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3 Commits (8d87e9cea13b09e12d0d22d4fdebdd5bacbb5c6e)
| Author | SHA1 | Message | Date |
|---|---|---|---|
Peter Dillinger
|
6c595f008a |
Update folly/lang/Align.h (backport to C++11) (#6534)
Summary: For s390x support, some updates in newer version of Align.h are needed. Upgrading just that file as best we can, with one addition to Portability.h and tweaking new code in Align.h to use C++11 only (no non-trivial constexpr functions). Pull Request resolved: https://github.com/facebook/rocksdb/pull/6534 Test Plan: CI, further work in PR https://github.com/facebook/rocksdb/issues/6168 Differential Revision: D20445942 Pulled By: pdillinger fbshipit-source-id: 0cef3c367463c71f3123d12cdf287c573af5e342 |
5 years ago |
|
Aaryaman Sagar
|
77273d4137 |
Fix TSAN failures in DistributedMutex tests (#5684)
Summary:
TSAN was not able to correctly instrument atomic bts and btr instructions, so
when TSAN is enabled implement those with std::atomic::fetch_or and
std::atomic::fetch_and. Also disable tests that fail on TSAN with false
negatives (we know these are false negatives because this other verifiably
correct program fails with the same TSAN error <link>)
```
make clean
TEST_TMPDIR=/dev/shm/rocksdb OPT=-g COMPILE_WITH_TSAN=1 make J=1 -j56 folly_synchronization_distributed_mutex_test
```
This is the code that fails with the same false-negative with TSAN
```
namespace {
class ExceptionWithConstructionTrack : public std::exception {
public:
explicit ExceptionWithConstructionTrack(int id)
: id_{folly::to<std::string>(id)}, constructionTrack_{id} {}
const char* what() const noexcept override {
return id_.c_str();
}
private:
std::string id_;
TestConstruction constructionTrack_;
};
template <typename Storage, typename Atomic>
void transferCurrentException(Storage& storage, Atomic& produced) {
assert(std::current_exception());
new (&storage) std::exception_ptr(std::current_exception());
produced->store(true, std::memory_order_release);
}
void concurrentExceptionPropagationStress(
int numThreads,
std::chrono::milliseconds milliseconds) {
auto&& stop = std::atomic<bool>{false};
auto&& exceptions = std::vector<std::aligned_storage<48, 8>::type>{};
auto&& produced = std::vector<std::unique_ptr<std::atomic<bool>>>{};
auto&& consumed = std::vector<std::unique_ptr<std::atomic<bool>>>{};
auto&& consumers = std::vector<std::thread>{};
for (auto i = 0; i < numThreads; ++i) {
produced.emplace_back(new std::atomic<bool>{false});
consumed.emplace_back(new std::atomic<bool>{false});
exceptions.push_back({});
}
auto producer = std::thread{[&]() {
auto counter = std::vector<int>(numThreads, 0);
for (auto i = 0; true; i = ((i + 1) % numThreads)) {
try {
throw ExceptionWithConstructionTrack{counter.at(i)++};
} catch (...) {
transferCurrentException(exceptions.at(i), produced.at(i));
}
while (!consumed.at(i)->load(std::memory_order_acquire)) {
if (stop.load(std::memory_order_acquire)) {
return;
}
}
consumed.at(i)->store(false, std::memory_order_release);
}
}};
for (auto i = 0; i < numThreads; ++i) {
consumers.emplace_back([&, i]() {
auto counter = 0;
while (true) {
while (!produced.at(i)->load(std::memory_order_acquire)) {
if (stop.load(std::memory_order_acquire)) {
return;
}
}
produced.at(i)->store(false, std::memory_order_release);
try {
auto storage = &exceptions.at(i);
auto exc = folly::launder(
reinterpret_cast<std::exception_ptr*>(storage));
auto copy = std::move(*exc);
exc->std::exception_ptr::~exception_ptr();
std::rethrow_exception(std::move(copy));
} catch (std::exception& exc) {
auto value = std::stoi(exc.what());
EXPECT_EQ(value, counter++);
}
consumed.at(i)->store(true, std::memory_order_release);
}
});
}
std::this_thread::sleep_for(milliseconds);
stop.store(true);
producer.join();
for (auto& thread : consumers) {
thread.join();
}
}
} // namespace
```
Pull Request resolved: https://github.com/facebook/rocksdb/pull/5684
Differential Revision: D16746077
Pulled By: miasantreble
fbshipit-source-id: 8af88dcf9161c05daec1a76290f577918638f79d
|
5 years ago |
|
Aaryaman Sagar
|
38b03c840e |
Port folly/synchronization/DistributedMutex to rocksdb (#5642)
Summary: This ports `folly::DistributedMutex` into RocksDB. The PR includes everything else needed to compile and use DistributedMutex as a component within folly. Most files are unchanged except for some portability stuff and includes. For now, I've put this under `rocksdb/third-party`, but if there is a better folder to put this under, let me know. I also am not sure how or where to put unit tests for third-party stuff like this. It seems like gtest is included already, but I need to link with it from another third-party folder. This also includes some other common components from folly - folly/Optional - folly/ScopeGuard (In particular `SCOPE_EXIT`) - folly/synchronization/ParkingLot (A portable futex-like interface) - folly/synchronization/AtomicNotification (The standard C++ interface for futexes) - folly/Indestructible (For singletons that don't get destroyed without allocations) Pull Request resolved: https://github.com/facebook/rocksdb/pull/5642 Differential Revision: D16544439 fbshipit-source-id: 179b98b5dcddc3075926d31a30f92fd064245731 |
5 years ago |