test/lib/sun/hotspot/WhiteBox.java
author iignatyev
Thu, 02 Apr 2015 19:09:06 +0300
changeset 30077 1b49d946a1c8
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child 30078 cecb6ee4437a
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8043225: Make whitebox API functions more stable Summary: Added checks for null parameters where applicable Reviewed-by: dholmes, iignatyev Contributed-by: Kirill Zhaldybin <kirill.zhaldybin@oracle.com>
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/*
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 * Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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package sun.hotspot;
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import java.lang.management.MemoryUsage;
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import java.lang.reflect.Executable;
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import java.util.Arrays;
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import java.util.List;
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import java.util.function.BiFunction;
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import java.util.function.Function;
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import java.util.stream.Stream;
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import java.security.BasicPermission;
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import java.util.Objects;
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import sun.hotspot.parser.DiagnosticCommand;
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public class WhiteBox {
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  @SuppressWarnings("serial")
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  public static class WhiteBoxPermission extends BasicPermission {
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    public WhiteBoxPermission(String s) {
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      super(s);
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    }
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  }
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  private WhiteBox() {}
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  private static final WhiteBox instance = new WhiteBox();
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  private static native void registerNatives();
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  /**
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   * Returns the singleton WhiteBox instance.
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   *
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   * The returned WhiteBox object should be carefully guarded
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   * by the caller, since it can be used to read and write data
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   * at arbitrary memory addresses. It must never be passed to
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   * untrusted code.
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   */
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  public synchronized static WhiteBox getWhiteBox() {
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    SecurityManager sm = System.getSecurityManager();
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    if (sm != null) {
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      sm.checkPermission(new WhiteBoxPermission("getInstance"));
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    }
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    return instance;
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  }
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  static {
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    registerNatives();
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  }
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  // Get the maximum heap size supporting COOPs
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  public native long getCompressedOopsMaxHeapSize();
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  // Arguments
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  public native void printHeapSizes();
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  // Memory
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  private native long getObjectAddress0(Object o);
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  public           long getObjectAddress(Object o) {
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    Objects.requireNonNull(o);
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    return getObjectAddress0(o);
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  }
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  public native int  getHeapOopSize();
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  public native int  getVMPageSize();
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  private native boolean isObjectInOldGen0(Object o);
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  public         boolean isObjectInOldGen(Object o) {
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    Objects.requireNonNull(o);
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    return isObjectInOldGen0(o);
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  }
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  private native long getObjectSize0(Object o);
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  public         long getObjectSize(Object o) {
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    Objects.requireNonNull(o);
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    return getObjectSize0(o);
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  }
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  // Runtime
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  // Make sure class name is in the correct format
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  public boolean isClassAlive(String name) {
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    return isClassAlive0(name.replace('.', '/'));
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  }
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  private native boolean isClassAlive0(String name);
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  private native boolean isMonitorInflated0(Object obj);
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  public         boolean isMonitorInflated(Object obj) {
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    Objects.requireNonNull(obj);
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    return isMonitorInflated0(obj);
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  }
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  public native void forceSafepoint();
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  // JVMTI
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  private native void addToBootstrapClassLoaderSearch0(String segment);
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  public         void addToBootstrapClassLoaderSearch(String segment){
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    Objects.requireNonNull(segment);
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    addToBootstrapClassLoaderSearch0(segment);
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  }
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  private native void addToSystemClassLoaderSearch0(String segment);
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  public         void addToSystemClassLoaderSearch(String segment) {
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    Objects.requireNonNull(segment);
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    addToSystemClassLoaderSearch0(segment);
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  }
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  // G1
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  public native boolean g1InConcurrentMark();
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  private native boolean g1IsHumongous0(Object o);
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  public         boolean g1IsHumongous(Object o) {
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    Objects.requireNonNull(o);
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    return g1IsHumongous0(o);
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  }
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  public native long    g1NumMaxRegions();
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  public native long    g1NumFreeRegions();
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  public native int     g1RegionSize();
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  public native MemoryUsage g1AuxiliaryMemoryUsage();
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  private  native Object[]    parseCommandLine0(String commandline, char delim, DiagnosticCommand[] args);
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  public          Object[]    parseCommandLine(String commandline, char delim, DiagnosticCommand[] args) {
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    Objects.requireNonNull(args);
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    return parseCommandLine0(commandline, delim, args);
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  }
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  // NMT
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  public native long NMTMalloc(long size);
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  public native void NMTFree(long mem);
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  public native long NMTReserveMemory(long size);
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  public native void NMTCommitMemory(long addr, long size);
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  public native void NMTUncommitMemory(long addr, long size);
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  public native void NMTReleaseMemory(long addr, long size);
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  public native long NMTMallocWithPseudoStack(long size, int index);
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  public native boolean NMTChangeTrackingLevel();
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  public native int NMTGetHashSize();
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  // Compiler
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  public native int     deoptimizeFrames(boolean makeNotEntrant);
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  public native void    deoptimizeAll();
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  public        boolean isMethodCompiled(Executable method) {
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    return isMethodCompiled(method, false /*not osr*/);
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  }
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  private native boolean isMethodCompiled0(Executable method, boolean isOsr);
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  public         boolean isMethodCompiled(Executable method, boolean isOsr){
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    Objects.requireNonNull(method);
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    return isMethodCompiled0(method, isOsr);
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  }
