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

Example 26 with PointerPointer

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

the class RamClassWalker method allSlotsInRAMSuperClassesDo.

private void allSlotsInRAMSuperClassesDo() throws CorruptDataException {
    /* The classDepth represent the number of superclasses */
    final long classDepth = J9ClassHelper.classDepth(ramClass).longValue();
    /*
		 * The superclasses is an array, ramClass.superclasses() points to the
		 * head and we get the next superclasses by moving the pointer.
		 * superclasses.add(i) adds sizeof(UDATA) to the value of the
		 * superclass'pointer
		 */
    final PointerPointer superclasses = ramClass.superclasses();
    for (int i = 0; i < classDepth; i++) {
        classWalkerCallback.addSlot(clazz, SlotType.J9_UDATA, superclasses.add(i), "SuperClass address", "!j9class");
    }
    classWalkerCallback.addSection(clazz, superclasses, classDepth * PointerPointer.SIZEOF, "Superclasses", false);
}

Example 27 with PointerPointer

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

the class RomClassWalker method allSlotsInConstantPoolDo.

private void allSlotsInConstantPoolDo() throws CorruptDataException {
    J9ROMConstantPoolItemPointer constantPool;
    int index;
    U32Pointer cpShapeDescription;
    int constPoolCount;
    constantPool = J9ROMClassHelper.constantPool(romClass);
    cpShapeDescription = romClass.cpShapeDescription();
    if (cpShapeDescription.isNull()) {
        return;
    }
    constPoolCount = romClass.romConstantPoolCount().intValue();
    PointerPointer cpEntry = PointerPointer.cast(J9ROMClassHelper.constantPool(romClass));
    // The spaces at the end of "Constant Pool" are important since the
    // regions are sorted
    // by address and size, but when they are equal they are sorted by
    // longest name and "Constant Pool" has to come first
    classWalkerCallback.addSection(clazz, constantPool, constPoolCount * U64.SIZEOF, "constantPool              ", true);
    for (index = 0; index < constPoolCount; index++) {
        long shapeDesc = ConstantPoolHelpers.J9_CP_TYPE(cpShapeDescription, index);
        if (shapeDesc == J9CPTYPE_CLASS) {
            J9ROMStringRefPointer ref = J9ROMStringRefPointer.cast(cpEntry);
            classWalkerCallback.addSlot(clazz, SlotType.J9_ROM_UTF8, ref.utf8DataEA(), "cpFieldUtf8");
            classWalkerCallback.addSlot(clazz, SlotType.J9_U32, ref.cpTypeEA(), "cpFieldType");
        } else if ((shapeDesc == J9CPTYPE_STRING) || (shapeDesc == J9CPTYPE_ANNOTATION_UTF8)) {
            J9ROMStringRefPointer ref = J9ROMStringRefPointer.cast(cpEntry);
            classWalkerCallback.addSlot(clazz, SlotType.J9_ROM_UTF8, ref.utf8DataEA(), "cpFieldUtf8");
            classWalkerCallback.addSlot(clazz, SlotType.J9_U32, ref.cpTypeEA(), "cpFieldType");
