Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1OopClosures.hpp @ 1995:8df09fb45352
7005259: CMS: BubbleUpRef asserts referent(obj)->is_oop() failed: Enqueued a bad referent
Summary: Relaxed the assert by allowing NULL referents when discovery may be concurrent.
Reviewed-by: johnc, jcoomes
author | ysr |
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date | Thu, 09 Dec 2010 09:22:57 -0800 |
parents | f95d63e2154a |
children | ae5b2f1dcf12 |
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342 | 1 /* |
1972 | 2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
342 | 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. |
342 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP | |
27 | |
342 | 28 class HeapRegion; |
29 class G1CollectedHeap; | |
30 class G1RemSet; | |
31 class ConcurrentMark; | |
32 class DirtyCardToOopClosure; | |
33 class CMBitMap; | |
34 class CMMarkStack; | |
35 class G1ParScanThreadState; | |
36 | |
37 // A class that scans oops in a given heap region (much as OopsInGenClosure | |
38 // scans oops in a generation.) | |
39 class OopsInHeapRegionClosure: public OopsInGenClosure { | |
40 protected: | |
41 HeapRegion* _from; | |
42 public: | |
43 virtual void set_region(HeapRegion* from) { _from = from; } | |
44 }; | |
45 | |
46 class G1ParClosureSuper : public OopsInHeapRegionClosure { | |
47 protected: | |
48 G1CollectedHeap* _g1; | |
49 G1RemSet* _g1_rem; | |
50 ConcurrentMark* _cm; | |
51 G1ParScanThreadState* _par_scan_state; | |
52 public: | |
53 G1ParClosureSuper(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state); | |
54 bool apply_to_weak_ref_discovered_field() { return true; } | |
55 }; | |
56 | |
1261 | 57 class G1ParPushHeapRSClosure : public G1ParClosureSuper { |
58 public: | |
59 G1ParPushHeapRSClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) : | |
60 G1ParClosureSuper(g1, par_scan_state) { } | |
61 template <class T> void do_oop_nv(T* p); | |
62 virtual void do_oop(oop* p) { do_oop_nv(p); } | |
63 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } | |
64 }; | |
65 | |
342 | 66 class G1ParScanClosure : public G1ParClosureSuper { |
67 public: | |
68 G1ParScanClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) : | |
69 G1ParClosureSuper(g1, par_scan_state) { } | |
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70 template <class T> void do_oop_nv(T* p); |
342 | 71 virtual void do_oop(oop* p) { do_oop_nv(p); } |
72 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } | |
73 }; | |
74 | |
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75 #define G1_PARTIAL_ARRAY_MASK 0x2 |
342 | 76 |
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77 template <class T> inline bool has_partial_array_mask(T* ref) { |
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78 return ((uintptr_t)ref & G1_PARTIAL_ARRAY_MASK) == G1_PARTIAL_ARRAY_MASK; |
526 | 79 } |
80 | |
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81 template <class T> inline T* set_partial_array_mask(T obj) { |
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82 assert(((uintptr_t)obj & G1_PARTIAL_ARRAY_MASK) == 0, "Information loss!"); |
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83 return (T*) ((uintptr_t)obj | G1_PARTIAL_ARRAY_MASK); |
526 | 84 } |
85 | |
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86 template <class T> inline oop clear_partial_array_mask(T* ref) { |
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87 return oop((intptr_t)ref & ~G1_PARTIAL_ARRAY_MASK); |
526 | 88 } |
89 | |
342 | 90 class G1ParScanPartialArrayClosure : public G1ParClosureSuper { |
91 G1ParScanClosure _scanner; | |
92 public: | |
93 G1ParScanPartialArrayClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) : | |
94 G1ParClosureSuper(g1, par_scan_state), _scanner(g1, par_scan_state) { } | |
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95 template <class T> void do_oop_nv(T* p); |
342 | 96 virtual void do_oop(oop* p) { do_oop_nv(p); } |
97 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } | |
98 }; | |
99 | |
100 | |
101 class G1ParCopyHelper : public G1ParClosureSuper { | |
102 G1ParScanClosure *_scanner; | |
103 protected: | |
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104 template <class T> void mark_forwardee(T* p); |
342 | 105 oop copy_to_survivor_space(oop obj); |
106 public: | |
107 G1ParCopyHelper(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state, | |
108 G1ParScanClosure *scanner) : | |
109 G1ParClosureSuper(g1, par_scan_state), _scanner(scanner) { } | |
110 }; | |
111 | |
526 | 112 template<bool do_gen_barrier, G1Barrier barrier, |
1261 | 113 bool do_mark_forwardee> |
342 | 114 class G1ParCopyClosure : public G1ParCopyHelper { |
115 G1ParScanClosure _scanner; | |
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116 template <class T> void do_oop_work(T* p); |
342 | 117 public: |
118 G1ParCopyClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) : | |
119 _scanner(g1, par_scan_state), G1ParCopyHelper(g1, par_scan_state, &_scanner) { } | |
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120 template <class T> void do_oop_nv(T* p) { |
342 | 121 do_oop_work(p); |
122 if (do_mark_forwardee) | |
