v8/test/cctest/test-transitions.cc

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// Copyright 2014 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 <stdlib.h>
#include <utility>
#include "src/v8.h"
#include "src/compilation-cache.h"
#include "src/execution.h"
#include "src/factory.h"
#include "src/global-handles.h"
#include "test/cctest/cctest.h"
using namespace v8::internal;
//
// Helper functions.
//
static void CheckPropertyDetailsFieldsConsistency(PropertyType type,
PropertyKind kind,
PropertyLocation location) {
int type_value = PropertyDetails::TypeField::encode(type);
int kind_location_value = PropertyDetails::KindField::encode(kind) |
PropertyDetails::LocationField::encode(location);
CHECK_EQ(type_value, kind_location_value);
}
TEST(PropertyDetailsFieldsConsistency) {
CheckPropertyDetailsFieldsConsistency(DATA, kData, kField);
CheckPropertyDetailsFieldsConsistency(DATA_CONSTANT, kData, kDescriptor);
CheckPropertyDetailsFieldsConsistency(ACCESSOR, kAccessor, kField);
CheckPropertyDetailsFieldsConsistency(ACCESSOR_CONSTANT, kAccessor,
kDescriptor);
}
TEST(TransitionArray_SimpleFieldTransitions) {
CcTest::InitializeVM();
v8::HandleScope scope(CcTest::isolate());
Isolate* isolate = CcTest::i_isolate();
Factory* factory = isolate->factory();
Handle<String> name1 = factory->InternalizeUtf8String("foo");
Handle<String> name2 = factory->InternalizeUtf8String("bar");
PropertyAttributes attributes = NONE;
Handle<Map> map0 = Map::Create(isolate, 0);
Handle<Map> map1 =
Map::CopyWithField(map0, name1, handle(FieldType::Any(), isolate),
attributes, Representation::Tagged(), OMIT_TRANSITION)
.ToHandleChecked();
Handle<Map> map2 =
Map::CopyWithField(map0, name2, handle(FieldType::Any(), isolate),
attributes, Representation::Tagged(), OMIT_TRANSITION)
.ToHandleChecked();
CHECK(map0->raw_transitions()->IsSmi());
TransitionArray::Insert(map0, name1, map1, SIMPLE_PROPERTY_TRANSITION);
CHECK(TransitionArray::IsSimpleTransition(map0->raw_transitions()));
CHECK_EQ(*map1,
TransitionArray::SearchTransition(*map0, kData, *name1, attributes));
CHECK_EQ(1, TransitionArray::NumberOfTransitions(map0->raw_transitions()));
CHECK_EQ(*name1, TransitionArray::GetKey(map0->raw_transitions(), 0));
CHECK_EQ(*map1, TransitionArray::GetTarget(map0->raw_transitions(), 0));
TransitionArray::Insert(map0, name2, map2, SIMPLE_PROPERTY_TRANSITION);
CHECK(TransitionArray::IsFullTransitionArray(map0->raw_transitions()));
CHECK_EQ(*map1,
TransitionArray::SearchTransition(*map0, kData, *name1, attributes));
CHECK_EQ(*map2,
TransitionArray::SearchTransition(*map0, kData, *name2, attributes));
CHECK_EQ(2, TransitionArray::NumberOfTransitions(map0->raw_transitions()));
for (int i = 0; i < 2; i++) {
Name* key = TransitionArray::GetKey(map0->raw_transitions(), i);
Map* target = TransitionArray::GetTarget(map0->raw_transitions(), i);
CHECK((key == *name1 && target == *map1) ||
(key == *name2 && target == *map2));
}
#ifdef DEBUG
CHECK(TransitionArray::IsSortedNoDuplicates(*map0));
#endif
}
TEST(TransitionArray_FullFieldTransitions) {
CcTest::InitializeVM();
v8::HandleScope scope(CcTest::isolate());
Isolate* isolate = CcTest::i_isolate();
Factory* factory = isolate->factory();
Handle<String> name1 = factory->InternalizeUtf8String("foo");
Handle<String> name2 = factory->InternalizeUtf8String("bar");
PropertyAttributes attributes = NONE;
Handle<Map> map0 = Map::Create(isolate, 0);
Handle<Map> map1 =
Map::CopyWithField(map0, name1, handle(FieldType::Any(), isolate),
attributes, Representation::Tagged(), OMIT_TRANSITION)
.ToHandleChecked();
Handle<Map> map2 =
Map::CopyWithField(map0, name2, handle(FieldType::Any(), isolate),
attributes, Representation::Tagged(), OMIT_TRANSITION)
.ToHandleChecked();
CHECK(map0->raw_transitions()->IsSmi());
TransitionArray::Insert(map0, name1, map1, PROPERTY_TRANSITION);
CHECK(TransitionArray::IsFullTransitionArray(map0->raw_transitions()));
CHECK_EQ(*map1,
TransitionArray::SearchTransition(*map0, kData, *name1, attributes));
CHECK_EQ(1, TransitionArray::NumberOfTransitions(map0->raw_transitions()));
CHECK_EQ(*name1, TransitionArray::GetKey(map0->raw_transitions(), 0));
CHECK_EQ(*map1, TransitionArray::GetTarget(map0->raw_transitions(), 0));
TransitionArray::Insert(map0, name2, map2, PROPERTY_TRANSITION);
CHECK(TransitionArray::IsFullTransitionArray(map0->raw_transitions()));
CHECK_EQ(*map1,
TransitionArray::SearchTransition(*map0, kData, *name1, attributes));
CHECK_EQ(*map2,
TransitionArray::SearchTransition(*map0, kData, *name2, attributes));
CHECK_EQ(2, TransitionArray::NumberOfTransitions(map0->raw_transitions()));
for (int i = 0; i < 2; i++) {
Name* key = TransitionArray::GetKey(map0->raw_transitions(), i);
Map* target = TransitionArray::GetTarget(map0->raw_transitions(), i);
CHECK((key == *name1 && target == *map1) ||
(key == *name2 && target == *map2));
}
#ifdef DEBUG
CHECK(TransitionArray::IsSortedNoDuplicates(*map0));
#endif
}
TEST(TransitionArray_DifferentFieldNames) {
CcTest::InitializeVM();
v8::HandleScope scope(CcTest::isolate());
Isolate* isolate = CcTest::i_isolate();
Factory* factory = isolate->factory();
const int PROPS_COUNT = 10;
Handle<String> names[PROPS_COUNT];
Handle<Map> maps[PROPS_COUNT];
PropertyAttributes attributes = NONE;
Handle<Map> map0 = Map::Create(isolate, 0);
CHECK(map0->raw_transitions()->IsSmi());
for (int i = 0; i < PROPS_COUNT; i++) {
EmbeddedVector<char, 64> buffer;
SNPrintF(buffer, "prop%d", i);
Handle<String> name = factory->InternalizeUtf8String(buffer.start());
Handle<Map> map = Map::CopyWithField(
map0, name, handle(FieldType::Any(), isolate),
attributes, Representation::Tagged(), OMIT_TRANSITION)
.ToHandleChecked();
names[i] = name;
maps[i] = map;
TransitionArray::Insert(map0, name, map, PROPERTY_TRANSITION);
}
for (int i = 0; i < PROPS_COUNT; i++) {
CHECK_EQ(*maps[i], TransitionArray::SearchTransition(
*map0, kData, *names[i], attributes));
}
for (int i = 0; i < PROPS_COUNT; i++) {
Name* key = TransitionArray::GetKey(map0->raw_transitions(), i);
Map* target = TransitionArray::GetTarget(map0->raw_transitions(), i);
for (int j = 0; j < PROPS_COUNT; j++) {
if (*names[i] == key) {
CHECK_EQ(*maps[i], target);
break;
}
}
}
#ifdef DEBUG
CHECK(TransitionArray::IsSortedNoDuplicates(*map0));
#endif
}
TEST(TransitionArray_SameFieldNamesDifferentAttributesSimple) {
CcTest::InitializeVM();
v8::HandleScope scope(CcTest::isolate());
Isolate* isolate = CcTest::i_isolate();
Factory* factory = isolate->factory();
Handle<Map> map0 = Map::Create(isolate, 0);
CHECK(map0->raw_transitions()->IsSmi());
const int ATTRS_COUNT = (READ_ONLY | DONT_ENUM | DONT_DELETE) + 1;
STATIC_ASSERT(ATTRS_COUNT == 8);
Handle<Map> attr_maps[ATTRS_COUNT];
Handle<String> name = factory->InternalizeUtf8String("foo");
// Add transitions for same field name but different attributes.
