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dhruv
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Aug 23, 2022
… response fac04cb refactor: Add lock annotations to Active* methods (MacroFake) fac15ff Fix logical race in rest_getutxos (MacroFake) fa97a52 Fix UB/data-race in RPCNotifyBlockChange (MacroFake) fa530bc Add ChainstateManager::GetMutex(), an alias for ::cs_main (MacroFake) Pull request description: This fixes two issues: * A data race in `ActiveChain`, which returns a reference to the chain (a `std::vector`), which is not thread safe. See also below traceback. * A corrupt rest response, which returns a blockheight and blockhash, which are unrelated to each other and to the result, as the chain might advance between each call without cs_main held. The issues are fixed by taking cs_main and holding it for the required time. ``` ================== WARNING: ThreadSanitizer: data race (pid=32335) Write of size 8 at 0x7b3c000008f0 by thread T22 (mutexes: write M131626, write M151, write M131553): #0 std::__1::enable_if<(is_move_constructible<CBlockIndex**>::value) && (is_move_assignable<CBlockIndex**>::value), void>::type std::__1::swap<CBlockIndex**>(CBlockIndex**&, CBlockIndex**&) /usr/lib/llvm-13/bin/../include/c++/v1/__utility/swap.h:39:7 (bitcoind+0x501239) #1 std::__1::vector<CBlockIndex*, std::__1::allocator<CBlockIndex*> >::__swap_out_circular_buffer(std::__1::__split_buffer<CBlockIndex*, std::__1::allocator<CBlockIndex*>&>&) /usr/lib/llvm-13/bin/../include/c++/v1/vector:977:5 (bitcoind+0x501239) #2 std::__1::vector<CBlockIndex*, std::__1::allocator<CBlockIndex*> >::__append(unsigned long) /usr/lib/llvm-13/bin/../include/c++/v1/vector:1117:9 (bitcoind+0x501239) #3 std::__1::vector<CBlockIndex*, std::__1::allocator<CBlockIndex*> >::resize(unsigned long) /usr/lib/llvm-13/bin/../include/c++/v1/vector:2046:15 (bitcoind+0x4ffe29) #4 CChain::SetTip(CBlockIndex*) src/chain.cpp:19:12 (bitcoind+0x4ffe29) #5 CChainState::ConnectTip(BlockValidationState&, CBlockIndex*, std::__1::shared_ptr<CBlock const> const&, ConnectTrace&, DisconnectedBlockTransactions&) src/validation.cpp:2748:13 (bitcoind+0x475d00) #6 CChainState::ActivateBestChainStep(BlockValidationState&, CBlockIndex*, std::__1::shared_ptr<CBlock const> const&, bool&, ConnectTrace&) src/validation.cpp:2884:18 (bitcoind+0x47739e) #7 CChainState::ActivateBestChain(BlockValidationState&, std::__1::shared_ptr<CBlock const>) src/validation.cpp:3011:22 (bitcoind+0x477baf) #8 node::ThreadImport(ChainstateManager&, std::__1::vector<fs::path, std::__1::allocator<fs::path> >, ArgsManager const&) src/node/blockstorage.cpp:883:30 (bitcoind+0x23cd74) #9 AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7::operator()() const src/init.cpp:1657:9 (bitcoind+0x15863e) #10 decltype(static_cast<AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7&>(fp)()) std::__1::__invoke<AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7&>(AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7&) /usr/lib/llvm-13/bin/../include/c++/v1/type_traits:3918:1 (bitcoind+0x15863e) #11 void std::__1::__invoke_void_return_wrapper<void, true>::__call<AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7&>(AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7&) /usr/lib/llvm-13/bin/../include/c++/v1/__functional/invoke.h:61:9 (bitcoind+0x15863e) #12 std::__1::__function::__alloc_func<AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7, std::__1::allocator<AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7>, void ()>::operator()() /usr/lib/llvm-13/bin/../include/c++/v1/__functional/function.h:171:16 (bitcoind+0x15863e) #13 