1 /* Process record and replay target for GDB, the GNU debugger.
3 Copyright (C) 2013-2016 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 3 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, see <http://www.gnu.org/licenses/>. */
23 #include "gdbthread.h"
24 #include "event-top.h"
25 #include "completer.h"
26 #include "arch-utils.h"
30 #include "record-full.h"
33 #include "event-loop.h"
41 /* This module implements "target record-full", also known as "process
42 record and replay". This target sits on top of a "normal" target
43 (a target that "has execution"), and provides a record and replay
44 functionality, including reverse debugging.
46 Target record has two modes: recording, and replaying.
48 In record mode, we intercept the to_resume and to_wait methods.
49 Whenever gdb resumes the target, we run the target in single step
50 mode, and we build up an execution log in which, for each executed
51 instruction, we record all changes in memory and register state.
52 This is invisible to the user, to whom it just looks like an
53 ordinary debugging session (except for performance degredation).
55 In replay mode, instead of actually letting the inferior run as a
56 process, we simulate its execution by playing back the recorded
57 execution log. For each instruction in the log, we simulate the
58 instruction's side effects by duplicating the changes that it would
59 have made on memory and registers. */
61 #define DEFAULT_RECORD_FULL_INSN_MAX_NUM 200000
63 #define RECORD_FULL_IS_REPLAY \
64 (record_full_list->next || execution_direction == EXEC_REVERSE)
66 #define RECORD_FULL_FILE_MAGIC netorder32(0x20091016)
68 /* These are the core structs of the process record functionality.
70 A record_full_entry is a record of the value change of a register
71 ("record_full_reg") or a part of memory ("record_full_mem"). And each
72 instruction must have a struct record_full_entry ("record_full_end")
73 that indicates that this is the last struct record_full_entry of this
76 Each struct record_full_entry is linked to "record_full_list" by "prev"
77 and "next" pointers. */
79 struct record_full_mem_entry
83 /* Set this flag if target memory for this entry
84 can no longer be accessed. */
85 int mem_entry_not_accessible;
89 gdb_byte buf[sizeof (gdb_byte *)];
93 struct record_full_reg_entry
100 gdb_byte buf[2 * sizeof (gdb_byte *)];
104 struct record_full_end_entry
106 enum gdb_signal sigval;
110 enum record_full_type
117 /* This is the data structure that makes up the execution log.
119 The execution log consists of a single linked list of entries
120 of type "struct record_full_entry". It is doubly linked so that it
121 can be traversed in either direction.
123 The start of the list is anchored by a struct called
124 "record_full_first". The pointer "record_full_list" either points
125 to the last entry that was added to the list (in record mode), or to
126 the next entry in the list that will be executed (in replay mode).
128 Each list element (struct record_full_entry), in addition to next
129 and prev pointers, consists of a union of three entry types: mem,
130 reg, and end. A field called "type" determines which entry type is
131 represented by a given list element.
133 Each instruction that is added to the execution log is represented
134 by a variable number of list elements ('entries'). The instruction
135 will have one "reg" entry for each register that is changed by
136 executing the instruction (including the PC in every case). It
137 will also have one "mem" entry for each memory change. Finally,
138 each instruction will have an "end" entry that separates it from
139 the changes associated with the next instruction. */
141 struct record_full_entry
143 struct record_full_entry *prev;
144 struct record_full_entry *next;
145 enum record_full_type type;
149 struct record_full_reg_entry reg;
151 struct record_full_mem_entry mem;
153 struct record_full_end_entry end;
157 /* If true, query if PREC cannot record memory
158 change of next instruction. */
159 int record_full_memory_query = 0;
161 struct record_full_core_buf_entry
163 struct record_full_core_buf_entry *prev;
164 struct target_section *p;
168 /* Record buf with core target. */
169 static gdb_byte *record_full_core_regbuf = NULL;
170 static struct target_section *record_full_core_start;
171 static struct target_section *record_full_core_end;
172 static struct record_full_core_buf_entry *record_full_core_buf_list = NULL;
174 /* The following variables are used for managing the linked list that
175 represents the execution log.
177 record_full_first is the anchor that holds down the beginning of
180 record_full_list serves two functions:
181 1) In record mode, it anchors the end of the list.
182 2) In replay mode, it traverses the list and points to
183 the next instruction that must be emulated.
185 record_full_arch_list_head and record_full_arch_list_tail are used
186 to manage a separate list, which is used to build up the change
187 elements of the currently executing instruction during record mode.
188 When this instruction has been completely annotated in the "arch
189 list", it will be appended to the main execution log. */
191 static struct record_full_entry record_full_first;
192 static struct record_full_entry *record_full_list = &record_full_first;
193 static struct record_full_entry *record_full_arch_list_head = NULL;
194 static struct record_full_entry *record_full_arch_list_tail = NULL;
196 /* 1 ask user. 0 auto delete the last struct record_full_entry. */
197 static int record_full_stop_at_limit = 1;
198 /* Maximum allowed number of insns in execution log. */
199 static unsigned int record_full_insn_max_num
200 = DEFAULT_RECORD_FULL_INSN_MAX_NUM;
201 /* Actual count of insns presently in execution log. */
202 static unsigned int record_full_insn_num = 0;
203 /* Count of insns logged so far (may be larger
204 than count of insns presently in execution log). */
205 static ULONGEST record_full_insn_count;
207 /* The target_ops of process record. */
208 static struct target_ops record_full_ops;
209 static struct target_ops record_full_core_ops;
211 /* See record-full.h. */
214 record_full_is_used (void)
216 struct target_ops *t;
218 t = find_record_target ();
219 return (t == &record_full_ops
220 || t == &record_full_core_ops);
224 /* Command lists for "set/show record full". */
225 static struct cmd_list_element *set_record_full_cmdlist;
226 static struct cmd_list_element *show_record_full_cmdlist;
228 /* Command list for "record full". */
229 static struct cmd_list_element *record_full_cmdlist;
231 static void record_full_goto_insn (struct record_full_entry *entry,
232 enum exec_direction_kind dir);
233 static void record_full_save (struct target_ops *self,
234 const char *recfilename);
236 /* Alloc and free functions for record_full_reg, record_full_mem, and
237 record_full_end entries. */
239 /* Alloc a record_full_reg record entry. */
241 static inline struct record_full_entry *
242 record_full_reg_alloc (struct regcache *regcache, int regnum)
244 struct record_full_entry *rec;
245 struct gdbarch *gdbarch = get_regcache_arch (regcache);
247 rec = XCNEW (struct record_full_entry);
248 rec->type = record_full_reg;
249 rec->u.reg.num = regnum;
250 rec->u.reg.len = register_size (gdbarch, regnum);
251 if (rec->u.reg.len > sizeof (rec->u.reg.u.buf))
252 rec->u.reg.u.ptr = (gdb_byte *) xmalloc (rec->u.reg.len);
257 /* Free a record_full_reg record entry. */
260 record_full_reg_release (struct record_full_entry *rec)
262 gdb_assert (rec->type == record_full_reg);
263 if (rec->u.reg.len > sizeof (rec->u.reg.u.buf))
264 xfree (rec->u.reg.u.ptr);
268 /* Alloc a record_full_mem record entry. */
270 static inline struct record_full_entry *
271 record_full_mem_alloc (CORE_ADDR addr, int len)
273 struct record_full_entry *rec;
275 rec = XCNEW (struct record_full_entry);
276 rec->type = record_full_mem;
277 rec->u.mem.addr = addr;
278 rec->u.mem.len = len;
279 if (rec->u.mem.len > sizeof (rec->u.mem.u.buf))
280 rec->u.mem.u.ptr = (gdb_byte *) xmalloc (len);
285 /* Free a record_full_mem record entry. */
288 record_full_mem_release (struct record_full_entry *rec)
290 gdb_assert (rec->type == record_full_mem);
291 if (rec->u.mem.len > sizeof (rec->u.mem.u.buf))
292 xfree (rec->u.mem.u.ptr);
296 /* Alloc a record_full_end record entry. */
298 static inline struct record_full_entry *
299 record_full_end_alloc (void)
301 struct record_full_entry *rec;
303 rec = XCNEW (struct record_full_entry);
304 rec->type = record_full_end;
309 /* Free a record_full_end record entry. */
312 record_full_end_release (struct record_full_entry *rec)
317 /* Free one record entry, any type.
318 Return entry->type, in case caller wants to know. */
320 static inline enum record_full_type
321 record_full_entry_release (struct record_full_entry *rec)
323 enum record_full_type type = rec->type;
326 case record_full_reg:
327 record_full_reg_release (rec);
329 case record_full_mem:
330 record_full_mem_release (rec);
332 case record_full_end:
333 record_full_end_release (rec);
339 /* Free all record entries in list pointed to by REC. */
342 record_full_list_release (struct record_full_entry *rec)
353 record_full_entry_release (rec->next);
356 if (rec == &record_full_first)
358 record_full_insn_num = 0;
359 record_full_first.next = NULL;
362 record_full_entry_release (rec);
365 /* Free all record entries forward of the given list position. */
368 record_full_list_release_following (struct record_full_entry *rec)
370 struct record_full_entry *tmp = rec->next;
376 if (record_full_entry_release (tmp) == record_full_end)
378 record_full_insn_num--;
379 record_full_insn_count--;
385 /* Delete the first instruction from the beginning of the log, to make
386 room for adding a new instruction at the end of the log.
