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annotate src/share/vm/gc_implementation/g1/g1OopClosures.hpp @ 3886:eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
Summary: Refactor code marking code in the evacuation pause copy closures so that an evacuated object is only marked by the thread that successfully copies it.
Reviewed-by: stefank, brutisso, tonyp
| author | johnc |
|---|---|
| date | Mon, 29 Aug 2011 10:13:06 -0700 |
| parents | 842b840e67db |
| children | 663cb89032b1 |
| rev | line source |
|---|---|
| 342 | 1 /* |
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2 * Copyright (c) 2001, 2011, 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; | |
| 3771 | 36 class CMTask; |
| 342 | 37 |
| 38 // A class that scans oops in a given heap region (much as OopsInGenClosure | |
| 39 // scans oops in a generation.) | |
| 40 class OopsInHeapRegionClosure: public OopsInGenClosure { | |
| 41 protected: | |
| 42 HeapRegion* _from; | |
| 43 public: | |
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44 void set_region(HeapRegion* from) { _from = from; } |
| 342 | 45 }; |
| 46 | |
| 47 class G1ParClosureSuper : public OopsInHeapRegionClosure { | |
| 48 protected: | |
| 49 G1CollectedHeap* _g1; | |
| 50 G1RemSet* _g1_rem; | |
| 51 ConcurrentMark* _cm; | |
| 52 G1ParScanThreadState* _par_scan_state; | |
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53 bool _during_initial_mark; |
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54 bool _mark_in_progress; |
| 342 | 55 public: |
| 56 G1ParClosureSuper(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state); | |
| 57 bool apply_to_weak_ref_discovered_field() { return true; } | |
| 58 }; | |
| 59 | |
| 1261 | 60 class G1ParPushHeapRSClosure : public G1ParClosureSuper { |
| 61 public: | |
| 62 G1ParPushHeapRSClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) : | |
| 63 G1ParClosureSuper(g1, par_scan_state) { } | |
| 64 template <class T> void do_oop_nv(T* p); | |
| 65 virtual void do_oop(oop* p) { do_oop_nv(p); } | |
| 66 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } | |
| 67 }; | |
| 68 | |
| 342 | 69 class G1ParScanClosure : public G1ParClosureSuper { |
| 70 public: | |
| 71 G1ParScanClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) : | |
| 72 G1ParClosureSuper(g1, par_scan_state) { } | |
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73 template <class T> void do_oop_nv(T* p); |
| 342 | 74 virtual void do_oop(oop* p) { do_oop_nv(p); } |
| 75 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } | |
| 76 }; | |
| 77 | |
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78 #define G1_PARTIAL_ARRAY_MASK 0x2 |
| 342 | 79 |
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80 template <class T> inline bool has_partial_array_mask(T* ref) { |
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81 return ((uintptr_t)ref & G1_PARTIAL_ARRAY_MASK) == G1_PARTIAL_ARRAY_MASK; |
| 526 | 82 } |
| 83 | |
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84 template <class T> inline T* set_partial_array_mask(T obj) { |
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85 assert(((uintptr_t)obj & G1_PARTIAL_ARRAY_MASK) == 0, "Information loss!"); |
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86 return (T*) ((uintptr_t)obj | G1_PARTIAL_ARRAY_MASK); |
| 526 | 87 } |
| 88 | |
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89 template <class T> inline oop clear_partial_array_mask(T* ref) { |
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90 return oop((intptr_t)ref & ~G1_PARTIAL_ARRAY_MASK); |
| 526 | 91 } |
| 92 | |
| 342 | 93 class G1ParScanPartialArrayClosure : public G1ParClosureSuper { |
| 94 G1ParScanClosure _scanner; | |
| 95 public: | |
| 96 G1ParScanPartialArrayClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) : | |
| 97 G1ParClosureSuper(g1, par_scan_state), _scanner(g1, par_scan_state) { } | |
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98 template <class T> void do_oop_nv(T* p); |
| 342 | 99 virtual void do_oop(oop* p) { do_oop_nv(p); } |
| 100 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } | |
| 101 }; | |
| 102 | |
| 103 | |
| 104 class G1ParCopyHelper : public G1ParClosureSuper { | |
| 105 G1ParScanClosure *_scanner; | |
| 106 protected: | |
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107 template <class T> void mark_object(T* p); |
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108 oop copy_to_survivor_space(oop obj, bool should_mark_copy); |
| 342 | 109 public: |
