fix crash if pthread_mutex_unlock is called without ever locking

this is valid for error-checking mutexes; otherwise it invokes UB and
would be justified in crashing.

diff --git a/src/thread/pthread_mutex_unlock.c b/src/thread/pthread_mutex_unlock.c
index 05baec1..6950872 100644 (file)
--- a/src/thread/pthread_mutex_unlock.c
+++ b/src/thread/pthread_mutex_unlock.c
@@ -9,7 +9,7 @@ int pthread_mutex_unlock(pthread_mutex_t *m)
        if (m->_m_type != PTHREAD_MUTEX_NORMAL) {
                if (!m->_m_lock)
                        return EPERM;
-               self = __pthread_self();
+               self = pthread_self();
                if ((m->_m_lock&0x1fffffff) != self->tid)
                        return EPERM;
                if ((m->_m_type&3) == PTHREAD_MUTEX_RECURSIVE && m->_m_count)