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606 lines
19 KiB
606 lines
19 KiB
// 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 "src/v8.h"
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#include "test/cctest/cctest.h"
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#include "src/api.h"
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#include "src/debug/debug.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/macro-assembler.h"
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#include "src/objects.h"
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#include "test/cctest/test-feedback-vector.h"
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using namespace v8::internal;
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namespace {
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#define CHECK_SLOT_KIND(helper, index, expected_kind) \
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CHECK_EQ(expected_kind, helper.vector()->GetKind(helper.slot(index)));
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static Handle<JSFunction> GetFunction(const char* name) {
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v8::MaybeLocal<v8::Value> v8_f = CcTest::global()->Get(
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v8::Isolate::GetCurrent()->GetCurrentContext(), v8_str(name));
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Handle<JSFunction> f =
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Handle<JSFunction>::cast(v8::Utils::OpenHandle(*v8_f.ToLocalChecked()));
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return f;
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}
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TEST(VectorStructure) {
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LocalContext context;
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v8::HandleScope scope(context->GetIsolate());
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Isolate* isolate = CcTest::i_isolate();
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Factory* factory = isolate->factory();
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Zone zone(isolate->allocator(), ZONE_NAME);
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// Empty vectors are the empty fixed array.
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StaticFeedbackVectorSpec empty;
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Handle<FeedbackVector> vector = NewFeedbackVector(isolate, &empty);
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CHECK(Handle<FixedArray>::cast(vector).is_identical_to(
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factory->empty_feedback_vector()));
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// Which can nonetheless be queried.
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CHECK(vector->is_empty());
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{
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FeedbackVectorSpec one_slot(&zone);
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one_slot.AddGeneralSlot();
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vector = NewFeedbackVector(isolate, &one_slot);
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FeedbackVectorHelper helper(vector);
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CHECK_EQ(1, helper.slot_count());
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}
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{
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FeedbackVectorSpec one_icslot(&zone);
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one_icslot.AddCallICSlot();
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vector = NewFeedbackVector(isolate, &one_icslot);
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FeedbackVectorHelper helper(vector);
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CHECK_EQ(1, helper.slot_count());
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}
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{
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FeedbackVectorSpec spec(&zone);
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for (int i = 0; i < 3; i++) {
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spec.AddGeneralSlot();
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}
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for (int i = 0; i < 5; i++) {
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spec.AddCallICSlot();
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}
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vector = NewFeedbackVector(isolate, &spec);
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FeedbackVectorHelper helper(vector);
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CHECK_EQ(8, helper.slot_count());
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int index = vector->GetIndex(helper.slot(0));
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CHECK_EQ(FeedbackVector::kReservedIndexCount, index);
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CHECK_EQ(helper.slot(0), vector->ToSlot(index));
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index = vector->GetIndex(helper.slot(3));
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CHECK_EQ(FeedbackVector::kReservedIndexCount + 3, index);
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CHECK_EQ(helper.slot(3), vector->ToSlot(index));
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index = vector->GetIndex(helper.slot(7));
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CHECK_EQ(
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FeedbackVector::kReservedIndexCount + 3 +
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4 * FeedbackMetadata::GetSlotSize(FeedbackVectorSlotKind::CALL_IC),
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index);
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CHECK_EQ(helper.slot(7), vector->ToSlot(index));
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CHECK_EQ(
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FeedbackVector::kReservedIndexCount + 3 +
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5 * FeedbackMetadata::GetSlotSize(FeedbackVectorSlotKind::CALL_IC),
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vector->length());
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}
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{
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FeedbackVectorSpec spec(&zone);
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spec.AddGeneralSlot();
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spec.AddCreateClosureSlot(5);
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spec.AddGeneralSlot();
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vector = NewFeedbackVector(isolate, &spec);
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FeedbackVectorHelper helper(vector);
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CHECK_EQ(1, FeedbackMetadata::GetSlotSize(
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FeedbackVectorSlotKind::CREATE_CLOSURE));
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FeedbackVectorSlot slot = helper.slot(1);
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FixedArray* array = FixedArray::cast(vector->Get(slot));
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CHECK_EQ(array, *factory->empty_literals_array());
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}
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}
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// IC slots need an encoding to recognize what is in there.
