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/code/CompressedReadStream.java

/*
 * Copyright (c) 2000, 2005, 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.code;

import sun.jvm.hotspot.debugger.*;

public class CompressedReadStream extends CompressedStream {
  /** Equivalent to CompressedReadStream(buffer, 0) */
  public CompressedReadStream(Address buffer) {
    this(buffer, 0);
  }

  public CompressedReadStream(Address buffer, int position) {
    super(buffer, position);
  }

  public boolean readBoolean() {
    return (read() != 0);
  }

  public byte readByte() {
    return (byte) read();
  }

  public char readChar() {
    return (char) readInt();
  }

  public short readShort() {
    return (short) readSignedInt();
  }

  public int readSignedInt() {
    return decodeSign(readInt());
  }

  public int readInt() {
    int b0 = read();
    if (b0 < L) {
      return b0;
    } else {
      return readIntMb(b0);
    }
  }


  public float readFloat() {
    return Float.intBitsToFloat(reverseInt(readInt()));
  }

  public double readDouble() {
    int rh = readInt();
    int rl = readInt();
    int h = reverseInt(rh);
    int l = reverseInt(rl);
    return Double.longBitsToDouble((h << 32) | ((long)l & 0x00000000FFFFFFFFL));
  }

  public long readLong() {
    long low = readSignedInt() & 0x00000000FFFFFFFFL;
    long high = readSignedInt();
    return (high << 32) | low;
  }

  //--------------------------------------------------------------------------------
  // Internals only below this point
  //


  // This encoding, called UNSIGNED5, is taken from J2SE Pack200.
  // It assumes that most values have lots of leading zeroes.
  // Very small values, in the range [0..191], code in one byte.
  // Any 32-bit value (including negatives) can be coded, in
  // up to five bytes.  The grammar is:
  //    low_byte  = [0..191]
  //    high_byte = [192..255]
  //    any_byte  = low_byte | high_byte
  //    coding = low_byte
  //           | high_byte low_byte
  //           | high_byte high_byte low_byte
  //           | high_byte high_byte high_byte low_byte
  //           | high_byte high_byte high_byte high_byte any_byte
  // Each high_byte contributes six bits of payload.
  // The encoding is one-to-one (except for integer overflow)
  // and easy to parse and unparse.

  private int readIntMb(int b0) {
    int pos = position - 1;
    int sum = b0;
    // must collect more bytes: b[1]...b[4]
    int lg_H_i = lg_H;
    for (int i = 0; ;) {
      int b_i = read(pos + (++i));
      sum += b_i << lg_H_i; // sum += b[i]*(64**i)
      if (b_i < L || i == MAX_i) {
        setPosition(pos+i+1);
        return sum;
      }
      lg_H_i += lg_H;
    }
  }

  private short read(int index) {
    return (short) buffer.getCIntegerAt(index, 1, true);
  }

  /** Reads an unsigned byte, but returns it as a short */
  private short read() {
    short retval = (short) buffer.getCIntegerAt(position, 1, true);
    ++position;
    return retval;
  }
}

⏎ sun/jvm/hotspot/code/CompressedReadStream.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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