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57 lines
2.0 KiB
C++
57 lines
2.0 KiB
C++
// Simple test for a fuzzer.
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// Try to find the target using the indirect caller-callee pairs.
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#include <cstdint>
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#include <cstdlib>
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#include <cstddef>
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#include <cstring>
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#include <iostream>
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typedef void (*F)();
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static F t[256];
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void f34() {
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std::cerr << "BINGO\n";
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exit(1);
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}
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void f23() { t[(unsigned)'d'] = f34;}
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void f12() { t[(unsigned)'c'] = f23;}
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void f01() { t[(unsigned)'b'] = f12;}
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void f00() {}
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static F t0[256] = {
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f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00,
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f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00,
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f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00,
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f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00,
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f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00,
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f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00,
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f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00,
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f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00,
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f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00,
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f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00,
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f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00,
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f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00,
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f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00,
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f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00,
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f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00,
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f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00, f00,
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};
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
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if (Size < 4) return 0;
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// Spoof the counters.
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for (int i = 0; i < 200; i++) {
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f23();
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f12();
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f01();
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}
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memcpy(t, t0, sizeof(t));
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t[(unsigned)'a'] = f01;
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t[Data[0]]();
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t[Data[1]]();
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t[Data[2]]();
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t[Data[3]]();
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return 0;
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}
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