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 /*

  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  *

  */

 #ifndef SHARE_VM_RUNTIME_FPROFILER_HPP

 #define SHARE_VM_RUNTIME_FPROFILER_HPP

 #include "utilities/macros.hpp"

 #include "runtime/timer.hpp"

 // a simple flat profiler for Java

 // Forward declaration of classes defined in this header file

 class ThreadProfiler;

 class ThreadProfilerMark;

 class FlatProfiler;

 class IntervalData;

 // Declarations of classes defined only in the implementation.

 class ProfilerNode;

 class FlatProfilerTask;

 enum TickPosition {

   tp_code,

   tp_native

 };

 // One of these guys is constructed as we enter interesting regions

 // and destructed as we exit the region.  While we are in the region

 // ticks are allotted to the region.

 class ThreadProfilerMark: public StackObj {

 public:

   // For now, the only thread-specific region is the class loader.

   enum Region { noRegion, classLoaderRegion, extraRegion, maxRegion };

   ThreadProfilerMark(Region)  NOT_FPROF_RETURN;

   ~ThreadProfilerMark()       NOT_FPROF_RETURN;

 private:

   ThreadProfiler* _pp;

   Region _r;

 };

 #if INCLUDE_FPROF

 class IntervalData VALUE_OBJ_CLASS_SPEC {

   // Just to keep these things all together

 private:

   int _interpreted;

   int _compiled;

   int _native;

   int _compiling;

 public:

   int interpreted() {

     return _interpreted;

   }

   int compiled() {

     return _compiled;

   }

   int native() {

     return _native;

   }

   int compiling() {

     return _compiling;

   }

   int total() {

     return (interpreted() + compiled() + native() + compiling());

   }

   void inc_interpreted() {

     _interpreted += 1;

   }

   void inc_compiled() {

     _compiled += 1;

   }

   void inc_native() {

     _native += 1;

   }

   void inc_compiling() {

     _compiling += 1;

   }

   void reset() {

     _interpreted = 0;

     _compiled = 0;

     _native = 0;

     _compiling = 0;

   }

   static void print_header(outputStream* st);

   void print_data(outputStream* st);

 };

 #endif // INCLUDE_FPROF

 class ThreadProfiler: public CHeapObj<mtInternal> {

 public:

   ThreadProfiler()    NOT_FPROF_RETURN;

   ~ThreadProfiler()   NOT_FPROF_RETURN;

   // Resets the profiler

   void reset()        NOT_FPROF_RETURN;

   // Activates the profiler for a certain thread

   void engage()       NOT_FPROF_RETURN;

   // Deactivates the profiler

   void disengage()    NOT_FPROF_RETURN;

   // Prints the collected profiling information

   void print(const char* thread_name) NOT_FPROF_RETURN;

   // Garbage Collection Support

   void oops_do(OopClosure* f)         NOT_FPROF_RETURN;

 #if INCLUDE_FPROF

 private:

   // for recording ticks.

   friend class ProfilerNode;

   char* area_bottom; // preallocated area for pnodes

   char* area_top;

   char* area_limit;

   static int            table_size;

   ProfilerNode** table;

 private:

   void record_interpreted_tick(JavaThread* thread, frame fr, TickPosition where, int* ticks);

   void record_compiled_tick   (JavaThread* thread, frame fr, TickPosition where);

   void interpreted_update(Method* method, TickPosition where);

   void compiled_update   (Method* method, TickPosition where);

   void stub_update       (Method* method, const char* name, TickPosition where);

   void adapter_update    (TickPosition where);

   void runtime_stub_update(const CodeBlob* stub, const char* name, TickPosition where);

   void unknown_compiled_update    (const CodeBlob* cb, TickPosition where);

   void vm_update    (TickPosition where);

   void vm_update    (const char* name, TickPosition where);

   void record_tick_for_running_frame(JavaThread* thread, frame fr);

   void record_tick_for_calling_frame(JavaThread* thread, frame fr);

   void initialize();

   static int  entry(int value);

 private:

   friend class FlatProfiler;

   void record_tick(JavaThread* thread);

   bool engaged;

   // so we can do percentages for this thread, and quick checks for activity

   int thread_ticks;

   int compiler_ticks;

   int interpreter_ticks;

 public:

   void inc_thread_ticks() { thread_ticks += 1; }

 private:

   friend class ThreadProfilerMark;

   // counters for thread-specific regions

   bool region_flag[ThreadProfilerMark::maxRegion];

   int class_loader_ticks;

   int extra_ticks;

 private:

