WebKit/Source/JavaScriptCore/llint/LLIntData.h at main · WebKit/WebKit · GitHub

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* 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 "GPRInfo.h"

#include "Instruction.h"

#include "MacroAssemblerCodeRef.h"

#include "Opcode.h"

#if defined(__has_include)

#if __has_include(<os/script_config_private.h>)

#include <os/script_config_private.h>

#endif // __has_include(<libproc.h>)

#endif // defined(__has_include)

WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN

namespace JSC {

class VM;

#if ENABLE(C_LOOP)

typedef OpcodeID LLIntCode;

#else

typedef void (SYSV_ABI *LLIntCode)();

#endif

namespace LLInt {

struct OpcodeConfig {

JSC::Opcode opcodeMap[numOpcodeIDs];

JSC::Opcode opcodeMapWide16[numOpcodeIDs];

JSC::Opcode opcodeMapWide32[numOpcodeIDs];

void* ipint_dispatch_base;

void* ipint_gc_dispatch_base;

void* ipint_conversion_dispatch_base;

void* ipint_simd_dispatch_base;

void* ipint_atomic_dispatch_base;

};

constexpr size_t OpcodeConfigSizeToProtect = std::max(CeilingOnPageSize, 16 * KB);

#if HAVE(OS_SCRIPT_CONFIG_SPI)

static_assert(OS_SCRIPT_CONFIG_STORAGE_SIZE == OpcodeConfigSizeToProtect);

#elif PLATFORM(COCOA)

// When targeting older versions of macOS that do not have

// os_script_config_storage runtime support, this redeclaration clashes with

// the declaration in the SDK that is marked as unavailable. Use a different

// name to work around the availability diagnostic.

extern "C" uint8_t os_script_config_storage_stub[] __asm__("_os_script_config_storage");

#define os_script_config_storage os_script_config_storage_stub

#else

extern "C" uint8_t os_script_config_storage[];

#endif

inline OpcodeConfig* addressOfOpcodeConfig() { return std::bit_cast<OpcodeConfig*>(&os_script_config_storage); }

#define g_opcodeConfig (*JSC::LLInt::addressOfOpcodeConfig())

#define g_opcodeMap g_opcodeConfig.opcodeMap

#define g_opcodeMapWide16 g_opcodeConfig.opcodeMapWide16

#define g_opcodeMapWide32 g_opcodeConfig.opcodeMapWide32

class Data {

friend void initialize();

friend JSInstruction* exceptionInstructions();

friend JSC::Opcode* opcodeMap();

friend JSC::Opcode* opcodeMapWide16();

friend JSC::Opcode* opcodeMapWide32();

friend JSC::Opcode getOpcode(OpcodeID);

friend JSC::Opcode getOpcodeWide16(OpcodeID);

friend JSC::Opcode getOpcodeWide32(OpcodeID);

template<PtrTag tag> friend CodePtr<tag> getCodePtr(OpcodeID);

template<PtrTag tag> friend CodePtr<tag> getWide16CodePtr(OpcodeID);

template<PtrTag tag> friend CodePtr<tag> getWide32CodePtr(OpcodeID);

template<PtrTag tag> friend MacroAssemblerCodeRef<tag> getCodeRef(OpcodeID);

};

void initialize();

inline JSInstruction* exceptionInstructions()

{

return reinterpret_cast<JSInstruction*>(g_jscConfig.llint.exceptionInstructions);

}

inline JSC::Opcode* opcodeMap()

{

return g_opcodeMap;

}

inline JSC::Opcode* opcodeMapWide16()

{

return g_opcodeMapWide16;

}

inline JSC::Opcode* opcodeMapWide32()

{

return g_opcodeMapWide32;

}

inline JSC::Opcode getOpcode(OpcodeID id)

{

#if ENABLE(COMPUTED_GOTO_OPCODES)

return g_opcodeMap[id];

#else

return static_cast<Opcode>(id);

#endif

}

inline JSC::Opcode getOpcodeWide16(OpcodeID id)

{

#if ENABLE(COMPUTED_GOTO_OPCODES)

return g_opcodeMapWide16[id];

#else

UNUSED_PARAM(id);

RELEASE_ASSERT_NOT_REACHED();

#endif

}

inline JSC::Opcode getOpcodeWide32(OpcodeID id)

