/* * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. *
*/
class G1CollectedHeap; class G1ParScanThreadState;
// Simple holder object for a complete set of closures used by the G1 evacuation code. template <bool should_mark> class G1SharedClosures { public:
G1ParCopyClosure<G1BarrierNone, should_mark> _oops;
G1ParCopyClosure<G1BarrierCLD, should_mark> _oops_in_cld; // We do not need (and actually should not) collect oops from nmethods into the // optional collection set as we already automatically collect the corresponding // nmethods in the region's code roots set. So set G1BarrierNoOptRoots in // this closure. // If these were present there would be opportunity for multiple threads to try // to change this oop* at the same time. Since embedded oops are not necessarily // word-aligned, this could lead to word tearing during update and crashes.
G1ParCopyClosure<G1BarrierNoOptRoots, should_mark> _oops_in_nmethod;
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