1 /* Memory-access and commands for "inferior" process, for GDB. 2 3 Copyright (C) 1986-2012 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 "gdb_string.h" 24 #include "symtab.h" 25 #include "gdbtypes.h" 26 #include "frame.h" 27 #include "inferior.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 "symfile.h" 36 #include "objfiles.h" 37 #include "completer.h" 38 #include "ui-out.h" 39 #include "event-top.h" 40 #include "parser-defs.h" 41 #include "regcache.h" 42 #include "reggroups.h" 43 #include "block.h" 44 #include "solib.h" 45 #include <ctype.h> 46 #include "gdb_assert.h" 47 #include "observer.h" 48 #include "target-descriptions.h" 49 #include "user-regs.h" 50 #include "exceptions.h" 51 #include "cli/cli-decode.h" 52 #include "gdbthread.h" 53 #include "valprint.h" 54 #include "inline-frame.h" 55 #include "tracepoint.h" 56 #include "inf-loop.h" 57 #include "continuations.h" 58 #include "linespec.h" 59 60 /* Functions exported for general use, in inferior.h: */ 61 62 void all_registers_info (char *, int); 63 64 void registers_info (char *, int); 65 66 void nexti_command (char *, int); 67 68 void stepi_command (char *, int); 69 70 void continue_command (char *, int); 71 72 void interrupt_target_command (char *args, int from_tty); 73 74 /* Local functions: */ 75 76 static void nofp_registers_info (char *, int); 77 78 static void print_return_value (struct type *func_type, 79 struct type *value_type); 80 81 static void until_next_command (int); 82 83 static void until_command (char *, int); 84 85 static void path_info (char *, int); 86 87 static void path_command (char *, int); 88 89 static void unset_command (char *, int); 90 91 static void float_info (char *, int); 92 93 static void disconnect_command (char *, int); 94 95 static void unset_environment_command (char *, int); 96 97 static void set_environment_command (char *, int); 98 99 static void environment_info (char *, int); 100 101 static void program_info (char *, int); 102 103 static void finish_command (char *, int); 104 105 static void signal_command (char *, int); 106 107 static void jump_command (char *, int); 108 109 static void step_1 (int, int, char *); 110 static void step_once (int skip_subroutines, int single_inst, 111 int count, int thread); 112 113 static void next_command (char *, int); 114 115 static void step_command (char *, int); 116 117 static void run_command (char *, int); 118 119 static void run_no_args_command (char *args, int from_tty); 120 121 static void go_command (char *line_no, int from_tty); 122 123 static int strip_bg_char (char **); 124 125 void _initialize_infcmd (void); 126 127 #define ERROR_NO_INFERIOR \ 128 if (!target_has_execution) error (_("The program is not being run.")); 129 130 /* Scratch area where string containing arguments to give to the 131 program will be stored by 'set args'. As soon as anything is 132 stored, notice_args_set will move it into per-inferior storage. 133 Arguments are separated by spaces. Empty string (pointer to '\0') 134 means no args. */ 135 136 static char *inferior_args_scratch; 137 138 /* Scratch area where 'set inferior-tty' will store user-provided value. 139 We'll immediate copy it into per-inferior storage. */ 140 141 static char *inferior_io_terminal_scratch; 142 143 /* Pid of our debugged inferior, or 0 if no inferior now. 144 Since various parts of infrun.c test this to see whether there is a program 145 being debugged it should be nonzero (currently 3 is used) for remote 146 debugging. */ 147 148 ptid_t inferior_ptid; 149 150 /* Address at which inferior stopped. */ 151 152 CORE_ADDR stop_pc; 153 154 /* Flag indicating that a command has proceeded the inferior past the 155 current breakpoint. */ 156 157 int breakpoint_proceeded; 158 159 /* Nonzero if stopped due to completion of a stack dummy routine. */ 160 161 enum stop_stack_kind stop_stack_dummy; 162 163 /* Nonzero if stopped due to a random (unexpected) signal in inferior 164 process. */ 165 166 int stopped_by_random_signal; 167 168 169 /* Accessor routines. */ 170 171 /* Set the io terminal for the current inferior. Ownership of 172 TERMINAL_NAME is not transferred. */ 173 174 void 175 set_inferior_io_terminal (const char *terminal_name) 176 { 177 xfree (current_inferior ()->terminal); 178 current_inferior ()->terminal = terminal_name ? xstrdup (terminal_name) : 0; 179 } 180 181 const char * 182 get_inferior_io_terminal (void) 183 { 184 return current_inferior ()->terminal; 185 } 186 187 static void 188 set_inferior_tty_command (char *args, int from_tty, 189 struct cmd_list_element *c) 190 { 191 /* CLI has assigned the user-provided value to inferior_io_terminal_scratch. 192 Now route it to current inferior. */ 193 set_inferior_io_terminal (inferior_io_terminal_scratch); 194 } 195 196 static void 197 show_inferior_tty_command (struct ui_file *file, int from_tty, 198 struct cmd_list_element *c, const char *value) 199 { 200 /* Note that we ignore the passed-in value in favor of computing it 201 directly. */ 202 const char *inferior_io_terminal = get_inferior_io_terminal (); 203 204 if (inferior_io_terminal == NULL) 205 inferior_io_terminal = ""; 206 fprintf_filtered (gdb_stdout, 207 _("Terminal for future runs of program being debugged " 208 "is \"%s\".\n"), inferior_io_terminal); 209 } 210 211 char * 212 get_inferior_args (void) 213 { 214 if (current_inferior ()->argc != 0) 215 { 216 char *n; 217 218 n = construct_inferior_arguments (current_inferior ()->argc, 219 current_inferior ()->argv); 220 set_inferior_args (n); 221 xfree (n); 222 } 223 224 if (current_inferior ()->args == NULL) 225 current_inferior ()->args = xstrdup (""); 226 227 return current_inferior ()->args; 228 } 229 230 /* Set the arguments for the current inferior. Ownership of 231 NEWARGS is not transferred. */ 232 233 void 234 set_inferior_args (char *newargs) 235 { 236 xfree (current_inferior ()->args); 237 current_inferior ()->args = newargs ? xstrdup (newargs) : NULL; 238 current_inferior ()->argc = 0; 239 current_inferior ()->argv = 0; 240 } 241 242 void 243 set_inferior_args_vector (int argc, char **argv) 244 { 245 current_inferior ()->argc = argc; 246 current_inferior ()->argv = argv; 247 } 248 249 /* Notice when `set args' is run. */ 250 static void 251 set_args_command (char *args, int from_tty, struct cmd_list_element *c) 252 { 253 /* CLI has assigned the user-provided value to inferior_args_scratch. 254 Now route it to current inferior. */ 255 set_inferior_args (inferior_args_scratch); 256 } 257 258 /* Notice when `show args' is run. */ 259 static void 260 show_args_command (struct ui_file *file, int from_tty, 261 struct cmd_list_element *c, const char *value) 262 { 263 /* Note that we ignore the passed-in value in favor of computing it 264 directly. */ 265 deprecated_show_value_hack (file, from_tty, c, get_inferior_args ()); 266 } 267 268 269 /* Compute command-line string given argument vector. This does the 270 same shell processing as fork_inferior. */ 271 char * 272 construct_inferior_arguments (int argc, char **argv) 273 { 274 char *result; 275 276 if (STARTUP_WITH_SHELL) 277 { 278 /* This holds all the characters considered special to the 279 typical Unix shells. We include `^' because the SunOS 280 /bin/sh treats it as a synonym for `|'. */ 281 char *special = "\"!#$&*()\\|[]{}<>?'\"`~^; \t\n"; 282 int i; 283 int length = 0; 284 char *out, *cp; 285 286 /* We over-compute the size. It shouldn't matter. */ 287 for (i = 0; i < argc; ++i) 288 length += 3 * strlen (argv[i]) + 1 + 2 * (argv[i][0] == '\0'); 289 290 result = (char *) xmalloc (length); 291 out = result; 292 293 for (i = 0; i < argc; ++i) 294 { 295 if (i > 0) 296 *out++ = ' '; 297 298 /* Need to handle empty arguments specially. */ 299 if (argv[i][0] == '\0') 300 { 301 *out++ = '\''; 302 *out++ = '\''; 303 } 304 else 305 { 306 for (cp = argv[i]; *cp; ++cp) 307 { 308 if (*cp == '\n') 309 { 310 /* A newline cannot be quoted with a backslash (it 311 just disappears), only by putting it inside 312 quotes. */ 313 *out++ = '\''; 314 *out++ = '\n'; 315 *out++ = '\''; 316 } 317 else 318 { 319 if (strchr (special, *cp) != NULL) 320 *out++ = '\\'; 321 *out++ = *cp; 322 } 323 } 324 } 325 } 326 *out = '\0'; 327 } 328 else 329 { 330 /* In this case we can't handle arguments that contain spaces, 331 tabs, or newlines -- see breakup_args(). */ 332 int i; 333 int length = 0; 334 335 for (i = 0; i < argc; ++i) 336 { 337 char *cp = strchr (argv[i], ' '); 338 if (cp == NULL) 339 cp = strchr (argv[i], '\t'); 340 if (cp == NULL) 341 cp = strchr (argv[i], '\n'); 342 if (cp != NULL) 343 error (_("can't handle command-line " 344 "argument containing whitespace")); 345 length += strlen (argv[i]) + 1; 346 } 347 348 result = (char *) xmalloc (length); 349 result[0] = '\0'; 350 for (i = 0; i < argc; ++i) 351 { 352 if (i > 0) 353 strcat (result, " "); 354 strcat (result, argv[i]); 355 } 356 } 357 358 return result; 359 } 360 361 362 /* This function detects whether or not a '&' character (indicating 363 background execution) has been added as *the last* of the arguments ARGS 364 of a command. If it has, it removes it and returns 1. Otherwise it 365 does nothing and returns 0. */ 366 static int 367 strip_bg_char (char **args) 368 { 369 char *p = NULL; 370 371 p = strchr (*args, '&'); 372 373 if (p) 374 { 375 if (p == (*args + strlen (*args) - 1)) 376 { 377 if (strlen (*args) > 1) 378 { 379 do 380 p--; 381 while (*p == ' ' || *p == '\t'); 382 *(p + 1) = '\0'; 383 } 384 else 385 *args = 0; 386 return 1; 387 } 388 } 389 return 0; 390 } 391 392 /* Common actions to take after creating any sort of inferior, by any 393 means (running, attaching, connecting, et cetera). The target 394 should be stopped. */ 395 396 void 397 post_create_inferior (struct target_ops *target, int from_tty) 398 { 399 volatile struct gdb_exception ex; 400 401 /* Be sure we own the terminal in case write operations are performed. */ 402 target_terminal_ours (); 403 404 /* If the target hasn't taken care of this already, do it now. 405 Targets which need to access registers during to_open, 406 to_create_inferior, or to_attach should do it earlier; but many 407 don't need to. */ 408 target_find_description (); 409 410 /* Now that we know the register layout, retrieve current PC. But 411 if the PC is unavailable (e.g., we're opening a core file with 412 missing registers info), ignore it. */ 413 stop_pc = 0; 414 TRY_CATCH (ex, RETURN_MASK_ERROR) 415 { 416 stop_pc = regcache_read_pc (get_current_regcache ()); 417 } 418 if (ex.reason < 0 && ex.error != NOT_AVAILABLE_ERROR) 419 throw_exception (ex); 420 421 if (exec_bfd) 422 { 423 const unsigned solib_add_generation 424 = current_program_space->solib_add_generation; 425 426 /* Create the hooks to handle shared library load and unload 427 events. */ 428 #ifdef SOLIB_CREATE_INFERIOR_HOOK 429 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid)); 430 #else 431 solib_create_inferior_hook (from_tty); 432 #endif 433 434 if (current_program_space->solib_add_generation == solib_add_generation) 435 { 436 /* The platform-specific hook should load initial shared libraries, 437 but didn't. FROM_TTY will be incorrectly 0 but such solib 438 targets should be fixed anyway. Call it only after the solib 439 target has been initialized by solib_create_inferior_hook. */ 440 441 if (info_verbose) 442 warning (_("platform-specific solib_create_inferior_hook did " 443 "not load initial shared libraries.")); 444 445 /* If the solist is global across processes, there's no need to 446 refetch it here. */ 447 if (!gdbarch_has_global_solist (target_gdbarch)) 448 { 449 #ifdef SOLIB_ADD 450 SOLIB_ADD (NULL, 0, target, auto_solib_add); 451 #else 452 solib_add (NULL, 0, target, auto_solib_add); 453 #endif 454 } 455 } 456 } 457 458 /* If the user sets watchpoints before execution having started, 459 then she gets software watchpoints, because GDB can't know which 460 target will end up being pushed, or if it supports hardware 461 watchpoints or not. breakpoint_re_set takes care of promoting 462 watchpoints to hardware watchpoints if possible, however, if this 463 new inferior doesn't load shared libraries or we don't pull in 464 symbols from any other source on this target/arch, 465 breakpoint_re_set is never called. Call it now so that software 466 watchpoints get a chance to be promoted to hardware watchpoints 467 if the now pushed target supports hardware watchpoints. */ 468 breakpoint_re_set (); 469 470 observer_notify_inferior_created (target, from_tty); 471 } 472 473 /* Kill the inferior if already running. This function is designed 474 to be called when we are about to start the execution of the program 475 from the beginning. Ask the user to confirm that he wants to restart 476 the program being debugged when FROM_TTY is non-null. */ 477 478 static void 479 kill_if_already_running (int from_tty) 480 { 481 if (! ptid_equal (inferior_ptid, null_ptid) && target_has_execution) 482 { 483 /* Bail out before killing the program if we will not be able to 484 restart it. */ 485 target_require_runnable (); 486 487 if (from_tty 488 && !query (_("The program being debugged has been started already.