1 /* Process record and replay target for GDB, the GNU debugger.
3 Copyright (C) 2008, 2009, 2010 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"
36 /* This module implements "target record", also known as "process
37 record and replay". This target sits on top of a "normal" target
38 (a target that "has execution"), and provides a record and replay
39 functionality, including reverse debugging.
41 Target record has two modes: recording, and replaying.
43 In record mode, we intercept the to_resume and to_wait methods.
44 Whenever gdb resumes the target, we run the target in single step
45 mode, and we build up an execution log in which, for each executed
46 instruction, we record all changes in memory and register state.
47 This is invisible to the user, to whom it just looks like an
48 ordinary debugging session (except for performance degredation).
50 In replay mode, instead of actually letting the inferior run as a
51 process, we simulate its execution by playing back the recorded
52 execution log. For each instruction in the log, we simulate the
53 instruction's side effects by duplicating the changes that it would
54 have made on memory and registers. */
56 #define DEFAULT_RECORD_INSN_MAX_NUM 200000
58 #define RECORD_IS_REPLAY \
59 (record_list->next || execution_direction == EXEC_REVERSE)
61 #define RECORD_FILE_MAGIC netorder32(0x20091016)
63 /* These are the core structs of the process record functionality.
65 A record_entry is a record of the value change of a register
66 ("record_reg") or a part of memory ("record_mem"). And each
67 instruction must have a struct record_entry ("record_end") that
68 indicates that this is the last struct record_entry of this
71 Each struct record_entry is linked to "record_list" by "prev" and
74 struct record_mem_entry
78 /* Set this flag if target memory for this entry
79 can no longer be accessed. */
80 int mem_entry_not_accessible
;
84 gdb_byte buf
[sizeof (gdb_byte
*)];
88 struct record_reg_entry
95 gdb_byte buf
[2 * sizeof (gdb_byte
*)];
99 struct record_end_entry
101 enum target_signal sigval
;
112 /* This is the data structure that makes up the execution log.
114 The execution log consists of a single linked list of entries
115 of type "struct record_entry". It is doubly linked so that it
116 can be traversed in either direction.
118 The start of the list is anchored by a struct called
119 "record_first". The pointer "record_list" either points to the
120 last entry that was added to the list (in record mode), or to the
121 next entry in the list that will be executed (in replay mode).
123 Each list element (struct record_entry), in addition to next and
124 prev pointers, consists of a union of three entry types: mem, reg,
125 and end. A field called "type" determines which entry type is
126 represented by a given list element.
128 Each instruction that is added to the execution log is represented
129 by a variable number of list elements ('entries'). The instruction
130 will have one "reg" entry for each register that is changed by
131 executing the instruction (including the PC in every case). It
132 will also have one "mem" entry for each memory change. Finally,
133 each instruction will have an "end" entry that separates it from
134 the changes associated with the next instruction. */
138 struct record_entry
*prev
;
139 struct record_entry
*next
;
140 enum record_type type
;
144 struct record_reg_entry reg
;
146 struct record_mem_entry mem
;
148 struct record_end_entry end
;
152 /* This is the debug switch for process record. */
153 int record_debug
= 0;
155 struct record_core_buf_entry
157 struct record_core_buf_entry
*prev
;
158 struct target_section
*p
;
162 /* Record buf with core target. */
163 static gdb_byte
*record_core_regbuf
= NULL
;
164 static struct target_section
*record_core_start
;
165 static struct target_section
*record_core_end
;
166 static struct record_core_buf_entry
*record_core_buf_list
= NULL
;
168 /* The following variables are used for managing the linked list that
169 represents the execution log.
171 record_first is the anchor that holds down the beginning of the list.
173 record_list serves two functions:
174 1) In record mode, it anchors the end of the list.
175 2) In replay mode, it traverses the list and points to
176 the next instruction that must be emulated.
178 record_arch_list_head and record_arch_list_tail are used to manage
179 a separate list, which is used to build up the change elements of
180 the currently executing instruction during record mode. When this
181 instruction has been completely annotated in the "arch list", it
182 will be appended to the main execution log. */
184 static struct record_entry record_first
;
185 static struct record_entry
*record_list
= &record_first
;
186 static struct record_entry
*record_arch_list_head
= NULL
;
187 static struct record_entry
*record_arch_list_tail
= NULL
;
189 /* 1 ask user. 0 auto delete the last struct record_entry. */
190 static int record_stop_at_limit
= 1;
191 /* Maximum allowed number of insns in execution log. */
192 static unsigned int record_insn_max_num
= DEFAULT_RECORD_INSN_MAX_NUM
;
193 /* Actual count of insns presently in execution log. */
194 static int record_insn_num
= 0;
195 /* Count of insns logged so far (may be larger
196 than count of insns presently in execution log). */
197 static ULONGEST record_insn_count
;
199 /* The target_ops of process record. */
200 static struct target_ops record_ops
;
201 static struct target_ops record_core_ops
;
203 /* The beneath function pointers. */
204 static struct target_ops
*record_beneath_to_resume_ops
;
205 static void (*record_beneath_to_resume
) (struct target_ops
*, ptid_t
, int,
207 static struct target_ops
*record_beneath_to_wait_ops
;
208 static ptid_t (*record_beneath_to_wait
) (struct target_ops
*, ptid_t
,
209 struct target_waitstatus
*,
211 static struct target_ops
*record_beneath_to_store_registers_ops
;
212 static void (*record_beneath_to_store_registers
) (struct target_ops
*,
215 static struct target_ops
*record_beneath_to_xfer_partial_ops
;
216 static LONGEST (*record_beneath_to_xfer_partial
) (struct target_ops
*ops
,
217 enum target_object object
,
220 const gdb_byte
*writebuf
,
223 static int (*record_beneath_to_insert_breakpoint
) (struct gdbarch
*,
224 struct bp_target_info
*);
225 static int (*record_beneath_to_remove_breakpoint
) (struct gdbarch
*,
226 struct bp_target_info
*);
227 static int (*record_beneath_to_stopped_by_watchpoint
) (void);
228 static int (*record_beneath_to_stopped_data_address
) (struct target_ops
*,
231 /* Alloc and free functions for record_reg, record_mem, and record_end
234 /* Alloc a record_reg record entry. */
236 static inline struct record_entry
*
237 record_reg_alloc (struct regcache
*regcache
, int regnum
)
239 struct record_entry
*rec
;
240 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
242 rec
= (struct record_entry
*) xcalloc (1, sizeof (struct record_entry
));
243 rec
->type
= record_reg
;
244 rec
->u
.reg
.num
= regnum
;
245 rec
->u
.reg
.len
= register_size (gdbarch
, regnum
);
246 if (rec
->u
.reg
.len
> sizeof (rec
->u
.reg
.u
.buf
))
247 rec
->u
.reg
.u
.ptr
= (gdb_byte
*) xmalloc (rec
->u
.reg
.len
);
252 /* Free a record_reg record entry. */
255 record_reg_release (struct record_entry
*rec
)
257 gdb_assert (rec
->type
== record_reg
);
258 if (rec
->u
.reg
.len
> sizeof (rec
->u
.reg
.u
.buf
))
259 xfree (rec
->u
.reg
.u
.ptr
);
263 /* Alloc a record_mem record entry. */
265 static inline struct record_entry
*
266 record_mem_alloc (CORE_ADDR addr
, int len
)
268 struct record_entry
*rec
;
270 rec
= (struct record_entry
*) xcalloc (1, sizeof (struct record_entry
));
271 rec
->type
= record_mem
;
272 rec
->u
.mem
.addr
= addr
;
273 rec
->u
.mem
.len
= len
;
274 if (rec
->u
.mem
.len
> sizeof (rec
->u
.mem
.u
.buf
))
275 rec
->u
.mem
.u
.ptr
= (gdb_byte
*) xmalloc (len
);
280 /* Free a record_mem record entry. */
283 record_mem_release (struct record_entry
*rec
)
285 gdb_assert (rec
->type
== record_mem
);
286 if (rec
->u
.mem
.len
> sizeof (rec
->u
.mem
.u
.buf
))
287 xfree (rec
->u
.mem
.u
.ptr
);
291 /* Alloc a record_end record entry. */
293 static inline struct record_entry
*
294 record_end_alloc (void)
296 struct record_entry
*rec
;
298 rec
= (struct record_entry
*) xcalloc (1, sizeof (struct record_entry
));
299 rec
->type
= record_end
;
304 /* Free a record_end record entry. */
307 record_end_release (struct record_entry
*rec
)
312 /* Free one record entry, any type.
313 Return entry->type, in case caller wants to know. */
315 static inline enum record_type
316 record_entry_release (struct record_entry
*rec
)
318 enum record_type type
= rec
->type
;
322 record_reg_release (rec
);
325 record_mem_release (rec
);
328 record_end_release (rec
);
334 /* Free all record entries in list pointed to by REC. */
337 record_list_release (struct record_entry
*rec
)
348 record_entry_release (rec
->next
);
351 if (rec
== &record_first
)
354 record_first
.next
= NULL
;
357 record_entry_release (rec
);
360 /* Free all record entries forward of the given list position. */
363 record_list_release_following (struct record_entry
*rec
)
365 struct record_entry
*tmp
= rec
->next
;
371 if (record_entry_release (tmp
) == record_end
)
380 /* Delete the first instruction from the beginning of the log, to make
381 room for adding a new instruction at the end of the log.
