Mercurial > hg > truffle
annotate test/compiler/uncommontrap/TestLockEliminatedAtDeopt.java @ 18440:7aae90a0031c
LIR: map all VirtualStackSlot operands to StackSlots.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Tue, 11 Nov 2014 17:03:16 +0100 |
parents | 3df21373e577 |
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rev | line source |
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1 /* |
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 |
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24 /* |
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25 * @test |
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26 * @bug 8032011 |
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27 * @summary biased locking's revoke_bias locks monitor in compiled frame with eliminated lock |
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28 * @run main/othervm -XX:-UseOnStackReplacement -XX:CompileCommand=dontinline,TestLockEliminatedAtDeopt$A.m2 -XX:-BackgroundCompilation -XX:BiasedLockingStartupDelay=0 TestLockEliminatedAtDeopt |
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29 * |
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30 */ |
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31 |
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32 public class TestLockEliminatedAtDeopt { |
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33 |
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34 static class A { |
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35 void m() { |
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36 } |
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37 |
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38 // This lock is not eliminated but biased to main thread on |
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39 // first call |
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40 synchronized void m2(boolean trap) { |
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41 if (trap) { |
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42 new B(); |
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43 } |
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44 } |
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45 } |
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46 |
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47 static class B extends A { |
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48 void m() { |
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49 } |
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50 } |
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51 |
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52 static void m1(boolean trap) { |
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53 A a = new A(); |
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54 // This lock is eliminated by c2 |
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55 synchronized(a) { |
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56 a.m2(trap); |
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57 a.m(); |
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58 } |
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59 } |
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60 |
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61 public static void main(String[] args) { |
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62 for (int i = 0; i < 20000; i++) { |
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63 m1(false); |
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64 } |
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65 // Trigger uncommon trap in A.m2() (class unloaded) and |
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66 // deoptimization of m1() (CHA invalidated). Uncommon trap |
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67 // code locks monitor in m1's frame where's it's eliminated. |
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68 m1(true); |
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69 } |
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70 } |