Hello all I'm currently playing with NativeBoost (a great thing to have) and pharo consistently crashes after running for a while. My impression is that crashes happen during GCs as if something moves under the installed callback. This may be also related to the libpcap itself, but how can I know for sure. I've tried everything newest (vm+image+libpcap) and I also migrated into a much more rigid scheme of storing and passing callback. Now I've run of ideas where to look further. So, it is like this. NBPCapHandlerCallback is a procedure which is called by libpcap for every packet it has in its internal buffer after the application calls pcap_dispatch(). pcap_dispatch receives the callback as a parameter. I have to repeatedly call pcap_dispatch in so called nonblocking mode (and pass the callback each time) every 5 milliseconds to collect packets - we are single threaded. This amounts to awful whole 200 callback installations per second, may be libpcap was not well tested in this scenario (I suppose pcap_loop runs in separated thread in wireshark and callback installation happens several times per session at most) - hence my doubts. But also - could it be something with NB? Any hints how to proceed with it are greatly appreciated. This is amazing how one can quickly assemble something that emulates thousands of dhcp-clients (this is what the app does) with current Pharo. But the thing dies off after 10-15 minutes. best wishes, Danil http://www.tcpdump.org/manpages/pcap_loop.3pcap.html ========= Generic failure NBNativeCodeGen class>>signalError: NBNativeCodeGen class>>handleFailureIn:nativeCode: NBNativeCodeGen class>>methodAssembly: LargePositiveInteger(NBFFICallback)>>primLeave:stackPtr:contextOop:returnValue:primitiveMethod: NBPCapHandlerCallback(NBFFICallback)>>pvtEnter:stackPointer:primitiveMethod: in Block: Segmentation fault Wed Feb 12 16:17:25 2014 pharo VM version: 3.9-7 #1 Fri Feb 7 16:55:52 CET 2014 gcc 4.6.3 [Production ITHB VM] Built from: NBCoInterpreter NativeBoost-CogPlugin-GuillermoPolito.19 uuid: acc98e51-2fba-4841-a965-2975997bba66 Feb 7 2014 With: NBCogit NativeBoost-CogPlugin-GuillermoPolito.19 uuid: acc98e51-2fba-4841-a965-2975997bba66 Feb 7 2014 Revision: https://github.com/pharo-project/pharo-vm.git Commit: ef5832e6f70e5b24e8b9b1f4b8509a62b6c88040 Date: 2014-01-26 15:34:28 +0100 By: Esteban Lorenzano <estebanlm@gmail.com> Jenkins build #14797 Build host: Linux pharo-linux 3.2.0-31-generic-pae #50-Ubuntu SMP Fri Sep 7 16:39:45 UTC 2012 i686 i686 i386 GNU/Linux plugin path: /home/Pharo/ [default: /home/Pharo/] C stack backtrace: ./pharo[0x809bc4c] ./pharo[0x809bf66] linux-gate.so.1(__kernel_rt_sigreturn+0x0)[0xb76e640c] ./pharo(incrementalGC+0x18a)[0x80859da] ./pharo[0x808655a] ./pharo[0x808cbb7] ./pharo[0x808ccba] ./pharo(ceStackOverflow+0x59)[0x808f5f9] [0x770f5260] [0x771017e0] [0x770fb11e] [0x770fa939] [0x770f9813] [0x770f5700] [0x770f55c0] Smalltalk stack dump: 0xbf8b6144 M BlockClosure>ensure: 0x7c429d44: a(n) BlockClosure 0xbf8b6164 M Semaphore>critical: 0x772901d8: a(n) Semaphore 0xbf8b6180 M SmallInteger(Integer)>atRandom 0x13=9 0xbf8b61a8 M NLDHCPClientInit>enter 0x7c3be76c: a(n) NLDHCPClientInit 0xbf8b61c0 M [] in NLDHCPHost>changeStateTo: 0x793e816c: a(n) NLDHCPHost 0xbf8b61e0 I [] in BlockClosure>newProcess 0x7c3be828: a(n) BlockClosure Most recent primitives at:put: at:put: at:put: at:put: basicNew: basicNew class class