1 files changed, 55 insertions, 0 deletions
diff --git a/qpid/python/qpid/debug.py b/qpid/python/qpid/debug.py
new file mode 100644
index 0000000000..b5dbd4d9d9
--- /dev/null
+++ b/qpid/python/qpid/debug.py
@@ -0,0 +1,55 @@
+#
+# 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.
+#
+
+import threading, traceback, signal, sys, time
+
+def stackdump(sig, frm):
+  code = []
+  for threadId, stack in sys._current_frames().items():
+    code.append("\n# ThreadID: %s" % threadId)
+    for filename, lineno, name, line in traceback.extract_stack(stack):
+      code.append('File: "%s", line %d, in %s' % (filename, lineno, name))
+      if line:
+        code.append("  %s" % (line.strip()))
+  print "\n".join(code)
+
+signal.signal(signal.SIGQUIT, stackdump)
+
+class LoudLock:
+
+  def __init__(self):
+    self.lock = threading.RLock()
+
+  def acquire(self, blocking=1):
+    while not self.lock.acquire(blocking=0):
+      time.sleep(1)
+      print >> sys.out, "TRYING"
+      traceback.print_stack(None, None, out)
+      print >> sys.out, "TRYING"
+    print >> sys.out, "ACQUIRED"
+    traceback.print_stack(None, None, out)
+    print >> sys.out, "ACQUIRED"
+    return True
+
+  def _is_owned(self):
+    return self.lock._is_owned()
+
+  def release(self):
+    self.lock.release()
+