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from pydevd_constants import DictContains
import sys
import pydevd_vars
from os.path import basename
import traceback
try:
from urllib import quote, quote_plus, unquote, unquote_plus
except:
from urllib.parse import quote, quote_plus, unquote, unquote_plus #@Reimport @UnresolvedImport
#===================================================================================================
# print_var_node
#===================================================================================================
def print_var_node(xml_node, stream):
name = xml_node.getAttribute('name')
value = xml_node.getAttribute('value')
val_type = xml_node.getAttribute('type')
found_as = xml_node.getAttribute('found_as')
stream.write('Name: ')
stream.write(unquote_plus(name))
stream.write(', Value: ')
stream.write(unquote_plus(value))
stream.write(', Type: ')
stream.write(unquote_plus(val_type))
if found_as:
stream.write(', Found as: %s' % (unquote_plus(found_as),))
stream.write('\n')
#===================================================================================================
# print_referrers
#===================================================================================================
def print_referrers(obj, stream=None):
if stream is None:
stream = sys.stdout
result = get_referrer_info(obj)
from xml.dom.minidom import parseString
dom = parseString(result)
xml = dom.getElementsByTagName('xml')[0]
for node in xml.childNodes:
if node.nodeType == node.TEXT_NODE:
continue
if node.localName == 'for':
stream.write('Searching references for: ')
for child in node.childNodes:
if child.nodeType == node.TEXT_NODE:
continue
print_var_node(child, stream)
elif node.localName == 'var':
stream.write('Referrer found: ')
print_var_node(node, stream)
else:
sys.stderr.write('Unhandled node: %s\n' % (node,))
return result
#===================================================================================================
# get_referrer_info
#===================================================================================================
def get_referrer_info(searched_obj):
DEBUG = 0
if DEBUG:
sys.stderr.write('Getting referrers info.\n')
try:
try:
if searched_obj is None:
ret = ['<xml>\n']
ret.append('<for>\n')
ret.append(pydevd_vars.varToXML(
searched_obj,
'Skipping getting referrers for None',
additionalInXml=' id="%s"' % (id(searched_obj),)))
ret.append('</for>\n')
ret.append('</xml>')
ret = ''.join(ret)
return ret
obj_id = id(searched_obj)
try:
if DEBUG:
sys.stderr.write('Getting referrers...\n')
import gc
referrers = gc.get_referrers(searched_obj)
except:
traceback.print_exc()
ret = ['<xml>\n']
ret.append('<for>\n')
ret.append(pydevd_vars.varToXML(
searched_obj,
'Exception raised while trying to get_referrers.',
additionalInXml=' id="%s"' % (id(searched_obj),)))
ret.append('</for>\n')
ret.append('</xml>')
ret = ''.join(ret)
return ret
if DEBUG:
sys.stderr.write('Found %s referrers.\n' % (len(referrers),))
curr_frame = sys._getframe()
frame_type = type(curr_frame)
#Ignore this frame and any caller frame of this frame
ignore_frames = {} #Should be a set, but it's not available on all python versions.
while curr_frame is not None:
if basename(curr_frame.f_code.co_filename).startswith('pydev'):
ignore_frames[curr_frame] = 1
curr_frame = curr_frame.f_back
ret = ['<xml>\n']
ret.append('<for>\n')
if DEBUG:
sys.stderr.write('Searching Referrers of obj with id="%s"\n' % (obj_id,))
ret.append(pydevd_vars.varToXML(
searched_obj,
'Referrers of obj with id="%s"' % (obj_id,)))
ret.append('</for>\n')
all_objects = None
for r in referrers:
try:
if DictContains(ignore_frames, r):
continue #Skip the references we may add ourselves
except:
pass #Ok: unhashable type checked...
if r is referrers:
continue
r_type = type(r)
r_id = str(id(r))
representation = str(r_type)
found_as = ''
if r_type == frame_type:
if DEBUG:
sys.stderr.write('Found frame referrer: %r\n' % (r,))
for key, val in r.f_locals.items():
if val is searched_obj:
found_as = key
break
elif r_type == dict:
if DEBUG:
sys.stderr.write('Found dict referrer: %r\n' % (r,))
# Try to check if it's a value in the dict (and under which key it was found)
for key, val in r.items():
if val is searched_obj:
found_as = key
if DEBUG:
sys.stderr.write(' Found as %r in dict\n' % (found_as,))
break
#Ok, there's one annoying thing: many times we find it in a dict from an instance,
#but with this we don't directly have the class, only the dict, so, to workaround that
#we iterate over all reachable objects ad check if one of those has the given dict.
if all_objects is None:
all_objects = gc.get_objects()
for x in all_objects:
try:
if getattr(x, '__dict__', None) is r:
r = x
r_type = type(x)
r_id = str(id(r))
representation = str(r_type)
break
except:
pass #Just ignore any error here (i.e.: ReferenceError, etc.)
elif r_type in (tuple, list):
if DEBUG:
sys.stderr.write('Found tuple referrer: %r\n' % (r,))
#Don't use enumerate() because not all Python versions have it.
i = 0
for x in r:
if x is searched_obj:
found_as = '%s[%s]' % (r_type.__name__, i)
if DEBUG:
sys.stderr.write(' Found as %s in tuple: \n' % (found_as,))
break
i += 1
if found_as:
found_as = ' found_as="%s"' % (pydevd_vars.makeValidXmlValue(found_as),)
ret.append(pydevd_vars.varToXML(
r,
representation,
additionalInXml=' id="%s"%s' % (r_id, found_as)))
finally:
if DEBUG:
sys.stderr.write('Done searching for references.\n')
#If we have any exceptions, don't keep dangling references from this frame to any of our objects.
all_objects = None
referrers = None
searched_obj = None
r = None
x = None
key = None
val = None
curr_frame = None
ignore_frames = None
except:
traceback.print_exc()
ret = ['<xml>\n']
ret.append('<for>\n')
ret.append(pydevd_vars.varToXML(
searched_obj,
'Error getting referrers for:',
additionalInXml=' id="%s"' % (id(searched_obj),)))
ret.append('</for>\n')
ret.append('</xml>')
ret = ''.join(ret)
return ret
ret.append('</xml>')
ret = ''.join(ret)
return ret
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