[Tarantool-patches] [PATH luajit] GC64: fix 64-bit constant fusion
imun at tarantool.org
Thu Jun 30 15:10:59 MSK 2022
I've checked the patch into all long-term branches in tarantool/luajit
and bumped a new version in master, 2.10 and 1.10.
On 28.05.21, Sergey Ostanevich wrote:
> Author: Mike Pall <mike>
> Date: Mon Aug 28 10:43:37 2017 +0200
> x64/LJ_GC64: Fix fallback case of asm_fuseloadk64().
> Contributed by Peter Cawley.
> (cherry picked from commit 6b0824852677cc12570c20a3211fbfe0e4f0ce14)
> Code generation under LJ_GC64 missed an update to the mcode area after
> a 64bit constant encoding. This lead to a corruption to the constant
> later on.
> The problem is rather rare, since there should be big enough (4GiB)
> distance from the currently allocated mcode to the dispatch pointer.
> This lead to a number of flaky tests, trackers are addressed.
> Sergey Ostanevich:
> * added the description and the test for the problem
> Closes: #4095, #4199, #4614
> Signed-off-by: Sergey Ostanevich <sergos at tarantool.org>
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