1 /* Everything about breakpoints, for GDB.
2 Copyright 1986, 1987, 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
24 #include "breakpoint.h"
26 #include "expression.h"
40 /* local function prototypes */
43 catch_command_1
PARAMS ((char *, int, int));
46 enable_delete_command
PARAMS ((char *, int));
49 enable_delete_breakpoint
PARAMS ((struct breakpoint
*));
52 enable_once_command
PARAMS ((char *, int));
55 enable_once_breakpoint
PARAMS ((struct breakpoint
*));
58 disable_command
PARAMS ((char *, int));
61 disable_breakpoint
PARAMS ((struct breakpoint
*));
64 enable_command
PARAMS ((char *, int));
67 enable_breakpoint
PARAMS ((struct breakpoint
*));
70 map_breakpoint_numbers
PARAMS ((char *, void (*)(struct breakpoint
*)));
73 ignore_command
PARAMS ((char *, int));
76 breakpoint_re_set_one
PARAMS ((char *));
79 delete_command
PARAMS ((char *, int));
82 clear_command
PARAMS ((char *, int));
85 catch_command
PARAMS ((char *, int));
87 static struct symtabs_and_lines
88 get_catch_sals
PARAMS ((int));
91 watch_command
PARAMS ((char *, int));
94 can_use_hardware_watchpoint
PARAMS ((struct breakpoint
*));
97 tbreak_command
PARAMS ((char *, int));
100 break_command_1
PARAMS ((char *, int, int));
103 mention
PARAMS ((struct breakpoint
*));
105 static struct breakpoint
*
106 set_raw_breakpoint
PARAMS ((struct symtab_and_line
));
109 check_duplicates
PARAMS ((CORE_ADDR
));
112 describe_other_breakpoints
PARAMS ((CORE_ADDR
));
115 breakpoints_info
PARAMS ((char *, int));
118 breakpoint_1
PARAMS ((int, int));
121 bpstat_alloc
PARAMS ((struct breakpoint
*, bpstat
));
124 breakpoint_cond_eval
PARAMS ((char *));
127 cleanup_executing_breakpoints
PARAMS ((int));
130 commands_command
PARAMS ((char *, int));
133 condition_command
PARAMS ((char *, int));
136 get_number
PARAMS ((char **));
139 set_breakpoint_count
PARAMS ((int));
142 remove_breakpoint
PARAMS ((struct breakpoint
*));
144 extern int addressprint
; /* Print machine addresses? */
145 extern int demangle
; /* Print de-mangled symbol names? */
147 /* Are we executing breakpoint commands? */
148 static int executing_breakpoint_commands
;
150 /* Walk the following statement or block through all breakpoints.
151 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
154 #define ALL_BREAKPOINTS(b) for (b = breakpoint_chain; b; b = b->next)
156 #define ALL_BREAKPOINTS_SAFE(b,tmp) \
157 for (b = breakpoint_chain; \
158 b? (tmp=b->next, 1): 0; \
161 /* By default no support for hardware watchpoints is assumed. */
162 #ifndef TARGET_CAN_USE_HARDWARE_WATCHPOINT
163 #define TARGET_CAN_USE_HARDWARE_WATCHPOINT(B) 0
164 #define target_remove_watchpoint(ADDR,LEN) -1
165 #define target_insert_watchpoint(ADDR,LEN) -1
168 /* Chain of all breakpoints defined. */
170 static struct breakpoint
*breakpoint_chain
;
172 /* Number of last breakpoint made. */
174 static int breakpoint_count
;
176 /* Set breakpoint count to NUM. */
178 set_breakpoint_count (num
)
181 breakpoint_count
= num
;
182 set_internalvar (lookup_internalvar ("bpnum"),
183 value_from_longest (builtin_type_int
, (LONGEST
) num
));
186 /* Default address, symtab and line to put a breakpoint at
187 for "break" command with no arg.
188 if default_breakpoint_valid is zero, the other three are
189 not valid, and "break" with no arg is an error.
191 This set by print_stack_frame, which calls set_default_breakpoint. */
193 int default_breakpoint_valid
;
194 CORE_ADDR default_breakpoint_address
;
195 struct symtab
*default_breakpoint_symtab
;
196 int default_breakpoint_line
;
198 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
199 Advance *PP after the string and any trailing whitespace.
201 Currently the string can either be a number or "$" followed by the name
202 of a convenience variable. Making it an expression wouldn't work well
203 for map_breakpoint_numbers (e.g. "4 + 5 + 6"). */
212 /* Empty line means refer to the last breakpoint. */
213 return breakpoint_count
;
216 /* Make a copy of the name, so we can null-terminate it
217 to pass to lookup_internalvar(). */
222 while (isalnum (*p
) || *p
== '_')
224 varname
= (char *) alloca (p
- start
+ 1);
225 strncpy (varname
, start
, p
- start
);
226 varname
[p
- start
] = '\0';
227 val
= value_of_internalvar (lookup_internalvar (varname
));
228 if (TYPE_CODE (VALUE_TYPE (val
)) != TYPE_CODE_INT
)
230 "Convenience variables used to specify breakpoints must have integer values."
232 retval
= (int) value_as_long (val
);
238 while (*p
>= '0' && *p
<= '9')
241 /* There is no number here. (e.g. "cond a == b"). */
242 error_no_arg ("breakpoint number");
245 if (!(isspace (*p
) || *p
== '\0'))
246 error ("breakpoint number expected");
253 /* condition N EXP -- set break condition of breakpoint N to EXP. */
256 condition_command (arg
, from_tty
)
260 register struct breakpoint
*b
;
265 error_no_arg ("breakpoint number");
268 bnum
= get_number (&p
);
271 if (b
->number
== bnum
)
278 if (b
->cond_string
!= NULL
)
279 free ((PTR
)b
->cond_string
);
284 b
->cond_string
= NULL
;
286 printf_filtered ("Breakpoint %d now unconditional.\n", bnum
);
291 /* I don't know if it matters whether this is the string the user
292 typed in or the decompiled expression. */
293 b
->cond_string
= savestring (arg
, strlen (arg
));
294 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->address
), 0);
296 error ("Junk at end of expression");
301 error ("No breakpoint number %d.", bnum
);
306 commands_command (arg
, from_tty
)
310 register struct breakpoint
*b
;
313 struct command_line
*l
;
315 /* If we allowed this, we would have problems with when to
316 free the storage, if we change the commands currently
319 if (executing_breakpoint_commands
)
320 error ("Can't use the \"commands\" command among a breakpoint's commands.");
323 bnum
= get_number (&p
);
325 error ("Unexpected extra arguments following breakpoint number.");
328 if (b
->number
== bnum
)
330 if (from_tty
&& input_from_terminal_p ())
331 printf_filtered ("Type commands for when breakpoint %d is hit, one per line.\n\
332 End with a line saying just \"end\".\n", bnum
);
333 l
= read_command_lines ();
334 free_command_lines (&b
->commands
);
336 breakpoints_changed ();
339 error ("No breakpoint number %d.", bnum
);
342 extern int memory_breakpoint_size
; /* from mem-break.c */
344 /* Like target_read_memory() but if breakpoints are inserted, return
345 the shadow contents instead of the breakpoints themselves.
347 Read "memory data" from whatever target or inferior we have.
348 Returns zero if successful, errno value if not. EIO is used
349 for address out of bounds. If breakpoints are inserted, returns
350 shadow contents, not the breakpoints themselves. From breakpoint.c. */
353 read_memory_nobpt (memaddr
, myaddr
, len
)
359 struct breakpoint
*b
;
361 if (memory_breakpoint_size
< 0)
362 /* No breakpoints on this machine. FIXME: This should be
363 dependent on the debugging target. Probably want
364 target_insert_breakpoint to return a size, saying how many
365 bytes of the shadow contents are used, or perhaps have
366 something like target_xfer_shadow. */
367 return target_read_memory (memaddr
, myaddr
, len
);
371 if (b
->type
== bp_watchpoint
372 || b
->type
== bp_hardware_watchpoint
375 else if (b
->address
+ memory_breakpoint_size
<= memaddr
)
376 /* The breakpoint is entirely before the chunk of memory
379 else if (b
->address
>= memaddr
+ len
)
380 /* The breakpoint is entirely after the chunk of memory we
385 /* Copy the breakpoint from the shadow contents, and recurse
386 for the things before and after. */
388 /* Addresses and length of the part of the breakpoint that
390 CORE_ADDR membpt
= b
->address
;
391 unsigned int bptlen
= memory_breakpoint_size
;
392 /* Offset within shadow_contents. */
395 if (membpt
< memaddr
)
397 /* Only copy the second part of the breakpoint. */
398 bptlen
-= memaddr
- membpt
;
399 bptoffset
= memaddr
- membpt
;
403 if (membpt
+ bptlen
> memaddr
+ len
)
405 /* Only copy the first part of the breakpoint. */
406 bptlen
-= (membpt
+ bptlen
) - (memaddr
+ len
);
409 memcpy (myaddr
+ membpt
- memaddr
,
410 b
->shadow_contents
+ bptoffset
, bptlen
);
412 if (membpt
> memaddr
)
414 /* Copy the section of memory before the breakpoint. */
415 status
= read_memory_nobpt (memaddr
, myaddr
, membpt
- memaddr
);
420 if (membpt
+ bptlen
< memaddr
+ len
)
422 /* Copy the section of memory after the breakpoint. */
423 status
= read_memory_nobpt
425 myaddr
+ membpt
+ bptlen
- memaddr
,
426 memaddr
+ len
- (membpt
+ bptlen
));
433 /* Nothing overlaps. Just call read_memory_noerr. */
434 return target_read_memory (memaddr
, myaddr
, len
);
437 /* insert_breakpoints is used when starting or continuing the program.
438 remove_breakpoints is used when the program stops.
