1 files changed, 129 insertions, 75 deletions

diff --git a/bitbake/lib/bb/event.py b/bitbake/lib/bb/event.py
index 23e1f3187b..b29f0a5568 100644
--- a/bitbake/lib/bb/event.py
+++ b/bitbake/lib/bb/event.py
@@ -19,7 +19,6 @@ 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
@@ -40,7 +39,7 @@ 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 occassionally."""
+       event is more suitable for doing some task-independent work occasionally."""
     def __init__(self, time):
         Event.__init__(self)
         self.time = time
@@ -68,29 +67,39 @@ _catchall_handlers = {}
 _eventfilter = None
 _uiready = False
 _thread_lock = threading.Lock()
-_thread_lock_enabled = False
-
-if hasattr(__builtins__, '__setitem__'):
-    builtins = __builtins__
-else:
-    builtins = __builtins__.__dict__
+_heartbeat_enabled = False
+_should_exit = threading.Event()
 
 def enable_threadlock():
-    global _thread_lock_enabled
-    _thread_lock_enabled = True
+    # Always needed now
+    return
 
 def disable_threadlock():
-    global _thread_lock_enabled
-    _thread_lock_enabled = False
+    # 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
-    addedd = False
-    if 'd' not in builtins:
-        builtins['d'] = d
-        addedd = True
     try:
-        ret = handler(event)
+        ret = handler(event, d)
     except (bb.parse.SkipRecipe, bb.BBHandledException):
         raise
     except Exception:
@@ -104,8 +113,7 @@ def execute_handler(name, handler, event, d):
         raise
     finally:
         del event.data
-        if addedd:
-            del builtins['d']
+
 
 def fire_class_handlers(event, d):
     if isinstance(event, logging.LogRecord):
@@ -118,7 +126,7 @@ def fire_class_handlers(event, d):
             if _eventfilter:
                 if not _eventfilter(name, handler, event, d):
                     continue
-            if d and not name in (d.getVar("__BBHANDLERS_MC") or []):
+            if d is not None and not name in (d.getVar("__BBHANDLERS_MC") or set()):
                 continue
             execute_handler(name, handler, event, d)
 
@@ -132,8 +140,14 @@ def print_ui_queue():
     if not _uiready:
         from bb.msg import BBLogFormatter
         # Flush any existing buffered content
-        sys.stdout.flush()
-        sys.stderr.flush()
+        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")
@@ -174,36 +188,38 @@ def print_ui_queue():
 
 def fire_ui_handlers(event, d):
     global _thread_lock
-    global _thread_lock_enabled
 
     if not _uiready:
         # No UI handlers registered yet, queue up the messages
         ui_queue.append(event)
         return
 
-    if _thread_lock_enabled:
-        _thread_lock.acquire()
-
-    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]
+    with bb.utils.lock_timeout_nocheck(_thread_lock) as lock:
+        if not lock:
+            # If we can't get the lock, we may be recursively called, queue and return
+            ui_queue.append(event)
+            return
 
-    if _thread_lock_enabled:
-        _thread_lock.release()
+        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]
+
+    while ui_queue:
+        fire_ui_handlers(ui_queue.pop(), d)
 
 def fire(event, d):
     """Fire off an Event"""
@@ -232,26 +248,31 @@ noop = lambda _: None
 def register(name, handler, mask=None, filename=None, lineno=None, data=None):
     """Register an Event handler"""
 
-    if data and data.getVar("BB_CURRENT_MC"):
+    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):\n%s" % (name, handler)
+            tmp = "def %s(e, d):\n%s" % (name, handler)
+            # Inject empty lines to make code match lineno in filename
+            if lineno is not None:
+                tmp = "\n" * (lineno-1) + tmp
             try:
                 code = bb.methodpool.compile_cache(tmp)
                 if not code:
                     if filename is None:
-                        filename = "%s(e)" % name
+                        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:
@@ -274,16 +295,16 @@ def register(name, handler, mask=None, filename=None, lineno=None, data=None):
                     _event_handler_map[m] = {}
                 _event_handler_map[m][name] = True
 
-        if data:
-            bbhands_mc = (data.getVar("__BBHANDLERS_MC") or [])
-            bbhands_mc.append(name)
+        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:
+    if data is not None:
         if data.getVar("BB_CURRENT_MC"):
             mc = data.getVar("BB_CURRENT_MC")
             name = '%s%s' % (mc.replace('-', '_'), name)
@@ -295,8 +316,8 @@ def remove(name, handler, data=None):
         if name in _event_handler_map[event]:
             _event_handler_map[event].pop(name)
 
-    if data:
-        bbhands_mc = (data.getVar("__BBHANDLERS_MC") or [])
+    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)
@@ -313,21 +334,23 @@ def set_eventfilter(func):
     _eventfilter = func
 
 def register_UIHhandler(handler, mainui=False):
-    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
+    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
-    if handlerNum in _ui_handlers:
-        del _ui_handlers[handlerNum]
+    with bb.utils.lock_timeout(_thread_lock):
+        if handlerNum in _ui_handlers:
+            del _ui_handlers[handlerNum]
     return
 
 def get_uihandler():
@@ -408,6 +431,16 @@ class RecipeEvent(Event):
         self.fn = fn
         Event.__init__(self)
 
+class RecipePreDeferredInherits(RecipeEvent):
+    """
+    Called before deferred inherits are processed so code can snoop on class extensions for example
+    Limitations: It won't see inherits of inherited classes and the data is unexpanded
+    """
+    def __init__(self, fn, inherits):
+        self.fn = fn
+        self.inherits = inherits
+        Event.__init__(self)
+
 class RecipePreFinalise(RecipeEvent):
     """ Recipe Parsing Complete but not yet finalised"""
 
@@ -482,7 +515,7 @@ class BuildCompleted(BuildBase, OperationCompleted):
         BuildBase.__init__(self, n, p, failures)
 
 class DiskFull(Event):
-    """Disk full case build aborted"""
+    """Disk full case build halted"""
     def __init__(self, dev, type, freespace, mountpoint):
         Event.__init__(self)
         self._dev = dev
@@ -666,6 +699,17 @@ class ReachableStamps(Event):
         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
@@ -732,13 +776,7 @@ class LogHandler(logging.Handler):
 
     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.bb_exc_formatted = traceback.format_exception(*record.exc_info)
             record.exc_info = None
         fire(record, None)
 
@@ -749,7 +787,7 @@ class LogHandler(logging.Handler):
 class MetadataEvent(Event):
     """
     Generic event that target for OE-Core classes
-    to report information during asynchrous execution
+    to report information during asynchronous execution
     """
     def __init__(self, eventtype, eventdata):
         Event.__init__(self)
@@ -830,3 +868,19 @@ class FindSigInfoResult(Event):
     def __init__(self, result):
         Event.__init__(self)
         self.result = result
+
+class GetTaskSignatureResult(Event):
+    """
+    Event to return results from GetTaskSignatures command
+    """
+    def __init__(self, sig):
+        Event.__init__(self)
+        self.sig = sig
+
+class ParseError(Event):
+    """
+    Event to indicate parse failed
+    """
+    def __init__(self, msg):
+        super().__init__()
+        self._msg = msg