        } else if (shapeDesc == J9CPTYPE_INT) {
            J9ROMConstantPoolItemPointer ref = J9ROMConstantPoolItemPointer.cast(cpEntry);
            classWalkerCallback.addSlot(clazz, SlotType.J9_U32, ref.slot1EA(), "cpFieldInt");
            classWalkerCallback.addSlot(clazz, SlotType.J9_U32, ref.slot2EA(), "cpFieldIntUnused");
        } else if (shapeDesc == J9CPTYPE_FLOAT) {
            J9ROMConstantPoolItemPointer ref = J9ROMConstantPoolItemPointer.cast(cpEntry);
            classWalkerCallback.addSlot(clazz, SlotType.J9_U32, ref.slot1EA(), "cpFieldFloat");
            classWalkerCallback.addSlot(clazz, SlotType.J9_U32, ref.slot2EA(), "cpFieldFloatUnused");
        } else if (shapeDesc == J9CPTYPE_LONG) {
            classWalkerCallback.addSlot(clazz, SlotType.J9_I64, I64Pointer.cast(cpEntry), "cpField8");
        } else if (shapeDesc == J9CPTYPE_DOUBLE) {
            classWalkerCallback.addSlot(clazz, SlotType.J9_I64, I64Pointer.cast(cpEntry), "cpField8");
        } else if (shapeDesc == J9CPTYPE_FIELD) {
            J9ROMFieldRefPointer ref = J9ROMFieldRefPointer.cast(cpEntry);
            classWalkerCallback.addSlot(clazz, SlotType.J9_SRPNAS, ref.nameAndSignatureEA(), "cpFieldNAS");
            classWalkerCallback.addSlot(clazz, SlotType.J9_U32, ref.classRefCPIndexEA(), "cpFieldClassRef");
        } else if ((shapeDesc == J9CPTYPE_HANDLE_METHOD) || (shapeDesc == J9CPTYPE_STATIC_METHOD) || (shapeDesc == J9CPTYPE_INSTANCE_METHOD) || (shapeDesc == J9CPTYPE_INTERFACE_METHOD)) {
            J9ROMMethodRefPointer ref = J9ROMMethodRefPointer.cast(cpEntry);
            classWalkerCallback.addSlot(clazz, SlotType.J9_SRPNAS, ref.nameAndSignatureEA(), "cpFieldNAS");
            classWalkerCallback.addSlot(clazz, SlotType.J9_U32, ref.classRefCPIndexEA(), "cpFieldClassRef");
        } else if (shapeDesc == J9CPTYPE_METHOD_TYPE) {
            J9ROMMethodTypeRefPointer ref = J9ROMMethodTypeRefPointer.cast(cpEntry);
            classWalkerCallback.addSlot(clazz, SlotType.J9_ROM_UTF8, ref.signatureEA(), "signature");
            classWalkerCallback.addSlot(clazz, SlotType.J9_U32, ref.cpTypeEA(), "cpType");
        } else if (shapeDesc == J9CPTYPE_METHODHANDLE) {
            J9ROMMethodHandleRefPointer ref = J9ROMMethodHandleRefPointer.cast(cpEntry);
            classWalkerCallback.addSlot(clazz, SlotType.J9_U32, ref.methodOrFieldRefIndexEA(), "methodOrFieldRefIndex");
            classWalkerCallback.addSlot(clazz, SlotType.J9_U32, ref.handleTypeAndCpTypeEA(), "handleTypeAndCpType");
        } else if ((shapeDesc == J9CPTYPE_UNUSED) || (shapeDesc == J9CPTYPE_UNUSED8)) {
            classWalkerCallback.addSlot(clazz, SlotType.J9_I64, I64Pointer.cast(cpEntry), "cpFieldUnused");
        }
        cpEntry = cpEntry.addOffset(J9ROMConstantPoolItem.SIZEOF);
    }
}

