Mercurial > hg > graal-compiler
annotate src/share/vm/memory/genOopClosures.inline.hpp @ 3992:d1bdeef3e3e2
7098282: G1: assert(interval >= 0) failed: Sanity check, referencePolicy.cpp: 76
Summary: There is a race between one thread successfully forwarding and copying the klass mirror for the SoftReference class (including the static master clock) and another thread attempting to use the master clock while attempting to discover a soft reference object. Maintain a shadow copy of the soft reference master clock and use the shadow during reference discovery and reference processing.
Reviewed-by: tonyp, brutisso, ysr
author | johnc |
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date | Wed, 12 Oct 2011 10:25:51 -0700 |
parents | f95d63e2154a |
children | da91efe96a93 |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2001, 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 * | |
1552
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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 | |
1972 | 25 #ifndef SHARE_VM_MEMORY_GENOOPCLOSURES_INLINE_HPP |
26 #define SHARE_VM_MEMORY_GENOOPCLOSURES_INLINE_HPP | |
27 | |
28 #include "memory/cardTableRS.hpp" | |
29 #include "memory/defNewGeneration.hpp" | |
30 #include "memory/genCollectedHeap.hpp" | |
31 #include "memory/genOopClosures.hpp" | |
32 #include "memory/genRemSet.hpp" | |
33 #include "memory/generation.hpp" | |
34 #include "memory/sharedHeap.hpp" | |
35 #include "memory/space.hpp" | |
36 | |
0 | 37 inline OopsInGenClosure::OopsInGenClosure(Generation* gen) : |
38 OopClosure(gen->ref_processor()), _orig_gen(gen), _rs(NULL) { | |
39 set_generation(gen); | |
40 } | |
41 | |
42 inline void OopsInGenClosure::set_generation(Generation* gen) { | |
43 _gen = gen; | |
44 _gen_boundary = _gen->reserved().start(); | |
45 // Barrier set for the heap, must be set after heap is initialized | |
46 if (_rs == NULL) { | |
47 GenRemSet* rs = SharedHeap::heap()->rem_set(); | |
48 assert(rs->rs_kind() == GenRemSet::CardTable, "Wrong rem set kind"); | |
49 _rs = (CardTableRS*)rs; | |
50 } | |
51 } | |
52 | |
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53 template <class T> inline void OopsInGenClosure::do_barrier(T* p) { |
0 | 54 assert(generation()->is_in_reserved(p), "expected ref in generation"); |
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55 T heap_oop = oopDesc::load_heap_oop(p); |
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56 assert(!oopDesc::is_null(heap_oop), "expected non-null oop"); |
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57 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
0 | 58 // If p points to a younger generation, mark the card. |
59 if ((HeapWord*)obj < _gen_boundary) { | |
60 _rs->inline_write_ref_field_gc(p, obj); | |
61 } | |
62 } | |
63 | |
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64 template <class T> inline void OopsInGenClosure::par_do_barrier(T* p) { |
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65 assert(generation()->is_in_reserved(p), "expected ref in generation"); |
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66 T heap_oop = oopDesc::load_heap_oop(p); |
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67 assert(!oopDesc::is_null(heap_oop), "expected non-null oop"); |
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68 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
342
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69 // If p points to a younger generation, mark the card. |
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70 if ((HeapWord*)obj < gen_boundary()) { |
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71 rs()->write_ref_field_gc_par(p, obj); |
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72 } |
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73 } |
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74 |
0 | 75 // NOTE! Any changes made here should also be made |
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76 // in FastScanClosure::do_oop_work() |
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77 template <class T> inline void ScanClosure::do_oop_work(T* p) { |
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78 T heap_oop = oopDesc::load_heap_oop(p); |
0 | 79 // Should we copy the obj? |
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80 if (!oopDesc::is_null(heap_oop)) { |
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81 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
0 | 82 if ((HeapWord*)obj < _boundary) { |
83 assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); | |
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84 oop new_obj = obj->is_forwarded() ? obj->forwardee() |
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85 : _g->copy_to_survivor_space(obj); |
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86 oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
0 | 87 } |
88 if (_gc_barrier) { | |
89 // Now call parent closure | |
90 do_barrier(p); | |
91 } | |
92 } | |
93 } | |
94 | |
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95 inline void ScanClosure::do_oop_nv(oop* p) { ScanClosure::do_oop_work(p); } |
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96 inline void ScanClosure::do_oop_nv(narrowOop* p) { ScanClosure::do_oop_work(p); } |
0 | 97 |
98 // NOTE! Any changes made here should also be made | |
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99 // in ScanClosure::do_oop_work() |
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100 template <class T> inline void FastScanClosure::do_oop_work(T* p) { |
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101 T heap_oop = oopDesc::load_heap_oop(p); |
0 | 102 // Should we copy the obj? |
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103 if (!oopDesc::is_null(heap_oop)) { |
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104 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
0 | 105 if ((HeapWord*)obj < _boundary) { |
106 assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); | |
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107 oop new_obj = obj->is_forwarded() ? obj->forwardee() |
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108 : _g->copy_to_survivor_space(obj); |
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109 oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
0 | 110 if (_gc_barrier) { |
111 // Now call parent closure | |
112 do_barrier(p); | |
113 } | |
114 } | |
115 } | |
116 } | |
117 | |
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118 inline void FastScanClosure::do_oop_nv(oop* p) { FastScanClosure::do_oop_work(p); } |
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119 inline void FastScanClosure::do_oop_nv(narrowOop* p) { FastScanClosure::do_oop_work(p); } |
0 | 120 |
121 // Note similarity to ScanClosure; the difference is that | |
122 // the barrier set is taken care of outside this closure. | |
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123 template <class T> inline void ScanWeakRefClosure::do_oop_work(T* p) { |
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124 assert(!oopDesc::is_null(*p), "null weak reference?"); |
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125 oop obj = oopDesc::load_decode_heap_oop_not_null(p); |
0 | 126 // weak references are sometimes scanned twice; must check |
127 // that to-space doesn't already contain this object | |
128 if ((HeapWord*)obj < _boundary && !_g->to()->is_in_reserved(obj)) { | |
113
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129 oop new_obj = obj->is_forwarded() ? obj->forwardee() |
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130 : _g->copy_to_survivor_space(obj); |
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131 oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
0 | 132 } |
133 } | |
134 | |
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135 inline void ScanWeakRefClosure::do_oop_nv(oop* p) { ScanWeakRefClosure::do_oop_work(p); } |
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136 inline void ScanWeakRefClosure::do_oop_nv(narrowOop* p) { ScanWeakRefClosure::do_oop_work(p); } |
1972 | 137 |
138 #endif // SHARE_VM_MEMORY_GENOOPCLOSURES_INLINE_HPP |