Mercurial > hg > truffle
annotate src/share/tools/whitebox/sun/hotspot/WhiteBox.java @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | 51612f0c0a79 |
| children | 4102b59539ce |
| rev | line source |
|---|---|
| 5915 | 1 /* |
| 2 * Copyright (c) 2012, Oracle and/or its affiliates. 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 package sun.hotspot; | |
| 26 import java.security.BasicPermission; | |
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27 import sun.hotspot.parser.DiagnosticCommand; |
| 5915 | 28 |
| 29 public class WhiteBox { | |
| 30 | |
| 31 @SuppressWarnings("serial") | |
| 32 public static class WhiteBoxPermission extends BasicPermission { | |
| 33 public WhiteBoxPermission(String s) { | |
| 34 super(s); | |
| 35 } | |
| 36 } | |
| 37 | |
| 38 private WhiteBox() {} | |
| 39 private static final WhiteBox instance = new WhiteBox(); | |
| 40 private static native void registerNatives(); | |
| 41 | |
| 42 /** | |
| 43 * Returns the singleton WhiteBox instance. | |
| 44 * | |
| 45 * The returned WhiteBox object should be carefully guarded | |
| 46 * by the caller, since it can be used to read and write data | |
| 47 * at arbitrary memory addresses. It must never be passed to | |
| 48 * untrusted code. | |
| 49 */ | |
| 50 public synchronized static WhiteBox getWhiteBox() { | |
| 51 SecurityManager sm = System.getSecurityManager(); | |
| 52 if (sm != null) { | |
| 53 sm.checkPermission(new WhiteBoxPermission("getInstance")); | |
| 54 } | |
| 55 return instance; | |
| 56 } | |
| 57 | |
| 58 static { | |
| 59 registerNatives(); | |
| 60 } | |
| 61 | |
| 62 // Memory | |
| 63 public native long getObjectAddress(Object o); | |
| 64 public native int getHeapOopSize(); | |
| 65 | |
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66 // Runtime |
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67 // Make sure class name is in the correct format |
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68 public boolean isClassAlive(String name) { |
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69 return isClassAlive0(name.replace('.', '/')); |
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70 } |
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71 private native boolean isClassAlive0(String name); |
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72 |
| 5915 | 73 // G1 |
| 74 public native boolean g1InConcurrentMark(); | |
| 75 public native boolean g1IsHumongous(Object o); | |
| 76 public native long g1NumFreeRegions(); | |
| 77 public native int g1RegionSize(); | |
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78 public native Object[] parseCommandLine(String commandline, DiagnosticCommand[] args); |
| 5915 | 79 } |