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// Copyright 2020 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 <cmath>
#include <iostream>
#include <limits>
#include <memory>
#include "src/ast/ast-value-factory.h"
#include "src/handles/handles-inl.h"
#include "src/handles/handles.h"
#include "src/heap/off-thread-factory.h"
#include "src/objects/fixed-array.h"
#include "src/objects/string.h"
#include "test/unittests/test-utils.h"
namespace v8 {
namespace internal {
class OffThreadFactoryTest : public TestWithIsolateAndZone {
public:
OffThreadFactoryTest()
: TestWithIsolateAndZone(), off_thread_factory_(isolate()) {}
OffThreadFactory* off_thread_factory() { return &off_thread_factory_; }
// We only internalize strings which are referred to in other slots, so create
// a wrapper pointing at the off_thread_string.
OffThreadHandle<FixedArray> WrapString(OffThreadHandle<String> string) {
// TODO(leszeks): Replace with a different factory method (e.g. FixedArray)
// once OffThreadFactory supports it.
return off_thread_factory()->StringWrapperForTest(string);
}
private:
OffThreadFactory off_thread_factory_;
};
TEST_F(OffThreadFactoryTest, HandleOrOffThreadHandle_IsNullWhenConstructed) {
// Default constructed HandleOrOffThreadHandles should be considered both null
// and uninitialized.
EXPECT_TRUE(HandleOrOffThreadHandle<HeapObject>().is_null());
#ifdef DEBUG
EXPECT_TRUE(!HandleOrOffThreadHandle<HeapObject>().is_initialized());
#endif
// Default constructed HandleOrOffThreadHandles should work as both null
// handles and null off-thread handles.
EXPECT_TRUE(HandleOrOffThreadHandle<HeapObject>().get<Factory>().is_null());
EXPECT_TRUE(
HandleOrOffThreadHandle<HeapObject>().get<OffThreadFactory>().is_null());
}
TEST_F(OffThreadFactoryTest, OneByteInternalizedString_IsAddedToStringTable) {
Vector<const uint8_t> string_vector = StaticCharVector("foo");
uint32_t hash_field = StringHasher::HashSequentialString<uint8_t>(
string_vector.begin(), string_vector.length(), HashSeed(isolate()));
OffThreadHandle<String> off_thread_string =
off_thread_factory()->NewOneByteInternalizedString(string_vector,
hash_field);
OffThreadHandle<FixedArray> off_thread_wrapper =
off_thread_factory()->StringWrapperForTest(off_thread_string);
off_thread_factory()->FinishOffThread();
Handle<FixedArray> wrapper = handle(*off_thread_wrapper, isolate());
off_thread_factory()->Publish(isolate());
Handle<String> string = handle(String::cast(wrapper->get(0)), isolate());
EXPECT_TRUE(string->IsOneByteEqualTo(CStrVector("foo")));
EXPECT_TRUE(string->IsInternalizedString());
Handle<String> same_string = isolate()
->factory()
->NewStringFromOneByte(string_vector)
.ToHandleChecked();
EXPECT_NE(*string, *same_string);
EXPECT_FALSE(same_string->IsInternalizedString());
Handle<String> internalized_string =
isolate()->factory()->InternalizeString(same_string);
EXPECT_EQ(*string, *internalized_string);
}
TEST_F(OffThreadFactoryTest,
OneByteInternalizedString_DuplicateIsDeduplicated) {
Vector<const uint8_t> string_vector = StaticCharVector("foo");
uint32_t hash_field = StringHasher::HashSequentialString<uint8_t>(
string_vector.begin(), string_vector.length(), HashSeed(isolate()));
OffThreadHandle<String> off_thread_string_1 =
off_thread_factory()->NewOneByteInternalizedString(string_vector,
hash_field);
OffThreadHandle<String> off_thread_string_2 =
off_thread_factory()->NewOneByteInternalizedString(string_vector,
hash_field);
OffThreadHandle<FixedArray> off_thread_wrapper_1 =
WrapString(off_thread_string_1);
OffThreadHandle<FixedArray> off_thread_wrapper_2 =
WrapString(off_thread_string_2);
off_thread_factory()->FinishOffThread();
Handle<FixedArray> wrapper_1 = handle(*off_thread_wrapper_1, isolate());
Handle<FixedArray> wrapper_2 = handle(*off_thread_wrapper_2, isolate());
off_thread_factory()->Publish(isolate());
Handle<String> string_1 = handle(String::cast(wrapper_1->get(0)), isolate());
Handle<String> string_2 = handle(String::cast(wrapper_2->get(0)), isolate());
EXPECT_TRUE(string_1->IsOneByteEqualTo(CStrVector("foo")));
EXPECT_TRUE(string_1->IsInternalizedString());
EXPECT_EQ(*string_1, *string_2);
}
TEST_F(OffThreadFactoryTest, AstRawString_IsInternalized) {
AstValueFactory ast_value_factory(zone(), isolate()->ast_string_constants(),
HashSeed(isolate()));
const AstRawString* raw_string = ast_value_factory.GetOneByteString("foo");
ast_value_factory.Internalize(off_thread_factory());
OffThreadHandle<FixedArray> off_thread_wrapper =
WrapString(raw_string->string().get<OffThreadFactory>());
off_thread_factory()->FinishOffThread();
Handle<FixedArray> wrapper = handle(*off_thread_wrapper, isolate());
off_thread_factory()->Publish(isolate());
Handle<String> string = handle(String::cast(wrapper->get(0)), isolate());
EXPECT_TRUE(string->IsOneByteEqualTo(CStrVector("foo")));
EXPECT_TRUE(string->IsInternalizedString());
}
TEST_F(OffThreadFactoryTest, AstConsString_CreatesConsString) {
AstValueFactory ast_value_factory(zone(), isolate()->ast_string_constants(),
HashSeed(isolate()));
const AstRawString* foo_string = ast_value_factory.GetOneByteString("foo");
const AstRawString* bar_string =
ast_value_factory.GetOneByteString("bar-plus-padding-for-length");
const AstConsString* foobar_string =
ast_value_factory.NewConsString(foo_string, bar_string);
ast_value_factory.Internalize(off_thread_factory());
OffThreadHandle<FixedArray> off_thread_wrapper =
WrapString(foobar_string->string().get<OffThreadFactory>());
off_thread_factory()->FinishOffThread();
Handle<FixedArray> wrapper = handle(*off_thread_wrapper, isolate());
off_thread_factory()->Publish(isolate());
Handle<String> string = handle(String::cast(wrapper->get(0)), isolate());
EXPECT_TRUE(string->IsConsString());
EXPECT_TRUE(string->Equals(*isolate()->factory()->NewStringFromStaticChars(
"foobar-plus-padding-for-length")));
}
} // namespace internal
} // namespace v8
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