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	1	/*
	2	* Copyright (C) 2012, 2013 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. ``AS IS'' AND ANY
	14	* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	15	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	16	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
	17	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	18	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	19	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	20	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
	21	* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	23	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	24	*/
	25
	26	#ifndef JITThunks_h
	27	#define JITThunks_h
	28
	29	#if ENABLE(JIT)
	30
	31	#include "CallData.h"
	32	#include "Intrinsic.h"
	33	#include "LowLevelInterpreter.h"
	34	#include "MacroAssemblerCodeRef.h"
	35	#include "ThunkGenerator.h"
	36	#include "Weak.h"
	37	#include "WeakInlines.h"
	38	#include <wtf/HashMap.h>
	39	#include <wtf/OwnPtr.h>
	40	#include <wtf/RefPtr.h>
	41	#include <wtf/ThreadingPrimitives.h>
	42
	43	namespace JSC {
	44
	45	class VM;
	46	class NativeExecutable;
	47
	48	class JITThunks {
	49	public:
	50	JITThunks();
	51	~JITThunks();
	52
	53	MacroAssemblerCodePtr ctiNativeCall(VM*);
	54	MacroAssemblerCodePtr ctiNativeConstruct(VM*);
	55	MacroAssemblerCodePtr ctiNativeTailCall(VM*);
	56
	57	MacroAssemblerCodeRef ctiStub(VM*, ThunkGenerator);
	58
	59	NativeExecutable* hostFunctionStub(VM*, NativeFunction, NativeFunction constructor);
	60	NativeExecutable* hostFunctionStub(VM*, NativeFunction, ThunkGenerator, Intrinsic);
	61
	62	void clearHostFunctionStubs();
	63
	64	private:
	65	// Main thread can hold this lock for a while, so use an adaptive mutex.
	66	typedef Mutex Lock;
	67	typedef MutexLocker Locker;
	68
	69	typedef HashMap<ThunkGenerator, MacroAssemblerCodeRef> CTIStubMap;
	70	CTIStubMap m_ctiStubMap;
	71	typedef HashMap<std::pair<NativeFunction, NativeFunction>, Weak<NativeExecutable>> HostFunctionStubMap;
	72	OwnPtr<HostFunctionStubMap> m_hostFunctionStubMap;
	73	Lock m_lock;
	74	};
	75
	76	} // namespace JSC
	77
	78	#endif // ENABLE(JIT)
	79
	80	#endif // JITThunks_h
	81