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.utilities;
26
27 import java.util.*;
28 import sun.jvm.hotspot.debugger.*;
29 import sun.jvm.hotspot.types.*;
30 import sun.jvm.hotspot.runtime.*;
31
32 public class Hashtable extends BasicHashtable {
33 static {
34 VM.registerVMInitializedObserver(new Observer() {
35 public void update(Observable o, Object data) {
36 initialize(VM.getVM().getTypeDataBase());
37 }
38 });
39 }
40
41 private static synchronized void initialize(TypeDataBase db) {
42 // just to confirm that type exists
43 Type type = db.lookupType("IntptrHashtable");
44 }
45
46 // derived class may return Class<? extends HashtableEntry>
47 protected Class getHashtableEntryClass() {
48 return HashtableEntry.class;
49 }
50
51 public int hashToIndex(long fullHash) {
52 return (int) (fullHash % tableSize());
53 }
54
55 public Hashtable(Address addr) {
56 super(addr);
57 }
58
59 // VM's Hashtable::hash_symbol
60 protected static long hashSymbol(byte[] buf) {
61 long h = 0;
62 int s = 0;
63 int len = buf.length;
64 while (len-- > 0) {
65 h = 31*h + (0xFFL & buf[s]);
66 s++;
67 }
68 return h & 0xFFFFFFFFL;
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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.utilities;
26
27 import java.util.*;
28 import sun.jvm.hotspot.debugger.*;
29 import sun.jvm.hotspot.types.*;
30 import sun.jvm.hotspot.oops.*;
31 import sun.jvm.hotspot.runtime.*;
32
33 public class Hashtable extends BasicHashtable {
34 static {
35 VM.registerVMInitializedObserver(new Observer() {
36 public void update(Observable o, Object data) {
37 initialize(VM.getVM().getTypeDataBase());
38 }
39 });
40 }
41
42 private static synchronized void initialize(TypeDataBase db) {
43 // just to confirm that type exists
44 Type type = db.lookupType("IntptrHashtable");
45 }
46
47 // derived class may return Class<? extends HashtableEntry>
48 protected Class getHashtableEntryClass() {
49 return HashtableEntry.class;
50 }
51
52 public int computeHash(Symbol name) {
53 return (int) name.identityHash();
54 }
55
56 public int hashToIndex(long fullHash) {
57 return (int) (fullHash % tableSize());
58 }
59
60 public Hashtable(Address addr) {
61 super(addr);
62 }
63
64 // VM's Hashtable::hash_symbol
65 protected static long hashSymbol(byte[] buf) {
66 long h = 0;
67 int s = 0;
68 int len = buf.length;
69 while (len-- > 0) {
70 h = 31*h + (0xFFL & buf[s]);
71 s++;
72 }
73 return h & 0xFFFFFFFFL;
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