Example 28 with PointerPointer

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

the class ITableSizeCommand method run.

public void run(String command, String[] args, Context context, PrintStream out) throws DDRInteractiveCommandException {
    long currentSize = 0;
    long duplicatedSize = 0;
    long extendedSize = 0;
    try {
        J9JavaVMPointer vm = J9RASHelper.getVM(DataType.getJ9RASPointer());
        ClassSegmentIterator classSegmentIterator = new ClassSegmentIterator(vm.classMemorySegments());
        while (classSegmentIterator.hasNext()) {
            J9ClassPointer clazz = (J9ClassPointer) classSegmentIterator.next();
            int classDepth = clazz.classDepthAndFlags().bitAnd(J9_JAVA_CLASS_DEPTH_MASK).intValue();
            J9ITablePointer superITable = J9ITablePointer.NULL;
            J9ITablePointer startITable = J9ITablePointer.cast(clazz.iTable());
            if (0 != classDepth) {
                PointerPointer superclasses = clazz.superclasses();
                J9ClassPointer superclazz = J9ClassPointer.cast(superclasses.at(classDepth - 1));
                superITable = J9ITablePointer.cast(superclazz.iTable());
            }
            currentSize += iTableChainSize(startITable, superITable);
            duplicatedSize += iTableChainSize(superITable, J9ITablePointer.NULL);
            extendedSize += iTableExtendedSize(startITable, superITable);
        }
    } catch (CorruptDataException e) {
        throw new DDRInteractiveCommandException(e);
    }
    long totalSize = duplicatedSize + currentSize;
    double percent = (double) totalSize / (double) currentSize;
    out.append("iTable duplication" + nl);
    out.append("------------------" + nl);
    out.append("current    iTable size : " + currentSize + nl);
    out.append("additional iTable size : " + duplicatedSize + nl);
    out.append("total      iTable size : " + totalSize + nl);
    out.append("growth factor          : " + percent + nl);
    out.append(nl);
    percent = (double) extendedSize / (double) currentSize;
    out.append("iTable contains extends" + nl);
    out.append("-----------------------" + nl);
    out.append("current    iTable size : " + currentSize + nl);
    out.append("new        iTable size : " + extendedSize + nl);
    out.append("growth factor          : " + percent + nl);
    out.append(nl);
}

Example 29 with PointerPointer

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

the class VMConstantPoolCommand method run.

/**
 * Run method for !vmconstantpool extension.
 *
 * @param command  !vmconstantpool
 * @param args	args passed by !vmconstantpool extension.
 * @param context Context
 * @param out PrintStream
 * @throws DDRInteractiveCommandException
 */
public void run(String command, String[] args, Context context, PrintStream out) throws DDRInteractiveCommandException {
    try {
        J9JavaVMPointer javaVM;
        javaVM = J9RASHelper.getVM(DataType.getJ9RASPointer());
        if (args.length == 1) {
            long vmaddress = CommandUtils.parsePointer(args[0], J9BuildFlags.env_data64);
            if (vmaddress != javaVM.getAddress()) {
                out.println(args[0] + " is not a valid j9javavm address. Run !findvm to find out the j9javavm address of the current context");
                return;
            }
        } else if (args.length > 1) {
            printUsage(out);
        }
        J9ConstantPoolPointer jclConstantPool = J9ConstantPoolPointer.cast(javaVM.jclConstantPoolEA());
        J9ROMClassPointer romClass = jclConstantPool.ramClass().romClass();
        int index;
        U32Pointer cpShapeDescription;
        int constPoolCount;
