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 bp_addr = *pc - (not_a_breakpoint && !SOFTWARE_SINGLE_STEP_P () ?
2414 0 : DECR_PC_AFTER_BREAK);
2416 ALL_BREAKPOINTS_SAFE (b, temp)
2418 if (b->enable == disabled
2419 || b->enable == shlib_disabled
2420 || b->enable == call_disabled)
2423 if (b->type != bp_watchpoint
2424 && b->type != bp_hardware_watchpoint
2425 && b->type != bp_read_watchpoint
2426 && b->type != bp_access_watchpoint
2427 && b->type != bp_hardware_breakpoint
2428 && b->type != bp_catch_fork
2429 && b->type != bp_catch_vfork
2430 && b->type != bp_catch_exec
2431 && b->type != bp_catch_catch
2432 && b->type != bp_catch_throw) /* a non-watchpoint bp */
2433 if (b->address != bp_addr || /* address doesn't match or */
2434 (overlay_debugging && /* overlay doesn't match */
2435 section_is_overlay (b->section) &&
2436 !section_is_mapped (b->section)))
2439 if (b->type == bp_hardware_breakpoint
2440 && b->address != (*pc - DECR_PC_AFTER_HW_BREAK))
2443 /* Is this a catchpoint of a load or unload? If so, did we
2444 get a load or unload of the specified library? If not,
2446 if ((b->type == bp_catch_load)
2447 #if defined(SOLIB_HAVE_LOAD_EVENT)
2448 && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid))
2449 || ((b->dll_pathname != NULL)
2450 && (strcmp (b->dll_pathname,
2451 SOLIB_LOADED_LIBRARY_PATHNAME (
2452 PIDGET (inferior_ptid)))
2458 if ((b->type == bp_catch_unload)
2459 #if defined(SOLIB_HAVE_UNLOAD_EVENT)
2460 && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid))
2461 || ((b->dll_pathname != NULL)
2462 && (strcmp (b->dll_pathname,
2463 SOLIB_UNLOADED_LIBRARY_PATHNAME (
2464 PIDGET (inferior_ptid)))
2470 if ((b->type == bp_catch_fork)
2471 && !target_has_forked (PIDGET (inferior_ptid),
2472 &b->forked_inferior_pid))
2475 if ((b->type == bp_catch_vfork)
2476 && !target_has_vforked (PIDGET (inferior_ptid),
2477 &b->forked_inferior_pid))
2480 if ((b->type == bp_catch_exec)
2481 && !target_has_execd (PIDGET (inferior_ptid), &b->exec_pathname))
2484 if (ep_is_exception_catchpoint (b) &&
2485 !(current_exception_event = target_get_current_exception_event ()))
2488 /* Come here if it's a watchpoint, or if the break address matches */
2490 bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */
2492 /* Watchpoints may change this, if not found to have triggered. */
2496 sprintf (message, message1, b->number);
2497 if (b->type == bp_watchpoint ||
2498 b->type == bp_hardware_watchpoint)
2500 switch (catch_errors (watchpoint_check, bs, message,
2504 /* We've already printed what needs to be printed. */
2505 /* Actually this is superfluous, because by the time we
2506 call print_it_typical() the wp will be already deleted,
2507 and the function will return immediately. */
2508 bs->print_it = print_it_done;
2511 case WP_VALUE_CHANGED:
2515 case WP_VALUE_NOT_CHANGED:
2517 bs->print_it = print_it_noop;
2524 /* Error from catch_errors. */
2525 printf_filtered ("Watchpoint %d deleted.\n", b->number);
2526 if (b->related_breakpoint)
2527 b->related_breakpoint->disposition = del_at_next_stop;
2528 b->disposition = del_at_next_stop;
2529 /* We've already printed what needs to be printed. */
2530 bs->print_it = print_it_done;
2536 else if (b->type == bp_read_watchpoint ||
2537 b->type == bp_access_watchpoint)
2543 addr = target_stopped_data_address ();
2546 for (v = b->val_chain; v; v = v->next)
2548 if (VALUE_LVAL (v) == lval_memory
2549 && ! VALUE_LAZY (v))
2551 struct type *vtype = check_typedef (VALUE_TYPE (v));
2553 if (v == b->val_chain
2554 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
2555 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
2559 vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
2560 /* Exact match not required. Within range is
2562 if (addr >= vaddr &&
2563 addr < vaddr + TYPE_LENGTH (VALUE_TYPE (v)))
2569 switch (catch_errors (watchpoint_check, bs, message,
2573 /* We've already printed what needs to be printed. */
2574 bs->print_it = print_it_done;
2577 case WP_VALUE_CHANGED:
2578 if (b->type == bp_read_watchpoint)
2580 /* Don't stop: read watchpoints shouldn't fire if
2581 the value has changed. This is for targets which
2582 cannot set read-only watchpoints. */
2583 bs->print_it = print_it_noop;
2589 case WP_VALUE_NOT_CHANGED:
2596 /* Error from catch_errors. */
2597 printf_filtered ("Watchpoint %d deleted.\n", b->number);
2598 if (b->related_breakpoint)
2599 b->related_breakpoint->disposition = del_at_next_stop;
2600 b->disposition = del_at_next_stop;
2601 /* We've already printed what needs to be printed. */
2602 bs->print_it = print_it_done;
2605 else /* found == 0 */
2607 /* This is a case where some watchpoint(s) triggered,
2608 but not at the address of this watchpoint (FOUND
2609 was left zero). So don't print anything for this
2611 bs->print_it = print_it_noop;
2618 /* By definition, an encountered breakpoint is a triggered
2622 real_breakpoint = 1;
2626 b->frame != (get_current_frame ())->frame)
2630 int value_is_zero = 0;
2634 /* Need to select the frame, with all that implies
2635 so that the conditions will have the right context. */
2636 select_frame (get_current_frame (), 0);
2638 = catch_errors (breakpoint_cond_eval, (b->cond),
2639 "Error in testing breakpoint condition:\n",
2641 /* FIXME-someday, should give breakpoint # */
2644 if (b->cond && value_is_zero)
2647 /* Don't consider this a hit. */
2650 else if (b->ignore_count > 0)
2653 annotate_ignore_count_change ();
2658 /* We will stop here */
2659 if (b->disposition == disable)
2660 b->enable = disabled;
2661 bs->commands = b->commands;
2665 (STREQ ("silent", bs->commands->line) ||
2666 (xdb_commands && STREQ ("Q", bs->commands->line))))
2668 bs->commands = bs->commands->next;
2673 /* Print nothing for this entry if we dont stop or if we dont print. */
2674 if (bs->stop == 0 || bs->print == 0)
2675 bs->print_it = print_it_noop;
2678 bs->next = NULL; /* Terminate the chain */
2679 bs = root_bs->next; /* Re-grab the head of the chain */
2681 if (real_breakpoint && bs)
2683 if (bs->breakpoint_at->type == bp_hardware_breakpoint)
2685 if (DECR_PC_AFTER_HW_BREAK != 0)
2687 *pc = *pc - DECR_PC_AFTER_HW_BREAK;
2693 if (DECR_PC_AFTER_BREAK != 0 || must_shift_inst_regs)
2696 #if defined (SHIFT_INST_REGS)
2698 #else /* No SHIFT_INST_REGS. */
2700 #endif /* No SHIFT_INST_REGS. */
2705 /* The value of a hardware watchpoint hasn't changed, but the
2706 intermediate memory locations we are watching may have. */
2707 if (bs && !bs->stop &&
2708 (bs->breakpoint_at->type == bp_hardware_watchpoint ||
2709 bs->breakpoint_at->type == bp_read_watchpoint ||
2710 bs->breakpoint_at->type == bp_access_watchpoint))
2712 remove_breakpoints ();
2713 insert_breakpoints ();
2718 /* Tell what to do about this bpstat. */
2720 bpstat_what (bpstat bs)
2722 /* Classify each bpstat as one of the following. */
2725 /* This bpstat element has no effect on the main_action. */
2728 /* There was a watchpoint, stop but don't print. */
2731 /* There was a watchpoint, stop and print. */
2734 /* There was a breakpoint but we're not stopping. */
2737 /* There was a breakpoint, stop but don't print. */
2740 /* There was a breakpoint, stop and print. */
2743 /* We hit the longjmp breakpoint. */
2746 /* We hit the longjmp_resume breakpoint. */
2749 /* We hit the step_resume breakpoint. */
2752 /* We hit the through_sigtramp breakpoint. */
2755 /* We hit the shared library event breakpoint. */
2758 /* We caught a shared library event. */
2761 /* This is just used to count how many enums there are. */
2765 /* Here is the table which drives this routine. So that we can
2766 format it pretty, we define some abbreviations for the
2767 enum bpstat_what codes. */
2768 #define kc BPSTAT_WHAT_KEEP_CHECKING
2769 #define ss BPSTAT_WHAT_STOP_SILENT
2770 #define sn BPSTAT_WHAT_STOP_NOISY
2771 #define sgl BPSTAT_WHAT_SINGLE
2772 #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
2773 #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
2774 #define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
2775 #define sr BPSTAT_WHAT_STEP_RESUME
2776 #define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
2777 #define shl BPSTAT_WHAT_CHECK_SHLIBS
2778 #define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
2780 /* "Can't happen." Might want to print an error message.
2781 abort() is not out of the question, but chances are GDB is just
2782 a bit confused, not unusable. */
2783 #define err BPSTAT_WHAT_STOP_NOISY
2785 /* Given an old action and a class, come up with a new action. */
2786 /* One interesting property of this table is that wp_silent is the same
2787 as bp_silent and wp_noisy is the same as bp_noisy. That is because
2788 after stopping, the check for whether to step over a breakpoint
2789 (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
2790 reference to how we stopped. We retain separate wp_silent and
2791 bp_silent codes in case we want to change that someday.
2793 Another possibly interesting property of this table is that
2794 there's a partial ordering, priority-like, of the actions. Once
2795 you've decided that some action is appropriate, you'll never go
2796 back and decide something of a lower priority is better. The
2799 kc < clr sgl shl shlr slr sn sr ss ts
2800 sgl < clrs shl shlr slr sn sr ss ts
2801 slr < err shl shlr sn sr ss ts
2802 clr < clrs err shl shlr sn sr ss ts
2803 clrs < err shl shlr sn sr ss ts
2804 ss < shl shlr sn sr ts
2811 What I think this means is that we don't need a damned table
2812 here. If you just put the rows and columns in the right order,
2813 it'd look awfully regular. We could simply walk the bpstat list
2814 and choose the highest priority action we find, with a little
2815 logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
2816 CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
2817 is messy anyway). */
2819 /* step_resume entries: a step resume breakpoint overrides another
2820 breakpoint of signal handling (see comment in wait_for_inferior
2821 at first IN_SIGTRAMP where we set the step_resume breakpoint). */
2822 /* We handle the through_sigtramp_breakpoint the same way; having both
2823 one of those and a step_resume_breakpoint is probably very rare (?). */
2825 static const enum bpstat_what_main_action
2826 table[(int) class_last][(int) BPSTAT_WHAT_LAST] =
2829 /* kc ss sn sgl slr clr clrs sr ts shl shlr
2832 {kc, ss, sn, sgl, slr, clr, clrs, sr, ts, shl, shlr},
2834 {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
2836 {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
2838 {sgl, ss, sn, sgl, slr, clrs, clrs, sr, ts, shl, shlr},
2840 {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
2842 {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
2844 {slr, ss, sn, slr, slr, err, err, sr, ts, shl, shlr},
2846 {clr, ss, sn, clrs, err, err, err, sr, ts, shl, shlr},
2848 {sr, sr, sr, sr, sr, sr, sr, sr, ts, shl, shlr},
2850 {ts, ts, ts, ts, ts, ts, ts, ts, ts, shl, shlr},
2852 {shl, shl, shl, shl, shl, shl, shl, shl, ts, shl, shlr},
2854 {shlr, shlr, shlr, shlr, shlr, shlr, shlr, shlr, ts, shlr, shlr}
2869 enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING;
2870 struct bpstat_what retval;
2872 retval.call_dummy = 0;
2873 for (; bs != NULL; bs = bs->next)
2875 enum class bs_class = no_effect;
2876 if (bs->breakpoint_at == NULL)
2877 /* I suspect this can happen if it was a momentary breakpoint
2878 which has since been deleted. */
2880 switch (bs->breakpoint_at->type)
2886 case bp_hardware_breakpoint:
2892 bs_class = bp_noisy;
2894 bs_class = bp_silent;
2897 bs_class = bp_nostop;
2900 case bp_hardware_watchpoint:
2901 case bp_read_watchpoint:
2902 case bp_access_watchpoint:
2906 bs_class = wp_noisy;
2908 bs_class = wp_silent;
2911 /* There was a watchpoint, but we're not stopping.
2912 This requires no further action. */
2913 bs_class = no_effect;
2916 bs_class = long_jump;
2918 case bp_longjmp_resume:
2919 bs_class = long_resume;
2921 case bp_step_resume:
2924 bs_class = step_resume;
2927 /* It is for the wrong frame. */
2928 bs_class = bp_nostop;
2930 case bp_through_sigtramp:
2931 bs_class = through_sig;
2933 case bp_watchpoint_scope:
2934 bs_class = bp_nostop;
2936 case bp_shlib_event:
2937 bs_class = shlib_event;
2939 case bp_thread_event:
2940 bs_class = bp_nostop;
2943 case bp_catch_unload:
2944 /* Only if this catchpoint triggered should we cause the
2945 step-out-of-dld behaviour. Otherwise, we ignore this
2948 bs_class = catch_shlib_event;
2950 bs_class = no_effect;
2953 case bp_catch_vfork:
2958 bs_class = bp_noisy;
2960 bs_class = bp_silent;
2963 /* There was a catchpoint, but we're not stopping.
