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# Copyright (C) 2010-2017 Apple Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR
# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import itertools
from collections import Counter, defaultdict
BUILTIN_ATTRIBUTE = "Builtin"
MAINTHREADCALLBACK_ATTRIBUTE = "MainThreadCallback"
CALL_WITH_REPLY_ID_ATTRIBUTE = "CallWithReplyID"
ALLOWEDWHENWAITINGFORSYNCREPLY_ATTRIBUTE = "AllowedWhenWaitingForSyncReply"
ALLOWEDWHENWAITINGFORSYNCREPLYDURINGUNBOUNDEDIPC_ATTRIBUTE = "AllowedWhenWaitingForSyncReplyDuringUnboundedIPC"
SYNCHRONOUS_ATTRIBUTE = 'Synchronous'
STREAM_ATTRIBUTE = "Stream"
class MessageReceiver(object):
def __init__(self, name, superclass, attributes, receiver_enabled_by, receiver_enabled_by_exception, receiver_enabled_by_conjunction, receiver_dispatched_from, receiver_dispatched_to, shared_preferences_needs_connection, messages, condition, namespace):
self.name = name
self.superclass = superclass
self.attributes = frozenset(attributes or [])
self.receiver_enabled_by = receiver_enabled_by
self.receiver_enabled_by_exception = receiver_enabled_by_exception
self.receiver_enabled_by_conjunction = receiver_enabled_by_conjunction
self.receiver_dispatched_from = receiver_dispatched_from
self.receiver_dispatched_to = receiver_dispatched_to
self.shared_preferences_needs_connection = shared_preferences_needs_connection
self.messages = messages
self.condition = condition
self.namespace = namespace
def iterparameters(self):
return itertools.chain((parameter for message in self.messages for parameter in message.parameters),
(reply_parameter for message in self.messages if message.reply_parameters for reply_parameter in message.reply_parameters))
def has_attribute(self, attribute):
return attribute in self.attributes
class Message(object):
def __init__(self, name, parameters, reply_parameters, attributes, condition, validator=None, enabled_by=None, enabled_by_exception=False, enabled_by_conjunction=None, coalescing_key_indices=None):
self.name = name
self.parameters = parameters
self.reply_parameters = reply_parameters
self.attributes = frozenset(attributes or [])
self.condition = condition
self.validator = validator
self.enabled_by = enabled_by
self.enabled_by_exception = enabled_by_exception
self.enabled_by_conjunction = enabled_by_conjunction
self.coalescing_key_indices = coalescing_key_indices
def has_attribute(self, attribute):
return attribute in self.attributes
class Parameter(object):
def __init__(self, kind, type, name, attributes=None, condition=None):
self.kind = kind
self.type = type
self.name = name
self.attributes = frozenset(attributes or [])
self.condition = condition
def has_attribute(self, attribute):
return attribute in self.attributes
ipc_receiver = MessageReceiver(name="IPC", superclass=None, attributes=[BUILTIN_ATTRIBUTE], receiver_enabled_by=None, receiver_enabled_by_exception=False, receiver_enabled_by_conjunction=None, receiver_dispatched_from=None, receiver_dispatched_to=None, shared_preferences_needs_connection=False, messages=[
Message('WrappedAsyncMessageForTesting', [], [], attributes=[BUILTIN_ATTRIBUTE, SYNCHRONOUS_ATTRIBUTE, ALLOWEDWHENWAITINGFORSYNCREPLY_ATTRIBUTE], condition=None),
Message('SyncMessageReply', [], [], attributes=[BUILTIN_ATTRIBUTE], condition=None),
Message('CancelSyncMessageReply', [], [], attributes=[BUILTIN_ATTRIBUTE], condition=None),
Message('InitializeConnection', [], [], attributes=[BUILTIN_ATTRIBUTE], condition="PLATFORM(COCOA)"),
Message('LegacySessionState', [], [], attributes=[BUILTIN_ATTRIBUTE], condition=None),
Message('SetStreamDestinationID', [], [], attributes=[BUILTIN_ATTRIBUTE], condition=None),
Message('ProcessOutOfStreamMessage', [], [], attributes=[BUILTIN_ATTRIBUTE], condition=None),
], condition=None, namespace="WebKit")
def check_global_model_inputs(receivers):
errors = []
receiver_counts = Counter([r.name for r in receivers])
receiver_duplicates = [n for n, c in receiver_counts.items() if c > 1]
if receiver_duplicates:
errors.append('Duplicate message receiver names: %s' % (', '.join(receiver_duplicates)))
# A message might be defined multiple times using ifdef conditions.
# Certain attributes must match in this case. E.g. USE(COCOA) cannot have a sync message that
# would be non-sync in USE(GTK).
matching_attributes = [SYNCHRONOUS_ATTRIBUTE]
for receiver in receivers:
receiver_messages = defaultdict(list)
for message in receiver.messages:
receiver_messages[message.name].append(message)
for messages in receiver_messages.values():
m0 = messages[0]
for i in range(1, len(messages)):
mi = messages[i]
if any(m0.has_attribute(a) != mi.has_attribute(a) for a in matching_attributes):
errors.append('Receiver %s message %s attribute mismatch: %s (%s) != %s (%s))' % (receiver.name, message.name,
m0.attributes, m0.condition, mi.attributes, mi.condition))
return errors
def generate_global_model(receivers):
async_reply_messages = []
for receiver in receivers:
for message in receiver.messages:
if message.reply_parameters is not None and not message.has_attribute(SYNCHRONOUS_ATTRIBUTE):
async_reply_messages.append(Message(name='%s_%sReply' % (receiver.name, message.name), parameters=message.reply_parameters, reply_parameters=[], attributes=None, condition=message.condition))
async_reply_receiver = MessageReceiver(name='AsyncReply', superclass='None', attributes=[BUILTIN_ATTRIBUTE], receiver_enabled_by=None, receiver_enabled_by_exception=False, receiver_enabled_by_conjunction=None, receiver_dispatched_from=None, receiver_dispatched_to=None, shared_preferences_needs_connection=False, messages=async_reply_messages, condition=None, namespace='WebKit')
return [ipc_receiver, async_reply_receiver] + receivers
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