1 #include "FuzzerInternal.h"
2 #include "gtest/gtest.h"
5 using namespace fuzzer;
7 // For now, have LLVMFuzzerTestOneInput just to make it link.
8 // Later we may want to make unittests that actually call LLVMFuzzerTestOneInput.
9 extern "C" void LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
13 TEST(Fuzzer, CrossOver) {
14 FuzzerRandomLibc Rand(0);
15 MutationDispatcher MD(Rand);
16 Unit A({0, 1, 2}), B({5, 6, 7});
54 for (size_t Len = 1; Len < 8; Len++) {
55 std::set<Unit> FoundUnits, ExpectedUnitsWitThisLength;
56 for (int Iter = 0; Iter < 3000; Iter++) {
58 size_t NewSize = MD.CrossOver(A.data(), A.size(), B.data(), B.size(),
63 for (const Unit &U : Expected)
65 ExpectedUnitsWitThisLength.insert(U);
66 EXPECT_EQ(ExpectedUnitsWitThisLength, FoundUnits);
71 uint8_t A[] = {'a', 'b', 'c'};
72 fuzzer::Unit U(A, A + sizeof(A));
73 EXPECT_EQ("a9993e364706816aba3e25717850c26c9cd0d89d", fuzzer::Hash(U));
75 EXPECT_EQ("81fe8bfe87576c3ecb22426f8e57847382917acf", fuzzer::Hash(U));
78 typedef size_t (MutationDispatcher::*Mutator)(uint8_t *Data, size_t Size,
81 void TestEraseByte(Mutator M, int NumIter) {
82 uint8_t REM0[8] = {0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77};
83 uint8_t REM1[8] = {0x00, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77};
84 uint8_t REM2[8] = {0x00, 0x11, 0x33, 0x44, 0x55, 0x66, 0x77};
85 uint8_t REM3[8] = {0x00, 0x11, 0x22, 0x44, 0x55, 0x66, 0x77};
86 uint8_t REM4[8] = {0x00, 0x11, 0x22, 0x33, 0x55, 0x66, 0x77};
87 uint8_t REM5[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x66, 0x77};
88 uint8_t REM6[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x77};
89 uint8_t REM7[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66};
90 FuzzerRandomLibc Rand(0);
91 MutationDispatcher MD(Rand);
93 for (int i = 0; i < NumIter; i++) {
94 uint8_t T[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77};
95 size_t NewSize = (MD.*M)(T, sizeof(T), sizeof(T));
96 if (NewSize == 7 && !memcmp(REM0, T, 7)) FoundMask |= 1 << 0;
97 if (NewSize == 7 && !memcmp(REM1, T, 7)) FoundMask |= 1 << 1;
98 if (NewSize == 7 && !memcmp(REM2, T, 7)) FoundMask |= 1 << 2;
99 if (NewSize == 7 && !memcmp(REM3, T, 7)) FoundMask |= 1 << 3;
100 if (NewSize == 7 && !memcmp(REM4, T, 7)) FoundMask |= 1 << 4;
101 if (NewSize == 7 && !memcmp(REM5, T, 7)) FoundMask |= 1 << 5;
102 if (NewSize == 7 && !memcmp(REM6, T, 7)) FoundMask |= 1 << 6;
103 if (NewSize == 7 && !memcmp(REM7, T, 7)) FoundMask |= 1 << 7;
105 EXPECT_EQ(FoundMask, 255);
108 TEST(FuzzerMutate, EraseByte1) { TestEraseByte(&MutationDispatcher::Mutate_EraseByte, 100); }
109 TEST(FuzzerMutate, EraseByte2) { TestEraseByte(&MutationDispatcher::Mutate, 1000); }
111 void TestInsertByte(Mutator M, int NumIter) {
