Method stack_trace

src/bthread/task_control.cpp:396–398

#ifdef BRPC_BTHREAD_TRACER
void TaskControl::stack_trace(std::ostream& os, bthread_t tid) {
    _task_tracer.Trace(os, tid);
}

std::string TaskControl::stack_trace(bthread_t tid) {
    return _task_tracer.Trace(tid);