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Unified Diff: base/debug/trace_event_android.cc

Issue 885443002: Roll Chrome into Mojo. (Closed) Base URL: https://github.com/domokit/mojo.git@master
Patch Set: Rebase to ToT mojo Created 5 years, 11 months ago
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Index: base/debug/trace_event_android.cc
diff --git a/base/debug/trace_event_android.cc b/base/debug/trace_event_android.cc
deleted file mode 100644
index f08fffca35fa766038298ae503315794ce013811..0000000000000000000000000000000000000000
--- a/base/debug/trace_event_android.cc
+++ /dev/null
@@ -1,199 +0,0 @@
-// Copyright (c) 2012 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 "base/debug/trace_event_impl.h"
-
-#include <fcntl.h>
-
-#include "base/debug/trace_event.h"
-#include "base/format_macros.h"
-#include "base/logging.h"
-#include "base/strings/stringprintf.h"
-#include "base/synchronization/waitable_event.h"
-
-namespace {
-
-int g_atrace_fd = -1;
-const char kATraceMarkerFile[] = "/sys/kernel/debug/tracing/trace_marker";
-
-void WriteEvent(
- char phase,
- const char* category_group,
- const char* name,
- unsigned long long id,
- const char** arg_names,
- const unsigned char* arg_types,
- const base::debug::TraceEvent::TraceValue* arg_values,
- const scoped_refptr<base::debug::ConvertableToTraceFormat>*
- convertable_values,
- unsigned char flags) {
- std::string out = base::StringPrintf("%c|%d|%s", phase, getpid(), name);
- if (flags & TRACE_EVENT_FLAG_HAS_ID)
- base::StringAppendF(&out, "-%" PRIx64, static_cast<uint64>(id));
- out += '|';
-
- for (int i = 0; i < base::debug::kTraceMaxNumArgs && arg_names[i]; ++i) {
- if (i)
- out += ';';
- out += arg_names[i];
- out += '=';
- std::string::size_type value_start = out.length();
- if (arg_types[i] == TRACE_VALUE_TYPE_CONVERTABLE) {
- convertable_values[i]->AppendAsTraceFormat(&out);
- } else {
- base::debug::TraceEvent::AppendValueAsJSON(
- arg_types[i], arg_values[i], &out);
- }
- // Remove the quotes which may confuse the atrace script.
- ReplaceSubstringsAfterOffset(&out, value_start, "\\\"", "'");
- ReplaceSubstringsAfterOffset(&out, value_start, "\"", "");
- // Replace chars used for separators with similar chars in the value.
- std::replace(out.begin() + value_start, out.end(), ';', ',');
- std::replace(out.begin() + value_start, out.end(), '|', '!');
- }
-
- out += '|';
- out += category_group;
- write(g_atrace_fd, out.c_str(), out.size());
-}
-
-void NoOpOutputCallback(base::WaitableEvent* complete_event,
- const scoped_refptr<base::RefCountedString>&,
- bool has_more_events) {
- if (!has_more_events)
- complete_event->Signal();
-}
-
-void EndChromeTracing(base::debug::TraceLog* trace_log,
- base::WaitableEvent* complete_event) {
- trace_log->SetDisabled();
- // Delete the buffered trace events as they have been sent to atrace.
- trace_log->Flush(base::Bind(&NoOpOutputCallback, complete_event));
-}
-
-} // namespace
-
-namespace base {
-namespace debug {
-
-// These functions support Android systrace.py when 'webview' category is
-// traced. With the new adb_profile_chrome, we may have two phases:
-// - before WebView is ready for combined tracing, we can use adb_profile_chrome
-// to trace android categories other than 'webview' and chromium categories.
-// In this way we can avoid the conflict between StartATrace/StopATrace and
-// the intents.
-// - TODO(wangxianzhu): after WebView is ready for combined tracing, remove
-// StartATrace, StopATrace and SendToATrace, and perhaps send Java traces
-// directly to atrace in trace_event_binding.cc.