replaceFrom:to:with:startingAt: basicNew: basicNew class class replaceFrom:to:with:startingAt: species species at:put: at:put: class class replaceFrom:to:with:startingAt: species species at:put: at:put: class class replaceFrom:to:with:startingAt: at:put: species basicNew: replaceFrom:to:with:startingAt: class class species basicNew: replaceFrom:to:with:startingAt: replaceFrom:to:with:startingAt: basicNew: atAllPut: class class replaceFrom:to:with:startingAt: species basicNew: replaceFrom:to:with:startingAt: at:put: at:put: class at:put: at:put: at:put: species basicNew: replaceFrom:to:with:startingAt: species basicNew: replaceFrom:to:with:startingAt: basicNew: basicNew class class replaceFrom:to:with:startingAt: class class species basicNew: replaceFrom:to:with:startingAt: replaceFrom:to:with:startingAt: species basicNew: replaceFrom:to:with:startingAt: basicNew: basicNew class class replaceFrom:to:with:startingAt: class class replaceFrom:to:with:startingAt: class class replaceFrom:to:with:startingAt: basicNew: at:put: at:put: class class replaceFrom:to:with:startingAt: class class replaceFrom:to:with:startingAt: class class replaceFrom:to:with:startingAt: species basicNew: replaceFrom:to:with:startingAt: new at:put: at:put: class stringHash:initialHash: class stringHash:initialHash: class stringHash:initialHash: basicNew objectAt: basicNew: stackp: basicNew primitiveResume basicNew basicNew new: basicNew new: objectAt: basicNew: stackp: basicNew primitiveResume findNextUnwindContextUpTo: terminateTo: suspend species basicNew: replaceFrom:to:with:startingAt: species species class class basicNew shallowCopy shallowCopy basicNew: basicNew species basicNew: replaceFrom:to:with:startingAt: class class replaceFrom:to:with:startingAt: species basicNew: replaceFrom:to:with:startingAt: species basicNew: replaceFrom:to:with:startingAt: replaceFrom:to:with:startingAt: basicNew: basicNew species basicNew: replaceFrom:to:with:startingAt: class class replaceFrom:to:with:startingAt: species basicNew: replaceFrom:to:with:startingAt: species basicNew: replaceFrom:to:with:startingAt: replaceFrom:to:with:startingAt: replaceFrom:to:with:startingAt: wait truncated truncated signal at:put: at:put: at:put: at:put: at:put: at:put: new at:put: at:put: class at:put: at:put: class stringHash:initialHash: class stringHash:initialHash: class stringHash:initialHash: class stringHash:initialHash: class stringHash:initialHash: class stringHash:initialHash: species basicNew: replaceFrom:to:with:startingAt: species basicNew: replaceFrom:to:with:startingAt: species basicNew: replaceFrom:to:with:startingAt: species basicNew: replaceFrom:to:with:startingAt: class species hashBytes:startingWith: species species class class class stringHash:initialHash: class stringHash:initialHash: class stringHash:initialHash: basicNew: basicNew class class replaceFrom:to:with:startingAt: basicNew: basicNew class class replaceFrom:to:with:startingAt: class class species basicNew: replaceFrom:to:with:startingAt: replaceFrom:to:with:startingAt: species basicNew: replaceFrom:to:with:startingAt: class class species basicNew: replaceFrom:to:with:startingAt: replaceFrom:to:with:startingAt: species basicNew: replaceFrom:to:with:startingAt: pcapSendPacket:size: findNextUnwindContextUpTo: terminateTo: suspend basicNew basicNew wait **IncrementalGC** stack page bytes 4096 available headroom 3300 minimum unused headroom 3480 (Segmentation fault)