2964 This requires no further action. */
2965 bs_class = no_effect;
2967 case bp_catch_catch:
2968 if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_CATCH)
2969 bs_class = bp_nostop;
2971 bs_class = bs->print ? bp_noisy : bp_silent;
2973 case bp_catch_throw:
2974 if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_THROW)
2975 bs_class = bp_nostop;
2977 bs_class = bs->print ? bp_noisy : bp_silent;
2980 /* Make sure the action is stop (silent or noisy),
2981 so infrun.c pops the dummy frame. */
2982 bs_class = bp_silent;
2983 retval.call_dummy = 1;
2986 current_action = table[(int) bs_class][(int) current_action];
2988 retval.main_action = current_action;
2992 /* Nonzero if we should step constantly (e.g. watchpoints on machines
2993 without hardware support). This isn't related to a specific bpstat,
2994 just to things like whether watchpoints are set. */
2997 bpstat_should_step (void)
2999 struct breakpoint *b;
3001 if (b->enable == enabled && b->type == bp_watchpoint)
3006 /* Nonzero if there are enabled hardware watchpoints. */
3008 bpstat_have_active_hw_watchpoints (void)
3010 struct breakpoint *b;
3012 if ((b->enable == enabled) &&
3014 ((b->type == bp_hardware_watchpoint) ||
3015 (b->type == bp_read_watchpoint) ||
3016 (b->type == bp_access_watchpoint)))
3022 /* Given a bpstat that records zero or more triggered eventpoints, this
3023 function returns another bpstat which contains only the catchpoints
3024 on that first list, if any. */
3026 bpstat_get_triggered_catchpoints (bpstat ep_list, bpstat *cp_list)
3028 struct bpstats root_bs[1];
3029 bpstat bs = root_bs;
3030 struct breakpoint *ep;
3033 bpstat_clear (cp_list);
3034 root_bs->next = NULL;
3036 for (; ep_list != NULL; ep_list = ep_list->next)
3038 /* Is this eventpoint a catchpoint? If not, ignore it. */
3039 ep = ep_list->breakpoint_at;
3042 if ((ep->type != bp_catch_load) &&
3043 (ep->type != bp_catch_unload) &&
3044 (ep->type != bp_catch_catch) &&
3045 (ep->type != bp_catch_throw))
3046 /* pai: (temp) ADD fork/vfork here!! */
3049 /* Yes; add it to the list. */
3050 bs = bpstat_alloc (ep, bs);
3055 #if defined(SOLIB_ADD)
3056 /* Also, for each triggered catchpoint, tag it with the name of
3057 the library that caused this trigger. (We copy the name now,
3058 because it's only guaranteed to be available NOW, when the
3059 catchpoint triggers. Clients who may wish to know the name
3060 later must get it from the catchpoint itself.) */
3061 if (ep->triggered_dll_pathname != NULL)
3062 xfree (ep->triggered_dll_pathname);
3063 if (ep->type == bp_catch_load)
3064 dll_pathname = SOLIB_LOADED_LIBRARY_PATHNAME (
3065 PIDGET (inferior_ptid));
3067 dll_pathname = SOLIB_UNLOADED_LIBRARY_PATHNAME (
3068 PIDGET (inferior_ptid));
3070 dll_pathname = NULL;
3074 ep->triggered_dll_pathname = (char *)
3075 xmalloc (strlen (dll_pathname) + 1);
3076 strcpy (ep->triggered_dll_pathname, dll_pathname);
3079 ep->triggered_dll_pathname = NULL;
3085 /* Print B to gdb_stdout. */
3087 print_one_breakpoint (struct breakpoint *b,
3088 CORE_ADDR *last_addr)
3090 register struct command_line *l;
3091 register struct symbol *sym;
3092 struct ep_type_description
3097 static struct ep_type_description bptypes[] =
3099 {bp_none, "?deleted?"},
3100 {bp_breakpoint, "breakpoint"},
3101 {bp_hardware_breakpoint, "hw breakpoint"},
3102 {bp_until, "until"},
3103 {bp_finish, "finish"},
3104 {bp_watchpoint, "watchpoint"},
3105 {bp_hardware_watchpoint, "hw watchpoint"},
3106 {bp_read_watchpoint, "read watchpoint"},
3107 {bp_access_watchpoint, "acc watchpoint"},
3108 {bp_longjmp, "longjmp"},
3109 {bp_longjmp_resume, "longjmp resume"},
3110 {bp_step_resume, "step resume"},
3111 {bp_through_sigtramp, "sigtramp"},
3112 {bp_watchpoint_scope, "watchpoint scope"},
3113 {bp_call_dummy, "call dummy"},
3114 {bp_shlib_event, "shlib events"},
3115 {bp_thread_event, "thread events"},
3116 {bp_catch_load, "catch load"},
3117 {bp_catch_unload, "catch unload"},
3118 {bp_catch_fork, "catch fork"},
3119 {bp_catch_vfork, "catch vfork"},
3120 {bp_catch_exec, "catch exec"},
3121 {bp_catch_catch, "catch catch"},
3122 {bp_catch_throw, "catch throw"}
3125 static char *bpdisps[] =
3126 {"del", "dstp", "dis", "keep"};
3127 static char bpenables[] = "nynny";
3128 char wrap_indent[80];
3130 struct ui_stream *stb = ui_out_stream_new (uiout);
3131 struct cleanup *old_chain = make_cleanup_ui_out_stream_delete (stb);
3136 ui_out_tuple_begin (uiout, "bkpt");
3142 ui_out_field_int (uiout, "number", b->number);
3144 printf_filtered ("%-3d ", b->number);
3149 if (((int) b->type > (sizeof (bptypes) / sizeof (bptypes[0])))
3150 || ((int) b->type != bptypes[(int) b->type].type))
3151 internal_error (__FILE__, __LINE__,
3152 "bptypes table does not describe type #%d.",
3155 ui_out_field_string (uiout, "type", bptypes[(int) b->type].description);
3157 printf_filtered ("%-14s ", bptypes[(int) b->type].description);
3163 ui_out_field_string (uiout, "disp", bpdisps[(int) b->disposition]);
3165 printf_filtered ("%-4s ", bpdisps[(int) b->disposition]);
3171 ui_out_field_fmt (uiout, "enabled", "%c", bpenables[(int) b->enable]);
3172 ui_out_spaces (uiout, 2);
3174 printf_filtered ("%-3c ", bpenables[(int) b->enable]);
3178 strcpy (wrap_indent, " ");
3181 if (TARGET_ADDR_BIT <= 32)
3182 strcat (wrap_indent, " ");
3184 strcat (wrap_indent, " ");
3189 internal_error (__FILE__, __LINE__,
3190 "print_one_breakpoint: bp_none encountered\n");
3194 case bp_hardware_watchpoint:
3195 case bp_read_watchpoint:
3196 case bp_access_watchpoint:
3197 /* Field 4, the address, is omitted (which makes the columns
3198 not line up too nicely with the headers, but the effect
3199 is relatively readable). */
3202 ui_out_field_skip (uiout, "addr");
3204 print_expression (b->exp, stb->stream);
3205 ui_out_field_stream (uiout, "what", stb);
3208 print_expression (b->exp, gdb_stdout);
3213 case bp_catch_unload:
3214 /* Field 4, the address, is omitted (which makes the columns
3215 not line up too nicely with the headers, but the effect
3216 is relatively readable). */
3219 ui_out_field_skip (uiout, "addr");
3221 if (b->dll_pathname == NULL)
3223 ui_out_field_string (uiout, "what", "<any library>");
3224 ui_out_spaces (uiout, 1);
3228 ui_out_text (uiout, "library \"");
3229 ui_out_field_string (uiout, "what", b->dll_pathname);
3230 ui_out_text (uiout, "\" ");
3234 if (b->dll_pathname == NULL)
3235 printf_filtered ("<any library> ");
3237 printf_filtered ("library \"%s\" ", b->dll_pathname);
3242 case bp_catch_vfork:
3243 /* Field 4, the address, is omitted (which makes the columns
3244 not line up too nicely with the headers, but the effect
3245 is relatively readable). */
3248 ui_out_field_skip (uiout, "addr");
3250 if (b->forked_inferior_pid != 0)
3252 ui_out_text (uiout, "process ");
3253 ui_out_field_int (uiout, "what", b->forked_inferior_pid);
3254 ui_out_spaces (uiout, 1);
3258 if (b->forked_inferior_pid != 0)
3259 printf_filtered ("process %d ", b->forked_inferior_pid);
3264 /* Field 4, the address, is omitted (which makes the columns
3265 not line up too nicely with the headers, but the effect
3266 is relatively readable). */
3269 ui_out_field_skip (uiout, "addr");
3271 if (b->exec_pathname != NULL)
3273 ui_out_text (uiout, "program \"");
3274 ui_out_field_string (uiout, "what", b->exec_pathname);
3275 ui_out_text (uiout, "\" ");
3279 if (b->exec_pathname != NULL)
3280 printf_filtered ("program \"%s\" ", b->exec_pathname);
3284 case bp_catch_catch:
3285 /* Field 4, the address, is omitted (which makes the columns
3286 not line up too nicely with the headers, but the effect
3287 is relatively readable). */
3290 ui_out_field_skip (uiout, "addr");
3292 ui_out_field_string (uiout, "what", "exception catch");
3293 ui_out_spaces (uiout, 1);
3296 printf_filtered ("exception catch ");
3300 case bp_catch_throw:
3301 /* Field 4, the address, is omitted (which makes the columns
3302 not line up too nicely with the headers, but the effect
3303 is relatively readable). */
3306 ui_out_field_skip (uiout, "addr");
3308 ui_out_field_string (uiout, "what", "exception throw");
3309 ui_out_spaces (uiout, 1);
3312 printf_filtered ("exception throw ");
3317 case bp_hardware_breakpoint:
3321 case bp_longjmp_resume:
3322 case bp_step_resume:
3323 case bp_through_sigtramp:
3324 case bp_watchpoint_scope:
3326 case bp_shlib_event:
3327 case bp_thread_event:
3332 ui_out_field_core_addr (uiout, "addr", b->address);
3335 *last_addr = b->address;
3338 sym = find_pc_sect_function (b->address, b->section);
3341 ui_out_text (uiout, "in ");
3342 ui_out_field_string (uiout, "func",
3343 SYMBOL_SOURCE_NAME (sym));
3344 ui_out_wrap_hint (uiout, wrap_indent);
3345 ui_out_text (uiout, " at ");
3347 ui_out_field_string (uiout, "file", b->source_file);
3348 ui_out_text (uiout, ":");
3349 ui_out_field_int (uiout, "line", b->line_number);
3353 print_address_symbolic (b->address, stb->stream, demangle, "");
3354 ui_out_field_stream (uiout, "at", stb);
3363 if (TARGET_ADDR_BIT <= 32)
3364 tmp = longest_local_hex_string_custom (b->address
3365 & (CORE_ADDR) 0xffffffff,
3368 tmp = longest_local_hex_string_custom (b->address, "016l");
3370 printf_filtered ("%s ", tmp);
3373 *last_addr = b->address;
3376 sym = find_pc_sect_function (b->address, b->section);
3379 fputs_filtered ("in ", gdb_stdout);
3380 fputs_filtered (SYMBOL_SOURCE_NAME (sym), gdb_stdout);
3381 wrap_here (wrap_indent);
3382 fputs_filtered (" at ", gdb_stdout);
3384 fputs_filtered (b->source_file, gdb_stdout);
3385 printf_filtered (":%d", b->line_number);
3388 print_address_symbolic (b->address, gdb_stdout, demangle, " ");
3393 if (b->thread != -1)
3396 /* FIXME: This seems to be redundant and lost here; see the
3397 "stop only in" line a little further down. */
3398 ui_out_text (uiout, " thread ");
3399 ui_out_field_int (uiout, "thread", b->thread);
3401 printf_filtered (" thread %d", b->thread);
3406 ui_out_text (uiout, "\n");
3408 printf_filtered ("\n");
3415 ui_out_text (uiout, "\tstop only in stack frame at ");
3416 ui_out_field_core_addr (uiout, "frame", b->frame);
3417 ui_out_text (uiout, "\n");
3419 printf_filtered ("\tstop only in stack frame at ");
3420 print_address_numeric (b->frame, 1, gdb_stdout);
3421 printf_filtered ("\n");
3429 ui_out_text (uiout, "\tstop only if ");
3430 print_expression (b->cond, stb->stream);
3431 ui_out_field_stream (uiout, "cond", stb);
3432 ui_out_text (uiout, "\n");
3434 printf_filtered ("\tstop only if ");
3435 print_expression (b->cond, gdb_stdout);
3436 printf_filtered ("\n");
3440 if (b->thread != -1)
3442 /* FIXME should make an annotation for this */
3444 ui_out_text (uiout, "\tstop only in thread ");
3445 ui_out_field_int (uiout, "thread", b->thread);
3446 ui_out_text (uiout, "\n");
3448 printf_filtered ("\tstop only in thread %d\n", b->thread);
3452 if (show_breakpoint_hit_counts && b->hit_count)
3454 /* FIXME should make an annotation for this */
3456 if (ep_is_catchpoint (b))
3457 ui_out_text (uiout, "\tcatchpoint");
3459 ui_out_text (uiout, "\tbreakpoint");
3460 ui_out_text (uiout, " already hit ");
3461 ui_out_field_int (uiout, "times", b->hit_count);
3462 if (b->hit_count == 1)
3463 ui_out_text (uiout, " time\n");
3465 ui_out_text (uiout, " times\n");
3467 if (ep_is_catchpoint (b))
3468 printf_filtered ("\tcatchpoint");
3470 printf_filtered ("\tbreakpoint");
3471 printf_filtered (" already hit %d time%s\n",
3472 b->hit_count, (b->hit_count == 1 ? "" : "s"));
3477 /* Output the count also if it is zero, but only if this is
3478 mi. FIXME: Should have a better test for this. */
3479 if (interpreter_p && strncmp (interpreter_p, "mi", 2) == 0)
3480 if (show_breakpoint_hit_counts && b->hit_count == 0)
3481 ui_out_field_int (uiout, "times", b->hit_count);
3484 if (b->ignore_count)
3488 ui_out_text (uiout, "\tignore next ");
3489 ui_out_field_int (uiout, "ignore", b->ignore_count);
3490 ui_out_text (uiout, " hits\n");
3492 printf_filtered ("\tignore next %d hits\n", b->ignore_count);
3496 if ((l = b->commands))
3500 ui_out_tuple_begin (uiout, "script");
3501 print_command_lines (uiout, l, 4);
3502 ui_out_tuple_end (uiout);
3506 print_command_line (l, 4, gdb_stdout);
3512 ui_out_tuple_end (uiout);
3513 do_cleanups (old_chain);
3517 struct captured_breakpoint_query_args
3523 do_captured_breakpoint_query (void *data)
3525 struct captured_breakpoint_query_args *args = data;
3526 register struct breakpoint *b;
3527 CORE_ADDR dummy_addr = 0;
3530 if (args->bnum == b->number)
3532 print_one_breakpoint (b, &dummy_addr);
3540 gdb_breakpoint_query (/* output object, */ int bnum)
3542 struct captured_breakpoint_query_args args;
3544 /* For the moment we don't trust print_one_breakpoint() to not throw
3546 return catch_errors (do_captured_breakpoint_query, &args,
3547 NULL, RETURN_MASK_ALL);
3550 /* Return non-zero if B is user settable (breakpoints, watchpoints,
3551 catchpoints, et.al.). */
3554 user_settable_breakpoint (const struct breakpoint *b)
3556 return (b->type == bp_breakpoint
3557 || b->type == bp_catch_load
3558 || b->type == bp_catch_unload
3559 || b->type == bp_catch_fork
3560 || b->type == bp_catch_vfork
3561 || b->type == bp_catch_exec
3562 || b->type == bp_catch_catch
3563 || b->type == bp_catch_throw
3564 || b->type == bp_hardware_breakpoint
3565 || b->type == bp_watchpoint
3566 || b->type == bp_read_watchpoint
3567 || b->type == bp_access_watchpoint
3568 || b->type == bp_hardware_watchpoint);
3571 /* Print information on user settable breakpoint (watchpoint, etc)
3572 number BNUM. If BNUM is -1 print all user settable breakpoints.
3573 If ALLFLAG is non-zero, include non- user settable breakpoints. */
3576 breakpoint_1 (int bnum, int allflag)
3578 register struct breakpoint *b;
3579 CORE_ADDR last_addr = (CORE_ADDR) -1;
3580 int nr_printable_breakpoints;
3582 /* Compute the number of rows in the table. */
3583 nr_printable_breakpoints = 0;
3586 || bnum == b->number)
3588 if (allflag || user_settable_breakpoint (b))
3589 nr_printable_breakpoints++;
3594 ui_out_table_begin (uiout, 6, nr_printable_breakpoints, "BreakpointTable");
3596 ui_out_table_begin (uiout, 5, nr_printable_breakpoints, "BreakpointTable");
3600 if (nr_printable_breakpoints > 0)
3602 annotate_breakpoints_headers ();
3604 ui_out_table_header (uiout, 3, ui_left, "number", "Num"); /* 1 */
3606 ui_out_table_header (uiout, 14, ui_left, "type", "Type"); /* 2 */
3608 ui_out_table_header (uiout, 4, ui_left, "disp", "Disp"); /* 3 */
3610 ui_out_table_header (uiout, 3, ui_left, "enabled", "Enb"); /* 4 */
3614 if (TARGET_ADDR_BIT <= 32)
3615 ui_out_table_header (uiout, 10, ui_left, "addr", "Address");/* 5 */
3617 ui_out_table_header (uiout, 18, ui_left, "addr", "Address");/* 5 */
3620 ui_out_table_header (uiout, 40, ui_noalign, "what", "What"); /* 6 */
3621 ui_out_table_body (uiout);
3622 annotate_breakpoints_table ();
3625 if (nr_printable_breakpoints > 0)
3627 annotate_breakpoints_headers ();
3629 printf_filtered ("Num ");
3631 printf_filtered ("Type ");
3633 printf_filtered ("Disp ");
3635 printf_filtered ("Enb ");
3639 if (TARGET_ADDR_BIT <= 32)
3640 printf_filtered ("Address ");
3642 printf_filtered ("Address ");
3645 printf_filtered ("What\n");
3646 annotate_breakpoints_table ();
3652 || bnum == b->number)
3654 /* We only print out user settable breakpoints unless the
3656 if (allflag || user_settable_breakpoint (b))
3657 print_one_breakpoint (b, &last_addr);
3662 ui_out_table_end (uiout);
3665 if (nr_printable_breakpoints == 0)
3669 ui_out_message (uiout, 0, "No breakpoints or watchpoints.\n");
3671 ui_out_message (uiout, 0, "No breakpoint or watchpoint number %d.\n",
3675 printf_filtered ("No breakpoints or watchpoints.\n");
3677 printf_filtered ("No breakpoint or watchpoint number %d.\n", bnum);
3682 /* Compare against (CORE_ADDR)-1 in case some compiler decides
3683 that a comparison of an unsigned with -1 is always false. */
3684 if (last_addr != (CORE_ADDR) -1)
3685 set_next_address (last_addr);
3688 /* FIXME? Should this be moved up so that it is only called when
3689 there have been breakpoints? */
3690 annotate_breakpoints_table_end ();
3695 breakpoints_info (char *bnum_exp, int from_tty)
3700 bnum = parse_and_eval_long (bnum_exp);
3702 breakpoint_1 (bnum, 0);
3707 maintenance_info_breakpoints (char *bnum_exp, int from_tty)
3712 bnum = parse_and_eval_long (bnum_exp);
3714 breakpoint_1 (bnum, 1);
3717 /* Print a message describing any breakpoints set at PC. */
3720 describe_other_breakpoints (CORE_ADDR pc, asection *section)
3722 register int others = 0;
3723 register struct breakpoint *b;
3726 if (b->address == pc)
3727 if (overlay_debugging == 0 ||
3728 b->section == section)
3732 printf_filtered ("Note: breakpoint%s ", (others > 1) ? "s" : "");
3734 if (b->address == pc)
3735 if (overlay_debugging == 0 ||
3736 b->section == section)
3739 printf_filtered ("%d%s%s ",
3741 ((b->enable == disabled ||
3742 b->enable == shlib_disabled ||
3743 b->enable == call_disabled) ? " (disabled)"
3744 : b->enable == permanent ? " (permanent)"
3747 : ((others == 1) ? " and" : ""));
3749 printf_filtered ("also set at pc ");
3750 print_address_numeric (pc, 1, gdb_stdout);
3751 printf_filtered (".\n");
3755 /* Set the default place to put a breakpoint
3756 for the `break' command with no arguments. */
3759 set_default_breakpoint (int valid, CORE_ADDR addr, struct symtab *symtab,
3762 default_breakpoint_valid = valid;
3763 default_breakpoint_address = addr;
3764 default_breakpoint_symtab = symtab;
3765 default_breakpoint_line = line;
3768 /* Return true iff it is meaningful to use the address member of
3769 BPT. For some breakpoint types, the address member is irrelevant
3770 and it makes no sense to attempt to compare it to other addresses
3771 (or use it for any other purpose either).
3773 More specifically, each of the following breakpoint types will always
3774 have a zero valued address and we don't want check_duplicates() to mark
3775 breakpoints of any of these types to be a duplicate of an actual
3776 breakpoint at address zero:
3779 bp_hardware_watchpoint
3781 bp_access_watchpoint
3788 breakpoint_address_is_meaningful (struct breakpoint *bpt)
3790 enum bptype type = bpt->type;
3792 return (type != bp_watchpoint
3793 && type != bp_hardware_watchpoint
3794 && type != bp_read_watchpoint
3795 && type != bp_access_watchpoint
3796 && type != bp_catch_exec
3797 && type != bp_longjmp_resume
3798 && type != bp_catch_fork
3799 && type != bp_catch_vfork);
3802 /* Rescan breakpoints at the same address and section as BPT,
3803 marking the first one as "first" and any others as "duplicates".
3804 This is so that the bpt instruction is only inserted once.
3805 If we have a permanent breakpoint at the same place as BPT, make
3806 that one the official one, and the rest as duplicates. */
3809 check_duplicates (struct breakpoint *bpt)
3811 register struct breakpoint *b;
3812 register int count = 0;
3813 struct breakpoint *perm_bp = 0;
3814 CORE_ADDR address = bpt->address;
3815 asection *section = bpt->section;
3817 if (! breakpoint_address_is_meaningful (bpt))
3821 if (b->enable != disabled
3822 && b->enable != shlib_disabled
3823 && b->enable != call_disabled
3824 && b->address == address
3825 && (overlay_debugging == 0 || b->section == section)
3826 && breakpoint_address_is_meaningful (b))
3828 /* Have we found a permanent breakpoint? */
3829 if (b->enable == permanent)
3836 b->duplicate = count > 1;
3839 /* If we found a permanent breakpoint at this address, go over the
3840 list again and declare all the other breakpoints there to be the
3844 perm_bp->duplicate = 0;
3846 /* Permanent breakpoint should always be inserted. */
3847 if (! perm_bp->inserted)
3848 internal_error (__FILE__, __LINE__,
3849 "allegedly permanent breakpoint is not "
3850 "actually inserted");
3856 internal_error (__FILE__, __LINE__,
3857 "another breakpoint was inserted on top of "
3858 "a permanent breakpoint");
3860 if (b->enable != disabled
3861 && b->enable != shlib_disabled
3862 && b->enable != call_disabled
3863 && b->address == address
3864 && (overlay_debugging == 0 || b->section == section)
3865 && breakpoint_address_is_meaningful (b))
3871 /* set_raw_breakpoint() is a low level routine for allocating and
3872 partially initializing a breakpoint of type BPTYPE. The newly
3873 created breakpoint's address, section, source file name, and line
3874 number are provided by SAL. The newly created and partially
3875 initialized breakpoint is added to the breakpoint chain and
3876 is also returned as the value of this function.
