Hi, I have done something along those lines a while back for *nix. If libunwind is available at build time then this code will print a gdb-style backtrace on abort:
https://github.com/zeromq/libzmq/blob/master/src/err.cpp#L391 Need to be careful with core dumps and backtraces as they might expose private data about proprietary applications, so it should be opt-in to avoid nasty surprises for enterprise users and the like. But I don't see any problem in principle, as long as it's a well-documented opt-in. On Thu, 2016-11-24 at 08:40 +0000, Auer, Jens wrote: > Hi, > > Thinking about it, I may change my mind. It may be interesting to be able to > generate a core dump (mini dump) in the zmq_assert statements if it can be > switched on or off, e.g. by a define or even context property. I think this > would help finding issues in ZeroMQ. > > Cheers, > Jens > > -- > Dr. Jens Auer | CGI | Software Engineer > CGI Deutschland Ltd. & Co. KG > Rheinstraße 95 | 64295 Darmstadt | Germany > T: +49 6151 36860 154 > jens.a...@cgi.com<mailto:jens.a...@cgi.com> > Unsere Pflichtangaben gemäß § 35a GmbHG / §§ 161, 125a HGB finden Sie unter > de.cgi.com/pflichtangaben<http://de.cgi.com/pflichtangaben>. > > CONFIDENTIALITY NOTICE: Proprietary/Confidential information belonging to CGI > Group Inc. and its affiliates may be contained in this message. If you are > not a recipient indicated or intended in this message (or responsible for > delivery of this message to such person), or you think for any reason that > this message may have been addressed to you in error, you may not use or copy > or deliver this message to anyone else. In such case, you should destroy this > message and are asked to notify the sender by reply e-mail. > > From: zeromq-dev [mailto:zeromq-dev-boun...@lists.zeromq.org] On Behalf Of > Auer, Jens > Sent: 23 November 2016 14:17 > To: ZeroMQ development list > Subject: Re: [zeromq-dev] SEHException 0x80004005 from ZeroMQ/libzmq > > Hi, > > I had a similar experience when I included crashrpt to a Windows application > I was working on. It greatly increases the ability to fix bugs, discuss > priorities and fight the “the software is getting worse with every release” > flames from other people. > > However, I don’t think this should be included in ZeroMQ. ZeroMQ is a library > that application developer use, and the same developer must decide if a crash > reporter should be used or not. > > Cheers, > Jens > > -- > Dr. Jens Auer | CGI | Software Engineer > CGI Deutschland Ltd. & Co. KG > Rheinstraße 95 | 64295 Darmstadt | Germany > T: +49 6151 36860 154 > jens.a...@cgi.com<mailto:jens.a...@cgi.com> > Unsere Pflichtangaben gemäß § 35a GmbHG / §§ 161, 125a HGB finden Sie unter > de.cgi.com/pflichtangaben<http://de.cgi.com/pflichtangaben>. > > CONFIDENTIALITY NOTICE: Proprietary/Confidential information belonging to CGI > Group Inc. and its affiliates may be contained in this message. If you are > not a recipient indicated or intended in this message (or responsible for > delivery of this message to such person), or you think for any reason that > this message may have been addressed to you in error, you may not use or copy > or deliver this message to anyone else. In such case, you should destroy this > message and are asked to notify the sender by reply e-mail. > > From: zeromq-dev [mailto:zeromq-dev-boun...@lists.zeromq.org] On Behalf Of > Osiris Pedroso > Sent: 23 November 2016 11:39 > To: zeromq-dev@lists.zeromq.org<mailto:zeromq-dev@lists.zeromq.org> > Subject: Re: [zeromq-dev] SEHException 0x80004005 from ZeroMQ/libzmq > > I know how to generate minidumps in Windows and create a small (~20Kb) file > that would have a snapshot of the stack and lots of other goodies. > To access it, one opens the generated .DMP file with "WinDBG.exe -k > minidump.dmp", enter the command ".ecxr" then "kvn" to see stack at the > failure point in time. > If PDB symbol files for the correct version of the DLLs being used are > available at their build locations, the "kvn" command will even tell you the > source file and line number where the exception happened and you will be able > to see local variable values