439 Both return zero if successful,
440 or an `errno' value if could not write the inferior. */
443 insert_breakpoints ()
445 register struct breakpoint
*b
;
447 int disabled_breaks
= 0;
450 if (b
->type
!= bp_watchpoint
451 && b
->type
!= bp_hardware_watchpoint
452 && b
->enable
!= disabled
456 val
= target_insert_breakpoint(b
->address
, b
->shadow_contents
);
459 /* Can't set the breakpoint. */
460 #if defined (DISABLE_UNSETTABLE_BREAK)
461 if (DISABLE_UNSETTABLE_BREAK (b
->address
))
464 b
->enable
= disabled
;
465 if (!disabled_breaks
)
467 target_terminal_ours_for_output ();
468 fprintf_unfiltered (gdb_stderr
,
469 "Cannot insert breakpoint %d:\n", b
->number
);
470 printf_filtered ("Disabling shared library breakpoints:\n");
473 printf_filtered ("%d ", b
->number
);
478 target_terminal_ours_for_output ();
479 fprintf_unfiltered (gdb_stderr
, "Cannot insert breakpoint %d:\n", b
->number
);
480 #ifdef ONE_PROCESS_WRITETEXT
481 fprintf_unfiltered (gdb_stderr
,
482 "The same program may be running in another process.\n");
484 memory_error (val
, b
->address
); /* which bombs us out */
490 else if (b
->type
== bp_hardware_watchpoint
491 && b
->enable
== enabled
496 int saved_level
, within_current_scope
;
497 value_ptr mark
= value_mark ();
500 /* Save the current frame and level so we can restore it after
501 evaluating the watchpoint expression on its own frame. */
502 saved_frame
= selected_frame
;
503 saved_level
= selected_frame_level
;
505 /* Determine if the watchpoint is within scope. */
506 if (b
->exp_valid_block
== NULL
)
507 within_current_scope
= 1;
510 FRAME fr
= find_frame_addr_in_frame_chain (b
->watchpoint_frame
);
511 within_current_scope
= (fr
!= NULL
);
512 if (within_current_scope
)
513 select_frame (fr
, -1);
516 if (within_current_scope
)
518 /* Evaluate the expression and cut the chain of values
519 produced off from the value chain. */
520 v
= evaluate_expression (b
->exp
);
521 value_release_to_mark (mark
);
526 /* Look at each value on the value chain. */
527 for ( ; v
; v
=v
->next
)
529 /* If it's a memory location, then we must watch it. */
530 if (v
->lval
== lval_memory
)
534 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
535 len
= TYPE_LENGTH (VALUE_TYPE (v
));
536 val
= target_insert_watchpoint (addr
, len
);
545 /* Failure to insert a watchpoint on any memory value in the
546 value chain brings us here. */
548 warning ("Hardware watchpoint %d: Could not insert watchpoint\n",
554 Hardware watchpoint %d deleted because the program has left the block in\n\
555 which its expression is valid.\n", b
->number
);
556 if (b
->related_breakpoint
)
557 delete_breakpoint (b
->related_breakpoint
);
558 delete_breakpoint (b
);
561 /* Restore the frame and level. */
562 select_frame (saved_frame
, saved_level
);
565 printf_filtered ("\n");
571 remove_breakpoints ()
573 register struct breakpoint
*b
;
580 val
= remove_breakpoint (b
);
590 remove_breakpoint (b
)
591 struct breakpoint
*b
;
595 if (b
->type
!= bp_watchpoint
596 && b
->type
!= bp_hardware_watchpoint
)
598 val
= target_remove_breakpoint(b
->address
, b
->shadow_contents
);
603 else if (b
->type
== bp_hardware_watchpoint
604 && b
->enable
== enabled
610 /* Walk down the saved value chain. */
611 for (v
= b
->val_chain
; v
; v
= v
->next
)
613 /* For each memory reference remove the watchpoint
615 if (v
->lval
== lval_memory
)
619 addr
= VALUE_ADDRESS (v
) + VALUE_OFFSET (v
);
620 len
= TYPE_LENGTH (VALUE_TYPE (v
));
621 val
= target_remove_watchpoint (addr
, len
);
627 /* Failure to remove any of the hardware watchpoints comes here. */
629 error ("Hardware watchpoint %d: Could not remove watchpoint\n",
632 /* Free the saved value chain. We will construct a new one
633 the next time the watchpoint is inserted. */
634 for (v
= b
->val_chain
; v
; v
= n
)
644 /* Clear the "inserted" flag in all breakpoints. */
647 mark_breakpoints_out ()
649 register struct breakpoint
*b
;
655 /* Clear the "inserted" flag in all breakpoints and delete any breakpoints
656 which should go away between runs of the program. */
659 breakpoint_init_inferior ()
661 register struct breakpoint
*b
, *temp
;
663 ALL_BREAKPOINTS_SAFE (b
, temp
)
667 /* If the call dummy breakpoint is at the entry point it will
668 cause problems when the inferior is rerun, so we better
670 if (b
->type
== bp_call_dummy
)
671 delete_breakpoint (b
);
673 /* Likewise for scope breakpoints. */
674 if (b
->type
== bp_watchpoint_scope
)
675 delete_breakpoint (b
);
677 /* Likewise for watchpoints on local expressions. */
678 if ((b
->type
== bp_watchpoint
|| b
->type
== bp_hardware_watchpoint
)
679 && b
->exp_valid_block
!= NULL
)
680 delete_breakpoint (b
);
684 /* breakpoint_here_p (PC) returns 1 if an enabled breakpoint exists at PC.
685 When continuing from a location with a breakpoint,
686 we actually single step once before calling insert_breakpoints. */
689 breakpoint_here_p (pc
)
692 register struct breakpoint
*b
;
695 if (b
->enable
!= disabled
&& b
->address
== pc
)
701 /* Return nonzero if FRAME is a dummy frame. We can't use PC_IN_CALL_DUMMY
702 because figuring out the saved SP would take too much time, at least using
703 get_saved_register on the 68k. This means that for this function to
704 work right a port must use the bp_call_dummy breakpoint. */
707 frame_in_dummy (frame
)
710 struct breakpoint
*b
;
715 static unsigned LONGEST dummy
[] = CALL_DUMMY
;
717 if (b
->type
== bp_call_dummy
718 && b
->frame
== frame
->frame
720 /* We need to check the PC as well as the frame on the sparc,
721 for signals.exp in the testsuite. */
724 - sizeof (dummy
) / sizeof (LONGEST
) * REGISTER_SIZE
))
725 && frame
->pc
<= b
->address
)
728 #endif /* CALL_DUMMY */
732 /* breakpoint_match_thread (PC, PID) returns true if the breakpoint at PC
733 is valid for process/thread PID. */
736 breakpoint_thread_match (pc
, pid
)
740 struct breakpoint
*b
;
743 thread
= pid_to_thread_id (pid
);
746 if (b
->enable
!= disabled
748 && (b
->thread
== -1 || b
->thread
== thread
))
755 /* bpstat stuff. External routines' interfaces are documented
758 /* Clear a bpstat so that it says we are not at any breakpoint.
759 Also free any storage that is part of a bpstat. */
774 if (p
->old_val
!= NULL
)
775 value_free (p
->old_val
);
782 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
783 is part of the bpstat is copied as well. */
791 bpstat retval
= NULL
;
796 for (; bs
!= NULL
; bs
= bs
->next
)
798 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
799 memcpy (tmp
, bs
, sizeof (*tmp
));
801 /* This is the first thing in the chain. */
811 /* Find the bpstat associated with this breakpoint */
814 bpstat_find_breakpoint(bsp
, breakpoint
)
816 struct breakpoint
*breakpoint
;
818 if (bsp
== NULL
) return NULL
;
820 for (;bsp
!= NULL
; bsp
= bsp
->next
) {
821 if (bsp
->breakpoint_at
== breakpoint
) return bsp
;
826 /* Return the breakpoint number of the first breakpoint we are stopped
827 at. *BSP upon return is a bpstat which points to the remaining
828 breakpoints stopped at (but which is not guaranteed to be good for
829 anything but further calls to bpstat_num).
830 Return 0 if passed a bpstat which does not indicate any breakpoints. */
836 struct breakpoint
*b
;
839 return 0; /* No more breakpoint values */
842 b
= (*bsp
)->breakpoint_at
;
845 return -1; /* breakpoint that's been deleted since */
847 return b
->number
; /* We have its number */
851 /* Modify BS so that the actions will not be performed. */
854 bpstat_clear_actions (bs
)
857 for (; bs
!= NULL
; bs
= bs
->next
)
860 if (bs
->old_val
!= NULL
)
862 value_free (bs
->old_val
);
868 /* Stub for cleaning up our state if we error-out of a breakpoint command */
871 cleanup_executing_breakpoints (ignore
)
874 executing_breakpoint_commands
= 0;
877 /* Execute all the commands associated with all the breakpoints at this
878 location. Any of these commands could cause the process to proceed
879 beyond this point, etc. We look out for such changes by checking
880 the global "breakpoint_proceeded" after each command. */
883 bpstat_do_actions (bsp
)
887 struct cleanup
*old_chain
;
889 executing_breakpoint_commands
= 1;
890 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
895 breakpoint_proceeded
= 0;
896 for (; bs
!= NULL
; bs
= bs
->next
)
900 char *line
= bs
->commands
->line
;
901 bs
->commands
= bs
->commands
->next
;
902 execute_command (line
, 0);
903 /* If the inferior is proceeded by the command, bomb out now.
904 The bpstat chain has been blown away by wait_for_inferior.
905 But since execution has stopped again, there is a new bpstat
906 to look at, so start over. */
907 if (breakpoint_proceeded
)
912 executing_breakpoint_commands
= 0;
913 discard_cleanups (old_chain
);
916 /* This is the normal print_it function for a bpstat. In the future,
917 much of this logic could (should?) be moved to bpstat_stop_status,
918 by having it set different print_it functions. */
924 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
925 which has since been deleted. */
926 if (bs
->breakpoint_at
== NULL
927 || (bs
->breakpoint_at
->type
!= bp_breakpoint
928 && bs
->breakpoint_at
->type
!= bp_watchpoint
929 && bs
->breakpoint_at
->type
!= bp_hardware_watchpoint
))
932 if (bs
->breakpoint_at
->type
== bp_breakpoint
)
934 /* I think the user probably only wants to see one breakpoint
935 number, not all of them. */
936 annotate_breakpoint (bs
->breakpoint_at
->number
);
937 printf_filtered ("\nBreakpoint %d, ", bs
->breakpoint_at
->number
);
941 if (bs
->old_val
!= NULL
)
943 annotate_watchpoint (bs
->breakpoint_at
->number
);
944 printf_filtered ("\nWatchpoint %d, ", bs
->breakpoint_at
->number
);
945 print_expression (bs
->breakpoint_at
->exp
, gdb_stdout
);
946 printf_filtered ("\nOld value = ");
947 value_print (bs
->old_val
, gdb_stdout
, 0, Val_pretty_default
);
948 printf_filtered ("\nNew value = ");
949 value_print (bs
->breakpoint_at
->val
, gdb_stdout
, 0,
951 printf_filtered ("\n");
952 value_free (bs
->old_val
);
954 /* More than one watchpoint may have been triggered. */
957 /* We can't deal with it. Maybe another member of the bpstat chain can. */
961 /* Print a message indicating what happened. Returns nonzero to
962 say that only the source line should be printed after this (zero
963 return means print the frame as well as the source line). */
964 /* Currently we always return zero. */
974 val
= (*bs
->print_it
) (bs
);
978 /* Maybe another breakpoint in the chain caused us to stop.
979 (Currently all watchpoints go on the bpstat whether hit or
980 not. That probably could (should) be changed, provided care is taken
981 with respect to bpstat_explains_signal). */
983 return bpstat_print (bs
->next
);
985 /* We reached the end of the chain without printing anything. */
989 /* Evaluate the expression EXP and return 1 if value is zero.
