Mercurial > hg > graal-compiler
comparison src/share/vm/gc_implementation/g1/satbQueue.cpp @ 342:37f87013dfd8
6711316: Open source the Garbage-First garbage collector
Summary: First mercurial integration of the code for the Garbage-First garbage collector.
Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr
author | ysr |
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date | Thu, 05 Jun 2008 15:57:56 -0700 |
parents | |
children | df6caf649ff7 |
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189:0b27f3512f9e | 342:37f87013dfd8 |
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1 /* | |
2 * Copyright 2001-2007 Sun Microsystems, Inc. All Rights Reserved. | |
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/_satbQueue.cpp.incl" | |
27 | |
28 void ObjPtrQueue::apply_closure(ObjectClosure* cl) { | |
29 if (_buf != NULL) { | |
30 apply_closure_to_buffer(cl, _buf, _index, _sz); | |
31 _index = _sz; | |
32 } | |
33 } | |
34 | |
35 void ObjPtrQueue::apply_closure_to_buffer(ObjectClosure* cl, | |
36 void** buf, size_t index, size_t sz) { | |
37 if (cl == NULL) return; | |
38 for (size_t i = index; i < sz; i += oopSize) { | |
39 oop obj = (oop)buf[byte_index_to_index((int)i)]; | |
40 // There can be NULL entries because of destructors. | |
41 if (obj != NULL) { | |
42 cl->do_object(obj); | |
43 } | |
44 } | |
45 } | |
46 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
47 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
48 #endif // _MSC_VER | |
49 | |
50 | |
51 SATBMarkQueueSet::SATBMarkQueueSet() : | |
52 PtrQueueSet(), | |
53 _closure(NULL), _par_closures(NULL), | |
54 _shared_satb_queue(this, true /*perm*/) | |
55 {} | |
56 | |
57 void SATBMarkQueueSet::initialize(Monitor* cbl_mon, Mutex* fl_lock, | |
58 int max_completed_queue, | |
59 Mutex* lock) { | |
60 PtrQueueSet::initialize(cbl_mon, fl_lock, max_completed_queue); | |
61 _shared_satb_queue.set_lock(lock); | |
62 if (ParallelGCThreads > 0) { | |
63 _par_closures = NEW_C_HEAP_ARRAY(ObjectClosure*, ParallelGCThreads); | |
64 } | |
65 } | |
66 | |
67 | |
68 void SATBMarkQueueSet::handle_zero_index_for_thread(JavaThread* t) { | |
69 t->satb_mark_queue().handle_zero_index(); | |
70 } | |
71 | |
72 void SATBMarkQueueSet::set_active_all_threads(bool b) { | |
73 _all_active = b; | |
74 for(JavaThread* t = Threads::first(); t; t = t->next()) { | |
75 t->satb_mark_queue().set_active(b); | |
76 } | |
77 } | |
78 | |
79 void SATBMarkQueueSet::set_closure(ObjectClosure* closure) { | |
80 _closure = closure; | |
81 } | |
82 | |
83 void SATBMarkQueueSet::set_par_closure(int i, ObjectClosure* par_closure) { | |
84 assert(ParallelGCThreads > 0 && _par_closures != NULL, "Precondition"); | |
85 _par_closures[i] = par_closure; | |
86 } | |
87 | |
88 void SATBMarkQueueSet::iterate_closure_all_threads() { | |
89 for(JavaThread* t = Threads::first(); t; t = t->next()) { | |
90 t->satb_mark_queue().apply_closure(_closure); | |
91 } | |
92 shared_satb_queue()->apply_closure(_closure); | |
93 } | |
94 | |
95 void SATBMarkQueueSet::par_iterate_closure_all_threads(int worker) { | |
96 SharedHeap* sh = SharedHeap::heap(); | |
97 int parity = sh->strong_roots_parity(); | |
98 | |
99 for(JavaThread* t = Threads::first(); t; t = t->next()) { | |
100 if (t->claim_oops_do(true, parity)) { | |
101 t->satb_mark_queue().apply_closure(_par_closures[worker]); | |
102 } | |
103 } | |
104 // We'll have worker 0 do this one. | |
105 if (worker == 0) { | |
106 shared_satb_queue()->apply_closure(_par_closures[0]); | |
107 } | |
108 } | |
109 | |
110 bool SATBMarkQueueSet::apply_closure_to_completed_buffer_work(bool par, | |
111 int worker) { | |
112 CompletedBufferNode* nd = NULL; | |
113 { | |
114 MutexLockerEx x(_cbl_mon, Mutex::_no_safepoint_check_flag); | |
115 if (_completed_buffers_head != NULL) { | |
116 nd = _completed_buffers_head; | |
117 _completed_buffers_head = nd->next; | |
118 if (_completed_buffers_head == NULL) _completed_buffers_tail = NULL; | |
119 _n_completed_buffers--; | |
120 if (_n_completed_buffers == 0) _process_completed = false; | |
121 } | |
122 } | |
123 ObjectClosure* cl = (par ? _par_closures[worker] : _closure); | |
124 if (nd != NULL) { | |
125 ObjPtrQueue::apply_closure_to_buffer(cl, nd->buf, 0, _sz); | |
126 deallocate_buffer(nd->buf); | |
127 delete nd; | |
128 return true; | |
129 } else { | |
130 return false; | |
131 } | |
132 } | |
133 | |
134 void SATBMarkQueueSet::abandon_partial_marking() { | |
135 CompletedBufferNode* buffers_to_delete = NULL; | |
136 { | |
137 MutexLockerEx x(_cbl_mon, Mutex::_no_safepoint_check_flag); | |
138 while (_completed_buffers_head != NULL) { | |
139 CompletedBufferNode* nd = _completed_buffers_head; | |
140 _completed_buffers_head = nd->next; | |
141 nd->next = buffers_to_delete; | |
142 buffers_to_delete = nd; | |
143 } | |
144 _completed_buffers_tail = NULL; | |
145 _n_completed_buffers = 0; | |
146 debug_only(assert_completed_buffer_list_len_correct_locked()); | |
147 } | |
148 while (buffers_to_delete != NULL) { | |
149 CompletedBufferNode* nd = buffers_to_delete; | |
150 buffers_to_delete = nd->next; | |
151 deallocate_buffer(nd->buf); | |
152 delete nd; | |
153 } | |
154 assert(SafepointSynchronize::is_at_safepoint(), "Must be at safepoint."); | |
155 // So we can safely manipulate these queues. | |
156 for (JavaThread* t = Threads::first(); t; t = t->next()) { | |
157 t->satb_mark_queue().reset(); | |
158 } | |
159 shared_satb_queue()->reset(); | |
160 } |