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/*
* Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 6653795
* @summary C2 intrinsic for Unsafe.getAddress performs pointer sign extension on 32-bit systems
* @modules java.base/jdk.internal.misc:+open
*
* @run main compiler.intrinsics.unsafe.UnsafeGetAddressTest
*/
package compiler.intrinsics.unsafe;
import jdk.internal.misc.Unsafe;
import java.lang.reflect.Field;
public class UnsafeGetAddressTest {
private static Unsafe unsafe;
public static void main(String[] args) throws Exception {
Class c = UnsafeGetAddressTest.class.getClassLoader().loadClass("jdk.internal.misc.Unsafe");
Field f = c.getDeclaredField("theUnsafe");
f.setAccessible(true);
unsafe = (Unsafe)f.get(c);
long address = unsafe.allocateMemory(unsafe.addressSize());
unsafe.putAddress(address, 0x0000000080000000L);
// from jdk.internal.misc.Unsafe.getAddress' documentation:
// "If the native pointer is less than 64 bits wide, it is
// extended as an unsigned number to a Java long."
result = unsafe.getAddress(address);
System.out.printf("1: was 0x%x, expected 0x%x\n", result,
0x0000000080000000L);
for (int i = 0; i < 1000000; i++) {
result = unsafe.getAddress(address);
}
// The code has got compiled, check the result now
System.out.printf("2: was 0x%x, expected 0x%x\n", result,
0x0000000080000000L);
if (result != 0x0000000080000000L) {
System.out.println("Test Failed");
System.exit(97);
} else {
System.out.println("Test Passed");
}
}
static volatile long result;
}
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