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