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 } |
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