Examples with J9ROMSingleSlotConstantRefPointer com.ibm.j9ddr.vm29.pointer.generated.J9ROMSingleSlotConstantRefPointer used on opensource projects

Example 1 with J9ROMSingleSlotConstantRefPointer

use of com.ibm.j9ddr.vm29.pointer.generated.J9ROMSingleSlotConstantRefPointer in project openj9 by eclipse.

the class J9BCUtil method dumpCallSiteData.

/**
 * This method is Java implementation of rdump.c#dumpCallSiteData function.
 * This method is called when dumping a ROMClass.
 * This method has only affect for invokedDynamic stuff,
 * for other ROMClasses, there wont be anything to print since their callsite and bsm count are zero.
 *
 * @param out PrintStream to print the user info to the console
 * @param romClass ROMClass address in the dump file.
 *
 * @throws CorruptDataException
 */
private static void dumpCallSiteData(PrintStream out, J9ROMClassPointer romClass) throws CorruptDataException {
    int HEX_RADIX = 16;
    long callSiteCount = romClass.callSiteCount().longValue();
    long bsmCount = romClass.bsmCount().longValue();
    SelfRelativePointer callSiteData = SelfRelativePointer.cast(romClass.callSiteData());
    U16Pointer bsmIndices = U16Pointer.cast(callSiteData.addOffset(4 * callSiteCount));
    if (0 != callSiteCount) {
        out.println(String.format("  Call Sites (%d):\n", callSiteCount));
        for (int i = 0; i < callSiteCount; i++) {
            J9ROMNameAndSignaturePointer nameAndSig = J9ROMNameAndSignaturePointer.cast(callSiteData.add(i).get());
            out.println("    Name: " + J9UTF8Helper.stringValue(nameAndSig.name()));
            out.println("    Signature: " + J9UTF8Helper.stringValue(nameAndSig.signature()));
            out.println("    Bootstrap Method Index: " + bsmIndices.at(i).longValue());
            out.println();
        }
    }
    if (0 != bsmCount) {
        J9ROMConstantPoolItemPointer constantPool = ConstantPoolHelpers.J9_ROM_CP_FROM_ROM_CLASS(romClass);
        U32Pointer cpShapeDescription = romClass.cpShapeDescription();
        U16Pointer bsmDataCursor = bsmIndices.add(callSiteCount);
        out.println(String.format("  Bootstrap Methods (%d):", bsmCount));
        for (int i = 0; i < bsmCount; i++) {
            J9ROMMethodHandleRefPointer methodHandleRef = J9ROMMethodHandleRefPointer.cast(constantPool.add(bsmDataCursor.at(0).longValue()));
            bsmDataCursor = bsmDataCursor.add(1);
            /* methodRef will be either a field or a method ref - they both have the same shape so we can pretend it is always a methodref */
            J9ROMMethodRefPointer methodRef = J9ROMMethodRefPointer.cast(constantPool.add(methodHandleRef.methodOrFieldRefIndex().longValue()));
            J9ROMClassRefPointer classRef = J9ROMClassRefPointer.cast(constantPool.add(methodRef.classRefCPIndex().longValue()));
            J9ROMNameAndSignaturePointer nameAndSig = methodRef.nameAndSignature();
            long bsmArgumentCount = bsmDataCursor.at(0).longValue();
            bsmDataCursor = bsmDataCursor.add(1);
            out.println("    Name: " + J9UTF8Helper.stringValue(classRef.name()) + "." + J9UTF8Helper.stringValue(nameAndSig.name()));
            out.println("    Signature: " + J9UTF8Helper.stringValue(nameAndSig.signature()));
            out.println(String.format("    Bootstrap Method Arguments (%d):", bsmArgumentCount));
            for (; 0 != bsmArgumentCount; bsmArgumentCount--) {
                long argCPIndex = bsmDataCursor.at(0).longValue();
                bsmDataCursor = bsmDataCursor.add(1);
                J9ROMConstantPoolItemPointer item = constantPool.add(argCPIndex);
                long shapeDesc = ConstantPoolHelpers.J9_CP_TYPE(cpShapeDescription, (int) argCPIndex);
                if (shapeDesc == J9CPTYPE_CLASS) {
                    J9ROMClassRefPointer romClassRef = J9ROMClassRefPointer.cast(item);
                    out.println("      Class: " + J9UTF8Helper.stringValue(romClassRef.name()));
                } else if (shapeDesc == J9CPTYPE_STRING) {
                    J9ROMStringRefPointer romStringRef = J9ROMStringRefPointer.cast(item);
                    out.println("      String: " + J9UTF8Helper.stringValue(romStringRef.utf8Data()));
                } else if (shapeDesc == J9CPTYPE_INT) {
                    J9ROMSingleSlotConstantRefPointer singleSlotConstantRef = J9ROMSingleSlotConstantRefPointer.cast(item);
                    out.println("      Int: " + singleSlotConstantRef.data().getHexValue());
                } else if (shapeDesc == J9CPTYPE_FLOAT) {
