feat(crashlytics, android): Support deferred component crash stack trace

packages/firebase_crashlytics/firebase_crashlytics/android/src/main/java/com/google/firebase/crashlytics/FlutterFirebaseCrashlyticsInternal.java

@@ -8,10 +8,12 @@
 
 import android.annotation.SuppressLint;
 import com.google.firebase.crashlytics.internal.Logger;
+import java.util.List;
 
 /** @hide */
 public final class FlutterFirebaseCrashlyticsInternal {
-  private static final String FLUTTER_BUILD_ID_KEY = "com.crashlytics.flutter.build-id.0";
+  private static final String LOADING_UNIT_KEY = "com.crashlytics.flutter.build-id.";
+  private static final String FLUTTER_BUILD_ID_DEFAULT_KEY = LOADING_UNIT_KEY + 0;
 
   @SuppressLint("VisibleForTests")
   public static void recordFatalException(Throwable throwable) {
@@ -24,7 +26,16 @@ public static void recordFatalException(Throwable throwable) {
 
   @SuppressLint("VisibleForTests")
   public static void setFlutterBuildId(String buildId) {
-    FirebaseCrashlytics.getInstance().core.setInternalKey(FLUTTER_BUILD_ID_KEY, buildId);
+    FirebaseCrashlytics.getInstance().core.setInternalKey(FLUTTER_BUILD_ID_DEFAULT_KEY, buildId);
+  }
+
+  @SuppressLint("VisibleForTests")
+  public static void setLoadingUnits(List<String> loadingUnits) {
+    int unit = 0;
+    for (String loadingUnit : loadingUnits) {
+      unit++;
+      FirebaseCrashlytics.getInstance().core.setInternalKey(LOADING_UNIT_KEY + unit, loadingUnit);
+    }
   }
 
   private FlutterFirebaseCrashlyticsInternal() {}

packages/firebase_crashlytics/firebase_crashlytics/android/src/main/java/io/flutter/plugins/firebase/crashlytics/Constants.java

@@ -27,6 +27,7 @@ public class Constants {
   public static final String IS_CRASHLYTICS_COLLECTION_ENABLED = "isCrashlyticsCollectionEnabled";
   public static final String FATAL = "fatal";
   public static final String BUILD_ID = "buildId";
+  public static final String LOADING_UNITS = "loadingUnits";
   public static final String TIMESTAMP = "timestamp";
   public static final String FIREBASE_APPLICATION_EXCEPTION = "_ae";
   public static final String CRASH_EVENT_KEY = "com.firebase.crashlytics.flutter.fatal";

packages/firebase_crashlytics/firebase_crashlytics/android/src/main/java/io/flutter/plugins/firebase/crashlytics/FlutterFirebaseCrashlyticsPlugin.java

@@ -148,11 +148,15 @@ private Task<Void> recordError(final Map<String, Object> arguments) {
             final boolean fatal = (boolean) Objects.requireNonNull(arguments.get(Constants.FATAL));
             final String buildId =
                 (String) Objects.requireNonNull(arguments.get(Constants.BUILD_ID));
+            final List<String> loadingUnits =
+                (List<String>) Objects.requireNonNull(arguments.get(Constants.LOADING_UNITS));
 
             if (buildId.length() > 0) {
               FlutterFirebaseCrashlyticsInternal.setFlutterBuildId(buildId);
             }
 
+            FlutterFirebaseCrashlyticsInternal.setLoadingUnits(loadingUnits);
+
             Exception exception;
             if (reason != null) {
               // Set a "reason" (to match iOS) to show where the exception was thrown.

packages/firebase_crashlytics/firebase_crashlytics/lib/src/firebase_crashlytics.dart

@@ -123,13 +123,15 @@ class FirebaseCrashlytics extends FirebasePluginPlatform {
     final List<Map<String, String>> stackTraceElements =
         getStackTraceElements(stackTrace);
     final String? buildId = getBuildId(stackTrace);
+    final List<String> loadingUnits = getLoadingUnits(stackTrace);
 
     return _delegate.recordError(
       exception: exception.toString(),
       reason: reason?.toString(),
       information: _information,
       stackTraceElements: stackTraceElements,
       buildId: buildId,
+      loadingUnits: loadingUnits,
       fatal: fatal,
     );
   }

packages/firebase_crashlytics/firebase_crashlytics/lib/src/utils.dart

@@ -64,3 +64,12 @@ String? getBuildId(StackTrace stackTrace) {
 
   return null;
 }
+
+List<String> getLoadingUnits(StackTrace stackTrace) =>
+    Trace.parseVM(stackTrace.toString())
+        .terse
+        .frames
+        .whereType<UnparsedFrame>()
+        .map((frame) => frame.member)
+        .where((member) => member.startsWith('loading_unit: '))
+        .toList();

packages/firebase_crashlytics/firebase_crashlytics/test/firebase_crashlytics_test.dart

@@ -79,6 +79,7 @@ void main() {
             'fatal': false,
             'stackTraceElements': getStackTraceElements(stack),
             'buildId': '',
+            'loadingUnits': [],
           })
         ]);
         // Confirm that the stack trace contains current stack.
@@ -141,6 +142,7 @@ void main() {
             'information': '$exceptionFirstMessage\n$exceptionSecondMessage',
             'stackTraceElements': getStackTraceElements(stack),
             'buildId': '',
+            'loadingUnits': [],
           })
         ]);
       } finally {

packages/firebase_crashlytics/firebase_crashlytics_platform_interface/lib/src/method_channel/method_channel_crashlytics.dart

@@ -95,6 +95,7 @@ class MethodChannelFirebaseCrashlytics extends FirebaseCrashlyticsPlatform {
     required String? reason,
     bool fatal = false,
     String? buildId,
+    List<String> loadingUnits = const [],
     List<Map<String, String>>? stackTraceElements,
   }) async {
     try {
@@ -105,6 +106,7 @@ class MethodChannelFirebaseCrashlytics extends FirebaseCrashlyticsPlatform {
         'reason': reason,
         'fatal': fatal,
         'buildId': buildId ?? '',
+        'loadingUnits': loadingUnits,
         'stackTraceElements': stackTraceElements ?? [],
       });
     } on PlatformException catch (e, s) {

packages/firebase_crashlytics/firebase_crashlytics_platform_interface/lib/src/platform_interface/platform_interface_crashlytics.dart

@@ -114,6 +114,7 @@ abstract class FirebaseCrashlyticsPlatform extends PlatformInterface {
     required String? reason,
     bool fatal = false,
     String? buildId,
+    List<String> loadingUnits = const [],
     List<Map<String, String>>? stackTraceElements,
   }) {
     throw UnimplementedError('recordError() is not implemented');

packages/firebase_crashlytics/firebase_crashlytics_platform_interface/test/method_channel_tests/method_channel_crashlytics_test.dart

@@ -30,6 +30,7 @@ void main() {
     'fatal': false,
     'information': 'This is a test exception',
     'buildId': '',
+    'loadingUnits': [],
     'stackTraceElements': <Map<String, String>>[
       <String, String>{
         'declaringClass': 'MethodChannelCrashlyticsTest',
@@ -219,6 +220,7 @@ void main() {
               'information': kMockError['information'],
               'stackTraceElements': kMockError['stackTraceElements'],
               'buildId': '',
+              'loadingUnits': [],
             },
           ),
         ]);