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35c8658a74
svn+ssh://pythondev@svn.python.org/python/trunk ........ r64119 | andrew.kuchling | 2008-06-11 14:53:14 +0200 (mer., 11 juin 2008) | 1 line Note PEP 371 section ........ r64147 | benjamin.peterson | 2008-06-11 22:04:30 +0200 (mer., 11 juin 2008) | 2 lines update ACKS and NEWs for multiprocessing ........ r64150 | georg.brandl | 2008-06-11 22:28:06 +0200 (mer., 11 juin 2008) | 2 lines Can we agree to put dots at entry ends? Thanks. ........ r64165 | armin.rigo | 2008-06-12 11:50:58 +0200 (jeu., 12 juin 2008) | 3 lines Sounds obvious, but I didn't even realize that you can put non-string keys in type dictionaries without using this locals() hack. ........ r64219 | neal.norwitz | 2008-06-13 08:00:46 +0200 (ven., 13 juin 2008) | 1 line Check for memory alloc failure ........ r64220 | neal.norwitz | 2008-06-13 08:02:26 +0200 (ven., 13 juin 2008) | 3 lines Fix some memory dealloc problems when exceptions occur. It caused: "Fatal Python error: UNREF invalid object" in the DoubleTest. ........ r64221 | neal.norwitz | 2008-06-13 08:03:25 +0200 (ven., 13 juin 2008) | 3 lines Fix typo in method name. The LT class implemented less than. The LE class should implement less than or equal to (as the code does). ........ r64229 | georg.brandl | 2008-06-13 15:26:54 +0200 (ven., 13 juin 2008) | 2 lines Clarification. ........ r64230 | robert.schuppenies | 2008-06-13 15:29:37 +0200 (ven., 13 juin 2008) | 2 lines Fixed: sys.getsizeof does not take the actual length of the tuples into account. ........ r64233 | benjamin.peterson | 2008-06-13 17:11:50 +0200 (ven., 13 juin 2008) | 2 lines platform.uname now tries to fill empty values even when os.uname is present ........ r64235 | benjamin.peterson | 2008-06-13 17:41:09 +0200 (ven., 13 juin 2008) | 1 line set svn:ignore on multiprocessing ........ r64253 | andrew.kuchling | 2008-06-13 21:38:18 +0200 (ven., 13 juin 2008) | 1 line Typo fixes ........ r64278 | martin.v.loewis | 2008-06-14 16:24:47 +0200 (sam., 14 juin 2008) | 2 lines Disable UAC by default. ........ r64280 | gregory.p.smith | 2008-06-14 19:34:09 +0200 (sam., 14 juin 2008) | 3 lines silence the test when it is skipped on some platforms. should fix a buildbot. ........ r64301 | georg.brandl | 2008-06-15 21:54:36 +0200 (dim., 15 juin 2008) | 2 lines Forward-port new test from r64300. ........ r64303 | raymond.hettinger | 2008-06-16 03:42:40 +0200 (lun., 16 juin 2008) | 1 line Issue 3116: fix quadratic behavior in marshal.dumps(). ........ r64320 | georg.brandl | 2008-06-16 23:00:47 +0200 (lun., 16 juin 2008) | 2 lines Add Jesse Noller to the developers list. ........ r64328 | georg.brandl | 2008-06-17 11:01:35 +0200 (mar., 17 juin 2008) | 2 lines Split the HTML index. ........ r64338 | vinay.sajip | 2008-06-17 13:02:14 +0200 (mar., 17 juin 2008) | 1 line Bug #3126: StreamHandler and FileHandler check before calling "flush" and "close" that the stream object has these, using hasattr (thanks to bobf for the patch). ........ r64339 | vinay.sajip | 2008-06-17 13:04:02 +0200 (mar., 17 juin 2008) | 1 line Updated with fix for #3126. ........
35 lines
1.1 KiB
Python
35 lines
1.1 KiB
Python
"""
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There is a way to put keys of any type in a type's dictionary.
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I think this allows various kinds of crashes, but so far I have only
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found a convoluted attack of _PyType_Lookup(), which uses the mro of the
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type without holding a strong reference to it. Probably works with
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super.__getattribute__() too, which uses the same kind of code.
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"""
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class MyKey(object):
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def __hash__(self):
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return hash('mykey')
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def __cmp__(self, other):
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# the following line decrefs the previous X.__mro__
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X.__bases__ = (Base2,)
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# trash all tuples of length 3, to make sure that the items of
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# the previous X.__mro__ are really garbage
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z = []
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for i in range(1000):
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z.append((i, None, None))
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return -1
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class Base(object):
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mykey = 'from Base'
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class Base2(object):
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mykey = 'from Base2'
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# you can't add a non-string key to X.__dict__, but it can be
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# there from the beginning :-)
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X = type('X', (Base,), {MyKey(): 5})
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print(X.mykey)
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# I get a segfault, or a slightly wrong assertion error in a debug build.
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