1 /* Everything about breakpoints, for GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001 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., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
26 #include "breakpoint.h"
28 #include "expression.h"
34 #include "gdbthread.h"
37 #include "gdb_string.h"
47 #include "gdb-events.h"
49 /* Prototypes for local functions. */
51 static void until_break_command_continuation (struct continuation_arg *arg);
53 static void catch_command_1 (char *, int, int);
55 static void enable_delete_command (char *, int);
57 static void enable_delete_breakpoint (struct breakpoint *);
59 static void enable_once_command (char *, int);
61 static void enable_once_breakpoint (struct breakpoint *);
63 static void disable_command (char *, int);
65 static void enable_command (char *, int);
67 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint *));
69 static void ignore_command (char *, int);
71 static int breakpoint_re_set_one (PTR);
73 static void clear_command (char *, int);
75 static void catch_command (char *, int);
77 static void handle_gnu_4_16_catch_command (char *, int, int);
79 static struct symtabs_and_lines get_catch_sals (int);
81 static void watch_command (char *, int);
83 static int can_use_hardware_watchpoint (struct value *);
85 static void break_at_finish_command (char *, int);
86 static void break_at_finish_at_depth_command (char *, int);
88 static void tbreak_at_finish_command (char *, int);
90 static void break_command_1 (char *, int, int);
92 static void mention (struct breakpoint *);
94 struct breakpoint *set_raw_breakpoint (struct symtab_and_line);
96 static void check_duplicates (CORE_ADDR, asection *);
98 static void describe_other_breakpoints (CORE_ADDR, asection *);
100 static void breakpoints_info (char *, int);
102 static void breakpoint_1 (int, int);
104 static bpstat bpstat_alloc (struct breakpoint *, bpstat);
106 static int breakpoint_cond_eval (PTR);
108 static void cleanup_executing_breakpoints (PTR);
110 static void commands_command (char *, int);
112 static void condition_command (char *, int);
114 static int get_number_trailer (char **, int);
116 void set_breakpoint_count (int);
119 static struct breakpoint *create_temp_exception_breakpoint (CORE_ADDR);
129 static int remove_breakpoint (struct breakpoint *, insertion_state_t);
131 static enum print_stop_action print_it_typical (bpstat);
133 static enum print_stop_action print_bp_stop_message (bpstat bs);
137 enum exception_event_kind kind;
140 args_for_catchpoint_enable;
142 static int watchpoint_check (PTR);
144 static int cover_target_enable_exception_callback (PTR);
146 static void maintenance_info_breakpoints (char *, int);
148 #ifdef GET_LONGJMP_TARGET
149 static void create_longjmp_breakpoint (char *);
152 static int hw_breakpoint_used_count (void);
154 static int hw_watchpoint_used_count (enum bptype, int *);
156 static void hbreak_command (char *, int);
158 static void thbreak_command (char *, int);
160 static void watch_command_1 (char *, int, int);
162 static void rwatch_command (char *, int);
164 static void awatch_command (char *, int);
166 static void do_enable_breakpoint (struct breakpoint *, enum bpdisp);
168 static void solib_load_unload_1 (char *hookname,
171 char *cond_string, enum bptype bp_kind);
173 static void create_fork_vfork_event_catchpoint (int tempflag,
175 enum bptype bp_kind);
177 static void break_at_finish_at_depth_command_1 (char *arg,
178 int flag, int from_tty);
180 static void break_at_finish_command_1 (char *arg, int flag, int from_tty);
182 static void stop_command (char *arg, int from_tty);
184 static void stopin_command (char *arg, int from_tty);
186 static void stopat_command (char *arg, int from_tty);
188 static char *ep_find_event_name_end (char *arg);
190 static char *ep_parse_optional_if_clause (char **arg);
192 static char *ep_parse_optional_filename (char **arg);
194 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
195 static void catch_exec_command_1 (char *arg, int tempflag, int from_tty);
198 static void create_exception_catchpoint (int tempflag, char *cond_string,
199 enum exception_event_kind ex_event,
200 struct symtab_and_line *sal);
202 static void catch_exception_command_1 (enum exception_event_kind ex_event,
203 char *arg, int tempflag, int from_tty);
205 static void tcatch_command (char *arg, int from_tty);
207 static void ep_skip_leading_whitespace (char **s);
209 /* Prototypes for exported functions. */
211 /* If FALSE, gdb will not use hardware support for watchpoints, even
212 if such is available. */
213 static int can_use_hw_watchpoints;
215 void _initialize_breakpoint (void);
217 extern int addressprint; /* Print machine addresses? */
219 static int internal_breakpoint_number = -1;
221 /* Are we executing breakpoint commands? */
222 static int executing_breakpoint_commands;
224 /* Walk the following statement or block through all breakpoints.
225 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
228 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
230 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
231 for (B = breakpoint_chain; \
232 B ? (TMP=B->next, 1): 0; \
235 /* True if SHIFT_INST_REGS defined, false otherwise. */
237 int must_shift_inst_regs =
238 #if defined(SHIFT_INST_REGS)
245 /* True if breakpoint hit counts should be displayed in breakpoint info. */
247 int show_breakpoint_hit_counts = 1;
249 /* Chain of all breakpoints defined. */
251 struct breakpoint *breakpoint_chain;
253 /* Number of last breakpoint made. */
255 int breakpoint_count;
257 /* Pointer to current exception event record */
258 static struct exception_event_record *current_exception_event;
260 /* Indicator of whether exception catchpoints should be nuked
261 between runs of a program */
262 int exception_catchpoints_are_fragile = 0;
264 /* Indicator of when exception catchpoints set-up should be
265 reinitialized -- e.g. when program is re-run */
266 int exception_support_initialized = 0;
268 /* This function returns a pointer to the string representation of the
269 pathname of the dynamically-linked library that has just been
272 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
273 or undefined results are guaranteed.
275 This string's contents are only valid immediately after the
276 inferior has stopped in the dynamic linker hook, and becomes
277 invalid as soon as the inferior is continued. Clients should make
278 a copy of this string if they wish to continue the inferior and
279 then access the string. */
281 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
282 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
285 /* This function returns a pointer to the string representation of the
286 pathname of the dynamically-linked library that has just been
289 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
290 TRUE, or undefined results are guaranteed.
292 This string's contents are only valid immediately after the
293 inferior has stopped in the dynamic linker hook, and becomes
294 invalid as soon as the inferior is continued. Clients should make
295 a copy of this string if they wish to continue the inferior and
296 then access the string. */
298 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
299 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
302 /* This function is called by the "catch load" command. It allows the
303 debugger to be notified by the dynamic linker when a specified
304 library file (or any library file, if filename is NULL) is loaded. */
306 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
307 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
308 error ("catch of library loads not yet implemented on this platform")
311 /* This function is called by the "catch unload" command. It allows
312 the debugger to be notified by the dynamic linker when a specified
313 library file (or any library file, if filename is NULL) is
316 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
317 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \
318 error ("catch of library unloads not yet implemented on this platform")
321 /* Set breakpoint count to NUM. */
324 set_breakpoint_count (int num)
326 breakpoint_count = num;
327 set_internalvar (lookup_internalvar ("bpnum"),
328 value_from_longest (builtin_type_int, (LONGEST) num));
331 /* Used in run_command to zero the hit count when a new run starts. */
334 clear_breakpoint_hit_counts (void)
336 struct breakpoint *b;
342 /* Default address, symtab and line to put a breakpoint at
343 for "break" command with no arg.
344 if default_breakpoint_valid is zero, the other three are
345 not valid, and "break" with no arg is an error.
347 This set by print_stack_frame, which calls set_default_breakpoint. */
349 int default_breakpoint_valid;
350 CORE_ADDR default_breakpoint_address;
351 struct symtab *default_breakpoint_symtab;
352 int default_breakpoint_line;
354 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
355 Advance *PP after the string and any trailing whitespace.
357 Currently the string can either be a number or "$" followed by the name
358 of a convenience variable. Making it an expression wouldn't work well
359 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
361 TRAILER is a character which can be found after the number; most
362 commonly this is `-'. If you don't want a trailer, use \0. */
364 get_number_trailer (char **pp, int trailer)
366 int retval = 0; /* default */
370 /* Empty line means refer to the last breakpoint. */
371 return breakpoint_count;
374 /* Make a copy of the name, so we can null-terminate it
375 to pass to lookup_internalvar(). */
380 while (isalnum (*p) || *p == '_')
382 varname = (char *) alloca (p - start + 1);
383 strncpy (varname, start, p - start);
384 varname[p - start] = '\0';
385 val = value_of_internalvar (lookup_internalvar (varname));
386 if (TYPE_CODE (VALUE_TYPE (val)) == TYPE_CODE_INT)
387 retval = (int) value_as_long (val);
390 printf_filtered ("Convenience variable must have integer value.\n");
398 while (*p >= '0' && *p <= '9')
401 /* There is no number here. (e.g. "cond a == b"). */
403 /* Skip non-numeric token */
404 while (*p && !isspace((int) *p))
406 /* Return zero, which caller must interpret as error. */
412 if (!(isspace (*p) || *p == '\0' || *p == trailer))
414 /* Trailing junk: return 0 and let caller print error msg. */
415 while (!(isspace (*p) || *p == '\0' || *p == trailer))
426 /* Like get_number_trailer, but don't allow a trailer. */
428 get_number (char **pp)
430 return get_number_trailer (pp, '\0');
433 /* Parse a number or a range.
434 * A number will be of the form handled by get_number.
435 * A range will be of the form <number1> - <number2>, and
436 * will represent all the integers between number1 and number2,
439 * While processing a range, this fuction is called iteratively;
440 * At each call it will return the next value in the range.
442 * At the beginning of parsing a range, the char pointer PP will
443 * be advanced past <number1> and left pointing at the '-' token.
444 * Subsequent calls will not advance the pointer until the range
445 * is completed. The call that completes the range will advance
446 * pointer PP past <number2>.
450 get_number_or_range (char **pp)
452 static int last_retval, end_value;
453 static char *end_ptr;
454 static int in_range = 0;
458 /* Default case: pp is pointing either to a solo number,
459 or to the first number of a range. */
460 last_retval = get_number_trailer (pp, '-');
465 /* This is the start of a range (<number1> - <number2>).
466 Skip the '-', parse and remember the second number,
467 and also remember the end of the final token. */
471 while (isspace ((int) *end_ptr))
472 end_ptr++; /* skip white space */
473 end_value = get_number (temp);
474 if (end_value < last_retval)
476 error ("inverted range");
478 else if (end_value == last_retval)
480 /* degenerate range (number1 == number2). Advance the
481 token pointer so that the range will be treated as a
490 error ("negative value");
493 /* pp points to the '-' that betokens a range. All
494 number-parsing has already been done. Return the next
495 integer value (one greater than the saved previous value).
496 Do not advance the token pointer 'pp' until the end of range
499 if (++last_retval == end_value)
501 /* End of range reached; advance token pointer. */
511 /* condition N EXP -- set break condition of breakpoint N to EXP. */
514 condition_command (char *arg, int from_tty)
516 register struct breakpoint *b;
521 error_no_arg ("breakpoint number");
524 bnum = get_number (&p);
526 error ("Bad breakpoint argument: '%s'", arg);
529 if (b->number == bnum)
536 if (b->cond_string != NULL)
537 xfree (b->cond_string);
542 b->cond_string = NULL;
544 printf_filtered ("Breakpoint %d now unconditional.\n", bnum);
549 /* I don't know if it matters whether this is the string the user
550 typed in or the decompiled expression. */
551 b->cond_string = savestring (arg, strlen (arg));
552 b->cond = parse_exp_1 (&arg, block_for_pc (b->address), 0);
554 error ("Junk at end of expression");
556 breakpoints_changed ();
560 error ("No breakpoint number %d.", bnum);
565 commands_command (char *arg, int from_tty)
567 register struct breakpoint *b;
570 struct command_line *l;
572 /* If we allowed this, we would have problems with when to
573 free the storage, if we change the commands currently
576 if (executing_breakpoint_commands)
577 error ("Can't use the \"commands\" command among a breakpoint's commands.");
580 bnum = get_number (&p);
583 error ("Unexpected extra arguments following breakpoint number.");
586 if (b->number == bnum)
590 "Type commands for when breakpoint %d is hit, one per line.",
592 l = read_command_lines (tmpbuf, from_tty);
593 free_command_lines (&b->commands);
595 breakpoints_changed ();
598 error ("No breakpoint number %d.", bnum);
601 /* Like target_read_memory() but if breakpoints are inserted, return
602 the shadow contents instead of the breakpoints themselves.
604 Read "memory data" from whatever target or inferior we have.
605 Returns zero if successful, errno value if not. EIO is used
606 for address out of bounds. If breakpoints are inserted, returns
607 shadow contents, not the breakpoints themselves. From breakpoint.c. */
610 read_memory_nobpt (CORE_ADDR memaddr, char *myaddr, unsigned len)
613 struct breakpoint *b;
614 CORE_ADDR bp_addr = 0;
617 if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL)
618 /* No breakpoints on this machine. */
619 return target_read_memory (memaddr, myaddr, len);
623 if (b->type == bp_none)
624 warning ("reading through apparently deleted breakpoint #%d?",
627 /* memory breakpoint? */
628 if (b->type == bp_watchpoint
629 || b->type == bp_hardware_watchpoint
630 || b->type == bp_read_watchpoint
631 || b->type == bp_access_watchpoint)
636 /* Addresses and length of the part of the breakpoint that
638 /* XXXX The m68k, sh and h8300 have different local and remote
639 breakpoint values. BREAKPOINT_FROM_PC still manages to
640 correctly determine the breakpoints memory address and size
641 for these targets. */
642 bp_addr = b->address;
644 if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL)
649 if (bp_addr + bp_size <= memaddr)
650 /* The breakpoint is entirely before the chunk of memory we
653 if (bp_addr >= memaddr + len)
654 /* The breakpoint is entirely after the chunk of memory we are
657 /* Copy the breakpoint from the shadow contents, and recurse for
658 the things before and after. */
660 /* Offset within shadow_contents. */
663 if (bp_addr < memaddr)
665 /* Only copy the second part of the breakpoint. */
666 bp_size -= memaddr - bp_addr;
667 bptoffset = memaddr - bp_addr;
671 if (bp_addr + bp_size > memaddr + len)
673 /* Only copy the first part of the breakpoint. */
674 bp_size -= (bp_addr + bp_size) - (memaddr + len);
677 memcpy (myaddr + bp_addr - memaddr,
678 b->shadow_contents + bptoffset, bp_size);
680 if (bp_addr > memaddr)
682 /* Copy the section of memory before the breakpoint. */
683 status = read_memory_nobpt (memaddr, myaddr, bp_addr - memaddr);
688 if (bp_addr + bp_size < memaddr + len)
690 /* Copy the section of memory after the breakpoint. */
691 status = read_memory_nobpt (bp_addr + bp_size,
692 myaddr + bp_addr + bp_size - memaddr,
693 memaddr + len - (bp_addr + bp_size));
700 /* Nothing overlaps. Just call read_memory_noerr. */
701 return target_read_memory (memaddr, myaddr, len);
705 /* insert_breakpoints is used when starting or continuing the program.
706 remove_breakpoints is used when the program stops.
707 Both return zero if successful,
708 or an `errno' value if could not write the inferior. */
711 insert_breakpoints (void)
713 register struct breakpoint *b, *temp;
714 int return_val = 0; /* return success code. */
716 int disabled_breaks = 0;
718 static char message1[] = "Error inserting catchpoint %d:\n";
719 static char message[sizeof (message1) + 30];
722 ALL_BREAKPOINTS_SAFE (b, temp)
724 if (b->enable == permanent)
725 /* Permanent breakpoints cannot be inserted or removed. */
727 else if (b->type != bp_watchpoint
728 && b->type != bp_hardware_watchpoint
729 && b->type != bp_read_watchpoint
730 && b->type != bp_access_watchpoint
731 && b->type != bp_catch_fork
732 && b->type != bp_catch_vfork
733 && b->type != bp_catch_exec
734 && b->type != bp_catch_throw
735 && b->type != bp_catch_catch
736 && b->enable != disabled
737 && b->enable != shlib_disabled
738 && b->enable != call_disabled
742 if (b->type == bp_hardware_breakpoint)
743 val = target_insert_hw_breakpoint (b->address, b->shadow_contents);
746 /* Check to see if breakpoint is in an overlay section;
747 if so, we should set the breakpoint at the LMA address.
748 Only if the section is currently mapped should we ALSO
749 set a break at the VMA address. */
750 if (overlay_debugging && b->section &&
751 section_is_overlay (b->section))
755 addr = overlay_unmapped_address (b->address, b->section);
756 val = target_insert_breakpoint (addr, b->shadow_contents);
757 /* This would be the time to check val, to see if the
758 breakpoint write to the load address succeeded.
759 However, this might be an ordinary occurrance, eg. if
760 the unmapped overlay is in ROM. */
761 val = 0; /* in case unmapped address failed */
762 if (section_is_mapped (b->section))
763 val = target_insert_breakpoint (b->address,
766 else /* ordinary (non-overlay) address */
767 val = target_insert_breakpoint (b->address, b->shadow_contents);
771 /* Can't set the breakpoint. */
772 #if defined (DISABLE_UNSETTABLE_BREAK)
773 if (DISABLE_UNSETTABLE_BREAK (b->address))
775 /* See also: disable_breakpoints_in_shlibs. */
777 b->enable = shlib_disabled;
778 if (!disabled_breaks)
780 target_terminal_ours_for_output ();
781 warning ("Cannot insert breakpoint %d:", b->number);
782 warning ("Temporarily disabling shared library breakpoints:");
785 warning ("breakpoint #%d ", b->number);
790 target_terminal_ours_for_output ();
791 warning ("Cannot insert breakpoint %d:", b->number);
792 #ifdef ONE_PROCESS_WRITETEXT
793 warning ("The same program may be running in another process.");
795 memory_error (val, b->address); /* which bombs us out */
802 return_val = val; /* remember failure */
804 else if (ep_is_exception_catchpoint (b)
805 && b->enable != disabled
806 && b->enable != shlib_disabled
807 && b->enable != call_disabled
812 /* If we get here, we must have a callback mechanism for exception
813 events -- with g++ style embedded label support, we insert
814 ordinary breakpoints and not catchpoints. */
815 /* Format possible error message */
816 sprintf (message, message1, b->number);
818 val = target_insert_breakpoint (b->address, b->shadow_contents);
821 /* Couldn't set breakpoint for some reason */
822 target_terminal_ours_for_output ();
823 warning ("Cannot insert catchpoint %d; disabling it.",
825 b->enable = disabled;
829 /* Bp set, now make sure callbacks are enabled */
831 args_for_catchpoint_enable args;
832 args.kind = b->type == bp_catch_catch ?
833 EX_EVENT_CATCH : EX_EVENT_THROW;
835 val = catch_errors (cover_target_enable_exception_callback,
837 message, RETURN_MASK_ALL);
838 if (val != 0 && val != -1)
842 /* Check if something went wrong; val == 0 can be ignored */
845 /* something went wrong */
846 target_terminal_ours_for_output ();
847 warning ("Cannot insert catchpoint %d; disabling it.",
849 b->enable = disabled;
854 return_val = val; /* remember failure */
857 else if ((b->type == bp_hardware_watchpoint ||
858 b->type == bp_read_watchpoint ||
859 b->type == bp_access_watchpoint)
860 && b->enable == enabled
861 && b->disposition != del_at_next_stop
865 struct frame_info *saved_frame;
866 int saved_level, within_current_scope;
867 value_ptr mark = value_mark ();
870 /* Save the current frame and level so we can restore it after
871 evaluating the watchpoint expression on its own frame. */
872 saved_frame = selected_frame;
873 saved_level = selected_frame_level;
875 /* Determine if the watchpoint is within scope. */
876 if (b->exp_valid_block == NULL)
877 within_current_scope = 1;
880 struct frame_info *fi;
882 /* There might be no current frame at this moment if we are
883 resuming from a step over a breakpoint.
884 Set up current frame before trying to find the watchpoint
886 get_current_frame ();
887 fi = find_frame_addr_in_frame_chain (b->watchpoint_frame);
888 within_current_scope = (fi != NULL);
889 if (within_current_scope)
890 select_frame (fi, -1);
893 if (within_current_scope)
895 /* Evaluate the expression and cut the chain of values
896 produced off from the value chain.
898 Make sure the value returned isn't lazy; we use
899 laziness to determine what memory GDB actually needed
900 in order to compute the value of the expression. */
901 v = evaluate_expression (b->exp);
903 value_release_to_mark (mark);
908 /* Look at each value on the value chain. */
909 for (; v; v = v->next)
911 /* If it's a memory location, and GDB actually needed
912 its contents to evaluate the expression, then we
914 if (VALUE_LVAL (v) == lval_memory
917 struct type *vtype = check_typedef (VALUE_TYPE (v));
919 /* We only watch structs and arrays if user asked
920 for it explicitly, never if they just happen to
921 appear in the middle of some value chain. */
922 if (v == b->val_chain
923 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
924 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
929 addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
930 len = TYPE_LENGTH (VALUE_TYPE (v));
932 if (b->type == bp_read_watchpoint)
934 else if (b->type == bp_access_watchpoint)
937 val = target_insert_watchpoint (addr, len, type);
940 /* Don't exit the loop, try to insert
941 every value on the value chain. That's
942 because we will be removing all the
943 watches below, and removing a
944 watchpoint we didn't insert could have
952 /* Failure to insert a watchpoint on any memory value in the
953 value chain brings us here. */
956 remove_breakpoint (b, mark_uninserted);
957 warning ("Could not insert hardware watchpoint %d.",
964 printf_filtered ("Hardware watchpoint %d deleted ", b->number);
965 printf_filtered ("because the program has left the block \n");
966 printf_filtered ("in which its expression is valid.\n");
967 if (b->related_breakpoint)
968 b->related_breakpoint->disposition = del_at_next_stop;
969 b->disposition = del_at_next_stop;
972 /* Restore the frame and level. */
973 if ((saved_frame != selected_frame) ||
974 (saved_level != selected_frame_level))
975 select_frame (saved_frame, saved_level);
978 return_val = val; /* remember failure */
980 else if ((b->type == bp_catch_fork
981 || b->type == bp_catch_vfork
982 || b->type == bp_catch_exec)
983 && b->enable == enabled
991 val = target_insert_fork_catchpoint (inferior_pid);
994 val = target_insert_vfork_catchpoint (inferior_pid);
997 val = target_insert_exec_catchpoint (inferior_pid);
1000 warning ("Internal error, %s line %d.", __FILE__, __LINE__);
1005 target_terminal_ours_for_output ();
1006 warning ("Cannot insert catchpoint %d.", b->number);
1012 return_val = val; /* remember failure */
1021 remove_breakpoints (void)
1023 register struct breakpoint *b;
1030 val = remove_breakpoint (b, mark_uninserted);
1039 remove_hw_watchpoints (void)
1041 register struct breakpoint *b;
1047 && (b->type == bp_hardware_watchpoint
1048 || b->type == bp_read_watchpoint
1049 || b->type == bp_access_watchpoint))
1051 val = remove_breakpoint (b, mark_uninserted);
1060 reattach_breakpoints (int pid)
1062 register struct breakpoint *b;
1064 int saved_inferior_pid = inferior_pid;
1066 /* FIXME: use a cleanup, to insure that inferior_pid gets replaced! */
1067 inferior_pid = pid; /* Because remove_breakpoint will use this global. */
1072 remove_breakpoint (b, mark_inserted);
1073 if (b->type == bp_hardware_breakpoint)
1074 val = target_insert_hw_breakpoint (b->address, b->shadow_contents);
1076 val = target_insert_breakpoint (b->address, b->shadow_contents);
1079 inferior_pid = saved_inferior_pid;
1084 inferior_pid = saved_inferior_pid;
1089 update_breakpoints_after_exec (void)
1091 struct breakpoint *b;
1092 struct breakpoint *temp;
1094 /* Doing this first prevents the badness of having delete_breakpoint()
1095 write a breakpoint's current "shadow contents" to lift the bp. That
1096 shadow is NOT valid after an exec()! */
1097 mark_breakpoints_out ();
1099 ALL_BREAKPOINTS_SAFE (b, temp)
1101 /* Solib breakpoints must be explicitly reset after an exec(). */
1102 if (b->type == bp_shlib_event)
1104 delete_breakpoint (b);
1108 /* Thread event breakpoints must be set anew after an exec(). */
1109 if (b->type == bp_thread_event)
1111 delete_breakpoint (b);
1115 /* Step-resume breakpoints are meaningless after an exec(). */
1116 if (b->type == bp_step_resume)
1118 delete_breakpoint (b);
1122 /* Ditto the sigtramp handler breakpoints. */
1123 if (b->type == bp_through_sigtramp)
1125 delete_breakpoint (b);
1129 /* Ditto the exception-handling catchpoints. */
1130 if ((b->type == bp_catch_catch) || (b->type == bp_catch_throw))
1132 delete_breakpoint (b);
1136 /* Don't delete an exec catchpoint, because else the inferior
1137 won't stop when it ought!
1139 Similarly, we probably ought to keep vfork catchpoints, 'cause
1140 on this target, we may not be able to stop when the vfork is
1141 seen, but only when the subsequent exec is seen. (And because
1142 deleting fork catchpoints here but not vfork catchpoints will
1143 seem mysterious to users, keep those too.)
1145 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1146 target address field, if any, is sufficient to have it be reset
1147 automagically. Certainly on HP-UX that's true. */
1148 if ((b->type == bp_catch_exec) ||
1149 (b->type == bp_catch_vfork) ||
1150 (b->type == bp_catch_fork))
1152 b->address = (CORE_ADDR) NULL;
1156 /* bp_finish is a special case. The only way we ought to be able
1157 to see one of these when an exec() has happened, is if the user
1158 caught a vfork, and then said "finish". Ordinarily a finish just
1159 carries them to the call-site of the current callee, by setting
1160 a temporary bp there and resuming. But in this case, the finish
1161 will carry them entirely through the vfork & exec.
1163 We don't want to allow a bp_finish to remain inserted now. But
1164 we can't safely delete it, 'cause finish_command has a handle to
1165 the bp on a bpstat, and will later want to delete it. There's a
1166 chance (and I've seen it happen) that if we delete the bp_finish
1167 here, that its storage will get reused by the time finish_command
1168 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1169 We really must allow finish_command to delete a bp_finish.
1171 In the absense of a general solution for the "how do we know
1172 it's safe to delete something others may have handles to?"
1173 problem, what we'll do here is just uninsert the bp_finish, and
1174 let finish_command delete it.
1176 (We know the bp_finish is "doomed" in the sense that it's
1177 momentary, and will be deleted as soon as finish_command sees
1178 the inferior stopped. So it doesn't matter that the bp's
1179 address is probably bogus in the new a.out, unlike e.g., the
1180 solib breakpoints.) */
1182 if (b->type == bp_finish)
1187 /* Without a symbolic address, we have little hope of the
1188 pre-exec() address meaning the same thing in the post-exec()
1190 if (b->addr_string == NULL)
1192 delete_breakpoint (b);
1196 /* If this breakpoint has survived the above battery of checks, then
1197 it must have a symbolic address. Be sure that it gets reevaluated
1198 to a target address, rather than reusing the old evaluation. */
1199 b->address = (CORE_ADDR) NULL;
1204 detach_breakpoints (int pid)
1206 register struct breakpoint *b;
1208 int saved_inferior_pid = inferior_pid;
1210 if (pid == inferior_pid)
1211 error ("Cannot detach breakpoints of inferior_pid");
1213 /* FIXME: use a cleanup, to insure that inferior_pid gets replaced! */
1214 inferior_pid = pid; /* Because remove_breakpoint will use this global. */
1219 val = remove_breakpoint (b, mark_inserted);
1222 inferior_pid = saved_inferior_pid;
1227 inferior_pid = saved_inferior_pid;
1232 remove_breakpoint (struct breakpoint *b, insertion_state_t is)
1236 if (b->enable == permanent)
1237 /* Permanent breakpoints cannot be inserted or removed. */
1240 if (b->type == bp_none)
1241 warning ("attempted to remove apparently deleted breakpoint #%d?",
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_catch_fork
1249 && b->type != bp_catch_vfork
1250 && b->type != bp_catch_exec
1251 && b->type != bp_catch_catch
1252 && b->type != bp_catch_throw)
1254 if (b->type == bp_hardware_breakpoint)
1255 val = target_remove_hw_breakpoint (b->address, b->shadow_contents);
1258 /* Check to see if breakpoint is in an overlay section;
1259 if so, we should remove the breakpoint at the LMA address.
1260 If that is not equal to the raw address, then we should
1261 presumably remove the breakpoint there as well. */
1262 if (overlay_debugging && b->section &&
1263 section_is_overlay (b->section))
1267 addr = overlay_unmapped_address (b->address, b->section);
1268 val = target_remove_breakpoint (addr, b->shadow_contents);
1269 /* This would be the time to check val, to see if the
1270 shadow breakpoint write to the load address succeeded.
1271 However, this might be an ordinary occurrance, eg. if
1272 the unmapped overlay is in ROM. */
1273 val = 0; /* in case unmapped address failed */
1274 if (section_is_mapped (b->section))
1275 val = target_remove_breakpoint (b->address,
1276 b->shadow_contents);
1278 else /* ordinary (non-overlay) address */
1279 val = target_remove_breakpoint (b->address, b->shadow_contents);
1283 b->inserted = (is == mark_inserted);
1285 else if ((b->type == bp_hardware_watchpoint ||
1286 b->type == bp_read_watchpoint ||
1287 b->type == bp_access_watchpoint)
1288 && b->enable == enabled
1293 b->inserted = (is == mark_inserted);
1294 /* Walk down the saved value chain. */
1295 for (v = b->val_chain; v; v = v->next)
1297 /* For each memory reference remove the watchpoint
1299 if (VALUE_LVAL (v) == lval_memory
1300 && ! VALUE_LAZY (v))
1302 struct type *vtype = check_typedef (VALUE_TYPE (v));
1304 if (v == b->val_chain
1305 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
1306 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
1311 addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
1312 len = TYPE_LENGTH (VALUE_TYPE (v));
1314 if (b->type == bp_read_watchpoint)
1316 else if (b->type == bp_access_watchpoint)
1319 val = target_remove_watchpoint (addr, len, type);
1326 /* Failure to remove any of the hardware watchpoints comes here. */
1327 if ((is == mark_uninserted) && (b->inserted))
1328 warning ("Could not remove hardware watchpoint %d.",
1331 /* Free the saved value chain. We will construct a new one
1332 the next time the watchpoint is inserted. */
1333 for (v = b->val_chain; v; v = n)
1338 b->val_chain = NULL;
1340 else if ((b->type == bp_catch_fork ||
1341 b->type == bp_catch_vfork ||
1342 b->type == bp_catch_exec)
1343 && b->enable == enabled
1350 val = target_remove_fork_catchpoint (inferior_pid);
1352 case bp_catch_vfork:
1353 val = target_remove_vfork_catchpoint (inferior_pid);
1356 val = target_remove_exec_catchpoint (inferior_pid);
1359 warning ("Internal error, %s line %d.", __FILE__, __LINE__);
1364 b->inserted = (is == mark_inserted);
1366 else if ((b->type == bp_catch_catch ||
1367 b->type == bp_catch_throw)
1368 && b->enable == enabled
1372 val = target_remove_breakpoint (b->address, b->shadow_contents);
1375 b->inserted = (is == mark_inserted);
1377 else if (ep_is_exception_catchpoint (b)
1378 && b->inserted /* sometimes previous insert doesn't happen */
1379 && b->enable == enabled
1383 val = target_remove_breakpoint (b->address, b->shadow_contents);
1387 b->inserted = (is == mark_inserted);
1393 /* Clear the "inserted" flag in all breakpoints. */
1396 mark_breakpoints_out (void)
1398 register struct breakpoint *b;
1404 /* Clear the "inserted" flag in all breakpoints and delete any
1405 breakpoints which should go away between runs of the program.
1407 Plus other such housekeeping that has to be done for breakpoints
1410 Note: this function gets called at the end of a run (by
1411 generic_mourn_inferior) and when a run begins (by
1412 init_wait_for_inferior). */
1417 breakpoint_init_inferior (enum inf_context context)
1419 register struct breakpoint *b, *temp;
1420 static int warning_needed = 0;
1422 ALL_BREAKPOINTS_SAFE (b, temp)
1429 case bp_watchpoint_scope:
1431 /* If the call dummy breakpoint is at the entry point it will
1432 cause problems when the inferior is rerun, so we better
1435 Also get rid of scope breakpoints. */
1436 delete_breakpoint (b);
1440 case bp_hardware_watchpoint:
1441 case bp_read_watchpoint:
1442 case bp_access_watchpoint:
1444 /* Likewise for watchpoints on local expressions. */
1445 if (b->exp_valid_block != NULL)
1446 delete_breakpoint (b);
1449 /* Likewise for exception catchpoints in dynamic-linked
1450 executables where required */
1451 if (ep_is_exception_catchpoint (b) &&
1452 exception_catchpoints_are_fragile)
1455 delete_breakpoint (b);
1461 if (exception_catchpoints_are_fragile)
1462 exception_support_initialized = 0;
1464 /* Don't issue the warning unless it's really needed... */
1465 if (warning_needed && (context != inf_exited))
1467 warning ("Exception catchpoints from last run were deleted.");
1468 warning ("You must reinsert them explicitly.");
1473 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1474 exists at PC. It returns ordinary_breakpoint_here if it's an
1475 ordinary breakpoint, or permanent_breakpoint_here if it's a
1476 permanent breakpoint.
1477 - When continuing from a location with an ordinary breakpoint, we
1478 actually single step once before calling insert_breakpoints.
1479 - When continuing from a localion with a permanent breakpoint, we
1480 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1481 the target, to advance the PC past the breakpoint. */
1483 enum breakpoint_here
1484 breakpoint_here_p (CORE_ADDR pc)
1486 register struct breakpoint *b;
1487 int any_breakpoint_here = 0;
1490 if ((b->enable == enabled
1491 || b->enable == permanent)
1492 && b->address == pc) /* bp is enabled and matches pc */
1494 if (overlay_debugging &&
1495 section_is_overlay (b->section) &&
1496 !section_is_mapped (b->section))
1497 continue; /* unmapped overlay -- can't be a match */
1498 else if (b->enable == permanent)
1499 return permanent_breakpoint_here;
1501 any_breakpoint_here = 1;
1504 return any_breakpoint_here ? ordinary_breakpoint_here : 0;
1508 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1509 but it only returns true if there is actually a breakpoint inserted
1513 breakpoint_inserted_here_p (CORE_ADDR pc)
1515 register struct breakpoint *b;
1519 && b->address == pc) /* bp is inserted and matches pc */
1521 if (overlay_debugging &&
1522 section_is_overlay (b->section) &&
1523 !section_is_mapped (b->section))
1524 continue; /* unmapped overlay -- can't be a match */
1532 /* Return nonzero if FRAME is a dummy frame. We can't use
1533 PC_IN_CALL_DUMMY because figuring out the saved SP would take too
1534 much time, at least using get_saved_register on the 68k. This
1535 means that for this function to work right a port must use the
1536 bp_call_dummy breakpoint. */
1539 frame_in_dummy (struct frame_info *frame)
1541 struct breakpoint *b;
1546 if (USE_GENERIC_DUMMY_FRAMES)
1547 return generic_pc_in_call_dummy (frame->pc, frame->frame, frame->frame);
1551 if (b->type == bp_call_dummy
1552 && b->frame == frame->frame
1553 /* We need to check the PC as well as the frame on the sparc,
1554 for signals.exp in the testsuite. */
1557 - SIZEOF_CALL_DUMMY_WORDS / sizeof (LONGEST) * REGISTER_SIZE))
1558 && frame->pc <= b->address)
1564 /* breakpoint_thread_match (PC, PID) returns true if the breakpoint at
1565 PC is valid for process/thread PID. */
1568 breakpoint_thread_match (CORE_ADDR pc, int pid)
1570 struct breakpoint *b;
1573 thread = pid_to_thread_id (pid);
1576 if (b->enable != disabled
1577 && b->enable != shlib_disabled
1578 && b->enable != call_disabled
1580 && (b->thread == -1 || b->thread == thread))
1582 if (overlay_debugging &&
1583 section_is_overlay (b->section) &&
1584 !section_is_mapped (b->section))
1585 continue; /* unmapped overlay -- can't be a match */
1594 /* bpstat stuff. External routines' interfaces are documented
1598 ep_is_catchpoint (struct breakpoint *ep)
1601 (ep->type == bp_catch_load)
1602 || (ep->type == bp_catch_unload)
1603 || (ep->type == bp_catch_fork)
1604 || (ep->type == bp_catch_vfork)
1605 || (ep->type == bp_catch_exec)
1606 || (ep->type == bp_catch_catch)
1607 || (ep->type == bp_catch_throw);
1609 /* ??rehrauer: Add more kinds here, as are implemented... */
1613 ep_is_shlib_catchpoint (struct breakpoint *ep)
1616 (ep->type == bp_catch_load)
1617 || (ep->type == bp_catch_unload);
1621 ep_is_exception_catchpoint (struct breakpoint *ep)
1624 (ep->type == bp_catch_catch)
1625 || (ep->type == bp_catch_throw);
1628 /* Clear a bpstat so that it says we are not at any breakpoint.
1629 Also free any storage that is part of a bpstat. */
1632 bpstat_clear (bpstat *bsp)
1643 if (p->old_val != NULL)
1644 value_free (p->old_val);
1651 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1652 is part of the bpstat is copied as well. */
1655 bpstat_copy (bpstat bs)
1659 bpstat retval = NULL;
1664 for (; bs != NULL; bs = bs->next)
1666 tmp = (bpstat) xmalloc (sizeof (*tmp));
1667 memcpy (tmp, bs, sizeof (*tmp));
1669 /* This is the first thing in the chain. */
1679 /* Find the bpstat associated with this breakpoint */
1682 bpstat_find_breakpoint (bpstat bsp, struct breakpoint *breakpoint)
1687 for (; bsp != NULL; bsp = bsp->next)
1689 if (bsp->breakpoint_at == breakpoint)
1695 /* Find a step_resume breakpoint associated with this bpstat.
1696 (If there are multiple step_resume bp's on the list, this function
1697 will arbitrarily pick one.)
1699 It is an error to use this function if BPSTAT doesn't contain a
1700 step_resume breakpoint.
1702 See wait_for_inferior's use of this function. */
1704 bpstat_find_step_resume_breakpoint (bpstat bsp)
1707 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1709 for (; bsp != NULL; bsp = bsp->next)
1711 if ((bsp->breakpoint_at != NULL) &&
1712 (bsp->breakpoint_at->type == bp_step_resume))
1713 return bsp->breakpoint_at;
1716 error ("Internal error (no step_resume breakpoint found)");
1720 /* Return the breakpoint number of the first breakpoint we are stopped
1721 at. *BSP upon return is a bpstat which points to the remaining
1722 breakpoints stopped at (but which is not guaranteed to be good for
1723 anything but further calls to bpstat_num).
1724 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1727 bpstat_num (bpstat *bsp)
1729 struct breakpoint *b;
1732 return 0; /* No more breakpoint values */
1735 b = (*bsp)->breakpoint_at;
1736 *bsp = (*bsp)->next;
1738 return -1; /* breakpoint that's been deleted since */
1740 return b->number; /* We have its number */
1744 /* Modify BS so that the actions will not be performed. */
1747 bpstat_clear_actions (bpstat bs)
1749 for (; bs != NULL; bs = bs->next)
1751 bs->commands = NULL;
1752 if (bs->old_val != NULL)
1754 value_free (bs->old_val);
1760 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1763 cleanup_executing_breakpoints (PTR ignore)
1765 executing_breakpoint_commands = 0;
1768 /* Execute all the commands associated with all the breakpoints at this
1769 location. Any of these commands could cause the process to proceed
1770 beyond this point, etc. We look out for such changes by checking
1771 the global "breakpoint_proceeded" after each command. */
1774 bpstat_do_actions (bpstat *bsp)
1777 struct cleanup *old_chain;
1778 struct command_line *cmd;
1780 /* Avoid endless recursion if a `source' command is contained
1782 if (executing_breakpoint_commands)
1785 executing_breakpoint_commands = 1;
1786 old_chain = make_cleanup (cleanup_executing_breakpoints, 0);
1789 /* Note that (as of this writing), our callers all appear to
1790 be passing us the address of global stop_bpstat. And, if
1791 our calls to execute_control_command cause the inferior to
1792 proceed, that global (and hence, *bsp) will change.
1794 We must be careful to not touch *bsp unless the inferior
1795 has not proceeded. */
1797 /* This pointer will iterate over the list of bpstat's. */
1800 breakpoint_proceeded = 0;
1801 for (; bs != NULL; bs = bs->next)
1806 execute_control_command (cmd);
1808 if (breakpoint_proceeded)
1813 if (breakpoint_proceeded)
1814 /* The inferior is proceeded by the command; bomb out now.
1815 The bpstat chain has been blown away by wait_for_inferior.
1816 But since execution has stopped again, there is a new bpstat
1817 to look at, so start over. */
1820 bs->commands = NULL;
1823 executing_breakpoint_commands = 0;
1824 discard_cleanups (old_chain);
1827 /* This is the normal print function for a bpstat. In the future,
1828 much of this logic could (should?) be moved to bpstat_stop_status,
1829 by having it set different print_it values.
1831 Current scheme: When we stop, bpstat_print() is called. It loops
1832 through the bpstat list of things causing this stop, calling the
1833 print_bp_stop_message function on each one. The behavior of the
1834 print_bp_stop_message function depends on the print_it field of
1835 bpstat. If such field so indicates, call this function here.
1837 Return values from this routine (ultimately used by bpstat_print()
1838 and normal_stop() to decide what to do):
1839 PRINT_NOTHING: Means we already printed all we needed to print,
1840 don't print anything else.
1841 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
1842 that something to be followed by a location.
1843 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
1844 that something to be followed by a location.
1845 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
1848 static enum print_stop_action
1849 print_it_typical (bpstat bs)
1852 struct cleanup *old_chain;
1853 struct ui_stream *stb;
1854 stb = ui_out_stream_new (uiout);
1855 old_chain = make_cleanup_ui_out_stream_delete (stb);
1857 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
1858 which has since been deleted. */
1859 if (bs->breakpoint_at == NULL)
1860 return PRINT_UNKNOWN;
1862 switch (bs->breakpoint_at->type)
1865 case bp_hardware_breakpoint:
1867 annotate_breakpoint (bs->breakpoint_at->number);
1868 ui_out_text (uiout, "\nBreakpoint ");
1869 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
1870 ui_out_field_string (uiout, "reason", "breakpoint-hit");
1871 ui_out_field_int (uiout, "bkptno", bs->breakpoint_at->number);
1872 ui_out_text (uiout, ", ");
1873 return PRINT_SRC_AND_LOC;
1875 /* I think the user probably only wants to see one breakpoint
1876 number, not all of them. */
1877 annotate_breakpoint (bs->breakpoint_at->number);
1878 printf_filtered ("\nBreakpoint %d, ", bs->breakpoint_at->number);
1879 return PRINT_SRC_AND_LOC;
1883 case bp_shlib_event:
1884 /* Did we stop because the user set the stop_on_solib_events
1885 variable? (If so, we report this as a generic, "Stopped due
1886 to shlib event" message.) */
1887 printf_filtered ("Stopped due to shared library event\n");
1888 return PRINT_NOTHING;
1891 case bp_thread_event:
1892 /* Not sure how we will get here.
1893 GDB should not stop for these breakpoints. */
1894 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
1895 return PRINT_NOTHING;
1899 annotate_catchpoint (bs->breakpoint_at->number);
1900 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
1901 printf_filtered ("loaded");
1902 printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname);
1903 return PRINT_SRC_AND_LOC;
1906 case bp_catch_unload:
1907 annotate_catchpoint (bs->breakpoint_at->number);
1908 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
1909 printf_filtered ("unloaded");
1910 printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname);
1911 return PRINT_SRC_AND_LOC;
1915 annotate_catchpoint (bs->breakpoint_at->number);
1916 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
1917 printf_filtered ("forked");
1918 printf_filtered (" process %d), ",
1919 bs->breakpoint_at->forked_inferior_pid);
1920 return PRINT_SRC_AND_LOC;
1923 case bp_catch_vfork:
1924 annotate_catchpoint (bs->breakpoint_at->number);
1925 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
1926 printf_filtered ("vforked");
1927 printf_filtered (" process %d), ",
1928 bs->breakpoint_at->forked_inferior_pid);
1929 return PRINT_SRC_AND_LOC;
1933 annotate_catchpoint (bs->breakpoint_at->number);
1934 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
1935 bs->breakpoint_at->number,
1936 bs->breakpoint_at->exec_pathname);
1937 return PRINT_SRC_AND_LOC;
1940 case bp_catch_catch:
1941 if (current_exception_event &&
1942 (CURRENT_EXCEPTION_KIND == EX_EVENT_CATCH))
1944 annotate_catchpoint (bs->breakpoint_at->number);
1945 printf_filtered ("\nCatchpoint %d (exception caught), ",
1946 bs->breakpoint_at->number);
1947 printf_filtered ("throw location ");
1948 if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE)
1949 printf_filtered ("%s:%d",
1950 CURRENT_EXCEPTION_THROW_FILE,
1951 CURRENT_EXCEPTION_THROW_LINE);
1953 printf_filtered ("unknown");
1955 printf_filtered (", catch location ");
1956 if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE)
1957 printf_filtered ("%s:%d",
1958 CURRENT_EXCEPTION_CATCH_FILE,
1959 CURRENT_EXCEPTION_CATCH_LINE);
1961 printf_filtered ("unknown");
1963 printf_filtered ("\n");
1964 /* don't bother to print location frame info */
1965 return PRINT_SRC_ONLY;
1969 /* really throw, some other bpstat will handle it */
1970 return PRINT_UNKNOWN;
1974 case bp_catch_throw:
1975 if (current_exception_event &&
1976 (CURRENT_EXCEPTION_KIND == EX_EVENT_THROW))
1978 annotate_catchpoint (bs->breakpoint_at->number);
1979 printf_filtered ("\nCatchpoint %d (exception thrown), ",
1980 bs->breakpoint_at->number);
1981 printf_filtered ("throw location ");
1982 if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE)
1983 printf_filtered ("%s:%d",
1984 CURRENT_EXCEPTION_THROW_FILE,
1985 CURRENT_EXCEPTION_THROW_LINE);
1987 printf_filtered ("unknown");
1989 printf_filtered (", catch location ");
1990 if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE)
1991 printf_filtered ("%s:%d",
1992 CURRENT_EXCEPTION_CATCH_FILE,
1993 CURRENT_EXCEPTION_CATCH_LINE);
1995 printf_filtered ("unknown");
1997 printf_filtered ("\n");
1998 /* don't bother to print location frame info */
1999 return PRINT_SRC_ONLY;
2003 /* really catch, some other bpstat will handle it */
2004 return PRINT_UNKNOWN;
2009 case bp_hardware_watchpoint:
2010 if (bs->old_val != NULL)
2012 annotate_watchpoint (bs->breakpoint_at->number);
2014 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
2015 ui_out_field_string (uiout, "reason", "watchpoint-trigger");
2016 mention (bs->breakpoint_at);
2017 ui_out_list_begin (uiout, "value");
2018 ui_out_text (uiout, "\nOld value = ");
2019 value_print (bs->old_val, stb->stream, 0, Val_pretty_default);
2020 ui_out_field_stream (uiout, "old", stb);
2021 ui_out_text (uiout, "\nNew value = ");
2022 value_print (bs->breakpoint_at->val, stb->stream, 0, Val_pretty_default);
2023 ui_out_field_stream (uiout, "new", stb);
2024 ui_out_list_end (uiout);
2025 ui_out_text (uiout, "\n");
2027 mention (bs->breakpoint_at);
2028 printf_filtered ("\nOld value = ");
2029 value_print (bs->old_val, gdb_stdout, 0, Val_pretty_default);
2030 printf_filtered ("\nNew value = ");
2031 value_print (bs->breakpoint_at->val, gdb_stdout, 0,
2032 Val_pretty_default);
2033 printf_filtered ("\n");
2035 value_free (bs->old_val);
2038 /* More than one watchpoint may have been triggered. */
2039 return PRINT_UNKNOWN;
2042 case bp_read_watchpoint:
2044 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
2045 ui_out_field_string (uiout, "reason", "read-watchpoint-trigger");
2046 mention (bs->breakpoint_at);
2047 ui_out_list_begin (uiout, "value");
2048 ui_out_text (uiout, "\nValue = ");
2049 value_print (bs->breakpoint_at->val, stb->stream, 0, Val_pretty_default);
2050 ui_out_field_stream (uiout, "value", stb);
2051 ui_out_list_end (uiout);
2052 ui_out_text (uiout, "\n");
2054 mention (bs->breakpoint_at);
2055 printf_filtered ("\nValue = ");
2056 value_print (bs->breakpoint_at->val, gdb_stdout, 0,
2057 Val_pretty_default);
2058 printf_filtered ("\n");
2060 return PRINT_UNKNOWN;
2063 case bp_access_watchpoint:
2065 if (bs->old_val != NULL)
2067 annotate_watchpoint (bs->breakpoint_at->number);
2068 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
2069 ui_out_field_string (uiout, "reason", "access-watchpoint-trigger");
2070 mention (bs->breakpoint_at);
2071 ui_out_list_begin (uiout, "value");
2072 ui_out_text (uiout, "\nOld value = ");
2073 value_print (bs->old_val, stb->stream, 0, Val_pretty_default);
2074 ui_out_field_stream (uiout, "old", stb);
2075 value_free (bs->old_val);
2077 ui_out_text (uiout, "\nNew value = ");
2081 mention (bs->breakpoint_at);
2082 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
2083 ui_out_field_string (uiout, "reason", "access-watchpoint-trigger");
2084 ui_out_list_begin (uiout, "value");
2085 ui_out_text (uiout, "\nValue = ");
2087 value_print (bs->breakpoint_at->val, stb->stream, 0,Val_pretty_default);
2088 ui_out_field_stream (uiout, "new", stb);
2089 ui_out_list_end (uiout);
2090 ui_out_text (uiout, "\n");
2092 if (bs->old_val != NULL)
2094 annotate_watchpoint (bs->breakpoint_at->number);
2095 mention (bs->breakpoint_at);
2096 printf_filtered ("\nOld value = ");
2097 value_print (bs->old_val, gdb_stdout, 0, Val_pretty_default);
2098 value_free (bs->old_val);
2100 printf_filtered ("\nNew value = ");
2104 mention (bs->breakpoint_at);
2105 printf_filtered ("\nValue = ");
2107 value_print (bs->breakpoint_at->val, gdb_stdout, 0,
2108 Val_pretty_default);
2109 printf_filtered ("\n");
2111 return PRINT_UNKNOWN;
2114 /* Fall through, we don't deal with these types of breakpoints
2119 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
2120 ui_out_field_string (uiout, "reason", "function-finished");
2122 return PRINT_UNKNOWN;
2127 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
2128 ui_out_field_string (uiout, "reason", "location-reached");
2130 return PRINT_UNKNOWN;
2135 case bp_longjmp_resume:
2136 case bp_step_resume:
2137 case bp_through_sigtramp:
2138 case bp_watchpoint_scope:
2141 return PRINT_UNKNOWN;
2145 /* Generic routine for printing messages indicating why we
2146 stopped. The behavior of this function depends on the value
2147 'print_it' in the bpstat structure. Under some circumstances we
2148 may decide not to print anything here and delegate the task to
2151 static enum print_stop_action
2152 print_bp_stop_message (bpstat bs)
2154 switch (bs->print_it)
2157 /* Nothing should be printed for this bpstat entry. */
2158 return PRINT_UNKNOWN;
2162 /* We still want to print the frame, but we already printed the
2163 relevant messages. */
2164 return PRINT_SRC_AND_LOC;
2167 case print_it_normal:
2168 /* Normal case, we handle everything in print_it_typical. */
2169 return print_it_typical (bs);
2172 internal_error (__FILE__, __LINE__,
2173 "print_bp_stop_message: unrecognized enum value");
2178 /* Print a message indicating what happened. This is called from
2179 normal_stop(). The input to this routine is the head of the bpstat
2180 list - a list of the eventpoints that caused this stop. This
2181 routine calls the generic print routine for printing a message
2182 about reasons for stopping. This will print (for example) the
2183 "Breakpoint n," part of the output. The return value of this
2186 PRINT_UNKNOWN: Means we printed nothing
2187 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2188 code to print the location. An example is
2189 "Breakpoint 1, " which should be followed by
2191 PRINT_SRC_ONLY: Means we printed something, but there is no need
2192 to also print the location part of the message.
