Lua 5 getglobals

["Wim Couwenberg" <w.couwenberg@...>]

Hi,

I encoutered a problem with the getglobals call in Lua 5.

In a particular function I want to retrieve the globals table of the
_calling_ function, so I do a getglobals(2).  (I want to "switch" to the
caller's context.)  However, sometimes this does _not_ return the callers
globals!  After some fiddling I tracked  the problem down to Lua's use of
optimized tail calls.  Because tail calls reuse a stackframe instead of
creating a new one, a getglobals(n) will effectively skip all tail calls and
end up at a higher level than expected.

Is there a way around this, or is there another (better) way to get the
callers globals table?

Thanks,
Wim