1 /* Everything about breakpoints, for GDB.
2 Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
25 #include "breakpoint.h"
27 #include "expression.h"
41 /* local function prototypes */
44 catch_command_1 PARAMS ((char *, int, int));
47 enable_delete_command PARAMS ((char *, int));
50 enable_delete_breakpoint PARAMS ((struct breakpoint *));
53 enable_once_command PARAMS ((char *, int));
56 enable_once_breakpoint PARAMS ((struct breakpoint *));
59 disable_command PARAMS ((char *, int));
62 disable_breakpoint PARAMS ((struct breakpoint *));
65 enable_command PARAMS ((char *, int));
68 enable_breakpoint PARAMS ((struct breakpoint *));
71 map_breakpoint_numbers PARAMS ((char *, void (*)(struct breakpoint *)));
74 ignore_command PARAMS ((char *, int));
77 breakpoint_re_set_one PARAMS ((char *));
80 delete_command PARAMS ((char *, int));
83 clear_command PARAMS ((char *, int));
86 catch_command PARAMS ((char *, int));
88 static struct symtabs_and_lines
89 get_catch_sals PARAMS ((int));
92 watch_command PARAMS ((char *, int));
95 can_use_hardware_watchpoint PARAMS ((struct value *));
98 tbreak_command PARAMS ((char *, int));
101 break_command_1 PARAMS ((char *, int, int));
104 mention PARAMS ((struct breakpoint *));
106 static struct breakpoint *
107 set_raw_breakpoint PARAMS ((struct symtab_and_line));
110 check_duplicates PARAMS ((CORE_ADDR));
113 describe_other_breakpoints PARAMS ((CORE_ADDR));
116 breakpoints_info PARAMS ((char *, int));
119 breakpoint_1 PARAMS ((int, int));
122 bpstat_alloc PARAMS ((struct breakpoint *, bpstat));
125 breakpoint_cond_eval PARAMS ((char *));
128 cleanup_executing_breakpoints PARAMS ((int));
131 commands_command PARAMS ((char *, int));
134 condition_command PARAMS ((char *, int));
137 get_number PARAMS ((char **));
140 set_breakpoint_count PARAMS ((int));
143 remove_breakpoint PARAMS ((struct breakpoint *));
145 extern int addressprint; /* Print machine addresses? */
147 /* Are we executing breakpoint commands? */
148 static int executing_breakpoint_commands;
150 /* Walk the following statement or block through all breakpoints.
151 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
154 #define ALL_BREAKPOINTS(b) for (b = breakpoint_chain; b; b = b->next)
156 #define ALL_BREAKPOINTS_SAFE(b,tmp) \
157 for (b = breakpoint_chain; \
158 b? (tmp=b->next, 1): 0; \
161 /* By default no support for hardware watchpoints is assumed. */
162 #ifndef TARGET_CAN_USE_HARDWARE_WATCHPOINT
163 #define TARGET_CAN_USE_HARDWARE_WATCHPOINT(TYPE,CNT,OTHERTYPE) 0
164 #define target_remove_watchpoint(ADDR,LEN,TYPE) -1
165 #define target_insert_watchpoint(ADDR,LEN,TYPE) -1
168 #ifndef target_insert_hw_breakpoint
169 #define target_remove_hw_breakpoint(ADDR,SHADOW) -1
170 #define target_insert_hw_breakpoint(ADDR,SHADOW) -1
173 #ifndef target_stopped_data_address
174 #define target_stopped_data_address() 0
177 /* True if breakpoint hit counts should be displayed in breakpoint info. */
179 int show_breakpoint_hit_counts = 1;
181 /* Chain of all breakpoints defined. */
183 static struct breakpoint *breakpoint_chain;
185 /* Number of last breakpoint made. */
187 static int breakpoint_count;
189 /* Set breakpoint count to NUM. */
192 set_breakpoint_count (num)
195 breakpoint_count = num;
196 set_internalvar (lookup_internalvar ("bpnum"),
197 value_from_longest (builtin_type_int, (LONGEST) num));
200 /* Used in run_command to zero the hit count when a new run starts. */
203 clear_breakpoint_hit_counts ()
205 struct breakpoint *b;
211 /* Default address, symtab and line to put a breakpoint at
212 for "break" command with no arg.
213 if default_breakpoint_valid is zero, the other three are
214 not valid, and "break" with no arg is an error.
216 This set by print_stack_frame, which calls set_default_breakpoint. */
218 int default_breakpoint_valid;
219 CORE_ADDR default_breakpoint_address;
220 struct symtab *default_breakpoint_symtab;
221 int default_breakpoint_line;
223 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
224 Advance *PP after the string and any trailing whitespace.
226 Currently the string can either be a number or "$" followed by the name
227 of a convenience variable. Making it an expression wouldn't work well
228 for map_breakpoint_numbers (e.g. "4 + 5 + 6"). */
237 /* Empty line means refer to the last breakpoint. */
238 return breakpoint_count;
241 /* Make a copy of the name, so we can null-terminate it
242 to pass to lookup_internalvar(). */
247 while (isalnum (*p) || *p == '_')
249 varname = (char *) alloca (p - start + 1);
250 strncpy (varname, start, p - start);
251 varname[p - start] = '\0';
252 val = value_of_internalvar (lookup_internalvar (varname));
253 if (TYPE_CODE (VALUE_TYPE (val)) != TYPE_CODE_INT)
255 "Convenience variables used to specify breakpoints must have integer values."
257 retval = (int) value_as_long (val);
263 while (*p >= '0' && *p <= '9')
266 /* There is no number here. (e.g. "cond a == b"). */
267 error_no_arg ("breakpoint number");
270 if (!(isspace (*p) || *p == '\0'))
271 error ("breakpoint number expected");
278 /* condition N EXP -- set break condition of breakpoint N to EXP. */
281 condition_command (arg, from_tty)
285 register struct breakpoint *b;
290 error_no_arg ("breakpoint number");
293 bnum = get_number (&p);
296 if (b->number == bnum)
303 if (b->cond_string != NULL)
304 free ((PTR)b->cond_string);
309 b->cond_string = NULL;
311 printf_filtered ("Breakpoint %d now unconditional.\n", bnum);
316 /* I don't know if it matters whether this is the string the user
317 typed in or the decompiled expression. */
318 b->cond_string = savestring (arg, strlen (arg));
319 b->cond = parse_exp_1 (&arg, block_for_pc (b->address), 0);
321 error ("Junk at end of expression");
326 error ("No breakpoint number %d.", bnum);
331 commands_command (arg, from_tty)
335 register struct breakpoint *b;
338 struct command_line *l;
340 /* If we allowed this, we would have problems with when to
341 free the storage, if we change the commands currently
344 if (executing_breakpoint_commands)
345 error ("Can't use the \"commands\" command among a breakpoint's commands.");
348 bnum = get_number (&p);
350 error ("Unexpected extra arguments following breakpoint number.");
353 if (b->number == bnum)
355 if (from_tty && input_from_terminal_p ())
356 printf_filtered ("Type commands for when breakpoint %d is hit, one per line.\n\
357 End with a line saying just \"end\".\n", bnum);
358 l = read_command_lines ();
359 free_command_lines (&b->commands);
361 breakpoints_changed ();
364 error ("No breakpoint number %d.", bnum);
367 extern int memory_breakpoint_size; /* from mem-break.c */
369 /* Like target_read_memory() but if breakpoints are inserted, return
370 the shadow contents instead of the breakpoints themselves.
372 Read "memory data" from whatever target or inferior we have.
373 Returns zero if successful, errno value if not. EIO is used
374 for address out of bounds. If breakpoints are inserted, returns
375 shadow contents, not the breakpoints themselves. From breakpoint.c. */
378 read_memory_nobpt (memaddr, myaddr, len)
384 struct breakpoint *b;
386 if (memory_breakpoint_size < 0)
387 /* No breakpoints on this machine. FIXME: This should be
388 dependent on the debugging target. Probably want
389 target_insert_breakpoint to return a size, saying how many
390 bytes of the shadow contents are used, or perhaps have
391 something like target_xfer_shadow. */
392 return target_read_memory (memaddr, myaddr, len);
396 if (b->type == bp_watchpoint
397 || b->type == bp_hardware_watchpoint
398 || b->type == bp_read_watchpoint
399 || b->type == bp_access_watchpoint
402 else if (b->address + memory_breakpoint_size <= memaddr)
403 /* The breakpoint is entirely before the chunk of memory
406 else if (b->address >= memaddr + len)
407 /* The breakpoint is entirely after the chunk of memory we
412 /* Copy the breakpoint from the shadow contents, and recurse
413 for the things before and after. */
415 /* Addresses and length of the part of the breakpoint that
417 CORE_ADDR membpt = b->address;
418 unsigned int bptlen = memory_breakpoint_size;
419 /* Offset within shadow_contents. */
422 if (membpt < memaddr)
424 /* Only copy the second part of the breakpoint. */
425 bptlen -= memaddr - membpt;
426 bptoffset = memaddr - membpt;
430 if (membpt + bptlen > memaddr + len)
432 /* Only copy the first part of the breakpoint. */
433 bptlen -= (membpt + bptlen) - (memaddr + len);
436 memcpy (myaddr + membpt - memaddr,
437 b->shadow_contents + bptoffset, bptlen);
439 if (membpt > memaddr)
441 /* Copy the section of memory before the breakpoint. */
442 status = read_memory_nobpt (memaddr, myaddr, membpt - memaddr);
447 if (membpt + bptlen < memaddr + len)
449 /* Copy the section of memory after the breakpoint. */
450 status = read_memory_nobpt
452 myaddr + membpt + bptlen - memaddr,
453 memaddr + len - (membpt + bptlen));
460 /* Nothing overlaps. Just call read_memory_noerr. */
461 return target_read_memory (memaddr, myaddr, len);
464 /* insert_breakpoints is used when starting or continuing the program.
465 remove_breakpoints is used when the program stops.
