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"
43 #include "completer.h"
48 #include "gdb-events.h"
50 /* Prototypes for local functions. */
52 static void until_break_command_continuation (struct continuation_arg *arg);
54 static void catch_command_1 (char *, int, int);
56 static void enable_delete_command (char *, int);
58 static void enable_delete_breakpoint (struct breakpoint *);
60 static void enable_once_command (char *, int);
62 static void enable_once_breakpoint (struct breakpoint *);
64 static void disable_command (char *, int);
66 static void enable_command (char *, int);
68 static void map_breakpoint_numbers (char *, void (*)(struct breakpoint *));
70 static void ignore_command (char *, int);
72 static int breakpoint_re_set_one (PTR);
74 static void clear_command (char *, int);
76 static void catch_command (char *, int);
78 static void handle_gnu_4_16_catch_command (char *, int, int);
80 static struct symtabs_and_lines get_catch_sals (int);
82 static void watch_command (char *, int);
84 static int can_use_hardware_watchpoint (struct value *);
86 static void break_at_finish_command (char *, int);
87 static void break_at_finish_at_depth_command (char *, int);
89 static void tbreak_at_finish_command (char *, int);
91 static void break_command_1 (char *, int, int);
93 static void mention (struct breakpoint *);
95 struct breakpoint *set_raw_breakpoint (struct symtab_and_line, enum bptype);
97 static void check_duplicates (struct breakpoint *);
99 static void describe_other_breakpoints (CORE_ADDR, asection *);
101 static void breakpoints_info (char *, int);
103 static void breakpoint_1 (int, int);
105 static bpstat bpstat_alloc (struct breakpoint *, bpstat);
107 static int breakpoint_cond_eval (PTR);
109 static void cleanup_executing_breakpoints (PTR);
111 static void commands_command (char *, int);
113 static void condition_command (char *, int);
115 static int get_number_trailer (char **, int);
117 void set_breakpoint_count (int);
120 static struct breakpoint *create_temp_exception_breakpoint (CORE_ADDR);
130 static int remove_breakpoint (struct breakpoint *, insertion_state_t);
132 static enum print_stop_action print_it_typical (bpstat);
134 static enum print_stop_action print_bp_stop_message (bpstat bs);
138 enum exception_event_kind kind;
141 args_for_catchpoint_enable;
143 static int watchpoint_check (PTR);
145 static int cover_target_enable_exception_callback (PTR);
147 static void maintenance_info_breakpoints (char *, int);
149 #ifdef GET_LONGJMP_TARGET
150 static void create_longjmp_breakpoint (char *);
153 static int hw_breakpoint_used_count (void);
155 static int hw_watchpoint_used_count (enum bptype, int *);
157 static void hbreak_command (char *, int);
159 static void thbreak_command (char *, int);
161 static void watch_command_1 (char *, int, int);
163 static void rwatch_command (char *, int);
165 static void awatch_command (char *, int);
167 static void do_enable_breakpoint (struct breakpoint *, enum bpdisp);
169 static void solib_load_unload_1 (char *hookname,
172 char *cond_string, enum bptype bp_kind);
174 static void create_fork_vfork_event_catchpoint (int tempflag,
176 enum bptype bp_kind);
178 static void break_at_finish_at_depth_command_1 (char *arg,
179 int flag, int from_tty);
181 static void break_at_finish_command_1 (char *arg, int flag, int from_tty);
183 static void stop_command (char *arg, int from_tty);
185 static void stopin_command (char *arg, int from_tty);
187 static void stopat_command (char *arg, int from_tty);
189 static char *ep_find_event_name_end (char *arg);
191 static char *ep_parse_optional_if_clause (char **arg);
193 static char *ep_parse_optional_filename (char **arg);
195 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
196 static void catch_exec_command_1 (char *arg, int tempflag, int from_tty);
199 static void create_exception_catchpoint (int tempflag, char *cond_string,
200 enum exception_event_kind ex_event,
201 struct symtab_and_line *sal);
203 static void catch_exception_command_1 (enum exception_event_kind ex_event,
204 char *arg, int tempflag, int from_tty);
206 static void tcatch_command (char *arg, int from_tty);
208 static void ep_skip_leading_whitespace (char **s);
210 /* Prototypes for exported functions. */
212 /* If FALSE, gdb will not use hardware support for watchpoints, even
213 if such is available. */
214 static int can_use_hw_watchpoints;
216 void _initialize_breakpoint (void);
218 extern int addressprint; /* Print machine addresses? */
220 static int internal_breakpoint_number = -1;
222 /* Are we executing breakpoint commands? */
223 static int executing_breakpoint_commands;
225 /* Walk the following statement or block through all breakpoints.
226 ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
229 #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next)
231 #define ALL_BREAKPOINTS_SAFE(B,TMP) \
232 for (B = breakpoint_chain; \
233 B ? (TMP=B->next, 1): 0; \
236 /* True if SHIFT_INST_REGS defined, false otherwise. */
238 int must_shift_inst_regs =
239 #if defined(SHIFT_INST_REGS)
246 /* True if breakpoint hit counts should be displayed in breakpoint info. */
248 int show_breakpoint_hit_counts = 1;
250 /* Chain of all breakpoints defined. */
252 struct breakpoint *breakpoint_chain;
254 /* Number of last breakpoint made. */
256 int breakpoint_count;
258 /* Pointer to current exception event record */
259 static struct exception_event_record *current_exception_event;
261 /* Indicator of whether exception catchpoints should be nuked
262 between runs of a program */
263 int exception_catchpoints_are_fragile = 0;
265 /* Indicator of when exception catchpoints set-up should be
266 reinitialized -- e.g. when program is re-run */
267 int exception_support_initialized = 0;
269 /* This function returns a pointer to the string representation of the
270 pathname of the dynamically-linked library that has just been
273 This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
274 or undefined results are guaranteed.
276 This string's contents are only valid immediately after the
277 inferior has stopped in the dynamic linker hook, and becomes
278 invalid as soon as the inferior is continued. Clients should make
279 a copy of this string if they wish to continue the inferior and
280 then access the string. */
282 #ifndef SOLIB_LOADED_LIBRARY_PATHNAME
283 #define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
286 /* This function returns a pointer to the string representation of the
287 pathname of the dynamically-linked library that has just been
290 This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
291 TRUE, or undefined results are guaranteed.
293 This string's contents are only valid immediately after the
294 inferior has stopped in the dynamic linker hook, and becomes
295 invalid as soon as the inferior is continued. Clients should make
296 a copy of this string if they wish to continue the inferior and
297 then access the string. */
299 #ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
300 #define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
303 /* This function is called by the "catch load" command. It allows the
304 debugger to be notified by the dynamic linker when a specified
305 library file (or any library file, if filename is NULL) is loaded. */
307 #ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
308 #define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
309 error ("catch of library loads not yet implemented on this platform")
312 /* This function is called by the "catch unload" command. It allows
313 the debugger to be notified by the dynamic linker when a specified
314 library file (or any library file, if filename is NULL) is
317 #ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
318 #define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \
319 error ("catch of library unloads not yet implemented on this platform")
322 /* Set breakpoint count to NUM. */
325 set_breakpoint_count (int num)
327 breakpoint_count = num;
328 set_internalvar (lookup_internalvar ("bpnum"),
329 value_from_longest (builtin_type_int, (LONGEST) num));
332 /* Used in run_command to zero the hit count when a new run starts. */
335 clear_breakpoint_hit_counts (void)
337 struct breakpoint *b;
343 /* Default address, symtab and line to put a breakpoint at
344 for "break" command with no arg.
345 if default_breakpoint_valid is zero, the other three are
346 not valid, and "break" with no arg is an error.
348 This set by print_stack_frame, which calls set_default_breakpoint. */
350 int default_breakpoint_valid;
351 CORE_ADDR default_breakpoint_address;
352 struct symtab *default_breakpoint_symtab;
353 int default_breakpoint_line;
355 /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
356 Advance *PP after the string and any trailing whitespace.
358 Currently the string can either be a number or "$" followed by the name
359 of a convenience variable. Making it an expression wouldn't work well
360 for map_breakpoint_numbers (e.g. "4 + 5 + 6").
362 TRAILER is a character which can be found after the number; most
363 commonly this is `-'. If you don't want a trailer, use \0. */
365 get_number_trailer (char **pp, int trailer)
367 int retval = 0; /* default */
371 /* Empty line means refer to the last breakpoint. */
372 return breakpoint_count;
375 /* Make a copy of the name, so we can null-terminate it
376 to pass to lookup_internalvar(). */
381 while (isalnum (*p) || *p == '_')
383 varname = (char *) alloca (p - start + 1);
384 strncpy (varname, start, p - start);
385 varname[p - start] = '\0';
386 val = value_of_internalvar (lookup_internalvar (varname));
387 if (TYPE_CODE (VALUE_TYPE (val)) == TYPE_CODE_INT)
388 retval = (int) value_as_long (val);
391 printf_filtered ("Convenience variable must have integer value.\n");
399 while (*p >= '0' && *p <= '9')
402 /* There is no number here. (e.g. "cond a == b"). */
404 /* Skip non-numeric token */
405 while (*p && !isspace((int) *p))
407 /* Return zero, which caller must interpret as error. */
413 if (!(isspace (*p) || *p == '\0' || *p == trailer))
415 /* Trailing junk: return 0 and let caller print error msg. */
416 while (!(isspace (*p) || *p == '\0' || *p == trailer))
427 /* Like get_number_trailer, but don't allow a trailer. */
429 get_number (char **pp)
431 return get_number_trailer (pp, '\0');
434 /* Parse a number or a range.
435 * A number will be of the form handled by get_number.
436 * A range will be of the form <number1> - <number2>, and
437 * will represent all the integers between number1 and number2,
440 * While processing a range, this fuction is called iteratively;
441 * At each call it will return the next value in the range.
443 * At the beginning of parsing a range, the char pointer PP will
444 * be advanced past <number1> and left pointing at the '-' token.
445 * Subsequent calls will not advance the pointer until the range
446 * is completed. The call that completes the range will advance
447 * pointer PP past <number2>.
451 get_number_or_range (char **pp)
453 static int last_retval, end_value;
454 static char *end_ptr;
455 static int in_range = 0;
459 /* Default case: pp is pointing either to a solo number,
460 or to the first number of a range. */
461 last_retval = get_number_trailer (pp, '-');
466 /* This is the start of a range (<number1> - <number2>).
467 Skip the '-', parse and remember the second number,
468 and also remember the end of the final token. */
472 while (isspace ((int) *end_ptr))
473 end_ptr++; /* skip white space */
474 end_value = get_number (temp);
475 if (end_value < last_retval)
477 error ("inverted range");
479 else if (end_value == last_retval)
481 /* degenerate range (number1 == number2). Advance the
482 token pointer so that the range will be treated as a
491 error ("negative value");
494 /* pp points to the '-' that betokens a range. All
495 number-parsing has already been done. Return the next
496 integer value (one greater than the saved previous value).
497 Do not advance the token pointer 'pp' until the end of range
500 if (++last_retval == end_value)
502 /* End of range reached; advance token pointer. */
512 /* condition N EXP -- set break condition of breakpoint N to EXP. */
515 condition_command (char *arg, int from_tty)
517 register struct breakpoint *b;
522 error_no_arg ("breakpoint number");
525 bnum = get_number (&p);
527 error ("Bad breakpoint argument: '%s'", arg);
530 if (b->number == bnum)
537 if (b->cond_string != NULL)
538 xfree (b->cond_string);
543 b->cond_string = NULL;
545 printf_filtered ("Breakpoint %d now unconditional.\n", bnum);
550 /* I don't know if it matters whether this is the string the user
551 typed in or the decompiled expression. */
552 b->cond_string = savestring (arg, strlen (arg));
553 b->cond = parse_exp_1 (&arg, block_for_pc (b->address), 0);
555 error ("Junk at end of expression");
557 breakpoints_changed ();
561 error ("No breakpoint number %d.", bnum);
566 commands_command (char *arg, int from_tty)
568 register struct breakpoint *b;
571 struct command_line *l;
573 /* If we allowed this, we would have problems with when to
574 free the storage, if we change the commands currently
577 if (executing_breakpoint_commands)
578 error ("Can't use the \"commands\" command among a breakpoint's commands.");
581 bnum = get_number (&p);
584 error ("Unexpected extra arguments following breakpoint number.");
587 if (b->number == bnum)
591 "Type commands for when breakpoint %d is hit, one per line.",
593 l = read_command_lines (tmpbuf, from_tty);
594 free_command_lines (&b->commands);
596 breakpoints_changed ();
599 error ("No breakpoint number %d.", bnum);
602 /* Like target_read_memory() but if breakpoints are inserted, return
603 the shadow contents instead of the breakpoints themselves.
605 Read "memory data" from whatever target or inferior we have.
606 Returns zero if successful, errno value if not. EIO is used
607 for address out of bounds. If breakpoints are inserted, returns
608 shadow contents, not the breakpoints themselves. From breakpoint.c. */
611 read_memory_nobpt (CORE_ADDR memaddr, char *myaddr, unsigned len)
614 struct breakpoint *b;
615 CORE_ADDR bp_addr = 0;
618 if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL)
619 /* No breakpoints on this machine. */
620 return target_read_memory (memaddr, myaddr, len);
624 if (b->type == bp_none)
625 warning ("reading through apparently deleted breakpoint #%d?",
628 /* memory breakpoint? */
629 if (b->type == bp_watchpoint
630 || b->type == bp_hardware_watchpoint
631 || b->type == bp_read_watchpoint
632 || b->type == bp_access_watchpoint)
637 /* Addresses and length of the part of the breakpoint that
639 /* XXXX The m68k, sh and h8300 have different local and remote
640 breakpoint values. BREAKPOINT_FROM_PC still manages to
641 correctly determine the breakpoints memory address and size
642 for these targets. */
643 bp_addr = b->address;
645 if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL)
650 if (bp_addr + bp_size <= memaddr)
651 /* The breakpoint is entirely before the chunk of memory we
654 if (bp_addr >= memaddr + len)
655 /* The breakpoint is entirely after the chunk of memory we are
658 /* Copy the breakpoint from the shadow contents, and recurse for
659 the things before and after. */
661 /* Offset within shadow_contents. */
664 if (bp_addr < memaddr)
666 /* Only copy the second part of the breakpoint. */
667 bp_size -= memaddr - bp_addr;
668 bptoffset = memaddr - bp_addr;
672 if (bp_addr + bp_size > memaddr + len)
674 /* Only copy the first part of the breakpoint. */
675 bp_size -= (bp_addr + bp_size) - (memaddr + len);
678 memcpy (myaddr + bp_addr - memaddr,
679 b->shadow_contents + bptoffset, bp_size);
681 if (bp_addr > memaddr)
683 /* Copy the section of memory before the breakpoint. */
684 status = read_memory_nobpt (memaddr, myaddr, bp_addr - memaddr);
689 if (bp_addr + bp_size < memaddr + len)
691 /* Copy the section of memory after the breakpoint. */
692 status = read_memory_nobpt (bp_addr + bp_size,
693 myaddr + bp_addr + bp_size - memaddr,
694 memaddr + len - (bp_addr + bp_size));
701 /* Nothing overlaps. Just call read_memory_noerr. */
702 return target_read_memory (memaddr, myaddr, len);
706 /* insert_breakpoints is used when starting or continuing the program.
707 remove_breakpoints is used when the program stops.
708 Both return zero if successful,
709 or an `errno' value if could not write the inferior. */
712 insert_breakpoints (void)
714 register struct breakpoint *b, *temp;
715 int return_val = 0; /* return success code. */
717 int disabled_breaks = 0;
719 static char message1[] = "Error inserting catchpoint %d:\n";
720 static char message[sizeof (message1) + 30];
723 ALL_BREAKPOINTS_SAFE (b, temp)
725 if (b->enable == permanent)
726 /* Permanent breakpoints cannot be inserted or removed. */
728 else if (b->type != bp_watchpoint
729 && b->type != bp_hardware_watchpoint
730 && b->type != bp_read_watchpoint
731 && b->type != bp_access_watchpoint
732 && b->type != bp_catch_fork
733 && b->type != bp_catch_vfork
734 && b->type != bp_catch_exec
735 && b->type != bp_catch_throw
736 && b->type != bp_catch_catch
737 && b->enable != disabled
738 && b->enable != shlib_disabled
739 && b->enable != call_disabled
743 if (b->type == bp_hardware_breakpoint)
744 val = target_insert_hw_breakpoint (b->address, b->shadow_contents);
747 /* Check to see if breakpoint is in an overlay section;
748 if so, we should set the breakpoint at the LMA address.
749 Only if the section is currently mapped should we ALSO
750 set a break at the VMA address. */
751 if (overlay_debugging && b->section &&
752 section_is_overlay (b->section))
756 addr = overlay_unmapped_address (b->address, b->section);
757 val = target_insert_breakpoint (addr, b->shadow_contents);
758 /* This would be the time to check val, to see if the
759 breakpoint write to the load address succeeded.
760 However, this might be an ordinary occurrance, eg. if
761 the unmapped overlay is in ROM. */
762 val = 0; /* in case unmapped address failed */
763 if (section_is_mapped (b->section))
764 val = target_insert_breakpoint (b->address,
767 else /* ordinary (non-overlay) address */
768 val = target_insert_breakpoint (b->address, b->shadow_contents);
772 /* Can't set the breakpoint. */
773 #if defined (DISABLE_UNSETTABLE_BREAK)
774 if (DISABLE_UNSETTABLE_BREAK (b->address))
776 /* See also: disable_breakpoints_in_shlibs. */
778 b->enable = shlib_disabled;
779 if (!disabled_breaks)
781 target_terminal_ours_for_output ();
782 warning ("Cannot insert breakpoint %d:", b->number);
783 warning ("Temporarily disabling shared library breakpoints:");
786 warning ("breakpoint #%d ", b->number);
791 target_terminal_ours_for_output ();
792 warning ("Cannot insert breakpoint %d:", b->number);
793 #ifdef ONE_PROCESS_WRITETEXT
794 warning ("The same program may be running in another process.");
796 memory_error (val, b->address); /* which bombs us out */
803 return_val = val; /* remember failure */
805 else if (ep_is_exception_catchpoint (b)
806 && b->enable != disabled
807 && b->enable != shlib_disabled
808 && b->enable != call_disabled
813 /* If we get here, we must have a callback mechanism for exception
814 events -- with g++ style embedded label support, we insert
815 ordinary breakpoints and not catchpoints. */
816 /* Format possible error message */
817 sprintf (message, message1, b->number);
819 val = target_insert_breakpoint (b->address, b->shadow_contents);
822 /* Couldn't set breakpoint for some reason */
823 target_terminal_ours_for_output ();
824 warning ("Cannot insert catchpoint %d; disabling it.",
826 b->enable = disabled;
830 /* Bp set, now make sure callbacks are enabled */
832 args_for_catchpoint_enable args;
833 args.kind = b->type == bp_catch_catch ?
834 EX_EVENT_CATCH : EX_EVENT_THROW;
836 val = catch_errors (cover_target_enable_exception_callback,
838 message, RETURN_MASK_ALL);
839 if (val != 0 && val != -1)
843 /* Check if something went wrong; val == 0 can be ignored */
846 /* something went wrong */
847 target_terminal_ours_for_output ();
848 warning ("Cannot insert catchpoint %d; disabling it.",
850 b->enable = disabled;
855 return_val = val; /* remember failure */
858 else if ((b->type == bp_hardware_watchpoint ||
859 b->type == bp_read_watchpoint ||
860 b->type == bp_access_watchpoint)
861 && b->enable == enabled
862 && b->disposition != del_at_next_stop
866 struct frame_info *saved_frame;
867 int saved_level, within_current_scope;
868 value_ptr mark = value_mark ();
871 /* Save the current frame and level so we can restore it after
872 evaluating the watchpoint expression on its own frame. */
873 saved_frame = selected_frame;
874 saved_level = selected_frame_level;
876 /* Determine if the watchpoint is within scope. */
877 if (b->exp_valid_block == NULL)
878 within_current_scope = 1;
881 struct frame_info *fi;
883 /* There might be no current frame at this moment if we are
884 resuming from a step over a breakpoint.
885 Set up current frame before trying to find the watchpoint
887 get_current_frame ();
888 fi = find_frame_addr_in_frame_chain (b->watchpoint_frame);
889 within_current_scope = (fi != NULL);
890 if (within_current_scope)
891 select_frame (fi, -1);
894 if (within_current_scope)
896 /* Evaluate the expression and cut the chain of values
897 produced off from the value chain.
899 Make sure the value returned isn't lazy; we use
900 laziness to determine what memory GDB actually needed
901 in order to compute the value of the expression. */
902 v = evaluate_expression (b->exp);
904 value_release_to_mark (mark);
909 /* Look at each value on the value chain. */
910 for (; v; v = v->next)
912 /* If it's a memory location, and GDB actually needed
913 its contents to evaluate the expression, then we
915 if (VALUE_LVAL (v) == lval_memory
918 struct type *vtype = check_typedef (VALUE_TYPE (v));
920 /* We only watch structs and arrays if user asked
921 for it explicitly, never if they just happen to
922 appear in the middle of some value chain. */
923 if (v == b->val_chain
924 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
925 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
930 addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
931 len = TYPE_LENGTH (VALUE_TYPE (v));
933 if (b->type == bp_read_watchpoint)
935 else if (b->type == bp_access_watchpoint)
938 val = target_insert_watchpoint (addr, len, type);
941 /* Don't exit the loop, try to insert
942 every value on the value chain. That's
943 because we will be removing all the
944 watches below, and removing a
945 watchpoint we didn't insert could have
953 /* Failure to insert a watchpoint on any memory value in the
954 value chain brings us here. */
957 remove_breakpoint (b, mark_uninserted);
958 warning ("Could not insert hardware watchpoint %d.",
965 printf_filtered ("Hardware watchpoint %d deleted ", b->number);
966 printf_filtered ("because the program has left the block \n");
967 printf_filtered ("in which its expression is valid.\n");
968 if (b->related_breakpoint)
969 b->related_breakpoint->disposition = del_at_next_stop;
970 b->disposition = del_at_next_stop;
973 /* Restore the frame and level. */
974 if ((saved_frame != selected_frame) ||
975 (saved_level != selected_frame_level))
976 select_frame (saved_frame, saved_level);
979 return_val = val; /* remember failure */
981 else if ((b->type == bp_catch_fork
982 || b->type == bp_catch_vfork
983 || b->type == bp_catch_exec)
984 && b->enable == enabled
992 val = target_insert_fork_catchpoint (PIDGET (inferior_ptid));
995 val = target_insert_vfork_catchpoint (PIDGET (inferior_ptid));
998 val = target_insert_exec_catchpoint (PIDGET (inferior_ptid));
1001 warning ("Internal error, %s line %d.", __FILE__, __LINE__);
1006 target_terminal_ours_for_output ();
1007 warning ("Cannot insert catchpoint %d.", b->number);
1013 return_val = val; /* remember failure */
1022 remove_breakpoints (void)
1024 register struct breakpoint *b;
1031 val = remove_breakpoint (b, mark_uninserted);
1040 remove_hw_watchpoints (void)
1042 register struct breakpoint *b;
1048 && (b->type == bp_hardware_watchpoint
1049 || b->type == bp_read_watchpoint
1050 || b->type == bp_access_watchpoint))
1052 val = remove_breakpoint (b, mark_uninserted);
1061 reattach_breakpoints (int pid)
1063 register struct breakpoint *b;
1065 struct cleanup *old_chain = save_inferior_ptid ();
1067 /* Set inferior_ptid; remove_breakpoint uses this global. */
1068 inferior_ptid = pid_to_ptid (pid);
1073 remove_breakpoint (b, mark_inserted);
1074 if (b->type == bp_hardware_breakpoint)
1075 val = target_insert_hw_breakpoint (b->address, b->shadow_contents);
1077 val = target_insert_breakpoint (b->address, b->shadow_contents);
1080 do_cleanups (old_chain);
1085 do_cleanups (old_chain);
1090 update_breakpoints_after_exec (void)
1092 struct breakpoint *b;
1093 struct breakpoint *temp;
1095 /* Doing this first prevents the badness of having delete_breakpoint()
1096 write a breakpoint's current "shadow contents" to lift the bp. That
1097 shadow is NOT valid after an exec()! */
1098 mark_breakpoints_out ();
1100 ALL_BREAKPOINTS_SAFE (b, temp)
1102 /* Solib breakpoints must be explicitly reset after an exec(). */
1103 if (b->type == bp_shlib_event)
1105 delete_breakpoint (b);
1109 /* Thread event breakpoints must be set anew after an exec(). */
1110 if (b->type == bp_thread_event)
1112 delete_breakpoint (b);
1116 /* Step-resume breakpoints are meaningless after an exec(). */
1117 if (b->type == bp_step_resume)
1119 delete_breakpoint (b);
1123 /* Ditto the sigtramp handler breakpoints. */
1124 if (b->type == bp_through_sigtramp)
1126 delete_breakpoint (b);
1130 /* Ditto the exception-handling catchpoints. */
1131 if ((b->type == bp_catch_catch) || (b->type == bp_catch_throw))
1133 delete_breakpoint (b);
1137 /* Don't delete an exec catchpoint, because else the inferior
1138 won't stop when it ought!
1140 Similarly, we probably ought to keep vfork catchpoints, 'cause
1141 on this target, we may not be able to stop when the vfork is
1142 seen, but only when the subsequent exec is seen. (And because
1143 deleting fork catchpoints here but not vfork catchpoints will
1144 seem mysterious to users, keep those too.)
1146 ??rehrauer: Let's hope that merely clearing out this catchpoint's
1147 target address field, if any, is sufficient to have it be reset
1148 automagically. Certainly on HP-UX that's true.
