
))
5005 error ("Unknown thread %d\n", thread
);
5008 error ("Junk at end of arguments.");
5012 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5013 hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
5014 tempflag
? disp_del
: disp_donttouch
,
5015 thread
, ignore_count
, from_tty
);
5019 warning ("Multiple breakpoints were set.");
5020 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5022 /* That's it. Discard the cleanups for data inserted into the
5024 discard_cleanups (breakpoint_chain
);
5025 /* But cleanup everything else. */
5026 do_cleanups (old_chain
);
5029 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
5030 linenum or *address) with COND and IGNORE_COUNT. */
5032 struct captured_breakpoint_args
5043 do_captured_breakpoint (void *data
)
5045 struct captured_breakpoint_args
*args
= data
;
5046 struct symtabs_and_lines sals
;
5047 struct expression
**cond
;
5048 struct cleanup
*old_chain
;
5049 struct cleanup
*breakpoint_chain
= NULL
;
5056 /* Parse the source and lines spec. Delay check that the expression
5057 didn't contain trailing garbage until after cleanups are in
5061 address_end
= args
->address
;
5063 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
);
5068 /* Create a chain of things at always need to be cleaned up. */
5069 old_chain
= make_cleanup (null_cleanup
, 0);
5071 /* Always have a addr_string array, even if it is empty. */
5072 make_cleanup (xfree
, addr_string
);
5074 /* Make sure that all storage allocated to SALS gets freed. */
5075 make_cleanup (xfree
, sals
.sals
);
5077 /* Allocate space for all the cond expressions. */
5078 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5079 make_cleanup (xfree
, cond
);
5081 /* Allocate space for all the cond strings. */
5082 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5083 make_cleanup (xfree
, cond_string
);
5085 /* ----------------------------- SNIP -----------------------------
5086 Anything added to the cleanup chain beyond this point is assumed
5087 to be part of a breakpoint. If the breakpoint create goes
5088 through then that memory is not cleaned up. */
5089 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5091 /* Mark the contents of the addr_string for cleanup. These go on
5092 the breakpoint_chain and only occure if the breakpoint create
5094 for (i
= 0; i
< sals
.nelts
; i
++)
5096 if (addr_string
[i
] != NULL
)
5097 make_cleanup (xfree
, addr_string
[i
]);
5100 /* Wait until now before checking for garbage at the end of the
5101 address. That way cleanups can take care of freeing any
5103 if (*address_end
!= '\0')
5104 error ("Garbage %s following breakpoint address", address_end
);
5106 /* Resolve all line numbers to PC's. */
5107 breakpoint_sals_to_pc (&sals
, args
->address
);
5109 /* Verify that conditions can be parsed, before setting any
5111 for (i
= 0; i
< sals
.nelts
; i
++)
5113 if (args
->condition
!= NULL
)
5115 char *tok
= args
->condition
;
5116 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
5118 error ("Garbage %s follows condition", tok
);
5119 make_cleanup (xfree
, cond
[i
]);
5120 cond_string
[i
] = xstrdup (args
->condition
);
5124 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5125 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
5126 args
->tempflag
? disp_del
: disp_donttouch
,
5127 args
->thread
, args
->ignore_count
, 0/*from-tty*/);
5129 /* That's it. Discard the cleanups for data inserted into the
5131 discard_cleanups (breakpoint_chain
);
5132 /* But cleanup everything else. */
5133 do_cleanups (old_chain
);
5138 gdb_breakpoint (char *address
, char *condition
,
5139 int hardwareflag
, int tempflag
,
5140 int thread
, int ignore_count
)
5142 struct captured_breakpoint_args args
;
5143 args
.address
= address
;
5144 args
.condition
= condition
;
5145 args
.hardwareflag
= hardwareflag
;
5146 args
.tempflag
= tempflag
;
5147 args
.thread
= thread
;
5148 args
.ignore_count
= ignore_count
;
5149 return catch_errors (do_captured_breakpoint
, &args
,
5150 NULL
, RETURN_MASK_ALL
);
5155 break_at_finish_at_depth_command_1 (char *arg
, int flag
, int from_tty
)
5157 struct frame_info
*frame
;
5158 CORE_ADDR low
, high
, selected_pc
= 0;
5159 char *extra_args
= NULL
;
5161 int extra_args_len
= 0, if_arg
= 0;
5164 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5167 if (default_breakpoint_valid
)
5169 if (deprecated_selected_frame
)
5171 selected_pc
= get_frame_pc (deprecated_selected_frame
);
5176 error ("No selected frame.");
5179 error ("No default breakpoint address now.");
5183 extra_args
= strchr (arg
, ' ');
5187 extra_args_len
= strlen (extra_args
);
5188 level_arg
= (char *) xmalloc (extra_args
- arg
);
5189 strncpy (level_arg
, arg
, extra_args
- arg
- 1);
5190 level_arg
[extra_args
- arg
- 1] = '\0';
5194 level_arg
= (char *) xmalloc (strlen (arg
) + 1);
5195 strcpy (level_arg
, arg
);
5198 frame
= parse_frame_specification (level_arg
);
5200 selected_pc
= get_frame_pc (frame
);
5207 extra_args_len
= strlen (arg
);
5212 if (find_pc_partial_function (selected_pc
, (char **) NULL
, &low
, &high
))
5216 addr_string
= xstrprintf ("*0x%s %s", paddr_nz (high
), extra_args
);
5218 addr_string
= xstrprintf ("*0x%s", paddr_nz (high
));
5219 break_command_1 (addr_string
, flag
, from_tty
);
5220 xfree (addr_string
);
5223 error ("No function contains the specified address");
5226 error ("Unable to set breakpoint at procedure exit");
5231 break_at_finish_command_1 (char *arg
, int flag
, int from_tty
)
5233 char *addr_string
, *break_string
, *beg_addr_string
;
5234 CORE_ADDR low
, high
;
5235 struct symtabs_and_lines sals
;
5236 struct symtab_and_line sal
;
5237 struct cleanup
*old_chain
;
5238 char *extra_args
= NULL
;
5239 int extra_args_len
= 0;
5243 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5245 if (default_breakpoint_valid
)
5247 if (deprecated_selected_frame
)
5249 addr_string
= xstrprintf ("*0x%s",
5250 paddr_nz (get_frame_pc (deprecated_selected_frame
)));
5255 error ("No selected frame.");
5258 error ("No default breakpoint address now.");
5262 addr_string
= (char *) xmalloc (strlen (arg
) + 1);
5263 strcpy (addr_string
, arg
);
5269 extra_args_len
= strlen (arg
);
5273 /* get the stuff after the function name or address */
5274 extra_args
= strchr (arg
, ' ');
5278 extra_args_len
= strlen (extra_args
);
5285 beg_addr_string
= addr_string
;
5286 sals
= decode_line_1 (&addr_string
, 1, (struct symtab
*) NULL
, 0,
5289 xfree (beg_addr_string
);
5290 old_chain
= make_cleanup (xfree
, sals
.sals
);
5291 for (i
= 0; (i
< sals
.nelts
); i
++)
5294 if (find_pc_partial_function (sal
.pc
, (char **) NULL
, &low
, &high
))
5298 break_string
= xstrprintf ("*0x%s %s", paddr_nz (high
),
5301 break_string
= xstrprintf ("*0x%s", paddr_nz (high
));
5302 break_command_1 (break_string
, flag
, from_tty
);
5303 xfree (break_string
);
5306 error ("No function contains the specified address");
5310 warning ("Multiple breakpoints were set.\n");
5311 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5313 do_cleanups (old_chain
);
5317 /* Helper function for break_command_1 and disassemble_command. */
5320 resolve_sal_pc (struct symtab_and_line
*sal
)
5324 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5326 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5327 error ("No line %d in file \"%s\".",
5328 sal
->line
, sal
->symtab
->filename
);
5332 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5334 struct blockvector
*bv
;
5339 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &index
, sal
->symtab
);
5342 b
= BLOCKVECTOR_BLOCK (bv
, index
);
5343 sym
= block_function (b
);
5346 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5347 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5351 /* It really is worthwhile to have the section, so we'll just
5352 have to look harder. This case can be executed if we have
5353 line numbers but no functions (as can happen in assembly
5356 struct minimal_symbol
*msym
;
5358 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5360 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5367 break_command (char *arg
, int from_tty
)
5369 break_command_1 (arg
, 0, from_tty
);
5373 break_at_finish_command (char *arg
, int from_tty
)
5375 break_at_finish_command_1 (arg
, 0, from_tty
);
5379 break_at_finish_at_depth_command (char *arg
, int from_tty
)
5381 break_at_finish_at_depth_command_1 (arg
, 0, from_tty
);
5385 tbreak_command (char *arg
, int from_tty
)
5387 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5391 tbreak_at_finish_command (char *arg
, int from_tty
)
5393 break_at_finish_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5397 hbreak_command (char *arg
, int from_tty
)
5399 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5403 thbreak_command (char *arg
, int from_tty
)
5405 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5409 stop_command (char *arg
, int from_tty
)
5411 printf_filtered ("Specify the type of breakpoint to set.\n\
5412 Usage: stop in <function | address>\n\
5417 stopin_command (char *arg
, int from_tty
)
5421 if (arg
== (char *) NULL
)
5423 else if (*arg
!= '*')
5428 /* look for a ':'. If this is a line number specification, then
5429 say it is bad, otherwise, it should be an address or
5430 function/method name */
5431 while (*argptr
&& !hasColon
)
5433 hasColon
= (*argptr
== ':');
5438 badInput
= (*argptr
!= ':'); /* Not a class::method */
5440 badInput
= isdigit (*arg
); /* a simple line number */
5444 printf_filtered ("Usage: stop in <function | address>\n");
5446 break_command_1 (arg
, 0, from_tty
);
5450 stopat_command (char *arg
, int from_tty
)
5454 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5461 /* look for a ':'. If there is a '::' then get out, otherwise
