Examples with JavaObject com.ibm.dtfj.java.JavaObject used on opensource projects

Example 51 with JavaObject

use of com.ibm.dtfj.java.JavaObject in project openj9 by eclipse.

the class PHDJavaHeap method getSections.

public Iterator<ImageSection> getSections() {
    List<ImageSection> c = new ArrayList<ImageSection>();
    // This is the start of the last object
    long last = runtime.maxAddress;
    if (runtime.minAddress <= runtime.maxAddress) {
        ImagePointer objPointer = space.getPointer(last);
        JavaObject lastObj = null;
        try {
            lastObj = getLastObject(objPointer, runtime.maxObjClass, runtime.maxObjLen);
        } catch (IOException e1) {
        // allow to fall through so that jo is null
        }
        try {
            // Find the end of the last object
            if (lastObj != null)
                last += lastObj.getSize();
            ImageSection s = new PHDImageSection(getName(), space.getPointer(runtime.minAddress), last - runtime.minAddress);
            c.add(s);
        } catch (CorruptDataException e) {
            ImageSection s = new PHDImageSection(getName(), space.getPointer(runtime.minAddress), last - runtime.minAddress);
            c.add(s);
            // The object will take some space
            s = new PHDCorruptImageSection("Corrupt " + getName(), objPointer, 8);
            c.add(s);
        }
    }
    if (runtime.minClassAddress <= runtime.maxClassAddress) {
        // Space in heap for class objects
        long last2 = runtime.maxClassAddress;
        ImagePointer objPointer = space.getPointer(last2);
        int insert = c.size();
        ImageSection s;
        try {
            JavaClass jc = runtime.findClass(last2);
            // Make sure the class takes up some room
            long size = 8;
            if (jc != null) {
                JavaObject lastObj = jc.getObject();
                if (lastObj != null && lastObj.getID().equals(jc.getID())) {
                    size = lastObj.getSize();
                }
            }
            last2 += size;
        } catch (CorruptDataException e) {
            s = new PHDCorruptImageSection("Corrupt " + getName(), objPointer, 8);
            c.add(s);
        }
        // Do the object and class object sections overlap, if so combine them
        if (last2 < runtime.minAddress || last < runtime.minClassAddress) {
            s = new PHDImageSection(getName(), space.getPointer(runtime.minClassAddress), last2 - runtime.minClassAddress);
            c.add(insert, s);
        } else {
            long minAddr = Math.min(runtime.minAddress, runtime.minClassAddress);
            long maxAddr = Math.max(last, last2);
            s = new PHDImageSection(getName(), space.getPointer(minAddr), maxAddr - minAddr);
            // Replace with a combined section
            c.set(0, s);
        }
    }
    return c.iterator();
}

Example 52 with JavaObject

use of com.ibm.dtfj.java.JavaObject in project openj9 by eclipse.

the class PHDJavaObject method getReferences.

public Iterator<JavaReference> getReferences() {
    fillInDetails(true);
    final JavaObject source = this;
    return new Iterator<JavaReference>() {

        int count = -1;

        Iterator<JavaClass> loaderCls = heap.runtime.getLoaderClasses(source);

        public boolean hasNext() {
            if (count < 0) {
                return true;
            } else if (loaderCls.hasNext()) {
                return true;
            } else if (refs instanceof LongEnumeration) {
                LongEnumeration le = (LongEnumeration) refs;
                return count < le.numberOfElements();
            } else if (refs instanceof long[]) {
                long[] arefs = (long[]) refs;
                return count < arefs.length;
            } else if (refs instanceof int[]) {
                int[] arefs = (int[]) refs;
                return count < arefs.length;
            } else {
                return false;
            }
        }

