[chttp2_server] Fix race between connection starting and it being orphaned#37683
Closed
yashykt wants to merge 5 commits intogrpc:masterfrom
Closed
[chttp2_server] Fix race between connection starting and it being orphaned#37683yashykt wants to merge 5 commits intogrpc:masterfrom
yashykt wants to merge 5 commits intogrpc:masterfrom
Conversation
markdroth
approved these changes
Sep 11, 2024
| listener_ = std::move(listener); | ||
| RefCountedPtr<HandshakingState> handshaking_state_ref; | ||
| { | ||
| MutexLock lock(&mu_); |
Member
There was a problem hiding this comment.
The more I look at this code, the more I hate the locking story that we wound up with here. :/ I had to go through the following exercise to convince myself that there weren't any other edge cases here, and I don't see any, but I'm writing down my reasoning, just to provide a sanity check.
It looks like we're doing the following to start handshaking:
ActiveConnection::Start()acquires the lock to grab a ref to the handshaker, then releases the lock before callingHandshakingState::Start().HandshakingState::Start()re-acquires the lock to grab a ref to the handshake manager, then releases the lock before starting the handshake.
And it looks like we're doing the following to orphan:
ActiveConnection::Orphan()acquires the lock to sethandshaking_state_to null, then releases the lock before orphaning theHandshakingStateobject.HandshakingState::Orphan()re-acquires the lock to shutdown the handshake manager.
This means that any time we have thread A starting a connection at the same time as thread B is orphaning it, there are 5 different orders these accesses can occur in, as follows.
In this order, there isn't really any race; the orphan happens after handshaking is started, as you'd expect:
ActiveConnection::Start()HandshakingState::Start()ActiveConnection::Orphan()HandshakingState::Orphan()
In this order, we'll wind up shutting down the handshake manager before we start the handshake, which I believe is handled properly inside the handshake manager (it will cause the handshake to fail immediately):
ActiveConnection::Start()ActiveConnection::Orphan()HandshakingState::Start()HandshakingState::Orphan()
This order is the same as the previous one -- the handshake manager will be shut down before handshaking starts, so the handshake will fail immediately:
ActiveConnection::Start()ActiveConnection::Orphan()HandshakingState::Orphan()HandshakingState::Start()
In this order, there isn't really any race; the orphan happens before handshaking has started, so ActiveConnection::Start() will notice that shutdown_ has been set, and it will be a no-op:
ActiveConnection::Orphan()ActiveConnection::Start()HandshakingState::Start()HandshakingState::Orphan()
This order is the same as the previous one; there isn't really any race here:
ActiveConnection::Orphan()HandshakingState::Orphan()ActiveConnection::Start()HandshakingState::Start()
Assuming I haven't missed anything here, I think this looks good.
Member
Author
|
ugh, I'm causing more races here.. now around refs and unrefs of tcp_server and I'm also causing deadlocks now. I'm thinking that I'll just spend effort on #37601 instead of trying to fix this up and throw away the work. |
markdroth
approved these changes
Oct 2, 2024
Member
markdroth
left a comment
There was a problem hiding this comment.
This looks reasonable, but I'm mostly taking in on faith as a short term fix to address the race condition we're seeing.
As part of redesigning this, we really need to find a better way to structure this code to avoid the synchronization complexity. The current structure is basically impossible for me to reason about.
