1 /* Memory-access and commands for "inferior" process, for GDB. 2 3 Copyright (C) 1986-2015 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 "arch-utils.h" 22 #include <signal.h> 23 #include "symtab.h" 24 #include "gdbtypes.h" 25 #include "frame.h" 26 #include "inferior.h" 27 #include "infrun.h" 28 #include "environ.h" 29 #include "value.h" 30 #include "gdbcmd.h" 31 #include "symfile.h" 32 #include "gdbcore.h" 33 #include "target.h" 34 #include "language.h" 35 #include "objfiles.h" 36 #include "completer.h" 37 #include "ui-out.h" 38 #include "event-top.h" 39 #include "parser-defs.h" 40 #include "regcache.h" 41 #include "reggroups.h" 42 #include "block.h" 43 #include "solib.h" 44 #include <ctype.h> 45 #include "observer.h" 46 #include "target-descriptions.h" 47 #include "user-regs.h" 48 #include "cli/cli-decode.h" 49 #include "gdbthread.h" 50 #include "valprint.h" 51 #include "inline-frame.h" 52 #include "tracepoint.h" 53 #include "inf-loop.h" 54 #include "continuations.h" 55 #include "linespec.h" 56 #include "cli/cli-utils.h" 57 58 /* Local functions: */ 59 60 static void nofp_registers_info (char *, int); 61 62 static void print_return_value (struct value *function, 63 struct type *value_type); 64 65 static void until_next_command (int); 66 67 static void until_command (char *, int); 68 69 static void path_info (char *, int); 70 71 static void path_command (char *, int); 72 73 static void unset_command (char *, int); 74 75 static void float_info (char *, int); 76 77 static void disconnect_command (char *, int); 78 79 static void unset_environment_command (char *, int); 80 81 static void set_environment_command (char *, int); 82 83 static void environment_info (char *, int); 84 85 static void program_info (char *, int); 86 87 static void finish_command (char *, int); 88 89 static void signal_command (char *, int); 90 91 static void jump_command (char *, int); 92 93 static void step_1 (int, int, char *); 94 static void step_once (int skip_subroutines, int single_inst, 95 int count, int thread); 96 97 static void next_command (char *, int); 98 99 static void step_command (char *, int); 100 101 static void run_command (char *, int); 102 103 static void run_no_args_command (char *args, int from_tty); 104 105 static void go_command (char *line_no, int from_tty); 106 107 void _initialize_infcmd (void); 108 109 #define ERROR_NO_INFERIOR \ 110 if (!target_has_execution) error (_("The program is not being run.")); 111 112 /* Scratch area where string containing arguments to give to the 113 program will be stored by 'set args'. As soon as anything is 114 stored, notice_args_set will move it into per-inferior storage. 115 Arguments are separated by spaces. Empty string (pointer to '\0') 116 means no args. */ 117 118 static char *inferior_args_scratch; 119 120 /* Scratch area where 'set inferior-tty' will store user-provided value. 121 We'll immediate copy it into per-inferior storage. */ 122 123 static char *inferior_io_terminal_scratch; 124 125 /* Pid of our debugged inferior, or 0 if no inferior now. 126 Since various parts of infrun.c test this to see whether there is a program 127 being debugged it should be nonzero (currently 3 is used) for remote 128 debugging. */ 129 130 ptid_t inferior_ptid; 131 132 /* Address at which inferior stopped. */ 133 134 CORE_ADDR stop_pc; 135 136 /* Nonzero if stopped due to completion of a stack dummy routine. */ 137 138 enum stop_stack_kind stop_stack_dummy; 139 140 /* Nonzero if stopped due to a random (unexpected) signal in inferior 141 process. */ 142 143 int stopped_by_random_signal; 144 145 /* See inferior.h. */ 146 147 int startup_with_shell = 1; 148 149 150 /* Accessor routines. */ 151 152 /* Set the io terminal for the current inferior. Ownership of 153 TERMINAL_NAME is not transferred. */ 154 155 void 156 set_inferior_io_terminal (const char *terminal_name) 157 { 158 xfree (current_inferior ()->terminal); 159 current_inferior ()->terminal = terminal_name ? xstrdup (terminal_name) : 0; 160 } 161 162 const char * 163 get_inferior_io_terminal (void) 164 { 165 return current_inferior ()->terminal; 166 } 167 168 static void 169 set_inferior_tty_command (char *args, int from_tty, 170 struct cmd_list_element *c) 171 { 172 /* CLI has assigned the user-provided value to inferior_io_terminal_scratch. 173 Now route it to current inferior. */ 174 set_inferior_io_terminal (inferior_io_terminal_scratch); 175 } 176 177 static void 178 show_inferior_tty_command (struct ui_file *file, int from_tty, 179 struct cmd_list_element *c, const char *value) 180 { 181 /* Note that we ignore the passed-in value in favor of computing it 182 directly. */ 183 const char *inferior_io_terminal = get_inferior_io_terminal (); 184 185 if (inferior_io_terminal == NULL) 186 inferior_io_terminal = ""; 187 fprintf_filtered (gdb_stdout, 188 _("Terminal for future runs of program being debugged " 189 "is \"%s\".\n"), inferior_io_terminal); 190 } 191 192 char * 193 get_inferior_args (void) 194 { 195 if (current_inferior ()->argc != 0) 196 { 197 char *n; 198 199 n = construct_inferior_arguments (current_inferior ()->argc, 200 current_inferior ()->argv); 201 set_inferior_args (n); 202 xfree (n); 203 } 204 205 if (current_inferior ()->args == NULL) 206 current_inferior ()->args = xstrdup (""); 207 208 return current_inferior ()->args; 209 } 210 211 /* Set the arguments for the current inferior. Ownership of 212 NEWARGS is not transferred. */ 213 214 void 215 set_inferior_args (char *newargs) 216 { 217 xfree (current_inferior ()->args); 218 current_inferior ()->args = newargs ? xstrdup (newargs) : NULL; 219 current_inferior ()->argc = 0; 220 current_inferior ()->argv = 0; 221 } 222 223 void 224 set_inferior_args_vector (int argc, char **argv) 225 { 226 current_inferior ()->argc = argc; 227 current_inferior ()->argv = argv; 228 } 229 230 /* Notice when `set args' is run. */ 231 232 static void 233 set_args_command (char *args, int from_tty, struct cmd_list_element *c) 234 { 235 /* CLI has assigned the user-provided value to inferior_args_scratch. 236 Now route it to current inferior. */ 237 set_inferior_args (inferior_args_scratch); 238 } 239 240 /* Notice when `show args' is run. */ 241 242 static void 243 show_args_command (struct ui_file *file, int from_tty, 244 struct cmd_list_element *c, const char *value) 245 { 246 /* Note that we ignore the passed-in value in favor of computing it 247 directly. */ 248 deprecated_show_value_hack (file, from_tty, c, get_inferior_args ()); 249 } 250 251 252 /* Compute command-line string given argument vector. This does the 253 same shell processing as fork_inferior. */ 254 255 char * 256 construct_inferior_arguments (int argc, char **argv) 257 { 258 char *result; 259 260 if (startup_with_shell) 261 { 262 #ifdef __MINGW32__ 263 /* This holds all the characters considered special to the 264 Windows shells. */ 265 char *special = "\"!&*|[]{}<>?`~^=;, \t\n"; 266 const char quote = '"'; 267 #else 268 /* This holds all the characters considered special to the 269 typical Unix shells. We include `^' because the SunOS 270 /bin/sh treats it as a synonym for `|'. */ 271 char *special = "\"!#$&*()\\|[]{}<>?'`~^; \t\n"; 272 const char quote = '\''; 273 #endif 274 int i; 275 int length = 0; 276 char *out, *cp; 277 278 /* We over-compute the size. It shouldn't matter. */ 279 for (i = 0; i < argc; ++i) 280 length += 3 * strlen (argv[i]) + 1 + 2 * (argv[i][0] == '\0'); 281 282 result = (char *) xmalloc (length); 283 out = result; 284 285 for (i = 0; i < argc; ++i) 286 { 287 if (i > 0) 288 *out++ = ' '; 289 290 /* Need to handle empty arguments specially. */ 291 if (argv[i][0] == '\0') 292 { 293 *out++ = quote; 294 *out++ = quote; 295 } 296 else 297 { 298 #ifdef __MINGW32__ 299 int quoted = 0; 300 301 if (strpbrk (argv[i], special)) 302 { 303 quoted = 1; 304 *out++ = quote; 305 } 306 #endif 307 for (cp = argv[i]; *cp; ++cp) 308 { 309 if (*cp == '\n') 310 { 311 /* A newline cannot be quoted with a backslash (it 312 just disappears), only by putting it inside 313 quotes. */ 314 *out++ = quote; 315 *out++ = '\n'; 316 *out++ = quote; 317 } 318 else 319 { 320 #ifdef __MINGW32__ 321 if (*cp == quote) 322 #else 323 if (strchr (special, *cp) != NULL) 324 #endif 325 *out++ = '\\'; 326 *out++ = *cp; 327 } 328 } 329 #ifdef __MINGW32__ 330 if (quoted) 331 *out++ = quote; 332 #endif 333 } 334 } 335 *out = '\0'; 336 } 337 else 338 { 339 /* In this case we can't handle arguments that contain spaces, 340 tabs, or newlines -- see breakup_args(). */ 341 int i; 342 int length = 0; 343 344 for (i = 0; i < argc; ++i) 345 { 346 char *cp = strchr (argv[i], ' '); 347 if (cp == NULL) 348 cp = strchr (argv[i], '\t'); 349 if (cp == NULL) 350 cp = strchr (argv[i], '\n'); 351 if (cp != NULL) 352 error (_("can't handle command-line " 353 "argument containing whitespace")); 354 length += strlen (argv[i]) + 1; 355 } 356 357 result = (char *) xmalloc (length); 358 result[0] = '\0'; 359 for (i = 0; i < argc; ++i) 360 { 361 if (i > 0) 362 strcat (result, " "); 363 strcat (result, argv[i]); 364 } 365 } 366 367 return result; 368 } 369 370 371 /* This function strips the '&' character (indicating background 372 execution) that is added as *the last* of the arguments ARGS of a 373 command. A copy of the incoming ARGS without the '&' is returned, 374 unless the resulting string after stripping is empty, in which case 375 NULL is returned. *BG_CHAR_P is an output boolean that indicates 376 whether the '&' character was found. */ 377 378 static char * 379 strip_bg_char (const char *args, int *bg_char_p) 380 { 381 const char *p; 382 383 if (args == NULL || *args == '\0') 384 { 385 *bg_char_p = 0; 386 return NULL; 387 } 388 389 p = args + strlen (args); 390 if (p[-1] == '&') 391 { 392 p--; 393 while (p > args && isspace (p[-1])) 394 p--; 395 396 *bg_char_p = 1; 397 if (p != args) 398 return savestring (args, p - args); 399 else 400 return NULL; 401 } 402 403 *bg_char_p = 0; 404 return xstrdup (args); 405 } 406 407 /* Common actions to take after creating any sort of inferior, by any 408 means (running, attaching, connecting, et cetera). The target 409 should be stopped. */ 410 411 void 412 post_create_inferior (struct target_ops *target, int from_tty) 413 { 414 volatile struct gdb_exception ex; 415 416 /* Be sure we own the terminal in case write operations are performed. */ 417 target_terminal_ours (); 418 419 /* If the target hasn't taken care of this already, do it now. 420 Targets which need to access registers during to_open, 421 to_create_inferior, or to_attach should do it earlier; but many 422 don't need to. */ 423 target_find_description (); 424 425 /* Now that we know the register layout, retrieve current PC. But 426 if the PC is unavailable (e.g., we're opening a core file with 427 missing registers info), ignore it. */ 428 stop_pc = 0; 429 TRY_CATCH (ex, RETURN_MASK_ERROR) 430 { 431 stop_pc = regcache_read_pc (get_current_regcache ()); 432 } 433 if (ex.reason < 0 && ex.error != NOT_AVAILABLE_ERROR) 434 throw_exception (ex); 435 436 if (exec_bfd) 437 { 438 const unsigned solib_add_generation 439 = current_program_space->solib_add_generation; 440 441 /* Create the hooks to handle shared library load and unload 442 events. */ 443 solib_create_inferior_hook (from_tty); 444 445 if (current_program_space->solib_add_generation == solib_add_generation) 446 { 447 /* The platform-specific hook should load initial shared libraries, 448 but didn't. FROM_TTY will be incorrectly 0 but such solib 449 targets should be fixed anyway. Call it only after the solib 450 target has been initialized by solib_create_inferior_hook. */ 451 452 if (info_verbose) 453 warning (_("platform-specific solib_create_inferior_hook did " 454 "not load initial shared libraries.")); 455 456 /* If the solist is global across processes, there's no need to 457 refetch it here. */ 458 if (!gdbarch_has_global_solist (target_gdbarch ())) 459 solib_add (NULL, 0, target, auto_solib_add); 460 } 461 } 462 463 /* If the user sets watchpoints before execution having started, 464 then she gets software watchpoints, because GDB can't know which 465 target will end up being pushed, or if it supports hardware 466 watchpoints or not. breakpoint_re_set takes care of promoting 467 watchpoints to hardware watchpoints if possible, however, if this 468 new inferior doesn't load shared libraries or we don't pull in 469 symbols from any other source on this target/arch, 470 breakpoint_re_set is never called. Call it now so that software 471 watchpoints get a chance to be promoted to hardware watchpoints 472 if the now pushed target supports hardware watchpoints. */ 473 breakpoint_re_set (); 474 475 observer_notify_inferior_created (target, from_tty); 476 } 477 478 /* Kill the inferior if already running. This function is designed 479 to be called when we are about to start the execution of the program 480 from the beginning. Ask the user to confirm that he wants to restart 481 the program being debugged when FROM_TTY is non-null. */ 482 483 static void 484 kill_if_already_running (int from_tty) 485 { 486 if (! ptid_equal (inferior_ptid, null_ptid) && target_has_execution) 487 { 488 /* Bail out before killing the program if we will not be able to 489 restart it. */ 490 target_require_runnable (); 491 492 if (from_tty 493 && !query (_("The program being debugged has been started already.