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

Example 1 with NestMembersAttribute

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

the class ObjectKlass method getNestMembers.

@Override
public Klass[] getNestMembers() {
    if (this != nest()) {
        return nest().getNestMembers();
    }
    NestMembersAttribute nestMembers = (NestMembersAttribute) getAttribute(NestMembersAttribute.NAME);
    if (nestMembers == null || nestMembers.getClasses().length == 0) {
        return new Klass[] { nest() };
    }
    RuntimeConstantPool pool = getConstantPool();
    ArrayList<Klass> klasses = new ArrayList<>(1 + nestMembers.getClasses().length);
    klasses.add(nest());
    for (int i = 0; i < nestMembers.getClasses().length; i++) {
        int index = nestMembers.getClasses()[i];
        try {
            klasses.add(pool.resolvedKlassAt(this, index));
        } catch (EspressoException e) {
        /*
                 * Don't allow badly constructed nest members to break execution here, only report
                 * well-constructed entries.
                 */
        }
    }
    return klasses.toArray(Klass.EMPTY_ARRAY);
}

Example 2 with NestMembersAttribute

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

the class ObjectKlass method nestMembersCheck.

@Override
public boolean nestMembersCheck(Klass k) {
    NestMembersAttribute nestMembers = (NestMembersAttribute) getAttribute(NestMembersAttribute.NAME);
    if (nestMembers == null) {
        return false;
    }
    if (!this.sameRuntimePackage(k)) {
        return false;
    }
    RuntimeConstantPool pool = getConstantPool();
    for (int index : nestMembers.getClasses()) {
        if (k.getName().equals(pool.classAt(index).getName(pool))) {
            if (k == pool.resolvedKlassAt(this, index)) {
                return true;
            }
        }
    }
    return false;
}

Example 3 with NestMembersAttribute

use of com.oracle.truffle.espresso.classfile.attributes.NestMembersAttribute 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;
}