Examples with ObjectReference org.vmmagic.unboxed.ObjectReference used on opensource projects

Example 46 with ObjectReference

use of org.vmmagic.unboxed.ObjectReference in project JikesRVM by JikesRVM.

the class ScanThread method checkReference.

/**
 * Check that a reference encountered during scanning is valid.  If
 * the reference is invalid, dump stack and die.
 *
 * @param refaddr The address of the reference in question.
 */
private static void checkReference(Address refaddr) {
    ObjectReference ref = refaddr.loadObjectReference();
    if (!MemoryManager.validRef(ref)) {
        Log.writeln();
        Log.writeln("Invalid ref reported while scanning stack");
        Log.write(refaddr);
        Log.write(":");
        Log.flush();
        MemoryManager.dumpRef(ref);
        Log.writeln();
        Log.writeln("Dumping stack:");
        RVMThread.dumpStack();
        VM.sysFail("\n\nScanStack: Detected bad GC map; exiting RVM with fatal error");
    }
}

Example 47 with ObjectReference

use of org.vmmagic.unboxed.ObjectReference in project JikesRVM by JikesRVM.

the class FinalizableProcessor method scan.

/**
 * {@inheritDoc} Calls ReferenceProcessor's
 * processReference method for each reference and builds a new
 * list of those references still active.
 * <p>
 * Depending on the value of <code>nursery</code>, we will either
 * scan all references, or just those created since the last scan.
 * <p>
 * TODO parallelise this code
 *
 * @param nursery Scan only the newly created references
 */
@Override
@UninterruptibleNoWarn
public void scan(TraceLocal trace, boolean nursery) {
    int toIndex = nursery ? nurseryIndex : 0;
    for (int fromIndex = toIndex; fromIndex < maxIndex; fromIndex++) {
        ObjectReference ref = table.get(fromIndex).toObjectReference();
        /* Determine liveness (and forward if necessary) */
        if (trace.isLive(ref)) {
            table.set(toIndex++, trace.getForwardedFinalizable(ref).toAddress());
            continue;
        }
        /* Make ready for finalize */
        ref = trace.retainForFinalize(ref);
        /* Add to object table */
        Offset offset = Word.fromIntZeroExtend(lastReadyIndex).lsh(LOG_BYTES_IN_ADDRESS).toOffset();
        Selected.Plan.get().storeObjectReference(Magic.objectAsAddress(readyForFinalize).plus(offset), ref);
        lastReadyIndex = (lastReadyIndex + 1) % readyForFinalize.length;
    }
    nurseryIndex = maxIndex = toIndex;
    /* Possible schedule finalizers to run */
    Collection.scheduleFinalizerThread();
}

Example 48 with ObjectReference

use of org.vmmagic.unboxed.ObjectReference in project JikesRVM by JikesRVM.

the class Mutator method loadReferenceField.

/**
 * Load and return the value of a reference field of an object.
 *
 * @param object The object to load the field of.
 * @param index The field index.
 * @return The object reference
 */
public ObjectReference loadReferenceField(ObjectReference object, int index) {
    Clock.stop();
    if (object.isNull())
        fail(("Object can not be null in object " + ObjectModel.getString(object)));
    Sanity.assertValid(object);
    int limit = ObjectModel.getRefs(object);
    if (!(index >= 0))
        fail(("Index must be non-negative in object " + ObjectModel.getString(object)));
    if (!(index < limit))
        fail(("Index " + index + " out of bounds " + limit + " in object " + ObjectModel.getString(object)));
    Address referenceSlot = ObjectModel.getRefSlot(object, index);
    ObjectReference result;
    Clock.start();
    if (ActivePlan.constraints.needsObjectReferenceReadBarrier()) {
        result = context.objectReferenceRead(object, referenceSlot, referenceSlot.toWord(), null, INSTANCE_FIELD);
    } else {
        result = referenceSlot.loadObjectReference();
    }
    Clock.stop();
    Sanity.assertValid(object);
    if (Trace.isEnabled(Item.LOAD) || ObjectModel.isWatched(object)) {
        Trace.printf(Item.LOAD, "[%s].object[%d] returned [%s]%n", ObjectModel.getString(object), index, result.toString());
    }
    Clock.start();
    return result;
}

Example 49 with ObjectReference

use of org.vmmagic.unboxed.ObjectReference in project JikesRVM by JikesRVM.

the class Mutator method getReferenceStackSlot.

public ObjectReference getReferenceStackSlot(Address slot) {
    ObjectReference ref = slot.loadObjectReference();
    Clock.stop();
    Sanity.assertValid(ref);
    Clock.start();
    return ref;
}

Example 50 with ObjectReference

use of org.vmmagic.unboxed.ObjectReference in project JikesRVM by JikesRVM.

the class Mutator method dumpHeap.

/**
 * Print the thread roots and add them to a stack for processing.
 */
public static void dumpHeap() {
    int width = 80;
    Deque<ObjectReference> workStack = new ArrayDeque<ObjectReference>();
    Set<ObjectReference> dumped = new HashSet<ObjectReference>();
    for (Mutator m : Mutators.getAll()) {
        System.err.println("Mutator " + m.context.getId());
        workStack.addAll(m.dumpThreadRoots(width));
    }
    System.err.println("Heap (Depth First)");
    while (!workStack.isEmpty()) {
        ObjectReference object = workStack.pop();
        if (!dumped.contains(object)) {
            dumped.add(object);
            workStack.addAll(ObjectModel.dumpLogicalObject(width, object));
        }
    }
}