5462 it is probably a line number. */
5463 while (*argptr
&& !hasColon
)
5465 hasColon
= (*argptr
== ':');
5470 badInput
= (*argptr
== ':'); /* we have class::method */
5472 badInput
= !isdigit (*arg
); /* not a line number */
5476 printf_filtered ("Usage: stop at <line>\n");
5478 break_command_1 (arg
, 0, from_tty
);
5481 /* accessflag: hw_write: watch write,
5482 hw_read: watch read,
5483 hw_access: watch access (read or write) */
5485 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5487 struct breakpoint
*b
;
5488 struct symtab_and_line sal
;
5489 struct expression
*exp
;
5490 struct block
*exp_valid_block
;
5491 struct value
*val
, *mark
;
5492 struct frame_info
*frame
;
5493 struct frame_info
*prev_frame
= NULL
;
5494 char *exp_start
= NULL
;
5495 char *exp_end
= NULL
;
5496 char *tok
, *end_tok
;
5498 char *cond_start
= NULL
;
5499 char *cond_end
= NULL
;
5500 struct expression
*cond
= NULL
;
5501 int i
, other_type_used
, target_resources_ok
= 0;
5502 enum bptype bp_type
;
5505 init_sal (&sal
); /* initialize to zeroes */
5507 /* Parse arguments. */
5508 innermost_block
= NULL
;
5510 exp
= parse_exp_1 (&arg
, 0, 0);
5512 exp_valid_block
= innermost_block
;
5513 mark
= value_mark ();
5514 val
= evaluate_expression (exp
);
5515 release_value (val
);
5516 if (VALUE_LAZY (val
))
5517 value_fetch_lazy (val
);
5520 while (*tok
== ' ' || *tok
== '\t')
5524 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5527 toklen
= end_tok
- tok
;
5528 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5530 tok
= cond_start
= end_tok
+ 1;
5531 cond
= parse_exp_1 (&tok
, 0, 0);
5535 error ("Junk at end of command.");
5537 if (accessflag
== hw_read
)
5538 bp_type
= bp_read_watchpoint
;
5539 else if (accessflag
== hw_access
)
5540 bp_type
= bp_access_watchpoint
;
5542 bp_type
= bp_hardware_watchpoint
;
5544 mem_cnt
= can_use_hardware_watchpoint (val
);
5545 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5546 error ("Expression cannot be implemented with read/access watchpoint.");
5549 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5550 target_resources_ok
=
5551 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5553 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5554 error ("Target does not support this type of hardware watchpoint.");
5556 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5557 error ("Target can only support one kind of HW watchpoint at a time.");
5560 #if defined(HPUXHPPA)
5561 /* On HP-UX if you set a h/w
5562 watchpoint before the "run" command, the inferior dies with a e.g.,
5563 SIGILL once you start it. I initially believed this was due to a
5564 bad interaction between page protection traps and the initial
5565 startup sequence by the dynamic linker.
5567 However, I tried avoiding that by having HP-UX's implementation of
5568 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5569 yet, which forced slow watches before a "run" or "attach", and it
5570 still fails somewhere in the startup code.
5572 Until I figure out what's happening, I'm disallowing watches altogether
5573 before the "run" or "attach" command. We'll tell the user they must
5574 set watches after getting the program started. */
5575 if (!target_has_execution
)
5577 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5580 #endif /* HPUXHPPA */
5582 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5583 watchpoint could not be set. */
5584 if (!mem_cnt
|| target_resources_ok
<= 0)
5585 bp_type
= bp_watchpoint
;
5587 /* Now set up the breakpoint. */
5588 b
= set_raw_breakpoint (sal
, bp_type
);
5589 set_breakpoint_count (breakpoint_count
+ 1);
5590 b
->number
= breakpoint_count
;
5591 b
->disposition
= disp_donttouch
;
5593 b
->exp_valid_block
= exp_valid_block
;
5594 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5598 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5602 frame
= block_innermost_frame (exp_valid_block
);
5605 prev_frame
= get_prev_frame (frame
);
5606 b
->watchpoint_frame
= get_frame_id (frame
);
5610 memset (&b
->watchpoint_frame
, 0, sizeof (b
->watchpoint_frame
));
5613 /* If the expression is "local", then set up a "watchpoint scope"
5614 breakpoint at the point where we've left the scope of the watchpoint
5616 if (innermost_block
)
5620 struct breakpoint
*scope_breakpoint
;
5621 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5622 bp_watchpoint_scope
);
5624 scope_breakpoint
->enable_state
= bp_enabled
;
5626 /* Automatically delete the breakpoint when it hits. */
5627 scope_breakpoint
->disposition
= disp_del
;
5629 /* Only break in the proper frame (help with recursion). */
5630 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5632 /* Set the address at which we will stop. */
5633 scope_breakpoint
->loc
->requested_address
5634 = get_frame_pc (prev_frame
);
5635 scope_breakpoint
->loc
->address
5636 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
);
5638 /* The scope breakpoint is related to the watchpoint. We
5639 will need to act on them together. */
5640 b
->related_breakpoint
= scope_breakpoint
;
5643 value_free_to_mark (mark
);
5647 /* Return count of locations need to be watched and can be handled
5648 in hardware. If the watchpoint can not be handled
5649 in hardware return zero. */
5651 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
5652 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
5653 ((BYTE_SIZE) <= (DEPRECATED_REGISTER_SIZE))
5656 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5657 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5658 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5662 can_use_hardware_watchpoint (struct value
*v
)
5664 int found_memory_cnt
= 0;
5665 struct value
*head
= v
;
5667 /* Did the user specifically forbid us to use hardware watchpoints? */
5668 if (!can_use_hw_watchpoints
)
5671 /* Make sure that the value of the expression depends only upon
5672 memory contents, and values computed from them within GDB. If we
5673 find any register references or function calls, we can't use a
5674 hardware watchpoint.
5676 The idea here is that evaluating an expression generates a series
5677 of values, one holding the value of every subexpression. (The
5678 expression a*b+c has five subexpressions: a, b, a*b, c, and
5679 a*b+c.) GDB's values hold almost enough information to establish
5680 the criteria given above --- they identify memory lvalues,
5681 register lvalues, computed values, etcetera. So we can evaluate
5682 the expression, and then scan the chain of values that leaves
5683 behind to decide whether we can detect any possible change to the
5684 expression's final value using only hardware watchpoints.
5686 However, I don't think that the values returned by inferior
5687 function calls are special in any way. So this function may not
5688 notice that an expression involving an inferior function call
5689 can't be watched with hardware watchpoints. FIXME. */
5690 for (; v
; v
= v
->next
)
5692 if (VALUE_LVAL (v
) == lval_memory
)
5695 /* A lazy memory lvalue is one that GDB never needed to fetch;
5696 we either just used its address (e.g., `a' in `a.b') or
5697 we never needed it at all (e.g., `a' in `a,b'). */
5701 /* Ahh, memory we actually used! Check if we can cover
5702 it with hardware watchpoints. */
5703 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
5705 /* We only watch structs and arrays if user asked for it
5706 explicitly, never if they just happen to appear in a
5707 middle of some value chain. */
5709 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
5710 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
5712 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
5713 int len
= TYPE_LENGTH (VALUE_TYPE (v
));
5715 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
5722 else if (v
->lval
!= not_lval
&& v
->modifiable
== 0)
5723 return 0; /* ??? What does this represent? */
5724 else if (v
->lval
== lval_register
)
5725 return 0; /* cannot watch a register with a HW watchpoint */
5728 /* The expression itself looks suitable for using a hardware
5729 watchpoint, but give the target machine a chance to reject it. */
5730 return found_memory_cnt
;
5734 watch_command_wrapper (char *arg
, int from_tty
)
5736 watch_command (arg
, from_tty
);
5740 watch_command (char *arg
, int from_tty
)
5742 watch_command_1 (arg
, hw_write
, from_tty
);
5746 rwatch_command_wrapper (char *arg
, int from_tty
)
5748 rwatch_command (arg
, from_tty
);
5752 rwatch_command (char *arg
, int from_tty
)
5754 watch_command_1 (arg
, hw_read
, from_tty
);
5758 awatch_command_wrapper (char *arg
, int from_tty
)
5760 awatch_command (arg
, from_tty
);
5764 awatch_command (char *arg
, int from_tty
)
5766 watch_command_1 (arg
, hw_access
, from_tty
);
5770 /* Helper routines for the until_command routine in infcmd.c. Here
5771 because it uses the mechanisms of breakpoints. */
5773 /* This function is called by fetch_inferior_event via the
5774 cmd_continuation pointer, to complete the until command. It takes
5775 care of cleaning up the temporary breakpoints set up by the until
5778 until_break_command_continuation (struct continuation_arg
*arg
)
5780 struct cleanup
*cleanups
;
5782 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
5783 do_exec_cleanups (cleanups
);
5787 until_break_command (char *arg
, int from_tty
, int anywhere
)
5789 struct symtabs_and_lines sals
;
5790 struct symtab_and_line sal
;
5791 struct frame_info
*prev_frame
= get_prev_frame (deprecated_selected_frame
);
5792 struct breakpoint
*breakpoint
;
5793 struct cleanup
*old_chain
;
5794 struct continuation_arg
*arg1
;
5797 clear_proceed_status ();
5799 /* Set a breakpoint where the user wants it and at return from
5802 if (default_breakpoint_valid
)
5803 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
