fix(core): Attach debug_meta to Hermes JS error events via Debug ID lookup

CHANGELOG.md

@@ -25,6 +25,10 @@
 
   Apps on the Old Architecture now get the same aggregate, span attribution and slow call breadcrumbs as TurboModules. An `arch: 'new' | 'legacy'` field distinguishes the two sources. Opt in with `turboModuleContextIntegration({ enableLegacyNativeModules: true })`.
 
+### Fixes
+
+- Attach `debug_meta` to JS error events on Hermes when the Debug ID stack match fails ([#6545](https://github.com/getsentry/sentry-react-native/pull/6545))
+
 ### Dependencies
 
 - Bump Android SDK from v8.50.1 to v8.51.0 ([#6539](https://github.com/getsentry/sentry-react-native/pull/6539))

packages/core/etc/sentry-react-native.api.md

@@ -210,6 +210,9 @@ export function createTimeToInitialDisplay(input: {
     useFocusEffect: (callback: () => void) => void;
 }): React_2.ComponentType<TimeToDisplayProps>;
 
+// @public
+export const debugMetaIntegration: () => Integration;
+
 // @public
 export const debugSymbolicatorIntegration: () => Integration;
 

packages/core/src/js/integrations/debugmeta.ts

@@ -0,0 +1,81 @@
+import type { Event, Integration } from '@sentry/core';
+
+import { getDebugMetadata } from '../profiling/debugid';
+
+const INTEGRATION_NAME = 'DebugMeta';
+
+/**
+ * Adds `debug_meta.images` to error events based on the Debug ID injected by
+ * Metro (`_sentryDebugIds`).
+ *
+ * React Native (Hermes) ships a single JS bundle per platform with a canonical
+ * `code_file` (`app:///index.android.bundle` / `app:///main.jsbundle`). This
+ * makes the direct Debug ID lookup used by profiling (`getDebugMetadata`) safe
+ * to reuse for all error events.
+ *
+ * The core `prepareEvent` pipeline already attempts this via `applyDebugIds` ->
+ * `applyDebugMeta`, but that path re-parses the premodule `Error().stack` and
+ * requires an exact filename match against the exception frames, which is
+ * fragile for Hermes premodule stacks. When it fails, events ship without
+ * `debug_meta` and symbolication falls back to release + filename matching.
+ *
+ * Ordering matters: core runs `applyDebugIds` (which sets `frame.debug_id`)
+ * *before* event processors, and `applyDebugMeta` (which turns those into
+ * `debug_meta.images`) *after* them. This integration is an event processor, so
+ * to stay idempotent it detects a successful core match via `frame.debug_id`
+ * and backs off — otherwise core would append a second, identical image.
+ */
+export const debugMetaIntegration = (): Integration => {
+  return {
+    name: INTEGRATION_NAME,
+    setupOnce: () => {
+      // noop
+    },
+    processEvent,
+  };
+};
+
+function processEvent(event: Event): Event {
+  // Only error/message events carry symbolicatable JS stack traces.
+  // Transactions, profiles and other event types are handled elsewhere.
+  if (event.type !== undefined) {
+    return event;
+  }
+
+  // If core's `applyDebugIds` already matched the premodule stack, its frames
+  // carry a `debug_id` and core will stamp `debug_meta.images` itself once event
+  // processors have run. Backing off here avoids emitting a duplicate image.
+  if (hasFrameWithDebugId(event)) {
+    return event;
+  }
+
+  const images = getDebugMetadata();
+  if (!images.length) {
+    return event;
+  }
+
+  event.debug_meta = event.debug_meta || {};
+  event.debug_meta.images = event.debug_meta.images || [];
+  const existing = event.debug_meta.images;
+
+  for (const image of images) {
+    // Defensive dedupe against any image already present (e.g. from another
+    // integration) so the same bundle is never listed twice.
+    const alreadyPresent = existing.some(
+      existingImage => 'debug_id' in existingImage && existingImage.debug_id === image.debug_id,
+    );
+    if (!alreadyPresent) {
+      existing.push(image);
+    }
+  }
+
+  return event;
+}
+
+function hasFrameWithDebugId(event: Event): boolean {
+  return (
+    event.exception?.values?.some(exception =>
+      exception.stacktrace?.frames?.some(frame => frame.debug_id !== undefined),
+    ) ?? false
+  );
+}

