From 2aa4a82499d4becd2284cdb482213d541b8804dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 16:29:10 +0200 Subject: Adding upstream version 86.0.1. Signed-off-by: Daniel Baumann --- tools/fuzzing/common/FuzzingMutate.cpp | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 tools/fuzzing/common/FuzzingMutate.cpp (limited to 'tools/fuzzing/common/FuzzingMutate.cpp') diff --git a/tools/fuzzing/common/FuzzingMutate.cpp b/tools/fuzzing/common/FuzzingMutate.cpp new file mode 100644 index 0000000000..bb5e930125 --- /dev/null +++ b/tools/fuzzing/common/FuzzingMutate.cpp @@ -0,0 +1,32 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "FuzzingMutate.h" +#include "FuzzingTraits.h" + +namespace mozilla { +namespace fuzzing { + +/** + * Randomly mutates a byte inside |aData| by using bit manipulation. + */ +/* static */ +void FuzzingMutate::ChangeBit(uint8_t* aData, size_t aLength) { + size_t offset = RandomIntegerRange(0, aLength); + aData[offset] ^= (1 << FuzzingTraits::Random(9)); +} + +/** + * Randomly replaces a byte inside |aData| with one in the range of [0, 255]. + */ +/* static */ +void FuzzingMutate::ChangeByte(uint8_t* aData, size_t aLength) { + size_t offset = RandomIntegerRange(0, aLength); + aData[offset] = RandomInteger(); +} + +} // namespace fuzzing +} // namespace mozilla -- cgit v1.2.3