mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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69 lines
2.5 KiB
C++
69 lines
2.5 KiB
C++
/*
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* Copyright (C) 2016-2018 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "JSCPtrTag.h"
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namespace JSC {
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namespace LLInt {
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// These are used just to denote where LLInt code begins and where it ends.
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extern "C" {
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void llintPCRangeStart();
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void llintPCRangeEnd();
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#if ENABLE(WEBASSEMBLY)
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void wasmLLIntPCRangeStart();
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void wasmLLIntPCRangeEnd();
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#endif
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}
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ALWAYS_INLINE bool isLLIntPC(void* pc)
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{
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uintptr_t pcAsInt = bitwise_cast<uintptr_t>(pc);
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uintptr_t llintStart = untagCodePtr<uintptr_t, CFunctionPtrTag>(llintPCRangeStart);
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uintptr_t llintEnd = untagCodePtr<uintptr_t, CFunctionPtrTag>(llintPCRangeEnd);
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RELEASE_ASSERT(llintStart < llintEnd);
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return llintStart <= pcAsInt && pcAsInt <= llintEnd;
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}
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#if ENABLE(WEBASSEMBLY)
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ALWAYS_INLINE bool isWasmLLIntPC(void* pc)
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{
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uintptr_t pcAsInt = bitwise_cast<uintptr_t>(pc);
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uintptr_t start = untagCodePtr<uintptr_t, CFunctionPtrTag>(wasmLLIntPCRangeStart);
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uintptr_t end = untagCodePtr<uintptr_t, CFunctionPtrTag>(wasmLLIntPCRangeEnd);
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RELEASE_ASSERT(start < end);
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return start <= pcAsInt && pcAsInt <= end;
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}
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#endif
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#if !ENABLE(C_LOOP)
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static constexpr GPRReg LLIntPC = GPRInfo::regT4;
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#endif
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} } // namespace JSC::LLInt
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