/*

 * Copyright (c) 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_SERVICES_MEM_REPORTER_HPP

#define SHARE_VM_SERVICES_MEM_REPORTER_HPP

#include "runtime/mutexLocker.hpp"

#include "services/memBaseline.hpp"

#include "services/memTracker.hpp"

#include "utilities/ostream.hpp"

/*

 * MemBaselineReporter reports data to this outputer class,

 * ReportOutputer is responsible for format, store and redirect

 * the data to the final destination.

 */

class BaselineOutputer : public StackObj {

 public:

  // start to report memory usage in specified scale.

  // if report_diff = true, the reporter reports baseline comparison

  // information.

  virtual void start(size_t scale, bool report_diff = false) = 0;

  // Done reporting

  virtual void done() = 0;

  /* report baseline summary information */

  virtual void total_usage(size_t total_reserved,

                           size_t total_committed) = 0;

  virtual void num_of_classes(size_t classes) = 0;

  virtual void num_of_threads(size_t threads) = 0;

  virtual void thread_info(size_t stack_reserved_amt, size_t stack_committed_amt) = 0;

  /* report baseline summary comparison */

  virtual void diff_total_usage(size_t total_reserved,

                                size_t total_committed,

                                int reserved_diff,

                                int committed_diff) = 0;

  virtual void diff_num_of_classes(size_t classes, int diff) = 0;

  virtual void diff_num_of_threads(size_t threads, int diff) = 0;

  virtual void diff_thread_info(size_t stack_reserved, size_t stack_committed,

        int stack_reserved_diff, int stack_committed_diff) = 0;

  /*

   * memory summary by memory types.

   * for each memory type, following summaries are reported:

   *  - reserved amount, committed amount

   *  - malloc'd amount, malloc count

   *  - arena amount, arena count

   */

  // start reporting memory summary by memory type

  virtual void start_category_summary() = 0;

  virtual void category_summary(MEMFLAGS type, size_t reserved_amt,

                                size_t committed_amt,

                                size_t malloc_amt, size_t malloc_count,

                                size_t arena_amt, size_t arena_count) = 0;

  virtual void diff_category_summary(MEMFLAGS type, size_t cur_reserved_amt,

                                size_t cur_committed_amt,

                                size_t cur_malloc_amt, size_t cur_malloc_count,

                                size_t cur_arena_amt, size_t cur_arena_count,

                                int reserved_diff, int committed_diff, int malloc_diff,

                                int malloc_count_diff, int arena_diff,

                                int arena_count_diff) = 0;

  virtual void done_category_summary() = 0;

  /*

   *  Report callsite information

   */

  virtual void start_callsite() = 0;

  virtual void malloc_callsite(address pc, size_t malloc_amt, size_t malloc_count) = 0;

  virtual void virtual_memory_callsite(address pc, size_t reserved_amt, size_t committed_amt) = 0;

  virtual void diff_malloc_callsite(address pc, size_t cur_malloc_amt, size_t cur_malloc_count,

              int malloc_diff, int malloc_count_diff) = 0;

  virtual void diff_virtual_memory_callsite(address pc, size_t cur_reserved_amt, size_t cur_committed_amt,

              int reserved_diff, int committed_diff) = 0;

  virtual void done_callsite() = 0;

  // return current scale in "KB", "MB" or "GB"

  static const char* memory_unit(size_t scale);

};

/*

 * This class reports processed data from a baseline or

 * the changes between the two baseline.

 */

class BaselineReporter : public StackObj {

 private:

  BaselineOutputer&  _outputer;

  size_t             _scale;

 public:

  // construct a reporter that reports memory usage

  // in specified scale

  BaselineReporter(BaselineOutputer& outputer, size_t scale = K):

    _outputer(outputer) {

    _scale = scale;

  }

  virtual void report_baseline(const MemBaseline& baseline, bool summary_only = false);

  virtual void diff_baselines(const MemBaseline& cur, const MemBaseline& prev,

                              bool summary_only = false);

  void set_scale(size_t scale);

  size_t scale() const { return _scale; }

 private:

  void report_summaries(const MemBaseline& baseline);

  void report_callsites(const MemBaseline& baseline);

  void diff_summaries(const MemBaseline& cur, const MemBaseline& prev);

  void diff_callsites(const MemBaseline& cur, const MemBaseline& prev);

  // calculate memory size in current memory scale

  size_t amount_in_current_scale(size_t amt) const;

  // diff two unsigned values in current memory scale

  int    diff_in_current_scale(size_t value1, size_t value2) const;

  // diff two unsigned value

  int    diff(size_t value1, size_t value2) const;

};

/*

 * tty output implementation. Native memory tracking

 * DCmd uses this outputer.

