Re: [Qemu-devel] [PATCH] dump-guest-memory.py: skip vmcoreinfo section if not available

[Laszlo Ersek <lersek@redhat.com>]

On 01/31/18 11:41, Marc-André Lureau wrote:
> On some architectures, qemu doesn't support vmcoreinfo device,
> and dump-guest-memory fails:
> 
> (gdb) dump-guest-memory /tmp/vmcore  ppc64-le
> guest RAM blocks:
> target_start     target_end       host_addr        message count
> ---------------- ---------------- ---------------- ------- -----
> 0000000000000000 0000000200000000 00003ffd86980000 added       1
> 0000200080000000 0000200080800000 00003ffd86170000 added       2
> Python Exception <class 'gdb.error'> No symbol "vmcoreinfo_realize" in current context.:
> Error occurred in Python command: No symbol "vmcoreinfo_realize" in current context.
> 
> Check that vmcoreinfo_realize symbol exists before evaluating an
> expression with it.
> 
> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> ---
>  scripts/dump-guest-memory.py | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/scripts/dump-guest-memory.py b/scripts/dump-guest-memory.py
> index 03fbf69f8a..51acfcd0c0 100644
> --- a/scripts/dump-guest-memory.py
> +++ b/scripts/dump-guest-memory.py
> @@ -546,6 +546,8 @@ shape and this command should mostly work."""
>          return None
>  
>      def add_vmcoreinfo(self):
> +        if gdb.lookup_symbol("vmcoreinfo_realize")[0] is None:
> +            return
>          vmci = 'vmcoreinfo_realize::vmcoreinfo_state'
>          if not gdb.parse_and_eval("%s" % vmci) \
>             or not gdb.parse_and_eval("(%s)->has_vmcoreinfo" % vmci):
> 

Reviewed-by: Laszlo Ersek <lersek@redhat.com>