How to map segmentation fault address to the corresponding C code?

Question

I see a segmentation fault like this `segfault at 157e8250 ip 157e8250 sp bfa3fdfb` how do I map the this address to the corresponding code where the fault occurs?

Accepted Answer

Use the addr2line utility from the GNU binutils suite. For example, this prints out the filename, line number, and function name (demangling it if it's a C++ function) for the faulting address 0x157e8250:

```
addr2line -e my_executable_file -C -f 0x157e8250
```

You can also pass on any number of addresses in the command line, e.g. if you have a stack trace of only instruction addresses.

Make sure you compile your program with the `-g` compiler option to generate debugging symbols, otherwise `addr2line` will not be able to symbolicate anything for you.

How to map segmentation fault address to the corresponding C code?

Solution

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