blob: 37cc630c63e33105f0fea2934311dec0af10ae34 [file] [log] [blame]
"""
BitBake 'Event' implementation
Classes and functions for manipulating 'events' in the
BitBake build tools.
"""
# Copyright (C) 2003, 2004 Chris Larson
#
# SPDX-License-Identifier: GPL-2.0-only
#
import ast
import atexit
import collections
import logging
import pickle
import sys
import threading
import traceback
import bb.exceptions
import bb.utils
# This is the pid for which we should generate the event. This is set when
# the runqueue forks off.
worker_pid = 0
worker_fire = None
logger = logging.getLogger('BitBake.Event')
class Event(object):
"""Base class for events"""
def __init__(self):
self.pid = worker_pid
class HeartbeatEvent(Event):
"""Triggered at regular time intervals of 10 seconds. Other events can fire much more often
(runQueueTaskStarted when there are many short tasks) or not at all for long periods
of time (again runQueueTaskStarted, when there is just one long-running task), so this
event is more suitable for doing some task-independent work occasionally."""
def __init__(self, time):
Event.__init__(self)
self.time = time
Registered = 10
AlreadyRegistered = 14
def get_class_handlers():
return _handlers
def set_class_handlers(h):
global _handlers
_handlers = h
def clean_class_handlers():
return collections.OrderedDict()
# Internal
_handlers = clean_class_handlers()
_ui_handlers = {}
_ui_logfilters = {}
_ui_handler_seq = 0
_event_handler_map = {}
_catchall_handlers = {}
_eventfilter = None
_uiready = False
_thread_lock = threading.Lock()
_heartbeat_enabled = False
_should_exit = threading.Event()
def enable_threadlock():
# Always needed now
return
def disable_threadlock():
# Always needed now
return
def enable_heartbeat():
global _heartbeat_enabled
_heartbeat_enabled = True
def disable_heartbeat():
global _heartbeat_enabled
_heartbeat_enabled = False
#
# In long running code, this function should be called periodically
# to check if we should exit due to an interuption (.e.g Ctrl+C from the UI)
#
def check_for_interrupts(d):
global _should_exit
if _should_exit.is_set():
bb.warn("Exiting due to interrupt.")
raise bb.BBHandledException()
def execute_handler(name, handler, event, d):
event.data = d
try:
ret = handler(event, d)
except (bb.parse.SkipRecipe, bb.BBHandledException):
raise
except Exception:
etype, value, tb = sys.exc_info()
logger.error("Execution of event handler '%s' failed" % name,
exc_info=(etype, value, tb.tb_next))
raise
except SystemExit as exc:
if exc.code != 0:
logger.error("Execution of event handler '%s' failed" % name)
raise
finally:
del event.data
def fire_class_handlers(event, d):
if isinstance(event, logging.LogRecord):
return
eid = str(event.__class__)[8:-2]
evt_hmap = _event_handler_map.get(eid, {})
for name, handler in list(_handlers.items()):
if name in _catchall_handlers or name in evt_hmap:
if _eventfilter:
if not _eventfilter(name, handler, event, d):
continue
if d is not None and not name in (d.getVar("__BBHANDLERS_MC") or set()):
continue
execute_handler(name, handler, event, d)
ui_queue = []
@atexit.register
def print_ui_queue():
global ui_queue
"""If we're exiting before a UI has been spawned, display any queued
LogRecords to the console."""
logger = logging.getLogger("BitBake")
if not _uiready:
from bb.msg import BBLogFormatter
# Flush any existing buffered content
try:
sys.stdout.flush()
except:
pass
try:
sys.stderr.flush()
except:
pass
stdout = logging.StreamHandler(sys.stdout)
stderr = logging.StreamHandler(sys.stderr)
formatter = BBLogFormatter("%(levelname)s: %(message)s")
stdout.setFormatter(formatter)
stderr.setFormatter(formatter)
# First check to see if we have any proper messages
msgprint = False
msgerrs = False
# Should we print to stderr?
for event in ui_queue[:]:
if isinstance(event, logging.LogRecord) and event.levelno >= logging.WARNING:
msgerrs = True
break
if msgerrs:
logger.addHandler(stderr)
else:
logger.addHandler(stdout)
for event in ui_queue[:]:
if isinstance(event, logging.LogRecord):
if event.levelno > logging.DEBUG:
logger.handle(event)
msgprint = True
# Nope, so just print all of the messages we have (including debug messages)
if not msgprint:
for event in ui_queue[:]:
if isinstance(event, logging.LogRecord):
logger.handle(event)
if msgerrs:
logger.removeHandler(stderr)
else:
logger.removeHandler(stdout)
ui_queue = []
def fire_ui_handlers(event, d):
global _thread_lock
if not _uiready:
# No UI handlers registered yet, queue up the messages
ui_queue.append(event)
return
with bb.utils.lock_timeout(_thread_lock):
errors = []
for h in _ui_handlers:
#print "Sending event %s" % event
try:
if not _ui_logfilters[h].filter(event):
