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. */
573 bpstat retval
= NULL
;
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
)
1103 int value_is_zero
= 0;
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 #else /* No SHIFT_INST_REGS. */
1158 #endif /* No SHIFT_INST_REGS. */
1161 #endif /* DECR_PC_AFTER_BREAK != 0. */
1165 /* Tell what to do about this bpstat. */
1170 /* Classify each bpstat as one of the following. */
1172 /* This bpstat element has no effect on the main_action. */
1175 /* There was a watchpoint, stop but don't print. */
1178 /* There was a watchpoint, stop and print. */
1181 /* There was a breakpoint but we're not stopping. */
1184 /* There was a breakpoint, stop but don't print. */
1187 /* There was a breakpoint, stop and print. */
1190 /* We hit the longjmp breakpoint. */
1193 /* We hit the longjmp_resume breakpoint. */
1196 /* This is just used to count how many enums there are. */
1200 /* Here is the table which drives this routine. So that we can
1201 format it pretty, we define some abbreviations for the
1202 enum bpstat_what codes. */
1203 #define keep_c BPSTAT_WHAT_KEEP_CHECKING
1204 #define stop_s BPSTAT_WHAT_STOP_SILENT
1205 #define stop_n BPSTAT_WHAT_STOP_NOISY
1206 #define single BPSTAT_WHAT_SINGLE
1207 #define setlr BPSTAT_WHAT_SET_LONGJMP_RESUME
1208 #define clrlr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
1209 #define clrlrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
1210 /* "Can't happen." Might want to print an error message.
1211 abort() is not out of the question, but chances are GDB is just
1212 a bit confused, not unusable. */
1213 #define err BPSTAT_WHAT_STOP_NOISY
1215 /* Given an old action and a class, come up with a new action. */
1216 /* One interesting property of this table is that wp_silent is the same
1217 as bp_silent and wp_noisy is the same as bp_noisy. That is because
1218 after stopping, the check for whether to step over a breakpoint
1219 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
1220 reference to how we stopped. We retain separate wp_silent and bp_silent
1221 codes in case we want to change that someday. */
1222 static const enum bpstat_what_main_action
1223 table
[(int)class_last
][(int)BPSTAT_WHAT_LAST
] =
1226 /* keep_c stop_s stop_n single setlr clrlr clrlrs */
1228 /*no_effect*/ {keep_c
, stop_s
, stop_n
, single
, setlr
, clrlr
, clrlrs
},
1229 /*wp_silent*/ {stop_s
, stop_s
, stop_n
, stop_s
, stop_s
, stop_s
, stop_s
},
1230 /*wp_noisy*/ {stop_n
, stop_n
, stop_n
, stop_n
, stop_n
, stop_n
, stop_n
},
1231 /*bp_nostop*/ {single
, stop_s
, stop_n
, single
, setlr
, clrlrs
, clrlrs
},
1232 /*bp_silent*/ {stop_s
, stop_s
, stop_n
, stop_s
, stop_s
, stop_s
, stop_s
},
1233 /*bp_noisy*/ {stop_n
, stop_n
, stop_n
, stop_n
, stop_n
, stop_n
, stop_n
},
1234 /*long_jump*/ {setlr
, stop_s
, stop_n
, setlr
, err
, err
, err
},
1235 /*long_resume*/ {clrlr
, stop_s
, stop_n
, clrlrs
, err
, err
, err
}
1245 enum bpstat_what_main_action current_action
= BPSTAT_WHAT_KEEP_CHECKING
;
1246 struct bpstat_what retval
;
1248 for (; bs
!= NULL
; bs
= bs
->next
)
1250 enum class bs_class
= no_effect
;
1251 if (bs
->breakpoint_at
== NULL
)
1252 /* I suspect this can happen if it was a momentary breakpoint
1253 which has since been deleted. */
1255 switch (bs
->breakpoint_at
->type
)
1263 bs_class
= bp_noisy
;
1265 bs_class
= bp_silent
;
1268 bs_class
= bp_nostop
;
1274 bs_class
= wp_noisy
;
1276 bs_class
= wp_silent
;
1279 /* There was a watchpoint, but we're not stopping. This requires
1280 no further action. */
1281 bs_class
= no_effect
;
1284 bs_class
= long_jump
;
1286 case bp_longjmp_resume
:
1287 bs_class
= long_resume
;
1289 case bp_step_resume
:
1291 /* Need to temporarily disable this until we can fix the bug
1292 with nexting over a breakpoint with ->stop clear causing
1293 an infinite loop. For now, treat the breakpoint as having
1294 been hit even if the frame is wrong. */
1298 retval
.step_resume
= 1;
1299 /* We don't handle this via the main_action. */
1300 bs_class
= no_effect
;
1304 /* It is for the wrong frame. */
1305 bs_class
= bp_nostop
;
1309 /* Make sure the action is stop (silent or noisy), so infrun.c
1310 pops the dummy frame. */
1311 bs_class
= bp_silent
;
1312 retval
.call_dummy
= 1;
1315 current_action
= table
[(int)bs_class
][(int)current_action
];
1317 retval
.main_action
= current_action
;
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", "step resume",
1352 static char *bpdisps
[] = {"del", "dis", "keep"};
1353 static char bpenables
[] = "ny";
1354 char wrap_indent
[80];
1358 || bnum
== b
->number
)
1360 /* We only print out user settable breakpoints unless the allflag is set. */
1362 && b
->type
!= bp_breakpoint
1363 && b
->type
!= bp_watchpoint
)
1366 if (!found_a_breakpoint
++)
1367 printf_filtered ("Num Type Disp Enb %sWhat\n",
1368 addressprint
? "Address " : "");
1370 printf_filtered ("%-3d %-14s %-4s %-3c ",
1372 bptypes
[(int)b
->type
],
1373 bpdisps
[(int)b
->disposition
],
1374 bpenables
[(int)b
->enable
]);
1375 strcpy (wrap_indent
, " ");
1377 strcat (wrap_indent
, " ");
1381 print_expression (b
->exp
, stdout
);
1388 case bp_longjmp_resume
:
1389 case bp_step_resume
:
1392 printf_filtered ("%s ", local_hex_string_custom(b
->address
, "08"));
1394 last_addr
= b
->address
;
1397 sym
= find_pc_function (b
->address
);
1400 fputs_filtered ("in ", stdout
);
1401 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stdout
);
1402 wrap_here (wrap_indent
);
1403 fputs_filtered (" at ", stdout
);