        cpShapeDescription = romClass.cpShapeDescription();
        long cpDescription = cpShapeDescription.at(0).longValue();
        constPoolCount = romClass.romConstantPoolCount().intValue();
        PointerPointer cpEntry = PointerPointer.cast(J9ROMClassHelper.constantPool(romClass));
        long cpDescriptionIndex = 0;
        for (index = 0; index < constPoolCount; index++) {
            if (0 == cpDescriptionIndex) {
                // Load a new description word
                cpDescription = cpShapeDescription.at(0).longValue();
                cpShapeDescription = cpShapeDescription.add(1);
                cpDescriptionIndex = J9_CP_DESCRIPTIONS_PER_U32;
            }
            long shapeDesc = cpDescription & J9_CP_DESCRIPTION_MASK;
            AbstractPointer ref = PointerPointer.NULL;
            if (shapeDesc == J9CPTYPE_CLASS) {
                ref = J9ROMClassRefPointer.cast(cpEntry);
            } else if (shapeDesc == J9CPTYPE_STRING) {
                ref = J9ROMStringRefPointer.cast(cpEntry);
            } else if ((shapeDesc == J9CPTYPE_INT) || (shapeDesc == J9CPTYPE_FLOAT)) {
                ref = J9ROMConstantPoolItemPointer.cast(cpEntry);
            } else if (shapeDesc == J9CPTYPE_LONG) {
                U64Pointer longPointer = U64Pointer.cast(cpEntry);
                out.println("Long at " + longPointer.getHexAddress() + " {\n\t0x0: U64:" + longPointer.getHexValue() + "\n}");
            } else if (shapeDesc == J9CPTYPE_DOUBLE) {
                U64Pointer longPointer = U64Pointer.cast(cpEntry);
                out.println("Double at " + longPointer.getHexAddress() + " {\n\t0x0: U64:" + longPointer.at(0).longValue() + "\n}");
            } else if ((shapeDesc == J9CPTYPE_INSTANCE_METHOD) || (shapeDesc == J9CPTYPE_STATIC_METHOD) || (shapeDesc == J9CPTYPE_INTERFACE_METHOD) || (shapeDesc == J9CPTYPE_HANDLE_METHOD) || (shapeDesc == J9CPTYPE_FIELD)) {
                long classRefCPIndex;
                if (shapeDesc == J9CPTYPE_FIELD) {
                    ref = J9ROMFieldRefPointer.cast(cpEntry);
                    /* gets the classRefCPIndex to obtain a pointer to the j9romclassref */
                    classRefCPIndex = J9ROMFieldRefPointer.cast(ref).classRefCPIndex().longValue();
                } else {
                    ref = J9ROMFieldRefPointer.cast(cpEntry);
                    classRefCPIndex = J9ROMMethodRefPointer.cast(ref).classRefCPIndex().longValue();
                }
                PointerPointer classRefCPEntry = PointerPointer.cast(J9ROMClassHelper.constantPool(romClass)).addOffset(J9ROMConstantPoolItem.SIZEOF * classRefCPIndex);
                /* gets the DDR output of the item */
                String outString = ref.formatFullInteractive();
                String[] parts = outString.split(nl);
                /* add a debug extension(!j9romclassref) on the second line of the output */
                parts[1] += "(!j9romclassref " + classRefCPEntry.getHexAddress() + ")";
                out.print(join(nl, parts));
            } else if ((shapeDesc == J9CPTYPE_UNUSED) || (shapeDesc == J9CPTYPE_UNUSED8)) {
                U64Pointer longPointer = U64Pointer.cast(cpEntry);
                out.println("Unused at " + longPointer.getHexAddress() + " {\n\t0x0: U64:" + longPointer.at(0).longValue() + "\n}");
            } else if (ref.notNull()) {
                out.println(ref.formatFullInteractive());
            }
            cpEntry = cpEntry.addOffset(J9ROMConstantPoolItem.SIZEOF);
            cpDescription >>= J9_CP_BITS_PER_DESCRIPTION;
            cpDescriptionIndex -= 1;
        }
    } catch (CorruptDataException e) {
        throw new DDRInteractiveCommandException(e);
    }
}