5804 default_breakpoint_line
, (char ***) NULL
);
5806 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
5807 0, (char ***) NULL
);
5809 if (sals
.nelts
!= 1)
5810 error ("Couldn't get information on specified line.");
5813 xfree (sals
.sals
); /* malloc'd, so freed */
5816 error ("Junk at end of arguments.");
5818 resolve_sal_pc (&sal
);
5821 /* If the user told us to continue until a specified location,
5822 we don't specify a frame at which we need to stop. */
5823 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
5825 /* Otherwise, specify the current frame, because we want to stop only
5826 at the very same frame. */
5827 breakpoint
= set_momentary_breakpoint (sal
,
5828 get_frame_id (deprecated_selected_frame
),
5831 if (!event_loop_p
|| !target_can_async_p ())
5832 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
5834 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
5836 /* If we are running asynchronously, and the target supports async
5837 execution, we are not waiting for the target to stop, in the call
5838 tp proceed, below. This means that we cannot delete the
5839 brekpoints until the target has actually stopped. The only place
5840 where we get a chance to do that is in fetch_inferior_event, so
5841 we must set things up for that. */
5843 if (event_loop_p
&& target_can_async_p ())
5845 /* In this case the arg for the continuation is just the point
5846 in the exec_cleanups chain from where to start doing
5847 cleanups, because all the continuation does is the cleanups in
5848 the exec_cleanup_chain. */
5850 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
5852 arg1
->data
.pointer
= old_chain
;
5854 add_continuation (until_break_command_continuation
, arg1
);
5857 /* Keep within the current frame, or in frames called by the current
5861 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
5862 sal
.pc
= get_frame_pc (prev_frame
);
5863 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
5865 if (!event_loop_p
|| !target_can_async_p ())
5866 make_cleanup_delete_breakpoint (breakpoint
);
5868 make_exec_cleanup_delete_breakpoint (breakpoint
);
5871 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
5872 /* Do the cleanups now, anly if we are not running asynchronously,
5873 of if we are, but the target is still synchronous. */
5874 if (!event_loop_p
|| !target_can_async_p ())
5875 do_cleanups (old_chain
);
5879 /* These aren't used; I don't konw what they were for. */
5880 /* Set a breakpoint at the catch clause for NAME. */
5882 catch_breakpoint (char *name
)
5887 disable_catch_breakpoint (void)
5892 delete_catch_breakpoint (void)
5897 enable_catch_breakpoint (void)
5903 ep_skip_leading_whitespace (char **s
)
5905 if ((s
== NULL
) || (*s
== NULL
))
5907 while (isspace (**s
))
5911 /* This function examines a string, and attempts to find a token
5912 that might be an event name in the leading characters. If a
5913 possible match is found, a pointer to the last character of
5914 the token is returned. Else, NULL is returned. */
5917 ep_find_event_name_end (char *arg
)
5920 char *event_name_end
= NULL
;
5922 /* If we could depend upon the presense of strrpbrk, we'd use that... */
5926 /* We break out of the loop when we find a token delimiter.
5927 Basically, we're looking for alphanumerics and underscores;
5928 anything else delimites the token. */
5931 if (!isalnum (*s
) && (*s
!= '_'))
5937 return event_name_end
;
5941 /* This function attempts to parse an optional "if <cond>" clause
5942 from the arg string. If one is not found, it returns NULL.
5944 Else, it returns a pointer to the condition string. (It does not
5945 attempt to evaluate the string against a particular block.) And,
5946 it updates arg to point to the first character following the parsed
5947 if clause in the arg string. */
5950 ep_parse_optional_if_clause (char **arg
)
5954 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
5957 /* Skip the "if" keyword. */
5960 /* Skip any extra leading whitespace, and record the start of the
5961 condition string. */
5962 ep_skip_leading_whitespace (arg
);
5965 /* Assume that the condition occupies the remainder of the arg string. */
5966 (*arg
) += strlen (cond_string
);
5971 /* This function attempts to parse an optional filename from the arg
5972 string. If one is not found, it returns NULL.
5974 Else, it returns a pointer to the parsed filename. (This function
5975 makes no attempt to verify that a file of that name exists, or is
5976 accessible.) And, it updates arg to point to the first character
5977 following the parsed filename in the arg string.
5979 Note that clients needing to preserve the returned filename for
5980 future access should copy it to their own buffers. */
5982 ep_parse_optional_filename (char **arg
)
5984 static char filename
[1024];
5989 if ((*arg_p
== '\0') || isspace (*arg_p
))
6007 /* Commands to deal with catching events, such as signals, exceptions,
6008 process start/exit, etc. */
6012 catch_fork
, catch_vfork
6016 #if defined(CHILD_INSERT_FORK_CATCHPOINT) || defined(CHILD_INSERT_VFORK_CATCHPOINT)
6017 static void catch_fork_command_1 (catch_fork_kind fork_kind
,
6018 char *arg
, int tempflag
, int from_tty
);
6021 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
6024 char *cond_string
= NULL
;
6026 ep_skip_leading_whitespace (&arg
);
6028 /* The allowed syntax is:
6030 catch [v]fork if <cond>
6032 First, check if there's an if clause. */
6033 cond_string
= ep_parse_optional_if_clause (&arg
);
6035 if ((*arg
!= '\0') && !isspace (*arg
))
6036 error ("Junk at end of arguments.");
6038 /* If this target supports it, create a fork or vfork catchpoint
6039 and enable reporting of such events. */
6043 create_fork_event_catchpoint (tempflag
, cond_string
);
6046 create_vfork_event_catchpoint (tempflag
, cond_string
);
6049 error ("unsupported or unknown fork kind; cannot catch it");
6055 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6057 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6059 char *cond_string
= NULL
;
6061 ep_skip_leading_whitespace (&arg
);
6063 /* The allowed syntax is:
6065 catch exec if <cond>
6067 First, check if there's an if clause. */
6068 cond_string
= ep_parse_optional_if_clause (&arg
);
6070 if ((*arg
!= '\0') && !isspace (*arg
))
6071 error ("Junk at end of arguments.");
6073 /* If this target supports it, create an exec catchpoint
6074 and enable reporting of such events. */
6075 create_exec_event_catchpoint (tempflag
, cond_string
);
6079 #if defined(SOLIB_ADD)
6081 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6083 char *dll_pathname
= NULL
;
6084 char *cond_string
= NULL
;
6086 ep_skip_leading_whitespace (&arg
);
6088 /* The allowed syntax is:
6090 catch load if <cond>
6091 catch load <filename>
6092 catch load <filename> if <cond>
6094 The user is not allowed to specify the <filename> after an
6097 We'll ignore the pathological case of a file named "if".
6099 First, check if there's an if clause. If so, then there
6100 cannot be a filename. */
6101 cond_string
= ep_parse_optional_if_clause (&arg
);
6103 /* If there was an if clause, then there cannot be a filename.
6104 Else, there might be a filename and an if clause. */
6105 if (cond_string
== NULL
)
6107 dll_pathname
= ep_parse_optional_filename (&arg
);
6108 ep_skip_leading_whitespace (&arg
);
6109 cond_string
= ep_parse_optional_if_clause (&arg
);
6112 if ((*arg
!= '\0') && !isspace (*arg
))
6113 error ("Junk at end of arguments.");
6115 /* Create a load breakpoint that only triggers when a load of
6116 the specified dll (or any dll, if no pathname was specified)
6118 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6119 dll_pathname
, cond_string
);
6123 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6125 char *dll_pathname
= NULL
;
6126 char *cond_string
= NULL
;
6128 ep_skip_leading_whitespace (&arg
);
6130 /* The allowed syntax is:
6132 catch unload if <cond>
6133 catch unload <filename>
6134 catch unload <filename> if <cond>
6136 The user is not allowed to specify the <filename> after an
6139 We'll ignore the pathological case of a file named "if".
6141 First, check if there's an if clause. If so, then there
6142 cannot be a filename. */
6143 cond_string
= ep_parse_optional_if_clause (&arg
);
6145 /* If there was an if clause, then there cannot be a filename.
6146 Else, there might be a filename and an if clause. */
6147 if (cond_string
== NULL
)
6149 dll_pathname
= ep_parse_optional_filename (&arg
);
6150 ep_skip_leading_whitespace (&arg
);
6151 cond_string
= ep_parse_optional_if_clause (&arg
);
6154 if ((*arg
!= '\0') && !isspace (*arg
))
6155 error ("Junk at end of arguments.");
6157 /* Create an unload breakpoint that only triggers when an unload of
6158 the specified dll (or any dll, if no pathname was specified)
6160 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6161 dll_pathname
, cond_string
);
6163 #endif /* SOLIB_ADD */
6165 /* Commands to deal with catching exceptions. */
6167 /* Set a breakpoint at the specified callback routine for an
6168 exception event callback */
6171 create_exception_catchpoint (int tempflag
, char *cond_string
,
6172 enum exception_event_kind ex_event
,
6173 struct symtab_and_line
*sal
)
6175 struct breakpoint
*b
;
6176 int thread
= -1; /* All threads. */
6179 if (!sal
) /* no exception support? */
6184 case EX_EVENT_THROW
:
6185 bptype
= bp_catch_throw
;
6187 case EX_EVENT_CATCH
:
6188 bptype
= bp_catch_catch
;
6190 default: /* error condition */
6191 error ("Internal error -- invalid catchpoint kind");
6194 b
= set_raw_breakpoint (*sal
, bptype
);
6195 set_breakpoint_count (breakpoint_count
+ 1);
6196 b
->number
= breakpoint_count
;
6198 b
->cond_string
= (cond_string
== NULL
) ?
6199 NULL
: savestring (cond_string
, strlen (cond_string
));
6201 b
->addr_string
= NULL
;
6202 b
->enable_state
= bp_enabled
;
6203 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6207 static enum print_stop_action
6208 print_exception_catchpoint (struct breakpoint
*b
)
6210 annotate_catchpoint (b
->number
);
6212 if (strstr (b
->addr_string
, "throw") != NULL
)
6213 printf_filtered ("\nCatchpoint %d (exception thrown)\n",
6216 printf_filtered ("\nCatchpoint %d (exception caught)\n",
6219 return PRINT_SRC_AND_LOC
;
6223 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6228 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6231 *last_addr
= b
->loc
->address
;
6232 if (strstr (b
->addr_string
, "throw") != NULL
)
6233 ui_out_field_string (uiout
, "what", "exception throw");
6235 ui_out_field_string (uiout
, "what", "exception catch");
6239 print_mention_exception_catchpoint (struct breakpoint
*b
)
6241 if (strstr (b
->addr_string
, "throw") != NULL
)
6242 printf_filtered ("Catchpoint %d (throw)", b
->number
);
6244 printf_filtered ("Catchpoint %d (catch)", b
->number
);
6247 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6248 print_exception_catchpoint
,
6249 print_one_exception_catchpoint
,
6250 print_mention_exception_catchpoint
6254 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6255 enum exception_event_kind ex_event
, int from_tty
)
6257 char *trigger_func_name
, *nameptr
;
6258 struct symtabs_and_lines sals
;
6259 struct breakpoint
*b
;
6261 if (ex_event
== EX_EVENT_CATCH
)
6262 trigger_func_name
= xstrdup ("__cxa_begin_catch");
6264 trigger_func_name
= xstrdup ("__cxa_throw");
6266 nameptr
= trigger_func_name
;
6267 sals
= decode_line_1 (&nameptr
, 1, NULL
, 0, NULL
);
6268 if (sals
.nelts
== 0)
6270 xfree (trigger_func_name
);
6274 b
= set_raw_breakpoint (sals
.sals
[0], bp_breakpoint
);
6275 set_breakpoint_count (breakpoint_count
+ 1);
6276 b
->number
= breakpoint_count
;
6278 b
->cond_string
= (cond_string
== NULL
) ?
6279 NULL
: savestring (cond_string
, strlen (cond_string
));
6281 b
->addr_string
= trigger_func_name
;
6282 b
->enable_state
= bp_enabled
;
6283 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6284 b
->ops
= &gnu_v3_exception_catchpoint_ops
;
6291 /* Deal with "catch catch" and "catch throw" commands */
6294 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6295 int tempflag
, int from_tty
)
6297 char *cond_string
= NULL
;
6298 struct symtab_and_line
*sal
= NULL
;
6300 ep_skip_leading_whitespace (&arg
);
6302 cond_string
= ep_parse_optional_if_clause (&arg
);
6304 if ((*arg
!= '\0') && !isspace (*arg
))
6305 error ("Junk at end of arguments.");
6307 if ((ex_event
!= EX_EVENT_THROW
) &&
6308 (ex_event
!= EX_EVENT_CATCH
))
6309 error ("Unsupported or unknown exception event; cannot catch it");
6311 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6314 /* See if we can find a callback routine */
6315 sal
= target_enable_exception_callback (ex_event
, 1);
6319 /* We have callbacks from the runtime system for exceptions.
6320 Set a breakpoint on the sal found, if no errors */
6321 if (sal
!= (struct symtab_and_line
*) -1)
6322 create_exception_catchpoint (tempflag
, cond_string
, ex_event
, sal
);
6324 return; /* something went wrong with setting up callbacks */
6327 warning ("Unsupported with this platform/compiler combination.");
6330 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6331 inside a catch_errors */
6334 cover_target_enable_exception_callback (void *arg
)
6336 args_for_catchpoint_enable
*args
= arg
;
6337 struct symtab_and_line
*sal
;
6338 sal
= target_enable_exception_callback (args
->kind
, args
->enable_p
);
6341 else if (sal
== (struct symtab_and_line
*) -1)
6344 return 1; /*is valid */
6348 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6351 /* The first argument may be an event name, such as "start" or "load".
6352 If so, then handle it as such. If it doesn't match an event name,
6353 then attempt to interpret it as an exception name. (This latter is
6354 the v4.16-and-earlier GDB meaning of the "catch" command.)
6356 First, try to find the bounds of what might be an event name. */
6357 char *arg1_start
= arg
;
6361 if (arg1_start
== NULL
)
6363 /* Old behaviour was to use pre-v-4.16 syntax */
6364 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6366 /* Now, this is not allowed */
6367 error ("Catch requires an event name.");
6370 arg1_end
= ep_find_event_name_end (arg1_start
);
6371 if (arg1_end
== NULL
)
6372 error ("catch requires an event");
6373 arg1_length
= arg1_end
+ 1 - arg1_start
;
6375 /* Try to match what we found against known event names. */
6376 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6378 error ("Catch of signal not yet implemented");
6380 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6382 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6383 tempflag
, from_tty
);
6385 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6387 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6388 tempflag
, from_tty
);
6390 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6392 error ("Catch of thread_start not yet implemented");
6394 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6396 error ("Catch of thread_exit not yet implemented");
6398 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6400 error ("Catch of thread_join not yet implemented");
6402 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6404 error ("Catch of start not yet implemented");
6406 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6408 error ("Catch of exit not yet implemented");
6410 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6412 #if defined(CHILD_INSERT_FORK_CATCHPOINT)
6413 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6415 error ("Catch of fork not yet implemented");
6418 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6420 #if defined(CHILD_INSERT_VFORK_CATCHPOINT)
6421 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6423 error ("Catch of vfork not yet implemented");
6426 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6428 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6429 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6431 error ("Catch of exec not yet implemented");
6434 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6436 #if defined(SOLIB_ADD)
6437 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6439 error ("Catch of load not implemented");
6442 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6444 #if defined(SOLIB_ADD)
6445 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6447 error ("Catch of load not implemented");
6450 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6452 error ("Catch of stop not yet implemented");
6455 /* This doesn't appear to be an event name */
6459 /* Pre-v.4.16 behaviour was to treat the argument
6460 as the name of an exception */
6461 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6462 /* Now this is not allowed */
6463 error ("Unknown event kind specified for catch");
6468 /* Used by the gui, could be made a worker for other things. */
6471 set_breakpoint_sal (struct symtab_and_line sal
)
6473 struct breakpoint
*b
;
6474 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6475 set_breakpoint_count (breakpoint_count
+ 1);
6476 b
->number
= breakpoint_count
;
6483 /* These aren't used; I don't know what they were for. */
6484 /* Disable breakpoints on all catch clauses described in ARGS. */
6486 disable_catch (char *args
)
6488 /* Map the disable command to catch clauses described in ARGS. */
6491 /* Enable breakpoints on all catch clauses described in ARGS. */
6493 enable_catch (char *args
)
6495 /* Map the disable command to catch clauses described in ARGS. */
6498 /* Delete breakpoints on all catch clauses in the active scope. */
6500 delete_catch (char *args
)
6502 /* Map the delete command to catch clauses described in ARGS. */
6507 catch_command (char *arg
, int from_tty
)
6509 catch_command_1 (arg
, 0, from_tty
);
6514 tcatch_command (char *arg
, int from_tty
)
6516 catch_command_1 (arg
, 1, from_tty
);
6519 /* Delete breakpoints by address or line. */
6522 clear_command (char *arg
, int from_tty
)
6524 struct breakpoint
*b
, *tmp
, *prev
, *found
;
6526 struct symtabs_and_lines sals
;
6527 struct symtab_and_line sal
;
6532 sals
= decode_line_spec (arg
, 1);
6537 sals
.sals
= (struct symtab_and_line
*)
6538 xmalloc (sizeof (struct symtab_and_line
));
6539 make_cleanup (xfree
, sals
.sals
);
6540 init_sal (&sal
); /* initialize to zeroes */
6541 sal
.line
= default_breakpoint_line
;
6542 sal
.symtab
= default_breakpoint_symtab
;
6543 sal
.pc
= default_breakpoint_address
;
6544 if (sal
.symtab
== 0)
6545 error ("No source file specified.");
6553 /* For each line spec given, delete bps which correspond
6554 to it. Do it in two passes, solely to preserve the current
6555 behavior that from_tty is forced true if we delete more than
6559 for (i
= 0; i
< sals
.nelts
; i
++)
6561 /* If exact pc given, clear bpts at that pc.
