1 /* Process record and replay target for GDB, the GNU debugger.
3 Copyright (C) 2013-2015 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 (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
655 = (struct record_full_message_args *) args;
657 return record_full_message (record_full_args->regcache,
658 record_full_args->signal);
662 record_full_message_wrapper_safe (struct regcache *regcache,
663 enum gdb_signal signal)
665 struct record_full_message_args args;
667 args.regcache = regcache;
668 args.signal = signal;
670 return catch_errors (record_full_message_wrapper, &args, NULL,
674 /* Set to 1 if record_full_store_registers and record_full_xfer_partial
675 doesn't need record. */
677 static int record_full_gdb_operation_disable = 0;
680 record_full_gdb_operation_disable_set (void)
682 struct cleanup *old_cleanups = NULL;
685 make_cleanup_restore_integer (&record_full_gdb_operation_disable);
686 record_full_gdb_operation_disable = 1;
691 /* Flag set to TRUE for target_stopped_by_watchpoint. */
692 static enum target_stop_reason record_full_stop_reason
693 = TARGET_STOPPED_BY_NO_REASON;
695 /* Execute one instruction from the record log. Each instruction in
696 the log will be represented by an arbitrary sequence of register
697 entries and memory entries, followed by an 'end' entry. */
700 record_full_exec_insn (struct regcache *regcache,
701 struct gdbarch *gdbarch,
702 struct record_full_entry *entry)
706 case record_full_reg: /* reg */
708 gdb_byte reg[MAX_REGISTER_SIZE];
710 if (record_debug > 1)
711 fprintf_unfiltered (gdb_stdlog,
712 "Process record: record_full_reg %s to "
713 "inferior num = %d.\n",
714 host_address_to_string (entry),
717 regcache_cooked_read (regcache, entry->u.reg.num, reg);
718 regcache_cooked_write (regcache, entry->u.reg.num,
719 record_full_get_loc (entry));
720 memcpy (record_full_get_loc (entry), reg, entry->u.reg.len);
724 case record_full_mem: /* mem */
726 /* Nothing to do if the entry is flagged not_accessible. */
727 if (!entry->u.mem.mem_entry_not_accessible)
729 gdb_byte *mem = (gdb_byte *) alloca (entry->u.mem.len);
731 if (record_debug > 1)
732 fprintf_unfiltered (gdb_stdlog,
733 "Process record: record_full_mem %s to "
734 "inferior addr = %s len = %d.\n",
735 host_address_to_string (entry),
736 paddress (gdbarch, entry->u.mem.addr),
739 if (record_read_memory (gdbarch,
740 entry->u.mem.addr, mem, entry->u.mem.len))
741 entry->u.mem.mem_entry_not_accessible = 1;
744 if (target_write_memory (entry->u.mem.addr,
745 record_full_get_loc (entry),
748 entry->u.mem.mem_entry_not_accessible = 1;
750 warning (_("Process record: error writing memory at "
751 "addr = %s len = %d."),
752 paddress (gdbarch, entry->u.mem.addr),
757 memcpy (record_full_get_loc (entry), mem,
760 /* We've changed memory --- check if a hardware
761 watchpoint should trap. Note that this
762 presently assumes the target beneath supports
763 continuable watchpoints. On non-continuable
764 watchpoints target, we'll want to check this
765 _before_ actually doing the memory change, and
766 not doing the change at all if the watchpoint
768 if (hardware_watchpoint_inserted_in_range
769 (get_regcache_aspace (regcache),
770 entry->u.mem.addr, entry->u.mem.len))
771 record_full_stop_reason = TARGET_STOPPED_BY_WATCHPOINT;
780 static void record_full_restore (void);
782 /* Asynchronous signal handle registered as event loop source for when
783 we have pending events ready to be passed to the core. */
785 static struct async_event_handler *record_full_async_inferior_event_token;
788 record_full_async_inferior_event_handler (gdb_client_data data)
790 inferior_event_handler (INF_REG_EVENT, NULL);
793 /* Open the process record target. */
796 record_full_core_open_1 (const char *name, int from_tty)
798 struct regcache *regcache = get_current_regcache ();
799 int regnum = gdbarch_num_regs (get_regcache_arch (regcache));
802 /* Get record_full_core_regbuf. */
803 target_fetch_registers (regcache, -1);
804 record_full_core_regbuf = (gdb_byte *) xmalloc (MAX_REGISTER_SIZE * regnum);
805 for (i = 0; i < regnum; i ++)
806 regcache_raw_collect (regcache, i,
807 record_full_core_regbuf + MAX_REGISTER_SIZE * i);
809 /* Get record_full_core_start and record_full_core_end. */
810 if (build_section_table (core_bfd, &record_full_core_start,
811 &record_full_core_end))
813 xfree (record_full_core_regbuf);
814 record_full_core_regbuf = NULL;
815 error (_("\"%s\": Can't find sections: %s"),
816 bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ()));
819 push_target (&record_full_core_ops);
820 record_full_restore ();
823 /* "to_open" target method for 'live' processes. */
826 record_full_open_1 (const char *name, int from_tty)
829 fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open\n");
832 if (!target_has_execution)
833 error (_("Process record: the program is not being run."));
835 error (_("Process record target can't debug inferior in non-stop mode "
838 if (!gdbarch_process_record_p (target_gdbarch ()))
839 error (_("Process record: the current architecture doesn't support "
840 "record function."));
842 push_target (&record_full_ops);
845 static void record_full_init_record_breakpoints (void);
847 /* "to_open" target method. Open the process record target. */
850 record_full_open (const char *name, int from_tty)
852 struct target_ops *t;
855 fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open\n");
860 record_full_insn_num = 0;
861 record_full_insn_count = 0;
862 record_full_list = &record_full_first;
863 record_full_list->next = NULL;
866 record_full_core_open_1 (name, from_tty);
868 record_full_open_1 (name, from_tty);
870 /* Register extra event sources in the event loop. */
871 record_full_async_inferior_event_token
872 = create_async_event_handler (record_full_async_inferior_event_handler,
875 record_full_init_record_breakpoints ();
877 observer_notify_record_changed (current_inferior (), 1);
880 /* "to_close" target method. Close the process record target. */
883 record_full_close (struct target_ops *self)
885 struct record_full_core_buf_entry *entry;
888 fprintf_unfiltered (gdb_stdlog, "Process record: record_full_close\n");
890 record_full_list_release (record_full_list);
892 /* Release record_full_core_regbuf. */
893 if (record_full_core_regbuf)
895 xfree (record_full_core_regbuf);
896 record_full_core_regbuf = NULL;
899 /* Release record_full_core_buf_list. */
900 if (record_full_core_buf_list)
902 for (entry = record_full_core_buf_list->prev; entry;
905 xfree (record_full_core_buf_list);
906 record_full_core_buf_list = entry;
908 record_full_core_buf_list = NULL;
911 if (record_full_async_inferior_event_token)
912 delete_async_event_handler (&record_full_async_inferior_event_token);
915 /* "to_async" target method. */
918 record_full_async (struct target_ops *ops, int enable)
921 mark_async_event_handler (record_full_async_inferior_event_token);
923 clear_async_event_handler (record_full_async_inferior_event_token);
925 ops->beneath->to_async (ops->beneath, enable);
928 static int record_full_resume_step = 0;
930 /* True if we've been resumed, and so each record_full_wait call should
931 advance execution. If this is false, record_full_wait will return a
932 TARGET_WAITKIND_IGNORE. */
933 static int record_full_resumed = 0;
935 /* The execution direction of the last resume we got. This is
936 necessary for async mode. Vis (order is not strictly accurate):
938 1. user has the global execution direction set to forward
939 2. user does a reverse-step command
940 3. record_full_resume is called with global execution direction
941 temporarily switched to reverse
942 4. GDB's execution direction is reverted back to forward
943 5. target record notifies event loop there's an event to handle
944 6. infrun asks the target which direction was it going, and switches
945 the global execution direction accordingly (to reverse)
946 7. infrun polls an event out of the record target, and handles it
947 8. GDB goes back to the event loop, and goto #4.
