[Startup Tracing] Separate TraceOptions and CategoryFilter

base/trace_event/trace_options.cc

+// Copyright (c) 2015 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/trace_event/trace_options.h"
+
+#include "base/logging.h"
+#include "base/strings/string_split.h"
+
+namespace base {
+namespace trace_event {
+
+namespace {
+
+// String options that can be used to initialize TraceOptions.
+const char kRecordUntilFull[] = "record-until-full";
+const char kRecordContinuously[] = "record-continuously";
+const char kRecordAsMuchAsPossible[] = "record-as-much-as-possible";
+const char kTraceToConsole[] = "trace-to-console";
+const char kEnableSampling[] = "enable-sampling";
+const char kEnableSystrace[] = "enable-systrace";
+const char kEnableArgumentFilter[] = "enable-argument-filter";
+
+}  // namespace
+
+bool TraceOptions::SetFromString(const std::string& options_string) {
+  record_mode = RECORD_UNTIL_FULL;
+  enable_sampling = false;
+  enable_systrace = false;
+
+  std::vector<std::string> split;
+  std::vector<std::string>::iterator iter;
+  base::SplitString(options_string, ',', &split);
+  for (iter = split.begin(); iter != split.end(); ++iter) {
+    if (*iter == kRecordUntilFull) {
+      record_mode = RECORD_UNTIL_FULL;
+    } else if (*iter == kRecordContinuously) {
+      record_mode = RECORD_CONTINUOUSLY;
+    } else if (*iter == kTraceToConsole) {
+      record_mode = ECHO_TO_CONSOLE;
+    } else if (*iter == kRecordAsMuchAsPossible) {
+      record_mode = RECORD_AS_MUCH_AS_POSSIBLE;
+    } else if (*iter == kEnableSampling) {
+      enable_sampling = true;
+    } else if (*iter == kEnableSystrace) {
+      enable_systrace = true;
+    } else if (*iter == kEnableArgumentFilter) {
+      enable_argument_filter = true;
+    } else {
+      return false;
+    }
+  }
+  return true;
+}
+
+std::string TraceOptions::ToString() const {
+  std::string ret;
+  switch (record_mode) {
+    case RECORD_UNTIL_FULL:
+      ret = kRecordUntilFull;
+      break;
+    case RECORD_CONTINUOUSLY:
+      ret = kRecordContinuously;
+      break;
+    case ECHO_TO_CONSOLE:
+      ret = kTraceToConsole;
+      break;
+    case RECORD_AS_MUCH_AS_POSSIBLE:
+      ret = kRecordAsMuchAsPossible;
+      break;
+    default:
+      NOTREACHED();
+  }
+  if (enable_sampling)
+    ret = ret + "," + kEnableSampling;
+  if (enable_systrace)
+    ret = ret + "," + kEnableSystrace;
+  if (enable_argument_filter)
+    ret = ret + "," + kEnableArgumentFilter;
+  return ret;
+}
+
+}  // namespace trace_event
+}  // namespace base