paulosjca
pushed a commit
to paulosjca/grpc
that referenced
this pull request
Nov 25, 2024
…haned (grpc#37683) Sample race - https://btx.cloud.google.com/invocations/0c4e65f2-3a38-4b4f-b67e-c53a4a4650ea/targets/%2F%2Ftest%2Fcore%2Fend2end:connectivity_test@poller%3Dpoll;config=2aed862ff4fd4384687d63aa95df415c7cb955355c2ab6dc6c6d7a9d123a76ec/log ``` WARNING: ThreadSanitizer: data race (pid=18) Write of size 8 at 0x72300000c318 by thread T29: #0 grpc_core::Chttp2ServerListener* std::__exchange(grpc_core::Chttp2ServerListener*&, grpc_core::Chttp2ServerListener*&) /usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/move.h:152:13 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x68c85) #1 grpc_core::Chttp2ServerListener* std::exchange(grpc_core::Chttp2ServerListener*&, grpc_core::Chttp2ServerListener*&) /usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/utility:287:14 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x68c05) #2 grpc_core::RefCountedPtr::reset(grpc_core::Chttp2ServerListener*) /proc/self/cwd/./src/core/lib/gprpp/ref_counted_ptr.h:126:20 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x68b32) #3 grpc_core::RefCountedPtr::operator=(grpc_core::RefCountedPtr&&) /proc/self/cwd/./src/core/lib/gprpp/ref_counted_ptr.h:66:5 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x54380) #4 grpc_core::Chttp2ServerListener::ActiveConnection::Start(grpc_core::RefCountedPtr, std::unique_ptr, grpc_core::ChannelArgs const&) /proc/self/cwd/src/core/ext/transport/chttp2/server/chttp2_server.cc:615:13 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x48914) #5 grpc_core::Chttp2ServerListener::OnAccept(void*, grpc_endpoint*, grpc_pollset*, grpc_tcp_server_acceptor*) /proc/self/cwd/src/core/ext/transport/chttp2/server/chttp2_server.cc:881:21 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x49ce2) #6 CreateEventEngineListener(grpc_tcp_server*, grpc_closure*, grpc_event_engine::experimental::EndpointConfig const&, grpc_tcp_server**)::$_2::operator()(std::unique_ptr>, grpc_event_engine::experimental::MemoryAllocator) const /proc/self/cwd/src/core/lib/iomgr/tcp_server_posix.cc:228:11 (liblibiomgr.so+0xef627) #7 decltype(std::declval()(std::declval>>(), std::declval())) absl::lts_20240116::base_internal::Callable::Invoke>, grpc_event_engine::experimental::MemoryAllocator>(CreateEventEngineListener(grpc_tcp_server*, grpc_closure*, grpc_event_engine::experimental::EndpointConfig const&, grpc_tcp_server**)::$_2&, std::unique_ptr>&&, grpc_event_engine::experimental::MemoryAllocator&&) /proc/self/cwd/external/com_google_absl/absl/base/internal/invoke.h:185:12 (liblibiomgr.so+0xef3c2) grpc#8 decltype(Invoker>, grpc_event_engine::experimental::MemoryAllocator>::type::Invoke(std::declval(), std::declval>>(), std::declval())) absl::lts_20240116::base_internal::invoke>, grpc_event_engine::experimental::MemoryAllocator>(CreateEventEngineListener(grpc_tcp_server*, grpc_closure*, grpc_event_engine::experimental::EndpointConfig const&, grpc_tcp_server**)::$_2&, std::unique_ptr>&&, grpc_event_engine::experimental::MemoryAllocator&&) /proc/self/cwd/external/com_google_absl/absl/base/internal/invoke.h:212:10 (liblibiomgr.so+0xef325) grpc#9 void absl::lts_20240116::internal_any_invocable::InvokeR>, grpc_event_engine::experimental::MemoryAllocator, void>(CreateEventEngineListener(grpc_tcp_server*, grpc_closure*, grpc_event_engine::experimental::EndpointConfig const&, grpc_tcp_server**)::$_2&, std::unique_ptr>&&, grpc_event_engine::experimental::MemoryAllocator&&) /proc/self/cwd/external/com_google_absl/absl/functional/internal/any_invocable.h:132:3 (liblibiomgr.so+0xef2b5) grpc#10 void absl::lts_20240116::internal_any_invocable::LocalInvoker>, grpc_event_engine::experimental::MemoryAllocator>(absl::lts_20240116::internal_any_invocable::TypeErasedState*, absl::lts_20240116::internal_any_invocable::ForwardedParameter>>::type, absl::lts_20240116::internal_any_invocable::ForwardedParameter::type) /proc/self/cwd/external/com_google_absl/absl/functional/internal/any_invocable.h:310:10 (liblibiomgr.so+0xef1e2) grpc#11 absl::lts_20240116::internal_any_invocable::Impl>, grpc_event_engine::experimental::MemoryAllocator)>::operator()(std::unique_ptr>, grpc_event_engine::experimental::MemoryAllocator) /proc/self/cwd/external/com_google_absl/absl/functional/internal/any_invocable.h:868:1 (libsrc_Score_Slibposix_Uevent_Uengine.so+0xa754f) grpc#12 grpc_event_engine::experimental::ThreadyEventEngine::CreateListener(absl::lts_20240116::AnyInvocable>, grpc_event_engine::experimental::MemoryAllocator)>, absl::lts_20240116::AnyInvocable, grpc_event_engine::experimental::EndpointConfig const&, std::unique_ptr>)::$_0::operator()(std::unique_ptr>, grpc_event_engine::experimental::MemoryAllocator) const::'lambda'()::operator()() /proc/self/cwd/src/core/lib/event_engine/thready_event_engine/thready_event_engine.cc:61:15 (libsrc_Score_Slibthready_Uevent_Uengine.so+0x27cdb) grpc#13 decltype(std::declval>, grpc_event_engine::experimental::MemoryAllocator)>, absl::lts_20240116::AnyInvocable, grpc_event_engine::experimental::EndpointConfig const&, std::unique_ptr>)::$_0::operator()(std::unique_ptr>, grpc_event_engine::experimental::MemoryAllocator) const::'lambda'()&>()()) absl::lts_20240116::base_internal::Callable::Invoke>, grpc_event_engine::experimental::MemoryAllocator)>, absl::lts_20240116::AnyInvocable, grpc_event_engine::experimental::EndpointConfig const&, std::unique_ptr>)::$_0::operator()(std::unique_ptr>, grpc_event_engine::experimental::MemoryAllocator) const::'lambda'()&>(grpc_event_engine::experimental::ThreadyEventEngine::CreateListener(absl::lts_20240116::AnyInvocable>, grpc_event_engine::experimental::MemoryAllocator)>, absl::lts_20240116::AnyInvocable, grpc_event_engine::experimental::EndpointConfig const&, std::unique_ptr>)::$_0::operator()(std::unique_ptr>, grpc_event_engine::experimental::MemoryAllocator) const::'lambda'()&) /proc/self/cwd/external/com_google_absl/absl/base/internal/invoke.h:185:12 (libsrc_Score_Slibthready_Uevent_Uengine.so+0x27c45) grpc#14 decltype(Invoker>, grpc_event_engine::experimental::MemoryAllocator)>, absl::lts_20240116::AnyInvocable, grpc_event_engine::experimental::EndpointConfig const&, std::unique_ptr>)::$_0::operator()(std::unique_ptr>, grpc_event_engine::experimental::MemoryAllocator) const::'lambda'()&>::type::Invoke(std::declval>, grpc_event_engine::experimental::MemoryAllocator)>, absl::lts_20240116::AnyInvocable, grpc_event_engine::experimental::EndpointConfig const&, std::unique_ptr>)::$_0::operator()(std::unique_ptr>, grpc_event_engine::experimental::MemoryAllocator) const::'lambda'()&>())) absl::lts_20240116::base_internal::invoke>, grpc_event_engine::experimental::MemoryAllocator)>, absl::lts_20240116::AnyInvocable, grpc_event_engine::experimental::EndpointConfig const&, std::unique_ptr>)::$_0::operator()(std::unique_ptr>, grpc_event_engine::experimental::MemoryAllocator) const::'lambda'()&>(grpc_event_engine::experimental::ThreadyEventEngine::CreateListener(absl::lts_20240116::AnyInvocable>, grpc_event_engine::experimental::MemoryAllocator)>, absl::lts_20240116::AnyInvocable, grpc_event_engine::experimental::EndpointConfig const&, std::unique_ptr>)::$_0::operator()(std::unique_ptr>, grpc_event_engine::experimental::MemoryAllocator) const::'lambda'()&) /proc/self/cwd/external/com_google_absl/absl/base/internal/invoke.h:212:10 (libsrc_Score_Slibthready_Uevent_Uengine.so+0x27bf5) grpc#15 void absl::lts_20240116::internal_any_invocable::InvokeR>, grpc_event_engine::experimental::MemoryAllocator)>, absl::lts_20240116::AnyInvocable, grpc_event_engine::experimental::EndpointConfig const&, std::unique_ptr>)::$_0::operator()(std::unique_ptr>, grpc_event_engine::experimental::MemoryAllocator) const::'lambda'()&, void>(grpc_event_engine::experimental::ThreadyEventEngine::CreateListener(absl::lts_20240116::AnyInvocable>, grpc_event_engine::experimental::MemoryAllocator)>, absl::lts_20240116::AnyInvocable, grpc_event_engine::experimental::EndpointConfig