1 /*
2 * Copyright (c) 2019, Red Hat, Inc. All rights reserved.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation.
7 *
8 * This code is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
11 * version 2 for more details (a copy is included in the LICENSE file that
12 * accompanied this code).
13 *
14 * You should have received a copy of the GNU General Public License version
15 * 2 along with this work; if not, write to the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
19 * or visit www.oracle.com if you need additional information or have any
20 * questions.
21 *
22 */
23
24
25 #include "precompiled.hpp"
26
27 #include "gc/shenandoah/shenandoahClosures.inline.hpp"
28 #include "gc/shenandoah/shenandoahCodeRoots.hpp"
29 #include "gc/shenandoah/shenandoahEvacOOMHandler.hpp"
30 #include "gc/shenandoah/shenandoahParallelCleaning.hpp"
31 #include "runtime/safepoint.hpp"
32
ShenandoahClassUnloadingTask(BoolObjectClosure * is_alive,uint num_workers,bool unloading_occurred)33 ShenandoahClassUnloadingTask::ShenandoahClassUnloadingTask(BoolObjectClosure* is_alive,
34 uint num_workers,
35 bool unloading_occurred) :
36 AbstractGangTask("Parallel Class Unloading Task"),
37 _unloading_occurred(unloading_occurred),
38 _code_cache_task(num_workers, is_alive, unloading_occurred),
39 _klass_cleaning_task() {
40 assert(SafepointSynchronize::is_at_safepoint(), "Must be at a safepoint");
41 }
42
work(uint worker_id)43 void ShenandoahClassUnloadingTask::work(uint worker_id) {
44 _code_cache_task.work(worker_id);
45 // Clean all klasses that were not unloaded.
46 // The weak metadata in klass doesn't need to be
47 // processed if there was no unloading.
48 if (_unloading_occurred) {
49 _klass_cleaning_task.work();
50 }
51 }
52