Mercurial > hg > graal-jvmci-8

annotate jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotJVMCIMetaAccessContext.java @ 24225:a2dbb6fcc923

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Added tag jvmci-0.33 for changeset 3aed4cb813f4
author Doug Simon <doug.simon@oracle.com>
date Fri, 18 Aug 2017 22:47:33 +0200
parents 05922ce51c5e
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
22454
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
1 /*
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
4 *
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
5 * This code is free software; you can redistribute it and/or modify it
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
6 * under the terms of the GNU General Public License version 2 only, as
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
7 * published by the Free Software Foundation.
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
8 *
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
9 * This code is distributed in the hope that it will be useful, but WITHOUT
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
12 * version 2 for more details (a copy is included in the LICENSE file that
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
13 * accompanied this code).
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
14 *
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
15 * You should have received a copy of the GNU General Public License version
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
16 * 2 along with this work; if not, write to the Free Software Foundation,
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
18 *
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
20 * or visit www.oracle.com if you need additional information or have any
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
21 * questions.
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
22 */
22672
1bbd4a7c274b Rename jdk.internal.jvmci to jdk.vm.ci
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 22569
diff changeset
23 package jdk.vm.ci.hotspot;
22454
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
24
22569
ec96f33a101d updated imports to be explicit and added checkstyle rule to forbid * imports
Doug Simon <doug.simon@oracle.com>
parents: 22536
diff changeset
25 import java.lang.ref.Reference;
ec96f33a101d updated imports to be explicit and added checkstyle rule to forbid * imports
Doug Simon <doug.simon@oracle.com>
parents: 22536
diff changeset
26 import java.lang.ref.ReferenceQueue;
ec96f33a101d updated imports to be explicit and added checkstyle rule to forbid * imports
Doug Simon <doug.simon@oracle.com>
parents: 22536
diff changeset
27 import java.lang.ref.WeakReference;
ec96f33a101d updated imports to be explicit and added checkstyle rule to forbid * imports
Doug Simon <doug.simon@oracle.com>
parents: 22536
diff changeset
28 import java.util.Arrays;
ec96f33a101d updated imports to be explicit and added checkstyle rule to forbid * imports
Doug Simon <doug.simon@oracle.com>
parents: 22536
diff changeset
29 import java.util.Iterator;
22454
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
30
22672
1bbd4a7c274b Rename jdk.internal.jvmci to jdk.vm.ci
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 22569
diff changeset
31 import jdk.vm.ci.meta.JavaKind;
1bbd4a7c274b Rename jdk.internal.jvmci to jdk.vm.ci
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 22569
diff changeset
32 import jdk.vm.ci.meta.ResolvedJavaType;
22454
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
33
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
34 /**
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
35 * This class manages the set of metadata roots that must be scanned during garbage collection.
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
36 * Because of class redefinition Method* and ConstantPool* can be freed if they don't appear to be
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
37 * in use so they must be tracked when there are live references to them from Java.
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
38 *
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
39 * The general theory of operation is that all {@link MetaspaceWrapperObject}s are created by
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
40 * calling into the VM which calls back out to actually create the wrapper instance. During the call
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
41 * the VM keeps the metadata reference alive through the use of metadata handles. Once the call
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
42 * completes the wrapper object is registered here and will be scanned during metadata scanning. The
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
43 * weakness of the reference to the wrapper object allows them to be reclaimed when they are no
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
44 * longer used.
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
45 *
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
46 */
23393
1d4ce2d19e52 clean up and minimize JVMCI (JDK-8156835)
Doug Simon <doug.simon@oracle.com>
parents: 22672
diff changeset
47 public class HotSpotJVMCIMetaAccessContext {
22454
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
48
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
49 /**
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
50 * The set of currently live contexts used for tracking of live metadata. Examined from the VM
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
51 * during garbage collection.
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
52 */
22505
575eb1036ea9 fixed all existing -Xlint warnings
Doug Simon <doug.simon@oracle.com>
parents: 22454
diff changeset
53 private static WeakReference<?>[] allContexts = new WeakReference<?>[0];
22454
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
54
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
55 /**
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
56 * This is a chunked list of metadata roots. It can be read from VM native code so it's been
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
57 * marked volatile to ensure the order of updates are respected.
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
58 */
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
59 private volatile Object[] metadataRoots;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
60
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
61 private ChunkedList<WeakReference<MetaspaceWrapperObject>> list = new ChunkedList<>();
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
62
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
63 /**
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
64 * The number of weak references freed since the last time the list was shrunk.
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
65 */
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
66 private int freed;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
67
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
68 /**
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
69 * The {@link ReferenceQueue} tracking the weak references created by this context.
