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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PROTON-1574) WARNING: ThreadSanitizer: lock-order-inversion (potential deadlock) due to missing unlock in stop_polling()
Date Wed, 06 Sep 2017 22:09:00 GMT

    [ https://issues.apache.org/jira/browse/PROTON-1574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16156098#comment-16156098
] 

ASF subversion and git services commented on PROTON-1574:
---------------------------------------------------------

Commit eac4e3101a8e078e812e22b33b88b9b6219d8a5d in qpid-proton's branch refs/heads/master
from [~aconway]
[ https://git-wip-us.apache.org/repos/asf?p=qpid-proton.git;h=eac4e31 ]

PROTON-1574: Fix lock-order-inversion warnings

The lock introduced in

    17d2a6f4 PROTON-1568: c++ enable race detection for self-tests

created lock-order problems.

Using the lock as a simple memory barrier solves the original race and the
lock-order problem.


> WARNING: ThreadSanitizer: lock-order-inversion (potential deadlock) due to missing unlock
in stop_polling()
> -----------------------------------------------------------------------------------------------------------
>
>                 Key: PROTON-1574
>                 URL: https://issues.apache.org/jira/browse/PROTON-1574
>             Project: Qpid Proton
>          Issue Type: Bug
>          Components: proton-c
>    Affects Versions: proton-c-0.18.0
>            Reporter: Jiri Danek
>            Assignee: Alan Conway
>
> There is a lot of warnings about lock order on proton tests, that all result from a missing
unlock in {{stop_polling()}}.
> {code}
> diff --git a/proton-c/src/proactor/epoll.c b/proton-c/src/proactor/epoll.c 
> index 46effcc7..887327dc 100644 
> --- a/proton-c/src/proactor/epoll.c 
> +++ b/proton-c/src/proactor/epoll.c 
> @@ -296,8 +296,10 @@ static bool start_polling(epoll_extended_t *ee, int epollfd) { 
> static void stop_polling(epoll_extended_t *ee, int epollfd) { 
>   // TODO: check for error, return bool or just log? 
>   lock(&ee->mutex); 
> -  if (ee->fd == -1 || !ee->polling || epollfd == -1) 
> +  if (ee->fd == -1 || !ee->polling || epollfd == -1) { 
> +    unlock(&ee->mutex); 
>     return; 
> +  } 
>   struct epoll_event ev; 
>   ev.data.ptr = ee; 
>   ev.events = 0;
> {code}
> The warnings follow. TSan is enabled as described in PROTON-1540.
> {noformat}
> $ LD_PRELOAD=/path/to/gcc-7.1.0-lib/lib/libtsan.so TSAN_OPTIONS="color=always second_deadlock_stack=1"
ctest -VV
> [...]
> 21: Test command: /home/jdanek/Work/repos/qpid-proton/build/proton-c/src/tests/c-proactor-tests

> 21: Test timeout computed to be: 1500 
> 21: TEST: test_inactive(&t) 
> 21: TEST: test_interrupt_timeout(&t) 
> 21: TEST: test_errors(&t) 
> 21: TEST: test_client_server(&t) 
> 21: TEST: test_connection_wake(&t) 
> 21: ================== 
> 21: WARNING: ThreadSanitizer: lock-order-inversion (potential deadlock) (pid=687) 
> 21:   Cycle in lock order graph: M170 (0x7b70000014a0) => M173 (0x7b7000001558) =>
M170                                                                                     
                                                                                         
         
> 21:  
> 21:   Mutex M173 acquired here while holding mutex M170 in main thread: 
> 21:     #0 pthread_mutex_lock <null> (libtsan.so.0+0x0000000385df)            
                                                                                         
                                                                                         
             
