3 files changed, 26 insertions, 9 deletions
diff --git a/support/ChangeLog b/support/ChangeLog
index ec54675a..bc535ea8 100644
--- a/support/ChangeLog
+++ b/support/ChangeLog
@@ -1,3 +1,10 @@
+2017-06-25         Andrew J. Schorr      <aschorr@telemetry-investments.com>
+
+	* dfa.c (dfaalloc): Replace xmalloc+memset with xzalloc.
+	* xalloc.h (xmalloc): New function moved here from gawkmisc.c.
+	(xcalloc): Replace xmalloc+memset with calloc.
+	(xzalloc): Replace xmalloc+memset with xcalloc.
+
 2017-06-22         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* regcomp.c, regex.c, regex.h, regex_internal.c, regex_internal.h,
diff --git a/support/dfa.c b/support/dfa.c
index 18c17a5d..3a675f5d 100644
--- a/support/dfa.c
+++ b/support/dfa.c
@@ -4062,12 +4062,7 @@ dfamustfree (struct dfamust *dm)
 struct dfa *
 dfaalloc (void)
 {
-  void *p = xmalloc (sizeof (struct dfa));
-  if (p)
-    {
-      memset (p, 0, sizeof (struct dfa));
-    }
-  return p;
+  return xzalloc (sizeof (struct dfa));
 }
 
 /* Initialize DFA.  */
diff --git a/support/xalloc.h b/support/xalloc.h
index 0d169cf9..89dbe2c1 100644
--- a/support/xalloc.h
+++ b/support/xalloc.h
@@ -138,6 +138,17 @@ xnmalloc (size_t n, size_t s)
 #include <errno.h>
 extern void r_fatal(const char *msg, ...) ATTRIBUTE_NORETURN ;
 
+void *
+xmalloc(size_t bytes)
+{
+  void *p;
+  if (bytes == 0)
+    bytes = 1;	/* avoid dfa.c mishegos */
+  if ((p = malloc(bytes)) == NULL)
+    xalloc_die ();
+  return p;
+}
+
 /* Allocate an array of N objects, each with S bytes of memory,
    dynamically, with error checking.  S must be nonzero.
    Clear the contents afterwards.  */
@@ -145,8 +156,12 @@ extern void r_fatal(const char *msg, ...) ATTRIBUTE_NORETURN ;
 void *
 xcalloc(size_t nmemb, size_t size)
 {
-  void *p = xmalloc (nmemb * size);
-  memset(p, '\0', nmemb * size);
+  void *p;
+
+  if (nmemb == 0 || size == 0)
+    nmemb = size = 1; 	/* avoid dfa.c mishegos */
+  if ((p = calloc(nmemb, size)) == NULL)
+    xalloc_die ();
   return p;
 }
 
@@ -314,7 +329,7 @@ xcharalloc (size_t n)
 inline void *
 xzalloc (size_t s)
 {
-  return memset (xmalloc (s), 0, s);
+  return xcalloc(1, s);
 }
 
 # endif