gdb/maint.c

   1 /* Support for GDB maintenance commands.
   2    Copyright 1992, 1993, 1994 Free Software Foundation, Inc.
   3    Written by Fred Fish at Cygnus Support.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22
  23 #include "defs.h"
  24 #include <ctype.h>
  25 #include <signal.h>
  26 #include "command.h"
  27 #include "gdbcmd.h"
  28 #include "symtab.h"
  29 #include "gdbtypes.h"
  30 #include "demangle.h"
  31 #include "gdbcore.h"
  32 #include "expression.h"         /* For language.h */
  33 #include "language.h"
  34 #include "symfile.h"
  35 #include "objfiles.h"
  36 #include "value.h"
  37
  38 extern void _initialize_maint_cmds (void);
  39
  40 static void maintenance_command (char *, int);
  41
  42 static void maintenance_dump_me (char *, int);
  43
  44 static void maintenance_internal_error (char *args, int from_tty);
  45
  46 static void maintenance_demangle (char *, int);
  47
  48 static void maintenance_time_display (char *, int);
  49
  50 static void maintenance_space_display (char *, int);
  51
  52 static void maintenance_info_command (char *, int);
  53
  54 static void print_section_table (bfd *, asection *, PTR);
  55
  56 static void maintenance_info_sections (char *, int);
  57
  58 static void maintenance_print_command (char *, int);
  59
  60 static void maintenance_do_deprecate (char *, int);
  61
  62 /* Set this to the maximum number of seconds to wait instead of waiting forever
  63    in target_wait().  If this timer times out, then it generates an error and
  64    the command is aborted.  This replaces most of the need for timeouts in the
  65    GDB test suite, and makes it possible to distinguish between a hung target
  66    and one with slow communications.  */
  67
  68 int watchdog = 0;
  69
  70 /*
  71
  72    LOCAL FUNCTION
  73
  74    maintenance_command -- access the maintenance subcommands
  75
  76    SYNOPSIS
  77
  78    void maintenance_command (char *args, int from_tty)
  79
  80    DESCRIPTION
  81
  82  */
  83
  84 static void
  85 maintenance_command (args, from_tty)
  86      char *args;
  87      int from_tty;
  88 {
  89   printf_unfiltered ("\"maintenance\" must be followed by the name of a maintenance command.\n");
  90   help_list (maintenancelist, "maintenance ", -1, gdb_stdout);
  91 }
  92
  93 #ifndef _WIN32
  94 /* ARGSUSED */
  95 static void
  96 maintenance_dump_me (args, from_tty)
  97      char *args;
  98      int from_tty;
  99 {
 100   if (query ("Should GDB dump core? "))
 101     {
 102 #ifdef __DJGPP__
 103       /* SIGQUIT by default is ignored, so use SIGABRT instead.  */
 104       signal (SIGABRT, SIG_DFL);
 105       kill (getpid (), SIGABRT);
 106 #else
 107       signal (SIGQUIT, SIG_DFL);
 108       kill (getpid (), SIGQUIT);
 109 #endif
 110     }
 111 }
 112 #endif
 113
 114 /* Stimulate the internal error mechanism that GDB uses when an
 115    internal problem is detected.  Allows testing of the mechanism.
