[heap] Ensure finalization of incremental marking even if all allocations

test/cctest/heap/test-heap.cc

Index: test/cctest/heap/test-heap.cc
diff --git a/test/cctest/heap/test-heap.cc b/test/cctest/heap/test-heap.cc
index 7d1cf4cefb452299a548e7df4db1b60f068fd323..6dcca5979117cb20084409ac2bfd6107cee0f3c9 100644
--- a/test/cctest/heap/test-heap.cc
+++ b/test/cctest/heap/test-heap.cc
@@ -7048,5 +7048,37 @@ TEST(RememberedSetRemoveRange) {
   });
 }
 
+HEAP_TEST(Regress670675) {
+  if (!FLAG_incremental_marking) return;
+  CcTest::InitializeVM();
+  v8::HandleScope scope(CcTest::isolate());
+  Heap* heap = CcTest::heap();
+  Isolate* isolate = heap->isolate();
+  i::MarkCompactCollector* collector = heap->mark_compact_collector();
+  CcTest::CollectAllGarbage(i::Heap::kFinalizeIncrementalMarkingMask);
+
+  if (collector->sweeping_in_progress()) {
+    collector->EnsureSweepingCompleted();
+  }
+  i::IncrementalMarking* marking = CcTest::heap()->incremental_marking();
+  if (marking->IsStopped()) {
+    marking->Start(i::GarbageCollectionReason::kTesting);
+  }
+  size_t array_length = Page::kPageSize / kPointerSize + 100;
+  size_t n = heap->OldGenerationSpaceAvailable() / array_length;
+  for (size_t i = 0; i < n + 10; i++) {
+    {
+      HandleScope inner_scope(isolate);
+      isolate->factory()->NewFixedArray(static_cast<int>(array_length));
+    }
+    if (marking->IsStopped()) break;
+    double deadline = heap->MonotonicallyIncreasingTimeInMs() + 1;
+    marking->AdvanceIncrementalMarking(
+        deadline, IncrementalMarking::GC_VIA_STACK_GUARD,
+        IncrementalMarking::FORCE_COMPLETION, StepOrigin::kV8);
+  }
+  DCHECK(marking->IsStopped());
+}
+
 }  // namespace internal
 }  // namespace v8