1 /* Process record and replay target for GDB, the GNU debugger.
3 Copyright (C) 2013-2014 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 "exceptions.h"
26 #include "completer.h"
27 #include "arch-utils.h"
31 #include "record-full.h"
34 #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 = xcalloc (1, sizeof (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 = xcalloc (1, sizeof (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 = xcalloc (1, sizeof (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 (int set_terminal)
540 if (record_full_insn_num == record_full_insn_max_num)
542 /* Ask user what to do. */
543 if (record_full_stop_at_limit)
548 target_terminal_ours ();
549 q = yquery (_("Do you want to auto delete previous execution "
550 "log entries when record/replay buffer becomes "
551 "full (record full stop-at-limit)?"));
553 target_terminal_inferior ();
555 record_full_stop_at_limit = 0;
557 error (_("Process record: stopped by user."));
563 record_full_arch_list_cleanups (void *ignore)
565 record_full_list_release (record_full_arch_list_tail);
568 /* Before inferior step (when GDB record the running message, inferior
569 only can step), GDB will call this function to record the values to
570 record_full_list. This function will call gdbarch_process_record to
571 record the running message of inferior and set them to
572 record_full_arch_list, and add it to record_full_list. */
575 record_full_message (struct regcache *regcache, enum gdb_signal signal)
578 struct gdbarch *gdbarch = get_regcache_arch (regcache);
579 struct cleanup *old_cleanups
580 = make_cleanup (record_full_arch_list_cleanups, 0);
582 record_full_arch_list_head = NULL;
583 record_full_arch_list_tail = NULL;
585 /* Check record_full_insn_num. */
586 record_full_check_insn_num (1);
588 /* If gdb sends a signal value to target_resume,
589 save it in the 'end' field of the previous instruction.
591 Maybe process record should record what really happened,
592 rather than what gdb pretends has happened.
594 So if Linux delivered the signal to the child process during
595 the record mode, we will record it and deliver it again in
598 If user says "ignore this signal" during the record mode, then
599 it will be ignored again during the replay mode (no matter if
600 the user says something different, like "deliver this signal"
601 during the replay mode).
603 User should understand that nothing he does during the replay
604 mode will change the behavior of the child. If he tries,
605 then that is a user error.
607 But we should still deliver the signal to gdb during the replay,
608 if we delivered it during the recording. Therefore we should
609 record the signal during record_full_wait, not
610 record_full_resume. */
611 if (record_full_list != &record_full_first) /* FIXME better way to check */
613 gdb_assert (record_full_list->type == record_full_end);
614 record_full_list->u.end.sigval = signal;
617 if (signal == GDB_SIGNAL_0
618 || !gdbarch_process_record_signal_p (gdbarch))
619 ret = gdbarch_process_record (gdbarch,
621 regcache_read_pc (regcache));
623 ret = gdbarch_process_record_signal (gdbarch,
628 error (_("Process record: inferior program stopped."));
630 error (_("Process record: failed to record execution log."));
632 discard_cleanups (old_cleanups);
634 record_full_list->next = record_full_arch_list_head;
635 record_full_arch_list_head->prev = record_full_list;
636 record_full_list = record_full_arch_list_tail;
638 if (record_full_insn_num == record_full_insn_max_num)
639 record_full_list_release_first ();
641 record_full_insn_num++;
646 struct record_full_message_args {
647 struct regcache *regcache;
648 enum gdb_signal signal;
652 record_full_message_wrapper (void *args)
654 struct record_full_message_args *record_full_args = args;
656 return record_full_message (record_full_args->regcache,
657 record_full_args->signal);
661 record_full_message_wrapper_safe (struct regcache *regcache,
662 enum gdb_signal signal)
664 struct record_full_message_args args;
666 args.regcache = regcache;
667 args.signal = signal;
669 return catch_errors (record_full_message_wrapper, &args, NULL,
673 /* Set to 1 if record_full_store_registers and record_full_xfer_partial
674 doesn't need record. */
676 static int record_full_gdb_operation_disable = 0;
679 record_full_gdb_operation_disable_set (void)
681 struct cleanup *old_cleanups = NULL;
684 make_cleanup_restore_integer (&record_full_gdb_operation_disable);
685 record_full_gdb_operation_disable = 1;
690 /* Flag set to TRUE for target_stopped_by_watchpoint. */
691 static int record_full_hw_watchpoint = 0;
693 /* Execute one instruction from the record log. Each instruction in
694 the log will be represented by an arbitrary sequence of register
695 entries and memory entries, followed by an 'end' entry. */
698 record_full_exec_insn (struct regcache *regcache,
699 struct gdbarch *gdbarch,
700 struct record_full_entry *entry)
704 case record_full_reg: /* reg */
706 gdb_byte reg[MAX_REGISTER_SIZE];
708 if (record_debug > 1)
709 fprintf_unfiltered (gdb_stdlog,
710 "Process record: record_full_reg %s to "
711 "inferior num = %d.\n",
712 host_address_to_string (entry),
715 regcache_cooked_read (regcache, entry->u.reg.num, reg);
716 regcache_cooked_write (regcache, entry->u.reg.num,
717 record_full_get_loc (entry));
718 memcpy (record_full_get_loc (entry), reg, entry->u.reg.len);
722 case record_full_mem: /* mem */
724 /* Nothing to do if the entry is flagged not_accessible. */
725 if (!entry->u.mem.mem_entry_not_accessible)
727 gdb_byte *mem = alloca (entry->u.mem.len);
729 if (record_debug > 1)
730 fprintf_unfiltered (gdb_stdlog,
731 "Process record: record_full_mem %s to "
732 "inferior addr = %s len = %d.\n",
733 host_address_to_string (entry),
734 paddress (gdbarch, entry->u.mem.addr),
737 if (record_read_memory (gdbarch,
738 entry->u.mem.addr, mem, entry->u.mem.len))
739 entry->u.mem.mem_entry_not_accessible = 1;
742 if (target_write_memory (entry->u.mem.addr,
743 record_full_get_loc (entry),
746 entry->u.mem.mem_entry_not_accessible = 1;
748 warning (_("Process record: error writing memory at "
749 "addr = %s len = %d."),
750 paddress (gdbarch, entry->u.mem.addr),
755 memcpy (record_full_get_loc (entry), mem,
758 /* We've changed memory --- check if a hardware
759 watchpoint should trap. Note that this
760 presently assumes the target beneath supports
761 continuable watchpoints. On non-continuable
762 watchpoints target, we'll want to check this
763 _before_ actually doing the memory change, and
764 not doing the change at all if the watchpoint
766 if (hardware_watchpoint_inserted_in_range
767 (get_regcache_aspace (regcache),
768 entry->u.mem.addr, entry->u.mem.len))
769 record_full_hw_watchpoint = 1;
778 static void record_full_restore (void);
780 /* Asynchronous signal handle registered as event loop source for when
781 we have pending events ready to be passed to the core. */
783 static struct async_event_handler *record_full_async_inferior_event_token;
786 record_full_async_inferior_event_handler (gdb_client_data data)
788 inferior_event_handler (INF_REG_EVENT, NULL);
791 /* Open the process record target. */
794 record_full_core_open_1 (char *name, int from_tty)
796 struct regcache *regcache = get_current_regcache ();
797 int regnum = gdbarch_num_regs (get_regcache_arch (regcache));
800 /* Get record_full_core_regbuf. */
801 target_fetch_registers (regcache, -1);
802 record_full_core_regbuf = xmalloc (MAX_REGISTER_SIZE * regnum);
803 for (i = 0; i < regnum; i ++)
804 regcache_raw_collect (regcache, i,
805 record_full_core_regbuf + MAX_REGISTER_SIZE * i);
807 /* Get record_full_core_start and record_full_core_end. */
808 if (build_section_table (core_bfd, &record_full_core_start,
809 &record_full_core_end))
811 xfree (record_full_core_regbuf);
812 record_full_core_regbuf = NULL;
813 error (_("\"%s\": Can't find sections: %s"),
814 bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ()));
817 push_target (&record_full_core_ops);
818 record_full_restore ();
821 /* "to_open" target method for 'live' processes. */
824 record_full_open_1 (char *name, int from_tty)
827 fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open\n");
830 if (!target_has_execution)
831 error (_("Process record: the program is not being run."));
833 error (_("Process record target can't debug inferior in non-stop mode "
836 if (!gdbarch_process_record_p (target_gdbarch ()))
837 error (_("Process record: the current architecture doesn't support "
838 "record function."));
840 push_target (&record_full_ops);
843 static void record_full_init_record_breakpoints (void);
845 /* "to_open" target method. Open the process record target. */
848 record_full_open (char *name, int from_tty)
850 struct target_ops *t;
853 fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open\n");
858 record_full_insn_num = 0;
859 record_full_insn_count = 0;
860 record_full_list = &record_full_first;
861 record_full_list->next = NULL;
864 record_full_core_open_1 (name, from_tty);
866 record_full_open_1 (name, from_tty);
868 /* Register extra event sources in the event loop. */
869 record_full_async_inferior_event_token
870 = create_async_event_handler (record_full_async_inferior_event_handler,
873 record_full_init_record_breakpoints ();
875 observer_notify_record_changed (current_inferior (), 1);
878 /* "to_close" target method. Close the process record target. */
881 record_full_close (struct target_ops *self)
883 struct record_full_core_buf_entry *entry;
886 fprintf_unfiltered (gdb_stdlog, "Process record: record_full_close\n");
888 record_full_list_release (record_full_list);
890 /* Release record_full_core_regbuf. */
891 if (record_full_core_regbuf)
893 xfree (record_full_core_regbuf);
894 record_full_core_regbuf = NULL;
897 /* Release record_full_core_buf_list. */
898 if (record_full_core_buf_list)
900 for (entry = record_full_core_buf_list->prev; entry;
903 xfree (record_full_core_buf_list);
904 record_full_core_buf_list = entry;
906 record_full_core_buf_list = NULL;
909 if (record_full_async_inferior_event_token)
910 delete_async_event_handler (&record_full_async_inferior_event_token);
913 static int record_full_resume_step = 0;
915 /* True if we've been resumed, and so each record_full_wait call should
916 advance execution. If this is false, record_full_wait will return a
917 TARGET_WAITKIND_IGNORE. */
918 static int record_full_resumed = 0;
920 /* The execution direction of the last resume we got. This is
921 necessary for async mode. Vis (order is not strictly accurate):
923 1. user has the global execution direction set to forward
924 2. user does a reverse-step command
925 3. record_full_resume is called with global execution direction
926 temporarily switched to reverse
927 4. GDB's execution direction is reverted back to forward
928 5. target record notifies event loop there's an event to handle
929 6. infrun asks the target which direction was it going, and switches
930 the global execution direction accordingly (to reverse)
931 7. infrun polls an event out of the record target, and handles it
932 8. GDB goes back to the event loop, and goto #4.
