where.lua (was: coroutines local userdata and GC)
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- Subject: where.lua (was: coroutines local userdata and GC)
- From: mniip <mniip@...>
- Date: 2014年11月18日 17:12:29 +0300
On 11/18/2014 10:14 AM, Sean Conner wrote:
> If it's not collected, then you are leaking references somewhere.
> -spc (Chasing down stray references isn't fun ... )
I've spent a little time and made a script [1] that traverses a lua
state searching for an object. Unless you mess with the ldblib/lbaselib
functions I can say with confidence that if my script doesn't find it -
it will be garbage-collected.
Example usage:
local where=require"where"
local hash
do
local t={}
hash = tostring(t)
function string.foo()
t=t
end
end
-- at this point we have no access to t, only to its address
print(where.where(hash))
Prints: select(2,debug.getupvalue(_G.string.foo,1))
More info on the usage is in the source.
[1] https://gist.github.com/mniip/70497b2a39b486a120e6
/* mniip */