1 // Copyright 2016 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "src/v8.h" 6 7 #include "src/list.h" 8 #include "src/objects.h" 9 #include "test/cctest/cctest.h" 10 11 namespace v8 { 12 namespace internal { 13 14 namespace { 15 16 static Handle<Code> GetDummyCode(Isolate* isolate) { 17 CodeDesc desc = {nullptr, // buffer 18 0, // buffer_size 19 0, // instr_size 20 0, // reloc_size 21 0, // constant_pool_size 22 nullptr, // unwinding_info 23 0, // unwinding_info_size 24 nullptr}; // origin 25 Code::Flags flags = 26 Code::ComputeFlags(Code::LOAD_IC, kNoExtraICState, kCacheOnReceiver); 27 Handle<Code> self_ref; 28 return isolate->factory()->NewCode(desc, flags, self_ref); 29 } 30 31 } // namespace 32 33 TEST(CodeCache) { 34 CcTest::InitializeVM(); 35 Isolate* isolate = CcTest::i_isolate(); 36 Factory* factory = isolate->factory(); 37 HandleScope handle_scope(isolate); 38 39 Handle<Map> map = 40 factory->NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize, FAST_ELEMENTS); 41 42 // This number should be large enough to cause the code cache to use its 43 // hash table storage format. 44 static const int kEntries = 150; 45 46 // Prepare name/code pairs. 47 List<Handle<Name>> names(kEntries); 48 List<Handle<Code>> codes(kEntries); 49 for (int i = 0; i < kEntries; i++) { 50 names.Add(isolate->factory()->NewSymbol()); 51 codes.Add(GetDummyCode(isolate)); 52 } 53 Handle<Name> bad_name = isolate->factory()->NewSymbol(); 54 Code::Flags bad_flags = 55 Code::ComputeFlags(Code::LOAD_IC, kNoExtraICState, kCacheOnPrototype); 56 DCHECK(bad_flags != codes[0]->flags()); 57 58 // Cache name/code pairs. 59 for (int i = 0; i < kEntries; i++) { 60 Handle<Name> name = names.at(i); 61 Handle<Code> code = codes.at(i); 62 Map::UpdateCodeCache(map, name, code); 63 CHECK_EQ(*code, map->LookupInCodeCache(*name, code->flags())); 64 CHECK_NULL(map->LookupInCodeCache(*name, bad_flags)); 65 } 66 CHECK_NULL(map->LookupInCodeCache(*bad_name, bad_flags)); 67 68 // Check that lookup works not only right after storing. 69 for (int i = 0; i < kEntries; i++) { 70 Handle<Name> name = names.at(i); 71 Handle<Code> code = codes.at(i); 72 CHECK_EQ(*code, map->LookupInCodeCache(*name, code->flags())); 73 } 74 } 75 76 } // namespace internal 77 } // namespace v8 78
