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juce_HeavyweightLeakedObjectDetector.h
1/*
2 ==============================================================================
3
4 This file is part of the JUCE library.
5 Copyright (c) 2017 - ROLI Ltd.
6
7 JUCE is an open source library subject to commercial or open-source
8 licensing.
9
10 The code included in this file is provided under the terms of the ISC license
11 http://www.isc.org/downloads/software-support-policy/isc-license. Permission
12 To use, copy, modify, and/or distribute this software for any purpose with or
13 without fee is hereby granted provided that the above copyright notice and
14 this permission notice appear in all copies.
15
16 JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
17 EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
18 DISCLAIMED.
19
20 ==============================================================================
21*/
22
23 namespace juce
24{
25
26//==============================================================================
42 template <class OwnerClass>
43 class HeavyweightLeakedObjectDetector
44{
45 public:
46 //==============================================================================
47 HeavyweightLeakedObjectDetector() noexcept { getBacktraceMap()[this] = SystemStats::getStackBacktrace(); }
48 HeavyweightLeakedObjectDetector (const HeavyweightLeakedObjectDetector&) noexcept { getBacktraceMap()[this] = SystemStats::getStackBacktrace(); }
49
50 ~HeavyweightLeakedObjectDetector() { getBacktraceMap().erase (this); }
51
52 private:
53 //==============================================================================
54 typedef std::map<HeavyweightLeakedObjectDetector<OwnerClass>*, String> BacktraceMap;
55
56 //==============================================================================
57 struct BacktraceMapHolder
58 {
59 BacktraceMapHolder() = default;
60
61 ~BacktraceMapHolder()
62 {
63 if (map.size() > 0)
64 {
65 DBG ("*** Leaked objects detected: " << map.size() << " instance(s) of class " << getLeakedObjectClassName());
66 DBG (getFormattedBacktracesString());
67
76 jassertfalse;
77 }
78 }
79
80 String getFormattedBacktracesString() const
81 {
82 String str;
83
84 int counter = 1;
85 for (auto& bt : map)
86 {
87 str << "\nBacktrace " << String (counter++) << "\n"
88 << "-----------------------------------------------------------------" << "\n"
89 << bt.second;
90 }
91
92 return str;
93 }
94
95 BacktraceMap map;
96 };
97
98 static BacktraceMap& getBacktraceMap()
99 {
100 static BacktraceMapHolder holder;
101 return holder.map;
102 }
103
104 static const char* getLeakedObjectClassName()
105 {
106 return OwnerClass::getLeakedObjectClassName();
107 }
108};
109
110//==============================================================================
111#if DOXYGEN || ! defined (JUCE_HEAVYWEIGHT_LEAK_DETECTOR)
112 #if (DOXYGEN || JUCE_CHECK_MEMORY_LEAKS)
135 #define JUCE_HEAVYWEIGHT_LEAK_DETECTOR(OwnerClass) \
136 friend class juce::HeavyweightLeakedObjectDetector<OwnerClass>; \
137 static const char* getLeakedObjectClassName() noexcept { return #OwnerClass; } \
138 juce::HeavyweightLeakedObjectDetector<OwnerClass> JUCE_JOIN_MACRO (leakDetector, __LINE__);
139 #else
140 #define JUCE_HEAVYWEIGHT_LEAK_DETECTOR(OwnerClass)
141 #endif
142#endif
143
144} // namespace juce
juce::HeavyweightLeakedObjectDetector
Definition: juce_HeavyweightLeakedObjectDetector.h:44
juce::String
Definition: juce_String.h:39
juce::SystemStats::getStackBacktrace
static String getStackBacktrace()
Definition: juce_SystemStats.cpp:137