> > i dont like those semantics either - will verify whether thread-specific
> > exec() works via a helper thread (or vfork) - it really should.
> As long as it works with something sane (and vfork() is sane), I'm happy
> with the posix behaviour by default. [...]
yes - the default case is very similar to that: exec() works for a
1-member thread_group, otherwise i couldnt have booted the kernel.
> [...] After all, the execve() really _does_ need to "de-thread" anyway,
> and if we need to make that explicit (with the vfork()) then that's
ok. libpthreads uses an internal clone() for posix_spawn() [which does
what your example illustrates] which should be a tad faster than vfork() -
but vfork() should work just as well.
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