| 1 | /* Process record and replay target for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 2008, 2009 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 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. |
| 11 | |
| 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. |
| 16 | |
| 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/>. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "gdbcmd.h" |
| 22 | #include "regcache.h" |
| 23 | #include "gdbthread.h" |
| 24 | #include "event-top.h" |
| 25 | #include "exceptions.h" |
| 26 | #include "record.h" |
| 27 | |
| 28 | #include <signal.h> |
| 29 | |
| 30 | #define DEFAULT_RECORD_INSN_MAX_NUM 200000 |
| 31 | |
| 32 | #define RECORD_IS_REPLAY \ |
| 33 | (record_list->next || execution_direction == EXEC_REVERSE) |
| 34 | |
| 35 | /* These are the core structs of the process record functionality. |
| 36 | |
| 37 | A record_entry is a record of the value change of a register |
| 38 | ("record_reg") or a part of memory ("record_mem"). And each |
| 39 | instruction must have a struct record_entry ("record_end") that |
| 40 | indicates that this is the last struct record_entry of this |
| 41 | instruction. |
| 42 | |
| 43 | Each struct record_entry is linked to "record_list" by "prev" and |
| 44 | "next" pointers. */ |
| 45 | |
| 46 | struct record_reg_entry |
| 47 | { |
| 48 | int num; |
| 49 | gdb_byte *val; |
| 50 | }; |
| 51 | |
| 52 | struct record_mem_entry |
| 53 | { |
| 54 | CORE_ADDR addr; |
| 55 | int len; |
| 56 | /* Set this flag if target memory for this entry |
| 57 | can no longer be accessed. */ |
| 58 | int mem_entry_not_accessible; |
| 59 | gdb_byte *val; |
| 60 | }; |
| 61 | |
| 62 | struct record_end_entry |
| 63 | { |
| 64 | enum target_signal sigval; |
| 65 | }; |
| 66 | |
| 67 | enum record_type |
| 68 | { |
| 69 | record_end = 0, |
| 70 | record_reg, |
| 71 | record_mem |
| 72 | }; |
| 73 | |
| 74 | struct record_entry |
| 75 | { |
| 76 | struct record_entry *prev; |
| 77 | struct record_entry *next; |
| 78 | enum record_type type; |
| 79 | union |
| 80 | { |
| 81 | /* reg */ |
| 82 | struct record_reg_entry reg; |
| 83 | /* mem */ |
| 84 | struct record_mem_entry mem; |
| 85 | /* end */ |
| 86 | struct record_end_entry end; |
| 87 | } u; |
| 88 | }; |
| 89 | |
| 90 | /* This is the debug switch for process record. */ |
| 91 | int record_debug = 0; |
| 92 | |
| 93 | /* These list is for execution log. */ |
| 94 | static struct record_entry record_first; |
| 95 | static struct record_entry *record_list = &record_first; |
| 96 | static struct record_entry *record_arch_list_head = NULL; |
| 97 | static struct record_entry *record_arch_list_tail = NULL; |
| 98 | |
| 99 | /* 1 ask user. 0 auto delete the last struct record_entry. */ |
| 100 | static int record_stop_at_limit = 1; |
| 101 | static int record_insn_max_num = DEFAULT_RECORD_INSN_MAX_NUM; |
| 102 | static int record_insn_num = 0; |
| 103 | |
| 104 | /* The target_ops of process record. */ |
| 105 | static struct target_ops record_ops; |
| 106 | |
| 107 | /* The beneath function pointers. */ |
| 108 | static struct target_ops *record_beneath_to_resume_ops; |
| 109 | static void (*record_beneath_to_resume) (struct target_ops *, ptid_t, int, |
| 110 | enum target_signal); |
| 111 | static struct target_ops *record_beneath_to_wait_ops; |
| 112 | static ptid_t (*record_beneath_to_wait) (struct target_ops *, ptid_t, |
| 113 | struct target_waitstatus *, |
| 114 | int); |
| 115 | static struct target_ops *record_beneath_to_store_registers_ops; |
| 116 | static void (*record_beneath_to_store_registers) (struct target_ops *, |
| 117 | struct regcache *, |
| 118 | int regno); |
| 119 | static struct target_ops *record_beneath_to_xfer_partial_ops; |
| 120 | static LONGEST (*record_beneath_to_xfer_partial) (struct target_ops *ops, |
| 121 | enum target_object object, |
| 122 | const char *annex, |
| 123 | gdb_byte *readbuf, |
| 124 | const gdb_byte *writebuf, |
| 125 | ULONGEST offset, |
| 126 | LONGEST len); |
| 127 | static int (*record_beneath_to_insert_breakpoint) (struct gdbarch *, |
| 128 | struct bp_target_info *); |
| 129 | static int (*record_beneath_to_remove_breakpoint) (struct gdbarch *, |
| 130 | struct bp_target_info *); |
| 131 | |
| 132 | static void |
| 133 | record_list_release (struct record_entry *rec) |
| 134 | { |
| 135 | struct record_entry *tmp; |
| 136 | |
| 137 | if (!rec) |
| 138 | return; |
| 139 | |
| 140 | while (rec->next) |
| 141 | { |
| 142 | rec = rec->next; |
| 143 | } |
| 144 | |
| 145 | while (rec->prev) |
| 146 | { |
| 147 | tmp = rec; |
| 148 | rec = rec->prev; |
| 149 | if (tmp->type == record_reg) |
| 150 | xfree (tmp->u.reg.val); |
| 151 | else if (tmp->type == record_mem) |
| 152 | xfree (tmp->u.mem.val); |
| 153 | xfree (tmp); |
| 154 | } |
| 155 | |
| 156 | if (rec != &record_first) |
| 157 | xfree (rec); |
| 158 | } |
| 159 | |
| 160 | static void |
| 161 | record_list_release_next (void) |
| 162 | { |
| 163 | struct record_entry *rec = record_list; |
| 164 | struct record_entry *tmp = rec->next; |
| 165 | rec->next = NULL; |
| 166 | while (tmp) |
| 167 | { |
| 168 | rec = tmp->next; |
| 169 | if (tmp->type == record_end) |
| 170 | record_insn_num--; |
| 171 | else if (tmp->type == record_reg) |
| 172 | xfree (tmp->u.reg.val); |
| 173 | else if (tmp->type == record_mem) |
| 174 | xfree (tmp->u.mem.val); |
| 175 | xfree (tmp); |
| 176 | tmp = rec; |
| 177 | } |
| 178 | } |
| 179 | |
| 180 | static void |
| 181 | record_list_release_first (void) |
| 182 | { |
| 183 | struct record_entry *tmp = NULL; |
| 184 | enum record_type type; |
| 185 | |
| 186 | if (!record_first.next) |
| 187 | return; |
| 188 | |
| 189 | while (1) |
| 190 | { |
| 191 | type = record_first.next->type; |
| 192 | |
| 193 | if (type == record_reg) |
| 194 | xfree (record_first.next->u.reg.val); |
| 195 | else if (type == record_mem) |
| 196 | xfree (record_first.next->u.mem.val); |
