Bug 1726737 - Part 12: Add public header for telemetry timers. r=arai

Uses "TelemetryTimers.h" as the file name instead of just "Timers.h", so it's
more easy to see that this functionality isn't related to `WindowTimers` or other
date-time related things.

Differential Revision: https://phabricator.services.mozilla.com/D123203

js/public/TelemetryTimers.h

@@ -0,0 +1,34 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * 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/. */
+
+#ifndef js_TelemetryTimers_h
+#define js_TelemetryTimers_h
+
+#include "mozilla/TimeStamp.h"
+
+#include "jstypes.h"
+
+struct JS_PUBLIC_API JSContext;
+
+namespace JS {
+
+/** Timing information for telemetry purposes **/
+struct JSTimers {
+  mozilla::TimeDuration executionTime;       // Total time spent executing
+  mozilla::TimeDuration delazificationTime;  // Total time spent delazifying
+  mozilla::TimeDuration xdrEncodingTime;     // Total time spent XDR encoding
+  mozilla::TimeDuration gcTime;              // Total time spent in GC
+  mozilla::TimeDuration
+      protectTime;  // Total time spent protecting JIT executable memory
+  mozilla::TimeDuration
+      baselineCompileTime;  // Total time spent in baseline compiler
+};
+
+extern JS_PUBLIC_API JSTimers GetJSTimers(JSContext* cx);
+
+}  // namespace JS
+
+#endif  // js_TelemetryTimers_h

js/src/jsapi.cpp

@@ -63,6 +63,7 @@
 #include "js/StreamConsumer.h"
 #include "js/String.h"  // JS::MaxStringLength
 #include "js/Symbol.h"
+#include "js/TelemetryTimers.h"
 #include "js/Utility.h"
 #include "js/WaitCallbacks.h"
 #include "js/WasmModule.h"

js/src/jsapi.h

@@ -58,6 +58,7 @@
 #include "js/Stack.h"
 #include "js/StreamConsumer.h"
 #include "js/String.h"
+#include "js/TelemetryTimers.h"
 #include "js/TracingAPI.h"
 #include "js/Transcoding.h"
 #include "js/UniquePtr.h"
@@ -140,20 +141,6 @@ namespace JS {
 
 extern JS_PUBLIC_API const char* InformalValueTypeName(const JS::Value& v);
 
-/** Timing information for telemetry purposes **/
-struct JSTimers {
-  mozilla::TimeDuration executionTime;       // Total time spent executing
-  mozilla::TimeDuration delazificationTime;  // Total time spent delazifying
-  mozilla::TimeDuration xdrEncodingTime;     // Total time spent XDR encoding
-  mozilla::TimeDuration gcTime;              // Total time spent in GC
-  mozilla::TimeDuration
-      protectTime;  // Total time spent protecting JIT executable memory
-  mozilla::TimeDuration
-      baselineCompileTime;  // Total time spent in baseline compiler
-};
-
-extern JS_PUBLIC_API JSTimers GetJSTimers(JSContext* cx);
-
 } /* namespace JS */
 
 /** True iff fun is the global eval function. */

js/src/moz.build

@@ -206,6 +206,7 @@ EXPORTS.js += [
     "../public/StructuredClone.h",
     "../public/SweepingAPI.h",
     "../public/Symbol.h",
+    "../public/TelemetryTimers.h",
     "../public/TraceKind.h",
     "../public/TraceLoggerAPI.h",
     "../public/TracingAPI.h",

js/src/vm/Realm.h

@@ -23,6 +23,7 @@
 #include "builtin/Array.h"
 #include "gc/Barrier.h"
 #include "js/GCVariant.h"
+#include "js/TelemetryTimers.h"
 #include "js/UniquePtr.h"
 #include "vm/ArrayBufferObject.h"
 #include "vm/Compartment.h"