1 /* Process record and replay target for GDB, the GNU debugger.
3 Copyright (C) 2013-2021 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"
25 #include "event-top.h"
26 #include "completer.h"
27 #include "arch-utils.h"
31 #include "record-full.h"
34 #include "gdbsupport/event-loop.h"
37 #include "observable.h"
39 #include "gdbsupport/gdb_unlinker.h"
40 #include "gdbsupport/byte-vector.h"
41 #include "async-event.h"
45 /* This module implements "target record-full", also known as "process
46 record and replay". This target sits on top of a "normal" target
47 (a target that "has execution"), and provides a record and replay
48 functionality, including reverse debugging.
50 Target record has two modes: recording, and replaying.
52 In record mode, we intercept the resume and wait methods.
53 Whenever gdb resumes the target, we run the target in single step
54 mode, and we build up an execution log in which, for each executed
55 instruction, we record all changes in memory and register state.
56 This is invisible to the user, to whom it just looks like an
57 ordinary debugging session (except for performance degradation).
59 In replay mode, instead of actually letting the inferior run as a
60 process, we simulate its execution by playing back the recorded
61 execution log. For each instruction in the log, we simulate the
62 instruction's side effects by duplicating the changes that it would
63 have made on memory and registers. */
65 #define DEFAULT_RECORD_FULL_INSN_MAX_NUM 200000
67 #define RECORD_FULL_IS_REPLAY \
68 (record_full_list->next || ::execution_direction == EXEC_REVERSE)
70 #define RECORD_FULL_FILE_MAGIC netorder32(0x20091016)
72 /* These are the core structs of the process record functionality.
74 A record_full_entry is a record of the value change of a register
75 ("record_full_reg") or a part of memory ("record_full_mem"). And each
76 instruction must have a struct record_full_entry ("record_full_end")
77 that indicates that this is the last struct record_full_entry of this
80 Each struct record_full_entry is linked to "record_full_list" by "prev"
81 and "next" pointers. */
83 struct record_full_mem_entry
87 /* Set this flag if target memory for this entry
88 can no longer be accessed. */
89 int mem_entry_not_accessible
;
93 gdb_byte buf
[sizeof (gdb_byte
*)];
97 struct record_full_reg_entry
104 gdb_byte buf
[2 * sizeof (gdb_byte
*)];
108 struct record_full_end_entry
110 enum gdb_signal sigval
;
114 enum record_full_type
121 /* This is the data structure that makes up the execution log.
123 The execution log consists of a single linked list of entries
124 of type "struct record_full_entry". It is doubly linked so that it
125 can be traversed in either direction.
127 The start of the list is anchored by a struct called
128 "record_full_first". The pointer "record_full_list" either points
129 to the last entry that was added to the list (in record mode), or to
130 the next entry in the list that will be executed (in replay mode).
132 Each list element (struct record_full_entry), in addition to next
133 and prev pointers, consists of a union of three entry types: mem,
134 reg, and end. A field called "type" determines which entry type is
135 represented by a given list element.
137 Each instruction that is added to the execution log is represented
138 by a variable number of list elements ('entries'). The instruction
139 will have one "reg" entry for each register that is changed by
140 executing the instruction (including the PC in every case). It
141 will also have one "mem" entry for each memory change. Finally,
142 each instruction will have an "end" entry that separates it from
143 the changes associated with the next instruction. */
145 struct record_full_entry
147 struct record_full_entry
*prev
;
148 struct record_full_entry
*next
;
149 enum record_full_type type
;
153 struct record_full_reg_entry reg
;
155 struct record_full_mem_entry mem
;
157 struct record_full_end_entry end
;
161 /* If true, query if PREC cannot record memory
162 change of next instruction. */
163 bool record_full_memory_query
= false;
165 struct record_full_core_buf_entry
167 struct record_full_core_buf_entry
*prev
;
168 struct target_section
*p
;
172 /* Record buf with core target. */
173 static detached_regcache
*record_full_core_regbuf
= NULL
;
174 static target_section_table record_full_core_sections
;
175 static struct record_full_core_buf_entry
*record_full_core_buf_list
= NULL
;
177 /* The following variables are used for managing the linked list that
178 represents the execution log.
180 record_full_first is the anchor that holds down the beginning of
183 record_full_list serves two functions:
184 1) In record mode, it anchors the end of the list.
185 2) In replay mode, it traverses the list and points to
186 the next instruction that must be emulated.
188 record_full_arch_list_head and record_full_arch_list_tail are used
189 to manage a separate list, which is used to build up the change
190 elements of the currently executing instruction during record mode.
191 When this instruction has been completely annotated in the "arch
192 list", it will be appended to the main execution log. */
194 static struct record_full_entry record_full_first
;
195 static struct record_full_entry
*record_full_list
= &record_full_first
;
196 static struct record_full_entry
*record_full_arch_list_head
= NULL
;
197 static struct record_full_entry
*record_full_arch_list_tail
= NULL
;
199 /* true ask user. false auto delete the last struct record_full_entry. */
200 static bool record_full_stop_at_limit
= true;
201 /* Maximum allowed number of insns in execution log. */
202 static unsigned int record_full_insn_max_num
203 = DEFAULT_RECORD_FULL_INSN_MAX_NUM
;
204 /* Actual count of insns presently in execution log. */
205 static unsigned int record_full_insn_num
= 0;
206 /* Count of insns logged so far (may be larger
207 than count of insns presently in execution log). */
208 static ULONGEST record_full_insn_count
;
210 static const char record_longname
[]
211 = N_("Process record and replay target");
212 static const char record_doc
[]
213 = N_("Log program while executing and replay execution from log.");
215 /* Base class implementing functionality common to both the
216 "record-full" and "record-core" targets. */
218 class record_full_base_target
: public target_ops
221 const target_info
&info () const override
= 0;
223 strata
stratum () const override
{ return record_stratum
; }
225 void close () override
;
226 void async (int) override
;
227 ptid_t
wait (ptid_t
, struct target_waitstatus
*, target_wait_flags
) override
;
228 bool stopped_by_watchpoint () override
;
229 bool stopped_data_address (CORE_ADDR
*) override
;
231 bool stopped_by_sw_breakpoint () override
;
232 bool supports_stopped_by_sw_breakpoint () override
;
234 bool stopped_by_hw_breakpoint () override
;
235 bool supports_stopped_by_hw_breakpoint () override
;
237 bool can_execute_reverse () override
;
239 /* Add bookmark target methods. */
240 gdb_byte
*get_bookmark (const char *, int) override
;
241 void goto_bookmark (const gdb_byte
*, int) override
;
242 enum exec_direction_kind
execution_direction () override
;
243 enum record_method
record_method (ptid_t ptid
) override
;
244 void info_record () override
;
245 void save_record (const char *filename
) override
;
246 bool supports_delete_record () override
;
247 void delete_record () override
;
248 bool record_is_replaying (ptid_t ptid
) override
;
249 bool record_will_replay (ptid_t ptid
, int dir
) override
;
250 void record_stop_replaying () override
;
251 void goto_record_begin () override
;
252 void goto_record_end () override
;
253 void goto_record (ULONGEST insn
) override
;
256 /* The "record-full" target. */
258 static const target_info record_full_target_info
= {
264 class record_full_target final
: public record_full_base_target
267 const target_info
&info () const override
268 { return record_full_target_info
; }
270 void resume (ptid_t
, int, enum gdb_signal
) override
;
271 void disconnect (const char *, int) override
;
272 void detach (inferior
*, int) override
;
273 void mourn_inferior () override
;
274 void kill () override
;
275 void store_registers (struct regcache
*, int) override
;
276 enum target_xfer_status
xfer_partial (enum target_object object
,
279 const gdb_byte
*writebuf
,
280 ULONGEST offset
, ULONGEST len
,
281 ULONGEST
*xfered_len
) override
;
282 int insert_breakpoint (struct gdbarch
*,
283 struct bp_target_info
*) override
;
284 int remove_breakpoint (struct gdbarch
*,
285 struct bp_target_info
*,
286 enum remove_bp_reason
) override
;
289 /* The "record-core" target. */
291 static const target_info record_full_core_target_info
= {
297 class record_full_core_target final
: public record_full_base_target
300 const target_info
&info () const override
301 { return record_full_core_target_info
; }
303 void resume (ptid_t
, int, enum gdb_signal
) override
;
304 void disconnect (const char *, int) override
;
305 void kill () override
;
306 void fetch_registers (struct regcache
*regcache
, int regno
) override
;
307 void prepare_to_store (struct regcache
*regcache
) override
;
308 void store_registers (struct regcache
*, int) override
;
309 enum target_xfer_status
xfer_partial (enum target_object object
,
312 const gdb_byte
*writebuf
,
313 ULONGEST offset
, ULONGEST len
,
314 ULONGEST
*xfered_len
) override
;
315 int insert_breakpoint (struct gdbarch
*,
316 struct bp_target_info
*) override
;
317 int remove_breakpoint (struct gdbarch
*,
318 struct bp_target_info
*,
319 enum remove_bp_reason
) override
;
321 bool has_execution (inferior
*inf
) override
;
324 static record_full_target record_full_ops
;
325 static record_full_core_target record_full_core_ops
;
328 record_full_target::detach (inferior
*inf
, int from_tty
)
330 record_detach (this, inf
, from_tty
);
334 record_full_target::disconnect (const char *args
, int from_tty
)
336 record_disconnect (this, args
, from_tty
);
340 record_full_core_target::disconnect (const char *args
, int from_tty
)
342 record_disconnect (this, args
, from_tty
);
346 record_full_target::mourn_inferior ()
348 record_mourn_inferior (this);
352 record_full_target::kill ()
357 /* See record-full.h. */
360 record_full_is_used (void)
362 struct target_ops
*t
;
364 t
= find_record_target ();
365 return (t
== &record_full_ops
366 || t
== &record_full_core_ops
);
370 /* Command lists for "set/show record full". */
371 static struct cmd_list_element
*set_record_full_cmdlist
;
372 static struct cmd_list_element
*show_record_full_cmdlist
;
374 /* Command list for "record full". */
375 static struct cmd_list_element
*record_full_cmdlist
;
377 static void record_full_goto_insn (struct record_full_entry
*entry
,
378 enum exec_direction_kind dir
);
380 /* Alloc and free functions for record_full_reg, record_full_mem, and
381 record_full_end entries. */
383 /* Alloc a record_full_reg record entry. */
385 static inline struct record_full_entry
*
386 record_full_reg_alloc (struct regcache
*regcache
, int regnum
)
388 struct record_full_entry
*rec
;
389 struct gdbarch
*gdbarch
= regcache
->arch ();
391 rec
= XCNEW (struct record_full_entry
);
392 rec
->type
= record_full_reg
;
393 rec
->u
.reg
.num
= regnum
;
394 rec
->u
.reg
.len
= register_size (gdbarch
, regnum
);
395 if (rec
->u
.reg
.len
> sizeof (rec
->u
.reg
.u
.buf
))
396 rec
->u
.reg
.u
.ptr
= (gdb_byte
*) xmalloc (rec
->u
.reg
.len
);
401 /* Free a record_full_reg record entry. */
404 record_full_reg_release (struct record_full_entry
*rec
)
406 gdb_assert (rec
->type
== record_full_reg
);
407 if (rec
->u
.reg
.len
> sizeof (rec
->u
.reg
.u
.buf
))
408 xfree (rec
->u
.reg
.u
.ptr
);
412 /* Alloc a record_full_mem record entry. */
414 static inline struct record_full_entry
*
415 record_full_mem_alloc (CORE_ADDR addr
, int len
)
417 struct record_full_entry
*rec
;
419 rec
= XCNEW (struct record_full_entry
);
420 rec
->type
= record_full_mem
;
421 rec
->u
.mem
.addr
= addr
;
422 rec
->u
.mem
.len
= len
;
423 if (rec
->u
.mem
.len
> sizeof (rec
->u
.mem
.u
.buf
))
424 rec
->u
.mem
.u
.ptr
= (gdb_byte
*) xmalloc (len
);
429 /* Free a record_full_mem record entry. */
432 record_full_mem_release (struct record_full_entry
*rec
)
434 gdb_assert (rec
->type
== record_full_mem
);
435 if (rec
->u
.mem
.len
> sizeof (rec
->u
.mem
.u
.buf
))
436 xfree (rec
->u
.mem
.u
.ptr
);
440 /* Alloc a record_full_end record entry. */
442 static inline struct record_full_entry
*
443 record_full_end_alloc (void)
445 struct record_full_entry
*rec
;
447 rec
= XCNEW (struct record_full_entry
);
448 rec
->type
= record_full_end
;
453 /* Free a record_full_end record entry. */
456 record_full_end_release (struct record_full_entry
*rec
)
461 /* Free one record entry, any type.
