Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1OopClosures.hpp @ 941:8b46c4d82093
4957990: Perm heap bloat in JVM
Summary: Treat ProfileData in MDO's as a source of weak, not strong, roots. Fixes the bug for stop-world collection -- the case of concurrent collection will be fixed separately.
Reviewed-by: jcoomes, jmasa, kvn, never
| author | ysr |
|---|---|
| date | Wed, 02 Sep 2009 00:04:29 -0700 |
| parents | df6caf649ff7 |
| children | 0414c1049f15 |
| rev | line source |
|---|---|
| 342 | 1 /* |
| 579 | 2 * Copyright 2001-2009 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 class HeapRegion; | |
| 26 class G1CollectedHeap; | |
| 27 class G1RemSet; | |
| 28 class HRInto_G1RemSet; | |
| 29 class G1RemSet; | |
| 30 class ConcurrentMark; | |
| 31 class DirtyCardToOopClosure; | |
| 32 class CMBitMap; | |
| 33 class CMMarkStack; | |
| 34 class G1ParScanThreadState; | |
| 35 | |
| 36 // A class that scans oops in a given heap region (much as OopsInGenClosure | |
| 37 // scans oops in a generation.) | |
| 38 class OopsInHeapRegionClosure: public OopsInGenClosure { | |
| 39 protected: | |
| 40 HeapRegion* _from; | |
| 41 public: | |
| 42 virtual void set_region(HeapRegion* from) { _from = from; } | |
| 43 }; | |
| 44 | |
| 45 class G1ParClosureSuper : public OopsInHeapRegionClosure { | |
| 46 protected: | |
| 47 G1CollectedHeap* _g1; | |
| 48 G1RemSet* _g1_rem; | |
| 49 ConcurrentMark* _cm; | |
| 50 G1ParScanThreadState* _par_scan_state; | |
| 51 public: | |
| 52 G1ParClosureSuper(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state); | |
| 53 bool apply_to_weak_ref_discovered_field() { return true; } | |
| 54 }; | |
| 55 | |
| 56 class G1ParScanClosure : public G1ParClosureSuper { | |
| 57 public: | |
| 58 G1ParScanClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) : | |
| 59 G1ParClosureSuper(g1, par_scan_state) { } | |
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60 template <class T> void do_oop_nv(T* p); |
| 342 | 61 virtual void do_oop(oop* p) { do_oop_nv(p); } |
| 62 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } | |
| 63 }; | |
| 64 | |
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65 #define G1_PARTIAL_ARRAY_MASK 0x2 |
| 342 | 66 |
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67 template <class T> inline bool has_partial_array_mask(T* ref) { |
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68 return ((uintptr_t)ref & G1_PARTIAL_ARRAY_MASK) == G1_PARTIAL_ARRAY_MASK; |
| 526 | 69 } |
| 70 | |
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71 template <class T> inline T* set_partial_array_mask(T obj) { |
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72 assert(((uintptr_t)obj & G1_PARTIAL_ARRAY_MASK) == 0, "Information loss!"); |
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73 return (T*) ((uintptr_t)obj | G1_PARTIAL_ARRAY_MASK); |
| 526 | 74 } |
| 75 | |
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76 template <class T> inline oop clear_partial_array_mask(T* ref) { |
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77 return oop((intptr_t)ref & ~G1_PARTIAL_ARRAY_MASK); |
| 526 | 78 } |
| 79 | |
| 342 | 80 class G1ParScanPartialArrayClosure : public G1ParClosureSuper { |
| 81 G1ParScanClosure _scanner; | |
| 82 public: | |
| 83 G1ParScanPartialArrayClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) : | |
| 84 G1ParClosureSuper(g1, par_scan_state), _scanner(g1, par_scan_state) { } | |
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85 template <class T> void do_oop_nv(T* p); |
| 342 | 86 virtual void do_oop(oop* p) { do_oop_nv(p); } |
| 87 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } | |
| 88 }; | |
| 89 | |
| 90 | |
| 91 class G1ParCopyHelper : public G1ParClosureSuper { | |
| 92 G1ParScanClosure *_scanner; | |
| 93 protected: | |
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94 template <class T> void mark_forwardee(T* p); |
| 342 | 95 oop copy_to_survivor_space(oop obj); |
| 96 public: | |
| 97 G1ParCopyHelper(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state, | |
| 98 G1ParScanClosure *scanner) : | |
| 99 G1ParClosureSuper(g1, par_scan_state), _scanner(scanner) { } | |
| 100 }; | |
| 101 | |
| 526 | 102 template<bool do_gen_barrier, G1Barrier barrier, |
| 103 bool do_mark_forwardee, bool skip_cset_test> | |
| 342 | 104 class G1ParCopyClosure : public G1ParCopyHelper { |
| 105 G1ParScanClosure _scanner; | |
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106 template <class T> void do_oop_work(T* p); |
| 342 | 107 public: |
| 108 G1ParCopyClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) : | |
| 109 _scanner(g1, par_scan_state), G1ParCopyHelper(g1, par_scan_state, &_scanner) { } | |
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110 template <class T> void do_oop_nv(T* p) { |
| 342 | 111 do_oop_work(p); |
| 112 if (do_mark_forwardee) | |
| 113 mark_forwardee(p); | |
| 114 } | |
| 115 virtual void do_oop(oop* p) { do_oop_nv(p); } | |
| 116 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } | |
| 117 }; | |
| 118 | |
| 526 | 119 typedef G1ParCopyClosure<false, G1BarrierNone, false, false> G1ParScanExtRootClosure; |