1405 fputs_filtered (b
->source_file
, stdout
);
1406 printf_filtered (":%d", b
->line_number
);
1409 print_address_symbolic (b
->address
, stdout
, demangle
, " ");
1413 printf_filtered ("\n");
1416 printf_filtered ("\tstop only in stack frame at %s\n",
1417 local_hex_string(b
->frame
));
1420 printf_filtered ("\tstop only if ");
1421 print_expression (b
->cond
, stdout
);
1422 printf_filtered ("\n");
1424 if (b
->ignore_count
)
1425 printf_filtered ("\tignore next %d hits\n", b
->ignore_count
);
1426 if ((l
= b
->commands
))
1429 fputs_filtered ("\t", stdout
);
1430 fputs_filtered (l
->line
, stdout
);
1431 fputs_filtered ("\n", stdout
);
1436 if (!found_a_breakpoint
)
1439 printf_filtered ("No breakpoints or watchpoints.\n");
1441 printf_filtered ("No breakpoint or watchpoint number %d.\n", bnum
);
1444 /* Compare against (CORE_ADDR)-1 in case some compiler decides
1445 that a comparison of an unsigned with -1 is always false. */
1446 if (last_addr
!= (CORE_ADDR
)-1)
1447 set_next_address (last_addr
);
1452 breakpoints_info (bnum_exp
, from_tty
)
1459 bnum
= parse_and_eval_address (bnum_exp
);
1461 breakpoint_1 (bnum
, 0);
1464 #if MAINTENANCE_CMDS
1468 maintenance_info_breakpoints (bnum_exp
, from_tty
)
1475 bnum
= parse_and_eval_address (bnum_exp
);
1477 breakpoint_1 (bnum
, 1);
1482 /* Print a message describing any breakpoints set at PC. */
1485 describe_other_breakpoints (pc
)
1486 register CORE_ADDR pc
;
1488 register int others
= 0;
1489 register struct breakpoint
*b
;
1492 if (b
->address
== pc
)
1496 printf ("Note: breakpoint%s ", (others
> 1) ? "s" : "");
1498 if (b
->address
== pc
)
1503 (b
->enable
== disabled
) ? " (disabled)" : "",
1504 (others
> 1) ? "," : ((others
== 1) ? " and" : ""));
1506 printf ("also set at pc %s.\n", local_hex_string(pc
));
1510 /* Set the default place to put a breakpoint
1511 for the `break' command with no arguments. */
1514 set_default_breakpoint (valid
, addr
, symtab
, line
)
1517 struct symtab
*symtab
;
1520 default_breakpoint_valid
= valid
;
1521 default_breakpoint_address
= addr
;
1522 default_breakpoint_symtab
= symtab
;
1523 default_breakpoint_line
= line
;
1526 /* Rescan breakpoints at address ADDRESS,
1527 marking the first one as "first" and any others as "duplicates".
1528 This is so that the bpt instruction is only inserted once. */
1531 check_duplicates (address
)
1534 register struct breakpoint
*b
;
1535 register int count
= 0;
1537 if (address
== 0) /* Watchpoints are uninteresting */
1541 if (b
->enable
!= disabled
&& b
->address
== address
)
1544 b
->duplicate
= count
> 1;
1548 /* Low level routine to set a breakpoint.
1549 Takes as args the three things that every breakpoint must have.
1550 Returns the breakpoint object so caller can set other things.
1551 Does not set the breakpoint number!
1552 Does not print anything.
1554 ==> This routine should not be called if there is a chance of later
1555 error(); otherwise it leaves a bogus breakpoint on the chain. Validate
1556 your arguments BEFORE calling this routine! */
1558 static struct breakpoint
*
1559 set_raw_breakpoint (sal
)
1560 struct symtab_and_line sal
;
1562 register struct breakpoint
*b
, *b1
;
1564 b
= (struct breakpoint
*) xmalloc (sizeof (struct breakpoint
));
1565 memset (b
, 0, sizeof (*b
));
1566 b
->address
= sal
.pc
;
1567 if (sal
.symtab
== NULL
)
1568 b
->source_file
= NULL
;
1570 b
->source_file
= savestring (sal
.symtab
->filename
,
1571 strlen (sal
.symtab
->filename
));
1572 b
->line_number
= sal
.line
;
1573 b
->enable
= enabled
;
1576 b
->ignore_count
= 0;
1580 /* Add this breakpoint to the end of the chain
1581 so that a list of breakpoints will come out in order
1582 of increasing numbers. */
1584 b1
= breakpoint_chain
;
1586 breakpoint_chain
= b
;
1594 check_duplicates (sal
.pc
);
1600 create_longjmp_breakpoint(func_name
)
1603 struct symtab_and_line sal
;
1604 struct breakpoint
*b
;
1605 static int internal_breakpoint_number
= -1;
1607 if (func_name
!= NULL
)
1609 struct minimal_symbol
*m
;
1611 m
= lookup_minimal_symbol(func_name
, (struct objfile
*)NULL
);
1613 sal
.pc
= SYMBOL_VALUE_ADDRESS (m
);
1623 b
= set_raw_breakpoint(sal
);
1626 b
->type
= func_name
!= NULL
? bp_longjmp
: bp_longjmp_resume
;
1627 b
->disposition
= donttouch
;
1628 b
->enable
= disabled
;
1631 b
->addr_string
= strsave(func_name
);
1632 b
->number
= internal_breakpoint_number
--;
1635 /* Call this routine when stepping and nexting to enable a breakpoint if we do
1636 a longjmp(). When we hit that breakpoint, call
1637 set_longjmp_resume_breakpoint() to figure out where we are going. */
1640 enable_longjmp_breakpoint()
1642 register struct breakpoint
*b
;
1645 if (b
->type
== bp_longjmp
)
1647 b
->enable
= enabled
;
1648 check_duplicates (b
->address
);
1653 disable_longjmp_breakpoint()
1655 register struct breakpoint
*b
;
1658 if ( b
->type
== bp_longjmp
1659 || b
->type
== bp_longjmp_resume
)
1661 b
->enable
= disabled
;
1662 check_duplicates (b
->address
);
1666 /* Call this after hitting the longjmp() breakpoint. Use this to set a new
1667 breakpoint at the target of the jmp_buf.
1669 FIXME - This ought to be done by setting a temporary breakpoint that gets
1670 deleted automatically...
1674 set_longjmp_resume_breakpoint(pc
, frame
)
1678 register struct breakpoint
*b
;
1681 if (b
->type
== bp_longjmp_resume
)
1684 b
->enable
= enabled
;
1686 b
->frame
= FRAME_FP(frame
);
1689 check_duplicates (b
->address
);
1694 /* Set a breakpoint that will evaporate an end of command
1695 at address specified by SAL.
