qv4mm_p.h

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qv4mm_p.h

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1	/****************************************************************************	-
2	**	-
3	** Copyright (C) 2016 The Qt Company Ltd.	-
4	** Contact: https://www.qt.io/licensing/	-
5	**	-
6	** This file is part of the QtQml module of the Qt Toolkit.	-
7	**	-
8	** $QT_BEGIN_LICENSE:LGPL$	-
9	** Commercial License Usage	-
10	** Licensees holding valid commercial Qt licenses may use this file in	-
11	** accordance with the commercial license agreement provided with the	-
12	** Software or, alternatively, in accordance with the terms contained in	-
13	** a written agreement between you and The Qt Company. For licensing terms	-
14	** and conditions see https://www.qt.io/terms-conditions. For further	-
15	** information use the contact form at https://www.qt.io/contact-us.	-
16	**	-
17	** GNU Lesser General Public License Usage	-
18	** Alternatively, this file may be used under the terms of the GNU Lesser	-
19	** General Public License version 3 as published by the Free Software	-
20	** Foundation and appearing in the file LICENSE.LGPL3 included in the	-
21	** packaging of this file. Please review the following information to	-
22	** ensure the GNU Lesser General Public License version 3 requirements	-
23	** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.	-
24	**	-
25	** GNU General Public License Usage	-
26	** Alternatively, this file may be used under the terms of the GNU	-
27	** General Public License version 2.0 or (at your option) the GNU General	-
28	** Public license version 3 or any later version approved by the KDE Free	-
29	** Qt Foundation. The licenses are as published by the Free Software	-
30	** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3	-
31	** included in the packaging of this file. Please review the following	-
32	** information to ensure the GNU General Public License requirements will	-
33	** be met: https://www.gnu.org/licenses/gpl-2.0.html and	-
34	** https://www.gnu.org/licenses/gpl-3.0.html.	-
35	**	-
36	** $QT_END_LICENSE$	-
37	**	-
38	****************************************************************************/	-
39		-
40	#ifndef QV4GC_H	-
41	#define QV4GC_H	-
42		-
43	//	-
44	// W A R N I N G	-
45	// -------------	-
46	//	-
47	// This file is not part of the Qt API. It exists purely as an	-
48	// implementation detail. This header file may change from version to	-
49	// version without notice, or even be removed.	-
50	//	-
51	// We mean it.	-
52	//	-
53		-
54	#include <private/qv4global_p.h>	-
55	#include <private/qv4value_p.h>	-
56	#include <private/qv4scopedvalue_p.h>	-
57	#include <private/qv4object_p.h>	-
58	#include <private/qv4mmdefs_p.h>	-
59	#include <QVector>	-
60		-
61	#define QV4_MM_MAXBLOCK_SHIFT "QV4_MM_MAXBLOCK_SHIFT"	-
62	#define QV4_MM_MAX_CHUNK_SIZE "QV4_MM_MAX_CHUNK_SIZE"	-
63	#define QV4_MM_STATS "QV4_MM_STATS"	-
64		-
65	#define MM_DEBUG 0	-
66		-
67	QT_BEGIN_NAMESPACE	-
68		-
69	namespace QV4 {	-
70		-
71	struct ChunkAllocator;	-
72	struct MemorySegment;	-
73		-
74	struct BlockAllocator {	-
75	BlockAllocator(ChunkAllocator chunkAllocator, ExecutionEngine engine)	-
76	: chunkAllocator(chunkAllocator), engine(engine)	-
77	{	-
78	memset(freeBins, 0, sizeof(freeBins));	-
79	} executed 198486 times by 154 tests: `end of block` Executed by: tst_bindingdependencyapi tst_drawingmodes tst_ecmascripttests tst_examples tst_flickableinterop tst_multipointtoucharea_interop tst_parserstress tst_qjsengine tst_qjsonbinding tst_qjsvalue tst_qjsvalueiterator tst_qmlcachegen tst_qmldiskcache tst_qqmlapplicationengine tst_qqmlbinding tst_qqmlcomponent tst_qqmlconnections tst_qqmlconsole tst_qqmlcontext tst_qqmldebugclient tst_qqmldebugjs tst_qqmldebuglocal tst_qqmldebugservice tst_qqmlecmascript tst_qqmlenginecleanup ...	198486
80		-
81	enum { NumBins = 8 };	-
82		-
83	static inline size_t binForSlots(size_t nSlots) {	-
84	return nSlots >= NumBins ? NumBins - 1 : nSlots; executed 338636 times by 18 tests: `return nSlots >= NumBins ? NumBins - 1 : nSlots;` Executed by: tst_ecmascripttests tst_examples tst_qjsengine tst_qqmlecmascript tst_qqmlnotifier tst_qqmlqt tst_qquickanimationcontroller tst_qquickdrag tst_qquickdroparea tst_qquickgridview tst_qquicklayouts tst_qquicklistview tst_qquickpositioners tst_qquickvisualdatamodel tst_quicktestmainwithsetup tst_qv4mm tst_scenegraph tst_testfiltering	338636
85	}	-
86		-
87	HeapItem *allocate(size_t size, bool forceAllocation = false);	-
88		-
89	size_t totalSlots() const {	-
90	return Chunk::AvailableSlotschunks.size(); executed 295129 times by 154 tests: `return Chunk::AvailableSlotschunks.size();` Executed by: tst_bindingdependencyapi tst_drawingmodes tst_ecmascripttests tst_examples tst_flickableinterop tst_multipointtoucharea_interop tst_parserstress tst_qjsengine tst_qjsonbinding tst_qjsvalue tst_qjsvalueiterator tst_qmlcachegen tst_qmldiskcache tst_qqmlapplicationengine tst_qqmlbinding tst_qqmlcomponent tst_qqmlconnections tst_qqmlconsole tst_qqmlcontext tst_qqmldebugclient tst_qqmldebugjs tst_qqmldebuglocal tst_qqmldebugservice tst_qqmlecmascript tst_qqmlenginecleanup ...	295129
91	}	-
92		-
93	size_t allocatedMem() const {	-
