Examples with Klass com.oracle.truffle.espresso.impl.Klass used on opensource projects

Example 41 with Klass

use of com.oracle.truffle.espresso.impl.Klass in project graal by oracle.

the class VM method computeEnclosingClass.

/**
 * Return the enclosing class; or null for: primitives, arrays, anonymous classes (declared
 * inside methods).
 */
private static Klass computeEnclosingClass(ObjectKlass klass) {
    InnerClassesAttribute innerClasses = (InnerClassesAttribute) klass.getAttribute(InnerClassesAttribute.NAME);
    if (innerClasses == null) {
        return null;
    }
    RuntimeConstantPool pool = klass.getConstantPool();
    boolean found = false;
    Klass outerKlass = null;
    for (InnerClassesAttribute.Entry entry : innerClasses.entries()) {
        if (entry.innerClassIndex != 0) {
            Symbol<Name> innerDescriptor = pool.classAt(entry.innerClassIndex).getName(pool);
            // Check decriptors/names before resolving.
            if (innerDescriptor.equals(klass.getName())) {
                Klass innerKlass = pool.resolvedKlassAt(klass, entry.innerClassIndex);
                found = (innerKlass == klass);
                if (found && entry.outerClassIndex != 0) {
                    outerKlass = pool.resolvedKlassAt(klass, entry.outerClassIndex);
                }
            }
        }
        if (found) {
            break;
        }
    }
    // the system could allow a spoof of an inner class to gain access rights.
    return outerKlass;
}

Example 42 with Klass

use of com.oracle.truffle.espresso.impl.Klass in project graal by oracle.

the class VM method JVM_GetDeclaredClasses.

@VmImpl(isJni = true)
@JavaType(Class[].class)
public StaticObject JVM_GetDeclaredClasses(@JavaType(Class.class) StaticObject self) {
    Meta meta = getMeta();
    Klass klass = self.getMirrorKlass();
    if (klass.isPrimitive() || klass.isArray()) {
        return meta.java_lang_Class.allocateReferenceArray(0);
    }
    ObjectKlass instanceKlass = (ObjectKlass) klass;
    InnerClassesAttribute innerClasses = (InnerClassesAttribute) instanceKlass.getAttribute(InnerClassesAttribute.NAME);
    if (innerClasses == null || innerClasses.entries().length == 0) {
        return meta.java_lang_Class.allocateReferenceArray(0);
    }
    RuntimeConstantPool pool = instanceKlass.getConstantPool();
    List<Klass> innerKlasses = new ArrayList<>();
    for (InnerClassesAttribute.Entry entry : innerClasses.entries()) {
        if (entry.innerClassIndex != 0 && entry.outerClassIndex != 0) {
            // Check to see if the name matches the class we're looking for
            // before attempting to find the class.
            Symbol<Name> outerDescriptor = pool.classAt(entry.outerClassIndex).getName(pool);
            // Check decriptors/names before resolving.
            if (outerDescriptor.equals(instanceKlass.getName())) {
                Klass outerKlass = pool.resolvedKlassAt(instanceKlass, entry.outerClassIndex);
                if (outerKlass == instanceKlass) {
                    Klass innerKlass = pool.resolvedKlassAt(instanceKlass, entry.innerClassIndex);
                    // HotSpot:
                    // Throws an exception if outer klass has not declared k as
                    // an inner klass
                    // Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
                    // TODO(peterssen): The check in HotSpot is redundant.
                    innerKlasses.add(innerKlass);
                }
            }
        }
    }
    return meta.java_lang_Class.allocateReferenceArray(innerKlasses.size(), new IntFunction<StaticObject>() {

        @Override
        public StaticObject apply(int index) {
            return innerKlasses.get(index).mirror();
        }
    });
}

Example 43 with Klass

use of com.oracle.truffle.espresso.impl.Klass in project graal by oracle.

the class StackWalk method synchronizedConstants.

private static boolean synchronizedConstants(Meta meta) {
    Klass stackStreamFactory = meta.java_lang_StackStreamFactory;
    StaticObject statics = stackStreamFactory.tryInitializeAndGetStatics();
    assert DEFAULT_MODE == getConstantField(stackStreamFactory, statics, STRING_DEFAULT_MODE, meta);
    assert FILL_CLASS_REFS_ONLY == getConstantField(stackStreamFactory, statics, STRING_FILL_CLASS_REFS_ONLY, meta);
    assert GET_CALLER_CLASS == getConstantField(stackStreamFactory, statics, STRING_GET_CALLER_CLASS, meta);
    assert SHOW_HIDDEN_FRAMES == getConstantField(stackStreamFactory, statics, STRING_SHOW_HIDDEN_FRAMES, meta);
    assert FILL_LIVE_STACK_FRAMES == getConstantField(stackStreamFactory, statics, STRING_FILL_LIVE_STACK_FRAMES, meta);
    return true;
}

Example 44 with Klass

use of com.oracle.truffle.espresso.impl.Klass in project graal by oracle.

the class VM method JVM_GetRecordComponents.