\n\ 489 Start it from the beginning? "))) 490 error (_("Program not restarted.")); 491 target_kill (); 492 } 493 } 494 495 /* Implement the "run" command. If TBREAK_AT_MAIN is set, then insert 496 a temporary breakpoint at the begining of the main program before 497 running the program. */ 498 499 static void 500 run_command_1 (char *args, int from_tty, int tbreak_at_main) 501 { 502 char *exec_file; 503 struct cleanup *old_chain; 504 ptid_t ptid; 505 struct ui_out *uiout = current_uiout; 506 507 dont_repeat (); 508 509 kill_if_already_running (from_tty); 510 511 init_wait_for_inferior (); 512 clear_breakpoint_hit_counts (); 513 514 /* Clean up any leftovers from other runs. Some other things from 515 this function should probably be moved into target_pre_inferior. */ 516 target_pre_inferior (from_tty); 517 518 /* The comment here used to read, "The exec file is re-read every 519 time we do a generic_mourn_inferior, so we just have to worry 520 about the symbol file." The `generic_mourn_inferior' function 521 gets called whenever the program exits. However, suppose the 522 program exits, and *then* the executable file changes? We need 523 to check again here. Since reopen_exec_file doesn't do anything 524 if the timestamp hasn't changed, I don't see the harm. */ 525 reopen_exec_file (); 526 reread_symbols (); 527 528 /* Insert the temporary breakpoint if a location was specified. */ 529 if (tbreak_at_main) 530 tbreak_command (main_name (), 0); 531 532 exec_file = (char *) get_exec_file (0); 533 534 if (non_stop && !target_supports_non_stop ()) 535 error (_("The target does not support running in non-stop mode.")); 536 537 /* We keep symbols from add-symbol-file, on the grounds that the 538 user might want to add some symbols before running the program 539 (right?). But sometimes (dynamic loading where the user manually 540 introduces the new symbols with add-symbol-file), the code which 541 the symbols describe does not persist between runs. Currently 542 the user has to manually nuke all symbols between runs if they 543 want them to go away (PR 2207). This is probably reasonable. */ 544 545 if (!args) 546 { 547 if (target_can_async_p ()) 548 async_disable_stdin (); 549 } 550 else 551 { 552 int async_exec = strip_bg_char (&args); 553 554 /* If we get a request for running in the bg but the target 555 doesn't support it, error out. */ 556 if (async_exec && !target_can_async_p ()) 557 error (_("Asynchronous execution not supported on this target.")); 558 559 /* If we don't get a request of running in the bg, then we need 560 to simulate synchronous (fg) execution. */ 561 if (!async_exec && target_can_async_p ()) 562 { 563 /* Simulate synchronous execution. */ 564 async_disable_stdin (); 565 } 566 567 /* If there were other args, beside '&', process them. */ 568 if (args) 569 set_inferior_args (args); 570 } 571 572 if (from_tty) 573 { 574 ui_out_field_string (uiout, NULL, "Starting program"); 575 ui_out_text (uiout, ": "); 576 if (exec_file) 577 ui_out_field_string (uiout, "execfile", exec_file); 578 ui_out_spaces (uiout, 1); 579 /* We call get_inferior_args() because we might need to compute 580 the value now. */ 581 ui_out_field_string (uiout, "infargs", get_inferior_args ()); 582 ui_out_text (uiout, "\n"); 583 ui_out_flush (uiout); 584 } 585 586 /* We call get_inferior_args() because we might need to compute 587 the value now. */ 588 target_create_inferior (exec_file, get_inferior_args (), 589 environ_vector (current_inferior ()->environment), 590 from_tty); 591 592 /* We're starting off a new process. When we get out of here, in 593 non-stop mode, finish the state of all threads of that process, 594 but leave other threads alone, as they may be stopped in internal 595 events --- the frontend shouldn't see them as stopped. In 596 all-stop, always finish the state of all threads, as we may be 597 resuming more than just the new process. */ 598 if (non_stop) 599 ptid = pid_to_ptid (ptid_get_pid (inferior_ptid)); 600 else 601 ptid = minus_one_ptid; 602 old_chain = make_cleanup (finish_thread_state_cleanup, &ptid); 603 604 /* Pass zero for FROM_TTY, because at this point the "run" command 605 has done its thing; now we are setting up the running program. */ 606 post_create_inferior (¤t_target, 0); 607 608 /* Start the target running. Do not use -1 continuation as it would skip 609 breakpoint right at the entry point. */ 610 proceed (regcache_read_pc (get_current_regcache ()), TARGET_SIGNAL_0, 0); 611 612 /* Since there was no error, there's no need to finish the thread 613 states here. */ 614 discard_cleanups (old_chain); 615 } 616 617 static void 618 run_command (char *args, int from_tty) 619 { 620 run_command_1 (args, from_tty, 0); 621 } 622 623 static void 624 run_no_args_command (char *args, int from_tty) 625 { 626 set_inferior_args (""); 627 } 628 629 630 /* Start the execution of the program up until the beginning of the main 631 program. */ 632 633 static void 634 start_command (char *args, int from_tty) 635 { 636 /* Some languages such as Ada need to search inside the program 637 minimal symbols for the location where to put the temporary 638 breakpoint before starting. */ 639 if (!have_minimal_symbols ()) 640 error (_("No symbol table loaded. Use the \"file\" command.")); 641 642 /* Run the program until reaching the main procedure... */ 643 run_command_1 (args, from_tty, 1); 644 } 645 646 static int 647 proceed_thread_callback (struct thread_info *thread, void *arg) 648 { 649 /* We go through all threads individually instead of compressing 650 into a single target `resume_all' request, because some threads 651 may be stopped in internal breakpoints/events, or stopped waiting 652 for its turn in the displaced stepping queue (that is, they are 653 running && !executing). The target side has no idea about why 654 the thread is stopped, so a `resume_all' command would resume too 655 much. If/when GDB gains a way to tell the target `hold this 656 thread stopped until I say otherwise', then we can optimize 657 this. */ 658 if (!is_stopped (thread->ptid)) 659 return 0; 660 661 switch_to_thread (thread->ptid); 662 clear_proceed_status (); 663 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0); 664 return 0; 665 } 666 667 void 668 ensure_valid_thread (void) 669 { 670 if (ptid_equal (inferior_ptid, null_ptid) 671 || is_exited (inferior_ptid)) 672 error (_("Cannot execute this command without a live selected thread.")); 673 } 674 675 /* If the user is looking at trace frames, any resumption of execution 676 is likely to mix up recorded and live target data. So simply 677 disallow those commands. */ 678 679 void 680 ensure_not_tfind_mode (void) 681 { 682 if (get_traceframe_number () >= 0) 683 error (_("Cannot execute this command while looking at trace frames.")); 684 } 685 686 void 687 continue_1 (int all_threads) 688 { 689 ERROR_NO_INFERIOR; 690 ensure_not_tfind_mode (); 691 692 if (non_stop && all_threads) 693 { 694 /* Don't error out if the current thread is running, because 695 there may be other stopped threads. */ 696 struct cleanup *old_chain; 697 698 /* Backup current thread and selected frame. */ 699 old_chain = make_cleanup_restore_current_thread (); 700 701 iterate_over_threads (proceed_thread_callback, NULL); 702 703 /* Restore selected ptid. */ 704 do_cleanups (old_chain); 705 } 706 else 707 { 708 ensure_valid_thread (); 709 ensure_not_running (); 710 clear_proceed_status (); 711 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0); 712 } 713 } 714 715 /* continue [-a] [proceed-count] [&] */ 716 void 717 continue_command (char *args, int from_tty) 718 { 719 int async_exec = 0; 720 int all_threads = 0; 721 ERROR_NO_INFERIOR; 722 723 /* Find out whether we must run in the background. */ 724 if (args != NULL) 725 async_exec = strip_bg_char (&args); 726 727 /* If we must run in the background, but the target can't do it, 728 error out. */ 729 if (async_exec && !target_can_async_p ()) 730 error (_("Asynchronous execution not supported on this target.")); 731 732 /* If we are not asked to run in the bg, then prepare to run in the 733 foreground, synchronously. */ 734 if (!async_exec && target_can_async_p ()) 735 { 736 /* Simulate synchronous execution. */ 737 async_disable_stdin (); 738 } 739 740 if (args != NULL) 741 { 742 if (strncmp (args, "-a", sizeof ("-a") - 1) == 0) 743 { 744 all_threads = 1; 745 args += sizeof ("-a") - 1; 746 if (*args == '\0') 747 args = NULL; 748 } 749 } 750 751 if (!non_stop && all_threads) 752 error (_("`-a' is meaningless in all-stop mode.")); 753 754 if (args != NULL && all_threads) 755 error (_("Can't resume all threads and specify " 756 "proceed count simultaneously.")); 757 758 /* If we have an argument left, set proceed count of breakpoint we 759 stopped at. */ 760 if (args != NULL) 761 { 762 bpstat bs = NULL; 763 int num, stat; 764 int stopped = 0; 765 struct thread_info *tp; 766 767 if (non_stop) 768 tp = find_thread_ptid (inferior_ptid); 769 else 770 { 771 ptid_t last_ptid; 772 struct target_waitstatus ws; 773 774 get_last_target_status (&last_ptid, &ws); 775 tp = find_thread_ptid (last_ptid); 776 } 777 if (tp != NULL) 778 bs = tp->control.stop_bpstat; 779 780 while ((stat = bpstat_num (&bs, &num)) != 0) 781 if (stat > 0) 782 { 783 set_ignore_count (num, 784 parse_and_eval_long (args) - 1, 785 from_tty); 786 /* set_ignore_count prints a message ending with a period. 787 So print two spaces before "Continuing.". */ 788 if (from_tty) 789 printf_filtered (" "); 790 stopped = 1; 791 } 792 793 if (!stopped && from_tty) 794 { 795 printf_filtered 796 ("Not stopped at any breakpoint; argument ignored.\n"); 797 } 798 } 799 800 if (from_tty) 801 printf_filtered (_("Continuing.