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11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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13  * accompanied this code).
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23 
24 /*
25  * @test 6716452
26  * @summary need a method to get an index of an attribute
27  * @modules jdk.jdeps/com.sun.tools.classfile
28  */
29 
30 import java.io.*;
31 import com.sun.tools.classfile.*;
32 
33 public class T6716452 {
main(String[] args)34     public static void main(String[] args) throws Exception {
35         new T6716452().run();
36     }
37 
run()38     public void run() throws Exception {
39         File javaFile = writeTestFile();
40         File classFile = compileTestFile(javaFile);
41 
42         ClassFile cf = ClassFile.read(classFile);
43         for (Method m: cf.methods) {
44             test(cf, m);
45         }
46 
47         if (errors > 0)
48             throw new Exception(errors + " errors found");
49     }
50 
test(ClassFile cf, Method m)51     void test(ClassFile cf, Method m) {
52         test(cf, m, Attribute.Code, Code_attribute.class);
53         test(cf, m, Attribute.Exceptions, Exceptions_attribute.class);
54     }
55 
56     // test the result of Attributes.getIndex according to expectations
57     // encoded in the method's name
test(ClassFile cf, Method m, String name, Class<?> c)58     void test(ClassFile cf, Method m, String name, Class<?> c) {
59         int index = m.attributes.getIndex(cf.constant_pool, name);
60         try {
61             String m_name = m.getName(cf.constant_pool);
62             System.err.println("Method " + m_name + " name:" + name + " index:" + index + " class: " + c);
63             boolean expect = (m_name.equals("<init>") && name.equals("Code"))
64                 || (m_name.indexOf(name) != -1);
65             boolean found = (index != -1);
66             if (expect) {
67                 if (found) {
68                     Attribute attr = m.attributes.get(index);
69                     if (!c.isAssignableFrom(attr.getClass())) {
70                         error(m + ": unexpected attribute found,"
71                               + " expected " + c.getName()
72                               + " found " + attr.getClass().getName());
73                     }
74                 } else {
75                     error(m + ": expected attribute " + name + " not found");
76                 }
77             } else {
78                 if (found) {
79                     error(m + ": unexpected attribute " + name);
80                 }
81             }
82         } catch (ConstantPoolException e) {
83             error(m + ": " + e);
84         }
85     }
86 
writeTestFile()87     File writeTestFile() throws IOException {
88         File f = new File("Test.java");
89         PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(f)));
90         out.println("abstract class Test { ");
91         out.println("  abstract void m();");
92         out.println("  void m_Code() { }");
93         out.println("  abstract void m_Exceptions() throws Exception;");
94         out.println("  void m_Code_Exceptions() throws Exception { }");
95         out.println("}");
96         out.close();
97         return f;
98     }
99 
compileTestFile(File f)100     File compileTestFile(File f) {
101         int rc = com.sun.tools.javac.Main.compile(new String[] { "-g", f.getPath() });
102         if (rc != 0)
103             throw new Error("compilation failed. rc=" + rc);
104         String path = f.getPath();
105         return new File(path.substring(0, path.length() - 5) + ".class");
106     }
107 
error(String msg)108     void error(String msg) {
109         System.err.println("error: " + msg);
110         errors++;
111     }
112 
113     int errors;
114 }
115