                    J9ROMSingleSlotConstantRefPointer singleSlotConstantRef = J9ROMSingleSlotConstantRefPointer.cast(item);
                    FloatPointer floatPtr = FloatPointer.cast(singleSlotConstantRef.dataEA());
                    out.println("      Float: " + floatPtr.getHexValue() + " (" + floatPtr.floatAt(0) + ")");
                } else if (shapeDesc == J9CPTYPE_LONG) {
                    String hexValue = "";
                    if (J9BuildFlags.env_littleEndian) {
                        hexValue += item.slot2().getHexValue();
                        hexValue += item.slot1().getHexValue().substring(2);
                    } else {
                        hexValue += item.slot1().getHexValue();
                        hexValue += item.slot2().getHexValue().substring(2);
                    }
                    long longValue = Long.parseLong(hexValue.substring(2), HEX_RADIX);
                    out.println("      Long: " + hexValue + "(" + longValue + ")");
                } else if (shapeDesc == J9CPTYPE_DOUBLE) {
                    String hexValue = "";
                    if (J9BuildFlags.env_littleEndian) {
                        hexValue += item.slot2().getHexValue();
                        hexValue += item.slot1().getHexValue().substring(2);
                    } else {
                        hexValue += item.slot1().getHexValue();
                        hexValue += item.slot2().getHexValue().substring(2);
                    }
                    long longValue = Long.parseLong(hexValue.substring(2), HEX_RADIX);
                    double doubleValue = Double.longBitsToDouble(longValue);
                    out.println("      Double: " + hexValue + "(" + Double.toString(doubleValue) + ")");
                } else if (shapeDesc == J9CPTYPE_FIELD) {
                    J9ROMFieldRefPointer romFieldRef = J9ROMFieldRefPointer.cast(item);
                    classRef = J9ROMClassRefPointer.cast(constantPool.add(romFieldRef.classRefCPIndex()));
                    nameAndSig = romFieldRef.nameAndSignature();
                    out.println("      Field: " + J9UTF8Helper.stringValue(classRef.name()) + "." + J9UTF8Helper.stringValue(nameAndSig.name()) + " " + J9UTF8Helper.stringValue(nameAndSig.signature()));
                } else if ((shapeDesc == J9CPTYPE_INSTANCE_METHOD) || (shapeDesc == J9CPTYPE_STATIC_METHOD) || (shapeDesc == J9CPTYPE_HANDLE_METHOD) || (shapeDesc == J9CPTYPE_INTERFACE_METHOD)) {
                    J9ROMMethodRefPointer romMethodRef = J9ROMMethodRefPointer.cast(item);
                    classRef = J9ROMClassRefPointer.cast(constantPool.add(romMethodRef.classRefCPIndex()));
                    nameAndSig = romMethodRef.nameAndSignature();
                    out.println("      Method: " + J9UTF8Helper.stringValue(classRef.name()) + "." + J9UTF8Helper.stringValue(nameAndSig.name()) + " " + J9UTF8Helper.stringValue(nameAndSig.signature()));
                } else if (shapeDesc == J9CPTYPE_METHOD_TYPE) {
                    J9ROMMethodTypeRefPointer romMethodTypeRef = J9ROMMethodTypeRefPointer.cast(item);
                    out.println("      Method Type: " + J9UTF8Helper.stringValue(J9UTF8Pointer.cast(romMethodTypeRef.signature())));
                } else if (shapeDesc == J9CPTYPE_METHODHANDLE) {
                    methodHandleRef = J9ROMMethodHandleRefPointer.cast(item);
                    methodRef = J9ROMMethodRefPointer.cast(constantPool.add(methodHandleRef.methodOrFieldRefIndex()));
                    classRef = J9ROMClassRefPointer.cast(constantPool.add(methodRef.classRefCPIndex()));
                    nameAndSig = methodRef.nameAndSignature();
                    out.print("      Method Handle: " + J9UTF8Helper.stringValue(classRef.name()) + "." + J9UTF8Helper.stringValue(nameAndSig.name()));
                    long methodType = methodHandleRef.handleTypeAndCpType().rightShift((int) J9DescriptionCpTypeShift).longValue();
                    if ((methodType == MH_REF_GETFIELD) || (methodType == MH_REF_PUTFIELD) || (methodType == MH_REF_GETSTATIC) || (methodType == MH_REF_PUTSTATIC)) {
                        out.print(" ");
                    }
                    out.println(J9UTF8Helper.stringValue(nameAndSig.signature()));
                } else {
                    out.println("      <unknown type>");
                }
            }
        }
    }
}

Example 2 with J9ROMSingleSlotConstantRefPointer

use of com.ibm.j9ddr.vm29.pointer.generated.J9ROMSingleSlotConstantRefPointer in project openj9 by eclipse.