934 static enum exec_direction_kind record_full_execution_dir = EXEC_FORWARD;
936 /* "to_resume" target method. Resume the process record target. */
939 record_full_resume (struct target_ops *ops, ptid_t ptid, int step,
940 enum gdb_signal signal)
942 record_full_resume_step = step;
943 record_full_resumed = 1;
944 record_full_execution_dir = execution_direction;
946 if (!RECORD_FULL_IS_REPLAY)
948 struct gdbarch *gdbarch = target_thread_architecture (ptid);
950 record_full_message (get_current_regcache (), signal);
954 /* This is not hard single step. */
955 if (!gdbarch_software_single_step_p (gdbarch))
957 /* This is a normal continue. */
962 /* This arch support soft sigle step. */
963 if (single_step_breakpoints_inserted ())
965 /* This is a soft single step. */
966 record_full_resume_step = 1;
970 /* This is a continue.
971 Try to insert a soft single step breakpoint. */
972 if (!gdbarch_software_single_step (gdbarch,
973 get_current_frame ()))
975 /* This system don't want use soft single step.
976 Use hard sigle step. */
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 ())
993 target_async (inferior_event_handler, 0);
994 /* Notify the event loop there's an event to wait for. We do
995 most of the work in record_full_wait. */
996 mark_async_event_handler (record_full_async_inferior_event_token);
1000 static int record_full_get_sig = 0;
1002 /* SIGINT signal handler, registered by "to_wait" method. */
1005 record_full_sig_handler (int signo)
1008 fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\n");
1010 /* It will break the running inferior in replay mode. */
1011 record_full_resume_step = 1;
1013 /* It will let record_full_wait set inferior status to get the signal
1015 record_full_get_sig = 1;
1019 record_full_wait_cleanups (void *ignore)
1021 if (execution_direction == EXEC_REVERSE)
1023 if (record_full_list->next)
1024 record_full_list = record_full_list->next;
1027 record_full_list = record_full_list->prev;
1030 /* "to_wait" target method for process record target.
1032 In record mode, the target is always run in singlestep mode
1033 (even when gdb says to continue). The to_wait method intercepts
1034 the stop events and determines which ones are to be passed on to
1035 gdb. Most stop events are just singlestep events that gdb is not
1036 to know about, so the to_wait method just records them and keeps
1039 In replay mode, this function emulates the recorded execution log,
1040 one instruction at a time (forward or backward), and determines
1044 record_full_wait_1 (struct target_ops *ops,
1045 ptid_t ptid, struct target_waitstatus *status,
1048 struct cleanup *set_cleanups = record_full_gdb_operation_disable_set ();
1051 fprintf_unfiltered (gdb_stdlog,
1052 "Process record: record_full_wait "
1053 "record_full_resume_step = %d, "
1054 "record_full_resumed = %d, direction=%s\n",
1055 record_full_resume_step, record_full_resumed,
1056 record_full_execution_dir == EXEC_FORWARD
1057 ? "forward" : "reverse");
1059 if (!record_full_resumed)
1061 gdb_assert ((options & TARGET_WNOHANG) != 0);
1063 /* No interesting event. */
1064 status->kind = TARGET_WAITKIND_IGNORE;
1065 return minus_one_ptid;
1068 record_full_get_sig = 0;
1069 signal (SIGINT, record_full_sig_handler);
1071 if (!RECORD_FULL_IS_REPLAY && ops != &record_full_core_ops)
1073 if (record_full_resume_step)
1075 /* This is a single step. */
1076 return ops->beneath->to_wait (ops->beneath, ptid, status, options);
1080 /* This is not a single step. */
1083 struct gdbarch *gdbarch = target_thread_architecture (inferior_ptid);
1087 ret = ops->beneath->to_wait (ops->beneath, ptid, status, options);
1088 if (status->kind == TARGET_WAITKIND_IGNORE)
1091 fprintf_unfiltered (gdb_stdlog,
1092 "Process record: record_full_wait "
1093 "target beneath not done yet\n");
1097 if (single_step_breakpoints_inserted ())
1098 remove_single_step_breakpoints ();
1100 if (record_full_resume_step)
1103 /* Is this a SIGTRAP? */
1104 if (status->kind == TARGET_WAITKIND_STOPPED
1105 && status->value.sig == GDB_SIGNAL_TRAP)
1107 struct regcache *regcache;
1108 struct address_space *aspace;
1110 /* Yes -- this is likely our single-step finishing,
1111 but check if there's any reason the core would be
1112 interested in the event. */
1114 registers_changed ();
1115 regcache = get_current_regcache ();
1116 tmp_pc = regcache_read_pc (regcache);
1117 aspace = get_regcache_aspace (regcache);
1119 if (target_stopped_by_watchpoint ())
1121 /* Always interested in watchpoints. */
1123 else if (breakpoint_inserted_here_p (aspace, tmp_pc))
1125 /* There is a breakpoint here. Let the core
1127 if (software_breakpoint_inserted_here_p (aspace, tmp_pc))
1129 struct gdbarch *gdbarch
1130 = get_regcache_arch (regcache);
1131 CORE_ADDR decr_pc_after_break
1132 = target_decr_pc_after_break (gdbarch);
1133 if (decr_pc_after_break)
1134 regcache_write_pc (regcache,
1135 tmp_pc + decr_pc_after_break);
1140 /* This is a single-step trap. Record the
1141 insn and issue another step.
1142 FIXME: this part can be a random SIGTRAP too.
1143 But GDB cannot handle it. */
1146 if (!record_full_message_wrapper_safe (regcache,
1149 status->kind = TARGET_WAITKIND_STOPPED;
1150 status->value.sig = GDB_SIGNAL_0;
1154 if (gdbarch_software_single_step_p (gdbarch))
1156 /* Try to insert the software single step breakpoint.
