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"
38 /* local function prototypes */
41 catch_command_1
PARAMS ((char *, int, int));
44 enable_delete_command
PARAMS ((char *, int));
47 enable_delete_breakpoint
PARAMS ((struct breakpoint
*));
50 enable_once_command
PARAMS ((char *, int));
53 enable_once_breakpoint
PARAMS ((struct breakpoint
*));
56 disable_command
PARAMS ((char *, int));
59 disable_breakpoint
PARAMS ((struct breakpoint
*));
62 enable_command
PARAMS ((char *, int));
65 enable_breakpoint
PARAMS ((struct breakpoint
*));
68 map_breakpoint_numbers
PARAMS ((char *, void (*)(struct breakpoint
*)));
71 ignore_command
PARAMS ((char *, int));
74 breakpoint_re_set_one
PARAMS ((char *));
77 delete_command
PARAMS ((char *, int));
80 clear_command
PARAMS ((char *, int));
83 catch_command
PARAMS ((char *, int));
85 static struct symtabs_and_lines
86 get_catch_sals
PARAMS ((int));
89 watch_command
PARAMS ((char *, int));
92 tbreak_command
PARAMS ((char *, int));
95 break_command_1
PARAMS ((char *, int, int));
98 mention
PARAMS ((struct breakpoint
*));
100 static struct breakpoint
*
101 set_raw_breakpoint
PARAMS ((struct symtab_and_line
));
104 check_duplicates
PARAMS ((CORE_ADDR
));
107 describe_other_breakpoints
PARAMS ((CORE_ADDR
));
110 breakpoints_info
PARAMS ((char *, int));
113 breakpoint_1
PARAMS ((int, int));
116 bpstat_alloc
PARAMS ((struct breakpoint
*, bpstat
));
119 breakpoint_cond_eval
PARAMS ((char *));
122 cleanup_executing_breakpoints
PARAMS ((int));
125 commands_command
PARAMS ((char *, int));
128 condition_command
PARAMS ((char *, int));
131 get_number
PARAMS ((char **));
134 set_breakpoint_count
PARAMS ((int));
137 extern int addressprint
; /* Print machine addresses? */
138 extern int demangle
; /* Print de-mangled symbol names? */
140 /* Are we executing breakpoint commands? */
141 static int executing_breakpoint_commands
;
143 /* Walk the following statement or block through all breakpoints.
144 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
147 #define ALL_BREAKPOINTS(b) for (b = breakpoint_chain; b; b = b->next)
149 #define ALL_BREAKPOINTS_SAFE(b,tmp) \
150 for (b = breakpoint_chain; \
151 b? (tmp=b->next, 1): 0; \
154 /* Chain of all breakpoints defined. */
156 struct breakpoint
*breakpoint_chain
;
158 /* Number of last breakpoint made. */
160 static int breakpoint_count
;
162 /* Set breakpoint count to NUM. */
164 set_breakpoint_count (num
)
167 breakpoint_count
= num
;
168 set_internalvar (lookup_internalvar ("bpnum"),
169 value_from_longest (builtin_type_int
, (LONGEST
) num
));
172 /* Default address, symtab and line to put a breakpoint at
173 for "break" command with no arg.
174 if default_breakpoint_valid is zero, the other three are
175 not valid, and "break" with no arg is an error.
177 This set by print_stack_frame, which calls set_default_breakpoint. */
179 int default_breakpoint_valid
;
180 CORE_ADDR default_breakpoint_address
;
181 struct symtab
*default_breakpoint_symtab
;
182 int default_breakpoint_line
;
184 /* Flag indicating extra verbosity for xgdb. */
185 extern int xgdb_verbose
;
187 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
188 Advance *PP after the string and any trailing whitespace.
190 Currently the string can either be a number or "$" followed by the name
191 of a convenience variable. Making it an expression wouldn't work well
192 for map_breakpoint_numbers (e.g. "4 + 5 + 6"). */
201 /* Empty line means refer to the last breakpoint. */
202 return breakpoint_count
;
205 /* Make a copy of the name, so we can null-terminate it
206 to pass to lookup_internalvar(). */
211 while (isalnum (*p
) || *p
== '_')
213 varname
= (char *) alloca (p
- start
+ 1);
214 strncpy (varname
, start
, p
- start
);
215 varname
[p
- start
] = '\0';
216 val
= value_of_internalvar (lookup_internalvar (varname
));
217 if (TYPE_CODE (VALUE_TYPE (val
)) != TYPE_CODE_INT
)
219 "Convenience variables used to specify breakpoints must have integer values."
221 retval
= (int) value_as_long (val
);
227 while (*p
>= '0' && *p
<= '9')
230 /* There is no number here. (e.g. "cond a == b"). */
231 error_no_arg ("breakpoint number");
234 if (!(isspace (*p
) || *p
== '\0'))
235 error ("breakpoint number expected");
242 /* condition N EXP -- set break condition of breakpoint N to EXP. */
245 condition_command (arg
, from_tty
)
249 register struct breakpoint
*b
;
254 error_no_arg ("breakpoint number");
257 bnum
= get_number (&p
);
260 if (b
->number
== bnum
)
267 if (b
->cond_string
!= NULL
)
268 free ((PTR
)b
->cond_string
);
273 b
->cond_string
= NULL
;
275 printf_filtered ("Breakpoint %d now unconditional.\n", bnum
);
280 /* I don't know if it matters whether this is the string the user
281 typed in or the decompiled expression. */
282 b
->cond_string
= savestring (arg
, strlen (arg
));
283 b
->cond
= parse_exp_1 (&arg
, block_for_pc (b
->address
), 0);
285 error ("Junk at end of expression");
290 error ("No breakpoint number %d.", bnum
);
295 commands_command (arg
, from_tty
)
299 register struct breakpoint
*b
;
302 struct command_line
*l
;
304 /* If we allowed this, we would have problems with when to
305 free the storage, if we change the commands currently
308 if (executing_breakpoint_commands
)
309 error ("Can't use the \"commands\" command among a breakpoint's commands.");
312 bnum
= get_number (&p
);
314 error ("Unexpected extra arguments following breakpoint number.");
317 if (b
->number
== bnum
)
319 if (from_tty
&& input_from_terminal_p ())
320 printf_filtered ("Type commands for when breakpoint %d is hit, one per line.\n\
321 End with a line saying just \"end\".\n", bnum
);
322 l
= read_command_lines ();
323 free_command_lines (&b
->commands
);
327 error ("No breakpoint number %d.", bnum
);
330 extern int memory_breakpoint_size
; /* from mem-break.c */
332 /* Like target_read_memory() but if breakpoints are inserted, return
333 the shadow contents instead of the breakpoints themselves.
335 Read "memory data" from whatever target or inferior we have.
336 Returns zero if successful, errno value if not. EIO is used
337 for address out of bounds. If breakpoints are inserted, returns
338 shadow contents, not the breakpoints themselves. From breakpoint.c. */
341 read_memory_nobpt (memaddr
, myaddr
, len
)
347 struct breakpoint
*b
;
349 if (memory_breakpoint_size
< 0)
350 /* No breakpoints on this machine. FIXME: This should be
351 dependent on the debugging target. Probably want
352 target_insert_breakpoint to return a size, saying how many
353 bytes of the shadow contents are used, or perhaps have
354 something like target_xfer_shadow. */
355 return target_read_memory (memaddr
, myaddr
, len
);
359 if (b
->type
== bp_watchpoint
|| !b
->inserted
)
361 else if (b
->address
+ memory_breakpoint_size
<= memaddr
)
362 /* The breakpoint is entirely before the chunk of memory
365 else if (b
->address
>= memaddr
+ len
)
366 /* The breakpoint is entirely after the chunk of memory we
371 /* Copy the breakpoint from the shadow contents, and recurse
372 for the things before and after. */
374 /* Addresses and length of the part of the breakpoint that
376 CORE_ADDR membpt
= b
->address
;
377 unsigned int bptlen
= memory_breakpoint_size
;
378 /* Offset within shadow_contents. */
381 if (membpt
< memaddr
)
383 /* Only copy the second part of the breakpoint. */
384 bptlen
-= memaddr
- membpt
;
385 bptoffset
= memaddr
- membpt
;
389 if (membpt
+ bptlen
> memaddr
+ len
)
391 /* Only copy the first part of the breakpoint. */
392 bptlen
-= (membpt
+ bptlen
) - (memaddr
+ len
);
395 memcpy (myaddr
+ membpt
- memaddr
,
396 b
->shadow_contents
+ bptoffset
, bptlen
);
398 if (membpt
> memaddr
)
400 /* Copy the section of memory before the breakpoint. */
401 status
= read_memory_nobpt (memaddr
, myaddr
, membpt
- memaddr
);
406 if (membpt
+ bptlen
< memaddr
+ len
)
408 /* Copy the section of memory after the breakpoint. */
409 status
= read_memory_nobpt
411 myaddr
+ membpt
+ bptlen
- memaddr
,
412 memaddr
+ len
- (membpt
+ bptlen
));
419 /* Nothing overlaps. Just call read_memory_noerr. */
420 return target_read_memory (memaddr
, myaddr
, len
);
423 /* insert_breakpoints is used when starting or continuing the program.
424 remove_breakpoints is used when the program stops.
