mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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91 lines
3.2 KiB
C++
91 lines
3.2 KiB
C++
/*
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* Copyright (C) 2016 Yusuke Suzuki <utatane.tea@gmail.com>
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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 "CallFrameClosure.h"
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#include "Exception.h"
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#include "Instruction.h"
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#include "Interpreter.h"
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#include "JSCPtrTag.h"
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#include "LLIntData.h"
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#include "UnlinkedCodeBlock.h"
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#include <wtf/UnalignedAccess.h>
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namespace JSC {
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inline Opcode Interpreter::getOpcode(OpcodeID id)
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{
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return LLInt::getOpcode(id);
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}
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inline OpcodeID Interpreter::getOpcodeID(Opcode opcode)
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{
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#if ENABLE(COMPUTED_GOTO_OPCODES)
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ASSERT(isOpcode(opcode));
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#if USE(LLINT_EMBEDDED_OPCODE_ID)
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// The OpcodeID is embedded in the int32_t word preceding the location of
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// the LLInt code for the opcode (see the EMBED_OPCODE_ID_IF_NEEDED macro
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// in LowLevelInterpreter.cpp).
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auto codePtr = MacroAssemblerCodePtr<BytecodePtrTag>::createFromExecutableAddress(opcode);
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int32_t* opcodeIDAddress = codePtr.dataLocation<int32_t*>() - 1;
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OpcodeID opcodeID = static_cast<OpcodeID>(WTF::unalignedLoad<int32_t>(opcodeIDAddress));
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ASSERT(opcodeID < NUMBER_OF_BYTECODE_IDS);
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return opcodeID;
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#else
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return opcodeIDTable().get(opcode);
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#endif // USE(LLINT_EMBEDDED_OPCODE_ID)
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#else // not ENABLE(COMPUTED_GOTO_OPCODES)
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return opcode;
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#endif
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}
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ALWAYS_INLINE JSValue Interpreter::execute(CallFrameClosure& closure)
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{
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VM& vm = *closure.vm;
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auto throwScope = DECLARE_THROW_SCOPE(vm);
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ASSERT(!vm.isCollectorBusyOnCurrentThread());
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ASSERT(vm.currentThreadIsHoldingAPILock());
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StackStats::CheckPoint stackCheckPoint;
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VMTraps::Mask mask(VMTraps::NeedTermination, VMTraps::NeedWatchdogCheck);
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if (UNLIKELY(vm.needTrapHandling(mask))) {
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vm.handleTraps(closure.oldCallFrame, mask);
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RETURN_IF_EXCEPTION(throwScope, throwScope.exception());
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}
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// Execute the code:
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throwScope.release();
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JSValue result = closure.functionExecutable->generatedJITCodeForCall()->execute(&vm, closure.protoCallFrame);
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return checkedReturn(result);
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}
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} // namespace JSC
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