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$NetBSD: patch-js__src__jscntxt.h,v 1.2 2013/06/26 11:32:12 ryoon Exp $
From bugzilla, bug 840242, attachment v1
Use the runtime page size to control arena decommit.
As a side effect, this removes the hard coded page-size == 4k requirement.
diff js/src/jscntxt.h js/src/jscntxt.h
--- js/src/jscntxt.h.orig 2013-06-17 22:13:11.000000000 +0000
+++ js/src/jscntxt.h
@@ -1101,6 +1101,15 @@ struct JSRuntime : js::RuntimeFriendFiel
/* Stack of thread-stack-allocated GC roots. */
js::AutoGCRooter *autoGCRooters;
+ /*
+ * The GC can only safely decommit memory when the page size of the
+ * running process matches the compiled arena size.
+ */
+ size_t gcSystemPageSize;
+
+ /* The OS allocation granularity may not match the page size. */
+ size_t gcSystemAllocGranularity;
+
/* Strong references on scripts held for PCCount profiling API. */
js::ScriptAndCountsVector *scriptAndCountsVector;
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