Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/parallelScavenge/psTasks.cpp @ 845:df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
Summary: Modifications to G1 so as to allow the use of compressed oops.
Reviewed-by: apetrusenko, coleenp, jmasa, kvn, never, phh, tonyp
author | ysr |
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date | Tue, 14 Jul 2009 15:40:39 -0700 |
parents | d1605aabd0a1 |
children | 148e5441d916 |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 2002-2008 Sun Microsystems, Inc. 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 * | |
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 #include "incls/_precompiled.incl" | |
26 #include "incls/_psTasks.cpp.incl" | |
27 | |
28 // | |
29 // ScavengeRootsTask | |
30 // | |
31 | |
32 // Define before use | |
33 class PSScavengeRootsClosure: public OopClosure { | |
34 private: | |
35 PSPromotionManager* _promotion_manager; | |
36 | |
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37 protected: |
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38 template <class T> void do_oop_work(T *p) { |
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39 if (PSScavenge::should_scavenge(p)) { |
0 | 40 // We never card mark roots, maybe call a func without test? |
41 PSScavenge::copy_and_push_safe_barrier(_promotion_manager, p); | |
42 } | |
43 } | |
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44 public: |
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45 PSScavengeRootsClosure(PSPromotionManager* pm) : _promotion_manager(pm) { } |
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46 void do_oop(oop* p) { PSScavengeRootsClosure::do_oop_work(p); } |
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47 void do_oop(narrowOop* p) { PSScavengeRootsClosure::do_oop_work(p); } |
0 | 48 }; |
49 | |
50 void ScavengeRootsTask::do_it(GCTaskManager* manager, uint which) { | |
51 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
52 | |
53 PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which); | |
54 PSScavengeRootsClosure roots_closure(pm); | |
55 | |
56 switch (_root_type) { | |
57 case universe: | |
58 Universe::oops_do(&roots_closure); | |
59 ReferenceProcessor::oops_do(&roots_closure); | |
60 break; | |
61 | |
62 case jni_handles: | |
63 JNIHandles::oops_do(&roots_closure); | |
64 break; | |
65 | |
66 case threads: | |
67 { | |
68 ResourceMark rm; | |
69 Threads::oops_do(&roots_closure); | |
70 } | |
71 break; | |
72 | |
73 case object_synchronizer: | |
74 ObjectSynchronizer::oops_do(&roots_closure); | |
75 break; | |
76 | |
77 case flat_profiler: | |
78 FlatProfiler::oops_do(&roots_closure); | |
79 break; | |
80 | |
81 case system_dictionary: | |
82 SystemDictionary::oops_do(&roots_closure); | |
83 break; | |
84 | |
85 case management: | |
86 Management::oops_do(&roots_closure); | |
87 break; | |
88 | |
89 case jvmti: | |
90 JvmtiExport::oops_do(&roots_closure); | |
91 break; | |
92 | |
93 default: | |
94 fatal("Unknown root type"); | |
95 } | |
96 | |
97 // Do the real work | |
98 pm->drain_stacks(false); | |
99 } | |
100 | |
101 // | |
102 // ThreadRootsTask | |
103 // | |
104 | |
105 void ThreadRootsTask::do_it(GCTaskManager* manager, uint which) { | |
106 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
107 | |
108 PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which); | |
109 PSScavengeRootsClosure roots_closure(pm); | |
110 | |
111 if (_java_thread != NULL) | |
112 _java_thread->oops_do(&roots_closure); | |
113 | |
114 if (_vm_thread != NULL) | |
115 _vm_thread->oops_do(&roots_closure); | |
116 | |
117 // Do the real work | |
118 pm->drain_stacks(false); | |
119 } | |
120 | |
121 // | |
122 // StealTask | |
123 // | |
124 | |
125 StealTask::StealTask(ParallelTaskTerminator* t) : | |
126 _terminator(t) {} | |
127 | |
128 void StealTask::do_it(GCTaskManager* manager, uint which) { | |
129 assert(Universe::heap()->is_gc_active(), "called outside gc"); | |
130 | |
131 PSPromotionManager* pm = | |
132 PSPromotionManager::gc_thread_promotion_manager(which); | |
133 pm->drain_stacks(true); | |
134 guarantee(pm->stacks_empty(), | |
135 "stacks should be empty at this point"); | |
136 | |
137 int random_seed = 17; | |
138 if (pm->depth_first()) { | |
139 while(true) { | |
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140 StarTask p; |
0 | 141 if (PSPromotionManager::steal_depth(which, &random_seed, p)) { |
142 #if PS_PM_STATS | |
143 pm->increment_steals(p); | |
144 #endif // PS_PM_STATS | |
145 pm->process_popped_location_depth(p); | |
146 pm->drain_stacks_depth(true); | |
147 } else { | |
148 if (terminator()->offer_termination()) { | |
149 break; | |
150 } | |
151 } | |
152 } | |
153 } else { | |
154 while(true) { | |
155 oop obj; | |
156 if (PSPromotionManager::steal_breadth(which, &random_seed, obj)) { | |
157 #if PS_PM_STATS | |
158 pm->increment_steals(); | |
159 #endif // PS_PM_STATS | |
160 obj->copy_contents(pm); | |
161 pm->drain_stacks_breadth(true); | |
162 } else { | |
163 if (terminator()->offer_termination()) { | |
164 break; | |
165 } | |
166 } | |
167 } | |
168 } | |
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169 guarantee(pm->stacks_empty(), "stacks should be empty at this point"); |
0 | 170 } |
171 | |
172 // | |
173 // SerialOldToYoungRootsTask | |
174 // | |
175 | |
176 void SerialOldToYoungRootsTask::do_it(GCTaskManager* manager, uint which) { | |
177 assert(_gen != NULL, "Sanity"); | |
178 assert(_gen->object_space()->contains(_gen_top) || _gen_top == _gen->object_space()->top(), "Sanity"); | |
179 | |
180 { | |
181 PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which); | |
182 | |
183 assert(Universe::heap()->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity"); | |
184 CardTableExtension* card_table = (CardTableExtension *)Universe::heap()->barrier_set(); | |
185 // FIX ME! Assert that card_table is the type we believe it to be. | |
186 | |
187 card_table->scavenge_contents(_gen->start_array(), | |
188 _gen->object_space(), | |
189 _gen_top, | |
190 pm); | |
191 | |
192 // Do the real work | |
193 pm->drain_stacks(false); | |
194 } | |
195 } | |
196 | |
197 // | |
198 // OldToYoungRootsTask | |
199 // | |
200 | |
201 void OldToYoungRootsTask::do_it(GCTaskManager* manager, uint which) { | |
202 assert(_gen != NULL, "Sanity"); | |
203 assert(_gen->object_space()->contains(_gen_top) || _gen_top == _gen->object_space()->top(), "Sanity"); | |
204 assert(_stripe_number < ParallelGCThreads, "Sanity"); | |
205 | |
206 { | |
207 PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which); | |
208 | |
209 assert(Universe::heap()->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity"); | |
210 CardTableExtension* card_table = (CardTableExtension *)Universe::heap()->barrier_set(); | |
211 // FIX ME! Assert that card_table is the type we believe it to be. | |
212 | |
213 card_table->scavenge_contents_parallel(_gen->start_array(), | |
214 _gen->object_space(), | |
215 _gen_top, | |
216 pm, | |
217 _stripe_number); | |
218 | |
219 // Do the real work | |
220 pm->drain_stacks(false); | |
221 } | |
222 } |