track when a special stack trace symbolication occurs

Author: vzaidman

front_end/core/host/RNPerfMetrics.ts

@@ -270,6 +270,17 @@ class RNPerfMetrics {
     });
   }
 
+  stackTraceParsedHermesFrame(stackTrace: string, line: string, reason: string): void {
+    this.sendEvent({
+      eventName: 'StackTraceParsedHermesFrame',
+      params: {
+        stackTrace,
+        line,
+        reason,
+      },
+    });
+  }
+
   panelShown(_panelName: string, _isLaunching?: boolean): void {
     // no-op
     // We only care about the "main" and "drawer" panels for now via panelShownInLocation(…)
@@ -443,10 +454,20 @@ export type StackTraceSymbolicationFailed = Readonly<{
   }>,
 }>;
 
+export type StackTraceParsedHermesFrame = Readonly<{
+  eventName: 'StackTraceParsedHermesFrame',
+  params: Readonly<{
+    stackTrace: string,
+    line: string,
+    reason: string,
+  }>,
+}>;
+
 export type ReactNativeChromeDevToolsEvent =
     EntrypointLoadingStartedEvent|EntrypointLoadingFinishedEvent|DebuggerReadyEvent|BrowserVisibilityChangeEvent|
     BrowserErrorEvent|RemoteDebuggingTerminatedEvent|DeveloperResourceLoadingStartedEvent|
     DeveloperResourceLoadingFinishedEvent|FuseboxSetClientMetadataStartedEvent|FuseboxSetClientMetadataFinishedEvent|
-    MemoryPanelActionStartedEvent|MemoryPanelActionFinishedEvent|PanelShownEvent|PanelClosedEvent|StackTraceSymbolicationFailed;
+    MemoryPanelActionStartedEvent|MemoryPanelActionFinishedEvent|PanelShownEvent|PanelClosedEvent|
+    StackTraceSymbolicationFailed|StackTraceParsedHermesFrame;
 
 export type DecoratedReactNativeChromeDevToolsEvent = CommonEventFields&ReactNativeChromeDevToolsEvent;

front_end/panels/console/ErrorStackParser.ts

@@ -86,6 +86,9 @@ export function parseSourcePositionsFromErrorStack(
       } else {
         linkInfos.push({line, isCallFrame});
       }
+      if (splitResult.url === 'native') {
+        Host.rnPerfMetrics.stackTraceParsedHermesFrame(stack, line, 'native frame');
+      }
       continue;
     }
     let url = parseOrScriptMatch(debuggerModel, splitResult.url);