Add TSan suppression for exception_ptr (#21084)

mpoeter · web-flow · commit 3100cf6fae78 · 2024-06-20T18:56:12.000+02:00
The reference counting of exception_ptr is part of the prebuilt glibc and is
therefore not instrumented by TSan, so TSan is not aware of the synchronization
that happens there. That means we have to ignore all races in destructors of
exceptions as a result of a __exception_ptr release that causes the refcnt to
drop to zero.
diff --git a/tsan_arangodb_suppressions.txt b/tsan_arangodb_suppressions.txt
@@ -45,6 +45,13 @@ race:VersionSet::SetLastSequence
 deadlock:replication2::replicated_log::LogLeader::triggerAsyncReplication
 deadlock:replication2::replicated_state::ReplicatedStateManager
 
+# the reference counting of exception_ptr is part of the prebuilt glibc and is
+# therefore not instrumented by TSan, so TSan is not aware of the synchronization
+# that happens there. That means we have to ignore all races in destructors of
+# exceptions as a result of a __exception_ptr release that causes the refcnt to
+# drop to zero.
+race:std::__exception_ptr
+
 # TODO - this should be removed once BTS-685 is fixed
 race:AllowImplicitCollectionsSwitcher
 race:graph::RefactoredTraverserCache::appendVertex
