Re: [PATCH] perf symbol: Fail to read phdr workaround

From: Arnaldo Carvalho de Melo
Date: Mon Aug 01 2022 - 13:58:10 EST


Em Mon, Aug 01, 2022 at 09:25:11PM +0800, Leo Yan escreveu:
> On Mon, Aug 01, 2022 at 09:38:23AM -0300, Arnaldo Carvalho de Melo wrote:
> > Em Sun, Jul 31, 2022 at 11:19:15PM -0700, Ian Rogers escreveu:
> > > On Sun, Jul 31, 2022, 6:53 PM Leo Yan <leo.yan@xxxxxxxxxx> wrote:
> > >
> > > > On Sun, Jul 31, 2022 at 09:49:23AM -0700, Ian Rogers wrote:
> > > > > The perf jvmti agent doesn't create program headers, in this case
> > > > > fallback on section headers as happened previously.
> > > > >
> > > > > Fixes: 882528d2e776 ("perf symbol: Skip symbols if SHF_ALLOC flag is not
> > > > set")
> > > >
> > > > It's good to change fix tag as:
> > > > Fixes: 2d86612aacb7 ("perf symbol: Correct address for bss symbols")
> > > >
> > >
> > > Doh! I was rushing this morning. Thanks for catching and reviewing!
> >
> > I made the adjustments and added a note with the repro, to help in the
> > future when trying to test this area.
>
> Thanks, Arnaldo.
>
> > I also think we could have something like a 'perf test' mode where, when
> > asked to, it would enable tests that involve downloading such files to
> > perform tests, such as this dacapo benchmark, and then would test if the
> > output matches expectations.
>
> I will add a testing based on the steps, alongside with the discussed
> testing for data symbols. Will share out after get ready.

Great! Thanks in advance,

- Arnaldo