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Truffle is a multi-language framework for executing dynamic languages
that achieves high performance when combined with Graal.
/*
* Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.oracle.truffle.api.vm;
import org.graalvm.polyglot.Value;
import org.graalvm.polyglot.proxy.Proxy;
import org.graalvm.polyglot.proxy.ProxyArray;
import org.graalvm.polyglot.proxy.ProxyExecutable;
import org.graalvm.polyglot.proxy.ProxyInstantiable;
import org.graalvm.polyglot.proxy.ProxyNativeObject;
import org.graalvm.polyglot.proxy.ProxyObject;
import com.oracle.truffle.api.CallTarget;
import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.Truffle;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.interop.ForeignAccess;
import com.oracle.truffle.api.interop.ForeignAccess.StandardFactory;
import com.oracle.truffle.api.interop.InteropException;
import com.oracle.truffle.api.interop.KeyInfo;
import com.oracle.truffle.api.interop.Message;
import com.oracle.truffle.api.interop.TruffleObject;
import com.oracle.truffle.api.interop.UnknownIdentifierException;
import com.oracle.truffle.api.interop.UnsupportedMessageException;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.api.nodes.RootNode;
@SuppressWarnings("deprecation")
final class PolyglotProxy {
public static boolean isProxyGuestObject(TruffleObject value) {
return value instanceof EngineProxy;
}
public static Proxy toProxyHostObject(TruffleObject value) {
return ((EngineProxy) value).proxy;
}
public static TruffleObject toProxyGuestObject(PolyglotLanguageContext context, Proxy receiver) {
return new EngineProxy(context, receiver);
}
private static class EngineProxy implements TruffleObject {
final PolyglotLanguageContext languageContext;
final Proxy proxy;
EngineProxy(PolyglotLanguageContext context, Proxy proxy) {
this.languageContext = context;
this.proxy = proxy;
}
public ForeignAccess getForeignAccess() {
return EngineProxyFactory.INSTANCE;
}
}
private abstract static class ProxyRootNode extends RootNode {
protected ProxyRootNode() {
super(null);
}
@CompilationFinal boolean seenException = false;
@Override
public Object execute(VirtualFrame frame) {
Object[] arguments = frame.getArguments();
EngineProxy proxy = (EngineProxy) arguments[0];
PolyglotLanguageContext context = proxy.languageContext;
try {
return executeProxy(context, proxy.proxy, arguments);
} catch (Throwable t) {
if (!seenException) {
CompilerDirectives.transferToInterpreterAndInvalidate();
seenException = true;
}
throw PolyglotImpl.wrapHostException(context, t);
}
}
abstract Object executeProxy(PolyglotLanguageContext context, Proxy proxy, Object[] arguments);
}
private static final class ProxyNewNode extends ProxyRootNode {
@Override
@TruffleBoundary
Object executeProxy(PolyglotLanguageContext context, Proxy proxy, Object[] arguments) {
if (proxy instanceof ProxyInstantiable) {
return context.toGuestValue(((ProxyInstantiable) proxy).newInstance(context.toHostValues(arguments, 1)));
} else {
throw UnsupportedMessageException.raise(Message.createNew(0));
}
}
}
private static final class ProxyIsInstantiableNode extends ProxyRootNode {
@Override
Object executeProxy(PolyglotLanguageContext context, Proxy proxy, Object[] arguments) {
return proxy instanceof ProxyInstantiable;
}
}
private static final class ProxyExecuteNode extends ProxyRootNode {
@Override
@TruffleBoundary
Object executeProxy(PolyglotLanguageContext context, Proxy proxy, Object[] arguments) {
if (proxy instanceof ProxyExecutable) {
return context.toGuestValue(((ProxyExecutable) proxy).execute(context.toHostValues(arguments, 1)));
} else {
throw UnsupportedMessageException.raise(Message.createExecute(0));
}
}
}
private static final class ProxyIsExecutableNode extends ProxyRootNode {
@Override
Object executeProxy(PolyglotLanguageContext context, Proxy proxy, Object[] arguments) {
return proxy instanceof ProxyExecutable;
}
}
private static final class ProxyIsPointerNode extends ProxyRootNode {
@Override
Object executeProxy(PolyglotLanguageContext context, Proxy proxy, Object[] arguments) {
return proxy instanceof ProxyNativeObject;
