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[libFuzzer] add test/LargeTest.cpp, mostly for manual experiments with large number of edges, not yet suitable for unit testing

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@297544 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Kostya Serebryany 2017-03-11 01:54:06 +00:00
parent f0f231aaf9
commit 47ec3386d2
1 changed files with 37 additions and 0 deletions
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37
lib/Fuzzer/test/LargeTest.cpp Normal file
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// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
// A fuzz target with lots of edges.
#include <cstdint>
#include <cstdlib>
static inline void break_optimization(const void *arg) {
__asm__ __volatile__("" : : "r" (arg) : "memory");
}
#define A \
do { \
i++; \
c++; \
if (Data[(i + __LINE__) % Size] == (c % 256)) \
break_optimization(Data); \
else \
break_optimization(0); \
} while (0)
// for (int i = 0, n = Data[(__LINE__ - 1) % Size] % 16; i < n; i++)
#define B do{A; A; A; A; A; A; A; A; A; A; A; A; A; A; A; A; A; A; }while(0)
#define C do{B; B; B; B; B; B; B; B; B; B; B; B; B; B; B; B; B; B; }while(0)
#define D do{C; C; C; C; C; C; C; C; C; C; C; C; C; C; C; C; C; C; }while(0)
#define E do{D; D; D; D; D; D; D; D; D; D; D; D; D; D; D; D; D; D; }while(0)
volatile int sink;
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
if (!Size) return 0;
int c = 0;
int i = 0;
D;
return 0;
}