cpython.git - https://github.com/python/cpython.git

diff options

author	Michael W. Hudson <mwh@python.net>	2005-06-20 16:52:57 (GMT)
committer	Michael W. Hudson <mwh@python.net>	2005-06-20 16:52:57 (GMT)
commit	188d4366bed88bbca777c05e7f1a5cb3878ff335 (patch)
tree	b77be5cef3108cf44dbf6bcd8e53dc23a77112e7 /Python
parent	fb662972e001aa051e5085862cf5eac323e1756f (diff)
download	cpython-188d4366bed88bbca777c05e7f1a5cb3878ff335.zip cpython-188d4366bed88bbca777c05e7f1a5cb3878ff335.tar.gz cpython-188d4366bed88bbca777c05e7f1a5cb3878ff335.tar.bz2

Fix bug:

[ 1163563 ] Sub threads execute in restricted mode basically by fixing bug 1010677 in a non-broken way. Backport candidate.

Diffstat (limited to 'Python')

-rw-r--r--

Python/pystate.c

1 files changed, 53 insertions, 15 deletions

"""SCons.Script.SConscript This module defines the Python API provided to SConscript and SConstruct files. """ # # __COPYRIGHT__ # # 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__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__" import SCons import SCons.Action import SCons.Builder import SCons.Defaults import SCons.Environment import SCons.Errors import SCons.Node import SCons.Node.Alias import SCons.Node.FS import SCons.Node.Python import SCons.Platform import SCons.SConf import SCons.Script import SCons.Util import SCons.Options import os import os.path import re import string import sys import traceback import types def do_nothing(text): pass HelpFunction = do_nothing arguments = {} launch_dir = os.path.abspath(os.curdir) # global exports set by Export(): global_exports = {} # chdir flag sconscript_chdir = 1 def SConscriptChdir(flag): global sconscript_chdir sconscript_chdir = flag def _scons_add_args(alist): global arguments for arg in alist: a, b = string.split(arg, '=', 2) arguments[a] = b def get_calling_namespaces(): """Return the locals and globals for the function that called into this module in the current callstack.""" try: 1/0 except: frame = sys.exc_info()[2].tb_frame while frame.f_globals.get("__name__") == __name__: frame = frame.f_back return frame.f_locals, frame.f_globals def compute_exports(exports): """Compute a dictionary of exports given one of the parameters to the Export() function or the exports argument to SConscript().""" exports = SCons.Util.Split(exports) loc, glob = get_calling_namespaces() retval = {} try: for export in exports: if SCons.Util.is_Dict(export): retval.update(export) else: try: retval[export] = loc[export] except KeyError: retval[export] = glob[export] except KeyError, x: raise SCons.Errors.UserError, "Export of non-existant variable '%s'"%x return retval class Frame: """A frame on the SConstruct/SConscript call stack""" def __init__(self, exports, sconscript): self.globals = BuildDefaultGlobals() self.retval = None self.prev_dir = SCons.Node.FS.default_fs.getcwd() self.exports = compute_exports(exports) # exports from the calling SConscript # make sure the sconscript attr is a Node. if isinstance(sconscript, SCons.Node.Node): self.sconscript = sconscript else: self.sconscript = SCons.Node.FS.default_fs.File(str(sconscript)) # the SConstruct/SConscript call stack: stack = [] # For documentation on the methods in this file, see the scons man-page def Return(*vars): retval = [] try: for var in vars: for v in string.split(var): retval.append(stack[-1].globals[v]) except KeyError, x: raise SCons.Errors.UserError, "Return of non-existant variable '%s'"%x if len(retval) == 1: stack[-1].retval = retval[0] else: stack[-1].retval = tuple(retval) # This function is responsible for converting the parameters passed to # SConscript() calls into a list of files and export variables. If the # parameters are invalid, throws SCons.Errors.UserError. Returns a tuple # (l, e) where l is a list of SConscript filenames and e is a list of # exports. def GetSConscriptFilenames(ls, kw): exports = [] if len(ls) == 0: try: dirs = kw["dirs"] except KeyError: raise SCons.Errors.UserError, \ "Invalid SConscript usage - no parameters" if not SCons.Util.is_List(dirs): dirs = [ dirs ] dirs = map(str, dirs) name = kw.get('name', 'SConscript') files = map(lambda n, name = name: os.path.join(n, name), dirs) elif len(ls) == 1: files = ls[0] elif len(ls) == 2: files = ls[0] exports = SCons.Util.Split(ls[1]) else: raise