| 197 | tmp = record_first.next; |
| 198 | record_first.next = tmp->next; |
| 199 | xfree (tmp); |
| 200 | |
| 201 | if (!record_first.next) |
| 202 | { |
| 203 | gdb_assert (record_insn_num == 1); |
| 204 | break; |
| 205 | } |
| 206 | |
| 207 | record_first.next->prev = &record_first; |
| 208 | |
| 209 | if (type == record_end) |
| 210 | break; |
| 211 | } |
| 212 | |
| 213 | record_insn_num--; |
| 214 | } |
| 215 | |
| 216 | /* Add a struct record_entry to record_arch_list. */ |
| 217 | |
| 218 | static void |
| 219 | record_arch_list_add (struct record_entry *rec) |
| 220 | { |
| 221 | if (record_debug > 1) |
| 222 | fprintf_unfiltered (gdb_stdlog, |
| 223 | "Process record: record_arch_list_add %s.\n", |
| 224 | host_address_to_string (rec)); |
| 225 | |
| 226 | if (record_arch_list_tail) |
| 227 | { |
| 228 | record_arch_list_tail->next = rec; |
| 229 | rec->prev = record_arch_list_tail; |
| 230 | record_arch_list_tail = rec; |
| 231 | } |
| 232 | else |
| 233 | { |
| 234 | record_arch_list_head = rec; |
| 235 | record_arch_list_tail = rec; |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | /* Record the value of a register NUM to record_arch_list. */ |
| 240 | |
| 241 | int |
| 242 | record_arch_list_add_reg (struct regcache *regcache, int num) |
| 243 | { |
| 244 | struct record_entry *rec; |
| 245 | |
| 246 | if (record_debug > 1) |
| 247 | fprintf_unfiltered (gdb_stdlog, |
| 248 | "Process record: add register num = %d to " |
| 249 | "record list.\n", |
| 250 | num); |
| 251 | |
| 252 | rec = (struct record_entry *) xmalloc (sizeof (struct record_entry)); |
| 253 | rec->u.reg.val = (gdb_byte *) xmalloc (MAX_REGISTER_SIZE); |
| 254 | rec->prev = NULL; |
| 255 | rec->next = NULL; |
| 256 | rec->type = record_reg; |
| 257 | rec->u.reg.num = num; |
| 258 | |
| 259 | regcache_raw_read (regcache, num, rec->u.reg.val); |
| 260 | |
| 261 | record_arch_list_add (rec); |
| 262 | |
| 263 | return 0; |
| 264 | } |
| 265 | |
| 266 | /* Record the value of a region of memory whose address is ADDR and |
| 267 | length is LEN to record_arch_list. */ |
| 268 | |
| 269 | int |
| 270 | record_arch_list_add_mem (CORE_ADDR addr, int len) |
| 271 | { |
| 272 | struct record_entry *rec; |
| 273 | |
| 274 | if (record_debug > 1) |
| 275 | fprintf_unfiltered (gdb_stdlog, |
| 276 | "Process record: add mem addr = %s len = %d to " |
| 277 | "record list.\n", |
| 278 | paddress (target_gdbarch, addr), len); |
| 279 | |
| 280 | if (!addr) |
| 281 | return 0; |
| 282 | |
| 283 | rec = (struct record_entry *) xmalloc (sizeof (struct record_entry)); |
| 284 | rec->u.mem.val = (gdb_byte *) xmalloc (len); |
| 285 | rec->prev = NULL; |
| 286 | rec->next = NULL; |
| 287 | rec->type = record_mem; |
| 288 | rec->u.mem.addr = addr; |
| 289 | rec->u.mem.len = len; |
| 290 | rec->u.mem.mem_entry_not_accessible = 0; |
| 291 | |
| 292 | if (target_read_memory (addr, rec->u.mem.val, len)) |
| 293 | { |
| 294 | if (record_debug) |
| 295 | fprintf_unfiltered (gdb_stdlog, |
| 296 | "Process record: error reading memory at " |
| 297 | "addr = %s len = %d.\n", |
| 298 | paddress (target_gdbarch, addr), len); |
| 299 | xfree (rec->u.mem.val); |
| 300 | xfree (rec); |
| 301 | return -1; |
| 302 | } |
| 303 | |
| 304 | record_arch_list_add (rec); |
| 305 | |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | /* Add a record_end type struct record_entry to record_arch_list. */ |
| 310 | |
| 311 | int |
| 312 | record_arch_list_add_end (void) |
| 313 | { |
| 314 | struct record_entry *rec; |
| 315 | |
| 316 | if (record_debug > 1) |
| 317 | fprintf_unfiltered (gdb_stdlog, |
| 318 | "Process record: add end to arch list.\n"); |
| 319 | |
| 320 | rec = (struct record_entry *) xmalloc (sizeof (struct record_entry)); |
| 321 | rec->prev = NULL; |
| 322 | rec->next = NULL; |
| 323 | rec->type = record_end; |
| 324 | rec->u.end.sigval = TARGET_SIGNAL_0; |
| 325 | |
| 326 | record_arch_list_add (rec); |
| 327 | |
| 328 | return 0; |
| 329 | } |
| 330 | |
| 331 | static void |
| 332 | record_check_insn_num (int set_terminal) |
| 333 | { |
| 334 | if (record_insn_max_num) |
| 335 | { |
| 336 | gdb_assert (record_insn_num <= record_insn_max_num); |
| 337 | if (record_insn_num == record_insn_max_num) |
| 338 | { |
| 339 | /* Ask user what to do. */ |
| 340 | if (record_stop_at_limit) |
| 341 | { |
| 342 | int q; |
| 343 | if (set_terminal) |
| 344 | target_terminal_ours (); |
| 345 | q = yquery (_("Do you want to auto delete previous execution " |
| 346 | "log entries when record/replay buffer becomes " |
| 347 | "full (record stop-at-limit)?")); |
| 348 | if (set_terminal) |
| 349 | target_terminal_inferior (); |
| 350 | if (q) |
| 351 | record_stop_at_limit = 0; |
| 352 | else |
| 353 | error (_("Process record: inferior program stopped.")); |
| 354 | } |
| 355 | } |
| 356 | } |
| 357 | } |
| 358 | |
| 359 | /* Before inferior step (when GDB record the running message, inferior |
| 360 | only can step), GDB will call this function to record the values to |
| 361 | record_list. This function will call gdbarch_process_record to |
| 362 | record the running message of inferior and set them to |
| 363 | record_arch_list, and add it to record_list. */ |
| 364 | |
| 365 | static void |
| 366 | record_message_cleanups (void *ignore) |
| 367 | { |
| 368 | record_list_release (record_arch_list_tail); |
| 369 | } |
| 370 | |
| 371 | struct record_message_args { |
| 372 | struct regcache *regcache; |
| 373 | enum target_signal signal; |
| 374 | }; |
| 375 | |
| 376 | static int |
| 377 | record_message (void *args) |
| 378 | { |
| 379 | int ret; |
| 380 | struct record_message_args *myargs = args; |
| 381 | struct gdbarch *gdbarch = get_regcache_arch (myargs->regcache); |
| 382 | struct cleanup *old_cleanups = make_cleanup (record_message_cleanups, 0); |
| 383 | |
| 384 | record_arch_list_head = NULL; |
| 385 | record_arch_list_tail = NULL; |
| 386 | |
