1 files changed, 102 insertions, 0 deletions
diff --git a/libgfortran/runtime/memory.c b/libgfortran/runtime/memory.c
new file mode 100644
index 0000000000..98c59bb066
--- /dev/null
+++ b/libgfortran/runtime/memory.c
@@ -0,0 +1,102 @@
+/* Memory management routines.
+   Copyright (C) 2002-2017 Free Software Foundation, Inc.
+   Contributed by Paul Brook <paul@nowt.org>
+
+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 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.
+
+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.
+
+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/>.  */
+
+#include "libgfortran.h"
+#include <errno.h>
+
+#ifndef SIZE_MAX
+#define SIZE_MAX ((size_t)-1)
+#endif
+
+
+void *
+xmalloc (size_t n)
+{
+  void *p;
+
+  if (n == 0)
+    n = 1;
+
+  p = malloc (n);
+
+  if (p == NULL)
+    os_error ("Memory allocation failed");
+
+  return p;
+}
+
+
+void *
+xmallocarray (size_t nmemb, size_t size)
+{
+  void *p;
+
+  if (!nmemb || !size)
+    size = nmemb = 1;
+#define HALF_SIZE_T (((size_t) 1) << (__CHAR_BIT__ * sizeof (size_t) / 2))
+  else if (__builtin_expect ((nmemb | size) >= HALF_SIZE_T, 0)
+	   && nmemb > SIZE_MAX / size)
+    {
+      errno = ENOMEM;
+      os_error ("Integer overflow in xmallocarray");
+    }
+
+  p = malloc (nmemb * size);
+
+  if (!p)
+    os_error ("Memory allocation failed in xmallocarray");
+
+  return p;
+}
+
+
+/* calloc wrapper that aborts on error.  */
+
+void *
+xcalloc (size_t nmemb, size_t size)
+{
+  if (!nmemb || !size)
+    nmemb = size = 1;
+
+  void *p = calloc (nmemb, size);
+  if (!p)
+    os_error ("Allocating cleared memory failed");
+
+  return p;
+}
+
+
+void *
+xrealloc (void *ptr, size_t size)
+{
+  if (size == 0)
+    size = 1;
+
+  void *newp = realloc (ptr, size);
+  if (!newp)
+    os_error ("Memory allocation failure in xrealloc");
+
+  return newp;
+}