2193 An example is the catch/throw messages, which
2194 don't require a location appended to the end.
2195 PRINT_NOTHING: We have done some printing and we don't need any
2196 further info to be printed.*/
2198 enum print_stop_action
2199 bpstat_print (bpstat bs)
2203 /* Maybe another breakpoint in the chain caused us to stop.
2204 (Currently all watchpoints go on the bpstat whether hit or not.
2205 That probably could (should) be changed, provided care is taken
2206 with respect to bpstat_explains_signal). */
2207 for (; bs; bs = bs->next)
2209 val = print_bp_stop_message (bs);
2210 if (val == PRINT_SRC_ONLY
2211 || val == PRINT_SRC_AND_LOC
2212 || val == PRINT_NOTHING)
2216 /* We reached the end of the chain, or we got a null BS to start
2217 with and nothing was printed. */
2218 return PRINT_UNKNOWN;
2221 /* Evaluate the expression EXP and return 1 if value is zero.
2222 This is used inside a catch_errors to evaluate the breakpoint condition.
2223 The argument is a "struct expression *" that has been cast to char * to
2224 make it pass through catch_errors. */
2227 breakpoint_cond_eval (PTR exp)
2229 value_ptr mark = value_mark ();
2230 int i = !value_true (evaluate_expression ((struct expression *) exp));
2231 value_free_to_mark (mark);
2235 /* Allocate a new bpstat and chain it to the current one. */
2238 bpstat_alloc (struct breakpoint *b, bpstat cbs /* Current "bs" value */ )
2242 bs = (bpstat) xmalloc (sizeof (*bs));
2244 bs->breakpoint_at = b;
2245 /* If the condition is false, etc., don't do the commands. */
2246 bs->commands = NULL;
2248 bs->print_it = print_it_normal;
2252 /* Possible return values for watchpoint_check (this can't be an enum
2253 because of check_errors). */
2254 /* The watchpoint has been deleted. */
2255 #define WP_DELETED 1
2256 /* The value has changed. */
2257 #define WP_VALUE_CHANGED 2
2258 /* The value has not changed. */
2259 #define WP_VALUE_NOT_CHANGED 3
2261 #define BP_TEMPFLAG 1
2262 #define BP_HARDWAREFLAG 2
2264 /* Check watchpoint condition. */
2267 watchpoint_check (PTR p)
2269 bpstat bs = (bpstat) p;
2270 struct breakpoint *b;
2271 struct frame_info *fr;
2272 int within_current_scope;
2274 b = bs->breakpoint_at;
2276 if (b->exp_valid_block == NULL)
2277 within_current_scope = 1;
2280 /* There is no current frame at this moment. If we're going to have
2281 any chance of handling watchpoints on local variables, we'll need
2282 the frame chain (so we can determine if we're in scope). */
2283 reinit_frame_cache ();
2284 fr = find_frame_addr_in_frame_chain (b->watchpoint_frame);
2285 within_current_scope = (fr != NULL);
2286 if (within_current_scope)
2287 /* If we end up stopping, the current frame will get selected
2288 in normal_stop. So this call to select_frame won't affect
2290 select_frame (fr, -1);
2293 if (within_current_scope)
2295 /* We use value_{,free_to_}mark because it could be a
2296 *long* time before we return to the command level and
2297 call free_all_values. We can't call free_all_values because
2298 we might be in the middle of evaluating a function call. */
2300 value_ptr mark = value_mark ();
2301 value_ptr new_val = evaluate_expression (bs->breakpoint_at->exp);
2302 if (!value_equal (b->val, new_val))
2304 release_value (new_val);
2305 value_free_to_mark (mark);
2306 bs->old_val = b->val;
2308 /* We will stop here */
2309 return WP_VALUE_CHANGED;
2313 /* Nothing changed, don't do anything. */
2314 value_free_to_mark (mark);
2315 /* We won't stop here */
2316 return WP_VALUE_NOT_CHANGED;
2321 /* This seems like the only logical thing to do because
2322 if we temporarily ignored the watchpoint, then when
2323 we reenter the block in which it is valid it contains
2324 garbage (in the case of a function, it may have two
2325 garbage values, one before and one after the prologue).
2326 So we can't even detect the first assignment to it and
2327 watch after that (since the garbage may or may not equal
2328 the first value assigned). */
2329 /* We print all the stop information in print_it_typical(), but
2330 in this case, by the time we call print_it_typical() this bp
2331 will be deleted already. So we have no choice but print the
2332 information here. */
2334 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
2335 ui_out_field_string (uiout, "reason", "watchpoint-scope");
2336 ui_out_text (uiout, "\nWatchpoint ");
2337 ui_out_field_int (uiout, "wpnum", bs->breakpoint_at->number);
2338 ui_out_text (uiout, " deleted because the program has left the block in\n\
2339 which its expression is valid.\n");
2342 Watchpoint %d deleted because the program has left the block in\n\
2343 which its expression is valid.\n", bs->breakpoint_at->number);
2346 if (b->related_breakpoint)
2347 b->related_breakpoint->disposition = del_at_next_stop;
2348 b->disposition = del_at_next_stop;
2354 /* Get a bpstat associated with having just stopped at address *PC
2355 and frame address CORE_ADDRESS. Update *PC to point at the
2356 breakpoint (if we hit a breakpoint). NOT_A_BREAKPOINT is nonzero
2357 if this is known to not be a real breakpoint (it could still be a
2358 watchpoint, though). */
2360 /* Determine whether we stopped at a breakpoint, etc, or whether we
2361 don't understand this stop. Result is a chain of bpstat's such that:
2363 if we don't understand the stop, the result is a null pointer.
2365 if we understand why we stopped, the result is not null.
2367 Each element of the chain refers to a particular breakpoint or
2368 watchpoint at which we have stopped. (We may have stopped for
2369 several reasons concurrently.)
2371 Each element of the chain has valid next, breakpoint_at,
2372 commands, FIXME??? fields. */
2375 bpstat_stop_status (CORE_ADDR *pc, int not_a_breakpoint)
2377 register struct breakpoint *b, *temp;
2379 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2380 int real_breakpoint = 0;
2381 /* Root of the chain of bpstat's */
2382 struct bpstats root_bs[1];
2383 /* Pointer to the last thing in the chain currently. */
2384 bpstat bs = root_bs;
2385 static char message1[] =
2386 "Error evaluating expression for watchpoint %d\n";
2387 char message[sizeof (message1) + 30 /* slop */ ];
2389 /* Get the address where the breakpoint would have been. */
2390 bp_addr = *pc - (not_a_breakpoint && !SOFTWARE_SINGLE_STEP_P () ?
2391 0 : DECR_PC_AFTER_BREAK);
2393 ALL_BREAKPOINTS_SAFE (b, temp)
2395 if (b->enable == disabled
2396 || b->enable == shlib_disabled
2397 || b->enable == call_disabled)
2400 if (b->type != bp_watchpoint
2401 && b->type != bp_hardware_watchpoint
2402 && b->type != bp_read_watchpoint
2403 && b->type != bp_access_watchpoint
2404 && b->type != bp_hardware_breakpoint
2405 && b->type != bp_catch_fork
2406 && b->type != bp_catch_vfork
2407 && b->type != bp_catch_exec
2408 && b->type != bp_catch_catch
2409 && b->type != bp_catch_throw) /* a non-watchpoint bp */
2410 if (b->address != bp_addr || /* address doesn't match or */
2411 (overlay_debugging && /* overlay doesn't match */
2412 section_is_overlay (b->section) &&
2413 !section_is_mapped (b->section)))
2416 if (b->type == bp_hardware_breakpoint
2417 && b->address != (*pc - DECR_PC_AFTER_HW_BREAK))
2420 /* Is this a catchpoint of a load or unload? If so, did we
2421 get a load or unload of the specified library? If not,
2423 if ((b->type == bp_catch_load)
2424 #if defined(SOLIB_HAVE_LOAD_EVENT)
2425 && (!SOLIB_HAVE_LOAD_EVENT (inferior_pid)
2426 || ((b->dll_pathname != NULL)
2427 && (strcmp (b->dll_pathname,
2428 SOLIB_LOADED_LIBRARY_PATHNAME (inferior_pid))
2434 if ((b->type == bp_catch_unload)
2435 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2436 && (!SOLIB_HAVE_UNLOAD_EVENT (inferior_pid)
2437 || ((b->dll_pathname != NULL)
2438 && (strcmp (b->dll_pathname,
2439 SOLIB_UNLOADED_LIBRARY_PATHNAME (inferior_pid))
2445 if ((b->type == bp_catch_fork)
2446 && !target_has_forked (inferior_pid, &b->forked_inferior_pid))
2449 if ((b->type == bp_catch_vfork)
2450 && !target_has_vforked (inferior_pid, &b->forked_inferior_pid))
2453 if ((b->type == bp_catch_exec)
2454 && !target_has_execd (inferior_pid, &b->exec_pathname))
2457 if (ep_is_exception_catchpoint (b) &&
2458 !(current_exception_event = target_get_current_exception_event ()))
2461 /* Come here if it's a watchpoint, or if the break address matches */
2463 bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */
2465 /* Watchpoints may change this, if not found to have triggered. */
2469 sprintf (message, message1, b->number);
2470 if (b->type == bp_watchpoint ||
2471 b->type == bp_hardware_watchpoint)
2473 switch (catch_errors (watchpoint_check, bs, message,
2477 /* We've already printed what needs to be printed. */
2478 /* Actually this is superfluous, because by the time we
2479 call print_it_typical() the wp will be already deleted,
2480 and the function will return immediately. */
2481 bs->print_it = print_it_done;
2484 case WP_VALUE_CHANGED:
2488 case WP_VALUE_NOT_CHANGED:
2490 bs->print_it = print_it_noop;
2497 /* Error from catch_errors. */
2498 printf_filtered ("Watchpoint %d deleted.\n", b->number);
2499 if (b->related_breakpoint)
2500 b->related_breakpoint->disposition = del_at_next_stop;
2501 b->disposition = del_at_next_stop;
2502 /* We've already printed what needs to be printed. */
2503 bs->print_it = print_it_done;
2509 else if (b->type == bp_read_watchpoint ||
2510 b->type == bp_access_watchpoint)
2516 addr = target_stopped_data_address ();
2519 for (v = b->val_chain; v; v = v->next)
2521 if (VALUE_LVAL (v) == lval_memory
2522 && ! VALUE_LAZY (v))
2524 struct type *vtype = check_typedef (VALUE_TYPE (v));
2526 if (v == b->val_chain
2527 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
2528 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
2532 vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
2533 /* Exact match not required. Within range is
2535 if (addr >= vaddr &&
2536 addr < vaddr + TYPE_LENGTH (VALUE_TYPE (v)))
2542 switch (catch_errors (watchpoint_check, bs, message,
2546 /* We've already printed what needs to be printed. */
2547 bs->print_it = print_it_done;
2550 case WP_VALUE_CHANGED:
2551 if (b->type == bp_read_watchpoint)
2553 /* Don't stop: read watchpoints shouldn't fire if
2554 the value has changed. This is for targets which
2555 cannot set read-only watchpoints. */
2556 bs->print_it = print_it_noop;
2562 case WP_VALUE_NOT_CHANGED:
2569 /* Error from catch_errors. */
2570 printf_filtered ("Watchpoint %d deleted.\n", b->number);
2571 if (b->related_breakpoint)
2572 b->related_breakpoint->disposition = del_at_next_stop;
2573 b->disposition = del_at_next_stop;
2574 /* We've already printed what needs to be printed. */
2575 bs->print_it = print_it_done;
2578 else /* found == 0 */
2580 /* This is a case where some watchpoint(s) triggered,
2581 but not at the address of this watchpoint (FOUND
2582 was left zero). So don't print anything for this
2584 bs->print_it = print_it_noop;
2591 /* By definition, an encountered breakpoint is a triggered
2595 real_breakpoint = 1;
2599 b->frame != (get_current_frame ())->frame)
2603 int value_is_zero = 0;
2607 /* Need to select the frame, with all that implies
2608 so that the conditions will have the right context. */
2609 select_frame (get_current_frame (), 0);
2611 = catch_errors (breakpoint_cond_eval, (b->cond),
2612 "Error in testing breakpoint condition:\n",
2614 /* FIXME-someday, should give breakpoint # */
2617 if (b->cond && value_is_zero)
2620 /* Don't consider this a hit. */
2623 else if (b->ignore_count > 0)
2626 annotate_ignore_count_change ();
2631 /* We will stop here */
2632 if (b->disposition == disable)
2633 b->enable = disabled;
2634 bs->commands = b->commands;
2638 (STREQ ("silent", bs->commands->line) ||
2639 (xdb_commands && STREQ ("Q", bs->commands->line))))
2641 bs->commands = bs->commands->next;
2646 /* Print nothing for this entry if we dont stop or if we dont print. */
2647 if (bs->stop == 0 || bs->print == 0)
2648 bs->print_it = print_it_noop;
2651 bs->next = NULL; /* Terminate the chain */
2652 bs = root_bs->next; /* Re-grab the head of the chain */
2654 if (real_breakpoint && bs)
2656 if (bs->breakpoint_at->type == bp_hardware_breakpoint)
2658 if (DECR_PC_AFTER_HW_BREAK != 0)
2660 *pc = *pc - DECR_PC_AFTER_HW_BREAK;
2666 if (DECR_PC_AFTER_BREAK != 0 || must_shift_inst_regs)
2669 #if defined (SHIFT_INST_REGS)
2671 #else /* No SHIFT_INST_REGS. */
2673 #endif /* No SHIFT_INST_REGS. */
2678 /* The value of a hardware watchpoint hasn't changed, but the
2679 intermediate memory locations we are watching may have. */
2680 if (bs && !bs->stop &&
2681 (bs->breakpoint_at->type == bp_hardware_watchpoint ||
2682 bs->breakpoint_at->type == bp_read_watchpoint ||
2683 bs->breakpoint_at->type == bp_access_watchpoint))
2685 remove_breakpoints ();
2686 insert_breakpoints ();
2691 /* Tell what to do about this bpstat. */
2693 bpstat_what (bpstat bs)
2695 /* Classify each bpstat as one of the following. */
2698 /* This bpstat element has no effect on the main_action. */
2701 /* There was a watchpoint, stop but don't print. */
2704 /* There was a watchpoint, stop and print. */
2707 /* There was a breakpoint but we're not stopping. */
2710 /* There was a breakpoint, stop but don't print. */
2713 /* There was a breakpoint, stop and print. */
2716 /* We hit the longjmp breakpoint. */
2719 /* We hit the longjmp_resume breakpoint. */
2722 /* We hit the step_resume breakpoint. */
2725 /* We hit the through_sigtramp breakpoint. */
2728 /* We hit the shared library event breakpoint. */
2731 /* We caught a shared library event. */
2734 /* This is just used to count how many enums there are. */
2738 /* Here is the table which drives this routine. So that we can
2739 format it pretty, we define some abbreviations for the
2740 enum bpstat_what codes. */
2741 #define kc BPSTAT_WHAT_KEEP_CHECKING
2742 #define ss BPSTAT_WHAT_STOP_SILENT
2743 #define sn BPSTAT_WHAT_STOP_NOISY
2744 #define sgl BPSTAT_WHAT_SINGLE
2745 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2746 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2747 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2748 #define sr BPSTAT_WHAT_STEP_RESUME
2749 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2750 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2751 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2753 /* "Can't happen." Might want to print an error message.
2754 abort() is not out of the question, but chances are GDB is just
2755 a bit confused, not unusable. */
2756 #define err BPSTAT_WHAT_STOP_NOISY
2758 /* Given an old action and a class, come up with a new action. */
2759 /* One interesting property of this table is that wp_silent is the same
2760 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2761 after stopping, the check for whether to step over a breakpoint
2762 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2763 reference to how we stopped. We retain separate wp_silent and
2764 bp_silent codes in case we want to change that someday.
2766 Another possibly interesting property of this table is that
2767 there's a partial ordering, priority-like, of the actions. Once
2768 you've decided that some action is appropriate, you'll never go
2769 back and decide something of a lower priority is better. The
2772 kc < clr sgl shl shlr slr sn sr ss ts
2773 sgl < clrs shl shlr slr sn sr ss ts
2774 slr < err shl shlr sn sr ss ts
2775 clr < clrs err shl shlr sn sr ss ts
2776 clrs < err shl shlr sn sr ss ts
2777 ss < shl shlr sn sr ts
2784 What I think this means is that we don't need a damned table
2785 here. If you just put the rows and columns in the right order,
2786 it'd look awfully regular. We could simply walk the bpstat list
2787 and choose the highest priority action we find, with a little
2788 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
2789 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
2790 is messy anyway). */
2792 /* step_resume entries: a step resume breakpoint overrides another
2793 breakpoint of signal handling (see comment in wait_for_inferior
2794 at first IN_SIGTRAMP where we set the step_resume breakpoint). */
2795 /* We handle the through_sigtramp_breakpoint the same way; having both
2796 one of those and a step_resume_breakpoint is probably very rare (?). */
2798 static const enum bpstat_what_main_action
2799 table[(int) class_last][(int) BPSTAT_WHAT_LAST] =
2802 /* kc ss sn sgl slr clr clrs sr ts shl shlr
2805 {kc, ss, sn, sgl, slr, clr, clrs, sr, ts, shl, shlr},
2807 {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
2809 {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
2811 {sgl, ss, sn, sgl, slr, clrs, clrs, sr, ts, shl, shlr},
2813 {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
2815 {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
2817 {slr, ss, sn, slr, slr, err, err, sr, ts, shl, shlr},
2819 {clr, ss, sn, clrs, err, err, err, sr, ts, shl, shlr},
2821 {sr, sr, sr, sr, sr, sr, sr, sr, ts, shl, shlr},
2823 {ts, ts, ts, ts, ts, ts, ts, ts, ts, shl, shlr},
2825 {shl, shl, shl, shl, shl, shl, shl, shl, ts, shl, shlr},
2827 {shlr, shlr, shlr, shlr, shlr, shlr, shlr, shlr, ts, shlr, shlr}
2842 enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING;
2843 struct bpstat_what retval;
2845 retval.call_dummy = 0;
2846 for (; bs != NULL; bs = bs->next)
2848 enum class bs_class = no_effect;
2849 if (bs->breakpoint_at == NULL)
2850 /* I suspect this can happen if it was a momentary breakpoint
2851 which has since been deleted. */
2853 switch (bs->breakpoint_at->type)
2859 case bp_hardware_breakpoint:
2865 bs_class = bp_noisy;
2867 bs_class = bp_silent;
2870 bs_class = bp_nostop;
2873 case bp_hardware_watchpoint:
2874 case bp_read_watchpoint:
2875 case bp_access_watchpoint:
2879 bs_class = wp_noisy;
2881 bs_class = wp_silent;
2884 /* There was a watchpoint, but we're not stopping.
2885 This requires no further action. */
2886 bs_class = no_effect;
2889 bs_class = long_jump;
2891 case bp_longjmp_resume:
2892 bs_class = long_resume;
2894 case bp_step_resume:
2897 bs_class = step_resume;
2900 /* It is for the wrong frame. */
2901 bs_class = bp_nostop;
2903 case bp_through_sigtramp:
2904 bs_class = through_sig;
2906 case bp_watchpoint_scope:
2907 bs_class = bp_nostop;
2909 case bp_shlib_event:
2910 bs_class = shlib_event;
2912 case bp_thread_event:
2913 bs_class = bp_nostop;
2916 case bp_catch_unload:
2917 /* Only if this catchpoint triggered should we cause the
2918 step-out-of-dld behaviour. Otherwise, we ignore this
2921 bs_class = catch_shlib_event;
2923 bs_class = no_effect;
2926 case bp_catch_vfork:
2931 bs_class = bp_noisy;
2933 bs_class = bp_silent;
2936 /* There was a catchpoint, but we're not stopping.