| 387 | /* Check record_insn_num. */ |
| 388 | record_check_insn_num (1); |
| 389 | |
| 390 | /* If gdb sends a signal value to target_resume, |
| 391 | save it in the 'end' field of the previous instruction. |
| 392 | |
| 393 | Maybe process record should record what really happened, |
| 394 | rather than what gdb pretends has happened. |
| 395 | |
| 396 | So if Linux delivered the signal to the child process during |
| 397 | the record mode, we will record it and deliver it again in |
| 398 | the replay mode. |
| 399 | |
| 400 | If user says "ignore this signal" during the record mode, then |
| 401 | it will be ignored again during the replay mode (no matter if |
| 402 | the user says something different, like "deliver this signal" |
| 403 | during the replay mode). |
| 404 | |
| 405 | User should understand that nothing he does during the replay |
| 406 | mode will change the behavior of the child. If he tries, |
| 407 | then that is a user error. |
| 408 | |
| 409 | But we should still deliver the signal to gdb during the replay, |
| 410 | if we delivered it during the recording. Therefore we should |
| 411 | record the signal during record_wait, not record_resume. */ |
| 412 | if (record_list != &record_first) /* FIXME better way to check */ |
| 413 | { |
| 414 | gdb_assert (record_list->type == record_end); |
| 415 | record_list->u.end.sigval = myargs->signal; |
| 416 | } |
| 417 | |
| 418 | if (myargs->signal == TARGET_SIGNAL_0 |
| 419 | || !gdbarch_process_record_signal_p (gdbarch)) |
| 420 | ret = gdbarch_process_record (gdbarch, |
| 421 | myargs->regcache, |
| 422 | regcache_read_pc (myargs->regcache)); |
| 423 | else |
| 424 | ret = gdbarch_process_record_signal (gdbarch, |
| 425 | myargs->regcache, |
| 426 | myargs->signal); |
| 427 | |
| 428 | if (ret > 0) |
| 429 | error (_("Process record: inferior program stopped.")); |
| 430 | if (ret < 0) |
| 431 | error (_("Process record: failed to record execution log.")); |
| 432 | |
| 433 | discard_cleanups (old_cleanups); |
| 434 | |
| 435 | record_list->next = record_arch_list_head; |
| 436 | record_arch_list_head->prev = record_list; |
| 437 | record_list = record_arch_list_tail; |
| 438 | |
| 439 | if (record_insn_num == record_insn_max_num && record_insn_max_num) |
| 440 | record_list_release_first (); |
| 441 | else |
| 442 | record_insn_num++; |
| 443 | |
| 444 | return 1; |
| 445 | } |
| 446 | |
| 447 | static int |
| 448 | do_record_message (struct regcache *regcache, |
| 449 | enum target_signal signal) |
| 450 | { |
| 451 | struct record_message_args args; |
| 452 | |
| 453 | args.regcache = regcache; |
| 454 | args.signal = signal; |
| 455 | return catch_errors (record_message, &args, NULL, RETURN_MASK_ALL); |
| 456 | } |
| 457 | |
| 458 | /* Set to 1 if record_store_registers and record_xfer_partial |
| 459 | doesn't need record. */ |
| 460 | |
| 461 | static int record_gdb_operation_disable = 0; |
| 462 | |
| 463 | struct cleanup * |
| 464 | record_gdb_operation_disable_set (void) |
| 465 | { |
| 466 | struct cleanup *old_cleanups = NULL; |
| 467 | |
| 468 | old_cleanups = |
| 469 | make_cleanup_restore_integer (&record_gdb_operation_disable); |
| 470 | record_gdb_operation_disable = 1; |
| 471 | |
| 472 | return old_cleanups; |
| 473 | } |
| 474 | |
| 475 | static void |
| 476 | record_open (char *name, int from_tty) |
| 477 | { |
| 478 | struct target_ops *t; |
| 479 | |
| 480 | if (record_debug) |
| 481 | fprintf_unfiltered (gdb_stdlog, "Process record: record_open\n"); |
| 482 | |
| 483 | /* check exec */ |
| 484 | if (!target_has_execution) |
| 485 | error (_("Process record: the program is not being run.")); |
| 486 | if (non_stop) |
| 487 | error (_("Process record target can't debug inferior in non-stop mode " |
| 488 | "(non-stop).")); |
| 489 | if (target_async_permitted) |
| 490 | error (_("Process record target can't debug inferior in asynchronous " |
| 491 | "mode (target-async).")); |
| 492 | |
| 493 | if (!gdbarch_process_record_p (target_gdbarch)) |
| 494 | error (_("Process record: the current architecture doesn't support " |
| 495 | "record function.")); |
| 496 | |
| 497 | /* Check if record target is already running. */ |
| 498 | if (current_target.to_stratum == record_stratum) |
| 499 | error (_("Process record target already running. Use \"record stop\" to " |
| 500 | "stop record target first.")); |
| 501 | |
| 502 | /*Reset the beneath function pointers. */ |
| 503 | record_beneath_to_resume = NULL; |
| 504 | record_beneath_to_wait = NULL; |
| 505 | record_beneath_to_store_registers = NULL; |
| 506 | record_beneath_to_xfer_partial = NULL; |
| 507 | record_beneath_to_insert_breakpoint = NULL; |
| 508 | record_beneath_to_remove_breakpoint = NULL; |
| 509 | |
| 510 | /* Set the beneath function pointers. */ |
| 511 | for (t = current_target.beneath; t != NULL; t = t->beneath) |
| 512 | { |
| 513 | if (!record_beneath_to_resume) |
| 514 | { |
| 515 | record_beneath_to_resume = t->to_resume; |
| 516 | record_beneath_to_resume_ops = t; |
| 517 | } |
| 518 | if (!record_beneath_to_wait) |
| 519 | { |
| 520 | record_beneath_to_wait = t->to_wait; |
| 521 | record_beneath_to_wait_ops = t; |
| 522 | } |
| 523 | if (!record_beneath_to_store_registers) |
| 524 | { |
| 525 | record_beneath_to_store_registers = t->to_store_registers; |
| 526 | record_beneath_to_store_registers_ops = t; |
| 527 | } |
| 528 | if (!record_beneath_to_xfer_partial) |
| 529 | { |
| 530 | record_beneath_to_xfer_partial = t->to_xfer_partial; |
| 531 | record_beneath_to_xfer_partial_ops = t; |
| 532 | } |
| 533 | if (!record_beneath_to_insert_breakpoint) |
| 534 | record_beneath_to_insert_breakpoint = t->to_insert_breakpoint; |
| 535 | if (!record_beneath_to_remove_breakpoint) |
| 536 | record_beneath_to_remove_breakpoint = t->to_remove_breakpoint; |
| 537 | } |
| 538 | if (!record_beneath_to_resume) |
| 539 | error (_("Process record can't get to_resume.")); |
