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/gc/g1/HeapRegionType.java

/*
 * Copyright (c) 2017, 2018, 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.gc.g1;

import java.util.Observable;
import java.util.Observer;
import sun.jvm.hotspot.debugger.Address;
import sun.jvm.hotspot.runtime.VM;
import sun.jvm.hotspot.runtime.VMObject;
import sun.jvm.hotspot.types.CIntegerField;
import sun.jvm.hotspot.types.Type;
import sun.jvm.hotspot.types.TypeDataBase;

// Mirror class for HeapRegionType. Currently we don't actually include
// any of its fields but only iterate over it.

public class HeapRegionType extends VMObject {

    private static int freeTag;
    private static int youngMask;
    private static int edenTag;
    private static int survTag;
    private static int humongousMask;
    private static int startsHumongousTag;
    private static int continuesHumongousTag;
    private static int pinnedMask;
    private static int archiveMask;
    private static int oldMask;
    private static CIntegerField tagField;
    private int tag;

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

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

        tagField = type.getCIntegerField("_tag");

        freeTag = db.lookupIntConstant("HeapRegionType::FreeTag");
        youngMask = db.lookupIntConstant("HeapRegionType::YoungMask");
        edenTag = db.lookupIntConstant("HeapRegionType::EdenTag");
        survTag = db.lookupIntConstant("HeapRegionType::SurvTag");
        startsHumongousTag = db.lookupIntConstant("HeapRegionType::StartsHumongousTag");
        continuesHumongousTag = db.lookupIntConstant("HeapRegionType::ContinuesHumongousTag");
        archiveMask = db.lookupIntConstant("HeapRegionType::ArchiveMask");
        humongousMask = db.lookupIntConstant("HeapRegionType::HumongousMask");
        pinnedMask = db.lookupIntConstant("HeapRegionType::PinnedMask");
        oldMask = db.lookupIntConstant("HeapRegionType::OldMask");
    }

    public boolean isFree() {
        return tagField.getValue(addr) == freeTag;
    }

    public boolean isEden() {
        return tagField.getValue(addr) == edenTag;
    }

    public boolean isSurvivor() {
        return tagField.getValue(addr) == survTag;
    }

    public boolean isYoung() {
        return (tagField.getValue(addr) & youngMask) != 0;
    }

    public boolean isHumongous() {
        return (tagField.getValue(addr) & humongousMask) != 0;
    }

    public boolean isStartsHumongous() {
        return tagField.getValue(addr) == startsHumongousTag;
    }

    public boolean isContinuesHumongous() {
        return tagField.getValue(addr) == continuesHumongousTag;
    }

    public boolean isArchive() {
        return (tagField.getValue(addr) & archiveMask) != 0;
    }

    public boolean isPinned() {
        return (tagField.getValue(addr) & pinnedMask) != 0;
    }

    public boolean isOld() {
        return (tagField.getValue(addr) & oldMask) != 0;
    }

    public HeapRegionType(Address addr) {
        super(addr);
    }

    public String typeAnnotation() {
        if (isFree()) {
            return "Free";
        }
        if (isEden()) {
            return "Eden";
        }
        if (isSurvivor()) {
            return "Survivor";
        }
        if (isStartsHumongous()) {
            return "StartsHumongous";
        }
        if (isContinuesHumongous()) {
            return "ContinuesHumongous";
        }
        if (isArchive()) {
            return "Archive";
        }
        if (isPinned()) {
            return "Pinned";
        }
        if (isOld()) {
            return "Old";
        }
        return "Unknown Region Type";
    }
}

⏎ sun/jvm/hotspot/gc/g1/HeapRegionType.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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