| /* |
| * Copyright (c) 2015, 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. |
| * |
| * 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. |
| */ |
| |
| /* |
| * @test |
| * @bug 8077605 |
| * @summary Check that when an exception occurs during Attr.visitLambda, an attempt to attribute |
| * the lambda again is avoided rather than falling into an infinite recursion. |
| * @modules jdk.compiler/com.sun.tools.javac.api |
| * jdk.compiler/com.sun.tools.javac.comp |
| * jdk.compiler/com.sun.tools.javac.tree |
| * jdk.compiler/com.sun.tools.javac.util |
| */ |
| |
| import java.io.IOException; |
| import java.net.URI; |
| import java.util.Arrays; |
| import java.util.List; |
| import javax.tools.JavaFileObject; |
| import javax.tools.SimpleJavaFileObject; |
| |
| import com.sun.tools.javac.api.JavacTaskImpl; |
| import com.sun.tools.javac.api.JavacTool; |
| import com.sun.tools.javac.comp.Attr; |
| import com.sun.tools.javac.tree.JCTree.JCVariableDecl; |
| import com.sun.tools.javac.util.Context; |
| import com.sun.tools.javac.util.Context.Factory; |
| |
| public class AvoidInfiniteReattribution { |
| |
| public static void main(String... args) throws Exception { |
| new AvoidInfiniteReattribution().run(); |
| } |
| |
| void run() throws IOException { |
| JavacTool tool = JavacTool.create(); |
| JavaSource source = new JavaSource("class Test {" + |
| " I i = STOP -> {};" + |
| " interface I {" + |
| " public void test(int i) {}" + |
| " }" + |
| "}"); |
| Context context = new Context(); |
| CrashingAttr.preRegister(context); |
| List<JavaSource> inputs = Arrays.asList(source); |
| JavacTaskImpl task = |
| (JavacTaskImpl) tool.getTask(null, null, null, null, null, inputs, context); |
| try { |
| task.analyze(null); |
| throw new AssertionError("Expected exception not seen."); |
| } catch (StopException ex) { |
| //ok |
| } |
| } |
| |
| static class CrashingAttr extends Attr { |
| |
| static void preRegister(Context context) { |
| context.put(attrKey, (Factory<Attr>) c -> new CrashingAttr(c)); |
| } |
| |
| CrashingAttr(Context context) { |
| super(context); |
| } |
| |
| @Override public void visitVarDef(JCVariableDecl tree) { |
| if (tree.name.contentEquals("STOP")) |
| throw new StopException(); |
| super.visitVarDef(tree); |
| } |
| } |
| |
| static class StopException extends NullPointerException {} |
| |
| class JavaSource extends SimpleJavaFileObject { |
| |
| String source; |
| |
| JavaSource(String source) { |
| super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE); |
| this.source = source; |
| } |
| |
| @Override |
| public CharSequence getCharContent(boolean ignoreEncodingErrors) { |
| return source; |
| } |
| |
| } |
| |
| } |