3878 It is expected that the caller will complete the initialization of
3879 the newly created breakpoint struct as well as output any status
3880 information regarding the creation of a new breakpoint. In
3881 particular, set_raw_breakpoint() does NOT set the breakpoint
3882 number! Care should be taken to not allow an error() to occur
3883 prior to completing the initialization of the breakpoint. If this
3884 should happen, a bogus breakpoint will be left on the chain. */
3887 set_raw_breakpoint (struct symtab_and_line sal, enum bptype bptype)
3889 register struct breakpoint *b, *b1;
3891 b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint));
3892 memset (b, 0, sizeof (*b));
3893 b->address = sal.pc;
3894 if (sal.symtab == NULL)
3895 b->source_file = NULL;
3897 b->source_file = savestring (sal.symtab->filename,
3898 strlen (sal.symtab->filename));
3899 b->section = sal.section;
3901 b->language = current_language->la_language;
3902 b->input_radix = input_radix;
3904 b->line_number = sal.line;
3905 b->enable = enabled;
3908 b->ignore_count = 0;
3911 b->dll_pathname = NULL;
3912 b->triggered_dll_pathname = NULL;
3913 b->forked_inferior_pid = 0;
3914 b->exec_pathname = NULL;
3916 /* Add this breakpoint to the end of the chain
3917 so that a list of breakpoints will come out in order
3918 of increasing numbers. */
3920 b1 = breakpoint_chain;
3922 breakpoint_chain = b;
3930 check_duplicates (b);
3931 breakpoints_changed ();
3937 /* Note that the breakpoint object B describes a permanent breakpoint
3938 instruction, hard-wired into the inferior's code. */
3940 make_breakpoint_permanent (struct breakpoint *b)
3942 b->enable = permanent;
3944 /* By definition, permanent breakpoints are already present in the code. */
3948 #ifdef GET_LONGJMP_TARGET
3951 create_longjmp_breakpoint (char *func_name)
3953 struct symtab_and_line sal;
3954 struct breakpoint *b;
3956 INIT_SAL (&sal); /* initialize to zeroes */
3957 if (func_name != NULL)
3959 struct minimal_symbol *m;
3961 m = lookup_minimal_symbol_text (func_name, NULL,
3962 (struct objfile *) NULL);
3964 sal.pc = SYMBOL_VALUE_ADDRESS (m);
3968 sal.section = find_pc_overlay (sal.pc);
3969 b = set_raw_breakpoint (sal,
3970 func_name != NULL ? bp_longjmp : bp_longjmp_resume);
3972 b->disposition = donttouch;
3973 b->enable = disabled;
3976 b->addr_string = xstrdup (func_name);
3977 b->number = internal_breakpoint_number--;
3980 #endif /* #ifdef GET_LONGJMP_TARGET */
3982 /* Call this routine when stepping and nexting to enable a breakpoint
3983 if we do a longjmp(). When we hit that breakpoint, call
3984 set_longjmp_resume_breakpoint() to figure out where we are going. */
3987 enable_longjmp_breakpoint (void)
3989 register struct breakpoint *b;
3992 if (b->type == bp_longjmp)
3994 b->enable = enabled;
3995 check_duplicates (b);
4000 disable_longjmp_breakpoint (void)
4002 register struct breakpoint *b;
4005 if (b->type == bp_longjmp
4006 || b->type == bp_longjmp_resume)
4008 b->enable = disabled;
4009 check_duplicates (b);
4014 create_thread_event_breakpoint (CORE_ADDR address)
4016 struct breakpoint *b;
4017 struct symtab_and_line sal;
4018 char addr_string[80]; /* Surely an addr can't be longer than that. */
4020 INIT_SAL (&sal); /* initialize to zeroes */
4022 sal.section = find_pc_overlay (sal.pc);
4023 b = set_raw_breakpoint (sal, bp_thread_event);
4025 b->number = internal_breakpoint_number--;
4026 b->disposition = donttouch;
4027 b->enable = enabled;
4028 /* addr_string has to be used or breakpoint_re_set will delete me. */
4029 sprintf (addr_string, "*0x%s", paddr (b->address));
4030 b->addr_string = xstrdup (addr_string);
4036 remove_thread_event_breakpoints (void)
4038 struct breakpoint *b, *temp;
4040 ALL_BREAKPOINTS_SAFE (b, temp)
4041 if (b->type == bp_thread_event)
4042 delete_breakpoint (b);
4047 remove_solib_event_breakpoints (void)
4049 register struct breakpoint *b, *temp;
4051 ALL_BREAKPOINTS_SAFE (b, temp)
4052 if (b->type == bp_shlib_event)
4053 delete_breakpoint (b);
4057 create_solib_event_breakpoint (CORE_ADDR address)
4059 struct breakpoint *b;
4060 struct symtab_and_line sal;
4062 INIT_SAL (&sal); /* initialize to zeroes */
4064 sal.section = find_pc_overlay (sal.pc);
4065 b = set_raw_breakpoint (sal, bp_shlib_event);
4066 b->number = internal_breakpoint_number--;
4067 b->disposition = donttouch;
4072 /* Disable any breakpoints that are on code in shared libraries. Only
4073 apply to enabled breakpoints, disabled ones can just stay disabled. */
4076 disable_breakpoints_in_shlibs (int silent)
4078 struct breakpoint *b;
4079 int disabled_shlib_breaks = 0;
4081 /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
4084 #if defined (PC_SOLIB)
4085 if (((b->type == bp_breakpoint) ||
4086 (b->type == bp_hardware_breakpoint)) &&
4087 b->enable == enabled &&
4089 PC_SOLIB (b->address))
4091 b->enable = shlib_disabled;
4094 if (!disabled_shlib_breaks)
4096 target_terminal_ours_for_output ();
4097 warning ("Temporarily disabling shared library breakpoints:");
4099 disabled_shlib_breaks = 1;
4100 warning ("breakpoint #%d ", b->number);
4107 /* Try to reenable any breakpoints in shared libraries. */
4109 re_enable_breakpoints_in_shlibs (void)
4111 struct breakpoint *b;
4114 if (b->enable == shlib_disabled)
4118 /* Do not reenable the breakpoint if the shared library
4119 is still not mapped in. */
4120 if (target_read_memory (b->address, buf, 1) == 0)
4121 b->enable = enabled;
4128 solib_load_unload_1 (char *hookname, int tempflag, char *dll_pathname,
4129 char *cond_string, enum bptype bp_kind)
4131 struct breakpoint *b;
4132 struct symtabs_and_lines sals;
4133 struct cleanup *old_chain;
4134 struct cleanup *canonical_strings_chain = NULL;
4135 char *addr_start = hookname;
4136 char *addr_end = NULL;
4137 char **canonical = (char **) NULL;
4138 int thread = -1; /* All threads. */
4140 /* Set a breakpoint on the specified hook. */
4141 sals = decode_line_1 (&hookname, 1, (struct symtab *) NULL, 0, &canonical);
4142 addr_end = hookname;
4144 if (sals.nelts == 0)
4146 warning ("Unable to set a breakpoint on dynamic linker callback.");
4147 warning ("Suggest linking with /opt/langtools/lib/end.o.");
4148 warning ("GDB will be unable to track shl_load/shl_unload calls");
4151 if (sals.nelts != 1)
4153 warning ("Unable to set unique breakpoint on dynamic linker callback.");
4154 warning ("GDB will be unable to track shl_load/shl_unload calls");
4158 /* Make sure that all storage allocated in decode_line_1 gets freed
4159 in case the following errors out. */
4160 old_chain = make_cleanup (xfree, sals.sals);
4161 if (canonical != (char **) NULL)
4163 make_cleanup (xfree, canonical);
4164 canonical_strings_chain = make_cleanup (null_cleanup, 0);
4165 if (canonical[0] != NULL)
4166 make_cleanup (xfree, canonical[0]);
4169 resolve_sal_pc (&sals.sals[0]);
4171 /* Remove the canonical strings from the cleanup, they are needed below. */
4172 if (canonical != (char **) NULL)
4173 discard_cleanups (canonical_strings_chain);
4175 b = set_raw_breakpoint (sals.sals[0], bp_kind);
4176 set_breakpoint_count (breakpoint_count + 1);
4177 b->number = breakpoint_count;
4179 b->cond_string = (cond_string == NULL) ?
4180 NULL : savestring (cond_string, strlen (cond_string));
4183 if (canonical != (char **) NULL && canonical[0] != NULL)
4184 b->addr_string = canonical[0];
4185 else if (addr_start)
4186 b->addr_string = savestring (addr_start, addr_end - addr_start);
4188 b->enable = enabled;
4189 b->disposition = tempflag ? del : donttouch;
4191 if (dll_pathname == NULL)
4192 b->dll_pathname = NULL;
4195 b->dll_pathname = (char *) xmalloc (strlen (dll_pathname) + 1);
4196 strcpy (b->dll_pathname, dll_pathname);
4200 do_cleanups (old_chain);
4204 create_solib_load_event_breakpoint (char *hookname, int tempflag,
4205 char *dll_pathname, char *cond_string)
4207 solib_load_unload_1 (hookname, tempflag, dll_pathname,
4208 cond_string, bp_catch_load);
4212 create_solib_unload_event_breakpoint (char *hookname, int tempflag,
4213 char *dll_pathname, char *cond_string)
4215 solib_load_unload_1 (hookname,tempflag, dll_pathname,
4216 cond_string, bp_catch_unload);
4220 create_fork_vfork_event_catchpoint (int tempflag, char *cond_string,
4221 enum bptype bp_kind)
4223 struct symtab_and_line sal;
4224 struct breakpoint *b;
4225 int thread = -1; /* All threads. */
4232 b = set_raw_breakpoint (sal, bp_kind);
4233 set_breakpoint_count (breakpoint_count + 1);
4234 b->number = breakpoint_count;
4236 b->cond_string = (cond_string == NULL) ?
4237 NULL : savestring (cond_string, strlen (cond_string));
4239 b->addr_string = NULL;
4240 b->enable = enabled;
4241 b->disposition = tempflag ? del : donttouch;
4242 b->forked_inferior_pid = 0;
4248 create_fork_event_catchpoint (int tempflag, char *cond_string)
4250 create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_fork);
4254 create_vfork_event_catchpoint (int tempflag, char *cond_string)
4256 create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_vfork);
4260 create_exec_event_catchpoint (int tempflag, char *cond_string)
4262 struct symtab_and_line sal;
4263 struct breakpoint *b;
4264 int thread = -1; /* All threads. */
4271 b = set_raw_breakpoint (sal, bp_catch_exec);
4272 set_breakpoint_count (breakpoint_count + 1);
4273 b->number = breakpoint_count;
4275 b->cond_string = (cond_string == NULL) ?
4276 NULL : savestring (cond_string, strlen (cond_string));
4278 b->addr_string = NULL;
4279 b->enable = enabled;
4280 b->disposition = tempflag ? del : donttouch;
4286 hw_breakpoint_used_count (void)
4288 register struct breakpoint *b;
4293 if (b->type == bp_hardware_breakpoint && b->enable == enabled)
4301 hw_watchpoint_used_count (enum bptype type, int *other_type_used)
4303 register struct breakpoint *b;
4306 *other_type_used = 0;
4309 if (b->enable == enabled)
4311 if (b->type == type)
4313 else if ((b->type == bp_hardware_watchpoint ||
4314 b->type == bp_read_watchpoint ||
4315 b->type == bp_access_watchpoint)
4316 && b->enable == enabled)
4317 *other_type_used = 1;
4323 /* Call this after hitting the longjmp() breakpoint. Use this to set
4324 a new breakpoint at the target of the jmp_buf.
4326 FIXME - This ought to be done by setting a temporary breakpoint
4327 that gets deleted automatically... */
4330 set_longjmp_resume_breakpoint (CORE_ADDR pc, struct frame_info *frame)
4332 register struct breakpoint *b;
4335 if (b->type == bp_longjmp_resume)
4338 b->enable = enabled;
4340 b->frame = frame->frame;
4343 check_duplicates (b);
4349 disable_watchpoints_before_interactive_call_start (void)
4351 struct breakpoint *b;
4355 if (((b->type == bp_watchpoint)
4356 || (b->type == bp_hardware_watchpoint)
4357 || (b->type == bp_read_watchpoint)
4358 || (b->type == bp_access_watchpoint)
4359 || ep_is_exception_catchpoint (b))
4360 && (b->enable == enabled))
4362 b->enable = call_disabled;
4363 check_duplicates (b);
4369 enable_watchpoints_after_interactive_call_stop (void)
4371 struct breakpoint *b;
4375 if (((b->type == bp_watchpoint)
4376 || (b->type == bp_hardware_watchpoint)
4377 || (b->type == bp_read_watchpoint)
4378 || (b->type == bp_access_watchpoint)
4379 || ep_is_exception_catchpoint (b))
4380 && (b->enable == call_disabled))
4382 b->enable = enabled;
4383 check_duplicates (b);
4389 /* Set a breakpoint that will evaporate an end of command
4390 at address specified by SAL.
4391 Restrict it to frame FRAME if FRAME is nonzero. */
4394 set_momentary_breakpoint (struct symtab_and_line sal, struct frame_info *frame,
4397 register struct breakpoint *b;
4398 b = set_raw_breakpoint (sal, type);
4399 b->enable = enabled;
4400 b->disposition = donttouch;
4401 b->frame = (frame ? frame->frame : 0);
4403 /* If we're debugging a multi-threaded program, then we
4404 want momentary breakpoints to be active in only a
4405 single thread of control. */
4406 if (in_thread_list (inferior_ptid))
4407 b->thread = pid_to_thread_id (inferior_ptid);
4413 /* Tell the user we have just set a breakpoint B. */
4416 mention (struct breakpoint *b)
4420 struct cleanup *old_chain;
4421 struct ui_stream *stb;
4423 stb = ui_out_stream_new (uiout);
4424 old_chain = make_cleanup_ui_out_stream_delete (stb);
4427 /* FIXME: This is misplaced; mention() is called by things (like hitting a
4428 watchpoint) other than breakpoint creation. It should be possible to
4429 clean this up and at the same time replace the random calls to
4430 breakpoint_changed with this hook, as has already been done for
4431 delete_breakpoint_hook and so on. */
4432 if (create_breakpoint_hook)
4433 create_breakpoint_hook (b);
4434 breakpoint_create_event (b->number);
4439 printf_filtered ("(apparently deleted?) Eventpoint %d: ", b->number);
4443 ui_out_text (uiout, "Watchpoint ");
4444 ui_out_tuple_begin (uiout, "wpt");
4445 ui_out_field_int (uiout, "number", b->number);
4446 ui_out_text (uiout, ": ");
4447 print_expression (b->exp, stb->stream);
4448 ui_out_field_stream (uiout, "exp", stb);
4449 ui_out_tuple_end (uiout);
4451 case bp_hardware_watchpoint:
4452 ui_out_text (uiout, "Hardware watchpoint ");
4453 ui_out_tuple_begin (uiout, "wpt");
4454 ui_out_field_int (uiout, "number", b->number);
4455 ui_out_text (uiout, ": ");
4456 print_expression (b->exp, stb->stream);
4457 ui_out_field_stream (uiout, "exp", stb);
4458 ui_out_tuple_end (uiout);
4462 printf_filtered ("Watchpoint %d: ", b->number);
4463 print_expression (b->exp, gdb_stdout);
4465 case bp_hardware_watchpoint:
4466 printf_filtered ("Hardware watchpoint %d: ", b->number);
4467 print_expression (b->exp, gdb_stdout);
4471 case bp_read_watchpoint:
4472 ui_out_text (uiout, "Hardware read watchpoint ");
4473 ui_out_tuple_begin (uiout, "hw-rwpt");
4474 ui_out_field_int (uiout, "number", b->number);
4475 ui_out_text (uiout, ": ");
4476 print_expression (b->exp, stb->stream);
4477 ui_out_field_stream (uiout, "exp", stb);
4478 ui_out_tuple_end (uiout);
4480 case bp_access_watchpoint:
4481 ui_out_text (uiout, "Hardware access (read/write) watchpoint ");
4482 ui_out_tuple_begin (uiout, "hw-awpt");
4483 ui_out_field_int (uiout, "number", b->number);
4484 ui_out_text (uiout, ": ");
4485 print_expression (b->exp, stb->stream);
4486 ui_out_field_stream (uiout, "exp", stb);
4487 ui_out_tuple_end (uiout);
4490 case bp_read_watchpoint:
4491 printf_filtered ("Hardware read watchpoint %d: ", b->number);
4492 print_expression (b->exp, gdb_stdout);
4494 case bp_access_watchpoint:
4495 printf_filtered ("Hardware access (read/write) watchpoint %d: ",
4497 print_expression (b->exp, gdb_stdout);
4502 if (interpreter_p && strncmp (interpreter_p, "mi", 2) == 0)
4508 printf_filtered ("Breakpoint %d", b->number);
4511 case bp_hardware_breakpoint:
4513 if (interpreter_p && strncmp (interpreter_p, "mi", 2) == 0)
4519 printf_filtered ("Hardware assisted breakpoint %d", b->number);
4523 case bp_catch_unload:
4524 printf_filtered ("Catchpoint %d (%s %s)",
4526 (b->type == bp_catch_load) ? "load" : "unload",
4527 (b->dll_pathname != NULL) ?
