1 /* Memory-access and commands for "inferior" process, for GDB. 2 3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 5 2008, 2009, 2010, 2011 Free Software Foundation, Inc. 6 7 This file is part of GDB. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 21 22 #include "defs.h" 23 #include "arch-utils.h" 24 #include <signal.h> 25 #include "gdb_string.h" 26 #include "symtab.h" 27 #include "gdbtypes.h" 28 #include "frame.h" 29 #include "inferior.h" 30 #include "environ.h" 31 #include "value.h" 32 #include "gdbcmd.h" 33 #include "symfile.h" 34 #include "gdbcore.h" 35 #include "target.h" 36 #include "language.h" 37 #include "symfile.h" 38 #include "objfiles.h" 39 #include "completer.h" 40 #include "ui-out.h" 41 #include "event-top.h" 42 #include "parser-defs.h" 43 #include "regcache.h" 44 #include "reggroups.h" 45 #include "block.h" 46 #include "solib.h" 47 #include <ctype.h> 48 #include "gdb_assert.h" 49 #include "observer.h" 50 #include "target-descriptions.h" 51 #include "user-regs.h" 52 #include "exceptions.h" 53 #include "cli/cli-decode.h" 54 #include "gdbthread.h" 55 #include "valprint.h" 56 #include "inline-frame.h" 57 #include "tracepoint.h" 58 59 /* Functions exported for general use, in inferior.h: */ 60 61 void all_registers_info (char *, int); 62 63 void registers_info (char *, int); 64 65 void nexti_command (char *, int); 66 67 void stepi_command (char *, int); 68 69 void continue_command (char *, int); 70 71 void interrupt_target_command (char *args, int from_tty); 72 73 /* Local functions: */ 74 75 static void nofp_registers_info (char *, int); 76 77 static void print_return_value (struct type *func_type, 78 struct type *value_type); 79 80 static void until_next_command (int); 81 82 static void until_command (char *, int); 83 84 static void path_info (char *, int); 85 86 static void path_command (char *, int); 87 88 static void unset_command (char *, int); 89 90 static void float_info (char *, int); 91 92 static void disconnect_command (char *, int); 93 94 static void unset_environment_command (char *, int); 95 96 static void set_environment_command (char *, int); 97 98 static void environment_info (char *, int); 99 100 static void program_info (char *, int); 101 102 static void finish_command (char *, int); 103 104 static void signal_command (char *, int); 105 106 static void jump_command (char *, int); 107 108 static void step_1 (int, int, char *); 109 static void step_once (int skip_subroutines, int single_inst, 110 int count, int thread); 111 112 static void next_command (char *, int); 113 114 static void step_command (char *, int); 115 116 static void run_command (char *, int); 117 118 static void run_no_args_command (char *args, int from_tty); 119 120 static void go_command (char *line_no, int from_tty); 121 122 static int strip_bg_char (char **); 123 124 void _initialize_infcmd (void); 125 126 #define ERROR_NO_INFERIOR \ 127 if (!target_has_execution) error (_("The program is not being run.")); 128 129 /* Scratch area where string containing arguments to give to the 130 program will be stored by 'set args'. As soon as anything is 131 stored, notice_args_set will move it into per-inferior storage. 132 Arguments are separated by spaces. Empty string (pointer to '\0') 133 means no args. */ 134 135 static char *inferior_args_scratch; 136 137 /* Scratch area where 'set inferior-tty' will store user-provided value. 138 We'll immediate copy it into per-inferior storage. */ 139 140 static char *inferior_io_terminal_scratch; 141 142 /* Pid of our debugged inferior, or 0 if no inferior now. 143 Since various parts of infrun.c test this to see whether there is a program 144 being debugged it should be nonzero (currently 3 is used) for remote 145 debugging. */ 146 147 ptid_t inferior_ptid; 148 149 /* Address at which inferior stopped. */ 150 151 CORE_ADDR stop_pc; 152 153 /* Flag indicating that a command has proceeded the inferior past the 154 current breakpoint. */ 155 156 int breakpoint_proceeded; 157 158 /* Nonzero if stopped due to completion of a stack dummy routine. */ 159 160 enum stop_stack_kind stop_stack_dummy; 161 162 /* Nonzero if stopped due to a random (unexpected) signal in inferior 163 process. */ 164 165 int stopped_by_random_signal; 166 167 168 /* Accessor routines. */ 169 170 /* Set the io terminal for the current inferior. Ownership of 171 TERMINAL_NAME is not transferred. */ 172 173 void 174 set_inferior_io_terminal (const char *terminal_name) 175 { 176 xfree (current_inferior ()->terminal); 177 current_inferior ()->terminal = terminal_name ? xstrdup (terminal_name) : 0; 178 } 179 180 const char * 181 get_inferior_io_terminal (void) 182 { 183 return current_inferior ()->terminal; 184 } 185 186 static void 187 set_inferior_tty_command (char *args, int from_tty, 188 struct cmd_list_element *c) 189 { 190 /* CLI has assigned the user-provided value to inferior_io_terminal_scratch. 191 Now route it to current inferior. */ 192 set_inferior_io_terminal (inferior_io_terminal_scratch); 193 } 194 195 static void 196 show_inferior_tty_command (struct ui_file *file, int from_tty, 197 struct cmd_list_element *c, const char *value) 198 { 199 /* Note that we ignore the passed-in value in favor of computing it 200 directly. */ 201 const char *inferior_io_terminal = get_inferior_io_terminal (); 202 203 if (inferior_io_terminal == NULL) 204 inferior_io_terminal = ""; 205 fprintf_filtered (gdb_stdout, 206 _("Terminal for future runs of program being debugged " 207 "is \"%s\".\n"), inferior_io_terminal); 208 } 209 210 char * 211 get_inferior_args (void) 212 { 213 if (current_inferior ()->argc != 0) 214 { 215 char *n; 216 217 n = construct_inferior_arguments (current_inferior ()->argc, 218 current_inferior ()->argv); 219 set_inferior_args (n); 220 xfree (n); 221 } 222 223 if (current_inferior ()->args == NULL) 224 current_inferior ()->args = xstrdup (""); 225 226 return current_inferior ()->args; 227 } 228 229 /* Set the arguments for the current inferior. Ownership of 230 NEWARGS is not transferred. */ 231 232 void 233 set_inferior_args (char *newargs) 234 { 235 xfree (current_inferior ()->args); 236 current_inferior ()->args = newargs ? xstrdup (newargs) : NULL; 237 current_inferior ()->argc = 0; 238 current_inferior ()->argv = 0; 239 } 240 241 void 242 set_inferior_args_vector (int argc, char **argv) 243 { 244 current_inferior ()->argc = argc; 245 current_inferior ()->argv = argv; 246 } 247 248 /* Notice when `set args' is run. */ 249 static void 250 set_args_command (char *args, int from_tty, struct cmd_list_element *c) 251 { 252 /* CLI has assigned the user-provided value to inferior_args_scratch. 253 Now route it to current inferior. */ 254 set_inferior_args (inferior_args_scratch); 255 } 256 257 /* Notice when `show args' is run. */ 258 static void 259 show_args_command (struct ui_file *file, int from_tty, 260 struct cmd_list_element *c, const char *value) 261 { 262 /* Note that we ignore the passed-in value in favor of computing it 263 directly. */ 264 deprecated_show_value_hack (file, from_tty, c, get_inferior_args ()); 265 } 266 267 268 /* Compute command-line string given argument vector. This does the 269 same shell processing as fork_inferior. */ 270 char * 271 construct_inferior_arguments (int argc, char **argv) 272 { 273 char *result; 274 275 if (STARTUP_WITH_SHELL) 276 { 277 /* This holds all the characters considered special to the 278 typical Unix shells. We include `^' because the SunOS 279 /bin/sh treats it as a synonym for `|'. */ 280 char *special = "\"!#$&*()\\|[]{}<>?'\"`~^; \t\n"; 281 int i; 282 int length = 0; 283 char *out, *cp; 284 285 /* We over-compute the size. It shouldn't matter. */ 286 for (i = 0; i < argc; ++i) 287 length += 3 * strlen (argv[i]) + 1 + 2 * (argv[i][0] == '\0'); 288 289 result = (char *) xmalloc (length); 290 out = result; 291 292 for (i = 0; i < argc; ++i) 293 { 294 if (i > 0) 295 *out++ = ' '; 296 297 /* Need to handle empty arguments specially. */ 298 if (argv[i][0] == '\0') 299 { 300 *out++ = '\''; 301 *out++ = '\''; 302 } 303 else 304 { 305 for (cp = argv[i]; *cp; ++cp) 306 { 307 if (*cp == '\n') 308 { 309 /* A newline cannot be quoted with a backslash (it 310 just disappears), only by putting it inside 311 quotes. */ 312 *out++ = '\''; 313 *out++ = '\n'; 314 *out++ = '\''; 315 } 316 else 317 { 318 if (strchr (special, *cp) != NULL) 319 *out++ = '\\'; 320 *out++ = *cp; 321 } 322 } 323 } 324 } 325 *out = '\0'; 326 } 327 else 328 { 329 /* In this case we can't handle arguments that contain spaces, 330 tabs, or newlines -- see breakup_args(). */ 331 int i; 332 int length = 0; 333 334 for (i = 0; i < argc; ++i) 335 { 336 char *cp = strchr (argv[i], ' '); 337 if (cp == NULL) 338 cp = strchr (argv[i], '\t'); 339 if (cp == NULL) 340 cp = strchr (argv[i], '\n'); 341 if (cp != NULL) 342 error (_("can't handle command-line " 343 "argument containing whitespace")); 344 length += strlen (argv[i]) + 1; 345 } 346 347 result = (char *) xmalloc (length); 348 result[0] = '\0'; 349 for (i = 0; i < argc; ++i) 350 { 351 if (i > 0) 352 strcat (result, " "); 353 strcat (result, argv[i]); 354 } 355 } 356 357 return result; 358 } 359 360 361 /* This function detects whether or not a '&' character (indicating 362 background execution) has been added as *the last* of the arguments ARGS 363 of a command. If it has, it removes it and returns 1. Otherwise it 364 does nothing and returns 0. */ 365 static int 366 strip_bg_char (char **args) 367 { 368 char *p = NULL; 369 370 p = strchr (*args, '&'); 371 372 if (p) 373 { 374 if (p == (*args + strlen (*args) - 1)) 375 { 376 if (strlen (*args) > 1) 377 { 378 do 379 p--; 380 while (*p == ' ' || *p == '\t'); 381 *(p + 1) = '\0'; 382 } 383 else 384 *args = 0; 385 return 1; 386 } 387 } 388 return 0; 389 } 390 391 /* Common actions to take after creating any sort of inferior, by any 392 means (running, attaching, connecting, et cetera). The target 393 should be stopped. */ 394 395 void 396 post_create_inferior (struct target_ops *target, int from_tty) 397 { 398 volatile struct gdb_exception ex; 399 400 /* Be sure we own the terminal in case write operations are performed. */ 401 target_terminal_ours (); 402 403 /* If the target hasn't taken care of this already, do it now. 404 Targets which need to access registers during to_open, 405 to_create_inferior, or to_attach should do it earlier; but many 406 don't need to. */ 407 target_find_description (); 408 409 /* Now that we know the register layout, retrieve current PC. But 410 if the PC is unavailable (e.g., we're opening a core file with 411 missing registers info), ignore it. */ 412 stop_pc = 0; 413 TRY_CATCH (ex, RETURN_MASK_ERROR) 414 { 415 stop_pc = regcache_read_pc (get_current_regcache ()); 416 } 417 if (ex.reason < 0 && ex.error != NOT_AVAILABLE_ERROR) 418 throw_exception (ex); 419 420 if (exec_bfd) 421 { 422 /* Create the hooks to handle shared library load and unload 423 events. */ 424 #ifdef SOLIB_CREATE_INFERIOR_HOOK 425 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid)); 426 #else 427 solib_create_inferior_hook (from_tty); 428 #endif 429 } 430 431 /* If the solist is global across processes, there's no need to 432 refetch it here. */ 433 if (exec_bfd && !gdbarch_has_global_solist (target_gdbarch)) 434 { 435 /* Sometimes the platform-specific hook loads initial shared 436 libraries, and sometimes it doesn't. If it doesn't FROM_TTY will be 437 incorrectly 0 but such solib targets should be fixed anyway. If we 438 made all the inferior hook methods consistent, this call could be 439 removed. Call it only after the solib target has been initialized by 440 solib_create_inferior_hook. */ 441 442 #ifdef SOLIB_ADD 443 SOLIB_ADD (NULL, 0, target, auto_solib_add); 444 #else 445 solib_add (NULL, 0, target, auto_solib_add); 446 #endif 447 } 448 449 /* If the user sets watchpoints before execution having started, 450 then she gets software watchpoints, because GDB can't know which 451 target will end up being pushed, or if it supports hardware 452 watchpoints or not. breakpoint_re_set takes care of promoting 453 watchpoints to hardware watchpoints if possible, however, if this 454 new inferior doesn't load shared libraries or we don't pull in 455 symbols from any other source on this target/arch, 456 breakpoint_re_set is never called. Call it now so that software 457 watchpoints get a chance to be promoted to hardware watchpoints 458 if the now pushed target supports hardware watchpoints. */ 459 breakpoint_re_set (); 460 461 observer_notify_inferior_created (target, from_tty); 462 } 463 464 /* Kill the inferior if already running. This function is designed 465 to be called when we are about to start the execution of the program 466 from the beginning. Ask the user to confirm that he wants to restart 467 the program being debugged when FROM_TTY is non-null. */ 468 469 static void 470 kill_if_already_running (int from_tty) 471 { 472 if (! ptid_equal (inferior_ptid, null_ptid) && target_has_execution) 473 { 474 /* Bail out before killing the program if we will not be able to 475 restart it. */ 476 target_require_runnable (); 477 478 if (from_tty 479 && !query (_("The program being debugged has been started already.