SCons.Errors.UserError, \ "Invalid SConscript() usage - too many arguments" if not SCons.Util.is_List(files): files = [ files ] if kw.get('exports'): exports.extend(SCons.Util.Split(kw['exports'])) build_dir = kw.get('build_dir') if build_dir: if len(files) != 1: raise SCons.Errors.UserError, \ "Invalid SConscript() usage - can only specify one SConscript with a build_dir" duplicate = kw.get('duplicate', 1) src_dir = kw.get('src_dir') if not src_dir: src_dir, fname = os.path.split(str(files[0])) else: if not isinstance(src_dir, SCons.Node.Node): src_dir = SCons.Node.FS.default_fs.Dir(src_dir) fn = files[0] if not isinstance(fn, SCons.Node.Node): fn = SCons.Node.FS.default_fs.File(fn) if fn.is_under(src_dir): # Get path relative to the source directory. fname = fn.get_path(src_dir) else: # Fast way to only get the terminal path component of a Node. fname = fn.get_path(fn.dir) SCons.Node.FS.default_fs.BuildDir(build_dir, src_dir, duplicate) files = [os.path.join(str(build_dir), fname)] return (files, exports) def _SConscript(fs, *ls, **kw): files, exports = GetSConscriptFilenames(ls, kw) top = fs.Top sd = fs.SConstruct_dir.rdir() # evaluate each SConscript file results = [] for fn in files: stack.append(Frame(exports,fn)) old_sys_path = sys.path try: if fn == "-": exec sys.stdin in stack[-1].globals else: if isinstance(fn, SCons.Node.Node): f = fn else: f = fs.File(str(fn)) _file_ = None # Change directory to the top of the source # tree to make sure the os's cwd and the cwd of # fs match so we can open the SConscript. fs.chdir(top, change_os_dir=1) if f.rexists(): _file_ = open(f.rstr(), "r") elif f.has_src_builder(): # The SConscript file apparently exists in a source # code management system. Build it, but then clear # the builder so that it doesn't get built *again* # during the actual build phase. f.build() f.builder_set(None) s = str(f) if os.path.exists(s): _file_ = open(s, "r") if _file_: # Chdir to the SConscript directory. Use a path # name relative to the SConstruct file so that if # we're using the -f option, we're essentially # creating a parallel SConscript directory structure # in our local directory tree. # # XXX This is broken for multiple-repository cases # where the SConstruct and SConscript files might be # in different Repositories. For now, cross that # bridge when someone comes to it. ldir = fs.Dir(f.dir.get_path(sd)) try: fs.chdir(ldir, change_os_dir=sconscript_chdir) except OSError: # There was no local directory, so we should be # able to chdir to the Repository directory. # Note that we do this directly, not through # fs.chdir(), because we still need to # interpret the stuff within the SConscript file # relative to where we are logically. fs.chdir(ldir, change_os_dir=0) os.chdir(f.rfile().dir.get_abspath()) # Append the SConscript directory to the beginning # of sys.path so Python modules in the SConscript # directory can be easily imported. sys.path = [ f.dir.get_abspath() ] + sys.path # This is the magic line that actually reads up and # executes the stuff in the SConscript file. We # look for the "exec _file_ " from the beginning # of this line to find the right stack frame (the # next one) describing the SConscript file and line # number that creates a node. exec _file_ in stack[-1].globals else: sys.stderr.write("Ignoring missing SConscript '%s'\n" % f.path) finally: sys.path = old_sys_path frame = stack.pop() try: fs.chdir(frame.prev_dir, change_os_dir=sconscript_chdir) except OSError: # There was no local directory, so chdir to the # Repository directory. Like above, we do this # directly. fs.chdir(frame.prev_dir, change_os_dir=0) os.chdir(frame.prev_dir.rdir().get_abspath()) results.append(frame.retval) # if we only have one script, don't return a tuple if len(results) == 1: return results[0] else: return tuple(results) def is_our_exec_statement(line): return not line is None and line[:12] == "exec _file_ " def SConscript_exception(file=sys.stderr): """Print an exception stack trace just for the SConscript file(s). This will show users who have Python errors where the problem is, without cluttering the output with all of the internal calls leading up to where we exec the SConscript.""" stack = traceback.extract_tb(sys.exc_traceback) last_text = "" i = 0 for frame in stack: if is_our_exec_statement(last_text): break