linux-kernel - Re: [PATCH 1/9] perf tools: Add build id shell test

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Date:   Tue, 13 Oct 2020 13:13:40 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Ingo Molnar <mingo@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Michael Petlan <mpetlan@...hat.com>,
        Ian Rogers <irogers@...gle.com>,
        Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 1/9] perf tools: Add build id shell test

Em Wed, Sep 30, 2020 at 07:15:04PM +0200, Jiri Olsa escreveu:
> Adding test for build id cache that adds binary
> with sha1 and md5 build ids and verifies it's
> added properly.
> 
> The test updates build id cache with perf record
> and perf buildid-cache -a.


[root@...e ~]# perf test "build id"
82: build id cache operations                                       : Skip
[root@...e ~]# set -o vi
[root@...e ~]# perf test -v "build id"
82: build id cache operations                                       :
--- start ---
test child forked, pid 88384
failed: no test binaries
test child finished with -2
---- end ----
build id cache operations: Skip
[root@...e ~]#

Also the other patches clashed with Namhyung's patch series, can you
please check?

I've just pushed what I have to acme/perf/core

- Arnaldo
 
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> ---
>  tools/perf/Makefile.perf          | 14 +++++
>  tools/perf/tests/shell/buildid.sh | 90 +++++++++++++++++++++++++++++++
>  2 files changed, 104 insertions(+)
>  create mode 100755 tools/perf/tests/shell/buildid.sh
> 
> diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
> index 920d8afb9238..b2aeefa64e92 100644
> --- a/tools/perf/Makefile.perf
> +++ b/tools/perf/Makefile.perf
> @@ -126,6 +126,8 @@ include ../scripts/utilities.mak
>  #
>  # Define NO_LIBDEBUGINFOD if you do not want support debuginfod
>  #
> +# Define NO_BUILDID_EX if you do not want buildid-ex-* binaries
> +#
>  
>  # As per kernel Makefile, avoid funny character set dependencies
>  unexport LC_ALL
> @@ -349,6 +351,11 @@ ifndef NO_PERF_READ_VDSOX32
>  PROGRAMS += $(OUTPUT)perf-read-vdsox32
>  endif
>  
> +ifndef NO_BUILDID_EX
> +PROGRAMS += $(OUTPUT)buildid-ex-sha1
> +PROGRAMS += $(OUTPUT)buildid-ex-md5
> +endif
> +
>  LIBJVMTI = libperf-jvmti.so
>  
>  ifndef NO_JVMTI
> @@ -756,6 +763,13 @@ $(OUTPUT)perf-read-vdsox32: perf-read-vdso.c util/find-map.c
>  	$(QUIET_CC)$(CC) -mx32 $(filter -static,$(LDFLAGS)) -Wall -Werror -o $@ perf-read-vdso.c
>  endif
>  
> +ifndef NO_BUILDID_EX
> +$(OUTPUT)buildid-ex-sha1:
> +	$(QUIET_LINK)echo 'int main(void) { return 0; }' | $(CC) -Wl,--build-id=sha1 -o $@ -x c -
> +$(OUTPUT)buildid-ex-md5:
> +	$(QUIET_LINK)echo 'int main(void) { return 0; }' | $(CC) -Wl,--build-id=md5 -o $@ -x c -
> +endif
> +
>  ifndef NO_JVMTI
>  LIBJVMTI_IN := $(OUTPUT)jvmti/jvmti-in.o
>  
> diff --git a/tools/perf/tests/shell/buildid.sh b/tools/perf/tests/shell/buildid.sh
> new file mode 100755
> index 000000000000..57fcd28bc4bd
> --- /dev/null
> +++ b/tools/perf/tests/shell/buildid.sh
> @@ -0,0 +1,90 @@
> +#!/bin/sh
> +# build id cache operations
> +# SPDX-License-Identifier: GPL-2.0
> +
> +# skip if there are no test binaries
> +if [ ! -x buildid-ex-sha1 -a ! -x buildid-ex-md5 ]; then
> +	echo "failed: no test binaries"
> +	exit 2
> +fi
> +
> +# skip if there's no readelf
> +if [ ! -x `which readelf` ]; then
> +	echo "failed: no readelf, install binutils"
> +	exit 2
> +fi
> +
> +check()
> +{
> +	id=`readelf -n $1 2>/dev/null | grep 'Build ID' | awk '{print $3}'`
> +
> +	echo "build id: ${id}"
> +
> +	link=${build_id_dir}/.build-id/${id:0:2}/${id:2}
> +	echo "link: ${link}"
> +
> +	if [ ! -h $link ]; then
> +		echo "failed: link ${link} does not exist"
> +		exit 1
> +	fi
> +
> +	file=${build_id_dir}/.build-id/${id:0:2}/`readlink ${link}`/elf
> +	echo "file: ${file}"
> +
> +	if [ ! -x $file ]; then
> +		echo "failed: file ${file} does not exist"
> +		exit 1
> +	fi
> +
> +	diff ${file} ${1}
> +	if [ $? -ne 0 ]; then
> +		echo "failed: ${file} do not match"
> +		exit 1
> +	fi
> +
> +	echo "OK for ${1}"
> +}
> +
> +test_add()
> +{
> +	build_id_dir=$(mktemp -d /tmp/perf.debug.XXX)
> +	perf="perf --buildid-dir ${build_id_dir}"
> +
> +	${perf} buildid-cache -v -a ${1}
> +	if [ $? -ne 0 ]; then
> +		echo "failed: add ${1} to build id cache"
> +		exit 1
> +	fi
> +
> +	check ${1}
> +
> +	rm -rf ${build_id_dir}
> +}
> +
> +test_record()
> +{
> +	data=$(mktemp /tmp/perf.data.XXX)
> +	build_id_dir=$(mktemp -d /tmp/perf.debug.XXX)
> +	perf="perf --buildid-dir ${build_id_dir}"
> +
> +	${perf} record --buildid-all -o ${data} ${1}
> +	if [ $? -ne 0 ]; then
> +		echo "failed: record ${1}"
> +		exit 1
> +	fi
> +
> +	check ${1}
> +
> +	rm -rf ${build_id_dir}
> +	rm -rf ${data}
> +}
> +
> +# add binaries manual via perf buildid-cache -a
> +test_add buildid-ex-sha1
> +test_add buildid-ex-md5
> +
> +# add binaries via perf record post processing
> +test_record buildid-ex-sha1
> +test_record buildid-ex-md5
> +
> +exit ${err}
> -- 
> 2.26.2
> 

-- 

- Arnaldo