990 This is used inside a catch_errors to evaluate the breakpoint condition.
991 The argument is a "struct expression *" that has been cast to char * to
992 make it pass through catch_errors. */
995 breakpoint_cond_eval (exp
)
998 return !value_true (evaluate_expression ((struct expression
*)exp
));
1001 /* Allocate a new bpstat and chain it to the current one. */
1004 bpstat_alloc (b
, cbs
)
1005 register struct breakpoint
*b
;
1006 bpstat cbs
; /* Current "bs" value */
1010 bs
= (bpstat
) xmalloc (sizeof (*bs
));
1012 bs
->breakpoint_at
= b
;
1013 /* If the condition is false, etc., don't do the commands. */
1014 bs
->commands
= NULL
;
1016 bs
->print_it
= print_it_normal
;
1022 /* Possible return values for watchpoint_check (this can't be an enum
1023 because of check_errors). */
1024 /* The watchpoint has been deleted. */
1025 #define WP_DELETED 1
1026 /* The value has changed. */
1027 #define WP_VALUE_CHANGED 2
1028 /* The value has not changed. */
1029 #define WP_VALUE_NOT_CHANGED 3
1031 /* Check watchpoint condition. */
1033 watchpoint_check (p
)
1036 bpstat bs
= (bpstat
) p
;
1037 FRAME saved_frame
, fr
;
1038 int within_current_scope
, saved_level
;
1040 /* Save the current frame and level so we can restore it after
1041 evaluating the watchpoint expression on its own frame. */
1042 saved_frame
= selected_frame
;
1043 saved_level
= selected_frame_level
;
1045 if (bs
->breakpoint_at
->exp_valid_block
== NULL
)
1046 within_current_scope
= 1;
1049 fr
= find_frame_addr_in_frame_chain (bs
->breakpoint_at
->watchpoint_frame
);
1050 within_current_scope
= (fr
!= NULL
);
1051 if (within_current_scope
)
1052 /* If we end up stopping, the current frame will get selected
1053 in normal_stop. So this call to select_frame won't affect
1055 select_frame (fr
, -1);
1058 if (within_current_scope
)
1060 /* We use value_{,free_to_}mark because it could be a
1061 *long* time before we return to the command level and
1062 call free_all_values. We can't call free_all_values because
1063 we might be in the middle of evaluating a function call. */
1065 value_ptr mark
= value_mark ();
1066 value_ptr new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
1067 if (!value_equal (bs
->breakpoint_at
->val
, new_val
))
1069 release_value (new_val
);
1070 value_free_to_mark (mark
);
1071 bs
->old_val
= bs
->breakpoint_at
->val
;
1072 bs
->breakpoint_at
->val
= new_val
;
1073 /* We will stop here */
1074 select_frame (saved_frame
, saved_level
);
1075 return WP_VALUE_CHANGED
;
1079 /* Nothing changed, don't do anything. */
1080 value_free_to_mark (mark
);
1081 /* We won't stop here */
1082 select_frame (saved_frame
, saved_level
);
1083 return WP_VALUE_NOT_CHANGED
;
1088 /* This seems like the only logical thing to do because
1089 if we temporarily ignored the watchpoint, then when
1090 we reenter the block in which it is valid it contains
1091 garbage (in the case of a function, it may have two
1092 garbage values, one before and one after the prologue).
1093 So we can't even detect the first assignment to it and
1094 watch after that (since the garbage may or may not equal
1095 the first value assigned). */
1097 Watchpoint %d deleted because the program has left the block in\n\
1098 which its expression is valid.\n", bs
->breakpoint_at
->number
);
1099 if (bs
->breakpoint_at
->related_breakpoint
)
1100 delete_breakpoint (bs
->breakpoint_at
->related_breakpoint
);
1101 delete_breakpoint (bs
->breakpoint_at
);
1103 select_frame (saved_frame
, saved_level
);
1108 /* This is used when everything which needs to be printed has
1109 already been printed. But we still want to print the frame. */
1117 /* This is used when nothing should be printed for this bpstat entry. */
1126 /* Get a bpstat associated with having just stopped at address *PC
1127 and frame address FRAME_ADDRESS. Update *PC to point at the
1128 breakpoint (if we hit a breakpoint). NOT_A_BREAKPOINT is nonzero
1129 if this is known to not be a real breakpoint (it could still be a
1130 watchpoint, though). */
1132 /* Determine whether we stopped at a breakpoint, etc, or whether we
1133 don't understand this stop. Result is a chain of bpstat's such that:
1135 if we don't understand the stop, the result is a null pointer.
1137 if we understand why we stopped, the result is not null.
1139 Each element of the chain refers to a particular breakpoint or
1140 watchpoint at which we have stopped. (We may have stopped for
1141 several reasons concurrently.)
1143 Each element of the chain has valid next, breakpoint_at,
1144 commands, FIXME??? fields.
1149 bpstat_stop_status (pc
, frame_address
, not_a_breakpoint
)
1151 FRAME_ADDR frame_address
;
1152 int not_a_breakpoint
;
1154 register struct breakpoint
*b
;
1156 #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
1157 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
1158 int real_breakpoint
= 0;
1160 /* Root of the chain of bpstat's */
1161 struct bpstat root_bs
[1];
1162 /* Pointer to the last thing in the chain currently. */
1163 bpstat bs
= root_bs
;
1165 /* Get the address where the breakpoint would have been. */
1166 bp_addr
= *pc
- DECR_PC_AFTER_BREAK
;
1170 if (b
->enable
== disabled
)
1173 if (b
->type
!= bp_watchpoint
1174 && b
->type
!= bp_hardware_watchpoint
1175 && b
->address
!= bp_addr
)
1178 if (b
->type
!= bp_watchpoint
1179 && b
->type
!= bp_hardware_watchpoint
1180 && not_a_breakpoint
)
1183 /* Come here if it's a watchpoint, or if the break address matches */
1185 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
1190 if (b
->type
== bp_watchpoint
|| b
->type
== bp_hardware_watchpoint
)
1192 static char message1
[] =
1193 "Error evaluating expression for watchpoint %d\n";
1194 char message
[sizeof (message1
) + 30 /* slop */];
1195 sprintf (message
, message1
, b
->number
);
1196 switch (catch_errors (watchpoint_check
, (char *) bs
, message
,
1200 /* We've already printed what needs to be printed. */
1201 bs
->print_it
= print_it_done
;
1204 case WP_VALUE_CHANGED
:
1207 case WP_VALUE_NOT_CHANGED
:
1209 bs
->print_it
= print_it_noop
;
1216 /* Error from catch_errors. */
1217 printf_filtered ("Watchpoint %d deleted.\n", b
->number
);
1218 if (b
->related_breakpoint
)
1219 delete_breakpoint (b
->related_breakpoint
);
1220 delete_breakpoint (b
);
1221 /* We've already printed what needs to be printed. */
1222 bs
->print_it
= print_it_done
;
1228 #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
1230 real_breakpoint
= 1;
1233 if (b
->frame
&& b
->frame
!= frame_address
)
1237 int value_is_zero
= 0;
1241 /* Need to select the frame, with all that implies
1242 so that the conditions will have the right context. */
1243 select_frame (get_current_frame (), 0);
1245 = catch_errors (breakpoint_cond_eval
, (char *)(b
->cond
),
1246 "Error in testing breakpoint condition:\n",
1248 /* FIXME-someday, should give breakpoint # */
1251 if (b
->cond
&& value_is_zero
)
1255 else if (b
->ignore_count
> 0)
1262 /* We will stop here */
1263 if (b
->disposition
== disable
)
1264 b
->enable
= disabled
;
1265 bs
->commands
= b
->commands
;
1268 if (bs
->commands
&& STREQ ("silent", bs
->commands
->line
))
1270 bs
->commands
= bs
->commands
->next
;
1275 /* Print nothing for this entry if we dont stop or if we dont print. */
1276 if (bs
->stop
== 0 || bs
->print
== 0)
1277 bs
->print_it
= print_it_noop
;
1280 bs
->next
= NULL
; /* Terminate the chain */
1281 bs
= root_bs
->next
; /* Re-grab the head of the chain */
1282 #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
1285 if (real_breakpoint
)
1288 #if defined (SHIFT_INST_REGS)
1290 #else /* No SHIFT_INST_REGS. */
1292 #endif /* No SHIFT_INST_REGS. */
1295 #endif /* DECR_PC_AFTER_BREAK != 0. */
1297 /* The value of a hardware watchpoint hasn't changed, but the
1298 intermediate memory locations we are watching may have. */
1299 if (bs
&& ! bs
->stop
1300 && bs
->breakpoint_at
->type
== bp_hardware_watchpoint
)
1302 remove_breakpoints ();
1303 insert_breakpoints ();
1308 /* Tell what to do about this bpstat. */
1313 /* Classify each bpstat as one of the following. */
1315 /* This bpstat element has no effect on the main_action. */
1318 /* There was a watchpoint, stop but don't print. */
1321 /* There was a watchpoint, stop and print. */
1324 /* There was a breakpoint but we're not stopping. */
1327 /* There was a breakpoint, stop but don't print. */
1330 /* There was a breakpoint, stop and print. */
1333 /* We hit the longjmp breakpoint. */
1336 /* We hit the longjmp_resume breakpoint. */
1339 /* We hit the step_resume breakpoint. */
1342 /* We hit the through_sigtramp breakpoint. */
1345 /* This is just used to count how many enums there are. */
1349 /* Here is the table which drives this routine. So that we can
1350 format it pretty, we define some abbreviations for the
1351 enum bpstat_what codes. */
1352 #define keep_c BPSTAT_WHAT_KEEP_CHECKING
1353 #define stop_s BPSTAT_WHAT_STOP_SILENT
1354 #define stop_n BPSTAT_WHAT_STOP_NOISY
1355 #define single BPSTAT_WHAT_SINGLE
1356 #define setlr BPSTAT_WHAT_SET_LONGJMP_RESUME
1357 #define clrlr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
1358 #define clrlrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
1359 #define sr BPSTAT_WHAT_STEP_RESUME
1360 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
1362 /* "Can't happen." Might want to print an error message.
