Examples with J9DDRCorruptData com.ibm.j9ddr.view.dtfj.image.J9DDRCorruptData used on opensource projects

Example 1 with J9DDRCorruptData

use of com.ibm.j9ddr.view.dtfj.image.J9DDRCorruptData in project openj9 by eclipse.

the class DTFJJavaClass method getDeclaredFields.

@SuppressWarnings("rawtypes")
public Iterator getDeclaredFields() {
    List<Object> list = declaredFieldsCache.get(j9class);
    if (list == null) {
        list = new LinkedList<Object>();
        final List<Object> fieldList = list;
        IEventListener corruptDataListener = new IEventListener() {

            public void corruptData(String message, com.ibm.j9ddr.CorruptDataException e, boolean fatal) {
                J9DDRCorruptData cd = J9DDRDTFJUtils.newCorruptData(DTFJContext.getProcess(), e);
                fieldList.add(cd);
            }
        };
        try {
            register(corruptDataListener);
            J9ClassPointer superclass = J9ClassPointer.NULL;
            try {
                superclass = getSuperClassPointer();
            } catch (com.ibm.j9ddr.CorruptDataException e1) {
                // pass null for the superclass to just list this classes fields as cannot determine superclass
                fieldList.add(J9DDRDTFJUtils.newCorruptData(DTFJContext.getProcess(), "Unable to determine superclass"));
            }
            U32 flags = new U32(J9ROMFieldOffsetWalkState.J9VM_FIELD_OFFSET_WALK_INCLUDE_STATIC | J9ROMFieldOffsetWalkState.J9VM_FIELD_OFFSET_WALK_INCLUDE_INSTANCE);
            long fieldCount = j9class.romClass().romFieldCount().longValue();
            Iterator<J9ObjectFieldOffset> fields = null;
            if (fieldCount > MAX_CLASS_FIELDS) {
                fieldList.add(J9DDRDTFJUtils.newCorruptData(DTFJContext.getProcess(), "Corrupt field count"));
            } else {
                fields = J9ObjectFieldOffsetIterator.J9ObjectFieldOffsetIteratorFor(j9class, superclass, flags);
            }
            while (fields != null && fields.hasNext()) {
                try {
                    J9ObjectFieldOffset field = fields.next();
                    log.fine(String.format("Declared field : %s", field.getName()));
                    if (field.isStatic()) {
                        fieldList.add(new DTFJJavaFieldStatic(this, field));
                    } else {
                        fieldList.add(new DTFJJavaFieldInstance(this, field));
                    }
                } catch (com.ibm.j9ddr.CorruptDataException e) {
                    // add the corrupted field to the iterator
                    fieldList.add(J9DDRDTFJUtils.newCorruptData(DTFJContext.getProcess(), e));
                }
                if (fieldList.size() > fieldCount) {
                    // The class has returned more fields than it said it contained, it is corrupt.
                    // add the corrupted field to the iterator
                    fieldList.add(J9DDRDTFJUtils.newCorruptData(DTFJContext.getProcess(), "Corrupt class returned more fields than it declared"));
                    break;
                }
            }
            /* Large lists of fields are likely to be corrupt data so
				 * don't cache them.
				 */
            if (fieldList.size() < 1024) {
                declaredFieldsCache.put(j9class, fieldList);
            }
        } catch (Throwable t) {
            fieldList.add(J9DDRDTFJUtils.handleAsCorruptData(DTFJContext.getProcess(), t));
        } finally {
            unregister(corruptDataListener);
        }
    }
    return list.iterator();
}

Example 2 with J9DDRCorruptData

use of com.ibm.j9ddr.view.dtfj.image.J9DDRCorruptData in project openj9 by eclipse.

the class DTFJJavaObject method arraycopy.

public void arraycopy(int srcStart, Object dst, int dstStart, int length) throws CorruptDataException, MemoryAccessException {
    fetchDeferredData();
    if (!objectIsArray) {
        throw new IllegalArgumentException("Object is not an array");
    }
    J9IndexableObjectPointer array = J9IndexableObjectPointer.cast(object);
    try {
        validateArrayCopyParameters(array, srcStart, dst, dstStart, length);
        // CMVC 171150 : use helper object to correctly get the class name
        String className = J9IndexableObjectHelper.getClassName(array);
        if ((null == className) || (className.length() < 2)) {
            J9DDRCorruptData cd = new J9DDRCorruptData(DTFJContext.getProcess(), "The class name for this object could not be determined", object.getAddress());
            throw new CorruptDataException(cd);
        }
        if (className.charAt(1) == 'L' || className.charAt(1) == '[') {
            // JExtract/DTFJ can cope with dst of either Object[] or JavaObject[] - but we need to detect other things
            if (!dst.getClass().equals(Object[].class) && !(dst instanceof JavaObject[])) {
                throw new IllegalArgumentException("Type of dst object (" + dst.getClass().getName() + ") incompatible with Object array. Should be JavaObject[] or Object[]");
            }
            J9ObjectPointer[] intermediateArray = new J9ObjectPointer[length];
            Object[] castedDst = (Object[]) dst;
            if (dstStart + (long) length > castedDst.length) {
                throw new ArrayIndexOutOfBoundsException("Supplied destination array too small. Requires: " + (dstStart + (long) length) + ", was " + castedDst.length);
            }
            J9IndexableObjectHelper.getData(array, intermediateArray, srcStart, length, 0);
            for (int i = 0; i < length; i++) {
                if (intermediateArray[i].isNull()) {
                    castedDst[dstStart + i] = null;
                } else {
                    castedDst[dstStart + i] = new DTFJJavaObject(intermediateArray[i]);
                }
            }
        } else {
            // For primitives we can pass through the client object. The type verification will be done in J9IndexableObjectPointer
            J9IndexableObjectHelper.getData(array, dst, srcStart, length, dstStart);
        }
    } catch (Throwable t) {
        throw J9DDRDTFJUtils.handleAllButMemAccExAsCorruptDataException(DTFJContext.getProcess(), t, whitelist);
    }
}