466 Both return zero if successful,
467 or an `errno' value if could not write the inferior. */
470 insert_breakpoints ()
472 register struct breakpoint *b;
474 int disabled_breaks = 0;
477 if (b->type != bp_watchpoint
478 && b->type != bp_hardware_watchpoint
479 && b->type != bp_read_watchpoint
480 && b->type != bp_access_watchpoint
481 && b->enable != disabled
485 if (b->type == bp_hardware_breakpoint)
486 val = target_insert_hw_breakpoint(b->address, b->shadow_contents);
488 val = target_insert_breakpoint(b->address, b->shadow_contents);
491 /* Can't set the breakpoint. */
492 #if defined (DISABLE_UNSETTABLE_BREAK)
493 if (DISABLE_UNSETTABLE_BREAK (b->address))
496 b->enable = disabled;
497 if (!disabled_breaks)
499 target_terminal_ours_for_output ();
500 fprintf_unfiltered (gdb_stderr,
501 "Cannot insert breakpoint %d:\n", b->number);
502 printf_filtered ("Disabling shared library breakpoints:\n");
505 printf_filtered ("%d ", b->number);
510 target_terminal_ours_for_output ();
511 fprintf_unfiltered (gdb_stderr, "Cannot insert breakpoint %d:\n", b->number);
512 #ifdef ONE_PROCESS_WRITETEXT
513 fprintf_unfiltered (gdb_stderr,
514 "The same program may be running in another process.\n");
516 memory_error (val, b->address); /* which bombs us out */
522 else if ((b->type == bp_hardware_watchpoint ||
523 b->type == bp_read_watchpoint ||
524 b->type == bp_access_watchpoint)
525 && b->enable == enabled
530 int saved_level, within_current_scope;
531 value_ptr mark = value_mark ();
534 /* Save the current frame and level so we can restore it after
535 evaluating the watchpoint expression on its own frame. */
536 saved_frame = selected_frame;
537 saved_level = selected_frame_level;
539 /* Determine if the watchpoint is within scope. */
540 if (b->exp_valid_block == NULL)
541 within_current_scope = 1;
544 FRAME fr = find_frame_addr_in_frame_chain (b->watchpoint_frame);
545 within_current_scope = (fr != NULL);
546 if (within_current_scope)
547 select_frame (fr, -1);
550 if (within_current_scope)
552 /* Evaluate the expression and cut the chain of values
553 produced off from the value chain. */
554 v = evaluate_expression (b->exp);
555 value_release_to_mark (mark);
560 /* Look at each value on the value chain. */
561 for ( ; v; v=v->next)
563 /* If it's a memory location, then we must watch it. */
564 if (v->lval == lval_memory)
568 addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
569 len = TYPE_LENGTH (VALUE_TYPE (v));
571 if (b->type == bp_read_watchpoint)
573 else if (b->type == bp_access_watchpoint)
576 val = target_insert_watchpoint (addr, len, type);
585 /* Failure to insert a watchpoint on any memory value in the
586 value chain brings us here. */
588 warning ("Hardware watchpoint %d: Could not insert watchpoint\n",
594 Hardware watchpoint %d deleted because the program has left the block in\n\
595 which its expression is valid.\n", b->number);
596 if (b->related_breakpoint)
597 delete_breakpoint (b->related_breakpoint);
598 delete_breakpoint (b);
601 /* Restore the frame and level. */
602 select_frame (saved_frame, saved_level);
605 printf_filtered ("\n");
611 remove_breakpoints ()
613 register struct breakpoint *b;
620 val = remove_breakpoint (b);
630 remove_breakpoint (b)
631 struct breakpoint *b;
635 if (b->type != bp_watchpoint
636 && b->type != bp_hardware_watchpoint
637 && b->type != bp_read_watchpoint
638 && b->type != bp_access_watchpoint)
640 if (b->type == bp_hardware_breakpoint)
641 val = target_remove_hw_breakpoint(b->address, b->shadow_contents);
643 val = target_remove_breakpoint(b->address, b->shadow_contents);
648 else if ((b->type == bp_hardware_watchpoint ||
649 b->type == bp_read_watchpoint ||
650 b->type == bp_access_watchpoint)
651 && b->enable == enabled
657 /* Walk down the saved value chain. */
658 for (v = b->val_chain; v; v = v->next)
660 /* For each memory reference remove the watchpoint
662 if (v->lval == lval_memory)
666 addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
667 len = TYPE_LENGTH (VALUE_TYPE (v));
668 val = target_remove_watchpoint (addr, len, b->type);
674 /* Failure to remove any of the hardware watchpoints comes here. */
676 error ("Hardware watchpoint %d: Could not remove watchpoint\n",
679 /* Free the saved value chain. We will construct a new one
680 the next time the watchpoint is inserted. */
681 for (v = b->val_chain; v; v = n)
691 /* Clear the "inserted" flag in all breakpoints. */
694 mark_breakpoints_out ()
696 register struct breakpoint *b;
702 /* Clear the "inserted" flag in all breakpoints and delete any breakpoints
703 which should go away between runs of the program. */
706 breakpoint_init_inferior ()
708 register struct breakpoint *b, *temp;
710 ALL_BREAKPOINTS_SAFE (b, temp)
714 /* If the call dummy breakpoint is at the entry point it will
715 cause problems when the inferior is rerun, so we better
717 if (b->type == bp_call_dummy)
718 delete_breakpoint (b);
720 /* Likewise for scope breakpoints. */
721 if (b->type == bp_watchpoint_scope)
722 delete_breakpoint (b);
724 /* Likewise for watchpoints on local expressions. */
725 if ((b->type == bp_watchpoint || b->type == bp_hardware_watchpoint ||
726 b->type == bp_read_watchpoint || b->type == bp_access_watchpoint)
727 && b->exp_valid_block != NULL)
728 delete_breakpoint (b);
732 /* breakpoint_here_p (PC) returns 1 if an enabled breakpoint exists at PC.
733 When continuing from a location with a breakpoint,
734 we actually single step once before calling insert_breakpoints. */
737 breakpoint_here_p (pc)
740 register struct breakpoint *b;
743 if (b->enable != disabled && b->address == pc)
749 /* Return nonzero if FRAME is a dummy frame. We can't use PC_IN_CALL_DUMMY
750 because figuring out the saved SP would take too much time, at least using
751 get_saved_register on the 68k. This means that for this function to
752 work right a port must use the bp_call_dummy breakpoint. */
755 frame_in_dummy (frame)
758 struct breakpoint *b;
763 static unsigned LONGEST dummy[] = CALL_DUMMY;
765 if (b->type == bp_call_dummy
766 && b->frame == frame->frame
768 /* We need to check the PC as well as the frame on the sparc,
769 for signals.exp in the testsuite. */
772 - sizeof (dummy) / sizeof (LONGEST) * REGISTER_SIZE))
773 && frame->pc <= b->address)
776 #endif /* CALL_DUMMY */
780 /* breakpoint_match_thread (PC, PID) returns true if the breakpoint at PC
781 is valid for process/thread PID. */
784 breakpoint_thread_match (pc, pid)
788 struct breakpoint *b;
791 thread = pid_to_thread_id (pid);
794 if (b->enable != disabled
796 && (b->thread == -1 || b->thread == thread))
803 /* bpstat stuff. External routines' interfaces are documented
806 /* Clear a bpstat so that it says we are not at any breakpoint.
807 Also free any storage that is part of a bpstat. */
822 if (p->old_val != NULL)
823 value_free (p->old_val);
830 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
831 is part of the bpstat is copied as well. */
839 bpstat retval = NULL;
844 for (; bs != NULL; bs = bs->next)
846 tmp = (bpstat) xmalloc (sizeof (*tmp));
847 memcpy (tmp, bs, sizeof (*tmp));
849 /* This is the first thing in the chain. */
859 /* Find the bpstat associated with this breakpoint */
862 bpstat_find_breakpoint(bsp, breakpoint)
864 struct breakpoint *breakpoint;
866 if (bsp == NULL) return NULL;
868 for (;bsp != NULL; bsp = bsp->next) {
869 if (bsp->breakpoint_at == breakpoint) return bsp;
874 /* Return the breakpoint number of the first breakpoint we are stopped
875 at. *BSP upon return is a bpstat which points to the remaining
876 breakpoints stopped at (but which is not guaranteed to be good for
877 anything but further calls to bpstat_num).
878 Return 0 if passed a bpstat which does not indicate any breakpoints. */
884 struct breakpoint *b;
887 return 0; /* No more breakpoint values */
890 b = (*bsp)->breakpoint_at;
893 return -1; /* breakpoint that's been deleted since */
895 return b->number; /* We have its number */
899 /* Modify BS so that the actions will not be performed. */
902 bpstat_clear_actions (bs)
905 for (; bs != NULL; bs = bs->next)
908 if (bs->old_val != NULL)
910 value_free (bs->old_val);
916 /* Stub for cleaning up our state if we error-out of a breakpoint command */
919 cleanup_executing_breakpoints (ignore)
922 executing_breakpoint_commands = 0;
925 /* Execute all the commands associated with all the breakpoints at this
926 location. Any of these commands could cause the process to proceed
927 beyond this point, etc. We look out for such changes by checking
928 the global "breakpoint_proceeded" after each command. */
931 bpstat_do_actions (bsp)
935 struct cleanup *old_chain;
937 executing_breakpoint_commands = 1;
938 old_chain = make_cleanup (cleanup_executing_breakpoints, 0);
943 breakpoint_proceeded = 0;
944 for (; bs != NULL; bs = bs->next)
948 char *line = bs->commands->line;
949 bs->commands = bs->commands->next;
950 execute_command (line, 0);
951 /* If the inferior is proceeded by the command, bomb out now.
952 The bpstat chain has been blown away by wait_for_inferior.
953 But since execution has stopped again, there is a new bpstat
954 to look at, so start over. */
955 if (breakpoint_proceeded)
960 executing_breakpoint_commands = 0;
961 discard_cleanups (old_chain);
964 /* This is the normal print_it function for a bpstat. In the future,
965 much of this logic could (should?) be moved to bpstat_stop_status,
966 by having it set different print_it functions. */
972 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
973 which has since been deleted. */
974 if (bs->breakpoint_at == NULL
975 || (bs->breakpoint_at->type != bp_breakpoint
976 && bs->breakpoint_at->type != bp_hardware_breakpoint
977 && bs->breakpoint_at->type != bp_watchpoint
978 && bs->breakpoint_at->type != bp_read_watchpoint
979 && bs->breakpoint_at->type != bp_access_watchpoint
980 && bs->breakpoint_at->type != bp_hardware_watchpoint))
983 if (bs->breakpoint_at->type == bp_breakpoint ||
984 bs->breakpoint_at->type == bp_hardware_breakpoint)
986 /* I think the user probably only wants to see one breakpoint
987 number, not all of them. */
988 annotate_breakpoint (bs->breakpoint_at->number);
989 printf_filtered ("\nBreakpoint %d, ", bs->breakpoint_at->number);
992 else if ((bs->old_val != NULL) &&
993 (bs->breakpoint_at->type == bp_watchpoint ||
994 bs->breakpoint_at->type == bp_access_watchpoint ||
995 bs->breakpoint_at->type == bp_hardware_watchpoint))
997 annotate_watchpoint (bs->breakpoint_at->number);
998 mention (bs->breakpoint_at);
999 printf_filtered ("\nOld value = ");
1000 value_print (bs->old_val, gdb_stdout, 0, Val_pretty_default);
1001 printf_filtered ("\nNew value = ");
1002 value_print (bs->breakpoint_at->val, gdb_stdout, 0,
1003 Val_pretty_default);
1004 printf_filtered ("\n");
1005 value_free (bs->old_val);
1007 /* More than one watchpoint may have been triggered. */
1010 else if (bs->breakpoint_at->type == bp_access_watchpoint ||
1011 bs->breakpoint_at->type == bp_read_watchpoint)
1013 mention (bs->breakpoint_at);
1014 printf_filtered ("\nValue = ");
1015 value_print (bs->breakpoint_at->val, gdb_stdout, 0,
1016 Val_pretty_default);
1017 printf_filtered ("\n");
1020 /* We can't deal with it. Maybe another member of the bpstat chain can. */
1024 /* Print a message indicating what happened. Returns nonzero to
1025 say that only the source line should be printed after this (zero
1026 return means print the frame as well as the source line). */
1027 /* Currently we always return zero. */
1037 val = (*bs->print_it) (bs);
1041 /* Maybe another breakpoint in the chain caused us to stop.
1042 (Currently all watchpoints go on the bpstat whether hit or
1043 not. That probably could (should) be changed, provided care is taken
1044 with respect to bpstat_explains_signal). */
1046 return bpstat_print (bs->next);
1048 /* We reached the end of the chain without printing anything. */
1052 /* Evaluate the expression EXP and return 1 if value is zero.
1053 This is used inside a catch_errors to evaluate the breakpoint condition.
1054 The argument is a "struct expression *" that has been cast to char * to
1055 make it pass through catch_errors. */
1058 breakpoint_cond_eval (exp)
1061 value_ptr mark = value_mark ();
1062 int i = !value_true (evaluate_expression ((struct expression *)exp));
1063 value_free_to_mark (mark);
1067 /* Allocate a new bpstat and chain it to the current one. */
1070 bpstat_alloc (b, cbs)
1071 register struct breakpoint *b;
1072 bpstat cbs; /* Current "bs" value */
1076 bs = (bpstat) xmalloc (sizeof (*bs));
1078 bs->breakpoint_at = b;
1079 /* If the condition is false, etc., don't do the commands. */
1080 bs->commands = NULL;
1082 bs->print_it = print_it_normal;
1086 /* Possible return values for watchpoint_check (this can't be an enum
1087 because of check_errors). */
1088 /* The watchpoint has been deleted. */
1089 #define WP_DELETED 1
1090 /* The value has changed. */
1091 #define WP_VALUE_CHANGED 2
1092 /* The value has not changed. */
1093 #define WP_VALUE_NOT_CHANGED 3
1095 /* Check watchpoint condition. */
1098 watchpoint_check (p)
1101 bpstat bs = (bpstat) p;
1102 struct breakpoint *b;
1103 FRAME saved_frame, fr;
1104 int within_current_scope, saved_level;
1106 /* Save the current frame and level so we can restore it after
1107 evaluating the watchpoint expression on its own frame. */
1108 saved_frame = selected_frame;
1109 saved_level = selected_frame_level;
1111 b = bs->breakpoint_at;
1113 if (b->exp_valid_block == NULL)
1114 within_current_scope = 1;
1117 fr = find_frame_addr_in_frame_chain (b->watchpoint_frame);
1118 within_current_scope = (fr != NULL);
1119 if (within_current_scope)
1120 /* If we end up stopping, the current frame will get selected
1121 in normal_stop. So this call to select_frame won't affect
1123 select_frame (fr, -1);
1126 if (within_current_scope)
1128 /* We use value_{,free_to_}mark because it could be a
1129 *long* time before we return to the command level and
1130 call free_all_values. We can't call free_all_values because
1131 we might be in the middle of evaluating a function call. */
1133 value_ptr mark = value_mark ();
1134 value_ptr new_val = evaluate_expression (bs->breakpoint_at->exp);
1135 if (!value_equal (b->val, new_val))
1137 release_value (new_val);
1138 value_free_to_mark (mark);
1139 bs->old_val = b->val;
1141 /* We will stop here */
1142 select_frame (saved_frame, saved_level);
1143 return WP_VALUE_CHANGED;
1147 /* Nothing changed, don't do anything. */
1148 value_free_to_mark (mark);
1149 /* We won't stop here */
1150 select_frame (saved_frame, saved_level);
1151 return WP_VALUE_NOT_CHANGED;
1156 /* This seems like the only logical thing to do because
1157 if we temporarily ignored the watchpoint, then when
1158 we reenter the block in which it is valid it contains
1159 garbage (in the case of a function, it may have two
1160 garbage values, one before and one after the prologue).
