gdb/gdb_bfd.c

   1 /* Definitions for BFD wrappers used by GDB.
   2
   3    Copyright (C) 2011
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #include "defs.h"
  22 #include "gdb_bfd.h"
  23 #include "gdb_assert.h"
  24 #include "gdb_string.h"
  25
  26 /* See gdb_bfd.h.  */
  27
  28 void
  29 gdb_bfd_stash_filename (struct bfd *abfd)
  30 {
  31   char *name = bfd_get_filename (abfd);
  32   char *data;
  33
  34   data = bfd_alloc (abfd, strlen (name) + 1);
  35   strcpy (data, name);
  36
  37   /* Unwarranted chumminess with BFD.  */
  38   abfd->filename = data;
  39 }
  40
  41 /* Close ABFD, and warn if that fails.  */
  42
  43 static int
  44 gdb_bfd_close_or_warn (struct bfd *abfd)
  45 {
  46   int ret;
  47   char *name = bfd_get_filename (abfd);
  48
  49   ret = bfd_close (abfd);
  50
  51   if (!ret)
  52     warning (_("cannot close \"%s\": %s"),
  53              name, bfd_errmsg (bfd_get_error ()));
  54
  55   return ret;
  56 }
  57
  58 /* Add reference to ABFD.  Returns ABFD.  */
  59
  60 struct bfd *
  61 gdb_bfd_ref (struct bfd *abfd)
  62 {
  63   int *p_refcount;
  64
  65   if (abfd == NULL)
  66     return NULL;
  67
  68   p_refcount = bfd_usrdata (abfd);
  69
  70   if (p_refcount != NULL)
  71     {
  72       *p_refcount += 1;
  73       return abfd;
  74     }
  75
  76   p_refcount = xmalloc (sizeof (*p_refcount));
  77   *p_refcount = 1;
  78   bfd_usrdata (abfd) = p_refcount;
  79
  80   return abfd;
  81 }
  82
  83 /* Unreference and possibly close ABFD.  */
  84
  85 void
  86 gdb_bfd_unref (struct bfd *abfd)
  87 {
  88   int *p_refcount;
  89   char *name;
  90
  91   if (abfd == NULL)
  92     return;
  93
  94   p_refcount = bfd_usrdata (abfd);
  95   gdb_assert (*p_refcount >= 1);
  96
  97   *p_refcount -= 1;
  98   if (*p_refcount > 0)
  99     return;
 100
 101   xfree (p_refcount);
 102   bfd_usrdata (abfd) = NULL;  /* Paranoia.  */
 103
 104   name = bfd_get_filename (abfd);
 105   gdb_bfd_close_or_warn (abfd);
 106 }