feat: profiling for iOS/macOS

.github/workflows/analyze.yml

@@ -60,6 +60,11 @@ jobs:
     timeout-minutes: 20
     steps:
       - uses: actions/checkout@v3
+      - name: Apply dependency override
+        if: ${{ inputs.package == 'flutter' }}
+        working-directory: ${{ inputs.package }}
+        run: |
+          sed -i.bak 's|sentry:.*|sentry:\n    path: /github/workspace/dart|g' pubspec.yaml
       - uses: axel-op/dart-package-analyzer@7a6c3c66bce78d82b729a1ffef2d9458fde6c8d2 # pin@v3
         id: analysis
         with:

.github/workflows/flutter.yml

@@ -116,6 +116,7 @@ jobs:
         with:
           path: "./flutter/coverage/lcov.info"
           min_coverage: 90
+          exclude: "lib/src/native/cocoa/binding.dart"
 
       - name: Build ${{ matrix.target }}
         run: |

.github/workflows/flutter_test.yml

@@ -104,7 +104,7 @@ jobs:
           avd-name: macOS-avd-x86_64-31
           emulator-options: -no-snapshot-save -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
           disable-animations: true
-          script: flutter test integration_test --verbose
+          script: flutter test integration_test/all.dart --verbose
 
   cocoa:
     name: "${{ matrix.target }} | ${{ matrix.sdk }}"
@@ -155,7 +155,7 @@ jobs:
       - name: run integration test
         # Disable flutter integration tests for iOS for now (https://github.com/getsentry/sentry-dart/issues/1605#issuecomment-1695809346)
         if: ${{ matrix.target != 'ios' }}
-        run: flutter test -d "${{ steps.device.outputs.name }}" integration_test --verbose
+        run: flutter test -d "${{ steps.device.outputs.name }}" integration_test/all.dart --verbose
 
       - name: run native test
         # We only have the native unit test package in the iOS xcodeproj at the moment.

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 ### Features
 
+- Initial (alpha) support for profiling on iOS and macOS ([#1611](https://github.com/getsentry/sentry-dart/pull/1611))
 - Breadcrumbs for file I/O operations ([#1649](https://github.com/getsentry/sentry-dart/pull/1649))
 
 ### Dependencies

dart/analysis_options.yaml

@@ -3,6 +3,7 @@ include: package:lints/recommended.yaml
 analyzer:
   exclude:
     - example/** # the example has its own 'analysis_options.yaml'
+    - test/*.mocks.dart
   errors:
     # treat missing required parameters as a warning (not a hint)
     missing_required_param: error

dart/lib/src/hub.dart

@@ -2,6 +2,7 @@ import 'dart:async';
 import 'dart:collection';
 
 import 'package:meta/meta.dart';
+import 'profiling.dart';
 import 'propagation_context.dart';
 import 'transport/data_category.dart';
 
@@ -435,12 +436,12 @@ class Hub {
     } else {
       final item = _peek();
 
-      final samplingContext = SentrySamplingContext(
-          transactionContext, customSamplingContext ?? {});
-
       // if transactionContext has no sampled decision, run the traces sampler
-      if (transactionContext.samplingDecision == null) {
-        final samplingDecision = _tracesSampler.sample(samplingContext);
+      var samplingDecision = transactionContext.samplingDecision;
+      if (samplingDecision == null) {
+        final samplingContext = SentrySamplingContext(
+            transactionContext, customSamplingContext ?? {});
+        samplingDecision = _tracesSampler.sample(samplingContext);
         transactionContext =
             transactionContext.copyWith(samplingDecision: samplingDecision);
       }
@@ -451,6 +452,12 @@ class Hub {
         );
       }
 
+      SentryProfiler? profiler;
+      if (_profilerFactory != null &&
+          _tracesSampler.sampleProfiling(samplingDecision)) {
+        profiler = _profilerFactory?.startProfiler(transactionContext);
+      }
+
       final tracer = SentryTracer(
         transactionContext,
         this,
@@ -459,6 +466,7 @@ class Hub {
         autoFinishAfter: autoFinishAfter,
         trimEnd: trimEnd ?? false,
         onFinish: onFinish,
+        profiler: profiler,
       );
       if (bindToScope ?? false) {
         item.scope.span = tracer;
@@ -554,6 +562,14 @@ class Hub {
   ) =>
       _throwableToSpan.add(throwable, span, transaction);
 
+  @internal
+  SentryProfilerFactory? get profilerFactory => _profilerFactory;
+
+  @internal
+  set profilerFactory(SentryProfilerFactory? value) => _profilerFactory = value;
+
+  SentryProfilerFactory? _profilerFactory;
+
   SentryEvent _assignTraceContext(SentryEvent event) {
     // assign trace context
     if (event.throwable != null && event.contexts.trace == null) {

dart/lib/src/hub_adapter.dart

@@ -4,6 +4,7 @@ import 'package:meta/meta.dart';
 import 'hint.dart';
 
 import 'hub.dart';
+import 'profiling.dart';
 import 'protocol.dart';
 import 'scope.dart';
 import 'sentry.dart';
@@ -168,6 +169,16 @@ class HubAdapter implements Hub {
   ) =>
       Sentry.currentHub.setSpanContext(throwable, span, transaction);
 
