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13080
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1 /*
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2 * Copyright (c) 2013, 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 8027572
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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
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28 * @build B
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29 * @run main/othervm -XX:TypeProfileLevel=222 -XX:-BackgroundCompilation TestProfileConflictClassUnloading
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30 *
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31 */
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32
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33 import java.net.MalformedURLException;
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34 import java.net.URL;
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35 import java.net.URLClassLoader;
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36 import java.nio.file.Paths;
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37
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38 public class TestProfileConflictClassUnloading {
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39 static class A {
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40 }
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41
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42
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43 static void m1(Object o) {
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44 }
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45
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46 static void m2(Object o) {
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47 m1(o);
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48 }
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49
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50 static void m3(A a, boolean do_call) {
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51 if (!do_call) {
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52 return;
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53 }
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54 m2(a);
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55 }
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56
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57 public static ClassLoader newClassLoader() {
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58 try {
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59 return new URLClassLoader(new URL[] {
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60 Paths.get(System.getProperty("test.classes",".")).toUri().toURL(),
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61 }, null);
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62 } catch (MalformedURLException e){
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63 throw new RuntimeException("Unexpected URL conversion failure", e);
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64 }
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65 }
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66
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67 public static void main(String[] args) throws Exception {
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68 ClassLoader loader = newClassLoader();
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69 Object o = loader.loadClass("B").newInstance();
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70 // collect conflicting profiles
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71 for (int i = 0; i < 5000; i++) {
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72 m2(o);
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73 }
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74 // prepare for conflict
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75 A a = new A();
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76 for (int i = 0; i < 5000; i++) {
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77 m3(a, false);
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78 }
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79 // unload class in profile
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80 o = null;
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81 loader = null;
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82 System.gc();
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83 // record the conflict
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84 m3(a, true);
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85 // trigger another GC
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86 System.gc();
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87 }
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88 }
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