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/* Support for GDB maintenance commands.

   Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1999, 2000, 2001, 2002,

   2003, 2004, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.

   Written by Fred Fish at Cygnus Support.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "defs.h"

#include "arch-utils.h"

#include <ctype.h>

#include <signal.h>

#include "command.h"

#include "gdbcmd.h"

#include "symtab.h"

#include "gdbtypes.h"

#include "demangle.h"

#include "gdbcore.h"

#include "expression.h"         /* For language.h */

#include "language.h"

#include "symfile.h"

#include "objfiles.h"

#include "value.h"

#include "gdb_assert.h"

#include "cli/cli-decode.h"

extern void _initialize_maint_cmds (void);

static void maintenance_command (char *, int);

static void maintenance_internal_error (char *args, int from_tty);

static void maintenance_demangle (char *, int);

static void maintenance_time_display (char *, int);

static void maintenance_space_display (char *, int);

static void maintenance_info_command (char *, int);

static void maintenance_info_sections (char *, int);

static void maintenance_print_command (char *, int);

static void maintenance_do_deprecate (char *, int);

/* Set this to the maximum number of seconds to wait instead of waiting forever

   in target_wait().  If this timer times out, then it generates an error and

   the command is aborted.  This replaces most of the need for timeouts in the

   GDB test suite, and makes it possible to distinguish between a hung target

   and one with slow communications.  */

int watchdog = 0;

static void

show_watchdog (struct ui_file *file, int from_tty,

               struct cmd_list_element *c, const char *value)

{

  fprintf_filtered (file, _("Watchdog timer is %s.\n"), value);

}

/*

   LOCAL FUNCTION

   maintenance_command -- access the maintenance subcommands

   SYNOPSIS

   void maintenance_command (char *args, int from_tty)

   DESCRIPTION

 */

static void

maintenance_command (char *args, int from_tty)

{

  printf_unfiltered (_("\"maintenance\" must be followed by the name of a maintenance command.\n"));

  help_list (maintenancelist, "maintenance ", -1, gdb_stdout);

}

#ifndef _WIN32

static void

maintenance_dump_me (char *args, int from_tty)

{

  if (query (_("Should GDB dump core? ")))

    {

#ifdef __DJGPP__

      /* SIGQUIT by default is ignored, so use SIGABRT instead.  */

      signal (SIGABRT, SIG_DFL);

      kill (getpid (), SIGABRT);

#else

      signal (SIGQUIT, SIG_DFL);

      kill (getpid (), SIGQUIT);

#endif

    }

}

#endif

/* Stimulate the internal error mechanism that GDB uses when an

   internal problem is detected.  Allows testing of the mechanism.

   Also useful when the user wants to drop a core file but not exit

   GDB. */

static void

maintenance_internal_error (char *args, int from_tty)

{

  internal_error (__FILE__, __LINE__, "%s", (args == NULL ? "" : args));

}

/* Stimulate the internal error mechanism that GDB uses when an

   internal problem is detected.  Allows testing of the mechanism.

   Also useful when the user wants to drop a core file but not exit

   GDB. */

static void

maintenance_internal_warning (char *args, int from_tty)

{

  internal_warning (__FILE__, __LINE__, "%s", (args == NULL ? "" : args));

}

/* Someday we should allow demangling for things other than just

   explicit strings.  For example, we might want to be able to specify

   the address of a string in either GDB's process space or the

   debuggee's process space, and have gdb fetch and demangle that

   string.  If we have a char* pointer "ptr" that points to a string,

   we might want to be able to given just the name and have GDB

   demangle and print what it points to, etc.  (FIXME) */

static void

maintenance_demangle (char *args, int from_tty)

{

  char *demangled;

  if (args == NULL || *args == '\0')

    {

      printf_unfiltered (_("\"maintenance demangle\" takes an argument to demangle.\n"));

    }

  else

    {

      demangled = language_demangle (current_language, args,

                                     DMGL_ANSI | DMGL_PARAMS);

      if (demangled != NULL)

