Date: Sat, 30 Jun 2007 11:44:56 -0700 From: John-Mark Gurney <gurney_j@resnet.uoregon.edu> To: Michiel Boland <michiel@boland.org> Cc: freebsd-current@freebsd.org Subject: Re: sigsuspend gets interrupted by ptrace Message-ID: <20070630184456.GK1221@funkthat.com> In-Reply-To: <Pine.GSO.4.64.0706301630130.29170@neerbosch.nijmegen.internl.net> References: <Pine.GSO.4.64.0706301630130.29170@neerbosch.nijmegen.internl.net>
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Michiel Boland wrote this message on Sat, Jun 30, 2007 at 16:30 +0200:
> Consider this simple program:
>
> #include <unistd.h>
>
> int main(void)
> {
> pause();
> return 0;
> }
>
> $ ./a.out &
> $ truss -p `pgrep a.out`
> process exit, rval = 0
> [1] Done ./a.out
> $
>
> Surely this must be wrong. The program should have just continued running
> after truss was attached to it.
>
> (PR Filed under kern/114155)
This is probably related to a problem where if you kill yourself w/
SIGSTOP so you can attach to it w/ gdb, you have to put a second
SIGSTOP so that execution will stop after gdb attaches,
otherwise like your example, execution continues past where you wanted..
--
John-Mark Gurney Voice: +1 415 225 5579
"All that I will do, has been done, All that I have, has not."
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