94	return chunks.size()Chunk::DataSize; executed 22 times by 2 tests: `return chunks.size()Chunk::DataSize;` Executed by: tst_qqmlprofilerservice tst_qv4mm	22
95	}	-
96	size_t usedMem() const {	-
97	uint used = 0;	-
98	for (auto c : chunks)	-
99	used += c->nUsedSlots()Chunk::SlotSize; executed 70 times by 2 tests: `used += c->nUsedSlots()Chunk::SlotSize;` Executed by: tst_qqmlprofilerservice tst_qv4mm	70
100	return used; executed 28 times by 2 tests: `return used;` Executed by: tst_qqmlprofilerservice tst_qv4mm	28
101	}	-
102		-
103	void sweep();	-
104	void freeAll();	-
105	void resetBlackBits();	-
106	void collectGrayItems(MarkStack *markStack);	-
107		-
108	// bump allocations	-
109	HeapItem *nextFree = nullptr;	-
110	size_t nFree = 0;	-
111	size_t usedSlotsAfterLastSweep = 0;	-
112	HeapItem *freeBins[NumBins];	-
113	ChunkAllocator *chunkAllocator;	-
114	ExecutionEngine *engine;	-
115	std::vector<Chunk *> chunks;	-
116	uint *allocationStats = nullptr;	-
117	};	-
118		-
119	struct HugeItemAllocator {	-
120	HugeItemAllocator(ChunkAllocator chunkAllocator, ExecutionEngine engine)	-
121	: chunkAllocator(chunkAllocator), engine(engine)	-
122	{} executed 99244 times by 154 tests: `end of block` Executed by: tst_bindingdependencyapi tst_drawingmodes tst_ecmascripttests tst_examples tst_flickableinterop tst_multipointtoucharea_interop tst_parserstress tst_qjsengine tst_qjsonbinding tst_qjsvalue tst_qjsvalueiterator tst_qmlcachegen tst_qmldiskcache tst_qqmlapplicationengine tst_qqmlbinding tst_qqmlcomponent tst_qqmlconnections tst_qqmlconsole tst_qqmlcontext tst_qqmldebugclient tst_qqmldebugjs tst_qqmldebuglocal tst_qqmldebugservice tst_qqmlecmascript tst_qqmlenginecleanup ...	99244
123		-
124	HeapItem *allocate(size_t size);	-
125	void sweep(ClassDestroyStatsCallback classCountPtr);	-
126	void freeAll();	-
127	void resetBlackBits();	-
128	void collectGrayItems(MarkStack *markStack);	-
129		-
130	size_t usedMem() const {	-
131	size_t used = 0;	-
132	for (const auto &c : chunks)	-
133	used += c.size; never executed: `used += c.size;`	0
134	return used; executed 30 times by 2 tests: `return used;` Executed by: tst_qqmlprofilerservice tst_qv4mm	30
135	}	-
136		-
137	ChunkAllocator *chunkAllocator;	-
138	ExecutionEngine *engine;	-
139	struct HugeChunk {	-
140	MemorySegment *segment;	-
141	Chunk *chunk;	-
142	size_t size;	-
143	};	-
144		-
145	std::vector<HugeChunk> chunks;	-
146	};	-
147		-
148		-
149	class Q_QML_EXPORT MemoryManager	-
150	{	-
151	Q_DISABLE_COPY(MemoryManager);	-
152		-
153	public:	-
154	MemoryManager(ExecutionEngine *engine);	-
155	~MemoryManager();	-
156		-
157	// TODO: this is only for 64bit (and x86 with SSE/AVX), so exend it for other architectures to be slightly more efficient (meaning, align on 8-byte boundaries).	-
158	// Note: all occurrences of "16" in alloc/dealloc are also due to the alignment.	-
159	Q_DECL_CONSTEXPR static inline std::size_t align(std::size_t size)	-
160	{ return (size + Chunk::SlotSize - 1) & ~(Chunk::SlotSize - 1); }	-
161		-
162	template<typename ManagedType>	-
163	inline typename ManagedType::Data allocManaged(std::size_t size, Heap::InternalClass ic)	-
164	{	-
165	Q_STATIC_ASSERT(std::is_trivial< typename ManagedType::Data >::value);	-
166	size = align(size);	-
167	typename ManagedType::Data d = static_cast<typename ManagedType::Data >(allocData(size));	-
168	d->internalClass.set(engine, ic);	-
169	Q_ASSERT(d->internalClass && d->internalClass->vtable);	-
170	Q_ASSERT(ic->vtable == ManagedType::staticVTable());	-
171	return d; executed 114353539 times by 154 tests: `return d;` Executed by: tst_bindingdependencyapi tst_drawingmodes tst_ecmascripttests tst_examples tst_flickableinterop tst_multipointtoucharea_interop tst_parserstress tst_qjsengine tst_qjsonbinding tst_qjsvalue tst_qjsvalueiterator tst_qmlcachegen tst_qmldiskcache tst_qqmlapplicationengine tst_qqmlbinding tst_qqmlcomponent tst_qqmlconnections tst_qqmlconsole tst_qqmlcontext tst_qqmldebugclient tst_qqmldebugjs tst_qqmldebuglocal tst_qqmldebugservice tst_qqmlecmascript tst_qqmlenginecleanup ...	114353539
172	}	-
173		-
174	template<typename ManagedType>	-
175	inline typename ManagedType::Data allocManaged(std::size_t size, InternalClass ic)	-
176	{	-
177	return allocManaged<ManagedType>(size, ic->d()); executed 109486049 times by 154 tests: `return allocManaged<ManagedType>(size, ic->d());` Executed by: tst_bindingdependencyapi tst_drawingmodes tst_ecmascripttests tst_examples tst_flickableinterop tst_multipointtoucharea_interop tst_parserstress tst_qjsengine tst_qjsonbinding tst_qjsvalue tst_qjsvalueiterator tst_qmlcachegen tst_qmldiskcache tst_qqmlapplicationengine tst_qqmlbinding tst_qqmlcomponent tst_qqmlconnections tst_qqmlconsole tst_qqmlcontext tst_qqmldebugclient tst_qqmldebugjs tst_qqmldebuglocal tst_qqmldebugservice tst_qqmlecmascript tst_qqmlenginecleanup ...	109486049
178	}	-
179		-
180	template<typename ManagedType>	-
181	inline typename ManagedType::Data *allocManaged(std::size_t size)	-
182	{	-
183	Scope scope(engine);	-
184	Scoped<InternalClass> ic(scope, ManagedType::defaultInternalClass(engine));	-
