8 *
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 #ifndef SHARE_VM_INTERPRETER_INVOCATIONCOUNTER_HPP
26 #define SHARE_VM_INTERPRETER_INVOCATIONCOUNTER_HPP
27
28 #include "memory/allocation.hpp"
29 #include "runtime/handles.hpp"
30 #include "utilities/exceptions.hpp"
31
32 // InvocationCounters are used to trigger actions when a limit (threshold) is reached.
33 // For different states, different limits and actions can be defined in the initialization
34 // routine of InvocationCounters.
35 //
36 // Implementation notes: For space reasons, state & counter are both encoded in one word,
37 // The state is encoded using some of the least significant bits, the counter is using the
38 // more significant bits. The counter is incremented before a method is activated and an
39 // action is triggered when count() > limit().
40
41 class InvocationCounter {
42 friend class VMStructs;
43 friend class JVMCIVMStructs;
44 friend class ciReplay;
45 private: // bit no: |31 3| 2 | 1 0 |
46 unsigned int _counter; // format: [count|carry|state]
47
48 enum PrivateConstants {
|
8 *
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 #ifndef SHARE_VM_INTERPRETER_INVOCATIONCOUNTER_HPP
26 #define SHARE_VM_INTERPRETER_INVOCATIONCOUNTER_HPP
27
28 #include "runtime/handles.hpp"
29 #include "utilities/exceptions.hpp"
30
31 // InvocationCounters are used to trigger actions when a limit (threshold) is reached.
32 // For different states, different limits and actions can be defined in the initialization
33 // routine of InvocationCounters.
34 //
35 // Implementation notes: For space reasons, state & counter are both encoded in one word,
36 // The state is encoded using some of the least significant bits, the counter is using the
37 // more significant bits. The counter is incremented before a method is activated and an
38 // action is triggered when count() > limit().
39
40 class InvocationCounter {
41 friend class VMStructs;
42 friend class JVMCIVMStructs;
43 friend class ciReplay;
44 private: // bit no: |31 3| 2 | 1 0 |
45 unsigned int _counter; // format: [count|carry|state]
46
47 enum PrivateConstants {
|