Subversion Repositories openrisc_2011-10-31

/* Do various things to symbol tables (other than lookup), for GDB.

   Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,

   1996, 1997, 1998, 1999, 2000, 2002, 2003, 2004, 2007, 2008, 2009, 2010

   Free Software Foundation, Inc.

   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 "symtab.h"

#include "gdbtypes.h"

#include "bfd.h"

#include "symfile.h"

#include "objfiles.h"

#include "breakpoint.h"

#include "command.h"

#include "gdb_obstack.h"

#include "exceptions.h"

#include "language.h"

#include "bcache.h"

#include "block.h"

#include "gdb_regex.h"

#include "gdb_stat.h"

#include "dictionary.h"

#include "gdb_string.h"

#include "readline/readline.h"

#include "psymtab.h"

#ifndef DEV_TTY

#define DEV_TTY "/dev/tty"

#endif

/* Unfortunately for debugging, stderr is usually a macro.  This is painful

   when calling functions that take FILE *'s from the debugger.

   So we make a variable which has the same value and which is accessible when

   debugging GDB with itself.  Because stdin et al need not be constants,

   we initialize them in the _initialize_symmisc function at the bottom

   of the file.  */

FILE *std_in;

FILE *std_out;

FILE *std_err;

/* Prototypes for local functions */

static void dump_symtab (struct objfile *, struct symtab *,

                         struct ui_file *);

static void dump_msymbols (struct objfile *, struct ui_file *);

static void dump_objfile (struct objfile *);

static int block_depth (struct block *);

void _initialize_symmisc (void);

struct print_symbol_args

  {

    struct gdbarch *gdbarch;

    struct symbol *symbol;

    int depth;

    struct ui_file *outfile;

  };

static int print_symbol (void *);

/* Free all the storage associated with the struct symtab <- S.

   Note that some symtabs have contents that all live inside one big block of

   memory, and some share the contents of another symbol table and so you

   should not free the contents on their behalf (except sometimes the

   linetable, which maybe per symtab even when the rest is not).

   It is s->free_code that says which alternative to use.  */

void

free_symtab (struct symtab *s)

{

  switch (s->free_code)

    {

    case free_nothing:

      /* All the contents are part of a big block of memory (an obstack),

         and some other symtab is in charge of freeing that block.

         Therefore, do nothing.  */

      break;

    case free_linetable:

      /* Everything will be freed either by our `free_func'

         or by some other symtab, except for our linetable.

         Free that now.  */

      if (LINETABLE (s))

        xfree (LINETABLE (s));

      break;

    }

  /* If there is a single block of memory to free, free it.  */

  if (s->free_func != NULL)

    s->free_func (s);

  /* Free source-related stuff */

  if (s->line_charpos != NULL)

    xfree (s->line_charpos);

  if (s->fullname != NULL)

    xfree (s->fullname);

  if (s->debugformat != NULL)

    xfree (s->debugformat);

  xfree (s);

}

void

print_symbol_bcache_statistics (void)

{

  struct program_space *pspace;

  struct objfile *objfile;

  immediate_quit++;

  ALL_PSPACES (pspace)

    ALL_PSPACE_OBJFILES (pspace, objfile)

  {

    printf_filtered (_("Byte cache statistics for '%s':\n"), objfile->name);

    print_bcache_statistics (objfile->psymbol_cache, "partial symbol cache");

    print_bcache_statistics (objfile->macro_cache, "preprocessor macro cache");

    print_bcache_statistics (objfile->filename_cache, "file name cache");

  }

  immediate_quit--;

}

void

print_objfile_statistics (void)

{

  struct program_space *pspace;

  struct objfile *objfile;

  struct symtab *s;

  int i, linetables, blockvectors;

  immediate_quit++;

  ALL_PSPACES (pspace)

    ALL_PSPACE_OBJFILES (pspace, objfile)

  {

    printf_filtered (_("Statistics for '%s':\n"), objfile->name);

    if (OBJSTAT (objfile, n_stabs) > 0)

      printf_filtered (_("  Number of \"stab\" symbols read: %d\n"),

                       OBJSTAT (objfile, n_stabs));

    if (OBJSTAT (objfile, n_minsyms) > 0)

      printf_filtered (_("  Number of \"minimal\" symbols read: %d\n"),

                       OBJSTAT (objfile, n_minsyms));

    if (OBJSTAT (objfile, n_psyms) > 0)

      printf_filtered (_("  Number of \"partial\" symbols read: %d\n"),

                       OBJSTAT (objfile, n_psyms));

    if (OBJSTAT (objfile, n_syms) > 0)

      printf_filtered (_("  Number of \"full\" symbols read: %d\n"),

                       OBJSTAT (objfile, n_syms));

    if (OBJSTAT (objfile, n_types) > 0)

      printf_filtered (_("  Number of \"types\" defined: %d\n"),

                       OBJSTAT (objfile, n_types));

    if (objfile->sf)

      objfile->sf->qf->print_stats (objfile);

    i = linetables = blockvectors = 0;