 116    Also useful when the user wants to drop a core file but not exit
 117    GDB. */
 118
 119 static void
 120 maintenance_internal_error (char *args, int from_tty)
 121 {
 122   internal_error ("internal maintenance");
 123 }
 124
 125 /* Someday we should allow demangling for things other than just
 126    explicit strings.  For example, we might want to be able to specify
 127    the address of a string in either GDB's process space or the
 128    debuggee's process space, and have gdb fetch and demangle that
 129    string.  If we have a char* pointer "ptr" that points to a string,
 130    we might want to be able to given just the name and have GDB
 131    demangle and print what it points to, etc.  (FIXME) */
 132
 133 static void
 134 maintenance_demangle (args, from_tty)
 135      char *args;
 136      int from_tty;
 137 {
 138   char *demangled;
 139
 140   if (args == NULL || *args == '\0')
 141     {
 142       printf_unfiltered ("\"maintenance demangle\" takes an argument to demangle.\n");
 143     }
 144   else
 145     {
 146       demangled = cplus_demangle (args, DMGL_ANSI | DMGL_PARAMS);
 147       if (demangled != NULL)
 148         {
 149           printf_unfiltered ("%s\n", demangled);
 150           free (demangled);
 151         }
 152       else
 153         {
 154           printf_unfiltered ("Can't demangle \"%s\"\n", args);
 155         }
 156     }
 157 }
 158
 159 static void
 160 maintenance_time_display (args, from_tty)
 161      char *args;
 162      int from_tty;
 163 {
 164   extern int display_time;
 165
 166   if (args == NULL || *args == '\0')
 167     printf_unfiltered ("\"maintenance time\" takes a numeric argument.\n");
 168   else
 169     display_time = strtol (args, NULL, 10);
 170 }
 171
 172 static void
 173 maintenance_space_display (args, from_tty)
 174      char *args;
 175      int from_tty;
 176 {
 177   extern int display_space;
 178
 179   if (args == NULL || *args == '\0')
 180     printf_unfiltered ("\"maintenance space\" takes a numeric argument.\n");
 181   else
 182     display_space = strtol (args, NULL, 10);
 183 }
 184
 185 /* The "maintenance info" command is defined as a prefix, with
 186    allow_unknown 0.  Therefore, its own definition is called only for
 187    "maintenance info" with no args.  */
 188
 189 /* ARGSUSED */
 190 static void
 191 maintenance_info_command (arg, from_tty)
 192      char *arg;
 193      int from_tty;
 194 {
 195   printf_unfiltered ("\"maintenance info\" must be followed by the name of an info command.\n");
 196   help_list (maintenanceinfolist, "maintenance info ", -1, gdb_stdout);
 197 }
 198
 199 static void
 200 print_section_table (abfd, asect, ignore)
 201      bfd *abfd;
 202      asection *asect;
 203      PTR ignore;
 204 {
 205   flagword flags;
 206
 207   flags = bfd_get_section_flags (abfd, asect);
 208
 209   /* FIXME-32x64: Need print_address_numeric with field width.  */
 210   printf_filtered ("    %s",
 211                    local_hex_string_custom
 212                    ((unsigned long) bfd_section_vma (abfd, asect), "08l"));
 213   printf_filtered ("->%s",
 214                    local_hex_string_custom
 215                    ((unsigned long) (bfd_section_vma (abfd, asect)
 216                                      + bfd_section_size (abfd, asect)),
 217                     "08l"));
 218   printf_filtered (" at %s",
 219                    local_hex_string_custom
 220                    ((unsigned long) asect->filepos, "08l"));
 221   printf_filtered (": %s", bfd_section_name (abfd, asect));
 222
 223   if (flags & SEC_ALLOC)
 224     printf_filtered (" ALLOC");
 225   if (flags & SEC_LOAD)
 226     printf_filtered (" LOAD");
 227   if (flags & SEC_RELOC)
 228     printf_filtered (" RELOC");
 229   if (flags & SEC_READONLY)
 230     printf_filtered (" READONLY");
 231   if (flags & SEC_CODE)
 232     printf_filtered (" CODE");
 233   if (flags & SEC_DATA)
 234     printf_filtered (" DATA");
 235   if (flags & SEC_ROM)
 236     printf_filtered (" ROM");
 237   if (flags & SEC_CONSTRUCTOR)
 238     printf_filtered (" CONSTRUCTOR");
 239   if (flags & SEC_HAS_CONTENTS)
 240     printf_filtered (" HAS_CONTENTS");
 241   if (flags & SEC_NEVER_LOAD)
 242     printf_filtered (" NEVER_LOAD");
 243   if (flags & SEC_COFF_SHARED_LIBRARY)
 244     printf_filtered (" COFF_SHARED_LIBRARY");
 245   if (flags & SEC_IS_COMMON)
 246     printf_filtered (" IS_COMMON");
 247
 248   printf_filtered ("\n");
 249 }
 250
 251 /* ARGSUSED */
 252 static void
 253 maintenance_info_sections (arg, from_tty)
 254      char *arg;
 255      int from_tty;
 256 {
 257   if (exec_bfd)
 258     {
 259       printf_filtered ("Exec file:\n");