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TEST(VectorICMetadata) {
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LocalContext context;
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v8::HandleScope scope(context->GetIsolate());
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Isolate* isolate = CcTest::i_isolate();
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Zone zone(isolate->allocator(), ZONE_NAME);
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FeedbackVectorSpec spec(&zone);
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// Set metadata.
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for (int i = 0; i < 40; i++) {
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switch (i % 4) {
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case 0:
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spec.AddGeneralSlot();
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break;
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case 1:
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spec.AddCallICSlot();
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break;
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case 2:
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spec.AddLoadICSlot();
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break;
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case 3:
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spec.AddKeyedLoadICSlot();
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break;
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}
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}
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Handle<FeedbackVector> vector = NewFeedbackVector(isolate, &spec);
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FeedbackVectorHelper helper(vector);
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CHECK_EQ(40, helper.slot_count());
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// Meanwhile set some feedback values and type feedback values to
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// verify the data structure remains intact.
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vector->Set(FeedbackVectorSlot(0), *vector);
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// Verify the metadata is correctly set up from the spec.
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for (int i = 0; i < 40; i++) {
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FeedbackVectorSlotKind kind = vector->GetKind(helper.slot(i));
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switch (i % 4) {
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case 0:
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CHECK_EQ(FeedbackVectorSlotKind::GENERAL, kind);
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break;
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case 1:
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CHECK_EQ(FeedbackVectorSlotKind::CALL_IC, kind);
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break;
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case 2:
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CHECK_EQ(FeedbackVectorSlotKind::LOAD_IC, kind);
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break;
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case 3:
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CHECK_EQ(FeedbackVectorSlotKind::KEYED_LOAD_IC, kind);
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break;
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}
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}
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}
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TEST(VectorSlotClearing) {
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LocalContext context;
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v8::HandleScope scope(context->GetIsolate());
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Isolate* isolate = CcTest::i_isolate();
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Factory* factory = isolate->factory();
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Zone zone(isolate->allocator(), ZONE_NAME);
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// We only test clearing FeedbackVectorSlots, not FeedbackVectorSlots.
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// The reason is that FeedbackVectorSlots need a full code environment
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// to fully test (See VectorICProfilerStatistics test below).
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FeedbackVectorSpec spec(&zone);
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for (int i = 0; i < 5; i++) {
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spec.AddGeneralSlot();
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}
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Handle<FeedbackVector> vector = NewFeedbackVector(isolate, &spec);
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FeedbackVectorHelper helper(vector);
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// Fill with information
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vector->Set(helper.slot(0), Smi::FromInt(1));
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Handle<WeakCell> cell = factory->NewWeakCell(factory->fixed_array_map());
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vector->Set(helper.slot(1), *cell);
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Handle<AllocationSite> site = factory->NewAllocationSite();
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vector->Set(helper.slot(2), *site);
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// GC time clearing leaves slots alone.
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vector->ClearSlotsAtGCTime(NULL);
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Object* obj = vector->Get(helper.slot(1));
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CHECK(obj->IsWeakCell() && !WeakCell::cast(obj)->cleared());
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vector->ClearSlots(NULL);
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// The feedback vector slots are cleared. AllocationSites are still granted
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// an exemption from clearing, as are smis.
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CHECK_EQ(Smi::FromInt(1), vector->Get(helper.slot(0)));
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CHECK_EQ(*FeedbackVector::UninitializedSentinel(isolate),
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vector->Get(helper.slot(1)));
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CHECK(vector->Get(helper.slot(2))->IsAllocationSite());
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}
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TEST(VectorCallICStates) {
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if (i::FLAG_always_opt) return;
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CcTest::InitializeVM();
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LocalContext context;
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v8::HandleScope scope(context->GetIsolate());
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Isolate* isolate = CcTest::i_isolate();
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// Make sure function f has a call that uses a type feedback slot.
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CompileRun(
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"function foo() { return 17; }"
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"function f(a) { a(); } f(foo);");
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Handle<JSFunction> f = GetFunction("f");
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// There should be one IC.
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Handle<FeedbackVector> feedback_vector =
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Handle<FeedbackVector>(f->feedback_vector(), isolate);
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FeedbackVectorSlot slot(0);
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CallICNexus nexus(feedback_vector, slot);
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CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
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// CallIC doesn't return map feedback.
