diff options
author | Harald Fernengel <harald@trolltech.com> | 2009-06-16 13:40:54 (GMT) |
---|---|---|
committer | Harald Fernengel <harald@trolltech.com> | 2009-06-16 13:40:54 (GMT) |
commit | cb6cd0e4159606619b1ce708c1b00f8d294cc4bb (patch) | |
tree | 681160b3d2f73e8ba0e5a1c55635b45251864817 /tests/auto/exceptionsafety_objects/tst_exceptionsafety_objects.cpp | |
parent | a2e43777945fc77d9837e9212b87cdfa2d1254c1 (diff) | |
download | Qt-cb6cd0e4159606619b1ce708c1b00f8d294cc4bb.zip Qt-cb6cd0e4159606619b1ce708c1b00f8d294cc4bb.tar.gz Qt-cb6cd0e4159606619b1ce708c1b00f8d294cc4bb.tar.bz2 |
add an out of memory checker
Diffstat (limited to 'tests/auto/exceptionsafety_objects/tst_exceptionsafety_objects.cpp')
-rw-r--r-- | tests/auto/exceptionsafety_objects/tst_exceptionsafety_objects.cpp | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/tests/auto/exceptionsafety_objects/tst_exceptionsafety_objects.cpp b/tests/auto/exceptionsafety_objects/tst_exceptionsafety_objects.cpp new file mode 100644 index 0000000..31c8f0a --- /dev/null +++ b/tests/auto/exceptionsafety_objects/tst_exceptionsafety_objects.cpp @@ -0,0 +1,149 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the test suite of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtGui/QtGui> +#include <QtTest/QtTest> + +QT_USE_NAMESPACE + +// this test only works with GLIBC (let moc run regardless, because it doesn't know about __GLIBC__) +#if defined(QT_NO_EXCEPTIONS) || (!defined(__GLIBC__) && !defined(Q_MOC_RUN)) + QTEST_NOOP_MAIN +#else + +#include "oomsimulator.h" + +class tst_ExceptionSafetyObjects: public QObject +{ + Q_OBJECT + +public slots: + void initTestCase(); + +private slots: + void widgets_data(); + void widgets(); +}; + +void tst_ExceptionSafetyObjects::initTestCase() +{ +} + +// helper structs to create an arbitrary widget +struct AbstractWidgetCreator +{ + virtual QWidget *create(QWidget *parent) = 0; +}; + +Q_DECLARE_METATYPE(AbstractWidgetCreator *) + +template <typename T> +struct WidgetCreator : public AbstractWidgetCreator +{ + QWidget *create(QWidget *parent) + { + return parent ? new T(parent) : new T; + } +}; + +void tst_ExceptionSafetyObjects::widgets_data() +{ + QTest::addColumn<AbstractWidgetCreator *>("widgetCreator"); + +#define NEWROW(T) QTest::newRow(#T) << static_cast<AbstractWidgetCreator *>(new WidgetCreator<T >) + NEWROW(QWidget); + NEWROW(QPushButton); + NEWROW(QLabel); +} + +void tst_ExceptionSafetyObjects::widgets() +{ + QFETCH(AbstractWidgetCreator *, widgetCreator); + + mallocCount = freeCount = 0; + + int currentOOMIndex = 0; + + // activate mallocFail - WE'RE HOT! + AllocFailActivator allocFailActivator; + + do { + // start after first alloc (the first alloc is creation of the widget itself) + mallocFailIndex = ++currentOOMIndex; + + // first, create without a parent + try { + QScopedPointer<QWidget> ptr(widgetCreator->create(0)); + // QScopedPointer deletes the widget again here. + } catch (const std::bad_alloc &) { + // ignore all std::bad_alloc - note: valgrind should show no leaks + } + + // repeat the loop until we the malloc fail index indicates that + // there was no OOM simulation happening + } while (mallocFailIndex <= 0); + + // reset counting + currentOOMIndex = 0; + + do { + mallocFailIndex = ++currentOOMIndex; + + // create the widget with a parent + try { + QWidget parent; + widgetCreator->create(&parent); + // parent goes out of scope - widget should be deleted as well + } catch (const std::bad_alloc &) { + } + } while (mallocFailIndex <= 0); + +#ifdef VERBOSE + allocFailActivator.deactivate(); + + qDebug() << "mallocCount" << mallocCount << "freeCount" << freeCount << + "simulated alloc fails" << currentOOMIndex; +#endif +} + +QTEST_MAIN(tst_ExceptionSafetyObjects) +#include "tst_exceptionsafety_objects.moc" +#endif // QT_NO_EXCEPTIONS |