\n\ 480 Start it from the beginning? "))) 481 error (_("Program not restarted.")); 482 target_kill (); 483 } 484 } 485 486 /* Implement the "run" command. If TBREAK_AT_MAIN is set, then insert 487 a temporary breakpoint at the begining of the main program before 488 running the program. */ 489 490 static void 491 run_command_1 (char *args, int from_tty, int tbreak_at_main) 492 { 493 char *exec_file; 494 struct cleanup *old_chain; 495 ptid_t ptid; 496 497 dont_repeat (); 498 499 kill_if_already_running (from_tty); 500 501 init_wait_for_inferior (); 502 clear_breakpoint_hit_counts (); 503 504 /* Clean up any leftovers from other runs. Some other things from 505 this function should probably be moved into target_pre_inferior. */ 506 target_pre_inferior (from_tty); 507 508 /* The comment here used to read, "The exec file is re-read every 509 time we do a generic_mourn_inferior, so we just have to worry 510 about the symbol file." The `generic_mourn_inferior' function 511 gets called whenever the program exits. However, suppose the 512 program exits, and *then* the executable file changes? We need 513 to check again here. Since reopen_exec_file doesn't do anything 514 if the timestamp hasn't changed, I don't see the harm. */ 515 reopen_exec_file (); 516 reread_symbols (); 517 518 /* Insert the temporary breakpoint if a location was specified. */ 519 if (tbreak_at_main) 520 tbreak_command (main_name (), 0); 521 522 exec_file = (char *) get_exec_file (0); 523 524 if (non_stop && !target_supports_non_stop ()) 525 error (_("The target does not support running in non-stop mode.")); 526 527 /* We keep symbols from add-symbol-file, on the grounds that the 528 user might want to add some symbols before running the program 529 (right?). But sometimes (dynamic loading where the user manually 530 introduces the new symbols with add-symbol-file), the code which 531 the symbols describe does not persist between runs. Currently 532 the user has to manually nuke all symbols between runs if they 533 want them to go away (PR 2207). This is probably reasonable. */ 534 535 if (!args) 536 { 537 if (target_can_async_p ()) 538 async_disable_stdin (); 539 } 540 else 541 { 542 int async_exec = strip_bg_char (&args); 543 544 /* If we get a request for running in the bg but the target 545 doesn't support it, error out. */ 546 if (async_exec && !target_can_async_p ()) 547 error (_("Asynchronous execution not supported on this target.")); 548 549 /* If we don't get a request of running in the bg, then we need 550 to simulate synchronous (fg) execution. */ 551 if (!async_exec && target_can_async_p ()) 552 { 553 /* Simulate synchronous execution. */ 554 async_disable_stdin (); 555 } 556 557 /* If there were other args, beside '&', process them. */ 558 if (args) 559 set_inferior_args (args); 560 } 561 562 if (from_tty) 563 { 564 ui_out_field_string (uiout, NULL, "Starting program"); 565 ui_out_text (uiout, ": "); 566 if (exec_file) 567 ui_out_field_string (uiout, "execfile", exec_file); 568 ui_out_spaces (uiout, 1); 569 /* We call get_inferior_args() because we might need to compute 570 the value now. */ 571 ui_out_field_string (uiout, "infargs", get_inferior_args ()); 572 ui_out_text (uiout, "\n"); 573 ui_out_flush (uiout); 574 } 575 576 /* We call get_inferior_args() because we might need to compute 577 the value now. */ 578 target_create_inferior (exec_file, get_inferior_args (), 579 environ_vector (current_inferior ()->environment), 580 from_tty); 581 582 /* We're starting off a new process. When we get out of here, in 583 non-stop mode, finish the state of all threads of that process, 584 but leave other threads alone, as they may be stopped in internal 585 events --- the frontend shouldn't see them as stopped. In 586 all-stop, always finish the state of all threads, as we may be 587 resuming more than just the new process. */ 588 if (non_stop) 589 ptid = pid_to_ptid (ptid_get_pid (inferior_ptid)); 590 else 591 ptid = minus_one_ptid; 592 old_chain = make_cleanup (finish_thread_state_cleanup, &ptid); 593 594 /* Pass zero for FROM_TTY, because at this point the "run" command 595 has done its thing; now we are setting up the running program. */ 596 post_create_inferior (¤t_target, 0); 597 598 /* Start the target running. Do not use -1 continuation as it would skip 599 breakpoint right at the entry point. */ 600 proceed (regcache_read_pc (get_current_regcache ()), TARGET_SIGNAL_0, 0); 601 602 /* Since there was no error, there's no need to finish the thread 603 states here. */ 604 discard_cleanups (old_chain); 605 } 606 607 static void 608 run_command (char *args, int from_tty) 609 { 610 run_command_1 (args, from_tty, 0); 611 } 612 613 static void 614 run_no_args_command (char *args, int from_tty) 615 { 616 set_inferior_args (""); 617 } 618 619 620 /* Start the execution of the program up until the beginning of the main 621 program. */ 622 623 static void 624 start_command (char *args, int from_tty) 625 { 626 /* Some languages such as Ada need to search inside the program 627 minimal symbols for the location where to put the temporary 628 breakpoint before starting. */ 629 if (!have_minimal_symbols ()) 630 error (_("No symbol table loaded. Use the \"file\" command.")); 631 632 /* Run the program until reaching the main procedure... */ 633 run_command_1 (args, from_tty, 1); 634 } 635 636 static int 637 proceed_thread_callback (struct thread_info *thread, void *arg) 638 { 639 /* We go through all threads individually instead of compressing 640 into a single target `resume_all' request, because some threads 641 may be stopped in internal breakpoints/events, or stopped waiting 642 for its turn in the displaced stepping queue (that is, they are 643 running && !executing). The target side has no idea about why 644 the thread is stopped, so a `resume_all' command would resume too 645 much. If/when GDB gains a way to tell the target `hold this 646 thread stopped until I say otherwise', then we can optimize 647 this. */ 648 if (!is_stopped (thread->ptid)) 649 return 0; 650 651 switch_to_thread (thread->ptid); 652 clear_proceed_status (); 653 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0); 654 return 0; 655 } 656 657 void 658 ensure_valid_thread (void) 659 { 660 if (ptid_equal (inferior_ptid, null_ptid) 661 || is_exited (inferior_ptid)) 662 error (_("Cannot execute this command without a live selected thread.")); 663 } 664 665 /* If the user is looking at trace frames, any resumption of execution 666 is likely to mix up recorded and live target data. So simply 667 disallow those commands. */ 668 669 void 670 ensure_not_tfind_mode (void) 671 { 672 if (get_traceframe_number () >= 0) 673 error (_("Cannot execute this command while looking at trace frames.")); 674 } 675 676 void 677 continue_1 (int all_threads) 678 { 679 ERROR_NO_INFERIOR; 680 ensure_not_tfind_mode (); 681 682 if (non_stop && all_threads) 683 { 684 /* Don't error out if the current thread is running, because 685 there may be other stopped threads. */ 686 struct cleanup *old_chain; 687 688 /* Backup current thread and selected frame. */ 689 old_chain = make_cleanup_restore_current_thread (); 690 691 iterate_over_threads (proceed_thread_callback, NULL); 692 693 /* Restore selected ptid. */ 694 do_cleanups (old_chain); 695 } 696 else 697 { 698 ensure_valid_thread (); 699 ensure_not_running (); 700 clear_proceed_status (); 701 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0); 702 } 703 } 704 705 /* continue [-a] [proceed-count] [&] */ 706 void 707 continue_command (char *args, int from_tty) 708 { 709 int async_exec = 0; 710 int all_threads = 0; 711 ERROR_NO_INFERIOR; 712 713 /* Find out whether we must run in the background. */ 714 if (args != NULL) 715 async_exec = strip_bg_char (&args); 716 717 /* If we must run in the background, but the target can't do it, 718 error out. */ 719 if (async_exec && !target_can_async_p ()) 720 error (_("Asynchronous execution not supported on this target.")); 721 722 /* If we are not asked to run in the bg, then prepare to run in the 723 foreground, synchronously. */ 724 if (!async_exec && target_can_async_p ()) 725 { 726 /* Simulate synchronous execution. */ 727 async_disable_stdin (); 728 } 729 730 if (args != NULL) 731 { 732 if (strncmp (args, "-a", sizeof ("-a") - 1) == 0) 733 { 734 all_threads = 1; 735 args += sizeof ("-a") - 1; 736 if (*args == '\0') 737 args = NULL; 738 } 739 } 740 741 if (!non_stop && all_threads) 742 error (_("`-a' is meaningless in all-stop mode.")); 743 744 if (args != NULL && all_threads) 745 error (_("Can't resume all threads and specify " 746 "proceed count simultaneously.")); 747 748 /* If we have an argument left, set proceed count of breakpoint we 749 stopped at. */ 750 if (args != NULL) 751 { 752 bpstat bs = NULL; 753 int num, stat; 754 int stopped = 0; 755 struct thread_info *tp; 756 757 if (non_stop) 758 tp = find_thread_ptid (inferior_ptid); 759 else 760 { 761 ptid_t last_ptid; 762 struct target_waitstatus ws; 763 764 get_last_target_status (&last_ptid, &ws); 765 tp = find_thread_ptid (last_ptid); 766 } 767 if (tp != NULL) 768 bs = tp->control.stop_bpstat; 769 770 while ((stat = bpstat_num (&bs, &num)) != 0) 771 if (stat > 0) 772 { 773 set_ignore_count (num, 774 parse_and_eval_long (args) - 1, 775 from_tty); 776 /* set_ignore_count prints a message ending with a period. 777 So print two spaces before "Continuing.". */ 778 if (from_tty) 779 printf_filtered (" "); 780 stopped = 1; 781 } 782 783 if (!stopped && from_tty) 784 { 785 printf_filtered 786 ("Not stopped at any breakpoint; argument ignored.\n"); 787 } 788 } 789 790 if (from_tty) 791 printf_filtered (_("Continuing.