00a341994f
Avoid the deprecated FLAG_* syntax, access flag values via the
{v8_flags} struct instead.
R=mliedtke@chromium.org
Bug: v8:12887
Change-Id: I417eee6311fadef9b60043cfc9a42926859c7ab9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3899304
Reviewed-by: Matthias Liedtke <mliedtke@chromium.org>
Commit-Queue: Matthias Liedtke <mliedtke@chromium.org>
Cr-Commit-Position: refs/heads/main@{#83247}
1474 lines
45 KiB
C++
1474 lines
45 KiB
C++
// 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 <stdlib.h>
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#include <sstream>
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#include <utility>
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#include "src/api/api-inl.h"
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#include "src/objects/heap-number-inl.h"
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#include "src/objects/objects-inl.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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namespace test_inobject_slack_tracking {
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static const int kMaxInobjectProperties = JSObject::kMaxInObjectProperties;
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template <typename T>
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static Handle<T> OpenHandle(v8::Local<v8::Value> value) {
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Handle<Object> obj = v8::Utils::OpenHandle(*value);
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return Handle<T>::cast(obj);
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}
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static inline v8::Local<v8::Value> Run(v8::Local<v8::Script> script) {
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v8::Local<v8::Value> result;
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if (script->Run(CcTest::isolate()->GetCurrentContext()).ToLocal(&result)) {
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return result;
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}
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return v8::Local<v8::Value>();
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}
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template <typename T = Object>
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Handle<T> GetLexical(const char* name) {
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Isolate* isolate = CcTest::i_isolate();
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Factory* factory = isolate->factory();
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Handle<String> str_name = factory->InternalizeUtf8String(name);
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Handle<ScriptContextTable> script_contexts(
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isolate->native_context()->script_context_table(), isolate);
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VariableLookupResult lookup_result;
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if (script_contexts->Lookup(str_name, &lookup_result)) {
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Handle<Context> script_context = ScriptContextTable::GetContext(
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isolate, script_contexts, lookup_result.context_index);
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Handle<Object> result(script_context->get(lookup_result.slot_index),
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isolate);
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return Handle<T>::cast(result);
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}
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return Handle<T>();
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}
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template <typename T = Object>
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Handle<T> GetLexical(const std::string& name) {
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return GetLexical<T>(name.c_str());
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}
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template <typename T>
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static inline Handle<T> RunI(v8::Local<v8::Script> script) {
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return OpenHandle<T>(Run(script));
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}
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template <typename T>
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static inline Handle<T> CompileRunI(const char* script) {
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return OpenHandle<T>(CompileRun(script));
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}
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static Object GetFieldValue(JSObject obj, int property_index) {
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FieldIndex index = FieldIndex::ForPropertyIndex(obj.map(), property_index);
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return obj.RawFastPropertyAt(index);
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}
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static double GetDoubleFieldValue(JSObject obj, FieldIndex field_index) {
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Object value = obj.RawFastPropertyAt(field_index);
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if (value.IsHeapNumber()) {
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return HeapNumber::cast(value).value();
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} else {
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return value.Number();
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}
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}
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static double GetDoubleFieldValue(JSObject obj, int property_index) {
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FieldIndex index = FieldIndex::ForPropertyIndex(obj.map(), property_index);
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return GetDoubleFieldValue(obj, index);
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}
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bool IsObjectShrinkable(JSObject obj) {
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Handle<Map> filler_map =
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CcTest::i_isolate()->factory()->one_pointer_filler_map();
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int inobject_properties = obj.map().GetInObjectProperties();
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int unused = obj.map().UnusedPropertyFields();
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if (unused == 0) return false;
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Address packed_filler = MapWord::FromMap(*filler_map).ptr();
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for (int i = inobject_properties - unused; i < inobject_properties; i++) {
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if (packed_filler != GetFieldValue(obj, i).ptr()) {
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return false;
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}
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}
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return true;
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}
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TEST(JSObjectBasic) {
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// Avoid eventual completion of in-object slack tracking.
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v8_flags.always_turbofan = false;
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CcTest::InitializeVM();
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v8::HandleScope scope(CcTest::isolate());
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const char* source =
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"function A() {"
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" this.a = 42;"
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" this.d = 4.2;"
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" this.o = this;"
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"}";
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CompileRun(source);
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Handle<JSFunction> func = GetGlobal<JSFunction>("A");
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// Zero instances were created so far.
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CHECK(!func->has_initial_map());
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v8::Local<v8::Script> new_A_script = v8_compile("new A();");
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Handle<JSObject> obj = RunI<JSObject>(new_A_script);
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CHECK(func->has_initial_map());
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Handle<Map> initial_map(func->initial_map(), func->GetIsolate());
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// One instance created.
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CHECK_EQ(Map::kSlackTrackingCounterStart - 1,
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initial_map->construction_counter());
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CHECK(initial_map->IsInobjectSlackTrackingInProgress());
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// There must be at least some slack.
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CHECK_LT(5, obj->map().GetInObjectProperties());
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CHECK_EQ(Smi::FromInt(42), GetFieldValue(*obj, 0));
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CHECK_EQ(4.2, GetDoubleFieldValue(*obj, 1));
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CHECK_EQ(*obj, GetFieldValue(*obj, 2));
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CHECK(IsObjectShrinkable(*obj));
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// Create several objects to complete the tracking.
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for (int i = 1; i < Map::kGenerousAllocationCount; i++) {
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CHECK(initial_map->IsInobjectSlackTrackingInProgress());
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Handle<JSObject> tmp = RunI<JSObject>(new_A_script);
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CHECK_EQ(initial_map->IsInobjectSlackTrackingInProgress(),
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IsObjectShrinkable(*tmp));
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}
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CHECK(!initial_map->IsInobjectSlackTrackingInProgress());
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CHECK(!IsObjectShrinkable(*obj));
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// No slack left.
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CHECK_EQ(3, obj->map().GetInObjectProperties());
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}
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TEST(JSObjectBasicNoInlineNew) {
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v8_flags.inline_new = false;
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TestJSObjectBasic();
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}
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TEST(JSObjectComplex) {
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// Avoid eventual completion of in-object slack tracking.
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v8_flags.always_turbofan = false;
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CcTest::InitializeVM();
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v8::HandleScope scope(CcTest::isolate());
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const char* source =
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"function A(n) {"
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" if (n > 0) this.a = 42;"
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" if (n > 1) this.d = 4.2;"
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" if (n > 2) this.o1 = this;"
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" if (n > 3) this.o2 = this;"
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" if (n > 4) this.o3 = this;"
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" if (n > 5) this.o4 = this;"
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"}";
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CompileRun(source);
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Handle<JSFunction> func = GetGlobal<JSFunction>("A");
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// Zero instances were created so far.
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CHECK(!func->has_initial_map());
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Handle<JSObject> obj1 = CompileRunI<JSObject>("new A(1);");
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Handle<JSObject> obj3 = CompileRunI<JSObject>("new A(3);");
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Handle<JSObject> obj5 = CompileRunI<JSObject>("new A(5);");
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CHECK(func->has_initial_map());
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Handle<Map> initial_map(func->initial_map(), func->GetIsolate());
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// Three instances created.
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CHECK_EQ(Map::kSlackTrackingCounterStart - 3,
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initial_map->construction_counter());
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CHECK(initial_map->IsInobjectSlackTrackingInProgress());
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// There must be at least some slack.
