title: Watch a Kernel Address Using Breakpoint Hardware name: hw_watch_addr.stp version: 1.0 author: William Cohen keywords: memory watchpoint subsystem: memory status: production exit: user-controlled output: trace scope: system-wide description: The script will watch accesses to a single kernel address and prints a traceback each time the address is accessed. This script needs to be run as root to allow access to the breakpoint hardware. test_support: perf stat --event=mem:0xc000000 /bin/true test_check: stap --all-modules -p4 hw_watch_addr.stp 0x`grep "pid_max$" /proc/kallsyms` test_installcheck: stap --all-modules hw_watch_addr.stp 0x`grep "pid_max$" /proc/kallsyms` -c "sleep 1"