33994b4a22
PropertyKind: DATA -> kData ACCESSOR -> kAccessor PropertyType: FIELD -> DATA CONSTANT -> DATA_CONSTANT ACCESSOR_FIELD -> ACCESSOR CALLBACKS -> ACCESSOR_CONSTANT PropertyLocation: IN_OBJECT -> kField IN_DESCRIPTOR -> kDescriptor StoreMode: FORCE_IN_OBJECT -> FORCE_FIELD FieldDescriptor -> DataDescriptor ConstantDescriptor -> DataConstantDescriptor CallbacksDescriptor -> AccessorConstantDescriptor Review URL: https://codereview.chromium.org/856503002 Cr-Commit-Position: refs/heads/master@{#26146}
1163 lines
40 KiB
C++
1163 lines
40 KiB
C++
// Copyright 2014 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 <stdlib.h>
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#include <utility>
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#include "src/v8.h"
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#include "src/compilation-cache.h"
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#include "src/execution.h"
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#include "src/factory.h"
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#include "src/global-handles.h"
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#include "src/ic/ic.h"
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#include "src/macro-assembler.h"
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#include "test/cctest/cctest.h"
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using namespace v8::base;
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using namespace v8::internal;
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#if (V8_DOUBLE_FIELDS_UNBOXING)
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static double GetDoubleFieldValue(JSObject* obj, FieldIndex field_index) {
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if (obj->IsUnboxedDoubleField(field_index)) {
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return obj->RawFastDoublePropertyAt(field_index);
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} else {
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Object* value = obj->RawFastPropertyAt(field_index);
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DCHECK(value->IsMutableHeapNumber());
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return HeapNumber::cast(value)->value();
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}
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}
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const int kNumberOfBits = 32;
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enum TestPropertyKind {
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PROP_CONSTANT,
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PROP_SMI,
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PROP_DOUBLE,
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PROP_TAGGED,
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PROP_KIND_NUMBER
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};
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static Representation representations[PROP_KIND_NUMBER] = {
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Representation::None(), Representation::Smi(), Representation::Double(),
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Representation::Tagged()};
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static Handle<DescriptorArray> CreateDescriptorArray(Isolate* isolate,
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TestPropertyKind* props,
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int kPropsCount) {
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Factory* factory = isolate->factory();
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Handle<String> func_name = factory->InternalizeUtf8String("func");
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Handle<JSFunction> func = factory->NewFunction(func_name);
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Handle<DescriptorArray> descriptors =
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DescriptorArray::Allocate(isolate, 0, kPropsCount);
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int next_field_offset = 0;
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for (int i = 0; i < kPropsCount; i++) {
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EmbeddedVector<char, 64> buffer;
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SNPrintF(buffer, "prop%d", i);
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Handle<String> name = factory->InternalizeUtf8String(buffer.start());
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TestPropertyKind kind = props[i];
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if (kind == PROP_CONSTANT) {
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DataConstantDescriptor d(name, func, NONE);
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descriptors->Append(&d);
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} else {
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DataDescriptor f(name, next_field_offset, NONE, representations[kind]);
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next_field_offset += f.GetDetails().field_width_in_words();
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descriptors->Append(&f);
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}
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}
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return descriptors;
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}
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TEST(LayoutDescriptorBasicFast) {
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CcTest::InitializeVM();
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v8::HandleScope scope(CcTest::isolate());
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LayoutDescriptor* layout_desc = LayoutDescriptor::FastPointerLayout();
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CHECK(!layout_desc->IsSlowLayout());
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CHECK(layout_desc->IsFastPointerLayout());
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CHECK_EQ(kSmiValueSize, layout_desc->capacity());
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for (int i = 0; i < kSmiValueSize + 13; i++) {
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CHECK_EQ(true, layout_desc->IsTagged(i));
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}
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CHECK_EQ(true, layout_desc->IsTagged(-1));
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CHECK_EQ(true, layout_desc->IsTagged(-12347));
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CHECK_EQ(true, layout_desc->IsTagged(15635));
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CHECK(layout_desc->IsFastPointerLayout());
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for (int i = 0; i < kSmiValueSize; i++) {
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layout_desc = layout_desc->SetTaggedForTesting(i, false);
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CHECK_EQ(false, layout_desc->IsTagged(i));
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layout_desc = layout_desc->SetTaggedForTesting(i, true);
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CHECK_EQ(true, layout_desc->IsTagged(i));
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}
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CHECK(layout_desc->IsFastPointerLayout());
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int sequence_length;
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CHECK_EQ(true, layout_desc->IsTagged(0, std::numeric_limits<int>::max(),
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&sequence_length));
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CHECK_EQ(std::numeric_limits<int>::max(), sequence_length);
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CHECK_EQ(true, layout_desc->IsTagged(0, 7, &sequence_length));
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CHECK_EQ(7, sequence_length);
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}
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TEST(LayoutDescriptorBasicSlow) {
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CcTest::InitializeVM();
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Isolate* isolate = CcTest::i_isolate();
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v8::HandleScope scope(CcTest::isolate());
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Handle<LayoutDescriptor> layout_descriptor;
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const int kPropsCount = kSmiValueSize * 3;
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TestPropertyKind props[kPropsCount];
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for (int i = 0; i < kPropsCount; i++) {
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// All properties tagged.
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props[i] = PROP_TAGGED;
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}
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{
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Handle<DescriptorArray> descriptors =
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CreateDescriptorArray(isolate, props, kPropsCount);
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Handle<Map> map = Map::Create(isolate, kPropsCount);
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layout_descriptor = LayoutDescriptor::New(map, descriptors, kPropsCount);
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CHECK_EQ(LayoutDescriptor::FastPointerLayout(), *layout_descriptor);
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CHECK_EQ(kSmiValueSize, layout_descriptor->capacity());
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map->InitializeDescriptors(*descriptors, *layout_descriptor);
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DCHECK(layout_descriptor->IsConsistentWithMap(*map));
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}
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props[0] = PROP_DOUBLE;
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props[kPropsCount - 1] = PROP_DOUBLE;
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Handle<DescriptorArray> descriptors =
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CreateDescriptorArray(isolate, props, kPropsCount);
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{
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int inobject_properties = kPropsCount - 1;
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Handle<Map> map = Map::Create(isolate, inobject_properties);
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// Should be fast as the only double property is the first one.