for the functions on the stack by typing "dv" in > WinDBG for each stack frame. > > Obviously this is Windows only functionality. > > Earlier in the year I made a contribution to documentation of ZeroMQ using a > .DOC file and I felt shunned by the community when my PR was denied because > it used a Windows document format. > I even offered to format the same file as PDF, because the important thing > was the information it contained, not the format, to no avail. > At the time, (and even now) it felt to me like a betrayal of the C4 tenets, > but lets not get into religious wars here. > > I can tell you that in my professional work, I have brought down my company's > main product from 10 crashes/DAY/user to 0.5 crashes/MONTH/user by iterating > on generating these minidumps, asking the users to send them in, analyzing > them and fixing the problems they brought to our attention, so this is proven > technology. > > If the community feels that this is a good idea (add a Windows specific code > to generate minidumps when exceptions happen), I would love to invest the > time to this effort. > > > On Mon, Nov 14, 2016 at 1:30 PM Aaron Friesen > <afrie...@spirae.com<mailto:afrie...@spirae.com>> wrote: > All, > > Getting an SEHException 0x80004005 from ZeroMQ (4.1.0.21) / libzmq (4.1.5.0) > > Multiple processes went down with the same exception at the same time. > > Was not able to get a dump but the application logs showed the following > stack trace: > > System.Exception System.Runtime.InteropServices.SEHException (0x80004005): > External component has thrown an exception. > at ZeroMQ.lib.zmq.zmq_msg_send(IntPtr msg, IntPtr socket, Int32 flags) > at ZeroMQ.ZSocket.SendFrame(ZFrame frame, ZSocketFlags flags, ZError& error) > at ZeroMQ.ZSocket.SendFrames(IEnumerable`1 frames, Int32& sent, ZSocketFlags > flags, ZError& error) > at ZeroMQ.ZSocket.SendFrames(IEnumerable`1 frames, ZSocketFlags flags, > ZError& error) > at ZeroMQ.ZSocket.SendMessage(ZMessage msg, ZSocketFlags flags, ZError& error) > at ZeroMQ.ZSocket.SendMessage(ZMessage msg, ZSocketFlags flags) > at ZeroMQ.ZSocket.SendMessage(ZMessage msg) > at xxxxxx.SocketsThread(Object eventWaitHandle) > > No line numbers available, but based on the logged message, it would have > occurred in the following code. Because the stack trace does not include any > of the calls within the try block (PollIn, ProcessRequest, > ProcessSubscription), I am at a loss as to what exactly was executing at the > time of the exception that was calling SendMessage. > > Does anyone have any ideas as to what I might be doing wrong, or what the > problem might be and how to avoid it? > > > > ZSocket[] sockets = new ZSocket[] { _requestSocket, > _subscriberSocket }; > ZPollItem[] pollItems = new ZPollItem[] { > ZPollItem.CreateReceiver(), ZPollItem.CreateReceiver() }; > ZMessage[] messages = null; > > try > { > TimeSpan timeout = TimeSpan.FromMilliseconds(100); > > while (_run) > { > if (ZPollItems.PollIn(sockets, pollItems, out > messages, out error, timeout)) > { > if (error == ZError.EAGAIN) > continue; > > if (error == ZError.ETERM) > break; > > if (messages == null) > continue; > > if (messages[0] != null) // Request > ProcessRequest(messages[0]); > > if (messages[1] != null) // Subscription > ProcessSubscription(messages[1]); > } > else > { > if (error == ZError.EAGAIN) > continue; > > if (error != ZError.None) > break; > } > } > } > catch (Exception ex) > { > if (!(ex is ThreadAbortException)) > { > _logger.FatalException(string.Format("Exception > encountered while polling for messages on sockets. Thread '{0}' shutting > down.", threadName), ex); > > Environment.Exit(-1); > } > } > > Thank you in advance, > > Aaron Friesen > > _______________________________________________ > zeromq-dev mailing list > zeromq-dev@lists.zeromq.org<mailto:zeromq-dev@lists.zeromq.org> > http://lists.zeromq.org/mailman/listinfo/zeromq-dev > _______________________________________________ > zeromq-dev mailing list > zeromq-dev@lists.zeromq.org > http://lists.zeromq.org/mailman/listinfo/zeromq-dev -- Kind regards, Luca Boccassi
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