Mathieu Chartier | 8892c6b | 2018-01-09 15:10:17 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include <vector> |
| 18 | #include <sys/mman.h> |
| 19 | |
| 20 | #include "base/logging.h" |
| 21 | #include "dex/compact_dex_debug_info.h" |
| 22 | #include "gtest/gtest.h" |
| 23 | #include "mem_map.h" |
| 24 | |
| 25 | namespace art { |
| 26 | |
| 27 | TEST(CompactDexDebugInfoTest, TestBuildAndAccess) { |
| 28 | MemMap::Init(); |
| 29 | |
| 30 | const size_t kDebugInfoMinOffset = 1234567; |
| 31 | std::vector<uint32_t> offsets = { |
| 32 | 0, 17, 2, 3, 11, 0, 0, 0, 0, 1, 0, 1552, 100, 122, 44, 1234567, 0, 0, |
| 33 | std::numeric_limits<uint32_t>::max() - kDebugInfoMinOffset, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 34 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 12, |
| 35 | }; |
| 36 | // Add some large offset since the debug info section will never be that close to the beginning |
| 37 | // of the file. |
| 38 | for (uint32_t& offset : offsets) { |
| 39 | if (offset != 0u) { |
| 40 | offset += kDebugInfoMinOffset; |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | std::vector<uint8_t> data; |
| 45 | uint32_t base_offset = 0; |
| 46 | uint32_t table_offset = 0; |
| 47 | CompactDexDebugInfoOffsetTable::Build(offsets, |
| 48 | /*out*/ &data, |
| 49 | /*out*/ &base_offset, |
| 50 | /*out*/ &table_offset); |
| 51 | EXPECT_GE(base_offset, kDebugInfoMinOffset); |
| 52 | EXPECT_LT(table_offset, data.size()); |
| 53 | ASSERT_GT(data.size(), 0u); |
| 54 | const size_t before_size = offsets.size() * sizeof(offsets.front()); |
| 55 | EXPECT_LT(data.size(), before_size); |
| 56 | |
| 57 | // Note that the accessor requires the data to be aligned. Use memmap to accomplish this. |
| 58 | std::string error_msg; |
| 59 | // Leave some extra room since we don't copy the table at the start (for testing). |
| 60 | constexpr size_t kExtraOffset = 4 * 128; |
| 61 | std::unique_ptr<MemMap> fake_dex(MemMap::MapAnonymous("fake dex", |
| 62 | nullptr, |
| 63 | data.size() + kExtraOffset, |
| 64 | PROT_READ | PROT_WRITE, |
| 65 | /*low_4gb*/ false, |
| 66 | /*reuse*/ false, |
| 67 | &error_msg)); |
| 68 | ASSERT_TRUE(fake_dex != nullptr) << error_msg; |
| 69 | std::copy(data.begin(), data.end(), fake_dex->Begin() + kExtraOffset); |
| 70 | |
| 71 | CompactDexDebugInfoOffsetTable::Accessor accessor(fake_dex->Begin() + kExtraOffset, |
| 72 | base_offset, |
| 73 | table_offset); |
| 74 | for (size_t i = 0; i < offsets.size(); ++i) { |
| 75 | EXPECT_EQ(offsets[i], accessor.GetDebugInfoOffset(i)); |
| 76 | } |
| 77 | |
| 78 | // Sort to produce a try and produce a smaller table. This happens because the leb diff is smaller |
| 79 | // for sorted increasing order. |
| 80 | std::sort(offsets.begin(), offsets.end()); |
| 81 | std::vector<uint8_t> sorted_data; |
| 82 | CompactDexDebugInfoOffsetTable::Build(offsets, |
| 83 | /*out*/ &sorted_data, |
| 84 | /*out*/ &base_offset, |
| 85 | /*out*/ &table_offset); |
| 86 | EXPECT_LT(sorted_data.size(), data.size()); |
| 87 | { |
| 88 | ScopedLogSeverity sls(LogSeverity::INFO); |
| 89 | LOG(INFO) << "raw size " << before_size |
| 90 | << " table size " << data.size() |
| 91 | << " sorted table size " << sorted_data.size(); |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | } // namespace art |