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]
Message-Id: <147464488719.29804.13099016520754675018.stgit@devbox>
Date:   Sat, 24 Sep 2016 00:34:47 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Masami Hiramatsu <mhiramat@...nel.org>,
        linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Jiri Olsa <jolsa@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        David Ahern <dsahern@...il.com>
Subject: [PATCH perf/core 0/4] perf-probe fixes for C++

Hi,

Here is a series of patches for fixing several issues when
probing on C++ binaries.

- Ignore inlined function definition if it has no instance [1/4]
- Skip (inlined/normal) functions which entry address is 0 [2/4]
- Cut off the filename for group name if it includes characters
  which can not be used for C symbol name [3/4]
- Search mangled symbol name from debuginfo [4/4]

So, with this series, perf-probe can handle "mangled symbol" or
"method name" as below;
  ----
  $ ./perf probe -x /usr/lib64/libstdc++.so.6 \
    -D _ZNKSt15basic_fstreamXXIwSt11char_traitsIwEE7is_openEv
  p:probe_libstdc/_ZNKSt15basic_fstreamXXIwSt11char_traitsIwEE7is_openEv
  /usr/lib64/libstdc++.so.6.0.22:0x8ca60

  $ ./perf probe -x /usr/lib64/libstdc++.so.6 -D is_open
  p:probe_libstdc/is_open /usr/lib64/libstdc++.so.6.0.22:0x8ca80
  p:probe_libstdc/is_open_1 /usr/lib64/libstdc++.so.6.0.22:0x8ca70
  p:probe_libstdc/is_open_2 /usr/lib64/libstdc++.so.6.0.22:0x8ca60
  p:probe_libstdc/is_open_3 /usr/lib64/libstdc++.so.6.0.22:0xb0ad0
  p:probe_libstdc/is_open_4 /usr/lib64/libstdc++.so.6.0.22:0xecca9
  ----

Jiri and Thomas, could you try this if you need it?

TODO:
 - Support demangled method name(in short), like std::basic_fstream::is_open.

Thank you,

---

Masami Hiramatsu (4):
      perf-probe: Ignore the error of finding inline instance
      perf-probe: Skip if the function address is 0
      perf-probe: Fix to cut off incompatible chars from group name
      perf-probe: Match linkage name with mangled name


 tools/perf/util/dwarf-aux.c    |   28 ++++++++++++++++++++++++++--
 tools/perf/util/dwarf-aux.h    |    3 +++
 tools/perf/util/probe-event.c  |   10 +++++++---
 tools/perf/util/probe-finder.c |   17 ++++++++++++++---
 4 files changed, 50 insertions(+), 8 deletions(-)

--
Masami Hiramatsu

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