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/****************************************************************************
**
** Copyright (C) 2016 Thiago Macieira <thiago@kde.org>
** Copyright (C) 2016 Intel Corporation.
** 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 <QtCore/QThread>
#include <QTest>
#include <QReadWriteLock>
#if defined(Q_OS_UNIX) && !defined(Q_OS_INTEGRITY)
#include <sys/resource.h>
#endif
#include <QtTest/private/qemulationdetector_p.h>
class tst_QGlobalStatic : public QObject
{
Q_OBJECT
public Q_SLOTS:
void initTestCase();
private Q_SLOTS:
void beforeInitialization();
void api();
void constVolatile();
void exception();
void catchExceptionAndRetry();
void threadStressTest();
void afterDestruction();
};
void tst_QGlobalStatic::initTestCase()
{
#if defined(Q_OS_UNIX) && !defined(Q_OS_INTEGRITY)
// The tests create a lot of threads, which require file descriptors. On systems like
// OS X low defaults such as 256 as the limit for the number of simultaneously
// open files is not sufficient.
struct rlimit numFiles;
if (getrlimit(RLIMIT_NOFILE, &numFiles) == 0 && numFiles.rlim_cur < 1024) {
numFiles.rlim_cur = qMin(rlim_t(1024), numFiles.rlim_max);
setrlimit(RLIMIT_NOFILE, &numFiles);
}
#endif
}
Q_GLOBAL_STATIC_WITH_ARGS(const int, constInt, (42))
Q_GLOBAL_STATIC_WITH_ARGS(volatile int, volatileInt, (-47))
void otherFunction()
{
// never called
constInt();
volatileInt();
}
// do not initialize the following Q_GLOBAL_STATIC
Q_GLOBAL_STATIC(int, checkedBeforeInitialization)
void tst_QGlobalStatic::beforeInitialization()
{
QVERIFY(!checkedBeforeInitialization.exists());
QVERIFY(!checkedBeforeInitialization.isDestroyed());
}
struct Type {
int i;
};
Q_GLOBAL_STATIC(Type, checkedAfterInitialization)
void tst_QGlobalStatic::api()
{
// check the API
QVERIFY((Type *)checkedAfterInitialization);
QVERIFY(checkedAfterInitialization());
*checkedAfterInitialization = Type();
*checkedAfterInitialization() = Type();
checkedAfterInitialization()->i = 47;
checkedAfterInitialization->i = 42;
QCOMPARE(checkedAfterInitialization()->i, 42);
checkedAfterInitialization()->i = 47;
QCOMPARE(checkedAfterInitialization->i, 47);
QVERIFY(checkedAfterInitialization.exists());
QVERIFY(!checkedAfterInitialization.isDestroyed());
}
void tst_QGlobalStatic::constVolatile()
{
QCOMPARE(*constInt(), 42);
QCOMPARE((int)*volatileInt(), -47);
QCOMPARE(*constInt(), 42);
QCOMPARE((int)*volatileInt(), -47);
}
struct ThrowingType
{
static QBasicAtomicInt constructedCount;
static QBasicAtomicInt destructedCount;
ThrowingType()
{
throw 0;
}
ThrowingType(QBasicAtomicInt &throwControl)
{
constructedCount.ref();
if (throwControl.fetchAndAddRelaxed(-1) != 0)
throw 0;
}
~ThrowingType() { destructedCount.ref(); }
};
QBasicAtomicInt ThrowingType::constructedCount = Q_BASIC_ATOMIC_INITIALIZER(0);
QBasicAtomicInt ThrowingType::destructedCount = Q_BASIC_ATOMIC_INITIALIZER(0);
Q_GLOBAL_STATIC(ThrowingType, throwingGS)
void tst_QGlobalStatic::exception()
{
bool exceptionCaught = false;
try {
throwingGS();
} catch (int) {
exceptionCaught = true;
}
QVERIFY(exceptionCaught);
QCOMPARE(QtGlobalStatic::Holder<Q_QGS_throwingGS>::guard.loadRelaxed(), 0);
QVERIFY(!throwingGS.exists());
QVERIFY(!throwingGS.isDestroyed());
}
QBasicAtomicInt exceptionControlVar = Q_BASIC_ATOMIC_INITIALIZER(1);
Q_GLOBAL_STATIC_WITH_ARGS(ThrowingType, exceptionGS, (exceptionControlVar))
void tst_QGlobalStatic::catchExceptionAndRetry()
{
if (exceptionControlVar.loadRelaxed() != 1)
QSKIP("This test cannot be run more than once");
ThrowingType::constructedCount.storeRelaxed(0);
ThrowingType::destructedCount.storeRelaxed(0);
bool exceptionCaught = false;
try {
exceptionGS();
} catch (int) {
exceptionCaught = true;
}
QCOMPARE(ThrowingType::constructedCount.loadRelaxed(), 1);
QVERIFY(exceptionCaught);
exceptionGS();
QCOMPARE(ThrowingType::constructedCount.loadRelaxed(), 2);
}
QBasicAtomicInt threadStressTestControlVar = Q_BASIC_ATOMIC_INITIALIZER(5);
Q_GLOBAL_STATIC_WITH_ARGS(ThrowingType, threadStressTestGS, (threadStressTestControlVar))
void tst_QGlobalStatic::threadStressTest()
{
if (QTestPrivate::isRunningArmOnX86())
QSKIP("Frequently hangs on QEMU, QTBUG-91423");
class ThreadStressTestThread: public QThread
{
public:
QReadWriteLock *lock;
void run() override
{
QReadLocker l(lock);
//usleep(QRandomGenerator::global()->generate(200));
// thundering herd
try {
threadStressTestGS();
} catch (int) {
}
}
};
ThrowingType::constructedCount.storeRelaxed(0);
ThrowingType::destructedCount.storeRelaxed(0);
int expectedConstructionCount = threadStressTestControlVar.loadRelaxed() + 1;
if (expectedConstructionCount <= 0)
QSKIP("This test cannot be run more than once");
#ifdef Q_OS_INTEGRITY
// OPEN_REALTIME_THREADS = 123 on current INTEGRITY environment
// if try to create more, app is halted
const int numThreads = 122;
#else
const int numThreads = 200;
#endif
ThreadStressTestThread threads[numThreads];
QReadWriteLock lock;
lock.lockForWrite();
for (int i = 0; i < numThreads; ++i) {
threads[i].lock = &lock;
threads[i].start();
}
// wait for all threads
// release the herd
lock.unlock();
for (int i = 0; i < numThreads; ++i)
threads[i].wait();
QCOMPARE(ThrowingType::constructedCount.loadAcquire(), expectedConstructionCount);
QCOMPARE(ThrowingType::destructedCount.loadAcquire(), 0);
}
Q_GLOBAL_STATIC(int, checkedAfterDestruction)
void tst_QGlobalStatic::afterDestruction()
{
// this test will not produce results now
// it will simply run some code on destruction (after the global statics have been deleted)
// if that fails, this will cause a crash
// static destruction is LIFO: so we must add our exit-time code before the
// global static is used for the first time
static struct RunAtExit {
~RunAtExit() {
int *ptr = checkedAfterDestruction();
if (ptr)
qFatal("Global static is not null as was expected");
}
} runAtExit;
(void) runAtExit;
*checkedAfterDestruction = 42;
}
QTEST_APPLESS_MAIN(tst_QGlobalStatic);
#include "tst_qglobalstatic.moc"
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