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layout_descriptor = LayoutDescriptor::New(map, descriptors, kPropsCount);
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CHECK_NE(LayoutDescriptor::FastPointerLayout(), *layout_descriptor);
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CHECK(!layout_descriptor->IsSlowLayout());
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CHECK(!layout_descriptor->IsFastPointerLayout());
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CHECK_EQ(false, layout_descriptor->IsTagged(0));
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for (int i = 1; i < kPropsCount; i++) {
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CHECK_EQ(true, layout_descriptor->IsTagged(i));
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}
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map->InitializeDescriptors(*descriptors, *layout_descriptor);
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DCHECK(layout_descriptor->IsConsistentWithMap(*map));
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}
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{
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int inobject_properties = kPropsCount;
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Handle<Map> map = Map::Create(isolate, inobject_properties);
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layout_descriptor = LayoutDescriptor::New(map, descriptors, kPropsCount);
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CHECK_NE(LayoutDescriptor::FastPointerLayout(), *layout_descriptor);
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CHECK(layout_descriptor->IsSlowLayout());
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CHECK(!layout_descriptor->IsFastPointerLayout());
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CHECK(layout_descriptor->capacity() > kSmiValueSize);
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CHECK_EQ(false, layout_descriptor->IsTagged(0));
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CHECK_EQ(false, layout_descriptor->IsTagged(kPropsCount - 1));
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for (int i = 1; i < kPropsCount - 1; i++) {
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CHECK_EQ(true, layout_descriptor->IsTagged(i));
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}
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map->InitializeDescriptors(*descriptors, *layout_descriptor);
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DCHECK(layout_descriptor->IsConsistentWithMap(*map));
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// Here we have truly slow layout descriptor, so play with the bits.
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CHECK_EQ(true, layout_descriptor->IsTagged(-1));
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CHECK_EQ(true, layout_descriptor->IsTagged(-12347));
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CHECK_EQ(true, layout_descriptor->IsTagged(15635));
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LayoutDescriptor* layout_desc = *layout_descriptor;
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// Play with the bits but leave it in consistent state with map at the end.
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for (int i = 1; i < kPropsCount - 1; i++) {
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layout_desc = layout_desc->SetTaggedForTesting(i, false);
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CHECK_EQ(false, layout_desc->IsTagged(i));
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layout_desc = layout_desc->SetTaggedForTesting(i, true);
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CHECK_EQ(true, layout_desc->IsTagged(i));
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}
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CHECK(layout_desc->IsSlowLayout());
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CHECK(!layout_desc->IsFastPointerLayout());
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DCHECK(layout_descriptor->IsConsistentWithMap(*map));
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}
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}
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static void TestLayoutDescriptorQueries(int layout_descriptor_length,
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int* bit_flip_positions,
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int max_sequence_length) {
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Handle<LayoutDescriptor> layout_descriptor = LayoutDescriptor::NewForTesting(
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CcTest::i_isolate(), layout_descriptor_length);
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layout_descriptor_length = layout_descriptor->capacity();
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LayoutDescriptor* layout_desc = *layout_descriptor;
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{
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// Fill in the layout descriptor.
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int cur_bit_flip_index = 0;
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bool tagged = true;
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for (int i = 0; i < layout_descriptor_length; i++) {
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if (i == bit_flip_positions[cur_bit_flip_index]) {
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tagged = !tagged;
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++cur_bit_flip_index;
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CHECK(i < bit_flip_positions[cur_bit_flip_index]); // check test data
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}
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layout_desc = layout_desc->SetTaggedForTesting(i, tagged);
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}
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}
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if (layout_desc->IsFastPointerLayout()) {
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return;
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}
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{
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// Check queries.
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int cur_bit_flip_index = 0;
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bool tagged = true;
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for (int i = 0; i < layout_descriptor_length; i++) {
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if (i == bit_flip_positions[cur_bit_flip_index]) {
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tagged = !tagged;
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++cur_bit_flip_index;
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}
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CHECK_EQ(tagged, layout_desc->IsTagged(i));
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int next_bit_flip_position = bit_flip_positions[cur_bit_flip_index];
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int expected_sequence_length;
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if (next_bit_flip_position < layout_desc->capacity()) {
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expected_sequence_length = next_bit_flip_position - i;
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} else {
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expected_sequence_length = tagged ? std::numeric_limits<int>::max()
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: (layout_desc->capacity() - i);
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}
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expected_sequence_length =
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Min(expected_sequence_length, max_sequence_length);
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int sequence_length;
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CHECK_EQ(tagged,
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layout_desc->IsTagged(i, max_sequence_length, &sequence_length));
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CHECK(sequence_length > 0);
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CHECK_EQ(expected_sequence_length, sequence_length);
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}
