1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "VRProcessParent.h"
#include "VRGPUChild.h"
#include "VRProcessManager.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/dom/MemoryReportRequest.h"
#include "mozilla/gfx/GPUProcessManager.h"
#include "mozilla/gfx/GPUChild.h"
#include "mozilla/ipc/Endpoint.h"
#include "mozilla/ipc/ProcessChild.h"
#include "mozilla/ipc/ProcessUtils.h"
#include "mozilla/ipc/ProtocolTypes.h"
#include "mozilla/ipc/ProtocolUtils.h" // for IToplevelProtocol
#include "mozilla/Preferences.h"
#include "mozilla/StaticPrefs_dom.h"
#include "mozilla/TimeStamp.h" // for TimeStamp
#include "mozilla/Unused.h"
#include "VRChild.h"
#include "VRThread.h"
#include "nsAppRunner.h" // for IToplevelProtocol
using std::string;
using std::vector;
using namespace mozilla::ipc;
namespace mozilla {
namespace gfx {
VRProcessParent::VRProcessParent(Listener* aListener)
: GeckoChildProcessHost(GeckoProcessType_VR),
mTaskFactory(this),
mListener(aListener),
mLaunchPhase(LaunchPhase::Unlaunched),
mChannelClosed(false),
mShutdownRequested(false) {}
VRProcessParent::~VRProcessParent() = default;
bool VRProcessParent::Launch() {
MOZ_ASSERT(mLaunchPhase == LaunchPhase::Unlaunched);
MOZ_ASSERT(!mVRChild);
mLaunchThread = NS_GetCurrentThread();
mLaunchPhase = LaunchPhase::Waiting;
std::vector<std::string> extraArgs;
ProcessChild::AddPlatformBuildID(extraArgs);
mPrefSerializer = MakeUnique<ipc::SharedPreferenceSerializer>();
if (!mPrefSerializer->SerializeToSharedMemory(GeckoProcessType_VR,
/* remoteType */ ""_ns)) {
return false;
}
mPrefSerializer->AddSharedPrefCmdLineArgs(*this, extraArgs);
if (!GeckoChildProcessHost::AsyncLaunch(extraArgs)) {
mLaunchPhase = LaunchPhase::Complete;
mPrefSerializer = nullptr;
return false;
}
return true;
}
bool VRProcessParent::WaitForLaunch() {
if (mLaunchPhase == LaunchPhase::Complete) {
return !!mVRChild;
}
int32_t timeoutMs =
StaticPrefs::dom_vr_process_startup_timeout_ms_AtStartup();
// If one of the following environment variables are set we can effectively
// ignore the timeout - as we can guarantee the compositor process will be
// terminated
if (PR_GetEnv("MOZ_DEBUG_CHILD_PROCESS") ||
PR_GetEnv("MOZ_DEBUG_CHILD_PAUSE")) {
timeoutMs = 0;
}
// Our caller expects the connection to be finished after we return, so we
// immediately set up the IPDL actor and fire callbacks. The IO thread will
// still dispatch a notification to the main thread - we'll just ignore it.
bool result = GeckoChildProcessHost::WaitUntilConnected(timeoutMs);
result &= InitAfterConnect(result);
return result;
}
void VRProcessParent::Shutdown() {
MOZ_ASSERT(!mShutdownRequested);
mListener = nullptr;
if (mVRChild) {
// The channel might already be closed if we got here unexpectedly.
if (!mChannelClosed) {
mVRChild->Close();
}
// OnChannelClosed uses this to check if the shutdown was expected or
// unexpected.
mShutdownRequested = true;
#ifndef NS_FREE_PERMANENT_DATA
// No need to communicate shutdown, the VR process doesn't need to
// communicate anything back.
KillHard("NormalShutdown");
#endif
// If we're shutting down unexpectedly, we're in the middle of handling an
// ActorDestroy for PVRChild, which is still on the stack. We'll return
// back to OnChannelClosed.
