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comparison test/compiler/profiling/unloadingconflict/TestProfileConflictClassUnloading.java @ 13080:6e1826d5c23e

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8027572: assert(r != 0) failed: invalid Summary: null classes should be expected in profiles with conflicts Reviewed-by: kvn, iveresov
author roland
date Wed, 13 Nov 2013 13:45:50 +0100
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13079:924c32982a12 13080:6e1826d5c23e
1 /*
2 * Copyright (c) 2013, 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 * @test
26 * @bug 8027572
27 * @summary class unloading resets profile, method compiled after the profile is first set and before class loading sets unknown bit with not recorded class
28 * @build B
29 * @run main/othervm -XX:TypeProfileLevel=222 -XX:-BackgroundCompilation TestProfileConflictClassUnloading
30 *
31 */
32
33 import java.net.MalformedURLException;
34 import java.net.URL;
35 import java.net.URLClassLoader;
36 import java.nio.file.Paths;
37
38 public class TestProfileConflictClassUnloading {
39 static class A {
40 }
41
42
43 static void m1(Object o) {
44 }
45
46 static void m2(Object o) {
47 m1(o);
48 }
49
50 static void m3(A a, boolean do_call) {
51 if (!do_call) {
52 return;
53 }
54 m2(a);
55 }
56
57 public static ClassLoader newClassLoader() {
58 try {
59 return new URLClassLoader(new URL[] {
60 Paths.get(System.getProperty("test.classes",".")).toUri().toURL(),
61 }, null);
62 } catch (MalformedURLException e){
63 throw new RuntimeException("Unexpected URL conversion failure", e);
64 }
65 }
66
67 public static void main(String[] args) throws Exception {
68 ClassLoader loader = newClassLoader();
69 Object o = loader.loadClass("B").newInstance();
70 // collect conflicting profiles
71 for (int i = 0; i < 5000; i++) {
72 m2(o);
73 }
74 // prepare for conflict
75 A a = new A();
76 for (int i = 0; i < 5000; i++) {
77 m3(a, false);
78 }
79 // unload class in profile
80 o = null;
81 loader = null;
82 System.gc();
83 // record the conflict
84 m3(a, true);
85 // trigger another GC
86 System.gc();
87 }
88 }