4528 b->dll_pathname : "<any library>");
4531 case bp_catch_vfork:
4532 printf_filtered ("Catchpoint %d (%s)",
4534 (b->type == bp_catch_fork) ? "fork" : "vfork");
4537 printf_filtered ("Catchpoint %d (exec)",
4540 case bp_catch_catch:
4541 case bp_catch_throw:
4542 printf_filtered ("Catchpoint %d (%s)",
4544 (b->type == bp_catch_catch) ? "catch" : "throw");
4550 case bp_longjmp_resume:
4551 case bp_step_resume:
4552 case bp_through_sigtramp:
4554 case bp_watchpoint_scope:
4555 case bp_shlib_event:
4556 case bp_thread_event:
4561 if (addressprint || b->source_file == NULL)
4563 printf_filtered (" at ");
4564 print_address_numeric (b->address, 1, gdb_stdout);
4567 printf_filtered (": file %s, line %d.",
4568 b->source_file, b->line_number);
4569 TUIDO (((TuiOpaqueFuncPtr) tui_vAllSetHasBreakAt, b, 1));
4570 TUIDO (((TuiOpaqueFuncPtr) tuiUpdateAllExecInfos));
4573 do_cleanups (old_chain);
4576 if (interpreter_p && strncmp (interpreter_p, "mi", 2) == 0)
4579 printf_filtered ("\n");
4583 /* Add SALS.nelts breakpoints to the breakpoint table. For each
4584 SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
4585 COND[i] and COND_STRING[i] values.
4587 NOTE: If the function succeeds, the caller is expected to cleanup
4588 the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
4589 array contents). If the function fails (error() is called), the
4590 caller is expected to cleanups both the ADDR_STRING, COND_STRING,
4591 COND and SALS arrays and each of those arrays contents. */
4594 create_breakpoints (struct symtabs_and_lines sals, char **addr_string,
4595 struct expression **cond, char **cond_string,
4596 enum bptype type, enum bpdisp disposition,
4597 int thread, int ignore_count, int from_tty)
4599 if (type == bp_hardware_breakpoint)
4601 int i = hw_breakpoint_used_count ();
4602 int target_resources_ok =
4603 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint,
4605 if (target_resources_ok == 0)
4606 error ("No hardware breakpoint support in the target.");
4607 else if (target_resources_ok < 0)
4608 error ("Hardware breakpoints used exceeds limit.");
4611 /* Now set all the breakpoints. */
4614 for (i = 0; i < sals.nelts; i++)
4616 struct breakpoint *b;
4617 struct symtab_and_line sal = sals.sals[i];
4620 describe_other_breakpoints (sal.pc, sal.section);
4622 b = set_raw_breakpoint (sal, type);
4623 set_breakpoint_count (breakpoint_count + 1);
4624 b->number = breakpoint_count;
4627 b->addr_string = addr_string[i];
4628 b->cond_string = cond_string[i];
4629 b->ignore_count = ignore_count;
4630 b->enable = enabled;
4631 b->disposition = disposition;
4637 /* Parse ARG which is assumed to be a SAL specification possibly
4638 followed by conditionals. On return, SALS contains an array of SAL
4639 addresses found. ADDR_STRING contains a vector of (canonical)
4640 address strings. ARG points to the end of the SAL. */
4643 parse_breakpoint_sals (char **address,
4644 struct symtabs_and_lines *sals,
4645 char ***addr_string)
4647 char *addr_start = *address;
4648 *addr_string = NULL;
4649 /* If no arg given, or if first arg is 'if ', use the default
4651 if ((*address) == NULL
4652 || (strncmp ((*address), "if", 2) == 0 && isspace ((*address)[2])))
4654 if (default_breakpoint_valid)
4656 struct symtab_and_line sal;
4657 INIT_SAL (&sal); /* initialize to zeroes */
4658 sals->sals = (struct symtab_and_line *)
4659 xmalloc (sizeof (struct symtab_and_line));
4660 sal.pc = default_breakpoint_address;
4661 sal.line = default_breakpoint_line;
4662 sal.symtab = default_breakpoint_symtab;
4663 sal.section = find_pc_overlay (sal.pc);
4664 sals->sals[0] = sal;
4668 error ("No default breakpoint address now.");
4672 /* Force almost all breakpoints to be in terms of the
4673 current_source_symtab (which is decode_line_1's default). This
4674 should produce the results we want almost all of the time while
4675 leaving default_breakpoint_* alone. */
4676 if (default_breakpoint_valid
4677 && (!current_source_symtab
4678 || (strchr ("+-", (*address)[0]) != NULL)))
4679 *sals = decode_line_1 (address, 1, default_breakpoint_symtab,
4680 default_breakpoint_line, addr_string);
4682 *sals = decode_line_1 (address, 1, (struct symtab *) NULL, 0, addr_string);
4684 /* For any SAL that didn't have a canonical string, fill one in. */
4685 if (sals->nelts > 0 && *addr_string == NULL)
4686 *addr_string = xcalloc (sals->nelts, sizeof (char **));
4687 if (addr_start != (*address))
4690 for (i = 0; i < sals->nelts; i++)
4692 /* Add the string if not present. */
4693 if ((*addr_string)[i] == NULL)
4694 (*addr_string)[i] = savestring (addr_start, (*address) - addr_start);
4700 /* Convert each SAL into a real PC. Verify that the PC can be
4701 inserted as a breakpoint. If it can't throw an error. */
4704 breakpoint_sals_to_pc (struct symtabs_and_lines *sals,
4708 for (i = 0; i < sals->nelts; i++)
4710 resolve_sal_pc (&sals->sals[i]);
4712 /* It's possible for the PC to be nonzero, but still an illegal
4713 value on some targets.
4715 For example, on HP-UX if you start gdb, and before running the
4716 inferior you try to set a breakpoint on a shared library function
4717 "foo" where the inferior doesn't call "foo" directly but does
4718 pass its address to another function call, then we do find a
4719 minimal symbol for the "foo", but it's address is invalid.
4720 (Appears to be an index into a table that the loader sets up
4721 when the inferior is run.)
4723 Give the target a chance to bless sals.sals[i].pc before we
4724 try to make a breakpoint for it. */
4725 if (PC_REQUIRES_RUN_BEFORE_USE (sals->sals[i].pc))
4727 if (address == NULL)
4728 error ("Cannot break without a running program.");
4730 error ("Cannot break on %s without a running program.",
4736 /* Set a breakpoint according to ARG (function, linenum or *address)
4737 flag: first bit : 0 non-temporary, 1 temporary.
4738 second bit : 0 normal breakpoint, 1 hardware breakpoint. */
4741 break_command_1 (char *arg, int flag, int from_tty)
4743 int tempflag, hardwareflag;
4744 struct symtabs_and_lines sals;
4745 register struct expression **cond = 0;
4746 /* Pointers in arg to the start, and one past the end, of the
4748 char **cond_string = (char **) NULL;
4749 char *addr_start = arg;
4751 struct cleanup *old_chain;
4752 struct cleanup *breakpoint_chain = NULL;
4755 int ignore_count = 0;
4757 hardwareflag = flag & BP_HARDWAREFLAG;
4758 tempflag = flag & BP_TEMPFLAG;
4763 parse_breakpoint_sals (&arg, &sals, &addr_string);
4768 /* Create a chain of things that always need to be cleaned up. */
4769 old_chain = make_cleanup (null_cleanup, 0);
4771 /* Make sure that all storage allocated to SALS gets freed. */
4772 make_cleanup (xfree, sals.sals);
4774 /* Cleanup the addr_string array but not its contents. */
4775 make_cleanup (xfree, addr_string);
4777 /* Allocate space for all the cond expressions. */
4778 cond = xcalloc (sals.nelts, sizeof (struct expression *));
4779 make_cleanup (xfree, cond);
4781 /* Allocate space for all the cond strings. */
4782 cond_string = xcalloc (sals.nelts, sizeof (char **));
4783 make_cleanup (xfree, cond_string);
4785 /* ----------------------------- SNIP -----------------------------
4786 Anything added to the cleanup chain beyond this point is assumed
4787 to be part of a breakpoint. If the breakpoint create succeeds
4788 then the memory is not reclaimed. */
4789 breakpoint_chain = make_cleanup (null_cleanup, 0);
4791 /* Mark the contents of the addr_string for cleanup. These go on
4792 the breakpoint_chain and only occure if the breakpoint create
4794 for (i = 0; i < sals.nelts; i++)
4796 if (addr_string[i] != NULL)
4797 make_cleanup (xfree, addr_string[i]);
4800 /* Resolve all line numbers to PC's and verify that the addresses
4801 are ok for the target. */
4802 breakpoint_sals_to_pc (&sals, addr_start);
4804 /* Verify that condition can be parsed, before setting any
4805 breakpoints. Allocate a separate condition expression for each
4807 thread = -1; /* No specific thread yet */
4808 for (i = 0; i < sals.nelts; i++)
4815 char *cond_start = NULL;
4816 char *cond_end = NULL;
4817 while (*tok == ' ' || *tok == '\t')
4822 while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
4825 toklen = end_tok - tok;
4827 if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
4829 tok = cond_start = end_tok + 1;
4830 cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0);
4831 make_cleanup (xfree, cond[i]);
4833 cond_string[i] = savestring (cond_start, cond_end - cond_start);
4834 make_cleanup (xfree, cond_string[i]);
4836 else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0)
4842 thread = strtol (tok, &tok, 0);
4844 error ("Junk after thread keyword.");
4845 if (!valid_thread_id (thread))
4846 error ("Unknown thread %d\n", thread);
4849 error ("Junk at end of arguments.");
4853 create_breakpoints (sals, addr_string, cond, cond_string,
4854 hardwareflag ? bp_hardware_breakpoint : bp_breakpoint,
4855 tempflag ? del : donttouch,
4856 thread, ignore_count, from_tty);
4860 warning ("Multiple breakpoints were set.");
4861 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
4863 /* That's it. Discard the cleanups for data inserted into the
4865 discard_cleanups (breakpoint_chain);
4866 /* But cleanup everything else. */
4867 do_cleanups (old_chain);
4870 /* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
4871 linenum or *address) with COND and IGNORE_COUNT. */
4873 struct captured_breakpoint_args
4884 do_captured_breakpoint (void *data)
4886 struct captured_breakpoint_args *args = data;
4887 struct symtabs_and_lines sals;
4888 register struct expression **cond;
4889 struct cleanup *old_chain;
4890 struct cleanup *breakpoint_chain = NULL;
4897 /* Parse the source and lines spec. Delay check that the expression
4898 didn't contain trailing garbage until after cleanups are in
4902 address_end = args->address;
4904 parse_breakpoint_sals (&address_end, &sals, &addr_string);
4909 /* Create a chain of things at always need to be cleaned up. */
4910 old_chain = make_cleanup (null_cleanup, 0);
4912 /* Always have a addr_string array, even if it is empty. */
4913 make_cleanup (xfree, addr_string);
4915 /* Make sure that all storage allocated to SALS gets freed. */
4916 make_cleanup (xfree, sals.sals);
4918 /* Allocate space for all the cond expressions. */
4919 cond = xcalloc (sals.nelts, sizeof (struct expression *));
4920 make_cleanup (xfree, cond);
4922 /* Allocate space for all the cond strings. */
4923 cond_string = xcalloc (sals.nelts, sizeof (char **));
4924 make_cleanup (xfree, cond_string);
4926 /* ----------------------------- SNIP -----------------------------
4927 Anything added to the cleanup chain beyond this point is assumed
4928 to be part of a breakpoint. If the breakpoint create goes
4929 through then that memory is not cleaned up. */
4930 breakpoint_chain = make_cleanup (null_cleanup, 0);
4932 /* Mark the contents of the addr_string for cleanup. These go on
4933 the breakpoint_chain and only occure if the breakpoint create
4935 for (i = 0; i < sals.nelts; i++)
4937 if (addr_string[i] != NULL)
4938 make_cleanup (xfree, addr_string[i]);
4941 /* Wait until now before checking for garbage at the end of the
4942 address. That way cleanups can take care of freeing any
4944 if (*address_end != '\0')
4945 error ("Garbage %s following breakpoint address", address_end);
4947 /* Resolve all line numbers to PC's. */
4948 breakpoint_sals_to_pc (&sals, args->address);
4950 /* Verify that conditions can be parsed, before setting any
4952 for (i = 0; i < sals.nelts; i++)
4954 if (args->condition != NULL)
4956 char *tok = args->condition;
4957 cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0);
4959 error ("Garbage %s follows condition", tok);
4960 make_cleanup (xfree, cond[i]);
4961 cond_string[i] = xstrdup (args->condition);
4965 create_breakpoints (sals, addr_string, cond, cond_string,
4966 args->hardwareflag ? bp_hardware_breakpoint : bp_breakpoint,
4967 args->tempflag ? del : donttouch,
4968 args->thread, args->ignore_count, 0/*from-tty*/);
4970 /* That's it. Discard the cleanups for data inserted into the
4972 discard_cleanups (breakpoint_chain);
4973 /* But cleanup everything else. */
4974 do_cleanups (old_chain);
4979 gdb_breakpoint (char *address, char *condition,
4980 int hardwareflag, int tempflag,
4981 int thread, int ignore_count)
4983 struct captured_breakpoint_args args;
4984 args.address = address;
4985 args.condition = condition;
4986 args.hardwareflag = hardwareflag;
4987 args.tempflag = tempflag;
4988 args.thread = thread;
4989 args.ignore_count = ignore_count;
4990 return catch_errors (do_captured_breakpoint, &args,
4991 NULL, RETURN_MASK_ALL);
4996 break_at_finish_at_depth_command_1 (char *arg, int flag, int from_tty)
4998 struct frame_info *frame;
4999 CORE_ADDR low, high, selected_pc = 0;
5000 char *extra_args = NULL;
5003 int extra_args_len = 0, if_arg = 0;
5006 (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t')))
5009 if (default_breakpoint_valid)
5013 selected_pc = selected_frame->pc;
5018 error ("No selected frame.");
5021 error ("No default breakpoint address now.");
5025 extra_args = strchr (arg, ' ');
5029 extra_args_len = strlen (extra_args);
5030 level_arg = (char *) xmalloc (extra_args - arg);
5031 strncpy (level_arg, arg, extra_args - arg - 1);
5032 level_arg[extra_args - arg - 1] = '\0';
5036 level_arg = (char *) xmalloc (strlen (arg) + 1);
5037 strcpy (level_arg, arg);
5040 frame = parse_frame_specification (level_arg);
5042 selected_pc = frame->pc;
5049 extra_args_len = strlen (arg);
5054 if (find_pc_partial_function (selected_pc, (char **) NULL, &low, &high))
5056 addr_string = (char *) xmalloc (26 + extra_args_len);
5058 sprintf (addr_string, "*0x%s %s", paddr_nz (high), extra_args);
5060 sprintf (addr_string, "*0x%s", paddr_nz (high));
5061 break_command_1 (addr_string, flag, from_tty);
5062 xfree (addr_string);
5065 error ("No function contains the specified address");
5068 error ("Unable to set breakpoint at procedure exit");
5073 break_at_finish_command_1 (char *arg, int flag, int from_tty)
5075 char *addr_string, *break_string, *beg_addr_string;
5076 CORE_ADDR low, high;
5077 struct symtabs_and_lines sals;
5078 struct symtab_and_line sal;
5079 struct cleanup *old_chain;
5080 char *extra_args = NULL;
5081 int extra_args_len = 0;
5085 (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t')))
5087 if (default_breakpoint_valid)
5091 addr_string = (char *) xmalloc (15);
5092 sprintf (addr_string, "*0x%s", paddr_nz (selected_frame->pc));
5097 error ("No selected frame.");
5100 error ("No default breakpoint address now.");
5104 addr_string = (char *) xmalloc (strlen (arg) + 1);
5105 strcpy (addr_string, arg);
5111 extra_args_len = strlen (arg);
5115 /* get the stuff after the function name or address */
5116 extra_args = strchr (arg, ' ');
5120 extra_args_len = strlen (extra_args);
5127 beg_addr_string = addr_string;
5128 sals = decode_line_1 (&addr_string, 1, (struct symtab *) NULL, 0,
5131 xfree (beg_addr_string);
5132 old_chain = make_cleanup (xfree, sals.sals);
5133 for (i = 0; (i < sals.nelts); i++)
5136 if (find_pc_partial_function (sal.pc, (char **) NULL, &low, &high))
5138 break_string = (char *) xmalloc (extra_args_len + 26);
5140 sprintf (break_string, "*0x%s %s", paddr_nz (high), extra_args);
5142 sprintf (break_string, "*0x%s", paddr_nz (high));
5143 break_command_1 (break_string, flag, from_tty);
5144 xfree (break_string);
5147 error ("No function contains the specified address");
5151 warning ("Multiple breakpoints were set.\n");
5152 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
5154 do_cleanups (old_chain);
5158 /* Helper function for break_command_1 and disassemble_command. */
5161 resolve_sal_pc (struct symtab_and_line *sal)
5165 if (sal->pc == 0 && sal->symtab != NULL)
5167 if (!find_line_pc (sal->symtab, sal->line, &pc))
5168 error ("No line %d in file \"%s\".",
5169 sal->line, sal->symtab->filename);
5173 if (sal->section == 0 && sal->symtab != NULL)
5175 struct blockvector *bv;
5180 bv = blockvector_for_pc_sect (sal->pc, 0, &index, sal->symtab);
5183 b = BLOCKVECTOR_BLOCK (bv, index);
5184 sym = block_function (b);
5187 fixup_symbol_section (sym, sal->symtab->objfile);
5188 sal->section = SYMBOL_BFD_SECTION (sym);
5192 /* It really is worthwhile to have the section, so we'll just
5193 have to look harder. This case can be executed if we have
5194 line numbers but no functions (as can happen in assembly
5197 struct minimal_symbol *msym;
5199 msym = lookup_minimal_symbol_by_pc (sal->pc);
5201 sal->section = SYMBOL_BFD_SECTION (msym);
5208 break_command (char *arg, int from_tty)
5210 break_command_1 (arg, 0, from_tty);
5214 break_at_finish_command (char *arg, int from_tty)
5216 break_at_finish_command_1 (arg, 0, from_tty);
5220 break_at_finish_at_depth_command (char *arg, int from_tty)
5222 break_at_finish_at_depth_command_1 (arg, 0, from_tty);
5226 tbreak_command (char *arg, int from_tty)
5228 break_command_1 (arg, BP_TEMPFLAG, from_tty);
5232 tbreak_at_finish_command (char *arg, int from_tty)
5234 break_at_finish_command_1 (arg, BP_TEMPFLAG, from_tty);
5238 hbreak_command (char *arg, int from_tty)
5240 break_command_1 (arg, BP_HARDWAREFLAG, from_tty);
5244 thbreak_command (char *arg, int from_tty)
5246 break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty);
5250 stop_command (char *arg, int from_tty)
5252 printf_filtered ("Specify the type of breakpoint to set.\n\
5253 Usage: stop in <function | address>\n\
5258 stopin_command (char *arg, int from_tty)
5262 if (arg == (char *) NULL)
5264 else if (*arg != '*')
5269 /* look for a ':'. If this is a line number specification, then
5270 say it is bad, otherwise, it should be an address or
5271 function/method name */
5272 while (*argptr && !hasColon)
5274 hasColon = (*argptr == ':');
5279 badInput = (*argptr != ':'); /* Not a class::method */
5281 badInput = isdigit (*arg); /* a simple line number */
5285 printf_filtered ("Usage: stop in <function | address>\n");
5287 break_command_1 (arg, 0, from_tty);
5291 stopat_command (char *arg, int from_tty)
5295 if (arg == (char *) NULL || *arg == '*') /* no line number */
5302 /* look for a ':'. If there is a '::' then get out, otherwise
5303 it is probably a line number. */
5304 while (*argptr && !hasColon)
5306 hasColon = (*argptr == ':');
5311 badInput = (*argptr == ':'); /* we have class::method */
5313 badInput = !isdigit (*arg); /* not a line number */
5317 printf_filtered ("Usage: stop at <line>\n");
5319 break_command_1 (arg, 0, from_tty);
5323 /* accessflag: hw_write: watch write,
5324 hw_read: watch read,
5325 hw_access: watch access (read or write) */
5327 watch_command_1 (char *arg, int accessflag, int from_tty)
5329 struct breakpoint *b;
5330 struct symtab_and_line sal;
5331 struct expression *exp;
5332 struct block *exp_valid_block;
5333 struct value *val, *mark;
5334 struct frame_info *frame;
5335 struct frame_info *prev_frame = NULL;
5336 char *exp_start = NULL;
5337 char *exp_end = NULL;
5338 char *tok, *end_tok;
5340 char *cond_start = NULL;
5341 char *cond_end = NULL;
5342 struct expression *cond = NULL;
5343 int i, other_type_used, target_resources_ok = 0;
5344 enum bptype bp_type;
5347 INIT_SAL (&sal); /* initialize to zeroes */
5349 /* Parse arguments. */
5350 innermost_block = NULL;
5352 exp = parse_exp_1 (&arg, 0, 0);
5354 exp_valid_block = innermost_block;
5355 mark = value_mark ();
5356 val = evaluate_expression (exp);
5357 release_value (val);
5358 if (VALUE_LAZY (val))
5359 value_fetch_lazy (val);
5362 while (*tok == ' ' || *tok == '\t')
5366 while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
5369 toklen = end_tok - tok;
5370 if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
5372 tok = cond_start = end_tok + 1;
5373 cond = parse_exp_1 (&tok, 0, 0);
5377 error ("Junk at end of command.");
5379 if (accessflag == hw_read)
5380 bp_type = bp_read_watchpoint;
5381 else if (accessflag == hw_access)
5382 bp_type = bp_access_watchpoint;
5384 bp_type = bp_hardware_watchpoint;
5386 mem_cnt = can_use_hardware_watchpoint (val);
5387 if (mem_cnt == 0 && bp_type != bp_hardware_watchpoint)
5388 error ("Expression cannot be implemented with read/access watchpoint.");
5391 i = hw_watchpoint_used_count (bp_type, &other_type_used);
5392 target_resources_ok =
5393 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type, i + mem_cnt,
5395 if (target_resources_ok == 0 && bp_type != bp_hardware_watchpoint)
5396 error ("Target does not support this type of hardware watchpoint.");
5398 if (target_resources_ok < 0 && bp_type != bp_hardware_watchpoint)
5399 error ("Target can only support one kind of HW watchpoint at a time.");
5402 #if defined(HPUXHPPA)
5403 /* On HP-UX if you set a h/w
5404 watchpoint before the "run" command, the inferior dies with a e.g.,
5405 SIGILL once you start it. I initially believed this was due to a
5406 bad interaction between page protection traps and the initial
5407 startup sequence by the dynamic linker.
