Python console

6 files changed, 87 insertions, 0 deletions

diff --git a/src/python/stdlib/test/leakers/README.txt b/src/python/stdlib/test/leakers/README.txt
new file mode 100644
index 0000000..beeee0e
--- /dev/null
+++ b/src/python/stdlib/test/leakers/README.txt
@@ -0,0 +1,32 @@
+This directory contains test cases that are known to leak references.
+The idea is that you can import these modules while in the interpreter
+and call the leak function repeatedly.  This will only be helpful if
+the interpreter was built in debug mode.  If the total ref count
+doesn't increase, the bug has been fixed and the file should be removed
+from the repository.
+
+Note:  be careful to check for cyclic garbage.  Sometimes it may be helpful
+to define the leak function like:
+
+def leak():
+    def inner_leak():
+        # this is the function that leaks, but also creates cycles
+    inner_leak()
+    gc.collect() ; gc.collect() ; gc.collect()
+
+Here's an example interpreter session for test_gestalt which still leaks:
+
+>>> from test.leakers.test_gestalt import leak
+[24275 refs]
+>>> leak()
+[28936 refs]
+>>> leak()
+[28938 refs]
+>>> leak()
+[28940 refs]
+>>> 
+
+Once the leak is fixed, the test case should be moved into an appropriate
+test (even if it was originally from the test suite).  This ensures the
+regression doesn't happen again.  And if it does, it should be easier
+to track down.
diff --git a/src/python/stdlib/test/leakers/__init__.py b/src/python/stdlib/test/leakers/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/src/python/stdlib/test/leakers/__init__.py
diff --git a/src/python/stdlib/test/leakers/test_ctypes.py b/src/python/stdlib/test/leakers/test_ctypes.py
new file mode 100644
index 0000000..0f9a2cd
--- /dev/null
+++ b/src/python/stdlib/test/leakers/test_ctypes.py
@@ -0,0 +1,16 @@
+
+# Taken from Lib/ctypes/test/test_keeprefs.py, PointerToStructure.test().
+# When this leak is fixed, remember to remove from Misc/build.sh LEAKY_TESTS.
+
+from ctypes import Structure, c_int, POINTER
+import gc
+
+def leak_inner():
+    class POINT(Structure):
+        _fields_ = [("x", c_int)]
+    class RECT(Structure):
+        _fields_ = [("a", POINTER(POINT))]
+
+def leak():
+    leak_inner()
+    gc.collect()
diff --git a/src/python/stdlib/test/leakers/test_dictself.py b/src/python/stdlib/test/leakers/test_dictself.py
new file mode 100644
index 0000000..99bd37d
--- /dev/null
+++ b/src/python/stdlib/test/leakers/test_dictself.py
@@ -0,0 +1,12 @@
+'''Test case for "self.__dict__ = self" circular reference bug (#1469629)'''
+
+import gc
+
+class LeakyDict(dict):
+    pass
+
+def leak():
+    ld = LeakyDict()
+    ld.__dict__ = ld
+    del ld
+    gc.collect(); gc.collect(); gc.collect()
diff --git a/src/python/stdlib/test/leakers/test_gestalt.py b/src/python/stdlib/test/leakers/test_gestalt.py
new file mode 100644
index 0000000..46bfcc8
--- /dev/null
+++ b/src/python/stdlib/test/leakers/test_gestalt.py
@@ -0,0 +1,14 @@
+import sys
+
+if sys.platform != 'darwin':
+    raise ValueError, "This test only leaks on Mac OS X"
+
+def leak():
+    # taken from platform._mac_ver_lookup()
+    from gestalt import gestalt
+    import MacOS
+
+    try:
+        gestalt('sysu')
+    except MacOS.Error:
+        pass
diff --git a/src/python/stdlib/test/leakers/test_selftype.py b/src/python/stdlib/test/leakers/test_selftype.py
new file mode 100644
index 0000000..4207c32
--- /dev/null
+++ b/src/python/stdlib/test/leakers/test_selftype.py
@@ -0,0 +1,13 @@
+# Reference cycles involving only the ob_type field are rather uncommon
+# but possible.  Inspired by SF bug 1469629.
+
+import gc
+
+def leak():
+    class T(type):
+        pass
+    class U(type):
+        __metaclass__ = T
+    U.__class__ = U
+    del U
+    gc.collect(); gc.collect(); gc.collect()