   // other thread-specific regions

   int blocked_ticks;

   enum UnknownTickSites {

       ut_null_method,

       ut_vtable_stubs,

       ut_running_frame,

       ut_calling_frame,

       ut_no_pc,

       ut_no_last_Java_frame,

       ut_unknown_thread_state,

       ut_end

   };

   int unknown_ticks_array[ut_end];

   int unknown_ticks() {

     int result = 0;

     for (int ut = 0; ut < ut_end; ut += 1) {

       result += unknown_ticks_array[ut];

     }

     return result;

   }

   elapsedTimer timer;

   // For interval timing

 private:

   IntervalData _interval_data;

   IntervalData interval_data() {

     return _interval_data;

   }

   IntervalData* interval_data_ref() {

     return &_interval_data;

   }

 #endif // INCLUDE_FPROF

 };

 class FlatProfiler: AllStatic {

 public:

   static void reset() NOT_FPROF_RETURN ;

   static void engage(JavaThread* mainThread, bool fullProfile) NOT_FPROF_RETURN ;

   static void disengage() NOT_FPROF_RETURN ;

   static void print(int unused) NOT_FPROF_RETURN ;

   static bool is_active() NOT_FPROF_RETURN_(false) ;

   // This is NULL if each thread has its own thread profiler,

   // else this is the single thread profiler used by all threads.

   // In particular it makes a difference during garbage collection,

   // where you only want to traverse each thread profiler once.

   static ThreadProfiler* get_thread_profiler() NOT_FPROF_RETURN_(NULL);

   // Garbage Collection Support

   static void oops_do(OopClosure* f) NOT_FPROF_RETURN ;

   // Support for disassembler to inspect the PCRecorder

   // Returns the start address for a given pc

   // NULL is returned if the PCRecorder is inactive

   static address bucket_start_for(address pc) NOT_FPROF_RETURN_(NULL);

   enum { MillisecsPerTick = 10 };   // ms per profiling ticks

   // Returns the number of ticks recorded for the bucket

   // pc belongs to.

   static int bucket_count_for(address pc) NOT_FPROF_RETURN_(0);

 #if INCLUDE_FPROF

  private:

   static bool full_profile() {

     return full_profile_flag;

   }

   friend class ThreadProfiler;

   // the following group of ticks cover everything that's not attributed to individual Java methods

   static int  received_gc_ticks;      // ticks during which gc was active

   static int vm_operation_ticks;      // total ticks in vm_operations other than GC

   static int threads_lock_ticks;      // the number of times we couldn't get the Threads_lock without blocking

   static int      blocked_ticks;      // ticks when the thread was blocked.

   static int class_loader_ticks;      // total ticks in class loader

   static int        extra_ticks;      // total ticks an extra temporary measuring

   static int     compiler_ticks;      // total ticks in compilation

   static int  interpreter_ticks;      // ticks in unknown interpreted method

   static int        deopt_ticks;      // ticks in deoptimization

   static int      unknown_ticks;      // ticks that cannot be categorized

   static int     received_ticks;      // ticks that were received by task

   static int    delivered_ticks;      // ticks that were delivered by task

   static int non_method_ticks() {

     return

       ( received_gc_ticks

       + vm_operation_ticks

       + deopt_ticks

       + threads_lock_ticks

       + blocked_ticks

       + compiler_ticks

       + interpreter_ticks

       + unknown_ticks );

   }

   static elapsedTimer timer;

   // Counts of each of the byte codes

   static int*           bytecode_ticks;

   static int*           bytecode_ticks_stub;

   static void print_byte_code_statistics();

   // the ticks below are for continuous profiling (to adjust recompilation, etc.)

   static int          all_ticks;      // total count of ticks received so far

   static int      all_int_ticks;      // ticks in interpreter

   static int     all_comp_ticks;      // ticks in compiled code (+ native)

   static bool full_profile_flag;      // collecting full profile?

   // to accumulate thread-specific data

   // if we aren't profiling individual threads.

   static ThreadProfiler* thread_profiler;

   static ThreadProfiler* vm_thread_profiler;

   static void allocate_table();

   // The task that periodically interrupts things.

   friend class FlatProfilerTask;

   static FlatProfilerTask* task;

   static void record_vm_operation();

   static void record_vm_tick();

   static void record_thread_ticks();

   // For interval analysis

  private:

   static int interval_ticks_previous;  // delivered_ticks from the last interval

   static void interval_record_thread(ThreadProfiler* tp); // extract ticks from ThreadProfiler.

   static void interval_print();       // print interval data.

   static void interval_reset();       // reset interval data.

   enum {interval_print_size = 10};

   static IntervalData* interval_data;

 #endif // INCLUDE_FPROF

 };

 #endif // SHARE_VM_RUNTIME_FPROFILER_HPP