112 FuzzerRandomLibc Rand(0);
113 MutationDispatcher MD(Rand);
115 uint8_t INS0[8] = {0xF1, 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66};
116 uint8_t INS1[8] = {0x00, 0xF2, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66};
117 uint8_t INS2[8] = {0x00, 0x11, 0xF3, 0x22, 0x33, 0x44, 0x55, 0x66};
118 uint8_t INS3[8] = {0x00, 0x11, 0x22, 0xF4, 0x33, 0x44, 0x55, 0x66};
119 uint8_t INS4[8] = {0x00, 0x11, 0x22, 0x33, 0xF5, 0x44, 0x55, 0x66};
120 uint8_t INS5[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0xF6, 0x55, 0x66};
121 uint8_t INS6[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0xF7, 0x66};
122 uint8_t INS7[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0xF8};
123 for (int i = 0; i < NumIter; i++) {
124 uint8_t T[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66};
125 size_t NewSize = (MD.*M)(T, 7, 8);
126 if (NewSize == 8 && !memcmp(INS0, T, 8)) FoundMask |= 1 << 0;
127 if (NewSize == 8 && !memcmp(INS1, T, 8)) FoundMask |= 1 << 1;
128 if (NewSize == 8 && !memcmp(INS2, T, 8)) FoundMask |= 1 << 2;
129 if (NewSize == 8 && !memcmp(INS3, T, 8)) FoundMask |= 1 << 3;
130 if (NewSize == 8 && !memcmp(INS4, T, 8)) FoundMask |= 1 << 4;
131 if (NewSize == 8 && !memcmp(INS5, T, 8)) FoundMask |= 1 << 5;
132 if (NewSize == 8 && !memcmp(INS6, T, 8)) FoundMask |= 1 << 6;
133 if (NewSize == 8 && !memcmp(INS7, T, 8)) FoundMask |= 1 << 7;
135 EXPECT_EQ(FoundMask, 255);
138 TEST(FuzzerMutate, InsertByte1) { TestInsertByte(&MutationDispatcher::Mutate_InsertByte, 1 << 15); }
139 TEST(FuzzerMutate, InsertByte2) { TestInsertByte(&MutationDispatcher::Mutate, 1 << 17); }
141 void TestChangeByte(Mutator M, int NumIter) {
142 FuzzerRandomLibc Rand(0);
143 MutationDispatcher MD(Rand);
145 uint8_t CH0[8] = {0xF0, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77};
146 uint8_t CH1[8] = {0x00, 0xF1, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77};
147 uint8_t CH2[8] = {0x00, 0x11, 0xF2, 0x33, 0x44, 0x55, 0x66, 0x77};
148 uint8_t CH3[8] = {0x00, 0x11, 0x22, 0xF3, 0x44, 0x55, 0x66, 0x77};
149 uint8_t CH4[8] = {0x00, 0x11, 0x22, 0x33, 0xF4, 0x55, 0x66, 0x77};
150 uint8_t CH5[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0xF5, 0x66, 0x77};
151 uint8_t CH6[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0xF5, 0x77};
152 uint8_t CH7[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0xF7};
153 for (int i = 0; i < NumIter; i++) {
154 uint8_t T[9] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77};
155 size_t NewSize = (MD.*M)(T, 8, 9);
156 if (NewSize == 8 && !memcmp(CH0, T, 8)) FoundMask |= 1 << 0;
157 if (NewSize == 8 && !memcmp(CH1, T, 8)) FoundMask |= 1 << 1;
158 if (NewSize == 8 && !memcmp(CH2, T, 8)) FoundMask |= 1 << 2;