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int sequence_length;
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CHECK_EQ(true,
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layout_desc->IsTagged(layout_descriptor_length,
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max_sequence_length, &sequence_length));
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CHECK_EQ(max_sequence_length, sequence_length);
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}
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}
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static void TestLayoutDescriptorQueriesFast(int max_sequence_length) {
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{
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LayoutDescriptor* layout_desc = LayoutDescriptor::FastPointerLayout();
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int sequence_length;
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for (int i = 0; i < kNumberOfBits; i++) {
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CHECK_EQ(true,
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layout_desc->IsTagged(i, max_sequence_length, &sequence_length));
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CHECK(sequence_length > 0);
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CHECK_EQ(max_sequence_length, sequence_length);
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}
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}
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{
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int bit_flip_positions[] = {1000};
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TestLayoutDescriptorQueries(kSmiValueSize, bit_flip_positions,
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max_sequence_length);
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}
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{
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int bit_flip_positions[] = {0, 1000};
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TestLayoutDescriptorQueries(kSmiValueSize, bit_flip_positions,
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max_sequence_length);
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}
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{
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int bit_flip_positions[kNumberOfBits + 1];
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for (int i = 0; i <= kNumberOfBits; i++) {
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bit_flip_positions[i] = i;
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}
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TestLayoutDescriptorQueries(kSmiValueSize, bit_flip_positions,
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max_sequence_length);
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}
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{
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int bit_flip_positions[] = {3, 7, 8, 10, 15, 21, 30, 1000};
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TestLayoutDescriptorQueries(kSmiValueSize, bit_flip_positions,
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max_sequence_length);
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}
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{
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int bit_flip_positions[] = {0, 1, 2, 3, 5, 7, 9,
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12, 15, 18, 22, 26, 29, 1000};
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TestLayoutDescriptorQueries(kSmiValueSize, bit_flip_positions,
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max_sequence_length);
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}
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}
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TEST(LayoutDescriptorQueriesFastLimited7) {
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CcTest::InitializeVM();
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v8::HandleScope scope(CcTest::isolate());
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TestLayoutDescriptorQueriesFast(7);
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}
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TEST(LayoutDescriptorQueriesFastLimited13) {
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CcTest::InitializeVM();
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v8::HandleScope scope(CcTest::isolate());
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TestLayoutDescriptorQueriesFast(13);
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}
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TEST(LayoutDescriptorQueriesFastUnlimited) {
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CcTest::InitializeVM();
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v8::HandleScope scope(CcTest::isolate());
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TestLayoutDescriptorQueriesFast(std::numeric_limits<int>::max());
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}
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static void TestLayoutDescriptorQueriesSlow(int max_sequence_length) {
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{
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int bit_flip_positions[] = {10000};
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TestLayoutDescriptorQueries(kMaxNumberOfDescriptors, bit_flip_positions,
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max_sequence_length);
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}
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{
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int bit_flip_positions[] = {0, 10000};
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TestLayoutDescriptorQueries(kMaxNumberOfDescriptors, bit_flip_positions,
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max_sequence_length);
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}
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{
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int bit_flip_positions[kMaxNumberOfDescriptors + 1];
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for (int i = 0; i < kMaxNumberOfDescriptors; i++) {
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bit_flip_positions[i] = i;
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}
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bit_flip_positions[kMaxNumberOfDescriptors] = 10000;
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TestLayoutDescriptorQueries(kMaxNumberOfDescriptors, bit_flip_positions,
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max_sequence_length);
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}
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{
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int bit_flip_positions[] = {3, 7, 8, 10, 15, 21, 30,
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37, 54, 80, 99, 383, 10000};
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TestLayoutDescriptorQueries(kMaxNumberOfDescriptors, bit_flip_positions,
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max_sequence_length);
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}
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{
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int bit_flip_positions[] = {0, 10, 20, 30, 50, 70, 90,
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120, 150, 180, 220, 260, 290, 10000};
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TestLayoutDescriptorQueries(kMaxNumberOfDescriptors, bit_flip_positions,
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max_sequence_length);
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}
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{
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int bit_flip_positions[kMaxNumberOfDescriptors + 1];
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int cur = 0;
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for (int i = 0; i < kMaxNumberOfDescriptors; i++) {
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bit_flip_positions[i] = cur;
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cur = (cur + 1) * 2;
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}
