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src/hotspot/share/gc/g1/g1StringDedup.cpp

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rev 49290 : [mq]: JDK-8199735.01.patch
   1 /*
   2  * Copyright (c) 2014, 2017, 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 "classfile/javaClasses.inline.hpp"
  27 #include "gc/g1/g1CollectedHeap.inline.hpp"
  28 #include "gc/g1/g1GCPhaseTimes.hpp"
  29 #include "gc/g1/g1StringDedup.hpp"
  30 #include "gc/g1/g1StringDedupQueue.hpp"
  31 #include "gc/g1/g1StringDedupStat.hpp"
  32 #include "gc/g1/g1StringDedupTable.hpp"
  33 #include "gc/g1/g1StringDedupThread.hpp"

  34 #include "runtime/atomic.hpp"
  35 
  36 bool G1StringDedup::_enabled = false;
  37 
  38 void G1StringDedup::initialize() {
  39   assert(UseG1GC, "String deduplication only available with G1");
  40   if (UseStringDeduplication) {
  41     _enabled = true;
  42     G1StringDedupQueue::create();
  43     G1StringDedupTable::create();
  44     G1StringDedupThread::create();
  45   }
  46 }
  47 
  48 void G1StringDedup::stop() {
  49   assert(is_enabled(), "String deduplication not enabled");
  50   G1StringDedupThread::thread()->stop();
  51 }
  52 
  53 bool G1StringDedup::is_candidate_from_mark(oop obj) {


   1 /*
   2  * Copyright (c) 2014, 2018, 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 "classfile/javaClasses.inline.hpp"
  27 #include "gc/g1/g1CollectedHeap.inline.hpp"
  28 #include "gc/g1/g1GCPhaseTimes.hpp"
  29 #include "gc/g1/g1StringDedup.hpp"
  30 #include "gc/g1/g1StringDedupQueue.hpp"
  31 #include "gc/g1/g1StringDedupStat.hpp"
  32 #include "gc/g1/g1StringDedupTable.hpp"
  33 #include "gc/g1/g1StringDedupThread.hpp"
  34 #include "oops/oop.inline.hpp"
  35 #include "runtime/atomic.hpp"
  36 
  37 bool G1StringDedup::_enabled = false;
  38 
  39 void G1StringDedup::initialize() {
  40   assert(UseG1GC, "String deduplication only available with G1");
  41   if (UseStringDeduplication) {
  42     _enabled = true;
  43     G1StringDedupQueue::create();
  44     G1StringDedupTable::create();
  45     G1StringDedupThread::create();
  46   }
  47 }
  48 
  49 void G1StringDedup::stop() {
  50   assert(is_enabled(), "String deduplication not enabled");
  51   G1StringDedupThread::thread()->stop();
  52 }
  53 
  54 bool G1StringDedup::is_candidate_from_mark(oop obj) {


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