continue
# We use pickle here since it better handles object instances
# which xmlrpc's marshaller does not. Events *must* be serializable
# by pickle.
if hasattr(_ui_handlers[h].event, "sendpickle"):
_ui_handlers[h].event.sendpickle((pickle.dumps(event)))
else:
_ui_handlers[h].event.send(event)
except:
errors.append(h)
for h in errors:
del _ui_handlers[h]
def fire(event, d):
"""Fire off an Event"""
# We can fire class handlers in the worker process context and this is
# desired so they get the task based datastore.
# UI handlers need to be fired in the server context so we defer this. They
# don't have a datastore so the datastore context isn't a problem.
fire_class_handlers(event, d)
if worker_fire:
worker_fire(event, d)
else:
# If messages have been queued up, clear the queue
global _uiready, ui_queue
if _uiready and ui_queue:
for queue_event in ui_queue:
fire_ui_handlers(queue_event, d)
ui_queue = []
fire_ui_handlers(event, d)
def fire_from_worker(event, d):
fire_ui_handlers(event, d)
noop = lambda _: None
def register(name, handler, mask=None, filename=None, lineno=None, data=None):
"""Register an Event handler"""
if data is not None and data.getVar("BB_CURRENT_MC"):
mc = data.getVar("BB_CURRENT_MC")
name = '%s%s' % (mc.replace('-', '_'), name)
# already registered
if name in _handlers:
if data is not None:
bbhands_mc = (data.getVar("__BBHANDLERS_MC") or set())
bbhands_mc.add(name)
data.setVar("__BBHANDLERS_MC", bbhands_mc)
return AlreadyRegistered
if handler is not None:
# handle string containing python code
if isinstance(handler, str):
tmp = "def %s(e, d):\n%s" % (name, handler)
try:
code = bb.methodpool.compile_cache(tmp)
if not code:
if filename is None:
filename = "%s(e, d)" % name
code = compile(tmp, filename, "exec", ast.PyCF_ONLY_AST)
if lineno is not None:
ast.increment_lineno(code, lineno-1)
code = compile(code, filename, "exec")
bb.methodpool.compile_cache_add(tmp, code)
except SyntaxError:
logger.error("Unable to register event handler '%s':\n%s", name,
''.join(traceback.format_exc(limit=0)))
_handlers[name] = noop
return
env = {}
bb.utils.better_exec(code, env)
func = bb.utils.better_eval(name, env)
_handlers[name] = func
else:
_handlers[name] = handler
if not mask or '*' in mask:
_catchall_handlers[name] = True
else:
for m in mask:
if _event_handler_map.get(m, None) is None:
_event_handler_map[m] = {}
_event_handler_map[m][name] = True
if data is not None:
bbhands_mc = (data.getVar("__BBHANDLERS_MC") or set())
bbhands_mc.add(name)
data.setVar("__BBHANDLERS_MC", bbhands_mc)
return Registered
def remove(name, handler, data=None):
"""Remove an Event handler"""
if data is not None:
if data.getVar("BB_CURRENT_MC"):
mc = data.getVar("BB_CURRENT_MC")
name = '%s%s' % (mc.replace('-', '_'), name)
_handlers.pop(name)
if name in _catchall_handlers:
_catchall_handlers.pop(name)
for event in _event_handler_map.keys():
if name in _event_handler_map[event]:
_event_handler_map[event].pop(name)
if data is not None:
bbhands_mc = (data.getVar("__BBHANDLERS_MC") or set())
if name in bbhands_mc:
bbhands_mc.remove(name)
data.setVar("__BBHANDLERS_MC", bbhands_mc)
def get_handlers():
return _handlers
def set_handlers(handlers):
global _handlers
_handlers = handlers
def set_eventfilter(func):
global _eventfilter
_eventfilter = func
def register_UIHhandler(handler, mainui=False):
with bb.utils.lock_timeout(_thread_lock):
bb.event._ui_handler_seq = bb.event._ui_handler_seq + 1
_ui_handlers[_ui_handler_seq] = handler
level, debug_domains = bb.msg.constructLogOptions()
_ui_logfilters[_ui_handler_seq] = UIEventFilter(level, debug_domains)
if mainui:
global _uiready
_uiready = _ui_handler_seq
return _ui_handler_seq
def unregister_UIHhandler(handlerNum, mainui=False):
if mainui:
global _uiready
_uiready = False
with bb.utils.lock_timeout(_thread_lock):
if handlerNum in _ui_handlers:
del _ui_handlers[handlerNum]
return
def get_uihandler():
if _uiready is False:
return None
return _uiready
# Class to allow filtering of events and specific filtering of LogRecords *before* we put them over the IPC
class UIEventFilter(object):
def __init__(self, level, debug_domains):
self.update(None, level, debug_domains)