        {

          printf_unfiltered ("%s\n", demangled);

          xfree (demangled);

        }

      else

        {

          printf_unfiltered (_("Can't demangle \"%s\"\n"), args);

        }

    }

}

static void

maintenance_time_display (char *args, int from_tty)

{

  extern int display_time;

  if (args == NULL || *args == '\0')

    printf_unfiltered (_("\"maintenance time\" takes a numeric argument.\n"));

  else

    display_time = strtol (args, NULL, 10);

}

static void

maintenance_space_display (char *args, int from_tty)

{

  extern int display_space;

  if (args == NULL || *args == '\0')

    printf_unfiltered ("\"maintenance space\" takes a numeric argument.\n");

  else

    display_space = strtol (args, NULL, 10);

}

/* The "maintenance info" command is defined as a prefix, with

   allow_unknown 0.  Therefore, its own definition is called only for

   "maintenance info" with no args.  */

static void

maintenance_info_command (char *arg, int from_tty)

{

  printf_unfiltered (_("\"maintenance info\" must be followed by the name of an info command.\n"));

  help_list (maintenanceinfolist, "maintenance info ", -1, gdb_stdout);

}

/* Mini tokenizing lexer for 'maint info sections' command.  */

static int

match_substring (const char *string, const char *substr)

{

  int substr_len = strlen(substr);

  const char *tok;

  while ((tok = strstr (string, substr)) != NULL)

    {

      /* Got a partial match.  Is it a whole word? */

      if (tok == string

          || tok[-1] == ' '

          || tok[-1] == '\t')

      {

        /* Token is delimited at the front... */

        if (tok[substr_len] == ' '

            || tok[substr_len] == '\t'

            || tok[substr_len] == '\0')

        {

          /* Token is delimited at the rear.  Got a whole-word match.  */

          return 1;

        }

      }

      /* Token didn't match as a whole word.  Advance and try again.  */

      string = tok + 1;

    }

  return 0;

}

static int

match_bfd_flags (char *string, flagword flags)

{

  if (flags & SEC_ALLOC)

    if (match_substring (string, "ALLOC"))

      return 1;

  if (flags & SEC_LOAD)

    if (match_substring (string, "LOAD"))

      return 1;

  if (flags & SEC_RELOC)

    if (match_substring (string, "RELOC"))

      return 1;

  if (flags & SEC_READONLY)

    if (match_substring (string, "READONLY"))

      return 1;

  if (flags & SEC_CODE)

    if (match_substring (string, "CODE"))

      return 1;

  if (flags & SEC_DATA)

    if (match_substring (string, "DATA"))

      return 1;

  if (flags & SEC_ROM)

    if (match_substring (string, "ROM"))

      return 1;

  if (flags & SEC_CONSTRUCTOR)

    if (match_substring (string, "CONSTRUCTOR"))

      return 1;

  if (flags & SEC_HAS_CONTENTS)

    if (match_substring (string, "HAS_CONTENTS"))

      return 1;

  if (flags & SEC_NEVER_LOAD)

    if (match_substring (string, "NEVER_LOAD"))

      return 1;

  if (flags & SEC_COFF_SHARED_LIBRARY)

    if (match_substring (string, "COFF_SHARED_LIBRARY"))

      return 1;

  if (flags & SEC_IS_COMMON)

    if (match_substring (string, "IS_COMMON"))

      return 1;

  return 0;

}

static void

print_bfd_flags (flagword flags)