6562 If line given (pc == 0), clear all bpts on specified line.
6563 If defaulting, clear all bpts on default line
6566 defaulting sal.pc != 0 tests to do
6571 1 0 <can't happen> */
6576 /* Find all matching breakpoints, remove them from the
6577 breakpoint chain, and add them to the 'found' chain. */
6578 ALL_BREAKPOINTS_SAFE (b
, tmp
)
6580 /* Are we going to delete b? */
6581 if (b
->type
!= bp_none
6582 && b
->type
!= bp_watchpoint
6583 && b
->type
!= bp_hardware_watchpoint
6584 && b
->type
!= bp_read_watchpoint
6585 && b
->type
!= bp_access_watchpoint
6586 /* Not if b is a watchpoint of any sort... */
6587 && (((sal
.pc
&& (b
->loc
->address
== sal
.pc
))
6588 && (!section_is_overlay (b
->loc
->section
)
6589 || b
->loc
->section
== sal
.section
))
6590 /* Yes, if sal.pc matches b (modulo overlays). */
6591 || ((default_match
|| (0 == sal
.pc
))
6592 && b
->source_file
!= NULL
6593 && sal
.symtab
!= NULL
6594 && STREQ (b
->source_file
, sal
.symtab
->filename
)
6595 && b
->line_number
== sal
.line
)))
6596 /* Yes, if sal source file and line matches b. */
6598 /* Remove it from breakpoint_chain... */
6599 if (b
== breakpoint_chain
)
6601 /* b is at the head of the list */
6602 breakpoint_chain
= b
->next
;
6606 prev
->next
= b
->next
;
6608 /* And add it to 'found' chain. */
6614 /* Keep b, and keep a pointer to it. */
6619 /* Now go thru the 'found' chain and delete them. */
6623 error ("No breakpoint at %s.", arg
);
6625 error ("No breakpoint at this line.");
6629 from_tty
= 1; /* Always report if deleted more than one */
6631 printf_unfiltered ("Deleted breakpoint%s ", found
->next
? "s" : "");
6632 breakpoints_changed ();
6636 printf_unfiltered ("%d ", found
->number
);
6638 delete_breakpoint (found
);
6642 putchar_unfiltered ('\n');
6645 /* Delete breakpoint in BS if they are `delete' breakpoints and
6646 all breakpoints that are marked for deletion, whether hit or not.
6647 This is called after any breakpoint is hit, or after errors. */
6650 breakpoint_auto_delete (bpstat bs
)
6652 struct breakpoint
*b
, *temp
;
6654 for (; bs
; bs
= bs
->next
)
6655 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== disp_del
6657 delete_breakpoint (bs
->breakpoint_at
);
6659 ALL_BREAKPOINTS_SAFE (b
, temp
)
6661 if (b
->disposition
== disp_del_at_next_stop
)
6662 delete_breakpoint (b
);
6666 /* Delete a breakpoint and clean up all traces of it in the data
6670 delete_breakpoint (struct breakpoint
*bpt
)
6672 struct breakpoint
*b
;
6674 struct bp_location
*loc
;
6677 error ("Internal error (attempted to delete a NULL breakpoint)");
6680 /* Has this bp already been deleted? This can happen because multiple
6681 lists can hold pointers to bp's. bpstat lists are especial culprits.
6683 One example of this happening is a watchpoint's scope bp. When the
6684 scope bp triggers, we notice that the watchpoint is out of scope, and
6685 delete it. We also delete its scope bp. But the scope bp is marked
6686 "auto-deleting", and is already on a bpstat. That bpstat is then
6687 checked for auto-deleting bp's, which are deleted.
6689 A real solution to this problem might involve reference counts in bp's,
6690 and/or giving them pointers back to their referencing bpstat's, and
6691 teaching delete_breakpoint to only free a bp's storage when no more
6692 references were extent. A cheaper bandaid was chosen. */
6693 if (bpt
->type
== bp_none
)
6696 if (delete_breakpoint_hook
)
6697 delete_breakpoint_hook (bpt
);
6698 breakpoint_delete_event (bpt
->number
);
6700 if (bpt
->loc
->inserted
)
6701 remove_breakpoint (bpt
->loc
, mark_inserted
);
6703 if (breakpoint_chain
== bpt
)
6704 breakpoint_chain
= bpt
->next
;
6706 if (bp_location_chain
== bpt
->loc
)
6707 bp_location_chain
= bpt
->loc
->next
;
6709 /* If we have callback-style exception catchpoints, don't go through
6710 the adjustments to the C++ runtime library etc. if the inferior
6711 isn't actually running. target_enable_exception_callback for a
6712 null target ops vector gives an undesirable error message, so we
6713 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6714 exceptions are supported in this way, it's OK for now. FIXME */
6715 if (ep_is_exception_catchpoint (bpt
) && target_has_execution
)
6717 /* Format possible error msg */
6718 char *message
= xstrprintf ("Error in deleting catchpoint %d:\n",
6720 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
6721 args_for_catchpoint_enable args
;
6722 args
.kind
= bpt
->type
== bp_catch_catch
?
6723 EX_EVENT_CATCH
: EX_EVENT_THROW
;
6725 catch_errors (cover_target_enable_exception_callback
, &args
,
6726 message
, RETURN_MASK_ALL
);
6727 do_cleanups (cleanups
);
6734 b
->next
= bpt
->next
;
6738 ALL_BP_LOCATIONS (loc
)
6739 if (loc
->next
== bpt
->loc
)
6741 loc
->next
= bpt
->loc
->next
;
6745 check_duplicates (bpt
);
6746 /* If this breakpoint was inserted, and there is another breakpoint
6747 at the same address, we need to insert the other breakpoint. */
6748 if (bpt
->loc
->inserted
6749 && bpt
->type
!= bp_hardware_watchpoint
6750 && bpt
->type
!= bp_read_watchpoint
6751 && bpt
->type
!= bp_access_watchpoint
6752 && bpt
->type
!= bp_catch_fork
6753 && bpt
->type
!= bp_catch_vfork
6754 && bpt
->type
!= bp_catch_exec
)
6757 if (b
->loc
->address
== bpt
->loc
->address
6758 && b
->loc
->section
== bpt
->loc
->section
6759 && !b
->loc
->duplicate
6760 && b
->enable_state
!= bp_disabled
6761 && b
->enable_state
!= bp_shlib_disabled
6762 && b
->enable_state
!= bp_call_disabled
)
6766 /* We should never reach this point if there is a permanent
6767 breakpoint at the same address as the one being deleted.
6768 If there is a permanent breakpoint somewhere, it should
6769 always be the only one inserted. */
6770 if (b
->enable_state
== bp_permanent
)
6771 internal_error (__FILE__
, __LINE__
,
6772 "another breakpoint was inserted on top of "
6773 "a permanent breakpoint");
6775 if (b
->type
== bp_hardware_breakpoint
)
6776 val
= target_insert_hw_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
6778 val
= target_insert_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
6780 /* If there was an error in the insert, print a message, then stop execution. */
6783 struct ui_file
*tmp_error_stream
= mem_fileopen ();
6784 make_cleanup_ui_file_delete (tmp_error_stream
);
6787 if (b
->type
== bp_hardware_breakpoint
)
6789 fprintf_unfiltered (tmp_error_stream
,
6790 "Cannot insert hardware breakpoint %d.\n"
6791 "You may have requested too many hardware breakpoints.\n",
6796 fprintf_unfiltered (tmp_error_stream
, "Cannot insert breakpoint %d.\n", b
->number
);
6797 fprintf_filtered (tmp_error_stream
, "Error accessing memory address ");
6798 print_address_numeric (b
->loc
->address
, 1, tmp_error_stream
);
6799 fprintf_filtered (tmp_error_stream
, ": %s.\n",
6800 safe_strerror (val
));
6803 fprintf_unfiltered (tmp_error_stream
,"The same program may be running in another process.");
6804 target_terminal_ours_for_output ();
6805 error_stream(tmp_error_stream
);
6808 b
->loc
->inserted
= 1;
6812 free_command_lines (&bpt
->commands
);
6815 if (bpt
->cond_string
!= NULL
)
6816 xfree (bpt
->cond_string
);
6817 if (bpt
->addr_string
!= NULL
)
6818 xfree (bpt
->addr_string
);
6819 if (bpt
->exp
!= NULL
)
6821 if (bpt
->exp_string
!= NULL
)
6822 xfree (bpt
->exp_string
);
6823 if (bpt
->val
!= NULL
)
6824 value_free (bpt
->val
);
6825 if (bpt
->source_file
!= NULL
)
6826 xfree (bpt
->source_file
);
6827 if (bpt
->dll_pathname
!= NULL
)
6828 xfree (bpt
->dll_pathname
);
6829 if (bpt
->triggered_dll_pathname
!= NULL
)
6830 xfree (bpt
->triggered_dll_pathname
);
6831 if (bpt
->exec_pathname
!= NULL
)
6832 xfree (bpt
->exec_pathname
);
6834 /* Be sure no bpstat's are pointing at it after it's been freed. */
6835 /* FIXME, how can we find all bpstat's?
6836 We just check stop_bpstat for now. */
6837 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
6838 if (bs
->breakpoint_at
== bpt
)
6840 bs
->breakpoint_at
= NULL
;
6842 /* bs->commands will be freed later. */
6844 /* On the chance that someone will soon try again to delete this same
6845 bp, we mark it as deleted before freeing its storage. */
6846 bpt
->type
= bp_none
;
6853 do_delete_breakpoint_cleanup (void *b
)
6855 delete_breakpoint (b
);
6859 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
6861 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
6865 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
6867 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
6871 delete_command (char *arg
, int from_tty
)
6873 struct breakpoint
*b
, *temp
;
6879 int breaks_to_delete
= 0;
6881 /* Delete all breakpoints if no argument.