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CHECK(!nexus.FindFirstMap());
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CompileRun("f(function() { return 16; })");
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CHECK_EQ(GENERIC, nexus.StateFromFeedback());
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// After a collection, state should remain GENERIC.
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CcTest::CollectAllGarbage(i::Heap::kFinalizeIncrementalMarkingMask);
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CHECK_EQ(GENERIC, nexus.StateFromFeedback());
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}
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TEST(VectorCallFeedbackForArray) {
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if (i::FLAG_always_opt) return;
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CcTest::InitializeVM();
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LocalContext context;
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v8::HandleScope scope(context->GetIsolate());
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Isolate* isolate = CcTest::i_isolate();
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// Make sure function f has a call that uses a type feedback slot.
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CompileRun(
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"function foo() { return 17; }"
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"function f(a) { a(); } f(Array);");
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Handle<JSFunction> f = GetFunction("f");
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// There should be one IC.
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Handle<FeedbackVector> feedback_vector =
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Handle<FeedbackVector>(f->feedback_vector(), isolate);
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FeedbackVectorSlot slot(0);
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CallICNexus nexus(feedback_vector, slot);
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// A call to Array is special, it contains an AllocationSite as feedback.
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CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
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CHECK(nexus.GetFeedback()->IsAllocationSite());
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CcTest::CollectAllGarbage(i::Heap::kFinalizeIncrementalMarkingMask);
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// It should stay monomorphic even after a GC.
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CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
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}
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TEST(VectorCallCounts) {
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if (i::FLAG_always_opt) return;
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CcTest::InitializeVM();
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LocalContext context;
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v8::HandleScope scope(context->GetIsolate());
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Isolate* isolate = CcTest::i_isolate();
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// Make sure function f has a call that uses a type feedback slot.
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CompileRun(
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"function foo() { return 17; }"
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"function f(a) { a(); } f(foo);");
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Handle<JSFunction> f = GetFunction("f");
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// There should be one IC.
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Handle<FeedbackVector> feedback_vector =
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Handle<FeedbackVector>(f->feedback_vector(), isolate);
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FeedbackVectorSlot slot(0);
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CallICNexus nexus(feedback_vector, slot);
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CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
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CompileRun("f(foo); f(foo);");
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CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
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CHECK_EQ(3, nexus.ExtractCallCount());
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// Send the IC megamorphic, but we should still have incrementing counts.
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CompileRun("f(function() { return 12; });");
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CHECK_EQ(GENERIC, nexus.StateFromFeedback());
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CHECK_EQ(4, nexus.ExtractCallCount());
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}
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TEST(VectorConstructCounts) {
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if (i::FLAG_always_opt) return;
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CcTest::InitializeVM();
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LocalContext context;
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v8::HandleScope scope(context->GetIsolate());
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Isolate* isolate = CcTest::i_isolate();
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// Make sure function f has a call that uses a type feedback slot.
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CompileRun(
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"function Foo() {}"
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"function f(a) { new a(); } f(Foo);");
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Handle<JSFunction> f = GetFunction("f");
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Handle<FeedbackVector> feedback_vector =
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Handle<FeedbackVector>(f->feedback_vector(), isolate);
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FeedbackVectorSlot slot(0);
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CallICNexus nexus(feedback_vector, slot);
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CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
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CHECK(feedback_vector->Get(slot)->IsWeakCell());
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CompileRun("f(Foo); f(Foo);");
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CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
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CHECK_EQ(3, nexus.ExtractCallCount());
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// Send the IC megamorphic, but we should still have incrementing counts.
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CompileRun("f(function() {});");
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CHECK_EQ(GENERIC, nexus.StateFromFeedback());
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CHECK_EQ(4, nexus.ExtractCallCount());
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}
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TEST(VectorLoadICStates) {
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if (i::FLAG_always_opt) return;
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CcTest::InitializeVM();
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LocalContext context;
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v8::HandleScope scope(context->GetIsolate());
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Isolate* isolate = CcTest::i_isolate();
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// Make sure function f has a call that uses a type feedback slot.
