On Tue, 2 May 2023 11:18:21 +0900 "Masami Hiramatsu (Google)" <mhiramat@xxxxxxxxxx> wrote: > From: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx> > > Add the '$$args' meta fetch argument for function-entry probe events. This Hmm, couldn't we just use $args ? That would be different from $arg1, $arg2, etc. The $$ to me would be either the bash pid of current, or perhaps it would be just to use a dollar sign. I don't see the precedence of $$args being a "full expand". -- Steve > will be expanded to the all arguments of the function and the tracepoint > using BTF function argument information. > > e.g. > # echo 'p vfs_read $$args' >> dynamic_events > # echo 'f vfs_write $$args' >> dynamic_events > # echo 't sched_overutilized_tp $$args' >> dynamic_events > # cat dynamic_events > p:kprobes/p_vfs_read_0 vfs_read file=file buf=buf count=count pos=pos > f:fprobes/vfs_write__entry vfs_write file=file buf=buf count=count pos=pos > t:tracepoints/sched_overutilized_tp sched_overutilized_tp rd=rd overutilized=overutilized > > Signed-off-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx> > ---
