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efa270fa44
Only building for desktop platforms for now, as Android, iOS and Web builds would all be obsolete and unable to run on current devices.
244 lines
7.4 KiB
Python
244 lines
7.4 KiB
Python
"""SCons.Debug
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Code for debugging SCons internal things. Shouldn't be
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needed by most users. Quick shortcuts:
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from SCons.Debug import caller_trace
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caller_trace()
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"""
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#
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# Copyright (c) 2001 - 2019 The SCons Foundation
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
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# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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__revision__ = "src/engine/SCons/Debug.py bee7caf9defd6e108fc2998a2520ddb36a967691 2019-12-17 02:07:09 bdeegan"
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import os
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import sys
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import time
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import weakref
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import inspect
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# Global variable that gets set to 'True' by the Main script,
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# when the creation of class instances should get tracked.
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track_instances = False
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# List of currently tracked classes
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tracked_classes = {}
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def logInstanceCreation(instance, name=None):
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if name is None:
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name = instance.__class__.__name__
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if name not in tracked_classes:
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tracked_classes[name] = []
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if hasattr(instance, '__dict__'):
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tracked_classes[name].append(weakref.ref(instance))
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else:
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# weakref doesn't seem to work when the instance
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# contains only slots...
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tracked_classes[name].append(instance)
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def string_to_classes(s):
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if s == '*':
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return sorted(tracked_classes.keys())
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else:
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return s.split()
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def fetchLoggedInstances(classes="*"):
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classnames = string_to_classes(classes)
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return [(cn, len(tracked_classes[cn])) for cn in classnames]
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def countLoggedInstances(classes, file=sys.stdout):
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for classname in string_to_classes(classes):
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file.write("%s: %d\n" % (classname, len(tracked_classes[classname])))
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def listLoggedInstances(classes, file=sys.stdout):
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for classname in string_to_classes(classes):
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file.write('\n%s:\n' % classname)
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for ref in tracked_classes[classname]:
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if inspect.isclass(ref):
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obj = ref()
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else:
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obj = ref
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if obj is not None:
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file.write(' %s\n' % repr(obj))
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def dumpLoggedInstances(classes, file=sys.stdout):
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for classname in string_to_classes(classes):
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file.write('\n%s:\n' % classname)
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for ref in tracked_classes[classname]:
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obj = ref()
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if obj is not None:
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file.write(' %s:\n' % obj)
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for key, value in obj.__dict__.items():
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file.write(' %20s : %s\n' % (key, value))
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if sys.platform[:5] == "linux":
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# Linux doesn't actually support memory usage stats from getrusage().
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def memory():
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with open('/proc/self/stat') as f:
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mstr = f.read()
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mstr = mstr.split()[22]
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return int(mstr)
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elif sys.platform[:6] == 'darwin':
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#TODO really get memory stats for OS X
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def memory():
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return 0
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else:
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try:
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import resource
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except ImportError:
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try:
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import win32process
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import win32api
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except ImportError:
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def memory():
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return 0
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else:
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def memory():
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process_handle = win32api.GetCurrentProcess()
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memory_info = win32process.GetProcessMemoryInfo( process_handle )
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return memory_info['PeakWorkingSetSize']
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else:
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def memory():
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res = resource.getrusage(resource.RUSAGE_SELF)
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return res[4]
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# returns caller's stack
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def caller_stack():
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import traceback
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tb = traceback.extract_stack()
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# strip itself and the caller from the output
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tb = tb[:-2]
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result = []
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for back in tb:
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# (filename, line number, function name, text)
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key = back[:3]
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result.append('%s:%d(%s)' % func_shorten(key))
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return result
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caller_bases = {}
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caller_dicts = {}
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def caller_trace(back=0):
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"""
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Trace caller stack and save info into global dicts, which
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are printed automatically at the end of SCons execution.
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"""
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global caller_bases, caller_dicts
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import traceback
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tb = traceback.extract_stack(limit=3+back)
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tb.reverse()
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callee = tb[1][:3]
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caller_bases[callee] = caller_bases.get(callee, 0) + 1
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for caller in tb[2:]:
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caller = callee + caller[:3]
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try:
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entry = caller_dicts[callee]
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except KeyError:
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caller_dicts[callee] = entry = {}
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entry[caller] = entry.get(caller, 0) + 1
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callee = caller
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# print a single caller and its callers, if any
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def _dump_one_caller(key, file, level=0):
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leader = ' '*level
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for v,c in sorted([(-v,c) for c,v in caller_dicts[key].items()]):
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file.write("%s %6d %s:%d(%s)\n" % ((leader,-v) + func_shorten(c[-3:])))
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if c in caller_dicts:
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_dump_one_caller(c, file, level+1)
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# print each call tree
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def dump_caller_counts(file=sys.stdout):
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for k in sorted(caller_bases.keys()):
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file.write("Callers of %s:%d(%s), %d calls:\n"
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% (func_shorten(k) + (caller_bases[k],)))
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_dump_one_caller(k, file)
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shorten_list = [
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( '/scons/SCons/', 1),
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( '/src/engine/SCons/', 1),
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( '/usr/lib/python', 0),
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]
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if os.sep != '/':
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shorten_list = [(t[0].replace('/', os.sep), t[1]) for t in shorten_list]
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def func_shorten(func_tuple):
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f = func_tuple[0]
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for t in shorten_list:
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i = f.find(t[0])
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if i >= 0:
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if t[1]:
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i = i + len(t[0])
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return (f[i:],)+func_tuple[1:]
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return func_tuple
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TraceFP = {}
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if sys.platform == 'win32':
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TraceDefault = 'con'
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else:
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TraceDefault = '/dev/tty'
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TimeStampDefault = None
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StartTime = time.time()
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PreviousTime = StartTime
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def Trace(msg, file=None, mode='w', tstamp=None):
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"""Write a trace message to a file. Whenever a file is specified,
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it becomes the default for the next call to Trace()."""
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global TraceDefault
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global TimeStampDefault
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global PreviousTime
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if file is None:
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file = TraceDefault
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else:
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TraceDefault = file
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if tstamp is None:
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tstamp = TimeStampDefault
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else:
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TimeStampDefault = tstamp
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try:
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fp = TraceFP[file]
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except KeyError:
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try:
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fp = TraceFP[file] = open(file, mode)
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except TypeError:
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# Assume we were passed an open file pointer.
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fp = file
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if tstamp:
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now = time.time()
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fp.write('%8.4f %8.4f: ' % (now - StartTime, now - PreviousTime))
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PreviousTime = now
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fp.write(msg)
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fp.flush()
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fp.close()
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# Local Variables:
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# tab-width:4
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# indent-tabs-mode:nil
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# End:
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# vim: set expandtab tabstop=4 shiftwidth=4:
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