llvm-project/compiler-rt/test/fuzzer/DeepRecursionTest.cpp
George Karpenkov 10ab2ace13 Move libFuzzer to compiler_rt.
Resulting library binaries will be named libclang_rt.fuzzer*, and will
be placed in Clang toolchain, allowing redistribution.

Differential Revision: https://reviews.llvm.org/D36908

llvm-svn: 311407
2017-08-21 23:25:50 +00:00

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C++

// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
// Simple test for a fuzzer. The fuzzer must find the deep recursion.
// To generate a crashy input:
// for((i=0;i<110;i++)); do echo -n ABCDEFGHIJ >> INPUT; done
#include <cstddef>
#include <cstdint>
#include <cstdlib>
static volatile int Sink;
void Recursive(const uint8_t *Data, size_t Size, int Depth) {
if (Depth > 1000) abort();
if (!Size) return;
if (*Data == ('A' + Depth % 10))
Recursive(Data + 1, Size - 1, Depth + 1);
Sink++;
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
Recursive(Data, Size, 0);
return 0;
}