Provide access to function inferred name in v8 public API

Review URL: https://chromiumcodereview.appspot.com/9146039

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10499 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

include/v8.h

@@ -1731,6 +1731,14 @@ class Function : public Object {
   V8EXPORT void SetName(Handle<String> name);
   V8EXPORT Handle<Value> GetName() const;
 
+  /**
+   * Name inferred from variable or property assignment of this function.
+   * Used to facilitate debugging and profiling of JavaScript code written
+   * in an OO style, where many functions are anonymous but are assigned
+   * to object properties.
+   */
+  V8EXPORT Handle<Value> GetInferredName() const;
+
   /**
    * Returns zero based line number of function body and
    * kLineOffsetNotFound if no information available.

src/api.cc

@@ -3622,6 +3622,12 @@ Handle<Value> Function::GetName() const {
 }
 
 
+Handle<Value> Function::GetInferredName() const {
+  i::Handle<i::JSFunction> func = Utils::OpenHandle(this);
+  return Utils::ToLocal(i::Handle<i::Object>(func->shared()->inferred_name()));
+}
+
+
 ScriptOrigin Function::GetScriptOrigin() const {
   i::Handle<i::JSFunction> func = Utils::OpenHandle(this);
   if (func->shared()->script()->IsScript()) {

test/cctest/test-api.cc

@@ -14042,6 +14042,17 @@ THREADED_TEST(ScriptOrigin) {
   CHECK_EQ(0, script_origin_g.ResourceLineOffset()->Int32Value());
 }
 
+THREADED_TEST(FunctionGetInferredName) {
+  v8::HandleScope scope;
+  LocalContext env;
+  v8::ScriptOrigin origin = v8::ScriptOrigin(v8::String::New("test"));
+  v8::Handle<v8::String> script = v8::String::New(
+      "var foo = { bar : { baz : function() {}}}; var f = foo.bar.baz;");
+  v8::Script::Compile(script, &origin)->Run();
+  v8::Local<v8::Function> f = v8::Local<v8::Function>::Cast(
+      env->Global()->Get(v8::String::New("f")));
+  CHECK_EQ("foo.bar.baz", *v8::String::AsciiValue(f->GetInferredName()));
+}
 
 THREADED_TEST(ScriptLineNumber) {
   v8::HandleScope scope;