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CHECK(cur < 10000);
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bit_flip_positions[kMaxNumberOfDescriptors] = 10000;
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TestLayoutDescriptorQueries(kMaxNumberOfDescriptors, bit_flip_positions,
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max_sequence_length);
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}
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{
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int bit_flip_positions[kMaxNumberOfDescriptors + 1];
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int cur = 3;
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for (int i = 0; i < kMaxNumberOfDescriptors; i++) {
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bit_flip_positions[i] = cur;
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cur = (cur + 1) * 2;
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}
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CHECK(cur < 10000);
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bit_flip_positions[kMaxNumberOfDescriptors] = 10000;
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TestLayoutDescriptorQueries(kMaxNumberOfDescriptors, bit_flip_positions,
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max_sequence_length);
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}
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}
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TEST(LayoutDescriptorQueriesSlowLimited7) {
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CcTest::InitializeVM();
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v8::HandleScope scope(CcTest::isolate());
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TestLayoutDescriptorQueriesSlow(7);
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}
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TEST(LayoutDescriptorQueriesSlowLimited13) {
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CcTest::InitializeVM();
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v8::HandleScope scope(CcTest::isolate());
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TestLayoutDescriptorQueriesSlow(13);
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}
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TEST(LayoutDescriptorQueriesSlowLimited42) {
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CcTest::InitializeVM();
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v8::HandleScope scope(CcTest::isolate());
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TestLayoutDescriptorQueriesSlow(42);
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}
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TEST(LayoutDescriptorQueriesSlowUnlimited) {
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CcTest::InitializeVM();
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v8::HandleScope scope(CcTest::isolate());
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TestLayoutDescriptorQueriesSlow(std::numeric_limits<int>::max());
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}
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TEST(LayoutDescriptorCreateNewFast) {
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CcTest::InitializeVM();
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Isolate* isolate = CcTest::i_isolate();
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v8::HandleScope scope(CcTest::isolate());
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Handle<LayoutDescriptor> layout_descriptor;
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TestPropertyKind props[] = {
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PROP_CONSTANT,
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PROP_TAGGED, // field #0
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PROP_CONSTANT,
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PROP_DOUBLE, // field #1
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PROP_CONSTANT,
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PROP_TAGGED, // field #2
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PROP_CONSTANT,
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};
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const int kPropsCount = arraysize(props);
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Handle<DescriptorArray> descriptors =
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CreateDescriptorArray(isolate, props, kPropsCount);
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{
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Handle<Map> map = Map::Create(isolate, 0);
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layout_descriptor = LayoutDescriptor::New(map, descriptors, kPropsCount);
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CHECK_EQ(LayoutDescriptor::FastPointerLayout(), *layout_descriptor);
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map->InitializeDescriptors(*descriptors, *layout_descriptor);
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DCHECK(layout_descriptor->IsConsistentWithMap(*map));
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}
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{
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Handle<Map> map = Map::Create(isolate, 1);
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layout_descriptor = LayoutDescriptor::New(map, descriptors, kPropsCount);
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CHECK_EQ(LayoutDescriptor::FastPointerLayout(), *layout_descriptor);
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map->InitializeDescriptors(*descriptors, *layout_descriptor);
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DCHECK(layout_descriptor->IsConsistentWithMap(*map));
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}
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{
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Handle<Map> map = Map::Create(isolate, 2);
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layout_descriptor = LayoutDescriptor::New(map, descriptors, kPropsCount);
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CHECK_NE(LayoutDescriptor::FastPointerLayout(), *layout_descriptor);
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CHECK(!layout_descriptor->IsSlowLayout());
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CHECK_EQ(true, layout_descriptor->IsTagged(0));
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CHECK_EQ(false, layout_descriptor->IsTagged(1));
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CHECK_EQ(true, layout_descriptor->IsTagged(2));
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CHECK_EQ(true, layout_descriptor->IsTagged(125));
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map->InitializeDescriptors(*descriptors, *layout_descriptor);
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DCHECK(layout_descriptor->IsConsistentWithMap(*map));
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}
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}
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TEST(LayoutDescriptorCreateNewSlow) {
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CcTest::InitializeVM();
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Isolate* isolate = CcTest::i_isolate();
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v8::HandleScope scope(CcTest::isolate());
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Handle<LayoutDescriptor> layout_descriptor;
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const int kPropsCount = kSmiValueSize * 3;
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TestPropertyKind props[kPropsCount];
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for (int i = 0; i < kPropsCount; i++) {
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props[i] = static_cast<TestPropertyKind>(i % PROP_KIND_NUMBER);
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}
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|
Handle<DescriptorArray> descriptors =
|
|
CreateDescriptorArray(isolate, props, kPropsCount);
|
|
|
|
{
|
|
Handle<Map> map = Map::Create(isolate, 0);
|
|
layout_descriptor = LayoutDescriptor::New(map, descriptors, kPropsCount);
|
|
CHECK_EQ(LayoutDescriptor::FastPointerLayout(), *layout_descriptor);
|
|
map->InitializeDescriptors(*descriptors, *layout_descriptor);