383 Note -- this function does not modify record_insn_num. */
386 record_list_release_first (void)
388 struct record_entry
*tmp
;
390 if (!record_first
.next
)
393 /* Loop until a record_end. */
396 /* Cut record_first.next out of the linked list. */
397 tmp
= record_first
.next
;
398 record_first
.next
= tmp
->next
;
399 tmp
->next
->prev
= &record_first
;
401 /* tmp is now isolated, and can be deleted. */
402 if (record_entry_release (tmp
) == record_end
)
403 break; /* End loop at first record_end. */
405 if (!record_first
.next
)
407 gdb_assert (record_insn_num
== 1);
408 break; /* End loop when list is empty. */
413 /* Add a struct record_entry to record_arch_list. */
416 record_arch_list_add (struct record_entry
*rec
)
418 if (record_debug
> 1)
419 fprintf_unfiltered (gdb_stdlog
,
420 "Process record: record_arch_list_add %s.\n",
421 host_address_to_string (rec
));
423 if (record_arch_list_tail
)
425 record_arch_list_tail
->next
= rec
;
426 rec
->prev
= record_arch_list_tail
;
427 record_arch_list_tail
= rec
;
431 record_arch_list_head
= rec
;
432 record_arch_list_tail
= rec
;
436 /* Return the value storage location of a record entry. */
437 static inline gdb_byte
*
438 record_get_loc (struct record_entry
*rec
)
442 if (rec
->u
.mem
.len
> sizeof (rec
->u
.mem
.u
.buf
))
443 return rec
->u
.mem
.u
.ptr
;
445 return rec
->u
.mem
.u
.buf
;
447 if (rec
->u
.reg
.len
> sizeof (rec
->u
.reg
.u
.buf
))
448 return rec
->u
.reg
.u
.ptr
;
450 return rec
->u
.reg
.u
.buf
;
458 /* Record the value of a register NUM to record_arch_list. */
461 record_arch_list_add_reg (struct regcache
*regcache
, int regnum
)
463 struct record_entry
*rec
;
465 if (record_debug
> 1)
466 fprintf_unfiltered (gdb_stdlog
,
467 "Process record: add register num = %d to "
471 rec
= record_reg_alloc (regcache
, regnum
);
473 regcache_raw_read (regcache
, regnum
, record_get_loc (rec
));
475 record_arch_list_add (rec
);
480 /* Record the value of a region of memory whose address is ADDR and
481 length is LEN to record_arch_list. */
484 record_arch_list_add_mem (CORE_ADDR addr
, int len
)
486 struct record_entry
*rec
;
488 if (record_debug
> 1)
489 fprintf_unfiltered (gdb_stdlog
,
490 "Process record: add mem addr = %s len = %d to "
492 paddress (target_gdbarch
, addr
), len
);
494 if (!addr
) /* FIXME: Why? Some arch must permit it... */
497 rec
= record_mem_alloc (addr
, len
);
499 if (target_read_memory (addr
, record_get_loc (rec
), len
))
502 fprintf_unfiltered (gdb_stdlog
,
503 "Process record: error reading memory at "
504 "addr = %s len = %d.\n",
505 paddress (target_gdbarch
, addr
), len
);
506 record_mem_release (rec
);
510 record_arch_list_add (rec
);
515 /* Add a record_end type struct record_entry to record_arch_list. */
518 record_arch_list_add_end (void)
520 struct record_entry
*rec
;
522 if (record_debug
> 1)
523 fprintf_unfiltered (gdb_stdlog
,
524 "Process record: add end to arch list.\n");
526 rec
= record_end_alloc ();
527 rec
->u
.end
.sigval
= TARGET_SIGNAL_0
;
528 rec
->u
.end
.insn_num
= ++record_insn_count
;
530 record_arch_list_add (rec
);
536 record_check_insn_num (int set_terminal
)
538 if (record_insn_max_num
)
540 gdb_assert (record_insn_num
<= record_insn_max_num
);
541 if (record_insn_num
== record_insn_max_num
)
543 /* Ask user what to do. */
544 if (record_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 stop-at-limit)?"));
553 target_terminal_inferior ();
555 record_stop_at_limit
= 0;
557 error (_("Process record: stopped by user."));
564 record_arch_list_cleanups (void *ignore
)
566 record_list_release (record_arch_list_tail
);
569 /* Before inferior step (when GDB record the running message, inferior
570 only can step), GDB will call this function to record the values to
571 record_list. This function will call gdbarch_process_record to
572 record the running message of inferior and set them to
573 record_arch_list, and add it to record_list. */
576 record_message (struct regcache
*regcache
, enum target_signal signal
)
579 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
580 struct cleanup
*old_cleanups
= make_cleanup (record_arch_list_cleanups
, 0);
582 record_arch_list_head
= NULL
;
583 record_arch_list_tail
= NULL
;
585 /* Check record_insn_num. */
586 record_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_wait, not record_resume. */
610 if (record_list
!= &record_first
) /* FIXME better way to check */
612 gdb_assert (record_list
->type
== record_end
);
613 record_list
->u
.end
.sigval
= signal
;
616 if (signal
== TARGET_SIGNAL_0
617 || !gdbarch_process_record_signal_p (gdbarch
))
618 ret
= gdbarch_process_record (gdbarch
,
620 regcache_read_pc (regcache
));
622 ret
= gdbarch_process_record_signal (gdbarch
,
627 error (_("Process record: inferior program stopped."));
629 error (_("Process record: failed to record execution log."));
631 discard_cleanups (old_cleanups
);
633 record_list
->next
= record_arch_list_head
;
634 record_arch_list_head
->prev
= record_list
;
635 record_list
= record_arch_list_tail
;
637 if (record_insn_num
== record_insn_max_num
&& record_insn_max_num
)
638 record_list_release_first ();
645 struct record_message_args
{
646 struct regcache
*regcache
;
647 enum target_signal signal
;
651 record_message_wrapper (void *args
)
653 struct record_message_args
*record_args
= args
;
655 return record_message (record_args
->regcache
, record_args
->signal
);
659 record_message_wrapper_safe (struct regcache
*regcache
,
660 enum target_signal signal
)
662 struct record_message_args args
;
664 args
.regcache
= regcache
;
665 args
.signal
= signal
;
667 return catch_errors (record_message_wrapper
, &args
, NULL
, RETURN_MASK_ALL
);
670 /* Set to 1 if record_store_registers and record_xfer_partial
671 doesn't need record. */
673 static int record_gdb_operation_disable
= 0;
676 record_gdb_operation_disable_set (void)
678 struct cleanup
*old_cleanups
= NULL
;
681 make_cleanup_restore_integer (&record_gdb_operation_disable
);
682 record_gdb_operation_disable
= 1;
687 /* Flag set to TRUE for target_stopped_by_watchpoint. */
688 static int record_hw_watchpoint
= 0;
690 /* Execute one instruction from the record log. Each instruction in
691 the log will be represented by an arbitrary sequence of register
692 entries and memory entries, followed by an 'end' entry. */
695 record_exec_insn (struct regcache
*regcache
, struct gdbarch
*gdbarch
,
696 struct record_entry
*entry
)
700 case record_reg
: /* reg */
702 gdb_byte reg
[MAX_REGISTER_SIZE
];
704 if (record_debug
> 1)
705 fprintf_unfiltered (gdb_stdlog
,
706 "Process record: record_reg %s to "
707 "inferior num = %d.\n",
708 host_address_to_string (entry
),
711 regcache_cooked_read (regcache
, entry
->u
.reg
.num
, reg
);
712 regcache_cooked_write (regcache
, entry
->u
.reg
.num
,
713 record_get_loc (entry
));
714 memcpy (record_get_loc (entry
), reg
, entry
->u
.reg
.len
);
718 case record_mem
: /* mem */
720 /* Nothing to do if the entry is flagged not_accessible. */
721 if (!entry
->u
.mem
.mem_entry_not_accessible
)
723 gdb_byte
*mem
= alloca (entry
->u
.mem
.len
);
725 if (record_debug
> 1)
726 fprintf_unfiltered (gdb_stdlog
,
727 "Process record: record_mem %s to "
728 "inferior addr = %s len = %d.\n",
729 host_address_to_string (entry
),
730 paddress (gdbarch
, entry
->u
.mem
.addr
),
733 if (target_read_memory (entry
->u
.mem
.addr
, mem
, entry
->u
.mem
.len
))
735 entry
->u
.mem
.mem_entry_not_accessible
= 1;
737 warning ("Process record: error reading memory at "
738 "addr = %s len = %d.",
739 paddress (gdbarch
, entry
->u
.mem
.addr
),
744 if (target_write_memory (entry
->u
.mem
.addr
,
745 record_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_get_loc (entry
), mem
, entry
->u
.mem
.len
);
759 /* We've changed memory --- check if a hardware
760 watchpoint should trap. Note that this
761 presently assumes the target beneath supports
762 continuable watchpoints. On non-continuable
763 watchpoints target, we'll want to check this