| 540 | if (!record_beneath_to_wait) |
| 541 | error (_("Process record can't get to_wait.")); |
| 542 | if (!record_beneath_to_store_registers) |
| 543 | error (_("Process record can't get to_store_registers.")); |
| 544 | if (!record_beneath_to_xfer_partial) |
| 545 | error (_("Process record can't get to_xfer_partial.")); |
| 546 | if (!record_beneath_to_insert_breakpoint) |
| 547 | error (_("Process record can't get to_insert_breakpoint.")); |
| 548 | if (!record_beneath_to_remove_breakpoint) |
| 549 | error (_("Process record can't get to_remove_breakpoint.")); |
| 550 | |
| 551 | push_target (&record_ops); |
| 552 | |
| 553 | /* Reset */ |
| 554 | record_insn_num = 0; |
| 555 | record_list = &record_first; |
| 556 | record_list->next = NULL; |
| 557 | } |
| 558 | |
| 559 | static void |
| 560 | record_close (int quitting) |
| 561 | { |
| 562 | if (record_debug) |
| 563 | fprintf_unfiltered (gdb_stdlog, "Process record: record_close\n"); |
| 564 | |
| 565 | record_list_release (record_list); |
| 566 | } |
| 567 | |
| 568 | static int record_resume_step = 0; |
| 569 | static int record_resume_error; |
| 570 | |
| 571 | static void |
| 572 | record_resume (struct target_ops *ops, ptid_t ptid, int step, |
| 573 | enum target_signal signal) |
| 574 | { |
| 575 | record_resume_step = step; |
| 576 | |
| 577 | if (!RECORD_IS_REPLAY) |
| 578 | { |
| 579 | if (do_record_message (get_current_regcache (), signal)) |
| 580 | { |
| 581 | record_resume_error = 0; |
| 582 | } |
| 583 | else |
| 584 | { |
| 585 | record_resume_error = 1; |
| 586 | return; |
| 587 | } |
| 588 | record_beneath_to_resume (record_beneath_to_resume_ops, ptid, 1, |
| 589 | signal); |
| 590 | } |
| 591 | } |
| 592 | |
| 593 | static int record_get_sig = 0; |
| 594 | |
| 595 | static void |
| 596 | record_sig_handler (int signo) |
| 597 | { |
| 598 | if (record_debug) |
| 599 | fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\n"); |
| 600 | |
| 601 | /* It will break the running inferior in replay mode. */ |
| 602 | record_resume_step = 1; |
| 603 | |
| 604 | /* It will let record_wait set inferior status to get the signal |
| 605 | SIGINT. */ |
| 606 | record_get_sig = 1; |
| 607 | } |
| 608 | |
| 609 | static void |
| 610 | record_wait_cleanups (void *ignore) |
| 611 | { |
| 612 | if (execution_direction == EXEC_REVERSE) |
| 613 | { |
| 614 | if (record_list->next) |
| 615 | record_list = record_list->next; |
| 616 | } |
| 617 | else |
| 618 | record_list = record_list->prev; |
| 619 | } |
| 620 | |
| 621 | /* In replay mode, this function examines the recorded log and |
| 622 | determines where to stop. */ |
| 623 | |
| 624 | static ptid_t |
| 625 | record_wait (struct target_ops *ops, |
| 626 | ptid_t ptid, struct target_waitstatus *status, |
| 627 | int options) |
| 628 | { |
| 629 | struct cleanup *set_cleanups = record_gdb_operation_disable_set (); |
| 630 | |
| 631 | if (record_debug) |
| 632 | fprintf_unfiltered (gdb_stdlog, |
| 633 | "Process record: record_wait " |
| 634 | "record_resume_step = %d\n", |
| 635 | record_resume_step); |
| 636 | |
| 637 | if (!RECORD_IS_REPLAY) |
| 638 | { |
| 639 | if (record_resume_error) |
| 640 | { |
| 641 | /* If record_resume get error, return directly. */ |
| 642 | status->kind = TARGET_WAITKIND_STOPPED; |
| 643 | status->value.sig = TARGET_SIGNAL_ABRT; |
| 644 | return inferior_ptid; |
| 645 | } |
| 646 | |
| 647 | if (record_resume_step) |
| 648 | { |
| 649 | /* This is a single step. */ |
| 650 | return record_beneath_to_wait (record_beneath_to_wait_ops, |
| 651 | ptid, status, options); |
| 652 | } |
| 653 | else |
| 654 | { |
| 655 | /* This is not a single step. */ |
| 656 | ptid_t ret; |
| 657 | CORE_ADDR tmp_pc; |
| 658 | |
| 659 | while (1) |
| 660 | { |
| 661 | ret = record_beneath_to_wait (record_beneath_to_wait_ops, |
| 662 | ptid, status, options); |
| 663 | |
| 664 | /* Is this a SIGTRAP? */ |
| 665 | if (status->kind == TARGET_WAITKIND_STOPPED |
| 666 | && status->value.sig == TARGET_SIGNAL_TRAP) |
| 667 | { |
| 668 | /* Yes -- check if there is a breakpoint. */ |
| 669 | registers_changed (); |
| 670 | tmp_pc = regcache_read_pc (get_current_regcache ()); |
| 671 | if (breakpoint_inserted_here_p (tmp_pc)) |
| 672 | { |
| 673 | /* There is a breakpoint. GDB will want to stop. */ |
| 674 | CORE_ADDR decr_pc_after_break = |
| 675 | gdbarch_decr_pc_after_break |
| 676 | (get_regcache_arch (get_current_regcache ())); |
| 677 | if (decr_pc_after_break) |
| 678 | { |
| 679 | regcache_write_pc (get_thread_regcache (ret), |
| 680 | tmp_pc + decr_pc_after_break); |
| 681 | } |
| 682 | } |
| 683 | else |
| 684 | { |
| 685 | /* There is not a breakpoint, and gdb is not |
| 686 | stepping, therefore gdb will not stop. |
| 687 | Therefore we will not return to gdb. |
| 688 | Record the insn and resume. */ |
| 689 | if (!do_record_message (get_current_regcache (), |
| 690 | TARGET_SIGNAL_0)) |
| 691 | { |
| 692 | break; |
| 693 | } |
| 694 | record_beneath_to_resume (record_beneath_to_resume_ops, |
| 695 | ptid, 1, |
| 696 | TARGET_SIGNAL_0); |
| 697 | continue; |
| 698 | } |
| 699 | } |
| 700 | |
| 701 | /* The inferior is broken by a breakpoint or a signal. */ |
| 702 | break; |
| 703 | } |
| 704 | |
| 705 | return ret; |
| 706 | } |
| 707 | } |
| 708 | else |
| 709 | { |
| 710 | struct regcache *regcache = get_current_regcache (); |
| 711 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 712 | int continue_flag = 1; |
| 713 | int first_record_end = 1; |
| 714 | struct cleanup *old_cleanups = make_cleanup (record_wait_cleanups, 0); |
| 715 | CORE_ADDR tmp_pc; |
| 716 | |
| 717 | status->kind = TARGET_WAITKIND_STOPPED; |
| 718 | |
| 719 | /* Check breakpoint when forward execute. */ |
| 720 | if (execution_direction == EXEC_FORWARD) |
| 721 | { |
| 722 | tmp_pc = regcache_read_pc (regcache); |
| 723 | if (breakpoint_inserted_here_p (tmp_pc)) |
| 724 | { |
| 725 | if (record_debug) |
