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 /* Return whether a breakpoint is an active enabled breakpoint. */
337 breakpoint_enabled (struct breakpoint
*b
)
339 return b
->enable_state
== bp_enabled
;
342 /* Set breakpoint count to NUM. */
345 set_breakpoint_count (int num
)
347 breakpoint_count
= num
;
348 set_internalvar (lookup_internalvar ("bpnum"),
349 value_from_longest (builtin_type_int
, (LONGEST
) num
));
352 /* Used in run_command to zero the hit count when a new run starts. */
355 clear_breakpoint_hit_counts (void)
357 struct breakpoint
*b
;
363 /* Default address, symtab and line to put a breakpoint at
364 for "break" command with no arg.
365 if default_breakpoint_valid is zero, the other three are
366 not valid, and "break" with no arg is an error.
368 This set by print_stack_frame, which calls set_default_breakpoint. */
370 int default_breakpoint_valid
;
371 CORE_ADDR default_breakpoint_address
;
372 struct symtab
*default_breakpoint_symtab
;
373 int default_breakpoint_line
;
375 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
376 Advance *PP after the string and any trailing whitespace.
378 Currently the string can either be a number or "$" followed by the name
379 of a convenience variable. Making it an expression wouldn't work well
380 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
382 TRAILER is a character which can be found after the number; most
383 commonly this is `-'. If you don't want a trailer, use \0. */
385 get_number_trailer (char **pp
, int trailer
)
387 int retval
= 0; /* default */
391 /* Empty line means refer to the last breakpoint. */
392 return breakpoint_count
;
395 /* Make a copy of the name, so we can null-terminate it
396 to pass to lookup_internalvar(). */
401 while (isalnum (*p
) || *p
== '_')
403 varname
= (char *) alloca (p
- start
+ 1);
404 strncpy (varname
, start
, p
- start
);
405 varname
[p
- start
] = '\0';
406 val
= value_of_internalvar (lookup_internalvar (varname
));
407 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_INT
)
408 retval
= (int) value_as_long (val
);
411 printf_filtered ("Convenience variable must have integer value.\n");
419 while (*p
>= '0' && *p
<= '9')
422 /* There is no number here. (e.g. "cond a == b"). */
424 /* Skip non-numeric token */
425 while (*p
&& !isspace((int) *p
))
427 /* Return zero, which caller must interpret as error. */
433 if (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
435 /* Trailing junk: return 0 and let caller print error msg. */
436 while (!(isspace (*p
) || *p
== '\0' || *p
== trailer
))
447 /* Like get_number_trailer, but don't allow a trailer. */
449 get_number (char **pp
)
451 return get_number_trailer (pp
, '\0');
454 /* Parse a number or a range.
455 * A number will be of the form handled by get_number.
456 * A range will be of the form <number1> - <number2>, and
457 * will represent all the integers between number1 and number2,
460 * While processing a range, this fuction is called iteratively;
461 * At each call it will return the next value in the range.
463 * At the beginning of parsing a range, the char pointer PP will
464 * be advanced past <number1> and left pointing at the '-' token.
465 * Subsequent calls will not advance the pointer until the range
466 * is completed. The call that completes the range will advance
467 * pointer PP past <number2>.
471 get_number_or_range (char **pp
)
473 static int last_retval
, end_value
;
474 static char *end_ptr
;
475 static int in_range
= 0;
479 /* Default case: pp is pointing either to a solo number,
480 or to the first number of a range. */
481 last_retval
= get_number_trailer (pp
, '-');
486 /* This is the start of a range (<number1> - <number2>).
487 Skip the '-', parse and remember the second number,
488 and also remember the end of the final token. */
492 while (isspace ((int) *end_ptr
))
493 end_ptr
++; /* skip white space */
494 end_value
= get_number (temp
);
495 if (end_value
< last_retval
)
497 error ("inverted range");
499 else if (end_value
== last_retval
)
501 /* degenerate range (number1 == number2). Advance the
502 token pointer so that the range will be treated as a
511 error ("negative value");
514 /* pp points to the '-' that betokens a range. All
515 number-parsing has already been done. Return the next
516 integer value (one greater than the saved previous value).
517 Do not advance the token pointer 'pp' until the end of range
520 if (++last_retval
== end_value
)
522 /* End of range reached; advance token pointer. */
532 /* condition N EXP -- set break condition of breakpoint N to EXP. */
535 condition_command (char *arg
, int from_tty
)
537 struct breakpoint
*b
;
542 error_no_arg ("breakpoint number");
545 bnum
= get_number (&p
);
547 error ("Bad breakpoint argument: '%s'", arg
);
550 if (b
->number
== bnum
)
557 if (b
->cond_string
!= NULL
)
558 xfree (b
->cond_string
);
563 b
->cond_string
= NULL
;
565 printf_filtered ("Breakpoint %d now unconditional.\n", bnum
);
570 /* I don't know if it matters whether this is the string the user
571 typed in or the decompiled expression. */
572 b
->cond_string
= savestring (arg
, strlen (arg
));
573 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->loc
->address
), 0);
575 error ("Junk at end of expression");
577 breakpoints_changed ();
578 breakpoint_modify_event (b
->number
);
582 error ("No breakpoint number %d.", bnum
);
586 commands_command (char *arg
, int from_tty
)
588 struct breakpoint
*b
;
591 struct command_line
*l
;
593 /* If we allowed this, we would have problems with when to
594 free the storage, if we change the commands currently
597 if (executing_breakpoint_commands
)
598 error ("Can't use the \"commands\" command among a breakpoint's commands.");
601 bnum
= get_number (&p
);
604 error ("Unexpected extra arguments following breakpoint number.");
607 if (b
->number
== bnum
)
609 char *tmpbuf
= xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
611 struct cleanup
*cleanups
= make_cleanup (xfree
, tmpbuf
);
612 l
= read_command_lines (tmpbuf
, from_tty
);
613 do_cleanups (cleanups
);
614 free_command_lines (&b
->commands
);
616 breakpoints_changed ();
617 breakpoint_modify_event (b
->number
);
620 error ("No breakpoint number %d.", bnum
);
623 /* Like target_read_memory() but if breakpoints are inserted, return
624 the shadow contents instead of the breakpoints themselves.
626 Read "memory data" from whatever target or inferior we have.
627 Returns zero if successful, errno value if not. EIO is used
628 for address out of bounds. If breakpoints are inserted, returns
629 shadow contents, not the breakpoints themselves. From breakpoint.c. */
632 read_memory_nobpt (CORE_ADDR memaddr
, char *myaddr
, unsigned len
)
635 struct bp_location
*b
;
636 CORE_ADDR bp_addr
= 0;
639 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
640 /* No breakpoints on this machine. */
641 return target_read_memory (memaddr
, myaddr
, len
);
645 if (b
->owner
->type
== bp_none
)
646 warning ("reading through apparently deleted breakpoint #%d?",
649 if (b
->loc_type
!= bp_loc_software_breakpoint
)
653 /* Addresses and length of the part of the breakpoint that
655 /* XXXX The m68k, sh and h8300 have different local and remote
656 breakpoint values. BREAKPOINT_FROM_PC still manages to
657 correctly determine the breakpoints memory address and size
658 for these targets. */
659 bp_addr
= b
->address
;
661 if (BREAKPOINT_FROM_PC (&bp_addr
, &bp_size
) == NULL
)
666 if (bp_addr
+ bp_size
<= memaddr
)
667 /* The breakpoint is entirely before the chunk of memory we
670 if (bp_addr
>= memaddr
+ len
)
671 /* The breakpoint is entirely after the chunk of memory we are
674 /* Copy the breakpoint from the shadow contents, and recurse for
675 the things before and after. */
677 /* Offset within shadow_contents. */
680 if (bp_addr
< memaddr
)
682 /* Only copy the second part of the breakpoint. */
683 bp_size
-= memaddr
- bp_addr
;
684 bptoffset
= memaddr
- bp_addr
;
688 if (bp_addr
+ bp_size
> memaddr
+ len
)
690 /* Only copy the first part of the breakpoint. */
691 bp_size
-= (bp_addr
+ bp_size
) - (memaddr
+ len
);
694 memcpy (myaddr
+ bp_addr
- memaddr
,
695 b
->shadow_contents
+ bptoffset
, bp_size
);
697 if (bp_addr
> memaddr
)
699 /* Copy the section of memory before the breakpoint. */
700 status
= read_memory_nobpt (memaddr
, myaddr
, bp_addr
- memaddr
);
705 if (bp_addr
+ bp_size
< memaddr
+ len
)
707 /* Copy the section of memory after the breakpoint. */
708 status
= read_memory_nobpt (bp_addr
+ bp_size
,
709 myaddr
+ bp_addr
+ bp_size
- memaddr
,
710 memaddr
+ len
- (bp_addr
+ bp_size
));
717 /* Nothing overlaps. Just call read_memory_noerr. */
718 return target_read_memory (memaddr
, myaddr
, len
);
722 /* A wrapper function for inserting catchpoints. */
724 insert_catchpoint (struct ui_out
*uo
, void *args
)
726 struct breakpoint
*b
= (struct breakpoint
*) args
;
732 val
= target_insert_fork_catchpoint (PIDGET (inferior_ptid
));
735 val
= target_insert_vfork_catchpoint (PIDGET (inferior_ptid
));
738 val
= target_insert_exec_catchpoint (PIDGET (inferior_ptid
));
741 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
746 throw_exception (RETURN_ERROR
);
751 /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint.
752 Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS,
753 PROCESS_WARNING, and HW_BREAKPOINT_ERROR are used to report problems.
755 NOTE drow/2003-09-09: This routine could be broken down to an object-style
756 method for each breakpoint or catchpoint type. */
758 insert_bp_location (struct bp_location
*bpt
,
759 struct ui_file
*tmp_error_stream
,
760 int *disabled_breaks
, int *process_warning
,
761 int *hw_breakpoint_error
)
765 /* Permanent breakpoints cannot be inserted or removed. Disabled
766 breakpoints should not be inserted. */
767 if (!breakpoint_enabled (bpt
->owner
))
770 if (bpt
->inserted
|| bpt
->duplicate
)
773 if (bpt
->loc_type
== bp_loc_software_breakpoint
774 || bpt
->loc_type
== bp_loc_hardware_breakpoint
)
776 /* First check to see if we have to handle an overlay. */
777 if (overlay_debugging
== ovly_off
778 || bpt
->section
== NULL
779 || !(section_is_overlay (bpt
->section
)))
781 /* No overlay handling: just set the breakpoint. */
783 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
784 val
= target_insert_hw_breakpoint (bpt
->address
,
785 bpt
->shadow_contents
);
787 val
= target_insert_breakpoint (bpt
->address
,
788 bpt
->shadow_contents
);
792 /* This breakpoint is in an overlay section.
793 Shall we set a breakpoint at the LMA? */
794 if (!overlay_events_enabled
)
796 /* Yes -- overlay event support is not active,
797 so we must try to set a breakpoint at the LMA.
798 This will not work for a hardware breakpoint. */
799 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
800 warning ("hardware breakpoint %d not supported in overlay!\n",
804 CORE_ADDR addr
= overlay_unmapped_address (bpt
->address
,
806 /* Set a software (trap) breakpoint at the LMA. */
807 val
= target_insert_breakpoint (addr
, bpt
->shadow_contents
);
809 fprintf_unfiltered (tmp_error_stream
,
810 "Overlay breakpoint %d failed: in ROM?",
814 /* Shall we set a breakpoint at the VMA? */
815 if (section_is_mapped (bpt
->section
))
817 /* Yes. This overlay section is mapped into memory. */
818 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
819 val
= target_insert_hw_breakpoint (bpt
->address
,
820 bpt
->shadow_contents
);
822 val
= target_insert_breakpoint (bpt
->address
,
823 bpt
->shadow_contents
);
827 /* No. This breakpoint will not be inserted.
828 No error, but do not mark the bp as 'inserted'. */
835 /* Can't set the breakpoint. */
836 #if defined (DISABLE_UNSETTABLE_BREAK)
837 if (DISABLE_UNSETTABLE_BREAK (bpt
->address
))
839 /* See also: disable_breakpoints_in_shlibs. */
841 bpt
->owner
->enable_state
= bp_shlib_disabled
;
842 if (!*disabled_breaks
)
844 fprintf_unfiltered (tmp_error_stream
,
845 "Cannot insert breakpoint %d.\n",
847 fprintf_unfiltered (tmp_error_stream
,
848 "Temporarily disabling shared library breakpoints:\n");
850 *disabled_breaks
= 1;
851 fprintf_unfiltered (tmp_error_stream
,
852 "breakpoint #%d\n", bpt
->owner
->number
);
857 #ifdef ONE_PROCESS_WRITETEXT
858 *process_warning
= 1;
860 if (bpt
->loc_type
== bp_loc_hardware_breakpoint
)
862 *hw_breakpoint_error
= 1;
863 fprintf_unfiltered (tmp_error_stream
,
864 "Cannot insert hardware breakpoint %d.\n",
869 fprintf_unfiltered (tmp_error_stream
,
870 "Cannot insert breakpoint %d.\n",
872 fprintf_filtered (tmp_error_stream
,
873 "Error accessing memory address ");
874 print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
875 fprintf_filtered (tmp_error_stream
, ": %s.\n",
876 safe_strerror (val
));
887 else if (bpt
->loc_type
== bp_loc_hardware_watchpoint
888 /* NOTE drow/2003-09-08: This state only exists for removing
889 watchpoints. It's not clear that it's necessary... */
890 && bpt
->owner
->disposition
!= disp_del_at_next_stop
)
892 /* FIXME drow/2003-09-08: This code sets multiple hardware watchpoints
893 based on the expression. Ideally this should happen at a higher level,
894 and there should be one bp_location for each computed address we
895 must watch. As soon as a many-to-one mapping is available I'll
898 struct frame_info
*saved_frame
;
899 int saved_level
, within_current_scope
;
900 struct value
*mark
= value_mark ();
903 /* Save the current frame and level so we can restore it after
904 evaluating the watchpoint expression on its own frame. */
905 /* FIXME drow/2003-09-09: It would be nice if evaluate_expression
906 took a frame parameter, so that we didn't have to change the
908 saved_frame
= deprecated_selected_frame
;
909 saved_level
= frame_relative_level (deprecated_selected_frame
);
911 /* Determine if the watchpoint is within scope. */
912 if (bpt
->owner
->exp_valid_block
== NULL
)
913 within_current_scope
= 1;
916 struct frame_info
*fi
;
917 fi
= frame_find_by_id (bpt
->owner
->watchpoint_frame
);
918 within_current_scope
= (fi
!= NULL
);
919 if (within_current_scope
)
923 if (within_current_scope
)
925 /* Evaluate the expression and cut the chain of values
926 produced off from the value chain.
928 Make sure the value returned isn't lazy; we use
929 laziness to determine what memory GDB actually needed
930 in order to compute the value of the expression. */
931 v
= evaluate_expression (bpt
->owner
->exp
);
933 value_release_to_mark (mark
);
935 bpt
->owner
->val_chain
= v
;
938 /* Look at each value on the value chain. */
939 for (; v
; v
= v
->next
)
941 /* If it's a memory location, and GDB actually needed
942 its contents to evaluate the expression, then we
944 if (VALUE_LVAL (v
) == lval_memory
947 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
949 /* We only watch structs and arrays if user asked
950 for it explicitly, never if they just happen to
951 appear in the middle of some value chain. */
952 if (v
== bpt
->owner
->val_chain
953 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
954 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
959 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
960 len
= TYPE_LENGTH (VALUE_TYPE (v
));
962 if (bpt
->owner
->type
== bp_read_watchpoint
)
964 else if (bpt
->owner
->type
== bp_access_watchpoint
)
967 val
= target_insert_watchpoint (addr
, len
, type
);
970 /* Don't exit the loop, try to insert
971 every value on the value chain. That's
972 because we will be removing all the
973 watches below, and removing a
974 watchpoint we didn't insert could have
982 /* Failure to insert a watchpoint on any memory value in the
983 value chain brings us here. */
986 remove_breakpoint (bpt
, mark_uninserted
);
987 *hw_breakpoint_error
= 1;
988 fprintf_unfiltered (tmp_error_stream
,
989 "Could not insert hardware watchpoint %d.\n",
996 printf_filtered ("Hardware watchpoint %d deleted ", bpt
->owner
->number
);
997 printf_filtered ("because the program has left the block \n");
998 printf_filtered ("in which its expression is valid.\n");
999 if (bpt
->owner
->related_breakpoint
)
1000 bpt
->owner
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
1001 bpt
->owner
->disposition
= disp_del_at_next_stop
;
1004 /* Restore the frame and level. */
1005 if (saved_frame
!= deprecated_selected_frame
1006 || saved_level
!= frame_relative_level (deprecated_selected_frame
))
1007 select_frame (saved_frame
);
1012 else if (ep_is_exception_catchpoint (bpt
->owner
))
1014 /* FIXME drow/2003-09-09: This code sets both a catchpoint and a
1015 breakpoint. Once again, it would be better if this was represented
1016 as two bp_locations. */
1018 /* If we get here, we must have a callback mechanism for exception
1019 events -- with g++ style embedded label support, we insert
1020 ordinary breakpoints and not catchpoints. */
1021 val
= target_insert_breakpoint (bpt
->address
, bpt
->shadow_contents
);
1024 /* Couldn't set breakpoint for some reason */
1025 fprintf_unfiltered (tmp_error_stream
,
1026 "Cannot insert catchpoint %d; disabling it.\n",
1027 bpt
->owner
->number
);
1028 fprintf_filtered (tmp_error_stream
,
1029 "Error accessing memory address ");
1030 print_address_numeric (bpt
->address
, 1, tmp_error_stream
);
1031 fprintf_filtered (tmp_error_stream
, ": %s.\n",
1032 safe_strerror (val
));
1033 bpt
->owner
->enable_state
= bp_disabled
;
1037 /* Bp set, now make sure callbacks are enabled */
1038 /* Format possible error msg */
1039 char *message
= xstrprintf ("Error inserting catchpoint %d:\n",
1040 bpt
->owner
->number
);
1041 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
1043 args_for_catchpoint_enable args
;
1044 args
.kind
= bpt
->owner
->type
== bp_catch_catch
?
1045 EX_EVENT_CATCH
: EX_EVENT_THROW
;
1047 val
= catch_errors (cover_target_enable_exception_callback
,
1048 &args
, message
, RETURN_MASK_ALL
);
1049 do_cleanups (cleanups
);
1050 if (val
!= 0 && val
!= -1)
1053 /* Check if something went wrong; val == 0 can be ignored */
1056 /* something went wrong */
1057 fprintf_unfiltered (tmp_error_stream
,
1058 "Cannot insert catchpoint %d; disabling it.\n",
1059 bpt
->owner
->number
);
1060 bpt
->owner
->enable_state
= bp_disabled
;
1067 else if (bpt
->owner
->type
== bp_catch_fork
1068 || bpt
->owner
->type
== bp_catch_vfork
1069 || bpt
->owner
->type
== bp_catch_exec
)
1071 char *prefix
= xstrprintf ("warning: inserting catchpoint %d: ",
1072 bpt
->owner
->number
);
1073 struct cleanup
*cleanups
= make_cleanup (xfree
, prefix
);
1074 val
= catch_exceptions (uiout
, insert_catchpoint
, bpt
->owner
, prefix
,
1076 do_cleanups (cleanups
);
1078 bpt
->owner
->enable_state
= bp_disabled
;
1082 /* We've already printed an error message if there was a problem
1083 inserting this catchpoint, and we've disabled the catchpoint,
1084 so just return success. */
1091 /* insert_breakpoints is used when starting or continuing the program.
1092 remove_breakpoints is used when the program stops.
1093 Both return zero if successful,
1094 or an `errno' value if could not write the inferior. */
1097 insert_breakpoints (void)
1099 struct bp_location
*b
, *temp
;
1100 int return_val
= 0; /* return success code. */
1102 int disabled_breaks
= 0;
1103 int hw_breakpoint_error
= 0;
1104 int process_warning
= 0;
1106 struct ui_file
*tmp_error_stream
= mem_fileopen ();
1107 make_cleanup_ui_file_delete (tmp_error_stream
);
1109 /* Explicitly mark the warning -- this will only be printed if
1110 there was an error. */
1111 fprintf_unfiltered (tmp_error_stream
, "Warning:\n");
1113 ALL_BP_LOCATIONS_SAFE (b
, temp
)
1115 /* Permanent breakpoints cannot be inserted or removed. Disabled
1116 breakpoints should not be inserted. */
1117 if (!breakpoint_enabled (b
->owner
))
1120 /* FIXME drow/2003-10-07: This code should be pushed elsewhere when
1121 hardware watchpoints are split into multiple loc breakpoints. */
1122 if ((b
->loc_type
== bp_loc_hardware_watchpoint
1123 || b
->owner
->type
== bp_watchpoint
) && !b
->owner
->val
)
1126 val
= evaluate_expression (b
->owner
->exp
);
1127 release_value (val
);
1128 if (VALUE_LAZY (val
))
1129 value_fetch_lazy (val
);
1130 b
->owner
->val
= val
;
1133 val
= insert_bp_location (b
, tmp_error_stream
,
1134 &disabled_breaks
, &process_warning
,
1135 &hw_breakpoint_error
);
1142 /* If a hardware breakpoint or watchpoint was inserted, add a
1143 message about possibly exhausted resources. */
1144 if (hw_breakpoint_error
)
1146 fprintf_unfiltered (tmp_error_stream
,
1147 "Could not insert hardware breakpoints:\n\
1148 You may have requested too many hardware breakpoints/watchpoints.\n");
1150 #ifdef ONE_PROCESS_WRITETEXT
1151 if (process_warning
)
1152 fprintf_unfiltered (tmp_error_stream
,
1153 "The same program may be running in another process.");
1155 target_terminal_ours_for_output ();
1156 error_stream (tmp_error_stream
);
1162 remove_breakpoints (void)
1164 struct bp_location
*b
;
1167 ALL_BP_LOCATIONS (b
)
1171 val
= remove_breakpoint (b
, mark_uninserted
);
1180 remove_hw_watchpoints (void)
1182 struct bp_location
*b
;
1185 ALL_BP_LOCATIONS (b
)
1187 if (b
->inserted
&& b
->loc_type
== bp_loc_hardware_watchpoint
)
1189 val
= remove_breakpoint (b
, mark_uninserted
);
1198 reattach_breakpoints (int pid
)
1200 struct bp_location
*b
;
1202 struct cleanup
*old_chain
= save_inferior_ptid ();
1204 /* Set inferior_ptid; remove_breakpoint uses this global. */
1205 inferior_ptid
= pid_to_ptid (pid
);
1206 ALL_BP_LOCATIONS (b
)
1210 remove_breakpoint (b
, mark_inserted
);
1211 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1212 val
= target_insert_hw_breakpoint (b
->address
, b
->shadow_contents
);
1214 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
1215 /* FIXME drow/2003-10-07: This doesn't handle any other kinds of
1216 breakpoints. It's wrong for watchpoints, for example. */
1219 do_cleanups (old_chain
);
1224 do_cleanups (old_chain
);
1229 update_breakpoints_after_exec (void)
1231 struct breakpoint
*b
;
1232 struct breakpoint
*temp
;
1234 /* Doing this first prevents the badness of having delete_breakpoint()
1235 write a breakpoint's current "shadow contents" to lift the bp. That
1236 shadow is NOT valid after an exec()! */
1237 mark_breakpoints_out ();
1239 ALL_BREAKPOINTS_SAFE (b
, temp
)
1241 /* Solib breakpoints must be explicitly reset after an exec(). */
1242 if (b
->type
== bp_shlib_event
)
1244 delete_breakpoint (b
);
1248 /* Thread event breakpoints must be set anew after an exec(),
1249 as must overlay event breakpoints. */
1250 if (b
->type
== bp_thread_event
|| b
->type
== bp_overlay_event
)
1252 delete_breakpoint (b
);
1256 /* Step-resume breakpoints are meaningless after an exec(). */
1257 if (b
->type
== bp_step_resume
)
1259 delete_breakpoint (b
);
1263 /* Ditto the sigtramp handler breakpoints. */
1264 if (b
->type
== bp_through_sigtramp
)
1266 delete_breakpoint (b
);
1270 /* Ditto the exception-handling catchpoints. */
1271 if ((b
->type
== bp_catch_catch
) || (b
->type
== bp_catch_throw
))
1273 delete_breakpoint (b
);
1277 /* Don't delete an exec catchpoint, because else the inferior
1278 won't stop when it ought!
1280 Similarly, we probably ought to keep vfork catchpoints, 'cause
1281 on this target, we may not be able to stop when the vfork is
1282 seen, but only when the subsequent exec is seen. (And because
1283 deleting fork catchpoints here but not vfork catchpoints will
1284 seem mysterious to users, keep those too.)
1286 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1287 target address field, if any, is sufficient to have it be reset
1288 automagically. Certainly on HP-UX that's true.
1290 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1291 valid code address on some platforms (like the mn10300
1292 simulators). We shouldn't assign any special interpretation to
1293 a breakpoint with a zero address. And in fact, GDB doesn't ---
1294 I can't see what that comment above is talking about. As far
1295 as I can tell, setting the address of a
1296 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1297 is meaningless, since those are implemented with HP-UX kernel
1298 hackery, not by storing breakpoint instructions somewhere. */
1299 if ((b
->type
== bp_catch_exec
) ||
1300 (b
->type
== bp_catch_vfork
) ||
1301 (b
->type
== bp_catch_fork
))
1303 b
->loc
->address
= (CORE_ADDR
) NULL
;
1307 /* bp_finish is a special case. The only way we ought to be able
1308 to see one of these when an exec() has happened, is if the user
1309 caught a vfork, and then said "finish". Ordinarily a finish just
1310 carries them to the call-site of the current callee, by setting
1311 a temporary bp there and resuming. But in this case, the finish
1312 will carry them entirely through the vfork & exec.
1314 We don't want to allow a bp_finish to remain inserted now. But
1315 we can't safely delete it, 'cause finish_command has a handle to
1316 the bp on a bpstat, and will later want to delete it. There's a
1317 chance (and I've seen it happen) that if we delete the bp_finish
1318 here, that its storage will get reused by the time finish_command
1319 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1320 We really must allow finish_command to delete a bp_finish.
1322 In the absense of a general solution for the "how do we know
1323 it's safe to delete something others may have handles to?"
1324 problem, what we'll do here is just uninsert the bp_finish, and
1325 let finish_command delete it.
1327 (We know the bp_finish is "doomed" in the sense that it's
1328 momentary, and will be deleted as soon as finish_command sees
1329 the inferior stopped. So it doesn't matter that the bp's
1330 address is probably bogus in the new a.out, unlike e.g., the
1331 solib breakpoints.) */
1333 if (b
->type
== bp_finish
)
1338 /* Without a symbolic address, we have little hope of the
1339 pre-exec() address meaning the same thing in the post-exec()
1341 if (b
->addr_string
== NULL
)
1343 delete_breakpoint (b
);
1347 /* If this breakpoint has survived the above battery of checks, then
1348 it must have a symbolic address. Be sure that it gets reevaluated
1349 to a target address, rather than reusing the old evaluation.