388 Note -- this function does not modify record_full_insn_num. */
391 record_full_list_release_first (void)
393 struct record_full_entry *tmp;
395 if (!record_full_first.next)
398 /* Loop until a record_full_end. */
401 /* Cut record_full_first.next out of the linked list. */
402 tmp = record_full_first.next;
403 record_full_first.next = tmp->next;
404 tmp->next->prev = &record_full_first;
406 /* tmp is now isolated, and can be deleted. */
407 if (record_full_entry_release (tmp) == record_full_end)
408 break; /* End loop at first record_full_end. */
410 if (!record_full_first.next)
412 gdb_assert (record_full_insn_num == 1);
413 break; /* End loop when list is empty. */
418 /* Add a struct record_full_entry to record_full_arch_list. */
421 record_full_arch_list_add (struct record_full_entry *rec)
423 if (record_debug > 1)
424 fprintf_unfiltered (gdb_stdlog,
425 "Process record: record_full_arch_list_add %s.\n",
426 host_address_to_string (rec));
428 if (record_full_arch_list_tail)
430 record_full_arch_list_tail->next = rec;
431 rec->prev = record_full_arch_list_tail;
432 record_full_arch_list_tail = rec;
436 record_full_arch_list_head = rec;
437 record_full_arch_list_tail = rec;
441 /* Return the value storage location of a record entry. */
442 static inline gdb_byte *
443 record_full_get_loc (struct record_full_entry *rec)
446 case record_full_mem:
447 if (rec->u.mem.len > sizeof (rec->u.mem.u.buf))
448 return rec->u.mem.u.ptr;
450 return rec->u.mem.u.buf;
451 case record_full_reg:
452 if (rec->u.reg.len > sizeof (rec->u.reg.u.buf))
453 return rec->u.reg.u.ptr;
455 return rec->u.reg.u.buf;
456 case record_full_end:
458 gdb_assert_not_reached ("unexpected record_full_entry type");
463 /* Record the value of a register NUM to record_full_arch_list. */
466 record_full_arch_list_add_reg (struct regcache *regcache, int regnum)
468 struct record_full_entry *rec;
470 if (record_debug > 1)
471 fprintf_unfiltered (gdb_stdlog,
472 "Process record: add register num = %d to "
476 rec = record_full_reg_alloc (regcache, regnum);
478 regcache_raw_read (regcache, regnum, record_full_get_loc (rec));
480 record_full_arch_list_add (rec);
485 /* Record the value of a region of memory whose address is ADDR and
486 length is LEN to record_full_arch_list. */
489 record_full_arch_list_add_mem (CORE_ADDR addr, int len)
491 struct record_full_entry *rec;
493 if (record_debug > 1)
494 fprintf_unfiltered (gdb_stdlog,
495 "Process record: add mem addr = %s len = %d to "
497 paddress (target_gdbarch (), addr), len);
499 if (!addr) /* FIXME: Why? Some arch must permit it... */
502 rec = record_full_mem_alloc (addr, len);
504 if (record_read_memory (target_gdbarch (), addr,
505 record_full_get_loc (rec), len))
507 record_full_mem_release (rec);
511 record_full_arch_list_add (rec);
516 /* Add a record_full_end type struct record_full_entry to
517 record_full_arch_list. */
520 record_full_arch_list_add_end (void)
522 struct record_full_entry *rec;
524 if (record_debug > 1)
525 fprintf_unfiltered (gdb_stdlog,
526 "Process record: add end to arch list.\n");
528 rec = record_full_end_alloc ();
529 rec->u.end.sigval = GDB_SIGNAL_0;
530 rec->u.end.insn_num = ++record_full_insn_count;
532 record_full_arch_list_add (rec);
538 record_full_check_insn_num (void)
540 if (record_full_insn_num == record_full_insn_max_num)
542 /* Ask user what to do. */
543 if (record_full_stop_at_limit)
545 if (!yquery (_("Do you want to auto delete previous execution "
546 "log entries when record/replay buffer becomes "
547 "full (record full stop-at-limit)?")))
548 error (_("Process record: stopped by user."));
549 record_full_stop_at_limit = 0;
555 record_full_arch_list_cleanups (void *ignore)
557 record_full_list_release (record_full_arch_list_tail);
560 /* Before inferior step (when GDB record the running message, inferior
561 only can step), GDB will call this function to record the values to
562 record_full_list. This function will call gdbarch_process_record to
563 record the running message of inferior and set them to
564 record_full_arch_list, and add it to record_full_list. */
567 record_full_message (struct regcache *regcache, enum gdb_signal signal)
570 struct gdbarch *gdbarch = get_regcache_arch (regcache);
571 struct cleanup *old_cleanups
572 = make_cleanup (record_full_arch_list_cleanups, 0);
574 record_full_arch_list_head = NULL;
575 record_full_arch_list_tail = NULL;
577 /* Check record_full_insn_num. */
578 record_full_check_insn_num ();
580 /* If gdb sends a signal value to target_resume,
581 save it in the 'end' field of the previous instruction.
583 Maybe process record should record what really happened,
584 rather than what gdb pretends has happened.
586 So if Linux delivered the signal to the child process during
587 the record mode, we will record it and deliver it again in
590 If user says "ignore this signal" during the record mode, then
591 it will be ignored again during the replay mode (no matter if
592 the user says something different, like "deliver this signal"
593 during the replay mode).
595 User should understand that nothing he does during the replay
596 mode will change the behavior of the child. If he tries,
597 then that is a user error.
599 But we should still deliver the signal to gdb during the replay,
600 if we delivered it during the recording. Therefore we should
601 record the signal during record_full_wait, not
602 record_full_resume. */
603 if (record_full_list != &record_full_first) /* FIXME better way to check */
605 gdb_assert (record_full_list->type == record_full_end);
606 record_full_list->u.end.sigval = signal;
609 if (signal == GDB_SIGNAL_0
610 || !gdbarch_process_record_signal_p (gdbarch))
611 ret = gdbarch_process_record (gdbarch,
613 regcache_read_pc (regcache));
615 ret = gdbarch_process_record_signal (gdbarch,
620 error (_("Process record: inferior program stopped."));
622 error (_("Process record: failed to record execution log."));
624 discard_cleanups (old_cleanups);
626 record_full_list->next = record_full_arch_list_head;
627 record_full_arch_list_head->prev = record_full_list;
628 record_full_list = record_full_arch_list_tail;
630 if (record_full_insn_num == record_full_insn_max_num)
631 record_full_list_release_first ();
633 record_full_insn_num++;
638 struct record_full_message_args {
639 struct regcache *regcache;
640 enum gdb_signal signal;
644 record_full_message_wrapper (void *args)
646 struct record_full_message_args *record_full_args
647 = (struct record_full_message_args *) args;
649 return record_full_message (record_full_args->regcache,
650 record_full_args->signal);
654 record_full_message_wrapper_safe (struct regcache *regcache,
655 enum gdb_signal signal)
657 struct record_full_message_args args;
659 args.regcache = regcache;
660 args.signal = signal;
662 return catch_errors (record_full_message_wrapper, &args, "",
666 /* Set to 1 if record_full_store_registers and record_full_xfer_partial
667 doesn't need record. */
669 static int record_full_gdb_operation_disable = 0;
672 record_full_gdb_operation_disable_set (void)
674 struct cleanup *old_cleanups = NULL;
677 make_cleanup_restore_integer (&record_full_gdb_operation_disable);
678 record_full_gdb_operation_disable = 1;
683 /* Flag set to TRUE for target_stopped_by_watchpoint. */
684 static enum target_stop_reason record_full_stop_reason
685 = TARGET_STOPPED_BY_NO_REASON;
687 /* Execute one instruction from the record log. Each instruction in
688 the log will be represented by an arbitrary sequence of register
689 entries and memory entries, followed by an 'end' entry. */
692 record_full_exec_insn (struct regcache *regcache,
693 struct gdbarch *gdbarch,
694 struct record_full_entry *entry)
698 case record_full_reg: /* reg */
700 gdb_byte reg[MAX_REGISTER_SIZE];
702 if (record_debug > 1)
703 fprintf_unfiltered (gdb_stdlog,
704 "Process record: record_full_reg %s to "
705 "inferior num = %d.\n",
706 host_address_to_string (entry),
709 regcache_cooked_read (regcache, entry->u.reg.num, reg);
710 regcache_cooked_write (regcache, entry->u.reg.num,
711 record_full_get_loc (entry));
712 memcpy (record_full_get_loc (entry), reg, entry->u.reg.len);
716 case record_full_mem: /* mem */
718 /* Nothing to do if the entry is flagged not_accessible. */
719 if (!entry->u.mem.mem_entry_not_accessible)
721 gdb_byte *mem = (gdb_byte *) xmalloc (entry->u.mem.len);
722 struct cleanup *cleanup = make_cleanup (xfree, mem);
724 if (record_debug > 1)
725 fprintf_unfiltered (gdb_stdlog,
726 "Process record: record_full_mem %s to "
727 "inferior addr = %s len = %d.\n",
728 host_address_to_string (entry),
729 paddress (gdbarch, entry->u.mem.addr),
732 if (record_read_memory (gdbarch,
733 entry->u.mem.addr, mem, entry->u.mem.len))
734 entry->u.mem.mem_entry_not_accessible = 1;
737 if (target_write_memory (entry->u.mem.addr,
738 record_full_get_loc (entry),
741 entry->u.mem.mem_entry_not_accessible = 1;
743 warning (_("Process record: error writing memory at "
744 "addr = %s len = %d."),
745 paddress (gdbarch, entry->u.mem.addr),
750 memcpy (record_full_get_loc (entry), mem,
753 /* We've changed memory --- check if a hardware
754 watchpoint should trap. Note that this
755 presently assumes the target beneath supports
756 continuable watchpoints. On non-continuable
757 watchpoints target, we'll want to check this
758 _before_ actually doing the memory change, and
759 not doing the change at all if the watchpoint
761 if (hardware_watchpoint_inserted_in_range
762 (get_regcache_aspace (regcache),
763 entry->u.mem.addr, entry->u.mem.len))
764 record_full_stop_reason = TARGET_STOPPED_BY_WATCHPOINT;
768 do_cleanups (cleanup);
775 static void record_full_restore (void);
777 /* Asynchronous signal handle registered as event loop source for when
778 we have pending events ready to be passed to the core. */
780 static struct async_event_handler *record_full_async_inferior_event_token;
783 record_full_async_inferior_event_handler (gdb_client_data data)
785 inferior_event_handler (INF_REG_EVENT, NULL);
788 /* Open the process record target. */
791 record_full_core_open_1 (const char *name, int from_tty)
793 struct regcache *regcache = get_current_regcache ();
794 int regnum = gdbarch_num_regs (get_regcache_arch (regcache));
797 /* Get record_full_core_regbuf. */
798 target_fetch_registers (regcache, -1);
799 record_full_core_regbuf = (gdb_byte *) xmalloc (MAX_REGISTER_SIZE * regnum);
800 for (i = 0; i < regnum; i ++)
801 regcache_raw_collect (regcache, i,
