]> CyberLeo.Net >> Repos - FreeBSD/FreeBSD.git/blob - examples/summaries/cocoa/metrics.py
Vendor import of lldb trunk r290819:
[FreeBSD/FreeBSD.git] / examples / summaries / cocoa / metrics.py
1 """
2 Objective-C runtime wrapper for use by LLDB Python formatters
3
4 part of The LLVM Compiler Infrastructure
5 This file is distributed under the University of Illinois Open Source
6 License. See LICENSE.TXT for details.
7 """
8 import lldb
9 import time
10 import datetime
11 import inspect
12
13
14 class TimeMetrics:
15
16     @staticmethod
17     def generate(label=None):
18         return TimeMetrics(label)
19
20     def __init__(self, lbl=None):
21         self.label = "" if lbl is None else lbl
22         pass
23
24     def __enter__(self):
25         caller = inspect.stack()[1]
26         self.function = str(caller)
27         self.enter_time = time.clock()
28
29     def __exit__(self, a, b, c):
30         self.exit_time = time.clock()
31         print("It took " + str(self.exit_time - self.enter_time) +
32               " time units to run through " + self.function + self.label)
33         return False
34
35
36 class Counter:
37
38     def __init__(self):
39         self.count = 0
40         self.list = []
41
42     def update(self, name):
43         self.count = self.count + 1
44         # avoid getting the full dump of this ValueObject just to save its
45         # metrics
46         if isinstance(name, lldb.SBValue):
47             self.list.append(name.GetName())
48         else:
49             self.list.append(str(name))
50
51     def __str__(self):
52         return str(self.count) + " times, for items [" + str(self.list) + "]"
53
54
55 class MetricsPrinter_Verbose:
56
57     def __init__(self, metrics):
58         self.metrics = metrics
59
60     def __str__(self):
61         string = ""
62         for key, value in self.metrics.metrics.items():
63             string = string + "metric " + str(key) + ": " + str(value) + "\n"
64         return string
65
66
67 class MetricsPrinter_Compact:
68
69     def __init__(self, metrics):
70         self.metrics = metrics
71
72     def __str__(self):
73         string = ""
74         for key, value in self.metrics.metrics.items():
75             string = string + "metric " + \
76                 str(key) + " was hit " + str(value.count) + " times\n"
77         return string
78
79
80 class Metrics:
81
82     def __init__(self):
83         self.metrics = {}
84
85     def add_metric(self, name):
86         self.metrics[name] = Counter()
87
88     def metric_hit(self, metric, trigger):
89         self.metrics[metric].update(trigger)
90
91     def __getitem__(self, key):
92         return self.metrics[key]
93
94     def __getattr__(self, name):
95         if name == 'compact':
96             return MetricsPrinter_Compact(self)
97         if name == 'verbose':
98             return MetricsPrinter_Verbose(self)
99         raise AttributeError("%r object has no attribute %r" %
100                              (type(self).__name__, name))
101
102     def __str__(self):
103         return str(self.verbose)
104
105     def metric_success(self, metric):
106         total_count = 0
107         metric_count = self[metric].count
108         for key, value in self.metrics.items():
109             total_count = total_count + value.count
110         if total_count > 0:
111             return metric_count / float(total_count)
112         return 0