{

  if (flags & SEC_ALLOC)

    printf_filtered (" ALLOC");

  if (flags & SEC_LOAD)

    printf_filtered (" LOAD");

  if (flags & SEC_RELOC)

    printf_filtered (" RELOC");

  if (flags & SEC_READONLY)

    printf_filtered (" READONLY");

  if (flags & SEC_CODE)

    printf_filtered (" CODE");

  if (flags & SEC_DATA)

    printf_filtered (" DATA");

  if (flags & SEC_ROM)

    printf_filtered (" ROM");

  if (flags & SEC_CONSTRUCTOR)

    printf_filtered (" CONSTRUCTOR");

  if (flags & SEC_HAS_CONTENTS)

    printf_filtered (" HAS_CONTENTS");

  if (flags & SEC_NEVER_LOAD)

    printf_filtered (" NEVER_LOAD");

  if (flags & SEC_COFF_SHARED_LIBRARY)

    printf_filtered (" COFF_SHARED_LIBRARY");

  if (flags & SEC_IS_COMMON)

    printf_filtered (" IS_COMMON");

}

static void

maint_print_section_info (const char *name, flagword flags,

                          CORE_ADDR addr, CORE_ADDR endaddr,

                          unsigned long filepos, int addr_size)

{

  printf_filtered ("    %s", hex_string_custom (addr, addr_size));

  printf_filtered ("->%s", hex_string_custom (endaddr, addr_size));

  printf_filtered (" at %s",

                   hex_string_custom ((unsigned long) filepos, 8));

  printf_filtered (": %s", name);

  print_bfd_flags (flags);

  printf_filtered ("\n");

}

static void

print_bfd_section_info (bfd *abfd,

                        asection *asect,

                        void *arg)

{

  flagword flags = bfd_get_section_flags (abfd, asect);

  const char *name = bfd_section_name (abfd, asect);

  if (arg == NULL || *((char *) arg) == '\0'

      || match_substring ((char *) arg, name)

      || match_bfd_flags ((char *) arg, flags))

    {

      struct gdbarch *gdbarch = gdbarch_from_bfd (abfd);

      int addr_size = gdbarch_addr_bit (gdbarch) / 8;

      CORE_ADDR addr, endaddr;

      addr = bfd_section_vma (abfd, asect);

      endaddr = addr + bfd_section_size (abfd, asect);

      maint_print_section_info (name, flags, addr, endaddr,

                                asect->filepos, addr_size);

    }

}

static void

print_objfile_section_info (bfd *abfd,

                            struct obj_section *asect,

                            char *string)

{

  flagword flags = bfd_get_section_flags (abfd, asect->the_bfd_section);

  const char *name = bfd_section_name (abfd, asect->the_bfd_section);

  if (string == NULL || *string == '\0'

      || match_substring (string, name)

      || match_bfd_flags (string, flags))

    {

      struct gdbarch *gdbarch = gdbarch_from_bfd (abfd);

      int addr_size = gdbarch_addr_bit (gdbarch) / 8;

      maint_print_section_info (name, flags,

                                obj_section_addr (asect),

                                obj_section_endaddr (asect),

                                asect->the_bfd_section->filepos,

                                addr_size);

    }

}

static void

maintenance_info_sections (char *arg, int from_tty)

{

  if (exec_bfd)

    {

      printf_filtered (_("Exec file:\n"));

      printf_filtered ("    `%s', ", bfd_get_filename (exec_bfd));

      wrap_here ("        ");

      printf_filtered (_("file type %s.\n"), bfd_get_target (exec_bfd));

      if (arg && *arg && match_substring (arg, "ALLOBJ"))

        {

          struct objfile *ofile;

          struct obj_section *osect;

          /* Only this function cares about the 'ALLOBJ' argument;

             if 'ALLOBJ' is the only argument, discard it rather than

             passing it down to print_objfile_section_info (which

             wouldn't know how to handle it).  */

          if (strcmp (arg, "ALLOBJ") == 0)

            arg = NULL;

          ALL_OBJFILES (ofile)

            {

              printf_filtered (_("  Object file: %s\n"),

                               bfd_get_filename (ofile->obfd));

              ALL_OBJFILE_OSECTIONS (ofile, osect)

                {

                  print_objfile_section_info (ofile->obfd, osect, arg);

                }

            }

        }

      else

        bfd_map_over_sections (exec_bfd, print_bfd_section_info, arg);

    }

  if (core_bfd)

    {

      printf_filtered (_("Core file:\n"));

      printf_filtered ("    `%s', ", bfd_get_filename (core_bfd));

      wrap_here ("        ");

      printf_filtered (_("file type %s.\n"), bfd_get_target (core_bfd));

      bfd_map_over_sections (core_bfd, print_bfd_section_info, arg);

    }

}

void

maintenance_print_statistics (char *args, int from_tty)

{

  print_objfile_statistics ();

  print_symbol_bcache_statistics ();

}

static void

maintenance_print_architecture (char *args, int from_tty)

{

  struct gdbarch *gdbarch = get_current_arch ();

  if (args == NULL)

    gdbarch_dump (gdbarch, gdb_stdout);

  else

    {

      struct cleanup *cleanups;

      struct ui_file *file = gdb_fopen (args, "w");

      if (file == NULL)

        perror_with_name (_("maintenance print architecture"));

      cleanups = make_cleanup_ui_file_delete (file);

      gdbarch_dump (gdbarch, file);

      do_cleanups (cleanups);

    }

}

/* The "maintenance print" command is defined as a prefix, with

   allow_unknown 0.  Therefore, its own definition is called only for

   "maintenance print" with no args.  */

static void

maintenance_print_command (char *arg, int from_tty)

{

  printf_unfiltered (_("\"maintenance print\" must be followed by the name of a print command.\n"));

  help_list (maintenanceprintlist, "maintenance print ", -1, gdb_stdout);

}

/* The "maintenance translate-address" command converts a section and address

   to a symbol.  This can be called in two ways:

   maintenance translate-address <secname> <addr>

   or   maintenance translate-address <addr>

 */

static void

maintenance_translate_address (char *arg, int from_tty)

{

  CORE_ADDR address;

  struct obj_section *sect;

  char *p;

  struct minimal_symbol *sym;

  struct objfile *objfile;

  if (arg == NULL || *arg == 0)

    error (_("requires argument (address or section + address)"));

  sect = NULL;

  p = arg;

  if (!isdigit (*p))

    {                           /* See if we have a valid section name */

      while (*p && !isspace (*p))       /* Find end of section name */

        p++;

      if (*p == '\000')         /* End of command? */

        error (_("Need to specify <section-name> and <address>"));

      *p++ = '\000';

      while (isspace (*p))

        p++;                    /* Skip whitespace */

      ALL_OBJSECTIONS (objfile, sect)

      {

        if (strcmp (sect->the_bfd_section->name, arg) == 0)

          break;

      }

      if (!objfile)

        error (_("Unknown section %s."), arg);

    }

  address = parse_and_eval_address (p);

  if (sect)

    sym = lookup_minimal_symbol_by_pc_section (address, sect);

  else

    sym = lookup_minimal_symbol_by_pc (address);

  if (sym)

    {

      const char *symbol_name = SYMBOL_PRINT_NAME (sym);

      const char *symbol_offset = pulongest (address - SYMBOL_VALUE_ADDRESS (sym));

      sect = SYMBOL_OBJ_SECTION(sym);

      if (sect != NULL)

        {

          const char *section_name;

          const char *obj_name;

          gdb_assert (sect->the_bfd_section && sect->the_bfd_section->name);

          section_name = sect->the_bfd_section->name;

          gdb_assert (sect->objfile && sect->objfile->name);

          obj_name = sect->objfile->name;

          if (MULTI_OBJFILE_P ())

            printf_filtered (_("%s + %s in section %s of %s\n"),

                             symbol_name, symbol_offset, section_name, obj_name);

          else

            printf_filtered (_("%s + %s in section %s\n"),

                             symbol_name, symbol_offset, section_name);

        }

      else

        printf_filtered (_("%s + %s\n"), symbol_name, symbol_offset);

