Mercurial > hg > graal-jvmci-8
comparison test/runtime/8003720/VictimClassLoader.java @ 7179:d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
Summary: Pass down a closure during root scanning to keep the class of the method alive.
Reviewed-by: coleenp, jcoomes
author | stefank |
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date | Tue, 27 Nov 2012 10:13:20 +0100 |
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7178:19c1bd641922 | 7179:d0aa87f04bd5 |
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1 /* | |
2 * Copyright (c) 2012, 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 public class VictimClassLoader extends ClassLoader { | |
26 public static long counter = 0; | |
27 | |
28 private int which = (int) ++counter; | |
29 | |
30 protected VictimClassLoader() { | |
31 super(VictimClassLoader.class.getClassLoader()); | |
32 } | |
33 | |
34 protected Class loadClass(String name, boolean resolve) throws ClassNotFoundException { | |
35 Class c; | |
36 if (!name.endsWith("Victim")) { | |
37 c = super.loadClass(name, resolve); | |
38 return c; | |
39 } | |
40 | |
41 c = findLoadedClass(name); | |
42 if (c != null) { | |
43 return c; | |
44 } | |
45 | |
46 byte[] buf = readClassFile(name); | |
47 c = defineClass(name, buf, 0, buf.length); | |
48 resolveClass(c); | |
49 | |
50 if (c.getClassLoader() != this) { | |
51 throw new AssertionError(); | |
52 } | |
53 | |
54 Test8003720.println("loaded " + c + "#" + System.identityHashCode(c) + " in " + c.getClassLoader()); | |
55 return c; | |
56 } | |
57 | |
58 static byte[] readClassFile(String name) { | |
59 try { | |
60 String rname = name.substring(name.lastIndexOf('.') + 1) + ".class"; | |
61 java.net.URL url = VictimClassLoader.class.getResource(rname); | |
62 Test8003720.println("found " + rname + " = " + url); | |
63 | |
64 java.net.URLConnection connection = url.openConnection(); | |
65 int contentLength = connection.getContentLength(); | |
66 byte[] buf = readFully(connection.getInputStream(), contentLength); | |
67 | |
68 return Asmator.fixup(buf); | |
69 } catch (java.io.IOException ex) { | |
70 throw new Error(ex); | |
71 } | |
72 } | |
73 | |
74 static byte[] readFully(java.io.InputStream in, int len) throws java.io.IOException { | |
75 // Warning here: | |
76 return sun.misc.IOUtils.readFully(in, len, true); | |
77 } | |
78 | |
79 public void finalize() { | |
80 Test8003720.println("Goodbye from " + this); | |
81 } | |
82 | |
83 public String toString() { | |
84 return "VictimClassLoader#" + which; | |
85 } | |
86 } |