1161 So we can't even detect the first assignment to it and
1162 watch after that (since the garbage may or may not equal
1163 the first value assigned). */
1165 Watchpoint %d deleted because the program has left the block in\n\
1166 which its expression is valid.\n", bs->breakpoint_at->number);
1167 if (b->related_breakpoint)
1168 delete_breakpoint (b->related_breakpoint);
1169 delete_breakpoint (b);
1171 select_frame (saved_frame, saved_level);
1176 /* This is used when everything which needs to be printed has
1177 already been printed. But we still want to print the frame. */
1185 /* This is used when nothing should be printed for this bpstat entry. */
1194 /* Get a bpstat associated with having just stopped at address *PC
1195 and frame address FRAME_ADDRESS. Update *PC to point at the
1196 breakpoint (if we hit a breakpoint). NOT_A_BREAKPOINT is nonzero
1197 if this is known to not be a real breakpoint (it could still be a
1198 watchpoint, though). */
1200 /* Determine whether we stopped at a breakpoint, etc, or whether we
1201 don't understand this stop. Result is a chain of bpstat's such that:
1203 if we don't understand the stop, the result is a null pointer.
1205 if we understand why we stopped, the result is not null.
1207 Each element of the chain refers to a particular breakpoint or
1208 watchpoint at which we have stopped. (We may have stopped for
1209 several reasons concurrently.)
1211 Each element of the chain has valid next, breakpoint_at,
1212 commands, FIXME??? fields.
1217 bpstat_stop_status (pc, frame_address, not_a_breakpoint)
1219 FRAME_ADDR frame_address;
1220 int not_a_breakpoint;
1222 register struct breakpoint *b;
1224 #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
1225 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
1226 int real_breakpoint = 0;
1228 /* Root of the chain of bpstat's */
1229 struct bpstat root_bs[1];
1230 /* Pointer to the last thing in the chain currently. */
1231 bpstat bs = root_bs;
1232 static char message1[] =
1233 "Error evaluating expression for watchpoint %d\n";
1234 char message[sizeof (message1) + 30 /* slop */];
1236 /* Get the address where the breakpoint would have been. */
1237 bp_addr = *pc - DECR_PC_AFTER_BREAK;
1241 if (b->enable == disabled)
1244 if (b->type != bp_watchpoint
1245 && b->type != bp_hardware_watchpoint
1246 && b->type != bp_read_watchpoint
1247 && b->type != bp_access_watchpoint
1248 && b->type != bp_hardware_breakpoint
1249 && b->address != bp_addr)
1252 #ifndef DECR_PC_AFTER_HW_BREAK
1253 #define DECR_PC_AFTER_HW_BREAK 0
1255 if (b->type == bp_hardware_breakpoint
1256 && b->address != (bp_addr - DECR_PC_AFTER_HW_BREAK))
1259 if (b->type != bp_watchpoint
1260 && b->type != bp_hardware_watchpoint
1261 && b->type != bp_read_watchpoint
1262 && b->type != bp_access_watchpoint
1263 && not_a_breakpoint)
1266 /* Come here if it's a watchpoint, or if the break address matches */
1270 bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */
1275 sprintf (message, message1, b->number);
1276 if (b->type == bp_watchpoint || b->type == bp_hardware_watchpoint)
1278 switch (catch_errors (watchpoint_check, (char *) bs, message,
1282 /* We've already printed what needs to be printed. */
1283 bs->print_it = print_it_done;
1286 case WP_VALUE_CHANGED:
1289 case WP_VALUE_NOT_CHANGED:
1291 bs->print_it = print_it_noop;
1298 /* Error from catch_errors. */
1299 printf_filtered ("Watchpoint %d deleted.\n", b->number);
1300 if (b->related_breakpoint)
1301 delete_breakpoint (b->related_breakpoint);
1302 delete_breakpoint (b);
1303 /* We've already printed what needs to be printed. */
1304 bs->print_it = print_it_done;
1310 else if (b->type == bp_read_watchpoint || b->type == bp_access_watchpoint)
1316 addr = target_stopped_data_address();
1317 if (addr == 0) continue;
1318 for (v = b->val_chain; v; v = v->next)
1320 if (v->lval == lval_memory)
1324 vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
1330 switch (catch_errors (watchpoint_check, (char *) bs, message,
1334 /* We've already printed what needs to be printed. */
1335 bs->print_it = print_it_done;
1338 case WP_VALUE_CHANGED:
1339 case WP_VALUE_NOT_CHANGED:
1345 /* Error from catch_errors. */
1346 printf_filtered ("Watchpoint %d deleted.\n", b->number);
1347 if (b->related_breakpoint)
1348 delete_breakpoint (b->related_breakpoint);
1349 delete_breakpoint (b);
1350 /* We've already printed what needs to be printed. */
1351 bs->print_it = print_it_done;
1355 #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
1357 real_breakpoint = 1;
1360 if (b->frame && b->frame != frame_address)
1364 int value_is_zero = 0;
1368 /* Need to select the frame, with all that implies
1369 so that the conditions will have the right context. */
1370 select_frame (get_current_frame (), 0);
1372 = catch_errors (breakpoint_cond_eval, (char *)(b->cond),
1373 "Error in testing breakpoint condition:\n",
1375 /* FIXME-someday, should give breakpoint # */
1378 if (b->cond && value_is_zero)
1382 else if (b->ignore_count > 0)
1389 /* We will stop here */
1390 if (b->disposition == disable)
1391 b->enable = disabled;
1392 bs->commands = b->commands;
1395 if (bs->commands && STREQ ("silent", bs->commands->line))
1397 bs->commands = bs->commands->next;
1402 /* Print nothing for this entry if we dont stop or if we dont print. */
1403 if (bs->stop == 0 || bs->print == 0)
1404 bs->print_it = print_it_noop;
1407 bs->next = NULL; /* Terminate the chain */
1408 bs = root_bs->next; /* Re-grab the head of the chain */
1409 #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
1412 if (real_breakpoint)
1415 #if defined (SHIFT_INST_REGS)
1417 #else /* No SHIFT_INST_REGS. */
1419 #endif /* No SHIFT_INST_REGS. */
1422 #endif /* DECR_PC_AFTER_BREAK != 0. */
1424 /* The value of a hardware watchpoint hasn't changed, but the
1425 intermediate memory locations we are watching may have. */
1426 if (bs && ! bs->stop &&
1427 (bs->breakpoint_at->type == bp_hardware_watchpoint ||
1428 bs->breakpoint_at->type == bp_read_watchpoint ||
1429 bs->breakpoint_at->type == bp_access_watchpoint))
1431 remove_breakpoints ();
1432 insert_breakpoints ();
1437 /* Tell what to do about this bpstat. */
1442 /* Classify each bpstat as one of the following. */
1444 /* This bpstat element has no effect on the main_action. */
1447 /* There was a watchpoint, stop but don't print. */
1450 /* There was a watchpoint, stop and print. */
1453 /* There was a breakpoint but we're not stopping. */
1456 /* There was a breakpoint, stop but don't print. */
1459 /* There was a breakpoint, stop and print. */
1462 /* We hit the longjmp breakpoint. */
1465 /* We hit the longjmp_resume breakpoint. */
1468 /* We hit the step_resume breakpoint. */
1471 /* We hit the through_sigtramp breakpoint. */
1474 /* This is just used to count how many enums there are. */
1478 /* Here is the table which drives this routine. So that we can
1479 format it pretty, we define some abbreviations for the
1480 enum bpstat_what codes. */
1481 #define keep_c BPSTAT_WHAT_KEEP_CHECKING
1482 #define stop_s BPSTAT_WHAT_STOP_SILENT
1483 #define stop_n BPSTAT_WHAT_STOP_NOISY
1484 #define single BPSTAT_WHAT_SINGLE
1485 #define setlr BPSTAT_WHAT_SET_LONGJMP_RESUME
1486 #define clrlr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
1487 #define clrlrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
1488 #define sr BPSTAT_WHAT_STEP_RESUME
1489 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
1491 /* "Can't happen." Might want to print an error message.
1492 abort() is not out of the question, but chances are GDB is just
1493 a bit confused, not unusable. */
1494 #define err BPSTAT_WHAT_STOP_NOISY
1496 /* Given an old action and a class, come up with a new action. */
1497 /* One interesting property of this table is that wp_silent is the same
1498 as bp_silent and wp_noisy is the same as bp_noisy. That is because
1499 after stopping, the check for whether to step over a breakpoint
1500 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
1501 reference to how we stopped. We retain separate wp_silent and bp_silent
1502 codes in case we want to change that someday. */
1504 /* step_resume entries: a step resume breakpoint overrides another
1505 breakpoint of signal handling (see comment in wait_for_inferior
1506 at first IN_SIGTRAMP where we set the step_resume breakpoint). */
1507 /* We handle the through_sigtramp_breakpoint the same way; having both
1508 one of those and a step_resume_breakpoint is probably very rare (?). */
1510 static const enum bpstat_what_main_action
1511 table[(int)class_last][(int)BPSTAT_WHAT_LAST] =
1514 /* keep_c stop_s stop_n single setlr clrlr clrlrs sr ts
1516 /*no_effect*/ {keep_c,stop_s,stop_n,single, setlr , clrlr , clrlrs, sr, ts},
1517 /*wp_silent*/ {stop_s,stop_s,stop_n,stop_s, stop_s, stop_s, stop_s, sr, ts},
1518 /*wp_noisy*/ {stop_n,stop_n,stop_n,stop_n, stop_n, stop_n, stop_n, sr, ts},
1519 /*bp_nostop*/ {single,stop_s,stop_n,single, setlr , clrlrs, clrlrs, sr, ts},
1520 /*bp_silent*/ {stop_s,stop_s,stop_n,stop_s, stop_s, stop_s, stop_s, sr, ts},
1521 /*bp_noisy*/ {stop_n,stop_n,stop_n,stop_n, stop_n, stop_n, stop_n, sr, ts},
1522 /*long_jump*/ {setlr ,stop_s,stop_n,setlr , err , err , err , sr, ts},
1523 /*long_resume*/ {clrlr ,stop_s,stop_n,clrlrs, err , err , err , sr, ts},
1524 /*step_resume*/ {sr ,sr ,sr ,sr , sr , sr , sr , sr, ts},
1525 /*through_sig*/ {ts ,ts ,ts ,ts , ts , ts , ts , ts, ts}
1537 enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING;
1538 struct bpstat_what retval;
1540 retval.call_dummy = 0;
1541 for (; bs != NULL; bs = bs->next)
1543 enum class bs_class = no_effect;
1544 if (bs->breakpoint_at == NULL)
1545 /* I suspect this can happen if it was a momentary breakpoint
1546 which has since been deleted. */
1548 switch (bs->breakpoint_at->type)
1551 case bp_hardware_breakpoint:
1557 bs_class = bp_noisy;
1559 bs_class = bp_silent;
1562 bs_class = bp_nostop;
1565 case bp_hardware_watchpoint:
1566 case bp_read_watchpoint:
1567 case bp_access_watchpoint:
1571 bs_class = wp_noisy;
1573 bs_class = wp_silent;
1576 /* There was a watchpoint, but we're not stopping. This requires
1577 no further action. */
1578 bs_class = no_effect;
1581 bs_class = long_jump;
1583 case bp_longjmp_resume:
1584 bs_class = long_resume;
1586 case bp_step_resume:
1589 bs_class = step_resume;
1592 /* It is for the wrong frame. */
1593 bs_class = bp_nostop;
1595 case bp_through_sigtramp:
1596 bs_class = through_sig;
1598 case bp_watchpoint_scope:
1599 bs_class = bp_nostop;
1603 /* Make sure the action is stop (silent or noisy), so infrun.c
1604 pops the dummy frame. */
1605 bs_class = bp_silent;
1606 retval.call_dummy = 1;
1609 current_action = table[(int)bs_class][(int)current_action];
1611 retval.main_action = current_action;
1615 /* Nonzero if we should step constantly (e.g. watchpoints on machines
1616 without hardware support). This isn't related to a specific bpstat,
1617 just to things like whether watchpoints are set. */
1620 bpstat_should_step ()
1622 struct breakpoint *b;
1624 if (b->enable == enabled && b->type == bp_watchpoint)
1629 /* Print information on breakpoint number BNUM, or -1 if all.