1150 Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
1151 valid code address on some platforms (like the mn10200 and
1152 mn10300 simulators). We shouldn't assign any special
1153 interpretation to a breakpoint with a zero address. And in
1154 fact, GDB doesn't --- I can't see what that comment above is
1155 talking about. As far as I can tell, setting the address of a
1156 bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
1157 is meaningless, since those are implemented with HP-UX kernel
1158 hackery, not by storing breakpoint instructions somewhere. */
1159 if ((b->type == bp_catch_exec) ||
1160 (b->type == bp_catch_vfork) ||
1161 (b->type == bp_catch_fork))
1163 b->address = (CORE_ADDR) NULL;
1167 /* bp_finish is a special case. The only way we ought to be able
1168 to see one of these when an exec() has happened, is if the user
1169 caught a vfork, and then said "finish". Ordinarily a finish just
1170 carries them to the call-site of the current callee, by setting
1171 a temporary bp there and resuming. But in this case, the finish
1172 will carry them entirely through the vfork & exec.
1174 We don't want to allow a bp_finish to remain inserted now. But
1175 we can't safely delete it, 'cause finish_command has a handle to
1176 the bp on a bpstat, and will later want to delete it. There's a
1177 chance (and I've seen it happen) that if we delete the bp_finish
1178 here, that its storage will get reused by the time finish_command
1179 gets 'round to deleting the "use to be a bp_finish" breakpoint.
1180 We really must allow finish_command to delete a bp_finish.
1182 In the absense of a general solution for the "how do we know
1183 it's safe to delete something others may have handles to?"
1184 problem, what we'll do here is just uninsert the bp_finish, and
1185 let finish_command delete it.
1187 (We know the bp_finish is "doomed" in the sense that it's
1188 momentary, and will be deleted as soon as finish_command sees
1189 the inferior stopped. So it doesn't matter that the bp's
1190 address is probably bogus in the new a.out, unlike e.g., the
1191 solib breakpoints.) */
1193 if (b->type == bp_finish)
1198 /* Without a symbolic address, we have little hope of the
1199 pre-exec() address meaning the same thing in the post-exec()
1201 if (b->addr_string == NULL)
1203 delete_breakpoint (b);
1207 /* If this breakpoint has survived the above battery of checks, then
1208 it must have a symbolic address. Be sure that it gets reevaluated
1209 to a target address, rather than reusing the old evaluation.
1211 Jim Blandy <jimb@redhat.com>: As explained above in the comment
1212 for bp_catch_exec and friends, I'm pretty sure this is entirely
1213 unnecessary. A call to breakpoint_re_set_one always recomputes
1214 the breakpoint's address from scratch, or deletes it if it can't.
1215 So I think this assignment could be deleted without effect. */
1216 b->address = (CORE_ADDR) NULL;
1221 detach_breakpoints (int pid)
1223 register struct breakpoint *b;
1225 struct cleanup *old_chain = save_inferior_ptid ();
1227 if (pid == PIDGET (inferior_ptid))
1228 error ("Cannot detach breakpoints of inferior_ptid");
1230 /* Set inferior_ptid; remove_breakpoint uses this global. */
1231 inferior_ptid = pid_to_ptid (pid);
1236 val = remove_breakpoint (b, mark_inserted);
1239 do_cleanups (old_chain);
1244 do_cleanups (old_chain);
1249 remove_breakpoint (struct breakpoint *b, insertion_state_t is)
1253 if (b->enable == permanent)
1254 /* Permanent breakpoints cannot be inserted or removed. */
1257 if (b->type == bp_none)
1258 warning ("attempted to remove apparently deleted breakpoint #%d?",
1261 if (b->type != bp_watchpoint
1262 && b->type != bp_hardware_watchpoint
1263 && b->type != bp_read_watchpoint
1264 && b->type != bp_access_watchpoint
1265 && b->type != bp_catch_fork
1266 && b->type != bp_catch_vfork
1267 && b->type != bp_catch_exec
1268 && b->type != bp_catch_catch
1269 && b->type != bp_catch_throw)
1271 if (b->type == bp_hardware_breakpoint)
1272 val = target_remove_hw_breakpoint (b->address, b->shadow_contents);
1275 /* Check to see if breakpoint is in an overlay section;
1276 if so, we should remove the breakpoint at the LMA address.
1277 If that is not equal to the raw address, then we should
1278 presumably remove the breakpoint there as well. */
1279 if (overlay_debugging && b->section &&
1280 section_is_overlay (b->section))
1284 addr = overlay_unmapped_address (b->address, b->section);
1285 val = target_remove_breakpoint (addr, b->shadow_contents);
1286 /* This would be the time to check val, to see if the
1287 shadow breakpoint write to the load address succeeded.
1288 However, this might be an ordinary occurrance, eg. if
1289 the unmapped overlay is in ROM. */
1290 val = 0; /* in case unmapped address failed */
1291 if (section_is_mapped (b->section))
1292 val = target_remove_breakpoint (b->address,
1293 b->shadow_contents);
1295 else /* ordinary (non-overlay) address */
1296 val = target_remove_breakpoint (b->address, b->shadow_contents);
1300 b->inserted = (is == mark_inserted);
1302 else if ((b->type == bp_hardware_watchpoint ||
1303 b->type == bp_read_watchpoint ||
1304 b->type == bp_access_watchpoint)
1305 && b->enable == enabled
1310 b->inserted = (is == mark_inserted);
1311 /* Walk down the saved value chain. */
1312 for (v = b->val_chain; v; v = v->next)
1314 /* For each memory reference remove the watchpoint
1316 if (VALUE_LVAL (v) == lval_memory
1317 && ! VALUE_LAZY (v))
1319 struct type *vtype = check_typedef (VALUE_TYPE (v));
1321 if (v == b->val_chain
1322 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
1323 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
1328 addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
1329 len = TYPE_LENGTH (VALUE_TYPE (v));
1331 if (b->type == bp_read_watchpoint)
1333 else if (b->type == bp_access_watchpoint)
1336 val = target_remove_watchpoint (addr, len, type);
1343 /* Failure to remove any of the hardware watchpoints comes here. */
1344 if ((is == mark_uninserted) && (b->inserted))
1345 warning ("Could not remove hardware watchpoint %d.",
1348 /* Free the saved value chain. We will construct a new one
1349 the next time the watchpoint is inserted. */
1350 for (v = b->val_chain; v; v = n)
1355 b->val_chain = NULL;
1357 else if ((b->type == bp_catch_fork ||
1358 b->type == bp_catch_vfork ||
1359 b->type == bp_catch_exec)
1360 && b->enable == enabled
1367 val = target_remove_fork_catchpoint (PIDGET (inferior_ptid));
1369 case bp_catch_vfork:
1370 val = target_remove_vfork_catchpoint (PIDGET (inferior_ptid));
1373 val = target_remove_exec_catchpoint (PIDGET (inferior_ptid));
1376 warning ("Internal error, %s line %d.", __FILE__, __LINE__);
1381 b->inserted = (is == mark_inserted);
1383 else if ((b->type == bp_catch_catch ||
1384 b->type == bp_catch_throw)
1385 && b->enable == enabled
1389 val = target_remove_breakpoint (b->address, b->shadow_contents);
1392 b->inserted = (is == mark_inserted);
1394 else if (ep_is_exception_catchpoint (b)
1395 && b->inserted /* sometimes previous insert doesn't happen */
1396 && b->enable == enabled
1400 val = target_remove_breakpoint (b->address, b->shadow_contents);
1404 b->inserted = (is == mark_inserted);
1410 /* Clear the "inserted" flag in all breakpoints. */
1413 mark_breakpoints_out (void)
1415 register struct breakpoint *b;
1421 /* Clear the "inserted" flag in all breakpoints and delete any
1422 breakpoints which should go away between runs of the program.
1424 Plus other such housekeeping that has to be done for breakpoints
1427 Note: this function gets called at the end of a run (by
1428 generic_mourn_inferior) and when a run begins (by
1429 init_wait_for_inferior). */
1434 breakpoint_init_inferior (enum inf_context context)
1436 register struct breakpoint *b, *temp;
1437 static int warning_needed = 0;
1439 ALL_BREAKPOINTS_SAFE (b, temp)
1446 case bp_watchpoint_scope:
1448 /* If the call dummy breakpoint is at the entry point it will
1449 cause problems when the inferior is rerun, so we better
1452 Also get rid of scope breakpoints. */
1453 delete_breakpoint (b);
1457 case bp_hardware_watchpoint:
1458 case bp_read_watchpoint:
1459 case bp_access_watchpoint:
1461 /* Likewise for watchpoints on local expressions. */
1462 if (b->exp_valid_block != NULL)
1463 delete_breakpoint (b);
1466 /* Likewise for exception catchpoints in dynamic-linked
1467 executables where required */
1468 if (ep_is_exception_catchpoint (b) &&
1469 exception_catchpoints_are_fragile)
1472 delete_breakpoint (b);
1478 if (exception_catchpoints_are_fragile)
1479 exception_support_initialized = 0;
1481 /* Don't issue the warning unless it's really needed... */
1482 if (warning_needed && (context != inf_exited))
1484 warning ("Exception catchpoints from last run were deleted.");
1485 warning ("You must reinsert them explicitly.");
1490 /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
1491 exists at PC. It returns ordinary_breakpoint_here if it's an
1492 ordinary breakpoint, or permanent_breakpoint_here if it's a
1493 permanent breakpoint.
1494 - When continuing from a location with an ordinary breakpoint, we
1495 actually single step once before calling insert_breakpoints.
1496 - When continuing from a localion with a permanent breakpoint, we
1497 need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
1498 the target, to advance the PC past the breakpoint. */
1500 enum breakpoint_here
1501 breakpoint_here_p (CORE_ADDR pc)
1503 register struct breakpoint *b;
1504 int any_breakpoint_here = 0;
1507 if ((b->enable == enabled
1508 || b->enable == permanent)
1509 && b->address == pc) /* bp is enabled and matches pc */
1511 if (overlay_debugging &&
1512 section_is_overlay (b->section) &&
1513 !section_is_mapped (b->section))
1514 continue; /* unmapped overlay -- can't be a match */
1515 else if (b->enable == permanent)
1516 return permanent_breakpoint_here;
1518 any_breakpoint_here = 1;
1521 return any_breakpoint_here ? ordinary_breakpoint_here : 0;
1525 /* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
1526 but it only returns true if there is actually a breakpoint inserted
1530 breakpoint_inserted_here_p (CORE_ADDR pc)
1532 register struct breakpoint *b;
1536 && b->address == pc) /* bp is inserted and matches pc */
1538 if (overlay_debugging &&
1539 section_is_overlay (b->section) &&
1540 !section_is_mapped (b->section))
1541 continue; /* unmapped overlay -- can't be a match */
1549 /* Return nonzero if FRAME is a dummy frame. We can't use
1550 PC_IN_CALL_DUMMY because figuring out the saved SP would take too
1551 much time, at least using get_saved_register on the 68k. This
1552 means that for this function to work right a port must use the
1553 bp_call_dummy breakpoint. */
1556 frame_in_dummy (struct frame_info *frame)
1558 struct breakpoint *b;
1563 if (USE_GENERIC_DUMMY_FRAMES)
1564 return generic_pc_in_call_dummy (frame->pc, frame->frame, frame->frame);
1568 if (b->type == bp_call_dummy
1569 && b->frame == frame->frame
1570 /* We need to check the PC as well as the frame on the sparc,
1571 for signals.exp in the testsuite. */
1574 - SIZEOF_CALL_DUMMY_WORDS / sizeof (LONGEST) * REGISTER_SIZE))
1575 && frame->pc <= b->address)
1581 /* breakpoint_thread_match (PC, PID) returns true if the breakpoint at
1582 PC is valid for process/thread PID. */
1585 breakpoint_thread_match (CORE_ADDR pc, ptid_t ptid)
1587 struct breakpoint *b;
1590 thread = pid_to_thread_id (ptid);
1593 if (b->enable != disabled
1594 && b->enable != shlib_disabled
1595 && b->enable != call_disabled
1597 && (b->thread == -1 || b->thread == thread))
1599 if (overlay_debugging &&
1600 section_is_overlay (b->section) &&
1601 !section_is_mapped (b->section))
1602 continue; /* unmapped overlay -- can't be a match */
1611 /* bpstat stuff. External routines' interfaces are documented
1615 ep_is_catchpoint (struct breakpoint *ep)
1618 (ep->type == bp_catch_load)
1619 || (ep->type == bp_catch_unload)
1620 || (ep->type == bp_catch_fork)
1621 || (ep->type == bp_catch_vfork)
1622 || (ep->type == bp_catch_exec)
1623 || (ep->type == bp_catch_catch)
1624 || (ep->type == bp_catch_throw);
1626 /* ??rehrauer: Add more kinds here, as are implemented... */
1630 ep_is_shlib_catchpoint (struct breakpoint *ep)
1633 (ep->type == bp_catch_load)
1634 || (ep->type == bp_catch_unload);
1638 ep_is_exception_catchpoint (struct breakpoint *ep)
1641 (ep->type == bp_catch_catch)
1642 || (ep->type == bp_catch_throw);
1645 /* Clear a bpstat so that it says we are not at any breakpoint.
1646 Also free any storage that is part of a bpstat. */
1649 bpstat_clear (bpstat *bsp)
1660 if (p->old_val != NULL)
1661 value_free (p->old_val);
1668 /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
1669 is part of the bpstat is copied as well. */
1672 bpstat_copy (bpstat bs)
1676 bpstat retval = NULL;
1681 for (; bs != NULL; bs = bs->next)
1683 tmp = (bpstat) xmalloc (sizeof (*tmp));
1684 memcpy (tmp, bs, sizeof (*tmp));
1686 /* This is the first thing in the chain. */
1696 /* Find the bpstat associated with this breakpoint */
1699 bpstat_find_breakpoint (bpstat bsp, struct breakpoint *breakpoint)
1704 for (; bsp != NULL; bsp = bsp->next)
1706 if (bsp->breakpoint_at == breakpoint)
1712 /* Find a step_resume breakpoint associated with this bpstat.
1713 (If there are multiple step_resume bp's on the list, this function
1714 will arbitrarily pick one.)
1716 It is an error to use this function if BPSTAT doesn't contain a
1717 step_resume breakpoint.
1719 See wait_for_inferior's use of this function. */
1721 bpstat_find_step_resume_breakpoint (bpstat bsp)
1726 error ("Internal error (bpstat_find_step_resume_breakpoint)");
1728 current_thread = pid_to_thread_id (inferior_ptid);
1730 for (; bsp != NULL; bsp = bsp->next)
1732 if ((bsp->breakpoint_at != NULL) &&
1733 (bsp->breakpoint_at->type == bp_step_resume) &&
1734 (bsp->breakpoint_at->thread == current_thread ||
1735 bsp->breakpoint_at->thread == -1))
1736 return bsp->breakpoint_at;
1739 error ("Internal error (no step_resume breakpoint found)");
1743 /* Return the breakpoint number of the first breakpoint we are stopped
1744 at. *BSP upon return is a bpstat which points to the remaining
1745 breakpoints stopped at (but which is not guaranteed to be good for
1746 anything but further calls to bpstat_num).
1747 Return 0 if passed a bpstat which does not indicate any breakpoints. */
1750 bpstat_num (bpstat *bsp)
1752 struct breakpoint *b;
1755 return 0; /* No more breakpoint values */
1758 b = (*bsp)->breakpoint_at;
1759 *bsp = (*bsp)->next;
1761 return -1; /* breakpoint that's been deleted since */
1763 return b->number; /* We have its number */
1767 /* Modify BS so that the actions will not be performed. */
1770 bpstat_clear_actions (bpstat bs)
1772 for (; bs != NULL; bs = bs->next)
1774 bs->commands = NULL;
1775 if (bs->old_val != NULL)
1777 value_free (bs->old_val);
1783 /* Stub for cleaning up our state if we error-out of a breakpoint command */
1786 cleanup_executing_breakpoints (PTR ignore)
1788 executing_breakpoint_commands = 0;
1791 /* Execute all the commands associated with all the breakpoints at this
1792 location. Any of these commands could cause the process to proceed
1793 beyond this point, etc. We look out for such changes by checking
1794 the global "breakpoint_proceeded" after each command. */
1797 bpstat_do_actions (bpstat *bsp)
1800 struct cleanup *old_chain;
1801 struct command_line *cmd;
1803 /* Avoid endless recursion if a `source' command is contained
1805 if (executing_breakpoint_commands)
1808 executing_breakpoint_commands = 1;
1809 old_chain = make_cleanup (cleanup_executing_breakpoints, 0);
1812 /* Note that (as of this writing), our callers all appear to
1813 be passing us the address of global stop_bpstat. And, if
1814 our calls to execute_control_command cause the inferior to
1815 proceed, that global (and hence, *bsp) will change.
1817 We must be careful to not touch *bsp unless the inferior
1818 has not proceeded. */
1820 /* This pointer will iterate over the list of bpstat's. */
1823 breakpoint_proceeded = 0;
1824 for (; bs != NULL; bs = bs->next)
1829 execute_control_command (cmd);
1831 if (breakpoint_proceeded)
1836 if (breakpoint_proceeded)
1837 /* The inferior is proceeded by the command; bomb out now.
1838 The bpstat chain has been blown away by wait_for_inferior.
1839 But since execution has stopped again, there is a new bpstat
1840 to look at, so start over. */
1843 bs->commands = NULL;
1846 executing_breakpoint_commands = 0;
1847 discard_cleanups (old_chain);
1850 /* This is the normal print function for a bpstat. In the future,
1851 much of this logic could (should?) be moved to bpstat_stop_status,
1852 by having it set different print_it values.
1854 Current scheme: When we stop, bpstat_print() is called. It loops
1855 through the bpstat list of things causing this stop, calling the
1856 print_bp_stop_message function on each one. The behavior of the
1857 print_bp_stop_message function depends on the print_it field of
1858 bpstat. If such field so indicates, call this function here.
1860 Return values from this routine (ultimately used by bpstat_print()
1861 and normal_stop() to decide what to do):
1862 PRINT_NOTHING: Means we already printed all we needed to print,
1863 don't print anything else.
1864 PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
1865 that something to be followed by a location.
1866 PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
1867 that something to be followed by a location.
1868 PRINT_UNKNOWN: Means we printed nothing or we need to do some more
1871 static enum print_stop_action
1872 print_it_typical (bpstat bs)
1875 struct cleanup *old_chain;
1876 struct ui_stream *stb;
1877 stb = ui_out_stream_new (uiout);
1878 old_chain = make_cleanup_ui_out_stream_delete (stb);
1880 /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
1881 which has since been deleted. */
1882 if (bs->breakpoint_at == NULL)
1883 return PRINT_UNKNOWN;
1885 switch (bs->breakpoint_at->type)
1888 case bp_hardware_breakpoint:
1890 annotate_breakpoint (bs->breakpoint_at->number);
1891 ui_out_text (uiout, "\nBreakpoint ");
1892 if (interpreter_p && strncmp (interpreter_p, "mi", 2) == 0)
1893 ui_out_field_string (uiout, "reason", "breakpoint-hit");
1894 ui_out_field_int (uiout, "bkptno", bs->breakpoint_at->number);
1895 ui_out_text (uiout, ", ");
1896 return PRINT_SRC_AND_LOC;
1898 /* I think the user probably only wants to see one breakpoint
1899 number, not all of them. */
1900 annotate_breakpoint (bs->breakpoint_at->number);
1901 printf_filtered ("\nBreakpoint %d, ", bs->breakpoint_at->number);
1902 return PRINT_SRC_AND_LOC;
1906 case bp_shlib_event:
1907 /* Did we stop because the user set the stop_on_solib_events
1908 variable? (If so, we report this as a generic, "Stopped due
1909 to shlib event" message.) */
1910 printf_filtered ("Stopped due to shared library event\n");
1911 return PRINT_NOTHING;
1914 case bp_thread_event:
1915 /* Not sure how we will get here.
1916 GDB should not stop for these breakpoints. */
1917 printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
1918 return PRINT_NOTHING;
1922 annotate_catchpoint (bs->breakpoint_at->number);
1923 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
1924 printf_filtered ("loaded");
1925 printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname);
1926 return PRINT_SRC_AND_LOC;
1929 case bp_catch_unload:
1930 annotate_catchpoint (bs->breakpoint_at->number);
1931 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
1932 printf_filtered ("unloaded");
1933 printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname);
1934 return PRINT_SRC_AND_LOC;
1938 annotate_catchpoint (bs->breakpoint_at->number);
1939 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
1940 printf_filtered ("forked");
1941 printf_filtered (" process %d), ",
1942 bs->breakpoint_at->forked_inferior_pid);
1943 return PRINT_SRC_AND_LOC;
1946 case bp_catch_vfork:
1947 annotate_catchpoint (bs->breakpoint_at->number);
1948 printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
1949 printf_filtered ("vforked");
1950 printf_filtered (" process %d), ",
1951 bs->breakpoint_at->forked_inferior_pid);
1952 return PRINT_SRC_AND_LOC;
1956 annotate_catchpoint (bs->breakpoint_at->number);
1957 printf_filtered ("\nCatchpoint %d (exec'd %s), ",
1958 bs->breakpoint_at->number,
1959 bs->breakpoint_at->exec_pathname);
1960 return PRINT_SRC_AND_LOC;
1963 case bp_catch_catch:
1964 if (current_exception_event &&
1965 (CURRENT_EXCEPTION_KIND == EX_EVENT_CATCH))
1967 annotate_catchpoint (bs->breakpoint_at->number);
1968 printf_filtered ("\nCatchpoint %d (exception caught), ",
1969 bs->breakpoint_at->number);
1970 printf_filtered ("throw location ");
1971 if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE)
1972 printf_filtered ("%s:%d",
1973 CURRENT_EXCEPTION_THROW_FILE,
1974 CURRENT_EXCEPTION_THROW_LINE);
1976 printf_filtered ("unknown");
1978 printf_filtered (", catch location ");
1979 if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE)
1980 printf_filtered ("%s:%d",
1981 CURRENT_EXCEPTION_CATCH_FILE,
1982 CURRENT_EXCEPTION_CATCH_LINE);
1984 printf_filtered ("unknown");
1986 printf_filtered ("\n");
1987 /* don't bother to print location frame info */
1988 return PRINT_SRC_ONLY;
1992 /* really throw, some other bpstat will handle it */
1993 return PRINT_UNKNOWN;
1997 case bp_catch_throw:
1998 if (current_exception_event &&
1999 (CURRENT_EXCEPTION_KIND == EX_EVENT_THROW))
2001 annotate_catchpoint (bs->breakpoint_at->number);
2002 printf_filtered ("\nCatchpoint %d (exception thrown), ",
2003 bs->breakpoint_at->number);
2004 printf_filtered ("throw location ");
2005 if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE)
2006 printf_filtered ("%s:%d",
2007 CURRENT_EXCEPTION_THROW_FILE,
2008 CURRENT_EXCEPTION_THROW_LINE);
2010 printf_filtered ("unknown");
2012 printf_filtered (", catch location ");
2013 if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE)
2014 printf_filtered ("%s:%d",
2015 CURRENT_EXCEPTION_CATCH_FILE,
2016 CURRENT_EXCEPTION_CATCH_LINE);
2018 printf_filtered ("unknown");
2020 printf_filtered ("\n");
2021 /* don't bother to print location frame info */
2022 return PRINT_SRC_ONLY;
2026 /* really catch, some other bpstat will handle it */
2027 return PRINT_UNKNOWN;
2032 case bp_hardware_watchpoint:
2033 if (bs->old_val != NULL)
2035 annotate_watchpoint (bs->breakpoint_at->number);
2037 if (interpreter_p && strncmp (interpreter_p, "mi", 2) == 0)
2038 ui_out_field_string (uiout, "reason", "watchpoint-trigger");
2039 mention (bs->breakpoint_at);
2040 ui_out_tuple_begin (uiout, "value");
2041 ui_out_text (uiout, "\nOld value = ");
2042 value_print (bs->old_val, stb->stream, 0, Val_pretty_default);
2043 ui_out_field_stream (uiout, "old", stb);
2044 ui_out_text (uiout, "\nNew value = ");
2045 value_print (bs->breakpoint_at->val, stb->stream, 0, Val_pretty_default);
2046 ui_out_field_stream (uiout, "new", stb);
2047 ui_out_tuple_end (uiout);
2048 ui_out_text (uiout, "\n");
2050 mention (bs->breakpoint_at);
2051 printf_filtered ("\nOld value = ");
2052 value_print (bs->old_val, gdb_stdout, 0, Val_pretty_default);
2053 printf_filtered ("\nNew value = ");
2054 value_print (bs->breakpoint_at->val, gdb_stdout, 0,
2055 Val_pretty_default);
2056 printf_filtered ("\n");
2058 value_free (bs->old_val);
2061 /* More than one watchpoint may have been triggered. */
2062 return PRINT_UNKNOWN;
2065 case bp_read_watchpoint:
2067 if (interpreter_p && strncmp (interpreter_p, "mi", 2) == 0)
2068 ui_out_field_string (uiout, "reason", "read-watchpoint-trigger");
2069 mention (bs->breakpoint_at);
2070 ui_out_tuple_begin (uiout, "value");
2071 ui_out_text (uiout, "\nValue = ");
2072 value_print (bs->breakpoint_at->val, stb->stream, 0, Val_pretty_default);
2073 ui_out_field_stream (uiout, "value", stb);
2074 ui_out_tuple_end (uiout);
2075 ui_out_text (uiout, "\n");
2077 mention (bs->breakpoint_at);
2078 printf_filtered ("\nValue = ");
2079 value_print (bs->breakpoint_at->val, gdb_stdout, 0,
2080 Val_pretty_default);
2081 printf_filtered ("\n");
2083 return PRINT_UNKNOWN;
2086 case bp_access_watchpoint:
2088 if (bs->old_val != NULL)
2090 annotate_watchpoint (bs->breakpoint_at->number);
2091 if (interpreter_p && strncmp (interpreter_p, "mi", 2) == 0)
2092 ui_out_field_string (uiout, "reason", "access-watchpoint-trigger");
2093 mention (bs->breakpoint_at);
2094 ui_out_tuple_begin (uiout, "value");
2095 ui_out_text (uiout, "\nOld value = ");
2096 value_print (bs->old_val, stb->stream, 0, Val_pretty_default);
2097 ui_out_field_stream (uiout, "old", stb);
2098 value_free (bs->old_val);
2100 ui_out_text (uiout, "\nNew value = ");
2104 mention (bs->breakpoint_at);
2105 if (interpreter_p && strncmp (interpreter_p, "mi", 2) == 0)
2106 ui_out_field_string (uiout, "reason", "access-watchpoint-trigger");
2107 ui_out_tuple_begin (uiout, "value");
2108 ui_out_text (uiout, "\nValue = ");
2110 value_print (bs->breakpoint_at->val, stb->stream, 0,Val_pretty_default);
2111 ui_out_field_stream (uiout, "new", stb);
2112 ui_out_tuple_end (uiout);
2113 ui_out_text (uiout, "\n");
2115 if (bs->old_val != NULL)
2117 annotate_watchpoint (bs->breakpoint_at->number);
2118 mention (bs->breakpoint_at);
2119 printf_filtered ("\nOld value = ");
2120 value_print (bs->old_val, gdb_stdout, 0, Val_pretty_default);
2121 value_free (bs->old_val);
2123 printf_filtered ("\nNew value = ");
2127 mention (bs->breakpoint_at);
2128 printf_filtered ("\nValue = ");
2130 value_print (bs->breakpoint_at->val, gdb_stdout, 0,
2131 Val_pretty_default);
2132 printf_filtered ("\n");
2134 return PRINT_UNKNOWN;
2137 /* Fall through, we don't deal with these types of breakpoints
2142 if (interpreter_p && strncmp (interpreter_p, "mi", 2) == 0)
2143 ui_out_field_string (uiout, "reason", "function-finished");
2145 return PRINT_UNKNOWN;
2150 if (interpreter_p && strncmp (interpreter_p, "mi", 2) == 0)
2151 ui_out_field_string (uiout, "reason", "location-reached");
2153 return PRINT_UNKNOWN;
2158 case bp_longjmp_resume:
2159 case bp_step_resume:
2160 case bp_through_sigtramp:
2161 case bp_watchpoint_scope:
2164 return PRINT_UNKNOWN;
2168 /* Generic routine for printing messages indicating why we
2169 stopped. The behavior of this function depends on the value
2170 'print_it' in the bpstat structure. Under some circumstances we
2171 may decide not to print anything here and delegate the task to
2174 static enum print_stop_action
2175 print_bp_stop_message (bpstat bs)
2177 switch (bs->print_it)
2180 /* Nothing should be printed for this bpstat entry. */
2181 return PRINT_UNKNOWN;
2185 /* We still want to print the frame, but we already printed the
2186 relevant messages. */
2187 return PRINT_SRC_AND_LOC;
2190 case print_it_normal:
2191 /* Normal case, we handle everything in print_it_typical. */
2192 return print_it_typical (bs);
2195 internal_error (__FILE__, __LINE__,
2196 "print_bp_stop_message: unrecognized enum value");
2201 /* Print a message indicating what happened. This is called from
2202 normal_stop(). The input to this routine is the head of the bpstat
2203 list - a list of the eventpoints that caused this stop. This
2204 routine calls the generic print routine for printing a message
2205 about reasons for stopping. This will print (for example) the
2206 "Breakpoint n," part of the output. The return value of this
2209 PRINT_UNKNOWN: Means we printed nothing
2210 PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
2211 code to print the location. An example is
2212 "Breakpoint 1, " which should be followed by
2214 PRINT_SRC_ONLY: Means we printed something, but there is no need
2215 to also print the location part of the message.