1363 abort() is not out of the question, but chances are GDB is just
1364 a bit confused, not unusable. */
1365 #define err BPSTAT_WHAT_STOP_NOISY
1367 /* Given an old action and a class, come up with a new action. */
1368 /* One interesting property of this table is that wp_silent is the same
1369 as bp_silent and wp_noisy is the same as bp_noisy. That is because
1370 after stopping, the check for whether to step over a breakpoint
1371 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
1372 reference to how we stopped. We retain separate wp_silent and bp_silent
1373 codes in case we want to change that someday. */
1375 /* step_resume entries: a step resume breakpoint overrides another
1376 breakpoint of signal handling (see comment in wait_for_inferior
1377 at first IN_SIGTRAMP where we set the step_resume breakpoint). */
1378 /* We handle the through_sigtramp_breakpoint the same way; having both
1379 one of those and a step_resume_breakpoint is probably very rare (?). */
1381 static const enum bpstat_what_main_action
1382 table
[(int)class_last
][(int)BPSTAT_WHAT_LAST
] =
1385 /* keep_c stop_s stop_n single setlr clrlr clrlrs sr ts
1387 /*no_effect*/ {keep_c
,stop_s
,stop_n
,single
, setlr
, clrlr
, clrlrs
, sr
, ts
},
1388 /*wp_silent*/ {stop_s
,stop_s
,stop_n
,stop_s
, stop_s
, stop_s
, stop_s
, sr
, ts
},
1389 /*wp_noisy*/ {stop_n
,stop_n
,stop_n
,stop_n
, stop_n
, stop_n
, stop_n
, sr
, ts
},
1390 /*bp_nostop*/ {single
,stop_s
,stop_n
,single
, setlr
, clrlrs
, clrlrs
, sr
, ts
},
1391 /*bp_silent*/ {stop_s
,stop_s
,stop_n
,stop_s
, stop_s
, stop_s
, stop_s
, sr
, ts
},
1392 /*bp_noisy*/ {stop_n
,stop_n
,stop_n
,stop_n
, stop_n
, stop_n
, stop_n
, sr
, ts
},
1393 /*long_jump*/ {setlr
,stop_s
,stop_n
,setlr
, err
, err
, err
, sr
, ts
},
1394 /*long_resume*/ {clrlr
,stop_s
,stop_n
,clrlrs
, err
, err
, err
, sr
, ts
},
1395 /*step_resume*/ {sr
,sr
,sr
,sr
, sr
, sr
, sr
, sr
, ts
},
1396 /*through_sig*/ {ts
,ts
,ts
,ts
, ts
, ts
, ts
, ts
, ts
}
1408 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
1409 struct bpstat_what retval
;
1411 retval
.call_dummy
= 0;
1412 for (; bs
!= NULL
; bs
= bs
->next
)
1414 enum class bs_class
= no_effect
;
1415 if (bs
->breakpoint_at
== NULL
)
1416 /* I suspect this can happen if it was a momentary breakpoint
1417 which has since been deleted. */
1419 switch (bs
->breakpoint_at
->type
)
1427 bs_class
= bp_noisy
;
1429 bs_class
= bp_silent
;
1432 bs_class
= bp_nostop
;
1435 case bp_hardware_watchpoint
:
1439 bs_class
= wp_noisy
;
1441 bs_class
= wp_silent
;
1444 /* There was a watchpoint, but we're not stopping. This requires
1445 no further action. */
1446 bs_class
= no_effect
;
1449 bs_class
= long_jump
;
1451 case bp_longjmp_resume
:
1452 bs_class
= long_resume
;
1454 case bp_step_resume
:
1457 bs_class
= step_resume
;
1460 /* It is for the wrong frame. */
1461 bs_class
= bp_nostop
;
1463 case bp_through_sigtramp
:
1464 bs_class
= through_sig
;
1466 case bp_watchpoint_scope
:
1467 bs_class
= bp_nostop
;
1471 /* Make sure the action is stop (silent or noisy), so infrun.c
1472 pops the dummy frame. */
1473 bs_class
= bp_silent
;
1474 retval
.call_dummy
= 1;
1477 current_action
= table
[(int)bs_class
][(int)current_action
];
1479 retval
.main_action
= current_action
;
1483 /* Nonzero if we should step constantly (e.g. watchpoints on machines
1484 without hardware support). This isn't related to a specific bpstat,
1485 just to things like whether watchpoints are set. */
1488 bpstat_should_step ()
1490 struct breakpoint
*b
;
1492 if (b
->enable
== enabled
&& b
->type
== bp_watchpoint
)
1497 /* Print information on breakpoint number BNUM, or -1 if all.
1498 If WATCHPOINTS is zero, process only breakpoints; if WATCHPOINTS
1499 is nonzero, process only watchpoints. */
1502 breakpoint_1 (bnum
, allflag
)
1506 register struct breakpoint
*b
;
1507 register struct command_line
*l
;
1508 register struct symbol
*sym
;
1509 CORE_ADDR last_addr
= (CORE_ADDR
)-1;
1510 int found_a_breakpoint
= 0;
1511 static char *bptypes
[] = {"breakpoint", "until", "finish", "watchpoint",
1512 "hardware watchpoint", "longjmp",
1513 "longjmp resume", "step resume",
1514 "watchpoint scope", "call dummy" };
1515 static char *bpdisps
[] = {"del", "dis", "keep"};
1516 static char bpenables
[] = "ny";
1517 char wrap_indent
[80];
1521 || bnum
== b
->number
)
1523 /* We only print out user settable breakpoints unless the allflag is set. */
1525 && b
->type
!= bp_breakpoint
1526 && b
->type
!= bp_watchpoint
1527 && b
->type
!= bp_hardware_watchpoint
)
1530 if (!found_a_breakpoint
++)
1533 printf_filtered ("Num ");
1535 printf_filtered ("Type ");
1537 printf_filtered ("Disp ");
1539 printf_filtered ("Enb ");
1543 printf_filtered ("Address ");
1546 printf_filtered ("What\n");
1548 annotate_breakpoints_table ();
1553 printf_filtered ("%-3d ", b
->number
);
1555 printf_filtered ("%-14s ", bptypes
[(int)b
->type
]);
1557 printf_filtered ("%-4s ", bpdisps
[(int)b
->disposition
]);
1559 printf_filtered ("%-3c ", bpenables
[(int)b
->enable
]);
1561 strcpy (wrap_indent
, " ");
1563 strcat (wrap_indent
, " ");
1567 case bp_hardware_watchpoint
:
1568 /* Field 4, the address, is omitted (which makes the columns
1569 not line up too nicely with the headers, but the effect
1570 is relatively readable). */
1572 print_expression (b
->exp
, gdb_stdout
);
1579 case bp_longjmp_resume
:
1580 case bp_step_resume
:
1581 case bp_through_sigtramp
:
1582 case bp_watchpoint_scope
:
1587 /* FIXME-32x64: need a print_address_numeric with
1591 local_hex_string_custom
1592 ((unsigned long) b
->address
, "08l"));
1597 last_addr
= b
->address
;
1600 sym
= find_pc_function (b
->address
);
1603 fputs_filtered ("in ", gdb_stdout
);
1604 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), gdb_stdout
);
1605 wrap_here (wrap_indent
);
1606 fputs_filtered (" at ", gdb_stdout
);
1608 fputs_filtered (b
->source_file
, gdb_stdout
);
1609 printf_filtered (":%d", b
->line_number
);
1612 print_address_symbolic (b
->address
, gdb_stdout
, demangle
, " ");
1616 printf_filtered ("\n");
1622 printf_filtered ("\tstop only in stack frame at ");
1623 print_address_numeric (b
->frame
, 1, gdb_stdout
);
1624 printf_filtered ("\n");
1631 printf_filtered ("\tstop only if ");
1632 print_expression (b
->cond
, gdb_stdout
);
1633 printf_filtered ("\n");
1636 if (b
->ignore_count
)
1640 printf_filtered ("\tignore next %d hits\n", b
->ignore_count
);
1643 if ((l
= b
->commands
))
1649 fputs_filtered ("\t", gdb_stdout
);
1650 fputs_filtered (l
->line
, gdb_stdout
);
1651 fputs_filtered ("\n", gdb_stdout
);
1657 if (!found_a_breakpoint
)
1660 printf_filtered ("No breakpoints or watchpoints.\n");
1662 printf_filtered ("No breakpoint or watchpoint number %d.\n", bnum
);
1665 /* Compare against (CORE_ADDR)-1 in case some compiler decides
1666 that a comparison of an unsigned with -1 is always false. */
1667 if (last_addr
!= (CORE_ADDR
)-1)
1668 set_next_address (last_addr
);
1670 annotate_breakpoints_table_end ();
1675 breakpoints_info (bnum_exp
, from_tty
)
1682 bnum
= parse_and_eval_address (bnum_exp
);
1684 breakpoint_1 (bnum
, 0);
1687 #if MAINTENANCE_CMDS
1691 maintenance_info_breakpoints (bnum_exp
, from_tty
)
1698 bnum
= parse_and_eval_address (bnum_exp
);
1700 breakpoint_1 (bnum
, 1);
1705 /* Print a message describing any breakpoints set at PC. */
1708 describe_other_breakpoints (pc
)
1709 register CORE_ADDR pc
;
1711 register int others
= 0;
1712 register struct breakpoint
*b
;
1715 if (b
->address
== pc
)
1719 printf_filtered ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
1721 if (b
->address
== pc
)
1727 (b
->enable
== disabled
) ? " (disabled)" : "",
1728 (others
> 1) ? "," : ((others
== 1) ? " and" : ""));
1730 printf_filtered ("also set at pc ");
1731 print_address_numeric (pc
, 1, gdb_stdout
);
1732 printf_filtered (".\n");
1736 /* Set the default place to put a breakpoint
1737 for the `break' command with no arguments. */
1740 set_default_breakpoint (valid
, addr
, symtab
, line
)
1743 struct symtab
*symtab
;
1746 default_breakpoint_valid
= valid
;
1747 default_breakpoint_address
= addr
;
1748 default_breakpoint_symtab
= symtab
;
1749 default_breakpoint_line
= line
;
1752 /* Rescan breakpoints at address ADDRESS,
1753 marking the first one as "first" and any others as "duplicates".
1754 This is so that the bpt instruction is only inserted once. */
1757 check_duplicates (address
)
1760 register struct breakpoint
*b
;
1761 register int count
= 0;
1763 if (address
== 0) /* Watchpoints are uninteresting */
1767 if (b
->enable
!= disabled
&& b
->address
== address
)
1770 b
->duplicate
= count
> 1;
1774 /* Low level routine to set a breakpoint.
1775 Takes as args the three things that every breakpoint must have.
1776 Returns the breakpoint object so caller can set other things.
1777 Does not set the breakpoint number!
1778 Does not print anything.
1780 ==> This routine should not be called if there is a chance of later
1781 error(); otherwise it leaves a bogus breakpoint on the chain. Validate
1782 your arguments BEFORE calling this routine! */
1784 static struct breakpoint
*
1785 set_raw_breakpoint (sal
)
1786 struct symtab_and_line sal
;
1788 register struct breakpoint
*b
, *b1
;
1790 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
1791 memset (b
, 0, sizeof (*b
));
1792 b
->address
= sal
.pc
;
1793 if (sal
.symtab
== NULL
)
1794 b
->source_file
= NULL
;
1796 b
->source_file
= savestring (sal
.symtab
->filename
,
1797 strlen (sal
.symtab
->filename
));
1799 b
->line_number
= sal
.line
;
1800 b
->enable
= enabled
;
1803 b
->ignore_count
= 0;
1807 /* Add this breakpoint to the end of the chain
1808 so that a list of breakpoints will come out in order
1809 of increasing numbers. */
1811 b1
= breakpoint_chain
;
1813 breakpoint_chain
= b
;
1821 check_duplicates (sal
.pc
);
1822 breakpoints_changed ();
1828 create_longjmp_breakpoint(func_name
)
1831 struct symtab_and_line sal
;
1832 struct breakpoint
*b
;
1833 static int internal_breakpoint_number
= -1;
1835 if (func_name
!= NULL
)
1837 struct minimal_symbol
*m
;
1839 m
= lookup_minimal_symbol(func_name
, (struct objfile
*)NULL
);
1841 sal
.pc
= SYMBOL_VALUE_ADDRESS (m
);
1851 b
= set_raw_breakpoint(sal
);
1854 b
->type
= func_name
!= NULL
? bp_longjmp
: bp_longjmp_resume
;
1855 b
->disposition
= donttouch
;
1856 b
->enable
= disabled
;
1859 b
->addr_string
= strsave(func_name
);
1860 b
->number
= internal_breakpoint_number
--;
1863 /* Call this routine when stepping and nexting to enable a breakpoint if we do
1864 a longjmp(). When we hit that breakpoint, call
1865 set_longjmp_resume_breakpoint() to figure out where we are going. */
1868 enable_longjmp_breakpoint()
1870 register struct breakpoint
*b
;
1873 if (b
->type
== bp_longjmp
)
1875 b
->enable
= enabled
;
1876 check_duplicates (b
->address
);
1881 disable_longjmp_breakpoint()
1883 register struct breakpoint
*b
;
1886 if ( b
->type
== bp_longjmp
1887 || b
->type
== bp_longjmp_resume
)
1889 b
->enable
= disabled
;
1890 check_duplicates (b
->address
);
1894 /* Call this after hitting the longjmp() breakpoint. Use this to set a new
1895 breakpoint at the target of the jmp_buf.