    }

  else if (sect)

    printf_filtered (_("no symbol at %s:%s\n"),

                     sect->the_bfd_section->name, hex_string (address));

  else

    printf_filtered (_("no symbol at %s\n"), hex_string (address));

  return;

}

/* When a command is deprecated the user will be warned the first time

   the command is used.  If possible, a replacement will be

   offered. */

static void

maintenance_deprecate (char *args, int from_tty)

{

  if (args == NULL || *args == '\0')

    {

      printf_unfiltered (_("\"maintenance deprecate\" takes an argument, \n\

the command you want to deprecate, and optionally the replacement command \n\

enclosed in quotes.\n"));

    }

  maintenance_do_deprecate (args, 1);

}

static void

maintenance_undeprecate (char *args, int from_tty)

{

  if (args == NULL || *args == '\0')

    {

      printf_unfiltered (_("\"maintenance undeprecate\" takes an argument, \n\

the command you want to undeprecate.\n"));

    }

  maintenance_do_deprecate (args, 0);

}

/* You really shouldn't be using this. It is just for the testsuite.

   Rather, you should use deprecate_cmd() when the command is created

   in _initialize_blah().

   This function deprecates a command and optionally assigns it a

   replacement.  */

static void

maintenance_do_deprecate (char *text, int deprecate)

{

  struct cmd_list_element *alias = NULL;

  struct cmd_list_element *prefix_cmd = NULL;

  struct cmd_list_element *cmd = NULL;

  char *start_ptr = NULL;

  char *end_ptr = NULL;

  int len;

  char *replacement = NULL;

  if (text == NULL)

    return;

  if (!lookup_cmd_composition (text, &alias, &prefix_cmd, &cmd))

    {

      printf_filtered (_("Can't find command '%s' to deprecate.\n"), text);

      return;

    }

  if (deprecate)

    {

      /* look for a replacement command */

      start_ptr = strchr (text, '\"');

      if (start_ptr != NULL)

        {

          start_ptr++;

          end_ptr = strrchr (start_ptr, '\"');

          if (end_ptr != NULL)

            {

              len = end_ptr - start_ptr;

              start_ptr[len] = '\0';

              replacement = xstrdup (start_ptr);

            }

        }

    }

  if (!start_ptr || !end_ptr)

    replacement = NULL;

  /* If they used an alias, we only want to deprecate the alias.

     Note the MALLOCED_REPLACEMENT test.  If the command's replacement

     string was allocated at compile time we don't want to free the

     memory. */

  if (alias)

    {

      if (alias->flags & MALLOCED_REPLACEMENT)

        xfree (alias->replacement);

      if (deprecate)

        alias->flags |= (DEPRECATED_WARN_USER | CMD_DEPRECATED);

      else

        alias->flags &= ~(DEPRECATED_WARN_USER | CMD_DEPRECATED);

      alias->replacement = replacement;

      alias->flags |= MALLOCED_REPLACEMENT;

      return;

    }

  else if (cmd)

    {

      if (cmd->flags & MALLOCED_REPLACEMENT)

        xfree (cmd->replacement);

      if (deprecate)

        cmd->flags |= (DEPRECATED_WARN_USER | CMD_DEPRECATED);

      else

        cmd->flags &= ~(DEPRECATED_WARN_USER | CMD_DEPRECATED);

      cmd->replacement = replacement;

      cmd->flags |= MALLOCED_REPLACEMENT;

      return;

    }

}

/* Maintenance set/show framework.  */

struct cmd_list_element *maintenance_set_cmdlist;

struct cmd_list_element *maintenance_show_cmdlist;

static void

maintenance_set_cmd (char *args, int from_tty)

{

  printf_unfiltered (_("\"maintenance set\" must be followed by the name of a set command.\n"));

  help_list (maintenance_set_cmdlist, "maintenance set ", -1, gdb_stdout);

}

static void

maintenance_show_cmd (char *args, int from_tty)

{

  cmd_show_list (maintenance_show_cmdlist, from_tty, "");

}