chxj19 commented on issue #900: 如何在bthread_mutex_t死锁问题时查看bthread的堆栈 URL: https://github.com/apache/incubator-brpc/issues/900#issuecomment-525184422 昨天的没有了，我今天在同样的地方构造了死锁，但是今天的除了其中3个frame可以看到报错之外其他的frame都没有任何输出了。 下面有bthread_list的结果以及bthread_frame和bthread_meta的输出信息 ``` (gdb) bthread_list id tid function total:10 #0 4294969600 0x96ede0 <brpc::GlobalUpdate(void*)> #1 4294969601 0x8c6900 <mds::LBAGarbageProc::thread_fn(void*)> #2 4294969602 0xa2b660 <brpc::SocketMap::RunWatchConnections(void*)> #3 4294969603 0x96e850 <brpc::EventDispatcher::RunThis(void*)> #4 4294969604 0xa10940 <brpc::Server::UpdateDerivedVars(void*)> #5 12884904449 0xa1f2a0 <brpc::Socket::ProcessEvent(void*)> #6 8589941249 0x977510 <brpc::ProcessInputMessage(void*)> #7 4294973954 0x8eb770 <mds::SITCache::update_sit_container(void*)> #8 4294973957 0x977510 <brpc::ProcessInputMessage(void*)> #9 4294973958 0x977510 <brpc::ProcessInputMessage(void*)> (gdb) bthread_frame 0 Python Exception <class 'gdb.MemoryError'> Cannot access memory at address 0x100000007: Error occurred in Python command: Cannot access memory at address 0x100000007 (gdb) bthread_frame 1 (gdb) bthread_frame 2 Python Exception <class 'gdb.MemoryError'> Cannot access memory at address 0x8: Error occurred in Python command: Cannot access memory at address 0x8 (gdb) bthread_frame 3 Python Exception <class 'gdb.MemoryError'> Cannot access memory at address 0x8: Error occurred in Python command: Cannot access memory at address 0x8 (gdb) bthread_frame 4 (gdb) bthread_frame 5 (gdb) bthread_frame 6 (gdb) bthread_frame 7 (gdb) bthread_frame 8 (gdb) bthread_frame 9 (gdb) (gdb) bthread_meta 0 {current_waiter = {<std::atomic<bthread::ButexWaiter*>> = {_M_b = {_M_p = 0x0}}, <No data fields>}, current_sleep = 8589935890, stop = false, interrupted = false, about_to_quit = false, version_lock = 1, version_butex = 0x367c800, tid = 4294969600, fn = 0x96ede0 <brpc::GlobalUpdate(void*)>, arg = 0x0, stack = 0x34f0b00, attr = {stack_type = 3, flags = 0, keytable_pool = 0x0}, cpuwide_start_ns = 772045948636962, stat = {cputime_ns = 446514, nswitch = 18}, local_storage = {keytable = 0x0, assigned_data = 0x0, rpcz_parent_span = 0x0}} (gdb) bthread_meta 1 {current_waiter = {<std::atomic<bthread::ButexWaiter*>> = {_M_b = {_M_p = 0x0}}, <No data fields>}, current_sleep = 0, stop = false, interrupted = false, about_to_quit = false, version_lock = 1, version_butex = 0x367ca40, tid = 4294969601, fn = 0x8c6900 <mds::LBAGarbageProc::thread_fn(void*)>, arg = 0x344f5e8, stack = 0x34f0b28, attr = {stack_type = 3, flags = 0, keytable_pool = 0x0}, cpuwide_start_ns = 772045949769170, stat = {cputime_ns = 0, nswitch = 0}, local_storage = {keytable = 0x0, assigned_data = 0x0, rpcz_parent_span = 0x0}} (gdb) bthread_meta 2 {current_waiter = {<std::atomic<bthread::ButexWaiter*>> = {_M_b = {_M_p = 0x0}}, <No data fields>}, current_sleep = 8589936146, stop = false, interrupted = false, about_to_quit = false, version_lock = 1, version_butex = 0x367ca80, tid = 4294969602, fn = 0xa2b660 <brpc::SocketMap::RunWatchConnections(void*)>, arg = 0x32caa50, stack = 0x34f2c00, attr = {stack_type = 3, flags = 0, keytable_pool = 0x0}, cpuwide_start_ns = 772045951715982, stat = {cputime_ns = 209589, nswitch = 18}, local_storage = {keytable = 0x0, assigned_data = 0x0, rpcz_parent_span = 0x0}} (gdb) bthread_meta 3 {current_waiter = {<std::atomic<bthread::ButexWaiter*>> = {_M_b = {_M_p = 0x0}}, <No data fields>}, current_sleep = 0, stop = false, interrupted = false, about_to_quit = false, version_lock = 1, version_butex = 0x367d800, tid = 4294969603, fn = 0x96e850 <brpc::EventDispatcher::RunThis(void*)>, arg = 0x34f6208, stack = 0x3e8a000, attr = {stack_type = 3, flags = 