wtf/RefCountedLeakCounter.cpp

   1 /*
   2  *  Copyright (C) 2008 Apple Inc. All rights reserved.
   3  *
   4  *  This library is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU Library General Public
   6  *  License as published by the Free Software Foundation; either
   7  *  version 2 of the License, or (at your option) any later version.
   8  *
   9  *  This library is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  *  Library General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU Library General Public License
  15  *  along with this library; see the file COPYING.LIB.  If not, write to
  16  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  *  Boston, MA 02110-1301, USA.
  18  *
  19  */
  20
  21 #include "config.h"
  22 #include "RefCountedLeakCounter.h"
  23
  24 #include <wtf/HashCountedSet.h>
  25
  26 namespace WTF {
  27
  28 #ifdef NDEBUG
  29
  30 void RefCountedLeakCounter::suppressMessages(const char*) { }
  31 void RefCountedLeakCounter::cancelMessageSuppression(const char*) { }
  32
  33 RefCountedLeakCounter::RefCountedLeakCounter(const char*) { }
  34 RefCountedLeakCounter::~RefCountedLeakCounter() { }
  35
  36 void RefCountedLeakCounter::increment() { }
  37 void RefCountedLeakCounter::decrement() { }
  38
  39 #else
  40
  41 #define LOG_CHANNEL_PREFIX Log
  42 static WTFLogChannel LogRefCountedLeaks = { 0x00000000, "", WTFLogChannelOn };
  43
  44 typedef HashCountedSet<const char*, PtrHash<const char*> > ReasonSet;
  45 static ReasonSet* leakMessageSuppressionReasons;
  46
  47 void RefCountedLeakCounter::suppressMessages(const char* reason)
  48 {
  49     if (!leakMessageSuppressionReasons)
  50         leakMessageSuppressionReasons = new ReasonSet;
  51     leakMessageSuppressionReasons->add(reason);
  52 }
  53
  54 void RefCountedLeakCounter::cancelMessageSuppression(const char* reason)
  55 {
  56     ASSERT(leakMessageSuppressionReasons);
  57     ASSERT(leakMessageSuppressionReasons->contains(reason));
  58     leakMessageSuppressionReasons->remove(reason);
  59 }
  60
  61 RefCountedLeakCounter::RefCountedLeakCounter(const char* description)
  62     : m_description(description)
  63 {
  64 }
  65
  66 RefCountedLeakCounter::~RefCountedLeakCounter()
  67 {
  68     static bool loggedSuppressionReason;
  69     if (m_count) {
  70         if (!leakMessageSuppressionReasons || leakMessageSuppressionReasons->isEmpty())
  71             LOG(RefCountedLeaks, "LEAK: %u %s", m_count, m_description);
  72         else if (!loggedSuppressionReason) {
  73             // This logs only one reason. Later we could change it so we log all the reasons.
  74             LOG(RefCountedLeaks, "No leak checking done: %s", leakMessageSuppressionReasons->begin()->first);
  75             loggedSuppressionReason = true;
  76         }
  77     }
  78 }
  79
  80 void RefCountedLeakCounter::increment()
  81 {
  82 #if ENABLE(JSC_MULTIPLE_THREADS)
  83     atomicIncrement(&m_count);
  84 #else
  85     ++m_count;
  86 #endif
  87 }
  88
  89 void RefCountedLeakCounter::decrement()
  90 {
  91 #if ENABLE(JSC_MULTIPLE_THREADS)
  92     atomicDecrement(&m_count);
  93 #else
  94     --m_count;
  95 #endif
  96 }
  97
  98 #endif
  99
 100 } // namespace WTF