> 21:     #1 lock /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:112
(libqpid-proton.so.11+0x000000044f10) 
> 21:     #2 start_polling /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:286
(libqpid-proton.so.11+0x000000044f10) 
> 21:     #3 start_polling /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1194
(libqpid-proton.so.11+0x00000004513e) 
> 21:     #4 pconnection_start /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1178
(libqpid-proton.so.11+0x00000004513e) 
> 21:     #5 pn_listener_accept /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1611
(libqpid-proton.so.11+0x000000048cf2) 
> 21:     #6 listen_handler /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:328
(c-proactor-tests+0x000000405720) 
> 21:     #7 test_proactors_get /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:167
(c-proactor-tests+0x000000407490) 
> 21:     #8 test_proactors_run /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:183
(c-proactor-tests+0x00000040bf84) 
> 21:     #9 test_connection_wake /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:397
(c-proactor-tests+0x00000040bf84) 
> 21:     #10 main /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:1066
(c-proactor-tests+0x000000404371) 
> 21:  
> 21:   Mutex M170 previously acquired by the same thread here: 
> 21:     #0 pthread_mutex_lock <null> (libtsan.so.0+0x0000000385df) 
> 21:     #1 lock /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:112
(libqpid-proton.so.11+0x000000048cd3) 
> 21:     #2 pn_listener_accept /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1608
(libqpid-proton.so.11+0x000000048cd3) 
> 21:     #3 listen_handler /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:328
(c-proactor-tests+0x000000405720) 
> 21:     #4 test_proactors_get /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:167
(c-proactor-tests+0x000000407490) 
> 21:     #5 test_proactors_run /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:183
(c-proactor-tests+0x00000040bf84) 
> 21:     #6 test_connection_wake /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:397
(c-proactor-tests+0x00000040bf84) 
> 21:     #7 main /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:1066
(c-proactor-tests+0x000000404371) 
> 21:  
> 21:   Mutex M170 acquired here while holding mutex M173 in main thread: 
> 21:     #0 pthread_mutex_lock <null> (libtsan.so.0+0x0000000385df)            
                                                                                         
                                                                                         
             
> 21:     #1 lock /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:112
(libqpid-proton.so.11+0x00000004681f) 
> 21:     #2 pconnection_cleanup /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:790
(libqpid-proton.so.11+0x00000004681f) 
> 21:     #3 pconnection_forced_shutdown /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:829
(libqpid-proton.so.11+0x0000000494d9) 
> 21:     #4 pn_proactor_free /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1684
(libqpid-proton.so.11+0x0000000494d9) 
> 21:     #5 test_proactor_destroy /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:130
(c-proactor-tests+0x00000040c07f) 
> 21:     #6 test_connection_wake /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:406
(c-proactor-tests+0x00000040c07f) 
> 21:     #7 main /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:1066
(c-proactor-tests+0x000000404371) 
> 21:  
> 21:   Mutex M173 previously acquired by the same thread here: 
> 21:     #0 pthread_mutex_lock <null> (libtsan.so.0+0x0000000385df) 
> 21:     #1 lock /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:112
(libqpid-proton.so.11+0x000000044dda) 
> 21:     #2 stop_polling /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:298
(libqpid-proton.so.11+0x000000044dda) 
> 21:     #3 pconnection_cleanup /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:788
(libqpid-proton.so.11+0x00000004680b) 
> 21:     #4 pconnection_forced_shutdown /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:829
(libqpid-proton.so.11+0x0000000494d9) 
> 21:     #5 pn_proactor_free /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1684
(libqpid-proton.so.11+0x0000000494d9) 
> 21:     #6 test_proactor_destroy /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:130
(c-proactor-tests+0x00000040c07f) 
> 21:     #7 test_connection_wake /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:406
(c-proactor-tests+0x00000040c07f) 
> 21:     #8 main /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:1066
(c-proactor-tests+0x000000404371) 
> 21:  
> 21: SUMMARY: ThreadSanitizer: lock-order-inversion (potential deadlock) (/nix/store/05ajcpmpia6imj82q7mqd8lvv1rc2hsm-gcc-7.1.0-lib/lib/libtsan.so.0+0x385df)
in __interceptor_pthread_mutex_lock 
> 21: ================== 
> 21: ================== 
> 21: WARNING: ThreadSanitizer: lock-order-inversion (potential deadlock) (pid=687) 
> 21:   Cycle in lock order graph: M150 (0x7b3400000010) => M151 (0x7b7400000010) =>
M150                                                                                     
                                                                                         
         
> 21:  
> 21:   Mutex M151 acquired here while holding mutex M150 in main thread: 
> 21:     #0 pthread_mutex_lock <null> (libtsan.so.0+0x0000000385df)            
                                                                                         
                                                                                         
             