1696 Restrict it to frame FRAME if FRAME is nonzero. */
1699 set_momentary_breakpoint (sal
, frame
, type
)
1700 struct symtab_and_line sal
;
1704 register struct breakpoint
*b
;
1705 b
= set_raw_breakpoint (sal
);
1707 b
->enable
= enabled
;
1708 b
->disposition
= donttouch
;
1709 b
->frame
= (frame
? FRAME_FP (frame
) : 0);
1715 clear_momentary_breakpoints ()
1717 register struct breakpoint
*b
;
1719 if (b
->disposition
== delete)
1721 delete_breakpoint (b
);
1727 /* Tell the user we have just set a breakpoint B. */
1730 struct breakpoint
*b
;
1735 printf_filtered ("Watchpoint %d: ", b
->number
);
1736 print_expression (b
->exp
, stdout
);
1739 printf_filtered ("Breakpoint %d at %s", b
->number
,
1740 local_hex_string(b
->address
));
1742 printf_filtered (": file %s, line %d.",
1743 b
->source_file
, b
->line_number
);
1748 case bp_longjmp_resume
:
1749 case bp_step_resume
:
1752 printf_filtered ("\n");
1756 /* Nobody calls this currently. */
1757 /* Set a breakpoint from a symtab and line.
1758 If TEMPFLAG is nonzero, it is a temporary breakpoint.
1759 ADDR_STRING is a malloc'd string holding the name of where we are
1760 setting the breakpoint. This is used later to re-set it after the
1761 program is relinked and symbols are reloaded.
1762 Print the same confirmation messages that the breakpoint command prints. */
1765 set_breakpoint (s
, line
, tempflag
, addr_string
)
1771 register struct breakpoint
*b
;
1772 struct symtab_and_line sal
;
1777 resolve_sal_pc (&sal
); /* Might error out */
1778 describe_other_breakpoints (sal
.pc
);
1780 b
= set_raw_breakpoint (sal
);
1781 set_breakpoint_count (breakpoint_count
+ 1);
1782 b
->number
= breakpoint_count
;
1783 b
->type
= bp_breakpoint
;
1785 b
->addr_string
= addr_string
;
1786 b
->enable
= enabled
;
1787 b
->disposition
= tempflag
? delete : donttouch
;
1793 /* Set a breakpoint according to ARG (function, linenum or *address)
1794 and make it temporary if TEMPFLAG is nonzero. */
1797 break_command_1 (arg
, tempflag
, from_tty
)
1799 int tempflag
, from_tty
;
1801 struct symtabs_and_lines sals
;
1802 struct symtab_and_line sal
;
1803 register struct expression
*cond
= 0;
1804 register struct breakpoint
*b
;
1806 /* Pointers in arg to the start, and one past the end, of the condition. */
1807 char *cond_start
= NULL
;
1808 char *cond_end
= NULL
;
1809 /* Pointers in arg to the start, and one past the end,
1810 of the address part. */
1811 char *addr_start
= NULL
;
1812 char *addr_end
= NULL
;
1813 struct cleanup
*old_chain
;
1814 struct cleanup
*canonical_strings_chain
= NULL
;
1815 char **canonical
= (char **)NULL
;
1822 sal
.line
= sal
.pc
= sal
.end
= 0;
1825 /* If no arg given, or if first arg is 'if ', use the default breakpoint. */
1827 if (!arg
|| (arg
[0] == 'i' && arg
[1] == 'f'
1828 && (arg
[2] == ' ' || arg
[2] == '\t')))
1830 if (default_breakpoint_valid
)
1832 sals
.sals
= (struct symtab_and_line
*)
1833 xmalloc (sizeof (struct symtab_and_line
));
1834 sal
.pc
= default_breakpoint_address
;
1835 sal
.line
= default_breakpoint_line
;
1836 sal
.symtab
= default_breakpoint_symtab
;
1841 error ("No default breakpoint address now.");
1847 /* Force almost all breakpoints to be in terms of the
1848 current_source_symtab (which is decode_line_1's default). This
1849 should produce the results we want almost all of the time while
1850 leaving default_breakpoint_* alone. */
1851 if (default_breakpoint_valid
1852 && (!current_source_symtab
1853 || (arg
&& (*arg
== '+' || *arg
== '-'))))
1854 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
1855 default_breakpoint_line
, &canonical
);
1857 sals
= decode_line_1 (&arg
, 1, (struct symtab
*)NULL
, 0, &canonical
);
1865 /* Make sure that all storage allocated in decode_line_1 gets freed in case
1866 the following `for' loop errors out. */
1867 old_chain
= make_cleanup (free
, sals
.sals
);
1868 if (canonical
!= (char **)NULL
)
1870 make_cleanup (free
, canonical
);
1871 canonical_strings_chain
= make_cleanup (null_cleanup
, 0);
1872 for (i
= 0; i
< sals
.nelts
; i
++)
1874 if (canonical
[i
] != NULL
)
1875 make_cleanup (free
, canonical
[i
]);
1879 /* Resolve all line numbers to PC's, and verify that conditions
1880 can be parsed, before setting any breakpoints. */
1881 for (i
= 0; i
< sals
.nelts
; i
++)
1883 resolve_sal_pc (&sals
.sals
[i
]);
1887 if (arg
[0] == 'i' && arg
[1] == 'f'
1888 && (arg
[2] == ' ' || arg
[2] == '\t'))
1892 cond
= parse_exp_1 (&arg
, block_for_pc (sals
.sals
[i
].pc
), 0);
1896 error ("Junk at end of arguments.");
1900 /* Remove the canonical strings from the cleanup, they are needed below. */
1901 if (canonical
!= (char **)NULL
)
1902 discard_cleanups (canonical_strings_chain
);
1904 /* Now set all the breakpoints. */
1905 for (i
= 0; i
< sals
.nelts
; i
++)
1910 describe_other_breakpoints (sal
.pc
);
1912 b
= set_raw_breakpoint (sal
);
1913 set_breakpoint_count (breakpoint_count
+ 1);
1914 b
->number
= breakpoint_count
;
1915 b
->type
= bp_breakpoint
;
1918 /* If a canonical line spec is needed use that instead of the
1920 if (canonical
!= (char **)NULL
&& canonical
[i
] != NULL
)
1921 b
->addr_string
= canonical
[i
];
1922 else if (addr_start
)
1923 b
->addr_string
= savestring (addr_start
, addr_end
- addr_start
);
1925 b
->cond_string
= savestring (cond_start
, cond_end
- cond_start
);
1927 b
->enable
= enabled
;
1928 b
->disposition
= tempflag
? delete : donttouch
;
1935 printf ("Multiple breakpoints were set.\n");
1936 printf ("Use the \"delete\" command to delete unwanted breakpoints.\n");
1938 do_cleanups (old_chain
);
1941 /* Helper function for break_command_1 and disassemble_command. */
1944 resolve_sal_pc (sal
)
1945 struct symtab_and_line
*sal
;
1949 if (sal
->pc
== 0 && sal
->symtab
!= 0)
1951 pc
= find_line_pc (sal
->symtab
, sal
->line
);
1953 error ("No line %d in file \"%s\".",
1954 sal
->line
, sal
->symtab
->filename
);
1960 break_command (arg
, from_tty
)
1964 break_command_1 (arg
, 0, from_tty
);
1968 tbreak_command (arg
, from_tty
)
1972 break_command_1 (arg
, 1, from_tty
);
1977 watch_command (arg
, from_tty
)
1981 struct breakpoint
*b
;
1982 struct symtab_and_line sal
;
1983 struct expression
*exp
;
1984 struct block
*exp_valid_block
;
1991 /* Parse arguments. */
1992 innermost_block
= NULL
;
1993 exp
= parse_expression (arg
);
1994 exp_valid_block
= innermost_block
;
1995 val
= evaluate_expression (exp
);
1996 release_value (val
);
1997 if (VALUE_LAZY (val
))
1998 value_fetch_lazy (val
);
2000 /* Now set up the breakpoint. */
2001 b
= set_raw_breakpoint (sal
);
2002 set_breakpoint_count (breakpoint_count
+ 1);
2003 b
->number
= breakpoint_count
;
2004 b
->type
= bp_watchpoint
;
2005 b
->disposition
= donttouch
;
2007 b
->exp_valid_block
= exp_valid_block
;
2010 b
->cond_string
= NULL
;
2011 b
->exp_string
= savestring (arg
, strlen (arg
));
2016 * Helper routine for the until_command routine in infcmd.c. Here
2017 * because it uses the mechanisms of breakpoints.