for (int i = 0; i < ATTRS_COUNT; i++) {
PropertyAttributes attributes = static_cast<PropertyAttributes>(i);
Handle<Map> map = Map::CopyWithField(
map0, name, handle(FieldType::Any(), isolate),
attributes, Representation::Tagged(), OMIT_TRANSITION)
.ToHandleChecked();
attr_maps[i] = map;
TransitionArray::Insert(map0, name, map, PROPERTY_TRANSITION);
}
// Ensure that transitions for |name| field are valid.
for (int i = 0; i < ATTRS_COUNT; i++) {
PropertyAttributes attributes = static_cast<PropertyAttributes>(i);
CHECK_EQ(*attr_maps[i], TransitionArray::SearchTransition(
*map0, kData, *name, attributes));
// All transitions use the same key, so this check doesn't need to
// care about ordering.
CHECK_EQ(*name, TransitionArray::GetKey(map0->raw_transitions(), i));
}
#ifdef DEBUG
CHECK(TransitionArray::IsSortedNoDuplicates(*map0));
#endif
}
TEST(TransitionArray_SameFieldNamesDifferentAttributes) {
CcTest::InitializeVM();
v8::HandleScope scope(CcTest::isolate());
Isolate* isolate = CcTest::i_isolate();
Factory* factory = isolate->factory();
const int PROPS_COUNT = 10;
Handle<String> names[PROPS_COUNT];
Handle<Map> maps[PROPS_COUNT];
Handle<Map> map0 = Map::Create(isolate, 0);
CHECK(map0->raw_transitions()->IsSmi());
// Some number of fields.
for (int i = 0; i < PROPS_COUNT; i++) {
EmbeddedVector<char, 64> buffer;
SNPrintF(buffer, "prop%d", i);
Handle<String> name = factory->InternalizeUtf8String(buffer.start());
Handle<Map> map =
Map::CopyWithField(map0, name, handle(FieldType::Any(), isolate), NONE,
Representation::Tagged(), OMIT_TRANSITION)
.ToHandleChecked();
names[i] = name;
maps[i] = map;
TransitionArray::Insert(map0, name, map, PROPERTY_TRANSITION);
}
const int ATTRS_COUNT = (READ_ONLY | DONT_ENUM | DONT_DELETE) + 1;
STATIC_ASSERT(ATTRS_COUNT == 8);
Handle<Map> attr_maps[ATTRS_COUNT];
Handle<String> name = factory->InternalizeUtf8String("foo");
// Add transitions for same field name but different attributes.
for (int i = 0; i < ATTRS_COUNT; i++) {
PropertyAttributes attributes = static_cast<PropertyAttributes>(i);
Handle<Map> map = Map::CopyWithField(
map0, name, handle(FieldType::Any(), isolate),
attributes, Representation::Tagged(), OMIT_TRANSITION)
.ToHandleChecked();
attr_maps[i] = map;
TransitionArray::Insert(map0, name, map, PROPERTY_TRANSITION);
}
// Ensure that transitions for |name| field are valid.
for (int i = 0; i < ATTRS_COUNT; i++) {
PropertyAttributes attr = static_cast<PropertyAttributes>(i);
CHECK_EQ(*attr_maps[i],
TransitionArray::SearchTransition(*map0, kData, *name, attr));
}
// Ensure that info about the other fields still valid.
CHECK_EQ(PROPS_COUNT + ATTRS_COUNT,
TransitionArray::NumberOfTransitions(map0->raw_transitions()));
for (int i = 0; i < PROPS_COUNT + ATTRS_COUNT; i++) {
Name* key = TransitionArray::GetKey(map0->raw_transitions(), i);
Map* target = TransitionArray::GetTarget(map0->raw_transitions(), i);
if (key == *name) {
// Attributes transition.
PropertyAttributes attributes =
target->GetLastDescriptorDetails().attributes();
CHECK_EQ(*attr_maps[static_cast<int>(attributes)], target);
} else {
for (int j = 0; j < PROPS_COUNT; j++) {
if (*names[j] == key) {
CHECK_EQ(*maps[j], target);
break;
}
}
}
}
#ifdef DEBUG
CHECK(TransitionArray::IsSortedNoDuplicates(*map0));
#endif
}