-
-void TraceLog::StartATrace() {
- if (g_atrace_fd != -1)
- return;
-
- g_atrace_fd = open(kATraceMarkerFile, O_WRONLY);
- if (g_atrace_fd == -1) {
- PLOG(WARNING) << "Couldn't open " << kATraceMarkerFile;
- return;
- }
- SetEnabled(CategoryFilter(CategoryFilter::kDefaultCategoryFilterString),
- TraceLog::RECORDING_MODE,
- TraceOptions(RECORD_CONTINUOUSLY));
-}
-
-void TraceLog::StopATrace() {
- if (g_atrace_fd == -1)
- return;
-
- close(g_atrace_fd);
- g_atrace_fd = -1;
-
- // TraceLog::Flush() requires the current thread to have a message loop, but
- // this thread called from Java may not have one, so flush in another thread.
- Thread end_chrome_tracing_thread("end_chrome_tracing");
- WaitableEvent complete_event(false, false);
- end_chrome_tracing_thread.Start();
- end_chrome_tracing_thread.message_loop()->PostTask(
- FROM_HERE, base::Bind(&EndChromeTracing, Unretained(this),
- Unretained(&complete_event)));
- complete_event.Wait();
-}
-
-void TraceEvent::SendToATrace() {
- if (g_atrace_fd == -1)
- return;
-
- const char* category_group =
- TraceLog::GetCategoryGroupName(category_group_enabled_);
-
- switch (phase_) {
- case TRACE_EVENT_PHASE_BEGIN:
- WriteEvent('B', category_group, name_, id_,
- arg_names_, arg_types_, arg_values_, convertable_values_,
- flags_);
- break;
-
- case TRACE_EVENT_PHASE_COMPLETE:
- WriteEvent(duration_.ToInternalValue() == -1 ? 'B' : 'E',
- category_group, name_, id_,
- arg_names_, arg_types_, arg_values_, convertable_values_,
- flags_);
- break;
-
- case TRACE_EVENT_PHASE_END:
- // Though a single 'E' is enough, here append pid, name and
- // category_group etc. So that unpaired events can be found easily.
- WriteEvent('E', category_group, name_, id_,
- arg_names_, arg_types_, arg_values_, convertable_values_,
- flags_);
- break;
-
- case TRACE_EVENT_PHASE_INSTANT:
- // Simulate an instance event with a pair of begin/end events.
- WriteEvent('B', category_group, name_, id_,
- arg_names_, arg_types_, arg_values_, convertable_values_,
- flags_);
- write(g_atrace_fd, "E", 1);
- break;
-
- case TRACE_EVENT_PHASE_COUNTER:
- for (int i = 0; i < kTraceMaxNumArgs && arg_names_[i]; ++i) {
- DCHECK(arg_types_[i] == TRACE_VALUE_TYPE_INT);
- std::string out = base::StringPrintf(
- "C|%d|%s-%s", getpid(), name_, arg_names_[i]);
- if (flags_ & TRACE_EVENT_FLAG_HAS_ID)
- StringAppendF(&out, "-%" PRIx64, static_cast<uint64>(id_));
- StringAppendF(&out, "|%d|%s",
- static_cast<int>(arg_values_[i].as_int), category_group);
- write(g_atrace_fd, out.c_str(), out.size());
- }
- break;
-
- default:
- // Do nothing.
- break;
- }
-}
-
-void TraceLog::AddClockSyncMetadataEvent() {
- int atrace_fd = open(kATraceMarkerFile, O_WRONLY | O_APPEND);
- if (atrace_fd == -1) {
- PLOG(WARNING) << "Couldn't open " << kATraceMarkerFile;
- return;
- }
-
- // Android's kernel trace system has a trace_marker feature: this is a file on
- // debugfs that takes the written data and pushes it onto the trace
- // buffer. So, to establish clock sync, we write our monotonic clock into that
- // trace buffer.
- TimeTicks now = TimeTicks::NowFromSystemTraceTime();
- double now_in_seconds = now.ToInternalValue() / 1000000.0;
- std::string marker = StringPrintf(
- "trace_event_clock_sync: parent_ts=%f\n", now_in_seconds);
- if (write(atrace_fd, marker.c_str(), marker.size()) == -1)
- PLOG(WARNING) << "Couldn't write to " << kATraceMarkerFile;
- close(atrace_fd);
-}
-
-} // namespace debug
-} // namespace base
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