On Wed, 27 Feb 2019 14:32:41 -0800 Alexei Starovoitov <alexei.starovoi...@gmail.com> wrote:
> On Wed, Feb 27, 2019 at 11:42:15PM +0900, Masami Hiramatsu wrote: > > > > For perf-probe, we can add some attribute for each argument > > which indicate that the variable in user space. But still > > we can not decide it automatically by DWARF since __user attribute > > is not transrated to DWARF attribute. > > clang has partial support for __attribute__((noderef, address_space(1))) > We'll work on patches to make it complete and pass __user attribute > all the way to debug info. Great! That's what I need. Could you point where (or who) I should check the implementation? I guess it will add DW_AT_segment to variable instance, if so it is easy to support it in perf probe. > > If somebody can work with gcc folks to do the same that would be awesome. > Thank you, -- Masami Hiramatsu <mhira...@kernel.org>
