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731 lines
28 KiB
Python
Executable File
731 lines
28 KiB
Python
Executable File
#!/usr/bin/env python3
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# portions copyright 2001, Autonomous Zones Industries, Inc., all rights...
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# err... reserved and offered to the public under the terms of the
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# Python 2.2 license.
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# Author: Zooko O'Whielacronx
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# http://zooko.com/
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# mailto:zooko@zooko.com
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#
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# Copyright 2000, Mojam Media, Inc., all rights reserved.
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# Author: Skip Montanaro
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#
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# Copyright 1999, Bioreason, Inc., all rights reserved.
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# Author: Andrew Dalke
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#
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# Copyright 1995-1997, Automatrix, Inc., all rights reserved.
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# Author: Skip Montanaro
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#
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# Copyright 1991-1995, Stichting Mathematisch Centrum, all rights reserved.
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#
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#
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# Permission to use, copy, modify, and distribute this Python software and
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# its associated documentation for any purpose without fee is hereby
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# granted, provided that the above copyright notice appears in all copies,
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# and that both that copyright notice and this permission notice appear in
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# supporting documentation, and that the name of neither Automatrix,
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# Bioreason or Mojam Media be used in advertising or publicity pertaining to
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# distribution of the software without specific, written prior permission.
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#
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"""program/module to trace Python program or function execution
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Sample use, command line:
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trace.py -c -f counts --ignore-dir '$prefix' spam.py eggs
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trace.py -t --ignore-dir '$prefix' spam.py eggs
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trace.py --trackcalls spam.py eggs
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Sample use, programmatically
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import sys
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# create a Trace object, telling it what to ignore, and whether to
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# do tracing or line-counting or both.
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tracer = trace.Trace(ignoredirs=[sys.base_prefix, sys.base_exec_prefix,],
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trace=0, count=1)
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# run the new command using the given tracer
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tracer.run('main()')
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# make a report, placing output in /tmp
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r = tracer.results()
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r.write_results(show_missing=True, coverdir="/tmp")
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"""
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__all__ = ['Trace', 'CoverageResults']
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import linecache
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import os
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import re
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import sys
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import token
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import tokenize
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import inspect
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import gc
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import dis
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import pickle
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from time import monotonic as _time
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import threading
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def _settrace(func):
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threading.settrace(func)
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sys.settrace(func)
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def _unsettrace():
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sys.settrace(None)
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threading.settrace(None)
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PRAGMA_NOCOVER = "#pragma NO COVER"
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class _Ignore:
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def __init__(self, modules=None, dirs=None):
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self._mods = set() if not modules else set(modules)
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self._dirs = [] if not dirs else [os.path.normpath(d)
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for d in dirs]
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self._ignore = { '<string>': 1 }
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def names(self, filename, modulename):
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if modulename in self._ignore:
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return self._ignore[modulename]
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# haven't seen this one before, so see if the module name is
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# on the ignore list.
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if modulename in self._mods: # Identical names, so ignore
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self._ignore[modulename] = 1
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return 1
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# check if the module is a proper submodule of something on
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# the ignore list
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for mod in self._mods:
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# Need to take some care since ignoring
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# "cmp" mustn't mean ignoring "cmpcache" but ignoring
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# "Spam" must also mean ignoring "Spam.Eggs".
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if modulename.startswith(mod + '.'):
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self._ignore[modulename] = 1
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return 1
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# Now check that filename isn't in one of the directories
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if filename is None:
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# must be a built-in, so we must ignore
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self._ignore[modulename] = 1
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return 1
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# Ignore a file when it contains one of the ignorable paths
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for d in self._dirs:
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# The '+ os.sep' is to ensure that d is a parent directory,
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# as compared to cases like:
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# d = "/usr/local"
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# filename = "/usr/local.py"
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# or
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# d = "/usr/local.py"
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# filename = "/usr/local.py"
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if filename.startswith(d + os.sep):
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self._ignore[modulename] = 1
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return 1
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# Tried the different ways, so we don't ignore this module
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self._ignore[modulename] = 0
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return 0
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def _modname(path):
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"""Return a plausible module name for the patch."""
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base = os.path.basename(path)
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filename, ext = os.path.splitext(base)
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return filename
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def _fullmodname(path):
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"""Return a plausible module name for the path."""
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# If the file 'path' is part of a package, then the filename isn't
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# enough to uniquely identify it. Try to do the right thing by
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# looking in sys.path for the longest matching prefix. We'll
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# assume that the rest is the package name.
