linuxcrashprocpanic

collect /proc/<pid> information of process during process crash in linux


I am trying to collect some proc file system info of a process during panic. is there any way like script or any program which help to collection those info and put some directory of system.

The reason why i asked is understand post analysis of process panic.


Solution

  • Use gdb, it will stop at the moment your app crashes and you will get a prompt. You will then be able to:

    Typical example:

    $ gdb -ex 'run arg1 arg2 ... argN' faulty_app
    (...)
    Program received signal SIGSEGV, Segmentation fault.
    0x000055555555513d in faulty_func ()
    
    (gdb) (... do some stuff like e.g. backtrace ...)
    
    (gdb) p (int)getpid()
    $2 = 2993764
    
    (gdb) !bash
    
    $ cd /proc/2993764
    (... do some stuff ...)
    
    $ exit
    exit
    
    (gdb) quit
    A debugging session is active.
    
        Inferior 1 [process 2993764] will be killed.
    
    Quit anyway? (y or n) y