# # BitBake Cache implementation # # Caching of bitbake variables before task execution # Copyright (C) 2006 Richard Purdie # Copyright (C) 2012 Intel Corporation # but small sections based on code from bin/bitbake: # Copyright (C) 2003, 2004 Chris Larson # Copyright (C) 2003, 2004 Phil Blundell # Copyright (C) 2003 - 2005 Michael 'Mickey' Lauer # Copyright (C) 2005 Holger Hans Peter Freyther # Copyright (C) 2005 ROAD GmbH # # SPDX-License-Identifier: GPL-2.0-only # import os import logging import pickle from collections import defaultdict from collections.abc import Mapping import bb.utils from bb import PrefixLoggerAdapter import re import shutil logger = logging.getLogger("BitBake.Cache") __cache_version__ = "155" def getCacheFile(path, filename, mc, data_hash): mcspec = '' if mc: mcspec = ".%s" % mc return os.path.join(path, filename + mcspec + "." + data_hash) # RecipeInfoCommon defines common data retrieving methods # from meta data for caches. CoreRecipeInfo as well as other # Extra RecipeInfo needs to inherit this class class RecipeInfoCommon(object): @classmethod def listvar(cls, var, metadata): return cls.getvar(var, metadata).split() @classmethod def intvar(cls, var, metadata): return int(cls.getvar(var, metadata) or 0) @classmethod def depvar(cls, var, metadata): return bb.utils.explode_deps(cls.getvar(var, metadata)) @classmethod def pkgvar(cls, var, packages, metadata): return dict((pkg, cls.depvar("%s:%s" % (var, pkg), metadata)) for pkg in packages) @classmethod def taskvar(cls, var, tasks, metadata): return dict((task, cls.getvar("%s:task-%s" % (var, task), metadata)) for task in tasks) @classmethod def flaglist(cls, flag, varlist, metadata, squash=False): out_dict = dict((var, metadata.getVarFlag(var, flag)) for var in varlist) if squash: return dict((k,v) for (k,v) in out_dict.items() if v) else: return out_dict @classmethod def getvar(cls, var, metadata, expand = True): return metadata.getVar(var, expand) or '' class CoreRecipeInfo(RecipeInfoCommon): __slots__ = () cachefile = "bb_cache.dat" def __init__(self, filename, metadata): self.file_depends = metadata.getVar('__depends', False) self.timestamp = bb.parse.cached_mtime(filename) self.variants = self.listvar('__VARIANTS', metadata) + [''] self.appends = self.listvar('__BBAPPEND', metadata) self.nocache = self.getvar('BB_DONT_CACHE', metadata) self.provides = self.depvar('PROVIDES', metadata) self.rprovides = self.depvar('RPROVIDES', metadata) self.pn = self.getvar('PN', metadata) or bb.parse.vars_from_file(filename,metadata)[0] self.packages = self.listvar('PACKAGES', metadata) if not self.packages: self.packages.append(self.pn) self.packages_dynamic = self.listvar('PACKAGES_DYNAMIC', metadata) self.rprovides_pkg = self.pkgvar('RPROVIDES', self.packages, metadata) self.skipreason = self.getvar('__SKIPPED', metadata) if self.skipreason: self.skipped = True return self.tasks = metadata.getVar('__BBTASKS', False) self.basetaskhashes = metadata.getVar('__siggen_basehashes', False) or {} self.hashfilename = self.getvar('BB_HASHFILENAME', metadata) self.task_deps = metadata.getVar('_task_deps', False) or {'tasks': [], 'parents': {}} self.skipped = False self.pe = self.getvar('PE', metadata) self.pv = self.getvar('PV', metadata) self.pr = self.getvar('PR', metadata) self.defaultpref = self.intvar('DEFAULT_PREFERENCE', metadata) self.not_world = self.getvar('EXCLUDE_FROM_WORLD', metadata) self.stamp = self.getvar('STAMP', metadata) self.stampclean = self.getvar('STAMPCLEAN', metadata) self.stamp_extrainfo = self.flaglist('stamp-extra-info', self.tasks, metadata) self.file_checksums = self.flaglist('file-checksums', self.tasks, metadata, True) self.depends = self.depvar('DEPENDS', metadata) self.rdepends = self.depvar('RDEPENDS', metadata) self.rrecommends = self.depvar('RRECOMMENDS', metadata) self.rdepends_pkg = self.pkgvar('RDEPENDS', self.packages, metadata) self.rrecommends_pkg = self.pkgvar('RRECOMMENDS', self.packages, metadata) self.inherits = self.getvar('__inherit_cache', metadata, expand=False) self.fakerootenv = self.getvar('FAKEROOTENV', metadata) self.fakerootdirs = self.getvar('FAKEROOTDIRS', metadata) self.fakerootlogs = self.getvar('FAKEROOTLOGS', metadata) self.fakerootnoenv = self.getvar('FAKEROOTNOENV', metadata) self.extradepsfunc = self.getvar('calculate_extra_depends', metadata) @classmethod def init_cacheData(cls, cachedata): # CacheData in Core RecipeInfo Class cachedata.task_deps = {} cachedata.pkg_fn = {} cachedata.pkg_pn = defaultdict(list) cachedata.pkg_pepvpr = {} cachedata.pkg_dp = {} cachedata.stamp = {} cachedata.stampclean = {} cachedata.stamp_extrainfo = {} cachedata.file_checksums = {} cachedata.fn_provides = {} cachedata.pn_provides = defaultdict(list) cachedata.all_depends = [] cachedata.deps = defaultdict(list) cachedata.packages = defaultdict(list) cachedata.providers = defaultdict(list) cachedata.rproviders = defaultdict(list) cachedata.packages_dynamic = defaultdict(list) cachedata.rundeps = defaultdict(lambda: defaultdict(list)) cachedata.runrecs = defaultdict(lambda: defaultdict(list)) cachedata.possible_world = [] cachedata.universe_target = [] cachedata.hashfn = {} cachedata.basetaskhash = {} cachedata.inherits = {} cachedata.fakerootenv = {} cachedata.fakerootnoenv = {} cachedata.fakerootdirs = {} cachedata.fakerootlogs = {} cachedata.extradepsfunc = {} def add_cacheData(self, cachedata, fn): cachedata.task_deps[fn] = self.task_deps cachedata.pkg_fn[fn] = self.pn cachedata.pkg_pn[self.pn].append(fn) cachedata.pkg_pepvpr[fn] = (self.pe, self.pv, self.pr) cachedata.pkg_dp[fn] = self.defaultpref cachedata.stamp[fn] = self.stamp cachedata.stampclean[fn] = self.stampclean cachedata.stamp_extrainfo[fn] = self.stamp_extrainfo cachedata.file_checksums[fn] = self.file_checksums provides = [self.pn] for provide in self.provides: if provide not in provides: provides.append(provide) cachedata.fn_provides[fn] = provides for provide in provides: cachedata.providers[provide].append(fn) if provide not in cachedata.pn_provides[self.pn]: cachedata.pn_provides[self.pn].append(provide) for dep in self.depends: if dep not in cachedata.deps[fn]: cachedata.deps[fn].append(dep) if dep not in cachedata.all_depends: cachedata.all_depends.append(dep) rprovides = self.rprovides for package in self.packages: cachedata.packages[package].append(fn) rprovides += self.rprovides_pkg[package] for rprovide in rprovides: if fn not in cachedata.rproviders[rprovide]: cachedata.rproviders[rprovide].append(fn) for package in self.packages_dynamic: cachedata.packages_dynamic[package].append(fn) # Build hash of runtime depends and recommends for package in self.packages: cachedata.rundeps[fn][package] = list(self.rdepends) + self.rdepends_pkg[package] cachedata.runrecs[fn][package] = list(self.rrecommends) + self.rrecommends_pkg[package] # Collect files we may need for possible world-dep # calculations if not bb.utils.to_boolean(self.not_world): cachedata.possible_world.append(fn) #else: # logger.debug2("EXCLUDE FROM WORLD: %s", fn) # create a collection of all targets for sanity checking # tasks, such as upstream versions, license, and tools for # task and image creation. cachedata.universe_target.append(self.pn) cachedata.hashfn[fn] = self.hashfilename for task, taskhash in self.basetaskhashes.items(): identifier = '%s:%s' % (fn, task) cachedata.basetaskhash[identifier] = taskhash cachedata.inherits[fn] = self.inherits cachedata.fakerootenv[fn] = self.fakerootenv cachedata.fakerootnoenv[fn] = self.fakerootnoenv cachedata.fakerootdirs[fn] = self.fakerootdirs cachedata.fakerootlogs[fn] = self.fakerootlogs cachedata.extradepsfunc[fn] = self.extradepsfunc class SiggenRecipeInfo(RecipeInfoCommon): __slots__ = () classname = "SiggenRecipeInfo" cachefile = "bb_cache_" + classname +".dat" # we don't want to show this information in graph files so don't set cachefields #cachefields = [] def __init__(self, filename, metadata): self.siggen_gendeps = metadata.getVar("__siggen_gendeps", False) self.siggen_varvals = metadata.getVar("__siggen_varvals", False) self.siggen_taskdeps = metadata.getVar("__siggen_taskdeps", False) @classmethod def init_cacheData(cls, cachedata): cachedata.siggen_taskdeps = {} cachedata.siggen_gendeps = {} cachedata.siggen_varvals = {} def add_cacheData(self, cachedata, fn): cachedata.siggen_gendeps[fn] = self.siggen_gendeps cachedata.siggen_varvals[fn] = self.siggen_varvals cachedata.siggen_taskdeps[fn] = self.siggen_taskdeps # The siggen variable data is large and impacts: # - bitbake's overall memory usage # - the amount of data sent over IPC between parsing processes and the server # - the size of the cache files on disk # - the size of "sigdata" hash information files on disk # The data consists of strings (some large) or frozenset lists of variables # As such, we a) deplicate the data here and b) pass references to the object at second # access (e.g. over IPC or saving into pickle). store = {} save_map = {} save_count = 1 restore_map = {} restore_count = {} @classmethod def reset(cls): # Needs to be called before starting new streamed data in a given process # (e.g. writing out the cache again) cls.save_map = {} cls.save_count = 1 cls.restore_map = {} @classmethod def _save(cls, deps): ret = [] if not deps: return deps for dep in deps: fs = deps[dep] if fs is None: ret.append((dep, None, None)) elif fs in cls.save_map: ret.append((dep, None, cls.save_map[fs])) else: cls.save_map[fs] = cls.save_count ret.append((dep, fs, cls.save_count)) cls.save_count = cls.save_count + 1 return ret @classmethod def _restore(cls, deps, pid): ret = {} if not deps: return deps if pid not in cls.restore_map: cls.restore_map[pid] = {} map = cls.restore_map[pid] for dep, fs, mapnum in deps: if fs is None and mapnum is None: ret[dep] = None elif fs is None: ret[dep] = map[mapnum] else: try: fs = cls.store[fs] except KeyError: cls.store[fs] = fs map[mapnum] = fs ret[dep] = fs return ret def __getstate__(self): ret = {} for key in ["siggen_gendeps", "siggen_taskdeps", "siggen_varvals"]: ret[key] = self._save(self.__dict__[key]) ret['pid'] = os.getpid() return ret def __setstate__(self, state): pid = state['pid'] for key in ["siggen_gendeps", "siggen_taskdeps", "siggen_varvals"]: setattr(self, key, self._restore(state[key], pid)) def virtualfn2realfn(virtualfn): """ Convert a virtual file name to a real one + the associated subclass keyword """ mc = "" if virtualfn.startswith('mc:') and virtualfn.count(':') >= 2: (_, mc, virtualfn) = virtualfn.split(':', 2) fn = virtualfn cls = "" if virtualfn.startswith('virtual:'): elems = virtualfn.split(':') cls = ":".join(elems[1:-1]) fn = elems[-1] return (fn, cls, mc) def realfn2virtual(realfn, cls, mc): """ Convert a real filename + the associated subclass keyword to a virtual filename """ if cls: realfn = "virtual:" + cls + ":" + realfn if mc: realfn = "mc:" + mc + ":" + realfn return realfn def variant2virtual(realfn, variant): """ Convert a real filename + a variant to a virtual filename """ if variant == "": return realfn if variant.startswith("mc:") and variant.count(':') >= 2: elems = variant.split(":") if elems[2]: return "mc:" + elems[1] + ":virtual:" + ":".join(elems[2:]) + ":" + realfn return "mc:" + elems[1] + ":" + realfn return "virtual:" + variant + ":" + realfn # # Cooker calls cacheValid on its recipe list, then either calls loadCached # from it's main thread or parse from separate processes to generate an up to # date cache # class Cache(object): """ BitBake Cache implementation """ def __init__(self, databuilder, mc, data_hash, caches_array): self.databuilder = databuilder self.data = databuilder.data # Pass caches_array information into Cache Constructor # It will be used later for deciding whether we # need extra cache file dump/load support self.mc = mc self.logger = PrefixLoggerAdapter("Cache: %s: " % (mc if mc else "default"), logger) self.caches_array = caches_array self.cachedir = self.data.getVar("CACHE") self.clean = set() self.checked = set() self.depends_cache = {} self.data_fn = None self.cacheclean = True self.data_hash = data_hash self.filelist_regex = re.compile(r'(?:(?<=:True)|(?<=:False))\s+') if self.cachedir in [None, '']: bb.fatal("Please ensure CACHE is set to the cache directory for BitBake to use") def getCacheFile(self, cachefile): return getCacheFile(self.cachedir, cachefile, self.mc, self.data_hash) def prepare_cache(self, progress): loaded = 0 self.cachefile = self.getCacheFile("bb_cache.dat") self.logger.debug("Cache dir: %s", self.cachedir) bb.utils.mkdirhier(self.cachedir) cache_ok = True if self.caches_array: for cache_class in self.caches_array: cachefile = self.getCacheFile(cache_class.cachefile) cache_exists = os.path.exists(cachefile) self.logger.debug2("Checking if %s exists: %r", cachefile, cache_exists) cache_ok = cache_ok and cache_exists cache_class.init_cacheData(self) if cache_ok: loaded = self.load_cachefile(progress) elif os.path.isfile(self.cachefile): self.logger.info("Out of date cache found, rebuilding...") else: self.logger.debug("Cache file %s not found, building..." % self.cachefile) # We don't use the symlink, its just for debugging convinience if self.mc: symlink = os.path.join(self.cachedir, "bb_cache.dat.%s" % self.mc) else: symlink = os.path.join(self.cachedir, "bb_cache.dat") if os.path.exists(symlink): bb.utils.remove(symlink) try: os.symlink(os.path.basename(self.cachefile), symlink) except OSError: pass return loaded def cachesize(self): cachesize = 0 for cache_class in self.caches_array: cachefile = self.getCacheFile(cache_class.cachefile) try: with open(cachefile, "rb") as cachefile: cachesize += os.fstat(cachefile.fileno()).st_size except FileNotFoundError: pass return cachesize def load_cachefile(self, progress): previous_progress = 0 for cache_class in self.caches_array: cachefile = self.getCacheFile(cache_class.cachefile) self.logger.debug('Loading cache file: %s' % cachefile) with open(cachefile, "rb") as cachefile: pickled = pickle.Unpickler(cachefile) # Check cache version information try: cache_ver = pickled.load() bitbake_ver = pickled.load() except Exception: self.logger.info('Invalid cache, rebuilding...') return 0 if cache_ver != __cache_version__: self.logger.info('Cache version mismatch, rebuilding...') return 0 elif bitbake_ver != bb.__version__: self.logger.info('Bitbake version mismatch, rebuilding...') return 0 # Load the rest of the cache file current_progress = 0 while cachefile: try: key = pickled.load() value = pickled.load() except Exception: break if not isinstance(key, str): bb.warn("%s from extras cache is not a string?" % key) break if not isinstance(value, RecipeInfoCommon): bb.warn("%s from extras cache is not a RecipeInfoCommon class?" % value) break if key in self.depends_cache: self.depends_cache[key].append(value) else: self.depends_cache[key] = [value] # only fire events on even percentage boundaries current_progress = cachefile.tell() + previous_progress progress(cachefile.tell() + previous_progress) previous_progress += current_progress return len(self.depends_cache) def parse(self, filename, appends, layername): """Parse the specified filename, returning the recipe information""" self.logger.debug("Parsing %s", filename) infos = [] datastores = self.databuilder.parseRecipeVariants(filename, appends, mc=self.mc, layername=layername) depends = [] variants = [] # Process the "real" fn last so we can store variants list for variant, data in sorted(datastores.items(), key=lambda i: i[0], reverse=True): virtualfn = variant2virtual(filename, variant) variants.append(variant) depends = depends + (data.getVar("__depends", False) or []) if depends and not variant: data.setVar("__depends", depends) if virtualfn == filename: data.setVar("__VARIANTS", " ".join(variants)) info_array = [] for cache_class in self.caches_array: info = cache_class(filename, data) info_array.append(info) infos.append((virtualfn, info_array)) return infos def loadCached(self, filename, appends): """Obtain the recipe information for the specified filename, using cached values. """ infos = [] # info_array item is a list of [CoreRecipeInfo, XXXRecipeInfo] info_array = self.depends_cache[filename] for variant in info_array[0].variants: virtualfn = variant2virtual(filename, variant) infos.append((virtualfn, self.depends_cache[virtualfn])) return infos def cacheValid(self, fn, appends): """ Is the cache valid for fn? Fast version, no timestamps checked. """ if fn not in self.checked: self.cacheValidUpdate(fn, appends) if fn in self.clean: return True return False def cacheValidUpdate(self, fn, appends): """ Is the cache valid for fn? Make thorough (slower) checks including timestamps. """ self.checked.add(fn) # File isn't in depends_cache if not fn in self.depends_cache: self.logger.debug2("%s is not cached", fn) return False mtime = bb.parse.cached_mtime_noerror(fn) # Check file still exists if mtime == 0: self.logger.debug2("%s no longer exists", fn) self.remove(fn) return False info_array = self.depends_cache[fn] # Check the file's timestamp if mtime != info_array[0].timestamp: self.logger.debug2("%s changed", fn) self.remove(fn) return False # Check dependencies are still valid depends = info_array[0].file_depends if depends: for f, old_mtime in depends: fmtime = bb.parse.cached_mtime_noerror(f) # Check if file still exists if old_mtime != 0 and fmtime == 0: self.logger.debug2("%s's dependency %s was removed", fn, f) self.remove(fn) return False if (fmtime != old_mtime): self.logger.debug2("%s's dependency %s changed", fn, f) self.remove(fn) return False if hasattr(info_array[0], 'file_checksums'): for _, fl in info_array[0].file_checksums.items(): fl = fl.strip() if not fl: continue # Have to be careful about spaces and colons in filenames flist = self.filelist_regex.split(fl) for f in flist: if not f: continue f, exist = f.rsplit(":", 1) if (exist == "True" and not os.path.exists(f)) or (exist == "False" and os.path.exists(f)): self.logger.debug2("%s's file checksum list file %s changed", fn, f) self.remove(fn) return False if tuple(appends) != tuple(info_array[0].appends): self.logger.debug2("appends for %s changed", fn) self.logger.debug2("%s to %s" % (str(appends), str(info_array[0].appends))) self.remove(fn) return False invalid = False for cls in info_array[0].variants: virtualfn = variant2virtual(fn, cls) self.clean.add(virtualfn) if virtualfn not in self.depends_cache: self.logger.debug2("%s is not cached", virtualfn) invalid = True elif len(self.depends_cache[virtualfn]) != len(self.caches_array): self.logger.debug2("Extra caches missing for %s?" % virtualfn) invalid = True # If any one of the variants is not present, mark as invalid for all if invalid: for cls in info_array[0].variants: virtualfn = variant2virtual(fn, cls) if virtualfn in self.clean: self.logger.debug2("Removing %s from cache", virtualfn) self.clean.remove(virtualfn) if fn in self.clean: self.logger.debug2("Marking %s as not clean", fn) self.clean.remove(fn) return False self.clean.add(fn) return True def remove(self, fn): """ Remove a fn from the cache Called from the parser in error cases """ if fn in self.depends_cache: self.logger.debug("Removing %s from cache", fn) del self.depends_cache[fn] if fn in self.clean: self.logger.debug("Marking %s as unclean", fn) self.clean.remove(fn) def sync(self): """ Save the cache Called from the parser when complete (or exiting) """ if self.cacheclean: self.logger.debug2("Cache is clean, not saving.") return for cache_class in self.caches_array: cache_class_name = cache_class.__name__ cachefile = self.getCacheFile(cache_class.cachefile) self.logger.debug2("Writing %s", cachefile) with open(cachefile, "wb") as f: p = pickle.Pickler(f, pickle.HIGHEST_PROTOCOL) p.dump(__cache_version__) p.dump(bb.__version__) for key, info_array in self.depends_cache.items(): for info in info_array: if isinstance(info, RecipeInfoCommon) and info.__class__.__name__ == cache_class_name: p.dump(key) p.dump(info) del self.depends_cache SiggenRecipeInfo.reset() @staticmethod def mtime(cachefile): return bb.parse.cached_mtime_noerror(cachefile) def add_info(self, filename, info_array, cacheData, parsed=None, watcher=None): if self.mc is not None: (fn, cls, mc) = virtualfn2realfn(filename) if mc: self.logger.error("Unexpected multiconfig %s", filename) return vfn = realfn2virtual(fn, cls, self.mc) else: vfn = filename if isinstance(info_array[0], CoreRecipeInfo) and (not info_array[0].skipped): cacheData.add_from_recipeinfo(vfn, info_array) if watcher: watcher(info_array[0].file_depends) if (info_array[0].skipped or 'SRCREVINACTION' not in info_array[0].pv) and not info_array[0].nocache: if parsed: self.cacheclean = False self.depends_cache[filename] = info_array class MulticonfigCache(Mapping): def __init__(self, databuilder, data_hash, caches_array): def progress(p): nonlocal current_progress nonlocal previous_progress nonlocal previous_percent nonlocal cachesize current_progress = previous_progress + p if current_progress > cachesize: # we might have calculated incorrect total size because a file # might've been written out just after we checked its size cachesize = current_progress current_percent = 100 * current_progress / cachesize if current_percent > previous_percent: previous_percent = current_percent bb.event.fire(bb.event.CacheLoadProgress(current_progress, cachesize), databuilder.data) cachesize = 0 current_progress = 0 previous_progress = 0 previous_percent = 0 self.__caches = {} for mc, mcdata in databuilder.mcdata.items(): self.__caches[mc] = Cache(databuilder, mc, data_hash, caches_array) cachesize += self.__caches[mc].cachesize() bb.event.fire(bb.event.CacheLoadStarted(cachesize), databuilder.data) loaded = 0 for c in self.__caches.values(): SiggenRecipeInfo.reset() loaded += c.prepare_cache(progress) previous_progress = current_progress # Note: depends cache number is corresponding to the parsing file numbers. # The same file has several caches, still regarded as one item in the cache bb.event.fire(bb.event.CacheLoadCompleted(cachesize, loaded), databuilder.data) def __len__(self): return len(self.__caches) def __getitem__(self, key): return self.__caches[key] def __contains__(self, key): return key in self.__caches def __iter__(self): for k in self.__caches: yield k def init(cooker): """ The Objective: Cache the minimum amount of data possible yet get to the stage of building packages (i.e. tryBuild) without reparsing any .bb files. To do this, we intercept getVar calls and only cache the variables we see being accessed. We rely on the cache getVar calls being made for all variables bitbake might need to use to reach this stage. For each cached file we need to track: * Its mtime * The mtimes of all its dependencies * Whether it caused a parse.SkipRecipe exception Files causing parsing errors are evicted from the cache. """ return Cache(cooker.configuration.data, cooker.configuration.data_hash) class CacheData(object): """ The data structures we compile from the cached data """ def __init__(self, caches_array): self.caches_array = caches_array for cache_class in self.caches_array: if not issubclass(cache_class, RecipeInfoCommon): bb.error("Extra cache data class %s should subclass RecipeInfoCommon