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, Boston, MA 02111-1307, USA.  */
  20
  21
  22 #include "defs.h"
  23
  24 #if MAINTENANCE_CMDS    /* Entire rest of file goes away if not including maint cmds */
  25
  26 #include <ctype.h>
  27 #include <signal.h>
  28 #include "command.h"
  29 #include "gdbcmd.h"
  30 #include "symtab.h"
  31 #include "gdbtypes.h"
  32 #include "demangle.h"
  33 #include "gdbcore.h"
  34 #include "expression.h" /* For language.h */
  35 #include "language.h"
  36 #include "symfile.h"
  37 #include "objfiles.h"
  38 #include "value.h"
  39
  40 #ifdef HAVE_UNISTD_H
  41 #include <unistd.h>
  42 #endif
  43
  44 static void maintenance_command PARAMS ((char *, int));
  45
  46 static void maintenance_dump_me PARAMS ((char *, int));
  47
  48 static void maintenance_demangle PARAMS ((char *, int));
  49
  50 static void maintenance_time_display PARAMS ((char *, int));
  51
  52 static void maintenance_space_display PARAMS ((char *, int));
  53
  54 static void maintenance_info_command PARAMS ((char *, int));
  55
  56 static void print_section_table PARAMS ((bfd *, asection *, PTR));
  57
  58 static void maintenance_info_sections PARAMS ((char *, int));
  59
  60 static void maintenance_print_command PARAMS ((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       signal (SIGQUIT, SIG_DFL);
 103       kill (getpid (), SIGQUIT);
 104     }
 105 }
 106 #endif
 107
 108 /*  Someday we should allow demangling for things other than just
 109     explicit strings.  For example, we might want to be able to
 110     specify the address of a string in either GDB's process space
 111     or the debuggee's process space, and have gdb fetch and demangle
 112     that string.  If we have a char* pointer "ptr" that points to
 113     a string, we might want to be able to given just the name and
 114     have GDB demangle and print what it points to, etc.  (FIXME) */
 115
 116 static void
 117 maintenance_demangle (args, from_tty)
 118      char *args;
 119      int from_tty;
 120 {
 121   char *demangled;
 122
 123   if (args == NULL || *args == '\0')
 124     {
 125       printf_unfiltered ("\"maintenance demangle\" takes an argument to demangle.\n");
 126     }
 127   else
 128     {
 129       demangled = cplus_demangle (args, DMGL_ANSI | DMGL_PARAMS);
 130       if (demangled != NULL)
 131         {
 132           printf_unfiltered ("%s\n", demangled);
 133           free (demangled);
 134         }
 135       else
 136         {
 137           printf_unfiltered ("Can't demangle \"%s\"\n", args);
 138         }
 139     }
 140 }
 141
 142 static void
 143 maintenance_time_display (args, from_tty)
 144      char *args;
 145      int from_tty;
 146 {
 147   extern int display_time;
 148
 149   if (args == NULL || *args == '\0')
 150     printf_unfiltered ("\"maintenance time\" takes a numeric argument.\n");
 151   else
 152     display_time = strtol (args, NULL, 10);
 153 }
 154
 155 static void
 156 maintenance_space_display (args, from_tty)
 157      char *args;
 158      int from_tty;
 159 {
 160   extern int display_space;
 161
 162   if (args == NULL || *args == '\0')
 163     printf_unfiltered ("\"maintenance space\" takes a numeric argument.\n");
 164   else
 165     display_space = strtol (args, NULL, 10);
 166 }
 167
 168 /* The "maintenance info" command is defined as a prefix, with allow_unknown 0.
