Examples with J9ClassPointer com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer used on opensource projects

Example 51 with J9ClassPointer

use of com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer in project openj9 by eclipse.

the class J9JavaVMHelper method getMethodFromPC.

/*
	 * Returns a program space pointer to the matching J9Method for the
	 * specified PC.
	 */
public static J9MethodPointer getMethodFromPC(J9JavaVMPointer vmPtr, U8Pointer pc) throws CorruptDataException {
    GCClassLoaderIterator it = GCClassLoaderIterator.from();
    while (it.hasNext()) {
        J9ClassLoaderPointer loader = it.next();
        Iterator<J9ClassPointer> classIt = ClassIterator.fromJ9Classloader(loader);
        while (classIt.hasNext()) {
            J9ClassPointer clazz = classIt.next();
            J9MethodPointer result = J9ClassHelper.getMethodFromPCAndClass(clazz, pc);
            if (!result.isNull()) {
                return result;
            }
        }
    }
    return J9MethodPointer.NULL;
}

Example 52 with J9ClassPointer

use of com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer in project openj9 by eclipse.

the class J9ClassHelper method getRawModifiers.

/**
 * Returns "raw" modifiers
 *
 * Derived from logic in J9VMJavaLangClassNativesCDLC.getModifiersImpl
 * @param j9class
 * @return
 * @throws CorruptDataException
 */
public static int getRawModifiers(J9ClassPointer j9class) throws CorruptDataException {
    if (J9ClassHelper.isArrayClass(j9class)) {
        J9ArrayClassPointer arrayClass = J9ArrayClassPointer.cast(j9class);
        U32 modifiers = arrayClass.leafComponentType().romClass().modifiers();
        // OR in the bogus Sun bits
        modifiers = modifiers.bitOr(J9JavaAccessFlags.J9AccAbstract);
        modifiers = modifiers.bitOr(J9JavaAccessFlags.J9AccFinal);
        return modifiers.intValue();
    } else {
        U32 modifiers = j9class.romClass().modifiers();
        if (j9class.romClass().outerClassName().notNull()) {
            modifiers = j9class.romClass().memberAccessFlags();
        }
        return modifiers.intValue();
    }
}

Example 53 with J9ClassPointer

use of com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer in project openj9 by eclipse.

the class J9ClassLoaderHelper method findClass.

/* TODO: this is slightly bogus, if a class is not found in current classloader, we should use it's parent classloader */
/**
 * Return class for MixedObject or component class type for array classes.
 * @param classLoader
 * @param signature JNI Class signature
 * @return J9ClassPointer of a class or null if class is not found.
 * @throws CorruptDataException
 */
public static J9ClassPointer findClass(J9ClassLoaderPointer classLoader, String signature) throws CorruptDataException {
    J9ClassPointer result = null;
    Iterator<J9ClassPointer> classIterator = ClassIterator.fromJ9Classloader(classLoader);
    int arity = calculateClassArity(signature);
    if (arity > 0 && signature.charAt(arity) != 'L') {
        return PRIMITIVE_TO_CLASS.get(signature.charAt(arity));
    } else {
        while (classIterator.hasNext()) {
            J9ClassPointer clazz = classIterator.next();
            result = match(signature, arity, clazz);
            if (null != result) {
                break;
            }
        }
    }
    return result;
}

Example 54 with J9ClassPointer

use of com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer in project openj9 by eclipse.

the class J9ClassLoaderHelper method match.

private static J9ClassPointer match(String searchSignature, int arity, J9ClassPointer clazz) throws CorruptDataException {
    String classSignature = J9ClassHelper.getSignature(clazz);
    J9ClassPointer result = null;
    if (matchLeafComponentType(searchSignature, arity, classSignature)) {
        result = getArrayClassWithArity(clazz, arity);
    }
    return result;
}

Example 55 with J9ClassPointer

use of com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer in project openj9 by eclipse.

the class J9ClassHelper method size.

