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

Example 26 with J9ClassPointer

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

the class RamClassSummaryCommand method run.

public void run(String command, String[] args, Context context, PrintStream out) throws DDRInteractiveCommandException {
    try {
        J9JavaVMPointer vm = J9RASHelper.getVM(DataType.getJ9RASPointer());
        ClassSummaryHelper classSummaryHelper = new ClassSummaryHelper(preferredOrder);
        ClassSegmentIterator classSegmentIterator = new ClassSegmentIterator(vm.classMemorySegments());
        while (classSegmentIterator.hasNext()) {
            J9ClassPointer classPointer = (J9ClassPointer) classSegmentIterator.next();
            numberOfClasses++;
            ClassWalker classWalker = new RamClassWalker(classPointer, context);
            LinearDumper linearDumper = new LinearDumper();
            J9ClassRegionNode allRegionsNode = linearDumper.getAllRegions(classWalker);
            classSummaryHelper.addRegionsForClass(allRegionsNode);
        }
        classSummaryHelper.printStatistics(out);
    } catch (CorruptDataException e) {
        throw new DDRInteractiveCommandException(e);
    }
}

Example 27 with J9ClassPointer

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

the class VmCheckCommand method findMethodInVTable.

private boolean findMethodInVTable(J9MethodPointer method, J9ClassPointer classPointer) throws CorruptDataException {
    UDATAPointer vTable = J9ClassHelper.vTable(classPointer);
    long vTableSize = vTable.at(0).longValue();
    /* skip magic first entry */
    for (long vTableIndex = 2; vTableIndex <= vTableSize + 1; vTableIndex++) {
        // System.out.printf("%d COMP 0x%s vs. 0x%s\n", (int)vTableIndex, Long.toHexString(method.getAddress()), Long.toHexString(vTable.at(vTableIndex).longValue()));
        if (method.eq(J9MethodPointer.cast(vTable.at(vTableIndex)))) {
            return true;
        }
    }
    return false;
}

Example 28 with J9ClassPointer

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

the class VmCheckCommand method verifyJ9ClassHeader.

private boolean verifyJ9ClassHeader(J9JavaVMPointer javaVM, PrintStream out, J9ClassPointer classPointer) throws CorruptDataException {
    boolean passed = true;
    J9ROMClassPointer romClass = classPointer.romClass();
    String rootClasses = "java.lang.Object";
    if (false == J9ClassHelper.hasValidEyeCatcher(classPointer)) {
        reportError(out, "0x99669966 != eyecatcher (0x%s) for class=0x%s", Long.toHexString(classPointer.eyecatcher().longValue()), Long.toHexString(classPointer.getAddress()));
        passed = false;
    }
    if (romClass.isNull()) {
        reportError(out, "NULL == romClass for class=0x%s", Long.toHexString(classPointer.getAddress()));
        passed = false;
    }
    if (classPointer.classLoader().isNull()) {
        reportError(out, "NULL == classLoader for class=0x%s", Long.toHexString(classPointer.getAddress()));
        passed = false;
    }
    long classDepth = J9ClassHelper.classDepth(classPointer).longValue();
    if (classDepth > 0) {
        if (classPointer.superclasses().isNull()) {
            reportError(out, "NULL == superclasses for non-" + rootClasses + " class=0x%s", Long.toHexString(classPointer.getAddress()));
            passed = false;
        } else {
            // Verify that all entries of superclasses[] are non-null.
            for (long i = 0; i < classDepth; i++) {
                if (classPointer.superclasses().at(i).isNull()) {
                    reportError(out, "superclasses[%d] is NULL for class=0x%s", Long.toHexString(classPointer.getAddress()));
                    passed = false;
                    break;
                }
            }
        }
    } else {
        if (classPointer.superclasses().at(-1).notNull()) {
            reportError(out, "superclasses[-1] should be NULL for class=0x%s", Long.toHexString(classPointer.getAddress()));
            passed = false;
        }
    }
    if (classPointer.initializeStatus().eq(J9ClassInitFlags.J9ClassInitSucceeded)) {
        if (classPointer.classObject().isNull()) {
            reportError(out, "NULL == class->classObject for initialized class=0x%s", Long.toHexString(classPointer.getAddress()));
            passed = false;
        }
    }
    if (J9ClassHelper.isObsolete(classPointer)) {
        reportError(out, "clazz=0x%s is obsolete", Long.toHexString(classPointer.getAddress()));
        passed = false;
    }
    if (!romClass.isNull() && !romClass.romConstantPoolCount().eq(0)) {
        J9ConstantPoolPointer constantPool = J9ConstantPoolPointer.cast(classPointer.ramConstantPool());
        J9ClassPointer cpClass = constantPool.ramClass();
        if (!classPointer.eq(cpClass)) {
            reportError(out, "clazz=0x%s not equal clazz->ramConstantPool->ramClass=0x%s", Long.toHexString(classPointer.getAddress()), Long.toHexString(cpClass.getAddress()));
            passed = false;
        }
    }
    return passed;
}

Example 29 with J9ClassPointer

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

the class VmCheckCommand method checkJ9ClassSanity.