> 21:     #1 lock /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:112
(libqpid-proton.so.11+0x000000044f10) 
> 21:     #2 start_polling /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:286
(libqpid-proton.so.11+0x000000044f10) 
> 21:     #3 start_polling /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1399
(libqpid-proton.so.11+0x000000048494) 
> 21:     #4 pn_proactor_listen /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1399
(libqpid-proton.so.11+0x000000048494) 
> 21:     #5 test_listen /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:219
(c-proactor-tests+0x000000408935) 
> 21:     #6 test_connection_wake /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:379
(c-proactor-tests+0x00000040bddd) 
> 21:     #7 main /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:1066
(c-proactor-tests+0x000000404371) 
> 21:  
> 21:   Mutex M150 previously acquired by the same thread here: 
> 21:     #0 pthread_mutex_lock <null> (libtsan.so.0+0x0000000385df) 
> 21:     #1 lock /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:112
(libqpid-proton.so.11+0x000000047fc6) 
> 21:     #2 pn_proactor_listen /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1360
(libqpid-proton.so.11+0x000000047fc6) 
> 21:     #3 test_listen /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:219
(c-proactor-tests+0x000000408935) 
> 21:     #4 test_connection_wake /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:379
(c-proactor-tests+0x00000040bddd) 
> 21:     #5 main /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:1066
(c-proactor-tests+0x000000404371) 
> 21:  
> 21:   Mutex M150 acquired here while holding mutex M151 in main thread: 
> 21:     #0 pthread_mutex_lock <null> (libtsan.so.0+0x0000000385df)            
                                                                                         
                                                                                         
             
> 21:     #1 lock /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:112
(libqpid-proton.so.11+0x000000048794) 
> 21:     #2 pn_listener_free /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1445
(libqpid-proton.so.11+0x000000048794) 
> 21:     #3 listener_forced_shutdown /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1489
(libqpid-proton.so.11+0x0000000493e9) 
> 21:     #4 pn_proactor_free /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1687
(libqpid-proton.so.11+0x0000000493e9) 
> 21:     #5 test_proactor_destroy /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:130
(c-proactor-tests+0x00000040c07f) 
> 21:     #6 test_connection_wake /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:406
(c-proactor-tests+0x00000040c07f) 
> 21:     #7 main /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:1066
(c-proactor-tests+0x000000404371) 
> 21:  
> 21:   Mutex M151 previously acquired by the same thread here: 
> 21:     #0 pthread_mutex_lock <null> (libtsan.so.0+0x0000000385df) 
> 21:     #1 lock /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:112
(libqpid-proton.so.11+0x000000044dda) 
> 21:     #2 stop_polling /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:298
(libqpid-proton.so.11+0x000000044dda) 
> 21:     #3 listener_begin_close /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1463
(libqpid-proton.so.11+0x00000004585b) 
> 21:     #4 listener_begin_close /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1457
(libqpid-proton.so.11+0x0000000493be) 
> 21:     #5 listener_forced_shutdown /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1484
(libqpid-proton.so.11+0x0000000493be) 
> 21:     #6 pn_proactor_free /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1687
(libqpid-proton.so.11+0x0000000493be) 
> 21:     #7 test_proactor_destroy /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:130
(c-proactor-tests+0x00000040c07f) 
> 21:     #8 test_connection_wake /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:406
(c-proactor-tests+0x00000040c07f) 
> 21:     #9 main /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:1066
(c-proactor-tests+0x000000404371) 
> 21:  
> 21: SUMMARY: ThreadSanitizer: lock-order-inversion (potential deadlock) (/nix/store/05ajcpmpia6imj82q7mqd8lvv1rc2hsm-gcc-7.1.0-lib/lib/libtsan.so.0+0x385df)
in __interceptor_pthread_mutex_lock 
> 21: ================== 
> 21: TEST: test_ipv4_ipv6(&t) 
> 21: TEST: test_release_free(&t) 
> 21: ================== 
> 21: WARNING: ThreadSanitizer: lock-order-inversion (potential deadlock) (pid=687) 
> 21:   Cycle in lock order graph: M304 (0x7b70000004a0) => M307 (0x7b7000000558) =>
M304                                                                                     
                                                                                         
         
> 21:  
> 21:   Mutex M307 acquired here while holding mutex M304 in main thread: 
> 21:     #0 pthread_mutex_lock <null> (libtsan.so.0+0x0000000385df)            
                                                                                         
