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import hashlib
import logging
import os
import re
import bb.data
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 = d.getVar("BB_SIGNATURE_HANDLER", 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, file_name, taskname, extrainfo):
return ("%s.%s.%s" % (stampbase, taskname, extrainfo)).rstrip('.')
def dump_sigtask(self, fn, task, stampbase, runtime):
return
class SignatureGeneratorBasic(SignatureGenerator):
"""
"""
name = "basic"
def __init__(self, data):
self.basehash = {}
self.taskhash = {}
self.taskdeps = {}
self.runtaskdeps = {}
self.gendeps = {}
self.lookupcache = {}
self.pkgnameextract = re.compile("(?P<fn>.*)\..*")
self.basewhitelist = set((data.getVar("BB_HASHBASE_WHITELIST", True) or "").split())
self.taskwhitelist = None
self.init_rundepcheck(data)
def init_rundepcheck(self, data):
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):
tasklist, gendeps, lookupcache = bb.data.generate_dependencies(d)
taskdeps = {}
basehash = {}
for task in tasklist:
data = d.getVar(task, False)
lookupcache[task] = data
if data is None:
bb.error("Task %s from %s seems to be empty?!" % (task, fn))
data = ''
newdeps = gendeps[task]
seen = set()
while newdeps:
nextdeps = newdeps
seen |= nextdeps
newdeps = set()
for dep in nextdeps:
if dep in self.basewhitelist:
continue
newdeps |= gendeps[dep]
newdeps -= seen
alldeps = seen - self.basewhitelist
for dep in sorted(alldeps):
data = data + dep
if dep in lookupcache:
var = lookupcache[dep]
else:
var = d.getVar(dep, False)
lookupcache[dep] = var
if var:
data = data + str(var)
self.basehash[fn + "." + task] = hashlib.md5(data).hexdigest()
taskdeps[task] = sorted(alldeps)
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
try:
taskdeps = self._build_data(fn, d)
except:
bb.note("Error during finalise of %s" % fn)
raise
#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 rundep_check(self, fn, recipename, task, dep, depname, dataCache):
# Return True if we should keep the dependency, False to drop it
# We only manipulate the dependencies for packages not in the whitelist
if self.twl and not self.twl.search(recipename):
# then process the actual dependencies
if self.twl.search(depname):
return False
return True
def get_taskhash(self, fn, task, deps, dataCache):
k = fn + "." + task
data = dataCache.basetaskhash[k]
self.runtaskdeps[k] = []
recipename = dataCache.pkg_fn[fn]
for dep in sorted(deps, key=clean_basepath):
depname = dataCache.pkg_fn[self.pkgnameextract.search(dep).group('fn')]
if not self.rundep_check(fn, recipename, task, dep, depname, dataCache):
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 and k in self.taskhash:
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 and k in self.taskhash:
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)
class SignatureGeneratorBasicHash(SignatureGeneratorBasic):
name = "basichash"
def stampfile(self, stampbase, fn, taskname, extrainfo):
if taskname != "do_setscene" and taskname.endswith("_setscene"):
k = fn + "." + taskname[:-9]
else:
k = fn + "." + taskname
if k in self.taskhash:
h = self.taskhash[k]
else:
# If k is not in basehash, then error
h = self.basehash[k]
return ("%s.%s.%s.%s" % (stampbase, taskname, h, extrainfo)).rstrip('.')
def dump_this_task(outfile, d):
import bb.parse
fn = d.getVar("BB_FILENAME", True)
task = "do_" + d.getVar("BB_CURRENTTASK", True)
bb.parse.siggen.dump_sigtask(fn, task, outfile, "customfile")
def clean_basepath(a):
if a.startswith("virtual:"):
b = a.rsplit(":", 1)[0] + a.rsplit("/", 1)[1]
else:
b = a.rsplit("/", 1)[1]
return b
def clean_basepaths(a):
b = {}
for x in a:
b[clean_basepath(x)] = a[x]
return b
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, whitelist=set()):
sa = set(a.keys())
sb = set(b.keys())
common = sa & sb
changed = set()
for i in common:
if a[i] != b[i] and i not in whitelist:
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 a_data['basewhitelist'] and b_data['basewhitelist']:
print "changed items: %s" % a_data['basewhitelist'].symmetric_difference(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['taskwhitelist'] and b_data['taskwhitelist']:
print "changed items: %s" % a_data['taskwhitelist'].symmetric_difference(b_data['taskwhitelist'])
if a_data['taskdeps'] != b_data['taskdeps']:
print "Task dependencies changed from:\n%s\nto:\n%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'], a_data['basewhitelist'] & b_data['basewhitelist'])
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 a_data['gendeps'][dep] and b_data['gendeps'][dep]:
print "changed items: %s" % a_data['gendeps'][dep].symmetric_difference(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 'runtaskhashes' in a_data and 'runtaskhashes' in b_data:
a = clean_basepaths(a_data['runtaskhashes'])
b = clean_basepaths(b_data['runtaskhashes'])
changed, added, removed = dict_diff(a, b)
if added:
for dep in added:
bdep_found = False
if removed:
for bdep in removed:
if a[dep] == b[bdep]:
#print "Dependency on task %s was replaced by %s with same hash" % (dep, bdep)
bdep_found = True
if not bdep_found:
print "Dependency on task %s was added with hash %s" % (dep, a[dep])
if removed:
for dep in removed:
adep_found = False
if added:
for adep in added:
if a[adep] == b[dep]:
#print "Dependency on task %s was replaced by %s with same hash" % (adep, dep)
adep_found = True
if not adep_found:
print "Dependency on task %s was removed with hash %s" % (dep, b[dep])
if changed:
for dep in changed:
print "Hash for dependent task %s changed from %s to %s" % (dep, a[dep], b[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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