#ifndef JITCode_h
#define JITCode_h
#if ENABLE(JIT)
#include "CallFrame.h"
#include "JSValue.h"
#include "MacroAssemblerCodeRef.h"
#include "Profiler.h"
#endif
namespace JSC {
#if ENABLE(JIT)
class JSGlobalData;
class RegisterFile;
#endif
class JITCode {
#if ENABLE(JIT)
typedef MacroAssemblerCodeRef CodeRef;
typedef MacroAssemblerCodePtr CodePtr;
#else
JITCode() { }
#endif
public:
enum JITType { None, HostCallThunk, InterpreterThunk, BaselineJIT, DFGJIT };
static JITType bottomTierJIT()
{
return BaselineJIT;
}
static JITType topTierJIT()
{
return DFGJIT;
}
static JITType nextTierJIT(JITType jitType)
{
ASSERT_UNUSED(jitType, jitType == BaselineJIT || jitType == DFGJIT);
return DFGJIT;
}
static bool isOptimizingJIT(JITType jitType)
{
return jitType == DFGJIT;
}
static bool isBaselineCode(JITType jitType)
{
return jitType == InterpreterThunk || jitType == BaselineJIT;
}
#if ENABLE(JIT)
JITCode()
: m_jitType(None)
{
}
JITCode(const CodeRef ref, JITType jitType)
: m_ref(ref)
, m_jitType(jitType)
{
ASSERT(jitType != None);
}
bool operator !() const
{
return !m_ref;
}
CodePtr addressForCall()
{
return m_ref.code();
}
void* executableAddressAtOffset(size_t offset) const
{
ASSERT(offset < size());
return reinterpret_cast<char*>(m_ref.code().executableAddress()) + offset;
}
void* dataAddressAtOffset(size_t offset) const
{
ASSERT(offset < size());
return reinterpret_cast<char*>(m_ref.code().dataLocation()) + offset;
}
unsigned offsetOf(void* pointerIntoCode)
{
intptr_t result = reinterpret_cast<intptr_t>(pointerIntoCode) - reinterpret_cast<intptr_t>(m_ref.code().executableAddress());
ASSERT(static_cast<intptr_t>(static_cast<unsigned>(result)) == result);
return static_cast<unsigned>(result);
}
inline JSValue execute(RegisterFile* registerFile, CallFrame* callFrame, JSGlobalData* globalData)
{
JSValue result = JSValue::decode(ctiTrampoline(m_ref.code().executableAddress(), registerFile, callFrame, 0, Profiler::enabledProfilerReference(), globalData));
return globalData->exception ? jsNull() : result;
}
void* start() const
{
return m_ref.code().dataLocation();
}
size_t size() const
{
ASSERT(m_ref.code().executableAddress());
return m_ref.size();
}
ExecutableMemoryHandle* getExecutableMemory()
{
return m_ref.executableMemory();
}
JITType jitType()
{
return m_jitType;
}
static JITCode HostFunction(CodeRef code)
{
return JITCode(code, HostCallThunk);
}
void clear()
{
m_ref.~CodeRef();
new (NotNull, &m_ref) CodeRef();
}
private:
JITCode(PassRefPtr<ExecutableMemoryHandle> executableMemory, JITType jitType)
: m_ref(executableMemory)
, m_jitType(jitType)
{
}
CodeRef m_ref;
JITType m_jitType;
#endif // ENABLE(JIT)
};
};
#endif