/*

 * Copyright (c) 1998, 2017, 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.

 *

 */

#include "precompiled.hpp"

#include "classfile/systemDictionary.hpp"

#include "code/codeCache.hpp"

#include "gc/shared/collectedHeap.inline.hpp"

#include "gc/shared/generation.hpp"

#include "interpreter/oopMapCache.hpp"

#include "memory/resourceArea.hpp"

#include "runtime/handles.inline.hpp"

#include "runtime/jniHandles.hpp"

#include "runtime/memprofiler.hpp"

#include "runtime/mutexLocker.hpp"

#include "runtime/os.hpp"

#include "runtime/task.hpp"

#include "runtime/thread.inline.hpp"

#include "runtime/vmThread.hpp"

#ifndef PRODUCT

// --------------------------------------------------------

// MemProfilerTask

class MemProfilerTask : public PeriodicTask {

 public:

  MemProfilerTask(int interval_time) : PeriodicTask(interval_time) {}

  void task();

};

void MemProfilerTask::task() {

  // Get thread lock to provide mutual exclusion, and so we can iterate safely over the thread list.

  MutexLocker mu(Threads_lock);

  MemProfiler::do_trace();

}

//----------------------------------------------------------

// Implementation of MemProfiler

MemProfilerTask* MemProfiler::_task   = NULL;

FILE*            MemProfiler::_log_fp = NULL;

bool MemProfiler::is_active() {

  return _task != NULL;

}

void MemProfiler::engage() {

  const char *log_name = "mprofile.log";

  if (!is_active()) {

    // Create log file

    _log_fp = fopen(log_name , "w+");

    if (_log_fp == NULL) {

      fatal("MemProfiler: Cannot create log file: %s", log_name);

    }

    fprintf(_log_fp, "MemProfiler: sizes are in Kb, time is in seconds since startup\n\n");

    fprintf(_log_fp, "  time, #thr, #cls,  heap,  heap,  perm,  perm,  code, hndls, rescs, oopmp\n");

    fprintf(_log_fp, "                     used, total,  used, total, total, total, total, total\n");

    fprintf(_log_fp, "--------------------------------------------------------------------------\n");

    _task = new MemProfilerTask(MemProfilingInterval);

    _task->enroll();

  }

}

void MemProfiler::disengage() {

  if (!is_active()) return;

  // Do one last trace at disengage time

  do_trace();

  // Close logfile

  fprintf(_log_fp, "MemProfiler detached\n");

  fclose(_log_fp);

  // remove MemProfilerTask

  assert(_task != NULL, "sanity check");

  _task->disenroll();

  delete _task;

  _task = NULL;

}

void MemProfiler::do_trace() {

  // Calculate thread local sizes

  size_t handles_memory_usage    = VMThread::vm_thread()->handle_area()->size_in_bytes();

  size_t resource_memory_usage   = VMThread::vm_thread()->resource_area()->size_in_bytes();

  JavaThread *cur = Threads::first();

  while (cur != NULL) {

    handles_memory_usage  += cur->handle_area()->size_in_bytes();

    resource_memory_usage += cur->resource_area()->size_in_bytes();

    cur = cur->next();

  }

  // Print trace line in log

  fprintf(_log_fp, "%6.1f,%5d,%5d," UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) ",",

          os::elapsedTime(),

          Threads::number_of_threads(),

          InstanceKlass::number_of_instance_classes(),

          Universe::heap()->used() / K,

          Universe::heap()->capacity() / K);

  fprintf(_log_fp, UINTX_FORMAT_W(6) ",", CodeCache::capacity() / K);

  fprintf(_log_fp, UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) ",%6ld\n",

          handles_memory_usage / K,

          resource_memory_usage / K,

          0L);

  fflush(_log_fp);

}

#endif