'\" t
.\"     Title: function::ubacktrace
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: November 2023
.\"    Manual: Context Functions
.\"    Source: SystemTap Tapset Reference
.\"  Language: English
.\"
.TH "FUNCTION::UBACKTRACE" "3stap" "November 2023" "SystemTap Tapset Reference" "Context Functions"
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.SH "NAME"
function::ubacktrace \- Hex backtrace of current user\-space task stack\&.
.SH "SYNOPSIS"
.sp
.nf
    ubacktrace:string()
.fi
.SH "ARGUMENTS"
.PP
None
.SH "DESCRIPTION"
.PP
.PP
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
\fBbacktrace\fR
for kernel traceback\&.
.SH "NOTE"
.PP
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\&.
.SH SEE ALSO\n 
.IR tapset::ucontext-unwind (3stap)