1630 If WATCHPOINTS is zero, process only breakpoints; if WATCHPOINTS
1631 is nonzero, process only watchpoints. */
1634 breakpoint_1 (bnum, allflag)
1638 register struct breakpoint *b;
1639 register struct command_line *l;
1640 register struct symbol *sym;
1641 CORE_ADDR last_addr = (CORE_ADDR)-1;
1642 int found_a_breakpoint = 0;
1643 static char *bptypes[] = {"breakpoint", "hw breakpoint",
1644 "until", "finish", "watchpoint",
1645 "hw watchpoint", "read watchpoint",
1646 "acc watchpoint", "longjmp",
1647 "longjmp resume", "step resume",
1648 "watchpoint scope", "call dummy" };
1649 static char *bpdisps[] = {"del", "dis", "keep"};
1650 static char bpenables[] = "ny";
1651 char wrap_indent[80];
1655 || bnum == b->number)
1657 /* We only print out user settable breakpoints unless the allflag is set. */
1659 && b->type != bp_breakpoint
1660 && b->type != bp_hardware_breakpoint
1661 && b->type != bp_watchpoint
1662 && b->type != bp_read_watchpoint
1663 && b->type != bp_access_watchpoint
1664 && b->type != bp_hardware_watchpoint)
1667 if (!found_a_breakpoint++)
1669 annotate_breakpoints_headers ();
1672 printf_filtered ("Num ");
1674 printf_filtered ("Type ");
1676 printf_filtered ("Disp ");
1678 printf_filtered ("Enb ");
1682 printf_filtered ("Address ");
1685 printf_filtered ("What\n");
1687 annotate_breakpoints_table ();
1692 printf_filtered ("%-3d ", b->number);
1694 printf_filtered ("%-14s ", bptypes[(int)b->type]);
1696 printf_filtered ("%-4s ", bpdisps[(int)b->disposition]);
1698 printf_filtered ("%-3c ", bpenables[(int)b->enable]);
1700 strcpy (wrap_indent, " ");
1702 strcat (wrap_indent, " ");
1706 case bp_hardware_watchpoint:
1707 case bp_read_watchpoint:
1708 case bp_access_watchpoint:
1709 /* Field 4, the address, is omitted (which makes the columns
1710 not line up too nicely with the headers, but the effect
1711 is relatively readable). */
1713 print_expression (b->exp, gdb_stdout);
1717 case bp_hardware_breakpoint:
1721 case bp_longjmp_resume:
1722 case bp_step_resume:
1723 case bp_through_sigtramp:
1724 case bp_watchpoint_scope:
1729 /* FIXME-32x64: need a print_address_numeric with
1733 local_hex_string_custom
1734 ((unsigned long) b->address, "08l"));
1739 last_addr = b->address;
1742 sym = find_pc_function (b->address);
1745 fputs_filtered ("in ", gdb_stdout);
1746 fputs_filtered (SYMBOL_SOURCE_NAME (sym), gdb_stdout);
1747 wrap_here (wrap_indent);
1748 fputs_filtered (" at ", gdb_stdout);
1750 fputs_filtered (b->source_file, gdb_stdout);
1751 printf_filtered (":%d", b->line_number);
1754 print_address_symbolic (b->address, gdb_stdout, demangle, " ");
1758 printf_filtered ("\n");
1764 printf_filtered ("\tstop only in stack frame at ");
1765 print_address_numeric (b->frame, 1, gdb_stdout);
1766 printf_filtered ("\n");
1773 printf_filtered ("\tstop only if ");
1774 print_expression (b->cond, gdb_stdout);
1775 printf_filtered ("\n");
1778 if (show_breakpoint_hit_counts && b->hit_count)
1780 /* FIXME should make an annotation for this */
1782 printf_filtered ("\tbreakpoint already hit %d times\n",
1786 if (b->ignore_count)
1790 printf_filtered ("\tignore next %d hits\n", b->ignore_count);
1793 if ((l = b->commands))
1799 fputs_filtered ("\t", gdb_stdout);
1800 fputs_filtered (l->line, gdb_stdout);
1801 fputs_filtered ("\n", gdb_stdout);
1807 if (!found_a_breakpoint)
1810 printf_filtered ("No breakpoints or watchpoints.\n");
1812 printf_filtered ("No breakpoint or watchpoint number %d.\n", bnum);
1815 /* Compare against (CORE_ADDR)-1 in case some compiler decides
1816 that a comparison of an unsigned with -1 is always false. */
1817 if (last_addr != (CORE_ADDR)-1)
1818 set_next_address (last_addr);
1820 annotate_breakpoints_table_end ();
1825 breakpoints_info (bnum_exp, from_tty)
1832 bnum = parse_and_eval_address (bnum_exp);
1834 breakpoint_1 (bnum, 0);
1837 #if MAINTENANCE_CMDS
1841 maintenance_info_breakpoints (bnum_exp, from_tty)
1848 bnum = parse_and_eval_address (bnum_exp);
1850 breakpoint_1 (bnum, 1);
1855 /* Print a message describing any breakpoints set at PC. */
1858 describe_other_breakpoints (pc)
1859 register CORE_ADDR pc;
1861 register int others = 0;
1862 register struct breakpoint *b;
1865 if (b->address == pc)
1869 printf_filtered ("Note: breakpoint%s ", (others > 1) ? "s" : "");
1871 if (b->address == pc)
1877 (b->enable == disabled) ? " (disabled)" : "",
1878 (others > 1) ? "," : ((others == 1) ? " and" : ""));
1880 printf_filtered ("also set at pc ");
1881 print_address_numeric (pc, 1, gdb_stdout);
1882 printf_filtered (".\n");
1886 /* Set the default place to put a breakpoint
1887 for the `break' command with no arguments. */
1890 set_default_breakpoint (valid, addr, symtab, line)
1893 struct symtab *symtab;
1896 default_breakpoint_valid = valid;
1897 default_breakpoint_address = addr;
1898 default_breakpoint_symtab = symtab;
1899 default_breakpoint_line = line;
1902 /* Rescan breakpoints at address ADDRESS,
1903 marking the first one as "first" and any others as "duplicates".
1904 This is so that the bpt instruction is only inserted once. */
1907 check_duplicates (address)
1910 register struct breakpoint *b;
1911 register int count = 0;
1913 if (address == 0) /* Watchpoints are uninteresting */
1917 if (b->enable != disabled && b->address == address)
1920 b->duplicate = count > 1;
1924 /* Low level routine to set a breakpoint.
1925 Takes as args the three things that every breakpoint must have.
1926 Returns the breakpoint object so caller can set other things.
1927 Does not set the breakpoint number!
1928 Does not print anything.
1930 ==> This routine should not be called if there is a chance of later
1931 error(); otherwise it leaves a bogus breakpoint on the chain. Validate
1932 your arguments BEFORE calling this routine! */
1934 static struct breakpoint *
1935 set_raw_breakpoint (sal)
1936 struct symtab_and_line sal;
1938 register struct breakpoint *b, *b1;
1940 b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint));
1941 memset (b, 0, sizeof (*b));
1942 b->address = sal.pc;
1943 if (sal.symtab == NULL)
1944 b->source_file = NULL;
1946 b->source_file = savestring (sal.symtab->filename,
1947 strlen (sal.symtab->filename));
1949 b->line_number = sal.line;
1950 b->enable = enabled;
1953 b->ignore_count = 0;
1957 /* Add this breakpoint to the end of the chain
1958 so that a list of breakpoints will come out in order
1959 of increasing numbers. */
1961 b1 = breakpoint_chain;
1963 breakpoint_chain = b;
1971 check_duplicates (sal.pc);
1972 breakpoints_changed ();
1978 create_longjmp_breakpoint(func_name)
1981 struct symtab_and_line sal;
1982 struct breakpoint *b;
1983 static int internal_breakpoint_number = -1;
1985 if (func_name != NULL)
1987 struct minimal_symbol *m;
1989 m = lookup_minimal_symbol(func_name, (struct objfile *)NULL);
1991 sal.pc = SYMBOL_VALUE_ADDRESS (m);
2001 b = set_raw_breakpoint(sal);
2004 b->type = func_name != NULL ? bp_longjmp : bp_longjmp_resume;
2005 b->disposition = donttouch;
2006 b->enable = disabled;
2009 b->addr_string = strsave(func_name);
2010 b->number = internal_breakpoint_number--;
2013 /* Call this routine when stepping and nexting to enable a breakpoint if we do
2014 a longjmp(). When we hit that breakpoint, call
2015 set_longjmp_resume_breakpoint() to figure out where we are going. */
2018 enable_longjmp_breakpoint()
2020 register struct breakpoint *b;
2023 if (b->type == bp_longjmp)
2025 b->enable = enabled;
2026 check_duplicates (b->address);
2031 disable_longjmp_breakpoint()
2033 register struct breakpoint *b;
2036 if ( b->type == bp_longjmp
2037 || b->type == bp_longjmp_resume)
2039 b->enable = disabled;
2040 check_duplicates (b->address);
2045 hw_breakpoint_used_count()
2047 register struct breakpoint *b;
2052 if (b->type == bp_hardware_breakpoint && b->enable == enabled)
2060 hw_watchpoint_used_count(type, other_type_used)
2062 int *other_type_used;
2064 register struct breakpoint *b;
2067 *other_type_used = 0;
2070 if (b->enable == enabled)
2072 if (b->type == type) i++;
2073 else if ((b->type == bp_hardware_watchpoint ||
2074 b->type == bp_read_watchpoint ||
2075 b->type == bp_access_watchpoint)
2076 && b->enable == enabled)
2077 *other_type_used = 1;
2083 /* Call this after hitting the longjmp() breakpoint. Use this to set a new
2084 breakpoint at the target of the jmp_buf.
2086 FIXME - This ought to be done by setting a temporary breakpoint that gets
2087 deleted automatically...
2091 set_longjmp_resume_breakpoint(pc, frame)
2095 register struct breakpoint *b;
2098 if (b->type == bp_longjmp_resume)
2101 b->enable = enabled;
2103 b->frame = FRAME_FP(frame);
2106 check_duplicates (b->address);
2111 /* Set a breakpoint that will evaporate an end of command
2112 at address specified by SAL.
2113 Restrict it to frame FRAME if FRAME is nonzero. */
2116 set_momentary_breakpoint (sal, frame, type)
2117 struct symtab_and_line sal;
2121 register struct breakpoint *b;
2122 b = set_raw_breakpoint (sal);
2124 b->enable = enabled;
2125 b->disposition = donttouch;
2126 b->frame = (frame ? FRAME_FP (frame) : 0);
2132 clear_momentary_breakpoints ()
2134 register struct breakpoint *b;
2136 if (b->disposition == delete)
2138 delete_breakpoint (b);
2144 /* Tell the user we have just set a breakpoint B. */
2148 struct breakpoint *b;
2152 if (create_breakpoint_hook)
2153 create_breakpoint_hook (b);
2158 printf_filtered ("Watchpoint %d: ", b->number);
2159 print_expression (b->exp, gdb_stdout);
2161 case bp_hardware_watchpoint:
2162 printf_filtered ("Hardware watchpoint %d: ", b->number);
2163 print_expression (b->exp, gdb_stdout);
2165 case bp_read_watchpoint:
2166 printf_filtered ("Hardware read watchpoint %d: ", b->number);
2167 print_expression (b->exp, gdb_stdout);
2169 case bp_access_watchpoint:
2170 printf_filtered ("Hardware access(read/write) watchpoint %d: ",b->number);
2171 print_expression (b->exp, gdb_stdout);
2174 printf_filtered ("Breakpoint %d", b->number);
2177 case bp_hardware_breakpoint:
2178 printf_filtered ("Hardware assisted breakpoint %d", b->number);
2184 case bp_longjmp_resume:
2185 case bp_step_resume:
2186 case bp_through_sigtramp:
2188 case bp_watchpoint_scope:
2193 if (addressprint || b->source_file == NULL)
2195 printf_filtered (" at ");
2196 print_address_numeric (b->address, 1, gdb_stdout);
2199 printf_filtered (": file %s, line %d.",
2200 b->source_file, b->line_number);
2202 printf_filtered ("\n");
2206 /* Nobody calls this currently. */
2207 /* Set a breakpoint from a symtab and line.