949 static enum exec_direction_kind record_full_execution_dir = EXEC_FORWARD;
951 /* "to_resume" target method. Resume the process record target. */
954 record_full_resume (struct target_ops *ops, ptid_t ptid, int step,
955 enum gdb_signal signal)
957 record_full_resume_step = step;
958 record_full_resumed = 1;
959 record_full_execution_dir = execution_direction;
961 if (!RECORD_FULL_IS_REPLAY)
963 struct gdbarch *gdbarch = target_thread_architecture (ptid);
965 record_full_message (get_current_regcache (), signal);
969 /* This is not hard single step. */
970 if (!gdbarch_software_single_step_p (gdbarch))
972 /* This is a normal continue. */
977 /* This arch support soft sigle step. */
978 if (thread_has_single_step_breakpoints_set (inferior_thread ()))
980 /* This is a soft single step. */
981 record_full_resume_step = 1;
985 /* This is a continue.
986 Try to insert a soft single step breakpoint. */
987 if (!gdbarch_software_single_step (gdbarch,
988 get_current_frame ()))
990 /* This system don't want use soft single step.
991 Use hard sigle step. */
998 /* Make sure the target beneath reports all signals. */
999 target_pass_signals (0, NULL);
1001 ops->beneath->to_resume (ops->beneath, ptid, step, signal);
1004 /* We are about to start executing the inferior (or simulate it),
1005 let's register it with the event loop. */
1006 if (target_can_async_p ())
1010 static int record_full_get_sig = 0;
1012 /* SIGINT signal handler, registered by "to_wait" method. */
1015 record_full_sig_handler (int signo)
1018 fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\n");
1020 /* It will break the running inferior in replay mode. */
1021 record_full_resume_step = 1;
1023 /* It will let record_full_wait set inferior status to get the signal
1025 record_full_get_sig = 1;
1029 record_full_wait_cleanups (void *ignore)
1031 if (execution_direction == EXEC_REVERSE)
1033 if (record_full_list->next)
1034 record_full_list = record_full_list->next;
1037 record_full_list = record_full_list->prev;
1040 /* "to_wait" target method for process record target.
1042 In record mode, the target is always run in singlestep mode
1043 (even when gdb says to continue). The to_wait method intercepts
1044 the stop events and determines which ones are to be passed on to
1045 gdb. Most stop events are just singlestep events that gdb is not
1046 to know about, so the to_wait method just records them and keeps
1049 In replay mode, this function emulates the recorded execution log,
1050 one instruction at a time (forward or backward), and determines
1054 record_full_wait_1 (struct target_ops *ops,
1055 ptid_t ptid, struct target_waitstatus *status,
1058 struct cleanup *set_cleanups = record_full_gdb_operation_disable_set ();
1061 fprintf_unfiltered (gdb_stdlog,
1062 "Process record: record_full_wait "
1063 "record_full_resume_step = %d, "
1064 "record_full_resumed = %d, direction=%s\n",
1065 record_full_resume_step, record_full_resumed,
1066 record_full_execution_dir == EXEC_FORWARD
1067 ? "forward" : "reverse");
1069 if (!record_full_resumed)
1071 gdb_assert ((options & TARGET_WNOHANG) != 0);
1073 /* No interesting event. */
1074 status->kind = TARGET_WAITKIND_IGNORE;
1075 return minus_one_ptid;
1078 record_full_get_sig = 0;
1079 signal (SIGINT, record_full_sig_handler);
1081 record_full_stop_reason = TARGET_STOPPED_BY_NO_REASON;
1083 if (!RECORD_FULL_IS_REPLAY && ops != &record_full_core_ops)
1085 if (record_full_resume_step)
1087 /* This is a single step. */
1088 return ops->beneath->to_wait (ops->beneath, ptid, status, options);
1092 /* This is not a single step. */
1095 struct gdbarch *gdbarch = target_thread_architecture (inferior_ptid);
1099 struct thread_info *tp;
1101 ret = ops->beneath->to_wait (ops->beneath, ptid, status, options);
1102 if (status->kind == TARGET_WAITKIND_IGNORE)
1105 fprintf_unfiltered (gdb_stdlog,
1106 "Process record: record_full_wait "
1107 "target beneath not done yet\n");
1111 ALL_NON_EXITED_THREADS (tp)
1112 delete_single_step_breakpoints (tp);
1114 if (record_full_resume_step)
1117 /* Is this a SIGTRAP? */
1118 if (status->kind == TARGET_WAITKIND_STOPPED
1119 && status->value.sig == GDB_SIGNAL_TRAP)
1121 struct regcache *regcache;
1122 struct address_space *aspace;
1123 enum target_stop_reason *stop_reason_p
1124 = &record_full_stop_reason;
1126 /* Yes -- this is likely our single-step finishing,
1127 but check if there's any reason the core would be
1128 interested in the event. */
1130 registers_changed ();
1131 regcache = get_current_regcache ();
1132 tmp_pc = regcache_read_pc (regcache);
1133 aspace = get_regcache_aspace (regcache);
1135 if (target_stopped_by_watchpoint ())
1137 /* Always interested in watchpoints. */
1139 else if (record_check_stopped_by_breakpoint (aspace, tmp_pc,
1142 /* There is a breakpoint here. Let the core
1147 /* This is a single-step trap. Record the
1148 insn and issue another step.
1149 FIXME: this part can be a random SIGTRAP too.
1150 But GDB cannot handle it. */
1153 if (!record_full_message_wrapper_safe (regcache,
1156 status->kind = TARGET_WAITKIND_STOPPED;
1157 status->value.sig = GDB_SIGNAL_0;
1161 if (gdbarch_software_single_step_p (gdbarch))
1163 /* Try to insert the software single step breakpoint.
