DebugPointerAtBadPositionTest.java revision 2942:08092deced3f 
1/*
2 * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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).
14 *
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.
18 *
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
21 * questions.
22 */
23
24/*
25 * @test
26 * @bug 6970173
27 * @summary Debug pointer at bad position
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.file
32 *          jdk.compiler/com.sun.tools.javac.main
33 *          jdk.compiler/com.sun.tools.javac.util
34 * @build ToolBox
35 * @run main DebugPointerAtBadPositionTest
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
47public class DebugPointerAtBadPositionTest {
48
49    static final String testSource =
50            "public class AssertionTest {\n" +
51            "    void lookForThisMethod() {\n" +
52            "        int i;\n" +
53            "        i = 33;\n" +
54            "        assert // line 5\n" +
55            "            i < 89:\n" +
56            "        i < 100; // line 7\n" +
57            "    }\n" +
58            "}";
59
60    static final int[][] expectedLNT = {
61        {4, 0},
62        {5, 3},
63        {8, 34}
64    };
65
66    static final String methodToLookFor = "lookForThisMethod";
67    static final String seekMethodNotFoundMsg =
68        "The seek method was not found";
69    static final String foundLNTLengthDifferentThanExpMsg =
70        "The LineNumberTable found has a length different to the expected one";
71
72    public static void main(String[] args) throws Exception {
73        new DebugPointerAtBadPositionTest().run();
74    }
75
76    void run() throws Exception {
77        compileTestClass();
78        checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
79                "AssertionTest.class").toUri()), methodToLookFor);
80    }
81
82    void compileTestClass() throws Exception {
83        ToolBox tb = new ToolBox();
84        tb.new JavacTask()
85                .sources(testSource)
86                .run();
87    }
88
89    void checkClassFile(final File cfile, String methodToFind) throws Exception {
90        ClassFile classFile = ClassFile.read(cfile);
91        boolean methodFound = false;
92        for (Method method : classFile.methods) {
93            if (method.getName(classFile.constant_pool).equals(methodToFind)) {
94                methodFound = true;
95                Code_attribute code = (Code_attribute) method.attributes.get("Code");
96                LineNumberTable_attribute lnt =
97                        (LineNumberTable_attribute) code.attributes.get("LineNumberTable");
98                Assert.check(lnt.line_number_table_length == expectedLNT.length,
99                        foundLNTLengthDifferentThanExpMsg);
100                int i = 0;
101                for (LineNumberTable_attribute.Entry entry: lnt.line_number_table) {
102                    Assert.check(entry.line_number == expectedLNT[i][0] &&
103                            entry.start_pc == expectedLNT[i][1],
104                            "LNT entry at pos " + i + " differ from expected." +
105                            "Found " + entry.line_number + ":" + entry.start_pc +
106                            ". Expected " + expectedLNT[i][0] + ":" + expectedLNT[i][1]);
107                    i++;
108                }
109            }
110        }
111        Assert.check(methodFound, seekMethodNotFoundMsg);
112    }
113
114    void error(String msg) {
115        throw new AssertionError(msg);
116    }
117
118}
119