 169    Therefore, its own definition is called only for "maintenance info" with
 170    no args.  */
 171
 172 /* ARGSUSED */
 173 static void
 174 maintenance_info_command (arg, from_tty)
 175      char *arg;
 176      int from_tty;
 177 {
 178   printf_unfiltered ("\"maintenance info\" must be followed by the name of an info command.\n");
 179   help_list (maintenanceinfolist, "maintenance info ", -1, gdb_stdout);
 180 }
 181
 182 static void
 183 print_section_table (abfd, asect, ignore)
 184      bfd *abfd;
 185      asection *asect;
 186      PTR ignore;
 187 {
 188   flagword flags;
 189
 190   flags = bfd_get_section_flags (abfd, asect);
 191
 192   /* FIXME-32x64: Need print_address_numeric with field width.  */
 193   printf_filtered ("    %s",
 194                    local_hex_string_custom
 195                      ((unsigned long) bfd_section_vma (abfd, asect), "08l"));
 196   printf_filtered ("->%s",
 197                    local_hex_string_custom
 198                      ((unsigned long) (bfd_section_vma (abfd, asect)
 199                                        + bfd_section_size (abfd, asect)),
 200                       "08l"));
 201   printf_filtered (" at %s",
 202                    local_hex_string_custom
 203                      ((unsigned long) asect->filepos, "08l"));
 204   printf_filtered (": %s", bfd_section_name (abfd, asect));
 205
 206   if (flags & SEC_ALLOC)
 207     printf_filtered (" ALLOC");
 208   if (flags & SEC_LOAD)
 209     printf_filtered (" LOAD");
 210   if (flags & SEC_RELOC)
 211     printf_filtered (" RELOC");
 212   if (flags & SEC_READONLY)
 213     printf_filtered (" READONLY");
 214   if (flags & SEC_CODE)
 215     printf_filtered (" CODE");
 216   if (flags & SEC_DATA)
 217     printf_filtered (" DATA");
 218   if (flags & SEC_ROM)
 219     printf_filtered (" ROM");
 220   if (flags & SEC_CONSTRUCTOR)
 221     printf_filtered (" CONSTRUCTOR");
 222   if (flags & SEC_HAS_CONTENTS)
 223     printf_filtered (" HAS_CONTENTS");
 224   if (flags & SEC_NEVER_LOAD)
 225     printf_filtered (" NEVER_LOAD");
 226   if (flags & SEC_COFF_SHARED_LIBRARY)
 227     printf_filtered (" COFF_SHARED_LIBRARY");
 228   if (flags & SEC_IS_COMMON)
 229     printf_filtered (" IS_COMMON");
 230
 231   printf_filtered ("\n");
 232 }
 233
 234 /* ARGSUSED */
 235 static void
 236 maintenance_info_sections (arg, from_tty)
 237      char *arg;
 238      int from_tty;
 239 {
 240   if (exec_bfd)
 241     {
 242       printf_filtered ("Exec file:\n");
 243       printf_filtered ("    `%s', ", bfd_get_filename(exec_bfd));
 244       wrap_here ("        ");
 245       printf_filtered ("file type %s.\n", bfd_get_target(exec_bfd));
 246       bfd_map_over_sections(exec_bfd, print_section_table, 0);
 247     }
 248
 249   if (core_bfd)
 250     {
 251       printf_filtered ("Core file:\n");
 252       printf_filtered ("    `%s', ", bfd_get_filename(core_bfd));
 253       wrap_here ("        ");
 254       printf_filtered ("file type %s.\n", bfd_get_target(core_bfd));
 255       bfd_map_over_sections(core_bfd, print_section_table, 0);
 256     }
 257 }
 258
 259 /* ARGSUSED */
 260 void
 261 maintenance_print_statistics (args, from_tty)
 262      char *args;
 263      int from_tty;
 264 {
 265   print_objfile_statistics ();
 266   print_symbol_bcache_statistics ();
 267 }
 268
 269 /* The "maintenance print" command is defined as a prefix, with allow_unknown
 270    0.  Therefore, its own definition is called only for "maintenance print"
 271    with no args.  */
 272
 273 /* ARGSUSED */
 274 static void
 275 maintenance_print_command (arg, from_tty)
 276      char *arg;
 277      int from_tty;
 278 {
 279   printf_unfiltered ("\"maintenance print\" must be followed by the name of a print command.\n");
 280   help_list (maintenanceprintlist, "maintenance print ", -1, gdb_stdout);
 281 }
 282
 283 /* The "maintenance translate-address" command converts a section and address
 284    to a symbol.  This can be called in two ways:
 285                 maintenance translate-address <secname> <addr>
 286         or      maintenance translate-address <addr>
 287 */
 288
 289 static void
 290 maintenance_translate_address (arg, from_tty)
 291      char *arg;
 292      int from_tty;
 293 {
 294   CORE_ADDR address;
 295   asection *sect;
 296   char *p;
 297   struct minimal_symbol *sym;
 298   struct objfile *objfile;
 299
 300   if (arg == NULL || *arg == 0)
 301     error ("requires argument (address or section + address)");
 302
 303   sect = NULL;
 304   p = arg;
 305
 306   if (!isdigit (*p))
 307     {                           /* See if we have a valid section name */
 308       while (*p && !isspace (*p)) /* Find end of section name */
 309         p++;
 310       if (*p == '\000')         /* End of command? */
 311         error ("Need to specify <section-name> and <address>");
 312       *p++ = '\000';
 313       while (isspace (*p)) p++; /* Skip whitespace */
 314
 315       ALL_OBJFILES (objfile)
 316         {
 317           sect = bfd_get_section_by_name (objfile->obfd, arg);
 318           if (sect != NULL)
 319             break;
 320         }
 321
 322       if (!sect)
 323         error ("Unknown section %s.", arg);
 324     }
 325
 326   address = parse_and_eval_address (p);
 327
 328   if (sect)
 329     sym = lookup_minimal_symbol_by_pc_section (address, sect);
 330   else
 331     sym = lookup_minimal_symbol_by_pc (address);
 332
 333   if (sym)