std::__1::__function::__func<AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7, std::__1::allocator<AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7>, void ()>::operator()() /usr/lib/llvm-13/bin/../include/c++/v1/__functional/function.h:345:12 (bitcoind+0x15863e) #14 std::__1::__function::__value_func<void ()>::operator()() const /usr/lib/llvm-13/bin/../include/c++/v1/__functional/function.h:498:16 (bitcoind+0x88891f) #15 std::__1::function<void ()>::operator()() const /usr/lib/llvm-13/bin/../include/c++/v1/__functional/function.h:1175:12 (bitcoind+0x88891f) #16 util::TraceThread(char const*, std::__1::function<void ()>) src/util/thread.cpp:18:9 (bitcoind+0x88891f) #17 decltype(static_cast<void (*>(fp)(static_cast<char const*>(fp0), static_cast<AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7>(fp0))) std::__1::__invoke<void (*)(char const*, std::__1::function<void ()>), char const*, AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7>(void (*&&)(char const*, std::__1::function<void ()>), char const*&&, AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7&&) /usr/lib/llvm-13/bin/../include/c++/v1/type_traits:3918:1 (bitcoind+0x157e6a) #18 void std::__1::__thread_execute<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct> >, void (*)(char const*, std::__1::function<void ()>), char const*, AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7, 2ul, 3ul>(std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct> >, void (*)(char const*, std::__1::function<void ()>), char const*, AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7>&, std::__1::__tuple_indices<2ul, 3ul>) /usr/lib/llvm-13/bin/../include/c++/v1/thread:280:5 (bitcoind+0x157e6a) #19 void* std::__1::__thread_proxy<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct> >, void (*)(char const*, std::__1::function<void ()>), char const*, AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7> >(void*) /usr/lib/llvm-13/bin/../include/c++/v1/thread:291:5 (bitcoind+0x157e6a) Previous read of size 8 at 0x7b3c000008f0 by main thread: #0 std::__1::vector<CBlockIndex*, std::__1::allocator<CBlockIndex*> >::size() const /usr/lib/llvm-13/bin/../include/c++/v1/vector:680:61 (bitcoind+0x15179d) #1 CChain::Tip() const src/./chain.h:449:23 (bitcoind+0x15179d) #2 ChainstateManager::ActiveTip() const src/./validation.h:927:59 (bitcoind+0x15179d) #3 AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*) src/init.cpp:1841:35 (bitcoind+0x15179d) #4 AppInit(node::NodeContext&, int, char**) src/bitcoind.cpp:231:43 (bitcoind+0x133fd2) #5 main src/bitcoind.cpp:275:13 (bitcoind+0x133fd2) Location is heap block of size 232 at 0x7b3c00000870 allocated by main thread: #0 operator new(unsigned long) <null> (bitcoind+0x132668) #1 ChainstateManager::InitializeChainstate(CTxMemPool*, std::__1::optional<uint256> const&) src/validation.cpp:4851:21 (bitcoind+0x48e26b) #2 node::LoadChainstate(bool, ChainstateManager&, CTxMemPool*, bool, Consensus::Params const&, bool, long, long, long, bool, bool, std::__1::function<bool ()>, std::__1::function<void ()>) src/node/chainstate.cpp:31:14 (bitcoind+0x24de07) #3 AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*) src/init.cpp:1438:32 (bitcoind+0x14e994) #4 AppInit(node::NodeContext&, int, char**) src/bitcoind.cpp:231:43 (bitcoind+0x133fd2) #5 main src/bitcoind.cpp:275:13 (bitcoind+0x133fd2) Mutex M131626 (0x7b3c00000898) created at: #0 pthread_mutex_lock <null> (bitcoind+0xda898) #1 std::__1::mutex::lock() <null> (libc++.so.1+0x49f35) #2 node::ThreadImport(ChainstateManager&, std::__1::vector<fs::path, std::__1::allocator<fs::path> >, ArgsManager const&) src/node/blockstorage.cpp:883:30 (bitcoind+0x23cd74) #3 AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7::operator()() const