Re: [PATCH v2] tracing: selftests: Add testing a user string to filters

On 4/18/25 08:12, Steven Rostedt wrote:

From: Steven Rostedt rostedt@goodmis.org

Running the following commands was broken:

# cd /sys/kernel/tracing # echo "filename.ustring ~ "/proc*"" > events/syscalls/sys_enter_openat/filter # echo 1 > events/syscalls/sys_enter_openat/enable # ls /proc/$$/maps # cat trace

And would produce nothing when it should have produced something like:

   ls-1192    [007] .....  8169.828333: sys_openat(dfd: ffffffffffffff9c, filename: 7efc18359904, flags: 80000, mode: 0)

Add a test to check this case so that it will be caught if it breaks again.

Link: https://lore.kernel.org/linux-trace-kernel/20250417183003.505835fb@gandalf.l...

Signed-off-by: Steven Rostedt (Google) rostedt@goodmis.org

Changes since v1: https://lore.kernel.org/20250417223323.3edb4f6c@batman.local.home

• Use $TMPDIR instead of $TESTDIR as test file (Masami Hiramatsu)

Steve, Masami

Do you want me to take this for rc4?

thanks, -- Shuah