2021 until_break_command (arg
, from_tty
)
2025 struct symtabs_and_lines sals
;
2026 struct symtab_and_line sal
;
2027 FRAME prev_frame
= get_prev_frame (selected_frame
);
2028 struct breakpoint
*breakpoint
;
2029 struct cleanup
*old_chain
;
2031 clear_proceed_status ();
2033 /* Set a breakpoint where the user wants it and at return from
2036 if (default_breakpoint_valid
)
2037 sals
= decode_line_1 (&arg
, 1, default_breakpoint_symtab
,
2038 default_breakpoint_line
, (char ***)NULL
);
2040 sals
= decode_line_1 (&arg
, 1, (struct symtab
*)NULL
, 0, (char ***)NULL
);
2042 if (sals
.nelts
!= 1)
2043 error ("Couldn't get information on specified line.");
2046 free ((PTR
)sals
.sals
); /* malloc'd, so freed */
2049 error ("Junk at end of arguments.");
2051 resolve_sal_pc (&sal
);
2053 breakpoint
= set_momentary_breakpoint (sal
, selected_frame
, bp_until
);
2055 old_chain
= make_cleanup(delete_breakpoint
, breakpoint
);
2057 /* Keep within the current frame */
2061 struct frame_info
*fi
;
2063 fi
= get_frame_info (prev_frame
);
2064 sal
= find_pc_line (fi
->pc
, 0);
2066 breakpoint
= set_momentary_breakpoint (sal
, prev_frame
, bp_until
);
2067 make_cleanup(delete_breakpoint
, breakpoint
);
2070 proceed (-1, -1, 0);
2071 do_cleanups(old_chain
);
2075 /* These aren't used; I don't konw what they were for. */
2076 /* Set a breakpoint at the catch clause for NAME. */
2078 catch_breakpoint (name
)
2084 disable_catch_breakpoint ()
2089 delete_catch_breakpoint ()
2094 enable_catch_breakpoint ()
2101 struct sal_chain
*next
;
2102 struct symtab_and_line sal
;
2106 /* This isn't used; I don't know what it was for. */
2107 /* For each catch clause identified in ARGS, run FUNCTION
2108 with that clause as an argument. */
2109 static struct symtabs_and_lines
2110 map_catch_names (args
, function
)
2114 register char *p
= args
;
2116 struct symtabs_and_lines sals
;
2118 struct sal_chain
*sal_chain
= 0;
2122 error_no_arg ("one or more catch names");
2130 /* Don't swallow conditional part. */
2131 if (p1
[0] == 'i' && p1
[1] == 'f'
2132 && (p1
[2] == ' ' || p1
[2] == '\t'))
2138 while (isalnum (*p1
) || *p1
== '_' || *p1
== '$')
2142 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
2143 error ("Arguments must be catch names.");
2149 struct sal_chain
*next
2150 = (struct sal_chain
*)alloca (sizeof (struct sal_chain
));
2151 next
->next
= sal_chain
;
2152 next
->sal
= get_catch_sal (p
);
2157 printf ("No catch clause for exception %s.\n", p
);
2162 while (*p
== ' ' || *p
== '\t') p
++;
2167 /* This shares a lot of code with `print_frame_label_vars' from stack.c. */
2169 static struct symtabs_and_lines
2170 get_catch_sals (this_level_only
)
2171 int this_level_only
;
2173 register struct blockvector
*bl
;
2174 register struct block
*block
;
2175 int index
, have_default
= 0;
2176 struct frame_info
*fi
;
2178 struct symtabs_and_lines sals
;
2179 struct sal_chain
*sal_chain
= 0;
2180 char *blocks_searched
;
2182 /* Not sure whether an error message is always the correct response,
2183 but it's better than a core dump. */
2184 if (selected_frame
== NULL
)
2185 error ("No selected frame.");
2186 block
= get_frame_block (selected_frame
);
2187 fi
= get_frame_info (selected_frame
);
2194 error ("No symbol table info available.\n");
2196 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
2197 blocks_searched
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
2198 memset (blocks_searched
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
2202 CORE_ADDR end
= BLOCK_END (block
) - 4;
2205 if (bl
!= blockvector_for_pc (end
, &index
))
2206 error ("blockvector blotch");
2207 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
2208 error ("blockvector botch");
2209 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
2212 /* Don't print out blocks that have gone by. */
2213 while (index
< last_index
2214 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
2217 while (index
< last_index
2218 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
2220 if (blocks_searched
[index
] == 0)
2222 struct block
*b
= BLOCKVECTOR_BLOCK (bl
, index
);
2225 register struct symbol
*sym
;
2227 nsyms
= BLOCK_NSYMS (b
);
2229 for (i
= 0; i
< nsyms
; i
++)
2231 sym
= BLOCK_SYM (b
, i
);
2232 if (STREQ (SYMBOL_NAME (sym
), "default"))
2238 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
2240 struct sal_chain
*next
= (struct sal_chain
*)
2241 alloca (sizeof (struct sal_chain
));
2242 next
->next
= sal_chain
;
2243 next
->sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
2247 blocks_searched
[index
] = 1;
2253 if (sal_chain
&& this_level_only
)
2256 /* After handling the function's top-level block, stop.
