There is a class GlideController. It's not documented. However you have definitly come across it. In client-callable script include, for example. Or in OOTB code :)
class
close
enforceSecurity
enforcingSecurity
equals
evaluate
evaluateAsObject
evaluateGeneratedString
evaluateSilent
evaluateString
evaluateStringWithPrefix
exceptionHandler
getClass
getExceptionHandler
getGlobalScope
getSlowEvalWarn
globalScope
hashCode
haveError
interpretedMode
interpretString
isEnforcingSecurity
legacyStrictMode
locate
notify
notifyAll
putAction
setEnforceSecurity
setExceptionHandler
setInterpretedMode
setLegacyStrictMode
slowEvalWarn
toString
tryQuickEval
wait