Get information about original function from bound function

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index aee9e3a469eae454a9fdc7b241142050044a730a..499050d73b24dc98627b651e53561cdd15e5c25a 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -128,6 +128,18 @@ namespace v8 {
   } while (false)
 
 
+static i::Handle<i::JSFunction> GetOriginalFunctionFromBound(
+    i::Handle<i::JSFunction> bound_function) {
+  i::Handle<i::FixedArray> bound_args = i::Handle<i::FixedArray>(
+      i::FixedArray::cast(bound_function->function_bindings()));
+  i::Handle<i::Object> orig_function(
+      i::JSReceiver::cast(bound_args->get(
+                              i::JSFunction::kBoundFunctionIndex)),
+      i::Isolate::Current());
+  return i::Handle<i::JSFunction>::cast(orig_function);
+}
+
+
 // --- E x c e p t i o n   B e h a v i o r ---
 
 
@@ -4207,6 +4219,9 @@ void Function::SetName(v8::Handle<v8::String> name) {
 
 Handle<Value> Function::GetName() const {
   i::Handle<i::JSFunction> func = Utils::OpenHandle(this);
+  if (func->shared()->bound()) {

[yurys, 2013/12/09 12:17:16]

We should add Function::GetBoundFunction() instead of adding additional logic
into many Function methods.

[Alexandra Mikhaylova, 2013/12/12 12:41:14]

Done.

+    func = GetOriginalFunctionFromBound(func);
+  }
   return Utils::ToLocal(i::Handle<i::Object>(func->shared()->name(),
                                              func->GetIsolate()));
 }
@@ -4214,6 +4229,9 @@ Handle<Value> Function::GetName() const {
 
 Handle<Value> Function::GetInferredName() const {
   i::Handle<i::JSFunction> func = Utils::OpenHandle(this);
+  if (func->shared()->bound()) {
+    func = GetOriginalFunctionFromBound(func);
+  }
   return Utils::ToLocal(i::Handle<i::Object>(func->shared()->inferred_name(),
                                              func->GetIsolate()));
 }
@@ -4226,6 +4244,9 @@ Handle<Value> Function::GetDisplayName() const {
                 isolate->factory()->undefined_value()));
   ENTER_V8(isolate);
   i::Handle<i::JSFunction> func = Utils::OpenHandle(this);
+  if (func->shared()->bound()) {
+    func = GetOriginalFunctionFromBound(func);
+  }
   i::Handle<i::String> property_name =
       isolate->factory()->InternalizeOneByteString(
           STATIC_ASCII_VECTOR("displayName"));
@@ -4244,6 +4265,9 @@ Handle<Value> Function::GetDisplayName() const {
 
 ScriptOrigin Function::GetScriptOrigin() const {
   i::Handle<i::JSFunction> func = Utils::OpenHandle(this);
+  if (func->shared()->bound()) {
+    func = GetOriginalFunctionFromBound(func);
+  }
   if (func->shared()->script()->IsScript()) {
     i::Handle<i::Script> script(i::Script::cast(func->shared()->script()));
     i::Handle<i::Object> scriptName = GetScriptNameOrSourceURL(script);
@@ -4262,6 +4286,9 @@ const int Function::kLineOffsetNotFound = -1;
 
 int Function::GetScriptLineNumber() const {
   i::Handle<i::JSFunction> func = Utils::OpenHandle(this);
+  if (func->shared()->bound()) {
+    func = GetOriginalFunctionFromBound(func);
+  }
   if (func->shared()->script()->IsScript()) {
     i::Handle<i::Script> script(i::Script::cast(func->shared()->script()));
     return i::GetScriptLineNumber(script, func->shared()->start_position());
@@ -4272,6 +4299,9 @@ int Function::GetScriptLineNumber() const {
 
 int Function::GetScriptColumnNumber() const {
   i::Handle<i::JSFunction> func = Utils::OpenHandle(this);
+  if (func->shared()->bound()) {
+    func = GetOriginalFunctionFromBound(func);
+  }
   if (func->shared()->script()->IsScript()) {
     i::Handle<i::Script> script(i::Script::cast(func->shared()->script()));
     return i::GetScriptColumnNumber(script, func->shared()->start_position());
@@ -4299,6 +4329,9 @@ Handle<Value> Function::GetScriptId() const {
 
 int Function::ScriptId() const {
   i::Handle<i::JSFunction> func = Utils::OpenHandle(this);
+  if (func->shared()->bound()) {
+    func = GetOriginalFunctionFromBound(func);
+  }
   if (!func->shared()->script()->IsScript()) return v8::Script::kNoScriptId;
   i::Handle<i::Script> script(i::Script::cast(func->shared()->script()));
   return script->id()->value();