heap/HeapStatistics.h

   1 /*
   2  * Copyright (C) 2012 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  23  * THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef HeapStatistics_h
  27 #define HeapStatistics_h
  28
  29 #include "JSExportMacros.h"
  30 #include <wtf/Deque.h>
  31
  32 namespace JSC {
  33
  34 class Heap;
  35
  36 class HeapStatistics {
  37 public:
  38     NO_RETURN static void exitWithFailure();
  39     JS_EXPORT_PRIVATE static void reportSuccess();
  40
  41     static void initialize();
  42     static void recordGCPauseTime(double start, double end);
  43     static size_t parseMemoryAmount(char*);
  44
  45     static void showObjectStatistics(Heap*);
  46
  47     static const size_t KB = 1024;
  48     static const size_t MB = 1024 * KB;
  49     static const size_t GB = 1024 * MB;
  50
  51 private:
  52     static void logStatistics();
  53     static Vector<double>* s_pauseTimeStarts;
  54     static Vector<double>* s_pauseTimeEnds;
  55     static double s_startTime;
  56     static double s_endTime;
  57 };
  58
  59 } // namespace JSC
  60
  61 #endif