5a21a8c4dd
Instead of globally waiting for completion of strong nmethod processing during evacuation, synchronize the nmethods processing on a per-nmethod basis so that only one thread processes one nmethod at once using a state. This state indicates what work (strong/weak processing) needs to be done and what has already been done. Reviewed-by: sjohanss, kbarrett
89 lines
2.5 KiB
C++
89 lines
2.5 KiB
C++
/*
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* Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_GC_G1_G1CODEBLOBCLOSURE_HPP
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#define SHARE_GC_G1_G1CODEBLOBCLOSURE_HPP
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#include "gc/g1/g1CollectedHeap.hpp"
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#include "memory/iterator.hpp"
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class G1ConcurrentMark;
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class nmethod;
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class G1CodeBlobClosure : public CodeBlobClosure {
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// Gather nmethod remembered set entries.
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class HeapRegionGatheringOopClosure : public OopClosure {
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G1CollectedHeap* _g1h;
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OopClosure* _work;
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nmethod* _nm;
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template <typename T>
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void do_oop_work(T* p);
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public:
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HeapRegionGatheringOopClosure(OopClosure* oc) : _g1h(G1CollectedHeap::heap()), _work(oc), _nm(NULL) {}
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void do_oop(oop* o);
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void do_oop(narrowOop* o);
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void set_nm(nmethod* nm) {
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_nm = nm;
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}
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};
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// Mark all oops below TAMS.
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class MarkingOopClosure : public OopClosure {
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G1ConcurrentMark* _cm;
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uint _worker_id;
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template <typename T>
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void do_oop_work(T* p);
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public:
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MarkingOopClosure(uint worker_id);
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void do_oop(oop* o);
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void do_oop(narrowOop* o);
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};
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HeapRegionGatheringOopClosure _oc;
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MarkingOopClosure _marking_oc;
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bool _strong;
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void do_code_blob_weak(CodeBlob* cb);
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void do_code_blob_strong(CodeBlob* cb);
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public:
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G1CodeBlobClosure(uint worker_id, OopClosure* oc, bool strong) :
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_oc(oc), _marking_oc(worker_id), _strong(strong) { }
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void do_evacuation_and_fixup(nmethod* nm);
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void do_marking(nmethod* nm);
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void do_code_blob(CodeBlob* cb);
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};
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#endif // SHARE_GC_G1_G1CODEBLOBCLOSURE_HPP
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