Mercurial > hg > graal-jvmci-8
comparison test/compiler/uncommontrap/TestLockEliminatedAtDeopt.java @ 14510:3df21373e577
8032011: nsk/stress/jck60/jck60022 crashes in src\share\vm\runtime\synchronizer.cpp:239
Summary: biased locking's revoke_bias locks monitor in compiled frame with eliminated lock
Reviewed-by: kvn, iveresov
author | roland |
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date | Thu, 27 Feb 2014 09:37:16 +0100 |
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14509:b3e1a903b6e8 | 14510:3df21373e577 |
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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 /* | |
25 * @test | |
26 * @bug 8032011 | |
27 * @summary biased locking's revoke_bias locks monitor in compiled frame with eliminated lock | |
28 * @run main/othervm -XX:-UseOnStackReplacement -XX:CompileCommand=dontinline,TestLockEliminatedAtDeopt$A.m2 -XX:-BackgroundCompilation -XX:BiasedLockingStartupDelay=0 TestLockEliminatedAtDeopt | |
29 * | |
30 */ | |
31 | |
32 public class TestLockEliminatedAtDeopt { | |
33 | |
34 static class A { | |
35 void m() { | |
36 } | |
37 | |
38 // This lock is not eliminated but biased to main thread on | |
39 // first call | |
40 synchronized void m2(boolean trap) { | |
41 if (trap) { | |
42 new B(); | |
43 } | |
44 } | |
45 } | |
46 | |
47 static class B extends A { | |
48 void m() { | |
49 } | |
50 } | |
51 | |
52 static void m1(boolean trap) { | |
53 A a = new A(); | |
54 // This lock is eliminated by c2 | |
55 synchronized(a) { | |
56 a.m2(trap); | |
57 a.m(); | |
58 } | |
59 } | |
60 | |
61 public static void main(String[] args) { | |
62 for (int i = 0; i < 20000; i++) { | |
63 m1(false); | |
64 } | |
65 // Trigger uncommon trap in A.m2() (class unloaded) and | |
66 // deoptimization of m1() (CHA invalidated). Uncommon trap | |
67 // code locks monitor in m1's frame where's it's eliminated. | |
68 m1(true); | |
69 } | |
70 } |