    ALL_OBJFILE_SYMTABS (objfile, s)

      {

        i++;

        if (s->linetable != NULL)

          linetables++;

        if (s->primary == 1)

          blockvectors++;

      }

    printf_filtered (_("  Number of symbol tables: %d\n"), i);

    printf_filtered (_("  Number of symbol tables with line tables: %d\n"),

                     linetables);

    printf_filtered (_("  Number of symbol tables with blockvectors: %d\n"),

                     blockvectors);

    if (OBJSTAT (objfile, sz_strtab) > 0)

      printf_filtered (_("  Space used by a.out string tables: %d\n"),

                       OBJSTAT (objfile, sz_strtab));

    printf_filtered (_("  Total memory used for objfile obstack: %d\n"),

                     obstack_memory_used (&objfile->objfile_obstack));

    printf_filtered (_("  Total memory used for psymbol cache: %d\n"),

                     bcache_memory_used (objfile->psymbol_cache));

    printf_filtered (_("  Total memory used for macro cache: %d\n"),

                     bcache_memory_used (objfile->macro_cache));

    printf_filtered (_("  Total memory used for file name cache: %d\n"),

                     bcache_memory_used (objfile->filename_cache));

  }

  immediate_quit--;

}

static void

dump_objfile (struct objfile *objfile)

{

  struct symtab *symtab;

  printf_filtered ("\nObject file %s:  ", objfile->name);

  printf_filtered ("Objfile at ");

  gdb_print_host_address (objfile, gdb_stdout);

  printf_filtered (", bfd at ");

  gdb_print_host_address (objfile->obfd, gdb_stdout);

  printf_filtered (", %d minsyms\n\n",

                   objfile->minimal_symbol_count);

  if (objfile->sf)

    objfile->sf->qf->dump (objfile);

  if (objfile->symtabs)

    {

      printf_filtered ("Symtabs:\n");

      for (symtab = objfile->symtabs;

           symtab != NULL;

           symtab = symtab->next)

        {

          printf_filtered ("%s at ", symtab->filename);

          gdb_print_host_address (symtab, gdb_stdout);

          printf_filtered (", ");

          if (symtab->objfile != objfile)

            {

              printf_filtered ("NOT ON CHAIN!  ");

            }

          wrap_here ("  ");

        }

      printf_filtered ("\n\n");

    }

}

/* Print minimal symbols from this objfile.  */

static void

dump_msymbols (struct objfile *objfile, struct ui_file *outfile)

{

  struct gdbarch *gdbarch = get_objfile_arch (objfile);

  struct minimal_symbol *msymbol;

  int index;

  char ms_type;

  fprintf_filtered (outfile, "\nObject file %s:\n\n", objfile->name);

  if (objfile->minimal_symbol_count == 0)

    {

      fprintf_filtered (outfile, "No minimal symbols found.\n");

      return;

    }

  index = 0;

  ALL_OBJFILE_MSYMBOLS (objfile, msymbol)

    {

      struct obj_section *section = SYMBOL_OBJ_SECTION (msymbol);

      switch (MSYMBOL_TYPE (msymbol))

        {

        case mst_unknown:

          ms_type = 'u';

          break;

        case mst_text:

          ms_type = 'T';

          break;

        case mst_solib_trampoline:

          ms_type = 'S';

          break;

        case mst_data:

          ms_type = 'D';

          break;

        case mst_bss:

          ms_type = 'B';

          break;

        case mst_abs:

          ms_type = 'A';

          break;

        case mst_file_text:

          ms_type = 't';

          break;

        case mst_file_data:

          ms_type = 'd';

          break;

        case mst_file_bss:

          ms_type = 'b';

          break;

        default:

          ms_type = '?';

          break;

