perf-buildid-cache.sh: New script to build perf's buildid cache

... from perf's *.data files.  It now appears that we are not going
to use this script, and instead generate per-run buildid cache
using perf-record.  Still, this might come handy one day.

Change-Id: Ib0b17bfa38762d4845875bff49c1e36df8479815

1 files changed, 43 insertions, 0 deletions

diff --git a/perf-buildid-cache.sh b/perf-buildid-cache.sh
new file mode 100755
index 0000000..9b52ab6
--- /dev/null
+++ b/perf-buildid-cache.sh
@@ -0,0 +1,43 @@
+#!/bin/bash
+
+set -e
+
+missing=$(mktemp /tmp/perf-buildid-missing.XXXXXX)
+trap "rm -rf $missing" EXIT
+
+cachedir=""
+verbose=""
+
+OPTS="`getopt -o vd: -l cachedir:,verbose -- "$@"`"
+while test $# -gt 0; do
+    case $1 in
+	--cachedir|-d) cachedir="$2"; shift ;;
+	--verbose|-v) verbose="set -x" ;;
+	--) shift; break ;;
+    esac
+    shift
+done
+
+$verbose
+
+if [ x"$cachedir" = x"" ]; then
+    echo "ERROR: No --cachedir option"
+    exit 1
+fi
+
+for data in "$@"; do
+    perf --buildid-dir $cachedir buildid-cache --missing $data > $missing
+    while read line; do
+	build_id=$(echo $line | cut -d " " -f 1)
+	file=$(echo $line | cut -d " " -f 2)
+	if [ x"$file" = x"[kernel.kallsyms]" ]; then
+	    mkdir -p $cachedir/[kernel.kallsyms]/
+	    cp /proc/kallsyms $cachedir/[kernel.kallsyms]/$build_id
+	    chmod +x $cachedir/[kernel.kallsyms]/$build_id
+	    mkdir -p $cachedir/.build-id/${build_id:0:2}
+	    ln -s ../../[kernel.kallsyms]/$build_id $cachedir/.build-id/${build_id:0:2}/${build_id:2}
+	else
+	    perf --buildid-dir $cachedir buildid-cache -a $file
+	fi
+    done < $missing
+done