\n\ 494 Start it from the beginning? "))) 495 error (_("Program not restarted.")); 496 target_kill (); 497 } 498 } 499 500 /* See inferior.h. */ 501 502 void 503 prepare_execution_command (struct target_ops *target, int background) 504 { 505 /* If we get a request for running in the bg but the target 506 doesn't support it, error out. */ 507 if (background && !target->to_can_async_p (target)) 508 error (_("Asynchronous execution not supported on this target.")); 509 510 /* If we don't get a request of running in the bg, then we need 511 to simulate synchronous (fg) execution. */ 512 if (!background && target->to_can_async_p (target)) 513 { 514 /* Simulate synchronous execution. Note no cleanup is necessary 515 for this. stdin is re-enabled whenever an error reaches the 516 top level. */ 517 async_disable_stdin (); 518 } 519 } 520 521 /* Implement the "run" command. If TBREAK_AT_MAIN is set, then insert 522 a temporary breakpoint at the begining of the main program before 523 running the program. */ 524 525 static void 526 run_command_1 (char *args, int from_tty, int tbreak_at_main) 527 { 528 char *exec_file; 529 struct cleanup *old_chain; 530 ptid_t ptid; 531 struct ui_out *uiout = current_uiout; 532 struct target_ops *run_target; 533 int async_exec; 534 struct cleanup *args_chain; 535 536 dont_repeat (); 537 538 kill_if_already_running (from_tty); 539 540 init_wait_for_inferior (); 541 clear_breakpoint_hit_counts (); 542 543 /* Clean up any leftovers from other runs. Some other things from 544 this function should probably be moved into target_pre_inferior. */ 545 target_pre_inferior (from_tty); 546 547 /* The comment here used to read, "The exec file is re-read every 548 time we do a generic_mourn_inferior, so we just have to worry 549 about the symbol file." The `generic_mourn_inferior' function 550 gets called whenever the program exits. However, suppose the 551 program exits, and *then* the executable file changes? We need 552 to check again here. Since reopen_exec_file doesn't do anything 553 if the timestamp hasn't changed, I don't see the harm. */ 554 reopen_exec_file (); 555 reread_symbols (); 556 557 args = strip_bg_char (args, &async_exec); 558 args_chain = make_cleanup (xfree, args); 559 560 /* Do validation and preparation before possibly changing anything 561 in the inferior. */ 562 563 run_target = find_run_target (); 564 565 prepare_execution_command (run_target, async_exec); 566 567 if (non_stop && !run_target->to_supports_non_stop (run_target)) 568 error (_("The target does not support running in non-stop mode.")); 569 570 /* Done. Can now set breakpoints, change inferior args, etc. */ 571 572 /* Insert the temporary breakpoint if a location was specified. */ 573 if (tbreak_at_main) 574 tbreak_command (main_name (), 0); 575 576 exec_file = (char *) get_exec_file (0); 577 578 /* We keep symbols from add-symbol-file, on the grounds that the 579 user might want to add some symbols before running the program 580 (right?). But sometimes (dynamic loading where the user manually 581 introduces the new symbols with add-symbol-file), the code which 582 the symbols describe does not persist between runs. Currently 583 the user has to manually nuke all symbols between runs if they 584 want them to go away (PR 2207). This is probably reasonable. */ 585 586 /* If there were other args, beside '&', process them. */ 587 if (args != NULL) 588 set_inferior_args (args); 589 590 if (from_tty) 591 { 592 ui_out_field_string (uiout, NULL, "Starting program"); 593 ui_out_text (uiout, ": "); 594 if (exec_file) 595 ui_out_field_string (uiout, "execfile", exec_file); 596 ui_out_spaces (uiout, 1); 597 /* We call get_inferior_args() because we might need to compute 598 the value now. */ 599 ui_out_field_string (uiout, "infargs", get_inferior_args ()); 600 ui_out_text (uiout, "\n"); 601 ui_out_flush (uiout); 602 } 603 604 /* Done with ARGS. */ 605 do_cleanups (args_chain); 606 607 /* We call get_inferior_args() because we might need to compute 608 the value now. */ 609 run_target->to_create_inferior (run_target, exec_file, get_inferior_args (), 610 environ_vector (current_inferior ()->environment), 611 from_tty); 612 /* to_create_inferior should push the target, so after this point we 613 shouldn't refer to run_target again. */ 614 run_target = NULL; 615 616 /* We're starting off a new process. When we get out of here, in 617 non-stop mode, finish the state of all threads of that process, 618 but leave other threads alone, as they may be stopped in internal 619 events --- the frontend shouldn't see them as stopped. In 620 all-stop, always finish the state of all threads, as we may be 621 resuming more than just the new process. */ 622 if (non_stop) 623 ptid = pid_to_ptid (ptid_get_pid (inferior_ptid)); 624 else 625 ptid = minus_one_ptid; 626 old_chain = make_cleanup (finish_thread_state_cleanup, &ptid); 627 628 /* Pass zero for FROM_TTY, because at this point the "run" command 629 has done its thing; now we are setting up the running program. */ 630 post_create_inferior (¤t_target, 0); 631 632 /* Start the target running. Do not use -1 continuation as it would skip 633 breakpoint right at the entry point. */ 634 proceed (regcache_read_pc (get_current_regcache ()), GDB_SIGNAL_0, 0); 635 636 /* Since there was no error, there's no need to finish the thread 637 states here. */ 638 discard_cleanups (old_chain); 639 } 640 641 static void 642 run_command (char *args, int from_tty) 643 { 644 run_command_1 (args, from_tty, 0); 645 } 646 647 static void 648 run_no_args_command (char *args, int from_tty) 649 { 650 set_inferior_args (""); 651 } 652 653 654 /* Start the execution of the program up until the beginning of the main 655 program. */ 656 657 static void 658 start_command (char *args, int from_tty) 659 { 660 /* Some languages such as Ada need to search inside the program 661 minimal symbols for the location where to put the temporary 662 breakpoint before starting. */ 663 if (!have_minimal_symbols ()) 664 error (_("No symbol table loaded. Use the \"file\" command.")); 665 666 /* Run the program until reaching the main procedure... */ 667 run_command_1 (args, from_tty, 1); 668 } 669 670 static int 671 proceed_thread_callback (struct thread_info *thread, void *arg) 672 { 673 /* We go through all threads individually instead of compressing 674 into a single target `resume_all' request, because some threads 675 may be stopped in internal breakpoints/events, or stopped waiting 676 for its turn in the displaced stepping queue (that is, they are 677 running && !executing). The target side has no idea about why 678 the thread is stopped, so a `resume_all' command would resume too 679 much. If/when GDB gains a way to tell the target `hold this 680 thread stopped until I say otherwise', then we can optimize 681 this. */ 682 if (!is_stopped (thread->ptid)) 683 return 0; 684 685 switch_to_thread (thread->ptid); 686 clear_proceed_status (0); 687 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT, 0); 688 return 0; 689 } 690 691 static void 692 ensure_valid_thread (void) 693 { 694 if (ptid_equal (inferior_ptid, null_ptid) 695 || is_exited (inferior_ptid)) 696 error (_("Cannot execute this command without a live selected thread.")); 697 } 698 699 /* If the user is looking at trace frames, any resumption of execution 700 is likely to mix up recorded and live target data. So simply 701 disallow those commands. */ 702 703 static void 704 ensure_not_tfind_mode (void) 705 { 706 if (get_traceframe_number () >= 0) 707 error (_("Cannot execute this command while looking at trace frames.")); 708 } 709 710 /* Throw an error indicating the current thread is running. */ 711 712 static void 713 error_is_running (void) 714 { 715 error (_("Cannot execute this command while " 716 "the selected thread is running.")); 717 } 718 719 /* Calls error_is_running if the current thread is running. */ 720 721 static void 722 ensure_not_running (void) 723 { 724 if (is_running (inferior_ptid)) 725 error_is_running (); 726 } 727 728 void 729 continue_1 (int all_threads) 730 { 731 ERROR_NO_INFERIOR; 732 ensure_not_tfind_mode (); 733 734 if (non_stop && all_threads) 735 { 736 /* Don't error out if the current thread is running, because 737 there may be other stopped threads. */ 738 struct cleanup *old_chain; 739 740 /* Backup current thread and selected frame. */ 741 old_chain = make_cleanup_restore_current_thread (); 742 743 iterate_over_threads (proceed_thread_callback, NULL); 744 745 if (sync_execution) 746 { 747 /* If all threads in the target were already running, 748 proceed_thread_callback ends up never calling proceed, 749 and so nothing calls this to put the inferior's terminal 750 settings in effect and remove stdin from the event loop, 751 which we must when running a foreground command. E.g.: 752 753 (gdb) c -a& 754 Continuing. 755 <all threads are running now> 756 (gdb) c -a 757 Continuing. 758 <no thread was resumed, but the inferior now owns the terminal> 759 */ 760 target_terminal_inferior (); 761 } 762 763 /* Restore selected ptid. */ 764 do_cleanups (old_chain); 765 } 766 else 767 { 768 ensure_valid_thread (); 769 ensure_not_running (); 770 clear_proceed_status (0); 771 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT, 0); 772 } 773 } 774 775 /* continue [-a] [proceed-count] [&] */ 776 777 static void 778 continue_command (char *args, int from_tty) 779 { 780 int async_exec; 781 int all_threads = 0; 782 struct cleanup *args_chain; 783 784 ERROR_NO_INFERIOR; 785 786 /* Find out whether we must run in the background. */ 787 args = strip_bg_char (args, &async_exec); 788 args_chain = make_cleanup (xfree, args); 789 790 prepare_execution_command (¤t_target, async_exec); 791 792 if (args != NULL) 793 { 794 if (strncmp (args, "-a", sizeof ("-a") - 1) == 0) 795 { 796 all_threads = 1; 797 args += sizeof ("-a") - 1; 798 if (*args == '\0') 799 args = NULL; 800 } 801 } 802 803 if (!non_stop && all_threads) 804 error (_("`-a' is meaningless in all-stop mode.")); 805 806 if (args != NULL && all_threads) 807 error (_("Can't resume all threads and specify " 808 "proceed count simultaneously.")); 809 810 /* If we have an argument left, set proceed count of breakpoint we 811 stopped at. */ 812 if (args != NULL) 813 { 814 bpstat bs = NULL; 815 int num, stat; 816 int stopped = 0; 817 struct thread_info *tp; 818 819 if (non_stop) 820 tp = find_thread_ptid (inferior_ptid); 821 else 822 { 823 ptid_t last_ptid; 824 struct target_waitstatus ws; 825 826 get_last_target_status (&last_ptid, &ws); 827 tp = find_thread_ptid (last_ptid); 828 } 829 if (tp != NULL) 830 bs = tp->control.stop_bpstat; 831 832 while ((stat = bpstat_num (&bs, &num)) != 0) 833 if (stat > 0) 834 { 835 set_ignore_count (num, 836 parse_and_eval_long (args) - 1, 837 from_tty); 838 /* set_ignore_count prints a message ending with a period. 839 So print two spaces before "Continuing.". */ 840 if (from_tty) 841 printf_filtered (" "); 842 stopped = 1; 843 } 844 845 if (!stopped && from_tty) 846 { 847 printf_filtered 848 ("Not stopped at any breakpoint; argument ignored.\n"); 849 } 850 } 851 852 /* Done with ARGS. */ 853 do_cleanups (args_chain); 854 855 if (from_tty) 856 printf_filtered (_("Continuing.