// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
// Avoid ODR violations (LibFuzzer is built without ASan and this test is built
// with ASan) involving C++ standard library types when using libcxx.
#define _LIBCPP_HAS_NO_ASAN
#include "FuzzerInternal.h"
#include "gtest/gtest.h"
#include <memory>
#include <set>
using namespace fuzzer;
// For now, have LLVMFuzzerTestOneInput just to make it link.
// Later we may want to make unittests that actually call LLVMFuzzerTestOneInput.
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
abort();
}
TEST(Fuzzer, CrossOver) {
std::unique_ptr<ExternalFunctions> t(new ExternalFunctions());
fuzzer::EF = t.get();
Random Rand(0);
MutationDispatcher MD(Rand, {});
Unit A({0, 1, 2}), B({5, 6, 7});
Unit C;
Unit Expected[] = {
{ 0 },
{ 0, 1 },
{ 0, 5 },
{ 0, 1, 2 },
{ 0, 1, 5 },
{ 0, 5, 1 },
{ 0, 5, 6 },
{ 0, 1, 2, 5 },
{ 0, 1, 5, 2 },
{ 0, 1, 5, 6 },
{ 0, 5, 1, 2 },
{ 0, 5, 1, 6 },
{ 0, 5, 6, 1 },
{ 0, 5, 6, 7 },
{ 0, 1, 2, 5, 6 },
{ 0, 1, 5, 2, 6 },
{ 0, 1, 5, 6, 2 },
{ 0, 1, 5, 6, 7 },
{ 0, 5, 1, 2, 6 },
{ 0, 5, 1, 6, 2 },
{ 0, 5, 1, 6, 7 },
{ 0, 5, 6, 1, 2 },
{ 0, 5, 6, 1, 7 },
{ 0, 5, 6, 7, 1 },
{ 0, 1, 2, 5, 6, 7 },
{ 0, 1, 5, 2, 6, 7 },
{ 0, 1, 5, 6, 2, 7 },
{ 0, 1, 5, 6, 7, 2 },
{ 0, 5, 1, 2, 6, 7 },
{ 0, 5, 1, 6, 2, 7 },
{ 0, 5, 1, 6, 7, 2 },
{ 0, 5, 6, 1, 2, 7 },
{ 0, 5, 6, 1, 7, 2 },
{ 0, 5, 6, 7, 1, 2 }
};
for (size_t Len = 1; Len < 8; Len++) {
std::set<Unit> FoundUnits, ExpectedUnitsWitThisLength;
for (int Iter = 0; Iter < 3000; Iter++) {
C.resize(Len);
size_t NewSize = MD.CrossOver(A.data(), A.size(), B.data(), B.size(),
C.data(), C.size());
C.resize(NewSize);
FoundUnits.insert(C);
}
for (const Unit &U : Expected)
if (U.size() <= Len)
ExpectedUnitsWitThisLength.insert(U);
EXPECT_EQ(ExpectedUnitsWitThisLength, FoundUnits);
}
}
TEST(Fuzzer, Hash) {
uint8_t A[] = {'a', 'b', 'c'};
fuzzer::Unit U(A, A + sizeof(A));
EXPECT_EQ("a9993e364706816aba3e25717850c26c9cd0d89d", fuzzer::Hash(U));
U.push_back('d');
EXPECT_EQ("81fe8bfe87576c3ecb22426f8e57847382917acf", fuzzer::Hash(U));
}
typedef size_t (MutationDispatcher::*Mutator)(uint8_t *Data, size_t Size,
size_t MaxSize);
void TestEraseByte(Mutator M, int NumIter) {
std::unique_ptr<ExternalFunctions> t(new ExternalFunctions());
fuzzer::EF = t.get();
uint8_t REM0[8] = {0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77};
uint8_t REM1[8] = {0x00, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77};
uint8_t REM2[8] = {0x00, 0x11, 0x33, 0x44, 0x55, 0x66, 0x77};
uint8_t REM3[8] = {0x00, 0x11, 0x22, 0x44, 0x55, 0x66, 0x77};
uint8_t REM4[8] = {0x00, 0x11, 0x22, 0x33, 0x55, 0x66, 0x77};
uint8_t REM5[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x66, 0x77};
uint8_t REM6[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x77};
