[Vm-dev] Re: [Pharo-dev] need some help with NBCallback related
crashes
Eliot Miranda
eliot.miranda at gmail.com
Thu Feb 13 19:57:14 UTC 2014
cc'ing vm-dev cuz /this is a vm-dev issue/.
On Wed, Feb 12, 2014 at 4:40 AM, Danil Osipchuk <danil.osipchuk at gmail.com>wrote:
> 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.
>
There is a leak checker in the VM that you can use. Use -leakcheck 3 to
run the leak checker before each full GC (1) and incremental GC (2, 1 + 2 =
3). Use -leakcheck 7 to run it before each become as well. This should at
least print an error before the crash. If you then use gdb to stop in the
warning function you can use facilities such as printOop to find out which
object is crapping out.
HTH
and please bring issues like this up on vm-dev.
>
>
> 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 at 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)
>
>
--
best,
Eliot
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