/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

package sun.hotspot;

import java.lang.reflect.Method;

import java.security.BasicPermission;

import sun.hotspot.parser.DiagnosticCommand;

public class WhiteBox {

  @SuppressWarnings("serial")

  public static class WhiteBoxPermission extends BasicPermission {

    public WhiteBoxPermission(String s) {

      super(s);

    }

  }

  private WhiteBox() {}

  private static final WhiteBox instance = new WhiteBox();

  private static native void registerNatives();

  /**

   * Returns the singleton WhiteBox instance.

   *

   * The returned WhiteBox object should be carefully guarded

   * by the caller, since it can be used to read and write data

   * at arbitrary memory addresses. It must never be passed to

   * untrusted code.

   */

  public synchronized static WhiteBox getWhiteBox() {

    SecurityManager sm = System.getSecurityManager();

    if (sm != null) {

      sm.checkPermission(new WhiteBoxPermission("getInstance"));

    }

    return instance;

  }

  static {

    registerNatives();

  }

  // Memory

  public native long getObjectAddress(Object o);

  public native int  getHeapOopSize();

  // Runtime

  // Make sure class name is in the correct format

  public boolean isClassAlive(String name) {

    return isClassAlive0(name.replace('.', '/'));

  }

  private native boolean isClassAlive0(String name);

  // G1

  public native boolean g1InConcurrentMark();

  public native boolean g1IsHumongous(Object o);

  public native long    g1NumFreeRegions();

  public native int     g1RegionSize();

  public native Object[]    parseCommandLine(String commandline, DiagnosticCommand[] args);

  // NMT

  public native boolean NMTAllocTest();

  public native boolean NMTFreeTestMemory();

  public native boolean NMTWaitForDataMerge();

  // Compiler

  public native void    deoptimizeAll();

  public native boolean isMethodCompiled(Method method);

  public native boolean isMethodCompilable(Method method);

  public native boolean isMethodQueuedForCompilation(Method method);

  public native int     deoptimizeMethod(Method method);

  public native void    makeMethodNotCompilable(Method method);

  public native int     getMethodCompilationLevel(Method method);

  public native boolean setDontInlineMethod(Method method, boolean value);

  public native int     getCompileQueuesSize();

  //Intered strings

  public native boolean isInStringTable(String str);

  // force Full GC

  public native void fullGC();

}