|
|
DCHECK(layout_descriptor->IsConsistentWithMap(*map));
|
|
}
|
|
|
|
{
|
|
Handle<Map> map = Map::Create(isolate, 1);
|
|
layout_descriptor = LayoutDescriptor::New(map, descriptors, kPropsCount);
|
|
CHECK_EQ(LayoutDescriptor::FastPointerLayout(), *layout_descriptor);
|
|
map->InitializeDescriptors(*descriptors, *layout_descriptor);
|
|
DCHECK(layout_descriptor->IsConsistentWithMap(*map));
|
|
}
|
|
|
|
{
|
|
Handle<Map> map = Map::Create(isolate, 2);
|
|
layout_descriptor = LayoutDescriptor::New(map, descriptors, kPropsCount);
|
|
CHECK_NE(LayoutDescriptor::FastPointerLayout(), *layout_descriptor);
|
|
CHECK(!layout_descriptor->IsSlowLayout());
|
|
CHECK_EQ(true, layout_descriptor->IsTagged(0));
|
|
CHECK_EQ(false, layout_descriptor->IsTagged(1));
|
|
CHECK_EQ(true, layout_descriptor->IsTagged(2));
|
|
CHECK_EQ(true, layout_descriptor->IsTagged(125));
|
|
map->InitializeDescriptors(*descriptors, *layout_descriptor);
|
|
DCHECK(layout_descriptor->IsConsistentWithMap(*map));
|
|
}
|
|
|
|
{
|
|
int inobject_properties = kPropsCount / 2;
|
|
Handle<Map> map = Map::Create(isolate, inobject_properties);
|
|
layout_descriptor = LayoutDescriptor::New(map, descriptors, kPropsCount);
|
|
CHECK_NE(LayoutDescriptor::FastPointerLayout(), *layout_descriptor);
|
|
CHECK(layout_descriptor->IsSlowLayout());
|
|
for (int i = 0; i < inobject_properties; i++) {
|
|
// PROP_DOUBLE has index 1 among DATA properties.
|
|
const bool tagged = (i % (PROP_KIND_NUMBER - 1)) != 1;
|
|
CHECK_EQ(tagged, layout_descriptor->IsTagged(i));
|
|
}
|
|
// Every property after inobject_properties must be tagged.
|
|
for (int i = inobject_properties; i < kPropsCount; i++) {
|
|
CHECK_EQ(true, layout_descriptor->IsTagged(i));
|
|
}
|
|
map->InitializeDescriptors(*descriptors, *layout_descriptor);
|
|
DCHECK(layout_descriptor->IsConsistentWithMap(*map));
|
|
|
|
// Now test LayoutDescriptor::cast_gc_safe().
|
|
Handle<LayoutDescriptor> layout_descriptor_copy =
|
|
LayoutDescriptor::New(map, descriptors, kPropsCount);
|
|
|
|
LayoutDescriptor* layout_desc = *layout_descriptor;
|
|
CHECK_EQ(layout_desc, LayoutDescriptor::cast(layout_desc));
|
|
CHECK_EQ(layout_desc, LayoutDescriptor::cast_gc_safe(layout_desc));
|
|
CHECK(layout_descriptor->IsFixedTypedArrayBase());
|
|
// Now make it look like a forwarding pointer to layout_descriptor_copy.
|
|
MapWord map_word = layout_desc->map_word();
|
|
CHECK(!map_word.IsForwardingAddress());
|
|
layout_desc->set_map_word(
|
|
MapWord::FromForwardingAddress(*layout_descriptor_copy));
|
|
CHECK(layout_desc->map_word().IsForwardingAddress());
|
|
CHECK_EQ(*layout_descriptor_copy,
|
|
LayoutDescriptor::cast_gc_safe(layout_desc));
|
|
|
|
// Restore it back.
|
|
layout_desc->set_map_word(map_word);
|
|
CHECK_EQ(layout_desc, LayoutDescriptor::cast(layout_desc));
|
|
}
|
|
}
|
|
|
|
|
|
static Handle<LayoutDescriptor> TestLayoutDescriptorAppend(
|
|
Isolate* isolate, int inobject_properties, TestPropertyKind* props,
|
|
int kPropsCount) {
|
|
Factory* factory = isolate->factory();
|
|
|
|
Handle<String> func_name = factory->InternalizeUtf8String("func");
|
|
Handle<JSFunction> func = factory->NewFunction(func_name);
|
|
|
|
Handle<DescriptorArray> descriptors =
|
|
DescriptorArray::Allocate(isolate, 0, kPropsCount);
|
|
|
|
Handle<Map> map = Map::Create(isolate, inobject_properties);
|
|
map->InitializeDescriptors(*descriptors,
|
|
LayoutDescriptor::FastPointerLayout());
|
|
|
|
int next_field_offset = 0;
|
|
for (int i = 0; i < kPropsCount; i++) {
|
|
EmbeddedVector<char, 64> buffer;
|
|
SNPrintF(buffer, "prop%d", i);
|
|
Handle<String> name = factory->InternalizeUtf8String(buffer.start());
|
|
|
|
Handle<LayoutDescriptor> layout_descriptor;
|
|
TestPropertyKind kind = props[i];
|
|
if (kind == PROP_CONSTANT) {
|
|
DataConstantDescriptor d(name, func, NONE);
|
|
layout_descriptor = LayoutDescriptor::Append(map, d.GetDetails());
|
|
descriptors->Append(&d);
|
|
|
|
} else {
|
|
DataDescriptor f(name, next_field_offset, NONE, representations[kind]);
|
|
int field_width_in_words = f.GetDetails().field_width_in_words();
|
|
next_field_offset += field_width_in_words;
|
|
layout_descriptor = LayoutDescriptor::Append(map, f.GetDetails());
|
|
descriptors->Append(&f);
|
|
|
|
int field_index = f.GetDetails().field_index();
|
|
bool is_inobject = field_index < map->inobject_properties();
|
|
for (int bit = 0; bit < field_width_in_words; bit++) {
|
|
CHECK_EQ(is_inobject && (kind == PROP_DOUBLE),
|
|
!layout_descriptor->IsTagged(field_index + bit));
|
|
}
|
|
CHECK(layout_descriptor->IsTagged(next_field_offset));
|
|
}
|
|
map->InitializeDescriptors(*descriptors, *layout_descriptor);
|
|
}
|
|
Handle<LayoutDescriptor> layout_descriptor(map->layout_descriptor(), isolate);
|
|
DCHECK(layout_descriptor->IsConsistentWithMap(*map));
|
|
return layout_descriptor;
|
|
}
|
|
|
|
|
|
TEST(LayoutDescriptorAppend) {
|
|
CcTest::InitializeVM();
|
|
Isolate* isolate = CcTest::i_isolate();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
Handle<LayoutDescriptor> layout_descriptor;
|
|
const int kPropsCount = kSmiValueSize * 3;
|
|
TestPropertyKind props[kPropsCount];
|
|
for (int i = 0; i < kPropsCount; i++) {
|
|
props[i] = static_cast<TestPropertyKind>(i % PROP_KIND_NUMBER);
|
|
}
|
|
|
|
layout_descriptor =
|
|
TestLayoutDescriptorAppend(isolate, 0, props, kPropsCount);
|
|
CHECK(!layout_descriptor->IsSlowLayout());
|
|
|
|
layout_descriptor =
|
|
TestLayoutDescriptorAppend(isolate, 13, props, kPropsCount);
|
|
CHECK(!layout_descriptor->IsSlowLayout());
|
|
|
|
layout_descriptor =
|
|
TestLayoutDescriptorAppend(isolate, kSmiValueSize, props, kPropsCount);
|
|
CHECK(!layout_descriptor->IsSlowLayout());
|
|
|
|
layout_descriptor = TestLayoutDescriptorAppend(isolate, kSmiValueSize * 2,
|
|
props, kPropsCount);
|
|
CHECK(layout_descriptor->IsSlowLayout());
|
|
|
|
layout_descriptor =
|
|
TestLayoutDescriptorAppend(isolate, kPropsCount, props, kPropsCount);
|
|
CHECK(layout_descriptor->IsSlowLayout());
|
|
}
|
|
|
|
|
|
TEST(LayoutDescriptorAppendAllDoubles) {
|
|
CcTest::InitializeVM();
|
|
Isolate* isolate = CcTest::i_isolate();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
Handle<LayoutDescriptor> layout_descriptor;
|
|
const int kPropsCount = kSmiValueSize * 3;
|
|
TestPropertyKind props[kPropsCount];
|
|
for (int i = 0; i < kPropsCount; i++) {
|
|
props[i] = PROP_DOUBLE;
|
|
}
|
|
|
|
layout_descriptor =
|
|
TestLayoutDescriptorAppend(isolate, 0, props, kPropsCount);
|
|
CHECK(!layout_descriptor->IsSlowLayout());
|
|
|
|
layout_descriptor =
|
|
TestLayoutDescriptorAppend(isolate, 13, props, kPropsCount);
|
|
CHECK(!layout_descriptor->IsSlowLayout());
|
|
|
|
layout_descriptor =
|
|
TestLayoutDescriptorAppend(isolate, kSmiValueSize, props, kPropsCount);
|
|
CHECK(!layout_descriptor->IsSlowLayout());
|
|
|
|
layout_descriptor = TestLayoutDescriptorAppend(isolate, kSmiValueSize + 1,
|
|
props, kPropsCount);
|
|
CHECK(layout_descriptor->IsSlowLayout());
|
|
|
|
layout_descriptor = TestLayoutDescriptorAppend(isolate, kSmiValueSize * 2,
|
|
props, kPropsCount);
|
|
CHECK(layout_descriptor->IsSlowLayout());
|
|
|
|
layout_descriptor =
|
|
TestLayoutDescriptorAppend(isolate, kPropsCount, props, kPropsCount);
|
|
CHECK(layout_descriptor->IsSlowLayout());
|
|
|
|
{
|
|
// Ensure layout descriptor switches into slow mode at the right moment.
|
|
layout_descriptor =
|
|
TestLayoutDescriptorAppend(isolate, kPropsCount, props, kSmiValueSize);
|
|
CHECK(!layout_descriptor->IsSlowLayout());
|
|
|
|
layout_descriptor = TestLayoutDescriptorAppend(isolate, kPropsCount, props,
|
|
kSmiValueSize + 1);
|
|
CHECK(layout_descriptor->IsSlowLayout());
|
|
}
|
|
}
|
|
|
|
|
|
static Handle<LayoutDescriptor> TestLayoutDescriptorAppendIfFastOrUseFull(
|
|
Isolate* isolate, int inobject_properties,
|
|
Handle<DescriptorArray> descriptors, int number_of_descriptors) {
|
|
Handle<Map> map = Map::Create(isolate, inobject_properties);
|
|
|
|
Handle<LayoutDescriptor> full_layout_descriptor = LayoutDescriptor::New(
|
|
map, descriptors, descriptors->number_of_descriptors());
|
|
|
|
int nof = 0;
|
|
bool switched_to_slow_mode = false;
|
|
|
|
for (int i = 0; i < number_of_descriptors; i++) {
|
|
PropertyDetails details = descriptors->GetDetails(i);
|
|
|
|
// This method calls LayoutDescriptor::AppendIfFastOrUseFull() internally
|
|
// and does all the required map-descriptors related book keeping.