6882 Do not delete internal or call-dummy breakpoints, these
6883 have to be deleted with an explicit breakpoint number argument. */
6886 if (b
->type
!= bp_call_dummy
&&
6887 b
->type
!= bp_shlib_event
&&
6888 b
->type
!= bp_thread_event
&&
6889 b
->type
!= bp_overlay_event
&&
6891 breaks_to_delete
= 1;
6894 /* Ask user only if there are some breakpoints to delete. */
6896 || (breaks_to_delete
&& query ("Delete all breakpoints? ")))
6898 ALL_BREAKPOINTS_SAFE (b
, temp
)
6900 if (b
->type
!= bp_call_dummy
&&
6901 b
->type
!= bp_shlib_event
&&
6902 b
->type
!= bp_thread_event
&&
6903 b
->type
!= bp_overlay_event
&&
6905 delete_breakpoint (b
);
6910 map_breakpoint_numbers (arg
, delete_breakpoint
);
6913 /* Reset a breakpoint given it's struct breakpoint * BINT.
6914 The value we return ends up being the return value from catch_errors.
6915 Unused in this case. */
6918 breakpoint_re_set_one (void *bint
)
6920 /* get past catch_errs */
6921 struct breakpoint
*b
= (struct breakpoint
*) bint
;
6924 struct symtabs_and_lines sals
;
6926 enum enable_state save_enable
;
6931 warning ("attempted to reset apparently deleted breakpoint #%d?",
6935 case bp_hardware_breakpoint
:
6937 case bp_catch_unload
:
6938 if (b
->addr_string
== NULL
)
6940 /* Anything without a string can't be re-set. */
6941 delete_breakpoint (b
);
6944 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
6946 ``And a hack it is, although Apple's Darwin version of GDB
6947 contains an almost identical hack to implement a "future
6948 break" command. It seems to work in many real world cases,
6949 but it is easy to come up with a test case where the patch
6950 doesn't help at all.''
6952 ``It seems that the way GDB implements breakpoints - in -
6953 shared - libraries was designed for a.out shared library
6954 systems (SunOS 4) where shared libraries were loaded at a
6955 fixed address in memory. Since ELF shared libraries can (and
6956 will) be loaded at any address in memory, things break.
6957 Fixing this is not trivial. Therefore, I'm not sure whether
6958 we should add this hack to the branch only. I cannot
6959 guarantee that things will be fixed on the trunk in the near
6962 In case we have a problem, disable this breakpoint. We'll
6963 restore its status if we succeed. Don't disable a
6964 shlib_disabled breakpoint though. There's a fair chance we
6965 can't re-set it if the shared library it's in hasn't been
6967 save_enable
= b
->enable_state
;
6968 if (b
->enable_state
!= bp_shlib_disabled
)
6969 b
->enable_state
= bp_disabled
;
6971 set_language (b
->language
);
6972 input_radix
= b
->input_radix
;
6974 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
);
6975 for (i
= 0; i
< sals
.nelts
; i
++)
6977 resolve_sal_pc (&sals
.sals
[i
]);
6979 /* Reparse conditions, they might contain references to the
6981 if (b
->cond_string
!= NULL
)
6986 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
6989 /* We need to re-set the breakpoint if the address changes... */
6990 if (b
->loc
->address
!= sals
.sals
[i
].pc
6991 /* ...or new and old breakpoints both have source files, and
6992 the source file name or the line number changes... */
6993 || (b
->source_file
!= NULL
6994 && sals
.sals
[i
].symtab
!= NULL
6995 && (!STREQ (b
->source_file
, sals
.sals
[i
].symtab
->filename
)
6996 || b
->line_number
!= sals
.sals
[i
].line
)
6998 /* ...or we switch between having a source file and not having
7000 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
7003 if (b
->source_file
!= NULL
)
7004 xfree (b
->source_file
);
7005 if (sals
.sals
[i
].symtab
== NULL
)
7006 b
->source_file
= NULL
;
7009 savestring (sals
.sals
[i
].symtab
->filename
,
7010 strlen (sals
.sals
[i
].symtab
->filename
));
7011 b
->line_number
= sals
.sals
[i
].line
;
7012 b
->loc
->requested_address
= sals
.sals
[i
].pc
;
7014 = adjust_breakpoint_address (b
->loc
->requested_address
);
7016 /* Used to check for duplicates here, but that can
7017 cause trouble, as it doesn't check for disabled
7022 /* Might be better to do this just once per breakpoint_re_set,
7023 rather than once for every breakpoint. */
7024 breakpoints_changed ();
7026 b
->loc
->section
= sals
.sals
[i
].section
;
7027 b
->enable_state
= save_enable
; /* Restore it, this worked. */
7030 /* Now that this is re-enabled, check_duplicates
7032 check_duplicates (b
);
7039 case bp_hardware_watchpoint
:
7040 case bp_read_watchpoint
:
7041 case bp_access_watchpoint
:
7042 innermost_block
= NULL
;
7043 /* The issue arises of what context to evaluate this in. The
7044 same one as when it was set, but what does that mean when
7045 symbols have been re-read? We could save the filename and
7046 functionname, but if the context is more local than that, the
7047 best we could do would be something like how many levels deep
7048 and which index at that particular level, but that's going to
7049 be less stable than filenames or function names. */
7051 /* So for now, just use a global context. */
7054 b
->exp
= parse_expression (b
->exp_string
);
7055 b
->exp_valid_block
= innermost_block
;
7056 mark
= value_mark ();
7058 value_free (b
->val
);
7059 b
->val
= evaluate_expression (b
->exp
);
7060 release_value (b
->val
);
7061 if (VALUE_LAZY (b
->val
) && b
->enable_state
== bp_enabled
)
7062 value_fetch_lazy (b
->val
);
7064 if (b
->cond_string
!= NULL
)
7069 b
->cond
= parse_exp_1 (&s
, (struct block
*) 0, 0);
7071 if (b
->enable_state
== bp_enabled
)
7073 value_free_to_mark (mark
);
7075 case bp_catch_catch
:
7076 case bp_catch_throw
:
7078 /* We needn't really do anything to reset these, since the mask
7079 that requests them is unaffected by e.g., new libraries being
7082 case bp_catch_vfork
:
7087 printf_filtered ("Deleting unknown breakpoint type %d\n", b
->type
);
7089 /* Delete longjmp and overlay event breakpoints; they will be
7090 reset later by breakpoint_re_set. */
7092 case bp_longjmp_resume
:
7093 case bp_overlay_event
:
7094 delete_breakpoint (b
);
7097 /* This breakpoint is special, it's set up when the inferior
7098 starts and we really don't want to touch it. */
7099 case bp_shlib_event
:
7101 /* Like bp_shlib_event, this breakpoint type is special.
7102 Once it is set up, we do not want to touch it. */
7103 case bp_thread_event
:
7105 /* Keep temporary breakpoints, which can be encountered when we step
7106 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7107 Otherwise these should have been blown away via the cleanup chain
7108 or by breakpoint_init_inferior when we rerun the executable. */
7111 case bp_watchpoint_scope
:
7113 case bp_step_resume
:
7120 /* Re-set all breakpoints after symbols have been re-loaded. */
7122 breakpoint_re_set (void)
7124 struct breakpoint
*b
, *temp
;
7125 enum language save_language
;
7126 int save_input_radix
;
7128 save_language
= current_language
->la_language
;
7129 save_input_radix
= input_radix
;
7130 ALL_BREAKPOINTS_SAFE (b
, temp
)
7132 /* Format possible error msg */
7133 char *message
= xstrprintf ("Error in re-setting breakpoint %d:\n",
7135 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7136 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7137 do_cleanups (cleanups
);
7139 set_language (save_language
);
7140 input_radix
= save_input_radix
;
7142 if (GET_LONGJMP_TARGET_P ())
7144 create_longjmp_breakpoint ("longjmp");
7145 create_longjmp_breakpoint ("_longjmp");
7146 create_longjmp_breakpoint ("siglongjmp");
7147 create_longjmp_breakpoint ("_siglongjmp");
7148 create_longjmp_breakpoint (NULL
);
7151 create_overlay_event_breakpoint ("_ovly_debug_event");
7154 /* Reset the thread number of this breakpoint:
7156 - If the breakpoint is for all threads, leave it as-is.
