forked from mirrors/gecko-dev
0204cde0f2
I though this was going to be enough to unbreak rr, but it seems not to be the case, see https://github.com/mozilla/rr/issues/2329. In any case avoiding static initializers that initialize PR seems desirable. Differential Revision: https://phabricator.services.mozilla.com/D23706 --HG-- extra : moz-landing-system : lando
41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <prinrval.h>
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#include <thread>
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#include <mutex>
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#include "FuzzingTraits.h"
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namespace mozilla {
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namespace fuzzing {
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/* static */
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unsigned int FuzzingTraits::Random(unsigned int aMax) {
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MOZ_ASSERT(aMax > 0, "aMax needs to be bigger than 0");
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std::uniform_int_distribution<unsigned int> d(0, aMax);
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return d(Rng());
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}
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/* static */
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bool FuzzingTraits::Sometimes(unsigned int aProbability) {
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return FuzzingTraits::Random(aProbability) == 0;
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}
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/* static */
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size_t FuzzingTraits::Frequency(const size_t aSize, const uint64_t aFactor) {
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return RandomIntegerRange<size_t>(0, ceil(float(aSize) / aFactor)) + 1;
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}
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/* static */
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std::mt19937_64& FuzzingTraits::Rng() {
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static std::mt19937_64 rng;
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static std::once_flag flag;
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std::call_once(flag, [&] { rng.seed(PR_IntervalNow()); });
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return rng;
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}
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} // namespace fuzzing
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} // namespace mozilla
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