462 Return entry->type, in case caller wants to know. */
464 static inline enum record_full_type
465 record_full_entry_release (struct record_full_entry
*rec
)
467 enum record_full_type type
= rec
->type
;
470 case record_full_reg
:
471 record_full_reg_release (rec
);
473 case record_full_mem
:
474 record_full_mem_release (rec
);
476 case record_full_end
:
477 record_full_end_release (rec
);
483 /* Free all record entries in list pointed to by REC. */
486 record_full_list_release (struct record_full_entry
*rec
)
497 record_full_entry_release (rec
->next
);
500 if (rec
== &record_full_first
)
502 record_full_insn_num
= 0;
503 record_full_first
.next
= NULL
;
506 record_full_entry_release (rec
);
509 /* Free all record entries forward of the given list position. */
512 record_full_list_release_following (struct record_full_entry
*rec
)
514 struct record_full_entry
*tmp
= rec
->next
;
520 if (record_full_entry_release (tmp
) == record_full_end
)
522 record_full_insn_num
--;
523 record_full_insn_count
--;
529 /* Delete the first instruction from the beginning of the log, to make
530 room for adding a new instruction at the end of the log.
532 Note -- this function does not modify record_full_insn_num. */
535 record_full_list_release_first (void)
537 struct record_full_entry
*tmp
;
539 if (!record_full_first
.next
)
542 /* Loop until a record_full_end. */
545 /* Cut record_full_first.next out of the linked list. */
546 tmp
= record_full_first
.next
;
547 record_full_first
.next
= tmp
->next
;
548 tmp
->next
->prev
= &record_full_first
;
550 /* tmp is now isolated, and can be deleted. */
551 if (record_full_entry_release (tmp
) == record_full_end
)
552 break; /* End loop at first record_full_end. */
554 if (!record_full_first
.next
)
556 gdb_assert (record_full_insn_num
== 1);
557 break; /* End loop when list is empty. */
562 /* Add a struct record_full_entry to record_full_arch_list. */
565 record_full_arch_list_add (struct record_full_entry
*rec
)
567 if (record_debug
> 1)
568 fprintf_unfiltered (gdb_stdlog
,
569 "Process record: record_full_arch_list_add %s.\n",
570 host_address_to_string (rec
));
572 if (record_full_arch_list_tail
)
574 record_full_arch_list_tail
->next
= rec
;
575 rec
->prev
= record_full_arch_list_tail
;
576 record_full_arch_list_tail
= rec
;
580 record_full_arch_list_head
= rec
;
581 record_full_arch_list_tail
= rec
;
585 /* Return the value storage location of a record entry. */
586 static inline gdb_byte
*
587 record_full_get_loc (struct record_full_entry
*rec
)
590 case record_full_mem
:
591 if (rec
->u
.mem
.len
> sizeof (rec
->u
.mem
.u
.buf
))
592 return rec
->u
.mem
.u
.ptr
;
594 return rec
->u
.mem
.u
.buf
;
595 case record_full_reg
:
596 if (rec
->u
.reg
.len
> sizeof (rec
->u
.reg
.u
.buf
))
597 return rec
->u
.reg
.u
.ptr
;
599 return rec
->u
.reg
.u
.buf
;
600 case record_full_end
:
602 gdb_assert_not_reached ("unexpected record_full_entry type");
607 /* Record the value of a register NUM to record_full_arch_list. */
610 record_full_arch_list_add_reg (struct regcache
*regcache
, int regnum
)
612 struct record_full_entry
*rec
;
614 if (record_debug
> 1)
615 fprintf_unfiltered (gdb_stdlog
,
616 "Process record: add register num = %d to "
620 rec
= record_full_reg_alloc (regcache
, regnum
);
622 regcache
->raw_read (regnum
, record_full_get_loc (rec
));
624 record_full_arch_list_add (rec
);
629 /* Record the value of a region of memory whose address is ADDR and
630 length is LEN to record_full_arch_list. */
633 record_full_arch_list_add_mem (CORE_ADDR addr
, int len
)
635 struct record_full_entry
*rec
;
637 if (record_debug
> 1)
638 fprintf_unfiltered (gdb_stdlog
,
639 "Process record: add mem addr = %s len = %d to "
641 paddress (target_gdbarch (), addr
), len
);
643 if (!addr
) /* FIXME: Why? Some arch must permit it... */
646 rec
= record_full_mem_alloc (addr
, len
);
648 if (record_read_memory (target_gdbarch (), addr
,
649 record_full_get_loc (rec
), len
))
651 record_full_mem_release (rec
);
655 record_full_arch_list_add (rec
);
660 /* Add a record_full_end type struct record_full_entry to
661 record_full_arch_list. */
664 record_full_arch_list_add_end (void)
666 struct record_full_entry
*rec
;
668 if (record_debug
> 1)
669 fprintf_unfiltered (gdb_stdlog
,
670 "Process record: add end to arch list.\n");
672 rec
= record_full_end_alloc ();
673 rec
->u
.end
.sigval
= GDB_SIGNAL_0
;
674 rec
->u
.end
.insn_num
= ++record_full_insn_count
;
676 record_full_arch_list_add (rec
);
682 record_full_check_insn_num (void)
684 if (record_full_insn_num
== record_full_insn_max_num
)
686 /* Ask user what to do. */
687 if (record_full_stop_at_limit
)
689 if (!yquery (_("Do you want to auto delete previous execution "
690 "log entries when record/replay buffer becomes "
691 "full (record full stop-at-limit)?")))
692 error (_("Process record: stopped by user."));
693 record_full_stop_at_limit
= 0;
698 /* Before inferior step (when GDB record the running message, inferior
699 only can step), GDB will call this function to record the values to
700 record_full_list. This function will call gdbarch_process_record to
701 record the running message of inferior and set them to
702 record_full_arch_list, and add it to record_full_list. */
705 record_full_message (struct regcache
*regcache
, enum gdb_signal signal
)
708 struct gdbarch
*gdbarch
= regcache
->arch ();
712 record_full_arch_list_head
= NULL
;
713 record_full_arch_list_tail
= NULL
;
715 /* Check record_full_insn_num. */
716 record_full_check_insn_num ();
718 /* If gdb sends a signal value to target_resume,
719 save it in the 'end' field of the previous instruction.
721 Maybe process record should record what really happened,
722 rather than what gdb pretends has happened.
724 So if Linux delivered the signal to the child process during
725 the record mode, we will record it and deliver it again in
728 If user says "ignore this signal" during the record mode, then
729 it will be ignored again during the replay mode (no matter if
730 the user says something different, like "deliver this signal"
731 during the replay mode).
733 User should understand that nothing he does during the replay
734 mode will change the behavior of the child. If he tries,
735 then that is a user error.