1897 FIXME - This ought to be done by setting a temporary breakpoint that gets
1898 deleted automatically...
1902 set_longjmp_resume_breakpoint(pc
, frame
)
1906 register struct breakpoint
*b
;
1909 if (b
->type
== bp_longjmp_resume
)
1912 b
->enable
= enabled
;
1914 b
->frame
= FRAME_FP(frame
);
1917 check_duplicates (b
->address
);
1922 /* Set a breakpoint that will evaporate an end of command
1923 at address specified by SAL.
1924 Restrict it to frame FRAME if FRAME is nonzero. */
1927 set_momentary_breakpoint (sal
, frame
, type
)
1928 struct symtab_and_line sal
;
1932 register struct breakpoint
*b
;
1933 b
= set_raw_breakpoint (sal
);
1935 b
->enable
= enabled
;
1936 b
->disposition
= donttouch
;
1937 b
->frame
= (frame
? FRAME_FP (frame
) : 0);
1943 clear_momentary_breakpoints ()
1945 register struct breakpoint
*b
;
1947 if (b
->disposition
== delete)
1949 delete_breakpoint (b
);
1955 /* Tell the user we have just set a breakpoint B. */
1958 struct breakpoint
*b
;
1963 printf_filtered ("Watchpoint %d: ", b
->number
);
1964 print_expression (b
->exp
, gdb_stdout
);
1966 case bp_hardware_watchpoint
:
1967 printf_filtered ("Hardware watchpoint %d: ", b
->number
);
1968 print_expression (b
->exp
, gdb_stdout
);
1971 printf_filtered ("Breakpoint %d at ", b
->number
);
1972 print_address_numeric (b
->address
, 1, gdb_stdout
);
1974 printf_filtered (": file %s, line %d.",
1975 b
->source_file
, b
->line_number
);
1980 case bp_longjmp_resume
:
1981 case bp_step_resume
:
1982 case bp_through_sigtramp
:
1984 case bp_watchpoint_scope
:
1987 printf_filtered ("\n");
1991 /* Nobody calls this currently. */
1992 /* Set a breakpoint from a symtab and line.
1993 If TEMPFLAG is nonzero, it is a temporary breakpoint.
1994 ADDR_STRING is a malloc'd string holding the name of where we are
1995 setting the breakpoint. This is used later to re-set it after the
1996 program is relinked and symbols are reloaded.
1997 Print the same confirmation messages that the breakpoint command prints. */
2000 set_breakpoint (s
, line
, tempflag
, addr_string
)
2006 register struct breakpoint
*b
;
2007 struct symtab_and_line sal
;
2012 resolve_sal_pc (&sal
); /* Might error out */
2013 describe_other_breakpoints (sal
.pc
);
2015 b
= set_raw_breakpoint (sal
);
2016 set_breakpoint_count (breakpoint_count
+ 1);
2017 b
->number
= breakpoint_count
;
2018 b
->type
= bp_breakpoint
;
2020 b
->addr_string
= addr_string
;
2021 b
->enable
= enabled
;
2022 b
->disposition
= tempflag
? delete : donttouch
;
2028 /* Set a breakpoint according to ARG (function, linenum or *address)
2029 and make it temporary if TEMPFLAG is nonzero. */
2032 break_command_1 (arg
, tempflag
, from_tty
)
2034 int tempflag
, from_tty
;
2036 struct symtabs_and_lines sals
;
2037 struct symtab_and_line sal
;
2038 register struct expression
*cond
= 0;
2039 register struct breakpoint
*b
;
2041 /* Pointers in arg to the start, and one past the end, of the condition. */
2042 char *cond_start
= NULL
;
2043 char *cond_end
= NULL
;
2044 /* Pointers in arg to the start, and one past the end,
2045 of the address part. */
2046 char *addr_start
= NULL
;
2047 char *addr_end
= NULL
;
2048 struct cleanup
*old_chain
;
2049 struct cleanup
*canonical_strings_chain
= NULL
;
2050 char **canonical
= (char **)NULL
;
2057 sal
.line
= sal
.pc
= sal
.end
= 0;
2060 /* If no arg given, or if first arg is 'if ', use the default breakpoint. */
2062 if (!arg
|| (arg
[0] == 'i' && arg
[1] == 'f'
2063 && (arg
[2] == ' ' || arg
[2] == '\t')))
2065 if (default_breakpoint_valid
)
2067 sals
.sals
= (struct symtab_and_line
*)
2068 xmalloc (sizeof (struct symtab_and_line
));
2069 sal
.pc
= default_breakpoint_address
;
2070 sal
.line
= default_breakpoint_line
;
2071 sal
.symtab
= default_breakpoint_symtab
;
2076 error ("No default breakpoint address now.");
2082 /* Force almost all breakpoints to be in terms of the
2083 current_source_symtab (which is decode_line_1's default). This
2084 should produce the results we want almost all of the time while
2085 leaving default_breakpoint_* alone. */
2086 if (default_breakpoint_valid
2087 && (!current_source_symtab
2088 || (arg
&& (*arg
== '+' || *arg
== '-'))))
2089 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
2090 default_breakpoint_line
, &canonical
);
2092 sals
= decode_line_1 (&arg
, 1, (struct symtab
*)NULL
, 0, &canonical
);
2100 /* Make sure that all storage allocated in decode_line_1 gets freed in case
2101 the following `for' loop errors out. */
2102 old_chain
= make_cleanup (free
, sals
.sals
);
2103 if (canonical
!= (char **)NULL
)
2105 make_cleanup (free
, canonical
);
2106 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
2107 for (i
= 0; i
< sals
.nelts
; i
++)
2109 if (canonical
[i
] != NULL
)
2110 make_cleanup (free
, canonical
[i
]);
2114 thread
= -1; /* No specific thread yet */
2116 /* Resolve all line numbers to PC's, and verify that conditions
2117 can be parsed, before setting any breakpoints. */
2118 for (i
= 0; i
< sals
.nelts
; i
++)
2120 char *tok
, *end_tok
;
2123 resolve_sal_pc (&sals
.sals
[i
]);
2129 while (*tok
== ' ' || *tok
== '\t')
2134 while (*end_tok
!= ' ' && *end_tok
!= '\t' && *end_tok
!= '\000')
2137 toklen
= end_tok
- tok
;
2139 if (toklen
>= 1 && strncmp (tok
, "if", toklen
) == 0)
2141 tok
= cond_start
= end_tok
+ 1;
2142 cond
= parse_exp_1 (&tok
, block_for_pc (sals
.sals
[i
].pc
), 0);
2145 else if (toklen
>= 1 && strncmp (tok
, "thread", toklen
) == 0)
2151 thread
= strtol (tok
, &tok
, 0);
2153 error ("Junk after thread keyword.");
2154 if (!valid_thread_id (thread
))
2155 error ("Unknown thread %d\n", thread
);
2158 error ("Junk at end of arguments.");
2162 /* Remove the canonical strings from the cleanup, they are needed below. */
2163 if (canonical
!= (char **)NULL
)
2164 discard_cleanups (canonical_strings_chain
);
2166 /* Now set all the breakpoints. */
2167 for (i
= 0; i
< sals
.nelts
; i
++)
2172 describe_other_breakpoints (sal
.pc
);
2174 b
= set_raw_breakpoint (sal
);
2175 set_breakpoint_count (breakpoint_count
+ 1);
2176 b
->number
= breakpoint_count
;
2177 b
->type
= bp_breakpoint
;
2181 /* If a canonical line spec is needed use that instead of the
2183 if (canonical
!= (char **)NULL
&& canonical
[i
] != NULL
)
2184 b
->addr_string
= canonical
[i
];
2185 else if (addr_start
)
2186 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
2188 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
2190 b
->enable
= enabled
;
2191 b
->disposition
= tempflag
? delete : donttouch
;
2198 printf_filtered ("Multiple breakpoints were set.\n");
2199 printf_filtered ("Use the \"delete\" command to delete unwanted breakpoints.\n");
2201 do_cleanups (old_chain
);
2204 /* Helper function for break_command_1 and disassemble_command. */
2207 resolve_sal_pc (sal
)
2208 struct symtab_and_line
*sal
;
2212 if (sal
->pc
== 0 && sal
->symtab
!= 0)
2214 pc
= find_line_pc (sal
->symtab
, sal
->line
);
2216 error ("No line %d in file \"%s\".",
2217 sal
->line
, sal
->symtab
->filename
);
2223 break_command (arg
, from_tty
)
2227 break_command_1 (arg
, 0, from_tty
);
2231 tbreak_command (arg
, from_tty
)
2235 break_command_1 (arg
, 1, from_tty
);
2240 watch_command (arg
, from_tty
)
2244 struct breakpoint
*b
;
2245 struct symtab_and_line sal
;
2246 struct expression
*exp
;
2247 struct block
*exp_valid_block
;
2249 FRAME frame
, prev_frame
;
2255 /* Parse arguments. */
2256 innermost_block
= NULL
;
2257 exp
= parse_expression (arg
);
2258 exp_valid_block
= innermost_block
;
2259 val
= evaluate_expression (exp
);
2260 release_value (val
);
2261 if (VALUE_LAZY (val
))
2262 value_fetch_lazy (val
);
2264 /* Now set up the breakpoint. */
2265 b
= set_raw_breakpoint (sal
);
2266 set_breakpoint_count (breakpoint_count
+ 1);
2267 b
->number
= breakpoint_count
;
2268 b
->disposition
= donttouch
;
2270 b
->exp_valid_block
= exp_valid_block
;
2273 b
->cond_string
= NULL
;
2274 b
->exp_string
= savestring (arg
, strlen (arg
));
2276 frame
= block_innermost_frame (exp_valid_block
);
2279 prev_frame
= get_prev_frame (frame
);
2280 b
->watchpoint_frame
= FRAME_FP (frame
);
2283 b
->watchpoint_frame
= (CORE_ADDR
)0;
2285 if (can_use_hardware_watchpoint (b
))
2286 b
->type
= bp_hardware_watchpoint
;
2288 b
->type
= bp_watchpoint
;
2290 /* If the expression is "local", then set up a "watchpoint scope"
2291 breakpoint at the point where we've left the scope of the watchpoint
2293 if (innermost_block
)
2295 struct breakpoint
*scope_breakpoint
;
2296 struct symtab_and_line scope_sal
;
2300 scope_sal
.pc
= get_frame_pc (prev_frame
);
2301 scope_sal
.symtab
= NULL
;
2304 scope_breakpoint
= set_raw_breakpoint (scope_sal
);
2305 set_breakpoint_count (breakpoint_count
+ 1);
2306 scope_breakpoint
->number
= breakpoint_count
;
2308 scope_breakpoint
->type
= bp_watchpoint_scope
;
2309 scope_breakpoint
->enable
= enabled
;
2311 /* Automatically delete the breakpoint when it hits. */
2312 scope_breakpoint
->disposition
= delete;
2314 /* Only break in the proper frame (help with recursion). */
2315 scope_breakpoint
->frame
= prev_frame
->frame
;
2317 /* Set the address at which we will stop. */
2318 scope_breakpoint
->address
= get_frame_pc (prev_frame
);
2320 /* The scope breakpoint is related to the watchpoint. We
2321 will need to act on them together. */
2322 b
->related_breakpoint
= scope_breakpoint
;
2329 /* Return nonzero if the watchpoint described by B can be handled
2330 completely in hardware. If the watchpoint can not be handled
2331 in hardware return zero. */
2334 can_use_hardware_watchpoint (b
)
2335 struct breakpoint
*b
;
2337 value_ptr mark
= value_mark ();
2338 value_ptr v
= evaluate_expression (b
->exp
);
2339 int found_memory
= 0;
2341 /* Make sure all the intermediate values are in memory. Also make sure
2342 we found at least one memory expression. Guards against watch 0x12345,
2343 which is meaningless, but could cause errors if one tries to insert a
2344 hardware watchpoint for the constant expression. */
2345 for ( ; v
!= mark
; v
= v
->next
)
2347 if (!(v
->lval
== lval_memory
)
2348 || v
->lval
== not_lval
2349 || (v
->lval
!= not_lval
2350 && v
->modifiable
== 0))
2353 if (v
->lval
== lval_memory
)
2357 /* The expression itself looks suitable for using a hardware
2358 watchpoint, but give the target machine a chance to reject it. */
2359 return found_memory
&& TARGET_CAN_USE_HARDWARE_WATCHPOINT (b
);
2364 * Helper routine for the until_command routine in infcmd.c. Here
2365 * because it uses the mechanisms of breakpoints.
