116 lines
4.3 KiB
Java
116 lines
4.3 KiB
Java
/*
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* Copyright (c) 2018, Google Inc. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8190452
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* @summary javac should not add MethodParameters attributes to v51 and earlier class files
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* @modules jdk.jdeps/com.sun.tools.classfile
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* @build LegacyOutputTest
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* @run main LegacyOutputTest
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*/
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import com.sun.tools.classfile.ClassFile;
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import com.sun.tools.classfile.Method;
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import com.sun.tools.classfile.MethodParameters_attribute;
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import com.sun.tools.classfile.MethodParameters_attribute.Entry;
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import java.io.IOException;
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import java.net.URI;
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import java.nio.file.Paths;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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import javax.tools.JavaCompiler;
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import javax.tools.JavaCompiler.CompilationTask;
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import javax.tools.JavaFileObject;
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import javax.tools.JavaFileObject.Kind;
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import javax.tools.SimpleJavaFileObject;
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import javax.tools.ToolProvider;
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/**
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* Post https://bugs.openjdk.java.net/browse/JDK-8190452, the test verifies that MethodParameters
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* attributes are not emitted when targeting --release < 8.
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*/
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public class LegacyOutputTest {
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public static void main(String[] args) throws Exception {
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new LegacyOutputTest().test();
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}
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void test() throws Exception {
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release8();
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}
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void release8() throws Exception {
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List<String> names = getParameterNames("8");
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List<String> expected = Arrays.asList("x", "y");
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if (!names.equals(expected)) {
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throw new AssertionError(
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"incorrect parameter names, actual: " + names + ", expected: " + expected);
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}
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}
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List<String> getParameterNames(String release) throws Exception {
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JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
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JavaFileObject fileObject =
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new SimpleJavaFileObject(URI.create("Test.java"), Kind.SOURCE) {
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@Override
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public CharSequence getCharContent(boolean ignoreEncodingErrors)
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throws IOException {
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return "class Test { void f(int x, int y) {} }";
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}
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};
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CompilationTask task =
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tool.getTask(
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null,
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null,
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null,
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Arrays.asList("--release", release, "-parameters"),
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null,
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Arrays.asList(fileObject));
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if (!task.call()) {
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throw new AssertionError("compilation failed");
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}
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ClassFile classFile = ClassFile.read(Paths.get("Test.class"));
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Method method = getMethod(classFile, "f");
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MethodParameters_attribute attribute =
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(MethodParameters_attribute) method.attributes.get("MethodParameters");
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if (attribute == null) {
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return null;
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}
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List<String> parameterNames = new ArrayList<>();
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for (Entry e : attribute.method_parameter_table) {
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parameterNames.add(classFile.constant_pool.getUTF8Value(e.name_index));
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}
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return parameterNames;
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}
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private static Method getMethod(ClassFile classFile, String name) throws Exception {
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for (Method method : classFile.methods) {
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if (classFile.constant_pool.getUTF8Value(method.name_index).equals(name)) {
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return method;
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}
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}
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throw new AssertionError("could not find method: " + name);
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}
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}
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