185	return allocManaged<ManagedType>(size, ic); executed 109641468 times by 154 tests: `return allocManaged<ManagedType>(size, ic);` Executed by: tst_bindingdependencyapi tst_drawingmodes tst_ecmascripttests tst_examples tst_flickableinterop tst_multipointtoucharea_interop tst_parserstress tst_qjsengine tst_qjsonbinding tst_qjsvalue tst_qjsvalueiterator tst_qmlcachegen tst_qmldiskcache tst_qqmlapplicationengine tst_qqmlbinding tst_qqmlcomponent tst_qqmlconnections tst_qqmlconsole tst_qqmlcontext tst_qqmldebugclient tst_qqmldebugjs tst_qqmldebuglocal tst_qqmldebugservice tst_qqmlecmascript tst_qqmlenginecleanup ...	109641468
186	}	-
187		-
188	template <typename ObjectType>	-
189	typename ObjectType::Data allocateObject(Heap::InternalClass ic)	-
190	{	-
191	Heap::Object *o = allocObjectWithMemberData(ObjectType::staticVTable(), ic->size);	-
192	o->internalClass.set(engine, ic);	-
193	Q_ASSERT(o->internalClass.get() && o->vtable());	-
194	Q_ASSERT(o->vtable() == ObjectType::staticVTable());	-
195	return static_cast<typename ObjectType::Data >(o); executed 53984069 times by 154 tests: `return static_cast<typename ObjectType::Data >(o);` Executed by: tst_bindingdependencyapi tst_drawingmodes tst_ecmascripttests tst_examples tst_flickableinterop tst_multipointtoucharea_interop tst_parserstress tst_qjsengine tst_qjsonbinding tst_qjsvalue tst_qjsvalueiterator tst_qmlcachegen tst_qmldiskcache tst_qqmlapplicationengine tst_qqmlbinding tst_qqmlcomponent tst_qqmlconnections tst_qqmlconsole tst_qqmlcontext tst_qqmldebugclient tst_qqmldebugjs tst_qqmldebuglocal tst_qqmldebugservice tst_qqmlecmascript tst_qqmlenginecleanup ...	53984069
196	}	-
197		-
198	template <typename ObjectType>	-
199	typename ObjectType::Data allocateObject(InternalClass ic)	-
200	{	-
201	return allocateObject<ObjectType>(ic->d()); executed 45959685 times by 154 tests: `return allocateObject<ObjectType>(ic->d());` Executed by: tst_bindingdependencyapi tst_drawingmodes tst_ecmascripttests tst_examples tst_flickableinterop tst_multipointtoucharea_interop tst_parserstress tst_qjsengine tst_qjsonbinding tst_qjsvalue tst_qjsvalueiterator tst_qmlcachegen tst_qmldiskcache tst_qqmlapplicationengine tst_qqmlbinding tst_qqmlcomponent tst_qqmlconnections tst_qqmlconsole tst_qqmlcontext tst_qqmldebugclient tst_qqmldebugjs tst_qqmldebuglocal tst_qqmldebugservice tst_qqmlecmascript tst_qqmlenginecleanup ...	45959685
202	}	-
203		-
204	template <typename ObjectType>	-
205	typename ObjectType::Data *allocateObject()	-
206	{	-
207	Scope scope(engine);	-
208	Scoped<InternalClass> ic(scope, ObjectType::defaultInternalClass(engine));	-
209	ic = ic->changeVTable(ObjectType::staticVTable());	-
210	ic = ic->changePrototype(ObjectType::defaultPrototype(engine)->d());	-
211	return allocateObject<ObjectType>(ic); executed 45918127 times by 154 tests: `return allocateObject<ObjectType>(ic);` Executed by: tst_bindingdependencyapi tst_drawingmodes tst_ecmascripttests tst_examples tst_flickableinterop tst_multipointtoucharea_interop tst_parserstress tst_qjsengine tst_qjsonbinding tst_qjsvalue tst_qjsvalueiterator tst_qmlcachegen tst_qmldiskcache tst_qqmlapplicationengine tst_qqmlbinding tst_qqmlcomponent tst_qqmlconnections tst_qqmlconsole tst_qqmlcontext tst_qqmldebugclient tst_qqmldebugjs tst_qqmldebuglocal tst_qqmldebugservice tst_qqmlecmascript tst_qqmlenginecleanup ...	45918127
212	}	-
213		-
214	template <typename ManagedType, typename Arg1>	-
215	typename ManagedType::Data *allocWithStringData(std::size_t unmanagedSize, Arg1 arg1)	-
216	{	-
217	typename ManagedType::Data o = reinterpret_cast<typename ManagedType::Data >(allocString(unmanagedSize));	-
218	o->internalClass.set(engine, ManagedType::defaultInternalClass(engine));	-
219	Q_ASSERT(o->internalClass && o->internalClass->vtable);	-
220	o->init(arg1);	-
221	return o; executed 136169219 times by 154 tests: `return o;` Executed by: tst_bindingdependencyapi tst_drawingmodes tst_ecmascripttests tst_examples tst_flickableinterop tst_multipointtoucharea_interop tst_parserstress tst_qjsengine tst_qjsonbinding tst_qjsvalue tst_qjsvalueiterator tst_qmlcachegen tst_qmldiskcache tst_qqmlapplicationengine tst_qqmlbinding tst_qqmlcomponent tst_qqmlconnections tst_qqmlconsole tst_qqmlcontext tst_qqmldebugclient tst_qqmldebugjs tst_qqmldebuglocal tst_qqmldebugservice tst_qqmlecmascript tst_qqmlenginecleanup ...	136169219
222	}	-
223		-
224	template <typename ObjectType, typename... Args>	-
225	typename ObjectType::Data allocObject(Heap::InternalClass ic, Args... args)	-
226	{	-
227	typename ObjectType::Data *d = allocateObject<ObjectType>(ic);	-
228	d->init(args...);	-
229	return d; executed 7987204 times by 154 tests: `return d;` Executed by: tst_bindingdependencyapi tst_drawingmodes tst_ecmascripttests tst_examples tst_flickableinterop tst_multipointtoucharea_interop tst_parserstress tst_qjsengine tst_qjsonbinding tst_qjsvalue tst_qjsvalueiterator tst_qmlcachegen tst_qmldiskcache tst_qqmlapplicationengine tst_qqmlbinding tst_qqmlcomponent tst_qqmlconnections tst_qqmlconsole tst_qqmlcontext tst_qqmldebugclient tst_qqmldebugjs tst_qqmldebuglocal tst_qqmldebugservice tst_qqmlecmascript tst_qqmlenginecleanup ...	7987204
230	}	-
231		-
232	template <typename ObjectType, typename... Args>	-
233	typename ObjectType::Data allocObject(InternalClass ic, Args... args)	-
234	{	-
235	typename ObjectType::Data *d = allocateObject<ObjectType>(ic);	-
236	d->init(args...);	-