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CompileRun(
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"var o = { foo: 3 };"
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"function f(a) { return a.foo; } f(o);");
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Handle<JSFunction> f = GetFunction("f");
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// There should be one IC.
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Handle<FeedbackVector> feedback_vector =
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Handle<FeedbackVector>(f->feedback_vector(), isolate);
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FeedbackVectorSlot slot(0);
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LoadICNexus nexus(feedback_vector, slot);
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CHECK_EQ(PREMONOMORPHIC, nexus.StateFromFeedback());
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CompileRun("f(o)");
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CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
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// Verify that the monomorphic map is the one we expect.
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v8::MaybeLocal<v8::Value> v8_o =
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CcTest::global()->Get(context.local(), v8_str("o"));
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Handle<JSObject> o =
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Handle<JSObject>::cast(v8::Utils::OpenHandle(*v8_o.ToLocalChecked()));
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CHECK_EQ(o->map(), nexus.FindFirstMap());
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// Now go polymorphic.
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CompileRun("f({ blarg: 3, foo: 2 })");
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CHECK_EQ(POLYMORPHIC, nexus.StateFromFeedback());
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CompileRun(
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"delete o.foo;"
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"f(o)");
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CHECK_EQ(POLYMORPHIC, nexus.StateFromFeedback());
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CompileRun("f({ blarg: 3, torino: 10, foo: 2 })");
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CHECK_EQ(POLYMORPHIC, nexus.StateFromFeedback());
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MapHandleList maps;
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nexus.FindAllMaps(&maps);
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CHECK_EQ(4, maps.length());
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// Finally driven megamorphic.
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CompileRun("f({ blarg: 3, gran: 3, torino: 10, foo: 2 })");
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CHECK_EQ(MEGAMORPHIC, nexus.StateFromFeedback());
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CHECK(!nexus.FindFirstMap());
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// After a collection, state should not be reset to PREMONOMORPHIC.
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CcTest::CollectAllGarbage(i::Heap::kFinalizeIncrementalMarkingMask);
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CHECK_EQ(MEGAMORPHIC, nexus.StateFromFeedback());
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}
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TEST(VectorLoadICSlotSharing) {
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if (i::FLAG_always_opt) return;
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CcTest::InitializeVM();
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LocalContext context;
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v8::HandleScope scope(context->GetIsolate());
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Isolate* isolate = CcTest::i_isolate();
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// Function f has 3 LoadICs, one for each o, but the ICs share the same
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// feedback vector IC slot.
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CompileRun(
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"o = 10;"
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"function f() {"
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" var x = o || 10;"
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" return o , x , o;"
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"}"
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"f();");
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Handle<JSFunction> f = GetFunction("f");
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// There should be one IC slot.
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Handle<FeedbackVector> feedback_vector =
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Handle<FeedbackVector>(f->feedback_vector(), isolate);
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FeedbackVectorHelper helper(feedback_vector);
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CHECK_EQ(1, helper.slot_count());
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FeedbackVectorSlot slot(0);
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LoadGlobalICNexus nexus(feedback_vector, slot);
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CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
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}
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TEST(VectorLoadICOnSmi) {
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if (i::FLAG_always_opt) return;
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CcTest::InitializeVM();
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LocalContext context;
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v8::HandleScope scope(context->GetIsolate());
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Isolate* isolate = CcTest::i_isolate();
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Heap* heap = isolate->heap();
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// Make sure function f has a call that uses a type feedback slot.
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CompileRun(
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"var o = { foo: 3 };"
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"function f(a) { return a.foo; } f(o);");
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Handle<JSFunction> f = GetFunction("f");
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// There should be one IC.
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Handle<FeedbackVector> feedback_vector =
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Handle<FeedbackVector>(f->feedback_vector(), isolate);
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FeedbackVectorSlot slot(0);
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LoadICNexus nexus(feedback_vector, slot);
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CHECK_EQ(PREMONOMORPHIC, nexus.StateFromFeedback());
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CompileRun("f(34)");
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CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
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// Verify that the monomorphic map is the one we expect.
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Map* number_map = heap->heap_number_map();
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CHECK_EQ(number_map, nexus.FindFirstMap());
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// Now go polymorphic on o.
