On 09/08/2022 23:35, vl01--- via Boost-users wrote:
Hello List,
I'm using the boost::interprocess::message_queue in a project and to
verify everything is working I created a test case. In that test case
I'm sending and receiving data via threads.
The test passes on Linux, Windows with no sanitizer and also with
AddressSanitizer and ThreadSanitizer. I recently added Apple Silicon
(M1) to the test matrix and now the test run with ThreadSanitizer
enabled fails.
Is boost::interprocess::message_queue thread-safe?
Can the reported TSan error be an false-positive?
If it that case, what test can I run to verify that?
I looked at code of atomic_cas32() and it uses the legacy built-in
__sync_val_compare_and_swap().
Can it be that that built-in isn't supported on ARM?
Is there a newer built-in which should be used?
It could be. Can you test if __atomic_compare_exchange avoids the TSAN
error?
inline boost::uint32_t atomic_cas32
( volatile boost::uint32_t *mem
, boost::uint32_t with, boost::uint32_t cmp)
{
__atomic_compare_exchange
(const_cast<boost::uint32_t*>(mem), &cmp, &with, false
,__ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
return cmp;
}
Best,
Ion
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