tools: Add showstack.sh to parse *.su files

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

tools/showstack.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+############################################################################
+# tools/showstack.sh
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+function analyse()
+{
+  sufiles=$(find $1 -name "*.su")
+  if [[ $sufiles != "" ]]
+  then
+    echo $sufiles | xargs -n1 cat | awk -F'\t' '{print $2", "$1}' | sort -n -r | head -n $2
+  fi
+}
+
+if [[ $# == 0 ]]; then
+  echo "usage: $0 <dir>..."
+  exit
+fi
+
+for dir in $@; do
+  analyse $dir 20
+done