JDK 11 jdk.jlink.jmod - JLink Tool

JDK 11 jdk.jlink.jmod is the JMOD file for JDK 11 JLink tool, which can be invoked by the "jlink" command.

JDK 11 JLink tool compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.jlink.jmod.

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

JDK 11 JLink tool source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.jlink.

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

✍: FYIcenter

jdk/tools/jlink/internal/BasicImageWriter.java

/*
 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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package jdk.tools.jlink.internal;

import java.nio.ByteOrder;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import jdk.internal.jimage.ImageHeader;
import jdk.internal.jimage.ImageStream;
import jdk.internal.jimage.ImageStringsReader;

public final class BasicImageWriter {
    public static final String MODULES_IMAGE_NAME = "modules";

    private final static int RETRY_LIMIT = 1000;

    private ByteOrder byteOrder;
    private ImageStringsWriter strings;
    private int length;
    private int[] redirect;
    private ImageLocationWriter[] locations;
    private List<ImageLocationWriter> input;
    private ImageStream headerStream;
    private ImageStream redirectStream;
    private ImageStream locationOffsetStream;
    private ImageStream locationStream;
    private ImageStream allIndexStream;

    public BasicImageWriter() {
        this(ByteOrder.nativeOrder());
    }

    public BasicImageWriter(ByteOrder byteOrder) {
        this.byteOrder = Objects.requireNonNull(byteOrder);
        this.input = new ArrayList<>();
        this.strings = new ImageStringsWriter();
        this.headerStream = new ImageStream(byteOrder);
        this.redirectStream = new ImageStream(byteOrder);
        this.locationOffsetStream = new ImageStream(byteOrder);
        this.locationStream = new ImageStream(byteOrder);
        this.allIndexStream = new ImageStream(byteOrder);
    }

    public ByteOrder getByteOrder() {
        return byteOrder;
    }

    public int addString(String string) {
        return strings.add(string);
    }

    public String getString(int offset) {
        return strings.get(offset);
    }

    public void addLocation(String fullname, long contentOffset,
            long compressedSize, long uncompressedSize) {
        ImageLocationWriter location =
                ImageLocationWriter.newLocation(fullname, strings,
                        contentOffset, compressedSize, uncompressedSize);
        input.add(location);
        length++;
    }

    ImageLocationWriter[] getLocations() {
        return locations;
    }

    int getLocationsCount() {
        return input.size();
    }

    private void generatePerfectHash() {
        PerfectHashBuilder<ImageLocationWriter> builder =
            new PerfectHashBuilder<>(
                        PerfectHashBuilder.Entry.class,
                        PerfectHashBuilder.Bucket.class);

        input.forEach((location) -> {
            builder.put(location.getFullName(), location);
        });

        builder.generate();

        length = builder.getCount();
        redirect = builder.getRedirect();
        PerfectHashBuilder.Entry<ImageLocationWriter>[] order = builder.getOrder();
        locations = new ImageLocationWriter[length];

        for (int i = 0; i < length; i++) {
            locations[i] = order[i].getValue();
        }
    }

    private void prepareStringBytes() {
        strings.getStream().align(2);
    }

    private void prepareRedirectBytes() {
        for (int i = 0; i < length; i++) {
            redirectStream.putInt(redirect[i]);
        }
    }

    private void prepareLocationBytes() {
        // Reserve location offset zero for empty locations
        locationStream.put(ImageLocationWriter.ATTRIBUTE_END << 3);

        for (int i = 0; i < length; i++) {
            ImageLocationWriter location = locations[i];

            if (location != null) {
                location.writeTo(locationStream);
            }
        }

        locationStream.align(2);
    }

    private void prepareOffsetBytes() {
        for (int i = 0; i < length; i++) {
            ImageLocationWriter location = locations[i];
            int offset = location != null ? location.getLocationOffset() : 0;
            locationOffsetStream.putInt(offset);
        }
    }

    private void prepareHeaderBytes() {
        ImageHeader header = new ImageHeader(input.size(), length,
                locationStream.getSize(), strings.getSize());
        header.writeTo(headerStream);
    }

    private void prepareTableBytes() {
        allIndexStream.put(headerStream);
        allIndexStream.put(redirectStream);
        allIndexStream.put(locationOffsetStream);
        allIndexStream.put(locationStream);
        allIndexStream.put(strings.getStream());
    }

    public byte[] getBytes() {
        if (allIndexStream.getSize() == 0) {
            generatePerfectHash();
            prepareStringBytes();
            prepareRedirectBytes();
            prepareLocationBytes();
            prepareOffsetBytes();
            prepareHeaderBytes();
            prepareTableBytes();
        }

        return allIndexStream.toArray();
    }

    ImageLocationWriter find(String key) {
        int index = redirect[ImageStringsReader.hashCode(key) % length];

        if (index < 0) {
            index = -index - 1;
        } else {
            index = ImageStringsReader.hashCode(key, index) % length;
        }

        return locations[index];
    }
}

jdk/tools/jlink/internal/BasicImageWriter.java

 

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