1/*
2 * Copyright (C) 2012 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#include "config.h"
27#include "JITThunks.h"
28
29#if ENABLE(JIT)
30
31#include "Executable.h"
32#include "JIT.h"
33#include "VM.h"
34#include "Operations.h"
35
36namespace JSC {
37
38JITThunks::JITThunks()
39    : m_hostFunctionStubMap(adoptPtr(new HostFunctionStubMap))
40{
41}
42
43JITThunks::~JITThunks()
44{
45}
46
47MacroAssemblerCodePtr JITThunks::ctiNativeCall(VM* vm)
48{
49#if ENABLE(LLINT)
50    if (!vm->canUseJIT())
51        return MacroAssemblerCodePtr::createLLIntCodePtr(llint_native_call_trampoline);
52#endif
53    return ctiStub(vm, nativeCallGenerator).code();
54}
55MacroAssemblerCodePtr JITThunks::ctiNativeConstruct(VM* vm)
56{
57#if ENABLE(LLINT)
58    if (!vm->canUseJIT())
59        return MacroAssemblerCodePtr::createLLIntCodePtr(llint_native_construct_trampoline);
60#endif
61    return ctiStub(vm, nativeConstructGenerator).code();
62}
63
64MacroAssemblerCodeRef JITThunks::ctiStub(VM* vm, ThunkGenerator generator)
65{
66    CTIStubMap::AddResult entry = m_ctiStubMap.add(generator, MacroAssemblerCodeRef());
67    if (entry.isNewEntry)
68        entry.iterator->value = generator(vm);
69    return entry.iterator->value;
70}
71
72NativeExecutable* JITThunks::hostFunctionStub(VM* vm, NativeFunction function, NativeFunction constructor)
73{
74    if (NativeExecutable* nativeExecutable = m_hostFunctionStubMap->get(std::make_pair(function, constructor)))
75        return nativeExecutable;
76
77    NativeExecutable* nativeExecutable = NativeExecutable::create(*vm, JIT::compileCTINativeCall(vm, function), function, MacroAssemblerCodeRef::createSelfManagedCodeRef(ctiNativeConstruct(vm)), constructor, NoIntrinsic);
78    weakAdd(*m_hostFunctionStubMap, std::make_pair(function, constructor), PassWeak<NativeExecutable>(nativeExecutable));
79    return nativeExecutable;
80}
81
82NativeExecutable* JITThunks::hostFunctionStub(VM* vm, NativeFunction function, ThunkGenerator generator, Intrinsic intrinsic)
83{
84    if (NativeExecutable* nativeExecutable = m_hostFunctionStubMap->get(std::make_pair(function, &callHostFunctionAsConstructor)))
85        return nativeExecutable;
86
87    MacroAssemblerCodeRef code;
88    if (generator) {
89        if (vm->canUseJIT())
90            code = generator(vm);
91        else
92            code = MacroAssemblerCodeRef();
93    } else
94        code = JIT::compileCTINativeCall(vm, function);
95
96    NativeExecutable* nativeExecutable = NativeExecutable::create(*vm, code, function, MacroAssemblerCodeRef::createSelfManagedCodeRef(ctiNativeConstruct(vm)), callHostFunctionAsConstructor, intrinsic);
97    weakAdd(*m_hostFunctionStubMap, std::make_pair(function, &callHostFunctionAsConstructor), PassWeak<NativeExecutable>(nativeExecutable));
98    return nativeExecutable;
99}
100
101void JITThunks::clearHostFunctionStubs()
102{
103    m_hostFunctionStubMap.clear();
104}
105
106} // namespace JSC
107
108#endif // ENABLE(JIT)
109