//
// Otherwise, we'll wait for OnChannelClose to be called whenever PVRChild
// acknowledges shutdown.
return;
}
DestroyProcess();
}
void VRProcessParent::DestroyProcess() {
if (mLaunchThread) {
// Cancel all tasks. We don't want anything triggering after our caller
// expects this to go away.
{
MonitorAutoLock lock(mMonitor);
mTaskFactory.RevokeAll();
}
mLaunchThread->Dispatch(NS_NewRunnableFunction("DestroyProcessRunnable",
[this] { Destroy(); }));
}
}
bool VRProcessParent::InitAfterConnect(bool aSucceeded) {
MOZ_ASSERT(mLaunchPhase == LaunchPhase::Waiting);
MOZ_ASSERT(!mVRChild);
mLaunchPhase = LaunchPhase::Complete;
mPrefSerializer = nullptr;
if (aSucceeded) {
GPUChild* gpuChild = GPUProcessManager::Get()->GetGPUChild();
if (!gpuChild) {
NS_WARNING(
"GPU process haven't connected with the parent process yet"
"when creating VR process.");
return false;
}
if (!StaticPrefs::dom_vr_enabled() &&
!StaticPrefs::dom_vr_webxr_enabled()) {
NS_WARNING("VR is not enabled when trying to create a VRChild");
return false;
}
mVRChild = MakeRefPtr<VRChild>(this);
DebugOnly<bool> rv = TakeInitialEndpoint().Bind(mVRChild.get());
MOZ_ASSERT(rv);
mVRChild->Init();
if (mListener) {
mListener->OnProcessLaunchComplete(this);
}
// Make vr-gpu process connection
Endpoint<PVRGPUChild> vrGPUBridge;
VRProcessManager* vpm = VRProcessManager::Get();
DebugOnly<bool> opened =
vpm->CreateGPUBridges(gpuChild->OtherPid(), &vrGPUBridge);
MOZ_ASSERT(opened);
Unused << gpuChild->SendInitVR(std::move(vrGPUBridge));
}
return true;
}
void VRProcessParent::KillHard(const char* aReason) {
ProcessHandle handle = GetChildProcessHandle();
if (!base::KillProcess(handle, base::PROCESS_END_KILLED_BY_USER)) {
NS_WARNING("failed to kill subprocess!");
}
SetAlreadyDead();
}
void VRProcessParent::OnChannelError() {
MOZ_ASSERT(false, "VR process channel error.");
}
void VRProcessParent::OnChannelConnected(base::ProcessId peer_pid) {
MOZ_ASSERT(!NS_IsMainThread());
GeckoChildProcessHost::OnChannelConnected(peer_pid);
// Post a task to the main thread. Take the lock because mTaskFactory is not
// thread-safe.
RefPtr<Runnable> runnable;
{
MonitorAutoLock lock(mMonitor);
runnable = mTaskFactory.NewRunnableMethod(
&VRProcessParent::OnChannelConnectedTask);
}
NS_DispatchToMainThread(runnable);
}
void VRProcessParent::OnChannelConnectedTask() {
if (mLaunchPhase == LaunchPhase::Waiting) {
InitAfterConnect(true);
}
}
void VRProcessParent::OnChannelErrorTask() {
if (mLaunchPhase == LaunchPhase::Waiting) {
InitAfterConnect(false);
}
}
void VRProcessParent::OnChannelClosed() {
mChannelClosed = true;
if (!mShutdownRequested && mListener) {
// This is an unclean shutdown. Notify we're going away.
mListener->OnProcessUnexpectedShutdown(this);
} else {
DestroyProcess();
}
// Release the actor.
VRChild::Destroy(std::move(mVRChild));
MOZ_ASSERT(!mVRChild);
}
base::ProcessId VRProcessParent::OtherPid() { return mVRChild->OtherPid(); }
bool VRProcessParent::IsConnected() const { return !!mVRChild; }
} // namespace gfx
} // namespace mozilla
|
