llvm-project/llvm/lib/Fuzzer/test/DFSanSimpleCmpTest.cpp

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// Simple test for a fuzzer. The fuzzer must find several narrow ranges.
#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <cstdio>
extern "C" void LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
if (Size < 14) return;
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));
if (x > 1234567890 &&
x < 1234567895 &&
y >= 987654321 &&
y <= 987654325 &&
z < -10000 &&
z >= -10005 &&
z != -10003 &&
a == 4242) {
fprintf(stderr, "BINGO; Found the target: size %zd (%zd, %zd, %d, %d), exiting.\n",
Size, x, y, z, a);
exit(1);
}
}