425 Both return zero if successful,
426 or an `errno' value if could not write the inferior. */
429 insert_breakpoints ()
431 register struct breakpoint
*b
;
433 int disabled_breaks
= 0;
436 if (b
->type
!= bp_watchpoint
437 && b
->enable
!= disabled
441 val
= target_insert_breakpoint(b
->address
, b
->shadow_contents
);
444 /* Can't set the breakpoint. */
445 #if defined (DISABLE_UNSETTABLE_BREAK)
446 if (DISABLE_UNSETTABLE_BREAK (b
->address
))
449 b
->enable
= disabled
;
450 if (!disabled_breaks
)
453 "Cannot insert breakpoint %d:\n", b
->number
);
454 printf_filtered ("Disabling shared library breakpoints:\n");
457 printf_filtered ("%d ", b
->number
);
462 fprintf (stderr
, "Cannot insert breakpoint %d:\n", b
->number
);
463 #ifdef ONE_PROCESS_WRITETEXT
465 "The same program may be running in another process.\n");
467 memory_error (val
, b
->address
); /* which bombs us out */
474 printf_filtered ("\n");
479 remove_breakpoints ()
481 register struct breakpoint
*b
;
484 #ifdef BREAKPOINT_DEBUG
485 printf ("Removing breakpoints.\n");
486 #endif /* BREAKPOINT_DEBUG */
489 if (b
->type
!= bp_watchpoint
&& b
->inserted
)
491 val
= target_remove_breakpoint(b
->address
, b
->shadow_contents
);
495 #ifdef BREAKPOINT_DEBUG
496 printf ("Removed breakpoint at %s",
497 local_hex_string(b
->address
));
498 printf (", shadow %s",
499 local_hex_string(b
->shadow_contents
[0]));
501 local_hex_string(b
->shadow_contents
[1]));
502 #endif /* BREAKPOINT_DEBUG */
508 /* Clear the "inserted" flag in all breakpoints.
509 This is done when the inferior is loaded. */
512 mark_breakpoints_out ()
514 register struct breakpoint
*b
;
520 /* breakpoint_here_p (PC) returns 1 if an enabled breakpoint exists at PC.
521 When continuing from a location with a breakpoint,
522 we actually single step once before calling insert_breakpoints. */
525 breakpoint_here_p (pc
)
528 register struct breakpoint
*b
;
531 if (b
->enable
!= disabled
&& b
->address
== pc
)
537 /* bpstat stuff. External routines' interfaces are documented
540 /* Clear a bpstat so that it says we are not at any breakpoint.
541 Also free any storage that is part of a bpstat. */
556 if (p
->old_val
!= NULL
)
557 value_free (p
->old_val
);
564 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
565 is part of the bpstat is copied as well. */
578 for (; bs
!= NULL
; bs
= bs
->next
)
580 tmp
= (bpstat
) xmalloc (sizeof (*tmp
));
581 memcpy (tmp
, bs
, sizeof (*tmp
));
583 /* This is the first thing in the chain. */
593 /* Find the bpstat associated with this breakpoint */
596 bpstat_find_breakpoint(bsp
, breakpoint
)
598 struct breakpoint
*breakpoint
;
600 if (bsp
== NULL
) return NULL
;
602 for (;bsp
!= NULL
; bsp
= bsp
->next
) {
603 if (bsp
->breakpoint_at
== breakpoint
) return bsp
;
608 /* Return the breakpoint number of the first breakpoint we are stopped
609 at. *BSP upon return is a bpstat which points to the remaining
610 breakpoints stopped at (but which is not guaranteed to be good for
611 anything but further calls to bpstat_num).
612 Return 0 if passed a bpstat which does not indicate any breakpoints. */
618 struct breakpoint
*b
;
621 return 0; /* No more breakpoint values */
624 b
= (*bsp
)->breakpoint_at
;
627 return -1; /* breakpoint that's been deleted since */
629 return b
->number
; /* We have its number */
633 /* Modify BS so that the actions will not be performed. */
636 bpstat_clear_actions (bs
)
639 for (; bs
!= NULL
; bs
= bs
->next
)
642 if (bs
->old_val
!= NULL
)
644 value_free (bs
->old_val
);
650 /* Stub for cleaning up our state if we error-out of a breakpoint command */
653 cleanup_executing_breakpoints (ignore
)
656 executing_breakpoint_commands
= 0;
659 /* Execute all the commands associated with all the breakpoints at this
660 location. Any of these commands could cause the process to proceed
661 beyond this point, etc. We look out for such changes by checking
662 the global "breakpoint_proceeded" after each command. */
665 bpstat_do_actions (bsp
)
669 struct cleanup
*old_chain
;
671 executing_breakpoint_commands
= 1;
672 old_chain
= make_cleanup (cleanup_executing_breakpoints
, 0);
677 breakpoint_proceeded
= 0;
678 for (; bs
!= NULL
; bs
= bs
->next
)
682 char *line
= bs
->commands
->line
;
683 bs
->commands
= bs
->commands
->next
;
684 execute_command (line
, 0);
685 /* If the inferior is proceeded by the command, bomb out now.
686 The bpstat chain has been blown away by wait_for_inferior.
687 But since execution has stopped again, there is a new bpstat
688 to look at, so start over. */
689 if (breakpoint_proceeded
)
694 executing_breakpoint_commands
= 0;
695 discard_cleanups (old_chain
);
698 /* This is the normal print_it function for a bpstat. In the future,
699 much of this logic could (should?) be moved to bpstat_stop_status,
700 by having it set different print_it functions. */
706 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
707 which has since been deleted. */
708 if (bs
->breakpoint_at
== NULL
709 || (bs
->breakpoint_at
->type
!= bp_breakpoint
710 && bs
->breakpoint_at
->type
!= bp_watchpoint
))
713 if (bs
->breakpoint_at
->type
== bp_breakpoint
)
715 /* I think the user probably only wants to see one breakpoint
716 number, not all of them. */
717 printf_filtered ("\nBreakpoint %d, ", bs
->breakpoint_at
->number
);
721 if (bs
->old_val
!= NULL
)
723 printf_filtered ("\nWatchpoint %d, ", bs
->breakpoint_at
->number
);
724 print_expression (bs
->breakpoint_at
->exp
, stdout
);
725 printf_filtered ("\nOld value = ");
726 value_print (bs
->old_val
, stdout
, 0, Val_pretty_default
);
727 printf_filtered ("\nNew value = ");
728 value_print (bs
->breakpoint_at
->val
, stdout
, 0,
730 printf_filtered ("\n");
731 value_free (bs
->old_val
);
735 /* We can't deal with it. Maybe another member of the bpstat chain can. */
739 /* Print a message indicating what happened. Returns nonzero to
740 say that only the source line should be printed after this (zero
741 return means print the frame as well as the source line). */
742 /* Currently we always return zero. */
752 val
= (*bs
->print_it
) (bs
);
756 /* Maybe another breakpoint in the chain caused us to stop.
757 (Currently all watchpoints go on the bpstat whether hit or
758 not. That probably could (should) be changed, provided care is taken
759 with respect to bpstat_explains_signal). */
761 return bpstat_print (bs
->next
);
763 /* We reached the end of the chain without printing anything. */
767 /* Evaluate the expression EXP and return 1 if value is zero.
768 This is used inside a catch_errors to evaluate the breakpoint condition.
769 The argument is a "struct expression *" that has been cast to char * to
770 make it pass through catch_errors. */
773 breakpoint_cond_eval (exp
)
776 return !value_true (evaluate_expression ((struct expression
*)exp
));
779 /* Allocate a new bpstat and chain it to the current one. */
782 bpstat_alloc (b
, cbs
)
783 register struct breakpoint
*b
;
784 bpstat cbs
; /* Current "bs" value */
788 bs
= (bpstat
) xmalloc (sizeof (*bs
));
790 bs
->breakpoint_at
= b
;
791 /* If the condition is false, etc., don't do the commands. */
794 bs
->print_it
= print_it_normal
;
798 /* Return the frame which we can use to evaluate the expression
799 whose valid block is valid_block, or NULL if not in scope.
801 This whole concept is probably not the way to do things (it is incredibly
802 slow being the main reason, not to mention fragile (e.g. the sparc
803 frame pointer being fetched as 0 bug causes it to stop)). Instead,
804 introduce a version of "struct frame" which survives over calls to the
805 inferior, but which is better than FRAME_ADDR in the sense that it lets
806 us evaluate expressions relative to that frame (on some machines, it
807 can just be a FRAME_ADDR). Save one of those instead of (or in addition
808 to) the exp_valid_block, and then use it to evaluate the watchpoint
809 expression, with no need to do all this backtracing every time.
811 Or better yet, what if it just copied the struct frame and its next
812 frame? Off the top of my head, I would think that would work
813 because things like (a29k) rsize and msize, or (sparc) bottom just
814 depend on the frame, and aren't going to be different just because
815 the inferior has done something. Trying to recalculate them
816 strikes me as a lot of work, possibly even impossible. Saving the
817 next frame is needed at least on a29k, where get_saved_register
818 uses fi->next->saved_msp. For figuring out whether that frame is
819 still on the stack, I guess this needs to be machine-specific (e.g.
822 read_fp () INNER_THAN watchpoint_frame->frame
824 would generally work.
826 Of course the scope of the expression could be less than a whole
827 function; perhaps if the innermost frame is the one which the
828 watchpoint is relative to (another machine-specific thing, usually
830 FRAMELESS_FUNCTION_INVOCATION (get_current_frame(), fromleaf)
831 read_fp () == wp_frame->frame
834 ), *then* it could do a
836 contained_in (get_current_block (), wp->exp_valid_block).
841 within_scope (valid_block
)
842 struct block
*valid_block
;
844 FRAME fr
= get_current_frame ();
845 struct frame_info
*fi
= get_frame_info (fr
);
846 CORE_ADDR func_start
;
848 /* If caller_pc_valid is true, we are stepping through
849 a function prologue, which is bounded by callee_func_start
850 (inclusive) and callee_prologue_end (exclusive).
851 caller_pc is the pc of the caller.
853 Yes, this is hairy. */
854 static int caller_pc_valid
= 0;
855 static CORE_ADDR caller_pc
;
856 static CORE_ADDR callee_func_start
;
857 static CORE_ADDR callee_prologue_end
;
859 find_pc_partial_function (fi
->pc
, (PTR
)NULL
, &func_start
, (CORE_ADDR
*)NULL
);
860 func_start
+= FUNCTION_START_OFFSET
;
861 if (fi
->pc
== func_start
)
863 /* We just called a function. The only other case I
864 can think of where the pc would equal the pc of the
865 start of a function is a frameless function (i.e.