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CHECK_LT(5, obj3->map().GetInObjectProperties());
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CHECK_EQ(Smi::FromInt(42), GetFieldValue(*obj3, 0));
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CHECK_EQ(4.2, GetDoubleFieldValue(*obj3, 1));
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CHECK_EQ(*obj3, GetFieldValue(*obj3, 2));
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CHECK(IsObjectShrinkable(*obj1));
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CHECK(IsObjectShrinkable(*obj3));
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CHECK(IsObjectShrinkable(*obj5));
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// Create several objects to complete the tracking.
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for (int i = 3; i < Map::kGenerousAllocationCount; i++) {
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CHECK(initial_map->IsInobjectSlackTrackingInProgress());
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CompileRun("new A(3);");
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}
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CHECK(!initial_map->IsInobjectSlackTrackingInProgress());
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// obj1 and obj2 stays shrinkable because we don't clear unused fields.
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CHECK(IsObjectShrinkable(*obj1));
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CHECK(IsObjectShrinkable(*obj3));
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CHECK(!IsObjectShrinkable(*obj5));
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CHECK_EQ(5, obj1->map().GetInObjectProperties());
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CHECK_EQ(4, obj1->map().UnusedPropertyFields());
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CHECK_EQ(5, obj3->map().GetInObjectProperties());
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CHECK_EQ(2, obj3->map().UnusedPropertyFields());
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CHECK_EQ(5, obj5->map().GetInObjectProperties());
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CHECK_EQ(0, obj5->map().UnusedPropertyFields());
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// Since slack tracking is complete, the new objects should not be shrinkable.
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obj1 = CompileRunI<JSObject>("new A(1);");
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obj3 = CompileRunI<JSObject>("new A(3);");
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obj5 = CompileRunI<JSObject>("new A(5);");
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CHECK(!IsObjectShrinkable(*obj1));
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CHECK(!IsObjectShrinkable(*obj3));
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CHECK(!IsObjectShrinkable(*obj5));
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}
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TEST(JSObjectComplexNoInlineNew) {
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v8_flags.inline_new = false;
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TestJSObjectComplex();
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}
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TEST(JSGeneratorObjectBasic) {
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// Avoid eventual completion of in-object slack tracking.
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v8_flags.always_turbofan = false;
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CcTest::InitializeVM();
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v8::HandleScope scope(CcTest::isolate());
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const char* source =
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"function* A() {"
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" var i = 0;"
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" while(true) {"
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" yield i++;"
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" }"
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"};"
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"function CreateGenerator() {"
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" var o = A();"
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" o.a = 42;"
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" o.d = 4.2;"
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" o.o = o;"
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" return o;"
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"}";
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CompileRun(source);
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Handle<JSFunction> func = GetGlobal<JSFunction>("A");
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// Zero instances were created so far.
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CHECK(!func->has_initial_map());
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v8::Local<v8::Script> new_A_script = v8_compile("CreateGenerator();");
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Handle<JSObject> obj = RunI<JSObject>(new_A_script);
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CHECK(func->has_initial_map());
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Handle<Map> initial_map(func->initial_map(), func->GetIsolate());
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// One instance created.
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CHECK_EQ(Map::kSlackTrackingCounterStart - 1,
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initial_map->construction_counter());
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CHECK(initial_map->IsInobjectSlackTrackingInProgress());
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// There must be at least some slack.
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CHECK_LT(5, obj->map().GetInObjectProperties());
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CHECK_EQ(Smi::FromInt(42), GetFieldValue(*obj, 0));
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CHECK_EQ(4.2, GetDoubleFieldValue(*obj, 1));
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CHECK_EQ(*obj, GetFieldValue(*obj, 2));
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CHECK(IsObjectShrinkable(*obj));
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// Create several objects to complete the tracking.
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for (int i = 1; i < Map::kGenerousAllocationCount; i++) {
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CHECK(initial_map->IsInobjectSlackTrackingInProgress());
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Handle<JSObject> tmp = RunI<JSObject>(new_A_script);
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CHECK_EQ(initial_map->IsInobjectSlackTrackingInProgress(),
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IsObjectShrinkable(*tmp));
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}
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CHECK(!initial_map->IsInobjectSlackTrackingInProgress());
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CHECK(!IsObjectShrinkable(*obj));
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// No slack left.
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CHECK_EQ(3, obj->map().GetInObjectProperties());
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}
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TEST(JSGeneratorObjectBasicNoInlineNew) {
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v8_flags.inline_new = false;
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TestJSGeneratorObjectBasic();
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}
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TEST(SubclassBasicNoBaseClassInstances) {
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// Avoid eventual completion of in-object slack tracking.
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v8_flags.always_turbofan = false;
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CcTest::InitializeVM();
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v8::HandleScope scope(CcTest::isolate());
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// Check that base class' and subclass' slack tracking do not interfere with
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// each other.
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// In this test we never create base class instances.
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const char* source =
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"'use strict';"
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"class A {"
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" constructor(...args) {"
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" this.aa = 42;"
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" this.ad = 4.2;"
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" this.ao = this;"
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" }"
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"};"
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"class B extends A {"
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" constructor(...args) {"
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" super(...args);"
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" this.ba = 142;"
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" this.bd = 14.2;"
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" this.bo = this;"
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" }"
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"};";
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CompileRun(source);
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Handle<JSFunction> a_func = GetLexical<JSFunction>("A");
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Handle<JSFunction> b_func = GetLexical<JSFunction>("B");
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// Zero instances were created so far.
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CHECK(!a_func->has_initial_map());
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CHECK(!b_func->has_initial_map());
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v8::Local<v8::Script> new_B_script = v8_compile("new B();");
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Handle<JSObject> obj = RunI<JSObject>(new_B_script);
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CHECK(a_func->has_initial_map());
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Handle<Map> a_initial_map(a_func->initial_map(), a_func->GetIsolate());
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CHECK(b_func->has_initial_map());
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Handle<Map> b_initial_map(b_func->initial_map(), a_func->GetIsolate());
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// Zero instances of A created.
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CHECK_EQ(Map::kSlackTrackingCounterStart,
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a_initial_map->construction_counter());
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CHECK(a_initial_map->IsInobjectSlackTrackingInProgress());
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// One instance of B created.
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CHECK_EQ(Map::kSlackTrackingCounterStart - 1,
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b_initial_map->construction_counter());
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CHECK(b_initial_map->IsInobjectSlackTrackingInProgress());
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// There must be at least some slack.
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CHECK_LT(10, obj->map().GetInObjectProperties());
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CHECK_EQ(Smi::FromInt(42), GetFieldValue(*obj, 0));
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CHECK_EQ(4.2, GetDoubleFieldValue(*obj, 1));
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CHECK_EQ(*obj, GetFieldValue(*obj, 2));
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CHECK_EQ(Smi::FromInt(142), GetFieldValue(*obj, 3));
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CHECK_EQ(14.2, GetDoubleFieldValue(*obj, 4));
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CHECK_EQ(*obj, GetFieldValue(*obj, 5));
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CHECK(IsObjectShrinkable(*obj));
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// Create several subclass instances to complete the tracking.
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for (int i = 1; i < Map::kGenerousAllocationCount; i++) {
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CHECK(b_initial_map->IsInobjectSlackTrackingInProgress());
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Handle<JSObject> tmp = RunI<JSObject>(new_B_script);
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CHECK_EQ(b_initial_map->IsInobjectSlackTrackingInProgress(),
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IsObjectShrinkable(*tmp));
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}
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CHECK(!b_initial_map->IsInobjectSlackTrackingInProgress());
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CHECK(!IsObjectShrinkable(*obj));
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// Zero instances of A created.
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CHECK_EQ(Map::kSlackTrackingCounterStart,
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a_initial_map->construction_counter());
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CHECK(a_initial_map->IsInobjectSlackTrackingInProgress());
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// No slack left.
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CHECK_EQ(6, obj->map().GetInObjectProperties());
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}
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TEST(SubclassBasicNoBaseClassInstancesNoInlineNew) {
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v8_flags.inline_new = false;
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TestSubclassBasicNoBaseClassInstances();
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}
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TEST(SubclassBasic) {
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// Avoid eventual completion of in-object slack tracking.
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v8_flags.always_turbofan = false;
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CcTest::InitializeVM();
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v8::HandleScope scope(CcTest::isolate());
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// Check that base class' and subclass' slack tracking do not interfere with
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// each other.
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// In this test we first create enough base class instances to complete
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// the slack tracking and then proceed creating subclass instances.
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const char* source =
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"'use strict';"
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"class A {"
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" constructor(...args) {"
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" this.aa = 42;"
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" this.ad = 4.2;"
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" this.ao = this;"
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" }"
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"};"
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"class B extends A {"
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" constructor(...args) {"
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" super(...args);"
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" this.ba = 142;"
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" this.bd = 14.2;"
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" this.bo = this;"
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" }"
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"};";
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CompileRun(source);
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Handle<JSFunction> a_func = GetLexical<JSFunction>("A");
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Handle<JSFunction> b_func = GetLexical<JSFunction>("B");
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// Zero instances were created so far.
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CHECK(!a_func->has_initial_map());
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CHECK(!b_func->has_initial_map());
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v8::Local<v8::Script> new_A_script = v8_compile("new A();");
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v8::Local<v8::Script> new_B_script = v8_compile("new B();");
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Handle<JSObject> a_obj = RunI<JSObject>(new_A_script);
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Handle<JSObject> b_obj = RunI<JSObject>(new_B_script);
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CHECK(a_func->has_initial_map());
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Handle<Map> a_initial_map(a_func->initial_map(), a_func->GetIsolate());
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CHECK(b_func->has_initial_map());
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Handle<Map> b_initial_map(b_func->initial_map(), a_func->GetIsolate());
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// One instance of a base class created.
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CHECK_EQ(Map::kSlackTrackingCounterStart - 1,
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a_initial_map->construction_counter());
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CHECK(a_initial_map->IsInobjectSlackTrackingInProgress());
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// One instance of a subclass created.
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CHECK_EQ(Map::kSlackTrackingCounterStart - 1,
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b_initial_map->construction_counter());
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CHECK(b_initial_map->IsInobjectSlackTrackingInProgress());
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// Create several base class instances to complete the tracking.
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for (int i = 1; i < Map::kGenerousAllocationCount; i++) {
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CHECK(a_initial_map->IsInobjectSlackTrackingInProgress());
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Handle<JSObject> tmp = RunI<JSObject>(new_A_script);
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CHECK_EQ(a_initial_map->IsInobjectSlackTrackingInProgress(),
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IsObjectShrinkable(*tmp));
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}
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CHECK(!a_initial_map->IsInobjectSlackTrackingInProgress());
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CHECK(!IsObjectShrinkable(*a_obj));
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// No slack left.
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CHECK_EQ(3, a_obj->map().GetInObjectProperties());
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// There must be at least some slack.
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CHECK_LT(10, b_obj->map().GetInObjectProperties());
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CHECK_EQ(Smi::FromInt(42), GetFieldValue(*b_obj, 0));
|
|
CHECK_EQ(4.2, GetDoubleFieldValue(*b_obj, 1));
|
|
CHECK_EQ(*b_obj, GetFieldValue(*b_obj, 2));
|
|
CHECK_EQ(Smi::FromInt(142), GetFieldValue(*b_obj, 3));
|
|
CHECK_EQ(14.2, GetDoubleFieldValue(*b_obj, 4));
|
|
CHECK_EQ(*b_obj, GetFieldValue(*b_obj, 5));
|
|
CHECK(IsObjectShrinkable(*b_obj));
|
|
|
|
// Create several subclass instances to complete the tracking.
|
|
for (int i = 1; i < Map::kGenerousAllocationCount; i++) {
|
|
CHECK(b_initial_map->IsInobjectSlackTrackingInProgress());
|
|
Handle<JSObject> tmp = RunI<JSObject>(new_B_script);
|
|
CHECK_EQ(b_initial_map->IsInobjectSlackTrackingInProgress(),
|
|
IsObjectShrinkable(*tmp));
|
|
}
|
|
CHECK(!b_initial_map->IsInobjectSlackTrackingInProgress());
|
|
CHECK(!IsObjectShrinkable(*b_obj));
|
|
|
|
// No slack left.
|
|
CHECK_EQ(6, b_obj->map().GetInObjectProperties());
|
|
}
|
|
|
|
|
|
TEST(SubclassBasicNoInlineNew) {
|
|
v8_flags.inline_new = false;
|
|
TestSubclassBasic();
|
|
}
|
|
|
|
|
|
// Creates class hierarchy of length matching the |hierarchy_desc| length and
|
|
// with the number of fields at i'th level equal to |hierarchy_desc[i]|.
|
|
static void CreateClassHierarchy(const std::vector<int>& hierarchy_desc) {
|
|
std::ostringstream os;
|
|
os << "'use strict';\n\n";
|
|
|
|
int n = static_cast<int>(hierarchy_desc.size());
|
|
for (int cur_class = 0; cur_class < n; cur_class++) {
|
|
os << "class A" << cur_class;
|
|
if (cur_class > 0) {
|
|
os << " extends A" << (cur_class - 1);
|
|
}
|
|
os << " {\n"
|
|
" constructor(...args) {\n";
|
|
if (cur_class > 0) {
|
|
os << " super(...args);\n";
|
|
}
|
|
int fields_count = hierarchy_desc[cur_class];
|
|
for (int k = 0; k < fields_count; k++) {
|
|
os << " this.f" << cur_class << "_" << k << " = " << k << ";\n";
|
|
}
|
|
os << " }\n"
|
|
"};\n\n";
|
|
}
|
|
CompileRun(os.str().c_str());
|
|
}
|
|
|
|
|
|
static std::string GetClassName(int class_index) {
|
|
std::ostringstream os;
|
|
os << "A" << class_index;
|
|
return os.str();
|
|
}
|
|
|
|
|
|
static v8::Local<v8::Script> GetNewObjectScript(const std::string& class_name) {
|
|
std::ostringstream os;
|
|
os << "new " << class_name << "();";
|
|
return v8_compile(os.str().c_str());
|
|
}
|
|
|
|
|
|
// Test that in-object slack tracking works as expected for first |n| classes
|
|
// in the hierarchy.
|
|
// This test works only for if the total property count is less than maximum
|
|
// in-object properties count.
|
|
static void TestClassHierarchy(const std::vector<int>& hierarchy_desc, int n) {
|
|
int fields_count = 0;
|
|
for (int cur_class = 0; cur_class < n; cur_class++) {
|
|
std::string class_name = GetClassName(cur_class);
|
|
int fields_count_at_current_level = hierarchy_desc[cur_class];
|
|
fields_count += fields_count_at_current_level;
|
|
|
|
// This test is not suitable for in-object properties count overflow case.
|
|
CHECK_LT(fields_count, kMaxInobjectProperties);
|
|
|
|
// Create |class_name| objects and check slack tracking.
|
|
v8::Local<v8::Script> new_script = GetNewObjectScript(class_name);
|
|
|
|
Handle<JSFunction> func = GetLexical<JSFunction>(class_name);
|
|
|
|
Handle<JSObject> obj = RunI<JSObject>(new_script);
|
|
|
|
CHECK(func->has_initial_map());
|
|
Handle<Map> initial_map(func->initial_map(), func->GetIsolate());
|
|
|
|
// If the object is slow-mode already, bail out.
|
|
if (obj->map().is_dictionary_map()) continue;
|
|
|
|
// There must be at least some slack.
|
|
CHECK_LT(fields_count, obj->map().GetInObjectProperties());
|
|
|
|
// One instance was created.
|
|
CHECK_EQ(Map::kSlackTrackingCounterStart - 1,
|
|
initial_map->construction_counter());
|
|
CHECK(initial_map->IsInobjectSlackTrackingInProgress());
|
|
|
|
// Create several instances to complete the tracking.
|
|
for (int i = 1; i < Map::kGenerousAllocationCount; i++) {
|
|
CHECK(initial_map->IsInobjectSlackTrackingInProgress());
|
|
Handle<JSObject> tmp = RunI<JSObject>(new_script);
|
|
CHECK_EQ(initial_map->IsInobjectSlackTrackingInProgress(),
|
|
IsObjectShrinkable(*tmp));
|
|
if (!initial_map->IsInobjectSlackTrackingInProgress()) {
|
|
// Turbofan can force completion of in-object slack tracking.
|
|
break;
|
|
}
|
|
CHECK_EQ(Map::kSlackTrackingCounterStart - i - 1,
|
|
initial_map->construction_counter());
|
|
}
|
|
CHECK(!initial_map->IsInobjectSlackTrackingInProgress());
|
|
CHECK(!IsObjectShrinkable(*obj));
|
|
|
|
// No slack left.
|
|
CHECK_EQ(fields_count, obj->map().GetInObjectProperties());
|
|
}
|
|
}
|
|
|
|
|
|
static void TestSubclassChain(const std::vector<int>& hierarchy_desc) {
|
|
// Avoid eventual completion of in-object slack tracking.
|
|
v8_flags.always_turbofan = false;
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
CreateClassHierarchy(hierarchy_desc);
|
|
TestClassHierarchy(hierarchy_desc, static_cast<int>(hierarchy_desc.size()));
|
|
}
|
|
|
|
TEST(Subclasses) {
|
|
std::vector<int> hierarchy_desc;
|
|
hierarchy_desc.push_back(50);
|
|
hierarchy_desc.push_back(128);
|
|
TestSubclassChain(hierarchy_desc);
|
|
}
|
|
|
|
TEST(LongSubclassChain1) {
|
|
std::vector<int> hierarchy_desc;
|
|
for (int i = 0; i < 7; i++) {
|
|
hierarchy_desc.push_back(i * 10);
|
|
}
|
|
TestSubclassChain(hierarchy_desc);
|
|
}
|
|
|
|
|
|
TEST(LongSubclassChain2) {
|
|
std::vector<int> hierarchy_desc;
|
|
hierarchy_desc.push_back(10);
|
|
for (int i = 0; i < 42; i++) {
|
|
hierarchy_desc.push_back(0);
|
|
}
|
|
hierarchy_desc.push_back(230);
|
|
TestSubclassChain(hierarchy_desc);
|
|
}
|
|
|
|
|
|
TEST(LongSubclassChain3) {
|
|
std::vector<int> hierarchy_desc;
|
|
for (int i = 0; i < 42; i++) {
|
|
hierarchy_desc.push_back(5);
|
|
}
|
|
TestSubclassChain(hierarchy_desc);
|
|
}
|
|
|
|
|
|
TEST(InobjectPropetiesCountOverflowInSubclass) {
|
|
// Avoid eventual completion of in-object slack tracking.
|
|
v8_flags.always_turbofan = false;
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
std::vector<int> hierarchy_desc;
|
|
const int kNoOverflowCount = 5;
|
|
for (int i = 0; i < kNoOverflowCount; i++) {
|
|
hierarchy_desc.push_back(50);
|
|
}
|
|
// In this class we are going to have properties in the backing store.
|
|
hierarchy_desc.push_back(100);
|
|
|
|
CreateClassHierarchy(hierarchy_desc);
|
|
|
|
// For the last class in the hierarchy we need different checks.
|
|
{
|
|
int cur_class = kNoOverflowCount;
|
|
std::string class_name = GetClassName(cur_class);
|
|
|
|
// Create |class_name| objects and check slack tracking.
|
|
v8::Local<v8::Script> new_script = GetNewObjectScript(class_name);
|
|
|
|
Handle<JSFunction> func = GetLexical<JSFunction>(class_name);
|
|
|
|
Handle<JSObject> obj = RunI<JSObject>(new_script);
|
|
|
|
CHECK(func->has_initial_map());
|
|
Handle<Map> initial_map(func->initial_map(), func->GetIsolate());
|
|
|
|
// There must be no slack left.
|
|
CHECK_EQ(JSObject::kMaxInstanceSize, obj->map().instance_size());
|
|
CHECK_EQ(kMaxInobjectProperties, obj->map().GetInObjectProperties());
|
|
|
|
// One instance was created.
|
|
CHECK_EQ(Map::kSlackTrackingCounterStart - 1,
|
|
initial_map->construction_counter());
|
|
CHECK(initial_map->IsInobjectSlackTrackingInProgress());
|
|
|
|
// Create several instances to complete the tracking.
|
|
for (int i = 1; i < Map::kGenerousAllocationCount; i++) {
|
|
CHECK(initial_map->IsInobjectSlackTrackingInProgress());
|
|
Handle<JSObject> tmp = RunI<JSObject>(new_script);
|
|
CHECK(!IsObjectShrinkable(*tmp));
|
|
}
|
|
CHECK(!initial_map->IsInobjectSlackTrackingInProgress());
|
|
CHECK(!IsObjectShrinkable(*obj));
|
|
|
|
// No slack left.
|
|
CHECK_EQ(kMaxInobjectProperties, obj->map().GetInObjectProperties());
|
|
}
|
|
|
|
// The other classes in the hierarchy are not affected.
|
|
TestClassHierarchy(hierarchy_desc, kNoOverflowCount);
|
|
}
|
|
|
|
static void CheckExpectedProperties(int expected, std::ostringstream& os) {
|
|
Handle<HeapObject> obj = Handle<HeapObject>::cast(
|
|
v8::Utils::OpenHandle(*CompileRun(os.str().c_str())));
|
|
CHECK_EQ(expected, obj->map().GetInObjectProperties());
|
|
}
|
|
|
|
TEST(ObjectLiteralPropertyBackingStoreSize) {
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
LocalContext env;
|
|
|
|
std::ostringstream os;
|
|
|
|
// An index key does not require space in the property backing store.
|
|
os << "(function() {\n"
|
|
" function f() {\n"
|
|
" var o = {\n"
|
|
" '-1': 42,\n" // Allocate for non-index key.
|
|
" 1: 42,\n" // Do not allocate for index key.
|
|
" '2': 42\n" // Do not allocate for index key.
|
|
" };\n"
|
|
" return o;\n"
|
|
" }\n"
|
|
"\n"
|
|
" return f();\n"
|
|
"} )();";
|
|
CheckExpectedProperties(1, os);
|
|
|
|
// Avoid over-/under-allocation for computed property names.
