[Vm-dev] Crash with the new compactor on 64-bit linux

[Eliot Miranda]

Hi Levente, Hi All,

On Mon, Feb 27, 2017 at 7:52 AM, Levente Uzonyi <leves at caesar.elte.hu>
wrote:

>
> Hi All,
>
> I've been seeing random crashes with the VM having the new compactor. It
> takes anywhere between 5 mintues to a few hours for the crash to happen.
> The crash dumps didn't seem to contain relevant information and sometimes
> had no C call stack at all.
> So I decided to run the VM with gdb to catch the bug, and got the
> following:
>
> Program received signal SIGSEGV, Segmentation fault.
> lookupOrdinaryNoMNUEtcInClass (class=0) at /home/travis/build/OpenSmallta
> lk/opensmalltalk-vm/spur64src/vm/gcc3x-cointerp.c:68119
> 68119   /home/travis/build/OpenSmalltalk/opensmalltalk-vm/spur64src/vm/gcc3x-cointerp.c:
> No such file or directory.
> (gdb) bt
> #0  lookupOrdinaryNoMNUEtcInClass (class=0) at
> /home/travis/build/OpenSmalltalk/opensmalltalk-vm/spur64src/
> vm/gcc3x-cointerp.c:68119
> #1  0x000000000043fd97 in lookupOrdinaryreceiver (selector=21887312,
> rcvr=<optimized out>) at /home/travis/build/OpenSmallta
> lk/opensmalltalk-vm/spur64src/vm/gcc3x-cointerp.c:19195
> #2  0x000000000048f128 in ceSICMiss (receiver=14637768) at
> /home/travis/build/OpenSmalltalk/opensmalltalk-vm/spur64src/
> vm/cogitX64.c:3232
> #3  0x0000000000900461 in ?? ()
> #4  0x00007ffffff98c51 in ?? ()
> #5  0x000000000045af68 in interpret () at /home/travis/build/OpenSmallta
> lk/opensmalltalk-vm/spur64src/vm/gcc3x-cointerp.c:2650
> #6  0x0000000000901010 in ?? ()
> #7  0x0000000000df5ac8 in ?? ()
> #8  0x0000000000df5780 in ?? ()
> #9  0x0000000000df6da8 in ?? ()
> #10 0x0000000000df6fe8 in ?? ()
> #11 0x0000000000000000 in ?? ()
> (gdb) info registers
> rax            0x0      0
> rbx            0x2e78e0 3045600
> rcx            0x0      0
> rdx            0x12e78e0        19822816
> rsi            0x2e78e0 3045600
> rdi            0x0      0
> rbp            0x14df950        0x14df950
> rsp            0x7ffffff98b60   0x7ffffff98b60
> r8             0xffffffffffffffff       -1
> r9             0x2      2
> r10            0x7ffffffaac00   140737488006144
> r11            0xa087df 10520543
> r12            0x14df950        21887312
> r13            0xa087ef 10520559
> r14            0x15903f0        22610928
> r15            0x12e78e0        19822816
> rip            0x43f9b6 0x43f9b6 <lookupOrdinaryNoMNUEtcInClass+38>
> eflags         0x10283  [ CF SF IF RF ]
> cs             0x33     51
> ss             0x2b     43
> ds             0x0      0
> es             0x0      0
> fs             0x0      0
> gs             0x0      0
>
> I obviously didn't have any source files at those paths, but the line
> numbers may still be of help.
> The VM was cog_linux64x64_squeak.cog.spur_201702211732 from Travis with
> the plugins copied over from some previous version, because, as I mentioned
> it in another mail, newer builds come with no plugins at all.


Next time can you include the info in the crash dump or the output of
-version?  It's much more informative.  It looks like this:

spur64cfvm -version
/Users/eliot/oscogvm/build.macos64x64/squeak.cog.spur/CocoaFast.app/Contents/MacOS/Squeak
5.0 5.0.201702250108 Mac OS X built on Feb 24 2017 17:17:00 PST Compiler:
4.2.1 Compatible Apple LLVM 7.0.0 (clang-700.1.76) [Production Spur 64-bit
VM]
CoInterpreter VMMaker.oscog-eem.2138 uuid:
8b98184c-9061-45e1-b4ce-bd9b8bc8c802 Feb 24 2017
StackToRegisterMappingCogit VMMaker.oscog-eem.2139 uuid:
a905d032-fb67-4132-a5bf-5d59e668f2e5 Feb 24 2017
VM: 201702250108 eliot at Sisyphus:oscogvm $ Date: Fri Feb 24 17:08:29 2017
-0800 $
Plugins: 201702250108 eliot at Sisyphus:oscogvm $

excerpt from crash.mp:
Segmentation fault Tue Jan 17 10:39:18 2017


/scratch/bwesterg/vmwork/vm/products/nscogspurlinux/lib/nsvm/5.0-201701142054/nsvm
Newspeak VM version: 5.0-201701142054  Tue Jan 17 10:31:43 PST 2017 gcc
4.8.3 [Production Spur ITHB VM]
Built from: CoInterpreter VMMaker.oscogSPP-eem.2091 uuid:
8df2d889-5c88-4a52-b3f4-c94b29b0ef80 Jan 17 2017
With: StackToRegisterMappingCogit VMMaker.oscog-eem.2082 uuid:
f987e1db-f4c0-40ed-86ec-7a478cb89067 Jan 17 2017
Revision: VM: 201701142054 bwesterg at epoxy:/scratch/bwesterg/vmwork/vm $
Date: Sat Jan 14 12:54:19 2017 -0800 $
Plugins: 201701142054 bwesterg at epoxy:/scratch/bwesterg/vmwork/vm $
Build host: Linux epoxy 2.6.18-194.el5 #1 SMP Tue Mar 16 21:52:39 EDT 2010
i686 i686 i386 GNU/Linux
plugin path: ../vm/products/nscogspurlinux/lib/nsvm/5.0-201701142054
[default:
/scratch/bwesterg/vmwork/vm/products/nscogspurlinux/lib/nsvm/5.0-201701142054/]

Thanks!
_,,,^..^,,,_
best, Eliot
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