159 if (NewSize == 8 && !memcmp(CH3, T, 8)) FoundMask |= 1 << 3;
160 if (NewSize == 8 && !memcmp(CH4, T, 8)) FoundMask |= 1 << 4;
161 if (NewSize == 8 && !memcmp(CH5, T, 8)) FoundMask |= 1 << 5;
162 if (NewSize == 8 && !memcmp(CH6, T, 8)) FoundMask |= 1 << 6;
163 if (NewSize == 8 && !memcmp(CH7, T, 8)) FoundMask |= 1 << 7;
165 EXPECT_EQ(FoundMask, 255);
168 TEST(FuzzerMutate, ChangeByte1) { TestChangeByte(&MutationDispatcher::Mutate_ChangeByte, 1 << 15); }
169 TEST(FuzzerMutate, ChangeByte2) { TestChangeByte(&MutationDispatcher::Mutate, 1 << 17); }
171 void TestChangeBit(Mutator M, int NumIter) {
172 FuzzerRandomLibc Rand(0);
173 MutationDispatcher MD(Rand);
175 uint8_t CH0[8] = {0x01, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77};
176 uint8_t CH1[8] = {0x00, 0x13, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77};
177 uint8_t CH2[8] = {0x00, 0x11, 0x02, 0x33, 0x44, 0x55, 0x66, 0x77};
178 uint8_t CH3[8] = {0x00, 0x11, 0x22, 0x37, 0x44, 0x55, 0x66, 0x77};
179 uint8_t CH4[8] = {0x00, 0x11, 0x22, 0x33, 0x54, 0x55, 0x66, 0x77};
180 uint8_t CH5[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x54, 0x66, 0x77};
181 uint8_t CH6[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x76, 0x77};
182 uint8_t CH7[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0xF7};
183 for (int i = 0; i < NumIter; i++) {
184 uint8_t T[9] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77};
185 size_t NewSize = (MD.*M)(T, 8, 9);
186 if (NewSize == 8 && !memcmp(CH0, T, 8)) FoundMask |= 1 << 0;
187 if (NewSize == 8 && !memcmp(CH1, T, 8)) FoundMask |= 1 << 1;
188 if (NewSize == 8 && !memcmp(CH2, T, 8)) FoundMask |= 1 << 2;
189 if (NewSize == 8 && !memcmp(CH3, T, 8)) FoundMask |= 1 << 3;
190 if (NewSize == 8 && !memcmp(CH4, T, 8)) FoundMask |= 1 << 4;
191 if (NewSize == 8 && !memcmp(CH5, T, 8)) FoundMask |= 1 << 5;
192 if (NewSize == 8 && !memcmp(CH6, T, 8)) FoundMask |= 1 << 6;
193 if (NewSize == 8 && !memcmp(CH7, T, 8)) FoundMask |= 1 << 7;
195 EXPECT_EQ(FoundMask, 255);
198 TEST(FuzzerMutate, ChangeBit1) { TestChangeBit(&MutationDispatcher::Mutate_ChangeBit, 1 << 16); }
199 TEST(FuzzerMutate, ChangeBit2) { TestChangeBit(&MutationDispatcher::Mutate, 1 << 18); }
201 void TestShuffleBytes(Mutator M, int NumIter) {
202 FuzzerRandomLibc Rand(0);
203 MutationDispatcher MD(Rand);
205 uint8_t CH0[7] = {0x00, 0x22, 0x11, 0x33, 0x44, 0x55, 0x66};
206 uint8_t CH1[7] = {0x11, 0x00, 0x33, 0x22, 0x44, 0x55, 0x66};
207 uint8_t CH2[7] = {0x00, 0x33, 0x11, 0x22, 0x44, 0x55, 0x66};
208 uint8_t CH3[7] = {0x00, 0x11, 0x22, 0x44, 0x55, 0x66, 0x33};
209 uint8_t CH4[7] = {0x00, 0x11, 0x22, 0x33, 0x55, 0x44, 0x66};
210 for (int i = 0; i < NumIter; i++) {