 260       printf_filtered ("    `%s', ", bfd_get_filename (exec_bfd));
 261       wrap_here ("        ");
 262       printf_filtered ("file type %s.\n", bfd_get_target (exec_bfd));
 263       bfd_map_over_sections (exec_bfd, print_section_table, 0);
 264     }
 265
 266   if (core_bfd)
 267     {
 268       printf_filtered ("Core file:\n");
 269       printf_filtered ("    `%s', ", bfd_get_filename (core_bfd));
 270       wrap_here ("        ");
 271       printf_filtered ("file type %s.\n", bfd_get_target (core_bfd));
 272       bfd_map_over_sections (core_bfd, print_section_table, 0);
 273     }
 274 }
 275
 276 /* ARGSUSED */
 277 void
 278 maintenance_print_statistics (args, from_tty)
 279      char *args;
 280      int from_tty;
 281 {
 282   print_objfile_statistics ();
 283   print_symbol_bcache_statistics ();
 284 }
 285
 286 void
 287 maintenance_print_architecture (char *args, int from_tty)
 288 {
 289   if (args == NULL)
 290     gdbarch_dump (current_gdbarch, gdb_stdout);
 291   else
 292     {
 293       struct ui_file *file = gdb_fopen (args, "w");
 294       if (file == NULL)
 295         perror_with_name ("maintenance print architecture");
 296       gdbarch_dump (current_gdbarch, file);
 297       ui_file_delete (file);
 298     }
 299 }
 300
 301 /* The "maintenance print" command is defined as a prefix, with
 302    allow_unknown 0.  Therefore, its own definition is called only for
 303    "maintenance print" with no args.  */
 304
 305 /* ARGSUSED */
 306 static void
 307 maintenance_print_command (arg, from_tty)
 308      char *arg;
 309      int from_tty;
 310 {
 311   printf_unfiltered ("\"maintenance print\" must be followed by the name of a print command.\n");
 312   help_list (maintenanceprintlist, "maintenance print ", -1, gdb_stdout);
 313 }
 314
 315 /* The "maintenance translate-address" command converts a section and address
 316    to a symbol.  This can be called in two ways:
 317    maintenance translate-address <secname> <addr>
 318    or   maintenance translate-address <addr>
 319  */
 320
 321 static void
 322 maintenance_translate_address (arg, from_tty)
 323      char *arg;
 324      int from_tty;
 325 {
 326   CORE_ADDR address;
 327   asection *sect;
 328   char *p;
 329   struct minimal_symbol *sym;
 330   struct objfile *objfile;
 331
 332   if (arg == NULL || *arg == 0)
 333     error ("requires argument (address or section + address)");
 334
 335   sect = NULL;
 336   p = arg;
 337
 338   if (!isdigit (*p))
 339     {                           /* See if we have a valid section name */
 340       while (*p && !isspace (*p))       /* Find end of section name */
 341         p++;
 342       if (*p == '\000')         /* End of command? */
 343         error ("Need to specify <section-name> and <address>");
 344       *p++ = '\000';
 345       while (isspace (*p))
 346         p++;                    /* Skip whitespace */
 347
 348       ALL_OBJFILES (objfile)
 349       {
 350         sect = bfd_get_section_by_name (objfile->obfd, arg);
 351         if (sect != NULL)
 352           break;
 353       }
 354
 355       if (!sect)
 356         error ("Unknown section %s.", arg);
 357     }
 358
 359   address = parse_and_eval_address (p);
 360
 361   if (sect)
 362     sym = lookup_minimal_symbol_by_pc_section (address, sect);
 363   else
 364     sym = lookup_minimal_symbol_by_pc (address);
 365
 366   if (sym)
 367     printf_filtered ("%s+%s\n",
 368                      SYMBOL_SOURCE_NAME (sym),
 369                      paddr_u (address - SYMBOL_VALUE_ADDRESS (sym)));
 370   else if (sect)
 371     printf_filtered ("no symbol at %s:0x%s\n", sect->name, paddr (address));
 372   else
 373     printf_filtered ("no symbol at 0x%s\n", paddr (address));
 374
 375   return;
 376 }
 377
 378
 379 /* When a comamnd is deprecated the user will be warned the first time
 380    the command is used.  If possible, a replacement will be
 381    offered. */
 382
 383 static void
 384 maintenance_deprecate (char *args, int from_tty)
 385 {
 386   if (args == NULL || *args == '\0')
 387     {
 388       printf_unfiltered ("\"maintenance deprecate\" takes an argument, \n\
 389 the command you want to deprecate, and optionally the replacement command \n\
 390 enclosed in quotes.\n");
 391     }
 392
 393   maintenance_do_deprecate (args, 1);
 394
 395 }
 396
 397
 398 static void
 399 maintenance_undeprecate (char *args, int from_tty)
 400 {
 401   if (args == NULL || *args == '\0')
 402     {
 403       printf_unfiltered ("\"maintenance undeprecate\" takes an argument, \n\
 404 the command you want to undeprecate.\n");
 405     }
 406
 407   maintenance_do_deprecate (args, 0);
 408
 409 }
 410
 411 /* You really shouldn't be using this. It is just for the testsuite.
