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 PARAMS ((void));
  39
  40 static void maintenance_command PARAMS ((char *, int));
  41
  42 static void maintenance_dump_me PARAMS ((char *, int));
  43
  44 static void maintenance_internal_error PARAMS ((char *args, int from_tty));
  45
  46 static void maintenance_demangle PARAMS ((char *, int));
  47
  48 static void maintenance_time_display PARAMS ((char *, int));
  49
  50 static void maintenance_space_display PARAMS ((char *, int));
  51
  52 static void maintenance_info_command PARAMS ((char *, int));
  53
  54 static void print_section_table PARAMS ((bfd *, asection *, PTR));
  55
  56 static void maintenance_info_sections PARAMS ((char *, int));
  57
  58 static void maintenance_print_command PARAMS ((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 /* The "maintenance print" command is defined as a prefix, with
 287    allow_unknown 0.  Therefore, its own definition is called only for
 288    "maintenance print" with no args.  */
 289
 290 /* ARGSUSED */
 291 static void
 292 maintenance_print_command (arg, from_tty)
 293      char *arg;
 294      int from_tty;
 295 {
 296   printf_unfiltered ("\"maintenance print\" must be followed by the name of a print command.\n");
 297   help_list (maintenanceprintlist, "maintenance print ", -1, gdb_stdout);
 298 }
 299
 300 /* The "maintenance translate-address" command converts a section and address
 301    to a symbol.  This can be called in two ways:
 302    maintenance translate-address <secname> <addr>
 303    or   maintenance translate-address <addr>
 304  */
 305
 306 static void
 307 maintenance_translate_address (arg, from_tty)
 308      char *arg;
 309      int from_tty;
 310 {
 311   CORE_ADDR address;
 312   asection *sect;
 313   char *p;
 314   struct minimal_symbol *sym;
 315   struct objfile *objfile;
 316
 317   if (arg == NULL || *arg == 0)
 318     error ("requires argument (address or section + address)");
 319
 320   sect = NULL;
 321   p = arg;
 322
 323   if (!isdigit (*p))
 324     {                           /* See if we have a valid section name */
 325       while (*p && !isspace (*p))       /* Find end of section name */
 326         p++;
 327       if (*p == '\000')         /* End of command? */
 328         error ("Need to specify <section-name> and <address>");
 329       *p++ = '\000';
 330       while (isspace (*p))
 331         p++;                    /* Skip whitespace */
 332
 333       ALL_OBJFILES (objfile)
 334       {
 335         sect = bfd_get_section_by_name (objfile->obfd, arg);
 336         if (sect != NULL)
 337           break;
 338       }
 339
 340       if (!sect)
 341         error ("Unknown section %s.", arg);
 342     }
 343
 344   address = parse_and_eval_address (p);
 345
 346   if (sect)
 347     sym = lookup_minimal_symbol_by_pc_section (address, sect);
 348   else
 349     sym = lookup_minimal_symbol_by_pc (address);
 350
 351   if (sym)
 352     printf_filtered ("%s+%s\n",
 353                      SYMBOL_SOURCE_NAME (sym),
 354                      paddr_u (address - SYMBOL_VALUE_ADDRESS (sym)));
 355   else if (sect)
 356     printf_filtered ("no symbol at %s:0x%s\n", sect->name, paddr (address));
 357   else
 358     printf_filtered ("no symbol at 0x%s\n", paddr (address));
 359
 360   return;
 361 }
 362
 363
 364 /* When a comamnd is deprecated the user will be warned the first time
 365    the command is used.  If possible, a replacement will be
 366    offered. */
 367
 368 static void
 369 maintenance_deprecate (char *args, int from_tty)
 370 {
 371   if (args == NULL || *args == '\0')
 372     {
 373       printf_unfiltered ("\"maintenance deprecate\" takes an argument, \n\
 374 the command you want to deprecate, and optionally the replacement command \n\
 375 enclosed in quotes.\n");
 376     }
 377
 378   maintenance_do_deprecate (args, 1);
 379
 380 }
 381
 382
 383 static void
 384 maintenance_undeprecate (char *args, int from_tty)
 385 {
 386   if (args == NULL || *args == '\0')
 387     {
 388       printf_unfiltered ("\"maintenance undeprecate\" takes an argument, \n\
 389 the command you want to undeprecate.\n");
 390     }
 391
 392   maintenance_do_deprecate (args, 0);
 393
 394 }
 395
 396 /* You really shouldn't be using this. It is just for the testsuite.