the class ByteCodeDumper method j9bcutil_dumpBytecodes.

private static IDATA j9bcutil_dumpBytecodes(PrintStream out, J9ROMClassPointer romClass, U8Pointer bytecodes, UDATA walkStartPC, UDATA walkEndPC, U32 flags, String indent) throws Exception {
    J9ROMConstantPoolItemPointer constantPool = J9ROMClassHelper.constantPool(romClass);
    J9ROMConstantPoolItemPointer info;
    J9ROMNameAndSignaturePointer nameAndSig;
    bigEndian = flags.anyBitsIn(BCT_BigEndianOutput);
    UDATA index = new UDATA(0);
    UDATA target = new UDATA(0);
    UDATA start;
    UDATA pc;
    UDATA bc;
    I32 low, high;
    U32 npairs;
    J9ROMMethodPointer romMethod = (J9ROMMethodPointer.cast(bytecodes.sub(J9ROMMethod.SIZEOF)));
    U32 localsCount = new U32(ROMHelp.J9_ARG_COUNT_FROM_ROM_METHOD(romMethod).add(ROMHelp.J9_TEMP_COUNT_FROM_ROM_METHOD(romMethod)));
    int[] resultArray = new int[8192];
    String environment = "0";
    boolean envVarDefined = false;
    int result;
    if (System.getenv().containsKey("j9bcutil_dumpBytecodes")) {
        envVarDefined = true;
        environment = System.getenv().get("j9bcutil_dumpBytecodes");
    }
    pc = new UDATA(walkStartPC);
    // cell address
    bcIndex = bytecodes.add(pc);
    while (pc.lte(walkEndPC)) {
        if (flags.anyBitsIn(BCT_DumpMaps)) {
            for (int j = LOCAL_MAP; j < MAP_COUNT; j++) {
                if (envVarDefined && (!pc.eq(Integer.parseInt(environment)))) {
                    continue;
                }
                boolean wrapLine = false;
                UDATA outputCount = new UDATA(0);
                U8 mapChar = new U8('0');
                switch(j) {
                    case LOCAL_MAP:
                        result = LocalMap.j9localmap_LocalBitsForPC(romMethod, pc, resultArray);
                        mapChar = new U8('l');
                        outputCount = new UDATA(localsCount);
                        break;
                    case DEBUG_MAP:
                        result = DebugLocalMap.j9localmap_DebugLocalBitsForPC(romMethod, pc, resultArray);
                        mapChar = new U8('d');
                        outputCount = new UDATA(localsCount);
                        break;
                    case STACK_MAP:
                        /* First call is to get the stack depth */
                        result = StackMap.j9stackmap_StackBitsForPC(pc, romClass, romMethod, null, 0);
                        mapChar = new U8('s');
                        outputCount = new UDATA(result);
                        break;
                }
                if (outputCount.eq(0)) {
                    out.append(String.format("               %cmap [empty]", (char) mapChar.intValue()));
                } else {
                    out.append(String.format("               %cmap [%5d] =", (char) mapChar.intValue(), outputCount.intValue()));
                }
                for (int i = 0; outputCount.gt(i); i++) {
                    int x = i / 32;
                    if ((i % 8) == 0) {
                        out.append(" ");
                        if (wrapLine) {
                            out.append(nl);
                        }
                    }
                    out.append(String.format("%d ", resultArray[x] & 1));
                    resultArray[x] >>= 1;
                    wrapLine = (((i + 1) % 32) == 0);
                }
                out.append(nl);
            }
        }
        // _GETNEXT_U8(bc, bcIndex);
        // #define _GETNEXT_U8(value, index) (bc = *(bcIndex++))
        // error
        bc = new UDATA(_GETNEXT_U8());
        out.append(String.format("%s%5d %s ", indent, pc.intValue(), BCNames.getName(bc.intValue())));
        start = new UDATA(pc);
        pc = pc.add(1);
        switch(bc.intValue()) {
            case JBbipush:
                index = new UDATA(_GETNEXT_U8());
                out.append(String.format("%d\n", new I8(index).intValue()));
                pc = pc.add(1);
                break;
            case JBsipush:
                index = new UDATA(_GETNEXT_U16());
                out.append(String.format("%d\n", new I16(index).intValue()));
                pc = pc.add(2);
                break;
            case JBldc:
            case JBldcw:
                if (bc.eq(JBldc)) {
                    index = new UDATA(_GETNEXT_U8());
                    pc = pc.add(1);
                } else {
                    index = new UDATA(_GETNEXT_U16());
                    pc = pc.add(2);
                }
                out.append(String.format("%d ", index.intValue()));
                info = constantPool.add(index);
                J9ROMSingleSlotConstantRefPointer romSingleSlotConstantRef = J9ROMSingleSlotConstantRefPointer.cast(info);