src/init.cpp:1657:9 (bitcoind+0x15863e) #4 decltype(static_cast<AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7&>(fp)()) std::__1::__invoke<AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7&>(AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7&) /usr/lib/llvm-13/bin/../include/c++/v1/type_traits:3918:1 (bitcoind+0x15863e) #5 void std::__1::__invoke_void_return_wrapper<void, true>::__call<AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7&>(AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7&) /usr/lib/llvm-13/bin/../include/c++/v1/__functional/invoke.h:61:9 (bitcoind+0x15863e) #6 std::__1::__function::__alloc_func<AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7, std::__1::allocator<AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7>, void ()>::operator()() /usr/lib/llvm-13/bin/../include/c++/v1/__functional/function.h:171:16 (bitcoind+0x15863e) #7 std::__1::__function::__func<AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7, std::__1::allocator<AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7>, void ()>::operator()() /usr/lib/llvm-13/bin/../include/c++/v1/__functional/function.h:345:12 (bitcoind+0x15863e) #8 std::__1::__function::__value_func<void ()>::operator()() const /usr/lib/llvm-13/bin/../include/c++/v1/__functional/function.h:498:16 (bitcoind+0x88891f) #9 std::__1::function<void ()>::operator()() const /usr/lib/llvm-13/bin/../include/c++/v1/__functional/function.h:1175:12 (bitcoind+0x88891f) #10 util::TraceThread(char const*, std::__1::function<void ()>) src/util/thread.cpp:18:9 (bitcoind+0x88891f) #11 decltype(static_cast<void (*>(fp)(static_cast<char const*>(fp0), static_cast<AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7>(fp0))) std::__1::__invoke<void (*)(char const*, std::__1::function<void ()>), char const*, AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7>(void (*&&)(char const*, std::__1::function<void ()>), char const*&&, AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7&&) /usr/lib/llvm-13/bin/../include/c++/v1/type_traits:3918:1 (bitcoind+0x157e6a) #12 void std::__1::__thread_execute<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct> >, void (*)(char const*, std::__1::function<void ()>), char const*, AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7, 2ul, 3ul>(std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct> >, void (*)(char const*, std::__1::function<void ()>), char const*, AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7>&, std::__1::__tuple_indices<2ul, 3ul>) /usr/lib/llvm-13/bin/../include/c++/v1/thread:280:5 (bitcoind+0x157e6a) #13 void* std::__1::__thread_proxy<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct> >, void (*)(char const*, std::__1::function<void ()>), char const*, AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7> >(void*) /usr/lib/llvm-13/bin/../include/c++/v1/thread:291:5 (bitcoind+0x157e6a) Mutex M151 (0x55aacb8ea030) created at: #0 pthread_mutex_init <null> (bitcoind+0xbed2f) #1 std::__1::recursive_mutex::recursive_mutex() <null> (libc++.so.1+0x49fb3) #2 __libc_start_main <null> (libc.so.6+0x29eba) Mutex M131553 (0x7b4c000042e0) created at: #0 pthread_mutex_init <null> (bitcoind+0xbed2f) #1 std::__1::recursive_mutex::recursive_mutex() <null> (libc++.so.1+0x49fb3) #2 std::__1::__unique_if<CTxMemPool>::__unique_single std::__1::make_unique<CTxMemPool, CBlockPolicyEstimator*, int const&>(CBlockPolicyEstimator*&&, int const&) /usr/lib/llvm-13/bin/../include/c++/v1/__memory/unique_ptr.h:728:32 (bitcoind+0x15c81d) #3 AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*) src/init.cpp:1426:24 (bitcoind+0x14e7b4) #4 