        }

      fprintf_filtered (outfile, "[%2d] %c ", index, ms_type);

      fputs_filtered (paddress (gdbarch, SYMBOL_VALUE_ADDRESS (msymbol)),

                      outfile);

      fprintf_filtered (outfile, " %s", SYMBOL_LINKAGE_NAME (msymbol));

      if (section)

        fprintf_filtered (outfile, " section %s",

                          bfd_section_name (objfile->obfd,

                                            section->the_bfd_section));

      if (SYMBOL_DEMANGLED_NAME (msymbol) != NULL)

        {

          fprintf_filtered (outfile, "  %s", SYMBOL_DEMANGLED_NAME (msymbol));

        }

      if (msymbol->filename)

        fprintf_filtered (outfile, "  %s", msymbol->filename);

      fputs_filtered ("\n", outfile);

      index++;

    }

  if (objfile->minimal_symbol_count != index)

    {

      warning (_("internal error:  minimal symbol count %d != %d"),

               objfile->minimal_symbol_count, index);

    }

  fprintf_filtered (outfile, "\n");

}

static void

dump_symtab_1 (struct objfile *objfile, struct symtab *symtab,

               struct ui_file *outfile)

{

  struct gdbarch *gdbarch = get_objfile_arch (objfile);

  int i;

  struct dict_iterator iter;

  int len;

  struct linetable *l;

  struct blockvector *bv;

  struct symbol *sym;

  struct block *b;

  int depth;

  fprintf_filtered (outfile, "\nSymtab for file %s\n", symtab->filename);

  if (symtab->dirname)

    fprintf_filtered (outfile, "Compilation directory is %s\n",

                      symtab->dirname);

  fprintf_filtered (outfile, "Read from object file %s (", objfile->name);

  gdb_print_host_address (objfile, outfile);

  fprintf_filtered (outfile, ")\n");

  fprintf_filtered (outfile, "Language: %s\n", language_str (symtab->language));

  /* First print the line table.  */

  l = LINETABLE (symtab);

  if (l)

    {

      fprintf_filtered (outfile, "\nLine table:\n\n");

      len = l->nitems;

      for (i = 0; i < len; i++)

        {

          fprintf_filtered (outfile, " line %d at ", l->item[i].line);

          fputs_filtered (paddress (gdbarch, l->item[i].pc), outfile);

          fprintf_filtered (outfile, "\n");

        }

    }

  /* Now print the block info, but only for primary symtabs since we will

     print lots of duplicate info otherwise. */

  if (symtab->primary)

    {

      fprintf_filtered (outfile, "\nBlockvector:\n\n");

      bv = BLOCKVECTOR (symtab);

      len = BLOCKVECTOR_NBLOCKS (bv);

      for (i = 0; i < len; i++)

        {

          b = BLOCKVECTOR_BLOCK (bv, i);

          depth = block_depth (b) * 2;

          print_spaces (depth, outfile);

          fprintf_filtered (outfile, "block #%03d, object at ", i);

          gdb_print_host_address (b, outfile);

          if (BLOCK_SUPERBLOCK (b))

            {

              fprintf_filtered (outfile, " under ");

              gdb_print_host_address (BLOCK_SUPERBLOCK (b), outfile);

            }

          /* drow/2002-07-10: We could save the total symbols count

             even if we're using a hashtable, but nothing else but this message

             wants it.  */

          fprintf_filtered (outfile, ", %d syms/buckets in ",

                            dict_size (BLOCK_DICT (b)));

          fputs_filtered (paddress (gdbarch, BLOCK_START (b)), outfile);

          fprintf_filtered (outfile, "..");

          fputs_filtered (paddress (gdbarch, BLOCK_END (b)), outfile);

          if (BLOCK_FUNCTION (b))

            {

              fprintf_filtered (outfile, ", function %s",

                                SYMBOL_LINKAGE_NAME (BLOCK_FUNCTION (b)));

              if (SYMBOL_DEMANGLED_NAME (BLOCK_FUNCTION (b)) != NULL)

                {

                  fprintf_filtered (outfile, ", %s",

                                SYMBOL_DEMANGLED_NAME (BLOCK_FUNCTION (b)));

                }

            }

          fprintf_filtered (outfile, "\n");

          /* Now print each symbol in this block (in no particular order, if

             we're using a hashtable).  */

          ALL_BLOCK_SYMBOLS (b, iter, sym)

            {

              struct print_symbol_args s;

              s.gdbarch = gdbarch;

              s.symbol = sym;

              s.depth = depth + 1;

              s.outfile = outfile;

              catch_errors (print_symbol, &s, "Error printing symbol:\n",

                            RETURN_MASK_ERROR);

            }

        }

      fprintf_filtered (outfile, "\n");

    }

  else

    {

      fprintf_filtered (outfile, "\nBlockvector same as previous symtab\n\n");

    }

}

static void

dump_symtab (struct objfile *objfile, struct symtab *symtab,

             struct ui_file *outfile)

{

  /* Set the current language to the language of the symtab we're dumping

     because certain routines used during dump_symtab() use the current

     language to print an image of the symbol.  We'll restore it later.

