1 /* 2 * Copyright (c) 2001, 2009, 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 # include "incls/_precompiled.incl" 26 # include "incls/_referenceProcessor.cpp.incl" 27 28 ReferencePolicy* ReferenceProcessor::_always_clear_soft_ref_policy = NULL; 29 ReferencePolicy* ReferenceProcessor::_default_soft_ref_policy = NULL; 30 oop ReferenceProcessor::_sentinelRef = NULL; 31 const int subclasses_of_ref = REF_PHANTOM - REF_OTHER; 32 33 // List of discovered references. 34 class DiscoveredList { 35 public: 36 DiscoveredList() : _len(0), _compressed_head(0), _oop_head(NULL) { } 37 oop head() const { 38 return UseCompressedOops ? oopDesc::decode_heap_oop_not_null(_compressed_head) : 39 _oop_head; 40 } 41 HeapWord* adr_head() { 42 return UseCompressedOops ? (HeapWord*)&_compressed_head : 43 (HeapWord*)&_oop_head; 44 } 45 void set_head(oop o) { 46 if (UseCompressedOops) { | 1 /* 2 * Copyright (c) 2001, 2010, 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 #include "precompiled.hpp" 26 #include "classfile/javaClasses.hpp" 27 #include "classfile/systemDictionary.hpp" 28 #include "gc_interface/collectedHeap.hpp" 29 #include "gc_interface/collectedHeap.inline.hpp" 30 #include "memory/referencePolicy.hpp" 31 #include "memory/referenceProcessor.hpp" 32 #include "oops/oop.inline.hpp" 33 #include "runtime/java.hpp" 34 #include "runtime/jniHandles.hpp" 35 36 ReferencePolicy* ReferenceProcessor::_always_clear_soft_ref_policy = NULL; 37 ReferencePolicy* ReferenceProcessor::_default_soft_ref_policy = NULL; 38 oop ReferenceProcessor::_sentinelRef = NULL; 39 const int subclasses_of_ref = REF_PHANTOM - REF_OTHER; 40 41 // List of discovered references. 42 class DiscoveredList { 43 public: 44 DiscoveredList() : _len(0), _compressed_head(0), _oop_head(NULL) { } 45 oop head() const { 46 return UseCompressedOops ? oopDesc::decode_heap_oop_not_null(_compressed_head) : 47 _oop_head; 48 } 49 HeapWord* adr_head() { 50 return UseCompressedOops ? (HeapWord*)&_compressed_head : 51 (HeapWord*)&_oop_head; 52 } 53 void set_head(oop o) { 54 if (UseCompressedOops) { |