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[libFuzzer] make SimpleCmpTest a bit simpler to crack and more verbose 

llvm-svn: 289477
This commit is contained in:
Kostya Serebryany 2016-12-12 22:39:33 +00:00
parent 62104ee6d9
commit a4b43bf8e8
1 changed files with 26 additions and 15 deletions
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41
llvm/lib/Fuzzer/test/SimpleCmpTest.cpp
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@ -7,25 +7,34 @@
#include <cstring>
#include <cstdio>
extern int AllLines[];
bool PrintOnce(int Line) {
if (!AllLines[Line])
fprintf(stderr, "Seen line %d\n", Line);
AllLines[Line] = 1;
return true;
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
if (Size < 14) return 0;
if (Size != 22) return 0;
uint64_t x = 0;
int64_t y = 0;
int z = 0;
unsigned short a = 0;
memcpy(&x, Data, 8);
memcpy(&y, Data + Size - 8, 8);
memcpy(&z, Data + Size / 2, sizeof(z));
memcpy(&a, Data + Size / 2 + 4, sizeof(a));
int32_t z = 0;
uint16_t a = 0;
memcpy(&x, Data, 8); // 8
memcpy(&y, Data + 8, 8); // 16
memcpy(&z, Data + 16, sizeof(z)); // 20
memcpy(&a, Data + 20, sizeof(a)); // 22
if (x > 1234567890 &&
x < 1234567895 &&
y >= 987654321 &&
y <= 987654325 &&
z < -10000 &&
z >= -10005 &&
z != -10003 &&
a == 4242 &&
if (x > 1234567890 && PrintOnce(__LINE__) &&
x < 1234567895 && PrintOnce(__LINE__) &&
a == 0x4242 && PrintOnce(__LINE__) &&
y >= 987654321 && PrintOnce(__LINE__) &&
y <= 987654325 && PrintOnce(__LINE__) &&
z < -10000 && PrintOnce(__LINE__) &&
z >= -10005 && PrintOnce(__LINE__) &&
z != -10003 && PrintOnce(__LINE__) &&
true) {
fprintf(stderr, "BINGO; Found the target: size %zd (%zd, %zd, %d, %d), exiting.\n",
Size, x, y, z, a);
@ -33,3 +42,5 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
}
return 0;
}
int AllLines[__LINE__ + 1]; // Must be the last line.