237	return d; executed 14647 times by 3 tests: `return d;` Executed by: tst_ecmascripttests tst_qjsvalue tst_qqmlecmascript	14647
238	}	-
239		-
240	template <typename ObjectType, typename... Args>	-
241	typename ObjectType::Data *allocate(Args... args)	-
242	{	-
243	Scope scope(engine);	-
244	Scoped<ObjectType> t(scope, allocateObject<ObjectType>());	-
245	t->d_unchecked()->init(args...);	-
246	return t->d(); executed 45977232 times by 154 tests: `return t->d();` Executed by: tst_bindingdependencyapi tst_drawingmodes tst_ecmascripttests tst_examples tst_flickableinterop tst_multipointtoucharea_interop tst_parserstress tst_qjsengine tst_qjsonbinding tst_qjsvalue tst_qjsvalueiterator tst_qmlcachegen tst_qmldiskcache tst_qqmlapplicationengine tst_qqmlbinding tst_qqmlcomponent tst_qqmlconnections tst_qqmlconsole tst_qqmlcontext tst_qqmldebugclient tst_qqmldebugjs tst_qqmldebuglocal tst_qqmldebugservice tst_qqmlecmascript tst_qqmlenginecleanup ...	45977232
247	}	-
248		-
249	template <typename ManagedType, typename... Args>	-
250	typename ManagedType::Data *alloc(Args... args)	-
251	{	-
252	Scope scope(engine);	-
253	Scoped<ManagedType> t(scope, allocManaged<ManagedType>(sizeof(typename ManagedType::Data)));	-
254	t->d_unchecked()->init(args...);	-
255	return t->d(); executed 60779258 times by 154 tests: `return t->d();` Executed by: tst_bindingdependencyapi tst_drawingmodes tst_ecmascripttests tst_examples tst_flickableinterop tst_multipointtoucharea_interop tst_parserstress tst_qjsengine tst_qjsonbinding tst_qjsvalue tst_qjsvalueiterator tst_qmlcachegen tst_qmldiskcache tst_qqmlapplicationengine tst_qqmlbinding tst_qqmlcomponent tst_qqmlconnections tst_qqmlconsole tst_qqmlcontext tst_qqmldebugclient tst_qqmldebugjs tst_qqmldebuglocal tst_qqmldebugservice tst_qqmlecmascript tst_qqmlenginecleanup ...	60779258
256	}	-
257		-
258	void runGC();	-
259		-
260	void dumpStats() const;	-
261		-
262	size_t getUsedMem() const;	-
263	size_t getAllocatedMem() const;	-
264	size_t getLargeItemsMem() const;	-
265		-
266	// called when a JS object grows itself. Specifically: Heap::String::append	-
267	void changeUnmanagedHeapSizeUsage(qptrdiff delta) { unmanagedHeapSize += delta; } executed 170433955 times by 154 tests: `end of block` Executed by: tst_bindingdependencyapi tst_drawingmodes tst_ecmascripttests tst_examples tst_flickableinterop tst_multipointtoucharea_interop tst_parserstress tst_qjsengine tst_qjsonbinding tst_qjsvalue tst_qjsvalueiterator tst_qmlcachegen tst_qmldiskcache tst_qqmlapplicationengine tst_qqmlbinding tst_qqmlcomponent tst_qqmlconnections tst_qqmlconsole tst_qqmlcontext tst_qqmldebugclient tst_qqmldebugjs tst_qqmldebuglocal tst_qqmldebugservice tst_qqmlecmascript tst_qqmlenginecleanup ...	170433955
268		-
269	template<typename ManagedType>	-
270	typename ManagedType::Data *allocIC()	-
271	{	-
272	size_t size = align(sizeof(typename ManagedType::Data));	-
273	Heap::Base b = icAllocator.allocate(size, true);	-
274	return static_cast<typename ManagedType::Data >(b); executed 72406692 times by 154 tests: `return static_cast<typename ManagedType::Data >(b);` Executed by: tst_bindingdependencyapi tst_drawingmodes tst_ecmascripttests tst_examples tst_flickableinterop tst_multipointtoucharea_interop tst_parserstress tst_qjsengine tst_qjsonbinding tst_qjsvalue tst_qjsvalueiterator tst_qmlcachegen tst_qmldiskcache tst_qqmlapplicationengine tst_qqmlbinding tst_qqmlcomponent tst_qqmlconnections tst_qqmlconsole tst_qqmlcontext tst_qqmldebugclient tst_qqmldebugjs tst_qqmldebuglocal tst_qqmldebugservice tst_qqmlecmascript tst_qqmlenginecleanup ...	72406692
275	}	-
276		-
277	protected:	-
278	/// expects size to be aligned	-
279	Heap::Base *allocString(std::size_t unmanagedSize);	-
280	Heap::Base *allocData(std::size_t size);	-
281	Heap::Object allocObjectWithMemberData(const QV4::VTable vtable, uint nMembers);	-
282		-
283	private:	-
284	void collectFromJSStack(MarkStack *markStack) const;	-
285	void mark();	-
286	void sweep(bool lastSweep = false, ClassDestroyStatsCallback classCountPtr = nullptr);	-
287	bool shouldRunGC() const;	-
288	void collectRoots(MarkStack *markStack);	-
289		-
290	public:	-
291	QV4::ExecutionEngine *engine;	-
292	ChunkAllocator *chunkAllocator;	-
293	BlockAllocator blockAllocator;	-
294	BlockAllocator icAllocator;	-
295	HugeItemAllocator hugeItemAllocator;	-
296	PersistentValueStorage *m_persistentValues;	-
297	PersistentValueStorage *m_weakValues;	-
298	QVector<Value *> m_pendingFreedObjectWrapperValue;	-
299		-
300	std::size_t unmanagedHeapSize = 0; // the amount of bytes of heap that is not managed by the memory manager, but which is held onto by managed items.	-
301	std::size_t unmanagedHeapSizeGCLimit;	-
302	std::size_t usedSlotsAfterLastFullSweep = 0;	-
303		-
304	bool gcBlocked = false;	-
305	bool aggressiveGC = false;	-
306	bool gcStats = false;	-
307	bool gcCollectorStats = false;	-
308		-
309	int allocationCount = 0;	-
310	size_t lastAllocRequestedSlots = 0;	-
311		-
312	struct {	-
313	size_t maxReservedMem = 0;	-
314	size_t maxAllocatedMem = 0;	-
315	size_t maxUsedMem = 0;	-
316	uint allocations[BlockAllocator::NumBins];	-
317	} statistics;	-
318	};	-
319		-
320	}	-
321		-
322	QT_END_NAMESPACE	-
323		-
324	#endif // QV4GC_H	-