| 120 typedef G1ParCopyClosure<true, G1BarrierNone, false, false> G1ParScanPermClosure; | |
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121 typedef G1ParCopyClosure<false, G1BarrierRS, false, false> G1ParScanHeapRSClosure; |
| 526 | 122 typedef G1ParCopyClosure<false, G1BarrierNone, true, false> G1ParScanAndMarkExtRootClosure; |
| 123 typedef G1ParCopyClosure<true, G1BarrierNone, true, false> G1ParScanAndMarkPermClosure; | |
| 124 typedef G1ParCopyClosure<false, G1BarrierRS, true, false> G1ParScanAndMarkHeapRSClosure; | |
| 125 // This is the only case when we set skip_cset_test. Basically, this | |
| 126 // closure is (should?) only be called directly while we're draining | |
| 127 // the overflow and task queues. In that case we know that the | |
| 128 // reference in question points into the collection set, otherwise we | |
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129 // would not have pushed it on the queue. The following is defined in |
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130 // g1_specialized_oop_closures.hpp. |
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131 // typedef G1ParCopyClosure<false, G1BarrierEvac, false, true> G1ParScanHeapEvacClosure; |
| 526 | 132 // We need a separate closure to handle references during evacuation |
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133 // failure processing, as we cannot asume that the reference already |
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134 // points into the collection set (like G1ParScanHeapEvacClosure does). |
| 526 | 135 typedef G1ParCopyClosure<false, G1BarrierEvac, false, false> G1ParScanHeapEvacFailureClosure; |
| 342 | 136 |
| 137 class FilterIntoCSClosure: public OopClosure { | |
| 138 G1CollectedHeap* _g1; | |
| 139 OopClosure* _oc; | |
| 140 DirtyCardToOopClosure* _dcto_cl; | |
| 141 public: | |
| 142 FilterIntoCSClosure( DirtyCardToOopClosure* dcto_cl, | |
| 143 G1CollectedHeap* g1, OopClosure* oc) : | |
| 144 _dcto_cl(dcto_cl), _g1(g1), _oc(oc) | |
| 145 {} | |
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146 template <class T> void do_oop_nv(T* p); |
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147 virtual void do_oop(oop* p) { do_oop_nv(p); } |
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148 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
| 342 | 149 bool apply_to_weak_ref_discovered_field() { return true; } |
| 150 bool do_header() { return false; } | |
| 151 }; | |
| 152 | |
| 153 class FilterInHeapRegionAndIntoCSClosure : public OopsInHeapRegionClosure { | |
| 154 G1CollectedHeap* _g1; | |
| 155 OopsInHeapRegionClosure* _oc; | |
| 156 public: | |
| 157 FilterInHeapRegionAndIntoCSClosure(G1CollectedHeap* g1, | |
| 158 OopsInHeapRegionClosure* oc) : | |
| 159 _g1(g1), _oc(oc) | |
| 160 {} | |
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161 template <class T> void do_oop_nv(T* p); |
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162 virtual void do_oop(oop* p) { do_oop_nv(p); } |
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163 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
| 342 | 164 bool apply_to_weak_ref_discovered_field() { return true; } |
| 165 bool do_header() { return false; } | |
| 166 void set_region(HeapRegion* from) { | |
| 167 _oc->set_region(from); | |
| 168 } | |
| 169 }; | |
| 170 | |
| 171 class FilterAndMarkInHeapRegionAndIntoCSClosure : public OopsInHeapRegionClosure { | |
| 172 G1CollectedHeap* _g1; | |
| 173 ConcurrentMark* _cm; | |
| 174 OopsInHeapRegionClosure* _oc; | |
| 175 public: | |
| 176 FilterAndMarkInHeapRegionAndIntoCSClosure(G1CollectedHeap* g1, | |
| 177 OopsInHeapRegionClosure* oc, | |
| 178 ConcurrentMark* cm) | |
| 179 : _g1(g1), _oc(oc), _cm(cm) { } | |
| 180 | |
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181 template <class T> void do_oop_nv(T* p); |
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182 virtual void do_oop(oop* p) { do_oop_nv(p); } |
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183 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
| 342 | 184 bool apply_to_weak_ref_discovered_field() { return true; } |
| 185 bool do_header() { return false; } | |
| 186 void set_region(HeapRegion* from) { | |
| 187 _oc->set_region(from); | |
| 188 } | |
| 189 }; | |
| 190 | |
| 191 class FilterOutOfRegionClosure: public OopClosure { | |
| 192 HeapWord* _r_bottom; | |
| 193 HeapWord* _r_end; | |
| 194 OopClosure* _oc; | |
| 195 int _out_of_region; | |
| 196 public: | |
| 197 FilterOutOfRegionClosure(HeapRegion* r, OopClosure* oc); | |
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198 template <class T> void do_oop_nv(T* p); |
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199 virtual void do_oop(oop* p) { do_oop_nv(p); } |
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200 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
| 342 | 201 bool apply_to_weak_ref_discovered_field() { return true; } |
| 202 bool do_header() { return false; } | |
| 203 int out_of_region() { return _out_of_region; } | |
| 204 }; |