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annotate test/compiler/EscapeAnalysis/TestUnsafePutAddressNullObjMustNotEscape.java @ 18991:5ff49be5a02c

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Add a corner case test case with a mixture of unsafe writes and normal reads.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Tue, 27 Jan 2015 23:52:05 +0100
parents 87b5e00100fe
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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 }