Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/jfr/leakprofiler/chains/rootSetClosure.cpp
src/share/vm/jfr/leakprofiler/chains/rootSetClosure.cpp
- changeset 9858
- b985cbb00e68
- child 9885
- 8e875c964f41
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| 9727:c7a3e57fdf4a | 9858:b985cbb00e68 |
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| 1 /* | |
| 2 * Copyright (c) 2014, 2018, 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/classLoaderData.hpp" | |
| 27 #include "classfile/systemDictionary.hpp" | |
| 28 #include "jfr/leakprofiler/chains/edgeQueue.hpp" | |
| 29 #include "jfr/leakprofiler/chains/rootSetClosure.hpp" | |
| 30 #include "jfr/leakprofiler/utilities/saveRestore.hpp" | |
| 31 #include "jfr/leakprofiler/utilities/unifiedOop.hpp" | |
| 32 #include "memory/universe.hpp" | |
| 33 #include "prims/jvmtiExport.hpp" | |
| 34 #include "runtime/jniHandles.hpp" | |
| 35 #include "runtime/synchronizer.hpp" | |
| 36 #include "runtime/thread.hpp" | |
| 37 #include "services/management.hpp" | |
| 38 #include "utilities/align.hpp" | |
| 39 | |
| 40 RootSetClosure::RootSetClosure(EdgeQueue* edge_queue) : | |
| 41 _edge_queue(edge_queue) { | |
| 42 } | |
| 43 | |
| 44 void RootSetClosure::do_oop(oop* ref) { | |
| 45 assert(ref != NULL, "invariant"); | |
| 46 // We discard unaligned root references because | |
| 47 // our reference tagging scheme will use | |
| 48 // the lowest bit in a represented reference | |
| 49 // to indicate the reference is narrow. | |
| 50 // It is mainly roots delivered via nmethods::do_oops() | |
| 51 // that come in unaligned. It should be ok to duck these | |
| 52 // since they are supposedly weak. | |
| 53 if (!is_aligned(ref, HeapWordSize)) { | |
| 54 return; | |
| 55 } | |
| 56 | |
| 57 assert(is_aligned(ref, HeapWordSize), "invariant"); | |
| 58 const oop pointee = *ref; | |
| 59 if (pointee != NULL) { | |
| 60 closure_impl(ref, pointee); | |
| 61 } | |
| 62 } | |
| 63 | |
| 64 void RootSetClosure::do_oop(narrowOop* ref) { | |
| 65 assert(ref != NULL, "invariant"); | |
| 66 assert(is_aligned(ref, sizeof(narrowOop)), "invariant"); | |
| 67 const oop pointee = oopDesc::load_decode_heap_oop(ref); | |
| 68 if (pointee != NULL) { | |
| 69 closure_impl(UnifiedOop::encode(ref), pointee); | |
| 70 } | |
| 71 } | |
| 72 | |
| 73 void RootSetClosure::closure_impl(const oop* reference, const oop pointee) { | |
| 74 if (!_edge_queue->is_full()) { | |
| 75 _edge_queue->add(NULL, reference); | |
| 76 } | |
| 77 } | |
| 78 | |
| 79 void RootSetClosure::add_to_queue(EdgeQueue* edge_queue) { | |
| 80 RootSetClosure rs(edge_queue); | |
| 81 process_roots(&rs); | |
| 82 } | |
| 83 | |
| 84 class RootSetClosureMarkScope : public MarkingCodeBlobClosure::MarkScope { | |
| 85 }; | |
| 86 | |
| 87 void RootSetClosure::process_roots(OopClosure* closure) { | |
| 88 SaveRestoreCLDClaimBits save_restore_cld_claim_bits; | |
| 89 RootSetClosureMarkScope mark_scope; | |
| 90 | |
| 91 CLDToOopClosure cldt_closure(closure); | |
| 92 ClassLoaderDataGraph::always_strong_cld_do(&cldt_closure); | |
| 93 CodeBlobToOopClosure blobs(closure, false); | |
| 94 Threads::oops_do(closure, NULL, &blobs); // XXX set CLDClosure to NULL | |
| 95 ObjectSynchronizer::oops_do(closure); | |
| 96 Universe::oops_do(closure); | |
| 97 JNIHandles::oops_do(closure); | |
| 98 JvmtiExport::oops_do(closure); | |
| 99 SystemDictionary::oops_do(closure); | |
| 100 Management::oops_do(closure); | |
| 101 StringTable::oops_do(closure); | |
| 102 } |