802 record_full_core_regbuf + MAX_REGISTER_SIZE * i);
804 /* Get record_full_core_start and record_full_core_end. */
805 if (build_section_table (core_bfd, &record_full_core_start,
806 &record_full_core_end))
808 xfree (record_full_core_regbuf);
809 record_full_core_regbuf = NULL;
810 error (_("\"%s\": Can't find sections: %s"),
811 bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ()));
814 push_target (&record_full_core_ops);
815 record_full_restore ();
818 /* "to_open" target method for 'live' processes. */
821 record_full_open_1 (const char *name, int from_tty)
824 fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open_1\n");
827 if (!target_has_execution)
828 error (_("Process record: the program is not being run."));
830 error (_("Process record target can't debug inferior in non-stop mode "
833 if (!gdbarch_process_record_p (target_gdbarch ()))
834 error (_("Process record: the current architecture doesn't support "
835 "record function."));
837 push_target (&record_full_ops);
840 static void record_full_init_record_breakpoints (void);
842 /* "to_open" target method. Open the process record target. */
845 record_full_open (const char *name, int from_tty)
847 struct target_ops *t;
850 fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open\n");
855 record_full_insn_num = 0;
856 record_full_insn_count = 0;
857 record_full_list = &record_full_first;
858 record_full_list->next = NULL;
861 record_full_core_open_1 (name, from_tty);
863 record_full_open_1 (name, from_tty);
865 /* Register extra event sources in the event loop. */
866 record_full_async_inferior_event_token
867 = create_async_event_handler (record_full_async_inferior_event_handler,
870 record_full_init_record_breakpoints ();
872 observer_notify_record_changed (current_inferior (), 1, "full", NULL);
875 /* "to_close" target method. Close the process record target. */
878 record_full_close (struct target_ops *self)
880 struct record_full_core_buf_entry *entry;
883 fprintf_unfiltered (gdb_stdlog, "Process record: record_full_close\n");
885 record_full_list_release (record_full_list);
887 /* Release record_full_core_regbuf. */
888 if (record_full_core_regbuf)
890 xfree (record_full_core_regbuf);
891 record_full_core_regbuf = NULL;
894 /* Release record_full_core_buf_list. */
895 if (record_full_core_buf_list)
897 for (entry = record_full_core_buf_list->prev; entry;
900 xfree (record_full_core_buf_list);
901 record_full_core_buf_list = entry;
903 record_full_core_buf_list = NULL;
906 if (record_full_async_inferior_event_token)
907 delete_async_event_handler (&record_full_async_inferior_event_token);
910 /* "to_async" target method. */
913 record_full_async (struct target_ops *ops, int enable)
916 mark_async_event_handler (record_full_async_inferior_event_token);
918 clear_async_event_handler (record_full_async_inferior_event_token);
920 ops->beneath->to_async (ops->beneath, enable);
923 static int record_full_resume_step = 0;
925 /* True if we've been resumed, and so each record_full_wait call should
926 advance execution. If this is false, record_full_wait will return a
927 TARGET_WAITKIND_IGNORE. */
928 static int record_full_resumed = 0;
930 /* The execution direction of the last resume we got. This is
931 necessary for async mode. Vis (order is not strictly accurate):
933 1. user has the global execution direction set to forward
934 2. user does a reverse-step command
935 3. record_full_resume is called with global execution direction
936 temporarily switched to reverse
937 4. GDB's execution direction is reverted back to forward
938 5. target record notifies event loop there's an event to handle
939 6. infrun asks the target which direction was it going, and switches
940 the global execution direction accordingly (to reverse)
941 7. infrun polls an event out of the record target, and handles it
942 8. GDB goes back to the event loop, and goto #4.
944 static enum exec_direction_kind record_full_execution_dir = EXEC_FORWARD;
946 /* "to_resume" target method. Resume the process record target. */
949 record_full_resume (struct target_ops *ops, ptid_t ptid, int step,
950 enum gdb_signal signal)
952 record_full_resume_step = step;
953 record_full_resumed = 1;
954 record_full_execution_dir = execution_direction;
956 if (!RECORD_FULL_IS_REPLAY)
958 struct gdbarch *gdbarch = target_thread_architecture (ptid);
960 record_full_message (get_current_regcache (), signal);
964 /* This is not hard single step. */
965 if (!gdbarch_software_single_step_p (gdbarch))
967 /* This is a normal continue. */
972 /* This arch supports soft single step. */
973 if (thread_has_single_step_breakpoints_set (inferior_thread ()))
975 /* This is a soft single step. */
976 record_full_resume_step = 1;
979 step = !insert_single_step_breakpoints (gdbarch);
983 /* Make sure the target beneath reports all signals. */
984 target_pass_signals (0, NULL);
986 ops->beneath->to_resume (ops->beneath, ptid, step, signal);
989 /* We are about to start executing the inferior (or simulate it),
990 let's register it with the event loop. */
991 if (target_can_async_p ())
995 /* "to_commit_resume" method for process record target. */
998 record_full_commit_resume (struct target_ops *ops)
1000 if (!RECORD_FULL_IS_REPLAY)
1001 ops->beneath->to_commit_resume (ops->beneath);
1004 static int record_full_get_sig = 0;
1006 /* SIGINT signal handler, registered by "to_wait" method. */
1009 record_full_sig_handler (int signo)
1012 fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\n");
1014 /* It will break the running inferior in replay mode. */
1015 record_full_resume_step = 1;
1017 /* It will let record_full_wait set inferior status to get the signal
1019 record_full_get_sig = 1;
1023 record_full_wait_cleanups (void *ignore)
1025 if (execution_direction == EXEC_REVERSE)
1027 if (record_full_list->next)
1028 record_full_list = record_full_list->next;
1031 record_full_list = record_full_list->prev;
1034 /* "to_wait" target method for process record target.
1036 In record mode, the target is always run in singlestep mode
1037 (even when gdb says to continue). The to_wait method intercepts
1038 the stop events and determines which ones are to be passed on to
1039 gdb. Most stop events are just singlestep events that gdb is not
1040 to know about, so the to_wait method just records them and keeps
1043 In replay mode, this function emulates the recorded execution log,
1044 one instruction at a time (forward or backward), and determines
1048 record_full_wait_1 (struct target_ops *ops,
1049 ptid_t ptid, struct target_waitstatus *status,
1052 struct cleanup *set_cleanups = record_full_gdb_operation_disable_set ();
1055 fprintf_unfiltered (gdb_stdlog,
1056 "Process record: record_full_wait "
1057 "record_full_resume_step = %d, "
1058 "record_full_resumed = %d, direction=%s\n",
1059 record_full_resume_step, record_full_resumed,
1060 record_full_execution_dir == EXEC_FORWARD
1061 ? "forward" : "reverse");
1063 if (!record_full_resumed)
1065 gdb_assert ((options & TARGET_WNOHANG) != 0);
1067 /* No interesting event. */
1068 status->kind = TARGET_WAITKIND_IGNORE;
1069 return minus_one_ptid;
1072 record_full_get_sig = 0;
1073 signal (SIGINT, record_full_sig_handler);
1075 record_full_stop_reason = TARGET_STOPPED_BY_NO_REASON;
1077 if (!RECORD_FULL_IS_REPLAY && ops != &record_full_core_ops)
1079 if (record_full_resume_step)
1081 /* This is a single step. */
1082 return ops->beneath->to_wait (ops->beneath, ptid, status, options);
1086 /* This is not a single step. */
1089 struct gdbarch *gdbarch = target_thread_architecture (inferior_ptid);
1093 struct thread_info *tp;
1095 ret = ops->beneath->to_wait (ops->beneath, ptid, status, options);
1096 if (status->kind == TARGET_WAITKIND_IGNORE)
1099 fprintf_unfiltered (gdb_stdlog,
1100 "Process record: record_full_wait "
1101 "target beneath not done yet\n");
1105 ALL_NON_EXITED_THREADS (tp)
1106 delete_single_step_breakpoints (tp);
1108 if (record_full_resume_step)
1111 /* Is this a SIGTRAP? */
1112 if (status->kind == TARGET_WAITKIND_STOPPED
1113 && status->value.sig == GDB_SIGNAL_TRAP)
1115 struct regcache *regcache;
1116 struct address_space *aspace;
1117 enum target_stop_reason *stop_reason_p
1118 = &record_full_stop_reason;
1120 /* Yes -- this is likely our single-step finishing,
1121 but check if there's any reason the core would be
1122 interested in the event. */
1124 registers_changed ();
1125 regcache = get_current_regcache ();
1126 tmp_pc = regcache_read_pc (regcache);
1127 aspace = get_regcache_aspace (regcache);
1129 if (target_stopped_by_watchpoint ())
1131 /* Always interested in watchpoints. */
1133 else if (record_check_stopped_by_breakpoint (aspace, tmp_pc,
1136 /* There is a breakpoint here. Let the core
1141 /* This is a single-step trap. Record the
1142 insn and issue another step.
1143 FIXME: this part can be a random SIGTRAP too.
1144 But GDB cannot handle it. */
1147 if (!record_full_message_wrapper_safe (regcache,
1150 status->kind = TARGET_WAITKIND_STOPPED;
1151 status->value.sig = GDB_SIGNAL_0;
1155 if (gdbarch_software_single_step_p (gdbarch))
1157 /* Try to insert the software single step breakpoint.
1158 If insert success, set step to 0. */
1159 set_executing (inferior_ptid, 0);
1160 reinit_frame_cache ();
1162 step = !insert_single_step_breakpoints (gdbarch);
1164 set_executing (inferior_ptid, 1);
1168 fprintf_unfiltered (gdb_stdlog,
1169 "Process record: record_full_wait "
1170 "issuing one more step in the "
1171 "target beneath\n");
1172 ops->beneath->to_resume (ops->beneath, ptid, step,
1174 ops->beneath->to_commit_resume (ops->beneath);
1179 /* The inferior is broken by a breakpoint or a signal. */
1188 struct regcache *regcache = get_current_regcache ();
1189 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1190 struct address_space *aspace = get_regcache_aspace (regcache);
1191 int continue_flag = 1;
1192 int first_record_full_end = 1;
1193 struct cleanup *old_cleanups
1194 = make_cleanup (record_full_wait_cleanups, 0);
1197 record_full_stop_reason = TARGET_STOPPED_BY_NO_REASON;
1198 status->kind = TARGET_WAITKIND_STOPPED;
1200 /* Check breakpoint when forward execute. */
1201 if (execution_direction == EXEC_FORWARD)
1203 tmp_pc = regcache_read_pc (regcache);
1204 if (record_check_stopped_by_breakpoint (aspace, tmp_pc,
1205 &record_full_stop_reason))
1208 fprintf_unfiltered (gdb_stdlog,
1209 "Process record: break at %s.\n",
1210 paddress (gdbarch, tmp_pc));
1215 /* If GDB is in terminal_inferior mode, it will not get the signal.