1164 If insert success, set step to 0. */
1165 set_executing (inferior_ptid, 0);
1166 reinit_frame_cache ();
1167 if (gdbarch_software_single_step (gdbarch,
1168 get_current_frame ()))
1170 set_executing (inferior_ptid, 1);
1174 fprintf_unfiltered (gdb_stdlog,
1175 "Process record: record_full_wait "
1176 "issuing one more step in the "
1177 "target beneath\n");
1178 ops->beneath->to_resume (ops->beneath, ptid, step,
1184 /* The inferior is broken by a breakpoint or a signal. */
1193 struct regcache *regcache = get_current_regcache ();
1194 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1195 struct address_space *aspace = get_regcache_aspace (regcache);
1196 int continue_flag = 1;
1197 int first_record_full_end = 1;
1198 struct cleanup *old_cleanups
1199 = make_cleanup (record_full_wait_cleanups, 0);
1202 record_full_stop_reason = TARGET_STOPPED_BY_NO_REASON;
1203 status->kind = TARGET_WAITKIND_STOPPED;
1205 /* Check breakpoint when forward execute. */
1206 if (execution_direction == EXEC_FORWARD)
1208 tmp_pc = regcache_read_pc (regcache);
1209 if (record_check_stopped_by_breakpoint (aspace, tmp_pc,
1210 &record_full_stop_reason))
1213 fprintf_unfiltered (gdb_stdlog,
1214 "Process record: break at %s.\n",
1215 paddress (gdbarch, tmp_pc));
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 (record_check_stopped_by_breakpoint (aspace, tmp_pc,
1284 &record_full_stop_reason))
1287 fprintf_unfiltered (gdb_stdlog,
1288 "Process record: break "
1290 paddress (gdbarch, tmp_pc));
1295 if (record_full_stop_reason == TARGET_STOPPED_BY_WATCHPOINT)
1298 fprintf_unfiltered (gdb_stdlog,
1299 "Process record: hit hw "
1303 /* Check target signal */
1304 if (record_full_list->u.end.sigval != GDB_SIGNAL_0)
1305 /* FIXME: better way to check */
1312 if (execution_direction == EXEC_REVERSE)
1314 if (record_full_list->prev)
1315 record_full_list = record_full_list->prev;
1319 if (record_full_list->next)
1320 record_full_list = record_full_list->next;
1324 while (continue_flag);
1327 if (record_full_get_sig)
1328 status->value.sig = GDB_SIGNAL_INT;
1329 else if (record_full_list->u.end.sigval != GDB_SIGNAL_0)
1330 /* FIXME: better way to check */
1331 status->value.sig = record_full_list->u.end.sigval;
1333 status->value.sig = GDB_SIGNAL_TRAP;
1335 discard_cleanups (old_cleanups);
1338 signal (SIGINT, handle_sigint);
1340 do_cleanups (set_cleanups);
1341 return inferior_ptid;
1345 record_full_wait (struct target_ops *ops,
1346 ptid_t ptid, struct target_waitstatus *status,
1351 return_ptid = record_full_wait_1 (ops, ptid, status, options);
1352 if (status->kind != TARGET_WAITKIND_IGNORE)
1354 /* We're reporting a stop. Make sure any spurious
1355 target_wait(WNOHANG) doesn't advance the target until the
1356 core wants us resumed again. */
1357 record_full_resumed = 0;
1363 record_full_stopped_by_watchpoint (struct target_ops *ops)
1365 if (RECORD_FULL_IS_REPLAY)
1366 return record_full_stop_reason == TARGET_STOPPED_BY_WATCHPOINT;
1368 return ops->beneath->to_stopped_by_watchpoint (ops->beneath);
1372 record_full_stopped_data_address (struct target_ops *ops, CORE_ADDR *addr_p)
1374 if (RECORD_FULL_IS_REPLAY)
1377 return ops->beneath->to_stopped_data_address (ops->beneath, addr_p);
1380 /* The to_stopped_by_sw_breakpoint method of target record-full. */
1383 record_full_stopped_by_sw_breakpoint (struct target_ops *ops)
1385 return record_full_stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT;
1388 /* The to_supports_stopped_by_sw_breakpoint method of target
1392 record_full_supports_stopped_by_sw_breakpoint (struct target_ops *ops)
1397 /* The to_stopped_by_hw_breakpoint method of target record-full. */
1400 record_full_stopped_by_hw_breakpoint (struct target_ops *ops)
1402 return record_full_stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT;
1405 /* The to_supports_stopped_by_sw_breakpoint method of target
1409 record_full_supports_stopped_by_hw_breakpoint (struct target_ops *ops)
1414 /* Record registers change (by user or by GDB) to list as an instruction. */
1417 record_full_registers_change (struct regcache *regcache, int regnum)
1419 /* Check record_full_insn_num. */
1420 record_full_check_insn_num (0);
1422 record_full_arch_list_head = NULL;
1423 record_full_arch_list_tail = NULL;
1429 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
1431 if (record_full_arch_list_add_reg (regcache, i))
1433 record_full_list_release (record_full_arch_list_tail);
1434 error (_("Process record: failed to record execution log."));
1440 if (record_full_arch_list_add_reg (regcache, regnum))
1442 record_full_list_release (record_full_arch_list_tail);
1443 error (_("Process record: failed to record execution log."));
1446 if (record_full_arch_list_add_end ())
1448 record_full_list_release (record_full_arch_list_tail);
1449 error (_("Process record: failed to record execution log."));
1451 record_full_list->next = record_full_arch_list_head;
1452 record_full_arch_list_head->prev = record_full_list;
1453 record_full_list = record_full_arch_list_tail;
1455 if (record_full_insn_num == record_full_insn_max_num)
1456 record_full_list_release_first ();
1458 record_full_insn_num++;
1461 /* "to_store_registers" method for process record target. */
1464 record_full_store_registers (struct target_ops *ops,
1465 struct regcache *regcache,
1468 if (!record_full_gdb_operation_disable)
1470 if (RECORD_FULL_IS_REPLAY)
1474 /* Let user choose if he wants to write register or not. */
1477 query (_("Because GDB is in replay mode, changing the "
1478 "value of a register will make the execution "
1479 "log unusable from this point onward. "
1480 "Change all registers?"));
1483 query (_("Because GDB is in replay mode, changing the value "
1484 "of a register will make the execution log unusable "
1485 "from this point onward. Change register %s?"),
1486 gdbarch_register_name (get_regcache_arch (regcache),
1491 /* Invalidate the value of regcache that was set in function
1492 "regcache_raw_write". */
1498 i < gdbarch_num_regs (get_regcache_arch (regcache));
1500 regcache_invalidate (regcache, i);
1503 regcache_invalidate (regcache, regno);
1505 error (_("Process record canceled the operation."));
1508 /* Destroy the record from here forward. */
1509 record_full_list_release_following (record_full_list);
1512 record_full_registers_change (regcache, regno);
1514 ops->beneath->to_store_registers (ops->beneath, regcache, regno);
1517 /* "to_xfer_partial" method. Behavior is conditional on
1518 RECORD_FULL_IS_REPLAY.
1519 In replay mode, we cannot write memory unles we are willing to
1520 invalidate the record/replay log from this point forward. */
1522 static enum target_xfer_status
1523 record_full_xfer_partial (struct target_ops *ops, enum target_object object,
1524 const char *annex, gdb_byte *readbuf,
1525 const gdb_byte *writebuf, ULONGEST offset,
1526 ULONGEST len, ULONGEST *xfered_len)
1528 if (!record_full_gdb_operation_disable
1529 && (object == TARGET_OBJECT_MEMORY
1530 || object == TARGET_OBJECT_RAW_MEMORY) && writebuf)
1532 if (RECORD_FULL_IS_REPLAY)
1534 /* Let user choose if he wants to write memory or not. */
1535 if (!query (_("Because GDB is in replay mode, writing to memory "
1536 "will make the execution log unusable from this "
1537 "point onward. Write memory at address %s?"),
1538 paddress (target_gdbarch (), offset)))
1539 error (_("Process record canceled the operation."));
1541 /* Destroy the record from here forward. */
1542 record_full_list_release_following (record_full_list);
1545 /* Check record_full_insn_num */
1546 record_full_check_insn_num (0);
1548 /* Record registers change to list as an instruction. */
1549 record_full_arch_list_head = NULL;
1550 record_full_arch_list_tail = NULL;
1551 if (record_full_arch_list_add_mem (offset, len))
1553 record_full_list_release (record_full_arch_list_tail);
1555 fprintf_unfiltered (gdb_stdlog,
1556 "Process record: failed to record "
1558 return TARGET_XFER_E_IO;
1560 if (record_full_arch_list_add_end ())
1562 record_full_list_release (record_full_arch_list_tail);
1564 fprintf_unfiltered (gdb_stdlog,
1565 "Process record: failed to record "
1567 return TARGET_XFER_E_IO;
1569 record_full_list->next = record_full_arch_list_head;
1570 record_full_arch_list_head->prev = record_full_list;
1571 record_full_list = record_full_arch_list_tail;
1573 if (record_full_insn_num == record_full_insn_max_num)
1574 record_full_list_release_first ();
1576 record_full_insn_num++;
1579 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1580 readbuf, writebuf, offset,
1584 /* This structure represents a breakpoint inserted while the record
1585 target is active. We use this to know when to install/remove
1586 breakpoints in/from the target beneath. For example, a breakpoint
1587 may be inserted while recording, but removed when not replaying nor
1588 recording. In that case, the breakpoint had not been inserted on
1589 the target beneath, so we should not try to remove it there. */
1591 struct record_full_breakpoint
1593 /* The address and address space the breakpoint was set at. */
1594 struct address_space *address_space;
1597 /* True when the breakpoint has been also installed in the target
1598 beneath. This will be false for breakpoints set during replay or
1600 int in_target_beneath;
1603 typedef struct record_full_breakpoint *record_full_breakpoint_p;
1604 DEF_VEC_P(record_full_breakpoint_p);
1606 /* The list of breakpoints inserted while the record target is
1608 VEC(record_full_breakpoint_p) *record_full_breakpoints = NULL;
1611 record_full_sync_record_breakpoints (struct bp_location *loc, void *data)
1613 if (loc->loc_type != bp_loc_software_breakpoint)
1618 struct record_full_breakpoint *bp = XNEW (struct record_full_breakpoint);
1620 bp->addr = loc->target_info.placed_address;
1621 bp->address_space = loc->target_info.placed_address_space;
1623 bp->in_target_beneath = 1;
1625 VEC_safe_push (record_full_breakpoint_p, record_full_breakpoints, bp);
1629 /* Sync existing breakpoints to record_full_breakpoints. */
1632 record_full_init_record_breakpoints (void)
1634 VEC_free (record_full_breakpoint_p, record_full_breakpoints);
1636 iterate_over_bp_locations (record_full_sync_record_breakpoints);
1639 /* Behavior is conditional on RECORD_FULL_IS_REPLAY. We will not actually
1640 insert or remove breakpoints in the real target when replaying, nor
1644 record_full_insert_breakpoint (struct target_ops *ops,
1645 struct gdbarch *gdbarch,
1646 struct bp_target_info *bp_tgt)
1648 struct record_full_breakpoint *bp;
1649 int in_target_beneath = 0;
1651 if (!RECORD_FULL_IS_REPLAY)
1653 /* When recording, we currently always single-step, so we don't
1654 really need to install regular breakpoints in the inferior.
