Add Bruno's comment justifying use of volatile.

[gnulib.git] / lib / alloca.c

diff --git a/lib/alloca.c b/lib/alloca.c
index 10e5d65..55a8067 100644 (file)
--- a/lib/alloca.c
+++ b/lib/alloca.c
@@ -25,6 +25,13 @@
 # include <config.h>
 #endif
 
+#if HAVE_STRING_H
+# include <string.h>
+#endif
+#if HAVE_STDLIB_H
+# include <stdlib.h>
+#endif
+
 #ifdef emacs
 # include "blockinput.h"
 #endif
@@ -161,8 +168,7 @@ static header *last_alloca_header = NULL;   /* -> last alloca header.  */
    implementations of C, for example under Gould's UTX/32.  */
 
 pointer
-alloca (size)
-     unsigned size;
+alloca (unsigned size)
 {
   auto char probe;             /* Probes stack depth: */
   register char *depth = ADDRESS_FUNCTION (probe);
@@ -211,6 +217,9 @@ alloca (size)
     register pointer new = malloc (sizeof (header) + size);
     /* Address of header.  */
 
+    if (new == 0)
+      abort();
+
     ((header *) new)->h.next = last_alloca_header;
     ((header *) new)->h.deep = depth;