1157 If insert success, set step to 0. */
1158 set_executing (inferior_ptid, 0);
1159 reinit_frame_cache ();
1160 if (gdbarch_software_single_step (gdbarch,
1161 get_current_frame ()))
1163 set_executing (inferior_ptid, 1);
1167 fprintf_unfiltered (gdb_stdlog,
1168 "Process record: record_full_wait "
1169 "issuing one more step in the "
1170 "target beneath\n");
1171 ops->beneath->to_resume (ops->beneath, ptid, step,
1177 /* The inferior is broken by a breakpoint or a signal. */
1186 struct regcache *regcache = get_current_regcache ();
1187 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1188 struct address_space *aspace = get_regcache_aspace (regcache);
1189 int continue_flag = 1;
1190 int first_record_full_end = 1;
1191 struct cleanup *old_cleanups
1192 = make_cleanup (record_full_wait_cleanups, 0);
1195 record_full_hw_watchpoint = 0;
1196 status->kind = TARGET_WAITKIND_STOPPED;
1198 /* Check breakpoint when forward execute. */
1199 if (execution_direction == EXEC_FORWARD)
1201 tmp_pc = regcache_read_pc (regcache);
1202 if (breakpoint_inserted_here_p (aspace, tmp_pc))
1204 int decr_pc_after_break = target_decr_pc_after_break (gdbarch);
1207 fprintf_unfiltered (gdb_stdlog,
1208 "Process record: break at %s.\n",
1209 paddress (gdbarch, tmp_pc));
1211 if (decr_pc_after_break
1212 && !record_full_resume_step
1213 && software_breakpoint_inserted_here_p (aspace, tmp_pc))
1214 regcache_write_pc (regcache,
1215 tmp_pc + decr_pc_after_break);
1220 /* If GDB is in terminal_inferior mode, it will not get the signal.
1221 And in GDB replay mode, GDB doesn't need to be in terminal_inferior
1222 mode, because inferior will not executed.
1223 Then set it to terminal_ours to make GDB get the signal. */
1224 target_terminal_ours ();
1226 /* In EXEC_FORWARD mode, record_full_list points to the tail of prev
1228 if (execution_direction == EXEC_FORWARD && record_full_list->next)
1229 record_full_list = record_full_list->next;
1231 /* Loop over the record_full_list, looking for the next place to
1235 /* Check for beginning and end of log. */
1236 if (execution_direction == EXEC_REVERSE
1237 && record_full_list == &record_full_first)
1239 /* Hit beginning of record log in reverse. */
1240 status->kind = TARGET_WAITKIND_NO_HISTORY;
1243 if (execution_direction != EXEC_REVERSE && !record_full_list->next)
1245 /* Hit end of record log going forward. */
1246 status->kind = TARGET_WAITKIND_NO_HISTORY;
1250 record_full_exec_insn (regcache, gdbarch, record_full_list);
1252 if (record_full_list->type == record_full_end)
1254 if (record_debug > 1)
1255 fprintf_unfiltered (gdb_stdlog,
1256 "Process record: record_full_end %s to "
1258 host_address_to_string (record_full_list));
1260 if (first_record_full_end && execution_direction == EXEC_REVERSE)
1262 /* When reverse excute, the first record_full_end is the
1263 part of current instruction. */
1264 first_record_full_end = 0;
1268 /* In EXEC_REVERSE mode, this is the record_full_end of prev
1270 In EXEC_FORWARD mode, this is the record_full_end of
1271 current instruction. */
1273 if (record_full_resume_step)
1275 if (record_debug > 1)
1276 fprintf_unfiltered (gdb_stdlog,
1277 "Process record: step.\n");
1281 /* check breakpoint */
1282 tmp_pc = regcache_read_pc (regcache);
1283 if (breakpoint_inserted_here_p (aspace, tmp_pc))
1285 int decr_pc_after_break
1286 = target_decr_pc_after_break (gdbarch);
1289 fprintf_unfiltered (gdb_stdlog,
1290 "Process record: break "
1292 paddress (gdbarch, tmp_pc));
1293 if (decr_pc_after_break
1294 && execution_direction == EXEC_FORWARD
1295 && !record_full_resume_step
1296 && software_breakpoint_inserted_here_p (aspace,
1298 regcache_write_pc (regcache,
1299 tmp_pc + decr_pc_after_break);
1303 if (record_full_hw_watchpoint)
1306 fprintf_unfiltered (gdb_stdlog,
1307 "Process record: hit hw "
1311 /* Check target signal */
1312 if (record_full_list->u.end.sigval != GDB_SIGNAL_0)
1313 /* FIXME: better way to check */
1320 if (execution_direction == EXEC_REVERSE)
1322 if (record_full_list->prev)
1323 record_full_list = record_full_list->prev;
1327 if (record_full_list->next)
1328 record_full_list = record_full_list->next;
1332 while (continue_flag);
1335 if (record_full_get_sig)
1336 status->value.sig = GDB_SIGNAL_INT;
1337 else if (record_full_list->u.end.sigval != GDB_SIGNAL_0)
1338 /* FIXME: better way to check */
1339 status->value.sig = record_full_list->u.end.sigval;
1341 status->value.sig = GDB_SIGNAL_TRAP;
1343 discard_cleanups (old_cleanups);
1346 signal (SIGINT, handle_sigint);
1348 do_cleanups (set_cleanups);
1349 return inferior_ptid;
1353 record_full_wait (struct target_ops *ops,
1354 ptid_t ptid, struct target_waitstatus *status,
1359 return_ptid = record_full_wait_1 (ops, ptid, status, options);
1360 if (status->kind != TARGET_WAITKIND_IGNORE)
1362 /* We're reporting a stop. Make sure any spurious
1363 target_wait(WNOHANG) doesn't advance the target until the
1364 core wants us resumed again. */
1365 record_full_resumed = 0;
1371 record_full_stopped_by_watchpoint (struct target_ops *ops)
1373 if (RECORD_FULL_IS_REPLAY)
1374 return record_full_hw_watchpoint;
1376 return ops->beneath->to_stopped_by_watchpoint (ops->beneath);
1380 record_full_stopped_data_address (struct target_ops *ops, CORE_ADDR *addr_p)
1382 if (RECORD_FULL_IS_REPLAY)
1385 return ops->beneath->to_stopped_data_address (ops->beneath, addr_p);
1388 /* Record registers change (by user or by GDB) to list as an instruction. */
1391 record_full_registers_change (struct regcache *regcache, int regnum)
1393 /* Check record_full_insn_num. */
1394 record_full_check_insn_num (0);
1396 record_full_arch_list_head = NULL;
1397 record_full_arch_list_tail = NULL;
1403 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
1405 if (record_full_arch_list_add_reg (regcache, i))
1407 record_full_list_release (record_full_arch_list_tail);
1408 error (_("Process record: failed to record execution log."));
1414 if (record_full_arch_list_add_reg (regcache, regnum))
1416 record_full_list_release (record_full_arch_list_tail);
1417 error (_("Process record: failed to record execution log."));
1420 if (record_full_arch_list_add_end ())
1422 record_full_list_release (record_full_arch_list_tail);
1423 error (_("Process record: failed to record execution log."));
1425 record_full_list->next = record_full_arch_list_head;
1426 record_full_arch_list_head->prev = record_full_list;
1427 record_full_list = record_full_arch_list_tail;
1429 if (record_full_insn_num == record_full_insn_max_num)
1430 record_full_list_release_first ();
1432 record_full_insn_num++;
1435 /* "to_store_registers" method for process record target. */
1438 record_full_store_registers (struct target_ops *ops,
1439 struct regcache *regcache,
1442 if (!record_full_gdb_operation_disable)
1444 if (RECORD_FULL_IS_REPLAY)
1448 /* Let user choose if he wants to write register or not. */
1451 query (_("Because GDB is in replay mode, changing the "
1452 "value of a register will make the execution "
1453 "log unusable from this point onward. "
1454 "Change all registers?"));
1457 query (_("Because GDB is in replay mode, changing the value "
1458 "of a register will make the execution log unusable "
1459 "from this point onward. Change register %s?"),
1460 gdbarch_register_name (get_regcache_arch (regcache),
1465 /* Invalidate the value of regcache that was set in function
1466 "regcache_raw_write". */
1472 i < gdbarch_num_regs (get_regcache_arch (regcache));
1474 regcache_invalidate (regcache, i);
1477 regcache_invalidate (regcache, regno);
1479 error (_("Process record canceled the operation."));
1482 /* Destroy the record from here forward. */
1483 record_full_list_release_following (record_full_list);
1486 record_full_registers_change (regcache, regno);
1488 ops->beneath->to_store_registers (ops->beneath, regcache, regno);
