linux-kernel - [BUGFIX PATCH 0/6] perf/probe: Additional fixes for range only functions

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Date:   Fri, 25 Oct 2019 17:46:15 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...nel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: [BUGFIX PATCH 0/6] perf/probe: Additional fixes for range only functions

Hi Arnaldo,

Here are some bugfixes for the bugs you found in previous series
and similar one.

I found that there are some dwarf_entrypc() related bugs in perf
probe and fixed all except one special add-hoc code in
convert_variable_location()(*).

This time I embedded before-and-after examples in each commit.
Please check it how to reproduce it.

(*) This had been introduced for fixup fentry related gcc bug,
see commit 3d918a12a1b3 ("perf probe: Find fentry mcount fuzzed
parameter location") for detail. Nowadays gcc already fixed
this issue and this seems like a dead code. Moreover, it is not
sure such old gcc can generate DIE without entry_pc attribute.
So I decided not to touch it.

Thank you,

---

Masami Hiramatsu (6):
      perf/probe: Fix wrong address verification
      perf/probe: Fix to probe a function which has no entry pc
      perf/probe: Fix to probe an inline function which has no entry pc
      perf/probe: Fix to list probe event with correct line number
      perf/probe: Fix to show inlined function callsite without entry_pc
      perf/probe: Fix to show ranges of variables in functions without entry_pc

 tools/perf/util/dwarf-aux.c    |    6 +++---
 tools/perf/util/probe-finder.c |   40 ++++++++++++++--------------------------
 2 files changed, 17 insertions(+), 29 deletions(-)

--
Masami Hiramatsu (Linaro) <mhiramat@...nel.org>