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from __future__ import absolute_import, division, unicode_literals
import cProfile
import os
from colorsys import hsv_to_rgb
from pstats import Stats
from django.utils import six
from django.utils.html import format_html
from django.utils.translation import ugettext_lazy as _
from debug_toolbar import settings as dt_settings
from debug_toolbar.panels import Panel
# Occasionally the disable method on the profiler is listed before
# the actual view functions. This function call should be ignored as
# it leads to an error within the tests.
INVALID_PROFILER_FUNC = '_lsprof.Profiler'
def contains_profiler(func_tuple):
"""Helper function that checks to see if the tuple contains
the INVALID_PROFILE_FUNC in any string value of the tuple."""
has_profiler = False
for value in func_tuple:
if isinstance(value, six.string_types):
has_profiler |= INVALID_PROFILER_FUNC in value
return has_profiler
class DjangoDebugToolbarStats(Stats):
__root = None
def get_root_func(self):
if self.__root is None:
for func, (cc, nc, tt, ct, callers) in self.stats.items():
if len(callers) == 0 and not contains_profiler(func):
self.__root = func
break
return self.__root
class FunctionCall(object):
def __init__(self, statobj, func, depth=0, stats=None,
id=0, parent_ids=[], hsv=(0, 0.5, 1)):
self.statobj = statobj
self.func = func
if stats:
self.stats = stats
else:
self.stats = statobj.stats[func][:4]
self.depth = depth
self.id = id
self.parent_ids = parent_ids
self.hsv = hsv
def parent_classes(self):
return self.parent_classes
def background(self):
r, g, b = hsv_to_rgb(*self.hsv)
return 'rgb(%f%%,%f%%,%f%%)' % (r * 100, g * 100, b * 100)
def func_std_string(self): # match what old profile produced
func_name = self.func
if func_name[:2] == ('~', 0):
# special case for built-in functions
name = func_name[2]
if name.startswith('<') and name.endswith('>'):
return '{%s}' % name[1:-1]
else:
return name
else:
file_name, line_num, method = self.func
idx = file_name.find('/site-packages/')
if idx > -1:
file_name = file_name[(idx + 14):]
file_path, file_name = file_name.rsplit(os.sep, 1)
return format_html(
'<span class="djdt-path">{0}/</span>'
'<span class="djdt-file">{1}</span>'
' in <span class="djdt-func">{3}</span>'
'(<span class="djdt-lineno">{2}</span>)',
file_path,
file_name,
line_num,
method)
def subfuncs(self):
i = 0
h, s, v = self.hsv
count = len(self.statobj.all_callees[self.func])
for func, stats in self.statobj.all_callees[self.func].items():
i += 1
h1 = h + (i / count) / (self.depth + 1)
if stats[3] == 0:
s1 = 0
else:
s1 = s * (stats[3] / self.stats[3])
yield FunctionCall(self.statobj,
func,
self.depth + 1,
stats=stats,
id=str(self.id) + '_' + str(i),
parent_ids=self.parent_ids + [self.id],
hsv=(h1, s1, 1))
def count(self):
return self.stats[1]
def tottime(self):
return self.stats[2]
def cumtime(self):
cc, nc, tt, ct = self.stats
return self.stats[3]
def tottime_per_call(self):
cc, nc, tt, ct = self.stats
if nc == 0:
return 0
return tt / nc
def cumtime_per_call(self):
cc, nc, tt, ct = self.stats
if cc == 0:
return 0
return ct / cc
def indent(self):
return 16 * self.depth
class ProfilingPanel(Panel):
"""
Panel that displays profiling information.
"""
title = _("Profiling")
template = 'debug_toolbar/panels/profiling.html'
def process_view(self, request, view_func, view_args, view_kwargs):
self.profiler = cProfile.Profile()
args = (request,) + view_args
return self.profiler.runcall(view_func, *args, **view_kwargs)
def add_node(self, func_list, func, max_depth, cum_time=0.1):
func_list.append(func)
func.has_subfuncs = False
if func.depth < max_depth:
for subfunc in func.subfuncs():
if subfunc.stats[3] >= cum_time:
func.has_subfuncs = True
self.add_node(func_list, subfunc, max_depth, cum_time=cum_time)
def generate_stats(self, request, response):
if not hasattr(self, 'profiler'):
return None
# Could be delayed until the panel content is requested (perf. optim.)
self.profiler.create_stats()
self.stats = DjangoDebugToolbarStats(self.profiler)
self.stats.calc_callees()
root_func = self.stats.get_root_func()
# Ensure root function exists before continuing with function call analysis
if root_func:
root = FunctionCall(self.stats, root_func, depth=0)
func_list = []
self.add_node(func_list,
root,
dt_settings.get_config()['PROFILER_MAX_DEPTH'],
root.stats[3] / 8)
self.record_stats({'func_list': func_list})
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