@VmImpl(isJni = true)
@TruffleBoundary
@JavaType(internalName = "[Ljava/lang/reflect/RecordComponent;")
public StaticObject JVM_GetRecordComponents(@JavaType(Class.class) StaticObject self) {
    Klass k = self.getMirrorKlass();
    if (!(k instanceof ObjectKlass)) {
        return StaticObject.NULL;
    }
    ObjectKlass klass = (ObjectKlass) k;
    RecordAttribute record = (RecordAttribute) klass.getAttribute(RecordAttribute.NAME);
    if (record == null) {
        return StaticObject.NULL;
    }
    RecordAttribute.RecordComponentInfo[] components = record.getComponents();
    return getMeta().java_lang_reflect_RecordComponent.allocateReferenceArray(components.length, (i) -> components[i].toGuestComponent(getMeta(), klass));
}

Example 45 with Klass

use of com.oracle.truffle.espresso.impl.Klass in project graal by oracle.

the class VM method JVM_GetClassDeclaredConstructors.

// TODO(tg): inject constructor calltarget.
@VmImpl(isJni = true)
@JavaType(Constructor[].class)
public StaticObject JVM_GetClassDeclaredConstructors(@JavaType(Class.class) StaticObject self, boolean publicOnly) {
    Meta meta = getMeta();
    ArrayList<Method> collectedMethods = new ArrayList<>();
    Klass klass = self.getMirrorKlass();
    klass.ensureLinked();
    for (Method m : klass.getDeclaredConstructors()) {
        if (Name._init_.equals(m.getName()) && (!publicOnly || m.isPublic())) {
            collectedMethods.add(m);
        }
    }
    final Method[] constructors = collectedMethods.toArray(Method.EMPTY_ARRAY);
    EspressoContext context = meta.getContext();
    // TODO(peterssen): Cache guest j.l.reflect.Constructor constructor.
    // Calling the constructor is just for validation, manually setting the fields would be
    // faster.
    Method constructorInit = meta.java_lang_reflect_Constructor.lookupDeclaredMethod(Name._init_, context.getSignatures().makeRaw(Type._void, /* declaringClass */
    Type.java_lang_Class, /* parameterTypes */
    Type.java_lang_Class_array, /* checkedExceptions */
    Type.java_lang_Class_array, /* modifiers */
    Type._int, /* slot */
    Type._int, /* signature */
    Type.java_lang_String, /* annotations */
    Type._byte_array, /* parameterAnnotations */
    Type._byte_array));
    StaticObject arr = meta.java_lang_reflect_Constructor.allocateReferenceArray(constructors.length, new IntFunction<StaticObject>() {

        @Override
        public StaticObject apply(int i) {
            final Method m = constructors[i];
            Attribute rawRuntimeVisibleAnnotations = m.getAttribute(Name.RuntimeVisibleAnnotations);
            StaticObject runtimeVisibleAnnotations = rawRuntimeVisibleAnnotations != null ? StaticObject.wrap(rawRuntimeVisibleAnnotations.getData(), meta) : StaticObject.NULL;
            Attribute rawRuntimeVisibleParameterAnnotations = m.getAttribute(Name.RuntimeVisibleParameterAnnotations);
            StaticObject runtimeVisibleParameterAnnotations = rawRuntimeVisibleParameterAnnotations != null ? StaticObject.wrap(rawRuntimeVisibleParameterAnnotations.getData(), meta) : StaticObject.NULL;
            Attribute rawRuntimeVisibleTypeAnnotations = m.getAttribute(Name.RuntimeVisibleTypeAnnotations);
            StaticObject runtimeVisibleTypeAnnotations = rawRuntimeVisibleTypeAnnotations != null ? StaticObject.wrap(rawRuntimeVisibleTypeAnnotations.getData(), meta) : StaticObject.NULL;
            final Klass[] rawParameterKlasses = m.resolveParameterKlasses();
            StaticObject parameterTypes = meta.java_lang_Class.allocateReferenceArray(m.getParameterCount(), new IntFunction<StaticObject>() {

                @Override
                public StaticObject apply(int j) {
                    return rawParameterKlasses[j].mirror();
                }
            });
            final Klass[] rawCheckedExceptions = m.getCheckedExceptions();
            StaticObject checkedExceptions = meta.java_lang_Class.allocateReferenceArray(rawCheckedExceptions.length, new IntFunction<StaticObject>() {

                @Override
                public StaticObject apply(int j) {
                    return rawCheckedExceptions[j].mirror();
                }
            });
            SignatureAttribute signatureAttribute = (SignatureAttribute) m.getAttribute(Name.Signature);
            StaticObject genericSignature = StaticObject.NULL;
            if (signatureAttribute != null) {
                String sig = m.getConstantPool().symbolAt(signatureAttribute.getSignatureIndex(), "signature").toString();
                genericSignature = meta.toGuestString(sig);
            }
            StaticObject instance = meta.java_lang_reflect_Constructor.allocateInstance();
            constructorInit.invokeDirect(/* this */
            instance, /* declaringKlass */
            m.getDeclaringKlass().mirror(), /* parameterTypes */
            parameterTypes, /* checkedExceptions */
            checkedExceptions, /* modifiers */
            m.getMethodModifiers(), // TODO(peterssen): Fill method slot.
            i, /* signature */
            genericSignature, /* annotations */
            runtimeVisibleAnnotations, /* parameterAnnotations */
            runtimeVisibleParameterAnnotations);
            meta.HIDDEN_CONSTRUCTOR_KEY.setHiddenObject(instance, m);
            meta.HIDDEN_CONSTRUCTOR_RUNTIME_VISIBLE_TYPE_ANNOTATIONS.setHiddenObject(instance, runtimeVisibleTypeAnnotations);
            return instance;
        }
    });
    return arr;
}