Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 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 |