2369 until_break_command (arg
, from_tty
)
2373 struct symtabs_and_lines sals
;
2374 struct symtab_and_line sal
;
2375 FRAME prev_frame
= get_prev_frame (selected_frame
);
2376 struct breakpoint
*breakpoint
;
2377 struct cleanup
*old_chain
;
2379 clear_proceed_status ();
2381 /* Set a breakpoint where the user wants it and at return from
2384 if (default_breakpoint_valid
)
2385 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
2386 default_breakpoint_line
, (char ***)NULL
);
2388 sals
= decode_line_1 (&arg
, 1, (struct symtab
*)NULL
, 0, (char ***)NULL
);
2390 if (sals
.nelts
!= 1)
2391 error ("Couldn't get information on specified line.");
2394 free ((PTR
)sals
.sals
); /* malloc'd, so freed */
2397 error ("Junk at end of arguments.");
2399 resolve_sal_pc (&sal
);
2401 breakpoint
= set_momentary_breakpoint (sal
, selected_frame
, bp_until
);
2403 old_chain
= make_cleanup(delete_breakpoint
, breakpoint
);
2405 /* Keep within the current frame */
2409 struct frame_info
*fi
;
2411 fi
= get_frame_info (prev_frame
);
2412 sal
= find_pc_line (fi
->pc
, 0);
2414 breakpoint
= set_momentary_breakpoint (sal
, prev_frame
, bp_until
);
2415 make_cleanup(delete_breakpoint
, breakpoint
);
2418 proceed (-1, TARGET_SIGNAL_DEFAULT
, 0);
2419 do_cleanups(old_chain
);
2423 /* These aren't used; I don't konw what they were for. */
2424 /* Set a breakpoint at the catch clause for NAME. */
2426 catch_breakpoint (name
)
2432 disable_catch_breakpoint ()
2437 delete_catch_breakpoint ()
2442 enable_catch_breakpoint ()
2449 struct sal_chain
*next
;
2450 struct symtab_and_line sal
;
2454 /* This isn't used; I don't know what it was for. */
2455 /* For each catch clause identified in ARGS, run FUNCTION
2456 with that clause as an argument. */
2457 static struct symtabs_and_lines
2458 map_catch_names (args
, function
)
2462 register char *p
= args
;
2464 struct symtabs_and_lines sals
;
2466 struct sal_chain
*sal_chain
= 0;
2470 error_no_arg ("one or more catch names");
2478 /* Don't swallow conditional part. */
2479 if (p1
[0] == 'i' && p1
[1] == 'f'
2480 && (p1
[2] == ' ' || p1
[2] == '\t'))
2486 while (isalnum (*p1
) || *p1
== '_' || *p1
== '$')
2490 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
2491 error ("Arguments must be catch names.");
2497 struct sal_chain
*next
2498 = (struct sal_chain
*)alloca (sizeof (struct sal_chain
));
2499 next
->next
= sal_chain
;
2500 next
->sal
= get_catch_sal (p
);
2505 printf_unfiltered ("No catch clause for exception %s.\n", p
);
2510 while (*p
== ' ' || *p
== '\t') p
++;
2515 /* This shares a lot of code with `print_frame_label_vars' from stack.c. */
2517 static struct symtabs_and_lines
2518 get_catch_sals (this_level_only
)
2519 int this_level_only
;
2521 register struct blockvector
*bl
;
2522 register struct block
*block
;
2523 int index
, have_default
= 0;
2524 struct frame_info
*fi
;
2526 struct symtabs_and_lines sals
;
2527 struct sal_chain
*sal_chain
= 0;
2528 char *blocks_searched
;
2530 /* Not sure whether an error message is always the correct response,
2531 but it's better than a core dump. */
2532 if (selected_frame
== NULL
)
2533 error ("No selected frame.");
2534 block
= get_frame_block (selected_frame
);
2535 fi
= get_frame_info (selected_frame
);
2542 error ("No symbol table info available.\n");
2544 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
2545 blocks_searched
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
2546 memset (blocks_searched
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
2550 CORE_ADDR end
= BLOCK_END (block
) - 4;
2553 if (bl
!= blockvector_for_pc (end
, &index
))
2554 error ("blockvector blotch");
2555 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
2556 error ("blockvector botch");
2557 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
2560 /* Don't print out blocks that have gone by. */
2561 while (index
< last_index
2562 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
2565 while (index
< last_index
2566 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
2568 if (blocks_searched
[index
] == 0)
2570 struct block
*b
= BLOCKVECTOR_BLOCK (bl
, index
);
2573 register struct symbol
*sym
;
2575 nsyms
= BLOCK_NSYMS (b
);
2577 for (i
= 0; i
< nsyms
; i
++)
2579 sym
= BLOCK_SYM (b
, i
);
2580 if (STREQ (SYMBOL_NAME (sym
), "default"))
2586 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
2588 struct sal_chain
*next
= (struct sal_chain
*)
2589 alloca (sizeof (struct sal_chain
));
2590 next
->next
= sal_chain
;
2591 next
->sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
2595 blocks_searched
[index
] = 1;
2601 if (sal_chain
&& this_level_only
)
2604 /* After handling the function's top-level block, stop.
2605 Don't continue to its superblock, the block of
2606 per-file symbols. */
2607 if (BLOCK_FUNCTION (block
))
2609 block
= BLOCK_SUPERBLOCK (block
);
2614 struct sal_chain
*tmp_chain
;
2616 /* Count the number of entries. */
2617 for (index
= 0, tmp_chain
= sal_chain
; tmp_chain
;
2618 tmp_chain
= tmp_chain
->next
)
2622 sals
.sals
= (struct symtab_and_line
*)
2623 xmalloc (index
* sizeof (struct symtab_and_line
));
2624 for (index
= 0; sal_chain
; sal_chain
= sal_chain
->next
, index
++)
2625 sals
.sals
[index
] = sal_chain
->sal
;
2631 /* Commands to deal with catching exceptions. */
2634 catch_command_1 (arg
, tempflag
, from_tty
)
2639 /* First, translate ARG into something we can deal with in terms
2642 struct symtabs_and_lines sals
;
2643 struct symtab_and_line sal
;
2644 register struct expression
*cond
= 0;
2645 register struct breakpoint
*b
;
2649 sal
.line
= sal
.pc
= sal
.end
= 0;
2652 /* If no arg given, or if first arg is 'if ', all active catch clauses
2653 are breakpointed. */
2655 if (!arg
|| (arg
[0] == 'i' && arg
[1] == 'f'
2656 && (arg
[2] == ' ' || arg
[2] == '\t')))
2658 /* Grab all active catch clauses. */
2659 sals
= get_catch_sals (0);
2663 /* Grab selected catch clauses. */
2664 error ("catch NAME not implemented");
2666 /* This isn't used; I don't know what it was for. */
2667 sals
= map_catch_names (arg
, catch_breakpoint
);
2675 for (i
= 0; i
< sals
.nelts
; i
++)
2677 resolve_sal_pc (&sals
.sals
[i
]);
2681 if (arg
[0] == 'i' && arg
[1] == 'f'
2682 && (arg
[2] == ' ' || arg
[2] == '\t'))
2683 cond
= parse_exp_1 ((arg
+= 2, &arg
),
2684 block_for_pc (sals
.sals
[i
].pc
), 0);
2686 error ("Junk at end of arguments.");
2691 for (i
= 0; i
< sals
.nelts
; i
++)
2696 describe_other_breakpoints (sal
.pc
);
2698 b
= set_raw_breakpoint (sal
);
2699 set_breakpoint_count (breakpoint_count
+ 1);
2700 b
->number
= breakpoint_count
;
2701 b
->type
= bp_breakpoint
;
2703 b
->enable
= enabled
;
2704 b
->disposition
= tempflag
? delete : donttouch
;
2711 printf_unfiltered ("Multiple breakpoints were set.\n");
2712 printf_unfiltered ("Use the \"delete\" command to delete unwanted breakpoints.\n");
2714 free ((PTR
)sals
.sals
);
2718 /* These aren't used; I don't know what they were for. */
2719 /* Disable breakpoints on all catch clauses described in ARGS. */
2721 disable_catch (args
)
2724 /* Map the disable command to catch clauses described in ARGS. */
2727 /* Enable breakpoints on all catch clauses described in ARGS. */
2732 /* Map the disable command to catch clauses described in ARGS. */
2735 /* Delete breakpoints on all catch clauses in the active scope. */
2740 /* Map the delete command to catch clauses described in ARGS. */
2745 catch_command (arg
, from_tty
)
2749 catch_command_1 (arg
, 0, from_tty
);
2753 clear_command (arg
, from_tty
)
2757 register struct breakpoint
*b
, *b1
;
2758 struct symtabs_and_lines sals
;
2759 struct symtab_and_line sal
;
2760 register struct breakpoint
*found
;
2765 sals
= decode_line_spec (arg
, 1);
2769 sals
.sals
= (struct symtab_and_line
*) xmalloc (sizeof (struct symtab_and_line
));
2770 sal
.line
= default_breakpoint_line
;
2771 sal
.symtab
= default_breakpoint_symtab
;
2773 if (sal
.symtab
== 0)
2774 error ("No source file specified.");
2780 for (i
= 0; i
< sals
.nelts
; i
++)
2782 /* If exact pc given, clear bpts at that pc.