7157 - Else, reset it to the current thread for inferior_ptid. */
7159 breakpoint_re_set_thread (struct breakpoint
*b
)
7161 if (b
->thread
!= -1)
7163 if (in_thread_list (inferior_ptid
))
7164 b
->thread
= pid_to_thread_id (inferior_ptid
);
7168 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7169 If from_tty is nonzero, it prints a message to that effect,
7170 which ends with a period (no newline). */
7173 set_ignore_count (int bptnum
, int count
, int from_tty
)
7175 struct breakpoint
*b
;
7181 if (b
->number
== bptnum
)
7183 b
->ignore_count
= count
;
7187 printf_filtered ("Will stop next time breakpoint %d is reached.",
7189 else if (count
== 1)
7190 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7193 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7196 breakpoints_changed ();
7197 breakpoint_modify_event (b
->number
);
7201 error ("No breakpoint number %d.", bptnum
);
7204 /* Clear the ignore counts of all breakpoints. */
7206 breakpoint_clear_ignore_counts (void)
7208 struct breakpoint
*b
;
7211 b
->ignore_count
= 0;
7214 /* Command to set ignore-count of breakpoint N to COUNT. */
7217 ignore_command (char *args
, int from_tty
)
7223 error_no_arg ("a breakpoint number");
7225 num
= get_number (&p
);
7227 error ("bad breakpoint number: '%s'", args
);
7229 error ("Second argument (specified ignore-count) is missing.");
7231 set_ignore_count (num
,
7232 longest_to_int (value_as_long (parse_and_eval (p
))),
7235 printf_filtered ("\n");
7238 /* Call FUNCTION on each of the breakpoints
7239 whose numbers are given in ARGS. */
7242 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7247 struct breakpoint
*b
, *tmp
;
7251 error_no_arg ("one or more breakpoint numbers");
7258 num
= get_number_or_range (&p1
);
7261 warning ("bad breakpoint number at or near '%s'", p
);
7265 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7266 if (b
->number
== num
)
7268 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7271 if (related_breakpoint
)
7272 function (related_breakpoint
);
7276 printf_unfiltered ("No breakpoint number %d.\n", num
);
7282 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7283 If from_tty is nonzero, it prints a message to that effect,
7284 which ends with a period (no newline). */
7287 disable_breakpoint (struct breakpoint
*bpt
)
7289 /* Never disable a watchpoint scope breakpoint; we want to
7290 hit them when we leave scope so we can delete both the
7291 watchpoint and its scope breakpoint at that time. */
7292 if (bpt
->type
== bp_watchpoint_scope
)
7295 /* You can't disable permanent breakpoints. */
7296 if (bpt
->enable_state
== bp_permanent
)
7299 bpt
->enable_state
= bp_disabled
;
7301 check_duplicates (bpt
);
7303 if (modify_breakpoint_hook
)
7304 modify_breakpoint_hook (bpt
);
7305 breakpoint_modify_event (bpt
->number
);
7309 disable_command (char *args
, int from_tty
)
7311 struct breakpoint
*bpt
;
7313 ALL_BREAKPOINTS (bpt
)
7317 warning ("attempted to disable apparently deleted breakpoint #%d?",
7322 case bp_catch_unload
:
7324 case bp_catch_vfork
:
7326 case bp_catch_catch
:
7327 case bp_catch_throw
:
7328 case bp_hardware_breakpoint
:
7330 case bp_hardware_watchpoint
:
7331 case bp_read_watchpoint
:
7332 case bp_access_watchpoint
:
7333 disable_breakpoint (bpt
);
7338 map_breakpoint_numbers (args
, disable_breakpoint
);
7342 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7344 struct frame_info
*save_selected_frame
= NULL
;
7345 int save_selected_frame_level
= -1;
7346 int target_resources_ok
, other_type_used
;
7349 if (bpt
->type
== bp_hardware_breakpoint
)
7352 i
= hw_breakpoint_used_count ();
7353 target_resources_ok
=
7354 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7356 if (target_resources_ok
== 0)
7357 error ("No hardware breakpoint support in the target.");
7358 else if (target_resources_ok
< 0)
7359 error ("Hardware breakpoints used exceeds limit.");
7362 if (bpt
->enable_state
!= bp_permanent
)
7363 bpt
->enable_state
= bp_enabled
;
7364 bpt
->disposition
= disposition
;
7365 check_duplicates (bpt
);
7366 breakpoints_changed ();
7368 if (bpt
->type
== bp_watchpoint
||
7369 bpt
->type
== bp_hardware_watchpoint
||
7370 bpt
->type
== bp_read_watchpoint
||
7371 bpt
->type
== bp_access_watchpoint
)
7373 if (bpt
->exp_valid_block
!= NULL
)
7375 struct frame_info
*fr
=
7376 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7380 Cannot enable watchpoint %d because the block in which its expression\n\
7381 is valid is not currently in scope.\n", bpt
->number
);
7382 bpt
->enable_state
= bp_disabled
;
7386 save_selected_frame
= deprecated_selected_frame
;
7387 save_selected_frame_level
= frame_relative_level (deprecated_selected_frame
);
7391 value_free (bpt
->val
);
7392 mark
= value_mark ();
7393 bpt
->val
= evaluate_expression (bpt
->exp
);
7394 release_value (bpt
->val
);
7395 if (VALUE_LAZY (bpt
->val
))
7396 value_fetch_lazy (bpt
->val
);
7398 if (bpt
->type
== bp_hardware_watchpoint
||
7399 bpt
->type
== bp_read_watchpoint
||
7400 bpt
->type
== bp_access_watchpoint
)
7402 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7403 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7405 /* Hack around 'unused var' error for some targets here */
7407 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7408 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7409 /* we can consider of type is bp_hardware_watchpoint, convert to
7410 bp_watchpoint in the following condition */
7411 if (target_resources_ok
< 0)
7414 Cannot enable watchpoint %d because target watch resources\n\
7415 have been allocated for other watchpoints.\n", bpt
->number
);
7416 bpt
->enable_state
= bp_disabled
;
7417 value_free_to_mark (mark
);
7422 if (save_selected_frame_level
>= 0)
7423 select_frame (save_selected_frame
);
7424 value_free_to_mark (mark
);
7426 if (modify_breakpoint_hook
)
7427 modify_breakpoint_hook (bpt
);
7428 breakpoint_modify_event (bpt
->number
);
7432 enable_breakpoint (struct breakpoint
*bpt
)
7434 do_enable_breakpoint (bpt
, bpt
->disposition
);
7437 /* The enable command enables the specified breakpoints (or all defined
7438 breakpoints) so they once again become (or continue to be) effective
7439 in stopping the inferior. */
7442 enable_command (char *args
, int from_tty
)
7444 struct breakpoint
*bpt
;
7446 ALL_BREAKPOINTS (bpt
)
7450 warning ("attempted to enable apparently deleted breakpoint #%d?",
7455 case bp_catch_unload
:
7457 case bp_catch_vfork
:
7459 case bp_catch_catch
:
7460 case bp_catch_throw
:
7461 case bp_hardware_breakpoint
:
7463 case bp_hardware_watchpoint
:
7464 case bp_read_watchpoint
:
7465 case bp_access_watchpoint
:
7466 enable_breakpoint (bpt
);
7471 map_breakpoint_numbers (args
, enable_breakpoint
);
7475 enable_once_breakpoint (struct breakpoint
*bpt
)
7477 do_enable_breakpoint (bpt
, disp_disable
);
7481 enable_once_command (char *args
, int from_tty
)
7483 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7487 enable_delete_breakpoint (struct breakpoint
*bpt
)
7489 do_enable_breakpoint (bpt
, disp_del
);
7493 enable_delete_command (char *args
, int from_tty
)
7495 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7498 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7500 struct symtabs_and_lines
7501 decode_line_spec_1 (char *string
, int funfirstline
)
7503 struct symtabs_and_lines sals
;
7505 error ("Empty line specification.");
7506 if (default_breakpoint_valid
)
7507 sals
= decode_line_1 (&string
, funfirstline
,
7508 default_breakpoint_symtab
,
7509 default_breakpoint_line
,
7512 sals
= decode_line_1 (&string
, funfirstline
,
7513 (struct symtab
*) NULL
, 0, (char ***) NULL
);
7515 error ("Junk at end of line specification: %s", string
);
7520 _initialize_breakpoint (void)
7522 struct cmd_list_element
*c
;
7524 breakpoint_chain
= 0;
7525 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7526 before a breakpoint is set. */
7527 breakpoint_count
= 0;
7529 add_com ("ignore", class_breakpoint
, ignore_command
,
7530 "Set ignore-count of breakpoint number N to COUNT.\n\
7531 Usage is `ignore N COUNT'.");
7533 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
7535 add_com ("commands", class_breakpoint
, commands_command
,
7536 "Set commands to be executed when a breakpoint is hit.\n\
7537 Give breakpoint number as argument after \"commands\".\n\
7538 With no argument, the targeted breakpoint is the last one set.\n\
7539 The commands themselves follow starting on the next line.\n\
7540 Type a line containing \"end\" to indicate the end of them.\n\
7541 Give \"silent\" as the first line to make the breakpoint silent;\n\
7542 then no output is printed when it is hit, except what the commands print.");
7544 add_com ("condition", class_breakpoint
, condition_command
,
7545 "Specify breakpoint number N to break only if COND is true.\n\
7546 Usage is `condition N COND', where N is an integer and COND is an\n\
7547 expression to be evaluated whenever breakpoint N is reached.");
7549 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
,
7550 "Set a temporary breakpoint. Args like \"break\" command.\n\
7551 Like \"break\" except the breakpoint is only temporary,\n\
7552 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7553 by using \"enable delete\" on the breakpoint number.");
7554 set_cmd_completer (c
, location_completer
);
7556 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
,
7557 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7558 Like \"break\" except the breakpoint requires hardware support,\n\
7559 some target hardware may not have this support.");
7560 set_cmd_completer (c
, location_completer
);
7562 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
,
7563 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7564 Like \"hbreak\" except the breakpoint is only temporary,\n\
7565 so it will be deleted when hit.");
7566 set_cmd_completer (c
, location_completer
);
7568 add_prefix_cmd ("enable", class_breakpoint
, enable_command
,
7569 "Enable some breakpoints.\n\
7570 Give breakpoint numbers (separated by spaces) as arguments.\n\
7571 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7572 This is used to cancel the effect of the \"disable\" command.\n\
7573 With a subcommand you can enable temporarily.",
7574 &enablelist
, "enable ", 1, &cmdlist
);
7576 add_com ("ab", class_breakpoint
, enable_command
,
7577 "Enable some breakpoints.\n\
7578 Give breakpoint numbers (separated by spaces) as arguments.\n\
7579 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7580 This is used to cancel the effect of the \"disable\" command.\n\
7581 With a subcommand you can enable temporarily.");
7583 add_com_alias ("en", "enable", class_breakpoint
, 1);
7585 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
,
7586 "Enable some breakpoints.\n\
7587 Give breakpoint numbers (separated by spaces) as arguments.\n\
7588 This is used to cancel the effect of the \"disable\" command.\n\
7589 May be abbreviated to simply \"enable\".\n",
7590 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
7592 add_cmd ("once", no_class
, enable_once_command
