Provided by: systemtap-doc_2.3-1ubuntu1_all
function::callers - Return first n elements of kernel stack backtrace
n 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 kernel stack. Output may be truncated as per maximum string length (MAXSTRINGLEN).