764 _before_ actually doing the memory change, and
765 not doing the change at all if the watchpoint
767 if (hardware_watchpoint_inserted_in_range
768 (get_regcache_aspace (regcache
),
769 entry
->u
.mem
.addr
, entry
->u
.mem
.len
))
770 record_hw_watchpoint
= 1;
779 static struct target_ops
*tmp_to_resume_ops
;
780 static void (*tmp_to_resume
) (struct target_ops
*, ptid_t
, int,
782 static struct target_ops
*tmp_to_wait_ops
;
783 static ptid_t (*tmp_to_wait
) (struct target_ops
*, ptid_t
,
784 struct target_waitstatus
*,
786 static struct target_ops
*tmp_to_store_registers_ops
;
787 static void (*tmp_to_store_registers
) (struct target_ops
*,
790 static struct target_ops
*tmp_to_xfer_partial_ops
;
791 static LONGEST (*tmp_to_xfer_partial
) (struct target_ops
*ops
,
792 enum target_object object
,
795 const gdb_byte
*writebuf
,
798 static int (*tmp_to_insert_breakpoint
) (struct gdbarch
*,
799 struct bp_target_info
*);
800 static int (*tmp_to_remove_breakpoint
) (struct gdbarch
*,
801 struct bp_target_info
*);
802 static int (*tmp_to_stopped_by_watchpoint
) (void);
803 static int (*tmp_to_stopped_data_address
) (struct target_ops
*, CORE_ADDR
*);
805 static void record_restore (void);
807 /* Open the process record target. */
810 record_core_open_1 (char *name
, int from_tty
)
812 struct regcache
*regcache
= get_current_regcache ();
813 int regnum
= gdbarch_num_regs (get_regcache_arch (regcache
));
816 /* Get record_core_regbuf. */
817 target_fetch_registers (regcache
, -1);
818 record_core_regbuf
= xmalloc (MAX_REGISTER_SIZE
* regnum
);
819 for (i
= 0; i
< regnum
; i
++)
820 regcache_raw_collect (regcache
, i
,
821 record_core_regbuf
+ MAX_REGISTER_SIZE
* i
);
823 /* Get record_core_start and record_core_end. */
824 if (build_section_table (core_bfd
, &record_core_start
, &record_core_end
))
826 xfree (record_core_regbuf
);
827 record_core_regbuf
= NULL
;
828 error (_("\"%s\": Can't find sections: %s"),
829 bfd_get_filename (core_bfd
), bfd_errmsg (bfd_get_error ()));
832 push_target (&record_core_ops
);
836 /* "to_open" target method for 'live' processes. */
839 record_open_1 (char *name
, int from_tty
)
841 struct target_ops
*t
;
844 fprintf_unfiltered (gdb_stdlog
, "Process record: record_open\n");
847 if (!target_has_execution
)
848 error (_("Process record: the program is not being run."));
850 error (_("Process record target can't debug inferior in non-stop mode "
852 if (target_async_permitted
)
853 error (_("Process record target can't debug inferior in asynchronous "
854 "mode (target-async)."));
856 if (!gdbarch_process_record_p (target_gdbarch
))
857 error (_("Process record: the current architecture doesn't support "
858 "record function."));
861 error (_("Could not find 'to_resume' method on the target stack."));
863 error (_("Could not find 'to_wait' method on the target stack."));
864 if (!tmp_to_store_registers
)
865 error (_("Could not find 'to_store_registers' method on the target stack."));
866 if (!tmp_to_insert_breakpoint
)
867 error (_("Could not find 'to_insert_breakpoint' method on the target stack."));
868 if (!tmp_to_remove_breakpoint
)
869 error (_("Could not find 'to_remove_breakpoint' method on the target stack."));
870 if (!tmp_to_stopped_by_watchpoint
)
871 error (_("Could not find 'to_stopped_by_watchpoint' method on the target stack."));
872 if (!tmp_to_stopped_data_address
)
873 error (_("Could not find 'to_stopped_data_address' method on the target stack."));
875 push_target (&record_ops
);
878 /* "to_open" target method. Open the process record target. */
881 record_open (char *name
, int from_tty
)
883 struct target_ops
*t
;
886 fprintf_unfiltered (gdb_stdlog
, "Process record: record_open\n");
888 /* Check if record target is already running. */
889 if (current_target
.to_stratum
== record_stratum
)
890 error (_("Process record target already running. Use \"record stop\" to "
891 "stop record target first."));
893 /* Reset the tmp beneath pointers. */
894 tmp_to_resume_ops
= NULL
;
895 tmp_to_resume
= NULL
;
896 tmp_to_wait_ops
= NULL
;
898 tmp_to_store_registers_ops
= NULL
;
899 tmp_to_store_registers
= NULL
;
900 tmp_to_xfer_partial_ops
= NULL
;
901 tmp_to_xfer_partial
= NULL
;
902 tmp_to_insert_breakpoint
= NULL
;
903 tmp_to_remove_breakpoint
= NULL
;
904 tmp_to_stopped_by_watchpoint
= NULL
;
905 tmp_to_stopped_data_address
= NULL
;
907 /* Set the beneath function pointers. */
908 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
912 tmp_to_resume
= t
->to_resume
;
913 tmp_to_resume_ops
= t
;
917 tmp_to_wait
= t
->to_wait
;
920 if (!tmp_to_store_registers
)
922 tmp_to_store_registers
= t
->to_store_registers
;
923 tmp_to_store_registers_ops
= t
;
925 if (!tmp_to_xfer_partial
)
927 tmp_to_xfer_partial
= t
->to_xfer_partial
;
928 tmp_to_xfer_partial_ops
= t
;
930 if (!tmp_to_insert_breakpoint
)
931 tmp_to_insert_breakpoint
= t
->to_insert_breakpoint
;
932 if (!tmp_to_remove_breakpoint
)
933 tmp_to_remove_breakpoint
= t
->to_remove_breakpoint
;
934 if (!tmp_to_stopped_by_watchpoint
)
935 tmp_to_stopped_by_watchpoint
= t
->to_stopped_by_watchpoint
;
936 if (!tmp_to_stopped_data_address
)
937 tmp_to_stopped_data_address
= t
->to_stopped_data_address
;
939 if (!tmp_to_xfer_partial
)
940 error (_("Could not find 'to_xfer_partial' method on the target stack."));
944 record_insn_count
= 0;
945 record_list
= &record_first
;
946 record_list
->next
= NULL
;
948 /* Set the tmp beneath pointers to beneath pointers. */
949 record_beneath_to_resume_ops
= tmp_to_resume_ops
;
950 record_beneath_to_resume
= tmp_to_resume
;
951 record_beneath_to_wait_ops
= tmp_to_wait_ops
;
952 record_beneath_to_wait
= tmp_to_wait
;
953 record_beneath_to_store_registers_ops
= tmp_to_store_registers_ops
;
954 record_beneath_to_store_registers
= tmp_to_store_registers
;
955 record_beneath_to_xfer_partial_ops
= tmp_to_xfer_partial_ops
;
956 record_beneath_to_xfer_partial
= tmp_to_xfer_partial
;
957 record_beneath_to_insert_breakpoint
= tmp_to_insert_breakpoint
;
958 record_beneath_to_remove_breakpoint
= tmp_to_remove_breakpoint
;
959 record_beneath_to_stopped_by_watchpoint
= tmp_to_stopped_by_watchpoint
;
960 record_beneath_to_stopped_data_address
= tmp_to_stopped_data_address
;
962 if (current_target
.to_stratum
== core_stratum
)
963 record_core_open_1 (name
, from_tty
);
965 record_open_1 (name
, from_tty
);
968 /* "to_close" target method. Close the process record target. */
971 record_close (int quitting
)
973 struct record_core_buf_entry
*entry
;
976 fprintf_unfiltered (gdb_stdlog
, "Process record: record_close\n");
978 record_list_release (record_list
);
980 /* Release record_core_regbuf. */
981 if (record_core_regbuf
)
983 xfree (record_core_regbuf
);
984 record_core_regbuf
= NULL
;
987 /* Release record_core_buf_list. */
988 if (record_core_buf_list
)
990 for (entry
= record_core_buf_list
->prev
; entry
; entry
= entry
->prev
)
992 xfree (record_core_buf_list
);
993 record_core_buf_list
= entry
;
995 record_core_buf_list
= NULL
;
999 static int record_resume_step
= 0;
1001 /* "to_resume" target method. Resume the process record target. */
1004 record_resume (struct target_ops
*ops
, ptid_t ptid
, int step
,
1005 enum target_signal signal
)
1007 record_resume_step
= step
;
1009 if (!RECORD_IS_REPLAY
)
1011 record_message (get_current_regcache (), signal
);
1012 record_beneath_to_resume (record_beneath_to_resume_ops
, ptid
, 1,
1017 static int record_get_sig
= 0;
1019 /* SIGINT signal handler, registered by "to_wait" method. */
1022 record_sig_handler (int signo
)
1025 fprintf_unfiltered (gdb_stdlog
, "Process record: get a signal\n");
1027 /* It will break the running inferior in replay mode. */
1028 record_resume_step
= 1;
1030 /* It will let record_wait set inferior status to get the signal
1036 record_wait_cleanups (void *ignore
)
1038 if (execution_direction
== EXEC_REVERSE
)
1040 if (record_list
->next
)
1041 record_list
= record_list
->next
;
1044 record_list
= record_list
->prev
;
1047 /* "to_wait" target method for process record target.