1351 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1352 for bp_catch_exec and friends, I'm pretty sure this is entirely
1353 unnecessary. A call to breakpoint_re_set_one always recomputes
1354 the breakpoint's address from scratch, or deletes it if it can't.
1355 So I think this assignment could be deleted without effect. */
1356 b
->loc
->address
= (CORE_ADDR
) NULL
;
1358 /* FIXME what about longjmp breakpoints? Re-create them here? */
1359 create_overlay_event_breakpoint ("_ovly_debug_event");
1363 detach_breakpoints (int pid
)
1365 struct bp_location
*b
;
1367 struct cleanup
*old_chain
= save_inferior_ptid ();
1369 if (pid
== PIDGET (inferior_ptid
))
1370 error ("Cannot detach breakpoints of inferior_ptid");
1372 /* Set inferior_ptid; remove_breakpoint uses this global. */
1373 inferior_ptid
= pid_to_ptid (pid
);
1374 ALL_BP_LOCATIONS (b
)
1378 val
= remove_breakpoint (b
, mark_inserted
);
1381 do_cleanups (old_chain
);
1386 do_cleanups (old_chain
);
1391 remove_breakpoint (struct bp_location
*b
, insertion_state_t is
)
1395 if (b
->owner
->enable_state
== bp_permanent
)
1396 /* Permanent breakpoints cannot be inserted or removed. */
1399 if (b
->owner
->type
== bp_none
)
1400 warning ("attempted to remove apparently deleted breakpoint #%d?",
1403 if (b
->loc_type
== bp_loc_software_breakpoint
1404 || b
->loc_type
== bp_loc_hardware_breakpoint
)
1406 /* "Normal" instruction breakpoint: either the standard
1407 trap-instruction bp (bp_breakpoint), or a
1408 bp_hardware_breakpoint. */
1410 /* First check to see if we have to handle an overlay. */
1411 if (overlay_debugging
== ovly_off
1412 || b
->section
== NULL
1413 || !(section_is_overlay (b
->section
)))
1415 /* No overlay handling: just remove the breakpoint. */
1417 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1418 val
= target_remove_hw_breakpoint (b
->address
,
1419 b
->shadow_contents
);
1421 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1425 /* This breakpoint is in an overlay section.
1426 Did we set a breakpoint at the LMA? */
1427 if (!overlay_events_enabled
)
1429 /* Yes -- overlay event support is not active, so we
1430 should have set a breakpoint at the LMA. Remove it.
1432 CORE_ADDR addr
= overlay_unmapped_address (b
->address
,
1434 /* Ignore any failures: if the LMA is in ROM, we will
1435 have already warned when we failed to insert it. */
1436 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1437 target_remove_hw_breakpoint (addr
, b
->shadow_contents
);
1439 target_remove_breakpoint (addr
, b
->shadow_contents
);
1441 /* Did we set a breakpoint at the VMA?
1442 If so, we will have marked the breakpoint 'inserted'. */
1445 /* Yes -- remove it. Previously we did not bother to
1446 remove the breakpoint if the section had been
1447 unmapped, but let's not rely on that being safe. We
1448 don't know what the overlay manager might do. */
1449 if (b
->loc_type
== bp_loc_hardware_breakpoint
)
1450 val
= target_remove_hw_breakpoint (b
->address
,
1451 b
->shadow_contents
);
1453 val
= target_remove_breakpoint (b
->address
,
1454 b
->shadow_contents
);
1458 /* No -- not inserted, so no need to remove. No error. */
1464 b
->inserted
= (is
== mark_inserted
);
1466 else if (b
->loc_type
== bp_loc_hardware_watchpoint
1467 && breakpoint_enabled (b
->owner
)
1473 b
->inserted
= (is
== mark_inserted
);
1474 /* Walk down the saved value chain. */
1475 for (v
= b
->owner
->val_chain
; v
; v
= v
->next
)
1477 /* For each memory reference remove the watchpoint
1479 if (VALUE_LVAL (v
) == lval_memory
1480 && ! VALUE_LAZY (v
))
1482 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
1484 if (v
== b
->owner
->val_chain
1485 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
1486 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
1491 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
1492 len
= TYPE_LENGTH (VALUE_TYPE (v
));
1494 if (b
->owner
->type
== bp_read_watchpoint
)
1496 else if (b
->owner
->type
== bp_access_watchpoint
)
1499 val
= target_remove_watchpoint (addr
, len
, type
);
1506 /* Failure to remove any of the hardware watchpoints comes here. */
1507 if ((is
== mark_uninserted
) && (b
->inserted
))
1508 warning ("Could not remove hardware watchpoint %d.",
1511 /* Free the saved value chain. We will construct a new one
1512 the next time the watchpoint is inserted. */
1513 for (v
= b
->owner
->val_chain
; v
; v
= n
)
1518 b
->owner
->val_chain
= NULL
;
1520 else if ((b
->owner
->type
== bp_catch_fork
||
1521 b
->owner
->type
== bp_catch_vfork
||
1522 b
->owner
->type
== bp_catch_exec
)
1523 && breakpoint_enabled (b
->owner
)
1527 switch (b
->owner
->type
)
1530 val
= target_remove_fork_catchpoint (PIDGET (inferior_ptid
));
1532 case bp_catch_vfork
:
1533 val
= target_remove_vfork_catchpoint (PIDGET (inferior_ptid
));
1536 val
= target_remove_exec_catchpoint (PIDGET (inferior_ptid
));
1539 warning ("Internal error, %s line %d.", __FILE__
, __LINE__
);
1544 b
->inserted
= (is
== mark_inserted
);
1546 else if ((b
->owner
->type
== bp_catch_catch
||
1547 b
->owner
->type
== bp_catch_throw
)
1548 && breakpoint_enabled (b
->owner
)
1552 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1555 b
->inserted
= (is
== mark_inserted
);
1557 else if (ep_is_exception_catchpoint (b
->owner
)
1558 && b
->inserted
/* sometimes previous insert doesn't happen */
1559 && breakpoint_enabled (b
->owner
)
1563 val
= target_remove_breakpoint (b
->address
, b
->shadow_contents
);
1567 b
->inserted
= (is
== mark_inserted
);
1573 /* Clear the "inserted" flag in all breakpoints. */
1576 mark_breakpoints_out (void)
1578 struct bp_location
*bpt
;
1580 ALL_BP_LOCATIONS (bpt
)
1584 /* Clear the "inserted" flag in all breakpoints and delete any
1585 breakpoints which should go away between runs of the program.
1587 Plus other such housekeeping that has to be done for breakpoints
1590 Note: this function gets called at the end of a run (by
1591 generic_mourn_inferior) and when a run begins (by
1592 init_wait_for_inferior). */
1597 breakpoint_init_inferior (enum inf_context context
)
1599 struct breakpoint
*b
, *temp
;
1600 struct bp_location
*bpt
;
1601 static int warning_needed
= 0;
1603 ALL_BP_LOCATIONS (bpt
)
1606 ALL_BREAKPOINTS_SAFE (b
, temp
)
1611 case bp_watchpoint_scope
:
1613 /* If the call dummy breakpoint is at the entry point it will
1614 cause problems when the inferior is rerun, so we better
1617 Also get rid of scope breakpoints. */
1618 delete_breakpoint (b
);
1622 case bp_hardware_watchpoint
:
1623 case bp_read_watchpoint
:
1624 case bp_access_watchpoint
:
1626 /* Likewise for watchpoints on local expressions. */
1627 if (b
->exp_valid_block
!= NULL
)
1628 delete_breakpoint (b
);
1629 if (context
== inf_starting
)
1631 /* Reset val field to force reread of starting value
1632 in insert_breakpoints. */
1634 value_free (b
->val
);
1639 /* Likewise for exception catchpoints in dynamic-linked
1640 executables where required */
1641 if (ep_is_exception_catchpoint (b
) &&
1642 exception_catchpoints_are_fragile
)
1645 delete_breakpoint (b
);
1651 if (exception_catchpoints_are_fragile
)
1652 exception_support_initialized
= 0;
1654 /* Don't issue the warning unless it's really needed... */
1655 if (warning_needed
&& (context
!= inf_exited
))
1657 warning ("Exception catchpoints from last run were deleted.");
1658 warning ("You must reinsert them explicitly.");
1663 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1664 exists at PC. It returns ordinary_breakpoint_here if it's an
1665 ordinary breakpoint, or permanent_breakpoint_here if it's a
1666 permanent breakpoint.
1667 - When continuing from a location with an ordinary breakpoint, we
1668 actually single step once before calling insert_breakpoints.
1669 - When continuing from a localion with a permanent breakpoint, we
1670 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1671 the target, to advance the PC past the breakpoint. */
1673 enum breakpoint_here
1674 breakpoint_here_p (CORE_ADDR pc
)
1676 struct bp_location
*bpt
;
1677 int any_breakpoint_here
= 0;
1679 ALL_BP_LOCATIONS (bpt
)
1681 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1682 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1685 if ((breakpoint_enabled (bpt
->owner
)
1686 || bpt
->owner
->enable_state
== bp_permanent
)
1687 && bpt
->address
== pc
) /* bp is enabled and matches pc */
1689 if (overlay_debugging
1690 && section_is_overlay (bpt
->section
)
1691 && !section_is_mapped (bpt
->section
))
1692 continue; /* unmapped overlay -- can't be a match */
1693 else if (bpt
->owner
->enable_state
== bp_permanent
)
1694 return permanent_breakpoint_here
;
1696 any_breakpoint_here
= 1;
1700 return any_breakpoint_here
? ordinary_breakpoint_here
: 0;
1704 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1705 but it only returns true if there is actually a breakpoint inserted
1709 breakpoint_inserted_here_p (CORE_ADDR pc
)
1711 struct bp_location
*bpt
;
1713 ALL_BP_LOCATIONS (bpt
)
1715 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1716 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1720 && bpt
->address
== pc
) /* bp is inserted and matches pc */
1722 if (overlay_debugging
1723 && section_is_overlay (bpt
->section
)
1724 && !section_is_mapped (bpt
->section
))
1725 continue; /* unmapped overlay -- can't be a match */
1734 /* Return nonzero if FRAME is a dummy frame. We can't use
1735 DEPRECATED_PC_IN_CALL_DUMMY because figuring out the saved SP would
1736 take too much time, at least using frame_register() on the 68k.
1737 This means that for this function to work right a port must use the
1738 bp_call_dummy breakpoint. */
1741 deprecated_frame_in_dummy (struct frame_info
*frame
)
1743 struct breakpoint
*b
;
1745 /* This function is used by two files: get_frame_type(), after first
1746 checking that !DEPRECATED_USE_GENERIC_DUMMY_FRAMES; and
1747 sparc-tdep.c, which doesn't yet use generic dummy frames anyway. */
1748 gdb_assert (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES
);
1752 if (b
->type
== bp_call_dummy
1753 && frame_id_eq (b
->frame_id
, get_frame_id (frame
))
1754 /* We need to check the PC as well as the frame on the sparc,
1755 for signals.exp in the testsuite. */
1756 && (get_frame_pc (frame
)
1758 - DEPRECATED_SIZEOF_CALL_DUMMY_WORDS
/ sizeof (LONGEST
) * DEPRECATED_REGISTER_SIZE
))
1759 && get_frame_pc (frame
) <= b
->loc
->address
)
1765 /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at
1766 PC is valid for process/thread PTID. */
1769 breakpoint_thread_match (CORE_ADDR pc
, ptid_t ptid
)
1771 struct bp_location
*bpt
;
1774 thread
= pid_to_thread_id (ptid
);
1776 ALL_BP_LOCATIONS (bpt
)
1778 if (bpt
->loc_type
!= bp_loc_software_breakpoint
1779 && bpt
->loc_type
!= bp_loc_hardware_breakpoint
)
1782 if ((breakpoint_enabled (bpt
->owner
)
1783 || bpt
->owner
->enable_state
== bp_permanent
)
1784 && bpt
->address
== pc
1785 && (bpt
->owner
->thread
== -1 || bpt
->owner
->thread
== thread
))
1787 if (overlay_debugging
1788 && section_is_overlay (bpt
->section
)
1789 && !section_is_mapped (bpt
->section
))
1790 continue; /* unmapped overlay -- can't be a match */
1800 /* bpstat stuff. External routines' interfaces are documented
1804 ep_is_catchpoint (struct breakpoint
*ep
)
1807 (ep
->type
== bp_catch_load
)
1808 || (ep
->type
== bp_catch_unload
)
1809 || (ep
->type
== bp_catch_fork
)
1810 || (ep
->type
== bp_catch_vfork
)
1811 || (ep
->type
== bp_catch_exec
)
1812 || (ep
->type
== bp_catch_catch
)
1813 || (ep
->type
== bp_catch_throw
);
1815 /* ??rehrauer: Add more kinds here, as are implemented... */
1819 ep_is_shlib_catchpoint (struct breakpoint
*ep
)
1822 (ep
->type
== bp_catch_load
)
1823 || (ep
->type
== bp_catch_unload
);
1827 ep_is_exception_catchpoint (struct breakpoint
*ep
)
1830 (ep
->type
== bp_catch_catch
)
1831 || (ep
->type
== bp_catch_throw
);
1834 /* Clear a bpstat so that it says we are not at any breakpoint.
1835 Also free any storage that is part of a bpstat. */
1838 bpstat_clear (bpstat
*bsp
)
1849 if (p
->old_val
!= NULL
)
1850 value_free (p
->old_val
);
1851 free_command_lines (&p
->commands
);
1858 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1859 is part of the bpstat is copied as well. */
1862 bpstat_copy (bpstat bs
)
1866 bpstat retval
= NULL
;
1871 for (; bs
!= NULL
; bs
= bs
->next
)
1873 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
1874 memcpy (tmp
, bs
, sizeof (*tmp
));
1875 if (bs
->commands
!= NULL
)
1876 tmp
->commands
= copy_command_lines (bs
->commands
);
1877 if (bs
->old_val
!= NULL
)
1878 tmp
->old_val
= value_copy (bs
->old_val
);
1881 /* This is the first thing in the chain. */
1891 /* Find the bpstat associated with this breakpoint */
1894 bpstat_find_breakpoint (bpstat bsp
, struct breakpoint
*breakpoint
)
1899 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1901 if (bsp
->breakpoint_at
== breakpoint
)
1907 /* Find a step_resume breakpoint associated with this bpstat.
1908 (If there are multiple step_resume bp's on the list, this function
1909 will arbitrarily pick one.)
1911 It is an error to use this function if BPSTAT doesn't contain a
1912 step_resume breakpoint.
1914 See wait_for_inferior's use of this function. */
1916 bpstat_find_step_resume_breakpoint (bpstat bsp
)
1921 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1923 current_thread
= pid_to_thread_id (inferior_ptid
);
1925 for (; bsp
!= NULL
; bsp
= bsp
->next
)
1927 if ((bsp
->breakpoint_at
!= NULL
) &&
1928 (bsp
->breakpoint_at
->type
== bp_step_resume
) &&
1929 (bsp
->breakpoint_at
->thread
== current_thread
||
1930 bsp
->breakpoint_at
->thread
== -1))
1931 return bsp
->breakpoint_at
;
1934 error ("Internal error (no step_resume breakpoint found)");
1938 /* Return the breakpoint number of the first breakpoint we are stopped
1939 at. *BSP upon return is a bpstat which points to the remaining
1940 breakpoints stopped at (but which is not guaranteed to be good for
1941 anything but further calls to bpstat_num).
1942 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1945 bpstat_num (bpstat
*bsp
)
1947 struct breakpoint
*b
;
1950 return 0; /* No more breakpoint values */
1953 b
= (*bsp
)->breakpoint_at
;
1954 *bsp
= (*bsp
)->next
;
1956 return -1; /* breakpoint that's been deleted since */
1958 return b
->number
; /* We have its number */
1962 /* Modify BS so that the actions will not be performed. */
1965 bpstat_clear_actions (bpstat bs
)
1967 for (; bs
!= NULL
; bs
= bs
->next
)
1969 free_command_lines (&bs
->commands
);
1970 if (bs
->old_val
!= NULL
)
1972 value_free (bs
->old_val
);
1978 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1980 cleanup_executing_breakpoints (void *ignore
)
1982 executing_breakpoint_commands
= 0;
1985 /* Execute all the commands associated with all the breakpoints at this
1986 location. Any of these commands could cause the process to proceed
1987 beyond this point, etc. We look out for such changes by checking
1988 the global "breakpoint_proceeded" after each command. */
1991 bpstat_do_actions (bpstat
*bsp
)
1994 struct cleanup
*old_chain
;
1996 /* Avoid endless recursion if a `source' command is contained
1998 if (executing_breakpoint_commands
)
2001 executing_breakpoint_commands
= 1;
2002 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
2005 /* Note that (as of this writing), our callers all appear to
2006 be passing us the address of global stop_bpstat. And, if
2007 our calls to execute_control_command cause the inferior to
2008 proceed, that global (and hence, *bsp) will change.
2010 We must be careful to not touch *bsp unless the inferior
2011 has not proceeded. */
2013 /* This pointer will iterate over the list of bpstat's. */
2016 breakpoint_proceeded
= 0;
2017 for (; bs
!= NULL
; bs
= bs
->next
)
2019 struct command_line
*cmd
;
2020 struct cleanup
*this_cmd_tree_chain
;
2022 /* Take ownership of the BSP's command tree, if it has one.
2024 The command tree could legitimately contain commands like
2025 'step' and 'next', which call clear_proceed_status, which
2026 frees stop_bpstat's command tree. To make sure this doesn't
2027 free the tree we're executing out from under us, we need to
2028 take ownership of the tree ourselves. Since a given bpstat's
2029 commands are only executed once, we don't need to copy it; we
2030 can clear the pointer in the bpstat, and make sure we free
2031 the tree when we're done. */
2034 this_cmd_tree_chain
= make_cleanup_free_command_lines (&cmd
);
2038 execute_control_command (cmd
);
2040 if (breakpoint_proceeded
)
2046 /* We can free this command tree now. */
2047 do_cleanups (this_cmd_tree_chain
);
2049 if (breakpoint_proceeded
)
2050 /* The inferior is proceeded by the command; bomb out now.
2051 The bpstat chain has been blown away by wait_for_inferior.
2052 But since execution has stopped again, there is a new bpstat
2053 to look at, so start over. */
2056 do_cleanups (old_chain
);
2059 /* This is the normal print function for a bpstat. In the future,
2060 much of this logic could (should?) be moved to bpstat_stop_status,
2061 by having it set different print_it values.
2063 Current scheme: When we stop, bpstat_print() is called. It loops
2064 through the bpstat list of things causing this stop, calling the
2065 print_bp_stop_message function on each one. The behavior of the
2066 print_bp_stop_message function depends on the print_it field of
2067 bpstat. If such field so indicates, call this function here.
2069 Return values from this routine (ultimately used by bpstat_print()
2070 and normal_stop() to decide what to do):
2071 PRINT_NOTHING: Means we already printed all we needed to print,
2072 don't print anything else.
2073 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
2074 that something to be followed by a location.
2075 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
2076 that something to be followed by a location.
2077 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
2080 static enum print_stop_action
2081 print_it_typical (bpstat bs
)
2083 struct cleanup
*old_chain
, *ui_out_chain
;
2084 struct ui_stream
*stb
;
2085 stb
= ui_out_stream_new (uiout
);
2086 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
2087 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
2088 which has since been deleted. */
2089 if (bs
->breakpoint_at
== NULL
)
2090 return PRINT_UNKNOWN
;
2092 switch (bs
->breakpoint_at
->type
)
2095 case bp_hardware_breakpoint
:
2096 if (bs
->breakpoint_at
->loc
->address
!= bs
->breakpoint_at
->loc
->requested_address
)
2097 breakpoint_adjustment_warning (bs
->breakpoint_at
->loc
->requested_address
,
2098 bs
->breakpoint_at
->loc
->address
,
2099 bs
->breakpoint_at
->number
, 1);
2100 annotate_breakpoint (bs
->breakpoint_at
->number
);
2101 ui_out_text (uiout
, "\nBreakpoint ");
2102 if (ui_out_is_mi_like_p (uiout
))
2103 ui_out_field_string (uiout
, "reason", "breakpoint-hit");
2104 ui_out_field_int (uiout
, "bkptno", bs
->breakpoint_at
->number
);
2105 ui_out_text (uiout
, ", ");
2106 return PRINT_SRC_AND_LOC
;
2109 case bp_shlib_event
:
2110 /* Did we stop because the user set the stop_on_solib_events
2111 variable? (If so, we report this as a generic, "Stopped due
2112 to shlib event" message.) */
2113 printf_filtered ("Stopped due to shared library event\n");
2114 return PRINT_NOTHING
;
2117 case bp_thread_event
:
2118 /* Not sure how we will get here.
2119 GDB should not stop for these breakpoints. */
2120 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
2121 return PRINT_NOTHING
;
2124 case bp_overlay_event
:
2125 /* By analogy with the thread event, GDB should not stop for these. */
2126 printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n");
2127 return PRINT_NOTHING
;
2131 annotate_catchpoint (bs
->breakpoint_at
->number
);
2132 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2133 printf_filtered ("loaded");
2134 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2135 return PRINT_SRC_AND_LOC
;
2138 case bp_catch_unload
:
2139 annotate_catchpoint (bs
->breakpoint_at
->number
);
2140 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2141 printf_filtered ("unloaded");
2142 printf_filtered (" %s), ", bs
->breakpoint_at
->triggered_dll_pathname
);
2143 return PRINT_SRC_AND_LOC
;
2147 annotate_catchpoint (bs
->breakpoint_at
->number
);
2148 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2149 printf_filtered ("forked");
2150 printf_filtered (" process %d), ",
2151 bs
->breakpoint_at
->forked_inferior_pid
);
2152 return PRINT_SRC_AND_LOC
;
2155 case bp_catch_vfork
:
2156 annotate_catchpoint (bs
->breakpoint_at
->number
);
2157 printf_filtered ("\nCatchpoint %d (", bs
->breakpoint_at
->number
);
2158 printf_filtered ("vforked");
2159 printf_filtered (" process %d), ",
2160 bs
->breakpoint_at
->forked_inferior_pid
);
2161 return PRINT_SRC_AND_LOC
;
2165 annotate_catchpoint (bs
->breakpoint_at
->number
);
2166 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
2167 bs
->breakpoint_at
->number
,
2168 bs
->breakpoint_at
->exec_pathname
);
2169 return PRINT_SRC_AND_LOC
;
2172 case bp_catch_catch
:
2173 if (current_exception_event
&&
2174 (CURRENT_EXCEPTION_KIND
== EX_EVENT_CATCH
))
2176 annotate_catchpoint (bs
->breakpoint_at
->number
);
2177 printf_filtered ("\nCatchpoint %d (exception caught), ",
2178 bs
->breakpoint_at
->number
);
2179 printf_filtered ("throw location ");
2180 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2181 printf_filtered ("%s:%d",
2182 CURRENT_EXCEPTION_THROW_FILE
,
2183 CURRENT_EXCEPTION_THROW_LINE
);
2185 printf_filtered ("unknown");
2187 printf_filtered (", catch location ");
2188 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2189 printf_filtered ("%s:%d",
2190 CURRENT_EXCEPTION_CATCH_FILE
,
2191 CURRENT_EXCEPTION_CATCH_LINE
);
2193 printf_filtered ("unknown");
2195 printf_filtered ("\n");
2196 /* don't bother to print location frame info */
2197 return PRINT_SRC_ONLY
;
2201 /* really throw, some other bpstat will handle it */
2202 return PRINT_UNKNOWN
;
2206 case bp_catch_throw
:
2207 if (current_exception_event
&&
2208 (CURRENT_EXCEPTION_KIND
== EX_EVENT_THROW
))
2210 annotate_catchpoint (bs
->breakpoint_at
->number
);
2211 printf_filtered ("\nCatchpoint %d (exception thrown), ",
2212 bs
->breakpoint_at
->number
);
2213 printf_filtered ("throw location ");
2214 if (CURRENT_EXCEPTION_THROW_PC
&& CURRENT_EXCEPTION_THROW_LINE
)
2215 printf_filtered ("%s:%d",
2216 CURRENT_EXCEPTION_THROW_FILE
,
2217 CURRENT_EXCEPTION_THROW_LINE
);
2219 printf_filtered ("unknown");
2221 printf_filtered (", catch location ");
2222 if (CURRENT_EXCEPTION_CATCH_PC
&& CURRENT_EXCEPTION_CATCH_LINE
)
2223 printf_filtered ("%s:%d",
2224 CURRENT_EXCEPTION_CATCH_FILE
,
2225 CURRENT_EXCEPTION_CATCH_LINE
);
2227 printf_filtered ("unknown");
2229 printf_filtered ("\n");
2230 /* don't bother to print location frame info */
2231 return PRINT_SRC_ONLY
;
2235 /* really catch, some other bpstat will handle it */
2236 return PRINT_UNKNOWN
;
2241 case bp_hardware_watchpoint
:
2242 if (bs
->old_val
!= NULL
)
2244 annotate_watchpoint (bs
->breakpoint_at
->number
);
2245 if (ui_out_is_mi_like_p (uiout
))
2246 ui_out_field_string (uiout
, "reason", "watchpoint-trigger");
2247 mention (bs
->breakpoint_at
);
2248 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2249 ui_out_text (uiout
, "\nOld value = ");
2250 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2251 ui_out_field_stream (uiout
, "old", stb
);
2252 ui_out_text (uiout
, "\nNew value = ");
2253 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2254 ui_out_field_stream (uiout
, "new", stb
);
2255 do_cleanups (ui_out_chain
);
2256 ui_out_text (uiout
, "\n");
2257 value_free (bs
->old_val
);
2260 /* More than one watchpoint may have been triggered. */
2261 return PRINT_UNKNOWN
;
2264 case bp_read_watchpoint
:
2265 if (ui_out_is_mi_like_p (uiout
))
2266 ui_out_field_string (uiout
, "reason", "read-watchpoint-trigger");
2267 mention (bs
->breakpoint_at
);
2268 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2269 ui_out_text (uiout
, "\nValue = ");
2270 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0, Val_pretty_default
);
2271 ui_out_field_stream (uiout
, "value", stb
);
2272 do_cleanups (ui_out_chain
);
2273 ui_out_text (uiout
, "\n");
2274 return PRINT_UNKNOWN
;
2277 case bp_access_watchpoint
:
2278 if (bs
->old_val
!= NULL
)
2280 annotate_watchpoint (bs
->breakpoint_at
->number
);
2281 if (ui_out_is_mi_like_p (uiout
))
2282 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2283 mention (bs
->breakpoint_at
);
2284 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2285 ui_out_text (uiout
, "\nOld value = ");
2286 value_print (bs
->old_val
, stb
->stream
, 0, Val_pretty_default
);
2287 ui_out_field_stream (uiout
, "old", stb
);
2288 value_free (bs
->old_val
);
2290 ui_out_text (uiout
, "\nNew value = ");
2294 mention (bs
->breakpoint_at
);
2295 if (ui_out_is_mi_like_p (uiout
))
2296 ui_out_field_string (uiout
, "reason", "access-watchpoint-trigger");
2297 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "value");
2298 ui_out_text (uiout
, "\nValue = ");
2300 value_print (bs
->breakpoint_at
->val
, stb
->stream
, 0,Val_pretty_default
);
2301 ui_out_field_stream (uiout
, "new", stb
);
2302 do_cleanups (ui_out_chain
);
2303 ui_out_text (uiout
, "\n");
2304 return PRINT_UNKNOWN
;
2307 /* Fall through, we don't deal with these types of breakpoints
2311 if (ui_out_is_mi_like_p (uiout
))
2312 ui_out_field_string (uiout
, "reason", "function-finished");
2313 return PRINT_UNKNOWN
;
2317 if (ui_out_is_mi_like_p (uiout
))
2318 ui_out_field_string (uiout
, "reason", "location-reached");
2319 return PRINT_UNKNOWN
;
2324 case bp_longjmp_resume
:
2325 case bp_step_resume
:
2326 case bp_through_sigtramp
:
2327 case bp_watchpoint_scope
:
2330 return PRINT_UNKNOWN
;
2334 /* Generic routine for printing messages indicating why we
2335 stopped. The behavior of this function depends on the value
2336 'print_it' in the bpstat structure. Under some circumstances we
2337 may decide not to print anything here and delegate the task to
2340 static enum print_stop_action
2341 print_bp_stop_message (bpstat bs
)
2343 switch (bs
->print_it
)
2346 /* Nothing should be printed for this bpstat entry. */
2347 return PRINT_UNKNOWN
;
2351 /* We still want to print the frame, but we already printed the
2352 relevant messages. */
2353 return PRINT_SRC_AND_LOC
;
2356 case print_it_normal
:
2357 /* Normal case. Call the breakpoint's print_it method, or
2358 print_it_typical. */
2359 if (bs
->breakpoint_at
!= NULL
&& bs
->breakpoint_at
->ops
!= NULL
2360 && bs
->breakpoint_at
->ops
->print_it
!= NULL
)
2361 return bs
->breakpoint_at
->ops
->print_it (bs
->breakpoint_at
);
2363 return print_it_typical (bs
);
2367 internal_error (__FILE__
, __LINE__
,
2368 "print_bp_stop_message: unrecognized enum value");
2373 /* Print a message indicating what happened. This is called from
2374 normal_stop(). The input to this routine is the head of the bpstat
2375 list - a list of the eventpoints that caused this stop. This
2376 routine calls the generic print routine for printing a message
2377 about reasons for stopping. This will print (for example) the
2378 "Breakpoint n," part of the output. The return value of this
2381 PRINT_UNKNOWN: Means we printed nothing
2382 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2383 code to print the location. An example is
2384 "Breakpoint 1, " which should be followed by
2386 PRINT_SRC_ONLY: Means we printed something, but there is no need
2387 to also print the location part of the message.
