[PATCH][gdb/testsuite] Add KFAIL for missing support of reverse-debugging xsave

[Simon Marchi]

On 2019-09-27 11:11, Tom de Vries wrote:
> Hi,
> 
> Normally the gdb.reverse/*.exp test-cases pass on my system (apart from 
> the
> record/23188 KFAIL for gdb.reverse/step-precsave.exp).  But when 
> specifying
> GLIBC_TUNABLES=glibc.tune.hwcaps=-XSAVEC_Usable to force glibc to use
> _dl_runtime_resolve_xsave instead of _dl_runtime_resolve_xsavec, we run 
> into
> 1054 FAILs like this:
> ...
> (gdb) PASS: gdb.reverse/sigall-reverse.exp: b gen_HUP
> continue^M
> Continuing.^M
> Process record does not support instruction 0xfae64 at address \
>   0x7ffff7ded958.^M
> Process record: failed to record execution log.^M
> ^M
> Program stopped.^M
> 0x00007ffff7ded958 in _dl_runtime_resolve_xsave () from \
>   /lib64/ld-linux-x86-64.so.2^M
> (gdb) FAIL: gdb.reverse/sigall-reverse.exp: get signal ABRT
> ...
> 
> The problem is that the xsave instruction is not supported in
> reverse-debugging (PR record/25038).
> 
> Add KFAILs for this PR.
> 
> Tested on x86_64-linux.
> 
> OK for trunk?

Hi Tom,

That looks good to me in general.  Just one note here:

> @@ -289,8 +295,12 @@ set sig_supported 1
>  set thissig "ABRT"
> 
>  # test signal handling
> +set record_instruction_kfail 0
>  foreach sig [lrange $signals 1 end] {
>      test_one_sig $sig
> +    if { $record_instruction_kfail } {
> +	return -1
> +    }

It seems like record_instruction_kfail is never set in this file, 
sigall-precsave.exp, I suppose it should?

Simon