FUNCTION::UCALLERS(3stap) Context Functions FUNCTION::UCALLERS(3stap)
function::ucallers - Return first n elements of user stack backtrace
number of levels to descend in the stack (not counting the top
level). If n is -1, print the entire stack.
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).
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.
SystemTap Tapset Reference November 2019 FUNCTION::UCALLERS(3stap)