const&, std::unique_ptr>)::$_0::operator()(std::unique_ptr>, grpc_event_engine::experimental::MemoryAllocator) const::'lambda'()&) /proc/self/cwd/external/com_google_absl/absl/functional/internal/any_invocable.h:132:3 (libsrc_Score_Slibthready_Uevent_Uengine.so+0x27ba5) grpc#16 void absl::lts_20240116::internal_any_invocable::RemoteInvoker>, grpc_event_engine::experimental::MemoryAllocator)>, absl::lts_20240116::AnyInvocable, grpc_event_engine::experimental::EndpointConfig const&, std::unique_ptr>)::$_0::operator()(std::unique_ptr>, grpc_event_engine::experimental::MemoryAllocator) const::'lambda'()&>(absl::lts_20240116::internal_any_invocable::TypeErasedState*) /proc/self/cwd/external/com_google_absl/absl/functional/internal/any_invocable.h:368:10 (libsrc_Score_Slibthready_Uevent_Uengine.so+0x279cd) grpc#17 absl::lts_20240116::internal_any_invocable::Impl::operator()() /proc/self/cwd/external/com_google_absl/absl/functional/internal/any_invocable.h:868:1 (libtest_Score_Send2end_Slibconnectivity_Ulibrary.so+0x337ff) grpc#18 grpc_core::Thread::Thread(char const*, absl::lts_20240116::AnyInvocable, bool*, grpc_core::Thread::Options const&)::'lambda'(void*)::operator()(void*) const /proc/self/cwd/./src/core/lib/gprpp/thd.h:108:15 (libsrc_Score_Slibthready_Uevent_Uengine.so+0x2e264) grpc#19 grpc_core::Thread::Thread(char const*, absl::lts_20240116::AnyInvocable, bool*, grpc_core::Thread::Options const&)::'lambda'(void*)::__invoke(void*) /proc/self/cwd/./src/core/lib/gprpp/thd.h:105:13 (libsrc_Score_Slibthready_Uevent_Uengine.so+0x2e1e9) grpc#20 grpc_core::(anonymous namespace)::ThreadInternalsPosix::ThreadInternalsPosix(char const*, void (*)(void*), void*, bool*, grpc_core::Thread::Options const&)::'lambda'(void*)::operator()(void*) const /proc/self/cwd/src/core/lib/gprpp/posix/thd.cc:148:11 (liblibgpr.so+0x1d830) grpc#21 grpc_core::(anonymous namespace)::ThreadInternalsPosix::ThreadInternalsPosix(char const*, void (*)(void*), void*, bool*, grpc_core::Thread::Options const&)::'lambda'(void*)::__invoke(void*) /proc/self/cwd/src/core/lib/gprpp/posix/thd.cc:118:9 (liblibgpr.so+0x1d659) Previous read of size 8 at 0x72300000c318 by main thread: #0 grpc_core::RefCountedPtr::operator!=(std::nullptr_t) const /proc/self/cwd/./src/core/lib/gprpp/ref_counted_ptr.h:192:50 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x52345) #1 grpc_core::Chttp2ServerListener::ActiveConnection::HandshakingState::~HandshakingState() /proc/self/cwd/src/core/ext/transport/chttp2/server/chttp2_server.cc:394:30 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x463ed) #2 std::enable_if::value, grpc_core::Chttp2ServerListener::ActiveConnection::HandshakingState*>::type grpc_event_engine::experimental::MemoryAllocator::New, grpc_pollset*&, std::unique_ptr, grpc_core::ChannelArgs const&>(grpc_core::RefCountedPtr&&, grpc_pollset*&, std::unique_ptr&&, grpc_core::ChannelArgs const&)::Wrapper::~Wrapper() /proc/self/cwd/include/grpc/event_engine/memory_allocator.h:117:65 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x67a1c) #3 std::enable_if::value, grpc_core::Chttp2ServerListener::ActiveConnection::HandshakingState*>::type grpc_event_engine::experimental::MemoryAllocator::New, grpc_pollset*&, std::unique_ptr, grpc_core::ChannelArgs const&>(grpc_core::RefCountedPtr&&, grpc_pollset*&, std::unique_ptr&&, grpc_core::ChannelArgs const&)::Wrapper::~Wrapper() /proc/self/cwd/include/grpc/event_engine/memory_allocator.h:117:27 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x67a59) #4 void grpc_core::UnrefDelete::operator()(grpc_core::Chttp2ServerListener::ActiveConnection::HandshakingState*) const /proc/self/cwd/./src/core/lib/gprpp/ref_counted.h:224:5 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x6449d) #5 grpc_core::InternallyRefCounted::Unref() /proc/self/cwd/./src/core/lib/gprpp/orphanable.h:132:7 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x52581) #6 grpc_core::Chttp2ServerListener::ActiveConnection::HandshakingState::Orphan() /proc/self/cwd/src/core/ext/transport/chttp2/server/chttp2_server.cc:407:3 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x466ac) #7 void grpc_core::OrphanableDelete::operator()(grpc_core::Chttp2ServerListener::ActiveConnection::HandshakingState*) /proc/self/cwd/./src/core/lib/gprpp/orphanable.h:60:8 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x653b1) grpc#8 std::unique_ptr::~unique_ptr() /usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/unique_ptr.h:292:4 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x53ddf) grpc#9 grpc_core::Chttp2ServerListener::ActiveConnection::Orphan() /proc/self/cwd/src/core/ext/transport/chttp2/server/chttp2_server.cc:581:1 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x487db) grpc#10 void grpc_core::OrphanableDelete::operator()(grpc_core::Chttp2ServerListener::ActiveConnection*) /proc/self/cwd/./src/core/lib/gprpp/orphanable.h:60:8 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x66b01) grpc#11 std::unique_ptr::~unique_ptr() /usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/unique_ptr.h:292:4 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x53d1f) grpc#12 std::pair>::~pair() /usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_pair.h:208:12 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x597f9) grpc#13 void __gnu_cxx::new_allocator>>>::destroy>>(std::pair>*) /usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/ext/new_allocator.h:152:10 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x597c1) grpc#14 void std::allocator_traits>>>>::destroy>>(std::allocator>>>&, std::pair>*) /usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/alloc_traits.h:496:8 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x59725) grpc#15 std::_Rb_tree>, std::_Select1st>>, std::less, std::allocator>>>::_M_destroy_node(std::_Rb_tree_node>>*) /usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_tree.h:642:2 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x59674) grpc#16 std::_Rb_tree>, std::_Select1st>>, std::less, std::allocator>>>::_M_drop_node(std::_Rb_tree_node>>*) /usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_tree.h:650:2 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x595f9) grpc#17 std::_Rb_tree>, std::_Select1st>>, std::less, std::allocator>>>::_M_erase(std::_Rb_tree_node>>*) /usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_tree.h:1920:4 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x5945f) grpc#18 std::_Rb_tree>, std::_Select1st>>, std::less, std::allocator>>>::~_Rb_tree() /usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_tree.h:1000:9 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x593c5) grpc#19 std::map, std::less, std::allocator>>>::~map() /usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_map.h:300:22 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x51525) grpc#20 grpc_core::Chttp2ServerListener::Orphan() /proc/self/cwd/src/core/ext/transport/chttp2/server/chttp2_server.cc:923:1 (libsrc_Score_Slibgrpc_Utransport_Uchttp2_Userver.so+0x4b5dd) grpc#21 void grpc_core::OrphanableDelete::operator()(grpc_core::Server::ListenerInterface*) /proc/self/cwd/./src/core/lib/gprpp/orphanable.h:60:8 (libsrc_Score_Slibchaotic_Ugood_Userver.so+0x1d0981) grpc#22 std::unique_ptr::reset(grpc_core::Server::ListenerInterface*) /usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/unique_ptr.h:402:4 (liblibserver.so+0x1d5c21) grpc#23 grpc_core::Server::StopListening() /proc/self/cwd/src/core/server/server.cc:1211:23 (liblibserver.so+0x1b9c62) grpc#24 grpc_core::Server::ShutdownAndNotify(grpc_completion_queue*, void*) /proc/self/cwd/src/core/server/server.cc:1195:3 (liblibserver.so+0x1b97da) grpc#25 grpc_server_shutdown_and_notify /proc/self/cwd/src/core/server/server.cc:1829:37 (liblibserver.so+0x1bf212) grpc#26 grpc_core::CoreEnd2endTest::ShutdownServerAndNotify(int) /proc/self/cwd/./test/core/end2end/end2end_tests.h:459:5 (libtest_Score_Send2end_Slibconnectivity_Ulibrary.so+0x33370) grpc#27 grpc_core::(anonymous namespace)::CoreEnd2endTest_RetryHttp2Test_ConnectivityWatch::RunTest() /proc/self/cwd/test/core/end2end/tests/connectivity.cc:74:3 (libtest_Score_Send2end_Slibconnectivity_Ulibrary.so+0x2ee8d) grpc#28 grpc_core::(anonymous namespace)::CoreEnd2endTest_RetryHttp2Test_ConnectivityWatch::TestBody() /proc/self/cwd/test/core/end2end/tests/connectivity.cc:32:1 (libtest_Score_Send2end_Slibconnectivity_Ulibrary.so+0x2dc96) grpc#29 void testing::internal::HandleSehExceptionsInMethodIfSupported(testing::Test*, void (testing::Test::*)(), char const*) /proc/self/cwd/external/com_google_googletest/googletest/src/gtest.cc:2612:10 (libexternal_Scom_Ugoogle_Ugoogletest_Slibgtest.so+0x16d2dc) grpc#30 void testing::internal::HandleExceptionsInMethodIfSupported(testing::Test*, void (testing::Test::*)(), char const*) /proc/self/cwd/external/com_google_googletest/googletest/src/gtest.cc:2648:14 (libexternal_Scom_Ugoogle_Ugoogletest_Slibgtest.so+0x14a51d) grpc#31 testing::Test::Run() /proc/self/cwd/external/com_google_googletest/googletest/src/gtest.cc:2687:5 (libexternal_Scom_Ugoogle_Ugoogletest_Slibgtest.so+0x120458) grpc#32 testing::TestInfo::Run() /proc/self/cwd/external/com_google_googletest/googletest/src/gtest.cc:2836:11 (libexternal_Scom_Ugoogle_Ugoogletest_Slibgtest.so+0x1215f3) grpc#33 testing::TestSuite::Run() /proc/self/cwd/external/com_google_googletest/googletest/src/gtest.cc:3015:30 (libexternal_Scom_Ugoogle_Ugoogletest_Slibgtest.so+0x12230c) grpc#34 testing::internal::UnitTestImpl::RunAllTests() /proc/self/cwd/external/com_google_googletest/googletest/src/gtest.cc:5921:44 (libexternal_Scom_Ugoogle_Ugoogletest_Slibgtest.so+0x138142) grpc#35 bool testing::internal::HandleSehExceptionsInMethodIfSupported(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*) /proc/self/cwd/external/com_google_googletest/googletest/src/gtest.cc:2612:10 (libexternal_Scom_Ugoogle_Ugoogletest_Slibgtest.so+0x17508f) grpc#36 bool testing::internal::HandleExceptionsInMethodIfSupported(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*) /proc/self/cwd/external/com_google_googletest/googletest/src/gtest.cc:2648:14 (libexternal_Scom_Ugoogle_Ugoogletest_Slibgtest.so+0x14e5b3) grpc#37 testing::UnitTest::Run() /proc/self/cwd/external/com_google_googletest/googletest/src/gtest.cc:5485:10 (libexternal_Scom_Ugoogle_Ugoogletest_Slibgtest.so+0x13795b) grpc#38 RUN_ALL_TESTS() /proc/self/cwd/external/com_google_googletest/googletest/include/gtest/gtest.h:2316:73 (libtest_Score_Send2end_Slibend2end_Utest_Umain.so+0x8457) grpc#39 main /proc/self/cwd/test/core/end2end/end2end_test_main.cc:50:10 (libtest_Score_Send2end_Slibend2end_Utest_Umain.so+0x77b6) ``` We start the connection outside the critical region and that's where we supply the listener ref to the connection. There is a freak case where the connection can be orphaned due to the listener stopping to serve and the `Orphan()` would also be trying to access the listener ref resulting in a race. Closes grpc#37683 COPYBARA_INTEGRATE_REVIEW=grpc#37683 from yashykt:FixChttp2ServerRace e3c4529 PiperOrigin-RevId: 681552145
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Sample race - https://btx.cloud.google.com/invocations/0c4e65f2-3a38-4b4f-b67e-c53a4a4650ea/targets/%2F%2Ftest%2Fcore%2Fend2end:connectivity_test@poller%3Dpoll;config=2aed862ff4fd4384687d63aa95df415c7cb955355c2ab6dc6c6d7a9d123a76ec/log
We start the connection outside the critical region and that's where we supply the listener ref to the connection. There is a freak case where the connection can be orphaned due to the listener stopping to serve and the
Orphan()would also be trying to access the listener ref resulting in a race.