JDK 11 jdk.jdi.jmod is the JMOD file for JDK 11 JDI (Java Debug Interface) tool.

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

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

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

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

⏎ com/sun/tools/jdi/JNITypeParser.java

/*
 * Copyright (c) 1998, 2017, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */

package com.sun.tools.jdi;

import java.util.ArrayList;
import java.util.List;

public class JNITypeParser {

    static final char SIGNATURE_ENDCLASS = ';';
    static final char SIGNATURE_FUNC = '(';
    static final char SIGNATURE_ENDFUNC = ')';

    private String signature;
    private List<String> typeNameList;
    private List<String> signatureList;
    private int currentIndex;

    JNITypeParser(String signature) {
        this.signature = signature;
    }

    static String typeNameToSignature(String signature) {
        StringBuilder sb = new StringBuilder();
        int firstIndex = signature.indexOf('[');
        int index = firstIndex;
        while (index != -1) {
            sb.append('[');
            index = signature.indexOf('[', index + 1);
        }

        if (firstIndex != -1) {
            signature = signature.substring(0, firstIndex);
        }

        if (signature.equals("boolean")) {
            sb.append('Z');
        } else if (signature.equals("byte")) {
            sb.append('B');
        } else if (signature.equals("char")) {
            sb.append('C');
        } else if (signature.equals("short")) {
            sb.append('S');
        } else if (signature.equals("int")) {
            sb.append('I');
        } else if (signature.equals("long")) {
            sb.append('J');
        } else if (signature.equals("float")) {
            sb.append('F');
        } else if (signature.equals("double")) {
            sb.append('D');
        } else {
            sb.append('L');
            sb.append(signature.replace('.', '/'));
            sb.append(';');
        }

        return sb.toString();
    }

    String typeName() {
        return typeNameList().get(typeNameList().size()-1);
    }

    List<String> argumentTypeNames() {
        return typeNameList().subList(0, typeNameList().size() - 1);
    }

    String signature() {
        return signatureList().get(signatureList().size()-1);
    }

    List<String> argumentSignatures() {
        return signatureList().subList(0, signatureList().size() - 1);
    }

    int dimensionCount() {
        int count = 0;
        String signature = signature();
        while (signature.charAt(count) == '[') {
            count++;
        }
        return count;
    }

    String componentSignature(int level) {
        return signature().substring(level);
    }

    private synchronized List<String> signatureList() {
        if (signatureList == null) {
            signatureList = new ArrayList<>(10);
            String elem;

            currentIndex = 0;

            while(currentIndex < signature.length()) {
                elem = nextSignature();
                signatureList.add(elem);
            }
            if (signatureList.size() == 0) {
                throw new IllegalArgumentException("Invalid JNI signature '" +
                                                   signature + "'");
            }
        }
        return signatureList;
    }

    private synchronized List<String> typeNameList() {
        if (typeNameList == null) {
            typeNameList = new ArrayList<>(10);
            String elem;

            currentIndex = 0;

            while(currentIndex < signature.length()) {
                elem = nextTypeName();
                typeNameList.add(elem);
            }
            if (typeNameList.size() == 0) {
                throw new IllegalArgumentException("Invalid JNI signature '" +
                                                   signature + "'");
            }
        }
        return typeNameList;
    }

    private String nextSignature() {
        char key = signature.charAt(currentIndex++);

        switch(key) {
            case (JDWP.Tag.ARRAY):
                return  key + nextSignature();

            case (JDWP.Tag.OBJECT):
                int endClass = signature.indexOf(SIGNATURE_ENDCLASS,
                                                 currentIndex);
                String retVal = signature.substring(currentIndex - 1,
                                                    endClass + 1);
                currentIndex = endClass + 1;
                return retVal;

            case (JDWP.Tag.VOID):
            case (JDWP.Tag.BOOLEAN):
            case (JDWP.Tag.BYTE):
            case (JDWP.Tag.CHAR):
            case (JDWP.Tag.SHORT):
            case (JDWP.Tag.INT):
            case (JDWP.Tag.LONG):
            case (JDWP.Tag.FLOAT):
            case (JDWP.Tag.DOUBLE):
                return String.valueOf(key);

            case SIGNATURE_ENDFUNC:
            case SIGNATURE_FUNC:
                return nextSignature();

            default:
                throw new IllegalArgumentException(
                    "Invalid JNI signature character '" + key + "'");

        }
    }

    private String nextTypeName() {
        char key = signature.charAt(currentIndex++);

        switch(key) {
            case (JDWP.Tag.ARRAY):
                return  nextTypeName() + "[]";

            case (JDWP.Tag.BYTE):
                return "byte";

            case (JDWP.Tag.CHAR):
                return "char";

            case (JDWP.Tag.OBJECT):
                int endClass = signature.indexOf(SIGNATURE_ENDCLASS,
                                                 currentIndex);
                String retVal = signature.substring(currentIndex,
                                                    endClass);
                retVal = retVal.replace('/','.');
                currentIndex = endClass + 1;
                return retVal;

            case (JDWP.Tag.FLOAT):
                return "float";

            case (JDWP.Tag.DOUBLE):
                return "double";

            case (JDWP.Tag.INT):
                return "int";

            case (JDWP.Tag.LONG):
                return "long";

            case (JDWP.Tag.SHORT):
                return "short";

            case (JDWP.Tag.VOID):
                return "void";

            case (JDWP.Tag.BOOLEAN):
                return "boolean";

            case SIGNATURE_ENDFUNC:
            case SIGNATURE_FUNC:
                return nextTypeName();

            default:
                throw new IllegalArgumentException(
                    "Invalid JNI signature character '" + key + "'");
        }
    }
}

⏎ com/sun/tools/jdi/JNITypeParser.java

Or download all of them as a single archive file:

File name: jdk.jdi-11.0.1-src.zip
File size: 464844 bytes
Release date: 2018-11-04
Download 

⇒ JDK 11 jdk.jdwp.agent.jmod - JDWP Agent Module

⇐ JDK 11 jdk.jdeps.jmod - JDeps Tool

⇑ Download and Use JDK 11

⇑⇑ FAQ for JDK (Java Development Kit)