Mercurial > hg > truffle
annotate test/compiler/EscapeAnalysis/TestUnsafePutAddressNullObjMustNotEscape.java @ 18173:8c079b8d0446
Reduce allocation during scope recording
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Fri, 24 Oct 2014 12:48:53 -0700 |
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1 /* |
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2 * Copyright 2014 SAP AG. 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 8038048 |
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27 * @summary assert(null_obj->escape_state() == PointsToNode::NoEscape,etc) |
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28 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+DoEscapeAnalysis -XX:-TieredCompilation -Xbatch TestUnsafePutAddressNullObjMustNotEscape |
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29 * @author Richard Reingruber richard DOT reingruber AT sap DOT com |
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30 */ |
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31 |
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32 import java.lang.reflect.Field; |
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33 import sun.misc.Unsafe; |
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34 |
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35 public class TestUnsafePutAddressNullObjMustNotEscape { |
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36 |
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37 public static Unsafe usafe; |
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38 public static long mem; |
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39 public static long checksum; |
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40 |
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41 public static void main(String[] args) throws Exception { |
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42 System.out.println("EXECUTING test."); |
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43 |
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44 { |
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45 System.out.println("Acquiring sun.misc.Unsafe.theUnsafe using reflection."); |
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46 getUnsafe(); |
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47 System.out.println("Allocating raw memory."); |
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48 mem = (usafe.allocateMemory(1024) + 8L) & ~7L; |
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49 System.out.println("Triggering JIT compilation of the test method"); |
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50 triggerJitCompilationOfTestMethod(); |
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51 } |
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52 |
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53 System.out.println("SUCCESSFULLY passed test."); |
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54 } |
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55 |
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56 public static void triggerJitCompilationOfTestMethod() { |
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57 long sum = 0; |
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58 for (int ii = 50000; ii >= 0; ii--) { |
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59 sum = testMethod(); |
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60 } |
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61 checksum = sum; |
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62 } |
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63 |
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64 public static class IDGen { |
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65 private static long id; |
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66 public long nextId() { |
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67 return id++; |
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68 } |
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69 } |
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70 |
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71 public static long testMethod() { |
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72 // dummy alloc to trigger escape analysis |
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73 IDGen gen = new IDGen(); |
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74 // StoreP of null_obj to raw mem triggers assertion in escape analysis |
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75 usafe.putAddress(mem, 0L); |
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76 return gen.nextId(); |
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77 } |
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78 |
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79 private static void getUnsafe() throws Exception { |
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80 Field field = sun.misc.Unsafe.class.getDeclaredField("theUnsafe"); |
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81 field.setAccessible(true); |
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82 usafe = (sun.misc.Unsafe) field.get(null); |
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83 } |
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84 } |