+  @internal
+  @override
+  set profilerFactory(SentryProfilerFactory? value) =>
+      Sentry.currentHub.profilerFactory = value;
+
+  @internal
+  @override
+  SentryProfilerFactory? get profilerFactory =>
+      Sentry.currentHub.profilerFactory;
+
   @override
   Scope get scope => Sentry.currentHub.scope;
 }

dart/lib/src/noop_hub.dart

@@ -4,6 +4,7 @@ import 'package:meta/meta.dart';
 
 import 'hint.dart';
 import 'hub.dart';
+import 'profiling.dart';
 import 'protocol.dart';
 import 'scope.dart';
 import 'sentry_client.dart';
@@ -120,6 +121,14 @@ class NoOpHub implements Hub {
   @override
   void setSpanContext(throwable, ISentrySpan span, String transaction) {}
 
+  @internal
+  @override
+  set profilerFactory(SentryProfilerFactory? value) {}
+
+  @internal
+  @override
+  SentryProfilerFactory? get profilerFactory => null;
+
   @override
   Scope get scope => Scope(_options);
 }

dart/lib/src/profiling.dart

@@ -0,0 +1,22 @@
+import 'dart:async';
+
+import 'package:meta/meta.dart';
+
+import '../sentry.dart';
+
+@internal
+abstract class SentryProfilerFactory {
+  SentryProfiler? startProfiler(SentryTransactionContext context);
+}
+
+@internal
+abstract class SentryProfiler {
+  Future<SentryProfileInfo?> finishFor(SentryTransaction transaction);
+  void dispose();
+}
+
+// See https://develop.sentry.dev/sdk/profiles/
+@internal
+abstract class SentryProfileInfo {
+  SentryEnvelopeItem asEnvelopeItem();
+}

dart/lib/src/protocol/sentry_event.dart

@@ -59,7 +59,7 @@ class SentryEvent with SentryEventLike<SentryEvent> {
   /// The ID Sentry.io assigned to the submitted event for future reference.
   final SentryId eventId;
 
-  /// A timestamp representing when the breadcrumb occurred.
+  /// A timestamp representing when the event occurred.
   final DateTime? timestamp;
 
   /// A string representing the platform the SDK is submitting from. This will be used by the Sentry interface to customize various components in the interface.

dart/lib/src/protocol/sentry_transaction.dart

@@ -10,12 +10,13 @@ class SentryTransaction extends SentryEvent {
   late final DateTime startTimestamp;
   static const String _type = 'transaction';
   late final List<SentrySpan> spans;
-  final SentryTracer _tracer;
+  @internal
+  final SentryTracer tracer;
   late final Map<String, SentryMeasurement> measurements;
   late final SentryTransactionInfo? transactionInfo;
 
   SentryTransaction(
-    this._tracer, {
+    this.tracer, {
     SentryId? eventId,
     DateTime? timestamp,
     String? platform,
@@ -39,37 +40,37 @@ class SentryTransaction extends SentryEvent {
     SentryTransactionInfo? transactionInfo,
   }) : super(
           eventId: eventId,
-          timestamp: timestamp ?? _tracer.endTimestamp,
+          timestamp: timestamp ?? tracer.endTimestamp,
           platform: platform,
           serverName: serverName,
           release: release,
           dist: dist,
           environment: environment,
-          transaction: transaction ?? _tracer.name,
-          throwable: throwable ?? _tracer.throwable,
-          tags: tags ?? _tracer.tags,
+          transaction: transaction ?? tracer.name,
+          throwable: throwable ?? tracer.throwable,
+          tags: tags ?? tracer.tags,
           // ignore: deprecated_member_use_from_same_package
-          extra: extra ?? _tracer.data,
+          extra: extra ?? tracer.data,
           user: user,
           contexts: contexts,
           breadcrumbs: breadcrumbs,
           sdk: sdk,
           request: request,
           type: _type,
         ) {
-    startTimestamp = _tracer.startTimestamp;
+    startTimestamp = tracer.startTimestamp;
 
-    final spanContext = _tracer.context;
-    spans = _tracer.children;
+    final spanContext = tracer.context;
+    spans = tracer.children;
     this.measurements = measurements ?? {};
 
     this.contexts.trace = spanContext.toTraceContext(
-      sampled: _tracer.samplingDecision?.sampled,
-      status: _tracer.status,
+      sampled: tracer.samplingDecision?.sampled,
+      status: tracer.status,
     );
 
     this.transactionInfo = transactionInfo ??
-        SentryTransactionInfo(_tracer.transactionNameSource.name);
+        SentryTransactionInfo(tracer.transactionNameSource.name);
   }
 
