Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/JNIHandles.java @ 12226:7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
Reviewed-by: coleenp, mgerdin, hseigel
| author | ehelin |
|---|---|
| date | Mon, 12 Aug 2013 17:37:02 +0200 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2000, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.runtime; | |
| 26 | |
| 27 import java.util.*; | |
| 28 import sun.jvm.hotspot.debugger.*; | |
| 29 import sun.jvm.hotspot.types.*; | |
| 30 | |
| 31 public class JNIHandles { | |
| 32 private static AddressField globalHandlesField; | |
| 33 private static AddressField weakGlobalHandlesField; | |
| 34 private static OopField deletedHandleField; | |
| 35 | |
| 36 static { | |
| 37 VM.registerVMInitializedObserver(new Observer() { | |
| 38 public void update(Observable o, Object data) { | |
| 39 initialize(VM.getVM().getTypeDataBase()); | |
| 40 } | |
| 41 }); | |
| 42 } | |
| 43 | |
| 44 private static synchronized void initialize(TypeDataBase db) { | |
| 45 Type type = db.lookupType("JNIHandles"); | |
| 46 | |
| 47 globalHandlesField = type.getAddressField("_global_handles"); | |
| 48 weakGlobalHandlesField = type.getAddressField("_weak_global_handles"); | |
| 49 deletedHandleField = type.getOopField("_deleted_handle"); | |
| 50 | |
| 51 } | |
| 52 | |
| 53 public JNIHandles() { | |
| 54 } | |
| 55 | |
| 56 public JNIHandleBlock globalHandles() { | |
| 57 Address handleAddr = globalHandlesField.getValue(); | |
| 58 if (handleAddr == null) { | |
| 59 return null; | |
| 60 } | |
| 61 return new JNIHandleBlock(handleAddr); | |
| 62 } | |
| 63 | |
| 64 public JNIHandleBlock weakGlobalHandles() { | |
| 65 Address handleAddr = weakGlobalHandlesField.getValue(); | |
| 66 if (handleAddr == null) { | |
| 67 return null; | |
| 68 } | |
| 69 return new JNIHandleBlock(handleAddr); | |
| 70 } | |
| 71 | |
| 72 public OopHandle deletedHandle() { | |
| 73 return deletedHandleField.getValue(); | |
| 74 } | |
| 75 | |
| 76 public boolean isDeletedHandle(OopHandle handle) { | |
| 77 return (handle != null && handle.equals(deletedHandle())); | |
| 78 } | |
| 79 | |
| 80 } |