2216 An example is the catch/throw messages, which
2217 don't require a location appended to the end.
2218 PRINT_NOTHING: We have done some printing and we don't need any
2219 further info to be printed.*/
2221 enum print_stop_action
2222 bpstat_print (bpstat bs)
2226 /* Maybe another breakpoint in the chain caused us to stop.
2227 (Currently all watchpoints go on the bpstat whether hit or not.
2228 That probably could (should) be changed, provided care is taken
2229 with respect to bpstat_explains_signal). */
2230 for (; bs; bs = bs->next)
2232 val = print_bp_stop_message (bs);
2233 if (val == PRINT_SRC_ONLY
2234 || val == PRINT_SRC_AND_LOC
2235 || val == PRINT_NOTHING)
2239 /* We reached the end of the chain, or we got a null BS to start
2240 with and nothing was printed. */
2241 return PRINT_UNKNOWN;
2244 /* Evaluate the expression EXP and return 1 if value is zero.
2245 This is used inside a catch_errors to evaluate the breakpoint condition.
2246 The argument is a "struct expression *" that has been cast to char * to
2247 make it pass through catch_errors. */
2250 breakpoint_cond_eval (PTR exp)
2252 value_ptr mark = value_mark ();
2253 int i = !value_true (evaluate_expression ((struct expression *) exp));
2254 value_free_to_mark (mark);
2258 /* Allocate a new bpstat and chain it to the current one. */
2261 bpstat_alloc (struct breakpoint *b, bpstat cbs /* Current "bs" value */ )
2265 bs = (bpstat) xmalloc (sizeof (*bs));
2267 bs->breakpoint_at = b;
2268 /* If the condition is false, etc., don't do the commands. */
2269 bs->commands = NULL;
2271 bs->print_it = print_it_normal;
2275 /* Possible return values for watchpoint_check (this can't be an enum
2276 because of check_errors). */
2277 /* The watchpoint has been deleted. */
2278 #define WP_DELETED 1
2279 /* The value has changed. */
2280 #define WP_VALUE_CHANGED 2
2281 /* The value has not changed. */
2282 #define WP_VALUE_NOT_CHANGED 3
2284 #define BP_TEMPFLAG 1
2285 #define BP_HARDWAREFLAG 2
2287 /* Check watchpoint condition. */
2290 watchpoint_check (PTR p)
2292 bpstat bs = (bpstat) p;
2293 struct breakpoint *b;
2294 struct frame_info *fr;
2295 int within_current_scope;
2297 b = bs->breakpoint_at;
2299 if (b->exp_valid_block == NULL)
2300 within_current_scope = 1;
2303 /* There is no current frame at this moment. If we're going to have
2304 any chance of handling watchpoints on local variables, we'll need
2305 the frame chain (so we can determine if we're in scope). */
2306 reinit_frame_cache ();
2307 fr = find_frame_addr_in_frame_chain (b->watchpoint_frame);
2308 within_current_scope = (fr != NULL);
2309 if (within_current_scope)
2310 /* If we end up stopping, the current frame will get selected
2311 in normal_stop. So this call to select_frame won't affect
2313 select_frame (fr, -1);
2316 if (within_current_scope)
2318 /* We use value_{,free_to_}mark because it could be a
2319 *long* time before we return to the command level and
2320 call free_all_values. We can't call free_all_values because
2321 we might be in the middle of evaluating a function call. */
2323 value_ptr mark = value_mark ();
2324 value_ptr new_val = evaluate_expression (bs->breakpoint_at->exp);
2325 if (!value_equal (b->val, new_val))
2327 release_value (new_val);
2328 value_free_to_mark (mark);
2329 bs->old_val = b->val;
2331 /* We will stop here */
2332 return WP_VALUE_CHANGED;
2336 /* Nothing changed, don't do anything. */
2337 value_free_to_mark (mark);
2338 /* We won't stop here */
2339 return WP_VALUE_NOT_CHANGED;
2344 /* This seems like the only logical thing to do because
2345 if we temporarily ignored the watchpoint, then when
2346 we reenter the block in which it is valid it contains
2347 garbage (in the case of a function, it may have two
2348 garbage values, one before and one after the prologue).
2349 So we can't even detect the first assignment to it and
2350 watch after that (since the garbage may or may not equal
2351 the first value assigned). */
2352 /* We print all the stop information in print_it_typical(), but
2353 in this case, by the time we call print_it_typical() this bp
2354 will be deleted already. So we have no choice but print the
2355 information here. */
2357 if (interpreter_p && strncmp (interpreter_p, "mi", 2) == 0)
2358 ui_out_field_string (uiout, "reason", "watchpoint-scope");
2359 ui_out_text (uiout, "\nWatchpoint ");
2360 ui_out_field_int (uiout, "wpnum", bs->breakpoint_at->number);
2361 ui_out_text (uiout, " deleted because the program has left the block in\n\
2362 which its expression is valid.\n");
2365 Watchpoint %d deleted because the program has left the block in\n\
2366 which its expression is valid.\n", bs->breakpoint_at->number);
2369 if (b->related_breakpoint)
2370 b->related_breakpoint->disposition = del_at_next_stop;
2371 b->disposition = del_at_next_stop;
2377 /* Get a bpstat associated with having just stopped at address *PC
2378 and frame address CORE_ADDRESS. Update *PC to point at the
2379 breakpoint (if we hit a breakpoint). NOT_A_BREAKPOINT is nonzero
2380 if this is known to not be a real breakpoint (it could still be a
2381 watchpoint, though). */
2383 /* Determine whether we stopped at a breakpoint, etc, or whether we
2384 don't understand this stop. Result is a chain of bpstat's such that:
2386 if we don't understand the stop, the result is a null pointer.
2388 if we understand why we stopped, the result is not null.
2390 Each element of the chain refers to a particular breakpoint or
2391 watchpoint at which we have stopped. (We may have stopped for
2392 several reasons concurrently.)
2394 Each element of the chain has valid next, breakpoint_at,
2395 commands, FIXME??? fields. */
2398 bpstat_stop_status (CORE_ADDR *pc, int not_a_breakpoint)
2400 register struct breakpoint *b, *temp;
2402 /* True if we've hit a breakpoint (as opposed to a watchpoint). */
2403 int real_breakpoint = 0;
2404 /* Root of the chain of bpstat's */
2405 struct bpstats root_bs[1];
2406 /* Pointer to the last thing in the chain currently. */
2407 bpstat bs = root_bs;
2408 static char message1[] =
2409 "Error evaluating expression for watchpoint %d\n";
2410 char message[sizeof (message1) + 30 /* slop */ ];
2412 /* Get the address where the breakpoint would have been.
2413 The "not_a_breakpoint" argument is meant to distinguish
2414 between a breakpoint trap event and a trace/singlestep
2415 trap event. For a trace/singlestep trap event, we would
2416 not want to subtract DECR_PC_AFTER_BREAK from the PC. */
2418 bp_addr = *pc - (not_a_breakpoint && !SOFTWARE_SINGLE_STEP_P () ?
2419 0 : DECR_PC_AFTER_BREAK);
2421 ALL_BREAKPOINTS_SAFE (b, temp)
2423 if (b->enable == disabled
2424 || b->enable == shlib_disabled
2425 || b->enable == call_disabled)
2428 if (b->type != bp_watchpoint
2429 && b->type != bp_hardware_watchpoint
2430 && b->type != bp_read_watchpoint
2431 && b->type != bp_access_watchpoint
2432 && b->type != bp_hardware_breakpoint
2433 && b->type != bp_catch_fork
2434 && b->type != bp_catch_vfork
2435 && b->type != bp_catch_exec
2436 && b->type != bp_catch_catch
2437 && b->type != bp_catch_throw) /* a non-watchpoint bp */
2438 if (b->address != bp_addr || /* address doesn't match or */
2439 (overlay_debugging && /* overlay doesn't match */
2440 section_is_overlay (b->section) &&
2441 !section_is_mapped (b->section)))
2444 if (b->type == bp_hardware_breakpoint
2445 && b->address != (*pc - DECR_PC_AFTER_HW_BREAK))
2448 /* Is this a catchpoint of a load or unload? If so, did we
2449 get a load or unload of the specified library? If not,
2451 if ((b->type == bp_catch_load)
2452 #if defined(SOLIB_HAVE_LOAD_EVENT)
2453 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid))
2454 || ((b->dll_pathname != NULL)
2455 && (strcmp (b->dll_pathname,
2456 SOLIB_LOADED_LIBRARY_PATHNAME (
2457 PIDGET (inferior_ptid)))
2463 if ((b->type == bp_catch_unload)
2464 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2465 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid))
2466 || ((b->dll_pathname != NULL)
2467 && (strcmp (b->dll_pathname,
2468 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2469 PIDGET (inferior_ptid)))
2475 if ((b->type == bp_catch_fork)
2476 && !target_has_forked (PIDGET (inferior_ptid),
2477 &b->forked_inferior_pid))
2480 if ((b->type == bp_catch_vfork)
2481 && !target_has_vforked (PIDGET (inferior_ptid),
2482 &b->forked_inferior_pid))
2485 if ((b->type == bp_catch_exec)
2486 && !target_has_execd (PIDGET (inferior_ptid), &b->exec_pathname))
2489 if (ep_is_exception_catchpoint (b) &&
2490 !(current_exception_event = target_get_current_exception_event ()))
2493 /* Come here if it's a watchpoint, or if the break address matches */
2495 bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */
2497 /* Watchpoints may change this, if not found to have triggered. */
2501 sprintf (message, message1, b->number);
2502 if (b->type == bp_watchpoint ||
2503 b->type == bp_hardware_watchpoint)
2505 switch (catch_errors (watchpoint_check, bs, message,
2509 /* We've already printed what needs to be printed. */
2510 /* Actually this is superfluous, because by the time we
2511 call print_it_typical() the wp will be already deleted,
2512 and the function will return immediately. */
2513 bs->print_it = print_it_done;
2516 case WP_VALUE_CHANGED:
2520 case WP_VALUE_NOT_CHANGED:
2522 bs->print_it = print_it_noop;
2529 /* Error from catch_errors. */
2530 printf_filtered ("Watchpoint %d deleted.\n", b->number);
2531 if (b->related_breakpoint)
2532 b->related_breakpoint->disposition = del_at_next_stop;
2533 b->disposition = del_at_next_stop;
2534 /* We've already printed what needs to be printed. */
2535 bs->print_it = print_it_done;
2541 else if (b->type == bp_read_watchpoint ||
2542 b->type == bp_access_watchpoint)
2548 addr = target_stopped_data_address ();
2551 for (v = b->val_chain; v; v = v->next)
2553 if (VALUE_LVAL (v) == lval_memory
2554 && ! VALUE_LAZY (v))
2556 struct type *vtype = check_typedef (VALUE_TYPE (v));
2558 if (v == b->val_chain
2559 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
2560 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
2564 vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
2565 /* Exact match not required. Within range is
2567 if (addr >= vaddr &&
2568 addr < vaddr + TYPE_LENGTH (VALUE_TYPE (v)))
2574 switch (catch_errors (watchpoint_check, bs, message,
2578 /* We've already printed what needs to be printed. */
2579 bs->print_it = print_it_done;
2582 case WP_VALUE_CHANGED:
2583 if (b->type == bp_read_watchpoint)
2585 /* Don't stop: read watchpoints shouldn't fire if
2586 the value has changed. This is for targets which
2587 cannot set read-only watchpoints. */
2588 bs->print_it = print_it_noop;
2594 case WP_VALUE_NOT_CHANGED:
2601 /* Error from catch_errors. */
2602 printf_filtered ("Watchpoint %d deleted.\n", b->number);
2603 if (b->related_breakpoint)
2604 b->related_breakpoint->disposition = del_at_next_stop;
2605 b->disposition = del_at_next_stop;
2606 /* We've already printed what needs to be printed. */
2607 bs->print_it = print_it_done;
2610 else /* found == 0 */
2612 /* This is a case where some watchpoint(s) triggered,
2613 but not at the address of this watchpoint (FOUND
2614 was left zero). So don't print anything for this
2616 bs->print_it = print_it_noop;
2623 /* By definition, an encountered breakpoint is a triggered
2627 real_breakpoint = 1;
2631 b->frame != (get_current_frame ())->frame)
2635 int value_is_zero = 0;
2639 /* Need to select the frame, with all that implies
2640 so that the conditions will have the right context. */
2641 select_frame (get_current_frame (), 0);
2643 = catch_errors (breakpoint_cond_eval, (b->cond),
2644 "Error in testing breakpoint condition:\n",
2646 /* FIXME-someday, should give breakpoint # */
2649 if (b->cond && value_is_zero)
2652 /* Don't consider this a hit. */
2655 else if (b->ignore_count > 0)
2658 annotate_ignore_count_change ();
2663 /* We will stop here */
2664 if (b->disposition == disable)
2665 b->enable = disabled;
2666 bs->commands = b->commands;
2670 (STREQ ("silent", bs->commands->line) ||
2671 (xdb_commands && STREQ ("Q", bs->commands->line))))
2673 bs->commands = bs->commands->next;
2678 /* Print nothing for this entry if we dont stop or if we dont print. */
2679 if (bs->stop == 0 || bs->print == 0)
2680 bs->print_it = print_it_noop;
2683 bs->next = NULL; /* Terminate the chain */
2684 bs = root_bs->next; /* Re-grab the head of the chain */
2686 if (real_breakpoint && bs)
2688 if (bs->breakpoint_at->type == bp_hardware_breakpoint)
2690 if (DECR_PC_AFTER_HW_BREAK != 0)
2692 *pc = *pc - DECR_PC_AFTER_HW_BREAK;
2698 if (DECR_PC_AFTER_BREAK != 0 || must_shift_inst_regs)
2701 #if defined (SHIFT_INST_REGS)
2703 #else /* No SHIFT_INST_REGS. */
2705 #endif /* No SHIFT_INST_REGS. */
2710 /* The value of a hardware watchpoint hasn't changed, but the
2711 intermediate memory locations we are watching may have. */
2712 if (bs && !bs->stop &&
2713 (bs->breakpoint_at->type == bp_hardware_watchpoint ||
2714 bs->breakpoint_at->type == bp_read_watchpoint ||
2715 bs->breakpoint_at->type == bp_access_watchpoint))
2717 remove_breakpoints ();
2718 insert_breakpoints ();
2723 /* Tell what to do about this bpstat. */
2725 bpstat_what (bpstat bs)
2727 /* Classify each bpstat as one of the following. */
2730 /* This bpstat element has no effect on the main_action. */
2733 /* There was a watchpoint, stop but don't print. */
2736 /* There was a watchpoint, stop and print. */
2739 /* There was a breakpoint but we're not stopping. */
2742 /* There was a breakpoint, stop but don't print. */
2745 /* There was a breakpoint, stop and print. */
2748 /* We hit the longjmp breakpoint. */
2751 /* We hit the longjmp_resume breakpoint. */
2754 /* We hit the step_resume breakpoint. */
2757 /* We hit the through_sigtramp breakpoint. */
2760 /* We hit the shared library event breakpoint. */
2763 /* We caught a shared library event. */
2766 /* This is just used to count how many enums there are. */
2770 /* Here is the table which drives this routine. So that we can
2771 format it pretty, we define some abbreviations for the
2772 enum bpstat_what codes. */
2773 #define kc BPSTAT_WHAT_KEEP_CHECKING
2774 #define ss BPSTAT_WHAT_STOP_SILENT
2775 #define sn BPSTAT_WHAT_STOP_NOISY
2776 #define sgl BPSTAT_WHAT_SINGLE
2777 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2778 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2779 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2780 #define sr BPSTAT_WHAT_STEP_RESUME
2781 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2782 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2783 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2785 /* "Can't happen." Might want to print an error message.
2786 abort() is not out of the question, but chances are GDB is just
2787 a bit confused, not unusable. */
2788 #define err BPSTAT_WHAT_STOP_NOISY
2790 /* Given an old action and a class, come up with a new action. */
2791 /* One interesting property of this table is that wp_silent is the same
2792 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2793 after stopping, the check for whether to step over a breakpoint
2794 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2795 reference to how we stopped. We retain separate wp_silent and
2796 bp_silent codes in case we want to change that someday.
2798 Another possibly interesting property of this table is that
2799 there's a partial ordering, priority-like, of the actions. Once
2800 you've decided that some action is appropriate, you'll never go
2801 back and decide something of a lower priority is better. The
2804 kc < clr sgl shl shlr slr sn sr ss ts
2805 sgl < clrs shl shlr slr sn sr ss ts
2806 slr < err shl shlr sn sr ss ts
2807 clr < clrs err shl shlr sn sr ss ts
2808 clrs < err shl shlr sn sr ss ts
2809 ss < shl shlr sn sr ts
2816 What I think this means is that we don't need a damned table
2817 here. If you just put the rows and columns in the right order,
2818 it'd look awfully regular. We could simply walk the bpstat list
2819 and choose the highest priority action we find, with a little
2820 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
2821 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
2822 is messy anyway). */
2824 /* step_resume entries: a step resume breakpoint overrides another
2825 breakpoint of signal handling (see comment in wait_for_inferior
2826 at first IN_SIGTRAMP where we set the step_resume breakpoint). */
2827 /* We handle the through_sigtramp_breakpoint the same way; having both
2828 one of those and a step_resume_breakpoint is probably very rare (?). */
2830 static const enum bpstat_what_main_action
2831 table[(int) class_last][(int) BPSTAT_WHAT_LAST] =
2834 /* kc ss sn sgl slr clr clrs sr ts shl shlr
2837 {kc, ss, sn, sgl, slr, clr, clrs, sr, ts, shl, shlr},
2839 {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
2841 {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
2843 {sgl, ss, sn, sgl, slr, clrs, clrs, sr, ts, shl, shlr},
2845 {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
2847 {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
2849 {slr, ss, sn, slr, slr, err, err, sr, ts, shl, shlr},
2851 {clr, ss, sn, clrs, err, err, err, sr, ts, shl, shlr},
2853 {sr, sr, sr, sr, sr, sr, sr, sr, ts, shl, shlr},
2855 {ts, ts, ts, ts, ts, ts, ts, ts, ts, shl, shlr},
2857 {shl, shl, shl, shl, shl, shl, shl, shl, ts, shl, shlr},
2859 {shlr, shlr, shlr, shlr, shlr, shlr, shlr, shlr, ts, shlr, shlr}
2874 enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING;
2875 struct bpstat_what retval;
2877 retval.call_dummy = 0;
2878 for (; bs != NULL; bs = bs->next)
2880 enum class bs_class = no_effect;
2881 if (bs->breakpoint_at == NULL)
2882 /* I suspect this can happen if it was a momentary breakpoint
2883 which has since been deleted. */
2885 switch (bs->breakpoint_at->type)
2891 case bp_hardware_breakpoint:
2897 bs_class = bp_noisy;
2899 bs_class = bp_silent;
2902 bs_class = bp_nostop;
2905 case bp_hardware_watchpoint:
2906 case bp_read_watchpoint:
2907 case bp_access_watchpoint:
2911 bs_class = wp_noisy;
2913 bs_class = wp_silent;
2916 /* There was a watchpoint, but we're not stopping.
2917 This requires no further action. */
2918 bs_class = no_effect;
2921 bs_class = long_jump;
2923 case bp_longjmp_resume:
2924 bs_class = long_resume;
2926 case bp_step_resume:
2929 bs_class = step_resume;
2932 /* It is for the wrong frame. */
2933 bs_class = bp_nostop;
2935 case bp_through_sigtramp:
2936 bs_class = through_sig;
2938 case bp_watchpoint_scope:
2939 bs_class = bp_nostop;
2941 case bp_shlib_event:
2942 bs_class = shlib_event;
2944 case bp_thread_event:
2945 bs_class = bp_nostop;
2948 case bp_catch_unload:
2949 /* Only if this catchpoint triggered should we cause the
2950 step-out-of-dld behaviour. Otherwise, we ignore this
2953 bs_class = catch_shlib_event;
2955 bs_class = no_effect;
2958 case bp_catch_vfork:
2963 bs_class = bp_noisy;
2965 bs_class = bp_silent;
2968 /* There was a catchpoint, but we're not stopping.
