tprof_buf
static STAILQ_HEAD(, tprof_buf) tprof_list; /* L: global buffer list */
STAILQ_ENTRY(tprof_buf) b_list;
tprof_buf = emalloc(tprof_bufsize);
len = read(devfd, tprof_buf, tprof_bufsize);
(tprof_sample_t *)tprof_buf;
(tprof_sample_t *)(tprof_buf + len))
char *tprof_buf, *p, *errmsg;