main.cpp - mozsearch

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// Copyright (C) 2026 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

#include <QGuiApplication>

#include <QtGlobal>

#include <QQmlEngine>

#include <QFont>

#include <QQuickWindow>

#include <QtQuickVectorImage/private/qquickvectorimage_p.h>

#include <QtQuickVectorImage/private/qquickvectorimage_p_p.h>

#include <QtGui/private/qfont_p.h>

#include <QFile>

#ifdef QT_ASAN_ENABLED

#  include <sanitizer/lsan_interface.h>

#else

#  define __lsan_disable()

#  define __lsan_enable()

#endif

// silence warnings

static QtMessageHandler mh = qInstallMessageHandler([](QtMsgType, const QMessageLogContext &,

                                                       const QString &) {});

// Driver may allocate caches or other persistent state, which we need to suppress.

// Add any false positive leaks here.

extern "C" const char *__lsan_default_suppressions()

    return "leak:libgallium\n"

           "leak:swrast\n"

           "leak:libGLX\n"

           "leak:libEGL\n"

           "leak:libfontconfig\n"

           "leak:swiftshader\n"

           "leak:libvulkan\n";

Q_GLOBAL_STATIC(std::shared_ptr<QGuiApplication>, guiApp)

Q_GLOBAL_STATIC(QQuickWindow, window)

Q_GLOBAL_STATIC(QQuickVectorImage, vectorImage)

Q_GLOBAL_STATIC(QQmlEngine, engine)

extern "C" int LLVMFuzzerInitialize(int *_argc, char ***_argv)

    Q_UNUSED(_argc);

    Q_UNUSED(_argv);

    // One-time setup allocations referenced only from the mmap'ed V4 GC heap

    // are invisible to LeakSanitizer, so ignore everything allocated here.

    __lsan_disable();

    static int argc = 1;

    static char arg1[] = "fuzzer";

    static char *argv[] = {arg1, nullptr};

    QHashSeed::setDeterministicGlobalSeed();

    (*guiApp()) = std::make_shared<QGuiApplication>(argc, argv);

    window()->resize(512, 512);

    window()->show();

    QQmlEngine::setContextForObject(vectorImage(), engine()->rootContext());

    vectorImage()->setParentItem(window()->contentItem());

    vectorImage()->setSize(window()->size());

    __lsan_enable();

    return 0;

extern "C" int LLVMFuzzerTestOneInput(const char *Data, size_t Size)

    QByteArray data = QByteArray::fromRawData(Data, Size);

    QQuickVectorImagePrivate *d = QQuickVectorImagePrivate::get(vectorImage());

    d->setSourceData(data);

    window()->grabWindow(); // renders one frame

    d->setSourceData(QByteArray{});

    QCoreApplication::sendPostedEvents(nullptr, QEvent::DeferredDelete);

    QCoreApplication::processEvents();

    QFontCache::instance()->clear();

    return 0;