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/****************************************************************************

** Contact: https://www.qt.io/licensing/

** This file is part of the QtQml module of the Qt Toolkit.

** $QT_BEGIN_LICENSE:LGPL$

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** Licensees holding valid commercial Qt licenses may use this file in

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** a written agreement between you and The Qt Company. For licensing terms

** and conditions see https://www.qt.io/terms-conditions. For further

** information use the contact form at https://www.qt.io/contact-us.

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 3 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL3 included in the

** packaging of this file. Please review the following information to

** ensure the GNU Lesser General Public License version 3 requirements

** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.

** GNU General Public License Usage

** Alternatively, this file may be used under the terms of the GNU

** General Public License version 2.0 or (at your option) the GNU General

** Public license version 3 or any later version approved by the KDE Free

** Qt Foundation. The licenses are as published by the Free Software

** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3

** included in the packaging of this file. Please review the following

** information to ensure the GNU General Public License requirements will

** be met: https://www.gnu.org/licenses/gpl-2.0.html and

** https://www.gnu.org/licenses/gpl-3.0.html.

** $QT_END_LICENSE$

****************************************************************************/

#ifndef QV4GC_H

#define QV4GC_H

// W A R N I N G

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

// This file is not part of the Qt API. It exists purely as an

// implementation detail. This header file may change from version to

// version without notice, or even be removed.

// We mean it.

#include <private/qv4global_p.h>

#include <private/qv4value_p.h>

#include <private/qv4scopedvalue_p.h>

#include <private/qv4object_p.h>

#include <private/qv4mmdefs_p.h>

#include <QVector>

#define QV4_MM_MAXBLOCK_SHIFT "QV4_MM_MAXBLOCK_SHIFT"

#define QV4_MM_MAX_CHUNK_SIZE "QV4_MM_MAX_CHUNK_SIZE"

#define QV4_MM_STATS "QV4_MM_STATS"

#define MM_DEBUG 0

QT_BEGIN_NAMESPACE

namespace QV4 {

struct ChunkAllocator;

struct MemorySegment;

struct BlockAllocator {

BlockAllocator(ChunkAllocator *chunkAllocator, ExecutionEngine *engine)

: chunkAllocator(chunkAllocator), engine(engine)

{

memset(freeBins, 0, sizeof(freeBins));

}

executed 198486 times by 154 tests: end of block

Executed by:

tst_bindingdependencyapi
tst_drawingmodes
tst_ecmascripttests
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qjsonbinding
tst_qjsvalue
tst_qjsvalueiterator
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugclient
tst_qqmldebugjs
tst_qqmldebuglocal
tst_qqmldebugservice
tst_qqmlecmascript
tst_qqmlenginecleanup
...

