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Viewing changes to Lib/test/crashers/borrowed_ref_2.py

  • Committer: Bazaar Package Importer
  • Author(s): Matthias Klose
  • Date: 2009-02-13 12:51:00 UTC
  • Revision ID: james.westby@ubuntu.com-20090213125100-uufgcb9yeqzujpqw
Tags: upstream-2.6.1
Import upstream version 2.6.1

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Lib/test/crashers/borrowed_ref_2.py
 
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"""
 
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_PyType_Lookup() returns a borrowed reference.
 
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This attacks PyObject_GenericSetAttr().
 
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NB. on my machine this crashes in 2.5 debug but not release.
 
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"""
 
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class A(object):
 
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    pass
 
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class B(object):
 
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    def __del__(self):
 
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        print "hi"
 
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        del C.d
 
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class D(object):
 
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    def __set__(self, obj, value):
 
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        self.hello = 42
 
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class C(object):
 
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    d = D()
 
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    def g():
 
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        pass
 
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c = C()
 
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a = A()
 
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a.cycle = a
 
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a.other = B()
 
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lst = [None] * 1000000
 
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i = 0
 
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del a
 
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while 1:
 
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    c.d = 42         # segfaults in PyMethod_New(im_func=D.__set__, im_self=d)
 
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    lst[i] = c.g     # consume the free list of instancemethod objects
 
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    i += 1