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comparepath = os.path.normcase(path)
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longest = ""
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for dir in sys.path:
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dir = os.path.normcase(dir)
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if comparepath.startswith(dir) and comparepath[len(dir)] == os.sep:
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if len(dir) > len(longest):
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longest = dir
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if longest:
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base = path[len(longest) + 1:]
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else:
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base = path
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# the drive letter is never part of the module name
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drive, base = os.path.splitdrive(base)
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base = base.replace(os.sep, ".")
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if os.altsep:
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base = base.replace(os.altsep, ".")
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filename, ext = os.path.splitext(base)
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return filename.lstrip(".")
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class CoverageResults:
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def __init__(self, counts=None, calledfuncs=None, infile=None,
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callers=None, outfile=None):
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self.counts = counts
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if self.counts is None:
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self.counts = {}
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self.counter = self.counts.copy() # map (filename, lineno) to count
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self.calledfuncs = calledfuncs
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if self.calledfuncs is None:
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self.calledfuncs = {}
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self.calledfuncs = self.calledfuncs.copy()
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self.callers = callers
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if self.callers is None:
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self.callers = {}
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self.callers = self.callers.copy()
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self.infile = infile
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self.outfile = outfile
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if self.infile:
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# Try to merge existing counts file.
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try:
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with open(self.infile, 'rb') as f:
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counts, calledfuncs, callers = pickle.load(f)
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self.update(self.__class__(counts, calledfuncs, callers))
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except (OSError, EOFError, ValueError) as err:
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print(("Skipping counts file %r: %s"
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% (self.infile, err)), file=sys.stderr)
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def is_ignored_filename(self, filename):
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"""Return True if the filename does not refer to a file
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we want to have reported.
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"""
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return filename.startswith('<') and filename.endswith('>')
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def update(self, other):
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"""Merge in the data from another CoverageResults"""
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counts = self.counts
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calledfuncs = self.calledfuncs
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callers = self.callers
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other_counts = other.counts
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other_calledfuncs = other.calledfuncs
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other_callers = other.callers
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for key in other_counts:
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counts[key] = counts.get(key, 0) + other_counts[key]
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for key in other_calledfuncs:
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calledfuncs[key] = 1
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for key in other_callers:
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callers[key] = 1
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def write_results(self, show_missing=True, summary=False, coverdir=None):
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"""
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Write the coverage results.
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:param show_missing: Show lines that had no hits.
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:param summary: Include coverage summary per module.
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:param coverdir: If None, the results of each module are placed in its
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directory, otherwise it is included in the directory
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specified.
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"""
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if self.calledfuncs:
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print()
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print("functions called:")
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calls = self.calledfuncs
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for filename, modulename, funcname in sorted(calls):
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print(("filename: %s, modulename: %s, funcname: %s"
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% (filename, modulename, funcname)))
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if self.callers:
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print()
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print("calling relationships:")
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lastfile = lastcfile = ""
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for ((pfile, pmod, pfunc), (cfile, cmod, cfunc)) \
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in sorted(self.callers):
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if pfile != lastfile:
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print()
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print("***", pfile, "***")
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lastfile = pfile
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lastcfile = ""
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if cfile != pfile and lastcfile != cfile:
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print(" -->", cfile)
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lastcfile = cfile
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print(" %s.%s -> %s.%s" % (pmod, pfunc, cmod, cfunc))
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# turn the counts data ("(filename, lineno) = count") into something
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# accessible on a per-file basis
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per_file = {}
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for filename, lineno in self.counts:
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lines_hit = per_file[filename] = per_file.get(filename, {})
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lines_hit[lineno] = self.counts[(filename, lineno)]
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# accumulate summary info, if needed
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sums = {}
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for filename, count in per_file.items():
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if self.is_ignored_filename(filename):
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continue
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if filename.endswith(".pyc"):
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filename = filename[:-1]
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if coverdir is None:
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dir = os.path.dirname(os.path.abspath(filename))
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modulename = _modname(filename)
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else:
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dir = coverdir
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if not os.path.exists(dir):
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os.makedirs(dir)
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modulename = _fullmodname(filename)
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# If desired, get a list of the line numbers which represent
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# executable content (returned as a dict for better lookup speed)
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if show_missing:
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lnotab = _find_executable_linenos(filename)
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else:
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lnotab = {}
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source = linecache.getlines(filename)
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coverpath = os.path.join(dir, modulename + ".cover")
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with open(filename, 'rb') as fp:
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encoding, _ = tokenize.detect_encoding(fp.readline)
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n_hits, n_lines = self.write_results_file(coverpath, source,
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lnotab, count, encoding)
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if summary and n_lines:
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percent = int(100 * n_hits / n_lines)
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sums[modulename] = n_lines, percent, modulename, filename
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if summary and sums:
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print("lines cov% module (path)")
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for m in sorted(sums):
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n_lines, percent, modulename, filename = sums[m]
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print("%5d %3d%% %s (%s)" % sums[m])
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if self.outfile:
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# try and store counts and module info into self.outfile
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try:
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pickle.dump((self.counts, self.calledfuncs, self.callers),
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open(self.outfile, 'wb'), 1)
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except OSError as err:
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print("Can't save counts files because %s" % err, file=sys.stderr)
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def write_results_file(self, path, lines, lnotab, lines_hit, encoding=None):
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"""Return a coverage results file in path."""
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# ``lnotab`` is a dict of executable lines, or a line number "table"
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try:
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outfile = open(path, "w", encoding=encoding)
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except OSError as err:
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print(("trace: Could not open %r for writing: %s"
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"- skipping" % (path, err)), file=sys.stderr)
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return 0, 0
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n_lines = 0
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n_hits = 0
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with outfile:
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for lineno, line in enumerate(lines, 1):
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# do the blank/comment match to try to mark more lines
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# (help the reader find stuff that hasn't been covered)
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if lineno in lines_hit:
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outfile.write("%5d: " % lines_hit[lineno])
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n_hits += 1
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n_lines += 1
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elif lineno in lnotab and not PRAGMA_NOCOVER in line:
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# Highlight never-executed lines, unless the line contains
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# #pragma: NO COVER
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outfile.write(">>>>>> ")
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n_lines += 1
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else:
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outfile.write(" ")
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outfile.write(line.expandtabs(8))
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return n_hits, n_lines
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def _find_lines_from_code(code, strs):
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"""Return dict where keys are lines in the line number table."""
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linenos = {}
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for _, lineno in dis.findlinestarts(code):
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if lineno not in strs:
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linenos[lineno] = 1
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return linenos
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def _find_lines(code, strs):
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"""Return lineno dict for all code objects reachable from code."""
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# get all of the lineno information from the code of this scope level
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linenos = _find_lines_from_code(code, strs)
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# and check the constants for references to other code objects
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for c in code.co_consts:
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if inspect.iscode(c):
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# find another code object, so recurse into it
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linenos.update(_find_lines(c, strs))
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return linenos
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def _find_strings(filename, encoding=None):
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"""Return a dict of possible docstring positions.
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The dict maps line numbers to strings. There is an entry for
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line that contains only a string or a part of a triple-quoted
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string.
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"""
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d = {}
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# If the first token is a string, then it's the module docstring.
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# Add this special case so that the test in the loop passes.
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prev_ttype = token.INDENT
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with open(filename, encoding=encoding) as f:
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tok = tokenize.generate_tokens(f.readline)
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for ttype, tstr, start, end, line in tok:
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if ttype == token.STRING:
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if prev_ttype == token.INDENT:
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sline, scol = start
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eline, ecol = end
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for i in range(sline, eline + 1):
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d[i] = 1
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prev_ttype = ttype
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return d
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def _find_executable_linenos(filename):
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"""Return dict where keys are line numbers in the line number table."""