 412    Rather, you should use deprecate_cmd() when the command is created
 413    in _initialize_blah().
 414
 415    This function deprecates a command and optionally assigns it a
 416    replacement.  */
 417
 418 static void
 419 maintenance_do_deprecate (char *text, int deprecate)
 420 {
 421
 422   struct cmd_list_element *alias = NULL;
 423   struct cmd_list_element *prefix_cmd = NULL;
 424   struct cmd_list_element *cmd = NULL;
 425
 426   char *start_ptr = NULL;
 427   char *end_ptr = NULL;
 428   int len;
 429   char *replacement = NULL;
 430
 431   if (text == NULL)
 432     return;
 433
 434   if (!lookup_cmd_composition (text, &alias, &prefix_cmd, &cmd))
 435     {
 436       printf_filtered ("Can't find command '%s' to deprecate.\n", text);
 437       return;
 438     }
 439
 440   if (deprecate)
 441     {
 442       /* look for a replacement command */
 443       start_ptr = strchr (text, '\"');
 444       if (start_ptr != NULL)
 445         {
 446           start_ptr++;
 447           end_ptr = strrchr (start_ptr, '\"');
 448           if (end_ptr != NULL)
 449             {
 450               len = end_ptr - start_ptr;
 451               start_ptr[len] = '\0';
 452               replacement = xstrdup (start_ptr);
 453             }
 454         }
 455     }
 456
 457   if (!start_ptr || !end_ptr)
 458     replacement = NULL;
 459
 460
 461   /* If they used an alias, we only want to deprecate the alias.
 462
 463      Note the MALLOCED_REPLACEMENT test.  If the command's replacement
 464      string was allocated at compile time we don't want to free the
 465      memory. */
 466   if (alias)
 467     {
 468
 469       if (alias->flags & MALLOCED_REPLACEMENT)
 470         free (alias->replacement);
 471
 472       if (deprecate)
 473         alias->flags |= (DEPRECATED_WARN_USER | CMD_DEPRECATED);
 474       else
 475         alias->flags &= ~(DEPRECATED_WARN_USER | CMD_DEPRECATED);
 476       alias->replacement = replacement;
 477       alias->flags |= MALLOCED_REPLACEMENT;
 478       return;
 479     }
 480   else if (cmd)
 481     {
 482       if (cmd->flags & MALLOCED_REPLACEMENT)
 483         free (cmd->replacement);
 484
 485       if (deprecate)
 486         cmd->flags |= (DEPRECATED_WARN_USER | CMD_DEPRECATED);
 487       else
 488         cmd->flags &= ~(DEPRECATED_WARN_USER | CMD_DEPRECATED);
 489       cmd->replacement = replacement;
 490       cmd->flags |= MALLOCED_REPLACEMENT;
 491       return;
 492     }
 493 }
 494
 495
 496 void
 497 _initialize_maint_cmds ()
 498 {
 499   add_prefix_cmd ("maintenance", class_maintenance, maintenance_command,
 500                   "Commands for use by GDB maintainers.\n\
 501 Includes commands to dump specific internal GDB structures in\n\
 502 a human readable form, to cause GDB to deliberately dump core,\n\
 503 to test internal functions such as the C++ demangler, etc.",
 504                   &maintenancelist, "maintenance ", 0,
 505                   &cmdlist);
 506
 507   add_com_alias ("mt", "maintenance", class_maintenance, 1);
 508
 509   add_prefix_cmd ("info", class_maintenance, maintenance_info_command,
 510      "Commands for showing internal info about the program being debugged.",
 511                   &maintenanceinfolist, "maintenance info ", 0,
 512                   &maintenancelist);
 513   add_alias_cmd ("i", "info", class_maintenance, 1, &maintenancelist);
 514
 515   add_cmd ("sections", class_maintenance, maintenance_info_sections,
 516            "List the BFD sections of the exec and core files.",
 517            &maintenanceinfolist);
 518
 519   add_prefix_cmd ("print", class_maintenance, maintenance_print_command,
 520                   "Maintenance command for printing GDB internal state.",
 521                   &maintenanceprintlist, "maintenance print ", 0,
 522                   &maintenancelist);
 523
 524 #ifndef _WIN32
 525   add_cmd ("dump-me", class_maintenance, maintenance_dump_me,
 526            "Get fatal error; make debugger dump its core.\n\
 527 GDB sets it's handling of SIGQUIT back to SIG_DFL and then sends\n\
 528 itself a SIGQUIT signal.",
 529            &maintenancelist);
 530 #endif
 531
 532   add_cmd ("internal-error", class_maintenance, maintenance_internal_error,
 533            "Give GDB an internal error.\n\
 534 Cause GDB to behave as if an internal error was detected.",
 535            &maintenancelist);
 536