        public JavaReference next() {
            if (!hasNext())
                throw new NoSuchElementException("" + count++);
            long ref;
            int refType = PHDJavaReference.REFERENCE_UNKNOWN;
            JavaClass cls1;
            if (count == -1) {
                // Add the type
                cls1 = cls;
                // Doesn't matter
                ref = 0;
                ++count;
                refType = PHDJavaReference.REFERENCE_CLASS;
            } else if (loaderCls.hasNext()) {
                refType = PHDJavaReference.REFERENCE_LOADED_CLASS;
                cls1 = loaderCls.next();
                // Doesn't matter
                ref = 0;
            } else {
                if (refs instanceof LongEnumeration) {
                    LongEnumeration le = (LongEnumeration) refs;
                    ref = le.nextLong();
                    ++count;
                } else if (refs instanceof int[]) {
                    int[] arefs = (int[]) refs;
                    ref = heap.getJavaRuntime().expandAddress(arefs[count++]);
                } else {
                    long[] arefs = (long[]) refs;
                    ref = arefs[count++];
                }
                if (length >= 0) {
                    refType = PHDJavaReference.REFERENCE_ARRAY_ELEMENT;
                } else {
                    refType = PHDJavaReference.REFERENCE_FIELD;
                }
                cls1 = heap.getJavaRuntime().findClass(ref);
            }
            if (cls1 != null) {
                return new PHDJavaReference(cls1, source, PHDJavaReference.REACHABILITY_STRONG, refType, PHDJavaReference.HEAP_ROOT_UNKNOWN, "?");
            } else {
                return new PHDJavaReference(new PHDJavaObject.Builder(heap, ref, null, PHDJavaObject.NO_HASHCODE, -1).build(), source, PHDJavaReference.REACHABILITY_STRONG, refType, PHDJavaReference.HEAP_ROOT_UNKNOWN, "?");
            }
        }

        public void remove() {
            throw new UnsupportedOperationException();
        }
    };
}

Example 53 with JavaObject

use of com.ibm.dtfj.java.JavaObject in project openj9 by eclipse.

the class PHDJavaObject method fillInDetails.

/**
 * Sometimes a JavaObject is constructed without knowing anything about the type etc.
 * If this info is needed then try to retrieve it now.
 * @param withRefs Do we need to fill in the references array too?
 */
private void fillInDetails(boolean withRefs) {
    if (length == UNRESOLVED_TYPE || withRefs && refs == null) {
        JavaObject jo = heap.getObjectAtAddress(getID(), withRefs);
        if (equals(jo)) {
            PHDJavaObject po = (PHDJavaObject) jo;
            if (po.cls != null) {
                this.cls = po.cls;
                this.hashCode = po.hashCode;
                this.flags = po.flags;
            } else {
            // System.out.println("Oops null cls "+jo+" "+cls);
            }
            this.length = po.length;
            this.refs = po.refs;
        } else {
            // System.out.println("Oops "+jo+" "+this);
            length = UNKNOWN_TYPE;
        }
    }
}

Example 54 with JavaObject

use of com.ibm.dtfj.java.JavaObject in project openj9 by eclipse.

the class PHDJavaObject method arraycopy.