2783 But if sal.pc is zero, clear all bpts on specified line. */
2785 found
= (struct breakpoint
*) 0;
2786 while (breakpoint_chain
2788 ? breakpoint_chain
->address
== sal
.pc
2789 : (breakpoint_chain
->source_file
!= NULL
2790 && sal
.symtab
!= NULL
2791 && STREQ (breakpoint_chain
->source_file
,
2792 sal
.symtab
->filename
)
2793 && breakpoint_chain
->line_number
== sal
.line
)))
2795 b1
= breakpoint_chain
;
2796 breakpoint_chain
= b1
->next
;
2803 && b
->next
->type
!= bp_watchpoint
2804 && b
->next
->type
!= bp_hardware_watchpoint
2806 ? b
->next
->address
== sal
.pc
2807 : (b
->next
->source_file
!= NULL
2808 && sal
.symtab
!= NULL
2809 && STREQ (b
->next
->source_file
, sal
.symtab
->filename
)
2810 && b
->next
->line_number
== sal
.line
)))
2821 error ("No breakpoint at %s.", arg
);
2823 error ("No breakpoint at this line.");
2826 if (found
->next
) from_tty
= 1; /* Always report if deleted more than one */
2827 if (from_tty
) printf_unfiltered ("Deleted breakpoint%s ", found
->next
? "s" : "");
2828 breakpoints_changed ();
2831 if (from_tty
) printf_unfiltered ("%d ", found
->number
);
2833 delete_breakpoint (found
);
2836 if (from_tty
) putchar_unfiltered ('\n');
2838 free ((PTR
)sals
.sals
);
2841 /* Delete breakpoint in BS if they are `delete' breakpoints.
2842 This is called after any breakpoint is hit, or after errors. */
2845 breakpoint_auto_delete (bs
)
2848 for (; bs
; bs
= bs
->next
)
2849 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== delete
2851 delete_breakpoint (bs
->breakpoint_at
);
2854 /* Delete a breakpoint and clean up all traces of it in the data structures. */
2857 delete_breakpoint (bpt
)
2858 struct breakpoint
*bpt
;
2860 register struct breakpoint
*b
;
2864 remove_breakpoint (bpt
);
2866 if (breakpoint_chain
== bpt
)
2867 breakpoint_chain
= bpt
->next
;
2872 b
->next
= bpt
->next
;
2876 check_duplicates (bpt
->address
);
2877 /* If this breakpoint was inserted, and there is another breakpoint
2878 at the same address, we need to insert the other breakpoint. */
2880 && bpt
->type
!= bp_hardware_watchpoint
)
2883 if (b
->address
== bpt
->address
2885 && b
->enable
!= disabled
)
2888 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
2891 target_terminal_ours_for_output ();
2892 fprintf_unfiltered (gdb_stderr
, "Cannot insert breakpoint %d:\n", b
->number
);
2893 memory_error (val
, b
->address
); /* which bombs us out */
2900 free_command_lines (&bpt
->commands
);
2903 if (bpt
->cond_string
!= NULL
)
2904 free (bpt
->cond_string
);
2905 if (bpt
->addr_string
!= NULL
)
2906 free (bpt
->addr_string
);
2907 if (bpt
->exp_string
!= NULL
)
2908 free (bpt
->exp_string
);
2909 if (bpt
->source_file
!= NULL
)
2910 free (bpt
->source_file
);
2912 breakpoints_changed ();
2914 /* Be sure no bpstat's are pointing at it after it's been freed. */
2915 /* FIXME, how can we find all bpstat's?
2916 We just check stop_bpstat for now. */
2917 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
2918 if (bs
->breakpoint_at
== bpt
)
2919 bs
->breakpoint_at
= NULL
;
2924 delete_command (arg
, from_tty
)
2931 /* Ask user only if there are some breakpoints to delete. */
2933 || (breakpoint_chain
&& query ("Delete all breakpoints? ", 0, 0)))
2935 /* No arg; clear all breakpoints. */
2936 while (breakpoint_chain
)
2937 delete_breakpoint (breakpoint_chain
);
2941 map_breakpoint_numbers (arg
, delete_breakpoint
);
2944 /* Reset a breakpoint given it's struct breakpoint * BINT.
2945 The value we return ends up being the return value from catch_errors.
2946 Unused in this case. */
2949 breakpoint_re_set_one (bint
)
2952 struct breakpoint
*b
= (struct breakpoint
*)bint
; /* get past catch_errs */
2954 struct symtabs_and_lines sals
;
2956 enum enable save_enable
;
2961 if (b
->addr_string
== NULL
)
2963 /* Anything without a string can't be re-set. */
2964 delete_breakpoint (b
);
2967 /* In case we have a problem, disable this breakpoint. We'll restore
2968 its status if we succeed. */
2969 save_enable
= b
->enable
;
2970 b
->enable
= disabled
;
2973 sals
= decode_line_1 (&s
, 1, (struct symtab
*)NULL
, 0, (char ***)NULL
);
2974 for (i
= 0; i
< sals
.nelts
; i
++)
2976 resolve_sal_pc (&sals
.sals
[i
]);
2978 /* Reparse conditions, they might contain references to the
2980 if (b
->cond_string
!= NULL
)
2984 free ((PTR
)b
->cond
);
2985 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
2988 /* We need to re-set the breakpoint if the address changes...*/
2989 if (b
->address
!= sals
.sals
[i
].pc
2990 /* ...or new and old breakpoints both have source files, and
2991 the source file name or the line number changes... */
2992 || (b
->source_file
!= NULL
2993 && sals
.sals
[i
].symtab
!= NULL
2994 && (!STREQ (b
->source_file
, sals
.sals
[i
].symtab
->filename
)
2995 || b
->line_number
!= sals
.sals
[i
].line
)
2997 /* ...or we switch between having a source file and not having
2999 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
3002 if (b
->source_file
!= NULL
)
3003 free (b
->source_file
);
3004 if (sals
.sals
[i
].symtab
== NULL
)
3005 b
->source_file
= NULL
;
3008 savestring (sals
.sals
[i
].symtab
->filename
,
3009 strlen (sals
.sals
[i
].symtab
->filename
));
3010 b
->line_number
= sals
.sals
[i
].line
;
3011 b
->address
= sals
.sals
[i
].pc
;
3013 check_duplicates (b
->address
);
3017 /* Might be better to do this just once per breakpoint_re_set,
3018 rather than once for every breakpoint. */
3019 breakpoints_changed ();
3021 b
->enable
= save_enable
; /* Restore it, this worked. */
3023 free ((PTR
)sals
.sals
);
3027 case bp_hardware_watchpoint
:
3028 innermost_block
= NULL
;
3029 /* The issue arises of what context to evaluate this in. The same
3030 one as when it was set, but what does that mean when symbols have
3031 been re-read? We could save the filename and functionname, but
3032 if the context is more local than that, the best we could do would
3033 be something like how many levels deep and which index at that
3034 particular level, but that's going to be less stable than filenames
3035 or functionnames. */
3036 /* So for now, just use a global context. */
3037 b
->exp
= parse_expression (b
->exp_string
);
3038 b
->exp_valid_block
= innermost_block
;
3039 b
->val
= evaluate_expression (b
->exp
);
3040 release_value (b
->val
);
3041 if (VALUE_LAZY (b
->val
))
3042 value_fetch_lazy (b
->val
);
3044 if (b
->cond_string
!= NULL
)
3047 b
->cond
= parse_exp_1 (&s
, (struct block
*)0, 0);
3049 if (b
->enable
== enabled
)
3054 printf_filtered ("Deleting unknown breakpoint type %d\n", b
->type
);
3059 case bp_longjmp_resume
:
3060 case bp_watchpoint_scope
:
3062 delete_breakpoint (b
);
3069 /* Re-set all breakpoints after symbols have been re-loaded. */
3071 breakpoint_re_set ()
3073 struct breakpoint
*b
, *temp
;
3074 static char message1
[] = "Error in re-setting breakpoint %d:\n";
3075 char message
[sizeof (message1
) + 30 /* slop */];
3077 ALL_BREAKPOINTS_SAFE (b
, temp
)
3079 sprintf (message
, message1
, b
->number
); /* Format possible error msg */
3080 catch_errors (breakpoint_re_set_one
, (char *) b
, message
,
3084 create_longjmp_breakpoint("longjmp");
3085 create_longjmp_breakpoint("_longjmp");
3086 create_longjmp_breakpoint("siglongjmp");
3087 create_longjmp_breakpoint(NULL
);
3090 /* Took this out (temporaliy at least), since it produces an extra
3091 blank line at startup. This messes up the gdbtests. -PB */
3092 /* Blank line to finish off all those mention() messages we just printed. */
3093 printf_filtered ("\n");
3097 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
3098 If from_tty is nonzero, it prints a message to that effect,
3099 which ends with a period (no newline). */
3102 set_ignore_count (bptnum
, count
, from_tty
)
3103 int bptnum
, count
, from_tty
;
3105 register struct breakpoint
*b
;
3111 if (b
->number
== bptnum
)
3113 b
->ignore_count
= count
;
3116 else if (count
== 0)
3117 printf_filtered ("Will stop next time breakpoint %d is reached.",
3119 else if (count
== 1)
3120 printf_filtered ("Will ignore next crossing of breakpoint %d.",
3123 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
3125 breakpoints_changed ();
3129 error ("No breakpoint number %d.", bptnum
);
3132 /* Clear the ignore counts of all breakpoints. */
3134 breakpoint_clear_ignore_counts ()
3136 struct breakpoint
*b
;
3139 b
->ignore_count
= 0;
3142 /* Command to set ignore-count of breakpoint N to COUNT. */
3145 ignore_command (args
, from_tty
)
3153 error_no_arg ("a breakpoint number");
3155 num
= get_number (&p
);
3158 error ("Second argument (specified ignore-count) is missing.");
3160 set_ignore_count (num
,
3161 longest_to_int (value_as_long (parse_and_eval (p
))),
3163 printf_filtered ("\n");
3164 breakpoints_changed ();
3167 /* Call FUNCTION on each of the breakpoints
3168 whose numbers are given in ARGS. */
3171 map_breakpoint_numbers (args
, function
)
3173 void (*function
) PARAMS ((struct breakpoint
*));
3175 register char *p
= args
;
3178 register struct breakpoint
*b
;
3181 error_no_arg ("one or more breakpoint numbers");
3187 num
= get_number (&p1
);
3190 if (b
->number
== num
)
3192 struct breakpoint
*related_breakpoint
= b
->related_breakpoint
;
3194 if (related_breakpoint
)
3195 function (related_breakpoint
);
3198 printf_unfiltered ("No breakpoint number %d.\n", num
);
3205 enable_breakpoint (bpt
)
3206 struct breakpoint
*bpt
;
3208 FRAME save_selected_frame
= NULL
;
3209 int save_selected_frame_level
= -1;
3211 bpt
->enable
= enabled
;
3213 breakpoints_changed ();
3215 check_duplicates (bpt
->address
);
3216 if (bpt
->type
== bp_watchpoint
|| bpt
->type
== bp_hardware_watchpoint
)
3218 if (bpt
->exp_valid_block
!= NULL
)
3220 FRAME fr
= find_frame_addr_in_frame_chain (bpt
->watchpoint_frame
);
3224 Cannot enable watchpoint %d because the block in which its expression\n\
3225 is valid is not currently in scope.\n", bpt
->number
);
3226 bpt
->enable
= disabled
;
3230 save_selected_frame
= selected_frame
;
3231 save_selected_frame_level
= selected_frame_level
;
3232 select_frame (fr
, -1);
3235 value_free (bpt
->val
);
3237 bpt
->val
= evaluate_expression (bpt
->exp
);
3238 release_value (bpt
->val
);
3239 if (VALUE_LAZY (bpt
->val
))
3240 value_fetch_lazy (bpt
->val
);
3242 if (save_selected_frame_level
>= 0)
3243 select_frame (save_selected_frame
, save_selected_frame_level
);
3249 enable_command (args
, from_tty
)
3253 struct breakpoint
*bpt
;
3255 ALL_BREAKPOINTS (bpt
)
3260 case bp_hardware_watchpoint
:
3261 enable_breakpoint (bpt
);
3266 map_breakpoint_numbers (args
, enable_breakpoint
);
3270 disable_breakpoint (bpt
)
3271 struct breakpoint
*bpt
;
3273 /* Never disable a watchpoint scope breakpoint; we want to
3274 hit them when we leave scope so we can delete both the
3275 watchpoint and its scope breakpoint at that time. */
3276 if (bpt
->type
== bp_watchpoint_scope
)
3279 bpt
->enable
= disabled
;
3281 breakpoints_changed ();
3283 check_duplicates (bpt
->address
);
3288 disable_command (args
, from_tty
)
3292 register struct breakpoint
*bpt
;
3294 ALL_BREAKPOINTS (bpt
)
3299 case bp_hardware_watchpoint
:
3300 disable_breakpoint (bpt
);
3305 map_breakpoint_numbers (args
, disable_breakpoint
);
3309 enable_once_breakpoint (bpt
)
3310 struct breakpoint
*bpt
;
3312 bpt
->enable
= enabled
;
3313 bpt
->disposition
= disable
;
3315 check_duplicates (bpt
->address
);
3316 breakpoints_changed ();
3321 enable_once_command (args
, from_tty
)
3325 map_breakpoint_numbers (args
, enable_once_breakpoint
);
3329 enable_delete_breakpoint (bpt
)
3330 struct breakpoint
*bpt
;
3332 bpt
->enable
= enabled
;
3333 bpt
->disposition
= delete;
3335 check_duplicates (bpt
->address
);
3336 breakpoints_changed ();
3341 enable_delete_command (args
, from_tty
)
3345 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
3349 * Use default_breakpoint_'s, or nothing if they aren't valid.
