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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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  *
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20  * or visit www.oracle.com if you need additional information or have any
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23 
24 /*
25  * @test
26  * @summary Verifies the behaviour of Unsafe.defineClass
27  * @library /test/lib
28  * @modules java.base/jdk.internal.misc
29  *          java.compiler
30  *          java.management
31  * @run main DefineClass
32  */
33 
34 import java.security.ProtectionDomain;
35 
36 import jdk.test.lib.compiler.InMemoryJavaCompiler;
37 import jdk.internal.misc.Unsafe;
38 import static jdk.test.lib.Asserts.*;
39 
40 public class DefineClass {
main(String args[])41     public static void main(String args[]) throws Exception {
42         Unsafe unsafe = Unsafe.getUnsafe();
43         TestClassLoader classloader = new TestClassLoader();
44         ProtectionDomain pd = new ProtectionDomain(null, null);
45 
46         byte klassbuf[] = InMemoryJavaCompiler.compile("TestClass", "class TestClass { }");
47 
48         // Invalid class data
49         try {
50             unsafe.defineClass(null, klassbuf, 4, klassbuf.length - 4, classloader, pd);
51             throw new RuntimeException("defineClass did not throw expected ClassFormatError");
52         } catch (ClassFormatError e) {
53             // Expected
54         }
55 
56         // Negative offset
57         try {
58             unsafe.defineClass(null, klassbuf, -1, klassbuf.length, classloader, pd);
59             throw new RuntimeException("defineClass did not throw expected IndexOutOfBoundsException");
60         } catch (IndexOutOfBoundsException e) {
61             // Expected
62         }
63 
64         // Negative length
65         try {
66             unsafe.defineClass(null, klassbuf, 0, -1, classloader, pd);
67             throw new RuntimeException("defineClass did not throw expected IndexOutOfBoundsException");
68         } catch (IndexOutOfBoundsException e) {
69             // Expected
70         }
71 
72         // Offset greater than klassbuf.length
73         try {
74             unsafe.defineClass(null, klassbuf, klassbuf.length + 1, klassbuf.length, classloader, pd);
75             throw new RuntimeException("defineClass did not throw expected IndexOutOfBoundsException");
76         } catch (IndexOutOfBoundsException e) {
77             // Expected
78         }
79 
80         // Length greater than klassbuf.length
81         try {
82             unsafe.defineClass(null, klassbuf, 0, klassbuf.length + 1, classloader, pd);
83             throw new RuntimeException("defineClass did not throw expected IndexOutOfBoundsException");
84         } catch (IndexOutOfBoundsException e) {
85             // Expected
86         }
87 
88         Class klass = unsafe.defineClass(null, klassbuf, 0, klassbuf.length, classloader, pd);
89         assertEquals(klass.getClassLoader(), classloader);
90         assertEquals(klass.getProtectionDomain(), pd);
91     }
92 
93     private static class TestClassLoader extends ClassLoader {
TestClassLoader(ClassLoader parent)94         public TestClassLoader(ClassLoader parent) {
95             super(parent);
96         }
97 
TestClassLoader()98         public TestClassLoader() {
99             super();
100         }
101     }
102 }
103