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Date: Thu, 16 Feb 2017 20:54:06 +0100
From: Ingo Molnar <mingo@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: linux-kernel@...r.kernel.org,
Adrian Hunter <adrian.hunter@...el.com>,
David Ahern <dsahern@...il.com>,
Davidlohr Bueso <dbueso@...e.de>,
Hitoshi Mitake <mitake@....info.waseda.ac.jp>,
Jakub Jelen <jjelen@...hat.com>, Jiri Olsa <jolsa@...nel.org>,
Josh Poimboeuf <jpoimboe@...hat.com>,
Masami Hiramatsu <mhiramat@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Wang Nan <wangnan0@...wei.com>,
linux-perf-users@...r.kernel.org,
Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: Re: [GIT PULL 00/14] perf/core clang fixes
* Arnaldo Carvalho de Melo <acme@...nel.org> wrote:
> Hi Ingo,
>
> Here is a bunch of changes to allow buildint tools/perf/ with CC=clang,
> there are a few more to allow building the python code, but I already manage to
> finish the build without it.
>
> Please consider pulling,
>
> - Arnaldo
>
> Test results at the end of this message, as usual.
>
> The following changes since commit 277d6f1dcae09aed63cd4c7900a280b0e18cf2ca:
>
> Merge tag 'perf-core-for-mingo-4.11-20170213' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core (2017-02-14 07:29:38 +0100)
>
> are available in the git repository at:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git tags/perf-core-for-mingo-4.11-20170215
>
> for you to fetch changes up to 34a0548f01626b01c9e98d9627812c3c9f6b6f7d:
>
> perf tools: Add missing parse_events_error() prototype (2017-02-15 11:20:49 -0300)
>
> ----------------------------------------------------------------
> perf/core clang fixes:
>
> Changes to make tools/{perf,lib/{bpf,traceevent,api}} build with
> CC=clang, to, for instance, take advantage of warnings (Arnaldo Carvalho de Melo):
>
> - Conditionally request some warning options not available on clang
>
> - Set the maximum optimization level to -O3 when using CC=clang, leave
> the previous setting of -O6 otherwise.
>
> - Make it an error to pass a signed value to OPTION_UINTEGER, so that
> we can remove abs(unsigned int) calls in 'perf bench futex'.
>
> - Make sure dprintf() is not defined before using that name in 'perf bench numa'
>
> - Avoid using field after variable sized type, its a GNU extension, use
> equivalent code.
>
> - Fix some bugs where some variables could be used unitialized,
> something not caught by gcc.
>
> - Fix some spots where we were testing struct->array[] members against
> NULL, it will always evaluate to 'true'.
>
> - Add missing parse_events_error() prototype in the bison file.
>
> There are still one problem when trying to build the python support, but
> this are the 'size' outputs for 'make -C tools/perf NO_LIBPYTHON' for
> gcc and clang builds:
>
> DW_AT_producer: clang version 4.0.0 (http://llvm.org/git/clang.git f5be8ba13adc4ba1011a7ccd60c844bd60427c1c) (ht
>
> $ size ~/bin/perf
> text data bss dec hex filename
> 3447514 831320 23901696 28180530 1ae0032 /home/acme/bin/perf
>
> DW_AT_producer: GNU C99 6.3.1 20161221 (Red Hat 6.3.1-1) -mtune=generic -march=x86-64 -ggdb3 -O6 -std=gnu99
> +-fno-omit-frame-pointer -funwind-tables -fstack-protector-all
>
> $ size ~/bin/perf
> text data bss dec hex filename
> 3671662 836480 23902752 28410894 1b1840e /home/acme/bin/perf
>
> Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
>
> ----------------------------------------------------------------
> Arnaldo Carvalho de Melo (14):
> tools: Suppress request for warning options not existent in clang
> tools: Set the maximum optimization level according to the compiler being used
> tools lib subcmd: Make it an error to pass a signed value to OPTION_UINTEGER
> Revert "perf bench futex: Sanitize numeric parameters"
> perf bench numa: Make sure dprintf() is not defined
> perf tests: Synthesize struct instead of using field after variable sized type
> perf record: Do not put a variable sized type not at the end of a struct
> perf tools: Do not put a variable sized type not at the end of a struct
> perf probe: Avoid accessing uninitialized 'map' variable
> perf evsel: Do not put a variable sized type not at the end of a struct
> perf intel pt decoder: clang has no -Wno-override-init
> perf tools: Be consistent on the type of map->symbols[] interator
> perf pmu: Fix check for unset alias->unit array
> perf tools: Add missing parse_events_error() prototype
>
> tools/lib/api/Makefile | 8 +++-
> tools/lib/subcmd/Makefile | 8 +++-
> tools/lib/subcmd/parse-options.c | 4 ++
> tools/perf/Makefile.config | 4 ++
> tools/perf/bench/futex-hash.c | 4 --
> tools/perf/bench/futex-lock-pi.c | 3 --
> tools/perf/bench/futex-requeue.c | 2 -
> tools/perf/bench/futex-wake-parallel.c | 4 --
> tools/perf/bench/futex-wake.c | 3 --
> tools/perf/bench/futex.h | 4 --
> tools/perf/bench/numa.c | 1 +
> tools/perf/builtin-record.c | 17 +++++----
> tools/perf/tests/parse-no-sample-id-all.c | 19 ++++------
> tools/perf/util/evsel.c | 62 ++++++++++++++-----------------
> tools/perf/util/intel-pt-decoder/Build | 6 ++-
> tools/perf/util/machine.c | 4 +-
> tools/perf/util/parse-events.c | 15 +++-----
> tools/perf/util/parse-events.y | 2 +
> tools/perf/util/pmu.c | 4 +-
> tools/perf/util/probe-event.c | 2 +-
> tools/perf/util/session.c | 2 +-
> tools/scripts/Makefile.include | 5 ++-
> 22 files changed, 91 insertions(+), 92 deletions(-)
Pulled, thanks a lot Arnaldo!
Ingo
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