2937 This requires no further action. */
2938 bs_class = no_effect;
2940 case bp_catch_catch:
2941 if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_CATCH)
2942 bs_class = bp_nostop;
2944 bs_class = bs->print ? bp_noisy : bp_silent;
2946 case bp_catch_throw:
2947 if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_THROW)
2948 bs_class = bp_nostop;
2950 bs_class = bs->print ? bp_noisy : bp_silent;
2953 /* Make sure the action is stop (silent or noisy),
2954 so infrun.c pops the dummy frame. */
2955 bs_class = bp_silent;
2956 retval.call_dummy = 1;
2959 current_action = table[(int) bs_class][(int) current_action];
2961 retval.main_action = current_action;
2965 /* Nonzero if we should step constantly (e.g. watchpoints on machines
2966 without hardware support). This isn't related to a specific bpstat,
2967 just to things like whether watchpoints are set. */
2970 bpstat_should_step (void)
2972 struct breakpoint *b;
2974 if (b->enable == enabled && b->type == bp_watchpoint)
2979 /* Nonzero if there are enabled hardware watchpoints. */
2981 bpstat_have_active_hw_watchpoints (void)
2983 struct breakpoint *b;
2985 if ((b->enable == enabled) &&
2987 ((b->type == bp_hardware_watchpoint) ||
2988 (b->type == bp_read_watchpoint) ||
2989 (b->type == bp_access_watchpoint)))
2995 /* Given a bpstat that records zero or more triggered eventpoints, this
2996 function returns another bpstat which contains only the catchpoints
2997 on that first list, if any. */
2999 bpstat_get_triggered_catchpoints (bpstat ep_list, bpstat *cp_list)
3001 struct bpstats root_bs[1];
3002 bpstat bs = root_bs;
3003 struct breakpoint *ep;
3006 bpstat_clear (cp_list);
3007 root_bs->next = NULL;
3009 for (; ep_list != NULL; ep_list = ep_list->next)
3011 /* Is this eventpoint a catchpoint? If not, ignore it. */
3012 ep = ep_list->breakpoint_at;
3015 if ((ep->type != bp_catch_load) &&
3016 (ep->type != bp_catch_unload) &&
3017 (ep->type != bp_catch_catch) &&
3018 (ep->type != bp_catch_throw))
3019 /* pai: (temp) ADD fork/vfork here!! */
3022 /* Yes; add it to the list. */
3023 bs = bpstat_alloc (ep, bs);
3028 #if defined(SOLIB_ADD)
3029 /* Also, for each triggered catchpoint, tag it with the name of
3030 the library that caused this trigger. (We copy the name now,
3031 because it's only guaranteed to be available NOW, when the
3032 catchpoint triggers. Clients who may wish to know the name
3033 later must get it from the catchpoint itself.) */
3034 if (ep->triggered_dll_pathname != NULL)
3035 xfree (ep->triggered_dll_pathname);
3036 if (ep->type == bp_catch_load)
3037 dll_pathname = SOLIB_LOADED_LIBRARY_PATHNAME (inferior_pid);
3039 dll_pathname = SOLIB_UNLOADED_LIBRARY_PATHNAME (inferior_pid);
3041 dll_pathname = NULL;
3045 ep->triggered_dll_pathname = (char *)
3046 xmalloc (strlen (dll_pathname) + 1);
3047 strcpy (ep->triggered_dll_pathname, dll_pathname);
3050 ep->triggered_dll_pathname = NULL;
3056 /* Print B to gdb_stdout. */
3058 print_one_breakpoint (struct breakpoint *b,
3059 CORE_ADDR *last_addr)
3061 register struct command_line *l;
3062 register struct symbol *sym;
3063 struct ep_type_description
3068 static struct ep_type_description bptypes[] =
3070 {bp_none, "?deleted?"},
3071 {bp_breakpoint, "breakpoint"},
3072 {bp_hardware_breakpoint, "hw breakpoint"},
3073 {bp_until, "until"},
3074 {bp_finish, "finish"},
3075 {bp_watchpoint, "watchpoint"},
3076 {bp_hardware_watchpoint, "hw watchpoint"},
3077 {bp_read_watchpoint, "read watchpoint"},
3078 {bp_access_watchpoint, "acc watchpoint"},
3079 {bp_longjmp, "longjmp"},
3080 {bp_longjmp_resume, "longjmp resume"},
3081 {bp_step_resume, "step resume"},
3082 {bp_through_sigtramp, "sigtramp"},
3083 {bp_watchpoint_scope, "watchpoint scope"},
3084 {bp_call_dummy, "call dummy"},
3085 {bp_shlib_event, "shlib events"},
3086 {bp_thread_event, "thread events"},
3087 {bp_catch_load, "catch load"},
3088 {bp_catch_unload, "catch unload"},
3089 {bp_catch_fork, "catch fork"},
3090 {bp_catch_vfork, "catch vfork"},
3091 {bp_catch_exec, "catch exec"},
3092 {bp_catch_catch, "catch catch"},
3093 {bp_catch_throw, "catch throw"}
3096 static char *bpdisps[] =
3097 {"del", "dstp", "dis", "keep"};
3098 static char bpenables[] = "nynny";
3099 char wrap_indent[80];
3101 struct ui_stream *stb = ui_out_stream_new (uiout);
3102 struct cleanup *old_chain = make_cleanup_ui_out_stream_delete (stb);
3107 ui_out_list_begin (uiout, "bkpt");
3113 ui_out_field_int (uiout, "number", b->number);
3115 printf_filtered ("%-3d ", b->number);
3120 if (((int) b->type > (sizeof (bptypes) / sizeof (bptypes[0])))
3121 || ((int) b->type != bptypes[(int) b->type].type))
3122 internal_error (__FILE__, __LINE__,
3123 "bptypes table does not describe type #%d.",
3126 ui_out_field_string (uiout, "type", bptypes[(int) b->type].description);
3128 printf_filtered ("%-14s ", bptypes[(int) b->type].description);
3134 ui_out_field_string (uiout, "disp", bpdisps[(int) b->disposition]);
3136 printf_filtered ("%-4s ", bpdisps[(int) b->disposition]);
3142 ui_out_field_fmt (uiout, "enabled", "%c", bpenables[(int) b->enable]);
3143 ui_out_spaces (uiout, 2);
3145 printf_filtered ("%-3c ", bpenables[(int) b->enable]);
3149 strcpy (wrap_indent, " ");
3151 strcat (wrap_indent, " ");
3155 internal_error (__FILE__, __LINE__,
3156 "print_one_breakpoint: bp_none encountered\n");
3160 case bp_hardware_watchpoint:
3161 case bp_read_watchpoint:
3162 case bp_access_watchpoint:
3163 /* Field 4, the address, is omitted (which makes the columns
3164 not line up too nicely with the headers, but the effect
3165 is relatively readable). */
3168 ui_out_field_skip (uiout, "addr");
3170 print_expression (b->exp, stb->stream);
3171 ui_out_field_stream (uiout, "what", stb);
3174 print_expression (b->exp, gdb_stdout);
3179 case bp_catch_unload:
3180 /* Field 4, the address, is omitted (which makes the columns
3181 not line up too nicely with the headers, but the effect
3182 is relatively readable). */
3185 ui_out_field_skip (uiout, "addr");
3187 if (b->dll_pathname == NULL)
3189 ui_out_field_string (uiout, "what", "<any library>");
3190 ui_out_spaces (uiout, 1);
3194 ui_out_text (uiout, "library \"");
3195 ui_out_field_string (uiout, "what", b->dll_pathname);
3196 ui_out_text (uiout, "\" ");
3200 if (b->dll_pathname == NULL)
3201 printf_filtered ("<any library> ");
3203 printf_filtered ("library \"%s\" ", b->dll_pathname);
3208 case bp_catch_vfork:
3209 /* Field 4, the address, is omitted (which makes the columns
3210 not line up too nicely with the headers, but the effect
3211 is relatively readable). */
3214 ui_out_field_skip (uiout, "addr");
3216 if (b->forked_inferior_pid != 0)
3218 ui_out_text (uiout, "process ");
3219 ui_out_field_int (uiout, "what", b->forked_inferior_pid);
3220 ui_out_spaces (uiout, 1);
3224 if (b->forked_inferior_pid != 0)
3225 printf_filtered ("process %d ", b->forked_inferior_pid);
3230 /* Field 4, the address, is omitted (which makes the columns
3231 not line up too nicely with the headers, but the effect
3232 is relatively readable). */
3235 ui_out_field_skip (uiout, "addr");
3237 if (b->exec_pathname != NULL)
3239 ui_out_text (uiout, "program \"");
3240 ui_out_field_string (uiout, "what", b->exec_pathname);
3241 ui_out_text (uiout, "\" ");
3245 if (b->exec_pathname != NULL)
3246 printf_filtered ("program \"%s\" ", b->exec_pathname);
3250 case bp_catch_catch:
3251 /* Field 4, the address, is omitted (which makes the columns
3252 not line up too nicely with the headers, but the effect
3253 is relatively readable). */
3256 ui_out_field_skip (uiout, "addr");
3258 ui_out_field_string (uiout, "what", "exception catch");
3259 ui_out_spaces (uiout, 1);
3262 printf_filtered ("exception catch ");
3266 case bp_catch_throw:
3267 /* Field 4, the address, is omitted (which makes the columns
3268 not line up too nicely with the headers, but the effect
3269 is relatively readable). */
3272 ui_out_field_skip (uiout, "addr");
3274 ui_out_field_string (uiout, "what", "exception throw");
3275 ui_out_spaces (uiout, 1);
3278 printf_filtered ("exception throw ");
3283 case bp_hardware_breakpoint:
3287 case bp_longjmp_resume:
3288 case bp_step_resume:
3289 case bp_through_sigtramp:
3290 case bp_watchpoint_scope:
3292 case bp_shlib_event:
3293 case bp_thread_event:
3298 ui_out_field_core_addr (uiout, "addr", b->address);
3301 *last_addr = b->address;
3304 sym = find_pc_sect_function (b->address, b->section);
3307 ui_out_text (uiout, "in ");
3308 ui_out_field_string (uiout, "func",
3309 SYMBOL_SOURCE_NAME (sym));
3310 ui_out_wrap_hint (uiout, wrap_indent);
3311 ui_out_text (uiout, " at ");
3313 ui_out_field_string (uiout, "file", b->source_file);
3314 ui_out_text (uiout, ":");
3315 ui_out_field_int (uiout, "line", b->line_number);
3319 print_address_symbolic (b->address, stb->stream, demangle, "");
3320 ui_out_field_stream (uiout, "at", stb);
3326 /* FIXME-32x64: need a print_address_numeric with
3328 printf_filtered ("%s ",
3329 local_hex_string_custom
3330 ((unsigned long) b->address, "08l"));
3333 *last_addr = b->address;
3336 sym = find_pc_sect_function (b->address, b->section);
3339 fputs_filtered ("in ", gdb_stdout);
3340 fputs_filtered (SYMBOL_SOURCE_NAME (sym), gdb_stdout);
3341 wrap_here (wrap_indent);
3342 fputs_filtered (" at ", gdb_stdout);
3344 fputs_filtered (b->source_file, gdb_stdout);
3345 printf_filtered (":%d", b->line_number);
3348 print_address_symbolic (b->address, gdb_stdout, demangle, " ");
3353 if (b->thread != -1)
3356 /* FIXME: This seems to be redundant and lost here; see the
3357 "stop only in" line a little further down. */
3358 ui_out_text (uiout, " thread ");
3359 ui_out_field_int (uiout, "thread", b->thread);
3361 printf_filtered (" thread %d", b->thread);
3366 ui_out_text (uiout, "\n");
3368 printf_filtered ("\n");
3375 ui_out_text (uiout, "\tstop only in stack frame at ");
3376 ui_out_field_core_addr (uiout, "frame", b->frame);
3377 ui_out_text (uiout, "\n");
3379 printf_filtered ("\tstop only in stack frame at ");
3380 print_address_numeric (b->frame, 1, gdb_stdout);
3381 printf_filtered ("\n");
3389 ui_out_text (uiout, "\tstop only if ");
3390 print_expression (b->cond, stb->stream);
3391 ui_out_field_stream (uiout, "cond", stb);
3392 ui_out_text (uiout, "\n");
3394 printf_filtered ("\tstop only if ");
3395 print_expression (b->cond, gdb_stdout);
3396 printf_filtered ("\n");
3400 if (b->thread != -1)
3402 /* FIXME should make an annotation for this */
3404 ui_out_text (uiout, "\tstop only in thread ");
3405 ui_out_field_int (uiout, "thread", b->thread);
3406 ui_out_text (uiout, "\n");
3408 printf_filtered ("\tstop only in thread %d\n", b->thread);
3412 if (show_breakpoint_hit_counts && b->hit_count)
3414 /* FIXME should make an annotation for this */
3416 if (ep_is_catchpoint (b))
3417 ui_out_text (uiout, "\tcatchpoint");
3419 ui_out_text (uiout, "\tbreakpoint");
3420 ui_out_text (uiout, " already hit ");
3421 ui_out_field_int (uiout, "times", b->hit_count);
3422 if (b->hit_count == 1)
3423 ui_out_text (uiout, " time\n");
3425 ui_out_text (uiout, " times\n");
3427 if (ep_is_catchpoint (b))
3428 printf_filtered ("\tcatchpoint");
3430 printf_filtered ("\tbreakpoint");
3431 printf_filtered (" already hit %d time%s\n",
3432 b->hit_count, (b->hit_count == 1 ? "" : "s"));
3437 /* Output the count also if it is zero, but only if this is
3438 mi. FIXME: Should have a better test for this. */
3439 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
3440 if (show_breakpoint_hit_counts && b->hit_count == 0)
3441 ui_out_field_int (uiout, "times", b->hit_count);
3444 if (b->ignore_count)
3448 ui_out_text (uiout, "\tignore next ");
3449 ui_out_field_int (uiout, "ignore", b->ignore_count);
3450 ui_out_text (uiout, " hits\n");
3452 printf_filtered ("\tignore next %d hits\n", b->ignore_count);
3456 if ((l = b->commands))
3460 ui_out_list_begin (uiout, "script");
3461 print_command_lines (uiout, l, 4);
3462 ui_out_list_end (uiout);
3466 print_command_line (l, 4, gdb_stdout);
3472 ui_out_list_end (uiout);
3473 do_cleanups (old_chain);
3477 struct captured_breakpoint_query_args
3483 do_captured_breakpoint_query (void *data)
3485 struct captured_breakpoint_query_args *args = data;
3486 register struct breakpoint *b;
3487 CORE_ADDR dummy_addr = 0;
3490 if (args->bnum == b->number)
3492 print_one_breakpoint (b, &dummy_addr);
3500 gdb_breakpoint_query (/* output object, */ int bnum)
3502 struct captured_breakpoint_query_args args;
3504 /* For the moment we don't trust print_one_breakpoint() to not throw
3506 return catch_errors (do_captured_breakpoint_query, &args,
3507 NULL, RETURN_MASK_ALL);
3510 /* Print information on breakpoint number BNUM, or -1 if all.
3511 If WATCHPOINTS is zero, process only breakpoints; if WATCHPOINTS
3512 is nonzero, process only watchpoints. */
3515 breakpoint_1 (int bnum, int allflag)
3517 register struct breakpoint *b;
3518 CORE_ADDR last_addr = (CORE_ADDR) -1;
3519 int found_a_breakpoint = 0;
3523 ui_out_table_begin (uiout, 6, "BreakpointTable");
3525 ui_out_table_begin (uiout, 5, "BreakpointTable");
3530 || bnum == b->number)
3532 /* We only print out user settable breakpoints unless the
3535 && b->type != bp_breakpoint
3536 && b->type != bp_catch_load
3537 && b->type != bp_catch_unload
3538 && b->type != bp_catch_fork
3539 && b->type != bp_catch_vfork
3540 && b->type != bp_catch_exec
3541 && b->type != bp_catch_catch
3542 && b->type != bp_catch_throw
3543 && b->type != bp_hardware_breakpoint
3544 && b->type != bp_watchpoint
3545 && b->type != bp_read_watchpoint
3546 && b->type != bp_access_watchpoint
3547 && b->type != bp_hardware_watchpoint)
3550 if (!found_a_breakpoint++)
3552 annotate_breakpoints_headers ();
3555 ui_out_table_header (uiout, 3, ui_left, "Num"); /* 1 */
3557 ui_out_table_header (uiout, 14, ui_left, "Type"); /* 2 */
3559 ui_out_table_header (uiout, 4, ui_left, "Disp"); /* 3 */
3561 ui_out_table_header (uiout, 3, ui_left, "Enb"); /* 4 */
3565 ui_out_table_header (uiout, 10, ui_left, "Address"); /* 5 */
3568 ui_out_table_header (uiout, 40, ui_noalign, "What"); /* 6 */
3569 ui_out_table_body (uiout);
3572 printf_filtered ("Num ");
3574 printf_filtered ("Type ");
3576 printf_filtered ("Disp ");
3578 printf_filtered ("Enb ");
3582 printf_filtered ("Address ");
3585 printf_filtered ("What\n");
3587 annotate_breakpoints_table ();
3590 print_one_breakpoint (b, &last_addr);
3593 if (!found_a_breakpoint)
3597 ui_out_message (uiout, 0, "No breakpoints or watchpoints.\n");
3599 ui_out_message (uiout, 0, "No breakpoint or watchpoint number %d.\n",
3603 printf_filtered ("No breakpoints or watchpoints.\n");
3605 printf_filtered ("No breakpoint or watchpoint number %d.\n", bnum);
3610 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3611 that a comparison of an unsigned with -1 is always false. */
3612 if (last_addr != (CORE_ADDR) -1)
3613 set_next_address (last_addr);
3617 ui_out_table_end (uiout);
3619 /* FIXME? Should this be moved up so that it is only called when
3620 there have been breakpoints? */
3621 annotate_breakpoints_table_end ();
3626 breakpoints_info (char *bnum_exp, int from_tty)
3631 bnum = parse_and_eval_long (bnum_exp);
3633 breakpoint_1 (bnum, 0);
3638 maintenance_info_breakpoints (char *bnum_exp, int from_tty)
3643 bnum = parse_and_eval_long (bnum_exp);
3645 breakpoint_1 (bnum, 1);
3648 /* Print a message describing any breakpoints set at PC. */
3651 describe_other_breakpoints (CORE_ADDR pc, asection *section)
3653 register int others = 0;
3654 register struct breakpoint *b;
3657 if (b->address == pc)
3658 if (overlay_debugging == 0 ||
3659 b->section == section)
3663 printf_filtered ("Note: breakpoint%s ", (others > 1) ? "s" : "");
3665 if (b->address == pc)
3666 if (overlay_debugging == 0 ||
3667 b->section == section)
3670 printf_filtered ("%d%s%s ",
3672 ((b->enable == disabled ||
3673 b->enable == shlib_disabled ||
3674 b->enable == call_disabled) ? " (disabled)"
3675 : b->enable == permanent ? " (permanent)"
3678 : ((others == 1) ? " and" : ""));
3680 printf_filtered ("also set at pc ");
3681 print_address_numeric (pc, 1, gdb_stdout);
3682 printf_filtered (".\n");
3686 /* Set the default place to put a breakpoint
3687 for the `break' command with no arguments. */
3690 set_default_breakpoint (int valid, CORE_ADDR addr, struct symtab *symtab,
3693 default_breakpoint_valid = valid;
3694 default_breakpoint_address = addr;
3695 default_breakpoint_symtab = symtab;
3696 default_breakpoint_line = line;
3699 /* Rescan breakpoints at address ADDRESS,
3700 marking the first one as "first" and any others as "duplicates".
3701 This is so that the bpt instruction is only inserted once.
3702 If we have a permanent breakpoint at ADDRESS, make that one
3703 the official one, and the rest as duplicates. */
3706 check_duplicates (CORE_ADDR address, asection *section)
3708 register struct breakpoint *b;
3709 register int count = 0;
3710 struct breakpoint *perm_bp = 0;
3712 if (address == 0) /* Watchpoints are uninteresting */
3716 if (b->enable != disabled
3717 && b->enable != shlib_disabled
3718 && b->enable != call_disabled
3719 && b->address == address
3720 && (overlay_debugging == 0 || b->section == section))
3722 /* Have we found a permanent breakpoint? */
3723 if (b->enable == permanent)
3730 b->duplicate = count > 1;
3733 /* If we found a permanent breakpoint at this address, go over the
3734 list again and declare all the other breakpoints there to be the
3738 perm_bp->duplicate = 0;
3740 /* Permanent breakpoint should always be inserted. */
3741 if (! perm_bp->inserted)
3742 internal_error (__FILE__, __LINE__,
3743 "allegedly permanent breakpoint is not "
3744 "actually inserted");
3750 internal_error (__FILE__, __LINE__,
3751 "another breakpoint was inserted on top of "
3752 "a permanent breakpoint");
3754 if (b->enable != disabled
3755 && b->enable != shlib_disabled
3756 && b->enable != call_disabled
3757 && b->address == address
3758 && (overlay_debugging == 0 || b->section == section))
3764 /* Low level routine to set a breakpoint.
3765 Takes as args the three things that every breakpoint must have.
3766 Returns the breakpoint object so caller can set other things.
3767 Does not set the breakpoint number!
3768 Does not print anything.
3770 ==> This routine should not be called if there is a chance of later
3771 error(); otherwise it leaves a bogus breakpoint on the chain. Validate
3772 your arguments BEFORE calling this routine! */
3775 set_raw_breakpoint (struct symtab_and_line sal)
3777 register struct breakpoint *b, *b1;
3779 b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint));
3780 memset (b, 0, sizeof (*b));
3781 b->address = sal.pc;
3782 if (sal.symtab == NULL)
3783 b->source_file = NULL;
3785 b->source_file = savestring (sal.symtab->filename,
3786 strlen (sal.symtab->filename));
3787 b->section = sal.section;
3788 b->language = current_language->la_language;
3789 b->input_radix = input_radix;
3791 b->line_number = sal.line;
3792 b->enable = enabled;
3795 b->ignore_count = 0;
3798 b->dll_pathname = NULL;
3799 b->triggered_dll_pathname = NULL;
3800 b->forked_inferior_pid = 0;
3801 b->exec_pathname = NULL;
3803 /* Add this breakpoint to the end of the chain
3804 so that a list of breakpoints will come out in order
3805 of increasing numbers. */
3807 b1 = breakpoint_chain;
3809 breakpoint_chain = b;
3817 check_duplicates (sal.pc, sal.section);
3818 breakpoints_changed ();
3824 /* Note that the breakpoint object B describes a permanent breakpoint
3825 instruction, hard-wired into the inferior's code. */
3827 make_breakpoint_permanent (struct breakpoint *b)
3829 b->enable = permanent;
3831 /* By definition, permanent breakpoints are already present in the code. */
3835 #ifdef GET_LONGJMP_TARGET
3838 create_longjmp_breakpoint (char *func_name)
3840 struct symtab_and_line sal;
3841 struct breakpoint *b;
3843 INIT_SAL (&sal); /* initialize to zeroes */
3844 if (func_name != NULL)
3846 struct minimal_symbol *m;
3848 m = lookup_minimal_symbol_text (func_name, NULL,
3849 (struct objfile *) NULL);
3851 sal.pc = SYMBOL_VALUE_ADDRESS (m);
3855 sal.section = find_pc_overlay (sal.pc);
3856 b = set_raw_breakpoint (sal);
3860 b->type = func_name != NULL ? bp_longjmp : bp_longjmp_resume;
3861 b->disposition = donttouch;
3862 b->enable = disabled;
3865 b->addr_string = xstrdup (func_name);
3866 b->number = internal_breakpoint_number--;
3869 #endif /* #ifdef GET_LONGJMP_TARGET */
3871 /* Call this routine when stepping and nexting to enable a breakpoint
3872 if we do a longjmp(). When we hit that breakpoint, call
3873 set_longjmp_resume_breakpoint() to figure out where we are going. */
3876 enable_longjmp_breakpoint (void)
3878 register struct breakpoint *b;
3881 if (b->type == bp_longjmp)
3883 b->enable = enabled;
3884 check_duplicates (b->address, b->section);
3889 disable_longjmp_breakpoint (void)
3891 register struct breakpoint *b;
3894 if (b->type == bp_longjmp
3895 || b->type == bp_longjmp_resume)
3897 b->enable = disabled;
3898 check_duplicates (b->address, b->section);
3903 create_thread_event_breakpoint (CORE_ADDR address)
3905 struct breakpoint *b;
3906 struct symtab_and_line sal;
3907 char addr_string[80]; /* Surely an addr can't be longer than that. */
3909 INIT_SAL (&sal); /* initialize to zeroes */
3911 sal.section = find_pc_overlay (sal.pc);
3912 if ((b = set_raw_breakpoint (sal)) == NULL)
3915 b->number = internal_breakpoint_number--;
3916 b->disposition = donttouch;
3917 b->type = bp_thread_event; /* XXX: do we need a new type?
3919 b->enable = enabled;
3920 /* addr_string has to be used or breakpoint_re_set will delete me. */
3921 sprintf (addr_string, "*0x%s", paddr (b->address));
3922 b->addr_string = xstrdup (addr_string);
3928 remove_thread_event_breakpoints (void)
3930 struct breakpoint *b, *temp;
3932 ALL_BREAKPOINTS_SAFE (b, temp)
3933 if (b->type == bp_thread_event)
3934 delete_breakpoint (b);
3939 remove_solib_event_breakpoints (void)
3941 register struct breakpoint *b, *temp;
3943 ALL_BREAKPOINTS_SAFE (b, temp)
3944 if (b->type == bp_shlib_event)
3945 delete_breakpoint (b);
3949 create_solib_event_breakpoint (CORE_ADDR address)
3951 struct breakpoint *b;
3952 struct symtab_and_line sal;
3954 INIT_SAL (&sal); /* initialize to zeroes */
3956 sal.section = find_pc_overlay (sal.pc);
3957 b = set_raw_breakpoint (sal);
3958 b->number = internal_breakpoint_number--;
3959 b->disposition = donttouch;
3960 b->type = bp_shlib_event;
3965 /* Disable any breakpoints that are on code in shared libraries. Only
3966 apply to enabled breakpoints, disabled ones can just stay disabled. */
3969 disable_breakpoints_in_shlibs (int silent)
3971 struct breakpoint *b;
3972 int disabled_shlib_breaks = 0;
3974 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
3977 #if defined (PC_SOLIB)
3978 if (((b->type == bp_breakpoint) ||
3979 (b->type == bp_hardware_breakpoint)) &&
3980 b->enable == enabled &&
3982 PC_SOLIB (b->address))
3984 b->enable = shlib_disabled;
3987 if (!disabled_shlib_breaks)
3989 target_terminal_ours_for_output ();
3990 warning ("Temporarily disabling shared library breakpoints:");
3992 disabled_shlib_breaks = 1;
3993 warning ("breakpoint #%d ", b->number);
4000 /* Try to reenable any breakpoints in shared libraries. */
4002 re_enable_breakpoints_in_shlibs (void)
4004 struct breakpoint *b;
4007 if (b->enable == shlib_disabled)
4011 /* Do not reenable the breakpoint if the shared library
4012 is still not mapped in. */
4013 if (target_read_memory (b->address, buf, 1) == 0)
4014 b->enable = enabled;
4021 solib_load_unload_1 (char *hookname, int tempflag, char *dll_pathname,
4022 char *cond_string, enum bptype bp_kind)
4024 struct breakpoint *b;
4025 struct symtabs_and_lines sals;
4026 struct cleanup *old_chain;
4027 struct cleanup *canonical_strings_chain = NULL;
4028 char *addr_start = hookname;
4029 char *addr_end = NULL;
4030 char **canonical = (char **) NULL;
4031 int thread = -1; /* All threads. */
4033 /* Set a breakpoint on the specified hook. */
4034 sals = decode_line_1 (&hookname, 1, (struct symtab *) NULL, 0, &canonical);
4035 addr_end = hookname;
4037 if (sals.nelts == 0)
4039 warning ("Unable to set a breakpoint on dynamic linker callback.");
4040 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4041 warning ("GDB will be unable to track shl_load/shl_unload calls");
4044 if (sals.nelts != 1)
4046 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4047 warning ("GDB will be unable to track shl_load/shl_unload calls");
4051 /* Make sure that all storage allocated in decode_line_1 gets freed
4052 in case the following errors out. */
4053 old_chain = make_cleanup (xfree, sals.sals);
4054 if (canonical != (char **) NULL)
4056 make_cleanup (xfree, canonical);
4057 canonical_strings_chain = make_cleanup (null_cleanup, 0);
4058 if (canonical[0] != NULL)
4059 make_cleanup (xfree, canonical[0]);
4062 resolve_sal_pc (&sals.sals[0]);
4064 /* Remove the canonical strings from the cleanup, they are needed below. */
4065 if (canonical != (char **) NULL)
4066 discard_cleanups (canonical_strings_chain);
4068 b = set_raw_breakpoint (sals.sals[0]);
4069 set_breakpoint_count (breakpoint_count + 1);
4070 b->number = breakpoint_count;
4072 b->cond_string = (cond_string == NULL) ?
