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Added --trackcalls command line arg to display crude caller/callee
relationships at program exit. Output is a bit prettier than that for --listfuncs but won't parse as easily using downstream postprocessing tools.
This commit is contained in:
Skip Montanaro
parent
7eddd78a15
commit
cafc811415
106
Lib/trace.py
106
Lib/trace.py
@ -32,6 +32,7 @@
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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 --track-callers spam.py eggs
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Sample use, programmatically
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# create a Trace object, telling it what to ignore, and whether to
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@ -76,6 +77,8 @@ Otherwise, exactly one of the following three options must be given:
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-l, --listfuncs Keep track of which functions are executed at least
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once and write the results to sys.stdout after the
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program exits.
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-T, --trackcalls Keep track of caller/called pairs and write the
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results to sys.stdout after the program exits.
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-r, --report Generate a report from a counts file; do not execute
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any code. `--file' must specify the results file to
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read, which must have been created in a previous run
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@ -191,7 +194,7 @@ def fullmodname(path):
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class CoverageResults:
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def __init__(self, counts=None, calledfuncs=None, infile=None,
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outfile=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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@ -200,13 +203,18 @@ class CoverageResults:
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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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counts, calledfuncs = pickle.load(open(self.infile, 'rb'))
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self.update(self.__class__(counts, calledfuncs))
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counts, calledfuncs, callers = \
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pickle.load(open(self.infile, 'rb'))
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self.update(self.__class__(counts, calledfuncs, callers))
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except (IOError, EOFError, ValueError), err:
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print >> sys.stderr, ("Skipping counts file %r: %s"
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% (self.infile, err))
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@ -215,8 +223,10 @@ class CoverageResults:
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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.keys():
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counts[key] = counts.get(key, 0) + other_counts[key]
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@ -224,13 +234,35 @@ class CoverageResults:
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for key in other_calledfuncs.keys():
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calledfuncs[key] = 1
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for key in other_callers.keys():
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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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@param coverdir
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"""
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for filename, modulename, funcname in self.calledfuncs.keys():
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print ("filename: %s, modulename: %s, funcname: %s"
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% (filename, modulename, funcname))
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if self.calledfuncs:
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print "functions called:"
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calls = self.calledfuncs.keys()
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calls.sort()
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for filename, modulename, funcname in 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 "calling relationships:"
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calls = self.callers.keys()
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calls.sort()
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lastfile = lastcfile = ""
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for ((pfile, pmod, pfunc), (cfile, cmod, cfunc)) in calls:
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if pfile != lastfile:
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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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@ -286,7 +318,7 @@ class CoverageResults:
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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),
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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 IOError, err:
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print >> sys.stderr, "Can't save counts files because %s" % err
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@ -392,8 +424,8 @@ def find_executable_linenos(filename):
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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, ignoremods=(),
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ignoredirs=(), infile=None, outfile=None):
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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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"""
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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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@ -419,7 +451,10 @@ class Trace:
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self.donothing = 0
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self.trace = trace
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self._calledfuncs = {}
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if countfuncs:
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self._callers = {}
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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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@ -471,6 +506,33 @@ class Trace:
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sys.settrace(None)
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return result
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def globaltrace_trackcallers(self, frame, why, arg):
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"""Handler for call events.
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Adds information about who called who to the self._callers dict.
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"""
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if why == 'call':
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# XXX Should do a better job of identifying methods
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code = frame.f_code
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filename = code.co_filename
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funcname = code.co_name
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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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this_func = (filename, modulename, funcname)
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frame = frame.f_back
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code = frame.f_code
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filename = code.co_filename
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funcname = code.co_name
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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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parent_func = (filename, modulename, funcname)
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self._callers[(parent_func, this_func)] = 1
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def globaltrace_countfuncs(self, frame, why, arg):
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"""Handler for call events.
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@ -544,7 +606,8 @@ class Trace:
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def results(self):
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return CoverageResults(self.counts, infile=self.infile,
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outfile=self.outfile,
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calledfuncs=self._calledfuncs)
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calledfuncs=self._calledfuncs,
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callers=self._callers)
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def _err_exit(msg):
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sys.stderr.write("%s: %s\n" % (sys.argv[0], msg))
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@ -556,12 +619,13 @@ def main(argv=None):
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if argv is None:
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argv = sys.argv
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try:
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opts, prog_argv = getopt.getopt(argv[1:], "tcrRf:d:msC:l",
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opts, prog_argv = getopt.getopt(argv[1:], "tcrRf:d:msC:lT",
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["help", "version", "trace", "count",
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"report", "no-report", "summary",
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"file=", "missing",
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"ignore-module=", "ignore-dir=",
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"coverdir=", "listfuncs",])
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"coverdir=", "listfuncs",
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"trackcalls"])
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except getopt.error, msg:
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sys.stderr.write("%s: %s\n" % (sys.argv[0], msg))
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@ -580,6 +644,7 @@ def main(argv=None):
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coverdir = None
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summary = 0
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listfuncs = False
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countcallers = False
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for opt, val in opts:
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if opt == "--help":
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@ -590,6 +655,10 @@ def main(argv=None):
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sys.stdout.write("trace 2.0\n")
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sys.exit(0)
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if opt == "-T" or opt == "--trackcalls":
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countcallers = True
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continue
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if opt == "-l" or opt == "--listfuncs":
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listfuncs = True
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continue
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@ -650,9 +719,9 @@ def main(argv=None):
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if listfuncs and (count or trace):
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_err_exit("cannot specify both --listfuncs and (--trace or --count)")
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if not count and not trace and not report and not listfuncs:
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_err_exit("must specify one of --trace, --count, --report or "
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"--listfuncs")
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if not (count or trace or report or listfuncs or countcallers):
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_err_exit("must specify one of --trace, --count, --report, "
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"--listfuncs, or --trackcalls")
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if report and no_report:
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_err_exit("cannot specify both --report and --no-report")
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@ -673,8 +742,9 @@ def main(argv=None):
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sys.path[0] = os.path.split(progname)[0]
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t = Trace(count, trace, countfuncs=listfuncs,
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ignoremods=ignore_modules, ignoredirs=ignore_dirs,
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infile=counts_file, outfile=counts_file)
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countcallers=countcallers, ignoremods=ignore_modules,
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ignoredirs=ignore_dirs, infile=counts_file,
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outfile=counts_file)
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try:
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t.run('execfile(%r)' % (progname,))
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except IOError, err:
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