// Form a trace of the async stack starting with the currently running
// generator, if any. For now we just toss in the function name and
// id, as well as the pseudo-frames for context breaks at explicit
// joins. Later we'll add more, like file and line, hopefully function
// args, wait handle status, etc.
static Array createAsyncStacktrace() {
Array trace;
auto currentWaitHandle = HHVM_FN(asio_get_running)();
if (currentWaitHandle.isNull()) return trace;
Array depStack =
objToWaitableWaitHandle(currentWaitHandle)->t_getdependencystack();
for (ArrayIter iter(depStack); iter; ++iter) {
if (iter.secondRef().isNull()) {
trace.append(Array(staticEmptyArray()));
} else {
auto wh = objToWaitableWaitHandle(iter.secondRef().toObject());
auto parents = wh->t_getparents();
Array ancestors;
for (ArrayIter piter(parents); piter; ++piter) {
// Note: the parent list contains no nulls.
auto parent = objToWaitableWaitHandle(piter.secondRef().toObject());
ancestors.append(parent->t_getname());
}
Array frameData;
frameData.set(s_function, wh->t_getname(), true);
frameData.set(s_id, wh->t_getid(), true);
frameData.set(s_ancestors, ancestors, true);
// Async function wait handles may have a source location to add.
if (wh->getKind() == c_WaitHandle::Kind::AsyncFunction) {
auto afwh = static_cast<c_AsyncFunctionWaitHandle*>(wh);
addAsyncFunctionLocation(frameData, *afwh);
}
trace.append(frameData);
}
}
return trace;
}
// Form a trace of the async stack starting with the currently running
// generator, if any. For now we just toss in the function name and
// id, as well as the pseudo-frames for context breaks at explicit
// joins. Later we'll add more, like file and line, hopefully function
// args, wait handle status, etc.
Array createAsyncStacktrace() {
Array trace;
auto currentWaitHandle = f_asio_get_running();
if (currentWaitHandle.isNull()) return trace;
Array depStack =
objToWaitableWaitHandle(currentWaitHandle)->t_getdependencystack();
for (ArrayIter iter(depStack); iter; ++iter) {
if (iter.secondRef().isNull()) {
trace.append(ArrayInit(0).toVariant());
} else {
auto wh = objToWaitableWaitHandle(iter.secondRef().toObject());
auto parents = wh->t_getparents();
Array ancestors;
for (ArrayIter piter(parents); piter; ++piter) {
// Note: the parent list contains no nulls.
auto parent = objToWaitableWaitHandle(piter.secondRef().toObject());
ancestors.append(parent->t_getname());
}
Array frameData;
frameData.set(s_function, wh->t_getname(), true);
frameData.set(s_id, wh->t_getid(), true);
frameData.set(s_ancestors, ancestors, true);
// Continuation wait handles may have a source location to add.
auto contWh = dynamic_cast<c_AsyncFunctionWaitHandle*>(wh);
if (contWh != nullptr) addContinuationLocation(frameData, *contWh);
trace.append(frameData);
}
}
return trace;
}
Array XenonRequestLocalData::logAsyncStack() {
VMRegAnchor _;
Array bt;
auto currentWaitHandle = c_ResumableWaitHandle::getRunning(vmfp());
if (currentWaitHandle == nullptr) {
// if we have a nullptr, then we have no async stack to store for this log
return bt;
}
Array depStack = currentWaitHandle->t_getdependencystack();
for (ArrayIter iter(depStack); iter; ++iter) {
Array frameData;
if (iter.secondRef().isNull()) {
frameData.set(s_function, "<prep>", true);
} else {
auto wh = objToWaitableWaitHandle(iter.secondRef().toObject());
frameData.set(s_function, wh->t_getname(), true);
// Async function wait handles may have a source location to add.
if (wh->getKind() == c_WaitHandle::Kind::AsyncFunction) {
auto afwh = static_cast<c_AsyncFunctionWaitHandle*>(wh);
if (!afwh->isRunning()) {
frameData.set(s_file, afwh->getFileName(), true);
frameData.set(s_line, afwh->getLineNumber(), true);
}
}
}
bt.append(frameData);
}
return bt;
}
static
c_AsyncFunctionWaitHandle *getWaitHandleAtAsyncStackPosition(int position) {
auto top = f_asio_get_running();
if (top.isNull()) {
return nullptr;
}
if (position == 0) {
return objToContinuationWaitHandle(top);
}
Array depStack =
objToWaitableWaitHandle(top)->t_getdependencystack();
return objToContinuationWaitHandle(depStack[position].toObject());
}