AppInit(node::NodeContext&, int, char**) src/bitcoind.cpp:231:43 (bitcoind+0x133fd2) #5 main src/bitcoind.cpp:275:13 (bitcoind+0x133fd2) Thread T22 'b-loadblk' (tid=32370, running) created by main thread at: #0 pthread_create <null> (bitcoind+0xbd5bd) #1 std::__1::__libcpp_thread_create(unsigned long*, void* (*)(void*), void*) /usr/lib/llvm-13/bin/../include/c++/v1/__threading_support:443:10 (bitcoind+0x155e06) #2 std::__1::thread::thread<void (*)(char const*, std::__1::function<void ()>), char const (&) [8], AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7, void>(void (*&&)(char const*, std::__1::function<void ()>), char const (&) [8], AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*)::$_7&&) /usr/lib/llvm-13/bin/../include/c++/v1/thread:307:16 (bitcoind+0x155e06) #3 AppInitMain(node::NodeContext&, interfaces::BlockAndHeaderTipInfo*) src/init.cpp:1656:29 (bitcoind+0x150164) #4 AppInit(node::NodeContext&, int, char**) src/bitcoind.cpp:231:43 (bitcoind+0x133fd2) #5 main src/bitcoind.cpp:275:13 (bitcoind+0x133fd2) SUMMARY: ThreadSanitizer: data race /usr/lib/llvm-13/bin/../include/c++/v1/__utility/swap.h:39:7 in std::__1::enable_if<(is_move_constructible<CBlockIndex**>::value) && (is_move_assignable<CBlockIndex**>::value), void>::type std::__1::swap<CBlockIndex**>(CBlockIndex**&, CBlockIndex**&) ================== ``` From https://cirrus-ci.com/task/5612886578954240?logs=ci#L4868 ACKs for top commit: achow101: re-ACK fac04cb theStack: Code-review ACK fac04cb Tree-SHA512: 9d619f99ff6373874c7ffe1db20674575605646b4b54b692fb54515a4a49f110a770026d7320ed6dfeaa7976be4cd89e93f821acdbf22c7662bd1c5be0cedcd2
dhruv
pushed a commit
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Dec 14, 2022
e4be0e9 test: add -maxtipage test for the maximum allowable value (James O'Beirne) a451e83 fix: validation: cast now() to seconds for maxtipage comparison (James O'Beirne) Pull request description: Since bitcoin/bitcoin@faf4487, the maxtipage comparison in IsInitialBlockDownload() has been broken, since the NodeClock::now() time_point is in the system's native denomination (nanoseconds). Without this patch, specifying the maximum allowable -maxtipage (9223372036854775807) results in a SIGABRT crash: ``` % gdb --args ./src/bitcoind -maxtipage=9223372036854775207 -minimumchainwork=0x00 -stopatheight=30000 ... 2022-11-09T15:55:17Z [dnsseed] dnsseed thread exit [Thread 0x7fff937fe640 (LWP 69883) exited] Thread 29 "b-msghand" received signal SIGABRT, Aborted. [Switching to Thread 0x7fff91ffb640 (LWP 69886)] __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at ./nptl/pthread_kill.c:44 44 ./nptl/pthread_kill.c: No such file or directory. (gdb) bt #0 __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at ./nptl/pthread_kill.c:44 #1 0x00007ffff768989f in __pthread_kill_internal (signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:78 #2 0x00007ffff763da52 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26 #3 0x00007ffff7628469 in __GI_abort () at ./stdlib/abort.c:79 #4 0x00007ffff7cf79a4 in __mulvdi3 () from /lib/x86_64-linux-gnu/libgcc_s.so.1 #5 0x00005555558d13ab in std::chrono::__duration_cast_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> >, std::ratio<1000000000l, 1l>, long, false, true>::__cast<long, std::ratio<1l, 1l> > (__d=...) at /usr/include/c++/12/bits/chrono.h:521 #6 std::chrono::duration_cast<std::chrono::duration<long, std::ratio<1l, 1000000000l> >, long, std::ratio<1l, 1l> > (__d=...) at /usr/include/c++/12/bits/chrono.h:260 #7 std::chrono::duration<long, std::ratio<1l, 1000000000l> >::duration<long, std::ratio<1l, 1l>, void> (__d=..., this=<optimized out>) at /usr/include/c++/12/bits/chrono.h:514 #8 std::chrono::operator-<long, std::ratio<1l, 