2388 An example is the catch/throw messages, which
2389 don't require a location appended to the end.
2390 PRINT_NOTHING: We have done some printing and we don't need any
2391 further info to be printed.*/
2393 enum print_stop_action
2394 bpstat_print (bpstat bs
)
2398 /* Maybe another breakpoint in the chain caused us to stop.
2399 (Currently all watchpoints go on the bpstat whether hit or not.
2400 That probably could (should) be changed, provided care is taken
2401 with respect to bpstat_explains_signal). */
2402 for (; bs
; bs
= bs
->next
)
2404 val
= print_bp_stop_message (bs
);
2405 if (val
== PRINT_SRC_ONLY
2406 || val
== PRINT_SRC_AND_LOC
2407 || val
== PRINT_NOTHING
)
2411 /* We reached the end of the chain, or we got a null BS to start
2412 with and nothing was printed. */
2413 return PRINT_UNKNOWN
;
2416 /* Evaluate the expression EXP and return 1 if value is zero.
2417 This is used inside a catch_errors to evaluate the breakpoint condition.
2418 The argument is a "struct expression *" that has been cast to char * to
2419 make it pass through catch_errors. */
2422 breakpoint_cond_eval (void *exp
)
2424 struct value
*mark
= value_mark ();
2425 int i
= !value_true (evaluate_expression ((struct expression
*) exp
));
2426 value_free_to_mark (mark
);
2430 /* Allocate a new bpstat and chain it to the current one. */
2433 bpstat_alloc (struct breakpoint
*b
, bpstat cbs
/* Current "bs" value */ )
2437 bs
= (bpstat
) xmalloc (sizeof (*bs
));
2439 bs
->breakpoint_at
= b
;
2440 /* If the condition is false, etc., don't do the commands. */
2441 bs
->commands
= NULL
;
2443 bs
->print_it
= print_it_normal
;
2447 /* Possible return values for watchpoint_check (this can't be an enum
2448 because of check_errors). */
2449 /* The watchpoint has been deleted. */
2450 #define WP_DELETED 1
2451 /* The value has changed. */
2452 #define WP_VALUE_CHANGED 2
2453 /* The value has not changed. */
2454 #define WP_VALUE_NOT_CHANGED 3
2456 #define BP_TEMPFLAG 1
2457 #define BP_HARDWAREFLAG 2
2459 /* Check watchpoint condition. */
2462 watchpoint_check (void *p
)
2464 bpstat bs
= (bpstat
) p
;
2465 struct breakpoint
*b
;
2466 struct frame_info
*fr
;
2467 int within_current_scope
;
2469 struct frame_id current_frame_id
;
2472 b
= bs
->breakpoint_at
;
2474 if (b
->exp_valid_block
== NULL
)
2475 within_current_scope
= 1;
2478 /* There is no current frame at this moment. If we're going to have
2479 any chance of handling watchpoints on local variables, we'll need
2480 the frame chain (so we can determine if we're in scope). */
2481 reinit_frame_cache ();
2482 fr
= frame_find_by_id (b
->watchpoint_frame
);
2483 within_current_scope
= (fr
!= NULL
);
2484 /* in_function_epilogue_p() returns a non-zero value if we're still
2485 in the function but the stack frame has already been invalidated.
2486 Since we can't rely on the values of local variables after the
2487 stack has been destroyed, we are treating the watchpoint in that
2488 state as `not changed' without further checking.
2490 vinschen/2003-09-04: The former implementation left out the case
2491 that the watchpoint frame couldn't be found by frame_find_by_id()
2492 because the current PC is currently in an epilogue. Calling
2493 gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
2494 if ((!within_current_scope
|| fr
== get_current_frame ())
2495 && gdbarch_in_function_epilogue_p (current_gdbarch
, read_pc ()))
2496 return WP_VALUE_NOT_CHANGED
;
2497 if (fr
&& within_current_scope
)
2498 /* If we end up stopping, the current frame will get selected
2499 in normal_stop. So this call to select_frame won't affect
2504 if (within_current_scope
)
2506 /* We use value_{,free_to_}mark because it could be a
2507 *long* time before we return to the command level and
2508 call free_all_values. We can't call free_all_values because
2509 we might be in the middle of evaluating a function call. */
2511 struct value
*mark
= value_mark ();
2512 struct value
*new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
2513 if (!value_equal (b
->val
, new_val
))
2515 release_value (new_val
);
2516 value_free_to_mark (mark
);
2517 bs
->old_val
= b
->val
;
2519 /* We will stop here */
2520 return WP_VALUE_CHANGED
;
2524 /* Nothing changed, don't do anything. */
2525 value_free_to_mark (mark
);
2526 /* We won't stop here */
2527 return WP_VALUE_NOT_CHANGED
;
2532 /* This seems like the only logical thing to do because
2533 if we temporarily ignored the watchpoint, then when
2534 we reenter the block in which it is valid it contains
2535 garbage (in the case of a function, it may have two
2536 garbage values, one before and one after the prologue).
2537 So we can't even detect the first assignment to it and
2538 watch after that (since the garbage may or may not equal
2539 the first value assigned). */
2540 /* We print all the stop information in print_it_typical(), but
2541 in this case, by the time we call print_it_typical() this bp
2542 will be deleted already. So we have no choice but print the
2543 information here. */
2544 if (ui_out_is_mi_like_p (uiout
))
2545 ui_out_field_string (uiout
, "reason", "watchpoint-scope");
2546 ui_out_text (uiout
, "\nWatchpoint ");
2547 ui_out_field_int (uiout
, "wpnum", bs
->breakpoint_at
->number
);
2548 ui_out_text (uiout
, " deleted because the program has left the block in\n\
2549 which its expression is valid.\n");
2551 if (b
->related_breakpoint
)
2552 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2553 b
->disposition
= disp_del_at_next_stop
;
2559 /* Get a bpstat associated with having just stopped at address *PC
2560 and frame address CORE_ADDRESS. Update *PC to point at the
2561 breakpoint (if we hit a breakpoint). NOT_A_SW_BREAKPOINT is nonzero
2562 if this is known to not be a real breakpoint (it could still be a
2563 watchpoint, though). */
2565 /* Determine whether we stopped at a breakpoint, etc, or whether we
2566 don't understand this stop. Result is a chain of bpstat's such that:
2568 if we don't understand the stop, the result is a null pointer.
2570 if we understand why we stopped, the result is not null.
2572 Each element of the chain refers to a particular breakpoint or
2573 watchpoint at which we have stopped. (We may have stopped for
2574 several reasons concurrently.)
2576 Each element of the chain has valid next, breakpoint_at,
2577 commands, FIXME??? fields. */
2580 bpstat_stop_status (CORE_ADDR
*pc
, int not_a_sw_breakpoint
)
2582 struct breakpoint
*b
, *temp
;
2584 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2585 int real_breakpoint
= 0;
2586 /* Root of the chain of bpstat's */
2587 struct bpstats root_bs
[1];
2588 /* Pointer to the last thing in the chain currently. */
2589 bpstat bs
= root_bs
;
2591 /* Get the address where the breakpoint would have been. The
2592 "not_a_sw_breakpoint" argument is meant to distinguish between a
2593 breakpoint trap event and a trace/singlestep trap event. For a
2594 trace/singlestep trap event, we would not want to subtract
2595 DECR_PC_AFTER_BREAK from the PC. */
2597 bp_addr
= *pc
- (not_a_sw_breakpoint
? 0 : DECR_PC_AFTER_BREAK
);
2599 ALL_BREAKPOINTS_SAFE (b
, temp
)
2601 if (!breakpoint_enabled (b
) && b
->enable_state
!= bp_permanent
)
2604 if (b
->type
!= bp_watchpoint
2605 && b
->type
!= bp_hardware_watchpoint
2606 && b
->type
!= bp_read_watchpoint
2607 && b
->type
!= bp_access_watchpoint
2608 && b
->type
!= bp_hardware_breakpoint
2609 && b
->type
!= bp_catch_fork
2610 && b
->type
!= bp_catch_vfork
2611 && b
->type
!= bp_catch_exec
2612 && b
->type
!= bp_catch_catch
2613 && b
->type
!= bp_catch_throw
) /* a non-watchpoint bp */
2615 if (b
->loc
->address
!= bp_addr
) /* address doesn't match */
2617 if (overlay_debugging
/* unmapped overlay section */
2618 && section_is_overlay (b
->loc
->section
)
2619 && !section_is_mapped (b
->loc
->section
))
2623 if (b
->type
== bp_hardware_breakpoint
)
2625 if (b
->loc
->address
!= (*pc
- DECR_PC_AFTER_HW_BREAK
))
2627 if (overlay_debugging
/* unmapped overlay section */
2628 && section_is_overlay (b
->loc
->section
)
2629 && !section_is_mapped (b
->loc
->section
))
2633 /* Is this a catchpoint of a load or unload? If so, did we
2634 get a load or unload of the specified library? If not,
2636 if ((b
->type
== bp_catch_load
)
2637 #if defined(SOLIB_HAVE_LOAD_EVENT)
2638 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid
))
2639 || ((b
->dll_pathname
!= NULL
)
2640 && (strcmp (b
->dll_pathname
,
2641 SOLIB_LOADED_LIBRARY_PATHNAME (
2642 PIDGET (inferior_ptid
)))
2648 if ((b
->type
== bp_catch_unload
)
2649 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2650 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid
))
2651 || ((b
->dll_pathname
!= NULL
)
2652 && (strcmp (b
->dll_pathname
,
2653 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2654 PIDGET (inferior_ptid
)))
2660 if ((b
->type
== bp_catch_fork
)
2661 && !inferior_has_forked (PIDGET (inferior_ptid
),
2662 &b
->forked_inferior_pid
))
2665 if ((b
->type
== bp_catch_vfork
)
2666 && !inferior_has_vforked (PIDGET (inferior_ptid
),
2667 &b
->forked_inferior_pid
))
2670 if ((b
->type
== bp_catch_exec
)
2671 && !inferior_has_execd (PIDGET (inferior_ptid
), &b
->exec_pathname
))
2674 if (ep_is_exception_catchpoint (b
) &&
2675 !(current_exception_event
= target_get_current_exception_event ()))
2678 /* Come here if it's a watchpoint, or if the break address matches */
2680 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
2682 /* Watchpoints may change this, if not found to have triggered. */
2686 if (b
->type
== bp_watchpoint
||
2687 b
->type
== bp_hardware_watchpoint
)
2689 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2691 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2692 int e
= catch_errors (watchpoint_check
, bs
, message
,
2694 do_cleanups (cleanups
);
2698 /* We've already printed what needs to be printed. */
2699 /* Actually this is superfluous, because by the time we
2700 call print_it_typical() the wp will be already deleted,
2701 and the function will return immediately. */
2702 bs
->print_it
= print_it_done
;
2705 case WP_VALUE_CHANGED
:
2709 case WP_VALUE_NOT_CHANGED
:
2711 bs
->print_it
= print_it_noop
;
2718 /* Error from catch_errors. */
2719 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2720 if (b
->related_breakpoint
)
2721 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2722 b
->disposition
= disp_del_at_next_stop
;
2723 /* We've already printed what needs to be printed. */
2724 bs
->print_it
= print_it_done
;
2730 else if (b
->type
== bp_read_watchpoint
||
2731 b
->type
== bp_access_watchpoint
)
2737 addr
= target_stopped_data_address ();
2740 for (v
= b
->val_chain
; v
; v
= v
->next
)
2742 if (VALUE_LVAL (v
) == lval_memory
2743 && ! VALUE_LAZY (v
))
2745 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
2747 if (v
== b
->val_chain
2748 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
2749 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
2753 vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
2754 /* Exact match not required. Within range is
2756 if (addr
>= vaddr
&&
2757 addr
< vaddr
+ TYPE_LENGTH (VALUE_TYPE (v
)))
2764 char *message
= xstrprintf ("Error evaluating expression for watchpoint %d\n",
2766 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
2767 int e
= catch_errors (watchpoint_check
, bs
, message
,
2769 do_cleanups (cleanups
);
2773 /* We've already printed what needs to be printed. */
2774 bs
->print_it
= print_it_done
;
2777 case WP_VALUE_CHANGED
:
2778 if (b
->type
== bp_read_watchpoint
)
2780 /* Don't stop: read watchpoints shouldn't fire if
2781 the value has changed. This is for targets
2782 which cannot set read-only watchpoints. */
2783 bs
->print_it
= print_it_noop
;
2789 case WP_VALUE_NOT_CHANGED
:
2796 /* Error from catch_errors. */
2797 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
2798 if (b
->related_breakpoint
)
2799 b
->related_breakpoint
->disposition
= disp_del_at_next_stop
;
2800 b
->disposition
= disp_del_at_next_stop
;
2801 /* We've already printed what needs to be printed. */
2802 bs
->print_it
= print_it_done
;
2806 else /* found == 0 */
2808 /* This is a case where some watchpoint(s) triggered,
2809 but not at the address of this watchpoint (FOUND
2810 was left zero). So don't print anything for this
2812 bs
->print_it
= print_it_noop
;
2819 /* By definition, an encountered breakpoint is a triggered
2823 real_breakpoint
= 1;
2826 if (frame_id_p (b
->frame_id
)
2827 && !frame_id_eq (b
->frame_id
, get_frame_id (get_current_frame ())))
2831 int value_is_zero
= 0;
2835 /* Need to select the frame, with all that implies
2836 so that the conditions will have the right context. */
2837 select_frame (get_current_frame ());
2839 = catch_errors (breakpoint_cond_eval
, (b
->cond
),
2840 "Error in testing breakpoint condition:\n",
2842 /* FIXME-someday, should give breakpoint # */
2845 if (b
->cond
&& value_is_zero
)
2848 /* Don't consider this a hit. */
2851 else if (b
->ignore_count
> 0)
2854 annotate_ignore_count_change ();
2859 /* We will stop here */
2860 if (b
->disposition
== disp_disable
)
2861 b
->enable_state
= bp_disabled
;
2864 bs
->commands
= b
->commands
;
2866 (strcmp ("silent", bs
->commands
->line
) == 0
2867 || (xdb_commands
&& strcmp ("Q", bs
->commands
->line
) == 0)))
2869 bs
->commands
= bs
->commands
->next
;
2872 bs
->commands
= copy_command_lines (bs
->commands
);
2875 /* Print nothing for this entry if we dont stop or if we dont print. */
2876 if (bs
->stop
== 0 || bs
->print
== 0)
2877 bs
->print_it
= print_it_noop
;
2880 bs
->next
= NULL
; /* Terminate the chain */
2881 bs
= root_bs
->next
; /* Re-grab the head of the chain */
2883 if (real_breakpoint
&& bs
)
2885 if (bs
->breakpoint_at
->type
== bp_hardware_breakpoint
)
2887 if (DECR_PC_AFTER_HW_BREAK
!= 0)
2889 *pc
= *pc
- DECR_PC_AFTER_HW_BREAK
;
2895 if (DECR_PC_AFTER_BREAK
!= 0 || must_shift_inst_regs
)
2898 #if defined (SHIFT_INST_REGS)
2900 #else /* No SHIFT_INST_REGS. */
2902 #endif /* No SHIFT_INST_REGS. */
2907 /* The value of a hardware watchpoint hasn't changed, but the
2908 intermediate memory locations we are watching may have. */
2909 if (bs
&& !bs
->stop
&&
2910 (bs
->breakpoint_at
->type
== bp_hardware_watchpoint
||
2911 bs
->breakpoint_at
->type
== bp_read_watchpoint
||
2912 bs
->breakpoint_at
->type
== bp_access_watchpoint
))
2914 remove_breakpoints ();
2915 insert_breakpoints ();
2920 /* Tell what to do about this bpstat. */
2922 bpstat_what (bpstat bs
)
2924 /* Classify each bpstat as one of the following. */
2927 /* This bpstat element has no effect on the main_action. */
2930 /* There was a watchpoint, stop but don't print. */
2933 /* There was a watchpoint, stop and print. */
2936 /* There was a breakpoint but we're not stopping. */
2939 /* There was a breakpoint, stop but don't print. */
2942 /* There was a breakpoint, stop and print. */
2945 /* We hit the longjmp breakpoint. */
2948 /* We hit the longjmp_resume breakpoint. */
2951 /* We hit the step_resume breakpoint. */
2954 /* We hit the through_sigtramp breakpoint. */
2957 /* We hit the shared library event breakpoint. */
2960 /* We caught a shared library event. */
2963 /* This is just used to count how many enums there are. */
2967 /* Here is the table which drives this routine. So that we can
2968 format it pretty, we define some abbreviations for the
2969 enum bpstat_what codes. */
2970 #define kc BPSTAT_WHAT_KEEP_CHECKING
2971 #define ss BPSTAT_WHAT_STOP_SILENT
2972 #define sn BPSTAT_WHAT_STOP_NOISY
2973 #define sgl BPSTAT_WHAT_SINGLE
2974 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2975 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2976 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2977 #define sr BPSTAT_WHAT_STEP_RESUME
2978 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2979 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2980 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2982 /* "Can't happen." Might want to print an error message.
2983 abort() is not out of the question, but chances are GDB is just
2984 a bit confused, not unusable. */
2985 #define err BPSTAT_WHAT_STOP_NOISY
2987 /* Given an old action and a class, come up with a new action. */
2988 /* One interesting property of this table is that wp_silent is the same
2989 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2990 after stopping, the check for whether to step over a breakpoint
2991 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2992 reference to how we stopped. We retain separate wp_silent and
2993 bp_silent codes in case we want to change that someday.
2995 Another possibly interesting property of this table is that
2996 there's a partial ordering, priority-like, of the actions. Once
2997 you've decided that some action is appropriate, you'll never go
2998 back and decide something of a lower priority is better. The
3001 kc < clr sgl shl shlr slr sn sr ss ts
3002 sgl < clrs shl shlr slr sn sr ss ts
3003 slr < err shl shlr sn sr ss ts
3004 clr < clrs err shl shlr sn sr ss ts
3005 clrs < err shl shlr sn sr ss ts
3006 ss < shl shlr sn sr ts
3013 What I think this means is that we don't need a damned table
3014 here. If you just put the rows and columns in the right order,
3015 it'd look awfully regular. We could simply walk the bpstat list
3016 and choose the highest priority action we find, with a little
3017 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
3018 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
3019 is messy anyway). */
3021 /* step_resume entries: a step resume breakpoint overrides another
3022 breakpoint of signal handling (see comment in wait_for_inferior
3023 at first PC_IN_SIGTRAMP where we set the step_resume breakpoint). */
3024 /* We handle the through_sigtramp_breakpoint the same way; having both
3025 one of those and a step_resume_breakpoint is probably very rare (?). */
3027 static const enum bpstat_what_main_action
3028 table
[(int) class_last
][(int) BPSTAT_WHAT_LAST
] =
3031 /* kc ss sn sgl slr clr clrs sr ts shl shlr
3034 {kc
, ss
, sn
, sgl
, slr
, clr
, clrs
, sr
, ts
, shl
, shlr
},
3036 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3038 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3040 {sgl
, ss
, sn
, sgl
, slr
, clrs
, clrs
, sr
, ts
, shl
, shlr
},
3042 {ss
, ss
, sn
, ss
, ss
, ss
, ss
, sr
, ts
, shl
, shlr
},
3044 {sn
, sn
, sn
, sn
, sn
, sn
, sn
, sr
, ts
, shl
, shlr
},
3046 {slr
, ss
, sn
, slr
, slr
, err
, err
, sr
, ts
, shl
, shlr
},
3048 {clr
, ss
, sn
, clrs
, err
, err
, err
, sr
, ts
, shl
, shlr
},
3050 {sr
, sr
, sr
, sr
, sr
, sr
, sr
, sr
, ts
, shl
, shlr
},
3052 {ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, ts
, shl
, shlr
},
3054 {shl
, shl
, shl
, shl
, shl
, shl
, shl
, shl
, ts
, shl
, shlr
},
3056 {shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, shlr
, ts
, shlr
, shlr
}
3071 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
3072 struct bpstat_what retval
;
3074 retval
.call_dummy
= 0;
3075 for (; bs
!= NULL
; bs
= bs
->next
)
3077 enum class bs_class
= no_effect
;
3078 if (bs
->breakpoint_at
== NULL
)
3079 /* I suspect this can happen if it was a momentary breakpoint
3080 which has since been deleted. */
3082 switch (bs
->breakpoint_at
->type
)
3088 case bp_hardware_breakpoint
:
3094 bs_class
= bp_noisy
;
3096 bs_class
= bp_silent
;
3099 bs_class
= bp_nostop
;
3102 case bp_hardware_watchpoint
:
3103 case bp_read_watchpoint
:
3104 case bp_access_watchpoint
:
3108 bs_class
= wp_noisy
;
3110 bs_class
= wp_silent
;
3113 /* There was a watchpoint, but we're not stopping.
3114 This requires no further action. */
3115 bs_class
= no_effect
;
3118 bs_class
= long_jump
;
3120 case bp_longjmp_resume
:
3121 bs_class
= long_resume
;
3123 case bp_step_resume
:
3126 bs_class
= step_resume
;
3129 /* It is for the wrong frame. */
3130 bs_class
= bp_nostop
;
3132 case bp_through_sigtramp
:
3133 bs_class
= through_sig
;
3135 case bp_watchpoint_scope
:
3136 bs_class
= bp_nostop
;
3138 case bp_shlib_event
:
3139 bs_class
= shlib_event
;
3141 case bp_thread_event
:
3142 case bp_overlay_event
:
3143 bs_class
= bp_nostop
;
3146 case bp_catch_unload
:
3147 /* Only if this catchpoint triggered should we cause the
3148 step-out-of-dld behaviour. Otherwise, we ignore this
3151 bs_class
= catch_shlib_event
;
3153 bs_class
= no_effect
;
3156 case bp_catch_vfork
:
3161 bs_class
= bp_noisy
;
3163 bs_class
= bp_silent
;
3166 /* There was a catchpoint, but we're not stopping.
3167 This requires no further action. */
3168 bs_class
= no_effect
;
3170 case bp_catch_catch
:
3171 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_CATCH
)
3172 bs_class
= bp_nostop
;
3174 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3176 case bp_catch_throw
:
3177 if (!bs
->stop
|| CURRENT_EXCEPTION_KIND
!= EX_EVENT_THROW
)
3178 bs_class
= bp_nostop
;
3180 bs_class
= bs
->print
? bp_noisy
: bp_silent
;
3183 /* Make sure the action is stop (silent or noisy),
3184 so infrun.c pops the dummy frame. */
3185 bs_class
= bp_silent
;
3186 retval
.call_dummy
= 1;
3189 current_action
= table
[(int) bs_class
][(int) current_action
];
3191 retval
.main_action
= current_action
;
3195 /* Nonzero if we should step constantly (e.g. watchpoints on machines
3196 without hardware support). This isn't related to a specific bpstat,
3197 just to things like whether watchpoints are set. */
3200 bpstat_should_step (void)
3202 struct breakpoint
*b
;
3204 if (breakpoint_enabled (b
) && b
->type
== bp_watchpoint
)
3209 /* Nonzero if there are enabled hardware watchpoints. */
3211 bpstat_have_active_hw_watchpoints (void)
3213 struct bp_location
*bpt
;
3214 ALL_BP_LOCATIONS (bpt
)
3215 if (breakpoint_enabled (bpt
->owner
)
3217 && bpt
->loc_type
== bp_loc_hardware_watchpoint
)
3223 /* Given a bpstat that records zero or more triggered eventpoints, this
3224 function returns another bpstat which contains only the catchpoints
3225 on that first list, if any. */
3227 bpstat_get_triggered_catchpoints (bpstat ep_list
, bpstat
*cp_list
)
3229 struct bpstats root_bs
[1];
3230 bpstat bs
= root_bs
;
3231 struct breakpoint
*ep
;
3234 bpstat_clear (cp_list
);
3235 root_bs
->next
= NULL
;
3237 for (; ep_list
!= NULL
; ep_list
= ep_list
->next
)
3239 /* Is this eventpoint a catchpoint? If not, ignore it. */
3240 ep
= ep_list
->breakpoint_at
;
3243 if ((ep
->type
!= bp_catch_load
) &&
3244 (ep
->type
!= bp_catch_unload
) &&
3245 (ep
->type
!= bp_catch_catch
) &&
3246 (ep
->type
!= bp_catch_throw
))
3247 /* pai: (temp) ADD fork/vfork here!! */
3250 /* Yes; add it to the list. */
3251 bs
= bpstat_alloc (ep
, bs
);
3256 #if defined(SOLIB_ADD)
3257 /* Also, for each triggered catchpoint, tag it with the name of
3258 the library that caused this trigger. (We copy the name now,
3259 because it's only guaranteed to be available NOW, when the
3260 catchpoint triggers. Clients who may wish to know the name
3261 later must get it from the catchpoint itself.) */
3262 if (ep
->triggered_dll_pathname
!= NULL
)
3263 xfree (ep
->triggered_dll_pathname
);
3264 if (ep
->type
== bp_catch_load
)
3265 dll_pathname
= SOLIB_LOADED_LIBRARY_PATHNAME (
3266 PIDGET (inferior_ptid
));
3268 dll_pathname
= SOLIB_UNLOADED_LIBRARY_PATHNAME (
3269 PIDGET (inferior_ptid
));
3271 dll_pathname
= NULL
;
3275 ep
->triggered_dll_pathname
= (char *)
3276 xmalloc (strlen (dll_pathname
) + 1);
3277 strcpy (ep
->triggered_dll_pathname
, dll_pathname
);
3280 ep
->triggered_dll_pathname
= NULL
;
3286 /* Print B to gdb_stdout. */
3288 print_one_breakpoint (struct breakpoint
*b
,
3289 CORE_ADDR
*last_addr
)
3291 struct command_line
*l
;
3293 struct ep_type_description
3298 static struct ep_type_description bptypes
[] =
3300 {bp_none
, "?deleted?"},
3301 {bp_breakpoint
, "breakpoint"},
3302 {bp_hardware_breakpoint
, "hw breakpoint"},
3303 {bp_until
, "until"},
3304 {bp_finish
, "finish"},
3305 {bp_watchpoint
, "watchpoint"},
3306 {bp_hardware_watchpoint
, "hw watchpoint"},
3307 {bp_read_watchpoint
, "read watchpoint"},
3308 {bp_access_watchpoint
, "acc watchpoint"},
3309 {bp_longjmp
, "longjmp"},
3310 {bp_longjmp_resume
, "longjmp resume"},
3311 {bp_step_resume
, "step resume"},
3312 {bp_through_sigtramp
, "sigtramp"},
3313 {bp_watchpoint_scope
, "watchpoint scope"},
3314 {bp_call_dummy
, "call dummy"},
3315 {bp_shlib_event
, "shlib events"},
3316 {bp_thread_event
, "thread events"},
3317 {bp_overlay_event
, "overlay events"},
3318 {bp_catch_load
, "catch load"},
3319 {bp_catch_unload
, "catch unload"},
3320 {bp_catch_fork
, "catch fork"},
3321 {bp_catch_vfork
, "catch vfork"},
3322 {bp_catch_exec
, "catch exec"},
3323 {bp_catch_catch
, "catch catch"},
3324 {bp_catch_throw
, "catch throw"}
3327 static char *bpdisps
[] =
3328 {"del", "dstp", "dis", "keep"};
3329 static char bpenables
[] = "nynny";
3330 char wrap_indent
[80];
3331 struct ui_stream
*stb
= ui_out_stream_new (uiout
);
3332 struct cleanup
*old_chain
= make_cleanup_ui_out_stream_delete (stb
);
3333 struct cleanup
*bkpt_chain
;
3336 bkpt_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "bkpt");
3340 ui_out_field_int (uiout
, "number", b
->number
);
3344 if (((int) b
->type
> (sizeof (bptypes
) / sizeof (bptypes
[0])))
3345 || ((int) b
->type
!= bptypes
[(int) b
->type
].type
))
3346 internal_error (__FILE__
, __LINE__
,
3347 "bptypes table does not describe type #%d.",
3349 ui_out_field_string (uiout
, "type", bptypes
[(int) b
->type
].description
);
3353 ui_out_field_string (uiout
, "disp", bpdisps
[(int) b
->disposition
]);
3357 ui_out_field_fmt (uiout
, "enabled", "%c", bpenables
[(int) b
->enable_state
]);
3358 ui_out_spaces (uiout
, 2);
3361 strcpy (wrap_indent
, " ");
3364 if (TARGET_ADDR_BIT
<= 32)
3365 strcat (wrap_indent
, " ");
3367 strcat (wrap_indent
, " ");
3370 if (b
->ops
!= NULL
&& b
->ops
->print_one
!= NULL
)
3371 b
->ops
->print_one (b
, last_addr
);
3376 internal_error (__FILE__
, __LINE__
,
3377 "print_one_breakpoint: bp_none encountered\n");
3381 case bp_hardware_watchpoint
:
3382 case bp_read_watchpoint
:
3383 case bp_access_watchpoint
:
3384 /* Field 4, the address, is omitted (which makes the columns
3385 not line up too nicely with the headers, but the effect
3386 is relatively readable). */
3388 ui_out_field_skip (uiout
, "addr");
3390 print_expression (b
->exp
, stb
->stream
);
3391 ui_out_field_stream (uiout
, "what", stb
);
3395 case bp_catch_unload
:
3396 /* Field 4, the address, is omitted (which makes the columns
3397 not line up too nicely with the headers, but the effect
3398 is relatively readable). */
3400 ui_out_field_skip (uiout
, "addr");
3402 if (b
->dll_pathname
== NULL
)
3404 ui_out_field_string (uiout
, "what", "<any library>");
3405 ui_out_spaces (uiout
, 1);
3409 ui_out_text (uiout
, "library \"");
3410 ui_out_field_string (uiout
, "what", b
->dll_pathname
);
3411 ui_out_text (uiout
, "\" ");
3416 case bp_catch_vfork
:
3417 /* Field 4, the address, is omitted (which makes the columns
3418 not line up too nicely with the headers, but the effect
3419 is relatively readable). */
3421 ui_out_field_skip (uiout
, "addr");
3423 if (b
->forked_inferior_pid
!= 0)
3425 ui_out_text (uiout
, "process ");
3426 ui_out_field_int (uiout
, "what", b
->forked_inferior_pid
);
3427 ui_out_spaces (uiout
, 1);
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 if (b
->exec_pathname
!= NULL
)
3439 ui_out_text (uiout
, "program \"");
3440 ui_out_field_string (uiout
, "what", b
->exec_pathname
);
3441 ui_out_text (uiout
, "\" ");
3445 case bp_catch_catch
:
3446 /* Field 4, the address, is omitted (which makes the columns
3447 not line up too nicely with the headers, but the effect
3448 is relatively readable). */
3450 ui_out_field_skip (uiout
, "addr");
3452 ui_out_field_string (uiout
, "what", "exception catch");
3453 ui_out_spaces (uiout
, 1);
3456 case bp_catch_throw
:
3457 /* Field 4, the address, is omitted (which makes the columns
3458 not line up too nicely with the headers, but the effect
3459 is relatively readable). */
3461 ui_out_field_skip (uiout
, "addr");
3463 ui_out_field_string (uiout
, "what", "exception throw");
3464 ui_out_spaces (uiout
, 1);
3468 case bp_hardware_breakpoint
:
3472 case bp_longjmp_resume
:
3473 case bp_step_resume
:
3474 case bp_through_sigtramp
:
3475 case bp_watchpoint_scope
:
3477 case bp_shlib_event
:
3478 case bp_thread_event
:
3479 case bp_overlay_event
:
3483 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
3486 *last_addr
= b
->loc
->address
;
3489 sym
= find_pc_sect_function (b
->loc
->address
, b
->loc
->section
);
3492 ui_out_text (uiout
, "in ");
3493 ui_out_field_string (uiout
, "func",
3494 SYMBOL_PRINT_NAME (sym
));
3495 ui_out_wrap_hint (uiout
, wrap_indent
);
3496 ui_out_text (uiout
, " at ");
3498 ui_out_field_string (uiout
, "file", b
->source_file
);
3499 ui_out_text (uiout
, ":");
3500 ui_out_field_int (uiout
, "line", b
->line_number
);
3504 print_address_symbolic (b
->loc
->address
, stb
->stream
, demangle
, "");
3505 ui_out_field_stream (uiout
, "at", stb
);
3510 if (b
->thread
!= -1)
3512 /* FIXME: This seems to be redundant and lost here; see the
3513 "stop only in" line a little further down. */
3514 ui_out_text (uiout
, " thread ");
3515 ui_out_field_int (uiout
, "thread", b
->thread
);
3518 ui_out_text (uiout
, "\n");
3520 if (frame_id_p (b
->frame_id
))
3523 ui_out_text (uiout
, "\tstop only in stack frame at ");
3524 /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
3526 ui_out_field_core_addr (uiout
, "frame", b
->frame_id
.stack_addr
);
3527 ui_out_text (uiout
, "\n");
3533 ui_out_text (uiout
, "\tstop only if ");
3534 print_expression (b
->cond
, stb
->stream
);
3535 ui_out_field_stream (uiout
, "cond", stb
);
3536 ui_out_text (uiout
, "\n");
3539 if (b
->thread
!= -1)
3541 /* FIXME should make an annotation for this */
3542 ui_out_text (uiout
, "\tstop only in thread ");
3543 ui_out_field_int (uiout
, "thread", b
->thread
);
3544 ui_out_text (uiout
, "\n");
3547 if (show_breakpoint_hit_counts
&& b
->hit_count
)
3549 /* FIXME should make an annotation for this */
3550 if (ep_is_catchpoint (b
))
3551 ui_out_text (uiout
, "\tcatchpoint");
3553 ui_out_text (uiout
, "\tbreakpoint");
3554 ui_out_text (uiout
, " already hit ");
3555 ui_out_field_int (uiout
, "times", b
->hit_count
);
3556 if (b
->hit_count
== 1)
3557 ui_out_text (uiout
, " time\n");
3559 ui_out_text (uiout
, " times\n");
3562 /* Output the count also if it is zero, but only if this is
3563 mi. FIXME: Should have a better test for this. */
3564 if (ui_out_is_mi_like_p (uiout
))
3565 if (show_breakpoint_hit_counts
&& b
->hit_count
== 0)
3566 ui_out_field_int (uiout
, "times", b
->hit_count
);
3568 if (b
->ignore_count
)
3571 ui_out_text (uiout
, "\tignore next ");
3572 ui_out_field_int (uiout
, "ignore", b
->ignore_count
);
3573 ui_out_text (uiout
, " hits\n");
3576 if ((l
= b
->commands
))
3578 struct cleanup
*script_chain
;
3581 script_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "script");
3582 print_command_lines (uiout
, l
, 4);
3583 do_cleanups (script_chain
);
3585 do_cleanups (bkpt_chain
);
3586 do_cleanups (old_chain
);
3589 struct captured_breakpoint_query_args
3595 do_captured_breakpoint_query (struct ui_out
*uiout
, void *data
)
3597 struct captured_breakpoint_query_args
*args
= data
;
3598 struct breakpoint
*b
;
3599 CORE_ADDR dummy_addr
= 0;
3602 if (args
->bnum
== b
->number
)
3604 print_one_breakpoint (b
, &dummy_addr
);
3612 gdb_breakpoint_query (struct ui_out
*uiout
, int bnum
)
3614 struct captured_breakpoint_query_args args
;
3616 /* For the moment we don't trust print_one_breakpoint() to not throw
3618 return catch_exceptions (uiout
, do_captured_breakpoint_query
, &args
,
3619 NULL
, RETURN_MASK_ALL
);
3622 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3623 catchpoints, et.al.). */
3626 user_settable_breakpoint (const struct breakpoint
*b
)
3628 return (b
->type
== bp_breakpoint
3629 || b
->type
== bp_catch_load
3630 || b
->type
== bp_catch_unload
3631 || b
->type
== bp_catch_fork
3632 || b
->type
== bp_catch_vfork
3633 || b
->type
== bp_catch_exec
3634 || b
->type
== bp_catch_catch
3635 || b
->type
== bp_catch_throw
3636 || b
->type
== bp_hardware_breakpoint
3637 || b
->type
== bp_watchpoint
3638 || b
->type
== bp_read_watchpoint
3639 || b
->type
== bp_access_watchpoint
3640 || b
->type
== bp_hardware_watchpoint
);
3643 /* Print information on user settable breakpoint (watchpoint, etc)
3644 number BNUM. If BNUM is -1 print all user settable breakpoints.
3645 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3648 breakpoint_1 (int bnum
, int allflag
)
3650 struct breakpoint
*b
;
3651 CORE_ADDR last_addr
= (CORE_ADDR
) -1;
3652 int nr_printable_breakpoints
;
3653 struct cleanup
*bkpttbl_chain
;
3655 /* Compute the number of rows in the table. */
3656 nr_printable_breakpoints
= 0;
3659 || bnum
== b
->number
)
3661 if (allflag
|| user_settable_breakpoint (b
))
3662 nr_printable_breakpoints
++;
3667 = make_cleanup_ui_out_table_begin_end (uiout
, 6, nr_printable_breakpoints
,
3671 = make_cleanup_ui_out_table_begin_end (uiout
, 5, nr_printable_breakpoints
,
3674 if (nr_printable_breakpoints
> 0)
3675 annotate_breakpoints_headers ();
3676 if (nr_printable_breakpoints
> 0)
3678 ui_out_table_header (uiout
, 3, ui_left
, "number", "Num"); /* 1 */
3679 if (nr_printable_breakpoints
> 0)
3681 ui_out_table_header (uiout
, 14, ui_left
, "type", "Type"); /* 2 */
3682 if (nr_printable_breakpoints
> 0)
3684 ui_out_table_header (uiout
, 4, ui_left
, "disp", "Disp"); /* 3 */
3685 if (nr_printable_breakpoints
> 0)
3687 ui_out_table_header (uiout
, 3, ui_left
, "enabled", "Enb"); /* 4 */
3690 if (nr_printable_breakpoints
> 0)
3692 if (TARGET_ADDR_BIT
<= 32)
3693 ui_out_table_header (uiout
, 10, ui_left
, "addr", "Address");/* 5 */
3695 ui_out_table_header (uiout
, 18, ui_left
, "addr", "Address");/* 5 */
3697 if (nr_printable_breakpoints
> 0)
3699 ui_out_table_header (uiout
, 40, ui_noalign
, "what", "What"); /* 6 */
3700 ui_out_table_body (uiout
);
3701 if (nr_printable_breakpoints
> 0)
3702 annotate_breakpoints_table ();
3706 || bnum
== b
->number
)
3708 /* We only print out user settable breakpoints unless the
3710 if (allflag
|| user_settable_breakpoint (b
))
3711 print_one_breakpoint (b
, &last_addr
);
3714 do_cleanups (bkpttbl_chain
);
3716 if (nr_printable_breakpoints
== 0)
3719 ui_out_message (uiout
, 0, "No breakpoints or watchpoints.\n");
3721 ui_out_message (uiout
, 0, "No breakpoint or watchpoint number %d.\n",
3726 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3727 that a comparison of an unsigned with -1 is always false. */
3728 if (last_addr
!= (CORE_ADDR
) -1)
3729 set_next_address (last_addr
);
3732 /* FIXME? Should this be moved up so that it is only called when
3733 there have been breakpoints? */
3734 annotate_breakpoints_table_end ();
3738 breakpoints_info (char *bnum_exp
, int from_tty
)
3743 bnum
= parse_and_eval_long (bnum_exp
);
3745 breakpoint_1 (bnum
, 0);
3749 maintenance_info_breakpoints (char *bnum_exp
, int from_tty
)
3754 bnum
= parse_and_eval_long (bnum_exp
);
3756 breakpoint_1 (bnum
, 1);
3759 /* Print a message describing any breakpoints set at PC. */
3762 describe_other_breakpoints (CORE_ADDR pc
, asection
*section
)
3765 struct breakpoint
*b
;
3768 if (b
->loc
->address
== pc
) /* address match / overlay match */
3769 if (!overlay_debugging
|| b
->loc
->section
== section
)
3773 printf_filtered ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
3775 if (b
->loc
->address
== pc
) /* address match / overlay match */
3776 if (!overlay_debugging
|| b
->loc
->section
== section
)
3779 printf_filtered ("%d%s%s ",
3781 ((b
->enable_state
== bp_disabled
||
3782 b
->enable_state
== bp_shlib_disabled
||
3783 b
->enable_state
== bp_call_disabled
)
3785 : b
->enable_state
== bp_permanent
3789 : ((others
== 1) ? " and" : ""));
3791 printf_filtered ("also set at pc ");
3792 print_address_numeric (pc
, 1, gdb_stdout
);
3793 printf_filtered (".\n");
3797 /* Set the default place to put a breakpoint
3798 for the `break' command with no arguments. */
3801 set_default_breakpoint (int valid
, CORE_ADDR addr
, struct symtab
*symtab
,
3804 default_breakpoint_valid
= valid
;
3805 default_breakpoint_address
= addr
;
3806 default_breakpoint_symtab
= symtab
;
3807 default_breakpoint_line
= line
;
3810 /* Return true iff it is meaningful to use the address member of
3811 BPT. For some breakpoint types, the address member is irrelevant
3812 and it makes no sense to attempt to compare it to other addresses
3813 (or use it for any other purpose either).
3815 More specifically, each of the following breakpoint types will always
3816 have a zero valued address and we don't want check_duplicates() to mark
3817 breakpoints of any of these types to be a duplicate of an actual
3818 breakpoint at address zero:
3821 bp_hardware_watchpoint
3823 bp_access_watchpoint
3830 breakpoint_address_is_meaningful (struct breakpoint
*bpt
)
3832 enum bptype type
= bpt
->type
;
3834 return (type
!= bp_watchpoint
3835 && type
!= bp_hardware_watchpoint
3836 && type
!= bp_read_watchpoint
3837 && type
!= bp_access_watchpoint
3838 && type
!= bp_catch_exec
3839 && type
!= bp_longjmp_resume
3840 && type
!= bp_catch_fork
3841 && type
!= bp_catch_vfork
);
3844 /* Rescan breakpoints at the same address and section as BPT,
3845 marking the first one as "first" and any others as "duplicates".
3846 This is so that the bpt instruction is only inserted once.
3847 If we have a permanent breakpoint at the same place as BPT, make
3848 that one the official one, and the rest as duplicates. */
3851 check_duplicates (struct breakpoint
*bpt
)
3853 struct bp_location
*b
;
3855 struct bp_location
*perm_bp
= 0;
3856 CORE_ADDR address
= bpt
->loc
->address
;
3857 asection
*section
= bpt
->loc
->section
;
3859 if (! breakpoint_address_is_meaningful (bpt
))
3862 ALL_BP_LOCATIONS (b
)
3863 if (b
->owner
->enable_state
!= bp_disabled
3864 && b
->owner
->enable_state
!= bp_shlib_disabled
3865 && b
->owner
->enable_state
!= bp_call_disabled
3866 && b
->address
== address
/* address / overlay match */
3867 && (!overlay_debugging
|| b
->section
== section
)
3868 && breakpoint_address_is_meaningful (b
->owner
))
3870 /* Have we found a permanent breakpoint? */
3871 if (b
->owner
->enable_state
== bp_permanent
)
3878 b
->duplicate
= count
> 1;
3881 /* If we found a permanent breakpoint at this address, go over the
3882 list again and declare all the other breakpoints there to be the
3886 perm_bp
->duplicate
= 0;
3888 /* Permanent breakpoint should always be inserted. */
3889 if (! perm_bp
->inserted
)
3890 internal_error (__FILE__
, __LINE__
,
3891 "allegedly permanent breakpoint is not "
3892 "actually inserted");
3894 ALL_BP_LOCATIONS (b
)
3897 if (b
->owner
->enable_state
!= bp_disabled
3898 && b
->owner
->enable_state
!= bp_shlib_disabled
3899 && b
->owner
->enable_state
!= bp_call_disabled
3900 && b
->address
== address
/* address / overlay match */
3901 && (!overlay_debugging
|| b
->section
== section
)
3902 && breakpoint_address_is_meaningful (b
->owner
))
3905 internal_error (__FILE__
, __LINE__
,
3906 "another breakpoint was inserted on top of "
3907 "a permanent breakpoint");
3916 breakpoint_adjustment_warning (CORE_ADDR from_addr
, CORE_ADDR to_addr
,
3917 int bnum
, int have_bnum
)
3922 strcpy (astr1
, local_hex_string_custom ((unsigned long) from_addr
, "08l"));
3923 strcpy (astr2
, local_hex_string_custom ((unsigned long) to_addr
, "08l"));
3925 warning ("Breakpoint %d address previously adjusted from %s to %s.",
3926 bnum
, astr1
, astr2
);
3928 warning ("Breakpoint address adjusted from %s to %s.", astr1
, astr2
);
3931 /* Adjust a breakpoint's address to account for architectural constraints
3932 on breakpoint placement. Return the adjusted address. Note: Very
3933 few targets require this kind of adjustment. For most targets,
3934 this function is simply the identity function. */
3937 adjust_breakpoint_address (CORE_ADDR bpaddr
)
3939 if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch
))
3941 /* Very few targets need any kind of breakpoint adjustment. */
3946 CORE_ADDR adjusted_bpaddr
;
3948 /* Some targets have architectural constraints on the placement
3949 of breakpoint instructions. Obtain the adjusted address. */
3950 adjusted_bpaddr
= gdbarch_adjust_breakpoint_address (current_gdbarch
,
3953 /* An adjusted breakpoint address can significantly alter
3954 a user's expectations. Print a warning if an adjustment
3956 if (adjusted_bpaddr
!= bpaddr
)
3957 breakpoint_adjustment_warning (bpaddr
, adjusted_bpaddr
, 0, 0);
3959 return adjusted_bpaddr
;
3963 /* Allocate a struct bp_location. */
3965 static struct bp_location
*
3966 allocate_bp_location (struct breakpoint
*bpt
, enum bptype bp_type
)
3968 struct bp_location
*loc
, *loc_p
;
3970 loc
= xmalloc (sizeof (struct bp_location
));
3971 memset (loc
, 0, sizeof (*loc
));
3981 case bp_longjmp_resume
:
3982 case bp_step_resume
:
3983 case bp_through_sigtramp
:
3984 case bp_watchpoint_scope
:
3986 case bp_shlib_event
:
3987 case bp_thread_event
:
3988 case bp_overlay_event
:
3990 case bp_catch_unload
:
3991 loc
->loc_type
= bp_loc_software_breakpoint
;
3993 case bp_hardware_breakpoint
:
3994 loc
->loc_type
= bp_loc_hardware_breakpoint
;
3996 case bp_hardware_watchpoint
:
3997 case bp_read_watchpoint
:
3998 case bp_access_watchpoint
:
3999 loc
->loc_type
= bp_loc_hardware_watchpoint
;
4003 case bp_catch_vfork
:
4005 case bp_catch_catch
:
4006 case bp_catch_throw
:
4007 loc
->loc_type
= bp_loc_other
;
4010 internal_error (__FILE__
, __LINE__
, "unknown breakpoint type");
4013 /* Add this breakpoint to the end of the chain. */
4015 loc_p
= bp_location_chain
;
4017 bp_location_chain
= loc
;
4021 loc_p
= loc_p
->next
;
4028 /* set_raw_breakpoint() is a low level routine for allocating and
4029 partially initializing a breakpoint of type BPTYPE. The newly
4030 created breakpoint's address, section, source file name, and line
4031 number are provided by SAL. The newly created and partially
4032 initialized breakpoint is added to the breakpoint chain and
4033 is also returned as the value of this function.