2257 Don't continue to its superblock, the block of
2258 per-file symbols. */
2259 if (BLOCK_FUNCTION (block
))
2261 block
= BLOCK_SUPERBLOCK (block
);
2266 struct sal_chain
*tmp_chain
;
2268 /* Count the number of entries. */
2269 for (index
= 0, tmp_chain
= sal_chain
; tmp_chain
;
2270 tmp_chain
= tmp_chain
->next
)
2274 sals
.sals
= (struct symtab_and_line
*)
2275 xmalloc (index
* sizeof (struct symtab_and_line
));
2276 for (index
= 0; sal_chain
; sal_chain
= sal_chain
->next
, index
++)
2277 sals
.sals
[index
] = sal_chain
->sal
;
2283 /* Commands to deal with catching exceptions. */
2286 catch_command_1 (arg
, tempflag
, from_tty
)
2291 /* First, translate ARG into something we can deal with in terms
2294 struct symtabs_and_lines sals
;
2295 struct symtab_and_line sal
;
2296 register struct expression
*cond
= 0;
2297 register struct breakpoint
*b
;
2301 sal
.line
= sal
.pc
= sal
.end
= 0;
2304 /* If no arg given, or if first arg is 'if ', all active catch clauses
2305 are breakpointed. */
2307 if (!arg
|| (arg
[0] == 'i' && arg
[1] == 'f'
2308 && (arg
[2] == ' ' || arg
[2] == '\t')))
2310 /* Grab all active catch clauses. */
2311 sals
= get_catch_sals (0);
2315 /* Grab selected catch clauses. */
2316 error ("catch NAME not implemented");
2318 /* This isn't used; I don't know what it was for. */
2319 sals
= map_catch_names (arg
, catch_breakpoint
);
2327 for (i
= 0; i
< sals
.nelts
; i
++)
2329 resolve_sal_pc (&sals
.sals
[i
]);
2333 if (arg
[0] == 'i' && arg
[1] == 'f'
2334 && (arg
[2] == ' ' || arg
[2] == '\t'))
2335 cond
= parse_exp_1 ((arg
+= 2, &arg
),
2336 block_for_pc (sals
.sals
[i
].pc
), 0);
2338 error ("Junk at end of arguments.");
2343 for (i
= 0; i
< sals
.nelts
; i
++)
2348 describe_other_breakpoints (sal
.pc
);
2350 b
= set_raw_breakpoint (sal
);
2351 set_breakpoint_count (breakpoint_count
+ 1);
2352 b
->number
= breakpoint_count
;
2353 b
->type
= bp_breakpoint
;
2355 b
->enable
= enabled
;
2356 b
->disposition
= tempflag
? delete : donttouch
;
2363 printf ("Multiple breakpoints were set.\n");
2364 printf ("Use the \"delete\" command to delete unwanted breakpoints.\n");
2366 free ((PTR
)sals
.sals
);
2370 /* These aren't used; I don't know what they were for. */
2371 /* Disable breakpoints on all catch clauses described in ARGS. */
2373 disable_catch (args
)
2376 /* Map the disable command to catch clauses described in ARGS. */
2379 /* Enable breakpoints on all catch clauses described in ARGS. */
2384 /* Map the disable command to catch clauses described in ARGS. */
2387 /* Delete breakpoints on all catch clauses in the active scope. */
2392 /* Map the delete command to catch clauses described in ARGS. */
2397 catch_command (arg
, from_tty
)
2401 catch_command_1 (arg
, 0, from_tty
);
2405 clear_command (arg
, from_tty
)
2409 register struct breakpoint
*b
, *b1
;
2410 struct symtabs_and_lines sals
;
2411 struct symtab_and_line sal
;
2412 register struct breakpoint
*found
;
2417 sals
= decode_line_spec (arg
, 1);
2421 sals
.sals
= (struct symtab_and_line
*) xmalloc (sizeof (struct symtab_and_line
));
2422 sal
.line
= default_breakpoint_line
;
2423 sal
.symtab
= default_breakpoint_symtab
;
2425 if (sal
.symtab
== 0)
2426 error ("No source file specified.");
2432 for (i
= 0; i
< sals
.nelts
; i
++)
2434 /* If exact pc given, clear bpts at that pc.
2435 But if sal.pc is zero, clear all bpts on specified line. */
2437 found
= (struct breakpoint
*) 0;
2438 while (breakpoint_chain
2440 ? breakpoint_chain
->address
== sal
.pc
2441 : (breakpoint_chain
->source_file
!= NULL
2442 && sal
.symtab
!= NULL
2443 && STREQ (breakpoint_chain
->source_file
,
2444 sal
.symtab
->filename
)
2445 && breakpoint_chain
->line_number
== sal
.line
)))
2447 b1
= breakpoint_chain
;
2448 breakpoint_chain
= b1
->next
;
2455 && b
->next
->type
!= bp_watchpoint
2457 ? b
->next
->address
== sal
.pc
2458 : (b
->next
->source_file
!= NULL
2459 && sal
.symtab
!= NULL
2460 && STREQ (b
->next
->source_file
, sal
.symtab
->filename
)
2461 && b
->next
->line_number
== sal
.line
)))
2472 error ("No breakpoint at %s.", arg
);
2474 error ("No breakpoint at this line.");
2477 if (found
->next
) from_tty
= 1; /* Always report if deleted more than one */
2478 if (from_tty
) printf ("Deleted breakpoint%s ", found
->next
? "s" : "");
2481 if (from_tty
) printf ("%d ", found
->number
);
2483 delete_breakpoint (found
);
2486 if (from_tty
) putchar ('\n');
2488 free ((PTR
)sals
.sals
);
2491 /* Delete breakpoint in BS if they are `delete' breakpoints.
2492 This is called after any breakpoint is hit, or after errors. */
2495 breakpoint_auto_delete (bs
)
2498 for (; bs
; bs
= bs
->next
)
2499 if (bs
->breakpoint_at
&& bs
->breakpoint_at
->disposition
== delete)
2500 delete_breakpoint (bs
->breakpoint_at
);
2503 /* Delete a breakpoint and clean up all traces of it in the data structures. */
2506 delete_breakpoint (bpt
)
2507 struct breakpoint
*bpt
;
2509 register struct breakpoint
*b
;
2513 target_remove_breakpoint(bpt
->address
, bpt
->shadow_contents
);
2515 if (breakpoint_chain
== bpt
)
2516 breakpoint_chain
= bpt
->next
;
2521 b
->next
= bpt
->next
;
2525 check_duplicates (bpt
->address
);
2526 /* If this breakpoint was inserted, and there is another breakpoint
2527 at the same address, we need to insert the other breakpoint. */
2531 if (b
->address
== bpt
->address
&& !b
->duplicate
)
2534 val
= target_insert_breakpoint (b
->address
, b
->shadow_contents
);
2537 fprintf (stderr
, "Cannot insert breakpoint %d:\n", b
->number
);
2538 memory_error (val
, b
->address
); /* which bombs us out */
2545 free_command_lines (&bpt
->commands
);
2548 if (bpt
->cond_string
!= NULL
)
2549 free (bpt
->cond_string
);
2550 if (bpt
->addr_string
!= NULL
)
2551 free (bpt
->addr_string
);
2552 if (bpt
->exp_string
!= NULL
)
2553 free (bpt
->exp_string
);
2554 if (bpt
->source_file
!= NULL
)
2555 free (bpt
->source_file
);
2557 if (xgdb_verbose
&& bpt
->type
== bp_breakpoint
)
2558 printf ("breakpoint #%d deleted\n", bpt
->number
);
2560 /* Be sure no bpstat's are pointing at it after it's been freed. */
2561 /* FIXME, how can we find all bpstat's? We just check stop_bpstat for now. */
2562 for (bs
= stop_bpstat
; bs
; bs
= bs
->next
)
2563 if (bs
->breakpoint_at
== bpt
)
2564 bs
->breakpoint_at
= NULL
;
2569 delete_command (arg
, from_tty
)
2576 /* Ask user only if there are some breakpoints to delete. */
2578 || (breakpoint_chain
&& query ("Delete all breakpoints? ", 0, 0)))
2580 /* No arg; clear all breakpoints. */
2581 while (breakpoint_chain
)
2582 delete_breakpoint (breakpoint_chain
);
2586 map_breakpoint_numbers (arg
, delete_breakpoint
);
2589 /* Reset a breakpoint given it's struct breakpoint * BINT.