1049 In record mode, the target is always run in singlestep mode
1050 (even when gdb says to continue). The to_wait method intercepts
1051 the stop events and determines which ones are to be passed on to
1052 gdb. Most stop events are just singlestep events that gdb is not
1053 to know about, so the to_wait method just records them and keeps
1056 In replay mode, this function emulates the recorded execution log,
1057 one instruction at a time (forward or backward), and determines
1061 record_wait (struct target_ops
*ops
,
1062 ptid_t ptid
, struct target_waitstatus
*status
,
1065 struct cleanup
*set_cleanups
= record_gdb_operation_disable_set ();
1068 fprintf_unfiltered (gdb_stdlog
,
1069 "Process record: record_wait "
1070 "record_resume_step = %d\n",
1071 record_resume_step
);
1073 if (!RECORD_IS_REPLAY
&& ops
!= &record_core_ops
)
1075 if (record_resume_step
)
1077 /* This is a single step. */
1078 return record_beneath_to_wait (record_beneath_to_wait_ops
,
1079 ptid
, status
, options
);
1083 /* This is not a single step. */
1089 ret
= record_beneath_to_wait (record_beneath_to_wait_ops
,
1090 ptid
, status
, options
);
1092 /* Is this a SIGTRAP? */
1093 if (status
->kind
== TARGET_WAITKIND_STOPPED
1094 && status
->value
.sig
== TARGET_SIGNAL_TRAP
)
1096 struct regcache
*regcache
;
1097 struct address_space
*aspace
;
1099 /* Yes -- this is likely our single-step finishing,
1100 but check if there's any reason the core would be
1101 interested in the event. */
1103 registers_changed ();
1104 regcache
= get_current_regcache ();
1105 tmp_pc
= regcache_read_pc (regcache
);
1106 aspace
= get_regcache_aspace (regcache
);
1108 if (target_stopped_by_watchpoint ())
1110 /* Always interested in watchpoints. */
1112 else if (breakpoint_inserted_here_p (aspace
, tmp_pc
))
1114 /* There is a breakpoint here. Let the core
1116 if (software_breakpoint_inserted_here_p (aspace
, tmp_pc
))
1118 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
1119 CORE_ADDR decr_pc_after_break
1120 = gdbarch_decr_pc_after_break (gdbarch
);
1121 if (decr_pc_after_break
)
1122 regcache_write_pc (regcache
,
1123 tmp_pc
+ decr_pc_after_break
);
1128 /* This must be a single-step trap. Record the
1129 insn and issue another step. */
1130 if (!record_message_wrapper_safe (regcache
,
1133 status
->kind
= TARGET_WAITKIND_STOPPED
;
1134 status
->value
.sig
= TARGET_SIGNAL_0
;
1138 record_beneath_to_resume (record_beneath_to_resume_ops
,
1145 /* The inferior is broken by a breakpoint or a signal. */
1154 struct regcache
*regcache
= get_current_regcache ();
1155 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
1156 struct address_space
*aspace
= get_regcache_aspace (regcache
);
1157 int continue_flag
= 1;
1158 int first_record_end
= 1;
1159 struct cleanup
*old_cleanups
= make_cleanup (record_wait_cleanups
, 0);
1162 record_hw_watchpoint
= 0;
1163 status
->kind
= TARGET_WAITKIND_STOPPED
;
1165 /* Check breakpoint when forward execute. */
1166 if (execution_direction
== EXEC_FORWARD
)
1168 tmp_pc
= regcache_read_pc (regcache
);
1169 if (breakpoint_inserted_here_p (aspace
, tmp_pc
))
1171 int decr_pc_after_break
= gdbarch_decr_pc_after_break (gdbarch
);
1174 fprintf_unfiltered (gdb_stdlog
,
1175 "Process record: break at %s.\n",
1176 paddress (gdbarch
, tmp_pc
));
1178 if (decr_pc_after_break
1179 && !record_resume_step
1180 && software_breakpoint_inserted_here_p (aspace
, tmp_pc
))
1181 regcache_write_pc (regcache
,
1182 tmp_pc
+ decr_pc_after_break
);
1188 signal (SIGINT
, record_sig_handler
);
1189 /* If GDB is in terminal_inferior mode, it will not get the signal.
1190 And in GDB replay mode, GDB doesn't need to be in terminal_inferior
1191 mode, because inferior will not executed.
1192 Then set it to terminal_ours to make GDB get the signal. */
1193 target_terminal_ours ();
1195 /* In EXEC_FORWARD mode, record_list points to the tail of prev
1197 if (execution_direction
== EXEC_FORWARD
&& record_list
->next
)
1198 record_list
= record_list
->next
;
1200 /* Loop over the record_list, looking for the next place to
1204 /* Check for beginning and end of log. */
1205 if (execution_direction
== EXEC_REVERSE
1206 && record_list
== &record_first
)
1208 /* Hit beginning of record log in reverse. */
1209 status
->kind
= TARGET_WAITKIND_NO_HISTORY
;
1212 if (execution_direction
!= EXEC_REVERSE
&& !record_list
->next
)
1214 /* Hit end of record log going forward. */
1215 status
->kind
= TARGET_WAITKIND_NO_HISTORY
;
1219 record_exec_insn (regcache
, gdbarch
, record_list
);
1221 if (record_list
->type
== record_end
)
1223 if (record_debug
> 1)
1224 fprintf_unfiltered (gdb_stdlog
,
1225 "Process record: record_end %s to "
1227 host_address_to_string (record_list
));
1229 if (first_record_end
&& execution_direction
== EXEC_REVERSE
)
1231 /* When reverse excute, the first record_end is the part of
1232 current instruction. */
1233 first_record_end
= 0;
1237 /* In EXEC_REVERSE mode, this is the record_end of prev
1239 In EXEC_FORWARD mode, this is the record_end of current
1242 if (record_resume_step
)
1244 if (record_debug
> 1)
1245 fprintf_unfiltered (gdb_stdlog
,
1246 "Process record: step.\n");
1250 /* check breakpoint */
1251 tmp_pc
= regcache_read_pc (regcache
);
1252 if (breakpoint_inserted_here_p (aspace
, tmp_pc
))
1254 int decr_pc_after_break
1255 = gdbarch_decr_pc_after_break (gdbarch
);
1258 fprintf_unfiltered (gdb_stdlog
,
1259 "Process record: break "
1261 paddress (gdbarch
, tmp_pc
));
1262 if (decr_pc_after_break
1263 && execution_direction
== EXEC_FORWARD
1264 && !record_resume_step
1265 && software_breakpoint_inserted_here_p (aspace
,
1267 regcache_write_pc (regcache
,
1268 tmp_pc
+ decr_pc_after_break
);
1272 if (record_hw_watchpoint
)
1275 fprintf_unfiltered (gdb_stdlog
, "\
1276 Process record: hit hw watchpoint.\n");
1279 /* Check target signal */
1280 if (record_list
->u
.end
.sigval
!= TARGET_SIGNAL_0
)
1281 /* FIXME: better way to check */
1288 if (execution_direction
== EXEC_REVERSE
)
1290 if (record_list
->prev
)
1291 record_list
= record_list
->prev
;
1295 if (record_list
->next
)
1296 record_list
= record_list
->next
;
1300 while (continue_flag
);
1302 signal (SIGINT
, handle_sigint
);
1306 status
->value
.sig
= TARGET_SIGNAL_INT
;
1307 else if (record_list
->u
.end
.sigval
!= TARGET_SIGNAL_0
)
1308 /* FIXME: better way to check */
1309 status
->value
.sig
= record_list
->u
.end
.sigval
;
1311 status
->value
.sig
= TARGET_SIGNAL_TRAP
;
1313 discard_cleanups (old_cleanups
);
1316 do_cleanups (set_cleanups
);
1317 return inferior_ptid
;
1321 record_stopped_by_watchpoint (void)
1323 if (RECORD_IS_REPLAY
)
1324 return record_hw_watchpoint
;
1326 return record_beneath_to_stopped_by_watchpoint ();
1330 record_stopped_data_address (struct target_ops
*ops
, CORE_ADDR
*addr_p
)
1332 if (RECORD_IS_REPLAY
)
1335 return record_beneath_to_stopped_data_address (ops
, addr_p
);
1338 /* "to_disconnect" method for process record target. */
1341 record_disconnect (struct target_ops
*target
, char *args
, int from_tty
)
1344 fprintf_unfiltered (gdb_stdlog
, "Process record: record_disconnect\n");
1346 unpush_target (&record_ops
);
1347 target_disconnect (args
, from_tty
);
1350 /* "to_detach" method for process record target. */
1353 record_detach (struct target_ops
*ops
, char *args
, int from_tty
)
1356 fprintf_unfiltered (gdb_stdlog
, "Process record: record_detach\n");
1358 unpush_target (&record_ops
);
1359 target_detach (args
, from_tty
);
1362 /* "to_mourn_inferior" method for process record target. */
1365 record_mourn_inferior (struct target_ops
*ops
)
1368 fprintf_unfiltered (gdb_stdlog
, "Process record: "
1369 "record_mourn_inferior\n");
1371 unpush_target (&record_ops
);
1372 target_mourn_inferior ();
1375 /* Close process record target before killing the inferior process. */
1378 record_kill (struct target_ops
*ops
)
1381 fprintf_unfiltered (gdb_stdlog
, "Process record: record_kill\n");
1383 unpush_target (&record_ops
);
1387 /* Record registers change (by user or by GDB) to list as an instruction. */
1390 record_registers_change (struct regcache
*regcache
, int regnum
)
1392 /* Check record_insn_num. */
1393 record_check_insn_num (0);
1395 record_arch_list_head
= NULL
;
1396 record_arch_list_tail
= NULL
;
1401 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
1403 if (record_arch_list_add_reg (regcache
, i
))
1405 record_list_release (record_arch_list_tail
);
1406 error (_("Process record: failed to record execution log."));
1412 if (record_arch_list_add_reg (regcache
, regnum
))
1414 record_list_release (record_arch_list_tail
);
1415 error (_("Process record: failed to record execution log."));
1418 if (record_arch_list_add_end ())
1420 record_list_release (record_arch_list_tail
);
1421 error (_("Process record: failed to record execution log."));
1423 record_list
->next
= record_arch_list_head
;
1424 record_arch_list_head
->prev
= record_list
;
1425 record_list
= record_arch_list_tail
;
1427 if (record_insn_num
== record_insn_max_num
&& record_insn_max_num
)
1428 record_list_release_first ();
1433 /* "to_store_registers" method for process record target. */
1436 record_store_registers (struct target_ops
*ops
, struct regcache
*regcache
,
1439 if (!record_gdb_operation_disable
)
1441 if (RECORD_IS_REPLAY
)
1445 /* Let user choose if he wants to write register or not. */
1448 query (_("Because GDB is in replay mode, changing the "
1449 "value of a register will make the execution "
1450 "log unusable from this point onward. "
1451 "Change all registers?"));
1454 query (_("Because GDB is in replay mode, changing the value "
1455 "of a register will make the execution log unusable "
1456 "from this point onward. Change register %s?"),
1457 gdbarch_register_name (get_regcache_arch (regcache
),
1462 /* Invalidate the value of regcache that was set in function
1463 "regcache_raw_write". */
1468 i
< gdbarch_num_regs (get_regcache_arch (regcache
));
1470 regcache_invalidate (regcache
, i
);
1473 regcache_invalidate (regcache
, regno
);
1475 error (_("Process record canceled the operation."));
1478 /* Destroy the record from here forward. */
1479 record_list_release_following (record_list
);
1482 record_registers_change (regcache
, regno
);
1484 record_beneath_to_store_registers (record_beneath_to_store_registers_ops
,
1488 /* "to_xfer_partial" method. Behavior is conditional on RECORD_IS_REPLAY.