| 110 G1ParCopyHelper(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state, | |
| 111 G1ParScanClosure *scanner) : | |
| 112 G1ParClosureSuper(g1, par_scan_state), _scanner(scanner) { } | |
| 113 }; | |
| 114 | |
| 526 | 115 template<bool do_gen_barrier, G1Barrier barrier, |
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116 bool do_mark_object> |
| 342 | 117 class G1ParCopyClosure : public G1ParCopyHelper { |
| 118 G1ParScanClosure _scanner; | |
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119 template <class T> void do_oop_work(T* p); |
| 342 | 120 public: |
| 121 G1ParCopyClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) : | |
| 122 _scanner(g1, par_scan_state), G1ParCopyHelper(g1, par_scan_state, &_scanner) { } | |
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123 template <class T> void do_oop_nv(T* p) { |
| 342 | 124 do_oop_work(p); |
| 125 } | |
| 126 virtual void do_oop(oop* p) { do_oop_nv(p); } | |
| 127 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } | |
| 128 }; | |
| 129 | |
| 1261 | 130 typedef G1ParCopyClosure<false, G1BarrierNone, false> G1ParScanExtRootClosure; |
| 131 typedef G1ParCopyClosure<true, G1BarrierNone, false> G1ParScanPermClosure; | |
| 132 typedef G1ParCopyClosure<false, G1BarrierRS, false> G1ParScanHeapRSClosure; | |
| 133 typedef G1ParCopyClosure<false, G1BarrierNone, true> G1ParScanAndMarkExtRootClosure; | |
| 134 typedef G1ParCopyClosure<true, G1BarrierNone, true> G1ParScanAndMarkPermClosure; | |
| 135 typedef G1ParCopyClosure<false, G1BarrierRS, true> G1ParScanAndMarkHeapRSClosure; | |
| 136 | |
| 526 | 137 // This is the only case when we set skip_cset_test. Basically, this |
| 138 // closure is (should?) only be called directly while we're draining | |
| 139 // the overflow and task queues. In that case we know that the | |
| 140 // reference in question points into the collection set, otherwise we | |
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141 // would not have pushed it on the queue. The following is defined in |
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142 // g1_specialized_oop_closures.hpp. |
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143 // typedef G1ParCopyClosure<false, G1BarrierEvac, false, true> G1ParScanHeapEvacClosure; |
| 526 | 144 // We need a separate closure to handle references during evacuation |
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145 // failure processing, as we cannot asume that the reference already |
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146 // points into the collection set (like G1ParScanHeapEvacClosure does). |
| 1261 | 147 typedef G1ParCopyClosure<false, G1BarrierEvac, false> G1ParScanHeapEvacFailureClosure; |
| 342 | 148 |
| 149 class FilterIntoCSClosure: public OopClosure { | |
| 150 G1CollectedHeap* _g1; | |
| 151 OopClosure* _oc; | |
| 152 DirtyCardToOopClosure* _dcto_cl; | |
| 153 public: | |
| 154 FilterIntoCSClosure( DirtyCardToOopClosure* dcto_cl, | |
| 155 G1CollectedHeap* g1, OopClosure* oc) : | |
| 156 _dcto_cl(dcto_cl), _g1(g1), _oc(oc) | |
| 157 {} | |
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158 template <class T> void do_oop_nv(T* p); |
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159 virtual void do_oop(oop* p) { do_oop_nv(p); } |
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160 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
| 342 | 161 bool apply_to_weak_ref_discovered_field() { return true; } |
| 162 bool do_header() { return false; } | |
| 163 }; | |
| 164 | |
| 165 class FilterOutOfRegionClosure: public OopClosure { | |
| 166 HeapWord* _r_bottom; | |
| 167 HeapWord* _r_end; | |
| 168 OopClosure* _oc; | |
| 169 int _out_of_region; | |
| 170 public: | |
| 171 FilterOutOfRegionClosure(HeapRegion* r, OopClosure* oc); | |
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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 int out_of_region() { return _out_of_region; } | |
| 178 }; | |
| 1972 | 179 |
| 3771 | 180 // Closure for iterating over object fields during concurrent marking |
| 181 class G1CMOopClosure : public OopClosure { | |
| 182 G1CollectedHeap* _g1h; | |
| 183 ConcurrentMark* _cm; | |
| 184 CMTask* _task; | |
| 185 public: | |
| 186 G1CMOopClosure(G1CollectedHeap* g1h, ConcurrentMark* cm, CMTask* task); | |
| 187 template <class T> void do_oop_nv(T* p); | |
| 188 virtual void do_oop( oop* p) { do_oop_nv(p); } | |
| 189 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } | |
| 190 }; | |
| 191 | |
| 1972 | 192 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP |