mDNSResponder-1310.40.42.tar.gz

[apple/mdnsresponder.git] / Platforms / ADK / Thread / adk-mem-parse.py

diff --git a/Platforms/ADK/Thread/adk-mem-parse.py b/Platforms/ADK/Thread/adk-mem-parse.py
new file mode 100644 (file)
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--- /dev/null
+++ b/Platforms/ADK/Thread/adk-mem-parse.py
@@ -0,0 +1,53 @@
+#!/usr/bin/env python3
+# Copyright (c) 2020 Apple Inc. All rights reserved.
+#
+# 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.
+#
+
+# This code parses an ADK log with MALLOC_DEBUG_LOGGING and eliminates matching alloc/free pairs.
+# It then prints a list of all allocations that have not yet been freed, and the file and line
+# number where they were allocated.  This can be useful for detecting leaks, although not everything
+# printed will be a leak: it could just be live data.
+
+import sys
+import re
+
+allocations = {}
+
+alloc_re = re.compile(r"^([0-9][0-9]*\.[0-9][0-9]*)\s+[A-Za-z][A-Za-z]*\s+(0x[0-9a-f][0-9a-f]*): (malloc|strdup|calloc)\((.*)\) at (.*)$")
+free_re = re.compile(r"^([0-9][0-9]*\.[0-9][0-9]*)\s+[A-Za-z][A-Za-z]*\s+(0x[0-9a-f][0-9a-f]*): (free)\((.*)\) at (.*)$")
+
+for line in sys.stdin:
+    line = line.strip()
+    matches = alloc_re.match(line)
+    if matches != None:
+        allocations[matches.group(2)] = matches
+    else:
+        matches = free_re.match(line)
+        if matches != None:
+            if matches.group(2) in allocations:
+                del allocations[matches.group(2)]
+            else:
+                print("mismatched free: ", line);
+
+leaks = {}
+for key, value in allocations.items():
+    if value.group(5) in leaks:
+        leaks[value.group(5)].append(value)
+    else:
+        leaks[value.group(5)] = [value]
+
+for key in sorted(leaks.keys()):
+    print("\nPossible leaks at: ", key)
+    for match in leaks[key]:
+        print("  ", match.group(2), " ", match.group(3), " ", match.group(4))