1489 In replay mode, we cannot write memory unles we are willing to
1490 invalidate the record/replay log from this point forward. */
1493 record_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1494 const char *annex
, gdb_byte
*readbuf
,
1495 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
1497 if (!record_gdb_operation_disable
1498 && (object
== TARGET_OBJECT_MEMORY
1499 || object
== TARGET_OBJECT_RAW_MEMORY
) && writebuf
)
1501 if (RECORD_IS_REPLAY
)
1503 /* Let user choose if he wants to write memory or not. */
1504 if (!query (_("Because GDB is in replay mode, writing to memory "
1505 "will make the execution log unusable from this "
1506 "point onward. Write memory at address %s?"),
1507 paddress (target_gdbarch
, offset
)))
1508 error (_("Process record canceled the operation."));
1510 /* Destroy the record from here forward. */
1511 record_list_release_following (record_list
);
1514 /* Check record_insn_num */
1515 record_check_insn_num (0);
1517 /* Record registers change to list as an instruction. */
1518 record_arch_list_head
= NULL
;
1519 record_arch_list_tail
= NULL
;
1520 if (record_arch_list_add_mem (offset
, len
))
1522 record_list_release (record_arch_list_tail
);
1524 fprintf_unfiltered (gdb_stdlog
,
1525 "Process record: failed to record "
1529 if (record_arch_list_add_end ())
1531 record_list_release (record_arch_list_tail
);
1533 fprintf_unfiltered (gdb_stdlog
,
1534 "Process record: failed to record "
1538 record_list
->next
= record_arch_list_head
;
1539 record_arch_list_head
->prev
= record_list
;
1540 record_list
= record_arch_list_tail
;
1542 if (record_insn_num
== record_insn_max_num
&& record_insn_max_num
)
1543 record_list_release_first ();
1548 return record_beneath_to_xfer_partial (record_beneath_to_xfer_partial_ops
,
1549 object
, annex
, readbuf
, writebuf
,
1553 /* Behavior is conditional on RECORD_IS_REPLAY.
1554 We will not actually insert or remove breakpoints when replaying,
1555 nor when recording. */
1558 record_insert_breakpoint (struct gdbarch
*gdbarch
,
1559 struct bp_target_info
*bp_tgt
)
1561 if (!RECORD_IS_REPLAY
)
1563 struct cleanup
*old_cleanups
= record_gdb_operation_disable_set ();
1564 int ret
= record_beneath_to_insert_breakpoint (gdbarch
, bp_tgt
);
1566 do_cleanups (old_cleanups
);
1574 /* "to_remove_breakpoint" method for process record target. */
1577 record_remove_breakpoint (struct gdbarch
*gdbarch
,
1578 struct bp_target_info
*bp_tgt
)
1580 if (!RECORD_IS_REPLAY
)
1582 struct cleanup
*old_cleanups
= record_gdb_operation_disable_set ();
1583 int ret
= record_beneath_to_remove_breakpoint (gdbarch
, bp_tgt
);
1585 do_cleanups (old_cleanups
);
1593 /* "to_can_execute_reverse" method for process record target. */
1596 record_can_execute_reverse (void)
1601 /* "to_get_bookmark" method for process record and prec over core. */
1604 record_get_bookmark (char *args
, int from_tty
)
1606 gdb_byte
*ret
= NULL
;
1608 /* Return stringified form of instruction count. */
1609 if (record_list
&& record_list
->type
== record_end
)
1610 ret
= xstrdup (pulongest (record_list
->u
.end
.insn_num
));
1615 fprintf_unfiltered (gdb_stdlog
,
1616 "record_get_bookmark returns %s\n", ret
);
1618 fprintf_unfiltered (gdb_stdlog
,
1619 "record_get_bookmark returns NULL\n");
1624 /* The implementation of the command "record goto". */
1625 static void cmd_record_goto (char *, int);
1627 /* "to_goto_bookmark" method for process record and prec over core. */
1630 record_goto_bookmark (gdb_byte
*bookmark
, int from_tty
)
1633 fprintf_unfiltered (gdb_stdlog
,
1634 "record_goto_bookmark receives %s\n", bookmark
);
1636 if (bookmark
[0] == '\'' || bookmark
[0] == '\"')
1638 if (bookmark
[strlen (bookmark
) - 1] != bookmark
[0])
1639 error (_("Unbalanced quotes: %s"), bookmark
);
1641 /* Strip trailing quote. */
1642 bookmark
[strlen (bookmark
) - 1] = '\0';
1643 /* Strip leading quote. */
1645 /* Pass along to cmd_record_goto. */
1648 cmd_record_goto ((char *) bookmark
, from_tty
);
1653 init_record_ops (void)
1655 record_ops
.to_shortname
= "record";
1656 record_ops
.to_longname
= "Process record and replay target";
1658 "Log program while executing and replay execution from log.";
1659 record_ops
.to_open
= record_open
;
1660 record_ops
.to_close
= record_close
;
1661 record_ops
.to_resume
= record_resume
;
1662 record_ops
.to_wait
= record_wait
;
1663 record_ops
.to_disconnect
= record_disconnect
;
1664 record_ops
.to_detach
= record_detach
;
1665 record_ops
.to_mourn_inferior
= record_mourn_inferior
;
1666 record_ops
.to_kill
= record_kill
;
1667 record_ops
.to_create_inferior
= find_default_create_inferior
;
1668 record_ops
.to_store_registers
= record_store_registers
;
1669 record_ops
.to_xfer_partial
= record_xfer_partial
;
1670 record_ops
.to_insert_breakpoint
= record_insert_breakpoint
;
1671 record_ops
.to_remove_breakpoint
= record_remove_breakpoint
;
1672 record_ops
.to_stopped_by_watchpoint
= record_stopped_by_watchpoint
;
1673 record_ops
.to_stopped_data_address
= record_stopped_data_address
;
1674 record_ops
.to_can_execute_reverse
= record_can_execute_reverse
;
1675 record_ops
.to_stratum
= record_stratum
;
1676 /* Add bookmark target methods. */
1677 record_ops
.to_get_bookmark
= record_get_bookmark
;
1678 record_ops
.to_goto_bookmark
= record_goto_bookmark
;
1679 record_ops
.to_magic
= OPS_MAGIC
;
1682 /* "to_resume" method for prec over corefile. */
1685 record_core_resume (struct target_ops
*ops
, ptid_t ptid
, int step
,
1686 enum target_signal signal
)
1688 record_resume_step
= step
;
1691 /* "to_kill" method for prec over corefile. */
1694 record_core_kill (struct target_ops
*ops
)
1697 fprintf_unfiltered (gdb_stdlog
, "Process record: record_core_kill\n");
1699 unpush_target (&record_core_ops
);
1702 /* "to_fetch_registers" method for prec over corefile. */
1705 record_core_fetch_registers (struct target_ops
*ops
,
1706 struct regcache
*regcache
,
1711 int num
= gdbarch_num_regs (get_regcache_arch (regcache
));
1714 for (i
= 0; i
< num
; i
++)
1715 regcache_raw_supply (regcache
, i
,
1716 record_core_regbuf
+ MAX_REGISTER_SIZE
* i
);
1719 regcache_raw_supply (regcache
, regno
,
1720 record_core_regbuf
+ MAX_REGISTER_SIZE
* regno
);
1723 /* "to_prepare_to_store" method for prec over corefile. */
1726 record_core_prepare_to_store (struct regcache
*regcache
)
1730 /* "to_store_registers" method for prec over corefile. */
1733 record_core_store_registers (struct target_ops
*ops
,
1734 struct regcache
*regcache
,
1737 if (record_gdb_operation_disable
)
1738 regcache_raw_collect (regcache
, regno
,
1739 record_core_regbuf
+ MAX_REGISTER_SIZE
* regno
);
1741 error (_("You can't do that without a process to debug."));
1744 /* "to_xfer_partial" method for prec over corefile. */
1747 record_core_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1748 const char *annex
, gdb_byte
*readbuf
,
1749 const gdb_byte
*writebuf
, ULONGEST offset
,
1752 if (object
== TARGET_OBJECT_MEMORY
)
1754 if (record_gdb_operation_disable
|| !writebuf
)
1756 struct target_section
*p
;
1757 for (p
= record_core_start
; p
< record_core_end
; p
++)
1759 if (offset
>= p
->addr
)
1761 struct record_core_buf_entry
*entry
;
1762 ULONGEST sec_offset
;
1764 if (offset
>= p
->endaddr
)
1767 if (offset
+ len
> p
->endaddr
)
1768 len
= p
->endaddr
- offset
;
1770 sec_offset
= offset
- p
->addr
;
1772 /* Read readbuf or write writebuf p, offset, len. */
1774 if (p
->the_bfd_section
->flags
& SEC_CONSTRUCTOR
1775 || (p
->the_bfd_section
->flags
& SEC_HAS_CONTENTS
) == 0)
1778 memset (readbuf