\n")); 857 858 continue_1 (all_threads); 859 } 860 861 /* Record the starting point of a "step" or "next" command. */ 862 863 static void 864 set_step_frame (void) 865 { 866 struct symtab_and_line sal; 867 868 find_frame_sal (get_current_frame (), &sal); 869 set_step_info (get_current_frame (), sal); 870 } 871 872 /* Step until outside of current statement. */ 873 874 static void 875 step_command (char *count_string, int from_tty) 876 { 877 step_1 (0, 0, count_string); 878 } 879 880 /* Likewise, but skip over subroutine calls as if single instructions. */ 881 882 static void 883 next_command (char *count_string, int from_tty) 884 { 885 step_1 (1, 0, count_string); 886 } 887 888 /* Likewise, but step only one instruction. */ 889 890 static void 891 stepi_command (char *count_string, int from_tty) 892 { 893 step_1 (0, 1, count_string); 894 } 895 896 static void 897 nexti_command (char *count_string, int from_tty) 898 { 899 step_1 (1, 1, count_string); 900 } 901 902 void 903 delete_longjmp_breakpoint_cleanup (void *arg) 904 { 905 int thread = * (int *) arg; 906 delete_longjmp_breakpoint (thread); 907 } 908 909 static void 910 step_1 (int skip_subroutines, int single_inst, char *count_string) 911 { 912 int count = 1; 913 struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); 914 int async_exec; 915 int thread = -1; 916 struct cleanup *args_chain; 917 918 ERROR_NO_INFERIOR; 919 ensure_not_tfind_mode (); 920 ensure_valid_thread (); 921 ensure_not_running (); 922 923 count_string = strip_bg_char (count_string, &async_exec); 924 args_chain = make_cleanup (xfree, count_string); 925 926 prepare_execution_command (¤t_target, async_exec); 927 928 count = count_string ? parse_and_eval_long (count_string) : 1; 929 930 /* Done with ARGS. */ 931 do_cleanups (args_chain); 932 933 if (!single_inst || skip_subroutines) /* Leave si command alone. */ 934 { 935 struct thread_info *tp = inferior_thread (); 936 937 if (in_thread_list (inferior_ptid)) 938 thread = pid_to_thread_id (inferior_ptid); 939 940 set_longjmp_breakpoint (tp, get_frame_id (get_current_frame ())); 941 942 make_cleanup (delete_longjmp_breakpoint_cleanup, &thread); 943 } 944 945 /* In synchronous case, all is well; each step_once call will step once. */ 946 if (!target_can_async_p ()) 947 { 948 for (; count > 0; count--) 949 { 950 step_once (skip_subroutines, single_inst, count, thread); 951 952 if (!target_has_execution) 953 break; 954 else 955 { 956 struct thread_info *tp = inferior_thread (); 957 958 if (!tp->control.stop_step || !tp->step_multi) 959 { 960 /* If we stopped for some reason that is not stepping 961 there are no further steps to make. */ 962 tp->step_multi = 0; 963 break; 964 } 965 } 966 } 967 968 do_cleanups (cleanups); 969 } 970 else 971 { 972 /* In the case of an asynchronous target things get complicated; 973 do only one step for now, before returning control to the 974 event loop. Let the continuation figure out how many other 975 steps we need to do, and handle them one at the time, through 976 step_once. */ 977 step_once (skip_subroutines, single_inst, count, thread); 978 979 /* We are running, and the continuation is installed. It will 980 disable the longjmp breakpoint as appropriate. */ 981 discard_cleanups (cleanups); 982 } 983 } 984 985 struct step_1_continuation_args 986 { 987 int count; 988 int skip_subroutines; 989 int single_inst; 990 int thread; 991 }; 992 993 /* Called after we are done with one step operation, to check whether 994 we need to step again, before we print the prompt and return control 995 to the user. If count is > 1, we will need to do one more call to 996 proceed(), via step_once(). Basically it is like step_once and 997 step_1_continuation are co-recursive. */ 998 999 static void 1000 step_1_continuation (void *args, int err) 1001 { 1002 struct step_1_continuation_args *a = args; 1003 1004 if (target_has_execution) 1005 { 1006 struct thread_info *tp; 1007 1008 tp = inferior_thread (); 1009 if (!err 1010 && tp->step_multi && tp->control.stop_step) 1011 { 1012 /* There are more steps to make, and we did stop due to 1013 ending a stepping range. Do another step. */ 1014 step_once (a->skip_subroutines, a->single_inst, 1015 a->count - 1, a->thread); 1016 return; 1017 } 1018 tp->step_multi = 0; 1019 } 1020 1021 /* We either hit an error, or stopped for some reason that is 1022 not stepping, or there are no further steps to make. 1023 Cleanup. */ 1024 if (!a->single_inst || a->skip_subroutines) 1025 delete_longjmp_breakpoint (a->thread); 1026 } 1027 1028 /* Do just one step operation. This is useful to implement the 'step 1029 n' kind of commands. In case of asynchronous targets, we will have 1030 to set up a continuation to be done after the target stops (after 1031 this one step). For synch targets, the caller handles further 1032 stepping. */ 1033 1034 static void 1035 step_once (int skip_subroutines, int single_inst, int count, int thread) 1036 { 1037 struct frame_info *frame = get_current_frame (); 1038 1039 if (count > 0) 1040 { 1041 /* Don't assume THREAD is a valid thread id. It is set to -1 if 1042 the longjmp breakpoint was not required. Use the 1043 INFERIOR_PTID thread instead, which is the same thread when 1044 THREAD is set. */ 1045 struct thread_info *tp = inferior_thread (); 1046 1047 clear_proceed_status (!skip_subroutines); 1048 set_step_frame (); 1049 1050 if (!single_inst) 1051 { 1052 CORE_ADDR pc; 1053 1054 /* Step at an inlined function behaves like "down". */ 1055 if (!skip_subroutines 1056 && inline_skipped_frames (inferior_ptid)) 1057 { 1058 ptid_t resume_ptid; 1059 1060 /* Pretend that we've ran. */ 1061 resume_ptid = user_visible_resume_ptid (1); 1062 set_running (resume_ptid, 1); 1063 1064 step_into_inline_frame (inferior_ptid); 1065 if (count > 1) 1066 step_once (skip_subroutines, single_inst, count - 1, thread); 1067 else 1068 { 1069 /* Pretend that we've stopped. */ 1070 normal_stop (); 1071 1072 if (target_can_async_p ()) 1073 inferior_event_handler (INF_EXEC_COMPLETE, NULL); 1074 } 1075 return; 1076 } 1077 1078 pc = get_frame_pc (frame); 1079 find_pc_line_pc_range (pc, 1080 &tp->control.step_range_start, 1081 &tp->control.step_range_end); 1082 1083 tp->control.may_range_step = 1; 1084 1085 /* If we have no line info, switch to stepi mode. */ 1086 if (tp->control.step_range_end == 0 && step_stop_if_no_debug) 1087 { 1088 tp->control.step_range_start = tp->control.step_range_end = 1; 1089 tp->control.may_range_step = 0; 1090 } 1091 else if (tp->control.step_range_end == 0) 1092 { 1093 const char *name; 1094 1095 if (find_pc_partial_function (pc, &name, 1096 &tp->control.step_range_start, 1097 &tp->control.step_range_end) == 0) 1098 error (_("Cannot find bounds of current function")); 1099 1100 target_terminal_ours (); 1101 printf_filtered (_("Single stepping until exit from function %s," 1102 "\nwhich has no line number information.\n"), 1103 name); 1104 } 1105 } 1106 else 1107 { 1108 /* Say we are stepping, but stop after one insn whatever it does. */ 1109 tp->control.step_range_start = tp->control.step_range_end = 1; 1110 if (!skip_subroutines) 1111 /* It is stepi. 1112 Don't step over function calls, not even to functions lacking 1113 line numbers. */ 1114 tp->control.step_over_calls = STEP_OVER_NONE; 1115 } 1116 1117 if (skip_subroutines) 1118 tp->control.step_over_calls = STEP_OVER_ALL; 1119 1120 tp->step_multi = (count > 1); 1121 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT, 1); 1122 1123 /* For async targets, register a continuation to do any 1124 additional steps. For sync targets, the caller will handle 1125 further stepping. */ 1126 if (target_can_async_p ()) 1127 { 1128 struct step_1_continuation_args *args; 1129 1130 args = xmalloc (sizeof (*args)); 1131 args->skip_subroutines = skip_subroutines; 1132 args->single_inst = single_inst; 1133 args->count = count; 1134 args->thread = thread; 1135 1136 add_intermediate_continuation (tp, step_1_continuation, args, xfree); 1137 } 1138 } 1139 } 1140 1141 1142 /* Continue program at specified address. */ 1143 1144 static void 1145 jump_command (char *arg, int from_tty) 1146 { 1147 struct gdbarch *gdbarch = get_current_arch (); 1148 CORE_ADDR addr; 1149 struct symtabs_and_lines sals; 1150 struct symtab_and_line sal; 1151 struct symbol *fn; 1152 struct symbol *sfn; 1153 int async_exec; 1154 struct cleanup *args_chain; 1155 1156 ERROR_NO_INFERIOR; 1157 ensure_not_tfind_mode (); 1158 ensure_valid_thread (); 1159 ensure_not_running (); 1160 1161 /* Find out whether we must run in the background. */ 1162 arg = strip_bg_char (arg, &async_exec); 1163 args_chain = make_cleanup (xfree, arg); 1164 1165 prepare_execution_command (¤t_target, async_exec); 1166 1167 if (!arg) 1168 error_no_arg (_("starting address")); 1169 1170 sals = decode_line_with_last_displayed (arg, DECODE_LINE_FUNFIRSTLINE); 1171 if (sals.nelts != 1) 1172 { 1173 error (_("Unreasonable jump request")); 1174 } 1175 1176 sal = sals.sals[0]; 1177 xfree (sals.sals); 1178 1179 /* Done with ARGS. */ 1180 do_cleanups (args_chain); 1181 1182 if (sal.symtab == 0 && sal.pc == 0) 1183 error (_("No source file has been specified.")); 1184 1185 resolve_sal_pc (&sal); /* May error out. */ 1186 1187 /* See if we are trying to jump to another function. */ 1188 fn = get_frame_function (get_current_frame ()); 1189 sfn = find_pc_function (sal.pc); 1190 if (fn != NULL && sfn != fn) 1191 { 1192 if (!query (_("Line %d is not in `%s'. Jump anyway? "), sal.line, 1193 SYMBOL_PRINT_NAME (fn))) 1194 { 1195 error (_("Not confirmed.")); 1196 /* NOTREACHED */ 1197 } 1198 } 1199 1200 if (sfn != NULL) 1201 { 1202 struct obj_section *section; 1203 1204 fixup_symbol_section (sfn, 0); 1205 section = SYMBOL_OBJ_SECTION (symbol_objfile (sfn), sfn); 1206 if (section_is_overlay (section) 1207 && !section_is_mapped (section)) 1208 { 1209 if (!query (_("WARNING!!! Destination is in " 1210 "unmapped overlay! Jump anyway? "))) 1211 { 1212 error (_("Not confirmed.")); 1213 /* NOTREACHED */ 1214 } 1215 } 1216 } 1217 1218 addr = sal.pc; 1219 1220 if (from_tty) 1221 { 1222 printf_filtered (_("Continuing at ")); 1223 fputs_filtered (paddress (gdbarch, addr), gdb_stdout); 1224 printf_filtered (".\n"); 1225 } 1226 1227 clear_proceed_status (0); 1228 proceed (addr, GDB_SIGNAL_0, 0); 1229 } 1230 1231 1232 /* Go to line or address in current procedure. */ 1233 1234 static void 1235 go_command (char *line_no, int from_tty) 1236 { 1237 if (line_no == (char *) NULL || !*line_no) 1238 printf_filtered (_("Usage: go <location>\n")); 1239 else 1240 { 1241 tbreak_command (line_no, from_tty); 1242 jump_command (line_no, from_tty); 1243 } 1244 } 1245 1246 1247 /* Continue program giving it specified signal. */ 1248 1249 static void 1250 signal_command (char *signum_exp, int from_tty) 1251 { 1252 enum gdb_signal oursig; 1253 int async_exec; 1254 struct cleanup *args_chain; 1255 1256 dont_repeat (); /* Too dangerous. */ 1257 ERROR_NO_INFERIOR; 1258 ensure_not_tfind_mode (); 1259 ensure_valid_thread (); 1260 ensure_not_running (); 1261 1262 /* Find out whether we must run in the background. */ 1263 signum_exp = strip_bg_char (signum_exp, &async_exec); 1264 args_chain = make_cleanup (xfree, signum_exp); 1265 1266 prepare_execution_command (¤t_target, async_exec); 1267 1268 if (!signum_exp) 1269 error_no_arg (_("signal number")); 1270 1271 /* It would be even slicker to make signal names be valid expressions, 1272 (the type could be "enum $signal" or some such), then the user could 1273 assign them to convenience variables. */ 1274 oursig = gdb_signal_from_name (signum_exp); 1275 1276 if (oursig == GDB_SIGNAL_UNKNOWN) 1277 { 1278 /* No, try numeric. */ 1279 int num = parse_and_eval_long (signum_exp); 1280 1281 if (num == 0) 1282 oursig = GDB_SIGNAL_0; 1283 else 1284 oursig = gdb_signal_from_command (num); 1285 } 1286 1287 /* Look for threads other than the current that this command ends up 1288 resuming too (due to schedlock off), and warn if they'll get a 1289 signal delivered. "signal 0" is used to suppress a previous 1290 signal, but if the current thread is no longer the one that got 1291 the signal, then the user is potentially suppressing the signal 1292 of the wrong thread. */ 1293 if (!non_stop) 1294 { 1295 struct thread_info *tp; 1296 ptid_t resume_ptid; 1297 int must_confirm = 0; 1298 1299 /* This indicates what will be resumed. Either a single thread, 1300 a whole process, or all threads of all processes. */ 1301 resume_ptid = user_visible_resume_ptid (0); 1302 1303 ALL_NON_EXITED_THREADS (tp) 1304 { 1305 if (ptid_equal (tp->ptid, inferior_ptid)) 1306 continue; 1307 if (!ptid_match (tp->ptid, resume_ptid)) 1308 continue; 1309 1310 if (tp->suspend.stop_signal != GDB_SIGNAL_0 1311 && signal_pass_state (tp->suspend.stop_signal)) 1312 { 1313 if (!must_confirm) 1314 printf_unfiltered (_("Note:\n")); 1315 printf_unfiltered (_(" Thread %d previously stopped with signal %s, %s.\n"), 1316 tp->num, 1317 gdb_signal_to_name (tp->suspend.stop_signal), 1318 gdb_signal_to_string (tp->suspend.stop_signal)); 1319 must_confirm = 1; 1320 } 1321 } 1322 1323 if (must_confirm 1324 && !query (_("Continuing thread %d (the current thread) with specified signal will\n" 1325 "still deliver the signals noted above to their respective threads.\n" 1326 "Continue anyway? "), 1327 inferior_thread ()->num)) 1328 error (_("Not confirmed.")); 1329 } 1330 1331 if (from_tty) 1332 { 1333 if (oursig == GDB_SIGNAL_0) 1334 printf_filtered (_("Continuing with no signal.