2969 This requires no further action. */
2970 bs_class = no_effect;
2972 case bp_catch_catch:
2973 if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_CATCH)
2974 bs_class = bp_nostop;
2976 bs_class = bs->print ? bp_noisy : bp_silent;
2978 case bp_catch_throw:
2979 if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_THROW)
2980 bs_class = bp_nostop;
2982 bs_class = bs->print ? bp_noisy : bp_silent;
2985 /* Make sure the action is stop (silent or noisy),
2986 so infrun.c pops the dummy frame. */
2987 bs_class = bp_silent;
2988 retval.call_dummy = 1;
2991 current_action = table[(int) bs_class][(int) current_action];
2993 retval.main_action = current_action;
2997 /* Nonzero if we should step constantly (e.g. watchpoints on machines
2998 without hardware support). This isn't related to a specific bpstat,
2999 just to things like whether watchpoints are set. */
3002 bpstat_should_step (void)
3004 struct breakpoint *b;
3006 if (b->enable == enabled && b->type == bp_watchpoint)
3011 /* Nonzero if there are enabled hardware watchpoints. */
3013 bpstat_have_active_hw_watchpoints (void)
3015 struct breakpoint *b;
3017 if ((b->enable == enabled) &&
3019 ((b->type == bp_hardware_watchpoint) ||
3020 (b->type == bp_read_watchpoint) ||
3021 (b->type == bp_access_watchpoint)))
3027 /* Given a bpstat that records zero or more triggered eventpoints, this
3028 function returns another bpstat which contains only the catchpoints
3029 on that first list, if any. */
3031 bpstat_get_triggered_catchpoints (bpstat ep_list, bpstat *cp_list)
3033 struct bpstats root_bs[1];
3034 bpstat bs = root_bs;
3035 struct breakpoint *ep;
3038 bpstat_clear (cp_list);
3039 root_bs->next = NULL;
3041 for (; ep_list != NULL; ep_list = ep_list->next)
3043 /* Is this eventpoint a catchpoint? If not, ignore it. */
3044 ep = ep_list->breakpoint_at;
3047 if ((ep->type != bp_catch_load) &&
3048 (ep->type != bp_catch_unload) &&
3049 (ep->type != bp_catch_catch) &&
3050 (ep->type != bp_catch_throw))
3051 /* pai: (temp) ADD fork/vfork here!! */
3054 /* Yes; add it to the list. */
3055 bs = bpstat_alloc (ep, bs);
3060 #if defined(SOLIB_ADD)
3061 /* Also, for each triggered catchpoint, tag it with the name of
3062 the library that caused this trigger. (We copy the name now,
3063 because it's only guaranteed to be available NOW, when the
3064 catchpoint triggers. Clients who may wish to know the name
3065 later must get it from the catchpoint itself.) */
3066 if (ep->triggered_dll_pathname != NULL)
3067 xfree (ep->triggered_dll_pathname);
3068 if (ep->type == bp_catch_load)
3069 dll_pathname = SOLIB_LOADED_LIBRARY_PATHNAME (
3070 PIDGET (inferior_ptid));
3072 dll_pathname = SOLIB_UNLOADED_LIBRARY_PATHNAME (
3073 PIDGET (inferior_ptid));
3075 dll_pathname = NULL;
3079 ep->triggered_dll_pathname = (char *)
3080 xmalloc (strlen (dll_pathname) + 1);
3081 strcpy (ep->triggered_dll_pathname, dll_pathname);
3084 ep->triggered_dll_pathname = NULL;
3090 /* Print B to gdb_stdout. */
3092 print_one_breakpoint (struct breakpoint *b,
3093 CORE_ADDR *last_addr)
3095 register struct command_line *l;
3096 register struct symbol *sym;
3097 struct ep_type_description
3102 static struct ep_type_description bptypes[] =
3104 {bp_none, "?deleted?"},
3105 {bp_breakpoint, "breakpoint"},
3106 {bp_hardware_breakpoint, "hw breakpoint"},
3107 {bp_until, "until"},
3108 {bp_finish, "finish"},
3109 {bp_watchpoint, "watchpoint"},
3110 {bp_hardware_watchpoint, "hw watchpoint"},
3111 {bp_read_watchpoint, "read watchpoint"},
3112 {bp_access_watchpoint, "acc watchpoint"},
3113 {bp_longjmp, "longjmp"},
3114 {bp_longjmp_resume, "longjmp resume"},
3115 {bp_step_resume, "step resume"},
3116 {bp_through_sigtramp, "sigtramp"},
3117 {bp_watchpoint_scope, "watchpoint scope"},
3118 {bp_call_dummy, "call dummy"},
3119 {bp_shlib_event, "shlib events"},
3120 {bp_thread_event, "thread events"},
3121 {bp_catch_load, "catch load"},
3122 {bp_catch_unload, "catch unload"},
3123 {bp_catch_fork, "catch fork"},
3124 {bp_catch_vfork, "catch vfork"},
3125 {bp_catch_exec, "catch exec"},
3126 {bp_catch_catch, "catch catch"},
3127 {bp_catch_throw, "catch throw"}
3130 static char *bpdisps[] =
3131 {"del", "dstp", "dis", "keep"};
3132 static char bpenables[] = "nynny";
3133 char wrap_indent[80];
3135 struct ui_stream *stb = ui_out_stream_new (uiout);
3136 struct cleanup *old_chain = make_cleanup_ui_out_stream_delete (stb);
3141 ui_out_tuple_begin (uiout, "bkpt");
3147 ui_out_field_int (uiout, "number", b->number);
3149 printf_filtered ("%-3d ", b->number);
3154 if (((int) b->type > (sizeof (bptypes) / sizeof (bptypes[0])))
3155 || ((int) b->type != bptypes[(int) b->type].type))
3156 internal_error (__FILE__, __LINE__,
3157 "bptypes table does not describe type #%d.",
3160 ui_out_field_string (uiout, "type", bptypes[(int) b->type].description);
3162 printf_filtered ("%-14s ", bptypes[(int) b->type].description);
3168 ui_out_field_string (uiout, "disp", bpdisps[(int) b->disposition]);
3170 printf_filtered ("%-4s ", bpdisps[(int) b->disposition]);
3176 ui_out_field_fmt (uiout, "enabled", "%c", bpenables[(int) b->enable]);
3177 ui_out_spaces (uiout, 2);
3179 printf_filtered ("%-3c ", bpenables[(int) b->enable]);
3183 strcpy (wrap_indent, " ");
3186 if (TARGET_ADDR_BIT <= 32)
3187 strcat (wrap_indent, " ");
3189 strcat (wrap_indent, " ");
3194 internal_error (__FILE__, __LINE__,
3195 "print_one_breakpoint: bp_none encountered\n");
3199 case bp_hardware_watchpoint:
3200 case bp_read_watchpoint:
3201 case bp_access_watchpoint:
3202 /* Field 4, the address, is omitted (which makes the columns
3203 not line up too nicely with the headers, but the effect
3204 is relatively readable). */
3207 ui_out_field_skip (uiout, "addr");
3209 print_expression (b->exp, stb->stream);
3210 ui_out_field_stream (uiout, "what", stb);
3213 print_expression (b->exp, gdb_stdout);
3218 case bp_catch_unload:
3219 /* Field 4, the address, is omitted (which makes the columns
3220 not line up too nicely with the headers, but the effect
3221 is relatively readable). */
3224 ui_out_field_skip (uiout, "addr");
3226 if (b->dll_pathname == NULL)
3228 ui_out_field_string (uiout, "what", "<any library>");
3229 ui_out_spaces (uiout, 1);
3233 ui_out_text (uiout, "library \"");
3234 ui_out_field_string (uiout, "what", b->dll_pathname);
3235 ui_out_text (uiout, "\" ");
3239 if (b->dll_pathname == NULL)
3240 printf_filtered ("<any library> ");
3242 printf_filtered ("library \"%s\" ", b->dll_pathname);
3247 case bp_catch_vfork:
3248 /* Field 4, the address, is omitted (which makes the columns
3249 not line up too nicely with the headers, but the effect
3250 is relatively readable). */
3253 ui_out_field_skip (uiout, "addr");
3255 if (b->forked_inferior_pid != 0)
3257 ui_out_text (uiout, "process ");
3258 ui_out_field_int (uiout, "what", b->forked_inferior_pid);
3259 ui_out_spaces (uiout, 1);
3263 if (b->forked_inferior_pid != 0)
3264 printf_filtered ("process %d ", b->forked_inferior_pid);
3269 /* Field 4, the address, is omitted (which makes the columns
3270 not line up too nicely with the headers, but the effect
3271 is relatively readable). */
3274 ui_out_field_skip (uiout, "addr");
3276 if (b->exec_pathname != NULL)
3278 ui_out_text (uiout, "program \"");
3279 ui_out_field_string (uiout, "what", b->exec_pathname);
3280 ui_out_text (uiout, "\" ");
3284 if (b->exec_pathname != NULL)
3285 printf_filtered ("program \"%s\" ", b->exec_pathname);
3289 case bp_catch_catch:
3290 /* Field 4, the address, is omitted (which makes the columns
3291 not line up too nicely with the headers, but the effect
3292 is relatively readable). */
3295 ui_out_field_skip (uiout, "addr");
3297 ui_out_field_string (uiout, "what", "exception catch");
3298 ui_out_spaces (uiout, 1);
3301 printf_filtered ("exception catch ");
3305 case bp_catch_throw:
3306 /* Field 4, the address, is omitted (which makes the columns
3307 not line up too nicely with the headers, but the effect
3308 is relatively readable). */
3311 ui_out_field_skip (uiout, "addr");
3313 ui_out_field_string (uiout, "what", "exception throw");
3314 ui_out_spaces (uiout, 1);
3317 printf_filtered ("exception throw ");
3322 case bp_hardware_breakpoint:
3326 case bp_longjmp_resume:
3327 case bp_step_resume:
3328 case bp_through_sigtramp:
3329 case bp_watchpoint_scope:
3331 case bp_shlib_event:
3332 case bp_thread_event:
3337 ui_out_field_core_addr (uiout, "addr", b->address);
3340 *last_addr = b->address;
3343 sym = find_pc_sect_function (b->address, b->section);
3346 ui_out_text (uiout, "in ");
3347 ui_out_field_string (uiout, "func",
3348 SYMBOL_SOURCE_NAME (sym));
3349 ui_out_wrap_hint (uiout, wrap_indent);
3350 ui_out_text (uiout, " at ");
3352 ui_out_field_string (uiout, "file", b->source_file);
3353 ui_out_text (uiout, ":");
3354 ui_out_field_int (uiout, "line", b->line_number);
3358 print_address_symbolic (b->address, stb->stream, demangle, "");
3359 ui_out_field_stream (uiout, "at", stb);
3368 if (TARGET_ADDR_BIT <= 32)
3369 tmp = longest_local_hex_string_custom (b->address
3370 & (CORE_ADDR) 0xffffffff,
3373 tmp = longest_local_hex_string_custom (b->address, "016l");
3375 printf_filtered ("%s ", tmp);
3378 *last_addr = b->address;
3381 sym = find_pc_sect_function (b->address, b->section);
3384 fputs_filtered ("in ", gdb_stdout);
3385 fputs_filtered (SYMBOL_SOURCE_NAME (sym), gdb_stdout);
3386 wrap_here (wrap_indent);
3387 fputs_filtered (" at ", gdb_stdout);
3389 fputs_filtered (b->source_file, gdb_stdout);
3390 printf_filtered (":%d", b->line_number);
3393 print_address_symbolic (b->address, gdb_stdout, demangle, " ");
3398 if (b->thread != -1)
3401 /* FIXME: This seems to be redundant and lost here; see the
3402 "stop only in" line a little further down. */
3403 ui_out_text (uiout, " thread ");
3404 ui_out_field_int (uiout, "thread", b->thread);
3406 printf_filtered (" thread %d", b->thread);
3411 ui_out_text (uiout, "\n");
3413 printf_filtered ("\n");
3420 ui_out_text (uiout, "\tstop only in stack frame at ");
3421 ui_out_field_core_addr (uiout, "frame", b->frame);
3422 ui_out_text (uiout, "\n");
3424 printf_filtered ("\tstop only in stack frame at ");
3425 print_address_numeric (b->frame, 1, gdb_stdout);
3426 printf_filtered ("\n");
3434 ui_out_text (uiout, "\tstop only if ");
3435 print_expression (b->cond, stb->stream);
3436 ui_out_field_stream (uiout, "cond", stb);
3437 ui_out_text (uiout, "\n");
3439 printf_filtered ("\tstop only if ");
3440 print_expression (b->cond, gdb_stdout);
3441 printf_filtered ("\n");
3445 if (b->thread != -1)
3447 /* FIXME should make an annotation for this */
3449 ui_out_text (uiout, "\tstop only in thread ");
3450 ui_out_field_int (uiout, "thread", b->thread);
3451 ui_out_text (uiout, "\n");
3453 printf_filtered ("\tstop only in thread %d\n", b->thread);
3457 if (show_breakpoint_hit_counts && b->hit_count)
3459 /* FIXME should make an annotation for this */
3461 if (ep_is_catchpoint (b))
3462 ui_out_text (uiout, "\tcatchpoint");
3464 ui_out_text (uiout, "\tbreakpoint");
3465 ui_out_text (uiout, " already hit ");
3466 ui_out_field_int (uiout, "times", b->hit_count);
3467 if (b->hit_count == 1)
3468 ui_out_text (uiout, " time\n");
3470 ui_out_text (uiout, " times\n");
3472 if (ep_is_catchpoint (b))
3473 printf_filtered ("\tcatchpoint");
3475 printf_filtered ("\tbreakpoint");
3476 printf_filtered (" already hit %d time%s\n",
3477 b->hit_count, (b->hit_count == 1 ? "" : "s"));
3482 /* Output the count also if it is zero, but only if this is
3483 mi. FIXME: Should have a better test for this. */
3484 if (interpreter_p && strncmp (interpreter_p, "mi", 2) == 0)
3485 if (show_breakpoint_hit_counts && b->hit_count == 0)
3486 ui_out_field_int (uiout, "times", b->hit_count);
3489 if (b->ignore_count)
3493 ui_out_text (uiout, "\tignore next ");
3494 ui_out_field_int (uiout, "ignore", b->ignore_count);
3495 ui_out_text (uiout, " hits\n");
3497 printf_filtered ("\tignore next %d hits\n", b->ignore_count);
3501 if ((l = b->commands))
3505 ui_out_tuple_begin (uiout, "script");
3506 print_command_lines (uiout, l, 4);
3507 ui_out_tuple_end (uiout);
3511 print_command_line (l, 4, gdb_stdout);
3517 ui_out_tuple_end (uiout);
3518 do_cleanups (old_chain);
3522 struct captured_breakpoint_query_args
3528 do_captured_breakpoint_query (void *data)
3530 struct captured_breakpoint_query_args *args = data;
3531 register struct breakpoint *b;
3532 CORE_ADDR dummy_addr = 0;
3535 if (args->bnum == b->number)
3537 print_one_breakpoint (b, &dummy_addr);
3545 gdb_breakpoint_query (/* output object, */ int bnum)
3547 struct captured_breakpoint_query_args args;
3549 /* For the moment we don't trust print_one_breakpoint() to not throw
3551 return catch_errors (do_captured_breakpoint_query, &args,
3552 NULL, RETURN_MASK_ALL);
3555 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3556 catchpoints, et.al.). */
3559 user_settable_breakpoint (const struct breakpoint *b)
3561 return (b->type == bp_breakpoint
3562 || b->type == bp_catch_load
3563 || b->type == bp_catch_unload
3564 || b->type == bp_catch_fork
3565 || b->type == bp_catch_vfork
3566 || b->type == bp_catch_exec
3567 || b->type == bp_catch_catch
3568 || b->type == bp_catch_throw
3569 || b->type == bp_hardware_breakpoint
3570 || b->type == bp_watchpoint
3571 || b->type == bp_read_watchpoint
3572 || b->type == bp_access_watchpoint
3573 || b->type == bp_hardware_watchpoint);
3576 /* Print information on user settable breakpoint (watchpoint, etc)
3577 number BNUM. If BNUM is -1 print all user settable breakpoints.
3578 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3581 breakpoint_1 (int bnum, int allflag)
3583 register struct breakpoint *b;
3584 CORE_ADDR last_addr = (CORE_ADDR) -1;
3585 int nr_printable_breakpoints;
3587 /* Compute the number of rows in the table. */
3588 nr_printable_breakpoints = 0;
3591 || bnum == b->number)
3593 if (allflag || user_settable_breakpoint (b))
3594 nr_printable_breakpoints++;
3599 ui_out_table_begin (uiout, 6, nr_printable_breakpoints, "BreakpointTable");
3601 ui_out_table_begin (uiout, 5, nr_printable_breakpoints, "BreakpointTable");
3605 if (nr_printable_breakpoints > 0)
3606 annotate_breakpoints_headers ();
3607 if (nr_printable_breakpoints > 0)
3609 ui_out_table_header (uiout, 3, ui_left, "number", "Num"); /* 1 */
3610 if (nr_printable_breakpoints > 0)
3612 ui_out_table_header (uiout, 14, ui_left, "type", "Type"); /* 2 */
3613 if (nr_printable_breakpoints > 0)
3615 ui_out_table_header (uiout, 4, ui_left, "disp", "Disp"); /* 3 */
3616 if (nr_printable_breakpoints > 0)
3618 ui_out_table_header (uiout, 3, ui_left, "enabled", "Enb"); /* 4 */
3621 if (nr_printable_breakpoints > 0)
3623 if (TARGET_ADDR_BIT <= 32)
3624 ui_out_table_header (uiout, 10, ui_left, "addr", "Address");/* 5 */
3626 ui_out_table_header (uiout, 18, ui_left, "addr", "Address");/* 5 */
3628 if (nr_printable_breakpoints > 0)
3630 ui_out_table_header (uiout, 40, ui_noalign, "what", "What"); /* 6 */
3631 ui_out_table_body (uiout);
3632 if (nr_printable_breakpoints > 0)
3633 annotate_breakpoints_table ();
3635 if (nr_printable_breakpoints > 0)
3637 annotate_breakpoints_headers ();
3639 printf_filtered ("Num ");
3641 printf_filtered ("Type ");
3643 printf_filtered ("Disp ");
3645 printf_filtered ("Enb ");
3649 if (TARGET_ADDR_BIT <= 32)
3650 printf_filtered ("Address ");
3652 printf_filtered ("Address ");
3655 printf_filtered ("What\n");
3656 annotate_breakpoints_table ();
3662 || bnum == b->number)
3664 /* We only print out user settable breakpoints unless the
3666 if (allflag || user_settable_breakpoint (b))
3667 print_one_breakpoint (b, &last_addr);
3672 ui_out_table_end (uiout);
3675 if (nr_printable_breakpoints == 0)
3679 ui_out_message (uiout, 0, "No breakpoints or watchpoints.\n");
3681 ui_out_message (uiout, 0, "No breakpoint or watchpoint number %d.\n",
3685 printf_filtered ("No breakpoints or watchpoints.\n");
3687 printf_filtered ("No breakpoint or watchpoint number %d.\n", bnum);
3692 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3693 that a comparison of an unsigned with -1 is always false. */
3694 if (last_addr != (CORE_ADDR) -1)
3695 set_next_address (last_addr);
3698 /* FIXME? Should this be moved up so that it is only called when
3699 there have been breakpoints? */
3700 annotate_breakpoints_table_end ();
3705 breakpoints_info (char *bnum_exp, int from_tty)
3710 bnum = parse_and_eval_long (bnum_exp);
3712 breakpoint_1 (bnum, 0);
3717 maintenance_info_breakpoints (char *bnum_exp, int from_tty)
3722 bnum = parse_and_eval_long (bnum_exp);
3724 breakpoint_1 (bnum, 1);
3727 /* Print a message describing any breakpoints set at PC. */
3730 describe_other_breakpoints (CORE_ADDR pc, asection *section)
3732 register int others = 0;
3733 register struct breakpoint *b;
3736 if (b->address == pc)
3737 if (overlay_debugging == 0 ||
3738 b->section == section)
3742 printf_filtered ("Note: breakpoint%s ", (others > 1) ? "s" : "");
3744 if (b->address == pc)
3745 if (overlay_debugging == 0 ||
3746 b->section == section)
3749 printf_filtered ("%d%s%s ",
3751 ((b->enable == disabled ||
3752 b->enable == shlib_disabled ||
3753 b->enable == call_disabled) ? " (disabled)"
3754 : b->enable == permanent ? " (permanent)"
3757 : ((others == 1) ? " and" : ""));
3759 printf_filtered ("also set at pc ");
3760 print_address_numeric (pc, 1, gdb_stdout);
3761 printf_filtered (".\n");
3765 /* Set the default place to put a breakpoint
3766 for the `break' command with no arguments. */
3769 set_default_breakpoint (int valid, CORE_ADDR addr, struct symtab *symtab,
3772 default_breakpoint_valid = valid;
3773 default_breakpoint_address = addr;
3774 default_breakpoint_symtab = symtab;
3775 default_breakpoint_line = line;
3778 /* Return true iff it is meaningful to use the address member of
3779 BPT. For some breakpoint types, the address member is irrelevant
3780 and it makes no sense to attempt to compare it to other addresses
3781 (or use it for any other purpose either).
3783 More specifically, each of the following breakpoint types will always
3784 have a zero valued address and we don't want check_duplicates() to mark
3785 breakpoints of any of these types to be a duplicate of an actual
3786 breakpoint at address zero:
3789 bp_hardware_watchpoint
3791 bp_access_watchpoint
3798 breakpoint_address_is_meaningful (struct breakpoint *bpt)
3800 enum bptype type = bpt->type;
3802 return (type != bp_watchpoint
3803 && type != bp_hardware_watchpoint
3804 && type != bp_read_watchpoint
3805 && type != bp_access_watchpoint
3806 && type != bp_catch_exec
3807 && type != bp_longjmp_resume
3808 && type != bp_catch_fork
3809 && type != bp_catch_vfork);
3812 /* Rescan breakpoints at the same address and section as BPT,
3813 marking the first one as "first" and any others as "duplicates".
3814 This is so that the bpt instruction is only inserted once.
3815 If we have a permanent breakpoint at the same place as BPT, make
3816 that one the official one, and the rest as duplicates. */
3819 check_duplicates (struct breakpoint *bpt)
3821 register struct breakpoint *b;
3822 register int count = 0;
3823 struct breakpoint *perm_bp = 0;
3824 CORE_ADDR address = bpt->address;
3825 asection *section = bpt->section;
3827 if (! breakpoint_address_is_meaningful (bpt))
3831 if (b->enable != disabled
3832 && b->enable != shlib_disabled
3833 && b->enable != call_disabled
3834 && b->address == address
3835 && (overlay_debugging == 0 || b->section == section)
3836 && breakpoint_address_is_meaningful (b))
3838 /* Have we found a permanent breakpoint? */
3839 if (b->enable == permanent)
3846 b->duplicate = count > 1;
3849 /* If we found a permanent breakpoint at this address, go over the
3850 list again and declare all the other breakpoints there to be the
3854 perm_bp->duplicate = 0;
3856 /* Permanent breakpoint should always be inserted. */
3857 if (! perm_bp->inserted)
3858 internal_error (__FILE__, __LINE__,
3859 "allegedly permanent breakpoint is not "
3860 "actually inserted");
3866 internal_error (__FILE__, __LINE__,
3867 "another breakpoint was inserted on top of "
3868 "a permanent breakpoint");
3870 if (b->enable != disabled
3871 && b->enable != shlib_disabled
3872 && b->enable != call_disabled
3873 && b->address == address
3874 && (overlay_debugging == 0 || b->section == section)
3875 && breakpoint_address_is_meaningful (b))
3881 /* set_raw_breakpoint() is a low level routine for allocating and
3882 partially initializing a breakpoint of type BPTYPE. The newly
3883 created breakpoint's address, section, source file name, and line
3884 number are provided by SAL. The newly created and partially
3885 initialized breakpoint is added to the breakpoint chain and
3886 is also returned as the value of this function.
3888 It is expected that the caller will complete the initialization of
3889 the newly created breakpoint struct as well as output any status
3890 information regarding the creation of a new breakpoint. In
3891 particular, set_raw_breakpoint() does NOT set the breakpoint
3892 number! Care should be taken to not allow an error() to occur
3893 prior to completing the initialization of the breakpoint. If this
3894 should happen, a bogus breakpoint will be left on the chain. */
3897 set_raw_breakpoint (struct symtab_and_line sal, enum bptype bptype)
3899 register struct breakpoint *b, *b1;
3901 b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint));
3902 memset (b, 0, sizeof (*b));
3903 b->address = sal.pc;
3904 if (sal.symtab == NULL)
3905 b->source_file = NULL;
3907 b->source_file = savestring (sal.symtab->filename,
3908 strlen (sal.symtab->filename));
3909 b->section = sal.section;
3911 b->language = current_language->la_language;
3912 b->input_radix = input_radix;
3914 b->line_number = sal.line;
3915 b->enable = enabled;
3918 b->ignore_count = 0;
3921 b->dll_pathname = NULL;
3922 b->triggered_dll_pathname = NULL;
3923 b->forked_inferior_pid = 0;
3924 b->exec_pathname = NULL;
3926 /* Add this breakpoint to the end of the chain
3927 so that a list of breakpoints will come out in order
3928 of increasing numbers. */
3930 b1 = breakpoint_chain;
3932 breakpoint_chain = b;
3940 check_duplicates (b);
3941 breakpoints_changed ();
3947 /* Note that the breakpoint object B describes a permanent breakpoint
3948 instruction, hard-wired into the inferior's code. */
3950 make_breakpoint_permanent (struct breakpoint *b)
3952 b->enable = permanent;
3954 /* By definition, permanent breakpoints are already present in the code. */
3958 #ifdef GET_LONGJMP_TARGET
3961 create_longjmp_breakpoint (char *func_name)
3963 struct symtab_and_line sal;
3964 struct breakpoint *b;
3966 INIT_SAL (&sal); /* initialize to zeroes */
3967 if (func_name != NULL)
3969 struct minimal_symbol *m;
3971 m = lookup_minimal_symbol_text (func_name, NULL,
3972 (struct objfile *) NULL);
3974 sal.pc = SYMBOL_VALUE_ADDRESS (m);
3978 sal.section = find_pc_overlay (sal.pc);
3979 b = set_raw_breakpoint (sal,
3980 func_name != NULL ? bp_longjmp : bp_longjmp_resume);
3982 b->disposition = donttouch;
3983 b->enable = disabled;
3986 b->addr_string = xstrdup (func_name);
3987 b->number = internal_breakpoint_number--;
3990 #endif /* #ifdef GET_LONGJMP_TARGET */
3992 /* Call this routine when stepping and nexting to enable a breakpoint
3993 if we do a longjmp(). When we hit that breakpoint, call
3994 set_longjmp_resume_breakpoint() to figure out where we are going. */
3997 enable_longjmp_breakpoint (void)
3999 register struct breakpoint *b;
4002 if (b->type == bp_longjmp)
4004 b->enable = enabled;
4005 check_duplicates (b);
4010 disable_longjmp_breakpoint (void)
4012 register struct breakpoint *b;
4015 if (b->type == bp_longjmp
4016 || b->type == bp_longjmp_resume)
4018 b->enable = disabled;
4019 check_duplicates (b);
4024 create_thread_event_breakpoint (CORE_ADDR address)
4026 struct breakpoint *b;
4027 struct symtab_and_line sal;
4028 char addr_string[80]; /* Surely an addr can't be longer than that. */
4030 INIT_SAL (&sal); /* initialize to zeroes */
4032 sal.section = find_pc_overlay (sal.pc);
4033 b = set_raw_breakpoint (sal, bp_thread_event);
4035 b->number = internal_breakpoint_number--;
4036 b->disposition = donttouch;
4037 b->enable = enabled;
4038 /* addr_string has to be used or breakpoint_re_set will delete me. */
4039 sprintf (addr_string, "*0x%s", paddr (b->address));
4040 b->addr_string = xstrdup (addr_string);
4046 remove_thread_event_breakpoints (void)
4048 struct breakpoint *b, *temp;
4050 ALL_BREAKPOINTS_SAFE (b, temp)
4051 if (b->type == bp_thread_event)
4052 delete_breakpoint (b);
4057 remove_solib_event_breakpoints (void)
4059 register struct breakpoint *b, *temp;
4061 ALL_BREAKPOINTS_SAFE (b, temp)
4062 if (b->type == bp_shlib_event)
4063 delete_breakpoint (b);
4067 create_solib_event_breakpoint (CORE_ADDR address)
4069 struct breakpoint *b;
4070 struct symtab_and_line sal;
4072 INIT_SAL (&sal); /* initialize to zeroes */
4074 sal.section = find_pc_overlay (sal.pc);
4075 b = set_raw_breakpoint (sal, bp_shlib_event);
4076 b->number = internal_breakpoint_number--;
4077 b->disposition = donttouch;
4082 /* Disable any breakpoints that are on code in shared libraries. Only
4083 apply to enabled breakpoints, disabled ones can just stay disabled. */
4086 disable_breakpoints_in_shlibs (int silent)
4088 struct breakpoint *b;
4089 int disabled_shlib_breaks = 0;
4091 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4094 #if defined (PC_SOLIB)
4095 if (((b->type == bp_breakpoint) ||
4096 (b->type == bp_hardware_breakpoint)) &&
4097 b->enable == enabled &&
4099 PC_SOLIB (b->address))
4101 b->enable = shlib_disabled;
4104 if (!disabled_shlib_breaks)
4106 target_terminal_ours_for_output ();
4107 warning ("Temporarily disabling shared library breakpoints:");
4109 disabled_shlib_breaks = 1;
4110 warning ("breakpoint #%d ", b->number);
4117 /* Try to reenable any breakpoints in shared libraries. */
4119 re_enable_breakpoints_in_shlibs (void)
4121 struct breakpoint *b;
4124 if (b->enable == shlib_disabled)
4128 /* Do not reenable the breakpoint if the shared library
4129 is still not mapped in. */
4130 if (target_read_memory (b->address, buf, 1) == 0)
4131 b->enable = enabled;
4138 solib_load_unload_1 (char *hookname, int tempflag, char *dll_pathname,
4139 char *cond_string, enum bptype bp_kind)
4141 struct breakpoint *b;
4142 struct symtabs_and_lines sals;
4143 struct cleanup *old_chain;
4144 struct cleanup *canonical_strings_chain = NULL;
4145 char *addr_start = hookname;
4146 char *addr_end = NULL;
4147 char **canonical = (char **) NULL;
4148 int thread = -1; /* All threads. */
4150 /* Set a breakpoint on the specified hook. */
4151 sals = decode_line_1 (&hookname, 1, (struct symtab *) NULL, 0, &canonical);
4152 addr_end = hookname;
4154 if (sals.nelts == 0)
4156 warning ("Unable to set a breakpoint on dynamic linker callback.");
4157 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4158 warning ("GDB will be unable to track shl_load/shl_unload calls");
4161 if (sals.nelts != 1)
4163 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4164 warning ("GDB will be unable to track shl_load/shl_unload calls");
4168 /* Make sure that all storage allocated in decode_line_1 gets freed
4169 in case the following errors out. */
4170 old_chain = make_cleanup (xfree, sals.sals);
4171 if (canonical != (char **) NULL)
4173 make_cleanup (xfree, canonical);
4174 canonical_strings_chain = make_cleanup (null_cleanup, 0);
4175 if (canonical[0] != NULL)
4176 make_cleanup (xfree, canonical[0]);
4179 resolve_sal_pc (&sals.sals[0]);
4181 /* Remove the canonical strings from the cleanup, they are needed below. */
4182 if (canonical != (char **) NULL)
4183 discard_cleanups (canonical_strings_chain);
4185 b = set_raw_breakpoint (sals.sals[0], bp_kind);
4186 set_breakpoint_count (breakpoint_count + 1);
4187 b->number = breakpoint_count;
4189 b->cond_string = (cond_string == NULL) ?