1655 However, we do have to insert software single-step
1656 breakpoints, in case the target can't hardware step. To keep
1657 things single, we always insert. */
1658 struct cleanup *old_cleanups;
1661 old_cleanups = record_full_gdb_operation_disable_set ();
1662 ret = ops->beneath->to_insert_breakpoint (ops->beneath, gdbarch, bp_tgt);
1663 do_cleanups (old_cleanups);
1668 in_target_beneath = 1;
1671 bp = XNEW (struct record_full_breakpoint);
1672 bp->addr = bp_tgt->placed_address;
1673 bp->address_space = bp_tgt->placed_address_space;
1674 bp->in_target_beneath = in_target_beneath;
1675 VEC_safe_push (record_full_breakpoint_p, record_full_breakpoints, bp);
1679 /* "to_remove_breakpoint" method for process record target. */
1682 record_full_remove_breakpoint (struct target_ops *ops,
1683 struct gdbarch *gdbarch,
1684 struct bp_target_info *bp_tgt)
1686 struct record_full_breakpoint *bp;
1690 VEC_iterate (record_full_breakpoint_p,
1691 record_full_breakpoints, ix, bp);
1694 if (bp->addr == bp_tgt->placed_address
1695 && bp->address_space == bp_tgt->placed_address_space)
1697 if (bp->in_target_beneath)
1699 struct cleanup *old_cleanups;
1702 old_cleanups = record_full_gdb_operation_disable_set ();
1703 ret = ops->beneath->to_remove_breakpoint (ops->beneath, gdbarch,
1705 do_cleanups (old_cleanups);
1711 VEC_unordered_remove (record_full_breakpoint_p,
1712 record_full_breakpoints, ix);
1717 gdb_assert_not_reached ("removing unknown breakpoint");
1720 /* "to_can_execute_reverse" method for process record target. */
1723 record_full_can_execute_reverse (struct target_ops *self)
1728 /* "to_get_bookmark" method for process record and prec over core. */
1731 record_full_get_bookmark (struct target_ops *self, const char *args,
1736 /* Return stringified form of instruction count. */
1737 if (record_full_list && record_full_list->type == record_full_end)
1738 ret = xstrdup (pulongest (record_full_list->u.end.insn_num));
1743 fprintf_unfiltered (gdb_stdlog,
1744 "record_full_get_bookmark returns %s\n", ret);
1746 fprintf_unfiltered (gdb_stdlog,
1747 "record_full_get_bookmark returns NULL\n");
1749 return (gdb_byte *) ret;
1752 /* "to_goto_bookmark" method for process record and prec over core. */
1755 record_full_goto_bookmark (struct target_ops *self,
1756 const gdb_byte *raw_bookmark, int from_tty)
1758 const char *bookmark = (const char *) raw_bookmark;
1759 struct cleanup *cleanup = make_cleanup (null_cleanup, NULL);
1762 fprintf_unfiltered (gdb_stdlog,
1763 "record_full_goto_bookmark receives %s\n", bookmark);
1765 if (bookmark[0] == '\'' || bookmark[0] == '\"')
1769 if (bookmark[strlen (bookmark) - 1] != bookmark[0])
1770 error (_("Unbalanced quotes: %s"), bookmark);
1773 copy = savestring (bookmark + 1, strlen (bookmark) - 2);
1774 make_cleanup (xfree, copy);
1778 record_goto (bookmark);
1780 do_cleanups (cleanup);
1783 static enum exec_direction_kind
1784 record_full_execution_direction (struct target_ops *self)
1786 return record_full_execution_dir;
1790 record_full_info (struct target_ops *self)
1792 struct record_full_entry *p;
1794 if (RECORD_FULL_IS_REPLAY)
1795 printf_filtered (_("Replay mode:\n"));
1797 printf_filtered (_("Record mode:\n"));
1799 /* Find entry for first actual instruction in the log. */
1800 for (p = record_full_first.next;
1801 p != NULL && p->type != record_full_end;
1805 /* Do we have a log at all? */
1806 if (p != NULL && p->type == record_full_end)
1808 /* Display instruction number for first instruction in the log. */
1809 printf_filtered (_("Lowest recorded instruction number is %s.\n"),
1810 pulongest (p->u.end.insn_num));
1812 /* If in replay mode, display where we are in the log. */
1813 if (RECORD_FULL_IS_REPLAY)
1814 printf_filtered (_("Current instruction number is %s.\n"),
1815 pulongest (record_full_list->u.end.insn_num));
1817 /* Display instruction number for last instruction in the log. */
1818 printf_filtered (_("Highest recorded instruction number is %s.\n"),
1819 pulongest (record_full_insn_count));
1821 /* Display log count. */
1822 printf_filtered (_("Log contains %u instructions.\n"),
1823 record_full_insn_num);
1826 printf_filtered (_("No instructions have been logged.\n"));
1828 /* Display max log size. */
1829 printf_filtered (_("Max logged instructions is %u.\n"),
1830 record_full_insn_max_num);
1833 /* The "to_record_delete" target method. */
1836 record_full_delete (struct target_ops *self)
1838 record_full_list_release_following (record_full_list);
1841 /* The "to_record_is_replaying" target method. */
1844 record_full_is_replaying (struct target_ops *self, ptid_t ptid)
1846 return RECORD_FULL_IS_REPLAY;
1849 /* The "to_record_will_replay" target method. */
1852 record_full_will_replay (struct target_ops *self, ptid_t ptid, int dir)
1854 /* We can currently only record when executing forwards. Should we be able
1855 to record when executing backwards on targets that support reverse
1856 execution, this needs to be changed. */
1858 return RECORD_FULL_IS_REPLAY || dir == EXEC_REVERSE;
1861 /* Go to a specific entry. */
1864 record_full_goto_entry (struct record_full_entry *p)
1867 error (_("Target insn not found."));
1868 else if (p == record_full_list)
1869 error (_("Already at target insn."));
1870 else if (p->u.end.insn_num > record_full_list->u.end.insn_num)
1872 printf_filtered (_("Go forward to insn number %s\n"),
1873 pulongest (p->u.end.insn_num));
1874 record_full_goto_insn (p, EXEC_FORWARD);
1878 printf_filtered (_("Go backward to insn number %s\n"),
1879 pulongest (p->u.end.insn_num));
1880 record_full_goto_insn (p, EXEC_REVERSE);
1883 registers_changed ();
1884 reinit_frame_cache ();
1885 stop_pc = regcache_read_pc (get_current_regcache ());
1886 print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1);
1889 /* The "to_goto_record_begin" target method. */
1892 record_full_goto_begin (struct target_ops *self)
1894 struct record_full_entry *p = NULL;
1896 for (p = &record_full_first; p != NULL; p = p->next)
1897 if (p->type == record_full_end)
1900 record_full_goto_entry (p);
1903 /* The "to_goto_record_end" target method. */
1906 record_full_goto_end (struct target_ops *self)
1908 struct record_full_entry *p = NULL;
1910 for (p = record_full_list; p->next != NULL; p = p->next)
1912 for (; p!= NULL; p = p->prev)
1913 if (p->type == record_full_end)
1916 record_full_goto_entry (p);
1919 /* The "to_goto_record" target method. */
1922 record_full_goto (struct target_ops *self, ULONGEST target_insn)
1924 struct record_full_entry *p = NULL;
1926 for (p = &record_full_first; p != NULL; p = p->next)
1927 if (p->type == record_full_end && p->u.end.insn_num == target_insn)
1930 record_full_goto_entry (p);
1933 /* The "to_record_stop_replaying" target method. */
1936 record_full_stop_replaying (struct target_ops *self)
1938 record_full_goto_end (self);
1942 init_record_full_ops (void)
1944 record_full_ops.to_shortname = "record-full";