|
|
os << "(function() {\n"
|
|
" 'use strict';\n"
|
|
" function f(x) {\n"
|
|
" var o = {\n"
|
|
" 1: 42,\n" // Do not allocate for index key.
|
|
" '2': 42,\n" // Do not allocate for index key.
|
|
" [x]: 42,\n" // Allocate for property with computed name.
|
|
" 3: 42,\n" // Do not allocate for index key.
|
|
" '4': 42\n" // Do not allocate for index key.
|
|
" };\n"
|
|
" return o;\n"
|
|
" }\n"
|
|
"\n"
|
|
" var x = 'hello'\n"
|
|
"\n"
|
|
" return f(x);\n"
|
|
"} )();";
|
|
CheckExpectedProperties(1, os);
|
|
|
|
// Conversion to index key.
|
|
os << "(function() {\n"
|
|
" function f(x) {\n"
|
|
" var o = {\n"
|
|
" 1: 42,\n" // Do not allocate for index key.
|
|
" '2': 42,\n" // Do not allocate for index key.
|
|
" [x]: 42,\n" // Allocate for property with computed name.
|
|
" 3: 42,\n" // Do not allocate for index key.
|
|
" get 12() {}\n" // Do not allocate for index key.
|
|
" };\n"
|
|
" return o;\n"
|
|
" }\n"
|
|
"\n"
|
|
" var x = 'hello'\n"
|
|
"\n"
|
|
" return f(x);\n"
|
|
"} )();";
|
|
CheckExpectedProperties(1, os);
|
|
|
|
os << "(function() {\n"
|
|
" function f() {\n"
|
|
" var o = {};\n"
|
|
" return o;\n"
|
|
" }\n"
|
|
"\n"
|
|
" return f();\n"
|
|
"} )();";
|
|
// Empty objects have slack for 4 properties.
|
|
CheckExpectedProperties(4, os);
|
|
|
|
os << "(function() {\n"
|
|
" function f(x) {\n"
|
|
" var o = {\n"
|
|
" a: 42,\n" // Allocate for constant property.
|
|
" [x]: 42,\n" // Allocate for property with computed name.
|
|
" b: 42\n" // Allocate for constant property.
|
|
" };\n"
|
|
" return o;\n"
|
|
" }\n"
|
|
"\n"
|
|
" var x = 'hello'\n"
|
|
"\n"
|
|
" return f(x);\n"
|
|
"} )();";
|
|
CheckExpectedProperties(3, os);
|
|
|
|
os << "(function() {\n"
|
|
" function f(x) {\n"
|
|
" var o = {\n"
|
|
" a: 42,\n" // Allocate for constant property.
|
|
" __proto__: 42,\n" // Do not allocate for __proto__.
|
|
" [x]: 42\n" // Allocate for property with computed name.
|
|
" };\n"
|
|
" return o;\n"
|
|
" }\n"
|
|
"\n"
|
|
" var x = 'hello'\n"
|
|
"\n"
|
|
" return f(x);\n"
|
|
"} )();";
|
|
// __proto__ is not allocated in the backing store.
|
|
CheckExpectedProperties(2, os);
|
|
|
|
os << "(function() {\n"
|
|
" function f(x) {\n"
|
|
" var o = {\n"
|
|
" a: 42,\n" // Allocate for constant property.
|
|
" [x]: 42,\n" // Allocate for property with computed name.
|
|
" __proto__: 42\n" // Do not allocate for __proto__.
|
|
" };\n"
|
|
" return o;\n"
|
|
" }\n"
|
|
"\n"
|
|
" var x = 'hello'\n"
|
|
"\n"
|
|
" return f(x);\n"
|
|
"} )();";
|
|
CheckExpectedProperties(2, os);
|
|
}
|
|
|
|
TEST(SlowModeSubclass) {
|
|
if (v8_flags.stress_concurrent_allocation) return;
|
|
|
|
// Avoid eventual completion of in-object slack tracking.
|
|
v8_flags.always_turbofan = false;
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
std::vector<int> hierarchy_desc;
|
|
const int kNoOverflowCount = 5;
|
|
for (int i = 0; i < kNoOverflowCount; i++) {
|
|
hierarchy_desc.push_back(50);
|
|
}
|
|
// This class should go dictionary mode.
|
|
hierarchy_desc.push_back(1000);
|
|
|
|
CreateClassHierarchy(hierarchy_desc);
|
|
|
|
// For the last class in the hierarchy we need different checks.
|
|
{
|
|
int cur_class = kNoOverflowCount;
|
|
std::string class_name = GetClassName(cur_class);
|
|
|
|
// Create |class_name| objects and check slack tracking.
|
|
v8::Local<v8::Script> new_script = GetNewObjectScript(class_name);
|
|
|
|
Handle<JSFunction> func = GetLexical<JSFunction>(class_name);
|
|
|
|
Handle<JSObject> obj = RunI<JSObject>(new_script);
|
|
|
|
CHECK(func->has_initial_map());
|
|
Handle<Map> initial_map(func->initial_map(), func->GetIsolate());
|
|
|
|
// Object should go dictionary mode.
|
|
CHECK_EQ(JSObject::kHeaderSize, obj->map().instance_size());
|
|
CHECK(obj->map().is_dictionary_map());
|
|
|
|
// One instance was created.
|
|
CHECK_EQ(Map::kSlackTrackingCounterStart - 1,
|
|
initial_map->construction_counter());
|
|
CHECK(initial_map->IsInobjectSlackTrackingInProgress());
|
|
|
|
// Create several instances to complete the tracking.
|
|
for (int i = 1; i < Map::kGenerousAllocationCount; i++) {
|
|
CHECK(initial_map->IsInobjectSlackTrackingInProgress());
|
|
Handle<JSObject> tmp = RunI<JSObject>(new_script);
|
|
CHECK(!IsObjectShrinkable(*tmp));
|
|
}
|
|
CHECK(!initial_map->IsInobjectSlackTrackingInProgress());
|
|
CHECK(!IsObjectShrinkable(*obj));
|
|
|
|
// Object should stay in dictionary mode.
|
|
CHECK_EQ(JSObject::kHeaderSize, obj->map().instance_size());
|
|
CHECK(obj->map().is_dictionary_map());
|
|
}
|
|
|
|
// The other classes in the hierarchy are not affected.
|
|
TestClassHierarchy(hierarchy_desc, kNoOverflowCount);
|
|
}
|
|
|
|
|
|
static void TestSubclassBuiltin(const char* subclass_name,
|
|
InstanceType instance_type,
|
|
const char* builtin_name,
|
|
const char* ctor_arguments = "",
|
|
int builtin_properties_count = 0) {
|
|
{
|
|
std::ostringstream os;
|
|
os << "'use strict';\n"
|
|
"class "
|
|
<< subclass_name << " extends " << builtin_name
|
|
<< " {\n"
|
|
" constructor(...args) {\n"
|
|
" super(...args);\n"
|
|
" this.a = 42;\n"
|
|
" this.d = 4.2;\n"
|
|
" this.o = this;\n"
|
|
" }\n"
|
|
"};\n";
|
|
CompileRun(os.str().c_str());
|
|
}
|
|
|
|
Handle<JSFunction> func = GetLexical<JSFunction>(subclass_name);
|
|
|
|
// Zero instances were created so far.
|
|
CHECK(!func->has_initial_map());
|
|
|
|
v8::Local<v8::Script> new_script;
|
|
{
|
|
std::ostringstream os;
|
|
os << "new " << subclass_name << "(" << ctor_arguments << ");";
|
|
new_script = v8_compile(os.str().c_str());
|
|
}
|
|
|
|
RunI<JSObject>(new_script);
|
|
|
|
CHECK(func->has_initial_map());
|
|
Handle<Map> initial_map(func->initial_map(), func->GetIsolate());
|
|
|
|
CHECK_EQ(instance_type, initial_map->instance_type());
|
|
|
|
// One instance of a subclass created.
|
|
CHECK_EQ(Map::kSlackTrackingCounterStart - 1,
|
|
initial_map->construction_counter());
|
|
CHECK(initial_map->IsInobjectSlackTrackingInProgress());
|
|
|
|
// Create two instances in order to ensure that |obj|.o is a data field
|
|
// in case of Function subclassing.
|
|
Handle<JSObject> obj = RunI<JSObject>(new_script);
|
|
|
|
// Two instances of a subclass created.
|
|
CHECK_EQ(Map::kSlackTrackingCounterStart - 2,
|
|
initial_map->construction_counter());
|
|
CHECK(initial_map->IsInobjectSlackTrackingInProgress());
|
|
|
|
// There must be at least some slack.
|
|
CHECK_LT(builtin_properties_count + 5, obj->map().GetInObjectProperties());
|
|
CHECK_EQ(Smi::FromInt(42), GetFieldValue(*obj, builtin_properties_count + 0));
|
|
CHECK_EQ(4.2, GetDoubleFieldValue(*obj, builtin_properties_count + 1));
|
|
CHECK_EQ(*obj, GetFieldValue(*obj, builtin_properties_count + 2));
|
|
CHECK(IsObjectShrinkable(*obj));
|
|
|
|
// Create several subclass instances to complete the tracking.
|
|
for (int i = 2; i < Map::kGenerousAllocationCount; i++) {
|
|
CHECK(initial_map->IsInobjectSlackTrackingInProgress());
|
|
Handle<JSObject> tmp = RunI<JSObject>(new_script);
|
|
CHECK_EQ(initial_map->IsInobjectSlackTrackingInProgress(),
|
|
IsObjectShrinkable(*tmp));
|
|
}
|
|
CHECK(!initial_map->IsInobjectSlackTrackingInProgress());
|
|
CHECK(!IsObjectShrinkable(*obj));
|
|
|
|
// No slack left.
|
|
CHECK_EQ(builtin_properties_count + 3, obj->map().GetInObjectProperties());
|
|
|
|
CHECK_EQ(instance_type, obj->map().instance_type());
|
|
}
|
|
|
|
|
|
TEST(SubclassObjectBuiltin) {
|
|
// Avoid eventual completion of in-object slack tracking.
|
|
v8_flags.always_turbofan = false;
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
TestSubclassBuiltin("A1", JS_OBJECT_TYPE, "Object", "true");
|
|
TestSubclassBuiltin("A2", JS_OBJECT_TYPE, "Object", "42");
|
|
TestSubclassBuiltin("A3", JS_OBJECT_TYPE, "Object", "'some string'");
|
|
}
|
|
|
|
|
|
TEST(SubclassObjectBuiltinNoInlineNew) {
|
|
v8_flags.inline_new = false;
|
|
TestSubclassObjectBuiltin();
|
|
}
|
|
|
|
|
|
TEST(SubclassFunctionBuiltin) {
|
|
// Avoid eventual completion of in-object slack tracking.
|
|
v8_flags.always_turbofan = false;
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
TestSubclassBuiltin("A1", JS_FUNCTION_TYPE, "Function", "'return 153;'");
|
|
TestSubclassBuiltin("A2", JS_FUNCTION_TYPE, "Function", "'this.a = 44;'");
|
|
}
|
|
|
|
|
|
TEST(SubclassFunctionBuiltinNoInlineNew) {
|
|
v8_flags.inline_new = false;
|
|
TestSubclassFunctionBuiltin();
|
|
}
|
|
|
|
|
|
TEST(SubclassBooleanBuiltin) {
|
|
// Avoid eventual completion of in-object slack tracking.
|
|
v8_flags.always_turbofan = false;
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
TestSubclassBuiltin("A1", JS_PRIMITIVE_WRAPPER_TYPE, "Boolean", "true");
|
|
TestSubclassBuiltin("A2", JS_PRIMITIVE_WRAPPER_TYPE, "Boolean", "false");
|
|
}
|
|
|
|
|
|
TEST(SubclassBooleanBuiltinNoInlineNew) {
|
|
v8_flags.inline_new = false;
|
|
TestSubclassBooleanBuiltin();
|
|
}
|
|
|
|
|
|
TEST(SubclassErrorBuiltin) {
|
|
// Avoid eventual completion of in-object slack tracking.
|
|
v8_flags.always_turbofan = false;
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
const int first_field = 2;
|
|
TestSubclassBuiltin("A1", JS_ERROR_TYPE, "Error", "'err'", first_field);
|
|
TestSubclassBuiltin("A2", JS_ERROR_TYPE, "EvalError", "'err'", first_field);
|
|
TestSubclassBuiltin("A3", JS_ERROR_TYPE, "RangeError", "'err'", first_field);
|
|
TestSubclassBuiltin("A4", JS_ERROR_TYPE, "ReferenceError", "'err'",
|
|
first_field);
|
|
TestSubclassBuiltin("A5", JS_ERROR_TYPE, "SyntaxError", "'err'", first_field);
|
|
TestSubclassBuiltin("A6", JS_ERROR_TYPE, "TypeError", "'err'", first_field);
|
|
TestSubclassBuiltin("A7", JS_ERROR_TYPE, "URIError", "'err'", first_field);
|
|
}
|
|
|
|
|
|
TEST(SubclassErrorBuiltinNoInlineNew) {
|
|
v8_flags.inline_new = false;
|
|
TestSubclassErrorBuiltin();
|
|
}
|
|
|
|
|
|
TEST(SubclassNumberBuiltin) {
|
|
// Avoid eventual completion of in-object slack tracking.
|
|
v8_flags.always_turbofan = false;
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
TestSubclassBuiltin("A1", JS_PRIMITIVE_WRAPPER_TYPE, "Number", "42");
|
|
TestSubclassBuiltin("A2", JS_PRIMITIVE_WRAPPER_TYPE, "Number", "4.2");
|
|
}
|
|
|
|
|
|
TEST(SubclassNumberBuiltinNoInlineNew) {
|
|
v8_flags.inline_new = false;
|
|
TestSubclassNumberBuiltin();
|
|
}
|
|
|
|
|
|
TEST(SubclassDateBuiltin) {
|
|
// Avoid eventual completion of in-object slack tracking.
|
|
v8_flags.always_turbofan = false;
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
TestSubclassBuiltin("A1", JS_DATE_TYPE, "Date", "123456789");
|
|
}
|
|
|
|
|
|
TEST(SubclassDateBuiltinNoInlineNew) {
|
|
v8_flags.inline_new = false;
|
|
TestSubclassDateBuiltin();
|
|
}
|
|
|
|
|
|
TEST(SubclassStringBuiltin) {
|
|
// Avoid eventual completion of in-object slack tracking.
|
|
v8_flags.always_turbofan = false;
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
TestSubclassBuiltin("A1", JS_PRIMITIVE_WRAPPER_TYPE, "String",
|
|
"'some string'");
|
|
TestSubclassBuiltin("A2", JS_PRIMITIVE_WRAPPER_TYPE, "String", "");
|
|
}
|
|
|
|
|
|
TEST(SubclassStringBuiltinNoInlineNew) {
|
|
v8_flags.inline_new = false;
|
|
TestSubclassStringBuiltin();
|
|
}
|
|
|
|
|
|
TEST(SubclassRegExpBuiltin) {
|
|
// Avoid eventual completion of in-object slack tracking.
|
|
v8_flags.always_turbofan = false;
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
const int first_field = 1;
|
|
TestSubclassBuiltin("A1", JS_REG_EXP_TYPE, "RegExp", "'o(..)h', 'g'",
|
|
first_field);
|
|
}
|
|
|
|
|
|
TEST(SubclassRegExpBuiltinNoInlineNew) {
|
|
v8_flags.inline_new = false;
|
|
TestSubclassRegExpBuiltin();
|
|
}
|
|
|
|
|
|
TEST(SubclassArrayBuiltin) {
|
|
// Avoid eventual completion of in-object slack tracking.
|
|
v8_flags.always_turbofan = false;
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
TestSubclassBuiltin("A1", JS_ARRAY_TYPE, "Array", "42");
|
|
}
|
|
|
|
|
|
TEST(SubclassArrayBuiltinNoInlineNew) {
|
|
v8_flags.inline_new = false;
|
|
TestSubclassArrayBuiltin();
|
|
}
|
|
|
|
|
|
TEST(SubclassTypedArrayBuiltin) {
|
|
// Avoid eventual completion of in-object slack tracking.
|
|
v8_flags.always_turbofan = false;
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
#define TYPED_ARRAY_TEST(Type, type, TYPE, elementType) \
|
|
TestSubclassBuiltin("A" #Type, JS_TYPED_ARRAY_TYPE, #Type "Array", "42");
|
|
|
|
TYPED_ARRAYS(TYPED_ARRAY_TEST)
|
|
|
|
#undef TYPED_ARRAY_TEST
|
|
}
|
|
|
|
|
|
TEST(SubclassTypedArrayBuiltinNoInlineNew) {
|
|
v8_flags.inline_new = false;
|
|
TestSubclassTypedArrayBuiltin();
|
|
}
|
|
|
|
|
|
TEST(SubclassCollectionBuiltin) {
|
|
// Avoid eventual completion of in-object slack tracking.
|
|
v8_flags.always_turbofan = false;
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
TestSubclassBuiltin("A1", JS_SET_TYPE, "Set", "");
|
|
TestSubclassBuiltin("A2", JS_MAP_TYPE, "Map", "");
|
|
TestSubclassBuiltin("A3", JS_WEAK_SET_TYPE, "WeakSet", "");
|
|
TestSubclassBuiltin("A4", JS_WEAK_MAP_TYPE, "WeakMap", "");
|
|
}
|
|
|
|
|
|
TEST(SubclassCollectionBuiltinNoInlineNew) {
|
|
v8_flags.inline_new = false;
|
|
TestSubclassCollectionBuiltin();
|
|
}
|
|
|
|
|
|
TEST(SubclassArrayBufferBuiltin) {
|
|
// Avoid eventual completion of in-object slack tracking.
|
|
v8_flags.always_turbofan = false;
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
TestSubclassBuiltin("A1", JS_ARRAY_BUFFER_TYPE, "ArrayBuffer", "42");
|
|
TestSubclassBuiltin("A2", JS_DATA_VIEW_TYPE, "DataView",
|
|
"new ArrayBuffer(42)");
|
|
}
|
|
|
|
|
|
TEST(SubclassArrayBufferBuiltinNoInlineNew) {
|
|
v8_flags.inline_new = false;
|
|
TestSubclassArrayBufferBuiltin();
|
|
}
|
|
|
|
|
|
TEST(SubclassPromiseBuiltin) {
|
|
// Avoid eventual completion of in-object slack tracking.
|
|
v8_flags.always_turbofan = false;
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
TestSubclassBuiltin("A1", JS_PROMISE_TYPE, "Promise",
|
|
"function(resolve, reject) { resolve('ok'); }");
|
|
}
|
|
|
|
|
|
TEST(SubclassPromiseBuiltinNoInlineNew) {
|
|
v8_flags.inline_new = false;
|
|
TestSubclassPromiseBuiltin();
|
|
}
|
|
|
|
TEST(SubclassTranspiledClassHierarchy) {
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
CompileRun(
|
|
"Object.setPrototypeOf(B, A);\n"
|
|
"function A() {\n"
|
|
" this.a0 = 0;\n"
|
|
" this.a1 = 1;\n"
|
|
" this.a2 = 1;\n"
|
|
" this.a3 = 1;\n"
|
|
" this.a4 = 1;\n"
|
|
" this.a5 = 1;\n"
|
|
" this.a6 = 1;\n"
|
|
" this.a7 = 1;\n"
|
|
" this.a8 = 1;\n"
|
|
" this.a9 = 1;\n"
|
|
" this.a10 = 1;\n"
|
|
" this.a11 = 1;\n"
|
|
" this.a12 = 1;\n"
|
|
" this.a13 = 1;\n"
|
|
" this.a14 = 1;\n"
|
|
" this.a15 = 1;\n"
|
|
" this.a16 = 1;\n"
|
|
" this.a17 = 1;\n"
|
|
" this.a18 = 1;\n"
|
|
" this.a19 = 1;\n"
|
|
"};\n"
|
|
"function B() {\n"
|
|
" A.call(this);\n"
|
|
" this.b = 1;\n"
|
|
"};\n");
|
|
|
|
Handle<JSFunction> func = GetGlobal<JSFunction>("B");
|
|
|
|
// Zero instances have been created so far.
|
|
CHECK(!func->has_initial_map());
|
|
|
|
v8::Local<v8::Script> new_script = v8_compile("new B()");
|
|
|
|
RunI<JSObject>(new_script);
|
|
|
|
CHECK(func->has_initial_map());
|
|
Handle<Map> initial_map(func->initial_map(), func->GetIsolate());
|
|
|
|
CHECK_EQ(JS_OBJECT_TYPE, initial_map->instance_type());
|
|
|
|
// One instance of a subclass created.
|
|
CHECK_EQ(Map::kSlackTrackingCounterStart - 1,
|
|
initial_map->construction_counter());
|
|
CHECK(initial_map->IsInobjectSlackTrackingInProgress());
|
|
|
|
// Create two instances in order to ensure that |obj|.o is a data field
|
|
// in case of Function subclassing.
|
|
Handle<JSObject> obj = RunI<JSObject>(new_script);
|
|
|
|
// Two instances of a subclass created.
|
|
CHECK_EQ(Map::kSlackTrackingCounterStart - 2,
|
|
initial_map->construction_counter());
|
|
CHECK(initial_map->IsInobjectSlackTrackingInProgress());
|
|
CHECK(IsObjectShrinkable(*obj));
|
|
|
|
// Create several subclass instances to complete the tracking.
|
|
for (int i = 2; i < Map::kGenerousAllocationCount; i++) {
|
|
CHECK(initial_map->IsInobjectSlackTrackingInProgress());
|
|
Handle<JSObject> tmp = RunI<JSObject>(new_script);
|
|
CHECK_EQ(initial_map->IsInobjectSlackTrackingInProgress(),
|
|
IsObjectShrinkable(*tmp));
|
|
}
|
|
CHECK(!initial_map->IsInobjectSlackTrackingInProgress());
|
|
CHECK(!IsObjectShrinkable(*obj));
|
|
|
|
// No slack left.