\n")); 792 793 continue_1 (all_threads); 794 } 795 796 /* Record the starting point of a "step" or "next" command. */ 797 798 static void 799 set_step_frame (void) 800 { 801 struct symtab_and_line sal; 802 803 find_frame_sal (get_current_frame (), &sal); 804 set_step_info (get_current_frame (), sal); 805 } 806 807 /* Step until outside of current statement. */ 808 809 static void 810 step_command (char *count_string, int from_tty) 811 { 812 step_1 (0, 0, count_string); 813 } 814 815 /* Likewise, but skip over subroutine calls as if single instructions. */ 816 817 static void 818 next_command (char *count_string, int from_tty) 819 { 820 step_1 (1, 0, count_string); 821 } 822 823 /* Likewise, but step only one instruction. */ 824 825 void 826 stepi_command (char *count_string, int from_tty) 827 { 828 step_1 (0, 1, count_string); 829 } 830 831 void 832 nexti_command (char *count_string, int from_tty) 833 { 834 step_1 (1, 1, count_string); 835 } 836 837 void 838 delete_longjmp_breakpoint_cleanup (void *arg) 839 { 840 int thread = * (int *) arg; 841 delete_longjmp_breakpoint (thread); 842 } 843 844 static void 845 step_1 (int skip_subroutines, int single_inst, char *count_string) 846 { 847 int count = 1; 848 struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); 849 int async_exec = 0; 850 int thread = -1; 851 852 ERROR_NO_INFERIOR; 853 ensure_not_tfind_mode (); 854 ensure_valid_thread (); 855 ensure_not_running (); 856 857 if (count_string) 858 async_exec = strip_bg_char (&count_string); 859 860 /* If we get a request for running in the bg but the target 861 doesn't support it, error out. */ 862 if (async_exec && !target_can_async_p ()) 863 error (_("Asynchronous execution not supported on this target.")); 864 865 /* If we don't get a request of running in the bg, then we need 866 to simulate synchronous (fg) execution. */ 867 if (!async_exec && target_can_async_p ()) 868 { 869 /* Simulate synchronous execution. */ 870 async_disable_stdin (); 871 } 872 873 count = count_string ? parse_and_eval_long (count_string) : 1; 874 875 if (!single_inst || skip_subroutines) /* Leave si command alone. */ 876 { 877 struct thread_info *tp = inferior_thread (); 878 879 if (in_thread_list (inferior_ptid)) 880 thread = pid_to_thread_id (inferior_ptid); 881 882 set_longjmp_breakpoint (tp, get_frame_id (get_current_frame ())); 883 884 make_cleanup (delete_longjmp_breakpoint_cleanup, &thread); 885 } 886 887 /* In synchronous case, all is well; each step_once call will step once. */ 888 if (!target_can_async_p ()) 889 { 890 for (; count > 0; count--) 891 { 892 struct thread_info *tp; 893 894 step_once (skip_subroutines, single_inst, count, thread); 895 896 if (target_has_execution 897 && !ptid_equal (inferior_ptid, null_ptid)) 898 tp = inferior_thread (); 899 else 900 tp = NULL; 901 902 if (!tp || !tp->control.stop_step || !tp->step_multi) 903 { 904 /* If we stopped for some reason that is not stepping 905 there are no further steps to make. */ 906 if (tp) 907 tp->step_multi = 0; 908 break; 909 } 910 } 911 912 do_cleanups (cleanups); 913 } 914 else 915 { 916 /* In the case of an asynchronous target things get complicated; 917 do only one step for now, before returning control to the 918 event loop. Let the continuation figure out how many other 919 steps we need to do, and handle them one at the time, through 920 step_once. */ 921 step_once (skip_subroutines, single_inst, count, thread); 922 923 /* We are running, and the continuation is installed. It will 924 disable the longjmp breakpoint as appropriate. */ 925 discard_cleanups (cleanups); 926 } 927 } 928 929 struct step_1_continuation_args 930 { 931 int count; 932 int skip_subroutines; 933 int single_inst; 934 int thread; 935 }; 936 937 /* Called after we are done with one step operation, to check whether 938 we need to step again, before we print the prompt and return control 939 to the user. If count is > 1, we will need to do one more call to 940 proceed(), via step_once(). Basically it is like step_once and 941 step_1_continuation are co-recursive. */ 942 static void 943 step_1_continuation (void *args) 944 { 945 struct step_1_continuation_args *a = args; 946 947 if (target_has_execution) 948 { 949 struct thread_info *tp; 950 951 tp = inferior_thread (); 952 if (tp->step_multi && tp->control.stop_step) 953 { 954 /* There are more steps to make, and we did stop due to 955 ending a stepping range. Do another step. */ 956 step_once (a->skip_subroutines, a->single_inst, 957 a->count - 1, a->thread); 958 return; 959 } 960 tp->step_multi = 0; 961 } 962 963 /* We either stopped for some reason that is not stepping, or there 964 are no further steps to make. Cleanup. */ 965 if (!a->single_inst || a->skip_subroutines) 966 delete_longjmp_breakpoint (a->thread); 967 } 968 969 /* Do just one step operation. This is useful to implement the 'step 970 n' kind of commands. In case of asynchronous targets, we will have 971 to set up a continuation to be done after the target stops (after 972 this one step). For synch targets, the caller handles further 973 stepping. */ 974 975 static void 976 step_once (int skip_subroutines, int single_inst, int count, int thread) 977 { 978 struct frame_info *frame = get_current_frame (); 979 980 if (count > 0) 981 { 982 /* Don't assume THREAD is a valid thread id. It is set to -1 if 983 the longjmp breakpoint was not required. Use the 984 INFERIOR_PTID thread instead, which is the same thread when 985 THREAD is set. */ 986 struct thread_info *tp = inferior_thread (); 987 988 clear_proceed_status (); 989 set_step_frame (); 990 991 if (!single_inst) 992 { 993 CORE_ADDR pc; 994 995 /* Step at an inlined function behaves like "down". */ 996 if (!skip_subroutines && !single_inst 997 && inline_skipped_frames (inferior_ptid)) 998 { 999 step_into_inline_frame (inferior_ptid); 1000 if (count > 1) 1001 step_once (skip_subroutines, single_inst, count - 1, thread); 1002 else 1003 /* Pretend that we've stopped. */ 1004 normal_stop (); 1005 return; 1006 } 1007 1008 pc = get_frame_pc (frame); 1009 find_pc_line_pc_range (pc, 1010 &tp->control.step_range_start, 1011 &tp->control.step_range_end); 1012 1013 /* If we have no line info, switch to stepi mode. */ 1014 if (tp->control.step_range_end == 0 && step_stop_if_no_debug) 1015 tp->control.step_range_start = tp->control.step_range_end = 1; 1016 else if (tp->control.step_range_end == 0) 1017 { 1018 char *name; 1019 1020 if (find_pc_partial_function (pc, &name, 1021 &tp->control.step_range_start, 1022 &tp->control.step_range_end) == 0) 1023 error (_("Cannot find bounds of current function")); 1024 1025 target_terminal_ours (); 1026 printf_filtered (_("Single stepping until exit from function %s," 1027 "\nwhich has no line number information.\n"), 1028 name); 1029 } 1030 } 1031 else 1032 { 1033 /* Say we are stepping, but stop after one insn whatever it does. */ 1034 tp->control.step_range_start = tp->control.step_range_end = 1; 1035 if (!skip_subroutines) 1036 /* It is stepi. 1037 Don't step over function calls, not even to functions lacking 1038 line numbers. */ 1039 tp->control.step_over_calls = STEP_OVER_NONE; 1040 } 1041 1042 if (skip_subroutines) 1043 tp->control.step_over_calls = STEP_OVER_ALL; 1044 1045 tp->step_multi = (count > 1); 1046 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1); 1047 1048 /* For async targets, register a continuation to do any 1049 additional steps. For sync targets, the caller will handle 1050 further stepping. */ 1051 if (target_can_async_p ()) 1052 { 1053 struct step_1_continuation_args *args; 1054 1055 args = xmalloc (sizeof (*args)); 1056 args->skip_subroutines = skip_subroutines; 1057 args->single_inst = single_inst; 1058 args->count = count; 1059 args->thread = thread; 1060 1061 add_intermediate_continuation (tp, step_1_continuation, args, xfree); 1062 } 1063 } 1064 } 1065 1066 1067 /* Continue program at specified address. */ 1068 1069 static void 1070 jump_command (char *arg, int from_tty) 1071 { 1072 struct gdbarch *gdbarch = get_current_arch (); 1073 CORE_ADDR addr; 1074 struct symtabs_and_lines sals; 1075 struct symtab_and_line sal; 1076 struct symbol *fn; 1077 struct symbol *sfn; 1078 int async_exec = 0; 1079 1080 ERROR_NO_INFERIOR; 1081 ensure_not_tfind_mode (); 1082 ensure_valid_thread (); 1083 ensure_not_running (); 1084 1085 /* Find out whether we must run in the background. */ 1086 if (arg != NULL) 1087 async_exec = strip_bg_char (&arg); 1088 1089 /* If we must run in the background, but the target can't do it, 1090 error out. */ 1091 if (async_exec && !target_can_async_p ()) 1092 error (_("Asynchronous execution not supported on this target.")); 1093 1094 if (!arg) 1095 error_no_arg (_("starting address")); 1096 1097 sals = decode_line_spec_1 (arg, 1); 1098 if (sals.nelts != 1) 1099 { 1100 error (_("Unreasonable jump request")); 1101 } 1102 1103 sal = sals.sals[0]; 1104 xfree (sals.sals); 1105 1106 if (sal.symtab == 0 && sal.pc == 0) 1107 error (_("No source file has been specified.")); 1108 1109 resolve_sal_pc (&sal); /* May error out. */ 1110 1111 /* See if we are trying to jump to another function. */ 1112 fn = get_frame_function (get_current_frame ()); 1113 sfn = find_pc_function (sal.pc); 1114 if (fn != NULL && sfn != fn) 1115 { 1116 if (!query (_("Line %d is not in `%s'. Jump anyway? "), sal.line, 1117 SYMBOL_PRINT_NAME (fn))) 1118 { 1119 error (_("Not confirmed.")); 1120 /* NOTREACHED */ 1121 } 1122 } 1123 1124 if (sfn != NULL) 1125 { 1126 fixup_symbol_section (sfn, 0); 1127 if (section_is_overlay (SYMBOL_OBJ_SECTION (sfn)) && 1128 !section_is_mapped (SYMBOL_OBJ_SECTION (sfn))) 1129 { 1130 if (!query (_("WARNING!!! Destination is in " 1131 "unmapped overlay! Jump anyway? "))) 1132 { 1133 error (_("Not confirmed.")); 1134 /* NOTREACHED */ 1135 } 1136 } 1137 } 1138 1139 addr = sal.pc; 1140 1141 if (from_tty) 1142 { 1143 printf_filtered (_("Continuing at ")); 1144 fputs_filtered (paddress (gdbarch, addr), gdb_stdout); 1145 printf_filtered (".\n"); 1146 } 1147 1148 /* If we are not asked to run in the bg, then prepare to run in the 1149 foreground, synchronously. */ 1150 if (!async_exec && target_can_async_p ()) 1151 { 1152 /* Simulate synchronous execution. */ 1153 async_disable_stdin (); 1154 } 1155 1156 clear_proceed_status (); 1157 proceed (addr, TARGET_SIGNAL_0, 0); 1158 } 1159 1160 1161 /* Go to line or address in current procedure. */ 1162 static void 1163 go_command (char *line_no, int from_tty) 1164 { 1165 if (line_no == (char *) NULL || !*line_no) 1166 printf_filtered (_("Usage: go <location>\n")); 1167 else 1168 { 1169 tbreak_command (line_no, from_tty); 1170 jump_command (line_no, from_tty); 1171 } 1172 } 1173 1174 1175 /* Continue program giving it specified signal. */ 1176 1177 static void 1178 signal_command (char *signum_exp, int from_tty) 1179 { 1180 enum target_signal oursig; 1181 int async_exec = 0; 1182 1183 dont_repeat (); /* Too dangerous. */ 1184 ERROR_NO_INFERIOR; 1185 ensure_not_tfind_mode (); 1186 ensure_valid_thread (); 1187 ensure_not_running (); 1188 1189 /* Find out whether we must run in the background. */ 1190 if (signum_exp != NULL) 1191 async_exec = strip_bg_char (&signum_exp); 1192 1193 /* If we must run in the background, but the target can't do it, 1194 error out. */ 1195 if (async_exec && !target_can_async_p ()) 1196 error (_("Asynchronous execution not supported on this target.")); 1197 1198 /* If we are not asked to run in the bg, then prepare to run in the 1199 foreground, synchronously. */ 1200 if (!async_exec && target_can_async_p ()) 1201 { 1202 /* Simulate synchronous execution. */ 1203 async_disable_stdin (); 1204 } 1205 1206 if (!signum_exp) 1207 error_no_arg (_("signal number")); 1208 1209 /* It would be even slicker to make signal names be valid expressions, 1210 (the type could be "enum $signal" or some such), then the user could 1211 assign them to convenience variables. */ 1212 oursig = target_signal_from_name (signum_exp); 1213 1214 if (oursig == TARGET_SIGNAL_UNKNOWN) 1215 { 1216 /* No, try numeric. */ 1217 int num = parse_and_eval_long (signum_exp); 1218 1219 if (num == 0) 1220 oursig = TARGET_SIGNAL_0; 1221 else 1222 oursig = target_signal_from_command (num); 1223 } 1224 1225 if (from_tty) 1226 { 1227 if (oursig == TARGET_SIGNAL_0) 1228 printf_filtered (_("Continuing with no signal.