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
43namespace JSC {
44
45class VM;
46class NativeExecutable;
47
48class JITThunks {
49public:
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
64private:
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
82