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/*
* 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;
}
}
}
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