uint8_t REM7[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66};
Random Rand(0);
MutationDispatcher MD(Rand, {});
int FoundMask = 0;
for (int i = 0; i < NumIter; i++) {
uint8_t T[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77};
size_t NewSize = (MD.*M)(T, sizeof(T), sizeof(T));
if (NewSize == 7 && !memcmp(REM0, T, 7)) FoundMask |= 1 << 0;
if (NewSize == 7 && !memcmp(REM1, T, 7)) FoundMask |= 1 << 1;
if (NewSize == 7 && !memcmp(REM2, T, 7)) FoundMask |= 1 << 2;
if (NewSize == 7 && !memcmp(REM3, T, 7)) FoundMask |= 1 << 3;
if (NewSize == 7 && !memcmp(REM4, T, 7)) FoundMask |= 1 << 4;
if (NewSize == 7 && !memcmp(REM5, T, 7)) FoundMask |= 1 << 5;
if (NewSize == 7 && !memcmp(REM6, T, 7)) FoundMask |= 1 << 6;
if (NewSize == 7 && !memcmp(REM7, T, 7)) FoundMask |= 1 << 7;
}
EXPECT_EQ(FoundMask, 255);
}
TEST(FuzzerMutate, EraseByte1) {
TestEraseByte(&MutationDispatcher::Mutate_EraseByte, 100);
}
TEST(FuzzerMutate, EraseByte2) {
TestEraseByte(&MutationDispatcher::Mutate, 1000);
}
void TestInsertByte(Mutator M, int NumIter) {
std::unique_ptr<ExternalFunctions> t(new ExternalFunctions());
fuzzer::EF = t.get();
Random Rand(0);
MutationDispatcher MD(Rand, {});
int FoundMask = 0;
uint8_t INS0[8] = {0xF1, 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66};
uint8_t INS1[8] = {0x00, 0xF2, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66};
uint8_t INS2[8] = {0x00, 0x11, 0xF3, 0x22, 0x33, 0x44, 0x55, 0x66};
uint8_t INS3[8] = {0x00, 0x11, 0x22, 0xF4, 0x33, 0x44, 0x55, 0x66};
uint8_t INS4[8] = {0x00, 0x11, 0x22, 0x33, 0xF5, 0x44, 0x55, 0x66};
uint8_t INS5[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0xF6, 0x55, 0x66};
uint8_t INS6[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0xF7, 0x66};
uint8_t INS7[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0xF8};
for (int i = 0; i < NumIter; i++) {
uint8_t T[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66};
size_t NewSize = (MD.*M)(T, 7, 8);
if (NewSize == 8 && !memcmp(INS0, T, 8)) FoundMask |= 1 << 0;
if (NewSize == 8 && !memcmp(INS1, T, 8)) FoundMask |= 1 << 1;
if (NewSize == 8 && !memcmp(INS2, T, 8)) FoundMask |= 1 << 2;
if (NewSize == 8 && !memcmp(INS3, T, 8)) FoundMask |= 1 << 3;
if (NewSize == 8 && !memcmp(INS4, T, 8)) FoundMask |= 1 << 4;
if (NewSize == 8 && !memcmp(INS5, T, 8)) FoundMask |= 1 << 5;
if (NewSize == 8 && !memcmp(INS6, T, 8)) FoundMask |= 1 << 6;
if (NewSize == 8 && !memcmp(INS7, T, 8)) FoundMask |= 1 << 7;
}
EXPECT_EQ(FoundMask, 255);
}
TEST(FuzzerMutate, InsertByte1) {
TestInsertByte(&MutationDispatcher::Mutate_InsertByte, 1 << 15);
}
TEST(FuzzerMutate, InsertByte2) {
TestInsertByte(&MutationDispatcher::Mutate, 1 << 17);
}
void TestChangeByte(Mutator M, int NumIter) {
std::unique_ptr<ExternalFunctions> t(new ExternalFunctions());
fuzzer::EF = t.get();
