Re: [uml-devel] Re: Stop at startup on 2.6 NPTL hosts

[Blaisorblade <blaisorblade_spam@yahoo.it>]

On Wednesday 10 November 2004 22:19, Henrik Nordstrom wrote:
> On Wed, 10 Nov 2004, Geert Uytterhoeven wrote:
> > Why? getpid() is just an API call. No one guarantees it's actually a
> > syscall. And IMHO caching getpid() is allowed, since the returned value
> > won't change anyway.
The cache must be cleared on fork() (which is done) and on clone().

> And in case of pthreads SHOULD be different from the Linux process ID.
He was misunderstanding the thread - UML calls clone() without CLONE_THREAD, 
so that on this aspect it is fork()-like, so no thread group is created, just 
a child process. Which has a different PID. But glibc does not clean the 
thread-local-storage (or just the getpid() cached value in it) appropriately 
when using clone().
-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729


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