public static UDATA size(J9ClassPointer clazz, J9JavaVMPointer vm) throws CorruptDataException {
    /*
		 * Size includes up to 7 fragments:
		 * 		0. RAM class header = J9Class struct + vTable + JIT vTable
		 * 		1. RAM methods + extended method block
		 * 		2. Superclasses
		 * 		3. Instance description
		 * 		4. iTable
		 * 		5. Static slots
		 * 		6. Constant pool
		 * 
		 * Array classes omit 1, 3, 5 and 6.
		 */
    // Fragment 0. RAM class header = J9Class struct + vTable + JIT vTable
    UDATA size = new UDATA(J9Class.SIZEOF);
    UDATA vTableSlotCount = vTable(clazz).at(0);
    size = size.add(Scalar.convertSlotsToBytes(vTableSlotCount));
    if (vm.jitConfig().notNull()) {
        UDATA jitVTableSlotCount = vTableSlotCount.sub(1);
        size = size.add(Scalar.convertSlotsToBytes(jitVTableSlotCount));
    }
    if (!J9ROMClassHelper.isArray(clazz.romClass())) {
        // Fragment 1. RAM methods + extended method block
        U32 ramMethodsSize = clazz.romClass().romMethodCount().mult((int) J9Method.SIZEOF);
        size = size.add(ramMethodsSize);
        if (vm.runtimeFlags().allBitsIn(J9Consts.J9_RUNTIME_EXTENDED_METHOD_BLOCK)) {
            UDATA extendedMethodBlockSize = Scalar.roundToSizeofUDATA(new UDATA(clazz.romClass().romMethodCount()));
            size = size.add(extendedMethodBlockSize);
        }
        // Fragment 3. Instance description
        if (!clazz.instanceDescription().anyBitsIn(1)) {
            UDATA highestBitInSlot = new UDATA(UDATA.SIZEOF * 8 - 1);
            UDATA instanceDescriptionSize = clazz.totalInstanceSize().rightShift((int) (ObjectReferencePointer.SIZEOF >> 2) + 1);
            instanceDescriptionSize = instanceDescriptionSize.add(highestBitInSlot).bitAnd(highestBitInSlot.bitNot());
            if (J9BuildFlags.gc_leafBits) {
                instanceDescriptionSize = instanceDescriptionSize.mult(2);
            }
            size = size.add(instanceDescriptionSize);
        }
        // Fragment 5. Static slots
        U32 staticSlotCount = clazz.romClass().objectStaticCount().add(clazz.romClass().singleScalarStaticCount());
        if (J9BuildFlags.env_data64) {
            staticSlotCount = staticSlotCount.add(clazz.romClass().doubleScalarStaticCount());
        } else {
            staticSlotCount = staticSlotCount.add(1).bitAnd(~1L).add(clazz.romClass().doubleScalarStaticCount().mult(2));
        }
        size = size.add(Scalar.convertSlotsToBytes(new UDATA(staticSlotCount)));
        // Fragment 6. Constant pool
        U32 constantPoolSlotCount = clazz.romClass().ramConstantPoolCount().mult(2);
        size = size.add(Scalar.convertSlotsToBytes(new UDATA(constantPoolSlotCount)));
    }
    // Fragment 2. Superclasses
    UDATA classDepth = classDepthAndFlags(clazz).bitAnd(J9JavaAccessFlags.J9AccClassDepthMask);
    if (classDepth.eq(0)) {
        // java/lang/Object has a single slot superclasses array
        size = size.add(UDATA.SIZEOF);
    } else {
        size = size.add(Scalar.convertSlotsToBytes(classDepth));
    }
    // Fragment 4. iTable
    if (clazz.iTable().notNull()) {
        J9ClassPointer superclass = J9ClassPointer.cast(clazz.superclasses().at(classDepth.sub(1)));
        if (superclass.isNull() || !superclass.iTable().eq(clazz.iTable())) {
            J9ITablePointer iTable = J9ITablePointer.cast(clazz.iTable());
            // Scan to the last iTable belonging to classPointer
            if (superclass.isNull()) {
                while (iTable.next().notNull()) {
                    iTable = iTable.next();
                }
            } else {
                while (iTable.next().notNull() && !iTable.next().eq(superclass.iTable())) {
                    iTable = iTable.next();
                }
            }
            // Find the end of the last iTable
            if (clazz.romClass().modifiers().allBitsIn(J9Consts.J9_JAVA_INTERFACE)) {
                iTable = iTable.add(1);
            } else {
                iTable = iTable.add(1).addOffset(iTable.interfaceClass().romClass().romMethodCount().mult(UDATA.SIZEOF));
            }
            size = size.add(iTable.getAddress() - clazz.iTable().getAddress());
        }
    }
    return size;
}