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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "ipc/ipc_channel_proxy.h" | 5 #include "ipc/ipc_channel_proxy.h" |
6 | 6 |
7 #include <stddef.h> | 7 #include <stddef.h> |
8 #include <stdint.h> | 8 #include <stdint.h> |
9 | 9 |
10 #include <utility> | 10 #include <utility> |
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41 //------------------------------------------------------------------------------ | 41 //------------------------------------------------------------------------------ |
42 | 42 |
43 ChannelProxy::Context::Context( | 43 ChannelProxy::Context::Context( |
44 Listener* listener, | 44 Listener* listener, |
45 const scoped_refptr<base::SingleThreadTaskRunner>& ipc_task_runner) | 45 const scoped_refptr<base::SingleThreadTaskRunner>& ipc_task_runner) |
46 : listener_task_runner_(base::ThreadTaskRunnerHandle::Get()), | 46 : listener_task_runner_(base::ThreadTaskRunnerHandle::Get()), |
47 listener_(listener), | 47 listener_(listener), |
48 ipc_task_runner_(ipc_task_runner), | 48 ipc_task_runner_(ipc_task_runner), |
49 channel_connected_called_(false), | 49 channel_connected_called_(false), |
50 message_filter_router_(new MessageFilterRouter()), | 50 message_filter_router_(new MessageFilterRouter()), |
51 peer_pid_(base::kNullProcessId), | 51 peer_pid_(base::kNullProcessId) { |
52 attachment_broker_endpoint_(false) { | |
53 DCHECK(ipc_task_runner_.get()); | 52 DCHECK(ipc_task_runner_.get()); |
54 // The Listener thread where Messages are handled must be a separate thread | 53 // The Listener thread where Messages are handled must be a separate thread |
55 // to avoid oversubscribing the IO thread. If you trigger this error, you | 54 // to avoid oversubscribing the IO thread. If you trigger this error, you |
56 // need to either: | 55 // need to either: |
57 // 1) Create the ChannelProxy on a different thread, or | 56 // 1) Create the ChannelProxy on a different thread, or |
58 // 2) Just use Channel | 57 // 2) Just use Channel |
59 // Note, we currently make an exception for a NULL listener. That usage | 58 // Note, we currently make an exception for a NULL listener. That usage |
60 // basically works, but is outside the intent of ChannelProxy. This support | 59 // basically works, but is outside the intent of ChannelProxy. This support |
61 // will disappear, so please don't rely on it. See crbug.com/364241 | 60 // will disappear, so please don't rely on it. See crbug.com/364241 |
62 DCHECK(!listener || (ipc_task_runner_.get() != listener_task_runner_.get())); | 61 DCHECK(!listener || (ipc_task_runner_.get() != listener_task_runner_.get())); |
63 } | 62 } |
64 | 63 |
65 ChannelProxy::Context::~Context() { | 64 ChannelProxy::Context::~Context() { |
66 } | 65 } |
67 | 66 |
68 void ChannelProxy::Context::ClearIPCTaskRunner() { | 67 void ChannelProxy::Context::ClearIPCTaskRunner() { |
69 ipc_task_runner_ = NULL; | 68 ipc_task_runner_ = NULL; |
70 } | 69 } |
71 | 70 |
72 void ChannelProxy::Context::CreateChannel( | 71 void ChannelProxy::Context::CreateChannel( |
73 std::unique_ptr<ChannelFactory> factory) { | 72 std::unique_ptr<ChannelFactory> factory) { |
74 base::AutoLock l(channel_lifetime_lock_); | 73 base::AutoLock l(channel_lifetime_lock_); |
75 DCHECK(!channel_); | 74 DCHECK(!channel_); |
76 DCHECK_EQ(factory->GetIPCTaskRunner(), ipc_task_runner_); | 75 DCHECK_EQ(factory->GetIPCTaskRunner(), ipc_task_runner_); |
77 channel_id_ = factory->GetName(); | 76 channel_id_ = factory->GetName(); |
78 channel_ = factory->BuildChannel(this); | 77 channel_ = factory->BuildChannel(this); |
79 channel_->SetAttachmentBrokerEndpoint(attachment_broker_endpoint_); | |
80 | 78 |
81 Channel::AssociatedInterfaceSupport* support = | 79 Channel::AssociatedInterfaceSupport* support = |
