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https://github.com/c64scene-ar/llvm-6502.git
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6f1b9541ba
Summary: This adds a SHA1 implementation taken from public domain code. The change is trivial, but as it involves third-party code I'd like a second pair of eyes before commit. LibFuzzer can not use SHA1 from openssl because openssl may not be available and because we may be fuzzing openssl itself. Using sha1sum via a pipe is too slow. Test Plan: n/a Reviewers: chandlerc Reviewed By: chandlerc Subscribers: majnemer, llvm-commits Differential Revision: http://reviews.llvm.org/D9733 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237400 91177308-0d34-0410-b5e6-96231b3b80d8
74 lines
1.9 KiB
C++
74 lines
1.9 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 <sstream>
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#include <iomanip>
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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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#include <unistd.h>
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namespace fuzzer {
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void Print(const Unit &v, const char *PrintAfter) {
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for (auto x : v)
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std::cerr << "0x" << std::hex << (unsigned) x << std::dec << ",";
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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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if (isprint(X))
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std::cerr << X;
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else
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std::cerr << "\\x" << std::hex << (int)(unsigned)X << std::dec;
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}
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std::cerr << PrintAfter;
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}
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std::string Hash(const Unit &U) {
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uint8_t Hash[kSHA1NumBytes];
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ComputeSHA1(U.data(), U.size(), Hash);
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std::stringstream SS;
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for (int i = 0; i < kSHA1NumBytes; i++)
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SS << std::hex << std::setfill('0') << std::setw(2) << (unsigned)Hash[i];
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return SS.str();
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}
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static void AlarmHandler(int, siginfo_t *, void *) {
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Fuzzer::StaticAlarmCallback();
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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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int NumberOfCpuCores() {
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FILE *F = popen("nproc", "r");
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int N = 0;
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fscanf(F, "%d", &N);
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fclose(F);
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return N;
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}
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} // namespace fuzzer
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