| 726 | fprintf_unfiltered (gdb_stdlog, |
| 727 | "Process record: break at %s.\n", |
| 728 | paddress (gdbarch, tmp_pc)); |
| 729 | if (gdbarch_decr_pc_after_break (gdbarch) |
| 730 | && !record_resume_step) |
| 731 | regcache_write_pc (regcache, |
| 732 | tmp_pc + |
| 733 | gdbarch_decr_pc_after_break (gdbarch)); |
| 734 | goto replay_out; |
| 735 | } |
| 736 | } |
| 737 | |
| 738 | record_get_sig = 0; |
| 739 | signal (SIGINT, record_sig_handler); |
| 740 | /* If GDB is in terminal_inferior mode, it will not get the signal. |
| 741 | And in GDB replay mode, GDB doesn't need to be in terminal_inferior |
| 742 | mode, because inferior will not executed. |
| 743 | Then set it to terminal_ours to make GDB get the signal. */ |
| 744 | target_terminal_ours (); |
| 745 | |
| 746 | /* In EXEC_FORWARD mode, record_list points to the tail of prev |
| 747 | instruction. */ |
| 748 | if (execution_direction == EXEC_FORWARD && record_list->next) |
| 749 | record_list = record_list->next; |
| 750 | |
| 751 | /* Loop over the record_list, looking for the next place to |
| 752 | stop. */ |
| 753 | do |
| 754 | { |
| 755 | /* Check for beginning and end of log. */ |
| 756 | if (execution_direction == EXEC_REVERSE |
| 757 | && record_list == &record_first) |
| 758 | { |
| 759 | /* Hit beginning of record log in reverse. */ |
| 760 | status->kind = TARGET_WAITKIND_NO_HISTORY; |
| 761 | break; |
| 762 | } |
| 763 | if (execution_direction != EXEC_REVERSE && !record_list->next) |
| 764 | { |
| 765 | /* Hit end of record log going forward. */ |
| 766 | status->kind = TARGET_WAITKIND_NO_HISTORY; |
| 767 | break; |
| 768 | } |
| 769 | |
| 770 | /* Set ptid, register and memory according to record_list. */ |
| 771 | if (record_list->type == record_reg) |
| 772 | { |
| 773 | /* reg */ |
| 774 | gdb_byte reg[MAX_REGISTER_SIZE]; |
| 775 | if (record_debug > 1) |
| 776 | fprintf_unfiltered (gdb_stdlog, |
| 777 | "Process record: record_reg %s to " |
| 778 | "inferior num = %d.\n", |
| 779 | host_address_to_string (record_list), |
| 780 | record_list->u.reg.num); |
| 781 | regcache_cooked_read (regcache, record_list->u.reg.num, reg); |
| 782 | regcache_cooked_write (regcache, record_list->u.reg.num, |
| 783 | record_list->u.reg.val); |
| 784 | memcpy (record_list->u.reg.val, reg, MAX_REGISTER_SIZE); |
| 785 | } |
| 786 | else if (record_list->type == record_mem) |
| 787 | { |
| 788 | /* mem */ |
| 789 | /* Nothing to do if the entry is flagged not_accessible. */ |
| 790 | if (!record_list->u.mem.mem_entry_not_accessible) |
| 791 | { |
| 792 | gdb_byte *mem = alloca (record_list->u.mem.len); |
| 793 | if (record_debug > 1) |
| 794 | fprintf_unfiltered (gdb_stdlog, |
| 795 | "Process record: record_mem %s to " |
| 796 | "inferior addr = %s len = %d.\n", |
| 797 | host_address_to_string (record_list), |
| 798 | paddress (gdbarch, |
| 799 | record_list->u.mem.addr), |
| 800 | record_list->u.mem.len); |
| 801 | |
| 802 | if (target_read_memory (record_list->u.mem.addr, mem, |
| 803 | record_list->u.mem.len)) |
| 804 | { |
| 805 | if (execution_direction != EXEC_REVERSE) |
| 806 | error (_("Process record: error reading memory at " |
| 807 | "addr = %s len = %d."), |
| 808 | paddress (gdbarch, record_list->u.mem.addr), |
| 809 | record_list->u.mem.len); |
| 810 | else |
| 811 | /* Read failed -- |
| 812 | flag entry as not_accessible. */ |
| 813 | record_list->u.mem.mem_entry_not_accessible = 1; |
| 814 | } |
| 815 | else |
| 816 | { |
| 817 | if (target_write_memory (record_list->u.mem.addr, |
| 818 | record_list->u.mem.val, |
| 819 | record_list->u.mem.len)) |
| 820 | { |
| 821 | if (execution_direction != EXEC_REVERSE) |
| 822 | error (_("Process record: error writing memory at " |
| 823 | "addr = %s len = %d."), |
| 824 | paddress (gdbarch, record_list->u.mem.addr), |
| 825 | record_list->u.mem.len); |
| 826 | else |
| 827 | /* Write failed -- |
| 828 | flag entry as not_accessible. */ |
| 829 | record_list->u.mem.mem_entry_not_accessible = 1; |
| 830 | } |
| 831 | else |
| 832 | { |
| 833 | memcpy (record_list->u.mem.val, mem, |
| 834 | record_list->u.mem.len); |
| 835 | } |
| 836 | } |
| 837 | } |
| 838 | } |
| 839 | else |
| 840 | { |
| 841 | if (record_debug > 1) |
| 842 | fprintf_unfiltered (gdb_stdlog, |
| 843 | "Process record: record_end %s to " |
| 844 | "inferior.\n", |
| 845 | host_address_to_string (record_list)); |
| 846 | |
| 847 | if (first_record_end && execution_direction == EXEC_REVERSE) |
| 848 | { |
| 849 | /* When reverse excute, the first record_end is the part of |
| 850 | current instruction. */ |
| 851 | first_record_end = 0; |
| 852 | } |
| 853 | else |
| 854 | { |
| 855 | /* In EXEC_REVERSE mode, this is the record_end of prev |
| 856 | instruction. |
| 857 | In EXEC_FORWARD mode, this is the record_end of current |
| 858 | instruction. */ |
| 859 | /* step */ |
| 860 | if (record_resume_step) |
| 861 | { |
| 862 | if (record_debug > 1) |
| 863 | fprintf_unfiltered (gdb_stdlog, |
| 864 | "Process record: step.\n"); |
| 865 | continue_flag = 0; |
| 866 | } |
| 867 | |
| 868 | /* check breakpoint */ |
| 869 | tmp_pc = regcache_read_pc (regcache); |
| 870 | if (breakpoint_inserted_here_p (tmp_pc)) |
| 871 | { |
| 872 | if (record_debug) |
| 873 | fprintf_unfiltered (gdb_stdlog, |
| 874 | "Process record: break " |
| 875 | "at %s.\n", |
| 876 | paddress (gdbarch, tmp_pc)); |
| 877 | if (gdbarch_decr_pc_after_break (gdbarch) |
| 878 | && execution_direction == EXEC_FORWARD |
| 879 | && !record_resume_step) |
| 880 | regcache_write_pc (regcache, |
| 881 | tmp_pc + |
| 882 | gdbarch_decr_pc_after_break (gdbarch)); |
| 883 | continue_flag = 0; |
| 884 | } |
| 885 | /* Check target signal */ |
| 886 | if (record_list->u.end.sigval != TARGET_SIGNAL_0) |
| 887 | /* FIXME: better way to check */ |
| 888 | continue_flag = 0; |
| 889 | } |
| 890 | } |
| 891 | |
| 892 | if (continue_flag) |
| 893 | { |