4035 It is expected that the caller will complete the initialization of
4036 the newly created breakpoint struct as well as output any status
4037 information regarding the creation of a new breakpoint. In
4038 particular, set_raw_breakpoint() does NOT set the breakpoint
4039 number! Care should be taken to not allow an error() to occur
4040 prior to completing the initialization of the breakpoint. If this
4041 should happen, a bogus breakpoint will be left on the chain. */
4044 set_raw_breakpoint (struct symtab_and_line sal
, enum bptype bptype
)
4046 struct breakpoint
*b
, *b1
;
4048 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
4049 memset (b
, 0, sizeof (*b
));
4050 b
->loc
= allocate_bp_location (b
, bptype
);
4051 b
->loc
->requested_address
= sal
.pc
;
4052 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
);
4053 if (sal
.symtab
== NULL
)
4054 b
->source_file
= NULL
;
4056 b
->source_file
= savestring (sal
.symtab
->filename
,
4057 strlen (sal
.symtab
->filename
));
4058 b
->loc
->section
= sal
.section
;
4060 b
->language
= current_language
->la_language
;
4061 b
->input_radix
= input_radix
;
4063 b
->line_number
= sal
.line
;
4064 b
->enable_state
= bp_enabled
;
4067 b
->ignore_count
= 0;
4069 b
->frame_id
= null_frame_id
;
4070 b
->dll_pathname
= NULL
;
4071 b
->triggered_dll_pathname
= NULL
;
4072 b
->forked_inferior_pid
= 0;
4073 b
->exec_pathname
= NULL
;
4076 /* Add this breakpoint to the end of the chain
4077 so that a list of breakpoints will come out in order
4078 of increasing numbers. */
4080 b1
= breakpoint_chain
;
4082 breakpoint_chain
= b
;
4090 check_duplicates (b
);
4091 breakpoints_changed ();
4097 /* Note that the breakpoint object B describes a permanent breakpoint
4098 instruction, hard-wired into the inferior's code. */
4100 make_breakpoint_permanent (struct breakpoint
*b
)
4102 b
->enable_state
= bp_permanent
;
4104 /* By definition, permanent breakpoints are already present in the code. */
4105 b
->loc
->inserted
= 1;
4108 static struct breakpoint
*
4109 create_internal_breakpoint (CORE_ADDR address
, enum bptype type
)
4111 static int internal_breakpoint_number
= -1;
4112 struct symtab_and_line sal
;
4113 struct breakpoint
*b
;
4115 init_sal (&sal
); /* initialize to zeroes */
4118 sal
.section
= find_pc_overlay (sal
.pc
);
4120 b
= set_raw_breakpoint (sal
, type
);
4121 b
->number
= internal_breakpoint_number
--;
4122 b
->disposition
= disp_donttouch
;
4129 create_longjmp_breakpoint (char *func_name
)
4131 struct breakpoint
*b
;
4132 struct minimal_symbol
*m
;
4134 if (func_name
== NULL
)
4135 b
= create_internal_breakpoint (0, bp_longjmp_resume
);
4138 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4141 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
), bp_longjmp
);
4144 b
->enable_state
= bp_disabled
;
4147 b
->addr_string
= xstrdup (func_name
);
4150 /* Call this routine when stepping and nexting to enable a breakpoint
4151 if we do a longjmp(). When we hit that breakpoint, call
4152 set_longjmp_resume_breakpoint() to figure out where we are going. */
4155 enable_longjmp_breakpoint (void)
4157 struct breakpoint
*b
;
4160 if (b
->type
== bp_longjmp
)
4162 b
->enable_state
= bp_enabled
;
4163 check_duplicates (b
);
4168 disable_longjmp_breakpoint (void)
4170 struct breakpoint
*b
;
4173 if (b
->type
== bp_longjmp
4174 || b
->type
== bp_longjmp_resume
)
4176 b
->enable_state
= bp_disabled
;
4177 check_duplicates (b
);
4182 create_overlay_event_breakpoint (char *func_name
)
4184 struct breakpoint
*b
;
4185 struct minimal_symbol
*m
;
4187 if ((m
= lookup_minimal_symbol_text (func_name
, NULL
)) == NULL
)
4190 b
= create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m
),
4192 b
->addr_string
= xstrdup (func_name
);
4194 if (overlay_debugging
== ovly_auto
)
4196 b
->enable_state
= bp_enabled
;
4197 overlay_events_enabled
= 1;
4201 b
->enable_state
= bp_disabled
;
4202 overlay_events_enabled
= 0;
4207 enable_overlay_breakpoints (void)
4209 struct breakpoint
*b
;
4212 if (b
->type
== bp_overlay_event
)
4214 b
->enable_state
= bp_enabled
;
4215 check_duplicates (b
);
4216 overlay_events_enabled
= 1;
4221 disable_overlay_breakpoints (void)
4223 struct breakpoint
*b
;
4226 if (b
->type
== bp_overlay_event
)
4228 b
->enable_state
= bp_disabled
;
4229 check_duplicates (b
);
4230 overlay_events_enabled
= 0;
4235 create_thread_event_breakpoint (CORE_ADDR address
)
4237 struct breakpoint
*b
;
4239 b
= create_internal_breakpoint (address
, bp_thread_event
);
4241 b
->enable_state
= bp_enabled
;
4242 /* addr_string has to be used or breakpoint_re_set will delete me. */
4243 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->loc
->address
));
4249 remove_thread_event_breakpoints (void)
4251 struct breakpoint
*b
, *temp
;
4253 ALL_BREAKPOINTS_SAFE (b
, temp
)
4254 if (b
->type
== bp_thread_event
)
4255 delete_breakpoint (b
);
4260 remove_solib_event_breakpoints (void)
4262 struct breakpoint
*b
, *temp
;
4264 ALL_BREAKPOINTS_SAFE (b
, temp
)
4265 if (b
->type
== bp_shlib_event
)
4266 delete_breakpoint (b
);
4270 create_solib_event_breakpoint (CORE_ADDR address
)
4272 struct breakpoint
*b
;
4274 b
= create_internal_breakpoint (address
, bp_shlib_event
);
4278 /* Disable any breakpoints that are on code in shared libraries. Only
4279 apply to enabled breakpoints, disabled ones can just stay disabled. */
4282 disable_breakpoints_in_shlibs (int silent
)
4284 struct breakpoint
*b
;
4285 int disabled_shlib_breaks
= 0;
4287 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4290 #if defined (PC_SOLIB)
4291 if (((b
->type
== bp_breakpoint
) ||
4292 (b
->type
== bp_hardware_breakpoint
)) &&
4293 breakpoint_enabled (b
) &&
4294 !b
->loc
->duplicate
&&
4295 PC_SOLIB (b
->loc
->address
))
4297 b
->enable_state
= bp_shlib_disabled
;
4300 if (!disabled_shlib_breaks
)
4302 target_terminal_ours_for_output ();
4303 warning ("Temporarily disabling shared library breakpoints:");
4305 disabled_shlib_breaks
= 1;
4306 warning ("breakpoint #%d ", b
->number
);
4313 /* Try to reenable any breakpoints in shared libraries. */
4315 re_enable_breakpoints_in_shlibs (void)
4317 struct breakpoint
*b
;
4320 if (b
->enable_state
== bp_shlib_disabled
)
4324 /* Do not reenable the breakpoint if the shared library
4325 is still not mapped in. */
4326 lib
= PC_SOLIB (b
->loc
->address
);
4327 if (lib
!= NULL
&& target_read_memory (b
->loc
->address
, buf
, 1) == 0)
4328 b
->enable_state
= bp_enabled
;
4335 solib_load_unload_1 (char *hookname
, int tempflag
, char *dll_pathname
,
4336 char *cond_string
, enum bptype bp_kind
)
4338 struct breakpoint
*b
;
4339 struct symtabs_and_lines sals
;
4340 struct cleanup
*old_chain
;
4341 struct cleanup
*canonical_strings_chain
= NULL
;
4342 char *addr_start
= hookname
;
4343 char *addr_end
= NULL
;
4344 char **canonical
= (char **) NULL
;
4345 int thread
= -1; /* All threads. */
4347 /* Set a breakpoint on the specified hook. */
4348 sals
= decode_line_1 (&hookname
, 1, (struct symtab
*) NULL
, 0, &canonical
, NULL
);
4349 addr_end
= hookname
;
4351 if (sals
.nelts
== 0)
4353 warning ("Unable to set a breakpoint on dynamic linker callback.");
4354 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4355 warning ("GDB will be unable to track shl_load/shl_unload calls");
4358 if (sals
.nelts
!= 1)
4360 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4361 warning ("GDB will be unable to track shl_load/shl_unload calls");
4365 /* Make sure that all storage allocated in decode_line_1 gets freed
4366 in case the following errors out. */
4367 old_chain
= make_cleanup (xfree
, sals
.sals
);
4368 if (canonical
!= (char **) NULL
)
4370 make_cleanup (xfree
, canonical
);
4371 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
4372 if (canonical
[0] != NULL
)
4373 make_cleanup (xfree
, canonical
[0]);
4376 resolve_sal_pc (&sals
.sals
[0]);
4378 /* Remove the canonical strings from the cleanup, they are needed below. */
4379 if (canonical
!= (char **) NULL
)
4380 discard_cleanups (canonical_strings_chain
);
4382 b
= set_raw_breakpoint (sals
.sals
[0], bp_kind
);
4383 set_breakpoint_count (breakpoint_count
+ 1);
4384 b
->number
= breakpoint_count
;
4386 b
->cond_string
= (cond_string
== NULL
) ?
4387 NULL
: savestring (cond_string
, strlen (cond_string
));
4390 if (canonical
!= (char **) NULL
&& canonical
[0] != NULL
)
4391 b
->addr_string
= canonical
[0];
4392 else if (addr_start
)
4393 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
4395 b
->enable_state
= bp_enabled
;
4396 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4398 if (dll_pathname
== NULL
)
4399 b
->dll_pathname
= NULL
;
4402 b
->dll_pathname
= (char *) xmalloc (strlen (dll_pathname
) + 1);
4403 strcpy (b
->dll_pathname
, dll_pathname
);
4407 do_cleanups (old_chain
);
4411 create_solib_load_event_breakpoint (char *hookname
, int tempflag
,
4412 char *dll_pathname
, char *cond_string
)
4414 solib_load_unload_1 (hookname
, tempflag
, dll_pathname
,
4415 cond_string
, bp_catch_load
);
4419 create_solib_unload_event_breakpoint (char *hookname
, int tempflag
,
4420 char *dll_pathname
, char *cond_string
)
4422 solib_load_unload_1 (hookname
,tempflag
, dll_pathname
,
4423 cond_string
, bp_catch_unload
);
4427 create_fork_vfork_event_catchpoint (int tempflag
, char *cond_string
,
4428 enum bptype bp_kind
)
4430 struct symtab_and_line sal
;
4431 struct breakpoint
*b
;
4432 int thread
= -1; /* All threads. */
4439 b
= set_raw_breakpoint (sal
, bp_kind
);
4440 set_breakpoint_count (breakpoint_count
+ 1);
4441 b
->number
= breakpoint_count
;
4443 b
->cond_string
= (cond_string
== NULL
) ?
4444 NULL
: savestring (cond_string
, strlen (cond_string
));
4446 b
->addr_string
= NULL
;
4447 b
->enable_state
= bp_enabled
;
4448 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4449 b
->forked_inferior_pid
= 0;
4455 create_fork_event_catchpoint (int tempflag
, char *cond_string
)
4457 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_fork
);
4461 create_vfork_event_catchpoint (int tempflag
, char *cond_string
)
4463 create_fork_vfork_event_catchpoint (tempflag
, cond_string
, bp_catch_vfork
);
4467 create_exec_event_catchpoint (int tempflag
, char *cond_string
)
4469 struct symtab_and_line sal
;
4470 struct breakpoint
*b
;
4471 int thread
= -1; /* All threads. */
4478 b
= set_raw_breakpoint (sal
, bp_catch_exec
);
4479 set_breakpoint_count (breakpoint_count
+ 1);
4480 b
->number
= breakpoint_count
;
4482 b
->cond_string
= (cond_string
== NULL
) ?
4483 NULL
: savestring (cond_string
, strlen (cond_string
));
4485 b
->addr_string
= NULL
;
4486 b
->enable_state
= bp_enabled
;
4487 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
4493 hw_breakpoint_used_count (void)
4495 struct breakpoint
*b
;
4500 if (b
->type
== bp_hardware_breakpoint
&& b
->enable_state
== bp_enabled
)
4508 hw_watchpoint_used_count (enum bptype type
, int *other_type_used
)
4510 struct breakpoint
*b
;
4513 *other_type_used
= 0;
4516 if (breakpoint_enabled (b
))
4518 if (b
->type
== type
)
4520 else if ((b
->type
== bp_hardware_watchpoint
||
4521 b
->type
== bp_read_watchpoint
||
4522 b
->type
== bp_access_watchpoint
))
4523 *other_type_used
= 1;
4529 /* Call this after hitting the longjmp() breakpoint. Use this to set
4530 a new breakpoint at the target of the jmp_buf.
4532 FIXME - This ought to be done by setting a temporary breakpoint
4533 that gets deleted automatically... */
4536 set_longjmp_resume_breakpoint (CORE_ADDR pc
, struct frame_id frame_id
)
4538 struct breakpoint
*b
;
4541 if (b
->type
== bp_longjmp_resume
)
4543 b
->loc
->requested_address
= pc
;
4544 b
->loc
->address
= adjust_breakpoint_address (b
->loc
->requested_address
);
4545 b
->enable_state
= bp_enabled
;
4546 b
->frame_id
= frame_id
;
4547 check_duplicates (b
);
4553 disable_watchpoints_before_interactive_call_start (void)
4555 struct breakpoint
*b
;
4559 if (((b
->type
== bp_watchpoint
)
4560 || (b
->type
== bp_hardware_watchpoint
)
4561 || (b
->type
== bp_read_watchpoint
)
4562 || (b
->type
== bp_access_watchpoint
)
4563 || ep_is_exception_catchpoint (b
))
4564 && breakpoint_enabled (b
))
4566 b
->enable_state
= bp_call_disabled
;
4567 check_duplicates (b
);
4573 enable_watchpoints_after_interactive_call_stop (void)
4575 struct breakpoint
*b
;
4579 if (((b
->type
== bp_watchpoint
)
4580 || (b
->type
== bp_hardware_watchpoint
)
4581 || (b
->type
== bp_read_watchpoint
)
4582 || (b
->type
== bp_access_watchpoint
)
4583 || ep_is_exception_catchpoint (b
))
4584 && (b
->enable_state
== bp_call_disabled
))
4586 b
->enable_state
= bp_enabled
;
4587 check_duplicates (b
);
4593 /* Set a breakpoint that will evaporate an end of command
4594 at address specified by SAL.
4595 Restrict it to frame FRAME if FRAME is nonzero. */
4598 set_momentary_breakpoint (struct symtab_and_line sal
, struct frame_id frame_id
,
4601 struct breakpoint
*b
;
4602 b
= set_raw_breakpoint (sal
, type
);
4603 b
->enable_state
= bp_enabled
;
4604 b
->disposition
= disp_donttouch
;
4605 b
->frame_id
= frame_id
;
4607 /* If we're debugging a multi-threaded program, then we
4608 want momentary breakpoints to be active in only a
4609 single thread of control. */
4610 if (in_thread_list (inferior_ptid
))
4611 b
->thread
= pid_to_thread_id (inferior_ptid
);
4617 /* Tell the user we have just set a breakpoint B. */
4620 mention (struct breakpoint
*b
)
4623 struct cleanup
*old_chain
, *ui_out_chain
;
4624 struct ui_stream
*stb
;
4626 stb
= ui_out_stream_new (uiout
);
4627 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
4629 /* FIXME: This is misplaced; mention() is called by things (like hitting a
4630 watchpoint) other than breakpoint creation. It should be possible to
4631 clean this up and at the same time replace the random calls to
4632 breakpoint_changed with this hook, as has already been done for
4633 delete_breakpoint_hook and so on. */
4634 if (create_breakpoint_hook
)
4635 create_breakpoint_hook (b
);
4636 breakpoint_create_event (b
->number
);
4638 if (b
->ops
!= NULL
&& b
->ops
->print_mention
!= NULL
)
4639 b
->ops
->print_mention (b
);
4644 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b
->number
);
4647 ui_out_text (uiout
, "Watchpoint ");
4648 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4649 ui_out_field_int (uiout
, "number", b
->number
);
4650 ui_out_text (uiout
, ": ");
4651 print_expression (b
->exp
, stb
->stream
);
4652 ui_out_field_stream (uiout
, "exp", stb
);
4653 do_cleanups (ui_out_chain
);
4655 case bp_hardware_watchpoint
:
4656 ui_out_text (uiout
, "Hardware watchpoint ");
4657 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "wpt");
4658 ui_out_field_int (uiout
, "number", b
->number
);
4659 ui_out_text (uiout
, ": ");
4660 print_expression (b
->exp
, stb
->stream
);
4661 ui_out_field_stream (uiout
, "exp", stb
);
4662 do_cleanups (ui_out_chain
);
4664 case bp_read_watchpoint
:
4665 ui_out_text (uiout
, "Hardware read watchpoint ");
4666 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-rwpt");
4667 ui_out_field_int (uiout
, "number", b
->number
);
4668 ui_out_text (uiout
, ": ");
4669 print_expression (b
->exp
, stb
->stream
);
4670 ui_out_field_stream (uiout
, "exp", stb
);
4671 do_cleanups (ui_out_chain
);
4673 case bp_access_watchpoint
:
4674 ui_out_text (uiout
, "Hardware access (read/write) watchpoint ");
4675 ui_out_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "hw-awpt");
4676 ui_out_field_int (uiout
, "number", b
->number
);
4677 ui_out_text (uiout
, ": ");
4678 print_expression (b
->exp
, stb
->stream
);
4679 ui_out_field_stream (uiout
, "exp", stb
);
4680 do_cleanups (ui_out_chain
);
4683 if (ui_out_is_mi_like_p (uiout
))
4688 printf_filtered ("Breakpoint %d", b
->number
);
4691 case bp_hardware_breakpoint
:
4692 if (ui_out_is_mi_like_p (uiout
))
4697 printf_filtered ("Hardware assisted breakpoint %d", b
->number
);
4701 case bp_catch_unload
:
4702 printf_filtered ("Catchpoint %d (%s %s)",
4704 (b
->type
== bp_catch_load
) ? "load" : "unload",
4705 (b
->dll_pathname
!= NULL
) ?
4706 b
->dll_pathname
: "<any library>");
4709 case bp_catch_vfork
:
4710 printf_filtered ("Catchpoint %d (%s)",
4712 (b
->type
== bp_catch_fork
) ? "fork" : "vfork");
4715 printf_filtered ("Catchpoint %d (exec)",
4718 case bp_catch_catch
:
4719 case bp_catch_throw
:
4720 printf_filtered ("Catchpoint %d (%s)",
4722 (b
->type
== bp_catch_catch
) ? "catch" : "throw");
4728 case bp_longjmp_resume
:
4729 case bp_step_resume
:
4730 case bp_through_sigtramp
:
4732 case bp_watchpoint_scope
:
4733 case bp_shlib_event
:
4734 case bp_thread_event
:
4735 case bp_overlay_event
:
4741 if (addressprint
|| b
->source_file
== NULL
)
4743 printf_filtered (" at ");
4744 print_address_numeric (b
->loc
->address
, 1, gdb_stdout
);
4747 printf_filtered (": file %s, line %d.",
4748 b
->source_file
, b
->line_number
);
4750 do_cleanups (old_chain
);
4751 if (ui_out_is_mi_like_p (uiout
))
4753 printf_filtered ("\n");
4757 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4758 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4759 COND[i] and COND_STRING[i] values.
4761 NOTE: If the function succeeds, the caller is expected to cleanup
4762 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4763 array contents). If the function fails (error() is called), the
4764 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4765 COND and SALS arrays and each of those arrays contents. */
4768 create_breakpoints (struct symtabs_and_lines sals
, char **addr_string
,
4769 struct expression
**cond
, char **cond_string
,
4770 enum bptype type
, enum bpdisp disposition
,
4771 int thread
, int ignore_count
, int from_tty
)
4773 if (type
== bp_hardware_breakpoint
)
4775 int i
= hw_breakpoint_used_count ();
4776 int target_resources_ok
=
4777 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
4779 if (target_resources_ok
== 0)
4780 error ("No hardware breakpoint support in the target.");
4781 else if (target_resources_ok
< 0)
4782 error ("Hardware breakpoints used exceeds limit.");
4785 /* Now set all the breakpoints. */
4788 for (i
= 0; i
< sals
.nelts
; i
++)
4790 struct breakpoint
*b
;
4791 struct symtab_and_line sal
= sals
.sals
[i
];
4794 describe_other_breakpoints (sal
.pc
, sal
.section
);
4796 b
= set_raw_breakpoint (sal
, type
);
4797 set_breakpoint_count (breakpoint_count
+ 1);
4798 b
->number
= breakpoint_count
;
4802 b
->addr_string
= addr_string
[i
];
4804 /* addr_string has to be used or breakpoint_re_set will delete
4806 xasprintf (&b
->addr_string
, "*0x%s", paddr (b
->loc
->address
));
4807 b
->cond_string
= cond_string
[i
];
4808 b
->ignore_count
= ignore_count
;
4809 b
->enable_state
= bp_enabled
;
4810 b
->disposition
= disposition
;
4816 /* Parse ARG which is assumed to be a SAL specification possibly
4817 followed by conditionals. On return, SALS contains an array of SAL
4818 addresses found. ADDR_STRING contains a vector of (canonical)
4819 address strings. ARG points to the end of the SAL. */
4822 parse_breakpoint_sals (char **address
,
4823 struct symtabs_and_lines
*sals
,
4824 char ***addr_string
)
4826 char *addr_start
= *address
;
4827 *addr_string
= NULL
;
4828 /* If no arg given, or if first arg is 'if ', use the default
4830 if ((*address
) == NULL
4831 || (strncmp ((*address
), "if", 2) == 0 && isspace ((*address
)[2])))
4833 if (default_breakpoint_valid
)
4835 struct symtab_and_line sal
;
4836 init_sal (&sal
); /* initialize to zeroes */
4837 sals
->sals
= (struct symtab_and_line
*)
4838 xmalloc (sizeof (struct symtab_and_line
));
4839 sal
.pc
= default_breakpoint_address
;
4840 sal
.line
= default_breakpoint_line
;
4841 sal
.symtab
= default_breakpoint_symtab
;
4842 sal
.section
= find_pc_overlay (sal
.pc
);
4843 sals
->sals
[0] = sal
;
4847 error ("No default breakpoint address now.");
4851 /* Force almost all breakpoints to be in terms of the
4852 current_source_symtab (which is decode_line_1's default). This
4853 should produce the results we want almost all of the time while
4854 leaving default_breakpoint_* alone.
4855 ObjC: However, don't match an Objective-C method name which
4856 may have a '+' or '-' succeeded by a '[' */
4858 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
4860 if (default_breakpoint_valid
4862 || ((strchr ("+-", (*address
)[0]) != NULL
)
4863 && ((*address
)[1] != '['))))
4864 *sals
= decode_line_1 (address
, 1, default_breakpoint_symtab
,
4865 default_breakpoint_line
, addr_string
, NULL
);
4867 *sals
= decode_line_1 (address
, 1, (struct symtab
*) NULL
, 0, addr_string
, NULL
);
4869 /* For any SAL that didn't have a canonical string, fill one in. */
4870 if (sals
->nelts
> 0 && *addr_string
== NULL
)
4871 *addr_string
= xcalloc (sals
->nelts
, sizeof (char **));
4872 if (addr_start
!= (*address
))
4875 for (i
= 0; i
< sals
->nelts
; i
++)
4877 /* Add the string if not present. */
4878 if ((*addr_string
)[i
] == NULL
)
4879 (*addr_string
)[i
] = savestring (addr_start
, (*address
) - addr_start
);
4885 /* Convert each SAL into a real PC. Verify that the PC can be
4886 inserted as a breakpoint. If it can't throw an error. */
4889 breakpoint_sals_to_pc (struct symtabs_and_lines
*sals
,
4893 for (i
= 0; i
< sals
->nelts
; i
++)
4895 resolve_sal_pc (&sals
->sals
[i
]);
4897 /* It's possible for the PC to be nonzero, but still an illegal
4898 value on some targets.
4900 For example, on HP-UX if you start gdb, and before running the
4901 inferior you try to set a breakpoint on a shared library function
4902 "foo" where the inferior doesn't call "foo" directly but does
4903 pass its address to another function call, then we do find a
4904 minimal symbol for the "foo", but it's address is invalid.
4905 (Appears to be an index into a table that the loader sets up
4906 when the inferior is run.)
4908 Give the target a chance to bless sals.sals[i].pc before we
4909 try to make a breakpoint for it. */
4910 if (PC_REQUIRES_RUN_BEFORE_USE (sals
->sals
[i
].pc
))
4912 if (address
== NULL
)
4913 error ("Cannot break without a running program.");
4915 error ("Cannot break on %s without a running program.",
4921 /* Set a breakpoint according to ARG (function, linenum or *address)
4922 flag: first bit : 0 non-temporary, 1 temporary.
