[V8] Use Function.name in Error.stack

src/messages.js

Index: src/messages.js
diff --git a/src/messages.js b/src/messages.js
index ba739987897417c7917901659d68f892cc8fe0ac..1f8ee652888c34c135d64fadacc6c95ed95f95ae 100644
--- a/src/messages.js
+++ b/src/messages.js
@@ -832,16 +832,17 @@ function CallSiteGetFunction() {
 
 function CallSiteGetFunctionName() {
   // See if the function knows its own name
-  var name = GET_PRIVATE(this, CallSiteFunctionKey).name;
-  if (name) {
+  var fun = GET_PRIVATE(this, CallSiteFunctionKey);
+  var name = %GetDataProperty(fun, 'name');

[Yang, 2015/03/10 10:48:55]

How about we make this part of %FunctionGetDebugName as well? So that we have
one single place where we decide on what function name to display, not two
places that act as fallback to each other.

[kozy, 2015/03/10 15:26:08]

Moved to JSFunction::DebugName.

+  if (IS_STRING(name)) {
     return name;
   }
-  name = %FunctionGetInferredName(GET_PRIVATE(this, CallSiteFunctionKey));
+  name = %FunctionGetDebugName(fun);
   if (name) {
     return name;
   }
   // Maybe this is an evaluation?
-  var script = %FunctionGetScript(GET_PRIVATE(this, CallSiteFunctionKey));
+  var script = %FunctionGetScript(fun);
   if (script && script.compilation_type == COMPILATION_TYPE_EVAL) {
     return "eval";
   }