2590 The value we return ends up being the return value from catch_errors.
2591 Unused in this case. */
2594 breakpoint_re_set_one (bint
)
2597 struct breakpoint
*b
= (struct breakpoint
*)bint
; /* get past catch_errs */
2599 struct symtabs_and_lines sals
;
2601 enum enable save_enable
;
2606 if (b
->addr_string
== NULL
)
2608 /* Anything without a string can't be re-set. */
2609 delete_breakpoint (b
);
2612 /* In case we have a problem, disable this breakpoint. We'll restore
2613 its status if we succeed. */
2614 save_enable
= b
->enable
;
2615 b
->enable
= disabled
;
2618 sals
= decode_line_1 (&s
, 1, (struct symtab
*)NULL
, 0, (char ***)NULL
);
2619 for (i
= 0; i
< sals
.nelts
; i
++)
2621 resolve_sal_pc (&sals
.sals
[i
]);
2623 /* Reparse conditions, they might contain references to the
2625 if (b
->cond_string
!= NULL
)
2629 free ((PTR
)b
->cond
);
2630 b
->cond
= parse_exp_1 (&s
, block_for_pc (sals
.sals
[i
].pc
), 0);
2633 /* We need to re-set the breakpoint if the address changes...*/
2634 if (b
->address
!= sals
.sals
[i
].pc
2635 /* ...or new and old breakpoints both have source files, and
2636 the source file name or the line number changes... */
2637 || (b
->source_file
!= NULL
2638 && sals
.sals
[i
].symtab
!= NULL
2639 && (!STREQ (b
->source_file
, sals
.sals
[i
].symtab
->filename
)
2640 || b
->line_number
!= sals
.sals
[i
].line
)
2642 /* ...or we switch between having a source file and not having
2644 || ((b
->source_file
== NULL
) != (sals
.sals
[i
].symtab
== NULL
))
2647 if (b
->source_file
!= NULL
)
2648 free (b
->source_file
);
2649 if (sals
.sals
[i
].symtab
== NULL
)
2650 b
->source_file
= NULL
;
2653 savestring (sals
.sals
[i
].symtab
->filename
,
2654 strlen (sals
.sals
[i
].symtab
->filename
));
2655 b
->line_number
= sals
.sals
[i
].line
;
2656 b
->address
= sals
.sals
[i
].pc
;
2658 check_duplicates (b
->address
);
2662 b
->enable
= save_enable
; /* Restore it, this worked. */
2664 free ((PTR
)sals
.sals
);
2668 innermost_block
= NULL
;
2669 /* The issue arises of what context to evaluate this in. The same
2670 one as when it was set, but what does that mean when symbols have
2671 been re-read? We could save the filename and functionname, but
2672 if the context is more local than that, the best we could do would
2673 be something like how many levels deep and which index at that
2674 particular level, but that's going to be less stable than filenames
2675 or functionnames. */
2676 /* So for now, just use a global context. */
2677 b
->exp
= parse_expression (b
->exp_string
);
2678 b
->exp_valid_block
= innermost_block
;
2679 b
->val
= evaluate_expression (b
->exp
);
2680 release_value (b
->val
);
2681 if (VALUE_LAZY (b
->val
))
2682 value_fetch_lazy (b
->val
);
2684 if (b
->cond_string
!= NULL
)
2687 b
->cond
= parse_exp_1 (&s
, (struct block
*)0, 0);
2689 if (b
->enable
== enabled
)
2694 printf_filtered ("Deleting unknown breakpoint type %d\n", b
->type
);
2699 case bp_longjmp_resume
:
2700 delete_breakpoint (b
);
2707 /* Re-set all breakpoints after symbols have been re-loaded. */
2709 breakpoint_re_set ()
2711 struct breakpoint
*b
, *temp
;
2712 static char message1
[] = "Error in re-setting breakpoint %d:\n";
2713 char message
[sizeof (message1
) + 30 /* slop */];
2715 ALL_BREAKPOINTS_SAFE (b
, temp
)
2717 sprintf (message
, message1
, b
->number
); /* Format possible error msg */
2718 catch_errors (breakpoint_re_set_one
, (char *) b
, message
,
2722 create_longjmp_breakpoint("longjmp");
2723 create_longjmp_breakpoint("_longjmp");
2724 create_longjmp_breakpoint("siglongjmp");
2725 create_longjmp_breakpoint(NULL
);
2728 /* Took this out (temporaliy at least), since it produces an extra
2729 blank line at startup. This messes up the gdbtests. -PB */
2730 /* Blank line to finish off all those mention() messages we just printed. */
2731 printf_filtered ("\n");
2735 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
2736 If from_tty is nonzero, it prints a message to that effect,
2737 which ends with a period (no newline). */
2740 set_ignore_count (bptnum
, count
, from_tty
)
2741 int bptnum
, count
, from_tty
;
2743 register struct breakpoint
*b
;
2749 if (b
->number
== bptnum
)
2751 b
->ignore_count
= count
;
2754 else if (count
== 0)
2755 printf_filtered ("Will stop next time breakpoint %d is reached.",
2757 else if (count
== 1)
2758 printf_filtered ("Will ignore next crossing of breakpoint %d.",
2761 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
2766 error ("No breakpoint number %d.", bptnum
);
2769 /* Clear the ignore counts of all breakpoints. */
2771 breakpoint_clear_ignore_counts ()
2773 struct breakpoint
*b
;
2776 b
->ignore_count
= 0;
2779 /* Command to set ignore-count of breakpoint N to COUNT. */
2782 ignore_command (args
, from_tty
)
2790 error_no_arg ("a breakpoint number");
2792 num
= get_number (&p
);
2795 error ("Second argument (specified ignore-count) is missing.");
2797 set_ignore_count (num
,
2798 longest_to_int (value_as_long (parse_and_eval (p
))),
2800 printf_filtered ("\n");
2803 /* Call FUNCTION on each of the breakpoints
2804 whose numbers are given in ARGS. */
2807 map_breakpoint_numbers (args
, function
)
2809 void (*function
) PARAMS ((struct breakpoint
*));
2811 register char *p
= args
;
2814 register struct breakpoint
*b
;
2817 error_no_arg ("one or more breakpoint numbers");
2823 num
= get_number (&p1
);
2826 if (b
->number
== num
)
2831 printf ("No breakpoint number %d.\n", num
);
2838 enable_breakpoint (bpt
)
2839 struct breakpoint
*bpt
;
2841 FRAME save_selected_frame
= NULL
;
2842 int save_selected_frame_level
= -1;
2844 bpt
->enable
= enabled
;
2846 if (xgdb_verbose
&& bpt
->type
== bp_breakpoint
)
2847 printf ("breakpoint #%d enabled\n", bpt
->number
);
2849 check_duplicates (bpt
->address
);
2850 if (bpt
->type
== bp_watchpoint
)
2852 if (bpt
->exp_valid_block
!= NULL
)
2854 FRAME fr
= within_scope (bpt
->exp_valid_block
);
2858 Cannot enable watchpoint %d because the block in which its expression\n\
2859 is valid is not currently in scope.\n", bpt
->number
);
2860 bpt
->enable
= disabled
;
