Hiding the calling function

[Danny Dorfman]

Hi there,

I need to write an application that runs some mixed JavaScript code. What I mean by "mixed", is that some of the code is mine, and some is external.

My code will be calling some external code, but I would like to conceal the call stack. In other words, in a scenario like this:

// my code

function myFunc()

{

   extFunc();

}

// external code

function extFunc()

{

   if (arguments.callee.caller == null)

   {

        console.log("okay");

   }

}

I would like the last "if" to evaluate true. Can it be done via a wrapper in V8, or in plain JavaScript?

Regards,

D.

[Ben Noordhuis]

Code that is baked into the snapshot through the
v8_extra_library_files variable won't show up in stack traces but
apart from that there is no way to hide a caller.

If you're willing to hack on V8, I think it's as easy as
function->shared()->script()->set_type(Script::TYPE_NATIVE).

[Andreas Rossberg]

On 29 September 2015 at 15:41, Danny Dorfman <wilder...@gmail.com> wrote:
> Hi there,
>

> I need to write an application that run some mixed JavaScript code. What I
> mean by mixed, is that some of the code is mine, and some is external.

> My code will be calling some external code, but I would like to conceal the
> call stack.

If your function is in strict mode, it cannot be discovered via the
.caller property, nor does it have one itself. Any attempt to do so
will either throw or return undefined.

/Andreas

[Danny Dorfman]

Hey Andreas. Your solution worked like magic. Very elegant. Thanks!