4923 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
4926 break_command_1 (char *arg
, int flag
, int from_tty
)
4928 int tempflag
, hardwareflag
;
4929 struct symtabs_and_lines sals
;
4930 struct expression
**cond
= 0;
4931 /* Pointers in arg to the start, and one past the end, of the
4933 char **cond_string
= (char **) NULL
;
4934 char *addr_start
= arg
;
4936 struct cleanup
*old_chain
;
4937 struct cleanup
*breakpoint_chain
= NULL
;
4940 int ignore_count
= 0;
4942 hardwareflag
= flag
& BP_HARDWAREFLAG
;
4943 tempflag
= flag
& BP_TEMPFLAG
;
4948 parse_breakpoint_sals (&arg
, &sals
, &addr_string
);
4953 /* Create a chain of things that always need to be cleaned up. */
4954 old_chain
= make_cleanup (null_cleanup
, 0);
4956 /* Make sure that all storage allocated to SALS gets freed. */
4957 make_cleanup (xfree
, sals
.sals
);
4959 /* Cleanup the addr_string array but not its contents. */
4960 make_cleanup (xfree
, addr_string
);
4962 /* Allocate space for all the cond expressions. */
4963 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
4964 make_cleanup (xfree
, cond
);
4966 /* Allocate space for all the cond strings. */
4967 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
4968 make_cleanup (xfree
, cond_string
);
4970 /* ----------------------------- SNIP -----------------------------
4971 Anything added to the cleanup chain beyond this point is assumed
4972 to be part of a breakpoint. If the breakpoint create succeeds
4973 then the memory is not reclaimed. */
4974 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
4976 /* Mark the contents of the addr_string for cleanup. These go on
4977 the breakpoint_chain and only occure if the breakpoint create
4979 for (i
= 0; i
< sals
.nelts
; i
++)
4981 if (addr_string
[i
] != NULL
)
4982 make_cleanup (xfree
, addr_string
[i
]);
4985 /* Resolve all line numbers to PC's and verify that the addresses
4986 are ok for the target. */
4987 breakpoint_sals_to_pc (&sals
, addr_start
);
4989 /* Verify that condition can be parsed, before setting any
4990 breakpoints. Allocate a separate condition expression for each
4992 thread
= -1; /* No specific thread yet */
4993 for (i
= 0; i
< sals
.nelts
; i
++)
5000 char *cond_start
= NULL
;
5001 char *cond_end
= NULL
;
5002 while (*tok
== ' ' || *tok
== '\t')
5007 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5010 toklen
= end_tok
- tok
;
5012 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5014 tok
= cond_start
= end_tok
+ 1;
5015 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
5016 make_cleanup (xfree
, cond
[i
]);
5018 cond_string
[i
] = savestring (cond_start
, cond_end
- cond_start
);
5019 make_cleanup (xfree
, cond_string
[i
]);
5021 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
5027 thread
= strtol (tok
, &tok
, 0);
5029 error ("Junk after thread keyword.");
5030 if (!valid_thread_id (thread
))
5031 error ("Unknown thread %d\n", thread
);
5034 error ("Junk at end of arguments.");
5038 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5039 hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
5040 tempflag
? disp_del
: disp_donttouch
,
5041 thread
, ignore_count
, from_tty
);
5045 warning ("Multiple breakpoints were set.");
5046 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5048 /* That's it. Discard the cleanups for data inserted into the
5050 discard_cleanups (breakpoint_chain
);
5051 /* But cleanup everything else. */
5052 do_cleanups (old_chain
);
5055 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
5056 linenum or *address) with COND and IGNORE_COUNT. */
5058 struct captured_breakpoint_args
5069 do_captured_breakpoint (void *data
)
5071 struct captured_breakpoint_args
*args
= data
;
5072 struct symtabs_and_lines sals
;
5073 struct expression
**cond
;
5074 struct cleanup
*old_chain
;
5075 struct cleanup
*breakpoint_chain
= NULL
;
5082 /* Parse the source and lines spec. Delay check that the expression
5083 didn't contain trailing garbage until after cleanups are in
5087 address_end
= args
->address
;
5089 parse_breakpoint_sals (&address_end
, &sals
, &addr_string
);
5094 /* Create a chain of things at always need to be cleaned up. */
5095 old_chain
= make_cleanup (null_cleanup
, 0);
5097 /* Always have a addr_string array, even if it is empty. */
5098 make_cleanup (xfree
, addr_string
);
5100 /* Make sure that all storage allocated to SALS gets freed. */
5101 make_cleanup (xfree
, sals
.sals
);
5103 /* Allocate space for all the cond expressions. */
5104 cond
= xcalloc (sals
.nelts
, sizeof (struct expression
*));
5105 make_cleanup (xfree
, cond
);
5107 /* Allocate space for all the cond strings. */
5108 cond_string
= xcalloc (sals
.nelts
, sizeof (char **));
5109 make_cleanup (xfree
, cond_string
);
5111 /* ----------------------------- SNIP -----------------------------
5112 Anything added to the cleanup chain beyond this point is assumed
5113 to be part of a breakpoint. If the breakpoint create goes
5114 through then that memory is not cleaned up. */
5115 breakpoint_chain
= make_cleanup (null_cleanup
, 0);
5117 /* Mark the contents of the addr_string for cleanup. These go on
5118 the breakpoint_chain and only occure if the breakpoint create
5120 for (i
= 0; i
< sals
.nelts
; i
++)
5122 if (addr_string
[i
] != NULL
)
5123 make_cleanup (xfree
, addr_string
[i
]);
5126 /* Wait until now before checking for garbage at the end of the
5127 address. That way cleanups can take care of freeing any
5129 if (*address_end
!= '\0')
5130 error ("Garbage %s following breakpoint address", address_end
);
5132 /* Resolve all line numbers to PC's. */
5133 breakpoint_sals_to_pc (&sals
, args
->address
);
5135 /* Verify that conditions can be parsed, before setting any
5137 for (i
= 0; i
< sals
.nelts
; i
++)
5139 if (args
->condition
!= NULL
)
5141 char *tok
= args
->condition
;
5142 cond
[i
] = parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
5144 error ("Garbage %s follows condition", tok
);
5145 make_cleanup (xfree
, cond
[i
]);
5146 cond_string
[i
] = xstrdup (args
->condition
);
5150 create_breakpoints (sals
, addr_string
, cond
, cond_string
,
5151 args
->hardwareflag
? bp_hardware_breakpoint
: bp_breakpoint
,
5152 args
->tempflag
? disp_del
: disp_donttouch
,
5153 args
->thread
, args
->ignore_count
, 0/*from-tty*/);
5155 /* That's it. Discard the cleanups for data inserted into the
5157 discard_cleanups (breakpoint_chain
);
5158 /* But cleanup everything else. */
5159 do_cleanups (old_chain
);
5164 gdb_breakpoint (char *address
, char *condition
,
5165 int hardwareflag
, int tempflag
,
5166 int thread
, int ignore_count
)
5168 struct captured_breakpoint_args args
;
5169 args
.address
= address
;
5170 args
.condition
= condition
;
5171 args
.hardwareflag
= hardwareflag
;
5172 args
.tempflag
= tempflag
;
5173 args
.thread
= thread
;
5174 args
.ignore_count
= ignore_count
;
5175 return catch_errors (do_captured_breakpoint
, &args
,
5176 NULL
, RETURN_MASK_ALL
);
5181 break_at_finish_at_depth_command_1 (char *arg
, int flag
, int from_tty
)
5183 struct frame_info
*frame
;
5184 CORE_ADDR low
, high
, selected_pc
= 0;
5185 char *extra_args
= NULL
;
5187 int extra_args_len
= 0, if_arg
= 0;
5190 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5193 if (default_breakpoint_valid
)
5195 if (deprecated_selected_frame
)
5197 selected_pc
= get_frame_pc (deprecated_selected_frame
);
5202 error ("No selected frame.");
5205 error ("No default breakpoint address now.");
5209 extra_args
= strchr (arg
, ' ');
5213 extra_args_len
= strlen (extra_args
);
5214 level_arg
= (char *) xmalloc (extra_args
- arg
);
5215 strncpy (level_arg
, arg
, extra_args
- arg
- 1);
5216 level_arg
[extra_args
- arg
- 1] = '\0';
5220 level_arg
= (char *) xmalloc (strlen (arg
) + 1);
5221 strcpy (level_arg
, arg
);
5224 frame
= parse_frame_specification (level_arg
);
5226 selected_pc
= get_frame_pc (frame
);
5233 extra_args_len
= strlen (arg
);
5238 if (find_pc_partial_function (selected_pc
, (char **) NULL
, &low
, &high
))
5242 addr_string
= xstrprintf ("*0x%s %s", paddr_nz (high
), extra_args
);
5244 addr_string
= xstrprintf ("*0x%s", paddr_nz (high
));
5245 break_command_1 (addr_string
, flag
, from_tty
);
5246 xfree (addr_string
);
5249 error ("No function contains the specified address");
5252 error ("Unable to set breakpoint at procedure exit");
5257 break_at_finish_command_1 (char *arg
, int flag
, int from_tty
)
5259 char *addr_string
, *break_string
, *beg_addr_string
;
5260 CORE_ADDR low
, high
;
5261 struct symtabs_and_lines sals
;
5262 struct symtab_and_line sal
;
5263 struct cleanup
*old_chain
;
5264 char *extra_args
= NULL
;
5265 int extra_args_len
= 0;
5269 (arg
[0] == 'i' && arg
[1] == 'f' && (arg
[2] == ' ' || arg
[2] == '\t')))
5271 if (default_breakpoint_valid
)
5273 if (deprecated_selected_frame
)
5275 addr_string
= xstrprintf ("*0x%s",
5276 paddr_nz (get_frame_pc (deprecated_selected_frame
)));
5281 error ("No selected frame.");
5284 error ("No default breakpoint address now.");
5288 addr_string
= (char *) xmalloc (strlen (arg
) + 1);
5289 strcpy (addr_string
, arg
);
5295 extra_args_len
= strlen (arg
);
5299 /* get the stuff after the function name or address */
5300 extra_args
= strchr (arg
, ' ');
5304 extra_args_len
= strlen (extra_args
);
5311 beg_addr_string
= addr_string
;
5312 sals
= decode_line_1 (&addr_string
, 1, (struct symtab
*) NULL
, 0,
5313 (char ***) NULL
, NULL
);
5315 xfree (beg_addr_string
);
5316 old_chain
= make_cleanup (xfree
, sals
.sals
);
5317 for (i
= 0; (i
< sals
.nelts
); i
++)
5320 if (find_pc_partial_function (sal
.pc
, (char **) NULL
, &low
, &high
))
5324 break_string
= xstrprintf ("*0x%s %s", paddr_nz (high
),
5327 break_string
= xstrprintf ("*0x%s", paddr_nz (high
));
5328 break_command_1 (break_string
, flag
, from_tty
);
5329 xfree (break_string
);
5332 error ("No function contains the specified address");
5336 warning ("Multiple breakpoints were set.\n");
5337 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5339 do_cleanups (old_chain
);
5343 /* Helper function for break_command_1 and disassemble_command. */
5346 resolve_sal_pc (struct symtab_and_line
*sal
)
5350 if (sal
->pc
== 0 && sal
->symtab
!= NULL
)
5352 if (!find_line_pc (sal
->symtab
, sal
->line
, &pc
))
5353 error ("No line %d in file \"%s\".",
5354 sal
->line
, sal
->symtab
->filename
);
5358 if (sal
->section
== 0 && sal
->symtab
!= NULL
)
5360 struct blockvector
*bv
;
5365 bv
= blockvector_for_pc_sect (sal
->pc
, 0, &index
, sal
->symtab
);
5368 b
= BLOCKVECTOR_BLOCK (bv
, index
);
5369 sym
= block_function (b
);
5372 fixup_symbol_section (sym
, sal
->symtab
->objfile
);
5373 sal
->section
= SYMBOL_BFD_SECTION (sym
);
5377 /* It really is worthwhile to have the section, so we'll just
5378 have to look harder. This case can be executed if we have
5379 line numbers but no functions (as can happen in assembly
5382 struct minimal_symbol
*msym
;
5384 msym
= lookup_minimal_symbol_by_pc (sal
->pc
);
5386 sal
->section
= SYMBOL_BFD_SECTION (msym
);
5393 break_command (char *arg
, int from_tty
)
5395 break_command_1 (arg
, 0, from_tty
);
5399 break_at_finish_command (char *arg
, int from_tty
)
5401 break_at_finish_command_1 (arg
, 0, from_tty
);
5405 break_at_finish_at_depth_command (char *arg
, int from_tty
)
5407 break_at_finish_at_depth_command_1 (arg
, 0, from_tty
);
5411 tbreak_command (char *arg
, int from_tty
)
5413 break_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5417 tbreak_at_finish_command (char *arg
, int from_tty
)
5419 break_at_finish_command_1 (arg
, BP_TEMPFLAG
, from_tty
);
5423 hbreak_command (char *arg
, int from_tty
)
5425 break_command_1 (arg
, BP_HARDWAREFLAG
, from_tty
);
5429 thbreak_command (char *arg
, int from_tty
)
5431 break_command_1 (arg
, (BP_TEMPFLAG
| BP_HARDWAREFLAG
), from_tty
);
5435 stop_command (char *arg
, int from_tty
)
5437 printf_filtered ("Specify the type of breakpoint to set.\n\
5438 Usage: stop in <function | address>\n\
5443 stopin_command (char *arg
, int from_tty
)
5447 if (arg
== (char *) NULL
)
5449 else if (*arg
!= '*')
5454 /* look for a ':'. If this is a line number specification, then
5455 say it is bad, otherwise, it should be an address or
5456 function/method name */
5457 while (*argptr
&& !hasColon
)
5459 hasColon
= (*argptr
== ':');
5464 badInput
= (*argptr
!= ':'); /* Not a class::method */
5466 badInput
= isdigit (*arg
); /* a simple line number */
5470 printf_filtered ("Usage: stop in <function | address>\n");
5472 break_command_1 (arg
, 0, from_tty
);
5476 stopat_command (char *arg
, int from_tty
)
5480 if (arg
== (char *) NULL
|| *arg
== '*') /* no line number */
5487 /* look for a ':'. If there is a '::' then get out, otherwise
5488 it is probably a line number. */
5489 while (*argptr
&& !hasColon
)
5491 hasColon
= (*argptr
== ':');
5496 badInput
= (*argptr
== ':'); /* we have class::method */
5498 badInput
= !isdigit (*arg
); /* not a line number */
5502 printf_filtered ("Usage: stop at <line>\n");
5504 break_command_1 (arg
, 0, from_tty
);
5507 /* accessflag: hw_write: watch write,
5508 hw_read: watch read,
5509 hw_access: watch access (read or write) */
5511 watch_command_1 (char *arg
, int accessflag
, int from_tty
)
5513 struct breakpoint
*b
;
5514 struct symtab_and_line sal
;
5515 struct expression
*exp
;
5516 struct block
*exp_valid_block
;
5517 struct value
*val
, *mark
;
5518 struct frame_info
*frame
;
5519 struct frame_info
*prev_frame
= NULL
;
5520 char *exp_start
= NULL
;
5521 char *exp_end
= NULL
;
5522 char *tok
, *end_tok
;
5524 char *cond_start
= NULL
;
5525 char *cond_end
= NULL
;
5526 struct expression
*cond
= NULL
;
5527 int i
, other_type_used
, target_resources_ok
= 0;
5528 enum bptype bp_type
;
5531 init_sal (&sal
); /* initialize to zeroes */
5533 /* Parse arguments. */
5534 innermost_block
= NULL
;
5536 exp
= parse_exp_1 (&arg
, 0, 0);
5538 exp_valid_block
= innermost_block
;
5539 mark
= value_mark ();
5540 val
= evaluate_expression (exp
);
5541 release_value (val
);
5542 if (VALUE_LAZY (val
))
5543 value_fetch_lazy (val
);
5546 while (*tok
== ' ' || *tok
== '\t')
5550 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
5553 toklen
= end_tok
- tok
;
5554 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
5556 tok
= cond_start
= end_tok
+ 1;
5557 cond
= parse_exp_1 (&tok
, 0, 0);
5561 error ("Junk at end of command.");
5563 if (accessflag
== hw_read
)
5564 bp_type
= bp_read_watchpoint
;
5565 else if (accessflag
== hw_access
)
5566 bp_type
= bp_access_watchpoint
;
5568 bp_type
= bp_hardware_watchpoint
;
5570 mem_cnt
= can_use_hardware_watchpoint (val
);
5571 if (mem_cnt
== 0 && bp_type
!= bp_hardware_watchpoint
)
5572 error ("Expression cannot be implemented with read/access watchpoint.");
5575 i
= hw_watchpoint_used_count (bp_type
, &other_type_used
);
5576 target_resources_ok
=
5577 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type
, i
+ mem_cnt
,
5579 if (target_resources_ok
== 0 && bp_type
!= bp_hardware_watchpoint
)
5580 error ("Target does not support this type of hardware watchpoint.");
5582 if (target_resources_ok
< 0 && bp_type
!= bp_hardware_watchpoint
)
5583 error ("Target can only support one kind of HW watchpoint at a time.");
5586 #if defined(HPUXHPPA)
5587 /* On HP-UX if you set a h/w
5588 watchpoint before the "run" command, the inferior dies with a e.g.,
5589 SIGILL once you start it. I initially believed this was due to a
5590 bad interaction between page protection traps and the initial
5591 startup sequence by the dynamic linker.
5593 However, I tried avoiding that by having HP-UX's implementation of
5594 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5595 yet, which forced slow watches before a "run" or "attach", and it
5596 still fails somewhere in the startup code.
5598 Until I figure out what's happening, I'm disallowing watches altogether
5599 before the "run" or "attach" command. We'll tell the user they must
5600 set watches after getting the program started. */
5601 if (!target_has_execution
)
5603 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5606 #endif /* HPUXHPPA */
5608 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5609 watchpoint could not be set. */
5610 if (!mem_cnt
|| target_resources_ok
<= 0)
5611 bp_type
= bp_watchpoint
;
5613 /* Now set up the breakpoint. */
5614 b
= set_raw_breakpoint (sal
, bp_type
);
5615 set_breakpoint_count (breakpoint_count
+ 1);
5616 b
->number
= breakpoint_count
;
5617 b
->disposition
= disp_donttouch
;
5619 b
->exp_valid_block
= exp_valid_block
;
5620 b
->exp_string
= savestring (exp_start
, exp_end
- exp_start
);
5624 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
5628 frame
= block_innermost_frame (exp_valid_block
);
5631 prev_frame
= get_prev_frame (frame
);
5632 b
->watchpoint_frame
= get_frame_id (frame
);
5636 memset (&b
->watchpoint_frame
, 0, sizeof (b
->watchpoint_frame
));
5639 /* If the expression is "local", then set up a "watchpoint scope"
5640 breakpoint at the point where we've left the scope of the watchpoint
5642 if (innermost_block
)
5646 struct breakpoint
*scope_breakpoint
;
5647 scope_breakpoint
= create_internal_breakpoint (get_frame_pc (prev_frame
),
5648 bp_watchpoint_scope
);
5650 scope_breakpoint
->enable_state
= bp_enabled
;
5652 /* Automatically delete the breakpoint when it hits. */
5653 scope_breakpoint
->disposition
= disp_del
;
5655 /* Only break in the proper frame (help with recursion). */
5656 scope_breakpoint
->frame_id
= get_frame_id (prev_frame
);
5658 /* Set the address at which we will stop. */
5659 scope_breakpoint
->loc
->requested_address
5660 = get_frame_pc (prev_frame
);
5661 scope_breakpoint
->loc
->address
5662 = adjust_breakpoint_address (scope_breakpoint
->loc
->requested_address
);
5664 /* The scope breakpoint is related to the watchpoint. We
5665 will need to act on them together. */
5666 b
->related_breakpoint
= scope_breakpoint
;
5669 value_free_to_mark (mark
);
5673 /* Return count of locations need to be watched and can be handled
5674 in hardware. If the watchpoint can not be handled
5675 in hardware return zero. */
5677 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
5678 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
5679 ((BYTE_SIZE) <= (DEPRECATED_REGISTER_SIZE))
5682 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5683 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5684 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5688 can_use_hardware_watchpoint (struct value
*v
)
5690 int found_memory_cnt
= 0;
5691 struct value
*head
= v
;
5693 /* Did the user specifically forbid us to use hardware watchpoints? */
5694 if (!can_use_hw_watchpoints
)
5697 /* Make sure that the value of the expression depends only upon
5698 memory contents, and values computed from them within GDB. If we
5699 find any register references or function calls, we can't use a
5700 hardware watchpoint.
5702 The idea here is that evaluating an expression generates a series
5703 of values, one holding the value of every subexpression. (The
5704 expression a*b+c has five subexpressions: a, b, a*b, c, and
5705 a*b+c.) GDB's values hold almost enough information to establish
5706 the criteria given above --- they identify memory lvalues,
5707 register lvalues, computed values, etcetera. So we can evaluate
5708 the expression, and then scan the chain of values that leaves
5709 behind to decide whether we can detect any possible change to the
5710 expression's final value using only hardware watchpoints.
5712 However, I don't think that the values returned by inferior
5713 function calls are special in any way. So this function may not
5714 notice that an expression involving an inferior function call
5715 can't be watched with hardware watchpoints. FIXME. */
5716 for (; v
; v
= v
->next
)
5718 if (VALUE_LVAL (v
) == lval_memory
)
5721 /* A lazy memory lvalue is one that GDB never needed to fetch;
5722 we either just used its address (e.g., `a' in `a.b') or
5723 we never needed it at all (e.g., `a' in `a,b'). */
5727 /* Ahh, memory we actually used! Check if we can cover
5728 it with hardware watchpoints. */
5729 struct type
*vtype
= check_typedef (VALUE_TYPE (v
));
5731 /* We only watch structs and arrays if user asked for it
5732 explicitly, never if they just happen to appear in a
5733 middle of some value chain. */
5735 || (TYPE_CODE (vtype
) != TYPE_CODE_STRUCT
5736 && TYPE_CODE (vtype
) != TYPE_CODE_ARRAY
))
5738 CORE_ADDR vaddr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
5739 int len
= TYPE_LENGTH (VALUE_TYPE (v
));
5741 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr
, len
))
5748 else if (v
->lval
!= not_lval
&& v
->modifiable
== 0)
5749 return 0; /* ??? What does this represent? */
5750 else if (v
->lval
== lval_register
)
5751 return 0; /* cannot watch a register with a HW watchpoint */
5754 /* The expression itself looks suitable for using a hardware
5755 watchpoint, but give the target machine a chance to reject it. */
5756 return found_memory_cnt
;
5760 watch_command_wrapper (char *arg
, int from_tty
)
5762 watch_command (arg
, from_tty
);
5766 watch_command (char *arg
, int from_tty
)
5768 watch_command_1 (arg
, hw_write
, from_tty
);
5772 rwatch_command_wrapper (char *arg
, int from_tty
)
5774 rwatch_command (arg
, from_tty
);
5778 rwatch_command (char *arg
, int from_tty
)
5780 watch_command_1 (arg
, hw_read
, from_tty
);
5784 awatch_command_wrapper (char *arg
, int from_tty
)
5786 awatch_command (arg
, from_tty
);
5790 awatch_command (char *arg
, int from_tty
)
5792 watch_command_1 (arg
, hw_access
, from_tty
);
5796 /* Helper routines for the until_command routine in infcmd.c. Here
5797 because it uses the mechanisms of breakpoints. */
5799 /* This function is called by fetch_inferior_event via the
5800 cmd_continuation pointer, to complete the until command. It takes
5801 care of cleaning up the temporary breakpoints set up by the until
5804 until_break_command_continuation (struct continuation_arg
*arg
)
5806 struct cleanup
*cleanups
;
5808 cleanups
= (struct cleanup
*) arg
->data
.pointer
;
5809 do_exec_cleanups (cleanups
);
5813 until_break_command (char *arg
, int from_tty
, int anywhere
)
5815 struct symtabs_and_lines sals
;
5816 struct symtab_and_line sal
;
5817 struct frame_info
*prev_frame
= get_prev_frame (deprecated_selected_frame
);
5818 struct breakpoint
*breakpoint
;
5819 struct cleanup
*old_chain
;
5820 struct continuation_arg
*arg1
;
5823 clear_proceed_status ();
5825 /* Set a breakpoint where the user wants it and at return from
5828 if (default_breakpoint_valid
)
5829 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
5830 default_breakpoint_line
, (char ***) NULL
, NULL
);
5832 sals
= decode_line_1 (&arg
, 1, (struct symtab
*) NULL
,
5833 0, (char ***) NULL
, NULL
);
5835 if (sals
.nelts
!= 1)
5836 error ("Couldn't get information on specified line.");
5839 xfree (sals
.sals
); /* malloc'd, so freed */
5842 error ("Junk at end of arguments.");
5844 resolve_sal_pc (&sal
);
5847 /* If the user told us to continue until a specified location,
5848 we don't specify a frame at which we need to stop. */
5849 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_until
);
5851 /* Otherwise, specify the current frame, because we want to stop only
5852 at the very same frame. */
5853 breakpoint
= set_momentary_breakpoint (sal
,
5854 get_frame_id (deprecated_selected_frame
),
5857 if (!event_loop_p
|| !target_can_async_p ())
5858 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
5860 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
5862 /* If we are running asynchronously, and the target supports async
5863 execution, we are not waiting for the target to stop, in the call
5864 tp proceed, below. This means that we cannot delete the
5865 brekpoints until the target has actually stopped. The only place
5866 where we get a chance to do that is in fetch_inferior_event, so
5867 we must set things up for that. */
5869 if (event_loop_p
&& target_can_async_p ())
5871 /* In this case the arg for the continuation is just the point
5872 in the exec_cleanups chain from where to start doing
5873 cleanups, because all the continuation does is the cleanups in
5874 the exec_cleanup_chain. */
5876 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
5878 arg1
->data
.pointer
= old_chain
;
5880 add_continuation (until_break_command_continuation
, arg1
);
5883 /* Keep within the current frame, or in frames called by the current
5887 sal
= find_pc_line (get_frame_pc (prev_frame
), 0);
5888 sal
.pc
= get_frame_pc (prev_frame
);
5889 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (prev_frame
),
5891 if (!event_loop_p
|| !target_can_async_p ())
5892 make_cleanup_delete_breakpoint (breakpoint
);
5894 make_exec_cleanup_delete_breakpoint (breakpoint
);
5897 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
5898 /* Do the cleanups now, anly if we are not running asynchronously,
5899 of if we are, but the target is still synchronous. */
5900 if (!event_loop_p
|| !target_can_async_p ())
5901 do_cleanups (old_chain
);
5905 /* These aren't used; I don't konw what they were for. */
5906 /* Set a breakpoint at the catch clause for NAME. */
5908 catch_breakpoint (char *name
)
5913 disable_catch_breakpoint (void)
5918 delete_catch_breakpoint (void)
5923 enable_catch_breakpoint (void)
5929 ep_skip_leading_whitespace (char **s
)
5931 if ((s
== NULL
) || (*s
== NULL
))
5933 while (isspace (**s
))
5937 /* This function examines a string, and attempts to find a token
5938 that might be an event name in the leading characters. If a
5939 possible match is found, a pointer to the last character of
5940 the token is returned. Else, NULL is returned. */
5943 ep_find_event_name_end (char *arg
)
5946 char *event_name_end
= NULL
;
5948 /* If we could depend upon the presense of strrpbrk, we'd use that... */
5952 /* We break out of the loop when we find a token delimiter.
5953 Basically, we're looking for alphanumerics and underscores;
5954 anything else delimites the token. */
5957 if (!isalnum (*s
) && (*s
!= '_'))
5963 return event_name_end
;
5967 /* This function attempts to parse an optional "if <cond>" clause
5968 from the arg string. If one is not found, it returns NULL.
5970 Else, it returns a pointer to the condition string. (It does not
5971 attempt to evaluate the string against a particular block.) And,
5972 it updates arg to point to the first character following the parsed
5973 if clause in the arg string. */
5976 ep_parse_optional_if_clause (char **arg
)
5980 if (((*arg
)[0] != 'i') || ((*arg
)[1] != 'f') || !isspace ((*arg
)[2]))
5983 /* Skip the "if" keyword. */
5986 /* Skip any extra leading whitespace, and record the start of the
5987 condition string. */
5988 ep_skip_leading_whitespace (arg
);
5991 /* Assume that the condition occupies the remainder of the arg string. */
5992 (*arg
) += strlen (cond_string
);
5997 /* This function attempts to parse an optional filename from the arg
5998 string. If one is not found, it returns NULL.
6000 Else, it returns a pointer to the parsed filename. (This function
6001 makes no attempt to verify that a file of that name exists, or is
6002 accessible.) And, it updates arg to point to the first character
6003 following the parsed filename in the arg string.
6005 Note that clients needing to preserve the returned filename for
6006 future access should copy it to their own buffers. */
6008 ep_parse_optional_filename (char **arg
)
6010 static char filename
[1024];
6015 if ((*arg_p
== '\0') || isspace (*arg_p
))
6033 /* Commands to deal with catching events, such as signals, exceptions,
6034 process start/exit, etc. */
6038 catch_fork
, catch_vfork
6042 #if defined(CHILD_INSERT_FORK_CATCHPOINT) || defined(CHILD_INSERT_VFORK_CATCHPOINT)
6043 static void catch_fork_command_1 (catch_fork_kind fork_kind
,
6044 char *arg
, int tempflag
, int from_tty
);
6047 catch_fork_command_1 (catch_fork_kind fork_kind
, char *arg
, int tempflag
,
6050 char *cond_string
= NULL
;
6052 ep_skip_leading_whitespace (&arg
);
6054 /* The allowed syntax is:
6056 catch [v]fork if <cond>
6058 First, check if there's an if clause. */
6059 cond_string
= ep_parse_optional_if_clause (&arg
);
6061 if ((*arg
!= '\0') && !isspace (*arg
))
6062 error ("Junk at end of arguments.");
6064 /* If this target supports it, create a fork or vfork catchpoint
6065 and enable reporting of such events. */
6069 create_fork_event_catchpoint (tempflag
, cond_string
);
6072 create_vfork_event_catchpoint (tempflag
, cond_string
);
6075 error ("unsupported or unknown fork kind; cannot catch it");
6081 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6083 catch_exec_command_1 (char *arg
, int tempflag
, int from_tty
)
6085 char *cond_string
= NULL
;
6087 ep_skip_leading_whitespace (&arg
);
6089 /* The allowed syntax is:
6091 catch exec if <cond>
6093 First, check if there's an if clause. */
6094 cond_string
= ep_parse_optional_if_clause (&arg
);
6096 if ((*arg
!= '\0') && !isspace (*arg
))
6097 error ("Junk at end of arguments.");
6099 /* If this target supports it, create an exec catchpoint
6100 and enable reporting of such events. */
6101 create_exec_event_catchpoint (tempflag
, cond_string
);
6105 #if defined(SOLIB_ADD)
6107 catch_load_command_1 (char *arg
, int tempflag
, int from_tty
)
6109 char *dll_pathname
= NULL
;
6110 char *cond_string
= NULL
;
6112 ep_skip_leading_whitespace (&arg
);
6114 /* The allowed syntax is:
6116 catch load if <cond>
6117 catch load <filename>
6118 catch load <filename> if <cond>
6120 The user is not allowed to specify the <filename> after an
6123 We'll ignore the pathological case of a file named "if".
6125 First, check if there's an if clause. If so, then there
6126 cannot be a filename. */
6127 cond_string
= ep_parse_optional_if_clause (&arg
);
6129 /* If there was an if clause, then there cannot be a filename.
