Re: [Valgrind-developers] Dwarf

[Mark W. <mj...@re...>]

Hi Bob,

On Wed, 2016-02-10 at 14:49 +0000, Bob LaMain wrote:
> But, recently, when using valgrind on my Debian machines, it constantly report warnings like:
> 
>    WARNING: Serious error when reading debug info
>    When reading debug info from /lib/i386-linux-gnu/ld-2.21.so
>    Ignoring non-Dwarf2/3/4 block in .debug_info
>    ...
> 
> It seems related to the reported bug:
>     https://bugs.kde.org/show_bug.cgi?id=303877
> 
> So,
> Did the bug has been properly reported to valgrind developers ?
> And if so, did somebody already working on it ?
> How can i help resolving this issue ?

Best would be to make sure Debian doesn't use ELF section compression
(and especially not different variants). There are better and more
supported ways to compress debuginfo [*]. If you are stuck with such a
debuginfo file and you have elfutils 0.165+ installed then you can fix
them by decompressing using eu-elfcompress -t none.

That said, the issue is known, and there have been some suggestions how
a fix might possible be done, but nobody is working on it. See the bug
report for more info if you want to help out with that.

Cheers,

Mark

[*]
https://gnu.wildebeest.org/blog/mjw/2016/02/02/where-are-your-symbols-debuginfo-and-sources/#Compressing