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68 lines
2.5 KiB
68 lines
2.5 KiB
/* |
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* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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/* |
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* @test |
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* @bug 6653795 |
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* @summary C2 intrinsic for Unsafe.getAddress performs pointer sign extension on 32-bit systems |
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* @run main UnsafeGetAddressTest |
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* |
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*/ |
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import sun.misc.Unsafe; |
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import java.lang.reflect.*; |
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public class UnsafeGetAddressTest { |
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private static Unsafe unsafe; |
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public static void main(String[] args) throws Exception { |
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Class c = UnsafeGetAddressTest.class.getClassLoader().loadClass("sun.misc.Unsafe"); |
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Field f = c.getDeclaredField("theUnsafe"); |
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f.setAccessible(true); |
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unsafe = (Unsafe)f.get(c); |
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long address = unsafe.allocateMemory(unsafe.addressSize()); |
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unsafe.putAddress(address, 0x0000000080000000L); |
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// from sun.misc.Unsafe.getAddress' documentation: |
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// "If the native pointer is less than 64 bits wide, it is |
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// extended as an unsigned number to a Java long." |
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result = unsafe.getAddress(address); |
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System.out.printf("1: was 0x%x, expected 0x%x\n", result, |
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0x0000000080000000L); |
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for (int i = 0; i < 1000000; i++) { |
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result = unsafe.getAddress(address); |
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} |
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// The code has got compiled, check the result now |
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System.out.printf("2: was 0x%x, expected 0x%x\n", result, |
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0x0000000080000000L); |
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if (result != 0x0000000080000000L) { |
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System.out.println("Test Failed"); |
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System.exit(97); |
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} else { |
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System.out.println("Test Passed"); |
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} |
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} |
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static volatile long result; |
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} |
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