, 0, len
);
1781 /* Get record_core_buf_entry. */
1782 for (entry
= record_core_buf_list
; entry
;
1783 entry
= entry
->prev
)
1790 /* Add a new entry. */
1792 = (struct record_core_buf_entry
*)
1794 (sizeof (struct record_core_buf_entry
));
1796 if (!bfd_malloc_and_get_section (p
->bfd
,
1803 entry
->prev
= record_core_buf_list
;
1804 record_core_buf_list
= entry
;
1807 memcpy (entry
->buf
+ sec_offset
, writebuf
,
1813 return record_beneath_to_xfer_partial
1814 (record_beneath_to_xfer_partial_ops
,
1815 object
, annex
, readbuf
, writebuf
,
1818 memcpy (readbuf
, entry
->buf
+ sec_offset
,
1829 error (_("You can't do that without a process to debug."));
1832 return record_beneath_to_xfer_partial (record_beneath_to_xfer_partial_ops
,
1833 object
, annex
, readbuf
, writebuf
,
1837 /* "to_insert_breakpoint" method for prec over corefile. */
1840 record_core_insert_breakpoint (struct gdbarch
*gdbarch
,
1841 struct bp_target_info
*bp_tgt
)
1846 /* "to_remove_breakpoint" method for prec over corefile. */
1849 record_core_remove_breakpoint (struct gdbarch
*gdbarch
,
1850 struct bp_target_info
*bp_tgt
)
1855 /* "to_has_execution" method for prec over corefile. */
1858 record_core_has_execution (struct target_ops
*ops
)
1864 init_record_core_ops (void)
1866 record_core_ops
.to_shortname
= "record_core";
1867 record_core_ops
.to_longname
= "Process record and replay target";
1868 record_core_ops
.to_doc
=
1869 "Log program while executing and replay execution from log.";
1870 record_core_ops
.to_open
= record_open
;
1871 record_core_ops
.to_close
= record_close
;
1872 record_core_ops
.to_resume
= record_core_resume
;
1873 record_core_ops
.to_wait
= record_wait
;
1874 record_core_ops
.to_kill
= record_core_kill
;
1875 record_core_ops
.to_fetch_registers
= record_core_fetch_registers
;
1876 record_core_ops
.to_prepare_to_store
= record_core_prepare_to_store
;
1877 record_core_ops
.to_store_registers
= record_core_store_registers
;
1878 record_core_ops
.to_xfer_partial
= record_core_xfer_partial
;
1879 record_core_ops
.to_insert_breakpoint
= record_core_insert_breakpoint
;
1880 record_core_ops
.to_remove_breakpoint
= record_core_remove_breakpoint
;
1881 record_core_ops
.to_stopped_by_watchpoint
= record_stopped_by_watchpoint
;
1882 record_core_ops
.to_stopped_data_address
= record_stopped_data_address
;
1883 record_core_ops
.to_can_execute_reverse
= record_can_execute_reverse
;
1884 record_core_ops
.to_has_execution
= record_core_has_execution
;
1885 record_core_ops
.to_stratum
= record_stratum
;
1886 /* Add bookmark target methods. */
1887 record_core_ops
.to_get_bookmark
= record_get_bookmark
;
1888 record_core_ops
.to_goto_bookmark
= record_goto_bookmark
;
1889 record_core_ops
.to_magic
= OPS_MAGIC
;
1892 /* Implement "show record debug" command. */
1895 show_record_debug (struct ui_file
*file
, int from_tty
,
1896 struct cmd_list_element
*c
, const char *value
)
1898 fprintf_filtered (file
, _("Debugging of process record target is %s.\n"),
1902 /* Alias for "target record". */
1905 cmd_record_start (char *args
, int from_tty
)
1907 execute_command ("target record", from_tty
);
1910 /* Truncate the record log from the present point
1911 of replay until the end. */
1914 cmd_record_delete (char *args
, int from_tty
)
1916 if (current_target
.to_stratum
== record_stratum
)
1918 if (RECORD_IS_REPLAY
)
1920 if (!from_tty
|| query (_("Delete the log from this point forward "
1921 "and begin to record the running message "
1923 record_list_release_following (record_list
);
1926 printf_unfiltered (_("Already at end of record list.\n"));
1930 printf_unfiltered (_("Process record is not started.\n"));
1933 /* Implement the "stoprecord" or "record stop" command. */
1936 cmd_record_stop (char *args
, int from_tty
)
1938 if (current_target
.to_stratum
== record_stratum
)
1940 unpush_target (&record_ops
);
1941 printf_unfiltered (_("Process record is stopped and all execution "
1942 "logs are deleted.\n"));
1945 printf_unfiltered (_("Process record is not started.\n"));
1948 /* Set upper limit of record log size. */
1951 set_record_insn_max_num (char *args
, int from_tty
, struct cmd_list_element
*c
)
1953 if (record_insn_num
> record_insn_max_num
&& record_insn_max_num
)
1955 /* Count down record_insn_num while releasing records from list. */
1956 while (record_insn_num
> record_insn_max_num
)
1958 record_list_release_first ();
1964 static struct cmd_list_element
*record_cmdlist
, *set_record_cmdlist
,
1965 *show_record_cmdlist
, *info_record_cmdlist
;
1968 set_record_command (char *args
, int from_tty
)
1970 printf_unfiltered (_("\
1971 \"set record\" must be followed by an apporpriate subcommand.\n"));
1972 help_list (set_record_cmdlist
, "set record ", all_commands
, gdb_stdout
);
1976 show_record_command (char *args
, int from_tty
)
1978 cmd_show_list (show_record_cmdlist
, from_tty
, "");
1981 /* Display some statistics about the execution log. */
1984 info_record_command (char *args
, int from_tty
)
1986 struct record_entry
*p
;
1988 if (current_target
.to_stratum
== record_stratum
)
1990 if (RECORD_IS_REPLAY
)
1991 printf_filtered (_("Replay mode:\n"));
1993 printf_filtered (_("Record mode:\n"));
1995 /* Find entry for first actual instruction in the log. */
1996 for (p
= record_first
.next
;
1997 p
!= NULL
&& p
->type
!= record_end
;
2001 /* Do we have a log at all? */
2002 if (p
!= NULL
&& p
->type
== record_end
)
2004 /* Display instruction number for first instruction in the log. */
2005 printf_filtered (_("Lowest recorded instruction number is %s.\n"),
2006 pulongest (p
->u
.end
.insn_num
));
2008 /* If in replay mode, display where we are in the log. */
2009 if (RECORD_IS_REPLAY
)
2010 printf_filtered (_("Current instruction number is %s.\n"),
2011 pulongest (record_list
->u
.end
.insn_num
));
2013 /* Display instruction number for last instruction in the log. */
2014 printf_filtered (_("Highest recorded instruction number is %s.\n"),
2015 pulongest (record_insn_count
));
2017 /* Display log count. */
2018 printf_filtered (_("Log contains %d instructions.\n"),
2023 printf_filtered (_("No instructions have been logged.\n"));
2028 printf_filtered (_("target record is not active.\n"));
2031 /* Display max log size. */
2032 printf_filtered (_("Max logged instructions is %d.\n"),
2033 record_insn_max_num
);
2036 /* Record log save-file format
2037 Version 1 (never released)
2040 4 bytes: magic number htonl(0x20090829).
2041 NOTE: be sure to change whenever this file format changes!
2045 1 byte: record type (record_end, see enum record_type).
2047 1 byte: record type (record_reg, see enum record_type).
2048 8 bytes: register id (network byte order).
2049 MAX_REGISTER_SIZE bytes: register value.
2051 1 byte: record type (record_mem, see enum record_type).
2052 8 bytes: memory length (network byte order).
2053 8 bytes: memory address (network byte order).
2054 n bytes: memory value (n == memory length).
2057 4 bytes: magic number netorder32(0x20091016).
2058 NOTE: be sure to change whenever this file format changes!
2062 1 byte: record type (record_end, see enum record_type).
2064 4 bytes: instruction count
2066 1 byte: record type (record_reg, see enum record_type).
2067 4 bytes: register id (network byte order).
2068 n bytes: register value (n == actual register size).
2069 (eg. 4 bytes for x86 general registers).
2071 1 byte: record type (record_mem, see enum record_type).
2072 4 bytes: memory length (network byte order).
2073 8 bytes: memory address (network byte order).
2074 n bytes: memory value (n == memory length).
