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
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
content / browser / tracing / tracing_controller_impl.cc [blame]
// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/tracing/tracing_controller_impl.h"
#include <inttypes.h>
#include <memory>
#include <optional>
#include <string_view>
#include <utility>
#include <vector>
#include "base/command_line.h"
#include "base/containers/span.h"
#include "base/cpu.h"
#include "base/dcheck_is_on.h"
#include "base/files/file_tracing.h"
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "base/i18n/time_formatting.h"
#include "base/logging.h"
#include "base/run_loop.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "base/strings/utf_string_conversions.h"
#include "base/system/sys_info.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/single_thread_task_runner.h"
#include "base/time/time.h"
#include "base/trace_event/trace_config.h"
#include "base/tracing/protos/grit/tracing_proto_resources.h"
#include "base/values.h"
#include "base/version_info/version_info.h"
#include "build/build_config.h"
#include "build/chromeos_buildflags.h"
#include "components/tracing/common/trace_to_console.h"
#include "components/tracing/common/tracing_switches.h"
#include "components/variations/active_field_trials.h"
#include "content/browser/gpu/compositor_util.h"
#include "content/browser/gpu/gpu_data_manager_impl.h"
#include "content/browser/tracing/file_tracing_provider_impl.h"
#include "content/browser/tracing/tracing_ui.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/tracing_controller.h"
#include "content/public/browser/tracing_service.h"
#include "content/public/common/content_client.h"
#include "gpu/config/gpu_info.h"
#include "mojo/public/cpp/system/data_pipe.h"
#include "net/base/network_change_notifier.h"
#include "services/tracing/public/cpp/perfetto/perfetto_config.h"
#include "services/tracing/public/cpp/perfetto/perfetto_traced_process.h"
#include "services/tracing/public/cpp/perfetto/trace_event_data_source.h"
#include "services/tracing/public/cpp/trace_event_agent.h"
#include "services/tracing/public/cpp/traced_process_impl.h"
#include "services/tracing/public/cpp/tracing_features.h"
#include "services/tracing/public/mojom/constants.mojom.h"
#include "third_party/icu/source/i18n/unicode/timezone.h"
#include "third_party/perfetto/include/perfetto/protozero/message.h"
#include "third_party/perfetto/protos/perfetto/trace/extension_descriptor.pbzero.h"
#include "third_party/perfetto/protos/perfetto/trace/trace_packet.pbzero.h"
#include "v8/include/v8-version-string.h"
#if BUILDFLAG(IS_CHROMEOS_ASH)
#include "chromeos/ash/components/system/statistics_provider.h"
#include "content/browser/tracing/cros_tracing_agent.h"
#endif
#if defined(CAST_TRACING_AGENT)
#include "content/browser/tracing/cast_tracing_agent.h"
#endif
#if BUILDFLAG(IS_WIN)
#include <windows.h>
#include "base/power_monitor/cpu_frequency_utils.h"
#include "base/win/registry.h"
#include "base/win/win_util.h"
#include "base/win/windows_version.h"
#endif
#if BUILDFLAG(IS_ANDROID)
#include <sys/time.h>
#include "base/debug/elf_reader.h"
#include "content/browser/android/tracing_controller_android.h"
#include "services/tracing/public/cpp/perfetto/java_heap_profiler/java_heap_profiler_android.h"
// Symbol with virtual address of the start of ELF header of the current binary.
extern char __ehdr_start;
#endif // BUILDFLAG(IS_ANDROID)
namespace content {
namespace {
TracingControllerImpl* g_tracing_controller = nullptr;
std::string GetNetworkTypeString() {
switch (net::NetworkChangeNotifier::GetConnectionType()) {
case net::NetworkChangeNotifier::CONNECTION_ETHERNET:
return "Ethernet";
case net::NetworkChangeNotifier::CONNECTION_WIFI:
return "WiFi";
case net::NetworkChangeNotifier::CONNECTION_2G:
return "2G";
case net::NetworkChangeNotifier::CONNECTION_3G:
return "3G";
case net::NetworkChangeNotifier::CONNECTION_4G:
return "4G";
case net::NetworkChangeNotifier::CONNECTION_5G:
return "5G";
case net::NetworkChangeNotifier::CONNECTION_NONE:
return "None";
case net::NetworkChangeNotifier::CONNECTION_BLUETOOTH:
return "Bluetooth";
case net::NetworkChangeNotifier::CONNECTION_UNKNOWN:
default:
break;
}
return "Unknown";
}
std::string GetClockString() {
switch (base::TimeTicks::GetClock()) {
case base::TimeTicks::Clock::FUCHSIA_ZX_CLOCK_MONOTONIC:
return "FUCHSIA_ZX_CLOCK_MONOTONIC";
case base::TimeTicks::Clock::LINUX_CLOCK_MONOTONIC:
return "LINUX_CLOCK_MONOTONIC";
case base::TimeTicks::Clock::IOS_CF_ABSOLUTE_TIME_MINUS_KERN_BOOTTIME:
return "IOS_CF_ABSOLUTE_TIME_MINUS_KERN_BOOTTIME";
case base::TimeTicks::Clock::MAC_MACH_ABSOLUTE_TIME:
return "MAC_MACH_ABSOLUTE_TIME";
case base::TimeTicks::Clock::WIN_QPC:
return "WIN_QPC";
case base::TimeTicks::Clock::WIN_ROLLOVER_PROTECTED_TIME_GET_TIME:
return "WIN_ROLLOVER_PROTECTED_TIME_GET_TIME";
}
NOTREACHED_IN_MIGRATION();
return std::string();
}
#if BUILDFLAG(IS_ANDROID)
int64_t ConvertTimespecToMicros(const struct timespec& ts) {
// On 32-bit systems, the calculation cannot overflow int64_t.
// 2**32 * 1000000 + 2**64 / 1000 < 2**63
if (sizeof(ts.tv_sec) <= 4 && sizeof(ts.tv_nsec) <= 8) {
int64_t result = ts.tv_sec;
result *= base::Time::kMicrosecondsPerSecond;
result += (ts.tv_nsec / base::Time::kNanosecondsPerMicrosecond);
return result;
}
base::CheckedNumeric<int64_t> result(ts.tv_sec);
result *= base::Time::kMicrosecondsPerSecond;
result += (ts.tv_nsec / base::Time::kNanosecondsPerMicrosecond);
return result.ValueOrDie();
}
// This returns the offset between the monotonic clock and the realtime clock.
// We could read btime from /proc/status files; however, btime can be off by
// around 1s, which is too much. The following method should give us a better
// approximation of the offset.
std::string GetClockOffsetSinceEpoch() {
struct timespec realtime_before, monotonic, realtime_after;
clock_gettime(CLOCK_REALTIME, &realtime_before);
clock_gettime(CLOCK_MONOTONIC, &monotonic);
clock_gettime(CLOCK_REALTIME, &realtime_after);
return base::NumberToString(ConvertTimespecToMicros(realtime_before) / 2 +
ConvertTimespecToMicros(realtime_after) / 2 -
ConvertTimespecToMicros(monotonic));
}
#endif
bool IsSpecialCategory(const std::string& name) {
return name == "__metadata" || name == "tracing_already_shutdown" ||
name == "tracing_categories_exhausted._must_increase_kMaxCategories";
}
} // namespace
TracingController* TracingController::GetInstance() {
return TracingControllerImpl::GetInstance();
}
TracingControllerImpl::TracingControllerImpl() {
DCHECK(!g_tracing_controller);
DCHECK_CURRENTLY_ON(BrowserThread::UI);
// Deliberately leaked, like this class.
base::FileTracing::SetProvider(new FileTracingProviderImpl);
AddAgents();
g_tracing_controller = this;
#if BUILDFLAG(IS_CHROMEOS_ASH)
// Bind hwclass once the statistics are available.
