Add a script to parse backtrace output (#176)

Closes GH-175

Author: kou

dev/filter-backtrace.rb

@@ -0,0 +1,39 @@
+#!/usr/bin/env ruby
+#
+# 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.
+
+ARGF.each_line do |line|
+  puts(line)
+  case line
+  when /\A\s*([A-Za-z\d\/_.-]+)\(\+(0x\h+)\)/
+    path = $1
+    address = $2
+    IO.pipe do |input_read, input_write|
+      IO.pipe do |output_read, output_write|
+        pid = spawn("addr2line", "--exe=#{path}", "%#x" % address,
+                    in: input_read,
+                    out: output_write)
+        input_read.close
+        input_write.close
+        output_write.close
+        Process.waitpid(pid)
+        puts(output_read.read)
+      end
+    end
+  end
+end