tree 67f61028a61fe58c4b7e49baacc38e4ab0adf5d2
parent c04a7178a3a50fe919964df59b041c5671db50f7
author Oliver Stannard <oliver.stannard@arm.com> 1582037752 +0000
committer Oliver Stannard <oliver.stannard@arm.com> 1582118715 +0000

Fix undefined behaviour in ldecod

The NUM_BLOCK_TYPES macro is defined to 10, but the arrays in
ctx_tables.h only have 8 elements in the relevant dimension, so this
was causing out of bounds array accesses, and segfaults if we were
(un)lucky. I don't know enough about H264 decoding to know if this is
the right fix, but it fixes the segfault currently affecting the Arm
LNT bot, and doesn't change the expected output.

Differential revision: https://reviews.llvm.org/D74770