FUNCTION::UCALLERS(3stap) Context Functions FUNCTION::UCALLERS(3stap)

NAME
       function::ucallers - Return first n elements of user stack backtrace

SYNOPSIS
           ucallers:string(n:long)

ARGUMENTS
       n
           number of levels to descend in the stack (not counting the top
           level). If n is -1, print the entire stack.

DESCRIPTION
       This function returns a string of the first n hex addresses from the
       backtrace of the user stack. Output may be truncated as per maximum
       string length (MAXSTRINGLEN).

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.

SEE ALSO
       tapset::ucontext(3stap)



SystemTap Tapset Reference         June 2018         FUNCTION::UCALLERS(3stap)