2208 If TEMPFLAG is nonzero, it is a temporary breakpoint.
2209 ADDR_STRING is a malloc'd string holding the name of where we are
2210 setting the breakpoint. This is used later to re-set it after the
2211 program is relinked and symbols are reloaded.
2212 Print the same confirmation messages that the breakpoint command prints. */
2215 set_breakpoint (s, line, tempflag, addr_string)
2221 register struct breakpoint *b;
2222 struct symtab_and_line sal;
2227 resolve_sal_pc (&sal); /* Might error out */
2228 describe_other_breakpoints (sal.pc);
2230 b = set_raw_breakpoint (sal);
2231 set_breakpoint_count (breakpoint_count + 1);
2232 b->number = breakpoint_count;
2233 b->type = bp_breakpoint;
2235 b->addr_string = addr_string;
2236 b->enable = enabled;
2237 b->disposition = tempflag ? delete : donttouch;
2243 /* Set a breakpoint according to ARG (function, linenum or *address)
2244 flag: first bit : 0 non-temporary, 1 temporary.
2245 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
2248 break_command_1 (arg, flag, from_tty)
2252 int tempflag, hardwareflag;
2253 struct symtabs_and_lines sals;
2254 struct symtab_and_line sal;
2255 register struct expression *cond = 0;
2256 register struct breakpoint *b;
2258 /* Pointers in arg to the start, and one past the end, of the condition. */
2259 char *cond_start = NULL;
2260 char *cond_end = NULL;
2261 /* Pointers in arg to the start, and one past the end,
2262 of the address part. */
2263 char *addr_start = NULL;
2264 char *addr_end = NULL;
2265 struct cleanup *old_chain;
2266 struct cleanup *canonical_strings_chain = NULL;
2267 char **canonical = (char **)NULL;
2271 hardwareflag = flag & 2;
2272 tempflag = flag & 1;
2277 sal.line = sal.pc = sal.end = 0;
2280 /* If no arg given, or if first arg is 'if ', use the default breakpoint. */
2282 if (!arg || (arg[0] == 'i' && arg[1] == 'f'
2283 && (arg[2] == ' ' || arg[2] == '\t')))
2285 if (default_breakpoint_valid)
2287 sals.sals = (struct symtab_and_line *)
2288 xmalloc (sizeof (struct symtab_and_line));
2289 sal.pc = default_breakpoint_address;
2290 sal.line = default_breakpoint_line;
2291 sal.symtab = default_breakpoint_symtab;
2296 error ("No default breakpoint address now.");
2302 /* Force almost all breakpoints to be in terms of the
2303 current_source_symtab (which is decode_line_1's default). This
2304 should produce the results we want almost all of the time while
2305 leaving default_breakpoint_* alone. */
2306 if (default_breakpoint_valid
2307 && (!current_source_symtab
2308 || (arg && (*arg == '+' || *arg == '-'))))
2309 sals = decode_line_1 (&arg, 1, default_breakpoint_symtab,
2310 default_breakpoint_line, &canonical);
2312 sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0, &canonical);
2320 /* Make sure that all storage allocated in decode_line_1 gets freed in case
2321 the following `for' loop errors out. */
2322 old_chain = make_cleanup (free, sals.sals);
2323 if (canonical != (char **)NULL)
2325 make_cleanup (free, canonical);
2326 canonical_strings_chain = make_cleanup (null_cleanup, 0);
2327 for (i = 0; i < sals.nelts; i++)
2329 if (canonical[i] != NULL)
2330 make_cleanup (free, canonical[i]);
2334 thread = -1; /* No specific thread yet */
2336 /* Resolve all line numbers to PC's, and verify that conditions
2337 can be parsed, before setting any breakpoints. */
2338 for (i = 0; i < sals.nelts; i++)
2340 char *tok, *end_tok;
2343 resolve_sal_pc (&sals.sals[i]);
2349 while (*tok == ' ' || *tok == '\t')
2354 while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
2357 toklen = end_tok - tok;
2359 if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
2361 tok = cond_start = end_tok + 1;
2362 cond = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0);
2365 else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0)
2371 thread = strtol (tok, &tok, 0);
2373 error ("Junk after thread keyword.");
2374 if (!valid_thread_id (thread))
2375 error ("Unknown thread %d\n", thread);
2378 error ("Junk at end of arguments.");
2383 int i, target_resources_ok;
2385 i = hw_breakpoint_used_count ();
2386 target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT (
2387 bp_hardware_breakpoint, i + sals.nelts, 0);
2388 if (target_resources_ok == 0)
2389 error ("No hardware breakpoint support in the target.");
2390 else if (target_resources_ok < 0)
2391 error ("Hardware breakpoints used exceeds limit.");
2394 /* Remove the canonical strings from the cleanup, they are needed below. */
2395 if (canonical != (char **)NULL)
2396 discard_cleanups (canonical_strings_chain);
2398 /* Now set all the breakpoints. */
2399 for (i = 0; i < sals.nelts; i++)
2404 describe_other_breakpoints (sal.pc);
2406 b = set_raw_breakpoint (sal);
2407 set_breakpoint_count (breakpoint_count + 1);
2408 b->number = breakpoint_count;
2409 b->type = hardwareflag ? bp_hardware_breakpoint : bp_breakpoint;
2413 /* If a canonical line spec is needed use that instead of the
2415 if (canonical != (char **)NULL && canonical[i] != NULL)
2416 b->addr_string = canonical[i];
2417 else if (addr_start)
2418 b->addr_string = savestring (addr_start, addr_end - addr_start);
2420 b->cond_string = savestring (cond_start, cond_end - cond_start);
2422 b->enable = enabled;
2423 b->disposition = tempflag ? delete : donttouch;
2430 printf_filtered ("Multiple breakpoints were set.\n");
2431 printf_filtered ("Use the \"delete\" command to delete unwanted breakpoints.\n");
2433 do_cleanups (old_chain);
2436 /* Helper function for break_command_1 and disassemble_command. */
2439 resolve_sal_pc (sal)
2440 struct symtab_and_line *sal;
2444 if (sal->pc == 0 && sal->symtab != 0)
2446 pc = find_line_pc (sal->symtab, sal->line);
2448 error ("No line %d in file \"%s\".",
2449 sal->line, sal->symtab->filename);
2454 #define BP_TEMPFLAG 1
2455 #define BP_HARDWAREFLAG 2
2457 break_command (arg, from_tty)
2461 break_command_1 (arg, 0, from_tty);
2465 tbreak_command (arg, from_tty)
2469 break_command_1 (arg, BP_TEMPFLAG, from_tty);
2473 hbreak_command (arg, from_tty)
2477 break_command_1 (arg, BP_HARDWAREFLAG, from_tty);
2481 thbreak_command (arg, from_tty)
2485 break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty);
2489 /* accessflag: 0: watch write, 1: watch read, 2: watch access(read or write)
2492 watch_command_1 (arg, accessflag, from_tty)
2497 struct breakpoint *b;
2498 struct symtab_and_line sal;
2499 struct expression *exp;
2500 struct block *exp_valid_block;
2501 struct value *val, *mark;
2502 FRAME frame, prev_frame;
2503 char *exp_start = NULL;
2504 char *exp_end = NULL;
2505 char *tok, *end_tok;
2507 char *cond_start = NULL;
2508 char *cond_end = NULL;
2509 struct expression *cond = NULL;
2510 int i, other_type_used, target_resources_ok;
2511 enum bptype bp_type;
2518 /* Parse arguments. */
2519 innermost_block = NULL;
2521 exp = parse_exp_1 (&arg, 0, 0);
2523 exp_valid_block = innermost_block;
2524 mark = value_mark ();
2525 val = evaluate_expression (exp);
2526 release_value (val);
2527 if (VALUE_LAZY (val))
2528 value_fetch_lazy (val);
2531 while (*tok == ' ' || *tok == '\t')
2535 while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
2538 toklen = end_tok - tok;
2539 if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
2541 tok = cond_start = end_tok + 1;
2542 cond = parse_exp_1 (&tok, 0, 0);
2546 error("Junk at end of command.");
2548 if (accessflag == 1) bp_type = bp_read_watchpoint;
2549 else if (accessflag == 2) bp_type = bp_access_watchpoint;
2550 else bp_type = bp_hardware_watchpoint;
2552 mem_cnt = can_use_hardware_watchpoint (val);
2553 if (mem_cnt == 0 && bp_type != bp_hardware_watchpoint)
2554 error ("Expression cannot be implemented with read/access watchpoint.");
2556 i = hw_watchpoint_used_count (bp_type, &other_type_used);
2557 target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT(
2558 bp_type, i + mem_cnt, other_type_used);
2559 if (target_resources_ok == 0 && bp_type != bp_hardware_watchpoint)
2560 error ("Target does not have this type of hardware watchpoint support.");
2561 if (target_resources_ok < 0 && bp_type != bp_hardware_watchpoint)
2562 error ("Target resources have been allocated for other types of watchpoints.");
2565 /* Now set up the breakpoint. */
2566 b = set_raw_breakpoint (sal);
2567 set_breakpoint_count (breakpoint_count + 1);
2568 b->number = breakpoint_count;
2569 b->disposition = donttouch;
2571 b->exp_valid_block = exp_valid_block;
2572 b->exp_string = savestring (exp_start, exp_end - exp_start);
2576 b->cond_string = savestring (cond_start, cond_end - cond_start);
2580 frame = block_innermost_frame (exp_valid_block);
2583 prev_frame = get_prev_frame (frame);
2584 b->watchpoint_frame = FRAME_FP (frame);
2587 b->watchpoint_frame = (CORE_ADDR)0;
2589 if (mem_cnt && target_resources_ok > 0)
2592 b->type = bp_watchpoint;
2594 /* If the expression is "local", then set up a "watchpoint scope"
2595 breakpoint at the point where we've left the scope of the watchpoint
2597 if (innermost_block)
2599 struct breakpoint *scope_breakpoint;
2600 struct symtab_and_line scope_sal;
2604 scope_sal.pc = get_frame_pc (prev_frame);
2605 scope_sal.symtab = NULL;
2608 scope_breakpoint = set_raw_breakpoint (scope_sal);
2609 set_breakpoint_count (breakpoint_count + 1);
2610 scope_breakpoint->number = breakpoint_count;
2612 scope_breakpoint->type = bp_watchpoint_scope;
2613 scope_breakpoint->enable = enabled;
2615 /* Automatically delete the breakpoint when it hits. */
2616 scope_breakpoint->disposition = delete;
2618 /* Only break in the proper frame (help with recursion). */
2619 scope_breakpoint->frame = prev_frame->frame;
2621 /* Set the address at which we will stop. */
2622 scope_breakpoint->address = get_frame_pc (prev_frame);
2624 /* The scope breakpoint is related to the watchpoint. We
2625 will need to act on them together. */
2626 b->related_breakpoint = scope_breakpoint;
2629 value_free_to_mark (mark);
2633 /* Return count of locations need to be watched and can be handled
2634 in hardware. If the watchpoint can not be handled
2635 in hardware return zero. */
2638 can_use_hardware_watchpoint (v)
2641 int found_memory_cnt = 0;
2643 /* Make sure all the intermediate values are in memory. Also make sure
2644 we found at least one memory expression. Guards against watch 0x12345,
2645 which is meaningless, but could cause errors if one tries to insert a
2646 hardware watchpoint for the constant expression. */
2647 for ( ; v; v = v->next)
2649 if (v->lval == lval_memory)
2651 if (TYPE_LENGTH (VALUE_TYPE (v)) <= REGISTER_SIZE)
2654 else if (v->lval != not_lval && v->modifiable == 0)
2658 /* The expression itself looks suitable for using a hardware
2659 watchpoint, but give the target machine a chance to reject it. */
2660 return found_memory_cnt;
2663 static void watch_command (arg, from_tty)
2667 watch_command_1 (arg, 0, from_tty);
2670 static void rwatch_command (arg, from_tty)
2674 watch_command_1 (arg, 1, from_tty);
2677 static void awatch_command (arg, from_tty)
2681 watch_command_1 (arg, 2, from_tty);
2686 * Helper routine for the until_command routine in infcmd.c. Here
2687 * because it uses the mechanisms of breakpoints.
