jlahoda@2164: /*
jlahoda@2164:  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
jlahoda@2164:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
jlahoda@2164:  *
jlahoda@2164:  * This code is free software; you can redistribute it and/or modify it
jlahoda@2164:  * under the terms of the GNU General Public License version 2 only, as
jlahoda@2164:  * published by the Free Software Foundation.  Oracle designates this
jlahoda@2164:  * particular file as subject to the "Classpath" exception as provided
jlahoda@2164:  * by Oracle in the LICENSE file that accompanied this code.
jlahoda@2164:  *
jlahoda@2164:  * This code is distributed in the hope that it will be useful, but WITHOUT
jlahoda@2164:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
jlahoda@2164:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
jlahoda@2164:  * version 2 for more details (a copy is included in the LICENSE file that
jlahoda@2164:  * accompanied this code).
jlahoda@2164:  *
jlahoda@2164:  * You should have received a copy of the GNU General Public License version
jlahoda@2164:  * 2 along with this work; if not, write to the Free Software Foundation,
jlahoda@2164:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
jlahoda@2164:  *
jlahoda@2164:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
jlahoda@2164:  * or visit www.oracle.com if you need additional information or have any
jlahoda@2164:  * questions.
jlahoda@2164:  */
jlahoda@2164: 
jlahoda@2164: /*
jlahoda@2164:  * @test
jlahoda@2164:  * @bug 8019486
jlahoda@2164:  * @summary javac, generates erroneous LVT for a test case with lambda code
jlahoda@2164:  * @library /tools/javac/lib
jlahoda@2164:  * @build ToolBox
jlahoda@2164:  * @run main WrongLVTForLambdaTest
jlahoda@2164:  */
jlahoda@2164: 
jlahoda@2164: import java.io.File;
jlahoda@2164: import java.nio.file.Paths;
jlahoda@2164: 
jlahoda@2164: import com.sun.tools.classfile.ClassFile;
jlahoda@2164: import com.sun.tools.classfile.Code_attribute;
jlahoda@2164: import com.sun.tools.classfile.LineNumberTable_attribute;
jlahoda@2164: import com.sun.tools.classfile.Method;
jlahoda@2164: import com.sun.tools.javac.util.Assert;
jlahoda@2164: 
jlahoda@2164: public class WrongLVTForLambdaTest {
jlahoda@2164: 
jlahoda@2164:     static final String testSource =
jlahoda@2164:     /* 01 */        "import java.util.List;\n" +
jlahoda@2164:     /* 02 */        "import java.util.Arrays;\n" +
jlahoda@2164:     /* 03 */        "import java.util.stream.Collectors;\n" +
jlahoda@2164:     /* 04 */        "\n" +
jlahoda@2164:     /* 05 */        "public class Foo {\n" +
jlahoda@2164:     /* 06 */        "    void bar(int value) {\n" +
jlahoda@2164:     /* 07 */        "        final List<Integer> numbers = Arrays.asList(1, 2, 3);\n" +
jlahoda@2164:     /* 08 */        "        final List<Integer> numbersPlusOne = \n" +
jlahoda@2164:     /* 09 */        "             numbers.stream().map(number -> number / 1).collect(Collectors.toList());\n" +
jlahoda@2164:     /* 10 */        "    }\n" +
jlahoda@2164:     /* 11 */        "}";
jlahoda@2164: 
jlahoda@2164:     static final int[][] expectedLNT = {
jlahoda@2164:     //  {line-number, start-pc},
jlahoda@2164:         {9,           0},       //number -> number / 1
jlahoda@2164:     };
jlahoda@2164: 
jlahoda@2164:     public static void main(String[] args) throws Exception {
jlahoda@2164:         new WrongLVTForLambdaTest().run();
jlahoda@2164:     }
jlahoda@2164: 
jlahoda@2164:     void run() throws Exception {
jlahoda@2164:         compileTestClass();
jlahoda@2164:         checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
jlahoda@2164:                 "Foo.class").toUri()));
jlahoda@2164:     }
jlahoda@2164: 
jlahoda@2164:     void compileTestClass() throws Exception {
jlahoda@2164:         ToolBox.JavaToolArgs javacSuccessArgs =
jlahoda@2164:                 new ToolBox.JavaToolArgs().setSources(testSource);
jlahoda@2164:         ToolBox.javac(javacSuccessArgs);
jlahoda@2164:     }
jlahoda@2164: 
jlahoda@2164:     void checkClassFile(final File cfile) throws Exception {
jlahoda@2164:         ClassFile classFile = ClassFile.read(cfile);
jlahoda@2164:         int methodsFound = 0;
jlahoda@2164:         for (Method method : classFile.methods) {
jlahoda@2164:             if (method.getName(classFile.constant_pool).startsWith("lambda$")) {
jlahoda@2164:                 ++methodsFound;
jlahoda@2164:                 Code_attribute code = (Code_attribute) method.attributes.get("Code");
jlahoda@2164:                 LineNumberTable_attribute lnt =
jlahoda@2164:                         (LineNumberTable_attribute) code.attributes.get("LineNumberTable");
jlahoda@2164:                 Assert.check(lnt.line_number_table_length == expectedLNT.length,
jlahoda@2164:                         "The LineNumberTable found has a length different to the expected one");
jlahoda@2164:                 int i = 0;
jlahoda@2164:                 for (LineNumberTable_attribute.Entry entry: lnt.line_number_table) {
jlahoda@2164:                     Assert.check(entry.line_number == expectedLNT[i][0] &&
jlahoda@2164:                             entry.start_pc == expectedLNT[i][1],
jlahoda@2164:                             "LNT entry at pos " + i + " differ from expected." +
jlahoda@2164:                             "Found " + entry.line_number + ":" + entry.start_pc +
jlahoda@2164:                             ". Expected " + expectedLNT[i][0] + ":" + expectedLNT[i][1]);
jlahoda@2164:                     i++;
jlahoda@2164:                 }
jlahoda@2164:             }
jlahoda@2164:         }
jlahoda@2164:         Assert.check(methodsFound == 1, "Expected to find one lambda method, found " + methodsFound);
jlahoda@2164:     }
jlahoda@2164: 
jlahoda@2164:     void error(String msg) {
jlahoda@2164:         throw new AssertionError(msg);
jlahoda@2164:     }
jlahoda@2164: 
jlahoda@2164: }