InterpreterInlines.h [plain text]
#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);
}
inline OpcodeID Interpreter::getOpcodeID(Opcode opcode)
{
#if ENABLE(COMPUTED_GOTO_OPCODES)
ASSERT(isOpcode(opcode));
#if ENABLE(LLINT_EMBEDDED_OPCODE_ID)
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());
}
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; closure.protoCallFrame->setCodeBlock(codeBlock);
}
throwScope.release();
JSValue result = closure.functionExecutable->generatedJITCodeForCall()->execute(&vm, closure.protoCallFrame);
return checkedReturn(result);
}
}