\n")); 1335 else 1336 printf_filtered (_("Continuing with signal %s.\n"), 1337 gdb_signal_to_name (oursig)); 1338 } 1339 1340 clear_proceed_status (0); 1341 proceed ((CORE_ADDR) -1, oursig, 0); 1342 } 1343 1344 /* Queue a signal to be delivered to the current thread. */ 1345 1346 static void 1347 queue_signal_command (char *signum_exp, int from_tty) 1348 { 1349 enum gdb_signal oursig; 1350 struct thread_info *tp; 1351 1352 ERROR_NO_INFERIOR; 1353 ensure_not_tfind_mode (); 1354 ensure_valid_thread (); 1355 ensure_not_running (); 1356 1357 if (signum_exp == NULL) 1358 error_no_arg (_("signal number")); 1359 1360 /* It would be even slicker to make signal names be valid expressions, 1361 (the type could be "enum $signal" or some such), then the user could 1362 assign them to convenience variables. */ 1363 oursig = gdb_signal_from_name (signum_exp); 1364 1365 if (oursig == GDB_SIGNAL_UNKNOWN) 1366 { 1367 /* No, try numeric. */ 1368 int num = parse_and_eval_long (signum_exp); 1369 1370 if (num == 0) 1371 oursig = GDB_SIGNAL_0; 1372 else 1373 oursig = gdb_signal_from_command (num); 1374 } 1375 1376 if (oursig != GDB_SIGNAL_0 1377 && !signal_pass_state (oursig)) 1378 error (_("Signal handling set to not pass this signal to the program.")); 1379 1380 tp = inferior_thread (); 1381 tp->suspend.stop_signal = oursig; 1382 } 1383 1384 /* Continuation args to be passed to the "until" command 1385 continuation. */ 1386 struct until_next_continuation_args 1387 { 1388 /* The thread that was current when the command was executed. */ 1389 int thread; 1390 }; 1391 1392 /* A continuation callback for until_next_command. */ 1393 1394 static void 1395 until_next_continuation (void *arg, int err) 1396 { 1397 struct until_next_continuation_args *a = arg; 1398 1399 delete_longjmp_breakpoint (a->thread); 1400 } 1401 1402 /* Proceed until we reach a different source line with pc greater than 1403 our current one or exit the function. We skip calls in both cases. 1404 1405 Note that eventually this command should probably be changed so 1406 that only source lines are printed out when we hit the breakpoint 1407 we set. This may involve changes to wait_for_inferior and the 1408 proceed status code. */ 1409 1410 static void 1411 until_next_command (int from_tty) 1412 { 1413 struct frame_info *frame; 1414 CORE_ADDR pc; 1415 struct symbol *func; 1416 struct symtab_and_line sal; 1417 struct thread_info *tp = inferior_thread (); 1418 int thread = tp->num; 1419 struct cleanup *old_chain; 1420 1421 clear_proceed_status (0); 1422 set_step_frame (); 1423 1424 frame = get_current_frame (); 1425 1426 /* Step until either exited from this function or greater 1427 than the current line (if in symbolic section) or pc (if 1428 not). */ 1429 1430 pc = get_frame_pc (frame); 1431 func = find_pc_function (pc); 1432 1433 if (!func) 1434 { 1435 struct bound_minimal_symbol msymbol = lookup_minimal_symbol_by_pc (pc); 1436 1437 if (msymbol.minsym == NULL) 1438 error (_("Execution is not within a known function.")); 1439 1440 tp->control.step_range_start = BMSYMBOL_VALUE_ADDRESS (msymbol); 1441 /* The upper-bound of step_range is exclusive. In order to make PC 1442 within the range, set the step_range_end with PC + 1. */ 1443 tp->control.step_range_end = pc + 1; 1444 } 1445 else 1446 { 1447 sal = find_pc_line (pc, 0); 1448 1449 tp->control.step_range_start = BLOCK_START (SYMBOL_BLOCK_VALUE (func)); 1450 tp->control.step_range_end = sal.end; 1451 } 1452 tp->control.may_range_step = 1; 1453 1454 tp->control.step_over_calls = STEP_OVER_ALL; 1455 1456 tp->step_multi = 0; /* Only one call to proceed */ 1457 1458 set_longjmp_breakpoint (tp, get_frame_id (frame)); 1459 old_chain = make_cleanup (delete_longjmp_breakpoint_cleanup, &thread); 1460 1461 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT, 1); 1462 1463 if (target_can_async_p () && is_running (inferior_ptid)) 1464 { 1465 struct until_next_continuation_args *cont_args; 1466 1467 discard_cleanups (old_chain); 1468 cont_args = XNEW (struct until_next_continuation_args); 1469 cont_args->thread = inferior_thread ()->num; 1470 1471 add_continuation (tp, until_next_continuation, cont_args, xfree); 1472 } 1473 else 1474 do_cleanups (old_chain); 1475 } 1476 1477 static void 1478 until_command (char *arg, int from_tty) 1479 { 1480 int async_exec; 1481 struct cleanup *args_chain; 1482 1483 ERROR_NO_INFERIOR; 1484 ensure_not_tfind_mode (); 1485 ensure_valid_thread (); 1486 ensure_not_running (); 1487 1488 /* Find out whether we must run in the background. */ 1489 arg = strip_bg_char (arg, &async_exec); 1490 args_chain = make_cleanup (xfree, arg); 1491 1492 prepare_execution_command (¤t_target, async_exec); 1493 1494 if (arg) 1495 until_break_command (arg, from_tty, 0); 1496 else 1497 until_next_command (from_tty); 1498 1499 /* Done with ARGS. */ 1500 do_cleanups (args_chain); 1501 } 1502 1503 static void 1504 advance_command (char *arg, int from_tty) 1505 { 1506 int async_exec; 1507 struct cleanup *args_chain; 1508 1509 ERROR_NO_INFERIOR; 1510 ensure_not_tfind_mode (); 1511 ensure_valid_thread (); 1512 ensure_not_running (); 1513 1514 if (arg == NULL) 1515 error_no_arg (_("a location")); 1516 1517 /* Find out whether we must run in the background. */ 1518 arg = strip_bg_char (arg, &async_exec); 1519 args_chain = make_cleanup (xfree, arg); 1520 1521 prepare_execution_command (¤t_target, async_exec); 1522 1523 until_break_command (arg, from_tty, 1); 1524 1525 /* Done with ARGS. */ 1526 do_cleanups (args_chain); 1527 } 1528 1529 /* Return the value of the result of a function at the end of a 'finish' 1530 command/BP. */ 1531 1532 struct value * 1533 get_return_value (struct value *function, struct type *value_type) 1534 { 1535 struct regcache *stop_regs = stop_registers; 1536 struct gdbarch *gdbarch; 1537 struct value *value; 1538 struct cleanup *cleanup = make_cleanup (null_cleanup, NULL); 1539 1540 /* If stop_registers were not saved, use the current registers. */ 1541 if (!stop_regs) 1542 { 1543 stop_regs = regcache_dup (get_current_regcache ()); 1544 make_cleanup_regcache_xfree (stop_regs); 1545 } 1546 1547 gdbarch = get_regcache_arch (stop_regs); 1548 1549 CHECK_TYPEDEF (value_type); 1550 gdb_assert (TYPE_CODE (value_type) != TYPE_CODE_VOID); 1551 1552 /* FIXME: 2003-09-27: When returning from a nested inferior function 1553 call, it's possible (with no help from the architecture vector) 1554 to locate and return/print a "struct return" value. This is just 1555 a more complicated case of what is already being done in the 1556 inferior function call code. In fact, when inferior function 1557 calls are made async, this will likely be made the norm. */ 1558 1559 switch (gdbarch_return_value (gdbarch, function, value_type, 1560 NULL, NULL, NULL)) 1561 { 1562 case RETURN_VALUE_REGISTER_CONVENTION: 1563 case RETURN_VALUE_ABI_RETURNS_ADDRESS: 1564 case RETURN_VALUE_ABI_PRESERVES_ADDRESS: 1565 value = allocate_value (value_type); 1566 gdbarch_return_value (gdbarch, function, value_type, stop_regs, 1567 value_contents_raw (value), NULL); 1568 break; 1569 case RETURN_VALUE_STRUCT_CONVENTION: 1570 value = NULL; 1571 break; 1572 default: 1573 internal_error (__FILE__, __LINE__, _("bad switch")); 1574 } 1575 1576 do_cleanups (cleanup); 1577 1578 return value; 1579 } 1580 1581 /* Print the result of a function at the end of a 'finish' command. */ 1582 1583 static void 1584 print_return_value (struct value *function, struct type *value_type) 1585 { 1586 struct value *value = get_return_value (function, value_type); 1587 struct ui_out *uiout = current_uiout; 1588 1589 if (value) 1590 { 1591 struct value_print_options opts; 1592 struct ui_file *stb; 1593 struct cleanup *old_chain; 1594 1595 /* Print it. */ 1596 stb = mem_fileopen (); 1597 old_chain = make_cleanup_ui_file_delete (stb); 1598 ui_out_text (uiout, "Value returned is "); 1599 ui_out_field_fmt (uiout, "gdb-result-var", "$%d", 1600 record_latest_value (value)); 1601 ui_out_text (uiout, " = "); 1602 get_no_prettyformat_print_options (&opts); 1603 value_print (value, stb, &opts); 1604 ui_out_field_stream (uiout, "return-value", stb); 1605 ui_out_text (uiout, "\n"); 1606 do_cleanups (old_chain); 1607 } 1608 else 1609 { 1610 ui_out_text (uiout, "Value returned has type: "); 1611 ui_out_field_string (uiout, "return-type", TYPE_NAME (value_type)); 1612 ui_out_text (uiout, "."); 1613 ui_out_text (uiout, " Cannot determine contents\n"); 1614 } 1615 } 1616 1617 /* Stuff that needs to be done by the finish command after the target 1618 has stopped. In asynchronous mode, we wait for the target to stop 1619 in the call to poll or select in the event loop, so it is 1620 impossible to do all the stuff as part of the finish_command 1621 function itself. The only chance we have to complete this command 1622 is in fetch_inferior_event, which is called by the event loop as 1623 soon as it detects that the target has stopped. */ 1624 1625 struct finish_command_continuation_args 1626 { 1627 /* The thread that as current when the command was executed. */ 1628 int thread; 1629 struct breakpoint *breakpoint; 1630 struct symbol *function; 1631 }; 1632 1633 static void 1634 finish_command_continuation (void *arg, int err) 1635 { 1636 struct finish_command_continuation_args *a = arg; 1637 1638 if (!err) 1639 { 1640 struct thread_info *tp = NULL; 1641 bpstat bs = NULL; 1642 1643 if (!ptid_equal (inferior_ptid, null_ptid) 1644 && target_has_execution 1645 && is_stopped (inferior_ptid)) 1646 { 1647 tp = inferior_thread (); 1648 bs = tp->control.stop_bpstat; 1649 } 1650 1651 if (bpstat_find_breakpoint (bs, a->breakpoint) != NULL 1652 && a->function != NULL) 1653 { 1654 struct type *value_type; 1655 1656 value_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (a->function)); 1657 if (!value_type) 1658 internal_error (__FILE__, __LINE__, 1659 _("finish_command: function has no target type")); 1660 1661 if (TYPE_CODE (value_type) != TYPE_CODE_VOID) 1662 { 1663 volatile struct gdb_exception ex; 1664 struct value *func; 1665 1666 func = read_var_value (a->function, get_current_frame ()); 1667 TRY_CATCH (ex, RETURN_MASK_ALL) 1668 { 1669 /* print_return_value can throw an exception in some 1670 circumstances. We need to catch this so that we still 1671 delete the breakpoint. */ 1672 print_return_value (func, value_type); 1673 } 1674 if (ex.reason < 0) 1675 exception_print (gdb_stdout, ex); 1676 } 1677 } 1678 1679 /* We suppress normal call of normal_stop observer and do it 1680 here so that the *stopped notification includes the return 1681 value. */ 1682 if (bs != NULL && tp->control.proceed_to_finish) 1683 observer_notify_normal_stop (bs, 1 /* print frame */); 1684 } 1685 1686 delete_breakpoint (a->breakpoint); 1687 delete_longjmp_breakpoint (a->thread); 1688 } 1689 1690 static void 1691 finish_command_continuation_free_arg (void *arg) 1692 { 1693 xfree (arg); 1694 } 1695 1696 /* finish_backward -- helper function for finish_command. */ 1697 1698 static void 1699 finish_backward (struct symbol *function) 1700 { 1701 struct symtab_and_line sal; 1702 struct thread_info *tp = inferior_thread (); 1703 CORE_ADDR pc; 1704 CORE_ADDR func_addr; 1705 1706 pc = get_frame_pc (get_current_frame ()); 1707 1708 if (find_pc_partial_function (pc, NULL, &func_addr, NULL) == 0) 1709 error (_("Cannot find bounds of current function")); 1710 1711 sal = find_pc_line (func_addr, 0); 1712 1713 tp->control.proceed_to_finish = 1; 1714 /* Special case: if we're sitting at the function entry point, 1715 then all we need to do is take a reverse singlestep. We 1716 don't need to set a breakpoint, and indeed it would do us 1717 no good to do so. 1718 1719 Note that this can only happen at frame #0, since there's 1720 no way that a function up the stack can have a return address 1721 that's equal to its entry point. */ 1722 1723 if (sal.pc != pc) 1724 { 1725 struct frame_info *frame = get_selected_frame (NULL); 1726 struct gdbarch *gdbarch = get_frame_arch (frame); 1727 struct symtab_and_line sr_sal; 1728 1729 /* Set a step-resume at the function's entry point. Once that's 1730 hit, we'll do one more step backwards. */ 1731 init_sal (&sr_sal); 1732 sr_sal.pc = sal.pc; 1733 sr_sal.pspace = get_frame_program_space (frame); 1734 insert_step_resume_breakpoint_at_sal (gdbarch, 1735 sr_sal, null_frame_id); 1736 1737 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT, 0); 1738 } 1739 else 1740 { 1741 /* We're almost there -- we just need to back up by one more 1742 single-step. */ 1743 tp->control.step_range_start = tp->control.step_range_end = 1; 1744 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT, 1); 1745 } 1746 } 1747 1748 /* finish_forward -- helper function for finish_command. */ 