Re: [PATCH v1 03/15] perf, tools, stat: Fix saved values rbtree lookup

From: Jiri Olsa
Date: Wed Aug 02 2017 - 03:35:22 EST

On Mon, Jul 24, 2017 at 04:40:03PM -0700, Andi Kleen wrote:
> From: Andi Kleen <ak@xxxxxxxxxxxxxxx>
> The stat shadow saved values rbtree is indexed by a pointer.
> Fix the comparison function:
> - We cannot return a pointer delta as an int because
> that loses bits on 64bit.
> - Doing pointer arithmetic on the struct pointer
> only works if the objects are spaced by the multiple
> of the object size, which is not guaranteed for individual
> malloc'ed object
> Replace it with a proper comparison.
> This fixes various problems with values not being found.
> Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>

Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>