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ec4d0a7680
A non-existent build-id used to be treated as all-zero SHA-1 hash. Build-ids are now variable width. A non-existent build-id is an empty string and "perf buildid-list" pads this with spaces. This is true even when using old perf.data files recorded from older versions of perf; "perf buildid-list" never reports an all-zero hash anymore. This fixes "perf-archive" to skip missing build-ids by skipping lines that start with a padding space rather than with zeroes. Signed-off-by: Nicholas Fraser <nfraser@codeweavers.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Huw Davies <huw@codeweavers.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ulrich Czekalla <uczekalla@codeweavers.com> Link: https://lore.kernel.org/r/442bffc7-ac5c-0975-b876-a549efce2413@codeweavers.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
48 lines
1.2 KiB
Bash
48 lines
1.2 KiB
Bash
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# perf archive
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# Arnaldo Carvalho de Melo <acme@redhat.com>
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PERF_DATA=perf.data
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if [ $# -ne 0 ] ; then
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PERF_DATA=$1
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fi
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#
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# PERF_BUILDID_DIR environment variable set by perf
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# path to buildid directory, default to $HOME/.debug
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#
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if [ -z $PERF_BUILDID_DIR ]; then
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PERF_BUILDID_DIR=~/.debug/
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else
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# append / to make substitutions work
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PERF_BUILDID_DIR=$PERF_BUILDID_DIR/
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fi
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BUILDIDS=$(mktemp /tmp/perf-archive-buildids.XXXXXX)
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perf buildid-list -i $PERF_DATA --with-hits | grep -v "^ " > $BUILDIDS
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if [ ! -s $BUILDIDS ] ; then
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echo "perf archive: no build-ids found"
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rm $BUILDIDS || true
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exit 1
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fi
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MANIFEST=$(mktemp /tmp/perf-archive-manifest.XXXXXX)
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PERF_BUILDID_LINKDIR=$(readlink -f $PERF_BUILDID_DIR)/
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cut -d ' ' -f 1 $BUILDIDS | \
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while read build_id ; do
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linkname=$PERF_BUILDID_DIR.build-id/${build_id:0:2}/${build_id:2}
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filename=$(readlink -f $linkname)
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echo ${linkname#$PERF_BUILDID_DIR} >> $MANIFEST
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echo ${filename#$PERF_BUILDID_LINKDIR} >> $MANIFEST
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done
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tar cjf $PERF_DATA.tar.bz2 -C $PERF_BUILDID_DIR -T $MANIFEST
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rm $MANIFEST $BUILDIDS || true
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echo -e "Now please run:\n"
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echo -e "$ tar xvf $PERF_DATA.tar.bz2 -C ~/.debug\n"
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echo "wherever you need to run 'perf report' on."
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exit 0
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