Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1StringDedupThread.cpp @ 17976:8e20ef014b08
8043239: G1: Missing post barrier in processing of j.l.ref.Reference objects
Summary: Removed all write barriers during reference processing and added explicit write barriers when iterating through the discovered list.
Reviewed-by: pliden, jmasa, tschatzl
| author | brutisso |
|---|---|
| date | Wed, 11 Jun 2014 10:46:47 +0200 |
| parents | 1772223a25a2 |
| children | 581e70386ec9 |
| rev | line source |
|---|---|
| 17764 | 1 /* |
| 2 * Copyright (c) 2014, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "precompiled.hpp" | |
| 26 #include "gc_implementation/g1/g1Log.hpp" | |
| 27 #include "gc_implementation/g1/g1StringDedup.hpp" | |
| 28 #include "gc_implementation/g1/g1StringDedupTable.hpp" | |
| 29 #include "gc_implementation/g1/g1StringDedupThread.hpp" | |
| 30 #include "gc_implementation/g1/g1StringDedupQueue.hpp" | |
| 31 | |
| 32 G1StringDedupThread* G1StringDedupThread::_thread = NULL; | |
| 33 | |
| 34 G1StringDedupThread::G1StringDedupThread() : | |
| 35 ConcurrentGCThread() { | |
| 36 set_name("String Deduplication Thread"); | |
| 37 create_and_start(); | |
| 38 } | |
| 39 | |
| 40 G1StringDedupThread::~G1StringDedupThread() { | |
| 41 ShouldNotReachHere(); | |
| 42 } | |
| 43 | |
| 44 void G1StringDedupThread::create() { | |
| 45 assert(G1StringDedup::is_enabled(), "String deduplication not enabled"); | |
| 46 assert(_thread == NULL, "One string deduplication thread allowed"); | |
| 47 _thread = new G1StringDedupThread(); | |
| 48 } | |
| 49 | |
| 50 G1StringDedupThread* G1StringDedupThread::thread() { | |
| 51 assert(G1StringDedup::is_enabled(), "String deduplication not enabled"); | |
| 52 assert(_thread != NULL, "String deduplication thread not created"); | |
| 53 return _thread; | |
| 54 } | |
| 55 | |
| 56 void G1StringDedupThread::print_on(outputStream* st) const { | |
| 57 st->print("\"%s\" ", name()); | |
| 58 Thread::print_on(st); | |
| 59 st->cr(); | |
| 60 } | |
| 61 | |
| 62 void G1StringDedupThread::run() { | |
| 63 G1StringDedupStat total_stat; | |
| 64 | |
| 65 initialize_in_thread(); | |
| 66 wait_for_universe_init(); | |
| 67 | |
| 68 // Main loop | |
| 69 for (;;) { | |
| 70 G1StringDedupStat stat; | |
| 71 | |
| 72 stat.mark_idle(); | |
| 73 | |
| 74 // Wait for the queue to become non-empty | |
| 75 G1StringDedupQueue::wait(); | |
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76 if (_should_terminate) { |
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77 break; |
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78 } |
| 17764 | 79 |
| 80 // Include this thread in safepoints | |
| 81 stsJoin(); | |
| 82 | |
| 83 stat.mark_exec(); | |
| 84 | |
| 85 // Process the queue | |
| 86 for (;;) { | |
| 87 oop java_string = G1StringDedupQueue::pop(); | |
| 88 if (java_string == NULL) { | |
| 89 break; | |
| 90 } | |
| 91 | |
| 92 G1StringDedupTable::deduplicate(java_string, stat); | |
| 93 | |
| 94 // Safepoint this thread if needed | |
| 95 if (stsShouldYield()) { | |
| 96 stat.mark_block(); | |
| 97 stsYield(NULL); | |
| 98 stat.mark_unblock(); | |
| 99 } | |
| 100 } | |
| 101 | |
| 102 G1StringDedupTable::trim_entry_cache(); | |
| 103 | |
| 104 stat.mark_done(); | |
| 105 | |
| 106 // Print statistics | |
| 107 total_stat.add(stat); | |
| 108 print(gclog_or_tty, stat, total_stat); | |
| 109 | |
| 110 // Exclude this thread from safepoints | |
| 111 stsLeave(); | |
| 112 } | |
| 113 | |
|
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114 terminate(); |
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115 } |
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116 |
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117 void G1StringDedupThread::stop() { |
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118 { |
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119 MonitorLockerEx ml(Terminator_lock); |
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120 _thread->_should_terminate = true; |
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121 } |
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122 |
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123 G1StringDedupQueue::cancel_wait(); |
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124 |
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125 { |
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126 MonitorLockerEx ml(Terminator_lock); |
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127 while (!_thread->_has_terminated) { |
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128 ml.wait(); |
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129 } |
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130 } |
| 17764 | 131 } |
| 132 | |
| 133 void G1StringDedupThread::print(outputStream* st, const G1StringDedupStat& last_stat, const G1StringDedupStat& total_stat) { | |
| 134 if (G1Log::fine() || PrintStringDeduplicationStatistics) { | |
| 135 G1StringDedupStat::print_summary(st, last_stat, total_stat); | |
| 136 if (PrintStringDeduplicationStatistics) { | |
| 137 G1StringDedupStat::print_statistics(st, last_stat, false); | |
| 138 G1StringDedupStat::print_statistics(st, total_stat, true); | |
| 139 G1StringDedupTable::print_statistics(st); | |
| 140 G1StringDedupQueue::print_statistics(st); | |
| 141 } | |
| 142 } | |
| 143 } |