From: Jarkko Hietaniemi <jhi@iki.fi>
Date: Mon, 28 Jul 2003 04:55:42 +0000 (+0000)
Subject: More clarification about the hash randomisation defines.
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=d10dc2ae49cc86b60fcfeb2fbd54ff9f07d3ccc3;p=p5sagit%2Fp5-mst-13.2.git

More clarification about the hash randomisation defines.

p4raw-id: //depot/perl@20252
---

diff --git a/perl.h b/perl.h
index 8b50836..2e6a9f0 100644
--- a/perl.h
+++ b/perl.h
@@ -2256,7 +2256,12 @@ typedef        struct crypt_data {     /* straight from /usr/include/crypt.h */
 #  include "iperlsys.h"
 #endif
 
-/* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0 */
+/* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0.
+ * Note that the USE_HASH_SEED and USE_HASH_SEED_EXPLICIT are *NOT*
+ * defined by Configure, despite their names being similar to the
+ * other defines like USE_ITHREADS.  Configure in fact knows nothing
+ * about the randomised hashes.  Therefore to enable/disable the hash
+ * randomisation defines use the Configure -Accflags=... instead. */
 #if !defined(NO_HASH_SEED) && !defined(USE_HASH_SEED) && !defined(USE_HASH_SEED_EXPLICIT)
 #  define USE_HASH_SEED
 #endif