#!/bin/bash
#
# 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.
#

# displays a jstack thread dump for a single named thread
#
# takes a PID as first argument and the thread name as second argument

jstack $1 | awk -v thread_name="$2" '
{
  if (!match($0,"[^\\s]")) active=0;
  else if (substr($0,1,1)=="\"") active= $1==("\"" thread_name "\"")
  if (active) {
       print $0
  }
}
'