buildtools/wafsamba/samba_optimisation.py

   1 # This file contains waf optimisations for Samba
   2
   3 # most of these optimisations are possible because of the restricted build environment
   4 # that Samba has. For example, Samba doesn't attempt to cope with Win32 paths during the
   5 # build, and Samba doesn't need build varients
   6
   7 # overall this makes some build tasks quite a bit faster
   8
   9 import os
  10 import Build, Utils, Node
  11 from TaskGen import feature, after, before
  12 import preproc
  13
  14 @feature('cc', 'cxx')
  15 @after('apply_type_vars', 'apply_lib_vars', 'apply_core')
  16 def apply_incpaths(self):
  17     lst = []
  18
  19     try:
  20         kak = self.bld.kak
  21     except AttributeError:
  22         kak = self.bld.kak = {}
  23
  24     # TODO move the uselib processing out of here
  25     for lib in self.to_list(self.uselib):
  26         for path in self.env['CPPPATH_' + lib]:
  27             if not path in lst:
  28                 lst.append(path)
  29     if preproc.go_absolute:
  30         for path in preproc.standard_includes:
  31             if not path in lst:
  32                 lst.append(path)
  33
  34     for path in self.to_list(self.includes):
  35         if not path in lst:
  36             if preproc.go_absolute or path[0] != '/':  # os.path.isabs(path):
  37                 lst.append(path)
  38             else:
  39                 self.env.prepend_value('CPPPATH', path)
  40
  41     for path in lst:
  42         node = None
  43         if path[0] == '/': # os.path.isabs(path):
  44             if preproc.go_absolute:
  45                 node = self.bld.root.find_dir(path)
  46         elif path[0] == '#':
  47             node = self.bld.srcnode
  48             if len(path) > 1:
  49                 try:
  50                     node = kak[path]
  51                 except KeyError:
  52                     kak[path] = node = node.find_dir(path[1:])
  53         else:
  54             try:
  55                 node = kak[(self.path.id, path)]
  56             except KeyError:
  57                 kak[(self.path.id, path)] = node = self.path.find_dir(path)
  58
  59         if node:
  60             self.env.append_value('INC_PATHS', node)
  61
  62 @feature('cc')
  63 @after('apply_incpaths')
  64 def apply_obj_vars_cc(self):
  65     """after apply_incpaths for INC_PATHS"""
  66     env = self.env
  67     app = env.append_unique
  68     cpppath_st = env['CPPPATH_ST']
  69
  70     lss = env['_CCINCFLAGS']
  71
  72     try:
  73          cac = self.bld.cac
  74     except AttributeError:
  75          cac = self.bld.cac = {}
  76
  77     # local flags come first
  78     # set the user-defined includes paths
  79     for i in env['INC_PATHS']:
  80
  81         try:
  82             lss.extend(cac[i.id])
  83         except KeyError:
  84
  85             cac[i.id] = [cpppath_st % i.bldpath(env), cpppath_st % i.srcpath(env)]
  86             lss.extend(cac[i.id])
  87
  88     env['_CCINCFLAGS'] = lss
  89     # set the library include paths
  90     for i in env['CPPPATH']:
  91         app('_CCINCFLAGS', cpppath_st % i)
  92
  93 import Node, Environment
  94
  95 def vari(self):
  96     return "default"
  97 Environment.Environment.variant = vari
  98
  99 def variant(self, env):
 100     if not env: return 0
 101     elif self.id & 3 == Node.FILE: return 0
 102     else: return "default"
 103 Node.Node.variant = variant
 104
 105
 106 import TaskGen, Task
 107
 108 def create_task(self, name, src=None, tgt=None):
 109     task = Task.TaskBase.classes[name](self.env, generator=self)
 110     if src:
 111         task.set_inputs(src)
 112     if tgt:
 113         task.set_outputs(tgt)
 114     return task
 115 TaskGen.task_gen.create_task = create_task
 116
 117 def hash_constraints(self):
 118     a = self.attr
 119     sum = hash((str(a('before', '')),
 120             str(a('after', '')),
 121             str(a('ext_in', '')),
 122             str(a('ext_out', '')),
 123             self.__class__.maxjobs))
 124     return sum
 125 Task.TaskBase.hash_constraints = hash_constraints
 126
 127 def hash_env_vars(self, env, vars_lst):
 128     idx = str(id(env)) + str(vars_lst)
 129     try:
 130         return self.cache_sig_vars[idx]
 131     except KeyError:
 132         pass
 133
 134     m = Utils.md5()
 135     m.update(''.join([str(env[a]) for a in vars_lst]))
 136
 137     ret = self.cache_sig_vars[idx] = m.digest()
 138     return ret
 139 Build.BuildContext.hash_env_vars = hash_env_vars
 140
 141
 142 def store_fast(self, filename):
 143     file = open(filename, 'wb')
 144     data = self.get_merged_dict()
 145     try:
 146         Build.cPickle.dump(data, file, -1)
 147     finally:
 148         file.close()
 149 Environment.Environment.store_fast = store_fast
 150
 151 def load_fast(self, filename):
 152     file = open(filename, 'rb')
 153     try:
 154         data = Build.cPickle.load(file)
 155     finally:
 156         file.close()
 157     self.table.update(data)
 158 Environment.Environment.load_fast = load_fast
 159
 160 def is_this_a_static_lib(self, name):
 161     try:
 162         cache = self.cache_is_this_a_static_lib
 163     except AttributeError:
 164         cache = self.cache_is_this_a_static_lib = {}
 165     try:
 166         return cache[name]
 167     except KeyError:
 168         ret = cache[name] = 'cstaticlib' in self.bld.name_to_obj(name, self.env).features
 169         return ret
 170 TaskGen.task_gen.is_this_a_static_lib = is_this_a_static_lib
 171
 172 def shared_ancestors(self):
 173     try:
 174         cache = self.cache_is_this_a_static_lib
 175     except AttributeError:
 176         cache = self.cache_is_this_a_static_lib = {}
 177     try:
 178         return cache[id(self)]
 179     except KeyError:
 180
 181         ret = []
 182         if 'cshlib' in self.features: # or 'cprogram' in self.features:
 183             if getattr(self, 'uselib_local', None):
 184                 lst = self.to_list(self.uselib_local)
 185                 ret = [x for x in lst if not self.is_this_a_static_lib(x)]
 186         cache[id(self)] = ret
 187         return ret
 188 TaskGen.task_gen.shared_ancestors = shared_ancestors
 189
 190 @feature('cc', 'cxx')
 191 @after('apply_link', 'init_cc', 'init_cxx', 'apply_core')
 192 def apply_lib_vars(self):
 193     """after apply_link because of 'link_task'
 194     after default_cc because of the attribute 'uselib'"""
 195
 196     # after 'apply_core' in case if 'cc' if there is no link
 197
 198     env = self.env
 199     app = env.append_value
 200     seen_libpaths = set([])
 201
 202     # OPTIMIZATION 1: skip uselib variables already added (700ms)
 203     seen_uselib = set([])
 204
 205     # 1. the case of the libs defined in the project (visit ancestors first)
 206     # the ancestors external libraries (uselib) will be prepended
 207     self.uselib = self.to_list(self.uselib)
 208     names = self.to_list(self.uselib_local)
 209
 210     seen = set([])
 211     tmp = Utils.deque(names) # consume a copy of the list of names
 212     while tmp:
 213         lib_name = tmp.popleft()
 214         # visit dependencies only once
 215         if lib_name in seen:
 216             continue
 217
 218         y = self.name_to_obj(lib_name)
 219         if not y:
 220             raise Utils.WafError('object %r was not found in uselib_local (required by %r)' % (lib_name, self.name))
 221         y.post()
 222         seen.add(lib_name)
 223
 224         # OPTIMIZATION 2: pre-compute ancestors shared libraries (100ms)
 225         tmp.extend(y.shared_ancestors())
 226
 227         # link task and flags
 228         if getattr(y, 'link_task', None):
 229
 230             link_name = y.target[y.target.rfind('/') + 1:]
 231             if 'cstaticlib' in y.features:
 232                 app('STATICLIB', link_name)
 233             elif 'cshlib' in y.features or 'cprogram' in y.features:
 234                 # WARNING some linkers can link against programs
 235                 app('LIB', link_name)
 236
 237             # the order
 238             self.link_task.set_run_after(y.link_task)
 239
 240             # for the recompilation
 241             dep_nodes = getattr(self.link_task, 'dep_nodes', [])
 242             self.link_task.dep_nodes = dep_nodes + y.link_task.outputs
 243
 244             # OPTIMIZATION 3: reduce the amount of function calls
 245             # add the link path too
 246             par = y.link_task.outputs[0].parent
 247             if id(par) not in seen_libpaths:
 248                 seen_libpaths.add(id(par))
 249                 tmp_path = par.bldpath(self.env)
 250                 if not tmp_path in env['LIBPATH']:
 251                     env.prepend_value('LIBPATH', tmp_path)
 252
 253
 254         # add ancestors uselib too - but only propagate those that have no staticlib
 255         for v in self.to_list(y.uselib):
 256             if v not in seen_uselib:
 257                 seen_uselib.add(v)
 258                 if not env['STATICLIB_' + v]:
 259                     if not v in self.uselib:
 260                         self.uselib.insert(0, v)
 261
 262     # 2. the case of the libs defined outside
 263     for x in self.uselib:
 264         for v in self.p_flag_vars:
 265             val = self.env[v + '_' + x]
 266             if val:
 267                 self.env.append_value(v, val)
 268
 269 @feature('cprogram', 'cshlib', 'cstaticlib')
 270 @after('apply_lib_vars')
 271 @before('apply_obj_vars')
 272 def samba_before_apply_obj_vars(self):
 273     """before apply_obj_vars for uselib, this removes the standard pathes"""
 274
 275     def is_standard_libpath(env, path):
 276         for _path in env.STANDARD_LIBPATH:
 277             if _path == os.path.normpath(path):
 278                 return True
 279         return False
 280
 281     v = self.env
 282
 283     for i in v['RPATH']:
 284         if is_standard_libpath(v, i):
 285             v['RPATH'].remove(i)
 286
 287     for i in v['LIBPATH']:
 288         if is_standard_libpath(v, i):
 289             v['LIBPATH'].remove(i)