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 }