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annotate test/compiler/6910618/Test.java @ 1552:c18cbe5936b8

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6941466: Oracle rebranding changes for Hotspot repositories Summary: Change all the Sun copyrights to Oracle copyright Reviewed-by: ohair
author trims
date Thu, 27 May 2010 19:08:38 -0700
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1 /*
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2 * Copyright (c) 2010, 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 /**
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26 * @test
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27 * @bug 6910605
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28 * @summary C2: NullPointerException/ClassCaseException is thrown when C2 with DeoptimizeALot is used
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29 *
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30 * @run main/othervm -Xmx64m -XX:+IgnoreUnrecognizedVMOptions -XX:+DeoptimizeALot -XX:+DoEscapeAnalysis -Xbatch -XX:InlineSmallCode=2000 Test
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31 *
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32 */
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33
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34 /*
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35 * Added InlineSmallCode=2000 to guaranty inlining of StringBuilder::append() to allow scalar replace StringBuilder object.
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36 *
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37 * original test: gc/gctests/StringGC
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38 */
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39
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40 public class Test {
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41 private final String toAdd = "0123456789abcdef";
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42 private int maxLength;
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43 private static final int numberOfThreads = 8;
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44
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45 private class StringAdder extends Thread {
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46 private String s;
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47
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48 public void test() {
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49 s = s + toAdd;
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50 }
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51 public void run() {
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52 do {
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53 test();
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54 } while (s.length() < maxLength);
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55 }
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56 }
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57
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58 public void test() throws InterruptedException {
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59 maxLength = toAdd.length() * 15000/ numberOfThreads;
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60 StringAdder[] sa = new StringAdder[numberOfThreads];
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61 for (int i = 0; i < numberOfThreads; i++) {
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62 sa[i] = new StringAdder();
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63 sa[i].start();
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64 }
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65 for (int i = 0; i < numberOfThreads; i++) {
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66 sa[i].join();
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67 }
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68 }
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69
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70 public static void main(String[] args) throws InterruptedException {
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71 Test t = new Test();
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72 t.test();
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73 }
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74 }