\n")); 1229 else 1230 printf_filtered (_("Continuing with signal %s.\n"), 1231 target_signal_to_name (oursig)); 1232 } 1233 1234 clear_proceed_status (); 1235 proceed ((CORE_ADDR) -1, oursig, 0); 1236 } 1237 1238 /* A continuation callback for until_next_command. */ 1239 1240 static void 1241 until_next_continuation (void *arg) 1242 { 1243 struct thread_info *tp = arg; 1244 1245 delete_longjmp_breakpoint (tp->num); 1246 } 1247 1248 /* Proceed until we reach a different source line with pc greater than 1249 our current one or exit the function. We skip calls in both cases. 1250 1251 Note that eventually this command should probably be changed so 1252 that only source lines are printed out when we hit the breakpoint 1253 we set. This may involve changes to wait_for_inferior and the 1254 proceed status code. */ 1255 1256 static void 1257 until_next_command (int from_tty) 1258 { 1259 struct frame_info *frame; 1260 CORE_ADDR pc; 1261 struct symbol *func; 1262 struct symtab_and_line sal; 1263 struct thread_info *tp = inferior_thread (); 1264 int thread = tp->num; 1265 struct cleanup *old_chain; 1266 1267 clear_proceed_status (); 1268 set_step_frame (); 1269 1270 frame = get_current_frame (); 1271 1272 /* Step until either exited from this function or greater 1273 than the current line (if in symbolic section) or pc (if 1274 not). */ 1275 1276 pc = get_frame_pc (frame); 1277 func = find_pc_function (pc); 1278 1279 if (!func) 1280 { 1281 struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (pc); 1282 1283 if (msymbol == NULL) 1284 error (_("Execution is not within a known function.")); 1285 1286 tp->control.step_range_start = SYMBOL_VALUE_ADDRESS (msymbol); 1287 tp->control.step_range_end = pc; 1288 } 1289 else 1290 { 1291 sal = find_pc_line (pc, 0); 1292 1293 tp->control.step_range_start = BLOCK_START (SYMBOL_BLOCK_VALUE (func)); 1294 tp->control.step_range_end = sal.end; 1295 } 1296 1297 tp->control.step_over_calls = STEP_OVER_ALL; 1298 1299 tp->step_multi = 0; /* Only one call to proceed */ 1300 1301 set_longjmp_breakpoint (tp, get_frame_id (frame)); 1302 old_chain = make_cleanup (delete_longjmp_breakpoint_cleanup, &thread); 1303 1304 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1); 1305 1306 if (target_can_async_p () && is_running (inferior_ptid)) 1307 { 1308 discard_cleanups (old_chain); 1309 add_continuation (tp, until_next_continuation, tp, NULL); 1310 } 1311 else 1312 do_cleanups (old_chain); 1313 } 1314 1315 static void 1316 until_command (char *arg, int from_tty) 1317 { 1318 int async_exec = 0; 1319 1320 ERROR_NO_INFERIOR; 1321 ensure_not_tfind_mode (); 1322 ensure_valid_thread (); 1323 ensure_not_running (); 1324 1325 /* Find out whether we must run in the background. */ 1326 if (arg != NULL) 1327 async_exec = strip_bg_char (&arg); 1328 1329 /* If we must run in the background, but the target can't do it, 1330 error out. */ 1331 if (async_exec && !target_can_async_p ()) 1332 error (_("Asynchronous execution not supported on this target.")); 1333 1334 /* If we are not asked to run in the bg, then prepare to run in the 1335 foreground, synchronously. */ 1336 if (!async_exec && target_can_async_p ()) 1337 { 1338 /* Simulate synchronous execution. */ 1339 async_disable_stdin (); 1340 } 1341 1342 if (arg) 1343 until_break_command (arg, from_tty, 0); 1344 else 1345 until_next_command (from_tty); 1346 } 1347 1348 static void 1349 advance_command (char *arg, int from_tty) 1350 { 1351 int async_exec = 0; 1352 1353 ERROR_NO_INFERIOR; 1354 ensure_not_tfind_mode (); 1355 ensure_valid_thread (); 1356 ensure_not_running (); 1357 1358 if (arg == NULL) 1359 error_no_arg (_("a location")); 1360 1361 /* Find out whether we must run in the background. */ 1362 if (arg != NULL) 1363 async_exec = strip_bg_char (&arg); 1364 1365 /* If we must run in the background, but the target can't do it, 1366 error out. */ 1367 if (async_exec && !target_can_async_p ()) 1368 error (_("Asynchronous execution not supported on this target.")); 1369 1370 /* If we are not asked to run in the bg, then prepare to run in the 1371 foreground, synchronously. */ 1372 if (!async_exec && target_can_async_p ()) 1373 { 1374 /* Simulate synchronous execution. */ 1375 async_disable_stdin (); 1376 } 1377 1378 until_break_command (arg, from_tty, 1); 1379 } 1380 1381 /* Print the result of a function at the end of a 'finish' command. */ 1382 1383 static void 1384 print_return_value (struct type *func_type, struct type *value_type) 1385 { 1386 struct gdbarch *gdbarch = get_regcache_arch (stop_registers); 1387 struct cleanup *old_chain; 1388 struct ui_stream *stb; 1389 struct value *value; 1390 1391 CHECK_TYPEDEF (value_type); 1392 gdb_assert (TYPE_CODE (value_type) != TYPE_CODE_VOID); 1393 1394 /* FIXME: 2003-09-27: When returning from a nested inferior function 1395 call, it's possible (with no help from the architecture vector) 1396 to locate and return/print a "struct return" value. This is just 1397 a more complicated case of what is already being done in in the 1398 inferior function call code. In fact, when inferior function 1399 calls are made async, this will likely be made the norm. */ 1400 1401 switch (gdbarch_return_value (gdbarch, func_type, value_type, 1402 NULL, NULL, NULL)) 1403 { 1404 case RETURN_VALUE_REGISTER_CONVENTION: 1405 case RETURN_VALUE_ABI_RETURNS_ADDRESS: 1406 case RETURN_VALUE_ABI_PRESERVES_ADDRESS: 1407 value = allocate_value (value_type); 1408 gdbarch_return_value (gdbarch, func_type, value_type, stop_registers, 1409 value_contents_raw (value), NULL); 1410 break; 1411 case RETURN_VALUE_STRUCT_CONVENTION: 1412 value = NULL; 1413 break; 1414 default: 1415 internal_error (__FILE__, __LINE__, _("bad switch")); 1416 } 1417 1418 if (value) 1419 { 1420 struct value_print_options opts; 1421 1422 /* Print it. */ 1423 stb = ui_out_stream_new (uiout); 1424 old_chain = make_cleanup_ui_out_stream_delete (stb); 1425 ui_out_text (uiout, "Value returned is "); 1426 ui_out_field_fmt (uiout, "gdb-result-var", "$%d", 1427 record_latest_value (value)); 1428 ui_out_text (uiout, " = "); 1429 get_raw_print_options (&opts); 1430 value_print (value, stb->stream, &opts); 1431 ui_out_field_stream (uiout, "return-value", stb); 1432 ui_out_text (uiout, "\n"); 1433 do_cleanups (old_chain); 1434 } 1435 else 1436 { 1437 ui_out_text (uiout, "Value returned has type: "); 1438 ui_out_field_string (uiout, "return-type", TYPE_NAME (value_type)); 1439 ui_out_text (uiout, "."); 1440 ui_out_text (uiout, " Cannot determine contents\n"); 1441 } 1442 } 1443 1444 /* Stuff that needs to be done by the finish command after the target 1445 has stopped. In asynchronous mode, we wait for the target to stop 1446 in the call to poll or select in the event loop, so it is 1447 impossible to do all the stuff as part of the finish_command 1448 function itself. The only chance we have to complete this command 1449 is in fetch_inferior_event, which is called by the event loop as 1450 soon as it detects that the target has stopped. This function is 1451 called via the cmd_continuation pointer. */ 1452 1453 struct finish_command_continuation_args 1454 { 1455 struct breakpoint *breakpoint; 1456 struct symbol *function; 1457 }; 1458 1459 static void 1460 finish_command_continuation (void *arg) 1461 { 1462 struct finish_command_continuation_args *a = arg; 1463 struct thread_info *tp = NULL; 1464 bpstat bs = NULL; 1465 1466 if (!ptid_equal (inferior_ptid, null_ptid) 1467 && target_has_execution 1468 && is_stopped (inferior_ptid)) 1469 { 1470 tp = inferior_thread (); 1471 bs = tp->control.stop_bpstat; 1472 } 1473 1474 if (bpstat_find_breakpoint (bs, a->breakpoint) != NULL 1475 && a->function != NULL) 1476 { 1477 struct type *value_type; 1478 1479 value_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (a->function)); 1480 if (!value_type) 1481 internal_error (__FILE__, __LINE__, 1482 _("finish_command: function has no target type")); 1483 1484 if (TYPE_CODE (value_type) != TYPE_CODE_VOID) 1485 { 1486 volatile struct gdb_exception ex; 1487 1488 TRY_CATCH (ex, RETURN_MASK_ALL) 1489 { 1490 /* print_return_value can throw an exception in some 1491 circumstances. We need to catch this so that we still 1492 delete the breakpoint. */ 1493 print_return_value (SYMBOL_TYPE (a->function), value_type); 1494 } 1495 if (ex.reason < 0) 1496 exception_print (gdb_stdout, ex); 1497 } 1498 } 1499 1500 /* We suppress normal call of normal_stop observer and do it here so 1501 that the *stopped notification includes the return value. */ 1502 if (bs != NULL && tp->control.proceed_to_finish) 1503 observer_notify_normal_stop (bs, 1 /* print frame */); 1504 delete_breakpoint (a->breakpoint); 1505 delete_longjmp_breakpoint (inferior_thread ()->num); 1506 } 1507 1508 static void 1509 finish_command_continuation_free_arg (void *arg) 1510 { 1511 xfree (arg); 1512 } 1513 1514 /* finish_backward -- helper function for finish_command. */ 1515 1516 static void 1517 finish_backward (struct symbol *function) 1518 { 1519 struct symtab_and_line sal; 1520 struct thread_info *tp = inferior_thread (); 1521 struct breakpoint *breakpoint; 1522 struct cleanup *old_chain; 1523 CORE_ADDR pc; 1524 CORE_ADDR func_addr; 1525 int back_up; 1526 1527 pc = get_frame_pc (get_current_frame ()); 1528 1529 if (find_pc_partial_function (pc, NULL, &func_addr, NULL) == 0) 1530 internal_error (__FILE__, __LINE__, 1531 _("Finish: couldn't find function.")); 1532 1533 sal = find_pc_line (func_addr, 0); 1534 1535 /* We don't need a return value. */ 1536 tp->control.proceed_to_finish = 0; 1537 /* Special case: if we're sitting at the function entry point, 1538 then all we need to do is take a reverse singlestep. We 1539 don't need to set a breakpoint, and indeed it would do us 1540 no good to do so. 1541 1542 Note that this can only happen at frame #0, since there's 1543 no way that a function up the stack can have a return address 1544 that's equal to its entry point. */ 1545 1546 if (sal.pc != pc) 1547 { 1548 struct frame_info *frame = get_selected_frame (NULL); 1549 struct gdbarch *gdbarch = get_frame_arch (frame); 1550 1551 /* Set breakpoint and continue. */ 1552 breakpoint = 1553 set_momentary_breakpoint (gdbarch, sal, 1554 get_stack_frame_id (frame), 1555 bp_breakpoint); 1556 /* Tell the breakpoint to keep quiet. We won't be done 1557 until we've done another reverse single-step. */ 1558 breakpoint_set_silent (breakpoint, 1); 1559 old_chain = make_cleanup_delete_breakpoint (breakpoint); 1560 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0); 1561 /* We will be stopped when proceed returns. */ 1562 back_up = (bpstat_find_breakpoint (tp->control.stop_bpstat, breakpoint) 1563 != NULL); 1564 do_cleanups (old_chain); 1565 } 1566 else 1567 back_up = 1; 1568 if (back_up) 1569 { 1570 /* If in fact we hit the step-resume breakpoint (and not 1571 some other breakpoint), then we're almost there -- 1572 we just need to