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 #include <ctype.h>
  24 #include <signal.h>
  25 #include "command.h"
  26 #include "gdbcmd.h"
  27 #include "symtab.h"
  28 #include "gdbtypes.h"
  29 #include "demangle.h"
  30 #include "gdbcore.h"
  31 #include "expression.h" /* For language.h */
  32 #include "language.h"
  33 #include "symfile.h"
  34 #include "objfiles.h"
  35 #include "value.h"
  36
  37 #ifdef HAVE_UNISTD_H
  38 #include <unistd.h>
  39 #endif
  40
  41 extern void _initialize_maint_cmds PARAMS ((void));
  42
  43 static void maintenance_command PARAMS ((char *, int));
  44
  45 static void maintenance_dump_me PARAMS ((char *, int));
  46
  47 static void maintenance_demangle PARAMS ((char *, int));
  48
  49 static void maintenance_time_display PARAMS ((char *, int));
  50
  51 static void maintenance_space_display PARAMS ((char *, int));
  52
  53 static void maintenance_info_command PARAMS ((char *, int));
  54
  55 static void print_section_table PARAMS ((bfd *, asection *, PTR));
  56
  57 static void maintenance_info_sections PARAMS ((char *, int));
  58
  59 static void maintenance_print_command PARAMS ((char *, int));
  60
  61 /* Set this to the maximum number of seconds to wait instead of waiting forever
  62    in target_wait().  If this timer times out, then it generates an error and
  63    the command is aborted.  This replaces most of the need for timeouts in the
  64    GDB test suite, and makes it possible to distinguish between a hung target
  65    and one with slow communications.  */
  66
  67 int watchdog = 0;
  68
  69 /*
  70
  71 LOCAL FUNCTION
  72
  73         maintenance_command -- access the maintenance subcommands
  74
  75 SYNOPSIS
  76
  77         void maintenance_command (char *args, int from_tty)
  78
  79 DESCRIPTION
  80
  81 */
  82
  83 static void
  84 maintenance_command (args, from_tty)
  85      char *args;
  86      int from_tty;
  87 {
  88   printf_unfiltered ("\"maintenance\" must be followed by the name of a maintenance command.\n");
  89   help_list (maintenancelist, "maintenance ", -1, gdb_stdout);
  90 }
  91
  92 #ifndef _WIN32
  93 /* ARGSUSED */
  94 static void
  95 maintenance_dump_me (args, from_tty)
  96      char *args;
  97      int from_tty;
  98 {
  99   if (query ("Should GDB dump core? "))
 100     {
 101       signal (SIGQUIT, SIG_DFL);
 102       kill (getpid (), SIGQUIT);
 103     }
 104 }
 105 #endif
 106
 107 /*  Someday we should allow demangling for things other than just
 108     explicit strings.  For example, we might want to be able to
 109     specify the address of a string in either GDB's process space
 110     or the debuggee's process space, and have gdb fetch and demangle
 111     that string.  If we have a char* pointer "ptr" that points to
 112     a string, we might want to be able to given just the name and
 113     have GDB demangle and print what it points to, etc.  (FIXME) */
 114
 115 static void
 116 maintenance_demangle (args, from_tty)
 117      char *args;
 118      int from_tty;
 119 {
 120   char *demangled;
 121
 122   if (args == NULL || *args == '\0')
 123     {
 124       printf_unfiltered ("\"maintenance demangle\" takes an argument to demangle.\n");
 125     }
 126   else
 127     {
 128       demangled = cplus_demangle (args, DMGL_ANSI | DMGL_PARAMS);
 129       if (demangled != NULL)
 130         {
 131           printf_unfiltered ("%s\n", demangled);
 132           free (demangled);
 133         }
 134       else
 135         {
 136           printf_unfiltered ("Can't demangle \"%s\"\n", args);
 137         }
 138     }
 139 }
 140
 141 static void
 142 maintenance_time_display (args, from_tty)
 143      char *args;
 144      int from_tty;
 145 {
 146   extern int display_time;
 147
 148   if (args == NULL || *args == '\0')
 149     printf_unfiltered ("\"maintenance time\" takes a numeric argument.\n");
 150   else
 151     display_time = strtol (args, NULL, 10);
 152 }
 153
 154 static void
 155 maintenance_space_display (args, from_tty)
 156      char *args;
 157      int from_tty;
 158 {
 159   extern int display_space;
 160
 161   if (args == NULL || *args == '\0')
 162     printf_unfiltered ("\"maintenance space\" takes a numeric argument.\n");
 163   else
 164     display_space = strtol (args, NULL, 10);
 165 }
 166
 167 /* The "maintenance info" command is defined as a prefix, with allow_unknown 0.