,
7593 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7594 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7597 add_cmd ("delete", no_class
, enable_delete_command
,
7598 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7599 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7602 add_cmd ("delete", no_class
, enable_delete_command
,
7603 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7604 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7607 add_cmd ("once", no_class
, enable_once_command
,
7608 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7609 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7612 add_prefix_cmd ("disable", class_breakpoint
, disable_command
,
7613 "Disable some breakpoints.\n\
7614 Arguments are breakpoint numbers with spaces in between.\n\
7615 To disable all breakpoints, give no argument.\n\
7616 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7617 &disablelist
, "disable ", 1, &cmdlist
);
7618 add_com_alias ("dis", "disable", class_breakpoint
, 1);
7619 add_com_alias ("disa", "disable", class_breakpoint
, 1);
7621 add_com ("sb", class_breakpoint
, disable_command
,
7622 "Disable some breakpoints.\n\
7623 Arguments are breakpoint numbers with spaces in between.\n\
7624 To disable all breakpoints, give no argument.\n\
7625 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7627 add_cmd ("breakpoints", class_alias
, disable_command
,
7628 "Disable some breakpoints.\n\
7629 Arguments are breakpoint numbers with spaces in between.\n\
7630 To disable all breakpoints, give no argument.\n\
7631 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7632 This command may be abbreviated \"disable\".",
7635 add_prefix_cmd ("delete", class_breakpoint
, delete_command
,
7636 "Delete some breakpoints or auto-display expressions.\n\
7637 Arguments are breakpoint numbers with spaces in between.\n\
7638 To delete all breakpoints, give no argument.\n\
7640 Also a prefix command for deletion of other GDB objects.\n\
7641 The \"unset\" command is also an alias for \"delete\".",
7642 &deletelist
, "delete ", 1, &cmdlist
);
7643 add_com_alias ("d", "delete", class_breakpoint
, 1);
7645 add_com ("db", class_breakpoint
, delete_command
,
7646 "Delete some breakpoints.\n\
7647 Arguments are breakpoint numbers with spaces in between.\n\
7648 To delete all breakpoints, give no argument.\n");
7650 add_cmd ("breakpoints", class_alias
, delete_command
,
7651 "Delete some breakpoints or auto-display expressions.\n\
7652 Arguments are breakpoint numbers with spaces in between.\n\
7653 To delete all breakpoints, give no argument.\n\
7654 This command may be abbreviated \"delete\".",
7657 add_com ("clear", class_breakpoint
, clear_command
,
7658 concat ("Clear breakpoint at specified line or function.\n\
7659 Argument may be line number, function name, or \"*\" and an address.\n\
7660 If line number is specified, all breakpoints in that line are cleared.\n\
7661 If function is specified, breakpoints at beginning of function are cleared.\n\
7662 If an address is specified, breakpoints at that address are cleared.\n\n",
7663 "With no argument, clears all breakpoints in the line that the selected frame\n\
7666 See also the \"delete\" command which clears breakpoints by number.", NULL
));
7668 c
= add_com ("break", class_breakpoint
, break_command
,
7669 concat ("Set breakpoint at specified line or function.\n\
7670 Argument may be line number, function name, or \"*\" and an address.\n\
7671 If line number is specified, break at start of code for that line.\n\
7672 If function is specified, break at start of code for that function.\n\
7673 If an address is specified, break at that exact address.\n",
7674 "With no arg, uses current execution address of selected stack frame.\n\
7675 This is useful for breaking on return to a stack frame.\n\
7677 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7679 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL
));
7680 set_cmd_completer (c
, location_completer
);
7682 add_com_alias ("b", "break", class_run
, 1);
7683 add_com_alias ("br", "break", class_run
, 1);
7684 add_com_alias ("bre", "break", class_run
, 1);
7685 add_com_alias ("brea", "break", class_run
, 1);
7689 add_com_alias ("ba", "break", class_breakpoint
, 1);
7690 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
7695 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
,
7696 "Break in function/address or break at a line in the current file.",
7697 &stoplist
, "stop ", 1, &cmdlist
);
7698 add_cmd ("in", class_breakpoint
, stopin_command
,
7699 "Break in function or address.\n", &stoplist
);
7700 add_cmd ("at", class_breakpoint
, stopat_command
,
7701 "Break at a line in the current file.\n", &stoplist
);
7702 add_com ("status", class_info
, breakpoints_info
,
7703 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7704 The \"Type\" column indicates one of:\n\
7705 \tbreakpoint - normal breakpoint\n\
7706 \twatchpoint - watchpoint\n\
7707 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7708 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7709 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7710 address and file/line number respectively.\n\n",
7711 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7712 are set to the address of the last breakpoint listed.\n\n\
7713 Convenience variable \"$bpnum\" contains the number of the last\n\
7714 breakpoint set.", NULL
));
7717 add_info ("breakpoints", breakpoints_info
,
7718 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7719 The \"Type\" column indicates one of:\n\
7720 \tbreakpoint - normal breakpoint\n\
7721 \twatchpoint - watchpoint\n\
7722 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7723 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7724 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7725 address and file/line number respectively.\n\n",
7726 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7727 are set to the address of the last breakpoint listed.\n\n\
7728 Convenience variable \"$bpnum\" contains the number of the last\n\
7729 breakpoint set.", NULL
));
7732 add_com ("lb", class_breakpoint
, breakpoints_info
,
7733 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7734 The \"Type\" column indicates one of:\n\
7735 \tbreakpoint - normal breakpoint\n\
7736 \twatchpoint - watchpoint\n\
7737 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7738 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7739 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7740 address and file/line number respectively.\n\n",
7741 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7742 are set to the address of the last breakpoint listed.\n\n\
7743 Convenience variable \"$bpnum\" contains the number of the last\n\
7744 breakpoint set.", NULL
));
7746 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
,
7747 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7748 The \"Type\" column indicates one of:\n\
7749 \tbreakpoint - normal breakpoint\n\
7750 \twatchpoint - watchpoint\n\
7751 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7752 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7753 \tuntil - internal breakpoint used by the \"until\" command\n\
7754 \tfinish - internal breakpoint used by the \"finish\" command\n",
7755 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7756 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7757 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7758 address and file/line number respectively.\n\n",
7759 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7760 are set to the address of the last breakpoint listed.\n\n\
7761 Convenience variable \"$bpnum\" contains the number of the last\n\
7762 breakpoint set.", NULL
),
7763 &maintenanceinfolist
);
7765 add_com ("catch", class_breakpoint
, catch_command
,
7766 "Set catchpoints to catch events.\n\
7767 Raised signals may be caught:\n\
7768 \tcatch signal - all signals\n\
7769 \tcatch signal <signame> - a particular signal\n\
7770 Raised exceptions may be caught:\n\
7771 \tcatch throw - all exceptions, when thrown\n\
7772 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7773 \tcatch catch - all exceptions, when caught\n\
7774 \tcatch catch <exceptname> - a particular exception, when caught\n\
7775 Thread or process events may be caught:\n\
7776 \tcatch thread_start - any threads, just after creation\n\
7777 \tcatch thread_exit - any threads, just before expiration\n\
7778 \tcatch thread_join - any threads, just after joins\n\
7779 Process events may be caught:\n\
7780 \tcatch start - any processes, just after creation\n\
7781 \tcatch exit - any processes, just before expiration\n\
7782 \tcatch fork - calls to fork()\n\
7783 \tcatch vfork - calls to vfork()\n\
7784 \tcatch exec - calls to exec()\n\
7785 Dynamically-linked library events may be caught:\n\
7786 \tcatch load - loads of any library\n\
7787 \tcatch load <libname> - loads of a particular library\n\
7788 \tcatch unload - unloads of any library\n\
7789 \tcatch unload <libname> - unloads of a particular library\n\
7790 The act of your program's execution stopping may also be caught:\n\
7792 C++ exceptions may be caught:\n\
7793 \tcatch throw - all exceptions, when thrown\n\
7794 \tcatch catch - all exceptions, when caught\n\
7796 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7797 after a fork or vfork is caught.\n\n\
7798 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7800 add_com ("tcatch", class_breakpoint
, tcatch_command
,
7801 "Set temporary catchpoints to catch events.\n\
7802 Args like \"catch\" command.\n\
7803 Like \"catch\" except the catchpoint is only temporary,\n\
7804 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7805 by using \"enable delete\" on the catchpoint number.");
7807 c
= add_com ("watch", class_breakpoint
, watch_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 changes.");
7811 set_cmd_completer (c
, location_completer
);
7813 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
,
7814 "Set a read watchpoint for an expression.\n\
7815 A watchpoint stops execution of your program whenever the value of\n\
7816 an expression is read.");
7817 set_cmd_completer (c
, location_completer
);
7819 c
= add_com ("awatch", class_breakpoint
, awatch_command
,
7820 "Set a watchpoint for an expression.\n\
7821 A watchpoint stops execution of your program whenever the value of\n\
7822 an expression is either read or written.");
7823 set_cmd_completer (c
, location_completer
);
7825 add_info ("watchpoints", breakpoints_info
,
7826 "Synonym for ``info breakpoints''.");
7829 c
= add_set_cmd ("can-use-hw-watchpoints", class_support
, var_zinteger
,
7830 (char *) &can_use_hw_watchpoints
,
7831 "Set debugger's willingness to use watchpoint hardware.\n\
7832 If zero, gdb will not use hardware for new watchpoints, even if\n\
7833 such is available. (However, any hardware watchpoints that were\n\
7834 created before setting this to nonzero, will continue to use watchpoint\n\
7837 add_show_from_set (c
, &showlist
);
7839 can_use_hw_watchpoints
= 1;