|
|
map = Map::CopyInstallDescriptorsForTesting(map, i, descriptors,
|
|
full_layout_descriptor);
|
|
|
|
LayoutDescriptor* layout_desc = map->layout_descriptor();
|
|
|
|
if (layout_desc->IsSlowLayout()) {
|
|
switched_to_slow_mode = true;
|
|
CHECK_EQ(*full_layout_descriptor, layout_desc);
|
|
} else {
|
|
CHECK(!switched_to_slow_mode);
|
|
if (details.type() == DATA) {
|
|
nof++;
|
|
int field_index = details.field_index();
|
|
int field_width_in_words = details.field_width_in_words();
|
|
|
|
bool is_inobject = field_index < map->inobject_properties();
|
|
for (int bit = 0; bit < field_width_in_words; bit++) {
|
|
CHECK_EQ(is_inobject && details.representation().IsDouble(),
|
|
!layout_desc->IsTagged(field_index + bit));
|
|
}
|
|
CHECK(layout_desc->IsTagged(field_index + field_width_in_words));
|
|
}
|
|
}
|
|
DCHECK(map->layout_descriptor()->IsConsistentWithMap(*map));
|
|
}
|
|
|
|
Handle<LayoutDescriptor> layout_descriptor(map->GetLayoutDescriptor(),
|
|
isolate);
|
|
DCHECK(layout_descriptor->IsConsistentWithMap(*map));
|
|
return layout_descriptor;
|
|
}
|
|
|
|
|
|
TEST(LayoutDescriptorAppendIfFastOrUseFull) {
|
|
CcTest::InitializeVM();
|
|
Isolate* isolate = CcTest::i_isolate();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
Handle<LayoutDescriptor> layout_descriptor;
|
|
const int kPropsCount = kSmiValueSize * 3;
|
|
TestPropertyKind props[kPropsCount];
|
|
for (int i = 0; i < kPropsCount; i++) {
|
|
props[i] = static_cast<TestPropertyKind>(i % PROP_KIND_NUMBER);
|
|
}
|
|
Handle<DescriptorArray> descriptors =
|
|
CreateDescriptorArray(isolate, props, kPropsCount);
|
|
|
|
layout_descriptor = TestLayoutDescriptorAppendIfFastOrUseFull(
|
|
isolate, 0, descriptors, kPropsCount);
|
|
CHECK(!layout_descriptor->IsSlowLayout());
|
|
|
|
layout_descriptor = TestLayoutDescriptorAppendIfFastOrUseFull(
|
|
isolate, 13, descriptors, kPropsCount);
|
|
CHECK(!layout_descriptor->IsSlowLayout());
|
|
|
|
layout_descriptor = TestLayoutDescriptorAppendIfFastOrUseFull(
|
|
isolate, kSmiValueSize, descriptors, kPropsCount);
|
|
CHECK(!layout_descriptor->IsSlowLayout());
|
|
|
|
layout_descriptor = TestLayoutDescriptorAppendIfFastOrUseFull(
|
|
isolate, kSmiValueSize * 2, descriptors, kPropsCount);
|
|
CHECK(layout_descriptor->IsSlowLayout());
|
|
|
|
layout_descriptor = TestLayoutDescriptorAppendIfFastOrUseFull(
|
|
isolate, kPropsCount, descriptors, kPropsCount);
|
|
CHECK(layout_descriptor->IsSlowLayout());
|
|
}
|
|
|
|
|
|
TEST(LayoutDescriptorAppendIfFastOrUseFullAllDoubles) {
|
|
CcTest::InitializeVM();
|
|
Isolate* isolate = CcTest::i_isolate();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
Handle<LayoutDescriptor> layout_descriptor;
|
|
const int kPropsCount = kSmiValueSize * 3;
|
|
TestPropertyKind props[kPropsCount];
|
|
for (int i = 0; i < kPropsCount; i++) {
|
|
props[i] = PROP_DOUBLE;
|
|
}
|
|
Handle<DescriptorArray> descriptors =
|
|
CreateDescriptorArray(isolate, props, kPropsCount);
|
|
|
|
layout_descriptor = TestLayoutDescriptorAppendIfFastOrUseFull(
|
|
isolate, 0, descriptors, kPropsCount);
|
|
CHECK(!layout_descriptor->IsSlowLayout());
|
|
|
|
layout_descriptor = TestLayoutDescriptorAppendIfFastOrUseFull(
|
|
isolate, 13, descriptors, kPropsCount);
|
|
CHECK(!layout_descriptor->IsSlowLayout());
|
|
|
|
layout_descriptor = TestLayoutDescriptorAppendIfFastOrUseFull(
|
|
isolate, kSmiValueSize, descriptors, kPropsCount);
|
|
CHECK(!layout_descriptor->IsSlowLayout());
|
|
|
|
layout_descriptor = TestLayoutDescriptorAppendIfFastOrUseFull(
|
|
isolate, kSmiValueSize + 1, descriptors, kPropsCount);
|
|
CHECK(layout_descriptor->IsSlowLayout());
|
|
|
|
layout_descriptor = TestLayoutDescriptorAppendIfFastOrUseFull(
|
|
isolate, kSmiValueSize * 2, descriptors, kPropsCount);
|
|
CHECK(layout_descriptor->IsSlowLayout());
|
|
|
|
layout_descriptor = TestLayoutDescriptorAppendIfFastOrUseFull(
|
|
isolate, kPropsCount, descriptors, kPropsCount);
|
|
CHECK(layout_descriptor->IsSlowLayout());
|
|
|
|
{
|
|
// Ensure layout descriptor switches into slow mode at the right moment.
|
|
layout_descriptor = TestLayoutDescriptorAppendIfFastOrUseFull(
|
|
isolate, kPropsCount, descriptors, kSmiValueSize);
|
|
CHECK(!layout_descriptor->IsSlowLayout());
|
|
|
|
layout_descriptor = TestLayoutDescriptorAppendIfFastOrUseFull(
|
|
isolate, kPropsCount, descriptors, kSmiValueSize + 1);
|
|
CHECK(layout_descriptor->IsSlowLayout());
|
|
}
|
|
}
|
|
|
|
|
|
TEST(Regress436816) {
|
|
CcTest::InitializeVM();
|
|
Isolate* isolate = CcTest::i_isolate();
|
|
Factory* factory = isolate->factory();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
const int kPropsCount = kSmiValueSize * 3;
|
|
TestPropertyKind props[kPropsCount];
|
|
for (int i = 0; i < kPropsCount; i++) {
|
|
props[i] = PROP_DOUBLE;
|
|
}
|
|
Handle<DescriptorArray> descriptors =
|
|
CreateDescriptorArray(isolate, props, kPropsCount);
|
|
|
|
Handle<Map> map = Map::Create(isolate, kPropsCount);
|
|
Handle<LayoutDescriptor> layout_descriptor =
|
|
LayoutDescriptor::New(map, descriptors, kPropsCount);
|
|
map->InitializeDescriptors(*descriptors, *layout_descriptor);
|
|
|
|
Handle<JSObject> object = factory->NewJSObjectFromMap(map, TENURED);
|
|
|
|
Address fake_address = reinterpret_cast<Address>(~kHeapObjectTagMask);
|
|
HeapObject* fake_object = HeapObject::FromAddress(fake_address);
|
|
CHECK(fake_object->IsHeapObject());
|
|
|
|
double boom_value = bit_cast<double>(fake_object);
|
|
for (int i = 0; i < kPropsCount; i++) {
|
|
FieldIndex index = FieldIndex::ForDescriptor(*map, i);
|
|
CHECK(map->IsUnboxedDoubleField(index));
|
|
object->RawFastDoublePropertyAtPut(index, boom_value);
|
|
}
|
|
CHECK(object->HasFastProperties());
|
|
CHECK(!object->map()->HasFastPointerLayout());
|
|
|
|
Handle<Map> normalized_map =
|
|
Map::Normalize(map, KEEP_INOBJECT_PROPERTIES, "testing");
|
|
JSObject::MigrateToMap(object, normalized_map);
|
|
CHECK(!object->HasFastProperties());
|
|
CHECK(object->map()->HasFastPointerLayout());
|
|
|
|
// Trigger GCs and heap verification.