packages/core/src/js/integrations/default.ts

@@ -16,6 +16,7 @@ import {
   browserLinkedErrorsIntegration,
   createNativeFramesIntegrations,
   createReactNativeRewriteFrames,
+  debugMetaIntegration,
   debugSymbolicatorIntegration,
   dedupeIntegration,
   deviceContextIntegration,
@@ -89,6 +90,11 @@ export function getDefaultIntegrations(options: ReactNativeClientOptions): Integ
   integrations.push(reactNativeInfoIntegration());
 
   integrations.push(createReactNativeRewriteFrames());
+  // Stamp debug_meta from the Metro-injected Debug ID. Registered after
+  // RewriteFrames so the canonical bundle filename is already in place. This
+  // backfills debug_meta for Hermes/Expo-OTA events where the core
+  // applyDebugIds path fails to match the premodule stack.
+  integrations.push(debugMetaIntegration());
 
   if (options.enableNative) {
     integrations.push(deviceContextIntegration());

packages/core/src/js/integrations/exports.ts

@@ -4,6 +4,7 @@ export { reactNativeErrorHandlersIntegration } from './reactnativeerrorhandlers'
 export { nativeLinkedErrorsIntegration } from './nativelinkederrors';
 export { nativeReleaseIntegration } from './release';
 export { eventOriginIntegration } from './eventorigin';
+export { debugMetaIntegration } from './debugmeta';
 export { sdkInfoIntegration } from './sdkinfo';
 export { reactNativeInfoIntegration } from './reactnativeinfo';
 export { modulesLoaderIntegration } from './modulesloader';

