The instructions below need to be tested if they still work with a current Replicant release and these notes for Replicant 6.0 should be added, but with more details.
Here are some notes on debugging with GDB:
adb shell gdbserver 127.0.0.1:8022 --attach $(pidof mediaserver )
adb forward tcp:8022 tcp:8022
. build/envsetup.sh lunch replicant_maguro-eng $ arm-linux-androideabi-gdb GNU gdb (GDB) 7.1-android-gg2 Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "--host=i686-linux-gnu --target=arm-elf-linux". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. (gdb) set sysroot ./out/target/product/maguro/symbols/ (gdb) set solib-search-path ./out/target/product/maguro/symbols/system/lib/:./out/target/product/maguro/symbols/system/lib/hw/:./out/target/product/maguro/symbols/system/vendor/lib/hw/ (gdb) file ./out/target/product/maguro/symbols/system/bin/mediaserver (gdb) target remote 127.0.0.1:8022