2863 save_selected_frame
= selected_frame
;
2864 save_selected_frame_level
= selected_frame_level
;
2865 select_frame (fr
, -1);
2868 value_free (bpt
->val
);
2870 bpt
->val
= evaluate_expression (bpt
->exp
);
2871 release_value (bpt
->val
);
2872 if (VALUE_LAZY (bpt
->val
))
2873 value_fetch_lazy (bpt
->val
);
2875 if (save_selected_frame_level
>= 0)
2876 select_frame (save_selected_frame
, save_selected_frame_level
);
2882 enable_command (args
, from_tty
)
2886 struct breakpoint
*bpt
;
2888 ALL_BREAKPOINTS (bpt
)
2893 enable_breakpoint (bpt
);
2898 map_breakpoint_numbers (args
, enable_breakpoint
);
2902 disable_breakpoint (bpt
)
2903 struct breakpoint
*bpt
;
2905 bpt
->enable
= disabled
;
2907 if (xgdb_verbose
&& bpt
->type
== bp_breakpoint
)
2908 printf_filtered ("breakpoint #%d disabled\n", bpt
->number
);
2910 check_duplicates (bpt
->address
);
2915 disable_command (args
, from_tty
)
2919 register struct breakpoint
*bpt
;
2921 ALL_BREAKPOINTS (bpt
)
2926 disable_breakpoint (bpt
);
2931 map_breakpoint_numbers (args
, disable_breakpoint
);
2935 enable_once_breakpoint (bpt
)
2936 struct breakpoint
*bpt
;
2938 bpt
->enable
= enabled
;
2939 bpt
->disposition
= disable
;
2941 check_duplicates (bpt
->address
);
2946 enable_once_command (args
, from_tty
)
2950 map_breakpoint_numbers (args
, enable_once_breakpoint
);
2954 enable_delete_breakpoint (bpt
)
2955 struct breakpoint
*bpt
;
2957 bpt
->enable
= enabled
;
2958 bpt
->disposition
= delete;
2960 check_duplicates (bpt
->address
);
2965 enable_delete_command (args
, from_tty
)
2969 map_breakpoint_numbers (args
, enable_delete_breakpoint
);
2973 * Use default_breakpoint_'s, or nothing if they aren't valid.
2975 struct symtabs_and_lines
2976 decode_line_spec_1 (string
, funfirstline
)
2980 struct symtabs_and_lines sals
;
2982 error ("Empty line specification.");
2983 if (default_breakpoint_valid
)
2984 sals
= decode_line_1 (&string
, funfirstline
,
2985 default_breakpoint_symtab
, default_breakpoint_line
,
2988 sals
= decode_line_1 (&string
, funfirstline
,
2989 (struct symtab
*)NULL
, 0, (char ***)NULL
);
2991 error ("Junk at end of line specification: %s", string
);
2996 _initialize_breakpoint ()
2998 breakpoint_chain
= 0;
2999 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
3000 before a breakpoint is set. */
3001 breakpoint_count
= 0;
3003 add_com ("ignore", class_breakpoint
, ignore_command
,
3004 "Set ignore-count of breakpoint number N to COUNT.");
3006 add_com ("commands", class_breakpoint
, commands_command
,
3007 "Set commands to be executed when a breakpoint is hit.\n\
3008 Give breakpoint number as argument after \"commands\".\n\
3009 With no argument, the targeted breakpoint is the last one set.\n\
3010 The commands themselves follow starting on the next line.\n\
3011 Type a line containing \"end\" to indicate the end of them.\n\
3012 Give \"silent\" as the first line to make the breakpoint silent;\n\
3013 then no output is printed when it is hit, except what the commands print.");
3015 add_com ("condition", class_breakpoint
, condition_command
,
3016 "Specify breakpoint number N to break only if COND is true.\n\
3017 N is an integer; COND is an expression to be evaluated whenever\n\
3018 breakpoint N is reached. ");
3020 add_com ("tbreak", class_breakpoint
, tbreak_command
,
3021 "Set a temporary breakpoint. Args like \"break\" command.\n\
3022 Like \"break\" except the breakpoint is only enabled temporarily,\n\
3023 so it will be disabled when hit. Equivalent to \"break\" followed\n\
3024 by using \"enable once\" on the breakpoint number.");
3026 add_prefix_cmd ("enable", class_breakpoint
, enable_command
,
3027 "Enable some breakpoints.\n\
3028 Give breakpoint numbers (separated by spaces) as arguments.\n\
3029 With no subcommand, breakpoints are enabled until you command otherwise.\n\
3030 This is used to cancel the effect of the \"disable\" command.\n\
3031 With a subcommand you can enable temporarily.",
3032 &enablelist
, "enable ", 1, &cmdlist
);
3034 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint
, enable_command
,
3035 "Enable some breakpoints.\n\
3036 Give breakpoint numbers (separated by spaces) as arguments.\n\
3037 This is used to cancel the effect of the \"disable\" command.\n\
3038 May be abbreviated to simply \"enable\".\n",
3039 &enablebreaklist
, "enable breakpoints ", 1, &enablelist
);
3041 add_cmd ("once", no_class
, enable_once_command
,
3042 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
3043 If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\
3044 See the \"tbreak\" command which sets a breakpoint and enables it once.",
3047 add_cmd ("delete", no_class
, enable_delete_command
,
3048 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
3049 If a breakpoint is hit while enabled in this fashion, it is deleted.",
3052 add_cmd ("delete", no_class
, enable_delete_command
,
3053 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
3054 If a breakpoint is hit while enabled in this fashion, it is deleted.",
3057 add_cmd ("once", no_class
, enable_once_command
,
3058 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
3059 If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\
3060 See the \"tbreak\" command which sets a breakpoint and enables it once.",
3063 add_prefix_cmd ("disable", class_breakpoint
, disable_command
,
3064 "Disable some breakpoints.\n\
3065 Arguments are breakpoint numbers with spaces in between.\n\
3066 To disable all breakpoints, give no argument.\n\
3067 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
3068 &disablelist
, "disable ", 1, &cmdlist
);
3069 add_com_alias ("dis", "disable", class_breakpoint
, 1);
3070 add_com_alias ("disa", "disable", class_breakpoint
, 1);
3072 add_cmd ("breakpoints", class_alias
, disable_command
,
3073 "Disable some breakpoints.\n\
3074 Arguments are breakpoint numbers with spaces in between.\n\
3075 To disable all breakpoints, give no argument.\n\
3076 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
3077 This command may be abbreviated \"disable\".",
3080 add_prefix_cmd ("delete", class_breakpoint