866 no prologue) where we branch back to the start
867 of the function. In that case, SKIP_PROLOGUE won't
868 find one, and we'll clear caller_pc_valid a few lines
871 caller_pc
= SAVED_PC_AFTER_CALL (fr
);
872 callee_func_start
= func_start
;
873 SKIP_PROLOGUE (func_start
);
874 callee_prologue_end
= func_start
;
878 if (fi
->pc
< callee_func_start
879 || fi
->pc
>= callee_prologue_end
)
883 if (contained_in (block_for_pc (caller_pc_valid
890 fr
= get_prev_frame (fr
);
892 /* If any active frame is in the exp_valid_block, then it's
893 OK. Note that this might not be the same invocation of
894 the exp_valid_block that we were watching a little while
895 ago, or the same one as when the watchpoint was set (e.g.
896 we are watching a local variable in a recursive function.
897 When we return from a recursive invocation, then we are
898 suddenly watching a different instance of the variable).
900 At least for now I am going to consider this a feature. */
901 for (; fr
!= NULL
; fr
= get_prev_frame (fr
))
903 fi
= get_frame_info (fr
);
904 if (contained_in (block_for_pc (fi
->pc
),
913 /* Possible return values for watchpoint_check (this can't be an enum
914 because of check_errors). */
915 /* The watchpoint has been disabled. */
916 #define WP_DISABLED 1
917 /* The value has changed. */
918 #define WP_VALUE_CHANGED 2
919 /* The value has not changed. */
920 #define WP_VALUE_NOT_CHANGED 3
922 /* Check watchpoint condition. */
927 bpstat bs
= (bpstat
) p
;
930 int within_current_scope
;
931 if (bs
->breakpoint_at
->exp_valid_block
== NULL
)
932 within_current_scope
= 1;
935 fr
= within_scope (bs
->breakpoint_at
->exp_valid_block
);
936 within_current_scope
= fr
!= NULL
;
937 if (within_current_scope
)
938 /* If we end up stopping, the current frame will get selected
939 in normal_stop. So this call to select_frame won't affect
941 select_frame (fr
, -1);
944 if (within_current_scope
)
946 /* We use value_{,free_to_}mark because it could be a
947 *long* time before we return to the command level and
948 call free_all_values. */
949 /* But couldn't we just call free_all_values instead? */
951 value mark
= value_mark ();
952 value new_val
= evaluate_expression (bs
->breakpoint_at
->exp
);
953 if (!value_equal (bs
->breakpoint_at
->val
, new_val
))
955 release_value (new_val
);
956 value_free_to_mark (mark
);
957 bs
->old_val
= bs
->breakpoint_at
->val
;
958 bs
->breakpoint_at
->val
= new_val
;
959 /* We will stop here */
960 return WP_VALUE_CHANGED
;
964 /* Nothing changed, don't do anything. */
965 value_free_to_mark (mark
);
966 /* We won't stop here */
967 return WP_VALUE_NOT_CHANGED
;
972 /* This seems like the only logical thing to do because
973 if we temporarily ignored the watchpoint, then when
974 we reenter the block in which it is valid it contains
975 garbage (in the case of a function, it may have two
976 garbage values, one before and one after the prologue).
977 So we can't even detect the first assignment to it and
978 watch after that (since the garbage may or may not equal
979 the first value assigned). */
980 bs
->breakpoint_at
->enable
= disabled
;
982 Watchpoint %d disabled because the program has left the block in\n\
983 which its expression is valid.\n", bs
->breakpoint_at
->number
);
988 /* This is used when everything which needs to be printed has
989 already been printed. But we still want to print the frame. */
997 /* This is used when nothing should be printed for this bpstat entry. */
1006 /* Determine whether we stopped at a breakpoint, etc, or whether we
1007 don't understand this stop. Result is a chain of bpstat's such that:
1009 if we don't understand the stop, the result is a null pointer.
1011 if we understand why we stopped, the result is not null, and
1012 the first element of the chain contains summary "stop" and
1013 "print" flags for the whole chain.
1015 Each element of the chain refers to a particular breakpoint or
1016 watchpoint at which we have stopped. (We may have stopped for
1017 several reasons concurrently.)
1019 Each element of the chain has valid next, breakpoint_at,
1020 commands, FIXME??? fields.
1026 bpstat_stop_status (pc
, frame_address
)
1028 FRAME_ADDR frame_address
;
1030 register struct breakpoint
*b
;
1032 #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
1033 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
1034 int real_breakpoint
= 0;
1036 /* Root of the chain of bpstat's */
1037 struct bpstat root_bs
[1];
1038 /* Pointer to the last thing in the chain currently. */
1039 bpstat bs
= root_bs
;
1041 /* Get the address where the breakpoint would have been. */
1042 bp_addr
= *pc
- DECR_PC_AFTER_BREAK
;
1046 if (b
->enable
== disabled
)
1049 if (b
->type
!= bp_watchpoint
&& b
->address
!= bp_addr
)
1052 /* Come here if it's a watchpoint, or if the break address matches */
1054 bs
= bpstat_alloc (b
, bs
); /* Alloc a bpstat to explain stop */
1059 if (b
->type
== bp_watchpoint
)
1061 static char message1
[] =
1062 "Error evaluating expression for watchpoint %d\n";
1063 char message
[sizeof (message1
) + 30 /* slop */];
1064 sprintf (message
, message1
, b
->number
);
1065 switch (catch_errors (watchpoint_check
, (char *) bs
, message
,
1069 /* We've already printed what needs to be printed. */
1070 bs
->print_it
= print_it_done
;
1073 case WP_VALUE_CHANGED
:
1076 case WP_VALUE_NOT_CHANGED
:
1078 bs
->print_it
= print_it_noop
;
1085 /* Error from catch_errors. */
1086 b
->enable
= disabled
;
1087 printf_filtered ("Watchpoint %d disabled.\n", b
->number
);
1088 /* We've already printed what needs to be printed. */
1089 bs
->print_it
= print_it_done
;
1094 #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
1096 real_breakpoint
= 1;
1099 if (b
->frame
&& b
->frame
!= frame_address
)
1107 /* Need to select the frame, with all that implies
1108 so that the conditions will have the right context. */
1109 select_frame (get_current_frame (), 0);
1111 = catch_errors (breakpoint_cond_eval
, (char *)(b
->cond
),
1112 "Error in testing breakpoint condition:\n",
1114 /* FIXME-someday, should give breakpoint # */
1117 if (b
->cond
&& value_is_zero
)
1121 else if (b
->ignore_count
> 0)
1128 /* We will stop here */
1129 if (b
->disposition
== disable
)
1130 b
->enable
= disabled
;
1131 bs
->commands
= b
->commands
;
1134 if (bs
->commands
&& STREQ ("silent", bs
->commands
->line
))
1136 bs
->commands
= bs
->commands
->next
;
1141 /* Print nothing for this entry if we dont stop or if we dont print. */
1142 if (bs
->stop
== 0 || bs
->print
== 0)
1143 bs
->print_it
= print_it_noop
;
1146 bs
->next
= NULL
; /* Terminate the chain */
1147 bs
= root_bs
->next
; /* Re-grab the head of the chain */
1148 #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
1151 if (real_breakpoint
)
1154 #if defined (SHIFT_INST_REGS)
1156 CORE_ADDR pc
= read_register (PC_REGNUM
);
1157 CORE_ADDR npc
= read_register (NPC_REGNUM
);
1160 write_register (NNPC_REGNUM
, npc
);
1161 write_register (NPC_REGNUM
, pc
);
1164 #else /* No SHIFT_INST_REGS. */
1166 #endif /* No SHIFT_INST_REGS. */
1169 #endif /* DECR_PC_AFTER_BREAK != 0. */
1173 /* Tell what to do about this bpstat. */
1178 /* Classify each bpstat as one of the following. */
1180 /* This bpstat element has no effect on the main_action. */
1183 /* There was a watchpoint, stop but don't print. */
1186 /* There was a watchpoint, stop and print. */
1189 /* There was a breakpoint but we're not stopping. */
1192 /* There was a breakpoint, stop but don't print. */
1195 /* There was a breakpoint, stop and print. */
1198 /* We hit the longjmp breakpoint. */
1201 /* We hit the longjmp_resume breakpoint. */
1204 /* This is just used to count how many enums there are. */
1208 /* Here is the table which drives this routine. So that we can
1209 format it pretty, we define some abbreviations for the
1210 enum bpstat_what codes. */
1211 #define keep_c BPSTAT_WHAT_KEEP_CHECKING
1212 #define stop_s BPSTAT_WHAT_STOP_SILENT
1213 #define stop_n BPSTAT_WHAT_STOP_NOISY
1214 #define single BPSTAT_WHAT_SINGLE
1215 #define setlr BPSTAT_WHAT_SET_LONGJMP_RESUME
1216 #define clrlr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
1217 #define clrlrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
1218 /* "Can't happen." Might want to print an error message.