ash::system::StatisticsProvider::GetInstance()
->ScheduleOnMachineStatisticsLoaded(
base::BindOnce(&TracingControllerImpl::OnMachineStatisticsLoaded,
weak_ptr_factory_.GetWeakPtr()));
#endif
tracing::PerfettoTracedProcess::Get()->SetConsumerConnectionFactory(
&GetTracingService, base::SingleThreadTaskRunner::GetCurrentDefault());
}
TracingControllerImpl::~TracingControllerImpl() = default;
void TracingControllerImpl::AddAgents() {
tracing::TracedProcessImpl::GetInstance()->SetTaskRunner(
base::SequencedTaskRunner::GetCurrentDefault());
#if BUILDFLAG(IS_CHROMEOS_ASH)
agents_.push_back(std::make_unique<CrOSTracingAgent>());
#elif defined(CAST_TRACING_AGENT)
agents_.push_back(std::make_unique<CastTracingAgent>());
#endif
// Ensure the TraceEventAgent has been created.
tracing::TraceEventAgent::GetInstance();
// For adding general CPU, network, OS, and other system information to the
// metadata.
auto* metadata_source = tracing::TraceEventMetadataSource::GetInstance();
metadata_source->AddGeneratorFunction(base::BindRepeating(
&TracingControllerImpl::GenerateMetadataDict, base::Unretained(this)));
metadata_source->AddGeneratorFunction(base::BindRepeating(
&TracingControllerImpl::GenerateMetadataPacketFieldTrials,
base::Unretained(this)));
metadata_source->AddGeneratorFunction(base::BindRepeating(
&TracingControllerImpl::GenerateMetadataPacket, base::Unretained(this)));
#if BUILDFLAG(IS_ANDROID)
tracing::PerfettoTracedProcess::Get()->AddDataSource(
tracing::JavaHeapProfiler::GetInstance());
#endif
}
void TracingControllerImpl::GenerateMetadataPacketFieldTrials(
perfetto::protos::pbzero::ChromeMetadataPacket* metadata_proto,
bool privacy_filtering_enabled) {
// Do not include low anonymity field trials, to prevent them from being
// included in chrometto reports.
std::vector<variations::ActiveGroupId> active_group_ids;
variations::GetFieldTrialActiveGroupIds(std::string_view(),
&active_group_ids);
for (const auto& active_group_id : active_group_ids) {
perfetto::protos::pbzero::ChromeMetadataPacket::FinchHash* finch_hash =
metadata_proto->add_field_trial_hashes();
finch_hash->set_name(active_group_id.name);
finch_hash->set_group(active_group_id.group);
}
}
void TracingControllerImpl::ConnectToServiceIfNeeded() {
if (!consumer_host_) {
GetTracingService().BindConsumerHost(
consumer_host_.BindNewPipeAndPassReceiver());
consumer_host_.reset_on_disconnect();
}
}
void TracingControllerImpl::GenerateMetadataPacket(
perfetto::protos::pbzero::TracePacket* handle,
bool privacy_filtering_enabled) {
if (privacy_filtering_enabled)
return;
auto* extension_descriptor = handle->BeginNestedMessage<protozero::Message>(
perfetto::protos::pbzero::TracePacket::kExtensionDescriptorFieldNumber);
scoped_refptr<base::RefCountedMemory> descriptor_bytes(
GetContentClient()->GetDataResourceBytes(chrome_track_event_descriptor));
if (!descriptor_bytes)
return;
extension_descriptor->AppendBytes(
perfetto::protos::pbzero::ExtensionDescriptor::kExtensionSetFieldNumber,
descriptor_bytes->data(), descriptor_bytes->size());
}
// Can be called on any thread.
std::optional<base::Value::Dict> TracingControllerImpl::GenerateMetadataDict() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
auto metadata_dict =
base::Value::Dict()
.Set("network-type", GetNetworkTypeString())
.Set("product-version", GetContentClient()->browser()->GetProduct())
.Set("v8-version", V8_VERSION_STRING)
.Set("user-agent", GetContentClient()->browser()->GetUserAgent())
.Set("revision", version_info::GetLastChange());
#if BUILDFLAG(IS_ANDROID)
// The library name is used for symbolizing heap profiles. This cannot be
// obtained from process maps since library can be mapped from apk directly.