1216 And in GDB replay mode, GDB doesn't need to be in terminal_inferior
1217 mode, because inferior will not executed.
1218 Then set it to terminal_ours to make GDB get the signal. */
1219 target_terminal_ours ();
1221 /* In EXEC_FORWARD mode, record_full_list points to the tail of prev
1223 if (execution_direction == EXEC_FORWARD && record_full_list->next)
1224 record_full_list = record_full_list->next;
1226 /* Loop over the record_full_list, looking for the next place to
1230 /* Check for beginning and end of log. */
1231 if (execution_direction == EXEC_REVERSE
1232 && record_full_list == &record_full_first)
1234 /* Hit beginning of record log in reverse. */
1235 status->kind = TARGET_WAITKIND_NO_HISTORY;
1238 if (execution_direction != EXEC_REVERSE && !record_full_list->next)
1240 /* Hit end of record log going forward. */
1241 status->kind = TARGET_WAITKIND_NO_HISTORY;
1245 record_full_exec_insn (regcache, gdbarch, record_full_list);
1247 if (record_full_list->type == record_full_end)
1249 if (record_debug > 1)
1250 fprintf_unfiltered (gdb_stdlog,
1251 "Process record: record_full_end %s to "
1253 host_address_to_string (record_full_list));
1255 if (first_record_full_end && execution_direction == EXEC_REVERSE)
1257 /* When reverse excute, the first record_full_end is the
1258 part of current instruction. */
1259 first_record_full_end = 0;
1263 /* In EXEC_REVERSE mode, this is the record_full_end of prev
1265 In EXEC_FORWARD mode, this is the record_full_end of
1266 current instruction. */
1268 if (record_full_resume_step)
1270 if (record_debug > 1)
1271 fprintf_unfiltered (gdb_stdlog,
1272 "Process record: step.\n");
1276 /* check breakpoint */
1277 tmp_pc = regcache_read_pc (regcache);
1278 if (record_check_stopped_by_breakpoint (aspace, tmp_pc,
1279 &record_full_stop_reason))
1282 fprintf_unfiltered (gdb_stdlog,
1283 "Process record: break "
1285 paddress (gdbarch, tmp_pc));
1290 if (record_full_stop_reason == TARGET_STOPPED_BY_WATCHPOINT)
1293 fprintf_unfiltered (gdb_stdlog,
1294 "Process record: hit hw "
1298 /* Check target signal */
1299 if (record_full_list->u.end.sigval != GDB_SIGNAL_0)
1300 /* FIXME: better way to check */
1307 if (execution_direction == EXEC_REVERSE)
1309 if (record_full_list->prev)
1310 record_full_list = record_full_list->prev;
1314 if (record_full_list->next)
1315 record_full_list = record_full_list->next;
1319 while (continue_flag);
1322 if (record_full_get_sig)
1323 status->value.sig = GDB_SIGNAL_INT;
1324 else if (record_full_list->u.end.sigval != GDB_SIGNAL_0)
1325 /* FIXME: better way to check */
1326 status->value.sig = record_full_list->u.end.sigval;
1328 status->value.sig = GDB_SIGNAL_TRAP;
1330 discard_cleanups (old_cleanups);
1333 signal (SIGINT, handle_sigint);
1335 do_cleanups (set_cleanups);
1336 return inferior_ptid;
1340 record_full_wait (struct target_ops *ops,
1341 ptid_t ptid, struct target_waitstatus *status,
1346 return_ptid = record_full_wait_1 (ops, ptid, status, options);
1347 if (status->kind != TARGET_WAITKIND_IGNORE)
1349 /* We're reporting a stop. Make sure any spurious
1350 target_wait(WNOHANG) doesn't advance the target until the
1351 core wants us resumed again. */
1352 record_full_resumed = 0;
1358 record_full_stopped_by_watchpoint (struct target_ops *ops)
1360 if (RECORD_FULL_IS_REPLAY)
1361 return record_full_stop_reason == TARGET_STOPPED_BY_WATCHPOINT;
1363 return ops->beneath->to_stopped_by_watchpoint (ops->beneath);
1367 record_full_stopped_data_address (struct target_ops *ops, CORE_ADDR *addr_p)
1369 if (RECORD_FULL_IS_REPLAY)
1372 return ops->beneath->to_stopped_data_address (ops->beneath, addr_p);
1375 /* The to_stopped_by_sw_breakpoint method of target record-full. */
1378 record_full_stopped_by_sw_breakpoint (struct target_ops *ops)
1380 return record_full_stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT;
1383 /* The to_supports_stopped_by_sw_breakpoint method of target
1387 record_full_supports_stopped_by_sw_breakpoint (struct target_ops *ops)
1392 /* The to_stopped_by_hw_breakpoint method of target record-full. */
1395 record_full_stopped_by_hw_breakpoint (struct target_ops *ops)
1397 return record_full_stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT;
1400 /* The to_supports_stopped_by_sw_breakpoint method of target
1404 record_full_supports_stopped_by_hw_breakpoint (struct target_ops *ops)
1409 /* Record registers change (by user or by GDB) to list as an instruction. */
1412 record_full_registers_change (struct regcache *regcache, int regnum)
1414 /* Check record_full_insn_num. */
1415 record_full_check_insn_num ();
1417 record_full_arch_list_head = NULL;
1418 record_full_arch_list_tail = NULL;
1424 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
1426 if (record_full_arch_list_add_reg (regcache, i))
1428 record_full_list_release (record_full_arch_list_tail);
1429 error (_("Process record: failed to record execution log."));
1435 if (record_full_arch_list_add_reg (regcache, regnum))
1437 record_full_list_release (record_full_arch_list_tail);
1438 error (_("Process record: failed to record execution log."));
1441 if (record_full_arch_list_add_end ())
1443 record_full_list_release (record_full_arch_list_tail);
1444 error (_("Process record: failed to record execution log."));
1446 record_full_list->next = record_full_arch_list_head;
1447 record_full_arch_list_head->prev = record_full_list;
1448 record_full_list = record_full_arch_list_tail;
1450 if (record_full_insn_num == record_full_insn_max_num)
1451 record_full_list_release_first ();
1453 record_full_insn_num++;
1456 /* "to_store_registers" method for process record target. */
1459 record_full_store_registers (struct target_ops *ops,
1460 struct regcache *regcache,
1463 if (!record_full_gdb_operation_disable)
1465 if (RECORD_FULL_IS_REPLAY)
1469 /* Let user choose if he wants to write register or not. */
1472 query (_("Because GDB is in replay mode, changing the "
1473 "value of a register will make the execution "
1474 "log unusable from this point onward. "
1475 "Change all registers?"));
1478 query (_("Because GDB is in replay mode, changing the value "
1479 "of a register will make the execution log unusable "
1480 "from this point onward. Change register %s?"),
1481 gdbarch_register_name (get_regcache_arch (regcache),
1486 /* Invalidate the value of regcache that was set in function
1487 "regcache_raw_write". */
1493 i < gdbarch_num_regs (get_regcache_arch (regcache));
1495 regcache_invalidate (regcache, i);
1498 regcache_invalidate (regcache, regno);
1500 error (_("Process record canceled the operation."));
1503 /* Destroy the record from here forward. */
1504 record_full_list_release_following (record_full_list);
1507 record_full_registers_change (regcache, regno);
1509 ops->beneath->to_store_registers (ops->beneath, regcache, regno);
1512 /* "to_xfer_partial" method. Behavior is conditional on
1513 RECORD_FULL_IS_REPLAY.
1514 In replay mode, we cannot write memory unles we are willing to
1515 invalidate the record/replay log from this point forward. */
1517 static enum target_xfer_status
1518 record_full_xfer_partial (struct target_ops *ops, enum target_object object,
1519 const char *annex, gdb_byte *readbuf,
1520 const gdb_byte *writebuf, ULONGEST offset,
1521 ULONGEST len, ULONGEST *xfered_len)
1523 if (!record_full_gdb_operation_disable
1524 && (object == TARGET_OBJECT_MEMORY
1525 || object == TARGET_OBJECT_RAW_MEMORY) && writebuf)
1527 if (RECORD_FULL_IS_REPLAY)
1529 /* Let user choose if he wants to write memory or not. */
1530 if (!query (_("Because GDB is in replay mode, writing to memory "
1531 "will make the execution log unusable from this "
1532 "point onward. Write memory at address %s?"),
1533 paddress (target_gdbarch (), offset)))
1534 error (_("Process record canceled the operation."));
1536 /* Destroy the record from here forward. */
1537 record_full_list_release_following (record_full_list);
1540 /* Check record_full_insn_num */
1541 record_full_check_insn_num ();
1543 /* Record registers change to list as an instruction. */
1544 record_full_arch_list_head = NULL;
1545 record_full_arch_list_tail = NULL;
1546 if (record_full_arch_list_add_mem (offset, len))
1548 record_full_list_release (record_full_arch_list_tail);
1550 fprintf_unfiltered (gdb_stdlog,
1551 "Process record: failed to record "
1553 return TARGET_XFER_E_IO;
1555 if (record_full_arch_list_add_end ())
1557 record_full_list_release (record_full_arch_list_tail);
1559 fprintf_unfiltered (gdb_stdlog,
1560 "Process record: failed to record "
1562 return TARGET_XFER_E_IO;
1564 record_full_list->next = record_full_arch_list_head;
1565 record_full_arch_list_head->prev = record_full_list;
1566 record_full_list = record_full_arch_list_tail;
1568 if (record_full_insn_num == record_full_insn_max_num)
1569 record_full_list_release_first ();
1571 record_full_insn_num++;
1574 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1575 readbuf, writebuf, offset,
1579 /* This structure represents a breakpoint inserted while the record
1580 target is active. We use this to know when to install/remove
1581 breakpoints in/from the target beneath. For example, a breakpoint
1582 may be inserted while recording, but removed when not replaying nor
1583 recording. In that case, the breakpoint had not been inserted on
1584 the target beneath, so we should not try to remove it there. */
1586 struct record_full_breakpoint
1588 /* The address and address space the breakpoint was set at. */
1589 struct address_space *address_space;
1592 /* True when the breakpoint has been also installed in the target
1593 beneath. This will be false for breakpoints set during replay or
1595 int in_target_beneath;
1598 typedef struct record_full_breakpoint *record_full_breakpoint_p;
1599 DEF_VEC_P(record_full_breakpoint_p);
1601 /* The list of breakpoints inserted while the record target is
1603 VEC(record_full_breakpoint_p) *record_full_breakpoints = NULL;
1606 record_full_sync_record_breakpoints (struct bp_location *loc, void *data)
1608 if (loc->loc_type != bp_loc_software_breakpoint)
1613 struct record_full_breakpoint *bp = XNEW (struct record_full_breakpoint);
1615 bp->addr = loc->target_info.placed_address;
1616 bp->address_space = loc->target_info.placed_address_space;
1618 bp->in_target_beneath = 1;
1620 VEC_safe_push (record_full_breakpoint_p, record_full_breakpoints, bp);
1624 /* Sync existing breakpoints to record_full_breakpoints. */
1627 record_full_init_record_breakpoints (void)
1629 VEC_free (record_full_breakpoint_p, record_full_breakpoints);
1631 iterate_over_bp_locations (record_full_sync_record_breakpoints);
1634 /* Behavior is conditional on RECORD_FULL_IS_REPLAY. We will not actually
1635 insert or remove breakpoints in the real target when replaying, nor
1639 record_full_insert_breakpoint (struct target_ops *ops,
1640 struct gdbarch *gdbarch,
1641 struct bp_target_info *bp_tgt)
1643 struct record_full_breakpoint *bp;
1644 int in_target_beneath = 0;
1647 if (!RECORD_FULL_IS_REPLAY)
1649 /* When recording, we currently always single-step, so we don't
1650 really need to install regular breakpoints in the inferior.