, delete_command
,
3081 "Delete some breakpoints or auto-display expressions.\n\
3082 Arguments are breakpoint numbers with spaces in between.\n\
3083 To delete all breakpoints, give no argument.\n\
3085 Also a prefix command for deletion of other GDB objects.\n\
3086 The \"unset\" command is also an alias for \"delete\".",
3087 &deletelist
, "delete ", 1, &cmdlist
);
3088 add_com_alias ("d", "delete", class_breakpoint
, 1);
3090 add_cmd ("breakpoints", class_alias
, delete_command
,
3091 "Delete some breakpoints or auto-display expressions.\n\
3092 Arguments are breakpoint numbers with spaces in between.\n\
3093 To delete all breakpoints, give no argument.\n\
3094 This command may be abbreviated \"delete\".",
3097 add_com ("clear", class_breakpoint
, clear_command
,
3098 "Clear breakpoint at specified line or function.\n\
3099 Argument may be line number, function name, or \"*\" and an address.\n\
3100 If line number is specified, all breakpoints in that line are cleared.\n\
3101 If function is specified, breakpoints at beginning of function are cleared.\n\
3102 If an address is specified, breakpoints at that address are cleared.\n\n\
3103 With no argument, clears all breakpoints in the line that the selected frame\n\
3106 See also the \"delete\" command which clears breakpoints by number.");
3108 add_com ("break", class_breakpoint
, break_command
,
3109 "Set breakpoint at specified line or function.\n\
3110 Argument may be line number, function name, or \"*\" and an address.\n\
3111 If line number is specified, break at start of code for that line.\n\
3112 If function is specified, break at start of code for that function.\n\
3113 If an address is specified, break at that exact address.\n\
3114 With no arg, uses current execution address of selected stack frame.\n\
3115 This is useful for breaking on return to a stack frame.\n\
3117 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
3119 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
3120 add_com_alias ("b", "break", class_run
, 1);
3121 add_com_alias ("br", "break", class_run
, 1);
3122 add_com_alias ("bre", "break", class_run
, 1);
3123 add_com_alias ("brea", "break", class_run
, 1);
3125 add_info ("breakpoints", breakpoints_info
,
3126 "Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
3127 The \"Type\" column indicates one of:\n\
3128 \tbreakpoint - normal breakpoint\n\
3129 \twatchpoint - watchpoint\n\
3130 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
3131 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
3132 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
3133 address and file/line number respectively.\n\n\
3134 Convenience variable \"$_\" and default examine address for \"x\"\n\
3135 are set to the address of the last breakpoint listed.\n\n\
3136 Convenience variable \"$bpnum\" contains the number of the last\n\
3139 #if MAINTENANCE_CMDS
3141 add_cmd ("breakpoints", class_maintenance
, maintenance_info_breakpoints
,
3142 "Status of all breakpoints, or breakpoint number NUMBER.\n\
3143 The \"Type\" column indicates one of:\n\
3144 \tbreakpoint - normal breakpoint\n\
3145 \twatchpoint - watchpoint\n\
3146 \tlongjmp - internal breakpoint used to step through longjmp()\n\
3147 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
3148 \tuntil - internal breakpoint used by the \"until\" command\n\
3149 \tfinish - internal breakpoint used by the \"finish\" command\n\
3150 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
3151 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
3152 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
3153 address and file/line number respectively.\n\n\
3154 Convenience variable \"$_\" and default examine address for \"x\"\n\
3155 are set to the address of the last breakpoint listed.\n\n\
3156 Convenience variable \"$bpnum\" contains the number of the last\n\
3158 &maintenanceinfolist
);
3160 #endif /* MAINTENANCE_CMDS */
3162 add_com ("catch", class_breakpoint
, catch_command
,
3163 "Set breakpoints to catch exceptions that are raised.\n\
3164 Argument may be a single exception to catch, multiple exceptions\n\
3165 to catch, or the default exception \"default\". If no arguments\n\
3166 are given, breakpoints are set at all exception handlers catch clauses\n\
3167 within the current scope.\n\
3169 A condition specified for the catch applies to all breakpoints set\n\
3170 with this command\n\
3172 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
3174 add_com ("watch", class_breakpoint
, watch_command
,
3175 "Set a watchpoint for an expression.\n\
3176 A watchpoint stops execution of your program whenever the value of\n\
3177 an expression changes.");
3179 add_info ("watchpoints", breakpoints_info
,
3180 "Synonym for ``info breakpoints''.");
3183 /* OK, when we call objfile_relocate, we need to relocate breakpoints
3184 too. breakpoint_re_set is not a good choice--for example, if
3185 addr_string contains just a line number without a file name the
3186 breakpoint might get set in a different file. In general, there is
3187 no need to go all the way back to the user's string (though this might
3188 work if some effort were made to canonicalize it), since symtabs and
3189 everything except addresses are still valid.
3191 Probably the best way to solve this is to have each breakpoint save
3192 the objfile and the section number that was used to set it (if set
3193 by "*addr", probably it is best to use find_pc_line to get a symtab
3194 and use the objfile and block_line_section for that symtab). Then
3195 objfile_relocate can call fixup_breakpoints with the objfile and
3196 the new_offsets, and it can relocate only the appropriate breakpoints. */
3198 #ifdef IBM6000_TARGET
3199 /* But for now, just kludge it based on the concept that before an
3200 objfile is relocated the breakpoint is below 0x10000000, and afterwards
3201 it is higher, so that way we only relocate each breakpoint once. */
3204 fixup_breakpoints (low
, high
, delta
)
3209 struct breakpoint
*b
;
3213 if (b
->address
>= low
&& b
->address
<= high
)
3214 b
->address
+= delta
;