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Add a Fuzzer library

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Summary:
A simple genetic in-process coverage-guided fuzz testing library.

I've used this fuzzer to test clang-format
(it found 12+ bugs, thanks djasper@ for the fixes!)
and it may also help us test other parts of LLVM.
So why not keep it in the LLVM repository?

I plan to add the cmake build rules later (in a separate patch, if that's ok)
and also add a clang-format-fuzzer target.

See README.txt for details.

Test Plan: Tests will follow separately.

Reviewers: djasper, chandlerc, rnk

Reviewed By: rnk

Subscribers: majnemer, ygribov, dblaikie, llvm-commits

Differential Revision: http://reviews.llvm.org/D7184

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227252 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Kostya Serebryany
2015-01-27 22:08:41 +00:00
parent 37be0d7c43
commit c9baf3befb
17 changed files with 799 additions and 0 deletions
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21
lib/Fuzzer/test/TimeoutTest.cpp Normal file
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// Simple test for a fuzzer. The fuzzer must find the string "Hi!".
#include <cstdlib>
#include <cstddef>
#include <iostream>
static volatile int Sink;
extern "C" void TestOneInput(const uint8_t *Data, size_t Size) {
if (Size > 0 && Data[0] == 'H') {
Sink = 1;
if (Size > 1 && Data[1] == 'i') {
Sink = 2;
if (Size > 2 && Data[2] == '!') {
Size = 2;
while (Sink)
;
}
}
}
}