[serializer][heap] Record references in deserialized code objects.

test/cctest/test-serialize.cc

Index: test/cctest/test-serialize.cc
diff --git a/test/cctest/test-serialize.cc b/test/cctest/test-serialize.cc
index c218461c75dd1136f3b766166ddd05c8c165ae7d..a2e29db133582f952d550a3e4fa6a54cb3a498c0 100644
--- a/test/cctest/test-serialize.cc
+++ b/test/cctest/test-serialize.cc
@@ -1885,6 +1885,61 @@ TEST(CodeSerializerCell) {
 }
 #endif  // V8_TARGET_ARCH_X64
 
+TEST(CodeSerializerEmbeddedObject) {
+  FLAG_serialize_toplevel = true;
+  LocalContext context;
+  Isolate* isolate = CcTest::i_isolate();
+  isolate->compilation_cache()->Disable();  // Disable same-isolate code cache.
+  Heap* heap = isolate->heap();
+  v8::HandleScope scope(CcTest::isolate());
+
+  size_t actual_size;
+  byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
+      Assembler::kMinimalBufferSize, &actual_size, true));
+  CHECK(buffer);
+  HandleScope handles(isolate);
+
+  MacroAssembler assembler(isolate, buffer, static_cast<int>(actual_size),
+                           v8::internal::CodeObjectRequired::kYes);
+  assembler.enable_serializer();
+  Handle<Object> number = isolate->factory()->NewHeapNumber(0.3);
+  CHECK(isolate->heap()->InNewSpace(*number));
+  Handle<Code> code;
+  {
+    MacroAssembler* masm = &assembler;
+    masm->Push(number);
+    CodeDesc desc;
+    masm->GetCode(&desc);
+    code = isolate->factory()->NewCode(desc, Code::ComputeFlags(Code::FUNCTION),
+                                       masm->CodeObject());
+    code->set_has_reloc_info_for_serialization(true);
+  }
+  RelocIterator rit1(*code, RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT));
+  CHECK_EQ(*number, rit1.rinfo()->target_object());
+
+  Handle<String> source = isolate->factory()->empty_string();
+  Handle<SharedFunctionInfo> sfi =
+      isolate->factory()->NewSharedFunctionInfo(source, code, false);
+  ScriptData* script_data = CodeSerializer::Serialize(isolate, sfi, source);
+
+  Handle<SharedFunctionInfo> copy =
+      CodeSerializer::Deserialize(isolate, script_data, source)
+          .ToHandleChecked();
+  RelocIterator rit2(copy->code(),
+                     RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT));
+  CHECK(rit2.rinfo()->target_object()->IsHeapNumber());
+  CHECK_EQ(0.3, HeapNumber::cast(rit2.rinfo()->target_object())->value());
+
+  heap->CollectAllAvailableGarbage();
+
+  RelocIterator rit3(copy->code(),
+                     RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT));
+  CHECK(rit3.rinfo()->target_object()->IsHeapNumber());
+  CHECK_EQ(0.3, HeapNumber::cast(rit3.rinfo()->target_object())->value());
+
+  delete script_data;
+}
+
 TEST(SnapshotCreatorMultipleContexts) {
   DisableTurbofan();
   v8::StartupData blob;