Random Rand(0);
MutationDispatcher MD(Rand, {});
int FoundMask = 0;
uint8_t CH0[8] = {0xF0, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77};
uint8_t CH1[8] = {0x00, 0xF1, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77};
uint8_t CH2[8] = {0x00, 0x11, 0xF2, 0x33, 0x44, 0x55, 0x66, 0x77};
uint8_t CH3[8] = {0x00, 0x11, 0x22, 0xF3, 0x44, 0x55, 0x66, 0x77};
uint8_t CH4[8] = {0x00, 0x11, 0x22, 0x33, 0xF4, 0x55, 0x66, 0x77};
uint8_t CH5[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0xF5, 0x66, 0x77};
uint8_t CH6[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0xF5, 0x77};
uint8_t CH7[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0xF7};
for (int i = 0; i < NumIter; i++) {
uint8_t T[9] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77};
size_t NewSize = (MD.*M)(T, 8, 9);
if (NewSize == 8 && !memcmp(CH0, T, 8)) FoundMask |= 1 << 0;
if (NewSize == 8 && !memcmp(CH1, T, 8)) FoundMask |= 1 << 1;
if (NewSize == 8 && !memcmp(CH2, T, 8)) FoundMask |= 1 << 2;
if (NewSize == 8 && !memcmp(CH3, T, 8)) FoundMask |= 1 << 3;
if (NewSize == 8 && !memcmp(CH4, T, 8)) FoundMask |= 1 << 4;
if (NewSize == 8 && !memcmp(CH5, T, 8)) FoundMask |= 1 << 5;
if (NewSize == 8 && !memcmp(CH6, T, 8)) FoundMask |= 1 << 6;
if (NewSize == 8 && !memcmp(CH7, T, 8)) FoundMask |= 1 << 7;
}
EXPECT_EQ(FoundMask, 255);
}
TEST(FuzzerMutate, ChangeByte1) {
TestChangeByte(&MutationDispatcher::Mutate_ChangeByte, 1 << 15);
}
TEST(FuzzerMutate, ChangeByte2) {
TestChangeByte(&MutationDispatcher::Mutate, 1 << 17);
}
void TestChangeBit(Mutator M, int NumIter) {
std::unique_ptr<ExternalFunctions> t(new ExternalFunctions());
fuzzer::EF = t.get();
Random Rand(0);
MutationDispatcher MD(Rand, {});
int FoundMask = 0;
uint8_t CH0[8] = {0x01, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77};
uint8_t CH1[8] = {0x00, 0x13, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77};
uint8_t CH2[8] = {0x00, 0x11, 0x02, 0x33, 0x44, 0x55, 0x66, 0x77};
uint8_t CH3[8] = {0x00, 0x11, 0x22, 0x37, 0x44, 0x55, 0x66, 0x77};
uint8_t CH4[8] = {0x00, 0x11, 0x22, 0x33, 0x54, 0x55, 0x66, 0x77};
uint8_t CH5[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x54, 0x66, 0x77};
uint8_t CH6[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x76, 0x77};
uint8_t CH7[8] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0xF7};
for (int i = 0; i < NumIter; i++) {
uint8_t T[9] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77};
size_t NewSize = (MD.*M)(T, 8, 9);
if (NewSize == 8 && !memcmp(CH0, T, 8)) FoundMask |= 1 << 0;
if (NewSize == 8 && !memcmp(CH1, T, 8)) FoundMask |= 1 << 1;
if (NewSize == 8 && !memcmp(CH2, T, 8)) FoundMask |= 1 << 2;
if (NewSize == 8 && !memcmp(CH3, T, 8)) FoundMask |= 1 << 3;
if (NewSize == 8 && !memcmp(CH4, T, 8)) FoundMask |= 1 << 4;