     But use only real languages, not placeholders.  */

  if (symtab->language != language_unknown

      && symtab->language != language_auto)

    {

      enum language saved_lang;

      saved_lang = set_language (symtab->language);

      dump_symtab_1 (objfile, symtab, outfile);

      set_language (saved_lang);

    }

  else

    dump_symtab_1 (objfile, symtab, outfile);

}

void

maintenance_print_symbols (char *args, int from_tty)

{

  char **argv;

  struct ui_file *outfile;

  struct cleanup *cleanups;

  char *symname = NULL;

  char *filename = DEV_TTY;

  struct objfile *objfile;

  struct symtab *s;

  dont_repeat ();

  if (args == NULL)

    {

      error (_("\

Arguments missing: an output file name and an optional symbol file name"));

    }

  argv = gdb_buildargv (args);

  cleanups = make_cleanup_freeargv (argv);

  if (argv[0] != NULL)

    {

      filename = argv[0];

      /* If a second arg is supplied, it is a source file name to match on */

      if (argv[1] != NULL)

        {

          symname = argv[1];

        }

    }

  filename = tilde_expand (filename);

  make_cleanup (xfree, filename);

  outfile = gdb_fopen (filename, FOPEN_WT);

  if (outfile == 0)

    perror_with_name (filename);

  make_cleanup_ui_file_delete (outfile);

  immediate_quit++;

  ALL_SYMTABS (objfile, s)

    if (symname == NULL || strcmp (symname, s->filename) == 0)

    dump_symtab (objfile, s, outfile);

  immediate_quit--;

  do_cleanups (cleanups);

}

/* Print symbol ARGS->SYMBOL on ARGS->OUTFILE.  ARGS->DEPTH says how

   far to indent.  ARGS is really a struct print_symbol_args *, but is

   declared as char * to get it past catch_errors.  Returns 0 for error,

   1 for success.  */

static int

print_symbol (void *args)

{

  struct gdbarch *gdbarch = ((struct print_symbol_args *) args)->gdbarch;

  struct symbol *symbol = ((struct print_symbol_args *) args)->symbol;

  int depth = ((struct print_symbol_args *) args)->depth;

  struct ui_file *outfile = ((struct print_symbol_args *) args)->outfile;

  struct obj_section *section = SYMBOL_OBJ_SECTION (symbol);

  print_spaces (depth, outfile);

  if (SYMBOL_DOMAIN (symbol) == LABEL_DOMAIN)

    {

      fprintf_filtered (outfile, "label %s at ", SYMBOL_PRINT_NAME (symbol));

      fputs_filtered (paddress (gdbarch, SYMBOL_VALUE_ADDRESS (symbol)),

                      outfile);

      if (section)

        fprintf_filtered (outfile, " section %s\n",

                          bfd_section_name (section->the_bfd_section->owner,

                                            section->the_bfd_section));

      else

        fprintf_filtered (outfile, "\n");

      return 1;

    }

  if (SYMBOL_DOMAIN (symbol) == STRUCT_DOMAIN)

    {

      if (TYPE_TAG_NAME (SYMBOL_TYPE (symbol)))

        {

          LA_PRINT_TYPE (SYMBOL_TYPE (symbol), "", outfile, 1, depth);

        }

      else

        {

          fprintf_filtered (outfile, "%s %s = ",

                         (TYPE_CODE (SYMBOL_TYPE (symbol)) == TYPE_CODE_ENUM

                          ? "enum"

                     : (TYPE_CODE (SYMBOL_TYPE (symbol)) == TYPE_CODE_STRUCT

                        ? "struct" : "union")),

                            SYMBOL_LINKAGE_NAME (symbol));

          LA_PRINT_TYPE (SYMBOL_TYPE (symbol), "", outfile, 1, depth);

        }

      fprintf_filtered (outfile, ";\n");

    }

  else

    {

      if (SYMBOL_CLASS (symbol) == LOC_TYPEDEF)

        fprintf_filtered (outfile, "typedef ");

      if (SYMBOL_TYPE (symbol))

