~bzr-pqm/bzr/bzr.dev

# this is copied from the lsprof distro because somehow

# it is not installed by distutils

# I made one modification to profile so that it returns a pair

# instead of just the Stats object

import cPickle

import os

import sys

import thread

import threading

from _lsprof import Profiler, profiler_entry

__all__ = ['profile', 'Stats']

_g_threadmap = {}

def _thread_profile(f, *args, **kwds):

    # we lose the first profile point for a new thread in order to trampoline

    # a new Profile object into place

    global _g_threadmap

    thr = thread.get_ident()

    _g_threadmap[thr] = p = Profiler()

    # this overrides our sys.setprofile hook:

    p.enable(subcalls=True, builtins=True)

def profile(f, *args, **kwds):

    """Run a function profile.

    Exceptions are not caught: If you need stats even when exceptions are to be

    raised, passing in a closure that will catch the exceptions and transform

    them appropriately for your driver function.

    :return: The functions return value and a stats object.

    """

    global _g_threadmap

    p = Profiler()

    p.enable(subcalls=True)

    threading.setprofile(_thread_profile)

    try:

        ret = f(*args, **kwds)

    finally:

        p.disable()

        for pp in _g_threadmap.values():

            pp.disable()

        threading.setprofile(None)

    threads = {}

    for tid, pp in _g_threadmap.items():

        threads[tid] = Stats(pp.getstats(), {})

    _g_threadmap = {}

    return ret, Stats(p.getstats(), threads)

class Stats(object):

    """XXX docstring"""

    def __init__(self, data, threads):

        self.data = data

        self.threads = threads

    def sort(self, crit="inlinetime"):

        """XXX docstring"""

        if crit not in profiler_entry.__dict__:

            raise ValueError, "Can't sort by %s" % crit

        self.data.sort(lambda b, a: cmp(getattr(a, crit),

                                        getattr(b, crit)))

        for e in self.data:

            if e.calls:

                e.calls.sort(lambda b, a: cmp(getattr(a, crit),

                                              getattr(b, crit)))

    def pprint(self, top=None, file=None):

        """XXX docstring"""

        if file is None:

            file = sys.stdout

        d = self.data

        if top is not None:

            d = d[:top]

        cols = "% 12s %12s %11.4f %11.4f   %s\n"

        hcols = "% 12s %12s %12s %12s %s\n"

        cols2 = "+%12s %12s %11.4f %11.4f +  %s\n"

        file.write(hcols % ("CallCount", "Recursive", "Total(ms)",

                            "Inline(ms)", "module:lineno(function)"))

        for e in d:

            file.write(cols % (e.callcount, e.reccallcount, e.totaltime,

                               e.inlinetime, label(e.code)))

            if e.calls:

                for se in e.calls:

                    file.write(cols % ("+%s" % se.callcount, se.reccallcount,

                                       se.totaltime, se.inlinetime,

                                       "+%s" % label(se.code)))

    def freeze(self):

        """Replace all references to code objects with string

        descriptions; this makes it possible to pickle the instance."""

        # this code is probably rather ickier than it needs to be!

        for i in range(len(self.data)):

            e = self.data[i]

            if not isinstance(e.code, str):

                self.data[i] = type(e)((label(e.code),) + e[1:])

            if e.calls:

                for j in range(len(e.calls)):

                    se = e.calls[j]

                    if not isinstance(se.code, str):

                        e.calls[j] = type(se)((label(se.code),) + se[1:])

        for s in self.threads.values():

            s.freeze()

    def calltree(self, file):

        """Output profiling data in calltree format (for KCacheGrind)."""

        _CallTreeFilter(self.data).output(file)

    def save(self, filename, format=None):

        """Save profiling data to a file.

        :param filename: the name of the output file

        :param format: 'txt' for a text representation;

            'callgrind' for calltree format;

            otherwise a pickled Python object. A format of None indicates

            that the format to use is to be found from the filename. If

            the name starts with callgrind.out, callgrind format is used

            otherwise the format is given by the filename extension.