// This is not added as part of memory-infra os dumps since it is special case
// only for chrome library.
std::optional<std::string_view> soname =
base::debug::ReadElfLibraryName(&__ehdr_start);
if (soname)
metadata_dict.Set("chrome-library-name", *soname);
metadata_dict.Set("clock-offset-since-epoch", GetClockOffsetSinceEpoch());
#endif // BUILDFLAG(IS_ANDROID)
metadata_dict.Set("chrome-bitness", static_cast<int>(8 * sizeof(uintptr_t)));
#if DCHECK_IS_ON()
metadata_dict.Set("chrome-dcheck-on", 1);
#endif
// OS
#if BUILDFLAG(IS_CHROMEOS_ASH)
metadata_dict.Set("os-name", "CrOS");
if (are_statistics_loaded_)
metadata_dict.Set("hardware-class", hardware_class_);
#else
metadata_dict.Set("os-name", base::SysInfo::OperatingSystemName());
#endif // BUILDFLAG(IS_CHROMEOS_ASH)
metadata_dict.Set("os-version", base::SysInfo::OperatingSystemVersion());
#if BUILDFLAG(IS_WIN)
if (base::win::OSInfo::GetArchitecture() ==
base::win::OSInfo::X64_ARCHITECTURE) {
if (base::win::OSInfo::GetInstance()->IsWowX86OnAMD64()) {
metadata_dict.Set("os-wow64", "enabled");
} else {
metadata_dict.Set("os-wow64", "disabled");
}
}
metadata_dict.Set("module-apphelp", (::GetModuleHandle(L"apphelp.dll"))
? "Loaded"
: "NotLoaded");
metadata_dict.Set("os-session",
base::win::IsCurrentSessionRemote() ? "remote" : "local");
#endif
metadata_dict.Set("os-arch", base::SysInfo::OperatingSystemArchitecture());
// CPU
base::CPU cpu;
metadata_dict.Set("cpu-family", cpu.family());
metadata_dict.Set("cpu-model", cpu.model());
metadata_dict.Set("cpu-stepping", cpu.stepping());
metadata_dict.Set("num-cpus", base::SysInfo::NumberOfProcessors());
metadata_dict.Set("physical-memory",
base::SysInfo::AmountOfPhysicalMemoryMB());
metadata_dict.Set("cpu-brand", cpu.cpu_brand());
#if BUILDFLAG(IS_WIN)
base::GenerateCpuInfoForTracingMetadata(&metadata_dict);
#endif
// GPU
const gpu::GPUInfo gpu_info =
content::GpuDataManagerImpl::GetInstance()->GetGPUInfo();
const gpu::GPUInfo::GPUDevice& active_gpu = gpu_info.active_gpu();
#if !BUILDFLAG(IS_ANDROID)
metadata_dict.Set("gpu-venid", static_cast<int>(active_gpu.vendor_id));
metadata_dict.Set("gpu-devid", static_cast<int>(active_gpu.device_id));
#endif
metadata_dict.Set("gpu-driver", active_gpu.driver_version);
metadata_dict.Set("gpu-psver", gpu_info.pixel_shader_version);
metadata_dict.Set("gpu-vsver", gpu_info.vertex_shader_version);
#if BUILDFLAG(IS_MAC)
metadata_dict.Set("gpu-glver", gpu_info.gl_version);
#elif BUILDFLAG(IS_POSIX)
metadata_dict.Set("gpu-gl-vendor", gpu_info.gl_vendor);
metadata_dict.Set("gpu-gl-renderer", gpu_info.gl_renderer);
#endif
metadata_dict.Set("gpu-features", GetFeatureStatus());
metadata_dict.Set("clock-domain", GetClockString());
metadata_dict.Set("highres-ticks", base::TimeTicks::IsHighResolution());
base::CommandLine::StringType command_line =
base::CommandLine::ForCurrentProcess()->GetCommandLineString();
#if BUILDFLAG(IS_WIN)
metadata_dict.Set("command_line", base::WideToUTF16(command_line));
#else
metadata_dict.Set("command_line", command_line);
#endif
metadata_dict.Set(
"trace-capture-datetime",
base::UnlocalizedTimeFormatWithPattern(TRACE_TIME_NOW(), "y-M-d H:m:s",
icu::TimeZone::getGMT()));
// TODO(crbug.com/40527661): The central controller doesn't know about
// metadata filters, so we temporarily filter here as the controller is
// what assembles the full trace data.