5409 However, I tried avoiding that by having HP-UX's implementation of
5410 TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
5411 yet, which forced slow watches before a "run" or "attach", and it
5412 still fails somewhere in the startup code.
5414 Until I figure out what's happening, I'm disallowing watches altogether
5415 before the "run" or "attach" command. We'll tell the user they must
5416 set watches after getting the program started. */
5417 if (!target_has_execution)
5419 warning ("can't do that without a running program; try \"break main\", \"run\" first");
5422 #endif /* HPUXHPPA */
5424 /* Change the type of breakpoint to an ordinary watchpoint if a hardware
5425 watchpoint could not be set. */
5426 if (!mem_cnt || target_resources_ok <= 0)
5427 bp_type = bp_watchpoint;
5429 /* Now set up the breakpoint. */
5430 b = set_raw_breakpoint (sal, bp_type);
5431 set_breakpoint_count (breakpoint_count + 1);
5432 b->number = breakpoint_count;
5433 b->disposition = donttouch;
5435 b->exp_valid_block = exp_valid_block;
5436 b->exp_string = savestring (exp_start, exp_end - exp_start);
5440 b->cond_string = savestring (cond_start, cond_end - cond_start);
5444 frame = block_innermost_frame (exp_valid_block);
5447 prev_frame = get_prev_frame (frame);
5448 b->watchpoint_frame = frame->frame;
5451 b->watchpoint_frame = (CORE_ADDR) 0;
5453 /* If the expression is "local", then set up a "watchpoint scope"
5454 breakpoint at the point where we've left the scope of the watchpoint
5456 if (innermost_block)
5460 struct breakpoint *scope_breakpoint;
5461 struct symtab_and_line scope_sal;
5463 INIT_SAL (&scope_sal); /* initialize to zeroes */
5464 scope_sal.pc = get_frame_pc (prev_frame);
5465 scope_sal.section = find_pc_overlay (scope_sal.pc);
5467 scope_breakpoint = set_raw_breakpoint (scope_sal,
5468 bp_watchpoint_scope);
5469 set_breakpoint_count (breakpoint_count + 1);
5470 scope_breakpoint->number = breakpoint_count;
5472 scope_breakpoint->enable = enabled;
5474 /* Automatically delete the breakpoint when it hits. */
5475 scope_breakpoint->disposition = del;
5477 /* Only break in the proper frame (help with recursion). */
5478 scope_breakpoint->frame = prev_frame->frame;
5480 /* Set the address at which we will stop. */
5481 scope_breakpoint->address = get_frame_pc (prev_frame);
5483 /* The scope breakpoint is related to the watchpoint. We
5484 will need to act on them together. */
5485 b->related_breakpoint = scope_breakpoint;
5488 value_free_to_mark (mark);
5492 /* Return count of locations need to be watched and can be handled
5493 in hardware. If the watchpoint can not be handled
5494 in hardware return zero. */
5496 #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
5497 #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
5498 ((BYTE_SIZE) <= (REGISTER_SIZE))
5501 #if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
5502 #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
5503 (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
5507 can_use_hardware_watchpoint (struct value *v)
5509 int found_memory_cnt = 0;
5510 struct value *head = v;
5512 /* Did the user specifically forbid us to use hardware watchpoints? */
5513 if (!can_use_hw_watchpoints)
5516 /* Make sure that the value of the expression depends only upon
5517 memory contents, and values computed from them within GDB. If we
5518 find any register references or function calls, we can't use a
5519 hardware watchpoint.
5521 The idea here is that evaluating an expression generates a series
5522 of values, one holding the value of every subexpression. (The
5523 expression a*b+c has five subexpressions: a, b, a*b, c, and
5524 a*b+c.) GDB's values hold almost enough information to establish
5525 the criteria given above --- they identify memory lvalues,
5526 register lvalues, computed values, etcetera. So we can evaluate
5527 the expression, and then scan the chain of values that leaves
5528 behind to decide whether we can detect any possible change to the
5529 expression's final value using only hardware watchpoints.
5531 However, I don't think that the values returned by inferior
5532 function calls are special in any way. So this function may not
5533 notice that an expression involving an inferior function call
5534 can't be watched with hardware watchpoints. FIXME. */
5535 for (; v; v = v->next)
5537 if (VALUE_LVAL (v) == lval_memory)
5540 /* A lazy memory lvalue is one that GDB never needed to fetch;
5541 we either just used its address (e.g., `a' in `a.b') or
5542 we never needed it at all (e.g., `a' in `a,b'). */
5546 /* Ahh, memory we actually used! Check if we can cover
5547 it with hardware watchpoints. */
5548 struct type *vtype = check_typedef (VALUE_TYPE (v));
5550 /* We only watch structs and arrays if user asked for it
5551 explicitly, never if they just happen to appear in a
5552 middle of some value chain. */
5554 || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
5555 && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
5557 CORE_ADDR vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
5558 int len = TYPE_LENGTH (VALUE_TYPE (v));
5560 if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr, len))
5567 else if (v->lval != not_lval && v->modifiable == 0)
5568 return 0; /* ??? What does this represent? */
5569 else if (v->lval == lval_register)
5570 return 0; /* cannot watch a register with a HW watchpoint */
5573 /* The expression itself looks suitable for using a hardware
5574 watchpoint, but give the target machine a chance to reject it. */
5575 return found_memory_cnt;
5580 watch_command_wrapper (char *arg, int from_tty)
5582 watch_command (arg, from_tty);
5586 watch_command (char *arg, int from_tty)
5588 watch_command_1 (arg, hw_write, from_tty);
5593 rwatch_command_wrapper (char *arg, int from_tty)
5595 rwatch_command (arg, from_tty);
5599 rwatch_command (char *arg, int from_tty)
5601 watch_command_1 (arg, hw_read, from_tty);
5606 awatch_command_wrapper (char *arg, int from_tty)
5608 awatch_command (arg, from_tty);
5612 awatch_command (char *arg, int from_tty)
5614 watch_command_1 (arg, hw_access, from_tty);
5618 /* Helper routines for the until_command routine in infcmd.c. Here
5619 because it uses the mechanisms of breakpoints. */
5621 /* This function is called by fetch_inferior_event via the
5622 cmd_continuation pointer, to complete the until command. It takes
5623 care of cleaning up the temporary breakpoints set up by the until
5626 until_break_command_continuation (struct continuation_arg *arg)
5628 struct cleanup *cleanups;
5630 cleanups = (struct cleanup *) arg->data.pointer;
5631 do_exec_cleanups (cleanups);
5636 until_break_command (char *arg, int from_tty)
5638 struct symtabs_and_lines sals;
5639 struct symtab_and_line sal;
5640 struct frame_info *prev_frame = get_prev_frame (selected_frame);
5641 struct breakpoint *breakpoint;
5642 struct cleanup *old_chain;
5643 struct continuation_arg *arg1;
5646 clear_proceed_status ();
5648 /* Set a breakpoint where the user wants it and at return from
5651 if (default_breakpoint_valid)
5652 sals = decode_line_1 (&arg, 1, default_breakpoint_symtab,
5653 default_breakpoint_line, (char ***) NULL);
5655 sals = decode_line_1 (&arg, 1, (struct symtab *) NULL,
5656 0, (char ***) NULL);
5658 if (sals.nelts != 1)
5659 error ("Couldn't get information on specified line.");
5662 xfree (sals.sals); /* malloc'd, so freed */
5665 error ("Junk at end of arguments.");
5667 resolve_sal_pc (&sal);
5669 breakpoint = set_momentary_breakpoint (sal, selected_frame, bp_until);
5671 if (!event_loop_p || !target_can_async_p ())
5672 old_chain = make_cleanup_delete_breakpoint (breakpoint);
5674 old_chain = make_exec_cleanup_delete_breakpoint (breakpoint);
5676 /* If we are running asynchronously, and the target supports async
5677 execution, we are not waiting for the target to stop, in the call
5678 tp proceed, below. This means that we cannot delete the
5679 brekpoints until the target has actually stopped. The only place
5680 where we get a chance to do that is in fetch_inferior_event, so
5681 we must set things up for that. */
5683 if (event_loop_p && target_can_async_p ())
5685 /* In this case the arg for the continuation is just the point
5686 in the exec_cleanups chain from where to start doing
5687 cleanups, because all the continuation does is the cleanups in
5688 the exec_cleanup_chain. */
5690 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
5692 arg1->data.pointer = old_chain;
5694 add_continuation (until_break_command_continuation, arg1);
5697 /* Keep within the current frame */
5701 sal = find_pc_line (prev_frame->pc, 0);
5702 sal.pc = prev_frame->pc;
5703 breakpoint = set_momentary_breakpoint (sal, prev_frame, bp_until);
5704 if (!event_loop_p || !target_can_async_p ())
5705 make_cleanup_delete_breakpoint (breakpoint);
5707 make_exec_cleanup_delete_breakpoint (breakpoint);
5710 proceed (-1, TARGET_SIGNAL_DEFAULT, 0);
5711 /* Do the cleanups now, anly if we are not running asynchronously,
5712 of if we are, but the target is still synchronous. */
5713 if (!event_loop_p || !target_can_async_p ())
5714 do_cleanups (old_chain);
5718 /* These aren't used; I don't konw what they were for. */
5719 /* Set a breakpoint at the catch clause for NAME. */
5721 catch_breakpoint (char *name)
5726 disable_catch_breakpoint (void)
5731 delete_catch_breakpoint (void)
5736 enable_catch_breakpoint (void)
5743 struct sal_chain *next;
5744 struct symtab_and_line sal;
5748 /* Not really used -- invocation in handle_gnu_4_16_catch_command
5749 had been commented out in the v.4.16 sources, and stays
5750 disabled there now because "catch NAME" syntax isn't allowed.
5752 /* This isn't used; I don't know what it was for. */
5753 /* For each catch clause identified in ARGS, run FUNCTION
5754 with that clause as an argument. */
5755 static struct symtabs_and_lines
5756 map_catch_names (char *args, int (*function) ())
5758 register char *p = args;
5760 struct symtabs_and_lines sals;
5762 struct sal_chain *sal_chain = 0;
5766 error_no_arg ("one or more catch names");
5774 /* Don't swallow conditional part. */
5775 if (p1[0] == 'i' && p1[1] == 'f'
5776 && (p1[2] == ' ' || p1[2] == '\t'))
5782 while (isalnum (*p1) || *p1 == '_' || *p1 == '$')
5786 if (*p1 && *p1 != ' ' && *p1 != '\t')
5787 error ("Arguments must be catch names.");
5793 struct sal_chain *next = (struct sal_chain *)
5794 alloca (sizeof (struct sal_chain));
5795 next->next = sal_chain;
5796 next->sal = get_catch_sal (p);
5801 printf_unfiltered ("No catch clause for exception %s.\n", p);
5806 while (*p == ' ' || *p == '\t')
5812 /* This shares a lot of code with `print_frame_label_vars' from stack.c. */
5814 static struct symtabs_and_lines
5815 get_catch_sals (int this_level_only)
5817 register struct blockvector *bl;
5818 register struct block *block;
5819 int index, have_default = 0;
5821 struct symtabs_and_lines sals;
5822 struct sal_chain *sal_chain = 0;
5823 char *blocks_searched;
5825 /* Not sure whether an error message is always the correct response,
5826 but it's better than a core dump. */
5827 if (selected_frame == NULL)
5828 error ("No selected frame.");
5829 block = get_frame_block (selected_frame);
5830 pc = selected_frame->pc;
5836 error ("No symbol table info available.\n");
5838 bl = blockvector_for_pc (BLOCK_END (block) - 4, &index);
5839 blocks_searched = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
5840 memset (blocks_searched, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
5844 CORE_ADDR end = BLOCK_END (block) - 4;
5847 if (bl != blockvector_for_pc (end, &index))
5848 error ("blockvector blotch");
5849 if (BLOCKVECTOR_BLOCK (bl, index) != block)
5850 error ("blockvector botch");
5851 last_index = BLOCKVECTOR_NBLOCKS (bl);
5854 /* Don't print out blocks that have gone by. */
5855 while (index < last_index
5856 && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc)
5859 while (index < last_index
5860 && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end)
5862 if (blocks_searched[index] == 0)
5864 struct block *b = BLOCKVECTOR_BLOCK (bl, index);
5867 register struct symbol *sym;
5869 nsyms = BLOCK_NSYMS (b);
5871 for (i = 0; i < nsyms; i++)
5873 sym = BLOCK_SYM (b, i);
5874 if (STREQ (SYMBOL_NAME (sym), "default"))
5880 if (SYMBOL_CLASS (sym) == LOC_LABEL)
5882 struct sal_chain *next = (struct sal_chain *)
5883 alloca (sizeof (struct sal_chain));
5884 next->next = sal_chain;
5885 next->sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym),
5890 blocks_searched[index] = 1;
5896 if (sal_chain && this_level_only)
5899 /* After handling the function's top-level block, stop.
5900 Don't continue to its superblock, the block of
5901 per-file symbols. */
5902 if (BLOCK_FUNCTION (block))
5904 block = BLOCK_SUPERBLOCK (block);
5909 struct sal_chain *tmp_chain;
5911 /* Count the number of entries. */
5912 for (index = 0, tmp_chain = sal_chain; tmp_chain;
5913 tmp_chain = tmp_chain->next)
5917 sals.sals = (struct symtab_and_line *)
5918 xmalloc (index * sizeof (struct symtab_and_line));
5919 for (index = 0; sal_chain; sal_chain = sal_chain->next, index++)
5920 sals.sals[index] = sal_chain->sal;
5927 ep_skip_leading_whitespace (char **s)
5929 if ((s == NULL) || (*s == NULL))
5931 while (isspace (**s))
5935 /* This function examines a string, and attempts to find a token
5936 that might be an event name in the leading characters. If a
5937 possible match is found, a pointer to the last character of
5938 the token is returned. Else, NULL is returned. */
5941 ep_find_event_name_end (char *arg)
5944 char *event_name_end = NULL;
5946 /* If we could depend upon the presense of strrpbrk, we'd use that... */
5950 /* We break out of the loop when we find a token delimiter.
5951 Basically, we're looking for alphanumerics and underscores;
5952 anything else delimites the token. */
5955 if (!isalnum (*s) && (*s != '_'))
5961 return event_name_end;
5965 /* This function attempts to parse an optional "if <cond>" clause
5966 from the arg string. If one is not found, it returns NULL.
5968 Else, it returns a pointer to the condition string. (It does not
5969 attempt to evaluate the string against a particular block.) And,
5970 it updates arg to point to the first character following the parsed
5971 if clause in the arg string. */
5974 ep_parse_optional_if_clause (char **arg)
5978 if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace ((*arg)[2]))
5981 /* Skip the "if" keyword. */
5984 /* Skip any extra leading whitespace, and record the start of the
5985 condition string. */
5986 ep_skip_leading_whitespace (arg);
5989 /* Assume that the condition occupies the remainder of the arg string. */
5990 (*arg) += strlen (cond_string);
5995 /* This function attempts to parse an optional filename from the arg
5996 string. If one is not found, it returns NULL.
5998 Else, it returns a pointer to the parsed filename. (This function
5999 makes no attempt to verify that a file of that name exists, or is
6000 accessible.) And, it updates arg to point to the first character
6001 following the parsed filename in the arg string.
