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Diffstat (limited to 'tests')
3 files changed, 78 insertions, 0 deletions
diff --git a/tests/libfuzzer/README b/tests/libfuzzer/README new file mode 100644 index 0000000000..ed668ff9e2 --- /dev/null +++ b/tests/libfuzzer/README @@ -0,0 +1,37 @@ +This directory contains tests to be run with clang's libFuzzer. It will generate data, pass this +data to the function + + LLVMFuzzerTestOneInput(const char *Data, size_t Size) + +of the test and track the code execution. Should the test crash, libFuzzer will provide you with the +data which triggered the crash. You can then use this to debug and fix the called code. + +! Please note: The purpose of fuzz testing is to find unexpected code paths. Running fuzz tests may! +! result in unforeseen bevavior, including loss of data. Consider running the tests in an isolated ! +! environment, e.g. on a virtual machine. You have been warned. ! + +To run a test with libFuzzer: + +1. Install libFuzzer, e.g. from the repositories of the Linux distribution you are using. +2. Make sure clang and clang++ from this version of clang are found in PATH. +3. Configure Qt with + -platform linux-clang -coverage trace-pc-guard + to add the needed code coverage instrumentation. Since speed of execution is crucial for fuzz + testing, it's recommendable to also use the switches + -release -static + It might also make sense to add sanitzers by passing + -sanitize <...> +4. Build Qt. +5. Build one of the tests using this Qt build. +6. Execute the resulting executable. + Depending on the expected input format of the tested function, you will get results faster if + you: + * provide a set of interesting input data by passing the path of a directory which contains + these data, each in one file. You can find such datasets in the subdirectory "testcases". + * pass a so-called dictionary listing keywords of the input format using + -dict=<dictionary file> + A couple of such dictionaries are provided by AFL (http://lcamtuf.coredump.cx/afl/) + * tell libFuzzer to generate only ASCII data using + -only_ascii=1 + +For further info, see https://llvm.org/docs/LibFuzzer.html diff --git a/tests/libfuzzer/corelib/serialization/qxmlstream/qxmlstreamreader/readnext/main.cpp b/tests/libfuzzer/corelib/serialization/qxmlstream/qxmlstreamreader/readnext/main.cpp new file mode 100644 index 0000000000..5a60c78cb5 --- /dev/null +++ b/tests/libfuzzer/corelib/serialization/qxmlstream/qxmlstreamreader/readnext/main.cpp @@ -0,0 +1,36 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the test suite of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:GPL-EXCEPT$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3 as published by the Free Software +** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QXmlStreamReader> + +extern "C" int LLVMFuzzerTestOneInput(const char *Data, size_t Size) { + QXmlStreamReader reader(QByteArray(Data, Size)); + while (!reader.atEnd()) + reader.readNext(); + return 0; +} diff --git a/tests/libfuzzer/corelib/serialization/qxmlstream/qxmlstreamreader/readnext/readnext.pro b/tests/libfuzzer/corelib/serialization/qxmlstream/qxmlstreamreader/readnext/readnext.pro new file mode 100644 index 0000000000..8c890f5b6e --- /dev/null +++ b/tests/libfuzzer/corelib/serialization/qxmlstream/qxmlstreamreader/readnext/readnext.pro @@ -0,0 +1,5 @@ +QT -= gui +CONFIG += c++11 console +CONFIG -= app_bundle +SOURCES += main.cpp +LIBS += -lFuzzer |