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authorRonald S. Bultje <rsbultje@gmail.com>2017-04-06 13:58:59 -0400
committerMichael Niedermayer <michael@niedermayer.cc>2017-04-13 02:29:26 +0200
commit1968a1eef1cae22e162259d7082c2eea98d81e32 (patch)
tree0a470f8f550764b0df0044c091a5162f7850b391 /libavcodec/ljpegenc.c
parentf4f3bf3c94a9aa485c09d0c03d68ca79a4785866 (diff)
downloadffmpeg-n3.3.tar.gz
pthread_frame: make accesses to debug field be protected by owner lock.n3.3
The av_log() is done outside the lock, but this way the accesses to the field (reads and writes) are always protected by a mutex. The av_log() is not run inside the lock context because it may involve user callbacks and doing that in performance-sensitive code is probably not a good idea. This should fix occasional tsan warnings when running fate-h264, like: WARNING: ThreadSanitizer: data race (pid=10916) Write of size 4 at 0x7d64000174fc by main thread (mutexes: write M2313): #0 update_context_from_user src/libavcodec/pthread_frame.c:335 (ffmpeg+0x000000df7b06) [..] Previous read of size 4 at 0x7d64000174fc by thread T1 (mutexes: write M2311): #0 ff_thread_await_progress src/libavcodec/pthread_frame.c:592 (ffmpeg+0x000000df8b3e) (cherry picked from commit 2e664b9c1e73c80aab91070c1eb7676f04bdd12d) Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/ljpegenc.c')
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