1219 abort() is not out of the question, but chances are GDB is just
1220 a bit confused, not unusable. */
1221 #define err BPSTAT_WHAT_STOP_NOISY
1223 /* Given an old action and a class, come up with a new action. */
1224 static const enum bpstat_what_main_action
1225 table
[(int)class_last
][(int)BPSTAT_WHAT_LAST
] =
1228 /* keep_c stop_s stop_n single setlr clrlr clrlrs */
1230 /*no_effect*/ {keep_c
, stop_s
, stop_n
, single
, setlr
, clrlr
, clrlrs
},
1231 /*wp_silent*/ {stop_s
, stop_s
, stop_n
, stop_s
, stop_s
, stop_s
, stop_s
},
1232 /*wp_noisy*/ {stop_n
, stop_n
, stop_n
, stop_n
, stop_n
, stop_n
, stop_n
},
1233 /*bp_nostop*/ {single
, stop_s
, stop_n
, single
, setlr
, clrlrs
, clrlrs
},
1234 /*bp_silent*/ {stop_s
, stop_s
, stop_n
, stop_s
, stop_s
, stop_s
, stop_s
},
1235 /*bp_noisy*/ {stop_n
, stop_n
, stop_n
, stop_n
, stop_n
, stop_n
, stop_n
},
1236 /*long_jump*/ {setlr
, stop_s
, stop_n
, setlr
, err
, err
, err
},
1237 /*long_resume*/ {clrlr
, stop_s
, stop_n
, clrlrs
, err
, err
, err
}
1247 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
1248 int found_step_resume
= 0;
1250 for (; bs
!= NULL
; bs
= bs
->next
)
1252 enum class bs_class
;
1253 if (bs
->breakpoint_at
== NULL
)
1254 /* I suspect this can happen if it was a momentary breakpoint
1255 which has since been deleted. */
1257 switch (bs
->breakpoint_at
->type
)
1265 bs_class
= bp_noisy
;
1267 bs_class
= bp_silent
;
1270 bs_class
= bp_nostop
;
1276 bs_class
= wp_noisy
;
1278 bs_class
= wp_silent
;
1281 /* There was a watchpoint, but we're not stopping. This requires
1282 no further action. */
1283 bs_class
= no_effect
;
1286 bs_class
= long_jump
;
1288 case bp_longjmp_resume
:
1289 bs_class
= long_resume
;
1291 case bp_step_resume
:
1293 /* Need to temporarily disable this until we can fix the bug
1294 with nexting over a breakpoint with ->stop clear causing
1295 an infinite loop. For now, treat the breakpoint as having
1296 been hit even if the frame is wrong. */
1300 found_step_resume
= 1;
1301 /* We don't handle this via the main_action. */
1302 bs_class
= no_effect
;
1306 /* It is for the wrong frame. */
1307 bs_class
= bp_nostop
;
1311 current_action
= table
[(int)bs_class
][(int)current_action
];
1314 struct bpstat_what retval
;
1315 retval
.main_action
= current_action
;
1316 retval
.step_resume
= found_step_resume
;
1321 /* Nonzero if we should step constantly (e.g. watchpoints on machines
1322 without hardware support). This isn't related to a specific bpstat,
1323 just to things like whether watchpoints are set. */
1326 bpstat_should_step ()
1328 struct breakpoint
*b
;
1330 if (b
->enable
== enabled
&& b
->type
== bp_watchpoint
)
1335 /* Print information on breakpoint number BNUM, or -1 if all.
1336 If WATCHPOINTS is zero, process only breakpoints; if WATCHPOINTS
1337 is nonzero, process only watchpoints. */
1340 breakpoint_1 (bnum
, allflag
)
1344 register struct breakpoint
*b
;
1345 register struct command_line
*l
;
1346 register struct symbol
*sym
;
1347 CORE_ADDR last_addr
= (CORE_ADDR
)-1;
1348 int found_a_breakpoint
= 0;
1349 static char *bptypes
[] = {"breakpoint", "until", "finish", "watchpoint",
1350 "longjmp", "longjmp resume"};
1351 static char *bpdisps
[] = {"del", "dis", "keep"};
1352 static char bpenables
[] = "ny";
1353 char wrap_indent
[80];
1355 if (!breakpoint_chain
)
1357 printf_filtered ("No breakpoints or watchpoints.\n");
1363 || bnum
== b
->number
)
1365 /* We only print out user settable breakpoints unless the allflag is set. */
1367 && b
->type
!= bp_breakpoint
1368 && b
->type
!= bp_watchpoint
)
1371 if (!found_a_breakpoint
++)
1372 printf_filtered ("Num Type Disp Enb %sWhat\n",
1373 addressprint
? "Address " : "");
1375 printf_filtered ("%-3d %-14s %-4s %-3c ",
1377 bptypes
[(int)b
->type
],
1378 bpdisps
[(int)b
->disposition
],
1379 bpenables
[(int)b
->enable
]);
1380 strcpy (wrap_indent
, " ");
1382 strcat (wrap_indent
, " ");
1386 print_expression (b
->exp
, stdout
);
1392 case bp_longjmp_resume
:
1394 printf_filtered ("%s ", local_hex_string_custom(b
->address
, "08"));
1396 last_addr
= b
->address
;
1399 sym
= find_pc_function (b
->address
);
1402 fputs_filtered ("in ", stdout
);
1403 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stdout
);
1404 wrap_here (wrap_indent
);
1405 fputs_filtered (" at ", stdout
);
1407 fputs_filtered (b
->source_file
, stdout
);
1408 printf_filtered (":%d", b
->line_number
);
1411 print_address_symbolic (b
->address
, stdout
, demangle
, " ");
1414 printf_filtered ("\n");
1417 printf_filtered ("\tstop only in stack frame at %s\n",
1418 local_hex_string(b
->frame
));
1421 printf_filtered ("\tstop only if ");
1422 print_expression (b
->cond
, stdout
);
1423 printf_filtered ("\n");
1425 if (b
->ignore_count
)
1426 printf_filtered ("\tignore next %d hits\n", b
->ignore_count
);
1427 if ((l
= b
->commands
))
1430 fputs_filtered ("\t", stdout
);
1431 fputs_filtered (l
->line
, stdout
);
1432 fputs_filtered ("\n", stdout
);
1437 if (!found_a_breakpoint
1439 printf_filtered ("No breakpoint or watchpoint number %d.\n", bnum
);
1441 /* Compare against (CORE_ADDR)-1 in case some compiler decides
1442 that a comparison of an unsigned with -1 is always false. */
1443 if (last_addr
!= (CORE_ADDR
)-1)
1444 set_next_address (last_addr
);
1449 breakpoints_info (bnum_exp
, from_tty
)
1456 bnum
= parse_and_eval_address (bnum_exp
);
1458 breakpoint_1 (bnum
, 0);
1461 #if MAINTENANCE_CMDS
1465 maintenance_info_breakpoints (bnum_exp
, from_tty
)
1472 bnum
= parse_and_eval_address (bnum_exp
);
1474 breakpoint_1 (bnum
, 1);
1479 /* Print a message describing any breakpoints set at PC. */
1482 describe_other_breakpoints (pc
)
1483 register CORE_ADDR pc
;
1485 register int others
= 0;
1486 register struct breakpoint
*b
;
1489 if (b
->address
== pc
)
1493 printf ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
1495 if (b
->address
== pc
)
1500 (b
->enable
== disabled
) ? " (disabled)" : "",
1501 (others
> 1) ? "," : ((others
== 1) ? " and" : ""));
1503 printf ("also set at pc %s.\n", local_hex_string(pc
));
1507 /* Set the default place to put a breakpoint
1508 for the `break' command with no arguments. */
1511 set_default_breakpoint (valid
, addr
, symtab
, line
)
1514 struct symtab
*symtab
;
1517 default_breakpoint_valid
= valid
;
1518 default_breakpoint_address
= addr
;
1519 default_breakpoint_symtab
= symtab
;
1520 default_breakpoint_line
= line
;
1523 /* Rescan breakpoints at address ADDRESS,
1524 marking the first one as "first" and any others as "duplicates".
1525 This is so that the bpt instruction is only inserted once. */
1528 check_duplicates (address
)
1531 register struct breakpoint
*b
;
1532 register int count
= 0;
1534 if (address
== 0) /* Watchpoints are uninteresting */
1538 if (b
->enable
!= disabled
&& b
->address
== address
)
1541 b
->duplicate
= count
> 1;
1545 /* Low level routine to set a breakpoint.
1546 Takes as args the three things that every breakpoint must have.
1547 Returns the breakpoint object so caller can set other things.
1548 Does not set the breakpoint number!
1549 Does not print anything.
1551 ==> This routine should not be called if there is a chance of later
1552 error(); otherwise it leaves a bogus breakpoint on the chain. Validate
1553 your arguments BEFORE calling this routine! */
1555 static struct breakpoint
*
1556 set_raw_breakpoint (sal
)
1557 struct symtab_and_line sal
;
1559 register struct breakpoint
*b
, *b1
;
1561 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
1562 memset (b
, 0, sizeof (*b
));
1563 b
->address
= sal
.pc
;
1564 if (sal
.symtab
== NULL
)
1565 b
->source_file
= NULL
;
1567 b
->source_file
= savestring (sal
.symtab
->filename
,
1568 strlen (sal
.symtab
->filename
));
1569 b
->line_number
= sal
.line
;
1570 b
->enable
= enabled
;
1573 b
->ignore_count
= 0;
1577 /* Add this breakpoint to the end of the chain
1578 so that a list of breakpoints will come out in order
1579 of increasing numbers. */
1581 b1
= breakpoint_chain
;
1583 breakpoint_chain
= b
;
1591 check_duplicates (sal
.pc
);
1597 create_longjmp_breakpoint(func_name
)
1600 struct symtab_and_line sal
;
1601 struct breakpoint
*b
;
1602 static int internal_breakpoint_number
= -1;
1604 if (func_name
!= NULL
)
1606 struct minimal_symbol
*m
;
1608 m
= lookup_minimal_symbol(func_name
, (struct objfile
*)NULL
);
1610 sal
.pc
= SYMBOL_VALUE_ADDRESS (m
);
1620 b
= set_raw_breakpoint(sal
);
1623 b
->type
= func_name
!= NULL
? bp_longjmp
: bp_longjmp_resume
;
1624 b
->disposition
= donttouch
;
1625 b
->enable
= disabled
;
1628 b
->addr_string
= strsave(func_name
);
1629 b
->number
= internal_breakpoint_number
--;
1632 /* Call this routine when stepping and nexting to enable a breakpoint if we do
1633 a longjmp(). When we hit that breakpoint, call
1634 set_longjmp_resume_breakpoint() to figure out where we are going. */
1637 enable_longjmp_breakpoint()
1639 register struct breakpoint
*b
;
1642 if (b
->type
== bp_longjmp
)
1644 b
->enable
= enabled
;
1645 check_duplicates (b
->address
);
1650 disable_longjmp_breakpoint()
1652 register struct breakpoint
*b
;
1655 if ( b
->type
== bp_longjmp
1656 || b
->type
== bp_longjmp_resume
)
1658 b
->enable
= disabled
;
1659 check_duplicates (b
->address
);
1663 /* Call this after hitting the longjmp() breakpoint. Use this to set a new
1664 breakpoint at the target of the jmp_buf.
1666 FIXME - This ought to be done by setting a temporary breakpoint that gets
1667 deleted automatically...