 168    Therefore, its own definition is called only for "maintenance info" with
 169    no args.  */
 170
 171 /* ARGSUSED */
 172 static void
 173 maintenance_info_command (arg, from_tty)
 174      char *arg;
 175      int from_tty;
 176 {
 177   printf_unfiltered ("\"maintenance info\" must be followed by the name of an info command.\n");
 178   help_list (maintenanceinfolist, "maintenance info ", -1, gdb_stdout);
 179 }
 180
 181 static void
 182 print_section_table (abfd, asect, ignore)
 183      bfd *abfd;
 184      asection *asect;
 185      PTR ignore;
 186 {
 187   flagword flags;
 188
 189   flags = bfd_get_section_flags (abfd, asect);
 190
 191   /* FIXME-32x64: Need print_address_numeric with field width.  */
 192   printf_filtered ("    %s",
 193                    local_hex_string_custom
 194                      ((unsigned long) bfd_section_vma (abfd, asect), "08l"));
 195   printf_filtered ("->%s",
 196                    local_hex_string_custom
 197                      ((unsigned long) (bfd_section_vma (abfd, asect)
 198                                        + bfd_section_size (abfd, asect)),
 199                       "08l"));
 200   printf_filtered (" at %s",
 201                    local_hex_string_custom
 202                      ((unsigned long) asect->filepos, "08l"));
 203   printf_filtered (": %s", bfd_section_name (abfd, asect));
 204
 205   if (flags & SEC_ALLOC)
 206     printf_filtered (" ALLOC");
 207   if (flags & SEC_LOAD)
 208     printf_filtered (" LOAD");
 209   if (flags & SEC_RELOC)
 210     printf_filtered (" RELOC");
 211   if (flags & SEC_READONLY)
 212     printf_filtered (" READONLY");
 213   if (flags & SEC_CODE)
 214     printf_filtered (" CODE");
 215   if (flags & SEC_DATA)
 216     printf_filtered (" DATA");
 217   if (flags & SEC_ROM)
 218     printf_filtered (" ROM");
 219   if (flags & SEC_CONSTRUCTOR)
 220     printf_filtered (" CONSTRUCTOR");
 221   if (flags & SEC_HAS_CONTENTS)
 222     printf_filtered (" HAS_CONTENTS");
 223   if (flags & SEC_NEVER_LOAD)
 224     printf_filtered (" NEVER_LOAD");
 225   if (flags & SEC_COFF_SHARED_LIBRARY)
 226     printf_filtered (" COFF_SHARED_LIBRARY");
 227   if (flags & SEC_IS_COMMON)
 228     printf_filtered (" IS_COMMON");
 229
 230   printf_filtered ("\n");
 231 }
 232
 233 /* ARGSUSED */
 234 static void
 235 maintenance_info_sections (arg, from_tty)
 236      char *arg;
 237      int from_tty;
 238 {
 239   if (exec_bfd)
 240     {
 241       printf_filtered ("Exec file:\n");
 242       printf_filtered ("    `%s', ", bfd_get_filename(exec_bfd));
 243       wrap_here ("        ");
 244       printf_filtered ("file type %s.\n", bfd_get_target(exec_bfd));
 245       bfd_map_over_sections(exec_bfd, print_section_table, 0);
 246     }
 247
 248   if (core_bfd)
 249     {
 250       printf_filtered ("Core file:\n");
 251       printf_filtered ("    `%s', ", bfd_get_filename(core_bfd));
 252       wrap_here ("        ");
 253       printf_filtered ("file type %s.\n", bfd_get_target(core_bfd));
 254       bfd_map_over_sections(core_bfd, print_section_table, 0);
 255     }
 256 }
 257
 258 /* ARGSUSED */
 259 void
 260 maintenance_print_statistics (args, from_tty)
 261      char *args;
 262      int from_tty;
 263 {
 264   print_objfile_statistics ();
 265   print_symbol_bcache_statistics ();
 266 }
 267
 268 /* The "maintenance print" command is defined as a prefix, with allow_unknown
 269    0.  Therefore, its own definition is called only for "maintenance print"
 270    with no args.  */
 271
 272 /* ARGSUSED */
 273 static void