|
|
CcTest::heap()->CollectAllGarbage(i::Heap::kNoGCFlags);
|
|
}
|
|
|
|
|
|
TEST(DoScavenge) {
|
|
CcTest::InitializeVM();
|
|
Isolate* isolate = CcTest::i_isolate();
|
|
Factory* factory = isolate->factory();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
CompileRun(
|
|
"function A() {"
|
|
" this.x = 42.5;"
|
|
" this.o = {};"
|
|
"};"
|
|
"var o = new A();");
|
|
|
|
Handle<String> obj_name = factory->InternalizeUtf8String("o");
|
|
|
|
Handle<Object> obj_value =
|
|
Object::GetProperty(isolate->global_object(), obj_name).ToHandleChecked();
|
|
CHECK(obj_value->IsJSObject());
|
|
Handle<JSObject> obj = Handle<JSObject>::cast(obj_value);
|
|
|
|
{
|
|
// Ensure the object is properly set up.
|
|
Map* map = obj->map();
|
|
DescriptorArray* descriptors = map->instance_descriptors();
|
|
CHECK(map->NumberOfOwnDescriptors() == 2);
|
|
CHECK(descriptors->GetDetails(0).representation().IsDouble());
|
|
CHECK(descriptors->GetDetails(1).representation().IsHeapObject());
|
|
FieldIndex field_index = FieldIndex::ForDescriptor(map, 0);
|
|
CHECK(field_index.is_inobject() && field_index.is_double());
|
|
CHECK_EQ(FLAG_unbox_double_fields, map->IsUnboxedDoubleField(field_index));
|
|
CHECK_EQ(42.5, GetDoubleFieldValue(*obj, field_index));
|
|
}
|
|
CHECK(isolate->heap()->new_space()->Contains(*obj));
|
|
|
|
// Trigger GCs so that the newly allocated object moves to old gen.
|
|
CcTest::heap()->CollectGarbage(i::NEW_SPACE); // in survivor space now
|
|
|
|
// Create temp object in the new space.
|
|
Handle<JSArray> temp = factory->NewJSArray(FAST_ELEMENTS, NOT_TENURED);
|
|
CHECK(isolate->heap()->new_space()->Contains(*temp));
|
|
|
|
// 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>(*temp) + kPointerSize;
|
|
double boom_value = bit_cast<double>(fake_object);
|
|
|
|
FieldIndex field_index = FieldIndex::ForDescriptor(obj->map(), 0);
|
|
Handle<HeapNumber> boom_number = factory->NewHeapNumber(boom_value, MUTABLE);
|
|
obj->FastPropertyAtPut(field_index, *boom_number);
|
|
|
|
// Now the object moves to old gen and it has a double field that looks like
|
|
// a pointer to a from semi-space.
|
|
CcTest::heap()->CollectGarbage(i::NEW_SPACE); // in old gen now
|
|
|
|
CHECK(isolate->heap()->old_pointer_space()->Contains(*obj));
|
|
|
|
CHECK_EQ(boom_value, GetDoubleFieldValue(*obj, field_index));
|
|
}
|
|
|
|
|
|
static void TestLayoutDescriptorHelper(Isolate* isolate,
|
|
int inobject_properties,
|
|
Handle<DescriptorArray> descriptors,
|
|
int number_of_descriptors) {
|
|
Handle<Map> map = Map::Create(isolate, inobject_properties);
|
|
|
|
Handle<LayoutDescriptor> layout_descriptor = LayoutDescriptor::New(
|
|
map, descriptors, descriptors->number_of_descriptors());
|
|
map->InitializeDescriptors(*descriptors, *layout_descriptor);
|
|
DCHECK(layout_descriptor->IsConsistentWithMap(*map));
|
|
|
|
LayoutDescriptorHelper helper(*map);
|
|
bool all_fields_tagged = true;
|
|
|
|
int instance_size = map->instance_size();
|
|
|
|
int end_offset = instance_size * 2;
|
|
int first_non_tagged_field_offset = end_offset;
|
|
for (int i = 0; i < number_of_descriptors; i++) {
|
|
PropertyDetails details = descriptors->GetDetails(i);
|
|
if (details.type() != DATA) continue;
|
|
FieldIndex index = FieldIndex::ForDescriptor(*map, i);
|
|
if (!index.is_inobject()) continue;
|
|
all_fields_tagged &= !details.representation().IsDouble();
|
|
bool expected_tagged = !index.is_double();
|
|
if (!expected_tagged) {
|
|
first_non_tagged_field_offset =
|
|
Min(first_non_tagged_field_offset, index.offset());
|
|
}
|
|
|
|
int end_of_region_offset;
|
|
CHECK_EQ(expected_tagged, helper.IsTagged(index.offset()));
|
|
CHECK_EQ(expected_tagged, helper.IsTagged(index.offset(), instance_size,
|
|
&end_of_region_offset));
|
|
CHECK(end_of_region_offset > 0);
|
|
CHECK(end_of_region_offset % kPointerSize == 0);
|
|
CHECK(end_of_region_offset <= instance_size);
|
|
|
|
for (int offset = index.offset(); offset < end_of_region_offset;
|
|
offset += kPointerSize) {
|
|
CHECK_EQ(expected_tagged, helper.IsTagged(index.offset()));
|
|
}
|
|
if (end_of_region_offset < instance_size) {
|
|
CHECK_EQ(!expected_tagged, helper.IsTagged(end_of_region_offset));
|
|
} else {
|
|
CHECK_EQ(true, helper.IsTagged(end_of_region_offset));
|
|
}
|
|
}
|
|
|
|
for (int offset = 0; offset < JSObject::kHeaderSize; offset += kPointerSize) {
|
|
// Header queries
|
|
CHECK_EQ(true, helper.IsTagged(offset));
|
|
int end_of_region_offset;
|
|
CHECK_EQ(true, helper.IsTagged(offset, end_offset, &end_of_region_offset));
|
|
CHECK_EQ(first_non_tagged_field_offset, end_of_region_offset);
|
|
|
|
// Out of bounds queries
|
|
CHECK_EQ(true, helper.IsTagged(offset + instance_size));
|
|
}
|
|
|
|
CHECK_EQ(all_fields_tagged, helper.all_fields_tagged());
|
|
}
|
|
|
|
|
|
TEST(LayoutDescriptorHelperMixed) {
|
|
CcTest::InitializeVM();
|
|
Isolate* isolate = CcTest::i_isolate();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
Handle<LayoutDescriptor> layout_descriptor;
|
|
