| // Copyright 2015 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/slots-buffer.h" |
| #include "test/cctest/cctest.h" |
| #include "test/cctest/heap/heap-utils.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| TEST(SlotsBufferObjectSlotsRemoval) { |
| CcTest::InitializeVM(); |
| v8::HandleScope scope(CcTest::isolate()); |
| Isolate* isolate = CcTest::i_isolate(); |
| Heap* heap = isolate->heap(); |
| Factory* factory = isolate->factory(); |
| |
| SlotsBuffer* buffer = new SlotsBuffer(NULL); |
| void* fake_object[1]; |
| |
| Handle<FixedArray> array = factory->NewFixedArray(2, TENURED); |
| CHECK(heap->old_space()->Contains(*array)); |
| array->set(0, reinterpret_cast<Object*>(fake_object), SKIP_WRITE_BARRIER); |
| |
| // Firstly, let's test the regular slots buffer entry. |
| buffer->Add(HeapObject::RawField(*array, FixedArray::kHeaderSize)); |
| CHECK(reinterpret_cast<void*>(buffer->Get(0)) == |
| HeapObject::RawField(*array, FixedArray::kHeaderSize)); |
| SlotsBuffer::RemoveObjectSlots(CcTest::i_isolate()->heap(), buffer, |
| array->address(), |
| array->address() + array->Size()); |
| CHECK(reinterpret_cast<void*>(buffer->Get(0)) == |
| HeapObject::RawField(heap->empty_fixed_array(), |
| FixedArrayBase::kLengthOffset)); |
| |
| // Secondly, let's test the typed slots buffer entry. |
| SlotsBuffer::AddTo(NULL, &buffer, SlotsBuffer::EMBEDDED_OBJECT_SLOT, |
| array->address() + FixedArray::kHeaderSize, |
| SlotsBuffer::FAIL_ON_OVERFLOW); |
| CHECK(reinterpret_cast<void*>(buffer->Get(1)) == |
| reinterpret_cast<Object**>(SlotsBuffer::EMBEDDED_OBJECT_SLOT)); |
| CHECK(reinterpret_cast<void*>(buffer->Get(2)) == |
| HeapObject::RawField(*array, FixedArray::kHeaderSize)); |
| SlotsBuffer::RemoveObjectSlots(CcTest::i_isolate()->heap(), buffer, |
| array->address(), |
| array->address() + array->Size()); |
| CHECK(reinterpret_cast<void*>(buffer->Get(1)) == |
| HeapObject::RawField(heap->empty_fixed_array(), |
| FixedArrayBase::kLengthOffset)); |
| CHECK(reinterpret_cast<void*>(buffer->Get(2)) == |
| HeapObject::RawField(heap->empty_fixed_array(), |
| FixedArrayBase::kLengthOffset)); |
| delete buffer; |
| } |
| |
| |
| TEST(FilterInvalidSlotsBufferEntries) { |
| FLAG_manual_evacuation_candidates_selection = true; |
| CcTest::InitializeVM(); |
| v8::HandleScope scope(CcTest::isolate()); |
| Isolate* isolate = CcTest::i_isolate(); |
| Heap* heap = isolate->heap(); |
| Factory* factory = isolate->factory(); |
| SlotsBuffer* buffer = new SlotsBuffer(NULL); |
| |
| // Set up a fake black object that will contain a recorded SMI, a recorded |
| // pointer to a new space object, and a recorded pointer to a non-evacuation |
| // candidate object. These object should be filtered out. Additionally, |
| // we point to an evacuation candidate object which should not be filtered |
| // out. |
| |
| // Create fake object and mark it black. |
| Handle<FixedArray> fake_object = factory->NewFixedArray(23, TENURED); |
| MarkBit mark_bit = Marking::MarkBitFrom(*fake_object); |
| Marking::MarkBlack(mark_bit); |
| |
| // Write a SMI into field one and record its address; |
| Object** field_smi = fake_object->RawFieldOfElementAt(0); |
| *field_smi = Smi::FromInt(100); |
| buffer->Add(field_smi); |
| |
| // Write a new space reference into field 2 and record its address; |
| Handle<FixedArray> new_space_object = factory->NewFixedArray(23); |
| mark_bit = Marking::MarkBitFrom(*new_space_object); |
| Marking::MarkBlack(mark_bit); |
| Object** field_new_space = fake_object->RawFieldOfElementAt(1); |
| *field_new_space = *new_space_object; |
| buffer->Add(field_new_space); |
| |
| // Write an old space reference into field 3 which points to an object not on |
| // an evacuation candidate. |
| Handle<FixedArray> old_space_object_non_evacuation = |
| factory->NewFixedArray(23, TENURED); |
| mark_bit = Marking::MarkBitFrom(*old_space_object_non_evacuation); |
| Marking::MarkBlack(mark_bit); |
| Object** field_old_space_object_non_evacuation = |
| fake_object->RawFieldOfElementAt(2); |
| *field_old_space_object_non_evacuation = *old_space_object_non_evacuation; |
| buffer->Add(field_old_space_object_non_evacuation); |
| |
| // Write an old space reference into field 4 which points to an object on an |
| // evacuation candidate. |
| heap::SimulateFullSpace(heap->old_space()); |
| Handle<FixedArray> valid_object = |
| isolate->factory()->NewFixedArray(23, TENURED); |
| Page* page = Page::FromAddress(valid_object->address()); |
| page->SetFlag(MemoryChunk::EVACUATION_CANDIDATE); |
| Object** valid_field = fake_object->RawFieldOfElementAt(3); |
| *valid_field = *valid_object; |
| buffer->Add(valid_field); |
| |
| SlotsBuffer::RemoveInvalidSlots(heap, buffer); |
| Object** kRemovedEntry = HeapObject::RawField(heap->empty_fixed_array(), |
| FixedArrayBase::kLengthOffset); |
| CHECK_EQ(buffer->Get(0), kRemovedEntry); |
| CHECK_EQ(buffer->Get(1), kRemovedEntry); |
| CHECK_EQ(buffer->Get(2), kRemovedEntry); |
| CHECK_EQ(buffer->Get(3), valid_field); |
| |
| // Clean-up to make verify heap happy. |
| mark_bit = Marking::MarkBitFrom(*fake_object); |
| Marking::MarkWhite(mark_bit); |
| mark_bit = Marking::MarkBitFrom(*new_space_object); |
| Marking::MarkWhite(mark_bit); |
| mark_bit = Marking::MarkBitFrom(*old_space_object_non_evacuation); |
| Marking::MarkWhite(mark_bit); |
| |
| delete buffer; |
| } |
| |
| } // namespace internal |
| } // namespace v8 |