1 /*
2 * Copyright (c) 2013, 2021, Red Hat, Inc. 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
27 #include "gc/shenandoah/shenandoahConcurrentGC.hpp"
28 #include "gc/shenandoah/shenandoahDegeneratedGC.hpp"
29 #include "gc/shenandoah/shenandoahFullGC.hpp"
30 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
31 #include "gc/shenandoah/shenandoahUtils.hpp"
32 #include "gc/shenandoah/shenandoahVMOperations.hpp"
33 #include "interpreter/oopMapCache.hpp"
34 #include "memory/universe.hpp"
35
36 bool VM_ShenandoahOperation::doit_prologue() {
37 assert(!ShenandoahHeap::heap()->has_gc_state_changed(), "GC State can only be changed on a safepoint.");
38 return true;
39 }
40
41 void VM_ShenandoahOperation::doit_epilogue() {
42 assert(!ShenandoahHeap::heap()->has_gc_state_changed(), "GC State was not synchronized to java threads.");
43 // GC thread root traversal likely used OopMapCache a lot, which
44 // might have created lots of old entries. Trigger the cleanup now.
45 OopMapCache::try_trigger_cleanup();
46 }
47
48 bool VM_ShenandoahReferenceOperation::doit_prologue() {
49 VM_ShenandoahOperation::doit_prologue();
50 Heap_lock->lock();
51 return true;
52 }
53
54 void VM_ShenandoahReferenceOperation::doit_epilogue() {
55 VM_ShenandoahOperation::doit_epilogue();
56 if (Universe::has_reference_pending_list()) {
57 Heap_lock->notify_all();
58 }
59 Heap_lock->unlock();
60 }
61
62 void VM_ShenandoahInitMark::doit() {
63 ShenandoahGCPauseMark mark(_gc_id, "Init Mark", SvcGCMarker::CONCURRENT);
64 _gc->entry_init_mark();
65 ShenandoahHeap::heap()->propagate_gc_state_to_java_threads();
66 }
67
68 void VM_ShenandoahFinalMarkStartEvac::doit() {
69 ShenandoahGCPauseMark mark(_gc_id, "Final Mark", SvcGCMarker::CONCURRENT);
70 _gc->entry_final_mark();
71 ShenandoahHeap::heap()->propagate_gc_state_to_java_threads();
72 }
73
74 void VM_ShenandoahFullGC::doit() {
75 ShenandoahGCPauseMark mark(_gc_id, "Full GC", SvcGCMarker::FULL);
76 _full_gc->entry_full(_gc_cause);
77 ShenandoahHeap::heap()->propagate_gc_state_to_java_threads();
78 }
79
80 void VM_ShenandoahDegeneratedGC::doit() {
81 ShenandoahGCPauseMark mark(_gc_id, "Degenerated GC", SvcGCMarker::CONCURRENT);
82 _gc->entry_degenerated();
83 ShenandoahHeap::heap()->propagate_gc_state_to_java_threads();
84 }
85
86 void VM_ShenandoahInitUpdateRefs::doit() {
87 ShenandoahGCPauseMark mark(_gc_id, "Init Update Refs", SvcGCMarker::CONCURRENT);
88 _gc->entry_init_updaterefs();
89 ShenandoahHeap::heap()->propagate_gc_state_to_java_threads();
90 }
91
92 void VM_ShenandoahFinalUpdateRefs::doit() {
93 ShenandoahGCPauseMark mark(_gc_id, "Final Update Refs", SvcGCMarker::CONCURRENT);
94 _gc->entry_final_updaterefs();
95 ShenandoahHeap::heap()->propagate_gc_state_to_java_threads();
96 }
97
98 void VM_ShenandoahFinalRoots::doit() {
99 ShenandoahGCPauseMark mark(_gc_id, "Final Roots", SvcGCMarker::CONCURRENT);
100 _gc->entry_final_roots();
101 ShenandoahHeap::heap()->propagate_gc_state_to_java_threads();
102 }