1/*
2 * Copyright (c) 2009, 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
24import java.io.*;
25import com.sun.tools.classfile.*;
26
27/*
28 * @test
29 * @bug 6843077
30 * @summary test that typecasts annotation are emitted if only the cast
31 *          expression is optimized away
32 * @modules jdk.jdeps/com.sun.tools.classfile
33 */
34
35public class TypeCasts {
36    public static void main(String[] args) throws Exception {
37        new TypeCasts().run();
38    }
39
40    public void run() throws Exception {
41        File javaFile = writeTestFile();
42        File classFile = compileTestFile(javaFile);
43
44        ClassFile cf = ClassFile.read(classFile);
45        for (Method m: cf.methods) {
46            test(cf, m);
47        }
48
49        countAnnotations();
50
51        if (errors > 0)
52            throw new Exception(errors + " errors found");
53        System.out.println("PASSED");
54    }
55
56    void test(ClassFile cf, Method m) {
57        test(cf, m, Attribute.RuntimeVisibleTypeAnnotations, true);
58        test(cf, m, Attribute.RuntimeInvisibleTypeAnnotations, false);
59    }
60
61
62    // test the result of Attributes.getIndex according to expectations
63    // encoded in the method's name
64    void test(ClassFile cf, Method m, String name, boolean visible) {
65        Attribute attr = null;
66        Code_attribute cAttr = null;
67
68        int index = m.attributes.getIndex(cf.constant_pool, Attribute.Code);
69        if(index!= -1) {
70            attr = m.attributes.get(index);
71            assert attr instanceof Code_attribute;
72            cAttr = (Code_attribute)attr;
73            index = cAttr.attributes.getIndex(cf.constant_pool, name);
74            if(index!= -1) {
75                attr = cAttr.attributes.get(index);
76                assert attr instanceof RuntimeTypeAnnotations_attribute;
77                RuntimeTypeAnnotations_attribute tAttr = (RuntimeTypeAnnotations_attribute)attr;
78                all += tAttr.annotations.length;
79                if (visible)
80                    visibles += tAttr.annotations.length;
81                else
82                    invisibles += tAttr.annotations.length;
83               }
84        }
85    }
86
87
88
89    File writeTestFile() throws IOException {
90        File f = new File("Test.java");
91        PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(f)));
92        out.println("import java.lang.annotation.*;");
93        out.println("class Test { ");
94        out.println("  @Target(ElementType.TYPE_USE) @interface A { }");
95
96        out.println("  void emit() {");
97        out.println("    Object o = null;");
98        out.println("    String s = null;");
99
100        out.println("    String a0 = (@A String)o;");
101        out.println("    Object a1 = (@A Object)o;");
102
103        out.println("    String b0 = (@A String)s;");
104        out.println("    Object b1 = (@A Object)s;");
105        out.println("  }");
106
107        out.println("  void alldeadcode() {");
108        out.println("    Object o = null;");
109
110        out.println("    if (false) {");
111        out.println("      String a0 = (@A String)o;");
112        out.println("    }");
113        out.println("  }");
114
115        out.println("}");
116        out.close();
117        return f;
118    }
119
120    File compileTestFile(File f) {
121        int rc = com.sun.tools.javac.Main.compile(new String[] {"-g", f.getPath() });
122        if (rc != 0)
123            throw new Error("compilation failed. rc=" + rc);
124        String path = f.getPath();
125        return new File(path.substring(0, path.length() - 5) + ".class");
126    }
127
128    void countAnnotations() {
129        int expected_visibles = 0, expected_invisibles = 4;
130        int expected_all = expected_visibles + expected_invisibles;
131
132        if (expected_all != all) {
133            errors++;
134            System.err.println("expected " + expected_all
135                    + " annotations but found " + all);
136        }
137
138        if (expected_visibles != visibles) {
139            errors++;
140            System.err.println("expected " + expected_visibles
141                    + " visibles annotations but found " + visibles);
142        }
143
144        if (expected_invisibles != invisibles) {
145            errors++;
146            System.err.println("expected " + expected_invisibles
147                    + " invisibles annotations but found " + invisibles);
148        }
149
150    }
151
152    int errors;
153    int all;
154    int visibles;
155    int invisibles;
156}
157