isis最短路径计算：如何添加一个顶点

(gdb) bt
#0  isis_spf_add_local (spftree=0x7ffff4272228, vtype=VTYPE_IPREACH_INTERNAL, id=0x7ffff4582a50, adj=0x0, cost=0, family=2) at isis_spf.c:461
#1  0x00007ffff42dba35 in isis_spf_preload_tent (spftree=0x7ffff4272228, area=0x7ffff4271ba8, level=2, family=2) at isis_spf.c:802
#2  0x00007ffff42dc38a in isis_run_spf (area=0x7ffff4271ba8, level=2, family=2) at isis_spf.c:1022
#3  0x00007ffff42dc7f4 in isis_run_spf_l2 (thread=0x7ffff4582cc0) at isis_spf.c:1131
#4  0x00007ffff42f201b in thread_call (thread=0x7ffff4582cc0) at thread.c:1177
#5  0x00007ffff42bca3d in main (argc=5, argv=0x65c920, envp=0x63b760) at isis_main.c:353
#6  0x00007ffff7a0708f in ns3::DceManager::DoStartProcess (context=0x66f970) at ../model/dce-manager.cc:283
#7  0x00007ffff7a907fc in ns3::TaskManager::Trampoline (context=0x65c2c0) at ../model/task-manager.cc:274
#8  0x00007ffff7a8c7d7 in ns3::PthreadFiberManager::Run (arg=0x66fc60) at ../model/pthread-fiber-manager.cc:402
#9  0x000000318b2079d1 in start_thread () from /lib64/libpthread.so.0
#10 0x000000318a6e88fd in clone () from /lib64/libc.so.6
(gdb)