133 lines
5.4 KiB
C++
133 lines
5.4 KiB
C++
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// Copyright 2015 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "src/heap/slots-buffer.h"
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#include "test/cctest/cctest.h"
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namespace v8 {
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namespace internal {
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TEST(SlotsBufferObjectSlotsRemoval) {
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CcTest::InitializeVM();
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v8::HandleScope scope(CcTest::isolate());
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Isolate* isolate = CcTest::i_isolate();
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Heap* heap = isolate->heap();
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Factory* factory = isolate->factory();
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SlotsBuffer* buffer = new SlotsBuffer(NULL);
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void* fake_object[1];
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Handle<FixedArray> array = factory->NewFixedArray(2, TENURED);
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CHECK(heap->old_space()->Contains(*array));
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array->set(0, reinterpret_cast<Object*>(fake_object), SKIP_WRITE_BARRIER);
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// Firstly, let's test the regular slots buffer entry.
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buffer->Add(HeapObject::RawField(*array, FixedArray::kHeaderSize));
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CHECK(reinterpret_cast<void*>(buffer->Get(0)) ==
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HeapObject::RawField(*array, FixedArray::kHeaderSize));
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SlotsBuffer::RemoveObjectSlots(CcTest::i_isolate()->heap(), buffer,
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array->address(),
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array->address() + array->Size());
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CHECK(reinterpret_cast<void*>(buffer->Get(0)) ==
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HeapObject::RawField(heap->empty_fixed_array(),
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FixedArrayBase::kLengthOffset));
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// Secondly, let's test the typed slots buffer entry.
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SlotsBuffer::AddTo(NULL, &buffer, SlotsBuffer::EMBEDDED_OBJECT_SLOT,
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array->address() + FixedArray::kHeaderSize,
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SlotsBuffer::FAIL_ON_OVERFLOW);
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CHECK(reinterpret_cast<void*>(buffer->Get(1)) ==
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reinterpret_cast<Object**>(SlotsBuffer::EMBEDDED_OBJECT_SLOT));
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CHECK(reinterpret_cast<void*>(buffer->Get(2)) ==
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HeapObject::RawField(*array, FixedArray::kHeaderSize));
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SlotsBuffer::RemoveObjectSlots(CcTest::i_isolate()->heap(), buffer,
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array->address(),
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array->address() + array->Size());
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CHECK(reinterpret_cast<void*>(buffer->Get(1)) ==
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HeapObject::RawField(heap->empty_fixed_array(),
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FixedArrayBase::kLengthOffset));
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CHECK(reinterpret_cast<void*>(buffer->Get(2)) ==
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HeapObject::RawField(heap->empty_fixed_array(),
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FixedArrayBase::kLengthOffset));
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delete buffer;
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}
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TEST(FilterInvalidSlotsBufferEntries) {
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FLAG_manual_evacuation_candidates_selection = true;
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CcTest::InitializeVM();
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v8::HandleScope scope(CcTest::isolate());
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Isolate* isolate = CcTest::i_isolate();
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Heap* heap = isolate->heap();
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Factory* factory = isolate->factory();
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SlotsBuffer* buffer = new SlotsBuffer(NULL);
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// Set up a fake black object that will contain a recorded SMI, a recorded
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// pointer to a new space object, and a recorded pointer to a non-evacuation
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// candidate object. These object should be filtered out. Additionally,
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// we point to an evacuation candidate object which should not be filtered
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// out.
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// Create fake object and mark it black.
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Handle<FixedArray> fake_object = factory->NewFixedArray(23, TENURED);
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MarkBit mark_bit = Marking::MarkBitFrom(*fake_object);
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Marking::MarkBlack(mark_bit);
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// Write a SMI into field one and record its address;
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Object** field_smi = fake_object->RawFieldOfElementAt(0);
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*field_smi = Smi::FromInt(100);
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buffer->Add(field_smi);
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// Write a new space reference into field 2 and record its address;
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Handle<FixedArray> new_space_object = factory->NewFixedArray(23);
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mark_bit = Marking::MarkBitFrom(*new_space_object);
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Marking::MarkBlack(mark_bit);
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Object** field_new_space = fake_object->RawFieldOfElementAt(1);
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*field_new_space = *new_space_object;
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buffer->Add(field_new_space);
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// Write an old space reference into field 3 which points to an object not on
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// an evacuation candidate.
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Handle<FixedArray> old_space_object_non_evacuation =
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factory->NewFixedArray(23, TENURED);
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mark_bit = Marking::MarkBitFrom(*old_space_object_non_evacuation);
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Marking::MarkBlack(mark_bit);
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Object** field_old_space_object_non_evacuation =
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fake_object->RawFieldOfElementAt(2);
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*field_old_space_object_non_evacuation = *old_space_object_non_evacuation;
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buffer->Add(field_old_space_object_non_evacuation);
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// Write an old space reference into field 4 which points to an object on an
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// evacuation candidate.
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SimulateFullSpace(heap->old_space());
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Handle<FixedArray> valid_object =
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isolate->factory()->NewFixedArray(23, TENURED);
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Page* page = Page::FromAddress(valid_object->address());
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page->SetFlag(MemoryChunk::EVACUATION_CANDIDATE);
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Object** valid_field = fake_object->RawFieldOfElementAt(3);
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*valid_field = *valid_object;
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buffer->Add(valid_field);
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SlotsBuffer::RemoveInvalidSlots(heap, buffer);
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Object** kRemovedEntry = HeapObject::RawField(heap->empty_fixed_array(),
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FixedArrayBase::kLengthOffset);
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CHECK_EQ(buffer->Get(0), kRemovedEntry);
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CHECK_EQ(buffer->Get(1), kRemovedEntry);
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CHECK_EQ(buffer->Get(2), kRemovedEntry);
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CHECK_EQ(buffer->Get(3), valid_field);
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// Clean-up to make verify heap happy.
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mark_bit = Marking::MarkBitFrom(*fake_object);
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Marking::MarkWhite(mark_bit);
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mark_bit = Marking::MarkBitFrom(*new_space_object);
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Marking::MarkWhite(mark_bit);
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mark_bit = Marking::MarkBitFrom(*old_space_object_non_evacuation);
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Marking::MarkWhite(mark_bit);
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delete buffer;
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}
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} // namespace internal
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} // namespace v8
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