1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/****************************************************************************
**
** Copyright (C) 2016 Research In Motion.
** 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 "../../shared/util.h"
#include <QtCore/QObject>
#include <QtQml/qqml.h>
#include <QtQml/QQmlEngine>
#include <QtQml/QQmlComponent>
#include <private/qhashedstring_p.h>
#include <private/qqmlmetatype_p.h>
//Separate test, because if engine cleanup attempts fail they can easily break unrelated tests
class tst_qqmlenginecleanup : public QQmlDataTest
{
Q_OBJECT
public:
tst_qqmlenginecleanup() {}
private slots:
void test_qmlClearTypeRegistrations();
void test_valueTypeProviderModule(); // QTBUG-43004
};
// A wrapper around QQmlComponent to ensure the temporary reference counts
// on the type data as a result of the main thread <> loader thread communication
// are dropped. Regular Synchronous loading will leave us with an event posted
// to the gui thread and an extra refcount that will only be dropped after the
// event delivery. A plain sendPostedEvents() however is insufficient because
// we can't be sure that the event is posted after the constructor finished.
class CleanlyLoadingComponent : public QQmlComponent
{
public:
CleanlyLoadingComponent(QQmlEngine *engine, const QUrl &url)
: QQmlComponent(engine, url, QQmlComponent::Asynchronous)
{ waitForLoad(); }
CleanlyLoadingComponent(QQmlEngine *engine, const QString &fileName)
: QQmlComponent(engine, fileName, QQmlComponent::Asynchronous)
{ waitForLoad(); }
void waitForLoad()
{
QTRY_VERIFY(status() == QQmlComponent::Ready || status() == QQmlComponent::Error);
}
};
void tst_qqmlenginecleanup::test_qmlClearTypeRegistrations()
{
//Test for preventing memory leaks is in tests/manual/qmltypememory
QQmlEngine* engine;
CleanlyLoadingComponent* component;
QUrl testFile = testFileUrl("types.qml");
const auto qmlTypeForTestType = []() {
return QQmlMetaType::qmlType(QStringLiteral("TestTypeCpp"), QStringLiteral("Test"), 2, 0);
};
QVERIFY(!qmlTypeForTestType().isValid());
qmlRegisterType<QObject>("Test", 2, 0, "TestTypeCpp");
QVERIFY(qmlTypeForTestType().isValid());
engine = new QQmlEngine;
component = new CleanlyLoadingComponent(engine, testFile);
QVERIFY(component->isReady());
delete component;
delete engine;
{
auto cppType = qmlTypeForTestType();
qmlClearTypeRegistrations();
QVERIFY(!qmlTypeForTestType().isValid());
// cppType should hold the last ref, qmlClearTypeRegistration should have wiped
// all internal references.
QCOMPARE(QQmlType::refCount(cppType.priv()), 1);
}
//2nd run verifies that types can reload after a qmlClearTypeRegistrations
qmlRegisterType<QObject>("Test", 2, 0, "TestTypeCpp");
QVERIFY(qmlTypeForTestType().isValid());
engine = new QQmlEngine;
component = new CleanlyLoadingComponent(engine, testFile);
QVERIFY(component->isReady());
delete component;
delete engine;
qmlClearTypeRegistrations();
QVERIFY(!qmlTypeForTestType().isValid());
//3nd run verifies that TestTypeCpp is no longer registered
engine = new QQmlEngine;
component = new CleanlyLoadingComponent(engine, testFile);
QVERIFY(component->isError());
QCOMPARE(component->errorString(),
testFile.toString() +":33 module \"Test\" is not installed\n");
delete component;
delete engine;
}
static void cleanState(QQmlEngine **e)
{
delete *e;
qmlClearTypeRegistrations();
*e = new QQmlEngine;
QCoreApplication::sendPostedEvents(nullptr, QEvent::DeferredDelete);
QCoreApplication::processEvents();
}
void tst_qqmlenginecleanup::test_valueTypeProviderModule()
{
// this test ensures that a module which installs a value type
// provider can be reinitialized after multiple calls to
// qmlClearTypeRegistrations() without causing cycles in the
// value type provider list.
QQmlEngine *e = nullptr;
QUrl testFile1 = testFileUrl("testFile1.qml");
QUrl testFile2 = testFileUrl("testFile2.qml");
bool noCycles = false;
for (int i = 0; i < 20; ++i) {
cleanState(&e);
QQmlComponent c(e, this);
c.loadUrl(i % 2 == 0 ? testFile1 : testFile2); // this will hang if cycles exist.
}
delete e;
e = nullptr;
noCycles = true;
QVERIFY(noCycles);
// this test ensures that no crashes occur due to using
// a dangling QQmlType pointer in the type compiler
// which results from qmlClearTypeRegistrations()
QUrl testFile3 = testFileUrl("testFile3.qml");
bool noDangling = false;
for (int i = 0; i < 20; ++i) {
cleanState(&e);
QQmlComponent c(e, this);
c.loadUrl(i % 2 == 0 ? testFile1 : testFile3); // this will crash if dangling ptr exists.
}
delete e;
noDangling = true;
QVERIFY(noDangling);
}
QTEST_MAIN(tst_qqmlenginecleanup)
#include "tst_qqmlenginecleanup.moc"
|
