Debian Bug report logs - #810295
WARNING: Serious error when reading debug info

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Martin Schwenke <martin@meltin.net>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: WARNING: Serious error when reading debug info

Date: Fri, 8 Jan 2016 13:31:48 +1100

Package: valgrind
Version: 1:3.11.0-1
Severity: important

When I run valgrind against anything, I see warnings like this:

$ valgrind -q /bin/echo
--14923-- WARNING: Serious error when reading debug info
--14923-- When reading debug info from /lib/x86_64-linux-gnu/ld-2.21.so:
--14923-- Ignoring non-Dwarf2/3/4 block in .debug_info
--14923-- WARNING: Serious error when reading debug info
--14923-- When reading debug info from /lib/x86_64-linux-gnu/ld-2.21.so:
--14923-- Last block truncated in .debug_info; ignoring
--14923-- WARNING: Serious error when reading debug info
--14923-- When reading debug info from /lib/x86_64-linux-gnu/ld-2.21.so:
--14923-- parse_CU_Header: is neither DWARF2 nor DWARF3 nor DWARF4
--14923-- WARNING: Serious error when reading debug info
--14923-- When reading debug info from /lib/x86_64-linux-gnu/libc-2.21.so:
--14923-- Ignoring non-Dwarf2/3/4 block in .debug_info
--14923-- WARNING: Serious error when reading debug info
--14923-- When reading debug info from /lib/x86_64-linux-gnu/libc-2.21.so:
--14923-- Last block truncated in .debug_info; ignoring
--14923-- WARNING: Serious error when reading debug info
--14923-- When reading debug info from /lib/x86_64-linux-gnu/libc-2.21.so:
--14923-- parse_CU_Header: is neither DWARF2 nor DWARF3 nor DWARF4

This might not actually be a valgrind bug...

  $ dwarfdump -i /usr/lib/debug/.build-id/1c/3104f034cf1caf07cdc1c4a5f342610146ebe5.debug

  .debug_info
  dwarfdump ERROR:  attempting to print .debug_info:  DW_DLE_CU_LENGTH_ERROR (47) (47)
  attempting to continue.

  $ dpkg -S /usr/lib/debug/.build-id/1c/3104f034cf1caf07cdc1c4a5f342610146ebe5.debug
  libc6-dbg:amd64: /usr/lib/debug/.build-id/1c/3104f034cf1caf07cdc1c4a5f342610146ebe5.debug

So it might be a libc6 bug.

However, I'm only seeing it causes problems in valgrind so, I guess,
this seems a good place to start...  :-)

Thanks...

peace & happiness,
martin

-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'stable-updates'), (500, 'stable'), (300, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.3.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages valgrind depends on:
ii  libc6      2.21-6
ii  libc6-dbg  2.21-6

Versions of packages valgrind recommends:
ii  gdb           7.10-1
pn  valgrind-dbg  <none>

Versions of packages valgrind suggests:
pn  alleyoop      <none>
pn  kcachegrind   <none>
pn  valgrind-mpi  <none>
pn  valkyrie      <none>

-- no debconf information

peace & happiness,
martin

Message #10 received at 810295@bugs.debian.org (full text, mbox, reply):

From: Andrea Stacchiotti <andreastacchiotti@gmail.com>

To: Debian Bug Tracking System <810295@bugs.debian.org>

Subject: Re: WARNING: Serious error when reading debug info

Date: Fri, 08 Jan 2016 23:44:11 +0100

Package: valgrind
Version: 1:3.11.0-1
Followup-For: Bug #810295

Confirmed also in sid, my error log is a bit different:

