[SM] stack[0].getFileName() missing

[stefanpenner]

The V8 specific (I believe) stack[0].getFileName() method is missing in SM (and likely vms), some node code depends on this, to discover the location (on-disk) of a caller.

If there is an alternative for SM, I could just implement it that way. Although it would be nice if some standard was eventually derived.

[obastemur]

JXcore SM build has a patch for V8's Error.captureStackTrace and it should behave similarly.

try {
  throw new Error("AAA");
} catch(e) {
  Error.captureStackTrace(e);
  console.log(e.stack[0].getFileName());
}

I've just tested the code above and it behaves as expected with SM build.

[stefanpenner]

Although I get get it to work in isolation, i appear to not be able to get it to work in my specific (more complex example). I'm going to try and isolate it further

[stefanpenner]

Actually, I believe my example is more similar to this SO response: http://stackoverflow.com/a/13227808

module.exports = getCallerFile;
function getCallerFile() {
  var oldPrepareStackTrace = Error.prepareStackTrace;
  Error.prepareStackTrace = function(err, stack) { return stack; };
  var stack = new Error().stack;
  Error.prepareStackTrace = oldPrepareStackTrace;

  // stack[0] holds this file
  // stack[1] holds where this function was called
  // stack[2] holds the file we're interested in
  return stack[2] ? stack[2].getFileName() : undefined;
}

which, when run in node results in:

> getCallerFile()
'repl.js'

The example provided in #728 (comment) does not appear to work in v8@4.6.85.28

[obastemur]

@stefanpenner Thanks for all the details. Fix will be part of 0.3.1.0 (ee19070)

[stefanpenner]

@obastemur very nice, will give 0.3.1.0 a go sometime.

Keep up the good work!