JDK 17 jdk.hotspot.agent.jmod is the JMOD file for JDK 17 Hotspot Agent module.

JDK 17 Hotspot Agent module compiled class files are stored in \fyicenter\jdk-17.0.5\jmods\jdk.hotspot.agent.jmod.

JDK 17 Hotspot Agent module compiled class files are also linked and stored in the \fyicenter\jdk-17.0.5\lib\modules JImage file.

JDK 17 Hotspot Agent module source code files are stored in \fyicenter\jdk-17.0.5\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/z/ZForwarding.java

/*
 * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2021, NTT DATA.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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package sun.jvm.hotspot.gc.z;

import java.util.Iterator;

import sun.jvm.hotspot.debugger.Address;
import sun.jvm.hotspot.runtime.VM;
import sun.jvm.hotspot.runtime.VMObject;
import sun.jvm.hotspot.runtime.VMObjectFactory;
import sun.jvm.hotspot.types.CIntegerField;
import sun.jvm.hotspot.types.Type;
import sun.jvm.hotspot.types.TypeDataBase;

public class ZForwarding extends VMObject {
    private static Type type;
    private static long virtualFieldOffset;
    private static long entriesFieldOffset;
    private static CIntegerField objectAlignmentShiftField;
    private static CIntegerField refCountField;

    static {
        VM.registerVMInitializedObserver((o, d) -> initialize(VM.getVM().getTypeDataBase()));
    }

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

        virtualFieldOffset = type.getField("_virtual").getOffset();
        entriesFieldOffset = type.getField("_entries").getOffset();
        objectAlignmentShiftField = type.getCIntegerField("_object_alignment_shift");
        refCountField = type.getCIntegerField("_ref_count");
    }

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

    public static long getSize() {
        return type.getSize();
    }

    private ZVirtualMemory virtual() {
        return VMObjectFactory.newObject(ZVirtualMemory.class, addr.addOffsetTo(virtualFieldOffset));
    }

    private ZAttachedArrayForForwarding entries() {
        return VMObjectFactory.newObject(ZAttachedArrayForForwarding.class, addr.addOffsetTo(entriesFieldOffset));
    }

    public long start() {
        return virtual().start();
    }

    public int objectAlignmentShift() {
        return (int)objectAlignmentShiftField.getValue(addr);
    }

    public boolean retainPage() {
        return refCountField.getValue(addr) > 0;
    }

    private ZForwardingEntry at(long cursor) {
        long offset = ZForwardingEntry.getSize() * cursor;
        Address entryAddress = entries().get(this).getAddress().addOffsetTo(offset);
        return VMObjectFactory.newObject(ZForwardingEntry.class, entryAddress);
    }

    private class ZForwardEntryIterator implements Iterator<ZForwardingEntry> {

        private long cursor;

        private ZForwardingEntry nextEntry;

        public ZForwardEntryIterator(long fromIndex) {
            long mask = entries().length() - 1;
            long hash = ZHash.uint32_to_uint32(fromIndex);
            cursor = hash & mask;
            nextEntry = at(cursor);
        }

        @Override
        public boolean hasNext() {
            return nextEntry.populated();
        }

        @Override
        public ZForwardingEntry next() {
            ZForwardingEntry entry = nextEntry;

            long mask = entries().length() - 1;
            cursor = (cursor + 1) & mask;
            nextEntry = at(cursor);

            return entry;
        }

        public ZForwardingEntry peak() {
            return nextEntry;
        }
    }

    public ZForwardingEntry find(long fromIndex) {
        ZForwardEntryIterator itr = new ZForwardEntryIterator(fromIndex);
        while (itr.hasNext()) {
            ZForwardingEntry entry = itr.next();
            if (entry.fromIndex() == fromIndex) {
                return entry;
            }
        }
        return itr.peak();
    }
}

⏎ sun/jvm/hotspot/gc/z/ZForwarding.java

Or download all of them as a single archive file:

File name: jdk.hotspot.agent-17.0.5-src.zip
File size: 1238587 bytes
Release date: 2022-09-13
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