diff options
Diffstat (limited to 'deps/v8/src/d8/d8-platforms.cc')
| -rw-r--r-- | deps/v8/src/d8/d8-platforms.cc | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/deps/v8/src/d8/d8-platforms.cc b/deps/v8/src/d8/d8-platforms.cc index 48ea3c94814..5ea43b14760 100644 --- a/deps/v8/src/d8/d8-platforms.cc +++ b/deps/v8/src/d8/d8-platforms.cc @@ -43,9 +43,17 @@ class PredictablePlatform : public Platform { int NumberOfWorkerThreads() override { return 0; } void CallOnWorkerThread(std::unique_ptr<Task> task) override { - // It's not defined when background tasks are being executed, so we can just - // execute them right away. - task->Run(); + // We post worker tasks on the foreground task runner of the + // {kProcessGlobalPredictablePlatformWorkerTaskQueue} isolate. The task + // queue of the {kProcessGlobalPredictablePlatformWorkerTaskQueue} isolate + // is then executed on the main thread to achieve predictable behavior. + // + // In this context here it is okay to call {GetForegroundTaskRunner} from a + // background thread. The reason is that code is executed sequentially with + // the PredictablePlatform, and that the {DefaultPlatform} does not access + // the isolate but only uses it as the key in a HashMap. + GetForegroundTaskRunner(kProcessGlobalPredictablePlatformWorkerTaskQueue) + ->PostTask(std::move(task)); } void CallDelayedOnWorkerThread(std::unique_ptr<Task> task, |