andreas@duelitri:~$ valgrind --tool=callgrind myprog -q 1024
==14153== Callgrind, a call-graph generating cache profiler
==14153== Copyright (C) 2002-2015, and GNU GPL'd, by Josef Weidendorfer et al.
==14153== Using Valgrind-3.11.0 and LibVEX; rerun with -h for copyright info
==14153== Command: myprog -q 1024
==14153==
==14153== For interactive control, run 'callgrind_control -h'.
--14153-- WARNING: Serious error when reading debug info
--14153-- When reading debug info from /lib/x86_64-linux-gnu/ld-2.21.so:
--14153-- Ignoring non-Dwarf2/3/4 block in .debug_info
--14153-- WARNING: Serious error when reading debug info
--14153-- When reading debug info from /lib/x86_64-linux-gnu/ld-2.21.so:
--14153-- Last block truncated in .debug_info; ignoring
--14153-- WARNING: Serious error when reading debug info
--14153-- When reading debug info from /lib/x86_64-linux-gnu/libm-2.21.so:
--14153-- Ignoring non-Dwarf2/3/4 block in .debug_info
--14153-- WARNING: Serious error when reading debug info
--14153-- When reading debug info from /lib/x86_64-linux-gnu/libm-2.21.so:
--14153-- Last block truncated in .debug_info; ignoring
--14153-- WARNING: Serious error when reading debug info
--14153-- When reading debug info from /lib/x86_64-linux-gnu/libc-2.21.so:
--14153-- Ignoring non-Dwarf2/3/4 block in .debug_info
--14153-- WARNING: Serious error when reading debug info
--14153-- When reading debug info from /lib/x86_64-linux-gnu/libc-2.21.so:
--14153-- Last block truncated in .debug_info; ignoring



-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.3.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=it_IT.UTF-8, LC_CTYPE=it_IT.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages valgrind depends on:
ii  libc6      2.21-6
ii  libc6-dbg  2.21-6

Versions of packages valgrind recommends:
ii  gdb           7.10-1
ii  valgrind-dbg  1:3.11.0-1

Versions of packages valgrind suggests:
pn  alleyoop      <none>
ii  kcachegrind   4:15.08.3-1
pn  valgrind-mpi  <none>
pn  valkyrie      <none>

-- no debconf information

Message #15 received at 810295@bugs.debian.org (full text, mbox, reply):

From: Alessandro Ghedini <ghedo@debian.org>

To: Martin Schwenke <martin@meltin.net>, 810295@bugs.debian.org

Cc: Andrea Stacchiotti <andreastacchiotti@gmail.com>

Subject: Re: Bug#810295: WARNING: Serious error when reading debug info

Date: Sat, 9 Jan 2016 14:15:16 +0000

[Message part 1 (text/plain, inline)]

On Fri, Jan 08, 2016 at 01:31:48PM +1100, Martin Schwenke wrote:
> Package: valgrind
> Version: 1:3.11.0-1
> Severity: important
> 
> When I run valgrind against anything, I see warnings like this:
> 
> $ valgrind -q /bin/echo
> --14923-- WARNING: Serious error when reading debug info
> --14923-- When reading debug info from /lib/x86_64-linux-gnu/ld-2.21.so:
> --14923-- Ignoring non-Dwarf2/3/4 block in .debug_info
> --14923-- WARNING: Serious error when reading debug info
> --14923-- When reading debug info from /lib/x86_64-linux-gnu/ld-2.21.so:
> --14923-- Last block truncated in .debug_info; ignoring
> --14923-- WARNING: Serious error when reading debug info
> --14923-- When reading debug info from /lib/x86_64-linux-gnu/ld-2.21.so:
> --14923-- parse_CU_Header: is neither DWARF2 nor DWARF3 nor DWARF4
> --14923-- WARNING: Serious error when reading debug info
> --14923-- When reading debug info from /lib/x86_64-linux-gnu/libc-2.21.so:
> --14923-- Ignoring non-Dwarf2/3/4 block in .debug_info
> --14923-- WARNING: Serious error when reading debug info
> --14923-- When reading debug info from /lib/x86_64-linux-gnu/libc-2.21.so:
> --14923-- Last block truncated in .debug_info; ignoring
> --14923-- WARNING: Serious error when reading debug info
> --14923-- When reading debug info from /lib/x86_64-linux-gnu/libc-2.21.so:
> --14923-- parse_CU_Header: is neither DWARF2 nor DWARF3 nor DWARF4
> 
> This might not actually be a valgrind bug...
> 
>   $ dwarfdump -i /usr/lib/debug/.build-id/1c/3104f034cf1caf07cdc1c4a5f342610146ebe5.debug
> 
>   .debug_info
>   dwarfdump ERROR:  attempting to print .debug_info:  DW_DLE_CU_LENGTH_ERROR (47) (47)
>   attempting to continue.
> 
>   $ dpkg -S /usr/lib/debug/.build-id/1c/3104f034cf1caf07cdc1c4a5f342610146ebe5.debug
>   libc6-dbg:amd64: /usr/lib/debug/.build-id/1c/3104f034cf1caf07cdc1c4a5f342610146ebe5.debug
> 
> So it might be a libc6 bug.
> 
> However, I'm only seeing it causes problems in valgrind so, I guess,
> this seems a good place to start...  :-)

