# TSAN suppressions file for Tokio

# TSAN does not understand fences and `Arc::drop` is implemented using a fence.
# This causes many false positives.
race:Arc*drop
race:arc*Weak*drop

# `std` mpsc is not used in any Tokio code base. This race is triggered by some
# rust runtime logic.
race:std*mpsc_queue

# Probably more fences in std.
race:__call_tls_dtors

# The crossbeam deque uses fences.
race:crossbeam_deque

# This is excluded as this race shows up due to using the stealing features of
# the deque. Unfortunately, the implementation uses a fence, which makes tsan
# unhappy.
#
# TODO: It would be nice to not have to filter this out.
race:try_steal_task

# This filters out expected data race in the treiber stack implementations.
# Treiber stacks are inherently racy. The pop operation will attempt to access
# the "next" pointer on the node it is attempting to pop. However, at this
# point it has not gained ownership of the node and another thread might beat
# it and take ownership of the node first (touching the next pointer). The
# original pop operation will fail due to the ABA guard, but tsan still picks
# up the access on the next pointer.
race:Backup::next_sleeper
race:WorkerEntry::set_next_sleeper