When TSAN is enabled we use standard mutexes instead of futexes. With
futexes the fence->signalled is read using an atomic operation, to best
mimic this let's protect the read with a locked mutex.
This avoids TSAN reporting a race condition (false positive with
futexes) with Zink when accessing the pipeline cache.
Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28650>
Check whether the compiler actually supports it and if
not than warn about it. Note that meson will also
suggest that one should use the build-in flag, but this
is just sloppy testing for -fsanitize, -fsanitize-blacklist
is actually not available as build-in option.
v2: define THREAD_SANITIZER to 1 or 0 (suggested by Yonggang Luo)
v3: Update comment about meson warning (Dylan Baker)
Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28650>
