void c_RescheduleWaitHandle::exitContext(context_idx_t ctx_idx) {
assert(AsioSession::Get()->getContext(ctx_idx));
// stop before corrupting unioned data
if (isFinished()) {
return;
}
// not in a context being exited
assert(getContextIdx() <= ctx_idx);
if (getContextIdx() != ctx_idx) {
return;
}
if (UNLIKELY(getState() != STATE_SCHEDULED)) {
raise_fatal_error("Invariant violation: encountered unexpected state");
}
// move us to the parent context
setContextIdx(getContextIdx() - 1);
// reschedule if still in a context
if (isInContext()) {
scheduleInContext();
}
// recursively move all wait handles blocked by us
getParentChain().exitContext(ctx_idx);
}
void MemFile::unzip() {
assertx(m_len != -1);
assertx(!m_malloced);
assertx(m_cursor == 0);
int len = m_len;
char *data = gzdecode(m_data, len);
if (data == nullptr) {
raise_fatal_error((std::string("cannot unzip mem stream: ") +
getName()).c_str());
}
m_data = data;
m_malloced = true;
m_len = len;
}
String c_AsyncFunctionWaitHandle::getName() {
switch (getState()) {
case STATE_BLOCKED:
case STATE_READY:
case STATE_RUNNING: {
auto func = actRec()->func();
if (!actRec()->getThisOrClass() ||
func->cls()->attrs() & AttrNoOverride) {
auto name = func->fullName();
if (func->isClosureBody()) {
const char* p = strchr(name->data(), ':');
if (p) {
return
concat(String(name->data(), p + 1 - name->data(), CopyString),
s__closure_);
} else {
return s__closure_;
}
}
return String{const_cast<StringData*>(name)};
}
String funcName;
if (actRec()->func()->isClosureBody()) {
// Can we do better than this?
funcName = s__closure_;
} else {
funcName = const_cast<StringData*>(actRec()->func()->name());
}
String clsName;
if (actRec()->hasThis()) {
clsName = const_cast<StringData*>(actRec()->getThis()->
getVMClass()->name());
} else if (actRec()->hasClass()) {
clsName = const_cast<StringData*>(actRec()->getClass()->name());
} else {
return funcName;
}
return concat3(clsName, "::", funcName);
}
default:
raise_fatal_error(
"Invariant violation: encountered unexpected state");
}
}
String c_AsyncFunctionWaitHandle::getName() {
switch (getState()) {
case STATE_BLOCKED:
case STATE_READY:
case STATE_RUNNING: {
auto func = actRec()->func();
if (!func->cls() ||
func->cls()->attrs() & AttrNoOverride ||
actRec()->localsDecRefd()) {
auto name = func->fullName();
if (func->isClosureBody()) {
const char* p = strchr(name->data(), ':');
if (p) {
return
concat(String(name->data(), p + 1 - name->data(), CopyString),
s__closure_);
} else {
return s__closure_;
}
}
return String{const_cast<StringData*>(name)};
}
auto const cls = actRec()->hasThis() ?
actRec()->getThis()->getVMClass() :
actRec()->getClass();
if (cls == func->cls() && !func->isClosureBody()) {
return String{const_cast<StringData*>(func->fullName())};
}
StrNR funcName(func->isClosureBody() ? s__closure_.get() : func->name());
return concat3(cls->nameStr(), "::", funcName);
}
default:
raise_fatal_error(
"Invariant violation: encountered unexpected state");
}
}
static void create_miter_for_walk(folly::Optional<MArrayIter>& miter,
Variant& var) {
if (!var.is(KindOfObject)) {
miter.emplace(var.asRef()->m_data.pref);
return;
}
auto const odata = var.getObjectData();
if (odata->isCollection()) {
raise_error("Collection elements cannot be taken by reference");
}
bool isIterable;
Object iterable = odata->iterableObject(isIterable);
if (isIterable) {
raise_fatal_error("An iterator cannot be used with "
"foreach by reference");
}
Array properties = iterable->o_toIterArray(null_string,
ObjectData::CreateRefs);
miter.emplace(properties.detach());
}
bool MemFile::open(const String& filename, const String& mode) {
assertx(m_len == -1);
// mem files are read-only
const char* mode_str = mode.c_str();
if (strchr(mode_str, '+') || strchr(mode_str, 'a') || strchr(mode_str, 'w')) {
return false;
}
int len = INT_MIN;
bool compressed = false;
char *data =
StaticContentCache::TheFileCache->read(filename.c_str(), len, compressed);
// -1: PHP file; -2: directory
if (len != INT_MIN && len != -1 && len != -2) {
assertx(len >= 0);
if (compressed) {
assertx(RuntimeOption::EnableOnDemandUncompress);
data = gzdecode(data, len);
if (data == nullptr) {
raise_fatal_error("cannot unzip compressed data");
}
m_data = data;
m_malloced = true;
m_len = len;
return true;
}
setName(filename.toCppString());
m_data = data;
m_len = len;
return true;
}
if (len != INT_MIN) {
Logger::Error("Cannot open a PHP file or a directory as MemFile: %s",
filename.c_str());
}
return false;
}
bool MemFile::flush() {
raise_fatal_error((std::string("cannot flush a mem stream: ") +
getName()).c_str());
}
int64_t MemFile::writeImpl(const char* /*buffer*/, int64_t /*length*/) {
raise_fatal_error((std::string("cannot write a mem stream: ") +
getName()).c_str());
}
ArrayData* GlobalsArray::CopyStatic(const ArrayData*) {
raise_fatal_error("GlobalsArray::copyStatic "
"not implemented.");
}
ArrayData*
GlobalsArray::CopyWithStrongIterators(const ArrayData* ad) {
raise_fatal_error(
"Unimplemented ArrayData::copyWithStrongIterators");
}
const String& ResourceData::o_getClassNameHook() const {
raise_fatal_error("Resource did not provide a name");
}
ArrayData* APCLocalArray::CopyWithStrongIterators(const ArrayData*) {
raise_fatal_error(
"Unimplemented ArrayData::copyWithStrongIterators");
}
void AsioContext::runUntil(c_WaitableWaitHandle* wait_handle) {
assert(wait_handle);
assert(wait_handle->getContext() == this);
auto session = AsioSession::Get();
auto ete_queue = session->getExternalThreadEventQueue();
if (!session->hasAbruptInterruptException()) {
session->initAbruptInterruptException();
}
while (!wait_handle->isFinished()) {
// Run queue of ready async functions once.