123 mark_forwardee(p); | |
124 } | |
125 virtual void do_oop(oop* p) { do_oop_nv(p); } | |
126 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } | |
127 }; | |
128 | |
1261 | 129 typedef G1ParCopyClosure<false, G1BarrierNone, false> G1ParScanExtRootClosure; |
130 typedef G1ParCopyClosure<true, G1BarrierNone, false> G1ParScanPermClosure; | |
131 typedef G1ParCopyClosure<false, G1BarrierRS, false> G1ParScanHeapRSClosure; | |
132 typedef G1ParCopyClosure<false, G1BarrierNone, true> G1ParScanAndMarkExtRootClosure; | |
133 typedef G1ParCopyClosure<true, G1BarrierNone, true> G1ParScanAndMarkPermClosure; | |
134 typedef G1ParCopyClosure<false, G1BarrierRS, true> G1ParScanAndMarkHeapRSClosure; | |
135 | |
526 | 136 // This is the only case when we set skip_cset_test. Basically, this |
137 // closure is (should?) only be called directly while we're draining | |
138 // the overflow and task queues. In that case we know that the | |
139 // reference in question points into the collection set, otherwise we | |
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140 // would not have pushed it on the queue. The following is defined in |
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141 // g1_specialized_oop_closures.hpp. |
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142 // typedef G1ParCopyClosure<false, G1BarrierEvac, false, true> G1ParScanHeapEvacClosure; |
526 | 143 // We need a separate closure to handle references during evacuation |
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144 // failure processing, as we cannot asume that the reference already |
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145 // points into the collection set (like G1ParScanHeapEvacClosure does). |
1261 | 146 typedef G1ParCopyClosure<false, G1BarrierEvac, false> G1ParScanHeapEvacFailureClosure; |
342 | 147 |
148 class FilterIntoCSClosure: public OopClosure { | |
149 G1CollectedHeap* _g1; | |
150 OopClosure* _oc; | |
151 DirtyCardToOopClosure* _dcto_cl; | |
152 public: | |
153 FilterIntoCSClosure( DirtyCardToOopClosure* dcto_cl, | |
154 G1CollectedHeap* g1, OopClosure* oc) : | |
155 _dcto_cl(dcto_cl), _g1(g1), _oc(oc) | |
156 {} | |
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157 template <class T> void do_oop_nv(T* p); |
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158 virtual void do_oop(oop* p) { do_oop_nv(p); } |
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159 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
342 | 160 bool apply_to_weak_ref_discovered_field() { return true; } |
161 bool do_header() { return false; } | |
162 }; | |
163 | |
164 class FilterInHeapRegionAndIntoCSClosure : public OopsInHeapRegionClosure { | |
165 G1CollectedHeap* _g1; | |
166 OopsInHeapRegionClosure* _oc; | |
167 public: | |
168 FilterInHeapRegionAndIntoCSClosure(G1CollectedHeap* g1, | |
169 OopsInHeapRegionClosure* oc) : | |
170 _g1(g1), _oc(oc) | |
171 {} | |
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172 template <class T> void do_oop_nv(T* p); |
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173 virtual void do_oop(oop* p) { do_oop_nv(p); } |
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174 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
342 | 175 bool apply_to_weak_ref_discovered_field() { return true; } |
176 bool do_header() { return false; } | |
177 void set_region(HeapRegion* from) { | |
178 _oc->set_region(from); | |
179 } | |
180 }; | |
181 | |
182 class FilterAndMarkInHeapRegionAndIntoCSClosure : public OopsInHeapRegionClosure { | |
183 G1CollectedHeap* _g1; | |
184 ConcurrentMark* _cm; | |
185 OopsInHeapRegionClosure* _oc; | |
186 public: | |
187 FilterAndMarkInHeapRegionAndIntoCSClosure(G1CollectedHeap* g1, | |
188 OopsInHeapRegionClosure* oc, | |
189 ConcurrentMark* cm) | |
190 : _g1(g1), _oc(oc), _cm(cm) { } | |
191 | |
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192 template <class T> void do_oop_nv(T* p); |
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193 virtual void do_oop(oop* p) { do_oop_nv(p); } |
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194 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
342 | 195 bool apply_to_weak_ref_discovered_field() { return true; } |
196 bool do_header() { return false; } | |
197 void set_region(HeapRegion* from) { | |
198 _oc->set_region(from); | |
199 } | |
200 }; | |
201 | |
202 class FilterOutOfRegionClosure: public OopClosure { | |
203 HeapWord* _r_bottom; | |
204 HeapWord* _r_end; | |
205 OopClosure* _oc; | |
206 int _out_of_region; | |
207 public: | |
208 FilterOutOfRegionClosure(HeapRegion* r, OopClosure* oc); | |
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209 template <class T> void do_oop_nv(T* p); |
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210 virtual void do_oop(oop* p) { do_oop_nv(p); } |
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211 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
342 | 212 bool apply_to_weak_ref_discovered_field() { return true; } |
213 bool do_header() { return false; } | |
214 int out_of_region() { return _out_of_region; } | |
215 }; | |
1972 | 216 |
217 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP |