Revision control
+ // 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 <QQuickWindow>
+ #include <QtGui/private/qfont_p.h>
+ #include <QtQuickVectorImage/private/qquickvectorimage_p.h>
+ #include <QtQuickVectorImage/private/qquickvectorimage_p_p.h>
+
+ #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());
+ vectorImage()->setAssumeTrustedSource(true);
+
+ __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;
+ }