if (!m_runnableQueue.empty()) {
auto wh = m_runnableQueue.back();
m_runnableQueue.pop_back();
if (wh->getState() != c_ResumableWaitHandle::STATE_READY) {
// may happen if wh was scheduled in multiple contexts
decRefObj(wh);
} else {
wh->resume();
}
continue;
}
if (!m_fastRunnableQueue.empty()) {
auto wh = m_fastRunnableQueue.back();
m_fastRunnableQueue.pop_back();
if (wh->getState() != c_ResumableWaitHandle::STATE_READY) {
// may happen if wh was scheduled in multiple contexts
decRefObj(wh);
} else {
wh->resume();
}
continue;
}
// Process all sleep handles that have completed their sleep.
if (session->processSleepEvents()) {
continue;
}
// Process all external thread events that have completed their operation.
// Queue may contain received unprocessed events from failed runUntil().
if (UNLIKELY(ete_queue->hasReceived()) || ete_queue->tryReceiveSome()) {
ete_queue->processAllReceived();
continue;
}
// Run default priority queue once.
if (runSingle(m_priorityQueueDefault)) {
continue;
}
// Wait for pending external thread events...
if (!m_externalThreadEvents.empty()) {
// ...but only until the next sleeper (from any context) finishes.
onIOWaitEnter(session);
// check if onIOWaitEnter callback unblocked any wait handles
if (LIKELY(m_runnableQueue.empty() &&
m_fastRunnableQueue.empty() &&
!m_externalThreadEvents.empty() &&
!ete_queue->hasReceived() &&
m_priorityQueueDefault.empty())) {
auto waketime = session->sleepWakeTime();
ete_queue->receiveSomeUntil(waketime);
}
onIOWaitExit(session, this);
if (ete_queue->hasReceived()) {
// Either we didn't have to wait, or we waited but no sleeper timed us
// out, so just handle the ETEs.
ete_queue->processAllReceived();
} else {
// No received events means the next-to-wake sleeper timed us out.
session->processSleepEvents();
}
continue;
}
// If we're here, then the only things left are sleepers. Wait for one to
// be ready (in any context).
if (!m_sleepEvents.empty()) {
onIOWaitEnter(session);
// check if onIOWaitEnter callback unblocked any wait handles
if (LIKELY(m_runnableQueue.empty() &&
m_fastRunnableQueue.empty() &&
m_externalThreadEvents.empty() &&
m_priorityQueueDefault.empty() &&
!m_sleepEvents.empty())) {
std::this_thread::sleep_until(session->sleepWakeTime());
}
onIOWaitExit(session, this);
session->processSleepEvents();
continue;
}
// Run no-pending-io priority queue once.
if (runSingle(m_priorityQueueNoPendingIO)) {
continue;
}
// What? The wait handle did not finish? We know it is part of the current
// context and since there is nothing else to run, it cannot be in RUNNING
// or READY/SCHEDULED state. So it must be BLOCKED on something. Apparently,
// the same logic can be used recursively on the something, so there is an
// infinite chain of blocked wait handles. But our memory is not infinite.
// What could it possibly mean? I think we are in a deep sh^H^Hcycle.
// But we can't, the cycles are detected and avoided at blockOn() time.
// So, looks like it's not cycle, but the word I started typing first.
assert(false);
raise_fatal_error(
"Invariant violation: queues are empty, but wait handle did not finish");
}
}
static ArrayData* ZSetStrThrow(ArrayData* ad, StringData* k, RefData* v) {
raise_fatal_error("Unimplemented ArrayData::ZSetStr");
}
static ArrayData* ZSetIntThrow(ArrayData* ad, int64_t k, RefData* v) {
raise_fatal_error("Unimplemented ArrayData::ZSetInt");
}
static ArrayData* ZAppendThrow(ArrayData* ad, RefData* v, int64_t* key_ptr) {
raise_fatal_error("Unimplemented ArrayData::ZAppend");
}