 274 maintenance_print_command (arg, from_tty)
 275      char *arg;
 276      int from_tty;
 277 {
 278   printf_unfiltered ("\"maintenance print\" must be followed by the name of a print command.\n");
 279   help_list (maintenanceprintlist, "maintenance print ", -1, gdb_stdout);
 280 }
 281
 282 /* The "maintenance translate-address" command converts a section and address
 283    to a symbol.  This can be called in two ways:
 284                 maintenance translate-address <secname> <addr>
 285         or      maintenance translate-address <addr>
 286 */
 287
 288 static void
 289 maintenance_translate_address (arg, from_tty)
 290      char *arg;
 291      int from_tty;
 292 {
 293   CORE_ADDR address;
 294   asection *sect;
 295   char *p;
 296   struct minimal_symbol *sym;
 297   struct objfile *objfile;
 298
 299   if (arg == NULL || *arg == 0)
 300     error ("requires argument (address or section + address)");
 301
 302   sect = NULL;
 303   p = arg;
 304
 305   if (!isdigit (*p))
 306     {                           /* See if we have a valid section name */
 307       while (*p && !isspace (*p)) /* Find end of section name */
 308         p++;
 309       if (*p == '\000')         /* End of command? */
 310         error ("Need to specify <section-name> and <address>");
 311       *p++ = '\000';
 312       while (isspace (*p)) p++; /* Skip whitespace */
 313
 314       ALL_OBJFILES (objfile)
 315         {
 316           sect = bfd_get_section_by_name (objfile->obfd, arg);
 317           if (sect != NULL)
 318             break;
 319         }
 320
 321       if (!sect)
 322         error ("Unknown section %s.", arg);
 323     }
 324
 325   address = parse_and_eval_address (p);
 326
 327   if (sect)
 328     sym = lookup_minimal_symbol_by_pc_section (address, sect);
 329   else
 330     sym = lookup_minimal_symbol_by_pc (address);
 331
 332   if (sym)
 333     printf_filtered ("%s+%u\n",
 334                      SYMBOL_SOURCE_NAME (sym),
 335                      address - SYMBOL_VALUE_ADDRESS (sym));
 336   else if (sect)
 337     printf_filtered ("no symbol at %s:0x%08x\n", sect->name, address);
 338   else
 339     printf_filtered ("no symbol at 0x%08x\n", address);
 340
 341   return;
 342 }
 343
 344 void
 345 _initialize_maint_cmds ()
 346 {
 347   add_prefix_cmd ("maintenance", class_maintenance, maintenance_command,
 348                   "Commands for use by GDB maintainers.\n\
 349 Includes commands to dump specific internal GDB structures in\n\
 350 a human readable form, to cause GDB to deliberately dump core,\n\
 351 to test internal functions such as the C++ demangler, etc.",
 352                   &maintenancelist, "maintenance ", 0,
 353                   &cmdlist);
 354
 355   add_com_alias ("mt", "maintenance", class_maintenance, 1);
 356
 357   add_prefix_cmd ("info", class_maintenance, maintenance_info_command,
 358                   "Commands for showing internal info about the program being debugged.",
 359                   &maintenanceinfolist, "maintenance info ", 0,
 360                   &maintenancelist);
 361
 362   add_cmd ("sections", class_maintenance, maintenance_info_sections,
 363            "List the BFD sections of the exec and core files.",
 364            &maintenanceinfolist);
 365
 366   add_prefix_cmd ("print", class_maintenance, maintenance_print_command,
 367                   "Maintenance command for printing GDB internal state.",
 368                   &maintenanceprintlist, "maintenance print ", 0,
 369                   &maintenancelist);
 370
 371 #ifndef _WIN32
