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
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/common/ipc_message.h"
#include "base/logging.h"
#include "build/build_config.h"
#if defined(OS_POSIX)
# include "chrome/common/file_descriptor_set_posix.h"
#endif
#ifdef MOZ_TASK_TRACER
# include "GeckoTaskTracerImpl.h"
#endif
#include <utility>
#include "nsISupportsImpl.h"
#ifdef MOZ_TASK_TRACER
using namespace mozilla::tasktracer;
# define MSG_HEADER_SZ \
(IsStartLogging() && GetOrCreateTraceInfo() == nullptr \
? sizeof(Header) \
: sizeof(HeaderTaskTracer))
#else
# define MSG_HEADER_SZ sizeof(Header)
#endif
namespace IPC {
//------------------------------------------------------------------------------
Message::~Message() { MOZ_COUNT_DTOR(IPC::Message); }
Message::Message() : Pickle(MSG_HEADER_SZ) {
MOZ_COUNT_CTOR(IPC::Message);
header()->routing = header()->type = 0;
#if defined(OS_POSIX)
header()->num_fds = 0;
#endif
#ifdef MOZ_TASK_TRACER
if (UseTaskTracerHeader()) {
header()->flags.SetTaskTracer();
HeaderTaskTracer* _header = static_cast<HeaderTaskTracer*>(header());
GetCurTraceInfo(&_header->source_event_id, &_header->parent_task_id,
&_header->source_event_type);
}
#endif
}
Message::Message(int32_t routing_id, msgid_t type, uint32_t segment_capacity,
HeaderFlags flags, bool recordWriteLatency)
: Pickle(MSG_HEADER_SZ, segment_capacity) {
MOZ_COUNT_CTOR(IPC::Message);
header()->routing = routing_id;
header()->type = type;
header()->flags = flags;
#if defined(OS_POSIX)
header()->num_fds = 0;
#endif
header()->interrupt_remote_stack_depth_guess = static_cast<uint32_t>(-1);
header()->interrupt_local_stack_depth = static_cast<uint32_t>(-1);
header()->seqno = 0;
#if defined(OS_MACOSX)
header()->cookie = 0;
#endif
#ifdef MOZ_TASK_TRACER
if (UseTaskTracerHeader()) {
header()->flags.SetTaskTracer();
HeaderTaskTracer* _header = static_cast<HeaderTaskTracer*>(header());
GetCurTraceInfo(&_header->source_event_id, &_header->parent_task_id,
&_header->source_event_type);
}
#endif
if (recordWriteLatency) {
create_time_ = mozilla::TimeStamp::Now();
}
}
#ifndef MOZ_TASK_TRACER
# define MSG_HEADER_SZ_DATA sizeof(Header)
#else
# define MSG_HEADER_SZ_DATA \
(reinterpret_cast<const Header*>(data)->flags.IsTaskTracer() \
? sizeof(HeaderTaskTracer) \
: sizeof(Header))
#endif
Message::Message(const char* data, int data_len)
: Pickle(MSG_HEADER_SZ_DATA, data, data_len) {
MOZ_COUNT_CTOR(IPC::Message);
}
Message::Message(Message&& other) : Pickle(std::move(other)) {
MOZ_COUNT_CTOR(IPC::Message);
#if defined(OS_POSIX)
file_descriptor_set_ = std::move(other.file_descriptor_set_);
#endif
}
/*static*/ Message* Message::IPDLMessage(int32_t routing_id, msgid_t type,
HeaderFlags flags) {
return new Message(routing_id, type, 0, flags, true);
}
/*static*/ Message* Message::ForSyncDispatchError(NestedLevel level) {
auto* m = new Message(0, 0, 0, HeaderFlags(level));
auto& flags = m->header()->flags;
flags.SetSync();
flags.SetReply();
flags.SetReplyError();
return m;
}
/*static*/ Message* Message::ForInterruptDispatchError() {
auto* m = new Message();
auto& flags = m->header()->flags;
flags.SetInterrupt();
flags.SetReply();
flags.SetReplyError();
return m;
}
Message& Message::operator=(Message&& other) {
*static_cast<Pickle*>(this) = std::move(other);
#if defined(OS_POSIX)
file_descriptor_set_.swap(other.file_descriptor_set_);
#endif
return *this;
}
void Message::CopyFrom(const Message& other) {
Pickle::CopyFrom(other);
#if defined(OS_POSIX)
MOZ_ASSERT(!file_descriptor_set_);
if (other.file_descriptor_set_) {
file_descriptor_set_ = new FileDescriptorSet;
file_descriptor_set_->CopyFrom(*other.file_descriptor_set_);
}
#endif
}
#if defined(OS_POSIX)
bool Message::WriteFileDescriptor(const base::FileDescriptor& descriptor) {
// We write the index of the descriptor so that we don't have to
// keep the current descriptor as extra decoding state when deserialising.