1651 However, we do have to insert software single-step
1652 breakpoints, in case the target can't hardware step. To keep
1653 things simple, we always insert. */
1654 struct cleanup *old_cleanups;
1657 old_cleanups = record_full_gdb_operation_disable_set ();
1658 ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt);
1659 do_cleanups (old_cleanups);
1664 in_target_beneath = 1;
1667 /* Use the existing entries if found in order to avoid duplication
1668 in record_full_breakpoints. */
1671 VEC_iterate (record_full_breakpoint_p,
1672 record_full_breakpoints, ix, bp);
1675 if (bp->addr == bp_tgt->placed_address
1676 && bp->address_space == bp_tgt->placed_address_space)
1678 gdb_assert (bp->in_target_beneath == in_target_beneath);
1683 bp = XNEW (struct record_full_breakpoint);
1684 bp->addr = bp_tgt->placed_address;
1685 bp->address_space = bp_tgt->placed_address_space;
1686 bp->in_target_beneath = in_target_beneath;
1687 VEC_safe_push (record_full_breakpoint_p, record_full_breakpoints, bp);
1691 /* "to_remove_breakpoint" method for process record target. */
1694 record_full_remove_breakpoint (struct target_ops *ops,
1695 struct gdbarch *gdbarch,
1696 struct bp_target_info *bp_tgt,
1697 enum remove_bp_reason reason)
1699 struct record_full_breakpoint *bp;
1703 VEC_iterate (record_full_breakpoint_p,
1704 record_full_breakpoints, ix, bp);
1707 if (bp->addr == bp_tgt->placed_address
1708 && bp->address_space == bp_tgt->placed_address_space)
1710 if (bp->in_target_beneath)
1712 struct cleanup *old_cleanups;
1715 old_cleanups = record_full_gdb_operation_disable_set ();
1716 ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch,
1718 do_cleanups (old_cleanups);
1724 if (reason == REMOVE_BREAKPOINT)
1726 VEC_unordered_remove (record_full_breakpoint_p,
1727 record_full_breakpoints, ix);
1733 gdb_assert_not_reached ("removing unknown breakpoint");
1736 /* "to_can_execute_reverse" method for process record target. */
1739 record_full_can_execute_reverse (struct target_ops *self)
1744 /* "to_get_bookmark" method for process record and prec over core. */
1747 record_full_get_bookmark (struct target_ops *self, const char *args,
1752 /* Return stringified form of instruction count. */
1753 if (record_full_list && record_full_list->type == record_full_end)
1754 ret = xstrdup (pulongest (record_full_list->u.end.insn_num));
1759 fprintf_unfiltered (gdb_stdlog,
1760 "record_full_get_bookmark returns %s\n", ret);
1762 fprintf_unfiltered (gdb_stdlog,
1763 "record_full_get_bookmark returns NULL\n");
1765 return (gdb_byte *) ret;
1768 /* "to_goto_bookmark" method for process record and prec over core. */
1771 record_full_goto_bookmark (struct target_ops *self,
1772 const gdb_byte *raw_bookmark, int from_tty)
1774 const char *bookmark = (const char *) raw_bookmark;
1775 struct cleanup *cleanup = make_cleanup (null_cleanup, NULL);
1778 fprintf_unfiltered (gdb_stdlog,
1779 "record_full_goto_bookmark receives %s\n", bookmark);
1781 if (bookmark[0] == '\'' || bookmark[0] == '\"')
1785 if (bookmark[strlen (bookmark) - 1] != bookmark[0])
1786 error (_("Unbalanced quotes: %s"), bookmark);
1789 copy = savestring (bookmark + 1, strlen (bookmark) - 2);
1790 make_cleanup (xfree, copy);
1794 record_goto (bookmark);
1796 do_cleanups (cleanup);
1799 static enum exec_direction_kind
1800 record_full_execution_direction (struct target_ops *self)
1802 return record_full_execution_dir;
1806 record_full_info (struct target_ops *self)
1808 struct record_full_entry *p;
1810 if (RECORD_FULL_IS_REPLAY)
1811 printf_filtered (_("Replay mode:\n"));
1813 printf_filtered (_("Record mode:\n"));
1815 /* Find entry for first actual instruction in the log. */
1816 for (p = record_full_first.next;
1817 p != NULL && p->type != record_full_end;
1821 /* Do we have a log at all? */
1822 if (p != NULL && p->type == record_full_end)
1824 /* Display instruction number for first instruction in the log. */
1825 printf_filtered (_("Lowest recorded instruction number is %s.\n"),
1826 pulongest (p->u.end.insn_num));
1828 /* If in replay mode, display where we are in the log. */
1829 if (RECORD_FULL_IS_REPLAY)
1830 printf_filtered (_("Current instruction number is %s.\n"),
1831 pulongest (record_full_list->u.end.insn_num));
1833 /* Display instruction number for last instruction in the log. */
1834 printf_filtered (_("Highest recorded instruction number is %s.\n"),
1835 pulongest (record_full_insn_count));
1837 /* Display log count. */
1838 printf_filtered (_("Log contains %u instructions.\n"),
1839 record_full_insn_num);
1842 printf_filtered (_("No instructions have been logged.\n"));
1844 /* Display max log size. */
1845 printf_filtered (_("Max logged instructions is %u.\n"),
1846 record_full_insn_max_num);
1849 /* The "to_record_delete" target method. */
1852 record_full_delete (struct target_ops *self)
1854 record_full_list_release_following (record_full_list);
1857 /* The "to_record_is_replaying" target method. */
1860 record_full_is_replaying (struct target_ops *self, ptid_t ptid)
1862 return RECORD_FULL_IS_REPLAY;
1865 /* The "to_record_will_replay" target method. */
1868 record_full_will_replay (struct target_ops *self, ptid_t ptid, int dir)
1870 /* We can currently only record when executing forwards. Should we be able
1871 to record when executing backwards on targets that support reverse
1872 execution, this needs to be changed. */
1874 return RECORD_FULL_IS_REPLAY || dir == EXEC_REVERSE;
1877 /* Go to a specific entry. */
1880 record_full_goto_entry (struct record_full_entry *p)
1883 error (_("Target insn not found."));
1884 else if (p == record_full_list)
1885 error (_("Already at target insn."));
1886 else if (p->u.end.insn_num > record_full_list->u.end.insn_num)
1888 printf_filtered (_("Go forward to insn number %s\n"),
1889 pulongest (p->u.end.insn_num));
1890 record_full_goto_insn (p, EXEC_FORWARD);
1894 printf_filtered (_("Go backward to insn number %s\n"),
1895 pulongest (p->u.end.insn_num));
1896 record_full_goto_insn (p, EXEC_REVERSE);
1899 registers_changed ();
1900 reinit_frame_cache ();
1901 stop_pc = regcache_read_pc (get_current_regcache ());
1902 print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1);
1905 /* The "to_goto_record_begin" target method. */
1908 record_full_goto_begin (struct target_ops *self)
1910 struct record_full_entry *p = NULL;
1912 for (p = &record_full_first; p != NULL; p = p->next)
1913 if (p->type == record_full_end)
1916 record_full_goto_entry (p);
1919 /* The "to_goto_record_end" target method. */
1922 record_full_goto_end (struct target_ops *self)
1924 struct record_full_entry *p = NULL;
1926 for (p = record_full_list; p->next != NULL; p = p->next)
1928 for (; p!= NULL; p = p->prev)
1929 if (p->type == record_full_end)
1932 record_full_goto_entry (p);
1935 /* The "to_goto_record" target method. */
1938 record_full_goto (struct target_ops *self, ULONGEST target_insn)
1940 struct record_full_entry *p = NULL;
1942 for (p = &record_full_first; p != NULL; p = p->next)
1943 if (p->type == record_full_end && p->u.end.insn_num == target_insn)
1946 record_full_goto_entry (p);
1949 /* The "to_record_stop_replaying" target method. */
1952 record_full_stop_replaying (struct target_ops *self)
1954 record_full_goto_end (self);
1958 init_record_full_ops (void)
1960 record_full_ops.to_shortname = "record-full";
1961 record_full_ops.to_longname = "Process record and replay target";
1962 record_full_ops.to_doc =
1963 "Log program while executing and replay execution from log.";
1964 record_full_ops.to_open = record_full_open;
1965 record_full_ops.to_close = record_full_close;
1966 record_full_ops.to_async = record_full_async;
1967 record_full_ops.to_resume = record_full_resume;
1968 record_full_ops.to_commit_resume = record_full_commit_resume;
1969 record_full_ops.to_wait = record_full_wait;
1970 record_full_ops.to_disconnect = record_disconnect;
1971 record_full_ops.to_detach = record_detach;
1972 record_full_ops.to_mourn_inferior = record_mourn_inferior;
1973 record_full_ops.to_kill = record_kill;
1974 record_full_ops.to_store_registers = record_full_store_registers;
1975 record_full_ops.to_xfer_partial = record_full_xfer_partial;
1976 record_full_ops.to_insert_breakpoint = record_full_insert_breakpoint;
1977 record_full_ops.to_remove_breakpoint = record_full_remove_breakpoint;