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
70 */
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
71 private final ReferenceQueue<MetaspaceWrapperObject> queue = new ReferenceQueue<>();
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
72
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
73 static synchronized void add(HotSpotJVMCIMetaAccessContext context) {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
74 for (int i = 0; i < allContexts.length; i++) {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
75 if (allContexts[i] == null || allContexts[i].get() == null) {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
76 allContexts[i] = new WeakReference<>(context);
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
77 return;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
78 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
79 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
80 int index = allContexts.length;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
81 allContexts = Arrays.copyOf(allContexts, index + 2);
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
82 allContexts[index] = new WeakReference<>(context);
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
83 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
84
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
85 HotSpotJVMCIMetaAccessContext() {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
86 add(this);
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
87 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
88
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
89 /**
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
90 * Periodically trim the list of tracked metadata. A new list is created to replace the old to
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
91 * avoid concurrent scanning issues.
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
92 */
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
93 private void clean() {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
94 Reference<?> ref = queue.poll();
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
95 if (ref == null) {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
96 return;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
97 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
98 while (ref != null) {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
99 freed++;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
100 ref = queue.poll();
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
101 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
102 if (freed > list.size() / 2) {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
103 ChunkedList<WeakReference<MetaspaceWrapperObject>> newList = new ChunkedList<>();
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
104 for (WeakReference<MetaspaceWrapperObject> element : list) {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
105 /*
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
106 * The referent could become null anywhere in here but it doesn't matter. It will
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
107 * get cleaned up next time.
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
108 */
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
109 if (element != null && element.get() != null) {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
110 newList.add(element);
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
111 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
112 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
113 list = newList;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
114 metadataRoots = list.getHead();
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
115 freed = 0;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
116 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
117 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
118
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
119 /**
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
120 * Add a {@link MetaspaceWrapperObject} to tracked by the GC. It's assumed that the caller is
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
121 * responsible for keeping the reference alive for the duration of the call. Once registration
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
122 * is complete then the VM will ensure it's kept alive.
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
123 *
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
124 * @param metaspaceObject
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
125 */
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
126
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
127 public synchronized void add(MetaspaceWrapperObject metaspaceObject) {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
128 clean();
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
129 list.add(new WeakReference<>(metaspaceObject, queue));
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
130 if (list.getHead() != metadataRoots) {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
131 /*
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
132 * The list enlarged so update the head.
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
133 */
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
134 metadataRoots = list.getHead();
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
135 }
23677
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23671
diff changeset
136 assert isRegistered(metaspaceObject);
22454
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
137 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
138
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
139 protected ResolvedJavaType createClass(Class<?> javaClass) {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
140 if (javaClass.isPrimitive()) {
22536
dc1aeef79e7e Refactoring: Rename Kind to JavaKind.
Roland Schatz <roland.schatz@oracle.com>
parents: 22505
diff changeset
141 JavaKind kind = JavaKind.fromJavaClass(javaClass);
22454
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
142 return new HotSpotResolvedPrimitiveType(kind);
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
143 } else {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
144 return new HotSpotResolvedObjectTypeImpl(javaClass, this);
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
145 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
146 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
147
23985
05922ce51c5e Restore extra level of weakness in the ResolvedJavaType cache
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23710
diff changeset
148 private final ClassValue<WeakReference<ResolvedJavaType>> resolvedJavaType = new ClassValue<WeakReference<ResolvedJavaType>>() {
23710
927a39cd7ddd Use ClassValue instead of WeakHashMap to track ResolvedJavaTypes
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23677
diff changeset
149 @Override
23985
05922ce51c5e Restore extra level of weakness in the ResolvedJavaType cache
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23710
diff changeset
150 protected WeakReference<ResolvedJavaType> computeValue(Class<?> type) {
05922ce51c5e Restore extra level of weakness in the ResolvedJavaType cache
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23710
diff changeset
151 return new WeakReference<>(createClass(type));
23710
927a39cd7ddd Use ClassValue instead of WeakHashMap to track ResolvedJavaTypes
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23677
diff changeset
152 }
927a39cd7ddd Use ClassValue instead of WeakHashMap to track ResolvedJavaTypes
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23677
diff changeset
153 };
22454
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
154
23393
1d4ce2d19e52 clean up and minimize JVMCI (JDK-8156835)
Doug Simon <doug.simon@oracle.com>
parents: 22672
diff changeset
155 /**
1d4ce2d19e52 clean up and minimize JVMCI (JDK-8156835)
Doug Simon <doug.simon@oracle.com>
parents: 22672
diff changeset
156 * Gets the JVMCI mirror for a {@link Class} object.
