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// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/v8.h"
#include "src/list.h"
#include "src/objects.h"
#include "test/cctest/cctest.h"
namespace v8 {
namespace internal {
namespace {
static Handle<Code> GetDummyCode(Isolate* isolate) {
CodeDesc desc = {nullptr, // buffer
0, // buffer_size
0, // instr_size
0, // reloc_size
0, // constant_pool_size
nullptr, // unwinding_info
0, // unwinding_info_size
nullptr}; // origin
Code::Flags flags =
Code::ComputeFlags(Code::LOAD_IC, kNoExtraICState, kCacheOnReceiver);
Handle<Code> self_ref;
return isolate->factory()->NewCode(desc, flags, self_ref);
}
} // namespace
TEST(CodeCache) {
CcTest::InitializeVM();
Isolate* isolate = CcTest::i_isolate();
Factory* factory = isolate->factory();
HandleScope handle_scope(isolate);
Handle<Map> map =
factory->NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize, FAST_ELEMENTS);
// This number should be large enough to cause the code cache to use its
// hash table storage format.
static const int kEntries = 150;
// Prepare name/code pairs.
List<Handle<Name>> names(kEntries);
List<Handle<Code>> codes(kEntries);
for (int i = 0; i < kEntries; i++) {
names.Add(isolate->factory()->NewSymbol());
codes.Add(GetDummyCode(isolate));
}
Handle<Name> bad_name = isolate->factory()->NewSymbol();
Code::Flags bad_flags =
Code::ComputeFlags(Code::LOAD_IC, kNoExtraICState, kCacheOnPrototype);
DCHECK(bad_flags != codes[0]->flags());
// Cache name/code pairs.
for (int i = 0; i < kEntries; i++) {
Handle<Name> name = names.at(i);
Handle<Code> code = codes.at(i);
Map::UpdateCodeCache(map, name, code);
CHECK_EQ(*code, map->LookupInCodeCache(*name, code->flags()));
CHECK_NULL(map->LookupInCodeCache(*name, bad_flags));
}
CHECK_NULL(map->LookupInCodeCache(*bad_name, bad_flags));
// Check that lookup works not only right after storing.
for (int i = 0; i < kEntries; i++) {
Handle<Name> name = names.at(i);
Handle<Code> code = codes.at(i);
CHECK_EQ(*code, map->LookupInCodeCache(*name, code->flags()));
}
}
} // namespace internal
} // namespace v8
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