Examples with Attribute com.oracle.truffle.espresso.runtime.Attribute used on opensource projects

Example 11 with Attribute

use of com.oracle.truffle.espresso.runtime.Attribute in project graal by oracle.

the class ClassfileParser method parseCodeAttribute.

private CodeAttribute parseCodeAttribute(Symbol<Name> name) {
    int maxStack = stream.readU2();
    int maxLocals = stream.readU2();
    final int codeLength = stream.readS4();
    if (codeLength <= 0) {
        throw ConstantPool.classFormatError("code_length must be > than 0");
    } else if (codeLength > 0xFFFF) {
        throw ConstantPool.classFormatError("code_length > than 64 KB");
    }
    byte[] code;
    try (DebugCloseable codeRead = CODE_READ.scope(context.getTimers())) {
        code = stream.readByteArray(codeLength);
    }
    ExceptionHandler[] entries;
    try (DebugCloseable handlers = EXCEPTION_HANDLERS.scope(context.getTimers())) {
        entries = parseExceptionHandlerEntries();
    }
    int attributeCount = stream.readU2();
    final Attribute[] codeAttributes = spawnAttributesArray(attributeCount);
    int totalLocalTableCount = 0;
    CommonAttributeParser commonAttributeParser = new CommonAttributeParser(InfoType.Code);
    StackMapTableAttribute stackMapTable = null;
    for (int i = 0; i < attributeCount; i++) {
        final int attributeNameIndex = stream.readU2();
        final Symbol<Name> attributeName;
        attributeName = pool.symbolAt(attributeNameIndex, "attribute name");
        final int attributeSize = stream.readS4();
        final int startPosition = stream.getPosition();
        if (attributeName.equals(Name.LineNumberTable)) {
            codeAttributes[i] = parseLineNumberTable(attributeName);
        } else if (attributeName.equals(Name.LocalVariableTable)) {
            codeAttributes[i] = parseLocalVariableAttribute(attributeName, codeLength, maxLocals);
            totalLocalTableCount++;
        } else if (attributeName.equals(Name.LocalVariableTypeTable)) {
            codeAttributes[i] = parseLocalVariableTypeAttribute(attributeName, codeLength, maxLocals);
        } else if (attributeName.equals(Name.StackMapTable)) {
            if (stackMapTable != null) {
                throw ConstantPool.classFormatError("Duplicate StackMapTable attribute");
            }
            codeAttributes[i] = stackMapTable = parseStackMapTableAttribute(attributeName, attributeSize);
        } else {
            Attribute attr = commonAttributeParser.parseCommonAttribute(attributeName, attributeSize);
            // stream.skip(attributeSize);
            codeAttributes[i] = attr == null ? new Attribute(attributeName, stream.readByteArray(attributeSize)) : attr;
        }
        if (attributeSize != stream.getPosition() - startPosition) {
            throw ConstantPool.classFormatError("Invalid attribute length for " + attributeName + " attribute");
        }
    }
    if (totalLocalTableCount > 0) {
        validateLocalTables(codeAttributes);
    }
    return new CodeAttribute(name, maxStack, maxLocals, code, entries, codeAttributes, majorVersion);
}

Example 12 with Attribute

use of com.oracle.truffle.espresso.runtime.Attribute in project graal by oracle.

the class ClassfileParser method parseClassImpl.

private ParserKlass parseClassImpl() {
    readMagic();
    minorVersion = stream.readU2();
    majorVersion = stream.readU2();
    verifyVersion(majorVersion, minorVersion);
    try (DebugCloseable closeable = CONSTANT_POOL.scope(context.getTimers())) {
        this.pool = ConstantPool.parse(context.getLanguage(), stream, this, classDefinitionInfo.patches, context, majorVersion, minorVersion);
    }
    // JVM_ACC_MODULE is defined in JDK-9 and later.
    if (majorVersion >= JAVA_9_VERSION) {
        classFlags = stream.readU2() & (JVM_RECOGNIZED_CLASS_MODIFIERS | ACC_MODULE);
    } else {
        classFlags = stream.readU2() & (JVM_RECOGNIZED_CLASS_MODIFIERS);
    }
    if ((classFlags & ACC_INTERFACE) != 0 && majorVersion < JAVA_6_VERSION) {
        // Set abstract bit for old class files for backward compatibility
        classFlags |= ACC_ABSTRACT;
    }
    boolean isModule = (classFlags & ACC_MODULE) != 0;
    if (isModule) {
        throw ConstantPool.noClassDefFoundError(classType + " is not a class because access_flag ACC_MODULE is set");
    }
    if (badConstantSeen != null) {
        // https://bugs.openjdk.java.net/browse/JDK-8175383
        throw ConstantPool.classFormatError(String.format("Unknown constant tag %s [in class file %s]", badConstantSeen, classfile));
    }
    verifyClassFlags(classFlags, majorVersion);
    // this class
    int thisKlassIndex = stream.readU2();
    Symbol<Name> thisKlassName = pool.classAt(thisKlassIndex).getName(pool);
    final boolean isInterface = Modifier.isInterface(classFlags);
    // TODO(peterssen): Verify class names.
    Symbol<Type> thisKlassType = context.getTypes().fromName(thisKlassName);
    if (Types.isPrimitive(thisKlassType) || Types.isArray(thisKlassType)) {
        throw ConstantPool.classFormatError(".this_class cannot be array nor primitive " + classType);
    }
    // Update classType which could be null previously to reflect the name in the constant pool.
    classType = thisKlassType;
    // Checks if name in class file matches requested name
    if (requestedClassType != null && !classDefinitionInfo.isHidden() && !requestedClassType.equals(classType)) {
        throw ConstantPool.noClassDefFoundError(classType + " (wrong name: " + requestedClassType + ")");
    }
    Symbol<Type> superKlass = parseSuperKlass();
    if (!Type.java_lang_Object.equals(classType) && superKlass == null) {
        throw ConstantPool.classFormatError("Class " + classType + " must have a superclass");
    }
    if (isInterface && !Type.java_lang_Object.equals(superKlass)) {
        throw ConstantPool.classFormatError("Interface " + classType + " must extend java.lang.Object");
    }
    Symbol<Type>[] superInterfaces;
    try (DebugCloseable closeable = PARSE_INTERFACES.scope(context.getTimers())) {
        superInterfaces = parseInterfaces();
    }
    final ParserField[] fields;
    try (DebugCloseable closeable = PARSE_FIELD.scope(context.getTimers())) {
        fields = parseFields(isInterface);
    }
    final ParserMethod[] methods;
    try (DebugCloseable closeable = PARSE_METHODS.scope(context.getTimers())) {
        methods = parseMethods(isInterface);
    }
    final Attribute[] attributes;
    try (DebugCloseable closeable = PARSE_CLASSATTR.scope(context.getTimers())) {
        attributes = parseClassAttributes();
    }
    // Ensure there are no trailing bytes
    stream.checkEndOfFile();
    if (classDefinitionInfo.isHidden()) {
        assert requestedClassType != null;
        int futureKlassID = context.getNewKlassId();
        classDefinitionInfo.initKlassID(futureKlassID);
        thisKlassName = context.getNames().getOrCreate(Types.hiddenClassName(requestedClassType, futureKlassID));
        thisKlassType = context.getTypes().fromName(thisKlassName);
        pool = pool.patchForHiddenClass(thisKlassIndex, thisKlassName);
    }
    return new ParserKlass(pool, classDefinitionInfo.patchFlags(classFlags), thisKlassName, thisKlassType, superKlass, superInterfaces, methods, fields, attributes, thisKlassIndex);
}