From: Paul Eggert <eggert@cs.ucla.edu>
Date: Wed, 17 Nov 2004 22:48:23 +0000 (+0000)
Subject: (rpl_realloc): Call 'free' if n==0, since realloc might fail.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2d2b5dbea1062240a7a8daec5c88722f2db556e2;p=pspp

(rpl_realloc): Call 'free' if n==0, since realloc might fail.
Problem reported by Yoann Vandoorselaere.
---

diff --git a/lib/realloc.c b/lib/realloc.c
index ccbf991388..14fec075f7 100644
--- a/lib/realloc.c
+++ b/lib/realloc.c
@@ -1,5 +1,5 @@
-/* Work around bug on some systems where realloc (NULL, 0) fails.
-   Copyright (C) 1997, 2003 Free Software Foundation, Inc.
+/* realloc() function that is glibc compatible.
+   Copyright (C) 1997, 2003, 2004 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -32,8 +32,15 @@ void *
 rpl_realloc (void *p, size_t n)
 {
   if (n == 0)
-    n = 1;
-  if (p == 0)
+    {
+      n = 1;
+
+      /* In theory realloc might fail, so don't rely on it to free.  */
+      free (p);
+      p = NULL;
+    }
+
+  if (p == NULL)
     return malloc (n);
   return realloc (p, n);
 }