I think this may be related to https://bugs.debian.org/780173. The glibc
package recently enabled compressed debug symbols but valgrind doesn't
support them yet. Though I'm not sure what would be a good way to verify
this.

As for solutions, we can wait for valgrind to add support for compressed
symbols or ask the glibc maintainers to not compress debug symbols. Either
way there's not much I, as maintainer of valgrind, can do about this.

Cheers

[signature.asc (application/pgp-signature, inline)]

Message #20 received at 810295@bugs.debian.org (full text, mbox, reply):

From: Timo Sirainen <tss@iki.fi>

To: 810295@bugs.debian.org

Subject: Re: Bug#810295: WARNING: Serious error when reading debug info

Date: Sun, 8 May 2016 18:23:32 +0300

On Sat, 9 Jan 2016 14:15:16 +0000 Alessandro Ghedini <ghedo@debian.org> wrote:
> On Fri, Jan 08, 2016 at 01:31:48PM +1100, Martin Schwenke wrote:
> > Package: valgrind
> > Version: 1:3.11.0-1
> > Severity: important
> > 
> > When I run valgrind against anything, I see warnings like this:
> > 
> > $ valgrind -q /bin/echo
> > --14923-- WARNING: Serious error when reading debug info
> > --14923-- When reading debug info from /lib/x86_64-linux-gnu/ld-2.21.so:
> > --14923-- Ignoring non-Dwarf2/3/4 block in .debug_info
> > --14923-- WARNING: Serious error when reading debug info
> > --14923-- When reading debug info from /lib/x86_64-linux-gnu/ld-2.21.so:
> > --14923-- Last block truncated in .debug_info; ignoring
> > --14923-- WARNING: Serious error when reading debug info
> > --14923-- When reading debug info from /lib/x86_64-linux-gnu/ld-2.21.so:
> > --14923-- parse_CU_Header: is neither DWARF2 nor DWARF3 nor DWARF4
> > --14923-- WARNING: Serious error when reading debug info
> > --14923-- When reading debug info from /lib/x86_64-linux-gnu/libc-2.21.so:
> > --14923-- Ignoring non-Dwarf2/3/4 block in .debug_info
> > --14923-- WARNING: Serious error when reading debug info
> > --14923-- When reading debug info from /lib/x86_64-linux-gnu/libc-2.21.so:
> > --14923-- Last block truncated in .debug_info; ignoring
> > --14923-- WARNING: Serious error when reading debug info
> > --14923-- When reading debug info from /lib/x86_64-linux-gnu/libc-2.21.so:
> > --14923-- parse_CU_Header: is neither DWARF2 nor DWARF3 nor DWARF4
> 
> I think this may be related to https://bugs.debian.org/780173. The glibc
> package recently enabled compressed debug symbols but valgrind doesn't
> support them yet. Though I'm not sure what would be a good way to verify
> this.
> 
> As for solutions, we can wait for valgrind to add support for compressed
> symbols or ask the glibc maintainers to not compress debug symbols. Either
> way there's not much I, as maintainer of valgrind, can do about this.

Looks like valgrind upstream implemented support for compressed debug symbols: https://bugs.kde.org/show_bug.cgi?id=303877

Would be nice to get it included in the Debian valgrind package.

