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import hashlib
import logging
import re
logger = logging.getLogger('BitBake.SigGen')
try:
import cPickle as pickle
except ImportError:
import pickle
logger.info('Importing cPickle failed. Falling back to a very slow implementation.')
def init(d):
siggens = [obj for obj in globals().itervalues()
if type(obj) is type and issubclass(obj, SignatureGenerator)]
desired = bb.data.getVar("BB_SIGNATURE_HANDLER", d, True) or "noop"
for sg in siggens:
if desired == sg.name:
return sg(d)
break
else:
logger.error("Invalid signature generator '%s', using default 'noop'\n"
"Available generators: %s",
', '.join(obj.name for obj in siggens))
return SignatureGenerator(d)
class SignatureGenerator(object):
"""
"""
name = "noop"
def __init__(self, data):
return
def finalise(self, fn, d, varient):
return
def get_taskhash(self, fn, task, deps, dataCache):
return 0
def set_taskdata(self, hashes, deps):
return
def stampfile(self, stampbase, taskname, taskhash):
return "%s.%s" % (stampbase, taskname)
class SignatureGeneratorBasic(SignatureGenerator):
"""
"""
name = "basic"
def __init__(self, data):
self.basehash = {}
self.taskhash = {}
self.taskdeps = {}
self.runtaskdeps = {}
self.gendeps = {}
self.lookupcache = {}
self.basewhitelist = (data.getVar("BB_HASHBASE_WHITELIST", True) or "").split()
self.taskwhitelist = data.getVar("BB_HASHTASK_WHITELIST", True) or None
if self.taskwhitelist:
self.twl = re.compile(self.taskwhitelist)
else:
self.twl = None
def _build_data(self, fn, d):
taskdeps, gendeps = bb.data.generate_dependencies(d)
basehash = {}
lookupcache = {}
for task in taskdeps:
data = d.getVar(task, False)
lookupcache[task] = data
for dep in sorted(taskdeps[task]):
if dep in self.basewhitelist:
continue
if dep in lookupcache:
var = lookupcache[dep]
else:
var = d.getVar(dep, False)
lookupcache[dep] = var
if var:
data = data + var
if data is None:
bb.error("Task %s from %s seems to be empty?!" % (task, fn))
self.basehash[fn + "." + task] = hashlib.md5(data).hexdigest()
self.taskdeps[fn] = taskdeps
self.gendeps[fn] = gendeps
self.lookupcache[fn] = lookupcache
return taskdeps
def finalise(self, fn, d, variant):
if variant:
fn = "virtual:" + variant + ":" + fn
taskdeps = self._build_data(fn, d)
#Slow but can be useful for debugging mismatched basehashes
#for task in self.taskdeps[fn]:
# self.dump_sigtask(fn, task, d.getVar("STAMP", True), False)
for task in taskdeps:
d.setVar("BB_BASEHASH_task-%s" % task, self.basehash[fn + "." + task])
def get_taskhash(self, fn, task, deps, dataCache):
k = fn + "." + task
data = dataCache.basetaskhash[k]
self.runtaskdeps[k] = []
for dep in sorted(deps):
# We only manipulate the dependencies for packages not in the whitelist
if self.twl and not self.twl.search(dataCache.pkg_fn[fn]):
# then process the actual dependencies
dep_fn = re.search("(?P<fn>.*)\..*", dep).group('fn')
if self.twl.search(dataCache.pkg_fn[dep_fn]):
continue
if dep not in self.taskhash:
bb.fatal("%s is not in taskhash, caller isn't calling in dependency order?", dep)
data = data + self.taskhash[dep]
self.runtaskdeps[k].append(dep)
h = hashlib.md5(data).hexdigest()
self.taskhash[k] = h
#d.setVar("BB_TASKHASH_task-%s" % task, taskhash[task])
return h
def set_taskdata(self, hashes, deps):
self.runtaskdeps = deps
self.taskhash = hashes
def dump_sigtask(self, fn, task, stampbase, runtime):
k = fn + "." + task
if runtime == "customfile":
sigfile = stampbase
elif runtime:
sigfile = stampbase + "." + task + ".sigdata" + "." + self.taskhash[k]
else:
sigfile = stampbase + "." + task + ".sigbasedata" + "." + self.basehash[k]
bb.utils.mkdirhier(os.path.dirname(sigfile))
data = {}
data['basewhitelist'] = self.basewhitelist
data['taskwhitelist'] = self.taskwhitelist
data['taskdeps'] = self.taskdeps[fn][task]
data['basehash'] = self.basehash[k]
data['gendeps'] = {}
data['varvals'] = {}
data['varvals'][task] = self.lookupcache[fn][task]
