NAME

       function::ubacktrace - Hex backtrace of current user-space task stack.

SYNOPSIS

           ubacktrace:string()

ARGUMENTS

       None

DESCRIPTION

       Return a string of hex addresses that are a backtrace of the stack of the current task.
       Output may be truncated as per maximum string length. Returns empty string when current
       probe point cannot determine user backtrace. See backtrace for kernel traceback.

NOTE

       To get (full) backtraces for user space applications and shared shared libraries not
       mentioned in the current script run stap with -d /path/to/exe-or-so and/or add --ldd to
       load all needed unwind data.