[igt-dev] [PATH i-g-t 2/2] core: Show backtrace from igt_skip_on_simulation

[Daniel Vetter]

On Wed, Sep 12, 2018 at 10:33:06AM +0100, Tvrtko Ursulin wrote:
> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> 
> igt_skip_on_simulation is called both directly from tests but also from
> library helpers. In the latter case especially the logged caller name is
> useless since it is always the helper itself. What we instead want to know
> is who is the caller.
> 
> Trivial approach would be to move the helper to a header as static inline,
> but due the longjmp in it it can never be inlined. Alternative option is
> to print a backtrace from it.
> 
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> Cc: Radoslaw Szwichtenberg <radoslaw.szwichtenberg at intel.com>
> ---
>  lib/igt_core.c | 20 ++++++++++++++++----
>  1 file changed, 16 insertions(+), 4 deletions(-)
> 
> diff --git a/lib/igt_core.c b/lib/igt_core.c
> index 23bb858fd886..990abc5a36b3 100644
> --- a/lib/igt_core.c
> +++ b/lib/igt_core.c
> @@ -2065,14 +2065,26 @@ bool igt_run_in_simulation(void)
>   */
>  void igt_skip_on_simulation(void)
>  {
> +	bool in_simulation;
> +
>  	if (igt_only_list_subtests())
>  		return;
>  
> +	in_simulation = igt_run_in_simulation();
> +
>  	if (!igt_can_fail()) {
> -		igt_fixture
> -			igt_require(!igt_run_in_simulation());
> -	} else
> -		igt_require(!igt_run_in_simulation());
> +		igt_fixture {
> +			if (in_simulation) {
> +				print_backtrace();
> +				igt_require(!in_simulation);
> +			}
> +		}
> +	} else {
> +		if (in_simulation) {
> +			print_backtrace();
> +			igt_require(!in_simulation);

Hm, why don't we go right ahead and push this into igt_skip()? There's a
pile of other igt_require, and we tend to push a lot of these into the
library. So they have all the same problem.
-Daniel

> +		}
> +	}
>  }
>  
>  /* structured logging */
> -- 
> 2.17.1
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch