On Mon, 7 May 2018 11:30:03 -0400 Steven Rostedt <rostedt@xxxxxxxxxxx> wrote: > On Sun, 6 May 2018 00:51:43 +0900 > Masami Hiramatsu <mhiramat@xxxxxxxxxx> wrote: > > > OK, now I think it is a time to introduce new unified interface for dynamic events, > > tracefs/dynamic_events and make uprobe_events and kprobe_events as symbolic-links > > to the new interface file. > > So basically make one file that does all the work? > > I'm not sure we can keep the other files as symbolic links. Because we > don't want the kprobe_events showing up in the uprobe_events file, and > vice versa. We need to keep all this backward compatible. Good catch! Can't we check which file the user opened? If not, even though we can setup a filter in ops->open(). > > But I do like the idea of one file to rule them all, approach. Thanks! > > -- Steve > > > > > > Actually, there is no reason we split those 2 interfaces, since > > both have similar, but very clear syntax differences. > > > > o Uprobe event definition > > p[:[GRP/]EVENT] PATH:OFFSET [FETCHARGS] : Set a uprobe > > r[:[GRP/]EVENT] PATH:OFFSET [FETCHARGS] : Set a return uprobe (uretprobe) > > -:[GRP/]EVENT : Clear uprobe or uretprobe event > > > > o Kprobe event definition > > p[:[GRP/]EVENT] [MOD:]SYM[+offs]|MEMADDR [FETCHARGS] : Set a probe > > r[MAXACTIVE][:[GRP/]EVENT] [MOD:]SYM[+0] [FETCHARGS] : Set a return probe > > -:[GRP/]EVENT : Clear a probe > > > > At first, it is clear that those can share the parser. 2nd, it is easy to > > distinguish those, because Uprobe event must require the PATH which starts > > with '/', on the other hand, Kprobe event must NOT start with '/'. > > (both SYM and MOD will start with alphabet or '_', of course MEMADDR > > will start with digits) > > > > If we can merge those to unified dynamic_events interface, I think > > 'f[:[GRP/]EVENT] SYM(CAST)' is also acceptable, since it is no more > > only for kprobe/uprobe. We can directly add some other dynamic > > events via dynamic_events interface. ;) > > > > Thank you, > > > -- Masami Hiramatsu <mhiramat@xxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
