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pulsecore: thread-posix.c: remove unnecessary assignment

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pthread_create(&t->id, NULL, internal_thread_func, t) already
assigns the t->id parameter during the thread construction.
There shouldn't be need to redo this again.

If the system is configured with the thread sanitizer, with meson:
'meson -Db_sanitize=thread', it's apparent that the unnecessary
assignment only causes potential trouble:

08:06:11 MAKE_CHECK='1' /home/test/pulse/pulseaudio/build/src/tests/once-test
Running suite(s): Once
0%: Checks: 1, Failures: 0, Errors: 1
../src/tests/once-test.c:119:E:once:once_test:0: (after this point) Early exit with return value 66

WARNING: ThreadSanitizer: data race (pid=102975)
  Read of size 8 at 0x7b0c000012c0 by main thread:
    #0 pa_thread_join ../src/pulsecore/thread-posix.c:143 (libpulsecommon-13.99.so+0x8aca4)
    #1 once_test ../src/tests/once-test.c:105 (once-test+0x2b13)
    #2 srunner_run <null> (once-test+0x58e5)
    #3 __libc_start_main <null> (libc.so.6+0x270b2)

  Previous write of size 8 at 0x7b0c000012c0 by thread T61:
    #0 internal_thread_func ../src/pulsecore/thread-posix.c:76 (libpulsecommon-13.99.so+0x8a715)
    #1 <null> <null> (libtsan.so.0+0x2d1af)

  Location is heap block of size 40 at 0x7b0c000012c0 allocated by main thread:
    #0 calloc <null> (libtsan.so.0+0x305ca)
    #1 pa_xmalloc0 ../src/pulse/xmalloc.c:74 (libpulse.so.0+0x6355b)
    #2 _pa_xnew0_internal ../src/pulse/xmalloc.h:75 (libpulsecommon-13.99.so+0x8a267)
    #3 pa_thread_new ../src/pulsecore/thread-posix.c:92 (libpulsecommon-13.99.so+0x8a828)
    #4 once_test ../src/tests/once-test.c:102 (once-test+0x2a98)
    #5 srunner_run <null> (once-test+0x58e5)
    #6 __libc_start_main <null> (libc.so.6+0x270b2)

  Thread T61 'once' (tid=110679, finished) created by main thread at:
    #0 pthread_create <null> (libtsan.so.0+0x5ea99)
    #1 pa_thread_new ../src/pulsecore/thread-posix.c:97 (libpulsecommon-13.99.so+0x8a8aa)
    #2 once_test ../src/tests/once-test.c:102 (once-test+0x2a98)
    #3 srunner_run <null> (once-test+0x58e5)
    #4 __libc_start_main <null> (libc.so.6+0x270b2)

SUMMARY: ThreadSanitizer: data race ../src/pulsecore/thread-posix.c:143 in pa_thread_join

ThreadSanitizer: reported 1 warnings

Fix this warning by removing the unnecessary assignment.

Signed-off-by: Eero Nurkkala <eero.nurkkala@offcode.fi>
This commit is contained in:
Eero Nurkkala 2020-07-30 12:43:56 +03:00 • committed by Arun Raghavan
parent 9055f5baf3
commit c04bd94037
1 changed files with 0 additions and 2 deletions
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2
src/pulsecore/thread-posix.c
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@ -73,8 +73,6 @@ static void* internal_thread_func(void *userdata) {
pthread_setname_np(t->name); pthread_setname_np(t->name);
#endif #endif
t->id = pthread_self();
PA_STATIC_TLS_SET(current_thread, t); PA_STATIC_TLS_SET(current_thread, t);
pa_atomic_inc(&t->running); pa_atomic_inc(&t->running);