6003 Note that clients needing to preserve the returned filename for
6004 future access should copy it to their own buffers. */
6006 ep_parse_optional_filename (char **arg)
6008 static char filename[1024];
6013 if ((*arg_p == '\0') || isspace (*arg_p))
6031 /* Commands to deal with catching events, such as signals, exceptions,
6032 process start/exit, etc. */
6036 catch_fork, catch_vfork
6040 #if defined(CHILD_INSERT_FORK_CATCHPOINT) || defined(CHILD_INSERT_VFORK_CATCHPOINT)
6041 static void catch_fork_command_1 (catch_fork_kind fork_kind,
6042 char *arg, int tempflag, int from_tty);
6045 catch_fork_command_1 (catch_fork_kind fork_kind, char *arg, int tempflag,
6048 char *cond_string = NULL;
6050 ep_skip_leading_whitespace (&arg);
6052 /* The allowed syntax is:
6054 catch [v]fork if <cond>
6056 First, check if there's an if clause. */
6057 cond_string = ep_parse_optional_if_clause (&arg);
6059 if ((*arg != '\0') && !isspace (*arg))
6060 error ("Junk at end of arguments.");
6062 /* If this target supports it, create a fork or vfork catchpoint
6063 and enable reporting of such events. */
6067 create_fork_event_catchpoint (tempflag, cond_string);
6070 create_vfork_event_catchpoint (tempflag, cond_string);
6073 error ("unsupported or unknown fork kind; cannot catch it");
6079 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6081 catch_exec_command_1 (char *arg, int tempflag, int from_tty)
6083 char *cond_string = NULL;
6085 ep_skip_leading_whitespace (&arg);
6087 /* The allowed syntax is:
6089 catch exec if <cond>
6091 First, check if there's an if clause. */
6092 cond_string = ep_parse_optional_if_clause (&arg);
6094 if ((*arg != '\0') && !isspace (*arg))
6095 error ("Junk at end of arguments.");
6097 /* If this target supports it, create an exec catchpoint
6098 and enable reporting of such events. */
6099 create_exec_event_catchpoint (tempflag, cond_string);
6103 #if defined(SOLIB_ADD)
6105 catch_load_command_1 (char *arg, int tempflag, int from_tty)
6107 char *dll_pathname = NULL;
6108 char *cond_string = NULL;
6110 ep_skip_leading_whitespace (&arg);
6112 /* The allowed syntax is:
6114 catch load if <cond>
6115 catch load <filename>
6116 catch load <filename> if <cond>
6118 The user is not allowed to specify the <filename> after an
6121 We'll ignore the pathological case of a file named "if".
6123 First, check if there's an if clause. If so, then there
6124 cannot be a filename. */
6125 cond_string = ep_parse_optional_if_clause (&arg);
6127 /* If there was an if clause, then there cannot be a filename.
6128 Else, there might be a filename and an if clause. */
6129 if (cond_string == NULL)
6131 dll_pathname = ep_parse_optional_filename (&arg);
6132 ep_skip_leading_whitespace (&arg);
6133 cond_string = ep_parse_optional_if_clause (&arg);
6136 if ((*arg != '\0') && !isspace (*arg))
6137 error ("Junk at end of arguments.");
6139 /* Create a load breakpoint that only triggers when a load of
6140 the specified dll (or any dll, if no pathname was specified)
6142 SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid), tempflag,
6143 dll_pathname, cond_string);
6147 catch_unload_command_1 (char *arg, int tempflag, int from_tty)
6149 char *dll_pathname = NULL;
6150 char *cond_string = NULL;
6152 ep_skip_leading_whitespace (&arg);
6154 /* The allowed syntax is:
6156 catch unload if <cond>
6157 catch unload <filename>
6158 catch unload <filename> if <cond>
6160 The user is not allowed to specify the <filename> after an
6163 We'll ignore the pathological case of a file named "if".
6165 First, check if there's an if clause. If so, then there
6166 cannot be a filename. */
6167 cond_string = ep_parse_optional_if_clause (&arg);
6169 /* If there was an if clause, then there cannot be a filename.
6170 Else, there might be a filename and an if clause. */
6171 if (cond_string == NULL)
6173 dll_pathname = ep_parse_optional_filename (&arg);
6174 ep_skip_leading_whitespace (&arg);
6175 cond_string = ep_parse_optional_if_clause (&arg);
6178 if ((*arg != '\0') && !isspace (*arg))
6179 error ("Junk at end of arguments.");
6181 /* Create an unload breakpoint that only triggers when an unload of
6182 the specified dll (or any dll, if no pathname was specified)
6184 SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid), tempflag,
6185 dll_pathname, cond_string);
6187 #endif /* SOLIB_ADD */
6189 /* Commands to deal with catching exceptions. */
6191 /* Set a breakpoint at the specified callback routine for an
6192 exception event callback */
6195 create_exception_catchpoint (int tempflag, char *cond_string,
6196 enum exception_event_kind ex_event,
6197 struct symtab_and_line *sal)
6199 struct breakpoint *b;
6200 int thread = -1; /* All threads. */
6203 if (!sal) /* no exception support? */
6208 case EX_EVENT_THROW:
6209 bptype = bp_catch_throw;
6211 case EX_EVENT_CATCH:
6212 bptype = bp_catch_catch;
6214 default: /* error condition */
6215 error ("Internal error -- invalid catchpoint kind");
6218 b = set_raw_breakpoint (*sal, bptype);
6219 set_breakpoint_count (breakpoint_count + 1);
6220 b->number = breakpoint_count;
6222 b->cond_string = (cond_string == NULL) ?
6223 NULL : savestring (cond_string, strlen (cond_string));
6225 b->addr_string = NULL;
6226 b->enable = enabled;
6227 b->disposition = tempflag ? del : donttouch;
6231 /* Deal with "catch catch" and "catch throw" commands */
6234 catch_exception_command_1 (enum exception_event_kind ex_event, char *arg,
6235 int tempflag, int from_tty)
6237 char *cond_string = NULL;
6238 struct symtab_and_line *sal = NULL;
6240 ep_skip_leading_whitespace (&arg);
6242 cond_string = ep_parse_optional_if_clause (&arg);
6244 if ((*arg != '\0') && !isspace (*arg))
6245 error ("Junk at end of arguments.");
6247 if ((ex_event != EX_EVENT_THROW) &&
6248 (ex_event != EX_EVENT_CATCH))
6249 error ("Unsupported or unknown exception event; cannot catch it");
6251 /* See if we can find a callback routine */
6252 sal = target_enable_exception_callback (ex_event, 1);
6256 /* We have callbacks from the runtime system for exceptions.
6257 Set a breakpoint on the sal found, if no errors */
6258 if (sal != (struct symtab_and_line *) -1)
6259 create_exception_catchpoint (tempflag, cond_string, ex_event, sal);
6261 return; /* something went wrong with setting up callbacks */
6265 /* No callbacks from runtime system for exceptions.
6266 Try GNU C++ exception breakpoints using labels in debug info. */
6267 if (ex_event == EX_EVENT_CATCH)
6269 handle_gnu_4_16_catch_command (arg, tempflag, from_tty);
6271 else if (ex_event == EX_EVENT_THROW)
6273 /* Set a breakpoint on __raise_exception () */
6275 warning ("Unsupported with this platform/compiler combination.");
6276 warning ("Perhaps you can achieve the effect you want by setting");
6277 warning ("a breakpoint on __raise_exception().");
6282 /* Cover routine to allow wrapping target_enable_exception_catchpoints
6283 inside a catch_errors */
6286 cover_target_enable_exception_callback (PTR arg)
6288 args_for_catchpoint_enable *args = arg;
6289 struct symtab_and_line *sal;
6290 sal = target_enable_exception_callback (args->kind, args->enable);
6293 else if (sal == (struct symtab_and_line *) -1)
6296 return 1; /*is valid */
6301 /* This is the original v.4.16 and earlier version of the
6302 catch_command_1() function. Now that other flavours of "catch"
6303 have been introduced, and since exception handling can be handled
6304 in other ways (through target ops) also, this is used only for the
6305 GNU C++ exception handling system.
6306 Note: Only the "catch" flavour of GDB 4.16 is handled here. The
6307 "catch NAME" is now no longer allowed in catch_command_1(). Also,
6308 there was no code in GDB 4.16 for "catch throw".
6310 Called from catch_exception_command_1 () */
6314 handle_gnu_4_16_catch_command (char *arg, int tempflag, int from_tty)
6316 /* First, translate ARG into something we can deal with in terms
6319 struct symtabs_and_lines sals;
6320 struct symtab_and_line sal;
6321 register struct expression *cond = 0;
6322 register struct breakpoint *b;
6326 INIT_SAL (&sal); /* initialize to zeroes */
6328 /* If no arg given, or if first arg is 'if ', all active catch clauses
6329 are breakpointed. */
6331 if (!arg || (arg[0] == 'i' && arg[1] == 'f'
6332 && (arg[2] == ' ' || arg[2] == '\t')))
6334 /* Grab all active catch clauses. */
6335 sals = get_catch_sals (0);
6339 /* Grab selected catch clauses. */
6340 error ("catch NAME not implemented");
6343 /* Not sure why this code has been disabled. I'm leaving
6344 it disabled. We can never come here now anyway
6345 since we don't allow the "catch NAME" syntax.
6348 /* This isn't used; I don't know what it was for. */
6349 sals = map_catch_names (arg, catch_breakpoint);
6357 for (i = 0; i < sals.nelts; i++)
6359 resolve_sal_pc (&sals.sals[i]);
6363 if (arg[0] == 'i' && arg[1] == 'f'
6364 && (arg[2] == ' ' || arg[2] == '\t'))
6365 cond = parse_exp_1 ((arg += 2, &arg),
6366 block_for_pc (sals.sals[i].pc), 0);
6368 error ("Junk at end of arguments.");
6373 for (i = 0; i < sals.nelts; i++)
6378 describe_other_breakpoints (sal.pc, sal.section);
6380 /* Important -- this is an ordinary breakpoint. For platforms
6381 with callback support for exceptions,
6382 create_exception_catchpoint() will create special bp types
6383 (bp_catch_catch and bp_catch_throw), and there is code in
6384 insert_breakpoints() and elsewhere that depends on that. */
6385 b = set_raw_breakpoint (sal, bp_breakpoint);
6386 set_breakpoint_count (breakpoint_count + 1);
6387 b->number = breakpoint_count;
6390 b->enable = enabled;
6391 b->disposition = tempflag ? del : donttouch;
6398 warning ("Multiple breakpoints were set.");
6399 warning ("Use the \"delete\" command to delete unwanted breakpoints.");
6405 /* This creates a temporary internal breakpoint
6406 just to placate infrun */
6407 static struct breakpoint *
6408 create_temp_exception_breakpoint (CORE_ADDR pc)
6410 struct symtab_and_line sal;
6411 struct breakpoint *b;
6418 b = set_raw_breakpoint (sal, bp_breakpoint);
6420 b->disposition = del;
6421 b->enable = enabled;
6423 b->number = internal_breakpoint_number--;
6429 catch_command_1 (char *arg, int tempflag, int from_tty)
6432 /* The first argument may be an event name, such as "start" or "load".
6433 If so, then handle it as such. If it doesn't match an event name,
6434 then attempt to interpret it as an exception name. (This latter is
6435 the v4.16-and-earlier GDB meaning of the "catch" command.)
6437 First, try to find the bounds of what might be an event name. */
6438 char *arg1_start = arg;
6442 if (arg1_start == NULL)
6444 /* Old behaviour was to use pre-v-4.16 syntax */
6445 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6447 /* Now, this is not allowed */
6448 error ("Catch requires an event name.");
6451 arg1_end = ep_find_event_name_end (arg1_start);
6452 if (arg1_end == NULL)
6453 error ("catch requires an event");
6454 arg1_length = arg1_end + 1 - arg1_start;
6456 /* Try to match what we found against known event names. */
6457 if (strncmp (arg1_start, "signal", arg1_length) == 0)
6459 error ("Catch of signal not yet implemented");
6461 else if (strncmp (arg1_start, "catch", arg1_length) == 0)
6463 catch_exception_command_1 (EX_EVENT_CATCH, arg1_end + 1,
6464 tempflag, from_tty);
6466 else if (strncmp (arg1_start, "throw", arg1_length) == 0)
6468 catch_exception_command_1 (EX_EVENT_THROW, arg1_end + 1,
6469 tempflag, from_tty);
6471 else if (strncmp (arg1_start, "thread_start", arg1_length) == 0)
6473 error ("Catch of thread_start not yet implemented");
6475 else if (strncmp (arg1_start, "thread_exit", arg1_length) == 0)
6477 error ("Catch of thread_exit not yet implemented");
6479 else if (strncmp (arg1_start, "thread_join", arg1_length) == 0)
6481 error ("Catch of thread_join not yet implemented");
6483 else if (strncmp (arg1_start, "start", arg1_length) == 0)
6485 error ("Catch of start not yet implemented");
6487 else if (strncmp (arg1_start, "exit", arg1_length) == 0)
6489 error ("Catch of exit not yet implemented");
6491 else if (strncmp (arg1_start, "fork", arg1_length) == 0)
6493 #if defined(CHILD_INSERT_FORK_CATCHPOINT)
6494 catch_fork_command_1 (catch_fork, arg1_end + 1, tempflag, from_tty);
6496 error ("Catch of fork not yet implemented");
6499 else if (strncmp (arg1_start, "vfork", arg1_length) == 0)
6501 #if defined(CHILD_INSERT_VFORK_CATCHPOINT)
6502 catch_fork_command_1 (catch_vfork, arg1_end + 1, tempflag, from_tty);
6504 error ("Catch of vfork not yet implemented");
6507 else if (strncmp (arg1_start, "exec", arg1_length) == 0)
6509 #if defined(CHILD_INSERT_EXEC_CATCHPOINT)
6510 catch_exec_command_1 (arg1_end + 1, tempflag, from_tty);
6512 error ("Catch of exec not yet implemented");
6515 else if (strncmp (arg1_start, "load", arg1_length) == 0)
6517 #if defined(SOLIB_ADD)
6518 catch_load_command_1 (arg1_end + 1, tempflag, from_tty);
6520 error ("Catch of load not implemented");
6523 else if (strncmp (arg1_start, "unload", arg1_length) == 0)
6525 #if defined(SOLIB_ADD)
6526 catch_unload_command_1 (arg1_end + 1, tempflag, from_tty);
6528 error ("Catch of load not implemented");
6531 else if (strncmp (arg1_start, "stop", arg1_length) == 0)
6533 error ("Catch of stop not yet implemented");
6536 /* This doesn't appear to be an event name */
6540 /* Pre-v.4.16 behaviour was to treat the argument
6541 as the name of an exception */
6542 /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
6543 /* Now this is not allowed */
6544 error ("Unknown event kind specified for catch");
6549 /* Used by the gui, could be made a worker for other things. */
6552 set_breakpoint_sal (struct symtab_and_line sal)
6554 struct breakpoint *b;
6555 b = set_raw_breakpoint (sal, bp_breakpoint);
6556 set_breakpoint_count (breakpoint_count + 1);
6557 b->number = breakpoint_count;
6564 /* These aren't used; I don't know what they were for. */
6565 /* Disable breakpoints on all catch clauses described in ARGS. */
6567 disable_catch (char *args)
6569 /* Map the disable command to catch clauses described in ARGS. */
6572 /* Enable breakpoints on all catch clauses described in ARGS. */
6574 enable_catch (char *args)
6576 /* Map the disable command to catch clauses described in ARGS. */
6579 /* Delete breakpoints on all catch clauses in the active scope. */
6581 delete_catch (char *args)
6583 /* Map the delete command to catch clauses described in ARGS. */
6588 catch_command (char *arg, int from_tty)
6590 catch_command_1 (arg, 0, from_tty);
6595 tcatch_command (char *arg, int from_tty)
6597 catch_command_1 (arg, 1, from_tty);
6602 clear_command (char *arg, int from_tty)
6604 register struct breakpoint *b, *b1;
6606 struct symtabs_and_lines sals;
6607 struct symtab_and_line sal;
6608 register struct breakpoint *found;
6613 sals = decode_line_spec (arg, 1);
6618 sals.sals = (struct symtab_and_line *)
6619 xmalloc (sizeof (struct symtab_and_line));
6620 INIT_SAL (&sal); /* initialize to zeroes */
6621 sal.line = default_breakpoint_line;
6622 sal.symtab = default_breakpoint_symtab;
6623 sal.pc = default_breakpoint_address;
6624 if (sal.symtab == 0)
6625 error ("No source file specified.");
6633 /* For each line spec given, delete bps which correspond
6634 to it. We do this in two loops: the first loop looks at
6635 the initial bp(s) in the chain which should be deleted,
6636 the second goes down the rest of the chain looking ahead
6637 one so it can take those bps off the chain without messing
6641 for (i = 0; i < sals.nelts; i++)
6643 /* If exact pc given, clear bpts at that pc.
6644 If line given (pc == 0), clear all bpts on specified line.
6645 If defaulting, clear all bpts on default line
6648 defaulting sal.pc != 0 tests to do
6653 1 0 <can't happen> */
6656 found = (struct breakpoint *) 0;
6659 while (breakpoint_chain
6660 /* Why don't we check here that this is not
6661 a watchpoint, etc., as we do below?
6662 I can't make it fail, but don't know
6663 what's stopping the failure: a watchpoint
6664 of the same address as "sal.pc" should
6665 wind up being deleted. */
6667 && (((sal.pc && (breakpoint_chain->address == sal.pc)) &&
6668 (overlay_debugging == 0 ||
6669 breakpoint_chain->section == sal.section))
6670 || ((default_match || (0 == sal.pc))
6671 && breakpoint_chain->source_file != NULL
6672 && sal.symtab != NULL
6673 && STREQ (breakpoint_chain->source_file, sal.symtab->filename)
6674 && breakpoint_chain->line_number == sal.line)))
6677 b1 = breakpoint_chain;
6678 breakpoint_chain = b1->next;
6686 && b->next->type != bp_none
6687 && b->next->type != bp_watchpoint
6688 && b->next->type != bp_hardware_watchpoint
6689 && b->next->type != bp_read_watchpoint
6690 && b->next->type != bp_access_watchpoint
6691 && (((sal.pc && (b->next->address == sal.pc)) &&
6692 (overlay_debugging == 0 ||
6693 b->next->section == sal.section))
6694 || ((default_match || (0 == sal.pc))
6695 && b->next->source_file != NULL
6696 && sal.symtab != NULL
6697 && STREQ (b->next->source_file, sal.symtab->filename)
6698 && b->next->line_number == sal.line)))
6711 error ("No breakpoint at %s.", arg);
6713 error ("No breakpoint at this line.");
6717 from_tty = 1; /* Always report if deleted more than one */
6719 printf_unfiltered ("Deleted breakpoint%s ", found->next ? "s" : "");
6720 breakpoints_changed ();
6724 printf_unfiltered ("%d ", found->number);
6726 delete_breakpoint (found);
6730 putchar_unfiltered ('\n');
6735 /* Delete breakpoint in BS if they are `delete' breakpoints and
6736 all breakpoints that are marked for deletion, whether hit or not.