2078 /* bfdcore_read -- read bytes from a core file section. */
2081 bfdcore_read (bfd
*obfd
, asection
*osec
, void *buf
, int len
, int *offset
)
2083 int ret
= bfd_get_section_contents (obfd
, osec
, buf
, *offset
, len
);
2088 error (_("Failed to read %d bytes from core file %s ('%s').\n"),
2089 len
, bfd_get_filename (obfd
),
2090 bfd_errmsg (bfd_get_error ()));
2093 static inline uint64_t
2094 netorder64 (uint64_t input
)
2098 store_unsigned_integer ((gdb_byte
*) &ret
, sizeof (ret
),
2099 BFD_ENDIAN_BIG
, input
);
2103 static inline uint32_t
2104 netorder32 (uint32_t input
)
2108 store_unsigned_integer ((gdb_byte
*) &ret
, sizeof (ret
),
2109 BFD_ENDIAN_BIG
, input
);
2113 static inline uint16_t
2114 netorder16 (uint16_t input
)
2118 store_unsigned_integer ((gdb_byte
*) &ret
, sizeof (ret
),
2119 BFD_ENDIAN_BIG
, input
);
2123 /* Restore the execution log from a core_bfd file. */
2125 record_restore (void)
2128 struct cleanup
*old_cleanups
;
2129 struct record_entry
*rec
;
2133 struct regcache
*regcache
;
2135 /* We restore the execution log from the open core bfd,
2137 if (core_bfd
== NULL
)
2140 /* "record_restore" can only be called when record list is empty. */
2141 gdb_assert (record_first
.next
== NULL
);
2144 fprintf_unfiltered (gdb_stdlog
, "Restoring recording from core file.\n");
2146 /* Now need to find our special note section. */
2147 osec
= bfd_get_section_by_name (core_bfd
, "null0");
2148 osec_size
= bfd_section_size (core_bfd
, osec
);
2150 fprintf_unfiltered (gdb_stdlog
, "Find precord section %s.\n",
2151 osec
? "succeeded" : "failed");
2155 fprintf_unfiltered (gdb_stdlog
, "%s", bfd_section_name (core_bfd
, osec
));
2157 /* Check the magic code. */
2158 bfdcore_read (core_bfd
, osec
, &magic
, sizeof (magic
), &bfd_offset
);
2159 if (magic
!= RECORD_FILE_MAGIC
)
2160 error (_("Version mis-match or file format error in core file %s."),
2161 bfd_get_filename (core_bfd
));
2163 fprintf_unfiltered (gdb_stdlog
, "\
2164 Reading 4-byte magic cookie RECORD_FILE_MAGIC (0x%s)\n",
2165 phex_nz (netorder32 (magic
), 4));
2167 /* Restore the entries in recfd into record_arch_list_head and
2168 record_arch_list_tail. */
2169 record_arch_list_head
= NULL
;
2170 record_arch_list_tail
= NULL
;
2171 record_insn_num
= 0;
2172 old_cleanups
= make_cleanup (record_arch_list_cleanups
, 0);
2173 regcache
= get_current_regcache ();
2179 uint32_t regnum
, len
, signal
, count
;
2182 /* We are finished when offset reaches osec_size. */
2183 if (bfd_offset
>= osec_size
)
2185 bfdcore_read (core_bfd
, osec
, &rectype
, sizeof (rectype
), &bfd_offset
);
2189 case record_reg
: /* reg */
2190 /* Get register number to regnum. */
2191 bfdcore_read (core_bfd
, osec
, ®num
,
2192 sizeof (regnum
), &bfd_offset
);
2193 regnum
= netorder32 (regnum
);
2195 rec
= record_reg_alloc (regcache
, regnum
);
2198 bfdcore_read (core_bfd
, osec
, record_get_loc (rec
),
2199 rec
->u
.reg
.len
, &bfd_offset
);
2202 fprintf_unfiltered (gdb_stdlog
, "\
2203 Reading register %d (1 plus %lu plus %d bytes)\n",
2205 (unsigned long) sizeof (regnum
),
2209 case record_mem
: /* mem */
2211 bfdcore_read (core_bfd
, osec
, &len
,
2212 sizeof (len
), &bfd_offset
);
2213 len
= netorder32 (len
);
2216 bfdcore_read (core_bfd
, osec
, &addr
,
2217 sizeof (addr
), &bfd_offset
);
2218 addr
= netorder64 (addr
);
2220 rec
= record_mem_alloc (addr
, len
);
2223 bfdcore_read (core_bfd
, osec
, record_get_loc (rec
),
2224 rec
->u
.mem
.len
, &bfd_offset
);
2227 fprintf_unfiltered (gdb_stdlog
, "\
2228 Reading memory %s (1 plus %lu plus %lu plus %d bytes)\n",
2229 paddress (get_current_arch (),
2231 (unsigned long) sizeof (addr
),
2232 (unsigned long) sizeof (len
),
2236 case record_end
: /* end */
2237 rec
= record_end_alloc ();
2240 /* Get signal value. */
2241 bfdcore_read (core_bfd
, osec
, &signal
,
2242 sizeof (signal
), &bfd_offset
);
2243 signal
= netorder32 (signal
);
2244 rec
->u
.end
.sigval
= signal
;
2246 /* Get insn count. */
2247 bfdcore_read (core_bfd
, osec
, &count
,
2248 sizeof (count
), &bfd_offset
);
2249 count
= netorder32 (count
);
2250 rec
->u
.end
.insn_num
= count
;
2251 record_insn_count
= count
+ 1;
2253 fprintf_unfiltered (gdb_stdlog
, "\
2254 Reading record_end (1 + %lu + %lu bytes), offset == %s\n",
2255 (unsigned long) sizeof (signal
),
2256 (unsigned long) sizeof (count
),
2257 paddress (get_current_arch (),
2262 error (_("Bad entry type in core file %s."),
2263 bfd_get_filename (core_bfd
));
2267 /* Add rec to record arch list. */
2268 record_arch_list_add (rec
);
2271 discard_cleanups (old_cleanups
);
2273 /* Add record_arch_list_head to the end of record list. */
2274 record_first
.next
= record_arch_list_head
;
2275 record_arch_list_head
->prev
= &record_first
;
2276 record_arch_list_tail
->next
= NULL
;
2277 record_list
= &record_first
;
2279 /* Update record_insn_max_num. */
2280 if (record_insn_num
> record_insn_max_num
)
2282 record_insn_max_num
= record_insn_num
;
2283 warning (_("Auto increase record/replay buffer limit to %d."),
2284 record_insn_max_num
);
2288 printf_filtered (_("Restored records from core file %s.\n"),
2289 bfd_get_filename (core_bfd
));
2291 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
);
2294 /* bfdcore_write -- write bytes into a core file section. */
2297 bfdcore_write (bfd
*obfd
, asection
*osec
, void *buf
, int len
, int *offset
)
2299 int ret
= bfd_set_section_contents (obfd
, osec
, buf
, *offset
, len
);
2304 error (_("Failed to write %d bytes to core file %s ('%s').\n"),
2305 len
, bfd_get_filename (obfd
),
2306 bfd_errmsg (bfd_get_error ()));
2309 /* Restore the execution log from a file. We use a modified elf
2310 corefile format, with an extra section for our data. */
2313 cmd_record_restore (char *args
, int from_tty
)
2315 core_file_command (args
, from_tty
);
2316 record_open (args
, from_tty
);
2320 record_save_cleanups (void *data
)
2323 char *pathname
= xstrdup (bfd_get_filename (obfd
));
2329 /* Save the execution log to a file. We use a modified elf corefile
2330 format, with an extra section for our data. */
2333 cmd_record_save (char *args
, int from_tty
)
2335 char *recfilename
, recfilename_buffer
[40];
2337 struct record_entry
*cur_record_list
;
2339 struct regcache
*regcache
;
2340 struct gdbarch
*gdbarch
;
2341 struct cleanup
*old_cleanups
;
2342 struct cleanup
*set_cleanups
;
2345 asection
*osec
= NULL
;
2348 if (strcmp (current_target
.to_shortname
, "record") != 0)
2349 error (_("This command can only be used with target 'record'.\n"
2350 "Use 'target record' first.\n"));
2356 /* Default recfile name is "gdb_record.PID". */
2357 snprintf (recfilename_buffer
, sizeof (recfilename_buffer
),
2358 "gdb_record.%d", PIDGET (inferior_ptid
));
2359 recfilename
= recfilename_buffer
;
2362 /* Open the save file. */
2364 fprintf_unfiltered (gdb_stdlog
, "Saving execution log to core file '%s'\n",
2367 /* Open the output file. */
2368 obfd
= create_gcore_bfd (recfilename
);
2369 old_cleanups
= make_cleanup (record_save_cleanups
, obfd
);
2371 /* Save the current record entry to "cur_record_list". */
2372 cur_record_list
= record_list
;
2374 /* Get the values of regcache and gdbarch. */
2375 regcache
= get_current_regcache ();
2376 gdbarch
= get_regcache_arch (regcache
);
2378 /* Disable the GDB operation record. */
2379 set_cleanups
= record_gdb_operation_disable_set ();
2381 /* Reverse execute to the begin of record list. */
2384 /* Check for beginning and end of log. */
2385 if (record_list
== &record_first
)
2388 record_exec_insn (regcache
, gdbarch
, record_list
);
2390 if (record_list
->prev
)
2391 record_list
= record_list
->prev
;
2394 /* Compute the size needed for the extra bfd section. */
2395 save_size
= 4; /* magic cookie */
2396 for (record_list
= record_first
.next
; record_list
;
2397 record_list
= record_list
->next
)
2398 switch (record_list
->type
)
2401 save_size
+= 1 + 4 + 4;
2404 save_size
+= 1 + 4 + record_list
->u
.reg
.len
;
2407 save_size
+= 1 + 4 + 8 + record_list
->u
.mem
.len
;
2411 /* Make the new bfd section. */
2412 osec
= bfd_make_section_anyway_with_flags (obfd
, "precord",
2416 error (_("Failed to create 'precord' section for corefile %s: %s"),
2418 bfd_errmsg (bfd_get_error ()));
2419 bfd_set_section_size (obfd
, osec
, save_size
);
2420 bfd_set_section_vma (obfd
, osec
, 0);
2421 bfd_set_section_alignment (obfd
, osec
, 0);
2422 bfd_section_lma (obfd
, osec
) = 0;
2424 /* Save corefile state. */
2425 write_gcore_file (obfd
);
2427 /* Write out the record log. */
2428 /* Write the magic code. */
2429 magic
= RECORD_FILE_MAGIC
;
2431 fprintf_unfiltered (gdb_stdlog
, "\
2432 Writing 4-byte magic cookie RECORD_FILE_MAGIC (0x%s)\n",
2433 phex_nz (magic
, 4));
2434 bfdcore_write (obfd
, osec
, &magic
, sizeof (magic
), &bfd_offset
);
2436 /* Save the entries to recfd and forward execute to the end of
