Mercurial Repositories > eric / file comparison
comparison: DebugClients/Python/PyProfile.py
DebugClients/Python/PyProfile.py
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| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2002 - 2009 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 | |
| 5 """ | |
| 6 Module defining additions to the standard Python profile.py. | |
| 7 """ | |
| 8 | |
| 9 import os | |
| 10 import marshal | |
| 11 import types | |
| 12 import profile | |
| 13 import atexit | |
| 14 import pickle | |
| 15 | |
| 16 class PyProfile(profile.Profile): | |
| 17 """ | |
| 18 Class extending the standard Python profiler with additional methods. | |
| 19 | |
| 20 This class extends the standard Python profiler by the functionality to | |
| 21 save the collected timing data in a timing cache, to restore these data | |
| 22 on subsequent calls, to store a profile dump to a standard filename and | |
| 23 to erase these caches. | |
| 24 """ | |
| 25 def __init__(self, basename, timer=None, bias=None): | |
| 26 """ | |
| 27 Constructor | |
| 28 | |
| 29 @param basename name of the script to be profiled (string) | |
| 30 @param timer function defining the timing calculation | |
| 31 @param bias calibration value (float) | |
| 32 """ | |
| 33 try: | |
| 34 profile.Profile.__init__(self, timer, bias) | |
| 35 except TypeError: | |
| 36 profile.Profile.__init__(self, timer) | |
| 37 | |
| 38 self.dispatch = self.__class__.dispatch | |
| 39 | |
| 40 basename = os.path.splitext(basename)[0] | |
| 41 self.profileCache = "%s.profile" % basename | |
| 42 self.timingCache = "%s.timings" % basename | |
| 43 | |
| 44 self.__restore() | |
| 45 atexit.register(self.save) | |
| 46 | |
| 47 def __restore(self): | |
| 48 """ | |
| 49 Private method to restore the timing data from the timing cache. | |
| 50 """ | |
| 51 if not os.path.exists(self.timingCache): | |
| 52 return | |
| 53 | |
| 54 try: | |
| 55 cache = open(self.timingCache, 'rb') | |
| 56 timings = marshal.load(cache) | |
| 57 cache.close() | |
| 58 if isinstance(timings, type.DictType): | |
| 59 self.timings = timings | |
| 60 except: | |
| 61 pass | |
| 62 | |
| 63 def save(self): | |
| 64 """ | |
| 65 Public method to store the collected profile data. | |
| 66 """ | |
| 67 # dump the raw timing data | |
| 68 cache = open(self.timingCache, 'wb') | |
| 69 marshal.dump(self.timings, cache) | |
| 70 cache.close() | |
| 71 | |
| 72 # dump the profile data | |
| 73 self.dump_stats(self.profileCache) | |
| 74 | |
| 75 def dump_stats(self, file): | |
| 76 """ | |
| 77 Public method to dump the statistics data. | |
| 78 | |
| 79 @param file name of the file to write to (string) | |
| 80 """ | |
| 81 try: | |
| 82 f = open(file, 'wb') | |
| 83 self.create_stats() | |
| 84 pickle.dump(self.stats, f, 2) | |
| 85 except (EnvironmentError, pickle.PickleError): | |
| 86 pass | |
| 87 finally: | |
| 88 f.close() | |
| 89 | |
| 90 def erase(self): | |
| 91 """ | |
| 92 Public method to erase the collected timing data. | |
| 93 """ | |
| 94 self.timings = {} | |
| 95 if os.path.exists(self.timingCache): | |
| 96 os.remove(self.timingCache) | |
| 97 | |
| 98 def fix_frame_filename(self, frame): | |
| 99 """ | |
| 100 Public method used to fixup the filename for a given frame. | |
| 101 | |
| 102 The logic employed here is that if a module was loaded | |
| 103 from a .pyc file, then the correct .py to operate with | |
| 104 should be in the same path as the .pyc. The reason this | |
| 105 logic is needed is that when a .pyc file is generated, the | |
| 106 filename embedded and thus what is readable in the code object | |
| 107 of the frame object is the fully qualified filepath when the | |
| 108 pyc is generated. If files are moved from machine to machine | |
| 109 this can break debugging as the .pyc will refer to the .py | |
| 110 on the original machine. Another case might be sharing | |
| 111 code over a network... This logic deals with that. | |
| 112 | |
| 113 @param frame the frame object | |
| 114 """ | |
| 115 # get module name from __file__ | |
| 116 if not isinstance(frame, profile.Profile.fake_frame) and \ | |
| 117 frame.f_globals.has_key('__file__'): | |
| 118 root, ext = os.path.splitext(frame.f_globals['__file__']) | |
| 119 if ext == '.pyc' or ext == '.py': | |
| 120 fixedName = root + '.py' | |
| 121 if os.path.exists(fixedName): | |
| 122 return fixedName | |
| 123 | |
| 124 return frame.f_code.co_filename | |
| 125 | |
| 126 def trace_dispatch_call(self, frame, t): | |
| 127 """ | |
| 128 Private method used to trace functions calls. | |
| 129 | |
| 130 This is a variant of the one found in the standard Python | |
| 131 profile.py calling fix_frame_filename above. | |
| 132 """ | |
| 133 if self.cur and frame.f_back is not self.cur[-2]: | |
| 134 rpt, rit, ret, rfn, rframe, rcur = self.cur | |
| 135 if not isinstance(rframe, profile.Profile.fake_frame): | |
| 136 assert rframe.f_back is frame.f_back, ("Bad call", rfn, | |
| 137 rframe, rframe.f_back, | |
| 138 frame, frame.f_back) | |
| 139 self.trace_dispatch_return(rframe, 0) | |
| 140 assert (self.cur is None or \ | |
| 141 frame.f_back is self.cur[-2]), ("Bad call", | |
| 142 self.cur[-3]) | |
| 143 fcode = frame.f_code | |
| 144 fn = (self.fix_frame_filename(frame), | |
| 145 fcode.co_firstlineno, fcode.co_name) | |
| 146 self.cur = (t, 0, 0, fn, frame, self.cur) | |
| 147 timings = self.timings | |
| 148 if timings.has_key(fn): | |
| 149 cc, ns, tt, ct, callers = timings[fn] | |
| 150 timings[fn] = cc, ns + 1, tt, ct, callers | |
| 151 else: | |
| 152 timings[fn] = 0, 0, 0, 0, {} | |
| 153 return 1 | |
| 154 | |
| 155 dispatch = { | |
| 156 "call": trace_dispatch_call, | |
| 157 "exception": profile.Profile.trace_dispatch_exception, | |
| 158 "return": profile.Profile.trace_dispatch_return, | |
| 159 "c_call": profile.Profile.trace_dispatch_c_call, | |
| 160 "c_exception": profile.Profile.trace_dispatch_return, # the C function returned | |
| 161 "c_return": profile.Profile.trace_dispatch_return, | |
| 162 } |
