tmp_info         4019 gc/os_dep.c      void * tmp_info[NFRAMES + 1];
tmp_info         4034 gc/os_dep.c      npcs = backtrace((void **)tmp_info, NFRAMES + IGNORE_FRAMES);
tmp_info         4035 gc/os_dep.c      BCOPY(tmp_info+IGNORE_FRAMES, info, (npcs - IGNORE_FRAMES) * sizeof(void *));