 372   add_cmd ("dump-me", class_maintenance, maintenance_dump_me,
 373            "Get fatal error; make debugger dump its core.\n\
 374 GDB sets it's handling of SIGQUIT back to SIG_DFL and then sends\n\
 375 itself a SIGQUIT signal.",
 376            &maintenancelist);
 377 #endif
 378
 379   add_cmd ("demangle", class_maintenance, maintenance_demangle,
 380            "Demangle a C++ mangled name.\n\
 381 Call internal GDB demangler routine to demangle a C++ link name\n\
 382 and prints the result.",
 383            &maintenancelist);
 384
 385   add_cmd ("time", class_maintenance, maintenance_time_display,
 386            "Set the display of time usage.\n\
 387 If nonzero, will cause the execution time for each command to be\n\
 388 displayed, following the command's output.",
 389            &maintenancelist);
 390
 391   add_cmd ("space", class_maintenance, maintenance_space_display,
 392            "Set the display of space usage.\n\
 393 If nonzero, will cause the execution space for each command to be\n\
 394 displayed, following the command's output.",
 395            &maintenancelist);
 396
 397   add_cmd ("type", class_maintenance, maintenance_print_type,
 398            "Print a type chain for a given symbol.\n\
 399 For each node in a type chain, print the raw data for each member of\n\
 400 the type structure, and the interpretation of the data.",
 401            &maintenanceprintlist);
 402
 403   add_cmd ("symbols", class_maintenance, maintenance_print_symbols,
 404            "Print dump of current symbol definitions.\n\
 405 Entries in the full symbol table are dumped to file OUTFILE.\n\
 406 If a SOURCE file is specified, dump only that file's symbols.",
 407            &maintenanceprintlist);
 408
 409   add_cmd ("msymbols", class_maintenance, maintenance_print_msymbols,
 410            "Print dump of current minimal symbol definitions.\n\
 411 Entries in the minimal symbol table are dumped to file OUTFILE.\n\
 412 If a SOURCE file is specified, dump only that file's minimal symbols.",
 413            &maintenanceprintlist);
 414
 415   add_cmd ("psymbols", class_maintenance, maintenance_print_psymbols,
 416            "Print dump of current partial symbol definitions.\n\
 417 Entries in the partial symbol table are dumped to file OUTFILE.\n\
 418 If a SOURCE file is specified, dump only that file's partial symbols.",
 419            &maintenanceprintlist);
 420
 421   add_cmd ("objfiles", class_maintenance, maintenance_print_objfiles,
 422            "Print dump of current object file definitions.",
 423            &maintenanceprintlist);
 424
 425   add_cmd ("statistics", class_maintenance, maintenance_print_statistics,
 426            "Print statistics about internal gdb state.",
 427            &maintenanceprintlist);
 428
 429   add_cmd ("check-symtabs", class_maintenance, maintenance_check_symtabs,
 430            "Check consistency of psymtabs and symtabs.",
 431            &maintenancelist);
 432
 433   add_cmd ("translate-address", class_maintenance, maintenance_translate_address,
 434            "Translate a section name and address to a symbol.",
 435            &maintenancelist);
 436
 437   add_show_from_set (
 438     add_set_cmd ("watchdog", class_maintenance, var_zinteger, (char *)&watchdog,
 439                  "Set watchdog timer.\n\
 440 When non-zero, this timeout is used instead of waiting forever for a target to\n\
 441 finish a low-level step or continue operation.  If the specified amount of time\n\
 442 passes without a response from the target, an error occurs.", &setlist),
 443                      &showlist);
 444 }