/*
- * Copyright (C) 2008 Apple Inc. All rights reserved.
+ * Copyright (C) 2008, 2012, 2013 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
#ifndef JITCode_h
#define JITCode_h
-#if ENABLE(JIT)
-
+#include "ArityCheckMode.h"
#include "CallFrame.h"
-#include "JSValue.h"
+#include "Disassembler.h"
+#include "JITStubs.h"
+#include "JSCJSValue.h"
+#include "LegacyProfiler.h"
#include "MacroAssemblerCodeRef.h"
-#include "Profiler.h"
+#include "RegisterPreservationMode.h"
namespace JSC {
- class JSGlobalData;
- class RegisterFile;
+namespace DFG {
+class CommonData;
+class JITCode;
+}
+namespace FTL {
+class ForOSREntryJITCode;
+class JITCode;
+}
- class JITCode {
- typedef MacroAssemblerCodeRef CodeRef;
- typedef MacroAssemblerCodePtr CodePtr;
- public:
- JITCode()
- {
- }
+struct ProtoCallFrame;
+class VM;
- JITCode(const CodeRef ref)
- : m_ref(ref)
- {
- }
+class JITCode : public ThreadSafeRefCounted<JITCode> {
+public:
+ typedef MacroAssemblerCodeRef CodeRef;
+ typedef MacroAssemblerCodePtr CodePtr;
- bool operator !() const
- {
- return !m_ref.m_code.executableAddress();
+ enum JITType : uint8_t {
+ None,
+ HostCallThunk,
+ InterpreterThunk,
+ BaselineJIT,
+ DFGJIT,
+ FTLJIT
+ };
+
+ static JITType bottomTierJIT()
+ {
+ return BaselineJIT;
+ }
+
+ static JITType topTierJIT()
+ {
+ return FTLJIT;
+ }
+
+ static JITType nextTierJIT(JITType jitType)
+ {
+ switch (jitType) {
+ case BaselineJIT:
+ return DFGJIT;
+ case DFGJIT:
+ return FTLJIT;
+ default:
+ RELEASE_ASSERT_NOT_REACHED();
+ return None;
}
-
- CodePtr addressForCall()
- {
- return m_ref.m_code;
+ }
+
+ static bool isExecutableScript(JITType jitType)
+ {
+ switch (jitType) {
+ case None:
+ case HostCallThunk:
+ return false;
+ default:
+ return true;
}
-
- // This function returns the offset in bytes of 'pointerIntoCode' into
- // this block of code. The pointer provided must be a pointer into this
- // block of code. It is ASSERTed that no codeblock >4gb in size.
- unsigned offsetOf(void* pointerIntoCode)
- {
- intptr_t result = reinterpret_cast<intptr_t>(pointerIntoCode) - reinterpret_cast<intptr_t>(m_ref.m_code.executableAddress());
- ASSERT(static_cast<intptr_t>(static_cast<unsigned>(result)) == result);
- return static_cast<unsigned>(result);
+ }
+
+ static bool couldBeInterpreted(JITType jitType)
+ {
+ switch (jitType) {
+ case InterpreterThunk:
+ case BaselineJIT:
+ return true;
+ default:
+ return false;
}
-
- // Execute the code!
- inline JSValue execute(RegisterFile* registerFile, CallFrame* callFrame, JSGlobalData* globalData)
- {
- JSValue result = JSValue::decode(ctiTrampoline(m_ref.m_code.executableAddress(), registerFile, callFrame, 0, Profiler::enabledProfilerReference(), globalData));
- return globalData->exception ? jsNull() : result;
+ }
+
+ static bool isJIT(JITType jitType)
+ {
+ switch (jitType) {
+ case BaselineJIT:
+ case DFGJIT:
+ case FTLJIT:
+ return true;
+ default:
+ return false;
}
+ }
+
+ static bool isLowerTier(JITType expectedLower, JITType expectedHigher)
+ {
+ RELEASE_ASSERT(isExecutableScript(expectedLower));
+ RELEASE_ASSERT(isExecutableScript(expectedHigher));
+ return expectedLower < expectedHigher;
+ }
+
+ static bool isHigherTier(JITType expectedHigher, JITType expectedLower)
+ {
+ return isLowerTier(expectedLower, expectedHigher);
+ }
+
+ static bool isLowerOrSameTier(JITType expectedLower, JITType expectedHigher)
+ {
+ return !isHigherTier(expectedLower, expectedHigher);
+ }
+
+ static bool isHigherOrSameTier(JITType expectedHigher, JITType expectedLower)
+ {
+ return isLowerOrSameTier(expectedLower, expectedHigher);
+ }
+
+ static bool isOptimizingJIT(JITType jitType)
+ {
+ return jitType == DFGJIT || jitType == FTLJIT;
+ }
+
+ static bool isBaselineCode(JITType jitType)
+ {
+ return jitType == InterpreterThunk || jitType == BaselineJIT;
+ }
+
+protected:
+ JITCode(JITType);
+
+public:
+ virtual ~JITCode();
+
+ JITType jitType() const
+ {
+ return m_jitType;
+ }
+
+ template<typename PointerType>
+ static JITType jitTypeFor(PointerType jitCode)
+ {
+ if (!jitCode)
+ return None;
+ return jitCode->jitType();
+ }
+
+ virtual CodePtr addressForCall(VM&, ExecutableBase*, ArityCheckMode, RegisterPreservationMode) = 0;
+ virtual void* executableAddressAtOffset(size_t offset) = 0;
+ void* executableAddress() { return executableAddressAtOffset(0); }
+ virtual void* dataAddressAtOffset(size_t offset) = 0;
+ virtual unsigned offsetOf(void* pointerIntoCode) = 0;
+
+ virtual DFG::CommonData* dfgCommon();
+ virtual DFG::JITCode* dfg();
+ virtual FTL::JITCode* ftl();
+ virtual FTL::ForOSREntryJITCode* ftlForOSREntry();
+
+ JSValue execute(VM*, ProtoCallFrame*);
+
+ void* start() { return dataAddressAtOffset(0); }
+ virtual size_t size() = 0;
+ void* end() { return reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(start()) + size()); }
+
+ virtual bool contains(void*) = 0;
- void* start()
- {
- return m_ref.m_code.dataLocation();
- }
+private:
+ JITType m_jitType;
+};
- size_t size()
- {
- ASSERT(m_ref.m_code.executableAddress());
- return m_ref.m_size;
- }
+class JITCodeWithCodeRef : public JITCode {
+protected:
+ JITCodeWithCodeRef(JITType);
+ JITCodeWithCodeRef(CodeRef, JITType);
- ExecutablePool* getExecutablePool()
- {
- return m_ref.m_executablePool.get();
- }
+public:
+ virtual ~JITCodeWithCodeRef();
- // Host functions are a bit special; they have a m_code pointer but they
- // do not individully ref the executable pool containing the trampoline.
- static JITCode HostFunction(CodePtr code)
- {
- return JITCode(code.dataLocation(), 0, 0);
- }
+ virtual void* executableAddressAtOffset(size_t offset) override;
+ virtual void* dataAddressAtOffset(size_t offset) override;
+ virtual unsigned offsetOf(void* pointerIntoCode) override;
+ virtual size_t size() override;
+ virtual bool contains(void*) override;
- void clear()
- {
- m_ref.~CodeRef();
- new (&m_ref) CodeRef();
- }
+protected:
+ CodeRef m_ref;
+};
- private:
- JITCode(void* code, PassRefPtr<ExecutablePool> executablePool, size_t size)
- : m_ref(code, executablePool, size)
- {
- }
+class DirectJITCode : public JITCodeWithCodeRef {
+public:
+ DirectJITCode(JITType);
+ DirectJITCode(CodeRef, CodePtr withArityCheck, JITType);
+ virtual ~DirectJITCode();
+
+ void initializeCodeRef(CodeRef, CodePtr withArityCheck);
- CodeRef m_ref;
+ virtual CodePtr addressForCall(VM&, ExecutableBase*, ArityCheckMode, RegisterPreservationMode) override;
+
+private:
+ struct RegisterPreservationWrappers {
+ CodeRef withoutArityCheck;
+ CodeRef withArityCheck;
};
+ RegisterPreservationWrappers* ensureWrappers();
+
+ CodePtr m_withArityCheck;
+
+ std::unique_ptr<RegisterPreservationWrappers> m_wrappers;
};
-#endif
+class NativeJITCode : public JITCodeWithCodeRef {
+public:
+ NativeJITCode(JITType);
+ NativeJITCode(CodeRef, JITType);
+ virtual ~NativeJITCode();
+
+ void initializeCodeRef(CodeRef);
+
+ virtual CodePtr addressForCall(VM&, ExecutableBase*, ArityCheckMode, RegisterPreservationMode) override;
+};
+
+} // namespace JSC
+
+namespace WTF {
+
+class PrintStream;
+void printInternal(PrintStream&, JSC::JITCode::JITType);
+
+} // namespace WTF
#endif
projects / apple / javascriptcore.git / blobdiff