 334     printf_filtered ("%s+%u\n",
 335                      SYMBOL_SOURCE_NAME (sym),
 336                      address - SYMBOL_VALUE_ADDRESS (sym));
 337   else if (sect)
 338     printf_filtered ("no symbol at %s:0x%08x\n", sect->name, address);
 339   else
 340     printf_filtered ("no symbol at 0x%08x\n", address);
 341
 342   return;
 343 }
 344
 345 #endif  /* MAINTENANCE_CMDS */
 346
 347 void
 348 _initialize_maint_cmds ()
 349 {
 350 #if MAINTENANCE_CMDS    /* Entire file goes away if not including maint cmds */
 351   add_prefix_cmd ("maintenance", class_maintenance, maintenance_command,
 352                   "Commands for use by GDB maintainers.\n\
 353 Includes commands to dump specific internal GDB structures in\n\
 354 a human readable form, to cause GDB to deliberately dump core,\n\
 355 to test internal functions such as the C++ demangler, etc.",
 356                   &maintenancelist, "maintenance ", 0,
 357                   &cmdlist);
 358
 359   add_com_alias ("mt", "maintenance", class_maintenance, 1);
 360
 361   add_prefix_cmd ("info", class_maintenance, maintenance_info_command,
 362                   "Commands for showing internal info about the program being debugged.",
 363                   &maintenanceinfolist, "maintenance info ", 0,
 364                   &maintenancelist);
 365
 366   add_cmd ("sections", class_maintenance, maintenance_info_sections,
 367            "List the BFD sections of the exec and core files.",
 368            &maintenanceinfolist);
 369
 370   add_prefix_cmd ("print", class_maintenance, maintenance_print_command,
 371                   "Maintenance command for printing GDB internal state.",
 372                   &maintenanceprintlist, "maintenance print ", 0,
 373                   &maintenancelist);
 374
 375 #ifndef _WIN32
 376   add_cmd ("dump-me", class_maintenance, maintenance_dump_me,
 377            "Get fatal error; make debugger dump its core.\n\
 378 GDB sets it's handling of SIGQUIT back to SIG_DFL and then sends\n\
 379 itself a SIGQUIT signal.",
 380            &maintenancelist);
 381 #endif
 382
 383   add_cmd ("demangle", class_maintenance, maintenance_demangle,
 384            "Demangle a C++ mangled name.\n\
 385 Call internal GDB demangler routine to demangle a C++ link name\n\
 386 and prints the result.",
 387            &maintenancelist);
 388
 389   add_cmd ("time", class_maintenance, maintenance_time_display,
 390            "Set the display of time usage.\n\
 391 If nonzero, will cause the execution time for each command to be\n\
 392 displayed, following the command's output.",
 393            &maintenancelist);
 394
 395   add_cmd ("space", class_maintenance, maintenance_space_display,
 396            "Set the display of space usage.\n\
 397 If nonzero, will cause the execution space for each command to be\n\
 398 displayed, following the command's output.",
 399            &maintenancelist);
 400
 401   add_cmd ("type", class_maintenance, maintenance_print_type,
 402            "Print a type chain for a given symbol.\n\
 403 For each node in a type chain, print the raw data for each member of\n\
 404 the type structure, and the interpretation of the data.",
 405            &maintenanceprintlist);
 406
 407   add_cmd ("symbols", class_maintenance, maintenance_print_symbols,
 408            "Print dump of current symbol definitions.\n\
 409 Entries in the full symbol table are dumped to file OUTFILE.\n\
 410 If a SOURCE file is specified, dump only that file's symbols.",
 411            &maintenanceprintlist);
 412
 413   add_cmd ("msymbols", class_maintenance, maintenance_print_msymbols,
 414            "Print dump of current minimal symbol definitions.\n\
 415 Entries in the minimal symbol table are dumped to file OUTFILE.\n\
 416 If a SOURCE file is specified, dump only that file's minimal symbols.",
 417            &maintenanceprintlist);
 418
 419   add_cmd ("psymbols", class_maintenance, maintenance_print_psymbols,
 420            "Print dump of current partial symbol definitions.\n\
 421 Entries in the partial symbol table are dumped to file OUTFILE.\n\
 422 If a SOURCE file is specified, dump only that file's partial symbols.",
 423            &maintenanceprintlist);
 424
 425   add_cmd ("objfiles", class_maintenance, maintenance_print_objfiles,
 426            "Print dump of current object file definitions.",
 427            &maintenanceprintlist);
 428
 429   add_cmd ("statistics", class_maintenance, maintenance_print_statistics,
 430            "Print statistics about internal gdb state.",
 431            &maintenanceprintlist);
 432
 433   add_cmd ("check-symtabs", class_maintenance, maintenance_check_symtabs,
 434            "Check consistency of psymtabs and symtabs.",
 435            &maintenancelist);
 436
 437   add_cmd ("translate-address", class_maintenance, maintenance_translate_address,
 438            "Translate a section name and address to a symbol.",
 439            &maintenancelist);
 440
 441   add_show_from_set (
 442     add_set_cmd ("watchdog", class_maintenance, var_zinteger, (char *)&watchdog,
 443                  "Set watchdog timer.\n\
 444 When non-zero, this timeout is used instead of waiting forever for a target to\n\
 445 finish a low-level step or continue operation.  If the specified amount of time\n\
 446 passes without a response from the target, an error occurs.", &setlist),
 447                      &showlist);
 448 #endif  /* MAINTENANCE_CMDS */
 449 }