[Crash-utility] crash does not work with last fedora kernels?

[lijiang]

在 2021年04月26日 19:17, crash-utility-request at redhat.com 写道:
> Message: 3
> Date: Mon, 26 Apr 2021 11:27:40 +0300
> From: Vasily Averin <vvs at virtuozzo.com>
> To: crash-utility at redhat.com
> Subject: [Crash-utility] crash does not work with last fedora kernels?
> Message-ID: <8f8782a9-3da6-5d3c-c509-8b8ec8a30957 at virtuozzo.com>
> Content-Type: text/plain; charset=utf-8
> 
> It looks like Fedora kernels uses gcc11 and generates debuginfo in DWARF 5 format.
> 
> [root at localhost ~]# rpm -q crash
> crash-7.2.9-5.fc35.x86_64
> [root at localhost ~]# uname -a
> Linux localhost.localdomain 5.11.12-300.fc34.x86_64 #1 SMP Wed Apr 7 16:31:13 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
> 
> 
> [root at localhost ~]# crash -1
> Dwarf Error: wrong version in compilation unit header (is 5, should be 2, 3, or 4) [in module /usr/lib/debug/usr/lib/modules/5.11.12-300.fc34.x86_64/vmlinux]
> crash: gdb_session_init: pulling in debug data by accessing init_mm.mmap 
> Dwarf Error: wrong version in compilation unit header (is 5, should be 2, 3, or 4) [in module /usr/lib/debug/usr/lib/modules/5.11.12-300.fc34.x86_64/vmlinux]
> 
> crash: /usr/lib/debug/lib/modules/5.11.12-300.fc34.x86_64/vmlinux: no debugging data available
> 
> [root at localhost ~]# ls -al /usr/lib/debug/lib/modules/5.11.12-300.fc34.x86_64/vmlinux
> -rwxr-xr-x. 1 root root 679679112 Apr  7 20:14 /usr/lib/debug/lib/modules/5.11.12-300.fc34.x86_64/vmlinux
> [root at localhost ~]# rpm -qf /usr/lib/debug/lib/modules/5.11.12-300.fc34.x86_64/vmlinux
> kernel-debuginfo-5.11.12-300.fc34.x86_64
> 
> NB: last fc35 does not work too.
> 

Thank you for reporting this issue, Vasily.

The DWARF-5 caused this failure. I will have a look and try to handle this issue later.

Thanks.
Lianbo

> Thank you,
> 	Vasily Averin