20:11 <derek0883> Hi, how can I use variable in probe? like this: global app="Hello1" probe process(app).function("main") { printf("%s started\n", execname())} next time I can change app="Otherapp".

20:15 <fche> derek0883, you can't do that at run time

20:15 <fche> probe point take literals as parameters, because stap must know at compile time what processes to attach to, where to look for their main() function, etc.

20:15 <derek0883> I don't need dot it at run time, I want stop the script, and change appname,

20:15 <fche> you can attach to general "a process has started" probe points (process.begin) e.g.

20:16 <fche> ah

20:16 <fche> so parametrize the script with an binary name? couple of ways

20:16 <derek0883> yes,

20:16 <fche> easiest: stap -e 'probe process.function("main") { ...}

20:16 <fche> ' -c CMD

20:16 <fche> then the CMD's program will be targeted

20:17 <fche> another way: stap -e 'probe process(@1).function("main") { }' FOO

20:17 <fche> i.e., pass FOO as a command line parameter, which the stap parser pastes in as a string into that @1 slot

20:20 <derek0883> It works. Thanks

20:27 <fche> righot