1491 /* "to_xfer_partial" method. Behavior is conditional on
1492 RECORD_FULL_IS_REPLAY.
1493 In replay mode, we cannot write memory unles we are willing to
1494 invalidate the record/replay log from this point forward. */
1496 static enum target_xfer_status
1497 record_full_xfer_partial (struct target_ops *ops, enum target_object object,
1498 const char *annex, gdb_byte *readbuf,
1499 const gdb_byte *writebuf, ULONGEST offset,
1500 ULONGEST len, ULONGEST *xfered_len)
1502 if (!record_full_gdb_operation_disable
1503 && (object == TARGET_OBJECT_MEMORY
1504 || object == TARGET_OBJECT_RAW_MEMORY) && writebuf)
1506 if (RECORD_FULL_IS_REPLAY)
1508 /* Let user choose if he wants to write memory or not. */
1509 if (!query (_("Because GDB is in replay mode, writing to memory "
1510 "will make the execution log unusable from this "
1511 "point onward. Write memory at address %s?"),
1512 paddress (target_gdbarch (), offset)))
1513 error (_("Process record canceled the operation."));
1515 /* Destroy the record from here forward. */
1516 record_full_list_release_following (record_full_list);
1519 /* Check record_full_insn_num */
1520 record_full_check_insn_num (0);
1522 /* Record registers change to list as an instruction. */
1523 record_full_arch_list_head = NULL;
1524 record_full_arch_list_tail = NULL;
1525 if (record_full_arch_list_add_mem (offset, len))
1527 record_full_list_release (record_full_arch_list_tail);
1529 fprintf_unfiltered (gdb_stdlog,
1530 "Process record: failed to record "
1532 return TARGET_XFER_E_IO;
1534 if (record_full_arch_list_add_end ())
1536 record_full_list_release (record_full_arch_list_tail);
1538 fprintf_unfiltered (gdb_stdlog,
1539 "Process record: failed to record "
1541 return TARGET_XFER_E_IO;
1543 record_full_list->next = record_full_arch_list_head;
1544 record_full_arch_list_head->prev = record_full_list;
1545 record_full_list = record_full_arch_list_tail;
1547 if (record_full_insn_num == record_full_insn_max_num)
1548 record_full_list_release_first ();
1550 record_full_insn_num++;
1553 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1554 readbuf, writebuf, offset,
1558 /* This structure represents a breakpoint inserted while the record
1559 target is active. We use this to know when to install/remove
1560 breakpoints in/from the target beneath. For example, a breakpoint
1561 may be inserted while recording, but removed when not replaying nor
1562 recording. In that case, the breakpoint had not been inserted on
1563 the target beneath, so we should not try to remove it there. */
1565 struct record_full_breakpoint
1567 /* The address and address space the breakpoint was set at. */
1568 struct address_space *address_space;
1571 /* True when the breakpoint has been also installed in the target
1572 beneath. This will be false for breakpoints set during replay or
1574 int in_target_beneath;
1577 typedef struct record_full_breakpoint *record_full_breakpoint_p;
1578 DEF_VEC_P(record_full_breakpoint_p);
1580 /* The list of breakpoints inserted while the record target is
1582 VEC(record_full_breakpoint_p) *record_full_breakpoints = NULL;
1585 record_full_sync_record_breakpoints (struct bp_location *loc, void *data)
1587 if (loc->loc_type != bp_loc_software_breakpoint)
1592 struct record_full_breakpoint *bp = XNEW (struct record_full_breakpoint);
1594 bp->addr = loc->target_info.placed_address;
1595 bp->address_space = loc->target_info.placed_address_space;
1597 bp->in_target_beneath = 1;
1599 VEC_safe_push (record_full_breakpoint_p, record_full_breakpoints, bp);
1603 /* Sync existing breakpoints to record_full_breakpoints. */
1606 record_full_init_record_breakpoints (void)
1608 VEC_free (record_full_breakpoint_p, record_full_breakpoints);
1610 iterate_over_bp_locations (record_full_sync_record_breakpoints);
1613 /* Behavior is conditional on RECORD_FULL_IS_REPLAY. We will not actually
1614 insert or remove breakpoints in the real target when replaying, nor
1618 record_full_insert_breakpoint (struct target_ops *ops,
1619 struct gdbarch *gdbarch,
1620 struct bp_target_info *bp_tgt)
1622 struct record_full_breakpoint *bp;
1623 int in_target_beneath = 0;
1625 if (!RECORD_FULL_IS_REPLAY)
1627 /* When recording, we currently always single-step, so we don't
1628 really need to install regular breakpoints in the inferior.
1629 However, we do have to insert software single-step
1630 breakpoints, in case the target can't hardware step. To keep
1631 things single, we always insert. */
1632 struct cleanup *old_cleanups;
1635 old_cleanups = record_full_gdb_operation_disable_set ();
1636 ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt);
1637 do_cleanups (old_cleanups);
1642 in_target_beneath = 1;
1645 bp = XNEW (struct record_full_breakpoint);
1646 bp->addr = bp_tgt->placed_address;
1647 bp->address_space = bp_tgt->placed_address_space;
1648 bp->in_target_beneath = in_target_beneath;
1649 VEC_safe_push (record_full_breakpoint_p, record_full_breakpoints, bp);
1653 /* "to_remove_breakpoint" method for process record target. */
1656 record_full_remove_breakpoint (struct target_ops *ops,
1657 struct gdbarch *gdbarch,
1658 struct bp_target_info *bp_tgt)
1660 struct record_full_breakpoint *bp;
1664 VEC_iterate (record_full_breakpoint_p,
1665 record_full_breakpoints, ix, bp);
1668 if (bp->addr == bp_tgt->placed_address
1669 && bp->address_space == bp_tgt->placed_address_space)
1671 if (bp->in_target_beneath)
1673 struct cleanup *old_cleanups;
1676 old_cleanups = record_full_gdb_operation_disable_set ();
1677 ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch,
1679 do_cleanups (old_cleanups);
1685 VEC_unordered_remove (record_full_breakpoint_p,
1686 record_full_breakpoints, ix);
1691 gdb_assert_not_reached ("removing unknown breakpoint");
1694 /* "to_can_execute_reverse" method for process record target. */
1697 record_full_can_execute_reverse (struct target_ops *self)
1702 /* "to_get_bookmark" method for process record and prec over core. */
1705 record_full_get_bookmark (struct target_ops *self, char *args, int from_tty)
1709 /* Return stringified form of instruction count. */
1710 if (record_full_list && record_full_list->type == record_full_end)
1711 ret = xstrdup (pulongest (record_full_list->u.end.insn_num));
1716 fprintf_unfiltered (gdb_stdlog,
1717 "record_full_get_bookmark returns %s\n", ret);
1719 fprintf_unfiltered (gdb_stdlog,
1720 "record_full_get_bookmark returns NULL\n");
1722 return (gdb_byte *) ret;
1725 /* "to_goto_bookmark" method for process record and prec over core. */
1728 record_full_goto_bookmark (struct target_ops *self,
1729 gdb_byte *raw_bookmark, int from_tty)
1731 char *bookmark = (char *) raw_bookmark;
1734 fprintf_unfiltered (gdb_stdlog,
1735 "record_full_goto_bookmark receives %s\n", bookmark);
1737 if (bookmark[0] == '\'' || bookmark[0] == '\"')
1739 if (bookmark[strlen (bookmark) - 1] != bookmark[0])
1740 error (_("Unbalanced quotes: %s"), bookmark);
1742 /* Strip trailing quote. */
1743 bookmark[strlen (bookmark) - 1] = '\0';
1744 /* Strip leading quote. */
1746 /* Pass along to cmd_record_full_goto. */
1749 cmd_record_goto (bookmark, from_tty);
1754 record_full_can_async_p (struct target_ops *ops)
1756 /* We only enable async when the user specifically asks for it. */
1757 return target_async_permitted;
1761 record_full_is_async_p (struct target_ops *ops)
1763 /* We only enable async when the user specifically asks for it. */
1764 return target_async_permitted;
1767 static enum exec_direction_kind
1768 record_full_execution_direction (struct target_ops *self)
1770 return record_full_execution_dir;
