[erlang-questions] How does code:purge/1 know to kill processes?
Thu Jun 9 09:44:05 CEST 2016
Roger Lipscombe writes:
> The documentation for code:purge/1
> (http://erlang.org/doc/man/code.html#purge-1) says "If some processes
> still linger in the old code, these processes are killed before the
> code is removed."
> How is "lingering" defined?
> Does the VM kill the process when it attempts to invoke the old module?
> Does the VM walk the stack for all processes and kill those that have
> the old code somewhere in their call stack?
My understanding is that it's the latter, i.e., if you're currently in
a to-be-deleted module, or you have a return address referring to one,
then you get killed.
I'm not sure how FUNs are handled.
> Something else?
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