1671 set_longjmp_resume_breakpoint(pc
, frame
)
1675 register struct breakpoint
*b
;
1678 if (b
->type
== bp_longjmp_resume
)
1681 b
->enable
= enabled
;
1683 b
->frame
= FRAME_FP(frame
);
1686 check_duplicates (b
->address
);
1691 /* Set a breakpoint that will evaporate an end of command
1692 at address specified by SAL.
1693 Restrict it to frame FRAME if FRAME is nonzero. */
1696 set_momentary_breakpoint (sal
, frame
, type
)
1697 struct symtab_and_line sal
;
1701 register struct breakpoint
*b
;
1702 b
= set_raw_breakpoint (sal
);
1704 b
->enable
= enabled
;
1705 b
->disposition
= donttouch
;
1706 b
->frame
= (frame
? FRAME_FP (frame
) : 0);
1712 clear_momentary_breakpoints ()
1714 register struct breakpoint
*b
;
1716 if (b
->disposition
== delete)
1718 delete_breakpoint (b
);
1724 /* Tell the user we have just set a breakpoint B. */
1727 struct breakpoint
*b
;
1732 printf_filtered ("Watchpoint %d: ", b
->number
);
1733 print_expression (b
->exp
, stdout
);
1736 printf_filtered ("Breakpoint %d at %s", b
->number
,
1737 local_hex_string(b
->address
));
1739 printf_filtered (": file %s, line %d.",
1740 b
->source_file
, b
->line_number
);
1745 case bp_longjmp_resume
:
1748 printf_filtered ("\n");
1752 /* Nobody calls this currently. */
1753 /* Set a breakpoint from a symtab and line.
1754 If TEMPFLAG is nonzero, it is a temporary breakpoint.
1755 ADDR_STRING is a malloc'd string holding the name of where we are
1756 setting the breakpoint. This is used later to re-set it after the
1757 program is relinked and symbols are reloaded.
1758 Print the same confirmation messages that the breakpoint command prints. */
1761 set_breakpoint (s
, line
, tempflag
, addr_string
)
1767 register struct breakpoint
*b
;
1768 struct symtab_and_line sal
;
1773 resolve_sal_pc (&sal
); /* Might error out */
1774 describe_other_breakpoints (sal
.pc
);
1776 b
= set_raw_breakpoint (sal
);
1777 set_breakpoint_count (breakpoint_count
+ 1);
1778 b
->number
= breakpoint_count
;
1779 b
->type
= bp_breakpoint
;
1781 b
->addr_string
= addr_string
;
1782 b
->enable
= enabled
;
1783 b
->disposition
= tempflag
? delete : donttouch
;
1789 /* Set a breakpoint according to ARG (function, linenum or *address)
1790 and make it temporary if TEMPFLAG is nonzero. */
1793 break_command_1 (arg
, tempflag
, from_tty
)
1795 int tempflag
, from_tty
;
1797 struct symtabs_and_lines sals
;
1798 struct symtab_and_line sal
;
1799 register struct expression
*cond
= 0;
1800 register struct breakpoint
*b
;
1802 /* Pointers in arg to the start, and one past the end, of the condition. */
1803 char *cond_start
= NULL
;
1805 /* Pointers in arg to the start, and one past the end,
1806 of the address part. */
1807 char *addr_start
= NULL
;
1809 struct cleanup
*old_chain
;
1810 struct cleanup
*canonical_strings_chain
;
1811 char **canonical
= (char **)NULL
;
1818 sal
.line
= sal
.pc
= sal
.end
= 0;
1821 /* If no arg given, or if first arg is 'if ', use the default breakpoint. */
1823 if (!arg
|| (arg
[0] == 'i' && arg
[1] == 'f'
1824 && (arg
[2] == ' ' || arg
[2] == '\t')))
1826 if (default_breakpoint_valid
)
1828 sals
.sals
= (struct symtab_and_line
*)
1829 xmalloc (sizeof (struct symtab_and_line
));
1830 sal
.pc
= default_breakpoint_address
;
1831 sal
.line
= default_breakpoint_line
;
1832 sal
.symtab
= default_breakpoint_symtab
;
1837 error ("No default breakpoint address now.");
1843 /* Force almost all breakpoints to be in terms of the
1844 current_source_symtab (which is decode_line_1's default). This
1845 should produce the results we want almost all of the time while
1846 leaving default_breakpoint_* alone. */
1847 if (default_breakpoint_valid
1848 && (!current_source_symtab
1849 || (arg
&& (*arg
== '+' || *arg
== '-'))))
1850 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
1851 default_breakpoint_line
, &canonical
);
1853 sals
= decode_line_1 (&arg
, 1, (struct symtab
*)NULL
, 0, &canonical
);
1861 /* Make sure that all storage allocated in decode_line_1 gets freed in case
1862 the following `for' loop errors out. */
1863 old_chain
= make_cleanup (free
, sals
.sals
);
1864 if (canonical
!= (char **)NULL
)
1866 make_cleanup (free
, canonical
);
1867 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
1868 for (i
= 0; i
< sals
.nelts
; i
++)
1870 if (canonical
[i
] != NULL
)
1871 make_cleanup (free
, canonical
[i
]);
1875 /* Resolve all line numbers to PC's, and verify that conditions
1876 can be parsed, before setting any breakpoints. */
1877 for (i
= 0; i
< sals
.nelts
; i
++)
1879 resolve_sal_pc (&sals
.sals
[i
]);
1883 if (arg
[0] == 'i' && arg
[1] == 'f'
1884 && (arg
[2] == ' ' || arg
[2] == '\t'))
1888 cond
= parse_exp_1 (&arg
, block_for_pc (sals
.sals
[i
].pc
), 0);
1892 error ("Junk at end of arguments.");
1896 /* Remove the canonical strings from the cleanup, they are needed below. */
1897 if (canonical
!= (char **)NULL
)
1898 discard_cleanups (canonical_strings_chain
);
1900 /* Now set all the breakpoints. */
1901 for (i
= 0; i
< sals
.nelts
; i
++)
1906 describe_other_breakpoints (sal
.pc
);
1908 b
= set_raw_breakpoint (sal
);
1909 set_breakpoint_count (breakpoint_count
+ 1);
1910 b
->number
= breakpoint_count
;
1911 b
->type
= bp_breakpoint
;
1914 /* If a canonical line spec is needed use that instead of the
1916 if (canonical
!= (char **)NULL
&& canonical
[i
] != NULL
)
1917 b
->addr_string
= canonical
[i
];
1918 else if (addr_start
)
1919 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
1921 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
1923 b
->enable
= enabled
;
1924 b
->disposition
= tempflag
? delete : donttouch
;
1931 printf ("Multiple breakpoints were set.\n");
1932 printf ("Use the \"delete\" command to delete unwanted breakpoints.\n");
1934 do_cleanups (old_chain
);
1937 /* Helper function for break_command_1 and disassemble_command. */
1940 resolve_sal_pc (sal
)
1941 struct symtab_and_line
*sal
;
1945 if (sal
->pc
== 0 && sal
->symtab
!= 0)
1947 pc
= find_line_pc (sal
->symtab
, sal
->line
);
1949 error ("No line %d in file \"%s\".",
1950 sal
->line
, sal
->symtab
->filename
);
1956 break_command (arg
, from_tty
)
1960 break_command_1 (arg
, 0, from_tty
);
1964 tbreak_command (arg
, from_tty
)
1968 break_command_1 (arg
, 1, from_tty
);
1973 watch_command (arg
, from_tty
)
1977 struct breakpoint
*b
;
1978 struct symtab_and_line sal
;
1979 struct expression
*exp
;
1980 struct block
*exp_valid_block
;
1987 /* Parse arguments. */
1988 innermost_block
= NULL
;
1989 exp
= parse_expression (arg
);
1990 exp_valid_block
= innermost_block
;
1991 val
= evaluate_expression (exp
);
1992 release_value (val
);
1993 if (VALUE_LAZY (val
))
1994 value_fetch_lazy (val
);
1996 /* Now set up the breakpoint. */
1997 b
= set_raw_breakpoint (sal
);
1998 set_breakpoint_count (breakpoint_count
+ 1);
1999 b
->number
= breakpoint_count
;
2000 b
->type
= bp_watchpoint
;
2001 b
->disposition
= donttouch
;
2003 b
->exp_valid_block
= exp_valid_block
;
2006 b
->cond_string
= NULL
;
2007 b
->exp_string
= savestring (arg
, strlen (arg
));
2012 * Helper routine for the until_command routine in infcmd.c. Here
2013 * because it uses the mechanisms of breakpoints.