if (NewSize == 8 && !memcmp(CH5, T, 8)) FoundMask |= 1 << 5;
if (NewSize == 8 && !memcmp(CH6, T, 8)) FoundMask |= 1 << 6;
if (NewSize == 8 && !memcmp(CH7, T, 8)) FoundMask |= 1 << 7;
}
EXPECT_EQ(FoundMask, 255);
}
TEST(FuzzerMutate, ChangeBit1) {
TestChangeBit(&MutationDispatcher::Mutate_ChangeBit, 1 << 16);
}
TEST(FuzzerMutate, ChangeBit2) {
TestChangeBit(&MutationDispatcher::Mutate, 1 << 18);
}
void TestShuffleBytes(Mutator M, int NumIter) {
std::unique_ptr<ExternalFunctions> t(new ExternalFunctions());
fuzzer::EF = t.get();
Random Rand(0);
MutationDispatcher MD(Rand, {});
int FoundMask = 0;
uint8_t CH0[7] = {0x00, 0x22, 0x11, 0x33, 0x44, 0x55, 0x66};
uint8_t CH1[7] = {0x11, 0x00, 0x33, 0x22, 0x44, 0x55, 0x66};
uint8_t CH2[7] = {0x00, 0x33, 0x11, 0x22, 0x44, 0x55, 0x66};
uint8_t CH3[7] = {0x00, 0x11, 0x22, 0x44, 0x55, 0x66, 0x33};
uint8_t CH4[7] = {0x00, 0x11, 0x22, 0x33, 0x55, 0x44, 0x66};
for (int i = 0; i < NumIter; i++) {
uint8_t T[7] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66};
size_t NewSize = (MD.*M)(T, 7, 7);
if (NewSize == 7 && !memcmp(CH0, T, 7)) FoundMask |= 1 << 0;
if (NewSize == 7 && !memcmp(CH1, T, 7)) FoundMask |= 1 << 1;
if (NewSize == 7 && !memcmp(CH2, T, 7)) FoundMask |= 1 << 2;
if (NewSize == 7 && !memcmp(CH3, T, 7)) FoundMask |= 1 << 3;
if (NewSize == 7 && !memcmp(CH4, T, 7)) FoundMask |= 1 << 4;
}
EXPECT_EQ(FoundMask, 31);
}
TEST(FuzzerMutate, ShuffleBytes1) {
TestShuffleBytes(&MutationDispatcher::Mutate_ShuffleBytes, 1 << 16);
}
TEST(FuzzerMutate, ShuffleBytes2) {
TestShuffleBytes(&MutationDispatcher::Mutate, 1 << 20);
}
void TestAddWordFromDictionary(Mutator M, int NumIter) {
std::unique_ptr<ExternalFunctions> t(new ExternalFunctions());
fuzzer::EF = t.get();
Random Rand(0);
MutationDispatcher MD(Rand, {});
uint8_t Word1[4] = {0xAA, 0xBB, 0xCC, 0xDD};
uint8_t Word2[3] = {0xFF, 0xEE, 0xEF};
MD.AddWordToManualDictionary(Word(Word1, sizeof(Word1)));
MD.AddWordToManualDictionary(Word(Word2, sizeof(Word2)));
int FoundMask = 0;
uint8_t CH0[7] = {0x00, 0x11, 0x22, 0xAA, 0xBB, 0xCC, 0xDD};
uint8_t CH1[7] = {0x00, 0x11, 0xAA, 0xBB, 0xCC, 0xDD, 0x22};
uint8_t CH2[7] = {0x00, 0xAA, 0xBB, 0xCC, 0xDD, 0x11, 0x22};
uint8_t CH3[7] = {0xAA, 0xBB, 0xCC, 0xDD, 0x00, 0x11, 0x22};
uint8_t CH4[6] = {0x00, 0x11, 0x22, 0xFF, 0xEE, 0xEF};
uint8_t CH5[6] = {0x00, 0x11, 0xFF, 0xEE, 0xEF, 0x22};
uint8_t CH6[6] = {0x00, 0xFF, 0xEE, 0xEF, 0x11, 0x22};
uint8_t CH7[6] = {0xFF, 0xEE, 0xEF, 0x00, 0x11, 0x22};
for (int i = 0; i < NumIter; i++) {
uint8_t T[7] = {0x00, 0x11, 0x22};
size_t NewSize = (MD.*M)(T, 3, 7);
if (NewSize == 7 && !memcmp(CH0, T, 7)) FoundMask |= 1 << 0;
if (NewSize == 7 && !memcmp(CH1, T, 7)) FoundMask |= 1 << 1;
if (NewSize == 7 && !memcmp(CH2, T, 7)) FoundMask |= 1 << 2;
if (NewSize == 7 && !memcmp(CH3, T, 7)) FoundMask |= 1 << 3;