                if (!romSingleSlotConstantRef.cpType().eq(BCT_J9DescriptionCpTypeScalar)) {
                    /* this is a string or class constant */
                    if (romSingleSlotConstantRef.cpType().eq(BCT_J9DescriptionCpTypeClass)) {
                        /* ClassRef */
                        out.append("(java.lang.Class) ");
                    } else {
                        /* StringRef */
                        out.append("(java.lang.String) ");
                    }
                    out.append(J9UTF8Helper.stringValue(J9ROMStringRefPointer.cast(info).utf8Data()));
                    out.append(nl);
                } else {
                    /* this is a float/int constant */
                    out.append(String.format("(int/float) 0x%08X", romSingleSlotConstantRef.data().longValue()));
                    out.append(nl);
                }
                break;
            case JBldc2lw:
                index = new UDATA(_GETNEXT_U16());
                out.append(String.format("%d ", index.intValue()));
                info = constantPool.add(index);
                out.append(String.format("(long) 0x%08X%08X\n", bigEndian ? info.slot1().longValue() : info.slot2().longValue(), bigEndian ? info.slot2().longValue() : info.slot1().longValue()));
                pc = pc.add(2);
                break;
            case JBldc2dw:
                index = new UDATA(_GETNEXT_U16());
                out.append(String.format("%d ", index.intValue()));
                info = constantPool.add(index);
                /* this will print incorrectly on Linux ARM! FIX ME! */
                out.append(String.format("(double) 0x%08X%08X\n", bigEndian ? info.slot1().longValue() : info.slot2().longValue(), bigEndian ? info.slot2().longValue() : info.slot1().longValue()));
                pc = pc.add(2);
                break;
            case JBiload:
            case JBlload:
            case JBfload:
            case JBdload:
            case JBaload:
            case JBistore:
            case JBlstore:
            case JBfstore:
            case JBdstore:
            case JBastore:
                index = new UDATA(_GETNEXT_U8());
                pc = pc.add(1);
                out.append(String.format("%d\n", index.intValue()));
                break;
            case JBiloadw:
            case JBlloadw:
            case JBfloadw:
            case JBdloadw:
            case JBaloadw:
            case JBistorew:
            case JBlstorew:
            case JBfstorew:
            case JBdstorew:
            case JBastorew:
                index = new UDATA(_GETNEXT_U16());
                incIndex();
                pc = pc.add(3);
                out.append(String.format("%d\n", index.intValue()));
                break;
            case JBiinc:
                index = new UDATA(_GETNEXT_U8());
                out.append(String.format("%d ", index.intValue()));
                target = new UDATA(_GETNEXT_U8());
                out.append(String.format("%d\n", new I8(target).intValue()));
                pc = pc.add(2);
                break;
            case JBiincw:
                index = new UDATA(_GETNEXT_U16());
                out.append(String.format("%d ", index.intValue()));
                index = new UDATA(_GETNEXT_U16());
                out.append(String.format("%d\n", new I16(index).intValue()));
                incIndex();
                pc = pc.add(5);
                break;
            case JBifeq:
            case JBifne:
            case JBiflt:
            case JBifge:
            case JBifgt:
            case JBifle:
            case JBificmpeq:
            case JBificmpne:
            case JBificmplt:
            case JBificmpge:
            case JBificmpgt:
            case JBificmple:
            case JBifacmpeq:
            case JBifacmpne:
            case JBgoto:
            case JBifnull:
            case JBifnonnull:
                index = new UDATA(_GETNEXT_U16());
                pc = pc.add(2);
                if (OPCODE_RELATIVE_BRANCHES != 0) {
                    target = start.add(new I16(index));
                } else {
                    target = pc.add(new I16(index));
                }
                out.append(String.format("%d\n", target.intValue()));
                break;
            case JBtableswitch:
                switch(start.intValue() % 4) {
                    case 0:
                        incIndex();
                        // fall through
                        pc = pc.add(1);
                    case 1:
                        incIndex();
                        // fall through
                        pc = pc.add(1);
