14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /*
25 * @test
26 * Verify behaviour of Unsafe.get/putAddress and Unsafe.addressSize
27 * @library /test/lib
28 * @modules java.base/jdk.internal.misc
29 * java.management
30 * @run main GetPutAddress
31 */
32
33 import jdk.test.lib.Platform;
34 import jdk.test.lib.unsafe.UnsafeHelper;
35 import jdk.internal.misc.Unsafe;
36 import static jdk.test.lib.Asserts.*;
37
38 public class GetPutAddress {
39 public static void main(String args[]) throws Exception {
40 Unsafe unsafe = UnsafeHelper.getUnsafe();
41 int addressSize = unsafe.addressSize();
42 // Ensure the size returned from Unsafe.addressSize is correct
43 assertEquals(unsafe.addressSize(), Platform.is32bit() ? 4 : 8);
44
45 // Write the address, read it back and make sure it's the same value
46 long address = unsafe.allocateMemory(addressSize);
47 unsafe.putAddress(address, address);
48 long readAddress = unsafe.getAddress(address);
49 if (addressSize == 4) {
50 readAddress &= 0x00000000FFFFFFFFL;
51 }
52 assertEquals(address, readAddress);
53 unsafe.freeMemory(address);
54 }
55 }
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14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /*
25 * @test
26 * Verify behaviour of Unsafe.get/putAddress and Unsafe.addressSize
27 * @library /test/lib
28 * @modules java.base/jdk.internal.misc
29 * java.management
30 * @run main GetPutAddress
31 */
32
33 import jdk.test.lib.Platform;
34 import jdk.internal.misc.Unsafe;
35 import static jdk.test.lib.Asserts.*;
36
37 public class GetPutAddress {
38 public static void main(String args[]) throws Exception {
39 Unsafe unsafe = Unsafe.getUnsafe();
40 int addressSize = unsafe.addressSize();
41 // Ensure the size returned from Unsafe.addressSize is correct
42 assertEquals(unsafe.addressSize(), Platform.is32bit() ? 4 : 8);
43
44 // Write the address, read it back and make sure it's the same value
45 long address = unsafe.allocateMemory(addressSize);
46 unsafe.putAddress(address, address);
47 long readAddress = unsafe.getAddress(address);
48 if (addressSize == 4) {
49 readAddress &= 0x00000000FFFFFFFFL;
50 }
51 assertEquals(address, readAddress);
52 unsafe.freeMemory(address);
53 }
54 }
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