i = i + 1 last_text = frame[3] type = str(sys.exc_type) if type[:11] == "exceptions.": type = type[11:] file.write('%s: %s:\n' % (type, sys.exc_value)) for fname, line, func, text in stack[i:]: file.write(' File "%s", line %d:\n' % (fname, line)) file.write(' %s\n' % text) def annotate(node): """Annotate a node with the stack frame describing the SConscript file and line number that created it.""" stack = traceback.extract_stack() last_text = "" for frame in stack: # If the script text of the previous frame begins with the # magic "exec _file_ " string, then this frame describes the # SConscript file and line number that caused this node to be # created. Record the tuple and carry on. if is_our_exec_statement(last_text): node.creator = frame return last_text = frame[3] # The following line would cause each Node to be annotated using the # above function. Unfortunately, this is a *huge* performance hit, so # leave this disabled until we find a more efficient mechanism. #SCons.Node.Annotate = annotate class SConsEnvironment(SCons.Environment.Base): """An Environment subclass that contains all of the methods that are particular to the wrapper SCons interface and which aren't (or shouldn't be) part of the build engine itself. """ # # Private functions of an SConsEnvironment. # def _check_version(self, major, minor, version_string): """Return 0 if 'major' and 'minor' are greater than the version in 'version_string', and 1 otherwise.""" try: v_major, v_minor, v_micro, release, serial = sys.version_info except AttributeError: version = string.split(string.split(version_string, ' ')[0], '.') v_major = int(version[0]) v_minor = int(re.match('\d+', version[1]).group()) if major > v_major or (major == v_major and minor > v_minor): return 0 else: return 1 # # Public functions of an SConsEnvironment. These get # entry points in the global name space so they can be called # as global functions. # def EnsureSConsVersion(self, major, minor): """Exit abnormally if the SCons version is not late enough.""" if not self._check_version(major,minor,SCons.__version__): print "SCons %d.%d or greater required, but you have SCons %s" %(major,minor,SCons.__version__) sys.exit(2) def EnsurePythonVersion(self, major, minor): """Exit abnormally if the Python version is not late enough.""" if not self._check_version(major,minor,sys.version): v = string.split(sys.version, " ", 1)[0] print "Python %d.%d or greater required, but you have Python %s" %(major,minor,v) sys.exit(2) def Exit(self, value=0): sys.exit(value) def Export(self, *vars): for var in vars: global_exports.update(compute_exports(var)) def GetLaunchDir(self): global launch_dir return launch_dir def GetOption(self, name): name = self.subst(name) return SCons.Script.ssoptions.get(name) def Help(self, text): text = self.subst(text, raw=1) HelpFunction(text) def Import(self, *vars): try: for var in vars: var = SCons.Util.Split(var) for v in var: if v == '*': stack[-1].globals.update(global_exports) stack[-1].globals.update(stack[-1].exports) else: if stack[-1].exports.has_key(v): stack[-1].globals[v] = stack[-1].exports[v] else: stack[-1].globals[v] = global_exports[v] except KeyError,x: raise SCons.Errors.UserError, "Import of non-existant variable '%s'"%x def SConscript(self, *ls, **kw): ls = map(lambda l, self=self: self.subst(l), ls) subst_kw = {} for key, val in kw.items(): if SCons.Util.is_String(val): val = self.subst(val) subst_kw[key] = val return apply(_SConscript, [self.fs,] + ls, subst_kw) def SetOption(self, name, value): name = self.subst(name) SCons.Script.ssoptions.set(name, value) # # # SCons.Environment.Environment = SConsEnvironment def SetBuildSignatureType(type): SCons.Warnings.warn(SCons.Warnings.DeprecatedWarning, "The SetBuildSignatureType() function has been deprecated;\n" +\ "\tuse the TargetSignatures() function instead.") SCons.Defaults.DefaultEnvironment().TargetSignatures(type) def SetContentSignatureType(type): SCons.Warnings.warn(SCons.Warnings.DeprecatedWarning, "The SetContentSignatureType() function has been deprecated;\n" +\ "\tuse the SourceSignatures() function instead.") SCons.Defaults.DefaultEnvironment().SourceSignatures(type) class Options(SCons.Options.Options): def __init__(self, files=None, args=arguments): SCons.Options.Options.