def update(self, eventmask, level, debug_domains):
self.eventmask = eventmask
self.stdlevel = level
self.debug_domains = debug_domains
def filter(self, event):
if isinstance(event, logging.LogRecord):
if event.levelno >= self.stdlevel:
return True
if event.name in self.debug_domains and event.levelno >= self.debug_domains[event.name]:
return True
return False
eid = str(event.__class__)[8:-2]
if self.eventmask and eid not in self.eventmask:
return False
return True
def set_UIHmask(handlerNum, level, debug_domains, mask):
if not handlerNum in _ui_handlers:
return False
if '*' in mask:
_ui_logfilters[handlerNum].update(None, level, debug_domains)
else:
_ui_logfilters[handlerNum].update(mask, level, debug_domains)
return True
def getName(e):
"""Returns the name of a class or class instance"""
if getattr(e, "__name__", None) is None:
return e.__class__.__name__
else:
return e.__name__
class OperationStarted(Event):
"""An operation has begun"""
def __init__(self, msg = "Operation Started"):
Event.__init__(self)
self.msg = msg
class OperationCompleted(Event):
"""An operation has completed"""
def __init__(self, total, msg = "Operation Completed"):
Event.__init__(self)
self.total = total
self.msg = msg
class OperationProgress(Event):
"""An operation is in progress"""
def __init__(self, current, total, msg = "Operation in Progress"):
Event.__init__(self)
self.current = current
self.total = total
self.msg = msg + ": %s/%s" % (current, total);
class ConfigParsed(Event):
"""Configuration Parsing Complete"""
class MultiConfigParsed(Event):
"""Multi-Config Parsing Complete"""
def __init__(self, mcdata):
self.mcdata = mcdata
Event.__init__(self)
class RecipeEvent(Event):
def __init__(self, fn):
self.fn = fn
Event.__init__(self)
class RecipePreFinalise(RecipeEvent):
""" Recipe Parsing Complete but not yet finalised"""
class RecipePostKeyExpansion(RecipeEvent):
""" Recipe Parsing Complete but not yet finalised"""
class RecipeTaskPreProcess(RecipeEvent):
"""
Recipe Tasks about to be finalised
The list of tasks should be final at this point and handlers
are only able to change interdependencies
"""
def __init__(self, fn, tasklist):
self.fn = fn
self.tasklist = tasklist
Event.__init__(self)
class RecipeParsed(RecipeEvent):
""" Recipe Parsing Complete """
class BuildBase(Event):
"""Base class for bitbake build events"""
def __init__(self, n, p, failures = 0):
self._name = n
self._pkgs = p
Event.__init__(self)
self._failures = failures
def getPkgs(self):
return self._pkgs
def setPkgs(self, pkgs):
self._pkgs = pkgs
def getName(self):
return self._name
def setName(self, name):
self._name = name
def getFailures(self):
"""
Return the number of failed packages
"""
return self._failures
pkgs = property(getPkgs, setPkgs, None, "pkgs property")
name = property(getName, setName, None, "name property")
class BuildInit(BuildBase):
"""buildFile or buildTargets was invoked"""
def __init__(self, p=[]):
name = None
BuildBase.__init__(self, name, p)
class BuildStarted(BuildBase, OperationStarted):
"""Event when builds start"""
def __init__(self, n, p, failures = 0):
OperationStarted.__init__(self, "Building Started")
BuildBase.__init__(self, n, p, failures)
class BuildCompleted(BuildBase, OperationCompleted):
"""Event when builds have completed"""
def __init__(self, total, n, p, failures=0, interrupted=0):
if not failures:
OperationCompleted.__init__(self, total, "Building Succeeded")
else:
OperationCompleted.__init__(self, total, "Building Failed")
self._interrupted = interrupted
BuildBase.__init__(self, n, p, failures)
class DiskFull(Event):
"""Disk full case build halted"""
def __init__(self, dev, type, freespace, mountpoint):
Event.__init__(self)
self._dev = dev
self._type = type
self._free = freespace
self._mountpoint = mountpoint
class DiskUsageSample:
def __init__(self, available_bytes, free_bytes, total_bytes):
# Number of bytes available to non-root processes.
self.available_bytes = available_bytes
# Number of bytes available to root processes.
self.free_bytes = free_bytes
# Total capacity of the volume.
self.total_bytes = total_bytes
class MonitorDiskEvent(Event):
"""If BB_DISKMON_DIRS is set, then this event gets triggered each time disk space is checked.
