WrongLNTForLambdaTest.java revision 2942:08092deced3f 
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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25
26/*
27 * @test
28 * @bug 8019486 8026861 8027142
29 * @summary javac, generates erroneous LVT for a test case with lambda code
30 * @library /tools/lib
31 * @modules jdk.jdeps/com.sun.tools.classfile
32 *          jdk.compiler/com.sun.tools.javac.api
33 *          jdk.compiler/com.sun.tools.javac.file
34 *          jdk.compiler/com.sun.tools.javac.main
35 *          jdk.compiler/com.sun.tools.javac.util
36 * @build ToolBox
37 * @run main WrongLNTForLambdaTest
38 */
39
40import java.io.File;
41import java.nio.file.Paths;
42
43import com.sun.tools.classfile.ClassFile;
44import com.sun.tools.classfile.Code_attribute;
45import com.sun.tools.classfile.LineNumberTable_attribute;
46import com.sun.tools.classfile.Method;
47import com.sun.tools.javac.util.Assert;
48
49public class WrongLNTForLambdaTest {
50
51    static final String testSource =
52    /* 01 */        "import java.util.List;\n" +
53    /* 02 */        "import java.util.Arrays;\n" +
54    /* 03 */        "import java.util.stream.Collectors;\n" +
55    /* 04 */        "\n" +
56    /* 05 */        "public class Foo {\n" +
57    /* 06 */        "    void bar(int value) {\n" +
58    /* 07 */        "        final List<Integer> numbers = Arrays.asList(1, 2, 3);\n" +
59    /* 08 */        "        final List<Integer> numbersPlusOne = \n" +
60    /* 09 */        "             numbers.stream().map(number -> number / 1).collect(Collectors.toList());\n" +
61    /* 10 */        "    }\n" +
62    /* 11 */        "    void variablesInLambdas(int value) {\n" +
63    /* 12 */        "        Runnable r1 = () -> {\n" +
64    /* 13 */        "            int i  = value;\n" +
65    /* 14 */        "            class FooBar<T extends CharSequence> {\n" +
66    /* 15 */        "                public void run() {\n" +
67    /* 16 */        "                    T t = null;\n" +
68    /* 17 */        "                }\n" +
69    /* 18 */        "            }\n" +
70    /* 19 */        "        };\n" +
71    /* 20 */        "        Runnable r2 = () -> System.err.println(1);\n" +
72    /* 21 */        "        Runnable r3 = (Runnable & java.io.Serializable) this::foo;\n" +
73    /* 22 */        "        Runnable r4 = super :: notify;\n" +
74    /* 23 */        "    }\n" +
75    /* 24 */        "    private void foo() {}\n" +
76    /* 25 */        "    void assignLambda() {\n" +
77    /* 26 */        "        Runnable r = () -> { };\n" +
78    /* 27 */        "    }\n" +
79    /* 28 */        "    void callLambda(int i, Runnable r) {\n" +
80    /* 29 */        "        callLambda(0,\n" +
81    /* 30 */        "                   () -> { });\n" +
82    /* 31 */        "    }\n" +
83    /* 32 */        "}";
84
85    static final int[][] simpleLambdaExpectedLNT = {
86    //  {line-number, start-pc},
87        {9,           0},       //number -> number / 1
88    };
89
90    static final int[][] lambdaWithVarsExpectedLNT = {
91    //  {line-number, start-pc},
92        {13,           0},       //number -> number / 1
93        {19,           2},       //number -> number / 1
94    };
95
96    static final int[][] insideLambdaWithVarsExpectedLNT = {
97    //  {line-number, start-pc},
98        {16,           0},       //number -> number / 1
99        {17,           2},       //number -> number / 1
100    };
101
102    static final int[][] lambdaVoid2VoidExpectedLNT = {
103    //  {line-number, start-pc},
104        {20,           0},       //number -> number / 1
105    };
106
107    static final int[][] deserializeExpectedLNT = {
108    //  {line-number, start-pc},
109        {05,           0},       //number -> number / 1
110    };
111
112    static final int[][] lambdaBridgeExpectedLNT = {
113    //  {line-number, start-pc},
114        {22,           0},       //number -> number / 1
115    };
116
117    static final int[][] assignmentExpectedLNT = {
118    //  {line-number, start-pc},
119        {26,           0},       //number -> number / 1
120        {27,           6},       //number -> number / 1
121    };
122
123    static final int[][] callExpectedLNT = {
124    //  {line-number, start-pc},
125        {29,           0},       //number -> number / 1
126        {31,           10},       //number -> number / 1
127    };
128
129    public static void main(String[] args) throws Exception {
130        new WrongLNTForLambdaTest().run();
131    }
132
133    ToolBox tb = new ToolBox();
134
135    void run() throws Exception {
136        compileTestClass();
137        checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
138                "Foo.class").toUri()), "lambda$bar$0", simpleLambdaExpectedLNT);
139        checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
140                "Foo.class").toUri()), "lambda$variablesInLambdas$1", lambdaWithVarsExpectedLNT);
141        checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
142                "Foo$1FooBar.class").toUri()), "run", insideLambdaWithVarsExpectedLNT);
143        checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
144                "Foo.class").toUri()), "lambda$variablesInLambdas$2", lambdaVoid2VoidExpectedLNT);
145        checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
146                "Foo.class").toUri()), "$deserializeLambda$", deserializeExpectedLNT);
147        checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
148                "Foo.class").toUri()), "lambda$variablesInLambdas$3", lambdaBridgeExpectedLNT);
149        checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
150                "Foo.class").toUri()), "assignLambda", assignmentExpectedLNT);
151        checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
152                "Foo.class").toUri()), "callLambda", callExpectedLNT);
153    }
154
155    void compileTestClass() throws Exception {
156        tb.new JavacTask()
157                .sources(testSource)
158                .run();
159    }
160
161    void checkClassFile(final File cfile, String methodToFind, int[][] expectedLNT) throws Exception {
162        ClassFile classFile = ClassFile.read(cfile);
163        boolean methodFound = false;
164        for (Method method : classFile.methods) {
165            if (method.getName(classFile.constant_pool).equals(methodToFind)) {
166                methodFound = true;
167                Code_attribute code = (Code_attribute) method.attributes.get("Code");
168                LineNumberTable_attribute lnt =
169                        (LineNumberTable_attribute) code.attributes.get("LineNumberTable");
170                Assert.check(lnt.line_number_table_length == expectedLNT.length,
171                        "The LineNumberTable found has a length different to the expected one");
172                int i = 0;
173                for (LineNumberTable_attribute.Entry entry: lnt.line_number_table) {
174                    Assert.check(entry.line_number == expectedLNT[i][0] &&
175                            entry.start_pc == expectedLNT[i][1],
176                            "LNT entry at pos " + i + " differ from expected." +
177                            "Found " + entry.line_number + ":" + entry.start_pc +
178                            ". Expected " + expectedLNT[i][0] + ":" + expectedLNT[i][1]);
179                    i++;
180                }
181            }
182        }
183        Assert.check(methodFound, "The seek method was not found");
184    }
185
186    void error(String msg) {
187        throw new AssertionError(msg);
188    }
189
190}
191