__init__(self, files, args) def GetJobs(): SCons.Warnings.warn(SCons.Warnings.DeprecatedWarning, "The GetJobs() function has been deprecated;\n" +\ "\tuse GetOption('num_jobs') instead.") return GetOption('num_jobs') def SetJobs(num): SCons.Warnings.warn(SCons.Warnings.DeprecatedWarning, "The SetJobs() function has been deprecated;\n" +\ "\tuse SetOption('num_jobs', num) instead.") SetOption('num_jobs', num) def Alias(name): alias = SCons.Node.Alias.default_ans.lookup(name) if alias is None: alias = SCons.Node.Alias.default_ans.Alias(name) return alias # _DefaultEnvironmentProxy = None def get_DefaultEnvironmentProxy(): global _DefaultEnvironmentProxy if not _DefaultEnvironmentProxy: class EnvironmentProxy(SCons.Environment.Environment): """A proxy subclass for an environment instance that overrides the subst() and subst_list() methods so they don't actually actually perform construction variable substitution. This is specifically intended to be the shim layer in between global function calls (which don't want want construction variable substitution) and the DefaultEnvironment() (which would substitute variables if left to its own devices).""" def __init__(self, subject): self.__dict__['__subject'] = subject def __getattr__(self, name): return getattr(self.__dict__['__subject'], name) def __setattr__(self, name, value): return setattr(self.__dict__['__subject'], name, value) def subst(self, string, raw=0, target=None, source=None): return string def subst_list(self, string, raw=0, target=None, source=None): return string default_env = SCons.Defaults.DefaultEnvironment() _DefaultEnvironmentProxy = EnvironmentProxy(default_env) return _DefaultEnvironmentProxy def BuildDefaultGlobals(): """ Create a dictionary containing all the default globals for SConstruct and SConscript files. """ globals = {} globals['Action'] = SCons.Action.Action globals['Alias'] = Alias globals['ARGUMENTS'] = arguments globals['Builder'] = SCons.Builder.Builder globals['Configure'] = SCons.SConf.SConf globals['CScan'] = SCons.Defaults.CScan globals['DefaultEnvironment'] = SCons.Defaults.DefaultEnvironment globals['Environment'] = SCons.Environment.Environment globals['GetCommandHandler'] = SCons.Action.GetCommandHandler globals['Literal'] = SCons.Util.Literal globals['Options'] = Options globals['ParseConfig'] = SCons.Util.ParseConfig globals['Platform'] = SCons.Platform.Platform globals['Return'] = Return globals['SConscriptChdir'] = SConscriptChdir globals['Scanner'] = SCons.Scanner.Base globals['SetCommandHandler'] = SCons.Action.SetCommandHandler globals['Split'] = SCons.Util.Split globals['Tool'] = SCons.Tool.Tool globals['Value'] = SCons.Node.Python.Value globals['WhereIs'] = SCons.Util.WhereIs # Deprecated functions, leave this here for now. globals['GetJobs'] = GetJobs globals['SetBuildSignatureType'] = SetBuildSignatureType globals['SetContentSignatureType'] = SetContentSignatureType globals['SetJobs'] = SetJobs class DefaultEnvironmentCall: """A class that implements "global function" calls of Environment methods by fetching the specified method from the DefaultEnvironment's class. Note that this uses an intermediate proxy class instead of calling the DefaultEnvironment method directly so that the proxy can override the subst() method and thereby prevent expansion of construction variables (since from the user's point of view this was called as a global function, with no associated construction environment).""" def __init__(self, method_name): self.method_name = method_name def __call__(self, *args, **kw): proxy = get_DefaultEnvironmentProxy() method = getattr(proxy.__class__, self.method_name) return apply(method, (proxy,) + args, kw) EnvironmentMethods = [ 'AddPostAction', 'AddPreAction', 'AlwaysBuild', 'BuildDir', 'CacheDir', 'Clean', 'Command', 'Default', 'Depends', 'Dir', 'File', 'FindFile', 'GetBuildPath', 'Ignore', 'Install', 'InstallAs', 'Local', 'Precious', 'Repository', 'SConsignFile', 'SideEffect', 'SourceCode', 'SourceSignatures', 'TargetSignatures', ] SConsEnvironmentMethods = [ 'EnsurePythonVersion', 'EnsureSConsVersion', 'Exit', 'Export', 'GetLaunchDir', 'GetOption', 'Help', 'Import', 'SConscript', 'SetOption', ] for name in EnvironmentMethods + SConsEnvironmentMethods: globals[name] = DefaultEnvironmentCall(name) return globals


context:
space:
mode: