1 /*
2 * Copyright (c) 2019, 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 *
28 #include "classfile/systemDictionary.hpp"
29 #include "code/codeBehaviours.hpp"
30 #include "code/codeCache.hpp"
31 #include "code/dependencyContext.hpp"
32 #include "gc/shared/gcBehaviours.hpp"
33 #include "gc/shared/suspendibleThreadSet.hpp"
34 #include "gc/shenandoah/shenandoahClosures.inline.hpp"
35 #include "gc/shenandoah/shenandoahCodeRoots.hpp"
36 #include "gc/shenandoah/shenandoahConcurrentRoots.hpp"
37 #include "gc/shenandoah/shenandoahNMethod.inline.hpp"
38 #include "gc/shenandoah/shenandoahLock.hpp"
39 #include "gc/shenandoah/shenandoahRootProcessor.hpp"
40 #include "gc/shenandoah/shenandoahUnload.hpp"
41 #include "gc/shenandoah/shenandoahVerifier.hpp"
42 #include "memory/iterator.hpp"
43 #include "memory/resourceArea.hpp"
44 #include "oops/access.inline.hpp"
45
46 class ShenandoahIsUnloadingOopClosure : public OopClosure {
47 private:
48 ShenandoahMarkingContext* _marking_context;
49 bool _is_unloading;
50
51 public:
52 ShenandoahIsUnloadingOopClosure() :
53 _marking_context(ShenandoahHeap::heap()->marking_context()),
54 _is_unloading(false) {
55 }
56
57 virtual void do_oop(oop* p) {
58 if (_is_unloading) {
59 return;
60 }
61
62 const oop o = RawAccess<>::oop_load(p);
63 if (!CompressedOops::is_null(o) &&
64 _marking_context->is_complete() &&
65 !_marking_context->is_marked(o)) {
66 _is_unloading = true;
67 }
68 }
69
70 virtual void do_oop(narrowOop* p) {
71 ShouldNotReachHere();
72 }
73
74 bool is_unloading() const {
75 return _is_unloading;
76 }
77 };
78
79 class ShenandoahIsUnloadingBehaviour : public IsUnloadingBehaviour {
80 public:
81 virtual bool is_unloading(CompiledMethod* method) const {
82 nmethod* const nm = method->as_nmethod();
83 guarantee(ShenandoahHeap::heap()->is_concurrent_root_in_progress(), "Only this phase");
84 ShenandoahNMethod* data = ShenandoahNMethod::gc_data(nm);
85 ShenandoahReentrantLocker locker(data->lock());
86 ShenandoahIsUnloadingOopClosure cl;
87 data->oops_do(&cl);
88 return cl.is_unloading();
89 }
90 };
91
92 class ShenandoahCompiledICProtectionBehaviour : public CompiledICProtectionBehaviour {
93 public:
94 virtual bool lock(CompiledMethod* method) {
95 nmethod* const nm = method->as_nmethod();
96 ShenandoahReentrantLock* const lock = ShenandoahNMethod::lock_for_nmethod(nm);
97 assert(lock != NULL, "Not yet registered?");
98 lock->lock();
99 return true;
100 }
101
102 virtual void unlock(CompiledMethod* method) {
103 nmethod* const nm = method->as_nmethod();
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1 /*
2 * Copyright (c) 2019, 2020, 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 *
28 #include "classfile/systemDictionary.hpp"
29 #include "code/codeBehaviours.hpp"
30 #include "code/codeCache.hpp"
31 #include "code/dependencyContext.hpp"
32 #include "gc/shared/gcBehaviours.hpp"
33 #include "gc/shared/suspendibleThreadSet.hpp"
34 #include "gc/shenandoah/shenandoahClosures.inline.hpp"
35 #include "gc/shenandoah/shenandoahCodeRoots.hpp"
36 #include "gc/shenandoah/shenandoahConcurrentRoots.hpp"
37 #include "gc/shenandoah/shenandoahNMethod.inline.hpp"
38 #include "gc/shenandoah/shenandoahLock.hpp"
39 #include "gc/shenandoah/shenandoahRootProcessor.hpp"
40 #include "gc/shenandoah/shenandoahUnload.hpp"
41 #include "gc/shenandoah/shenandoahVerifier.hpp"
42 #include "memory/iterator.hpp"
43 #include "memory/resourceArea.hpp"
44 #include "oops/access.inline.hpp"
45
46 class ShenandoahIsUnloadingOopClosure : public OopClosure {
47 private:
48 ShenandoahMarkingContext* const _marking_context;
49 bool _is_unloading;
50
51 public:
52 ShenandoahIsUnloadingOopClosure() :
53 _marking_context(ShenandoahHeap::heap()->complete_marking_context()),
54 _is_unloading(false) {
55 }
56
57 virtual void do_oop(oop* p) {
58 if (_is_unloading) {
59 return;
60 }
61
62 const oop o = RawAccess<>::oop_load(p);
63 if (!CompressedOops::is_null(o) &&
64 !_marking_context->is_marked(o)) {
65 _is_unloading = true;
66 }
67 }
68
69 virtual void do_oop(narrowOop* p) {
70 ShouldNotReachHere();
71 }
72
73 bool is_unloading() const {
74 return _is_unloading;
75 }
76 };
77
78 class ShenandoahIsUnloadingBehaviour : public IsUnloadingBehaviour {
79 public:
80 virtual bool is_unloading(CompiledMethod* method) const {
81 ShenandoahHeap* const heap = ShenandoahHeap::heap();
82 nmethod* const nm = method->as_nmethod();
83
84 if (heap->is_concurrent_mark_in_progress()) {
85 ShenandoahNMethod::keep_metadata_alive(nm);
86 return false;
87 }
88 assert(heap->is_concurrent_root_in_progress(), "What else?");
89 ShenandoahNMethod* data = ShenandoahNMethod::gc_data(nm);
90 ShenandoahReentrantLocker locker(data->lock());
91 ShenandoahIsUnloadingOopClosure cl;
92 data->oops_do(&cl);
93 return cl.is_unloading();
94 }
95 };
96
97 class ShenandoahCompiledICProtectionBehaviour : public CompiledICProtectionBehaviour {
98 public:
99 virtual bool lock(CompiledMethod* method) {
100 nmethod* const nm = method->as_nmethod();
101 ShenandoahReentrantLock* const lock = ShenandoahNMethod::lock_for_nmethod(nm);
102 assert(lock != NULL, "Not yet registered?");
103 lock->lock();
104 return true;
105 }
106
107 virtual void unlock(CompiledMethod* method) {
108 nmethod* const nm = method->as_nmethod();
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