Chinmay Garde e8827952d5 Fix data race in DartIsolateGroupData. (flutter/engine#15949) ...

This class is meant to be thread safe. In fact, its headerdoc statement on
thread safety even mentions this. All fields on the class are readonly except
the child isolate preparer. This field is set during VM instantiated isolate
initialization. The VM may launch multiple isolate in the same isolate group on
at the same time (each on a VM backed thread pool thread). Attempting to set the
field without synchronization is a data race.

Fixes https://github.com/flutter/flutter/issues/49358
Fixes b/147798920

2020-01-23 16:03:37 -08:00

..

src/flutter

Fix data race in DartIsolateGroupData. (flutter/engine#15949)

2020-01-23 16:03:37 -08:00