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Date: Fri, 26 Feb 2021 20:47:36 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Jiri Olsa <jolsa@...hat.com>
Cc: Nicholas Fraser <nfraser@...eweavers.com>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Namhyung Kim <namhyung@...nel.org>,
Ian Rogers <irogers@...gle.com>, linux-kernel@...r.kernel.org,
Ulrich Czekalla <uczekalla@...eweavers.com>,
Huw Davies <huw@...eweavers.com>
Subject: Re: [PATCH] perf buildid-cache: Add test for PE executable
Em Thu, Feb 25, 2021 at 09:35:04PM +0100, Jiri Olsa escreveu:
> On Wed, Feb 24, 2021 at 02:59:16PM -0500, Nicholas Fraser wrote:
> > From 9fd0b3889f00ad13662879767d833309d8a035b6 Mon Sep 17 00:00:00 2001
> > From: Nicholas Fraser <nfraser@...eweavers.com>
> > Date: Thu, 18 Feb 2021 13:24:03 -0500
> > Subject: [PATCH] perf buildid-cache: Add test for PE executable
> >
> > This builds on the previous changes to tests/shell/buildid.sh, adding
> > tests for a PE file. It adds it to the build-id cache manually and, if
> > Wine is available, runs it under "perf record" and verifies that it was
> > added automatically.
> >
> > If wine is not installed, only warnings are printed; the test can still
> > exit 0.
> >
> > Signed-off-by: Nicholas Fraser <nfraser@...eweavers.com>
>
> works nicely now, thanks
>
> Acked-by: Jiri Olsa <jolsa@...hat.com>
Thanks for checking it, but if you did a review, i.e. if you looked at
the code, made suggestions, the submitter acted upon those changes, you
looked again, etc, shouldn't this be a more appropriate:
Reviewed-by: Jiri Olsa <jolsa@...hat.com>
?
I think we need to make these tags reflect more what really happened,
i.e. if you just glanced over and thought, quickly, that it seems
okayish, then Acked-by is what we should use, but if you gone thru the
trouble of actually _looking hard_ at it, sometimes multiple times, then
we should really use Reviewed-by and not take that lightly.
- Arnaldo
> jirka
>
> > ---
> > tools/perf/tests/shell/buildid.sh | 65 +++++++++++++++++++++++++++----
> > 1 file changed, 58 insertions(+), 7 deletions(-)
> >
> > diff --git a/tools/perf/tests/shell/buildid.sh b/tools/perf/tests/shell/buildid.sh
> > index 416af614bbe0..f05670d1e39e 100755
> > --- a/tools/perf/tests/shell/buildid.sh
> > +++ b/tools/perf/tests/shell/buildid.sh
> > @@ -14,18 +14,56 @@ if ! [ -x "$(command -v cc)" ]; then
> > exit 2
> > fi
> >
> > +# check what we need to test windows binaries
> > +add_pe=1
> > +run_pe=1
> > +if ! perf version --build-options | grep -q 'libbfd: .* on '; then
> > + echo "WARNING: perf not built with libbfd. PE binaries will not be tested."
> > + add_pe=0
> > + run_pe=0
> > +fi
> > +if ! which wine > /dev/null; then
> > + echo "WARNING: wine not found. PE binaries will not be run."