        """

        if format is None:

            basename = os.path.basename(filename)

            if basename.startswith('callgrind.out'):

                format = "callgrind"

            else:

                ext = os.path.splitext(filename)[1]

                if len(ext) > 1:

                    format = ext[1:]

        outfile = open(filename, 'wb')

        try:

            if format == "callgrind":

                self.calltree(outfile)

            elif format == "txt":

                self.pprint(file=outfile)

            else:

                self.freeze()

                cPickle.dump(self, outfile, 2)

        finally:

            outfile.close()

class _CallTreeFilter(object):

    """Converter of a Stats object to input suitable for KCacheGrind.

    This code is taken from http://ddaa.net/blog/python/lsprof-calltree

    with the changes made by J.P. Calderone and Itamar applied. Note that

    isinstance(code, str) needs to be used at times to determine if the code

    object is actually an external code object (with a filename, etc.) or

    a Python built-in.

    """

    def __init__(self, data):

        self.data = data

        self.out_file = None

    def output(self, out_file):

        self.out_file = out_file

        out_file.write('events: Ticks\n')

        self._print_summary()

        for entry in self.data:

            self._entry(entry)

    def _print_summary(self):

        max_cost = 0

        for entry in self.data:

            totaltime = int(entry.totaltime * 1000)

            max_cost = max(max_cost, totaltime)

        self.out_file.write('summary: %d\n' % (max_cost,))

    def _entry(self, entry):

        out_file = self.out_file

        code = entry.code

        inlinetime = int(entry.inlinetime * 1000)

        #out_file.write('ob=%s\n' % (code.co_filename,))

        if isinstance(code, str):

            out_file.write('fi=~\n')

        else:

            out_file.write('fi=%s\n' % (code.co_filename,))

        out_file.write('fn=%s\n' % (label(code, True),))

        if isinstance(code, str):

            out_file.write('0  %s\n' % (inlinetime,))

        else:

            out_file.write('%d %d\n' % (code.co_firstlineno, inlinetime))

        # recursive calls are counted in entry.calls

        if entry.calls:

            calls = entry.calls

        else:

            calls = []

        if isinstance(code, str):

            lineno = 0

        else:

            lineno = code.co_firstlineno

        for subentry in calls:

            self._subentry(lineno, subentry)

        out_file.write('\n')

    def _subentry(self, lineno, subentry):

        out_file = self.out_file

        code = subentry.code

        totaltime = int(subentry.totaltime * 1000)

        #out_file.write('cob=%s\n' % (code.co_filename,))

        out_file.write('cfn=%s\n' % (label(code, True),))

        if isinstance(code, str):

            out_file.write('cfi=~\n')

            out_file.write('calls=%d 0\n' % (subentry.callcount,))

        else:

            out_file.write('cfi=%s\n' % (code.co_filename,))

            out_file.write('calls=%d %d\n' % (

                subentry.callcount, code.co_firstlineno))

        out_file.write('%d %d\n' % (lineno, totaltime))

_fn2mod = {}

def label(code, calltree=False):

    if isinstance(code, str):

        return code

    try:

        mname = _fn2mod[code.co_filename]

    except KeyError:

        for k, v in sys.modules.items():

            if v is None:

                continue

            if getattr(v, '__file__', None) is None:

                continue

            if not isinstance(v.__file__, str):

                continue

            if v.__file__.startswith(code.co_filename):

                mname = _fn2mod[code.co_filename] = k

                break

        else:

            mname = _fn2mod[code.co_filename] = '<%s>'%code.co_filename

    if calltree:

        return '%s %s:%d' % (code.co_name, mname, code.co_firstlineno)

    else:

        return '%s:%d(%s)' % (mname, code.co_firstlineno, code.co_name)

if __name__ == '__main__':

    import os

    sys.argv = sys.argv[1:]

    if not sys.argv:

        sys.stderr.write("usage: lsprof.py <script> <arguments...>\n")

        sys.exit(2)

    sys.path.insert(0, os.path.abspath(os.path.dirname(sys.argv[0])))

    stats = profile(execfile, sys.argv[0], globals(), locals())

    stats.sort()

    stats.pprint()