Hello, David. Patch on MultiThreadIO branch was help for me. Thank you very much!
P.S. I close only explicitly all sockets. ср, 26 дек. 2018 г. в 14:45, David Matthews <david.matth...@prolingua.co.uk>: > > I've had a look at this and I think I know what is going wrong. There > is a global table that holds information about open streams. There is > an interlock to prevent two threads both growing the table at the same > time but it turns out there is no interlock to prevent one thread > growing it while another thread is reading an entry. I've fixed this > and pushed some changes to a MultiThreadIO branch on GitHub. > > However, the table itself is really a relic of some very old code and > the whole thing needs to be replaced. The table does two things. One > is to ensure that streams are not persistent: i.e. if a stream is opened > and a reference to the stream is saved using PolyML.SaveState.saveState > or PolyML.export then any attempt to use it when the saved state is > reloaded will fail with an exception. The other use of the table is to > enable streams to be garbage-collected: i.e. if a stream is no longer > reachable then at some point the stream will be closed. > > Achieving non-persistence is easy as a result of some recent changes. > Garbaging-collecting streams is more difficult. Does anyone actually > rely on streams being garbage-collected? Would doing away with that and > requiring streams to be closed explicitly cause any problems? > > David > > On 24/12/2018 16:20, Kostirya wrote: > > Hello. > > I got sometimes Segmentation fault. > > The GDB backtrace of core file is bellow. > > It is multi thread server. I call Socket.bind and Socket.listen in > > main thread and then I create worker threads. > > If server have one worker thread then error is not occur. > > > > > > OS is CentOS, Poly/ML 5.7.2 Testing (Git version v5.7.1-161-g33045f8) > > > > #0 0x00007fbf878faa87 in get_stream(PolyWord) () > > from /home/nick/polyml/lib/libpolyml.so.9 > > #1 0x00007fbf878fac32 in writeArray(TaskData*, SaveVecEntry*, > > SaveVecEntry*, bool) [clone .isra.7] () from > > /home/nick/polyml/lib/libpolyml.so.9 > > #2 0x00007fbf878fc0be in IO_dispatch_c(TaskData*, SaveVecEntry*, > > SaveVecEntry*, SaveVecEntry*) () from > > /home/nick/polyml/lib/libpolyml.so.9 > > #3 0x00007fbf878fd2a1 in PolyBasicIOGeneral () > > from /home/nick/polyml/lib/libpolyml.so.9 > > #4 0x000000000041406d in area1 () > > #5 0x0000000000002001 in ?? () > > #6 0x00007fbf87b57320 in ?? () from /home/nick/polyml/lib/libpolyml.so.9 > > #7 0x00007fbf81e49e30 in ?? () > > #8 0x0000000000006001 in ?? () > > #9 0x0000000000010008 in ?? () > > #10 0x00007fbf879171ed in Processes::FindAllocationSpace(TaskData*, > > unsigned long, bool) () from /home/nick/polyml/lib/libpolyml.so.9 > > #11 0x00007fbf7c00a4d0 in ?? () > > #12 0x00007fbf81e4a660 in ?? () > > #13 0x00007fbf8792c9f1 in X86TaskData::SwitchToPoly() () > > from /home/nick/polyml/lib/libpolyml.so.9 > > #14 0x00007fbf8792cbcc in X86TaskData::EnterPolyCode() () > > from /home/nick/polyml/lib/libpolyml.so.9 > > #15 0x00007fbf87916fc9 in NewThreadFunction(void*) () > > > > > > ============================================================== > > > > This one more backtrace. > > > > #0 0x00007ff5a378ba87 in get_stream(PolyWord) () > > from /home/nick/polyml/lib/libpolyml.so.9 > > #1 0x00007ff5a379ef08 in getSelectResult(TaskData*, SaveVecEntry*, > > int, WaitSelect*) () from /home/nick/polyml/lib/libpolyml.so.9 > > #2 0x00007ff5a379f481 in selectCall(TaskData*, SaveVecEntry*, int) () > > from /home/nick/polyml/lib/libpolyml.so.9 > > #3 0x00007ff5a37a03ed in Net_dispatch_c(TaskData*, SaveVecEntry*, > > SaveVecEntry*) () from /home/nick/polyml/lib/libpolyml.so.9 > > #4 0x00007ff5a37a12f7 in PolyNetworkGeneral () > > from /home/nick/polyml/lib/libpolyml.so.9 > > #5 0x00000000004078a2 in area1 () > > #6 0x0000000000002001 in ?? () > > #7 0x00007ff5a39e8320 in ?? () from /home/nick/polyml/lib/libpolyml.so.9 > > #8 0x00007ff59d4d9e30 in ?? () > > #9 0x000000000000a001 in ?? () > > #10 0x0000000000010008 in ?? () > > #11 0x00007ff5a37a81ed in Processes::FindAllocationSpace(TaskData*, > > unsigned long, bool) () from /home/nick/polyml/lib/libpolyml.so.9 > > #12 0x00007ff59800c980 in ?? () > > #13 0x00007ff59d4da660 in ?? () > > #14 0x00007ff5a37bd9f1 in X86TaskData::SwitchToPoly() () > > from /home/nick/polyml/lib/libpolyml.so.9 > > #15 0x00007ff5a37bdbcc in X86TaskData::EnterPolyCode() () > > ---Type <return> to continue, or q <return> to quit--- > > from /home/nick/polyml/lib/libpolyml.so.9 > > #16 0x00007ff5a37a7fc9 in NewThreadFunction(void*) () > > from /home/nick/polyml/lib/libpolyml.so.9 > > #17 0x00007ff5a2968e25 in start_thread () from /lib64/libpthread.so.0 > > #18 0x00007ff5a2c7534d in clone () from /lib64/libc.so.6 > > > > > > ============================================================== > > > > This one more backtrace. > > > > > > #0 0x00007f88d2be3a87 in get_stream(PolyWord) () from > > /home/nick/polyml/lib/libpolyml.so.9 > > #1 0x00007f88d2be5b85 in IO_dispatch_c(TaskData*, SaveVecEntry*, > > SaveVecEntry*, SaveVecEntry*) () > > from /home/nick/polyml/lib/libpolyml.so.9 > > #2 0x00007f88d2be62a1 in PolyBasicIOGeneral () from > > /home/nick/polyml/lib/libpolyml.so.9 > > #3 0x000000000040580d in area1 () > > #4 0x0000000000002001 in ?? () > > #5 0x00007f88d2e40320 in ?? () from /home/nick/polyml/lib/libpolyml.so.9 > > #6 0x00007f88cc931e30 in ?? () > > #7 0x000000000000a001 in ?? () > > #8 0x0000000000010008 in ?? () > > #9 0x00007f88d2c001ed in Processes::FindAllocationSpace(TaskData*, > > unsigned long, bool) () from /home/nick/polyml/lib/libpolyml.so.9 > > #10 0x00007f88c800c980 in ?? () > > #11 0x00007f88cc932660 in ?? () > > #12 0x00007f88d2c159f1 in X86TaskData::SwitchToPoly() () from > > /home/nick/polyml/lib/libpolyml.so.9 > > #13 0x00007f88d2c15bcc in X86TaskData::EnterPolyCode() () from > > /home/nick/polyml/lib/libpolyml.so.9 > > #14 0x00007f88d2bfffc9 in NewThreadFunction(void*) () from > > /home/nick/polyml/lib/libpolyml.so.9 > > #15 0x00007f88d1dc0e25 in start_thread () from /lib64/libpthread.so.0 > > #16 0x00007f88d20cd34d in clone () from /lib64/libc.so.6 > > > > > > ===================================================================== > > > > This one more backtrace. > > > > > > #0 0x00007f1ed86fca87 in get_stream(PolyWord) () > > from /home/nick/polyml/lib/libpolyml.so.9 > > #1 0x00007f1ed8710209 in selectCall(TaskData*, SaveVecEntry*, int) () > > from /home/nick/polyml/lib/libpolyml.so.9 > > #2 0x00007f1ed87113ed in Net_dispatch_c(TaskData*, SaveVecEntry*, > > SaveVecEntry*) () from /home/nick/polyml/lib/libpolyml.so.9 > > #3 0x00007f1ed87122f7 in PolyNetworkGeneral () > > from /home/nick/polyml/lib/libpolyml.so.9 > > #4 0x00000000004078a2 in area1 () > > #5 0x0000000000002001 in ?? () > > #6 0x00007f1ed8959320 in ?? () from /home/nick/polyml/lib/libpolyml.so.9 > > #7 0x00007f1ecdffae30 in ?? () > > #8 0x000000000000a001 in ?? () > > #9 0x0000000000010008 in ?? () > > #10 0x00007f1ed87191ed in Processes::FindAllocationSpace(TaskData*, > > unsigned long, bool) () from /home/nick/polyml/lib/libpolyml.so.9 > > #11 0x00007f1ed000c980 in ?? () > > #12 0x00007f1ecdffb660 in ?? () > > #13 0x00007f1ed872e9f1 in X86TaskData::SwitchToPoly() () > > from /home/nick/polyml/lib/libpolyml.so.9 > > #14 0x00007f1ed872ebcc in X86TaskData::EnterPolyCode() () > > from /home/nick/polyml/lib/libpolyml.so.9 > > #15 0x00007f1ed8718fc9 in NewThreadFunction(void*) () > > _______________________________________________ > > polyml mailing list > > polyml@inf.ed.ac.uk > > http://lists.inf.ed.ac.uk/mailman/listinfo/polyml > > _______________________________________________ polyml mailing list polyml@inf.ed.ac.uk http://lists.inf.ed.ac.uk/mailman/listinfo/polyml