198486

enum { NumBins = 8 };

static inline size_t binForSlots(size_t nSlots) {

return nSlots >= NumBins ? NumBins - 1 : nSlots;

executed 338636 times by 18 tests: return nSlots >= NumBins ? NumBins - 1 : nSlots;

Executed by:

tst_ecmascripttests
tst_examples
tst_qjsengine
tst_qqmlecmascript
tst_qqmlnotifier
tst_qqmlqt
tst_qquickanimationcontroller
tst_qquickdrag
tst_qquickdroparea
tst_qquickgridview
tst_qquicklayouts
tst_qquicklistview
tst_qquickpositioners
tst_qquickvisualdatamodel
tst_quicktestmainwithsetup
tst_qv4mm
tst_scenegraph
tst_testfiltering

338636

}

HeapItem *allocate(size_t size, bool forceAllocation = false);

size_t totalSlots() const {

return Chunk::AvailableSlots*chunks.size();

executed 295129 times by 154 tests: return Chunk::AvailableSlots*chunks.size();

Executed by:

tst_bindingdependencyapi
tst_drawingmodes
tst_ecmascripttests
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qjsonbinding
tst_qjsvalue
tst_qjsvalueiterator
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugclient
tst_qqmldebugjs
tst_qqmldebuglocal
tst_qqmldebugservice
tst_qqmlecmascript
tst_qqmlenginecleanup
...

295129

}

size_t allocatedMem() const {

return chunks.size()*Chunk::DataSize;

executed 22 times by 2 tests: return chunks.size()*Chunk::DataSize;

Executed by:

tst_qqmlprofilerservice
tst_qv4mm

}

size_t usedMem() const {

uint used = 0;

for (auto c : chunks)

used += c->nUsedSlots()*Chunk::SlotSize;

executed 70 times by 2 tests: used += c->nUsedSlots()*Chunk::SlotSize;

Executed by:

tst_qqmlprofilerservice
tst_qv4mm

100

return used;

executed 28 times by 2 tests: return used;

Executed by:

tst_qqmlprofilerservice
tst_qv4mm

}

void sweep();

void freeAll();

void resetBlackBits();

106

void collectGrayItems(MarkStack *markStack);

107

108

// bump allocations

109

HeapItem *nextFree = nullptr;

110

size_t nFree = 0;

111

size_t usedSlotsAfterLastSweep = 0;

112

HeapItem *freeBins[NumBins];

113

ChunkAllocator *chunkAllocator;

114

ExecutionEngine *engine;

115

std::vector<Chunk *> chunks;

116

uint *allocationStats = nullptr;

117

};

118

119

struct HugeItemAllocator {

120

HugeItemAllocator(ChunkAllocator *chunkAllocator, ExecutionEngine *engine)

121

: chunkAllocator(chunkAllocator), engine(engine)

122

{}

executed 99244 times by 154 tests: end of block

Executed by:

tst_bindingdependencyapi
tst_drawingmodes
tst_ecmascripttests
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qjsonbinding
tst_qjsvalue
tst_qjsvalueiterator
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugclient
tst_qqmldebugjs
tst_qqmldebuglocal
tst_qqmldebugservice
tst_qqmlecmascript
tst_qqmlenginecleanup
...

99244

123

124

HeapItem *allocate(size_t size);

125

void sweep(ClassDestroyStatsCallback classCountPtr);

126

void freeAll();

127

void resetBlackBits();

128

void collectGrayItems(MarkStack *markStack);

129

130

size_t usedMem() const {

131

size_t used = 0;

132

for (const auto &c : chunks)

133

used += c.size;

never executed: used += c.size;

134

return used;

executed 30 times by 2 tests: return used;

Executed by:

tst_qqmlprofilerservice
tst_qv4mm

135

}

136

137

ChunkAllocator *chunkAllocator;

138

ExecutionEngine *engine;

139

struct HugeChunk {

140

MemorySegment *segment;

Chunk *chunk;

size_t size;

};

std::vector<HugeChunk> chunks;

};

class Q_QML_EXPORT MemoryManager

150

{

151

Q_DISABLE_COPY(MemoryManager);

152

153

public:

154

MemoryManager(ExecutionEngine *engine);

155

~MemoryManager();

156

157

// TODO: this is only for 64bit (and x86 with SSE/AVX), so exend it for other architectures to be slightly more efficient (meaning, align on 8-byte boundaries).

158

// Note: all occurrences of "16" in alloc/dealloc are also due to the alignment.

159

Q_DECL_CONSTEXPR static inline std::size_t align(std::size_t size)

160

{ return (size + Chunk::SlotSize - 1) & ~(Chunk::SlotSize - 1); }

161

162

template<typename ManagedType>

163

inline typename ManagedType::Data *allocManaged(std::size_t size, Heap::InternalClass *ic)

164

{

165

Q_STATIC_ASSERT(std::is_trivial< typename ManagedType::Data >::value);

166

size = align(size);

167

typename ManagedType::Data *d = static_cast<typename ManagedType::Data *>(allocData(size));

168

d->internalClass.set(engine, ic);

169

Q_ASSERT(d->internalClass && d->internalClass->vtable);

170

Q_ASSERT(ic->vtable == ManagedType::staticVTable());

171

return d;

executed 114353539 times by 154 tests: return d;

Executed by:

tst_bindingdependencyapi
tst_drawingmodes
tst_ecmascripttests
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qjsonbinding
tst_qjsvalue
tst_qjsvalueiterator
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugclient
tst_qqmldebugjs
tst_qqmldebuglocal
tst_qqmldebugservice
tst_qqmlecmascript
tst_qqmlenginecleanup
...

