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      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
    101