for dep in self.taskdeps[fn][task]:
if dep in self.basewhitelist:
continue
data['gendeps'][dep] = self.gendeps[fn][dep]
data['varvals'][dep] = self.lookupcache[fn][dep]
if runtime:
data['runtaskdeps'] = self.runtaskdeps[k]
data['runtaskhashes'] = {}
for dep in data['runtaskdeps']:
data['runtaskhashes'][dep] = self.taskhash[dep]
p = pickle.Pickler(file(sigfile, "wb"), -1)
p.dump(data)
def dump_sigs(self, dataCache):
for fn in self.taskdeps:
for task in self.taskdeps[fn]:
k = fn + "." + task
if k not in self.taskhash:
continue
if dataCache.basetaskhash[k] != self.basehash[k]:
bb.error("Bitbake's cached basehash does not match the one we just generated (%s)!" % k)
bb.error("The mismatched hashes were %s and %s" % (dataCache.basetaskhash[k], self.basehash[k]))
self.dump_sigtask(fn, task, dataCache.stamp[fn], True)
def dump_this_task(outfile, d):
fn = d.getVar("BB_FILENAME", True)
task = "do_" + d.getVar("BB_CURRENTTASK", True)
bb.parse.siggen.dump_sigtask(fn, task, outfile, "customfile")
def compare_sigfiles(a, b):
p1 = pickle.Unpickler(file(a, "rb"))
a_data = p1.load()
p2 = pickle.Unpickler(file(b, "rb"))
b_data = p2.load()
def dict_diff(a, b):
sa = set(a.keys())
sb = set(b.keys())
common = sa & sb
changed = set()
for i in common:
if a[i] != b[i]:
changed.add(i)
added = sa - sb
removed = sb - sa
return changed, added, removed
if 'basewhitelist' in a_data and a_data['basewhitelist'] != b_data['basewhitelist']:
print "basewhitelist changed from %s to %s" % (a_data['basewhitelist'], b_data['basewhitelist'])
if 'taskwhitelist' in a_data and a_data['taskwhitelist'] != b_data['taskwhitelist']:
print "taskwhitelist changed from %s to %s" % (a_data['taskwhitelist'], b_data['taskwhitelist'])
if a_data['taskdeps'] != b_data['taskdeps']:
print "Task dependencies changed from %s to %s" % (sorted(a_data['taskdeps']), sorted(b_data['taskdeps']))
if a_data['basehash'] != b_data['basehash']:
print "basehash changed from %s to %s" % (a_data['basehash'], b_data['basehash'])
changed, added, removed = dict_diff(a_data['gendeps'], b_data['gendeps'])
if changed:
for dep in changed:
print "List of dependencies for variable %s changed from %s to %s" % (dep, a_data['gendeps'][dep], b_data['gendeps'][dep])
if added:
for dep in added:
print "Dependency on variable %s was added" % (dep)
if removed:
for dep in removed:
print "Dependency on Variable %s was removed" % (dep)
changed, added, removed = dict_diff(a_data['varvals'], b_data['varvals'])
if changed:
for dep in changed:
print "Variable %s value changed from %s to %s" % (dep, a_data['varvals'][dep], b_data['varvals'][dep])
if 'runtaskdeps' in a_data and 'runtaskdeps' in b_data and sorted(a_data['runtaskdeps']) != sorted(b_data['runtaskdeps']):
print "Tasks this task depends on changed from %s to %s" % (sorted(a_data['runtaskdeps']), sorted(b_data['runtaskdeps']))
if 'runtaskhashes' in a_data:
for dep in a_data['runtaskhashes']:
if a_data['runtaskhashes'][dep] != b_data['runtaskhashes'][dep]:
print "Hash for dependent task %s changed from %s to %s" % (dep, a_data['runtaskhashes'][dep], b_data['runtaskhashes'][dep])
def dump_sigfile(a):
p1 = pickle.Unpickler(file(a, "rb"))
a_data = p1.load()
print "basewhitelist: %s" % (a_data['basewhitelist'])
print "taskwhitelist: %s" % (a_data['taskwhitelist'])
print "Task dependencies: %s" % (sorted(a_data['taskdeps']))
print "basehash: %s" % (a_data['basehash'])
for dep in a_data['gendeps']:
print "List of dependencies for variable %s is %s" % (dep, a_data['gendeps'][dep])
for dep in a_data['varvals']:
print "Variable %s value is %s" % (dep, a_data['varvals'][dep])
if 'runtaskdeps' in a_data:
print "Tasks this task depends on: %s" % (a_data['runtaskdeps'])
if 'runtaskhashes' in a_data:
for dep in a_data['runtaskhashes']:
print "Hash for dependent task %s is %s" % (dep, a_data['runtaskhashes'][dep])
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