Implements a new API to set a function entry hook for profiling.

src/code-stubs.h

Index: src/code-stubs.h
diff --git a/src/code-stubs.h b/src/code-stubs.h
index 5c8717838f8da0ac6b919e70bbb300d3966612dc..7a269aab98fcd0d315948b1893cd3119342cb5f7 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -73,7 +73,8 @@ namespace internal {
   V(DebuggerStatement)                   \
   V(StringDictionaryLookup)              \
   V(ElementsTransitionAndStore)          \
-  V(StoreArrayLiteralElement)
+  V(StoreArrayLiteralElement)            \
+  V(ProfileEntryHook)
 
 // List of code stubs only used on ARM platforms.
 #ifdef V8_TARGET_ARCH_ARM
@@ -1145,6 +1146,23 @@ class StoreArrayLiteralElementStub : public CodeStub {
   DISALLOW_COPY_AND_ASSIGN(StoreArrayLiteralElementStub);
 };
 

[danno, 2012/07/10 09:37:13]

Two empty lines between classes

[Sigurður Ásgeirsson, 2012/07/11 14:50:34]

Done.

+class ProfileEntryHookStub : public CodeStub {
+ public:
+  explicit ProfileEntryHookStub() {}
+
+  static void GenerateAheadOfTime();
+  // DO NOT SUBMIT.
+  virtual bool SometimesSetsUpAFrame() { return false; }
+
+ private:
+  Major MajorKey() { return ProfileEntryHook; }
+  int MinorKey() { return 0; }
+
+  void Generate(MacroAssembler* masm);
+
+  DISALLOW_COPY_AND_ASSIGN(ProfileEntryHookStub);
+};
+
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_