\n")); 802 803 continue_1 (all_threads); 804 } 805 806 /* Record the starting point of a "step" or "next" command. */ 807 808 static void 809 set_step_frame (void) 810 { 811 struct symtab_and_line sal; 812 813 find_frame_sal (get_current_frame (), &sal); 814 set_step_info (get_current_frame (), sal); 815 } 816 817 /* Step until outside of current statement. */ 818 819 static void 820 step_command (char *count_string, int from_tty) 821 { 822 step_1 (0, 0, count_string); 823 } 824 825 /* Likewise, but skip over subroutine calls as if single instructions. */ 826 827 static void 828 next_command (char *count_string, int from_tty) 829 { 830 step_1 (1, 0, count_string); 831 } 832 833 /* Likewise, but step only one instruction. */ 834 835 void 836 stepi_command (char *count_string, int from_tty) 837 { 838 step_1 (0, 1, count_string); 839 } 840 841 void 842 nexti_command (char *count_string, int from_tty) 843 { 844 step_1 (1, 1, count_string); 845 } 846 847 void 848 delete_longjmp_breakpoint_cleanup (void *arg) 849 { 850 int thread = * (int *) arg; 851 delete_longjmp_breakpoint (thread); 852 } 853 854 static void 855 step_1 (int skip_subroutines, int single_inst, char *count_string) 856 { 857 int count = 1; 858 struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); 859 int async_exec = 0; 860 int thread = -1; 861 862 ERROR_NO_INFERIOR; 863 ensure_not_tfind_mode (); 864 ensure_valid_thread (); 865 ensure_not_running (); 866 867 if (count_string) 868 async_exec = strip_bg_char (&count_string); 869 870 /* If we get a request for running in the bg but the target 871 doesn't support it, error out. */ 872 if (async_exec && !target_can_async_p ()) 873 error (_("Asynchronous execution not supported on this target.")); 874 875 /* If we don't get a request of running in the bg, then we need 876 to simulate synchronous (fg) execution. */ 877 if (!async_exec && target_can_async_p ()) 878 { 879 /* Simulate synchronous execution. */ 880 async_disable_stdin (); 881 } 882 883 count = count_string ? parse_and_eval_long (count_string) : 1; 884 885 if (!single_inst || skip_subroutines) /* Leave si command alone. */ 886 { 887 struct thread_info *tp = inferior_thread (); 888 889 if (in_thread_list (inferior_ptid)) 890 thread = pid_to_thread_id (inferior_ptid); 891 892 set_longjmp_breakpoint (tp, get_frame_id (get_current_frame ())); 893 894 make_cleanup (delete_longjmp_breakpoint_cleanup, &thread); 895 } 896 897 /* In synchronous case, all is well; each step_once call will step once. */ 898 if (!target_can_async_p ()) 899 { 900 for (; count > 0; count--) 901 { 902 step_once (skip_subroutines, single_inst, count, thread); 903 904 if (!target_has_execution) 905 break; 906 else 907 { 908 struct thread_info *tp = inferior_thread (); 909 910 if (!tp->control.stop_step || !tp->step_multi) 911 { 912 /* If we stopped for some reason that is not stepping 913 there are no further steps to make. */ 914 tp->step_multi = 0; 915 break; 916 } 917 } 918 } 919 920 do_cleanups (cleanups); 921 } 922 else 923 { 924 /* In the case of an asynchronous target things get complicated; 925 do only one step for now, before returning control to the 926 event loop. Let the continuation figure out how many other 927 steps we need to do, and handle them one at the time, through 928 step_once. */ 929 step_once (skip_subroutines, single_inst, count, thread); 930 931 /* We are running, and the continuation is installed. It will 932 disable the longjmp breakpoint as appropriate. */ 933 discard_cleanups (cleanups); 934 } 935 } 936 937 struct step_1_continuation_args 938 { 939 int count; 940 int skip_subroutines; 941 int single_inst; 942 int thread; 943 }; 944 945 /* Called after we are done with one step operation, to check whether 946 we need to step again, before we print the prompt and return control 947 to the user. If count is > 1, we will need to do one more call to 948 proceed(), via step_once(). Basically it is like step_once and 949 step_1_continuation are co-recursive. */ 950 static void 951 step_1_continuation (void *args, int err) 952 { 953 struct step_1_continuation_args *a = args; 954 955 if (target_has_execution) 956 { 957 struct thread_info *tp; 958 959 tp = inferior_thread (); 960 if (!err 961 && tp->step_multi && tp->control.stop_step) 962 { 963 /* There are more steps to make, and we did stop due to 964 ending a stepping range. Do another step. */ 965 step_once (a->skip_subroutines, a->single_inst, 966 a->count - 1, a->thread); 967 return; 968 } 969 tp->step_multi = 0; 970 } 971 972 /* We either hit an error, or stopped for some reason that is 973 not stepping, or there are no further steps to make. 974 Cleanup. */ 975 if (!a->single_inst || a->skip_subroutines) 976 delete_longjmp_breakpoint (a->thread); 977 } 978 979 /* Do just one step operation. This is useful to implement the 'step 980 n' kind of commands. In case of asynchronous targets, we will have 981 to set up a continuation to be done after the target stops (after 982 this one step). For synch targets, the caller handles further 983 stepping. */ 984 985 static void 986 step_once (int skip_subroutines, int single_inst, int count, int thread) 987 { 988 struct frame_info *frame = get_current_frame (); 989 990 if (count > 0) 991 { 992 /* Don't assume THREAD is a valid thread id. It is set to -1 if 993 the longjmp breakpoint was not required. Use the 994 INFERIOR_PTID thread instead, which is the same thread when 995 THREAD is set. */ 996 struct thread_info *tp = inferior_thread (); 997 998 clear_proceed_status (); 999 set_step_frame (); 1000 1001 if (!single_inst) 1002 { 1003 CORE_ADDR pc; 1004 1005 /* Step at an inlined function behaves like "down". */ 1006 if (!skip_subroutines && !single_inst 1007 && inline_skipped_frames (inferior_ptid)) 1008 { 1009 ptid_t resume_ptid; 1010 1011 /* Pretend that we've ran. */ 1012 resume_ptid = user_visible_resume_ptid (1); 1013 set_running (resume_ptid, 1); 1014 1015 step_into_inline_frame (inferior_ptid); 1016 if (count > 1) 1017 step_once (skip_subroutines, single_inst, count - 1, thread); 1018 else 1019 { 1020 /* Pretend that we've stopped. */ 1021 normal_stop (); 1022 1023 if (target_can_async_p ()) 1024 inferior_event_handler (INF_EXEC_COMPLETE, NULL); 1025 } 1026 return; 1027 } 1028 1029 pc = get_frame_pc (frame); 1030 find_pc_line_pc_range (pc, 1031 &tp->control.step_range_start, 1032 &tp->control.step_range_end); 1033 1034 /* If we have no line info, switch to stepi mode. */ 1035 if (tp->control.step_range_end == 0 && step_stop_if_no_debug) 1036 tp->control.step_range_start = tp->control.step_range_end = 1; 1037 else if (tp->control.step_range_end == 0) 1038 { 1039 char *name; 1040 1041 if (find_pc_partial_function (pc, &name, 1042 &tp->control.step_range_start, 1043 &tp->control.step_range_end) == 0) 1044 error (_("Cannot find bounds of current function")); 1045 1046 target_terminal_ours (); 1047 printf_filtered (_("Single stepping until exit from function %s," 1048 "\nwhich has no line number information.\n"), 1049 name); 1050 } 1051 } 1052 else 1053 { 1054 /* Say we are stepping, but stop after one insn whatever it does. */ 1055 tp->control.step_range_start = tp->control.step_range_end = 1; 1056 if (!skip_subroutines) 1057 /* It is stepi. 1058 Don't step over function calls, not even to functions lacking 1059 line numbers. */ 1060 tp->control.step_over_calls = STEP_OVER_NONE; 1061 } 1062 1063 if (skip_subroutines) 1064 tp->control.step_over_calls = STEP_OVER_ALL; 1065 1066 tp->step_multi = (count > 1); 1067 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1); 1068 1069 /* For async targets, register a continuation to do any 1070 additional steps. For sync targets, the caller will handle 1071 further stepping. */ 1072 if (target_can_async_p ()) 1073 { 1074 struct step_1_continuation_args *args; 1075 1076 args = xmalloc (sizeof (*args)); 1077 args->skip_subroutines = skip_subroutines; 1078 args->single_inst = single_inst; 1079 args->count = count; 1080 args->thread = thread; 1081 1082 add_intermediate_continuation (tp, step_1_continuation, args, xfree); 1083 } 1084 } 1085 } 1086 1087 1088 /* Continue program at specified address. */ 1089 1090 static void 1091 jump_command (char *arg, int from_tty) 1092 { 1093 struct gdbarch *gdbarch = get_current_arch (); 1094 CORE_ADDR addr; 1095 struct symtabs_and_lines sals; 1096 struct symtab_and_line sal; 1097 struct symbol *fn; 1098 struct symbol *sfn; 1099 int async_exec = 0; 1100 1101 ERROR_NO_INFERIOR; 1102 ensure_not_tfind_mode (); 1103 ensure_valid_thread (); 1104 ensure_not_running (); 1105 1106 /* Find out whether we must run in the background. */ 1107 if (arg != NULL) 1108 async_exec = strip_bg_char (&arg); 1109 1110 /* If we must run in the background, but the target can't do it, 1111 error out. */ 1112 if (async_exec && !target_can_async_p ()) 1113 error (_("Asynchronous execution not supported on this target.")); 1114 1115 if (!arg) 1116 error_no_arg (_("starting address")); 1117 1118 sals = decode_line_spec_1 (arg, DECODE_LINE_FUNFIRSTLINE); 1119 if (sals.nelts != 1) 1120 { 1121 error (_("Unreasonable jump request")); 1122 } 1123 1124 sal = sals.sals[0]; 1125 xfree (sals.sals); 1126 1127 if (sal.symtab == 0 && sal.pc == 0) 1128 error (_("No source file has been specified.")); 1129 1130 resolve_sal_pc (&sal); /* May error out. */ 1131 1132 /* See if we are trying to jump to another function. */ 1133 fn = get_frame_function (get_current_frame ()); 1134 sfn = find_pc_function (sal.pc); 1135 if (fn != NULL && sfn != fn) 1136 { 1137 if (!query (_("Line %d is not in `%s'. Jump anyway? "), sal.line, 1138 SYMBOL_PRINT_NAME (fn))) 1139 { 1140 error (_("Not confirmed.")); 1141 /* NOTREACHED */ 1142 } 1143 } 1144 1145 if (sfn != NULL) 1146 { 1147 fixup_symbol_section (sfn, 0); 1148 if (section_is_overlay (SYMBOL_OBJ_SECTION (sfn)) && 1149 !section_is_mapped (SYMBOL_OBJ_SECTION (sfn))) 1150 { 1151 if (!query (_("WARNING!!! Destination is in " 1152 "unmapped overlay! Jump anyway? "))) 1153 { 1154 error (_("Not confirmed.")); 1155 /* NOTREACHED */ 1156 } 1157 } 1158 } 1159 1160 addr = sal.pc; 1161 1162 if (from_tty) 1163 { 1164 printf_filtered (_("Continuing at ")); 1165 fputs_filtered (paddress (gdbarch, addr), gdb_stdout); 1166 printf_filtered (".\n"); 1167 } 1168 1169 /* If we are not asked to run in the bg, then prepare to run in the 1170 foreground, synchronously. */ 1171 if (!async_exec && target_can_async_p ()) 1172 { 1173 /* Simulate synchronous execution. */ 1174 async_disable_stdin (); 1175 } 1176 1177 clear_proceed_status (); 1178 proceed (addr, TARGET_SIGNAL_0, 0); 1179 } 1180 1181 1182 /* Go to line or address in current procedure. */ 1183 static void 1184 go_command (char *line_no, int from_tty) 1185 { 1186 if (line_no == (char *) NULL || !*line_no) 1187 printf_filtered (_("Usage: go <location>\n")); 1188 else 1189 { 1190 tbreak_command (line_no, from_tty); 1191 jump_command (line_no, from_tty); 1192 } 1193 } 1194 1195 1196 /* Continue program giving it specified signal. */ 1197 1198 static void 1199 signal_command (char *signum_exp, int from_tty) 1200 { 1201 enum target_signal oursig; 1202 int async_exec = 0; 1203 1204 dont_repeat (); /* Too dangerous. */ 1205 ERROR_NO_INFERIOR; 1206 ensure_not_tfind_mode (); 1207 ensure_valid_thread (); 1208 ensure_not_running (); 1209 1210 /* Find out whether we must run in the background. */ 1211 if (signum_exp != NULL) 1212 async_exec = strip_bg_char (&signum_exp); 1213 1214 /* If we must run in the background, but the target can't do it, 1215 error out. */ 1216 if (async_exec && !target_can_async_p ()) 1217 error (_("Asynchronous execution not supported on this target.")); 1218 1219 /* If we are not asked to run in the bg, then prepare to run in the 1220 foreground, synchronously. */ 1221 if (!async_exec && target_can_async_p ()) 1222 { 1223 /* Simulate synchronous execution. */ 1224 async_disable_stdin (); 1225 } 1226 1227 if (!signum_exp) 1228 error_no_arg (_("signal number")); 1229 1230 /* It would be even slicker to make signal names be valid expressions, 1231 (the type could be "enum $signal" or some such), then the user could 1232 assign them to convenience variables. */ 1233 oursig = target_signal_from_name (signum_exp); 1234 1235 if (oursig == TARGET_SIGNAL_UNKNOWN) 1236 { 1237 /* No, try numeric. */ 1238 int num = parse_and_eval_long (signum_exp); 1239 1240 if (num == 0) 1241 oursig = TARGET_SIGNAL_0; 1242 else 1243 oursig = target_signal_from_command (num); 1244 } 1245 1246 if (from_tty) 1247 { 1248 if (oursig == TARGET_SIGNAL_0) 1249 printf_filtered (_("Continuing with no signal.