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try:
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with tokenize.open(filename) as f:
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prog = f.read()
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encoding = f.encoding
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except OSError as err:
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print(("Not printing coverage data for %r: %s"
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% (filename, err)), file=sys.stderr)
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return {}
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code = compile(prog, filename, "exec")
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strs = _find_strings(filename, encoding)
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return _find_lines(code, strs)
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class Trace:
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def __init__(self, count=1, trace=1, countfuncs=0, countcallers=0,
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ignoremods=(), ignoredirs=(), infile=None, outfile=None,
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timing=False):
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"""
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@param count true iff it should count number of times each
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line is executed
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@param trace true iff it should print out each line that is
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being counted
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@param countfuncs true iff it should just output a list of
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(filename, modulename, funcname,) for functions
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that were called at least once; This overrides
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`count' and `trace'
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@param ignoremods a list of the names of modules to ignore
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@param ignoredirs a list of the names of directories to ignore
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all of the (recursive) contents of
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@param infile file from which to read stored counts to be
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added into the results
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@param outfile file in which to write the results
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@param timing true iff timing information be displayed
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"""
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self.infile = infile
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self.outfile = outfile
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self.ignore = _Ignore(ignoremods, ignoredirs)
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self.counts = {} # keys are (filename, linenumber)
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self.pathtobasename = {} # for memoizing os.path.basename
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self.donothing = 0
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self.trace = trace
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self._calledfuncs = {}
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self._callers = {}
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self._caller_cache = {}
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self.start_time = None
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if timing:
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self.start_time = _time()
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if countcallers:
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self.globaltrace = self.globaltrace_trackcallers
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elif countfuncs:
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self.globaltrace = self.globaltrace_countfuncs
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elif trace and count:
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self.globaltrace = self.globaltrace_lt
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self.localtrace = self.localtrace_trace_and_count
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elif trace:
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self.globaltrace = self.globaltrace_lt
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self.localtrace = self.localtrace_trace
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elif count:
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self.globaltrace = self.globaltrace_lt
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self.localtrace = self.localtrace_count
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else:
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# Ahem -- do nothing? Okay.
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self.donothing = 1
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def run(self, cmd):
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import __main__
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dict = __main__.__dict__
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self.runctx(cmd, dict, dict)
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def runctx(self, cmd, globals=None, locals=None):
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if globals is None: globals = {}
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if locals is None: locals = {}
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if not self.donothing:
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_settrace(self.globaltrace)
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try:
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exec(cmd, globals, locals)
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finally:
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if not self.donothing:
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_unsettrace()
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def runfunc(self, func, *args, **kw):
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result = None
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if not self.donothing:
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sys.settrace(self.globaltrace)
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try:
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result = func(*args, **kw)
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finally:
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if not self.donothing:
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sys.settrace(None)
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return result
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def file_module_function_of(self, frame):
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code = frame.f_code
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filename = code.co_filename
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if filename:
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modulename = _modname(filename)
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else:
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modulename = None
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funcname = code.co_name
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clsname = None
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if code in self._caller_cache:
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if self._caller_cache[code] is not None:
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clsname = self._caller_cache[code]
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else:
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self._caller_cache[code] = None
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## use of gc.get_referrers() was suggested by Michael Hudson
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# all functions which refer to this code object
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funcs = [f for f in gc.get_referrers(code)
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if inspect.isfunction(f)]
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# require len(func) == 1 to avoid ambiguity caused by calls to
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# new.function(): "In the face of ambiguity, refuse the
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# temptation to guess."
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if len(funcs) == 1:
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dicts = [d for d in gc.get_referrers(funcs[0])
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if isinstance(d, dict)]
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if len(dicts) == 1:
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classes = [c for c in gc.get_referrers(dicts[0])
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if hasattr(c, "__bases__")]
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if len(classes) == 1:
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# ditto for new.classobj()
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clsname = classes[0].__name__
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# cache the result - assumption is that new.* is
|
|
# not called later to disturb this relationship
|
|
# _caller_cache could be flushed if functions in
|
|
# the new module get called.
|
|
self._caller_cache[code] = clsname
|
|
if clsname is not None:
|
|
funcname = "%s.%s" % (clsname, funcname)
|
|
|
|
return filename, modulename, funcname
|
|
|
|
def globaltrace_trackcallers(self, frame, why, arg):
|
|
"""Handler for call events.
|
|
|
|
Adds information about who called who to the self._callers dict.
|
|
"""
|
|
if why == 'call':
|
|
# XXX Should do a better job of identifying methods
|
|
this_func = self.file_module_function_of(frame)
|
|
parent_func = self.file_module_function_of(frame.f_back)
|
|
self._callers[(parent_func, this_func)] = 1
|
|
|
|
def globaltrace_countfuncs(self, frame, why, arg):
|
|
"""Handler for call events.
|
|
|
|
Adds (filename, modulename, funcname) to the self._calledfuncs dict.
|
|
"""
|
|
if why == 'call':
|
|
this_func = self.file_module_function_of(frame)
|
|
self._calledfuncs[this_func] = 1
|
|
|
|
def globaltrace_lt(self, frame, why, arg):
|
|
"""Handler for call events.
|
|
|
|
If the code block being entered is to be ignored, returns `None',
|
|
else returns self.localtrace.
