WrongLNTForLambdaTest.java revision 3294:9adfb22ff08f 
1/*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 * This code is free software; you can redistribute it and/or modify it
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7 * published by the Free Software Foundation.
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
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15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
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22 */
23
24/*
25 * @test
26 * @bug 8019486 8026861 8027142
27 * @summary javac, generates erroneous LVT for a test case with lambda code
28 * @library /tools/lib
29 * @modules jdk.compiler/com.sun.tools.javac.api
30 *          jdk.compiler/com.sun.tools.javac.file
31 *          jdk.compiler/com.sun.tools.javac.main
32 *          jdk.compiler/com.sun.tools.javac.util
33 *          jdk.jdeps/com.sun.tools.classfile
34 *          jdk.jdeps/com.sun.tools.javap
35 * @build ToolBox
36 * @run main WrongLNTForLambdaTest
37 */
38
39import java.io.File;
40import java.nio.file.Paths;
41
42import com.sun.tools.classfile.ClassFile;
43import com.sun.tools.classfile.Code_attribute;
44import com.sun.tools.classfile.LineNumberTable_attribute;
45import com.sun.tools.classfile.Method;
46import com.sun.tools.javac.util.Assert;
47
48public class WrongLNTForLambdaTest {
49
50    static final String testSource =
51    /* 01 */        "import java.util.List;\n" +
52    /* 02 */        "import java.util.Arrays;\n" +
53    /* 03 */        "import java.util.stream.Collectors;\n" +
54    /* 04 */        "\n" +
55    /* 05 */        "public class Foo {\n" +
56    /* 06 */        "    void bar(int value) {\n" +
57    /* 07 */        "        final List<Integer> numbers = Arrays.asList(1, 2, 3);\n" +
58    /* 08 */        "        final List<Integer> numbersPlusOne = \n" +
59    /* 09 */        "             numbers.stream().map(number -> number / 1).collect(Collectors.toList());\n" +
60    /* 10 */        "    }\n" +
61    /* 11 */        "    void variablesInLambdas(int value) {\n" +
62    /* 12 */        "        Runnable r1 = () -> {\n" +
63    /* 13 */        "            int i  = value;\n" +
64    /* 14 */        "            class FooBar<T extends CharSequence> {\n" +
65    /* 15 */        "                public void run() {\n" +
66    /* 16 */        "                    T t = null;\n" +
67    /* 17 */        "                }\n" +
68    /* 18 */        "            }\n" +
69    /* 19 */        "        };\n" +
70    /* 20 */        "        Runnable r2 = () -> System.err.println(1);\n" +
71    /* 21 */        "        Runnable r3 = (Runnable & java.io.Serializable) this::foo;\n" +
72    /* 22 */        "        Runnable r4 = super :: notify;\n" +
73    /* 23 */        "    }\n" +
74    /* 24 */        "    private void foo() {}\n" +
75    /* 25 */        "    void assignLambda() {\n" +
76    /* 26 */        "        Runnable r = () -> { };\n" +
77    /* 27 */        "    }\n" +
78    /* 28 */        "    void callLambda(int i, Runnable r) {\n" +
79    /* 29 */        "        callLambda(0,\n" +
80    /* 30 */        "                   () -> { });\n" +
81    /* 31 */        "    }\n" +
82    /* 32 */        "}";
83
84    static final int[][] simpleLambdaExpectedLNT = {
85    //  {line-number, start-pc},
86        {9,           0},       //number -> number / 1
87    };
88
89    static final int[][] lambdaWithVarsExpectedLNT = {
90    //  {line-number, start-pc},
91        {13,           0},       //number -> number / 1
92        {19,           2},       //number -> number / 1
93    };
94
95    static final int[][] insideLambdaWithVarsExpectedLNT = {
96    //  {line-number, start-pc},
97        {16,           0},       //number -> number / 1
98        {17,           2},       //number -> number / 1
99    };
100
101    static final int[][] lambdaVoid2VoidExpectedLNT = {
102    //  {line-number, start-pc},
103        {20,           0},       //number -> number / 1
104    };
105
106    static final int[][] deserializeExpectedLNT = {
107    //  {line-number, start-pc},
108        {05,           0},       //number -> number / 1
109    };
110
111    static final int[][] lambdaBridgeExpectedLNT = {
112    //  {line-number, start-pc},
113        {22,           0},       //number -> number / 1
114    };
115
116    static final int[][] assignmentExpectedLNT = {
117    //  {line-number, start-pc},
118        {26,           0},       //number -> number / 1
119        {27,           6},       //number -> number / 1
120    };
121
122    static final int[][] callExpectedLNT = {
123    //  {line-number, start-pc},
124        {29,           0},       //number -> number / 1
125        {31,           10},       //number -> number / 1
126    };
127
128    public static void main(String[] args) throws Exception {
129        new WrongLNTForLambdaTest().run();
130    }
131
132    ToolBox tb = new ToolBox();
133
134    void run() throws Exception {
135        compileTestClass();
136        checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
137                "Foo.class").toUri()), "lambda$bar$0", simpleLambdaExpectedLNT);
138        checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
139                "Foo.class").toUri()), "lambda$variablesInLambdas$1", lambdaWithVarsExpectedLNT);
140        checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
141                "Foo$1FooBar.class").toUri()), "run", insideLambdaWithVarsExpectedLNT);
142        checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
143                "Foo.class").toUri()), "lambda$variablesInLambdas$2", lambdaVoid2VoidExpectedLNT);
144        checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
145                "Foo.class").toUri()), "$deserializeLambda$", deserializeExpectedLNT);
146        checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
147                "Foo.class").toUri()), "lambda$variablesInLambdas$3", lambdaBridgeExpectedLNT);
148        checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
149                "Foo.class").toUri()), "assignLambda", assignmentExpectedLNT);
150        checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
151                "Foo.class").toUri()), "callLambda", callExpectedLNT);
152    }
153
154    void compileTestClass() throws Exception {
155        tb.new JavacTask()
156                .sources(testSource)
157                .run();
158    }
159
160    void checkClassFile(final File cfile, String methodToFind, int[][] expectedLNT) throws Exception {
161        ClassFile classFile = ClassFile.read(cfile);
162        boolean methodFound = false;
163        for (Method method : classFile.methods) {
164            if (method.getName(classFile.constant_pool).equals(methodToFind)) {
165                methodFound = true;
166                Code_attribute code = (Code_attribute) method.attributes.get("Code");
167                LineNumberTable_attribute lnt =
168                        (LineNumberTable_attribute) code.attributes.get("LineNumberTable");
169                Assert.check(lnt.line_number_table_length == expectedLNT.length,
170                        "The LineNumberTable found has a length different to the expected one");
171                int i = 0;
172                for (LineNumberTable_attribute.Entry entry: lnt.line_number_table) {
173                    Assert.check(entry.line_number == expectedLNT[i][0] &&
174                            entry.start_pc == expectedLNT[i][1],
175                            "LNT entry at pos " + i + " differ from expected." +
176                            "Found " + entry.line_number + ":" + entry.start_pc +
177                            ". Expected " + expectedLNT[i][0] + ":" + expectedLNT[i][1]);
178                    i++;
179                }
180            }
181        }
182        Assert.check(methodFound, "The seek method was not found");
183    }
184
185    void error(String msg) {
186        throw new AssertionError(msg);
187    }
188
189}
190