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Date: Thu, 3 Sep 2009 14:10:06 GMT
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To: freebsd-standards@FreeBSD.org
From: Kostik Belousov <kostikbel@gmail.com>
Cc: 
Subject: Re: standards/138307: posix_memalign has incorrect behaviour if
	size == 0
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The following reply was made to PR standards/138307; it has been noted by GNATS.

From: Kostik Belousov <kostikbel@gmail.com>
To: =?koi8-r?Q?Rafa=EBl_Carr=E9?= <rafael.carre@gmail.com>
Cc: bug-followup@freebsd.org
Subject: Re: standards/138307: posix_memalign has incorrect behaviour if size == 0
Date: Thu, 3 Sep 2009 16:44:38 +0300

 The following patch should help.
 
 diff --git a/lib/libc/stdlib/malloc.c b/lib/libc/stdlib/malloc.c
 index 270d641..b56b003 100644
 --- a/lib/libc/stdlib/malloc.c
 +++ b/lib/libc/stdlib/malloc.c
 @@ -5320,6 +5320,15 @@ posix_memalign(void **memptr, size_t alignment, size_t size)
  			goto RETURN;
  		}
  
 +		if (size == 0) {
 +			if (opt_sysv == false)
 +				size = 1;
 +			else {
 +				result = NULL;
 +				ret = 0;
 +				goto RETURN;
 +			}
 +		}
  		result = ipalloc(alignment, size);
  	}