4190 NULL : savestring (cond_string, strlen (cond_string));
4193 if (canonical != (char **) NULL && canonical[0] != NULL)
4194 b->addr_string = canonical[0];
4195 else if (addr_start)
4196 b->addr_string = savestring (addr_start, addr_end - addr_start);
4198 b->enable = enabled;
4199 b->disposition = tempflag ? del : donttouch;
4201 if (dll_pathname == NULL)
4202 b->dll_pathname = NULL;
4205 b->dll_pathname = (char *) xmalloc (strlen (dll_pathname) + 1);
4206 strcpy (b->dll_pathname, dll_pathname);
4210 do_cleanups (old_chain);
4214 create_solib_load_event_breakpoint (char *hookname, int tempflag,
4215 char *dll_pathname, char *cond_string)
4217 solib_load_unload_1 (hookname, tempflag, dll_pathname,
4218 cond_string, bp_catch_load);
4222 create_solib_unload_event_breakpoint (char *hookname, int tempflag,
4223 char *dll_pathname, char *cond_string)
4225 solib_load_unload_1 (hookname,tempflag, dll_pathname,
4226 cond_string, bp_catch_unload);
4230 create_fork_vfork_event_catchpoint (int tempflag, char *cond_string,
4231 enum bptype bp_kind)
4233 struct symtab_and_line sal;
4234 struct breakpoint *b;
4235 int thread = -1; /* All threads. */
4242 b = set_raw_breakpoint (sal, bp_kind);
4243 set_breakpoint_count (breakpoint_count + 1);
4244 b->number = breakpoint_count;
4246 b->cond_string = (cond_string == NULL) ?
4247 NULL : savestring (cond_string, strlen (cond_string));
4249 b->addr_string = NULL;
4250 b->enable = enabled;
4251 b->disposition = tempflag ? del : donttouch;
4252 b->forked_inferior_pid = 0;
4258 create_fork_event_catchpoint (int tempflag, char *cond_string)
4260 create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_fork);
4264 create_vfork_event_catchpoint (int tempflag, char *cond_string)
4266 create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_vfork);
4270 create_exec_event_catchpoint (int tempflag, char *cond_string)
4272 struct symtab_and_line sal;
4273 struct breakpoint *b;
4274 int thread = -1; /* All threads. */
4281 b = set_raw_breakpoint (sal, bp_catch_exec);
4282 set_breakpoint_count (breakpoint_count + 1);
4283 b->number = breakpoint_count;
4285 b->cond_string = (cond_string == NULL) ?
4286 NULL : savestring (cond_string, strlen (cond_string));
4288 b->addr_string = NULL;
4289 b->enable = enabled;
4290 b->disposition = tempflag ? del : donttouch;
4296 hw_breakpoint_used_count (void)
4298 register struct breakpoint *b;
4303 if (b->type == bp_hardware_breakpoint && b->enable == enabled)
4311 hw_watchpoint_used_count (enum bptype type, int *other_type_used)
4313 register struct breakpoint *b;
4316 *other_type_used = 0;
4319 if (b->enable == enabled)
4321 if (b->type == type)
4323 else if ((b->type == bp_hardware_watchpoint ||
4324 b->type == bp_read_watchpoint ||
4325 b->type == bp_access_watchpoint)
4326 && b->enable == enabled)
4327 *other_type_used = 1;
4333 /* Call this after hitting the longjmp() breakpoint. Use this to set
4334 a new breakpoint at the target of the jmp_buf.
4336 FIXME - This ought to be done by setting a temporary breakpoint
4337 that gets deleted automatically... */
4340 set_longjmp_resume_breakpoint (CORE_ADDR pc, struct frame_info *frame)
4342 register struct breakpoint *b;
4345 if (b->type == bp_longjmp_resume)
4348 b->enable = enabled;
4350 b->frame = frame->frame;
4353 check_duplicates (b);
4359 disable_watchpoints_before_interactive_call_start (void)
4361 struct breakpoint *b;
4365 if (((b->type == bp_watchpoint)
4366 || (b->type == bp_hardware_watchpoint)
4367 || (b->type == bp_read_watchpoint)
4368 || (b->type == bp_access_watchpoint)
4369 || ep_is_exception_catchpoint (b))
4370 && (b->enable == enabled))
4372 b->enable = call_disabled;
4373 check_duplicates (b);
4379 enable_watchpoints_after_interactive_call_stop (void)
4381 struct breakpoint *b;
4385 if (((b->type == bp_watchpoint)
4386 || (b->type == bp_hardware_watchpoint)
4387 || (b->type == bp_read_watchpoint)
4388 || (b->type == bp_access_watchpoint)
4389 || ep_is_exception_catchpoint (b))
4390 && (b->enable == call_disabled))
4392 b->enable = enabled;
4393 check_duplicates (b);
4399 /* Set a breakpoint that will evaporate an end of command
4400 at address specified by SAL.
4401 Restrict it to frame FRAME if FRAME is nonzero. */
4404 set_momentary_breakpoint (struct symtab_and_line sal, struct frame_info *frame,
4407 register struct breakpoint *b;
4408 b = set_raw_breakpoint (sal, type);
4409 b->enable = enabled;
4410 b->disposition = donttouch;
4411 b->frame = (frame ? frame->frame : 0);
4413 /* If we're debugging a multi-threaded program, then we
4414 want momentary breakpoints to be active in only a
4415 single thread of control. */
4416 if (in_thread_list (inferior_ptid))
4417 b->thread = pid_to_thread_id (inferior_ptid);
4423 /* Tell the user we have just set a breakpoint B. */
4426 mention (struct breakpoint *b)
4430 struct cleanup *old_chain;
4431 struct ui_stream *stb;
4433 stb = ui_out_stream_new (uiout);
4434 old_chain = make_cleanup_ui_out_stream_delete (stb);
4437 /* FIXME: This is misplaced; mention() is called by things (like hitting a
4438 watchpoint) other than breakpoint creation. It should be possible to
4439 clean this up and at the same time replace the random calls to
4440 breakpoint_changed with this hook, as has already been done for
4441 delete_breakpoint_hook and so on. */
4442 if (create_breakpoint_hook)
4443 create_breakpoint_hook (b);
4444 breakpoint_create_event (b->number);
4449 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b->number);
4453 ui_out_text (uiout, "Watchpoint ");
4454 ui_out_tuple_begin (uiout, "wpt");
4455 ui_out_field_int (uiout, "number", b->number);
4456 ui_out_text (uiout, ": ");
4457 print_expression (b->exp, stb->stream);
4458 ui_out_field_stream (uiout, "exp", stb);
4459 ui_out_tuple_end (uiout);
4461 case bp_hardware_watchpoint:
4462 ui_out_text (uiout, "Hardware watchpoint ");
4463 ui_out_tuple_begin (uiout, "wpt");
4464 ui_out_field_int (uiout, "number", b->number);
4465 ui_out_text (uiout, ": ");
4466 print_expression (b->exp, stb->stream);
4467 ui_out_field_stream (uiout, "exp", stb);
4468 ui_out_tuple_end (uiout);
4472 printf_filtered ("Watchpoint %d: ", b->number);
4473 print_expression (b->exp, gdb_stdout);
4475 case bp_hardware_watchpoint:
4476 printf_filtered ("Hardware watchpoint %d: ", b->number);
4477 print_expression (b->exp, gdb_stdout);
4481 case bp_read_watchpoint:
4482 ui_out_text (uiout, "Hardware read watchpoint ");
4483 ui_out_tuple_begin (uiout, "hw-rwpt");
4484 ui_out_field_int (uiout, "number", b->number);
4485 ui_out_text (uiout, ": ");
4486 print_expression (b->exp, stb->stream);
4487 ui_out_field_stream (uiout, "exp", stb);
4488 ui_out_tuple_end (uiout);
4490 case bp_access_watchpoint:
4491 ui_out_text (uiout, "Hardware access (read/write) watchpoint ");
4492 ui_out_tuple_begin (uiout, "hw-awpt");
4493 ui_out_field_int (uiout, "number", b->number);
4494 ui_out_text (uiout, ": ");
4495 print_expression (b->exp, stb->stream);
4496 ui_out_field_stream (uiout, "exp", stb);
4497 ui_out_tuple_end (uiout);
4500 case bp_read_watchpoint:
4501 printf_filtered ("Hardware read watchpoint %d: ", b->number);
4502 print_expression (b->exp, gdb_stdout);
4504 case bp_access_watchpoint:
4505 printf_filtered ("Hardware access (read/write) watchpoint %d: ",
4507 print_expression (b->exp, gdb_stdout);
4512 if (interpreter_p && strncmp (interpreter_p, "mi", 2) == 0)
4518 printf_filtered ("Breakpoint %d", b->number);
4521 case bp_hardware_breakpoint:
4523 if (interpreter_p && strncmp (interpreter_p, "mi", 2) == 0)
4529 printf_filtered ("Hardware assisted breakpoint %d", b->number);
4533 case bp_catch_unload:
4534 printf_filtered ("Catchpoint %d (%s %s)",
4536 (b->type == bp_catch_load) ? "load" : "unload",
4537 (b->dll_pathname != NULL) ?
4538 b->dll_pathname : "<any library>");
4541 case bp_catch_vfork:
4542 printf_filtered ("Catchpoint %d (%s)",
4544 (b->type == bp_catch_fork) ? "fork" : "vfork");
4547 printf_filtered ("Catchpoint %d (exec)",
4550 case bp_catch_catch:
4551 case bp_catch_throw:
4552 printf_filtered ("Catchpoint %d (%s)",
4554 (b->type == bp_catch_catch) ? "catch" : "throw");
4560 case bp_longjmp_resume:
4561 case bp_step_resume:
4562 case bp_through_sigtramp:
4564 case bp_watchpoint_scope:
4565 case bp_shlib_event:
4566 case bp_thread_event:
4571 if (addressprint || b->source_file == NULL)
4573 printf_filtered (" at ");
4574 print_address_numeric (b->address, 1, gdb_stdout);
4577 printf_filtered (": file %s, line %d.",
4578 b->source_file, b->line_number);
4579 TUIDO (((TuiOpaqueFuncPtr) tui_vAllSetHasBreakAt, b, 1));
4580 TUIDO (((TuiOpaqueFuncPtr) tuiUpdateAllExecInfos));
4583 do_cleanups (old_chain);
4586 if (interpreter_p && strncmp (interpreter_p, "mi", 2) == 0)
4589 printf_filtered ("\n");
4593 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4594 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4595 COND[i] and COND_STRING[i] values.
4597 NOTE: If the function succeeds, the caller is expected to cleanup
4598 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4599 array contents). If the function fails (error() is called), the
4600 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4601 COND and SALS arrays and each of those arrays contents. */
4604 create_breakpoints (struct symtabs_and_lines sals, char **addr_string,
4605 struct expression **cond, char **cond_string,
4606 enum bptype type, enum bpdisp disposition,
4607 int thread, int ignore_count, int from_tty)
4609 if (type == bp_hardware_breakpoint)
4611 int i = hw_breakpoint_used_count ();
4612 int target_resources_ok =
4613 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint,
4615 if (target_resources_ok == 0)
4616 error ("No hardware breakpoint support in the target.");
4617 else if (target_resources_ok < 0)
4618 error ("Hardware breakpoints used exceeds limit.");
4621 /* Now set all the breakpoints. */
4624 for (i = 0; i < sals.nelts; i++)
4626 struct breakpoint *b;
4627 struct symtab_and_line sal = sals.sals[i];
4630 describe_other_breakpoints (sal.pc, sal.section);
4632 b = set_raw_breakpoint (sal, type);
4633 set_breakpoint_count (breakpoint_count + 1);
4634 b->number = breakpoint_count;
4637 b->addr_string = addr_string[i];
4638 b->cond_string = cond_string[i];
4639 b->ignore_count = ignore_count;
4640 b->enable = enabled;
4641 b->disposition = disposition;
4647 /* Parse ARG which is assumed to be a SAL specification possibly
4648 followed by conditionals. On return, SALS contains an array of SAL
4649 addresses found. ADDR_STRING contains a vector of (canonical)
4650 address strings. ARG points to the end of the SAL. */
4653 parse_breakpoint_sals (char **address,
4654 struct symtabs_and_lines *sals,
4655 char ***addr_string)
4657 char *addr_start = *address;
4658 *addr_string = NULL;
4659 /* If no arg given, or if first arg is 'if ', use the default
4661 if ((*address) == NULL
4662 || (strncmp ((*address), "if", 2) == 0 && isspace ((*address)[2])))
4664 if (default_breakpoint_valid)
4666 struct symtab_and_line sal;
4667 INIT_SAL (&sal); /* initialize to zeroes */
4668 sals->sals = (struct symtab_and_line *)
4669 xmalloc (sizeof (struct symtab_and_line));
4670 sal.pc = default_breakpoint_address;
4671 sal.line = default_breakpoint_line;
4672 sal.symtab = default_breakpoint_symtab;
4673 sal.section = find_pc_overlay (sal.pc);
4674 sals->sals[0] = sal;
4678 error ("No default breakpoint address now.");
4682 /* Force almost all breakpoints to be in terms of the
4683 current_source_symtab (which is decode_line_1's default). This
4684 should produce the results we want almost all of the time while
4685 leaving default_breakpoint_* alone. */
4686 if (default_breakpoint_valid
4687 && (!current_source_symtab
4688 || (strchr ("+-", (*address)[0]) != NULL)))
4689 *sals = decode_line_1 (address, 1, default_breakpoint_symtab,
4690 default_breakpoint_line, addr_string);
4692 *sals = decode_line_1 (address, 1, (struct symtab *) NULL, 0, addr_string);
4694 /* For any SAL that didn't have a canonical string, fill one in. */
4695 if (sals->nelts > 0 && *addr_string == NULL)
4696 *addr_string = xcalloc (sals->nelts, sizeof (char **));
4697 if (addr_start != (*address))
4700 for (i = 0; i < sals->nelts; i++)
4702 /* Add the string if not present. */
4703 if ((*addr_string)[i] == NULL)
4704 (*addr_string)[i] = savestring (addr_start, (*address) - addr_start);
4710 /* Convert each SAL into a real PC. Verify that the PC can be
4711 inserted as a breakpoint. If it can't throw an error. */
4714 breakpoint_sals_to_pc (struct symtabs_and_lines *sals,
4718 for (i = 0; i < sals->nelts; i++)
4720 resolve_sal_pc (&sals->sals[i]);
4722 /* It's possible for the PC to be nonzero, but still an illegal
4723 value on some targets.
4725 For example, on HP-UX if you start gdb, and before running the
4726 inferior you try to set a breakpoint on a shared library function
4727 "foo" where the inferior doesn't call "foo" directly but does
4728 pass its address to another function call, then we do find a
4729 minimal symbol for the "foo", but it's address is invalid.
4730 (Appears to be an index into a table that the loader sets up
4731 when the inferior is run.)
4733 Give the target a chance to bless sals.sals[i].pc before we
4734 try to make a breakpoint for it. */
4735 if (PC_REQUIRES_RUN_BEFORE_USE (sals->sals[i].pc))
4737 if (address == NULL)
4738 error ("Cannot break without a running program.");
4740 error ("Cannot break on %s without a running program.",
4746 /* Set a breakpoint according to ARG (function, linenum or *address)
4747 flag: first bit : 0 non-temporary, 1 temporary.
4748 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
4751 break_command_1 (char *arg, int flag, int from_tty)
4753 int tempflag, hardwareflag;
4754 struct symtabs_and_lines sals;
4755 register struct expression **cond = 0;
4756 /* Pointers in arg to the start, and one past the end, of the
4758 char **cond_string = (char **) NULL;
4759 char *addr_start = arg;
4761 struct cleanup *old_chain;
4762 struct cleanup *breakpoint_chain = NULL;
4765 int ignore_count = 0;
4767 hardwareflag = flag & BP_HARDWAREFLAG;
4768 tempflag = flag & BP_TEMPFLAG;
4773 parse_breakpoint_sals (&arg, &sals, &addr_string);
4778 /* Create a chain of things that always need to be cleaned up. */
4779 old_chain = make_cleanup (null_cleanup, 0);
4781 /* Make sure that all storage allocated to SALS gets freed. */
4782 make_cleanup (xfree, sals.sals);
4784 /* Cleanup the addr_string array but not its contents. */
4785 make_cleanup (xfree, addr_string);
4787 /* Allocate space for all the cond expressions. */
4788 cond = xcalloc (sals.nelts, sizeof (struct expression *));
4789 make_cleanup (xfree, cond);
4791 /* Allocate space for all the cond strings. */
4792 cond_string = xcalloc (sals.nelts, sizeof (char **));
4793 make_cleanup (xfree, cond_string);
4795 /* ----------------------------- SNIP -----------------------------
4796 Anything added to the cleanup chain beyond this point is assumed
4797 to be part of a breakpoint. If the breakpoint create succeeds
4798 then the memory is not reclaimed. */
4799 breakpoint_chain = make_cleanup (null_cleanup, 0);
4801 /* Mark the contents of the addr_string for cleanup. These go on
4802 the breakpoint_chain and only occure if the breakpoint create
4804 for (i = 0; i < sals.nelts; i++)
4806 if (addr_string[i] != NULL)
4807 make_cleanup (xfree, addr_string[i]);
4810 /* Resolve all line numbers to PC's and verify that the addresses
4811 are ok for the target. */
4812 breakpoint_sals_to_pc (&sals, addr_start);
4814 /* Verify that condition can be parsed, before setting any
4815 breakpoints. Allocate a separate condition expression for each
4817 thread = -1; /* No specific thread yet */
4818 for (i = 0; i < sals.nelts; i++)
4825 char *cond_start = NULL;
4826 char *cond_end = NULL;
4827 while (*tok == ' ' || *tok == '\t')
4832 while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
4835 toklen = end_tok - tok;
4837 if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
4839 tok = cond_start = end_tok + 1;
4840 cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0);
4841 make_cleanup (xfree, cond[i]);
4843 cond_string[i] = savestring (cond_start, cond_end - cond_start);
4844 make_cleanup (xfree, cond_string[i]);
4846 else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0)
4852 thread = strtol (tok, &tok, 0);
4854 error ("Junk after thread keyword.");
4855 if (!valid_thread_id (thread))
4856 error ("Unknown thread %d\n", thread);
4859 error ("Junk at end of arguments.");
4863 create_breakpoints (sals, addr_string, cond, cond_string,
4864 hardwareflag ? bp_hardware_breakpoint : bp_breakpoint,
4865 tempflag ? del : donttouch,
4866 thread, ignore_count, from_tty);
4870 warning ("Multiple breakpoints were set.");
4871 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
4873 /* That's it. Discard the cleanups for data inserted into the
4875 discard_cleanups (breakpoint_chain);
4876 /* But cleanup everything else. */
4877 do_cleanups (old_chain);
4880 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
4881 linenum or *address) with COND and IGNORE_COUNT. */
4883 struct captured_breakpoint_args
4894 do_captured_breakpoint (void *data)
4896 struct captured_breakpoint_args *args = data;
4897 struct symtabs_and_lines sals;
4898 register struct expression **cond;
4899 struct cleanup *old_chain;
4900 struct cleanup *breakpoint_chain = NULL;
4907 /* Parse the source and lines spec. Delay check that the expression
4908 didn't contain trailing garbage until after cleanups are in
4912 address_end = args->address;
4914 parse_breakpoint_sals (&address_end, &sals, &addr_string);
4919 /* Create a chain of things at always need to be cleaned up. */
4920 old_chain = make_cleanup (null_cleanup, 0);
4922 /* Always have a addr_string array, even if it is empty. */
4923 make_cleanup (xfree, addr_string);
4925 /* Make sure that all storage allocated to SALS gets freed. */
4926 make_cleanup (xfree, sals.sals);
4928 /* Allocate space for all the cond expressions. */
4929 cond = xcalloc (sals.nelts, sizeof (struct expression *));
4930 make_cleanup (xfree, cond);
4932 /* Allocate space for all the cond strings. */
4933 cond_string = xcalloc (sals.nelts, sizeof (char **));
4934 make_cleanup (xfree, cond_string);
4936 /* ----------------------------- SNIP -----------------------------
4937 Anything added to the cleanup chain beyond this point is assumed
4938 to be part of a breakpoint. If the breakpoint create goes
4939 through then that memory is not cleaned up. */
4940 breakpoint_chain = make_cleanup (null_cleanup, 0);
4942 /* Mark the contents of the addr_string for cleanup. These go on
4943 the breakpoint_chain and only occure if the breakpoint create
4945 for (i = 0; i < sals.nelts; i++)
4947 if (addr_string[i] != NULL)
4948 make_cleanup (xfree, addr_string[i]);
4951 /* Wait until now before checking for garbage at the end of the
4952 address. That way cleanups can take care of freeing any
4954 if (*address_end != '\0')
4955 error ("Garbage %s following breakpoint address", address_end);
4957 /* Resolve all line numbers to PC's. */
4958 breakpoint_sals_to_pc (&sals, args->address);
4960 /* Verify that conditions can be parsed, before setting any
4962 for (i = 0; i < sals.nelts; i++)
4964 if (args->condition != NULL)
4966 char *tok = args->condition;
4967 cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0);
4969 error ("Garbage %s follows condition", tok);
4970 make_cleanup (xfree, cond[i]);
4971 cond_string[i] = xstrdup (args->condition);
4975 create_breakpoints (sals, addr_string, cond, cond_string,
4976 args->hardwareflag ? bp_hardware_breakpoint : bp_breakpoint,
4977 args->tempflag ? del : donttouch,
4978 args->thread, args->ignore_count, 0/*from-tty*/);
4980 /* That's it. Discard the cleanups for data inserted into the
4982 discard_cleanups (breakpoint_chain);
4983 /* But cleanup everything else. */
4984 do_cleanups (old_chain);
4989 gdb_breakpoint (char *address, char *condition,
4990 int hardwareflag, int tempflag,
4991 int thread, int ignore_count)
4993 struct captured_breakpoint_args args;
4994 args.address = address;
4995 args.condition = condition;
4996 args.hardwareflag = hardwareflag;
4997 args.tempflag = tempflag;
4998 args.thread = thread;
4999 args.ignore_count = ignore_count;
5000 return catch_errors (do_captured_breakpoint, &args,
5001 NULL, RETURN_MASK_ALL);
5006 break_at_finish_at_depth_command_1 (char *arg, int flag, int from_tty)
5008 struct frame_info *frame;
5009 CORE_ADDR low, high, selected_pc = 0;
5010 char *extra_args = NULL;
5013 int extra_args_len = 0, if_arg = 0;
5016 (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t')))
5019 if (default_breakpoint_valid)
5023 selected_pc = selected_frame->pc;
5028 error ("No selected frame.");
5031 error ("No default breakpoint address now.");
5035 extra_args = strchr (arg, ' ');
5039 extra_args_len = strlen (extra_args);
5040 level_arg = (char *) xmalloc (extra_args - arg);
5041 strncpy (level_arg, arg, extra_args - arg - 1);
5042 level_arg[extra_args - arg - 1] = '\0';
5046 level_arg = (char *) xmalloc (strlen (arg) + 1);
5047 strcpy (level_arg, arg);
5050 frame = parse_frame_specification (level_arg);
5052 selected_pc = frame->pc;
5059 extra_args_len = strlen (arg);
5064 if (find_pc_partial_function (selected_pc, (char **) NULL, &low, &high))
5066 addr_string = (char *) xmalloc (26 + extra_args_len);
5068 sprintf (addr_string, "*0x%s %s", paddr_nz (high), extra_args);
5070 sprintf (addr_string, "*0x%s", paddr_nz (high));
5071 break_command_1 (addr_string, flag, from_tty);
5072 xfree (addr_string);
5075 error ("No function contains the specified address");
5078 error ("Unable to set breakpoint at procedure exit");
5083 break_at_finish_command_1 (char *arg, int flag, int from_tty)
5085 char *addr_string, *break_string, *beg_addr_string;
5086 CORE_ADDR low, high;
5087 struct symtabs_and_lines sals;
5088 struct symtab_and_line sal;
5089 struct cleanup *old_chain;
5090 char *extra_args = NULL;
5091 int extra_args_len = 0;
5095 (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t')))
5097 if (default_breakpoint_valid)
5101 addr_string = (char *) xmalloc (15);
5102 sprintf (addr_string, "*0x%s", paddr_nz (selected_frame->pc));
5107 error ("No selected frame.");
5110 error ("No default breakpoint address now.");
5114 addr_string = (char *) xmalloc (strlen (arg) + 1);
5115 strcpy (addr_string, arg);
5121 extra_args_len = strlen (arg);
5125 /* get the stuff after the function name or address */
5126 extra_args = strchr (arg, ' ');
5130 extra_args_len = strlen (extra_args);
5137 beg_addr_string = addr_string;
5138 sals = decode_line_1 (&addr_string, 1, (struct symtab *) NULL, 0,
5141 xfree (beg_addr_string);
5142 old_chain = make_cleanup (xfree, sals.sals);
5143 for (i = 0; (i < sals.nelts); i++)
5146 if (find_pc_partial_function (sal.pc, (char **) NULL, &low, &high))
5148 break_string = (char *) xmalloc (extra_args_len + 26);
5150 sprintf (break_string, "*0x%s %s", paddr_nz (high), extra_args);
5152 sprintf (break_string, "*0x%s", paddr_nz (high));
5153 break_command_1 (break_string, flag, from_tty);
5154 xfree (break_string);
5157 error ("No function contains the specified address");
5161 warning ("Multiple breakpoints were set.\n");
5162 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5164 do_cleanups (old_chain);
5168 /* Helper function for break_command_1 and disassemble_command. */
5171 resolve_sal_pc (struct symtab_and_line *sal)
5175 if (sal->pc == 0 && sal->symtab != NULL)
5177 if (!find_line_pc (sal->symtab, sal->line, &pc))
5178 error ("No line %d in file \"%s\".",
5179 sal->line, sal->symtab->filename);
5183 if (sal->section == 0 && sal->symtab != NULL)
5185 struct blockvector *bv;
5190 bv = blockvector_for_pc_sect (sal->pc, 0, &index, sal->symtab);
5193 b = BLOCKVECTOR_BLOCK (bv, index);
5194 sym = block_function (b);
5197 fixup_symbol_section (sym, sal->symtab->objfile);
5198 sal->section = SYMBOL_BFD_SECTION (sym);
5202 /* It really is worthwhile to have the section, so we'll just
5203 have to look harder. This case can be executed if we have
5204 line numbers but no functions (as can happen in assembly
5207 struct minimal_symbol *msym;
5209 msym = lookup_minimal_symbol_by_pc (sal->pc);
5211 sal->section = SYMBOL_BFD_SECTION (msym);
5218 break_command (char *arg, int from_tty)
5220 break_command_1 (arg, 0, from_tty);
5224 break_at_finish_command (char *arg, int from_tty)
5226 break_at_finish_command_1 (arg, 0, from_tty);
5230 break_at_finish_at_depth_command (char *arg, int from_tty)
5232 break_at_finish_at_depth_command_1 (arg, 0, from_tty);
5236 tbreak_command (char *arg, int from_tty)
5238 break_command_1 (arg, BP_TEMPFLAG, from_tty);
5242 tbreak_at_finish_command (char *arg, int from_tty)
5244 break_at_finish_command_1 (arg, BP_TEMPFLAG, from_tty);
5248 hbreak_command (char *arg, int from_tty)
5250 break_command_1 (arg, BP_HARDWAREFLAG, from_tty);
5254 thbreak_command (char *arg, int from_tty)
5256 break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty);
5260 stop_command (char *arg, int from_tty)
5262 printf_filtered ("Specify the type of breakpoint to set.\n\
5263 Usage: stop in <function | address>\n\
5268 stopin_command (char *arg, int from_tty)
5272 if (arg == (char *) NULL)
5274 else if (*arg != '*')
5279 /* look for a ':'. If this is a line number specification, then
5280 say it is bad, otherwise, it should be an address or
5281 function/method name */
5282 while (*argptr && !hasColon)
5284 hasColon = (*argptr == ':');
5289 badInput = (*argptr != ':'); /* Not a class::method */
5291 badInput = isdigit (*arg); /* a simple line number */
5295 printf_filtered ("Usage: stop in <function | address>\n");
5297 break_command_1 (arg, 0, from_tty);
5301 stopat_command (char *arg, int from_tty)
5305 if (arg == (char *) NULL || *arg == '*') /* no line number */
5312 /* look for a ':'. If there is a '::' then get out, otherwise
5313 it is probably a line number. */
5314 while (*argptr && !hasColon)
5316 hasColon = (*argptr == ':');
5321 badInput = (*argptr == ':'); /* we have class::method */
5323 badInput = !isdigit (*arg); /* not a line number */
5327 printf_filtered ("Usage: stop at <line>\n");
5329 break_command_1 (arg, 0, from_tty);
5333 /* accessflag: hw_write: watch write,
5334 hw_read: watch read,
5335 hw_access: watch access (read or write) */
5337 watch_command_1 (char *arg, int accessflag, int from_tty)
5339 struct breakpoint *b;
5340 struct symtab_and_line sal;
5341 struct expression *exp;
5342 struct block *exp_valid_block;
5343 struct value *val, *mark;
5344 struct frame_info *frame;
5345 struct frame_info *prev_frame = NULL;
5346 char *exp_start = NULL;
5347 char *exp_end = NULL;
5348 char *tok, *end_tok;
5350 char *cond_start = NULL;
5351 char *cond_end = NULL;
5352 struct expression *cond = NULL;
5353 int i, other_type_used, target_resources_ok = 0;
5354 enum bptype bp_type;
5357 INIT_SAL (&sal); /* initialize to zeroes */
5359 /* Parse arguments. */
5360 innermost_block = NULL;
5362 exp = parse_exp_1 (&arg, 0, 0);
5364 exp_valid_block = innermost_block;
5365 mark = value_mark ();
5366 val = evaluate_expression (exp);
5367 release_value (val);
5368 if (VALUE_LAZY (val))
5369 value_fetch_lazy (val);
5372 while (*tok == ' ' || *tok == '\t')
5376 while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
5379 toklen = end_tok - tok;
5380 if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
5382 tok = cond_start = end_tok + 1;
5383 cond = parse_exp_1 (&tok, 0, 0);
5387 error ("Junk at end of command.");
5389 if (accessflag == hw_read)
5390 bp_type = bp_read_watchpoint;
5391 else if (accessflag == hw_access)
5392 bp_type = bp_access_watchpoint;
5394 bp_type = bp_hardware_watchpoint;
5396 mem_cnt = can_use_hardware_watchpoint (val);
5397 if (mem_cnt == 0 && bp_type != bp_hardware_watchpoint)
5398 error ("Expression cannot be implemented with read/access watchpoint.");
5401 i = hw_watchpoint_used_count (bp_type, &other_type_used);
5402 target_resources_ok =
5403 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type, i + mem_cnt,
5405 if (target_resources_ok == 0 && bp_type != bp_hardware_watchpoint)
5406 error ("Target does not support this type of hardware watchpoint.");
5408 if (target_resources_ok < 0 && bp_type != bp_hardware_watchpoint)
5409 error ("Target can only support one kind of HW watchpoint at a time.");
5412 #if defined(HPUXHPPA)
5413 /* On HP-UX if you set a h/w
5414 watchpoint before the "run" command, the inferior dies with a e.g.,
5415 SIGILL once you start it. I initially believed this was due to a
5416 bad interaction between page protection traps and the initial
5417 startup sequence by the dynamic linker.
5419 However, I tried avoiding that by having HP-UX's implementation of
5420 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5421 yet, which forced slow watches before a "run" or "attach", and it
5422 still fails somewhere in the startup code.
5424 Until I figure out what's happening, I'm disallowing watches altogether
5425 before the "run" or "attach" command. We'll tell the user they must
5426 set watches after getting the program started. */
5427 if (!target_has_execution)
5429 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5432 #endif /* HPUXHPPA */
5434 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5435 watchpoint could not be set. */
5436 if (!mem_cnt || target_resources_ok <= 0)
5437 bp_type = bp_watchpoint;
5439 /* Now set up the breakpoint. */
5440 b = set_raw_breakpoint (sal, bp_type);
5441 set_breakpoint_count (breakpoint_count + 1);
5442 b->number = breakpoint_count;
5443 b->disposition = donttouch;
5445 b->exp_valid_block = exp_valid_block;
5446 b->exp_string = savestring (exp_start, exp_end - exp_start);
5450 b->cond_string = savestring (cond_start, cond_end - cond_start);
5454 frame = block_innermost_frame (exp_valid_block);
5457 prev_frame = get_prev_frame (frame);
5458 b->watchpoint_frame = frame->frame;
5461 b->watchpoint_frame = (CORE_ADDR) 0;
5463 /* If the expression is "local", then set up a "watchpoint scope"
5464 breakpoint at the point where we've left the scope of the watchpoint
5466 if (innermost_block)
5470 struct breakpoint *scope_breakpoint;
5471 struct symtab_and_line scope_sal;
5473 INIT_SAL (&scope_sal); /* initialize to zeroes */
5474 scope_sal.pc = get_frame_pc (prev_frame);
5475 scope_sal.section = find_pc_overlay (scope_sal.pc);
5477 scope_breakpoint = set_raw_breakpoint (scope_sal,
5478 bp_watchpoint_scope);
5479 set_breakpoint_count (breakpoint_count + 1);
5480 scope_breakpoint->number = breakpoint_count;
5482 scope_breakpoint->enable = enabled;
5484 /* Automatically delete the breakpoint when it hits. */
5485 scope_breakpoint->disposition = del;
5487 /* Only break in the proper frame (help with recursion). */
5488 scope_breakpoint->frame = prev_frame->frame;
5490 /* Set the address at which we will stop. */
5491 scope_breakpoint->address = get_frame_pc (prev_frame);
5493 /* The scope breakpoint is related to the watchpoint. We
5494 will need to act on them together. */
5495 b->related_breakpoint = scope_breakpoint;
5498 value_free_to_mark (mark);
5502 /* Return count of locations need to be watched and can be handled
5503 in hardware. If the watchpoint can not be handled
5504 in hardware return zero. */
5506 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
5507 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
5508 ((BYTE_SIZE) <= (REGISTER_SIZE))
5511 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5512 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5513 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5517 can_use_hardware_watchpoint (struct value *v)
5519 int found_memory_cnt = 0;
5520 struct value *head = v;
5522 /* Did the user specifically forbid us to use hardware watchpoints? */
5523 if (!can_use_hw_watchpoints)
5526 /* Make sure that the value of the expression depends only upon
5527 memory contents, and values computed from them within GDB. If we
5528 find any register references or function calls, we can't use a
5529 hardware watchpoint.
5531 The idea here is that evaluating an expression generates a series
5532 of values, one holding the value of every subexpression. (The
5533 expression a*b+c has five subexpressions: a, b, a*b, c, and
5534 a*b+c.) GDB's values hold almost enough information to establish
5535 the criteria given above --- they identify memory lvalues,
5536 register lvalues, computed values, etcetera. So we can evaluate
5537 the expression, and then scan the chain of values that leaves
5538 behind to decide whether we can detect any possible change to the
5539 expression's final value using only hardware watchpoints.
5541 However, I don't think that the values returned by inferior
5542 function calls are special in any way. So this function may not
5543 notice that an expression involving an inferior function call
5544 can't be watched with hardware watchpoints. FIXME. */
5545 for (; v; v = v->next)
5547 if (VALUE_LVAL (v) == lval_memory)
5550 /* A lazy memory lvalue is one that GDB never needed to fetch;
5551 we either just used its address (e.g., `a' in `a.b') or
5552 we never needed it at all (e.g., `a' in `a,b'). */
5556 /* Ahh, memory we actually used! Check if we can cover
5557 it with hardware watchpoints. */
5558 struct type *vtype = check_typedef (VALUE_TYPE (v));
5560 /* We only watch structs and arrays if user asked for it
5561 explicitly, never if they just happen to appear in a
5562 middle of some value chain. */
5564 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
5565 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
5567 CORE_ADDR vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
5568 int len = TYPE_LENGTH (VALUE_TYPE (v));
5570 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr, len))
5577 else if (v->lval != not_lval && v->modifiable == 0)
5578 return 0; /* ??? What does this represent? */
5579 else if (v->lval == lval_register)
5580 return 0; /* cannot watch a register with a HW watchpoint */
5583 /* The expression itself looks suitable for using a hardware
5584 watchpoint, but give the target machine a chance to reject it. */
5585 return found_memory_cnt;
5590 watch_command_wrapper (char *arg, int from_tty)
5592 watch_command (arg, from_tty);
5596 watch_command (char *arg, int from_tty)
5598 watch_command_1 (arg, hw_write, from_tty);
5603 rwatch_command_wrapper (char *arg, int from_tty)
5605 rwatch_command (arg, from_tty);
5609 rwatch_command (char *arg, int from_tty)
5611 watch_command_1 (arg, hw_read, from_tty);
5616 awatch_command_wrapper (char *arg, int from_tty)
5618 awatch_command (arg, from_tty);
5622 awatch_command (char *arg, int from_tty)
5624 watch_command_1 (arg, hw_access, from_tty);
5628 /* Helper routines for the until_command routine in infcmd.c. Here
5629 because it uses the mechanisms of breakpoints. */
5631 /* This function is called by fetch_inferior_event via the
5632 cmd_continuation pointer, to complete the until command. It takes
5633 care of cleaning up the temporary breakpoints set up by the until
5636 until_break_command_continuation (struct continuation_arg *arg)
5638 struct cleanup *cleanups;
5640 cleanups = (struct cleanup *) arg->data.pointer;
5641 do_exec_cleanups (cleanups);
5646 until_break_command (char *arg, int from_tty)
5648 struct symtabs_and_lines sals;
5649 struct symtab_and_line sal;
5650 struct frame_info *prev_frame = get_prev_frame (selected_frame);
5651 struct breakpoint *breakpoint;
5652 struct cleanup *old_chain;
5653 struct continuation_arg *arg1;
5656 clear_proceed_status ();
5658 /* Set a breakpoint where the user wants it and at return from
5661 if (default_breakpoint_valid)
5662 sals = decode_line_1 (&arg, 1, default_breakpoint_symtab,
5663 default_breakpoint_line, (char ***) NULL);
5665 sals = decode_line_1 (&arg, 1, (struct symtab *) NULL,
5666 0, (char ***) NULL);
5668 if (sals.nelts != 1)
5669 error ("Couldn't get information on specified line.");
5672 xfree (sals.sals); /* malloc'd, so freed */
5675 error ("Junk at end of arguments.");
5677 resolve_sal_pc (&sal);
5679 breakpoint = set_momentary_breakpoint (sal, selected_frame, bp_until);
5681 if (!event_loop_p || !target_can_async_p ())
5682 old_chain = make_cleanup_delete_breakpoint (breakpoint);
5684 old_chain = make_exec_cleanup_delete_breakpoint (breakpoint);
5686 /* If we are running asynchronously, and the target supports async
5687 execution, we are not waiting for the target to stop, in the call
5688 tp proceed, below. This means that we cannot delete the
5689 brekpoints until the target has actually stopped. The only place
5690 where we get a chance to do that is in fetch_inferior_event, so
5691 we must set things up for that. */
5693 if (event_loop_p && target_can_async_p ())
5695 /* In this case the arg for the continuation is just the point
5696 in the exec_cleanups chain from where to start doing
5697 cleanups, because all the continuation does is the cleanups in
5698 the exec_cleanup_chain. */
5700 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
5702 arg1->data.pointer = old_chain;
5704 add_continuation (until_break_command_continuation, arg1);
5707 /* Keep within the current frame */
5711 sal = find_pc_line (prev_frame->pc, 0);
5712 sal.pc = prev_frame->pc;
5713 breakpoint = set_momentary_breakpoint (sal, prev_frame, bp_until);
5714 if (!event_loop_p || !target_can_async_p ())
5715 make_cleanup_delete_breakpoint (breakpoint);
5717 make_exec_cleanup_delete_breakpoint (breakpoint);
5720 proceed (-1, TARGET_SIGNAL_DEFAULT, 0);
5721 /* Do the cleanups now, anly if we are not running asynchronously,
5722 of if we are, but the target is still synchronous. */
5723 if (!event_loop_p || !target_can_async_p ())
5724 do_cleanups (old_chain);
5728 /* These aren't used; I don't konw what they were for. */
5729 /* Set a breakpoint at the catch clause for NAME. */
5731 catch_breakpoint (char *name)
5736 disable_catch_breakpoint (void)
5741 delete_catch_breakpoint (void)
5746 enable_catch_breakpoint (void)
5753 struct sal_chain *next;
5754 struct symtab_and_line sal;
5758 /* Not really used -- invocation in handle_gnu_4_16_catch_command
5759 had been commented out in the v.4.16 sources, and stays
5760 disabled there now because "catch NAME" syntax isn't allowed.
5762 /* This isn't used; I don't know what it was for. */
5763 /* For each catch clause identified in ARGS, run FUNCTION
5764 with that clause as an argument. */
5765 static struct symtabs_and_lines
5766 map_catch_names (char *args, int (*function) ())
5768 register char *p = args;
5770 struct symtabs_and_lines sals;
5772 struct sal_chain *sal_chain = 0;
5776 error_no_arg ("one or more catch names");
5784 /* Don't swallow conditional part. */
5785 if (p1[0] == 'i' && p1[1] == 'f'
5786 && (p1[2] == ' ' || p1[2] == '\t'))
5792 while (isalnum (*p1) || *p1 == '_' || *p1 == '$')
5796 if (*p1 && *p1 != ' ' && *p1 != '\t')
5797 error ("Arguments must be catch names.");
5803 struct sal_chain *next = (struct sal_chain *)
5804 alloca (sizeof (struct sal_chain));
5805 next->next = sal_chain;
5806 next->sal = get_catch_sal (p);
5811 printf_unfiltered ("No catch clause for exception %s.\n", p);
5816 while (*p == ' ' || *p == '\t')
5822 /* This shares a lot of code with `print_frame_label_vars' from stack.c. */
5824 static struct symtabs_and_lines
5825 get_catch_sals (int this_level_only)
5827 register struct blockvector *bl;
5828 register struct block *block;
5829 int index, have_default = 0;
5831 struct symtabs_and_lines sals;
5832 struct sal_chain *sal_chain = 0;
5833 char *blocks_searched;
5835 /* Not sure whether an error message is always the correct response,
5836 but it's better than a core dump. */
5837 if (selected_frame == NULL)
5838 error ("No selected frame.");
5839 block = get_frame_block (selected_frame);
5840 pc = selected_frame->pc;
5846 error ("No symbol table info available.\n");
5848 bl = blockvector_for_pc (BLOCK_END (block) - 4, &index);
5849 blocks_searched = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
5850 memset (blocks_searched, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
5854 CORE_ADDR end = BLOCK_END (block) - 4;
5857 if (bl != blockvector_for_pc (end, &index))
5858 error ("blockvector blotch");
5859 if (BLOCKVECTOR_BLOCK (bl, index) != block)
5860 error ("blockvector botch");
5861 last_index = BLOCKVECTOR_NBLOCKS (bl);
5864 /* Don't print out blocks that have gone by. */
5865 while (index < last_index
5866 && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc)
5869 while (index < last_index
5870 && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end)
5872 if (blocks_searched[index] == 0)
5874 struct block *b = BLOCKVECTOR_BLOCK (bl, index);
5877 register struct symbol *sym;
5879 nsyms = BLOCK_NSYMS (b);
5881 for (i = 0; i < nsyms; i++)
5883 sym = BLOCK_SYM (b, i);
5884 if (STREQ (SYMBOL_NAME (sym), "default"))
5890 if (SYMBOL_CLASS (sym) == LOC_LABEL)
5892 struct sal_chain *next = (struct sal_chain *)
5893 alloca (sizeof (struct sal_chain));
5894 next->next = sal_chain;
5895 next->sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym),
5900 blocks_searched[index] = 1;
5906 if (sal_chain && this_level_only)
5909 /* After handling the function's top-level block, stop.
5910 Don't continue to its superblock, the block of
5911 per-file symbols. */
5912 if (BLOCK_FUNCTION (block))
5914 block = BLOCK_SUPERBLOCK (block);
5919 struct sal_chain *tmp_chain;
5921 /* Count the number of entries. */
5922 for (index = 0, tmp_chain = sal_chain; tmp_chain;
5923 tmp_chain = tmp_chain->next)
5927 sals.sals = (struct symtab_and_line *)
5928 xmalloc (index * sizeof (struct symtab_and_line));
5929 for (index = 0; sal_chain; sal_chain = sal_chain->next, index++)
5930 sals.sals[index] = sal_chain->sal;
5937 ep_skip_leading_whitespace (char **s)
5939 if ((s == NULL) || (*s == NULL))
5941 while (isspace (**s))
5945 /* This function examines a string, and attempts to find a token
5946 that might be an event name in the leading characters. If a
5947 possible match is found, a pointer to the last character of
5948 the token is returned. Else, NULL is returned. */
5951 ep_find_event_name_end (char *arg)
5954 char *event_name_end = NULL;
5956 /* If we could depend upon the presense of strrpbrk, we'd use that... */
5960 /* We break out of the loop when we find a token delimiter.
5961 Basically, we're looking for alphanumerics and underscores;
5962 anything else delimites the token. */
5965 if (!isalnum (*s) && (*s != '_'))
5971 return event_name_end;
5975 /* This function attempts to parse an optional "if <cond>" clause
5976 from the arg string. If one is not found, it returns NULL.
5978 Else, it returns a pointer to the condition string. (It does not
5979 attempt to evaluate the string against a particular block.) And,
5980 it updates arg to point to the first character following the parsed
5981 if clause in the arg string. */
5984 ep_parse_optional_if_clause (char **arg)
5988 if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace ((*arg)[2]))
5991 /* Skip the "if" keyword. */
5994 /* Skip any extra leading whitespace, and record the start of the
5995 condition string. */
5996 ep_skip_leading_whitespace (arg);
5999 /* Assume that the condition occupies the remainder of the arg string. */
6000 (*arg) += strlen (cond_string);
6005 /* This function attempts to parse an optional filename from the arg
6006 string. If one is not found, it returns NULL.
6008 Else, it returns a pointer to the parsed filename. (This function
6009 makes no attempt to verify that a file of that name exists, or is
6010 accessible.) And, it updates arg to point to the first character
6011 following the parsed filename in the arg string.
6013 Note that clients needing to preserve the returned filename for
6014 future access should copy it to their own buffers. */
6016 ep_parse_optional_filename (char **arg)
6018 static char filename[1024];
6023 if ((*arg_p == '\0') || isspace (*arg_p))
6041 /* Commands to deal with catching events, such as signals, exceptions,
6042 process start/exit, etc. */
6046 catch_fork, catch_vfork
6050 #if defined(CHILD_INSERT_FORK_CATCHPOINT) || defined(CHILD_INSERT_VFORK_CATCHPOINT)
6051 static void catch_fork_command_1 (catch_fork_kind fork_kind,
6052 char *arg, int tempflag, int from_tty);
6055 catch_fork_command_1 (catch_fork_kind fork_kind, char *arg, int tempflag,
6058 char *cond_string = NULL;
6060 ep_skip_leading_whitespace (&arg);
6062 /* The allowed syntax is:
6064 catch [v]fork if <cond>
6066 First, check if there's an if clause. */
6067 cond_string = ep_parse_optional_if_clause (&arg);
6069 if ((*arg != '\0') && !isspace (*arg))
6070 error ("Junk at end of arguments.");
6072 /* If this target supports it, create a fork or vfork catchpoint
6073 and enable reporting of such events. */
6077 create_fork_event_catchpoint (tempflag, cond_string);
6080 create_vfork_event_catchpoint (tempflag, cond_string);
6083 error ("unsupported or unknown fork kind; cannot catch it");
6089 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6091 catch_exec_command_1 (char *arg, int tempflag, int from_tty)
6093 char *cond_string = NULL;
6095 ep_skip_leading_whitespace (&arg);
6097 /* The allowed syntax is:
6099 catch exec if <cond>
6101 First, check if there's an if clause. */
6102 cond_string = ep_parse_optional_if_clause (&arg);
6104 if ((*arg != '\0') && !isspace (*arg))
6105 error ("Junk at end of arguments.");
6107 /* If this target supports it, create an exec catchpoint
6108 and enable reporting of such events. */
6109 create_exec_event_catchpoint (tempflag, cond_string);
6113 #if defined(SOLIB_ADD)
6115 catch_load_command_1 (char *arg, int tempflag, int from_tty)
6117 char *dll_pathname = NULL;
6118 char *cond_string = NULL;
6120 ep_skip_leading_whitespace (&arg);
6122 /* The allowed syntax is:
6124 catch load if <cond>
6125 catch load <filename>
6126 catch load <filename> if <cond>
6128 The user is not allowed to specify the <filename> after an
6131 We'll ignore the pathological case of a file named "if".
6133 First, check if there's an if clause. If so, then there
6134 cannot be a filename. */
6135 cond_string = ep_parse_optional_if_clause (&arg);
6137 /* If there was an if clause, then there cannot be a filename.