6737 This is called after any breakpoint is hit, or after errors. */
6740 breakpoint_auto_delete (bpstat bs)
6742 struct breakpoint *b, *temp;
6744 for (; bs; bs = bs->next)
6745 if (bs->breakpoint_at && bs->breakpoint_at->disposition == del
6747 delete_breakpoint (bs->breakpoint_at);
6749 ALL_BREAKPOINTS_SAFE (b, temp)
6751 if (b->disposition == del_at_next_stop)
6752 delete_breakpoint (b);
6756 /* Delete a breakpoint and clean up all traces of it in the data
6760 delete_breakpoint (struct breakpoint *bpt)
6762 register struct breakpoint *b;
6766 error ("Internal error (attempted to delete a NULL breakpoint)");
6769 /* Has this bp already been deleted? This can happen because multiple
6770 lists can hold pointers to bp's. bpstat lists are especial culprits.
6772 One example of this happening is a watchpoint's scope bp. When the
6773 scope bp triggers, we notice that the watchpoint is out of scope, and
6774 delete it. We also delete its scope bp. But the scope bp is marked
6775 "auto-deleting", and is already on a bpstat. That bpstat is then
6776 checked for auto-deleting bp's, which are deleted.
6778 A real solution to this problem might involve reference counts in bp's,
6779 and/or giving them pointers back to their referencing bpstat's, and
6780 teaching delete_breakpoint to only free a bp's storage when no more
6781 references were extent. A cheaper bandaid was chosen. */
6782 if (bpt->type == bp_none)
6785 if (delete_breakpoint_hook)
6786 delete_breakpoint_hook (bpt);
6787 breakpoint_delete_event (bpt->number);
6790 remove_breakpoint (bpt, mark_inserted);
6792 if (breakpoint_chain == bpt)
6793 breakpoint_chain = bpt->next;
6795 /* If we have callback-style exception catchpoints, don't go through
6796 the adjustments to the C++ runtime library etc. if the inferior
6797 isn't actually running. target_enable_exception_callback for a
6798 null target ops vector gives an undesirable error message, so we
6799 check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
6800 exceptions are supported in this way, it's OK for now. FIXME */
6801 if (ep_is_exception_catchpoint (bpt) && target_has_execution)
6803 static char message1[] = "Error in deleting catchpoint %d:\n";
6804 static char message[sizeof (message1) + 30];
6805 args_for_catchpoint_enable args;
6807 /* Format possible error msg */
6808 sprintf (message, message1, bpt->number);
6809 args.kind = bpt->type == bp_catch_catch ?
6810 EX_EVENT_CATCH : EX_EVENT_THROW;
6812 catch_errors (cover_target_enable_exception_callback, &args,
6813 message, RETURN_MASK_ALL);
6820 b->next = bpt->next;
6824 /* Before turning off the visuals for the bp, check to see that
6825 there are no other bps at the same address. */
6832 clearIt = (b->address != bpt->address);
6839 TUIDO (((TuiOpaqueFuncPtr) tui_vAllSetHasBreakAt, bpt, 0));
6840 TUIDO (((TuiOpaqueFuncPtr) tuiUpdateAllExecInfos));
6844 check_duplicates (bpt);
6845 /* If this breakpoint was inserted, and there is another breakpoint
6846 at the same address, we need to insert the other breakpoint. */
6848 && bpt->type != bp_hardware_watchpoint
6849 && bpt->type != bp_read_watchpoint
6850 && bpt->type != bp_access_watchpoint
6851 && bpt->type != bp_catch_fork
6852 && bpt->type != bp_catch_vfork
6853 && bpt->type != bp_catch_exec)
6856 if (b->address == bpt->address
6857 && b->section == bpt->section
6859 && b->enable != disabled
6860 && b->enable != shlib_disabled
6861 && b->enable != call_disabled)
6865 /* We should never reach this point if there is a permanent
6866 breakpoint at the same address as the one being deleted.
6867 If there is a permanent breakpoint somewhere, it should
6868 always be the only one inserted. */
6869 if (b->enable == permanent)
6870 internal_error (__FILE__, __LINE__,
6871 "another breakpoint was inserted on top of "
6872 "a permanent breakpoint");
6874 if (b->type == bp_hardware_breakpoint)
6875 val = target_insert_hw_breakpoint (b->address, b->shadow_contents);
6877 val = target_insert_breakpoint (b->address, b->shadow_contents);
6881 target_terminal_ours_for_output ();
6882 warning ("Cannot insert breakpoint %d:", b->number);
6883 memory_error (val, b->address); /* which bombs us out */
6890 free_command_lines (&bpt->commands);
6893 if (bpt->cond_string != NULL)
6894 xfree (bpt->cond_string);
6895 if (bpt->addr_string != NULL)
6896 xfree (bpt->addr_string);
6897 if (bpt->exp != NULL)
6899 if (bpt->exp_string != NULL)
6900 xfree (bpt->exp_string);
6901 if (bpt->val != NULL)
6902 value_free (bpt->val);
6903 if (bpt->source_file != NULL)
6904 xfree (bpt->source_file);
6905 if (bpt->dll_pathname != NULL)
6906 xfree (bpt->dll_pathname);
6907 if (bpt->triggered_dll_pathname != NULL)
6908 xfree (bpt->triggered_dll_pathname);
6909 if (bpt->exec_pathname != NULL)
6910 xfree (bpt->exec_pathname);
6912 /* Be sure no bpstat's are pointing at it after it's been freed. */
6913 /* FIXME, how can we find all bpstat's?
6914 We just check stop_bpstat for now. */
6915 for (bs = stop_bpstat; bs; bs = bs->next)
6916 if (bs->breakpoint_at == bpt)
6918 bs->breakpoint_at = NULL;
6920 /* we'd call bpstat_clear_actions, but that free's stuff and due
6921 to the multiple pointers pointing to one item with no
6922 reference counts found anywhere through out the bpstat's (how
6923 do you spell fragile?), we don't want to free things twice --
6924 better a memory leak than a corrupt malloc pool! */
6925 bs->commands = NULL;
6928 /* On the chance that someone will soon try again to delete this same
6929 bp, we mark it as deleted before freeing its storage. */
6930 bpt->type = bp_none;
6936 do_delete_breakpoint_cleanup (void *b)
6938 delete_breakpoint (b);
6942 make_cleanup_delete_breakpoint (struct breakpoint *b)
6944 return make_cleanup (do_delete_breakpoint_cleanup, b);
6948 make_exec_cleanup_delete_breakpoint (struct breakpoint *b)
6950 return make_exec_cleanup (do_delete_breakpoint_cleanup, b);
6954 delete_command (char *arg, int from_tty)
6956 struct breakpoint *b, *temp;
6960 int breaks_to_delete = 0;
6962 /* Delete all breakpoints if no argument.
6963 Do not delete internal or call-dummy breakpoints, these
6964 have to be deleted with an explicit breakpoint number argument. */
6967 if (b->type != bp_call_dummy &&
6968 b->type != bp_shlib_event &&
6969 b->type != bp_thread_event &&
6971 breaks_to_delete = 1;
6974 /* Ask user only if there are some breakpoints to delete. */
6976 || (breaks_to_delete && query ("Delete all breakpoints? ")))
6978 ALL_BREAKPOINTS_SAFE (b, temp)
6980 if (b->type != bp_call_dummy &&
6981 b->type != bp_shlib_event &&
6982 b->type != bp_thread_event &&
6984 delete_breakpoint (b);
6989 map_breakpoint_numbers (arg, delete_breakpoint);
6992 /* Reset a breakpoint given it's struct breakpoint * BINT.
6993 The value we return ends up being the return value from catch_errors.
6994 Unused in this case. */
6997 breakpoint_re_set_one (PTR bint)
6999 /* get past catch_errs */
7000 struct breakpoint *b = (struct breakpoint *) bint;
7003 struct symtabs_and_lines sals;
7005 enum enable save_enable;
7010 warning ("attempted to reset apparently deleted breakpoint #%d?",
7014 case bp_hardware_breakpoint:
7016 case bp_catch_unload:
7017 if (b->addr_string == NULL)
7019 /* Anything without a string can't be re-set. */
7020 delete_breakpoint (b);
7023 /* In case we have a problem, disable this breakpoint. We'll restore
7024 its status if we succeed. */
7025 save_enable = b->enable;
7026 b->enable = disabled;
7028 set_language (b->language);
7029 input_radix = b->input_radix;
7031 sals = decode_line_1 (&s, 1, (struct symtab *) NULL, 0, (char ***) NULL);
7032 for (i = 0; i < sals.nelts; i++)
7034 resolve_sal_pc (&sals.sals[i]);
7036 /* Reparse conditions, they might contain references to the
7038 if (b->cond_string != NULL)
7043 b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0);
7046 /* We need to re-set the breakpoint if the address changes... */
7047 if (b->address != sals.sals[i].pc
7048 /* ...or new and old breakpoints both have source files, and
7049 the source file name or the line number changes... */
7050 || (b->source_file != NULL
7051 && sals.sals[i].symtab != NULL
7052 && (!STREQ (b->source_file, sals.sals[i].symtab->filename)
7053 || b->line_number != sals.sals[i].line)
7055 /* ...or we switch between having a source file and not having
7057 || ((b->source_file == NULL) != (sals.sals[i].symtab == NULL))
7060 if (b->source_file != NULL)
7061 xfree (b->source_file);
7062 if (sals.sals[i].symtab == NULL)
7063 b->source_file = NULL;
7066 savestring (sals.sals[i].symtab->filename,
7067 strlen (sals.sals[i].symtab->filename));
7068 b->line_number = sals.sals[i].line;
7069 b->address = sals.sals[i].pc;
7071 /* Used to check for duplicates here, but that can
7072 cause trouble, as it doesn't check for disable
7077 /* Might be better to do this just once per breakpoint_re_set,
7078 rather than once for every breakpoint. */
7079 breakpoints_changed ();
7081 b->section = sals.sals[i].section;
7082 b->enable = save_enable; /* Restore it, this worked. */
7085 /* Now that this is re-enabled, check_duplicates
7087 check_duplicates (b);
7094 case bp_hardware_watchpoint:
7095 case bp_read_watchpoint:
7096 case bp_access_watchpoint:
7097 innermost_block = NULL;
7098 /* The issue arises of what context to evaluate this in. The
7099 same one as when it was set, but what does that mean when
7100 symbols have been re-read? We could save the filename and
7101 functionname, but if the context is more local than that, the
7102 best we could do would be something like how many levels deep
7103 and which index at that particular level, but that's going to
7104 be less stable than filenames or function names. */
7106 /* So for now, just use a global context. */
7109 b->exp = parse_expression (b->exp_string);
7110 b->exp_valid_block = innermost_block;
7111 mark = value_mark ();
7113 value_free (b->val);
7114 b->val = evaluate_expression (b->exp);
7115 release_value (b->val);
7116 if (VALUE_LAZY (b->val))
7117 value_fetch_lazy (b->val);
7119 if (b->cond_string != NULL)
7124 b->cond = parse_exp_1 (&s, (struct block *) 0, 0);
7126 if (b->enable == enabled)
7128 value_free_to_mark (mark);
7130 case bp_catch_catch:
7131 case bp_catch_throw:
7133 /* We needn't really do anything to reset these, since the mask
7134 that requests them is unaffected by e.g., new libraries being
7137 case bp_catch_vfork:
7142 printf_filtered ("Deleting unknown breakpoint type %d\n", b->type);
7144 /* Delete longjmp breakpoints, they will be reset later by
7145 breakpoint_re_set. */
7147 case bp_longjmp_resume:
7148 delete_breakpoint (b);
7151 /* This breakpoint is special, it's set up when the inferior
7152 starts and we really don't want to touch it. */
7153 case bp_shlib_event:
7155 /* Like bp_shlib_event, this breakpoint type is special.
7156 Once it is set up, we do not want to touch it. */
7157 case bp_thread_event:
7159 /* Keep temporary breakpoints, which can be encountered when we step
7160 over a dlopen call and SOLIB_ADD is resetting the breakpoints.
7161 Otherwise these should have been blown away via the cleanup chain
7162 or by breakpoint_init_inferior when we rerun the executable. */
7165 case bp_watchpoint_scope:
7167 case bp_step_resume:
7174 /* Re-set all breakpoints after symbols have been re-loaded. */
7176 breakpoint_re_set (void)
7178 struct breakpoint *b, *temp;
7179 enum language save_language;
7180 int save_input_radix;
7181 static char message1[] = "Error in re-setting breakpoint %d:\n";
7182 char message[sizeof (message1) + 30 /* slop */ ];
7184 save_language = current_language->la_language;
7185 save_input_radix = input_radix;
7186 ALL_BREAKPOINTS_SAFE (b, temp)
7188 /* Format possible error msg */
7189 sprintf (message, message1, b->number);
7190 catch_errors (breakpoint_re_set_one, b, message, RETURN_MASK_ALL);
7192 set_language (save_language);
7193 input_radix = save_input_radix;
7195 #ifdef GET_LONGJMP_TARGET
7196 create_longjmp_breakpoint ("longjmp");
7197 create_longjmp_breakpoint ("_longjmp");
7198 create_longjmp_breakpoint ("siglongjmp");
7199 create_longjmp_breakpoint ("_siglongjmp");
7200 create_longjmp_breakpoint (NULL);
7204 /* Took this out (temporarily at least), since it produces an extra
7205 blank line at startup. This messes up the gdbtests. -PB */
7206 /* Blank line to finish off all those mention() messages we just printed. */
7207 printf_filtered ("\n");
7211 /* Set ignore-count of breakpoint number BPTNUM to COUNT.
7212 If from_tty is nonzero, it prints a message to that effect,
7213 which ends with a period (no newline). */
7215 /* Reset the thread number of this breakpoint:
7217 - If the breakpoint is for all threads, leave it as-is.
