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CentOS 7.0 - man page for function::sprint_ubacktrace (centos section 3stap)

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

NAME
function::sprint_ubacktrace - Return stack back trace for current user-space task as string.
SYNOPSIS
sprint_ubacktrace:string()
ARGUMENTS
None
DESCRIPTION
Returns a simple backtrace for the current task. One line per address. Includes the symbol name (or hex address if symbol couldn't be resolved) and module name (if found). Includes the offset from the start of the function if found, otherwise the offset will be added to the module (if found, between brackets). Returns the backtrace as string (each line terminated by a newline character). Note that the returned stack will be truncated to MAXSTRINGLEN, to print fuller and richer stacks use print_ubacktrace. Equivalent to sprint_ustack(ubacktrace), but more efficient (no need to translate between hex strings and final backtrace string).
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. SystemTap Tapset Reference June 2014 FUNCTION::SPRINT_UBA(3stap)


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