6138 Else, there might be a filename and an if clause. */
6139 if (cond_string == NULL)
6141 dll_pathname = ep_parse_optional_filename (&arg);
6142 ep_skip_leading_whitespace (&arg);
6143 cond_string = ep_parse_optional_if_clause (&arg);
6146 if ((*arg != '\0') && !isspace (*arg))
6147 error ("Junk at end of arguments.");
6149 /* Create a load breakpoint that only triggers when a load of
6150 the specified dll (or any dll, if no pathname was specified)
6152 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid), tempflag,
6153 dll_pathname, cond_string);
6157 catch_unload_command_1 (char *arg, int tempflag, int from_tty)
6159 char *dll_pathname = NULL;
6160 char *cond_string = NULL;
6162 ep_skip_leading_whitespace (&arg);
6164 /* The allowed syntax is:
6166 catch unload if <cond>
6167 catch unload <filename>
6168 catch unload <filename> if <cond>
6170 The user is not allowed to specify the <filename> after an
6173 We'll ignore the pathological case of a file named "if".
6175 First, check if there's an if clause. If so, then there
6176 cannot be a filename. */
6177 cond_string = ep_parse_optional_if_clause (&arg);
6179 /* If there was an if clause, then there cannot be a filename.
6180 Else, there might be a filename and an if clause. */
6181 if (cond_string == NULL)
6183 dll_pathname = ep_parse_optional_filename (&arg);
6184 ep_skip_leading_whitespace (&arg);
6185 cond_string = ep_parse_optional_if_clause (&arg);
6188 if ((*arg != '\0') && !isspace (*arg))
6189 error ("Junk at end of arguments.");
6191 /* Create an unload breakpoint that only triggers when an unload of
6192 the specified dll (or any dll, if no pathname was specified)
6194 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid), tempflag,
6195 dll_pathname, cond_string);
6197 #endif /* SOLIB_ADD */
6199 /* Commands to deal with catching exceptions. */
6201 /* Set a breakpoint at the specified callback routine for an
6202 exception event callback */
6205 create_exception_catchpoint (int tempflag, char *cond_string,
6206 enum exception_event_kind ex_event,
6207 struct symtab_and_line *sal)
6209 struct breakpoint *b;
6210 int thread = -1; /* All threads. */
6213 if (!sal) /* no exception support? */
6218 case EX_EVENT_THROW:
6219 bptype = bp_catch_throw;
6221 case EX_EVENT_CATCH:
6222 bptype = bp_catch_catch;
6224 default: /* error condition */
6225 error ("Internal error -- invalid catchpoint kind");
6228 b = set_raw_breakpoint (*sal, bptype);
6229 set_breakpoint_count (breakpoint_count + 1);
6230 b->number = breakpoint_count;
6232 b->cond_string = (cond_string == NULL) ?
6233 NULL : savestring (cond_string, strlen (cond_string));
6235 b->addr_string = NULL;
6236 b->enable = enabled;
6237 b->disposition = tempflag ? del : donttouch;
6241 /* Deal with "catch catch" and "catch throw" commands */
6244 catch_exception_command_1 (enum exception_event_kind ex_event, char *arg,
6245 int tempflag, int from_tty)
6247 char *cond_string = NULL;
6248 struct symtab_and_line *sal = NULL;
6250 ep_skip_leading_whitespace (&arg);
6252 cond_string = ep_parse_optional_if_clause (&arg);
6254 if ((*arg != '\0') && !isspace (*arg))
6255 error ("Junk at end of arguments.");
6257 if ((ex_event != EX_EVENT_THROW) &&
6258 (ex_event != EX_EVENT_CATCH))
6259 error ("Unsupported or unknown exception event; cannot catch it");
6261 /* See if we can find a callback routine */
6262 sal = target_enable_exception_callback (ex_event, 1);
6266 /* We have callbacks from the runtime system for exceptions.
6267 Set a breakpoint on the sal found, if no errors */
6268 if (sal != (struct symtab_and_line *) -1)
6269 create_exception_catchpoint (tempflag, cond_string, ex_event, sal);
6271 return; /* something went wrong with setting up callbacks */
6275 /* No callbacks from runtime system for exceptions.
6276 Try GNU C++ exception breakpoints using labels in debug info. */
6277 if (ex_event == EX_EVENT_CATCH)
6279 handle_gnu_4_16_catch_command (arg, tempflag, from_tty);
6281 else if (ex_event == EX_EVENT_THROW)
6283 /* Set a breakpoint on __raise_exception () */
6285 warning ("Unsupported with this platform/compiler combination.");
6286 warning ("Perhaps you can achieve the effect you want by setting");
6287 warning ("a breakpoint on __raise_exception().");
6292 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6293 inside a catch_errors */
6296 cover_target_enable_exception_callback (PTR arg)
6298 args_for_catchpoint_enable *args = arg;
6299 struct symtab_and_line *sal;
6300 sal = target_enable_exception_callback (args->kind, args->enable);
6303 else if (sal == (struct symtab_and_line *) -1)
6306 return 1; /*is valid */
6311 /* This is the original v.4.16 and earlier version of the
6312 catch_command_1() function. Now that other flavours of "catch"
6313 have been introduced, and since exception handling can be handled
6314 in other ways (through target ops) also, this is used only for the
6315 GNU C++ exception handling system.
6316 Note: Only the "catch" flavour of GDB 4.16 is handled here. The
6317 "catch NAME" is now no longer allowed in catch_command_1(). Also,
6318 there was no code in GDB 4.16 for "catch throw".
6320 Called from catch_exception_command_1 () */
6324 handle_gnu_4_16_catch_command (char *arg, int tempflag, int from_tty)
6326 /* First, translate ARG into something we can deal with in terms
6329 struct symtabs_and_lines sals;
6330 struct symtab_and_line sal;
6331 register struct expression *cond = 0;
6332 register struct breakpoint *b;
6336 INIT_SAL (&sal); /* initialize to zeroes */
6338 /* If no arg given, or if first arg is 'if ', all active catch clauses
6339 are breakpointed. */
6341 if (!arg || (arg[0] == 'i' && arg[1] == 'f'
6342 && (arg[2] == ' ' || arg[2] == '\t')))
6344 /* Grab all active catch clauses. */
6345 sals = get_catch_sals (0);
6349 /* Grab selected catch clauses. */
6350 error ("catch NAME not implemented");
6353 /* Not sure why this code has been disabled. I'm leaving
6354 it disabled. We can never come here now anyway
6355 since we don't allow the "catch NAME" syntax.
6358 /* This isn't used; I don't know what it was for. */
6359 sals = map_catch_names (arg, catch_breakpoint);
6367 for (i = 0; i < sals.nelts; i++)
6369 resolve_sal_pc (&sals.sals[i]);
6373 if (arg[0] == 'i' && arg[1] == 'f'
6374 && (arg[2] == ' ' || arg[2] == '\t'))
6375 cond = parse_exp_1 ((arg += 2, &arg),
6376 block_for_pc (sals.sals[i].pc), 0);
6378 error ("Junk at end of arguments.");
6383 for (i = 0; i < sals.nelts; i++)
6388 describe_other_breakpoints (sal.pc, sal.section);
6390 /* Important -- this is an ordinary breakpoint. For platforms
6391 with callback support for exceptions,
6392 create_exception_catchpoint() will create special bp types
6393 (bp_catch_catch and bp_catch_throw), and there is code in
6394 insert_breakpoints() and elsewhere that depends on that. */
6395 b = set_raw_breakpoint (sal, bp_breakpoint);
6396 set_breakpoint_count (breakpoint_count + 1);
6397 b->number = breakpoint_count;
6400 b->enable = enabled;
6401 b->disposition = tempflag ? del : donttouch;
6408 warning ("Multiple breakpoints were set.");
6409 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
6415 /* This creates a temporary internal breakpoint
6416 just to placate infrun */
6417 static struct breakpoint *
6418 create_temp_exception_breakpoint (CORE_ADDR pc)
6420 struct symtab_and_line sal;
6421 struct breakpoint *b;
6428 b = set_raw_breakpoint (sal, bp_breakpoint);
6430 b->disposition = del;
6431 b->enable = enabled;
6433 b->number = internal_breakpoint_number--;
6439 catch_command_1 (char *arg, int tempflag, int from_tty)
6442 /* The first argument may be an event name, such as "start" or "load".
6443 If so, then handle it as such. If it doesn't match an event name,
6444 then attempt to interpret it as an exception name. (This latter is
6445 the v4.16-and-earlier GDB meaning of the "catch" command.)
6447 First, try to find the bounds of what might be an event name. */
6448 char *arg1_start = arg;
6452 if (arg1_start == NULL)
6454 /* Old behaviour was to use pre-v-4.16 syntax */
6455 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6457 /* Now, this is not allowed */
6458 error ("Catch requires an event name.");
6461 arg1_end = ep_find_event_name_end (arg1_start);
6462 if (arg1_end == NULL)
6463 error ("catch requires an event");
6464 arg1_length = arg1_end + 1 - arg1_start;
6466 /* Try to match what we found against known event names. */
6467 if (strncmp (arg1_start, "signal", arg1_length) == 0)
6469 error ("Catch of signal not yet implemented");
6471 else if (strncmp (arg1_start, "catch", arg1_length) == 0)
6473 catch_exception_command_1 (EX_EVENT_CATCH, arg1_end + 1,
6474 tempflag, from_tty);
6476 else if (strncmp (arg1_start, "throw", arg1_length) == 0)
6478 catch_exception_command_1 (EX_EVENT_THROW, arg1_end + 1,
6479 tempflag, from_tty);
6481 else if (strncmp (arg1_start, "thread_start", arg1_length) == 0)
6483 error ("Catch of thread_start not yet implemented");
6485 else if (strncmp (arg1_start, "thread_exit", arg1_length) == 0)
6487 error ("Catch of thread_exit not yet implemented");
6489 else if (strncmp (arg1_start, "thread_join", arg1_length) == 0)
6491 error ("Catch of thread_join not yet implemented");
6493 else if (strncmp (arg1_start, "start", arg1_length) == 0)
6495 error ("Catch of start not yet implemented");
6497 else if (strncmp (arg1_start, "exit", arg1_length) == 0)
6499 error ("Catch of exit not yet implemented");
6501 else if (strncmp (arg1_start, "fork", arg1_length) == 0)
6503 #if defined(CHILD_INSERT_FORK_CATCHPOINT)
6504 catch_fork_command_1 (catch_fork, arg1_end + 1, tempflag, from_tty);
6506 error ("Catch of fork not yet implemented");
6509 else if (strncmp (arg1_start, "vfork", arg1_length) == 0)
6511 #if defined(CHILD_INSERT_VFORK_CATCHPOINT)
6512 catch_fork_command_1 (catch_vfork, arg1_end + 1, tempflag, from_tty);
6514 error ("Catch of vfork not yet implemented");
6517 else if (strncmp (arg1_start, "exec", arg1_length) == 0)
6519 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6520 catch_exec_command_1 (arg1_end + 1, tempflag, from_tty);
6522 error ("Catch of exec not yet implemented");
6525 else if (strncmp (arg1_start, "load", arg1_length) == 0)
6527 #if defined(SOLIB_ADD)
6528 catch_load_command_1 (arg1_end + 1, tempflag, from_tty);
6530 error ("Catch of load not implemented");
6533 else if (strncmp (arg1_start, "unload", arg1_length) == 0)
6535 #if defined(SOLIB_ADD)
6536 catch_unload_command_1 (arg1_end + 1, tempflag, from_tty);
6538 error ("Catch of load not implemented");
6541 else if (strncmp (arg1_start, "stop", arg1_length) == 0)
6543 error ("Catch of stop not yet implemented");
6546 /* This doesn't appear to be an event name */
6550 /* Pre-v.4.16 behaviour was to treat the argument
6551 as the name of an exception */
6552 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6553 /* Now this is not allowed */
6554 error ("Unknown event kind specified for catch");
6559 /* Used by the gui, could be made a worker for other things. */
6562 set_breakpoint_sal (struct symtab_and_line sal)
6564 struct breakpoint *b;
6565 b = set_raw_breakpoint (sal, bp_breakpoint);
6566 set_breakpoint_count (breakpoint_count + 1);
6567 b->number = breakpoint_count;
6574 /* These aren't used; I don't know what they were for. */
6575 /* Disable breakpoints on all catch clauses described in ARGS. */
6577 disable_catch (char *args)
6579 /* Map the disable command to catch clauses described in ARGS. */
6582 /* Enable breakpoints on all catch clauses described in ARGS. */
6584 enable_catch (char *args)
6586 /* Map the disable command to catch clauses described in ARGS. */
6589 /* Delete breakpoints on all catch clauses in the active scope. */
6591 delete_catch (char *args)
6593 /* Map the delete command to catch clauses described in ARGS. */
6598 catch_command (char *arg, int from_tty)
6600 catch_command_1 (arg, 0, from_tty);
6605 tcatch_command (char *arg, int from_tty)
6607 catch_command_1 (arg, 1, from_tty);
6612 clear_command (char *arg, int from_tty)
6614 register struct breakpoint *b, *b1;
6616 struct symtabs_and_lines sals;
6617 struct symtab_and_line sal;
6618 register struct breakpoint *found;
6623 sals = decode_line_spec (arg, 1);
6628 sals.sals = (struct symtab_and_line *)
6629 xmalloc (sizeof (struct symtab_and_line));
6630 INIT_SAL (&sal); /* initialize to zeroes */
6631 sal.line = default_breakpoint_line;
6632 sal.symtab = default_breakpoint_symtab;
6633 sal.pc = default_breakpoint_address;
6634 if (sal.symtab == 0)
6635 error ("No source file specified.");
6643 /* For each line spec given, delete bps which correspond
6644 to it. We do this in two loops: the first loop looks at
6645 the initial bp(s) in the chain which should be deleted,
6646 the second goes down the rest of the chain looking ahead
6647 one so it can take those bps off the chain without messing
6651 for (i = 0; i < sals.nelts; i++)
6653 /* If exact pc given, clear bpts at that pc.
6654 If line given (pc == 0), clear all bpts on specified line.
6655 If defaulting, clear all bpts on default line
6658 defaulting sal.pc != 0 tests to do
6663 1 0 <can't happen> */
6666 found = (struct breakpoint *) 0;
6669 while (breakpoint_chain
6670 /* Why don't we check here that this is not
6671 a watchpoint, etc., as we do below?
6672 I can't make it fail, but don't know
6673 what's stopping the failure: a watchpoint
6674 of the same address as "sal.pc" should
6675 wind up being deleted. */
6677 && (((sal.pc && (breakpoint_chain->address == sal.pc)) &&
6678 (overlay_debugging == 0 ||
6679 breakpoint_chain->section == sal.section))
6680 || ((default_match || (0 == sal.pc))
6681 && breakpoint_chain->source_file != NULL
6682 && sal.symtab != NULL
6683 && STREQ (breakpoint_chain->source_file, sal.symtab->filename)
6684 && breakpoint_chain->line_number == sal.line)))
6687 b1 = breakpoint_chain;
6688 breakpoint_chain = b1->next;
6696 && b->next->type != bp_none
6697 && b->next->type != bp_watchpoint
6698 && b->next->type != bp_hardware_watchpoint
6699 && b->next->type != bp_read_watchpoint
6700 && b->next->type != bp_access_watchpoint
6701 && (((sal.pc && (b->next->address == sal.pc)) &&
6702 (overlay_debugging == 0 ||
6703 b->next->section == sal.section))
6704 || ((default_match || (0 == sal.pc))
6705 && b->next->source_file != NULL
6706 && sal.symtab != NULL
6707 && STREQ (b->next->source_file, sal.symtab->filename)
6708 && b->next->line_number == sal.line)))
6721 error ("No breakpoint at %s.", arg);
6723 error ("No breakpoint at this line.");
6727 from_tty = 1; /* Always report if deleted more than one */
6729 printf_unfiltered ("Deleted breakpoint%s ", found->next ? "s" : "");
6730 breakpoints_changed ();
6734 printf_unfiltered ("%d ", found->number);
6736 delete_breakpoint (found);
6740 putchar_unfiltered ('\n');
6745 /* Delete breakpoint in BS if they are `delete' breakpoints and
6746 all breakpoints that are marked for deletion, whether hit or not.
6747 This is called after any breakpoint is hit, or after errors. */
6750 breakpoint_auto_delete (bpstat bs)
6752 struct breakpoint *b, *temp;
6754 for (; bs; bs = bs->next)
6755 if (bs->breakpoint_at && bs->breakpoint_at->disposition == del
6757 delete_breakpoint (bs->breakpoint_at);
6759 ALL_BREAKPOINTS_SAFE (b, temp)
6761 if (b->disposition == del_at_next_stop)
6762 delete_breakpoint (b);
6766 /* Delete a breakpoint and clean up all traces of it in the data
6770 delete_breakpoint (struct breakpoint *bpt)
6772 register struct breakpoint *b;
6776 error ("Internal error (attempted to delete a NULL breakpoint)");
6779 /* Has this bp already been deleted? This can happen because multiple
6780 lists can hold pointers to bp's. bpstat lists are especial culprits.
6782 One example of this happening is a watchpoint's scope bp. When the
6783 scope bp triggers, we notice that the watchpoint is out of scope, and
6784 delete it. We also delete its scope bp. But the scope bp is marked
6785 "auto-deleting", and is already on a bpstat. That bpstat is then
6786 checked for auto-deleting bp's, which are deleted.
6788 A real solution to this problem might involve reference counts in bp's,
6789 and/or giving them pointers back to their referencing bpstat's, and
6790 teaching delete_breakpoint to only free a bp's storage when no more
6791 references were extent. A cheaper bandaid was chosen. */
6792 if (bpt->type == bp_none)
6795 if (delete_breakpoint_hook)
6796 delete_breakpoint_hook (bpt);
6797 breakpoint_delete_event (bpt->number);
6800 remove_breakpoint (bpt, mark_inserted);
6802 if (breakpoint_chain == bpt)
6803 breakpoint_chain = bpt->next;
6805 /* If we have callback-style exception catchpoints, don't go through
6806 the adjustments to the C++ runtime library etc. if the inferior
6807 isn't actually running. target_enable_exception_callback for a
6808 null target ops vector gives an undesirable error message, so we
6809 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6810 exceptions are supported in this way, it's OK for now. FIXME */
6811 if (ep_is_exception_catchpoint (bpt) && target_has_execution)
6813 static char message1[] = "Error in deleting catchpoint %d:\n";
6814 static char message[sizeof (message1) + 30];
6815 args_for_catchpoint_enable args;
6817 /* Format possible error msg */
6818 sprintf (message, message1, bpt->number);
6819 args.kind = bpt->type == bp_catch_catch ?
6820 EX_EVENT_CATCH : EX_EVENT_THROW;
6822 catch_errors (cover_target_enable_exception_callback, &args,
6823 message, RETURN_MASK_ALL);
6830 b->next = bpt->next;
6834 /* Before turning off the visuals for the bp, check to see that
6835 there are no other bps at the same address. */
6842 clearIt = (b->address != bpt->address);
6849 TUIDO (((TuiOpaqueFuncPtr) tui_vAllSetHasBreakAt, bpt, 0));
6850 TUIDO (((TuiOpaqueFuncPtr) tuiUpdateAllExecInfos));
6854 check_duplicates (bpt);
6855 /* If this breakpoint was inserted, and there is another breakpoint
6856 at the same address, we need to insert the other breakpoint. */
6858 && bpt->type != bp_hardware_watchpoint
6859 && bpt->type != bp_read_watchpoint
6860 && bpt->type != bp_access_watchpoint
6861 && bpt->type != bp_catch_fork
6862 && bpt->type != bp_catch_vfork
6863 && bpt->type != bp_catch_exec)
6866 if (b->address == bpt->address
6867 && b->section == bpt->section
6869 && b->enable != disabled
6870 && b->enable != shlib_disabled
6871 && b->enable != call_disabled)
6875 /* We should never reach this point if there is a permanent
6876 breakpoint at the same address as the one being deleted.
6877 If there is a permanent breakpoint somewhere, it should
6878 always be the only one inserted. */
6879 if (b->enable == permanent)
6880 internal_error (__FILE__, __LINE__,
6881 "another breakpoint was inserted on top of "
6882 "a permanent breakpoint");
6884 if (b->type == bp_hardware_breakpoint)
6885 val = target_insert_hw_breakpoint (b->address, b->shadow_contents);
6887 val = target_insert_breakpoint (b->address, b->shadow_contents);
6891 target_terminal_ours_for_output ();
6892 warning ("Cannot insert breakpoint %d:", b->number);
6893 memory_error (val, b->address); /* which bombs us out */
6900 free_command_lines (&bpt->commands);
6903 if (bpt->cond_string != NULL)
6904 xfree (bpt->cond_string);
6905 if (bpt->addr_string != NULL)
6906 xfree (bpt->addr_string);
6907 if (bpt->exp != NULL)
6909 if (bpt->exp_string != NULL)
6910 xfree (bpt->exp_string);
6911 if (bpt->val != NULL)
6912 value_free (bpt->val);
6913 if (bpt->source_file != NULL)
6914 xfree (bpt->source_file);
6915 if (bpt->dll_pathname != NULL)
6916 xfree (bpt->dll_pathname);
6917 if (bpt->triggered_dll_pathname != NULL)
6918 xfree (bpt->triggered_dll_pathname);
6919 if (bpt->exec_pathname != NULL)
6920 xfree (bpt->exec_pathname);
6922 /* Be sure no bpstat's are pointing at it after it's been freed. */
6923 /* FIXME, how can we find all bpstat's?
6924 We just check stop_bpstat for now. */
6925 for (bs = stop_bpstat; bs; bs = bs->next)
6926 if (bs->breakpoint_at == bpt)
6928 bs->breakpoint_at = NULL;
6930 /* we'd call bpstat_clear_actions, but that free's stuff and due
6931 to the multiple pointers pointing to one item with no
6932 reference counts found anywhere through out the bpstat's (how
6933 do you spell fragile?), we don't want to free things twice --
6934 better a memory leak than a corrupt malloc pool! */
6935 bs->commands = NULL;
6938 /* On the chance that someone will soon try again to delete this same
6939 bp, we mark it as deleted before freeing its storage. */
6940 bpt->type = bp_none;
6946 do_delete_breakpoint_cleanup (void *b)
6948 delete_breakpoint (b);
6952 make_cleanup_delete_breakpoint (struct breakpoint *b)
6954 return make_cleanup (do_delete_breakpoint_cleanup, b);
6958 make_exec_cleanup_delete_breakpoint (struct breakpoint *b)
6960 return make_exec_cleanup (do_delete_breakpoint_cleanup, b);
6964 delete_command (char *arg, int from_tty)
6966 struct breakpoint *b, *temp;
6970 int breaks_to_delete = 0;
6972 /* Delete all breakpoints if no argument.
6973 Do not delete internal or call-dummy breakpoints, these
6974 have to be deleted with an explicit breakpoint number argument. */
6977 if (b->type != bp_call_dummy &&
6978 b->type != bp_shlib_event &&
6979 b->type != bp_thread_event &&
6981 breaks_to_delete = 1;
6984 /* Ask user only if there are some breakpoints to delete. */
6986 || (breaks_to_delete && query ("Delete all breakpoints? ")))
6988 ALL_BREAKPOINTS_SAFE (b, temp)
6990 if (b->type != bp_call_dummy &&
6991 b->type != bp_shlib_event &&
6992 b->type != bp_thread_event &&
6994 delete_breakpoint (b);
6999 map_breakpoint_numbers (arg, delete_breakpoint);
7002 /* Reset a breakpoint given it's struct breakpoint * BINT.
7003 The value we return ends up being the return value from catch_errors.
7004 Unused in this case. */
7007 breakpoint_re_set_one (PTR bint)
7009 /* get past catch_errs */
7010 struct breakpoint *b = (struct breakpoint *) bint;
7013 struct symtabs_and_lines sals;
7015 enum enable save_enable;
7020 warning ("attempted to reset apparently deleted breakpoint #%d?",
7024 case bp_hardware_breakpoint:
7026 case bp_catch_unload:
7027 if (b->addr_string == NULL)
7029 /* Anything without a string can't be re-set. */
7030 delete_breakpoint (b);
7033 /* In case we have a problem, disable this breakpoint. We'll restore
7034 its status if we succeed. */
7035 save_enable = b->enable;
7036 b->enable = disabled;
7038 set_language (b->language);
7039 input_radix = b->input_radix;
7041 sals = decode_line_1 (&s, 1, (struct symtab *) NULL, 0, (char ***) NULL);
7042 for (i = 0; i < sals.nelts; i++)
7044 resolve_sal_pc (&sals.sals[i]);
7046 /* Reparse conditions, they might contain references to the
7048 if (b->cond_string != NULL)
7053 b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0);
7056 /* We need to re-set the breakpoint if the address changes... */
7057 if (b->address != sals.sals[i].pc
7058 /* ...or new and old breakpoints both have source files, and
7059 the source file name or the line number changes... */
7060 || (b->source_file != NULL
7061 && sals.sals[i].symtab != NULL
7062 && (!STREQ (b->source_file, sals.sals[i].symtab->filename)
7063 || b->line_number != sals.sals[i].line)
7065 /* ...or we switch between having a source file and not having
7067 || ((b->source_file == NULL) != (sals.sals[i].symtab == NULL))
7070 if (b->source_file != NULL)
7071 xfree (b->source_file);
7072 if (sals.sals[i].symtab == NULL)
7073 b->source_file = NULL;
7076 savestring (sals.sals[i].symtab->filename,
7077 strlen (sals.sals[i].symtab->filename));
7078 b->line_number = sals.sals[i].line;
7079 b->address = sals.sals[i].pc;
7081 /* Used to check for duplicates here, but that can
7082 cause trouble, as it doesn't check for disable
7087 /* Might be better to do this just once per breakpoint_re_set,
7088 rather than once for every breakpoint. */
7089 breakpoints_changed ();
7091 b->section = sals.sals[i].section;
7092 b->enable = save_enable; /* Restore it, this worked. */
7095 /* Now that this is re-enabled, check_duplicates
7097 check_duplicates (b);
7104 case bp_hardware_watchpoint:
7105 case bp_read_watchpoint:
7106 case bp_access_watchpoint:
7107 innermost_block = NULL;
7108 /* The issue arises of what context to evaluate this in. The
7109 same one as when it was set, but what does that mean when
7110 symbols have been re-read? We could save the filename and
7111 functionname, but if the context is more local than that, the
7112 best we could do would be something like how many levels deep
7113 and which index at that particular level, but that's going to
7114 be less stable than filenames or function names. */
7116 /* So for now, just use a global context. */
7119 b->exp = parse_expression (b->exp_string);
7120 b->exp_valid_block = innermost_block;
7121 mark = value_mark ();
7123 value_free (b->val);
7124 b->val = evaluate_expression (b->exp);
7125 release_value (b->val);
7126 if (VALUE_LAZY (b->val))
7127 value_fetch_lazy (b->val);
7129 if (b->cond_string != NULL)
7134 b->cond = parse_exp_1 (&s, (struct block *) 0, 0);
7136 if (b->enable == enabled)
7138 value_free_to_mark (mark);
7140 case bp_catch_catch:
7141 case bp_catch_throw:
7143 /* We needn't really do anything to reset these, since the mask
7144 that requests them is unaffected by e.g., new libraries being
7147 case bp_catch_vfork:
7152 printf_filtered ("Deleting unknown breakpoint type %d\n", b->type);
7154 /* Delete longjmp breakpoints, they will be reset later by
7155 breakpoint_re_set. */
7157 case bp_longjmp_resume:
7158 delete_breakpoint (b);
7161 /* This breakpoint is special, it's set up when the inferior
7162 starts and we really don't want to touch it. */
7163 case bp_shlib_event:
7165 /* Like bp_shlib_event, this breakpoint type is special.
