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src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZOop.java

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   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  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 package sun.jvm.hotspot.gc.z;
  26 
  27 import sun.jvm.hotspot.debugger.Address;
  28 import sun.jvm.hotspot.debugger.OopHandle;
  29 import sun.jvm.hotspot.runtime.VM;
  30 
  31 class ZOop {
  32     private static final long MSB = ~0L ^ (~0L >>> 1);
  33 
  34     private static Address msbAddress() {
  35         return VM.getVM().getUniverse().heap().start().orWithMask(MSB).andWithMask(MSB);
  36     }
  37 
  38     static Address to_address(long value) {
  39         // If the value of an Address becomes 0, null is returned instead of an Address.
  40         // Start with a one-bit address and as a last step, remove that bit.
  41         Address oneAddress = msbAddress();
  42         return oneAddress.orWithMask(value).xorWithMask(ZAddress.as_long(oneAddress));
  43     }
  44 
  45     static Address to_address(OopHandle oop) {
  46         return to_address(ZAddress.as_long(oop));
  47     }
  48 }


   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  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 package sun.jvm.hotspot.gc.z;
  26 
  27 import sun.jvm.hotspot.debugger.Address;
  28 import sun.jvm.hotspot.debugger.OopHandle;

  29 
  30 class ZOop {













  31     static Address to_address(OopHandle oop) {
  32         return ZUtils.longToAddress(ZAddress.as_long(oop));
  33     }
  34 }
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