Add Systrace-based telemetry to Hermes GC.

Reviewed By: amnn

Differential Revision: D6393879

fbshipit-source-id: d35a4647d000356dc99bce3187acc50d3a69ddeb

Author: David Detlefs

Libraries/Performance/Systrace.js

@@ -27,7 +27,7 @@ type RelayProfiler = {
 
 /* eslint no-bitwise: 0 */
 const TRACE_TAG_REACT_APPS = 1 << 17;
-const TRACE_TAG_JSC_CALLS = 1 << 27;
+const TRACE_TAG_JS_VM_CALLS = 1 << 27;
 
 let _enabled = false;
 let _asyncCookie = 0;
@@ -155,9 +155,9 @@ const Systrace = {
     if (_enabled !== enabled) {
       if (__DEV__) {
         if (enabled) {
-          global.nativeTraceBeginLegacy && global.nativeTraceBeginLegacy(TRACE_TAG_JSC_CALLS);
+          global.nativeTraceBeginLegacy && global.nativeTraceBeginLegacy(TRACE_TAG_JS_VM_CALLS);
         } else {
-          global.nativeTraceEndLegacy && global.nativeTraceEndLegacy(TRACE_TAG_JSC_CALLS);
+          global.nativeTraceEndLegacy && global.nativeTraceEndLegacy(TRACE_TAG_JS_VM_CALLS);
         }
         if (_canInstallReactHook) {
           if (_useFiber) {

ReactAndroid/src/main/java/com/facebook/react/ReactInstanceManager.java

@@ -29,7 +29,7 @@
 import static com.facebook.react.bridge.ReactMarkerConstants.SETUP_REACT_CONTEXT_START;
 import static com.facebook.systrace.Systrace.TRACE_TAG_REACT_APPS;
 import static com.facebook.systrace.Systrace.TRACE_TAG_REACT_JAVA_BRIDGE;
-import static com.facebook.systrace.Systrace.TRACE_TAG_REACT_JSC_CALLS;
+import static com.facebook.systrace.Systrace.TRACE_TAG_REACT_JS_VM_CALLS;
 
 import android.app.Activity;
 import android.content.Context;
@@ -395,8 +395,9 @@ private void recreateReactContextInBackgroundInner() {
         .logMessage(ReactDebugOverlayTags.RN_CORE, "RNCore: recreateReactContextInBackground");
     UiThreadUtil.assertOnUiThread();
 
-    if (mUseDeveloperSupport && mJSMainModulePath != null &&
-      !Systrace.isTracing(TRACE_TAG_REACT_APPS | TRACE_TAG_REACT_JSC_CALLS)) {
+    if (mUseDeveloperSupport
+        && mJSMainModulePath != null
+        && !Systrace.isTracing(TRACE_TAG_REACT_APPS | TRACE_TAG_REACT_JS_VM_CALLS)) {
       final DeveloperSettings devSettings = mDevSupportManager.getDevSettings();
 
       // If remote JS debugging is enabled, load from dev server.
@@ -1094,7 +1095,7 @@ private ReactApplicationContext createReactContext(
     if (mBridgeIdleDebugListener != null) {
       catalystInstance.addBridgeIdleDebugListener(mBridgeIdleDebugListener);
     }
-    if (Systrace.isTracing(TRACE_TAG_REACT_APPS | TRACE_TAG_REACT_JSC_CALLS)) {
+    if (Systrace.isTracing(TRACE_TAG_REACT_APPS | TRACE_TAG_REACT_JS_VM_CALLS)) {
       catalystInstance.setGlobalVariable("__RCTProfileIsProfiling", "true");
     }
     ReactMarker.logMarker(ReactMarkerConstants.PRE_RUN_JS_BUNDLE_START);

ReactAndroid/src/main/java/com/facebook/systrace/Systrace.java

@@ -22,7 +22,7 @@ public class Systrace {
   public static final long TRACE_TAG_REACT_APPS = 0L;
   public static final long TRACE_TAG_REACT_FRESCO = 0L;
   public static final long TRACE_TAG_REACT_VIEW = 0L;
-  public static final long TRACE_TAG_REACT_JSC_CALLS = 0L;
+  public static final long TRACE_TAG_REACT_JS_VM_CALLS = 0L;
 
   public enum EventScope {
     THREAD('t'),