Mercurial > jdk8-mips64-public > hotspot / annotate
test/compiler/uncommontrap/TestLockEliminatedAtDeopt.java@49b5160951dd (annotated)
test/compiler/uncommontrap/TestLockEliminatedAtDeopt.java
Thu, 17 Apr 2014 16:09:08 -0700
- author
- amurillo
- date
- Thu, 17 Apr 2014 16:09:08 -0700
- changeset 6635
- 49b5160951dd
- parent 0
- f90c822e73f8
- permissions
- -rw-r--r--
Added tag hs25.20-b11 for changeset b6a2ba7d3ea7
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. |
| aoqi@0 | 8 | * |
| aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 13 | * accompanied this code). |
| aoqi@0 | 14 | * |
| aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 18 | * |
| aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 21 | * questions. |
| aoqi@0 | 22 | */ |
| aoqi@0 | 23 | |
| aoqi@0 | 24 | /* |
| aoqi@0 | 25 | * @test |
| aoqi@0 | 26 | * @bug 8032011 |
| aoqi@0 | 27 | * @summary biased locking's revoke_bias locks monitor in compiled frame with eliminated lock |
| aoqi@0 | 28 | * @run main/othervm -XX:-UseOnStackReplacement -XX:CompileCommand=dontinline,TestLockEliminatedAtDeopt$A.m2 -XX:-BackgroundCompilation -XX:BiasedLockingStartupDelay=0 TestLockEliminatedAtDeopt |
| aoqi@0 | 29 | * |
| aoqi@0 | 30 | */ |
| aoqi@0 | 31 | |
| aoqi@0 | 32 | public class TestLockEliminatedAtDeopt { |
| aoqi@0 | 33 | |
| aoqi@0 | 34 | static class A { |
| aoqi@0 | 35 | void m() { |
| aoqi@0 | 36 | } |
| aoqi@0 | 37 | |
| aoqi@0 | 38 | // This lock is not eliminated but biased to main thread on |
| aoqi@0 | 39 | // first call |
| aoqi@0 | 40 | synchronized void m2(boolean trap) { |
| aoqi@0 | 41 | if (trap) { |
| aoqi@0 | 42 | new B(); |
| aoqi@0 | 43 | } |
| aoqi@0 | 44 | } |
| aoqi@0 | 45 | } |
| aoqi@0 | 46 | |
| aoqi@0 | 47 | static class B extends A { |
| aoqi@0 | 48 | void m() { |
| aoqi@0 | 49 | } |
| aoqi@0 | 50 | } |
| aoqi@0 | 51 | |
| aoqi@0 | 52 | static void m1(boolean trap) { |
| aoqi@0 | 53 | A a = new A(); |
| aoqi@0 | 54 | // This lock is eliminated by c2 |
| aoqi@0 | 55 | synchronized(a) { |
| aoqi@0 | 56 | a.m2(trap); |
| aoqi@0 | 57 | a.m(); |
| aoqi@0 | 58 | } |
| aoqi@0 | 59 | } |
| aoqi@0 | 60 | |
| aoqi@0 | 61 | public static void main(String[] args) { |
| aoqi@0 | 62 | for (int i = 0; i < 20000; i++) { |
| aoqi@0 | 63 | m1(false); |
| aoqi@0 | 64 | } |
| aoqi@0 | 65 | // Trigger uncommon trap in A.m2() (class unloaded) and |
| aoqi@0 | 66 | // deoptimization of m1() (CHA invalidated). Uncommon trap |
| aoqi@0 | 67 | // code locks monitor in m1's frame where's it's eliminated. |
| aoqi@0 | 68 | m1(true); |
| aoqi@0 | 69 | } |
| aoqi@0 | 70 | } |