82 channel_->GetAssociatedInterfaceSupport(); | 80 channel_->GetAssociatedInterfaceSupport(); |
83 if (support) { | 81 if (support) { |
84 associated_group_ = *support->GetAssociatedGroup(); | 82 associated_group_ = *support->GetAssociatedGroup(); |
85 | 83 |
86 base::AutoLock l(pending_filters_lock_); | 84 base::AutoLock l(pending_filters_lock_); |
87 for (auto& entry : pending_interfaces_) | 85 for (auto& entry : pending_interfaces_) |
88 support->AddGenericAssociatedInterface(entry.first, entry.second); | 86 support->AddGenericAssociatedInterface(entry.first, entry.second); |
89 pending_interfaces_.clear(); | 87 pending_interfaces_.clear(); |
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143 listener_task_runner_->PostTask( | 141 listener_task_runner_->PostTask( |
144 FROM_HERE, base::Bind(&Context::OnDispatchMessage, this, message)); | 142 FROM_HERE, base::Bind(&Context::OnDispatchMessage, this, message)); |
145 return true; | 143 return true; |
146 } | 144 } |
147 | 145 |
148 // Called on the IPC::Channel thread | 146 // Called on the IPC::Channel thread |
149 void ChannelProxy::Context::OnChannelConnected(int32_t peer_pid) { | 147 void ChannelProxy::Context::OnChannelConnected(int32_t peer_pid) { |
150 // We cache off the peer_pid so it can be safely accessed from both threads. | 148 // We cache off the peer_pid so it can be safely accessed from both threads. |
151 { | 149 { |
152 base::AutoLock l(peer_pid_lock_); | 150 base::AutoLock l(peer_pid_lock_); |
153 peer_pid_ = channel_->GetPeerPID(); | 151 peer_pid_ = peer_pid; |
154 } | 152 } |
155 | 153 |
156 // Add any pending filters. This avoids a race condition where someone | 154 // Add any pending filters. This avoids a race condition where someone |
157 // creates a ChannelProxy, calls AddFilter, and then right after starts the | 155 // creates a ChannelProxy, calls AddFilter, and then right after starts the |
158 // peer process. The IO thread could receive a message before the task to add | 156 // peer process. The IO thread could receive a message before the task to add |
159 // the filter is run on the IO thread. | 157 // the filter is run on the IO thread. |
160 OnAddFilter(); | 158 OnAddFilter(); |
161 | 159 |
162 // See above comment about using listener_task_runner_ here. | 160 // See above comment about using listener_task_runner_ here. |
163 listener_task_runner_->PostTask( | 161 listener_task_runner_->PostTask( |
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612 FROM_HERE, base::Bind(&Context::GetRemoteAssociatedInterface, | 610 FROM_HERE, base::Bind(&Context::GetRemoteAssociatedInterface, |
613 context_, name, base::Passed(&handle))); | 611 context_, name, base::Passed(&handle))); |
614 } | 612 } |
615 | 613 |
616 void ChannelProxy::ClearIPCTaskRunner() { | 614 void ChannelProxy::ClearIPCTaskRunner() { |
617 DCHECK(CalledOnValidThread()); | 615 DCHECK(CalledOnValidThread()); |
618 | 616 |
619 context()->ClearIPCTaskRunner(); | 617 context()->ClearIPCTaskRunner(); |
620 } | 618 } |
621 | 619 |
622 base::ProcessId ChannelProxy::GetPeerPID() const { | |
623 base::AutoLock l(context_->peer_pid_lock_); | |
624 return context_->peer_pid_; | |
625 } | |
626 | |
627 void ChannelProxy::OnSetAttachmentBrokerEndpoint() { | |
628 CHECK(!did_init_); | |
629 context()->set_attachment_broker_endpoint(is_attachment_broker_endpoint()); | |
630 } | |
631 | |
632 void ChannelProxy::OnChannelInit() { | 620 void ChannelProxy::OnChannelInit() { |
633 } | 621 } |
634 | 622 |
635 //----------------------------------------------------------------------------- | 623 //----------------------------------------------------------------------------- |
636 | 624 |
637 } // namespace IPC | 625 } // namespace IPC |
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