gcc-4_9-mobile/libiberty/xmalloc.c

   1 /* memory allocation routines with error checking.
   2    Copyright 1989, 90, 91, 92, 93, 94 Free Software Foundation, Inc.
   3
   4 This file is part of the libiberty library.
   5 Libiberty is free software; you can redistribute it and/or
   6 modify it under the terms of the GNU Library General Public
   7 License as published by the Free Software Foundation; either
   8 version 2 of the License, or (at your option) any later version.
   9
  10 Libiberty is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 Library General Public License for more details.
  14
  15 You should have received a copy of the GNU Library General Public
  16 License along with libiberty; see the file COPYING.LIB.  If
  17 not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
  18 Boston, MA 02110-1301, USA.  */
  19
  20 /*
  21
  22 @deftypefn Replacement void* xmalloc (size_t)
  23
  24 Allocate memory without fail.  If @code{malloc} fails, this will print
  25 a message to @code{stderr} (using the name set by
  26 @code{xmalloc_set_program_name},
  27 if any) and then call @code{xexit}.  Note that it is therefore safe for
  28 a program to contain @code{#define malloc xmalloc} in its source.
  29
  30 @end deftypefn
  31
  32 @deftypefn Replacement void* xrealloc (void *@var{ptr}, size_t @var{size})
  33 Reallocate memory without fail.  This routine functions like @code{realloc},
  34 but will behave the same as @code{xmalloc} if memory cannot be found.
  35
  36 @end deftypefn
  37
  38 @deftypefn Replacement void* xcalloc (size_t @var{nelem}, size_t @var{elsize})
  39
  40 Allocate memory without fail, and set it to zero.  This routine functions
  41 like @code{calloc}, but will behave the same as @code{xmalloc} if memory
  42 cannot be found.
  43
  44 @end deftypefn
  45
  46 @deftypefn Replacement void xmalloc_set_program_name (const char *@var{name})
  47
  48 You can use this to set the name of the program used by
  49 @code{xmalloc_failed} when printing a failure message.
  50
  51 @end deftypefn
  52
  53 @deftypefn Replacement void xmalloc_failed (size_t)
  54
  55 This function is not meant to be called by client code, and is listed
  56 here for completeness only.  If any of the allocation routines fail, this
  57 function will be called to print an error message and terminate execution.
  58
  59 @end deftypefn
  60
  61 */
  62
  63 #ifdef HAVE_CONFIG_H
  64 #include "config.h"
  65 #endif
  66 #include "ansidecl.h"
  67 #include "libiberty.h"
  68
  69 #include <stdio.h>
  70
  71 #include <stddef.h>
  72
  73 #ifdef __APPLE__
  74 #include <crt_externs.h>
  75 #endif
  76
  77 #if VMS
  78 #include <stdlib.h>
  79 #include <unixlib.h>
  80 #else
  81 /* For systems with larger pointers than ints, these must be declared.  */
  82 #  if HAVE_STDLIB_H && HAVE_UNISTD_H && HAVE_DECL_MALLOC \
  83       && HAVE_DECL_REALLOC && HAVE_DECL_CALLOC && HAVE_DECL_SBRK
  84 #    include <stdlib.h>
  85 #    include <unistd.h>
  86 #  else
  87 #    ifdef __cplusplus
  88 extern "C" {
  89 #    endif /* __cplusplus */
  90 void *malloc (size_t);
  91 void *realloc (void *, size_t);
  92 void *calloc (size_t, size_t);
  93 void *sbrk (ptrdiff_t);
  94 #    ifdef __cplusplus
  95 }
  96 #    endif /* __cplusplus */
  97 #  endif /* HAVE_STDLIB_H ...  */
  98 #endif /* VMS */
  99
 100 /* The program name if set.  */
 101 static const char *name = "";
 102
 103 #ifdef HAVE_SBRK
 104 /* The initial sbrk, set when the program name is set. Not used for win32
 105    ports other than cygwin32.  */
 106 static char *first_break = NULL;
 107 #endif /* HAVE_SBRK */
 108
 109 void
 110 xmalloc_set_program_name (const char *s)
 111 {
 112   name = s;
 113 #ifdef HAVE_SBRK
 114   /* Win32 ports other than cygwin32 don't have brk() */
 115   if (first_break == NULL)
 116     first_break = (char *) sbrk (0);
 117 #endif /* HAVE_SBRK */
 118 }
 119
 120 void
 121 xmalloc_failed (size_t size)
 122 {
 123 #ifdef HAVE_SBRK
 124 #ifdef __APPLE__
 125   #define environ (*_NSGetEnviron())
 126 #else
 127   extern char **environ;
 128 #endif
 129   size_t allocated;
 130
 131   if (first_break != NULL)
 132     allocated = (char *) sbrk (0) - first_break;
 133   else
 134     allocated = (char *) sbrk (0) - (char *) &environ;
 135   fprintf (stderr,
 136            "\n%s%sout of memory allocating %lu bytes after a total of %lu bytes\n",
 137            name, *name ? ": " : "",
 138            (unsigned long) size, (unsigned long) allocated);
 139 #else /* HAVE_SBRK */
 140   fprintf (stderr,
 141            "\n%s%sout of memory allocating %lu bytes\n",
 142            name, *name ? ": " : "",
 143            (unsigned long) size);
 144 #endif /* HAVE_SBRK */
 145   xexit (1);
 146 }
 147
 148 PTR
 149 xmalloc (size_t size)
 150 {
 151   PTR newmem;
 152
 153   if (size == 0)
 154     size = 1;
 155   newmem = malloc (size);
 156   if (!newmem)
 157     xmalloc_failed (size);
 158
 159   return (newmem);
 160 }
 161
 162 PTR
 163 xcalloc (size_t nelem, size_t elsize)
 164 {
 165   PTR newmem;
 166
 167   if (nelem == 0 || elsize == 0)
 168     nelem = elsize = 1;
 169
 170   newmem = calloc (nelem, elsize);
 171   if (!newmem)
 172     xmalloc_failed (nelem * elsize);
 173
 174   return (newmem);
 175 }
 176
 177 PTR
 178 xrealloc (PTR oldmem, size_t size)
 179 {
 180   PTR newmem;
 181
 182   if (size == 0)
 183     size = 1;
 184   if (!oldmem)
 185     newmem = malloc (size);
 186   else
 187     newmem = realloc (oldmem, size);
 188   if (!newmem)
 189     xmalloc_failed (size);
 190
 191   return (newmem);
 192 }