        {

          /* Print details of types, except for enums where it's clutter.  */

          LA_PRINT_TYPE (SYMBOL_TYPE (symbol), SYMBOL_PRINT_NAME (symbol),

                         outfile,

                         TYPE_CODE (SYMBOL_TYPE (symbol)) != TYPE_CODE_ENUM,

                         depth);

          fprintf_filtered (outfile, "; ");

        }

      else

        fprintf_filtered (outfile, "%s ", SYMBOL_PRINT_NAME (symbol));

      switch (SYMBOL_CLASS (symbol))

        {

        case LOC_CONST:

          fprintf_filtered (outfile, "const %ld (0x%lx)",

                            SYMBOL_VALUE (symbol),

                            SYMBOL_VALUE (symbol));

          break;

        case LOC_CONST_BYTES:

          {

            unsigned i;

            struct type *type = check_typedef (SYMBOL_TYPE (symbol));

            fprintf_filtered (outfile, "const %u hex bytes:",

                              TYPE_LENGTH (type));

            for (i = 0; i < TYPE_LENGTH (type); i++)

              fprintf_filtered (outfile, " %02x",

                                (unsigned) SYMBOL_VALUE_BYTES (symbol)[i]);

          }

          break;

        case LOC_STATIC:

          fprintf_filtered (outfile, "static at ");

          fputs_filtered (paddress (gdbarch, SYMBOL_VALUE_ADDRESS (symbol)),

                          outfile);

          if (section)

            fprintf_filtered (outfile, " section %s",

                              bfd_section_name (section->the_bfd_section->owner,

                                                section->the_bfd_section));

          break;

        case LOC_REGISTER:

          if (SYMBOL_IS_ARGUMENT (symbol))

            fprintf_filtered (outfile, "parameter register %ld",

                              SYMBOL_VALUE (symbol));

          else

            fprintf_filtered (outfile, "register %ld", SYMBOL_VALUE (symbol));

          break;

        case LOC_ARG:

          fprintf_filtered (outfile, "arg at offset 0x%lx",

                            SYMBOL_VALUE (symbol));

          break;

        case LOC_REF_ARG:

          fprintf_filtered (outfile, "reference arg at 0x%lx", SYMBOL_VALUE (symbol));

          break;

        case LOC_REGPARM_ADDR:

          fprintf_filtered (outfile, "address parameter register %ld", SYMBOL_VALUE (symbol));

          break;

        case LOC_LOCAL:

          fprintf_filtered (outfile, "local at offset 0x%lx",

                            SYMBOL_VALUE (symbol));

          break;

        case LOC_TYPEDEF:

          break;

        case LOC_LABEL:

          fprintf_filtered (outfile, "label at ");

          fputs_filtered (paddress (gdbarch, SYMBOL_VALUE_ADDRESS (symbol)),

                          outfile);

          if (section)

            fprintf_filtered (outfile, " section %s",

                              bfd_section_name (section->the_bfd_section->owner,

                                                section->the_bfd_section));

          break;

        case LOC_BLOCK:

          fprintf_filtered (outfile, "block object ");

          gdb_print_host_address (SYMBOL_BLOCK_VALUE (symbol), outfile);

          fprintf_filtered (outfile, ", ");

          fputs_filtered (paddress (gdbarch,

                                    BLOCK_START (SYMBOL_BLOCK_VALUE (symbol))),

                          outfile);

          fprintf_filtered (outfile, "..");

          fputs_filtered (paddress (gdbarch,

                                    BLOCK_END (SYMBOL_BLOCK_VALUE (symbol))),

                          outfile);

          if (section)

            fprintf_filtered (outfile, " section %s",

                              bfd_section_name (section->the_bfd_section->owner,

                                                section->the_bfd_section));

          break;

        case LOC_COMPUTED:

          fprintf_filtered (outfile, "computed at runtime");

          break;

        case LOC_UNRESOLVED:

          fprintf_filtered (outfile, "unresolved");

          break;

        case LOC_OPTIMIZED_OUT:

          fprintf_filtered (outfile, "optimized out");

          break;

        default:

          fprintf_filtered (outfile, "botched symbol class %x",

                            SYMBOL_CLASS (symbol));

          break;

        }

    }

  fprintf_filtered (outfile, "\n");

  return 1;

}

void

maintenance_print_msymbols (char *args, int from_tty)

{

  char **argv;

  struct ui_file *outfile;

  struct cleanup *cleanups;

  char *filename = DEV_TTY;

  char *symname = NULL;