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/gc/z/ZBarrier.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;

class ZBarrier {
    private static boolean is_weak_good_or_null_fast_path(Address addr) {
        return ZAddress.is_weak_good_or_null(addr);
    }

    private static Address weak_load_barrier_on_oop_slow_path(Address addr) {
        return ZAddress.is_weak_good(addr) ? ZAddress.good(addr) : relocate_or_remap(addr);
    }

    private static boolean during_relocate() {
        return ZGlobals.ZGlobalPhase() == ZGlobals.ZPhaseRelocate;
    }

    private static Address relocate(Address addr) {
        ZHeap heap = zheap();
        if (heap.is_relocating(addr)) {
            // Forward
            return heap.relocate_object(addr);
        }

        // Remap
        return ZAddress.good(addr);
    }

    private static ZHeap zheap() {
        ZCollectedHeap zCollectedHeap = (ZCollectedHeap)VM.getVM().getUniverse().heap();
        return zCollectedHeap.heap();
    }

    private static Address remap(Address addr) {
        ZHeap heap = zheap();
        if (heap.is_relocating(addr)) {
            // Forward
            return heap.forward_object(addr);
        }

        // Remap
        return ZAddress.good(addr);
    }

    private static Address relocate_or_remap(Address addr) {
        return during_relocate() ? relocate(addr) : remap(addr);
    }

    static Address weak_barrier(Address o) {
        // Fast path
        if (is_weak_good_or_null_fast_path(o)) {
            // Return the good address instead of the weak good address
            // to ensure that the currently active heap view is used.
            return ZAddress.good_or_null(o);
        }

        // Slow path
        return weak_load_barrier_on_oop_slow_path(o);
    }
}

⏎ sun/jvm/hotspot/gc/z/ZBarrier.java

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