[heap] Remove black pages and use black areas instead.

test/unittests/heap/marking-unittest.cc

Index: test/unittests/heap/marking-unittest.cc
diff --git a/test/unittests/heap/marking-unittest.cc b/test/unittests/heap/marking-unittest.cc
index 5be909a1a400a7f7babe9d30cf749df4b78cb5f3..0d90019d5cb93fba4629d99ba93f1d90d47be8c5 100644
--- a/test/unittests/heap/marking-unittest.cc
+++ b/test/unittests/heap/marking-unittest.cc
@@ -110,5 +110,37 @@ TEST(Marking, TransitionWhiteGreyBlackGrey) {
   free(bitmap);
 }
 
+TEST(Marking, SetAndClearRange) {
+  Bitmap* bitmap = reinterpret_cast<Bitmap*>(
+      calloc(Bitmap::kSize / kPointerSize, kPointerSize));
+  for (int i = 0; i < 3; i++) {
+    bitmap->SetRange(i, Bitmap::kBitsPerCell + i);
+    CHECK_EQ(reinterpret_cast<uint32_t*>(bitmap)[0], 0xffffffff << i);
+    CHECK_EQ(reinterpret_cast<uint32_t*>(bitmap)[1], (1 << i) - 1);
+    bitmap->ClearRange(i, Bitmap::kBitsPerCell + i);
+    CHECK_EQ(reinterpret_cast<uint32_t*>(bitmap)[0], 0x0);
+    CHECK_EQ(reinterpret_cast<uint32_t*>(bitmap)[1], 0x0);
+  }
+  free(bitmap);
+}
+
+TEST(Marking, ClearMultipleRanges) {
+  Bitmap* bitmap = reinterpret_cast<Bitmap*>(
+      calloc(Bitmap::kSize / kPointerSize, kPointerSize));
+  bitmap->SetRange(0, Bitmap::kBitsPerCell * 3);
+  CHECK_EQ(reinterpret_cast<uint32_t*>(bitmap)[0], 0xffffffff);
+  CHECK_EQ(reinterpret_cast<uint32_t*>(bitmap)[1], 0xffffffff);
+  CHECK_EQ(reinterpret_cast<uint32_t*>(bitmap)[2], 0xffffffff);
+  bitmap->ClearRange(Bitmap::kBitsPerCell / 2, Bitmap::kBitsPerCell);
+  bitmap->ClearRange(Bitmap::kBitsPerCell,
+                     Bitmap::kBitsPerCell + Bitmap::kBitsPerCell / 2);
+  bitmap->ClearRange(Bitmap::kBitsPerCell * 2 + 8,
+                     Bitmap::kBitsPerCell * 2 + 16);
+  bitmap->ClearRange(Bitmap::kBitsPerCell * 2 + 24, Bitmap::kBitsPerCell * 3);
+  CHECK_EQ(reinterpret_cast<uint32_t*>(bitmap)[0], 0xffff);
+  CHECK_EQ(reinterpret_cast<uint32_t*>(bitmap)[1], 0xffff0000);
+  CHECK_EQ(reinterpret_cast<uint32_t*>(bitmap)[2], 0xff00ff);
+  free(bitmap);
+}
 }  // namespace internal
 }  // namespace v8