From: Brian Norris <banorris@uci.edu>
Date: Fri, 19 Oct 2012 22:27:37 +0000 (-0700)
Subject: model: fix - RMW cannot break release sequences
X-Git-Tag: pldi2013~43
X-Git-Url: http://demsky.eecs.uci.edu/git/?p=model-checker.git;a=commitdiff_plain;h=7f9eb951a3ee0443169dd21ddc914df4a04c9aab

model: fix - RMW cannot break release sequences

I misinterpreted the spec's description of release sequences.
---

diff --git a/model.cc b/model.cc
index 2aaa1c2..134e457 100644
--- a/model.cc
+++ b/model.cc
@@ -1509,8 +1509,8 @@ bool ModelChecker::release_seq_heads(const ModelAction *rf,
 				continue;
 			}
 
-			/* Only writes can break release sequences */
-			if (!act->is_write())
+			/* Only non-RMW writes can break release sequences */
+			if (!act->is_write() || act->is_rmw())
 				continue;
 
 			/* Check modification order */