How to get more detailed backtrace [duplicate]

Answer 1

1. Create a pipe
2. fork()
3. Make child process execute addr2line
4. In parent process, convert the addresses returned from backtrace() to hexadecimal
5. Write the hex addresses to the pipe
6. Read back the output from addr2line and print/log it

Since you're doing all this from a signal handler, make sure to not use functionality which is not async-signal-safe. You can see a list of async-signal-safe POSIX functions here.