0, keytable_pool = 0x0}, cpuwide_start_ns = 772045959472239, stat = {cputime_ns = 2857446521, nswitch = 7}, local_storage = {keytable = 0x0, assigned_data = 0x0, rpcz_parent_span = 0x0}} (gdb) bthread_meta 4 {current_waiter = {<std::atomic<bthread::ButexWaiter*>> = {_M_b = {_M_p = 0x0}}, <No data fields>}, current_sleep = 8589936402, stop = false, interrupted = false, about_to_quit = false, version_lock = 1, version_butex = 0x367d840, tid = 4294969604, fn = 0xa10940 <brpc::Server::UpdateDerivedVars(void*)>, arg = 0x7fffea07e680, stack = 0x3e90000, attr = {stack_type = 3, flags = 0, keytable_pool = 0x0}, cpuwide_start_ns = 772045959486570, stat = {cputime_ns = 7087921, nswitch = 18}, local_storage = {keytable = 0x0, assigned_data = 0x0, rpcz_parent_span = 0x0}} (gdb) bthread_meta 5 {current_waiter = {<std::atomic<bthread::ButexWaiter*>> = {_M_b = {_M_p = 0x7f8df213ce00}}, <No data fields>}, current_sleep = 0, stop = false, interrupted = false, about_to_quit = false, version_lock = 1, version_butex = 0x3ca41c0, tid = 4294974466, fn = 0x8eb770 <mds::SITCache::update_sit_container(void*)>, arg = 0x40e0ce0, stack = 0x3e94d00, attr = {stack_type = 3, flags = 0, keytable_pool = 0x0}, cpuwide_start_ns = 772048607359328, stat = {cputime_ns = 2741907, nswitch = 147}, local_storage = {keytable = 0x41a2a00, assigned_data = 0x0, rpcz_parent_span = 0x0}} (gdb) bthread_meta 6 {current_waiter = {<std::atomic<bthread::ButexWaiter*>> = {_M_b = {_M_p = 0x0}}, <No data fields>}, current_sleep = 0, stop = false, interrupted = false, about_to_quit = false, version_lock = 1, version_butex = 0x3ca6440, tid = 4294974721, fn = 0xa1f2a0 <brpc::Socket::ProcessEvent(void*)>, arg = 0x4022000, stack = 0x3e92128, attr = {stack_type = 3, flags = 0, keytable_pool = 0x34f69c0}, cpuwide_start_ns = 772048817406440, stat = {cputime_ns = 0, nswitch = 0}, local_storage = {keytable = 0x3b29d00, assigned_data = 0x0, rpcz_parent_span = 0x0}} (gdb) bthread_meta 7 {current_waiter = {<std::atomic<bthread::ButexWaiter*>> = {_M_b = {_M_p = 0x7f8df4d45ac0}}, <No data fields>}, current_sleep = 0, stop = false, interrupted = false, about_to_quit = false, version_lock = 1, version_butex = 0x3ca6480, tid = 4294974722, fn = 0x977510 <brpc::ProcessInputMessage(void*)>, arg = 0x4d00000, stack = 0x3e92c00, attr = {stack_type = 3, flags = 32, keytable_pool = 0x34f69c0}, cpuwide_start_ns = 772048817466559, stat = {cputime_ns = 52994, nswitch = 1}, local_storage = {keytable = 0x3b28700, assigned_data = 0x0, rpcz_parent_span = 0x0}} (gdb) bthread_meta 8 {current_waiter = {<std::atomic<bthread::ButexWaiter*>> = {_M_b = {_M_p = 0x0}}, <No data fields>}, current_sleep = 0, stop = false, interrupted = false, about_to_quit = false, version_lock = 1, version_butex = 0x3ca64c0, tid = 4294974723, fn = 0x977510 <brpc::ProcessInputMessage(void*)>, arg = 0x4d00080, stack = 0x3e92c28, attr = {stack_type = 3, flags = 32, keytable_pool = 0x34f69c0}, cpuwide_start_ns = 772048817468086, stat = {cputime_ns = 0, nswitch = 0}, local_storage = {keytable = 0x41a2f00, assigned_data = 0x0, rpcz_parent_span = 0x0}} (gdb) bthread_meta 9 {current_waiter = {<std::atomic<bthread::ButexWaiter*>> = {_M_b = {_M_p = 0x0}}, <No data fields>}, current_sleep = 0, stop = false, interrupted = false, about_to_quit = false, version_lock = 1, version_butex = 0x3ca6500, tid = 4294974724, fn = 0x977510 <brpc::ProcessInputMessage(void*)>, arg = 0x4d00100, stack = 0x3e8cc00, attr = {stack_type = 3, flags = 32, keytable_pool = 0x34f69c0}, cpuwide_start_ns = 772048817477545, stat = {cputime_ns = 0, nswitch = 0}, local_storage = {keytable = 0x3727800, assigned_data = 0x0, rpcz_parent_span = 0x0}} ```
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