1774 record_full_info (struct target_ops *self)
1776 struct record_full_entry *p;
1778 if (RECORD_FULL_IS_REPLAY)
1779 printf_filtered (_("Replay mode:\n"));
1781 printf_filtered (_("Record mode:\n"));
1783 /* Find entry for first actual instruction in the log. */
1784 for (p = record_full_first.next;
1785 p != NULL && p->type != record_full_end;
1789 /* Do we have a log at all? */
1790 if (p != NULL && p->type == record_full_end)
1792 /* Display instruction number for first instruction in the log. */
1793 printf_filtered (_("Lowest recorded instruction number is %s.\n"),
1794 pulongest (p->u.end.insn_num));
1796 /* If in replay mode, display where we are in the log. */
1797 if (RECORD_FULL_IS_REPLAY)
1798 printf_filtered (_("Current instruction number is %s.\n"),
1799 pulongest (record_full_list->u.end.insn_num));
1801 /* Display instruction number for last instruction in the log. */
1802 printf_filtered (_("Highest recorded instruction number is %s.\n"),
1803 pulongest (record_full_insn_count));
1805 /* Display log count. */
1806 printf_filtered (_("Log contains %u instructions.\n"),
1807 record_full_insn_num);
1810 printf_filtered (_("No instructions have been logged.\n"));
1812 /* Display max log size. */
1813 printf_filtered (_("Max logged instructions is %u.\n"),
1814 record_full_insn_max_num);
1817 /* The "to_record_delete" target method. */
1820 record_full_delete (struct target_ops *self)
1822 record_full_list_release_following (record_full_list);
1825 /* The "to_record_is_replaying" target method. */
1828 record_full_is_replaying (struct target_ops *self)
1830 return RECORD_FULL_IS_REPLAY;
1833 /* Go to a specific entry. */
1836 record_full_goto_entry (struct record_full_entry *p)
1839 error (_("Target insn not found."));
1840 else if (p == record_full_list)
1841 error (_("Already at target insn."));
1842 else if (p->u.end.insn_num > record_full_list->u.end.insn_num)
1844 printf_filtered (_("Go forward to insn number %s\n"),
1845 pulongest (p->u.end.insn_num));
1846 record_full_goto_insn (p, EXEC_FORWARD);
1850 printf_filtered (_("Go backward to insn number %s\n"),
1851 pulongest (p->u.end.insn_num));
1852 record_full_goto_insn (p, EXEC_REVERSE);
1855 registers_changed ();
1856 reinit_frame_cache ();
1857 print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1);
1860 /* The "to_goto_record_begin" target method. */
1863 record_full_goto_begin (struct target_ops *self)
1865 struct record_full_entry *p = NULL;
1867 for (p = &record_full_first; p != NULL; p = p->next)
1868 if (p->type == record_full_end)
1871 record_full_goto_entry (p);
1874 /* The "to_goto_record_end" target method. */
1877 record_full_goto_end (void)
1879 struct record_full_entry *p = NULL;
1881 for (p = record_full_list; p->next != NULL; p = p->next)
1883 for (; p!= NULL; p = p->prev)
1884 if (p->type == record_full_end)
1887 record_full_goto_entry (p);
1890 /* The "to_goto_record" target method. */
1893 record_full_goto (ULONGEST target_insn)
1895 struct record_full_entry *p = NULL;
1897 for (p = &record_full_first; p != NULL; p = p->next)
1898 if (p->type == record_full_end && p->u.end.insn_num == target_insn)
1901 record_full_goto_entry (p);
1905 init_record_full_ops (void)
1907 record_full_ops.to_shortname = "record-full";
1908 record_full_ops.to_longname = "Process record and replay target";
1909 record_full_ops.to_doc =
1910 "Log program while executing and replay execution from log.";
1911 record_full_ops.to_open = record_full_open;
1912 record_full_ops.to_close = record_full_close;
1913 record_full_ops.to_resume = record_full_resume;
1914 record_full_ops.to_wait = record_full_wait;
1915 record_full_ops.to_disconnect = record_disconnect;
1916 record_full_ops.to_detach = record_detach;
1917 record_full_ops.to_mourn_inferior = record_mourn_inferior;
1918 record_full_ops.to_kill = record_kill;
1919 record_full_ops.to_create_inferior = find_default_create_inferior;
1920 record_full_ops.to_store_registers = record_full_store_registers;
1921 record_full_ops.to_xfer_partial = record_full_xfer_partial;
1922 record_full_ops.to_insert_breakpoint = record_full_insert_breakpoint;
1923 record_full_ops.to_remove_breakpoint = record_full_remove_breakpoint;
1924 record_full_ops.to_stopped_by_watchpoint = record_full_stopped_by_watchpoint;
1925 record_full_ops.to_stopped_data_address = record_full_stopped_data_address;
1926 record_full_ops.to_can_execute_reverse = record_full_can_execute_reverse;
1927 record_full_ops.to_stratum = record_stratum;
1928 /* Add bookmark target methods. */
1929 record_full_ops.to_get_bookmark = record_full_get_bookmark;
1930 record_full_ops.to_goto_bookmark = record_full_goto_bookmark;
1931 record_full_ops.to_can_async_p = record_full_can_async_p;
1932 record_full_ops.to_is_async_p = record_full_is_async_p;
1933 record_full_ops.to_execution_direction = record_full_execution_direction;
1934 record_full_ops.to_info_record = record_full_info;
1935 record_full_ops.to_save_record = record_full_save;
1936 record_full_ops.to_delete_record = record_full_delete;
1937 record_full_ops.to_record_is_replaying = record_full_is_replaying;
1938 record_full_ops.to_goto_record_begin = record_full_goto_begin;
1939 record_full_ops.to_goto_record_end = record_full_goto_end;
1940 record_full_ops.to_goto_record = record_full_goto;
1941 record_full_ops.to_magic = OPS_MAGIC;
1944 /* "to_resume" method for prec over corefile. */
1947 record_full_core_resume (struct target_ops *ops, ptid_t ptid, int step,
1948 enum gdb_signal signal)
1950 record_full_resume_step = step;
1951 record_full_resumed = 1;
1952 record_full_execution_dir = execution_direction;
1954 /* We are about to start executing the inferior (or simulate it),
1955 let's register it with the event loop. */
1956 if (target_can_async_p ())
1958 target_async (inferior_event_handler, 0);
1960 /* Notify the event loop there's an event to wait for. */
1961 mark_async_event_handler (record_full_async_inferior_event_token);
1965 /* "to_kill" method for prec over corefile. */
1968 record_full_core_kill (struct target_ops *ops)
1971 fprintf_unfiltered (gdb_stdlog, "Process record: record_full_core_kill\n");
1973 unpush_target (&record_full_core_ops);
1976 /* "to_fetch_registers" method for prec over corefile. */
1979 record_full_core_fetch_registers (struct target_ops *ops,
1980 struct regcache *regcache,
1985 int num = gdbarch_num_regs (get_regcache_arch (regcache));
1988 for (i = 0; i < num; i ++)
1989 regcache_raw_supply (regcache, i,
1990 record_full_core_regbuf + MAX_REGISTER_SIZE * i);
1993 regcache_raw_supply (regcache, regno,
1994 record_full_core_regbuf + MAX_REGISTER_SIZE * regno);
1997 /* "to_prepare_to_store" method for prec over corefile. */
2000 record_full_core_prepare_to_store (struct target_ops *self,
2001 struct regcache *regcache)
2005 /* "to_store_registers" method for prec over corefile. */
2008 record_full_core_store_registers (struct target_ops *ops,
2009 struct regcache *regcache,
2012 if (record_full_gdb_operation_disable)
2013 regcache_raw_collect (regcache, regno,
2014 record_full_core_regbuf + MAX_REGISTER_SIZE * regno);
2016 error (_("You can't do that without a process to debug."));
2019 /* "to_xfer_partial" method for prec over corefile. */
2021 static enum target_xfer_status
2022 record_full_core_xfer_partial (struct target_ops *ops,
2023 enum target_object object,
2024 const char *annex, gdb_byte *readbuf,
2025 const gdb_byte *writebuf, ULONGEST offset,
2026 ULONGEST len, ULONGEST *xfered_len)
2028 if (object == TARGET_OBJECT_MEMORY)