1749 1750 static void 1751 finish_forward (struct symbol *function, struct frame_info *frame) 1752 { 1753 struct frame_id frame_id = get_frame_id (frame); 1754 struct gdbarch *gdbarch = get_frame_arch (frame); 1755 struct symtab_and_line sal; 1756 struct thread_info *tp = inferior_thread (); 1757 struct breakpoint *breakpoint; 1758 struct cleanup *old_chain; 1759 struct finish_command_continuation_args *cargs; 1760 int thread = tp->num; 1761 1762 sal = find_pc_line (get_frame_pc (frame), 0); 1763 sal.pc = get_frame_pc (frame); 1764 1765 breakpoint = set_momentary_breakpoint (gdbarch, sal, 1766 get_stack_frame_id (frame), 1767 bp_finish); 1768 1769 /* set_momentary_breakpoint invalidates FRAME. */ 1770 frame = NULL; 1771 1772 old_chain = make_cleanup_delete_breakpoint (breakpoint); 1773 1774 set_longjmp_breakpoint (tp, frame_id); 1775 make_cleanup (delete_longjmp_breakpoint_cleanup, &thread); 1776 1777 /* We want stop_registers, please... */ 1778 tp->control.proceed_to_finish = 1; 1779 cargs = xmalloc (sizeof (*cargs)); 1780 1781 cargs->thread = thread; 1782 cargs->breakpoint = breakpoint; 1783 cargs->function = function; 1784 add_continuation (tp, finish_command_continuation, cargs, 1785 finish_command_continuation_free_arg); 1786 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT, 0); 1787 1788 discard_cleanups (old_chain); 1789 if (!target_can_async_p ()) 1790 do_all_continuations (0); 1791 } 1792 1793 /* "finish": Set a temporary breakpoint at the place the selected 1794 frame will return to, then continue. */ 1795 1796 static void 1797 finish_command (char *arg, int from_tty) 1798 { 1799 struct frame_info *frame; 1800 struct symbol *function; 1801 int async_exec; 1802 struct cleanup *args_chain; 1803 1804 ERROR_NO_INFERIOR; 1805 ensure_not_tfind_mode (); 1806 ensure_valid_thread (); 1807 ensure_not_running (); 1808 1809 /* Find out whether we must run in the background. */ 1810 arg = strip_bg_char (arg, &async_exec); 1811 args_chain = make_cleanup (xfree, arg); 1812 1813 prepare_execution_command (¤t_target, async_exec); 1814 1815 if (arg) 1816 error (_("The \"finish\" command does not take any arguments.")); 1817 1818 /* Done with ARGS. */ 1819 do_cleanups (args_chain); 1820 1821 frame = get_prev_frame (get_selected_frame (_("No selected frame."))); 1822 if (frame == 0) 1823 error (_("\"finish\" not meaningful in the outermost frame.")); 1824 1825 clear_proceed_status (0); 1826 1827 /* Finishing from an inline frame is completely different. We don't 1828 try to show the "return value" - no way to locate it. So we do 1829 not need a completion. */ 1830 if (get_frame_type (get_selected_frame (_("No selected frame."))) 1831 == INLINE_FRAME) 1832 { 1833 /* Claim we are stepping in the calling frame. An empty step 1834 range means that we will stop once we aren't in a function 1835 called by that frame. We don't use the magic "1" value for 1836 step_range_end, because then infrun will think this is nexti, 1837 and not step over the rest of this inlined function call. */ 1838 struct thread_info *tp = inferior_thread (); 1839 struct symtab_and_line empty_sal; 1840 1841 init_sal (&empty_sal); 1842 set_step_info (frame, empty_sal); 1843 tp->control.step_range_start = get_frame_pc (frame); 1844 tp->control.step_range_end = tp->control.step_range_start; 1845 tp->control.step_over_calls = STEP_OVER_ALL; 1846 1847 /* Print info on the selected frame, including level number but not 1848 source. */ 1849 if (from_tty) 1850 { 1851 printf_filtered (_("Run till exit from ")); 1852 print_stack_frame (get_selected_frame (NULL), 1, LOCATION, 0); 1853 } 1854 1855 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT, 1); 1856 return; 1857 } 1858 1859 /* Ignore TAILCALL_FRAME type frames, they were executed already before 1860 entering THISFRAME. */ 1861 while (get_frame_type (frame) == TAILCALL_FRAME) 1862 frame = get_prev_frame (frame); 1863 1864 /* Find the function we will return from. */ 1865 1866 function = find_pc_function (get_frame_pc (get_selected_frame (NULL))); 1867 1868 /* Print info on the selected frame, including level number but not 1869 source. */ 1870 if (from_tty) 1871 { 1872 if (execution_direction == EXEC_REVERSE) 1873 printf_filtered (_("Run back to call of ")); 1874 else 1875 printf_filtered (_("Run till exit from ")); 1876 1877 print_stack_frame (get_selected_frame (NULL), 1, LOCATION, 0); 1878 } 1879 1880 if (execution_direction == EXEC_REVERSE) 1881 finish_backward (function); 1882 else 1883 finish_forward (function, frame); 1884 } 1885 1886 1887 static void 1888 program_info (char *args, int from_tty) 1889 { 1890 bpstat bs; 1891 int num, stat; 1892 struct thread_info *tp; 1893 ptid_t ptid; 1894 1895 if (!target_has_execution) 1896 { 1897 printf_filtered (_("The program being debugged is not being run.\n")); 1898 return; 1899 } 1900 1901 if (non_stop) 1902 ptid = inferior_ptid; 1903 else 1904 { 1905 struct target_waitstatus ws; 1906 1907 get_last_target_status (&ptid, &ws); 1908 } 1909 1910 if (ptid_equal (ptid, null_ptid) || is_exited (ptid)) 1911 error (_("Invalid selected thread.")); 1912 else if (is_running (ptid)) 1913 error (_("Selected thread is running.")); 1914 1915 tp = find_thread_ptid (ptid); 1916 bs = tp->control.stop_bpstat; 1917 stat = bpstat_num (&bs, &num); 1918 1919 target_files_info (); 1920 printf_filtered (_("Program stopped at %s.\n"), 1921 paddress (target_gdbarch (), stop_pc)); 1922 if (tp->control.stop_step) 1923 printf_filtered (_("It stopped after being stepped.\n")); 1924 else if (stat != 0) 1925 { 1926 /* There may be several breakpoints in the same place, so this 1927 isn't as strange as it seems. */ 1928 while (stat != 0) 1929 { 1930 if (stat < 0) 1931 { 1932 printf_filtered (_("It stopped at a breakpoint " 1933 "that has since been deleted.\n")); 1934 } 1935 else 1936 printf_filtered (_("It stopped at breakpoint %d.\n"), num); 1937 stat = bpstat_num (&bs, &num); 1938 } 1939 } 1940 else if (tp->suspend.stop_signal != GDB_SIGNAL_0) 1941 { 1942 printf_filtered (_("It stopped with signal %s, %s.\n"), 1943 gdb_signal_to_name (tp->suspend.stop_signal), 1944 gdb_signal_to_string (tp->suspend.stop_signal)); 1945 } 1946 1947 if (from_tty) 1948 { 1949 printf_filtered (_("Type \"info stack\" or \"info " 1950 "registers\" for more information.\n")); 1951 } 1952 } 1953 1954 static void 1955 environment_info (char *var, int from_tty) 1956 { 1957 if (var) 1958 { 1959 char *val = get_in_environ (current_inferior ()->environment, var); 1960 1961 if (val) 1962 { 1963 puts_filtered (var); 1964 puts_filtered (" = "); 1965 puts_filtered (val); 1966 puts_filtered ("\n"); 1967 } 1968 else 1969 { 1970 puts_filtered ("Environment variable \""); 1971 puts_filtered (var); 1972 puts_filtered ("\" not defined.\n"); 1973 } 1974 } 1975 else 1976 { 1977 char **vector = environ_vector (current_inferior ()->environment); 1978 1979 while (*vector) 1980 { 1981 puts_filtered (*vector++); 1982 puts_filtered ("\n"); 1983 } 1984 } 1985 } 1986 1987 static void 1988 set_environment_command (char *arg, int from_tty) 1989 { 1990 char *p, *val, *var; 1991 int nullset = 0; 1992 1993 if (arg == 0) 1994 error_no_arg (_("environment variable and value")); 1995 1996 /* Find seperation between variable name and value. */ 1997 p = (char *) strchr (arg, '='); 1998 val = (char *) strchr (arg, ' '); 1999 2000 if (p != 0 && val != 0) 2001 { 2002 /* We have both a space and an equals. If the space is before the 2003 equals, walk forward over the spaces til we see a nonspace 2004 (possibly the equals). */ 2005 if (p > val) 2006 while (*val == ' ') 2007 val++; 2008 2009 /* Now if the = is after the char following the spaces, 2010 take the char following the spaces. */ 2011 if (p > val) 2012 p = val - 1; 2013 } 2014 else if (val != 0 && p == 0) 2015 p = val; 2016 2017 if (p == arg) 2018 error_no_arg (_("environment variable to set")); 2019 2020 if (p == 0 || p[1] == 0) 2021 { 2022 nullset = 1; 2023 if (p == 0) 2024 p = arg + strlen (arg); /* So that savestring below will work. */ 2025 } 2026 else 2027 { 2028 /* Not setting variable value to null. */ 2029 val = p + 1; 2030 while (*val == ' ' || *val == '\t') 2031 val++; 2032 } 2033 2034 while (p != arg && (p[-1] == ' ' || p[-1] == '\t')) 2035 p--; 2036 2037 var = savestring (arg, p - arg); 2038 if (nullset) 2039 { 2040 printf_filtered (_("Setting environment variable " 2041 "\"%s\" to null value.\n"), 2042 var); 2043 set_in_environ (current_inferior ()->environment, var, ""); 2044 } 2045 else 2046 set_in_environ (current_inferior ()->environment, var, val); 2047 xfree (var); 2048 } 2049 2050 static void 2051 unset_environment_command (char *var, int from_tty) 2052 { 2053 if (var == 0) 2054 { 2055 /* If there is no argument, delete all environment variables. 2056 Ask for confirmation if reading from the terminal. */ 2057 if (!from_tty || query (_("Delete all environment variables? "))) 2058 { 2059 free_environ (current_inferior ()->environment); 2060 current_inferior ()->environment = make_environ (); 2061 } 2062 } 2063 else 2064 unset_in_environ (current_inferior ()->environment, var); 2065 } 2066 2067 /* Handle the execution path (PATH variable). */ 2068 2069 static const char path_var_name[] = "PATH"; 2070 2071 static void 2072 path_info (char *args, int from_tty) 2073 { 2074 puts_filtered ("Executable and object file path: "); 2075 puts_filtered (get_in_environ (current_inferior ()->environment, 2076 path_var_name)); 2077 puts_filtered ("\n"); 2078 } 2079 2080 /* Add zero or more directories to the front of the execution path. */ 2081 2082 static void 2083 path_command (char *dirname, int from_tty) 2084 { 2085 char *exec_path; 2086 char *env; 2087 2088 dont_repeat (); 2089 env = get_in_environ (current_inferior ()->environment, path_var_name); 2090 /* Can be null if path is not set. */ 2091 if (!env) 2092 env = ""; 2093 exec_path = xstrdup (env); 2094 mod_path (dirname, &exec_path); 2095 set_in_environ (current_inferior ()->environment, path_var_name, exec_path); 2096 xfree (exec_path); 2097 if (from_tty) 2098 path_info ((char *) NULL, from_tty); 2099 } 2100 2101 2102 /* Print out the register NAME with value VAL, to FILE, in the default 2103 fashion. */ 2104 2105 static void 2106 default_print_one_register_info (struct ui_file *file, 2107 const char *name, 2108 struct value *val) 2109 { 2110 struct type *regtype = value_type (val); 2111 int print_raw_format; 2112 2113 fputs_filtered (name, file); 2114 print_spaces_filtered (15 - strlen (name), file); 2115 2116 print_raw_format = (value_entirely_available (val) 2117 && !value_optimized_out (val)); 2118 2119 /* If virtual format is floating, print it that way, and in raw 2120 hex. */ 2121 if (TYPE_CODE (regtype) == TYPE_CODE_FLT 2122 || TYPE_CODE (regtype) == TYPE_CODE_DECFLOAT) 2123 { 2124 int j; 2125 struct value_print_options opts; 2126 const gdb_byte *valaddr = value_contents_for_printing (val); 2127 enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (regtype)); 2128 2129 get_user_print_options (&opts); 2130 opts.deref_ref = 1; 2131 2132 val_print (regtype, 2133 value_contents_for_printing (val), 2134 value_embedded_offset (val), 0, 2135 file, 0, val, &opts, current_language); 2136 2137 if (print_raw_format) 2138 { 2139 fprintf_filtered (file, "\t(raw "); 2140 print_hex_chars (file, valaddr, TYPE_LENGTH (regtype), byte_order); 2141 fprintf_filtered (file, ")"); 2142 } 2143 } 2144 else 2145 { 2146 struct value_print_options opts; 2147 2148 /* Print the register in hex. */ 2149 get_formatted_print_options (&opts, 'x'); 2150 opts.deref_ref = 1; 2151 val_print (regtype, 2152 value_contents_for_printing (val), 2153 value_embedded_offset (val), 0, 2154 file, 0, val, &opts, current_language); 2155 /* If not a vector register, print it also according to its 2156 natural format. */ 2157 if (print_raw_format && TYPE_VECTOR (regtype) == 0) 2158 { 2159 get_user_print_options (&opts); 2160 opts.deref_ref = 1; 2161 fprintf_filtered (file, "\t"); 2162 val_print (regtype, 2163 value_contents_for_printing (val), 2164 value_embedded_offset (val), 0, 2165 file, 0, val, &opts, current_language); 2166 } 2167 } 2168 2169 fprintf_filtered (file, "\n"); 2170 } 2171 2172 /* Print out the machine register regnum. If regnum is -1, print all 2173 registers (print_all == 1) or all non-float and non-vector 2174 registers (print_all == 0). 