xenial (7) error::process-tracking.7stap.gz

NAME

       warning::process-tracking - process-tracking facilities are not available

DESCRIPTION

       These  errors  and  warnings  occur  when the kernel systemtap is running on lacks support for user-space
       process tracking facilities.

   COMPILE-TIME ERROR
       The error

              ERROR: user-space process-tracking facilities not available

       occurs when the script contains a uprobes probe point that the current kernel does not support.

   RUNTIME WARNINGS
       The warning,

              WARNING: process-tracking facilities are not available in this kernel

       and the related message,

              WARNING: cannot track target in process '...'

       both occur at runtime when running on a kernel (generally an  older  version)  that  has  neither  utrace
       functionality nor an acceptable substitute.

       The  script  should  still  load  and  run. However, probes that rely on availability of process-tracking
       facilities will silently fail to trigger.

RESOLVING THE ISSUE

       If process-tracking functionality is absolutely necessary, either a kernel  version  newer  than  3.5  is
       needed, or an older version must be compiled with appropriate utrace patches.

SEE ALSO

       stap(1),
       error::reporting(7stap)

                                                                                WARNING::PROCESS-TRACKING(7stap)