Enable leak tracking for release mode.

[polina-c]

Subtasks:

• Make reachabilityBarrier (package dart:developer) available in release mode: https://github.com/itsjustkevin/sdk/commit/08b76a50fc138a94a5460f321500911b666eada1
• Enable leak tracker for release mode.

If you are interested in leak tracking in release mode, please, upvote this issue and justify your case.

[marandaneto]

I believe this would be very helpful for release builds as well, so people can upload their leaks to error reporting tools such as sentry.io and fix them.
Similar to https://square.github.io/leakcanary/uploading/

[noga-dev]

Could be useful for edge cases with special releases on beta channel. Would be good to add an enableInRelease flag.

[polina-c]

@a-siva and @bkonyi , thoughts?

[a-siva]

@a-siva and @bkonyi , thoughts

This is for flutter release builds I presume or is this request for command line Dart ?

[bkonyi]

I assume this is for PRODUCT mode builds, which includes Flutter release. Given that this is basically a counter that we increment (even in PRODUCT mode, although it's not accessible) I think it's low-risk to expose this in PRODUCT mode. However, if this feature requires any sort of VM service connection to work properly then this won't be something we can do.

[polina-c]

Thanks. Yes, it is just counter. VM service connection is not needed as the diagnostics will be saved and analyzed offline. Can we plan implementing this? Should I transfer the issue to VM repo?

[fzyzcjy]

I vote for it, if the performance drop is minimal in release mode. More sanity checks never do any harm (as long as they do not affect performance)!

[a-siva]

https://dart-review.googlesource.com/c/sdk/+/315981

[ZhouC125]

I vote for it, if the performance drop is minimal in release mode. More sanity checks never do any harm (as long as they do not affect performance)!

I agree with this comment.

[polina-c]

The feature is unblocked, but not implemented yet, and not part of leak_tracker MVP.
Reopening.

[a-siva]

The feature is unblocked, but not implemented yet, and not part of leak_tracker MVP. Reopening.

We have turned the reachability barrier on in product mode, why do you say it is not implemented yet?

[polina-c]

Issue title is 'Enable leak_tracker...'. I need to update leak_tracker

[polina-c]

@itsjustkevin, I am reopening the issue: while reachability barrier is now available in release mode (thank you!!!), leak tracker is still off for release mode.

[dnfield]

I do not think we should make this an option unless we have significant profiling data to support it.

In particular, we should have profiling data from a mid-tier Android device that shows this has little to no impact on frame/raster times. The profiling data we do have so far from macOS desktop applications suggests that it would.

[polina-c]

I do not think we should make this an option unless we have significant profiling data to support it.

In particular, we should have profiling data from a mid-tier Android device that shows this has little to no impact on frame/raster times. The profiling data we do have so far from macOS desktop applications suggests that it would.

I agree. Most likely in release mode leak analysis and reporting should happen not on timer, but on request from application, when application is known to be in stale state.