On Mon, Sep 3, 2012 at 7:28 PM, Sedat Dilek <[email protected]> wrote: > On Mon, Sep 3, 2012 at 12:50 PM, Petr Machata <[email protected]> wrote: >> Sedat Dilek <[email protected]> writes: >> >>> as promised here my first impressions on ltrace v0.7.0-git on my >>> MIPSEL router. >> >> Thank you for this. I'm trying to install Debian Wheezy on emulated >> MIPS64el as I write this, but it takes ages to finish. >> >>> I have built ltrace statically against libelf-0.8.13, >>> libstdc++.so.6.0.16 and etc.(see attached patch). >>> >>> Then, I uploaded ltrace binary together with upstream's ltrace.conf to >>> /var/tmp/{etc}. >>> >>> Unfortunately, ltrace fails when tracing running daemons or ELF >>> binaries. >> >> Daemons could be PIE (position independent) binaries, those are not >> supported by ltrace. >> >>> I played a bit with --debug=LEVEL... I could see that the new config >>> is used (required!) but using other parameters flooded here my box. >>> Can you help with debugging? >> >> The config itself is only interesting for formatting displayed library >> calls. You could just pass -F /dev/null. (But it doesn't hurt if the >> file is there.) >> >>> root@fritz:/# cat /proc/version >>> Linux version 2.6.13.1-ohio () (gcc version 3.4.6) #1 Tue Mar 27 >>> 16:53:06 CEST 2012 >>> >>> root@fritz:/# cat /proc/cpuinfo >>> system type : MIPS OHIO >>> processor : 0 >>> cpu model : MIPS 4KEc V4.8 >>> BogoMIPS : 211.35 >>> wait instruction : yes >>> microsecond timers : yes >>> tlb_entries : 16 >>> extra interrupt vector : yes >>> hardware watchpoint : yes >>> VCED exceptions : not available >>> VCEI exceptions : not available >>> >>> [ Start ltrace session ] >>> >>> root@fritz:/# ls -l /var/tmp/ltrace /var/tmp/etc/ltrace.conf >>> -rw-r--r-- 1 root root 15598 Sep 2 15:49 >>> /var/tmp/etc/ltrace.conf >>> -rwxr-xr-x 1 root root 297220 Sep 2 15:49 /var/tmp/ltrace >>> >>> root@fritz:/# ldd /var/tmp/ltrace >>> not a dynamic executable >>> >>> root@fritz:/# /var/tmp/ltrace --version >>> ltrace version 0.7.0-git. >>> Copyright (C) 1997-2009 Juan Cespedes <[email protected]>. >>> This is free software; see the GNU General Public Licence >>> version 2 or later for copying conditions. There is NO warranty. >>> >>> root@fritz:/# ps w | grep d[s]ld >>> 621 root 0 RWN [kdsld_token] >>> 575 root 4000 S dsld -g -i -n >>> >>> root@fritz:/# /var/tmp/ltrace --config=/var/tmp/etc/ltrace.conf -p $(pidof >>> dsld) >>> --- SIGSTOP (Stopped (signal)) --- >>> --- SIGSTOP (Stopped (signal)) --- >>> >>> root@fritz:/# /var/tmp/ltrace --config=/var/tmp/etc/ltrace.conf >>> /sbin/dsltest >>> unexpected breakpoint at 0x2acaf3d8 >>> unexpected breakpoint at 0x2acaf3d8 >>> unexpected breakpoint at 0x2acaf3d8 >>> unexpected breakpoint at 0x2acaf3d8 >>> unexpected breakpoint at 0x2acaf3d8 >>> unexpected breakpoint at 0x2acaf3d8 >>> unexpected breakpoint at 0x2acaf3d8 >>> unexpected breakpoint at 0x2acaf3d8 >>> unexpected breakpoint at 0x2acaf3d8 >>> unexpected breakpoint at 0x2acaf3d8 >>> unexpected breakpoint at 0x2acaf3d8 >>> unexpected breakpoint at 0x2acaf3d8 >>> +++ exited (status 3) +++ >> >> Could you compile a trivial binary and see if that happens to work? As >> in: >> >> $ echo 'int main() { puts("blah"); }' | gcc -x c - >> $ ltrace ./a.out >> > > Here we go... > > [ Build-Host ] > > $ > ./toolchain/build/mipsel_gcc-4.6.3_uClibc-0.9.32.1/mipsel-linux-uclibc/bin/mipsel-linux-uclibc-gcc > -v > Using built-in specs. > COLLECT_GCC=./toolchain/build/mipsel_gcc-4.6.3_uClibc-0.9.32.1/mipsel-linux-uclibc/bin/mipsel-linux-uclibc-gcc > COLLECT_LTO_WRAPPER=/home/wearefam/src/freetz/freetz-git/toolchain/build/mipsel_gcc-4.6.3_uClibc-0.9.32.1/mipsel-linux-uclibc/bin/../libexec/gcc/mipsel-linux-uclibc/4.6.3/lto-wrapper > Target: mipsel-linux-uclibc > Configured with: > /home/cam/freetz/source/toolchain-mipsel_gcc-4.6.3_uClibc-0.9.32.1/gcc-4.6.3/configure > --prefix=/home/cam/freetz/toolchain/build/mipsel_gcc-4.6.3_uClibc-0.9.32.1/mipsel-linux-uclibc > --with-sysroot=/home/cam/freetz/toolchain/build/mipsel_gcc-4.6.3_uClibc-0.9.32.1/mipsel-linux-uclibc/usr/ > --build=i386-pc-linux-gnu --host=i386-pc-linux-gnu > --target=mipsel-linux-uclibc --enable-languages=c,c++ --enable-shared > --enable-threads --with-gmp=/home/cam/freetz/tools/build > --with-mpfr=/home/cam/freetz/tools/build > --with-mpc=/home/cam/freetz/tools/build --with-gnu-ld > --disable-__cxa_atexit --disable-libgomp --disable-libmudflap > --disable-multilib --disable-tls --disable-fixed-point > --with-float=soft --enable-cxx-flags=-msoft-float --disable-libssp > --with-march=4kc --disable-nls --with-mips-plt --disable-decimal-float > Thread model: posix > gcc version 4.6.3 (GCC) > > $ echo 'int main() { puts("blah"); }' | > ./toolchain/build/mipsel_gcc-4.6.3_uClibc-0.9.32.1/mipsel-linux-uclibc/bin/mipsel-linux-uclibc-gcc > -x c - > > $ scp -v -p a.out [email protected]:/var/tmp > > $ ssh [email protected] > > [ SSH session ] > > root@fritz:/var/tmp# ls -l ltrace ltrace.conf a.out > -rwxr-xr-x 1 root root 5550 Sep 3 19:21 a.out > -rwxr-xr-x 1 root root 267980 Sep 3 18:42 ltrace > -rw-r--r-- 1 root root 15598 Sep 3 18:42 ltrace.conf > > root@fritz:/var/tmp# ./ltrace --config=ltrace.conf ./a.out > blah > +++ exited (status 5) +++ > > Regards, > - Sedat - > > P.S.: "a.out" file attached! > >> Thank you, >> PM
[ Addendum ] root@fritz:/var/tmp# ./ltrace --config=ltrace.conf --debug=71 ./a.out 2>&1 | tee ltrace-debug-71.txt - Sedat - P.S.: ltrace-debug-71.txt (XZ-compressed) file attached!
ltrace-debug-71.txt.xz
Description: Binary data
ltrace-debug-71.txt.xz.sha256sum
Description: Binary data
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