4073 NULL : savestring (cond_string, strlen (cond_string));
4076 if (canonical != (char **) NULL && canonical[0] != NULL)
4077 b->addr_string = canonical[0];
4078 else if (addr_start)
4079 b->addr_string = savestring (addr_start, addr_end - addr_start);
4081 b->enable = enabled;
4082 b->disposition = tempflag ? del : donttouch;
4084 if (dll_pathname == NULL)
4085 b->dll_pathname = NULL;
4088 b->dll_pathname = (char *) xmalloc (strlen (dll_pathname) + 1);
4089 strcpy (b->dll_pathname, dll_pathname);
4094 do_cleanups (old_chain);
4098 create_solib_load_event_breakpoint (char *hookname, int tempflag,
4099 char *dll_pathname, char *cond_string)
4101 solib_load_unload_1 (hookname, tempflag, dll_pathname,
4102 cond_string, bp_catch_load);
4106 create_solib_unload_event_breakpoint (char *hookname, int tempflag,
4107 char *dll_pathname, char *cond_string)
4109 solib_load_unload_1 (hookname,tempflag, dll_pathname,
4110 cond_string, bp_catch_unload);
4114 create_fork_vfork_event_catchpoint (int tempflag, char *cond_string,
4115 enum bptype bp_kind)
4117 struct symtab_and_line sal;
4118 struct breakpoint *b;
4119 int thread = -1; /* All threads. */
4126 b = set_raw_breakpoint (sal);
4127 set_breakpoint_count (breakpoint_count + 1);
4128 b->number = breakpoint_count;
4130 b->cond_string = (cond_string == NULL) ?
4131 NULL : savestring (cond_string, strlen (cond_string));
4133 b->addr_string = NULL;
4134 b->enable = enabled;
4135 b->disposition = tempflag ? del : donttouch;
4136 b->forked_inferior_pid = 0;
4144 create_fork_event_catchpoint (int tempflag, char *cond_string)
4146 create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_fork);
4150 create_vfork_event_catchpoint (int tempflag, char *cond_string)
4152 create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_vfork);
4156 create_exec_event_catchpoint (int tempflag, char *cond_string)
4158 struct symtab_and_line sal;
4159 struct breakpoint *b;
4160 int thread = -1; /* All threads. */
4167 b = set_raw_breakpoint (sal);
4168 set_breakpoint_count (breakpoint_count + 1);
4169 b->number = breakpoint_count;
4171 b->cond_string = (cond_string == NULL) ?
4172 NULL : savestring (cond_string, strlen (cond_string));
4174 b->addr_string = NULL;
4175 b->enable = enabled;
4176 b->disposition = tempflag ? del : donttouch;
4178 b->type = bp_catch_exec;
4184 hw_breakpoint_used_count (void)
4186 register struct breakpoint *b;
4191 if (b->type == bp_hardware_breakpoint && b->enable == enabled)
4199 hw_watchpoint_used_count (enum bptype type, int *other_type_used)
4201 register struct breakpoint *b;
4204 *other_type_used = 0;
4207 if (b->enable == enabled)
4209 if (b->type == type)
4211 else if ((b->type == bp_hardware_watchpoint ||
4212 b->type == bp_read_watchpoint ||
4213 b->type == bp_access_watchpoint)
4214 && b->enable == enabled)
4215 *other_type_used = 1;
4221 /* Call this after hitting the longjmp() breakpoint. Use this to set
4222 a new breakpoint at the target of the jmp_buf.
4224 FIXME - This ought to be done by setting a temporary breakpoint
4225 that gets deleted automatically... */
4228 set_longjmp_resume_breakpoint (CORE_ADDR pc, struct frame_info *frame)
4230 register struct breakpoint *b;
4233 if (b->type == bp_longjmp_resume)
4236 b->enable = enabled;
4238 b->frame = frame->frame;
4241 check_duplicates (b->address, b->section);
4247 disable_watchpoints_before_interactive_call_start (void)
4249 struct breakpoint *b;
4253 if (((b->type == bp_watchpoint)
4254 || (b->type == bp_hardware_watchpoint)
4255 || (b->type == bp_read_watchpoint)
4256 || (b->type == bp_access_watchpoint)
4257 || ep_is_exception_catchpoint (b))
4258 && (b->enable == enabled))
4260 b->enable = call_disabled;
4261 check_duplicates (b->address, b->section);
4267 enable_watchpoints_after_interactive_call_stop (void)
4269 struct breakpoint *b;
4273 if (((b->type == bp_watchpoint)
4274 || (b->type == bp_hardware_watchpoint)
4275 || (b->type == bp_read_watchpoint)
4276 || (b->type == bp_access_watchpoint)
4277 || ep_is_exception_catchpoint (b))
4278 && (b->enable == call_disabled))
4280 b->enable = enabled;
4281 check_duplicates (b->address, b->section);
4287 /* Set a breakpoint that will evaporate an end of command
4288 at address specified by SAL.
4289 Restrict it to frame FRAME if FRAME is nonzero. */
4292 set_momentary_breakpoint (struct symtab_and_line sal, struct frame_info *frame,
4295 register struct breakpoint *b;
4296 b = set_raw_breakpoint (sal);
4298 b->enable = enabled;
4299 b->disposition = donttouch;
4300 b->frame = (frame ? frame->frame : 0);
4302 /* If we're debugging a multi-threaded program, then we
4303 want momentary breakpoints to be active in only a
4304 single thread of control. */
4305 if (in_thread_list (inferior_pid))
4306 b->thread = pid_to_thread_id (inferior_pid);
4312 /* Tell the user we have just set a breakpoint B. */
4315 mention (struct breakpoint *b)
4319 struct cleanup *old_chain;
4320 struct ui_stream *stb;
4322 stb = ui_out_stream_new (uiout);
4323 old_chain = make_cleanup_ui_out_stream_delete (stb);
4326 /* FIXME: This is misplaced; mention() is called by things (like hitting a
4327 watchpoint) other than breakpoint creation. It should be possible to
4328 clean this up and at the same time replace the random calls to
4329 breakpoint_changed with this hook, as has already been done for
4330 delete_breakpoint_hook and so on. */
4331 if (create_breakpoint_hook)
4332 create_breakpoint_hook (b);
4333 breakpoint_create_event (b->number);
4338 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b->number);
4342 ui_out_text (uiout, "Watchpoint ");
4343 ui_out_list_begin (uiout, "wpt");
4344 ui_out_field_int (uiout, "number", b->number);
4345 ui_out_text (uiout, ": ");
4346 print_expression (b->exp, stb->stream);
4347 ui_out_field_stream (uiout, "exp", stb);
4348 ui_out_list_end (uiout);
4350 case bp_hardware_watchpoint:
4351 ui_out_text (uiout, "Hardware watchpoint ");
4352 ui_out_list_begin (uiout, "wpt");
4353 ui_out_field_int (uiout, "number", b->number);
4354 ui_out_text (uiout, ": ");
4355 print_expression (b->exp, stb->stream);
4356 ui_out_field_stream (uiout, "exp", stb);
4357 ui_out_list_end (uiout);
4361 printf_filtered ("Watchpoint %d: ", b->number);
4362 print_expression (b->exp, gdb_stdout);
4364 case bp_hardware_watchpoint:
4365 printf_filtered ("Hardware watchpoint %d: ", b->number);
4366 print_expression (b->exp, gdb_stdout);
4370 case bp_read_watchpoint:
4371 ui_out_text (uiout, "Hardware read watchpoint ");
4372 ui_out_list_begin (uiout, "hw-rwpt");
4373 ui_out_field_int (uiout, "number", b->number);
4374 ui_out_text (uiout, ": ");
4375 print_expression (b->exp, stb->stream);
4376 ui_out_field_stream (uiout, "exp", stb);
4377 ui_out_list_end (uiout);
4379 case bp_access_watchpoint:
4380 ui_out_text (uiout, "Hardware access (read/write) watchpoint ");
4381 ui_out_list_begin (uiout, "hw-awpt");
4382 ui_out_field_int (uiout, "number", b->number);
4383 ui_out_text (uiout, ": ");
4384 print_expression (b->exp, stb->stream);
4385 ui_out_field_stream (uiout, "exp", stb);
4386 ui_out_list_end (uiout);
4389 case bp_read_watchpoint:
4390 printf_filtered ("Hardware read watchpoint %d: ", b->number);
4391 print_expression (b->exp, gdb_stdout);
4393 case bp_access_watchpoint:
4394 printf_filtered ("Hardware access (read/write) watchpoint %d: ",
4396 print_expression (b->exp, gdb_stdout);
4401 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
4407 printf_filtered ("Breakpoint %d", b->number);
4410 case bp_hardware_breakpoint:
4412 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
4418 printf_filtered ("Hardware assisted breakpoint %d", b->number);
4422 case bp_catch_unload:
4423 printf_filtered ("Catchpoint %d (%s %s)",
4425 (b->type == bp_catch_load) ? "load" : "unload",
4426 (b->dll_pathname != NULL) ?
4427 b->dll_pathname : "<any library>");
4430 case bp_catch_vfork:
4431 printf_filtered ("Catchpoint %d (%s)",
4433 (b->type == bp_catch_fork) ? "fork" : "vfork");
4436 printf_filtered ("Catchpoint %d (exec)",
4439 case bp_catch_catch:
4440 case bp_catch_throw:
4441 printf_filtered ("Catchpoint %d (%s)",
4443 (b->type == bp_catch_catch) ? "catch" : "throw");
4449 case bp_longjmp_resume:
4450 case bp_step_resume:
4451 case bp_through_sigtramp:
4453 case bp_watchpoint_scope:
4454 case bp_shlib_event:
4455 case bp_thread_event:
4460 if (addressprint || b->source_file == NULL)
4462 printf_filtered (" at ");
4463 print_address_numeric (b->address, 1, gdb_stdout);
4466 printf_filtered (": file %s, line %d.",
4467 b->source_file, b->line_number);
4468 TUIDO (((TuiOpaqueFuncPtr) tui_vAllSetHasBreakAt, b, 1));
4469 TUIDO (((TuiOpaqueFuncPtr) tuiUpdateAllExecInfos));
4472 do_cleanups (old_chain);
4475 if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
4478 printf_filtered ("\n");
4482 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4483 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4484 COND[i] and COND_STRING[i] values.
4486 NOTE: If the function succeeds, the caller is expected to cleanup
4487 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4488 array contents). If the function fails (error() is called), the
4489 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4490 COND and SALS arrays and each of those arrays contents. */
4493 create_breakpoints (struct symtabs_and_lines sals, char **addr_string,
4494 struct expression **cond, char **cond_string,
4495 enum bptype type, enum bpdisp disposition,
4496 int thread, int ignore_count, int from_tty)
4498 if (type == bp_hardware_breakpoint)
4500 int i = hw_breakpoint_used_count ();
4501 int target_resources_ok =
4502 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint,
4504 if (target_resources_ok == 0)
4505 error ("No hardware breakpoint support in the target.");
4506 else if (target_resources_ok < 0)
4507 error ("Hardware breakpoints used exceeds limit.");
4510 /* Now set all the breakpoints. */
4513 for (i = 0; i < sals.nelts; i++)
4515 struct breakpoint *b;
4516 struct symtab_and_line sal = sals.sals[i];
4519 describe_other_breakpoints (sal.pc, sal.section);
4521 b = set_raw_breakpoint (sal);
4522 set_breakpoint_count (breakpoint_count + 1);
4523 b->number = breakpoint_count;
4527 b->addr_string = addr_string[i];
4528 b->cond_string = cond_string[i];
4529 b->ignore_count = ignore_count;
4530 b->enable = enabled;
4531 b->disposition = disposition;
4537 /* Parse ARG which is assumed to be a SAL specification possibly
4538 followed by conditionals. On return, SALS contains an array of SAL
4539 addresses found. ADDR_STRING contains a vector of (canonical)
4540 address strings. ARG points to the end of the SAL. */
4543 parse_breakpoint_sals (char **address,
4544 struct symtabs_and_lines *sals,
4545 char ***addr_string)
4547 char *addr_start = *address;
4548 *addr_string = NULL;
4549 /* If no arg given, or if first arg is 'if ', use the default
4551 if ((*address) == NULL
4552 || (strncmp ((*address), "if", 2) == 0 && isspace ((*address)[2])))
4554 if (default_breakpoint_valid)
4556 struct symtab_and_line sal;
4557 INIT_SAL (&sal); /* initialize to zeroes */
4558 sals->sals = (struct symtab_and_line *)
4559 xmalloc (sizeof (struct symtab_and_line));
4560 sal.pc = default_breakpoint_address;
4561 sal.line = default_breakpoint_line;
4562 sal.symtab = default_breakpoint_symtab;
4563 sal.section = find_pc_overlay (sal.pc);
4564 sals->sals[0] = sal;
4568 error ("No default breakpoint address now.");
4572 /* Force almost all breakpoints to be in terms of the
4573 current_source_symtab (which is decode_line_1's default). This
4574 should produce the results we want almost all of the time while
4575 leaving default_breakpoint_* alone. */
4576 if (default_breakpoint_valid
4577 && (!current_source_symtab
4578 || (strchr ("+-", (*address)[0]) != NULL)))
4579 *sals = decode_line_1 (address, 1, default_breakpoint_symtab,
4580 default_breakpoint_line, addr_string);
4582 *sals = decode_line_1 (address, 1, (struct symtab *) NULL, 0, addr_string);
4584 /* For any SAL that didn't have a canonical string, fill one in. */
4585 if (sals->nelts > 0 && *addr_string == NULL)
4586 *addr_string = xcalloc (sals->nelts, sizeof (char **));
4587 if (addr_start != (*address))
4590 for (i = 0; i < sals->nelts; i++)
4592 /* Add the string if not present. */
4593 if ((*addr_string)[i] == NULL)
4594 (*addr_string)[i] = savestring (addr_start, (*address) - addr_start);
4600 /* Convert each SAL into a real PC. Verify that the PC can be
4601 inserted as a breakpoint. If it can't throw an error. */
4604 breakpoint_sals_to_pc (struct symtabs_and_lines *sals,
4608 for (i = 0; i < sals->nelts; i++)
4610 resolve_sal_pc (&sals->sals[i]);
4612 /* It's possible for the PC to be nonzero, but still an illegal
4613 value on some targets.
4615 For example, on HP-UX if you start gdb, and before running the
4616 inferior you try to set a breakpoint on a shared library function
4617 "foo" where the inferior doesn't call "foo" directly but does
4618 pass its address to another function call, then we do find a
4619 minimal symbol for the "foo", but it's address is invalid.
4620 (Appears to be an index into a table that the loader sets up
4621 when the inferior is run.)
4623 Give the target a chance to bless sals.sals[i].pc before we
4624 try to make a breakpoint for it. */
4625 if (PC_REQUIRES_RUN_BEFORE_USE (sals->sals[i].pc))
4627 if (address == NULL)
4628 error ("Cannot break without a running program.");
4630 error ("Cannot break on %s without a running program.",
4636 /* Set a breakpoint according to ARG (function, linenum or *address)
4637 flag: first bit : 0 non-temporary, 1 temporary.
4638 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
4641 break_command_1 (char *arg, int flag, int from_tty)
4643 int tempflag, hardwareflag;
4644 struct symtabs_and_lines sals;
4645 register struct expression **cond = 0;
4646 /* Pointers in arg to the start, and one past the end, of the
4648 char **cond_string = (char **) NULL;
4649 char *addr_start = arg;
4651 struct cleanup *old_chain;
4652 struct cleanup *breakpoint_chain = NULL;
4655 int ignore_count = 0;
4657 hardwareflag = flag & BP_HARDWAREFLAG;
4658 tempflag = flag & BP_TEMPFLAG;
4663 parse_breakpoint_sals (&arg, &sals, &addr_string);
4668 /* Create a chain of things that always need to be cleaned up. */
4669 old_chain = make_cleanup (null_cleanup, 0);
4671 /* Make sure that all storage allocated to SALS gets freed. */
4672 make_cleanup (xfree, sals.sals);
4674 /* Cleanup the addr_string array but not its contents. */
4675 make_cleanup (xfree, addr_string);
4677 /* Allocate space for all the cond expressions. */
4678 cond = xcalloc (sals.nelts, sizeof (struct expression *));
4679 make_cleanup (xfree, cond);
4681 /* Allocate space for all the cond strings. */
4682 cond_string = xcalloc (sals.nelts, sizeof (char **));
4683 make_cleanup (xfree, cond_string);
4685 /* ----------------------------- SNIP -----------------------------
4686 Anything added to the cleanup chain beyond this point is assumed
4687 to be part of a breakpoint. If the breakpoint create succeeds
4688 then the memory is not reclaimed. */
4689 breakpoint_chain = make_cleanup (null_cleanup, 0);
4691 /* Mark the contents of the addr_string for cleanup. These go on
4692 the breakpoint_chain and only occure if the breakpoint create
4694 for (i = 0; i < sals.nelts; i++)
4696 if (addr_string[i] != NULL)
4697 make_cleanup (xfree, addr_string[i]);
4700 /* Resolve all line numbers to PC's and verify that the addresses
4701 are ok for the target. */
4702 breakpoint_sals_to_pc (&sals, addr_start);
4704 /* Verify that condition can be parsed, before setting any
4705 breakpoints. Allocate a separate condition expression for each
4707 thread = -1; /* No specific thread yet */
4708 for (i = 0; i < sals.nelts; i++)
4715 char *cond_start = NULL;
4716 char *cond_end = NULL;
4717 while (*tok == ' ' || *tok == '\t')
4722 while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
4725 toklen = end_tok - tok;
4727 if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
4729 tok = cond_start = end_tok + 1;
4730 cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0);
4731 make_cleanup (xfree, cond[i]);
4733 cond_string[i] = savestring (cond_start, cond_end - cond_start);
4734 make_cleanup (xfree, cond_string[i]);
4736 else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0)
4742 thread = strtol (tok, &tok, 0);
4744 error ("Junk after thread keyword.");
4745 if (!valid_thread_id (thread))
4746 error ("Unknown thread %d\n", thread);
4749 error ("Junk at end of arguments.");
4753 create_breakpoints (sals, addr_string, cond, cond_string,
4754 hardwareflag ? bp_hardware_breakpoint : bp_breakpoint,
4755 tempflag ? del : donttouch,
4756 thread, ignore_count, from_tty);
4760 warning ("Multiple breakpoints were set.");
4761 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
4763 /* That's it. Discard the cleanups for data inserted into the
4765 discard_cleanups (breakpoint_chain);
4766 /* But cleanup everything else. */
4767 do_cleanups (old_chain);
4770 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
4771 linenum or *address) with COND and IGNORE_COUNT. */
4773 struct captured_breakpoint_args
4784 do_captured_breakpoint (void *data)
4786 struct captured_breakpoint_args *args = data;
4787 struct symtabs_and_lines sals;
4788 register struct expression **cond;
4789 struct cleanup *old_chain;
4790 struct cleanup *breakpoint_chain = NULL;
4797 /* Parse the source and lines spec. Delay check that the expression
4798 didn't contain trailing garbage until after cleanups are in
4802 address_end = args->address;
4804 parse_breakpoint_sals (&address_end, &sals, &addr_string);
4809 /* Create a chain of things at always need to be cleaned up. */
4810 old_chain = make_cleanup (null_cleanup, 0);
4812 /* Always have a addr_string array, even if it is empty. */
4813 make_cleanup (xfree, addr_string);
4815 /* Make sure that all storage allocated to SALS gets freed. */
4816 make_cleanup (xfree, sals.sals);
4818 /* Allocate space for all the cond expressions. */
4819 cond = xcalloc (sals.nelts, sizeof (struct expression *));
4820 make_cleanup (xfree, cond);
4822 /* Allocate space for all the cond strings. */
4823 cond_string = xcalloc (sals.nelts, sizeof (char **));
4824 make_cleanup (xfree, cond_string);
4826 /* ----------------------------- SNIP -----------------------------
4827 Anything added to the cleanup chain beyond this point is assumed
4828 to be part of a breakpoint. If the breakpoint create goes
4829 through then that memory is not cleaned up. */
4830 breakpoint_chain = make_cleanup (null_cleanup, 0);
4832 /* Mark the contents of the addr_string for cleanup. These go on
4833 the breakpoint_chain and only occure if the breakpoint create
4835 for (i = 0; i < sals.nelts; i++)
4837 if (addr_string[i] != NULL)
4838 make_cleanup (xfree, addr_string[i]);
4841 /* Wait until now before checking for garbage at the end of the
4842 address. That way cleanups can take care of freeing any
4844 if (*address_end != '\0')
4845 error ("Garbage %s following breakpoint address", address_end);
4847 /* Resolve all line numbers to PC's. */
4848 breakpoint_sals_to_pc (&sals, args->address);
4850 /* Verify that conditions can be parsed, before setting any
4852 for (i = 0; i < sals.nelts; i++)
4854 if (args->condition != NULL)
4856 char *tok = args->condition;
4857 cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0);
4859 error ("Garbage %s follows condition", tok);
4860 make_cleanup (xfree, cond[i]);
4861 cond_string[i] = xstrdup (args->condition);
4865 create_breakpoints (sals, addr_string, cond, cond_string,
4866 args->hardwareflag ? bp_hardware_breakpoint : bp_breakpoint,
4867 args->tempflag ? del : donttouch,
4868 args->thread, args->ignore_count, 0/*from-tty*/);
4870 /* That's it. Discard the cleanups for data inserted into the
4872 discard_cleanups (breakpoint_chain);
4873 /* But cleanup everything else. */
4874 do_cleanups (old_chain);
4879 gdb_breakpoint (char *address, char *condition,
4880 int hardwareflag, int tempflag,
4881 int thread, int ignore_count)
4883 struct captured_breakpoint_args args;
4884 args.address = address;
4885 args.condition = condition;
4886 args.hardwareflag = hardwareflag;
4887 args.tempflag = tempflag;
4888 args.thread = thread;
4889 args.ignore_count = ignore_count;
4890 return catch_errors (do_captured_breakpoint, &args,
4891 NULL, RETURN_MASK_ALL);
4896 break_at_finish_at_depth_command_1 (char *arg, int flag, int from_tty)
4898 struct frame_info *frame;
4899 CORE_ADDR low, high, selected_pc = 0;
4900 char *extra_args = NULL;
4903 int extra_args_len = 0, if_arg = 0;
4906 (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t')))
4909 if (default_breakpoint_valid)
4913 selected_pc = selected_frame->pc;
4918 error ("No selected frame.");
4921 error ("No default breakpoint address now.");
4925 extra_args = strchr (arg, ' ');
4929 extra_args_len = strlen (extra_args);
4930 level_arg = (char *) xmalloc (extra_args - arg);
4931 strncpy (level_arg, arg, extra_args - arg - 1);
4932 level_arg[extra_args - arg - 1] = '\0';
4936 level_arg = (char *) xmalloc (strlen (arg) + 1);
4937 strcpy (level_arg, arg);
4940 frame = parse_frame_specification (level_arg);
4942 selected_pc = frame->pc;
4949 extra_args_len = strlen (arg);
4954 if (find_pc_partial_function (selected_pc, (char **) NULL, &low, &high))
4956 addr_string = (char *) xmalloc (26 + extra_args_len);
4958 sprintf (addr_string, "*0x%s %s", paddr_nz (high), extra_args);
4960 sprintf (addr_string, "*0x%s", paddr_nz (high));
4961 break_command_1 (addr_string, flag, from_tty);
4962 xfree (addr_string);
4965 error ("No function contains the specified address");
4968 error ("Unable to set breakpoint at procedure exit");
4973 break_at_finish_command_1 (char *arg, int flag, int from_tty)
4975 char *addr_string, *break_string, *beg_addr_string;
4976 CORE_ADDR low, high;
4977 struct symtabs_and_lines sals;
4978 struct symtab_and_line sal;
4979 struct cleanup *old_chain;
4980 char *extra_args = NULL;
4981 int extra_args_len = 0;
4985 (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t')))
4987 if (default_breakpoint_valid)
4991 addr_string = (char *) xmalloc (15);
4992 sprintf (addr_string, "*0x%s", paddr_nz (selected_frame->pc));
4997 error ("No selected frame.");
5000 error ("No default breakpoint address now.");
5004 addr_string = (char *) xmalloc (strlen (arg) + 1);
5005 strcpy (addr_string, arg);
5011 extra_args_len = strlen (arg);
5015 /* get the stuff after the function name or address */
5016 extra_args = strchr (arg, ' ');
5020 extra_args_len = strlen (extra_args);
5027 beg_addr_string = addr_string;
5028 sals = decode_line_1 (&addr_string, 1, (struct symtab *) NULL, 0,
5031 xfree (beg_addr_string);
5032 old_chain = make_cleanup (xfree, sals.sals);
5033 for (i = 0; (i < sals.nelts); i++)
5036 if (find_pc_partial_function (sal.pc, (char **) NULL, &low, &high))
5038 break_string = (char *) xmalloc (extra_args_len + 26);
5040 sprintf (break_string, "*0x%s %s", paddr_nz (high), extra_args);
5042 sprintf (break_string, "*0x%s", paddr_nz (high));
5043 break_command_1 (break_string, flag, from_tty);
5044 xfree (break_string);
5047 error ("No function contains the specified address");
5051 warning ("Multiple breakpoints were set.\n");
5052 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5054 do_cleanups (old_chain);
5058 /* Helper function for break_command_1 and disassemble_command. */
5061 resolve_sal_pc (struct symtab_and_line *sal)
5065 if (sal->pc == 0 && sal->symtab != NULL)
5067 if (!find_line_pc (sal->symtab, sal->line, &pc))
5068 error ("No line %d in file \"%s\".",
5069 sal->line, sal->symtab->filename);
5073 if (sal->section == 0 && sal->symtab != NULL)
5075 struct blockvector *bv;
5080 bv = blockvector_for_pc_sect (sal->pc, 0, &index, sal->symtab);
5083 b = BLOCKVECTOR_BLOCK (bv, index);
5084 sym = block_function (b);
5087 fixup_symbol_section (sym, sal->symtab->objfile);
5088 sal->section = SYMBOL_BFD_SECTION (sym);
5092 /* It really is worthwhile to have the section, so we'll just
5093 have to look harder. This case can be executed if we have
5094 line numbers but no functions (as can happen in assembly
5097 struct minimal_symbol *msym;
5099 msym = lookup_minimal_symbol_by_pc (sal->pc);
5101 sal->section = SYMBOL_BFD_SECTION (msym);
5108 break_command (char *arg, int from_tty)
5110 break_command_1 (arg, 0, from_tty);
5114 break_at_finish_command (char *arg, int from_tty)
5116 break_at_finish_command_1 (arg, 0, from_tty);
5120 break_at_finish_at_depth_command (char *arg, int from_tty)
5122 break_at_finish_at_depth_command_1 (arg, 0, from_tty);
5126 tbreak_command (char *arg, int from_tty)
5128 break_command_1 (arg, BP_TEMPFLAG, from_tty);
5132 tbreak_at_finish_command (char *arg, int from_tty)
5134 break_at_finish_command_1 (arg, BP_TEMPFLAG, from_tty);
5138 hbreak_command (char *arg, int from_tty)
5140 break_command_1 (arg, BP_HARDWAREFLAG, from_tty);
5144 thbreak_command (char *arg, int from_tty)
5146 break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty);
5150 stop_command (char *arg, int from_tty)
5152 printf_filtered ("Specify the type of breakpoint to set.\n\
5153 Usage: stop in <function | address>\n\
5158 stopin_command (char *arg, int from_tty)
5162 if (arg == (char *) NULL)
5164 else if (*arg != '*')
5169 /* look for a ':'. If this is a line number specification, then
5170 say it is bad, otherwise, it should be an address or
5171 function/method name */
5172 while (*argptr && !hasColon)
5174 hasColon = (*argptr == ':');
5179 badInput = (*argptr != ':'); /* Not a class::method */
5181 badInput = isdigit (*arg); /* a simple line number */
5185 printf_filtered ("Usage: stop in <function | address>\n");
5187 break_command_1 (arg, 0, from_tty);
5191 stopat_command (char *arg, int from_tty)
5195 if (arg == (char *) NULL || *arg == '*') /* no line number */
5202 /* look for a ':'. If there is a '::' then get out, otherwise
5203 it is probably a line number. */
5204 while (*argptr && !hasColon)
5206 hasColon = (*argptr == ':');
5211 badInput = (*argptr == ':'); /* we have class::method */
5213 badInput = !isdigit (*arg); /* not a line number */
5217 printf_filtered ("Usage: stop at <line>\n");
5219 break_command_1 (arg, 0, from_tty);
5223 /* accessflag: hw_write: watch write,
5224 hw_read: watch read,
5225 hw_access: watch access (read or write) */
5227 watch_command_1 (char *arg, int accessflag, int from_tty)
5229 struct breakpoint *b;
5230 struct symtab_and_line sal;
5231 struct expression *exp;
5232 struct block *exp_valid_block;
5233 struct value *val, *mark;
5234 struct frame_info *frame;
5235 struct frame_info *prev_frame = NULL;
5236 char *exp_start = NULL;
5237 char *exp_end = NULL;
5238 char *tok, *end_tok;
5240 char *cond_start = NULL;
5241 char *cond_end = NULL;
5242 struct expression *cond = NULL;
5243 int i, other_type_used, target_resources_ok = 0;
5244 enum bptype bp_type;
5247 INIT_SAL (&sal); /* initialize to zeroes */
5249 /* Parse arguments. */
5250 innermost_block = NULL;
5252 exp = parse_exp_1 (&arg, 0, 0);
5254 exp_valid_block = innermost_block;
5255 mark = value_mark ();
5256 val = evaluate_expression (exp);
5257 release_value (val);
5258 if (VALUE_LAZY (val))
5259 value_fetch_lazy (val);
5262 while (*tok == ' ' || *tok == '\t')
5266 while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
5269 toklen = end_tok - tok;
5270 if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
5272 tok = cond_start = end_tok + 1;
5273 cond = parse_exp_1 (&tok, 0, 0);
5277 error ("Junk at end of command.");
5279 if (accessflag == hw_read)
5280 bp_type = bp_read_watchpoint;
5281 else if (accessflag == hw_access)
5282 bp_type = bp_access_watchpoint;
5284 bp_type = bp_hardware_watchpoint;
5286 mem_cnt = can_use_hardware_watchpoint (val);
5287 if (mem_cnt == 0 && bp_type != bp_hardware_watchpoint)
5288 error ("Expression cannot be implemented with read/access watchpoint.");
5291 i = hw_watchpoint_used_count (bp_type, &other_type_used);
5292 target_resources_ok =
5293 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type, i + mem_cnt,
5295 if (target_resources_ok == 0 && bp_type != bp_hardware_watchpoint)
5296 error ("Target does not support this type of hardware watchpoint.");
5298 if (target_resources_ok < 0 && bp_type != bp_hardware_watchpoint)
5299 error ("Target can only support one kind of HW watchpoint at a time.");
5302 #if defined(HPUXHPPA)
5303 /* On HP-UX if you set a h/w
5304 watchpoint before the "run" command, the inferior dies with a e.g.,
5305 SIGILL once you start it. I initially believed this was due to a
5306 bad interaction between page protection traps and the initial
5307 startup sequence by the dynamic linker.