1000000000l>, long, std::ratio<1l, 1l> > (__rhs=..., __lhs=...) at /usr/include/c++/12/bits/chrono.h:650 #9 std::chrono::operator-<NodeClock, std::chrono::duration<long, std::ratio<1l, 1000000000l> >, long, std::ratio<1l, 1l> > (__rhs=..., __lhs=...) at /usr/include/c++/12/bits/chrono.h:1020 #10 Chainstate::IsInitialBlockDownload (this=0x555556071940) at ./src/validation.cpp:1545 #11 0x00005555556efd1e in operator() (__closure=<optimized out>) at ./src/net_processing.cpp:3369 #12 (anonymous namespace)::PeerManagerImpl::ProcessMessage (this=0x555556219be0, pfrom=..., msg_type=..., vRecv=..., time_received=..., interruptMsgProc=...) at ./src/net_processing.cpp:3369 #13 0x00005555556f75cc in (anonymous namespace)::PeerManagerImpl::ProcessMessages (this=0x555556219be0, pfrom=<optimized out>, interruptMsgProc=std::atomic<bool> = { false }) at ./src/net_processing.cpp:4985 #14 0x00005555556a83c9 in CConnman::ThreadMessageHandler (this=0x5555560ebc70) at ./src/net.cpp:2014 #15 0x0000555555c4d5d6 in std::function<void ()>::operator()() const (this=0x7fff91ffadb0) at /usr/include/c++/12/bits/std_function.h:591 #16 util::TraceThread(std::basic_string_view<char, std::char_traits<char> >, std::function<void ()>) ( thread_name="0\255\377\221\377\177\000\000\v\000\000\000\000\000\000\000TraceThread\000\000\000\000\000P\255\377\221\377\177\000\000\017\000\000\000\000\000\000\000util/thread.cpp\000\000\000\000\000\000\000\000\000\000ihB鵿6\000\000\000\000\000\000\000\000\260\255\377\221\377\177\000\000\277\211\321UUU\000\000p\324\304UUU\000\000\002\000\000\000\000\000\000\000\240xh\367\377\177\000\000\000\000\000\000\000\000\000\000]\340iUUU\000\000p\274\016VUU\000\000\000\000\000\000\000\000\000\000\300\303iUUU\000\000p\206jUUU", '\000' <repeats 11 times>, "ihB鵿6\200\251!VUU\000\000"..., thread_func=...) at util/thread.cpp:21 #17 0x000055555569e05d in std::__invoke_impl<void, void (*)(std::basic_string_view<char>, std::function<void()>), char const*, CConnman::Start(CScheduler&, const Options&)::<lambda()> > (__f=<optimized out>) at /usr/include/c++/12/bits/invoke.h:61 #18 std::__invoke<void (*)(std::basic_string_view<char>, std::function<void()>), char const*, CConnman::Start(CScheduler&, const Options&)::<lambda()> > (__fn=<optimized out>) at /usr/include/c++/12/bits/invoke.h:96 #19 std::thread::_Invoker<std::tuple<void (*)(std::basic_string_view<char, std::char_traits<char> >, std::function<void()>), char const*, CConnman::Start(CScheduler&, const Options&)::<lambda()> > >::_M_invoke<0, 1, 2> (this=<optimized out>) at /usr/include/c++/12/bits/std_thread.h:252 #20 std::thread::_Invoker<std::tuple<void (*)(std::basic_string_view<char, std::char_traits<char> >, std::function<void()>), char const*, CConnman::Start(CScheduler&, const Options&)::<lambda()> > >::operator() (this=<optimized out>) at /usr/include/c++/12/bits/std_thread.h:259 #21 std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (*)(std::basic_string_view<char, std::char_traits<char> >, std::function<void()>), char const*, CConnman::Start(CScheduler&, const Options&)::<lambda()> > > >::_M_run(void) (this=<optimized out>) at /usr/include/c++/12/bits/std_thread.h:210 #22 0x00007ffff7ad43d3 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6 #23 0x00007ffff7687b27 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:435 #24 0x00007ffff770a78c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81 (gdb) ``` ACKs for top commit: MarcoFalke: review ACK e4be0e9 🏽 Tree-SHA512: d892d6264a284d952a68a8631a6301277373b8df939dafd9e2652f2f22ab60712cde63b90c27c67ea2d05f02443452e3e4e1b9f25479bfaca00d4c4de13b9fbd
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