1 /* 2 * Copyright (C) 2017 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 "index_bss_mapping_encoder.h" 18 19 #include "base/enums.h" 20 #include "gtest/gtest.h" 21 22 namespace art { 23 namespace linker { 24 25 TEST(IndexBssMappingEncoder, TryMerge16BitIndex) { 26 for (PointerSize pointer_size : {PointerSize::k32, PointerSize::k64}) { 27 size_t raw_pointer_size = static_cast<size_t>(pointer_size); 28 IndexBssMappingEncoder encoder(/* number_of_indexes */ 0x10000, raw_pointer_size); 29 encoder.Reset(1u, 0u); 30 ASSERT_FALSE(encoder.TryMerge(5u, raw_pointer_size + 1)); // Wrong bss_offset difference. 31 ASSERT_FALSE(encoder.TryMerge(18u, raw_pointer_size)); // Index out of range. 32 ASSERT_TRUE(encoder.TryMerge(5u, raw_pointer_size)); 33 ASSERT_EQ(0u, encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 1u, raw_pointer_size)); 34 ASSERT_EQ(raw_pointer_size, 35 encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 5u, raw_pointer_size)); 36 ASSERT_EQ(IndexBssMappingLookup::npos, 37 encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 17u, raw_pointer_size)); 38 ASSERT_FALSE(encoder.TryMerge(17u, 2 * raw_pointer_size + 1)); // Wrong bss_offset difference. 39 ASSERT_FALSE(encoder.TryMerge(18u, 2 * raw_pointer_size)); // Index out of range. 40 ASSERT_TRUE(encoder.TryMerge(17u, 2 * raw_pointer_size)); 41 ASSERT_EQ(0u, encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 1u, raw_pointer_size)); 42 ASSERT_EQ(raw_pointer_size, 43 encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 5u, raw_pointer_size)); 44 ASSERT_EQ(2 * raw_pointer_size, 45 encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 17u, raw_pointer_size)); 46 ASSERT_EQ(0x00110000u | 17u, encoder.GetEntry().index_and_mask); 47 ASSERT_FALSE(encoder.TryMerge(18u, 3 * raw_pointer_size)); // Index out of range. 48 } 49 } 50 51 TEST(IndexBssMappingEncoder, TryMerge8BitIndex) { 52 for (PointerSize pointer_size : {PointerSize::k32, PointerSize::k64}) { 53 size_t raw_pointer_size = static_cast<size_t>(pointer_size); 54 IndexBssMappingEncoder encoder(/* number_of_indexes */ 0x100, raw_pointer_size); 55 encoder.Reset(1u, 0u); 56 ASSERT_FALSE(encoder.TryMerge(5u, raw_pointer_size + 1)); // Wrong bss_offset difference. 57 ASSERT_FALSE(encoder.TryMerge(26u, raw_pointer_size)); // Index out of range. 58 ASSERT_TRUE(encoder.TryMerge(5u, raw_pointer_size)); 59 ASSERT_EQ(0u, encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 1u, raw_pointer_size)); 60 ASSERT_EQ(raw_pointer_size, 61 encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 5u, raw_pointer_size)); 62 ASSERT_EQ(IndexBssMappingLookup::npos, 63 encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 17u, raw_pointer_size)); 64 ASSERT_FALSE(encoder.TryMerge(25u, 2 * raw_pointer_size + 1)); // Wrong bss_offset difference. 65 ASSERT_FALSE(encoder.TryMerge(26u, 2 * raw_pointer_size)); // Index out of range. 66 ASSERT_TRUE(encoder.TryMerge(25u, 2 * raw_pointer_size)); 67 ASSERT_EQ(0u, encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 1u, raw_pointer_size)); 68 ASSERT_EQ(raw_pointer_size, 69 encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 5u, raw_pointer_size)); 70 ASSERT_EQ(2 * raw_pointer_size, 71 encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 25u, raw_pointer_size)); 72 ASSERT_EQ(0x00001100u | 25u, encoder.GetEntry().index_and_mask); 73 ASSERT_FALSE(encoder.TryMerge(26u, 3 * raw_pointer_size)); // Index out of range. 74 } 75 } 76 77 TEST(IndexBssMappingEncoder, TryMerge20BitIndex) { 78 for (PointerSize pointer_size : {PointerSize::k32, PointerSize::k64}) { 79 size_t raw_pointer_size = static_cast<size_t>(pointer_size); 80 IndexBssMappingEncoder encoder(/* number_of_indexes */ 0x100000, raw_pointer_size); 81 encoder.Reset(1u, 0u); 82 ASSERT_FALSE(encoder.TryMerge(5u, raw_pointer_size + 1)); // Wrong bss_offset difference. 83 ASSERT_FALSE(encoder.TryMerge(14u, raw_pointer_size)); // Index out of range. 84 ASSERT_TRUE(encoder.TryMerge(5u, raw_pointer_size)); 85 ASSERT_EQ(0u, encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 1u, raw_pointer_size)); 86 ASSERT_EQ(raw_pointer_size, 87 encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 5u, raw_pointer_size)); 88 ASSERT_EQ(IndexBssMappingLookup::npos, 89 encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 17u, raw_pointer_size)); 90 ASSERT_FALSE(encoder.TryMerge(13u, 2 * raw_pointer_size + 1)); // Wrong bss_offset difference. 91 ASSERT_FALSE(encoder.TryMerge(14u, 2 * raw_pointer_size)); // Index out of range. 92 ASSERT_TRUE(encoder.TryMerge(13u, 2 * raw_pointer_size)); 93 ASSERT_EQ(0u, encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 1u, raw_pointer_size)); 94 ASSERT_EQ(raw_pointer_size, 95 encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 5u, raw_pointer_size)); 96 ASSERT_EQ(2 * raw_pointer_size, 97 encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 13u, raw_pointer_size)); 98 ASSERT_EQ(0x01100000u | 13u, encoder.GetEntry().index_and_mask); 99 ASSERT_FALSE(encoder.TryMerge(14u, 3 * raw_pointer_size)); // Index out of range. 100 } 101 } 102 103 } // namespace linker 104 } // namespace art 105
