The Tor Browser / file revision

 --- a/evutil_rand.c	2012-08-02 10:36:53.000000000 -0500

 +++ b/evutil_rand.c	2013-02-20 13:01:45.000000000 -0600

 @@ -58,27 +58,16 @@ evutil_secure_rng_global_setup_locks_(co

  static void

  ev_arc4random_buf(void *buf, size_t n)

  {

  #if defined(_EVENT_HAVE_ARC4RANDOM_BUF) && !defined(__APPLE__)

  	return arc4random_buf(buf, n);

  #else

  	unsigned char *b = buf;

 -#if defined(_EVENT_HAVE_ARC4RANDOM_BUF)

 -	/* OSX 10.7 introducd arc4random_buf, so if you build your program

 -	 * there, you'll get surprised when older versions of OSX fail to run.

 -	 * To solve this, we can check whether the function pointer is set,

 -	 * and fall back otherwise.  (OSX does this using some linker

 -	 * trickery.)

 -	 */

 -	if (arc4random_buf != NULL) {

 -		return arc4random_buf(buf, n);

 -	}

 -#endif

  	/* Make sure that we start out with b at a 4-byte alignment; plenty

  	 * of CPUs care about this for 32-bit access. */

  	if (n >= 4 && ((ev_uintptr_t)b) & 3) {

  		ev_uint32_t u = arc4random();

  		int n_bytes = 4 - (((ev_uintptr_t)b) & 3);

  		memcpy(b, &u, n_bytes);

  		b += n_bytes;

  		n -= n_bytes;