InlinedFinallyConfuseDebuggersTest.java revision 4177:f52e81f886fb 
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1198184Sgordon * 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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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.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23
24/*
25 * @test
26 * @bug 7008643
27 * @summary inlined finally clauses confuse debuggers
28 * @library /tools/lib
29 * @modules jdk.jdeps/com.sun.tools.classfile
30 *          jdk.compiler/com.sun.tools.javac.api
31 *          jdk.compiler/com.sun.tools.javac.main
32 *          jdk.compiler/com.sun.tools.javac.util
33 *          jdk.jdeps/com.sun.tools.javap
34 * @build toolbox.ToolBox toolbox.JavacTask
35 * @run main InlinedFinallyConfuseDebuggersTest
36 */
37
38import java.io.File;
39import java.nio.file.Paths;
40
41import com.sun.tools.classfile.ClassFile;
42import com.sun.tools.classfile.Code_attribute;
43import com.sun.tools.classfile.LineNumberTable_attribute;
44import com.sun.tools.classfile.Method;
45import com.sun.tools.javac.util.Assert;
46
47import toolbox.JavacTask;
48import toolbox.ToolBox;
49
50public class InlinedFinallyConfuseDebuggersTest {
51
52    static final String testSource =
53    /* 01 */        "public class InlinedFinallyTest {\n" +
54    /* 02 */        "    void lookForThisMethod(int value) {\n" +
55    /* 03 */        "        try {\n" +
56    /* 04 */        "            if (value > 0) {\n" +
57    /* 05 */        "                System.out.println(\"if\");\n" +
58    /* 06 */        "                return;\n" +
59    /* 07 */        "            }\n" +
60    /* 08 */        "        } finally {\n" +
61    /* 09 */        "            System.out.println(\"finally\");\n" +
62    /* 10 */        "        }\n" +
63    /* 11 */        "    }\n" +
64    /* 12 */        "}";
65
66    static final int[][] expectedLNT = {
67    //  {line-number, start-pc},
68        {4,           0},       //if (value > 0) {
69        {5,           4},       //    System.out.println("if");
70        {9,           12},      //System.out.println("finally");
71        {6,           20},      //    return;
72        {9,           21},      //System.out.println("finally");
73        {10,          29},
74        {9,           32},      //System.out.println("finally");
75        {10,          41},      //}
76        {11,          43},
77    };
78
79    static final String methodToLookFor = "lookForThisMethod";
80
81    public static void main(String[] args) throws Exception {
82        new InlinedFinallyConfuseDebuggersTest().run();
83    }
84
85    ToolBox tb = new ToolBox();
86
87    void run() throws Exception {
88        compileTestClass();
89        checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
90                "InlinedFinallyTest.class").toUri()), methodToLookFor);
91    }
92
93    void compileTestClass() throws Exception {
94        new JavacTask(tb)
95                .sources(testSource)
96                .run();
97    }
98
99    void checkClassFile(final File cfile, String methodToFind) throws Exception {
100        ClassFile classFile = ClassFile.read(cfile);
101        boolean methodFound = false;
102        for (Method method : classFile.methods) {
103            if (method.getName(classFile.constant_pool).equals(methodToFind)) {
104                methodFound = true;
105                Code_attribute code = (Code_attribute) method.attributes.get("Code");
106                LineNumberTable_attribute lnt =
107                        (LineNumberTable_attribute) code.attributes.get("LineNumberTable");
108                Assert.check(lnt.line_number_table_length == expectedLNT.length,
109                        "The LineNumberTable found has a length different to the expected one");
110                int i = 0;
111                for (LineNumberTable_attribute.Entry entry: lnt.line_number_table) {
112                    Assert.check(entry.line_number == expectedLNT[i][0] &&
113                            entry.start_pc == expectedLNT[i][1],
114                            "LNT entry at pos " + i + " differ from expected." +
115                            "Found " + entry.line_number + ":" + entry.start_pc +
116                            ". Expected " + expectedLNT[i][0] + ":" + expectedLNT[i][1]);
117                    i++;
118                }
119            }
120        }
121        Assert.check(methodFound, "The seek method was not found");
122    }
123
124    void error(String msg) {
125        throw new AssertionError(msg);
126    }
127
128}
129