Adds a new debug tool to pad each GEM BO allocated with (weak)
pseudo-random noise values which are then checked after each
batchbuffer dispatch to the kernel. This can be quite valuable to
find diffucult to track down heisenberg style bugs.
[scott.d.phillips@intel.com: split to separate tool]
v2: (by Scott D Phillips)
- track gem handles per fd (Kevin)
- remove handles on GEM_CLOSE (Kevin)
- ignore prime handles
- meson & shell script
v3: (by Scott D Phillips)
- don't track prime bos at all (Kevin)
- protect the hash table with a mutex (Kevin)
- hook fds by drm_version.name, not path (Chris Wilson)
Reviewed-by: Scott D Phillips <scott.d.phillips@intel.com>
Reviewed-by: Kevin Rogovin <kevin.rogovin@intel.com>
Reviewed-by: Dylan Baker <dylan@pnwbakers.com>
