[Current thread is 1 (Thread 0x7fd9d0920700 (LWP 254915))]
(gdb) where
#0  0x00000000000014a1 in ?? ()
#1  0x0000000000a1ba4c in gnb::threads::kill_all_threads (this=0x2c35360)
    at /home/xzb/175/nr_hl_cu/cu/nr_hl_cu/app/build/../include/app_threads.h:591
#2  0x0000000000a10e94 in gnb::app_cntrl::deinit (this=<optimized out>)
    at /home/xzb/175/nr_hl_cu/cu/nr_hl_cu/app/build/../src/app_cntrl.cpp:143
#3  0x0000000000a13fbc in gnb::app_cntrl::exception_handler::on_sigterm (
    signal=<optimized out>)
    at /home/xzb/175/nr_hl_cu/cu/nr_hl_cu/app/build/../../include/app_cntrl.h:216
#4  <signal handler called>
#5  __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#6  0x00007fda0ab85a7d in pthread_cond_signal@@GLIBC_2.3.2 ()
    at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S:140
#7  0x00000000009d2af6 in ngp::message_queue<ngp::message>::add_to_queue_tail (
    item=<optimized out>, this=<optimized out>)
    at /home/xzb/175/nr_hl_cu/cu/nr_hl_cu/app/build/../../../../ngp/include/ngp_message_queue.h:237
#8  gnb::threads::send_msg_to_ul_thread (this=<optimized out>, 
    ul_thread_inst_id=<optimized out>, msg=msg@entry=0x7fd9b409b0c0, 
    is_head=is_head@entry=false)
    at /home/xzb/175/nr_hl_cu/cu/nr_hl_cu/app/build/../include/app_threads.h:990
#9  0x0000000000a311d3 in gnb::udp_rx_msg_comm::send_udp_data_rx_ind (
    this=this@entry=0x7fd9d091d9a0, 
    udp_data_rx_ind=udp_data_rx_ind@entry=0x7fd9b65d9818)
    at /home/xzb/175/nr_hl_cu/cu/nr_hl_cu/app/build/../src/udp_rx_msg_comm.cpp:78
#10 0x0000000000c8e7fb in gnb::udp_rx_ul::on_message_received (
    this=0x7fd9b4000950, msg=<optimized out>, from_ip_address=<optimized out>, 
    from_port=<optimized out>)
    at /home/xzb/175/nr_hl_cu/cu/nr_hl_cu/udp/build/../src/udp_rx_ul.cpp:88
#11 0x0000000000c9699f in ngp::udp_connection::run (this=0x7fd9b4000950)
    at /home/xzb/175/nr_hl_cu/ngp/comm/build/../src/ngp_udp.cpp:170
#12 0x0000000000ca46a7 in ngp::thread_entry_function (param=0x2d8a3d0)
    at /home/xzb/175/nr_hl_cu/ngp/thread/build/../src/ngp_sys_thread.cpp:110
#13 ngp::thread_start (param=0x2d8a3d0)
    at /home/xzb/175/nr_hl_cu/ngp/thread/build/../src/ngp_sys_thread.cpp:123
#14 0x00007fda0ab7f6ba in start_thread (arg=0x7fd9d0920700) at pthread_create.c:333
#15 0x00007fda0a8b541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
(gdb)