mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2025-04-10 19:01:07 +00:00
108 lines
4.1 KiB
C++
108 lines
4.1 KiB
C++
/*
|
|
* Copyright (C) 2016 Yusuke Suzuki <utatane.tea@gmail.com>
|
|
* Copyright (C) 2016-2020 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 "CallFrameClosure.h"
|
|
#include "Exception.h"
|
|
#include "FunctionCodeBlock.h"
|
|
#include "FunctionExecutable.h"
|
|
#include "Instruction.h"
|
|
#include "Interpreter.h"
|
|
#include "JSCPtrTag.h"
|
|
#include "LLIntData.h"
|
|
#include "ProtoCallFrameInlines.h"
|
|
#include "UnlinkedCodeBlock.h"
|
|
#include <wtf/UnalignedAccess.h>
|
|
|
|
namespace JSC {
|
|
|
|
inline Opcode Interpreter::getOpcode(OpcodeID id)
|
|
{
|
|
return LLInt::getOpcode(id);
|
|
}
|
|
|
|
// This function is only available as a debugging tool for development work.
|
|
// It is not currently used except in a RELEASE_ASSERT to ensure that it is
|
|
// working properly.
|
|
inline OpcodeID Interpreter::getOpcodeID(Opcode opcode)
|
|
{
|
|
#if ENABLE(COMPUTED_GOTO_OPCODES)
|
|
ASSERT(isOpcode(opcode));
|
|
#if ENABLE(LLINT_EMBEDDED_OPCODE_ID)
|
|
// The OpcodeID is embedded in the int32_t word preceding the location of
|
|
// the LLInt code for the opcode (see the EMBED_OPCODE_ID_IF_NEEDED macro
|
|
// in LowLevelInterpreter.cpp).
|
|
const void* opcodeAddress = removeCodePtrTag(bitwise_cast<const void*>(opcode));
|
|
const int32_t* opcodeIDAddress = bitwise_cast<int32_t*>(opcodeAddress) - 1;
|
|
OpcodeID opcodeID = static_cast<OpcodeID>(WTF::unalignedLoad<int32_t>(opcodeIDAddress));
|
|
ASSERT(opcodeID < NUMBER_OF_BYTECODE_IDS);
|
|
return opcodeID;
|
|
#else
|
|
return opcodeIDTable().get(opcode);
|
|
#endif // ENABLE(LLINT_EMBEDDED_OPCODE_ID)
|
|
|
|
#else // not ENABLE(COMPUTED_GOTO_OPCODES)
|
|
return opcode;
|
|
#endif
|
|
}
|
|
|
|
ALWAYS_INLINE JSValue Interpreter::execute(CallFrameClosure& closure)
|
|
{
|
|
VM& vm = *closure.vm;
|
|
auto throwScope = DECLARE_THROW_SCOPE(vm);
|
|
|
|
ASSERT(!vm.isCollectorBusyOnCurrentThread());
|
|
ASSERT(vm.currentThreadIsHoldingAPILock());
|
|
|
|
StackStats::CheckPoint stackCheckPoint;
|
|
|
|
constexpr auto trapsMask = VMTraps::interruptingTraps();
|
|
if (UNLIKELY(vm.needTrapHandling(trapsMask))) {
|
|
vm.handleTraps(closure.protoCallFrame->globalObject, closure.oldCallFrame, trapsMask);
|
|
RETURN_IF_EXCEPTION(throwScope, throwScope.exception());
|
|
}
|
|
|
|
// Reload CodeBlock since GC can replace CodeBlock owned by Executable.
|
|
CodeBlock* codeBlock;
|
|
Exception* error = closure.functionExecutable->prepareForExecution<FunctionExecutable>(vm, closure.function, closure.scope, CodeForCall, codeBlock);
|
|
EXCEPTION_ASSERT(throwScope.exception() == error);
|
|
if (UNLIKELY(error))
|
|
return checkedReturn(error);
|
|
codeBlock->m_shouldAlwaysBeInlined = false;
|
|
{
|
|
DisallowGC disallowGC; // Ensure no GC happens. GC can replace CodeBlock in Executable.
|
|
closure.protoCallFrame->setCodeBlock(codeBlock);
|
|
}
|
|
// Execute the code:
|
|
throwScope.release();
|
|
JSValue result = closure.functionExecutable->generatedJITCodeForCall()->execute(&vm, closure.protoCallFrame);
|
|
|
|
return checkedReturn(result);
|
|
}
|
|
|
|
} // namespace JSC
|