6130 Else, there might be a filename and an if clause. */
6131 if (cond_string
== NULL
)
6133 dll_pathname
= ep_parse_optional_filename (&arg
);
6134 ep_skip_leading_whitespace (&arg
);
6135 cond_string
= ep_parse_optional_if_clause (&arg
);
6138 if ((*arg
!= '\0') && !isspace (*arg
))
6139 error ("Junk at end of arguments.");
6141 /* Create a load breakpoint that only triggers when a load of
6142 the specified dll (or any dll, if no pathname was specified)
6144 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6145 dll_pathname
, cond_string
);
6149 catch_unload_command_1 (char *arg
, int tempflag
, int from_tty
)
6151 char *dll_pathname
= NULL
;
6152 char *cond_string
= NULL
;
6154 ep_skip_leading_whitespace (&arg
);
6156 /* The allowed syntax is:
6158 catch unload if <cond>
6159 catch unload <filename>
6160 catch unload <filename> if <cond>
6162 The user is not allowed to specify the <filename> after an
6165 We'll ignore the pathological case of a file named "if".
6167 First, check if there's an if clause. If so, then there
6168 cannot be a filename. */
6169 cond_string
= ep_parse_optional_if_clause (&arg
);
6171 /* If there was an if clause, then there cannot be a filename.
6172 Else, there might be a filename and an if clause. */
6173 if (cond_string
== NULL
)
6175 dll_pathname
= ep_parse_optional_filename (&arg
);
6176 ep_skip_leading_whitespace (&arg
);
6177 cond_string
= ep_parse_optional_if_clause (&arg
);
6180 if ((*arg
!= '\0') && !isspace (*arg
))
6181 error ("Junk at end of arguments.");
6183 /* Create an unload breakpoint that only triggers when an unload of
6184 the specified dll (or any dll, if no pathname was specified)
6186 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid
), tempflag
,
6187 dll_pathname
, cond_string
);
6189 #endif /* SOLIB_ADD */
6191 /* Commands to deal with catching exceptions. */
6193 /* Set a breakpoint at the specified callback routine for an
6194 exception event callback */
6197 create_exception_catchpoint (int tempflag
, char *cond_string
,
6198 enum exception_event_kind ex_event
,
6199 struct symtab_and_line
*sal
)
6201 struct breakpoint
*b
;
6202 int thread
= -1; /* All threads. */
6205 if (!sal
) /* no exception support? */
6210 case EX_EVENT_THROW
:
6211 bptype
= bp_catch_throw
;
6213 case EX_EVENT_CATCH
:
6214 bptype
= bp_catch_catch
;
6216 default: /* error condition */
6217 error ("Internal error -- invalid catchpoint kind");
6220 b
= set_raw_breakpoint (*sal
, bptype
);
6221 set_breakpoint_count (breakpoint_count
+ 1);
6222 b
->number
= breakpoint_count
;
6224 b
->cond_string
= (cond_string
== NULL
) ?
6225 NULL
: savestring (cond_string
, strlen (cond_string
));
6227 b
->addr_string
= NULL
;
6228 b
->enable_state
= bp_enabled
;
6229 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6233 static enum print_stop_action
6234 print_exception_catchpoint (struct breakpoint
*b
)
6236 annotate_catchpoint (b
->number
);
6238 if (strstr (b
->addr_string
, "throw") != NULL
)
6239 printf_filtered ("\nCatchpoint %d (exception thrown)\n",
6242 printf_filtered ("\nCatchpoint %d (exception caught)\n",
6245 return PRINT_SRC_AND_LOC
;
6249 print_one_exception_catchpoint (struct breakpoint
*b
, CORE_ADDR
*last_addr
)
6254 ui_out_field_core_addr (uiout
, "addr", b
->loc
->address
);
6257 *last_addr
= b
->loc
->address
;
6258 if (strstr (b
->addr_string
, "throw") != NULL
)
6259 ui_out_field_string (uiout
, "what", "exception throw");
6261 ui_out_field_string (uiout
, "what", "exception catch");
6265 print_mention_exception_catchpoint (struct breakpoint
*b
)
6267 if (strstr (b
->addr_string
, "throw") != NULL
)
6268 printf_filtered ("Catchpoint %d (throw)", b
->number
);
6270 printf_filtered ("Catchpoint %d (catch)", b
->number
);
6273 static struct breakpoint_ops gnu_v3_exception_catchpoint_ops
= {
6274 print_exception_catchpoint
,
6275 print_one_exception_catchpoint
,
6276 print_mention_exception_catchpoint
6280 handle_gnu_v3_exceptions (int tempflag
, char *cond_string
,
6281 enum exception_event_kind ex_event
, int from_tty
)
6283 char *trigger_func_name
, *nameptr
;
6284 struct symtabs_and_lines sals
;
6285 struct breakpoint
*b
;
6287 if (ex_event
== EX_EVENT_CATCH
)
6288 trigger_func_name
= xstrdup ("__cxa_begin_catch");
6290 trigger_func_name
= xstrdup ("__cxa_throw");
6292 nameptr
= trigger_func_name
;
6293 sals
= decode_line_1 (&nameptr
, 1, NULL
, 0, NULL
, NULL
);
6294 if (sals
.nelts
== 0)
6296 xfree (trigger_func_name
);
6300 b
= set_raw_breakpoint (sals
.sals
[0], bp_breakpoint
);
6301 set_breakpoint_count (breakpoint_count
+ 1);
6302 b
->number
= breakpoint_count
;
6304 b
->cond_string
= (cond_string
== NULL
) ?
6305 NULL
: savestring (cond_string
, strlen (cond_string
));
6307 b
->addr_string
= trigger_func_name
;
6308 b
->enable_state
= bp_enabled
;
6309 b
->disposition
= tempflag
? disp_del
: disp_donttouch
;
6310 b
->ops
= &gnu_v3_exception_catchpoint_ops
;
6317 /* Deal with "catch catch" and "catch throw" commands */
6320 catch_exception_command_1 (enum exception_event_kind ex_event
, char *arg
,
6321 int tempflag
, int from_tty
)
6323 char *cond_string
= NULL
;
6324 struct symtab_and_line
*sal
= NULL
;
6326 ep_skip_leading_whitespace (&arg
);
6328 cond_string
= ep_parse_optional_if_clause (&arg
);
6330 if ((*arg
!= '\0') && !isspace (*arg
))
6331 error ("Junk at end of arguments.");
6333 if ((ex_event
!= EX_EVENT_THROW
) &&
6334 (ex_event
!= EX_EVENT_CATCH
))
6335 error ("Unsupported or unknown exception event; cannot catch it");
6337 if (handle_gnu_v3_exceptions (tempflag
, cond_string
, ex_event
, from_tty
))
6340 /* See if we can find a callback routine */
6341 sal
= target_enable_exception_callback (ex_event
, 1);
6345 /* We have callbacks from the runtime system for exceptions.
6346 Set a breakpoint on the sal found, if no errors */
6347 if (sal
!= (struct symtab_and_line
*) -1)
6348 create_exception_catchpoint (tempflag
, cond_string
, ex_event
, sal
);
6350 return; /* something went wrong with setting up callbacks */
6353 warning ("Unsupported with this platform/compiler combination.");
6356 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6357 inside a catch_errors */
6360 cover_target_enable_exception_callback (void *arg
)
6362 args_for_catchpoint_enable
*args
= arg
;
6363 struct symtab_and_line
*sal
;
6364 sal
= target_enable_exception_callback (args
->kind
, args
->enable_p
);
6367 else if (sal
== (struct symtab_and_line
*) -1)
6370 return 1; /*is valid */
6374 catch_command_1 (char *arg
, int tempflag
, int from_tty
)
6377 /* The first argument may be an event name, such as "start" or "load".
6378 If so, then handle it as such. If it doesn't match an event name,
6379 then attempt to interpret it as an exception name. (This latter is
6380 the v4.16-and-earlier GDB meaning of the "catch" command.)
6382 First, try to find the bounds of what might be an event name. */
6383 char *arg1_start
= arg
;
6387 if (arg1_start
== NULL
)
6389 /* Old behaviour was to use pre-v-4.16 syntax */
6390 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6392 /* Now, this is not allowed */
6393 error ("Catch requires an event name.");
6396 arg1_end
= ep_find_event_name_end (arg1_start
);
6397 if (arg1_end
== NULL
)
6398 error ("catch requires an event");
6399 arg1_length
= arg1_end
+ 1 - arg1_start
;
6401 /* Try to match what we found against known event names. */
6402 if (strncmp (arg1_start
, "signal", arg1_length
) == 0)
6404 error ("Catch of signal not yet implemented");
6406 else if (strncmp (arg1_start
, "catch", arg1_length
) == 0)
6408 catch_exception_command_1 (EX_EVENT_CATCH
, arg1_end
+ 1,
6409 tempflag
, from_tty
);
6411 else if (strncmp (arg1_start
, "throw", arg1_length
) == 0)
6413 catch_exception_command_1 (EX_EVENT_THROW
, arg1_end
+ 1,
6414 tempflag
, from_tty
);
6416 else if (strncmp (arg1_start
, "thread_start", arg1_length
) == 0)
6418 error ("Catch of thread_start not yet implemented");
6420 else if (strncmp (arg1_start
, "thread_exit", arg1_length
) == 0)
6422 error ("Catch of thread_exit not yet implemented");
6424 else if (strncmp (arg1_start
, "thread_join", arg1_length
) == 0)
6426 error ("Catch of thread_join not yet implemented");
6428 else if (strncmp (arg1_start
, "start", arg1_length
) == 0)
6430 error ("Catch of start not yet implemented");
6432 else if (strncmp (arg1_start
, "exit", arg1_length
) == 0)
6434 error ("Catch of exit not yet implemented");
6436 else if (strncmp (arg1_start
, "fork", arg1_length
) == 0)
6438 #if defined(CHILD_INSERT_FORK_CATCHPOINT)
6439 catch_fork_command_1 (catch_fork
, arg1_end
+ 1, tempflag
, from_tty
);
6441 error ("Catch of fork not yet implemented");
6444 else if (strncmp (arg1_start
, "vfork", arg1_length
) == 0)
6446 #if defined(CHILD_INSERT_VFORK_CATCHPOINT)
6447 catch_fork_command_1 (catch_vfork
, arg1_end
+ 1, tempflag
, from_tty
);
6449 error ("Catch of vfork not yet implemented");
6452 else if (strncmp (arg1_start
, "exec", arg1_length
) == 0)
6454 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6455 catch_exec_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6457 error ("Catch of exec not yet implemented");
6460 else if (strncmp (arg1_start
, "load", arg1_length
) == 0)
6462 #if defined(SOLIB_ADD)
6463 catch_load_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6465 error ("Catch of load not implemented");
6468 else if (strncmp (arg1_start
, "unload", arg1_length
) == 0)
6470 #if defined(SOLIB_ADD)
6471 catch_unload_command_1 (arg1_end
+ 1, tempflag
, from_tty
);
6473 error ("Catch of load not implemented");
6476 else if (strncmp (arg1_start
, "stop", arg1_length
) == 0)
6478 error ("Catch of stop not yet implemented");
6481 /* This doesn't appear to be an event name */
6485 /* Pre-v.4.16 behaviour was to treat the argument
6486 as the name of an exception */
6487 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6488 /* Now this is not allowed */
6489 error ("Unknown event kind specified for catch");
6494 /* Used by the gui, could be made a worker for other things. */
6497 set_breakpoint_sal (struct symtab_and_line sal
)
6499 struct breakpoint
*b
;
6500 b
= set_raw_breakpoint (sal
, bp_breakpoint
);
6501 set_breakpoint_count (breakpoint_count
+ 1);
6502 b
->number
= breakpoint_count
;
6509 /* These aren't used; I don't know what they were for. */
6510 /* Disable breakpoints on all catch clauses described in ARGS. */
6512 disable_catch (char *args
)
6514 /* Map the disable command to catch clauses described in ARGS. */
6517 /* Enable breakpoints on all catch clauses described in ARGS. */
6519 enable_catch (char *args
)
6521 /* Map the disable command to catch clauses described in ARGS. */
6524 /* Delete breakpoints on all catch clauses in the active scope. */
6526 delete_catch (char *args
)
6528 /* Map the delete command to catch clauses described in ARGS. */
6533 catch_command (char *arg
, int from_tty
)
6535 catch_command_1 (arg
, 0, from_tty
);
6540 tcatch_command (char *arg
, int from_tty
)
6542 catch_command_1 (arg
, 1, from_tty
);
6545 /* Delete breakpoints by address or line. */
6548 clear_command (char *arg
, int from_tty
)
6550 struct breakpoint
*b
, *tmp
, *prev
, *found
;
6552 struct symtabs_and_lines sals
;
6553 struct symtab_and_line sal
;
6558 sals
= decode_line_spec (arg
, 1);
6563 sals
.sals
= (struct symtab_and_line
*)
6564 xmalloc (sizeof (struct symtab_and_line
));
6565 make_cleanup (xfree
, sals
.sals
);
6566 init_sal (&sal
); /* initialize to zeroes */
6567 sal
.line
= default_breakpoint_line
;
6568 sal
.symtab
= default_breakpoint_symtab
;
6569 sal
.pc
= default_breakpoint_address
;
6570 if (sal
.symtab
== 0)
6571 error ("No source file specified.");
6579 /* For each line spec given, delete bps which correspond
6580 to it. Do it in two passes, solely to preserve the current
6581 behavior that from_tty is forced true if we delete more than
6585 for (i
= 0; i
< sals
.nelts
; i
++)
6587 /* If exact pc given, clear bpts at that pc.
6588 If line given (pc == 0), clear all bpts on specified line.
6589 If defaulting, clear all bpts on default line
6592 defaulting sal.pc != 0 tests to do
6597 1 0 <can't happen> */
6602 /* Find all matching breakpoints, remove them from the
6603 breakpoint chain, and add them to the 'found' chain. */
6604 ALL_BREAKPOINTS_SAFE (b
, tmp
)
6606 /* Are we going to delete b? */
6607 if (b
->type
!= bp_none
6608 && b
->type
!= bp_watchpoint
6609 && b
->type
!= bp_hardware_watchpoint
6610 && b
->type
!= bp_read_watchpoint
6611 && b
->type
!= bp_access_watchpoint
6612 /* Not if b is a watchpoint of any sort... */
6613 && (((sal
.pc
&& (b
->loc
->address
== sal
.pc
))
6614 && (!section_is_overlay (b
->loc
->section
)
6615 || b
->loc
->section
== sal
.section
))
6616 /* Yes, if sal.pc matches b (modulo overlays). */
6617 || ((default_match
|| (0 == sal
.pc
))
6618 && b
->source_file
!= NULL
6619 && sal
.symtab
!= NULL
6620 && strcmp (b
->source_file
, sal
.symtab
->filename
) == 0
6621 && b
->line_number
== sal
.line
)))
6622 /* Yes, if sal source file and line matches b. */
6624 /* Remove it from breakpoint_chain... */
6625 if (b
== breakpoint_chain
)
6627 /* b is at the head of the list */
6628 breakpoint_chain
= b
->next
;
6632 prev
->next
= b
->next
;
6634 /* And add it to 'found' chain. */
6640 /* Keep b, and keep a pointer to it. */
6645 /* Now go thru the 'found' chain and delete them. */
6649 error ("No breakpoint at %s.", arg
);
6651 error ("No breakpoint at this line.");
6655 from_tty
= 1; /* Always report if deleted more than one */
6657 printf_unfiltered ("Deleted breakpoint%s ", found
->next
? "s" : "");
6658 breakpoints_changed ();
6662 printf_unfiltered ("%d ", found
->number
);
6664 delete_breakpoint (found
);
6668 putchar_unfiltered ('\n');
6671 /* Delete breakpoint in BS if they are `delete' breakpoints and
6672 all breakpoints that are marked for deletion, whether hit or not.
6673 This is called after any breakpoint is hit, or after errors. */
6676 breakpoint_auto_delete (bpstat bs
)
6678 struct breakpoint
*b
, *temp
;
6680 for (; bs
; bs
= bs
->next
)
6681 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== disp_del
6683 delete_breakpoint (bs
->breakpoint_at
);
6685 ALL_BREAKPOINTS_SAFE (b
, temp
)
6687 if (b
->disposition
== disp_del_at_next_stop
)
6688 delete_breakpoint (b
);
6692 /* Delete a breakpoint and clean up all traces of it in the data
6696 delete_breakpoint (struct breakpoint
*bpt
)
6698 struct breakpoint
*b
;
6700 struct bp_location
*loc
;
6703 error ("Internal error (attempted to delete a NULL breakpoint)");
6706 /* Has this bp already been deleted? This can happen because multiple
6707 lists can hold pointers to bp's. bpstat lists are especial culprits.
6709 One example of this happening is a watchpoint's scope bp. When the
6710 scope bp triggers, we notice that the watchpoint is out of scope, and
6711 delete it. We also delete its scope bp. But the scope bp is marked
6712 "auto-deleting", and is already on a bpstat. That bpstat is then
6713 checked for auto-deleting bp's, which are deleted.
6715 A real solution to this problem might involve reference counts in bp's,
6716 and/or giving them pointers back to their referencing bpstat's, and
6717 teaching delete_breakpoint to only free a bp's storage when no more
6718 references were extent. A cheaper bandaid was chosen. */
6719 if (bpt
->type
== bp_none
)
6722 if (delete_breakpoint_hook
)
6723 delete_breakpoint_hook (bpt
);
6724 breakpoint_delete_event (bpt
->number
);
6726 if (bpt
->loc
->inserted
)
6727 remove_breakpoint (bpt
->loc
, mark_inserted
);
6729 if (breakpoint_chain
== bpt
)
6730 breakpoint_chain
= bpt
->next
;
6732 if (bp_location_chain
== bpt
->loc
)
6733 bp_location_chain
= bpt
->loc
->next
;
6735 /* If we have callback-style exception catchpoints, don't go through
6736 the adjustments to the C++ runtime library etc. if the inferior
6737 isn't actually running. target_enable_exception_callback for a
6738 null target ops vector gives an undesirable error message, so we
6739 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6740 exceptions are supported in this way, it's OK for now. FIXME */
6741 if (ep_is_exception_catchpoint (bpt
) && target_has_execution
)
6743 /* Format possible error msg */
6744 char *message
= xstrprintf ("Error in deleting catchpoint %d:\n",
6746 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
6747 args_for_catchpoint_enable args
;
6748 args
.kind
= bpt
->type
== bp_catch_catch
?
6749 EX_EVENT_CATCH
: EX_EVENT_THROW
;
6751 catch_errors (cover_target_enable_exception_callback
, &args
,
6752 message
, RETURN_MASK_ALL
);
6753 do_cleanups (cleanups
);
6760 b
->next
= bpt
->next
;
6764 ALL_BP_LOCATIONS (loc
)
6765 if (loc
->next
== bpt
->loc
)
6767 loc
->next
= bpt
->loc
->next
;
6771 check_duplicates (bpt
);
6772 /* If this breakpoint was inserted, and there is another breakpoint
6773 at the same address, we need to insert the other breakpoint. */
6774 if (bpt
->loc
->inserted
6775 && bpt
->type
!= bp_hardware_watchpoint
6776 && bpt
->type
!= bp_read_watchpoint
6777 && bpt
->type
!= bp_access_watchpoint
6778 && bpt
->type
!= bp_catch_fork
6779 && bpt
->type
!= bp_catch_vfork
6780 && bpt
->type
!= bp_catch_exec
)
6783 if (b
->loc
->address
== bpt
->loc
->address
6784 && b
->loc
->section
== bpt
->loc
->section
6785 && !b
->loc
->duplicate
6786 && b
->enable_state
!= bp_disabled
6787 && b
->enable_state
!= bp_shlib_disabled
6788 && b
->enable_state
!= bp_call_disabled
)
6792 /* We should never reach this point if there is a permanent
6793 breakpoint at the same address as the one being deleted.
6794 If there is a permanent breakpoint somewhere, it should
6795 always be the only one inserted. */
6796 if (b
->enable_state
== bp_permanent
)
6797 internal_error (__FILE__
, __LINE__
,
6798 "another breakpoint was inserted on top of "
6799 "a permanent breakpoint");
6801 if (b
->type
== bp_hardware_breakpoint
)
6802 val
= target_insert_hw_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
6804 val
= target_insert_breakpoint (b
->loc
->address
, b
->loc
->shadow_contents
);
6806 /* If there was an error in the insert, print a message, then stop execution. */
6809 struct ui_file
*tmp_error_stream
= mem_fileopen ();
6810 make_cleanup_ui_file_delete (tmp_error_stream
);
6813 if (b
->type
== bp_hardware_breakpoint
)
6815 fprintf_unfiltered (tmp_error_stream
,
6816 "Cannot insert hardware breakpoint %d.\n"
6817 "You may have requested too many hardware breakpoints.\n",
6822 fprintf_unfiltered (tmp_error_stream
, "Cannot insert breakpoint %d.\n", b
->number
);
6823 fprintf_filtered (tmp_error_stream
, "Error accessing memory address ");
6824 print_address_numeric (b
->loc
->address
, 1, tmp_error_stream
);
6825 fprintf_filtered (tmp_error_stream
, ": %s.\n",
6826 safe_strerror (val
));
6829 fprintf_unfiltered (tmp_error_stream
,"The same program may be running in another process.");
6830 target_terminal_ours_for_output ();
6831 error_stream(tmp_error_stream
);
6834 b
->loc
->inserted
= 1;
6838 free_command_lines (&bpt
->commands
);
6841 if (bpt
->cond_string
!= NULL
)
6842 xfree (bpt
->cond_string
);
6843 if (bpt
->addr_string
!= NULL
)
6844 xfree (bpt
->addr_string
);
6845 if (bpt
->exp
!= NULL
)
6847 if (bpt
->exp_string
!= NULL
)
6848 xfree (bpt
->exp_string
);
6849 if (bpt
->val
!= NULL
)
6850 value_free (bpt
->val
);
6851 if (bpt
->source_file
!= NULL
)
6852 xfree (bpt
->source_file
);
6853 if (bpt
->dll_pathname
!= NULL
)
6854 xfree (bpt
->dll_pathname
);
6855 if (bpt
->triggered_dll_pathname
!= NULL
)
6856 xfree (bpt
->triggered_dll_pathname
);
6857 if (bpt
->exec_pathname
!= NULL
)
6858 xfree (bpt
->exec_pathname
);
6860 /* Be sure no bpstat's are pointing at it after it's been freed. */
6861 /* FIXME, how can we find all bpstat's?
6862 We just check stop_bpstat for now. */
6863 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
6864 if (bs
->breakpoint_at
== bpt
)
6866 bs
->breakpoint_at
= NULL
;
6868 /* bs->commands will be freed later. */
6870 /* On the chance that someone will soon try again to delete this same
6871 bp, we mark it as deleted before freeing its storage. */
6872 bpt
->type
= bp_none
;
6879 do_delete_breakpoint_cleanup (void *b
)
6881 delete_breakpoint (b
);
6885 make_cleanup_delete_breakpoint (struct breakpoint
*b
)
6887 return make_cleanup (do_delete_breakpoint_cleanup
, b
);
6891 make_exec_cleanup_delete_breakpoint (struct breakpoint
*b
)
6893 return make_exec_cleanup (do_delete_breakpoint_cleanup
, b
);
6897 delete_command (char *arg
, int from_tty
)
6899 struct breakpoint
*b
, *temp
;
6905 int breaks_to_delete
= 0;
6907 /* Delete all breakpoints if no argument.
6908 Do not delete internal or call-dummy breakpoints, these
6909 have to be deleted with an explicit breakpoint number argument. */
6912 if (b
->type
!= bp_call_dummy
&&
6913 b
->type
!= bp_shlib_event
&&
6914 b
->type
!= bp_thread_event
&&
6915 b
->type
!= bp_overlay_event
&&
6917 breaks_to_delete
= 1;
6920 /* Ask user only if there are some breakpoints to delete. */
6922 || (breaks_to_delete
&& query ("Delete all breakpoints? ")))
6924 ALL_BREAKPOINTS_SAFE (b
, temp
)
6926 if (b
->type
!= bp_call_dummy
&&
6927 b
->type
!= bp_shlib_event
&&
6928 b
->type
!= bp_thread_event
&&
6929 b
->type
!= bp_overlay_event
&&
6931 delete_breakpoint (b
);
6936 map_breakpoint_numbers (arg
, delete_breakpoint
);
6939 /* Reset a breakpoint given it's struct breakpoint * BINT.
6940 The value we return ends up being the return value from catch_errors.
6941 Unused in this case. */
6944 breakpoint_re_set_one (void *bint
)
6946 /* get past catch_errs */
6947 struct breakpoint
*b
= (struct breakpoint
*) bint
;
6950 struct symtabs_and_lines sals
;
6952 enum enable_state save_enable
;
6957 warning ("attempted to reset apparently deleted breakpoint #%d?",
6961 case bp_hardware_breakpoint
:
6963 case bp_catch_unload
:
6964 if (b
->addr_string
== NULL
)
6966 /* Anything without a string can't be re-set. */
6967 delete_breakpoint (b
);
6970 /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
6972 ``And a hack it is, although Apple's Darwin version of GDB
6973 contains an almost identical hack to implement a "future
6974 break" command. It seems to work in many real world cases,
6975 but it is easy to come up with a test case where the patch
6976 doesn't help at all.''
6978 ``It seems that the way GDB implements breakpoints - in -
6979 shared - libraries was designed for a.out shared library
6980 systems (SunOS 4) where shared libraries were loaded at a
6981 fixed address in memory. Since ELF shared libraries can (and
6982 will) be loaded at any address in memory, things break.
