1 /* 2 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_GC_G1_G1ROOTCLOSURESET_HPP 26 #define SHARE_VM_GC_G1_G1ROOTCLOSURESET_HPP 27 28 #include "memory/allocation.hpp" 29 #include "memory/iterator.hpp" 30 31 class G1CollectedHeap; 32 class G1ParScanThreadState; 33 34 class G1RootClosures : public CHeapObj<mtGC> { 35 public: 36 // Closures to process raw oops in the root set. 37 virtual OopClosure* weak_oops() = 0; 38 virtual OopClosure* strong_oops() = 0; 39 40 // Closures to process CLDs in the root set. 41 virtual CLDClosure* weak_clds() = 0; 42 virtual CLDClosure* strong_clds() = 0; 43 44 // Applied to code blobs reachable as strong roots. 45 virtual CodeBlobClosure* strong_codeblobs() = 0; 46 }; 47 48 class G1EvacuationRootClosures : public G1RootClosures { 49 static G1EvacuationRootClosures* create_root_closures_ext(G1ParScanThreadState* pss, G1CollectedHeap* g1h); 50 public: 51 // Flush any buffered state and deferred processing 52 virtual void flush() = 0; 53 virtual double closure_app_seconds() = 0; 54 55 // Applied to the weakly reachable CLDs when all strongly reachable 56 // CLDs are guaranteed to have been processed. 57 virtual CLDClosure* second_pass_weak_clds() = 0; 58 59 // Get a raw oop closure for processing oops, bypassing the flushing above. 60 virtual OopClosure* raw_strong_oops() = 0; 61 62 // Applied to code blobs treated as weak roots. 63 virtual CodeBlobClosure* weak_codeblobs() = 0; 64 65 // Is this closure used for tracing metadata? 66 virtual bool trace_metadata() = 0; 67 68 static G1EvacuationRootClosures* create_root_closures(G1ParScanThreadState* pss, G1CollectedHeap* g1h); 69 }; 70 71 #endif // SHARE_VM_GC_G1_G1ROOTCLOSURESET_HPP