7166 Once it is set up, we do not want to touch it. */
7167 case bp_thread_event:
7169 /* Keep temporary breakpoints, which can be encountered when we step
7170 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7171 Otherwise these should have been blown away via the cleanup chain
7172 or by breakpoint_init_inferior when we rerun the executable. */
7175 case bp_watchpoint_scope:
7177 case bp_step_resume:
7184 /* Re-set all breakpoints after symbols have been re-loaded. */
7186 breakpoint_re_set (void)
7188 struct breakpoint *b, *temp;
7189 enum language save_language;
7190 int save_input_radix;
7191 static char message1[] = "Error in re-setting breakpoint %d:\n";
7192 char message[sizeof (message1) + 30 /* slop */ ];
7194 save_language = current_language->la_language;
7195 save_input_radix = input_radix;
7196 ALL_BREAKPOINTS_SAFE (b, temp)
7198 /* Format possible error msg */
7199 sprintf (message, message1, b->number);
7200 catch_errors (breakpoint_re_set_one, b, message, RETURN_MASK_ALL);
7202 set_language (save_language);
7203 input_radix = save_input_radix;
7205 #ifdef GET_LONGJMP_TARGET
7206 create_longjmp_breakpoint ("longjmp");
7207 create_longjmp_breakpoint ("_longjmp");
7208 create_longjmp_breakpoint ("siglongjmp");
7209 create_longjmp_breakpoint ("_siglongjmp");
7210 create_longjmp_breakpoint (NULL);
7214 /* Took this out (temporarily at least), since it produces an extra
7215 blank line at startup. This messes up the gdbtests. -PB */
7216 /* Blank line to finish off all those mention() messages we just printed. */
7217 printf_filtered ("\n");
7221 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7222 If from_tty is nonzero, it prints a message to that effect,
7223 which ends with a period (no newline). */
7225 /* Reset the thread number of this breakpoint:
7227 - If the breakpoint is for all threads, leave it as-is.
7228 - Else, reset it to the current thread for inferior_ptid. */
7230 breakpoint_re_set_thread (struct breakpoint *b)
7232 if (b->thread != -1)
7234 if (in_thread_list (inferior_ptid))
7235 b->thread = pid_to_thread_id (inferior_ptid);
7240 set_ignore_count (int bptnum, int count, int from_tty)
7242 register struct breakpoint *b;
7248 if (b->number == bptnum)
7250 b->ignore_count = count;
7253 else if (count == 0)
7254 printf_filtered ("Will stop next time breakpoint %d is reached.",
7256 else if (count == 1)
7257 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7260 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7262 breakpoints_changed ();
7266 error ("No breakpoint number %d.", bptnum);
7269 /* Clear the ignore counts of all breakpoints. */
7271 breakpoint_clear_ignore_counts (void)
7273 struct breakpoint *b;
7276 b->ignore_count = 0;
7279 /* Command to set ignore-count of breakpoint N to COUNT. */
7282 ignore_command (char *args, int from_tty)
7288 error_no_arg ("a breakpoint number");
7290 num = get_number (&p);
7292 error ("bad breakpoint number: '%s'", args);
7294 error ("Second argument (specified ignore-count) is missing.");
7296 set_ignore_count (num,
7297 longest_to_int (value_as_long (parse_and_eval (p))),
7299 printf_filtered ("\n");
7300 breakpoints_changed ();
7303 /* Call FUNCTION on each of the breakpoints
7304 whose numbers are given in ARGS. */
7307 map_breakpoint_numbers (char *args, void (*function) (struct breakpoint *))
7309 register char *p = args;
7312 register struct breakpoint *b, *tmp;
7316 error_no_arg ("one or more breakpoint numbers");
7323 num = get_number_or_range (&p1);
7326 warning ("bad breakpoint number at or near '%s'", p);
7330 ALL_BREAKPOINTS_SAFE (b, tmp)
7331 if (b->number == num)
7333 struct breakpoint *related_breakpoint = b->related_breakpoint;
7336 if (related_breakpoint)
7337 function (related_breakpoint);
7341 printf_unfiltered ("No breakpoint number %d.\n", num);
7348 disable_breakpoint (struct breakpoint *bpt)
7350 /* Never disable a watchpoint scope breakpoint; we want to
7351 hit them when we leave scope so we can delete both the
7352 watchpoint and its scope breakpoint at that time. */
7353 if (bpt->type == bp_watchpoint_scope)
7356 /* You can't disable permanent breakpoints. */
7357 if (bpt->enable == permanent)
7360 bpt->enable = disabled;
7362 check_duplicates (bpt);
7364 if (modify_breakpoint_hook)
7365 modify_breakpoint_hook (bpt);
7366 breakpoint_modify_event (bpt->number);
7371 disable_command (char *args, int from_tty)
7373 register struct breakpoint *bpt;
7375 ALL_BREAKPOINTS (bpt)
7379 warning ("attempted to disable apparently deleted breakpoint #%d?",
7384 case bp_catch_unload:
7386 case bp_catch_vfork:
7388 case bp_catch_catch:
7389 case bp_catch_throw:
7390 case bp_hardware_breakpoint:
7392 case bp_hardware_watchpoint:
7393 case bp_read_watchpoint:
7394 case bp_access_watchpoint:
7395 disable_breakpoint (bpt);
7400 map_breakpoint_numbers (args, disable_breakpoint);
7404 do_enable_breakpoint (struct breakpoint *bpt, enum bpdisp disposition)
7406 struct frame_info *save_selected_frame = NULL;
7407 int save_selected_frame_level = -1;
7408 int target_resources_ok, other_type_used;
7411 if (bpt->type == bp_hardware_breakpoint)
7414 i = hw_breakpoint_used_count ();
7415 target_resources_ok =
7416 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint,
7418 if (target_resources_ok == 0)
7419 error ("No hardware breakpoint support in the target.");
7420 else if (target_resources_ok < 0)
7421 error ("Hardware breakpoints used exceeds limit.");
7424 if (bpt->enable != permanent)
7425 bpt->enable = enabled;
7426 bpt->disposition = disposition;
7427 check_duplicates (bpt);
7428 breakpoints_changed ();
7430 if (bpt->type == bp_watchpoint ||
7431 bpt->type == bp_hardware_watchpoint ||
7432 bpt->type == bp_read_watchpoint ||
7433 bpt->type == bp_access_watchpoint)
7435 if (bpt->exp_valid_block != NULL)
7437 struct frame_info *fr =
7439 /* Ensure that we have the current frame. Else, this
7440 next query may pessimistically be answered as, "No,
7441 not within current scope". */
7442 get_current_frame ();
7443 fr = find_frame_addr_in_frame_chain (bpt->watchpoint_frame);
7447 Cannot enable watchpoint %d because the block in which its expression\n\
7448 is valid is not currently in scope.\n", bpt->number);
7449 bpt->enable = disabled;
7453 save_selected_frame = selected_frame;
7454 save_selected_frame_level = selected_frame_level;
7455 select_frame (fr, -1);
7458 value_free (bpt->val);
7459 mark = value_mark ();
7460 bpt->val = evaluate_expression (bpt->exp);
7461 release_value (bpt->val);
7462 if (VALUE_LAZY (bpt->val))
7463 value_fetch_lazy (bpt->val);
7465 if (bpt->type == bp_hardware_watchpoint ||
7466 bpt->type == bp_read_watchpoint ||
7467 bpt->type == bp_access_watchpoint)
7469 int i = hw_watchpoint_used_count (bpt->type, &other_type_used);
7470 int mem_cnt = can_use_hardware_watchpoint (bpt->val);
7472 /* Hack around 'unused var' error for some targets here */
7474 target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7475 bpt->type, i + mem_cnt, other_type_used);
7476 /* we can consider of type is bp_hardware_watchpoint, convert to
7477 bp_watchpoint in the following condition */
7478 if (target_resources_ok < 0)
7481 Cannot enable watchpoint %d because target watch resources\n\
7482 have been allocated for other watchpoints.\n", bpt->number);
7483 bpt->enable = disabled;
7484 value_free_to_mark (mark);
7489 if (save_selected_frame_level >= 0)
7490 select_frame (save_selected_frame, save_selected_frame_level);
7491 value_free_to_mark (mark);
7493 if (modify_breakpoint_hook)
7494 modify_breakpoint_hook (bpt);
7495 breakpoint_modify_event (bpt->number);
7499 enable_breakpoint (struct breakpoint *bpt)
7501 do_enable_breakpoint (bpt, bpt->disposition);
7504 /* The enable command enables the specified breakpoints (or all defined
7505 breakpoints) so they once again become (or continue to be) effective
7506 in stopping the inferior. */
7510 enable_command (char *args, int from_tty)
7512 register struct breakpoint *bpt;
7514 ALL_BREAKPOINTS (bpt)
7518 warning ("attempted to enable apparently deleted breakpoint #%d?",
7523 case bp_catch_unload:
7525 case bp_catch_vfork:
7527 case bp_catch_catch:
7528 case bp_catch_throw:
7529 case bp_hardware_breakpoint:
7531 case bp_hardware_watchpoint:
7532 case bp_read_watchpoint:
7533 case bp_access_watchpoint:
7534 enable_breakpoint (bpt);
7539 map_breakpoint_numbers (args, enable_breakpoint);
7543 enable_once_breakpoint (struct breakpoint *bpt)
7545 do_enable_breakpoint (bpt, disable);
7550 enable_once_command (char *args, int from_tty)
7552 map_breakpoint_numbers (args, enable_once_breakpoint);
7556 enable_delete_breakpoint (struct breakpoint *bpt)
7558 do_enable_breakpoint (bpt, del);
7563 enable_delete_command (char *args, int from_tty)
7565 map_breakpoint_numbers (args, enable_delete_breakpoint);
7568 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7570 struct symtabs_and_lines
7571 decode_line_spec_1 (char *string, int funfirstline)
7573 struct symtabs_and_lines sals;
7575 error ("Empty line specification.");
7576 if (default_breakpoint_valid)
7577 sals = decode_line_1 (&string, funfirstline,
7578 default_breakpoint_symtab,
7579 default_breakpoint_line,
7582 sals = decode_line_1 (&string, funfirstline,
7583 (struct symtab *) NULL, 0, (char ***) NULL);
7585 error ("Junk at end of line specification: %s", string);
7590 _initialize_breakpoint (void)
7592 struct cmd_list_element *c;
7594 breakpoint_chain = 0;
7595 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7596 before a breakpoint is set. */
7597 breakpoint_count = 0;
7599 add_com ("ignore", class_breakpoint, ignore_command,
7600 "Set ignore-count of breakpoint number N to COUNT.\n\
7601 Usage is `ignore N COUNT'.");
7603 add_com_alias ("bc", "ignore", class_breakpoint, 1);
7605 add_com ("commands", class_breakpoint, commands_command,
7606 "Set commands to be executed when a breakpoint is hit.\n\
7607 Give breakpoint number as argument after \"commands\".\n\
7608 With no argument, the targeted breakpoint is the last one set.\n\
7609 The commands themselves follow starting on the next line.\n\
7610 Type a line containing \"end\" to indicate the end of them.\n\
7611 Give \"silent\" as the first line to make the breakpoint silent;\n\
7612 then no output is printed when it is hit, except what the commands print.");
7614 add_com ("condition", class_breakpoint, condition_command,
7615 "Specify breakpoint number N to break only if COND is true.\n\
7616 Usage is `condition N COND', where N is an integer and COND is an\n\
7617 expression to be evaluated whenever breakpoint N is reached. ");
7619 c = add_com ("tbreak", class_breakpoint, tbreak_command,
7620 "Set a temporary breakpoint. Args like \"break\" command.\n\
7621 Like \"break\" except the breakpoint is only temporary,\n\
7622 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7623 by using \"enable delete\" on the breakpoint number.");
7624 c->completer = location_completer;
7626 c = add_com ("txbreak", class_breakpoint, tbreak_at_finish_command,
7627 "Set temporary breakpoint at procedure exit. Either there should\n\
7628 be no argument or the argument must be a depth.\n");
7629 c->completer = location_completer;
7631 c = add_com ("hbreak", class_breakpoint, hbreak_command,
7632 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7633 Like \"break\" except the breakpoint requires hardware support,\n\
7634 some target hardware may not have this support.");
7635 c->completer = location_completer;
7637 c = add_com ("thbreak", class_breakpoint, thbreak_command,
7638 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7639 Like \"hbreak\" except the breakpoint is only temporary,\n\
7640 so it will be deleted when hit.");
7641 c->completer = location_completer;
7643 add_prefix_cmd ("enable", class_breakpoint, enable_command,
7644 "Enable some breakpoints.\n\
7645 Give breakpoint numbers (separated by spaces) as arguments.\n\
7646 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7647 This is used to cancel the effect of the \"disable\" command.\n\
7648 With a subcommand you can enable temporarily.",
7649 &enablelist, "enable ", 1, &cmdlist);
7651 add_com ("ab", class_breakpoint, enable_command,
7652 "Enable some breakpoints.\n\
7653 Give breakpoint numbers (separated by spaces) as arguments.\n\
7654 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7655 This is used to cancel the effect of the \"disable\" command.\n\
7656 With a subcommand you can enable temporarily.");
7658 add_com_alias ("en", "enable", class_breakpoint, 1);
7660 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command,
7661 "Enable some breakpoints.\n\
7662 Give breakpoint numbers (separated by spaces) as arguments.\n\
7663 This is used to cancel the effect of the \"disable\" command.\n\
7664 May be abbreviated to simply \"enable\".\n",
7665 &enablebreaklist, "enable breakpoints ", 1, &enablelist);
7667 add_cmd ("once", no_class, enable_once_command,
7668 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7669 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7672 add_cmd ("delete", no_class, enable_delete_command,
7673 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7674 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7677 add_cmd ("delete", no_class, enable_delete_command,
7678 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7679 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7682 add_cmd ("once", no_class, enable_once_command,
7683 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7684 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7687 add_prefix_cmd ("disable", class_breakpoint, disable_command,
7688 "Disable some breakpoints.\n\
7689 Arguments are breakpoint numbers with spaces in between.\n\
7690 To disable all breakpoints, give no argument.\n\
7691 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7692 &disablelist, "disable ", 1, &cmdlist);
7693 add_com_alias ("dis", "disable", class_breakpoint, 1);
7694 add_com_alias ("disa", "disable", class_breakpoint, 1);
7696 add_com ("sb", class_breakpoint, disable_command,
7697 "Disable some breakpoints.\n\
7698 Arguments are breakpoint numbers with spaces in between.\n\
7699 To disable all breakpoints, give no argument.\n\
7700 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7702 add_cmd ("breakpoints", class_alias, disable_command,
7703 "Disable some breakpoints.\n\
7704 Arguments are breakpoint numbers with spaces in between.\n\
7705 To disable all breakpoints, give no argument.\n\
7706 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7707 This command may be abbreviated \"disable\".",
7710 add_prefix_cmd ("delete", class_breakpoint, delete_command,
7711 "Delete some breakpoints or auto-display expressions.\n\
7712 Arguments are breakpoint numbers with spaces in between.\n\
7713 To delete all breakpoints, give no argument.\n\
7715 Also a prefix command for deletion of other GDB objects.\n\
7716 The \"unset\" command is also an alias for \"delete\".",
7717 &deletelist, "delete ", 1, &cmdlist);
7718 add_com_alias ("d", "delete", class_breakpoint, 1);
7720 add_com ("db", class_breakpoint, delete_command,
7721 "Delete some breakpoints.\n\
7722 Arguments are breakpoint numbers with spaces in between.\n\
7723 To delete all breakpoints, give no argument.\n");
7725 add_cmd ("breakpoints", class_alias, delete_command,
7726 "Delete some breakpoints or auto-display expressions.\n\
7727 Arguments are breakpoint numbers with spaces in between.\n\
7728 To delete all breakpoints, give no argument.\n\
7729 This command may be abbreviated \"delete\".",
7732 add_com ("clear", class_breakpoint, clear_command,
7733 concat ("Clear breakpoint at specified line or function.\n\
7734 Argument may be line number, function name, or \"*\" and an address.\n\
7735 If line number is specified, all breakpoints in that line are cleared.\n\
7736 If function is specified, breakpoints at beginning of function are cleared.\n\
7737 If an address is specified, breakpoints at that address are cleared.\n\n",
7738 "With no argument, clears all breakpoints in the line that the selected frame\n\
7741 See also the \"delete\" command which clears breakpoints by number.", NULL));
7743 c = add_com ("break", class_breakpoint, break_command,
7744 concat ("Set breakpoint at specified line or function.\n\
7745 Argument may be line number, function name, or \"*\" and an address.\n\
7746 If line number is specified, break at start of code for that line.\n\
7747 If function is specified, break at start of code for that function.\n\
7748 If an address is specified, break at that exact address.\n",
7749 "With no arg, uses current execution address of selected stack frame.\n\
7750 This is useful for breaking on return to a stack frame.\n\
7752 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7754 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL));
7755 c->completer = location_completer;
7757 add_com_alias ("b", "break", class_run, 1);
7758 add_com_alias ("br", "break", class_run, 1);
7759 add_com_alias ("bre", "break", class_run, 1);
7760 add_com_alias ("brea", "break", class_run, 1);
7762 add_com ("xbreak", class_breakpoint, break_at_finish_command,
7763 concat ("Set breakpoint at procedure exit. \n\
7764 Argument may be function name, or \"*\" and an address.\n\
7765 If function is specified, break at end of code for that function.\n\
7766 If an address is specified, break at the end of the function that contains \n\
7767 that exact address.\n",
7768 "With no arg, uses current execution address of selected stack frame.\n\
7769 This is useful for breaking on return to a stack frame.\n\
7771 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7773 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL));
7774 add_com_alias ("xb", "xbreak", class_breakpoint, 1);
7775 add_com_alias ("xbr", "xbreak", class_breakpoint, 1);
7776 add_com_alias ("xbre", "xbreak", class_breakpoint, 1);
7777 add_com_alias ("xbrea", "xbreak", class_breakpoint, 1);
7781 add_com_alias ("ba", "break", class_breakpoint, 1);
7782 add_com_alias ("bu", "ubreak", class_breakpoint, 1);
7783 add_com ("bx", class_breakpoint, break_at_finish_at_depth_command,
7784 "Set breakpoint at procedure exit. Either there should\n\
7785 be no argument or the argument must be a depth.\n");
7790 add_abbrev_prefix_cmd ("stop", class_breakpoint, stop_command,
7791 "Break in function/address or break at a line in the current file.",
7792 &stoplist, "stop ", 1, &cmdlist);
7793 add_cmd ("in", class_breakpoint, stopin_command,
7794 "Break in function or address.\n", &stoplist);
7795 add_cmd ("at", class_breakpoint, stopat_command,
7796 "Break at a line in the current file.\n", &stoplist);
7797 add_com ("status", class_info, breakpoints_info,
7798 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7799 The \"Type\" column indicates one of:\n\
7800 \tbreakpoint - normal breakpoint\n\
7801 \twatchpoint - watchpoint\n\
7802 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7803 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7804 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7805 address and file/line number respectively.\n\n",
7806 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7807 are set to the address of the last breakpoint listed.\n\n\
7808 Convenience variable \"$bpnum\" contains the number of the last\n\
7809 breakpoint set.", NULL));
7812 add_info ("breakpoints", breakpoints_info,
7813 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7814 The \"Type\" column indicates one of:\n\
7815 \tbreakpoint - normal breakpoint\n\
7816 \twatchpoint - watchpoint\n\
7817 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7818 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7819 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7820 address and file/line number respectively.\n\n",
7821 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7822 are set to the address of the last breakpoint listed.\n\n\
7823 Convenience variable \"$bpnum\" contains the number of the last\n\
7824 breakpoint set.", NULL));
7827 add_com ("lb", class_breakpoint, breakpoints_info,
7828 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7829 The \"Type\" column indicates one of:\n\
7830 \tbreakpoint - normal breakpoint\n\
7831 \twatchpoint - watchpoint\n\
7832 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7833 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7834 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7835 address and file/line number respectively.\n\n",
7836 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7837 are set to the address of the last breakpoint listed.\n\n\
7838 Convenience variable \"$bpnum\" contains the number of the last\n\
7839 breakpoint set.", NULL));
7841 add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints,
7842 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7843 The \"Type\" column indicates one of:\n\
7844 \tbreakpoint - normal breakpoint\n\
7845 \twatchpoint - watchpoint\n\
7846 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7847 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7848 \tuntil - internal breakpoint used by the \"until\" command\n\
7849 \tfinish - internal breakpoint used by the \"finish\" command\n",
7850 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7851 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7852 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7853 address and file/line number respectively.\n\n",
7854 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7855 are set to the address of the last breakpoint listed.\n\n\
7856 Convenience variable \"$bpnum\" contains the number of the last\n\
7857 breakpoint set.", NULL),
7858 &maintenanceinfolist);
7860 add_com ("catch", class_breakpoint, catch_command,
7861 "Set catchpoints to catch events.\n\
7862 Raised signals may be caught:\n\
7863 \tcatch signal - all signals\n\
7864 \tcatch signal <signame> - a particular signal\n\
7865 Raised exceptions may be caught:\n\
7866 \tcatch throw - all exceptions, when thrown\n\
7867 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7868 \tcatch catch - all exceptions, when caught\n\
7869 \tcatch catch <exceptname> - a particular exception, when caught\n\
7870 Thread or process events may be caught:\n\
7871 \tcatch thread_start - any threads, just after creation\n\
7872 \tcatch thread_exit - any threads, just before expiration\n\
7873 \tcatch thread_join - any threads, just after joins\n\
7874 Process events may be caught:\n\
7875 \tcatch start - any processes, just after creation\n\
7876 \tcatch exit - any processes, just before expiration\n\
7877 \tcatch fork - calls to fork()\n\
7878 \tcatch vfork - calls to vfork()\n\
7879 \tcatch exec - calls to exec()\n\
7880 Dynamically-linked library events may be caught:\n\
7881 \tcatch load - loads of any library\n\
7882 \tcatch load <libname> - loads of a particular library\n\
7883 \tcatch unload - unloads of any library\n\
7884 \tcatch unload <libname> - unloads of a particular library\n\
7885 The act of your program's execution stopping may also be caught:\n\
7887 C++ exceptions may be caught:\n\
7888 \tcatch throw - all exceptions, when thrown\n\
7889 \tcatch catch - all exceptions, when caught\n\
7891 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7892 after a fork or vfork is caught.\n\n\
7893 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7895 add_com ("tcatch", class_breakpoint, tcatch_command,
7896 "Set temporary catchpoints to catch events.\n\
7897 Args like \"catch\" command.\n\
7898 Like \"catch\" except the catchpoint is only temporary,\n\
7899 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7900 by using \"enable delete\" on the catchpoint number.");
7902 c = add_com ("watch", class_breakpoint, watch_command,
7903 "Set a watchpoint for an expression.\n\
7904 A watchpoint stops execution of your program whenever the value of\n\
7905 an expression changes.");
7906 c->completer = location_completer;
7908 c = add_com ("rwatch", class_breakpoint, rwatch_command,
7909 "Set a read watchpoint for an expression.\n\
7910 A watchpoint stops execution of your program whenever the value of\n\
7911 an expression is read.");
7912 c->completer = location_completer;
7914 c = add_com ("awatch", class_breakpoint, awatch_command,
7915 "Set a watchpoint for an expression.\n\
7916 A watchpoint stops execution of your program whenever the value of\n\
7917 an expression is either read or written.");
7918 c->completer = location_completer;
7920 add_info ("watchpoints", breakpoints_info,
7921 "Synonym for ``info breakpoints''.");
7924 c = add_set_cmd ("can-use-hw-watchpoints", class_support, var_zinteger,
7925 (char *) &can_use_hw_watchpoints,
7926 "Set debugger's willingness to use watchpoint hardware.\n\
7927 If zero, gdb will not use hardware for new watchpoints, even if\n\
7928 such is available. (However, any hardware watchpoints that were\n\
7929 created before setting this to nonzero, will continue to use watchpoint\n\
7932 add_show_from_set (c, &showlist);
7934 can_use_hw_watchpoints = 1;