2030 if (record_full_gdb_operation_disable || !writebuf)
2032 struct target_section *p;
2034 for (p = record_full_core_start; p < record_full_core_end; p++)
2036 if (offset >= p->addr)
2038 struct record_full_core_buf_entry *entry;
2039 ULONGEST sec_offset;
2041 if (offset >= p->endaddr)
2044 if (offset + len > p->endaddr)
2045 len = p->endaddr - offset;
2047 sec_offset = offset - p->addr;
2049 /* Read readbuf or write writebuf p, offset, len. */
2051 if (p->the_bfd_section->flags & SEC_CONSTRUCTOR
2052 || (p->the_bfd_section->flags & SEC_HAS_CONTENTS) == 0)
2055 memset (readbuf, 0, len);
2058 return TARGET_XFER_OK;
2060 /* Get record_full_core_buf_entry. */
2061 for (entry = record_full_core_buf_list; entry;
2062 entry = entry->prev)
2069 /* Add a new entry. */
2070 entry = (struct record_full_core_buf_entry *)
2072 (sizeof (struct record_full_core_buf_entry));
2074 if (!bfd_malloc_and_get_section
2075 (p->the_bfd_section->owner,
2080 return TARGET_XFER_EOF;
2082 entry->prev = record_full_core_buf_list;
2083 record_full_core_buf_list = entry;
2086 memcpy (entry->buf + sec_offset, writebuf,
2092 return ops->beneath->to_xfer_partial (ops->beneath,
2098 memcpy (readbuf, entry->buf + sec_offset,
2103 return TARGET_XFER_OK;
2107 return TARGET_XFER_E_IO;
2110 error (_("You can't do that without a process to debug."));
2113 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
2114 readbuf, writebuf, offset, len,
2118 /* "to_insert_breakpoint" method for prec over corefile. */
2121 record_full_core_insert_breakpoint (struct target_ops *ops,
2122 struct gdbarch *gdbarch,
2123 struct bp_target_info *bp_tgt)
2128 /* "to_remove_breakpoint" method for prec over corefile. */
2131 record_full_core_remove_breakpoint (struct target_ops *ops,
2132 struct gdbarch *gdbarch,
2133 struct bp_target_info *bp_tgt)
2138 /* "to_has_execution" method for prec over corefile. */
2141 record_full_core_has_execution (struct target_ops *ops, ptid_t the_ptid)
2147 init_record_full_core_ops (void)
2149 record_full_core_ops.to_shortname = "record-core";
2150 record_full_core_ops.to_longname = "Process record and replay target";
2151 record_full_core_ops.to_doc =
2152 "Log program while executing and replay execution from log.";
2153 record_full_core_ops.to_open = record_full_open;
2154 record_full_core_ops.to_close = record_full_close;
2155 record_full_core_ops.to_resume = record_full_core_resume;
2156 record_full_core_ops.to_wait = record_full_wait;
2157 record_full_core_ops.to_kill = record_full_core_kill;
2158 record_full_core_ops.to_fetch_registers = record_full_core_fetch_registers;
2159 record_full_core_ops.to_prepare_to_store = record_full_core_prepare_to_store;
2160 record_full_core_ops.to_store_registers = record_full_core_store_registers;
2161 record_full_core_ops.to_xfer_partial = record_full_core_xfer_partial;
2162 record_full_core_ops.to_insert_breakpoint
2163 = record_full_core_insert_breakpoint;
2164 record_full_core_ops.to_remove_breakpoint
2165 = record_full_core_remove_breakpoint;
2166 record_full_core_ops.to_stopped_by_watchpoint
2167 = record_full_stopped_by_watchpoint;
2168 record_full_core_ops.to_stopped_data_address
2169 = record_full_stopped_data_address;
2170 record_full_core_ops.to_can_execute_reverse
2171 = record_full_can_execute_reverse;
2172 record_full_core_ops.to_has_execution = record_full_core_has_execution;
2173 record_full_core_ops.to_stratum = record_stratum;
2174 /* Add bookmark target methods. */
2175 record_full_core_ops.to_get_bookmark = record_full_get_bookmark;
2176 record_full_core_ops.to_goto_bookmark = record_full_goto_bookmark;
2177 record_full_core_ops.to_can_async_p = record_full_can_async_p;
2178 record_full_core_ops.to_is_async_p = record_full_is_async_p;
2179 record_full_core_ops.to_execution_direction
2180 = record_full_execution_direction;
2181 record_full_core_ops.to_info_record = record_full_info;
2182 record_full_core_ops.to_delete_record = record_full_delete;
2183 record_full_core_ops.to_record_is_replaying = record_full_is_replaying;
2184 record_full_core_ops.to_goto_record_begin = record_full_goto_begin;
2185 record_full_core_ops.to_goto_record_end = record_full_goto_end;
2186 record_full_core_ops.to_goto_record = record_full_goto;
2187 record_full_core_ops.to_magic = OPS_MAGIC;
2190 /* Record log save-file format
2191 Version 1 (never released)
2194 4 bytes: magic number htonl(0x20090829).
2195 NOTE: be sure to change whenever this file format changes!
2199 1 byte: record type (record_full_end, see enum record_full_type).
2201 1 byte: record type (record_full_reg, see enum record_full_type).
2202 8 bytes: register id (network byte order).
2203 MAX_REGISTER_SIZE bytes: register value.
2205 1 byte: record type (record_full_mem, see enum record_full_type).
2206 8 bytes: memory length (network byte order).
2207 8 bytes: memory address (network byte order).
2208 n bytes: memory value (n == memory length).
2211 4 bytes: magic number netorder32(0x20091016).
2212 NOTE: be sure to change whenever this file format changes!
2216 1 byte: record type (record_full_end, see enum record_full_type).
2218 4 bytes: instruction count
2220 1 byte: record type (record_full_reg, see enum record_full_type).
2221 4 bytes: register id (network byte order).
2222 n bytes: register value (n == actual register size).
2223 (eg. 4 bytes for x86 general registers).
2225 1 byte: record type (record_full_mem, see enum record_full_type).
2226 4 bytes: memory length (network byte order).
2227 8 bytes: memory address (network byte order).
2228 n bytes: memory value (n == memory length).
2232 /* bfdcore_read -- read bytes from a core file section. */
2235 bfdcore_read (bfd *obfd, asection *osec, void *buf, int len, int *offset)
2237 int ret = bfd_get_section_contents (obfd, osec, buf, *offset, len);
2242 error (_("Failed to read %d bytes from core file %s ('%s')."),
2243 len, bfd_get_filename (obfd),
2244 bfd_errmsg (bfd_get_error ()));
2247 static inline uint64_t
2248 netorder64 (uint64_t input)
2252 store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret),
2253 BFD_ENDIAN_BIG, input);
2257 static inline uint32_t
2258 netorder32 (uint32_t input)
2262 store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret),
2263 BFD_ENDIAN_BIG, input);
2267 static inline uint16_t
2268 netorder16 (uint16_t input)
2272 store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret),
2273 BFD_ENDIAN_BIG, input);
2277 /* Restore the execution log from a core_bfd file. */
2279 record_full_restore (void)
2282 struct cleanup *old_cleanups;
2283 struct record_full_entry *rec;
2287 struct regcache *regcache;
2289 /* We restore the execution log from the open core bfd,
2291 if (core_bfd == NULL)
2294 /* "record_full_restore" can only be called when record list is empty. */
2295 gdb_assert (record_full_first.next == NULL);
2298 fprintf_unfiltered (gdb_stdlog, "Restoring recording from core file.\n");
2300 /* Now need to find our special note section. */
2301 osec = bfd_get_section_by_name (core_bfd, "null0");
2303 fprintf_unfiltered (gdb_stdlog, "Find precord section %s.\n",
2304 osec ? "succeeded" : "failed");
2307 osec_size = bfd_section_size (core_bfd, osec);
2309 fprintf_unfiltered (gdb_stdlog, "%s", bfd_section_name (core_bfd, osec));
2311 /* Check the magic code. */
2312 bfdcore_read (core_bfd, osec, &magic, sizeof (magic), &bfd_offset);
2313 if (magic != RECORD_FULL_FILE_MAGIC)
2314 error (_("Version mis-match or file format error in core file %s."),
2315 bfd_get_filename (core_bfd));
2317 fprintf_unfiltered (gdb_stdlog,
2318 " Reading 4-byte magic cookie "