 397    Rather, you should use deprecate_cmd() when the command is created
 398    in _initialize_blah().
 399
 400    This function deprecates a command and optionally assigns it a
 401    replacement.  */
 402
 403 static void
 404 maintenance_do_deprecate (char *text, int deprecate)
 405 {
 406
 407   struct cmd_list_element *alias = NULL;
 408   struct cmd_list_element *prefix_cmd = NULL;
 409   struct cmd_list_element *cmd = NULL;
 410
 411   char *start_ptr = NULL;
 412   char *end_ptr = NULL;
 413   int len;
 414   char *replacement = NULL;
 415
 416   if (text == NULL)
 417     return;
 418
 419   if (!lookup_cmd_composition (text, &alias, &prefix_cmd, &cmd))
 420     {
 421       printf_filtered ("Can't find command '%s' to deprecate.\n", text);
 422       return;
 423     }
 424
 425   if (deprecate)
 426     {
 427       /* look for a replacement command */
 428       start_ptr = strchr (text, '\"');
 429       if (start_ptr != NULL)
 430         {
 431           start_ptr++;
 432           end_ptr = strrchr (start_ptr, '\"');
 433           if (end_ptr != NULL)
 434             {
 435               len = end_ptr - start_ptr;
 436               start_ptr[len] = '\0';
 437               replacement = xstrdup (start_ptr);
 438             }
 439         }
 440     }
 441
 442   if (!start_ptr || !end_ptr)
 443     replacement = NULL;
 444
 445
 446   /* If they used an alias, we only want to deprecate the alias.
 447
 448      Note the MALLOCED_REPLACEMENT test.  If the command's replacement
 449      string was allocated at compile time we don't want to free the
 450      memory. */
 451   if (alias)
 452     {
 453
 454       if (alias->flags & MALLOCED_REPLACEMENT)
 455         free (alias->replacement);
 456
 457       if (deprecate)
 458         alias->flags |= (DEPRECATED_WARN_USER | CMD_DEPRECATED);
 459       else
 460         alias->flags &= ~(DEPRECATED_WARN_USER | CMD_DEPRECATED);
 461       alias->replacement = replacement;
 462       alias->flags |= MALLOCED_REPLACEMENT;
 463       return;
 464     }
 465   else if (cmd)
 466     {
 467       if (cmd->flags & MALLOCED_REPLACEMENT)
 468         free (cmd->replacement);
 469
 470       if (deprecate)
 471         cmd->flags |= (DEPRECATED_WARN_USER | CMD_DEPRECATED);
 472       else
 473         cmd->flags &= ~(DEPRECATED_WARN_USER | CMD_DEPRECATED);
 474       cmd->replacement = replacement;
 475       cmd->flags |= MALLOCED_REPLACEMENT;
 476       return;
 477     }
 478 }
 479
 480
 481 void
 482 _initialize_maint_cmds ()
 483 {
 484   add_prefix_cmd ("maintenance", class_maintenance, maintenance_command,
 485                   "Commands for use by GDB maintainers.\n\
 486 Includes commands to dump specific internal GDB structures in\n\
 487 a human readable form, to cause GDB to deliberately dump core,\n\
 488 to test internal functions such as the C++ demangler, etc.",
 489                   &maintenancelist, "maintenance ", 0,
 490                   &cmdlist);
 491
 492   add_com_alias ("mt", "maintenance", class_maintenance, 1);
 493
 494   add_prefix_cmd ("info", class_maintenance, maintenance_info_command,
 495      "Commands for showing internal info about the program being debugged.",
 496                   &maintenanceinfolist, "maintenance info ", 0,
 497                   &maintenancelist);
 498
 499   add_cmd ("sections", class_maintenance, maintenance_info_sections,
 500            "List the BFD sections of the exec and core files.",
 501            &maintenanceinfolist);
 502
 503   add_prefix_cmd ("print", class_maintenance, maintenance_print_command,
 504                   "Maintenance command for printing GDB internal state.",
 505                   &maintenanceprintlist, "maintenance print ", 0,
 506                   &maintenancelist);
 507
 508 #ifndef _WIN32
 509   add_cmd ("dump-me", class_maintenance, maintenance_dump_me,
 510            "Get fatal error; make debugger dump its core.\n\
 511 GDB sets it's handling of SIGQUIT back to SIG_DFL and then sends\n\
 512 itself a SIGQUIT signal.",
 513            &maintenancelist);
 514 #endif
 515
 516   add_cmd ("internal-error", class_maintenance, maintenance_internal_error,
 517            "Give GDB an internal error.\n\
