Performance stuck on loading

[GP4cK]

I cannot open the performance tab while profiling my app.

---

DevTools version: 2.48.0
IDE: VSCode
Connected Device:
CPU / OS: arm64 (64 bit) android
Connected app type: Flutter native (profile build)
Dart Version: 3.9.2
Flutter Version: 3.35.4 / stable
Framework / Engine: d693b4b9db / c298091351

Here are the logs from chrome that I exported. Looks like an issue of buffer size. Hope that helps:

flutter_bootstrap.js:121 Attempting to load DevTools with skwasm renderer.
main.dart.mjs:688 Server HTTP API is available, using server for storage.
main.dart.mjs:688 Version: 2.48.0, Renderer: skwasm
main.dart.mjs:688 Successfully connected to DTD at: ws://127.0.0.1:63086/dYFOG2uoewc=
main.dart.mjs:690 DevTools log level changed to INFO
_1573 @ main.dart.mjs:690
main.dart.mjs:688 Attempted to call extension 'ext.flutter.inspector.structuredErrors', but no service with that name exists
main.dart.mjs:690 readyToResume: (106) Isolate must be paused
_1573 @ main.dart.mjs:690
$func37554 @ main.dart.wasm:0x59247b
$func37556 @ main.dart.wasm:0x5924b6
$func1318 @ zone.dart:1538
$func4792 @ main.dart.wasm:0x23ee3e
$func4796 @ zone.dart:1329
$func1635 @ stream_impl.dart:381
$func1632 @ stream_impl.dart:375
$func1621 @ stream_impl.dart:308
$func1619 @ broadcast_stream_controller.dart:385
$func1597 @ broadcast_stream_controller.dart:379
$func1587 @ broadcast_stream_controller.dart:257
$func4173 @ broadcast_stream_controller.dart:255
$func4168 @ logger.dart:238
$func5067 @ logger.dart:289
$func17068 @ isolate_manager.dart:272
$func1342 @ async_patch.dart:108
$func1346 @ main.dart.wasm:0x1e70cb
$func1319 @ zone.dart:1560
$func4791 @ main.dart.wasm:0x23ee0a
$func1270 @ future_impl.dart:237
$func1267 @ future_impl.dart:738
$func1234 @ future_impl.dart:832
$func1237 @ main.dart.wasm:0x1e574b
$func1253 @ zone.dart:1525
$func4858 @ main.dart.wasm:0x23f6a0
$func4795 @ zone.dart:1422
$func4798 @ zone.dart:1321
$func4878 @ zone.dart:1362
$func4880 @ main.dart.wasm:0x23f99e
$func1246 @ schedule_microtask.dart:42
$func1248 @ main.dart.wasm:0x1e59c1
$$invokeCallback @ timer_patch.dart:71
(anonymous) @ main.dart.mjs:652
main.dart.mjs:66 InvalidProtocolBufferException: While parsing a protocol message, the input ended unexpectedly
in the middle of a field. This could either mean that the input
has been truncated or that an embedded message misreported its
own length.

Note that the buffer containing the message has 68412917 bytes, but
CodedBufferReader was allowed to parse only 67108864 bytes.

main.dart.mjs:66     at errors_patch.dart:19:39
    at coded_buffer_reader.dart:34:7
    at coded_buffer_reader.dart:110:7
    at coded_buffer.dart:186:15
    at generated_message.dart:192:5
    at main.dart.wasm:0x53cd5b
    at highlighter.dart:541:28
    at timeline_events_controller.dart:556:3
errors_patch.dart:39 Uncaught Exception {}
$func968 @ errors_patch.dart:39
$func981 @ errors_patch.dart:19
$$invokeCallback @ timer_patch.dart:80
(anonymous) @ main.dart.mjs:652
main.dart.mjs:66 ParallelWaitError: InvalidProtocolBufferException: While parsing a protocol message, the input ended unexpectedly
in the middle of a field. This could either mean that the input
has been truncated or that an embedded message misreported its
own length.