back up by one more single-step. */ 1573 tp->control.step_range_start = tp->control.step_range_end = 1; 1574 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1); 1575 } 1576 return; 1577 } 1578 1579 /* finish_forward -- helper function for finish_command. */ 1580 1581 static void 1582 finish_forward (struct symbol *function, struct frame_info *frame) 1583 { 1584 struct gdbarch *gdbarch = get_frame_arch (frame); 1585 struct symtab_and_line sal; 1586 struct thread_info *tp = inferior_thread (); 1587 struct breakpoint *breakpoint; 1588 struct cleanup *old_chain; 1589 struct finish_command_continuation_args *cargs; 1590 int thread = tp->num; 1591 1592 sal = find_pc_line (get_frame_pc (frame), 0); 1593 sal.pc = get_frame_pc (frame); 1594 1595 breakpoint = set_momentary_breakpoint (gdbarch, sal, 1596 get_stack_frame_id (frame), 1597 bp_finish); 1598 1599 old_chain = make_cleanup_delete_breakpoint (breakpoint); 1600 1601 set_longjmp_breakpoint (tp, get_frame_id (frame)); 1602 make_cleanup (delete_longjmp_breakpoint_cleanup, &thread); 1603 1604 /* We want stop_registers, please... */ 1605 tp->control.proceed_to_finish = 1; 1606 cargs = xmalloc (sizeof (*cargs)); 1607 1608 cargs->breakpoint = breakpoint; 1609 cargs->function = function; 1610 add_continuation (tp, finish_command_continuation, cargs, 1611 finish_command_continuation_free_arg); 1612 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0); 1613 1614 discard_cleanups (old_chain); 1615 if (!target_can_async_p ()) 1616 do_all_continuations (); 1617 } 1618 1619 /* "finish": Set a temporary breakpoint at the place the selected 1620 frame will return to, then continue. */ 1621 1622 static void 1623 finish_command (char *arg, int from_tty) 1624 { 1625 struct frame_info *frame; 1626 struct symbol *function; 1627 1628 int async_exec = 0; 1629 1630 ERROR_NO_INFERIOR; 1631 ensure_not_tfind_mode (); 1632 ensure_valid_thread (); 1633 ensure_not_running (); 1634 1635 /* Find out whether we must run in the background. */ 1636 if (arg != NULL) 1637 async_exec = strip_bg_char (&arg); 1638 1639 /* If we must run in the background, but the target can't do it, 1640 error out. */ 1641 if (async_exec && !target_can_async_p ()) 1642 error (_("Asynchronous execution not supported on this target.")); 1643 1644 /* Don't try to async in reverse. */ 1645 if (async_exec && execution_direction == EXEC_REVERSE) 1646 error (_("Asynchronous 'finish' not supported in reverse.")); 1647 1648 /* If we are not asked to run in the bg, then prepare to run in the 1649 foreground, synchronously. */ 1650 if (!async_exec && target_can_async_p ()) 1651 { 1652 /* Simulate synchronous execution. */ 1653 async_disable_stdin (); 1654 } 1655 1656 if (arg) 1657 error (_("The \"finish\" command does not take any arguments.")); 1658 1659 frame = get_prev_frame (get_selected_frame (_("No selected frame."))); 1660 if (frame == 0) 1661 error (_("\"finish\" not meaningful in the outermost frame.")); 1662 1663 clear_proceed_status (); 1664 1665 /* Finishing from an inline frame is completely different. We don't 1666 try to show the "return value" - no way to locate it. So we do 1667 not need a completion. */ 1668 if (get_frame_type (get_selected_frame (_("No selected frame."))) 1669 == INLINE_FRAME) 1670 { 1671 /* Claim we are stepping in the calling frame. An empty step 1672 range means that we will stop once we aren't in a function 1673 called by that frame. We don't use the magic "1" value for 1674 step_range_end, because then infrun will think this is nexti, 1675 and not step over the rest of this inlined function call. */ 1676 struct thread_info *tp = inferior_thread (); 1677 struct symtab_and_line empty_sal; 1678 1679 init_sal (&empty_sal); 1680 set_step_info (frame, empty_sal); 1681 tp->control.step_range_start = get_frame_pc (frame); 1682 tp->control.step_range_end = tp->control.step_range_start; 1683 tp->control.step_over_calls = STEP_OVER_ALL; 1684 1685 /* Print info on the selected frame, including level number but not 1686 source. */ 1687 if (from_tty) 1688 { 1689 printf_filtered (_("Run till exit from ")); 1690 print_stack_frame (get_selected_frame (NULL), 1, LOCATION); 1691 } 1692 1693 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1); 1694 return; 1695 } 1696 1697 /* Find the function we will return from. */ 1698 1699 function = find_pc_function (get_frame_pc (get_selected_frame (NULL))); 1700 1701 /* Print info on the selected frame, including level number but not 1702 source. */ 1703 if (from_tty) 1704 { 1705 if (execution_direction == EXEC_REVERSE) 1706 printf_filtered (_("Run back to call of ")); 1707 else 1708 printf_filtered (_("Run till exit from ")); 1709 1710 print_stack_frame (get_selected_frame (NULL), 1, LOCATION); 1711 } 1712 1713 if (execution_direction == EXEC_REVERSE) 1714 finish_backward (function); 1715 else 1716 finish_forward (function, frame); 1717 } 1718 1719 1720 static void 1721 program_info (char *args, int from_tty) 1722 { 1723 bpstat bs; 1724 int num, stat; 1725 struct thread_info *tp; 1726 ptid_t ptid; 1727 1728 if (!target_has_execution) 1729 { 1730 printf_filtered (_("The program being debugged is not being run.\n")); 1731 return; 1732 } 1733 1734 if (non_stop) 1735 ptid = inferior_ptid; 1736 else 1737 { 1738 struct target_waitstatus ws; 1739 1740 get_last_target_status (&ptid, &ws); 1741 } 1742 1743 if (ptid_equal (ptid, null_ptid) || is_exited (ptid)) 1744 error (_("Invalid selected thread.")); 1745 else if (is_running (ptid)) 1746 error (_("Selected thread is running.")); 1747 1748 tp = find_thread_ptid (ptid); 1749 bs = tp->control.stop_bpstat; 1750 stat = bpstat_num (&bs, &num); 1751 1752 target_files_info (); 1753 printf_filtered (_("Program stopped at %s.\n"), 1754 paddress (target_gdbarch, stop_pc)); 1755 if (tp->control.stop_step) 1756 printf_filtered (_("It stopped after being stepped.\n")); 1757 else if (stat != 0) 1758 { 1759 /* There may be several breakpoints in the same place, so this 1760 isn't as strange as it seems. */ 1761 while (stat != 0) 1762 { 1763 if (stat < 0) 1764 { 1765 printf_filtered (_("It stopped at a breakpoint " 1766 "that has since been deleted.\n")); 1767 } 1768 else 1769 printf_filtered (_("It stopped at breakpoint %d.\n"), num); 1770 stat = bpstat_num (&bs, &num); 1771 } 1772 } 1773 else if (tp->suspend.stop_signal != TARGET_SIGNAL_0) 1774 { 1775 printf_filtered (_("It stopped with signal %s, %s.\n"), 1776 target_signal_to_name (tp->suspend.stop_signal), 1777 target_signal_to_string (tp->suspend.stop_signal)); 1778 } 1779 1780 if (!from_tty) 1781 { 1782 printf_filtered (_("Type \"info stack\" or \"info " 1783 "registers\" for more information.\n")); 1784 } 1785 } 1786 1787 static void 1788 environment_info (char *var, int from_tty) 1789 { 1790 if (var) 1791 { 1792 char *val = get_in_environ (current_inferior ()->environment, var); 1793 1794 if (val) 1795 { 1796 puts_filtered (var); 1797 puts_filtered (" = "); 1798 puts_filtered (val); 1799 puts_filtered ("\n"); 1800 } 1801 else 1802 { 1803 puts_filtered ("Environment variable \""); 1804 puts_filtered (var); 1805 puts_filtered ("\" not defined.\n"); 1806 } 1807 } 1808 else 1809 { 1810 char **vector = environ_vector (current_inferior ()->environment); 1811 1812 while (*vector) 1813 { 1814 puts_filtered (*vector++); 1815 puts_filtered ("\n"); 1816 } 1817 } 1818 } 1819 1820 static void 1821 set_environment_command (char *arg, int from_tty) 1822 { 1823 char *p, *val, *var; 1824 int nullset = 0; 1825 1826 if (arg == 0) 1827 error_no_arg (_("environment variable and value")); 1828 1829 /* Find seperation between variable name and value. */ 1830 p = (char *) strchr (arg, '='); 1831 val = (char *) strchr (arg, ' '); 1832 1833 if (p != 0 && val != 0) 1834 { 1835 /* We have both a space and an equals. If the space is before the 1836 equals, walk forward over the spaces til we see a nonspace 1837 (possibly the equals). */ 1838 if (p > val) 1839 while (*val == ' ') 1840 val++; 1841 1842 /* Now if the = is after the char following the spaces, 1843 take the char following the spaces. */ 1844 if (p > val) 1845 p = val - 1; 1846 } 1847 else if (val != 0 && p == 0) 1848 p = val; 1849 1850 if (p == arg) 1851 error_no_arg (_("environment variable to set")); 1852 1853 if (p == 0 || p[1] == 0) 1854 { 1855 nullset = 1; 1856 if (p == 0) 1857 p = arg + strlen (arg); /* So that savestring below will work. */ 1858 } 1859 else 1860 { 1861 /* Not setting variable value to null. */ 1862 val = p + 1; 1863 while (*val == ' ' || *val == '\t') 1864 val++; 1865 } 1866 1867 while (p != arg && (p[-1] == ' ' || p[-1] == '\t')) 1868 p--; 1869 1870 var = savestring (arg, p - arg); 1871 if (nullset) 1872 { 1873 printf_filtered (_("Setting environment variable " 1874 "\"%s\" to null value.\n"), 1875 var); 1876 set_in_environ (current_inferior ()->environment, var, ""); 1877 } 1878 else 1879 set_in_environ (current_inferior ()->environment, var, val); 1880 xfree (var); 1881 } 1882 1883 static void 1884 unset_environment_command (char *var, int from_tty) 1885 { 1886 if (var == 0) 1887 { 1888 /* If there is no argument, delete all environment variables. 1889 Ask for confirmation if reading from the terminal. */ 1890 if (!from_tty || query (_("Delete all environment variables? "))) 1891 { 1892 free_environ (current_inferior ()->environment); 1893 current_inferior ()->environment = make_environ (); 1894 } 1895 } 1896 else 1897 unset_in_environ (current_inferior ()->environment, var); 1898 } 1899 1900 /* Handle the execution path (PATH variable). */ 1901 1902 static const char path_var_name[] = "PATH"; 1903 1904 static void 1905 path_info (char *args, int from_tty) 1906 { 1907 puts_filtered ("Executable and object file path: "); 1908 puts_filtered (get_in_environ (current_inferior ()->environment, 1909 path_var_name)); 1910 puts_filtered ("\n"); 1911 } 1912 1913 /* Add zero or more directories to the front of the execution path. */ 1914 1915 static void 1916 path_command (char *dirname, int from_tty) 1917 { 1918 char *exec_path; 1919 char *env; 1920 1921 dont_repeat (); 1922 env = get_in_environ (current_inferior ()->environment, path_var_name); 1923 /* Can be null if path is not set. */ 1924 if (!env) 1925 env = ""; 1926 exec_path = xstrdup (env); 1927 mod_path (dirname, &exec_path); 1928 set_in_environ (current_inferior ()->environment, path_var_name, exec_path); 1929 xfree (exec_path); 1930 if (from_tty) 1931 path_info ((char *) NULL, from_tty); 1932 } 1933 1934 1935 /* Print out the machine register regnum. If regnum is -1, print all 1936 registers (print_all == 1) or all non-float and non-vector 1937 registers (print_all == 0). 