2319 "RECORD_FULL_FILE_MAGIC (0x%s)\n",
2320 phex_nz (netorder32 (magic), 4));
2322 /* Restore the entries in recfd into record_full_arch_list_head and
2323 record_full_arch_list_tail. */
2324 record_full_arch_list_head = NULL;
2325 record_full_arch_list_tail = NULL;
2326 record_full_insn_num = 0;
2327 old_cleanups = make_cleanup (record_full_arch_list_cleanups, 0);
2328 regcache = get_current_regcache ();
2333 uint32_t regnum, len, signal, count;
2336 /* We are finished when offset reaches osec_size. */
2337 if (bfd_offset >= osec_size)
2339 bfdcore_read (core_bfd, osec, &rectype, sizeof (rectype), &bfd_offset);
2343 case record_full_reg: /* reg */
2344 /* Get register number to regnum. */
2345 bfdcore_read (core_bfd, osec, ®num,
2346 sizeof (regnum), &bfd_offset);
2347 regnum = netorder32 (regnum);
2349 rec = record_full_reg_alloc (regcache, regnum);
2352 bfdcore_read (core_bfd, osec, record_full_get_loc (rec),
2353 rec->u.reg.len, &bfd_offset);
2356 fprintf_unfiltered (gdb_stdlog,
2357 " Reading register %d (1 "
2358 "plus %lu plus %d bytes)\n",
2360 (unsigned long) sizeof (regnum),
2364 case record_full_mem: /* mem */
2366 bfdcore_read (core_bfd, osec, &len,
2367 sizeof (len), &bfd_offset);
2368 len = netorder32 (len);
2371 bfdcore_read (core_bfd, osec, &addr,
2372 sizeof (addr), &bfd_offset);
2373 addr = netorder64 (addr);
2375 rec = record_full_mem_alloc (addr, len);
2378 bfdcore_read (core_bfd, osec, record_full_get_loc (rec),
2379 rec->u.mem.len, &bfd_offset);
2382 fprintf_unfiltered (gdb_stdlog,
2383 " Reading memory %s (1 plus "
2384 "%lu plus %lu plus %d bytes)\n",
2385 paddress (get_current_arch (),
2387 (unsigned long) sizeof (addr),
2388 (unsigned long) sizeof (len),
2392 case record_full_end: /* end */
2393 rec = record_full_end_alloc ();
2394 record_full_insn_num ++;
2396 /* Get signal value. */
2397 bfdcore_read (core_bfd, osec, &signal,
2398 sizeof (signal), &bfd_offset);
2399 signal = netorder32 (signal);
2400 rec->u.end.sigval = signal;
2402 /* Get insn count. */
2403 bfdcore_read (core_bfd, osec, &count,
2404 sizeof (count), &bfd_offset);
2405 count = netorder32 (count);
2406 rec->u.end.insn_num = count;
2407 record_full_insn_count = count + 1;
2409 fprintf_unfiltered (gdb_stdlog,
2410 " Reading record_full_end (1 + "
2411 "%lu + %lu bytes), offset == %s\n",
2412 (unsigned long) sizeof (signal),
2413 (unsigned long) sizeof (count),
2414 paddress (get_current_arch (),
2419 error (_("Bad entry type in core file %s."),
2420 bfd_get_filename (core_bfd));
2424 /* Add rec to record arch list. */
2425 record_full_arch_list_add (rec);
2428 discard_cleanups (old_cleanups);
2430 /* Add record_full_arch_list_head to the end of record list. */
2431 record_full_first.next = record_full_arch_list_head;
2432 record_full_arch_list_head->prev = &record_full_first;
2433 record_full_arch_list_tail->next = NULL;
2434 record_full_list = &record_full_first;
2436 /* Update record_full_insn_max_num. */
2437 if (record_full_insn_num > record_full_insn_max_num)
2439 record_full_insn_max_num = record_full_insn_num;
2440 warning (_("Auto increase record/replay buffer limit to %u."),
2441 record_full_insn_max_num);
2445 printf_filtered (_("Restored records from core file %s.\n"),
2446 bfd_get_filename (core_bfd));
2448 print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1);
2451 /* bfdcore_write -- write bytes into a core file section. */
2454 bfdcore_write (bfd *obfd, asection *osec, void *buf, int len, int *offset)
2456 int ret = bfd_set_section_contents (obfd, osec, buf, *offset, len);
2461 error (_("Failed to write %d bytes to core file %s ('%s')."),
2462 len, bfd_get_filename (obfd),
2463 bfd_errmsg (bfd_get_error ()));
2466 /* Restore the execution log from a file. We use a modified elf
2467 corefile format, with an extra section for our data. */
2470 cmd_record_full_restore (char *args, int from_tty)
2472 core_file_command (args, from_tty);
2473 record_full_open (args, from_tty);
2477 record_full_save_cleanups (void *data)
2480 char *pathname = xstrdup (bfd_get_filename (obfd));
2482 gdb_bfd_unref (obfd);
2487 /* Save the execution log to a file. We use a modified elf corefile
2488 format, with an extra section for our data. */
2491 record_full_save (struct target_ops *self, const char *recfilename)
2493 struct record_full_entry *cur_record_full_list;
2495 struct regcache *regcache;
2496 struct gdbarch *gdbarch;
2497 struct cleanup *old_cleanups;
2498 struct cleanup *set_cleanups;
2501 asection *osec = NULL;
2504 /* Open the save file. */
2506 fprintf_unfiltered (gdb_stdlog, "Saving execution log to core file '%s'\n",
2509 /* Open the output file. */
2510 obfd = create_gcore_bfd (recfilename);
2511 old_cleanups = make_cleanup (record_full_save_cleanups, obfd);
2513 /* Save the current record entry to "cur_record_full_list". */
2514 cur_record_full_list = record_full_list;
2516 /* Get the values of regcache and gdbarch. */
2517 regcache = get_current_regcache ();
2518 gdbarch = get_regcache_arch (regcache);
2520 /* Disable the GDB operation record. */
2521 set_cleanups = record_full_gdb_operation_disable_set ();
2523 /* Reverse execute to the begin of record list. */
2526 /* Check for beginning and end of log. */
2527 if (record_full_list == &record_full_first)
2530 record_full_exec_insn (regcache, gdbarch, record_full_list);
2532 if (record_full_list->prev)
2533 record_full_list = record_full_list->prev;
2536 /* Compute the size needed for the extra bfd section. */
2537 save_size = 4; /* magic cookie */
2538 for (record_full_list = record_full_first.next; record_full_list;
2539 record_full_list = record_full_list->next)
2540 switch (record_full_list->type)
2542 case record_full_end:
2543 save_size += 1 + 4 + 4;
2545 case record_full_reg:
2546 save_size += 1 + 4 + record_full_list->u.reg.len;
2548 case record_full_mem:
2549 save_size += 1 + 4 + 8 + record_full_list->u.mem.len;
2553 /* Make the new bfd section. */
2554 osec = bfd_make_section_anyway_with_flags (obfd, "precord",
2558 error (_("Failed to create 'precord' section for corefile %s: %s"),
2560 bfd_errmsg (bfd_get_error ()));
2561 bfd_set_section_size (obfd, osec, save_size);
2562 bfd_set_section_vma (obfd, osec, 0);
2563 bfd_set_section_alignment (obfd, osec, 0);
2564 bfd_section_lma (obfd, osec) = 0;
2566 /* Save corefile state. */
2567 write_gcore_file (obfd);
2569 /* Write out the record log. */
2570 /* Write the magic code. */
2571 magic = RECORD_FULL_FILE_MAGIC;
2573 fprintf_unfiltered (gdb_stdlog,
2574 " Writing 4-byte magic cookie "
2575 "RECORD_FULL_FILE_MAGIC (0x%s)\n",
2576 phex_nz (magic, 4));
2577 bfdcore_write (obfd, osec, &magic, sizeof (magic), &bfd_offset);
2579 /* Save the entries to recfd and forward execute to the end of
2581 record_full_list = &record_full_first;
2585 if (record_full_list != &record_full_first)
2588 uint32_t regnum, len, signal, count;
2591 type = record_full_list->type;
2592 bfdcore_write (obfd, osec, &type, sizeof (type), &bfd_offset);
2594 switch (record_full_list->type)
2596 case record_full_reg: /* reg */
2598 fprintf_unfiltered (gdb_stdlog,
2599 " Writing register %d (1 "
2600 "plus %lu plus %d bytes)\n",
2601 record_full_list->u.reg.num,
2602 (unsigned long) sizeof (regnum),
2603 record_full_list->u.reg.len);
2606 regnum = netorder32 (record_full_list->u.reg.num);
2607 bfdcore_write (obfd, osec, ®num,
2608 sizeof (regnum), &bfd_offset);
2611 bfdcore_write (obfd, osec,
2612 record_full_get_loc (record_full_list),
2613 record_full_list->u.reg.len, &bfd_offset);
2616 case record_full_mem: /* mem */
2618 fprintf_unfiltered (gdb_stdlog,