2691 until_break_command (arg, from_tty)
2695 struct symtabs_and_lines sals;
2696 struct symtab_and_line sal;
2697 FRAME prev_frame = get_prev_frame (selected_frame);
2698 struct breakpoint *breakpoint;
2699 struct cleanup *old_chain;
2701 clear_proceed_status ();
2703 /* Set a breakpoint where the user wants it and at return from
2706 if (default_breakpoint_valid)
2707 sals = decode_line_1 (&arg, 1, default_breakpoint_symtab,
2708 default_breakpoint_line, (char ***)NULL);
2710 sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0, (char ***)NULL);
2712 if (sals.nelts != 1)
2713 error ("Couldn't get information on specified line.");
2716 free ((PTR)sals.sals); /* malloc'd, so freed */
2719 error ("Junk at end of arguments.");
2721 resolve_sal_pc (&sal);
2723 breakpoint = set_momentary_breakpoint (sal, selected_frame, bp_until);
2725 old_chain = make_cleanup(delete_breakpoint, breakpoint);
2727 /* Keep within the current frame */
2731 struct frame_info *fi;
2733 fi = get_frame_info (prev_frame);
2734 sal = find_pc_line (fi->pc, 0);
2736 breakpoint = set_momentary_breakpoint (sal, prev_frame, bp_until);
2737 make_cleanup(delete_breakpoint, breakpoint);
2740 proceed (-1, TARGET_SIGNAL_DEFAULT, 0);
2741 do_cleanups(old_chain);
2745 /* These aren't used; I don't konw what they were for. */
2746 /* Set a breakpoint at the catch clause for NAME. */
2748 catch_breakpoint (name)
2754 disable_catch_breakpoint ()
2759 delete_catch_breakpoint ()
2764 enable_catch_breakpoint ()
2771 struct sal_chain *next;
2772 struct symtab_and_line sal;
2776 /* This isn't used; I don't know what it was for. */
2777 /* For each catch clause identified in ARGS, run FUNCTION
2778 with that clause as an argument. */
2779 static struct symtabs_and_lines
2780 map_catch_names (args, function)
2784 register char *p = args;
2786 struct symtabs_and_lines sals;
2788 struct sal_chain *sal_chain = 0;
2792 error_no_arg ("one or more catch names");
2800 /* Don't swallow conditional part. */
2801 if (p1[0] == 'i' && p1[1] == 'f'
2802 && (p1[2] == ' ' || p1[2] == '\t'))
2808 while (isalnum (*p1) || *p1 == '_' || *p1 == '$')
2812 if (*p1 && *p1 != ' ' && *p1 != '\t')
2813 error ("Arguments must be catch names.");
2819 struct sal_chain *next
2820 = (struct sal_chain *)alloca (sizeof (struct sal_chain));
2821 next->next = sal_chain;
2822 next->sal = get_catch_sal (p);
2827 printf_unfiltered ("No catch clause for exception %s.\n", p);
2832 while (*p == ' ' || *p == '\t') p++;
2837 /* This shares a lot of code with `print_frame_label_vars' from stack.c. */
2839 static struct symtabs_and_lines
2840 get_catch_sals (this_level_only)
2841 int this_level_only;
2843 register struct blockvector *bl;
2844 register struct block *block;
2845 int index, have_default = 0;
2846 struct frame_info *fi;
2848 struct symtabs_and_lines sals;
2849 struct sal_chain *sal_chain = 0;
2850 char *blocks_searched;
2852 /* Not sure whether an error message is always the correct response,
2853 but it's better than a core dump. */
2854 if (selected_frame == NULL)
2855 error ("No selected frame.");
2856 block = get_frame_block (selected_frame);
2857 fi = get_frame_info (selected_frame);
2864 error ("No symbol table info available.\n");
2866 bl = blockvector_for_pc (BLOCK_END (block) - 4, &index);
2867 blocks_searched = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
2868 memset (blocks_searched, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
2872 CORE_ADDR end = BLOCK_END (block) - 4;
2875 if (bl != blockvector_for_pc (end, &index))
2876 error ("blockvector blotch");
2877 if (BLOCKVECTOR_BLOCK (bl, index) != block)
2878 error ("blockvector botch");
2879 last_index = BLOCKVECTOR_NBLOCKS (bl);
2882 /* Don't print out blocks that have gone by. */
2883 while (index < last_index
2884 && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc)
2887 while (index < last_index
2888 && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end)
2890 if (blocks_searched[index] == 0)
2892 struct block *b = BLOCKVECTOR_BLOCK (bl, index);
2895 register struct symbol *sym;
2897 nsyms = BLOCK_NSYMS (b);
2899 for (i = 0; i < nsyms; i++)
2901 sym = BLOCK_SYM (b, i);
2902 if (STREQ (SYMBOL_NAME (sym), "default"))
2908 if (SYMBOL_CLASS (sym) == LOC_LABEL)
2910 struct sal_chain *next = (struct sal_chain *)
2911 alloca (sizeof (struct sal_chain));
2912 next->next = sal_chain;
2913 next->sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0);
2917 blocks_searched[index] = 1;
2923 if (sal_chain && this_level_only)
2926 /* After handling the function's top-level block, stop.
2927 Don't continue to its superblock, the block of
2928 per-file symbols. */
2929 if (BLOCK_FUNCTION (block))
2931 block = BLOCK_SUPERBLOCK (block);
2936 struct sal_chain *tmp_chain;
2938 /* Count the number of entries. */
2939 for (index = 0, tmp_chain = sal_chain; tmp_chain;
2940 tmp_chain = tmp_chain->next)
2944 sals.sals = (struct symtab_and_line *)
2945 xmalloc (index * sizeof (struct symtab_and_line));
2946 for (index = 0; sal_chain; sal_chain = sal_chain->next, index++)
2947 sals.sals[index] = sal_chain->sal;
2953 /* Commands to deal with catching exceptions. */
2956 catch_command_1 (arg, tempflag, from_tty)
2961 /* First, translate ARG into something we can deal with in terms
2964 struct symtabs_and_lines sals;
2965 struct symtab_and_line sal;
2966 register struct expression *cond = 0;
2967 register struct breakpoint *b;
2971 sal.line = sal.pc = sal.end = 0;
2974 /* If no arg given, or if first arg is 'if ', all active catch clauses
2975 are breakpointed. */
2977 if (!arg || (arg[0] == 'i' && arg[1] == 'f'
2978 && (arg[2] == ' ' || arg[2] == '\t')))
2980 /* Grab all active catch clauses. */
2981 sals = get_catch_sals (0);
2985 /* Grab selected catch clauses. */
2986 error ("catch NAME not implemented");
2988 /* This isn't used; I don't know what it was for. */
2989 sals = map_catch_names (arg, catch_breakpoint);
2997 for (i = 0; i < sals.nelts; i++)
2999 resolve_sal_pc (&sals.sals[i]);
3003 if (arg[0] == 'i' && arg[1] == 'f'
3004 && (arg[2] == ' ' || arg[2] == '\t'))
3005 cond = parse_exp_1 ((arg += 2, &arg),
3006 block_for_pc (sals.sals[i].pc), 0);
3008 error ("Junk at end of arguments.");
3013 for (i = 0; i < sals.nelts; i++)
3018 describe_other_breakpoints (sal.pc);
3020 b = set_raw_breakpoint (sal);
3021 set_breakpoint_count (breakpoint_count + 1);
3022 b->number = breakpoint_count;
3023 b->type = bp_breakpoint;
3025 b->enable = enabled;
3026 b->disposition = tempflag ? delete : donttouch;
3033 printf_unfiltered ("Multiple breakpoints were set.\n");
3034 printf_unfiltered ("Use the \"delete\" command to delete unwanted breakpoints.\n");
3036 free ((PTR)sals.sals);
3040 /* These aren't used; I don't know what they were for. */
3041 /* Disable breakpoints on all catch clauses described in ARGS. */
3043 disable_catch (args)
3046 /* Map the disable command to catch clauses described in ARGS. */
3049 /* Enable breakpoints on all catch clauses described in ARGS. */
3054 /* Map the disable command to catch clauses described in ARGS. */
3057 /* Delete breakpoints on all catch clauses in the active scope. */
3062 /* Map the delete command to catch clauses described in ARGS. */
3067 catch_command (arg, from_tty)
3071 catch_command_1 (arg, 0, from_tty);
3075 clear_command (arg, from_tty)
3079 register struct breakpoint *b, *b1;
3080 struct symtabs_and_lines sals;
3081 struct symtab_and_line sal;
3082 register struct breakpoint *found;
3087 sals = decode_line_spec (arg, 1);
3091 sals.sals = (struct symtab_and_line *) xmalloc (sizeof (struct symtab_and_line));
3092 sal.line = default_breakpoint_line;
3093 sal.symtab = default_breakpoint_symtab;
3095 if (sal.symtab == 0)
3096 error ("No source file specified.");
3102 for (i = 0; i < sals.nelts; i++)
3104 /* If exact pc given, clear bpts at that pc.
3105 But if sal.pc is zero, clear all bpts on specified line. */
3107 found = (struct breakpoint *) 0;
3108 while (breakpoint_chain
3110 ? breakpoint_chain->address == sal.pc
3111 : (breakpoint_chain->source_file != NULL
3112 && sal.symtab != NULL
3113 && STREQ (breakpoint_chain->source_file,
3114 sal.symtab->filename)
3115 && breakpoint_chain->line_number == sal.line)))
3117 b1 = breakpoint_chain;
3118 breakpoint_chain = b1->next;
3125 && b->next->type != bp_watchpoint
3126 && b->next->type != bp_hardware_watchpoint
3127 && b->next->type != bp_read_watchpoint
3128 && b->next->type != bp_access_watchpoint
3130 ? b->next->address == sal.pc
3131 : (b->next->source_file != NULL
3132 && sal.symtab != NULL
3133 && STREQ (b->next->source_file, sal.symtab->filename)
3134 && b->next->line_number == sal.line)))
3145 error ("No breakpoint at %s.", arg);
3147 error ("No breakpoint at this line.");
3150 if (found->next) from_tty = 1; /* Always report if deleted more than one */
3151 if (from_tty) printf_unfiltered ("Deleted breakpoint%s ", found->next ? "s" : "");
3152 breakpoints_changed ();
3155 if (from_tty) printf_unfiltered ("%d ", found->number);
3157 delete_breakpoint (found);
3160 if (from_tty) putchar_unfiltered ('\n');
3162 free ((PTR)sals.sals);
3165 /* Delete breakpoint in BS if they are `delete' breakpoints.
3166 This is called after any breakpoint is hit, or after errors. */
3169 breakpoint_auto_delete (bs)
3172 for (; bs; bs = bs->next)
3173 if (bs->breakpoint_at && bs->breakpoint_at->disposition == delete
3175 delete_breakpoint (bs->breakpoint_at);
3178 /* Delete a breakpoint and clean up all traces of it in the data structures. */
3181 delete_breakpoint (bpt)
3182 struct breakpoint *bpt;
3184 register struct breakpoint *b;
3187 if (delete_breakpoint_hook)
3188 delete_breakpoint_hook (bpt);
3191 remove_breakpoint (bpt);
3193 if (breakpoint_chain == bpt)
3194 breakpoint_chain = bpt->next;
3199 b->next = bpt->next;
3203 check_duplicates (bpt->address);
3204 /* If this breakpoint was inserted, and there is another breakpoint
3205 at the same address, we need to insert the other breakpoint. */
3207 && bpt->type != bp_hardware_watchpoint
3208 && bpt->type != bp_read_watchpoint
3209 && bpt->type != bp_access_watchpoint)
3212 if (b->address == bpt->address
3214 && b->enable != disabled)
3217 val = target_insert_breakpoint (b->address, b->shadow_contents);
3220 target_terminal_ours_for_output ();
3221 fprintf_unfiltered (gdb_stderr, "Cannot insert breakpoint %d:\n", b->number);
3222 memory_error (val, b->address); /* which bombs us out */
3229 free_command_lines (&bpt->commands);
3232 if (bpt->cond_string != NULL)
3233 free (bpt->cond_string);
3234 if (bpt->addr_string != NULL)
3235 free (bpt->addr_string);
3236 if (bpt->exp_string != NULL)
3237 free (bpt->exp_string);
3238 if (bpt->source_file != NULL)
3239 free (bpt->source_file);
3241 breakpoints_changed ();
3243 /* Be sure no bpstat's are pointing at it after it's been freed. */
3244 /* FIXME, how can we find all bpstat's?
