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Add --trace_event option to capture events in unit tests.

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Usage example:
  % out/head/modules_unittests --gtest_filter="MyTest" --trace_event=trace_event.json

The resulting file can be uploaded into chrome for nice visualization
(chrome://tracing).

Bug: webrtc:10926
Change-Id: I420b9dff0626126f25e993fd31c3f2622329f858
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/150647
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Commit-Queue: Yves Gerey <yvesg@google.com>
Cr-Commit-Position: refs/heads/master@{#28982}
This commit is contained in:
Yves Gerey
2019-08-28 13:24:00 +02:00
committed by Commit Bot
parent 7f65932073
commit 050e38f7c4
1 changed files with 18 additions and 0 deletions
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18
test/test_main_lib.cc
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@ -17,6 +17,7 @@
#include "absl/flags/parse.h"
#include "absl/memory/memory.h"
#include "rtc_base/checks.h"
#include "rtc_base/event_tracer.h"
#include "rtc_base/logging.h"
#include "rtc_base/ssl_adapter.h"
#include "rtc_base/ssl_stream_adapter.h"
@ -74,6 +75,12 @@ ABSL_FLAG(
ABSL_FLAG(bool, logs, true, "print logs to stderr");
ABSL_FLAG(bool, verbose, false, "verbose logs to stderr");
ABSL_FLAG(std::string,
trace_event,
"",
"Path to collect trace events (json file) for chrome://tracing. "
"If not set, events aren't captured.");
ABSL_FLAG(std::string,
force_fieldtrials,
"",
@ -102,6 +109,13 @@ class TestMainImpl : public TestMain {
rtc::LogMessage::SetLogToStderr(absl::GetFlag(FLAGS_logs) ||
absl::GetFlag(FLAGS_verbose));
std::string trace_event_path = absl::GetFlag(FLAGS_trace_event);
const bool capture_events = !trace_event_path.empty();
if (capture_events) {
rtc::tracing::SetupInternalTracer();
rtc::tracing::StartInternalCapture(trace_event_path.c_str());
}
// TODO(bugs.webrtc.org/9792): we need to reference something from
// fileutils.h so that our downstream hack where we replace fileutils.cc
// works. Otherwise the downstream flag implementation will take over and
@ -131,6 +145,10 @@ class TestMainImpl : public TestMain {
// automatically wrapped.
rtc::ThreadManager::Instance()->WrapCurrentThread();
RTC_CHECK(rtc::Thread::Current());
if (capture_events) {
rtc::tracing::StopInternalCapture();
}
return 0;
}