Date: Thu, 23 Aug 2001 10:38:31 -0700 (PDT) From: Matt Dillon <dillon@earth.backplane.com> To: Julian Elischer <julian@elischer.org> Cc: Alfred Perlstein <bright@mu.org>, Bernd Walter <ticso@mail.cicely.de>, freebsd-hackers@freebsd.org Subject: Re: mmap MAP_INHERIT question. Message-ID: <200108231738.f7NHcVo87785@earth.backplane.com> References: <Pine.BSF.4.21.0108231012330.48732-100000@InterJet.elischer.org>
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MAP_INHERIT is broken and always has been. -Matt :exec gives you an new vm space.. :inherrit only applies to forks : : :On Thu, 23 Aug 2001, Alfred Perlstein wrote: : :> * Bernd Walter <ticso@mail.cicely.de> [010823 06:16] wrote: :> > I do the following: :> > buf = (char*)mmap(NULL, BUFSIZE, PROT_READ | PROT_WRITE, :> > MAP_ANON | MAP_INHERIT | MAP_SHARED, -1, 0); :> > :> > Now I vfork/execve a child. :> > But the child can't access the mmaped memory. :> > It was my understanding that MAP_INHERIT | MAP_SHARED keep the memory :> > over the execve. :> :> Without sample code this is impossible to explain. :> :> -- :> -Alfred Perlstein [alfred@freebsd.org] :> Ok, who wrote this damn function called '??'? :> And why do my programs keep crashing in it? :> :> To Unsubscribe: send mail to majordomo@FreeBSD.org :> with "unsubscribe freebsd-hackers" in the body of the message :> : : :To Unsubscribe: send mail to majordomo@FreeBSD.org :with "unsubscribe freebsd-hackers" in the body of the message : To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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