rev 6447 : imported patch hsx-whitebox-stack-v4.3.diff

   1 /*
   2  * Copyright (c) 2012, 2014, 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 
  27 import java.lang.reflect.Executable;
  28 import java.security.BasicPermission;
  29 import sun.hotspot.parser.DiagnosticCommand;
  30 
  31 public class WhiteBox {
  32 
  33   @SuppressWarnings("serial")
  34   public static class WhiteBoxPermission extends BasicPermission {
  35     public WhiteBoxPermission(String s) {
  36       super(s);
  37     }
  38   }
  39 
  40   private WhiteBox() {}
  41   private static final WhiteBox instance = new WhiteBox();
  42   private static native void registerNatives();
  43 
  44   /**
  45    * Returns the singleton WhiteBox instance.
  46    *
  47    * The returned WhiteBox object should be carefully guarded
  48    * by the caller, since it can be used to read and write data
  49    * at arbitrary memory addresses. It must never be passed to
  50    * untrusted code.
  51    */
  52   public synchronized static WhiteBox getWhiteBox() {
  53     SecurityManager sm = System.getSecurityManager();
  54     if (sm != null) {
  55       sm.checkPermission(new WhiteBoxPermission("getInstance"));
  56     }
  57     return instance;
  58   }
  59 
  60   static {
  61     registerNatives();
  62   }
  63 
  64   // Get the maximum heap size supporting COOPs
  65   public native long getCompressedOopsMaxHeapSize();
  66   // Arguments
  67   public native void printHeapSizes();
  68 
  69   // Memory
  70   public native long getObjectAddress(Object o);
  71   public native int  getHeapOopSize();
  72 
  73   // Runtime
  74   // Make sure class name is in the correct format
  75   public boolean isClassAlive(String name) {
  76     return isClassAlive0(name.replace('.', '/'));
  77   }
  78   private native boolean isClassAlive0(String name);
  79 
  80   // G1
  81   public native boolean g1InConcurrentMark();
  82   public native boolean g1IsHumongous(Object o);
  83   public native long    g1NumFreeRegions();
  84   public native int     g1RegionSize();
  85   public native Object[]    parseCommandLine(String commandline, DiagnosticCommand[] args);
  86 
  87   // NMT
  88   public native long NMTMalloc(long size);
  89   public native void NMTFree(long mem);
  90   public native long NMTReserveMemory(long size);
  91   public native void NMTCommitMemory(long addr, long size);
  92   public native void NMTUncommitMemory(long addr, long size);
  93   public native void NMTReleaseMemory(long addr, long size);
  94   public native boolean NMTWaitForDataMerge();
  95   public native boolean NMTIsDetailSupported();
  96 
  97   // Compiler
  98   public native void    deoptimizeAll();
  99   public        boolean isMethodCompiled(Executable method) {
 100     return isMethodCompiled(method, false /*not osr*/);
 101   }
 102   public native boolean isMethodCompiled(Executable method, boolean isOsr);
 103   public        boolean isMethodCompilable(Executable method) {
 104     return isMethodCompilable(method, -1 /*any*/);
 105   }
 106   public        boolean isMethodCompilable(Executable method, int compLevel) {
 107     return isMethodCompilable(method, compLevel, false /*not osr*/);
 108   }
 109   public native boolean isMethodCompilable(Executable method, int compLevel, boolean isOsr);
 110   public native boolean isMethodQueuedForCompilation(Executable method);
 111   public        int     deoptimizeMethod(Executable method) {
 112     return deoptimizeMethod(method, false /*not osr*/);
 113   }
 114   public native int     deoptimizeMethod(Executable method, boolean isOsr);
 115   public        void    makeMethodNotCompilable(Executable method) {
 116     makeMethodNotCompilable(method, -1 /*any*/);
 117   }
 118   public        void    makeMethodNotCompilable(Executable method, int compLevel) {
 119     makeMethodNotCompilable(method, compLevel, false /*not osr*/);
 120   }
 121   public native void    makeMethodNotCompilable(Executable method, int compLevel, boolean isOsr);
 122   public        int     getMethodCompilationLevel(Executable method) {
 123     return getMethodCompilationLevel(method, false /*not ost*/);
 124   }
 125   public native int     getMethodCompilationLevel(Executable method, boolean isOsr);
 126   public native boolean testSetDontInlineMethod(Executable method, boolean value);
 127   public        int     getCompileQueuesSize() {
 128     return getCompileQueueSize(-1 /*any*/);
 129   }
 130   public native int     getCompileQueueSize(int compLevel);
 131   public native boolean testSetForceInlineMethod(Executable method, boolean value);
 132   public boolean        enqueueMethodForCompilation(Executable method, int compLevel) {
 133     return enqueueMethodForCompilation(method, compLevel, -1 /*InvocationEntryBci*/);
 134   }
 135   public native boolean enqueueMethodForCompilation(Executable method, int compLevel, int entry_bci);
 136   public native void    clearMethodState(Executable method);
 137   public native int     getMethodEntryBci(Executable method);
 138   public native Object[] getNMethod(Executable method, boolean isOsr);
 139 
 140   // Intered strings
 141   public native boolean isInStringTable(String str);
 142 
 143   // Memory
 144   public native void readReservedMemory();
 145 
 146   // force Full GC
 147   public native void fullGC();
 148 
 149   // Tests on ReservedSpace/VirtualSpace classes
 150   public native int stressVirtualSpaceResize(long reservedSpaceSize, long magnitude, long iterations);
 151   public native void runMemoryUnitTests();
 152   public native void readFromNoaccessArea();


 153 
 154   // CPU features
 155   public native String getCPUFeatures();
 156 
 157 }
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