https://bugs.kde.org/show_bug.cgi?id=430321
Bug ID: 430321
Summary: drd/tests/bar_bad and drd/tests/bar_bad_xml are
non-deterministic
Product: valgrind
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: drd
Assignee: bvanass...@acm.org
Reporter: alex.kana...@gmail.com
Target Milestone: ---
When I run the tests under qemu they pass or fail non-deterministically. Note
the difference in "destroy a barrier that has waiting threads" section.
Run 1:
root@qemux86-64:/usr/lib/valgrind/ptest# valgrind --tool=drd --fair-sched=yes
./helgrind/tests/bar_bad
==31394== drd, a thread error detector
==31394== Copyright (C) 2006-2017, and GNU GPL'd, by Bart Van Assche.
==31394== Using Valgrind-3.16.1 and LibVEX; rerun with -h for copyright info
==31394== Command: ./helgrind/tests/bar_bad
==31394==
initialise a barrier with zero count
==31394== pthread_barrier_init: 'count' argument is zero: barrier 0x4852030
==31394== at 0x48262D2: pthread_barrier_init_intercept
(drd_pthread_intercepts.c:1302)
==31394== by 0x48262D2: pthread_barrier_init (drd_pthread_intercepts.c:1310)
==31394== by 0x401273: main (bar_bad.c:43)
==31394==
initialise a barrier twice
==31394== Barrier reinitialization: barrier 0x4852070
==31394== at 0x48262D2: pthread_barrier_init_intercept
(drd_pthread_intercepts.c:1302)
==31394== by 0x48262D2: pthread_barrier_init (drd_pthread_intercepts.c:1310)
==31394== by 0x4012CB: main (bar_bad.c:49)
==31394== barrier 0x4852070 was first observed at:
==31394== at 0x48262D2: pthread_barrier_init_intercept
(drd_pthread_intercepts.c:1302)
==31394== by 0x48262D2: pthread_barrier_init (drd_pthread_intercepts.c:1310)
==31394== by 0x4012B5: main (bar_bad.c:48)
==31394==
initialise a barrier which has threads waiting on it
==31394== Barrier reinitialization: barrier 0x48520b0
==31394== at 0x48262D2: pthread_barrier_init_intercept
(drd_pthread_intercepts.c:1302)
==31394== by 0x48262D2: pthread_barrier_init (drd_pthread_intercepts.c:1310)
==31394== by 0x401367: main (bar_bad.c:64)
==31394== barrier 0x48520b0 was first observed at:
==31394== at 0x48262D2: pthread_barrier_init_intercept
(drd_pthread_intercepts.c:1302)
==31394== by 0x48262D2: pthread_barrier_init (drd_pthread_intercepts.c:1310)
==31394== by 0x40130D: main (bar_bad.c:55)
==31394==
destroy a barrier that has waiting threads
==31394== Destruction of a barrier with active waiters: barrier 0x4852350
==31394== at 0x4826C71: pthread_barrier_destroy_intercept
(drd_pthread_intercepts.c:1323)
==31394== by 0x4826C71: pthread_barrier_destroy
(drd_pthread_intercepts.c:1328)
==31394== by 0x4013F9: main (bar_bad.c:82)
==31394== barrier 0x4852350 was first observed at:
==31394== at 0x48262D2: pthread_barrier_init_intercept
(drd_pthread_intercepts.c:1302)
==31394== by 0x48262D2: pthread_barrier_init (drd_pthread_intercepts.c:1310)
==31394== by 0x4013A9: main (bar_bad.c:70)
==31394==
destroy a barrier that was never initialised
==31394== Not a barrier
==31394== at 0x4826C71: pthread_barrier_destroy_intercept
(drd_pthread_intercepts.c:1323)
==31394== by 0x4826C71: pthread_barrier_destroy
(drd_pthread_intercepts.c:1328)
==31394== by 0x40148E: main (bar_bad.c:98)
==31394==
==31394==
==31394== For lists of detected and suppressed errors, rerun with: -s
==31394== ERROR SUMMARY: 6 errors from 5 contexts (suppressed: 138 from 15)
Run 2:
root@qemux86-64:/usr/lib/valgrind/ptest# valgrind --tool=drd --fair-sched=yes
./helgrind/tests/bar_bad
==31400== drd, a thread error detector
==31400== Copyright (C) 2006-2017, and GNU GPL'd, by Bart Van Assche.
==31400== Using Valgrind-3.16.1 and LibVEX; rerun with -h for copyright info
==31400== Command: ./helgrind/tests/bar_bad
==31400==
initialise a barrier with zero count
==31400== pthread_barrier_init: 'count' argument is zero: barrier 0x4852030
==31400== at 0x48262D2: pthread_barrier_init_intercept
(drd_pthread_intercepts.c:1302)
==31400== by 0x48262D2: pthread_barrier_init (drd_pthread_intercepts.c:1310)
==31400== by 0x401273: main (bar_bad.c:43)
==31400==
initialise a barrier twice
==31400== Barrier reinitialization: barrier 0x4852070
==31400== at 0x48262D2: pthread_barrier_init_intercept
(drd_pthread_intercepts.c:1302)
==31400== by 0x48262D2: pthread_barrier_init (drd_pthread_intercepts.c:1310)
==31400== by 0x4012CB: main (bar_bad.c:49)
==31400== barrier 0x4852070 was first observed at:
==31400== at 0x48262D2: pthread_barrier_init_intercept
(drd_pthread_intercepts.c:1302)
==31400== by 0x48262D2: pthread_barrier_init (drd_pthread_intercepts.c:1310)
==31400== by 0x4012B5: main (bar_bad.c:48)
==31400==
initialise a barrier which has threads waiting on it
==31400== Barrier reinitialization: barrier 0x48520b0
==31400== at 0x48262D2: pthread_barrier_init_intercept
(drd_pthread_intercepts.c:1302)
==31400== by 0x48262D2: pthread_barrier_init (drd_pthread_intercepts.c:1310)
==31400== by 0x401367: main (bar_bad.c:64)
==31400== barrier 0x48520b0 was first observed at:
==31400== at 0x48262D2: pthread_barrier_init_intercept
(drd_pthread_intercepts.c:1302)
==31400== by 0x48262D2: pthread_barrier_init (drd_pthread_intercepts.c:1310)
==31400== by 0x40130D: main (bar_bad.c:55)
==31400==
destroy a barrier that has waiting threads
destroy a barrier that was never initialised
==31400== Not a barrier
==31400== at 0x4826C71: pthread_barrier_destroy_intercept
(drd_pthread_intercepts.c:1323)
==31400== by 0x4826C71: pthread_barrier_destroy
(drd_pthread_intercepts.c:1328)
==31400== by 0x40148E: main (bar_bad.c:98)
==31400==
==31400==
==31400== For lists of detected and suppressed errors, rerun with: -s
==31400== ERROR SUMMARY: 4 errors from 4 contexts (suppressed: 138 from 15)
This is observed with valgrind 3.16.1 under qemu x86_64.
I believe this has been also previously reported in
https://bugs.kde.org/show_bug.cgi?id=358213 but seemingly never fixed properly.
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