> > + run_pe=0
> > +fi
> > +
> > +# set up wine
> > +if [ ${run_pe} -eq 1 ]; then
> > + wineprefix=$(mktemp -d /tmp/perf.wineprefix.XXX)
> > + export WINEPREFIX=${wineprefix}
> > + # clear display variables to prevent wine from popping up dialogs
> > + unset DISPLAY
> > + unset WAYLAND_DISPLAY
> > +fi
> > +
> > ex_md5=$(mktemp /tmp/perf.ex.MD5.XXX)
> > ex_sha1=$(mktemp /tmp/perf.ex.SHA1.XXX)
> > +ex_pe=$(dirname $0)/../pe-file.exe
> >
> > echo 'int main(void) { return 0; }' | cc -Wl,--build-id=sha1 -o ${ex_sha1} -x c -
> > echo 'int main(void) { return 0; }' | cc -Wl,--build-id=md5 -o ${ex_md5} -x c -
> >
> > -echo "test binaries: ${ex_sha1} ${ex_md5}"
> > +echo "test binaries: ${ex_sha1} ${ex_md5} ${ex_pe}"
> >
> > check()
> > {
> > - id=`readelf -n ${1} 2>/dev/null | grep 'Build ID' | awk '{print $3}'`
> > -
> > + case $1 in
> > + *.exe)
> > + # We don't have a tool that can pull a nicely formatted build-id out of
> > + # a PE file, but we can extract the whole section with objcopy and
> > + # format it ourselves. The .buildid section is a Debug Directory
> > + # containing a CodeView entry:
> > + # https://docs.microsoft.com/en-us/windows/win32/debug/pe-format#debug-directory-image-only
> > + # https://github.com/dotnet/runtime/blob/da94c022576a5c3bbc0e896f006565905eb137f9/docs/design/specs/PE-COFF.md
> > + # The build-id starts at byte 33 and must be rearranged into a GUID.
> > + id=`objcopy -O binary --only-section=.buildid $1 /dev/stdout | \
> > + cut -c 33-48 | hexdump -ve '/1 "%02x"' | \
> > + sed 's@^\(..\)\(..\)\(..\)\(..\)\(..\)\(..\)\(..\)\(..\)\(.*\)0a$@\4\3\2\1\6\5\8\7\9@'`
> > + ;;
> > + *)
> > + id=`readelf -n ${1} 2>/dev/null | grep 'Build ID' | awk '{print $3}'`
> > + ;;
> > + esac
> > echo "build id: ${id}"
> >
> > link=${build_id_dir}/.build-id/${id:0:2}/${id:2}
> > @@ -50,7 +88,7 @@ check()
> > exit 1
> > fi
> >
> > - ${perf} buildid-cache -l | grep $id
> > + ${perf} buildid-cache -l | grep ${id}
> > if [ $? -ne 0 ]; then
> > echo "failed: ${id} is not reported by \"perf buildid-cache -l\""
> > exit 1
> > @@ -79,16 +117,20 @@ test_record()
> > {
> > data=$(mktemp /tmp/perf.data.XXX)
> > build_id_dir=$(mktemp -d /tmp/perf.debug.XXX)
> > + log=$(mktemp /tmp/perf.log.XXX)
> > perf="perf --buildid-dir ${build_id_dir}"
> >
> > - ${perf} record --buildid-all -o ${data} ${1}
> > + echo "running: perf record $@"
> > + ${perf} record --buildid-all -o ${data} $@ &> ${log}
> > if [ $? -ne 0 ]; then
> > - echo "failed: record ${1}"
> > + echo "failed: record $@"
> > + echo "see log: ${log}"
> > exit 1
> > fi
> >
> > - check ${1}
> > + check ${@: -1}
> >
> > + rm -f ${log}
> > rm -rf ${build_id_dir}
> > rm -rf ${data}
> > }
> > @@ -96,12 +138,21 @@ test_record()
> > # add binaries manual via perf buildid-cache -a
> > test_add ${ex_sha1}
> > test_add ${ex_md5}
> > +if [ ${add_pe} -eq 1 ]; then
> > + test_add ${ex_pe}
> > +fi
> >
> > # add binaries via perf record post processing
> > test_record ${ex_sha1}
> > test_record ${ex_md5}
> > +if [ ${run_pe} -eq 1 ]; then
> > + test_record wine ${ex_pe}
> > +fi
> >
> > # cleanup
> > rm ${ex_sha1} ${ex_md5}
> > +if [ ${run_pe} -eq 1 ]; then
> > + rm -r ${wineprefix}
> > +fi
> >
> > exit ${err}
> > --
> > 2.30.1
> >
> >
>
--
- Arnaldo
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