1/*
2 * Copyright (C) 2017-2018 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#pragma once
27
28#if ENABLE(WEBASSEMBLY)
29
30#include "MacroAssemblerCodeRef.h"
31#include "WasmEmbedder.h"
32
33namespace JSC { namespace Wasm {
34
35MacroAssemblerCodeRef<JITThunkPtrTag> throwExceptionFromWasmThunkGenerator(const AbstractLocker&);
36MacroAssemblerCodeRef<JITThunkPtrTag> throwStackOverflowFromWasmThunkGenerator(const AbstractLocker&);
37MacroAssemblerCodeRef<JITThunkPtrTag> triggerOMGEntryTierUpThunkGenerator(const AbstractLocker&);
38
39typedef MacroAssemblerCodeRef<JITThunkPtrTag> (*ThunkGenerator)(const AbstractLocker&);
40
41class Thunks {
42 WTF_MAKE_FAST_ALLOCATED;
43 WTF_MAKE_NONCOPYABLE(Thunks);
44public:
45 static void initialize();
46 static Thunks& singleton();
47
48 void setThrowWasmException(ThrowWasmException);
49 ThrowWasmException throwWasmException();
50
51 MacroAssemblerCodeRef<JITThunkPtrTag> stub(ThunkGenerator);
52 MacroAssemblerCodeRef<JITThunkPtrTag> stub(const AbstractLocker&, ThunkGenerator);
53 MacroAssemblerCodeRef<JITThunkPtrTag> existingStub(ThunkGenerator);
54
55private:
56 Thunks() = default;
57
58 HashMap<ThunkGenerator, MacroAssemblerCodeRef<JITThunkPtrTag>> m_stubs;
59 ThrowWasmException m_throwWasmException { nullptr };
60 Lock m_lock;
61};
62
63} } // namespace JSC::Wasm
64
65#endif // ENABLE(WEBASSEMBLY)
66