1d4ce2d19e52 clean up and minimize JVMCI (JDK-8156835)
Doug Simon <doug.simon@oracle.com>
parents: 22672
diff changeset
157 *
1d4ce2d19e52 clean up and minimize JVMCI (JDK-8156835)
Doug Simon <doug.simon@oracle.com>
parents: 22672
diff changeset
158 * @return the {@link ResolvedJavaType} corresponding to {@code javaClass}
1d4ce2d19e52 clean up and minimize JVMCI (JDK-8156835)
Doug Simon <doug.simon@oracle.com>
parents: 22672
diff changeset
159 */
23985
05922ce51c5e Restore extra level of weakness in the ResolvedJavaType cache
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23710
diff changeset
160 public ResolvedJavaType fromClass(Class<?> javaClass) {
05922ce51c5e Restore extra level of weakness in the ResolvedJavaType cache
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23710
diff changeset
161 ResolvedJavaType javaType = null;
05922ce51c5e Restore extra level of weakness in the ResolvedJavaType cache
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23710
diff changeset
162 while (javaType == null) {
05922ce51c5e Restore extra level of weakness in the ResolvedJavaType cache
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23710
diff changeset
163 WeakReference<ResolvedJavaType> type = resolvedJavaType.get(javaClass);
05922ce51c5e Restore extra level of weakness in the ResolvedJavaType cache
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23710
diff changeset
164 javaType = type.get();
05922ce51c5e Restore extra level of weakness in the ResolvedJavaType cache
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23710
diff changeset
165 if (javaType == null) {
05922ce51c5e Restore extra level of weakness in the ResolvedJavaType cache
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23710
diff changeset
166 resolvedJavaType.remove(javaClass);
05922ce51c5e Restore extra level of weakness in the ResolvedJavaType cache
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23710
diff changeset
167 }
05922ce51c5e Restore extra level of weakness in the ResolvedJavaType cache
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23710
diff changeset
168 }
05922ce51c5e Restore extra level of weakness in the ResolvedJavaType cache
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23710
diff changeset
169 return javaType;
22454
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
170 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
171
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
172 /**
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
173 * A very simple append only chunked list implementation.
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
174 */
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
175 static class ChunkedList<T> implements Iterable<T> {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
176 private static final int CHUNK_SIZE = 32;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
177
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
178 private static final int NEXT_CHUNK_INDEX = CHUNK_SIZE - 1;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
179
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
180 private Object[] head;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
181 private int index;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
182 private int size;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
183
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
184 ChunkedList() {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
185 head = new Object[CHUNK_SIZE];
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
186 index = 0;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
187 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
188
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
189 void add(T element) {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
190 if (index == NEXT_CHUNK_INDEX) {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
191 Object[] newHead = new Object[CHUNK_SIZE];
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
192 newHead[index] = head;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
193 head = newHead;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
194 index = 0;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
195 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
196 head[index++] = element;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
197 size++;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
198 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
199
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
200 Object[] getHead() {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
201 return head;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
202 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
203
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
204 public Iterator<T> iterator() {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
205 return new ChunkIterator<>();
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
206 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
207
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
208 int size() {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
209 return size;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
210 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
211
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
212 class ChunkIterator<V> implements Iterator<V> {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
213
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
214 ChunkIterator() {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
215 currentChunk = head;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
216 currentIndex = -1;
23677
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23671
diff changeset
217 next = findNext();
22454
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
218 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
219
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
220 Object[] currentChunk;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
221 int currentIndex;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
222 V next;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
223
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
224 @SuppressWarnings("unchecked")
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
225 V findNext() {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
226 V result;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
227 do {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
228 currentIndex++;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
229 if (currentIndex == NEXT_CHUNK_INDEX) {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
230 currentChunk = (Object[]) currentChunk[currentIndex];
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
231 currentIndex = 0;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
232 if (currentChunk == null) {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
233 return null;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
234 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
235 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
236 result = (V) currentChunk[currentIndex];
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
237 } while (result == null);
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
238 return result;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
239 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
240
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
241 public boolean hasNext() {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
242 return next != null;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
243 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
244
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
245 public V next() {
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
246 V result = next;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
247 next = findNext();
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
248 return result;
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
249 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
250
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
251 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
252
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
253 }
23677
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23671
diff changeset
254
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23671
diff changeset
255 synchronized boolean isRegistered(MetaspaceWrapperObject wrapper) {
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23671
diff changeset
256 for (WeakReference<MetaspaceWrapperObject> m : list) {
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23671
diff changeset
257 if (m != null && m.get() == wrapper) {
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23671
diff changeset
258 return true;
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23671
diff changeset
259 }
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23671
diff changeset
260 }
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23671
diff changeset
261 return false;
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 23671
diff changeset
262 }
22454
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
diff changeset
263 }