Message #29 received at 810295@bugs.debian.org (full text, mbox, reply):

From: Max Dmitrichenko <dmitrmax@gmail.com>

To: Debian Bug Tracking System <810295@bugs.debian.org>

Subject: Re: WARNING: Serious error when reading debug info

Date: Sun, 19 Jun 2016 17:50:14 +0000

[Message part 1 (text/plain, inline)]

Package: valgrind
Version: 1:3.11.0-1
Followup-For: Bug #810295

Please find a debdiff in attachment. Backported from the upstream.

-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/dash
Init: unable to detect

Versions of packages valgrind depends on:
ii  libc6      2.22-11
ii  libc6-dbg  2.22-11

Versions of packages valgrind recommends:
ii  gdb           7.10-1.1
ii  valgrind-dbg  1:3.11.0-1

Versions of packages valgrind suggests:
pn  alleyoop      <none>
pn  kcachegrind   <none>
pn  valgrind-mpi  <none>
pn  valkyrie      <none>

-- no debconf information

[valgrind-compressed.patch (text/x-diff, attachment)]

Message #36 received at 810295@bugs.debian.org (full text, mbox, reply):

From: Martin Schwenke <martin@meltin.net>

To: 810295@bugs.debian.org

Subject: Re: WARNING: Serious error when reading debug info

Date: Fri, 15 Jul 2016 07:13:26 +1000

On Sun, 19 Jun 2016 17:50:14 +0000 Max Dmitrichenko
<dmitrmax@gmail.com> wrote:
> Package: valgrind
> Version: 1:3.11.0-1
> Followup-For: Bug #810295
> 
> Please find a debdiff in attachment. Backported from the upstream.

Thanks, this seems to work for me!

Is anyone able to build and upload?

Thanks...

peace & happiness,
martin

Message #41 received at 810295-close@bugs.debian.org (full text, mbox, reply):

From: Alessandro Ghedini <ghedo@debian.org>

To: 810295-close@bugs.debian.org

Subject: Bug#810295: fixed in valgrind 1:3.12.0~svn20160714-1

Date: Thu, 14 Jul 2016 23:51:48 +0000

Source: valgrind
Source-Version: 1:3.12.0~svn20160714-1

We believe that the bug you reported is fixed in the latest version of
valgrind, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 810295@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Alessandro Ghedini <ghedo@debian.org> (supplier of updated valgrind package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)


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Hash: SHA512

Format: 1.8
Date: Fri, 15 Jul 2016 00:15:43 +0100
Source: valgrind
Binary: valgrind valgrind-dbg valgrind-mpi
Architecture: source amd64
Version: 1:3.12.0~svn20160714-1
Distribution: unstable
Urgency: medium
Maintainer: Alessandro Ghedini <ghedo@debian.org>
Changed-By: Alessandro Ghedini <ghedo@debian.org>
Description:
 valgrind   - instrumentation framework for building dynamic analysis tools
 valgrind-dbg - instrumentation framework for building dynamic analysis tools (de
 valgrind-mpi - instrumentation framework for building dynamic analysis tools (MP
Closes: 810295 819813
Changes:
 valgrind (1:3.12.0~svn20160714-1) unstable; urgency=medium
 .
   * New upstream snapshot release
     - Add support for compressed debuginfo (Closes: #810295)
   * Drop MIPS patches (merged/fixed upstream)
   * Refresh patches
   * Add smoke test for autopkgtest
     Thanks to dann frazier for the patch (Closes: #819813)
   * Update 07_fix-spelling-in-binary.patch
   * Update Standards-Version to 3.9.8 (no changes needed)
   * Update Vcs-* URLs
Checksums-Sha1:
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 3f6955d980b23da8a9cfedabb8d48fbb70a89b1e89295bc0cffcb2ae480e2de8 10608951 valgrind_3.12.0~svn20160714.orig.tar.bz2
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 c1a00d561209dab6353fcd4bb8ce84d0 2556 devel optional valgrind_3.12.0~svn20160714-1.dsc
 10b2c1b3366bddee9188d07ac318bd48 10608951 devel optional valgrind_3.12.0~svn20160714.orig.tar.bz2
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