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"""
General-purpose reference tracker.
Usage: call track(obj).
"""
import sys, os, types
import gc
from rpython.translator.tool.graphpage import GraphPage, DotGen
from rpython.tool.uid import uid
MARKER = object()
class BaseRefTrackerPage(GraphPage):
def compute(self, objectlist):
assert objectlist[0] is MARKER
self.objectlist = objectlist
dotgen = DotGen('reftracker')
id2typename = {}
nodes = {}
edges = {}
def addedge(o1, o2):
key = (uid(o1), uid(o2))
edges[key] = self.edgelabel(o1, o2)
for i in range(1, len(objectlist)):
typename, s, linktext = self.formatobject(objectlist[i])
word = '0x%x' % uid(objectlist[i])
if linktext:
self.links[word] = linktext
s = '<%s> %s\\n%s' % (typename, word, s)
nodename = 'node%d' % len(nodes)
dotgen.emit_node(nodename, label=s, shape="box")
nodes[uid(objectlist[i])] = nodename
for o2 in self.get_referents(objectlist[i]):
if o2 is None:
continue
addedge(objectlist[i], o2)
id2typename[uid(o2)] = self.shortrepr(o2)
del o2
for o2 in self.get_referrers(objectlist[i]):
if o2 is None:
continue
if type(o2) is list and o2 and o2[0] is MARKER:
continue
addedge(o2, objectlist[i])
id2typename[uid(o2)] = self.shortrepr(o2)
del o2
for ids, label in edges.items():
for id1 in ids:
if id1 not in nodes:
nodename = 'node%d' % len(nodes)
word = '0x%x' % id1
s = '<%s> %s' % (id2typename[id1], word)
dotgen.emit_node(nodename, label=s)
nodes[id1] = nodename
self.links[word] = s
id1, id2 = ids
dotgen.emit_edge(nodes[id1], nodes[id2], label=label)
self.source = dotgen.generate(target=None)
def followlink(self, word):
id1 = int(word, 16)
found = None
objectlist = self.objectlist
for i in range(1, len(objectlist)):
for o2 in self.get_referents(objectlist[i]):
if uid(o2) == id1:
found = o2
for o2 in self.get_referrers(objectlist[i]):
if uid(o2) == id1:
found = o2
if found is not None:
objectlist = objectlist + [found]
else:
print '*** NOTE: object not found'
return self.newpage(objectlist)
def formatobject(self, o):
header = self.shortrepr(o, compact=False)
secondline = repr(o.__class__)
return header, secondline, repr(o)
def shortrepr(self, o, compact=True):
t = type(o)
if t is types.FrameType:
if compact:
return 'frame %r' % (o.f_code.co_name,)
else:
return 'frame %r' % (o.f_code,)
s = repr(o)
if len(s) > 50:
s = s[:20] + ' ... ' + s[-20:]
if s.startswith('<') and s.endswith('>'):
s = s[1:-1]
return s
def edgelabel(self, o1, o2):
return ''
def newpage(self, objectlist):
return self.__class__(objectlist)
class RefTrackerPage(BaseRefTrackerPage):
get_referrers = staticmethod(gc.get_referrers)
get_referents = staticmethod(gc.get_referents)
def edgelabel(self, o1, o2):
slst = []
if type(o1) in (list, tuple):
for i in range(len(o1)):
if o1[i] is o2:
slst.append('[%d]' % i)
elif type(o1) is dict:
for k, v in o1.items():
if v is o2:
slst.append('[%r]' % (k,))
else:
for basetype in type(o1).__mro__:
for key, value in basetype.__dict__.items():
if (type(value) is MemberDescriptorType or
type(value) is AttributeType):
try:
o1value = value.__get__(o1)
except:
pass
else:
if o1value is o2:
slst.append(str(key))
return ', '.join(slst)
def track(*objs):
"""Invoke a dot+pygame object reference tracker."""
page = RefTrackerPage([MARKER] + list(objs))
del objs
gc.collect()
gc.collect()
page.display()
def track_server(*objs, **kwds):
page = RefTrackerPage([MARKER] + list(objs))
del objs
gc.collect()
gc.collect()
try:
port = kwds.pop('port')
except KeyError:
port = 8888
from rpython.translator.tool.graphserver import run_server
run_server(page, port)
class _A(object):
__slots__ = 'a'
class _B(object):
pass
MemberDescriptorType = type(_A.a)
AttributeType = type(_B.__dict__['__dict__'])
if __name__ == '__main__':
try:
sys.path.remove(os.getcwd())
except ValueError:
pass
class A(object):
__slots__ = ['a']
d = {"lskjadldjslkj": "adjoiadoixmdoiemdwoi"}
a1 = A()
a1.a = d
track(d)
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