nRF9160-DK, mfw 1.3.7, NCS 3.2.1
A UDP client (CoAP) exchanges data with "sendto( ... MSG_DONTWAIT)", "poll(...)" and "recvfrom(...). It was working with several NCS versions, including 2.6.4, 2.9.2 and 3.1.2.
But migrating to NCS 3.2.1 it seems to crash with an assert on the second call of sendto. I already enlarged the main stack, but without success.
Using the debugger shows the related callstack:
assert_post_action(const char * file, unsigned int line) (/home/achim/ncs/v3.2.1/zephyr/lib/os/assert.c:43)
z_swap_irqlock(unsigned int key) (/home/achim/ncs/v3.2.1/zephyr/kernel/include/kswap.h:210)
z_swap_irqlock(unsigned int key) (/home/achim/ncs/v3.2.1/zephyr/kernel/include/kswap.h:202)
z_impl_k_sem_take(struct k_sem * sem, k_timeout_t timeout) (/home/achim/ncs/v3.2.1/zephyr/kernel/sem.c:158)
k_sem_take(struct k_sem * sem) (/home/achim/ncs/v3.2.1/coaps-client/build_nrf9160dk_nrf9160_ns/coaps-client/zephyr/include/generated/zephyr/syscalls/kernel.h:1158)
nrf_modem_os_timedwait(uint32_t context, int32_t * timeout) (/home/achim/ncs/v3.2.1/nrf/lib/nrf_modem_lib/nrf_modem_os.c:201)
_req_forward (Unknown Source:0)
nrf_sendto (Unknown Source:0)
nrf9x_socket_offload_sendto(void * obj, const void * buf, size_t len, int flags, const struct sockaddr * to, socklen_t tolen) (/home/achim/ncs/v3.2.1/nrf/lib/nrf_modem_lib/nrf9x_sockets.c:702)
z_impl_zsock_sendto(int sock, const void * buf, size_t len, int flags, const struct sockaddr * dest_addr, socklen_t addrlen) (/home/achim/ncs/v3.2.1/zephyr/subsys/net/lib/sockets/sockets.c:342)
zsock_sendto(socklen_t addrlen, const struct sockaddr * dest_addr, int flags, size_t len, const void * buf, int sock) (/home/achim/ncs/v3.2.1/coaps-client/build_nrf9160dk_nrf9160_ns/coaps-client/zephyr/include/generated/zephyr/syscalls/socket.h:260)
send_to_peer(dtls_app_data_t * app, const uint8_t * data, size_t len) (/home/achim/ncs/v3.2.1/coaps-client/src/dtls_client.c:1194)
recvfrom_peer(dtls_app_data_t * app) (/home/achim/ncs/v3.2.1/coaps-client/src/dtls_client.c:1381)
dtls_loop(dtls_app_data_t * app, int reboot) (/home/achim/ncs/v3.2.1/coaps-client/src/dtls_client.c:2376)
main() (/home/achim/ncs/v3.2.1/coaps-client/src/dtls_client.c:3110)
The assert, which fires, is:
__ASSERT(arch_irq_unlocked(key) ||
_current->base.thread_state & (_THREAD_DUMMY | _THREAD_DEAD),
"Context switching while holding lock!");
I don't see, how the application code is able to cause that assert.
Any ideas?