                    case 2:
                        incIndex();
                        // fall through
                        pc = pc.add(1);
                    case 3:
                        break;
                }
                index = new UDATA(_GETNEXT_U32());
                target = start.add(index);
                index = new UDATA(_GETNEXT_U32());
                low = new I32(index);
                index = new UDATA(_GETNEXT_U32());
                high = new I32(index);
                pc = pc.add(12);
                out.append(String.format("low %d high %d\n", low.intValue(), high.intValue()));
                out.append(String.format("        default %10d\n", target.intValue()));
                npairs = new U32(high.sub(low).add(1));
                for (int i = 0; npairs.gt(i); i++) {
                    index = new UDATA(_GETNEXT_U32());
                    target = start.add(index);
                    out.append(String.format("     %10d %10d\n", low.add(i).intValue(), target.intValue()));
                    pc = pc.add(4);
                }
                break;
            case JBlookupswitch:
                switch(start.intValue() % 4) {
                    case 0:
                        incIndex();
                        pc = pc.add(1);
                        break;
                    case 1:
                        incIndex();
                        pc = pc.add(1);
                        break;
                    case 2:
                        incIndex();
                        pc = pc.add(1);
                        break;
                    case 3:
                        break;
                }
                index = new UDATA(_GETNEXT_U32());
                target = start.add(index);
                npairs = new U32(_GETNEXT_U32());
                out.append(String.format("pairs %d\n", npairs.intValue()));
                out.append(String.format("        default %10d\n", target.intValue()));
                pc = pc.add(8);
                for (int i = 0; npairs.gt(i); i++) {
                    index = new UDATA(_GETNEXT_U32());
                    out.append(String.format("     %10d", index.intValue()));
                    index = new UDATA(_GETNEXT_U32());
                    target = start.add(index);
                    out.append(String.format(" %10d\n", target.intValue()));
                    pc = pc.add(8);
                }
                break;
            case JBgetstatic:
            case JBputstatic:
            case JBgetfield:
            case JBputfield:
                index = new UDATA(_GETNEXT_U16());
                info = constantPool.add(index);
                out.append(String.format("%d ", index.intValue()));
                // dump declaringClassName
                J9ROMFieldRefPointer romFieldRef = J9ROMFieldRefPointer.cast(info);
                out.append(J9UTF8Helper.stringValue(J9ROMClassRefPointer.cast(constantPool.add(romFieldRef.classRefCPIndex())).name()));
                nameAndSig = romFieldRef.nameAndSignature();
                out.append(".");
                /* dump name */
                out.append(J9UTF8Helper.stringValue(nameAndSig.name()));
                out.append(" ");
                /* dump signature */
                out.append(J9UTF8Helper.stringValue(nameAndSig.signature()));
                out.append(nl);
                pc = pc.add(2);
                break;
            case JBinvokedynamic:
                index = new UDATA(_GETNEXT_U16());
                out.append(String.format("%d ", index.intValue()));
                long callSiteCount = romClass.callSiteCount().longValue();
                SelfRelativePointer callSiteData = SelfRelativePointer.cast(romClass.callSiteData());
                U16Pointer bsmIndices = U16Pointer.cast(callSiteData.addOffset(4 * callSiteCount));
                nameAndSig = J9ROMNameAndSignaturePointer.cast(callSiteData.add(index).get());
                out.append("bsm #" + String.valueOf(bsmIndices.at(index).longValue()));
                /* Bootstrap method index */
                out.append(":");
                out.append(J9UTF8Helper.stringValue(nameAndSig.name()));
                /* dump name */
                out.append(J9UTF8Helper.stringValue(nameAndSig.signature()));
                /* dump signature */
                out.append(nl);
                pc = pc.add(4);
                break;
            case JBinvokeinterface2:
                incIndex();
                pc = pc.add(1);
                out.append(nl);
                break;
            case JBinvokehandle:
            case JBinvokehandlegeneric:
            case JBinvokevirtual:
            case JBinvokespecial:
            case JBinvokestatic:
            case JBinvokeinterface:
            case JBinvokespecialsplit:
            case JBinvokestaticsplit:
                if (bcIndex.longValue() == 0) {
                    bcIndex = bcIndex.sub(1);
                }
                index = new UDATA(_GETNEXT_U16());
                if (bc.intValue() == JBinvokestaticsplit) {
                    index = new UDATA(romClass.staticSplitMethodRefIndexes().at(index));
                } else if (bc.intValue() == JBinvokespecialsplit) {
                    index = new UDATA(romClass.specialSplitMethodRefIndexes().at(index));
                }
                info = constantPool.add(index);
                out.append(String.format("%d ", index.intValue()));
                /* dump declaringClassName and signature */
                J9ROMMethodRefPointer romMethodRef = J9ROMMethodRefPointer.cast(info);
                U32 classRefCPIndex = romMethodRef.classRefCPIndex();
                J9ROMConstantPoolItemPointer cpItem = constantPool.add(classRefCPIndex);
                J9ROMClassRefPointer romClassRef = J9ROMClassRefPointer.cast(cpItem);
                String name = J9UTF8Helper.stringValue(romClassRef.name());
                out.append(name);
                nameAndSig = romMethodRef.nameAndSignature();
                out.append(".");
                out.append(J9UTF8Helper.stringValue(nameAndSig.name()));
                /* dump name */
                out.append(J9UTF8Helper.stringValue(nameAndSig.signature()));
                /*
																 * dump
																 * signature
																 */
                out.append(nl);
                pc = pc.add(2);
                break;
            case JBnew:
            case JBnewdup:
            case JBanewarray:
            case JBcheckcast:
            case JBinstanceof:
                index = new UDATA(_GETNEXT_U16());
                info = constantPool.add(index);
                out.append(String.format("%d ", index.intValue()));
                out.append(J9UTF8Helper.stringValue(J9ROMStringRefPointer.cast(info).utf8Data()));
                out.append(nl);
                pc = pc.add(2);
                break;
            case JBnewarray:
                index = new UDATA(_GETNEXT_U8());
                switch(index.intValue()) {
                    case /* T_BOOLEAN */
                    4:
                        out.append("boolean\n");
                        break;
                    case /* T_CHAR */
                    5:
                        out.append("char\n");
                        break;
                    case /* T_FLOAT */
                    6:
                        out.append("float\n");
                        break;
                    case /* T_DOUBLE */
                    7:
                        out.append("double\n");
                        break;
                    case /* T_BYTE */
                    8:
                        out.append("byte\n");
                        break;
                    case /* T_SHORT */
                    9:
                        out.append("short\n");
                        break;
                    case /* T_INT */
                    10:
                        out.append("int\n");
                        break;
                    case /* T_LONG */
                    11:
                        out.append("long\n");
                        break;
                    default:
                        out.append(String.format("(unknown type %d)\n", index.intValue()));
                        break;
                }
                pc = pc.add(1);
                break;
            case JBmultianewarray:
                index = new UDATA(_GETNEXT_U16());
                info = constantPool.add(index);
                out.append(String.format("%d ", index.intValue()));
                index = new UDATA(_GETNEXT_U8());
                out.append(String.format("dims %d ", index.intValue()));
                /* dump name */
                out.append(J9UTF8Helper.stringValue(J9ROMStringRefPointer.cast(info).utf8Data()));
                out.append(nl);
                pc = pc.add(3);
                break;
            case JBgotow:
                index = new UDATA(_GETNEXT_U32());
                pc = pc.add(4);
                if (OPCODE_RELATIVE_BRANCHES != 0) {
                    target = start.add(index);
                } else {
                    target = pc.add(index);
                }
                out.append(String.format("%d\n", target.intValue()));
                break;
            default:
                out.append(nl);
                break;
        }
    }
    return new IDATA(BCT_ERR_NO_ERROR);
}