symbian-qemu-0.9.1-12/python-win32-2.6.1/lib/cProfile.py
author martin.trojer@nokia.com
Fri, 31 Jul 2009 15:01:17 +0100
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#! /usr/bin/env python
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"""Python interface for the 'lsprof' profiler.
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   Compatible with the 'profile' module.
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"""
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__all__ = ["run", "runctx", "help", "Profile"]
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import _lsprof
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# ____________________________________________________________
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# Simple interface
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def run(statement, filename=None, sort=-1):
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    """Run statement under profiler optionally saving results in filename
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    This function takes a single argument that can be passed to the
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    "exec" statement, and an optional file name.  In all cases this
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    routine attempts to "exec" its first argument and gather profiling
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    statistics from the execution. If no file name is present, then this
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    function automatically prints a simple profiling report, sorted by the
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    standard name string (file/line/function-name) that is presented in
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    each line.
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    """
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    prof = Profile()
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    result = None
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    try:
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        try:
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            prof = prof.run(statement)
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        except SystemExit:
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            pass
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    finally:
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        if filename is not None:
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            prof.dump_stats(filename)
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        else:
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            result = prof.print_stats(sort)
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    return result
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def runctx(statement, globals, locals, filename=None):
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    """Run statement under profiler, supplying your own globals and locals,
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    optionally saving results in filename.
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    statement and filename have the same semantics as profile.run
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    """
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    prof = Profile()
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    result = None
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    try:
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        try:
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            prof = prof.runctx(statement, globals, locals)
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        except SystemExit:
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            pass
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    finally:
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        if filename is not None:
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            prof.dump_stats(filename)
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        else:
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            result = prof.print_stats()
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    return result
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# Backwards compatibility.
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def help():
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    print "Documentation for the profile/cProfile modules can be found "
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    print "in the Python Library Reference, section 'The Python Profiler'."
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# ____________________________________________________________
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class Profile(_lsprof.Profiler):
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    """Profile(custom_timer=None, time_unit=None, subcalls=True, builtins=True)
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    Builds a profiler object using the specified timer function.
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    The default timer is a fast built-in one based on real time.
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    For custom timer functions returning integers, time_unit can
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    be a float specifying a scale (i.e. how long each integer unit
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    is, in seconds).
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    """
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    # Most of the functionality is in the base class.
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    # This subclass only adds convenient and backward-compatible methods.
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    def print_stats(self, sort=-1):
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        import pstats
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        pstats.Stats(self).strip_dirs().sort_stats(sort).print_stats()
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    def dump_stats(self, file):
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        import marshal
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        f = open(file, 'wb')
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        self.create_stats()
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        marshal.dump(self.stats, f)
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        f.close()
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    def create_stats(self):
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        self.disable()
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        self.snapshot_stats()
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    def snapshot_stats(self):
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        entries = self.getstats()
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        self.stats = {}
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        callersdicts = {}
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        # call information
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        for entry in entries:
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            func = label(entry.code)
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            nc = entry.callcount         # ncalls column of pstats (before '/')
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            cc = nc - entry.reccallcount # ncalls column of pstats (after '/')
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            tt = entry.inlinetime        # tottime column of pstats
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            ct = entry.totaltime         # cumtime column of pstats
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            callers = {}
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            callersdicts[id(entry.code)] = callers
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            self.stats[func] = cc, nc, tt, ct, callers
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        # subcall information
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        for entry in entries:
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            if entry.calls:
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                func = label(entry.code)
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                for subentry in entry.calls:
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                    try:
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                        callers = callersdicts[id(subentry.code)]
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                    except KeyError:
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                        continue
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                    nc = subentry.callcount
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                    cc = nc - subentry.reccallcount
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                    tt = subentry.inlinetime
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                    ct = subentry.totaltime
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                    if func in callers:
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                        prev = callers[func]
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                        nc += prev[0]
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                        cc += prev[1]
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                        tt += prev[2]
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                        ct += prev[3]
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                    callers[func] = nc, cc, tt, ct
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    # The following two methods can be called by clients to use
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    # a profiler to profile a statement, given as a string.
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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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        return self.runctx(cmd, dict, dict)
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    def runctx(self, cmd, globals, locals):
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        self.enable()
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        try:
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            exec cmd in globals, locals
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        finally:
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            self.disable()
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        return self
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    # This method is more useful to profile a single function call.
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    def runcall(self, func, *args, **kw):
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        self.enable()
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        try:
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            return func(*args, **kw)
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        finally:
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            self.disable()
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# ____________________________________________________________
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def label(code):
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    if isinstance(code, str):
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        return ('~', 0, code)    # built-in functions ('~' sorts at the end)
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    else:
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        return (code.co_filename, code.co_firstlineno, code.co_name)
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2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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# ____________________________________________________________
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def main():
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    import os, sys
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    from optparse import OptionParser
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    usage = "cProfile.py [-o output_file_path] [-s sort] scriptfile [arg] ..."
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    parser = OptionParser(usage=usage)
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    parser.allow_interspersed_args = False
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    parser.add_option('-o', '--outfile', dest="outfile",
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        help="Save stats to <outfile>", default=None)
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    parser.add_option('-s', '--sort', dest="sort",
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        help="Sort order when printing to stdout, based on pstats.Stats class", default=-1)
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    if not sys.argv[1:]:
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        parser.print_usage()
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        sys.exit(2)
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    (options, args) = parser.parse_args()
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    sys.argv[:] = args
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   181
    if (len(sys.argv) > 0):
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        sys.path.insert(0, os.path.dirname(sys.argv[0]))
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        run('execfile(%r)' % (sys.argv[0],), options.outfile, options.sort)
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   184
    else:
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   185
        parser.print_usage()
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   186
    return parser
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   187
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# When invoked as main program, invoke the profiler on a script
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   189
if __name__ == '__main__':
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    main()