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comparison test/serviceability/jvmti/UnresolvedClassAgent.java @ 14648:4c76be9856fc

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8035150: ShouldNotReachHere() in ConstantPool::copy_entry_to Reviewed-by: dcubed, mgronlun
author sla
date Wed, 26 Feb 2014 15:47:44 +0100
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14482:5e7eb4244604 14648:4c76be9856fc
1 /*
2 * Copyright (c) 2014, 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 import java.io.DataInputStream;
25 import java.io.File;
26 import java.io.FileInputStream;
27 import java.lang.instrument.ClassDefinition;
28 import java.lang.instrument.Instrumentation;
29
30 /*
31 * This class is present during compilation, but will be deleted before execution.
32 */
33 class MyUnresolvedClass {
34 static void bar() {
35 }
36 }
37
38 class MyRedefinedClass {
39 static void foo() {
40 MyUnresolvedClass.bar();
41 }
42 }
43
44 public class UnresolvedClassAgent {
45 public static void main(String... args) {
46 }
47
48 public static void premain(String args, Instrumentation inst) throws Exception {
49 try {
50 MyRedefinedClass.foo();
51 } catch(NoClassDefFoundError err) {
52 System.out.println("NoClassDefFoundError (expected)");
53 }
54
55 File f = new File(System.getProperty("test.classes"), "MyRedefinedClass.class");
56 byte[] buf = new byte[(int)f.length()];
57 try (DataInputStream dis = new DataInputStream(new FileInputStream(f))) {
58 dis.readFully(buf);
59 }
60 ClassDefinition cd = new ClassDefinition(MyRedefinedClass.class, buf);
61 inst.redefineClasses(new ClassDefinition[] {cd});
62
63 try {
64 MyRedefinedClass.foo();
65 } catch(NoClassDefFoundError err) {
66 System.out.println("NoClassDefFoundError (expected again)");
67 }
68 }
69 }