[erlang-bugs] beam segfault

Ruan Jonker <>
Wed Oct 9 06:14:24 CEST 2013


Hi All,

Just some more info :


addr2line -e  /home/mtrouter/mira_mt_router/erts-5.8.5/bin/beam 0808f818
/home/erlang/src/otp_src_R14B04/erts/emulator/beam/erl_bestfit_alloc.c:228

BR

Ruan




On Tue, Oct 8, 2013 at 10:14 AM, Ruan Jonker <> wrote:

> Hi All,
>
> I've recently encountered the following in dmesg output after one of my
> VM's crashed:
>
> >>> dmesg output start
> [2827116.693283] beam[28297]: segfault at 0000000c eip 0808f818 esp
> bff7a294 error 4
> >>> dmesg output end
>
> Here is a disassembly of beam with some context around 808f818 :
>
> >>> disassembly start
>  808f7fa: 5f                    pop    %edi
>  808f7fb: c3                    ret
>  808f7fc: 8b 51 0c              mov    0xc(%ecx),%edx
>  808f7ff: 39 da                 cmp    %ebx,%edx
>  808f801: 0f 84 96 00 00 00     je     808f89d <tree_insert_fixup+0x11d>
>  808f807: 8b 43 08              mov    0x8(%ebx),%eax
>  808f80a: 8b 50 08              mov    0x8(%eax),%edx
>  808f80d: 83 60 04 fd           andl   $0xfffffffd,0x4(%eax)
>  808f811: 8b 4a 10              mov    0x10(%edx),%ecx
>  808f814: 83 4a 04 02           orl    $0x2,0x4(%edx)
>  808f818: 8b 41 0c              mov    0xc(%ecx),%eax
>  808f81b: 85 c0                 test   %eax,%eax
>  808f81d: 89 42 10              mov    %eax,0x10(%edx)
>  808f820: 74 03                 je     808f825 <tree_insert_fixup+0xa5>
>  808f822: 89 50 08              mov    %edx,0x8(%eax)
>  808f825: 8b 42 08              mov    0x8(%edx),%eax
>  808f828: 85 c0                 test   %eax,%eax
>  808f82a: 89 41 08              mov    %eax,0x8(%ecx)
>  808f82d: 74 6a                 je     808f899 <tree_insert_fixup+0x119>
>  808f82f: 8b 42 08              mov    0x8(%edx),%eax
>  808f832: 3b 50 0c              cmp    0xc(%eax),%edx
> >>> disassembly start
>
> ldd erts-5.8.5/bin/beam
> linux-gate.so.1 =>  (0xb76fe000)
> libutil.so.1 => /lib/tls/i686/cmov/libutil.so.1 (0xb76f2000)
>  libdl.so.2 => /lib/tls/i686/cmov/libdl.so.2 (0xb76ee000)
> libm.so.6 => /lib/tls/i686/cmov/libm.so.6 (0xb76c8000)
>  libncurses.so.5 => /lib/libncurses.so.5 (0xb7698000)
> libpthread.so.0 => /lib/tls/i686/cmov/libpthread.so.0 (0xb7680000)
>  librt.so.1 => /lib/tls/i686/cmov/librt.so.1 (0xb7677000)
> libc.so.6 => /lib/tls/i686/cmov/libc.so.6 (0xb7528000)
>  /lib/ld-linux.so.2 (0xb76ff000)
>
> I'm running R14B04 on ubuntu 8.04 32bit built using gcc:
>
> gcc -v
> Using built-in specs.
> Target: i486-linux-gnu
> Configured with: ../src/configure -v
> --enable-languages=c,c++,fortran,objc,obj-c++,treelang --prefix=/usr
> --enable-shared --with-system-zlib --libexecdir=/usr/lib
> --without-included-gettext --enable-threads=posix --enable-nls
> --with-gxx-include-dir=/usr/include/c++/4.2 --program-suffix=-4.2
> --enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc
> --enable-mpfr --enable-targets=all --enable-checking=release
> --build=i486-linux-gnu --host=i486-linux-gnu --target=i486-linux-gnu
> Thread model: posix
> gcc version 4.2.4 (Ubuntu 4.2.4-1ubuntu4)
>
>
> Has anybody seen something similar ?
>
> BR
>
> --
> Ruan Jonker
>



-- 
Ruan Jonker
South Africa
+27824619036
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