| 894 | if (execution_direction == EXEC_REVERSE) |
| 895 | { |
| 896 | if (record_list->prev) |
| 897 | record_list = record_list->prev; |
| 898 | } |
| 899 | else |
| 900 | { |
| 901 | if (record_list->next) |
| 902 | record_list = record_list->next; |
| 903 | } |
| 904 | } |
| 905 | } |
| 906 | while (continue_flag); |
| 907 | |
| 908 | signal (SIGINT, handle_sigint); |
| 909 | |
| 910 | replay_out: |
| 911 | if (record_get_sig) |
| 912 | status->value.sig = TARGET_SIGNAL_INT; |
| 913 | else if (record_list->u.end.sigval != TARGET_SIGNAL_0) |
| 914 | /* FIXME: better way to check */ |
| 915 | status->value.sig = record_list->u.end.sigval; |
| 916 | else |
| 917 | status->value.sig = TARGET_SIGNAL_TRAP; |
| 918 | |
| 919 | discard_cleanups (old_cleanups); |
| 920 | } |
| 921 | |
| 922 | do_cleanups (set_cleanups); |
| 923 | return inferior_ptid; |
| 924 | } |
| 925 | |
| 926 | static void |
| 927 | record_disconnect (struct target_ops *target, char *args, int from_tty) |
| 928 | { |
| 929 | if (record_debug) |
| 930 | fprintf_unfiltered (gdb_stdlog, "Process record: record_disconnect\n"); |
| 931 | |
| 932 | unpush_target (&record_ops); |
| 933 | target_disconnect (args, from_tty); |
| 934 | } |
| 935 | |
| 936 | static void |
| 937 | record_detach (struct target_ops *ops, char *args, int from_tty) |
| 938 | { |
| 939 | if (record_debug) |
| 940 | fprintf_unfiltered (gdb_stdlog, "Process record: record_detach\n"); |
| 941 | |
| 942 | unpush_target (&record_ops); |
| 943 | target_detach (args, from_tty); |
| 944 | } |
| 945 | |
| 946 | static void |
| 947 | record_mourn_inferior (struct target_ops *ops) |
| 948 | { |
| 949 | if (record_debug) |
| 950 | fprintf_unfiltered (gdb_stdlog, "Process record: " |
| 951 | "record_mourn_inferior\n"); |
| 952 | |
| 953 | unpush_target (&record_ops); |
| 954 | target_mourn_inferior (); |
| 955 | } |
| 956 | |
| 957 | /* Close process record target before killing the inferior process. */ |
| 958 | |
| 959 | static void |
| 960 | record_kill (struct target_ops *ops) |
| 961 | { |
| 962 | if (record_debug) |
| 963 | fprintf_unfiltered (gdb_stdlog, "Process record: record_kill\n"); |
| 964 | |
| 965 | unpush_target (&record_ops); |
| 966 | target_kill (); |
| 967 | } |
| 968 | |
| 969 | /* Record registers change (by user or by GDB) to list as an instruction. */ |
| 970 | |
| 971 | static void |
| 972 | record_registers_change (struct regcache *regcache, int regnum) |
| 973 | { |
| 974 | /* Check record_insn_num. */ |
| 975 | record_check_insn_num (0); |
| 976 | |
| 977 | record_arch_list_head = NULL; |
| 978 | record_arch_list_tail = NULL; |
| 979 | |
| 980 | if (regnum < 0) |
| 981 | { |
| 982 | int i; |
| 983 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
| 984 | { |
| 985 | if (record_arch_list_add_reg (regcache, i)) |
| 986 | { |
| 987 | record_list_release (record_arch_list_tail); |
| 988 | error (_("Process record: failed to record execution log.")); |
| 989 | } |
| 990 | } |
| 991 | } |
| 992 | else |
| 993 | { |
| 994 | if (record_arch_list_add_reg (regcache, regnum)) |
| 995 | { |
| 996 | record_list_release (record_arch_list_tail); |
| 997 | error (_("Process record: failed to record execution log.")); |
| 998 | } |
| 999 | } |
| 1000 | if (record_arch_list_add_end ()) |
| 1001 | { |
| 1002 | record_list_release (record_arch_list_tail); |
| 1003 | error (_("Process record: failed to record execution log.")); |
| 1004 | } |
| 1005 | record_list->next = record_arch_list_head; |
| 1006 | record_arch_list_head->prev = record_list; |
| 1007 | record_list = record_arch_list_tail; |
| 1008 | |
| 1009 | if (record_insn_num == record_insn_max_num && record_insn_max_num) |
| 1010 | record_list_release_first (); |
| 1011 | else |
| 1012 | record_insn_num++; |
| 1013 | } |
| 1014 | |
| 1015 | static void |
| 1016 | record_store_registers (struct target_ops *ops, struct regcache *regcache, |
| 1017 | int regno) |
| 1018 | { |
| 1019 | if (!record_gdb_operation_disable) |
| 1020 | { |
| 1021 | if (RECORD_IS_REPLAY) |
| 1022 | { |
| 1023 | int n; |
| 1024 | |
| 1025 | /* Let user choose if he wants to write register or not. */ |
| 1026 | if (regno < 0) |
| 1027 | n = |
| 1028 | query (_("Because GDB is in replay mode, changing the " |
| 1029 | "value of a register will make the execution " |
| 1030 | "log unusable from this point onward. " |
| 1031 | "Change all registers?")); |
| 1032 | else |
| 1033 | n = |
| 1034 | query (_("Because GDB is in replay mode, changing the value " |
| 1035 | "of a register will make the execution log unusable " |
| 1036 | "from this point onward. Change register %s?"), |
| 1037 | gdbarch_register_name (get_regcache_arch (regcache), |
| 1038 | regno)); |
| 1039 | |
| 1040 | if (!n) |
| 1041 | { |
| 1042 | /* Invalidate the value of regcache that was set in function |
| 1043 | "regcache_raw_write". */ |
| 1044 | if (regno < 0) |
| 1045 | { |
| 1046 | int i; |
| 1047 | for (i = 0; |
| 1048 | i < gdbarch_num_regs (get_regcache_arch (regcache)); |
| 1049 | i++) |
| 1050 | regcache_invalidate (regcache, i); |
| 1051 | } |
| 1052 | else |
| 1053 | regcache_invalidate (regcache, regno); |
| 1054 | |
| 1055 | error (_("Process record canceled the operation.")); |
| 1056 | } |
| 1057 | |
| 1058 | /* Destroy the record from here forward. */ |
| 1059 | record_list_release_next (); |
| 1060 | } |
| 1061 | |
| 1062 | record_registers_change (regcache, regno); |
| 1063 | } |
| 1064 | record_beneath_to_store_registers (record_beneath_to_store_registers_ops, |
| 1065 | regcache, regno); |
| 1066 | } |
| 1067 | |
| 1068 | /* Behavior is conditional on RECORD_IS_REPLAY. |
| 1069 | In replay mode, we cannot write memory unles we are willing to |
| 1070 | invalidate the record/replay log from this point forward. */ |
| 1071 | |
| 1072 | static LONGEST |
| 1073 | record_xfer_partial (struct target_ops *ops, enum target_object object, |
| 1074 | const char *annex, gdb_byte *readbuf, |
