Re: [RFC][PATCH 00/14 v2] function_graph: Rewrite to allow multiple users

[Steven Rostedt]

On Wed, 22 May 2019 23:19:55 +0900
Masami Hiramatsu <mhiramat@xxxxxxxxxx> wrote:

> >  void *fgraph_reserve_data(int size_in_bytes)
> > 
> >     Allows the entry function to reserve up to 4 words of data on
> >     the shadow stack. On success, a pointer to the contents is returned.
> >     This may be only called once per entry function.
> > 
> >  void *fgraph_retrieve_data(void)
> > 
> >     Allows the return function to retrieve the reserved data that was
> >     allocated by the entry function.  
> 
> Nice! this seems good for kretprobe too. I'll review and try to port
> kretprobe on this framework.

If you rather pull from my git repo and not download all the patches,
they are currently available in my ftrace/fgraph-multi branch.

-- Steve