2017 until_break_command (arg
, from_tty
)
2021 struct symtabs_and_lines sals
;
2022 struct symtab_and_line sal
;
2023 FRAME prev_frame
= get_prev_frame (selected_frame
);
2024 struct breakpoint
*breakpoint
;
2025 struct cleanup
*old_chain
;
2027 clear_proceed_status ();
2029 /* Set a breakpoint where the user wants it and at return from
2032 if (default_breakpoint_valid
)
2033 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
2034 default_breakpoint_line
, (char ***)NULL
);
2036 sals
= decode_line_1 (&arg
, 1, (struct symtab
*)NULL
, 0, (char ***)NULL
);
2038 if (sals
.nelts
!= 1)
2039 error ("Couldn't get information on specified line.");
2042 free ((PTR
)sals
.sals
); /* malloc'd, so freed */
2045 error ("Junk at end of arguments.");
2047 resolve_sal_pc (&sal
);
2049 breakpoint
= set_momentary_breakpoint (sal
, selected_frame
, bp_until
);
2051 old_chain
= make_cleanup(delete_breakpoint
, breakpoint
);
2053 /* Keep within the current frame */
2057 struct frame_info
*fi
;
2059 fi
= get_frame_info (prev_frame
);
2060 sal
= find_pc_line (fi
->pc
, 0);
2062 breakpoint
= set_momentary_breakpoint (sal
, prev_frame
, bp_until
);
2063 make_cleanup(delete_breakpoint
, breakpoint
);
2066 proceed (-1, -1, 0);
2067 do_cleanups(old_chain
);
2071 /* These aren't used; I don't konw what they were for. */
2072 /* Set a breakpoint at the catch clause for NAME. */
2074 catch_breakpoint (name
)
2080 disable_catch_breakpoint ()
2085 delete_catch_breakpoint ()
2090 enable_catch_breakpoint ()
2097 struct sal_chain
*next
;
2098 struct symtab_and_line sal
;
2102 /* This isn't used; I don't know what it was for. */
2103 /* For each catch clause identified in ARGS, run FUNCTION
2104 with that clause as an argument. */
2105 static struct symtabs_and_lines
2106 map_catch_names (args
, function
)
2110 register char *p
= args
;
2112 struct symtabs_and_lines sals
;
2114 struct sal_chain
*sal_chain
= 0;
2118 error_no_arg ("one or more catch names");
2126 /* Don't swallow conditional part. */
2127 if (p1
[0] == 'i' && p1
[1] == 'f'
2128 && (p1
[2] == ' ' || p1
[2] == '\t'))
2134 while (isalnum (*p1
) || *p1
== '_' || *p1
== '$')
2138 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
2139 error ("Arguments must be catch names.");
2145 struct sal_chain
*next
2146 = (struct sal_chain
*)alloca (sizeof (struct sal_chain
));
2147 next
->next
= sal_chain
;
2148 next
->sal
= get_catch_sal (p
);
2153 printf ("No catch clause for exception %s.\n", p
);
2158 while (*p
== ' ' || *p
== '\t') p
++;
2163 /* This shares a lot of code with `print_frame_label_vars' from stack.c. */
2165 static struct symtabs_and_lines
2166 get_catch_sals (this_level_only
)
2167 int this_level_only
;
2169 register struct blockvector
*bl
;
2170 register struct block
*block
;
2171 int index
, have_default
= 0;
2172 struct frame_info
*fi
;
2174 struct symtabs_and_lines sals
;
2175 struct sal_chain
*sal_chain
= 0;
2176 char *blocks_searched
;
2178 /* Not sure whether an error message is always the correct response,
2179 but it's better than a core dump. */
2180 if (selected_frame
== NULL
)
2181 error ("No selected frame.");
2182 block
= get_frame_block (selected_frame
);
2183 fi
= get_frame_info (selected_frame
);
2190 error ("No symbol table info available.\n");
2192 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
2193 blocks_searched
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
2194 memset (blocks_searched
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
2198 CORE_ADDR end
= BLOCK_END (block
) - 4;
2201 if (bl
!= blockvector_for_pc (end
, &index
))
2202 error ("blockvector blotch");
2203 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
2204 error ("blockvector botch");
2205 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
2208 /* Don't print out blocks that have gone by. */
2209 while (index
< last_index
2210 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
2213 while (index
< last_index
2214 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
2216 if (blocks_searched
[index
] == 0)
2218 struct block
*b
= BLOCKVECTOR_BLOCK (bl
, index
);
2221 register struct symbol
*sym
;
2223 nsyms
= BLOCK_NSYMS (b
);
2225 for (i
= 0; i
< nsyms
; i
++)
2227 sym
= BLOCK_SYM (b
, i
);
2228 if (STREQ (SYMBOL_NAME (sym
), "default"))
2234 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
2236 struct sal_chain
*next
= (struct sal_chain
*)
2237 alloca (sizeof (struct sal_chain
));
2238 next
->next
= sal_chain
;
2239 next
->sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
2243 blocks_searched
[index
] = 1;
2249 if (sal_chain
&& this_level_only
)
2252 /* After handling the function's top-level block, stop.
2253 Don't continue to its superblock, the block of
2254 per-file symbols. */
2255 if (BLOCK_FUNCTION (block
))
2257 block
= BLOCK_SUPERBLOCK (block
);
2262 struct sal_chain
*tmp_chain
;
2264 /* Count the number of entries. */
2265 for (index
= 0, tmp_chain
= sal_chain
; tmp_chain
;
2266 tmp_chain
= tmp_chain
->next
)
2270 sals
.sals
= (struct symtab_and_line
*)
2271 xmalloc (index
* sizeof (struct symtab_and_line
));
2272 for (index
= 0; sal_chain
; sal_chain
= sal_chain
->next
, index
++)
2273 sals
.sals
[index
] = sal_chain
->sal
;
2279 /* Commands to deal with catching exceptions. */
2282 catch_command_1 (arg
, tempflag
, from_tty
)
2287 /* First, translate ARG into something we can deal with in terms
2290 struct symtabs_and_lines sals
;
2291 struct symtab_and_line sal
;
2292 register struct expression
*cond
= 0;
2293 register struct breakpoint
*b
;
2297 sal
.line
= sal
.pc
= sal
.end
= 0;
2300 /* If no arg given, or if first arg is 'if ', all active catch clauses
2301 are breakpointed. */
2303 if (!arg
|| (arg
[0] == 'i' && arg
[1] == 'f'
2304 && (arg
[2] == ' ' || arg
[2] == '\t')))
2306 /* Grab all active catch clauses. */
2307 sals
= get_catch_sals (0);
2311 /* Grab selected catch clauses. */
2312 error ("catch NAME not implemented");
2314 /* This isn't used; I don't know what it was for. */
2315 sals
= map_catch_names (arg
, catch_breakpoint
);
2323 for (i
= 0; i
< sals
.nelts
; i
++)
2325 resolve_sal_pc (&sals
.sals
[i
]);
2329 if (arg
[0] == 'i' && arg
[1] == 'f'
2330 && (arg
[2] == ' ' || arg
[2] == '\t'))
2331 cond
= parse_exp_1 ((arg
+= 2, &arg
),
2332 block_for_pc (sals
.sals
[i
].pc
), 0);
2334 error ("Junk at end of arguments.");
2339 for (i
= 0; i
< sals
.nelts
; i
++)
2344 describe_other_breakpoints (sal
.pc
);
2346 b
= set_raw_breakpoint (sal
);
2347 set_breakpoint_count (breakpoint_count
+ 1);
2348 b
->number
= breakpoint_count
;
2349 b
->type
= bp_breakpoint
;
2351 b
->enable
= enabled
;
2352 b
->disposition
= tempflag
? delete : donttouch
;
2359 printf ("Multiple breakpoints were set.\n");
2360 printf ("Use the \"delete\" command to delete unwanted breakpoints.\n");
2362 free ((PTR
)sals
.sals
);
2366 /* These aren't used; I don't know what they were for. */
2367 /* Disable breakpoints on all catch clauses described in ARGS. */
2369 disable_catch (args
)
2372 /* Map the disable command to catch clauses described in ARGS. */
2375 /* Enable breakpoints on all catch clauses described in ARGS. */
2380 /* Map the disable command to catch clauses described in ARGS. */
2383 /* Delete breakpoints on all catch clauses in the active scope. */
2388 /* Map the delete command to catch clauses described in ARGS. */
2393 catch_command (arg
, from_tty
)
2397 catch_command_1 (arg
, 0, from_tty
);
2401 clear_command (arg
, from_tty
)
2405 register struct breakpoint
*b
, *b1
;
2406 struct symtabs_and_lines sals
;
2407 struct symtab_and_line sal
;
2408 register struct breakpoint
*found
;
2413 sals
= decode_line_spec (arg
, 1);
2417 sals
.sals
= (struct symtab_and_line
*) xmalloc (sizeof (struct symtab_and_line
));
2418 sal
.line
= default_breakpoint_line
;
2419 sal
.symtab
= default_breakpoint_symtab
;
2421 if (sal
.symtab
== 0)
2422 error ("No source file specified.");
2428 for (i
= 0; i
< sals
.nelts
; i
++)
2430 /* If exact pc given, clear bpts at that pc.
2431 But if sal.pc is zero, clear all bpts on specified line. */
2433 found
= (struct breakpoint
*) 0;
2434 while (breakpoint_chain
2436 ? breakpoint_chain
->address
== sal
.pc
2437 : (breakpoint_chain
->source_file
!= NULL
2438 && sal
.symtab
!= NULL
2439 && STREQ (breakpoint_chain
->source_file
,
2440 sal
.symtab
->filename
)
2441 && breakpoint_chain
->line_number
== sal
.line
)))
2443 b1
= breakpoint_chain
;
2444 breakpoint_chain
= b1
->next
;
2451 && b
->next
->type
!= bp_watchpoint
2453 ? b
->next
->address
== sal
.pc
2454 : (b
->next
->source_file
!= NULL
2455 && sal
.symtab
!= NULL
2456 && STREQ (b
->next
->source_file
, sal
.symtab
->filename
)
2457 && b
->next
->line_number
== sal
.line
)))
2468 error ("No breakpoint at %s.", arg
);
2470 error ("No breakpoint at this line.");
2473 if (found
->next
) from_tty
= 1; /* Always report if deleted more than one */
2474 if (from_tty
) printf ("Deleted breakpoint%s ", found
->next
? "s" : "");
2477 if (from_tty
) printf ("%d ", found
->number
);
2479 delete_breakpoint (found
);
2482 if (from_tty
) putchar ('\n');
2484 free ((PTR
)sals
.sals
);
2487 /* Delete breakpoint in BS if they are `delete' breakpoints.
