SCons.Debug

1 """SCons.Debug 2 3 Code for debugging SCons internal things. Shouldn't be 4 needed by most users. 5 6 """ 7 8 # 9 # Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 The SCons Foundation 10 # 11 # Permission is hereby granted, free of charge, to any person obtaining 12 # a copy of this software and associated documentation files (the 13 # "Software"), to deal in the Software without restriction, including 14 # without limitation the rights to use, copy, modify, merge, publish, 15 # distribute, sublicense, and/or sell copies of the Software, and to 16 # permit persons to whom the Software is furnished to do so, subject to 17 # the following conditions: 18 # 19 # The above copyright notice and this permission notice shall be included 20 # in all copies or substantial portions of the Software. 21 # 22 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY 23 # KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE 24 # WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 25 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 26 # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 27 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 28 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 29 # 30 31 __revision__ = "src/engine/SCons/Debug.py 5357 2011/09/09 21:31:03 bdeegan" 32 33 import os 34 import sys 35 import time 36 import weakref 37 38 tracked_classes = {} 39

40 -def logInstanceCreation(instance, name=None):

41 if name is None: 42 name = instance.__class__.__name__ 43 if name not in tracked_classes: 44 tracked_classes[name] = [] 45 tracked_classes[name].append(weakref.ref(instance))

46

47 -def string_to_classes(s):

48 if s == '*': 49 return sorted(tracked_classes.keys()) 50 else: 51 return s.split()

52

53 -def fetchLoggedInstances(classes="*"):

54 classnames = string_to_classes(classes) 55 return [(cn, len(tracked_classes[cn])) for cn in classnames]

56

57 -def countLoggedInstances(classes, file=sys.stdout):

58 for classname in string_to_classes(classes): 59 file.write("%s: %d\n" % (classname, len(tracked_classes[classname])))

60

61 -def listLoggedInstances(classes, file=sys.stdout):

62 for classname in string_to_classes(classes): 63 file.write('\n%s:\n' % classname) 64 for ref in tracked_classes[classname]: 65 obj = ref() 66 if obj is not None: 67 file.write(' %s\n' % repr(obj))

68

69 -def dumpLoggedInstances(classes, file=sys.stdout):

70 for classname in string_to_classes(classes): 71 file.write('\n%s:\n' % classname) 72 for ref in tracked_classes[classname]: 73 obj = ref() 74 if obj is not None: 75 file.write(' %s:\n' % obj) 76 for key, value in obj.__dict__.items(): 77 file.write(' %20s : %s\n' % (key, value))

78 79 80 81 if sys.platform[:5] == "linux": 82 # Linux doesn't actually support memory usage stats from getrusage().

83 - def memory():

84 mstr = open('/proc/self/stat').read() 85 mstr = mstr.split()[22] 86 return int(mstr)

87 elif sys.platform[:6] == 'darwin': 88 #TODO really get memory stats for OS X

89 - def memory():

90 return 0

91 else: 92 try: 93 import resource 94 except ImportError: 95 try: 96 import win32process 97 import win32api 98 except ImportError:

99 - def memory():

100 return 0

101 else:

102 - def memory():

103 process_handle = win32api.GetCurrentProcess() 104 memory_info = win32process.GetProcessMemoryInfo( process_handle ) 105 return memory_info['PeakWorkingSetSize']

106 else:

107 - def memory():

108 res = resource.getrusage(resource.RUSAGE_SELF) 109 return res[4]

110 111 # returns caller's stack

112 -def caller_stack(*backlist):

113 import traceback 114 if not backlist: 115 backlist = [0] 116 result = [] 117 for back in backlist: 118 tb = traceback.extract_stack(limit=3+back) 119 key = tb[0][:3] 120 result.append('%s:%d(%s)' % func_shorten(key)) 121 return result

122 123 caller_bases = {} 124 caller_dicts = {} 125 126 # trace a caller's stack

127 -def caller_trace(back=0):

128 import traceback 129 tb = traceback.extract_stack(limit=3+back) 130 tb.reverse() 131 callee = tb[1][:3] 132 caller_bases[callee] = caller_bases.get(callee, 0) + 1 133 for caller in tb[2:]: 134 caller = callee + caller[:3] 135 try: 136 entry = caller_dicts[callee] 137 except KeyError: 138 caller_dicts[callee] = entry = {} 139 entry[caller] = entry.get(caller, 0) + 1 140 callee = caller

141 142 # print a single caller and its callers, if any

143 -def _dump_one_caller(key, file, level=0):

144 leader = ' '*level 145 for v,c in sorted([(-v,c) for c,v in caller_dicts[key].items()]): 146 file.write("%s %6d %s:%d(%s)\n" % ((leader,-v) + func_shorten(c[-3:]))) 147 if c in caller_dicts: 148 _dump_one_caller(c, file, level+1)

149 150 # print each call tree

151 -def dump_caller_counts(file=sys.stdout):

152 for k in sorted(caller_bases.keys()): 153 file.write("Callers of %s:%d(%s), %d calls:\n" 154 % (func_shorten(k) + (caller_bases[k],))) 155 _dump_one_caller(k, file)

156 157 shorten_list = [ 158 ( '/scons/SCons/', 1), 159 ( '/src/engine/SCons/', 1), 160 ( '/usr/lib/python', 0), 161 ] 162 163 if os.sep != '/': 164 shorten_list = [(t[0].replace('/', os.sep), t[1]) for t in shorten_list] 165

166 -def func_shorten(func_tuple):

167 f = func_tuple[0] 168 for t in shorten_list: 169 i = f.find(t[0]) 170 if i >= 0: 171 if t[1]: 172 i = i + len(t[0]) 173 return (f[i:],)+func_tuple[1:] 174 return func_tuple

175 176 177 TraceFP = {} 178 if sys.platform == 'win32': 179 TraceDefault = 'con' 180 else: 181 TraceDefault = '/dev/tty' 182 183 TimeStampDefault = None 184 StartTime = time.time() 185 PreviousTime = StartTime 186

187 -def Trace(msg, file=None, mode='w', tstamp=None):

188 """Write a trace message to a file. Whenever a file is specified, 189 it becomes the default for the next call to Trace().""" 190 global TraceDefault 191 global TimeStampDefault 192 global PreviousTime 193 if file is None: 194 file = TraceDefault 195 else: 196 TraceDefault = file 197 if tstamp is None: 198 tstamp = TimeStampDefault 199 else: 200 TimeStampDefault = tstamp 201 try: 202 fp = TraceFP[file] 203 except KeyError: 204 try: 205 fp = TraceFP[file] = open(file, mode) 206 except TypeError: 207 # Assume we were passed an open file pointer. 208 fp = file 209 if tstamp: 210 now = time.time() 211 fp.write('%8.4f %8.4f: ' % (now - StartTime, now - PreviousTime)) 212 PreviousTime = now 213 fp.write(msg) 214 fp.flush()

215 216 # Local Variables: 217 # tab-width:4 218 # indent-tabs-mode:nil 219 # End: 220 # vim: set expandtab tabstop=4 shiftwidth=4: 221

Source Code for Module SCons.Debug