\n")); 1250 else 1251 printf_filtered (_("Continuing with signal %s.\n"), 1252 target_signal_to_name (oursig)); 1253 } 1254 1255 clear_proceed_status (); 1256 proceed ((CORE_ADDR) -1, oursig, 0); 1257 } 1258 1259 /* Continuation args to be passed to the "until" command 1260 continuation. */ 1261 struct until_next_continuation_args 1262 { 1263 /* The thread that was current when the command was executed. */ 1264 int thread; 1265 }; 1266 1267 /* A continuation callback for until_next_command. */ 1268 1269 static void 1270 until_next_continuation (void *arg, int err) 1271 { 1272 struct until_next_continuation_args *a = arg; 1273 1274 delete_longjmp_breakpoint (a->thread); 1275 } 1276 1277 /* Proceed until we reach a different source line with pc greater than 1278 our current one or exit the function. We skip calls in both cases. 1279 1280 Note that eventually this command should probably be changed so 1281 that only source lines are printed out when we hit the breakpoint 1282 we set. This may involve changes to wait_for_inferior and the 1283 proceed status code. */ 1284 1285 static void 1286 until_next_command (int from_tty) 1287 { 1288 struct frame_info *frame; 1289 CORE_ADDR pc; 1290 struct symbol *func; 1291 struct symtab_and_line sal; 1292 struct thread_info *tp = inferior_thread (); 1293 int thread = tp->num; 1294 struct cleanup *old_chain; 1295 1296 clear_proceed_status (); 1297 set_step_frame (); 1298 1299 frame = get_current_frame (); 1300 1301 /* Step until either exited from this function or greater 1302 than the current line (if in symbolic section) or pc (if 1303 not). */ 1304 1305 pc = get_frame_pc (frame); 1306 func = find_pc_function (pc); 1307 1308 if (!func) 1309 { 1310 struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (pc); 1311 1312 if (msymbol == NULL) 1313 error (_("Execution is not within a known function.")); 1314 1315 tp->control.step_range_start = SYMBOL_VALUE_ADDRESS (msymbol); 1316 tp->control.step_range_end = pc; 1317 } 1318 else 1319 { 1320 sal = find_pc_line (pc, 0); 1321 1322 tp->control.step_range_start = BLOCK_START (SYMBOL_BLOCK_VALUE (func)); 1323 tp->control.step_range_end = sal.end; 1324 } 1325 1326 tp->control.step_over_calls = STEP_OVER_ALL; 1327 1328 tp->step_multi = 0; /* Only one call to proceed */ 1329 1330 set_longjmp_breakpoint (tp, get_frame_id (frame)); 1331 old_chain = make_cleanup (delete_longjmp_breakpoint_cleanup, &thread); 1332 1333 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1); 1334 1335 if (target_can_async_p () && is_running (inferior_ptid)) 1336 { 1337 struct until_next_continuation_args *cont_args; 1338 1339 discard_cleanups (old_chain); 1340 cont_args = XNEW (struct until_next_continuation_args); 1341 cont_args->thread = inferior_thread ()->num; 1342 1343 add_continuation (tp, until_next_continuation, cont_args, xfree); 1344 } 1345 else 1346 do_cleanups (old_chain); 1347 } 1348 1349 static void 1350 until_command (char *arg, int from_tty) 1351 { 1352 int async_exec = 0; 1353 1354 ERROR_NO_INFERIOR; 1355 ensure_not_tfind_mode (); 1356 ensure_valid_thread (); 1357 ensure_not_running (); 1358 1359 /* Find out whether we must run in the background. */ 1360 if (arg != NULL) 1361 async_exec = strip_bg_char (&arg); 1362 1363 /* If we must run in the background, but the target can't do it, 1364 error out. */ 1365 if (async_exec && !target_can_async_p ()) 1366 error (_("Asynchronous execution not supported on this target.")); 1367 1368 /* If we are not asked to run in the bg, then prepare to run in the 1369 foreground, synchronously. */ 1370 if (!async_exec && target_can_async_p ()) 1371 { 1372 /* Simulate synchronous execution. */ 1373 async_disable_stdin (); 1374 } 1375 1376 if (arg) 1377 until_break_command (arg, from_tty, 0); 1378 else 1379 until_next_command (from_tty); 1380 } 1381 1382 static void 1383 advance_command (char *arg, int from_tty) 1384 { 1385 int async_exec = 0; 1386 1387 ERROR_NO_INFERIOR; 1388 ensure_not_tfind_mode (); 1389 ensure_valid_thread (); 1390 ensure_not_running (); 1391 1392 if (arg == NULL) 1393 error_no_arg (_("a location")); 1394 1395 /* Find out whether we must run in the background. */ 1396 if (arg != NULL) 1397 async_exec = strip_bg_char (&arg); 1398 1399 /* If we must run in the background, but the target can't do it, 1400 error out. */ 1401 if (async_exec && !target_can_async_p ()) 1402 error (_("Asynchronous execution not supported on this target.")); 1403 1404 /* If we are not asked to run in the bg, then prepare to run in the 1405 foreground, synchronously. */ 1406 if (!async_exec && target_can_async_p ()) 1407 { 1408 /* Simulate synchronous execution. */ 1409 async_disable_stdin (); 1410 } 1411 1412 until_break_command (arg, from_tty, 1); 1413 } 1414 1415 /* Return the value of the result of a function at the end of a 'finish' 1416 command/BP. */ 1417 1418 struct value * 1419 get_return_value (struct type *func_type, struct type *value_type) 1420 { 1421 struct regcache *stop_regs = stop_registers; 1422 struct gdbarch *gdbarch; 1423 struct value *value; 1424 struct ui_out *uiout = current_uiout; 1425 struct cleanup *cleanup = make_cleanup (null_cleanup, NULL); 1426 1427 /* If stop_registers were not saved, use the current registers. */ 1428 if (!stop_regs) 1429 { 1430 stop_regs = regcache_dup (get_current_regcache ()); 1431 cleanup = make_cleanup_regcache_xfree (stop_regs); 1432 } 1433 1434 gdbarch = get_regcache_arch (stop_regs); 1435 1436 CHECK_TYPEDEF (value_type); 1437 gdb_assert (TYPE_CODE (value_type) != TYPE_CODE_VOID); 1438 1439 /* FIXME: 2003-09-27: When returning from a nested inferior function 1440 call, it's possible (with no help from the architecture vector) 1441 to locate and return/print a "struct return" value. This is just 1442 a more complicated case of what is already being done in the 1443 inferior function call code. In fact, when inferior function 1444 calls are made async, this will likely be made the norm. */ 1445 1446 switch (gdbarch_return_value (gdbarch, func_type, value_type, 1447 NULL, NULL, NULL)) 1448 { 1449 case RETURN_VALUE_REGISTER_CONVENTION: 1450 case RETURN_VALUE_ABI_RETURNS_ADDRESS: 1451 case RETURN_VALUE_ABI_PRESERVES_ADDRESS: 1452 value = allocate_value (value_type); 1453 gdbarch_return_value (gdbarch, func_type, value_type, stop_regs, 1454 value_contents_raw (value), NULL); 1455 break; 1456 case RETURN_VALUE_STRUCT_CONVENTION: 1457 value = NULL; 1458 break; 1459 default: 1460 internal_error (__FILE__, __LINE__, _("bad switch")); 1461 } 1462 1463 do_cleanups (cleanup); 1464 1465 return value; 1466 } 1467 1468 /* Print the result of a function at the end of a 'finish' command. */ 1469 1470 static void 1471 print_return_value (struct type *func_type, struct type *value_type) 1472 { 1473 struct value *value = get_return_value (func_type, value_type); 1474 struct cleanup *old_chain; 1475 struct ui_stream *stb; 1476 struct ui_out *uiout = current_uiout; 1477 1478 if (value) 1479 { 1480 struct value_print_options opts; 1481 1482 /* Print it. */ 1483 stb = ui_out_stream_new (uiout); 1484 old_chain = make_cleanup_ui_out_stream_delete (stb); 1485 ui_out_text (uiout, "Value returned is "); 1486 ui_out_field_fmt (uiout, "gdb-result-var", "$%d", 1487 record_latest_value (value)); 1488 ui_out_text (uiout, " = "); 1489 get_raw_print_options (&opts); 1490 value_print (value, stb->stream, &opts); 1491 ui_out_field_stream (uiout, "return-value", stb); 1492 ui_out_text (uiout, "\n"); 1493 do_cleanups (old_chain); 1494 } 1495 else 1496 { 1497 ui_out_text (uiout, "Value returned has type: "); 1498 ui_out_field_string (uiout, "return-type", TYPE_NAME (value_type)); 1499 ui_out_text (uiout, "."); 1500 ui_out_text (uiout, " Cannot determine contents\n"); 1501 } 1502 } 1503 1504 /* Stuff that needs to be done by the finish command after the target 1505 has stopped. In asynchronous mode, we wait for the target to stop 1506 in the call to poll or select in the event loop, so it is 1507 impossible to do all the stuff as part of the finish_command 1508 function itself. The only chance we have to complete this command 1509 is in fetch_inferior_event, which is called by the event loop as 1510 soon as it detects that the target has stopped. */ 1511 1512 struct finish_command_continuation_args 1513 { 1514 /* The thread that as current when the command was executed. */ 1515 int thread; 1516 struct breakpoint *breakpoint; 1517 struct symbol *function; 1518 }; 1519 1520 static void 1521 finish_command_continuation (void *arg, int err) 1522 { 1523 struct finish_command_continuation_args *a = arg; 1524 1525 if (!err) 1526 { 1527 struct thread_info *tp = NULL; 1528 bpstat bs = NULL; 1529 1530 if (!ptid_equal (inferior_ptid, null_ptid) 1531 && target_has_execution 1532 && is_stopped (inferior_ptid)) 1533 { 1534 tp = inferior_thread (); 1535 bs = tp->control.stop_bpstat; 1536 } 1537 1538 if (bpstat_find_breakpoint (bs, a->breakpoint) != NULL 1539 && a->function != NULL) 1540 { 1541 struct type *value_type; 1542 1543 value_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (a->function)); 1544 if (!value_type) 1545 internal_error (__FILE__, __LINE__, 1546 _("finish_command: function has no target type")); 1547 1548 if (TYPE_CODE (value_type) != TYPE_CODE_VOID) 1549 { 1550 volatile struct gdb_exception ex; 1551 1552 TRY_CATCH (ex, RETURN_MASK_ALL) 1553 { 1554 /* print_return_value can throw an exception in some 1555 circumstances. We need to catch this so that we still 1556 delete the breakpoint. */ 1557 print_return_value (SYMBOL_TYPE (a->function), value_type); 1558 } 1559 if (ex.reason < 0) 1560 exception_print (gdb_stdout, ex); 1561 } 1562 } 1563 1564 /* We suppress normal call of normal_stop observer and do it 1565 here so that the *stopped notification includes the return 1566 value. */ 1567 if (bs != NULL && tp->control.proceed_to_finish) 1568 observer_notify_normal_stop (bs, 1 /* print frame */); 1569 } 1570 1571 delete_breakpoint (a->breakpoint); 1572 delete_longjmp_breakpoint (a->thread); 1573 } 1574 1575 static void 1576 finish_command_continuation_free_arg (void *arg) 1577 { 1578 xfree (arg); 1579 } 1580 1581 /* finish_backward -- helper function for finish_command. */ 1582 1583 static void 1584 finish_backward (struct symbol *function) 1585 { 1586 struct symtab_and_line sal; 1587 struct thread_info *tp = inferior_thread (); 1588 CORE_ADDR pc; 1589 CORE_ADDR func_addr; 1590 1591 pc = get_frame_pc (get_current_frame ()); 1592 1593 if (find_pc_partial_function (pc, NULL, &func_addr, NULL) == 0) 1594 internal_error (__FILE__, __LINE__, 1595 _("Finish: couldn't find function.")); 1596 1597 sal = find_pc_line (func_addr, 0); 1598 1599 tp->control.proceed_to_finish = 1; 1600 /* Special case: if we're sitting at the function entry point, 1601 then all we need to do is take a reverse singlestep. We 1602 don't need to set a breakpoint, and indeed it would do us 1603 no good to do so. 1604 1605 Note that this can only happen at frame #0, since there's 1606 no way that a function up the stack can have a return address 1607 that's equal to its entry point. */ 1608 1609 if (sal.pc != pc) 1610 { 1611 struct frame_info *frame = get_selected_frame (NULL); 1612 struct gdbarch *gdbarch = get_frame_arch (frame); 1613 struct symtab_and_line sr_sal; 1614 1615 /* Set a step-resume at the function's entry point. Once that's 1616 hit, we'll do one more step backwards. */ 1617 init_sal (&sr_sal); 1618 sr_sal.pc = sal.pc; 1619 sr_sal.pspace = get_frame_program_space (frame); 1620 insert_step_resume_breakpoint_at_sal (gdbarch, 1621 sr_sal, null_frame_id); 1622 1623 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0); 1624 } 1625 else 1626 { 1627 /* We're almost there -- we just need to back up by one more 1628 single-step. */ 1629 tp->control.step_range_start = tp->control.step_range_end = 1; 1630 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1); 1631 } 1632 } 1633 1634 /* finish_forward -- helper function for finish_command. */ 1635 1636 static void 1637 finish_forward (struct symbol *function, struct frame_info *frame) 1638 { 1639 struct frame_id frame_id = get_frame_id (frame); 1640 struct gdbarch *gdbarch = get_frame_arch (frame); 1641 struct symtab_and_line sal; 1642 struct thread_info *tp = inferior_thread (); 1643 struct breakpoint *breakpoint; 1644 struct cleanup *old_chain; 1645 struct finish_command_continuation_args *cargs; 1646 int thread = tp->num; 1647 1648 sal = find_pc_line (get_frame_pc (frame), 0); 1649 sal.pc = get_frame_pc (frame); 1650 1651 breakpoint = set_momentary_breakpoint (gdbarch, sal, 1652 get_stack_frame_id (frame), 1653 bp_finish); 1654 1655 old_chain = make_cleanup_delete_breakpoint (breakpoint); 1656 1657 set_longjmp_breakpoint (tp, frame_id); 1658 make_cleanup (delete_longjmp_breakpoint_cleanup, &thread); 1659 1660 /* We want stop_registers, please... */ 1661 tp->control.proceed_to_finish = 1; 1662 cargs = xmalloc (sizeof (*cargs)); 1663 1664 cargs->thread = thread; 1665 cargs->breakpoint = breakpoint; 1666 cargs->function = function; 1667 add_continuation (tp, finish_command_continuation, cargs, 1668 finish_command_continuation_free_arg); 1669 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0); 1670 1671 discard_cleanups (old_chain); 1672 if (!target_can_async_p ()) 1673 do_all_continuations (0); 1674 } 1675 1676 /* "finish": Set a temporary breakpoint at the place the selected 1677 frame will return to, then continue. */ 1678 1679 static void 1680 finish_command (char *arg, int from_tty) 1681 { 1682 struct frame_info *frame; 1683 struct symbol *function; 1684 1685 int async_exec = 0; 1686 1687 ERROR_NO_INFERIOR; 1688 ensure_not_tfind_mode (); 1689 ensure_valid_thread (); 1690 ensure_not_running (); 1691 1692 /* Find out whether we must run in the background. */ 1693 if (arg != NULL) 1694 async_exec = strip_bg_char (&arg); 1695 1696 /* If we must run in the background, but the target can't do it, 1697 error out. */ 1698 if (async_exec && !target_can_async_p ()) 1699 error (_("Asynchronous execution not supported on this target.")); 1700 1701 /* If we are not asked to run in the bg, then prepare to run in the 1702 foreground, synchronously. */ 1703 if (!async_exec && target_can_async_p ()) 1704 { 1705 /* Simulate synchronous execution. */ 1706 async_disable_stdin (); 1707 } 1708 1709 if (arg) 1710 error (_("The \"finish\" command does not take any arguments.")); 1711 1712 frame = get_prev_frame (get_selected_frame (_("No selected frame."))); 1713 if (frame == 0) 1714 error (_("\"finish\" not meaningful in the outermost frame.")); 1715 1716 clear_proceed_status (); 1717 1718 /* Finishing from an inline frame is completely different. We don't 1719 try to show the "return value" - no way to locate it. So we do 1720 not need a completion. */ 1721 if (get_frame_type (get_selected_frame (_("No selected frame."))) 1722 == INLINE_FRAME) 1723 { 1724 /* Claim we are stepping in the calling frame. An empty step 1725 range means that we will stop once we aren't in a function 1726 called by that frame. We don't use the magic "1" value for 1727 step_range_end, because then infrun will think this is nexti, 1728 and not step over the rest of this inlined function call. */ 1729 struct thread_info *tp = inferior_thread (); 1730 struct symtab_and_line empty_sal; 1731 1732 init_sal (&empty_sal); 1733 set_step_info (frame, empty_sal); 1734 tp->control.step_range_start = get_frame_pc (frame); 1735 tp->control.step_range_end = tp->control.step_range_start; 1736 tp->control.step_over_calls = STEP_OVER_ALL; 1737 1738 /* Print info on the selected frame, including level number but not 1739 source. */ 1740 if (from_tty) 1741 { 1742 printf_filtered (_("Run till exit from ")); 1743 print_stack_frame (get_selected_frame (NULL), 1, LOCATION); 1744 } 1745 1746 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1); 1747 return; 1748 } 1749 1750 /* Find the function we will return from. */ 1751 1752 function = find_pc_function (get_frame_pc (get_selected_frame (NULL))); 1753 1754 /* Print info on the selected frame, including level number but not 1755 source. */ 1756 if (from_tty) 1757 { 1758 if (execution_direction == EXEC_REVERSE) 1759 printf_filtered (_("Run back to call of ")); 1760 else 1761 printf_filtered (_("Run till exit from ")); 1762 1763 print_stack_frame (get_selected_frame (NULL), 1, LOCATION); 1764 } 1765 1766 if (execution_direction == EXEC_REVERSE) 1767 finish_backward (function); 1768 else 1769 finish_forward (function, frame); 1770 } 1771 1772 1773 static void 1774 program_info (char *args, int from_tty) 1775 { 1776 bpstat bs; 1777 int num, stat; 1778 struct thread_info *tp; 1779 ptid_t ptid; 1780 1781 if (!target_has_execution) 1782 { 1783 printf_filtered (_("The program being debugged is not being run.\n")); 1784 return; 1785 } 1786 1787 if (non_stop) 1788 ptid = inferior_ptid; 1789 else 1790 { 1791 struct target_waitstatus ws; 1792 1793 get_last_target_status (&ptid, &ws); 1794 } 1795 1796 if (ptid_equal (ptid, null_ptid) || is_exited (ptid)) 1797 error (_("Invalid selected thread.")); 1798 else if (is_running (ptid)) 1799 error (_("Selected thread is running.")); 1800 1801 tp = find_thread_ptid (ptid); 1802 bs = tp->control.stop_bpstat; 1803 stat = bpstat_num (&bs, &num); 1804 1805 target_files_info (); 1806 printf_filtered (_("Program stopped at %s.\n"), 1807 paddress (target_gdbarch, stop_pc)); 1808 if (tp->control.stop_step) 1809 printf_filtered (_("It stopped after being stepped.\n")); 1810 else if (stat != 0) 1811 { 1812 /* There may be several breakpoints in the same place, so this 1813 isn't as strange as it seems. */ 1814 while (stat != 0) 1815 { 1816 if (stat < 0) 1817 { 1818 printf_filtered (_("It stopped at a breakpoint " 1819 "that has since been deleted.\n")); 1820 } 1821 else 1822 printf_filtered (_("It stopped at breakpoint %d.\n"), num); 1823 stat = bpstat_num (&bs, &num); 1824 } 1825 } 1826 else if (tp->suspend.stop_signal != TARGET_SIGNAL_0) 1827 { 1828 printf_filtered (_("It stopped with signal %s, %s.\n"), 1829 target_signal_to_name (tp->suspend.stop_signal), 1830 target_signal_to_string (tp->suspend.stop_signal)); 1831 } 1832 1833 if (!from_tty) 1834 { 1835 printf_filtered (_("Type \"info stack\" or \"info " 1836 "registers\" for more information.\n")); 1837 } 1838 } 1839 1840 static void 1841 environment_info (char *var, int from_tty) 1842 { 1843 if (var) 1844 { 1845 char *val = get_in_environ (current_inferior ()->environment, var); 1846 1847 if (val) 1848 { 1849 puts_filtered (var); 1850 puts_filtered (" = "); 1851 puts_filtered (val); 1852 puts_filtered ("\n"); 1853 } 1854 else 1855 { 1856 puts_filtered ("Environment variable \""); 1857 puts_filtered (var); 1858 puts_filtered ("\" not defined.\n"); 1859 } 1860 } 1861 else 1862 { 1863 char **vector = environ_vector (current_inferior ()->environment); 1864 1865 while (*vector) 1866 { 1867 puts_filtered (*vector++); 1868 puts_filtered ("\n"); 1869 } 1870 } 1871 } 1872 1873 static void 1874 set_environment_command (char *arg, int from_tty) 1875 { 1876 char *p, *val, *var; 1877 int nullset = 0; 1878 1879 if (arg == 0) 1880 error_no_arg (_("environment variable and value")); 1881 1882 /* Find seperation between variable name and value. */ 1883 p = (char *) strchr (arg, '='); 1884 val = (char *) strchr (arg, ' '); 1885 1886 if (p != 0 && val != 0) 1887 { 1888 /* We have both a space and an equals. If the space is before the 1889 equals, walk forward over the spaces til we see a nonspace 1890 (possibly the equals). */ 1891 if (p > val) 1892 while (*val == ' ') 1893 val++; 1894 1895 /* Now if the = is after the char following the spaces, 1896 take the char following the spaces. */ 1897 if (p > val) 1898 p = val - 1; 1899 } 1900 else if (val != 0 && p == 0) 1901 p = val; 1902 1903 if (p == arg) 1904 error_no_arg (_("environment variable to set")); 1905 1906 if (p == 0 || p[1] == 0) 1907 { 1908 nullset = 1; 1909 if (p == 0) 1910 p = arg + strlen (arg); /* So that savestring below will work. */ 1911 } 1912 else 1913 { 1914 /* Not setting variable value to null. */ 1915 val = p + 1; 1916 while (*val == ' ' || *val == '\t') 1917 val++; 1918 } 1919 1920 while (p != arg && (p[-1] == ' ' || p[-1] == '\t')) 1921 p--; 1922 1923 var = savestring (arg, p - arg); 1924 if (nullset) 1925 { 1926 printf_filtered (_("Setting environment variable " 1927 "\"%s\" to null value.\n"), 1928 var); 1929 set_in_environ (current_inferior ()->environment, var, ""); 1930 } 1931 else 1932 set_in_environ (current_inferior ()->environment, var, val); 1933 xfree (var); 1934 } 1935 1936 static void 1937 unset_environment_command (char *var, int from_tty) 1938 { 1939 if (var == 0) 1940 { 1941 /* If there is no argument, delete all environment variables. 1942 Ask for confirmation if reading from the terminal. */ 1943 if (!from_tty || query (_("Delete all environment variables? "))) 1944 { 1945 free_environ (current_inferior ()->environment); 1946 current_inferior ()->environment = make_environ (); 1947 } 1948 } 1949 else 1950 unset_in_environ (current_inferior ()->environment, var); 1951 } 1952 1953 /* Handle the execution path (PATH variable). */ 1954 1955 static const char path_var_name[] = "PATH"; 1956 1957 static void 1958 path_info (char *args, int from_tty) 1959 { 1960 puts_filtered ("Executable and object file path: "); 1961 puts_filtered (get_in_environ (current_inferior ()->environment, 1962 path_var_name)); 1963 puts_filtered ("\n"); 1964 } 1965 1966 /* Add zero or more directories to the front of the execution path. */ 1967 1968 static void 1969 path_command (char *dirname, int from_tty) 1970 { 1971 char *exec_path; 1972 char *env; 1973 1974 dont_repeat (); 1975 env = get_in_environ (current_inferior ()->environment, path_var_name); 1976 /* Can be null if path is not set. */ 1977 if (!env) 1978 env = ""; 1979 exec_path = xstrdup (env); 1980 mod_path (dirname, &exec_path); 1981 set_in_environ (current_inferior ()->environment, path_var_name, exec_path); 1982 xfree (exec_path); 1983 if (from_tty) 1984 path_info ((char *) NULL, from_tty); 1985 } 1986 1987 1988 /* Print out the machine register regnum. If regnum is -1, print all 1989 registers (print_all == 1) or all non-float and non-vector 1990 registers (print_all == 0). 1991 1992 For most machines, having all_registers_info() print the 1993 register(s) one per line is good enough. If a different format is 1994 required, (eg, for MIPS or Pyramid 90x, which both have lots of 1995 regs), or there is an existing convention for showing all the 1996 registers, define the architecture method PRINT_REGISTERS_INFO to 1997 provide that format. */ 1998 1999 void 2000 default_print_registers_info (struct gdbarch *gdbarch, 2001 struct ui_file *file, 2002 struct frame_info *frame, 2003 int regnum, int print_all) 2004 { 2005 int i; 2006 const int numregs = gdbarch_num_regs (gdbarch) 2007 + gdbarch_num_pseudo_regs (gdbarch); 2008 2009 for (i = 0; i < numregs; i++) 2010 { 2011 struct type *regtype; 2012 struct value *val; 2013 2014 /* Decide between printing all regs, non-float / vector regs, or 2015 specific reg. */ 2016 if (regnum == -1) 2017 { 2018 if (print_all) 2019 { 2020 if (!gdbarch_register_reggroup_p (gdbarch, i, all_reggroup)) 2021 continue; 2022 } 2023 else 2024 { 2025 if (!gdbarch_register_reggroup_p (gdbarch, i, general_reggroup)) 2026 continue; 2027 } 2028 } 2029 else 2030 { 2031 if (i != regnum) 2032 continue; 2033 } 2034 2035 /* If the register name is empty, it is undefined for this 2036 processor, so don't display anything. */ 2037 if (gdbarch_register_name (gdbarch, i) == NULL 2038 || *(gdbarch_register_name (gdbarch, i)) == '\0') 2039 continue; 2040 2041 fputs_filtered (gdbarch_register_name (gdbarch, i), file); 2042 print_spaces_filtered (15 - strlen (gdbarch_register_name 2043 (gdbarch, i)), file); 2044 2045 regtype = register_type (gdbarch, i); 2046 val = allocate_value (regtype); 2047 2048 /* Get the data in raw format. */ 2049 if (! frame_register_read (frame, i, value_contents_raw (val))) 2050 { 2051 fprintf_filtered (file, "*value not available*\n"); 2052 continue; 2053 } 2054 2055 /* If virtual format is floating, print it that way, and in raw 2056 hex. */ 2057 if (TYPE_CODE (regtype) == TYPE_CODE_FLT 2058 || TYPE_CODE (regtype) == TYPE_CODE_DECFLOAT) 2059 { 2060 int j; 2061 struct value_print_options opts; 2062 const gdb_byte *valaddr = value_contents_for_printing (val); 2063 2064 get_user_print_options (&opts); 2065 opts.deref_ref = 1; 2066 2067 val_print (regtype, 2068 value_contents_for_printing (val), 2069 value_embedded_offset (val), 0, 2070 file, 0, val, &opts, current_language); 2071 2072 fprintf_filtered (file, "\t(raw 0x"); 2073 for (j = 0; j < register_size (gdbarch, i); j++) 2074 { 2075 int idx; 2076 2077 if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) 2078 idx = j; 2079 else 2080 idx = register_size (gdbarch, i) - 1 - j; 2081 fprintf_filtered (file, "%02x", (unsigned char) valaddr[idx]); 2082 } 2083 fprintf_filtered (file, ")"); 2084 } 2085 else 2086 { 2087 struct value_print_options opts; 2088 2089 /* Print the register in hex. */ 2090 get_formatted_print_options (&opts, 'x'); 2091 opts.deref_ref = 1; 2092 val_print (regtype, 2093 value_contents_for_printing (val), 2094 value_embedded_offset (val), 0, 2095 file, 0, val, &opts, current_language); 2096 /* If not a vector register, print it also according to its 2097 natural format. */ 2098 if (TYPE_VECTOR (regtype) == 0) 2099 { 2100 get_user_print_options (&opts); 2101 opts.deref_ref = 1; 2102 fprintf_filtered (file, "\t"); 2103 val_print (regtype, 2104 value_contents_for_printing (val), 2105 value_embedded_offset (val), 0, 2106 file, 0, val, &opts, current_language); 2107 } 2108 } 2109 2110 fprintf_filtered (file, "\n"); 2111 } 2112 } 2113 2114 void 2115 registers_info (char *addr_exp, int fpregs) 2116 { 2117 struct frame_info *frame; 2118 struct gdbarch *gdbarch; 2119 2120 if (!target_has_registers) 2121 error (_("The program has no registers now.")); 2122 frame = get_selected_frame (NULL); 2123 gdbarch = get_frame_arch (frame); 2124 2125 if (!addr_exp) 2126 { 2127 gdbarch_print_registers_info (gdbarch, gdb_stdout, 2128 frame, -1, fpregs); 2129 return; 2130 } 2131 2132 while (*addr_exp != '\0') 2133 { 2134 char *start; 2135 const char *end; 2136 2137 /* Keep skipping leading white space. */ 2138 if (isspace ((*addr_exp))) 2139 { 2140 addr_exp++; 2141 continue; 2142 } 2143 2144 /* Discard any leading ``$''. Check that there is something 2145 resembling a register following it. */ 2146 if (addr_exp[0] == '$') 2147 addr_exp++; 2148 if (isspace ((*addr_exp)) || (*addr_exp) == '\0') 2149 error (_("Missing register name")); 2150 2151 /* Find the start/end of this register name/num/group. */ 2152 start = addr_exp; 2153 while ((*addr_exp) != '\0' && !isspace ((*addr_exp))) 2154 addr_exp++; 2155 end = addr_exp; 2156 2157 /* Figure out what we've found and display it. */ 2158 2159 /* A register name? */ 2160 { 2161 int regnum = user_reg_map_name_to_regnum (gdbarch, start, end - start); 2162 2163 if (regnum >= 0) 2164 { 2165 /* User registers lie completely outside of the range of 2166 normal registers. Catch them early so that the target 2167 never sees them. */ 2168 if (regnum >= gdbarch_num_regs (gdbarch) 2169 + gdbarch_num_pseudo_regs (gdbarch)) 2170 { 2171 struct value_print_options opts; 2172 struct value *val = value_of_user_reg (regnum, frame); 2173 2174 printf_filtered ("%s: ", start); 2175 get_formatted_print_options (&opts, 'x'); 2176 val_print_scalar_formatted (check_typedef (value_type (val)), 2177 value_contents_for_printing (val), 2178 value_embedded_offset (val), 2179 val, 2180 &opts, 0, gdb_stdout); 2181 printf_filtered ("\n"); 2182 } 2183 else 2184 gdbarch_print_registers_info (gdbarch, gdb_stdout, 2185 frame, regnum, fpregs); 2186 continue; 2187 } 2188 } 2189 2190 /* A register group? */ 2191 { 2192 struct reggroup *group; 2193 2194 for (group = reggroup_next (gdbarch, NULL); 2195 group != NULL; 2196 group = reggroup_next (gdbarch, group)) 2197 { 2198 /* Don't bother with a length check. Should the user 2199 enter a short register group name, go with the first 2200 group that matches. */ 2201 if (strncmp (start, reggroup_name (group), end - start) == 0) 2202 break; 2203 } 2204 if (group != NULL) 2205 { 2206 int regnum; 2207 2208 for (regnum = 0; 2209 regnum < gdbarch_num_regs (gdbarch) 2210 + gdbarch_num_pseudo_regs (gdbarch); 2211 regnum++) 2212 { 2213 if (gdbarch_register_reggroup_p (gdbarch, regnum, group)) 2214 gdbarch_print_registers_info (gdbarch, 2215 gdb_stdout, frame, 2216 regnum, fpregs); 2217 } 2218 continue; 2219 } 2220 } 2221 2222 /* Nothing matched. */ 2223 error (_("Invalid register `%.*s'"), (int) (end - start), start); 2224 } 2225 } 2226 2227 void 2228 all_registers_info (char *addr_exp, int from_tty) 2229 { 2230 registers_info (addr_exp, 1); 2231 } 2232 2233 static void 2234 nofp_registers_info (char *addr_exp, int from_tty) 2235 { 2236 registers_info (addr_exp, 0); 2237 } 2238 2239 static void 2240 print_vector_info (struct ui_file *file, 2241 struct frame_info *frame, const char *args) 2242 { 2243 struct gdbarch *gdbarch = get_frame_arch (frame); 2244 2245 if (gdbarch_print_vector_info_p (gdbarch)) 2246 gdbarch_print_vector_info (gdbarch, file, frame, args); 2247 else 2248 { 2249 int regnum; 2250 int printed_something = 0; 2251 2252 for (regnum = 0; 2253 regnum < gdbarch_num_regs (gdbarch) 2254 + gdbarch_num_pseudo_regs (gdbarch); 2255 regnum++) 2256 { 2257 if (gdbarch_register_reggroup_p (gdbarch, regnum, vector_reggroup)) 2258 { 2259 printed_something = 1; 2260 gdbarch_print_registers_info (gdbarch, file, frame, regnum, 1); 2261 } 2262 } 2263 if (!printed_something) 2264 fprintf_filtered (file, "No vector information\n"); 2265 } 2266 } 2267 2268 static void 2269 vector_info (char *args, int from_tty) 2270 { 2271 if (!target_has_registers) 2272 error (_("The program has no registers now.")); 2273 2274 print_vector_info (gdb_stdout, get_selected_frame (NULL), args); 2275 } 2276 2277 /* Kill the inferior process. Make us have no inferior. */ 2278 2279 static void 2280 kill_command (char *arg, int from_tty) 2281 { 2282 /* FIXME: This should not really be inferior_ptid (or target_has_execution). 2283 It should be a distinct flag that indicates that a target is active, cuz 2284 some targets don't have processes! */ 2285 2286 if (ptid_equal (inferior_ptid, null_ptid)) 2287 error (_("The program is not being run.")); 2288 if (!query (_("Kill the program being debugged? "))) 2289 error (_("Not confirmed.")); 2290 target_kill (); 2291 2292 /* If we still have other inferiors to debug, then don't mess with 2293 with their threads. */ 2294 if (!have_inferiors ()) 2295 { 2296 init_thread_list (); /* Destroy thread info. */ 2297 2298 /* Killing off the inferior can leave us with a core file. If 2299 so, print the state we are left in. */ 2300 if (target_has_stack) 2301 { 2302 printf_filtered (_("In %s,\n"), target_longname); 2303 print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); 2304 } 2305 } 2306 bfd_cache_close_all (); 2307 } 2308 2309 /* Used in `attach&' command. ARG is a point to an integer 2310 representing a process id. Proceed threads of this process iff 2311 they stopped due to debugger request, and when they did, they 2312 reported a clean stop (TARGET_SIGNAL_0). Do not proceed threads 2313 that have been explicitly been told to stop. */ 2314 2315 static int 2316 proceed_after_attach_callback (struct thread_info *thread, 2317 void *arg) 2318 { 2319 int pid = * (int *) arg; 2320 2321 if (ptid_get_pid (thread->ptid) == pid 2322 && !is_exited (thread->ptid) 2323 && !is_executing (thread->ptid) 2324 && !thread->stop_requested 2325 && thread->suspend.stop_signal == TARGET_SIGNAL_0) 2326 { 2327 switch_to_thread (thread->ptid); 2328 clear_proceed_status (); 2329 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0); 2330 } 2331 2332 return 0; 2333 } 2334 2335 static void 2336 proceed_after_attach (int pid) 2337 { 2338 /* Don't error out if the current thread is running, because 2339 there may be other stopped threads. */ 2340 struct cleanup *old_chain; 2341 2342 /* Backup current thread and selected frame. */ 2343 old_chain = make_cleanup_restore_current_thread (); 2344 2345 iterate_over_threads (proceed_after_attach_callback, &pid); 2346 2347 /* Restore selected ptid. */ 2348 do_cleanups (old_chain); 2349 } 2350 2351 /* 2352 * TODO: 2353 * Should save/restore the tty state since it might be that the 2354 * program to be debugged was started on this tty and it wants 2355 * the tty in some state other than what we want. If it's running 2356 * on another terminal or without a terminal, then saving and 2357 * restoring the tty state is a harmless no-op. 2358 * This only needs to be done if we are attaching to a process. 2359 */ 2360 2361 /* attach_command -- 2362 takes a program started up outside of gdb and ``attaches'' to it. 2363 This stops it cold in its tracks and allows us to start debugging it. 2364 and wait for the trace-trap that results from attaching. */ 2365 2366 static void 2367 attach_command_post_wait (char *args, int from_tty, int async_exec) 2368 { 2369 char *exec_file; 2370 char *full_exec_path = NULL; 2371 struct inferior *inferior; 2372 2373 inferior = current_inferior (); 2374 inferior->control.stop_soon = NO_STOP_QUIETLY; 2375 2376 /* If no exec file is yet known, try to determine it from the 2377 process itself. */ 2378 exec_file = (char *) get_exec_file (0); 2379 if (!exec_file) 2380 { 2381 exec_file = target_pid_to_exec_file (PIDGET (inferior_ptid)); 2382 if (exec_file) 2383 { 2384 /* It's possible we don't have a full path, but rather just a 2385 filename. Some targets, such as HP-UX, don't provide the 2386 full path, sigh. 2387 2388 Attempt to qualify the filename against the source path. 2389 (If that fails, we'll just fall back on the original 2390 filename. Not much more we can do...) */ 2391 2392 if (!source_full_path_of (exec_file, &full_exec_path)) 2393 full_exec_path = xstrdup (exec_file); 2394 2395 exec_file_attach (full_exec_path, from_tty); 2396 symbol_file_add_main (full_exec_path, from_tty); 2397 } 2398 } 2399 else 2400 { 2401 reopen_exec_file (); 2402 reread_symbols (); 2403 } 2404 2405 /* Take any necessary post-attaching actions for this platform. */ 2406 target_post_attach (PIDGET (inferior_ptid)); 2407 2408 post_create_inferior (¤t_target, from_tty); 2409 2410 /* Install inferior's terminal modes. */ 2411 target_terminal_inferior (); 2412 2413 if (async_exec) 2414 { 2415 /* The user requested an `attach&', so be sure to leave threads 2416 that didn't get a signal running. */ 2417 2418 /* Immediatelly resume all suspended threads of this inferior, 2419 and this inferior only. This should have no effect on 2420 already running threads. If a thread has been stopped with a 2421 signal, leave it be. */ 2422 if (non_stop) 2423 proceed_after_attach (inferior->pid); 2424 else 2425 { 2426 if (inferior_thread ()->suspend.stop_signal == TARGET_SIGNAL_0) 2427 { 2428 clear_proceed_status (); 2429 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0); 2430 } 2431 } 2432 } 2433 else 2434 { 2435 /* The user requested a plain `attach', so be sure to leave 2436 the inferior stopped. */ 2437 2438 if (target_can_async_p ()) 2439 async_enable_stdin (); 2440 2441 /* At least the current thread is already stopped. */ 2442 2443 /* In all-stop, by definition, all threads have to be already 2444 stopped at this point. In non-stop, however, although the 2445 selected thread is stopped, others may still be executing. 2446 Be sure to explicitly stop all threads of the process. This 2447 should have no effect on already stopped threads. */ 2448 if (non_stop) 2449 target_stop (pid_to_ptid (inferior->pid)); 2450 2451 /* Tell the user/frontend where we're stopped. */ 2452 normal_stop (); 2453 if (deprecated_attach_hook) 2454 deprecated_attach_hook (); 2455 } 2456 } 2457 2458 struct attach_command_continuation_args 2459 { 2460 char *args; 2461 int from_tty; 2462 int async_exec; 2463 }; 2464 2465 static void 2466 attach_command_continuation (void *args, int err) 2467 { 2468 struct attach_command_continuation_args *a = args; 2469 2470 if (err) 2471 return; 2472 2473 attach_command_post_wait (a->args, a->from_tty, a->async_exec); 2474 } 2475 2476 static void 2477 attach_command_continuation_free_args (void *args) 2478 { 2479 struct attach_command_continuation_args *a = args; 2480 2481 xfree (a->args); 2482 xfree (a); 2483 } 2484 2485 void 2486 attach_command (char *args, int from_tty) 2487 { 2488 int async_exec = 0; 2489 struct cleanup *back_to = make_cleanup (null_cleanup, NULL); 2490 2491 dont_repeat (); /* Not for the faint of heart */ 2492 2493 if (gdbarch_has_global_solist (target_gdbarch)) 2494 /* Don't complain if all processes share the same symbol 2495 space. */ 2496 ; 2497 else if (target_has_execution) 2498 { 2499 if (query (_("A program is being debugged already. Kill it? "))) 2500 target_kill (); 2501 else 2502 error (_("Not killed.")); 2503 } 2504 2505 /* Clean up any leftovers from other runs. Some other things from 2506 this function should probably be moved into target_pre_inferior. */ 2507 target_pre_inferior (from_tty); 2508 2509 if (non_stop && !target_supports_non_stop ()) 2510 error (_("Cannot attach to this target in non-stop mode")); 2511 2512 if (args) 2513 { 2514 async_exec = strip_bg_char (&args); 2515 2516 /* If we get a request for running in the bg but the target 2517 doesn't support it, error out. */ 2518 if (async_exec && !target_can_async_p ()) 2519 error (_("Asynchronous execution not supported on this target.")); 2520 } 2521 2522 /* If we don't get a request of running in the bg, then we need 2523 to simulate synchronous (fg) execution. */ 2524 if (!async_exec && target_can_async_p ()) 2525 { 2526 /* Simulate synchronous execution. */ 2527 async_disable_stdin (); 2528 make_cleanup ((make_cleanup_ftype *)async_enable_stdin, NULL); 2529 } 2530 2531 target_attach (args, from_tty); 2532 2533 /* Set up the "saved terminal modes" of the inferior 2534 based on what modes we are starting it with. */ 2535 target_terminal_init (); 2536 2537 /* Set up execution context to know that we should return from 2538 wait_for_inferior as soon as the target reports a stop. */ 2539 init_wait_for_inferior (); 2540 clear_proceed_status (); 2541 2542 if (non_stop) 2543 { 2544 /* If we find that the current thread isn't stopped, explicitly 2545 do so now, because we're going to install breakpoints and 2546 poke at memory. */ 2547 2548 if (async_exec) 2549 /* The user requested an `attach&'; stop just one thread. */ 2550 target_stop (inferior_ptid); 2551 else 2552 /* The user requested an `attach', so stop all threads of this 2553 inferior. */ 2554 target_stop (pid_to_ptid (ptid_get_pid (inferior_ptid))); 2555 } 2556 2557 /* Some system don't generate traps when attaching to inferior. 2558 E.g. Mach 3 or GNU hurd. */ 2559 if (!target_attach_no_wait) 2560 { 2561 struct inferior *inferior = current_inferior (); 2562 2563 /* Careful here. See comments in inferior.h. Basically some 2564 OSes don't ignore SIGSTOPs on continue requests anymore. We 2565 need a way for handle_inferior_event to reset the stop_signal 2566 variable after an attach, and this is what 2567 STOP_QUIETLY_NO_SIGSTOP is for. */ 2568 inferior->control.stop_soon = STOP_QUIETLY_NO_SIGSTOP; 2569 2570 if (target_can_async_p ()) 2571 { 2572 /* sync_execution mode. Wait for stop. */ 2573 struct attach_command_continuation_args *a; 2574 2575 a = xmalloc (sizeof (*a)); 2576 a->args = xstrdup (args); 2577 a->from_tty = from_tty; 2578 a->async_exec = async_exec; 2579 add_inferior_continuation (attach_command_continuation, a, 2580 attach_command_continuation_free_args); 2581 discard_cleanups (back_to); 2582 return; 2583 } 2584 2585 wait_for_inferior (); 2586 } 2587 2588 attach_command_post_wait (args, from_tty, async_exec); 2589 discard_cleanups (back_to); 2590 } 2591 2592 /* We had just found out that the target was already attached to an 2593 inferior. PTID points at a thread of this new inferior, that is 2594 the most likely to be stopped right now, but not necessarily so. 2595 The new inferior is assumed to be already added to the inferior 2596 list at this point. If LEAVE_RUNNING, then leave the threads of 2597 this inferior running, except those we've explicitly seen reported 2598 as stopped. */ 2599 2600 void 2601 notice_new_inferior (ptid_t ptid, int leave_running, int from_tty) 2602 { 2603 struct cleanup* old_chain; 2604 int async_exec; 2605 2606 old_chain = make_cleanup (null_cleanup, NULL); 2607 2608 /* If in non-stop, leave threads as running as they were. If 2609 they're stopped for some reason other than us telling it to, the 2610 target reports a signal != TARGET_SIGNAL_0. We don't try to 2611 resume threads with such a stop signal. */ 2612 async_exec = non_stop; 2613 2614 if (!ptid_equal (inferior_ptid, null_ptid)) 2615 make_cleanup_restore_current_thread (); 2616 2617 switch_to_thread (ptid); 2618 2619 /* When we "notice" a new inferior we need to do all the things we 2620 would normally do if we had just attached to it. */ 2621 2622 if (is_executing (inferior_ptid)) 2623 { 2624 struct inferior *inferior = current_inferior (); 2625 2626 /* We're going to install breakpoints, and poke at memory, 2627 ensure that the inferior is stopped for a moment while we do 2628 that. */ 2629 target_stop (inferior_ptid); 2630 2631 inferior->control.stop_soon = STOP_QUIETLY_REMOTE; 2632 2633 /* Wait for stop before proceeding. */ 2634 if (target_can_async_p ()) 2635 { 2636 struct attach_command_continuation_args *a; 2637 2638 a = xmalloc (sizeof (*a)); 2639 a->args = xstrdup (""); 2640 a->from_tty = from_tty; 2641 a->async_exec = async_exec; 2642 add_inferior_continuation (attach_command_continuation, a, 2643 attach_command_continuation_free_args); 2644 2645 do_cleanups (old_chain); 2646 return; 2647 } 2648 else 2649 wait_for_inferior (); 2650 } 2651 2652 async_exec = leave_running; 2653 attach_command_post_wait ("" /* args */, from_tty, async_exec); 2654 2655 do_cleanups (old_chain); 2656 } 2657 2658 /* 2659 * detach_command -- 2660 * takes a program previously attached to and detaches it. 2661 * The program resumes execution and will no longer stop 2662 * on signals, etc. We better not have left any breakpoints 2663 * in the program or it'll die when it hits one. For this 2664 * to work, it may be necessary for the process to have been 2665 * previously attached. It *might* work if the program was 2666 * started via the normal ptrace (PTRACE_TRACEME). 2667 */ 2668 2669 void 2670 detach_command (char *args, int from_tty) 2671 { 2672 dont_repeat (); /* Not for the faint of heart. */ 2673 2674 if (ptid_equal (inferior_ptid, null_ptid)) 2675 error (_("The program is not being run.")); 2676 2677 disconnect_tracing (from_tty); 2678 2679 target_detach (args, from_tty); 2680 2681 /* If the solist is global across inferiors, don't clear it when we 2682 detach from a single inferior. */ 2683 if (!gdbarch_has_global_solist (target_gdbarch)) 2684 no_shared_libraries (NULL, from_tty); 2685 2686 /* If we still have inferiors to debug, then don't mess with their 2687 threads. */ 2688 if (!have_inferiors ()) 2689 init_thread_list (); 2690 2691 if (deprecated_detach_hook) 2692 deprecated_detach_hook (); 2693 } 2694 2695 /* Disconnect from the current target without resuming it (leaving it 2696 waiting for a debugger). 2697 2698 We'd better not have left any breakpoints in the program or the 2699 next debugger will get confused. Currently only supported for some 2700 remote targets, since the normal attach mechanisms don't work on 2701 stopped processes on some native platforms (e.g. GNU/Linux). */ 2702 2703 static void 2704 disconnect_command (char *args, int from_tty) 2705 { 2706 dont_repeat (); /* Not for the faint of heart. */ 2707 disconnect_tracing (from_tty); 2708 target_disconnect (args, from_tty); 2709 no_shared_libraries (NULL, from_tty); 2710 init_thread_list (); 2711 if (deprecated_detach_hook) 2712 deprecated_detach_hook (); 2713 } 2714 2715 void 2716 interrupt_target_1 (int all_threads) 2717 { 2718 ptid_t ptid; 2719 2720 if (all_threads) 2721 ptid = minus_one_ptid; 2722 else 2723 ptid = inferior_ptid; 2724 target_stop (ptid); 2725 2726 /* Tag the thread as having been explicitly requested to stop, so 2727 other parts of gdb know not to resume this thread automatically, 2728 if it was stopped due to an internal event. Limit this to 2729 non-stop mode, as when debugging a multi-threaded application in 2730 all-stop mode, we will only get one stop event --- it's undefined 2731 which thread will report the event. */ 2732 if (non_stop) 2733 set_stop_requested (ptid, 1); 2734 } 2735 2736 /* Stop the execution of the target while running in async mode, in 2737 the backgound. In all-stop, stop the whole process. In non-stop 2738 mode, stop the current thread only by default, or stop all threads 2739 if the `-a' switch is used. */ 2740 2741 /* interrupt [-a] */ 2742 void 2743 interrupt_target_command (char *args, int from_tty) 2744 { 2745 if (target_can_async_p ()) 2746 { 2747 int all_threads = 0; 2748 2749 dont_repeat (); /* Not for the faint of heart. */ 2750 2751 if (args != NULL 2752 && strncmp (args, "-a", sizeof ("-a") - 1) == 0) 2753 all_threads = 1; 2754 2755 if (!non_stop && all_threads) 2756 error (_("-a is meaningless in all-stop mode.")); 2757 2758 interrupt_target_1 (all_threads); 2759 } 2760 } 2761 2762 static void 2763 print_float_info (struct ui_file *file, 2764 struct frame_info *frame, const char *args) 2765 { 2766 struct gdbarch *gdbarch = get_frame_arch (frame); 2767 2768 if (gdbarch_print_float_info_p (gdbarch)) 2769 gdbarch_print_float_info (gdbarch, file, frame, args); 2770 else 2771 { 2772 int regnum; 2773 int printed_something = 0; 2774 2775 for (regnum = 0; 2776 regnum < gdbarch_num_regs (gdbarch) 2777 + gdbarch_num_pseudo_regs (gdbarch); 2778 regnum++) 2779 { 2780 if (gdbarch_register_reggroup_p (gdbarch, regnum, float_reggroup)) 2781 { 2782 printed_something = 1; 2783 gdbarch_print_registers_info (gdbarch, file, frame, regnum, 1); 2784 } 2785 } 2786 if (!printed_something) 2787 fprintf_filtered (file, "No floating-point info " 2788 "available for this processor.