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https://github.com/c64scene-ar/llvm-6502.git
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c9baf3befb
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
62 lines
1.5 KiB
C++
62 lines
1.5 KiB
C++
//===- FuzzerUtil.cpp - Misc utils ----------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// Misc utils.
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//===----------------------------------------------------------------------===//
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#include "FuzzerInternal.h"
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#include <iostream>
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#include <sys/time.h>
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#include <cassert>
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#include <cstring>
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#include <signal.h>
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namespace fuzzer {
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void Print(const Unit &v, const char *PrintAfter) {
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std::cerr << v.size() << ": ";
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for (auto x : v)
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std::cerr << (unsigned) x << " ";
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std::cerr << PrintAfter;
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}
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void PrintASCII(const Unit &U, const char *PrintAfter) {
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for (auto X : U)
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std::cerr << (char)((isascii(X) && X >= ' ') ? X : '?');
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std::cerr << PrintAfter;
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}
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std::string Hash(const Unit &in) {
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size_t h1 = 0, h2 = 0;
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for (auto x : in) {
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h1 += x;
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h1 *= 5;
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h2 += x;
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h2 *= 7;
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}
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return std::to_string(h1) + std::to_string(h2);
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}
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static void AlarmHandler(int, siginfo_t *, void *) {
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Fuzzer::AlarmCallback();
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}
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void SetTimer(int Seconds) {
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struct itimerval T {{Seconds, 0}, {Seconds, 0}};
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std::cerr << "SetTimer " << Seconds << "\n";
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int Res = setitimer(ITIMER_REAL, &T, nullptr);
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assert(Res == 0);
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struct sigaction sigact;
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memset(&sigact, 0, sizeof(sigact));
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sigact.sa_sigaction = AlarmHandler;
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Res = sigaction(SIGALRM, &sigact, 0);
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assert(Res == 0);
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}
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} // namespace fuzzer
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