const int kPropsCount = kSmiValueSize * 3;
|
|
TestPropertyKind props[kPropsCount];
|
|
for (int i = 0; i < kPropsCount; i++) {
|
|
props[i] = static_cast<TestPropertyKind>(i % PROP_KIND_NUMBER);
|
|
}
|
|
Handle<DescriptorArray> descriptors =
|
|
CreateDescriptorArray(isolate, props, kPropsCount);
|
|
|
|
TestLayoutDescriptorHelper(isolate, 0, descriptors, kPropsCount);
|
|
|
|
TestLayoutDescriptorHelper(isolate, 13, descriptors, kPropsCount);
|
|
|
|
TestLayoutDescriptorHelper(isolate, kSmiValueSize, descriptors, kPropsCount);
|
|
|
|
TestLayoutDescriptorHelper(isolate, kSmiValueSize * 2, descriptors,
|
|
kPropsCount);
|
|
|
|
TestLayoutDescriptorHelper(isolate, kPropsCount, descriptors, kPropsCount);
|
|
}
|
|
|
|
|
|
TEST(LayoutDescriptorHelperAllTagged) {
|
|
CcTest::InitializeVM();
|
|
Isolate* isolate = CcTest::i_isolate();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
Handle<LayoutDescriptor> layout_descriptor;
|
|
const int kPropsCount = kSmiValueSize * 3;
|
|
TestPropertyKind props[kPropsCount];
|
|
for (int i = 0; i < kPropsCount; i++) {
|
|
props[i] = PROP_TAGGED;
|
|
}
|
|
Handle<DescriptorArray> descriptors =
|
|
CreateDescriptorArray(isolate, props, kPropsCount);
|
|
|
|
TestLayoutDescriptorHelper(isolate, 0, descriptors, kPropsCount);
|
|
|
|
TestLayoutDescriptorHelper(isolate, 13, descriptors, kPropsCount);
|
|
|
|
TestLayoutDescriptorHelper(isolate, kSmiValueSize, descriptors, kPropsCount);
|
|
|
|
TestLayoutDescriptorHelper(isolate, kSmiValueSize * 2, descriptors,
|
|
kPropsCount);
|
|
|
|
TestLayoutDescriptorHelper(isolate, kPropsCount, descriptors, kPropsCount);
|
|
}
|
|
|
|
|
|
TEST(LayoutDescriptorHelperAllDoubles) {
|
|
CcTest::InitializeVM();
|
|
Isolate* isolate = CcTest::i_isolate();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
Handle<LayoutDescriptor> layout_descriptor;
|
|
const int kPropsCount = kSmiValueSize * 3;
|
|
TestPropertyKind props[kPropsCount];
|
|
for (int i = 0; i < kPropsCount; i++) {
|
|
props[i] = PROP_DOUBLE;
|
|
}
|
|
Handle<DescriptorArray> descriptors =
|
|
CreateDescriptorArray(isolate, props, kPropsCount);
|
|
|
|
TestLayoutDescriptorHelper(isolate, 0, descriptors, kPropsCount);
|
|
|
|
TestLayoutDescriptorHelper(isolate, 13, descriptors, kPropsCount);
|
|
|
|
TestLayoutDescriptorHelper(isolate, kSmiValueSize, descriptors, kPropsCount);
|
|
|
|
TestLayoutDescriptorHelper(isolate, kSmiValueSize * 2, descriptors,
|
|
kPropsCount);
|
|
|
|
TestLayoutDescriptorHelper(isolate, kPropsCount, descriptors, kPropsCount);
|
|
}
|
|
|
|
|
|
TEST(StoreBufferScanOnScavenge) {
|
|
CcTest::InitializeVM();
|
|
Isolate* isolate = CcTest::i_isolate();
|
|
Factory* factory = isolate->factory();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
CompileRun(
|
|
"function A() {"
|
|
" this.x = 42.5;"
|
|
" this.o = {};"
|
|
"};"
|
|
"var o = new A();");
|
|
|
|
Handle<String> obj_name = factory->InternalizeUtf8String("o");
|
|
|
|
Handle<Object> obj_value =
|
|
Object::GetProperty(isolate->global_object(), obj_name).ToHandleChecked();
|
|
CHECK(obj_value->IsJSObject());
|
|
Handle<JSObject> obj = Handle<JSObject>::cast(obj_value);
|
|
|
|
{
|
|
// Ensure the object is properly set up.
|
|
Map* map = obj->map();
|
|
DescriptorArray* descriptors = map->instance_descriptors();
|
|
CHECK(map->NumberOfOwnDescriptors() == 2);
|
|
CHECK(descriptors->GetDetails(0).representation().IsDouble());
|
|
CHECK(descriptors->GetDetails(1).representation().IsHeapObject());
|
|
FieldIndex field_index = FieldIndex::ForDescriptor(map, 0);
|
|
CHECK(field_index.is_inobject() && field_index.is_double());
|
|
CHECK_EQ(FLAG_unbox_double_fields, map->IsUnboxedDoubleField(field_index));
|
|
CHECK_EQ(42.5, GetDoubleFieldValue(*obj, field_index));
|
|
}
|
|
CHECK(isolate->heap()->new_space()->Contains(*obj));
|
|
|
|
// Trigger GCs so that the newly allocated object moves to old gen.
|
|
CcTest::heap()->CollectGarbage(i::NEW_SPACE); // in survivor space now
|
|
CcTest::heap()->CollectGarbage(i::NEW_SPACE); // in old gen now
|
|
|
|
CHECK(isolate->heap()->old_pointer_space()->Contains(*obj));
|
|
|
|
// Create temp object in the new space.
|
|
Handle<JSArray> temp = factory->NewJSArray(FAST_ELEMENTS, NOT_TENURED);
|
|
CHECK(isolate->heap()->new_space()->Contains(*temp));
|
|
|
|
// 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>(*temp) + kPointerSize;
|
|
double boom_value = bit_cast<double>(fake_object);
|
|
|
|
FieldIndex field_index = FieldIndex::ForDescriptor(obj->map(), 0);
|
|
Handle<HeapNumber> boom_number = factory->NewHeapNumber(boom_value, MUTABLE);
|
|
obj->FastPropertyAtPut(field_index, *boom_number);
|
|
|
|
// Enforce scan on scavenge for the obj's page.
|
|
MemoryChunk* chunk = MemoryChunk::FromAddress(obj->address());
|
|
chunk->set_scan_on_scavenge(true);
|
|
|
|
// Trigger GCs and force evacuation. Should not crash there.
|
|
CcTest::heap()->CollectAllGarbage(i::Heap::kNoGCFlags);
|
|
|
|
CHECK_EQ(boom_value, GetDoubleFieldValue(*obj, field_index));
|
|
}
|
|
|
|
#endif
|