| Server IP : 104.21.25.180 / Your IP : 104.23.197.122 Web Server : Apache/2.4.37 System : Linux almalinux.duckdns.org 4.18.0-553.111.1.el8_10.x86_64 #1 SMP Sun Mar 8 20:06:07 EDT 2026 x86_64 User : ricodeal ( 1046) PHP Version : 7.4.33 Disable Function : NONE MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : ON Directory : /usr/share/systemtap/examples/general/ |
Upload File : |
title: Watch a Variable Changing Value in a Thread
name: varwatch.stp
keywords: _best monitoring
exit: user-controlled
output: trace
scope: system-wide
description: This script places a set of probes (specified by $1), each of which monitors the state of some context $variable expression (specified by $2). Whenever the value changes, with respect to the active thread, the event is traced.
test_check: stap -wp4 varwatch.stp 'kernel.statement("do_sys_open@fs/open.c:*")' '$$vars'
test_installcheck: stap -w varwatch.stp 'kernel.statement("do_sys_open@fs/open.c:*")' '$$vars' -T 1