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  public        boolean isMethodCompilable(Executable method) {
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    return isMethodCompilable(method, -1 /*any*/);
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  }
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  public        boolean isMethodCompilable(Executable method, int compLevel) {
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    return isMethodCompilable(method, compLevel, false /*not osr*/);
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  }
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  private native boolean isMethodCompilable0(Executable method, int compLevel, boolean isOsr);
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  public         boolean isMethodCompilable(Executable method, int compLevel, boolean isOsr) {
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    Objects.requireNonNull(method);
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    return isMethodCompilable0(method, compLevel, isOsr);
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  }
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  private native boolean isMethodQueuedForCompilation0(Executable method);
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  public         boolean isMethodQueuedForCompilation(Executable method) {
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    Objects.requireNonNull(method);
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    return isMethodQueuedForCompilation0(method);
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  }
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  public        int     deoptimizeMethod(Executable method) {
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    return deoptimizeMethod(method, false /*not osr*/);
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  }
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  private native int     deoptimizeMethod0(Executable method, boolean isOsr);
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  public         int     deoptimizeMethod(Executable method, boolean isOsr) {
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    Objects.requireNonNull(method);
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    return deoptimizeMethod0(method, isOsr);
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  }
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  public        void    makeMethodNotCompilable(Executable method) {
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    makeMethodNotCompilable(method, -1 /*any*/);
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  }
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  public        void    makeMethodNotCompilable(Executable method, int compLevel) {
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    makeMethodNotCompilable(method, compLevel, false /*not osr*/);
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  }
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  private native void    makeMethodNotCompilable0(Executable method, int compLevel, boolean isOsr);
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  public         void    makeMethodNotCompilable(Executable method, int compLevel, boolean isOsr) {
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    Objects.requireNonNull(method);
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    makeMethodNotCompilable0(method, compLevel, isOsr);
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  }
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  public        int     getMethodCompilationLevel(Executable method) {
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    return getMethodCompilationLevel(method, false /*not ost*/);
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  }
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  private native int     getMethodCompilationLevel0(Executable method, boolean isOsr);
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  public         int     getMethodCompilationLevel(Executable method, boolean isOsr) {
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    Objects.requireNonNull(method);
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    return getMethodCompilationLevel0(method, isOsr);
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  }
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  private native boolean testSetDontInlineMethod0(Executable method, boolean value);
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  public         boolean testSetDontInlineMethod(Executable method, boolean value) {
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    Objects.requireNonNull(method);
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    return testSetDontInlineMethod0(method, value);
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  }
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  public        int     getCompileQueuesSize() {
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    return getCompileQueueSize(-1 /*any*/);
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  }
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  public native int     getCompileQueueSize(int compLevel);
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  private native boolean testSetForceInlineMethod0(Executable method, boolean value);
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  public         boolean testSetForceInlineMethod(Executable method, boolean value) {
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    Objects.requireNonNull(method);
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    return testSetForceInlineMethod0(method, value);
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  }
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  public        boolean enqueueMethodForCompilation(Executable method, int compLevel) {
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    return enqueueMethodForCompilation(method, compLevel, -1 /*InvocationEntryBci*/);
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  }
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  private native boolean enqueueMethodForCompilation0(Executable method, int compLevel, int entry_bci);
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  public  boolean enqueueMethodForCompilation(Executable method, int compLevel, int entry_bci) {
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    Objects.requireNonNull(method);
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    return enqueueMethodForCompilation0(method, compLevel, entry_bci);
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  }
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  private native void    clearMethodState0(Executable method);
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  public         void    clearMethodState(Executable method) {
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    Objects.requireNonNull(method);
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    clearMethodState0(method);
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  }
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  public native void    lockCompilation();
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  public native void    unlockCompilation();
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  private native int     getMethodEntryBci0(Executable method);
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  public         int     getMethodEntryBci(Executable method) {
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    Objects.requireNonNull(method);
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    return getMethodEntryBci0(method);
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  }
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  private native Object[] getNMethod0(Executable method, boolean isOsr);
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  public         Object[] getNMethod(Executable method, boolean isOsr) {
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    Objects.requireNonNull(method);
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    return getNMethod0(method, isOsr);
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  }
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  public native long    allocateCodeBlob(int size, int type);
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  public        long    allocateCodeBlob(long size, int type) {
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      int intSize = (int) size;
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      if ((long) intSize != size || size < 0) {
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          throw new IllegalArgumentException(
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                "size argument has illegal value " + size);
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      }
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      return allocateCodeBlob( intSize, type);
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  }
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  public native void    freeCodeBlob(long addr);
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  public        void    forceNMethodSweep() {
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    try {
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        forceNMethodSweep0().join();
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    } catch (InterruptedException e) {
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        Thread.currentThread().interrupt();
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    }
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  }
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  public native Thread  forceNMethodSweep0();
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  public native Object[] getCodeHeapEntries(int type);
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  public native int     getCompilationActivityMode();
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  public native Object[] getCodeBlob(long addr);
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  // Intered strings
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  public native boolean isInStringTable(String str);
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  // Memory
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  public native void readReservedMemory();
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  public native long allocateMetaspace(ClassLoader classLoader, long size);
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  public native void freeMetaspace(ClassLoader classLoader, long addr, long size);
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  public native long incMetaspaceCapacityUntilGC(long increment);
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  public native long metaspaceCapacityUntilGC();
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  // Force Young GC
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  public native void youngGC();
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  // Force Full GC
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  public native void fullGC();
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  // Method tries to start concurrent mark cycle.
