clinuxgdb

Using gdb to convert addresses to lines

I have a stack trace generated by a stripped application which looks like this:

 *** Check failure stack trace: ***
    @     0x7f0e442d392d  (unknown)
    @     0x7f0e442d7b1f  (unknown)
    @     0x7f0e442d7067  (unknown)
    @     0x7f0e442d801d  (unknown)
    @     0x7f0e457c55e6  (unknown)
    @     0x7f0e457c5696  (unknown)
    @           0x4e8765  (unknown)
    @           0x4a8b43  (unknown)
    @     0x7f0e43197ced  (unknown)
    @           0x4a6889  (unknown)

And I have a non-stripped version of the executable and all of its libraries ( compiled with debug information). But how can I translate the address into files and line numbers??

Here is what I have tried:

gdb
set solib-absolute-prefix /path/to/non-stripped/edition/of/root/filesystem/sysroot/
file /path/to/non-stripped/edition/of/root/filesystem/sysroot/usr/bin/my-buggy-app
info line *0x7f0e457c5696

When I type in the file command it only loads symbols from the file, not all the libraries which are used. Is there a way this can be done?

The "info line" command says:

No line number information available for address 0x7f0e442d801d

Which I assumes is because the address is in one of the shared libraries, but how can I know in which one of them?

Solution

  • But how can I translate the address into files and line numbers?

    For the main executable (addresses like 0x4e8765) do this:

    addr2line -e /path/to/non-stripped/.../my-buggy-app \
    0x4a6889 0x4a8b43 0x4e8765

    Actually, you might want to subtract 5 (usual length of the CALL instruction) from all of the above addresses.

    For the addresses in shared libraries, you have to know the load address of the library.

    If your application produced a core file, then (gdb) info shared will tell you where libraries were loaded.

    If you did not get a core file, and the application did not print the required mapping, then