|
|
"""
|
|
if why == 'call':
|
|
code = frame.f_code
|
|
filename = frame.f_globals.get('__file__', None)
|
|
if filename:
|
|
# XXX _modname() doesn't work right for packages, so
|
|
# the ignore support won't work right for packages
|
|
modulename = _modname(filename)
|
|
if modulename is not None:
|
|
ignore_it = self.ignore.names(filename, modulename)
|
|
if not ignore_it:
|
|
if self.trace:
|
|
print((" --- modulename: %s, funcname: %s"
|
|
% (modulename, code.co_name)))
|
|
return self.localtrace
|
|
else:
|
|
return None
|
|
|
|
def localtrace_trace_and_count(self, frame, why, arg):
|
|
if why == "line":
|
|
# record the file name and line number of every trace
|
|
filename = frame.f_code.co_filename
|
|
lineno = frame.f_lineno
|
|
key = filename, lineno
|
|
self.counts[key] = self.counts.get(key, 0) + 1
|
|
|
|
if self.start_time:
|
|
print('%.2f' % (_time() - self.start_time), end=' ')
|
|
bname = os.path.basename(filename)
|
|
print("%s(%d): %s" % (bname, lineno,
|
|
linecache.getline(filename, lineno)), end='')
|
|
return self.localtrace
|
|
|
|
def localtrace_trace(self, frame, why, arg):
|
|
if why == "line":
|
|
# record the file name and line number of every trace
|
|
filename = frame.f_code.co_filename
|
|
lineno = frame.f_lineno
|
|
|
|
if self.start_time:
|
|
print('%.2f' % (_time() - self.start_time), end=' ')
|
|
bname = os.path.basename(filename)
|
|
print("%s(%d): %s" % (bname, lineno,
|
|
linecache.getline(filename, lineno)), end='')
|
|
return self.localtrace
|
|
|
|
def localtrace_count(self, frame, why, arg):
|
|
if why == "line":
|
|
filename = frame.f_code.co_filename
|
|
lineno = frame.f_lineno
|
|
key = filename, lineno
|
|
self.counts[key] = self.counts.get(key, 0) + 1
|
|
return self.localtrace
|
|
|
|
def results(self):
|
|
return CoverageResults(self.counts, infile=self.infile,
|
|
outfile=self.outfile,
|
|
calledfuncs=self._calledfuncs,
|
|
callers=self._callers)
|
|
|
|
def main():
|
|
import argparse
|
|
|
|
parser = argparse.ArgumentParser()
|
|
parser.add_argument('--version', action='version', version='trace 2.0')
|
|
|
|
grp = parser.add_argument_group('Main options',
|
|
'One of these (or --report) must be given')
|
|
|
|
grp.add_argument('-c', '--count', action='store_true',
|
|
help='Count the number of times each line is executed and write '
|
|
'the counts to <module>.cover for each module executed, in '
|
|
'the module\'s directory. See also --coverdir, --file, '
|
|
'--no-report below.')
|
|
grp.add_argument('-t', '--trace', action='store_true',
|
|
help='Print each line to sys.stdout before it is executed')
|
|
grp.add_argument('-l', '--listfuncs', action='store_true',
|
|
help='Keep track of which functions are executed at least once '
|
|
'and write the results to sys.stdout after the program exits. '
|
|
'Cannot be specified alongside --trace or --count.')
|
|
grp.add_argument('-T', '--trackcalls', action='store_true',
|
|
help='Keep track of caller/called pairs and write the results to '
|
|
'sys.stdout after the program exits.')
|
|
|
|
grp = parser.add_argument_group('Modifiers')
|
|
|
|
_grp = grp.add_mutually_exclusive_group()
|
|
_grp.add_argument('-r', '--report', action='store_true',
|
|
help='Generate a report from a counts file; does not execute any '
|
|
'code. --file must specify the results file to read, which '
|
|
'must have been created in a previous run with --count '
|
|
'--file=FILE')
|
|
_grp.add_argument('-R', '--no-report', action='store_true',
|
|
help='Do not generate the coverage report files. '
|
|
'Useful if you want to accumulate over several runs.')