2175 2176 For most machines, having all_registers_info() print the 2177 register(s) one per line is good enough. If a different format is 2178 required, (eg, for MIPS or Pyramid 90x, which both have lots of 2179 regs), or there is an existing convention for showing all the 2180 registers, define the architecture method PRINT_REGISTERS_INFO to 2181 provide that format. */ 2182 2183 void 2184 default_print_registers_info (struct gdbarch *gdbarch, 2185 struct ui_file *file, 2186 struct frame_info *frame, 2187 int regnum, int print_all) 2188 { 2189 int i; 2190 const int numregs = gdbarch_num_regs (gdbarch) 2191 + gdbarch_num_pseudo_regs (gdbarch); 2192 2193 for (i = 0; i < numregs; i++) 2194 { 2195 /* Decide between printing all regs, non-float / vector regs, or 2196 specific reg. */ 2197 if (regnum == -1) 2198 { 2199 if (print_all) 2200 { 2201 if (!gdbarch_register_reggroup_p (gdbarch, i, all_reggroup)) 2202 continue; 2203 } 2204 else 2205 { 2206 if (!gdbarch_register_reggroup_p (gdbarch, i, general_reggroup)) 2207 continue; 2208 } 2209 } 2210 else 2211 { 2212 if (i != regnum) 2213 continue; 2214 } 2215 2216 /* If the register name is empty, it is undefined for this 2217 processor, so don't display anything. */ 2218 if (gdbarch_register_name (gdbarch, i) == NULL 2219 || *(gdbarch_register_name (gdbarch, i)) == '\0') 2220 continue; 2221 2222 default_print_one_register_info (file, 2223 gdbarch_register_name (gdbarch, i), 2224 value_of_register (i, frame)); 2225 } 2226 } 2227 2228 void 2229 registers_info (char *addr_exp, int fpregs) 2230 { 2231 struct frame_info *frame; 2232 struct gdbarch *gdbarch; 2233 2234 if (!target_has_registers) 2235 error (_("The program has no registers now.")); 2236 frame = get_selected_frame (NULL); 2237 gdbarch = get_frame_arch (frame); 2238 2239 if (!addr_exp) 2240 { 2241 gdbarch_print_registers_info (gdbarch, gdb_stdout, 2242 frame, -1, fpregs); 2243 return; 2244 } 2245 2246 while (*addr_exp != '\0') 2247 { 2248 char *start; 2249 const char *end; 2250 2251 /* Skip leading white space. */ 2252 addr_exp = skip_spaces (addr_exp); 2253 2254 /* Discard any leading ``$''. Check that there is something 2255 resembling a register following it. */ 2256 if (addr_exp[0] == '$') 2257 addr_exp++; 2258 if (isspace ((*addr_exp)) || (*addr_exp) == '\0') 2259 error (_("Missing register name")); 2260 2261 /* Find the start/end of this register name/num/group. */ 2262 start = addr_exp; 2263 while ((*addr_exp) != '\0' && !isspace ((*addr_exp))) 2264 addr_exp++; 2265 end = addr_exp; 2266 2267 /* Figure out what we've found and display it. */ 2268 2269 /* A register name? */ 2270 { 2271 int regnum = user_reg_map_name_to_regnum (gdbarch, start, end - start); 2272 2273 if (regnum >= 0) 2274 { 2275 /* User registers lie completely outside of the range of 2276 normal registers. Catch them early so that the target 2277 never sees them. */ 2278 if (regnum >= gdbarch_num_regs (gdbarch) 2279 + gdbarch_num_pseudo_regs (gdbarch)) 2280 { 2281 struct value *regval = value_of_user_reg (regnum, frame); 2282 const char *regname = user_reg_map_regnum_to_name (gdbarch, 2283 regnum); 2284 2285 /* Print in the same fashion 2286 gdbarch_print_registers_info's default 2287 implementation prints. */ 2288 default_print_one_register_info (gdb_stdout, 2289 regname, 2290 regval); 2291 } 2292 else 2293 gdbarch_print_registers_info (gdbarch, gdb_stdout, 2294 frame, regnum, fpregs); 2295 continue; 2296 } 2297 } 2298 2299 /* A register group? */ 2300 { 2301 struct reggroup *group; 2302 2303 for (group = reggroup_next (gdbarch, NULL); 2304 group != NULL; 2305 group = reggroup_next (gdbarch, group)) 2306 { 2307 /* Don't bother with a length check. Should the user 2308 enter a short register group name, go with the first 2309 group that matches. */ 2310 if (strncmp (start, reggroup_name (group), end - start) == 0) 2311 break; 2312 } 2313 if (group != NULL) 2314 { 2315 int regnum; 2316 2317 for (regnum = 0; 2318 regnum < gdbarch_num_regs (gdbarch) 2319 + gdbarch_num_pseudo_regs (gdbarch); 2320 regnum++) 2321 { 2322 if (gdbarch_register_reggroup_p (gdbarch, regnum, group)) 2323 gdbarch_print_registers_info (gdbarch, 2324 gdb_stdout, frame, 2325 regnum, fpregs); 2326 } 2327 continue; 2328 } 2329 } 2330 2331 /* Nothing matched. */ 2332 error (_("Invalid register `%.*s'"), (int) (end - start), start); 2333 } 2334 } 2335 2336 static void 2337 all_registers_info (char *addr_exp, int from_tty) 2338 { 2339 registers_info (addr_exp, 1); 2340 } 2341 2342 static void 2343 nofp_registers_info (char *addr_exp, int from_tty) 2344 { 2345 registers_info (addr_exp, 0); 2346 } 2347 2348 static void 2349 print_vector_info (struct ui_file *file, 2350 struct frame_info *frame, const char *args) 2351 { 2352 struct gdbarch *gdbarch = get_frame_arch (frame); 2353 2354 if (gdbarch_print_vector_info_p (gdbarch)) 2355 gdbarch_print_vector_info (gdbarch, file, frame, args); 2356 else 2357 { 2358 int regnum; 2359 int printed_something = 0; 2360 2361 for (regnum = 0; 2362 regnum < gdbarch_num_regs (gdbarch) 2363 + gdbarch_num_pseudo_regs (gdbarch); 2364 regnum++) 2365 { 2366 if (gdbarch_register_reggroup_p (gdbarch, regnum, vector_reggroup)) 2367 { 2368 printed_something = 1; 2369 gdbarch_print_registers_info (gdbarch, file, frame, regnum, 1); 2370 } 2371 } 2372 if (!printed_something) 2373 fprintf_filtered (file, "No vector information\n"); 2374 } 2375 } 2376 2377 static void 2378 vector_info (char *args, int from_tty) 2379 { 2380 if (!target_has_registers) 2381 error (_("The program has no registers now.")); 2382 2383 print_vector_info (gdb_stdout, get_selected_frame (NULL), args); 2384 } 2385 2386 /* Kill the inferior process. Make us have no inferior. */ 2387 2388 static void 2389 kill_command (char *arg, int from_tty) 2390 { 2391 /* FIXME: This should not really be inferior_ptid (or target_has_execution). 2392 It should be a distinct flag that indicates that a target is active, cuz 2393 some targets don't have processes! */ 2394 2395 if (ptid_equal (inferior_ptid, null_ptid)) 2396 error (_("The program is not being run.")); 2397 if (!query (_("Kill the program being debugged? "))) 2398 error (_("Not confirmed.")); 2399 target_kill (); 2400 2401 /* If we still have other inferiors to debug, then don't mess with 2402 with their threads. */ 2403 if (!have_inferiors ()) 2404 { 2405 init_thread_list (); /* Destroy thread info. */ 2406 2407 /* Killing off the inferior can leave us with a core file. If 2408 so, print the state we are left in. */ 2409 if (target_has_stack) 2410 { 2411 printf_filtered (_("In %s,\n"), target_longname); 2412 print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); 2413 } 2414 } 2415 bfd_cache_close_all (); 2416 } 2417 2418 /* Used in `attach&' command. ARG is a point to an integer 2419 representing a process id. Proceed threads of this process iff 2420 they stopped due to debugger request, and when they did, they 2421 reported a clean stop (GDB_SIGNAL_0). Do not proceed threads 2422 that have been explicitly been told to stop. */ 2423 2424 static int 2425 proceed_after_attach_callback (struct thread_info *thread, 2426 void *arg) 2427 { 2428 int pid = * (int *) arg; 2429 2430 if (ptid_get_pid (thread->ptid) == pid 2431 && !is_exited (thread->ptid) 2432 && !is_executing (thread->ptid) 2433 && !thread->stop_requested 2434 && thread->suspend.stop_signal == GDB_SIGNAL_0) 2435 { 2436 switch_to_thread (thread->ptid); 2437 clear_proceed_status (0); 2438 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT, 0); 2439 } 2440 2441 return 0; 2442 } 2443 2444 static void 2445 proceed_after_attach (int pid) 2446 { 2447 /* Don't error out if the current thread is running, because 2448 there may be other stopped threads. */ 2449 struct cleanup *old_chain; 2450 2451 /* Backup current thread and selected frame. */ 2452 old_chain = make_cleanup_restore_current_thread (); 2453 2454 iterate_over_threads (proceed_after_attach_callback, &pid); 2455 2456 /* Restore selected ptid. */ 2457 do_cleanups (old_chain); 2458 } 2459 2460 /* attach_command -- 2461 takes a program started up outside of gdb and ``attaches'' to it. 2462 This stops it cold in its tracks and allows us to start debugging it. 2463 and wait for the trace-trap that results from attaching. */ 2464 2465 static void 2466 attach_command_post_wait (char *args, int from_tty, int async_exec) 2467 { 2468 char *exec_file; 2469 char *full_exec_path = NULL; 2470 struct inferior *inferior; 2471 2472 inferior = current_inferior (); 2473 inferior->control.stop_soon = NO_STOP_QUIETLY; 2474 2475 /* If no exec file is yet known, try to determine it from the 2476 process itself. */ 2477 exec_file = (char *) get_exec_file (0); 2478 if (!exec_file) 2479 { 2480 exec_file = target_pid_to_exec_file (ptid_get_pid (inferior_ptid)); 2481 if (exec_file) 2482 { 2483 /* It's possible we don't have a full path, but rather just a 2484 filename. Some targets, such as HP-UX, don't provide the 2485 full path, sigh. 2486 2487 Attempt to qualify the filename against the source path. 2488 (If that fails, we'll just fall back on the original 2489 filename. Not much more we can do...) */ 2490 2491 if (!source_full_path_of (exec_file, &full_exec_path)) 2492 full_exec_path = xstrdup (exec_file); 2493 2494 exec_file_attach (full_exec_path, from_tty); 2495 symbol_file_add_main (full_exec_path, from_tty); 2496 } 2497 } 2498 else 2499 { 2500 reopen_exec_file (); 2501 reread_symbols (); 2502 } 2503 2504 /* Take any necessary post-attaching actions for this platform. */ 2505 target_post_attach (ptid_get_pid (inferior_ptid)); 2506 2507 post_create_inferior (¤t_target, from_tty); 2508 2509 if (async_exec) 2510 { 2511 /* The user requested an `attach&', so be sure to leave threads 2512 that didn't get a signal running. */ 2513 2514 /* Immediatelly resume all suspended threads of this inferior, 2515 and this inferior only. This should have no effect on 2516 already running threads. If a thread has been stopped with a 2517 signal, leave it be. */ 2518 if (non_stop) 2519 proceed_after_attach (inferior->pid); 2520 else 2521 { 2522 if (inferior_thread ()->suspend.stop_signal == GDB_SIGNAL_0) 2523 { 2524 clear_proceed_status (0); 2525 proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT, 0); 2526 } 2527 } 2528 } 2529 else 2530 { 2531 /* The user requested a plain `attach', so be sure to leave 2532 the inferior stopped. */ 2533 2534 if (target_can_async_p ()) 2535 async_enable_stdin (); 2536 2537 /* At least the current thread is already stopped. */ 2538 2539 /* In all-stop, by definition, all threads have to be already 2540 stopped at this point. In non-stop, however, although the 2541 selected thread is stopped, others may still be executing. 2542 Be sure to explicitly stop all threads of the process. This 2543 should have no effect on already stopped threads. */ 2544 if (non_stop) 2545 target_stop (pid_to_ptid (inferior->pid)); 2546 2547 /* Tell the user/frontend where we're stopped. */ 2548 normal_stop (); 2549 if (deprecated_attach_hook) 2550 deprecated_attach_hook (); 2551 } 2552 } 2553 2554 struct attach_command_continuation_args 2555 { 2556 char *args; 2557 int from_tty; 2558 int async_exec; 2559 }; 2560 2561 static void 2562 attach_command_continuation (void *args, int err) 2563 { 2564 struct attach_command_continuation_args *a = args; 2565 2566 if (err) 2567 return; 2568 2569 attach_command_post_wait (a->args, a->from_tty, a->async_exec); 2570 } 2571 2572 static void 2573 attach_command_continuation_free_args (void *args) 2574 { 2575 struct attach_command_continuation_args *a = args; 2576 2577 xfree (a->args); 2578 xfree (a); 2579 } 2580 2581 void 2582 attach_command (char *args, int from_tty) 2583 { 2584 int async_exec; 2585 struct cleanup *args_chain; 2586 struct target_ops *attach_target; 2587 2588 dont_repeat (); /* Not for the faint of heart */ 2589 2590 if (gdbarch_has_global_solist (target_gdbarch ())) 2591 /* Don't complain if all processes share the same symbol 2592 space. */ 2593 ; 2594 else if (target_has_execution) 2595 { 2596 if (query (_("A program is being debugged already. Kill it? "))) 2597 target_kill (); 2598 else 2599 error (_("Not killed.")); 2600 } 2601 2602 /* Clean up any leftovers from other runs. Some other things from 2603 this function should probably be moved into target_pre_inferior. */ 2604 target_pre_inferior (from_tty); 2605 2606 args = strip_bg_char (args, &async_exec); 2607 args_chain = make_cleanup (xfree, args); 2608 2609 attach_target = find_attach_target (); 2610 2611 prepare_execution_command (attach_target, async_exec); 2612 2613 if (non_stop && !attach_target->to_supports_non_stop (attach_target)) 2614 error (_("Cannot attach to this target in non-stop mode")); 2615 2616 attach_target->to_attach (attach_target, args, from_tty); 2617 /* to_attach should push the target, so after this point we 2618 shouldn't refer to attach_target again. */ 2619 attach_target = NULL; 2620 2621 /* Done with ARGS. */ 2622 do_cleanups (args_chain); 2623 2624 /* Set up the "saved terminal modes" of the inferior 2625 based on what modes we are starting it with. */ 2626 target_terminal_init (); 2627 2628 /* Install inferior's terminal modes. This may look like a no-op, 2629 as we've just saved them above, however, this does more than 2630 restore terminal settings: 2631 2632 - installs a SIGINT handler that forwards SIGINT to the inferior. 2633 Otherwise a Ctrl-C pressed just while waiting for the initial 2634 stop would end up as a spurious Quit. 2635 2636 - removes stdin from the event loop, which we need if attaching 2637 in the foreground, otherwise on targets that report an initial 2638 stop on attach (which are most) we'd process input/commands 2639 while we're in the event loop waiting for that stop. That is, 2640 before the attach continuation runs and the command is really 2641 finished. */ 2642 target_terminal_inferior (); 2643 2644 /* Set up execution context to know that we should return from 2645 wait_for_inferior as soon as the target reports a stop. */ 2646 init_wait_for_inferior (); 2647 clear_proceed_status (0); 2648 2649 if (non_stop) 2650 { 2651 /* If we find that the current thread isn't stopped, explicitly 2652 do so now, because we're going to install breakpoints and 2653 poke at memory. */ 2654 2655 if (async_exec) 2656 /* The user requested an `attach&'; stop just one thread. */ 2657 target_stop (inferior_ptid); 2658 else 2659 /* The user requested an `attach', so stop all threads of this 2660 inferior. */ 2661 target_stop (pid_to_ptid (ptid_get_pid (inferior_ptid))); 2662 } 2663 2664 /* Some system don't generate traps when attaching to inferior. 2665 E.g. Mach 3 or GNU hurd. */ 2666 if (!target_attach_no_wait) 2667 { 2668 struct inferior *inferior = current_inferior (); 2669 2670 /* Careful here. See comments in inferior.h. Basically some 2671 OSes don't ignore SIGSTOPs on continue requests anymore. We 2672 need a way for handle_inferior_event to reset the stop_signal 2673 variable after an attach, and this is what 2674 STOP_QUIETLY_NO_SIGSTOP is for. */ 2675 inferior->control.stop_soon = STOP_QUIETLY_NO_SIGSTOP; 2676 2677 if (target_can_async_p ()) 2678 { 2679 /* sync_execution mode. Wait for stop. */ 2680 struct attach_command_continuation_args *a; 2681 2682 a = xmalloc (sizeof (*a)); 2683 a->args = xstrdup (args); 2684 a->from_tty = from_tty; 2685 a->async_exec = async_exec; 2686 add_inferior_continuation (attach_command_continuation, a, 2687 attach_command_continuation_free_args); 2688 return; 2689 } 2690 2691 wait_for_inferior (); 2692 } 2693 2694 attach_command_post_wait (args, from_tty, async_exec); 2695 } 2696 2697 /* We had just found out that the target was already attached to an 2698 inferior. PTID points at a thread of this new inferior, that is 2699 the most likely to be stopped right now, but not necessarily so. 2700 The new inferior is assumed to be already added to the inferior 2701 list at this point. If LEAVE_RUNNING, then leave the threads of 2702 this inferior running, except those we've explicitly seen reported 2703 as stopped. */ 2704 2705 void 2706 notice_new_inferior (ptid_t ptid, int leave_running, int from_tty) 2707 { 2708 struct cleanup* old_chain; 2709 int async_exec; 2710 2711 old_chain = make_cleanup (null_cleanup, NULL); 2712 2713 /* If in non-stop, leave threads as running as they were. If 2714 they're stopped for some reason other than us telling it to, the 2715 target reports a signal != GDB_SIGNAL_0. We don't try to 2716 resume threads with such a stop signal. */ 2717 async_exec = non_stop; 2718 2719 if (!ptid_equal (inferior_ptid, null_ptid)) 2720 make_cleanup_restore_current_thread (); 2721 2722 switch_to_thread (ptid); 2723 2724 /* When we "notice" a new inferior we need to do all the things we 2725 would normally do if we had just attached to it. */ 2726 2727 if (is_executing (inferior_ptid)) 2728 { 2729 struct inferior *inferior = current_inferior (); 2730 2731 /* We're going to install breakpoints, and poke at memory, 2732 ensure that the inferior is stopped for a moment while we do 2733 that. */ 2734 target_stop (inferior_ptid); 2735 2736 inferior->control.stop_soon = STOP_QUIETLY_REMOTE; 2737 2738 /* Wait for stop before proceeding. */ 2739 if (target_can_async_p ()) 2740 { 2741 struct attach_command_continuation_args *a; 2742 2743 a = xmalloc (sizeof (*a)); 2744 a->args = xstrdup (""); 2745 a->from_tty = from_tty; 2746 a->async_exec = async_exec; 2747 add_inferior_continuation (attach_command_continuation, a, 2748 attach_command_continuation_free_args); 2749 2750 do_cleanups (old_chain); 2751 return; 2752 } 2753 else 2754 wait_for_inferior (); 2755 } 2756 2757 async_exec = leave_running; 2758 attach_command_post_wait ("" /* args */, from_tty, async_exec); 2759 2760 do_cleanups (old_chain); 2761 } 2762 2763 /* 2764 * detach_command -- 2765 * takes a program previously attached to and detaches it. 2766 * The program resumes execution and will no longer stop 2767 * on signals, etc. We better not have left any breakpoints 2768 * in the program or it'll die when it hits one. For this 2769 * to work, it may be necessary for the process to have been 2770 * previously attached. It *might* work if the program was 2771 * started via the normal ptrace (PTRACE_TRACEME). 2772 */ 2773 2774 void 2775 detach_command (char *args, int from_tty) 2776 { 2777 dont_repeat (); /* Not for the faint of heart. */ 2778 2779 if (ptid_equal (inferior_ptid, null_ptid)) 2780 error (_("The program is not being run.")); 2781 2782 query_if_trace_running (from_tty); 2783 2784 disconnect_tracing (); 2785 2786 target_detach (args, from_tty); 2787 2788 /* If the solist is global across inferiors, don't clear it when we 2789 detach from a single inferior. */ 2790 if (!gdbarch_has_global_solist (target_gdbarch ())) 2791 no_shared_libraries (NULL, from_tty); 2792 2793 /* If we still have inferiors to debug, then don't mess with their 2794 threads. */ 2795 if (!have_inferiors ()) 2796 init_thread_list (); 2797 2798 if (deprecated_detach_hook) 2799 deprecated_detach_hook (); 2800 } 2801 2802 /* Disconnect from the current target without resuming it (leaving it 2803 waiting for a debugger). 2804 2805 We'd better not have left any breakpoints in the program or the 2806 next debugger will get confused. Currently only supported for some 2807 remote targets, since the normal attach mechanisms don't work on 2808 stopped processes on some native platforms (e.g. GNU/Linux). */ 2809 2810 static void 2811 disconnect_command (char *args, int from_tty) 2812 { 2813 dont_repeat (); /* Not for the faint of heart. */ 2814 query_if_trace_running (from_tty); 2815 disconnect_tracing (); 2816 target_disconnect (args, from_tty); 2817 no_shared_libraries (NULL, from_tty); 2818 init_thread_list (); 2819 if (deprecated_detach_hook) 2820 deprecated_detach_hook (); 2821 } 2822 2823 void 2824 interrupt_target_1 (int all_threads) 2825 { 2826 ptid_t ptid; 2827 2828 if (all_threads) 2829 ptid = minus_one_ptid; 2830 else 2831 ptid = inferior_ptid; 2832 target_stop (ptid); 2833 2834 /* Tag the thread as having been explicitly requested to stop, so 2835 other parts of gdb know not to resume this thread automatically, 2836 if it was stopped due to an internal event. Limit this to 2837 non-stop mode, as when debugging a multi-threaded application in 2838 all-stop mode, we will only get one stop event --- it's undefined 2839 which thread will report the event. */ 2840 if (non_stop) 2841 set_stop_requested (ptid, 1); 2842 } 2843 2844 /* interrupt [-a] 2845 Stop the execution of the target while running in async mode, in 2846 the backgound. In all-stop, stop the whole process. In non-stop 2847 mode, stop the current thread only by default, or stop all threads 2848 if the `-a' switch is used. */ 2849 2850 static void 2851 interrupt_command (char *args, int from_tty) 2852 { 2853 if (target_can_async_p ()) 2854 { 2855 int all_threads = 0; 2856 2857 dont_repeat (); /* Not for the faint of heart. */ 2858 2859 if (args != NULL 2860 && strncmp (args, "-a", sizeof ("-a") - 1) == 0) 2861 all_threads = 1; 2862 2863 if (!non_stop && all_threads) 2864 error (_("-a is meaningless in all-stop mode.")); 2865 2866 interrupt_target_1 (all_threads); 2867 } 2868 } 2869 2870 /* See inferior.h. */ 2871 2872 void 2873 default_print_float_info (struct gdbarch *gdbarch, struct ui_file *file, 2874 struct frame_info *frame, const char *args) 2875 { 2876 int regnum; 2877 int printed_something = 0; 2878 2879 for (regnum = 0; 2880 regnum < gdbarch_num_regs (gdbarch) 2881 + gdbarch_num_pseudo_regs (gdbarch); 2882 regnum++) 2883 { 2884 if (gdbarch_register_reggroup_p (gdbarch, regnum, float_reggroup)) 2885 { 2886 printed_something = 1; 2887 gdbarch_print_registers_info (gdbarch, file, frame, regnum, 1); 2888 } 2889 } 2890 if (!printed_something) 2891 fprintf_filtered (file, "No floating-point info " 2892 "available for this processor.\n"); 2893 } 2894 2895 static void 2896 float_info (char *args, int from_tty) 2897 { 2898 struct frame_info *frame; 2899 2900 if (!target_has_registers) 2901 error (_("The program has no registers now.")); 2902 2903 frame = get_selected_frame (NULL); 2904 gdbarch_print_float_info (get_frame_arch (frame), gdb_stdout, frame, args); 2905 } 2906 2907 static void 2908 unset_command (char *args, int from_tty) 2909 { 2910 printf_filtered (_("\"unset\" must be followed by the " 2911 "name of an unset subcommand.\n")); 2912 help_list (unsetlist, "unset ", all_commands, gdb_stdout); 2913 } 2914 2915 /* Implement `info proc' family of commands. */ 2916 2917 static void 2918 info_proc_cmd_1 (char *args, enum info_proc_what what, int from_tty) 2919 { 2920 struct gdbarch *gdbarch = get_current_arch (); 2921 2922 if (!target_info_proc (args, what)) 2923 { 2924 if (gdbarch_info_proc_p (gdbarch)) 2925 gdbarch_info_proc (gdbarch, args, what); 2926 else 2927 error (_("Not supported on this target.")); 2928 } 2929 } 2930 2931 /* Implement `info proc' when given without any futher parameters. */ 2932 2933 static void 2934 info_proc_cmd (char *args, int from_tty) 2935 { 2936 info_proc_cmd_1 (args, IP_MINIMAL, from_tty); 2937 } 2938 2939 /* Implement `info proc mappings'. */ 2940 2941 static void 2942 info_proc_cmd_mappings (char *args, int from_tty) 2943 { 2944 info_proc_cmd_1 (args, IP_MAPPINGS, from_tty); 2945 } 2946 2947 /* Implement `info proc stat'. */ 2948 2949 static void 2950 info_proc_cmd_stat (char *args, int from_tty) 2951 { 2952 info_proc_cmd_1 (args, IP_STAT, from_tty); 2953 } 2954 2955 /* Implement `info proc status'. */ 2956 2957 static void 2958 info_proc_cmd_status (char *args, int from_tty) 2959 { 2960 info_proc_cmd_1 (args, IP_STATUS, from_tty); 2961 } 2962 2963 /* Implement `info proc cwd'. */ 2964 2965 static void 2966 info_proc_cmd_cwd (char *args, int from_tty) 2967 { 2968 info_proc_cmd_1 (args, IP_CWD, from_tty); 2969 } 2970 2971 /* Implement `info proc cmdline'. */ 2972 2973 static void 2974 info_proc_cmd_cmdline (char *args, int from_tty) 2975 { 2976 info_proc_cmd_1 (args, IP_CMDLINE, from_tty); 2977 } 2978 2979 /* Implement `info proc exe'. */ 2980 2981 static void 2982 info_proc_cmd_exe (char *args, int from_tty) 2983 { 2984 info_proc_cmd_1 (args, IP_EXE, from_tty); 2985 } 2986 2987 /* Implement `info proc all'. */ 2988 2989 static void 2990 info_proc_cmd_all (char *args, int from_tty) 2991 { 2992 info_proc_cmd_1 (args, IP_ALL, from_tty); 2993 } 2994 2995 void 2996 _initialize_infcmd (void) 2997 { 2998 static struct cmd_list_element *info_proc_cmdlist; 2999 struct cmd_list_element *c = NULL; 3000 const char *cmd_name; 3001 3002 /* Add the filename of the terminal connected to inferior I/O. */ 3003 add_setshow_filename_cmd ("inferior-tty", class_run, 3004 &inferior_io_terminal_scratch, _("\ 3005 Set terminal for future runs of program being debugged."), _("\ 3006 Show terminal for future runs of program being debugged."), _("\ 3007 Usage: set inferior-tty /dev/pts/1"), 3008 set_inferior_tty_command, 3009 show_inferior_tty_command, 3010 &setlist, &showlist); 3011 add_com_alias ("tty", "set inferior-tty", class_alias, 0); 3012 3013 cmd_name = "args"; 3014 add_setshow_string_noescape_cmd (cmd_name, class_run, 3015 &inferior_args_scratch, _("\ 3016 Set argument list to give program being debugged when it is started."), _("\ 3017 Show argument list to give program being debugged when it is started."), _("\ 3018 Follow this command with any number of args, to be passed to the program."), 3019 set_args_command, 3020 show_args_command, 3021 &setlist, &showlist); 3022 c = lookup_cmd (&cmd_name, setlist, "", -1, 1); 3023 gdb_assert (c != NULL); 3024 set_cmd_completer (c, filename_completer); 3025 3026 c = add_cmd ("environment", no_class, environment_info, _("\ 3027 The environment to give the program, or one variable's value.