Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/g1/g1OopClosures.hpp @ 21811:22ac20a25842
8055479: TLAB stability
Reviewed-by: brutisso, stefank, ahgross
author | mgerdin |
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date | Thu, 09 Oct 2014 15:42:23 +0200 |
parents | 8847586c9037 |
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342 | 1 /* |
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2 * Copyright (c) 2001, 2014, 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; |
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37 class ReferenceProcessor; |
342 | 38 |
39 // A class that scans oops in a given heap region (much as OopsInGenClosure | |
40 // scans oops in a generation.) | |
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41 class OopsInHeapRegionClosure: public ExtendedOopClosure { |
342 | 42 protected: |
43 HeapRegion* _from; | |
44 public: | |
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45 void set_region(HeapRegion* from) { _from = from; } |
342 | 46 }; |
47 | |
48 class G1ParClosureSuper : public OopsInHeapRegionClosure { | |
49 protected: | |
50 G1CollectedHeap* _g1; | |
51 G1ParScanThreadState* _par_scan_state; | |
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52 uint _worker_id; |
342 | 53 public: |
54 G1ParClosureSuper(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state); | |
55 bool apply_to_weak_ref_discovered_field() { return true; } | |
56 }; | |
57 | |
1261 | 58 class G1ParPushHeapRSClosure : public G1ParClosureSuper { |
59 public: | |
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60 G1ParPushHeapRSClosure(G1CollectedHeap* g1, |
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61 G1ParScanThreadState* par_scan_state): |
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62 G1ParClosureSuper(g1, par_scan_state) { } |
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63 |
1261 | 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: | |
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71 G1ParScanClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state, ReferenceProcessor* rp) : |
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72 G1ParClosureSuper(g1, par_scan_state) |
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73 { |
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74 assert(_ref_processor == NULL, "sanity"); |
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75 _ref_processor = rp; |
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76 } |
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77 |
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78 template <class T> void do_oop_nv(T* p); |
342 | 79 virtual void do_oop(oop* p) { do_oop_nv(p); } |
80 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } | |
81 }; | |
82 | |
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83 // Add back base class for metadata |
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84 class G1ParCopyHelper : public G1ParClosureSuper { |
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85 protected: |
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86 Klass* _scanned_klass; |
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87 ConcurrentMark* _cm; |
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88 |
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89 // Mark the object if it's not already marked. This is used to mark |
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90 // objects pointed to by roots that are guaranteed not to move |
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91 // during the GC (i.e., non-CSet objects). It is MT-safe. |
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92 void mark_object(oop obj); |
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93 |
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94 // Mark the object if it's not already marked. This is used to mark |
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95 // objects pointed to by roots that have been forwarded during a |
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96 // GC. It is MT-safe. |
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97 void mark_forwarded_object(oop from_obj, oop to_obj); |
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98 public: |
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99 G1ParCopyHelper(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state); |
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100 |
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101 void set_scanned_klass(Klass* k) { _scanned_klass = k; } |
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102 template <class T> void do_klass_barrier(T* p, oop new_obj); |
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103 }; |
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104 |
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105 template <G1Barrier barrier, bool do_mark_object> |
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106 class G1ParCopyClosure : public G1ParCopyHelper { |
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107 private: |
5987 | 108 template <class T> void do_oop_work(T* p); |
342 | 109 |
110 public: | |
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111 G1ParCopyClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state, |
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112 ReferenceProcessor* rp) : |
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113 G1ParCopyHelper(g1, par_scan_state) { |
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114 assert(_ref_processor == NULL, "sanity"); |
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115 } |
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116 |
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117 template <class T> void do_oop_nv(T* p) { do_oop_work(p); } |
342 | 118 virtual void do_oop(oop* p) { do_oop_nv(p); } |
119 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } | |
120 }; | |
121 | |
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122 typedef G1ParCopyClosure<G1BarrierNone, false> G1ParScanExtRootClosure; |
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123 typedef G1ParCopyClosure<G1BarrierKlass, false> G1ParScanMetadataClosure; |
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124 |
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125 |
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126 typedef G1ParCopyClosure<G1BarrierNone, true> G1ParScanAndMarkExtRootClosure; |
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127 typedef G1ParCopyClosure<G1BarrierKlass, true> G1ParScanAndMarkMetadataClosure; |
1261 | 128 |
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129 // We use a separate closure to handle references during evacuation |
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130 // failure processing. |
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131 |
