/usr/lib/python3/dist-packages/Cython/Coverage.py is in cython3 0.25.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 | """
A Cython plugin for coverage.py
Requires the coverage package at least in version 4.0 (which added the plugin API).
"""
from __future__ import absolute_import
import re
import os.path
import sys
from collections import defaultdict
from coverage.plugin import CoveragePlugin, FileTracer, FileReporter # requires coverage.py 4.0+
from .Utils import find_root_package_dir, is_package_dir, open_source_file
from . import __version__
def _find_c_source(base_path):
if os.path.exists(base_path + '.c'):
c_file = base_path + '.c'
elif os.path.exists(base_path + '.cpp'):
c_file = base_path + '.cpp'
else:
c_file = None
return c_file
def _find_dep_file_path(main_file, file_path):
abs_path = os.path.abspath(file_path)
if file_path.endswith('.pxi') and not os.path.exists(abs_path):
# include files are looked up relative to the main source file
pxi_file_path = os.path.join(os.path.dirname(main_file), file_path)
if os.path.exists(pxi_file_path):
abs_path = os.path.abspath(pxi_file_path)
# search sys.path for external locations if a valid file hasn't been found
if not os.path.exists(abs_path):
for sys_path in sys.path:
test_path = os.path.realpath(os.path.join(sys_path, file_path))
if os.path.exists(test_path):
return test_path
return abs_path
class Plugin(CoveragePlugin):
# map from traced file paths to absolute file paths
_file_path_map = None
# map from traced file paths to corresponding C files
_c_files_map = None
# map from parsed C files to their content
_parsed_c_files = None
def sys_info(self):
return [('Cython version', __version__)]
def file_tracer(self, filename):
"""
Try to find a C source file for a file path found by the tracer.
"""
if filename.startswith('<') or filename.startswith('memory:'):
return None
c_file = py_file = None
filename = os.path.abspath(filename)
if self._c_files_map and filename in self._c_files_map:
c_file = self._c_files_map[filename][0]
if c_file is None:
c_file, py_file = self._find_source_files(filename)
if not c_file:
return None
# parse all source file paths and lines from C file
# to learn about all relevant source files right away (pyx/pxi/pxd)
# FIXME: this might already be too late if the first executed line
# is not from the main .pyx file but a file with a different
# name than the .c file (which prevents us from finding the
# .c file)
self._parse_lines(c_file, filename)
if self._file_path_map is None:
self._file_path_map = {}
return CythonModuleTracer(filename, py_file, c_file, self._c_files_map, self._file_path_map)
def file_reporter(self, filename):
# TODO: let coverage.py handle .py files itself
#ext = os.path.splitext(filename)[1].lower()
#if ext == '.py':
# from coverage.python import PythonFileReporter
# return PythonFileReporter(filename)
filename = os.path.abspath(filename)
if self._c_files_map and filename in self._c_files_map:
c_file, rel_file_path, code = self._c_files_map[filename]
else:
c_file, _ = self._find_source_files(filename)
if not c_file:
return None # unknown file
rel_file_path, code = self._parse_lines(c_file, filename)
return CythonModuleReporter(c_file, filename, rel_file_path, code)
def _find_source_files(self, filename):
basename, ext = os.path.splitext(filename)
ext = ext.lower()
if ext in ('.py', '.pyx', '.pxd', '.c', '.cpp'):
pass
elif ext in ('.so', '.pyd'):
platform_suffix = re.search(r'[.]cpython-[0-9]+[a-z]*$', basename, re.I)
if platform_suffix:
basename = basename[:platform_suffix.start()]
elif ext == '.pxi':
# if we get here, it means that the first traced line of a Cython module was
# not in the main module but in an include file, so try a little harder to
# find the main source file
self._find_c_source_files(os.path.dirname(filename), filename)
if filename in self._c_files_map:
return self._c_files_map[filename][0], None
else:
# none of our business
return None, None
c_file = filename if ext in ('.c', '.cpp') else _find_c_source(basename)
if c_file is None:
# a module "pkg/mod.so" can have a source file "pkg/pkg.mod.c"
package_root = find_root_package_dir.uncached(filename)
package_path = os.path.relpath(basename, package_root).split(os.path.sep)
if len(package_path) > 1:
test_basepath = os.path.join(os.path.dirname(filename), '.'.join(package_path))
c_file = _find_c_source(test_basepath)
py_source_file = None
if c_file:
py_source_file = os.path.splitext(c_file)[0] + '.py'
if not os.path.exists(py_source_file):
py_source_file = None
try:
with open(c_file, 'rb') as f:
if b'/* Generated by Cython ' not in f.read(30):
return None, None # not a Cython file
except (IOError, OSError):
c_file = None
return c_file, py_source_file
def _find_c_source_files(self, dir_path, source_file):
"""
Desperately parse all C files in the directory or its package parents
(not re-descending) to find the (included) source file in one of them.
"""
if not os.path.isdir(dir_path):
return
splitext = os.path.splitext
for filename in os.listdir(dir_path):
ext = splitext(filename)[1].lower()
if ext in ('.c', '.cpp'):
self._parse_lines(os.path.join(dir_path, filename), source_file)
if source_file in self._c_files_map:
return
# not found? then try one package up
if is_package_dir(dir_path):
self._find_c_source_files(os.path.dirname(dir_path), source_file)
def _parse_lines(self, c_file, sourcefile):
"""
Parse a Cython generated C/C++ source file and find the executable lines.
Each executable line starts with a comment header that states source file
and line number, as well as the surrounding range of source code lines.
"""
if self._parsed_c_files is None:
self._parsed_c_files = {}
if c_file in self._parsed_c_files:
code_lines = self._parsed_c_files[c_file]
else:
match_source_path_line = re.compile(r' */[*] +"(.*)":([0-9]+)$').match
match_current_code_line = re.compile(r' *[*] (.*) # <<<<<<+$').match
match_comment_end = re.compile(r' *[*]/$').match
not_executable = re.compile(
r'\s*c(?:type)?def\s+'
r'(?:(?:public|external)\s+)?'
r'(?:struct|union|enum|class)'
r'(\s+[^:]+|)\s*:'
).match
code_lines = defaultdict(dict)
filenames = set()
with open(c_file) as lines:
lines = iter(lines)
for line in lines:
match = match_source_path_line(line)
if not match:
continue
filename, lineno = match.groups()
filenames.add(filename)
lineno = int(lineno)
for comment_line in lines:
match = match_current_code_line(comment_line)
if match:
code_line = match.group(1).rstrip()
if not_executable(code_line):
break
code_lines[filename][lineno] = code_line
break
elif match_comment_end(comment_line):
# unexpected comment format - false positive?
break
self._parsed_c_files[c_file] = code_lines
if self._c_files_map is None:
self._c_files_map = {}
for filename, code in code_lines.items():
abs_path = _find_dep_file_path(c_file, filename)
self._c_files_map[abs_path] = (c_file, filename, code)
if sourcefile not in self._c_files_map:
return (None,) * 2 # e.g. shared library file
return self._c_files_map[sourcefile][1:]
class CythonModuleTracer(FileTracer):
"""
Find the Python/Cython source file for a Cython module.
"""
def __init__(self, module_file, py_file, c_file, c_files_map, file_path_map):
super(CythonModuleTracer, self).__init__()
self.module_file = module_file
self.py_file = py_file
self.c_file = c_file
self._c_files_map = c_files_map
self._file_path_map = file_path_map
def has_dynamic_source_filename(self):
return True
def dynamic_source_filename(self, filename, frame):
"""
Determine source file path. Called by the function call tracer.
"""
source_file = frame.f_code.co_filename
try:
return self._file_path_map[source_file]
except KeyError:
pass
abs_path = _find_dep_file_path(filename, source_file)
if self.py_file and source_file[-3:].lower() == '.py':
# always let coverage.py handle this case itself
self._file_path_map[source_file] = self.py_file
return self.py_file
assert self._c_files_map is not None
if abs_path not in self._c_files_map:
self._c_files_map[abs_path] = (self.c_file, source_file, None)
self._file_path_map[source_file] = abs_path
return abs_path
class CythonModuleReporter(FileReporter):
"""
Provide detailed trace information for one source file to coverage.py.
"""
def __init__(self, c_file, source_file, rel_file_path, code):
super(CythonModuleReporter, self).__init__(source_file)
self.name = rel_file_path
self.c_file = c_file
self._code = code
def lines(self):
"""
Return set of line numbers that are possibly executable.
"""
return set(self._code)
def _iter_source_tokens(self):
current_line = 1
for line_no, code_line in sorted(self._code.items()):
while line_no > current_line:
yield []
current_line += 1
yield [('txt', code_line)]
current_line += 1
def source(self):
"""
Return the source code of the file as a string.
"""
if os.path.exists(self.filename):
with open_source_file(self.filename) as f:
return f.read()
else:
return '\n'.join(
(tokens[0][1] if tokens else '')
for tokens in self._iter_source_tokens())
def source_token_lines(self):
"""
Iterate over the source code tokens.
"""
if os.path.exists(self.filename):
with open_source_file(self.filename) as f:
for line in f:
yield [('txt', line.rstrip('\n'))]
else:
for line in self._iter_source_tokens():
yield [('txt', line)]
def coverage_init(reg, options):
reg.add_file_tracer(Plugin())
|