   @override
@@ -136,7 +137,7 @@ class SentryTransaction extends SentryEvent {
     SentryTransactionInfo? transactionInfo,
   }) =>
       SentryTransaction(
-        _tracer,
+        tracer,
         eventId: eventId ?? this.eventId,
         timestamp: timestamp ?? this.timestamp,
         platform: platform ?? this.platform,

dart/lib/src/sentry_client.dart

@@ -345,6 +345,11 @@ class SentryClient {
       traceContext: traceContext,
       attachments: attachments,
     );
+
+    final profileInfo = preparedTransaction.tracer.profileInfo;
+    if (profileInfo != null) {
+      envelope.items.add(profileInfo.asEnvelopeItem());
+    }
     final id = await captureEnvelope(envelope);
 
     return id ?? SentryId.empty();

dart/lib/src/sentry_envelope_item.dart

@@ -1,5 +1,6 @@
 import 'dart:async';
 import 'dart:convert';
+
 import 'client_reports/client_report.dart';
 import 'protocol.dart';
 import 'utils.dart';
@@ -97,6 +98,7 @@ class SentryEnvelopeItem {
 
       final newLine = utf8.encode('\n');
       final data = await dataFactory();
+      // TODO the data copy could be avoided - this would be most significant with attachments.
       return [...itemHeader, ...newLine, ...data];
     } catch (e) {
       return [];

dart/lib/src/sentry_item_type.dart

@@ -4,5 +4,6 @@ class SentryItemType {
   static const String attachment = 'attachment';
   static const String transaction = 'transaction';
   static const String clientReport = 'client_report';
+  static const String profile = 'profile';
   static const String unknown = '__unknown__';
 }

dart/lib/src/sentry_options.dart

@@ -289,6 +289,17 @@ class SentryOptions {
   /// to be sent to Sentry.
   TracesSamplerCallback? tracesSampler;
 
+  double? _profilesSampleRate;
+
+  @internal // Only exposed by SentryFlutterOptions at the moment.
+  double? get profilesSampleRate => _profilesSampleRate;
+
+  @internal // Only exposed by SentryFlutterOptions at the moment.
+  set profilesSampleRate(double? value) {
+    assert(value == null || (value >= 0 && value <= 1));
+    _profilesSampleRate = value;
+  }
+
   /// Send statistics to sentry when the client drops events.
   bool sendClientReports = true;
 

dart/lib/src/sentry_tracer.dart

@@ -3,6 +3,7 @@ import 'dart:async';
 import 'package:meta/meta.dart';
 
 import '../sentry.dart';
+import 'profiling.dart';
 import 'sentry_tracer_finish_status.dart';
 import 'utils/sample_rate_format.dart';
 
@@ -31,6 +32,13 @@ class SentryTracer extends ISentrySpan {
 
   SentryTraceContextHeader? _sentryTraceContextHeader;
 
+  // Profiler attached to this tracer.
+  late final SentryProfiler? profiler;
+
+  // Resulting profile, after it has been collected.  This is later used by
+  // SentryClient to attach as an envelope item when sending the transaction.
+  SentryProfileInfo? profileInfo;
+
   /// If [waitForChildren] is true, this transaction will not finish until all
   /// its children are finished.
   ///
@@ -52,6 +60,7 @@ class SentryTracer extends ISentrySpan {
     Duration? autoFinishAfter,
     bool trimEnd = false,
     OnTransactionFinish? onFinish,
+    this.profiler,
   }) {
     _rootSpan = SentrySpan(
       this,
@@ -77,8 +86,13 @@ class SentryTracer extends ISentrySpan {
     final commonEndTimestamp = endTimestamp ?? _hub.options.clock();
     _autoFinishAfterTimer?.cancel();
     _finishStatus = SentryTracerFinishStatus.finishing(status);
-    if (!_rootSpan.finished &&
-        (!_waitForChildren || _haveAllChildrenFinished())) {
+    if (_rootSpan.finished) {
+      return;
+    }
+    if (_waitForChildren && !_haveAllChildrenFinished()) {
+      return;
+    }
+    try {
       _rootSpan.status ??= status;
 
       // remove span where its endTimestamp is before startTimestamp
@@ -131,10 +145,17 @@ class SentryTracer extends ISentrySpan {
 
       final transaction = SentryTransaction(this);
       transaction.measurements.addAll(_measurements);
+
+      profileInfo = (status == null || status == SpanStatus.ok())
+          ? await profiler?.finishFor(transaction)
+          : null;
+
       await _hub.captureTransaction(
         transaction,
         traceContext: traceContext(),
       );
+    } finally {
+      profiler?.dispose();
     }
   }
 

dart/lib/src/sentry_traces_sampler.dart

@@ -67,5 +67,13 @@ class SentryTracesSampler {
     return SentryTracesSamplingDecision(false);
   }
 
+  bool sampleProfiling(SentryTracesSamplingDecision tracesSamplingDecision) {
+    double? optionsRate = _options.profilesSampleRate;
+    if (optionsRate == null || !tracesSamplingDecision.sampled) {
+      return false;
+    }
+    return _sample(optionsRate);
+  }
+
   bool _sample(double result) => !(result < _random.nextDouble());
 }