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"""SCons.Debug
Code for debugging SCons internal things. Shouldn't be
needed by most users.
"""
#
# Copyright (c) 2001 - 2015 The SCons Foundation
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
__revision__ = "src/engine/SCons/Debug.py rel_2.4.1:3453:73fefd3ea0b0 2015/11/09 03:25:05 bdbaddog"
import os
import sys
import time
import weakref
import inspect
# Global variable that gets set to 'True' by the Main script,
# when the creation of class instances should get tracked.
track_instances = False
# List of currently tracked classes
tracked_classes = {}
def logInstanceCreation(instance, name=None):
if name is None:
name = instance.__class__.__name__
if name not in tracked_classes:
tracked_classes[name] = []
if hasattr(instance, '__dict__'):
tracked_classes[name].append(weakref.ref(instance))
else:
# weakref doesn't seem to work when the instance
# contains only slots...
tracked_classes[name].append(instance)
def string_to_classes(s):
if s == '*':
return sorted(tracked_classes.keys())
else:
return s.split()
def fetchLoggedInstances(classes="*"):
classnames = string_to_classes(classes)
return [(cn, len(tracked_classes[cn])) for cn in classnames]
def countLoggedInstances(classes, file=sys.stdout):
for classname in string_to_classes(classes):
file.write("%s: %d\n" % (classname, len(tracked_classes[classname])))
def listLoggedInstances(classes, file=sys.stdout):
for classname in string_to_classes(classes):
file.write('\n%s:\n' % classname)
for ref in tracked_classes[classname]:
if inspect.isclass(ref):
obj = ref()
else:
obj = ref
if obj is not None:
file.write(' %s\n' % repr(obj))
def dumpLoggedInstances(classes, file=sys.stdout):
for classname in string_to_classes(classes):
file.write('\n%s:\n' % classname)
for ref in tracked_classes[classname]:
obj = ref()
if obj is not None:
file.write(' %s:\n' % obj)
for key, value in obj.__dict__.items():
file.write(' %20s : %s\n' % (key, value))
if sys.platform[:5] == "linux":
# Linux doesn't actually support memory usage stats from getrusage().
def memory():
mstr = open('/proc/self/stat').read()
mstr = mstr.split()[22]
return int(mstr)
elif sys.platform[:6] == 'darwin':
#TODO really get memory stats for OS X
def memory():
return 0
else:
try:
import resource
except ImportError:
try:
import win32process
import win32api
except ImportError:
def memory():
return 0
else:
def memory():
process_handle = win32api.GetCurrentProcess()
memory_info = win32process.GetProcessMemoryInfo( process_handle )
return memory_info['PeakWorkingSetSize']
else:
def memory():
res = resource.getrusage(resource.RUSAGE_SELF)
return res[4]
# returns caller's stack
def caller_stack():
import traceback
tb = traceback.extract_stack()
# strip itself and the caller from the output
tb = tb[:-2]
result = []
for back in tb:
# (filename, line number, function name, text)
key = back[:3]
result.append('%s:%d(%s)' % func_shorten(key))
return result
caller_bases = {}
caller_dicts = {}
# trace a caller's stack
def caller_trace(back=0):
import traceback
tb = traceback.extract_stack(limit=3+back)
tb.reverse()
callee = tb[1][:3]
caller_bases[callee] = caller_bases.get(callee, 0) + 1
for caller in tb[2:]:
caller = callee + caller[:3]
try:
entry = caller_dicts[callee]
except KeyError:
caller_dicts[callee] = entry = {}
entry[caller] = entry.get(caller, 0) + 1
callee = caller
# print a single caller and its callers, if any
def _dump_one_caller(key, file, level=0):
leader = ' '*level
for v,c in sorted([(-v,c) for c,v in caller_dicts[key].items()]):
file.write("%s %6d %s:%d(%s)\n" % ((leader,-v) + func_shorten(c[-3:])))
if c in caller_dicts:
_dump_one_caller(c, file, level+1)
# print each call tree
def dump_caller_counts(file=sys.stdout):
for k in sorted(caller_bases.keys()):
file.write("Callers of %s:%d(%s), %d calls:\n"
% (func_shorten(k) + (caller_bases[k],)))
_dump_one_caller(k, file)
shorten_list = [
( '/scons/SCons/', 1),
( '/src/engine/SCons/', 1),
( '/usr/lib/python', 0),
]
if os.sep != '/':
shorten_list = [(t[0].replace('/', os.sep), t[1]) for t in shorten_list]
def func_shorten(func_tuple):
f = func_tuple[0]
for t in shorten_list:
i = f.find(t[0])
if i >= 0:
if t[1]:
i = i + len(t[0])
return (f[i:],)+func_tuple[1:]
return func_tuple
TraceFP = {}
if sys.platform == 'win32':
TraceDefault = 'con'
else:
TraceDefault = '/dev/tty'
TimeStampDefault = None
StartTime = time.time()
PreviousTime = StartTime
def Trace(msg, file=None, mode='w', tstamp=None):
"""Write a trace message to a file. Whenever a file is specified,
it becomes the default for the next call to Trace()."""
global TraceDefault
global TimeStampDefault
global PreviousTime
if file is None:
file = TraceDefault
else:
TraceDefault = file
if tstamp is None:
tstamp = TimeStampDefault
else:
TimeStampDefault = tstamp
try:
fp = TraceFP[file]
except KeyError:
try:
fp = TraceFP[file] = open(file, mode)
except TypeError:
# Assume we were passed an open file pointer.
fp = file
if tstamp:
now = time.time()
fp.write('%8.4f %8.4f: ' % (now - StartTime, now - PreviousTime))
PreviousTime = now
fp.write(msg)
fp.flush()
# Local Variables:
# tab-width:4
# indent-tabs-mode:nil
# End:
# vim: set expandtab tabstop=4 shiftwidth=4:
|