                                                                                         
             
> 21:     #1 lock /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:112
(libqpid-proton.so.11+0x000000044f10) 
> 21:     #2 start_polling /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:286
(libqpid-proton.so.11+0x000000044f10) 
> 21:     #3 start_polling /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1194
(libqpid-proton.so.11+0x00000004513e) 
> 21:     #4 pconnection_start /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1178
(libqpid-proton.so.11+0x00000004513e) 
> 21:     #5 pconnection_maybe_connect_lh /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1208
(libqpid-proton.so.11+0x0000000460da) 
> 21:     #6 pn_proactor_connect /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1269
(libqpid-proton.so.11+0x000000047add) 
> 21:     #7 test_release_free /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:686
(c-proactor-tests+0x000000409ec4) 
> 21:     #8 main /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:1068
(c-proactor-tests+0x000000404475) 
> 21:  
> 21:   Mutex M304 previously acquired by the same thread here: 
> 21:     #0 pthread_mutex_lock <null> (libtsan.so.0+0x0000000385df) 
> 21:     #1 lock /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:112
(libqpid-proton.so.11+0x0000000478b5) 
> 21:     #2 pn_proactor_connect /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1257
(libqpid-proton.so.11+0x0000000478b5) 
> 21:     #3 test_release_free /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:686
(c-proactor-tests+0x000000409ec4) 
> 21:     #4 main /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:1068
(c-proactor-tests+0x000000404475) 
> 21:  
> 21:   Mutex M304 acquired here while holding mutex M307 in main thread: 
> 21:     #0 pthread_mutex_lock <null> (libtsan.so.0+0x0000000385df)            
                                                                                         
                                                                                         
             
> 21:     #1 lock /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:112
(libqpid-proton.so.11+0x00000004681f) 
> 21:     #2 pconnection_cleanup /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:790
(libqpid-proton.so.11+0x00000004681f) 
> 21:     #3 pconnection_forced_shutdown /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:829
(libqpid-proton.so.11+0x0000000494d9) 
> 21:     #4 pn_proactor_free /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1684
(libqpid-proton.so.11+0x0000000494d9) 
> 21:     #5 test_proactor_destroy /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:130
(c-proactor-tests+0x00000040a084) 
> 21:     #6 test_release_free /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:706
(c-proactor-tests+0x00000040a084) 
> 21:     #7 main /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:1068
(c-proactor-tests+0x000000404475) 
> 21:  
> 21:   Mutex M307 previously acquired by the same thread here: 
> 21:     #0 pthread_mutex_lock <null> (libtsan.so.0+0x0000000385df) 
> 21:     #1 lock /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:112
(libqpid-proton.so.11+0x000000044dda) 
> 21:     #2 stop_polling /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:298
(libqpid-proton.so.11+0x000000044dda) 
> 21:     #3 pconnection_cleanup /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:788
(libqpid-proton.so.11+0x00000004680b) 
> 21:     #4 pconnection_forced_shutdown /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:829
(libqpid-proton.so.11+0x0000000494d9) 
> 21:     #5 pn_proactor_free /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1684
(libqpid-proton.so.11+0x0000000494d9) 
> 21:     #6 test_proactor_destroy /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:130
(c-proactor-tests+0x00000040a084) 
> 21:     #7 test_release_free /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:706
(c-proactor-tests+0x00000040a084) 
> 21:     #8 main /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:1068
(c-proactor-tests+0x000000404475) 
> 21:  
> 21: SUMMARY: ThreadSanitizer: lock-order-inversion (potential deadlock) (/nix/store/05ajcpmpia6imj82q7mqd8lvv1rc2hsm-gcc-7.1.0-lib/lib/libtsan.so.0+0x385df)
in __interceptor_pthread_mutex_lock 
> 21: ================== 
> 21: ================== 
> 21: WARNING: ThreadSanitizer: lock-order-inversion (potential deadlock) (pid=687) 
> 21:   Cycle in lock order graph: M310 (0x7b70000014a0) => M313 (0x7b7000001558) =>
M310                                                                                     
                                                                                         