}
}
private static final class ProxyAsPointerNode extends ProxyRootNode {
@Override
@TruffleBoundary
Object executeProxy(PolyglotLanguageContext context, Proxy proxy, Object[] arguments) {
if (proxy instanceof ProxyNativeObject) {
return ((ProxyNativeObject) proxy).asPointer();
} else {
throw UnsupportedMessageException.raise(Message.AS_POINTER);
}
}
}
private static final class ProxyIsBoxedNode extends ProxyRootNode {
@Override
Object executeProxy(PolyglotLanguageContext context, Proxy proxy, Object[] arguments) {
return proxy instanceof org.graalvm.polyglot.proxy.ProxyPrimitive;
}
}
private static final class ProxyUnboxNode extends ProxyRootNode {
@Override
@TruffleBoundary
Object executeProxy(PolyglotLanguageContext context, Proxy proxy, Object[] arguments) {
if (proxy instanceof org.graalvm.polyglot.proxy.ProxyPrimitive) {
Object primitive = ((org.graalvm.polyglot.proxy.ProxyPrimitive) proxy).asPrimitive();
if (primitive instanceof String || primitive instanceof Boolean || //
primitive instanceof Character || primitive instanceof Byte || primitive instanceof Short ||
primitive instanceof Integer || primitive instanceof Long || primitive instanceof Float || primitive instanceof Double) {
return primitive;
} else {
throw new IllegalStateException(String.format("Invalid return value for %s. Only Java primitive values or String is allowed as return value fo asPrimitive().",
org.graalvm.polyglot.proxy.ProxyPrimitive.class.getSimpleName()));
}
} else {
throw UnsupportedMessageException.raise(Message.UNBOX);
}
}
}
private static final class ProxyHasSizeNode extends ProxyRootNode {
@Override
Object executeProxy(PolyglotLanguageContext context, Proxy proxy, Object[] arguments) {
return proxy instanceof ProxyArray;
}
}
private static final class ProxyGetSizeNode extends ProxyRootNode {
@Override
@TruffleBoundary
Object executeProxy(PolyglotLanguageContext context, Proxy proxy, Object[] arguments) {
if (proxy instanceof ProxyArray) {
return (int) ((ProxyArray) proxy).getSize();
} else {
throw UnsupportedMessageException.raise(Message.GET_SIZE);
}
}
}
private static final class ProxyHasKeysNode extends ProxyRootNode {
@Override
Object executeProxy(PolyglotLanguageContext context, Proxy proxy, Object[] arguments) {
return proxy instanceof ProxyObject;
}
}
private static final class ProxyKeysNode extends ProxyRootNode {
@Child private Node hasSize = Message.HAS_SIZE.createNode();
private static final ProxyArray EMPTY = new ProxyArray() {
public void set(long index, Value value) {
throw new ArrayIndexOutOfBoundsException();
}
public long getSize() {
return 0;
}
public Object get(long index) {
throw new ArrayIndexOutOfBoundsException();
}
};
@Override
@TruffleBoundary
Object executeProxy(PolyglotLanguageContext context, Proxy proxy, Object[] arguments) {
Object result;
if (proxy instanceof ProxyObject) {
final ProxyObject object = (ProxyObject) proxy;
result = object.getMemberKeys();
if (result == null) {
result = EMPTY;
}
} else {
result = EMPTY;
}
Object guestValue = context.toGuestValue(result);
if (!(guestValue instanceof TruffleObject) || !ForeignAccess.sendHasSize(hasSize, (TruffleObject) guestValue)) {
throw PolyglotImpl.wrapHostException(context, new IllegalStateException(
String.format("getMemberKeys() returned invalid value %s but must return an array of member key Strings.",
context.toHostValue(guestValue).toString())));
}
return guestValue;
}
}
private static final class ProxyKeyInfoNode extends ProxyRootNode {
static final Integer KEY = KeyInfo.READABLE | KeyInfo.MODIFIABLE | KeyInfo.REMOVABLE;
@Override
Object executeProxy(PolyglotLanguageContext context, Proxy proxy, Object[] arguments) {
if (arguments.length >= 2) {
Object key = arguments[1];
if (proxy instanceof ProxyObject && key instanceof String) {
return keyInfo((ProxyObject) proxy, (String) key);
} else if (proxy instanceof ProxyArray && key instanceof Number) {
return keyInfo((ProxyArray) proxy, (Number) key);
}
}
return KeyInfo.NONE;
}
@TruffleBoundary
private static Integer keyInfo(ProxyArray proxy, Number key) {
long size = proxy.getSize();
long index = key.longValue();
if (index >= 0 && index < size) {
return KEY;
} else {
return KeyInfo.INSERTABLE;
}
}
@TruffleBoundary
private static Integer keyInfo(ProxyObject proxy, String key) {
if (proxy.hasMember(key)) {
return KEY;
} else {
return KeyInfo.INSERTABLE;
}
}
}
private static final class ProxyInvokeNode extends ProxyRootNode {
@Override
Object executeProxy(PolyglotLanguageContext context, Proxy proxy, Object[] arguments) {
if (arguments.length >= 2) {
Object key = arguments[1];
if (proxy instanceof ProxyObject && key instanceof String) {
return invoke(context, (ProxyObject) proxy, (String) key, arguments);
}
}
CompilerDirectives.transferToInterpreter();
throw UnsupportedMessageException.raise(Message.createInvoke(0));
}
@Child private Node isExecutable = Message.IS_EXECUTABLE.createNode();
@Child private Node executeNode = Message.createExecute(0).createNode();
@TruffleBoundary
Object invoke(PolyglotLanguageContext context, ProxyObject object, String key, Object[] arguments) {
if (object.hasMember(key)) {
Object member = context.toGuestValue(object.getMember(key));
if (member instanceof TruffleObject && ForeignAccess.sendIsExecutable(isExecutable, (TruffleObject) member)) {
try {
return ForeignAccess.sendExecute(executeNode, ((TruffleObject) member), copyFromStart(arguments, 2));
} catch (InteropException e) {
throw e.raise();
}
} else {
throw UnknownIdentifierException.raise(key);
}
} else {
throw UnknownIdentifierException.raise(key);
}
}
}
private static Object[] copyFromStart(Object[] arguments, int startIndex) {
Object[] newArguments = new Object[arguments.length - startIndex];
for (int i = startIndex; i < arguments.length; i++) {
newArguments[i - startIndex] = arguments[i];
}
return newArguments;
}
private static final class ProxyWriteNode extends ProxyRootNode {
@Override
Object executeProxy(PolyglotLanguageContext context, Proxy proxy, Object[] arguments) {
if (arguments.length >= 3) {
Object key = arguments[1];
Object value = arguments[2];
if (proxy instanceof ProxyArray && key instanceof Number) {
setArray(context, (ProxyArray) proxy, (Number) key, value);
return value;
} else if (proxy instanceof ProxyObject && key instanceof String) {
putMember(context, (ProxyObject) proxy, (String) key, value);
return value;
}
}
CompilerDirectives.transferToInterpreter();
throw UnsupportedMessageException.raise(Message.WRITE);
}
@TruffleBoundary
static void putMember(PolyglotLanguageContext context, ProxyObject object, String key, Object value) {
try {
object.putMember(key, context.toHostValue(value));
} catch (UnsupportedOperationException e) {
throw UnsupportedMessageException.raise(Message.WRITE);
}
}
@TruffleBoundary
static void setArray(PolyglotLanguageContext context, ProxyArray object, Number index, Object value) {
Value castValue = context.toHostValue(value);
try {
object.set(index.longValue(), castValue);
} catch (ArrayIndexOutOfBoundsException e) {
throw UnknownIdentifierException.raise(e.getMessage());
} catch (UnsupportedOperationException e) {
throw UnsupportedMessageException.raise(Message.READ);
}
}
}
private static final class ProxyReadNode extends ProxyRootNode {
@Override
Object executeProxy(PolyglotLanguageContext context, Proxy proxy, Object[] arguments) {
if (arguments.length >= 2) {
Object key = arguments[1];
if (proxy instanceof ProxyArray && key instanceof Number) {
return getArray(context, (ProxyArray) proxy, (Number) key);
} else if (proxy instanceof ProxyObject && key instanceof String) {
return getMember(context, (ProxyObject) proxy, (String) key);
}
}
CompilerDirectives.transferToInterpreter();
throw UnsupportedMessageException.raise(Message.READ);
}
@TruffleBoundary
static Object getMember(PolyglotLanguageContext context, ProxyObject object, String key) {
if (object.hasMember(key)) {
try {
return context.toGuestValue(object.getMember(key));
} catch (UnsupportedOperationException e) {
throw UnsupportedMessageException.raise(Message.READ);
}
} else {
throw UnknownIdentifierException.raise(key);
}
}
@TruffleBoundary
static Object getArray(PolyglotLanguageContext context, ProxyArray object, Number index) {
Object result;