if (NewSize == 6 && !memcmp(CH4, T, 6)) FoundMask |= 1 << 4;
if (NewSize == 6 && !memcmp(CH5, T, 6)) FoundMask |= 1 << 5;
if (NewSize == 6 && !memcmp(CH6, T, 6)) FoundMask |= 1 << 6;
if (NewSize == 6 && !memcmp(CH7, T, 6)) FoundMask |= 1 << 7;
}
EXPECT_EQ(FoundMask, 255);
}
TEST(FuzzerMutate, AddWordFromDictionary1) {
TestAddWordFromDictionary(
&MutationDispatcher::Mutate_AddWordFromManualDictionary, 1 << 15);
}
TEST(FuzzerMutate, AddWordFromDictionary2) {
TestAddWordFromDictionary(&MutationDispatcher::Mutate, 1 << 15);
}
void TestAddWordFromDictionaryWithHint(Mutator M, int NumIter) {
std::unique_ptr<ExternalFunctions> t(new ExternalFunctions());
fuzzer::EF = t.get();
Random Rand(0);
MutationDispatcher MD(Rand, {});
uint8_t W[] = {0xAA, 0xBB, 0xCC, 0xDD, 0xFF, 0xEE, 0xEF};
size_t PosHint = 7777;
MD.AddWordToAutoDictionary(Word(W, sizeof(W)), PosHint);
int FoundMask = 0;
for (int i = 0; i < NumIter; i++) {
uint8_t T[10000];
memset(T, 0, sizeof(T));
size_t NewSize = (MD.*M)(T, 9000, 10000);
if (NewSize >= PosHint + sizeof(W) &&
!memcmp(W, T + PosHint, sizeof(W)))
FoundMask = 1;
}
EXPECT_EQ(FoundMask, 1);
}
TEST(FuzzerMutate, AddWordFromDictionaryWithHint1) {
TestAddWordFromDictionaryWithHint(
&MutationDispatcher::Mutate_AddWordFromTemporaryAutoDictionary, 1 << 5);
}
TEST(FuzzerMutate, AddWordFromDictionaryWithHint2) {
TestAddWordFromDictionaryWithHint(&MutationDispatcher::Mutate, 1 << 10);
}
void TestChangeASCIIInteger(Mutator M, int NumIter) {
std::unique_ptr<ExternalFunctions> t(new ExternalFunctions());
fuzzer::EF = t.get();
Random Rand(0);
MutationDispatcher MD(Rand, {});
uint8_t CH0[8] = {'1', '2', '3', '4', '5', '6', '7', '7'};
uint8_t CH1[8] = {'1', '2', '3', '4', '5', '6', '7', '9'};
uint8_t CH2[8] = {'2', '4', '6', '9', '1', '3', '5', '6'};
uint8_t CH3[8] = {'0', '6', '1', '7', '2', '8', '3', '9'};
int FoundMask = 0;
for (int i = 0; i < NumIter; i++) {
uint8_t T[8] = {'1', '2', '3', '4', '5', '6', '7', '8'};
size_t NewSize = (MD.*M)(T, 8, 8);
/**/ if (NewSize == 8 && !memcmp(CH0, T, 8)) FoundMask |= 1 << 0;
else if (NewSize == 8 && !memcmp(CH1, T, 8)) FoundMask |= 1 << 1;
else if (NewSize == 8 && !memcmp(CH2, T, 8)) FoundMask |= 1 << 2;
else if (NewSize == 8 && !memcmp(CH3, T, 8)) FoundMask |= 1 << 3;
else if (NewSize == 8) FoundMask |= 1 << 4;
}
EXPECT_EQ(FoundMask, 31);
}
TEST(FuzzerMutate, ChangeASCIIInteger1) {
TestChangeASCIIInteger(&MutationDispatcher::Mutate_ChangeASCIIInteger,
1 << 15);
}
TEST(FuzzerMutate, ChangeASCIIInteger2) {
TestChangeASCIIInteger(&MutationDispatcher::Mutate, 1 << 15);
}
TEST(FuzzerDictionary, ParseOneDictionaryEntry) {
Unit U;
EXPECT_FALSE(ParseOneDictionaryEntry("", &U));
EXPECT_FALSE(ParseOneDictionaryEntry(" ", &U));
EXPECT_FALSE(ParseOneDictionaryEntry("\t ", &U));