Example 30 with PointerPointer

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

the class CheckEngine method checkClassStatics.

private int checkClassStatics(J9ClassPointer clazz) {
    int result = J9MODRON_GCCHK_RC_OK;
    try {
        boolean validationRequired = true;
        if (J9ClassHelper.isSwappedOut(clazz)) {
            /* if class has been hot swapped (J9AccClassHotSwappedOut bit is set) in Fast HCR,
				 * the ramStatics of the existing class may be reused.  The J9ClassReusedStatics
				 * bit in J9Class->extendedClassFlags will be set if that's the case.
				 * In Extended HCR mode ramStatics might be not NULL and must be valid
				 * NOTE: If class is hot swapped and the value in ramStatics is NULL it is valid 
				 * to have the correspondent ROM Class value in objectStaticCount field greater then 0
				 */
            if (J9ClassHelper.isArrayClass(clazz)) {
                /* j9arrayclass should not be hot swapped */
                result = J9MODRON_GCCHK_RC_CLASS_HOT_SWAPPED_FOR_ARRAY;
                CheckError error = new CheckError(clazz, _cycle, _currentCheck, "Class ", result, _cycle.nextErrorCount());
                _reporter.report(error);
                return result;
            }
            if (J9ClassHelper.areExtensionsEnabled()) {
                /* This is Extended HSR mode so hot swapped class might have NULL in ramStatics field */
                if (clazz.ramStatics().isNull()) {
                    validationRequired = false;
                }
            }
            try {
                /* This case can also occur when running -Xint with extensions enabled */
                if (J9ClassHelper.extendedClassFlags(clazz).allBitsIn(J9JavaClassFlags.J9ClassReusedStatics)) {
                    validationRequired = false;
                }
            } catch (NoSuchFieldError e) {
            /* Flag must be missing from the core. */
            }
        }
        if (validationRequired) {
            // J9ClassLoaderPointer classLoader = clazz.classLoader();
            J9ROMClassPointer romClazz = clazz.romClass();
            UDATA numberOfReferences = new UDATA(0);
            PointerPointer sectionStart = PointerPointer.NULL;
            PointerPointer sectionEnd = PointerPointer.NULL;
            /*
				 * Note: we have no special recognition for J9ArrayClass here
				 * J9ArrayClass does not have a ramStatics field but something else at this place
				 * so direct check (NULL != clazz->ramStatics) would not be correct,
				 * however romClazz->objectStaticCount must be 0 for this case
				 */
            if (!romClazz.objectStaticCount().eq(0)) {
                sectionStart = PointerPointer.cast(clazz.ramStatics());
                sectionEnd = sectionStart.add(romClazz.objectStaticCount());
            }
            /* Iterate all fields of ROM Class looking to statics fields pointed to java objects */
            Iterator<J9ObjectFieldOffset> objectFieldOffsetIterator = J9ObjectFieldOffsetIterator.J9ObjectFieldOffsetIteratorFor(clazz, J9ClassHelper.superclass(clazz), new U32(J9VM_FIELD_OFFSET_WALK_INCLUDE_STATIC | J9VM_FIELD_OFFSET_WALK_ONLY_OBJECT_SLOTS));
            while (objectFieldOffsetIterator.hasNext()) {
                J9ObjectFieldOffset fieldOffset = objectFieldOffsetIterator.next();
                // J9ROMFieldShapePointer field = fieldOffset.getField();
                numberOfReferences = numberOfReferences.add(1);
                /* get address of next field */
                PointerPointer address = sectionStart.addOffset(fieldOffset.getOffsetOrAddress());
                /* an address must be in gc scan range */
                if (!(address.gte(sectionStart) && address.lt(sectionEnd))) {
                    result = J9MODRON_GCCHK_RC_CLASS_STATICS_REFERENCE_IS_NOT_IN_SCANNING_RANGE;
                    CheckError error = new CheckError(clazz, address, _cycle, _currentCheck, "Class ", result, _cycle.nextErrorCount());
                    _reporter.report(error);
                }
            /* check only if we have an object */
            // TODO kmt : can't easily implement this part of the check
            // J9Class* classToCast = vm->internalVMFunctions->internalFindClassUTF8(currentThread, toSearchString, toSearchLength, classLoader, J9_FINDCLASS_FLAG_EXISTING_ONLY);
            // if ((NULL == classToCast) || (0 == instanceOfOrCheckCast(J9GC_J9OBJECT_CLAZZ(*address), classToCast))) {
            // The issue is that we can't simply call "internalFindClassUTF8" in DDR.
            // We could guess at the behaviour of the ClassLoader, but that makes
            // distingushing a real problem from a weird ClassLoader delegation
            // model difficult.
            }
            if (!numberOfReferences.eq(romClazz.objectStaticCount())) {
                result = J9MODRON_GCCHK_RC_CLASS_STATICS_WRONG_NUMBER_OF_REFERENCES;
                CheckError error = new CheckError(clazz, _cycle, _currentCheck, "Class ", result, _cycle.nextErrorCount());
                _reporter.report(error);
            }
        }
    } catch (CorruptDataException e) {
        // TODO : cde should be part of the error
        CheckError error = new CheckError(clazz, _cycle, _currentCheck, "Class ", J9MODRON_GCCHK_RC_CORRUPT_DATA_EXCEPTION, _cycle.nextErrorCount());
        _reporter.report(error);
    }
    return result;
}