1938 1939 For most machines, having all_registers_info() print the 1940 register(s) one per line is good enough. If a different format is 1941 required, (eg, for MIPS or Pyramid 90x, which both have lots of 1942 regs), or there is an existing convention for showing all the 1943 registers, define the architecture method PRINT_REGISTERS_INFO to 1944 provide that format. */ 1945 1946 void 1947 default_print_registers_info (struct gdbarch *gdbarch, 1948 struct ui_file *file, 1949 struct frame_info *frame, 1950 int regnum, int print_all) 1951 { 1952 int i; 1953 const int numregs = gdbarch_num_regs (gdbarch) 1954 + gdbarch_num_pseudo_regs (gdbarch); 1955 1956 for (i = 0; i < numregs; i++) 1957 { 1958 struct type *regtype; 1959 struct value *val; 1960 1961 /* Decide between printing all regs, non-float / vector regs, or 1962 specific reg. */ 1963 if (regnum == -1) 1964 { 1965 if (print_all) 1966 { 1967 if (!gdbarch_register_reggroup_p (gdbarch, i, all_reggroup)) 1968 continue; 1969 } 1970 else 1971 { 1972 if (!gdbarch_register_reggroup_p (gdbarch, i, general_reggroup)) 1973 continue; 1974 } 1975 } 1976 else 1977 { 1978 if (i != regnum) 1979 continue; 1980 } 1981 1982 /* If the register name is empty, it is undefined for this 1983 processor, so don't display anything. */ 1984 if (gdbarch_register_name (gdbarch, i) == NULL 1985 || *(gdbarch_register_name (gdbarch, i)) == '\0') 1986 continue; 1987 1988 fputs_filtered (gdbarch_register_name (gdbarch, i), file); 1989 print_spaces_filtered (15 - strlen (gdbarch_register_name 1990 (gdbarch, i)), file); 1991 1992 regtype = register_type (gdbarch, i); 1993 val = allocate_value (regtype); 1994 1995 /* Get the data in raw format. */ 1996 if (! frame_register_read (frame, i, value_contents_raw (val))) 1997 { 1998 fprintf_filtered (file, "*value not available*\n"); 1999 continue; 2000 } 2001 2002 /* If virtual format is floating, print it that way, and in raw 2003 hex. */ 2004 if (TYPE_CODE (regtype) == TYPE_CODE_FLT 2005 || TYPE_CODE (regtype) == TYPE_CODE_DECFLOAT) 2006 { 2007 int j; 2008 struct value_print_options opts; 2009 const gdb_byte *valaddr = value_contents_for_printing (val); 2010 2011 get_user_print_options (&opts); 2012 opts.deref_ref = 1; 2013 2014 val_print (regtype, 2015 value_contents_for_printing (val), 2016 value_embedded_offset (val), 0, 2017 file, 0, val, &opts, current_language); 2018 2019 fprintf_filtered (file, "\t(raw 0x"); 2020 for (j = 0; j < register_size (gdbarch, i); j++) 2021 { 2022 int idx; 2023 2024 if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) 2025 idx = j; 2026 else 2027 idx = register_size (gdbarch, i) - 1 - j; 2028 fprintf_filtered (file, "%02x", (unsigned char) valaddr[idx]); 2029 } 2030 fprintf_filtered (file, ")"); 2031 } 2032 else 2033 { 2034 struct value_print_options opts; 2035 2036 /* Print the register in hex. */ 2037 get_formatted_print_options (&opts, 'x'); 2038 opts.deref_ref = 1; 2039 val_print (regtype, 2040 value_contents_for_printing (val), 2041 value_embedded_offset (val), 0, 2042 file, 0, val, &opts, current_language); 2043 /* If not a vector register, print it also according to its 2044 natural format. */ 2045 if (TYPE_VECTOR (regtype) == 0) 2046 { 2047 get_user_print_options (&opts); 2048 opts.deref_ref = 1; 2049 fprintf_filtered (file, "\t"); 2050 val_print (regtype, 2051 value_contents_for_printing (val), 2052 value_embedded_offset (val), 0, 2053 file, 0, val, &opts, current_language); 2054 } 2055 } 2056 2057 fprintf_filtered (file, "\n"); 2058 } 2059 } 2060 2061 void 2062 registers_info (char *addr_exp, int fpregs) 2063 { 2064 struct frame_info *frame; 2065 struct gdbarch *gdbarch; 2066 2067 if (!target_has_registers) 2068 error (_("The program has no registers now.")); 2069 frame = get_selected_frame (NULL); 2070 gdbarch = get_frame_arch (frame); 2071 2072 if (!addr_exp) 2073 { 2074 gdbarch_print_registers_info (gdbarch, gdb_stdout, 2075 frame, -1, fpregs); 2076 return; 2077 } 2078 2079 while (*addr_exp != '\0') 2080 { 2081 char *start; 2082 const char *end; 2083 2084 /* Keep skipping leading white space. */ 2085 if (isspace ((*addr_exp))) 2086 { 2087 addr_exp++; 2088 continue; 2089 } 2090 2091 /* Discard any leading ``$''. Check that there is something 2092 resembling a register following it. */ 2093 if (addr_exp[0] == '$') 2094 addr_exp++; 2095 if (isspace ((*addr_exp)) || (*addr_exp) == '\0') 2096 error (_("Missing register name")); 2097 2098 /* Find the start/end of this register name/num/group. */ 2099 start = addr_exp; 2100 while ((*addr_exp) != '\0' && !isspace ((*addr_exp))) 2101 addr_exp++; 2102 end = addr_exp; 2103 2104 /* Figure out what we've found and display it. */ 2105 2106 /* A register name? */ 2107 { 2108 int regnum = user_reg_map_name_to_regnum (gdbarch, start, end - start); 2109 2110 if (regnum >= 0) 2111 { 2112 /* User registers lie completely outside of the range of 2113 normal registers. Catch them early so that the target 2114 never sees them. */ 2115 if (regnum >= gdbarch_num_regs (gdbarch) 2116 + gdbarch_num_pseudo_regs (gdbarch)) 2117 { 2118 struct value_print_options opts; 2119 struct value *val = value_of_user_reg (regnum, frame); 2120 2121 printf_filtered ("%s: ", start); 2122 get_formatted_print_options (&opts, 'x'); 2123 val_print_scalar_formatted (check_typedef (value_type (val)), 2124 value_contents_for_printing (val), 2125 value_embedded_offset (val), 2126 val, 2127 &opts, 0, gdb_stdout); 2128 printf_filtered ("\n"); 2129 } 2130 else 2131 gdbarch_print_registers_info (gdbarch, gdb_stdout, 2132 frame, regnum, fpregs); 2133 continue; 2134 } 2135 } 2136 2137 /* A register group? */ 2138 { 2139 struct reggroup *group; 2140 2141 for (group = reggroup_next (gdbarch, NULL); 2142 group != NULL; 2143 group = reggroup_next (gdbarch, group)) 2144 { 2145 /* Don't bother with a length check. Should the user 2146 enter a short register group name, go with the first 2147 group that matches. */ 2148 if (strncmp (start, reggroup_name (group), end - start) == 0) 2149 break; 2150 } 2151 if (group != NULL) 2152 { 2153 int regnum; 2154 2155 for (regnum = 0; 2156 regnum < gdbarch_num_regs (gdbarch) 2157 + gdbarch_num_pseudo_regs (gdbarch); 2158 regnum++) 2159 { 2160 if (gdbarch_register_reggroup_p (gdbarch, regnum, group)) 2161 gdbarch_print_registers_info (gdbarch, 2162 gdb_stdout, frame, 2163 regnum, fpregs); 2164 } 2165 continue; 2166 } 2167 } 2168 2169 /* Nothing matched. */ 2170 error (_("Invalid register `%.*s'"), (int) (end - start), start); 2171 } 2172 } 2173 2174 void 2175 all_registers_info (char *addr_exp, int from_tty) 2176 { 2177 registers_info (addr_exp, 1); 2178 } 2179 2180 static void 2181 nofp_registers_info (char *addr_exp, int from_tty) 2182 { 2183 registers_info (addr_exp, 0); 2184 } 2185 2186 static void 2187 print_vector_info (struct ui_file *file, 2188 struct frame_info *frame, const char *args) 2189 { 2190 struct gdbarch *gdbarch = get_frame_arch (frame); 2191 2192 if (gdbarch_print_vector_info_p (gdbarch)) 2193 gdbarch_print_vector_info (gdbarch, file, frame, args); 2194 else 2195 { 2196 int regnum; 2197 int printed_something = 0; 2198 2199 for (regnum = 0; 2200 regnum < gdbarch_num_regs (gdbarch) 2201 + gdbarch_num_pseudo_regs (gdbarch); 2202 regnum++) 2203 { 2204 if (gdbarch_register_reggroup_p (gdbarch, regnum, vector_reggroup)) 2205 { 2206 printed_something = 1; 2207 gdbarch_print_registers_info (gdbarch, file, frame, regnum, 1); 2208 } 2209 } 2210 if (!printed_something) 2211 fprintf_filtered (file, "No vector information\n"); 2212 } 2213 } 2214 2215 static void 2216 vector_info (char *args, int from_tty) 2217 { 2218 if (!target_has_registers) 2219 error (_("The program has no registers now.")); 2220 2221 print_vector_info (gdb_stdout, get_selected_frame (NULL), args); 2222 } 2223 2224 /* Kill the inferior process. Make us have no inferior. */ 2225 2226 static void 2227 kill_command (char *arg, int from_tty) 2228 { 2229 /* FIXME: This should not really be inferior_ptid (or target_has_execution). 2230 It should be a distinct flag that indicates that a target is active, cuz 2231 some targets don't have processes! */ 2232 2233 if (ptid_equal (inferior_ptid, null_ptid)) 2234 error (_("The program is not being run.")); 2235 if (!query (_("Kill the program being debugged? "))) 2236 error (_("Not confirmed.")); 2237 target_kill (); 2238 2239 /* If we still have other inferiors to debug, then don't mess with 2240 with their threads. */ 2241 if (!have_inferiors ()) 2242 { 2243 init_thread_list (); /* Destroy thread info. */ 2244 2245 /* Killing off the inferior can leave us with a core file. If 2246 so, print the state we are left in. */ 2247 if (target_has_stack) 2248 { 2249 printf_filtered (_("In %s,\n"), target_longname); 2250 print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); 2251 } 2252 } 2253 bfd_cache_close_all (); 2254 } 2255 2256 /* Used in `attach&' command. ARG is a point to an integer 2257 representing a process id. Proceed threads of this process iff 2258 they stopped due to debugger request, and when they did, they 2259 reported a clean stop (TARGET_SIGNAL_0). Do not proceed threads 2260 that have been explicitly been told to stop. */ 2261 2262 static int 2263 proceed_after_attach_callback (struct thread_info *thread, 2264 void *arg) 2265 { 2266 int pid = * (int *) arg; 2267 2268 if (ptid_get_pid (thread->ptid) == pid 2269 && !is_exited (thread->ptid) 2270 && !is_executing (thread->ptid) 2271 && !thread->stop_requested 2272 && thread->suspend.stop_signal == TARGET_SIGNAL_0) 2273 { 2274 switch_to_thread (thread->ptid); 2275 clear_proceed_status (); 2276 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0); 2277 } 2278 2279 return 0; 2280 } 2281 2282 static void 2283 proceed_after_attach (int pid) 2284 { 2285 /* Don't error out if the current thread is running, because 2286 there may be other stopped threads. */ 2287 struct cleanup *old_chain; 2288 2289 /* Backup current thread and selected frame. */ 2290 old_chain = make_cleanup_restore_current_thread (); 2291 2292 iterate_over_threads (proceed_after_attach_callback, &pid); 2293 2294 /* Restore selected ptid. */ 2295 do_cleanups (old_chain); 2296 } 2297 2298 /* 2299 * TODO: 2300 * Should save/restore the tty state since it might be that the 2301 * program to be debugged was started on this tty and it wants 2302 * the tty in some state other than what we want. If it's running 2303 * on another terminal or without a terminal, then saving and 2304 * restoring the tty state is a harmless no-op. 2305 * This only needs to be done if we are attaching to a process. 2306 */ 2307 2308 /* attach_command -- 2309 takes a program started up outside of gdb and ``attaches'' to it. 2310 This stops it cold in its tracks and allows us to start debugging it. 2311 and wait for the trace-trap that results from attaching. */ 2312 2313 static void 2314 attach_command_post_wait (char *args, int from_tty, int async_exec) 2315 { 2316 char *exec_file; 2317 char *full_exec_path = NULL; 2318 struct inferior *inferior; 2319 2320 inferior = current_inferior (); 2321 inferior->control.stop_soon = NO_STOP_QUIETLY; 2322 2323 /* If no exec file is yet known, try to determine it from the 2324 process itself. */ 2325 exec_file = (char *) get_exec_file (0); 2326 if (!exec_file) 2327 { 2328 exec_file = target_pid_to_exec_file (PIDGET (inferior_ptid)); 2329 if (exec_file) 2330 { 2331 /* It's possible we don't have a full path, but rather just a 2332 filename. Some targets, such as HP-UX, don't provide the 2333 full path, sigh. 2334 2335 Attempt to qualify the filename against the source path. 2336 (If that fails, we'll just fall back on the original 2337 filename. Not much more we can do...) */ 2338 2339 if (!source_full_path_of (exec_file, &full_exec_path)) 2340 full_exec_path = xstrdup (exec_file); 2341 2342 exec_file_attach (full_exec_path, from_tty); 2343 symbol_file_add_main (full_exec_path, from_tty); 2344 } 2345 } 2346 else 2347 { 2348 reopen_exec_file (); 2349 reread_symbols (); 2350 } 2351 2352 /* Take any necessary post-attaching actions for this platform. */ 2353 target_post_attach (PIDGET (inferior_ptid)); 2354 2355 post_create_inferior (¤t_target, from_tty); 2356 2357 /* Install inferior's terminal modes. */ 2358 target_terminal_inferior (); 2359 2360 if (async_exec) 2361 { 2362 /* The user requested an `attach&', so be sure to leave threads 2363 that didn't get a signal running. */ 2364 2365 /* Immediatelly resume all suspended threads of this inferior, 2366 and this inferior only. This should have no effect on 2367 already running threads. If a thread has been stopped with a 2368 signal, leave it be. */ 2369 if (non_stop) 2370 proceed_after_attach (inferior->pid); 2371 else 2372 { 2373 if (inferior_thread ()->suspend.stop_signal == TARGET_SIGNAL_0) 2374 { 2375 clear_proceed_status (); 2376 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0); 2377 } 2378 } 2379 } 2380 else 2381 { 2382 /* The user requested a plain `attach', so be sure to leave 2383 the inferior stopped. */ 2384 2385 if (target_can_async_p ()) 2386 async_enable_stdin (); 2387 2388 /* At least the current thread is already stopped. */ 2389 2390 /* In all-stop, by definition, all threads have to be already 2391 stopped at this point. In non-stop, however, although the 2392 selected thread is stopped, others may still be executing. 