svn commit: r196861 - head/lib/libc/stdlib

[Konstantin Belousov]

Author: kib
Date: Sat Sep  5 13:32:05 2009
New Revision: 196861
URL: http://svn.freebsd.org/changeset/base/196861

Log:
  Handle zero size for posix_memalign. Return NULL or unique address
  according to the 'V' option.
  
  PR:	standards/138307
  MFC after:	1 week

Modified:
  head/lib/libc/stdlib/malloc.c

Modified: head/lib/libc/stdlib/malloc.c
==============================================================================
--- head/lib/libc/stdlib/malloc.c	Sat Sep  5 13:31:16 2009	(r196860)
+++ head/lib/libc/stdlib/malloc.c	Sat Sep  5 13:32:05 2009	(r196861)
@@ -5320,6 +5320,15 @@ posix_memalign(void **memptr, size_t ali
 			goto RETURN;
 		}
 
+		if (size == 0) {
+			if (opt_sysv == false)
+				size = 1;
+			else {
+				result = NULL;
+				ret = 0;
+				goto RETURN;
+			}
+		}
 		result = ipalloc(alignment, size);
 	}