public void arraycopy(int srcStart, Object dst, int dstStart, int length) throws CorruptDataException, MemoryAccessException {
    if (dst == null)
        throw new NullPointerException("destination null");
    fillInDetails(true);
    if (!isArray())
        throw new IllegalArgumentException(this + " is not an array");
    JavaClass jc = getJavaClass();
    String type;
    try {
        type = jc.getName();
    } catch (CorruptDataException e) {
        // Presume all primitive arrays will have a real name
        type = "[L";
    }
    // System.out.println("array "+srcStart+" "+dst+" "+dstStart+" "+length);
    if (srcStart < 0 || length < 0 || dstStart < 0 || srcStart + length < 0 || dstStart + length < 0)
        throw new IndexOutOfBoundsException(srcStart + "," + dstStart + "," + length);
    if (srcStart + length > getArraySize())
        throw new IndexOutOfBoundsException(srcStart + "+" + length + ">" + getArraySize() + jc);
    if (dst instanceof JavaObject[]) {
        if (!type.startsWith("[[") && !type.startsWith("[L"))
            throw new IllegalArgumentException("Expected " + type + " not " + dst);
        JavaObject[] dst1 = (JavaObject[]) dst;
        // Get to the right point in the refs
        int count;
        if (refs instanceof LongEnumeration) {
            LongEnumeration le = (LongEnumeration) refs;
            count = le.numberOfElements();
            // Skip over the elements before the required start
            for (int idx = 0; idx < srcStart && idx < count; ++idx) {
                le.nextLong();
            }
        } else if (refs instanceof int[]) {
            int[] arefs = (int[]) refs;
            count = arefs.length;
        } else if (refs instanceof long[]) {
            long[] arefs = (long[]) refs;
            count = arefs.length;
        } else {
            throw new CorruptDataException(new PHDCorruptData("Unknown array contents", getID()));
        }
        // Copy the data to the destination
        for (int idx = srcStart; idx < srcStart + length; ++idx) {
            JavaObject target;
            if (idx < count) {
                long ref;
                if (refs instanceof LongEnumeration) {
                    LongEnumeration le = (LongEnumeration) refs;
                    ref = le.nextLong();
                } else if (refs instanceof int[]) {
                    int[] arefs = (int[]) refs;
                    ref = heap.getJavaRuntime().expandAddress(arefs[idx]);
                } else {
                    long[] arefs = (long[]) refs;
                    ref = arefs[idx];
                }
                target = new PHDJavaObject.Builder(heap, ref, null, PHDJavaObject.NO_HASHCODE, -1).build();
            } else {
                target = null;
            }
            int dstIndex = dstStart + (idx - srcStart);
            if (dstIndex >= dst1.length) {
                throw new IndexOutOfBoundsException("Array " + jc + " 0x" + Long.toHexString(address) + "[" + getArraySize() + "]" + "," + srcStart + "," + dst1 + "[" + dst1.length + "]" + "," + dstStart + "," + length + " at " + idx);
            }
            dst1[dstIndex] = target;
        }
    } else if (dst instanceof byte[]) {
        if (!type.startsWith("[B"))
            throw new IllegalArgumentException("Expected " + type + " not " + dst);
        byte[] dst1 = (byte[]) dst;
        if (dstStart + length > dst1.length)
            throw new IndexOutOfBoundsException();
    } else if (dst instanceof short[]) {
        if (!type.startsWith("[S"))
            throw new IllegalArgumentException("Expected " + type + " not " + dst);
        short[] dst1 = (short[]) dst;
        if (dstStart + length > dst1.length)
            throw new IndexOutOfBoundsException();
    } else if (dst instanceof int[]) {
        if (!type.startsWith("[I"))
            throw new IllegalArgumentException("Expected " + type + " not " + dst);
        int[] dst1 = (int[]) dst;
        if (dstStart + length > dst1.length)
            throw new IndexOutOfBoundsException();
    } else if (dst instanceof long[]) {
        if (!type.startsWith("[J"))
            throw new IllegalArgumentException("Expected " + type + " not " + dst);
        long[] dst1 = (long[]) dst;
        if (dstStart + length > dst1.length)
            throw new IndexOutOfBoundsException();
    } else if (dst instanceof boolean[]) {
        if (!type.startsWith("[Z"))
            throw new IllegalArgumentException("Expected " + type + " not " + dst);
        boolean[] dst1 = (boolean[]) dst;
        if (dstStart + length > dst1.length)
            throw new IndexOutOfBoundsException();
    } else if (dst instanceof char[]) {
        if (!type.startsWith("[C"))
            throw new IllegalArgumentException("Expected " + type + " not " + dst);
        char[] dst1 = (char[]) dst;
        if (dstStart + length > dst1.length)
            throw new IndexOutOfBoundsException();
    } else if (dst instanceof float[]) {
        if (!type.startsWith("[F"))
            throw new IllegalArgumentException("Expected " + type + " not " + dst);
        float[] dst1 = (float[]) dst;
        if (dstStart + length > dst1.length)
            throw new IndexOutOfBoundsException();
    } else if (dst instanceof double[]) {
        if (!type.startsWith("[D"))
            throw new IllegalArgumentException("Expected " + type + " not " + dst);
        double[] dst1 = (double[]) dst;
        if (dstStart + length > dst1.length)
            throw new IndexOutOfBoundsException();
    } else {
        throw new IllegalArgumentException("Expected " + type + " not " + dst);
    }
}

Example 55 with JavaObject

use of com.ibm.dtfj.java.JavaObject in project openj9 by eclipse.

the class PHDJavaRuntime method getObjectAtAddress.

public JavaObject getObjectAtAddress(ImagePointer address) throws CorruptDataException, IllegalArgumentException, MemoryAccessException, DataUnavailable {
    // Is it a class object?
    final long addr = address.getAddress();
    JavaClass cls = findClass(addr);
    JavaObject jo;
    if (cls != null) {
        jo = cls.getObject();
        if (jo != null && address.equals(jo.getID()))
            return jo;
    }
    if ((jo = extraObjectsCache.get(addr)) != null) {
        return jo;
    } else {
        // See if we already have this object
        for (PHDJavaHeap heap : heaps) {
            try {
                jo = heap.getCachedObjectAtAddress(address, false);
            } catch (IOException e) {
                throw new DataUnavailable("The requested object could not be read from the PHD file");
            }
            if (jo != null)
                return jo;
        }
        // Return a place holder object, may return corrupt data later
        jo = new PHDJavaObject.Builder(heaps.get(0), addr, null, PHDJavaObject.NO_HASHCODE, -1).build();
    }
    return jo;
}