EXPECT_FALSE(ParseOneDictionaryEntry(" \" ", &U));
EXPECT_FALSE(ParseOneDictionaryEntry(" zz\" ", &U));
EXPECT_FALSE(ParseOneDictionaryEntry(" \"zz ", &U));
EXPECT_FALSE(ParseOneDictionaryEntry(" \"\" ", &U));
EXPECT_TRUE(ParseOneDictionaryEntry("\"a\"", &U));
EXPECT_EQ(U, Unit({'a'}));
EXPECT_TRUE(ParseOneDictionaryEntry("\"abc\"", &U));
EXPECT_EQ(U, Unit({'a', 'b', 'c'}));
EXPECT_TRUE(ParseOneDictionaryEntry("abc=\"abc\"", &U));
EXPECT_EQ(U, Unit({'a', 'b', 'c'}));
EXPECT_FALSE(ParseOneDictionaryEntry("\"\\\"", &U));
EXPECT_TRUE(ParseOneDictionaryEntry("\"\\\\\"", &U));
EXPECT_EQ(U, Unit({'\\'}));
EXPECT_TRUE(ParseOneDictionaryEntry("\"\\xAB\"", &U));
EXPECT_EQ(U, Unit({0xAB}));
EXPECT_TRUE(ParseOneDictionaryEntry("\"\\xABz\\xDE\"", &U));
EXPECT_EQ(U, Unit({0xAB, 'z', 0xDE}));
EXPECT_TRUE(ParseOneDictionaryEntry("\"#\"", &U));
EXPECT_EQ(U, Unit({'#'}));
EXPECT_TRUE(ParseOneDictionaryEntry("\"\\\"\"", &U));
EXPECT_EQ(U, Unit({'"'}));
}
TEST(FuzzerDictionary, ParseDictionaryFile) {
std::vector<Unit> Units;
EXPECT_FALSE(ParseDictionaryFile("zzz\n", &Units));
EXPECT_FALSE(ParseDictionaryFile("", &Units));
EXPECT_TRUE(ParseDictionaryFile("\n", &Units));
EXPECT_EQ(Units.size(), 0U);
EXPECT_TRUE(ParseDictionaryFile("#zzzz a b c d\n", &Units));
EXPECT_EQ(Units.size(), 0U);
EXPECT_TRUE(ParseDictionaryFile(" #zzzz\n", &Units));
EXPECT_EQ(Units.size(), 0U);
EXPECT_TRUE(ParseDictionaryFile(" #zzzz\n", &Units));
EXPECT_EQ(Units.size(), 0U);
EXPECT_TRUE(ParseDictionaryFile(" #zzzz\naaa=\"aa\"", &Units));
EXPECT_EQ(Units, std::vector<Unit>({Unit({'a', 'a'})}));
EXPECT_TRUE(
ParseDictionaryFile(" #zzzz\naaa=\"aa\"\n\nabc=\"abc\"", &Units));
EXPECT_EQ(Units,
std::vector<Unit>({Unit({'a', 'a'}), Unit({'a', 'b', 'c'})}));
}
TEST(FuzzerUtil, Base64) {
EXPECT_EQ("", Base64({}));
EXPECT_EQ("YQ==", Base64({'a'}));
EXPECT_EQ("eA==", Base64({'x'}));
EXPECT_EQ("YWI=", Base64({'a', 'b'}));
EXPECT_EQ("eHk=", Base64({'x', 'y'}));
EXPECT_EQ("YWJj", Base64({'a', 'b', 'c'}));
EXPECT_EQ("eHl6", Base64({'x', 'y', 'z'}));
EXPECT_EQ("YWJjeA==", Base64({'a', 'b', 'c', 'x'}));
EXPECT_EQ("YWJjeHk=", Base64({'a', 'b', 'c', 'x', 'y'}));
EXPECT_EQ("YWJjeHl6", Base64({'a', 'b', 'c', 'x', 'y', 'z'}));
}
TEST(Corpus, Distribution) {
std::unique_ptr<ExternalFunctions> t(new ExternalFunctions());
fuzzer::EF = t.get();
Random Rand(0);
MutationDispatcher MD(Rand, {});
Fuzzer Fuzz(LLVMFuzzerTestOneInput, MD, {});
size_t N = 10;
size_t TriesPerUnit = 1<<20;
for (size_t i = 0; i < N; i++) {
Fuzz.AddToCorpus(Unit{ static_cast<uint8_t>(i) });
}
std::vector<size_t> Hist(N);
for (size_t i = 0; i < N * TriesPerUnit; i++) {
Hist[Fuzz.ChooseUnitIdxToMutate()]++;
}
for (size_t i = 0; i < N; i++) {
// A weak sanity check that every unit gets invoked.
EXPECT_GT(Hist[i], TriesPerUnit / N / 3);
}
}