1945 record_full_ops.to_longname = "Process record and replay target";
1946 record_full_ops.to_doc =
1947 "Log program while executing and replay execution from log.";
1948 record_full_ops.to_open = record_full_open;
1949 record_full_ops.to_close = record_full_close;
1950 record_full_ops.to_async = record_full_async;
1951 record_full_ops.to_resume = record_full_resume;
1952 record_full_ops.to_wait = record_full_wait;
1953 record_full_ops.to_disconnect = record_disconnect;
1954 record_full_ops.to_detach = record_detach;
1955 record_full_ops.to_mourn_inferior = record_mourn_inferior;
1956 record_full_ops.to_kill = record_kill;
1957 record_full_ops.to_store_registers = record_full_store_registers;
1958 record_full_ops.to_xfer_partial = record_full_xfer_partial;
1959 record_full_ops.to_insert_breakpoint = record_full_insert_breakpoint;
1960 record_full_ops.to_remove_breakpoint = record_full_remove_breakpoint;
1961 record_full_ops.to_stopped_by_watchpoint = record_full_stopped_by_watchpoint;
1962 record_full_ops.to_stopped_data_address = record_full_stopped_data_address;
1963 record_full_ops.to_stopped_by_sw_breakpoint
1964 = record_full_stopped_by_sw_breakpoint;
1965 record_full_ops.to_supports_stopped_by_sw_breakpoint
1966 = record_full_supports_stopped_by_sw_breakpoint;
1967 record_full_ops.to_stopped_by_hw_breakpoint
1968 = record_full_stopped_by_hw_breakpoint;
1969 record_full_ops.to_supports_stopped_by_hw_breakpoint
1970 = record_full_supports_stopped_by_hw_breakpoint;
1971 record_full_ops.to_can_execute_reverse = record_full_can_execute_reverse;
1972 record_full_ops.to_stratum = record_stratum;
1973 /* Add bookmark target methods. */
1974 record_full_ops.to_get_bookmark = record_full_get_bookmark;
1975 record_full_ops.to_goto_bookmark = record_full_goto_bookmark;
1976 record_full_ops.to_execution_direction = record_full_execution_direction;
1977 record_full_ops.to_info_record = record_full_info;
1978 record_full_ops.to_save_record = record_full_save;
1979 record_full_ops.to_delete_record = record_full_delete;
1980 record_full_ops.to_record_is_replaying = record_full_is_replaying;
1981 record_full_ops.to_record_will_replay = record_full_will_replay;
1982 record_full_ops.to_record_stop_replaying = record_full_stop_replaying;
1983 record_full_ops.to_goto_record_begin = record_full_goto_begin;
1984 record_full_ops.to_goto_record_end = record_full_goto_end;
1985 record_full_ops.to_goto_record = record_full_goto;
1986 record_full_ops.to_magic = OPS_MAGIC;
1989 /* "to_resume" method for prec over corefile. */
1992 record_full_core_resume (struct target_ops *ops, ptid_t ptid, int step,
1993 enum gdb_signal signal)
1995 record_full_resume_step = step;
1996 record_full_resumed = 1;
1997 record_full_execution_dir = execution_direction;
1999 /* We are about to start executing the inferior (or simulate it),
2000 let's register it with the event loop. */
2001 if (target_can_async_p ())
2005 /* "to_kill" method for prec over corefile. */
2008 record_full_core_kill (struct target_ops *ops)
2011 fprintf_unfiltered (gdb_stdlog, "Process record: record_full_core_kill\n");
2013 unpush_target (&record_full_core_ops);
2016 /* "to_fetch_registers" method for prec over corefile. */
2019 record_full_core_fetch_registers (struct target_ops *ops,
2020 struct regcache *regcache,
2025 int num = gdbarch_num_regs (get_regcache_arch (regcache));
2028 for (i = 0; i < num; i ++)
2029 regcache_raw_supply (regcache, i,
2030 record_full_core_regbuf + MAX_REGISTER_SIZE * i);
2033 regcache_raw_supply (regcache, regno,
2034 record_full_core_regbuf + MAX_REGISTER_SIZE * regno);
2037 /* "to_prepare_to_store" method for prec over corefile. */
2040 record_full_core_prepare_to_store (struct target_ops *self,
2041 struct regcache *regcache)
2045 /* "to_store_registers" method for prec over corefile. */
2048 record_full_core_store_registers (struct target_ops *ops,
2049 struct regcache *regcache,
2052 if (record_full_gdb_operation_disable)
2053 regcache_raw_collect (regcache, regno,
2054 record_full_core_regbuf + MAX_REGISTER_SIZE * regno);
2056 error (_("You can't do that without a process to debug."));
2059 /* "to_xfer_partial" method for prec over corefile. */
2061 static enum target_xfer_status
2062 record_full_core_xfer_partial (struct target_ops *ops,
2063 enum target_object object,
2064 const char *annex, gdb_byte *readbuf,
2065 const gdb_byte *writebuf, ULONGEST offset,
2066 ULONGEST len, ULONGEST *xfered_len)
2068 if (object == TARGET_OBJECT_MEMORY)
2070 if (record_full_gdb_operation_disable || !writebuf)
2072 struct target_section *p;
2074 for (p = record_full_core_start; p < record_full_core_end; p++)
2076 if (offset >= p->addr)
2078 struct record_full_core_buf_entry *entry;
2079 ULONGEST sec_offset;
2081 if (offset >= p->endaddr)
2084 if (offset + len > p->endaddr)
2085 len = p->endaddr - offset;
2087 sec_offset = offset - p->addr;
2089 /* Read readbuf or write writebuf p, offset, len. */
2091 if (p->the_bfd_section->flags & SEC_CONSTRUCTOR
2092 || (p->the_bfd_section->flags & SEC_HAS_CONTENTS) == 0)
2095 memset (readbuf, 0, len);
2098 return TARGET_XFER_OK;
2100 /* Get record_full_core_buf_entry. */
2101 for (entry = record_full_core_buf_list; entry;
2102 entry = entry->prev)
2109 /* Add a new entry. */
2110 entry = XNEW (struct record_full_core_buf_entry);
2112 if (!bfd_malloc_and_get_section
2113 (p->the_bfd_section->owner,
2118 return TARGET_XFER_EOF;
2120 entry->prev = record_full_core_buf_list;
2121 record_full_core_buf_list = entry;
2124 memcpy (entry->buf + sec_offset, writebuf,
2130 return ops->beneath->to_xfer_partial (ops->beneath,
2136 memcpy (readbuf, entry->buf + sec_offset,
2141 return TARGET_XFER_OK;
2145 return TARGET_XFER_E_IO;
2148 error (_("You can't do that without a process to debug."));
2151 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
2152 readbuf, writebuf, offset, len,
2156 /* "to_insert_breakpoint" method for prec over corefile. */
2159 record_full_core_insert_breakpoint (struct target_ops *ops,
2160 struct gdbarch *gdbarch,
2161 struct bp_target_info *bp_tgt)
2166 /* "to_remove_breakpoint" method for prec over corefile. */
2169 record_full_core_remove_breakpoint (struct target_ops *ops,
2170 struct gdbarch *gdbarch,
2171 struct bp_target_info *bp_tgt)
2176 /* "to_has_execution" method for prec over corefile. */
2179 record_full_core_has_execution (struct target_ops *ops, ptid_t the_ptid)
2185 init_record_full_core_ops (void)
2187 record_full_core_ops.to_shortname = "record-core";
2188 record_full_core_ops.to_longname = "Process record and replay target";
2189 record_full_core_ops.to_doc =
2190 "Log program while executing and replay execution from log.";
2191 record_full_core_ops.to_open = record_full_open;
2192 record_full_core_ops.to_close = record_full_close;
2193 record_full_core_ops.to_async = record_full_async;
2194 record_full_core_ops.to_resume = record_full_core_resume;
