1 files changed, 100 insertions, 0 deletions
diff --git a/toolkit/components/startup/StartupTimeline.h b/toolkit/components/startup/StartupTimeline.h
new file mode 100644
index 000000000..8a966f173
--- /dev/null
+++ b/toolkit/components/startup/StartupTimeline.h
@@ -0,0 +1,100 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifdef mozilla_StartupTimeline_Event
+mozilla_StartupTimeline_Event(PROCESS_CREATION, "process")
+mozilla_StartupTimeline_Event(START, "start")
+mozilla_StartupTimeline_Event(MAIN, "main")
+mozilla_StartupTimeline_Event(SELECT_PROFILE, "selectProfile")
+mozilla_StartupTimeline_Event(AFTER_PROFILE_LOCKED, "afterProfileLocked")
+// Record the beginning and end of startup crash detection to compare with crash stats to know whether
+// detection should be improved to start or end sooner.
+mozilla_StartupTimeline_Event(STARTUP_CRASH_DETECTION_BEGIN, "startupCrashDetectionBegin")
+mozilla_StartupTimeline_Event(STARTUP_CRASH_DETECTION_END, "startupCrashDetectionEnd")
+mozilla_StartupTimeline_Event(FIRST_PAINT, "firstPaint")
+mozilla_StartupTimeline_Event(SESSION_RESTORE_INIT, "sessionRestoreInit")
+mozilla_StartupTimeline_Event(SESSION_RESTORED, "sessionRestored")
+mozilla_StartupTimeline_Event(CREATE_TOP_LEVEL_WINDOW, "createTopLevelWindow")
+mozilla_StartupTimeline_Event(LINKER_INITIALIZED, "linkerInitialized")
+mozilla_StartupTimeline_Event(LIBRARIES_LOADED, "librariesLoaded")
+mozilla_StartupTimeline_Event(FIRST_LOAD_URI, "firstLoadURI")
+
+// The following are actually shutdown events, used to monitor the duration of shutdown
+mozilla_StartupTimeline_Event(QUIT_APPLICATION, "quitApplication")
+mozilla_StartupTimeline_Event(PROFILE_BEFORE_CHANGE, "profileBeforeChange")
+#else
+
+#ifndef mozilla_StartupTimeline
+#define mozilla_StartupTimeline
+
+#include "mozilla/TimeStamp.h"
+#include "nscore.h"
+#include "GeckoProfiler.h"
+
+#ifdef MOZ_LINKER
+extern "C" {
+/* This symbol is resolved by the custom linker. The function it resolves
+ * to dumps some statistics about the linker at the key events recorded
+ * by the startup timeline. */
+extern void __moz_linker_stats(const char *str)
+NS_VISIBILITY_DEFAULT __attribute__((weak));
+} /* extern "C" */
+#else
+
+#endif
+
+namespace mozilla {
+
+void RecordShutdownEndTimeStamp();
+void RecordShutdownStartTimeStamp();
+
+class StartupTimeline {
+public:
+  enum Event {
+    #define mozilla_StartupTimeline_Event(ev, z) ev,
+    #include "StartupTimeline.h"
+    #undef mozilla_StartupTimeline_Event
+    MAX_EVENT_ID
+  };
+
+  static TimeStamp Get(Event ev) {
+    return sStartupTimeline[ev];
+  }
+
+  static const char *Describe(Event ev) {
+    return sStartupTimelineDesc[ev];
+  }
+
+  static void Record(Event ev) {
+    PROFILER_MARKER(Describe(ev));
+    Record(ev, TimeStamp::Now());
+  }
+
+  static void Record(Event ev, TimeStamp when) {
+    sStartupTimeline[ev] = when;
+#ifdef MOZ_LINKER
+    if (__moz_linker_stats)
+      __moz_linker_stats(Describe(ev));
+#endif
+  }
+
+  static void RecordOnce(Event ev) {
+    if (!HasRecord(ev))
+      Record(ev);
+  }
+
+  static bool HasRecord(Event ev) {
+    return !sStartupTimeline[ev].IsNull();
+  }
+
+private:
+  static NS_EXTERNAL_VIS_(TimeStamp) sStartupTimeline[MAX_EVENT_ID];
+  static NS_EXTERNAL_VIS_(const char *) sStartupTimelineDesc[MAX_EVENT_ID];
+};
+
+} // namespace mozilla
+
+#endif /* mozilla_StartupTimeline */
+
+#endif /* mozilla_StartupTimeline_Event */