Note that the buffer containing the message has 68412917 bytes, but
CodedBufferReader was allowed to parse only 67108864 bytes.

main.dart.mjs:66     at errors_patch.dart:19:39
    at coded_buffer_reader.dart:34:7
    at coded_buffer_reader.dart:110:7
    at coded_buffer.dart:186:15
    at generated_message.dart:192:5
    at main.dart.wasm:0x53cd5b
    at highlighter.dart:541:28
    at timeline_events_controller.dart:556:3
errors_patch.dart:39 Uncaught Exception {}
$func968 @ errors_patch.dart:39
$func981 @ errors_patch.dart:19
$$invokeCallback @ timer_patch.dart:80
(anonymous) @ main.dart.mjs:652
main.dart.mjs:691 [zoneGuarded]: InvalidProtocolBufferException: While parsing a protocol message, the input ended unexpectedly
in the middle of a field. This could either mean that the input
has been truncated or that an embedded message misreported its
own length.

Note that the buffer containing the message has 68412917 bytes, but
CodedBufferReader was allowed to parse only 67108864 bytes.

file:///b/s/w/ir/x/w/rc/tmpzamrns9q/hosted/pub.dev/protobuf-3.1.0/lib/src/protobuf/coded_buffer_reader.dart 34:7                             _throwTruncatedMessageError
file:///b/s/w/ir/x/w/rc/tmpzamrns9q/hosted/pub.dev/protobuf-3.1.0/lib/src/protobuf/coded_buffer_reader.dart 110:7                            readMessage
file:///b/s/w/ir/x/w/rc/tmpzamrns9q/hosted/pub.dev/protobuf-3.1.0/lib/src/protobuf/coded_buffer.dart 186:15                                  _mergeFromCodedBufferReader
file:///b/s/w/ir/x/w/rc/tmpzamrns9q/hosted/pub.dev/protobuf-3.1.0/lib/src/protobuf/generated_message.dart 192:5                              mergeFromBuffer
file:///b/s/w/ir/x/w/rc/tmpzamrns9q/hosted/pub.dev/source_span-1.10.1/lib/src/highlighter.dart 541:28                                        _colorize
file:///b/s/w/ir/x/w/devtools/packages/devtools_app/lib/src/screens/performance/panes/timeline_events/timeline_events_controller.dart 556:3  _traceFromBinary

_1574 @ main.dart.mjs:691
$func37554 @ main.dart.wasm:0x592495
$func37556 @ main.dart.wasm:0x5924b6
$func1318 @ zone.dart:1546
$func4792 @ main.dart.wasm:0x23ee3e
$func4796 @ zone.dart:1329
$func1635 @ stream_impl.dart:381
$func1632 @ stream_impl.dart:375
$func1621 @ stream_impl.dart:308
$func1619 @ broadcast_stream_controller.dart:385
$func1597 @ broadcast_stream_controller.dart:379
$func1587 @ broadcast_stream_controller.dart:257
$func4173 @ broadcast_stream_controller.dart:255
$func4168 @ logger.dart:238
$func4897 @ logger.dart:296
$func4895 @ app_error_handling.dart:99
$func1341 @ async_patch.dart:105
$func1344 @ main.dart.wasm:0x1e70a1
$func1317 @ zone.dart:1849
$func1270 @ future_impl.dart:222
$func1303 @ future_impl.dart:720
$func1338 @ future_impl.dart:715
$func1340 @ main.dart.wasm:0x1e7026
$func1246 @ schedule_microtask.dart:42
$func1248 @ main.dart.wasm:0x1e59c1
$$invokeCallback @ timer_patch.dart:71
(anonymous) @ main.dart.mjs:652
main.dart.mjs:691 [zoneGuarded]: ParallelWaitError: InvalidProtocolBufferException: While parsing a protocol message, the input ended unexpectedly
in the middle of a field. This could either mean that the input
has been truncated or that an embedded message misreported its
own length.

