Hello all.
I have not been using valgrind (version 3.6.0) for a long time so please
bear with me. I would like to ask 2 questions regarding helgrind.
1) Suppose that there is a global array named 'global_array'. Image the
scenario where Thread1 does *global_array[0]*=value1 and Thread2 does *
global_array[1]*=value2 without any protection. Clearly, that scenario does
not cause any inconsistency problems. Is it possible that helgrind reports
that scenario as a "Possible race"?
2) I have a C++ boost-threaded application. Threads read and write shared
resources via GCC's atomic built-in operations, such as
__sync_compare_and_swap, __sync_fetch_and_add and so forth. I would like to
ask, whether or not helgrind is compatible with these kind of operations.
Should I trust the races reported? I am asking because the exact same
application was also written using pthreads for synchronization and helgrind
reported no races at all in that (POSIX) implementation...
Best Regards,
Panagiotis Foteinos
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