Add copyright and usage

1 files changed, 23 insertions, 3 deletions

diff --git a/tools/debug/core/error_ref_leak.py b/tools/debug/core/error_ref_leak.py
index 99f986a97b..6582328a5b 100644
--- a/tools/debug/core/error_ref_leak.py
+++ b/tools/debug/core/error_ref_leak.py
@@ -1,4 +1,23 @@
-#!/bin/python
+#!/usr/bin/env python2.7
+#
+# Copyright 2017 gRPC authors.
+#
+# Licensed 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.
+
+# Reads stdin to find error_refcount log lines, and prints reference leaks
+# to stdout
+
+# usege: python error_ref_leak < logfile.txt
 
 import sys
 import re
@@ -7,7 +26,9 @@ data = sys.stdin.readlines()
 
 errs = []
 for line in data:
+  # if we care about the line
   if re.search(r'error.cc', line):
+    # str manip to cut off left part of log line
     line = line.partition('error.cc:')[-1]
     line = re.sub(r'\d+] ', r'', line)
     line = line.strip().split()
@@ -18,9 +39,8 @@ for line in data:
     elif line[0] == "realloc":
       errs.remove(line[1])
       errs.append(line[3])
+    # explicitly look for the last dereference 
     elif line[1] == "1" and line[3] == "0":
-      # print line
-      # print err, errs
       assert(err in errs)
       errs.remove(err)