Examples with NestHostAttribute com.oracle.truffle.espresso.classfile.attributes.NestHostAttribute used on opensource projects

Example 1 with NestHostAttribute

use of com.oracle.truffle.espresso.classfile.attributes.NestHostAttribute in project graal by oracle.

the class ClassfileParser method parseClassAttributes.

private Attribute[] parseClassAttributes() {
    int attributeCount = stream.readU2();
    if (attributeCount == 0) {
        if (maxBootstrapMethodAttrIndex >= 0) {
            throw ConstantPool.classFormatError("BootstrapMethods attribute is missing");
        }
        return Attribute.EMPTY_ARRAY;
    }
    SourceFileAttribute sourceFileName = null;
    SourceDebugExtensionAttribute sourceDebugExtensionAttribute = null;
    NestHostAttribute nestHost = null;
    NestMembersAttribute nestMembers = null;
    EnclosingMethodAttribute enclosingMethod = null;
    BootstrapMethodsAttribute bootstrapMethods = null;
    InnerClassesAttribute innerClasses = null;
    PermittedSubclassesAttribute permittedSubclasses = null;
    RecordAttribute record = null;
    CommonAttributeParser commonAttributeParser = new CommonAttributeParser(InfoType.Class);
    final Attribute[] classAttributes = spawnAttributesArray(attributeCount);
    for (int i = 0; i < attributeCount; i++) {
        final int attributeNameIndex = stream.readU2();
        final Symbol<Name> attributeName = pool.symbolAt(attributeNameIndex, "attribute name");
        final int attributeSize = stream.readS4();
        final int startPosition = stream.getPosition();
        if (attributeName.equals(Name.SourceFile)) {
            if (sourceFileName != null) {
                throw ConstantPool.classFormatError("Duplicate SourceFile attribute");
            }
            classAttributes[i] = sourceFileName = parseSourceFileAttribute(attributeName);
        } else if (attributeName.equals(Name.SourceDebugExtension)) {
            if (sourceDebugExtensionAttribute != null) {
                throw ConstantPool.classFormatError("Duplicate SourceDebugExtension attribute");
            }
            classAttributes[i] = sourceDebugExtensionAttribute = parseSourceDebugExtensionAttribute(attributeName, attributeSize);
        } else if (attributeName.equals(Name.Synthetic)) {
            classFlags |= ACC_SYNTHETIC;
            classAttributes[i] = new Attribute(attributeName, null);
        } else if (attributeName.equals(Name.InnerClasses)) {
            if (innerClasses != null) {
                throw ConstantPool.classFormatError("Duplicate InnerClasses attribute");
            }
            classAttributes[i] = innerClasses = parseInnerClasses(attributeName);
        } else if (majorVersion >= JAVA_1_5_VERSION) {
            if (majorVersion >= JAVA_7_VERSION && attributeName.equals(Name.BootstrapMethods)) {
                if (bootstrapMethods != null) {
                    throw ConstantPool.classFormatError("Duplicate BootstrapMethods attribute");
                }
                classAttributes[i] = bootstrapMethods = parseBootstrapMethods(attributeName);
            } else if (attributeName.equals(Name.EnclosingMethod)) {
                if (enclosingMethod != null) {
                    throw ConstantPool.classFormatError("Duplicate EnclosingMethod attribute");
                }
                classAttributes[i] = enclosingMethod = parseEnclosingMethodAttribute(attributeName);
            } else if (majorVersion >= JAVA_11_VERSION && attributeName.equals(Name.NestHost)) {
                if (nestHost != null) {
                    throw ConstantPool.classFormatError("Duplicate NestHost attribute");
                }
                if (nestMembers != null) {
                    throw ConstantPool.classFormatError("Classfile cannot have both a nest members and a nest host attribute.");
                }
                if (attributeSize != 2) {
                    throw ConstantPool.classFormatError("Attribute length of NestHost must be 2");
                }
                classAttributes[i] = nestHost = parseNestHostAttribute(attributeName);
            } else if (majorVersion >= JAVA_11_VERSION && attributeName.equals(Name.NestMembers)) {
                if (nestMembers != null) {
                    throw ConstantPool.classFormatError("Duplicate NestMembers attribute");
                }
                if (nestHost != null) {
                    throw ConstantPool.classFormatError("Classfile cannot have both a nest members and a nest host attribute.");
                }
                classAttributes[i] = nestMembers = parseNestMembers(attributeName);
            } else if (majorVersion >= JAVA_14_VERSION && attributeName.equals(Name.Record)) {
                if (record != null) {
                    throw ConstantPool.classFormatError("Duplicate Record attribute");
                }
                classAttributes[i] = record = parseRecord(attributeName);
            } else if (majorVersion >= JAVA_17_VERSION && attributeName.equals(Name.PermittedSubclasses)) {
                if (permittedSubclasses != null) {
                    throw ConstantPool.classFormatError("Duplicate PermittedSubclasses attribute");
                }
                classAttributes[i] = permittedSubclasses = parsePermittedSubclasses(attributeName);
            } else {
                Attribute attr = commonAttributeParser.parseCommonAttribute(attributeName, attributeSize);
                // stream.skip(attributeSize);
                classAttributes[i] = attr == null ? new Attribute(attributeName, stream.readByteArray(attributeSize)) : attr;
            }
        } else {
            // stream.skip(attributeSize);
            classAttributes[i] = new Attribute(attributeName, stream.readByteArray(attributeSize));
        }
        if (attributeSize != stream.getPosition() - startPosition) {
            throw ConstantPool.classFormatError("Invalid attribute length for " + attributeName + " attribute");
        }
    }
    if (maxBootstrapMethodAttrIndex >= 0 && bootstrapMethods == null) {
        throw ConstantPool.classFormatError("BootstrapMethods attribute is missing");
    }
    return classAttributes;
}

Example 2 with NestHostAttribute

use of com.oracle.truffle.espresso.classfile.attributes.NestHostAttribute in project graal by oracle.

the class ObjectKlass method nest.

@Override
public Klass nest() {
    if (nest == null) {
        CompilerDirectives.transferToInterpreterAndInvalidate();
        NestHostAttribute nestHost = (NestHostAttribute) getAttribute(NestHostAttribute.NAME);
        if (nestHost == null) {
            nest = this;
        } else {
            RuntimeConstantPool thisPool = getConstantPool();
            Klass host = thisPool.resolvedKlassAt(this, nestHost.hostClassIndex);
            if (!host.nestMembersCheck(this)) {
                Meta meta = getMeta();
                throw meta.throwException(meta.java_lang_IncompatibleClassChangeError);
            }
            nest = host;
        }
    }
    return nest;
}