737 But we should still deliver the signal to gdb during the replay,
738 if we delivered it during the recording. Therefore we should
739 record the signal during record_full_wait, not
740 record_full_resume. */
741 if (record_full_list
!= &record_full_first
) /* FIXME better way
744 gdb_assert (record_full_list
->type
== record_full_end
);
745 record_full_list
->u
.end
.sigval
= signal
;
748 if (signal
== GDB_SIGNAL_0
749 || !gdbarch_process_record_signal_p (gdbarch
))
750 ret
= gdbarch_process_record (gdbarch
,
752 regcache_read_pc (regcache
));
754 ret
= gdbarch_process_record_signal (gdbarch
,
759 error (_("Process record: inferior program stopped."));
761 error (_("Process record: failed to record execution log."));
763 catch (const gdb_exception
&ex
)
765 record_full_list_release (record_full_arch_list_tail
);
769 record_full_list
->next
= record_full_arch_list_head
;
770 record_full_arch_list_head
->prev
= record_full_list
;
771 record_full_list
= record_full_arch_list_tail
;
773 if (record_full_insn_num
== record_full_insn_max_num
)
774 record_full_list_release_first ();
776 record_full_insn_num
++;
780 record_full_message_wrapper_safe (struct regcache
*regcache
,
781 enum gdb_signal signal
)
785 record_full_message (regcache
, signal
);
787 catch (const gdb_exception
&ex
)
789 exception_print (gdb_stderr
, ex
);
796 /* Set to 1 if record_full_store_registers and record_full_xfer_partial
797 doesn't need record. */
799 static int record_full_gdb_operation_disable
= 0;
801 scoped_restore_tmpl
<int>
802 record_full_gdb_operation_disable_set (void)
804 return make_scoped_restore (&record_full_gdb_operation_disable
, 1);
807 /* Flag set to TRUE for target_stopped_by_watchpoint. */
808 static enum target_stop_reason record_full_stop_reason
809 = TARGET_STOPPED_BY_NO_REASON
;
811 /* Execute one instruction from the record log. Each instruction in
812 the log will be represented by an arbitrary sequence of register
813 entries and memory entries, followed by an 'end' entry. */
816 record_full_exec_insn (struct regcache
*regcache
,
817 struct gdbarch
*gdbarch
,
818 struct record_full_entry
*entry
)
822 case record_full_reg
: /* reg */
824 gdb::byte_vector
reg (entry
->u
.reg
.len
);
826 if (record_debug
> 1)
827 fprintf_unfiltered (gdb_stdlog
,
828 "Process record: record_full_reg %s to "
829 "inferior num = %d.\n",
830 host_address_to_string (entry
),
833 regcache
->cooked_read (entry
->u
.reg
.num
, reg
.data ());
834 regcache
->cooked_write (entry
->u
.reg
.num
, record_full_get_loc (entry
));
835 memcpy (record_full_get_loc (entry
), reg
.data (), entry
->u
.reg
.len
);
839 case record_full_mem
: /* mem */
841 /* Nothing to do if the entry is flagged not_accessible. */
842 if (!entry
->u
.mem
.mem_entry_not_accessible
)
844 gdb::byte_vector
mem (entry
->u
.mem
.len
);
846 if (record_debug
> 1)
847 fprintf_unfiltered (gdb_stdlog
,
848 "Process record: record_full_mem %s to "
849 "inferior addr = %s len = %d.\n",
850 host_address_to_string (entry
),
851 paddress (gdbarch
, entry
->u
.mem
.addr
),
854 if (record_read_memory (gdbarch
,
855 entry
->u
.mem
.addr
, mem
.data (),
857 entry
->u
.mem
.mem_entry_not_accessible
= 1;
860 if (target_write_memory (entry
->u
.mem
.addr
,
861 record_full_get_loc (entry
),
864 entry
->u
.mem
.mem_entry_not_accessible
= 1;
866 warning (_("Process record: error writing memory at "
867 "addr = %s len = %d."),
868 paddress (gdbarch
, entry
->u
.mem
.addr
),
873 memcpy (record_full_get_loc (entry
), mem
.data (),
876 /* We've changed memory --- check if a hardware
877 watchpoint should trap. Note that this
878 presently assumes the target beneath supports
879 continuable watchpoints. On non-continuable
880 watchpoints target, we'll want to check this
881 _before_ actually doing the memory change, and
882 not doing the change at all if the watchpoint
884 if (hardware_watchpoint_inserted_in_range
885 (regcache
->aspace (),
886 entry
->u
.mem
.addr
, entry
->u
.mem
.len
))
887 record_full_stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
896 static void record_full_restore (void);
898 /* Asynchronous signal handle registered as event loop source for when
899 we have pending events ready to be passed to the core. */
901 static struct async_event_handler
*record_full_async_inferior_event_token
;
904 record_full_async_inferior_event_handler (gdb_client_data data
)
906 inferior_event_handler (INF_REG_EVENT
);
909 /* Open the process record target for 'core' files. */
912 record_full_core_open_1 (const char *name
, int from_tty
)
914 struct regcache
*regcache
= get_current_regcache ();
915 int regnum
= gdbarch_num_regs (regcache
->arch ());
918 /* Get record_full_core_regbuf. */
919 target_fetch_registers (regcache
, -1);
920 record_full_core_regbuf
= new detached_regcache (regcache
->arch (), false);
922 for (i
= 0; i
< regnum
; i
++)
923 record_full_core_regbuf
->raw_supply (i
, *regcache
);
925 record_full_core_sections
= build_section_table (core_bfd
);
927 push_target (&record_full_core_ops
);
928 record_full_restore ();
931 /* Open the process record target for 'live' processes. */
934 record_full_open_1 (const char *name
, int from_tty
)
937 fprintf_unfiltered (gdb_stdlog
, "Process record: record_full_open_1\n");
940 if (!target_has_execution ())
941 error (_("Process record: the program is not being run."));
943 error (_("Process record target can't debug inferior in non-stop mode "
946 if (!gdbarch_process_record_p (target_gdbarch ()))
947 error (_("Process record: the current architecture doesn't support "
948 "record function."));
950 push_target (&record_full_ops
);
953 static void record_full_init_record_breakpoints (void);
955 /* Open the process record target. */
958 record_full_open (const char *name
, int from_tty
)
961 fprintf_unfiltered (gdb_stdlog
, "Process record: record_full_open\n");
966 record_full_insn_num
= 0;
967 record_full_insn_count
= 0;
968 record_full_list
= &record_full_first
;
969 record_full_list
->next
= NULL
;
972 record_full_core_open_1 (name
, from_tty
);
974 record_full_open_1 (name
, from_tty
);
976 /* Register extra event sources in the event loop. */
977 record_full_async_inferior_event_token
978 = create_async_event_handler (record_full_async_inferior_event_handler
,
979 NULL
, "record-full");
981 record_full_init_record_breakpoints ();
983 gdb::observers::record_changed
.notify (current_inferior (), 1, "full", NULL
);
986 /* "close" target method. Close the process record target. */
989 record_full_base_target::close ()
991 struct record_full_core_buf_entry
*entry
;
994 fprintf_unfiltered (gdb_stdlog
, "Process record: record_full_close\n");
996 record_full_list_release (record_full_list
);
998 /* Release record_full_core_regbuf. */
999 if (record_full_core_regbuf
)
1001 delete record_full_core_regbuf
;
1002 record_full_core_regbuf
= NULL
;
1005 /* Release record_full_core_buf_list. */
1006 while (record_full_core_buf_list
)
1008 entry
= record_full_core_buf_list
;
1009 record_full_core_buf_list
= record_full_core_buf_list
->prev
;
1013 if (record_full_async_inferior_event_token
)
1014 delete_async_event_handler (&record_full_async_inferior_event_token
);
1017 /* "async" target method. */
1020 record_full_base_target::async (int enable
)
1023 mark_async_event_handler (record_full_async_inferior_event_token
);
1025 clear_async_event_handler (record_full_async_inferior_event_token
);
1027 beneath ()->async (enable
);
1030 /* The PTID and STEP arguments last passed to
1031 record_full_target::resume. */
1032 static ptid_t record_full_resume_ptid
= null_ptid
;
1033 static int record_full_resume_step
= 0;
1035 /* True if we've been resumed, and so each record_full_wait call should
1036 advance execution. If this is false, record_full_wait will return a
1037 TARGET_WAITKIND_IGNORE. */
1038 static int record_full_resumed
= 0;
1040 /* The execution direction of the last resume we got. This is
1041 necessary for async mode. Vis (order is not strictly accurate):
1043 1. user has the global execution direction set to forward
1044 2. user does a reverse-step command
1045 3. record_full_resume is called with global execution direction
1046 temporarily switched to reverse
1047 4. GDB's execution direction is reverted back to forward
1048 5. target record notifies event loop there's an event to handle
1049 6. infrun asks the target which direction was it going, and switches
1050 the global execution direction accordingly (to reverse)
1051 7. infrun polls an event out of the record target, and handles it
1052 8. GDB goes back to the event loop, and goto #4.
1054 static enum exec_direction_kind record_full_execution_dir
= EXEC_FORWARD
;
1056 /* "resume" target method. Resume the process record target. */
1059 record_full_target::resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
1061 record_full_resume_ptid
= inferior_ptid
;
1062 record_full_resume_step
= step
;
1063 record_full_resumed
= 1;
1064 record_full_execution_dir
= ::execution_direction
;
1066 if (!RECORD_FULL_IS_REPLAY
)
1068 struct gdbarch
*gdbarch
= target_thread_architecture (ptid
);
1070 record_full_message (get_current_regcache (), signal
);
1074 /* This is not hard single step. */
1075 if (!gdbarch_software_single_step_p (gdbarch
))
1077 /* This is a normal continue. */
1082 /* This arch supports soft single step. */
1083 if (thread_has_single_step_breakpoints_set (inferior_thread ()))
1085 /* This is a soft single step. */
1086 record_full_resume_step
= 1;
1089 step
= !insert_single_step_breakpoints (gdbarch
);
1093 /* Make sure the target beneath reports all signals. */
1094 target_pass_signals ({});
1096 this->beneath ()->resume (ptid
, step
, signal
);
1099 /* We are about to start executing the inferior (or simulate it),
1100 let's register it with the event loop. */
1101 if (target_can_async_p ())
1105 static int record_full_get_sig
= 0;
1107 /* SIGINT signal handler, registered by "wait" method. */
1110 record_full_sig_handler (int signo
)
1113 fprintf_unfiltered (gdb_stdlog
, "Process record: get a signal\n");
1115 /* It will break the running inferior in replay mode. */
1116 record_full_resume_step
= 1;
1118 /* It will let record_full_wait set inferior status to get the signal
1120 record_full_get_sig
= 1;
1123 /* "wait" target method for process record target.
1125 In record mode, the target is always run in singlestep mode
1126 (even when gdb says to continue). The wait method intercepts
1127 the stop events and determines which ones are to be passed on to
1128 gdb. Most stop events are just singlestep events that gdb is not
1129 to know about, so the wait method just records them and keeps
1132 In replay mode, this function emulates the recorded execution log,
1133 one instruction at a time (forward or backward), and determines
1137 record_full_wait_1 (struct target_ops
*ops
,
1138 ptid_t ptid
, struct target_waitstatus
*status
,
1139 target_wait_flags options
)
1141 scoped_restore restore_operation_disable
1142 = record_full_gdb_operation_disable_set ();
1145 fprintf_unfiltered (gdb_stdlog
,
1146 "Process record: record_full_wait "
1147 "record_full_resume_step = %d, "
1148 "record_full_resumed = %d, direction=%s\n",
1149 record_full_resume_step
, record_full_resumed
,
1150 record_full_execution_dir
== EXEC_FORWARD
1151 ? "forward" : "reverse");
1153 if (!record_full_resumed
)
1155 gdb_assert ((options
& TARGET_WNOHANG
) != 0);
1157 /* No interesting event. */
1158 status
->kind
= TARGET_WAITKIND_IGNORE
;
1159 return minus_one_ptid
;
1162 record_full_get_sig
= 0;
1163 signal (SIGINT
, record_full_sig_handler
);
1165 record_full_stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
1167 if (!RECORD_FULL_IS_REPLAY
&& ops
!= &record_full_core_ops
)
1169 if (record_full_resume_step
)
1171 /* This is a single step. */
1172 return ops
->beneath ()->wait (ptid
, status
, options
);
1176 /* This is not a single step. */
1179 struct gdbarch
*gdbarch
1180 = target_thread_architecture (record_full_resume_ptid
);
1184 ret
= ops
->beneath ()->wait (ptid
, status
, options
);
1185 if (status
->kind
== TARGET_WAITKIND_IGNORE
)
1188 fprintf_unfiltered (gdb_stdlog
,
1189 "Process record: record_full_wait "
1190 "target beneath not done yet\n");
1194 for (thread_info
*tp
: all_non_exited_threads ())
1195 delete_single_step_breakpoints (tp
);
1197 if (record_full_resume_step
)
1200 /* Is this a SIGTRAP? */
1201 if (status
->kind
== TARGET_WAITKIND_STOPPED
1202 && status
->value
.sig
== GDB_SIGNAL_TRAP
)
1204 struct regcache
*regcache
;
1205 enum target_stop_reason
*stop_reason_p
1206 = &record_full_stop_reason
;
1208 /* Yes -- this is likely our single-step finishing,
1209 but check if there's any reason the core would be
1210 interested in the event. */
1212 registers_changed ();
1213 switch_to_thread (current_inferior ()->process_target (),
1215 regcache
= get_current_regcache ();
1216 tmp_pc
= regcache_read_pc (regcache
);
1217 const struct address_space
*aspace
= regcache
->aspace ();
1219 if (target_stopped_by_watchpoint ())
1221 /* Always interested in watchpoints. */
1223 else if (record_check_stopped_by_breakpoint (aspace
, tmp_pc
,
1226 /* There is a breakpoint here. Let the core
1231 /* This is a single-step trap. Record the
1232 insn and issue another step.
1233 FIXME: this part can be a random SIGTRAP too.
1234 But GDB cannot handle it. */
1237 if (!record_full_message_wrapper_safe (regcache
,
1240 status
->kind
= TARGET_WAITKIND_STOPPED
;
1241 status
->value
.sig
= GDB_SIGNAL_0
;
1245 if (gdbarch_software_single_step_p (gdbarch
))
1247 process_stratum_target
*proc_target
1248 = current_inferior ()->process_target ();
1250 /* Try to insert the software single step breakpoint.
1251 If insert success, set step to 0. */
1252 set_executing (proc_target
, inferior_ptid
, false);
1253 reinit_frame_cache ();
1255 step
= !insert_single_step_breakpoints (gdbarch
);
1257 set_executing (proc_target
, inferior_ptid
, true);
1261 fprintf_unfiltered (gdb_stdlog
,
1262 "Process record: record_full_wait "
1263 "issuing one more step in the "
1264 "target beneath\n");
1265 ops
->beneath ()->resume (ptid
, step
, GDB_SIGNAL_0
);
1266 ops
->beneath ()->commit_resume ();
1271 /* The inferior is broken by a breakpoint or a signal. */
1280 switch_to_thread (current_inferior ()->process_target (),
1281 record_full_resume_ptid
);
1282 struct regcache
*regcache
= get_current_regcache ();
1283 struct gdbarch
*gdbarch
= regcache
->arch ();
1284 const struct address_space
*aspace
= regcache
->aspace ();
1285 int continue_flag
= 1;
1286 int first_record_full_end
= 1;
1292 record_full_stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
1293 status
->kind
= TARGET_WAITKIND_STOPPED
;
1295 /* Check breakpoint when forward execute. */
1296 if (execution_direction
== EXEC_FORWARD
)
1298 tmp_pc
= regcache_read_pc (regcache
);
1299 if (record_check_stopped_by_breakpoint (aspace
, tmp_pc
,
1300 &record_full_stop_reason
))
1303 fprintf_unfiltered (gdb_stdlog
,
1304 "Process record: break at %s.\n",
1305 paddress (gdbarch
, tmp_pc
));
1310 /* If GDB is in terminal_inferior mode, it will not get the
1311 signal. And in GDB replay mode, GDB doesn't need to be
1312 in terminal_inferior mode, because inferior will not
1313 executed. Then set it to terminal_ours to make GDB get
1315 target_terminal::ours ();
1317 /* In EXEC_FORWARD mode, record_full_list points to the tail of prev
1319 if (execution_direction
== EXEC_FORWARD
&& record_full_list
->next
)
1320 record_full_list
= record_full_list
->next
;
1322 /* Loop over the record_full_list, looking for the next place to
1326 /* Check for beginning and end of log. */
1327 if (execution_direction
== EXEC_REVERSE
1328 && record_full_list
== &record_full_first
)
1330 /* Hit beginning of record log in reverse. */
1331 status
->kind
= TARGET_WAITKIND_NO_HISTORY
;
1334 if (execution_direction
!= EXEC_REVERSE
1335 && !record_full_list
->next
)
1337 /* Hit end of record log going forward. */
1338 status
->kind
= TARGET_WAITKIND_NO_HISTORY
;
1342 record_full_exec_insn (regcache
, gdbarch
, record_full_list
);
1344 if (record_full_list
->type
== record_full_end
)
1346 if (record_debug
> 1)
1349 "Process record: record_full_end %s to "
1351 host_address_to_string (record_full_list
));
1353 if (first_record_full_end
1354 && execution_direction
== EXEC_REVERSE
)
1356 /* When reverse execute, the first
1357 record_full_end is the part of current
1359 first_record_full_end
= 0;
1363 /* In EXEC_REVERSE mode, this is the
1364 record_full_end of prev instruction. In
1365 EXEC_FORWARD mode, this is the
1366 record_full_end of current instruction. */
1368 if (record_full_resume_step
)
1370 if (record_debug
> 1)
1371 fprintf_unfiltered (gdb_stdlog
,
1372 "Process record: step.\n");
1376 /* check breakpoint */
1377 tmp_pc
= regcache_read_pc (regcache
);
1378 if (record_check_stopped_by_breakpoint
1379 (aspace
, tmp_pc
, &record_full_stop_reason
))
1382 fprintf_unfiltered (gdb_stdlog
,
1383 "Process record: break "
1385 paddress (gdbarch
, tmp_pc
));
1390 if (record_full_stop_reason
1391 == TARGET_STOPPED_BY_WATCHPOINT
)
1394 fprintf_unfiltered (gdb_stdlog
,
1395 "Process record: hit hw "
1399 /* Check target signal */
1400 if (record_full_list
->u
.end
.sigval
!= GDB_SIGNAL_0
)
1401 /* FIXME: better way to check */
1408 if (execution_direction
== EXEC_REVERSE
)
1410 if (record_full_list
->prev
)
1411 record_full_list
= record_full_list
->prev
;
1415 if (record_full_list
->next
)
1416 record_full_list
= record_full_list
->next
;
1420 while (continue_flag
);
1423 if (record_full_get_sig
)
1424 status
->value
.sig
= GDB_SIGNAL_INT
;
1425 else if (record_full_list
->u
.end
.sigval
!= GDB_SIGNAL_0
)
1426 /* FIXME: better way to check */
1427 status
->value
.sig
= record_full_list
->u
.end
.sigval
;
1429 status
->value
.sig
= GDB_SIGNAL_TRAP
;
1431 catch (const gdb_exception
&ex
)
1433 if (execution_direction
== EXEC_REVERSE
)
1435 if (record_full_list
->next
)
1436 record_full_list
= record_full_list
->next
;
1439 record_full_list
= record_full_list
->prev
;
1445 signal (SIGINT
, handle_sigint
);
1447 return inferior_ptid
;
1451 record_full_base_target::wait (ptid_t ptid
, struct target_waitstatus
*status
,
1452 target_wait_flags options
)
1456 return_ptid
= record_full_wait_1 (this, ptid
, status
, options
);
1457 if (status
->kind
!= TARGET_WAITKIND_IGNORE
)
1459 /* We're reporting a stop. Make sure any spurious
1460 target_wait(WNOHANG) doesn't advance the target until the
1461 core wants us resumed again. */
1462 record_full_resumed
= 0;
1468 record_full_base_target::stopped_by_watchpoint ()
1470 if (RECORD_FULL_IS_REPLAY
)
1471 return record_full_stop_reason
== TARGET_STOPPED_BY_WATCHPOINT
;
1473 return beneath ()->stopped_by_watchpoint ();
1477 record_full_base_target::stopped_data_address (CORE_ADDR
*addr_p
)
1479 if (RECORD_FULL_IS_REPLAY
)
1482 return this->beneath ()->stopped_data_address (addr_p
);
1485 /* The stopped_by_sw_breakpoint method of target record-full. */
1488 record_full_base_target::stopped_by_sw_breakpoint ()
1490 return record_full_stop_reason
== TARGET_STOPPED_BY_SW_BREAKPOINT
;
1493 /* The supports_stopped_by_sw_breakpoint method of target
1497 record_full_base_target::supports_stopped_by_sw_breakpoint ()
1502 /* The stopped_by_hw_breakpoint method of target record-full. */
1505 record_full_base_target::stopped_by_hw_breakpoint ()
1507 return record_full_stop_reason
== TARGET_STOPPED_BY_HW_BREAKPOINT
;
1510 /* The supports_stopped_by_sw_breakpoint method of target
1514 record_full_base_target::supports_stopped_by_hw_breakpoint ()
1519 /* Record registers change (by user or by GDB) to list as an instruction. */
1522 record_full_registers_change (struct regcache
*regcache
, int regnum
)
1524 /* Check record_full_insn_num. */
1525 record_full_check_insn_num ();
1527 record_full_arch_list_head
= NULL
;
1528 record_full_arch_list_tail
= NULL
;
1534 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
1536 if (record_full_arch_list_add_reg (regcache
, i
))
1538 record_full_list_release (record_full_arch_list_tail
);
1539 error (_("Process record: failed to record execution log."));
1545 if (record_full_arch_list_add_reg (regcache
, regnum
))
1547 record_full_list_release (record_full_arch_list_tail
);
1548 error (_("Process record: failed to record execution log."));
1551 if (record_full_arch_list_add_end ())
1553 record_full_list_release (record_full_arch_list_tail
);
1554 error (_("Process record: failed to record execution log."));
1556 record_full_list
->next
= record_full_arch_list_head
;
1557 record_full_arch_list_head
->prev
= record_full_list
;
1558 record_full_list
= record_full_arch_list_tail
;
1560 if (record_full_insn_num
== record_full_insn_max_num
)
1561 record_full_list_release_first ();
1563 record_full_insn_num
++;
1566 /* "store_registers" method for process record target. */
1569 record_full_target::store_registers (struct regcache
*regcache
, int regno
)
1571 if (!record_full_gdb_operation_disable
)
1573 if (RECORD_FULL_IS_REPLAY
)
1577 /* Let user choose if he wants to write register or not. */
1580 query (_("Because GDB is in replay mode, changing the "
1581 "value of a register will make the execution "
1582 "log unusable from this point onward. "
1583 "Change all registers?"));
1586 query (_("Because GDB is in replay mode, changing the value "
1587 "of a register will make the execution log unusable "
1588 "from this point onward. Change register %s?"),
1589 gdbarch_register_name (regcache
->arch (),
1594 /* Invalidate the value of regcache that was set in function
1595 "regcache_raw_write". */
1601 i
< gdbarch_num_regs (regcache
->arch ());
1603 regcache
->invalidate (i
);
1606 regcache
->invalidate (regno
);
1608 error (_("Process record canceled the operation."));
1611 /* Destroy the record from here forward. */
1612 record_full_list_release_following (record_full_list
);
1615 record_full_registers_change (regcache
, regno
);
1617 this->beneath ()->store_registers (regcache
, regno
);
1620 /* "xfer_partial" method. Behavior is conditional on
1621 RECORD_FULL_IS_REPLAY.
1622 In replay mode, we cannot write memory unles we are willing to
1623 invalidate the record/replay log from this point forward. */
1625 enum target_xfer_status
1626 record_full_target::xfer_partial (enum target_object object
,
1627 const char *annex
, gdb_byte
*readbuf
,
1628 const gdb_byte
*writebuf
, ULONGEST offset
,
1629 ULONGEST len
, ULONGEST
*xfered_len
)
1631 if (!record_full_gdb_operation_disable
1632 && (object
== TARGET_OBJECT_MEMORY
1633 || object
== TARGET_OBJECT_RAW_MEMORY
) && writebuf
)
1635 if (RECORD_FULL_IS_REPLAY
)
1637 /* Let user choose if he wants to write memory or not. */
1638 if (!query (_("Because GDB is in replay mode, writing to memory "
1639 "will make the execution log unusable from this "
1640 "point onward. Write memory at address %s?"),
1641 paddress (target_gdbarch (), offset
)))
1642 error (_("Process record canceled the operation."));
1644 /* Destroy the record from here forward. */
1645 record_full_list_release_following (record_full_list
);
1648 /* Check record_full_insn_num */
1649 record_full_check_insn_num ();
1651 /* Record registers change to list as an instruction. */
1652 record_full_arch_list_head
= NULL
;
1653 record_full_arch_list_tail
= NULL
;
1654 if (record_full_arch_list_add_mem (offset
, len
))
1656 record_full_list_release (record_full_arch_list_tail
);
1658 fprintf_unfiltered (gdb_stdlog
,
1659 "Process record: failed to record "
1661 return TARGET_XFER_E_IO
;
1663 if (record_full_arch_list_add_end ())
1665 record_full_list_release (record_full_arch_list_tail
);
1667 fprintf_unfiltered (gdb_stdlog
,
1668 "Process record: failed to record "
1670 return TARGET_XFER_E_IO
;
1672 record_full_list
->next
= record_full_arch_list_head
;
1673 record_full_arch_list_head
->prev
= record_full_list
;
1674 record_full_list
= record_full_arch_list_tail
;
1676 if (record_full_insn_num
== record_full_insn_max_num
)
1677 record_full_list_release_first ();
1679 record_full_insn_num
++;
1682 return this->beneath ()->xfer_partial (object
, annex
, readbuf
, writebuf
,
1683 offset
, len
, xfered_len
);
1686 /* This structure represents a breakpoint inserted while the record
1687 target is active. We use this to know when to install/remove
1688 breakpoints in/from the target beneath. For example, a breakpoint
1689 may be inserted while recording, but removed when not replaying nor
1690 recording. In that case, the breakpoint had not been inserted on
1691 the target beneath, so we should not try to remove it there. */
1693 struct record_full_breakpoint
1695 record_full_breakpoint (struct address_space
*address_space_
,
1697 bool in_target_beneath_
)
1698 : address_space (address_space_
),
1700 in_target_beneath (in_target_beneath_
)
1704 /* The address and address space the breakpoint was set at. */
1705 struct address_space
*address_space
;
1708 /* True when the breakpoint has been also installed in the target
1709 beneath. This will be false for breakpoints set during replay or
1711 bool in_target_beneath
;
1714 /* The list of breakpoints inserted while the record target is
1716 static std::vector
<record_full_breakpoint
> record_full_breakpoints
;
1719 record_full_sync_record_breakpoints (struct bp_location
*loc
, void *data
)
1721 if (loc
->loc_type
!= bp_loc_software_breakpoint
)
1726 record_full_breakpoints
.emplace_back
1727 (loc
->target_info
.placed_address_space
,
1728 loc
->target_info
.placed_address
,
1733 /* Sync existing breakpoints to record_full_breakpoints. */
1736 record_full_init_record_breakpoints (void)
1738 record_full_breakpoints
.clear ();
1740 iterate_over_bp_locations (record_full_sync_record_breakpoints
);
1743 /* Behavior is conditional on RECORD_FULL_IS_REPLAY. We will not actually
1744 insert or remove breakpoints in the real target when replaying, nor
1748 record_full_target::insert_breakpoint (struct gdbarch
*gdbarch
,
1749 struct bp_target_info
*bp_tgt
)
1751 bool in_target_beneath
= false;
1753 if (!RECORD_FULL_IS_REPLAY
)
1755 /* When recording, we currently always single-step, so we don't
1756 really need to install regular breakpoints in the inferior.
1757 However, we do have to insert software single-step
1758 breakpoints, in case the target can't hardware step. To keep
1759 things simple, we always insert. */
1761 scoped_restore restore_operation_disable
1762 = record_full_gdb_operation_disable_set ();
1764 int ret
= this->beneath ()->insert_breakpoint (gdbarch
, bp_tgt
);
1768 in_target_beneath
= true;
1771 /* Use the existing entries if found in order to avoid duplication
1772 in record_full_breakpoints. */
1774 for (const record_full_breakpoint
&bp
: record_full_breakpoints
)
1776 if (bp
.addr
== bp_tgt
->placed_address
1777 && bp
.address_space
== bp_tgt
->placed_address_space
)
1779 gdb_assert (bp
.in_target_beneath
== in_target_beneath
);
1784 record_full_breakpoints
.emplace_back (bp_tgt
->placed_address_space
,
1785 bp_tgt
->placed_address
,
1790 /* "remove_breakpoint" method for process record target. */
1793 record_full_target::remove_breakpoint (struct gdbarch
*gdbarch
,
1794 struct bp_target_info
*bp_tgt
,
1795 enum remove_bp_reason reason
)
1797 for (auto iter
= record_full_breakpoints
.begin ();
1798 iter
!= record_full_breakpoints
.end ();
1801 struct record_full_breakpoint
&bp
= *iter
;
1803 if (bp
.addr
== bp_tgt
->placed_address
1804 && bp
.address_space
== bp_tgt
->placed_address_space
)
1806 if (bp
.in_target_beneath
)
1808 scoped_restore restore_operation_disable
1809 = record_full_gdb_operation_disable_set ();
1811 int ret
= this->beneath ()->remove_breakpoint (gdbarch
, bp_tgt
,
1817 if (reason
== REMOVE_BREAKPOINT
)
1818 unordered_remove (record_full_breakpoints
, iter
);
1823 gdb_assert_not_reached ("removing unknown breakpoint");
1826 /* "can_execute_reverse" method for process record target. */
1829 record_full_base_target::can_execute_reverse ()
1834 /* "get_bookmark" method for process record and prec over core. */
1837 record_full_base_target::get_bookmark (const char *args
, int from_tty
)
1841 /* Return stringified form of instruction count. */
1842 if (record_full_list
&& record_full_list
->type
== record_full_end
)
1843 ret
= xstrdup (pulongest (record_full_list
->u
.end
.insn_num
));
1848 fprintf_unfiltered (gdb_stdlog
,
1849 "record_full_get_bookmark returns %s\n", ret
);
1851 fprintf_unfiltered (gdb_stdlog
,
1852 "record_full_get_bookmark returns NULL\n");
1854 return (gdb_byte
*) ret
;
1857 /* "goto_bookmark" method for process record and prec over core. */
1860 record_full_base_target::goto_bookmark (const gdb_byte
*raw_bookmark
,
1863 const char *bookmark
= (const char *) raw_bookmark
;
1866 fprintf_unfiltered (gdb_stdlog
,
1867 "record_full_goto_bookmark receives %s\n", bookmark
);
1869 std::string name_holder
;
1870 if (bookmark
[0] == '\'' || bookmark
[0] == '\"')
1872 if (bookmark
[strlen (bookmark
) - 1] != bookmark
[0])
1873 error (_("Unbalanced quotes: %s"), bookmark
);
1875 name_holder
= std::string (bookmark
+ 1, strlen (bookmark
) - 2);
1876 bookmark
= name_holder
.c_str ();
1879 record_goto (bookmark
);
1882 enum exec_direction_kind
1883 record_full_base_target::execution_direction ()
1885 return record_full_execution_dir
;
1888 /* The record_method method of target record-full. */
1891 record_full_base_target::record_method (ptid_t ptid
)
1893 return RECORD_METHOD_FULL
;
1897 record_full_base_target::info_record ()
1899 struct record_full_entry
*p
;
1901 if (RECORD_FULL_IS_REPLAY
)
1902 printf_filtered (_("Replay mode:\n"));
1904 printf_filtered (_("Record mode:\n"));
1906 /* Find entry for first actual instruction in the log. */
1907 for (p
= record_full_first
.next
;
1908 p
!= NULL
&& p
->type
!= record_full_end
;
1912 /* Do we have a log at all? */
1913 if (p
!= NULL
&& p
->type
== record_full_end
)
1915 /* Display instruction number for first instruction in the log. */
1916 printf_filtered (_("Lowest recorded instruction number is %s.\n"),
1917 pulongest (p
->u
.end
.insn_num
));
1919 /* If in replay mode, display where we are in the log. */
1920 if (RECORD_FULL_IS_REPLAY
)
1921 printf_filtered (_("Current instruction number is %s.\n"),
1922 pulongest (record_full_list
->u
.end
.insn_num
));
1924 /* Display instruction number for last instruction in the log. */
1925 printf_filtered (_("Highest recorded instruction number is %s.\n"),
1926 pulongest (record_full_insn_count
));
1928 /* Display log count. */
1929 printf_filtered (_("Log contains %u instructions.\n"),
1930 record_full_insn_num
);
1933 printf_filtered (_("No instructions have been logged.\n"));
1935 /* Display max log size. */
1936 printf_filtered (_("Max logged instructions is %u.\n"),
1937 record_full_insn_max_num
);
1941 record_full_base_target::supports_delete_record ()
1946 /* The "delete_record" target method. */
1949 record_full_base_target::delete_record ()
1951 record_full_list_release_following (record_full_list
);
1954 /* The "record_is_replaying" target method. */
1957 record_full_base_target::record_is_replaying (ptid_t ptid
)
1959 return RECORD_FULL_IS_REPLAY
;
1962 /* The "record_will_replay" target method. */
1965 record_full_base_target::record_will_replay (ptid_t ptid
, int dir
)
1967 /* We can currently only record when executing forwards. Should we be able
1968 to record when executing backwards on targets that support reverse
1969 execution, this needs to be changed. */
1971 return RECORD_FULL_IS_REPLAY
|| dir
== EXEC_REVERSE
;
1974 /* Go to a specific entry. */
1977 record_full_goto_entry (struct record_full_entry
*p
)
1980 error (_("Target insn not found."));
1981 else if (p
== record_full_list
)
1982 error (_("Already at target insn."));
1983 else if (p
->u
.end
.insn_num
> record_full_list
->u
.end
.insn_num
)
1985 printf_filtered (_("Go forward to insn number %s\n"),
1986 pulongest (p
->u
.end
.insn_num
));
1987 record_full_goto_insn (p
, EXEC_FORWARD
);
1991 printf_filtered (_("Go backward to insn number %s\n"),
1992 pulongest (p
->u
.end
.insn_num
));
1993 record_full_goto_insn (p
, EXEC_REVERSE
);
1996 registers_changed ();
1997 reinit_frame_cache ();
1998 inferior_thread ()->suspend
.stop_pc
1999 = regcache_read_pc (get_current_regcache ());
2000 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
, 1);
2003 /* The "goto_record_begin" target method. */
2006 record_full_base_target::goto_record_begin ()
2008 struct record_full_entry
*p
= NULL
;
2010 for (p
= &record_full_first
; p
!= NULL
; p
= p
->next
)
2011 if (p
->type
== record_full_end
)
2014 record_full_goto_entry (p
);
2017 /* The "goto_record_end" target method. */
2020 record_full_base_target::goto_record_end ()
2022 struct record_full_entry
*p
= NULL
;
2024 for (p
= record_full_list
; p
->next
!= NULL
; p
= p
->next
)
2026 for (; p
!= NULL
; p
= p
->prev
)
2027 if (p
->type
== record_full_end
)
2030 record_full_goto_entry (p
);
2033 /* The "goto_record" target method. */
2036 record_full_base_target::goto_record (ULONGEST target_insn
)
2038 struct record_full_entry
*p
= NULL
;
2040 for (p
= &record_full_first
; p
!= NULL
; p
= p
->next
)
2041 if (p
->type
== record_full_end
&& p
->u
.end
.insn_num
== target_insn
)
2044 record_full_goto_entry (p
);
2047 /* The "record_stop_replaying" target method. */
2050 record_full_base_target::record_stop_replaying ()
2055 /* "resume" method for prec over corefile. */
2058 record_full_core_target::resume (ptid_t ptid
, int step
,
2059 enum gdb_signal signal
)
2061 record_full_resume_step
= step
;
2062 record_full_resumed
= 1;
2063 record_full_execution_dir
= ::execution_direction
;
2065 /* We are about to start executing the inferior (or simulate it),
2066 let's register it with the event loop. */
2067 if (target_can_async_p ())
2071 /* "kill" method for prec over corefile. */
2074 record_full_core_target::kill ()
2077 fprintf_unfiltered (gdb_stdlog
, "Process record: record_full_core_kill\n");
2079 unpush_target (this);
2082 /* "fetch_registers" method for prec over corefile. */
2085 record_full_core_target::fetch_registers (struct regcache
*regcache
,
2090 int num
= gdbarch_num_regs (regcache
->arch ());
2093 for (i
= 0; i
< num
; i
++)
2094 regcache
->raw_supply (i
, *record_full_core_regbuf
);
2097 regcache
->raw_supply (regno
, *record_full_core_regbuf
);
2100 /* "prepare_to_store" method for prec over corefile. */
2103 record_full_core_target::prepare_to_store (struct regcache
*regcache
)
2107 /* "store_registers" method for prec over corefile. */
2110 record_full_core_target::store_registers (struct regcache
*regcache
,
2113 if (record_full_gdb_operation_disable
)
2114 record_full_core_regbuf
->raw_supply (regno
, *regcache
);
2116 error (_("You can't do that without a process to debug."));
2119 /* "xfer_partial" method for prec over corefile. */
2121 enum target_xfer_status
2122 record_full_core_target::xfer_partial (enum target_object object
,
2123 const char *annex
, gdb_byte
*readbuf
,
2124 const gdb_byte
*writebuf
, ULONGEST offset
,
2125 ULONGEST len
, ULONGEST
*xfered_len
)
2127 if (object
== TARGET_OBJECT_MEMORY
)
2129 if (record_full_gdb_operation_disable
|| !writebuf
)
2131 for (target_section
&p
: record_full_core_sections
)
2133 if (offset
>= p
.addr
)
2135 struct record_full_core_buf_entry
*entry
;
2136 ULONGEST sec_offset
;
2138 if (offset
>= p
.endaddr
)
2141 if (offset
+ len
> p
.endaddr
)
2142 len
= p
.endaddr
- offset
;
2144 sec_offset
= offset
- p
.addr
;
2146 /* Read readbuf or write writebuf p, offset, len. */
2148 if (p
.the_bfd_section
->flags
& SEC_CONSTRUCTOR
2149 || (p
.the_bfd_section
->flags
& SEC_HAS_CONTENTS
) == 0)
2152 memset (readbuf
, 0, len
);
2155 return TARGET_XFER_OK
;
2157 /* Get record_full_core_buf_entry. */
2158 for (entry
= record_full_core_buf_list
; entry
;
2159 entry
= entry
->prev
)
2166 /* Add a new entry. */
2167 entry
= XNEW (struct record_full_core_buf_entry
);
2169 if (!bfd_malloc_and_get_section
2170 (p
.the_bfd_section
->owner
,
2175 return TARGET_XFER_EOF
;
2177 entry
->prev
= record_full_core_buf_list
;
2178 record_full_core_buf_list
= entry
;
2181 memcpy (entry
->buf
+ sec_offset
, writebuf
,
2187 return this->beneath ()->xfer_partial (object
, annex
,
2192 memcpy (readbuf
, entry
->buf
+ sec_offset
,
2197 return TARGET_XFER_OK
;
2201 return TARGET_XFER_E_IO
;
2204 error (_("You can't do that without a process to debug."));
2207 return this->beneath ()->xfer_partial (object
, annex
,
2208 readbuf
, writebuf
, offset
, len
,
2212 /* "insert_breakpoint" method for prec over corefile. */
2215 record_full_core_target::insert_breakpoint (struct gdbarch
*gdbarch
,
2216 struct bp_target_info
*bp_tgt
)
2221 /* "remove_breakpoint" method for prec over corefile. */
2224 record_full_core_target::remove_breakpoint (struct gdbarch
*gdbarch
,
2225 struct bp_target_info
*bp_tgt
,
2226 enum remove_bp_reason reason
)
2231 /* "has_execution" method for prec over corefile. */
2234 record_full_core_target::has_execution (inferior
*inf
)
2239 /* Record log save-file format
2240 Version 1 (never released)
2243 4 bytes: magic number htonl(0x20090829).
2244 NOTE: be sure to change whenever this file format changes!
2248 1 byte: record type (record_full_end, see enum record_full_type).
2250 1 byte: record type (record_full_reg, see enum record_full_type).
2251 8 bytes: register id (network byte order).
2252 MAX_REGISTER_SIZE bytes: register value.
2254 1 byte: record type (record_full_mem, see enum record_full_type).
2255 8 bytes: memory length (network byte order).
2256 8 bytes: memory address (network byte order).
2257 n bytes: memory value (n == memory length).
2260 4 bytes: magic number netorder32(0x20091016).
2261 NOTE: be sure to change whenever this file format changes!
2265 1 byte: record type (record_full_end, see enum record_full_type).
2267 4 bytes: instruction count
2269 1 byte: record type (record_full_reg, see enum record_full_type).
2270 4 bytes: register id (network byte order).
2271 n bytes: register value (n == actual register size).
2272 (eg. 4 bytes for x86 general registers).
2274 1 byte: record type (record_full_mem, see enum record_full_type).
2275 4 bytes: memory length (network byte order).
2276 8 bytes: memory address (network byte order).
2277 n bytes: memory value (n == memory length).
2281 /* bfdcore_read -- read bytes from a core file section. */
2284 bfdcore_read (bfd
*obfd
, asection
*osec
, void *buf
, int len
, int *offset
)
2286 int ret
= bfd_get_section_contents (obfd
, osec
, buf
, *offset
, len
);
2291 error (_("Failed to read %d bytes from core file %s ('%s')."),
2292 len
, bfd_get_filename (obfd
),
2293 bfd_errmsg (bfd_get_error ()));
2296 static inline uint64_t
2297 netorder64 (uint64_t input
)
2301 store_unsigned_integer ((gdb_byte
*) &ret
, sizeof (ret
),
2302 BFD_ENDIAN_BIG
, input
);
2306 static inline uint32_t
2307 netorder32 (uint32_t input
)
2311 store_unsigned_integer ((gdb_byte
*) &ret
, sizeof (ret
),
2312 BFD_ENDIAN_BIG
, input
);
2316 /* Restore the execution log from a core_bfd file. */
2318 record_full_restore (void)
2321 struct record_full_entry
*rec
;
2325 struct regcache
*regcache
;
2327 /* We restore the execution log from the open core bfd,
2329 if (core_bfd
== NULL
)
2332 /* "record_full_restore" can only be called when record list is empty. */
2333 gdb_assert (record_full_first
.next
== NULL
);
2336 fprintf_unfiltered (gdb_stdlog
, "Restoring recording from core file.\n");
2338 /* Now need to find our special note section. */
2339 osec
= bfd_get_section_by_name (core_bfd
, "null0");
2341 fprintf_unfiltered (gdb_stdlog
, "Find precord section %s.\n",
2342 osec
? "succeeded" : "failed");
2345 osec_size
= bfd_section_size (osec
);
2347 fprintf_unfiltered (gdb_stdlog
, "%s", bfd_section_name (osec
));
2349 /* Check the magic code. */
2350 bfdcore_read (core_bfd
, osec
, &magic
, sizeof (magic
), &bfd_offset
);
2351 if (magic
!= RECORD_FULL_FILE_MAGIC
)
2352 error (_("Version mis-match or file format error in core file %s."),
2353 bfd_get_filename (core_bfd
));
2355 fprintf_unfiltered (gdb_stdlog
,
2356 " Reading 4-byte magic cookie "
2357 "RECORD_FULL_FILE_MAGIC (0x%s)\n",
2358 phex_nz (netorder32 (magic
), 4));
2360 /* Restore the entries in recfd into record_full_arch_list_head and
2361 record_full_arch_list_tail. */
2362 record_full_arch_list_head
= NULL
;
2363 record_full_arch_list_tail
= NULL
;
2364 record_full_insn_num
= 0;
2368 regcache
= get_current_regcache ();
2373 uint32_t regnum
, len
, signal
, count
;
2376 /* We are finished when offset reaches osec_size. */
2377 if (bfd_offset
>= osec_size
)
2379 bfdcore_read (core_bfd
, osec
, &rectype
, sizeof (rectype
), &bfd_offset
);
2383 case record_full_reg
: /* reg */
2384 /* Get register number to regnum. */
2385 bfdcore_read (core_bfd
, osec
, ®num
,
2386 sizeof (regnum
), &bfd_offset
);
2387 regnum
= netorder32 (regnum
);
2389 rec
= record_full_reg_alloc (regcache
, regnum
);
2392 bfdcore_read (core_bfd
, osec
, record_full_get_loc (rec
),
2393 rec
->u
.reg
.len
, &bfd_offset
);
2396 fprintf_unfiltered (gdb_stdlog
,
2397 " Reading register %d (1 "
2398 "plus %lu plus %d bytes)\n",
2400 (unsigned long) sizeof (regnum
),
2404 case record_full_mem
: /* mem */
2406 bfdcore_read (core_bfd
, osec
, &len
,
2407 sizeof (len
), &bfd_offset
);
2408 len
= netorder32 (len
);
2411 bfdcore_read (core_bfd
, osec
, &addr
,
2412 sizeof (addr
), &bfd_offset
);
2413 addr
= netorder64 (addr
);
2415 rec
= record_full_mem_alloc (addr
, len
);
2418 bfdcore_read (core_bfd
, osec
, record_full_get_loc (rec
),
2419 rec
->u
.mem
.len
, &bfd_offset
);
2422 fprintf_unfiltered (gdb_stdlog
,
2423 " Reading memory %s (1 plus "
2424 "%lu plus %lu plus %d bytes)\n",
2425 paddress (get_current_arch (),
2427 (unsigned long) sizeof (addr
),
2428 (unsigned long) sizeof (len
),
2432 case record_full_end
: /* end */
2433 rec
= record_full_end_alloc ();
2434 record_full_insn_num
++;
2436 /* Get signal value. */
2437 bfdcore_read (core_bfd
, osec
, &signal
,
2438 sizeof (signal
), &bfd_offset
);
2439 signal
= netorder32 (signal
);
2440 rec
->u
.end
.sigval
= (enum gdb_signal
) signal
;
2442 /* Get insn count. */
2443 bfdcore_read (core_bfd
, osec
, &count
,
2444 sizeof (count
), &bfd_offset
);
2445 count
= netorder32 (count
);
2446 rec
->u
.end
.insn_num
= count
;
2447 record_full_insn_count
= count
+ 1;
2449 fprintf_unfiltered (gdb_stdlog
,
2450 " Reading record_full_end (1 + "
2451 "%lu + %lu bytes), offset == %s\n",
2452 (unsigned long) sizeof (signal
),
2453 (unsigned long) sizeof (count
),
2454 paddress (get_current_arch (),
2459 error (_("Bad entry type in core file %s."),
2460 bfd_get_filename (core_bfd
));
2464 /* Add rec to record arch list. */
2465 record_full_arch_list_add (rec
);
2468 catch (const gdb_exception
&ex
)
2470 record_full_list_release (record_full_arch_list_tail
);
2474 /* Add record_full_arch_list_head to the end of record list. */
2475 record_full_first
.next
= record_full_arch_list_head
;
2476 record_full_arch_list_head
->prev
= &record_full_first
;
2477 record_full_arch_list_tail
->next
= NULL
;
2478 record_full_list
= &record_full_first
;
2480 /* Update record_full_insn_max_num. */
2481 if (record_full_insn_num
> record_full_insn_max_num
)
2483 record_full_insn_max_num
= record_full_insn_num
;
2484 warning (_("Auto increase record/replay buffer limit to %u."),
2485 record_full_insn_max_num
);
2489 printf_filtered (_("Restored records from core file %s.\n"),
2490 bfd_get_filename (core_bfd
));
2492 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
, 1);
2495 /* bfdcore_write -- write bytes into a core file section. */
2498 bfdcore_write (bfd
*obfd
, asection
*osec
, void *buf
, int len
, int *offset
)
2500 int ret
= bfd_set_section_contents (obfd
, osec
, buf
, *offset
, len
);
2505 error (_("Failed to write %d bytes to core file %s ('%s')."),
2506 len
, bfd_get_filename (obfd
),
2507 bfd_errmsg (bfd_get_error ()));
2510 /* Restore the execution log from a file. We use a modified elf
2511 corefile format, with an extra section for our data. */
2514 cmd_record_full_restore (const char *args
, int from_tty
)
2516 core_file_command (args
, from_tty
);
2517 record_full_open (args
, from_tty
);
2520 /* Save the execution log to a file. We use a modified elf corefile
2521 format, with an extra section for our data. */
2524 record_full_base_target::save_record (const char *recfilename
)
2526 struct record_full_entry
*cur_record_full_list
;
2528 struct regcache
*regcache
;
2529 struct gdbarch
*gdbarch
;
2531 asection
*osec
= NULL
;
2534 /* Open the save file. */
2536 fprintf_unfiltered (gdb_stdlog
, "Saving execution log to core file '%s'\n",
2539 /* Open the output file. */
2540 gdb_bfd_ref_ptr
obfd (create_gcore_bfd (recfilename
));
2542 /* Arrange to remove the output file on failure. */
2543 gdb::unlinker
unlink_file (recfilename
);
2545 /* Save the current record entry to "cur_record_full_list". */
2546 cur_record_full_list
= record_full_list
;
2548 /* Get the values of regcache and gdbarch. */
2549 regcache
= get_current_regcache ();
2550 gdbarch
= regcache
->arch ();
2552 /* Disable the GDB operation record. */
2553 scoped_restore restore_operation_disable
2554 = record_full_gdb_operation_disable_set ();
2556 /* Reverse execute to the begin of record list. */
2559 /* Check for beginning and end of log. */
2560 if (record_full_list
== &record_full_first
)
2563 record_full_exec_insn (regcache
, gdbarch
, record_full_list
);
2565 if (record_full_list
->prev
)
2566 record_full_list
= record_full_list
->prev
;
2569 /* Compute the size needed for the extra bfd section. */
2570 save_size
= 4; /* magic cookie */
2571 for (record_full_list
= record_full_first
.next
; record_full_list
;
2572 record_full_list
= record_full_list
->next
)
2573 switch (record_full_list
->type
)
2575 case record_full_end
:
2576 save_size
+= 1 + 4 + 4;
2578 case record_full_reg
:
2579 save_size
+= 1 + 4 + record_full_list
->u
.reg
.len
;
2581 case record_full_mem
:
2582 save_size
+= 1 + 4 + 8 + record_full_list
->u
.mem
.len
;
2586 /* Make the new bfd section. */
2587 osec
= bfd_make_section_anyway_with_flags (obfd
.get (), "precord",
2591 error (_("Failed to create 'precord' section for corefile %s: %s"),
2593 bfd_errmsg (bfd_get_error ()));
2594 bfd_set_section_size (osec
, save_size
);
2595 bfd_set_section_vma (osec
, 0);
2596 bfd_set_section_alignment (osec
, 0);
2598 /* Save corefile state. */
2599 write_gcore_file (obfd
.get ());
2601 /* Write out the record log. */
2602 /* Write the magic code. */
2603 magic
= RECORD_FULL_FILE_MAGIC
;
2605 fprintf_unfiltered (gdb_stdlog
,
2606 " Writing 4-byte magic cookie "
2607 "RECORD_FULL_FILE_MAGIC (0x%s)\n",
2608 phex_nz (magic
, 4));
2609 bfdcore_write (obfd
.get (), osec
, &magic
, sizeof (magic
), &bfd_offset
);
2611 /* Save the entries to recfd and forward execute to the end of
2613 record_full_list
= &record_full_first
;
2617 if (record_full_list
!= &record_full_first
)
2620 uint32_t regnum
, len
, signal
, count
;
2623 type
= record_full_list
->type
;
2624 bfdcore_write (obfd
.get (), osec
, &type
, sizeof (type
), &bfd_offset
);
2626 switch (record_full_list
->type
)
2628 case record_full_reg
: /* reg */
2630 fprintf_unfiltered (gdb_stdlog
,
2631 " Writing register %d (1 "
2632 "plus %lu plus %d bytes)\n",
2633 record_full_list
->u
.reg
.num
,
2634 (unsigned long) sizeof (regnum
),
2635 record_full_list
->u
.reg
.len
);
2638 regnum
= netorder32 (record_full_list
->u
.reg
.num
);
2639 bfdcore_write (obfd
.get (), osec
, ®num
,
2640 sizeof (regnum
), &bfd_offset
);
2643 bfdcore_write (obfd
.get (), osec
,
2644 record_full_get_loc (record_full_list
),
2645 record_full_list
->u
.reg
.len
, &bfd_offset
);
2648 case record_full_mem
: /* mem */
2650 fprintf_unfiltered (gdb_stdlog
,
2651 " Writing memory %s (1 plus "
2652 "%lu plus %lu plus %d bytes)\n",
2654 record_full_list
->u
.mem
.addr
),
2655 (unsigned long) sizeof (addr
),
2656 (unsigned long) sizeof (len
),
2657 record_full_list
->u
.mem
.len
);
2660 len
= netorder32 (record_full_list
->u
.mem
.len
);
2661 bfdcore_write (obfd
.get (), osec
, &len
, sizeof (len
),
2664 /* Write memaddr. */
2665 addr
= netorder64 (record_full_list
->u
.mem
.addr
);
2666 bfdcore_write (obfd
.get (), osec
, &addr
,
2667 sizeof (addr
), &bfd_offset
);
2670 bfdcore_write (obfd
.get (), osec
,
2671 record_full_get_loc (record_full_list
),
2672 record_full_list
->u
.mem
.len
, &bfd_offset
);
2675 case record_full_end
:
2677 fprintf_unfiltered (gdb_stdlog
,
2678 " Writing record_full_end (1 + "
2679 "%lu + %lu bytes)\n",
2680 (unsigned long) sizeof (signal
),
2681 (unsigned long) sizeof (count
));
2682 /* Write signal value. */
2683 signal
= netorder32 (record_full_list
->u
.end
.sigval
);
2684 bfdcore_write (obfd
.get (), osec
, &signal
,
2685 sizeof (signal
), &bfd_offset
);
2687 /* Write insn count. */
2688 count
= netorder32 (record_full_list
->u
.end
.insn_num
);
2689 bfdcore_write (obfd
.get (), osec
, &count
,
2690 sizeof (count
), &bfd_offset
);
2695 /* Execute entry. */
2696 record_full_exec_insn (regcache
, gdbarch
, record_full_list
);
2698 if (record_full_list
->next
)
2699 record_full_list
= record_full_list
->next
;
2704 /* Reverse execute to cur_record_full_list. */
2707 /* Check for beginning and end of log. */
2708 if (record_full_list
== cur_record_full_list
)
2711 record_full_exec_insn (regcache
, gdbarch
, record_full_list
);
2713 if (record_full_list
->prev
)
2714 record_full_list
= record_full_list
->prev
;
2717 unlink_file
.keep ();
2720 printf_filtered (_("Saved core file %s with execution log.\n"),
2724 /* record_full_goto_insn -- rewind the record log (forward or backward,
2725 depending on DIR) to the given entry, changing the program state
2729 record_full_goto_insn (struct record_full_entry
*entry
,
2730 enum exec_direction_kind dir
)
2732 scoped_restore restore_operation_disable
2733 = record_full_gdb_operation_disable_set ();
2734 struct regcache
*regcache
= get_current_regcache ();
2735 struct gdbarch
*gdbarch
= regcache
->arch ();
2737 /* Assume everything is valid: we will hit the entry,
2738 and we will not hit the end of the recording. */
2740 if (dir
== EXEC_FORWARD
)
2741 record_full_list
= record_full_list
->next
;
2745 record_full_exec_insn (regcache
, gdbarch
, record_full_list
);
2746 if (dir
== EXEC_REVERSE
)
2747 record_full_list
= record_full_list
->prev
;
2749 record_full_list
= record_full_list
->next
;
2750 } while (record_full_list
!= entry
);
2753 /* Alias for "target record-full". */
2756 cmd_record_full_start (const char *args
, int from_tty
)
2758 execute_command ("target record-full", from_tty
);
2762 set_record_full_insn_max_num (const char *args
, int from_tty
,
2763 struct cmd_list_element
*c
)
2765 if (record_full_insn_num
> record_full_insn_max_num
)
2767 /* Count down record_full_insn_num while releasing records from list. */
2768 while (record_full_insn_num
> record_full_insn_max_num
)
2770 record_full_list_release_first ();
2771 record_full_insn_num
--;
2776 void _initialize_record_full ();
2778 _initialize_record_full ()
2780 struct cmd_list_element
*c
;
2782 /* Init record_full_first. */
2783 record_full_first
.prev
= NULL
;
2784 record_full_first
.next
= NULL
;
2785 record_full_first
.type
= record_full_end
;
2787 add_target (record_full_target_info
, record_full_open
);
2788 add_deprecated_target_alias (record_full_target_info
, "record");
2789 add_target (record_full_core_target_info
, record_full_open
);
2791 add_prefix_cmd ("full", class_obscure
, cmd_record_full_start
,
2792 _("Start full execution recording."), &record_full_cmdlist
,
2793 "record full ", 0, &record_cmdlist
);
2795 c
= add_cmd ("restore", class_obscure
, cmd_record_full_restore
,
2796 _("Restore the execution log from a file.\n\
2797 Argument is filename. File must be created with 'record save'."),
2798 &record_full_cmdlist
);
2799 set_cmd_completer (c
, filename_completer
);
2801 /* Deprecate the old version without "full" prefix. */
2802 c
= add_alias_cmd ("restore", "full restore", class_obscure
, 1,
2804 set_cmd_completer (c
, filename_completer
);
2805 deprecate_cmd (c
, "record full restore");
2807 add_basic_prefix_cmd ("full", class_support
,
2808 _("Set record options."), &set_record_full_cmdlist
,
2809 "set record full ", 0, &set_record_cmdlist
);
2811 add_show_prefix_cmd ("full", class_support
,
2812 _("Show record options."), &show_record_full_cmdlist
,
2813 "show record full ", 0, &show_record_cmdlist
);
2815 /* Record instructions number limit command. */
2816 add_setshow_boolean_cmd ("stop-at-limit", no_class
,
2817 &record_full_stop_at_limit
, _("\
2818 Set whether record/replay stops when record/replay buffer becomes full."), _("\
2819 Show whether record/replay stops when record/replay buffer becomes full."),
2820 _("Default is ON.\n\
2821 When ON, if the record/replay buffer becomes full, ask user what to do.\n\
2822 When OFF, if the record/replay buffer becomes full,\n\
2823 delete the oldest recorded instruction to make room for each new one."),
2825 &set_record_full_cmdlist
, &show_record_full_cmdlist
);
2827 c
= add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class
, 1,
2828 &set_record_cmdlist
);
2829 deprecate_cmd (c
, "set record full stop-at-limit");
2831 c
= add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class
, 1,
2832 &show_record_cmdlist
);
2833 deprecate_cmd (c
, "show record full stop-at-limit");
2835 add_setshow_uinteger_cmd ("insn-number-max", no_class
,
2836 &record_full_insn_max_num
,
2837 _("Set record/replay buffer limit."),
2838 _("Show record/replay buffer limit."), _("\
2839 Set the maximum number of instructions to be stored in the\n\
2840 record/replay buffer. A value of either \"unlimited\" or zero means no\n\
2841 limit. Default is 200000."),
2842 set_record_full_insn_max_num
,
2843 NULL
, &set_record_full_cmdlist
,
2844 &show_record_full_cmdlist
);
2846 c
= add_alias_cmd ("insn-number-max", "full insn-number-max", no_class
, 1,
2847 &set_record_cmdlist
);
2848 deprecate_cmd (c
, "set record full insn-number-max");
2850 c
= add_alias_cmd ("insn-number-max", "full insn-number-max", no_class
, 1,
2851 &show_record_cmdlist
);
2852 deprecate_cmd (c
, "show record full insn-number-max");
2854 add_setshow_boolean_cmd ("memory-query", no_class
,
2855 &record_full_memory_query
, _("\
2856 Set whether query if PREC cannot record memory change of next instruction."),
2858 Show whether query if PREC cannot record memory change of next instruction."),
2861 When ON, query if PREC cannot record memory change of next instruction."),
2863 &set_record_full_cmdlist
,
2864 &show_record_full_cmdlist
);
2866 c
= add_alias_cmd ("memory-query", "full memory-query", no_class
, 1,
2867 &set_record_cmdlist
);
2868 deprecate_cmd (c
, "set record full memory-query");
2870 c
= add_alias_cmd ("memory-query", "full memory-query", no_class
, 1,
2871 &show_record_cmdlist
);
2872 deprecate_cmd (c
, "show record full memory-query");