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 8031752 |
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27 * @summary speculative traps need to be cleaned up at GC |
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28 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-TieredCompilation -XX:-UseOnStackReplacement -XX:-BackgroundCompilation -XX:+UseTypeSpeculation -XX:TypeProfileLevel=222 -XX:CompileCommand=exclude,java.lang.reflect.Method::invoke -XX:CompileCommand=exclude,sun.reflect.DelegatingMethodAccessorImpl::invoke -Xmx512M TestSpecTrapClassUnloading |
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29 * |
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30 */ |
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31 |
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32 import java.lang.reflect.Method; |
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33 |
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34 public class TestSpecTrapClassUnloading { |
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35 static class B { |
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36 final public boolean m(Object o) { |
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37 if (o.getClass() == B.class) { |
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38 return true; |
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39 } |
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40 return false; |
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41 } |
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42 } |
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43 |
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44 static class MemoryChunk { |
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45 MemoryChunk other; |
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46 long[] array; |
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47 MemoryChunk(MemoryChunk other) { |
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48 this.other = other; |
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49 array = new long[1024 * 1024 * 1024]; |
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50 } |
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51 } |
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52 |
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53 static void m1(B b, Object o) { |
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54 b.m(o); |
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55 } |
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56 |
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57 static void m2(B b, Object o) { |
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58 b.m(o); |
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59 } |
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60 |
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61 public static void main(String[] args) throws Exception { |
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62 Method m = B.class.getMethod("m", Object.class); |
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63 Object o = new Object(); |
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64 B b = new B(); |
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65 |
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66 // add speculative trap in B.m() for m1 |
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67 for (int i = 0; i < 20000; i++) { |
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68 m1(b, b); |
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69 } |
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70 m1(b, o); |
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71 |
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72 // add speculative trap in B.m() for code generated by reflection |
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73 for (int i = 0; i < 20000; i++) { |
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74 m.invoke(b, b); |
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75 } |
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76 m.invoke(b, o); |
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77 |
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78 m = null; |
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79 |
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80 // add speculative trap in B.m() for m2 |
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81 for (int i = 0; i < 20000; i++) { |
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82 m2(b, b); |
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83 } |
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84 m2(b, o); |
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85 |
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86 // Exhaust memory which causes the code generated by |
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87 // reflection to be unloaded but B.m() is not. |
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88 MemoryChunk root = null; |
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89 try { |
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90 while (true) { |
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91 root = new MemoryChunk(root); |
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92 } |
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93 } catch(OutOfMemoryError e) { |
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94 root = null; |
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95 } |
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96 } |
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97 } |
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