7218 - Else, reset it to the current thread for inferior_ptid. */
7220 breakpoint_re_set_thread (struct breakpoint *b)
7222 if (b->thread != -1)
7224 if (in_thread_list (inferior_ptid))
7225 b->thread = pid_to_thread_id (inferior_ptid);
7230 set_ignore_count (int bptnum, int count, int from_tty)
7232 register struct breakpoint *b;
7238 if (b->number == bptnum)
7240 b->ignore_count = count;
7243 else if (count == 0)
7244 printf_filtered ("Will stop next time breakpoint %d is reached.",
7246 else if (count == 1)
7247 printf_filtered ("Will ignore next crossing of breakpoint %d.",
7250 printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
7252 breakpoints_changed ();
7256 error ("No breakpoint number %d.", bptnum);
7259 /* Clear the ignore counts of all breakpoints. */
7261 breakpoint_clear_ignore_counts (void)
7263 struct breakpoint *b;
7266 b->ignore_count = 0;
7269 /* Command to set ignore-count of breakpoint N to COUNT. */
7272 ignore_command (char *args, int from_tty)
7278 error_no_arg ("a breakpoint number");
7280 num = get_number (&p);
7282 error ("bad breakpoint number: '%s'", args);
7284 error ("Second argument (specified ignore-count) is missing.");
7286 set_ignore_count (num,
7287 longest_to_int (value_as_long (parse_and_eval (p))),
7289 printf_filtered ("\n");
7290 breakpoints_changed ();
7293 /* Call FUNCTION on each of the breakpoints
7294 whose numbers are given in ARGS. */
7297 map_breakpoint_numbers (char *args, void (*function) (struct breakpoint *))
7299 register char *p = args;
7302 register struct breakpoint *b, *tmp;
7306 error_no_arg ("one or more breakpoint numbers");
7313 num = get_number_or_range (&p1);
7316 warning ("bad breakpoint number at or near '%s'", p);
7320 ALL_BREAKPOINTS_SAFE (b, tmp)
7321 if (b->number == num)
7323 struct breakpoint *related_breakpoint = b->related_breakpoint;
7326 if (related_breakpoint)
7327 function (related_breakpoint);
7331 printf_unfiltered ("No breakpoint number %d.\n", num);
7338 disable_breakpoint (struct breakpoint *bpt)
7340 /* Never disable a watchpoint scope breakpoint; we want to
7341 hit them when we leave scope so we can delete both the
7342 watchpoint and its scope breakpoint at that time. */
7343 if (bpt->type == bp_watchpoint_scope)
7346 /* You can't disable permanent breakpoints. */
7347 if (bpt->enable == permanent)
7350 bpt->enable = disabled;
7352 check_duplicates (bpt);
7354 if (modify_breakpoint_hook)
7355 modify_breakpoint_hook (bpt);
7356 breakpoint_modify_event (bpt->number);
7361 disable_command (char *args, int from_tty)
7363 register struct breakpoint *bpt;
7365 ALL_BREAKPOINTS (bpt)
7369 warning ("attempted to disable apparently deleted breakpoint #%d?",
7374 case bp_catch_unload:
7376 case bp_catch_vfork:
7378 case bp_catch_catch:
7379 case bp_catch_throw:
7380 case bp_hardware_breakpoint:
7382 case bp_hardware_watchpoint:
7383 case bp_read_watchpoint:
7384 case bp_access_watchpoint:
7385 disable_breakpoint (bpt);
7390 map_breakpoint_numbers (args, disable_breakpoint);
7394 do_enable_breakpoint (struct breakpoint *bpt, enum bpdisp disposition)
7396 struct frame_info *save_selected_frame = NULL;
7397 int save_selected_frame_level = -1;
7398 int target_resources_ok, other_type_used;
7401 if (bpt->type == bp_hardware_breakpoint)
7404 i = hw_breakpoint_used_count ();
7405 target_resources_ok =
7406 TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint,
7408 if (target_resources_ok == 0)
7409 error ("No hardware breakpoint support in the target.");
7410 else if (target_resources_ok < 0)
7411 error ("Hardware breakpoints used exceeds limit.");
7414 if (bpt->enable != permanent)
7415 bpt->enable = enabled;
7416 bpt->disposition = disposition;
7417 check_duplicates (bpt);
7418 breakpoints_changed ();
7420 if (bpt->type == bp_watchpoint ||
7421 bpt->type == bp_hardware_watchpoint ||
7422 bpt->type == bp_read_watchpoint ||
7423 bpt->type == bp_access_watchpoint)
7425 if (bpt->exp_valid_block != NULL)
7427 struct frame_info *fr =
7429 /* Ensure that we have the current frame. Else, this
7430 next query may pessimistically be answered as, "No,
7431 not within current scope". */
7432 get_current_frame ();
7433 fr = find_frame_addr_in_frame_chain (bpt->watchpoint_frame);
7437 Cannot enable watchpoint %d because the block in which its expression\n\
7438 is valid is not currently in scope.\n", bpt->number);
7439 bpt->enable = disabled;
7443 save_selected_frame = selected_frame;
7444 save_selected_frame_level = selected_frame_level;
7445 select_frame (fr, -1);
7448 value_free (bpt->val);
7449 mark = value_mark ();
7450 bpt->val = evaluate_expression (bpt->exp);
7451 release_value (bpt->val);
7452 if (VALUE_LAZY (bpt->val))
7453 value_fetch_lazy (bpt->val);
7455 if (bpt->type == bp_hardware_watchpoint ||
7456 bpt->type == bp_read_watchpoint ||
7457 bpt->type == bp_access_watchpoint)
7459 int i = hw_watchpoint_used_count (bpt->type, &other_type_used);
7460 int mem_cnt = can_use_hardware_watchpoint (bpt->val);
7462 /* Hack around 'unused var' error for some targets here */
7464 target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT (
7465 bpt->type, i + mem_cnt, other_type_used);
7466 /* we can consider of type is bp_hardware_watchpoint, convert to
7467 bp_watchpoint in the following condition */
7468 if (target_resources_ok < 0)
7471 Cannot enable watchpoint %d because target watch resources\n\
7472 have been allocated for other watchpoints.\n", bpt->number);
7473 bpt->enable = disabled;
7474 value_free_to_mark (mark);
7479 if (save_selected_frame_level >= 0)
7480 select_frame (save_selected_frame, save_selected_frame_level);
7481 value_free_to_mark (mark);
7483 if (modify_breakpoint_hook)
7484 modify_breakpoint_hook (bpt);
7485 breakpoint_modify_event (bpt->number);
7489 enable_breakpoint (struct breakpoint *bpt)
7491 do_enable_breakpoint (bpt, bpt->disposition);
7494 /* The enable command enables the specified breakpoints (or all defined
7495 breakpoints) so they once again become (or continue to be) effective
7496 in stopping the inferior. */
7500 enable_command (char *args, int from_tty)
7502 register struct breakpoint *bpt;
7504 ALL_BREAKPOINTS (bpt)
7508 warning ("attempted to enable apparently deleted breakpoint #%d?",
7513 case bp_catch_unload:
7515 case bp_catch_vfork:
7517 case bp_catch_catch:
7518 case bp_catch_throw:
7519 case bp_hardware_breakpoint:
7521 case bp_hardware_watchpoint:
7522 case bp_read_watchpoint:
7523 case bp_access_watchpoint:
7524 enable_breakpoint (bpt);
7529 map_breakpoint_numbers (args, enable_breakpoint);
7533 enable_once_breakpoint (struct breakpoint *bpt)
7535 do_enable_breakpoint (bpt, disable);
7540 enable_once_command (char *args, int from_tty)
7542 map_breakpoint_numbers (args, enable_once_breakpoint);
7546 enable_delete_breakpoint (struct breakpoint *bpt)
7548 do_enable_breakpoint (bpt, del);
7553 enable_delete_command (char *args, int from_tty)
7555 map_breakpoint_numbers (args, enable_delete_breakpoint);
7558 /* Use default_breakpoint_'s, or nothing if they aren't valid. */
7560 struct symtabs_and_lines
7561 decode_line_spec_1 (char *string, int funfirstline)
7563 struct symtabs_and_lines sals;
7565 error ("Empty line specification.");
7566 if (default_breakpoint_valid)
7567 sals = decode_line_1 (&string, funfirstline,
7568 default_breakpoint_symtab,
7569 default_breakpoint_line,
7572 sals = decode_line_1 (&string, funfirstline,
7573 (struct symtab *) NULL, 0, (char ***) NULL);
7575 error ("Junk at end of line specification: %s", string);
7580 _initialize_breakpoint (void)
7582 struct cmd_list_element *c;
7584 breakpoint_chain = 0;
7585 /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
7586 before a breakpoint is set. */
7587 breakpoint_count = 0;
7589 add_com ("ignore", class_breakpoint, ignore_command,
7590 "Set ignore-count of breakpoint number N to COUNT.\n\
7591 Usage is `ignore N COUNT'.");
7593 add_com_alias ("bc", "ignore", class_breakpoint, 1);
7595 add_com ("commands", class_breakpoint, commands_command,
7596 "Set commands to be executed when a breakpoint is hit.\n\
7597 Give breakpoint number as argument after \"commands\".\n\
7598 With no argument, the targeted breakpoint is the last one set.\n\
7599 The commands themselves follow starting on the next line.\n\
7600 Type a line containing \"end\" to indicate the end of them.\n\
7601 Give \"silent\" as the first line to make the breakpoint silent;\n\
7602 then no output is printed when it is hit, except what the commands print.");
7604 add_com ("condition", class_breakpoint, condition_command,
7605 "Specify breakpoint number N to break only if COND is true.\n\
7606 Usage is `condition N COND', where N is an integer and COND is an\n\
7607 expression to be evaluated whenever breakpoint N is reached. ");
7609 c = add_com ("tbreak", class_breakpoint, tbreak_command,
7610 "Set a temporary breakpoint. Args like \"break\" command.\n\
7611 Like \"break\" except the breakpoint is only temporary,\n\
7612 so it will be deleted when hit. Equivalent to \"break\" followed\n\
7613 by using \"enable delete\" on the breakpoint number.");
7614 c->completer = location_completer;
7616 c = add_com ("txbreak", class_breakpoint, tbreak_at_finish_command,
7617 "Set temporary breakpoint at procedure exit. Either there should\n\
7618 be no argument or the argument must be a depth.\n");
7619 c->completer = location_completer;
7621 c = add_com ("hbreak", class_breakpoint, hbreak_command,
7622 "Set a hardware assisted breakpoint. Args like \"break\" command.\n\
7623 Like \"break\" except the breakpoint requires hardware support,\n\
7624 some target hardware may not have this support.");
7625 c->completer = location_completer;
7627 c = add_com ("thbreak", class_breakpoint, thbreak_command,
7628 "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
7629 Like \"hbreak\" except the breakpoint is only temporary,\n\
7630 so it will be deleted when hit.");
7631 c->completer = location_completer;
7633 add_prefix_cmd ("enable", class_breakpoint, enable_command,
7634 "Enable some breakpoints.\n\
7635 Give breakpoint numbers (separated by spaces) as arguments.\n\
7636 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7637 This is used to cancel the effect of the \"disable\" command.\n\
7638 With a subcommand you can enable temporarily.",
7639 &enablelist, "enable ", 1, &cmdlist);
7641 add_com ("ab", class_breakpoint, enable_command,
7642 "Enable some breakpoints.\n\
7643 Give breakpoint numbers (separated by spaces) as arguments.\n\
7644 With no subcommand, breakpoints are enabled until you command otherwise.\n\
7645 This is used to cancel the effect of the \"disable\" command.\n\
7646 With a subcommand you can enable temporarily.");
7648 add_com_alias ("en", "enable", class_breakpoint, 1);
7650 add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command,
7651 "Enable some breakpoints.\n\
7652 Give breakpoint numbers (separated by spaces) as arguments.\n\
7653 This is used to cancel the effect of the \"disable\" command.\n\
7654 May be abbreviated to simply \"enable\".\n",
7655 &enablebreaklist, "enable breakpoints ", 1, &enablelist);
7657 add_cmd ("once", no_class, enable_once_command,
7658 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7659 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7662 add_cmd ("delete", no_class, enable_delete_command,
7663 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7664 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7667 add_cmd ("delete", no_class, enable_delete_command,
7668 "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
7669 If a breakpoint is hit while enabled in this fashion, it is deleted.",
7672 add_cmd ("once", no_class, enable_once_command,
7673 "Enable breakpoints for one hit. Give breakpoint numbers.\n\
7674 If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
7677 add_prefix_cmd ("disable", class_breakpoint, disable_command,
7678 "Disable some breakpoints.\n\
7679 Arguments are breakpoint numbers with spaces in between.\n\
7680 To disable all breakpoints, give no argument.\n\
7681 A disabled breakpoint is not forgotten, but has no effect until reenabled.",
7682 &disablelist, "disable ", 1, &cmdlist);
7683 add_com_alias ("dis", "disable", class_breakpoint, 1);
7684 add_com_alias ("disa", "disable", class_breakpoint, 1);
7686 add_com ("sb", class_breakpoint, disable_command,
7687 "Disable some breakpoints.\n\
7688 Arguments are breakpoint numbers with spaces in between.\n\
7689 To disable all breakpoints, give no argument.\n\
7690 A disabled breakpoint is not forgotten, but has no effect until reenabled.");
7692 add_cmd ("breakpoints", class_alias, disable_command,
7693 "Disable some breakpoints.\n\
7694 Arguments are breakpoint numbers with spaces in between.\n\
7695 To disable all breakpoints, give no argument.\n\
7696 A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
7697 This command may be abbreviated \"disable\".",
7700 add_prefix_cmd ("delete", class_breakpoint, delete_command,
7701 "Delete some breakpoints or auto-display expressions.\n\
7702 Arguments are breakpoint numbers with spaces in between.\n\
7703 To delete all breakpoints, give no argument.\n\
7705 Also a prefix command for deletion of other GDB objects.\n\
7706 The \"unset\" command is also an alias for \"delete\".",
7707 &deletelist, "delete ", 1, &cmdlist);
7708 add_com_alias ("d", "delete", class_breakpoint, 1);
7710 add_com ("db", class_breakpoint, delete_command,
7711 "Delete some breakpoints.\n\
7712 Arguments are breakpoint numbers with spaces in between.\n\
7713 To delete all breakpoints, give no argument.\n");
7715 add_cmd ("breakpoints", class_alias, delete_command,
7716 "Delete some breakpoints or auto-display expressions.\n\
7717 Arguments are breakpoint numbers with spaces in between.\n\
7718 To delete all breakpoints, give no argument.\n\
7719 This command may be abbreviated \"delete\".",
7722 add_com ("clear", class_breakpoint, clear_command,
7723 concat ("Clear breakpoint at specified line or function.\n\
7724 Argument may be line number, function name, or \"*\" and an address.\n\
7725 If line number is specified, all breakpoints in that line are cleared.\n\
7726 If function is specified, breakpoints at beginning of function are cleared.\n\
7727 If an address is specified, breakpoints at that address are cleared.\n\n",
7728 "With no argument, clears all breakpoints in the line that the selected frame\n\
7731 See also the \"delete\" command which clears breakpoints by number.", NULL));
7733 c = add_com ("break", class_breakpoint, break_command,
7734 concat ("Set breakpoint at specified line or function.\n\
7735 Argument may be line number, function name, or \"*\" and an address.\n\
7736 If line number is specified, break at start of code for that line.\n\
7737 If function is specified, break at start of code for that function.\n\
7738 If an address is specified, break at that exact address.\n",
7739 "With no arg, uses current execution address of selected stack frame.\n\
7740 This is useful for breaking on return to a stack frame.\n\
7742 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7744 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL));
7745 c->completer = location_completer;
7747 add_com_alias ("b", "break", class_run, 1);
7748 add_com_alias ("br", "break", class_run, 1);
7749 add_com_alias ("bre", "break", class_run, 1);
7750 add_com_alias ("brea", "break", class_run, 1);
7752 add_com ("xbreak", class_breakpoint, break_at_finish_command,
7753 concat ("Set breakpoint at procedure exit. \n\
7754 Argument may be function name, or \"*\" and an address.\n\
7755 If function is specified, break at end of code for that function.\n\
7756 If an address is specified, break at the end of the function that contains \n\
7757 that exact address.\n",
7758 "With no arg, uses current execution address of selected stack frame.\n\
7759 This is useful for breaking on return to a stack frame.\n\
7761 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
7763 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL));
7764 add_com_alias ("xb", "xbreak", class_breakpoint, 1);
7765 add_com_alias ("xbr", "xbreak", class_breakpoint, 1);
7766 add_com_alias ("xbre", "xbreak", class_breakpoint, 1);
7767 add_com_alias ("xbrea", "xbreak", class_breakpoint, 1);
7771 add_com_alias ("ba", "break", class_breakpoint, 1);
7772 add_com_alias ("bu", "ubreak", class_breakpoint, 1);
7773 add_com ("bx", class_breakpoint, break_at_finish_at_depth_command,
7774 "Set breakpoint at procedure exit. Either there should\n\
7775 be no argument or the argument must be a depth.\n");
7780 add_abbrev_prefix_cmd ("stop", class_breakpoint, stop_command,
7781 "Break in function/address or break at a line in the current file.",
7782 &stoplist, "stop ", 1, &cmdlist);
7783 add_cmd ("in", class_breakpoint, stopin_command,
7784 "Break in function or address.\n", &stoplist);
7785 add_cmd ("at", class_breakpoint, stopat_command,
7786 "Break at a line in the current file.\n", &stoplist);
7787 add_com ("status", class_info, breakpoints_info,
7788 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7789 The \"Type\" column indicates one of:\n\
7790 \tbreakpoint - normal breakpoint\n\
7791 \twatchpoint - watchpoint\n\
7792 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7793 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7794 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7795 address and file/line number respectively.\n\n",
7796 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7797 are set to the address of the last breakpoint listed.\n\n\
7798 Convenience variable \"$bpnum\" contains the number of the last\n\
7799 breakpoint set.", NULL));
7802 add_info ("breakpoints", breakpoints_info,
7803 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7804 The \"Type\" column indicates one of:\n\
7805 \tbreakpoint - normal breakpoint\n\
7806 \twatchpoint - watchpoint\n\
7807 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7808 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7809 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7810 address and file/line number respectively.\n\n",
7811 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7812 are set to the address of the last breakpoint listed.\n\n\
7813 Convenience variable \"$bpnum\" contains the number of the last\n\
7814 breakpoint set.", NULL));
7817 add_com ("lb", class_breakpoint, breakpoints_info,
7818 concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
7819 The \"Type\" column indicates one of:\n\
7820 \tbreakpoint - normal breakpoint\n\
7821 \twatchpoint - watchpoint\n\
7822 The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7823 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7824 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7825 address and file/line number respectively.\n\n",
7826 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7827 are set to the address of the last breakpoint listed.\n\n\
7828 Convenience variable \"$bpnum\" contains the number of the last\n\
7829 breakpoint set.", NULL));
7831 add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints,
7832 concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
7833 The \"Type\" column indicates one of:\n\
7834 \tbreakpoint - normal breakpoint\n\
7835 \twatchpoint - watchpoint\n\
7836 \tlongjmp - internal breakpoint used to step through longjmp()\n\
7837 \tlongjmp resume - internal breakpoint at the target of longjmp()\n\
7838 \tuntil - internal breakpoint used by the \"until\" command\n\
7839 \tfinish - internal breakpoint used by the \"finish\" command\n",
7840 "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
7841 the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
7842 breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
7843 address and file/line number respectively.\n\n",
7844 "Convenience variable \"$_\" and default examine address for \"x\"\n\
7845 are set to the address of the last breakpoint listed.\n\n\
7846 Convenience variable \"$bpnum\" contains the number of the last\n\
7847 breakpoint set.", NULL),
7848 &maintenanceinfolist);
7850 add_com ("catch", class_breakpoint, catch_command,
7851 "Set catchpoints to catch events.\n\
7852 Raised signals may be caught:\n\
7853 \tcatch signal - all signals\n\
7854 \tcatch signal <signame> - a particular signal\n\
7855 Raised exceptions may be caught:\n\
7856 \tcatch throw - all exceptions, when thrown\n\
7857 \tcatch throw <exceptname> - a particular exception, when thrown\n\
7858 \tcatch catch - all exceptions, when caught\n\
7859 \tcatch catch <exceptname> - a particular exception, when caught\n\
7860 Thread or process events may be caught:\n\
7861 \tcatch thread_start - any threads, just after creation\n\
7862 \tcatch thread_exit - any threads, just before expiration\n\
7863 \tcatch thread_join - any threads, just after joins\n\
7864 Process events may be caught:\n\
7865 \tcatch start - any processes, just after creation\n\
7866 \tcatch exit - any processes, just before expiration\n\
7867 \tcatch fork - calls to fork()\n\
7868 \tcatch vfork - calls to vfork()\n\
7869 \tcatch exec - calls to exec()\n\
7870 Dynamically-linked library events may be caught:\n\
7871 \tcatch load - loads of any library\n\
7872 \tcatch load <libname> - loads of a particular library\n\
7873 \tcatch unload - unloads of any library\n\
7874 \tcatch unload <libname> - unloads of a particular library\n\
7875 The act of your program's execution stopping may also be caught:\n\
7877 C++ exceptions may be caught:\n\
7878 \tcatch throw - all exceptions, when thrown\n\
7879 \tcatch catch - all exceptions, when caught\n\
7881 Do \"help set follow-fork-mode\" for info on debugging your program\n\
7882 after a fork or vfork is caught.\n\n\
7883 Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
7885 add_com ("tcatch", class_breakpoint, tcatch_command,
7886 "Set temporary catchpoints to catch events.\n\
7887 Args like \"catch\" command.\n\
7888 Like \"catch\" except the catchpoint is only temporary,\n\
7889 so it will be deleted when hit. Equivalent to \"catch\" followed\n\
7890 by using \"enable delete\" on the catchpoint number.");
7892 c = add_com ("watch", class_breakpoint, watch_command,
7893 "Set a watchpoint for an expression.\n\
7894 A watchpoint stops execution of your program whenever the value of\n\
7895 an expression changes.");
7896 c->completer = location_completer;
7898 c = add_com ("rwatch", class_breakpoint, rwatch_command,
7899 "Set a read watchpoint for an expression.\n\
7900 A watchpoint stops execution of your program whenever the value of\n\
7901 an expression is read.");
7902 c->completer = location_completer;
7904 c = add_com ("awatch", class_breakpoint, awatch_command,
7905 "Set a watchpoint for an expression.\n\
7906 A watchpoint stops execution of your program whenever the value of\n\
7907 an expression is either read or written.");
7908 c->completer = location_completer;
7910 add_info ("watchpoints", breakpoints_info,
7911 "Synonym for ``info breakpoints''.");
7914 c = add_set_cmd ("can-use-hw-watchpoints", class_support, var_zinteger,
7915 (char *) &can_use_hw_watchpoints,
7916 "Set debugger's willingness to use watchpoint hardware.\n\
7917 If zero, gdb will not use hardware for new watchpoints, even if\n\
7918 such is available. (However, any hardware watchpoints that were\n\
7919 created before setting this to nonzero, will continue to use watchpoint\n\
7922 add_show_from_set (c, &showlist);
7924 can_use_hw_watchpoints = 1;