| /* |
| * Copyright (c) 2013, 2016, 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 |
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| * published by the Free Software Foundation. |
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| * 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 |
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| * |
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| */ |
| |
| /* |
| * @test |
| * @bug 8019486 8026861 8027142 |
| * @summary javac, generates erroneous LVT for a test case with lambda code |
| * @library /tools/lib |
| * @modules jdk.compiler/com.sun.tools.javac.api |
| * jdk.compiler/com.sun.tools.javac.main |
| * jdk.compiler/com.sun.tools.javac.util |
| * jdk.jdeps/com.sun.tools.classfile |
| * @build toolbox.ToolBox toolbox.JavacTask |
| * @run main WrongLNTForLambdaTest |
| */ |
| |
| import java.io.File; |
| import java.nio.file.Paths; |
| |
| import com.sun.tools.classfile.ClassFile; |
| import com.sun.tools.classfile.Code_attribute; |
| import com.sun.tools.classfile.LineNumberTable_attribute; |
| import com.sun.tools.classfile.Method; |
| import com.sun.tools.javac.util.Assert; |
| |
| import toolbox.JavacTask; |
| import toolbox.ToolBox; |
| |
| public class WrongLNTForLambdaTest { |
| |
| static final String testSource = |
| /* 01 */ "import java.util.List;\n" + |
| /* 02 */ "import java.util.Arrays;\n" + |
| /* 03 */ "import java.util.stream.Collectors;\n" + |
| /* 04 */ "\n" + |
| /* 05 */ "public class Foo {\n" + |
| /* 06 */ " void bar(int value) {\n" + |
| /* 07 */ " final List<Integer> numbers = Arrays.asList(1, 2, 3);\n" + |
| /* 08 */ " final List<Integer> numbersPlusOne = \n" + |
| /* 09 */ " numbers.stream().map(number -> number / 1).collect(Collectors.toList());\n" + |
| /* 10 */ " }\n" + |
| /* 11 */ " void variablesInLambdas(int value) {\n" + |
| /* 12 */ " Runnable r1 = () -> {\n" + |
| /* 13 */ " int i = value;\n" + |
| /* 14 */ " class FooBar<T extends CharSequence> {\n" + |
| /* 15 */ " public void run() {\n" + |
| /* 16 */ " T t = null;\n" + |
| /* 17 */ " }\n" + |
| /* 18 */ " }\n" + |
| /* 19 */ " };\n" + |
| /* 20 */ " Runnable r2 = () -> System.err.println(1);\n" + |
| /* 21 */ " Runnable r3 = (Runnable & java.io.Serializable) this::foo;\n" + |
| /* 22 */ " Runnable r4 = super :: notify;\n" + |
| /* 23 */ " }\n" + |
| /* 24 */ " private void foo() {}\n" + |
| /* 25 */ " void assignLambda() {\n" + |
| /* 26 */ " Runnable r = () -> { };\n" + |
| /* 27 */ " }\n" + |
| /* 28 */ " void callLambda(int i, Runnable r) {\n" + |
| /* 29 */ " callLambda(0,\n" + |
| /* 30 */ " () -> { });\n" + |
| /* 31 */ " }\n" + |
| /* 32 */ "}"; |
| |
| static final int[][] simpleLambdaExpectedLNT = { |
| // {line-number, start-pc}, |
| {9, 0}, //number -> number / 1 |
| }; |
| |
| static final int[][] lambdaWithVarsExpectedLNT = { |
| // {line-number, start-pc}, |
| {13, 0}, //number -> number / 1 |
| {19, 2}, //number -> number / 1 |
| }; |
| |
| static final int[][] insideLambdaWithVarsExpectedLNT = { |
| // {line-number, start-pc}, |
| {16, 0}, //number -> number / 1 |
| {17, 2}, //number -> number / 1 |
| }; |
| |
| static final int[][] lambdaVoid2VoidExpectedLNT = { |
| // {line-number, start-pc}, |
| {20, 0}, //number -> number / 1 |
| }; |
| |
| static final int[][] deserializeExpectedLNT = { |
| // {line-number, start-pc}, |
| {05, 0}, //number -> number / 1 |
| }; |
| |
| static final int[][] lambdaBridgeExpectedLNT = { |
| // {line-number, start-pc}, |
| {22, 0}, //number -> number / 1 |
| }; |
| |
| static final int[][] assignmentExpectedLNT = { |
| // {line-number, start-pc}, |
| {26, 0}, //number -> number / 1 |
| {27, 6}, //number -> number / 1 |
| }; |
| |
| static final int[][] callExpectedLNT = { |
| // {line-number, start-pc}, |
| {29, 0}, //number -> number / 1 |
| {31, 10}, //number -> number / 1 |
| }; |
| |
| public static void main(String[] args) throws Exception { |
| new WrongLNTForLambdaTest().run(); |
| } |
| |
| ToolBox tb = new ToolBox(); |
| |
| void run() throws Exception { |
| compileTestClass(); |
| checkClassFile(new File(Paths.get(System.getProperty("user.dir"), |
| "Foo.class").toUri()), "lambda$bar$0", simpleLambdaExpectedLNT); |
| checkClassFile(new File(Paths.get(System.getProperty("user.dir"), |
| "Foo.class").toUri()), "lambda$variablesInLambdas$1", lambdaWithVarsExpectedLNT); |
| checkClassFile(new File(Paths.get(System.getProperty("user.dir"), |
| "Foo$1FooBar.class").toUri()), "run", insideLambdaWithVarsExpectedLNT); |
| checkClassFile(new File(Paths.get(System.getProperty("user.dir"), |
| "Foo.class").toUri()), "lambda$variablesInLambdas$2", lambdaVoid2VoidExpectedLNT); |
| checkClassFile(new File(Paths.get(System.getProperty("user.dir"), |
| "Foo.class").toUri()), "$deserializeLambda$", deserializeExpectedLNT); |
| checkClassFile(new File(Paths.get(System.getProperty("user.dir"), |
| "Foo.class").toUri()), "lambda$variablesInLambdas$3", lambdaBridgeExpectedLNT); |
| checkClassFile(new File(Paths.get(System.getProperty("user.dir"), |
| "Foo.class").toUri()), "assignLambda", assignmentExpectedLNT); |
| checkClassFile(new File(Paths.get(System.getProperty("user.dir"), |
| "Foo.class").toUri()), "callLambda", callExpectedLNT); |
| } |
| |
| void compileTestClass() throws Exception { |
| new JavacTask(tb) |
| .sources(testSource) |
| .run(); |
| } |
| |
| void checkClassFile(final File cfile, String methodToFind, int[][] expectedLNT) throws Exception { |
| ClassFile classFile = ClassFile.read(cfile); |
| boolean methodFound = false; |
| for (Method method : classFile.methods) { |
| if (method.getName(classFile.constant_pool).equals(methodToFind)) { |
| methodFound = true; |
| Code_attribute code = (Code_attribute) method.attributes.get("Code"); |
| LineNumberTable_attribute lnt = |
| (LineNumberTable_attribute) code.attributes.get("LineNumberTable"); |
| Assert.check(lnt.line_number_table_length == expectedLNT.length, |
| "The LineNumberTable found has a length different to the expected one"); |
| int i = 0; |
| for (LineNumberTable_attribute.Entry entry: lnt.line_number_table) { |
| Assert.check(entry.line_number == expectedLNT[i][0] && |
| entry.start_pc == expectedLNT[i][1], |
| "LNT entry at pos " + i + " differ from expected." + |
| "Found " + entry.line_number + ":" + entry.start_pc + |
| ". Expected " + expectedLNT[i][0] + ":" + expectedLNT[i][1]); |
| i++; |
| } |
| } |
| } |
| Assert.check(methodFound, "The seek method was not found"); |
| } |
| |
| void error(String msg) { |
| throw new AssertionError(msg); |
| } |
| |
| } |