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git/.tsan-suppressions

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ThreadSanitizer: add suppressions Add a file .tsan-suppressions and list two functions in it: want_color() and transfer_debug(). Both of these use the pattern static int foo = -1; if (foo < 0) foo = bar(); where bar always returns the same non-negative value. This can cause ThreadSanitizer to diagnose a race when foo is written from two threads. That is indeed a race, although it arguably doesn't matter in practice since it's always the same value that is written. Add NEEDSWORK-comments to the functions so that this problem is not forever swept way under the carpet. The suppressions-file is used by setting the environment variable TSAN_OPTIONS to, e.g., "suppressions=$(pwd)/.tsan-suppressions". Observe that relative paths such as ".tsan-suppressions" might not work. Signed-off-by: Martin Ågren <martin.agren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-08-21 19:43:48 +02:00
# Suppressions for ThreadSanitizer (tsan).
#
# This file is used by setting the environment variable TSAN_OPTIONS to, e.g.,
# "suppressions=$(pwd)/.tsan-suppressions". Observe that relative paths such as
# ".tsan-suppressions" might not work.
# A static variable is written to racily, but we always write the same value, so
# in practice it (hopefully!) doesn't matter.
race:^want_color$
race:^transfer_debug$
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