// Also, we rely on each file descriptor being accompanied by sizeof(int)
// bytes of data in the message. See the comment for input_cmsg_buf_.
WriteInt(file_descriptor_set()->size());
if (descriptor.auto_close) {
return file_descriptor_set()->AddAndAutoClose(descriptor.fd);
} else {
return file_descriptor_set()->Add(descriptor.fd);
}
}
bool Message::ReadFileDescriptor(PickleIterator* iter,
base::FileDescriptor* descriptor) const {
int descriptor_index;
if (!ReadInt(iter, &descriptor_index)) return false;
FileDescriptorSet* file_descriptor_set = file_descriptor_set_.get();
if (!file_descriptor_set) return false;
descriptor->fd = file_descriptor_set->GetDescriptorAt(descriptor_index);
descriptor->auto_close = false;
return descriptor->fd >= 0;
}
void Message::EnsureFileDescriptorSet() {
if (file_descriptor_set_.get() == NULL)
file_descriptor_set_ = new FileDescriptorSet;
}
uint32_t Message::num_fds() const {
return file_descriptor_set() ? file_descriptor_set()->size() : 0;
}
#endif
void Message::AssertAsLargeAsHeader() const {
MOZ_DIAGNOSTIC_ASSERT(size() >= MSG_HEADER_SZ);
MOZ_DIAGNOSTIC_ASSERT(CurrentSize() >= MSG_HEADER_SZ);
// Our buffers should agree with what our header specifies.
MOZ_DIAGNOSTIC_ASSERT(size() == CurrentSize());
}
#ifdef MOZ_TASK_TRACER
void* MessageTask() { return reinterpret_cast<void*>(&MessageTask); }
void Message::TaskTracerDispatch() {
if (header()->flags.IsTaskTracer()) {
HeaderTaskTracer* _header = static_cast<HeaderTaskTracer*>(header());
_header->task_id = GenNewUniqueTaskId();
uintptr_t* vtab = reinterpret_cast<uintptr_t*>(&MessageTask);
LogVirtualTablePtr(_header->task_id, _header->source_event_id, vtab);
LogDispatch(_header->task_id, _header->parent_task_id,
_header->source_event_id, _header->source_event_type);
}
}
Message::AutoTaskTracerRun::AutoTaskTracerRun(Message& aMsg)
: mMsg(aMsg), mTaskId(0), mSourceEventId(0) {
if (mMsg.header()->flags.IsTaskTracer()) {
const HeaderTaskTracer* _header =
static_cast<HeaderTaskTracer*>(mMsg.header());
LogBegin(_header->task_id, _header->source_event_id);
SetCurTraceInfo(_header->source_event_id, _header->task_id,
_header->source_event_type);
mTaskId = _header->task_id;
mSourceEventId = _header->source_event_id;
} else {
SetCurTraceInfo(0, 0, SourceEventType::Unknown);
}
}
Message::AutoTaskTracerRun::~AutoTaskTracerRun() {
if (mTaskId) {
AddLabel("IPC Message %s", mMsg.name());
LogEnd(mTaskId, mSourceEventId);
}
}
#endif
} // namespace IPC
|