5309 However, I tried avoiding that by having HP-UX's implementation of
5310 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_pid
5311 yet, which forced slow watches before a "run" or "attach", and it
5312 still fails somewhere in the startup code.
5314 Until I figure out what's happening, I'm disallowing watches altogether
5315 before the "run" or "attach" command. We'll tell the user they must
5316 set watches after getting the program started. */
5317 if (!target_has_execution)
5319 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5322 #endif /* HPUXHPPA */
5324 /* Now set up the breakpoint. */
5325 b = set_raw_breakpoint (sal);
5326 set_breakpoint_count (breakpoint_count + 1);
5327 b->number = breakpoint_count;
5328 b->disposition = donttouch;
5330 b->exp_valid_block = exp_valid_block;
5331 b->exp_string = savestring (exp_start, exp_end - exp_start);
5335 b->cond_string = savestring (cond_start, cond_end - cond_start);
5339 frame = block_innermost_frame (exp_valid_block);
5342 prev_frame = get_prev_frame (frame);
5343 b->watchpoint_frame = frame->frame;
5346 b->watchpoint_frame = (CORE_ADDR) 0;
5348 if (mem_cnt && target_resources_ok > 0)
5351 b->type = bp_watchpoint;
5353 /* If the expression is "local", then set up a "watchpoint scope"
5354 breakpoint at the point where we've left the scope of the watchpoint
5356 if (innermost_block)
5360 struct breakpoint *scope_breakpoint;
5361 struct symtab_and_line scope_sal;
5363 INIT_SAL (&scope_sal); /* initialize to zeroes */
5364 scope_sal.pc = get_frame_pc (prev_frame);
5365 scope_sal.section = find_pc_overlay (scope_sal.pc);
5367 scope_breakpoint = set_raw_breakpoint (scope_sal);
5368 set_breakpoint_count (breakpoint_count + 1);
5369 scope_breakpoint->number = breakpoint_count;
5371 scope_breakpoint->type = bp_watchpoint_scope;
5372 scope_breakpoint->enable = enabled;
5374 /* Automatically delete the breakpoint when it hits. */
5375 scope_breakpoint->disposition = del;
5377 /* Only break in the proper frame (help with recursion). */
5378 scope_breakpoint->frame = prev_frame->frame;
5380 /* Set the address at which we will stop. */
5381 scope_breakpoint->address = get_frame_pc (prev_frame);
5383 /* The scope breakpoint is related to the watchpoint. We
5384 will need to act on them together. */
5385 b->related_breakpoint = scope_breakpoint;
5388 value_free_to_mark (mark);
5392 /* Return count of locations need to be watched and can be handled
5393 in hardware. If the watchpoint can not be handled
5394 in hardware return zero. */
5396 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
5397 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
5398 ((BYTE_SIZE) <= (REGISTER_SIZE))
5401 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5402 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5403 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5407 can_use_hardware_watchpoint (struct value *v)
5409 int found_memory_cnt = 0;
5410 struct value *head = v;
5412 /* Did the user specifically forbid us to use hardware watchpoints? */
5413 if (!can_use_hw_watchpoints)
5416 /* Make sure that the value of the expression depends only upon
5417 memory contents, and values computed from them within GDB. If we
5418 find any register references or function calls, we can't use a
5419 hardware watchpoint.
5421 The idea here is that evaluating an expression generates a series
5422 of values, one holding the value of every subexpression. (The
5423 expression a*b+c has five subexpressions: a, b, a*b, c, and
5424 a*b+c.) GDB's values hold almost enough information to establish
5425 the criteria given above --- they identify memory lvalues,
5426 register lvalues, computed values, etcetera. So we can evaluate
5427 the expression, and then scan the chain of values that leaves
5428 behind to decide whether we can detect any possible change to the
5429 expression's final value using only hardware watchpoints.
5431 However, I don't think that the values returned by inferior
5432 function calls are special in any way. So this function may not
5433 notice that an expression involving an inferior function call
5434 can't be watched with hardware watchpoints. FIXME. */
5435 for (; v; v = v->next)
5437 if (VALUE_LVAL (v) == lval_memory)
5440 /* A lazy memory lvalue is one that GDB never needed to fetch;
5441 we either just used its address (e.g., `a' in `a.b') or
5442 we never needed it at all (e.g., `a' in `a,b'). */
5446 /* Ahh, memory we actually used! Check if we can cover
5447 it with hardware watchpoints. */
5448 struct type *vtype = check_typedef (VALUE_TYPE (v));
5450 /* We only watch structs and arrays if user asked for it
5451 explicitly, never if they just happen to appear in a
5452 middle of some value chain. */
5454 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
5455 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
5457 CORE_ADDR vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
5458 int len = TYPE_LENGTH (VALUE_TYPE (v));
5460 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr, len))
5467 else if (v->lval != not_lval && v->modifiable == 0)
5468 return 0; /* ??? What does this represent? */
5469 else if (v->lval == lval_register)
5470 return 0; /* cannot watch a register with a HW watchpoint */
5473 /* The expression itself looks suitable for using a hardware
5474 watchpoint, but give the target machine a chance to reject it. */
5475 return found_memory_cnt;
5480 watch_command_wrapper (char *arg, int from_tty)
5482 watch_command (arg, from_tty);
5486 watch_command (char *arg, int from_tty)
5488 watch_command_1 (arg, hw_write, from_tty);
5493 rwatch_command_wrapper (char *arg, int from_tty)
5495 rwatch_command (arg, from_tty);
5499 rwatch_command (char *arg, int from_tty)
5501 watch_command_1 (arg, hw_read, from_tty);
5506 awatch_command_wrapper (char *arg, int from_tty)
5508 awatch_command (arg, from_tty);
5512 awatch_command (char *arg, int from_tty)
5514 watch_command_1 (arg, hw_access, from_tty);
5518 /* Helper routines for the until_command routine in infcmd.c. Here
5519 because it uses the mechanisms of breakpoints. */
5521 /* This function is called by fetch_inferior_event via the
5522 cmd_continuation pointer, to complete the until command. It takes
5523 care of cleaning up the temporary breakpoints set up by the until
5526 until_break_command_continuation (struct continuation_arg *arg)
5528 struct cleanup *cleanups;
5530 cleanups = (struct cleanup *) arg->data.pointer;
5531 do_exec_cleanups (cleanups);
5536 until_break_command (char *arg, int from_tty)
5538 struct symtabs_and_lines sals;
5539 struct symtab_and_line sal;
5540 struct frame_info *prev_frame = get_prev_frame (selected_frame);
5541 struct breakpoint *breakpoint;
5542 struct cleanup *old_chain;
5543 struct continuation_arg *arg1;
5546 clear_proceed_status ();
5548 /* Set a breakpoint where the user wants it and at return from
5551 if (default_breakpoint_valid)
5552 sals = decode_line_1 (&arg, 1, default_breakpoint_symtab,
5553 default_breakpoint_line, (char ***) NULL);
5555 sals = decode_line_1 (&arg, 1, (struct symtab *) NULL,
5556 0, (char ***) NULL);
5558 if (sals.nelts != 1)
5559 error ("Couldn't get information on specified line.");
5562 xfree (sals.sals); /* malloc'd, so freed */
5565 error ("Junk at end of arguments.");
5567 resolve_sal_pc (&sal);
5569 breakpoint = set_momentary_breakpoint (sal, selected_frame, bp_until);
5571 if (!event_loop_p || !target_can_async_p ())
5572 old_chain = make_cleanup_delete_breakpoint (breakpoint);
5574 old_chain = make_exec_cleanup_delete_breakpoint (breakpoint);
5576 /* If we are running asynchronously, and the target supports async
5577 execution, we are not waiting for the target to stop, in the call
5578 tp proceed, below. This means that we cannot delete the
5579 brekpoints until the target has actually stopped. The only place
5580 where we get a chance to do that is in fetch_inferior_event, so
5581 we must set things up for that. */
5583 if (event_loop_p && target_can_async_p ())
5585 /* In this case the arg for the continuation is just the point
5586 in the exec_cleanups chain from where to start doing
5587 cleanups, because all the continuation does is the cleanups in
5588 the exec_cleanup_chain. */
5590 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
5592 arg1->data.pointer = old_chain;
5594 add_continuation (until_break_command_continuation, arg1);
5597 /* Keep within the current frame */
5601 sal = find_pc_line (prev_frame->pc, 0);
5602 sal.pc = prev_frame->pc;
5603 breakpoint = set_momentary_breakpoint (sal, prev_frame, bp_until);
5604 if (!event_loop_p || !target_can_async_p ())
5605 make_cleanup_delete_breakpoint (breakpoint);
5607 make_exec_cleanup_delete_breakpoint (breakpoint);
5610 proceed (-1, TARGET_SIGNAL_DEFAULT, 0);
5611 /* Do the cleanups now, anly if we are not running asynchronously,
5612 of if we are, but the target is still synchronous. */
5613 if (!event_loop_p || !target_can_async_p ())
5614 do_cleanups (old_chain);
5618 /* These aren't used; I don't konw what they were for. */
5619 /* Set a breakpoint at the catch clause for NAME. */
5621 catch_breakpoint (char *name)
5626 disable_catch_breakpoint (void)
5631 delete_catch_breakpoint (void)
5636 enable_catch_breakpoint (void)
5643 struct sal_chain *next;
5644 struct symtab_and_line sal;
5648 /* Not really used -- invocation in handle_gnu_4_16_catch_command
5649 had been commented out in the v.4.16 sources, and stays
5650 disabled there now because "catch NAME" syntax isn't allowed.
5652 /* This isn't used; I don't know what it was for. */
5653 /* For each catch clause identified in ARGS, run FUNCTION
5654 with that clause as an argument. */
5655 static struct symtabs_and_lines
5656 map_catch_names (char *args, int (*function) ())
5658 register char *p = args;
5660 struct symtabs_and_lines sals;
5662 struct sal_chain *sal_chain = 0;
5666 error_no_arg ("one or more catch names");
5674 /* Don't swallow conditional part. */
5675 if (p1[0] == 'i' && p1[1] == 'f'
5676 && (p1[2] == ' ' || p1[2] == '\t'))
5682 while (isalnum (*p1) || *p1 == '_' || *p1 == '$')
5686 if (*p1 && *p1 != ' ' && *p1 != '\t')
5687 error ("Arguments must be catch names.");
5693 struct sal_chain *next = (struct sal_chain *)
5694 alloca (sizeof (struct sal_chain));
5695 next->next = sal_chain;
5696 next->sal = get_catch_sal (p);
5701 printf_unfiltered ("No catch clause for exception %s.\n", p);
5706 while (*p == ' ' || *p == '\t')
5712 /* This shares a lot of code with `print_frame_label_vars' from stack.c. */
5714 static struct symtabs_and_lines
5715 get_catch_sals (int this_level_only)
5717 register struct blockvector *bl;
5718 register struct block *block;
5719 int index, have_default = 0;
5721 struct symtabs_and_lines sals;
5722 struct sal_chain *sal_chain = 0;
5723 char *blocks_searched;
5725 /* Not sure whether an error message is always the correct response,
5726 but it's better than a core dump. */
5727 if (selected_frame == NULL)
5728 error ("No selected frame.");
5729 block = get_frame_block (selected_frame);
5730 pc = selected_frame->pc;
5736 error ("No symbol table info available.\n");
5738 bl = blockvector_for_pc (BLOCK_END (block) - 4, &index);
5739 blocks_searched = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
5740 memset (blocks_searched, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
5744 CORE_ADDR end = BLOCK_END (block) - 4;
5747 if (bl != blockvector_for_pc (end, &index))
5748 error ("blockvector blotch");
5749 if (BLOCKVECTOR_BLOCK (bl, index) != block)
5750 error ("blockvector botch");
5751 last_index = BLOCKVECTOR_NBLOCKS (bl);
5754 /* Don't print out blocks that have gone by. */
5755 while (index < last_index
5756 && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc)
5759 while (index < last_index
5760 && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end)
5762 if (blocks_searched[index] == 0)
5764 struct block *b = BLOCKVECTOR_BLOCK (bl, index);
5767 register struct symbol *sym;
5769 nsyms = BLOCK_NSYMS (b);
5771 for (i = 0; i < nsyms; i++)
5773 sym = BLOCK_SYM (b, i);
5774 if (STREQ (SYMBOL_NAME (sym), "default"))
5780 if (SYMBOL_CLASS (sym) == LOC_LABEL)
5782 struct sal_chain *next = (struct sal_chain *)
5783 alloca (sizeof (struct sal_chain));
5784 next->next = sal_chain;
5785 next->sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym),
5790 blocks_searched[index] = 1;
5796 if (sal_chain && this_level_only)
5799 /* After handling the function's top-level block, stop.
5800 Don't continue to its superblock, the block of
5801 per-file symbols. */
5802 if (BLOCK_FUNCTION (block))
5804 block = BLOCK_SUPERBLOCK (block);
5809 struct sal_chain *tmp_chain;
5811 /* Count the number of entries. */
5812 for (index = 0, tmp_chain = sal_chain; tmp_chain;
5813 tmp_chain = tmp_chain->next)
5817 sals.sals = (struct symtab_and_line *)
5818 xmalloc (index * sizeof (struct symtab_and_line));
5819 for (index = 0; sal_chain; sal_chain = sal_chain->next, index++)
5820 sals.sals[index] = sal_chain->sal;
5827 ep_skip_leading_whitespace (char **s)
5829 if ((s == NULL) || (*s == NULL))
5831 while (isspace (**s))
5835 /* This function examines a string, and attempts to find a token
5836 that might be an event name in the leading characters. If a
5837 possible match is found, a pointer to the last character of
5838 the token is returned. Else, NULL is returned. */
5841 ep_find_event_name_end (char *arg)
5844 char *event_name_end = NULL;
5846 /* If we could depend upon the presense of strrpbrk, we'd use that... */
5850 /* We break out of the loop when we find a token delimiter.
5851 Basically, we're looking for alphanumerics and underscores;
5852 anything else delimites the token. */
5855 if (!isalnum (*s) && (*s != '_'))
5861 return event_name_end;
5865 /* This function attempts to parse an optional "if <cond>" clause
5866 from the arg string. If one is not found, it returns NULL.
5868 Else, it returns a pointer to the condition string. (It does not
5869 attempt to evaluate the string against a particular block.) And,
5870 it updates arg to point to the first character following the parsed
5871 if clause in the arg string. */
5874 ep_parse_optional_if_clause (char **arg)
5878 if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace ((*arg)[2]))
5881 /* Skip the "if" keyword. */
5884 /* Skip any extra leading whitespace, and record the start of the
5885 condition string. */
5886 ep_skip_leading_whitespace (arg);
5889 /* Assume that the condition occupies the remainder of the arg string. */
5890 (*arg) += strlen (cond_string);
5895 /* This function attempts to parse an optional filename from the arg
5896 string. If one is not found, it returns NULL.
5898 Else, it returns a pointer to the parsed filename. (This function
5899 makes no attempt to verify that a file of that name exists, or is
5900 accessible.) And, it updates arg to point to the first character
5901 following the parsed filename in the arg string.
5903 Note that clients needing to preserve the returned filename for
5904 future access should copy it to their own buffers. */
5906 ep_parse_optional_filename (char **arg)
5908 static char filename[1024];
5913 if ((*arg_p == '\0') || isspace (*arg_p))
5931 /* Commands to deal with catching events, such as signals, exceptions,
5932 process start/exit, etc. */
5936 catch_fork, catch_vfork
5940 #if defined(CHILD_INSERT_FORK_CATCHPOINT) || defined(CHILD_INSERT_VFORK_CATCHPOINT)
5941 static void catch_fork_command_1 (catch_fork_kind fork_kind,
5942 char *arg, int tempflag, int from_tty);
5945 catch_fork_command_1 (catch_fork_kind fork_kind, char *arg, int tempflag,
5948 char *cond_string = NULL;
5950 ep_skip_leading_whitespace (&arg);
5952 /* The allowed syntax is:
5954 catch [v]fork if <cond>
5956 First, check if there's an if clause. */
5957 cond_string = ep_parse_optional_if_clause (&arg);
5959 if ((*arg != '\0') && !isspace (*arg))
5960 error ("Junk at end of arguments.");
5962 /* If this target supports it, create a fork or vfork catchpoint
5963 and enable reporting of such events. */
5967 create_fork_event_catchpoint (tempflag, cond_string);
5970 create_vfork_event_catchpoint (tempflag, cond_string);
5973 error ("unsupported or unknown fork kind; cannot catch it");
5979 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
5981 catch_exec_command_1 (char *arg, int tempflag, int from_tty)
5983 char *cond_string = NULL;
5985 ep_skip_leading_whitespace (&arg);
5987 /* The allowed syntax is:
5989 catch exec if <cond>
5991 First, check if there's an if clause. */
5992 cond_string = ep_parse_optional_if_clause (&arg);
5994 if ((*arg != '\0') && !isspace (*arg))
5995 error ("Junk at end of arguments.");
5997 /* If this target supports it, create an exec catchpoint
5998 and enable reporting of such events. */
5999 create_exec_event_catchpoint (tempflag, cond_string);
6003 #if defined(SOLIB_ADD)
6005 catch_load_command_1 (char *arg, int tempflag, int from_tty)
6007 char *dll_pathname = NULL;
6008 char *cond_string = NULL;
6010 ep_skip_leading_whitespace (&arg);
6012 /* The allowed syntax is:
6014 catch load if <cond>
6015 catch load <filename>
6016 catch load <filename> if <cond>
6018 The user is not allowed to specify the <filename> after an
6021 We'll ignore the pathological case of a file named "if".
6023 First, check if there's an if clause. If so, then there
6024 cannot be a filename. */
6025 cond_string = ep_parse_optional_if_clause (&arg);
6027 /* If there was an if clause, then there cannot be a filename.
6028 Else, there might be a filename and an if clause. */
6029 if (cond_string == NULL)
6031 dll_pathname = ep_parse_optional_filename (&arg);
6032 ep_skip_leading_whitespace (&arg);
6033 cond_string = ep_parse_optional_if_clause (&arg);
6036 if ((*arg != '\0') && !isspace (*arg))
6037 error ("Junk at end of arguments.");
6039 /* Create a load breakpoint that only triggers when a load of
6040 the specified dll (or any dll, if no pathname was specified)
6042 SOLIB_CREATE_CATCH_LOAD_HOOK (inferior_pid, tempflag,
6043 dll_pathname, cond_string);
6047 catch_unload_command_1 (char *arg, int tempflag, int from_tty)
6049 char *dll_pathname = NULL;
6050 char *cond_string = NULL;
6052 ep_skip_leading_whitespace (&arg);
6054 /* The allowed syntax is:
6056 catch unload if <cond>
6057 catch unload <filename>
6058 catch unload <filename> if <cond>
6060 The user is not allowed to specify the <filename> after an
6063 We'll ignore the pathological case of a file named "if".
6065 First, check if there's an if clause. If so, then there
6066 cannot be a filename. */
6067 cond_string = ep_parse_optional_if_clause (&arg);
6069 /* If there was an if clause, then there cannot be a filename.