2488 This is called after any breakpoint is hit, or after errors. */
2491 breakpoint_auto_delete (bs
)
2494 for (; bs
; bs
= bs
->next
)
2495 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== delete)
2496 delete_breakpoint (bs
->breakpoint_at
);
2499 /* Delete a breakpoint and clean up all traces of it in the data structures. */
2502 delete_breakpoint (bpt
)
2503 struct breakpoint
*bpt
;
2505 register struct breakpoint
*b
;
2509 target_remove_breakpoint(bpt
->address
, bpt
->shadow_contents
);
2511 if (breakpoint_chain
== bpt
)
2512 breakpoint_chain
= bpt
->next
;
2517 b
->next
= bpt
->next
;
2521 check_duplicates (bpt
->address
);
2522 /* If this breakpoint was inserted, and there is another breakpoint
2523 at the same address, we need to insert the other breakpoint. */
2527 if (b
->address
== bpt
->address
&& !b
->duplicate
)
2530 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
2533 fprintf (stderr
, "Cannot insert breakpoint %d:\n", b
->number
);
2534 memory_error (val
, b
->address
); /* which bombs us out */
2541 free_command_lines (&bpt
->commands
);
2544 if (bpt
->cond_string
!= NULL
)
2545 free (bpt
->cond_string
);
2546 if (bpt
->addr_string
!= NULL
)
2547 free (bpt
->addr_string
);
2548 if (bpt
->exp_string
!= NULL
)
2549 free (bpt
->exp_string
);
2550 if (bpt
->source_file
!= NULL
)
2551 free (bpt
->source_file
);
2553 if (xgdb_verbose
&& bpt
->type
== bp_breakpoint
)
2554 printf ("breakpoint #%d deleted\n", bpt
->number
);
2556 /* Be sure no bpstat's are pointing at it after it's been freed. */
2557 /* FIXME, how can we find all bpstat's? We just check stop_bpstat for now. */
2558 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
2559 if (bs
->breakpoint_at
== bpt
)
2560 bs
->breakpoint_at
= NULL
;
2565 delete_command (arg
, from_tty
)
2572 /* Ask user only if there are some breakpoints to delete. */
2574 || (breakpoint_chain
&& query ("Delete all breakpoints? ", 0, 0)))
2576 /* No arg; clear all breakpoints. */
2577 while (breakpoint_chain
)
2578 delete_breakpoint (breakpoint_chain
);
2582 map_breakpoint_numbers (arg
, delete_breakpoint
);
2585 /* Reset a breakpoint given it's struct breakpoint * BINT.
2586 The value we return ends up being the return value from catch_errors.
2587 Unused in this case. */
2590 breakpoint_re_set_one (bint
)
2593 struct breakpoint
*b
= (struct breakpoint
*)bint
; /* get past catch_errs */
2595 struct symtabs_and_lines sals
;
2597 enum enable save_enable
;
2602 if (b
->addr_string
== NULL
)
2604 /* Anything without a string can't be re-set. */
2605 delete_breakpoint (b
);
2608 /* In case we have a problem, disable this breakpoint. We'll restore
2609 its status if we succeed. */
2610 save_enable
= b
->enable
;
2611 b
->enable
= disabled
;
2614 sals
= decode_line_1 (&s
, 1, (struct symtab
*)NULL
, 0, (char ***)NULL
);
2615 for (i
= 0; i
< sals
.nelts
; i
++)
2617 resolve_sal_pc (&sals
.sals
[i
]);
2618 if (b
->address
!= sals
.sals
[i
].pc
2619 || (b
->source_file
!= NULL
2620 && sals
.sals
[i
].symtab
!= NULL
2621 && (!STREQ (b
->source_file
, sals
.sals
[i
].symtab
->filename
)
2622 || b
->line_number
!= sals
.sals
[i
].line
)
2625 if (b
->source_file
!= NULL
)
2626 free (b
->source_file
);
2627 if (sals
.sals
[i
].symtab
== NULL
)
2628 b
->source_file
= NULL
;
2631 savestring (sals
.sals
[i
].symtab
->filename
,
2632 strlen (sals
.sals
[i
].symtab
->filename
));
2633 b
->line_number
= sals
.sals
[i
].line
;
2634 b
->address
= sals
.sals
[i
].pc
;
2636 if (b
->cond_string
!= NULL
)
2640 free ((PTR
)b
->cond
);
2641 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
2644 check_duplicates (b
->address
);
2648 b
->enable
= save_enable
; /* Restore it, this worked. */
2650 free ((PTR
)sals
.sals
);
2654 innermost_block
= NULL
;
2655 /* The issue arises of what context to evaluate this in. The same
2656 one as when it was set, but what does that mean when symbols have
2657 been re-read? We could save the filename and functionname, but
2658 if the context is more local than that, the best we could do would
2659 be something like how many levels deep and which index at that
2660 particular level, but that's going to be less stable than filenames
2661 or functionnames. */
2662 /* So for now, just use a global context. */
2663 b
->exp
= parse_expression (b
->exp_string
);
2664 b
->exp_valid_block
= innermost_block
;
2665 b
->val
= evaluate_expression (b
->exp
);
2666 release_value (b
->val
);
2667 if (VALUE_LAZY (b
->val
))
2668 value_fetch_lazy (b
->val
);
2670 if (b
->cond_string
!= NULL
)
2673 b
->cond
= parse_exp_1 (&s
, (struct block
*)0, 0);
2675 if (b
->enable
== enabled
)
2680 printf_filtered ("Deleting unknown breakpoint type %d\n", b
->type
);
2685 case bp_longjmp_resume
:
2686 delete_breakpoint (b
);
2693 /* Re-set all breakpoints after symbols have been re-loaded. */
2695 breakpoint_re_set ()
2697 struct breakpoint
*b
, *temp
;
2698 static char message1
[] = "Error in re-setting breakpoint %d:\n";
2699 char message
[sizeof (message1
) + 30 /* slop */];
2701 ALL_BREAKPOINTS_SAFE (b
, temp
)
2703 sprintf (message
, message1
, b
->number
); /* Format possible error msg */
2704 catch_errors (breakpoint_re_set_one
, (char *) b
, message
,
2708 create_longjmp_breakpoint("longjmp");
2709 create_longjmp_breakpoint("_longjmp");
2710 create_longjmp_breakpoint("siglongjmp");
2711 create_longjmp_breakpoint(NULL
);
2714 /* Took this out (temporaliy at least), since it produces an extra
2715 blank line at startup. This messes up the gdbtests. -PB */
2716 /* Blank line to finish off all those mention() messages we just printed. */
2717 printf_filtered ("\n");
2721 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
2722 If from_tty is nonzero, it prints a message to that effect,
2723 which ends with a period (no newline). */
2726 set_ignore_count (bptnum
, count
, from_tty
)
2727 int bptnum
, count
, from_tty
;
2729 register struct breakpoint
*b
;
2735 if (b
->number
== bptnum
)
2737 b
->ignore_count
= count
;
2740 else if (count
== 0)
2741 printf_filtered ("Will stop next time breakpoint %d is reached.",
2743 else if (count
== 1)
2744 printf_filtered ("Will ignore next crossing of breakpoint %d.",
2747 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
2752 error ("No breakpoint number %d.", bptnum
);
2755 /* Clear the ignore counts of all breakpoints. */
2757 breakpoint_clear_ignore_counts ()
2759 struct breakpoint
*b
;
2762 b
->ignore_count
= 0;
2765 /* Command to set ignore-count of breakpoint N to COUNT. */
2768 ignore_command (args
, from_tty
)
2776 error_no_arg ("a breakpoint number");
2778 num
= get_number (&p
);
2781 error ("Second argument (specified ignore-count) is missing.");
2783 set_ignore_count (num
,
2784 longest_to_int (value_as_long (parse_and_eval (p
))),
2786 printf_filtered ("\n");
2789 /* Call FUNCTION on each of the breakpoints
2790 whose numbers are given in ARGS. */
2793 map_breakpoint_numbers (args
, function
)
2795 void (*function
) PARAMS ((struct breakpoint
*));
2797 register char *p
= args
;
2800 register struct breakpoint
*b
;
2803 error_no_arg ("one or more breakpoint numbers");
2809 num
= get_number (&p1
);
2812 if (b
->number
== num
)
2817 printf ("No breakpoint number %d.\n", num
);
2824 enable_breakpoint (bpt
)
2825 struct breakpoint
*bpt
;
2827 FRAME save_selected_frame
;
2828 int save_selected_frame_level
= -1;
2830 bpt
->enable
= enabled
;
2832 if (xgdb_verbose
&& bpt
->type
== bp_breakpoint
)
2833 printf ("breakpoint #%d enabled\n", bpt
->number
);
2835 check_duplicates (bpt
->address
);
2836 if (bpt
->type
== bp_watchpoint
)
2838 if (bpt
->exp_valid_block
!= NULL
)
2840 FRAME fr
= within_scope (bpt
->exp_valid_block
);
2844 Cannot enable watchpoint %d because the block in which its expression\n\
2845 is valid is not currently in scope.\n", bpt
->number
);
2846 bpt
->enable
= disabled
;
2849 save_selected_frame
= selected_frame
;
2850 save_selected_frame_level
= selected_frame_level
;
2851 select_frame (fr
, -1);
2854 value_free (bpt
->val
);
2856 bpt
->val
= evaluate_expression (bpt
->exp
);
2857 release_value (bpt
->val
);
2858 if (VALUE_LAZY (bpt
->val
))
2859 value_fetch_lazy (bpt
->val
);
2861 if (save_selected_frame_level
>= 0)
2862 select_frame (save_selected_frame
, save_selected_frame_level
);
2868 enable_command (args
, from_tty
)
2872 struct breakpoint
*bpt
;
2874 ALL_BREAKPOINTS (bpt
)
2879 enable_breakpoint (bpt
);
2884 map_breakpoint_numbers (args
, enable_breakpoint
);
2888 disable_breakpoint (bpt
)
2889 struct breakpoint
*bpt
;
2891 bpt
->enable
= disabled
;
2893 if (xgdb_verbose
&& bpt
->type
== bp_breakpoint
)
2894 printf_filtered ("breakpoint #%d disabled\n", bpt
->number
);
2896 check_duplicates (bpt
->address
);
2901 disable_command (args
, from_tty
)
2905 register struct breakpoint
*bpt
;
2907 ALL_BREAKPOINTS (bpt
)
2912 disable_breakpoint (bpt
);
2917 map_breakpoint_numbers (args
, disable_breakpoint
);
2921 enable_once_breakpoint (bpt
)
2922 struct breakpoint
*bpt
;
2924 bpt
->enable
= enabled
;
2925 bpt
->disposition
= disable
;
2927 check_duplicates (bpt
->address
);
2932 enable_once_command (args
, from_tty
)
2936 map_breakpoint_numbers (args
, enable_once_breakpoint
);
2940 enable_delete_breakpoint (bpt
)
2941 struct breakpoint
*bpt
;
2943 bpt
->enable
= enabled
;
2944 bpt
->disposition
= delete;
2946 check_duplicates (bpt
->address
);
2951 enable_delete_command (args
, from_tty
)
2955 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
2959 * Use default_breakpoint_'s, or nothing if they aren't valid.
