[PATCH][gdb/testsuite] Fix gdb.btrace/tsx.exp on system with tsx disabled in microcode

[Metzger, Markus T]

Hello Tom,

> diff --git a/gdb/testsuite/gdb.btrace/tsx.exp b/gdb/testsuite/gdb.btrace/tsx.exp
> index ccde1ea807e..66f6305e50a 100644
> --- a/gdb/testsuite/gdb.btrace/tsx.exp
> +++ b/gdb/testsuite/gdb.btrace/tsx.exp
> @@ -59,6 +59,11 @@ set abort_2 [multi_line \
>      "\[0-9\]*\t   0x\[0-9a-f\]+ <test\\+\[0-9\]+>:\tmov\[^\\\r\\\n\]*" \
>      "\[0-9\]*\t   0x\[0-9a-f\]+ <test\\+\[0-9\]+>:\tret\[^\\\r\\\n\]*" \
>      ]
> +set abort_3 \
> +    [multi_line \
> +	 "$decimal\t   $hex <main\\+$decimal>:\t\[^\\\r\\\n\]*" \
> +	 "$decimal\t   $hex <test\\+$decimal>:\tmov\[^\\\r\\\n\]*" \
> +	 "$decimal\t   $hex <test\\+$decimal>:\tret\[^\\\r\\\n\]*"]
>  
>  set test "speculation indication"
>  gdb_test_multiple "record instruction-history" $test {
> @@ -68,6 +73,9 @@ gdb_test_multiple "record instruction-history" $test {
>      -re "$abort_2.*$gdb_prompt $" {
>          pass $test
>      }
> +    -re -wrap "$abort_3.*" {
> +        pass $gdb_test_name
> +    }
>      -re  "$begin_to_end.*$gdb_prompt $" {
>          pass $test
>      }

We allow (and require) a single instruction in main.  That works if we stopped
directly at the call.  I don't think we can guarantee that.

In the other patterns, I put .* in front to ignore any compiler-generated
code prior to the actual test.

Regards,
Markus.
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