linux-kernel - Re: [PATCH 00/12] Stitch LBR call stack (Perf Tools)

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Date:   Fri, 6 Mar 2020 17:06:57 -0300
From:   Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To:     "Liang, Kan" <kan.liang@...ux.intel.com>
Cc:     Jiri Olsa <jolsa@...hat.com>, peterz@...radead.org,
        mingo@...hat.com, linux-kernel@...r.kernel.org,
        namhyung@...nel.org, adrian.hunter@...el.com,
        mathieu.poirier@...aro.org, ravi.bangoria@...ux.ibm.com,
        alexey.budankov@...ux.intel.com, vitaly.slobodskoy@...el.com,
        pavel.gerasimov@...el.com, mpe@...erman.id.au, eranian@...gle.com,
        ak@...ux.intel.com
Subject: Re: [PATCH 00/12] Stitch LBR call stack (Perf Tools)

Em Fri, Mar 06, 2020 at 02:13:15PM -0500, Liang, Kan escreveu:
> 
> 
> On 3/6/2020 4:39 AM, Jiri Olsa wrote:
> > On Fri, Feb 28, 2020 at 08:29:59AM -0800, kan.liang@...ux.intel.com wrote:
> > 
> > SNIP
> > 
> > > Kan Liang (12):
> > >    perf tools: Add hw_idx in struct branch_stack
> > >    perf tools: Support PERF_SAMPLE_BRANCH_HW_INDEX
> > >    perf header: Add check for event attr
> > >    perf pmu: Add support for PMU capabilities
> > 
> > hi,
> > I'm getting compile error:
> > 
> > 	util/pmu.c: In function ‘perf_pmu__caps_parse’:
> > 	util/pmu.c:1620:32: error: ‘%s’ directive output may be truncated writing up to 255 bytes into a region of size between 0 and 4095 [-Werror=format-truncation=]
> > 	 1620 |   snprintf(path, PATH_MAX, "%s/%s", caps_path, name);
> > 	      |                                ^~
> > 	In file included from /usr/include/stdio.h:867,
> > 			 from util/pmu.c:12:
> > 	/usr/include/bits/stdio2.h:67:10: note: ‘__builtin___snprintf_chk’ output between 2 and 4352 bytes into a destination of size 4096
> > 	   67 |   return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
> > 	      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > 	   68 |        __bos (__s), __fmt, __va_arg_pack ());
> > 	      |        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > 	cc1: all warnings being treated as errors
> > 
> > 	[jolsa@...va perf]$ gcc --version
> > 	gcc (GCC) 9.2.1 20190827 (Red Hat 9.2.1-1)
> 
> My GCC version is too old. I will send V2 later to fix the error.

So, Jiri asked me to push my perf/core, which I did, please refresh from
there,

Right now it is at:

[acme@...co perf]$ git log --oneline -10
c45c91f6161c (HEAD -> perf/core, seventh/perf/core, acme/perf/core, acme.korg/perf/core) perf evsel: Support PERF_SAMPLE_BRANCH_HW_INDEX
1fa65c5092da perf tools: Add hw_idx in struct branch_stack
6339998d22ec tools headers UAPI: Update tools's copy of linux/perf_event.h
401d61cbd4d4 tools lib traceevent: Remove extra '\n' in print_event_time()
76ce02651dab libperf: Add counting example
dabce16bd292 perf annotate: Get rid of annotation->nr_jumps
357a5d24c471 perf llvm: Add debug hint message about missing kernel-devel package
1af62ce61cd8 perf stat: Show percore counts in per CPU output
7982a8985150 tools lib api fs: Move cgroupsfs_find_mountpoint()
d46eec8e975a Merge remote-tracking branch 'acme/perf/urgent' into perf/core
[acme@...co perf]$

Repository:

git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git

Branch:

perf/core

Thanks,

- Arnaldo