+ unsigned call_no = writer.beginEnter(call->sig, call->thread_id);
+ if (call->backtrace != NULL) {
+ writer.beginBacktrace(call->backtrace->size());
+ for (unsigned i = 0; i < call->backtrace->size(); ++i) {
+ writer.writeStackFrame((*call->backtrace)[i]);
+ }
+ writer.endBacktrace();
+ }