[heap] New heuristics for starting of incremental marking.

src/heap/incremental-marking-job.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/heap/incremental-marking-job.h"
 
 #include "src/base/platform/time.h"
 #include "src/heap/heap-inl.h"
 #include "src/heap/heap.h"
 #include "src/heap/incremental-marking.h"
@@ skipping 27 matching lines @@
       deadline, i::IncrementalMarking::NO_GC_VIA_STACK_GUARD,
       i::IncrementalMarking::FORCE_COMPLETION, i::StepOrigin::kTask);
   heap->FinalizeIncrementalMarkingIfComplete(
       GarbageCollectionReason::kFinalizeMarkingViaTask);
 }
 
 void IncrementalMarkingJob::Task::RunInternal() {
   Heap* heap = isolate()->heap();
   job_->NotifyTask();
   IncrementalMarking* incremental_marking = heap->incremental_marking();
+  if (incremental_marking->IsStopped()) {
+    if (heap->ReachedIncrementalMarkingLimit() !=
+        Heap::IncrementalMarkingLimit::kNoLimit) {
+      heap->StartIncrementalMarking(Heap::kNoGCFlags,
+                                    GarbageCollectionReason::kIdleTask,
+                                    kNoGCCallbackFlags);
+    }
+  }
   if (!incremental_marking->IsStopped()) {
     Step(heap);
     if (!incremental_marking->IsStopped()) {
       job_->ScheduleTask(heap);
     }
   }
 }
 
 }  // namespace internal
 }  // namespace v8