From e67bd55986c571e50b89749cd6195302682b8161 Mon Sep 17 00:00:00 2001
From: Michael Hanselmann <hansmi@google.com>
Date: Tue, 26 Aug 2008 15:44:34 +0000
Subject: [PATCH] Add simple lock debug output
Currently it can only be enabled by modifying utils.py, but we can
add a command line parameter later if needed.
Reviewed-by: schreiberal
---
lib/utils.py | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/lib/utils.py b/lib/utils.py
index e2ac3d36a..a861d7363 100644
--- a/lib/utils.py
+++ b/lib/utils.py
@@ -52,6 +52,7 @@ _locksheld = []
_re_shell_unquoted = re.compile('^[-.,=:/_+@A-Za-z0-9]+$')
debug = False
+debug_locks = False
no_fork = False
@@ -1202,14 +1203,22 @@ def LockedMethod(fn):
object's own lock which is hardcoded to '_lock'.
"""
+ def _LockDebug(*args, **kwargs):
+ if debug_locks:
+ logging.debug(*args, **kwargs)
+
def wrapper(self, *args, **kwargs):
assert hasattr(self, '_lock')
lock = self._lock
+ _LockDebug("Waiting for %s", lock)
lock.acquire()
try:
+ _LockDebug("Acquired %s", lock)
result = fn(self, *args, **kwargs)
finally:
+ _LockDebug("Releasing %s", lock)
lock.release()
+ _LockDebug("Released %s", lock)
return result
return wrapper
--
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