         
> 21:  
> 21:   Mutex M313 acquired here while holding mutex M310 in main thread: 
> 21:     #0 pthread_mutex_lock <null> (libtsan.so.0+0x0000000385df)            
                                                                                         
                                                                                         
             
> 21:     #1 lock /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:112
(libqpid-proton.so.11+0x000000044f10) 
> 21:     #2 start_polling /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:286
(libqpid-proton.so.11+0x000000044f10) 
> 21:     #3 start_polling /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1194
(libqpid-proton.so.11+0x00000004513e) 
> 21:     #4 pconnection_start /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1178
(libqpid-proton.so.11+0x00000004513e) 
> 21:     #5 pn_listener_accept /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1611
(libqpid-proton.so.11+0x000000048cf2) 
> 21:     #6 listen_handler /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:328
(c-proactor-tests+0x000000405720) 
> 21:     #7 test_proactors_get /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:167
(c-proactor-tests+0x000000407490) 
> 21:     #8 test_proactors_run /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:183
(c-proactor-tests+0x000000409ed4) 
> 21:     #9 test_release_free /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:687
(c-proactor-tests+0x000000409ed4) 
> 21:     #10 main /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:1068
(c-proactor-tests+0x000000404475) 
> 21:  
> 21:   Mutex M310 previously acquired by the same thread here: 
> 21:     #0 pthread_mutex_lock <null> (libtsan.so.0+0x0000000385df) 
> 21:     #1 lock /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:112
(libqpid-proton.so.11+0x000000048cd3) 
> 21:     #2 pn_listener_accept /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1608
(libqpid-proton.so.11+0x000000048cd3) 
> 21:     #3 listen_handler /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:328
(c-proactor-tests+0x000000405720) 
> 21:     #4 test_proactors_get /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:167
(c-proactor-tests+0x000000407490) 
> 21:     #5 test_proactors_run /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:183
(c-proactor-tests+0x000000409ed4) 
> 21:     #6 test_release_free /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:687
(c-proactor-tests+0x000000409ed4) 
> 21:     #7 main /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:1068
(c-proactor-tests+0x000000404475) 
> 21:  
> 21:   Mutex M310 acquired here while holding mutex M313 in main thread: 
> 21:     #0 pthread_mutex_lock <null> (libtsan.so.0+0x0000000385df)            
                                                                                         
                                                                                         
             
> 21:     #1 lock /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:112
(libqpid-proton.so.11+0x00000004681f) 
> 21:     #2 pconnection_cleanup /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:790
(libqpid-proton.so.11+0x00000004681f) 
> 21:     #3 pconnection_forced_shutdown /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:829
(libqpid-proton.so.11+0x0000000494d9) 
> 21:     #4 pn_proactor_free /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1684
(libqpid-proton.so.11+0x0000000494d9) 
> 21:     #5 test_proactor_destroy /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:130
(c-proactor-tests+0x00000040a099) 
> 21:     #6 test_release_free /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:706
(c-proactor-tests+0x00000040a099) 
> 21:     #7 main /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:1068
(c-proactor-tests+0x000000404475) 
> 21:  
> 21:   Mutex M313 previously acquired by the same thread here: 
> 21:     #0 pthread_mutex_lock <null> (libtsan.so.0+0x0000000385df) 
> 21:     #1 lock /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:112
(libqpid-proton.so.11+0x000000044dda) 
> 21:     #2 stop_polling /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:298
(libqpid-proton.so.11+0x000000044dda) 
> 21:     #3 pconnection_cleanup /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:788
(libqpid-proton.so.11+0x00000004680b) 
> 21:     #4 pconnection_forced_shutdown /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:829
(libqpid-proton.so.11+0x0000000494d9) 
> 21:     #5 pn_proactor_free /home/jdanek/Work/repos/qpid-proton/proton-c/src/proactor/epoll.c:1684
(libqpid-proton.so.11+0x0000000494d9) 
> 21:     #6 test_proactor_destroy /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:130
(c-proactor-tests+0x00000040a099) 
> 21:     #7 test_release_free /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:706
(c-proactor-tests+0x00000040a099) 
> 21:     #8 main /home/jdanek/Work/repos/qpid-proton/proton-c/src/tests/proactor.c:1068
(c-proactor-tests+0x000000404475) 
> 21:  
> 21: SUMMA
> [...]
> {noformat}



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