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

Example 6 with GCSegmentIterator

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

the class VmCheckCommand method checkJ9ROMClassSanity.

/*
	 *  Based on vmchk/checkromclasses.c r1.5
	 * 
	 *	J9ROMClass sanity:
	 *		SRP check:
	 *			Ensure J9ROMClass->interfaces SRP is in the same segment if J9ROMClass->interfaceCount != 0.
	 *			Ensure J9ROMClass->romMethods SRP is in the same segment if J9ROMClass->romMethodCount != 0.
	 *			Ensure J9ROMClass->romFields SRP is in the same segment if J9ROMClass->romFieldCount != 0.
	 *			Ensure J9ROMClass->innerClasses SRP is in the same segment if J9ROMClass->innerClasseCount != 0.
	 *			Ensure cpShapeDescription in the same segment.
	 *			Ensure all SRPs are in range on 64 bit platforms (including className, superclassName, and outerClassName).
	 *
	 *		ConstantPool count check:
	 *			Ensure ramConstantPoolCount <= romConstantPoolCount
	 */
private void checkJ9ROMClassSanity(J9JavaVMPointer vm, PrintStream out) throws CorruptDataException {
    reportMessage(out, "Checking ROM classes");
    // Stolen from RootScaner.scanClasses()
    // GCClassLoaderIterator gcClassLoaderIterator =
    // GCClassLoaderIterator.from();
    GCSegmentIterator segmentIterator = GCSegmentIterator.fromJ9MemorySegmentList(vm.classMemorySegments(), J9MemorySegment.MEMORY_TYPE_RAM_CLASS);
    int count = 0;
    while (segmentIterator.hasNext()) {
        J9MemorySegmentPointer segment = segmentIterator.next();
        GCClassHeapIterator classHeapIterator = GCClassHeapIterator.fromJ9MemorySegment(segment);
        while (classHeapIterator.hasNext()) {
            J9ClassPointer clazz = classHeapIterator.next();
            verifyJ9ROMClass(out, vm, clazz);
            count++;
        }
    }
    reportMessage(out, "Checking %d ROM classes done", count);
}

Example 7 with GCSegmentIterator

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

the class SegmentTree method setSegmentList.

protected void setSegmentList(J9MemorySegmentListPointer segmentList) {
    ArrayList<J9MemorySegmentPointer> segments = new ArrayList<J9MemorySegmentPointer>();
    try {
        // Batch up the entries
        GCSegmentIterator iterator = GCSegmentIterator.fromJ9MemorySegmentList(segmentList, 0);
        while (iterator.hasNext()) {
            segments.add(iterator.next());
        }
    } catch (CorruptDataException e) {
        EventManager.raiseCorruptDataEvent("Corrupted segment in list", e, false);
        cache = new J9MemorySegmentPointer[0];
    }
    // And sort them
    Collections.sort(segments, new Comparator<J9MemorySegmentPointer>() {

        public int compare(J9MemorySegmentPointer seg1, J9MemorySegmentPointer seg2) {
            try {
                return seg1.eq(seg2) ? 0 : seg1.heapBase().lt(seg2.heapBase()) ? -1 : 1;
            } catch (CorruptDataException e) {
                EventManager.raiseCorruptDataEvent("Corrupted segment in list", e, false);
                return -1;
            }
        }
    });
    cache = segments.toArray(new J9MemorySegmentPointer[segments.size()]);
}