{

#if ENABLE(COMPUTED_GOTO_OPCODES)

return g_opcodeMapWide32[id];

#else

UNUSED_PARAM(id);

RELEASE_ASSERT_NOT_REACHED();

#endif

}

template<PtrTag tag>

ALWAYS_INLINE CodePtr<tag> getCodePtrImpl(const JSC::Opcode opcode)

{

void* taggedOpcode = tagCodePtr<tag>(reinterpret_cast<void*>(opcode));

return CodePtr<tag>::fromTaggedPtr(taggedOpcode);

}

#if ENABLE(ARM64E) && !ENABLE(COMPUTED_GOTO_OPCODES)

#error ENABLE(ARM64E) requires ENABLE(COMPUTED_GOTO_OPCODES) for getCodePtr (and its variants).

#endif

template<PtrTag tag>

ALWAYS_INLINE CodePtr<tag> getCodePtr(OpcodeID opcodeID)

{

return getCodePtrImpl<tag>(getOpcode(opcodeID));

}

template<PtrTag tag>

ALWAYS_INLINE CodePtr<tag> getWide16CodePtr(OpcodeID opcodeID)

{

return getCodePtrImpl<tag>(getOpcodeWide16(opcodeID));

}

template<PtrTag tag>

ALWAYS_INLINE CodePtr<tag> getWide32CodePtr(OpcodeID opcodeID)

{

return getCodePtrImpl<tag>(getOpcodeWide32(opcodeID));

}

template<PtrTag tag>

ALWAYS_INLINE MacroAssemblerCodeRef<tag> getCodeRef(OpcodeID opcodeID)

{

return MacroAssemblerCodeRef<tag>::createSelfManagedCodeRef(getCodePtr<tag>(opcodeID));

}

template<PtrTag tag>

ALWAYS_INLINE MacroAssemblerCodeRef<tag> getWide16CodeRef(OpcodeID opcodeID)

{

return MacroAssemblerCodeRef<tag>::createSelfManagedCodeRef(getWide16CodePtr<tag>(opcodeID));

}

template<PtrTag tag>

ALWAYS_INLINE MacroAssemblerCodeRef<tag> getWide32CodeRef(OpcodeID opcodeID)

{

return MacroAssemblerCodeRef<tag>::createSelfManagedCodeRef(getWide32CodePtr<tag>(opcodeID));

}

template<PtrTag tag>

ALWAYS_INLINE LLIntCode getCodeFunctionPtr(OpcodeID opcodeID)

{

return reinterpret_cast<LLIntCode>(getCodePtr<tag>(opcodeID).template taggedPtr<>());

}

#if ENABLE(JIT)

template<PtrTag tag>

ALWAYS_INLINE LLIntCode getWide16CodeFunctionPtr(OpcodeID opcodeID)

{

return reinterpret_cast<LLIntCode>(getWide16CodePtr<tag>(opcodeID).template taggedPtr<>());

}

template<PtrTag tag>

ALWAYS_INLINE LLIntCode getWide32CodeFunctionPtr(OpcodeID opcodeID)

{

return reinterpret_cast<LLIntCode>(getWide32CodePtr<tag>(opcodeID).template taggedPtr<>());

}

#else // not ENABLE(JIT)

ALWAYS_INLINE void* getCodePtr(OpcodeID id)

{

return reinterpret_cast<void*>(getOpcode(id));

}

ALWAYS_INLINE void* getWide16CodePtr(OpcodeID id)

{

return reinterpret_cast<void*>(getOpcodeWide16(id));

}

ALWAYS_INLINE void* getWide32CodePtr(OpcodeID id)

{

return reinterpret_cast<void*>(getOpcodeWide32(id));

}

#endif // ENABLE(JIT)

#if ENABLE(JIT)

struct Registers {

static constexpr GPRReg pcGPR = GPRInfo::regT4;

static constexpr GPRReg pbGPR = GPRInfo::jitDataRegister;

static constexpr GPRReg metadataTableGPR = GPRInfo::metadataTableRegister;

};

#endif

} } // namespace JSC::LLInt

WTF_ALLOW_UNSAFE_BUFFER_USAGE_END

WebKit/Source/JavaScriptCore/llint/LLIntData.h at main · WebKit/WebKit · GitHub

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