6983 Fixing this is not trivial. Therefore, I'm not sure whether
6984 we should add this hack to the branch only. I cannot
6985 guarantee that things will be fixed on the trunk in the near
6988 In case we have a problem, disable this breakpoint. We'll
6989 restore its status if we succeed. Don't disable a
6990 shlib_disabled breakpoint though. There's a fair chance we
6991 can't re-set it if the shared library it's in hasn't been
6993 save_enable
= b
->enable_state
;
6994 if (b
->enable_state
!= bp_shlib_disabled
)
6995 b
->enable_state
= bp_disabled
;
6997 set_language (b
->language
);
6998 input_radix
= b
->input_radix
;
7000 sals
= decode_line_1 (&s
, 1, (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
7001 for (i
= 0; i
< sals
.nelts
; i
++)
7003 resolve_sal_pc (&sals
.sals
[i
]);
7005 /* Reparse conditions, they might contain references to the
7007 if (b
->cond_string
!= NULL
)
7012 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
7015 /* We need to re-set the breakpoint if the address changes... */
7016 if (b
->loc
->address
!= sals
.sals
[i
].pc
7017 /* ...or new and old breakpoints both have source files, and
7018 the source file name or the line number changes... */
7019 || (b
->source_file
!= NULL
7020 && sals
.sals
[i
].symtab
!= NULL
7021 && (strcmp (b
->source_file
, sals
.sals
[i
].symtab
->filename
) != 0
7022 || b
->line_number
!= sals
.sals
[i
].line
)
7024 /* ...or we switch between having a source file and not having
7026 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
7029 if (b
->source_file
!= NULL
)
7030 xfree (b
->source_file
);
7031 if (sals
.sals
[i
].symtab
== NULL
)
7032 b
->source_file
= NULL
;
7035 savestring (sals
.sals
[i
].symtab
->filename
,
7036 strlen (sals
.sals
[i
].symtab
->filename
));
7037 b
->line_number
= sals
.sals
[i
].line
;
7038 b
->loc
->requested_address
= sals
.sals
[i
].pc
;
7040 = adjust_breakpoint_address (b
->loc
->requested_address
);
7042 /* Used to check for duplicates here, but that can
7043 cause trouble, as it doesn't check for disabled
7048 /* Might be better to do this just once per breakpoint_re_set,
7049 rather than once for every breakpoint. */
7050 breakpoints_changed ();
7052 b
->loc
->section
= sals
.sals
[i
].section
;
7053 b
->enable_state
= save_enable
; /* Restore it, this worked. */
7056 /* Now that this is re-enabled, check_duplicates
7058 check_duplicates (b
);
7065 case bp_hardware_watchpoint
:
7066 case bp_read_watchpoint
:
7067 case bp_access_watchpoint
:
7068 innermost_block
= NULL
;
7069 /* The issue arises of what context to evaluate this in. The
7070 same one as when it was set, but what does that mean when
7071 symbols have been re-read? We could save the filename and
7072 functionname, but if the context is more local than that, the
7073 best we could do would be something like how many levels deep
7074 and which index at that particular level, but that's going to
7075 be less stable than filenames or function names. */
7077 /* So for now, just use a global context. */
7080 b
->exp
= parse_expression (b
->exp_string
);
7081 b
->exp_valid_block
= innermost_block
;
7082 mark
= value_mark ();
7084 value_free (b
->val
);
7085 b
->val
= evaluate_expression (b
->exp
);
7086 release_value (b
->val
);
7087 if (VALUE_LAZY (b
->val
) && breakpoint_enabled (b
))
7088 value_fetch_lazy (b
->val
);
7090 if (b
->cond_string
!= NULL
)
7095 b
->cond
= parse_exp_1 (&s
, (struct block
*) 0, 0);
7097 if (breakpoint_enabled (b
))
7099 value_free_to_mark (mark
);
7101 case bp_catch_catch
:
7102 case bp_catch_throw
:
7104 /* We needn't really do anything to reset these, since the mask
7105 that requests them is unaffected by e.g., new libraries being
7108 case bp_catch_vfork
:
7113 printf_filtered ("Deleting unknown breakpoint type %d\n", b
->type
);
7115 /* Delete longjmp and overlay event breakpoints; they will be
7116 reset later by breakpoint_re_set. */
7118 case bp_longjmp_resume
:
7119 case bp_overlay_event
:
7120 delete_breakpoint (b
);
7123 /* This breakpoint is special, it's set up when the inferior
7124 starts and we really don't want to touch it. */
7125 case bp_shlib_event
:
7127 /* Like bp_shlib_event, this breakpoint type is special.
7128 Once it is set up, we do not want to touch it. */
7129 case bp_thread_event
:
7131 /* Keep temporary breakpoints, which can be encountered when we step
7132 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7133 Otherwise these should have been blown away via the cleanup chain
7134 or by breakpoint_init_inferior when we rerun the executable. */
7137 case bp_watchpoint_scope
:
7139 case bp_step_resume
:
7146 /* Re-set all breakpoints after symbols have been re-loaded. */
7148 breakpoint_re_set (void)
7150 struct breakpoint
*b
, *temp
;
7151 enum language save_language
;
7152 int save_input_radix
;
7154 save_language
= current_language
->la_language
;
7155 save_input_radix
= input_radix
;
7156 ALL_BREAKPOINTS_SAFE (b
, temp
)
7158 /* Format possible error msg */
7159 char *message
= xstrprintf ("Error in re-setting breakpoint %d:\n",
7161 struct cleanup
*cleanups
= make_cleanup (xfree
, message
);
7162 catch_errors (breakpoint_re_set_one
, b
, message
, RETURN_MASK_ALL
);
7163 do_cleanups (cleanups
);
7165 set_language (save_language
);
7166 input_radix
= save_input_radix
;
7168 if (GET_LONGJMP_TARGET_P ())
7170 create_longjmp_breakpoint ("longjmp");
7171 create_longjmp_breakpoint ("_longjmp");
7172 create_longjmp_breakpoint ("siglongjmp");
7173 create_longjmp_breakpoint ("_siglongjmp");
7174 create_longjmp_breakpoint (NULL
);
7177 create_overlay_event_breakpoint ("_ovly_debug_event");
7180 /* Reset the thread number of this breakpoint:
7182 - If the breakpoint is for all threads, leave it as-is.
7183 - Else, reset it to the current thread for inferior_ptid. */
7185 breakpoint_re_set_thread (struct breakpoint
*b
)
7187 if (b
->thread
!= -1)
7189 if (in_thread_list (inferior_ptid
))
7190 b
->thread
= pid_to_thread_id (inferior_ptid
);
7194 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7195 If from_tty is nonzero, it prints a message to that effect,
7196 which ends with a period (no newline). */
7199 set_ignore_count (int bptnum
, int count
, int from_tty
)
7201 struct breakpoint
*b
;
7207 if (b
->number
== bptnum
)
7209 b
->ignore_count
= count
;
7213 printf_filtered ("Will stop next time breakpoint %d is reached.",
7215 else if (count
== 1)
7216 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7219 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7222 breakpoints_changed ();
7223 breakpoint_modify_event (b
->number
);
7227 error ("No breakpoint number %d.", bptnum
);
7230 /* Clear the ignore counts of all breakpoints. */
7232 breakpoint_clear_ignore_counts (void)
7234 struct breakpoint
*b
;
7237 b
->ignore_count
= 0;
7240 /* Command to set ignore-count of breakpoint N to COUNT. */
7243 ignore_command (char *args
, int from_tty
)
7249 error_no_arg ("a breakpoint number");
7251 num
= get_number (&p
);
7253 error ("bad breakpoint number: '%s'", args
);
7255 error ("Second argument (specified ignore-count) is missing.");
7257 set_ignore_count (num
,
7258 longest_to_int (value_as_long (parse_and_eval (p
))),
7261 printf_filtered ("\n");
7264 /* Call FUNCTION on each of the breakpoints
7265 whose numbers are given in ARGS. */
7268 map_breakpoint_numbers (char *args
, void (*function
) (struct breakpoint
*))
7273 struct breakpoint
*b
, *tmp
;
7277 error_no_arg ("one or more breakpoint numbers");
7284 num
= get_number_or_range (&p1
);
7287 warning ("bad breakpoint number at or near '%s'", p
);
7291 ALL_BREAKPOINTS_SAFE (b
, tmp
)
7292 if (b
->number
== num
)
7294 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
7297 if (related_breakpoint
)
7298 function (related_breakpoint
);
7302 printf_unfiltered ("No breakpoint number %d.\n", num
);
7308 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7309 If from_tty is nonzero, it prints a message to that effect,
7310 which ends with a period (no newline). */
7313 disable_breakpoint (struct breakpoint
*bpt
)
7315 /* Never disable a watchpoint scope breakpoint; we want to
7316 hit them when we leave scope so we can delete both the
7317 watchpoint and its scope breakpoint at that time. */
7318 if (bpt
->type
== bp_watchpoint_scope
)
7321 /* You can't disable permanent breakpoints. */
7322 if (bpt
->enable_state
== bp_permanent
)
7325 bpt
->enable_state
= bp_disabled
;
7327 check_duplicates (bpt
);
7329 if (modify_breakpoint_hook
)
7330 modify_breakpoint_hook (bpt
);
7331 breakpoint_modify_event (bpt
->number
);
7335 disable_command (char *args
, int from_tty
)
7337 struct breakpoint
*bpt
;
7339 ALL_BREAKPOINTS (bpt
)
7343 warning ("attempted to disable apparently deleted breakpoint #%d?",
7348 case bp_catch_unload
:
7350 case bp_catch_vfork
:
7352 case bp_catch_catch
:
7353 case bp_catch_throw
:
7354 case bp_hardware_breakpoint
:
7356 case bp_hardware_watchpoint
:
7357 case bp_read_watchpoint
:
7358 case bp_access_watchpoint
:
7359 disable_breakpoint (bpt
);
7364 map_breakpoint_numbers (args
, disable_breakpoint
);
7368 do_enable_breakpoint (struct breakpoint
*bpt
, enum bpdisp disposition
)
7370 struct frame_info
*save_selected_frame
= NULL
;
7371 int save_selected_frame_level
= -1;
7372 int target_resources_ok
, other_type_used
;
7375 if (bpt
->type
== bp_hardware_breakpoint
)
7378 i
= hw_breakpoint_used_count ();
7379 target_resources_ok
=
7380 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint
,
7382 if (target_resources_ok
== 0)
7383 error ("No hardware breakpoint support in the target.");
7384 else if (target_resources_ok
< 0)
7385 error ("Hardware breakpoints used exceeds limit.");
7388 if (bpt
->enable_state
!= bp_permanent
)
7389 bpt
->enable_state
= bp_enabled
;
7390 bpt
->disposition
= disposition
;
7391 check_duplicates (bpt
);
7392 breakpoints_changed ();
7394 if (bpt
->type
== bp_watchpoint
||
7395 bpt
->type
== bp_hardware_watchpoint
||
7396 bpt
->type
== bp_read_watchpoint
||
7397 bpt
->type
== bp_access_watchpoint
)
7399 if (bpt
->exp_valid_block
!= NULL
)
7401 struct frame_info
*fr
=
7402 fr
= frame_find_by_id (bpt
->watchpoint_frame
);
7406 Cannot enable watchpoint %d because the block in which its expression\n\
7407 is valid is not currently in scope.\n", bpt
->number
);
7408 bpt
->enable_state
= bp_disabled
;
7412 save_selected_frame
= deprecated_selected_frame
;
7413 save_selected_frame_level
= frame_relative_level (deprecated_selected_frame
);
7417 value_free (bpt
->val
);
7418 mark
= value_mark ();
7419 bpt
->val
= evaluate_expression (bpt
->exp
);
7420 release_value (bpt
->val
);
7421 if (VALUE_LAZY (bpt
->val
))
7422 value_fetch_lazy (bpt
->val
);
7424 if (bpt
->type
== bp_hardware_watchpoint
||
7425 bpt
->type
== bp_read_watchpoint
||
7426 bpt
->type
== bp_access_watchpoint
)
7428 int i
= hw_watchpoint_used_count (bpt
->type
, &other_type_used
);
7429 int mem_cnt
= can_use_hardware_watchpoint (bpt
->val
);
7431 /* Hack around 'unused var' error for some targets here */
7433 target_resources_ok
= TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7434 bpt
->type
, i
+ mem_cnt
, other_type_used
);
7435 /* we can consider of type is bp_hardware_watchpoint, convert to
7436 bp_watchpoint in the following condition */
7437 if (target_resources_ok
< 0)
7440 Cannot enable watchpoint %d because target watch resources\n\
7441 have been allocated for other watchpoints.\n", bpt
->number
);
7442 bpt
->enable_state
= bp_disabled
;
7443 value_free_to_mark (mark
);
7448 if (save_selected_frame_level
>= 0)
7449 select_frame (save_selected_frame
);
7450 value_free_to_mark (mark
);
7452 if (modify_breakpoint_hook
)
7453 modify_breakpoint_hook (bpt
);
7454 breakpoint_modify_event (bpt
->number
);
7458 enable_breakpoint (struct breakpoint
*bpt
)
7460 do_enable_breakpoint (bpt
, bpt
->disposition
);
7463 /* The enable command enables the specified breakpoints (or all defined
7464 breakpoints) so they once again become (or continue to be) effective
7465 in stopping the inferior. */
7468 enable_command (char *args
, int from_tty
)
7470 struct breakpoint
*bpt
;
7472 ALL_BREAKPOINTS (bpt
)
7476 warning ("attempted to enable apparently deleted breakpoint #%d?",
7481 case bp_catch_unload
:
7483 case bp_catch_vfork
:
7485 case bp_catch_catch
:
7486 case bp_catch_throw
:
7487 case bp_hardware_breakpoint
:
7489 case bp_hardware_watchpoint
:
7490 case bp_read_watchpoint
:
7491 case bp_access_watchpoint
:
7492 enable_breakpoint (bpt
);
7497 map_breakpoint_numbers (args
, enable_breakpoint
);
7501 enable_once_breakpoint (struct breakpoint
*bpt
)
7503 do_enable_breakpoint (bpt
, disp_disable
);
7507 enable_once_command (char *args
, int from_tty
)
7509 map_breakpoint_numbers (args
, enable_once_breakpoint
);
7513 enable_delete_breakpoint (struct breakpoint
*bpt
)
7515 do_enable_breakpoint (bpt
, disp_del
);
7519 enable_delete_command (char *args
, int from_tty
)
7521 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
7524 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7526 struct symtabs_and_lines
7527 decode_line_spec_1 (char *string
, int funfirstline
)
7529 struct symtabs_and_lines sals
;
7531 error ("Empty line specification.");
7532 if (default_breakpoint_valid
)
7533 sals
= decode_line_1 (&string
, funfirstline
,
7534 default_breakpoint_symtab
,
7535 default_breakpoint_line
,
7536 (char ***) NULL
, NULL
);
7538 sals
= decode_line_1 (&string
, funfirstline
,
7539 (struct symtab
*) NULL
, 0, (char ***) NULL
, NULL
);
7541 error ("Junk at end of line specification: %s", string
);
7546 _initialize_breakpoint (void)
7548 struct cmd_list_element
*c
;
7550 breakpoint_chain
= 0;
7551 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7552 before a breakpoint is set. */
7553 breakpoint_count
= 0;
7555 add_com ("ignore", class_breakpoint
, ignore_command
,
7556 "Set ignore-count of breakpoint number N to COUNT.\n\
7557 Usage is `ignore N COUNT'.");
7559 add_com_alias ("bc", "ignore", class_breakpoint
, 1);
7561 add_com ("commands", class_breakpoint
, commands_command
,
7562 "Set commands to be executed when a breakpoint is hit.\n\
7563 Give breakpoint number as argument after \"commands\".\n\
7564 With no argument, the targeted breakpoint is the last one set.\n\
7565 The commands themselves follow starting on the next line.\n\
7566 Type a line containing \"end\" to indicate the end of them.\n\
7567 Give \"silent\" as the first line to make the breakpoint silent;\n\
7568 then no output is printed when it is hit, except what the commands print.");
7570 add_com ("condition", class_breakpoint
, condition_command
,
7571 "Specify breakpoint number N to break only if COND is true.\n\
7572 Usage is `condition N COND', where N is an integer and COND is an\n\
7573 expression to be evaluated whenever breakpoint N is reached.");
7575 c
= add_com ("tbreak", class_breakpoint
, tbreak_command
,
7576 "Set a temporary breakpoint. Args like \"break\" command.\n\
7577 Like \"break\" except the breakpoint is only temporary,\n\
7578 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7579 by using \"enable delete\" on the breakpoint number.");
7580 set_cmd_completer (c
, location_completer
);
7582 c
= add_com ("hbreak", class_breakpoint
, hbreak_command
,
7583 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7584 Like \"break\" except the breakpoint requires hardware support,\n\
7585 some target hardware may not have this support.");
7586 set_cmd_completer (c
, location_completer
);
7588 c
= add_com ("thbreak", class_breakpoint
, thbreak_command
,
7589 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7590 Like \"hbreak\" except the breakpoint is only temporary,\n\
7591 so it will be deleted when hit.");
7592 set_cmd_completer (c
, location_completer
);
7594 add_prefix_cmd ("enable", class_breakpoint
, enable_command
,
7595 "Enable some breakpoints.\n\
7596 Give breakpoint numbers (separated by spaces) as arguments.\n\
7597 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7598 This is used to cancel the effect of the \"disable\" command.\n\
7599 With a subcommand you can enable temporarily.",
7600 &enablelist
, "enable ", 1, &cmdlist
);
7602 add_com ("ab", class_breakpoint
, enable_command
,
7603 "Enable some breakpoints.\n\
7604 Give breakpoint numbers (separated by spaces) as arguments.\n\
7605 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7606 This is used to cancel the effect of the \"disable\" command.\n\
7607 With a subcommand you can enable temporarily.");
7609 add_com_alias ("en", "enable", class_breakpoint
, 1);
7611 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
,
7612 "Enable some breakpoints.\n\
7613 Give breakpoint numbers (separated by spaces) as arguments.\n\
7614 This is used to cancel the effect of the \"disable\" command.\n\
7615 May be abbreviated to simply \"enable\".\n",
7616 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
7618 add_cmd ("once", no_class
, enable_once_command
,
7619 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7620 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7623 add_cmd ("delete", no_class
, enable_delete_command
,
7624 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7625 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7628 add_cmd ("delete", no_class
, enable_delete_command
,
7629 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7630 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7633 add_cmd ("once", no_class
, enable_once_command
,
7634 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7635 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7638 add_prefix_cmd ("disable", class_breakpoint
, disable_command
,
7639 "Disable some breakpoints.\n\
7640 Arguments are breakpoint numbers with spaces in between.\n\
7641 To disable all breakpoints, give no argument.\n\
7642 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7643 &disablelist
, "disable ", 1, &cmdlist
);
7644 add_com_alias ("dis", "disable", class_breakpoint
, 1);
7645 add_com_alias ("disa", "disable", class_breakpoint
, 1);
7647 add_com ("sb", class_breakpoint
, disable_command
,
7648 "Disable some breakpoints.\n\
7649 Arguments are breakpoint numbers with spaces in between.\n\
7650 To disable all breakpoints, give no argument.\n\
7651 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7653 add_cmd ("breakpoints", class_alias
, disable_command
,
7654 "Disable some breakpoints.\n\
7655 Arguments are breakpoint numbers with spaces in between.\n\
7656 To disable all breakpoints, give no argument.\n\
7657 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7658 This command may be abbreviated \"disable\".",
7661 add_prefix_cmd ("delete", class_breakpoint
, delete_command
,
7662 "Delete some breakpoints or auto-display expressions.\n\
7663 Arguments are breakpoint numbers with spaces in between.\n\
7664 To delete all breakpoints, give no argument.\n\
7666 Also a prefix command for deletion of other GDB objects.\n\
7667 The \"unset\" command is also an alias for \"delete\".",
7668 &deletelist
, "delete ", 1, &cmdlist
);
7669 add_com_alias ("d", "delete", class_breakpoint
, 1);
7671 add_com ("db", class_breakpoint
, delete_command
,
7672 "Delete some breakpoints.\n\
7673 Arguments are breakpoint numbers with spaces in between.\n\
7674 To delete all breakpoints, give no argument.\n");
7676 add_cmd ("breakpoints", class_alias
, delete_command
,
7677 "Delete some breakpoints or auto-display expressions.\n\
7678 Arguments are breakpoint numbers with spaces in between.\n\
7679 To delete all breakpoints, give no argument.\n\
7680 This command may be abbreviated \"delete\".",
7683 add_com ("clear", class_breakpoint
, clear_command
,
7684 concat ("Clear breakpoint at specified line or function.\n\
7685 Argument may be line number, function name, or \"*\" and an address.\n\
7686 If line number is specified, all breakpoints in that line are cleared.\n\
7687 If function is specified, breakpoints at beginning of function are cleared.\n\
7688 If an address is specified, breakpoints at that address are cleared.\n\n",
7689 "With no argument, clears all breakpoints in the line that the selected frame\n\
7692 See also the \"delete\" command which clears breakpoints by number.", NULL
));
7694 c
= add_com ("break", class_breakpoint
, break_command
,
7695 concat ("Set breakpoint at specified line or function.\n\
7696 Argument may be line number, function name, or \"*\" and an address.\n\
7697 If line number is specified, break at start of code for that line.\n\
7698 If function is specified, break at start of code for that function.\n\
7699 If an address is specified, break at that exact address.\n",
7700 "With no arg, uses current execution address of selected stack frame.\n\
7701 This is useful for breaking on return to a stack frame.\n\
7703 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7705 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL
));
7706 set_cmd_completer (c
, location_completer
);
7708 add_com_alias ("b", "break", class_run
, 1);
7709 add_com_alias ("br", "break", class_run
, 1);
7710 add_com_alias ("bre", "break", class_run
, 1);
7711 add_com_alias ("brea", "break", class_run
, 1);
7715 add_com_alias ("ba", "break", class_breakpoint
, 1);
7716 add_com_alias ("bu", "ubreak", class_breakpoint
, 1);
7721 add_abbrev_prefix_cmd ("stop", class_breakpoint
, stop_command
,
7722 "Break in function/address or break at a line in the current file.",
7723 &stoplist
, "stop ", 1, &cmdlist
);
7724 add_cmd ("in", class_breakpoint
, stopin_command
,
7725 "Break in function or address.\n", &stoplist
);
7726 add_cmd ("at", class_breakpoint
, stopat_command
,
7727 "Break at a line in the current file.\n", &stoplist
);
7728 add_com ("status", class_info
, breakpoints_info
,
7729 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7730 The \"Type\" column indicates one of:\n\
7731 \tbreakpoint - normal breakpoint\n\
7732 \twatchpoint - watchpoint\n\
7733 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7734 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7735 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7736 address and file/line number respectively.\n\n",
7737 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7738 are set to the address of the last breakpoint listed.\n\n\
7739 Convenience variable \"$bpnum\" contains the number of the last\n\
7740 breakpoint set.", NULL
));
7743 add_info ("breakpoints", breakpoints_info
,
7744 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7745 The \"Type\" column indicates one of:\n\
7746 \tbreakpoint - normal breakpoint\n\
7747 \twatchpoint - watchpoint\n\
7748 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7749 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7750 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7751 address and file/line number respectively.\n\n",
7752 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7753 are set to the address of the last breakpoint listed.\n\n\
7754 Convenience variable \"$bpnum\" contains the number of the last\n\
7755 breakpoint set.", NULL
));
7758 add_com ("lb", class_breakpoint
, breakpoints_info
,
7759 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7760 The \"Type\" column indicates one of:\n\
7761 \tbreakpoint - normal breakpoint\n\
7762 \twatchpoint - watchpoint\n\
7763 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7764 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7765 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7766 address and file/line number respectively.\n\n",
7767 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7768 are set to the address of the last breakpoint listed.\n\n\
7769 Convenience variable \"$bpnum\" contains the number of the last\n\
7770 breakpoint set.", NULL
));
7772 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
,
7773 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7774 The \"Type\" column indicates one of:\n\
7775 \tbreakpoint - normal breakpoint\n\
7776 \twatchpoint - watchpoint\n\
7777 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7778 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7779 \tuntil - internal breakpoint used by the \"until\" command\n\
7780 \tfinish - internal breakpoint used by the \"finish\" command\n",
7781 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7782 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7783 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7784 address and file/line number respectively.\n\n",
7785 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7786 are set to the address of the last breakpoint listed.\n\n\
7787 Convenience variable \"$bpnum\" contains the number of the last\n\
7788 breakpoint set.", NULL
),
7789 &maintenanceinfolist
);
7791 add_com ("catch", class_breakpoint
, catch_command
,
7792 "Set catchpoints to catch events.\n\
7793 Raised signals may be caught:\n\
7794 \tcatch signal - all signals\n\
7795 \tcatch signal <signame> - a particular signal\n\
7796 Raised exceptions may be caught:\n\
7797 \tcatch throw - all exceptions, when thrown\n\
7798 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7799 \tcatch catch - all exceptions, when caught\n\
7800 \tcatch catch <exceptname> - a particular exception, when caught\n\
7801 Thread or process events may be caught:\n\
7802 \tcatch thread_start - any threads, just after creation\n\
7803 \tcatch thread_exit - any threads, just before expiration\n\
7804 \tcatch thread_join - any threads, just after joins\n\
7805 Process events may be caught:\n\
7806 \tcatch start - any processes, just after creation\n\
7807 \tcatch exit - any processes, just before expiration\n\
7808 \tcatch fork - calls to fork()\n\
7809 \tcatch vfork - calls to vfork()\n\
7810 \tcatch exec - calls to exec()\n\
7811 Dynamically-linked library events may be caught:\n\
7812 \tcatch load - loads of any library\n\
7813 \tcatch load <libname> - loads of a particular library\n\
7814 \tcatch unload - unloads of any library\n\
7815 \tcatch unload <libname> - unloads of a particular library\n\
7816 The act of your program's execution stopping may also be caught:\n\
7818 C++ exceptions may be caught:\n\
7819 \tcatch throw - all exceptions, when thrown\n\
7820 \tcatch catch - all exceptions, when caught\n\
7822 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7823 after a fork or vfork is caught.\n\n\
7824 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7826 add_com ("tcatch", class_breakpoint
, tcatch_command
,
7827 "Set temporary catchpoints to catch events.\n\
7828 Args like \"catch\" command.\n\
7829 Like \"catch\" except the catchpoint is only temporary,\n\
7830 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7831 by using \"enable delete\" on the catchpoint number.");
7833 c
= add_com ("watch", class_breakpoint
, watch_command
,
7834 "Set a watchpoint for an expression.\n\
7835 A watchpoint stops execution of your program whenever the value of\n\
7836 an expression changes.");
7837 set_cmd_completer (c
, location_completer
);
7839 c
= add_com ("rwatch", class_breakpoint
, rwatch_command
,
7840 "Set a read watchpoint for an expression.\n\
7841 A watchpoint stops execution of your program whenever the value of\n\
7842 an expression is read.");
7843 set_cmd_completer (c
, location_completer
);
7845 c
= add_com ("awatch", class_breakpoint
, awatch_command
,
7846 "Set a watchpoint for an expression.\n\
7847 A watchpoint stops execution of your program whenever the value of\n\
7848 an expression is either read or written.");
7849 set_cmd_completer (c
, location_completer
);
7851 add_info ("watchpoints", breakpoints_info
,
7852 "Synonym for ``info breakpoints''.");
7855 c
= add_set_cmd ("can-use-hw-watchpoints", class_support
, var_zinteger
,
7856 (char *) &can_use_hw_watchpoints
,
7857 "Set debugger's willingness to use watchpoint hardware.\n\
7858 If zero, gdb will not use hardware for new watchpoints, even if\n\
7859 such is available. (However, any hardware watchpoints that were\n\
7860 created before setting this to nonzero, will continue to use watchpoint\n\
7863 add_show_from_set (c
, &showlist
);
7865 can_use_hw_watchpoints
= 1;