author | Sylvain Thénault <sylvain.thenault@logilab.fr> |
Fri, 26 Mar 2010 13:20:42 +0100 | |
branch | stable |
changeset 5035 | 8469d0acd949 |
parent 4870 | 101858d845f7 |
child 5421 | 8167de96c523 |
permissions | -rw-r--r-- |
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import gc, types, weakref |
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from cubicweb.schema import CubicWebRelationSchema, CubicWebEntitySchema |
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listiterator = type(iter([])) |
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IGNORE_CLASSES = ( |
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type, tuple, dict, list, set, frozenset, type(len), |
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weakref.ref, weakref.WeakKeyDictionary, |
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listiterator, |
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property, classmethod, |
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types.ModuleType, types.FunctionType, types.MethodType, |
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types.MemberDescriptorType, types.GetSetDescriptorType, |
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) |
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def _get_counted_class(obj, classes): |
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for cls in classes: |
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if isinstance(obj, cls): |
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return cls |
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raise AssertionError() |
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def gc_info(countclasses, |
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ignoreclasses=IGNORE_CLASSES, |
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viewreferrersclasses=(), showobjs=False, maxlevel=1): |
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gc.collect() |
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gc.collect() |
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counters = {} |
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ocounters = {} |
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for obj in gc.get_objects(): |
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if isinstance(obj, countclasses): |
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cls = _get_counted_class(obj, countclasses) |
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try: |
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counters[cls.__name__] += 1 |
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except KeyError: |
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counters[cls.__name__] = 1 |
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elif not isinstance(obj, ignoreclasses): |
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try: |
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key = '%s.%s' % (obj.__class__.__module__, |
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obj.__class__.__name__) |
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except AttributeError: |
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key = str(obj) |
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try: |
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ocounters[key] += 1 |
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except KeyError: |
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ocounters[key] = 1 |
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if isinstance(obj, viewreferrersclasses): |
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print ' ', obj, referrers(obj, showobjs, maxlevel) |
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return counters, ocounters, gc.garbage |
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def referrers(obj, showobj=False, maxlevel=1): |
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objreferrers = _referrers(obj, maxlevel) |
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try: |
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return sorted(set((type(x), showobj and x or getattr(x, '__name__', '%#x' % id(x))) |
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for x in objreferrers)) |
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except TypeError: |
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s = set() |
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unhashable = [] |
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for x in objreferrers: |
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try: |
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s.add(x) |
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except TypeError: |
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unhashable.append(x) |
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return sorted(s) + unhashable |
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def _referrers(obj, maxlevel, _seen=None, _level=0): |
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interesting = [] |
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if _seen is None: |
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_seen = set() |
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for x in gc.get_referrers(obj): |
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if id(x) in _seen: |
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continue |
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_seen.add(id(x)) |
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if isinstance(x, types.FrameType): |
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continue |
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if isinstance(x, (CubicWebRelationSchema, CubicWebEntitySchema)): |
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continue |
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if isinstance(x, (list, tuple, set, dict, listiterator)): |
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if _level >= maxlevel: |
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pass |
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#interesting.append(x) |
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else: |
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interesting += _referrers(x, maxlevel, _seen, _level+1) |
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else: |
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interesting.append(x) |
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return interesting |