trace_seq_used
if (trace_seq_used(s) <= s->readpos)
len = trace_seq_used(s) - s->readpos;
if (trace_seq_used(&iter->seq) >= cnt)
if (iter->seq.readpos >= trace_seq_used(&iter->seq))
count = trace_seq_used(&iter->seq) - save_len;
min((size_t)trace_seq_used(&iter->seq),
s->buffer, trace_seq_used(s));
s->buffer, trace_seq_used(s));
s->buffer, trace_seq_used(s));
s->buffer, trace_seq_used(s));
s->buffer, trace_seq_used(s));