6070 Else, there might be a filename and an if clause. */
6071 if (cond_string == NULL)
6073 dll_pathname = ep_parse_optional_filename (&arg);
6074 ep_skip_leading_whitespace (&arg);
6075 cond_string = ep_parse_optional_if_clause (&arg);
6078 if ((*arg != '\0') && !isspace (*arg))
6079 error ("Junk at end of arguments.");
6081 /* Create an unload breakpoint that only triggers when an unload of
6082 the specified dll (or any dll, if no pathname was specified)
6084 SOLIB_CREATE_CATCH_UNLOAD_HOOK (inferior_pid, tempflag,
6085 dll_pathname, cond_string);
6087 #endif /* SOLIB_ADD */
6089 /* Commands to deal with catching exceptions. */
6091 /* Set a breakpoint at the specified callback routine for an
6092 exception event callback */
6095 create_exception_catchpoint (int tempflag, char *cond_string,
6096 enum exception_event_kind ex_event,
6097 struct symtab_and_line *sal)
6099 struct breakpoint *b;
6100 int thread = -1; /* All threads. */
6102 if (!sal) /* no exception support? */
6105 b = set_raw_breakpoint (*sal);
6106 set_breakpoint_count (breakpoint_count + 1);
6107 b->number = breakpoint_count;
6109 b->cond_string = (cond_string == NULL) ?
6110 NULL : savestring (cond_string, strlen (cond_string));
6112 b->addr_string = NULL;
6113 b->enable = enabled;
6114 b->disposition = tempflag ? del : donttouch;
6117 case EX_EVENT_THROW:
6118 b->type = bp_catch_throw;
6120 case EX_EVENT_CATCH:
6121 b->type = bp_catch_catch;
6123 default: /* error condition */
6125 b->enable = disabled;
6126 error ("Internal error -- invalid catchpoint kind");
6131 /* Deal with "catch catch" and "catch throw" commands */
6134 catch_exception_command_1 (enum exception_event_kind ex_event, char *arg,
6135 int tempflag, int from_tty)
6137 char *cond_string = NULL;
6138 struct symtab_and_line *sal = NULL;
6140 ep_skip_leading_whitespace (&arg);
6142 cond_string = ep_parse_optional_if_clause (&arg);
6144 if ((*arg != '\0') && !isspace (*arg))
6145 error ("Junk at end of arguments.");
6147 if ((ex_event != EX_EVENT_THROW) &&
6148 (ex_event != EX_EVENT_CATCH))
6149 error ("Unsupported or unknown exception event; cannot catch it");
6151 /* See if we can find a callback routine */
6152 sal = target_enable_exception_callback (ex_event, 1);
6156 /* We have callbacks from the runtime system for exceptions.
6157 Set a breakpoint on the sal found, if no errors */
6158 if (sal != (struct symtab_and_line *) -1)
6159 create_exception_catchpoint (tempflag, cond_string, ex_event, sal);
6161 return; /* something went wrong with setting up callbacks */
6165 /* No callbacks from runtime system for exceptions.
6166 Try GNU C++ exception breakpoints using labels in debug info. */
6167 if (ex_event == EX_EVENT_CATCH)
6169 handle_gnu_4_16_catch_command (arg, tempflag, from_tty);
6171 else if (ex_event == EX_EVENT_THROW)
6173 /* Set a breakpoint on __raise_exception () */
6175 warning ("Unsupported with this platform/compiler combination.");
6176 warning ("Perhaps you can achieve the effect you want by setting");
6177 warning ("a breakpoint on __raise_exception().");
6182 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6183 inside a catch_errors */
6186 cover_target_enable_exception_callback (PTR arg)
6188 args_for_catchpoint_enable *args = arg;
6189 struct symtab_and_line *sal;
6190 sal = target_enable_exception_callback (args->kind, args->enable);
6193 else if (sal == (struct symtab_and_line *) -1)
6196 return 1; /*is valid */
6201 /* This is the original v.4.16 and earlier version of the
6202 catch_command_1() function. Now that other flavours of "catch"
6203 have been introduced, and since exception handling can be handled
6204 in other ways (through target ops) also, this is used only for the
6205 GNU C++ exception handling system.
6206 Note: Only the "catch" flavour of GDB 4.16 is handled here. The
6207 "catch NAME" is now no longer allowed in catch_command_1(). Also,
6208 there was no code in GDB 4.16 for "catch throw".
6210 Called from catch_exception_command_1 () */
6214 handle_gnu_4_16_catch_command (char *arg, int tempflag, int from_tty)
6216 /* First, translate ARG into something we can deal with in terms
6219 struct symtabs_and_lines sals;
6220 struct symtab_and_line sal;
6221 register struct expression *cond = 0;
6222 register struct breakpoint *b;
6226 INIT_SAL (&sal); /* initialize to zeroes */
6228 /* If no arg given, or if first arg is 'if ', all active catch clauses
6229 are breakpointed. */
6231 if (!arg || (arg[0] == 'i' && arg[1] == 'f'
6232 && (arg[2] == ' ' || arg[2] == '\t')))
6234 /* Grab all active catch clauses. */
6235 sals = get_catch_sals (0);
6239 /* Grab selected catch clauses. */
6240 error ("catch NAME not implemented");
6243 /* Not sure why this code has been disabled. I'm leaving
6244 it disabled. We can never come here now anyway
6245 since we don't allow the "catch NAME" syntax.
6248 /* This isn't used; I don't know what it was for. */
6249 sals = map_catch_names (arg, catch_breakpoint);
6257 for (i = 0; i < sals.nelts; i++)
6259 resolve_sal_pc (&sals.sals[i]);
6263 if (arg[0] == 'i' && arg[1] == 'f'
6264 && (arg[2] == ' ' || arg[2] == '\t'))
6265 cond = parse_exp_1 ((arg += 2, &arg),
6266 block_for_pc (sals.sals[i].pc), 0);
6268 error ("Junk at end of arguments.");
6273 for (i = 0; i < sals.nelts; i++)
6278 describe_other_breakpoints (sal.pc, sal.section);
6280 b = set_raw_breakpoint (sal);
6281 set_breakpoint_count (breakpoint_count + 1);
6282 b->number = breakpoint_count;
6284 /* Important -- this is an ordinary breakpoint. For platforms
6285 with callback support for exceptions,
6286 create_exception_catchpoint() will create special bp types
6287 (bp_catch_catch and bp_catch_throw), and there is code in
6288 insert_breakpoints() and elsewhere that depends on that. */
6289 b->type = bp_breakpoint;
6292 b->enable = enabled;
6293 b->disposition = tempflag ? del : donttouch;
6300 warning ("Multiple breakpoints were set.");
6301 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
6307 /* This creates a temporary internal breakpoint
6308 just to placate infrun */
6309 static struct breakpoint *
6310 create_temp_exception_breakpoint (CORE_ADDR pc)
6312 struct symtab_and_line sal;
6313 struct breakpoint *b;
6320 b = set_raw_breakpoint (sal);
6322 error ("Internal error -- couldn't set temp exception breakpoint");
6324 b->type = bp_breakpoint;
6325 b->disposition = del;
6326 b->enable = enabled;
6328 b->number = internal_breakpoint_number--;
6334 catch_command_1 (char *arg, int tempflag, int from_tty)
6337 /* The first argument may be an event name, such as "start" or "load".
6338 If so, then handle it as such. If it doesn't match an event name,
6339 then attempt to interpret it as an exception name. (This latter is
6340 the v4.16-and-earlier GDB meaning of the "catch" command.)
6342 First, try to find the bounds of what might be an event name. */
6343 char *arg1_start = arg;
6347 if (arg1_start == NULL)
6349 /* Old behaviour was to use pre-v-4.16 syntax */
6350 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6352 /* Now, this is not allowed */
6353 error ("Catch requires an event name.");
6356 arg1_end = ep_find_event_name_end (arg1_start);
6357 if (arg1_end == NULL)
6358 error ("catch requires an event");
6359 arg1_length = arg1_end + 1 - arg1_start;
6361 /* Try to match what we found against known event names. */
6362 if (strncmp (arg1_start, "signal", arg1_length) == 0)
6364 error ("Catch of signal not yet implemented");
6366 else if (strncmp (arg1_start, "catch", arg1_length) == 0)
6368 catch_exception_command_1 (EX_EVENT_CATCH, arg1_end + 1,
6369 tempflag, from_tty);
6371 else if (strncmp (arg1_start, "throw", arg1_length) == 0)
6373 catch_exception_command_1 (EX_EVENT_THROW, arg1_end + 1,
6374 tempflag, from_tty);
6376 else if (strncmp (arg1_start, "thread_start", arg1_length) == 0)
6378 error ("Catch of thread_start not yet implemented");
6380 else if (strncmp (arg1_start, "thread_exit", arg1_length) == 0)
6382 error ("Catch of thread_exit not yet implemented");
6384 else if (strncmp (arg1_start, "thread_join", arg1_length) == 0)
6386 error ("Catch of thread_join not yet implemented");
6388 else if (strncmp (arg1_start, "start", arg1_length) == 0)
6390 error ("Catch of start not yet implemented");
6392 else if (strncmp (arg1_start, "exit", arg1_length) == 0)
6394 error ("Catch of exit not yet implemented");
6396 else if (strncmp (arg1_start, "fork", arg1_length) == 0)
6398 #if defined(CHILD_INSERT_FORK_CATCHPOINT)
6399 catch_fork_command_1 (catch_fork, arg1_end + 1, tempflag, from_tty);
6401 error ("Catch of fork not yet implemented");
6404 else if (strncmp (arg1_start, "vfork", arg1_length) == 0)
6406 #if defined(CHILD_INSERT_VFORK_CATCHPOINT)
6407 catch_fork_command_1 (catch_vfork, arg1_end + 1, tempflag, from_tty);
6409 error ("Catch of vfork not yet implemented");
6412 else if (strncmp (arg1_start, "exec", arg1_length) == 0)
6414 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6415 catch_exec_command_1 (arg1_end + 1, tempflag, from_tty);
6417 error ("Catch of exec not yet implemented");
6420 else if (strncmp (arg1_start, "load", arg1_length) == 0)
6422 #if defined(SOLIB_ADD)
6423 catch_load_command_1 (arg1_end + 1, tempflag, from_tty);
6425 error ("Catch of load not implemented");
6428 else if (strncmp (arg1_start, "unload", arg1_length) == 0)
6430 #if defined(SOLIB_ADD)
6431 catch_unload_command_1 (arg1_end + 1, tempflag, from_tty);
6433 error ("Catch of load not implemented");
6436 else if (strncmp (arg1_start, "stop", arg1_length) == 0)
6438 error ("Catch of stop not yet implemented");
6441 /* This doesn't appear to be an event name */
6445 /* Pre-v.4.16 behaviour was to treat the argument
6446 as the name of an exception */
6447 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6448 /* Now this is not allowed */
6449 error ("Unknown event kind specified for catch");
6454 /* Used by the gui, could be made a worker for other things. */
6457 set_breakpoint_sal (struct symtab_and_line sal)
6459 struct breakpoint *b;
6460 b = set_raw_breakpoint (sal);
6461 set_breakpoint_count (breakpoint_count + 1);
6462 b->number = breakpoint_count;
6463 b->type = bp_breakpoint;
6470 /* These aren't used; I don't know what they were for. */
6471 /* Disable breakpoints on all catch clauses described in ARGS. */
6473 disable_catch (char *args)
6475 /* Map the disable command to catch clauses described in ARGS. */
6478 /* Enable breakpoints on all catch clauses described in ARGS. */
6480 enable_catch (char *args)
6482 /* Map the disable command to catch clauses described in ARGS. */
6485 /* Delete breakpoints on all catch clauses in the active scope. */
6487 delete_catch (char *args)
6489 /* Map the delete command to catch clauses described in ARGS. */
6494 catch_command (char *arg, int from_tty)
6496 catch_command_1 (arg, 0, from_tty);
6501 tcatch_command (char *arg, int from_tty)
6503 catch_command_1 (arg, 1, from_tty);
6508 clear_command (char *arg, int from_tty)
6510 register struct breakpoint *b, *b1;
6512 struct symtabs_and_lines sals;
6513 struct symtab_and_line sal;
6514 register struct breakpoint *found;
6519 sals = decode_line_spec (arg, 1);
6524 sals.sals = (struct symtab_and_line *)
6525 xmalloc (sizeof (struct symtab_and_line));
6526 INIT_SAL (&sal); /* initialize to zeroes */
6527 sal.line = default_breakpoint_line;
6528 sal.symtab = default_breakpoint_symtab;
6529 sal.pc = default_breakpoint_address;
6530 if (sal.symtab == 0)
6531 error ("No source file specified.");
6539 /* For each line spec given, delete bps which correspond
6540 to it. We do this in two loops: the first loop looks at
6541 the initial bp(s) in the chain which should be deleted,
6542 the second goes down the rest of the chain looking ahead
6543 one so it can take those bps off the chain without messing
6547 for (i = 0; i < sals.nelts; i++)
6549 /* If exact pc given, clear bpts at that pc.
6550 If line given (pc == 0), clear all bpts on specified line.
6551 If defaulting, clear all bpts on default line
6554 defaulting sal.pc != 0 tests to do
6559 1 0 <can't happen> */
6562 found = (struct breakpoint *) 0;
6565 while (breakpoint_chain
6566 /* Why don't we check here that this is not
6567 a watchpoint, etc., as we do below?
6568 I can't make it fail, but don't know
6569 what's stopping the failure: a watchpoint
6570 of the same address as "sal.pc" should
6571 wind up being deleted. */
6573 && (((sal.pc && (breakpoint_chain->address == sal.pc)) &&
6574 (overlay_debugging == 0 ||
6575 breakpoint_chain->section == sal.section))
6576 || ((default_match || (0 == sal.pc))
6577 && breakpoint_chain->source_file != NULL
6578 && sal.symtab != NULL
6579 && STREQ (breakpoint_chain->source_file, sal.symtab->filename)
6580 && breakpoint_chain->line_number == sal.line)))
6583 b1 = breakpoint_chain;
6584 breakpoint_chain = b1->next;
6592 && b->next->type != bp_none
6593 && b->next->type != bp_watchpoint
6594 && b->next->type != bp_hardware_watchpoint
6595 && b->next->type != bp_read_watchpoint
6596 && b->next->type != bp_access_watchpoint
6597 && (((sal.pc && (b->next->address == sal.pc)) &&
6598 (overlay_debugging == 0 ||
6599 b->next->section == sal.section))
6600 || ((default_match || (0 == sal.pc))
6601 && b->next->source_file != NULL
6602 && sal.symtab != NULL
6603 && STREQ (b->next->source_file, sal.symtab->filename)
6604 && b->next->line_number == sal.line)))
6617 error ("No breakpoint at %s.", arg);
6619 error ("No breakpoint at this line.");
6623 from_tty = 1; /* Always report if deleted more than one */
6625 printf_unfiltered ("Deleted breakpoint%s ", found->next ? "s" : "");
6626 breakpoints_changed ();
6630 printf_unfiltered ("%d ", found->number);
6632 delete_breakpoint (found);
6636 putchar_unfiltered ('\n');
6641 /* Delete breakpoint in BS if they are `delete' breakpoints and
6642 all breakpoints that are marked for deletion, whether hit or not.
6643 This is called after any breakpoint is hit, or after errors. */
6646 breakpoint_auto_delete (bpstat bs)
6648 struct breakpoint *b, *temp;
6650 for (; bs; bs = bs->next)
6651 if (bs->breakpoint_at && bs->breakpoint_at->disposition == del
6653 delete_breakpoint (bs->breakpoint_at);
6655 ALL_BREAKPOINTS_SAFE (b, temp)
6657 if (b->disposition == del_at_next_stop)
6658 delete_breakpoint (b);
6662 /* Delete a breakpoint and clean up all traces of it in the data
6666 delete_breakpoint (struct breakpoint *bpt)
6668 register struct breakpoint *b;
6672 error ("Internal error (attempted to delete a NULL breakpoint)");
6675 /* Has this bp already been deleted? This can happen because multiple
6676 lists can hold pointers to bp's. bpstat lists are especial culprits.
6678 One example of this happening is a watchpoint's scope bp. When the
6679 scope bp triggers, we notice that the watchpoint is out of scope, and
6680 delete it. We also delete its scope bp. But the scope bp is marked
6681 "auto-deleting", and is already on a bpstat. That bpstat is then
6682 checked for auto-deleting bp's, which are deleted.
6684 A real solution to this problem might involve reference counts in bp's,
6685 and/or giving them pointers back to their referencing bpstat's, and
6686 teaching delete_breakpoint to only free a bp's storage when no more
6687 references were extent. A cheaper bandaid was chosen. */
6688 if (bpt->type == bp_none)
6691 if (delete_breakpoint_hook)
6692 delete_breakpoint_hook (bpt);
6693 breakpoint_delete_event (bpt->number);
6696 remove_breakpoint (bpt, mark_uninserted);
6698 if (breakpoint_chain == bpt)
6699 breakpoint_chain = bpt->next;
6701 /* If we have callback-style exception catchpoints, don't go through
6702 the adjustments to the C++ runtime library etc. if the inferior
6703 isn't actually running. target_enable_exception_callback for a
6704 null target ops vector gives an undesirable error message, so we
6705 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6706 exceptions are supported in this way, it's OK for now. FIXME */
6707 if (ep_is_exception_catchpoint (bpt) && target_has_execution)
6709 static char message1[] = "Error in deleting catchpoint %d:\n";
6710 static char message[sizeof (message1) + 30];
6711 args_for_catchpoint_enable args;
6713 /* Format possible error msg */
6714 sprintf (message, message1, bpt->number);
6715 args.kind = bpt->type == bp_catch_catch ?
6716 EX_EVENT_CATCH : EX_EVENT_THROW;
6718 catch_errors (cover_target_enable_exception_callback, &args,
6719 message, RETURN_MASK_ALL);
6726 b->next = bpt->next;
6730 /* Before turning off the visuals for the bp, check to see that
6731 there are no other bps at the same address. */
6738 clearIt = (b->address != bpt->address);
6745 TUIDO (((TuiOpaqueFuncPtr) tui_vAllSetHasBreakAt, bpt, 0));
6746 TUIDO (((TuiOpaqueFuncPtr) tuiUpdateAllExecInfos));
6750 check_duplicates (bpt->address, bpt->section);
6751 /* If this breakpoint was inserted, and there is another breakpoint
6752 at the same address, we need to insert the other breakpoint. */
6754 && bpt->type != bp_hardware_watchpoint
6755 && bpt->type != bp_read_watchpoint
6756 && bpt->type != bp_access_watchpoint
6757 && bpt->type != bp_catch_fork
6758 && bpt->type != bp_catch_vfork
6759 && bpt->type != bp_catch_exec)
6762 if (b->address == bpt->address
6763 && b->section == bpt->section
6765 && b->enable != disabled
6766 && b->enable != shlib_disabled
6767 && b->enable != call_disabled)
6771 /* We should never reach this point if there is a permanent
6772 breakpoint at the same address as the one being deleted.
6773 If there is a permanent breakpoint somewhere, it should
6774 always be the only one inserted. */
6775 if (b->enable == permanent)
6776 internal_error (__FILE__, __LINE__,
6777 "another breakpoint was inserted on top of "
6778 "a permanent breakpoint");
6780 if (b->type == bp_hardware_breakpoint)
6781 val = target_insert_hw_breakpoint (b->address, b->shadow_contents);
6783 val = target_insert_breakpoint (b->address, b->shadow_contents);
6787 target_terminal_ours_for_output ();
6788 warning ("Cannot insert breakpoint %d:", b->number);
6789 memory_error (val, b->address); /* which bombs us out */
6796 free_command_lines (&bpt->commands);
6799 if (bpt->cond_string != NULL)
6800 xfree (bpt->cond_string);
6801 if (bpt->addr_string != NULL)
6802 xfree (bpt->addr_string);
6803 if (bpt->exp != NULL)
6805 if (bpt->exp_string != NULL)
6806 xfree (bpt->exp_string);
6807 if (bpt->val != NULL)
6808 value_free (bpt->val);
6809 if (bpt->source_file != NULL)
6810 xfree (bpt->source_file);
6811 if (bpt->dll_pathname != NULL)
6812 xfree (bpt->dll_pathname);
6813 if (bpt->triggered_dll_pathname != NULL)
6814 xfree (bpt->triggered_dll_pathname);
6815 if (bpt->exec_pathname != NULL)
6816 xfree (bpt->exec_pathname);
6818 /* Be sure no bpstat's are pointing at it after it's been freed. */
6819 /* FIXME, how can we find all bpstat's?
6820 We just check stop_bpstat for now. */
6821 for (bs = stop_bpstat; bs; bs = bs->next)
6822 if (bs->breakpoint_at == bpt)
6824 bs->breakpoint_at = NULL;
6826 /* we'd call bpstat_clear_actions, but that free's stuff and due
6827 to the multiple pointers pointing to one item with no
6828 reference counts found anywhere through out the bpstat's (how
6829 do you spell fragile?), we don't want to free things twice --
6830 better a memory leak than a corrupt malloc pool! */
6831 bs->commands = NULL;
6834 /* On the chance that someone will soon try again to delete this same
6835 bp, we mark it as deleted before freeing its storage. */
6836 bpt->type = bp_none;
6842 do_delete_breakpoint_cleanup (void *b)
6844 delete_breakpoint (b);
6848 make_cleanup_delete_breakpoint (struct breakpoint *b)
6850 return make_cleanup (do_delete_breakpoint_cleanup, b);
6854 make_exec_cleanup_delete_breakpoint (struct breakpoint *b)
6856 return make_exec_cleanup (do_delete_breakpoint_cleanup, b);
6860 delete_command (char *arg, int from_tty)
6862 struct breakpoint *b, *temp;
6866 int breaks_to_delete = 0;
6868 /* Delete all breakpoints if no argument.
6869 Do not delete internal or call-dummy breakpoints, these
6870 have to be deleted with an explicit breakpoint number argument. */
6873 if (b->type != bp_call_dummy &&
6874 b->type != bp_shlib_event &&
6875 b->type != bp_thread_event &&
6877 breaks_to_delete = 1;
6880 /* Ask user only if there are some breakpoints to delete. */
6882 || (breaks_to_delete && query ("Delete all breakpoints? ")))
6884 ALL_BREAKPOINTS_SAFE (b, temp)
6886 if (b->type != bp_call_dummy &&
6887 b->type != bp_shlib_event &&
6888 b->type != bp_thread_event &&
6890 delete_breakpoint (b);
6895 map_breakpoint_numbers (arg, delete_breakpoint);
6898 /* Reset a breakpoint given it's struct breakpoint * BINT.
6899 The value we return ends up being the return value from catch_errors.
6900 Unused in this case. */
6903 breakpoint_re_set_one (PTR bint)
6905 /* get past catch_errs */
6906 struct breakpoint *b = (struct breakpoint *) bint;
6909 struct symtabs_and_lines sals;
6911 enum enable save_enable;
6916 warning ("attempted to reset apparently deleted breakpoint #%d?",
6920 case bp_hardware_breakpoint:
6922 case bp_catch_unload:
6923 if (b->addr_string == NULL)
6925 /* Anything without a string can't be re-set. */
6926 delete_breakpoint (b);
6929 /* In case we have a problem, disable this breakpoint. We'll restore
6930 its status if we succeed. */
6931 save_enable = b->enable;
6932 b->enable = disabled;
6934 set_language (b->language);
6935 input_radix = b->input_radix;
6937 sals = decode_line_1 (&s, 1, (struct symtab *) NULL, 0, (char ***) NULL);
6938 for (i = 0; i < sals.nelts; i++)
6940 resolve_sal_pc (&sals.sals[i]);
6942 /* Reparse conditions, they might contain references to the
6944 if (b->cond_string != NULL)
6949 b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0);
6952 /* We need to re-set the breakpoint if the address changes... */
6953 if (b->address != sals.sals[i].pc
6954 /* ...or new and old breakpoints both have source files, and
6955 the source file name or the line number changes... */
6956 || (b->source_file != NULL
6957 && sals.sals[i].symtab != NULL
6958 && (!STREQ (b->source_file, sals.sals[i].symtab->filename)
6959 || b->line_number != sals.sals[i].line)
6961 /* ...or we switch between having a source file and not having
6963 || ((b->source_file == NULL) != (sals.sals[i].symtab == NULL))
6966 if (b->source_file != NULL)
6967 xfree (b->source_file);
6968 if (sals.sals[i].symtab == NULL)
6969 b->source_file = NULL;
6972 savestring (sals.sals[i].symtab->filename,
6973 strlen (sals.sals[i].symtab->filename));
6974 b->line_number = sals.sals[i].line;
6975 b->address = sals.sals[i].pc;
6977 /* Used to check for duplicates here, but that can
6978 cause trouble, as it doesn't check for disable
6983 /* Might be better to do this just once per breakpoint_re_set,
6984 rather than once for every breakpoint. */
6985 breakpoints_changed ();
6987 b->section = sals.sals[i].section;
6988 b->enable = save_enable; /* Restore it, this worked. */
6991 /* Now that this is re-enabled, check_duplicates
6993 check_duplicates (b->address, b->section);
7000 case bp_hardware_watchpoint:
7001 case bp_read_watchpoint:
7002 case bp_access_watchpoint:
7003 innermost_block = NULL;
7004 /* The issue arises of what context to evaluate this in. The
7005 same one as when it was set, but what does that mean when
7006 symbols have been re-read? We could save the filename and
7007 functionname, but if the context is more local than that, the
7008 best we could do would be something like how many levels deep
7009 and which index at that particular level, but that's going to
7010 be less stable than filenames or function names. */
7012 /* So for now, just use a global context. */
7015 b->exp = parse_expression (b->exp_string);
7016 b->exp_valid_block = innermost_block;
7017 mark = value_mark ();
7019 value_free (b->val);
7020 b->val = evaluate_expression (b->exp);
7021 release_value (b->val);
7022 if (VALUE_LAZY (b->val))
7023 value_fetch_lazy (b->val);
7025 if (b->cond_string != NULL)
7030 b->cond = parse_exp_1 (&s, (struct block *) 0, 0);
7032 if (b->enable == enabled)
7034 value_free_to_mark (mark);
7036 case bp_catch_catch:
7037 case bp_catch_throw:
7039 /* We needn't really do anything to reset these, since the mask
7040 that requests them is unaffected by e.g., new libraries being
7043 case bp_catch_vfork:
7048 printf_filtered ("Deleting unknown breakpoint type %d\n", b->type);
7050 /* Delete longjmp breakpoints, they will be reset later by
7051 breakpoint_re_set. */
7053 case bp_longjmp_resume:
7054 delete_breakpoint (b);
7057 /* This breakpoint is special, it's set up when the inferior
7058 starts and we really don't want to touch it. */
7059 case bp_shlib_event:
7061 /* Like bp_shlib_event, this breakpoint type is special.