 */

class BaselineTTYOutputer : public BaselineOutputer {

 private:

  size_t         _scale;

  size_t         _num_of_classes;

  size_t         _num_of_threads;

  size_t         _thread_stack_reserved;

  size_t         _thread_stack_committed;

  int            _num_of_classes_diff;

  int            _num_of_threads_diff;

  int            _thread_stack_reserved_diff;

  int            _thread_stack_committed_diff;

  outputStream*  _output;

 public:

  BaselineTTYOutputer(outputStream* st) {

    _scale = K;

    _num_of_classes = 0;

    _num_of_threads = 0;

    _thread_stack_reserved = 0;

    _thread_stack_committed = 0;

    _num_of_classes_diff = 0;

    _num_of_threads_diff = 0;

    _thread_stack_reserved_diff = 0;

    _thread_stack_committed_diff = 0;

    _output = st;

  }

  // begin reporting memory usage in specified scale

  void start(size_t scale, bool report_diff = false);

  // done reporting

  void done();

  // total memory usage

  void total_usage(size_t total_reserved,

                   size_t total_committed);

  // report total loaded classes

  void num_of_classes(size_t classes) {

    _num_of_classes = classes;

  }

  void num_of_threads(size_t threads) {

    _num_of_threads = threads;

  }

  void thread_info(size_t stack_reserved_amt, size_t stack_committed_amt) {

    _thread_stack_reserved = stack_reserved_amt;

    _thread_stack_committed = stack_committed_amt;

  }

  void diff_total_usage(size_t total_reserved,

                        size_t total_committed,

                        int reserved_diff,

                        int committed_diff);

  void diff_num_of_classes(size_t classes, int diff) {

    _num_of_classes = classes;

    _num_of_classes_diff = diff;

  }

  void diff_num_of_threads(size_t threads, int diff) {

    _num_of_threads = threads;

    _num_of_threads_diff = diff;

  }

  void diff_thread_info(size_t stack_reserved_amt, size_t stack_committed_amt,

               int stack_reserved_diff, int stack_committed_diff) {

    _thread_stack_reserved = stack_reserved_amt;

    _thread_stack_committed = stack_committed_amt;

    _thread_stack_reserved_diff = stack_reserved_diff;

    _thread_stack_committed_diff = stack_committed_diff;

  }

  /*

   * Report memory summary categoriuzed by memory types.

   * For each memory type, following summaries are reported:

   *  - reserved amount, committed amount

   *  - malloc-ed amount, malloc count

   *  - arena amount, arena count

   */

  // start reporting memory summary by memory type

  void start_category_summary();

  void category_summary(MEMFLAGS type, size_t reserved_amt, size_t committed_amt,

                               size_t malloc_amt, size_t malloc_count,

                               size_t arena_amt, size_t arena_count);

  void diff_category_summary(MEMFLAGS type, size_t cur_reserved_amt,

                          size_t cur_committed_amt,

                          size_t cur_malloc_amt, size_t cur_malloc_count,

                          size_t cur_arena_amt, size_t cur_arena_count,

                          int reserved_diff, int committed_diff, int malloc_diff,

                          int malloc_count_diff, int arena_diff,

                          int arena_count_diff);

  void done_category_summary();

  /*

   *  Report callsite information

   */

  void start_callsite();

  void malloc_callsite(address pc, size_t malloc_amt, size_t malloc_count);

  void virtual_memory_callsite(address pc, size_t reserved_amt, size_t committed_amt);

  void diff_malloc_callsite(address pc, size_t cur_malloc_amt, size_t cur_malloc_count,

              int malloc_diff, int malloc_count_diff);

  void diff_virtual_memory_callsite(address pc, size_t cur_reserved_amt, size_t cur_committed_amt,

              int reserved_diff, int committed_diff);

  void done_callsite();

};

#endif // SHARE_VM_SERVICES_MEM_REPORTER_HPP