/* Memory management routines.
- Copyright 2002, 2005, 2006, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2002-2024 Free Software Foundation, Inc.
Contributed by Paul Brook <paul@nowt.org>
-This file is part of the GNU Fortran 95 runtime library (libgfortran).
+This file is part of the GNU Fortran runtime library (libgfortran).
Libgfortran 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 2 of the License, or (at your option) any later version.
-
-In addition to the permissions in the GNU General Public License, the
-Free Software Foundation gives you unlimited permission to link the
-compiled version of this file into combinations with other programs,
-and to distribute those combinations without any restriction coming
-from the use of this file. (The General Public License restrictions
-do apply in other respects; for example, they cover modification of
-the file, and distribution when not linked into a combine
-executable.)
+version 3 of the License, or (at your option) any later version.
Libgfortran 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 libgfortran; see the file COPYING. If not,
-write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-Boston, MA 02110-1301, USA. */
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
-#include "config.h"
-#include <stdlib.h>
-#include "libgfortran.h"
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+<http://www.gnu.org/licenses/>. */
-/* If GFC_CLEAR_MEMORY is defined, the memory allocation routines will
- return memory that is guaranteed to be set to zero. This can have
- a severe efficiency penalty, so it should never be set if good
- performance is desired, but it can help when you're debugging code. */
-/* #define GFC_CLEAR_MEMORY */
+#include "libgfortran.h"
+#include <errno.h>
-/* If GFC_CHECK_MEMORY is defined, we do some sanity checks at runtime.
- This causes small overhead, but again, it also helps debugging. */
-#define GFC_CHECK_MEMORY
void *
-get_mem (size_t n)
+xmalloc (size_t n)
{
void *p;
-#ifdef GFC_CLEAR_MEMORY
- p = (void *) calloc (1, n);
-#else
- p = (void *) malloc (n);
-#endif
+ if (n == 0)
+ n = 1;
+
+ p = malloc (n);
+
if (p == NULL)
os_error ("Memory allocation failed");
}
-void
-free_mem (void *p)
-{
- free (p);
-}
-
-
-/* Allocate memory for internal (compiler generated) use. */
-
void *
-internal_malloc_size (size_t size)
+xmallocarray (size_t nmemb, size_t size)
{
- if (size == 0)
- return NULL;
-
- return get_mem (size);
-}
-
+ void *p;
+ size_t prod;
-/* Reallocate internal memory MEM so it has SIZE bytes of data.
- Allocate a new block if MEM is zero, and free the block if
- SIZE is 0. */
+ if (!nmemb || !size)
+ prod = 1;
+ else if (__builtin_mul_overflow (nmemb, size, &prod))
+ {
+ errno = ENOMEM;
+ os_error ("Integer overflow in xmallocarray");
+ }
-extern void *internal_realloc (void *, index_type);
-export_proto(internal_realloc);
+ p = malloc (prod);
-void *
-internal_realloc (void *mem, index_type size)
-{
-#ifdef GFC_CHECK_MEMORY
- /* Under normal circumstances, this is _never_ going to happen! */
- if (size < 0)
- runtime_error ("Attempt to allocate a negative amount of memory.");
-#endif
- mem = realloc (mem, size);
- if (!mem && size != 0)
- os_error ("Out of memory.");
-
- if (size == 0)
- return NULL;
+ if (!p)
+ os_error ("Memory allocation failed in xmallocarray");
- return mem;
+ return p;
}
-/* User-allocate, one call for each member of the alloc-list of an
- ALLOCATE statement. */
-
-extern void *allocate (index_type, GFC_INTEGER_4 *) __attribute__ ((malloc));
-export_proto(allocate);
+/* calloc wrapper that aborts on error. */
void *
-allocate (index_type size, GFC_INTEGER_4 * stat)
+xcalloc (size_t nmemb, size_t size)
{
- void *newmem;
-
-#ifdef GFC_CHECK_MEMORY
- /* The only time this can happen is the size computed by the
- frontend wraps around. */
- if (size < 0)
- {
- if (stat)
- {
- *stat = ERROR_ALLOCATION;
- return NULL;
- }
- else
- runtime_error ("Attempt to allocate negative amount of memory. "
- "Possible integer overflow");
- }
-#endif
- newmem = malloc (size ? size : 1);
- if (!newmem)
- {
- if (stat)
- {
- *stat = ERROR_ALLOCATION;
- return newmem;
- }
- else
- runtime_error ("ALLOCATE: Out of memory.");
- }
+ if (!nmemb || !size)
+ nmemb = size = 1;
- if (stat)
- *stat = 0;
+ void *p = calloc (nmemb, size);
+ if (!p)
+ os_error ("Allocating cleared memory failed");
- return newmem;
+ return p;
}
-/* Function to call in an ALLOCATE statement when the argument is an
- allocatable array. If the array is currently allocated, it is
- an error to allocate it again. */
-
-extern void *allocate_array (void *, index_type, GFC_INTEGER_4 *);
-export_proto(allocate_array);
void *
-allocate_array (void *mem, index_type size, GFC_INTEGER_4 * stat)
-{
- if (mem == NULL)
- return allocate (size, stat);
- if (stat)
- {
- free (mem);
- mem = allocate (size, stat);
- *stat = ERROR_ALLOCATION;
- return mem;
- }
-
- runtime_error ("Attempting to allocate already allocated array.");
-}
-
-
-/* User-deallocate; pointer is then NULLified by the front-end. */
-
-extern void deallocate (void *, GFC_INTEGER_4 *);
-export_proto(deallocate);
-
-void
-deallocate (void *mem, GFC_INTEGER_4 * stat)
+xrealloc (void *ptr, size_t size)
{
- if (!mem)
- {
- if (stat)
- {
- *stat = 1;
- return;
- }
- else
- runtime_error ("Internal: Attempt to DEALLOCATE unallocated memory.");
- }
+ if (size == 0)
+ size = 1;
- free (mem);
+ void *newp = realloc (ptr, size);
+ if (!newp)
+ os_error ("Memory allocation failure in xrealloc");
- if (stat)
- *stat = 0;
+ return newp;
}
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