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CompileRun("f(o)");
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CHECK_EQ(POLYMORPHIC, nexus.StateFromFeedback());
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MapHandleList maps;
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nexus.FindAllMaps(&maps);
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CHECK_EQ(2, maps.length());
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// One of the maps should be the o map.
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v8::MaybeLocal<v8::Value> v8_o =
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CcTest::global()->Get(context.local(), v8_str("o"));
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Handle<JSObject> o =
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Handle<JSObject>::cast(v8::Utils::OpenHandle(*v8_o.ToLocalChecked()));
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bool number_map_found = false;
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bool o_map_found = false;
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for (int i = 0; i < maps.length(); i++) {
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Handle<Map> current = maps[i];
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if (*current == number_map)
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number_map_found = true;
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else if (*current == o->map())
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o_map_found = true;
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}
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CHECK(number_map_found && o_map_found);
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// The degree of polymorphism doesn't change.
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CompileRun("f(100)");
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CHECK_EQ(POLYMORPHIC, nexus.StateFromFeedback());
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MapHandleList maps2;
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nexus.FindAllMaps(&maps2);
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CHECK_EQ(2, maps2.length());
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}
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TEST(ReferenceContextAllocatesNoSlots) {
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if (i::FLAG_always_opt) return;
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CcTest::InitializeVM();
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LocalContext context;
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v8::HandleScope scope(context->GetIsolate());
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Isolate* isolate = CcTest::i_isolate();
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{
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CompileRun(
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"function testvar(x) {"
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" y = x;"
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" y = a;"
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" return y;"
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"}"
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"a = 3;"
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"testvar({});");
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Handle<JSFunction> f = GetFunction("testvar");
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// There should be two LOAD_ICs, one for a and one for y at the end.
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Handle<FeedbackVector> feedback_vector =
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handle(f->feedback_vector(), isolate);
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FeedbackVectorHelper helper(feedback_vector);
|
|
CHECK_EQ(4, helper.slot_count());
|
|
CHECK_SLOT_KIND(helper, 0, FeedbackVectorSlotKind::STORE_IC);
|
|
CHECK_SLOT_KIND(helper, 1, FeedbackVectorSlotKind::LOAD_GLOBAL_IC);
|
|
CHECK_SLOT_KIND(helper, 2, FeedbackVectorSlotKind::STORE_IC);
|
|
CHECK_SLOT_KIND(helper, 3, FeedbackVectorSlotKind::LOAD_GLOBAL_IC);
|
|
}
|
|
|
|
{
|
|
CompileRun(
|
|
"function testprop(x) {"
|
|
" x.blue = a;"
|
|
"}"
|
|
"testprop({ blue: 3 });");
|
|
|
|
Handle<JSFunction> f = GetFunction("testprop");
|
|
|
|
// There should be one LOAD_IC, for the load of a.
|
|
Handle<FeedbackVector> feedback_vector(f->feedback_vector());
|
|
FeedbackVectorHelper helper(feedback_vector);
|
|
CHECK_EQ(2, helper.slot_count());
|
|
CHECK_SLOT_KIND(helper, 0, FeedbackVectorSlotKind::LOAD_GLOBAL_IC);
|
|
CHECK_SLOT_KIND(helper, 1, FeedbackVectorSlotKind::STORE_IC);
|
|
}
|
|
|
|
{
|
|
CompileRun(
|
|
"function testpropfunc(x) {"
|
|
" x().blue = a;"
|
|
" return x().blue;"
|
|
"}"
|
|
"function makeresult() { return { blue: 3 }; }"
|
|
"testpropfunc(makeresult);");
|
|
|
|
Handle<JSFunction> f = GetFunction("testpropfunc");
|
|
|
|
// There should be 1 LOAD_GLOBAL_IC to load x (in both cases), 2 CALL_ICs
|
|
// to call x and a LOAD_IC to load blue.
