1 /*

     2  * Copyright (c) 2015, 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 #include "precompiled.hpp"

    25 #include "gc/z/zHeap.inline.hpp"

    26 #include "gc/z/zOopClosures.inline.hpp"

    27 #include "gc/z/zStat.hpp"

    28 #include "gc/z/zTask.hpp"

    29 #include "gc/z/zThread.hpp"

    30 #include "runtime/jniHandles.hpp"

    31 

    32 ZWeakRootsProcessor::ZWeakRootsProcessor(ZWorkers* workers) :

    33     _workers(workers) {}

    34 

    35 class ZProcessWeakRootsTask : public ZTask {

    36 private:

    37   ZWeakRootsIterator _weak_roots;

    38 

    39 public:

    40   ZProcessWeakRootsTask() :

    41       ZTask("ZProcessWeakRootsTask"),

    42       _weak_roots() {}

    43 

    44   virtual void work() {

    45     ZPhantomIsAliveObjectClosure is_alive;

    46     ZPhantomKeepAliveOopClosure keep_alive;

    47     _weak_roots.weak_oops_do(&is_alive, &keep_alive);

    48   }

    49 };

    50 

    51 void ZWeakRootsProcessor::process_weak_roots() {

    52   ZProcessWeakRootsTask task;

    53   _workers->run_parallel(&task);

    54 }

    55 

    56 class ZProcessConcurrentWeakRootsTask : public ZTask {

    57 private:

    58   ZConcurrentWeakRootsIterator _concurrent_weak_roots;

    59 

    60 public:

    61   ZProcessConcurrentWeakRootsTask() :

    62       ZTask("ZProcessConccurentWeakRootsTask"),

    63       _concurrent_weak_roots() {}

    64 

    65   virtual void work() {

    66     ZPhantomCleanOopClosure cl;

    67     _concurrent_weak_roots.oops_do(&cl);

    68   }

    69 };

    70 

    71 void ZWeakRootsProcessor::process_concurrent_weak_roots() {

    72   ZProcessConcurrentWeakRootsTask task;

    73   _workers->run_concurrent(&task);

    74 }