JDK 11 jdk.internal.jvmstat.jmod - Internal JVM Stat Module

JDK 11 jdk.internal.JVM Stat.jmod is the JMOD file for JDK 11 Internal Jvmstat module.

JDK 11 Internal JVM Stat module compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.internal.jvmstat.jmod.

JDK 11 Internal JVM Stat module compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.

JDK 11 Internal JVM Stat module source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.internal.jvmstat.

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

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sun/jvmstat/perfdata/monitor/protocol/local/PerfDataBuffer.java

/*
 * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */

package sun.jvmstat.perfdata.monitor.protocol.local;

import jdk.internal.perf.Perf;
import sun.jvmstat.monitor.*;
import sun.jvmstat.perfdata.monitor.*;
import java.util.*;
import java.io.*;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.lang.reflect.Constructor;
import java.security.AccessController;

/**
 * The concrete PerfDataBuffer implementation for the <em>local:</em>
 * protocol for the HotSpot PerfData monitoring implementation.
 * <p>
 * This class is responsible for acquiring access to the shared memory
 * instrumentation buffer for the target HotSpot Java Virtual Machine.
 *
 * @author Brian Doherty
 * @since 1.5
 */
// Suppreess unchecked conversion warning at line 34.
//@SuppressWarnings("unchecked")
public class PerfDataBuffer extends AbstractPerfDataBuffer {
    private static final Perf perf = AccessController.doPrivileged(new Perf.GetPerfAction());

    /**
     * Create a PerfDataBuffer instance for accessing the specified
     * instrumentation buffer.
     *
     * @param vmid the <em>local:</em> URI specifying the target JVM.
     *
     * @throws MonitorException
     */
    public PerfDataBuffer(VmIdentifier vmid) throws MonitorException {
        try {
            // Try 1.4.2 and later first
            ByteBuffer bb = perf.attach(vmid.getLocalVmId(), vmid.getMode());
            createPerfDataBuffer(bb, vmid.getLocalVmId());

        } catch (IllegalArgumentException e) {
            // now try 1.4.1 by attempting to directly map the files.
            try {
                String filename = PerfDataFile.getTempDirectory()
                                  + PerfDataFile.dirNamePrefix
                                  + Integer.toString(vmid.getLocalVmId());

                File f = new File(filename);

                FileChannel fc = new RandomAccessFile(f, "r").getChannel();
                ByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0L,
                                       (int)fc.size());
                fc.close();
                createPerfDataBuffer(bb, vmid.getLocalVmId());

            } catch (FileNotFoundException e2) {
                // re-throw the exception from the 1.4.2 attach method
                throw new MonitorException(vmid.getLocalVmId() + " not found",
                                           e);
            } catch (IOException e2) {
                throw new MonitorException("Could not map 1.4.1 file for "
                                           + vmid.getLocalVmId(), e2);
            }
        } catch (IOException e) {
            throw new MonitorException("Could not attach to "
                                       + vmid.getLocalVmId(), e);
        }
    }
}

sun/jvmstat/perfdata/monitor/protocol/local/PerfDataBuffer.java

 

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