3245 We just check stop_bpstat for now. */
3246 for (bs = stop_bpstat; bs; bs = bs->next)
3247 if (bs->breakpoint_at == bpt)
3248 bs->breakpoint_at = NULL;
3253 delete_command (arg, from_tty)
3260 /* Ask user only if there are some breakpoints to delete. */
3262 || (breakpoint_chain && query ("Delete all breakpoints? ", 0, 0)))
3264 /* No arg; clear all breakpoints. */
3265 while (breakpoint_chain)
3266 delete_breakpoint (breakpoint_chain);
3270 map_breakpoint_numbers (arg, delete_breakpoint);
3273 /* Reset a breakpoint given it's struct breakpoint * BINT.
3274 The value we return ends up being the return value from catch_errors.
3275 Unused in this case. */
3278 breakpoint_re_set_one (bint)
3281 struct breakpoint *b = (struct breakpoint *)bint; /* get past catch_errs */
3284 struct symtabs_and_lines sals;
3286 enum enable save_enable;
3291 case bp_hardware_breakpoint:
3292 if (b->addr_string == NULL)
3294 /* Anything without a string can't be re-set. */
3295 delete_breakpoint (b);
3298 /* In case we have a problem, disable this breakpoint. We'll restore
3299 its status if we succeed. */
3300 save_enable = b->enable;
3301 b->enable = disabled;
3304 sals = decode_line_1 (&s, 1, (struct symtab *)NULL, 0, (char ***)NULL);
3305 for (i = 0; i < sals.nelts; i++)
3307 resolve_sal_pc (&sals.sals[i]);
3309 /* Reparse conditions, they might contain references to the
3311 if (b->cond_string != NULL)
3315 free ((PTR)b->cond);
3316 b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0);
3319 /* We need to re-set the breakpoint if the address changes...*/
3320 if (b->address != sals.sals[i].pc
3321 /* ...or new and old breakpoints both have source files, and
3322 the source file name or the line number changes... */
3323 || (b->source_file != NULL
3324 && sals.sals[i].symtab != NULL
3325 && (!STREQ (b->source_file, sals.sals[i].symtab->filename)
3326 || b->line_number != sals.sals[i].line)
3328 /* ...or we switch between having a source file and not having
3330 || ((b->source_file == NULL) != (sals.sals[i].symtab == NULL))
3333 if (b->source_file != NULL)
3334 free (b->source_file);
3335 if (sals.sals[i].symtab == NULL)
3336 b->source_file = NULL;
3339 savestring (sals.sals[i].symtab->filename,
3340 strlen (sals.sals[i].symtab->filename));
3341 b->line_number = sals.sals[i].line;
3342 b->address = sals.sals[i].pc;
3344 check_duplicates (b->address);
3348 /* Might be better to do this just once per breakpoint_re_set,
3349 rather than once for every breakpoint. */
3350 breakpoints_changed ();
3352 b->enable = save_enable; /* Restore it, this worked. */
3354 free ((PTR)sals.sals);
3358 case bp_hardware_watchpoint:
3359 case bp_read_watchpoint:
3360 case bp_access_watchpoint:
3361 innermost_block = NULL;
3362 /* The issue arises of what context to evaluate this in. The same
3363 one as when it was set, but what does that mean when symbols have
3364 been re-read? We could save the filename and functionname, but
3365 if the context is more local than that, the best we could do would
3366 be something like how many levels deep and which index at that
3367 particular level, but that's going to be less stable than filenames
3368 or functionnames. */
3369 /* So for now, just use a global context. */
3370 b->exp = parse_expression (b->exp_string);
3371 b->exp_valid_block = innermost_block;
3372 mark = value_mark ();
3373 b->val = evaluate_expression (b->exp);
3374 release_value (b->val);
3375 if (VALUE_LAZY (b->val))
3376 value_fetch_lazy (b->val);
3378 if (b->cond_string != NULL)
3381 b->cond = parse_exp_1 (&s, (struct block *)0, 0);
3383 if (b->enable == enabled)
3385 value_free_to_mark (mark);
3389 printf_filtered ("Deleting unknown breakpoint type %d\n", b->type);
3394 case bp_longjmp_resume:
3395 case bp_watchpoint_scope:
3397 delete_breakpoint (b);
3404 /* Re-set all breakpoints after symbols have been re-loaded. */
3406 breakpoint_re_set ()
3408 struct breakpoint *b, *temp;
3409 static char message1[] = "Error in re-setting breakpoint %d:\n";
3410 char message[sizeof (message1) + 30 /* slop */];
3412 ALL_BREAKPOINTS_SAFE (b, temp)
3414 sprintf (message, message1, b->number); /* Format possible error msg */
3415 catch_errors (breakpoint_re_set_one, (char *) b, message,
3419 create_longjmp_breakpoint("longjmp");
3420 create_longjmp_breakpoint("_longjmp");
3421 create_longjmp_breakpoint("siglongjmp");
3422 create_longjmp_breakpoint(NULL);
3425 /* Took this out (temporaliy at least), since it produces an extra
3426 blank line at startup. This messes up the gdbtests. -PB */
3427 /* Blank line to finish off all those mention() messages we just printed. */
3428 printf_filtered ("\n");
3432 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
3433 If from_tty is nonzero, it prints a message to that effect,
3434 which ends with a period (no newline). */
3437 set_ignore_count (bptnum, count, from_tty)
3438 int bptnum, count, from_tty;
3440 register struct breakpoint *b;
3446 if (b->number == bptnum)
3448 b->ignore_count = count;
3451 else if (count == 0)
3452 printf_filtered ("Will stop next time breakpoint %d is reached.",
3454 else if (count == 1)
3455 printf_filtered ("Will ignore next crossing of breakpoint %d.",
3458 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
3460 breakpoints_changed ();
3464 error ("No breakpoint number %d.", bptnum);
3467 /* Clear the ignore counts of all breakpoints. */
3469 breakpoint_clear_ignore_counts ()
3471 struct breakpoint *b;
3474 b->ignore_count = 0;
3477 /* Command to set ignore-count of breakpoint N to COUNT. */
3480 ignore_command (args, from_tty)
3488 error_no_arg ("a breakpoint number");
3490 num = get_number (&p);
3493 error ("Second argument (specified ignore-count) is missing.");
3495 set_ignore_count (num,
3496 longest_to_int (value_as_long (parse_and_eval (p))),
3498 printf_filtered ("\n");
3499 breakpoints_changed ();
3502 /* Call FUNCTION on each of the breakpoints
3503 whose numbers are given in ARGS. */
3506 map_breakpoint_numbers (args, function)
3508 void (*function) PARAMS ((struct breakpoint *));
3510 register char *p = args;
3513 register struct breakpoint *b;
3516 error_no_arg ("one or more breakpoint numbers");
3522 num = get_number (&p1);
3525 if (b->number == num)
3527 struct breakpoint *related_breakpoint = b->related_breakpoint;
3529 if (related_breakpoint)
3530 function (related_breakpoint);
3533 printf_unfiltered ("No breakpoint number %d.\n", num);
3540 enable_breakpoint (bpt)
3541 struct breakpoint *bpt;
3543 FRAME save_selected_frame = NULL;
3544 int save_selected_frame_level = -1;
3545 int target_resources_ok, other_type_used;
3548 if (enable_breakpoint_hook)
3549 enable_breakpoint_hook (bpt);
3551 if (bpt->type == bp_hardware_breakpoint)
3554 i = hw_breakpoint_used_count();
3555 target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT(
3556 bp_hardware_breakpoint, i+1, 0);
3557 if (target_resources_ok == 0)
3558 error ("No hardware breakpoint support in the target.");
3559 else if (target_resources_ok < 0)
3560 error ("Hardware breakpoints used exceeds limit.");
3562 bpt->enable = enabled;
3563 breakpoints_changed ();
3564 check_duplicates (bpt->address);
3566 if (bpt->type == bp_watchpoint || bpt->type == bp_hardware_watchpoint ||
3567 bpt->type == bp_read_watchpoint || bpt->type == bp_access_watchpoint)
3569 if (bpt->exp_valid_block != NULL)
3571 FRAME fr = find_frame_addr_in_frame_chain (bpt->watchpoint_frame);
3575 Cannot enable watchpoint %d because the block in which its expression\n\
3576 is valid is not currently in scope.\n", bpt->number);
3577 bpt->enable = disabled;
3581 save_selected_frame = selected_frame;
3582 save_selected_frame_level = selected_frame_level;
3583 select_frame (fr, -1);
3586 value_free (bpt->val);
3587 mark = value_mark ();
3588 bpt->val = evaluate_expression (bpt->exp);
3589 release_value (bpt->val);
3590 if (VALUE_LAZY (bpt->val))
3591 value_fetch_lazy (bpt->val);
3593 if (bpt->type == bp_hardware_watchpoint ||
3594 bpt->type == bp_read_watchpoint ||
3595 bpt->type == bp_access_watchpoint)
3597 int i = hw_watchpoint_used_count (bpt->type, &other_type_used);
3598 int mem_cnt = can_use_hardware_watchpoint (bpt->val);
3600 target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT(
3601 bpt->type, i + mem_cnt, other_type_used);
3602 /* we can consider of type is bp_hardware_watchpoint, convert to
3603 bp_watchpoint in the following condition */
3604 if (target_resources_ok < 0)
3607 Cannot enable watchpoint %d because target watch resources\n\
3608 have been allocated for other watchpoints.\n", bpt->number);
3609 bpt->enable = disabled;
3610 value_free_to_mark (mark);
3615 if (save_selected_frame_level >= 0)
3616 select_frame (save_selected_frame, save_selected_frame_level);
3617 value_free_to_mark (mark);
3623 enable_command (args, from_tty)
3627 struct breakpoint *bpt;
3629 ALL_BREAKPOINTS (bpt)
3633 case bp_hardware_breakpoint:
3635 case bp_hardware_watchpoint:
3636 case bp_read_watchpoint:
3637 case bp_access_watchpoint:
3638 enable_breakpoint (bpt);
3643 map_breakpoint_numbers (args, enable_breakpoint);
3647 disable_breakpoint (bpt)
3648 struct breakpoint *bpt;
3650 /* Never disable a watchpoint scope breakpoint; we want to
3651 hit them when we leave scope so we can delete both the
3652 watchpoint and its scope breakpoint at that time. */
3653 if (bpt->type == bp_watchpoint_scope)
3656 if (disable_breakpoint_hook)
3657 disable_breakpoint_hook (bpt);
3659 bpt->enable = disabled;
3661 breakpoints_changed ();
3663 check_duplicates (bpt->address);
3668 disable_command (args, from_tty)
3672 register struct breakpoint *bpt;
3674 ALL_BREAKPOINTS (bpt)
3678 case bp_hardware_breakpoint:
3680 case bp_hardware_watchpoint:
3681 case bp_read_watchpoint:
3682 case bp_access_watchpoint:
3683 disable_breakpoint (bpt);
3688 map_breakpoint_numbers (args, disable_breakpoint);
3692 enable_once_breakpoint (bpt)
3693 struct breakpoint *bpt;
3695 FRAME save_selected_frame = NULL;
3696 int save_selected_frame_level = -1;
3697 int target_resources_ok, other_type_used;
3700 if (bpt->type == bp_hardware_breakpoint)
3703 i = hw_breakpoint_used_count();
3704 target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT(
3705 bp_hardware_breakpoint, i+1, 0);
3706 if (target_resources_ok == 0)
3707 error ("No hardware breakpoint support in the target.");
3708 else if (target_resources_ok < 0)
3709 error ("Hardware breakpoints used exceeds limit.");
3712 bpt->enable = enabled;
3713 bpt->disposition = disable;
3714 check_duplicates (bpt->address);
3715 breakpoints_changed ();
3717 if (bpt->type == bp_watchpoint || bpt->type == bp_hardware_watchpoint ||
3718 bpt->type == bp_read_watchpoint || bpt->type == bp_access_watchpoint)
3720 if (bpt->exp_valid_block != NULL)
3722 FRAME fr = find_frame_addr_in_frame_chain (bpt->watchpoint_frame);
3726 Cannot enable watchpoint %d because the block in which its expression\n\
3727 is valid is not currently in scope.\n", bpt->number);
3728 bpt->enable = disabled;
3732 save_selected_frame = selected_frame;
3733 save_selected_frame_level = selected_frame_level;
3734 select_frame (fr, -1);
3737 value_free (bpt->val);
3738 mark = value_mark ();
3739 bpt->val = evaluate_expression (bpt->exp);
3740 release_value (bpt->val);
3741 if (VALUE_LAZY (bpt->val))
3742 value_fetch_lazy (bpt->val);
3744 if (bpt->type == bp_hardware_watchpoint ||
3745 bpt->type == bp_read_watchpoint ||
3746 bpt->type == bp_access_watchpoint)
3748 int i = hw_watchpoint_used_count (bpt->type, &other_type_used);
3749 int mem_cnt = can_use_hardware_watchpoint(bpt->val);
3750 target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT(
3751 bpt->type, i+mem_cnt, other_type_used);
3752 /* we can consider of type is bp_hardware_watchpoint, convert to
3753 bp_watchpoint in the following condition */
3754 if (target_resources_ok < 0)
3757 Cannot enable watchpoint %d because target watch resources\n\
3758 have been allocated for other watchpoints.\n", bpt->number);
3759 bpt->enable = disabled;
3760 value_free_to_mark (mark);
3764 if (save_selected_frame_level >= 0)
3765 select_frame (save_selected_frame, save_selected_frame_level);
3766 value_free_to_mark (mark);
3772 enable_once_command (args, from_tty)
3776 map_breakpoint_numbers (args, enable_once_breakpoint);
3780 enable_delete_breakpoint (bpt)
3781 struct breakpoint *bpt;
3783 bpt->enable = enabled;
3784 bpt->disposition = delete;
3786 check_duplicates (bpt->address);
3787 breakpoints_changed ();
3792 enable_delete_command (args, from_tty)
3796 map_breakpoint_numbers (args, enable_delete_breakpoint);
3800 * Use default_breakpoint_'s, or nothing if they aren't valid.
