linker_sleb128_test.cpp revision fa4aeed2c60fb97a06e2550481b9ef4d0e100b7e 
1/*
2 * Copyright (C) 2016 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 <stdlib.h>
18#include <string.h>
19#include <sys/mman.h>
20
21#include <gtest/gtest.h>
22
23#include "../linker_sleb128.h"
24
25TEST(linker_sleb128, smoke) {
26  std::vector<uint8_t> encoding;
27  // 624485
28  encoding.push_back(0xe5);
29  encoding.push_back(0x8e);
30  encoding.push_back(0x26);
31  // 0
32  encoding.push_back(0x00);
33  // 1
34  encoding.push_back(0x01);
35  // 63
36  encoding.push_back(0x3f);
37  // 64
38  encoding.push_back(0xc0);
39  encoding.push_back(0x00);
40  // -1
41  encoding.push_back(0x7f);
42  // -624485
43  encoding.push_back(0x9b);
44  encoding.push_back(0xf1);
45  encoding.push_back(0x59);
46  // 2147483647
47  encoding.push_back(0xff);
48  encoding.push_back(0xff);
49  encoding.push_back(0xff);
50  encoding.push_back(0xff);
51  encoding.push_back(0x07);
52  // -2147483648
53  encoding.push_back(0x80);
54  encoding.push_back(0x80);
55  encoding.push_back(0x80);
56  encoding.push_back(0x80);
57  encoding.push_back(0x78);
58#if defined(__LP64__)
59  // 9223372036854775807
60  encoding.push_back(0xff);
61  encoding.push_back(0xff);
62  encoding.push_back(0xff);
63  encoding.push_back(0xff);
64  encoding.push_back(0xff);
65  encoding.push_back(0xff);
66  encoding.push_back(0xff);
67  encoding.push_back(0xff);
68  encoding.push_back(0xff);
69  encoding.push_back(0x00);
70  // -9223372036854775808
71  encoding.push_back(0x80);
72  encoding.push_back(0x80);
73  encoding.push_back(0x80);
74  encoding.push_back(0x80);
75  encoding.push_back(0x80);
76  encoding.push_back(0x80);
77  encoding.push_back(0x80);
78  encoding.push_back(0x80);
79  encoding.push_back(0x80);
80  encoding.push_back(0x7f);
81#endif
82  sleb128_decoder decoder(&encoding[0], encoding.size());
83
84  EXPECT_EQ(624485U, decoder.pop_front());
85
86  EXPECT_EQ(0U, decoder.pop_front());
87  EXPECT_EQ(1U, decoder.pop_front());
88  EXPECT_EQ(63U, decoder.pop_front());
89  EXPECT_EQ(64U, decoder.pop_front());
90  EXPECT_EQ(static_cast<size_t>(-1), decoder.pop_front());
91  EXPECT_EQ(static_cast<size_t>(-624485), decoder.pop_front());
92  EXPECT_EQ(2147483647U, decoder.pop_front());
93  EXPECT_EQ(static_cast<size_t>(-2147483648), decoder.pop_front());
94#if defined(__LP64__)
95  EXPECT_EQ(9223372036854775807ULL, decoder.pop_front());
96  EXPECT_EQ(static_cast<uint64_t>(-9223372036854775807LL - 1), decoder.pop_front());
97#endif
98}
99