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annotate src/share/tools/whitebox/sun/hotspot/WhiteBox.java @ 8051:12e01444ca2d

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8006683: Add WhiteBox API to testing of compiler Reviewed-by: kvn, vlivanov
author iignatyev
date Wed, 13 Feb 2013 08:29:04 -0800
parents 4102b59539ce
children
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1 /*
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2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 package sun.hotspot;
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26
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27 import java.lang.reflect.Method;
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28 import java.security.BasicPermission;
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29 import sun.hotspot.parser.DiagnosticCommand;
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30
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31 public class WhiteBox {
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32
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33 @SuppressWarnings("serial")
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34 public static class WhiteBoxPermission extends BasicPermission {
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35 public WhiteBoxPermission(String s) {
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36 super(s);
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37 }
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38 }
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39
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40 private WhiteBox() {}
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41 private static final WhiteBox instance = new WhiteBox();
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42 private static native void registerNatives();
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43
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44 /**
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45 * Returns the singleton WhiteBox instance.
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46 *
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47 * The returned WhiteBox object should be carefully guarded
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48 * by the caller, since it can be used to read and write data
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49 * at arbitrary memory addresses. It must never be passed to
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50 * untrusted code.
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51 */
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52 public synchronized static WhiteBox getWhiteBox() {
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53 SecurityManager sm = System.getSecurityManager();
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54 if (sm != null) {
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55 sm.checkPermission(new WhiteBoxPermission("getInstance"));
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56 }
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57 return instance;
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58 }
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59
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60 static {
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61 registerNatives();
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62 }
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63
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64 // Memory
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65 public native long getObjectAddress(Object o);
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66 public native int getHeapOopSize();
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67
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68 // Runtime
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69 // Make sure class name is in the correct format
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70 public boolean isClassAlive(String name) {
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71 return isClassAlive0(name.replace('.', '/'));
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72 }
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73 private native boolean isClassAlive0(String name);
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74
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75 // G1
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76 public native boolean g1InConcurrentMark();
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77 public native boolean g1IsHumongous(Object o);
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78 public native long g1NumFreeRegions();
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79 public native int g1RegionSize();
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80 public native Object[] parseCommandLine(String commandline, DiagnosticCommand[] args);
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81
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82 // NMT
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83 public native boolean NMTAllocTest();
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84 public native boolean NMTFreeTestMemory();
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85 public native boolean NMTWaitForDataMerge();
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86
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87 // Compiler
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88 public native void deoptimizeAll();
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89 public native boolean isMethodCompiled(Method method);
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90 public native boolean isMethodCompilable(Method method);
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91 public native boolean isMethodQueuedForCompilation(Method method);
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92 public native int deoptimizeMethod(Method method);
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93 public native void makeMethodNotCompilable(Method method);
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94 public native int getMethodCompilationLevel(Method method);
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95 public native boolean setDontInlineMethod(Method method, boolean value);
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96 public native int getCompileQueuesSize();
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97 }