Examples with GCIterator com.ibm.j9ddr.vm29.j9.gc.GCIterator used on opensource projects

Example 1 with GCIterator

use of com.ibm.j9ddr.vm29.j9.gc.GCIterator in project openj9 by eclipse.

the class LiveSetWalker method walkLiveSet.

/*
	 * Walks the LiveSet in preorder, returns a HashSet of all walked objects.  The HashSet is generated as a byproduct of the walk.
	 * 
	 * @return a HashSet containing all visited objects 
	 */
public static void walkLiveSet(ObjectVisitor visitor, RootSetType rootSetType) throws CorruptDataException {
    /* TODO: lpnguyen, use something less stupid than a hashSet (markMap?) for this */
    HashSet<J9ObjectPointer> visitedObjects = new HashSet<J9ObjectPointer>();
    /* Not using a singleton because we want to allow users to catch corruptData events.  Not worrying about the perf loss taken
		 * by doing this as walking the live set will probably take an order of magnitude longer anyway
		 */
    RootSet rootSet = RootSet.from(rootSetType, false);
    GCIterator rootIterator = rootSet.gcIterator(rootSetType);
    GCIterator rootAddressIterator = rootSet.gcIterator(rootSetType);
    while (rootIterator.hasNext()) {
        J9ObjectPointer nextObject = (J9ObjectPointer) rootIterator.next();
        VoidPointer nextAddress = rootAddressIterator.nextAddress();
        if (nextObject.notNull()) {
            scanObject(visitedObjects, visitor, nextObject, nextAddress);
        }
    }
}