JDK 11 jdk.hotspot.agent.jmod - Hotspot Agent Module

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.

✍: FYIcenter

sun/jvm/hotspot/gc/z/ZForwardingTable.java

/*
 * Copyright (c) 2018, 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.gc.z;

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

public class ZForwardingTable extends VMObject {
    private static AddressField tableField;
    private static CIntegerField sizeField;

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

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

        tableField = type.getAddressField("_table");
        sizeField = type.getCIntegerField("_size");
    }

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

    Address table() {
        return tableField.getAddress(addr);
    }

    long size() {
        return sizeField.getJLong(addr);
    }

    ZForwardingTableEntry at(ZForwardingTableCursor cursor) {
        return new ZForwardingTableEntry(table().getAddressAt(cursor._value * VM.getVM().getBytesPerLong()));
    }

    ZForwardingTableEntry first(long from_index, ZForwardingTableCursor cursor) {
        long mask = size() - 1;
        long hash = ZHash.uint32_to_uint32(from_index);
        cursor._value = hash & mask;
        return at(cursor);
    }

    ZForwardingTableEntry next(ZForwardingTableCursor cursor) {
        long mask = size() - 1;
        cursor._value = (cursor._value + 1) & mask;
        return at(cursor);
    }

    ZForwardingTableEntry find(long from_index, ZForwardingTableCursor cursor) {
        // Reading entries in the table races with the atomic cas done for
        // insertion into the table. This is safe because each entry is at
        // most updated once (from -1 to something else).
        ZForwardingTableEntry entry = first(from_index, cursor);
        while (!entry.is_empty()) {
            if (entry.from_index() == from_index) {
                // Match found, return matching entry
                return entry;
            }

            entry = next(cursor);
        }

        // Match not found, return empty entry
        return entry;
    }

    ZForwardingTableEntry find(long from_index) {
        ZForwardingTableCursor dummy = new ZForwardingTableCursor();
        return find(from_index, dummy);
    }

    void dump() {
        long s = size();
        long count = 0;
        System.out.println("Dumping ZForwardingTable[" + s + "]:");
        ZForwardingTableCursor cursor = new ZForwardingTableCursor();
        for (long i = 0; i < s; i++) {
            cursor._value = i;
            ZForwardingTableEntry entry = at(cursor);
            if (!entry.is_empty()) {
                long hash = ZHash.uint32_to_uint32(entry.from_index());
                System.out.println(i + " " + count + " " + entry + " hash: " + hash + " masked_hash: " + (hash & (s - 1)));
                count++;
            }
        }
    }
}

sun/jvm/hotspot/gc/z/ZForwardingTable.java

 

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