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132 typedef G1ParCopyClosure<G1BarrierEvac, false> G1ParScanHeapEvacFailureClosure; |
342 | 133 |
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134 class FilterIntoCSClosure: public ExtendedOopClosure { |
342 | 135 G1CollectedHeap* _g1; |
136 OopClosure* _oc; | |
137 DirtyCardToOopClosure* _dcto_cl; | |
138 public: | |
139 FilterIntoCSClosure( DirtyCardToOopClosure* dcto_cl, | |
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140 G1CollectedHeap* g1, |
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141 OopClosure* oc) : |
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142 _dcto_cl(dcto_cl), _g1(g1), _oc(oc) { } |
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143 |
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144 template <class T> void do_oop_nv(T* p); |
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145 virtual void do_oop(oop* p) { do_oop_nv(p); } |
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146 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
342 | 147 bool apply_to_weak_ref_discovered_field() { return true; } |
148 }; | |
149 | |
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150 class FilterOutOfRegionClosure: public ExtendedOopClosure { |
342 | 151 HeapWord* _r_bottom; |
152 HeapWord* _r_end; | |
153 OopClosure* _oc; | |
154 public: | |
155 FilterOutOfRegionClosure(HeapRegion* r, OopClosure* oc); | |
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156 template <class T> void do_oop_nv(T* p); |
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157 virtual void do_oop(oop* p) { do_oop_nv(p); } |
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158 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
342 | 159 bool apply_to_weak_ref_discovered_field() { return true; } |
160 }; | |
1972 | 161 |
3771 | 162 // Closure for iterating over object fields during concurrent marking |
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163 class G1CMOopClosure : public ExtendedOopClosure { |
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164 private: |
3771 | 165 G1CollectedHeap* _g1h; |
166 ConcurrentMark* _cm; | |
167 CMTask* _task; | |
168 public: | |
169 G1CMOopClosure(G1CollectedHeap* g1h, ConcurrentMark* cm, CMTask* task); | |
170 template <class T> void do_oop_nv(T* p); | |
171 virtual void do_oop( oop* p) { do_oop_nv(p); } | |
172 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } | |
173 }; | |
174 | |
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175 // Closure to scan the root regions during concurrent marking |
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176 class G1RootRegionScanClosure : public ExtendedOopClosure { |
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177 private: |
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178 G1CollectedHeap* _g1h; |
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179 ConcurrentMark* _cm; |
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180 uint _worker_id; |
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181 public: |
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182 G1RootRegionScanClosure(G1CollectedHeap* g1h, ConcurrentMark* cm, |
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183 uint worker_id) : |
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184 _g1h(g1h), _cm(cm), _worker_id(worker_id) { } |
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185 template <class T> void do_oop_nv(T* p); |
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186 virtual void do_oop( oop* p) { do_oop_nv(p); } |
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187 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
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188 }; |
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189 |
4839 | 190 // Closure that applies the given two closures in sequence. |
191 // Used by the RSet refinement code (when updating RSets | |
192 // during an evacuation pause) to record cards containing | |
193 // pointers into the collection set. | |
194 | |
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195 class G1Mux2Closure : public ExtendedOopClosure { |
4839 | 196 OopClosure* _c1; |
197 OopClosure* _c2; | |
198 public: | |
199 G1Mux2Closure(OopClosure *c1, OopClosure *c2); | |
200 template <class T> void do_oop_nv(T* p); | |
201 virtual void do_oop(oop* p) { do_oop_nv(p); } | |
202 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } | |
203 }; | |
204 | |
205 // A closure that returns true if it is actually applied | |
206 // to a reference | |
207 | |
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208 class G1TriggerClosure : public ExtendedOopClosure { |
4839 | 209 bool _triggered; |
210 public: | |
211 G1TriggerClosure(); | |
212 bool triggered() const { return _triggered; } | |
213 template <class T> void do_oop_nv(T* p); | |
214 virtual void do_oop(oop* p) { do_oop_nv(p); } | |
215 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } | |
216 }; | |
217 | |
218 // A closure which uses a triggering closure to determine | |
219 // whether to apply an oop closure. | |
220 | |
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221 class G1InvokeIfNotTriggeredClosure: public ExtendedOopClosure { |
4839 | 222 G1TriggerClosure* _trigger_cl; |
223 OopClosure* _oop_cl; | |
224 public: | |
225 G1InvokeIfNotTriggeredClosure(G1TriggerClosure* t, OopClosure* oc); | |
226 template <class T> void do_oop_nv(T* p); | |
227 virtual void do_oop(oop* p) { do_oop_nv(p); } | |
228 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } | |
229 }; | |
230 | |
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231 class G1UpdateRSOrPushRefOopClosure: public ExtendedOopClosure { |
4839 | 232 G1CollectedHeap* _g1; |
233 G1RemSet* _g1_rem_set; | |
234 HeapRegion* _from; | |
235 OopsInHeapRegionClosure* _push_ref_cl; | |
236 bool _record_refs_into_cset; | |
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237 uint _worker_i; |
4839 | 238 |
239 public: | |
240 G1UpdateRSOrPushRefOopClosure(G1CollectedHeap* g1h, | |
241 G1RemSet* rs, | |
242 OopsInHeapRegionClosure* push_ref_cl, | |
243 bool record_refs_into_cset, | |
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244 uint worker_i = 0); |
4839 | 245 |
246 void set_from(HeapRegion* from) { | |
247 assert(from != NULL, "from region must be non-NULL"); | |
248 _from = from; | |
249 } | |
250 | |
251 bool self_forwarded(oop obj) { | |
252 bool result = (obj->is_forwarded() && (obj->forwardee()== obj)); | |
253 return result; | |
254 } | |
255 | |
256 bool apply_to_weak_ref_discovered_field() { return true; } | |
257 | |
258 template <class T> void do_oop_nv(T* p); | |
259 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } | |
260 virtual void do_oop(oop* p) { do_oop_nv(p); } | |
261 }; | |
262 | |
1972 | 263 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP |