src/python/m5/util/__init__.py - public/gem5 - Git at Google

 # Copyright (c) 2016, 2020-2021 Arm Limited
 # All rights reserved.
 #
 # The license below extends only to copyright in the software and shall
 # not be construed as granting a license to any other intellectual
 # property including but not limited to intellectual property relating
 # to a hardware implementation of the functionality of the software
 # licensed hereunder.  You may use the software subject to the license
 # terms below provided that you ensure that this notice is replicated
 # unmodified and in its entirety in all distributions of the software,
 # modified or unmodified, in source code or in binary form.
 #
 # Copyright (c) 2008-2009 The Hewlett-Packard Development Company
 # Copyright (c) 2004-2006 The Regents of The University of Michigan
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met: redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer;
 # redistributions in binary form must reproduce the above copyright
 # notice, this list of conditions and the following disclaimer in the
 # documentation and/or other materials provided with the distribution;
 # neither the name of the copyright holders nor the names of its
 # contributors may be used to endorse or promote products derived from
 # this software without specific prior written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 import os
 import re
 import sys

 from functools import wraps

 from . import convert

 from .attrdict import attrdict, multiattrdict, optiondict
 from .multidict import multidict

 # panic() should be called when something happens that should never
 # ever happen regardless of what the user does (i.e., an acutal m5
 # bug).
 def panic(fmt, *args):
     print('panic:', fmt % args, file=sys.stderr)
     sys.exit(1)

 # fatal() should be called when the simulation cannot continue due to
 # some condition that is the user's fault (bad configuration, invalid
 # arguments, etc.) and not a simulator bug.
 def fatal(fmt, *args):
     print('fatal:', fmt % args, file=sys.stderr)
     sys.exit(1)

 # warn() should be called when the user should be warned about some condition
 # that may or may not be the user's fault, but that they should be made aware
 # of as it may affect the simulation or results.
 def warn(fmt, *args):
     print('warn:', fmt % args, file=sys.stderr)

 # inform() should be called when the user should be informed about some
 # condition that they may be interested in.
 def inform(fmt, *args):
     print('info:', fmt % args, file=sys.stdout)

 def callOnce(func):
     """Decorator that enables to run a given function only once. Subsequent
     calls are discarded."""
     @wraps(func)
     def wrapper(*args, **kwargs):
         if not wrapper.has_run:
             wrapper.has_run = True
             return func(*args, **kwargs)
     wrapper.has_run = False
     return wrapper

 def deprecated(replacement=None, logger=warn):
     """This decorator warns the user about a deprecated function."""
     def decorator(func):
         @callOnce
         def notifyDeprecation():
             try:
                 func_name = lambda f: f.__module__ + '.' +  f.__qualname__
                 message = f'Function {func_name(func)} is deprecated.'
                 if replacement:
                     message += f' Prefer {func_name(replacement)} instead.'
             except AttributeError:
                 message = f'Function {func} is deprecated.'
                 if replacement:
                     message += f' Prefer {replacement} instead.'
             logger(message)
         notifyDeprecation()
         return func
     return decorator

 class Singleton(type):
     def __call__(cls, *args, **kwargs):
         if hasattr(cls, '_instance'):
             return cls._instance

         cls._instance = super().__call__(*args, **kwargs)
         return cls._instance

 def addToPath(path):
     """Prepend given directory to system module search path.  We may not
     need this anymore if we can structure our config library more like a
     Python package."""

     # if it's a relative path and we know what directory the current
     # python script is in, make the path relative to that directory.
     if not os.path.isabs(path) and sys.path[0]:
         path = os.path.join(sys.path[0], path)
     path = os.path.realpath(path)
     # sys.path[0] should always refer to the current script's directory,
     # so place the new dir right after that.
     sys.path.insert(1, path)

 def repoPath():
     """
     Return the abspath of the gem5 repository.
     This is relying on the following structure:

     <gem5-repo>/build/<ISA>/gem5.[opt,debug...]
     """
     return os.path.dirname(
         os.path.dirname(
             os.path.dirname(sys.executable)))

 # Apply method to object.
 # applyMethod(obj, 'meth', <args>) is equivalent to obj.meth(<args>)
 def applyMethod(obj, meth, *args, **kwargs):
     return getattr(obj, meth)(*args, **kwargs)

 # If the first argument is an (non-sequence) object, apply the named
 # method with the given arguments.  If the first argument is a
 # sequence, apply the method to each element of the sequence (a la
 # 'map').
 def applyOrMap(objOrSeq, meth, *args, **kwargs):
     if not isinstance(objOrSeq, (list, tuple)):
         return applyMethod(objOrSeq, meth, *args, **kwargs)
     else:
         return [applyMethod(o, meth, *args, **kwargs) for o in objOrSeq]

 def crossproduct(items):
     if len(items) == 1:
         for i in items[0]:
             yield (i,)
     else:
         for i in items[0]:
             for j in crossproduct(items[1:]):
                 yield (i,) + j

 def flatten(items):
     while items:
         item = items.pop(0)
         if isinstance(item, (list, tuple)):
             items[0:0] = item
         else:
             yield item

