Re: [PATCH v3] perf bench: fix assert when NDEBUG is defined

From: Pekka Enberg
Date: Sat Sep 08 2012 - 04:19:53 EST

On Sat, Sep 8, 2012 at 8:35 AM, Irina Tirdea <irina.tirdea@xxxxxxxxx> wrote:
> From: Irina Tirdea <irina.tirdea@xxxxxxxxx>
> When NDEBUG is defined, the assert macro will be expanded to nothing.
> Some assert calls used in perf are also including some functionality
> (e.g. system calls), not only validity checks. Therefore, if NDEBUG is
> defined, this functionality will be removed along with the assert.
> Perf also defines BUG_ON based on assert, so it has the same problem.
> Define BUG_ON so that the condition will be executed when NDEBUG is defined.
> Replace the assert statements that have these side effects with BUG_ON.
> For defining BUG_ON, use "if (cond) {}" insted of "if (cond) ;" because in
> the latter case build fails with "error: suggest braces around empty body in
> an ‘if’ statement [-Werror=empty-body]"
> Suggested-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
> Signed-off-by: Irina Tirdea <irina.tirdea@xxxxxxxxx>

Reviewed-by: Pekka Enberg <penberg@xxxxxxxxxx>
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