\n"); 2789 } 2790 } 2791 2792 static void 2793 float_info (char *args, int from_tty) 2794 { 2795 if (!target_has_registers) 2796 error (_("The program has no registers now.")); 2797 2798 print_float_info (gdb_stdout, get_selected_frame (NULL), args); 2799 } 2800 2801 static void 2802 unset_command (char *args, int from_tty) 2803 { 2804 printf_filtered (_("\"unset\" must be followed by the " 2805 "name of an unset subcommand.\n")); 2806 help_list (unsetlist, "unset ", -1, gdb_stdout); 2807 } 2808 2809 void 2810 _initialize_infcmd (void) 2811 { 2812 struct cmd_list_element *c = NULL; 2813 2814 /* Add the filename of the terminal connected to inferior I/O. */ 2815 add_setshow_filename_cmd ("inferior-tty", class_run, 2816 &inferior_io_terminal_scratch, _("\ 2817 Set terminal for future runs of program being debugged."), _("\ 2818 Show terminal for future runs of program being debugged."), _("\ 2819 Usage: set inferior-tty /dev/pts/1"), 2820 set_inferior_tty_command, 2821 show_inferior_tty_command, 2822 &setlist, &showlist); 2823 add_com_alias ("tty", "set inferior-tty", class_alias, 0); 2824 2825 add_setshow_optional_filename_cmd ("args", class_run, 2826 &inferior_args_scratch, _("\ 2827 Set argument list to give program being debugged when it is started."), _("\ 2828 Show argument list to give program being debugged when it is started."), _("\ 2829 Follow this command with any number of args, to be passed to the program."), 2830 set_args_command, 2831 show_args_command, 2832 &setlist, &showlist); 2833 2834 c = add_cmd ("environment", no_class, environment_info, _("\ 2835 The environment to give the program, or one variable's value.\n\ 2836 With an argument VAR, prints the value of environment variable VAR to\n\ 2837 give the program being debugged. With no arguments, prints the entire\n\ 2838 environment to be given to the program."), &showlist); 2839 set_cmd_completer (c, noop_completer); 2840 2841 add_prefix_cmd ("unset", no_class, unset_command, 2842 _("Complement to certain \"set\" commands."), 2843 &unsetlist, "unset ", 0, &cmdlist); 2844 2845 c = add_cmd ("environment", class_run, unset_environment_command, _("\ 2846 Cancel environment variable VAR for the program.\n\ 2847 This does not affect the program until the next \"run\" command."), 2848 &unsetlist); 2849 set_cmd_completer (c, noop_completer); 2850 2851 c = add_cmd ("environment", class_run, set_environment_command, _("\ 2852 Set environment variable value to give the program.\n\ 2853 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\ 2854 VALUES of environment variables are uninterpreted strings.\n\ 2855 This does not affect the program until the next \"run\" command."), 2856 &setlist); 2857 set_cmd_completer (c, noop_completer); 2858 2859 c = add_com ("path", class_files, path_command, _("\ 2860 Add directory DIR(s) to beginning of search path for object files.\n\ 2861 $cwd in the path means the current working directory.\n\ 2862 This path is equivalent to the $PATH shell variable. It is a list of\n\ 2863 directories, separated by colons. These directories are searched to find\n\ 2864 fully linked executable files and separately compiled object files as \ 2865 needed.")); 2866 set_cmd_completer (c, filename_completer); 2867 2868 c = add_cmd ("paths", no_class, path_info, _("\ 2869 Current search path for finding object files.\n\ 2870 $cwd in the path means the current working directory.\n\ 2871 This path is equivalent to the $PATH shell variable. It is a list of\n\ 2872 directories, separated by colons. These directories are searched to find\n\ 2873 fully linked executable files and separately compiled object files as \ 2874 needed."), 2875 &showlist); 2876 set_cmd_completer (c, noop_completer); 2877 2878 add_prefix_cmd ("kill", class_run, kill_command, 2879 _("Kill execution of program being debugged."), 2880 &killlist, "kill ", 0, &cmdlist); 2881 2882 add_com ("attach", class_run, attach_command, _("\ 2883 Attach to a process or file outside of GDB.\n\ 2884 This command attaches to another target, of the same type as your last\n\ 2885 \"target\" command (\"info files\" will show your target stack).\n\ 2886 The command may take as argument a process id or a device file.\n\ 2887 For a process id, you must have permission to send the process a signal,\n\ 2888 and it must have the same effective uid as the debugger.\n\ 2889 When using \"attach\" with a process id, the debugger finds the\n\ 2890 program running in the process, looking first in the current working\n\ 2891 directory, or (if not found there) using the source file search path\n\ 2892 (see the \"directory\" command). You can also use the \"file\" command\n\ 2893 to specify the program, and to load its symbol table.")); 2894 2895 add_prefix_cmd ("detach", class_run, detach_command, _("\ 2896 Detach a process or file previously attached.\n\ 2897 If a process, it is no longer traced, and it continues its execution. If\n\ 2898 you were debugging a file, the file is closed and gdb no longer accesses it."), 2899 &detachlist, "detach ", 0, &cmdlist); 2900 2901 add_com ("disconnect", class_run, disconnect_command, _("\ 2902 Disconnect from a target.\n\ 2903 The target will wait for another debugger to connect. Not available for\n\ 2904 all targets.")); 2905 2906 add_com ("signal", class_run, signal_command, _("\ 2907 Continue program giving it signal specified by the argument.\n\ 2908 An argument of \"0\" means continue program without giving it a signal.")); 2909 2910 add_com ("stepi", class_run, stepi_command, _("\ 2911 Step one instruction exactly.\n\ 2912 Argument N means do this N times (or till program stops for another \ 2913 reason).")); 2914 add_com_alias ("si", "stepi", class_alias, 0); 2915 2916 add_com ("nexti", class_run, nexti_command, _("\ 2917 Step one instruction, but proceed through subroutine calls.\n\ 2918 Argument N means do this N times (or till program stops for another \ 2919 reason).")); 2920 add_com_alias ("ni", "nexti", class_alias, 0); 2921 2922 add_com ("finish", class_run, finish_command, _("\ 2923 Execute until selected stack frame returns.\n\ 2924 Upon return, the value returned is printed and put in the value history.")); 2925 add_com_alias ("fin", "finish", class_run, 1); 2926 2927 add_com ("next", class_run, next_command, _("\ 2928 Step program, proceeding through subroutine calls.\n\ 2929 Like the \"step\" command as long as subroutine calls do not happen;\n\ 2930 when they do, the call is treated as one instruction.\n\ 2931 Argument N means do this N times (or till program stops for another \ 2932 reason).")); 2933 add_com_alias ("n", "next", class_run, 1); 2934 if (xdb_commands) 2935 add_com_alias ("S", "next", class_run, 1); 2936 2937 add_com ("step", class_run, step_command, _("\ 2938 Step program until it reaches a different source line.\n\ 2939 Argument N means do this N times (or till program stops for another \ 2940 reason).")); 2941 add_com_alias ("s", "step", class_run, 1); 2942 2943 c = add_com ("until", class_run, until_command, _("\ 2944 Execute until the program reaches a source line greater than the current\n\ 2945 or a specified location (same args as break command) within the current \ 2946 frame.")); 2947 set_cmd_completer (c, location_completer); 2948 add_com_alias ("u", "until", class_run, 1); 2949 2950 c = add_com ("advance", class_run, advance_command, _("\ 2951 Continue the program up to the given location (same form as args for break \ 2952 command).\n\ 2953 Execution will also stop upon exit from the current stack frame.")); 2954 set_cmd_completer (c, location_completer); 2955 2956 c = add_com ("jump", class_run, jump_command, _("\ 2957 Continue program being debugged at specified line or address.\n\ 2958 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\ 2959 for an address to start at.")); 2960 set_cmd_completer (c, location_completer); 2961 2962 if (xdb_commands) 2963 { 2964 c = add_com ("go", class_run, go_command, _("\ 2965 Usage: go <location>\n\ 2966 Continue program being debugged, stopping at specified line or \n\ 2967 address.\n\ 2968 Give as argument either LINENUM or *ADDR, where ADDR is an \n\ 2969 expression for an address to start at.\n\ 2970 This command is a combination of tbreak and jump.")); 2971 set_cmd_completer (c, location_completer); 2972 } 2973 2974 if (xdb_commands) 2975 add_com_alias ("g", "go", class_run, 1); 2976 2977 add_com ("continue", class_run, continue_command, _("\ 2978 Continue program being debugged, after signal or breakpoint.\n\ 2979 If proceeding from breakpoint, a number N may be used as an argument,\n\ 2980 which means to set the ignore count of that breakpoint to N - 1 (so that\n\ 2981 the breakpoint won't break until the Nth time it is reached).\n\ 2982 \n\ 2983 If non-stop mode is enabled, continue only the current thread,\n\ 2984 otherwise all the threads in the program are continued. To \n\ 2985 continue all stopped threads in non-stop mode, use the -a option.\n\ 2986 Specifying -a and an ignore count simultaneously is an error.")); 2987 add_com_alias ("c", "cont", class_run, 1); 2988 add_com_alias ("fg", "cont", class_run, 1); 2989 2990 c = add_com ("run", class_run, run_command, _("\ 2991 Start debugged program. You may specify arguments to give it.\n\ 2992 Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\ 2993 Input and output redirection with \">\", \"<\", or \">>\" are also \ 2994 allowed.\n\n\ 2995 With no arguments, uses arguments last specified (with \"run\" \ 2996 or \"set args\").\n\ 2997 To cancel previous arguments and run with no arguments,\n\ 2998 use \"set args\" without arguments.")); 2999 set_cmd_completer (c, filename_completer); 3000 add_com_alias ("r", "run", class_run, 1); 3001 if (xdb_commands) 3002 add_com ("R", class_run, run_no_args_command, 3003 _("Start debugged program with no arguments.")); 3004 3005 c = add_com ("start", class_run, start_command, _("\ 3006 Run the debugged program until the beginning of the main procedure.\n\ 3007 You may specify arguments to give to your program, just as with the\n\ 3008 \"run\" command.")); 3009 set_cmd_completer (c, filename_completer); 3010 3011 add_com ("interrupt", class_run, interrupt_target_command, 3012 _("Interrupt the execution of the debugged program.\n\ 3013 If non-stop mode is enabled, interrupt only the current thread,\n\ 3014 otherwise all the threads in the program are stopped. To \n\ 3015 interrupt all running threads in non-stop mode, use the -a option.")); 3016 3017 add_info ("registers", nofp_registers_info, _("\ 3018 List of integer registers and their contents, for selected stack frame.\n\ 3019 Register name as argument means describe only that register.")); 3020 add_info_alias ("r", "registers", 1); 3021 3022 if (xdb_commands) 3023 add_com ("lr", class_info, nofp_registers_info, _("\ 3024 List of integer registers and their contents, for selected stack frame.\n\ 3025 Register name as argument means describe only that register.")); 3026 add_info ("all-registers", all_registers_info, _("\ 3027 List of all registers and their contents, for selected stack frame.\n\ 3028 Register name as argument means describe only that register.")); 3029 3030 add_info ("program", program_info, 3031 _("Execution status of the program.")); 3032 3033 add_info ("float", float_info, 3034 _("Print the status of the floating point unit\n")); 3035 3036 add_info ("vector", vector_info, 3037 _("Print the status of the vector unit\n")); 3038 } 3039