Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.37 as permitted sender) client-ip=23.128.96.37;
Sender: Namhyung Kim <namhyung@gmail.com>
From:   Namhyung Kim <namhyung@kernel.org>
To:     Arnaldo Carvalho de Melo <acme@kernel.org>,
        Jiri Olsa <jolsa@kernel.org>
Cc:     Ian Rogers <irogers@google.com>,
        Adrian Hunter <adrian.hunter@intel.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@kernel.org>,
        LKML <linux-kernel@vger.kernel.org>,
        linux-perf-users@vger.kernel.org,
        Milian Wolff <milian.wolff@kdab.com>,
        Pablo Galindo <pablogsal@gmail.com>,
        Fangrui Song <maskray@google.com>
Subject: [PATCH 0/3] perf tools: Random fixes for DWARF unwind
Date:   Mon, 11 Dec 2023 23:05:43 -0800
Message-ID: <20231212070547.612536-1-namhyung@kernel.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Hello,

I've found a couple of issues on the unwind code while I'm playing with
the JIT-dump code for the CPython.  The code assumes normal DSOs mapped
from the beginning of the file and aligned to the page size.  But it's
not true for the JIT-dumped DSOs which are generated for each function.

Depending on the JIT implementation, the code address and accompanied
ELF info (like ELF file headers and unwind info) can be overlapped to
adjacent (JIT-dumped) DSOs.  So it should take more care when it
calculates the mapping address for the DSO.

It seems these changes need to go to the stable trees but they are
changed a lot since then so I'm not sure.

Thanks,
Namhyung


Namhyung Kim (3):
  perf genelf: Set ELF program header addresses properly
  perf unwind-libdw: Handle JIT-generated DSOs properly
  perf unwind-libunwind: Fix base address for .eh_frame

 tools/perf/util/genelf.c                 |  6 +++---
 tools/perf/util/unwind-libdw.c           | 21 +++++++++++++++++----
 tools/perf/util/unwind-libunwind-local.c |  2 +-
 3 files changed, 21 insertions(+), 8 deletions(-)

-- 
2.43.0.472.g3155946c3a-goog