1.1 --- a/src/share/vm/memory/gcLocker.hpp Wed Jun 10 14:57:21 2009 -0700
1.2 +++ b/src/share/vm/memory/gcLocker.hpp Thu Jun 11 12:40:00 2009 -0700
1.3 @@ -242,6 +242,31 @@
1.4 #endif
1.5 };
1.6
1.7 +// A SkipGCALot object is used to elide the usual effect of gc-a-lot
1.8 +// over a section of execution by a thread. Currently, it's used only to
1.9 +// prevent re-entrant calls to GC.
1.10 +class SkipGCALot : public StackObj {
1.11 + private:
1.12 + bool _saved;
1.13 + Thread* _t;
1.14 +
1.15 + public:
1.16 +#ifdef ASSERT
1.17 + SkipGCALot(Thread* t) : _t(t) {
1.18 + _saved = _t->skip_gcalot();
1.19 + _t->set_skip_gcalot(true);
1.20 + }
1.21 +
1.22 + ~SkipGCALot() {
1.23 + assert(_t->skip_gcalot(), "Save-restore protocol invariant");
1.24 + _t->set_skip_gcalot(_saved);
1.25 + }
1.26 +#else
1.27 + SkipGCALot(Thread* t) { }
1.28 + ~SkipGCALot() { }
1.29 +#endif
1.30 +};
1.31 +
1.32 // JRT_LEAF currently can be called from either _thread_in_Java or
1.33 // _thread_in_native mode. In _thread_in_native, it is ok
1.34 // for another thread to trigger GC. The rest of the JRT_LEAF