2961 struct symtabs_and_lines
2962 decode_line_spec_1 (string
, funfirstline
)
2966 struct symtabs_and_lines sals
;
2968 error ("Empty line specification.");
2969 if (default_breakpoint_valid
)
2970 sals
= decode_line_1 (&string
, funfirstline
,
2971 default_breakpoint_symtab
, default_breakpoint_line
,
2974 sals
= decode_line_1 (&string
, funfirstline
,
2975 (struct symtab
*)NULL
, 0, (char ***)NULL
);
2977 error ("Junk at end of line specification: %s", string
);
2982 _initialize_breakpoint ()
2984 breakpoint_chain
= 0;
2985 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
2986 before a breakpoint is set. */
2987 breakpoint_count
= 0;
2989 add_com ("ignore", class_breakpoint
, ignore_command
,
2990 "Set ignore-count of breakpoint number N to COUNT.");
2992 add_com ("commands", class_breakpoint
, commands_command
,
2993 "Set commands to be executed when a breakpoint is hit.\n\
2994 Give breakpoint number as argument after \"commands\".\n\
2995 With no argument, the targeted breakpoint is the last one set.\n\
2996 The commands themselves follow starting on the next line.\n\
2997 Type a line containing \"end\" to indicate the end of them.\n\
2998 Give \"silent\" as the first line to make the breakpoint silent;\n\
2999 then no output is printed when it is hit, except what the commands print.");
3001 add_com ("condition", class_breakpoint
, condition_command
,
3002 "Specify breakpoint number N to break only if COND is true.\n\
3003 N is an integer; COND is an expression to be evaluated whenever\n\
3004 breakpoint N is reached. ");
3006 add_com ("tbreak", class_breakpoint
, tbreak_command
,
3007 "Set a temporary breakpoint. Args like \"break\" command.\n\
3008 Like \"break\" except the breakpoint is only enabled temporarily,\n\
3009 so it will be disabled when hit. Equivalent to \"break\" followed\n\
3010 by using \"enable once\" on the breakpoint number.");
3012 add_prefix_cmd ("enable", class_breakpoint
, enable_command
,
3013 "Enable some breakpoints.\n\
3014 Give breakpoint numbers (separated by spaces) as arguments.\n\
3015 With no subcommand, breakpoints are enabled until you command otherwise.\n\
3016 This is used to cancel the effect of the \"disable\" command.\n\
3017 With a subcommand you can enable temporarily.",
3018 &enablelist
, "enable ", 1, &cmdlist
);
3020 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
,
3021 "Enable some breakpoints.\n\
3022 Give breakpoint numbers (separated by spaces) as arguments.\n\
3023 This is used to cancel the effect of the \"disable\" command.\n\
3024 May be abbreviated to simply \"enable\".\n",
3025 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
3027 add_cmd ("once", no_class
, enable_once_command
,
3028 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
3029 If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\
3030 See the \"tbreak\" command which sets a breakpoint and enables it once.",
3033 add_cmd ("delete", no_class
, enable_delete_command
,
3034 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
3035 If a breakpoint is hit while enabled in this fashion, it is deleted.",
3038 add_cmd ("delete", no_class
, enable_delete_command
,
3039 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
3040 If a breakpoint is hit while enabled in this fashion, it is deleted.",
3043 add_cmd ("once", no_class
, enable_once_command
,
3044 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
3045 If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\
3046 See the \"tbreak\" command which sets a breakpoint and enables it once.",
3049 add_prefix_cmd ("disable", class_breakpoint
, disable_command
,
3050 "Disable some breakpoints.\n\
3051 Arguments are breakpoint numbers with spaces in between.\n\
3052 To disable all breakpoints, give no argument.\n\
3053 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
3054 &disablelist
, "disable ", 1, &cmdlist
);
3055 add_com_alias ("dis", "disable", class_breakpoint
, 1);
3056 add_com_alias ("disa", "disable", class_breakpoint
, 1);
3058 add_cmd ("breakpoints", class_alias
, disable_command
,
3059 "Disable some breakpoints.\n\
3060 Arguments are breakpoint numbers with spaces in between.\n\
3061 To disable all breakpoints, give no argument.\n\
3062 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
3063 This command may be abbreviated \"disable\".",
3066 add_prefix_cmd ("delete", class_breakpoint
, delete_command
,
3067 "Delete some breakpoints or auto-display expressions.\n\
3068 Arguments are breakpoint numbers with spaces in between.\n\
3069 To delete all breakpoints, give no argument.\n\
3071 Also a prefix command for deletion of other GDB objects.\n\
3072 The \"unset\" command is also an alias for \"delete\".",
3073 &deletelist
, "delete ", 1, &cmdlist
);
3074 add_com_alias ("d", "delete", class_breakpoint
, 1);
3076 add_cmd ("breakpoints", class_alias
, delete_command
,
3077 "Delete some breakpoints or auto-display expressions.\n\
3078 Arguments are breakpoint numbers with spaces in between.\n\
3079 To delete all breakpoints, give no argument.\n\
3080 This command may be abbreviated \"delete\".",
3083 add_com ("clear", class_breakpoint
, clear_command
,
3084 "Clear breakpoint at specified line or function.\n\
3085 Argument may be line number, function name, or \"*\" and an address.\n\
3086 If line number is specified, all breakpoints in that line are cleared.\n\
3087 If function is specified, breakpoints at beginning of function are cleared.\n\
3088 If an address is specified, breakpoints at that address are cleared.\n\n\
3089 With no argument, clears all breakpoints in the line that the selected frame\n\
3092 See also the \"delete\" command which clears breakpoints by number.");
3094 add_com ("break", class_breakpoint
, break_command
,
3095 "Set breakpoint at specified line or function.\n\
3096 Argument may be line number, function name, or \"*\" and an address.\n\
3097 If line number is specified, break at start of code for that line.\n\
3098 If function is specified, break at start of code for that function.\n\
3099 If an address is specified, break at that exact address.\n\
3100 With no arg, uses current execution address of selected stack frame.\n\
3101 This is useful for breaking on return to a stack frame.\n\
3103 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
3105 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
3106 add_com_alias ("b", "break", class_run
, 1);
3107 add_com_alias ("br", "break", class_run
, 1);
3108 add_com_alias ("bre", "break", class_run
, 1);
3109 add_com_alias ("brea", "break", class_run
, 1);
3111 add_info ("breakpoints", breakpoints_info
,
3112 "Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
3113 The \"Type\" column indicates one of:\n\
3114 \tbreakpoint - normal breakpoint\n\
3115 \twatchpoint - watchpoint\n\
3116 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
3117 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
3118 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
3119 address and file/line number respectively.\n\n\
3120 Convenience variable \"$_\" and default examine address for \"x\"\n\
3121 are set to the address of the last breakpoint listed.\n\n\
3122 Convenience variable \"$bpnum\" contains the number of the last\n\
3125 #if MAINTENANCE_CMDS
3127 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
,
3128 "Status of all breakpoints, or breakpoint number NUMBER.\n\
3129 The \"Type\" column indicates one of:\n\
3130 \tbreakpoint - normal breakpoint\n\
3131 \twatchpoint - watchpoint\n\
3132 \tlongjmp - internal breakpoint used to step through longjmp()\n\
3133 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
3134 \tuntil - internal breakpoint used by the \"until\" command\n\
3135 \tfinish - internal breakpoint used by the \"finish\" command\n\
3136 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
3137 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
3138 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
3139 address and file/line number respectively.\n\n\
3140 Convenience variable \"$_\" and default examine address for \"x\"\n\
3141 are set to the address of the last breakpoint listed.\n\n\
3142 Convenience variable \"$bpnum\" contains the number of the last\n\
3144 &maintenanceinfolist
);
3146 #endif /* MAINTENANCE_CMDS */
3148 add_com ("catch", class_breakpoint
, catch_command
,
3149 "Set breakpoints to catch exceptions that are raised.\n\
3150 Argument may be a single exception to catch, multiple exceptions\n\
3151 to catch, or the default exception \"default\". If no arguments\n\
3152 are given, breakpoints are set at all exception handlers catch clauses\n\
3153 within the current scope.\n\
3155 A condition specified for the catch applies to all breakpoints set\n\
3156 with this command\n\
3158 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
3160 add_com ("watch", class_breakpoint
, watch_command
,
3161 "Set a watchpoint for an expression.\n\
3162 A watchpoint stops execution of your program whenever the value of\n\
3163 an expression changes.");
3165 add_info ("watchpoints", breakpoints_info
,
3166 "Synonym for ``info breakpoints''.");
3169 /* OK, when we call objfile_relocate, we need to relocate breakpoints
3170 too. breakpoint_re_set is not a good choice--for example, if
3171 addr_string contains just a line number without a file name the
3172 breakpoint might get set in a different file. In general, there is
3173 no need to go all the way back to the user's string (though this might
3174 work if some effort were made to canonicalize it), since symtabs and
3175 everything except addresses are still valid.
3177 Probably the best way to solve this is to have each breakpoint save
3178 the objfile and the section number that was used to set it (if set
3179 by "*addr", probably it is best to use find_pc_line to get a symtab
3180 and use the objfile and block_line_section for that symtab). Then
3181 objfile_relocate can call fixup_breakpoints with the objfile and
3182 the new_offsets, and it can relocate only the appropriate breakpoints. */
3184 #ifdef IBM6000_TARGET
3185 /* But for now, just kludge it based on the concept that before an
3186 objfile is relocated the breakpoint is below 0x10000000, and afterwards
3187 it is higher, so that way we only relocate each breakpoint once. */
3190 fixup_breakpoints (low
, high
, delta
)
3195 struct breakpoint
*b
;
3199 if (b
->address
>= low
&& b
->address
<= high
)
3200 b
->address
+= delta
;