1978 record_full_ops.to_stopped_by_watchpoint = record_full_stopped_by_watchpoint;
1979 record_full_ops.to_stopped_data_address = record_full_stopped_data_address;
1980 record_full_ops.to_stopped_by_sw_breakpoint
1981 = record_full_stopped_by_sw_breakpoint;
1982 record_full_ops.to_supports_stopped_by_sw_breakpoint
1983 = record_full_supports_stopped_by_sw_breakpoint;
1984 record_full_ops.to_stopped_by_hw_breakpoint
1985 = record_full_stopped_by_hw_breakpoint;
1986 record_full_ops.to_supports_stopped_by_hw_breakpoint
1987 = record_full_supports_stopped_by_hw_breakpoint;
1988 record_full_ops.to_can_execute_reverse = record_full_can_execute_reverse;
1989 record_full_ops.to_stratum = record_stratum;
1990 /* Add bookmark target methods. */
1991 record_full_ops.to_get_bookmark = record_full_get_bookmark;
1992 record_full_ops.to_goto_bookmark = record_full_goto_bookmark;
1993 record_full_ops.to_execution_direction = record_full_execution_direction;
1994 record_full_ops.to_info_record = record_full_info;
1995 record_full_ops.to_save_record = record_full_save;
1996 record_full_ops.to_delete_record = record_full_delete;
1997 record_full_ops.to_record_is_replaying = record_full_is_replaying;
1998 record_full_ops.to_record_will_replay = record_full_will_replay;
1999 record_full_ops.to_record_stop_replaying = record_full_stop_replaying;
2000 record_full_ops.to_goto_record_begin = record_full_goto_begin;
2001 record_full_ops.to_goto_record_end = record_full_goto_end;
2002 record_full_ops.to_goto_record = record_full_goto;
2003 record_full_ops.to_magic = OPS_MAGIC;
2006 /* "to_resume" method for prec over corefile. */
2009 record_full_core_resume (struct target_ops *ops, ptid_t ptid, int step,
2010 enum gdb_signal signal)
2012 record_full_resume_step = step;
2013 record_full_resumed = 1;
2014 record_full_execution_dir = execution_direction;
2016 /* We are about to start executing the inferior (or simulate it),
2017 let's register it with the event loop. */
2018 if (target_can_async_p ())
2022 /* "to_kill" method for prec over corefile. */
2025 record_full_core_kill (struct target_ops *ops)
2028 fprintf_unfiltered (gdb_stdlog, "Process record: record_full_core_kill\n");
2030 unpush_target (&record_full_core_ops);
2033 /* "to_fetch_registers" method for prec over corefile. */
2036 record_full_core_fetch_registers (struct target_ops *ops,
2037 struct regcache *regcache,
2042 int num = gdbarch_num_regs (get_regcache_arch (regcache));
2045 for (i = 0; i < num; i ++)
2046 regcache_raw_supply (regcache, i,
2047 record_full_core_regbuf + MAX_REGISTER_SIZE * i);
2050 regcache_raw_supply (regcache, regno,
2051 record_full_core_regbuf + MAX_REGISTER_SIZE * regno);
2054 /* "to_prepare_to_store" method for prec over corefile. */
2057 record_full_core_prepare_to_store (struct target_ops *self,
2058 struct regcache *regcache)
2062 /* "to_store_registers" method for prec over corefile. */
2065 record_full_core_store_registers (struct target_ops *ops,
2066 struct regcache *regcache,
2069 if (record_full_gdb_operation_disable)
2070 regcache_raw_collect (regcache, regno,
2071 record_full_core_regbuf + MAX_REGISTER_SIZE * regno);
2073 error (_("You can't do that without a process to debug."));
2076 /* "to_xfer_partial" method for prec over corefile. */
2078 static enum target_xfer_status
2079 record_full_core_xfer_partial (struct target_ops *ops,
2080 enum target_object object,
2081 const char *annex, gdb_byte *readbuf,
2082 const gdb_byte *writebuf, ULONGEST offset,
2083 ULONGEST len, ULONGEST *xfered_len)
2085 if (object == TARGET_OBJECT_MEMORY)
2087 if (record_full_gdb_operation_disable || !writebuf)
2089 struct target_section *p;
2091 for (p = record_full_core_start; p < record_full_core_end; p++)
2093 if (offset >= p->addr)
2095 struct record_full_core_buf_entry *entry;
2096 ULONGEST sec_offset;
2098 if (offset >= p->endaddr)
2101 if (offset + len > p->endaddr)
2102 len = p->endaddr - offset;
2104 sec_offset = offset - p->addr;
2106 /* Read readbuf or write writebuf p, offset, len. */
2108 if (p->the_bfd_section->flags & SEC_CONSTRUCTOR
2109 || (p->the_bfd_section->flags & SEC_HAS_CONTENTS) == 0)
2112 memset (readbuf, 0, len);
2115 return TARGET_XFER_OK;
2117 /* Get record_full_core_buf_entry. */
2118 for (entry = record_full_core_buf_list; entry;
2119 entry = entry->prev)
2126 /* Add a new entry. */
2127 entry = XNEW (struct record_full_core_buf_entry);
2129 if (!bfd_malloc_and_get_section
2130 (p->the_bfd_section->owner,
2135 return TARGET_XFER_EOF;
2137 entry->prev = record_full_core_buf_list;
2138 record_full_core_buf_list = entry;
2141 memcpy (entry->buf + sec_offset, writebuf,
2147 return ops->beneath->to_xfer_partial (ops->beneath,
2153 memcpy (readbuf, entry->buf + sec_offset,
2158 return TARGET_XFER_OK;
2162 return TARGET_XFER_E_IO;
2165 error (_("You can't do that without a process to debug."));
2168 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
2169 readbuf, writebuf, offset, len,
2173 /* "to_insert_breakpoint" method for prec over corefile. */
2176 record_full_core_insert_breakpoint (struct target_ops *ops,
2177 struct gdbarch *gdbarch,
2178 struct bp_target_info *bp_tgt)
2183 /* "to_remove_breakpoint" method for prec over corefile. */
2186 record_full_core_remove_breakpoint (struct target_ops *ops,
2187 struct gdbarch *gdbarch,
2188 struct bp_target_info *bp_tgt,
2189 enum remove_bp_reason reason)
2194 /* "to_has_execution" method for prec over corefile. */
2197 record_full_core_has_execution (struct target_ops *ops, ptid_t the_ptid)
2203 init_record_full_core_ops (void)
2205 record_full_core_ops.to_shortname = "record-core";
2206 record_full_core_ops.to_longname = "Process record and replay target";
2207 record_full_core_ops.to_doc =
2208 "Log program while executing and replay execution from log.";
2209 record_full_core_ops.to_open = record_full_open;
2210 record_full_core_ops.to_close = record_full_close;
2211 record_full_core_ops.to_async = record_full_async;
2212 record_full_core_ops.to_resume = record_full_core_resume;
2213 record_full_core_ops.to_wait = record_full_wait;
2214 record_full_core_ops.to_kill = record_full_core_kill;
2215 record_full_core_ops.to_fetch_registers = record_full_core_fetch_registers;
2216 record_full_core_ops.to_prepare_to_store = record_full_core_prepare_to_store;
2217 record_full_core_ops.to_store_registers = record_full_core_store_registers;
2218 record_full_core_ops.to_xfer_partial = record_full_core_xfer_partial;
2219 record_full_core_ops.to_insert_breakpoint
2220 = record_full_core_insert_breakpoint;
2221 record_full_core_ops.to_remove_breakpoint
2222 = record_full_core_remove_breakpoint;
2223 record_full_core_ops.to_stopped_by_watchpoint
2224 = record_full_stopped_by_watchpoint;
2225 record_full_core_ops.to_stopped_data_address
2226 = record_full_stopped_data_address;
2227 record_full_core_ops.to_stopped_by_sw_breakpoint
2228 = record_full_stopped_by_sw_breakpoint;
2229 record_full_core_ops.to_supports_stopped_by_sw_breakpoint
2230 = record_full_supports_stopped_by_sw_breakpoint;
2231 record_full_core_ops.to_stopped_by_hw_breakpoint
2232 = record_full_stopped_by_hw_breakpoint;
2233 record_full_core_ops.to_supports_stopped_by_hw_breakpoint
2234 = record_full_supports_stopped_by_hw_breakpoint;
2235 record_full_core_ops.to_can_execute_reverse
2236 = record_full_can_execute_reverse;
2237 record_full_core_ops.to_has_execution = record_full_core_has_execution;
2238 record_full_core_ops.to_stratum = record_stratum;
2239 /* Add bookmark target methods. */
2240 record_full_core_ops.to_get_bookmark = record_full_get_bookmark;
2241 record_full_core_ops.to_goto_bookmark = record_full_goto_bookmark;
2242 record_full_core_ops.to_execution_direction
2243 = record_full_execution_direction;
2244 record_full_core_ops.to_info_record = record_full_info;
2245 record_full_core_ops.to_delete_record = record_full_delete;
2246 record_full_core_ops.to_record_is_replaying = record_full_is_replaying;
2247 record_full_core_ops.to_record_will_replay = record_full_will_replay;
2248 record_full_core_ops.to_goto_record_begin = record_full_goto_begin;
2249 record_full_core_ops.to_goto_record_end = record_full_goto_end;
2250 record_full_core_ops.to_goto_record = record_full_goto;
2251 record_full_core_ops.to_magic = OPS_MAGIC;
2254 /* Record log save-file format
2255 Version 1 (never released)
2258 4 bytes: magic number htonl(0x20090829).
