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Truffle is a multi-language framework for executing dynamic languages
that achieves high performance when combined with Graal.
/*
* Copyright (c) 2020, 2020, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* The Universal Permissive License (UPL), Version 1.0
*
* Subject to the condition set forth below, permission is hereby granted to any
* person obtaining a copy of this software, associated documentation and/or
* data (collectively the "Software"), free of charge and under any and all
* copyright rights in the Software, and any and all patent rights owned or
* freely licensable by each licensor hereunder covering either (i) the
* unmodified Software as contributed to or provided by such licensor, or (ii)
* the Larger Works (as defined below), to deal in both
*
* (a) the Software, and
*
* (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
* one is included with the Software each a "Larger Work" to which the Software
* is contributed by such licensors),
*
* without restriction, including without limitation the rights to copy, create
* derivative works of, display, perform, and distribute the Software and make,
* use, sell, offer for sale, import, export, have made, and have sold the
* Software and the Larger Work(s), and to sublicense the foregoing rights on
* either these or other terms.
*
* This license is subject to the following condition:
*
* The above copyright notice and either this complete permission notice or at a
* minimum a reference to the UPL must be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* SOFTWARE.
*/
package com.oracle.truffle.api.interop;
import java.util.Collections;
import java.util.Iterator;
import com.oracle.truffle.api.CompilerAsserts;
import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.TruffleLanguage;
import com.oracle.truffle.api.frame.Frame;
import com.oracle.truffle.api.library.ExportLibrary;
import com.oracle.truffle.api.library.ExportMessage;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.api.nodes.RootNode;
/**
* Default implementation of {@link NodeLibrary}.
*/
@SuppressWarnings("deprecation")
@ExportLibrary(value = NodeLibrary.class, receiverType = Node.class)
final class LegacyNodeExports {
@ExportMessage
@TruffleBoundary
static boolean hasScope(Node node, Frame frame) {
Iterator scopes = findLocalScopes(node, frame).iterator();
if (!scopes.hasNext()) {
return false;
}
return InteropAccessor.ACCESSOR.engineSupport().legacyScopesHasScope(node, scopes);
}
@ExportMessage
@TruffleBoundary
@SuppressWarnings("unchecked")
static Object getScope(Node node, Frame frame, @SuppressWarnings("unused") boolean nodeEnter) throws UnsupportedMessageException {
Iterator scopes = findLocalScopes(node, frame).iterator();
if (!scopes.hasNext()) {
throw UnsupportedMessageException.create();
}
TruffleLanguage.Env env = findEnv(node);
TruffleLanguage spi = InteropAccessor.ACCESSOR.languageSupport().getLanguage(env);
Object scope = InteropAccessor.ACCESSOR.engineSupport().legacyScopes2ScopeObject(node, scopes, (Class>) spi.getClass());
if (scope == null) {
throw UnsupportedMessageException.create();
}
return scope;
}
@ExportMessage
@TruffleBoundary
static boolean hasReceiverMember(Node node, Frame frame) {
Iterable scopes = findLocalScopes(node, frame);
for (com.oracle.truffle.api.Scope scope : scopes) {
String name = scope.getReceiverName();
if (name != null) {
return true;
}
}
return false;
}
@ExportMessage
@TruffleBoundary
static String getReceiverMember(Node node, Frame frame) throws UnsupportedMessageException {
Iterable scopes = findLocalScopes(node, frame);
for (com.oracle.truffle.api.Scope scope : scopes) {
String name = scope.getReceiverName();
if (name != null) {
return name;
}
}
throw UnsupportedMessageException.create();
}
@ExportMessage
@TruffleBoundary
static boolean hasRootInstance(Node node, Frame frame) {
Iterable scopes = findLocalScopes(node, frame);
for (com.oracle.truffle.api.Scope scope : scopes) {
Object instance = scope.getRootInstance();
if (instance != null) {
return true;
}
}
return false;
}
@ExportMessage
@TruffleBoundary
static Object getRootInstance(Node node, Frame frame) throws UnsupportedMessageException {
Iterable scopes = findLocalScopes(node, frame);
for (com.oracle.truffle.api.Scope scope : scopes) {
Object instance = scope.getRootInstance();
if (instance != null) {
return instance;
}
}
throw UnsupportedMessageException.create();
}
@ExportMessage
@TruffleBoundary
static Object getView(Node node, Frame frame, Object value) {
TruffleLanguage.Env env = findEnv(node);
if (env == null) {
return value;
} else {
return InteropAccessor.ACCESSOR.languageSupport().getLegacyScopedView(env, node, frame, value);
}
}
private static Iterable findLocalScopes(Node node, Frame frame) {
CompilerAsserts.neverPartOfCompilation();
TruffleLanguage.Env env = findEnv(node);
if (env == null) {
return Collections.emptyList();
} else {
return InteropAccessor.ACCESSOR.languageSupport().findLegacyLocalScopes(env, node, frame);
}
}
private static TruffleLanguage.Env findEnv(Node node) {
CompilerAsserts.neverPartOfCompilation();
RootNode root = node.getRootNode();
if (root == null || root.getLanguageInfo() == null) {
return null;
}
return InteropAccessor.ACCESSOR.engineSupport().getEnvForInstrument(root.getLanguageInfo());
}
static int findScopeCount(Iterable scopes) {
Iterator it = scopes.iterator();
int count = 0;
while (it.hasNext()) {
count++;
it.next();
}
return count;
}
static com.oracle.truffle.api.Scope findScope(Iterable scopes, int scopeNumber) {
Iterator it = scopes.iterator();
int count = 0;
while (it.hasNext()) {
com.oracle.truffle.api.Scope scope = it.next();
if (count == scopeNumber) {
return scope;
}
count++;
}
throw new AssertionError("wrong scope number: " + scopeNumber);
}
}