1 /*
   2  * Copyright (c) 2001, 2009, 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 // CopyrightVersion 1.2








  26 
  27 # include "incls/_precompiled.incl"
  28 # include "incls/_concurrentGCThread.cpp.incl"
  29 
  30 int  ConcurrentGCThread::_CGC_flag            = CGC_nil;
  31 
  32 SuspendibleThreadSet ConcurrentGCThread::_sts;
  33 
  34 ConcurrentGCThread::ConcurrentGCThread() :
  35   _should_terminate(false), _has_terminated(false) {
  36   _sts.initialize();
  37 };
  38 
  39 void ConcurrentGCThread::stopWorldAndDo(VoidClosure* op) {
  40   MutexLockerEx x(Heap_lock,
  41                   Mutex::_no_safepoint_check_flag);
  42   // warning("CGC: about to try stopping world");
  43   SafepointSynchronize::begin();
  44   // warning("CGC: successfully stopped world");
  45   op->do_void();
  46   SafepointSynchronize::end();
  47   // warning("CGC: successfully restarted world");
  48 }

   1 /*
   2  * Copyright (c) 2001, 2010, 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/systemDictionary.hpp"
  27 #include "gc_implementation/shared/concurrentGCThread.hpp"
  28 #include "oops/instanceRefKlass.hpp"
  29 #include "oops/oop.inline.hpp"
  30 #include "runtime/init.hpp"
  31 #include "runtime/interfaceSupport.hpp"
  32 #include "runtime/java.hpp"
  33 #include "runtime/javaCalls.hpp"
  34 
  35 // CopyrightVersion 1.2

  36 
  37 int  ConcurrentGCThread::_CGC_flag            = CGC_nil;
  38 
  39 SuspendibleThreadSet ConcurrentGCThread::_sts;
  40 
  41 ConcurrentGCThread::ConcurrentGCThread() :
  42   _should_terminate(false), _has_terminated(false) {
  43   _sts.initialize();
  44 };
  45 
  46 void ConcurrentGCThread::stopWorldAndDo(VoidClosure* op) {
  47   MutexLockerEx x(Heap_lock,
  48                   Mutex::_no_safepoint_check_flag);
  49   // warning("CGC: about to try stopping world");
  50   SafepointSynchronize::begin();
  51   // warning("CGC: successfully stopped world");
  52   op->do_void();
  53   SafepointSynchronize::end();
  54   // warning("CGC: successfully restarted world");
  55 }