| 1075 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) |
| 1076 | { |
| 1077 | if (!record_gdb_operation_disable |
| 1078 | && (object == TARGET_OBJECT_MEMORY |
| 1079 | || object == TARGET_OBJECT_RAW_MEMORY) && writebuf) |
| 1080 | { |
| 1081 | if (RECORD_IS_REPLAY) |
| 1082 | { |
| 1083 | /* Let user choose if he wants to write memory or not. */ |
| 1084 | if (!query (_("Because GDB is in replay mode, writing to memory " |
| 1085 | "will make the execution log unusable from this " |
| 1086 | "point onward. Write memory at address %s?"), |
| 1087 | paddress (target_gdbarch, offset))) |
| 1088 | error (_("Process record canceled the operation.")); |
| 1089 | |
| 1090 | /* Destroy the record from here forward. */ |
| 1091 | record_list_release_next (); |
| 1092 | } |
| 1093 | |
| 1094 | /* Check record_insn_num */ |
| 1095 | record_check_insn_num (0); |
| 1096 | |
| 1097 | /* Record registers change to list as an instruction. */ |
| 1098 | record_arch_list_head = NULL; |
| 1099 | record_arch_list_tail = NULL; |
| 1100 | if (record_arch_list_add_mem (offset, len)) |
| 1101 | { |
| 1102 | record_list_release (record_arch_list_tail); |
| 1103 | if (record_debug) |
| 1104 | fprintf_unfiltered (gdb_stdlog, |
| 1105 | _("Process record: failed to record " |
| 1106 | "execution log.")); |
| 1107 | return -1; |
| 1108 | } |
| 1109 | if (record_arch_list_add_end ()) |
| 1110 | { |
| 1111 | record_list_release (record_arch_list_tail); |
| 1112 | if (record_debug) |
| 1113 | fprintf_unfiltered (gdb_stdlog, |
| 1114 | _("Process record: failed to record " |
| 1115 | "execution log.")); |
| 1116 | return -1; |
| 1117 | } |
| 1118 | record_list->next = record_arch_list_head; |
| 1119 | record_arch_list_head->prev = record_list; |
| 1120 | record_list = record_arch_list_tail; |
| 1121 | |
| 1122 | if (record_insn_num == record_insn_max_num && record_insn_max_num) |
| 1123 | record_list_release_first (); |
| 1124 | else |
| 1125 | record_insn_num++; |
| 1126 | } |
| 1127 | |
| 1128 | return record_beneath_to_xfer_partial (record_beneath_to_xfer_partial_ops, |
| 1129 | object, annex, readbuf, writebuf, |
| 1130 | offset, len); |
| 1131 | } |
| 1132 | |
| 1133 | /* Behavior is conditional on RECORD_IS_REPLAY. |
| 1134 | We will not actually insert or remove breakpoints when replaying, |
| 1135 | nor when recording. */ |
| 1136 | |
| 1137 | static int |
| 1138 | record_insert_breakpoint (struct gdbarch *gdbarch, |
| 1139 | struct bp_target_info *bp_tgt) |
| 1140 | { |
| 1141 | if (!RECORD_IS_REPLAY) |
| 1142 | { |
| 1143 | struct cleanup *old_cleanups = record_gdb_operation_disable_set (); |
| 1144 | int ret = record_beneath_to_insert_breakpoint (gdbarch, bp_tgt); |
| 1145 | |
| 1146 | do_cleanups (old_cleanups); |
| 1147 | |
| 1148 | return ret; |
| 1149 | } |
| 1150 | |
| 1151 | return 0; |
| 1152 | } |
| 1153 | |
| 1154 | static int |
| 1155 | record_remove_breakpoint (struct gdbarch *gdbarch, |
| 1156 | struct bp_target_info *bp_tgt) |
| 1157 | { |
| 1158 | if (!RECORD_IS_REPLAY) |
| 1159 | { |
| 1160 | struct cleanup *old_cleanups = record_gdb_operation_disable_set (); |
| 1161 | int ret = record_beneath_to_remove_breakpoint (gdbarch, bp_tgt); |
| 1162 | |
| 1163 | do_cleanups (old_cleanups); |
| 1164 | |
| 1165 | return ret; |
| 1166 | } |
| 1167 | |
| 1168 | return 0; |
| 1169 | } |
| 1170 | |
| 1171 | static int |
| 1172 | record_can_execute_reverse (void) |
| 1173 | { |
| 1174 | return 1; |
| 1175 | } |
| 1176 | |
| 1177 | static void |
| 1178 | init_record_ops (void) |
| 1179 | { |
| 1180 | record_ops.to_shortname = "record"; |
| 1181 | record_ops.to_longname = "Process record and replay target"; |
| 1182 | record_ops.to_doc = |
| 1183 | "Log program while executing and replay execution from log."; |
| 1184 | record_ops.to_open = record_open; |
| 1185 | record_ops.to_close = record_close; |
| 1186 | record_ops.to_resume = record_resume; |
| 1187 | record_ops.to_wait = record_wait; |
| 1188 | record_ops.to_disconnect = record_disconnect; |
| 1189 | record_ops.to_detach = record_detach; |
| 1190 | record_ops.to_mourn_inferior = record_mourn_inferior; |
| 1191 | record_ops.to_kill = record_kill; |
| 1192 | record_ops.to_create_inferior = find_default_create_inferior; |
| 1193 | record_ops.to_store_registers = record_store_registers; |
| 1194 | record_ops.to_xfer_partial = record_xfer_partial; |
| 1195 | record_ops.to_insert_breakpoint = record_insert_breakpoint; |
| 1196 | record_ops.to_remove_breakpoint = record_remove_breakpoint; |
| 1197 | record_ops.to_can_execute_reverse = record_can_execute_reverse; |
| 1198 | record_ops.to_stratum = record_stratum; |
| 1199 | record_ops.to_magic = OPS_MAGIC; |
| 1200 | } |
| 1201 | |
| 1202 | static void |
| 1203 | show_record_debug (struct ui_file *file, int from_tty, |
| 1204 | struct cmd_list_element *c, const char *value) |
| 1205 | { |
| 1206 | fprintf_filtered (file, _("Debugging of process record target is %s.\n"), |
| 1207 | value); |
| 1208 | } |
| 1209 | |
| 1210 | /* Alias for "target record". */ |
| 1211 | |
| 1212 | static void |
| 1213 | cmd_record_start (char *args, int from_tty) |
| 1214 | { |
| 1215 | execute_command ("target record", from_tty); |
| 1216 | } |
| 1217 | |
| 1218 | /* Truncate the record log from the present point |
| 1219 | of replay until the end. */ |
| 1220 | |
| 1221 | static void |
| 1222 | cmd_record_delete (char *args, int from_tty) |
| 1223 | { |
| 1224 | if (current_target.to_stratum == record_stratum) |
| 1225 | { |
| 1226 | if (RECORD_IS_REPLAY) |
| 1227 | { |
| 1228 | if (!from_tty || query (_("Delete the log from this point forward " |
| 1229 | "and begin to record the running message " |
| 1230 | "at current PC?"))) |
| 1231 | record_list_release_next (); |
| 1232 | } |
| 1233 | else |
| 1234 | printf_unfiltered (_("Already at end of record list.\n")); |
| 1235 | |
| 1236 | } |
| 1237 | else |
| 1238 | printf_unfiltered (_("Process record is not started.\n")); |
| 1239 | } |
| 1240 | |
| 1241 | /* Implement the "stoprecord" command. */ |
| 1242 | |
| 1243 | static void |
| 1244 | cmd_record_stop (char *args, int from_tty) |
| 1245 | { |
| 1246 | if (current_target.to_stratum == record_stratum) |
| 1247 | { |
| 1248 | unpush_target (&record_ops); |
| 1249 | printf_unfiltered (_("Process record is stoped and all execution " |
| 1250 | "log is deleted.\n")); |
| 1251 | } |
| 1252 | else |
| 1253 | printf_unfiltered (_("Process record is not started.\n")); |
| 1254 | } |
| 1255 | |
| 1256 | /* Set upper limit of record log size. */ |
| 1257 | |
| 1258 | static void |
| 1259 | set_record_insn_max_num (char *args, int from_tty, struct cmd_list_element *c) |
| 1260 | { |
| 1261 | if (record_insn_num > record_insn_max_num && record_insn_max_num) |
| 1262 | { |
| 1263 | printf_unfiltered (_("Record instructions number is bigger than " |
| 1264 | "record instructions max number. Auto delete " |
| 1265 | "the first ones?\n")); |
| 1266 | |
| 1267 | while (record_insn_num > record_insn_max_num) |
| 1268 | record_list_release_first (); |
| 1269 | } |
| 1270 | } |
| 1271 | |
| 1272 | /* Print the current index into the record log (number of insns recorded |
| 1273 | so far). */ |
| 1274 | |
| 1275 | static void |
| 1276 | show_record_insn_number (char *ignore, int from_tty) |
| 1277 | { |
| 1278 | printf_unfiltered (_("Record instruction number is %d.\n"), |
| 1279 | record_insn_num); |
| 1280 | } |
| 1281 | |
| 1282 | static struct cmd_list_element *record_cmdlist, *set_record_cmdlist, |
| 1283 | *show_record_cmdlist, *info_record_cmdlist; |
| 1284 | |
| 1285 | static void |
| 1286 | set_record_command (char *args, int from_tty) |
| 1287 | { |
| 1288 | printf_unfiltered (_("\ |
| 1289 | \"set record\" must be followed by an apporpriate subcommand.\n")); |
| 1290 | help_list (set_record_cmdlist, "set record ", all_commands, gdb_stdout); |
| 1291 | } |
| 1292 | |
| 1293 | static void |
| 1294 | show_record_command (char *args, int from_tty) |
| 1295 | { |
| 1296 | cmd_show_list (show_record_cmdlist, from_tty, ""); |
| 1297 | } |
| 1298 | |
| 1299 | static void |
| 1300 | info_record_command (char *args, int from_tty) |
| 1301 | { |
| 1302 | cmd_show_list (info_record_cmdlist, from_tty, ""); |
| 1303 | } |
| 1304 | |
| 1305 | void |
| 1306 | _initialize_record (void) |
| 1307 | { |
| 1308 | /* Init record_first. */ |
| 1309 | record_first.prev = NULL; |
| 1310 | record_first.next = NULL; |
| 1311 | record_first.type = record_end; |
| 1312 | |
| 1313 | init_record_ops (); |
| 1314 | add_target (&record_ops); |
| 1315 | |
| 1316 | add_setshow_zinteger_cmd ("record", no_class, &record_debug, |
| 1317 | _("Set debugging of record/replay feature."), |
| 1318 | _("Show debugging of record/replay feature."), |
| 1319 | _("When enabled, debugging output for " |
| 1320 | "record/replay feature is displayed."), |
| 1321 | NULL, show_record_debug, &setdebuglist, |
| 1322 | &showdebuglist); |
| 1323 | |
| 1324 | add_prefix_cmd ("record", class_obscure, cmd_record_start, |
| 1325 | _("Abbreviated form of \"target record\" command."), |
| 1326 | &record_cmdlist, "record ", 0, &cmdlist); |
| 1327 | add_com_alias ("rec", "record", class_obscure, 1); |
| 1328 | add_prefix_cmd ("record", class_support, set_record_command, |
| 1329 | _("Set record options"), &set_record_cmdlist, |
| 1330 | "set record ", 0, &setlist); |
| 1331 | add_alias_cmd ("rec", "record", class_obscure, 1, &setlist); |
| 1332 | add_prefix_cmd ("record", class_support, show_record_command, |
| 1333 | _("Show record options"), &show_record_cmdlist, |
| 1334 | "show record ", 0, &showlist); |
| 1335 | add_alias_cmd ("rec", "record", class_obscure, 1, &showlist); |
| 1336 | add_prefix_cmd ("record", class_support, info_record_command, |
| 1337 | _("Info record options"), &info_record_cmdlist, |
| 1338 | "info record ", 0, &infolist); |
| 1339 | add_alias_cmd ("rec", "record", class_obscure, 1, &infolist); |
| 1340 | |
| 1341 | |
| 1342 | add_cmd ("delete", class_obscure, cmd_record_delete, |
| 1343 | _("Delete the rest of execution log and start recording it anew."), |
| 1344 | &record_cmdlist); |
| 1345 | add_alias_cmd ("d", "delete", class_obscure, 1, &record_cmdlist); |
| 1346 | add_alias_cmd ("del", "delete", class_obscure, 1, &record_cmdlist); |
| 1347 | |
| 1348 | add_cmd ("stop", class_obscure, cmd_record_stop, |
| 1349 | _("Stop the record/replay target."), |
| 1350 | &record_cmdlist); |
| 1351 | add_alias_cmd ("s", "stop", class_obscure, 1, &record_cmdlist); |
| 1352 | |
| 1353 | /* Record instructions number limit command. */ |
| 1354 | add_setshow_boolean_cmd ("stop-at-limit", no_class, |
| 1355 | &record_stop_at_limit, _("\ |
| 1356 | Set whether record/replay stops when record/replay buffer becomes full."), _("\ |
| 1357 | Show whether record/replay stops when record/replay buffer becomes full."), _("\ |
| 1358 | Default is ON.\n\ |
| 1359 | When ON, if the record/replay buffer becomes full, ask user what to do.\n\ |
| 1360 | When OFF, if the record/replay buffer becomes full,\n\ |
| 1361 | delete the oldest recorded instruction to make room for each new one."), |
| 1362 | NULL, NULL, |
| 1363 | &set_record_cmdlist, &show_record_cmdlist); |
| 1364 | add_setshow_zinteger_cmd ("insn-number-max", no_class, |
| 1365 | &record_insn_max_num, |
| 1366 | _("Set record/replay buffer limit."), |
| 1367 | _("Show record/replay buffer limit."), _("\ |
| 1368 | Set the maximum number of instructions to be stored in the\n\ |
| 1369 | record/replay buffer. Zero means unlimited. Default is 200000."), |
| 1370 | set_record_insn_max_num, |
| 1371 | NULL, &set_record_cmdlist, &show_record_cmdlist); |
| 1372 | add_cmd ("insn-number", class_obscure, show_record_insn_number, |
| 1373 | _("Show the current number of instructions in the " |
| 1374 | "record/replay buffer."), &info_record_cmdlist); |
| 1375 | } |