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Re: Moving pthread_(cond|mutex) to libc
Alan Barrett <apb%cequrux.com@localhost> wrote:
> > Starting with NetBSD 6.0, libpthread is cursed with the NOLOAD
> > flag, which means it cannot be loaded by dlopen(). The problem
> > is that we can easily get to dlopen'able modules that do not
> > use pthreads, but are linked to libraries that are linked with
> > -lpthread. Such module cannot be loaded anymore in NetBSD 6.0.
> Yes. And such modules would not work properly even if they were
> allowed to be loaded.
Why would they?
> Also, please lets get the overall design clarified before you
> write any code. I'd like to see a description of what would
> happen if a program starts without pthreads, creates and uses some
> condvars and mutexes, and then loads libpthread and continues
> using the already-created condvars and mutexes.
The proposed patch address that problem, by having libc stubs that fills
mutexes and condvars fields.
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