Date: Sun, 6 Jan 2002 16:50:01 -0800 (PST) From: k Macy <kip_macy@yahoo.com> To: freebsd-bugs@FreeBSD.org Subject: Re: ptrace bug was Re: gnu/33262: gdb does not handle pending signals correctly when single stepping Message-ID: <200201070050.g070o1N62260@freefall.freebsd.org>
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The following reply was made to PR gnu/33262; it has been noted by GNATS.
From: k Macy <kip_macy@yahoo.com>
To: Bruce Evans <bde@zeta.org.au>
Cc: freebsd-gnats-submit@FreeBSD.ORG
Subject: Re: ptrace bug was Re: gnu/33262: gdb does not handle pending signals correctly when single stepping
Date: Sun, 6 Jan 2002 16:46:57 -0800 (PST)
When can we get your fixes committed? Using gdb 5.1
(see below) they appear to completely solve the
problem.
> (3) "stepi" seems to work perfectly with these fixes
> for (1) and (2), but
> "next" rarely works. gdb apparently gets
> confused about the temporary
> breakpoints that it sets for "next". It gets
> SIGTRAPs for them and
> should remove them and continue with single
> steps, but it leaves them
> in and spins getting SIGTRAPs (and SIGALRMs in
> the test program). This
> is with gdb-4.18.
>
My experience with -CURRENT installed from today's
snapshot:
FreeBSD weizen.extendedsolutions.com
5.0-20020106-CURRENT FreeBSD 5.0-20020106-CURRENT #1:
Sun Jan 6 16:22:13 PST 2002
root@goober.extendedsolutions:/usr/src/sys/i386/compile/HADES
i386
is that with 4.18 next works until the sleep, but
the sleep never returns. With 5.1 it works correctly,
so as soon as FreeBSD upgrades to 5.1 one we can mark
the bug fixed. If by lending a hand I can accelerate
that process I would be happy to do the work, e.g.
migrating freebsd-uthread.c, the kernel core debug
functionality etc.
a brief excerpt from 5.1:
(gdb) n
60 i = 0;
(gdb) n
62 j = 0;
(gdb)
63 printf("milliseconds elapsed
is %d\n", sk_msecs4);
(gdb)
milliseconds elapsed is 243
64 test_sleep(2);
(gdb)
65 }
(gdb)
60 i = 0;
(gdb)
62 j = 0;
(gdb)
63 printf("milliseconds elapsed
is %d\n", sk_msecs4);
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