\n\ 3028 With an argument VAR, prints the value of environment variable VAR to\n\ 3029 give the program being debugged. With no arguments, prints the entire\n\ 3030 environment to be given to the program."), &showlist); 3031 set_cmd_completer (c, noop_completer); 3032 3033 add_prefix_cmd ("unset", no_class, unset_command, 3034 _("Complement to certain \"set\" commands."), 3035 &unsetlist, "unset ", 0, &cmdlist); 3036 3037 c = add_cmd ("environment", class_run, unset_environment_command, _("\ 3038 Cancel environment variable VAR for the program.\n\ 3039 This does not affect the program until the next \"run\" command."), 3040 &unsetlist); 3041 set_cmd_completer (c, noop_completer); 3042 3043 c = add_cmd ("environment", class_run, set_environment_command, _("\ 3044 Set environment variable value to give the program.\n\ 3045 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\ 3046 VALUES of environment variables are uninterpreted strings.\n\ 3047 This does not affect the program until the next \"run\" command."), 3048 &setlist); 3049 set_cmd_completer (c, noop_completer); 3050 3051 c = add_com ("path", class_files, path_command, _("\ 3052 Add directory DIR(s) to beginning of search path for object files.\n\ 3053 $cwd in the path means the current working directory.\n\ 3054 This path is equivalent to the $PATH shell variable. It is a list of\n\ 3055 directories, separated by colons. These directories are searched to find\n\ 3056 fully linked executable files and separately compiled object files as \ 3057 needed.")); 3058 set_cmd_completer (c, filename_completer); 3059 3060 c = add_cmd ("paths", no_class, path_info, _("\ 3061 Current search path for finding object files.\n\ 3062 $cwd in the path means the current working directory.\n\ 3063 This path is equivalent to the $PATH shell variable. It is a list of\n\ 3064 directories, separated by colons. These directories are searched to find\n\ 3065 fully linked executable files and separately compiled object files as \ 3066 needed."), 3067 &showlist); 3068 set_cmd_completer (c, noop_completer); 3069 3070 add_prefix_cmd ("kill", class_run, kill_command, 3071 _("Kill execution of program being debugged."), 3072 &killlist, "kill ", 0, &cmdlist); 3073 3074 add_com ("attach", class_run, attach_command, _("\ 3075 Attach to a process or file outside of GDB.\n\ 3076 This command attaches to another target, of the same type as your last\n\ 3077 \"target\" command (\"info files\" will show your target stack).\n\ 3078 The command may take as argument a process id or a device file.\n\ 3079 For a process id, you must have permission to send the process a signal,\n\ 3080 and it must have the same effective uid as the debugger.\n\ 3081 When using \"attach\" with a process id, the debugger finds the\n\ 3082 program running in the process, looking first in the current working\n\ 3083 directory, or (if not found there) using the source file search path\n\ 3084 (see the \"directory\" command). You can also use the \"file\" command\n\ 3085 to specify the program, and to load its symbol table.")); 3086 3087 add_prefix_cmd ("detach", class_run, detach_command, _("\ 3088 Detach a process or file previously attached.\n\ 3089 If a process, it is no longer traced, and it continues its execution. If\n\ 3090 you were debugging a file, the file is closed and gdb no longer accesses it."), 3091 &detachlist, "detach ", 0, &cmdlist); 3092 3093 add_com ("disconnect", class_run, disconnect_command, _("\ 3094 Disconnect from a target.\n\ 3095 The target will wait for another debugger to connect. Not available for\n\ 3096 all targets.")); 3097 3098 c = add_com ("signal", class_run, signal_command, _("\ 3099 Continue program with the specified signal.\n\ 3100 Usage: signal SIGNAL\n\ 3101 The SIGNAL argument is processed the same as the handle command.\n\ 3102 \n\ 3103 An argument of \"0\" means continue the program without sending it a signal.\n\ 3104 This is useful in cases where the program stopped because of a signal,\n\ 3105 and you want to resume the program while discarding the signal.\n\ 3106 \n\ 3107 In a multi-threaded program the signal is delivered to, or discarded from,\n\ 3108 the current thread only.")); 3109 set_cmd_completer (c, signal_completer); 3110 3111 c = add_com ("queue-signal", class_run, queue_signal_command, _("\ 3112 Queue a signal to be delivered to the current thread when it is resumed.\n\ 3113 Usage: queue-signal SIGNAL\n\ 3114 The SIGNAL argument is processed the same as the handle command.\n\ 3115 It is an error if the handling state of SIGNAL is \"nopass\".\n\ 3116 \n\ 3117 An argument of \"0\" means remove any currently queued signal from\n\ 3118 the current thread. This is useful in cases where the program stopped\n\ 3119 because of a signal, and you want to resume it while discarding the signal.\n\ 3120 \n\ 3121 In a multi-threaded program the signal is queued with, or discarded from,\n\ 3122 the current thread only.")); 3123 set_cmd_completer (c, signal_completer); 3124 3125 add_com ("stepi", class_run, stepi_command, _("\ 3126 Step one instruction exactly.\n\ 3127 Usage: stepi [N]\n\ 3128 Argument N means step N times (or till program stops for another \ 3129 reason).")); 3130 add_com_alias ("si", "stepi", class_alias, 0); 3131 3132 add_com ("nexti", class_run, nexti_command, _("\ 3133 Step one instruction, but proceed through subroutine calls.\n\ 3134 Usage: nexti [N]\n\ 3135 Argument N means step N times (or till program stops for another \ 3136 reason).")); 3137 add_com_alias ("ni", "nexti", class_alias, 0); 3138 3139 add_com ("finish", class_run, finish_command, _("\ 3140 Execute until selected stack frame returns.\n\ 3141 Usage: finish\n\ 3142 Upon return, the value returned is printed and put in the value history.")); 3143 add_com_alias ("fin", "finish", class_run, 1); 3144 3145 add_com ("next", class_run, next_command, _("\ 3146 Step program, proceeding through subroutine calls.\n\ 3147 Usage: next [N]\n\ 3148 Unlike \"step\", if the current source line calls a subroutine,\n\ 3149 this command does not enter the subroutine, but instead steps over\n\ 3150 the call, in effect treating it as a single source line.")); 3151 add_com_alias ("n", "next", class_run, 1); 3152 if (xdb_commands) 3153 add_com_alias ("S", "next", class_run, 1); 3154 3155 add_com ("step", class_run, step_command, _("\ 3156 Step program until it reaches a different source line.\n\ 3157 Usage: step [N]\n\ 3158 Argument N means step N times (or till program stops for another \ 3159 reason).")); 3160 add_com_alias ("s", "step", class_run, 1); 3161 3162 c = add_com ("until", class_run, until_command, _("\ 3163 Execute until the program reaches a source line greater than the current\n\ 3164 or a specified location (same args as break command) within the current \ 3165 frame.")); 3166 set_cmd_completer (c, location_completer); 3167 add_com_alias ("u", "until", class_run, 1); 3168 3169 c = add_com ("advance", class_run, advance_command, _("\ 3170 Continue the program up to the given location (same form as args for break \ 3171 command).\n\ 3172 Execution will also stop upon exit from the current stack frame.")); 3173 set_cmd_completer (c, location_completer); 3174 3175 c = add_com ("jump", class_run, jump_command, _("\ 3176 Continue program being debugged at specified line or address.\n\ 3177 Usage: jump <location>\n\ 3178 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\ 3179 for an address to start at.")); 3180 set_cmd_completer (c, location_completer); 3181 add_com_alias ("j", "jump", class_run, 1); 3182 3183 if (xdb_commands) 3184 { 3185 c = add_com ("go", class_run, go_command, _("\ 3186 Usage: go <location>\n\ 3187 Continue program being debugged, stopping at specified line or \n\ 3188 address.\n\ 3189 Give as argument either LINENUM or *ADDR, where ADDR is an \n\ 3190 expression for an address to start at.\n\ 3191 This command is a combination of tbreak and jump.")); 3192 set_cmd_completer (c, location_completer); 3193 } 3194 3195 if (xdb_commands) 3196 add_com_alias ("g", "go", class_run, 1); 3197 3198 add_com ("continue", class_run, continue_command, _("\ 3199 Continue program being debugged, after signal or breakpoint.\n\ 3200 Usage: continue [N]\n\ 3201 If proceeding from breakpoint, a number N may be used as an argument,\n\ 3202 which means to set the ignore count of that breakpoint to N - 1 (so that\n\ 3203 the breakpoint won't break until the Nth time it is reached).\n\ 3204 \n\ 3205 If non-stop mode is enabled, continue only the current thread,\n\ 3206 otherwise all the threads in the program are continued. To \n\ 3207 continue all stopped threads in non-stop mode, use the -a option.\n\ 3208 Specifying -a and an ignore count simultaneously is an error.")); 3209 add_com_alias ("c", "cont", class_run, 1); 3210 add_com_alias ("fg", "cont", class_run, 1); 3211 3212 c = add_com ("run", class_run, run_command, _("\ 3213 Start debugged program. You may specify arguments to give it.\n\ 3214 Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\ 3215 Input and output redirection with \">\", \"<\", or \">>\" are also \ 3216 allowed.\n\n\ 3217 With no arguments, uses arguments last specified (with \"run\" \ 3218 or \"set args\").\n\ 3219 To cancel previous arguments and run with no arguments,\n\ 3220 use \"set args\" without arguments.")); 3221 set_cmd_completer (c, filename_completer); 3222 add_com_alias ("r", "run", class_run, 1); 3223 if (xdb_commands) 3224 add_com ("R", class_run, run_no_args_command, 3225 _("Start debugged program with no arguments.")); 3226 3227 c = add_com ("start", class_run, start_command, _("\ 3228 Run the debugged program until the beginning of the main procedure.\n\ 3229 You may specify arguments to give to your program, just as with the\n\ 3230 \"run\" command.")); 3231 set_cmd_completer (c, filename_completer); 3232 3233 add_com ("interrupt", class_run, interrupt_command, 3234 _("Interrupt the execution of the debugged program.\n\ 3235 If non-stop mode is enabled, interrupt only the current thread,\n\ 3236 otherwise all the threads in the program are stopped. To \n\ 3237 interrupt all running threads in non-stop mode, use the -a option.")); 3238 3239 c = add_info ("registers", nofp_registers_info, _("\ 3240 List of integer registers and their contents, for selected stack frame.\n\ 3241 Register name as argument means describe only that register.")); 3242 add_info_alias ("r", "registers", 1); 3243 set_cmd_completer (c, reg_or_group_completer); 3244 3245 if (xdb_commands) 3246 { 3247 c = add_com ("lr", class_info, nofp_registers_info, _("\ 3248 List of integer registers and their contents, for selected stack frame.\n\ 3249 Register name as argument means describe only that register.")); 3250 set_cmd_completer (c, reg_or_group_completer); 3251 } 3252 3253 c = add_info ("all-registers", all_registers_info, _("\ 3254 List of all registers and their contents, for selected stack frame.\n\ 3255 Register name as argument means describe only that register.")); 3256 set_cmd_completer (c, reg_or_group_completer); 3257 3258 add_info ("program", program_info, 3259 _("Execution status of the program.")); 3260 3261 add_info ("float", float_info, 3262 _("Print the status of the floating point unit\n")); 3263 3264 add_info ("vector", vector_info, 3265 _("Print the status of the vector unit\n")); 3266 3267 add_prefix_cmd ("proc", class_info, info_proc_cmd, 3268 _("\ 3269 Show /proc process information about any running process.\n\ 3270 Specify any process id, or use the program being debugged by default."), 3271 &info_proc_cmdlist, "info proc ", 3272 1/*allow-unknown*/, &infolist); 3273 3274 add_cmd ("mappings", class_info, info_proc_cmd_mappings, _("\ 3275 List of mapped memory regions."), 3276 &info_proc_cmdlist); 3277 3278 add_cmd ("stat", class_info, info_proc_cmd_stat, _("\ 3279 List process info from /proc/PID/stat."), 3280 &info_proc_cmdlist); 3281 3282 add_cmd ("status", class_info, info_proc_cmd_status, _("\ 3283 List process info from /proc/PID/status."), 3284 &info_proc_cmdlist); 3285 3286 add_cmd ("cwd", class_info, info_proc_cmd_cwd, _("\ 3287 List current working directory of the process."), 3288 &info_proc_cmdlist); 3289 3290 add_cmd ("cmdline", class_info, info_proc_cmd_cmdline, _("\ 3291 List command line arguments of the process."), 3292 &info_proc_cmdlist); 3293 3294 add_cmd ("exe", class_info, info_proc_cmd_exe, _("\ 3295 List absolute filename for executable of the process."), 3296 &info_proc_cmdlist); 3297 3298 add_cmd ("all", class_info, info_proc_cmd_all, _("\ 3299 List all available /proc info."), 3300 &info_proc_cmdlist); 3301 } 3302