packages/core/test/integrations/debugmeta.test.ts

@@ -0,0 +1,174 @@
+jest.mock('../../src/js/profiling/debugid');
+
+import type { Client, DebugImage, Event } from '@sentry/core';
+
+import { debugMetaIntegration } from '../../src/js/integrations/debugmeta';
+import { getDebugMetadata } from '../../src/js/profiling/debugid';
+
+describe('Debug Meta integration', () => {
+  const mockedGetDebugMetadata = getDebugMetadata as jest.MockedFunction<typeof getDebugMetadata>;
+
+  const DEBUG_ID = '12345678-1234-1234-1234-1234567890ab';
+  const IMAGE: DebugImage = {
+    type: 'sourcemap',
+    code_file: 'app:///index.android.bundle',
+    debug_id: DEBUG_ID,
+  };
+
+  beforeEach(() => {
+    mockedGetDebugMetadata.mockReset();
+  });
+
+  const runIntegration = (event: Event): Event => {
+    const integration = debugMetaIntegration();
+    // processEvent is synchronous for error events
+    return integration.processEvent!(event, {}, {} as Client) as Event;
+  };
+
+  const errorEventWithFrame = (): Event => ({
+    exception: {
+      values: [{ stacktrace: { frames: [{ filename: 'app:///index.android.bundle', function: 'foo' }] } }],
+    },
+  });
+
+  describe('standalone behaviour', () => {
+    it('stamps debug_meta.images on error events when a Debug ID is present', () => {
+      // Arrange
+      mockedGetDebugMetadata.mockReturnValue([IMAGE]);
+
+      // Act
+      const event = runIntegration(errorEventWithFrame());
+
+      // Assert
+      expect(event.debug_meta?.images).toEqual([IMAGE]);
+    });
+
+    it('does not add debug_meta when no Debug ID is available', () => {
+      // Arrange
+      mockedGetDebugMetadata.mockReturnValue([]);
+
+      // Act
+      const event = runIntegration(errorEventWithFrame());
+
+      // Assert
+      expect(event.debug_meta).toBeUndefined();
+    });
+
+    it('skips non-error events (transactions, profiles)', () => {
+      // Arrange
+      mockedGetDebugMetadata.mockReturnValue([IMAGE]);
+
+      // Act
+      const event = runIntegration({ type: 'transaction' });
+
+      // Assert
+      expect(event.debug_meta).toBeUndefined();
+      expect(mockedGetDebugMetadata).not.toHaveBeenCalled();
+    });
+
+    it('backs off when a frame already carries a debug_id (core matched the stack)', () => {
+      // Arrange: core's applyDebugIds ran first and matched the premodule stack
+      mockedGetDebugMetadata.mockReturnValue([IMAGE]);
+      const event: Event = {
+        exception: {
+          values: [{ stacktrace: { frames: [{ filename: 'app:///index.android.bundle', debug_id: DEBUG_ID }] } }],
+        },
+      };
+
+      // Act
+      const processed = runIntegration(event);
+
+      // Assert: we do not stamp; core's later applyDebugMeta will handle it
+      expect(processed.debug_meta).toBeUndefined();
+    });
+
+    it('preserves unrelated pre-existing images and appends the bundle image', () => {
+      // Arrange: e.g. a native linked error already added its own image
+      mockedGetDebugMetadata.mockReturnValue([IMAGE]);
+      const nativeImage: DebugImage = {
+        type: 'macho',
+        debug_id: 'aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa',
+        image_addr: '0x0',
+      };
+      const event: Event = {
+        debug_meta: { images: [nativeImage] },
+        ...errorEventWithFrame(),
+      };
+
+      // Act
+      const processed = runIntegration(event);
+
+      // Assert
+      expect(processed.debug_meta?.images).toEqual([nativeImage, IMAGE]);
+    });
+  });
+
+  // Faithfully reproduces the core prepareEvent ordering to guard against emitting
+  // a duplicate image alongside core's own stamp:
+  //   applyDebugIds (sets frame.debug_id) -> event processors (this integration) -> applyDebugMeta (stamps images)
+  describe('core prepareEvent pipeline ordering', () => {
+    // Local stand-ins matching @sentry/core's prepareEvent behaviour. Kept in the
+    // test (not imported) because core does not export them from its public entry.
+    const coreApplyDebugIds = (event: Event, matchFilename: string | null): void => {
+      event.exception?.values?.forEach(exception => {
+        exception.stacktrace?.frames?.forEach(frame => {
+          if (frame.filename && frame.filename === matchFilename) {
+            frame.debug_id = DEBUG_ID;
+          }
+        });
+      });
+    };
+    const coreApplyDebugMeta = (event: Event): void => {
+      const map: Record<string, string> = {};
+      event.exception?.values?.forEach(exception => {
+        exception.stacktrace?.frames?.forEach(frame => {
+          if (frame.debug_id) {
+            const key = frame.abs_path || frame.filename;
+            if (key) {
+              map[key] = frame.debug_id;
+            }
+            delete frame.debug_id;
+          }
+        });
+      });
+      if (Object.keys(map).length === 0) {
+        return;
+      }
+      event.debug_meta = event.debug_meta || {};
+      event.debug_meta.images = event.debug_meta.images || [];
+      Object.entries(map).forEach(([code_file, debug_id]) => {
+        event.debug_meta!.images!.push({ type: 'sourcemap', code_file, debug_id });
+      });
+    };
+
+    it('does not duplicate the image when core successfully matches the stack', () => {
+      // Arrange
+      mockedGetDebugMetadata.mockReturnValue([IMAGE]);
+      const event = errorEventWithFrame();
+
+      // Act: core matches, then our processor runs, then core stamps debug_meta
+      coreApplyDebugIds(event, 'app:///index.android.bundle');
+      runIntegration(event);
+      coreApplyDebugMeta(event);
+
+      // Assert: exactly one image (contributed by core, not doubled by us)
+      expect(event.debug_meta?.images).toHaveLength(1);
+      expect(event.debug_meta?.images?.[0]).toMatchObject({ debug_id: DEBUG_ID, type: 'sourcemap' });
+    });
+
+    it('stamps the image exactly once when core fails to match the Hermes stack', () => {
+      // Arrange
+      mockedGetDebugMetadata.mockReturnValue([IMAGE]);
+      const event = errorEventWithFrame();
+
+      // Act: core does not match (Hermes premodule stack); our processor fills the gap
+      coreApplyDebugIds(event, null);
+      runIntegration(event);
+      coreApplyDebugMeta(event);
+
+      // Assert: exactly one image, contributed by us
+      expect(event.debug_meta?.images).toHaveLength(1);
+      expect(event.debug_meta?.images).toEqual([IMAGE]);
+    });
+  });
+});