On Jul 12, 2007, at 4:46 AM, Christian Hoermann wrote:
Now, the question is whether the following code would leak memory
(under mod_perl) or work as intended. In other words, if the sub calls
die (the intended effect), will the temporaries still get cleaned up
in a persistent environment such as mod_perl?
sv_2mortal() exists to ensure that things that go onto the stack are
cleaned up if they are not otherwise stored.
As i understand it:
1. Create a new sv with refcount 1.
2. sv_2mortal() makes that refcount 0.
3. Put it on the stack, no refcount change.
4. call_sv(), stuff happens. there's a die().
5. somewhere, either in the die() or after, perl will free
everything on the orphaned stack, and your temps will be cleaned up.
Anyone with better internals knowledge than i (likely many on this
list), please correct me.
--
It's all very complicated and would take a scientist to explain it.
-- MST3K
