Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parNew/parOopClosures.hpp @ 1951:899bbbdcb6ea
6997298: fatal error: must own lock CMS_markBitMap_lock during heap dump
Summary: Since we are at a stop-world pause, the existing CMS-phase checks are sufficient for safety, and the locking check can be safely elided. Elaborated documentation comment to the case where class unloading and verification are disabled, and the query happens when we aren't in the sweeping phase, where the answer "false" would be (almost everywhere) too pessimistic.
Reviewed-by: jmasa, johnc, tonyp
| author | ysr |
|---|---|
| date | Fri, 05 Nov 2010 13:20:37 -0700 |
| parents | a93a9eda13f7 |
| children | f95d63e2154a |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1665 | 2 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 // Closures for ParNewGeneration | |
| 26 | |
| 27 class ParScanThreadState; | |
| 28 class ParNewGeneration; | |
| 1665 | 29 typedef Padded<OopTaskQueue> ObjToScanQueue; |
| 30 typedef GenericTaskQueueSet<ObjToScanQueue> ObjToScanQueueSet; | |
| 0 | 31 class ParallelTaskTerminator; |
| 32 | |
| 33 class ParScanClosure: public OopsInGenClosure { | |
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34 protected: |
| 0 | 35 ParScanThreadState* _par_scan_state; |
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36 ParNewGeneration* _g; |
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37 HeapWord* _boundary; |
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38 template <class T> void inline par_do_barrier(T* p); |
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39 template <class T> void inline do_oop_work(T* p, |
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40 bool gc_barrier, |
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41 bool root_scan); |
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42 public: |
| 0 | 43 ParScanClosure(ParNewGeneration* g, ParScanThreadState* par_scan_state); |
| 44 }; | |
| 45 | |
| 46 class ParScanWithBarrierClosure: public ParScanClosure { | |
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47 public: |
| 0 | 48 ParScanWithBarrierClosure(ParNewGeneration* g, |
| 49 ParScanThreadState* par_scan_state) : | |
| 50 ParScanClosure(g, par_scan_state) {} | |
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51 virtual void do_oop(oop* p); |
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52 virtual void do_oop(narrowOop* p); |
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53 inline void do_oop_nv(oop* p); |
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54 inline void do_oop_nv(narrowOop* p); |
| 0 | 55 }; |
| 56 | |
| 57 class ParScanWithoutBarrierClosure: public ParScanClosure { | |
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58 public: |
| 0 | 59 ParScanWithoutBarrierClosure(ParNewGeneration* g, |
| 60 ParScanThreadState* par_scan_state) : | |
| 61 ParScanClosure(g, par_scan_state) {} | |
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62 virtual void do_oop(oop* p); |
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63 virtual void do_oop(narrowOop* p); |
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64 inline void do_oop_nv(oop* p); |
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65 inline void do_oop_nv(narrowOop* p); |
| 0 | 66 }; |
| 67 | |
| 68 class ParRootScanWithBarrierTwoGensClosure: public ParScanClosure { | |
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69 public: |
| 0 | 70 ParRootScanWithBarrierTwoGensClosure(ParNewGeneration* g, |
| 71 ParScanThreadState* par_scan_state) : | |
| 72 ParScanClosure(g, par_scan_state) {} | |
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73 virtual void do_oop(oop* p); |
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74 virtual void do_oop(narrowOop* p); |
| 0 | 75 }; |
| 76 | |
| 77 class ParRootScanWithoutBarrierClosure: public ParScanClosure { | |
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78 public: |
| 0 | 79 ParRootScanWithoutBarrierClosure(ParNewGeneration* g, |
| 80 ParScanThreadState* par_scan_state) : | |
| 81 ParScanClosure(g, par_scan_state) {} | |
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82 virtual void do_oop(oop* p); |
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83 virtual void do_oop(narrowOop* p); |
| 0 | 84 }; |
| 85 | |
| 86 class ParScanWeakRefClosure: public ScanWeakRefClosure { | |
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87 protected: |
| 0 | 88 ParScanThreadState* _par_scan_state; |
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89 template <class T> inline void do_oop_work(T* p); |
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90 public: |
| 0 | 91 ParScanWeakRefClosure(ParNewGeneration* g, |
| 92 ParScanThreadState* par_scan_state); | |
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93 virtual void do_oop(oop* p); |
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94 virtual void do_oop(narrowOop* p); |
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95 inline void do_oop_nv(oop* p); |
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96 inline void do_oop_nv(narrowOop* p); |
| 0 | 97 }; |
| 98 | |
| 99 class ParEvacuateFollowersClosure: public VoidClosure { | |
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100 private: |
| 0 | 101 ParScanThreadState* _par_scan_state; |
| 102 ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
| 103 | |
| 104 // We want to preserve the specific types here (rather than "OopClosure") | |
| 105 // for later de-virtualization of do_oop calls. | |
| 106 ParScanWithoutBarrierClosure* _to_space_closure; | |
| 107 ParScanWithoutBarrierClosure* to_space_closure() { | |
| 108 return _to_space_closure; | |
| 109 } | |
| 110 ParRootScanWithoutBarrierClosure* _to_space_root_closure; | |
| 111 ParRootScanWithoutBarrierClosure* to_space_root_closure() { | |
| 112 return _to_space_root_closure; | |
| 113 } | |
| 114 | |
| 115 ParScanWithBarrierClosure* _old_gen_closure; | |
| 116 ParScanWithBarrierClosure* old_gen_closure () { | |
| 117 return _old_gen_closure; | |
| 118 } | |
| 119 ParRootScanWithBarrierTwoGensClosure* _old_gen_root_closure; | |
| 120 ParRootScanWithBarrierTwoGensClosure* old_gen_root_closure () { | |
| 121 return _old_gen_root_closure; | |
| 122 } | |
| 123 | |
| 124 ParNewGeneration* _par_gen; | |
| 125 ParNewGeneration* par_gen() { return _par_gen; } | |
| 126 | |
| 127 ObjToScanQueueSet* _task_queues; | |
| 128 ObjToScanQueueSet* task_queues() { return _task_queues; } | |
| 129 | |
| 130 ParallelTaskTerminator* _terminator; | |
| 131 ParallelTaskTerminator* terminator() { return _terminator; } | |
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132 public: |
| 0 | 133 ParEvacuateFollowersClosure( |
| 134 ParScanThreadState* par_scan_state_, | |
| 135 ParScanWithoutBarrierClosure* to_space_closure_, | |
| 136 ParScanWithBarrierClosure* old_gen_closure_, | |
| 137 ParRootScanWithoutBarrierClosure* to_space_root_closure_, | |
| 138 ParNewGeneration* par_gen_, | |
| 139 ParRootScanWithBarrierTwoGensClosure* old_gen_root_closure_, | |
| 140 ObjToScanQueueSet* task_queues_, | |
| 141 ParallelTaskTerminator* terminator_); | |
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142 virtual void do_void(); |
| 0 | 143 }; |