base::trace_event::MetadataFilterPredicate metadata_filter;
if (trace_config_ && trace_config_->IsArgumentFilterEnabled()) {
metadata_filter = base::trace_event::TraceLog::GetInstance()
->GetMetadataFilterPredicate();
}
if (!metadata_filter.is_null()) {
for (auto it : metadata_dict) {
if (!metadata_filter.Run(it.first)) {
it.second = base::Value("__stripped__");
}
}
}
return metadata_dict;
}
TracingControllerImpl* TracingControllerImpl::GetInstance() {
DCHECK(g_tracing_controller);
return g_tracing_controller;
}
bool TracingControllerImpl::GetCategories(GetCategoriesDoneCallback callback) {
std::set<std::string> category_set;
using base::perfetto_track_event::internal::kCategoryRegistry;
for (size_t i = 0; i < kCategoryRegistry.category_count(); ++i) {
std::string category_name = kCategoryRegistry.GetCategory(i)->name;
// Only add single categories, not groups. Also exclude special categories.
if (category_name.find(',') == std::string::npos &&
!IsSpecialCategory(category_name)) {
category_set.insert(category_name);
}
}
std::move(callback).Run(category_set);
return true;
}
bool TracingControllerImpl::StartTracing(
const base::trace_event::TraceConfig& trace_config,
StartTracingDoneCallback callback) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
// TODO(chiniforooshan): The actual value should be received by callback and
// this function should return void.
if (IsTracing()) {
// Do not allow updating trace config when process filter is not used.
if (trace_config.process_filter_config().empty() ||
trace_config_->process_filter_config().empty()) {
return false;
}
// Make sure other parts of trace_config (besides process filter)
// did not change.
base::trace_event::TraceConfig old_config_copy(*trace_config_);
base::trace_event::TraceConfig new_config_copy(trace_config);
old_config_copy.SetProcessFilterConfig(
base::trace_event::TraceConfig::ProcessFilterConfig());
new_config_copy.SetProcessFilterConfig(
base::trace_event::TraceConfig::ProcessFilterConfig());
if (old_config_copy.ToString() != new_config_copy.ToString())
return false;
}
trace_config_ =
std::make_unique<base::trace_event::TraceConfig>(trace_config);
DCHECK(!tracing_session_host_);
ConnectToServiceIfNeeded();
perfetto::TraceConfig perfetto_config = tracing::GetDefaultPerfettoConfig(
trace_config,
/*privacy_filtering_enabled=*/false,
/*convert_to_legacy_json=*/true,
perfetto::protos::gen::ChromeConfig::USER_INITIATED);
consumer_host_->EnableTracing(
tracing_session_host_.BindNewPipeAndPassReceiver(),
receiver_.BindNewPipeAndPassRemote(), std::move(perfetto_config),
base::File());
receiver_.set_disconnect_handler(base::BindOnce(
&TracingControllerImpl::OnTracingFailed, base::Unretained(this)));
tracing_session_host_.set_disconnect_handler(base::BindOnce(
&TracingControllerImpl::OnTracingFailed, base::Unretained(this)));
start_tracing_callback_ = std::move(callback);
// TODO(chiniforooshan): The actual success value should be sent by the
// callback asynchronously.