/*
	 *  Based on vmchk/checkclasses.c r1.7
	 *
	 *	J9Class sanity:
	 *		Eyecatcher check:
	 *			Ensure J9Class->eyecatcher == 0x99669966.
	 *
	 *		Superclasses check:
	 *			Ensure J9Class->superclasses != null unless J9Class is Object.
	 *
	 *		ClassObject null check:
	 *			Ensure J9Class->classObject != null if (J9Class->initializeStatus == J9ClassInitSucceeded)
	 *
	 *		ClassLoader segment check:
	 *			Ensure J9Class->classLoader->classSegments contains J9Class.
	 *
	 *		ConstantPool check:
	 *			Ensure J9Class->ramConstantPool->ramClass is equal to the J9Class.
	 *
	 *		Subclass hierarchy check:
	 *			Ensure subclasses can be traversed per the J9Class classDepth.
	 *
	 *		Obsolete class check:
	 *			Ensure obsolete classes are found in the replacedClass linked list on the currentClass.
	 */
private void checkJ9ClassSanity(J9JavaVMPointer javaVM, PrintStream out) throws CorruptDataException {
    reportMessage(out, "Checking classes");
    // Stolen from RootScaner.scanClasses()
    // GCClassLoaderIterator gcClassLoaderIterator =
    // GCClassLoaderIterator.from();
    GCSegmentIterator segmentIterator = GCSegmentIterator.fromJ9MemorySegmentList(javaVM.classMemorySegments(), J9MemorySegment.MEMORY_TYPE_RAM_CLASS);
    int count = 0;
    int obsoleteCount = 0;
    while (segmentIterator.hasNext()) {
        J9MemorySegmentPointer segment = segmentIterator.next();
        GCClassHeapIterator classHeapIterator = GCClassHeapIterator.fromJ9MemorySegment(segment);
        while (classHeapIterator.hasNext()) {
            J9ClassPointer clazz = classHeapIterator.next();
            if (!J9ClassHelper.isObsolete(clazz)) {
                verifyJ9Class(javaVM, out, clazz);
            } else {
                verifyObsoleteJ9Class(javaVM, out, clazz);
                obsoleteCount++;
            }
            count++;
        }
    }
    reportMessage(out, "Checking %d classes (%d obsolete) done", count, obsoleteCount);
}

Example 30 with J9ClassPointer

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

the class VmCheckCommand method verifyJ9ROMClass.

private void verifyJ9ROMClass(PrintStream out, J9JavaVMPointer vm, J9ClassPointer clazz) throws CorruptDataException {
    J9ROMClassPointer romClass = clazz.romClass();
    J9ClassLoaderPointer classLoader = clazz.classLoader();
    J9MemorySegmentPointer segment = findSegmentInClassLoaderForAddress(classLoader, romClass);
    if (!segment.isNull()) {
        long address;
        if (romClass.interfaceCount().longValue() != 0) {
            address = romClass.interfaces().getAddress();
            verifyAddressInSegment(out, vm, segment, address, "romClass->interfaces");
        }
        if (romClass.romMethodCount().longValue() != 0) {
            address = romClass.romMethods().longValue();
            verifyAddressInSegment(out, vm, segment, address, "romClass->romMethods");
        }
        if (romClass.romFieldCount().longValue() != 0) {
            address = romClass.romFields().longValue();
            verifyAddressInSegment(out, vm, segment, address, "romClass->romFields");
        }
        if (romClass.innerClassCount().longValue() != 0) {
            address = romClass.innerClasses().longValue();
            verifyAddressInSegment(out, vm, segment, address, "romClass->innerClasses");
        }
        U32Pointer cpShapeDescription = romClass.cpShapeDescription();
        /* TODO: is !isNull() check required or not? */
        if (!cpShapeDescription.isNull()) {
            address = cpShapeDescription.getAddress();
            verifyAddressInSegment(out, vm, segment, address, "romClass->cpShapeDescription");
        }
    }
    {
        J9UTF8Pointer className = romClass.className();
        J9UTF8Pointer superclassName = romClass.superclassName();
        J9UTF8Pointer outerClassName = romClass.outerClassName();
        if (className.isNull() || !verifyUTF8(className)) {
            reportError(out, "invalid className=0x%s utf8 for romClass=0x%s", Long.toHexString(className.getAddress()), Long.toHexString(romClass.getAddress()));
        }
        if (!superclassName.isNull() && !verifyUTF8(superclassName)) {
            reportError(out, "invalid superclassName=0x%s utf8 for romClass=0x%s", Long.toHexString(superclassName.getAddress()), Long.toHexString(romClass.getAddress()));
        }
        if (!outerClassName.isNull() && !verifyUTF8(outerClassName)) {
            reportError(out, "invalid outerclassName=0x%s utf8 for romClass=0x%s", Long.toHexString(outerClassName.getAddress()), Long.toHexString(romClass.getAddress()));
        }
    }
    U32 ramConstantPoolCount = romClass.ramConstantPoolCount();
    U32 romConstantPoolCount = romClass.romConstantPoolCount();
    if (ramConstantPoolCount.gt(romConstantPoolCount)) {
        reportError(out, "ramConstantPoolCount=%d > romConstantPoolCount=%d for romClass=0x%s", ramConstantPoolCount.longValue(), romConstantPoolCount.longValue(), Long.toHexString(romClass.getAddress()));
    }
}