try {
result = object.get(index.longValue());
} catch (ArrayIndexOutOfBoundsException e) {
throw UnknownIdentifierException.raise(e.getMessage());
} catch (UnsupportedOperationException e) {
throw UnsupportedMessageException.raise(Message.READ);
}
return context.toGuestValue(result);
}
}
private static final class ProxyRemoveNode extends ProxyRootNode {
@Override
Object executeProxy(PolyglotLanguageContext context, Proxy proxy, Object[] arguments) {
if (arguments.length >= 2) {
Object key = arguments[1];
if (proxy instanceof ProxyArray && key instanceof Number) {
return removeArrayElement((ProxyArray) proxy, (Number) key);
} else if (proxy instanceof ProxyObject && key instanceof String) {
return removeMember((ProxyObject) proxy, (String) key);
}
}
CompilerDirectives.transferToInterpreter();
throw UnsupportedMessageException.raise(Message.READ);
}
@TruffleBoundary
static boolean removeMember(ProxyObject object, String key) {
if (object.hasMember(key)) {
try {
return object.removeMember(key);
} catch (UnsupportedOperationException e) {
throw UnsupportedMessageException.raise(Message.READ);
}
} else {
throw UnknownIdentifierException.raise(key);
}
}
@TruffleBoundary
static boolean removeArrayElement(ProxyArray object, Number index) {
boolean result;
try {
result = object.remove(index.longValue());
} catch (ArrayIndexOutOfBoundsException e) {
throw UnknownIdentifierException.raise(e.getMessage());
} catch (UnsupportedOperationException e) {
throw UnsupportedMessageException.raise(Message.READ);
}
return result;
}
}
private static final class EngineProxyFactory implements StandardFactory {
private static final ForeignAccess INSTANCE = ForeignAccess.create(EngineProxy.class, new EngineProxyFactory());
@Override
public CallTarget accessWrite() {
return Truffle.getRuntime().createCallTarget(new ProxyWriteNode());
}
@Override
public CallTarget accessIsBoxed() {
return Truffle.getRuntime().createCallTarget(new ProxyIsBoxedNode());
}
@Override
public CallTarget accessUnbox() {
return Truffle.getRuntime().createCallTarget(new ProxyUnboxNode());
}
@Override
public CallTarget accessRead() {
return Truffle.getRuntime().createCallTarget(new ProxyReadNode());
}
@Override
public CallTarget accessRemove() {
return Truffle.getRuntime().createCallTarget(new ProxyRemoveNode());
}
@Override
public CallTarget accessIsInstantiable() {
return Truffle.getRuntime().createCallTarget(new ProxyIsInstantiableNode());
}
@Override
public CallTarget accessNew(int argumentsLength) {
return Truffle.getRuntime().createCallTarget(new ProxyNewNode());
}
@Override
public CallTarget accessHasKeys() {
return Truffle.getRuntime().createCallTarget(new ProxyHasKeysNode());
}
@Override
public CallTarget accessKeys() {
return Truffle.getRuntime().createCallTarget(new ProxyKeysNode());
}
@Override
public CallTarget accessKeyInfo() {
return Truffle.getRuntime().createCallTarget(new ProxyKeyInfoNode());
}
@Override
public CallTarget accessIsNull() {
return Truffle.getRuntime().createCallTarget(RootNode.createConstantNode(false));
}
@Override
public CallTarget accessIsExecutable() {
return Truffle.getRuntime().createCallTarget(new ProxyIsExecutableNode());
}
@Override
public CallTarget accessInvoke(int argumentsLength) {
return Truffle.getRuntime().createCallTarget(new ProxyInvokeNode());
}
@Override
public CallTarget accessHasSize() {
return Truffle.getRuntime().createCallTarget(new ProxyHasSizeNode());
}
@Override
public CallTarget accessGetSize() {
return Truffle.getRuntime().createCallTarget(new ProxyGetSizeNode());
}
@Override
public CallTarget accessExecute(int argumentsLength) {
return Truffle.getRuntime().createCallTarget(new ProxyExecuteNode());
}
@Override
public CallTarget accessIsPointer() {
return Truffle.getRuntime().createCallTarget(new ProxyIsPointerNode());
}
@Override
public CallTarget accessAsPointer() {
return Truffle.getRuntime().createCallTarget(new ProxyAsPointerNode());
}
@Override
public CallTarget accessToNative() {
return null;
}
@Override
public CallTarget accessMessage(Message unknown) {
return null;
}
}
}
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