Provides information about devices that are getting monitored."""
def __init__(self, disk_usage):
Event.__init__(self)
# hash of device root path -> DiskUsageSample
self.disk_usage = disk_usage
class NoProvider(Event):
"""No Provider for an Event"""
def __init__(self, item, runtime=False, dependees=None, reasons=None, close_matches=None):
Event.__init__(self)
self._item = item
self._runtime = runtime
self._dependees = dependees
self._reasons = reasons
self._close_matches = close_matches
def getItem(self):
return self._item
def isRuntime(self):
return self._runtime
def __str__(self):
msg = ''
if self._runtime:
r = "R"
else:
r = ""
extra = ''
if not self._reasons:
if self._close_matches:
extra = ". Close matches:\n %s" % '\n '.join(sorted(set(self._close_matches)))
if self._dependees:
msg = "Nothing %sPROVIDES '%s' (but %s %sDEPENDS on or otherwise requires it)%s" % (r, self._item, ", ".join(self._dependees), r, extra)
else:
msg = "Nothing %sPROVIDES '%s'%s" % (r, self._item, extra)
if self._reasons:
for reason in self._reasons:
msg += '\n' + reason
return msg
class MultipleProviders(Event):
"""Multiple Providers"""
def __init__(self, item, candidates, runtime = False):
Event.__init__(self)
self._item = item
self._candidates = candidates
self._is_runtime = runtime
def isRuntime(self):
"""
Is this a runtime issue?
"""
return self._is_runtime
def getItem(self):
"""
The name for the to be build item
"""
return self._item
def getCandidates(self):
"""
Get the possible Candidates for a PROVIDER.
"""
return self._candidates
def __str__(self):
msg = "Multiple providers are available for %s%s (%s)" % (self._is_runtime and "runtime " or "",
self._item,
", ".join(self._candidates))
rtime = ""
if self._is_runtime:
rtime = "R"
msg += "\nConsider defining a PREFERRED_%sPROVIDER entry to match %s" % (rtime, self._item)
return msg
class ParseStarted(OperationStarted):
"""Recipe parsing for the runqueue has begun"""
def __init__(self, total):
OperationStarted.__init__(self, "Recipe parsing Started")
self.total = total
class ParseCompleted(OperationCompleted):
"""Recipe parsing for the runqueue has completed"""
def __init__(self, cached, parsed, skipped, masked, virtuals, errors, total):
OperationCompleted.__init__(self, total, "Recipe parsing Completed")
self.cached = cached
self.parsed = parsed
self.skipped = skipped
self.virtuals = virtuals
self.masked = masked
self.errors = errors
self.sofar = cached + parsed
class ParseProgress(OperationProgress):
"""Recipe parsing progress"""
def __init__(self, current, total):
OperationProgress.__init__(self, current, total, "Recipe parsing")
class CacheLoadStarted(OperationStarted):
"""Loading of the dependency cache has begun"""
def __init__(self, total):
OperationStarted.__init__(self, "Loading cache Started")
self.total = total
class CacheLoadProgress(OperationProgress):
"""Cache loading progress"""
def __init__(self, current, total):
OperationProgress.__init__(self, current, total, "Loading cache")
class CacheLoadCompleted(OperationCompleted):
"""Cache loading is complete"""
def __init__(self, total, num_entries):
OperationCompleted.__init__(self, total, "Loading cache Completed")
self.num_entries = num_entries
class TreeDataPreparationStarted(OperationStarted):
"""Tree data preparation started"""
def __init__(self):
OperationStarted.__init__(self, "Preparing tree data Started")
class TreeDataPreparationProgress(OperationProgress):
"""Tree data preparation is in progress"""
def __init__(self, current, total):
OperationProgress.__init__(self, current, total, "Preparing tree data")
class TreeDataPreparationCompleted(OperationCompleted):
"""Tree data preparation completed"""
def __init__(self, total):
OperationCompleted.__init__(self, total, "Preparing tree data Completed")
class DepTreeGenerated(Event):
"""
Event when a dependency tree has been generated
"""
def __init__(self, depgraph):
Event.__init__(self)
self._depgraph = depgraph
class TargetsTreeGenerated(Event):
"""
Event when a set of buildable targets has been generated
"""
def __init__(self, model):
Event.__init__(self)
self._model = model
class ReachableStamps(Event):
"""
An event listing all stamps reachable after parsing
which the metadata may use to clean up stale data
"""
def __init__(self, stamps):
Event.__init__(self)
self.stamps = stamps
class StaleSetSceneTasks(Event):
"""
An event listing setscene tasks which are 'stale' and will
be rerun. The metadata may use to clean up stale data.
