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[TODO: tracerunner description]

Tracerunner issues:

• speed
  • speed is too slow for android monkey exercising
  • takes a long time to generate manual traces especially for callback heavy things like material
• data recording
  • native callbacks: a callback may be invoked through native code and this does not go through the "dispatch method" call. View has one of these (perhaps on onTouchEvent? TODO: figure out)
  • native callins: calls to native code are not registered as callins, for example prepareAsync on the Android Media Player.
  • return values: In some cases the way a developer knows what state an object is in is by how it is returned from a method call. For example when inflating a view the inflate method (on LayoutInflater) will automatically attach the view to a root, if the developer does not want this to happen then the inflate method can optionally take a third parameter set to false telling it to not attach.
  • Control flow which lead to a callin occurring within a callback is not captured.