Mercurial > hg > graal-compiler
annotate test/compiler/intrinsics/unsafe/UnsafeGetAddressTest.java @ 20527:8cb56c8cb30d
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author | jiangli |
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date | Mon, 15 Sep 2014 16:39:00 -0400 |
parents | 9ab9f254cfe2 |
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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 6653795 |
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27 * @summary C2 intrinsic for Unsafe.getAddress performs pointer sign extension on 32-bit systems |
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28 * @run main UnsafeGetAddressTest |
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29 * |
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30 */ |
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31 |
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32 import sun.misc.Unsafe; |
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33 import java.lang.reflect.*; |
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34 |
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35 public class UnsafeGetAddressTest { |
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36 private static Unsafe unsafe; |
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37 |
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38 public static void main(String[] args) throws Exception { |
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39 Class c = UnsafeGetAddressTest.class.getClassLoader().loadClass("sun.misc.Unsafe"); |
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40 Field f = c.getDeclaredField("theUnsafe"); |
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41 f.setAccessible(true); |
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42 unsafe = (Unsafe)f.get(c); |
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43 |
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44 long address = unsafe.allocateMemory(unsafe.addressSize()); |
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45 unsafe.putAddress(address, 0x0000000080000000L); |
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46 // from sun.misc.Unsafe.getAddress' documentation: |
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47 // "If the native pointer is less than 64 bits wide, it is |
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48 // extended as an unsigned number to a Java long." |
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49 result = unsafe.getAddress(address); |
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50 System.out.printf("1: was 0x%x, expected 0x%x\n", result, |
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51 0x0000000080000000L); |
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52 for (int i = 0; i < 1000000; i++) { |
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53 result = unsafe.getAddress(address); |
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54 } |
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55 |
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56 // The code has got compiled, check the result now |
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57 System.out.printf("2: was 0x%x, expected 0x%x\n", result, |
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58 0x0000000080000000L); |
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59 if (result != 0x0000000080000000L) { |
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60 System.out.println("Test Failed"); |
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61 System.exit(97); |
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62 } else { |
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63 System.out.println("Test Passed"); |
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64 } |
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65 } |
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66 static volatile long result; |
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67 } |
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68 |