|
|
|
|
grp.add_argument('-f', '--file',
|
|
help='File to accumulate counts over several runs')
|
|
grp.add_argument('-C', '--coverdir',
|
|
help='Directory where the report files go. The coverage report '
|
|
'for <package>.<module> will be written to file '
|
|
'<dir>/<package>/<module>.cover')
|
|
grp.add_argument('-m', '--missing', action='store_true',
|
|
help='Annotate executable lines that were not executed with '
|
|
'">>>>>> "')
|
|
grp.add_argument('-s', '--summary', action='store_true',
|
|
help='Write a brief summary for each file to sys.stdout. '
|
|
'Can only be used with --count or --report')
|
|
grp.add_argument('-g', '--timing', action='store_true',
|
|
help='Prefix each line with the time since the program started. '
|
|
'Only used while tracing')
|
|
|
|
grp = parser.add_argument_group('Filters',
|
|
'Can be specified multiple times')
|
|
grp.add_argument('--ignore-module', action='append', default=[],
|
|
help='Ignore the given module(s) and its submodules'
|
|
'(if it is a package). Accepts comma separated list of '
|
|
'module names.')
|
|
grp.add_argument('--ignore-dir', action='append', default=[],
|
|
help='Ignore files in the given directory '
|
|
'(multiple directories can be joined by os.pathsep).')
|
|
|
|
parser.add_argument('filename', nargs='?',
|
|
help='file to run as main program')
|
|
parser.add_argument('arguments', nargs=argparse.REMAINDER,
|
|
help='arguments to the program')
|
|
|
|
opts = parser.parse_args()
|
|
|
|
if opts.ignore_dir:
|
|
rel_path = 'lib', 'python{0.major}.{0.minor}'.format(sys.version_info)
|
|
_prefix = os.path.join(sys.base_prefix, *rel_path)
|
|
_exec_prefix = os.path.join(sys.base_exec_prefix, *rel_path)
|
|
|
|
def parse_ignore_dir(s):
|
|
s = os.path.expanduser(os.path.expandvars(s))
|
|
s = s.replace('$prefix', _prefix).replace('$exec_prefix', _exec_prefix)
|
|
return os.path.normpath(s)
|
|
|
|
opts.ignore_module = [mod.strip()
|
|
for i in opts.ignore_module for mod in i.split(',')]
|
|
opts.ignore_dir = [parse_ignore_dir(s)
|
|
for i in opts.ignore_dir for s in i.split(os.pathsep)]
|
|
|
|
if opts.report:
|
|
if not opts.file:
|
|
parser.error('-r/--report requires -f/--file')
|
|
results = CoverageResults(infile=opts.file, outfile=opts.file)
|
|
return results.write_results(opts.missing, opts.summary, opts.coverdir)
|
|
|
|
if not any([opts.trace, opts.count, opts.listfuncs, opts.trackcalls]):
|
|
parser.error('must specify one of --trace, --count, --report, '
|
|
'--listfuncs, or --trackcalls')
|
|
|
|
if opts.listfuncs and (opts.count or opts.trace):
|
|
parser.error('cannot specify both --listfuncs and (--trace or --count)')
|
|
|
|
if opts.summary and not opts.count:
|
|
parser.error('--summary can only be used with --count or --report')
|
|
|
|
if opts.filename is None:
|
|
parser.error('filename is missing: required with the main options')
|
|
|
|
sys.argv = [opts.filename, *opts.arguments]
|
|
sys.path[0] = os.path.dirname(opts.filename)
|
|
|
|
t = Trace(opts.count, opts.trace, countfuncs=opts.listfuncs,
|
|
countcallers=opts.trackcalls, ignoremods=opts.ignore_module,
|
|
ignoredirs=opts.ignore_dir, infile=opts.file,
|
|
outfile=opts.file, timing=opts.timing)
|
|
try:
|
|
with open(opts.filename) as fp:
|
|
code = compile(fp.read(), opts.filename, 'exec')
|
|
# try to emulate __main__ namespace as much as possible
|
|
globs = {
|
|
'__file__': opts.filename,
|
|
'__name__': '__main__',
|
|
'__package__': None,
|
|
'__cached__': None,
|
|
}
|
|
t.runctx(code, globs, globs)
|
|
except OSError as err:
|
|
sys.exit("Cannot run file %r because: %s" % (sys.argv[0], err))
|
|
except SystemExit:
|
|
pass
|
|
|
|
results = t.results()
|
|
|
|
if not opts.no_report:
|
|
results.write_results(opts.missing, opts.summary, opts.coverdir)
|
|
|
|
if __name__=='__main__':
|
|
main()
|