class" % cache_class) cache_class.init_cacheData(self) # Direct cache variables self.task_queues = {} self.preferred = {} self.tasks = {} # Indirect Cache variables (set elsewhere) self.ignored_dependencies = [] self.world_target = set() self.bbfile_priority = {} def add_from_recipeinfo(self, fn, info_array): for info in info_array: info.add_cacheData(self, fn) class MultiProcessCache(object): """ BitBake multi-process cache implementation Used by the codeparser & file checksum caches """ def __init__(self): self.cachefile = None self.cachedata = self.create_cachedata() self.cachedata_extras = self.create_cachedata() def init_cache(self, cachedir, cache_file_name=None): if not cachedir: return bb.utils.mkdirhier(cachedir) self.cachefile = os.path.join(cachedir, cache_file_name or self.__class__.cache_file_name) logger.debug("Using cache in '%s'", self.cachefile) glf = bb.utils.lockfile(self.cachefile + ".lock") try: with open(self.cachefile, "rb") as f: p = pickle.Unpickler(f) data, version = p.load() except: bb.utils.unlockfile(glf) return bb.utils.unlockfile(glf) if version != self.__class__.CACHE_VERSION: return self.cachedata = data def create_cachedata(self): data = [{}] return data def save_extras(self): if not self.cachefile: return have_data = any(self.cachedata_extras) if not have_data: return glf = bb.utils.lockfile(self.cachefile + ".lock", shared=True) i = os.getpid() lf = None while not lf: lf = bb.utils.lockfile(self.cachefile + ".lock." + str(i), retry=False) if not lf or os.path.exists(self.cachefile + "-" + str(i)): if lf: bb.utils.unlockfile(lf) lf = None i = i + 1 continue with open(self.cachefile + "-" + str(i), "wb") as f: p = pickle.Pickler(f, -1) p.dump([self.cachedata_extras, self.__class__.CACHE_VERSION]) bb.utils.unlockfile(lf) bb.utils.unlockfile(glf) def merge_data(self, source, dest): for j in range(0,len(dest)): for h in source[j]: if h not in dest[j]: dest[j][h] = source[j][h] def save_merge(self): if not self.cachefile: return glf = bb.utils.lockfile(self.cachefile + ".lock") data = self.cachedata have_data = False for f in [y for y in os.listdir(os.path.dirname(self.cachefile)) if y.startswith(os.path.basename(self.cachefile) + '-')]: f = os.path.join(os.path.dirname(self.cachefile), f) try: with open(f, "rb") as fd: p = pickle.Unpickler(fd) extradata, version = p.load() except (IOError, EOFError): os.unlink(f) continue if version != self.__class__.CACHE_VERSION: os.unlink(f) continue have_data = True self.merge_data(extradata, data) os.unlink(f) if have_data: with open(self.cachefile, "wb") as f: p = pickle.Pickler(f, -1) p.dump([data, self.__class__.CACHE_VERSION]) bb.utils.unlockfile(glf) class SimpleCache(object): """ BitBake multi-process cache implementation Used by the codeparser & file checksum caches """ def __init__(self, version): self.cachefile = None self.cachedata = None self.cacheversion = version def init_cache(self, d, cache_file_name=None, defaultdata=None): cachedir = (d.getVar("PERSISTENT_DIR") or d.getVar("CACHE")) if not cachedir: return defaultdata bb.utils.mkdirhier(cachedir) self.cachefile = os.path.join(cachedir, cache_file_name or self.__class__.cache_file_name) logger.debug("Using cache in '%s'", self.cachefile) glf = bb.utils.lockfile(self.cachefile + ".lock") try: with open(self.cachefile, "rb") as f: p = pickle.Unpickler(f) data, version = p.load() except: bb.utils.unlockfile(glf) return defaultdata bb.utils.unlockfile(glf) if version != self.cacheversion: return defaultdata return data def save(self, data): if not self.cachefile: return glf = bb.utils.lockfile(self.cachefile + ".lock") with open(self.cachefile, "wb") as f: p = pickle.Pickler(f, -1) p.dump([data, self.cacheversion]) bb.utils.unlockfile(glf) def copyfile(self, target): if not self.cachefile: return glf = bb.utils.lockfile(self.cachefile + ".lock") shutil.copy(self.cachefile, target) bb.utils.unlockfile(glf)