linux-kernel - Re: [PATCH v3 0/3] perf/sdt: Hardening argument support

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Date:   Tue, 28 Mar 2017 12:40:40 -0300
From:   Arnaldo Carvalho de Melo <acme@...hat.com>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>,
        alexis.berlemont@...il.com, linux-kernel@...r.kernel.org,
        peterz@...radead.org, mingo@...hat.com,
        alexander.shishkin@...ux.intel.com,
        naveen.n.rao@...ux.vnet.ibm.com, mpe@...erman.id.au,
        hemant@...ux.vnet.ibm.com
Subject: Re: [PATCH v3 0/3] perf/sdt: Hardening argument support

Em Wed, Mar 29, 2017 at 12:29:29AM +0900, Masami Hiramatsu escreveu:
> Hi Arnaldo,
> 
> please pull this, I've already acked to this series.

I did it 15 minutes ago, running build tests on it now.

- Arnaldo
 
> Thank you, 
> 
> On Tue, 28 Mar 2017 15:17:51 +0530
> Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com> wrote:
> 
> > SDT event argument support on x86 is recently added to Perf. But
> > there are couple of issues with it.
> > 
> > It lacks renaming mapping for few 8 bit registers: al, bl, cl, dl,
> > ah, bh, ch and dh. SDT events using these registers in arguments
> > are failing at 'perf probe'. Add renaming logic to them. (patch 1)
> > 
> > It still has x86 specific code in general code. It also fails to
> > convert arguments having no offset but still surrounds register with
> > parenthesis for ex. 8@(%rdi) is converted to +(%di):u64, which is
> > rejected by uprobe_events. Also, 'perf probe' is failing for *all SDT
> > events on all archs except x86*. Solve these issues. (patch 2)
> > 
> > Add argument parser for powerpc. (patch 3)
> > 
> > Changes in v3:
> >   - (patch 1) Add renaming entries for ah, bh, ch and dh registers.[1]
> > 
> >   - (patch 1) v2 contains silly copy-paste error. It maps all al, bl...
> >     registers to ax. Fix that.
> > 
> >   - (patch 2) Fix typo 'constant'.
> > 
> >   - Patch 2 is not applying cleanly on top of patch 1 after adding
> >     ah, bh... registers. Fix that.
> > 
> > v2: https://lkml.org/lkml/2017/3/27/118
> > 
> > This patch is prepared on top of acme/perf/core.
> > 
> > [1] https://lkml.org/lkml/2017/3/27/462
> > 
> > Ravi Bangoria (3):
> >   perf/sdt/x86: Add renaming logic for (missing) 8 bit registers
> >   perf/sdt/x86: Move OP parser to tools/perf/arch/x86/
> >   perf/sdt/powerpc: Add argument support
> > 
> >  tools/perf/arch/powerpc/util/perf_regs.c | 111 ++++++++++++++++++
> >  tools/perf/arch/x86/util/perf_regs.c     | 187 +++++++++++++++++++++++++------
> >  tools/perf/util/perf_regs.c              |   6 +-
> >  tools/perf/util/perf_regs.h              |  11 +-
> >  tools/perf/util/probe-file.c             | 132 +++++++---------------
> >  5 files changed, 313 insertions(+), 134 deletions(-)
> > 
> > -- 
> > 2.9.3
> > 
> 
> 
> -- 
> Masami Hiramatsu <mhiramat@...nel.org>