1 // Copyright 2014, VIXL authors
2 // All rights reserved.
3 //
4 // Redistribution and use in source and binary forms, with or without
5 // modification, are permitted provided that the following conditions are met:
6 //
7 // * Redistributions of source code must retain the above copyright notice,
8 // this list of conditions and the following disclaimer.
9 // * Redistributions in binary form must reproduce the above copyright notice,
10 // this list of conditions and the following disclaimer in the documentation
11 // and/or other materials provided with the distribution.
12 // * Neither the name of ARM Limited nor the names of its contributors may be
13 // used to endorse or promote products derived from this software without
14 // specific prior written permission.
15 //
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
17 // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
20 // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
23 // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26
27 #include <cstdlib>
28
29 #include "test-runner.h"
30
31 #include "aarch64/decoder-aarch64.h"
32 #include "aarch64/disasm-aarch64.h"
33
34 #define TEST(name) TEST_(AARCH64_FUZZ_##name)
35
36
37 namespace vixl {
38 namespace aarch64 {
39
40
TEST(decoder)41 TEST(decoder) {
42 // Feed noise into the decoder to check that it doesn't crash.
43 // 43 million = ~1% of the instruction space.
44 static const int instruction_count = 43 * 1024 * 1024;
45
46 uint16_t seed[3] = {1, 2, 3};
47 seed48(seed);
48
49 Decoder decoder;
50 Instruction buffer[kInstructionSize];
51
52 for (int i = 0; i < instruction_count; i++) {
53 uint32_t instr = static_cast<uint32_t>(mrand48());
54 buffer->SetInstructionBits(instr);
55 decoder.Decode(buffer);
56 }
57 }
58
TEST(disasm)59 TEST(disasm) {
60 // Feed noise into the disassembler to check that it doesn't crash.
61 // 9 million = ~0.2% of the instruction space.
62 static const int instruction_count = 9 * 1024 * 1024;
63
64 uint16_t seed[3] = {42, 43, 44};
65 seed48(seed);
66
67 Decoder decoder;
68 Disassembler disasm;
69 Instruction buffer[kInstructionSize];
70
71 decoder.AppendVisitor(&disasm);
72 for (int i = 0; i < instruction_count; i++) {
73 uint32_t instr = static_cast<uint32_t>(mrand48());
74 buffer->SetInstructionBits(instr);
75 decoder.Decode(buffer);
76 }
77 }
78
79 #if 0
80 // These tests are commented out as they take a long time to run, causing the
81 // test script to timeout. After enabling them, they are best run manually:
82 //
83 // test-runner AARCH64_FUZZ_decoder_pedantic
84 // test-runner AARCH64_FUZZ_disasm_pedantic
85 //
86
87 TEST(decoder_pedantic) {
88 // Test the entire instruction space.
89 Decoder decoder;
90 Instruction buffer[kInstructionSize];
91
92 for (uint64_t i = 0; i < (UINT64_C(1) << 32); i++) {
93 if ((i & 0xffffff) == 0) {
94 fprintf(stderr, "0x%08" PRIx32 "\n", static_cast<uint32_t>(i));
95 }
96 buffer->SetInstructionBits(static_cast<uint32_t>(i));
97 decoder.Decode(buffer);
98 }
99 }
100
101 TEST(disasm_pedantic) {
102 // Test the entire instruction space. Warning: takes about 30 minutes on a
103 // high-end CPU.
104 Decoder decoder;
105 PrintDisassembler disasm(stdout);
106 Instruction buffer[kInstructionSize];
107
108 decoder.AppendVisitor(&disasm);
109 for (uint64_t i = 0; i < (UINT64_C(1) << 32); i++) {
110 if ((i & 0xffff) == 0) {
111 fprintf(stderr, "0x%08" PRIx32 "\n", static_cast<uint32_t>(i));
112 }
113 buffer->SetInstructionBits(static_cast<uint32_t>(i));
114 decoder.Decode(buffer);
115 }
116 }
117 #endif
118
119 } // namespace aarch64
120 } // namespace vixl
121