_gcdebug.py
author Julien Cristau <julien.cristau@logilab.fr>
Thu, 10 Oct 2013 10:02:29 +0200
branchstable
changeset 9306 8ab0e601d418
parent 5424 8ecbcbff9777
child 10310 b49761555ad6
permissions -rw-r--r--
[web] don't rename resources in gen-static-datadir We should use the result from WebConfiguration.locate_resource to know which file to copy, not what name to copy it to. The destination file should be the name of the resource, as the client will request it. This matters in the case of cubicweb.css which locate_resource might rewrite to cubicweb.old.css. Closes #3206129

# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.

import gc, types, weakref

from cubicweb.schema import CubicWebRelationSchema, CubicWebEntitySchema

listiterator = type(iter([]))

IGNORE_CLASSES = (
    type, tuple, dict, list, set, frozenset, type(len),
    weakref.ref, weakref.WeakKeyDictionary,
    listiterator,
    property, classmethod,
    types.ModuleType, types.FunctionType, types.MethodType,
    types.MemberDescriptorType, types.GetSetDescriptorType,
    )

def _get_counted_class(obj, classes):
    for cls in classes:
        if isinstance(obj, cls):
            return cls
    raise AssertionError()

def gc_info(countclasses,
            ignoreclasses=IGNORE_CLASSES,
            viewreferrersclasses=(), showobjs=False, maxlevel=1):
    gc.collect()
    gc.collect()
    counters = {}
    ocounters = {}
    for obj in gc.get_objects():
        if isinstance(obj, countclasses):
            cls = _get_counted_class(obj, countclasses)
            try:
                counters[cls.__name__] += 1
            except KeyError:
                counters[cls.__name__] = 1
        elif not isinstance(obj, ignoreclasses):
            try:
                key = '%s.%s' % (obj.__class__.__module__,
                                 obj.__class__.__name__)
            except AttributeError:
                key = str(obj)
            try:
                ocounters[key] += 1
            except KeyError:
                ocounters[key] = 1
        if isinstance(obj, viewreferrersclasses):
            print '   ', obj, referrers(obj, showobjs, maxlevel)
    return counters, ocounters, gc.garbage


def referrers(obj, showobj=False, maxlevel=1):
    objreferrers = _referrers(obj, maxlevel)
    try:
        return sorted(set((type(x), showobj and x or getattr(x, '__name__', '%#x' % id(x)))
                          for x in objreferrers))
    except TypeError:
        s = set()
        unhashable = []
        for x in objreferrers:
            try:
                s.add(x)
            except TypeError:
                unhashable.append(x)
        return sorted(s) + unhashable

def _referrers(obj, maxlevel, _seen=None, _level=0):
    interesting = []
    if _seen is None:
        _seen = set()
    for x in gc.get_referrers(obj):
        if id(x) in _seen:
            continue
        _seen.add(id(x))
        if isinstance(x, types.FrameType):
            continue
        if isinstance(x, (CubicWebRelationSchema, CubicWebEntitySchema)):
            continue
        if isinstance(x, (list, tuple, set, dict, listiterator)):
            if _level >= maxlevel:
                pass
                #interesting.append(x)
            else:
                interesting += _referrers(x, maxlevel, _seen, _level+1)
        else:
            interesting.append(x)
    return interesting