2259 NOTE: be sure to change whenever this file format changes!
2263 1 byte: record type (record_full_end, see enum record_full_type).
2265 1 byte: record type (record_full_reg, see enum record_full_type).
2266 8 bytes: register id (network byte order).
2267 MAX_REGISTER_SIZE bytes: register value.
2269 1 byte: record type (record_full_mem, see enum record_full_type).
2270 8 bytes: memory length (network byte order).
2271 8 bytes: memory address (network byte order).
2272 n bytes: memory value (n == memory length).
2275 4 bytes: magic number netorder32(0x20091016).
2276 NOTE: be sure to change whenever this file format changes!
2280 1 byte: record type (record_full_end, see enum record_full_type).
2282 4 bytes: instruction count
2284 1 byte: record type (record_full_reg, see enum record_full_type).
2285 4 bytes: register id (network byte order).
2286 n bytes: register value (n == actual register size).
2287 (eg. 4 bytes for x86 general registers).
2289 1 byte: record type (record_full_mem, see enum record_full_type).
2290 4 bytes: memory length (network byte order).
2291 8 bytes: memory address (network byte order).
2292 n bytes: memory value (n == memory length).
2296 /* bfdcore_read -- read bytes from a core file section. */
2299 bfdcore_read (bfd *obfd, asection *osec, void *buf, int len, int *offset)
2301 int ret = bfd_get_section_contents (obfd, osec, buf, *offset, len);
2306 error (_("Failed to read %d bytes from core file %s ('%s')."),
2307 len, bfd_get_filename (obfd),
2308 bfd_errmsg (bfd_get_error ()));
2311 static inline uint64_t
2312 netorder64 (uint64_t input)
2316 store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret),
2317 BFD_ENDIAN_BIG, input);
2321 static inline uint32_t
2322 netorder32 (uint32_t input)
2326 store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret),
2327 BFD_ENDIAN_BIG, input);
2331 static inline uint16_t
2332 netorder16 (uint16_t input)
2336 store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret),
2337 BFD_ENDIAN_BIG, input);
2341 /* Restore the execution log from a core_bfd file. */
2343 record_full_restore (void)
2346 struct cleanup *old_cleanups;
2347 struct record_full_entry *rec;
2351 struct regcache *regcache;
2353 /* We restore the execution log from the open core bfd,
2355 if (core_bfd == NULL)
2358 /* "record_full_restore" can only be called when record list is empty. */
2359 gdb_assert (record_full_first.next == NULL);
2362 fprintf_unfiltered (gdb_stdlog, "Restoring recording from core file.\n");
2364 /* Now need to find our special note section. */
2365 osec = bfd_get_section_by_name (core_bfd, "null0");
2367 fprintf_unfiltered (gdb_stdlog, "Find precord section %s.\n",
2368 osec ? "succeeded" : "failed");
2371 osec_size = bfd_section_size (core_bfd, osec);
2373 fprintf_unfiltered (gdb_stdlog, "%s", bfd_section_name (core_bfd, osec));
2375 /* Check the magic code. */
2376 bfdcore_read (core_bfd, osec, &magic, sizeof (magic), &bfd_offset);
2377 if (magic != RECORD_FULL_FILE_MAGIC)
2378 error (_("Version mis-match or file format error in core file %s."),
2379 bfd_get_filename (core_bfd));
2381 fprintf_unfiltered (gdb_stdlog,
2382 " Reading 4-byte magic cookie "
2383 "RECORD_FULL_FILE_MAGIC (0x%s)\n",
2384 phex_nz (netorder32 (magic), 4));
2386 /* Restore the entries in recfd into record_full_arch_list_head and
2387 record_full_arch_list_tail. */
2388 record_full_arch_list_head = NULL;
2389 record_full_arch_list_tail = NULL;
2390 record_full_insn_num = 0;
2391 old_cleanups = make_cleanup (record_full_arch_list_cleanups, 0);
2392 regcache = get_current_regcache ();
2397 uint32_t regnum, len, signal, count;
2400 /* We are finished when offset reaches osec_size. */
2401 if (bfd_offset >= osec_size)
2403 bfdcore_read (core_bfd, osec, &rectype, sizeof (rectype), &bfd_offset);
2407 case record_full_reg: /* reg */
2408 /* Get register number to regnum. */
2409 bfdcore_read (core_bfd, osec, ®num,
2410 sizeof (regnum), &bfd_offset);
2411 regnum = netorder32 (regnum);
2413 rec = record_full_reg_alloc (regcache, regnum);
2416 bfdcore_read (core_bfd, osec, record_full_get_loc (rec),
2417 rec->u.reg.len, &bfd_offset);
2420 fprintf_unfiltered (gdb_stdlog,
2421 " Reading register %d (1 "
2422 "plus %lu plus %d bytes)\n",
2424 (unsigned long) sizeof (regnum),
2428 case record_full_mem: /* mem */
2430 bfdcore_read (core_bfd, osec, &len,
2431 sizeof (len), &bfd_offset);
2432 len = netorder32 (len);
2435 bfdcore_read (core_bfd, osec, &addr,
2436 sizeof (addr), &bfd_offset);
2437 addr = netorder64 (addr);
2439 rec = record_full_mem_alloc (addr, len);
2442 bfdcore_read (core_bfd, osec, record_full_get_loc (rec),
2443 rec->u.mem.len, &bfd_offset);
2446 fprintf_unfiltered (gdb_stdlog,
2447 " Reading memory %s (1 plus "
2448 "%lu plus %lu plus %d bytes)\n",
2449 paddress (get_current_arch (),
2451 (unsigned long) sizeof (addr),
2452 (unsigned long) sizeof (len),
2456 case record_full_end: /* end */
2457 rec = record_full_end_alloc ();
2458 record_full_insn_num ++;
2460 /* Get signal value. */
2461 bfdcore_read (core_bfd, osec, &signal,
2462 sizeof (signal), &bfd_offset);
2463 signal = netorder32 (signal);
2464 rec->u.end.sigval = (enum gdb_signal) signal;
2466 /* Get insn count. */
2467 bfdcore_read (core_bfd, osec, &count,
2468 sizeof (count), &bfd_offset);
2469 count = netorder32 (count);
2470 rec->u.end.insn_num = count;
2471 record_full_insn_count = count + 1;
2473 fprintf_unfiltered (gdb_stdlog,
2474 " Reading record_full_end (1 + "
2475 "%lu + %lu bytes), offset == %s\n",
2476 (unsigned long) sizeof (signal),
2477 (unsigned long) sizeof (count),
2478 paddress (get_current_arch (),
2483 error (_("Bad entry type in core file %s."),
2484 bfd_get_filename (core_bfd));
2488 /* Add rec to record arch list. */
2489 record_full_arch_list_add (rec);
2492 discard_cleanups (old_cleanups);
2494 /* Add record_full_arch_list_head to the end of record list. */
2495 record_full_first.next = record_full_arch_list_head;
2496 record_full_arch_list_head->prev = &record_full_first;
2497 record_full_arch_list_tail->next = NULL;
2498 record_full_list = &record_full_first;
2500 /* Update record_full_insn_max_num. */
2501 if (record_full_insn_num > record_full_insn_max_num)
2503 record_full_insn_max_num = record_full_insn_num;
2504 warning (_("Auto increase record/replay buffer limit to %u."),
2505 record_full_insn_max_num);
2509 printf_filtered (_("Restored records from core file %s.\n"),
2510 bfd_get_filename (core_bfd));
2512 print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1);
2515 /* bfdcore_write -- write bytes into a core file section. */
2518 bfdcore_write (bfd *obfd, asection *osec, void *buf, int len, int *offset)
2520 int ret = bfd_set_section_contents (obfd, osec, buf, *offset, len);
2525 error (_("Failed to write %d bytes to core file %s ('%s')."),
2526 len, bfd_get_filename (obfd),
2527 bfd_errmsg (bfd_get_error ()));
2530 /* Restore the execution log from a file. We use a modified elf
2531 corefile format, with an extra section for our data. */
2534 cmd_record_full_restore (char *args, int from_tty)
2536 core_file_command (args, from_tty);
2537 record_full_open (args, from_tty);
2541 record_full_save_cleanups (void *data)
2543 bfd *obfd = (bfd *) data;
2544 char *pathname = xstrdup (bfd_get_filename (obfd));
2546 gdb_bfd_unref (obfd);
2551 /* Save the execution log to a file. We use a modified elf corefile
2552 format, with an extra section for our data. */
2555 record_full_save (struct target_ops *self, const char *recfilename)
2557 struct record_full_entry *cur_record_full_list;
2559 struct regcache *regcache;
2560 struct gdbarch *gdbarch;
2561 struct cleanup *old_cleanups;
2562 struct cleanup *set_cleanups;
2565 asection *osec = NULL;
2568 /* Open the save file. */
2570 fprintf_unfiltered (gdb_stdlog, "Saving execution log to core file '%s'\n",
2573 /* Open the output file. */
2574 obfd = create_gcore_bfd (recfilename);
2575 old_cleanups = make_cleanup (record_full_save_cleanups, obfd);
2577 /* Save the current record entry to "cur_record_full_list". */
2578 cur_record_full_list = record_full_list;
2580 /* Get the values of regcache and gdbarch. */
2581 regcache = get_current_regcache ();
2582 gdbarch = get_regcache_arch (regcache);
2584 /* Disable the GDB operation record. */
2585 set_cleanups = record_full_gdb_operation_disable_set ();
2587 /* Reverse execute to the begin of record list. */
2590 /* Check for beginning and end of log. */
2591 if (record_full_list == &record_full_first)
2594 record_full_exec_insn (regcache, gdbarch, record_full_list);
2596 if (record_full_list->prev)
2597 record_full_list = record_full_list->prev;
2600 /* Compute the size needed for the extra bfd section. */
2601 save_size = 4; /* magic cookie */
2602 for (record_full_list = record_full_first.next; record_full_list;
2603 record_full_list = record_full_list->next)
2604 switch (record_full_list->type)
2606 case record_full_end:
2607 save_size += 1 + 4 + 4;
2609 case record_full_reg:
2610 save_size += 1 + 4 + record_full_list->u.reg.len;
2612 case record_full_mem:
2613 save_size += 1 + 4 + 8 + record_full_list->u.mem.len;
2617 /* Make the new bfd section. */
2618 osec = bfd_make_section_anyway_with_flags (obfd, "precord",