 # force scalars to one-element lists for uniformity
 def makeList(objOrList):
     if isinstance(objOrList, list):
         return objOrList
     return [objOrList]

 def printList(items, indent=4):
     line = ' ' * indent
     for i,item in enumerate(items):
         if len(line) + len(item) > 76:
             print(line)
             line = ' ' * indent

         if i < len(items) - 1:
             line += '%s, ' % item
         else:
             line += item
             print(line)

 def isInteractive():
     """Check if the simulator is run interactively or in a batch environment"""

     return sys.__stdin__.isatty()
	# Copyright (c) 2016, 2020-2021 Arm Limited
	# All rights reserved.
	#
	# The license below extends only to copyright in the software and shall
	# not be construed as granting a license to any other intellectual
	# property including but not limited to intellectual property relating
	# to a hardware implementation of the functionality of the software
	# licensed hereunder. You may use the software subject to the license
	# terms below provided that you ensure that this notice is replicated
	# unmodified and in its entirety in all distributions of the software,
	# modified or unmodified, in source code or in binary form.
	#
	# Copyright (c) 2008-2009 The Hewlett-Packard Development Company
	# Copyright (c) 2004-2006 The Regents of The University of Michigan
	# All rights reserved.
	#
	# Redistribution and use in source and binary forms, with or without
	# modification, are permitted provided that the following conditions are
	# met: redistributions of source code must retain the above copyright
	# notice, this list of conditions and the following disclaimer;
	# redistributions in binary form must reproduce the above copyright
	# notice, this list of conditions and the following disclaimer in the
	# documentation and/or other materials provided with the distribution;
	# neither the name of the copyright holders nor the names of its
	# contributors may be used to endorse or promote products derived from
	# this software without specific prior written permission.
	#
	# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

	import os
	import re
	import sys

	from functools import wraps

	from . import convert

	from .attrdict import attrdict, multiattrdict, optiondict
	from .multidict import multidict

	# panic() should be called when something happens that should never
	# ever happen regardless of what the user does (i.e., an acutal m5
	# bug).
	def panic(fmt, *args):
	print('panic:', fmt % args, file=sys.stderr)
	sys.exit(1)

	# fatal() should be called when the simulation cannot continue due to
	# some condition that is the user's fault (bad configuration, invalid
	# arguments, etc.) and not a simulator bug.
	def fatal(fmt, *args):
	print('fatal:', fmt % args, file=sys.stderr)
	sys.exit(1)

	# warn() should be called when the user should be warned about some condition
	# that may or may not be the user's fault, but that they should be made aware
	# of as it may affect the simulation or results.
	def warn(fmt, *args):
	print('warn:', fmt % args, file=sys.stderr)

	# inform() should be called when the user should be informed about some
	# condition that they may be interested in.
	def inform(fmt, *args):
	print('info:', fmt % args, file=sys.stdout)

	def callOnce(func):
	"""Decorator that enables to run a given function only once. Subsequent
	calls are discarded."""
	@wraps(func)
	def wrapper(args, *kwargs):
	if not wrapper.has_run:
	wrapper.has_run = True
	return func(args, *kwargs)
	wrapper.has_run = False
	return wrapper

	def deprecated(replacement=None, logger=warn):
	"""This decorator warns the user about a deprecated function."""
	def decorator(func):
	@callOnce
	def notifyDeprecation():
	try:
	func_name = lambda f: f.__module__ + '.' + f.__qualname__
	message = f'Function {func_name(func)} is deprecated.'
	if replacement:
	message += f' Prefer {func_name(replacement)} instead.'
	except AttributeError:
	message = f'Function {func} is deprecated.'
	if replacement:
	message += f' Prefer {replacement} instead.'
	logger(message)
	notifyDeprecation()
	return func
	return decorator

	class Singleton(type):
	def __call__(cls, args, *kwargs):
	if hasattr(cls, '_instance'):
	return cls._instance

	cls._instance = super().__call__(args, *kwargs)
	return cls._instance

	def addToPath(path):
	"""Prepend given directory to system module search path. We may not
	need this anymore if we can structure our config library more like a
	Python package."""

	# if it's a relative path and we know what directory the current
	# python script is in, make the path relative to that directory.
	if not os.path.isabs(path) and sys.path[0]:
	path = os.path.join(sys.path[0], path)
	path = os.path.realpath(path)
	# sys.path[0] should always refer to the current script's directory,
	# so place the new dir right after that.
	sys.path.insert(1, path)

	def repoPath():
	"""
	Return the abspath of the gem5 repository.
	This is relying on the following structure:

	<gem5-repo>/build/<ISA>/gem5.[opt,debug...]
	"""
	return os.path.dirname(
	os.path.dirname(
	os.path.dirname(sys.executable)))

	# Apply method to object.
	# applyMethod(obj, 'meth', <args>) is equivalent to obj.meth(<args>)
	def applyMethod(obj, meth, args, *kwargs):
	return getattr(obj, meth)(args, *kwargs)

	# If the first argument is an (non-sequence) object, apply the named
	# method with the given arguments. If the first argument is a
	# sequence, apply the method to each element of the sequence (a la
	# 'map').
	def applyOrMap(objOrSeq, meth, args, *kwargs):
	if not isinstance(objOrSeq, (list, tuple)):
	return applyMethod(objOrSeq, meth, args, *kwargs)
	else:
	return [applyMethod(o, meth, args, *kwargs) for o in objOrSeq]

	def crossproduct(items):
	if len(items) == 1:
	for i in items[0]:
	yield (i,)
	else:
	for i in items[0]:
	for j in crossproduct(items[1:]):
	yield (i,) + j

	def flatten(items):
	while items:
	item = items.pop(0)
	if isinstance(item, (list, tuple)):
	items[0:0] = item
	else:
	yield item

	# force scalars to one-element lists for uniformity
	def makeList(objOrList):
	if isinstance(objOrList, list):
	return objOrList
	return [objOrList]

	def printList(items, indent=4):
	line = ' ' * indent
	for i,item in enumerate(items):
	if len(line) + len(item) > 76:
	print(line)
	line = ' ' * indent

	if i < len(items) - 1:
	line += '%s, ' % item
	else:
	line += item
	print(line)

	def isInteractive():
	"""Check if the simulator is run interactively or in a batch environment"""

	return sys.__stdin__.isatty()