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

src/ia32/full-codegen-ia32.cc

Index: src/ia32/full-codegen-ia32.cc
diff --git a/src/ia32/full-codegen-ia32.cc b/src/ia32/full-codegen-ia32.cc
index 1a9aea241947c2af79a969a5a389428c3f6e5e3b..0daacbe1af9026af4b824d90a7a7c58a82ab97cb 100644
--- a/src/ia32/full-codegen-ia32.cc
+++ b/src/ia32/full-codegen-ia32.cc
@@ -130,6 +130,12 @@ void FullCodeGenerator::Generate() {
   }
 #endif
 
+  const FunctionEntryHook* hook_location = V8::GetFunctionEntryHookLocation();
+  if (*hook_location != NULL) {
+    ProfileEntryHookStub stub;
+    __ CallStub(&stub);
+  }
+
   // Strict mode functions and builtins need to replace the receiver
   // with undefined when called as functions (without an explicit
   // receiver object). ecx is zero for method calls and non-zero for
@@ -4550,7 +4556,6 @@ FullCodeGenerator::NestedStatement* FullCodeGenerator::TryFinally::Exit(
   return previous_;
 }
 
-
 #undef __
 
 } }  // namespace v8::internal