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de92fb0680
- Added framework for memory testing.
- Out of bound reads and writes can be
detected in both C and assembly.
- Added memory tests for DTRSM.
- Test methodology:
- Use linux's protected pages to set some memory
before and after the required buffer as protected.
- Set the first and last page_size bytes as
read, write and execute protected (red_zones).
- If any part of code tries to read/write
in redzones, a SIGSEGV signal will be
generated, which can be used to detect a
out of bounds read and write.
- Page protection can only be set per page.
If required size for buffer is not a multiple
of pagesize we have to allocate more memory
than required in order make sure the start and
end of redzones align with page boundaries.
- Overwrite malloc(size) to allocate
'buffer_size+(2*pagesize)' where buffer_size =
minimum size such that buffer_size > 'size' and
buffer_size is multiple of pagesize.
- Use first and last page_size bytes of allocated
buffer as redzones, use first 'size' of the middle
buffer as first greenzone and last 'size' bytes as
second greenzone.
- Call test code once with first geenzone and then
with second greenzone. Greenzones are surrounded
by redzones, if test code read/writes before or after
greenzones, it will be detected.
|_____________________________________________________|
| red_zone1 | green_zone1 greenzone_2 | red_zone2|
|_____________________________________________________|
AMD-Internal: [CPUPL-4403]
Change-Id: Ic5c22a9adf8f833c77510686eee886485e894354