2393 Be sure to explicitly stop all threads of the process. This 2394 should have no effect on already stopped threads. */ 2395 if (non_stop) 2396 target_stop (pid_to_ptid (inferior->pid)); 2397 2398 /* Tell the user/frontend where we're stopped. */ 2399 normal_stop (); 2400 if (deprecated_attach_hook) 2401 deprecated_attach_hook (); 2402 } 2403 } 2404 2405 struct attach_command_continuation_args 2406 { 2407 char *args; 2408 int from_tty; 2409 int async_exec; 2410 }; 2411 2412 static void 2413 attach_command_continuation (void *args) 2414 { 2415 struct attach_command_continuation_args *a = args; 2416 2417 attach_command_post_wait (a->args, a->from_tty, a->async_exec); 2418 } 2419 2420 static void 2421 attach_command_continuation_free_args (void *args) 2422 { 2423 struct attach_command_continuation_args *a = args; 2424 2425 xfree (a->args); 2426 xfree (a); 2427 } 2428 2429 void 2430 attach_command (char *args, int from_tty) 2431 { 2432 int async_exec = 0; 2433 struct cleanup *back_to = make_cleanup (null_cleanup, NULL); 2434 2435 dont_repeat (); /* Not for the faint of heart */ 2436 2437 if (gdbarch_has_global_solist (target_gdbarch)) 2438 /* Don't complain if all processes share the same symbol 2439 space. */ 2440 ; 2441 else if (target_has_execution) 2442 { 2443 if (query (_("A program is being debugged already. Kill it? "))) 2444 target_kill (); 2445 else 2446 error (_("Not killed.")); 2447 } 2448 2449 /* Clean up any leftovers from other runs. Some other things from 2450 this function should probably be moved into target_pre_inferior. */ 2451 target_pre_inferior (from_tty); 2452 2453 if (non_stop && !target_supports_non_stop ()) 2454 error (_("Cannot attach to this target in non-stop mode")); 2455 2456 if (args) 2457 { 2458 async_exec = strip_bg_char (&args); 2459 2460 /* If we get a request for running in the bg but the target 2461 doesn't support it, error out. */ 2462 if (async_exec && !target_can_async_p ()) 2463 error (_("Asynchronous execution not supported on this target.")); 2464 } 2465 2466 /* If we don't get a request of running in the bg, then we need 2467 to simulate synchronous (fg) execution. */ 2468 if (!async_exec && target_can_async_p ()) 2469 { 2470 /* Simulate synchronous execution. */ 2471 async_disable_stdin (); 2472 make_cleanup ((make_cleanup_ftype *)async_enable_stdin, NULL); 2473 } 2474 2475 target_attach (args, from_tty); 2476 2477 /* Set up the "saved terminal modes" of the inferior 2478 based on what modes we are starting it with. */ 2479 target_terminal_init (); 2480 2481 /* Set up execution context to know that we should return from 2482 wait_for_inferior as soon as the target reports a stop. */ 2483 init_wait_for_inferior (); 2484 clear_proceed_status (); 2485 2486 if (non_stop) 2487 { 2488 /* If we find that the current thread isn't stopped, explicitly 2489 do so now, because we're going to install breakpoints and 2490 poke at memory. */ 2491 2492 if (async_exec) 2493 /* The user requested an `attach&'; stop just one thread. */ 2494 target_stop (inferior_ptid); 2495 else 2496 /* The user requested an `attach', so stop all threads of this 2497 inferior. */ 2498 target_stop (pid_to_ptid (ptid_get_pid (inferior_ptid))); 2499 } 2500 2501 /* Some system don't generate traps when attaching to inferior. 2502 E.g. Mach 3 or GNU hurd. */ 2503 if (!target_attach_no_wait) 2504 { 2505 struct inferior *inferior = current_inferior (); 2506 2507 /* Careful here. See comments in inferior.h. Basically some 2508 OSes don't ignore SIGSTOPs on continue requests anymore. We 2509 need a way for handle_inferior_event to reset the stop_signal 2510 variable after an attach, and this is what 2511 STOP_QUIETLY_NO_SIGSTOP is for. */ 2512 inferior->control.stop_soon = STOP_QUIETLY_NO_SIGSTOP; 2513 2514 if (target_can_async_p ()) 2515 { 2516 /* sync_execution mode. Wait for stop. */ 2517 struct attach_command_continuation_args *a; 2518 2519 a = xmalloc (sizeof (*a)); 2520 a->args = xstrdup (args); 2521 a->from_tty = from_tty; 2522 a->async_exec = async_exec; 2523 add_inferior_continuation (attach_command_continuation, a, 2524 attach_command_continuation_free_args); 2525 discard_cleanups (back_to); 2526 return; 2527 } 2528 2529 wait_for_inferior (0); 2530 } 2531 2532 attach_command_post_wait (args, from_tty, async_exec); 2533 discard_cleanups (back_to); 2534 } 2535 2536 /* We had just found out that the target was already attached to an 2537 inferior. PTID points at a thread of this new inferior, that is 2538 the most likely to be stopped right now, but not necessarily so. 2539 The new inferior is assumed to be already added to the inferior 2540 list at this point. If LEAVE_RUNNING, then leave the threads of 2541 this inferior running, except those we've explicitly seen reported 2542 as stopped. */ 2543 2544 void 2545 notice_new_inferior (ptid_t ptid, int leave_running, int from_tty) 2546 { 2547 struct cleanup* old_chain; 2548 int async_exec; 2549 2550 old_chain = make_cleanup (null_cleanup, NULL); 2551 2552 /* If in non-stop, leave threads as running as they were. If 2553 they're stopped for some reason other than us telling it to, the 2554 target reports a signal != TARGET_SIGNAL_0. We don't try to 2555 resume threads with such a stop signal. */ 2556 async_exec = non_stop; 2557 2558 if (!ptid_equal (inferior_ptid, null_ptid)) 2559 make_cleanup_restore_current_thread (); 2560 2561 switch_to_thread (ptid); 2562 2563 /* When we "notice" a new inferior we need to do all the things we 2564 would normally do if we had just attached to it. */ 2565 2566 if (is_executing (inferior_ptid)) 2567 { 2568 struct inferior *inferior = current_inferior (); 2569 2570 /* We're going to install breakpoints, and poke at memory, 2571 ensure that the inferior is stopped for a moment while we do 2572 that. */ 2573 target_stop (inferior_ptid); 2574 2575 inferior->control.stop_soon = STOP_QUIETLY_REMOTE; 2576 2577 /* Wait for stop before proceeding. */ 2578 if (target_can_async_p ()) 2579 { 2580 struct attach_command_continuation_args *a; 2581 2582 a = xmalloc (sizeof (*a)); 2583 a->args = xstrdup (""); 2584 a->from_tty = from_tty; 2585 a->async_exec = async_exec; 2586 add_inferior_continuation (attach_command_continuation, a, 2587 attach_command_continuation_free_args); 2588 2589 do_cleanups (old_chain); 2590 return; 2591 } 2592 else 2593 wait_for_inferior (0); 2594 } 2595 2596 async_exec = leave_running; 2597 attach_command_post_wait ("" /* args */, from_tty, async_exec); 2598 2599 do_cleanups (old_chain); 2600 } 2601 2602 /* 2603 * detach_command -- 2604 * takes a program previously attached to and detaches it. 2605 * The program resumes execution and will no longer stop 2606 * on signals, etc. We better not have left any breakpoints 2607 * in the program or it'll die when it hits one. For this 2608 * to work, it may be necessary for the process to have been 2609 * previously attached. It *might* work if the program was 2610 * started via the normal ptrace (PTRACE_TRACEME). 2611 */ 2612 2613 void 2614 detach_command (char *args, int from_tty) 2615 { 2616 dont_repeat (); /* Not for the faint of heart. */ 2617 2618 if (ptid_equal (inferior_ptid, null_ptid)) 2619 error (_("The program is not being run.")); 2620 2621 disconnect_tracing (from_tty); 2622 2623 target_detach (args, from_tty); 2624 2625 /* If the solist is global across inferiors, don't clear it when we 2626 detach from a single inferior. */ 2627 if (!gdbarch_has_global_solist (target_gdbarch)) 2628 no_shared_libraries (NULL, from_tty); 2629 2630 /* If we still have inferiors to debug, then don't mess with their 2631 threads. */ 2632 if (!have_inferiors ()) 2633 init_thread_list (); 2634 2635 if (deprecated_detach_hook) 2636 deprecated_detach_hook (); 2637 } 2638 2639 /* Disconnect from the current target without resuming it (leaving it 2640 waiting for a debugger). 2641 2642 We'd better not have left any breakpoints in the program or the 2643 next debugger will get confused. Currently only supported for some 2644 remote targets, since the normal attach mechanisms don't work on 2645 stopped processes on some native platforms (e.g. GNU/Linux). */ 2646 2647 static void 2648 disconnect_command (char *args, int from_tty) 2649 { 2650 dont_repeat (); /* Not for the faint of heart. */ 2651 target_disconnect (args, from_tty); 2652 no_shared_libraries (NULL, from_tty); 2653 init_thread_list (); 2654 if (deprecated_detach_hook) 2655 deprecated_detach_hook (); 2656 } 2657 2658 void 2659 interrupt_target_1 (int all_threads) 2660 { 2661 ptid_t ptid; 2662 2663 if (all_threads) 2664 ptid = minus_one_ptid; 2665 else 2666 ptid = inferior_ptid; 2667 target_stop (ptid); 2668 2669 /* Tag the thread as having been explicitly requested to stop, so 2670 other parts of gdb know not to resume this thread automatically, 2671 if it was stopped due to an internal event. Limit this to 2672 non-stop mode, as when debugging a multi-threaded application in 2673 all-stop mode, we will only get one stop event --- it's undefined 2674 which thread will report the event. */ 2675 if (non_stop) 2676 set_stop_requested (ptid, 1); 2677 } 2678 2679 /* Stop the execution of the target while running in async mode, in 2680 the backgound. In all-stop, stop the whole process. In non-stop 2681 mode, stop the current thread only by default, or stop all threads 2682 if the `-a' switch is used. */ 2683 2684 /* interrupt [-a] */ 2685 void 2686 interrupt_target_command (char *args, int from_tty) 2687 { 2688 if (target_can_async_p ()) 2689 { 2690 int all_threads = 0; 2691 2692 dont_repeat (); /* Not for the faint of heart. */ 2693 2694 if (args != NULL 2695 && strncmp (args, "-a", sizeof ("-a") - 1) == 0) 2696 all_threads = 1; 2697 2698 if (!non_stop && all_threads) 2699 error (_("-a is meaningless in all-stop mode.")); 2700 2701 interrupt_target_1 (all_threads); 2702 } 2703 } 2704 2705 static void 2706 print_float_info (struct ui_file *file, 2707 struct frame_info *frame, const char *args) 2708 { 2709 struct gdbarch *gdbarch = get_frame_arch (frame); 2710 2711 if (gdbarch_print_float_info_p (gdbarch)) 2712 gdbarch_print_float_info (gdbarch, file, frame, args); 2713 else 2714 { 2715 int regnum; 2716 int printed_something = 0; 2717 2718 for (regnum = 0; 2719 regnum < gdbarch_num_regs (gdbarch) 2720 + gdbarch_num_pseudo_regs (gdbarch); 2721 regnum++) 2722 { 2723 if (gdbarch_register_reggroup_p (gdbarch, regnum, float_reggroup)) 2724 { 2725 printed_something = 1; 2726 gdbarch_print_registers_info (gdbarch, file, frame, regnum, 1); 2727 } 2728 } 2729 if (!printed_something) 2730 fprintf_filtered (file, "No floating-point info " 2731 "available for this processor.\n"); 2732 } 2733 } 2734 2735 static void 2736 float_info (char *args, int from_tty) 2737 { 2738 if (!target_has_registers) 2739 error (_("The program has no registers now.")); 2740 2741 print_float_info (gdb_stdout, get_selected_frame (NULL), args); 2742 } 2743 2744 static void 2745 unset_command (char *args, int from_tty) 2746 { 2747 printf_filtered (_("\"unset\" must be followed by the " 2748 "name of an unset subcommand.\n")); 2749 help_list (unsetlist, "unset ", -1, gdb_stdout); 2750 } 2751 2752 void 2753 _initialize_infcmd (void) 2754 { 2755 struct cmd_list_element *c = NULL; 2756 2757 /* Add the filename of the terminal connected to inferior I/O. */ 2758 add_setshow_filename_cmd ("inferior-tty", class_run, 2759 &inferior_io_terminal_scratch, _("\ 2760 Set terminal for future runs of program being debugged."), _("\ 2761 Show terminal for future runs of program being debugged."), _("\ 2762 Usage: set inferior-tty /dev/pts/1"), 2763 set_inferior_tty_command, 2764 show_inferior_tty_command, 2765 &setlist, &showlist); 2766 add_com_alias ("tty", "set inferior-tty", class_alias, 0); 2767 2768 add_setshow_optional_filename_cmd ("args", class_run, 2769 &inferior_args_scratch, _("\ 2770 Set argument list to give program being debugged when it is started."), _("\ 2771 Show argument list to give program being debugged when it is started."), _("\ 2772 Follow this command with any number of args, to be passed to the program."), 2773 set_args_command, 2774 show_args_command, 2775 &setlist, &showlist); 2776 2777 c = add_cmd ("environment", no_class, environment_info, _("\ 2778 The environment to give the program, or one variable's value.\n\ 2779 With an argument VAR, prints the value of environment variable VAR to\n\ 2780 give the program being debugged. With no arguments, prints the entire\n\ 2781 environment to be given to the program."), &showlist); 2782 set_cmd_completer (c, noop_completer); 2783 2784 add_prefix_cmd ("unset", no_class, unset_command, 2785 _("Complement to certain \"set\" commands."), 2786 &unsetlist, "unset ", 0, &cmdlist); 2787 2788 c = add_cmd ("environment", class_run, unset_environment_command, _("\ 2789 Cancel environment variable VAR for the program.\n\ 2790 This does not affect the program until the next \"run\" command."), 2791 &unsetlist); 2792 set_cmd_completer (c, noop_completer); 2793 2794 c = add_cmd ("environment", class_run, set_environment_command, _("\ 2795 Set environment variable value to give the program.\n\ 2796 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\ 2797 VALUES of environment variables are uninterpreted strings.\n\ 2798 This does not affect the program until the next \"run\" command."), 2799 &setlist); 2800 set_cmd_completer (c, noop_completer); 2801 2802 c = add_com ("path", class_files, path_command, _("\ 2803 Add directory DIR(s) to beginning of search path for object files.\n\ 2804 $cwd in the path means the current working directory.\n\ 2805 This path is equivalent to the $PATH shell variable. It is a list of\n\ 2806 directories, separated by colons. These directories are searched to find\n\ 2807 fully linked executable files and separately compiled object files as \ 2808 needed.")); 2809 set_cmd_completer (c, filename_completer); 2810 2811 c = add_cmd ("paths", no_class, path_info, _("\ 2812 Current search path for finding object files.\n\ 2813 $cwd in the path means the current working directory.\n\ 2814 This path is equivalent to the $PATH shell variable. It is a list of\n\ 2815 directories, separated by colons. These directories are searched to find\n\ 2816 fully linked executable files and separately compiled object files as \ 2817 needed."), 2818 &showlist); 2819 set_cmd_completer (c, noop_completer); 2820 2821 add_prefix_cmd ("kill", class_run, kill_command, 2822 _("Kill execution of program being debugged."), 2823 &killlist, "kill ", 0, &cmdlist); 2824 2825 add_com ("attach", class_run, attach_command, _("\ 2826 Attach to a process or file outside of GDB.\n\ 2827 This command attaches to another target, of the same type as your last\n\ 2828 \"target\" command (\"info files\" will show your target stack).\n\ 2829 The command may take as argument a process id or a device file.\n\ 2830 For a process id, you must have permission to send the process a signal,\n\ 2831 and it must have the same effective uid as the debugger.\n\ 2832 When using \"attach\" with a process id, the debugger finds the\n\ 2833 program running in the process, looking first in the current working\n\ 2834 directory, or (if not found there) using the source file search path\n\ 2835 (see the \"directory\" command). You can also use the \"file\" command\n\ 2836 to specify the program, and to load its symbol table.")); 2837 2838 add_prefix_cmd ("detach", class_run, detach_command, _("\ 2839 Detach a process or file previously attached.\n\ 2840 If a process, it is no longer traced, and it continues its execution. If\n\ 2841 you were debugging a file, the file is closed and gdb no longer accesses it."), 2842 &detachlist, "detach ", 0, &cmdlist); 2843 2844 add_com ("disconnect", class_run, disconnect_command, _("\ 2845 Disconnect from a target.\n\ 2846 The target will wait for another debugger to connect. Not available for\n\ 2847 all targets.")); 2848 2849 add_com ("signal", class_run, signal_command, _("\ 2850 Continue program giving it signal specified by the argument.\n\ 2851 An argument of \"0\" means continue program without giving it a signal.")); 2852 2853 add_com ("stepi", class_run, stepi_command, _("\ 2854 Step one instruction exactly.\n\ 2855 Argument N means do this N times (or till program stops for another \ 2856 reason).")); 2857 add_com_alias ("si", "stepi", class_alias, 0); 2858 2859 add_com ("nexti", class_run, nexti_command, _("\ 2860 Step one instruction, but proceed through subroutine calls.\n\ 2861 Argument N means do this N times (or till program stops for another \ 2862 reason).")); 2863 add_com_alias ("ni", "nexti", class_alias, 0); 2864 2865 add_com ("finish", class_run, finish_command, _("\ 2866 Execute until selected stack frame returns.\n\ 2867 Upon return, the value returned is printed and put in the value history.")); 2868 add_com_alias ("fin", "finish", class_run, 1); 2869 2870 add_com ("next", class_run, next_command, _("\ 2871 Step program, proceeding through subroutine calls.\n\ 2872 Like the \"step\" command as long as subroutine calls do not happen;\n\ 2873 when they do, the call is treated as one instruction.\n\ 2874 Argument N means do this N times (or till program stops for another \ 2875 reason).")); 2876 add_com_alias ("n", "next", class_run, 1); 2877 if (xdb_commands) 2878 add_com_alias ("S", "next", class_run, 1); 2879 2880 add_com ("step", class_run, step_command, _("\ 2881 Step program until it reaches a different source line.\n\ 2882 Argument N means do this N times (or till program stops for another \ 2883 reason).")); 2884 add_com_alias ("s", "step", class_run, 1); 2885 2886 c = add_com ("until", class_run, until_command, _("\ 2887 Execute until the program reaches a source line greater than the current\n\ 2888 or a specified location (same args as break command) within the current \ 2889 frame.")); 2890 set_cmd_completer (c, location_completer); 2891 add_com_alias ("u", "until", class_run, 1); 2892 2893 c = add_com ("advance", class_run, advance_command, _("\ 2894 Continue the program up to the given location (same form as args for break \ 2895 command).\n\ 2896 Execution will also stop upon exit from the current stack frame.")); 2897 set_cmd_completer (c, location_completer); 2898 2899 c = add_com ("jump", class_run, jump_command, _("\ 2900 Continue program being debugged at specified line or address.\n\ 2901 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\ 2902 for an address to start at.")); 2903 set_cmd_completer (c, location_completer); 2904 2905 if (xdb_commands) 2906 { 2907 c = add_com ("go", class_run, go_command, _("\ 2908 Usage: go <location>\n\ 2909 Continue program being debugged, stopping at specified line or \n\ 2910 address.\n\ 2911 Give as argument either LINENUM or *ADDR, where ADDR is an \n\ 2912 expression for an address to start at.\n\ 2913 This command is a combination of tbreak and jump.")); 2914 set_cmd_completer (c, location_completer); 2915 } 2916 2917 if (xdb_commands) 2918 add_com_alias ("g", "go", class_run, 1); 2919 2920 add_com ("continue", class_run, continue_command, _("\ 2921 Continue program being debugged, after signal or breakpoint.\n\ 2922 If proceeding from breakpoint, a number N may be used as an argument,\n\ 2923 which means to set the ignore count of that breakpoint to N - 1 (so that\n\ 2924 the breakpoint won't break until the Nth time it is reached).\n\ 2925 \n\ 2926 If non-stop mode is enabled, continue only the current thread,\n\ 2927 otherwise all the threads in the program are continued. To \n\ 2928 continue all stopped threads in non-stop mode, use the -a option.\n\ 2929 Specifying -a and an ignore count simultaneously is an error.")); 2930 add_com_alias ("c", "cont", class_run, 1); 2931 add_com_alias ("fg", "cont", class_run, 1); 2932 2933 c = add_com ("run", class_run, run_command, _("\ 2934 Start debugged program. You may specify arguments to give it.\n\ 2935 Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\ 2936 Input and output redirection with \">\", \"<\", or \">>\" are also \ 2937 allowed.\n\n\ 2938 With no arguments, uses arguments last specified (with \"run\" \ 2939 or \"set args\").\n\ 2940 To cancel previous arguments and run with no arguments,\n\ 2941 use \"set args\" without arguments.")); 2942 set_cmd_completer (c, filename_completer); 2943 add_com_alias ("r", "run", class_run, 1); 2944 if (xdb_commands) 2945 add_com ("R", class_run, run_no_args_command, 2946 _("Start debugged program with no arguments.")); 2947 2948 c = add_com ("start", class_run, start_command, _("\ 2949 Run the debugged program until the beginning of the main procedure.\n\ 2950 You may specify arguments to give to your program, just as with the\n\ 2951 \"run\" command.")); 2952 set_cmd_completer (c, filename_completer); 2953 2954 add_com ("interrupt", class_run, interrupt_target_command, 2955 _("Interrupt the execution of the debugged program.\n\ 2956 If non-stop mode is enabled, interrupt only the current thread,\n\ 2957 otherwise all the threads in the program are stopped. To \n\ 2958 interrupt all running threads in non-stop mode, use the -a option.")); 2959 2960 add_info ("registers", nofp_registers_info, _("\ 2961 List of integer registers and their contents, for selected stack frame.\n\ 2962 Register name as argument means describe only that register.")); 2963 add_info_alias ("r", "registers", 1); 2964 2965 if (xdb_commands) 2966 add_com ("lr", class_info, nofp_registers_info, _("\ 2967 List of integer registers and their contents, for selected stack frame.\n\ 2968 Register name as argument means describe only that register.")); 2969 add_info ("all-registers", all_registers_info, _("\ 2970 List of all registers and their contents, for selected stack frame.\n\ 2971 Register name as argument means describe only that register.")); 2972 2973 add_info ("program", program_info, 2974 _("Execution status of the program.")); 2975 2976 add_info ("float", float_info, 2977 _("Print the status of the floating point unit\n")); 2978 2979 add_info ("vector", vector_info, 2980 _("Print the status of the vector unit\n")); 2981 } 2982