tasks is a mapping of tasks and matching stale stamps.
"""
def __init__(self, tasks):
Event.__init__(self)
self.tasks = tasks
class FilesMatchingFound(Event):
"""
Event when a list of files matching the supplied pattern has
been generated
"""
def __init__(self, pattern, matches):
Event.__init__(self)
self._pattern = pattern
self._matches = matches
class ConfigFilesFound(Event):
"""
Event when a list of appropriate config files has been generated
"""
def __init__(self, variable, values):
Event.__init__(self)
self._variable = variable
self._values = values
class ConfigFilePathFound(Event):
"""
Event when a path for a config file has been found
"""
def __init__(self, path):
Event.__init__(self)
self._path = path
class MsgBase(Event):
"""Base class for messages"""
def __init__(self, msg):
self._message = msg
Event.__init__(self)
class MsgDebug(MsgBase):
"""Debug Message"""
class MsgNote(MsgBase):
"""Note Message"""
class MsgWarn(MsgBase):
"""Warning Message"""
class MsgError(MsgBase):
"""Error Message"""
class MsgFatal(MsgBase):
"""Fatal Message"""
class MsgPlain(MsgBase):
"""General output"""
class LogExecTTY(Event):
"""Send event containing program to spawn on tty of the logger"""
def __init__(self, msg, prog, sleep_delay, retries):
Event.__init__(self)
self.msg = msg
self.prog = prog
self.sleep_delay = sleep_delay
self.retries = retries
class LogHandler(logging.Handler):
"""Dispatch logging messages as bitbake events"""
def emit(self, record):
if record.exc_info:
etype, value, tb = record.exc_info
if hasattr(tb, 'tb_next'):
tb = list(bb.exceptions.extract_traceback(tb, context=3))
# Need to turn the value into something the logging system can pickle
record.bb_exc_info = (etype, value, tb)
record.bb_exc_formatted = bb.exceptions.format_exception(etype, value, tb, limit=5)
value = str(value)
record.exc_info = None
fire(record, None)
def filter(self, record):
record.taskpid = worker_pid
return True
class MetadataEvent(Event):
"""
Generic event that target for OE-Core classes
to report information during asynchronous execution
"""
def __init__(self, eventtype, eventdata):
Event.__init__(self)
self.type = eventtype
self._localdata = eventdata
class ProcessStarted(Event):
"""
Generic process started event (usually part of the initial startup)
where further progress events will be delivered
"""
def __init__(self, processname, total):
Event.__init__(self)
self.processname = processname
self.total = total
class ProcessProgress(Event):
"""
Generic process progress event (usually part of the initial startup)
"""
def __init__(self, processname, progress):
Event.__init__(self)
self.processname = processname
self.progress = progress
class ProcessFinished(Event):
"""
Generic process finished event (usually part of the initial startup)
"""
def __init__(self, processname):
Event.__init__(self)
self.processname = processname
class SanityCheck(Event):
"""
Event to run sanity checks, either raise errors or generate events as return status.
"""
def __init__(self, generateevents = True):
Event.__init__(self)
self.generateevents = generateevents
class SanityCheckPassed(Event):
"""
Event to indicate sanity check has passed
"""
class SanityCheckFailed(Event):
"""
Event to indicate sanity check has failed
"""
def __init__(self, msg, network_error=False):
Event.__init__(self)
self._msg = msg
self._network_error = network_error
class NetworkTest(Event):
"""
Event to run network connectivity tests, either raise errors or generate events as return status.
"""
def __init__(self, generateevents = True):
Event.__init__(self)
self.generateevents = generateevents
class NetworkTestPassed(Event):
"""
Event to indicate network test has passed
"""
class NetworkTestFailed(Event):
"""
Event to indicate network test has failed
"""
class FindSigInfoResult(Event):
"""
Event to return results from findSigInfo command
"""
def __init__(self, result):
Event.__init__(self)
self.result = result