JDK 11 jdk.hotspot.agent.jmod is the JMOD file for JDK 11 Hotspot Agent module.

JDK 11 Hotspot Agent module compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.hotspot.agent.jmod.

JDK 11 Hotspot Agent module compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.

JDK 11 Hotspot Agent module source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.hotspot.agent.

You can click and view the content of each source code file in the list below.

⏎ sun/jvm/hotspot/utilities/RobustOopDeterminator.java

/*
 * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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package sun.jvm.hotspot.utilities;

import java.util.*;
import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.memory.*;
import sun.jvm.hotspot.oops.Metadata;
import sun.jvm.hotspot.oops.Klass;
import sun.jvm.hotspot.runtime.*;
import sun.jvm.hotspot.types.*;

/** This class determines to the best of its ability, and in a
    reasonably robust fashion, whether a given pointer is an intact
    oop or not. It does this by checking the integrity of the
    metaclass hierarchy. This is only intended for use in the
    debugging system. It may provide more resilience to unexpected VM
    states than the ObjectHeap code. */

public class RobustOopDeterminator {
  private static AddressField klassField;

  static {
    VM.registerVMInitializedObserver(new Observer() {
        public void update(Observable o, Object data) {
          initialize(VM.getVM().getTypeDataBase());
        }
      });
  }

  private static void initialize(TypeDataBase db) {
    Type type = db.lookupType("oopDesc");

    if (VM.getVM().isCompressedKlassPointersEnabled()) {
      klassField = type.getAddressField("_metadata._compressed_klass");
    } else {
      klassField = type.getAddressField("_metadata._klass");
    }
  }

  public static boolean oopLooksValid(OopHandle oop) {
    if (oop == null) {
      return false;
    }
    if (!VM.getVM().getUniverse().isIn(oop)) {
      return false;
    }
    try {
      // Try to instantiate the Klass
      if (VM.getVM().isCompressedKlassPointersEnabled()) {
        Metadata.instantiateWrapperFor(oop.getCompKlassAddressAt(klassField.getOffset()));
      } else {
        Metadata.instantiateWrapperFor(klassField.getValue(oop));
      }
          return true;
        }
    catch (AddressException e) {
      return false;
    }
  }
}

⏎ sun/jvm/hotspot/utilities/RobustOopDeterminator.java

Or download all of them as a single archive file:

File name: jdk.hotspot.agent-11.0.1-src.zip
File size: 1243786 bytes
Release date: 2018-11-04
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