2438 record_list
= &record_first
;
2442 if (record_list
!= &record_first
)
2445 uint32_t regnum
, len
, signal
, count
;
2448 type
= record_list
->type
;
2449 bfdcore_write (obfd
, osec
, &type
, sizeof (type
), &bfd_offset
);
2451 switch (record_list
->type
)
2453 case record_reg
: /* reg */
2455 fprintf_unfiltered (gdb_stdlog
, "\
2456 Writing register %d (1 plus %lu plus %d bytes)\n",
2457 record_list
->u
.reg
.num
,
2458 (unsigned long) sizeof (regnum
),
2459 record_list
->u
.reg
.len
);
2462 regnum
= netorder32 (record_list
->u
.reg
.num
);
2463 bfdcore_write (obfd
, osec
, ®num
,
2464 sizeof (regnum
), &bfd_offset
);
2467 bfdcore_write (obfd
, osec
, record_get_loc (record_list
),
2468 record_list
->u
.reg
.len
, &bfd_offset
);
2471 case record_mem
: /* mem */
2473 fprintf_unfiltered (gdb_stdlog
, "\
2474 Writing memory %s (1 plus %lu plus %lu plus %d bytes)\n",
2476 record_list
->u
.mem
.addr
),
2477 (unsigned long) sizeof (addr
),
2478 (unsigned long) sizeof (len
),
2479 record_list
->u
.mem
.len
);
2482 len
= netorder32 (record_list
->u
.mem
.len
);
2483 bfdcore_write (obfd
, osec
, &len
, sizeof (len
), &bfd_offset
);
2485 /* Write memaddr. */
2486 addr
= netorder64 (record_list
->u
.mem
.addr
);
2487 bfdcore_write (obfd
, osec
, &addr
,
2488 sizeof (addr
), &bfd_offset
);
2491 bfdcore_write (obfd
, osec
, record_get_loc (record_list
),
2492 record_list
->u
.mem
.len
, &bfd_offset
);
2497 fprintf_unfiltered (gdb_stdlog
, "\
2498 Writing record_end (1 + %lu + %lu bytes)\n",
2499 (unsigned long) sizeof (signal
),
2500 (unsigned long) sizeof (count
));
2501 /* Write signal value. */
2502 signal
= netorder32 (record_list
->u
.end
.sigval
);
2503 bfdcore_write (obfd
, osec
, &signal
,
2504 sizeof (signal
), &bfd_offset
);
2506 /* Write insn count. */
2507 count
= netorder32 (record_list
->u
.end
.insn_num
);
2508 bfdcore_write (obfd
, osec
, &count
,
2509 sizeof (count
), &bfd_offset
);
2514 /* Execute entry. */
2515 record_exec_insn (regcache
, gdbarch
, record_list
);
2517 if (record_list
->next
)
2518 record_list
= record_list
->next
;
2523 /* Reverse execute to cur_record_list. */
2526 /* Check for beginning and end of log. */
2527 if (record_list
== cur_record_list
)
2530 record_exec_insn (regcache
, gdbarch
, record_list
);
2532 if (record_list
->prev
)
2533 record_list
= record_list
->prev
;
2536 do_cleanups (set_cleanups
);
2538 discard_cleanups (old_cleanups
);
2541 printf_filtered (_("Saved core file %s with execution log.\n"),
2545 /* record_goto_insn -- rewind the record log (forward or backward,
2546 depending on DIR) to the given entry, changing the program state
2550 record_goto_insn (struct record_entry
*entry
,
2551 enum exec_direction_kind dir
)
2553 struct cleanup
*set_cleanups
= record_gdb_operation_disable_set ();
2554 struct regcache
*regcache
= get_current_regcache ();
2555 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
2557 /* Assume everything is valid: we will hit the entry,
2558 and we will not hit the end of the recording. */
2560 if (dir
== EXEC_FORWARD
)
2561 record_list
= record_list
->next
;
2565 record_exec_insn (regcache
, gdbarch
, record_list
);
2566 if (dir
== EXEC_REVERSE
)
2567 record_list
= record_list
->prev
;
2569 record_list
= record_list
->next
;
2570 } while (record_list
!= entry
);
2571 do_cleanups (set_cleanups
);
2574 /* "record goto" command. Argument is an instruction number,
2575 as given by "info record".
2577 Rewinds the recording (forward or backward) to the given instruction. */
2580 cmd_record_goto (char *arg
, int from_tty
)
2582 struct record_entry
*p
= NULL
;
2583 ULONGEST target_insn
= 0;
2585 if (arg
== NULL
|| *arg
== '\0')
2586 error (_("Command requires an argument (insn number to go to)."));
2588 if (strncmp (arg
, "start", strlen ("start")) == 0
2589 || strncmp (arg
, "begin", strlen ("begin")) == 0)
2591 /* Special case. Find first insn. */
2592 for (p
= &record_first
; p
!= NULL
; p
= p
->next
)
2593 if (p
->type
== record_end
)
2596 target_insn
= p
->u
.end
.insn_num
;
2598 else if (strncmp (arg
, "end", strlen ("end")) == 0)
2600 /* Special case. Find last insn. */
2601 for (p
= record_list
; p
->next
!= NULL
; p
= p
->next
)
2603 for (; p
!= NULL
; p
= p
->prev
)
2604 if (p
->type
== record_end
)
2607 target_insn
= p
->u
.end
.insn_num
;
2611 /* General case. Find designated insn. */
2612 target_insn
= parse_and_eval_long (arg
);
2614 for (p
= &record_first
; p
!= NULL
; p
= p
->next
)
2615 if (p
->type
== record_end
&& p
->u
.end
.insn_num
== target_insn
)
2620 error (_("Target insn '%s' not found."), arg
);
2621 else if (p
== record_list
)
2622 error (_("Already at insn '%s'."), arg
);
2623 else if (p
->u
.end
.insn_num
> record_list
->u
.end
.insn_num
)
2625 printf_filtered (_("Go forward to insn number %s\n"),
2626 pulongest (target_insn
));
2627 record_goto_insn (p
, EXEC_FORWARD
);
2631 printf_filtered (_("Go backward to insn number %s\n"),
2632 pulongest (target_insn
));
2633 record_goto_insn (p
, EXEC_REVERSE
);
2635 registers_changed ();
2636 reinit_frame_cache ();
2637 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
);
2641 _initialize_record (void)
2643 struct cmd_list_element
*c
;
2645 /* Init record_first. */
2646 record_first
.prev
= NULL
;
2647 record_first
.next
= NULL
;
2648 record_first
.type
= record_end
;
2651 add_target (&record_ops
);
2652 init_record_core_ops ();
2653 add_target (&record_core_ops
);
2655 add_setshow_zinteger_cmd ("record", no_class
, &record_debug
,
2656 _("Set debugging of record/replay feature."),
2657 _("Show debugging of record/replay feature."),
2658 _("When enabled, debugging output for "
2659 "record/replay feature is displayed."),
2660 NULL
, show_record_debug
, &setdebuglist
,
2663 c
= add_prefix_cmd ("record", class_obscure
, cmd_record_start
,
2664 _("Abbreviated form of \"target record\" command."),
2665 &record_cmdlist
, "record ", 0, &cmdlist
);
2666 set_cmd_completer (c
, filename_completer
);
2668 add_com_alias ("rec", "record", class_obscure
, 1);
2669 add_prefix_cmd ("record", class_support
, set_record_command
,
2670 _("Set record options"), &set_record_cmdlist
,
2671 "set record ", 0, &setlist
);
2672 add_alias_cmd ("rec", "record", class_obscure
, 1, &setlist
);
2673 add_prefix_cmd ("record", class_support
, show_record_command
,
2674 _("Show record options"), &show_record_cmdlist
,
2675 "show record ", 0, &showlist
);
2676 add_alias_cmd ("rec", "record", class_obscure
, 1, &showlist
);
2677 add_prefix_cmd ("record", class_support
, info_record_command
,
2678 _("Info record options"), &info_record_cmdlist
,
2679 "info record ", 0, &infolist
);
2680 add_alias_cmd ("rec", "record", class_obscure
, 1, &infolist
);
2682 c
= add_cmd ("save", class_obscure
, cmd_record_save
,
2683 _("Save the execution log to a file.\n\
2684 Argument is optional filename.\n\
2685 Default filename is 'gdb_record.<process_id>'."),
2687 set_cmd_completer (c
, filename_completer
);
2689 c
= add_cmd ("restore", class_obscure
, cmd_record_restore
,
2690 _("Restore the execution log from a file.\n\
2691 Argument is filename. File must be created with 'record save'."),
2693 set_cmd_completer (c
, filename_completer
);
2695 add_cmd ("delete", class_obscure
, cmd_record_delete
,
2696 _("Delete the rest of execution log and start recording it anew."),
2698 add_alias_cmd ("d", "delete", class_obscure
, 1, &record_cmdlist
);
2699 add_alias_cmd ("del", "delete", class_obscure
, 1, &record_cmdlist
);
2701 add_cmd ("stop", class_obscure
, cmd_record_stop
,
2702 _("Stop the record/replay target."),
2704 add_alias_cmd ("s", "stop", class_obscure
, 1, &record_cmdlist
);
2706 /* Record instructions number limit command. */
2707 add_setshow_boolean_cmd ("stop-at-limit", no_class
,
2708 &record_stop_at_limit
, _("\
2709 Set whether record/replay stops when record/replay buffer becomes full."), _("\
2710 Show whether record/replay stops when record/replay buffer becomes full."), _("\
2712 When ON, if the record/replay buffer becomes full, ask user what to do.\n\
2713 When OFF, if the record/replay buffer becomes full,\n\
2714 delete the oldest recorded instruction to make room for each new one."),
2716 &set_record_cmdlist
, &show_record_cmdlist
);
2717 add_setshow_uinteger_cmd ("insn-number-max", no_class
,
2718 &record_insn_max_num
,
2719 _("Set record/replay buffer limit."),
2720 _("Show record/replay buffer limit."), _("\
2721 Set the maximum number of instructions to be stored in the\n\
2722 record/replay buffer. Zero means unlimited. Default is 200000."),
2723 set_record_insn_max_num
,
2724 NULL
, &set_record_cmdlist
, &show_record_cmdlist
);
2726 add_cmd ("goto", class_obscure
, cmd_record_goto
, _("\
2727 Restore the program to its state at instruction number N.\n\
2728 Argument is instruction number, as shown by 'info record'."),