Note that the buffer containing the message has 68412917 bytes, but
CodedBufferReader was allowed to parse only 67108864 bytes.

file:///b/s/w/ir/x/w/rc/tmpzamrns9q/hosted/pub.dev/protobuf-3.1.0/lib/src/protobuf/coded_buffer_reader.dart 34:7                             _throwTruncatedMessageError
file:///b/s/w/ir/x/w/rc/tmpzamrns9q/hosted/pub.dev/protobuf-3.1.0/lib/src/protobuf/coded_buffer_reader.dart 110:7                            readMessage
file:///b/s/w/ir/x/w/rc/tmpzamrns9q/hosted/pub.dev/protobuf-3.1.0/lib/src/protobuf/coded_buffer.dart 186:15                                  _mergeFromCodedBufferReader
file:///b/s/w/ir/x/w/rc/tmpzamrns9q/hosted/pub.dev/protobuf-3.1.0/lib/src/protobuf/generated_message.dart 192:5                              mergeFromBuffer
file:///b/s/w/ir/x/w/rc/tmpzamrns9q/hosted/pub.dev/source_span-1.10.1/lib/src/highlighter.dart 541:28                                        _colorize
file:///b/s/w/ir/x/w/devtools/packages/devtools_app/lib/src/screens/performance/panes/timeline_events/timeline_events_controller.dart 556:3  _traceFromBinary

_1574 @ main.dart.mjs:691
$func37554 @ main.dart.wasm:0x592495
$func37556 @ main.dart.wasm:0x5924b6
$func1318 @ zone.dart:1546
$func4792 @ main.dart.wasm:0x23ee3e
$func4796 @ zone.dart:1329
$func1635 @ stream_impl.dart:381
$func1632 @ stream_impl.dart:375
$func1621 @ stream_impl.dart:308
$func1619 @ broadcast_stream_controller.dart:385
$func1597 @ broadcast_stream_controller.dart:379
$func1587 @ broadcast_stream_controller.dart:257
$func4173 @ broadcast_stream_controller.dart:255
$func4168 @ logger.dart:238
$func4897 @ logger.dart:296
$func4895 @ app_error_handling.dart:99
$func1341 @ async_patch.dart:105
$func1344 @ main.dart.wasm:0x1e70a1
$func1317 @ zone.dart:1849
$func1270 @ future_impl.dart:222
$func1303 @ future_impl.dart:720
$func1338 @ future_impl.dart:715
$func1340 @ main.dart.wasm:0x1e7026
$func1246 @ schedule_microtask.dart:42
$func1248 @ main.dart.wasm:0x1e59c1
$$invokeCallback @ timer_patch.dart:71
(anonymous) @ main.dart.mjs:652

[jakemac53]

Note that there is a default max size for messages, but that should be set to 2GB (max value of a 32 bit signed integer).

It looks like you are hitting the limit at just 64MB - maybe we are creating a CodedBufferReader with a different sizeLimit?

[jakemac53]

Ah, actually in our version of protobuf, which is quite old (3.1.0, where 6.0.0 is the latest), the limit was what you are seeing. It looks like in 5.1.0 it was increased to be 2GB and the recursion limit was increased from 64 to 100.

The fix should be just upgrading protobuf to at least 5.1.0. That would allow us to handle the largest permitted proto sizes. If we see Protos larger than that we will have to chunk them.

[jakemac53]

cc @osa1 it looks like this is coming from the vm_service_protos package which has a version that does allow >=5.0.0 but has yet to be published.

Is this package ready to be published?

[osa1]

@jakemac53 I don't change vm_service_protos, I just updated its generated proto classes and protobuf dependency. I don't know whether it's ready for publishing. My changes are safe to publish though if you're asking that.

[jakemac53]

Ack, I can try sending out the PR to publish it then and see if I can track down the owners.

[elliette]

cc @bkonyi who I believe is the owner of vm_service_protos

[jakemac53]

Review is out here for the interested https://dart-review.googlesource.com/c/sdk/+/465380