3351 struct symtabs_and_lines
3352 decode_line_spec_1 (string
, funfirstline
)
3356 struct symtabs_and_lines sals
;
3358 error ("Empty line specification.");
3359 if (default_breakpoint_valid
)
3360 sals
= decode_line_1 (&string
, funfirstline
,
3361 default_breakpoint_symtab
, default_breakpoint_line
,
3364 sals
= decode_line_1 (&string
, funfirstline
,
3365 (struct symtab
*)NULL
, 0, (char ***)NULL
);
3367 error ("Junk at end of line specification: %s", string
);
3372 _initialize_breakpoint ()
3374 breakpoint_chain
= 0;
3375 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
3376 before a breakpoint is set. */
3377 breakpoint_count
= 0;
3379 add_com ("ignore", class_breakpoint
, ignore_command
,
3380 "Set ignore-count of breakpoint number N to COUNT.");
3382 add_com ("commands", class_breakpoint
, commands_command
,
3383 "Set commands to be executed when a breakpoint is hit.\n\
3384 Give breakpoint number as argument after \"commands\".\n\
3385 With no argument, the targeted breakpoint is the last one set.\n\
3386 The commands themselves follow starting on the next line.\n\
3387 Type a line containing \"end\" to indicate the end of them.\n\
3388 Give \"silent\" as the first line to make the breakpoint silent;\n\
3389 then no output is printed when it is hit, except what the commands print.");
3391 add_com ("condition", class_breakpoint
, condition_command
,
3392 "Specify breakpoint number N to break only if COND is true.\n\
3393 N is an integer; COND is an expression to be evaluated whenever\n\
3394 breakpoint N is reached. ");
3396 add_com ("tbreak", class_breakpoint
, tbreak_command
,
3397 "Set a temporary breakpoint. Args like \"break\" command.\n\
3398 Like \"break\" except the breakpoint is only temporary,\n\
3399 so it will be deleted when hit. Equivalent to \"break\" followed\n\
3400 by using \"enable delete\" on the breakpoint number.");
3402 add_prefix_cmd ("enable", class_breakpoint
, enable_command
,
3403 "Enable some breakpoints.\n\
3404 Give breakpoint numbers (separated by spaces) as arguments.\n\
3405 With no subcommand, breakpoints are enabled until you command otherwise.\n\
3406 This is used to cancel the effect of the \"disable\" command.\n\
3407 With a subcommand you can enable temporarily.",
3408 &enablelist
, "enable ", 1, &cmdlist
);
3410 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
,
3411 "Enable some breakpoints.\n\
3412 Give breakpoint numbers (separated by spaces) as arguments.\n\
3413 This is used to cancel the effect of the \"disable\" command.\n\
3414 May be abbreviated to simply \"enable\".\n",
3415 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
3417 add_cmd ("once", no_class
, enable_once_command
,
3418 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
3419 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
3422 add_cmd ("delete", no_class
, enable_delete_command
,
3423 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
3424 If a breakpoint is hit while enabled in this fashion, it is deleted.",
3427 add_cmd ("delete", no_class
, enable_delete_command
,
3428 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
3429 If a breakpoint is hit while enabled in this fashion, it is deleted.",
3432 add_cmd ("once", no_class
, enable_once_command
,
3433 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
3434 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
3437 add_prefix_cmd ("disable", class_breakpoint
, disable_command
,
3438 "Disable some breakpoints.\n\
3439 Arguments are breakpoint numbers with spaces in between.\n\
3440 To disable all breakpoints, give no argument.\n\
3441 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
3442 &disablelist
, "disable ", 1, &cmdlist
);
3443 add_com_alias ("dis", "disable", class_breakpoint
, 1);
3444 add_com_alias ("disa", "disable", class_breakpoint
, 1);
3446 add_cmd ("breakpoints", class_alias
, disable_command
,
3447 "Disable some breakpoints.\n\
3448 Arguments are breakpoint numbers with spaces in between.\n\
3449 To disable all breakpoints, give no argument.\n\
3450 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
3451 This command may be abbreviated \"disable\".",
3454 add_prefix_cmd ("delete", class_breakpoint
, delete_command
,
3455 "Delete some breakpoints or auto-display expressions.\n\
3456 Arguments are breakpoint numbers with spaces in between.\n\
3457 To delete all breakpoints, give no argument.\n\
3459 Also a prefix command for deletion of other GDB objects.\n\
3460 The \"unset\" command is also an alias for \"delete\".",
3461 &deletelist
, "delete ", 1, &cmdlist
);
3462 add_com_alias ("d", "delete", class_breakpoint
, 1);
3464 add_cmd ("breakpoints", class_alias
, delete_command
,
3465 "Delete some breakpoints or auto-display expressions.\n\
3466 Arguments are breakpoint numbers with spaces in between.\n\
3467 To delete all breakpoints, give no argument.\n\
3468 This command may be abbreviated \"delete\".",
3471 add_com ("clear", class_breakpoint
, clear_command
,
3472 "Clear breakpoint at specified line or function.\n\
3473 Argument may be line number, function name, or \"*\" and an address.\n\
3474 If line number is specified, all breakpoints in that line are cleared.\n\
3475 If function is specified, breakpoints at beginning of function are cleared.\n\
3476 If an address is specified, breakpoints at that address are cleared.\n\n\
3477 With no argument, clears all breakpoints in the line that the selected frame\n\
3480 See also the \"delete\" command which clears breakpoints by number.");
3482 add_com ("break", class_breakpoint
, break_command
,
3483 "Set breakpoint at specified line or function.\n\
3484 Argument may be line number, function name, or \"*\" and an address.\n\
3485 If line number is specified, break at start of code for that line.\n\
3486 If function is specified, break at start of code for that function.\n\
3487 If an address is specified, break at that exact address.\n\
3488 With no arg, uses current execution address of selected stack frame.\n\
3489 This is useful for breaking on return to a stack frame.\n\
3491 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
3493 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
3494 add_com_alias ("b", "break", class_run
, 1);
3495 add_com_alias ("br", "break", class_run
, 1);
3496 add_com_alias ("bre", "break", class_run
, 1);
3497 add_com_alias ("brea", "break", class_run
, 1);
3499 add_info ("breakpoints", breakpoints_info
,
3500 "Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
3501 The \"Type\" column indicates one of:\n\
3502 \tbreakpoint - normal breakpoint\n\
3503 \twatchpoint - watchpoint\n\
3504 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
3505 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
3506 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
3507 address and file/line number respectively.\n\n\
3508 Convenience variable \"$_\" and default examine address for \"x\"\n\
3509 are set to the address of the last breakpoint listed.\n\n\
3510 Convenience variable \"$bpnum\" contains the number of the last\n\
3513 #if MAINTENANCE_CMDS
3515 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
,
3516 "Status of all breakpoints, or breakpoint number NUMBER.\n\
3517 The \"Type\" column indicates one of:\n\
3518 \tbreakpoint - normal breakpoint\n\
3519 \twatchpoint - watchpoint\n\
3520 \tlongjmp - internal breakpoint used to step through longjmp()\n\
3521 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
3522 \tuntil - internal breakpoint used by the \"until\" command\n\
3523 \tfinish - internal breakpoint used by the \"finish\" command\n\
3524 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
3525 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
3526 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
3527 address and file/line number respectively.\n\n\
3528 Convenience variable \"$_\" and default examine address for \"x\"\n\
3529 are set to the address of the last breakpoint listed.\n\n\
3530 Convenience variable \"$bpnum\" contains the number of the last\n\
3532 &maintenanceinfolist
);
3534 #endif /* MAINTENANCE_CMDS */
3536 add_com ("catch", class_breakpoint
, catch_command
,
3537 "Set breakpoints to catch exceptions that are raised.\n\
3538 Argument may be a single exception to catch, multiple exceptions\n\
3539 to catch, or the default exception \"default\". If no arguments\n\
3540 are given, breakpoints are set at all exception handlers catch clauses\n\
3541 within the current scope.\n\
3543 A condition specified for the catch applies to all breakpoints set\n\
3544 with this command\n\
3546 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
3548 add_com ("watch", class_breakpoint
, watch_command
,
3549 "Set a watchpoint for an expression.\n\
3550 A watchpoint stops execution of your program whenever the value of\n\
3551 an expression changes.");
3553 add_info ("watchpoints", breakpoints_info
,
3554 "Synonym for ``info breakpoints''.");
3557 /* OK, when we call objfile_relocate, we need to relocate breakpoints
3558 too. breakpoint_re_set is not a good choice--for example, if
3559 addr_string contains just a line number without a file name the
3560 breakpoint might get set in a different file. In general, there is
3561 no need to go all the way back to the user's string (though this might
3562 work if some effort were made to canonicalize it), since symtabs and
3563 everything except addresses are still valid.
3565 Probably the best way to solve this is to have each breakpoint save
3566 the objfile and the section number that was used to set it (if set
3567 by "*addr", probably it is best to use find_pc_line to get a symtab
3568 and use the objfile and block_line_section for that symtab). Then
3569 objfile_relocate can call fixup_breakpoints with the objfile and
3570 the new_offsets, and it can relocate only the appropriate breakpoints. */
3572 #ifdef IBM6000_TARGET
3573 /* But for now, just kludge it based on the concept that before an
3574 objfile is relocated the breakpoint is below 0x10000000, and afterwards
3575 it is higher, so that way we only relocate each breakpoint once. */
3578 fixup_breakpoints (low
, high
, delta
)
3583 struct breakpoint
*b
;
3587 if (b
->address
>= low
&& b
->address
<= high
)
3588 b
->address
+= delta
;