2195 record_full_core_ops.to_wait = record_full_wait;
2196 record_full_core_ops.to_kill = record_full_core_kill;
2197 record_full_core_ops.to_fetch_registers = record_full_core_fetch_registers;
2198 record_full_core_ops.to_prepare_to_store = record_full_core_prepare_to_store;
2199 record_full_core_ops.to_store_registers = record_full_core_store_registers;
2200 record_full_core_ops.to_xfer_partial = record_full_core_xfer_partial;
2201 record_full_core_ops.to_insert_breakpoint
2202 = record_full_core_insert_breakpoint;
2203 record_full_core_ops.to_remove_breakpoint
2204 = record_full_core_remove_breakpoint;
2205 record_full_core_ops.to_stopped_by_watchpoint
2206 = record_full_stopped_by_watchpoint;
2207 record_full_core_ops.to_stopped_data_address
2208 = record_full_stopped_data_address;
2209 record_full_core_ops.to_stopped_by_sw_breakpoint
2210 = record_full_stopped_by_sw_breakpoint;
2211 record_full_core_ops.to_supports_stopped_by_sw_breakpoint
2212 = record_full_supports_stopped_by_sw_breakpoint;
2213 record_full_core_ops.to_stopped_by_hw_breakpoint
2214 = record_full_stopped_by_hw_breakpoint;
2215 record_full_core_ops.to_supports_stopped_by_hw_breakpoint
2216 = record_full_supports_stopped_by_hw_breakpoint;
2217 record_full_core_ops.to_can_execute_reverse
2218 = record_full_can_execute_reverse;
2219 record_full_core_ops.to_has_execution = record_full_core_has_execution;
2220 record_full_core_ops.to_stratum = record_stratum;
2221 /* Add bookmark target methods. */
2222 record_full_core_ops.to_get_bookmark = record_full_get_bookmark;
2223 record_full_core_ops.to_goto_bookmark = record_full_goto_bookmark;
2224 record_full_core_ops.to_execution_direction
2225 = record_full_execution_direction;
2226 record_full_core_ops.to_info_record = record_full_info;
2227 record_full_core_ops.to_delete_record = record_full_delete;
2228 record_full_core_ops.to_record_is_replaying = record_full_is_replaying;
2229 record_full_core_ops.to_record_will_replay = record_full_will_replay;
2230 record_full_core_ops.to_goto_record_begin = record_full_goto_begin;
2231 record_full_core_ops.to_goto_record_end = record_full_goto_end;
2232 record_full_core_ops.to_goto_record = record_full_goto;
2233 record_full_core_ops.to_magic = OPS_MAGIC;
2236 /* Record log save-file format
2237 Version 1 (never released)
2240 4 bytes: magic number htonl(0x20090829).
2241 NOTE: be sure to change whenever this file format changes!
2245 1 byte: record type (record_full_end, see enum record_full_type).
2247 1 byte: record type (record_full_reg, see enum record_full_type).
2248 8 bytes: register id (network byte order).
2249 MAX_REGISTER_SIZE bytes: register value.
2251 1 byte: record type (record_full_mem, see enum record_full_type).
2252 8 bytes: memory length (network byte order).
2253 8 bytes: memory address (network byte order).
2254 n bytes: memory value (n == memory length).
2257 4 bytes: magic number netorder32(0x20091016).
2258 NOTE: be sure to change whenever this file format changes!
2262 1 byte: record type (record_full_end, see enum record_full_type).
2264 4 bytes: instruction count
2266 1 byte: record type (record_full_reg, see enum record_full_type).
2267 4 bytes: register id (network byte order).
2268 n bytes: register value (n == actual register size).
2269 (eg. 4 bytes for x86 general registers).
2271 1 byte: record type (record_full_mem, see enum record_full_type).
2272 4 bytes: memory length (network byte order).
2273 8 bytes: memory address (network byte order).
2274 n bytes: memory value (n == memory length).
2278 /* bfdcore_read -- read bytes from a core file section. */
2281 bfdcore_read (bfd *obfd, asection *osec, void *buf, int len, int *offset)
2283 int ret = bfd_get_section_contents (obfd, osec, buf, *offset, len);
2288 error (_("Failed to read %d bytes from core file %s ('%s')."),
2289 len, bfd_get_filename (obfd),
2290 bfd_errmsg (bfd_get_error ()));
2293 static inline uint64_t
2294 netorder64 (uint64_t input)
2298 store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret),
2299 BFD_ENDIAN_BIG, input);
2303 static inline uint32_t
2304 netorder32 (uint32_t input)
2308 store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret),
2309 BFD_ENDIAN_BIG, input);
2313 static inline uint16_t
2314 netorder16 (uint16_t input)
2318 store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret),
2319 BFD_ENDIAN_BIG, input);
2323 /* Restore the execution log from a core_bfd file. */
2325 record_full_restore (void)
2328 struct cleanup *old_cleanups;
2329 struct record_full_entry *rec;
2333 struct regcache *regcache;
2335 /* We restore the execution log from the open core bfd,
2337 if (core_bfd == NULL)
2340 /* "record_full_restore" can only be called when record list is empty. */
2341 gdb_assert (record_full_first.next == NULL);
2344 fprintf_unfiltered (gdb_stdlog, "Restoring recording from core file.\n");
2346 /* Now need to find our special note section. */
2347 osec = bfd_get_section_by_name (core_bfd, "null0");
2349 fprintf_unfiltered (gdb_stdlog, "Find precord section %s.\n",
2350 osec ? "succeeded" : "failed");
2353 osec_size = bfd_section_size (core_bfd, osec);
2355 fprintf_unfiltered (gdb_stdlog, "%s", bfd_section_name (core_bfd, osec));
2357 /* Check the magic code. */
2358 bfdcore_read (core_bfd, osec, &magic, sizeof (magic), &bfd_offset);
2359 if (magic != RECORD_FULL_FILE_MAGIC)
2360 error (_("Version mis-match or file format error in core file %s."),
2361 bfd_get_filename (core_bfd));
2363 fprintf_unfiltered (gdb_stdlog,
2364 " Reading 4-byte magic cookie "
2365 "RECORD_FULL_FILE_MAGIC (0x%s)\n",
2366 phex_nz (netorder32 (magic), 4));
2368 /* Restore the entries in recfd into record_full_arch_list_head and
2369 record_full_arch_list_tail. */
2370 record_full_arch_list_head = NULL;
2371 record_full_arch_list_tail = NULL;
2372 record_full_insn_num = 0;
2373 old_cleanups = make_cleanup (record_full_arch_list_cleanups, 0);
2374 regcache = get_current_regcache ();
2379 uint32_t regnum, len, signal, count;
2382 /* We are finished when offset reaches osec_size. */
2383 if (bfd_offset >= osec_size)
2385 bfdcore_read (core_bfd, osec, &rectype, sizeof (rectype), &bfd_offset);
2389 case record_full_reg: /* reg */
2390 /* Get register number to regnum. */
2391 bfdcore_read (core_bfd, osec, ®num,
2392 sizeof (regnum), &bfd_offset);
2393 regnum = netorder32 (regnum);
2395 rec = record_full_reg_alloc (regcache, regnum);
2398 bfdcore_read (core_bfd, osec, record_full_get_loc (rec),
2399 rec->u.reg.len, &bfd_offset);
2402 fprintf_unfiltered (gdb_stdlog,
2403 " Reading register %d (1 "
2404 "plus %lu plus %d bytes)\n",
2406 (unsigned long) sizeof (regnum),
2410 case record_full_mem: /* mem */
2412 bfdcore_read (core_bfd, osec, &len,
2413 sizeof (len), &bfd_offset);
2414 len = netorder32 (len);
2417 bfdcore_read (core_bfd, osec, &addr,
2418 sizeof (addr), &bfd_offset);
2419 addr = netorder64 (addr);
2421 rec = record_full_mem_alloc (addr, len);
