linux-kernel - [PATCH 0/4] perf tools: Fix MMAP2 build-ID synthesis in namespaces (v1)

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Date:   Fri, 16 Sep 2022 10:58:58 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-perf-users@...r.kernel.org
Subject: [PATCH 0/4] perf tools: Fix MMAP2 build-ID synthesis in namespaces (v1)

Hello,

The perf record --buildid-mmap enables PERF_RECORD_MISC_MMAP_BUILD_ID
which includes a build-ID of the DSO.  It requires to read the info from the
file when synthesizing.  But I found some issues in the current code that it
didn't check duplicate files and didn't handle namespaces.

I think chroot is not a concern since perf will see it from the outside so
that it can see the full path.

The code is available at 'perf/mmap2-buildid-fix-v1' branch on

  git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git

Thanks,
Namhyung


Namhyung Kim (4):
  perf tools: Move dsos functions to util/dsos.c
  perf tools: Add perf_event__synthesize_{start,stop}()
  perf record: Save DSO build-ID for synthesizing
  perf tools: Honor namespace when synthesizing build-id

 tools/perf/builtin-inject.c        |  3 ++
 tools/perf/builtin-record.c        |  3 ++
 tools/perf/builtin-stat.c          |  2 +
 tools/perf/builtin-top.c           |  4 ++
 tools/perf/util/auxtrace.c         |  2 +
 tools/perf/util/dsos.c             | 29 +++++++++++++
 tools/perf/util/dsos.h             |  3 ++
 tools/perf/util/machine.c          | 29 -------------
 tools/perf/util/synthetic-events.c | 65 ++++++++++++++++++++++++++----
 tools/perf/util/synthetic-events.h |  3 ++
 10 files changed, 107 insertions(+), 36 deletions(-)


base-commit: 62e64c9d2fd12839c02f1b3e8b873e7cb34e8720
-- 
2.37.3.968.ga6b4b080e4-goog