|
|
Handle<FeedbackVector> feedback_vector(f->feedback_vector());
|
|
FeedbackVectorHelper helper(feedback_vector);
|
|
CHECK_EQ(5, helper.slot_count());
|
|
CHECK_SLOT_KIND(helper, 0, FeedbackVectorSlotKind::CALL_IC);
|
|
CHECK_SLOT_KIND(helper, 1, FeedbackVectorSlotKind::LOAD_GLOBAL_IC);
|
|
CHECK_SLOT_KIND(helper, 2, FeedbackVectorSlotKind::STORE_IC);
|
|
CHECK_SLOT_KIND(helper, 3, FeedbackVectorSlotKind::CALL_IC);
|
|
CHECK_SLOT_KIND(helper, 4, FeedbackVectorSlotKind::LOAD_IC);
|
|
}
|
|
|
|
{
|
|
CompileRun(
|
|
"function testkeyedprop(x) {"
|
|
" x[0] = a;"
|
|
" return x[0];"
|
|
"}"
|
|
"testkeyedprop([0, 1, 2]);");
|
|
|
|
Handle<JSFunction> f = GetFunction("testkeyedprop");
|
|
|
|
// There should be 1 LOAD_GLOBAL_ICs for the load of a, and one
|
|
// KEYED_LOAD_IC for the load of x[0] in the return statement.
|
|
Handle<FeedbackVector> feedback_vector(f->feedback_vector());
|
|
FeedbackVectorHelper helper(feedback_vector);
|
|
CHECK_EQ(3, helper.slot_count());
|
|
CHECK_SLOT_KIND(helper, 0, FeedbackVectorSlotKind::LOAD_GLOBAL_IC);
|
|
CHECK_SLOT_KIND(helper, 1, FeedbackVectorSlotKind::KEYED_STORE_IC);
|
|
CHECK_SLOT_KIND(helper, 2, FeedbackVectorSlotKind::KEYED_LOAD_IC);
|
|
}
|
|
|
|
{
|
|
CompileRun(
|
|
"function testcompound(x) {"
|
|
" x.old = x.young = x.in_between = a;"
|
|
" return x.old + x.young;"
|
|
"}"
|
|
"testcompound({ old: 3, young: 3, in_between: 3 });");
|
|
|
|
Handle<JSFunction> f = GetFunction("testcompound");
|
|
|
|
// There should be 1 LOAD_GLOBAL_IC for load of a and 2 LOAD_ICs, for load
|
|
// of x.old and x.young.
|
|
Handle<FeedbackVector> feedback_vector(f->feedback_vector());
|
|
FeedbackVectorHelper helper(feedback_vector);
|
|
CHECK_EQ(7, helper.slot_count());
|
|
CHECK_SLOT_KIND(helper, 0, FeedbackVectorSlotKind::LOAD_GLOBAL_IC);
|
|
CHECK_SLOT_KIND(helper, 1, FeedbackVectorSlotKind::STORE_IC);
|
|
CHECK_SLOT_KIND(helper, 2, FeedbackVectorSlotKind::STORE_IC);
|
|
CHECK_SLOT_KIND(helper, 3, FeedbackVectorSlotKind::STORE_IC);
|
|
CHECK_SLOT_KIND(helper, 4, FeedbackVectorSlotKind::LOAD_IC);
|
|
CHECK_SLOT_KIND(helper, 5, FeedbackVectorSlotKind::LOAD_IC);
|
|
CHECK_SLOT_KIND(helper, 6, FeedbackVectorSlotKind::INTERPRETER_BINARYOP_IC);
|
|
}
|
|
}
|
|
|
|
|
|
TEST(VectorStoreICBasic) {
|
|
if (i::FLAG_always_opt) return;
|
|
|
|
CcTest::InitializeVM();
|
|
LocalContext context;
|
|
v8::HandleScope scope(context->GetIsolate());
|
|
|
|
CompileRun(
|
|
"function f(a) {"
|
|
" a.foo = 5;"
|
|
"}"
|
|
"var a = { foo: 3 };"
|
|
"f(a);"
|
|
"f(a);"
|
|
"f(a);");
|
|
Handle<JSFunction> f = GetFunction("f");
|
|
// There should be one IC slot.
|
|
Handle<FeedbackVector> feedback_vector(f->feedback_vector());
|
|
FeedbackVectorHelper helper(feedback_vector);
|
|
CHECK_EQ(1, helper.slot_count());
|
|
FeedbackVectorSlot slot(0);
|
|
StoreICNexus nexus(feedback_vector, slot);
|
|
CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
|
|
}
|
|
|
|
} // namespace
|
|
|