aoqi@0: /*
aoqi@0:  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #ifndef SHARE_VM_OOPS_METHODCOUNTERS_HPP
aoqi@0: #define SHARE_VM_OOPS_METHODCOUNTERS_HPP
aoqi@0: 
aoqi@0: #include "oops/metadata.hpp"
aoqi@0: #include "interpreter/invocationCounter.hpp"
aoqi@0: 
aoqi@0: class MethodCounters: public MetaspaceObj {
aoqi@0:  friend class VMStructs;
aoqi@0:  private:
aoqi@0:   int               _interpreter_invocation_count; // Count of times invoked (reused as prev_event_count in tiered)
aoqi@0:   u2                _interpreter_throwout_count; // Count of times method was exited via exception while interpreting
aoqi@0:   u2                _number_of_breakpoints;      // fullspeed debugging support
aoqi@0:   InvocationCounter _invocation_counter;         // Incremented before each activation of the method - used to trigger frequency-based optimizations
aoqi@0:   InvocationCounter _backedge_counter;           // Incremented before each backedge taken - used to trigger frequencey-based optimizations
aoqi@0: 
aoqi@0: #ifdef TIERED
aoqi@0:   float             _rate;                        // Events (invocation and backedge counter increments) per millisecond
aoqi@0:   jlong             _prev_time;                   // Previous time the rate was acquired
aoqi@0: #endif
aoqi@0: 
aoqi@0:   MethodCounters() : _interpreter_invocation_count(0),
aoqi@0:                      _interpreter_throwout_count(0),
aoqi@0:                      _number_of_breakpoints(0)
aoqi@0: #ifdef TIERED
aoqi@0:                    , _rate(0),
aoqi@0:                      _prev_time(0)
aoqi@0: #endif
aoqi@0:   {
aoqi@0:     invocation_counter()->init();
aoqi@0:     backedge_counter()->init();
aoqi@0:   }
aoqi@0: 
aoqi@0:  public:
aoqi@0:   static MethodCounters* allocate(ClassLoaderData* loader_data, TRAPS);
aoqi@0: 
aoqi@0:   void deallocate_contents(ClassLoaderData* loader_data) {}
aoqi@0:   DEBUG_ONLY(bool on_stack() { return false; })  // for template
aoqi@0: 
aoqi@0:   static int size() { return sizeof(MethodCounters) / wordSize; }
aoqi@0: 
aoqi@0:   bool is_klass() const { return false; }
aoqi@0: 
aoqi@0:   void clear_counters();
aoqi@0: 
aoqi@0:   int interpreter_invocation_count() {
aoqi@0:     return _interpreter_invocation_count;
aoqi@0:   }
aoqi@0:   void set_interpreter_invocation_count(int count) {
aoqi@0:     _interpreter_invocation_count = count;
aoqi@0:   }
aoqi@0:   int increment_interpreter_invocation_count() {
aoqi@0:     return ++_interpreter_invocation_count;
aoqi@0:   }
aoqi@0: 
aoqi@0:   void interpreter_throwout_increment() {
aoqi@0:     if (_interpreter_throwout_count < 65534) {
aoqi@0:       _interpreter_throwout_count++;
aoqi@0:     }
aoqi@0:   }
aoqi@0:   int  interpreter_throwout_count() const {
aoqi@0:     return _interpreter_throwout_count;
aoqi@0:   }
aoqi@0:   void set_interpreter_throwout_count(int count) {
aoqi@0:     _interpreter_throwout_count = count;
aoqi@0:   }
aoqi@0: 
aoqi@0:   u2   number_of_breakpoints() const   { return _number_of_breakpoints; }
aoqi@0:   void incr_number_of_breakpoints()    { ++_number_of_breakpoints; }
aoqi@0:   void decr_number_of_breakpoints()    { --_number_of_breakpoints; }
aoqi@0:   void clear_number_of_breakpoints()   { _number_of_breakpoints = 0; }
aoqi@0: 
aoqi@0: #ifdef TIERED
aoqi@0:   jlong prev_time() const                        { return _prev_time; }
aoqi@0:   void set_prev_time(jlong time)                 { _prev_time = time; }
aoqi@0:   float rate() const                             { return _rate; }
aoqi@0:   void set_rate(float rate)                      { _rate = rate; }
aoqi@0: #endif
aoqi@0: 
aoqi@0:   // invocation counter
aoqi@0:   InvocationCounter* invocation_counter() { return &_invocation_counter; }
aoqi@0:   InvocationCounter* backedge_counter()   { return &_backedge_counter; }
aoqi@0: 
aoqi@0:   static ByteSize interpreter_invocation_counter_offset() {
aoqi@0:     return byte_offset_of(MethodCounters, _interpreter_invocation_count);
aoqi@0:   }
aoqi@0: 
aoqi@0:   static ByteSize invocation_counter_offset()    {
aoqi@0:     return byte_offset_of(MethodCounters, _invocation_counter);
aoqi@0:   }
aoqi@0: 
aoqi@0:   static ByteSize backedge_counter_offset()      {
aoqi@0:     return byte_offset_of(MethodCounters, _backedge_counter);
aoqi@0:   }
aoqi@0: 
aoqi@0:   static int interpreter_invocation_counter_offset_in_bytes() {
aoqi@0:     return offset_of(MethodCounters, _interpreter_invocation_count);
aoqi@0:   }
aoqi@0: 
aoqi@0: };
aoqi@0: #endif //SHARE_VM_OOPS_METHODCOUNTERS_HPP