2424 bfdcore_read (core_bfd, osec, record_full_get_loc (rec),
2425 rec->u.mem.len, &bfd_offset);
2428 fprintf_unfiltered (gdb_stdlog,
2429 " Reading memory %s (1 plus "
2430 "%lu plus %lu plus %d bytes)\n",
2431 paddress (get_current_arch (),
2433 (unsigned long) sizeof (addr),
2434 (unsigned long) sizeof (len),
2438 case record_full_end: /* end */
2439 rec = record_full_end_alloc ();
2440 record_full_insn_num ++;
2442 /* Get signal value. */
2443 bfdcore_read (core_bfd, osec, &signal,
2444 sizeof (signal), &bfd_offset);
2445 signal = netorder32 (signal);
2446 rec->u.end.sigval = (enum gdb_signal) signal;
2448 /* Get insn count. */
2449 bfdcore_read (core_bfd, osec, &count,
2450 sizeof (count), &bfd_offset);
2451 count = netorder32 (count);
2452 rec->u.end.insn_num = count;
2453 record_full_insn_count = count + 1;
2455 fprintf_unfiltered (gdb_stdlog,
2456 " Reading record_full_end (1 + "
2457 "%lu + %lu bytes), offset == %s\n",
2458 (unsigned long) sizeof (signal),
2459 (unsigned long) sizeof (count),
2460 paddress (get_current_arch (),
2465 error (_("Bad entry type in core file %s."),
2466 bfd_get_filename (core_bfd));
2470 /* Add rec to record arch list. */
2471 record_full_arch_list_add (rec);
2474 discard_cleanups (old_cleanups);
2476 /* Add record_full_arch_list_head to the end of record list. */
2477 record_full_first.next = record_full_arch_list_head;
2478 record_full_arch_list_head->prev = &record_full_first;
2479 record_full_arch_list_tail->next = NULL;
2480 record_full_list = &record_full_first;
2482 /* Update record_full_insn_max_num. */
2483 if (record_full_insn_num > record_full_insn_max_num)
2485 record_full_insn_max_num = record_full_insn_num;
2486 warning (_("Auto increase record/replay buffer limit to %u."),
2487 record_full_insn_max_num);
2491 printf_filtered (_("Restored records from core file %s.\n"),
2492 bfd_get_filename (core_bfd));
2494 print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1);
2497 /* bfdcore_write -- write bytes into a core file section. */
2500 bfdcore_write (bfd *obfd, asection *osec, void *buf, int len, int *offset)
2502 int ret = bfd_set_section_contents (obfd, osec, buf, *offset, len);
2507 error (_("Failed to write %d bytes to core file %s ('%s')."),
2508 len, bfd_get_filename (obfd),
2509 bfd_errmsg (bfd_get_error ()));
2512 /* Restore the execution log from a file. We use a modified elf
2513 corefile format, with an extra section for our data. */
2516 cmd_record_full_restore (char *args, int from_tty)
2518 core_file_command (args, from_tty);
2519 record_full_open (args, from_tty);
2523 record_full_save_cleanups (void *data)
2525 bfd *obfd = (bfd *) data;
2526 char *pathname = xstrdup (bfd_get_filename (obfd));
2528 gdb_bfd_unref (obfd);
2533 /* Save the execution log to a file. We use a modified elf corefile
2534 format, with an extra section for our data. */
2537 record_full_save (struct target_ops *self, const char *recfilename)
2539 struct record_full_entry *cur_record_full_list;
2541 struct regcache *regcache;
2542 struct gdbarch *gdbarch;
2543 struct cleanup *old_cleanups;
2544 struct cleanup *set_cleanups;
2547 asection *osec = NULL;
2550 /* Open the save file. */
2552 fprintf_unfiltered (gdb_stdlog, "Saving execution log to core file '%s'\n",
2555 /* Open the output file. */
2556 obfd = create_gcore_bfd (recfilename);
2557 old_cleanups = make_cleanup (record_full_save_cleanups, obfd);
2559 /* Save the current record entry to "cur_record_full_list". */
2560 cur_record_full_list = record_full_list;
2562 /* Get the values of regcache and gdbarch. */
2563 regcache = get_current_regcache ();
2564 gdbarch = get_regcache_arch (regcache);
2566 /* Disable the GDB operation record. */
2567 set_cleanups = record_full_gdb_operation_disable_set ();
2569 /* Reverse execute to the begin of record list. */
2572 /* Check for beginning and end of log. */
2573 if (record_full_list == &record_full_first)
2576 record_full_exec_insn (regcache, gdbarch, record_full_list);
2578 if (record_full_list->prev)
2579 record_full_list = record_full_list->prev;
2582 /* Compute the size needed for the extra bfd section. */
2583 save_size = 4; /* magic cookie */
2584 for (record_full_list = record_full_first.next; record_full_list;
2585 record_full_list = record_full_list->next)
2586 switch (record_full_list->type)
2588 case record_full_end:
2589 save_size += 1 + 4 + 4;
2591 case record_full_reg:
2592 save_size += 1 + 4 + record_full_list->u.reg.len;
2594 case record_full_mem:
2595 save_size += 1 + 4 + 8 + record_full_list->u.mem.len;
2599 /* Make the new bfd section. */
2600 osec = bfd_make_section_anyway_with_flags (obfd, "precord",
2604 error (_("Failed to create 'precord' section for corefile %s: %s"),
2606 bfd_errmsg (bfd_get_error ()));
2607 bfd_set_section_size (obfd, osec, save_size);
2608 bfd_set_section_vma (obfd, osec, 0);
2609 bfd_set_section_alignment (obfd, osec, 0);
2610 bfd_section_lma (obfd, osec) = 0;
2612 /* Save corefile state. */
2613 write_gcore_file (obfd);
2615 /* Write out the record log. */
2616 /* Write the magic code. */
2617 magic = RECORD_FULL_FILE_MAGIC;
2619 fprintf_unfiltered (gdb_stdlog,
2620 " Writing 4-byte magic cookie "
2621 "RECORD_FULL_FILE_MAGIC (0x%s)\n",
2622 phex_nz (magic, 4));
2623 bfdcore_write (obfd, osec, &magic, sizeof (magic), &bfd_offset);
2625 /* Save the entries to recfd and forward execute to the end of
2627 record_full_list = &record_full_first;
2631 if (record_full_list != &record_full_first)
2634 uint32_t regnum, len, signal, count;
2637 type = record_full_list->type;
2638 bfdcore_write (obfd, osec, &type, sizeof (type), &bfd_offset);
2640 switch (record_full_list->type)
2642 case record_full_reg: /* reg */
2644 fprintf_unfiltered (gdb_stdlog,
2645 " Writing register %d (1 "
2646 "plus %lu plus %d bytes)\n",
2647 record_full_list->u.reg.num,
2648 (unsigned long) sizeof (regnum),
2649 record_full_list->u.reg.len);
2652 regnum = netorder32 (record_full_list->u.reg.num);
2653 bfdcore_write (obfd, osec, ®num,
2654 sizeof (regnum), &bfd_offset);
2657 bfdcore_write (obfd, osec,
2658 record_full_get_loc (record_full_list),
2659 record_full_list->u.reg.len, &bfd_offset);
2662 case record_full_mem: /* mem */
2664 fprintf_unfiltered (gdb_stdlog,
2665 " Writing memory %s (1 plus "
2666 "%lu plus %lu plus %d bytes)\n",
2668 record_full_list->u.mem.addr),
2669 (unsigned long) sizeof (addr),
2670 (unsigned long) sizeof (len),
2671 record_full_list->u.mem.len);
2674 len = netorder32 (record_full_list->u.mem.len);
2675 bfdcore_write (obfd, osec, &len, sizeof (len), &bfd_offset);
2677 /* Write memaddr. */
2678 addr = netorder64 (record_full_list->u.mem.addr);
2679 bfdcore_write (obfd, osec, &addr,
2680 sizeof (addr), &bfd_offset);
2683 bfdcore_write (obfd, osec,
2684 record_full_get_loc (record_full_list),
2685 record_full_list->u.mem.len, &bfd_offset);
2688 case record_full_end:
2690 fprintf_unfiltered (gdb_stdlog,