2619 " Writing memory %s (1 plus "
2620 "%lu plus %lu plus %d bytes)\n",
2622 record_full_list->u.mem.addr),
2623 (unsigned long) sizeof (addr),
2624 (unsigned long) sizeof (len),
2625 record_full_list->u.mem.len);
2628 len = netorder32 (record_full_list->u.mem.len);
2629 bfdcore_write (obfd, osec, &len, sizeof (len), &bfd_offset);
2631 /* Write memaddr. */
2632 addr = netorder64 (record_full_list->u.mem.addr);
2633 bfdcore_write (obfd, osec, &addr,
2634 sizeof (addr), &bfd_offset);
2637 bfdcore_write (obfd, osec,
2638 record_full_get_loc (record_full_list),
2639 record_full_list->u.mem.len, &bfd_offset);
2642 case record_full_end:
2644 fprintf_unfiltered (gdb_stdlog,
2645 " Writing record_full_end (1 + "
2646 "%lu + %lu bytes)\n",
2647 (unsigned long) sizeof (signal),
2648 (unsigned long) sizeof (count));
2649 /* Write signal value. */
2650 signal = netorder32 (record_full_list->u.end.sigval);
2651 bfdcore_write (obfd, osec, &signal,
2652 sizeof (signal), &bfd_offset);
2654 /* Write insn count. */
2655 count = netorder32 (record_full_list->u.end.insn_num);
2656 bfdcore_write (obfd, osec, &count,
2657 sizeof (count), &bfd_offset);
2662 /* Execute entry. */
2663 record_full_exec_insn (regcache, gdbarch, record_full_list);
2665 if (record_full_list->next)
2666 record_full_list = record_full_list->next;
2671 /* Reverse execute to cur_record_full_list. */
2674 /* Check for beginning and end of log. */
2675 if (record_full_list == cur_record_full_list)
2678 record_full_exec_insn (regcache, gdbarch, record_full_list);
2680 if (record_full_list->prev)
2681 record_full_list = record_full_list->prev;
2684 do_cleanups (set_cleanups);
2685 gdb_bfd_unref (obfd);
2686 discard_cleanups (old_cleanups);
2689 printf_filtered (_("Saved core file %s with execution log.\n"),
2693 /* record_full_goto_insn -- rewind the record log (forward or backward,
2694 depending on DIR) to the given entry, changing the program state
2698 record_full_goto_insn (struct record_full_entry *entry,
2699 enum exec_direction_kind dir)
2701 struct cleanup *set_cleanups = record_full_gdb_operation_disable_set ();
2702 struct regcache *regcache = get_current_regcache ();
2703 struct gdbarch *gdbarch = get_regcache_arch (regcache);
2705 /* Assume everything is valid: we will hit the entry,
2706 and we will not hit the end of the recording. */
2708 if (dir == EXEC_FORWARD)
2709 record_full_list = record_full_list->next;
2713 record_full_exec_insn (regcache, gdbarch, record_full_list);
2714 if (dir == EXEC_REVERSE)
2715 record_full_list = record_full_list->prev;
2717 record_full_list = record_full_list->next;
2718 } while (record_full_list != entry);
2719 do_cleanups (set_cleanups);
2722 /* Alias for "target record-full". */
2725 cmd_record_full_start (char *args, int from_tty)
2727 execute_command ("target record-full", from_tty);
2731 set_record_full_insn_max_num (char *args, int from_tty,
2732 struct cmd_list_element *c)
2734 if (record_full_insn_num > record_full_insn_max_num)
2736 /* Count down record_full_insn_num while releasing records from list. */
2737 while (record_full_insn_num > record_full_insn_max_num)
2739 record_full_list_release_first ();
2740 record_full_insn_num--;
2745 /* The "set record full" command. */
2748 set_record_full_command (char *args, int from_tty)
2750 printf_unfiltered (_("\"set record full\" must be followed "
2751 "by an apporpriate subcommand.\n"));
2752 help_list (set_record_full_cmdlist, "set record full ", all_commands,
2756 /* The "show record full" command. */
2759 show_record_full_command (char *args, int from_tty)
2761 cmd_show_list (show_record_full_cmdlist, from_tty, "");
2764 /* Provide a prototype to silence -Wmissing-prototypes. */
2765 extern initialize_file_ftype _initialize_record_full;
2768 _initialize_record_full (void)
2770 struct cmd_list_element *c;
2772 /* Init record_full_first. */
2773 record_full_first.prev = NULL;
2774 record_full_first.next = NULL;
2775 record_full_first.type = record_full_end;
2777 init_record_full_ops ();
2778 add_target (&record_full_ops);
2779 add_deprecated_target_alias (&record_full_ops, "record");
2780 init_record_full_core_ops ();
2781 add_target (&record_full_core_ops);
2783 add_prefix_cmd ("full", class_obscure, cmd_record_full_start,
2784 _("Start full execution recording."), &record_full_cmdlist,
2785 "record full ", 0, &record_cmdlist);
2787 c = add_cmd ("restore", class_obscure, cmd_record_full_restore,
2788 _("Restore the execution log from a file.\n\
2789 Argument is filename. File must be created with 'record save'."),
2790 &record_full_cmdlist);
2791 set_cmd_completer (c, filename_completer);
2793 /* Deprecate the old version without "full" prefix. */
2794 c = add_alias_cmd ("restore", "full restore", class_obscure, 1,
2796 set_cmd_completer (c, filename_completer);
2797 deprecate_cmd (c, "record full restore");
2799 add_prefix_cmd ("full", class_support, set_record_full_command,
2800 _("Set record options"), &set_record_full_cmdlist,
2801 "set record full ", 0, &set_record_cmdlist);
2803 add_prefix_cmd ("full", class_support, show_record_full_command,
2804 _("Show record options"), &show_record_full_cmdlist,
2805 "show record full ", 0, &show_record_cmdlist);
2807 /* Record instructions number limit command. */
2808 add_setshow_boolean_cmd ("stop-at-limit", no_class,
2809 &record_full_stop_at_limit, _("\
2810 Set whether record/replay stops when record/replay buffer becomes full."), _("\
2811 Show whether record/replay stops when record/replay buffer becomes full."),
2812 _("Default is ON.\n\
2813 When ON, if the record/replay buffer becomes full, ask user what to do.\n\
2814 When OFF, if the record/replay buffer becomes full,\n\
2815 delete the oldest recorded instruction to make room for each new one."),
2817 &set_record_full_cmdlist, &show_record_full_cmdlist);
2819 c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1,
2820 &set_record_cmdlist);
2821 deprecate_cmd (c, "set record full stop-at-limit");
2823 c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1,
2824 &show_record_cmdlist);
2825 deprecate_cmd (c, "show record full stop-at-limit");
2827 add_setshow_uinteger_cmd ("insn-number-max", no_class,
2828 &record_full_insn_max_num,
2829 _("Set record/replay buffer limit."),
2830 _("Show record/replay buffer limit."), _("\
2831 Set the maximum number of instructions to be stored in the\n\
2832 record/replay buffer. A value of either \"unlimited\" or zero means no\n\
2833 limit. Default is 200000."),
2834 set_record_full_insn_max_num,
2835 NULL, &set_record_full_cmdlist,
2836 &show_record_full_cmdlist);
2838 c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1,
2839 &set_record_cmdlist);
2840 deprecate_cmd (c, "set record full insn-number-max");
2842 c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1,
2843 &show_record_cmdlist);
2844 deprecate_cmd (c, "show record full insn-number-max");
2846 add_setshow_boolean_cmd ("memory-query", no_class,
2847 &record_full_memory_query, _("\
2848 Set whether query if PREC cannot record memory change of next instruction."),
2850 Show whether query if PREC cannot record memory change of next instruction."),
2853 When ON, query if PREC cannot record memory change of next instruction."),
2855 &set_record_full_cmdlist,
2856 &show_record_full_cmdlist);
2858 c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1,
2859 &set_record_cmdlist);
2860 deprecate_cmd (c, "set record full memory-query");
2862 c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1,
2863 &show_record_cmdlist);
2864 deprecate_cmd (c, "show record full memory-query");