| Index: test/cctest/test-unboxed-doubles.cc
|
| diff --git a/test/cctest/test-unboxed-doubles.cc b/test/cctest/test-unboxed-doubles.cc
|
| index d0da13713b8aeec67db9cd55a4fb3c2d132ab2eb..3299e12c5e4308ed7bf975f2e2ab156c2fead126 100644
|
| --- a/test/cctest/test-unboxed-doubles.cc
|
| +++ b/test/cctest/test-unboxed-doubles.cc
|
| @@ -1404,6 +1404,89 @@
|
| }
|
|
|
|
|
| +static int LenFromSize(int size) {
|
| + return (size - FixedArray::kHeaderSize) / kPointerSize;
|
| +}
|
| +
|
| +
|
| +HEAP_TEST(WriteBarriersInCopyJSObject) {
|
| + FLAG_max_semi_space_size = 1; // Ensure new space is not growing.
|
| + CcTest::InitializeVM();
|
| + Isolate* isolate = CcTest::i_isolate();
|
| + Heap* heap = CcTest::heap();
|
| +
|
| + v8::HandleScope scope(CcTest::isolate());
|
| +
|
| + // The plan: create JSObject which contains unboxed double value that looks
|
| + // like a reference to an object in new space.
|
| + // Then clone this object (forcing it to go into old space) and check
|
| + // that the value of the unboxed double property of the cloned object has
|
| + // was not corrupted by GC.
|
| +
|
| + // Step 1: prepare a map for the object. We add unboxed double property to it.
|
| + // Create a map with single inobject property.
|
| + Handle<Map> my_map = Map::Create(isolate, 1);
|
| + Handle<String> name = isolate->factory()->InternalizeUtf8String("foo");
|
| + my_map = Map::CopyWithField(my_map, name, HeapType::Any(isolate), NONE,
|
| + Representation::Double(),
|
| + INSERT_TRANSITION).ToHandleChecked();
|
| +
|
| + int object_size = my_map->instance_size();
|
| +
|
| + // Step 2: allocate a lot of objects so to almost fill new space: we need
|
| + // just enough room to allocate JSObject and thus fill the newspace.
|
| +
|
| + int allocation_amount =
|
| + Min(FixedArray::kMaxSize, Page::kMaxRegularHeapObjectSize + kPointerSize);
|
| + int allocation_len = LenFromSize(allocation_amount);
|
| + NewSpace* new_space = heap->new_space();
|
| + DisableInlineAllocationSteps(new_space);
|
| + Address* top_addr = new_space->allocation_top_address();
|
| + Address* limit_addr = new_space->allocation_limit_address();
|
| + while ((*limit_addr - *top_addr) > allocation_amount) {
|
| + CHECK(!heap->always_allocate());
|
| + Object* array = heap->AllocateFixedArray(allocation_len).ToObjectChecked();
|
| + CHECK(new_space->Contains(array));
|
| + }
|
| +
|
| + // Step 3: now allocate fixed array and JSObject to fill the whole new space.
|
| + int to_fill = static_cast<int>(*limit_addr - *top_addr - object_size);
|
| + int fixed_array_len = LenFromSize(to_fill);
|
| + CHECK(fixed_array_len < FixedArray::kMaxLength);
|
| +
|
| + CHECK(!heap->always_allocate());
|
| + Object* array = heap->AllocateFixedArray(fixed_array_len).ToObjectChecked();
|
| + CHECK(new_space->Contains(array));
|
| +
|
| + Object* object = heap->AllocateJSObjectFromMap(*my_map).ToObjectChecked();
|
| + CHECK(new_space->Contains(object));
|
| + JSObject* jsobject = JSObject::cast(object);
|
| + CHECK_EQ(0, FixedArray::cast(jsobject->elements())->length());
|
| + CHECK_EQ(0, jsobject->properties()->length());
|
| +
|
| + // Construct a double value that looks like a pointer to the new space object
|
| + // and store it into the obj.
|
| + Address fake_object = reinterpret_cast<Address>(array) + kPointerSize;
|
| + double boom_value = bit_cast<double>(fake_object);
|
| + FieldIndex index = FieldIndex::ForDescriptor(*my_map, 0);
|
| + jsobject->RawFastDoublePropertyAtPut(index, boom_value);
|
| +
|
| + CHECK_EQ(0, static_cast<int>(*limit_addr - *top_addr));
|
| +
|
| + // Step 4: clone jsobject, but force always allocate first to create a clone
|
| + // in old pointer space.
|
| + AlwaysAllocateScope aa_scope(isolate);
|
| + Object* clone_obj = heap->CopyJSObject(jsobject).ToObjectChecked();
|
| + Handle<JSObject> clone(JSObject::cast(clone_obj));
|
| + CHECK(heap->old_space()->Contains(clone->address()));
|
| +
|
| + CcTest::heap()->CollectGarbage(NEW_SPACE, "boom");
|
| +
|
| + // The value in cloned object should not be corrupted by GC.
|
| + CHECK_EQ(boom_value, clone->RawFastDoublePropertyAt(index));
|
| +}
|
| +
|
| +
|
| static void TestWriteBarrier(Handle<Map> map, Handle<Map> new_map,
|
| int tagged_descriptor, int double_descriptor,
|
| bool check_tagged_value = true) {
|
|
|