_gcdebug.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Tue, 30 Jun 2015 10:06:00 +0200
changeset 10914 fed8bd56f223
parent 10589 7c23b7de2b8d
permissions -rw-r--r--
[repository] deprecate the extid2eid based multi-sources API This API is cumbersome and lead to obfuscated code because of the callback mecanism implied when some entity has to be created. Since we dropped the "true" multi-source, this mecanism is not needed anymore and one should prefer to use the dataimport API inside its parser instead. Notice the cwxml parser will trigger the deprecation warning, it should not be used anymore in favor of ad-hoc parsers.
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# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
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#
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# This file is part of CubicWeb.
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#
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# CubicWeb is free software: you can redistribute it and/or modify it under the
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# terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
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from __future__ import print_function
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import gc, types, weakref
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from cubicweb.schema import CubicWebRelationSchema, CubicWebEntitySchema
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try:
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    from cubicweb.web.request import _NeedAuthAccessMock
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except ImportError:
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    _NeedAuthAccessMock = None
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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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if _NeedAuthAccessMock is not None:
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    IGNORE_CLASSES = IGNORE_CLASSES + (_NeedAuthAccessMock,)
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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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    garbage = [repr(obj) for obj in gc.garbage]
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    return counters, ocounters, 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