114353539

172

}

173

174

template<typename ManagedType>

175

inline typename ManagedType::Data *allocManaged(std::size_t size, InternalClass *ic)

176

{

177

return allocManaged<ManagedType>(size, ic->d());

executed 109486049 times by 154 tests: return allocManaged<ManagedType>(size, ic->d());

Executed by:

tst_bindingdependencyapi
tst_drawingmodes
tst_ecmascripttests
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qjsonbinding
tst_qjsvalue
tst_qjsvalueiterator
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugclient
tst_qqmldebugjs
tst_qqmldebuglocal
tst_qqmldebugservice
tst_qqmlecmascript
tst_qqmlenginecleanup
...

109486049

178

}

179

180

template<typename ManagedType>

181

inline typename ManagedType::Data *allocManaged(std::size_t size)

182

{

183

Scope scope(engine);

184

Scoped<InternalClass> ic(scope, ManagedType::defaultInternalClass(engine));

185

return allocManaged<ManagedType>(size, ic);

executed 109641468 times by 154 tests: return allocManaged<ManagedType>(size, ic);

Executed by:

tst_bindingdependencyapi
tst_drawingmodes
tst_ecmascripttests
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qjsonbinding
tst_qjsvalue
tst_qjsvalueiterator
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugclient
tst_qqmldebugjs
tst_qqmldebuglocal
tst_qqmldebugservice
tst_qqmlecmascript
tst_qqmlenginecleanup
...

109641468

186

}

187

188

template <typename ObjectType>

189

typename ObjectType::Data *allocateObject(Heap::InternalClass *ic)

190

{

191

Heap::Object *o = allocObjectWithMemberData(ObjectType::staticVTable(), ic->size);

192

o->internalClass.set(engine, ic);

193

Q_ASSERT(o->internalClass.get() && o->vtable());

194

Q_ASSERT(o->vtable() == ObjectType::staticVTable());

195

return static_cast<typename ObjectType::Data *>(o);

executed 53984069 times by 154 tests: return static_cast<typename ObjectType::Data *>(o);

Executed by:

tst_bindingdependencyapi
tst_drawingmodes
tst_ecmascripttests
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qjsonbinding
tst_qjsvalue
tst_qjsvalueiterator
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugclient
tst_qqmldebugjs
tst_qqmldebuglocal
tst_qqmldebugservice
tst_qqmlecmascript
tst_qqmlenginecleanup
...

53984069

196

}

197

198

template <typename ObjectType>

199

typename ObjectType::Data *allocateObject(InternalClass *ic)

200

{

201

return allocateObject<ObjectType>(ic->d());

executed 45959685 times by 154 tests: return allocateObject<ObjectType>(ic->d());

Executed by:

tst_bindingdependencyapi
tst_drawingmodes
tst_ecmascripttests
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qjsonbinding
tst_qjsvalue
tst_qjsvalueiterator
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugclient
tst_qqmldebugjs
tst_qqmldebuglocal
tst_qqmldebugservice
tst_qqmlecmascript
tst_qqmlenginecleanup
...

45959685

202

}

203

204

template <typename ObjectType>

205

typename ObjectType::Data *allocateObject()

206

{

207

Scope scope(engine);

208

Scoped<InternalClass> ic(scope, ObjectType::defaultInternalClass(engine));

209

ic = ic->changeVTable(ObjectType::staticVTable());

210

ic = ic->changePrototype(ObjectType::defaultPrototype(engine)->d());

211

return allocateObject<ObjectType>(ic);

executed 45918127 times by 154 tests: return allocateObject<ObjectType>(ic);

Executed by:

tst_bindingdependencyapi
tst_drawingmodes
tst_ecmascripttests
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qjsonbinding
tst_qjsvalue
tst_qjsvalueiterator
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugclient
tst_qqmldebugjs
tst_qqmldebuglocal
tst_qqmldebugservice
tst_qqmlecmascript
tst_qqmlenginecleanup
...

45918127

212

}

213

214

template <typename ManagedType, typename Arg1>

215

typename ManagedType::Data *allocWithStringData(std::size_t unmanagedSize, Arg1 arg1)

216

{

217

typename ManagedType::Data *o = reinterpret_cast<typename ManagedType::Data *>(allocString(unmanagedSize));

218

o->internalClass.set(engine, ManagedType::defaultInternalClass(engine));

219

Q_ASSERT(o->internalClass && o->internalClass->vtable);

220

o->init(arg1);

221

return o;

executed 136169219 times by 154 tests: return o;

Executed by:

tst_bindingdependencyapi
tst_drawingmodes
tst_ecmascripttests
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qjsonbinding
tst_qjsvalue
tst_qjsvalueiterator
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugclient
tst_qqmldebugjs
tst_qqmldebuglocal
tst_qqmldebugservice
tst_qqmlecmascript
tst_qqmlenginecleanup
...