return true;
}
bool TracingControllerImpl::StopTracing(
const scoped_refptr<TraceDataEndpoint>& trace_data_endpoint) {
return StopTracing(std::move(trace_data_endpoint), "");
}
bool TracingControllerImpl::StopTracing(
const scoped_refptr<TraceDataEndpoint>& trace_data_endpoint,
const std::string& agent_label,
bool privacy_filtering_enabled) {
if (!IsTracing() || drainer_ || !tracing_session_host_)
return false;
DCHECK_CURRENTLY_ON(BrowserThread::UI);
// Setting the argument filter is no longer supported just in the TraceConfig;
// clients of the TracingController that need filtering need to pass that
// option to StopTracing directly as an argument. This is due to Perfetto-
// based tracing requiring this filtering to be done during serialization
// time and not during tracing time.
// TODO(oysteine): Remove the config option once the legacy IPC layer is
// removed.
CHECK(privacy_filtering_enabled || !trace_config_->IsArgumentFilterEnabled());
trace_data_endpoint_ = std::move(trace_data_endpoint);
is_data_complete_ = false;
read_buffers_complete_ = false;
mojo::ScopedDataPipeProducerHandle producer_handle;
mojo::ScopedDataPipeConsumerHandle consumer_handle;
MojoResult result =
mojo::CreateDataPipe(nullptr, producer_handle, consumer_handle);
if (result != MOJO_RESULT_OK) {
CompleteFlush();
return true;
}
drainer_ =
std::make_unique<mojo::DataPipeDrainer>(this, std::move(consumer_handle));
tracing_session_host_->DisableTracingAndEmitJson(
agent_label, std::move(producer_handle), privacy_filtering_enabled,
base::BindOnce(&TracingControllerImpl::OnReadBuffersComplete,
base::Unretained(this)));
// TODO(chiniforooshan): Is the return value used anywhere?
return true;
}
bool TracingControllerImpl::GetTraceBufferUsage(
GetTraceBufferUsageCallback callback) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (!tracing_session_host_) {
std::move(callback).Run(0.0, 0);
return true;
}
tracing_session_host_->RequestBufferUsage(base::BindOnce(
[](GetTraceBufferUsageCallback callback, bool success, float percent_full,
bool data_loss) { std::move(callback).Run(percent_full, 0); },
std::move(callback)));
// TODO(chiniforooshan): The actual success value should be sent by the
// callback asynchronously.
return true;
}
bool TracingControllerImpl::IsTracing() {
return trace_config_ != nullptr;
}
void TracingControllerImpl::OnTracingEnabled() {
if (start_tracing_callback_)
std::move(start_tracing_callback_).Run();
}
void TracingControllerImpl::OnTracingDisabled(bool) {}
void TracingControllerImpl::OnTracingFailed() {
CompleteFlush();
}
void TracingControllerImpl::OnDataAvailable(base::span<const uint8_t> data) {
if (trace_data_endpoint_) {
const std::string chunk(base::as_string_view(data));
trace_data_endpoint_->ReceiveTraceChunk(
std::make_unique<std::string>(chunk));
}
}
void TracingControllerImpl::CompleteFlush() {
if (trace_data_endpoint_)
trace_data_endpoint_->ReceivedTraceFinalContents();
trace_data_endpoint_ = nullptr;
trace_config_ = nullptr;
drainer_ = nullptr;
tracing_session_host_.reset();
receiver_.reset();
}
void TracingControllerImpl::OnDataComplete() {
is_data_complete_ = true;
if (read_buffers_complete_)
CompleteFlush();
}
void TracingControllerImpl::OnReadBuffersComplete() {
read_buffers_complete_ = true;
if (is_data_complete_)
CompleteFlush();
}
#if BUILDFLAG(IS_CHROMEOS_ASH)
void TracingControllerImpl::OnMachineStatisticsLoaded() {
if (const std::optional<std::string_view> hardware_class =
ash::system::StatisticsProvider::GetInstance()->GetMachineStatistic(
ash::system::kHardwareClassKey)) {
hardware_class_ = std::string(hardware_class.value());
}
are_statistics_loaded_ = true;
}
#endif
} // namespace content