I'm not sure whether to blame libc (backtrace() function) or gcc or addr2line, but if I dump the pointers from backtrace() to address_file then use addr2line -e my_exe -f -i <address_file >call_locations to recover the line numbers, the line numbers are off by 1 statement for some stack frames when -O0 has been used, but not if -O2 has been used at compile time. The documentation for backtrace() suggests that things should work better with -O0 but I seem to get the opposite. I'm on gcc 4.8.1, addr2lines binutils 2.26 and libc 2.11.3-4 debian package: $ ldd --version ldd (Debian EGLIBC 2.11.3-4) 2.11.3
