1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/test/tools/javac/T8019486/WrongLVTForLambdaTest.java Wed Oct 23 23:02:17 2013 +0200
1.3 @@ -0,0 +1,109 @@
1.4 +/*
1.5 + * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +/*
1.30 + * @test
1.31 + * @bug 8019486
1.32 + * @summary javac, generates erroneous LVT for a test case with lambda code
1.33 + * @library /tools/javac/lib
1.34 + * @build ToolBox
1.35 + * @run main WrongLVTForLambdaTest
1.36 + */
1.37 +
1.38 +import java.io.File;
1.39 +import java.nio.file.Paths;
1.40 +
1.41 +import com.sun.tools.classfile.ClassFile;
1.42 +import com.sun.tools.classfile.Code_attribute;
1.43 +import com.sun.tools.classfile.LineNumberTable_attribute;
1.44 +import com.sun.tools.classfile.Method;
1.45 +import com.sun.tools.javac.util.Assert;
1.46 +
1.47 +public class WrongLVTForLambdaTest {
1.48 +
1.49 + static final String testSource =
1.50 + /* 01 */ "import java.util.List;\n" +
1.51 + /* 02 */ "import java.util.Arrays;\n" +
1.52 + /* 03 */ "import java.util.stream.Collectors;\n" +
1.53 + /* 04 */ "\n" +
1.54 + /* 05 */ "public class Foo {\n" +
1.55 + /* 06 */ " void bar(int value) {\n" +
1.56 + /* 07 */ " final List<Integer> numbers = Arrays.asList(1, 2, 3);\n" +
1.57 + /* 08 */ " final List<Integer> numbersPlusOne = \n" +
1.58 + /* 09 */ " numbers.stream().map(number -> number / 1).collect(Collectors.toList());\n" +
1.59 + /* 10 */ " }\n" +
1.60 + /* 11 */ "}";
1.61 +
1.62 + static final int[][] expectedLNT = {
1.63 + // {line-number, start-pc},
1.64 + {9, 0}, //number -> number / 1
1.65 + };
1.66 +
1.67 + public static void main(String[] args) throws Exception {
1.68 + new WrongLVTForLambdaTest().run();
1.69 + }
1.70 +
1.71 + void run() throws Exception {
1.72 + compileTestClass();
1.73 + checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
1.74 + "Foo.class").toUri()));
1.75 + }
1.76 +
1.77 + void compileTestClass() throws Exception {
1.78 + ToolBox.JavaToolArgs javacSuccessArgs =
1.79 + new ToolBox.JavaToolArgs().setSources(testSource);
1.80 + ToolBox.javac(javacSuccessArgs);
1.81 + }
1.82 +
1.83 + void checkClassFile(final File cfile) throws Exception {
1.84 + ClassFile classFile = ClassFile.read(cfile);
1.85 + int methodsFound = 0;
1.86 + for (Method method : classFile.methods) {
1.87 + if (method.getName(classFile.constant_pool).startsWith("lambda$")) {
1.88 + ++methodsFound;
1.89 + Code_attribute code = (Code_attribute) method.attributes.get("Code");
1.90 + LineNumberTable_attribute lnt =
1.91 + (LineNumberTable_attribute) code.attributes.get("LineNumberTable");
1.92 + Assert.check(lnt.line_number_table_length == expectedLNT.length,
1.93 + "The LineNumberTable found has a length different to the expected one");
1.94 + int i = 0;
1.95 + for (LineNumberTable_attribute.Entry entry: lnt.line_number_table) {
1.96 + Assert.check(entry.line_number == expectedLNT[i][0] &&
1.97 + entry.start_pc == expectedLNT[i][1],
1.98 + "LNT entry at pos " + i + " differ from expected." +
1.99 + "Found " + entry.line_number + ":" + entry.start_pc +
1.100 + ". Expected " + expectedLNT[i][0] + ":" + expectedLNT[i][1]);
1.101 + i++;
1.102 + }
1.103 + }
1.104 + }
1.105 + Assert.check(methodsFound == 1, "Expected to find one lambda method, found " + methodsFound);
1.106 + }
1.107 +
1.108 + void error(String msg) {
1.109 + throw new AssertionError(msg);
1.110 + }
1.111 +
1.112 +}