 518 Cause GDB to behave as if an internal error was detected.",
 519            &maintenancelist);
 520
 521   add_cmd ("demangle", class_maintenance, maintenance_demangle,
 522            "Demangle a C++ mangled name.\n\
 523 Call internal GDB demangler routine to demangle a C++ link name\n\
 524 and prints the result.",
 525            &maintenancelist);
 526
 527   add_cmd ("time", class_maintenance, maintenance_time_display,
 528            "Set the display of time usage.\n\
 529 If nonzero, will cause the execution time for each command to be\n\
 530 displayed, following the command's output.",
 531            &maintenancelist);
 532
 533   add_cmd ("space", class_maintenance, maintenance_space_display,
 534            "Set the display of space usage.\n\
 535 If nonzero, will cause the execution space for each command to be\n\
 536 displayed, following the command's output.",
 537            &maintenancelist);
 538
 539   add_cmd ("type", class_maintenance, maintenance_print_type,
 540            "Print a type chain for a given symbol.\n\
 541 For each node in a type chain, print the raw data for each member of\n\
 542 the type structure, and the interpretation of the data.",
 543            &maintenanceprintlist);
 544
 545   add_cmd ("symbols", class_maintenance, maintenance_print_symbols,
 546            "Print dump of current symbol definitions.\n\
 547 Entries in the full symbol table are dumped to file OUTFILE.\n\
 548 If a SOURCE file is specified, dump only that file's symbols.",
 549            &maintenanceprintlist);
 550
 551   add_cmd ("msymbols", class_maintenance, maintenance_print_msymbols,
 552            "Print dump of current minimal symbol definitions.\n\
 553 Entries in the minimal symbol table are dumped to file OUTFILE.\n\
 554 If a SOURCE file is specified, dump only that file's minimal symbols.",
 555            &maintenanceprintlist);
 556
 557   add_cmd ("psymbols", class_maintenance, maintenance_print_psymbols,
 558            "Print dump of current partial symbol definitions.\n\
 559 Entries in the partial symbol table are dumped to file OUTFILE.\n\
 560 If a SOURCE file is specified, dump only that file's partial symbols.",
 561            &maintenanceprintlist);
 562
 563   add_cmd ("objfiles", class_maintenance, maintenance_print_objfiles,
 564            "Print dump of current object file definitions.",
 565            &maintenanceprintlist);
 566
 567   add_cmd ("statistics", class_maintenance, maintenance_print_statistics,
 568            "Print statistics about internal gdb state.",
 569            &maintenanceprintlist);
 570
 571   add_cmd ("check-symtabs", class_maintenance, maintenance_check_symtabs,
 572            "Check consistency of psymtabs and symtabs.",
 573            &maintenancelist);
 574
 575   add_cmd ("translate-address", class_maintenance, maintenance_translate_address,
 576            "Translate a section name and address to a symbol.",
 577            &maintenancelist);
 578
 579   add_cmd ("deprecate", class_maintenance, maintenance_deprecate,
 580            "Deprecate a command.  Note that this is just in here so the \n\
 581 testsuite can check the comamnd deprecator. You probably shouldn't use this,\n\
 582 rather you should use the C function deprecate_cmd().  If you decide you \n\
 583 want to use it: maintenance deprecate 'commandname' \"replacement\". The \n\
 584 replacement is optional.", &maintenancelist);
 585
 586   add_cmd ("undeprecate", class_maintenance, maintenance_undeprecate,
 587            "Undeprecate a command.  Note that this is just in here so the \n\
 588 testsuite can check the comamnd deprecator. You probably shouldn't use this,\n\
 589 If you decide you want to use it: maintenance undeprecate 'commandname'",
 590            &maintenancelist);
 591
 592   add_show_from_set (
 593                       add_set_cmd ("watchdog", class_maintenance, var_zinteger, (char *) &watchdog,
 594                                    "Set watchdog timer.\n\
 595 When non-zero, this timeout is used instead of waiting forever for a target to\n\
 596 finish a low-level step or continue operation.  If the specified amount of time\n\
 597 passes without a response from the target, an error occurs.", &setlist),
 598                       &showlist);
 599 }