211 uint8_t T[7] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66};
212 size_t NewSize = (MD.*M)(T, 7, 7);
213 if (NewSize == 7 && !memcmp(CH0, T, 7)) FoundMask |= 1 << 0;
214 if (NewSize == 7 && !memcmp(CH1, T, 7)) FoundMask |= 1 << 1;
215 if (NewSize == 7 && !memcmp(CH2, T, 7)) FoundMask |= 1 << 2;
216 if (NewSize == 7 && !memcmp(CH3, T, 7)) FoundMask |= 1 << 3;
217 if (NewSize == 7 && !memcmp(CH4, T, 7)) FoundMask |= 1 << 4;
219 EXPECT_EQ(FoundMask, 31);
222 TEST(FuzzerMutate, ShuffleBytes1) { TestShuffleBytes(&MutationDispatcher::Mutate_ShuffleBytes, 1 << 15); }
223 TEST(FuzzerMutate, ShuffleBytes2) { TestShuffleBytes(&MutationDispatcher::Mutate, 1 << 16); }
225 TEST(FuzzerDictionary, ParseOneDictionaryEntry) {
227 EXPECT_FALSE(ParseOneDictionaryEntry("", &U));
228 EXPECT_FALSE(ParseOneDictionaryEntry(" ", &U));
229 EXPECT_FALSE(ParseOneDictionaryEntry("\t ", &U));
230 EXPECT_FALSE(ParseOneDictionaryEntry(" \" ", &U));
231 EXPECT_FALSE(ParseOneDictionaryEntry(" zz\" ", &U));
232 EXPECT_FALSE(ParseOneDictionaryEntry(" \"zz ", &U));
233 EXPECT_FALSE(ParseOneDictionaryEntry(" \"\" ", &U));
234 EXPECT_TRUE(ParseOneDictionaryEntry("\"a\"", &U));
235 EXPECT_EQ(U, Unit({'a'}));
236 EXPECT_TRUE(ParseOneDictionaryEntry("\"abc\"", &U));
237 EXPECT_EQ(U, Unit({'a', 'b', 'c'}));
238 EXPECT_TRUE(ParseOneDictionaryEntry("abc=\"abc\"", &U));
239 EXPECT_EQ(U, Unit({'a', 'b', 'c'}));
240 EXPECT_FALSE(ParseOneDictionaryEntry("\"\\\"", &U));
241 EXPECT_TRUE(ParseOneDictionaryEntry("\"\\\\\"", &U));
242 EXPECT_EQ(U, Unit({'\\'}));
243 EXPECT_TRUE(ParseOneDictionaryEntry("\"\\xAB\"", &U));
244 EXPECT_EQ(U, Unit({0xAB}));
245 EXPECT_TRUE(ParseOneDictionaryEntry("\"\\xABz\\xDE\"", &U));
246 EXPECT_EQ(U, Unit({0xAB, 'z', 0xDE}));
247 EXPECT_TRUE(ParseOneDictionaryEntry("\"#\"", &U));
248 EXPECT_EQ(U, Unit({'#'}));
249 EXPECT_TRUE(ParseOneDictionaryEntry("\"\\\"\"", &U));
250 EXPECT_EQ(U, Unit({'"'}));
253 TEST(FuzzerDictionary, ParseDictionaryFile) {
254 std::vector<Unit> Units;
255 EXPECT_FALSE(ParseDictionaryFile("zzz\n", &Units));
256 EXPECT_FALSE(ParseDictionaryFile("", &Units));
257 EXPECT_TRUE(ParseDictionaryFile("\n", &Units));
258 EXPECT_EQ(Units.size(), 0U);
259 EXPECT_TRUE(ParseDictionaryFile("#zzzz a b c d\n", &Units));
260 EXPECT_EQ(Units.size(), 0U);
261 EXPECT_TRUE(ParseDictionaryFile(" #zzzz\n", &Units));
262 EXPECT_EQ(Units.size(), 0U);
263 EXPECT_TRUE(ParseDictionaryFile(" #zzzz\n", &Units));
264 EXPECT_EQ(Units.size(), 0U);
265 EXPECT_TRUE(ParseDictionaryFile(" #zzzz\naaa=\"aa\"", &Units));
266 EXPECT_EQ(Units, std::vector<Unit>({Unit({'a', 'a'})}));
268 ParseDictionaryFile(" #zzzz\naaa=\"aa\"\n\nabc=\"abc\"", &Units));
270 std::vector<Unit>({Unit({'a', 'a'}), Unit({'a', 'b', 'c'})}));