Hello,
I got a deadlock while running through gdbserver, this is an implementation of
a synchronized queue,
Fup side waits via condition variable, main wants to push data, but main fails
to acquire the mutex.
The mutex is an errorchecking type, without priority inheritance, and not used
elsewhere.
The task are as following:
CPU PID CLASS TYPE PRI TIMEOUT STAT NAME
1 1686 rt cobalt 4 - Wt main
3 1690 rt cobalt 2 - Wt fup.medium
main is stuck in this function
int mutex_lock(struct mutex_data *pData)
{
pthread_t threadId = pthread_self();
// assert(pthread_equal(threadId, pData->m_LockId) == 0);
-> int r = pthread_mutex_lock(&pData->m_Mutex);
assert(r == 0);
pData->m_LockId = threadId;
return r;
}
In libcobalt:
do
ret = XENOMAI_SYSCALL1(sc_cobalt_mutex_lock, _mutex);
while (ret == -EINTR);
fup.medium is stuck in:
int conditionvar_wait(struct conditionvar_data *pData, struct mutex_data
*pMutex)
{
pthread_t sid = pthread_self();
assert(pthread_equal(sid, pMutex->m_LockId) != 0);
pMutex->m_LockId = 0;
-> int r = pthread_cond_wait(&pData->m_CondVar, &pMutex->m_Mutex);
assert(r == 0);
pMutex->m_LockId = sid;
return r;
}
In libcobalt:
while (err == -EINTR)
err = XENOMAI_SYSCALL2(sc_cobalt_cond_wait_epilogue, _cnd, _mx);
Mit besten Grüßen / Kind regards
NORBERT LANGE
AT-RD3
ANDRITZ HYDRO GmbH
Eibesbrunnergasse 20
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p: +43 50805 56684
norbert.la...@andritz.com<mailto:norbert.la...@andritz.com>
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