 537   add_cmd ("demangle", class_maintenance, maintenance_demangle,
 538            "Demangle a C++ mangled name.\n\
 539 Call internal GDB demangler routine to demangle a C++ link name\n\
 540 and prints the result.",
 541            &maintenancelist);
 542
 543   add_cmd ("time", class_maintenance, maintenance_time_display,
 544            "Set the display of time usage.\n\
 545 If nonzero, will cause the execution time for each command to be\n\
 546 displayed, following the command's output.",
 547            &maintenancelist);
 548
 549   add_cmd ("space", class_maintenance, maintenance_space_display,
 550            "Set the display of space usage.\n\
 551 If nonzero, will cause the execution space for each command to be\n\
 552 displayed, following the command's output.",
 553            &maintenancelist);
 554
 555   add_cmd ("type", class_maintenance, maintenance_print_type,
 556            "Print a type chain for a given symbol.\n\
 557 For each node in a type chain, print the raw data for each member of\n\
 558 the type structure, and the interpretation of the data.",
 559            &maintenanceprintlist);
 560
 561   add_cmd ("symbols", class_maintenance, maintenance_print_symbols,
 562            "Print dump of current symbol definitions.\n\
 563 Entries in the full symbol table are dumped to file OUTFILE.\n\
 564 If a SOURCE file is specified, dump only that file's symbols.",
 565            &maintenanceprintlist);
 566
 567   add_cmd ("msymbols", class_maintenance, maintenance_print_msymbols,
 568            "Print dump of current minimal symbol definitions.\n\
 569 Entries in the minimal symbol table are dumped to file OUTFILE.\n\
 570 If a SOURCE file is specified, dump only that file's minimal symbols.",
 571            &maintenanceprintlist);
 572
 573   add_cmd ("psymbols", class_maintenance, maintenance_print_psymbols,
 574            "Print dump of current partial symbol definitions.\n\
 575 Entries in the partial symbol table are dumped to file OUTFILE.\n\
 576 If a SOURCE file is specified, dump only that file's partial symbols.",
 577            &maintenanceprintlist);
 578
 579   add_cmd ("objfiles", class_maintenance, maintenance_print_objfiles,
 580            "Print dump of current object file definitions.",
 581            &maintenanceprintlist);
 582
 583   add_cmd ("statistics", class_maintenance, maintenance_print_statistics,
 584            "Print statistics about internal gdb state.",
 585            &maintenanceprintlist);
 586
 587   add_cmd ("architecture", class_maintenance, maintenance_print_architecture,
 588            "Print the internal architecture configuration.\
 589 Takes an optional file parameter.",
 590            &maintenanceprintlist);
 591
 592   add_cmd ("check-symtabs", class_maintenance, maintenance_check_symtabs,
 593            "Check consistency of psymtabs and symtabs.",
 594            &maintenancelist);
 595
 596   add_cmd ("translate-address", class_maintenance, maintenance_translate_address,
 597            "Translate a section name and address to a symbol.",
 598            &maintenancelist);
 599
 600   add_cmd ("deprecate", class_maintenance, maintenance_deprecate,
 601            "Deprecate a command.  Note that this is just in here so the \n\
 602 testsuite can check the comamnd deprecator. You probably shouldn't use this,\n\
 603 rather you should use the C function deprecate_cmd().  If you decide you \n\
 604 want to use it: maintenance deprecate 'commandname' \"replacement\". The \n\
 605 replacement is optional.", &maintenancelist);
 606
 607   add_cmd ("undeprecate", class_maintenance, maintenance_undeprecate,
 608            "Undeprecate a command.  Note that this is just in here so the \n\
 609 testsuite can check the comamnd deprecator. You probably shouldn't use this,\n\
 610 If you decide you want to use it: maintenance undeprecate 'commandname'",
 611            &maintenancelist);
 612
 613   add_show_from_set (
 614                       add_set_cmd ("watchdog", class_maintenance, var_zinteger, (char *) &watchdog,
 615                                    "Set watchdog timer.\n\
 616 When non-zero, this timeout is used instead of waiting forever for a target to\n\
 617 finish a low-level step or continue operation.  If the specified amount of time\n\
 618 passes without a response from the target, an error occurs.", &setlist),
 619                       &showlist);
 620 }