2622 error (_("Failed to create 'precord' section for corefile %s: %s"),
2624 bfd_errmsg (bfd_get_error ()));
2625 bfd_set_section_size (obfd, osec, save_size);
2626 bfd_set_section_vma (obfd, osec, 0);
2627 bfd_set_section_alignment (obfd, osec, 0);
2628 bfd_section_lma (obfd, osec) = 0;
2630 /* Save corefile state. */
2631 write_gcore_file (obfd);
2633 /* Write out the record log. */
2634 /* Write the magic code. */
2635 magic = RECORD_FULL_FILE_MAGIC;
2637 fprintf_unfiltered (gdb_stdlog,
2638 " Writing 4-byte magic cookie "
2639 "RECORD_FULL_FILE_MAGIC (0x%s)\n",
2640 phex_nz (magic, 4));
2641 bfdcore_write (obfd, osec, &magic, sizeof (magic), &bfd_offset);
2643 /* Save the entries to recfd and forward execute to the end of
2645 record_full_list = &record_full_first;
2649 if (record_full_list != &record_full_first)
2652 uint32_t regnum, len, signal, count;
2655 type = record_full_list->type;
2656 bfdcore_write (obfd, osec, &type, sizeof (type), &bfd_offset);
2658 switch (record_full_list->type)
2660 case record_full_reg: /* reg */
2662 fprintf_unfiltered (gdb_stdlog,
2663 " Writing register %d (1 "
2664 "plus %lu plus %d bytes)\n",
2665 record_full_list->u.reg.num,
2666 (unsigned long) sizeof (regnum),
2667 record_full_list->u.reg.len);
2670 regnum = netorder32 (record_full_list->u.reg.num);
2671 bfdcore_write (obfd, osec, ®num,
2672 sizeof (regnum), &bfd_offset);
2675 bfdcore_write (obfd, osec,
2676 record_full_get_loc (record_full_list),
2677 record_full_list->u.reg.len, &bfd_offset);
2680 case record_full_mem: /* mem */
2682 fprintf_unfiltered (gdb_stdlog,
2683 " Writing memory %s (1 plus "
2684 "%lu plus %lu plus %d bytes)\n",
2686 record_full_list->u.mem.addr),
2687 (unsigned long) sizeof (addr),
2688 (unsigned long) sizeof (len),
2689 record_full_list->u.mem.len);
2692 len = netorder32 (record_full_list->u.mem.len);
2693 bfdcore_write (obfd, osec, &len, sizeof (len), &bfd_offset);
2695 /* Write memaddr. */
2696 addr = netorder64 (record_full_list->u.mem.addr);
2697 bfdcore_write (obfd, osec, &addr,
2698 sizeof (addr), &bfd_offset);
2701 bfdcore_write (obfd, osec,
2702 record_full_get_loc (record_full_list),
2703 record_full_list->u.mem.len, &bfd_offset);
2706 case record_full_end:
2708 fprintf_unfiltered (gdb_stdlog,
2709 " Writing record_full_end (1 + "
2710 "%lu + %lu bytes)\n",
2711 (unsigned long) sizeof (signal),
2712 (unsigned long) sizeof (count));
2713 /* Write signal value. */
2714 signal = netorder32 (record_full_list->u.end.sigval);
2715 bfdcore_write (obfd, osec, &signal,
2716 sizeof (signal), &bfd_offset);
2718 /* Write insn count. */
2719 count = netorder32 (record_full_list->u.end.insn_num);
2720 bfdcore_write (obfd, osec, &count,
2721 sizeof (count), &bfd_offset);
2726 /* Execute entry. */
2727 record_full_exec_insn (regcache, gdbarch, record_full_list);
2729 if (record_full_list->next)
2730 record_full_list = record_full_list->next;
2735 /* Reverse execute to cur_record_full_list. */
2738 /* Check for beginning and end of log. */
2739 if (record_full_list == cur_record_full_list)
2742 record_full_exec_insn (regcache, gdbarch, record_full_list);
2744 if (record_full_list->prev)
2745 record_full_list = record_full_list->prev;
2748 do_cleanups (set_cleanups);
2749 gdb_bfd_unref (obfd);
2750 discard_cleanups (old_cleanups);
2753 printf_filtered (_("Saved core file %s with execution log.\n"),
2757 /* record_full_goto_insn -- rewind the record log (forward or backward,
2758 depending on DIR) to the given entry, changing the program state
2762 record_full_goto_insn (struct record_full_entry *entry,
2763 enum exec_direction_kind dir)
2765 struct cleanup *set_cleanups = record_full_gdb_operation_disable_set ();
2766 struct regcache *regcache = get_current_regcache ();
2767 struct gdbarch *gdbarch = get_regcache_arch (regcache);
2769 /* Assume everything is valid: we will hit the entry,
2770 and we will not hit the end of the recording. */
2772 if (dir == EXEC_FORWARD)
2773 record_full_list = record_full_list->next;
2777 record_full_exec_insn (regcache, gdbarch, record_full_list);
2778 if (dir == EXEC_REVERSE)
2779 record_full_list = record_full_list->prev;
2781 record_full_list = record_full_list->next;
2782 } while (record_full_list != entry);
2783 do_cleanups (set_cleanups);
2786 /* Alias for "target record-full". */
2789 cmd_record_full_start (char *args, int from_tty)
2791 execute_command ("target record-full", from_tty);
2795 set_record_full_insn_max_num (char *args, int from_tty,
2796 struct cmd_list_element *c)
2798 if (record_full_insn_num > record_full_insn_max_num)
2800 /* Count down record_full_insn_num while releasing records from list. */
2801 while (record_full_insn_num > record_full_insn_max_num)
2803 record_full_list_release_first ();
2804 record_full_insn_num--;
2809 /* The "set record full" command. */
2812 set_record_full_command (char *args, int from_tty)
2814 printf_unfiltered (_("\"set record full\" must be followed "
2815 "by an apporpriate subcommand.\n"));
2816 help_list (set_record_full_cmdlist, "set record full ", all_commands,
2820 /* The "show record full" command. */
2823 show_record_full_command (char *args, int from_tty)
2825 cmd_show_list (show_record_full_cmdlist, from_tty, "");
2828 /* Provide a prototype to silence -Wmissing-prototypes. */
2829 extern initialize_file_ftype _initialize_record_full;
2832 _initialize_record_full (void)
2834 struct cmd_list_element *c;
2836 /* Init record_full_first. */
2837 record_full_first.prev = NULL;
2838 record_full_first.next = NULL;
2839 record_full_first.type = record_full_end;
2841 init_record_full_ops ();
2842 add_target (&record_full_ops);
2843 add_deprecated_target_alias (&record_full_ops, "record");
2844 init_record_full_core_ops ();
2845 add_target (&record_full_core_ops);
2847 add_prefix_cmd ("full", class_obscure, cmd_record_full_start,
2848 _("Start full execution recording."), &record_full_cmdlist,
2849 "record full ", 0, &record_cmdlist);
2851 c = add_cmd ("restore", class_obscure, cmd_record_full_restore,
2852 _("Restore the execution log from a file.\n\
2853 Argument is filename. File must be created with 'record save'."),
2854 &record_full_cmdlist);
2855 set_cmd_completer (c, filename_completer);
2857 /* Deprecate the old version without "full" prefix. */
2858 c = add_alias_cmd ("restore", "full restore", class_obscure, 1,
2860 set_cmd_completer (c, filename_completer);
2861 deprecate_cmd (c, "record full restore");
2863 add_prefix_cmd ("full", class_support, set_record_full_command,
2864 _("Set record options"), &set_record_full_cmdlist,
2865 "set record full ", 0, &set_record_cmdlist);
2867 add_prefix_cmd ("full", class_support, show_record_full_command,
2868 _("Show record options"), &show_record_full_cmdlist,
2869 "show record full ", 0, &show_record_cmdlist);
2871 /* Record instructions number limit command. */
2872 add_setshow_boolean_cmd ("stop-at-limit", no_class,
2873 &record_full_stop_at_limit, _("\
2874 Set whether record/replay stops when record/replay buffer becomes full."), _("\
2875 Show whether record/replay stops when record/replay buffer becomes full."),
2876 _("Default is ON.\n\
2877 When ON, if the record/replay buffer becomes full, ask user what to do.\n\
2878 When OFF, if the record/replay buffer becomes full,\n\
2879 delete the oldest recorded instruction to make room for each new one."),
2881 &set_record_full_cmdlist, &show_record_full_cmdlist);
2883 c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1,
2884 &set_record_cmdlist);
2885 deprecate_cmd (c, "set record full stop-at-limit");
2887 c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1,
2888 &show_record_cmdlist);
2889 deprecate_cmd (c, "show record full stop-at-limit");
2891 add_setshow_uinteger_cmd ("insn-number-max", no_class,
2892 &record_full_insn_max_num,
2893 _("Set record/replay buffer limit."),
2894 _("Show record/replay buffer limit."), _("\
2895 Set the maximum number of instructions to be stored in the\n\
2896 record/replay buffer. A value of either \"unlimited\" or zero means no\n\
2897 limit. Default is 200000."),
2898 set_record_full_insn_max_num,
2899 NULL, &set_record_full_cmdlist,
2900 &show_record_full_cmdlist);
2902 c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1,
2903 &set_record_cmdlist);
2904 deprecate_cmd (c, "set record full insn-number-max");
2906 c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1,
2907 &show_record_cmdlist);
2908 deprecate_cmd (c, "show record full insn-number-max");
2910 add_setshow_boolean_cmd ("memory-query", no_class,
2911 &record_full_memory_query, _("\
2912 Set whether query if PREC cannot record memory change of next instruction."),
2914 Show whether query if PREC cannot record memory change of next instruction."),
2917 When ON, query if PREC cannot record memory change of next instruction."),
2919 &set_record_full_cmdlist,
2920 &show_record_full_cmdlist);
2922 c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1,
2923 &set_record_cmdlist);
2924 deprecate_cmd (c, "set record full memory-query");
2926 c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1,
2927 &show_record_cmdlist);
2928 deprecate_cmd (c, "show record full memory-query");