| /* memory allocation routines with error checking. |
| Copyright (C) 1989-2022 Free Software Foundation, Inc. |
| |
| This file is part of the libiberty library. |
| Libiberty is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Library General Public |
| License as published by the Free Software Foundation; either |
| version 2 of the License, or (at your option) any later version. |
| |
| Libiberty 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 |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library General Public |
| License along with libiberty; see the file COPYING.LIB. If |
| not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
| Boston, MA 02110-1301, USA. */ |
| |
| /* |
| |
| @deftypefn Replacement void* xmalloc (size_t) |
| |
| Allocate memory without fail. If @code{malloc} fails, this will print |
| a message to @code{stderr} (using the name set by |
| @code{xmalloc_set_program_name}, |
| if any) and then call @code{xexit}. Note that it is therefore safe for |
| a program to contain @code{#define malloc xmalloc} in its source. |
| |
| @end deftypefn |
| |
| @deftypefn Replacement void* xrealloc (void *@var{ptr}, size_t @var{size}) |
| Reallocate memory without fail. This routine functions like @code{realloc}, |
| but will behave the same as @code{xmalloc} if memory cannot be found. |
| |
| @end deftypefn |
| |
| @deftypefn Replacement void* xcalloc (size_t @var{nelem}, size_t @var{elsize}) |
| |
| Allocate memory without fail, and set it to zero. This routine functions |
| like @code{calloc}, but will behave the same as @code{xmalloc} if memory |
| cannot be found. |
| |
| @end deftypefn |
| |
| @deftypefn Replacement void xmalloc_set_program_name (const char *@var{name}) |
| |
| You can use this to set the name of the program used by |
| @code{xmalloc_failed} when printing a failure message. |
| |
| @end deftypefn |
| |
| @deftypefn Replacement void xmalloc_failed (size_t) |
| |
| This function is not meant to be called by client code, and is listed |
| here for completeness only. If any of the allocation routines fail, this |
| function will be called to print an error message and terminate execution. |
| |
| @end deftypefn |
| |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| #include "ansidecl.h" |
| #include "libiberty.h" |
| #include "environ.h" |
| |
| #include <stdio.h> |
| |
| #include <stddef.h> |
| |
| #if VMS |
| #include <stdlib.h> |
| #include <unixlib.h> |
| #else |
| /* For systems with larger pointers than ints, these must be declared. */ |
| # if HAVE_STDLIB_H && HAVE_UNISTD_H && HAVE_DECL_MALLOC \ |
| && HAVE_DECL_REALLOC && HAVE_DECL_CALLOC && HAVE_DECL_SBRK |
| # include <stdlib.h> |
| # include <unistd.h> |
| # else |
| # ifdef __cplusplus |
| extern "C" { |
| # endif /* __cplusplus */ |
| void *malloc (size_t); |
| void *realloc (void *, size_t); |
| void *calloc (size_t, size_t); |
| #ifdef HAVE_SBRK |
| void *sbrk (ptrdiff_t); |
| #endif |
| # ifdef __cplusplus |
| } |
| # endif /* __cplusplus */ |
| # endif /* HAVE_STDLIB_H ... */ |
| #endif /* VMS */ |
| |
| /* The program name if set. */ |
| static const char *name = ""; |
| |
| #ifdef HAVE_SBRK |
| /* The initial sbrk, set when the program name is set. Not used for win32 |
| ports other than cygwin32. */ |
| static char *first_break = NULL; |
| #endif /* HAVE_SBRK */ |
| |
| void |
| xmalloc_set_program_name (const char *s) |
| { |
| name = s; |
| #ifdef HAVE_SBRK |
| /* Win32 ports other than cygwin32 don't have brk() */ |
| if (first_break == NULL) |
| first_break = (char *) sbrk (0); |
| #endif /* HAVE_SBRK */ |
| } |
| |
| void |
| xmalloc_failed (size_t size) |
| { |
| #ifdef HAVE_SBRK |
| size_t allocated; |
| |
| if (first_break != NULL) |
| allocated = (char *) sbrk (0) - first_break; |
| else |
| allocated = (char *) sbrk (0) - (char *) &environ; |
| fprintf (stderr, |
| "\n%s%sout of memory allocating %lu bytes after a total of %lu bytes\n", |
| name, *name ? ": " : "", |
| (unsigned long) size, (unsigned long) allocated); |
| #else /* HAVE_SBRK */ |
| fprintf (stderr, |
| "\n%s%sout of memory allocating %lu bytes\n", |
| name, *name ? ": " : "", |
| (unsigned long) size); |
| #endif /* HAVE_SBRK */ |
| xexit (1); |
| } |
| |
| void * |
| xmalloc (size_t size) |
| { |
| void *newmem; |
| |
| if (size == 0) |
| size = 1; |
| newmem = malloc (size); |
| if (!newmem) |
| xmalloc_failed (size); |
| |
| return (newmem); |
| } |
| |
| void * |
| xcalloc (size_t nelem, size_t elsize) |
| { |
| void *newmem; |
| |
| if (nelem == 0 || elsize == 0) |
| nelem = elsize = 1; |
| |
| newmem = calloc (nelem, elsize); |
| if (!newmem) |
| xmalloc_failed (nelem * elsize); |
| |
| return (newmem); |
| } |
| |
| void * |
| xrealloc (void *oldmem, size_t size) |
| { |
| void *newmem; |
| |
| if (size == 0) |
| size = 1; |
| if (!oldmem) |
| newmem = malloc (size); |
| else |
| newmem = realloc (oldmem, size); |
| if (!newmem) |
| xmalloc_failed (size); |
| |
| return (newmem); |
| } |