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function::ucallers(3stap) — Linux manual page

NAME | SYNOPSIS | ARGUMENTS | DESCRIPTION | NOTE | SEE ALSO | COLOPHON 

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

NAME         top

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

SYNOPSIS         top

           ucallers:string(n:long)

ARGUMENTS         top

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

DESCRIPTION         top

       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         top

       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         top

       tapset::ucontext(3stap)

COLOPHON         top

       This page is part of the systemtap (a tracing and live-system
       analysis tool) project.  Information about the project can be
       found at ⟨https://sourceware.org/systemtap/⟩.  If you have a bug
       report for this manual page, send it to systemtap@sourceware.org.
       This page was obtained from the project's upstream Git repository
       ⟨git://sourceware.org/git/systemtap.git⟩ on 2025-08-11.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2025-07-24.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there is
       a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

SystemTap Tapset Reference      April 2025      FUNCTION::UCALLERS(3stap)

Pages that refer to this page: tapset::ucontext(3stap)

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