JavaScriptCore-1218.35.tar.gz

[apple/javascriptcore.git] / jit / JITCode.h

diff --git a/jit/JITCode.h b/jit/JITCode.h
index 69cf16728e22c6104c81057f96be053b6ef485fe..b7521fb21130cea5a1878c859d5cd8cabd840ebb 100644 (file)
--- a/jit/JITCode.h
+++ b/jit/JITCode.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2008 Apple Inc. All rights reserved.
+ * Copyright (C) 2008, 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -26,41 +26,96 @@
 #ifndef JITCode_h
 #define JITCode_h
 
-#include <wtf/Platform.h>
-
-#if ENABLE(JIT)
-
+#if ENABLE(JIT) || ENABLE(LLINT)
 #include "CallFrame.h"
-#include "JSValue.h"
+#include "Disassembler.h"
+#include "JITStubs.h"
+#include "JSCJSValue.h"
+#include "LegacyProfiler.h"
 #include "MacroAssemblerCodeRef.h"
-#include "Profiler.h"
+#endif
 
 namespace JSC {
 
-    class JSGlobalData;
-    class RegisterFile;
-
+#if ENABLE(JIT)
+    class VM;
+    class JSStack;
+#endif
+    
     class JITCode {
+#if ENABLE(JIT) || ENABLE(LLINT)
         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) || ENABLE(LLINT)
         JITCode()
+            : m_jitType(None)
         {
         }
 
-        JITCode(const CodeRef ref)
+        JITCode(const CodeRef ref, JITType jitType)
             : m_ref(ref)
+            , m_jitType(jitType)
         {
+            ASSERT(jitType != None);
         }
-
+        
         bool operator !() const
         {
-            return !m_ref.m_code.executableAddress();
+            return !m_ref;
         }
 
         CodePtr addressForCall()
         {
-            return m_ref.m_code;
+            return m_ref.code();
+        }
+
+        void* executableAddressAtOffset(size_t offset) const
+        {
+            ASSERT(offset < size());
+            return reinterpret_cast<char*>(m_ref.code().executableAddress()) + offset;
+        }
+        
+        void* executableAddress() const
+        {
+            return executableAddressAtOffset(0);
+        }
+        
+        void* dataAddressAtOffset(size_t offset) const
+        {
+            ASSERT(offset <= size()); // use <= instead of < because it is valid to ask for an address at the exclusive end of the code.
+            return reinterpret_cast<char*>(m_ref.code().dataLocation()) + offset;
         }
 
         // This function returns the offset in bytes of 'pointerIntoCode' into
@@ -68,51 +123,78 @@ namespace JSC {
         // 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());
+            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);
         }
 
+#if ENABLE(JIT)
         // Execute the code!
-        inline JSValue execute(RegisterFile* registerFile, CallFrame* callFrame, JSGlobalData* globalData, JSValue* exception)
+        inline JSValue execute(JSStack* stack, CallFrame* callFrame, VM* vm)
         {
-            return JSValue::decode(ctiTrampoline(m_ref.m_code.executableAddress(), registerFile, callFrame, exception, Profiler::enabledProfilerReference(), globalData));
+            JSValue result = JSValue::decode(ctiTrampoline(m_ref.code().executableAddress(), stack, callFrame, 0, 0, vm));
+            return vm->exception ? jsNull() : result;
         }
+#endif
 
-        void* start()
+        void* start() const
         {
-            return m_ref.m_code.dataLocation();
+            return m_ref.code().dataLocation();
         }
 
-        size_t size()
+        size_t size() const
         {
-            ASSERT(m_ref.m_code.executableAddress());
-            return m_ref.m_size;
+            ASSERT(m_ref.code().executableAddress());
+            return m_ref.size();
+        }
+        
+        bool tryToDisassemble(const char* prefix) const
+        {
+            return m_ref.tryToDisassemble(prefix);
         }
 
-        ExecutablePool* getExecutablePool()
+        ExecutableMemoryHandle* getExecutableMemory()
+        {
+            return m_ref.executableMemory();
+        }
+        
+        JITType jitType() const
         {
-            return m_ref.m_executablePool.get();
+            return m_jitType;
         }
 
         // 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)
+        static JITCode HostFunction(CodeRef code)
         {
-            return JITCode(code.dataLocation(), 0, 0);
+            return JITCode(code, HostCallThunk);
+        }
+
+        void clear()
+        {
+            m_ref.~CodeRef();
+            new (NotNull, &m_ref) CodeRef();
         }
 
     private:
-        JITCode(void* code, PassRefPtr<ExecutablePool> executablePool, size_t size)
-            : m_ref(code, executablePool, size)
+        JITCode(PassRefPtr<ExecutableMemoryHandle> executableMemory, JITType jitType)
+            : m_ref(executableMemory)
+            , m_jitType(jitType)
         {
         }
 
         CodeRef m_ref;
+        JITType m_jitType;
+#endif // ENABLE(JIT) || ENABLE(LLINT)
     };
 
-};
+} // namespace JSC
 
-#endif
+namespace WTF {
+
+class PrintStream;
+void printInternal(PrintStream&, JSC::JITCode::JITType);
+
+} // namespace WTF
 
 #endif