136169219

222

}

223

224

template <typename ObjectType, typename... Args>

225

typename ObjectType::Data *allocObject(Heap::InternalClass *ic, Args... args)

226

{

227

typename ObjectType::Data *d = allocateObject<ObjectType>(ic);

228

d->init(args...);

229

return d;

executed 7987204 times by 154 tests: return d;

Executed by:

tst_bindingdependencyapi
tst_drawingmodes
tst_ecmascripttests
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qjsonbinding
tst_qjsvalue
tst_qjsvalueiterator
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugclient
tst_qqmldebugjs
tst_qqmldebuglocal
tst_qqmldebugservice
tst_qqmlecmascript
tst_qqmlenginecleanup
...

7987204

230

}

231

232

template <typename ObjectType, typename... Args>

233

typename ObjectType::Data *allocObject(InternalClass *ic, Args... args)

234

{

235

typename ObjectType::Data *d = allocateObject<ObjectType>(ic);

236

d->init(args...);

237

return d;

executed 14647 times by 3 tests: return d;

Executed by:

tst_ecmascripttests
tst_qjsvalue
tst_qqmlecmascript

14647

238

}

239

240

template <typename ObjectType, typename... Args>

241

typename ObjectType::Data *allocate(Args... args)

242

{

243

Scope scope(engine);

244

Scoped<ObjectType> t(scope, allocateObject<ObjectType>());

245

t->d_unchecked()->init(args...);

246

return t->d();

executed 45977232 times by 154 tests: return t->d();

Executed by:

tst_bindingdependencyapi
tst_drawingmodes
tst_ecmascripttests
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qjsonbinding
tst_qjsvalue
tst_qjsvalueiterator
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugclient
tst_qqmldebugjs
tst_qqmldebuglocal
tst_qqmldebugservice
tst_qqmlecmascript
tst_qqmlenginecleanup
...

45977232

247

}

248

249

template <typename ManagedType, typename... Args>

250

typename ManagedType::Data *alloc(Args... args)

251

{

252

Scope scope(engine);

253

Scoped<ManagedType> t(scope, allocManaged<ManagedType>(sizeof(typename ManagedType::Data)));

254

t->d_unchecked()->init(args...);

255

return t->d();

executed 60779258 times by 154 tests: return t->d();

Executed by:

tst_bindingdependencyapi
tst_drawingmodes
tst_ecmascripttests
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qjsonbinding
tst_qjsvalue
tst_qjsvalueiterator
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugclient
tst_qqmldebugjs
tst_qqmldebuglocal
tst_qqmldebugservice
tst_qqmlecmascript
tst_qqmlenginecleanup
...

60779258

}

void runGC();

void dumpStats() const;

261

262

size_t getUsedMem() const;

263

size_t getAllocatedMem() const;

264

size_t getLargeItemsMem() const;

265

266

// called when a JS object grows itself. Specifically: Heap::String::append

267

void changeUnmanagedHeapSizeUsage(qptrdiff delta) { unmanagedHeapSize += delta; }

executed 170433955 times by 154 tests: end of block

Executed by:

tst_bindingdependencyapi
tst_drawingmodes
tst_ecmascripttests
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qjsonbinding
tst_qjsvalue
tst_qjsvalueiterator
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugclient
tst_qqmldebugjs
tst_qqmldebuglocal
tst_qqmldebugservice
tst_qqmlecmascript
tst_qqmlenginecleanup
...

170433955

268

269

template<typename ManagedType>

270

typename ManagedType::Data *allocIC()

271

{

272

size_t size = align(sizeof(typename ManagedType::Data));

273

Heap::Base *b = *icAllocator.allocate(size, true);

274

return static_cast<typename ManagedType::Data *>(b);

executed 72406692 times by 154 tests: return static_cast<typename ManagedType::Data *>(b);

Executed by:

tst_bindingdependencyapi
tst_drawingmodes
tst_ecmascripttests
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qjsonbinding
tst_qjsvalue
tst_qjsvalueiterator
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugclient
tst_qqmldebugjs
tst_qqmldebuglocal
tst_qqmldebugservice
tst_qqmlecmascript
tst_qqmlenginecleanup
...

72406692

}

protected:

/// expects size to be aligned

279

Heap::Base *allocString(std::size_t unmanagedSize);

280

Heap::Base *allocData(std::size_t size);

281

Heap::Object *allocObjectWithMemberData(const QV4::VTable *vtable, uint nMembers);

282

283

private:

284

void collectFromJSStack(MarkStack *markStack) const;

285

void mark();

286

void sweep(bool lastSweep = false, ClassDestroyStatsCallback classCountPtr = nullptr);

287

bool shouldRunGC() const;

288

void collectRoots(MarkStack *markStack);

289

290

public:

291

QV4::ExecutionEngine *engine;

292

ChunkAllocator *chunkAllocator;

293

BlockAllocator blockAllocator;

294

BlockAllocator icAllocator;

295

HugeItemAllocator hugeItemAllocator;

296

PersistentValueStorage *m_persistentValues;

297

PersistentValueStorage *m_weakValues;

298

QVector<Value *> m_pendingFreedObjectWrapperValue;

299

300

std::size_t unmanagedHeapSize = 0; // the amount of bytes of heap that is not managed by the memory manager, but which is held onto by managed items.

301

std::size_t unmanagedHeapSizeGCLimit;

302

std::size_t usedSlotsAfterLastFullSweep = 0;

303

304

bool gcBlocked = false;

305

bool aggressiveGC = false;

306

bool gcStats = false;

307

bool gcCollectorStats = false;

308

309

int allocationCount = 0;

310

size_t lastAllocRequestedSlots = 0;

311

312

struct {

313

size_t maxReservedMem = 0;

314

size_t maxAllocatedMem = 0;

315

size_t maxUsedMem = 0;

316

uint allocations[BlockAllocator::NumBins];

} statistics;

};

}

QT_END_NAMESPACE

#endif // QV4GC_H

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