linux-kernel - [BUGFIX PATCH 0/4] perf probe: Fixes bugs in show-lines and show vars etc.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 30 Oct 2019 16:09:10 +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 0/4] perf probe: Fixes bugs in show-lines and show vars etc.

Hi Arnaldo,

Here are some more patches for fixing bugs which I found
while testing it.

 - [1/4]: I found that the debuginfo had precise line information
	but including non-statement and end-of-sequence entries.
	Those must be ignored because not represent target line.

 - [2/4]: I also found that there is GNU_call_site DIEs in debuginfo,
	which represents the location which calls another function.
	Since it is not an instance of inlined function, it must be
	ignored while searching instances of inlined function.

 - [3/4]: However, while listing up the available lines, we also need
	to show the lines calling another function. So if call_line and
	call_file attribute are same as line information, it shows that
	line as available.

 - [4/4]: It's a small fix to skip overlapped location while showing
	available variables.


Thank you,

---

Masami Hiramatsu (4):
      perf probe: Skip end-of-sequence and non statement lines
      perf probe: Filter out instances except for inlined subroutine and subprogram
      perf probe: Fix to show calling lines of inlined functions
      perf probe: Skip overlapped location on searching variables


 tools/perf/util/dwarf-aux.c    |   36 +++++++++++++++++++++++++++++-------
 tools/perf/util/probe-finder.c |   20 ++++++++++++++++++++
 2 files changed, 49 insertions(+), 7 deletions(-)

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