From: ludo@gnu.org (Ludovic Courtès)
To: Mark H Weaver <mhw@netris.org>
Cc: 19973@debbugs.gnu.org
Subject: bug#19973: Grafts break debug outputs
Date: Tue, 07 Mar 2017 22:54:39 +0100 [thread overview]
Message-ID: <87a88wrbvk.fsf@gnu.org> (raw)
In-Reply-To: <878ufh71do.fsf@netris.org> (Mark H. Weaver's message of "Sun, 01 Mar 2015 00:06:11 -0500")
Mark H Weaver <mhw@netris.org> skribis:
> mhw@jojen:~$ guix build guile
> guix build: warning: ambiguous package specification `guile'
> guix build: warning: choosing guile-2.0.11 from gnu/packages/guile.scm:110:2
> /gnu/store/3lhr8q28q6f59774di9av7ncy09jd55d-guile-2.0.11
> /gnu/store/rgv3fvy6xqp6966rfh8v6fv7m48abcbh-guile-2.0.11-debug
> mhw@jojen:~$ guix package -I guile
> guile 2.0.11 out /gnu/store/3lhr8q28q6f59774di9av7ncy09jd55d-guile-2.0.11
> guile 2.0.11 debug /gnu/store/rgv3fvy6xqp6966rfh8v6fv7m48abcbh-guile-2.0.11-debug
> mhw@jojen:~$ ls -l .guix-profile/lib/debug/gnu/store/
> total 8
> lrwxrwxrwx 12 root guixbuild 128 Dec 31 1969 122jv790mv2mlnylbrbzav65vghbw93n-guile-2.0.11 -> /gnu/store/rgv3fvy6xqp6966rfh8v6fv7m48abcbh-guile-2.0.11-debug/lib/debug/gnu/store/122jv790mv2mlnylbrbzav65vghbw93n-guile-2.0.11
> lrwxrwxrwx 15 root guixbuild 127 Dec 31 1969 3g20rdmnavpblsmgppyl8jhg67nidhjk-glibc-2.20 -> /gnu/store/hrny2whqg9c3m0klyfpbmmcyiir9yf8m-gcc-toolchain-4.9.2/lib/debug/gnu/store/3g20rdmnavpblsmgppyl8jhg67nidhjk-glibc-2.20
>
> I guess GDB can't find the debugging information because
> 122jv790mv2mlnylbrbzav65vghbw93n-guile-2.0.11 is the name of the guile
> directory *before* grafting.
I wonder if the problem you described here still exists today.
However, one very likely problem is that .debug files include a CRC of
the binary they correspond to (info "(gdb) Separate Debug Files"), and
that CRC is not updated when we graft things.
We could change our grafting code to specifically address this problem
(using (guix elf) & co.).
Similar issue with build IDs: <https://bugs.gnu.org/25752>.
Ludo’.
next prev parent reply other threads:[~2017-03-07 21:55 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-01 5:06 bug#19973: Grafts break debug outputs Mark H Weaver
2015-03-01 5:24 ` Mark H Weaver
2017-03-07 21:54 ` Ludovic Courtès [this message]
2017-03-10 13:14 ` Ludovic Courtès
2018-08-21 20:53 ` Ludovic Courtès
2018-08-21 20:56 ` bug#19973: [PATCH 1/2] grafts: Add high-level 'graft' procedure on the build side Ludovic Courtès
2018-08-21 20:56 ` bug#19973: [PATCH 2/2] grafts: Add (guix build debug-link) and use it Ludovic Courtès
2018-08-22 14:04 ` bug#19973: Grafts break debug outputs Timothy Sample
2018-08-23 15:47 ` Ludovic Courtès
2018-08-24 16:08 ` Ludovic Courtès
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