3802 struct symtabs_and_lines
3803 decode_line_spec_1 (string, funfirstline)
3807 struct symtabs_and_lines sals;
3809 error ("Empty line specification.");
3810 if (default_breakpoint_valid)
3811 sals = decode_line_1 (&string, funfirstline,
3812 default_breakpoint_symtab, default_breakpoint_line,
3815 sals = decode_line_1 (&string, funfirstline,
3816 (struct symtab *)NULL, 0, (char ***)NULL);
3818 error ("Junk at end of line specification: %s", string);
3823 _initialize_breakpoint ()
3825 breakpoint_chain = 0;
3826 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
3827 before a breakpoint is set. */
3828 breakpoint_count = 0;
3830 add_com ("ignore", class_breakpoint, ignore_command,
3831 "Set ignore-count of breakpoint number N to COUNT.\n\
3832 Usage is `ignore N COUNT'.");
3834 add_com ("commands", class_breakpoint, commands_command,
3835 "Set commands to be executed when a breakpoint is hit.\n\
3836 Give breakpoint number as argument after \"commands\".\n\
3837 With no argument, the targeted breakpoint is the last one set.\n\
3838 The commands themselves follow starting on the next line.\n\
3839 Type a line containing \"end\" to indicate the end of them.\n\
3840 Give \"silent\" as the first line to make the breakpoint silent;\n\
3841 then no output is printed when it is hit, except what the commands print.");
3843 add_com ("condition", class_breakpoint, condition_command,
3844 "Specify breakpoint number N to break only if COND is true.\n\
3845 Usage is `condition N COND', where N is an integer and COND is an\n\
3846 expression to be evaluated whenever breakpoint N is reached. ");
3848 add_com ("tbreak", class_breakpoint, tbreak_command,
3849 "Set a temporary breakpoint. Args like \"break\" command.\n\
3850 Like \"break\" except the breakpoint is only temporary,\n\
3851 so it will be deleted when hit. Equivalent to \"break\" followed\n\
3852 by using \"enable delete\" on the breakpoint number.");
3854 add_com ("hbreak", class_breakpoint, hbreak_command,
3855 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
3856 Like \"break\" except the breakpoint requires hardware support,\n\
3857 some target hardware may not have this support.");
3859 add_com ("thbreak", class_breakpoint, thbreak_command,
3860 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
3861 Like \"hbreak\" except the breakpoint is only temporary,\n\
3862 so it will be deleted when hit.");
3864 add_prefix_cmd ("enable", class_breakpoint, enable_command,
3865 "Enable some breakpoints.\n\
3866 Give breakpoint numbers (separated by spaces) as arguments.\n\
3867 With no subcommand, breakpoints are enabled until you command otherwise.\n\
3868 This is used to cancel the effect of the \"disable\" command.\n\
3869 With a subcommand you can enable temporarily.",
3870 &enablelist, "enable ", 1, &cmdlist);
3872 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command,
3873 "Enable some breakpoints.\n\
3874 Give breakpoint numbers (separated by spaces) as arguments.\n\
3875 This is used to cancel the effect of the \"disable\" command.\n\
3876 May be abbreviated to simply \"enable\".\n",
3877 &enablebreaklist, "enable breakpoints ", 1, &enablelist);
3879 add_cmd ("once", no_class, enable_once_command,
3880 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
3881 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
3884 add_cmd ("delete", no_class, enable_delete_command,
3885 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
3886 If a breakpoint is hit while enabled in this fashion, it is deleted.",
3889 add_cmd ("delete", no_class, enable_delete_command,
3890 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
3891 If a breakpoint is hit while enabled in this fashion, it is deleted.",
3894 add_cmd ("once", no_class, enable_once_command,
3895 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
3896 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
3899 add_prefix_cmd ("disable", class_breakpoint, disable_command,
3900 "Disable some breakpoints.\n\
3901 Arguments are breakpoint numbers with spaces in between.\n\
3902 To disable all breakpoints, give no argument.\n\
3903 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
3904 &disablelist, "disable ", 1, &cmdlist);
3905 add_com_alias ("dis", "disable", class_breakpoint, 1);
3906 add_com_alias ("disa", "disable", class_breakpoint, 1);
3908 add_cmd ("breakpoints", class_alias, disable_command,
3909 "Disable some breakpoints.\n\
3910 Arguments are breakpoint numbers with spaces in between.\n\
3911 To disable all breakpoints, give no argument.\n\
3912 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
3913 This command may be abbreviated \"disable\".",
3916 add_prefix_cmd ("delete", class_breakpoint, delete_command,
3917 "Delete some breakpoints or auto-display expressions.\n\
3918 Arguments are breakpoint numbers with spaces in between.\n\
3919 To delete all breakpoints, give no argument.\n\
3921 Also a prefix command for deletion of other GDB objects.\n\
3922 The \"unset\" command is also an alias for \"delete\".",
3923 &deletelist, "delete ", 1, &cmdlist);
3924 add_com_alias ("d", "delete", class_breakpoint, 1);
3926 add_cmd ("breakpoints", class_alias, delete_command,
3927 "Delete some breakpoints or auto-display expressions.\n\
3928 Arguments are breakpoint numbers with spaces in between.\n\
3929 To delete all breakpoints, give no argument.\n\
3930 This command may be abbreviated \"delete\".",
3933 add_com ("clear", class_breakpoint, clear_command,
3934 "Clear breakpoint at specified line or function.\n\
3935 Argument may be line number, function name, or \"*\" and an address.\n\
3936 If line number is specified, all breakpoints in that line are cleared.\n\
3937 If function is specified, breakpoints at beginning of function are cleared.\n\
3938 If an address is specified, breakpoints at that address are cleared.\n\n\
3939 With no argument, clears all breakpoints in the line that the selected frame\n\
3942 See also the \"delete\" command which clears breakpoints by number.");
3944 add_com ("break", class_breakpoint, break_command,
3945 "Set breakpoint at specified line or function.\n\
3946 Argument may be line number, function name, or \"*\" and an address.\n\
3947 If line number is specified, break at start of code for that line.\n\
3948 If function is specified, break at start of code for that function.\n\
3949 If an address is specified, break at that exact address.\n\
3950 With no arg, uses current execution address of selected stack frame.\n\
3951 This is useful for breaking on return to a stack frame.\n\
3953 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
3955 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
3956 add_com_alias ("b", "break", class_run, 1);
3957 add_com_alias ("br", "break", class_run, 1);
3958 add_com_alias ("bre", "break", class_run, 1);
3959 add_com_alias ("brea", "break", class_run, 1);
3961 add_info ("breakpoints", breakpoints_info,
3962 "Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
3963 The \"Type\" column indicates one of:\n\
3964 \tbreakpoint - normal breakpoint\n\
3965 \twatchpoint - watchpoint\n\
3966 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
3967 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
3968 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
3969 address and file/line number respectively.\n\n\
3970 Convenience variable \"$_\" and default examine address for \"x\"\n\
3971 are set to the address of the last breakpoint listed.\n\n\
3972 Convenience variable \"$bpnum\" contains the number of the last\n\
3975 #if MAINTENANCE_CMDS
3977 add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints,
3978 "Status of all breakpoints, or breakpoint number NUMBER.\n\
3979 The \"Type\" column indicates one of:\n\
3980 \tbreakpoint - normal breakpoint\n\
3981 \twatchpoint - watchpoint\n\
3982 \tlongjmp - internal breakpoint used to step through longjmp()\n\
3983 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
3984 \tuntil - internal breakpoint used by the \"until\" command\n\
3985 \tfinish - internal breakpoint used by the \"finish\" command\n\
3986 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
3987 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
3988 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
3989 address and file/line number respectively.\n\n\
3990 Convenience variable \"$_\" and default examine address for \"x\"\n\
3991 are set to the address of the last breakpoint listed.\n\n\
3992 Convenience variable \"$bpnum\" contains the number of the last\n\
3994 &maintenanceinfolist);
3996 #endif /* MAINTENANCE_CMDS */
3998 add_com ("catch", class_breakpoint, catch_command,
3999 "Set breakpoints to catch exceptions that are raised.\n\
4000 Argument may be a single exception to catch, multiple exceptions\n\
4001 to catch, or the default exception \"default\". If no arguments\n\
4002 are given, breakpoints are set at all exception handlers catch clauses\n\
4003 within the current scope.\n\
4005 A condition specified for the catch applies to all breakpoints set\n\
4006 with this command\n\
4008 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
4010 add_com ("watch", class_breakpoint, watch_command,
4011 "Set a watchpoint for an expression.\n\
4012 A watchpoint stops execution of your program whenever the value of\n\
4013 an expression changes.");
4015 add_com ("rwatch", class_breakpoint, rwatch_command,
4016 "Set a read watchpoint for an expression.\n\
4017 A watchpoint stops execution of your program whenever the value of\n\
4018 an expression is read.");
4020 add_com ("awatch", class_breakpoint, awatch_command,
4021 "Set a watchpoint for an expression.\n\
4022 A watchpoint stops execution of your program whenever the value of\n\
4023 an expression is either read or written.");
4025 add_info ("watchpoints", breakpoints_info,
4026 "Synonym for ``info breakpoints''.");
4030 /* OK, when we call objfile_relocate, we need to relocate breakpoints
4031 too. breakpoint_re_set is not a good choice--for example, if
4032 addr_string contains just a line number without a file name the
4033 breakpoint might get set in a different file. In general, there is
4034 no need to go all the way back to the user's string (though this might
4035 work if some effort were made to canonicalize it), since symtabs and
4036 everything except addresses are still valid.
4038 Probably the best way to solve this is to have each breakpoint save
4039 the objfile and the section number that was used to set it (if set
4040 by "*addr", probably it is best to use find_pc_line to get a symtab
4041 and use the objfile and block_line_section for that symtab). Then
4042 objfile_relocate can call fixup_breakpoints with the objfile and
4043 the new_offsets, and it can relocate only the appropriate breakpoints. */
4045 #ifdef IBM6000_TARGET
4046 /* But for now, just kludge it based on the concept that before an
4047 objfile is relocated the breakpoint is below 0x10000000, and afterwards
4048 it is higher, so that way we only relocate each breakpoint once. */
4051 fixup_breakpoints (low, high, delta)
4056 struct breakpoint *b;
4060 if (b->address >= low && b->address <= high)
4061 b->address += delta;