|
|
CHECK_EQ(21, obj->map().GetInObjectProperties());
|
|
CHECK_EQ(JS_OBJECT_TYPE, obj->map().instance_type());
|
|
}
|
|
|
|
TEST(Regress8853_ClassConstructor) {
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
// For classes without any this.prop assignments in their
|
|
// constructors we start out with 10 inobject properties.
|
|
Handle<JSObject> obj = CompileRunI<JSObject>("new (class {});\n");
|
|
CHECK(obj->map().IsInobjectSlackTrackingInProgress());
|
|
CHECK(IsObjectShrinkable(*obj));
|
|
CHECK_EQ(10, obj->map().GetInObjectProperties());
|
|
|
|
// For classes with N explicit this.prop assignments in their
|
|
// constructors we start out with N+8 inobject properties.
|
|
obj = CompileRunI<JSObject>(
|
|
"new (class {\n"
|
|
" constructor() {\n"
|
|
" this.x = 1;\n"
|
|
" this.y = 2;\n"
|
|
" this.z = 3;\n"
|
|
" }\n"
|
|
"});\n");
|
|
CHECK(obj->map().IsInobjectSlackTrackingInProgress());
|
|
CHECK(IsObjectShrinkable(*obj));
|
|
CHECK_EQ(3 + 8, obj->map().GetInObjectProperties());
|
|
}
|
|
|
|
TEST(Regress8853_ClassHierarchy) {
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
// For class hierarchies without any this.prop assignments in their
|
|
// constructors we reserve 2 inobject properties per constructor plus
|
|
// 8 inobject properties slack on top.
|
|
std::string base = "(class {})";
|
|
for (int i = 1; i < 10; ++i) {
|
|
std::string script = "new " + base + ";\n";
|
|
Handle<JSObject> obj = CompileRunI<JSObject>(script.c_str());
|
|
CHECK(obj->map().IsInobjectSlackTrackingInProgress());
|
|
CHECK(IsObjectShrinkable(*obj));
|
|
CHECK_EQ(8 + 2 * i, obj->map().GetInObjectProperties());
|
|
base = "(class extends " + base + " {})";
|
|
}
|
|
}
|
|
|
|
TEST(Regress8853_FunctionConstructor) {
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
// For constructor functions without any this.prop assignments in
|
|
// them we start out with 10 inobject properties.
|
|
Handle<JSObject> obj = CompileRunI<JSObject>("new (function() {});\n");
|
|
CHECK(obj->map().IsInobjectSlackTrackingInProgress());
|
|
CHECK(IsObjectShrinkable(*obj));
|
|
CHECK_EQ(10, obj->map().GetInObjectProperties());
|
|
|
|
// For constructor functions with N explicit this.prop assignments
|
|
// in them we start out with N+8 inobject properties.
|
|
obj = CompileRunI<JSObject>(
|
|
"new (function() {\n"
|
|
" this.a = 1;\n"
|
|
" this.b = 2;\n"
|
|
" this.c = 3;\n"
|
|
" this.d = 3;\n"
|
|
" this.c = 3;\n"
|
|
" this.f = 3;\n"
|
|
"});\n");
|
|
CHECK(obj->map().IsInobjectSlackTrackingInProgress());
|
|
CHECK(IsObjectShrinkable(*obj));
|
|
CHECK_EQ(6 + 8, obj->map().GetInObjectProperties());
|
|
}
|
|
|
|
TEST(InstanceFieldsArePropertiesDefaultConstructorLazy) {
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
Handle<JSObject> obj = CompileRunI<JSObject>(
|
|
"new (class {\n"
|
|
" x00 = null;\n"
|
|
" x01 = null;\n"
|
|
" x02 = null;\n"
|
|
" x03 = null;\n"
|
|
" x04 = null;\n"
|
|
" x05 = null;\n"
|
|
" x06 = null;\n"
|
|
" x07 = null;\n"
|
|
" x08 = null;\n"
|
|
" x09 = null;\n"
|
|
" x10 = null;\n"
|
|
"});\n");
|
|
CHECK_EQ(11 + 8, obj->map().GetInObjectProperties());
|
|
}
|
|
|
|
TEST(InstanceFieldsArePropertiesFieldsAndConstructorLazy) {
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
Handle<JSObject> obj = CompileRunI<JSObject>(
|
|
"new (class {\n"
|
|
" x00 = null;\n"
|
|
" x01 = null;\n"
|
|
" x02 = null;\n"
|
|
" x03 = null;\n"
|
|
" x04 = null;\n"
|
|
" x05 = null;\n"
|
|
" x06 = null;\n"
|
|
" x07 = null;\n"
|
|
" x08 = null;\n"
|
|
" x09 = null;\n"
|
|
" x10 = null;\n"
|
|
" constructor() {\n"
|
|
" this.x11 = null;\n"
|
|
" this.x12 = null;\n"
|
|
" this.x12 = null;\n"
|
|
" this.x14 = null;\n"
|
|
" this.x15 = null;\n"
|
|
" this.x16 = null;\n"
|
|
" this.x17 = null;\n"
|
|
" this.x18 = null;\n"
|
|
" this.x19 = null;\n"
|
|
" this.x20 = null;\n"
|
|
" }\n"
|
|
"});\n");
|
|
CHECK_EQ(21 + 8, obj->map().GetInObjectProperties());
|
|
}
|
|
|
|
TEST(InstanceFieldsArePropertiesDefaultConstructorEager) {
|
|
i::v8_flags.lazy = false;
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
Handle<JSObject> obj = CompileRunI<JSObject>(
|
|
"new (class {\n"
|
|
" x00 = null;\n"
|
|
" x01 = null;\n"
|
|
" x02 = null;\n"
|
|
" x03 = null;\n"
|
|
" x04 = null;\n"
|
|
" x05 = null;\n"
|
|
" x06 = null;\n"
|
|
" x07 = null;\n"
|
|
" x08 = null;\n"
|
|
" x09 = null;\n"
|
|
" x10 = null;\n"
|
|
"});\n");
|
|
CHECK_EQ(11 + 8, obj->map().GetInObjectProperties());
|
|
}
|
|
|
|
TEST(InstanceFieldsArePropertiesFieldsAndConstructorEager) {
|
|
i::v8_flags.lazy = false;
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
Handle<JSObject> obj = CompileRunI<JSObject>(
|
|
"new (class {\n"
|
|
" x00 = null;\n"
|
|
" x01 = null;\n"
|
|
" x02 = null;\n"
|
|
" x03 = null;\n"
|
|
" x04 = null;\n"
|
|
" x05 = null;\n"
|
|
" x06 = null;\n"
|
|
" x07 = null;\n"
|
|
" x08 = null;\n"
|
|
" x09 = null;\n"
|
|
" x10 = null;\n"
|
|
" constructor() {\n"
|
|
" this.x11 = null;\n"
|
|
" this.x12 = null;\n"
|
|
" this.x12 = null;\n"
|
|
" this.x14 = null;\n"
|
|
" this.x15 = null;\n"
|
|
" this.x16 = null;\n"
|
|
" this.x17 = null;\n"
|
|
" this.x18 = null;\n"
|
|
" this.x19 = null;\n"
|
|
" this.x20 = null;\n"
|
|
" }\n"
|
|
"});\n");
|
|
CHECK_EQ(21 + 8, obj->map().GetInObjectProperties());
|
|
}
|
|
|
|
} // namespace test_inobject_slack_tracking
|
|
} // namespace internal
|
|
} // namespace v8
|