2691 " Writing record_full_end (1 + "
2692 "%lu + %lu bytes)\n",
2693 (unsigned long) sizeof (signal),
2694 (unsigned long) sizeof (count));
2695 /* Write signal value. */
2696 signal = netorder32 (record_full_list->u.end.sigval);
2697 bfdcore_write (obfd, osec, &signal,
2698 sizeof (signal), &bfd_offset);
2700 /* Write insn count. */
2701 count = netorder32 (record_full_list->u.end.insn_num);
2702 bfdcore_write (obfd, osec, &count,
2703 sizeof (count), &bfd_offset);
2708 /* Execute entry. */
2709 record_full_exec_insn (regcache, gdbarch, record_full_list);
2711 if (record_full_list->next)
2712 record_full_list = record_full_list->next;
2717 /* Reverse execute to cur_record_full_list. */
2720 /* Check for beginning and end of log. */
2721 if (record_full_list == cur_record_full_list)
2724 record_full_exec_insn (regcache, gdbarch, record_full_list);
2726 if (record_full_list->prev)
2727 record_full_list = record_full_list->prev;
2730 do_cleanups (set_cleanups);
2731 gdb_bfd_unref (obfd);
2732 discard_cleanups (old_cleanups);
2735 printf_filtered (_("Saved core file %s with execution log.\n"),
2739 /* record_full_goto_insn -- rewind the record log (forward or backward,
2740 depending on DIR) to the given entry, changing the program state
2744 record_full_goto_insn (struct record_full_entry *entry,
2745 enum exec_direction_kind dir)
2747 struct cleanup *set_cleanups = record_full_gdb_operation_disable_set ();
2748 struct regcache *regcache = get_current_regcache ();
2749 struct gdbarch *gdbarch = get_regcache_arch (regcache);
2751 /* Assume everything is valid: we will hit the entry,
2752 and we will not hit the end of the recording. */
2754 if (dir == EXEC_FORWARD)
2755 record_full_list = record_full_list->next;
2759 record_full_exec_insn (regcache, gdbarch, record_full_list);
2760 if (dir == EXEC_REVERSE)
2761 record_full_list = record_full_list->prev;
2763 record_full_list = record_full_list->next;
2764 } while (record_full_list != entry);
2765 do_cleanups (set_cleanups);
2768 /* Alias for "target record-full". */
2771 cmd_record_full_start (char *args, int from_tty)
2773 execute_command ("target record-full", from_tty);
2777 set_record_full_insn_max_num (char *args, int from_tty,
2778 struct cmd_list_element *c)
2780 if (record_full_insn_num > record_full_insn_max_num)
2782 /* Count down record_full_insn_num while releasing records from list. */
2783 while (record_full_insn_num > record_full_insn_max_num)
2785 record_full_list_release_first ();
2786 record_full_insn_num--;
2791 /* The "set record full" command. */
2794 set_record_full_command (char *args, int from_tty)
2796 printf_unfiltered (_("\"set record full\" must be followed "
2797 "by an apporpriate subcommand.\n"));
2798 help_list (set_record_full_cmdlist, "set record full ", all_commands,
2802 /* The "show record full" command. */
2805 show_record_full_command (char *args, int from_tty)
2807 cmd_show_list (show_record_full_cmdlist, from_tty, "");
2810 /* Provide a prototype to silence -Wmissing-prototypes. */
2811 extern initialize_file_ftype _initialize_record_full;
2814 _initialize_record_full (void)
2816 struct cmd_list_element *c;
2818 /* Init record_full_first. */
2819 record_full_first.prev = NULL;
2820 record_full_first.next = NULL;
2821 record_full_first.type = record_full_end;
2823 init_record_full_ops ();
2824 add_target (&record_full_ops);
2825 add_deprecated_target_alias (&record_full_ops, "record");
2826 init_record_full_core_ops ();
2827 add_target (&record_full_core_ops);
2829 add_prefix_cmd ("full", class_obscure, cmd_record_full_start,
2830 _("Start full execution recording."), &record_full_cmdlist,
2831 "record full ", 0, &record_cmdlist);
2833 c = add_cmd ("restore", class_obscure, cmd_record_full_restore,
2834 _("Restore the execution log from a file.\n\
2835 Argument is filename. File must be created with 'record save'."),
2836 &record_full_cmdlist);
2837 set_cmd_completer (c, filename_completer);
2839 /* Deprecate the old version without "full" prefix. */
2840 c = add_alias_cmd ("restore", "full restore", class_obscure, 1,
2842 set_cmd_completer (c, filename_completer);
2843 deprecate_cmd (c, "record full restore");
2845 add_prefix_cmd ("full", class_support, set_record_full_command,
2846 _("Set record options"), &set_record_full_cmdlist,
2847 "set record full ", 0, &set_record_cmdlist);
2849 add_prefix_cmd ("full", class_support, show_record_full_command,
2850 _("Show record options"), &show_record_full_cmdlist,
2851 "show record full ", 0, &show_record_cmdlist);
2853 /* Record instructions number limit command. */
2854 add_setshow_boolean_cmd ("stop-at-limit", no_class,
2855 &record_full_stop_at_limit, _("\
2856 Set whether record/replay stops when record/replay buffer becomes full."), _("\
2857 Show whether record/replay stops when record/replay buffer becomes full."),
2858 _("Default is ON.\n\
2859 When ON, if the record/replay buffer becomes full, ask user what to do.\n\
2860 When OFF, if the record/replay buffer becomes full,\n\
2861 delete the oldest recorded instruction to make room for each new one."),
2863 &set_record_full_cmdlist, &show_record_full_cmdlist);
2865 c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1,
2866 &set_record_cmdlist);
2867 deprecate_cmd (c, "set record full stop-at-limit");
2869 c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1,
2870 &show_record_cmdlist);
2871 deprecate_cmd (c, "show record full stop-at-limit");
2873 add_setshow_uinteger_cmd ("insn-number-max", no_class,
2874 &record_full_insn_max_num,
2875 _("Set record/replay buffer limit."),
2876 _("Show record/replay buffer limit."), _("\
2877 Set the maximum number of instructions to be stored in the\n\
2878 record/replay buffer. A value of either \"unlimited\" or zero means no\n\
2879 limit. Default is 200000."),
2880 set_record_full_insn_max_num,
2881 NULL, &set_record_full_cmdlist,
2882 &show_record_full_cmdlist);
2884 c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1,
2885 &set_record_cmdlist);
2886 deprecate_cmd (c, "set record full insn-number-max");
2888 c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1,
2889 &show_record_cmdlist);
2890 deprecate_cmd (c, "show record full insn-number-max");
2892 add_setshow_boolean_cmd ("memory-query", no_class,
2893 &record_full_memory_query, _("\
2894 Set whether query if PREC cannot record memory change of next instruction."),
2896 Show whether query if PREC cannot record memory change of next instruction."),
2899 When ON, query if PREC cannot record memory change of next instruction."),
2901 &set_record_full_cmdlist,
2902 &show_record_full_cmdlist);
2904 c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1,
2905 &set_record_cmdlist);
2906 deprecate_cmd (c, "set record full memory-query");
2908 c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1,
2909 &show_record_cmdlist);
2910 deprecate_cmd (c, "show record full memory-query");