7062 Once it is set up, we do not want to touch it. */
7063 case bp_thread_event:
7065 /* Keep temporary breakpoints, which can be encountered when we step
7066 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7067 Otherwise these should have been blown away via the cleanup chain
7068 or by breakpoint_init_inferior when we rerun the executable. */
7071 case bp_watchpoint_scope:
7073 case bp_step_resume:
7080 /* Re-set all breakpoints after symbols have been re-loaded. */
7082 breakpoint_re_set (void)
7084 struct breakpoint *b, *temp;
7085 enum language save_language;
7086 int save_input_radix;
7087 static char message1[] = "Error in re-setting breakpoint %d:\n";
7088 char message[sizeof (message1) + 30 /* slop */ ];
7090 save_language = current_language->la_language;
7091 save_input_radix = input_radix;
7092 ALL_BREAKPOINTS_SAFE (b, temp)
7094 /* Format possible error msg */
7095 sprintf (message, message1, b->number);
7096 catch_errors (breakpoint_re_set_one, b, message, RETURN_MASK_ALL);
7098 set_language (save_language);
7099 input_radix = save_input_radix;
7101 #ifdef GET_LONGJMP_TARGET
7102 create_longjmp_breakpoint ("longjmp");
7103 create_longjmp_breakpoint ("_longjmp");
7104 create_longjmp_breakpoint ("siglongjmp");
7105 create_longjmp_breakpoint ("_siglongjmp");
7106 create_longjmp_breakpoint (NULL);
7110 /* Took this out (temporarily at least), since it produces an extra
7111 blank line at startup. This messes up the gdbtests. -PB */
7112 /* Blank line to finish off all those mention() messages we just printed. */
7113 printf_filtered ("\n");
7117 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7118 If from_tty is nonzero, it prints a message to that effect,
7119 which ends with a period (no newline). */
7121 /* Reset the thread number of this breakpoint:
7123 - If the breakpoint is for all threads, leave it as-is.
7124 - Else, reset it to the current thread for inferior_pid. */
7126 breakpoint_re_set_thread (struct breakpoint *b)
7128 if (b->thread != -1)
7130 if (in_thread_list (inferior_pid))
7131 b->thread = pid_to_thread_id (inferior_pid);
7136 set_ignore_count (int bptnum, int count, int from_tty)
7138 register struct breakpoint *b;
7144 if (b->number == bptnum)
7146 b->ignore_count = count;
7149 else if (count == 0)
7150 printf_filtered ("Will stop next time breakpoint %d is reached.",
7152 else if (count == 1)
7153 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7156 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7158 breakpoints_changed ();
7162 error ("No breakpoint number %d.", bptnum);
7165 /* Clear the ignore counts of all breakpoints. */
7167 breakpoint_clear_ignore_counts (void)
7169 struct breakpoint *b;
7172 b->ignore_count = 0;
7175 /* Command to set ignore-count of breakpoint N to COUNT. */
7178 ignore_command (char *args, int from_tty)
7184 error_no_arg ("a breakpoint number");
7186 num = get_number (&p);
7188 error ("bad breakpoint number: '%s'", args);
7190 error ("Second argument (specified ignore-count) is missing.");
7192 set_ignore_count (num,
7193 longest_to_int (value_as_long (parse_and_eval (p))),
7195 printf_filtered ("\n");
7196 breakpoints_changed ();
7199 /* Call FUNCTION on each of the breakpoints
7200 whose numbers are given in ARGS. */
7203 map_breakpoint_numbers (char *args, void (*function) (struct breakpoint *))
7205 register char *p = args;
7208 register struct breakpoint *b, *tmp;
7212 error_no_arg ("one or more breakpoint numbers");
7219 num = get_number_or_range (&p1);
7222 warning ("bad breakpoint number at or near '%s'", p);
7226 ALL_BREAKPOINTS_SAFE (b, tmp)
7227 if (b->number == num)
7229 struct breakpoint *related_breakpoint = b->related_breakpoint;
7232 if (related_breakpoint)
7233 function (related_breakpoint);
7237 printf_unfiltered ("No breakpoint number %d.\n", num);
7244 disable_breakpoint (struct breakpoint *bpt)
7246 /* Never disable a watchpoint scope breakpoint; we want to
7247 hit them when we leave scope so we can delete both the
7248 watchpoint and its scope breakpoint at that time. */
7249 if (bpt->type == bp_watchpoint_scope)
7252 /* You can't disable permanent breakpoints. */
7253 if (bpt->enable == permanent)
7256 bpt->enable = disabled;
7258 check_duplicates (bpt->address, bpt->section);
7260 if (modify_breakpoint_hook)
7261 modify_breakpoint_hook (bpt);
7262 breakpoint_modify_event (bpt->number);
7267 disable_command (char *args, int from_tty)
7269 register struct breakpoint *bpt;
7271 ALL_BREAKPOINTS (bpt)
7275 warning ("attempted to disable apparently deleted breakpoint #%d?",
7280 case bp_catch_unload:
7282 case bp_catch_vfork:
7284 case bp_catch_catch:
7285 case bp_catch_throw:
7286 case bp_hardware_breakpoint:
7288 case bp_hardware_watchpoint:
7289 case bp_read_watchpoint:
7290 case bp_access_watchpoint:
7291 disable_breakpoint (bpt);
7296 map_breakpoint_numbers (args, disable_breakpoint);
7300 do_enable_breakpoint (struct breakpoint *bpt, enum bpdisp disposition)
7302 struct frame_info *save_selected_frame = NULL;
7303 int save_selected_frame_level = -1;
7304 int target_resources_ok, other_type_used;
7307 if (bpt->type == bp_hardware_breakpoint)
7310 i = hw_breakpoint_used_count ();
7311 target_resources_ok =
7312 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint,
7314 if (target_resources_ok == 0)
7315 error ("No hardware breakpoint support in the target.");
7316 else if (target_resources_ok < 0)
7317 error ("Hardware breakpoints used exceeds limit.");
7320 if (bpt->enable != permanent)
7321 bpt->enable = enabled;
7322 bpt->disposition = disposition;
7323 check_duplicates (bpt->address, bpt->section);
7324 breakpoints_changed ();
7326 if (bpt->type == bp_watchpoint ||
7327 bpt->type == bp_hardware_watchpoint ||
7328 bpt->type == bp_read_watchpoint ||
7329 bpt->type == bp_access_watchpoint)
7331 if (bpt->exp_valid_block != NULL)
7333 struct frame_info *fr =
7335 /* Ensure that we have the current frame. Else, this
7336 next query may pessimistically be answered as, "No,
7337 not within current scope". */
7338 get_current_frame ();
7339 fr = find_frame_addr_in_frame_chain (bpt->watchpoint_frame);
7343 Cannot enable watchpoint %d because the block in which its expression\n\
7344 is valid is not currently in scope.\n", bpt->number);
7345 bpt->enable = disabled;
7349 save_selected_frame = selected_frame;
7350 save_selected_frame_level = selected_frame_level;
7351 select_frame (fr, -1);
7354 value_free (bpt->val);
7355 mark = value_mark ();
7356 bpt->val = evaluate_expression (bpt->exp);
7357 release_value (bpt->val);
7358 if (VALUE_LAZY (bpt->val))
7359 value_fetch_lazy (bpt->val);
7361 if (bpt->type == bp_hardware_watchpoint ||
7362 bpt->type == bp_read_watchpoint ||
7363 bpt->type == bp_access_watchpoint)
7365 int i = hw_watchpoint_used_count (bpt->type, &other_type_used);
7366 int mem_cnt = can_use_hardware_watchpoint (bpt->val);
7368 /* Hack around 'unused var' error for some targets here */
7370 target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7371 bpt->type, i + mem_cnt, other_type_used);
7372 /* we can consider of type is bp_hardware_watchpoint, convert to
7373 bp_watchpoint in the following condition */
7374 if (target_resources_ok < 0)
7377 Cannot enable watchpoint %d because target watch resources\n\
7378 have been allocated for other watchpoints.\n", bpt->number);
7379 bpt->enable = disabled;
7380 value_free_to_mark (mark);
7385 if (save_selected_frame_level >= 0)
7386 select_frame (save_selected_frame, save_selected_frame_level);
7387 value_free_to_mark (mark);
7389 if (modify_breakpoint_hook)
7390 modify_breakpoint_hook (bpt);
7391 breakpoint_modify_event (bpt->number);
7395 enable_breakpoint (struct breakpoint *bpt)
7397 do_enable_breakpoint (bpt, bpt->disposition);
7400 /* The enable command enables the specified breakpoints (or all defined
7401 breakpoints) so they once again become (or continue to be) effective
7402 in stopping the inferior. */
7406 enable_command (char *args, int from_tty)
7408 register struct breakpoint *bpt;
7410 ALL_BREAKPOINTS (bpt)
7414 warning ("attempted to enable apparently deleted breakpoint #%d?",
7419 case bp_catch_unload:
7421 case bp_catch_vfork:
7423 case bp_catch_catch:
7424 case bp_catch_throw:
7425 case bp_hardware_breakpoint:
7427 case bp_hardware_watchpoint:
7428 case bp_read_watchpoint:
7429 case bp_access_watchpoint:
7430 enable_breakpoint (bpt);
7435 map_breakpoint_numbers (args, enable_breakpoint);
7439 enable_once_breakpoint (struct breakpoint *bpt)
7441 do_enable_breakpoint (bpt, disable);
7446 enable_once_command (char *args, int from_tty)
7448 map_breakpoint_numbers (args, enable_once_breakpoint);
7452 enable_delete_breakpoint (struct breakpoint *bpt)
7454 do_enable_breakpoint (bpt, del);
7459 enable_delete_command (char *args, int from_tty)
7461 map_breakpoint_numbers (args, enable_delete_breakpoint);
7464 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7466 struct symtabs_and_lines
7467 decode_line_spec_1 (char *string, int funfirstline)
7469 struct symtabs_and_lines sals;
7471 error ("Empty line specification.");
7472 if (default_breakpoint_valid)
7473 sals = decode_line_1 (&string, funfirstline,
7474 default_breakpoint_symtab,
7475 default_breakpoint_line,
7478 sals = decode_line_1 (&string, funfirstline,
7479 (struct symtab *) NULL, 0, (char ***) NULL);
7481 error ("Junk at end of line specification: %s", string);
7486 _initialize_breakpoint (void)
7488 struct cmd_list_element *c;
7490 breakpoint_chain = 0;
7491 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7492 before a breakpoint is set. */
7493 breakpoint_count = 0;
7495 add_com ("ignore", class_breakpoint, ignore_command,
7496 "Set ignore-count of breakpoint number N to COUNT.\n\
7497 Usage is `ignore N COUNT'.");
7499 add_com_alias ("bc", "ignore", class_breakpoint, 1);
7501 add_com ("commands", class_breakpoint, commands_command,
7502 "Set commands to be executed when a breakpoint is hit.\n\
7503 Give breakpoint number as argument after \"commands\".\n\
7504 With no argument, the targeted breakpoint is the last one set.\n\
7505 The commands themselves follow starting on the next line.\n\
7506 Type a line containing \"end\" to indicate the end of them.\n\
7507 Give \"silent\" as the first line to make the breakpoint silent;\n\
7508 then no output is printed when it is hit, except what the commands print.");
7510 add_com ("condition", class_breakpoint, condition_command,
7511 "Specify breakpoint number N to break only if COND is true.\n\
7512 Usage is `condition N COND', where N is an integer and COND is an\n\
7513 expression to be evaluated whenever breakpoint N is reached. ");
7515 add_com ("tbreak", class_breakpoint, tbreak_command,
7516 "Set a temporary breakpoint. Args like \"break\" command.\n\
7517 Like \"break\" except the breakpoint is only temporary,\n\
7518 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7519 by using \"enable delete\" on the breakpoint number.");
7520 add_com ("txbreak", class_breakpoint, tbreak_at_finish_command,
7521 "Set temporary breakpoint at procedure exit. Either there should\n\
7522 be no argument or the argument must be a depth.\n");
7524 add_com ("hbreak", class_breakpoint, hbreak_command,
7525 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7526 Like \"break\" except the breakpoint requires hardware support,\n\
7527 some target hardware may not have this support.");
7529 add_com ("thbreak", class_breakpoint, thbreak_command,
7530 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7531 Like \"hbreak\" except the breakpoint is only temporary,\n\
7532 so it will be deleted when hit.");
7534 add_prefix_cmd ("enable", class_breakpoint, enable_command,
7535 "Enable some breakpoints.\n\
7536 Give breakpoint numbers (separated by spaces) as arguments.\n\
7537 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7538 This is used to cancel the effect of the \"disable\" command.\n\
7539 With a subcommand you can enable temporarily.",
7540 &enablelist, "enable ", 1, &cmdlist);
7542 add_com ("ab", class_breakpoint, enable_command,
7543 "Enable some breakpoints.\n\
7544 Give breakpoint numbers (separated by spaces) as arguments.\n\
7545 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7546 This is used to cancel the effect of the \"disable\" command.\n\
7547 With a subcommand you can enable temporarily.");
7549 add_com_alias ("en", "enable", class_breakpoint, 1);
7551 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command,
7552 "Enable some breakpoints.\n\
7553 Give breakpoint numbers (separated by spaces) as arguments.\n\
7554 This is used to cancel the effect of the \"disable\" command.\n\
7555 May be abbreviated to simply \"enable\".\n",
7556 &enablebreaklist, "enable breakpoints ", 1, &enablelist);
7558 add_cmd ("once", no_class, enable_once_command,
7559 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7560 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7563 add_cmd ("delete", no_class, enable_delete_command,
7564 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7565 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7568 add_cmd ("delete", no_class, enable_delete_command,
7569 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7570 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7573 add_cmd ("once", no_class, enable_once_command,
7574 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7575 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7578 add_prefix_cmd ("disable", class_breakpoint, disable_command,
7579 "Disable some breakpoints.\n\
7580 Arguments are breakpoint numbers with spaces in between.\n\
7581 To disable all breakpoints, give no argument.\n\
7582 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7583 &disablelist, "disable ", 1, &cmdlist);
7584 add_com_alias ("dis", "disable", class_breakpoint, 1);
7585 add_com_alias ("disa", "disable", class_breakpoint, 1);
7587 add_com ("sb", class_breakpoint, disable_command,
7588 "Disable some breakpoints.\n\
7589 Arguments are breakpoint numbers with spaces in between.\n\
7590 To disable all breakpoints, give no argument.\n\
7591 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7593 add_cmd ("breakpoints", class_alias, disable_command,
7594 "Disable some breakpoints.\n\
7595 Arguments are breakpoint numbers with spaces in between.\n\
7596 To disable all breakpoints, give no argument.\n\
7597 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7598 This command may be abbreviated \"disable\".",
7601 add_prefix_cmd ("delete", class_breakpoint, delete_command,
7602 "Delete some breakpoints or auto-display expressions.\n\
7603 Arguments are breakpoint numbers with spaces in between.\n\
7604 To delete all breakpoints, give no argument.\n\
7606 Also a prefix command for deletion of other GDB objects.\n\
7607 The \"unset\" command is also an alias for \"delete\".",
7608 &deletelist, "delete ", 1, &cmdlist);
7609 add_com_alias ("d", "delete", class_breakpoint, 1);
7611 add_com ("db", class_breakpoint, delete_command,
7612 "Delete some breakpoints.\n\
7613 Arguments are breakpoint numbers with spaces in between.\n\
7614 To delete all breakpoints, give no argument.\n");
7616 add_cmd ("breakpoints", class_alias, delete_command,
7617 "Delete some breakpoints or auto-display expressions.\n\
7618 Arguments are breakpoint numbers with spaces in between.\n\
7619 To delete all breakpoints, give no argument.\n\
7620 This command may be abbreviated \"delete\".",
7623 add_com ("clear", class_breakpoint, clear_command,
7624 concat ("Clear breakpoint at specified line or function.\n\
7625 Argument may be line number, function name, or \"*\" and an address.\n\
7626 If line number is specified, all breakpoints in that line are cleared.\n\
7627 If function is specified, breakpoints at beginning of function are cleared.\n\
7628 If an address is specified, breakpoints at that address are cleared.\n\n",
7629 "With no argument, clears all breakpoints in the line that the selected frame\n\
7632 See also the \"delete\" command which clears breakpoints by number.", NULL));
7634 add_com ("break", class_breakpoint, break_command,
7635 concat ("Set breakpoint at specified line or function.\n\
7636 Argument may be line number, function name, or \"*\" and an address.\n\
7637 If line number is specified, break at start of code for that line.\n\
7638 If function is specified, break at start of code for that function.\n\
7639 If an address is specified, break at that exact address.\n",
7640 "With no arg, uses current execution address of selected stack frame.\n\
7641 This is useful for breaking on return to a stack frame.\n\
7643 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7645 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL));
7646 add_com_alias ("b", "break", class_run, 1);
7647 add_com_alias ("br", "break", class_run, 1);
7648 add_com_alias ("bre", "break", class_run, 1);
7649 add_com_alias ("brea", "break", class_run, 1);
7651 add_com ("xbreak", class_breakpoint, break_at_finish_command,
7652 concat ("Set breakpoint at procedure exit. \n\
7653 Argument may be function name, or \"*\" and an address.\n\
7654 If function is specified, break at end of code for that function.\n\
7655 If an address is specified, break at the end of the function that contains \n\
7656 that exact address.\n",
7657 "With no arg, uses current execution address of selected stack frame.\n\
7658 This is useful for breaking on return to a stack frame.\n\
7660 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7662 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL));
7663 add_com_alias ("xb", "xbreak", class_breakpoint, 1);
7664 add_com_alias ("xbr", "xbreak", class_breakpoint, 1);
7665 add_com_alias ("xbre", "xbreak", class_breakpoint, 1);
7666 add_com_alias ("xbrea", "xbreak", class_breakpoint, 1);
7670 add_com_alias ("ba", "break", class_breakpoint, 1);
7671 add_com_alias ("bu", "ubreak", class_breakpoint, 1);
7672 add_com ("bx", class_breakpoint, break_at_finish_at_depth_command,
7673 "Set breakpoint at procedure exit. Either there should\n\
7674 be no argument or the argument must be a depth.\n");
7679 add_abbrev_prefix_cmd ("stop", class_breakpoint, stop_command,
7680 "Break in function/address or break at a line in the current file.",
7681 &stoplist, "stop ", 1, &cmdlist);
7682 add_cmd ("in", class_breakpoint, stopin_command,
7683 "Break in function or address.\n", &stoplist);
7684 add_cmd ("at", class_breakpoint, stopat_command,
7685 "Break at a line in the current file.\n", &stoplist);
7686 add_com ("status", class_info, breakpoints_info,
7687 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7688 The \"Type\" column indicates one of:\n\
7689 \tbreakpoint - normal breakpoint\n\
7690 \twatchpoint - watchpoint\n\
7691 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7692 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7693 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7694 address and file/line number respectively.\n\n",
7695 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7696 are set to the address of the last breakpoint listed.\n\n\
7697 Convenience variable \"$bpnum\" contains the number of the last\n\
7698 breakpoint set.", NULL));
7701 add_info ("breakpoints", breakpoints_info,
7702 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7703 The \"Type\" column indicates one of:\n\
7704 \tbreakpoint - normal breakpoint\n\
7705 \twatchpoint - watchpoint\n\
7706 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7707 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7708 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7709 address and file/line number respectively.\n\n",
7710 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7711 are set to the address of the last breakpoint listed.\n\n\
7712 Convenience variable \"$bpnum\" contains the number of the last\n\
7713 breakpoint set.", NULL));
7716 add_com ("lb", class_breakpoint, breakpoints_info,
7717 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7718 The \"Type\" column indicates one of:\n\
7719 \tbreakpoint - normal breakpoint\n\
7720 \twatchpoint - watchpoint\n\
7721 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7722 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7723 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7724 address and file/line number respectively.\n\n",
7725 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7726 are set to the address of the last breakpoint listed.\n\n\
7727 Convenience variable \"$bpnum\" contains the number of the last\n\
7728 breakpoint set.", NULL));
7730 add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints,
7731 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7732 The \"Type\" column indicates one of:\n\
7733 \tbreakpoint - normal breakpoint\n\
7734 \twatchpoint - watchpoint\n\
7735 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7736 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7737 \tuntil - internal breakpoint used by the \"until\" command\n\
7738 \tfinish - internal breakpoint used by the \"finish\" command\n",
7739 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7740 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7741 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7742 address and file/line number respectively.\n\n",
7743 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7744 are set to the address of the last breakpoint listed.\n\n\
7745 Convenience variable \"$bpnum\" contains the number of the last\n\
7746 breakpoint set.", NULL),
7747 &maintenanceinfolist);
7749 add_com ("catch", class_breakpoint, catch_command,
7750 "Set catchpoints to catch events.\n\
7751 Raised signals may be caught:\n\
7752 \tcatch signal - all signals\n\
7753 \tcatch signal <signame> - a particular signal\n\
7754 Raised exceptions may be caught:\n\
7755 \tcatch throw - all exceptions, when thrown\n\
7756 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7757 \tcatch catch - all exceptions, when caught\n\
7758 \tcatch catch <exceptname> - a particular exception, when caught\n\
7759 Thread or process events may be caught:\n\
7760 \tcatch thread_start - any threads, just after creation\n\
7761 \tcatch thread_exit - any threads, just before expiration\n\
7762 \tcatch thread_join - any threads, just after joins\n\
7763 Process events may be caught:\n\
7764 \tcatch start - any processes, just after creation\n\
7765 \tcatch exit - any processes, just before expiration\n\
7766 \tcatch fork - calls to fork()\n\
7767 \tcatch vfork - calls to vfork()\n\
7768 \tcatch exec - calls to exec()\n\
7769 Dynamically-linked library events may be caught:\n\
7770 \tcatch load - loads of any library\n\
7771 \tcatch load <libname> - loads of a particular library\n\
7772 \tcatch unload - unloads of any library\n\
7773 \tcatch unload <libname> - unloads of a particular library\n\
7774 The act of your program's execution stopping may also be caught:\n\
7776 C++ exceptions may be caught:\n\
7777 \tcatch throw - all exceptions, when thrown\n\
7778 \tcatch catch - all exceptions, when caught\n\
7780 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7781 after a fork or vfork is caught.\n\n\
7782 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7784 add_com ("tcatch", class_breakpoint, tcatch_command,
7785 "Set temporary catchpoints to catch events.\n\
7786 Args like \"catch\" command.\n\
7787 Like \"catch\" except the catchpoint is only temporary,\n\
7788 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7789 by using \"enable delete\" on the catchpoint number.");
7791 add_com ("watch", class_breakpoint, watch_command,
7792 "Set a watchpoint for an expression.\n\
7793 A watchpoint stops execution of your program whenever the value of\n\
7794 an expression changes.");
7796 add_com ("rwatch", class_breakpoint, rwatch_command,
7797 "Set a read watchpoint for an expression.\n\
7798 A watchpoint stops execution of your program whenever the value of\n\
7799 an expression is read.");
7801 add_com ("awatch", class_breakpoint, awatch_command,
7802 "Set a watchpoint for an expression.\n\
7803 A watchpoint stops execution of your program whenever the value of\n\
7804 an expression is either read or written.");
7806 add_info ("watchpoints", breakpoints_info,
7807 "Synonym for ``info breakpoints''.");
7810 c = add_set_cmd ("can-use-hw-watchpoints", class_support, var_zinteger,
7811 (char *) &can_use_hw_watchpoints,
7812 "Set debugger's willingness to use watchpoint hardware.\n\
7813 If zero, gdb will not use hardware for new watchpoints, even if\n\
7814 such is available. (However, any hardware watchpoints that were\n\
7815 created before setting this to nonzero, will continue to use watchpoint\n\
7818 add_show_from_set (c, &showlist);
7820 can_use_hw_watchpoints = 1;