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  // It returns false if CM Thread is always in concurrent cycle.
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  public native boolean g1StartConcMarkCycle();
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  // Tests on ReservedSpace/VirtualSpace classes
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  public native int stressVirtualSpaceResize(long reservedSpaceSize, long magnitude, long iterations);
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  public native void runMemoryUnitTests();
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  public native void readFromNoaccessArea();
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  public native long getThreadStackSize();
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  public native long getThreadRemainingStackSize();
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  // CPU features
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  public native String getCPUFeatures();
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  // Native extensions
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  public native long getHeapUsageForContext(int context);
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  public native long getHeapRegionCountForContext(int context);
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  private native int getContextForObject0(Object obj);
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  public         int getContextForObject(Object obj) {
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    Objects.requireNonNull(obj);
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    return getContextForObject0(obj);
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  }
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  public native void printRegionInfo(int context);
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  // VM flags
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  public native boolean isConstantVMFlag(String name);
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  public native boolean isLockedVMFlag(String name);
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  public native void    setBooleanVMFlag(String name, boolean value);
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  public native void    setIntxVMFlag(String name, long value);
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  public native void    setUintxVMFlag(String name, long value);
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  public native void    setUint64VMFlag(String name, long value);
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  public native void    setSizeTVMFlag(String name, long value);
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  public native void    setStringVMFlag(String name, String value);
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  public native void    setDoubleVMFlag(String name, double value);
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  public native Boolean getBooleanVMFlag(String name);
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  public native Long    getIntxVMFlag(String name);
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  public native Long    getUintxVMFlag(String name);
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  public native Long    getUint64VMFlag(String name);
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  public native Long    getSizeTVMFlag(String name);
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  public native String  getStringVMFlag(String name);
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  public native Double  getDoubleVMFlag(String name);
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  private final List<Function<String,Object>> flagsGetters = Arrays.asList(
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    this::getBooleanVMFlag, this::getIntxVMFlag, this::getUintxVMFlag,
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    this::getUint64VMFlag, this::getSizeTVMFlag, this::getStringVMFlag,
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    this::getDoubleVMFlag);
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  public Object getVMFlag(String name) {
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    return flagsGetters.stream()
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                       .map(f -> f.apply(name))
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                       .filter(x -> x != null)
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                       .findAny()
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                       .orElse(null);
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  }
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  public native int getOffsetForName0(String name);
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  public int getOffsetForName(String name) throws Exception {
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    int offset = getOffsetForName0(name);
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    if (offset == -1) {
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      throw new RuntimeException(name + " not found");
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    }
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    return offset;
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  }
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  public native Boolean getMethodBooleanOption(Executable method, String name);
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  public native Long    getMethodIntxOption(Executable method, String name);
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  public native Long    getMethodUintxOption(Executable method, String name);
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  public native Double  getMethodDoubleOption(Executable method, String name);
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  public native String  getMethodStringOption(Executable method, String name);
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  private final List<BiFunction<Executable,String,Object>> methodOptionGetters
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      = Arrays.asList(this::getMethodBooleanOption, this::getMethodIntxOption,
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          this::getMethodUintxOption, this::getMethodDoubleOption,
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          this::getMethodStringOption);
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  public Object getMethodOption(Executable method, String name) {
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    return methodOptionGetters.stream()
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                              .map(f -> f.apply(method, name))
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                              .filter(x -> x != null)
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                              .findAny()
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                              .orElse(null);
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  }
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  // Safepoint Checking
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  public native void assertMatchingSafepointCalls(boolean mutexSafepointValue, boolean attemptedNoSafepointValue);
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}