uprobe_events can't accept paths that contain spaces

[Yuxuan Shui]

Hi,

I hit this problem accidentally when one of the shared libraries I was
looking at is located in a directory with spaces in its name. `perf
probe` reported "Failed to write event: Invalid argument".

If I understand the code correctly, strings written into uprobe_events
are strictly splitted at whitespaces (by `argv_split`). This seems
like an unfortunate restriction. If I submit a patch to introduce
support for either quotes (") or escapes (\), will that be considered?

(For context I am running something that expects its libraries to be
located at fixed paths, so moving them to a different path would be
awkward at best.)

Thanks.

-- 

Regards
Yuxuan Shui